elf32-ppc.c revision 1.9
1/* PowerPC-specific support for 32-bit ELF 2 Copyright (C) 1994-2016 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 39typedef enum split16_format_type 40{ 41 split16a_type = 0, 42 split16d_type 43} 44split16_format_type; 45 46/* RELA relocations are used here. */ 47 48static bfd_reloc_status_type ppc_elf_addr16_ha_reloc 49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 50static bfd_reloc_status_type ppc_elf_unhandled_reloc 51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 52 53/* Branch prediction bit for branch taken relocs. */ 54#define BRANCH_PREDICT_BIT 0x200000 55/* Mask to set RA in memory instructions. */ 56#define RA_REGISTER_MASK 0x001f0000 57/* Value to shift register by to insert RA. */ 58#define RA_REGISTER_SHIFT 16 59 60/* The name of the dynamic interpreter. This is put in the .interp 61 section. */ 62#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 63 64/* For old-style PLT. */ 65/* The number of single-slot PLT entries (the rest use two slots). */ 66#define PLT_NUM_SINGLE_ENTRIES 8192 67 68/* For new-style .glink and .plt. */ 69#define GLINK_PLTRESOLVE 16*4 70#define GLINK_ENTRY_SIZE 4*4 71#define TLS_GET_ADDR_GLINK_SIZE 12*4 72 73/* VxWorks uses its own plt layout, filled in by the static linker. */ 74 75/* The standard VxWorks PLT entry. */ 76#define VXWORKS_PLT_ENTRY_SIZE 32 77static const bfd_vma ppc_elf_vxworks_plt_entry 78 [VXWORKS_PLT_ENTRY_SIZE / 4] = 79 { 80 0x3d800000, /* lis r12,0 */ 81 0x818c0000, /* lwz r12,0(r12) */ 82 0x7d8903a6, /* mtctr r12 */ 83 0x4e800420, /* bctr */ 84 0x39600000, /* li r11,0 */ 85 0x48000000, /* b 14 <.PLT0resolve+0x4> */ 86 0x60000000, /* nop */ 87 0x60000000, /* nop */ 88 }; 89static const bfd_vma ppc_elf_vxworks_pic_plt_entry 90 [VXWORKS_PLT_ENTRY_SIZE / 4] = 91 { 92 0x3d9e0000, /* addis r12,r30,0 */ 93 0x818c0000, /* lwz r12,0(r12) */ 94 0x7d8903a6, /* mtctr r12 */ 95 0x4e800420, /* bctr */ 96 0x39600000, /* li r11,0 */ 97 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ 98 0x60000000, /* nop */ 99 0x60000000, /* nop */ 100 }; 101 102/* The initial VxWorks PLT entry. */ 103#define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 104static const bfd_vma ppc_elf_vxworks_plt0_entry 105 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 106 { 107 0x3d800000, /* lis r12,0 */ 108 0x398c0000, /* addi r12,r12,0 */ 109 0x800c0008, /* lwz r0,8(r12) */ 110 0x7c0903a6, /* mtctr r0 */ 111 0x818c0004, /* lwz r12,4(r12) */ 112 0x4e800420, /* bctr */ 113 0x60000000, /* nop */ 114 0x60000000, /* nop */ 115 }; 116static const bfd_vma ppc_elf_vxworks_pic_plt0_entry 117 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 118 { 119 0x819e0008, /* lwz r12,8(r30) */ 120 0x7d8903a6, /* mtctr r12 */ 121 0x819e0004, /* lwz r12,4(r30) */ 122 0x4e800420, /* bctr */ 123 0x60000000, /* nop */ 124 0x60000000, /* nop */ 125 0x60000000, /* nop */ 126 0x60000000, /* nop */ 127 }; 128 129/* For executables, we have some additional relocations in 130 .rela.plt.unloaded, for the kernel loader. */ 131 132/* The number of non-JMP_SLOT relocations per PLT0 slot. */ 133#define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 134/* The number of relocations in the PLTResolve slot. */ 135#define VXWORKS_PLTRESOLVE_RELOCS 2 136/* The number of relocations in the PLTResolve slot when when creating 137 a shared library. */ 138#define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 139 140/* Some instructions. */ 141#define ADDIS_11_11 0x3d6b0000 142#define ADDIS_11_30 0x3d7e0000 143#define ADDIS_12_12 0x3d8c0000 144#define ADDI_11_11 0x396b0000 145#define ADD_0_11_11 0x7c0b5a14 146#define ADD_3_12_2 0x7c6c1214 147#define ADD_11_0_11 0x7d605a14 148#define B 0x48000000 149#define BA 0x48000002 150#define BCL_20_31 0x429f0005 151#define BCTR 0x4e800420 152#define BEQLR 0x4d820020 153#define CMPWI_11_0 0x2c0b0000 154#define LIS_11 0x3d600000 155#define LIS_12 0x3d800000 156#define LWZU_0_12 0x840c0000 157#define LWZ_0_12 0x800c0000 158#define LWZ_11_3 0x81630000 159#define LWZ_11_11 0x816b0000 160#define LWZ_11_30 0x817e0000 161#define LWZ_12_3 0x81830000 162#define LWZ_12_12 0x818c0000 163#define MR_0_3 0x7c601b78 164#define MR_3_0 0x7c030378 165#define MFLR_0 0x7c0802a6 166#define MFLR_12 0x7d8802a6 167#define MTCTR_0 0x7c0903a6 168#define MTCTR_11 0x7d6903a6 169#define MTLR_0 0x7c0803a6 170#define NOP 0x60000000 171#define SUB_11_11_12 0x7d6c5850 172 173/* Offset of tp and dtp pointers from start of TLS block. */ 174#define TP_OFFSET 0x7000 175#define DTP_OFFSET 0x8000 176 177/* The value of a defined global symbol. */ 178#define SYM_VAL(SYM) \ 179 ((SYM)->root.u.def.section->output_section->vma \ 180 + (SYM)->root.u.def.section->output_offset \ 181 + (SYM)->root.u.def.value) 182 183static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; 184 185static reloc_howto_type ppc_elf_howto_raw[] = { 186 /* This reloc does nothing. */ 187 HOWTO (R_PPC_NONE, /* type */ 188 0, /* rightshift */ 189 3, /* size (0 = byte, 1 = short, 2 = long) */ 190 0, /* bitsize */ 191 FALSE, /* pc_relative */ 192 0, /* bitpos */ 193 complain_overflow_dont, /* complain_on_overflow */ 194 bfd_elf_generic_reloc, /* special_function */ 195 "R_PPC_NONE", /* name */ 196 FALSE, /* partial_inplace */ 197 0, /* src_mask */ 198 0, /* dst_mask */ 199 FALSE), /* pcrel_offset */ 200 201 /* A standard 32 bit relocation. */ 202 HOWTO (R_PPC_ADDR32, /* type */ 203 0, /* rightshift */ 204 2, /* size (0 = byte, 1 = short, 2 = long) */ 205 32, /* bitsize */ 206 FALSE, /* pc_relative */ 207 0, /* bitpos */ 208 complain_overflow_dont, /* complain_on_overflow */ 209 bfd_elf_generic_reloc, /* special_function */ 210 "R_PPC_ADDR32", /* name */ 211 FALSE, /* partial_inplace */ 212 0, /* src_mask */ 213 0xffffffff, /* dst_mask */ 214 FALSE), /* pcrel_offset */ 215 216 /* An absolute 26 bit branch; the lower two bits must be zero. 217 FIXME: we don't check that, we just clear them. */ 218 HOWTO (R_PPC_ADDR24, /* type */ 219 0, /* rightshift */ 220 2, /* size (0 = byte, 1 = short, 2 = long) */ 221 26, /* bitsize */ 222 FALSE, /* pc_relative */ 223 0, /* bitpos */ 224 complain_overflow_signed, /* complain_on_overflow */ 225 bfd_elf_generic_reloc, /* special_function */ 226 "R_PPC_ADDR24", /* name */ 227 FALSE, /* partial_inplace */ 228 0, /* src_mask */ 229 0x3fffffc, /* dst_mask */ 230 FALSE), /* pcrel_offset */ 231 232 /* A standard 16 bit relocation. */ 233 HOWTO (R_PPC_ADDR16, /* type */ 234 0, /* rightshift */ 235 1, /* size (0 = byte, 1 = short, 2 = long) */ 236 16, /* bitsize */ 237 FALSE, /* pc_relative */ 238 0, /* bitpos */ 239 complain_overflow_bitfield, /* complain_on_overflow */ 240 bfd_elf_generic_reloc, /* special_function */ 241 "R_PPC_ADDR16", /* name */ 242 FALSE, /* partial_inplace */ 243 0, /* src_mask */ 244 0xffff, /* dst_mask */ 245 FALSE), /* pcrel_offset */ 246 247 /* A 16 bit relocation without overflow. */ 248 HOWTO (R_PPC_ADDR16_LO, /* type */ 249 0, /* rightshift */ 250 1, /* size (0 = byte, 1 = short, 2 = long) */ 251 16, /* bitsize */ 252 FALSE, /* pc_relative */ 253 0, /* bitpos */ 254 complain_overflow_dont,/* complain_on_overflow */ 255 bfd_elf_generic_reloc, /* special_function */ 256 "R_PPC_ADDR16_LO", /* name */ 257 FALSE, /* partial_inplace */ 258 0, /* src_mask */ 259 0xffff, /* dst_mask */ 260 FALSE), /* pcrel_offset */ 261 262 /* The high order 16 bits of an address. */ 263 HOWTO (R_PPC_ADDR16_HI, /* type */ 264 16, /* rightshift */ 265 1, /* size (0 = byte, 1 = short, 2 = long) */ 266 16, /* bitsize */ 267 FALSE, /* pc_relative */ 268 0, /* bitpos */ 269 complain_overflow_dont, /* complain_on_overflow */ 270 bfd_elf_generic_reloc, /* special_function */ 271 "R_PPC_ADDR16_HI", /* name */ 272 FALSE, /* partial_inplace */ 273 0, /* src_mask */ 274 0xffff, /* dst_mask */ 275 FALSE), /* pcrel_offset */ 276 277 /* The high order 16 bits of an address, plus 1 if the contents of 278 the low 16 bits, treated as a signed number, is negative. */ 279 HOWTO (R_PPC_ADDR16_HA, /* type */ 280 16, /* rightshift */ 281 1, /* size (0 = byte, 1 = short, 2 = long) */ 282 16, /* bitsize */ 283 FALSE, /* pc_relative */ 284 0, /* bitpos */ 285 complain_overflow_dont, /* complain_on_overflow */ 286 ppc_elf_addr16_ha_reloc, /* special_function */ 287 "R_PPC_ADDR16_HA", /* name */ 288 FALSE, /* partial_inplace */ 289 0, /* src_mask */ 290 0xffff, /* dst_mask */ 291 FALSE), /* pcrel_offset */ 292 293 /* An absolute 16 bit branch; the lower two bits must be zero. 294 FIXME: we don't check that, we just clear them. */ 295 HOWTO (R_PPC_ADDR14, /* type */ 296 0, /* rightshift */ 297 2, /* size (0 = byte, 1 = short, 2 = long) */ 298 16, /* bitsize */ 299 FALSE, /* pc_relative */ 300 0, /* bitpos */ 301 complain_overflow_signed, /* complain_on_overflow */ 302 bfd_elf_generic_reloc, /* special_function */ 303 "R_PPC_ADDR14", /* name */ 304 FALSE, /* partial_inplace */ 305 0, /* src_mask */ 306 0xfffc, /* dst_mask */ 307 FALSE), /* pcrel_offset */ 308 309 /* An absolute 16 bit branch, for which bit 10 should be set to 310 indicate that the branch is expected to be taken. The lower two 311 bits must be zero. */ 312 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ 313 0, /* rightshift */ 314 2, /* size (0 = byte, 1 = short, 2 = long) */ 315 16, /* bitsize */ 316 FALSE, /* pc_relative */ 317 0, /* bitpos */ 318 complain_overflow_signed, /* complain_on_overflow */ 319 bfd_elf_generic_reloc, /* special_function */ 320 "R_PPC_ADDR14_BRTAKEN",/* name */ 321 FALSE, /* partial_inplace */ 322 0, /* src_mask */ 323 0xfffc, /* dst_mask */ 324 FALSE), /* pcrel_offset */ 325 326 /* An absolute 16 bit branch, for which bit 10 should be set to 327 indicate that the branch is not expected to be taken. The lower 328 two bits must be zero. */ 329 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ 330 0, /* rightshift */ 331 2, /* size (0 = byte, 1 = short, 2 = long) */ 332 16, /* bitsize */ 333 FALSE, /* pc_relative */ 334 0, /* bitpos */ 335 complain_overflow_signed, /* complain_on_overflow */ 336 bfd_elf_generic_reloc, /* special_function */ 337 "R_PPC_ADDR14_BRNTAKEN",/* name */ 338 FALSE, /* partial_inplace */ 339 0, /* src_mask */ 340 0xfffc, /* dst_mask */ 341 FALSE), /* pcrel_offset */ 342 343 /* A relative 26 bit branch; the lower two bits must be zero. */ 344 HOWTO (R_PPC_REL24, /* type */ 345 0, /* rightshift */ 346 2, /* size (0 = byte, 1 = short, 2 = long) */ 347 26, /* bitsize */ 348 TRUE, /* pc_relative */ 349 0, /* bitpos */ 350 complain_overflow_signed, /* complain_on_overflow */ 351 bfd_elf_generic_reloc, /* special_function */ 352 "R_PPC_REL24", /* name */ 353 FALSE, /* partial_inplace */ 354 0, /* src_mask */ 355 0x3fffffc, /* dst_mask */ 356 TRUE), /* pcrel_offset */ 357 358 /* A relative 16 bit branch; the lower two bits must be zero. */ 359 HOWTO (R_PPC_REL14, /* type */ 360 0, /* rightshift */ 361 2, /* size (0 = byte, 1 = short, 2 = long) */ 362 16, /* bitsize */ 363 TRUE, /* pc_relative */ 364 0, /* bitpos */ 365 complain_overflow_signed, /* complain_on_overflow */ 366 bfd_elf_generic_reloc, /* special_function */ 367 "R_PPC_REL14", /* name */ 368 FALSE, /* partial_inplace */ 369 0, /* src_mask */ 370 0xfffc, /* dst_mask */ 371 TRUE), /* pcrel_offset */ 372 373 /* A relative 16 bit branch. Bit 10 should be set to indicate that 374 the branch is expected to be taken. The lower two bits must be 375 zero. */ 376 HOWTO (R_PPC_REL14_BRTAKEN, /* type */ 377 0, /* rightshift */ 378 2, /* size (0 = byte, 1 = short, 2 = long) */ 379 16, /* bitsize */ 380 TRUE, /* pc_relative */ 381 0, /* bitpos */ 382 complain_overflow_signed, /* complain_on_overflow */ 383 bfd_elf_generic_reloc, /* special_function */ 384 "R_PPC_REL14_BRTAKEN", /* name */ 385 FALSE, /* partial_inplace */ 386 0, /* src_mask */ 387 0xfffc, /* dst_mask */ 388 TRUE), /* pcrel_offset */ 389 390 /* A relative 16 bit branch. Bit 10 should be set to indicate that 391 the branch is not expected to be taken. The lower two bits must 392 be zero. */ 393 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ 394 0, /* rightshift */ 395 2, /* size (0 = byte, 1 = short, 2 = long) */ 396 16, /* bitsize */ 397 TRUE, /* pc_relative */ 398 0, /* bitpos */ 399 complain_overflow_signed, /* complain_on_overflow */ 400 bfd_elf_generic_reloc, /* special_function */ 401 "R_PPC_REL14_BRNTAKEN",/* name */ 402 FALSE, /* partial_inplace */ 403 0, /* src_mask */ 404 0xfffc, /* dst_mask */ 405 TRUE), /* pcrel_offset */ 406 407 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the 408 symbol. */ 409 HOWTO (R_PPC_GOT16, /* type */ 410 0, /* rightshift */ 411 1, /* size (0 = byte, 1 = short, 2 = long) */ 412 16, /* bitsize */ 413 FALSE, /* pc_relative */ 414 0, /* bitpos */ 415 complain_overflow_signed, /* complain_on_overflow */ 416 bfd_elf_generic_reloc, /* special_function */ 417 "R_PPC_GOT16", /* name */ 418 FALSE, /* partial_inplace */ 419 0, /* src_mask */ 420 0xffff, /* dst_mask */ 421 FALSE), /* pcrel_offset */ 422 423 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for 424 the symbol. */ 425 HOWTO (R_PPC_GOT16_LO, /* type */ 426 0, /* rightshift */ 427 1, /* size (0 = byte, 1 = short, 2 = long) */ 428 16, /* bitsize */ 429 FALSE, /* pc_relative */ 430 0, /* bitpos */ 431 complain_overflow_dont, /* complain_on_overflow */ 432 bfd_elf_generic_reloc, /* special_function */ 433 "R_PPC_GOT16_LO", /* name */ 434 FALSE, /* partial_inplace */ 435 0, /* src_mask */ 436 0xffff, /* dst_mask */ 437 FALSE), /* pcrel_offset */ 438 439 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for 440 the symbol. */ 441 HOWTO (R_PPC_GOT16_HI, /* type */ 442 16, /* rightshift */ 443 1, /* size (0 = byte, 1 = short, 2 = long) */ 444 16, /* bitsize */ 445 FALSE, /* pc_relative */ 446 0, /* bitpos */ 447 complain_overflow_dont, /* complain_on_overflow */ 448 bfd_elf_generic_reloc, /* special_function */ 449 "R_PPC_GOT16_HI", /* name */ 450 FALSE, /* partial_inplace */ 451 0, /* src_mask */ 452 0xffff, /* dst_mask */ 453 FALSE), /* pcrel_offset */ 454 455 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for 456 the symbol. */ 457 HOWTO (R_PPC_GOT16_HA, /* type */ 458 16, /* rightshift */ 459 1, /* size (0 = byte, 1 = short, 2 = long) */ 460 16, /* bitsize */ 461 FALSE, /* pc_relative */ 462 0, /* bitpos */ 463 complain_overflow_dont, /* complain_on_overflow */ 464 ppc_elf_addr16_ha_reloc, /* special_function */ 465 "R_PPC_GOT16_HA", /* name */ 466 FALSE, /* partial_inplace */ 467 0, /* src_mask */ 468 0xffff, /* dst_mask */ 469 FALSE), /* pcrel_offset */ 470 471 /* Like R_PPC_REL24, but referring to the procedure linkage table 472 entry for the symbol. */ 473 HOWTO (R_PPC_PLTREL24, /* type */ 474 0, /* rightshift */ 475 2, /* size (0 = byte, 1 = short, 2 = long) */ 476 26, /* bitsize */ 477 TRUE, /* pc_relative */ 478 0, /* bitpos */ 479 complain_overflow_signed, /* complain_on_overflow */ 480 bfd_elf_generic_reloc, /* special_function */ 481 "R_PPC_PLTREL24", /* name */ 482 FALSE, /* partial_inplace */ 483 0, /* src_mask */ 484 0x3fffffc, /* dst_mask */ 485 TRUE), /* pcrel_offset */ 486 487 /* This is used only by the dynamic linker. The symbol should exist 488 both in the object being run and in some shared library. The 489 dynamic linker copies the data addressed by the symbol from the 490 shared library into the object, because the object being 491 run has to have the data at some particular address. */ 492 HOWTO (R_PPC_COPY, /* type */ 493 0, /* rightshift */ 494 2, /* size (0 = byte, 1 = short, 2 = long) */ 495 32, /* bitsize */ 496 FALSE, /* pc_relative */ 497 0, /* bitpos */ 498 complain_overflow_dont, /* complain_on_overflow */ 499 bfd_elf_generic_reloc, /* special_function */ 500 "R_PPC_COPY", /* name */ 501 FALSE, /* partial_inplace */ 502 0, /* src_mask */ 503 0, /* dst_mask */ 504 FALSE), /* pcrel_offset */ 505 506 /* Like R_PPC_ADDR32, but used when setting global offset table 507 entries. */ 508 HOWTO (R_PPC_GLOB_DAT, /* type */ 509 0, /* rightshift */ 510 2, /* size (0 = byte, 1 = short, 2 = long) */ 511 32, /* bitsize */ 512 FALSE, /* pc_relative */ 513 0, /* bitpos */ 514 complain_overflow_dont, /* complain_on_overflow */ 515 bfd_elf_generic_reloc, /* special_function */ 516 "R_PPC_GLOB_DAT", /* name */ 517 FALSE, /* partial_inplace */ 518 0, /* src_mask */ 519 0xffffffff, /* dst_mask */ 520 FALSE), /* pcrel_offset */ 521 522 /* Marks a procedure linkage table entry for a symbol. */ 523 HOWTO (R_PPC_JMP_SLOT, /* type */ 524 0, /* rightshift */ 525 2, /* size (0 = byte, 1 = short, 2 = long) */ 526 32, /* bitsize */ 527 FALSE, /* pc_relative */ 528 0, /* bitpos */ 529 complain_overflow_dont, /* complain_on_overflow */ 530 bfd_elf_generic_reloc, /* special_function */ 531 "R_PPC_JMP_SLOT", /* name */ 532 FALSE, /* partial_inplace */ 533 0, /* src_mask */ 534 0, /* dst_mask */ 535 FALSE), /* pcrel_offset */ 536 537 /* Used only by the dynamic linker. When the object is run, this 538 longword is set to the load address of the object, plus the 539 addend. */ 540 HOWTO (R_PPC_RELATIVE, /* type */ 541 0, /* rightshift */ 542 2, /* size (0 = byte, 1 = short, 2 = long) */ 543 32, /* bitsize */ 544 FALSE, /* pc_relative */ 545 0, /* bitpos */ 546 complain_overflow_dont, /* complain_on_overflow */ 547 bfd_elf_generic_reloc, /* special_function */ 548 "R_PPC_RELATIVE", /* name */ 549 FALSE, /* partial_inplace */ 550 0, /* src_mask */ 551 0xffffffff, /* dst_mask */ 552 FALSE), /* pcrel_offset */ 553 554 /* Like R_PPC_REL24, but uses the value of the symbol within the 555 object rather than the final value. Normally used for 556 _GLOBAL_OFFSET_TABLE_. */ 557 HOWTO (R_PPC_LOCAL24PC, /* type */ 558 0, /* rightshift */ 559 2, /* size (0 = byte, 1 = short, 2 = long) */ 560 26, /* bitsize */ 561 TRUE, /* pc_relative */ 562 0, /* bitpos */ 563 complain_overflow_signed, /* complain_on_overflow */ 564 bfd_elf_generic_reloc, /* special_function */ 565 "R_PPC_LOCAL24PC", /* name */ 566 FALSE, /* partial_inplace */ 567 0, /* src_mask */ 568 0x3fffffc, /* dst_mask */ 569 TRUE), /* pcrel_offset */ 570 571 /* Like R_PPC_ADDR32, but may be unaligned. */ 572 HOWTO (R_PPC_UADDR32, /* type */ 573 0, /* rightshift */ 574 2, /* size (0 = byte, 1 = short, 2 = long) */ 575 32, /* bitsize */ 576 FALSE, /* pc_relative */ 577 0, /* bitpos */ 578 complain_overflow_dont, /* complain_on_overflow */ 579 bfd_elf_generic_reloc, /* special_function */ 580 "R_PPC_UADDR32", /* name */ 581 FALSE, /* partial_inplace */ 582 0, /* src_mask */ 583 0xffffffff, /* dst_mask */ 584 FALSE), /* pcrel_offset */ 585 586 /* Like R_PPC_ADDR16, but may be unaligned. */ 587 HOWTO (R_PPC_UADDR16, /* type */ 588 0, /* rightshift */ 589 1, /* size (0 = byte, 1 = short, 2 = long) */ 590 16, /* bitsize */ 591 FALSE, /* pc_relative */ 592 0, /* bitpos */ 593 complain_overflow_bitfield, /* complain_on_overflow */ 594 bfd_elf_generic_reloc, /* special_function */ 595 "R_PPC_UADDR16", /* name */ 596 FALSE, /* partial_inplace */ 597 0, /* src_mask */ 598 0xffff, /* dst_mask */ 599 FALSE), /* pcrel_offset */ 600 601 /* 32-bit PC relative */ 602 HOWTO (R_PPC_REL32, /* type */ 603 0, /* rightshift */ 604 2, /* size (0 = byte, 1 = short, 2 = long) */ 605 32, /* bitsize */ 606 TRUE, /* pc_relative */ 607 0, /* bitpos */ 608 complain_overflow_dont, /* complain_on_overflow */ 609 bfd_elf_generic_reloc, /* special_function */ 610 "R_PPC_REL32", /* name */ 611 FALSE, /* partial_inplace */ 612 0, /* src_mask */ 613 0xffffffff, /* dst_mask */ 614 TRUE), /* pcrel_offset */ 615 616 /* 32-bit relocation to the symbol's procedure linkage table. 617 FIXME: not supported. */ 618 HOWTO (R_PPC_PLT32, /* type */ 619 0, /* rightshift */ 620 2, /* size (0 = byte, 1 = short, 2 = long) */ 621 32, /* bitsize */ 622 FALSE, /* pc_relative */ 623 0, /* bitpos */ 624 complain_overflow_dont, /* complain_on_overflow */ 625 bfd_elf_generic_reloc, /* special_function */ 626 "R_PPC_PLT32", /* name */ 627 FALSE, /* partial_inplace */ 628 0, /* src_mask */ 629 0, /* dst_mask */ 630 FALSE), /* pcrel_offset */ 631 632 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 633 FIXME: not supported. */ 634 HOWTO (R_PPC_PLTREL32, /* type */ 635 0, /* rightshift */ 636 2, /* size (0 = byte, 1 = short, 2 = long) */ 637 32, /* bitsize */ 638 TRUE, /* pc_relative */ 639 0, /* bitpos */ 640 complain_overflow_dont, /* complain_on_overflow */ 641 bfd_elf_generic_reloc, /* special_function */ 642 "R_PPC_PLTREL32", /* name */ 643 FALSE, /* partial_inplace */ 644 0, /* src_mask */ 645 0, /* dst_mask */ 646 TRUE), /* pcrel_offset */ 647 648 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for 649 the symbol. */ 650 HOWTO (R_PPC_PLT16_LO, /* type */ 651 0, /* rightshift */ 652 1, /* size (0 = byte, 1 = short, 2 = long) */ 653 16, /* bitsize */ 654 FALSE, /* pc_relative */ 655 0, /* bitpos */ 656 complain_overflow_dont, /* complain_on_overflow */ 657 bfd_elf_generic_reloc, /* special_function */ 658 "R_PPC_PLT16_LO", /* name */ 659 FALSE, /* partial_inplace */ 660 0, /* src_mask */ 661 0xffff, /* dst_mask */ 662 FALSE), /* pcrel_offset */ 663 664 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for 665 the symbol. */ 666 HOWTO (R_PPC_PLT16_HI, /* type */ 667 16, /* rightshift */ 668 1, /* size (0 = byte, 1 = short, 2 = long) */ 669 16, /* bitsize */ 670 FALSE, /* pc_relative */ 671 0, /* bitpos */ 672 complain_overflow_dont, /* complain_on_overflow */ 673 bfd_elf_generic_reloc, /* special_function */ 674 "R_PPC_PLT16_HI", /* name */ 675 FALSE, /* partial_inplace */ 676 0, /* src_mask */ 677 0xffff, /* dst_mask */ 678 FALSE), /* pcrel_offset */ 679 680 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for 681 the symbol. */ 682 HOWTO (R_PPC_PLT16_HA, /* type */ 683 16, /* rightshift */ 684 1, /* size (0 = byte, 1 = short, 2 = long) */ 685 16, /* bitsize */ 686 FALSE, /* pc_relative */ 687 0, /* bitpos */ 688 complain_overflow_dont, /* complain_on_overflow */ 689 ppc_elf_addr16_ha_reloc, /* special_function */ 690 "R_PPC_PLT16_HA", /* name */ 691 FALSE, /* partial_inplace */ 692 0, /* src_mask */ 693 0xffff, /* dst_mask */ 694 FALSE), /* pcrel_offset */ 695 696 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with 697 small data items. */ 698 HOWTO (R_PPC_SDAREL16, /* type */ 699 0, /* rightshift */ 700 1, /* size (0 = byte, 1 = short, 2 = long) */ 701 16, /* bitsize */ 702 FALSE, /* pc_relative */ 703 0, /* bitpos */ 704 complain_overflow_signed, /* complain_on_overflow */ 705 bfd_elf_generic_reloc, /* special_function */ 706 "R_PPC_SDAREL16", /* name */ 707 FALSE, /* partial_inplace */ 708 0, /* src_mask */ 709 0xffff, /* dst_mask */ 710 FALSE), /* pcrel_offset */ 711 712 /* 16-bit section relative relocation. */ 713 HOWTO (R_PPC_SECTOFF, /* type */ 714 0, /* rightshift */ 715 1, /* size (0 = byte, 1 = short, 2 = long) */ 716 16, /* bitsize */ 717 FALSE, /* pc_relative */ 718 0, /* bitpos */ 719 complain_overflow_signed, /* complain_on_overflow */ 720 bfd_elf_generic_reloc, /* special_function */ 721 "R_PPC_SECTOFF", /* name */ 722 FALSE, /* partial_inplace */ 723 0, /* src_mask */ 724 0xffff, /* dst_mask */ 725 FALSE), /* pcrel_offset */ 726 727 /* 16-bit lower half section relative relocation. */ 728 HOWTO (R_PPC_SECTOFF_LO, /* type */ 729 0, /* rightshift */ 730 1, /* size (0 = byte, 1 = short, 2 = long) */ 731 16, /* bitsize */ 732 FALSE, /* pc_relative */ 733 0, /* bitpos */ 734 complain_overflow_dont, /* complain_on_overflow */ 735 bfd_elf_generic_reloc, /* special_function */ 736 "R_PPC_SECTOFF_LO", /* name */ 737 FALSE, /* partial_inplace */ 738 0, /* src_mask */ 739 0xffff, /* dst_mask */ 740 FALSE), /* pcrel_offset */ 741 742 /* 16-bit upper half section relative relocation. */ 743 HOWTO (R_PPC_SECTOFF_HI, /* type */ 744 16, /* rightshift */ 745 1, /* size (0 = byte, 1 = short, 2 = long) */ 746 16, /* bitsize */ 747 FALSE, /* pc_relative */ 748 0, /* bitpos */ 749 complain_overflow_dont, /* complain_on_overflow */ 750 bfd_elf_generic_reloc, /* special_function */ 751 "R_PPC_SECTOFF_HI", /* name */ 752 FALSE, /* partial_inplace */ 753 0, /* src_mask */ 754 0xffff, /* dst_mask */ 755 FALSE), /* pcrel_offset */ 756 757 /* 16-bit upper half adjusted section relative relocation. */ 758 HOWTO (R_PPC_SECTOFF_HA, /* type */ 759 16, /* rightshift */ 760 1, /* size (0 = byte, 1 = short, 2 = long) */ 761 16, /* bitsize */ 762 FALSE, /* pc_relative */ 763 0, /* bitpos */ 764 complain_overflow_dont, /* complain_on_overflow */ 765 ppc_elf_addr16_ha_reloc, /* special_function */ 766 "R_PPC_SECTOFF_HA", /* name */ 767 FALSE, /* partial_inplace */ 768 0, /* src_mask */ 769 0xffff, /* dst_mask */ 770 FALSE), /* pcrel_offset */ 771 772 /* Marker relocs for TLS. */ 773 HOWTO (R_PPC_TLS, 774 0, /* rightshift */ 775 2, /* size (0 = byte, 1 = short, 2 = long) */ 776 32, /* bitsize */ 777 FALSE, /* pc_relative */ 778 0, /* bitpos */ 779 complain_overflow_dont, /* complain_on_overflow */ 780 bfd_elf_generic_reloc, /* special_function */ 781 "R_PPC_TLS", /* name */ 782 FALSE, /* partial_inplace */ 783 0, /* src_mask */ 784 0, /* dst_mask */ 785 FALSE), /* pcrel_offset */ 786 787 HOWTO (R_PPC_TLSGD, 788 0, /* rightshift */ 789 2, /* size (0 = byte, 1 = short, 2 = long) */ 790 32, /* bitsize */ 791 FALSE, /* pc_relative */ 792 0, /* bitpos */ 793 complain_overflow_dont, /* complain_on_overflow */ 794 bfd_elf_generic_reloc, /* special_function */ 795 "R_PPC_TLSGD", /* name */ 796 FALSE, /* partial_inplace */ 797 0, /* src_mask */ 798 0, /* dst_mask */ 799 FALSE), /* pcrel_offset */ 800 801 HOWTO (R_PPC_TLSLD, 802 0, /* rightshift */ 803 2, /* size (0 = byte, 1 = short, 2 = long) */ 804 32, /* bitsize */ 805 FALSE, /* pc_relative */ 806 0, /* bitpos */ 807 complain_overflow_dont, /* complain_on_overflow */ 808 bfd_elf_generic_reloc, /* special_function */ 809 "R_PPC_TLSLD", /* name */ 810 FALSE, /* partial_inplace */ 811 0, /* src_mask */ 812 0, /* dst_mask */ 813 FALSE), /* pcrel_offset */ 814 815 /* Computes the load module index of the load module that contains the 816 definition of its TLS sym. */ 817 HOWTO (R_PPC_DTPMOD32, 818 0, /* rightshift */ 819 2, /* size (0 = byte, 1 = short, 2 = long) */ 820 32, /* bitsize */ 821 FALSE, /* pc_relative */ 822 0, /* bitpos */ 823 complain_overflow_dont, /* complain_on_overflow */ 824 ppc_elf_unhandled_reloc, /* special_function */ 825 "R_PPC_DTPMOD32", /* name */ 826 FALSE, /* partial_inplace */ 827 0, /* src_mask */ 828 0xffffffff, /* dst_mask */ 829 FALSE), /* pcrel_offset */ 830 831 /* Computes a dtv-relative displacement, the difference between the value 832 of sym+add and the base address of the thread-local storage block that 833 contains the definition of sym, minus 0x8000. */ 834 HOWTO (R_PPC_DTPREL32, 835 0, /* rightshift */ 836 2, /* size (0 = byte, 1 = short, 2 = long) */ 837 32, /* bitsize */ 838 FALSE, /* pc_relative */ 839 0, /* bitpos */ 840 complain_overflow_dont, /* complain_on_overflow */ 841 ppc_elf_unhandled_reloc, /* special_function */ 842 "R_PPC_DTPREL32", /* name */ 843 FALSE, /* partial_inplace */ 844 0, /* src_mask */ 845 0xffffffff, /* dst_mask */ 846 FALSE), /* pcrel_offset */ 847 848 /* A 16 bit dtprel reloc. */ 849 HOWTO (R_PPC_DTPREL16, 850 0, /* rightshift */ 851 1, /* size (0 = byte, 1 = short, 2 = long) */ 852 16, /* bitsize */ 853 FALSE, /* pc_relative */ 854 0, /* bitpos */ 855 complain_overflow_signed, /* complain_on_overflow */ 856 ppc_elf_unhandled_reloc, /* special_function */ 857 "R_PPC_DTPREL16", /* name */ 858 FALSE, /* partial_inplace */ 859 0, /* src_mask */ 860 0xffff, /* dst_mask */ 861 FALSE), /* pcrel_offset */ 862 863 /* Like DTPREL16, but no overflow. */ 864 HOWTO (R_PPC_DTPREL16_LO, 865 0, /* rightshift */ 866 1, /* size (0 = byte, 1 = short, 2 = long) */ 867 16, /* bitsize */ 868 FALSE, /* pc_relative */ 869 0, /* bitpos */ 870 complain_overflow_dont, /* complain_on_overflow */ 871 ppc_elf_unhandled_reloc, /* special_function */ 872 "R_PPC_DTPREL16_LO", /* name */ 873 FALSE, /* partial_inplace */ 874 0, /* src_mask */ 875 0xffff, /* dst_mask */ 876 FALSE), /* pcrel_offset */ 877 878 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 879 HOWTO (R_PPC_DTPREL16_HI, 880 16, /* rightshift */ 881 1, /* size (0 = byte, 1 = short, 2 = long) */ 882 16, /* bitsize */ 883 FALSE, /* pc_relative */ 884 0, /* bitpos */ 885 complain_overflow_dont, /* complain_on_overflow */ 886 ppc_elf_unhandled_reloc, /* special_function */ 887 "R_PPC_DTPREL16_HI", /* name */ 888 FALSE, /* partial_inplace */ 889 0, /* src_mask */ 890 0xffff, /* dst_mask */ 891 FALSE), /* pcrel_offset */ 892 893 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 894 HOWTO (R_PPC_DTPREL16_HA, 895 16, /* rightshift */ 896 1, /* size (0 = byte, 1 = short, 2 = long) */ 897 16, /* bitsize */ 898 FALSE, /* pc_relative */ 899 0, /* bitpos */ 900 complain_overflow_dont, /* complain_on_overflow */ 901 ppc_elf_unhandled_reloc, /* special_function */ 902 "R_PPC_DTPREL16_HA", /* name */ 903 FALSE, /* partial_inplace */ 904 0, /* src_mask */ 905 0xffff, /* dst_mask */ 906 FALSE), /* pcrel_offset */ 907 908 /* Computes a tp-relative displacement, the difference between the value of 909 sym+add and the value of the thread pointer (r13). */ 910 HOWTO (R_PPC_TPREL32, 911 0, /* rightshift */ 912 2, /* size (0 = byte, 1 = short, 2 = long) */ 913 32, /* bitsize */ 914 FALSE, /* pc_relative */ 915 0, /* bitpos */ 916 complain_overflow_dont, /* complain_on_overflow */ 917 ppc_elf_unhandled_reloc, /* special_function */ 918 "R_PPC_TPREL32", /* name */ 919 FALSE, /* partial_inplace */ 920 0, /* src_mask */ 921 0xffffffff, /* dst_mask */ 922 FALSE), /* pcrel_offset */ 923 924 /* A 16 bit tprel reloc. */ 925 HOWTO (R_PPC_TPREL16, 926 0, /* rightshift */ 927 1, /* size (0 = byte, 1 = short, 2 = long) */ 928 16, /* bitsize */ 929 FALSE, /* pc_relative */ 930 0, /* bitpos */ 931 complain_overflow_signed, /* complain_on_overflow */ 932 ppc_elf_unhandled_reloc, /* special_function */ 933 "R_PPC_TPREL16", /* name */ 934 FALSE, /* partial_inplace */ 935 0, /* src_mask */ 936 0xffff, /* dst_mask */ 937 FALSE), /* pcrel_offset */ 938 939 /* Like TPREL16, but no overflow. */ 940 HOWTO (R_PPC_TPREL16_LO, 941 0, /* rightshift */ 942 1, /* size (0 = byte, 1 = short, 2 = long) */ 943 16, /* bitsize */ 944 FALSE, /* pc_relative */ 945 0, /* bitpos */ 946 complain_overflow_dont, /* complain_on_overflow */ 947 ppc_elf_unhandled_reloc, /* special_function */ 948 "R_PPC_TPREL16_LO", /* name */ 949 FALSE, /* partial_inplace */ 950 0, /* src_mask */ 951 0xffff, /* dst_mask */ 952 FALSE), /* pcrel_offset */ 953 954 /* Like TPREL16_LO, but next higher group of 16 bits. */ 955 HOWTO (R_PPC_TPREL16_HI, 956 16, /* rightshift */ 957 1, /* size (0 = byte, 1 = short, 2 = long) */ 958 16, /* bitsize */ 959 FALSE, /* pc_relative */ 960 0, /* bitpos */ 961 complain_overflow_dont, /* complain_on_overflow */ 962 ppc_elf_unhandled_reloc, /* special_function */ 963 "R_PPC_TPREL16_HI", /* name */ 964 FALSE, /* partial_inplace */ 965 0, /* src_mask */ 966 0xffff, /* dst_mask */ 967 FALSE), /* pcrel_offset */ 968 969 /* Like TPREL16_HI, but adjust for low 16 bits. */ 970 HOWTO (R_PPC_TPREL16_HA, 971 16, /* rightshift */ 972 1, /* size (0 = byte, 1 = short, 2 = long) */ 973 16, /* bitsize */ 974 FALSE, /* pc_relative */ 975 0, /* bitpos */ 976 complain_overflow_dont, /* complain_on_overflow */ 977 ppc_elf_unhandled_reloc, /* special_function */ 978 "R_PPC_TPREL16_HA", /* name */ 979 FALSE, /* partial_inplace */ 980 0, /* src_mask */ 981 0xffff, /* dst_mask */ 982 FALSE), /* pcrel_offset */ 983 984 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 985 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 986 to the first entry. */ 987 HOWTO (R_PPC_GOT_TLSGD16, 988 0, /* rightshift */ 989 1, /* size (0 = byte, 1 = short, 2 = long) */ 990 16, /* bitsize */ 991 FALSE, /* pc_relative */ 992 0, /* bitpos */ 993 complain_overflow_signed, /* complain_on_overflow */ 994 ppc_elf_unhandled_reloc, /* special_function */ 995 "R_PPC_GOT_TLSGD16", /* name */ 996 FALSE, /* partial_inplace */ 997 0, /* src_mask */ 998 0xffff, /* dst_mask */ 999 FALSE), /* pcrel_offset */ 1000 1001 /* Like GOT_TLSGD16, but no overflow. */ 1002 HOWTO (R_PPC_GOT_TLSGD16_LO, 1003 0, /* rightshift */ 1004 1, /* size (0 = byte, 1 = short, 2 = long) */ 1005 16, /* bitsize */ 1006 FALSE, /* pc_relative */ 1007 0, /* bitpos */ 1008 complain_overflow_dont, /* complain_on_overflow */ 1009 ppc_elf_unhandled_reloc, /* special_function */ 1010 "R_PPC_GOT_TLSGD16_LO", /* name */ 1011 FALSE, /* partial_inplace */ 1012 0, /* src_mask */ 1013 0xffff, /* dst_mask */ 1014 FALSE), /* pcrel_offset */ 1015 1016 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 1017 HOWTO (R_PPC_GOT_TLSGD16_HI, 1018 16, /* rightshift */ 1019 1, /* size (0 = byte, 1 = short, 2 = long) */ 1020 16, /* bitsize */ 1021 FALSE, /* pc_relative */ 1022 0, /* bitpos */ 1023 complain_overflow_dont, /* complain_on_overflow */ 1024 ppc_elf_unhandled_reloc, /* special_function */ 1025 "R_PPC_GOT_TLSGD16_HI", /* name */ 1026 FALSE, /* partial_inplace */ 1027 0, /* src_mask */ 1028 0xffff, /* dst_mask */ 1029 FALSE), /* pcrel_offset */ 1030 1031 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 1032 HOWTO (R_PPC_GOT_TLSGD16_HA, 1033 16, /* rightshift */ 1034 1, /* size (0 = byte, 1 = short, 2 = long) */ 1035 16, /* bitsize */ 1036 FALSE, /* pc_relative */ 1037 0, /* bitpos */ 1038 complain_overflow_dont, /* complain_on_overflow */ 1039 ppc_elf_unhandled_reloc, /* special_function */ 1040 "R_PPC_GOT_TLSGD16_HA", /* name */ 1041 FALSE, /* partial_inplace */ 1042 0, /* src_mask */ 1043 0xffff, /* dst_mask */ 1044 FALSE), /* pcrel_offset */ 1045 1046 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1047 with values (sym+add)@dtpmod and zero, and computes the offset to the 1048 first entry. */ 1049 HOWTO (R_PPC_GOT_TLSLD16, 1050 0, /* rightshift */ 1051 1, /* size (0 = byte, 1 = short, 2 = long) */ 1052 16, /* bitsize */ 1053 FALSE, /* pc_relative */ 1054 0, /* bitpos */ 1055 complain_overflow_signed, /* complain_on_overflow */ 1056 ppc_elf_unhandled_reloc, /* special_function */ 1057 "R_PPC_GOT_TLSLD16", /* name */ 1058 FALSE, /* partial_inplace */ 1059 0, /* src_mask */ 1060 0xffff, /* dst_mask */ 1061 FALSE), /* pcrel_offset */ 1062 1063 /* Like GOT_TLSLD16, but no overflow. */ 1064 HOWTO (R_PPC_GOT_TLSLD16_LO, 1065 0, /* rightshift */ 1066 1, /* size (0 = byte, 1 = short, 2 = long) */ 1067 16, /* bitsize */ 1068 FALSE, /* pc_relative */ 1069 0, /* bitpos */ 1070 complain_overflow_dont, /* complain_on_overflow */ 1071 ppc_elf_unhandled_reloc, /* special_function */ 1072 "R_PPC_GOT_TLSLD16_LO", /* name */ 1073 FALSE, /* partial_inplace */ 1074 0, /* src_mask */ 1075 0xffff, /* dst_mask */ 1076 FALSE), /* pcrel_offset */ 1077 1078 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1079 HOWTO (R_PPC_GOT_TLSLD16_HI, 1080 16, /* rightshift */ 1081 1, /* size (0 = byte, 1 = short, 2 = long) */ 1082 16, /* bitsize */ 1083 FALSE, /* pc_relative */ 1084 0, /* bitpos */ 1085 complain_overflow_dont, /* complain_on_overflow */ 1086 ppc_elf_unhandled_reloc, /* special_function */ 1087 "R_PPC_GOT_TLSLD16_HI", /* name */ 1088 FALSE, /* partial_inplace */ 1089 0, /* src_mask */ 1090 0xffff, /* dst_mask */ 1091 FALSE), /* pcrel_offset */ 1092 1093 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1094 HOWTO (R_PPC_GOT_TLSLD16_HA, 1095 16, /* rightshift */ 1096 1, /* size (0 = byte, 1 = short, 2 = long) */ 1097 16, /* bitsize */ 1098 FALSE, /* pc_relative */ 1099 0, /* bitpos */ 1100 complain_overflow_dont, /* complain_on_overflow */ 1101 ppc_elf_unhandled_reloc, /* special_function */ 1102 "R_PPC_GOT_TLSLD16_HA", /* name */ 1103 FALSE, /* partial_inplace */ 1104 0, /* src_mask */ 1105 0xffff, /* dst_mask */ 1106 FALSE), /* pcrel_offset */ 1107 1108 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1109 the offset to the entry. */ 1110 HOWTO (R_PPC_GOT_DTPREL16, 1111 0, /* rightshift */ 1112 1, /* size (0 = byte, 1 = short, 2 = long) */ 1113 16, /* bitsize */ 1114 FALSE, /* pc_relative */ 1115 0, /* bitpos */ 1116 complain_overflow_signed, /* complain_on_overflow */ 1117 ppc_elf_unhandled_reloc, /* special_function */ 1118 "R_PPC_GOT_DTPREL16", /* name */ 1119 FALSE, /* partial_inplace */ 1120 0, /* src_mask */ 1121 0xffff, /* dst_mask */ 1122 FALSE), /* pcrel_offset */ 1123 1124 /* Like GOT_DTPREL16, but no overflow. */ 1125 HOWTO (R_PPC_GOT_DTPREL16_LO, 1126 0, /* rightshift */ 1127 1, /* size (0 = byte, 1 = short, 2 = long) */ 1128 16, /* bitsize */ 1129 FALSE, /* pc_relative */ 1130 0, /* bitpos */ 1131 complain_overflow_dont, /* complain_on_overflow */ 1132 ppc_elf_unhandled_reloc, /* special_function */ 1133 "R_PPC_GOT_DTPREL16_LO", /* name */ 1134 FALSE, /* partial_inplace */ 1135 0, /* src_mask */ 1136 0xffff, /* dst_mask */ 1137 FALSE), /* pcrel_offset */ 1138 1139 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ 1140 HOWTO (R_PPC_GOT_DTPREL16_HI, 1141 16, /* rightshift */ 1142 1, /* size (0 = byte, 1 = short, 2 = long) */ 1143 16, /* bitsize */ 1144 FALSE, /* pc_relative */ 1145 0, /* bitpos */ 1146 complain_overflow_dont, /* complain_on_overflow */ 1147 ppc_elf_unhandled_reloc, /* special_function */ 1148 "R_PPC_GOT_DTPREL16_HI", /* name */ 1149 FALSE, /* partial_inplace */ 1150 0, /* src_mask */ 1151 0xffff, /* dst_mask */ 1152 FALSE), /* pcrel_offset */ 1153 1154 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1155 HOWTO (R_PPC_GOT_DTPREL16_HA, 1156 16, /* rightshift */ 1157 1, /* size (0 = byte, 1 = short, 2 = long) */ 1158 16, /* bitsize */ 1159 FALSE, /* pc_relative */ 1160 0, /* bitpos */ 1161 complain_overflow_dont, /* complain_on_overflow */ 1162 ppc_elf_unhandled_reloc, /* special_function */ 1163 "R_PPC_GOT_DTPREL16_HA", /* name */ 1164 FALSE, /* partial_inplace */ 1165 0, /* src_mask */ 1166 0xffff, /* dst_mask */ 1167 FALSE), /* pcrel_offset */ 1168 1169 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1170 offset to the entry. */ 1171 HOWTO (R_PPC_GOT_TPREL16, 1172 0, /* rightshift */ 1173 1, /* size (0 = byte, 1 = short, 2 = long) */ 1174 16, /* bitsize */ 1175 FALSE, /* pc_relative */ 1176 0, /* bitpos */ 1177 complain_overflow_signed, /* complain_on_overflow */ 1178 ppc_elf_unhandled_reloc, /* special_function */ 1179 "R_PPC_GOT_TPREL16", /* name */ 1180 FALSE, /* partial_inplace */ 1181 0, /* src_mask */ 1182 0xffff, /* dst_mask */ 1183 FALSE), /* pcrel_offset */ 1184 1185 /* Like GOT_TPREL16, but no overflow. */ 1186 HOWTO (R_PPC_GOT_TPREL16_LO, 1187 0, /* rightshift */ 1188 1, /* size (0 = byte, 1 = short, 2 = long) */ 1189 16, /* bitsize */ 1190 FALSE, /* pc_relative */ 1191 0, /* bitpos */ 1192 complain_overflow_dont, /* complain_on_overflow */ 1193 ppc_elf_unhandled_reloc, /* special_function */ 1194 "R_PPC_GOT_TPREL16_LO", /* name */ 1195 FALSE, /* partial_inplace */ 1196 0, /* src_mask */ 1197 0xffff, /* dst_mask */ 1198 FALSE), /* pcrel_offset */ 1199 1200 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ 1201 HOWTO (R_PPC_GOT_TPREL16_HI, 1202 16, /* rightshift */ 1203 1, /* size (0 = byte, 1 = short, 2 = long) */ 1204 16, /* bitsize */ 1205 FALSE, /* pc_relative */ 1206 0, /* bitpos */ 1207 complain_overflow_dont, /* complain_on_overflow */ 1208 ppc_elf_unhandled_reloc, /* special_function */ 1209 "R_PPC_GOT_TPREL16_HI", /* name */ 1210 FALSE, /* partial_inplace */ 1211 0, /* src_mask */ 1212 0xffff, /* dst_mask */ 1213 FALSE), /* pcrel_offset */ 1214 1215 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1216 HOWTO (R_PPC_GOT_TPREL16_HA, 1217 16, /* rightshift */ 1218 1, /* size (0 = byte, 1 = short, 2 = long) */ 1219 16, /* bitsize */ 1220 FALSE, /* pc_relative */ 1221 0, /* bitpos */ 1222 complain_overflow_dont, /* complain_on_overflow */ 1223 ppc_elf_unhandled_reloc, /* special_function */ 1224 "R_PPC_GOT_TPREL16_HA", /* name */ 1225 FALSE, /* partial_inplace */ 1226 0, /* src_mask */ 1227 0xffff, /* dst_mask */ 1228 FALSE), /* pcrel_offset */ 1229 1230 /* The remaining relocs are from the Embedded ELF ABI, and are not 1231 in the SVR4 ELF ABI. */ 1232 1233 /* 32 bit value resulting from the addend minus the symbol. */ 1234 HOWTO (R_PPC_EMB_NADDR32, /* type */ 1235 0, /* rightshift */ 1236 2, /* size (0 = byte, 1 = short, 2 = long) */ 1237 32, /* bitsize */ 1238 FALSE, /* pc_relative */ 1239 0, /* bitpos */ 1240 complain_overflow_dont, /* complain_on_overflow */ 1241 bfd_elf_generic_reloc, /* special_function */ 1242 "R_PPC_EMB_NADDR32", /* name */ 1243 FALSE, /* partial_inplace */ 1244 0, /* src_mask */ 1245 0xffffffff, /* dst_mask */ 1246 FALSE), /* pcrel_offset */ 1247 1248 /* 16 bit value resulting from the addend minus the symbol. */ 1249 HOWTO (R_PPC_EMB_NADDR16, /* type */ 1250 0, /* rightshift */ 1251 1, /* size (0 = byte, 1 = short, 2 = long) */ 1252 16, /* bitsize */ 1253 FALSE, /* pc_relative */ 1254 0, /* bitpos */ 1255 complain_overflow_signed, /* complain_on_overflow */ 1256 bfd_elf_generic_reloc, /* special_function */ 1257 "R_PPC_EMB_NADDR16", /* name */ 1258 FALSE, /* partial_inplace */ 1259 0, /* src_mask */ 1260 0xffff, /* dst_mask */ 1261 FALSE), /* pcrel_offset */ 1262 1263 /* 16 bit value resulting from the addend minus the symbol. */ 1264 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ 1265 0, /* rightshift */ 1266 1, /* size (0 = byte, 1 = short, 2 = long) */ 1267 16, /* bitsize */ 1268 FALSE, /* pc_relative */ 1269 0, /* bitpos */ 1270 complain_overflow_dont,/* complain_on_overflow */ 1271 bfd_elf_generic_reloc, /* special_function */ 1272 "R_PPC_EMB_ADDR16_LO", /* name */ 1273 FALSE, /* partial_inplace */ 1274 0, /* src_mask */ 1275 0xffff, /* dst_mask */ 1276 FALSE), /* pcrel_offset */ 1277 1278 /* The high order 16 bits of the addend minus the symbol. */ 1279 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ 1280 16, /* rightshift */ 1281 1, /* size (0 = byte, 1 = short, 2 = long) */ 1282 16, /* bitsize */ 1283 FALSE, /* pc_relative */ 1284 0, /* bitpos */ 1285 complain_overflow_dont, /* complain_on_overflow */ 1286 bfd_elf_generic_reloc, /* special_function */ 1287 "R_PPC_EMB_NADDR16_HI", /* name */ 1288 FALSE, /* partial_inplace */ 1289 0, /* src_mask */ 1290 0xffff, /* dst_mask */ 1291 FALSE), /* pcrel_offset */ 1292 1293 /* The high order 16 bits of the result of the addend minus the address, 1294 plus 1 if the contents of the low 16 bits, treated as a signed number, 1295 is negative. */ 1296 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ 1297 16, /* rightshift */ 1298 1, /* size (0 = byte, 1 = short, 2 = long) */ 1299 16, /* bitsize */ 1300 FALSE, /* pc_relative */ 1301 0, /* bitpos */ 1302 complain_overflow_dont, /* complain_on_overflow */ 1303 ppc_elf_addr16_ha_reloc, /* special_function */ 1304 "R_PPC_EMB_NADDR16_HA", /* name */ 1305 FALSE, /* partial_inplace */ 1306 0, /* src_mask */ 1307 0xffff, /* dst_mask */ 1308 FALSE), /* pcrel_offset */ 1309 1310 /* 16 bit value resulting from allocating a 4 byte word to hold an 1311 address in the .sdata section, and returning the offset from 1312 _SDA_BASE_ for that relocation. */ 1313 HOWTO (R_PPC_EMB_SDAI16, /* type */ 1314 0, /* rightshift */ 1315 1, /* size (0 = byte, 1 = short, 2 = long) */ 1316 16, /* bitsize */ 1317 FALSE, /* pc_relative */ 1318 0, /* bitpos */ 1319 complain_overflow_signed, /* complain_on_overflow */ 1320 bfd_elf_generic_reloc, /* special_function */ 1321 "R_PPC_EMB_SDAI16", /* name */ 1322 FALSE, /* partial_inplace */ 1323 0, /* src_mask */ 1324 0xffff, /* dst_mask */ 1325 FALSE), /* pcrel_offset */ 1326 1327 /* 16 bit value resulting from allocating a 4 byte word to hold an 1328 address in the .sdata2 section, and returning the offset from 1329 _SDA2_BASE_ for that relocation. */ 1330 HOWTO (R_PPC_EMB_SDA2I16, /* type */ 1331 0, /* rightshift */ 1332 1, /* size (0 = byte, 1 = short, 2 = long) */ 1333 16, /* bitsize */ 1334 FALSE, /* pc_relative */ 1335 0, /* bitpos */ 1336 complain_overflow_signed, /* complain_on_overflow */ 1337 bfd_elf_generic_reloc, /* special_function */ 1338 "R_PPC_EMB_SDA2I16", /* name */ 1339 FALSE, /* partial_inplace */ 1340 0, /* src_mask */ 1341 0xffff, /* dst_mask */ 1342 FALSE), /* pcrel_offset */ 1343 1344 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with 1345 small data items. */ 1346 HOWTO (R_PPC_EMB_SDA2REL, /* type */ 1347 0, /* rightshift */ 1348 1, /* size (0 = byte, 1 = short, 2 = long) */ 1349 16, /* bitsize */ 1350 FALSE, /* pc_relative */ 1351 0, /* bitpos */ 1352 complain_overflow_signed, /* complain_on_overflow */ 1353 bfd_elf_generic_reloc, /* special_function */ 1354 "R_PPC_EMB_SDA2REL", /* name */ 1355 FALSE, /* partial_inplace */ 1356 0, /* src_mask */ 1357 0xffff, /* dst_mask */ 1358 FALSE), /* pcrel_offset */ 1359 1360 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit 1361 signed offset from the appropriate base, and filling in the register 1362 field with the appropriate register (0, 2, or 13). */ 1363 HOWTO (R_PPC_EMB_SDA21, /* type */ 1364 0, /* rightshift */ 1365 2, /* size (0 = byte, 1 = short, 2 = long) */ 1366 16, /* bitsize */ 1367 FALSE, /* pc_relative */ 1368 0, /* bitpos */ 1369 complain_overflow_signed, /* complain_on_overflow */ 1370 bfd_elf_generic_reloc, /* special_function */ 1371 "R_PPC_EMB_SDA21", /* name */ 1372 FALSE, /* partial_inplace */ 1373 0, /* src_mask */ 1374 0xffff, /* dst_mask */ 1375 FALSE), /* pcrel_offset */ 1376 1377 /* Relocation not handled: R_PPC_EMB_MRKREF */ 1378 /* Relocation not handled: R_PPC_EMB_RELSEC16 */ 1379 /* Relocation not handled: R_PPC_EMB_RELST_LO */ 1380 /* Relocation not handled: R_PPC_EMB_RELST_HI */ 1381 /* Relocation not handled: R_PPC_EMB_RELST_HA */ 1382 /* Relocation not handled: R_PPC_EMB_BIT_FLD */ 1383 1384 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling 1385 in the 16 bit signed offset from the appropriate base, and filling in the 1386 register field with the appropriate register (0, 2, or 13). */ 1387 HOWTO (R_PPC_EMB_RELSDA, /* type */ 1388 0, /* rightshift */ 1389 1, /* size (0 = byte, 1 = short, 2 = long) */ 1390 16, /* bitsize */ 1391 FALSE, /* pc_relative */ 1392 0, /* bitpos */ 1393 complain_overflow_signed, /* complain_on_overflow */ 1394 bfd_elf_generic_reloc, /* special_function */ 1395 "R_PPC_EMB_RELSDA", /* name */ 1396 FALSE, /* partial_inplace */ 1397 0, /* src_mask */ 1398 0xffff, /* dst_mask */ 1399 FALSE), /* pcrel_offset */ 1400 1401 /* A relative 8 bit branch. */ 1402 HOWTO (R_PPC_VLE_REL8, /* type */ 1403 1, /* rightshift */ 1404 1, /* size (0 = byte, 1 = short, 2 = long) */ 1405 8, /* bitsize */ 1406 TRUE, /* pc_relative */ 1407 0, /* bitpos */ 1408 complain_overflow_signed, /* complain_on_overflow */ 1409 bfd_elf_generic_reloc, /* special_function */ 1410 "R_PPC_VLE_REL8", /* name */ 1411 FALSE, /* partial_inplace */ 1412 0, /* src_mask */ 1413 0xff, /* dst_mask */ 1414 TRUE), /* pcrel_offset */ 1415 1416 /* A relative 15 bit branch. */ 1417 HOWTO (R_PPC_VLE_REL15, /* type */ 1418 1, /* rightshift */ 1419 2, /* size (0 = byte, 1 = short, 2 = long) */ 1420 15, /* bitsize */ 1421 TRUE, /* pc_relative */ 1422 1, /* bitpos */ 1423 complain_overflow_signed, /* complain_on_overflow */ 1424 bfd_elf_generic_reloc, /* special_function */ 1425 "R_PPC_VLE_REL15", /* name */ 1426 FALSE, /* partial_inplace */ 1427 0, /* src_mask */ 1428 0xfe, /* dst_mask */ 1429 TRUE), /* pcrel_offset */ 1430 1431 /* A relative 24 bit branch. */ 1432 HOWTO (R_PPC_VLE_REL24, /* type */ 1433 1, /* rightshift */ 1434 2, /* size (0 = byte, 1 = short, 2 = long) */ 1435 24, /* bitsize */ 1436 TRUE, /* pc_relative */ 1437 1, /* bitpos */ 1438 complain_overflow_signed, /* complain_on_overflow */ 1439 bfd_elf_generic_reloc, /* special_function */ 1440 "R_PPC_VLE_REL24", /* name */ 1441 FALSE, /* partial_inplace */ 1442 0, /* src_mask */ 1443 0x1fffffe, /* dst_mask */ 1444 TRUE), /* pcrel_offset */ 1445 1446 /* The 16 LSBS in split16a format. */ 1447 HOWTO (R_PPC_VLE_LO16A, /* type */ 1448 0, /* rightshift */ 1449 2, /* size (0 = byte, 1 = short, 2 = long) */ 1450 16, /* bitsize */ 1451 FALSE, /* pc_relative */ 1452 0, /* bitpos */ 1453 complain_overflow_dont, /* complain_on_overflow */ 1454 bfd_elf_generic_reloc, /* special_function */ 1455 "R_PPC_VLE_LO16A", /* name */ 1456 FALSE, /* partial_inplace */ 1457 0, /* src_mask */ 1458 0x1f007ff, /* dst_mask */ 1459 FALSE), /* pcrel_offset */ 1460 1461 /* The 16 LSBS in split16d format. */ 1462 HOWTO (R_PPC_VLE_LO16D, /* type */ 1463 0, /* rightshift */ 1464 2, /* size (0 = byte, 1 = short, 2 = long) */ 1465 16, /* bitsize */ 1466 FALSE, /* pc_relative */ 1467 0, /* bitpos */ 1468 complain_overflow_dont, /* complain_on_overflow */ 1469 bfd_elf_generic_reloc, /* special_function */ 1470 "R_PPC_VLE_LO16D", /* name */ 1471 FALSE, /* partial_inplace */ 1472 0, /* src_mask */ 1473 0x1f07ff, /* dst_mask */ 1474 FALSE), /* pcrel_offset */ 1475 1476 /* Bits 16-31 split16a format. */ 1477 HOWTO (R_PPC_VLE_HI16A, /* type */ 1478 16, /* rightshift */ 1479 2, /* size (0 = byte, 1 = short, 2 = long) */ 1480 16, /* bitsize */ 1481 FALSE, /* pc_relative */ 1482 0, /* bitpos */ 1483 complain_overflow_dont, /* complain_on_overflow */ 1484 bfd_elf_generic_reloc, /* special_function */ 1485 "R_PPC_VLE_HI16A", /* name */ 1486 FALSE, /* partial_inplace */ 1487 0, /* src_mask */ 1488 0x1f007ff, /* dst_mask */ 1489 FALSE), /* pcrel_offset */ 1490 1491 /* Bits 16-31 split16d format. */ 1492 HOWTO (R_PPC_VLE_HI16D, /* type */ 1493 16, /* rightshift */ 1494 2, /* size (0 = byte, 1 = short, 2 = long) */ 1495 16, /* bitsize */ 1496 FALSE, /* pc_relative */ 1497 0, /* bitpos */ 1498 complain_overflow_dont, /* complain_on_overflow */ 1499 bfd_elf_generic_reloc, /* special_function */ 1500 "R_PPC_VLE_HI16D", /* name */ 1501 FALSE, /* partial_inplace */ 1502 0, /* src_mask */ 1503 0x1f07ff, /* dst_mask */ 1504 FALSE), /* pcrel_offset */ 1505 1506 /* Bits 16-31 (High Adjusted) in split16a format. */ 1507 HOWTO (R_PPC_VLE_HA16A, /* type */ 1508 16, /* rightshift */ 1509 2, /* size (0 = byte, 1 = short, 2 = long) */ 1510 16, /* bitsize */ 1511 FALSE, /* pc_relative */ 1512 0, /* bitpos */ 1513 complain_overflow_dont, /* complain_on_overflow */ 1514 bfd_elf_generic_reloc, /* special_function */ 1515 "R_PPC_VLE_HA16A", /* name */ 1516 FALSE, /* partial_inplace */ 1517 0, /* src_mask */ 1518 0x1f007ff, /* dst_mask */ 1519 FALSE), /* pcrel_offset */ 1520 1521 /* Bits 16-31 (High Adjusted) in split16d format. */ 1522 HOWTO (R_PPC_VLE_HA16D, /* type */ 1523 16, /* rightshift */ 1524 2, /* size (0 = byte, 1 = short, 2 = long) */ 1525 16, /* bitsize */ 1526 FALSE, /* pc_relative */ 1527 0, /* bitpos */ 1528 complain_overflow_dont, /* complain_on_overflow */ 1529 bfd_elf_generic_reloc, /* special_function */ 1530 "R_PPC_VLE_HA16D", /* name */ 1531 FALSE, /* partial_inplace */ 1532 0, /* src_mask */ 1533 0x1f07ff, /* dst_mask */ 1534 FALSE), /* pcrel_offset */ 1535 1536 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i 1537 instructions. If the register base is 0 then the linker changes 1538 the e_add16i to an e_li instruction. */ 1539 HOWTO (R_PPC_VLE_SDA21, /* type */ 1540 0, /* rightshift */ 1541 2, /* size (0 = byte, 1 = short, 2 = long) */ 1542 16, /* bitsize */ 1543 FALSE, /* pc_relative */ 1544 0, /* bitpos */ 1545 complain_overflow_signed, /* complain_on_overflow */ 1546 bfd_elf_generic_reloc, /* special_function */ 1547 "R_PPC_VLE_SDA21", /* name */ 1548 FALSE, /* partial_inplace */ 1549 0, /* src_mask */ 1550 0xffff, /* dst_mask */ 1551 FALSE), /* pcrel_offset */ 1552 1553 /* Like R_PPC_VLE_SDA21 but ignore overflow. */ 1554 HOWTO (R_PPC_VLE_SDA21_LO, /* type */ 1555 0, /* rightshift */ 1556 2, /* size (0 = byte, 1 = short, 2 = long) */ 1557 16, /* bitsize */ 1558 FALSE, /* pc_relative */ 1559 0, /* bitpos */ 1560 complain_overflow_dont, /* complain_on_overflow */ 1561 bfd_elf_generic_reloc, /* special_function */ 1562 "R_PPC_VLE_SDA21_LO", /* name */ 1563 FALSE, /* partial_inplace */ 1564 0, /* src_mask */ 1565 0xffff, /* dst_mask */ 1566 FALSE), /* pcrel_offset */ 1567 1568 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */ 1569 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */ 1570 0, /* rightshift */ 1571 2, /* size (0 = byte, 1 = short, 2 = long) */ 1572 16, /* bitsize */ 1573 FALSE, /* pc_relative */ 1574 0, /* bitpos */ 1575 complain_overflow_dont, /* complain_on_overflow */ 1576 bfd_elf_generic_reloc, /* special_function */ 1577 "R_PPC_VLE_SDAREL_LO16A", /* name */ 1578 FALSE, /* partial_inplace */ 1579 0, /* src_mask */ 1580 0x1f007ff, /* dst_mask */ 1581 FALSE), /* pcrel_offset */ 1582 1583 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */ 1584 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */ 1585 0, /* rightshift */ 1586 2, /* size (0 = byte, 1 = short, 2 = long) */ 1587 16, /* bitsize */ 1588 FALSE, /* pc_relative */ 1589 0, /* bitpos */ 1590 complain_overflow_dont, /* complain_on_overflow */ 1591 bfd_elf_generic_reloc, /* special_function */ 1592 "R_PPC_VLE_SDAREL_LO16D", /* name */ 1593 FALSE, /* partial_inplace */ 1594 0, /* src_mask */ 1595 0x1f07ff, /* dst_mask */ 1596 FALSE), /* pcrel_offset */ 1597 1598 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */ 1599 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */ 1600 16, /* rightshift */ 1601 2, /* size (0 = byte, 1 = short, 2 = long) */ 1602 16, /* bitsize */ 1603 FALSE, /* pc_relative */ 1604 0, /* bitpos */ 1605 complain_overflow_dont, /* complain_on_overflow */ 1606 bfd_elf_generic_reloc, /* special_function */ 1607 "R_PPC_VLE_SDAREL_HI16A", /* name */ 1608 FALSE, /* partial_inplace */ 1609 0, /* src_mask */ 1610 0x1f007ff, /* dst_mask */ 1611 FALSE), /* pcrel_offset */ 1612 1613 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */ 1614 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */ 1615 16, /* rightshift */ 1616 2, /* size (0 = byte, 1 = short, 2 = long) */ 1617 16, /* bitsize */ 1618 FALSE, /* pc_relative */ 1619 0, /* bitpos */ 1620 complain_overflow_dont, /* complain_on_overflow */ 1621 bfd_elf_generic_reloc, /* special_function */ 1622 "R_PPC_VLE_SDAREL_HI16D", /* name */ 1623 FALSE, /* partial_inplace */ 1624 0, /* src_mask */ 1625 0x1f07ff, /* dst_mask */ 1626 FALSE), /* pcrel_offset */ 1627 1628 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */ 1629 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */ 1630 16, /* rightshift */ 1631 2, /* size (0 = byte, 1 = short, 2 = long) */ 1632 16, /* bitsize */ 1633 FALSE, /* pc_relative */ 1634 0, /* bitpos */ 1635 complain_overflow_dont, /* complain_on_overflow */ 1636 bfd_elf_generic_reloc, /* special_function */ 1637 "R_PPC_VLE_SDAREL_HA16A", /* name */ 1638 FALSE, /* partial_inplace */ 1639 0, /* src_mask */ 1640 0x1f007ff, /* dst_mask */ 1641 FALSE), /* pcrel_offset */ 1642 1643 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */ 1644 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */ 1645 16, /* rightshift */ 1646 2, /* size (0 = byte, 1 = short, 2 = long) */ 1647 16, /* bitsize */ 1648 FALSE, /* pc_relative */ 1649 0, /* bitpos */ 1650 complain_overflow_dont, /* complain_on_overflow */ 1651 bfd_elf_generic_reloc, /* special_function */ 1652 "R_PPC_VLE_SDAREL_HA16D", /* name */ 1653 FALSE, /* partial_inplace */ 1654 0, /* src_mask */ 1655 0x1f07ff, /* dst_mask */ 1656 FALSE), /* pcrel_offset */ 1657 1658 HOWTO (R_PPC_IRELATIVE, /* type */ 1659 0, /* rightshift */ 1660 2, /* size (0 = byte, 1 = short, 2 = long) */ 1661 32, /* bitsize */ 1662 FALSE, /* pc_relative */ 1663 0, /* bitpos */ 1664 complain_overflow_dont, /* complain_on_overflow */ 1665 bfd_elf_generic_reloc, /* special_function */ 1666 "R_PPC_IRELATIVE", /* name */ 1667 FALSE, /* partial_inplace */ 1668 0, /* src_mask */ 1669 0xffffffff, /* dst_mask */ 1670 FALSE), /* pcrel_offset */ 1671 1672 /* A 16 bit relative relocation. */ 1673 HOWTO (R_PPC_REL16, /* type */ 1674 0, /* rightshift */ 1675 1, /* size (0 = byte, 1 = short, 2 = long) */ 1676 16, /* bitsize */ 1677 TRUE, /* pc_relative */ 1678 0, /* bitpos */ 1679 complain_overflow_signed, /* complain_on_overflow */ 1680 bfd_elf_generic_reloc, /* special_function */ 1681 "R_PPC_REL16", /* name */ 1682 FALSE, /* partial_inplace */ 1683 0, /* src_mask */ 1684 0xffff, /* dst_mask */ 1685 TRUE), /* pcrel_offset */ 1686 1687 /* A 16 bit relative relocation without overflow. */ 1688 HOWTO (R_PPC_REL16_LO, /* type */ 1689 0, /* rightshift */ 1690 1, /* size (0 = byte, 1 = short, 2 = long) */ 1691 16, /* bitsize */ 1692 TRUE, /* pc_relative */ 1693 0, /* bitpos */ 1694 complain_overflow_dont,/* complain_on_overflow */ 1695 bfd_elf_generic_reloc, /* special_function */ 1696 "R_PPC_REL16_LO", /* name */ 1697 FALSE, /* partial_inplace */ 1698 0, /* src_mask */ 1699 0xffff, /* dst_mask */ 1700 TRUE), /* pcrel_offset */ 1701 1702 /* The high order 16 bits of a relative address. */ 1703 HOWTO (R_PPC_REL16_HI, /* type */ 1704 16, /* rightshift */ 1705 1, /* size (0 = byte, 1 = short, 2 = long) */ 1706 16, /* bitsize */ 1707 TRUE, /* pc_relative */ 1708 0, /* bitpos */ 1709 complain_overflow_dont, /* complain_on_overflow */ 1710 bfd_elf_generic_reloc, /* special_function */ 1711 "R_PPC_REL16_HI", /* name */ 1712 FALSE, /* partial_inplace */ 1713 0, /* src_mask */ 1714 0xffff, /* dst_mask */ 1715 TRUE), /* pcrel_offset */ 1716 1717 /* The high order 16 bits of a relative address, plus 1 if the contents of 1718 the low 16 bits, treated as a signed number, is negative. */ 1719 HOWTO (R_PPC_REL16_HA, /* type */ 1720 16, /* rightshift */ 1721 1, /* size (0 = byte, 1 = short, 2 = long) */ 1722 16, /* bitsize */ 1723 TRUE, /* pc_relative */ 1724 0, /* bitpos */ 1725 complain_overflow_dont, /* complain_on_overflow */ 1726 ppc_elf_addr16_ha_reloc, /* special_function */ 1727 "R_PPC_REL16_HA", /* name */ 1728 FALSE, /* partial_inplace */ 1729 0, /* src_mask */ 1730 0xffff, /* dst_mask */ 1731 TRUE), /* pcrel_offset */ 1732 1733 /* Like R_PPC_REL16_HA but for split field in addpcis. */ 1734 HOWTO (R_PPC_REL16DX_HA, /* type */ 1735 16, /* rightshift */ 1736 2, /* size (0 = byte, 1 = short, 2 = long) */ 1737 16, /* bitsize */ 1738 TRUE, /* pc_relative */ 1739 0, /* bitpos */ 1740 complain_overflow_signed, /* complain_on_overflow */ 1741 ppc_elf_addr16_ha_reloc, /* special_function */ 1742 "R_PPC_REL16DX_HA", /* name */ 1743 FALSE, /* partial_inplace */ 1744 0, /* src_mask */ 1745 0x1fffc1, /* dst_mask */ 1746 TRUE), /* pcrel_offset */ 1747 1748 /* GNU extension to record C++ vtable hierarchy. */ 1749 HOWTO (R_PPC_GNU_VTINHERIT, /* type */ 1750 0, /* rightshift */ 1751 0, /* size (0 = byte, 1 = short, 2 = long) */ 1752 0, /* bitsize */ 1753 FALSE, /* pc_relative */ 1754 0, /* bitpos */ 1755 complain_overflow_dont, /* complain_on_overflow */ 1756 NULL, /* special_function */ 1757 "R_PPC_GNU_VTINHERIT", /* name */ 1758 FALSE, /* partial_inplace */ 1759 0, /* src_mask */ 1760 0, /* dst_mask */ 1761 FALSE), /* pcrel_offset */ 1762 1763 /* GNU extension to record C++ vtable member usage. */ 1764 HOWTO (R_PPC_GNU_VTENTRY, /* type */ 1765 0, /* rightshift */ 1766 0, /* size (0 = byte, 1 = short, 2 = long) */ 1767 0, /* bitsize */ 1768 FALSE, /* pc_relative */ 1769 0, /* bitpos */ 1770 complain_overflow_dont, /* complain_on_overflow */ 1771 NULL, /* special_function */ 1772 "R_PPC_GNU_VTENTRY", /* name */ 1773 FALSE, /* partial_inplace */ 1774 0, /* src_mask */ 1775 0, /* dst_mask */ 1776 FALSE), /* pcrel_offset */ 1777 1778 /* Phony reloc to handle AIX style TOC entries. */ 1779 HOWTO (R_PPC_TOC16, /* type */ 1780 0, /* rightshift */ 1781 1, /* size (0 = byte, 1 = short, 2 = long) */ 1782 16, /* bitsize */ 1783 FALSE, /* pc_relative */ 1784 0, /* bitpos */ 1785 complain_overflow_signed, /* complain_on_overflow */ 1786 bfd_elf_generic_reloc, /* special_function */ 1787 "R_PPC_TOC16", /* name */ 1788 FALSE, /* partial_inplace */ 1789 0, /* src_mask */ 1790 0xffff, /* dst_mask */ 1791 FALSE), /* pcrel_offset */ 1792}; 1793 1794/* External 32-bit PPC structure for PRPSINFO. This structure is 1795 ABI-defined, thus we choose to use char arrays here in order to 1796 avoid dealing with different types in different architectures. 1797 1798 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while 1799 most non-PPC architectures use `short int'. 1800 1801 This structure will ultimately be written in the corefile's note 1802 section, as the PRPSINFO. */ 1803 1804struct elf_external_ppc_linux_prpsinfo32 1805 { 1806 char pr_state; /* Numeric process state. */ 1807 char pr_sname; /* Char for pr_state. */ 1808 char pr_zomb; /* Zombie. */ 1809 char pr_nice; /* Nice val. */ 1810 char pr_flag[4]; /* Flags. */ 1811 char pr_uid[4]; 1812 char pr_gid[4]; 1813 char pr_pid[4]; 1814 char pr_ppid[4]; 1815 char pr_pgrp[4]; 1816 char pr_sid[4]; 1817 char pr_fname[16]; /* Filename of executable. */ 1818 char pr_psargs[80]; /* Initial part of arg list. */ 1819 }; 1820 1821/* Helper function to copy an elf_internal_linux_prpsinfo in host 1822 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */ 1823 1824static inline void 1825swap_ppc_linux_prpsinfo32_out (bfd *obfd, 1826 const struct elf_internal_linux_prpsinfo *from, 1827 struct elf_external_ppc_linux_prpsinfo32 *to) 1828{ 1829 bfd_put_8 (obfd, from->pr_state, &to->pr_state); 1830 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname); 1831 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb); 1832 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice); 1833 bfd_put_32 (obfd, from->pr_flag, to->pr_flag); 1834 bfd_put_32 (obfd, from->pr_uid, to->pr_uid); 1835 bfd_put_32 (obfd, from->pr_gid, to->pr_gid); 1836 bfd_put_32 (obfd, from->pr_pid, to->pr_pid); 1837 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid); 1838 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp); 1839 bfd_put_32 (obfd, from->pr_sid, to->pr_sid); 1840 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname)); 1841 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs)); 1842} 1843 1844/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ 1845 1846static void 1847ppc_elf_howto_init (void) 1848{ 1849 unsigned int i, type; 1850 1851 for (i = 0; 1852 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 1853 i++) 1854 { 1855 type = ppc_elf_howto_raw[i].type; 1856 if (type >= (sizeof (ppc_elf_howto_table) 1857 / sizeof (ppc_elf_howto_table[0]))) 1858 abort (); 1859 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; 1860 } 1861} 1862 1863static reloc_howto_type * 1864ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1865 bfd_reloc_code_real_type code) 1866{ 1867 enum elf_ppc_reloc_type r; 1868 1869 /* Initialize howto table if not already done. */ 1870 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1871 ppc_elf_howto_init (); 1872 1873 switch (code) 1874 { 1875 default: 1876 return NULL; 1877 1878 case BFD_RELOC_NONE: r = R_PPC_NONE; break; 1879 case BFD_RELOC_32: r = R_PPC_ADDR32; break; 1880 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; 1881 case BFD_RELOC_PPC64_ADDR16_DS: 1882 case BFD_RELOC_16: r = R_PPC_ADDR16; break; 1883 case BFD_RELOC_PPC64_ADDR16_LO_DS: 1884 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; 1885 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; 1886 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; 1887 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; 1888 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; 1889 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; 1890 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; 1891 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; 1892 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; 1893 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; 1894 case BFD_RELOC_PPC64_GOT16_DS: 1895 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; 1896 case BFD_RELOC_PPC64_GOT16_LO_DS: 1897 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; 1898 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; 1899 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; 1900 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; 1901 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; 1902 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; 1903 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; 1904 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; 1905 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; 1906 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; 1907 case BFD_RELOC_PPC64_PLT16_LO_DS: 1908 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; 1909 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; 1910 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; 1911 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; 1912 case BFD_RELOC_PPC64_SECTOFF_DS: 1913 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; 1914 case BFD_RELOC_PPC64_SECTOFF_LO_DS: 1915 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; 1916 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; 1917 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; 1918 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; 1919 case BFD_RELOC_PPC64_TOC16_DS: 1920 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; 1921 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; 1922 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; 1923 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; 1924 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; 1925 case BFD_RELOC_PPC64_TPREL16_DS: 1926 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; 1927 case BFD_RELOC_PPC64_TPREL16_LO_DS: 1928 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; 1929 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; 1930 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; 1931 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; 1932 case BFD_RELOC_PPC64_DTPREL16_DS: 1933 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; 1934 case BFD_RELOC_PPC64_DTPREL16_LO_DS: 1935 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; 1936 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; 1937 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; 1938 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; 1939 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; 1940 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; 1941 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; 1942 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; 1943 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; 1944 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; 1945 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; 1946 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; 1947 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; 1948 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; 1949 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; 1950 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; 1951 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; 1952 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; 1953 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; 1954 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; 1955 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; 1956 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; 1957 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; 1958 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; 1959 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; 1960 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; 1961 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; 1962 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; 1963 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; 1964 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; 1965 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; 1966 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; 1967 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; 1968 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; 1969 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; 1970 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; 1971 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break; 1972 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break; 1973 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break; 1974 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break; 1975 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break; 1976 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break; 1977 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break; 1978 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break; 1979 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break; 1980 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break; 1981 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break; 1982 case BFD_RELOC_PPC_VLE_SDAREL_LO16A: 1983 r = R_PPC_VLE_SDAREL_LO16A; 1984 break; 1985 case BFD_RELOC_PPC_VLE_SDAREL_LO16D: 1986 r = R_PPC_VLE_SDAREL_LO16D; 1987 break; 1988 case BFD_RELOC_PPC_VLE_SDAREL_HI16A: 1989 r = R_PPC_VLE_SDAREL_HI16A; 1990 break; 1991 case BFD_RELOC_PPC_VLE_SDAREL_HI16D: 1992 r = R_PPC_VLE_SDAREL_HI16D; 1993 break; 1994 case BFD_RELOC_PPC_VLE_SDAREL_HA16A: 1995 r = R_PPC_VLE_SDAREL_HA16A; 1996 break; 1997 case BFD_RELOC_PPC_VLE_SDAREL_HA16D: 1998 r = R_PPC_VLE_SDAREL_HA16D; 1999 break; 2000 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; 2001 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; 2002 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; 2003 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; 2004 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break; 2005 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; 2006 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; 2007 } 2008 2009 return ppc_elf_howto_table[r]; 2010}; 2011 2012static reloc_howto_type * 2013ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 2014 const char *r_name) 2015{ 2016 unsigned int i; 2017 2018 for (i = 0; 2019 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 2020 i++) 2021 if (ppc_elf_howto_raw[i].name != NULL 2022 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0) 2023 return &ppc_elf_howto_raw[i]; 2024 2025 return NULL; 2026} 2027 2028/* Set the howto pointer for a PowerPC ELF reloc. */ 2029 2030static void 2031ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 2032 arelent *cache_ptr, 2033 Elf_Internal_Rela *dst) 2034{ 2035 unsigned int r_type; 2036 2037 /* Initialize howto table if not already done. */ 2038 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 2039 ppc_elf_howto_init (); 2040 2041 r_type = ELF32_R_TYPE (dst->r_info); 2042 if (r_type >= R_PPC_max) 2043 { 2044 (*_bfd_error_handler) (_("%B: unrecognised PPC reloc number: %d"), 2045 abfd, r_type); 2046 bfd_set_error (bfd_error_bad_value); 2047 r_type = R_PPC_NONE; 2048 } 2049 cache_ptr->howto = ppc_elf_howto_table[r_type]; 2050 2051 /* Just because the above assert didn't trigger doesn't mean that 2052 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */ 2053 if (!cache_ptr->howto) 2054 { 2055 (*_bfd_error_handler) (_("%B: invalid relocation type %d"), 2056 abfd, r_type); 2057 bfd_set_error (bfd_error_bad_value); 2058 2059 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE]; 2060 } 2061} 2062 2063/* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ 2064 2065static bfd_reloc_status_type 2066ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, 2067 arelent *reloc_entry, 2068 asymbol *symbol, 2069 void *data ATTRIBUTE_UNUSED, 2070 asection *input_section, 2071 bfd *output_bfd, 2072 char **error_message ATTRIBUTE_UNUSED) 2073{ 2074 enum elf_ppc_reloc_type r_type; 2075 long insn; 2076 bfd_size_type octets; 2077 bfd_vma value; 2078 2079 if (output_bfd != NULL) 2080 { 2081 reloc_entry->address += input_section->output_offset; 2082 return bfd_reloc_ok; 2083 } 2084 2085 reloc_entry->addend += 0x8000; 2086 r_type = reloc_entry->howto->type; 2087 if (r_type != R_PPC_REL16DX_HA) 2088 return bfd_reloc_continue; 2089 2090 value = 0; 2091 if (!bfd_is_com_section (symbol->section)) 2092 value = symbol->value; 2093 value += (reloc_entry->addend 2094 + symbol->section->output_offset 2095 + symbol->section->output_section->vma); 2096 value -= (reloc_entry->address 2097 + input_section->output_offset 2098 + input_section->output_section->vma); 2099 value >>= 16; 2100 2101 octets = reloc_entry->address * bfd_octets_per_byte (abfd); 2102 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); 2103 insn &= ~0x1fffc1; 2104 insn |= (value & 0xffc1) | ((value & 0x3e) << 15); 2105 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); 2106 return bfd_reloc_ok; 2107} 2108 2109static bfd_reloc_status_type 2110ppc_elf_unhandled_reloc (bfd *abfd, 2111 arelent *reloc_entry, 2112 asymbol *symbol, 2113 void *data, 2114 asection *input_section, 2115 bfd *output_bfd, 2116 char **error_message) 2117{ 2118 /* If this is a relocatable link (output_bfd test tells us), just 2119 call the generic function. Any adjustment will be done at final 2120 link time. */ 2121 if (output_bfd != NULL) 2122 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2123 input_section, output_bfd, error_message); 2124 2125 if (error_message != NULL) 2126 { 2127 static char buf[60]; 2128 sprintf (buf, _("generic linker can't handle %s"), 2129 reloc_entry->howto->name); 2130 *error_message = buf; 2131 } 2132 return bfd_reloc_dangerous; 2133} 2134 2135/* Sections created by the linker. */ 2136 2137typedef struct elf_linker_section 2138{ 2139 /* Pointer to the bfd section. */ 2140 asection *section; 2141 /* Section name. */ 2142 const char *name; 2143 /* Associated bss section name. */ 2144 const char *bss_name; 2145 /* Associated symbol name. */ 2146 const char *sym_name; 2147 /* Associated symbol. */ 2148 struct elf_link_hash_entry *sym; 2149} elf_linker_section_t; 2150 2151/* Linked list of allocated pointer entries. This hangs off of the 2152 symbol lists, and provides allows us to return different pointers, 2153 based on different addend's. */ 2154 2155typedef struct elf_linker_section_pointers 2156{ 2157 /* next allocated pointer for this symbol */ 2158 struct elf_linker_section_pointers *next; 2159 /* offset of pointer from beginning of section */ 2160 bfd_vma offset; 2161 /* addend used */ 2162 bfd_vma addend; 2163 /* which linker section this is */ 2164 elf_linker_section_t *lsect; 2165} elf_linker_section_pointers_t; 2166 2167struct ppc_elf_obj_tdata 2168{ 2169 struct elf_obj_tdata elf; 2170 2171 /* A mapping from local symbols to offsets into the various linker 2172 sections added. This is index by the symbol index. */ 2173 elf_linker_section_pointers_t **linker_section_pointers; 2174 2175 /* Flags used to auto-detect plt type. */ 2176 unsigned int makes_plt_call : 1; 2177 unsigned int has_rel16 : 1; 2178}; 2179 2180#define ppc_elf_tdata(bfd) \ 2181 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) 2182 2183#define elf_local_ptr_offsets(bfd) \ 2184 (ppc_elf_tdata (bfd)->linker_section_pointers) 2185 2186#define is_ppc_elf(bfd) \ 2187 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 2188 && elf_object_id (bfd) == PPC32_ELF_DATA) 2189 2190/* Override the generic function because we store some extras. */ 2191 2192static bfd_boolean 2193ppc_elf_mkobject (bfd *abfd) 2194{ 2195 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata), 2196 PPC32_ELF_DATA); 2197} 2198 2199/* When defaulting arch/mach, decode apuinfo to find a better match. */ 2200 2201bfd_boolean 2202_bfd_elf_ppc_set_arch (bfd *abfd) 2203{ 2204 unsigned long mach = 0; 2205 asection *s; 2206 unsigned char *contents; 2207 2208 if (abfd->arch_info->bits_per_word == 32 2209 && bfd_big_endian (abfd)) 2210 { 2211 2212 for (s = abfd->sections; s != NULL; s = s->next) 2213 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0) 2214 break; 2215 if (s != NULL) 2216 mach = bfd_mach_ppc_vle; 2217 } 2218 2219 if (mach == 0) 2220 { 2221 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2222 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents)) 2223 { 2224 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4); 2225 unsigned int i; 2226 2227 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4) 2228 { 2229 unsigned int val = bfd_get_32 (abfd, contents + i); 2230 switch (val >> 16) 2231 { 2232 case PPC_APUINFO_PMR: 2233 case PPC_APUINFO_RFMCI: 2234 if (mach == 0) 2235 mach = bfd_mach_ppc_titan; 2236 break; 2237 2238 case PPC_APUINFO_ISEL: 2239 case PPC_APUINFO_CACHELCK: 2240 if (mach == bfd_mach_ppc_titan) 2241 mach = bfd_mach_ppc_e500mc; 2242 break; 2243 2244 case PPC_APUINFO_SPE: 2245 case PPC_APUINFO_EFS: 2246 case PPC_APUINFO_BRLOCK: 2247 if (mach != bfd_mach_ppc_vle) 2248 mach = bfd_mach_ppc_e500; 2249 2250 case PPC_APUINFO_VLE: 2251 mach = bfd_mach_ppc_vle; 2252 break; 2253 2254 default: 2255 mach = -1ul; 2256 } 2257 } 2258 free (contents); 2259 } 2260 } 2261 2262 if (mach != 0 && mach != -1ul) 2263 { 2264 const bfd_arch_info_type *arch; 2265 2266 for (arch = abfd->arch_info->next; arch; arch = arch->next) 2267 if (arch->mach == mach) 2268 { 2269 abfd->arch_info = arch; 2270 break; 2271 } 2272 } 2273 return TRUE; 2274} 2275 2276/* Fix bad default arch selected for a 32 bit input bfd when the 2277 default is 64 bit. Also select arch based on apuinfo. */ 2278 2279static bfd_boolean 2280ppc_elf_object_p (bfd *abfd) 2281{ 2282 if (!abfd->arch_info->the_default) 2283 return TRUE; 2284 2285 if (abfd->arch_info->bits_per_word == 64) 2286 { 2287 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 2288 2289 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) 2290 { 2291 /* Relies on arch after 64 bit default being 32 bit default. */ 2292 abfd->arch_info = abfd->arch_info->next; 2293 BFD_ASSERT (abfd->arch_info->bits_per_word == 32); 2294 } 2295 } 2296 return _bfd_elf_ppc_set_arch (abfd); 2297} 2298 2299/* Function to set whether a module needs the -mrelocatable bit set. */ 2300 2301static bfd_boolean 2302ppc_elf_set_private_flags (bfd *abfd, flagword flags) 2303{ 2304 BFD_ASSERT (!elf_flags_init (abfd) 2305 || elf_elfheader (abfd)->e_flags == flags); 2306 2307 elf_elfheader (abfd)->e_flags = flags; 2308 elf_flags_init (abfd) = TRUE; 2309 return TRUE; 2310} 2311 2312/* Support for core dump NOTE sections. */ 2313 2314static bfd_boolean 2315ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 2316{ 2317 int offset; 2318 unsigned int size; 2319 2320 switch (note->descsz) 2321 { 2322 default: 2323 return FALSE; 2324 2325 case 268: /* Linux/PPC. */ 2326 /* pr_cursig */ 2327 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 2328 2329 /* pr_pid */ 2330 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); 2331 2332 /* pr_reg */ 2333 offset = 72; 2334 size = 192; 2335 2336 break; 2337 } 2338 2339 /* Make a ".reg/999" section. */ 2340 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 2341 size, note->descpos + offset); 2342} 2343 2344static bfd_boolean 2345ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 2346{ 2347 switch (note->descsz) 2348 { 2349 default: 2350 return FALSE; 2351 2352 case 128: /* Linux/PPC elf_prpsinfo. */ 2353 elf_tdata (abfd)->core->pid 2354 = bfd_get_32 (abfd, note->descdata + 16); 2355 elf_tdata (abfd)->core->program 2356 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 2357 elf_tdata (abfd)->core->command 2358 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 2359 } 2360 2361 /* Note that for some reason, a spurious space is tacked 2362 onto the end of the args in some (at least one anyway) 2363 implementations, so strip it off if it exists. */ 2364 2365 { 2366 char *command = elf_tdata (abfd)->core->command; 2367 int n = strlen (command); 2368 2369 if (0 < n && command[n - 1] == ' ') 2370 command[n - 1] = '\0'; 2371 } 2372 2373 return TRUE; 2374} 2375 2376char * 2377elfcore_write_ppc_linux_prpsinfo32 2378 (bfd *abfd, 2379 char *buf, 2380 int *bufsiz, 2381 const struct elf_internal_linux_prpsinfo *prpsinfo) 2382{ 2383 struct elf_external_ppc_linux_prpsinfo32 data; 2384 2385 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data); 2386 return elfcore_write_note (abfd, buf, bufsiz, 2387 "CORE", NT_PRPSINFO, &data, sizeof (data)); 2388} 2389 2390static char * 2391ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) 2392{ 2393 switch (note_type) 2394 { 2395 default: 2396 return NULL; 2397 2398 case NT_PRPSINFO: 2399 { 2400 char data[128]; 2401 va_list ap; 2402 2403 va_start (ap, note_type); 2404 memset (data, 0, sizeof (data)); 2405 strncpy (data + 32, va_arg (ap, const char *), 16); 2406 strncpy (data + 48, va_arg (ap, const char *), 80); 2407 va_end (ap); 2408 return elfcore_write_note (abfd, buf, bufsiz, 2409 "CORE", note_type, data, sizeof (data)); 2410 } 2411 2412 case NT_PRSTATUS: 2413 { 2414 char data[268]; 2415 va_list ap; 2416 long pid; 2417 int cursig; 2418 const void *greg; 2419 2420 va_start (ap, note_type); 2421 memset (data, 0, 72); 2422 pid = va_arg (ap, long); 2423 bfd_put_32 (abfd, pid, data + 24); 2424 cursig = va_arg (ap, int); 2425 bfd_put_16 (abfd, cursig, data + 12); 2426 greg = va_arg (ap, const void *); 2427 memcpy (data + 72, greg, 192); 2428 memset (data + 264, 0, 4); 2429 va_end (ap); 2430 return elfcore_write_note (abfd, buf, bufsiz, 2431 "CORE", note_type, data, sizeof (data)); 2432 } 2433 } 2434} 2435 2436static flagword 2437ppc_elf_lookup_section_flags (char *flag_name) 2438{ 2439 2440 if (!strcmp (flag_name, "SHF_PPC_VLE")) 2441 return SHF_PPC_VLE; 2442 2443 return 0; 2444} 2445 2446/* Add the VLE flag if required. */ 2447 2448bfd_boolean 2449ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr) 2450{ 2451 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle 2452 && (shdr->sh_flags & SHF_EXECINSTR) != 0) 2453 shdr->sh_flags |= SHF_PPC_VLE; 2454 2455 return TRUE; 2456} 2457 2458/* Return address for Ith PLT stub in section PLT, for relocation REL 2459 or (bfd_vma) -1 if it should not be included. */ 2460 2461static bfd_vma 2462ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, 2463 const asection *plt ATTRIBUTE_UNUSED, 2464 const arelent *rel) 2465{ 2466 return rel->address; 2467} 2468 2469/* Handle a PowerPC specific section when reading an object file. This 2470 is called when bfd_section_from_shdr finds a section with an unknown 2471 type. */ 2472 2473static bfd_boolean 2474ppc_elf_section_from_shdr (bfd *abfd, 2475 Elf_Internal_Shdr *hdr, 2476 const char *name, 2477 int shindex) 2478{ 2479 asection *newsect; 2480 flagword flags; 2481 2482 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 2483 return FALSE; 2484 2485 newsect = hdr->bfd_section; 2486 flags = bfd_get_section_flags (abfd, newsect); 2487 if (hdr->sh_flags & SHF_EXCLUDE) 2488 flags |= SEC_EXCLUDE; 2489 2490 if (hdr->sh_type == SHT_ORDERED) 2491 flags |= SEC_SORT_ENTRIES; 2492 2493 bfd_set_section_flags (abfd, newsect, flags); 2494 return TRUE; 2495} 2496 2497/* Set up any other section flags and such that may be necessary. */ 2498 2499static bfd_boolean 2500ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 2501 Elf_Internal_Shdr *shdr, 2502 asection *asect) 2503{ 2504 if ((asect->flags & SEC_SORT_ENTRIES) != 0) 2505 shdr->sh_type = SHT_ORDERED; 2506 2507 return TRUE; 2508} 2509 2510/* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we 2511 need to bump up the number of section headers. */ 2512 2513static int 2514ppc_elf_additional_program_headers (bfd *abfd, 2515 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2516{ 2517 asection *s; 2518 int ret = 0; 2519 2520 s = bfd_get_section_by_name (abfd, ".sbss2"); 2521 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2522 ++ret; 2523 2524 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); 2525 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2526 ++ret; 2527 2528 return ret; 2529} 2530 2531/* Modify the segment map for VLE executables. */ 2532 2533bfd_boolean 2534ppc_elf_modify_segment_map (bfd *abfd, 2535 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2536{ 2537 struct elf_segment_map *m, *n; 2538 bfd_size_type amt; 2539 unsigned int j, k; 2540 bfd_boolean sect0_vle, sectj_vle; 2541 2542 /* At this point in the link, output sections have already been sorted by 2543 LMA and assigned to segments. All that is left to do is to ensure 2544 there is no mixing of VLE & non-VLE sections in a text segment. 2545 If we find that case, we split the segment. 2546 We maintain the original output section order. */ 2547 2548 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 2549 { 2550 if (m->count == 0) 2551 continue; 2552 2553 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0; 2554 for (j = 1; j < m->count; ++j) 2555 { 2556 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0; 2557 2558 if (sectj_vle != sect0_vle) 2559 break; 2560 } 2561 if (j >= m->count) 2562 continue; 2563 2564 /* sections 0..j-1 stay in this (current) segment, 2565 the remainder are put in a new segment. 2566 The scan resumes with the new segment. */ 2567 2568 /* Fix the new segment. */ 2569 amt = sizeof (struct elf_segment_map); 2570 amt += (m->count - j - 1) * sizeof (asection *); 2571 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt); 2572 if (n == NULL) 2573 return FALSE; 2574 2575 n->p_type = PT_LOAD; 2576 n->p_flags = PF_X | PF_R; 2577 if (sectj_vle) 2578 n->p_flags |= PF_PPC_VLE; 2579 n->count = m->count - j; 2580 for (k = 0; k < n->count; ++k) 2581 { 2582 n->sections[k] = m->sections[j+k]; 2583 m->sections[j+k] = NULL; 2584 } 2585 n->next = m->next; 2586 m->next = n; 2587 2588 /* Fix the current segment */ 2589 m->count = j; 2590 } 2591 2592 return TRUE; 2593} 2594 2595/* Add extra PPC sections -- Note, for now, make .sbss2 and 2596 .PPC.EMB.sbss0 a normal section, and not a bss section so 2597 that the linker doesn't crater when trying to make more than 2598 2 sections. */ 2599 2600static const struct bfd_elf_special_section ppc_elf_special_sections[] = 2601{ 2602 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, 2603 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 2604 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2605 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2606 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2607 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, 2608 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 }, 2609 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2610 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2611 { NULL, 0, 0, 0, 0 } 2612}; 2613 2614/* This is what we want for new plt/got. */ 2615static struct bfd_elf_special_section ppc_alt_plt = 2616 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; 2617 2618static const struct bfd_elf_special_section * 2619ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 2620{ 2621 const struct bfd_elf_special_section *ssect; 2622 2623 /* See if this is one of the special sections. */ 2624 if (sec->name == NULL) 2625 return NULL; 2626 2627 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, 2628 sec->use_rela_p); 2629 if (ssect != NULL) 2630 { 2631 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) 2632 ssect = &ppc_alt_plt; 2633 return ssect; 2634 } 2635 2636 return _bfd_elf_get_sec_type_attr (abfd, sec); 2637} 2638 2639/* Very simple linked list structure for recording apuinfo values. */ 2640typedef struct apuinfo_list 2641{ 2642 struct apuinfo_list *next; 2643 unsigned long value; 2644} 2645apuinfo_list; 2646 2647static apuinfo_list *head; 2648static bfd_boolean apuinfo_set; 2649 2650static void 2651apuinfo_list_init (void) 2652{ 2653 head = NULL; 2654 apuinfo_set = FALSE; 2655} 2656 2657static void 2658apuinfo_list_add (unsigned long value) 2659{ 2660 apuinfo_list *entry = head; 2661 2662 while (entry != NULL) 2663 { 2664 if (entry->value == value) 2665 return; 2666 entry = entry->next; 2667 } 2668 2669 entry = bfd_malloc (sizeof (* entry)); 2670 if (entry == NULL) 2671 return; 2672 2673 entry->value = value; 2674 entry->next = head; 2675 head = entry; 2676} 2677 2678static unsigned 2679apuinfo_list_length (void) 2680{ 2681 apuinfo_list *entry; 2682 unsigned long count; 2683 2684 for (entry = head, count = 0; 2685 entry; 2686 entry = entry->next) 2687 ++ count; 2688 2689 return count; 2690} 2691 2692static inline unsigned long 2693apuinfo_list_element (unsigned long number) 2694{ 2695 apuinfo_list * entry; 2696 2697 for (entry = head; 2698 entry && number --; 2699 entry = entry->next) 2700 ; 2701 2702 return entry ? entry->value : 0; 2703} 2704 2705static void 2706apuinfo_list_finish (void) 2707{ 2708 apuinfo_list *entry; 2709 2710 for (entry = head; entry;) 2711 { 2712 apuinfo_list *next = entry->next; 2713 free (entry); 2714 entry = next; 2715 } 2716 2717 head = NULL; 2718} 2719 2720/* Scan the input BFDs and create a linked list of 2721 the APUinfo values that will need to be emitted. */ 2722 2723static void 2724ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) 2725{ 2726 bfd *ibfd; 2727 asection *asec; 2728 char *buffer = NULL; 2729 bfd_size_type largest_input_size = 0; 2730 unsigned i; 2731 unsigned long length; 2732 const char *error_message = NULL; 2733 2734 if (link_info == NULL) 2735 return; 2736 2737 apuinfo_list_init (); 2738 2739 /* Read in the input sections contents. */ 2740 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next) 2741 { 2742 unsigned long datum; 2743 2744 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 2745 if (asec == NULL) 2746 continue; 2747 2748 error_message = _("corrupt %s section in %B"); 2749 length = asec->size; 2750 if (length < 20) 2751 goto fail; 2752 2753 apuinfo_set = TRUE; 2754 if (largest_input_size < asec->size) 2755 { 2756 if (buffer) 2757 free (buffer); 2758 largest_input_size = asec->size; 2759 buffer = bfd_malloc (largest_input_size); 2760 if (!buffer) 2761 return; 2762 } 2763 2764 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 2765 || (bfd_bread (buffer, length, ibfd) != length)) 2766 { 2767 error_message = _("unable to read in %s section from %B"); 2768 goto fail; 2769 } 2770 2771 /* Verify the contents of the header. Note - we have to 2772 extract the values this way in order to allow for a 2773 host whose endian-ness is different from the target. */ 2774 datum = bfd_get_32 (ibfd, buffer); 2775 if (datum != sizeof APUINFO_LABEL) 2776 goto fail; 2777 2778 datum = bfd_get_32 (ibfd, buffer + 8); 2779 if (datum != 0x2) 2780 goto fail; 2781 2782 if (strcmp (buffer + 12, APUINFO_LABEL) != 0) 2783 goto fail; 2784 2785 /* Get the number of bytes used for apuinfo entries. */ 2786 datum = bfd_get_32 (ibfd, buffer + 4); 2787 if (datum + 20 != length) 2788 goto fail; 2789 2790 /* Scan the apuinfo section, building a list of apuinfo numbers. */ 2791 for (i = 0; i < datum; i += 4) 2792 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i)); 2793 } 2794 2795 error_message = NULL; 2796 2797 if (apuinfo_set) 2798 { 2799 /* Compute the size of the output section. */ 2800 unsigned num_entries = apuinfo_list_length (); 2801 2802 /* Set the output section size, if it exists. */ 2803 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2804 2805 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4)) 2806 { 2807 ibfd = abfd; 2808 error_message = _("warning: unable to set size of %s section in %B"); 2809 } 2810 } 2811 2812 fail: 2813 if (buffer) 2814 free (buffer); 2815 2816 if (error_message) 2817 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); 2818} 2819 2820/* Prevent the output section from accumulating the input sections' 2821 contents. We have already stored this in our linked list structure. */ 2822 2823static bfd_boolean 2824ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, 2825 struct bfd_link_info *link_info ATTRIBUTE_UNUSED, 2826 asection *asec, 2827 bfd_byte *contents ATTRIBUTE_UNUSED) 2828{ 2829 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0; 2830} 2831 2832/* Finally we can generate the output section. */ 2833 2834static void 2835ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) 2836{ 2837 bfd_byte *buffer; 2838 asection *asec; 2839 unsigned i; 2840 unsigned num_entries; 2841 bfd_size_type length; 2842 2843 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2844 if (asec == NULL) 2845 return; 2846 2847 if (!apuinfo_set) 2848 return; 2849 2850 length = asec->size; 2851 if (length < 20) 2852 return; 2853 2854 buffer = bfd_malloc (length); 2855 if (buffer == NULL) 2856 { 2857 (*_bfd_error_handler) 2858 (_("failed to allocate space for new APUinfo section.")); 2859 return; 2860 } 2861 2862 /* Create the apuinfo header. */ 2863 num_entries = apuinfo_list_length (); 2864 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); 2865 bfd_put_32 (abfd, num_entries * 4, buffer + 4); 2866 bfd_put_32 (abfd, 0x2, buffer + 8); 2867 strcpy ((char *) buffer + 12, APUINFO_LABEL); 2868 2869 length = 20; 2870 for (i = 0; i < num_entries; i++) 2871 { 2872 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); 2873 length += 4; 2874 } 2875 2876 if (length != asec->size) 2877 (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); 2878 2879 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) 2880 (*_bfd_error_handler) (_("failed to install new APUinfo section.")); 2881 2882 free (buffer); 2883 2884 apuinfo_list_finish (); 2885} 2886 2887static bfd_boolean 2888is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off) 2889{ 2890 bfd_byte buf[GLINK_ENTRY_SIZE]; 2891 2892 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE)) 2893 return FALSE; 2894 2895 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11 2896 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11 2897 && bfd_get_32 (abfd, buf + 8) == MTCTR_11 2898 && bfd_get_32 (abfd, buf + 12) == BCTR); 2899} 2900 2901static bfd_boolean 2902section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) 2903{ 2904 bfd_vma vma = *(bfd_vma *) ptr; 2905 return ((section->flags & SEC_ALLOC) != 0 2906 && section->vma <= vma 2907 && vma < section->vma + section->size); 2908} 2909 2910static long 2911ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms, 2912 long dynsymcount, asymbol **dynsyms, 2913 asymbol **ret) 2914{ 2915 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); 2916 asection *plt, *relplt, *dynamic, *glink; 2917 bfd_vma glink_vma = 0; 2918 bfd_vma resolv_vma = 0; 2919 bfd_vma stub_vma; 2920 asymbol *s; 2921 arelent *p; 2922 long count, i; 2923 size_t size; 2924 char *names; 2925 bfd_byte buf[4]; 2926 2927 *ret = NULL; 2928 2929 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) 2930 return 0; 2931 2932 if (dynsymcount <= 0) 2933 return 0; 2934 2935 relplt = bfd_get_section_by_name (abfd, ".rela.plt"); 2936 if (relplt == NULL) 2937 return 0; 2938 2939 plt = bfd_get_section_by_name (abfd, ".plt"); 2940 if (plt == NULL) 2941 return 0; 2942 2943 /* Call common code to handle old-style executable PLTs. */ 2944 if (elf_section_flags (plt) & SHF_EXECINSTR) 2945 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, 2946 dynsymcount, dynsyms, ret); 2947 2948 /* If this object was prelinked, the prelinker stored the address 2949 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */ 2950 dynamic = bfd_get_section_by_name (abfd, ".dynamic"); 2951 if (dynamic != NULL) 2952 { 2953 bfd_byte *dynbuf, *extdyn, *extdynend; 2954 size_t extdynsize; 2955 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); 2956 2957 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) 2958 return -1; 2959 2960 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; 2961 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; 2962 2963 extdyn = dynbuf; 2964 extdynend = extdyn + dynamic->size; 2965 for (; extdyn < extdynend; extdyn += extdynsize) 2966 { 2967 Elf_Internal_Dyn dyn; 2968 (*swap_dyn_in) (abfd, extdyn, &dyn); 2969 2970 if (dyn.d_tag == DT_NULL) 2971 break; 2972 2973 if (dyn.d_tag == DT_PPC_GOT) 2974 { 2975 unsigned int g_o_t = dyn.d_un.d_val; 2976 asection *got = bfd_get_section_by_name (abfd, ".got"); 2977 if (got != NULL 2978 && bfd_get_section_contents (abfd, got, buf, 2979 g_o_t - got->vma + 4, 4)) 2980 glink_vma = bfd_get_32 (abfd, buf); 2981 break; 2982 } 2983 } 2984 free (dynbuf); 2985 } 2986 2987 /* Otherwise we read the first plt entry. */ 2988 if (glink_vma == 0) 2989 { 2990 if (bfd_get_section_contents (abfd, plt, buf, 0, 4)) 2991 glink_vma = bfd_get_32 (abfd, buf); 2992 } 2993 2994 if (glink_vma == 0) 2995 return 0; 2996 2997 /* The .glink section usually does not survive the final 2998 link; search for the section (usually .text) where the 2999 glink stubs now reside. */ 3000 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma); 3001 if (glink == NULL) 3002 return 0; 3003 3004 /* Determine glink PLT resolver by reading the relative branch 3005 from the first glink stub. */ 3006 if (bfd_get_section_contents (abfd, glink, buf, 3007 glink_vma - glink->vma, 4)) 3008 { 3009 unsigned int insn = bfd_get_32 (abfd, buf); 3010 3011 /* The first glink stub may either branch to the resolver ... */ 3012 insn ^= B; 3013 if ((insn & ~0x3fffffc) == 0) 3014 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000; 3015 3016 /* ... or fall through a bunch of NOPs. */ 3017 else if ((insn ^ B ^ NOP) == 0) 3018 for (i = 4; 3019 bfd_get_section_contents (abfd, glink, buf, 3020 glink_vma - glink->vma + i, 4); 3021 i += 4) 3022 if (bfd_get_32 (abfd, buf) != NOP) 3023 { 3024 resolv_vma = glink_vma + i; 3025 break; 3026 } 3027 } 3028 3029 count = relplt->size / sizeof (Elf32_External_Rela); 3030 /* If the stubs are those for -shared/-pie then we might have 3031 multiple stubs for each plt entry. If that is the case then 3032 there is no way to associate stubs with their plt entries short 3033 of figuring out the GOT pointer value used in the stub. */ 3034 if (!is_nonpic_glink_stub (abfd, glink, 3035 glink_vma - GLINK_ENTRY_SIZE - glink->vma)) 3036 return 0; 3037 3038 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; 3039 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) 3040 return -1; 3041 3042 size = count * sizeof (asymbol); 3043 p = relplt->relocation; 3044 for (i = 0; i < count; i++, p++) 3045 { 3046 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); 3047 if (p->addend != 0) 3048 size += sizeof ("+0x") - 1 + 8; 3049 } 3050 3051 size += sizeof (asymbol) + sizeof ("__glink"); 3052 3053 if (resolv_vma) 3054 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); 3055 3056 s = *ret = bfd_malloc (size); 3057 if (s == NULL) 3058 return -1; 3059 3060 stub_vma = glink_vma; 3061 names = (char *) (s + count + 1 + (resolv_vma != 0)); 3062 p = relplt->relocation + count - 1; 3063 for (i = 0; i < count; i++) 3064 { 3065 size_t len; 3066 3067 *s = **p->sym_ptr_ptr; 3068 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since 3069 we are defining a symbol, ensure one of them is set. */ 3070 if ((s->flags & BSF_LOCAL) == 0) 3071 s->flags |= BSF_GLOBAL; 3072 s->flags |= BSF_SYNTHETIC; 3073 s->section = glink; 3074 stub_vma -= 16; 3075 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0) 3076 stub_vma -= 32; 3077 s->value = stub_vma - glink->vma; 3078 s->name = names; 3079 s->udata.p = NULL; 3080 len = strlen ((*p->sym_ptr_ptr)->name); 3081 memcpy (names, (*p->sym_ptr_ptr)->name, len); 3082 names += len; 3083 if (p->addend != 0) 3084 { 3085 memcpy (names, "+0x", sizeof ("+0x") - 1); 3086 names += sizeof ("+0x") - 1; 3087 bfd_sprintf_vma (abfd, names, p->addend); 3088 names += strlen (names); 3089 } 3090 memcpy (names, "@plt", sizeof ("@plt")); 3091 names += sizeof ("@plt"); 3092 ++s; 3093 --p; 3094 } 3095 3096 /* Add a symbol at the start of the glink branch table. */ 3097 memset (s, 0, sizeof *s); 3098 s->the_bfd = abfd; 3099 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 3100 s->section = glink; 3101 s->value = glink_vma - glink->vma; 3102 s->name = names; 3103 memcpy (names, "__glink", sizeof ("__glink")); 3104 names += sizeof ("__glink"); 3105 s++; 3106 count++; 3107 3108 if (resolv_vma) 3109 { 3110 /* Add a symbol for the glink PLT resolver. */ 3111 memset (s, 0, sizeof *s); 3112 s->the_bfd = abfd; 3113 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 3114 s->section = glink; 3115 s->value = resolv_vma - glink->vma; 3116 s->name = names; 3117 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); 3118 names += sizeof ("__glink_PLTresolve"); 3119 s++; 3120 count++; 3121 } 3122 3123 return count; 3124} 3125 3126/* The following functions are specific to the ELF linker, while 3127 functions above are used generally. They appear in this file more 3128 or less in the order in which they are called. eg. 3129 ppc_elf_check_relocs is called early in the link process, 3130 ppc_elf_finish_dynamic_sections is one of the last functions 3131 called. */ 3132 3133/* Track PLT entries needed for a given symbol. We might need more 3134 than one glink entry per symbol when generating a pic binary. */ 3135struct plt_entry 3136{ 3137 struct plt_entry *next; 3138 3139 /* -fPIC uses multiple GOT sections, one per file, called ".got2". 3140 This field stores the offset into .got2 used to initialise the 3141 GOT pointer reg. It will always be at least 32768. (Current 3142 gcc always uses an offset of 32768, but ld -r will pack .got2 3143 sections together resulting in larger offsets). */ 3144 bfd_vma addend; 3145 3146 /* The .got2 section. */ 3147 asection *sec; 3148 3149 /* PLT refcount or offset. */ 3150 union 3151 { 3152 bfd_signed_vma refcount; 3153 bfd_vma offset; 3154 } plt; 3155 3156 /* .glink stub offset. */ 3157 bfd_vma glink_offset; 3158}; 3159 3160/* Of those relocs that might be copied as dynamic relocs, this function 3161 selects those that must be copied when linking a shared library, 3162 even when the symbol is local. */ 3163 3164static int 3165must_be_dyn_reloc (struct bfd_link_info *info, 3166 enum elf_ppc_reloc_type r_type) 3167{ 3168 switch (r_type) 3169 { 3170 default: 3171 return 1; 3172 3173 case R_PPC_REL24: 3174 case R_PPC_REL14: 3175 case R_PPC_REL14_BRTAKEN: 3176 case R_PPC_REL14_BRNTAKEN: 3177 case R_PPC_REL32: 3178 return 0; 3179 3180 case R_PPC_TPREL32: 3181 case R_PPC_TPREL16: 3182 case R_PPC_TPREL16_LO: 3183 case R_PPC_TPREL16_HI: 3184 case R_PPC_TPREL16_HA: 3185 return !bfd_link_executable (info); 3186 } 3187} 3188 3189/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 3190 copying dynamic variables from a shared lib into an app's dynbss 3191 section, and instead use a dynamic relocation to point into the 3192 shared lib. */ 3193#define ELIMINATE_COPY_RELOCS 1 3194 3195/* Used to track dynamic relocations for local symbols. */ 3196struct ppc_dyn_relocs 3197{ 3198 struct ppc_dyn_relocs *next; 3199 3200 /* The input section of the reloc. */ 3201 asection *sec; 3202 3203 /* Total number of relocs copied for the input section. */ 3204 unsigned int count : 31; 3205 3206 /* Whether this entry is for STT_GNU_IFUNC symbols. */ 3207 unsigned int ifunc : 1; 3208}; 3209 3210/* PPC ELF linker hash entry. */ 3211 3212struct ppc_elf_link_hash_entry 3213{ 3214 struct elf_link_hash_entry elf; 3215 3216 /* If this symbol is used in the linker created sections, the processor 3217 specific backend uses this field to map the field into the offset 3218 from the beginning of the section. */ 3219 elf_linker_section_pointers_t *linker_section_pointer; 3220 3221 /* Track dynamic relocs copied for this symbol. */ 3222 struct elf_dyn_relocs *dyn_relocs; 3223 3224 /* Contexts in which symbol is used in the GOT (or TOC). 3225 TLS_GD .. TLS_TLS bits are or'd into the mask as the 3226 corresponding relocs are encountered during check_relocs. 3227 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 3228 indicate the corresponding GOT entry type is not needed. */ 3229#define TLS_GD 1 /* GD reloc. */ 3230#define TLS_LD 2 /* LD reloc. */ 3231#define TLS_TPREL 4 /* TPREL reloc, => IE. */ 3232#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 3233#define TLS_TLS 16 /* Any TLS reloc. */ 3234#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ 3235#define PLT_IFUNC 64 /* STT_GNU_IFUNC. */ 3236 char tls_mask; 3237 3238 /* Nonzero if we have seen a small data relocation referring to this 3239 symbol. */ 3240 unsigned char has_sda_refs : 1; 3241 3242 /* Flag use of given relocations. */ 3243 unsigned char has_addr16_ha : 1; 3244 unsigned char has_addr16_lo : 1; 3245}; 3246 3247#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) 3248 3249/* PPC ELF linker hash table. */ 3250 3251struct ppc_elf_link_hash_table 3252{ 3253 struct elf_link_hash_table elf; 3254 3255 /* Various options passed from the linker. */ 3256 struct ppc_elf_params *params; 3257 3258 /* Short-cuts to get to dynamic linker sections. */ 3259 asection *got; 3260 asection *relgot; 3261 asection *glink; 3262 asection *plt; 3263 asection *relplt; 3264 asection *iplt; 3265 asection *reliplt; 3266 asection *dynbss; 3267 asection *relbss; 3268 asection *dynsbss; 3269 asection *relsbss; 3270 elf_linker_section_t sdata[2]; 3271 asection *sbss; 3272 asection *glink_eh_frame; 3273 3274 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ 3275 asection *srelplt2; 3276 3277 /* The .got.plt section (VxWorks only)*/ 3278 asection *sgotplt; 3279 3280 /* Shortcut to __tls_get_addr. */ 3281 struct elf_link_hash_entry *tls_get_addr; 3282 3283 /* The bfd that forced an old-style PLT. */ 3284 bfd *old_bfd; 3285 3286 /* TLS local dynamic got entry handling. */ 3287 union { 3288 bfd_signed_vma refcount; 3289 bfd_vma offset; 3290 } tlsld_got; 3291 3292 /* Offset of branch table to PltResolve function in glink. */ 3293 bfd_vma glink_pltresolve; 3294 3295 /* Size of reserved GOT entries. */ 3296 unsigned int got_header_size; 3297 /* Non-zero if allocating the header left a gap. */ 3298 unsigned int got_gap; 3299 3300 /* The type of PLT we have chosen to use. */ 3301 enum ppc_elf_plt_type plt_type; 3302 3303 /* True if the target system is VxWorks. */ 3304 unsigned int is_vxworks:1; 3305 3306 /* The size of PLT entries. */ 3307 int plt_entry_size; 3308 /* The distance between adjacent PLT slots. */ 3309 int plt_slot_size; 3310 /* The size of the first PLT entry. */ 3311 int plt_initial_entry_size; 3312 3313 /* Small local sym cache. */ 3314 struct sym_cache sym_cache; 3315}; 3316 3317/* Rename some of the generic section flags to better document how they 3318 are used for ppc32. The flags are only valid for ppc32 elf objects. */ 3319 3320/* Nonzero if this section has TLS related relocations. */ 3321#define has_tls_reloc sec_flg0 3322 3323/* Nonzero if this section has a call to __tls_get_addr. */ 3324#define has_tls_get_addr_call sec_flg1 3325 3326/* Get the PPC ELF linker hash table from a link_info structure. */ 3327 3328#define ppc_elf_hash_table(p) \ 3329 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 3330 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL) 3331 3332/* Create an entry in a PPC ELF linker hash table. */ 3333 3334static struct bfd_hash_entry * 3335ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 3336 struct bfd_hash_table *table, 3337 const char *string) 3338{ 3339 /* Allocate the structure if it has not already been allocated by a 3340 subclass. */ 3341 if (entry == NULL) 3342 { 3343 entry = bfd_hash_allocate (table, 3344 sizeof (struct ppc_elf_link_hash_entry)); 3345 if (entry == NULL) 3346 return entry; 3347 } 3348 3349 /* Call the allocation method of the superclass. */ 3350 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 3351 if (entry != NULL) 3352 { 3353 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; 3354 ppc_elf_hash_entry (entry)->dyn_relocs = NULL; 3355 ppc_elf_hash_entry (entry)->tls_mask = 0; 3356 ppc_elf_hash_entry (entry)->has_sda_refs = 0; 3357 } 3358 3359 return entry; 3360} 3361 3362/* Create a PPC ELF linker hash table. */ 3363 3364static struct bfd_link_hash_table * 3365ppc_elf_link_hash_table_create (bfd *abfd) 3366{ 3367 struct ppc_elf_link_hash_table *ret; 3368 static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12, 0 }; 3369 3370 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); 3371 if (ret == NULL) 3372 return NULL; 3373 3374 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, 3375 ppc_elf_link_hash_newfunc, 3376 sizeof (struct ppc_elf_link_hash_entry), 3377 PPC32_ELF_DATA)) 3378 { 3379 free (ret); 3380 return NULL; 3381 } 3382 3383 ret->elf.init_plt_refcount.refcount = 0; 3384 ret->elf.init_plt_refcount.glist = NULL; 3385 ret->elf.init_plt_offset.offset = 0; 3386 ret->elf.init_plt_offset.glist = NULL; 3387 3388 ret->params = &default_params; 3389 3390 ret->sdata[0].name = ".sdata"; 3391 ret->sdata[0].sym_name = "_SDA_BASE_"; 3392 ret->sdata[0].bss_name = ".sbss"; 3393 3394 ret->sdata[1].name = ".sdata2"; 3395 ret->sdata[1].sym_name = "_SDA2_BASE_"; 3396 ret->sdata[1].bss_name = ".sbss2"; 3397 3398 ret->plt_entry_size = 12; 3399 ret->plt_slot_size = 8; 3400 ret->plt_initial_entry_size = 72; 3401 3402 return &ret->elf.root; 3403} 3404 3405/* Hook linker params into hash table. */ 3406 3407void 3408ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params) 3409{ 3410 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3411 3412 if (htab) 3413 htab->params = params; 3414} 3415 3416/* Create .got and the related sections. */ 3417 3418static bfd_boolean 3419ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) 3420{ 3421 struct ppc_elf_link_hash_table *htab; 3422 asection *s; 3423 flagword flags; 3424 3425 if (!_bfd_elf_create_got_section (abfd, info)) 3426 return FALSE; 3427 3428 htab = ppc_elf_hash_table (info); 3429 htab->got = s = bfd_get_linker_section (abfd, ".got"); 3430 if (s == NULL) 3431 abort (); 3432 3433 if (htab->is_vxworks) 3434 { 3435 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt"); 3436 if (!htab->sgotplt) 3437 abort (); 3438 } 3439 else 3440 { 3441 /* The powerpc .got has a blrl instruction in it. Mark it 3442 executable. */ 3443 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS 3444 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3445 if (!bfd_set_section_flags (abfd, s, flags)) 3446 return FALSE; 3447 } 3448 3449 htab->relgot = bfd_get_linker_section (abfd, ".rela.got"); 3450 if (!htab->relgot) 3451 abort (); 3452 3453 return TRUE; 3454} 3455 3456/* Create a special linker section, used for R_PPC_EMB_SDAI16 and 3457 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata 3458 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */ 3459 3460static bfd_boolean 3461ppc_elf_create_linker_section (bfd *abfd, 3462 struct bfd_link_info *info, 3463 flagword flags, 3464 elf_linker_section_t *lsect) 3465{ 3466 asection *s; 3467 3468 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3469 | SEC_LINKER_CREATED); 3470 3471 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags); 3472 if (s == NULL) 3473 return FALSE; 3474 lsect->section = s; 3475 3476 /* Define the sym on the first section of this name. */ 3477 s = bfd_get_section_by_name (abfd, lsect->name); 3478 3479 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name); 3480 if (lsect->sym == NULL) 3481 return FALSE; 3482 lsect->sym->root.u.def.value = 0x8000; 3483 return TRUE; 3484} 3485 3486static bfd_boolean 3487ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info) 3488{ 3489 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3490 asection *s; 3491 flagword flags; 3492 3493 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS 3494 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3495 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags); 3496 htab->glink = s; 3497 if (s == NULL 3498 || !bfd_set_section_alignment (abfd, s, 3499 htab->params->ppc476_workaround ? 6 : 4)) 3500 return FALSE; 3501 3502 if (!info->no_ld_generated_unwind_info) 3503 { 3504 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3505 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3506 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags); 3507 htab->glink_eh_frame = s; 3508 if (s == NULL 3509 || !bfd_set_section_alignment (abfd, s, 2)) 3510 return FALSE; 3511 } 3512 3513 flags = SEC_ALLOC | SEC_LINKER_CREATED; 3514 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags); 3515 htab->iplt = s; 3516 if (s == NULL 3517 || !bfd_set_section_alignment (abfd, s, 4)) 3518 return FALSE; 3519 3520 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3521 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3522 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags); 3523 htab->reliplt = s; 3524 if (s == NULL 3525 || ! bfd_set_section_alignment (abfd, s, 2)) 3526 return FALSE; 3527 3528 if (!ppc_elf_create_linker_section (abfd, info, 0, 3529 &htab->sdata[0])) 3530 return FALSE; 3531 3532 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY, 3533 &htab->sdata[1])) 3534 return FALSE; 3535 3536 return TRUE; 3537} 3538 3539/* We have to create .dynsbss and .rela.sbss here so that they get mapped 3540 to output sections (just like _bfd_elf_create_dynamic_sections has 3541 to create .dynbss and .rela.bss). */ 3542 3543static bfd_boolean 3544ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 3545{ 3546 struct ppc_elf_link_hash_table *htab; 3547 asection *s; 3548 flagword flags; 3549 3550 htab = ppc_elf_hash_table (info); 3551 3552 if (htab->got == NULL 3553 && !ppc_elf_create_got (abfd, info)) 3554 return FALSE; 3555 3556 if (!_bfd_elf_create_dynamic_sections (abfd, info)) 3557 return FALSE; 3558 3559 if (htab->glink == NULL 3560 && !ppc_elf_create_glink (abfd, info)) 3561 return FALSE; 3562 3563 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss"); 3564 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss", 3565 SEC_ALLOC | SEC_LINKER_CREATED); 3566 htab->dynsbss = s; 3567 if (s == NULL) 3568 return FALSE; 3569 3570 if (! bfd_link_pic (info)) 3571 { 3572 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss"); 3573 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3574 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3575 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags); 3576 htab->relsbss = s; 3577 if (s == NULL 3578 || ! bfd_set_section_alignment (abfd, s, 2)) 3579 return FALSE; 3580 } 3581 3582 if (htab->is_vxworks 3583 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) 3584 return FALSE; 3585 3586 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt"); 3587 htab->plt = s = bfd_get_linker_section (abfd, ".plt"); 3588 if (s == NULL) 3589 abort (); 3590 3591 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; 3592 if (htab->plt_type == PLT_VXWORKS) 3593 /* The VxWorks PLT is a loaded section with contents. */ 3594 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; 3595 return bfd_set_section_flags (abfd, s, flags); 3596} 3597 3598/* Copy the extra info we tack onto an elf_link_hash_entry. */ 3599 3600static void 3601ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, 3602 struct elf_link_hash_entry *dir, 3603 struct elf_link_hash_entry *ind) 3604{ 3605 struct ppc_elf_link_hash_entry *edir, *eind; 3606 3607 edir = (struct ppc_elf_link_hash_entry *) dir; 3608 eind = (struct ppc_elf_link_hash_entry *) ind; 3609 3610 edir->tls_mask |= eind->tls_mask; 3611 edir->has_sda_refs |= eind->has_sda_refs; 3612 3613 /* If called to transfer flags for a weakdef during processing 3614 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 3615 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 3616 if (!(ELIMINATE_COPY_RELOCS 3617 && eind->elf.root.type != bfd_link_hash_indirect 3618 && edir->elf.dynamic_adjusted)) 3619 edir->elf.non_got_ref |= eind->elf.non_got_ref; 3620 3621 edir->elf.ref_dynamic |= eind->elf.ref_dynamic; 3622 edir->elf.ref_regular |= eind->elf.ref_regular; 3623 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; 3624 edir->elf.needs_plt |= eind->elf.needs_plt; 3625 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; 3626 3627 if (eind->dyn_relocs != NULL) 3628 { 3629 if (edir->dyn_relocs != NULL) 3630 { 3631 struct elf_dyn_relocs **pp; 3632 struct elf_dyn_relocs *p; 3633 3634 /* Add reloc counts against the indirect sym to the direct sym 3635 list. Merge any entries against the same section. */ 3636 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 3637 { 3638 struct elf_dyn_relocs *q; 3639 3640 for (q = edir->dyn_relocs; q != NULL; q = q->next) 3641 if (q->sec == p->sec) 3642 { 3643 q->pc_count += p->pc_count; 3644 q->count += p->count; 3645 *pp = p->next; 3646 break; 3647 } 3648 if (q == NULL) 3649 pp = &p->next; 3650 } 3651 *pp = edir->dyn_relocs; 3652 } 3653 3654 edir->dyn_relocs = eind->dyn_relocs; 3655 eind->dyn_relocs = NULL; 3656 } 3657 3658 /* If we were called to copy over info for a weak sym, that's all. 3659 You might think dyn_relocs need not be copied over; After all, 3660 both syms will be dynamic or both non-dynamic so we're just 3661 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS 3662 code in ppc_elf_adjust_dynamic_symbol needs to check for 3663 dyn_relocs in read-only sections, and it does so on what is the 3664 DIR sym here. */ 3665 if (eind->elf.root.type != bfd_link_hash_indirect) 3666 return; 3667 3668 /* Copy over the GOT refcount entries that we may have already seen to 3669 the symbol which just became indirect. */ 3670 edir->elf.got.refcount += eind->elf.got.refcount; 3671 eind->elf.got.refcount = 0; 3672 3673 /* And plt entries. */ 3674 if (eind->elf.plt.plist != NULL) 3675 { 3676 if (edir->elf.plt.plist != NULL) 3677 { 3678 struct plt_entry **entp; 3679 struct plt_entry *ent; 3680 3681 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) 3682 { 3683 struct plt_entry *dent; 3684 3685 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) 3686 if (dent->sec == ent->sec && dent->addend == ent->addend) 3687 { 3688 dent->plt.refcount += ent->plt.refcount; 3689 *entp = ent->next; 3690 break; 3691 } 3692 if (dent == NULL) 3693 entp = &ent->next; 3694 } 3695 *entp = edir->elf.plt.plist; 3696 } 3697 3698 edir->elf.plt.plist = eind->elf.plt.plist; 3699 eind->elf.plt.plist = NULL; 3700 } 3701 3702 if (eind->elf.dynindx != -1) 3703 { 3704 if (edir->elf.dynindx != -1) 3705 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 3706 edir->elf.dynstr_index); 3707 edir->elf.dynindx = eind->elf.dynindx; 3708 edir->elf.dynstr_index = eind->elf.dynstr_index; 3709 eind->elf.dynindx = -1; 3710 eind->elf.dynstr_index = 0; 3711 } 3712} 3713 3714/* Hook called by the linker routine which adds symbols from an object 3715 file. We use it to put .comm items in .sbss, and not .bss. */ 3716 3717static bfd_boolean 3718ppc_elf_add_symbol_hook (bfd *abfd, 3719 struct bfd_link_info *info, 3720 Elf_Internal_Sym *sym, 3721 const char **namep ATTRIBUTE_UNUSED, 3722 flagword *flagsp ATTRIBUTE_UNUSED, 3723 asection **secp, 3724 bfd_vma *valp) 3725{ 3726 if (sym->st_shndx == SHN_COMMON 3727 && !bfd_link_relocatable (info) 3728 && is_ppc_elf (info->output_bfd) 3729 && sym->st_size <= elf_gp_size (abfd)) 3730 { 3731 /* Common symbols less than or equal to -G nn bytes are automatically 3732 put into .sbss. */ 3733 struct ppc_elf_link_hash_table *htab; 3734 3735 htab = ppc_elf_hash_table (info); 3736 if (htab->sbss == NULL) 3737 { 3738 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; 3739 3740 if (!htab->elf.dynobj) 3741 htab->elf.dynobj = abfd; 3742 3743 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 3744 ".sbss", 3745 flags); 3746 if (htab->sbss == NULL) 3747 return FALSE; 3748 } 3749 3750 *secp = htab->sbss; 3751 *valp = sym->st_size; 3752 } 3753 3754 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC 3755 && (abfd->flags & DYNAMIC) == 0 3756 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) 3757 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; 3758 3759 return TRUE; 3760} 3761 3762/* Find a linker generated pointer with a given addend and type. */ 3763 3764static elf_linker_section_pointers_t * 3765elf_find_pointer_linker_section 3766 (elf_linker_section_pointers_t *linker_pointers, 3767 bfd_vma addend, 3768 elf_linker_section_t *lsect) 3769{ 3770 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) 3771 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) 3772 return linker_pointers; 3773 3774 return NULL; 3775} 3776 3777/* Allocate a pointer to live in a linker created section. */ 3778 3779static bfd_boolean 3780elf_allocate_pointer_linker_section (bfd *abfd, 3781 elf_linker_section_t *lsect, 3782 struct elf_link_hash_entry *h, 3783 const Elf_Internal_Rela *rel) 3784{ 3785 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; 3786 elf_linker_section_pointers_t *linker_section_ptr; 3787 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 3788 bfd_size_type amt; 3789 3790 BFD_ASSERT (lsect != NULL); 3791 3792 /* Is this a global symbol? */ 3793 if (h != NULL) 3794 { 3795 struct ppc_elf_link_hash_entry *eh; 3796 3797 /* Has this symbol already been allocated? If so, our work is done. */ 3798 eh = (struct ppc_elf_link_hash_entry *) h; 3799 if (elf_find_pointer_linker_section (eh->linker_section_pointer, 3800 rel->r_addend, 3801 lsect)) 3802 return TRUE; 3803 3804 ptr_linker_section_ptr = &eh->linker_section_pointer; 3805 } 3806 else 3807 { 3808 BFD_ASSERT (is_ppc_elf (abfd)); 3809 3810 /* Allocation of a pointer to a local symbol. */ 3811 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); 3812 3813 /* Allocate a table to hold the local symbols if first time. */ 3814 if (!ptr) 3815 { 3816 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info; 3817 3818 amt = num_symbols; 3819 amt *= sizeof (elf_linker_section_pointers_t *); 3820 ptr = bfd_zalloc (abfd, amt); 3821 3822 if (!ptr) 3823 return FALSE; 3824 3825 elf_local_ptr_offsets (abfd) = ptr; 3826 } 3827 3828 /* Has this symbol already been allocated? If so, our work is done. */ 3829 if (elf_find_pointer_linker_section (ptr[r_symndx], 3830 rel->r_addend, 3831 lsect)) 3832 return TRUE; 3833 3834 ptr_linker_section_ptr = &ptr[r_symndx]; 3835 } 3836 3837 /* Allocate space for a pointer in the linker section, and allocate 3838 a new pointer record from internal memory. */ 3839 BFD_ASSERT (ptr_linker_section_ptr != NULL); 3840 amt = sizeof (elf_linker_section_pointers_t); 3841 linker_section_ptr = bfd_alloc (abfd, amt); 3842 3843 if (!linker_section_ptr) 3844 return FALSE; 3845 3846 linker_section_ptr->next = *ptr_linker_section_ptr; 3847 linker_section_ptr->addend = rel->r_addend; 3848 linker_section_ptr->lsect = lsect; 3849 *ptr_linker_section_ptr = linker_section_ptr; 3850 3851 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2)) 3852 return FALSE; 3853 linker_section_ptr->offset = lsect->section->size; 3854 lsect->section->size += 4; 3855 3856#ifdef DEBUG 3857 fprintf (stderr, 3858 "Create pointer in linker section %s, offset = %ld, section size = %ld\n", 3859 lsect->name, (long) linker_section_ptr->offset, 3860 (long) lsect->section->size); 3861#endif 3862 3863 return TRUE; 3864} 3865 3866static struct plt_entry ** 3867update_local_sym_info (bfd *abfd, 3868 Elf_Internal_Shdr *symtab_hdr, 3869 unsigned long r_symndx, 3870 int tls_type) 3871{ 3872 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 3873 struct plt_entry **local_plt; 3874 char *local_got_tls_masks; 3875 3876 if (local_got_refcounts == NULL) 3877 { 3878 bfd_size_type size = symtab_hdr->sh_info; 3879 3880 size *= (sizeof (*local_got_refcounts) 3881 + sizeof (*local_plt) 3882 + sizeof (*local_got_tls_masks)); 3883 local_got_refcounts = bfd_zalloc (abfd, size); 3884 if (local_got_refcounts == NULL) 3885 return NULL; 3886 elf_local_got_refcounts (abfd) = local_got_refcounts; 3887 } 3888 3889 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info); 3890 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info); 3891 local_got_tls_masks[r_symndx] |= tls_type; 3892 if (tls_type != PLT_IFUNC) 3893 local_got_refcounts[r_symndx] += 1; 3894 return local_plt + r_symndx; 3895} 3896 3897static bfd_boolean 3898update_plt_info (bfd *abfd, struct plt_entry **plist, 3899 asection *sec, bfd_vma addend) 3900{ 3901 struct plt_entry *ent; 3902 3903 if (addend < 32768) 3904 sec = NULL; 3905 for (ent = *plist; ent != NULL; ent = ent->next) 3906 if (ent->sec == sec && ent->addend == addend) 3907 break; 3908 if (ent == NULL) 3909 { 3910 bfd_size_type amt = sizeof (*ent); 3911 ent = bfd_alloc (abfd, amt); 3912 if (ent == NULL) 3913 return FALSE; 3914 ent->next = *plist; 3915 ent->sec = sec; 3916 ent->addend = addend; 3917 ent->plt.refcount = 0; 3918 *plist = ent; 3919 } 3920 ent->plt.refcount += 1; 3921 return TRUE; 3922} 3923 3924static struct plt_entry * 3925find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend) 3926{ 3927 struct plt_entry *ent; 3928 3929 if (addend < 32768) 3930 sec = NULL; 3931 for (ent = *plist; ent != NULL; ent = ent->next) 3932 if (ent->sec == sec && ent->addend == addend) 3933 break; 3934 return ent; 3935} 3936 3937static bfd_boolean 3938is_branch_reloc (enum elf_ppc_reloc_type r_type) 3939{ 3940 return (r_type == R_PPC_PLTREL24 3941 || r_type == R_PPC_LOCAL24PC 3942 || r_type == R_PPC_REL24 3943 || r_type == R_PPC_REL14 3944 || r_type == R_PPC_REL14_BRTAKEN 3945 || r_type == R_PPC_REL14_BRNTAKEN 3946 || r_type == R_PPC_ADDR24 3947 || r_type == R_PPC_ADDR14 3948 || r_type == R_PPC_ADDR14_BRTAKEN 3949 || r_type == R_PPC_ADDR14_BRNTAKEN); 3950} 3951 3952static void 3953bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) 3954{ 3955 (*_bfd_error_handler) 3956 (_("%B: relocation %s cannot be used when making a shared object"), 3957 abfd, 3958 ppc_elf_howto_table[r_type]->name); 3959 bfd_set_error (bfd_error_bad_value); 3960} 3961 3962/* Look through the relocs for a section during the first phase, and 3963 allocate space in the global offset table or procedure linkage 3964 table. */ 3965 3966static bfd_boolean 3967ppc_elf_check_relocs (bfd *abfd, 3968 struct bfd_link_info *info, 3969 asection *sec, 3970 const Elf_Internal_Rela *relocs) 3971{ 3972 struct ppc_elf_link_hash_table *htab; 3973 Elf_Internal_Shdr *symtab_hdr; 3974 struct elf_link_hash_entry **sym_hashes; 3975 const Elf_Internal_Rela *rel; 3976 const Elf_Internal_Rela *rel_end; 3977 asection *got2, *sreloc; 3978 struct elf_link_hash_entry *tga; 3979 3980 if (bfd_link_relocatable (info)) 3981 return TRUE; 3982 3983 /* Don't do anything special with non-loaded, non-alloced sections. 3984 In particular, any relocs in such sections should not affect GOT 3985 and PLT reference counting (ie. we don't allow them to create GOT 3986 or PLT entries), there's no possibility or desire to optimize TLS 3987 relocs, and there's not much point in propagating relocs to shared 3988 libs that the dynamic linker won't relocate. */ 3989 if ((sec->flags & SEC_ALLOC) == 0) 3990 return TRUE; 3991 3992#ifdef DEBUG 3993 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", 3994 sec, abfd); 3995#endif 3996 3997 BFD_ASSERT (is_ppc_elf (abfd)); 3998 3999 /* Initialize howto table if not already done. */ 4000 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 4001 ppc_elf_howto_init (); 4002 4003 htab = ppc_elf_hash_table (info); 4004 if (htab->glink == NULL) 4005 { 4006 if (htab->elf.dynobj == NULL) 4007 htab->elf.dynobj = abfd; 4008 if (!ppc_elf_create_glink (htab->elf.dynobj, info)) 4009 return FALSE; 4010 } 4011 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 4012 FALSE, FALSE, TRUE); 4013 symtab_hdr = &elf_symtab_hdr (abfd); 4014 sym_hashes = elf_sym_hashes (abfd); 4015 got2 = bfd_get_section_by_name (abfd, ".got2"); 4016 sreloc = NULL; 4017 4018 rel_end = relocs + sec->reloc_count; 4019 for (rel = relocs; rel < rel_end; rel++) 4020 { 4021 unsigned long r_symndx; 4022 enum elf_ppc_reloc_type r_type; 4023 struct elf_link_hash_entry *h; 4024 int tls_type; 4025 struct plt_entry **ifunc; 4026 4027 r_symndx = ELF32_R_SYM (rel->r_info); 4028 if (r_symndx < symtab_hdr->sh_info) 4029 h = NULL; 4030 else 4031 { 4032 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4033 while (h->root.type == bfd_link_hash_indirect 4034 || h->root.type == bfd_link_hash_warning) 4035 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4036 4037 /* PR15323, ref flags aren't set for references in the same 4038 object. */ 4039 h->root.non_ir_ref = 1; 4040 } 4041 4042 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. 4043 This shows up in particular in an R_PPC_ADDR32 in the eabi 4044 startup code. */ 4045 if (h != NULL 4046 && htab->got == NULL 4047 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 4048 { 4049 if (htab->elf.dynobj == NULL) 4050 htab->elf.dynobj = abfd; 4051 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 4052 return FALSE; 4053 BFD_ASSERT (h == htab->elf.hgot); 4054 } 4055 4056 tls_type = 0; 4057 r_type = ELF32_R_TYPE (rel->r_info); 4058 ifunc = NULL; 4059 if (h == NULL && !htab->is_vxworks) 4060 { 4061 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4062 abfd, r_symndx); 4063 if (isym == NULL) 4064 return FALSE; 4065 4066 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 4067 { 4068 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */ 4069 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, 4070 PLT_IFUNC); 4071 if (ifunc == NULL) 4072 return FALSE; 4073 4074 /* STT_GNU_IFUNC symbols must have a PLT entry; 4075 In a non-pie executable even when there are 4076 no plt calls. */ 4077 if (!bfd_link_pic (info) 4078 || is_branch_reloc (r_type)) 4079 { 4080 bfd_vma addend = 0; 4081 if (r_type == R_PPC_PLTREL24) 4082 { 4083 ppc_elf_tdata (abfd)->makes_plt_call = 1; 4084 if (bfd_link_pic (info)) 4085 addend = rel->r_addend; 4086 } 4087 if (!update_plt_info (abfd, ifunc, got2, addend)) 4088 return FALSE; 4089 } 4090 } 4091 } 4092 4093 if (!htab->is_vxworks 4094 && is_branch_reloc (r_type) 4095 && h != NULL 4096 && h == tga) 4097 { 4098 if (rel != relocs 4099 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD 4100 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) 4101 /* We have a new-style __tls_get_addr call with a marker 4102 reloc. */ 4103 ; 4104 else 4105 /* Mark this section as having an old-style call. */ 4106 sec->has_tls_get_addr_call = 1; 4107 } 4108 4109 switch ((int)r_type) 4110 { 4111 case R_PPC_TLSGD: 4112 case R_PPC_TLSLD: 4113 /* These special tls relocs tie a call to __tls_get_addr with 4114 its parameter symbol. */ 4115 break; 4116 4117 case R_PPC_GOT_TLSLD16: 4118 case R_PPC_GOT_TLSLD16_LO: 4119 case R_PPC_GOT_TLSLD16_HI: 4120 case R_PPC_GOT_TLSLD16_HA: 4121 tls_type = TLS_TLS | TLS_LD; 4122 goto dogottls; 4123 4124 case R_PPC_GOT_TLSGD16: 4125 case R_PPC_GOT_TLSGD16_LO: 4126 case R_PPC_GOT_TLSGD16_HI: 4127 case R_PPC_GOT_TLSGD16_HA: 4128 tls_type = TLS_TLS | TLS_GD; 4129 goto dogottls; 4130 4131 case R_PPC_GOT_TPREL16: 4132 case R_PPC_GOT_TPREL16_LO: 4133 case R_PPC_GOT_TPREL16_HI: 4134 case R_PPC_GOT_TPREL16_HA: 4135 if (bfd_link_pic (info)) 4136 info->flags |= DF_STATIC_TLS; 4137 tls_type = TLS_TLS | TLS_TPREL; 4138 goto dogottls; 4139 4140 case R_PPC_GOT_DTPREL16: 4141 case R_PPC_GOT_DTPREL16_LO: 4142 case R_PPC_GOT_DTPREL16_HI: 4143 case R_PPC_GOT_DTPREL16_HA: 4144 tls_type = TLS_TLS | TLS_DTPREL; 4145 dogottls: 4146 sec->has_tls_reloc = 1; 4147 /* Fall thru */ 4148 4149 /* GOT16 relocations */ 4150 case R_PPC_GOT16: 4151 case R_PPC_GOT16_LO: 4152 case R_PPC_GOT16_HI: 4153 case R_PPC_GOT16_HA: 4154 /* This symbol requires a global offset table entry. */ 4155 if (htab->got == NULL) 4156 { 4157 if (htab->elf.dynobj == NULL) 4158 htab->elf.dynobj = abfd; 4159 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 4160 return FALSE; 4161 } 4162 if (h != NULL) 4163 { 4164 h->got.refcount += 1; 4165 ppc_elf_hash_entry (h)->tls_mask |= tls_type; 4166 } 4167 else 4168 /* This is a global offset table entry for a local symbol. */ 4169 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) 4170 return FALSE; 4171 4172 /* We may also need a plt entry if the symbol turns out to be 4173 an ifunc. */ 4174 if (h != NULL && !bfd_link_pic (info)) 4175 { 4176 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4177 return FALSE; 4178 } 4179 break; 4180 4181 /* Indirect .sdata relocation. */ 4182 case R_PPC_EMB_SDAI16: 4183 if (bfd_link_pic (info)) 4184 { 4185 bad_shared_reloc (abfd, r_type); 4186 return FALSE; 4187 } 4188 htab->sdata[0].sym->ref_regular = 1; 4189 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0], 4190 h, rel)) 4191 return FALSE; 4192 if (h != NULL) 4193 { 4194 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4195 h->non_got_ref = TRUE; 4196 } 4197 break; 4198 4199 /* Indirect .sdata2 relocation. */ 4200 case R_PPC_EMB_SDA2I16: 4201 if (bfd_link_pic (info)) 4202 { 4203 bad_shared_reloc (abfd, r_type); 4204 return FALSE; 4205 } 4206 htab->sdata[1].sym->ref_regular = 1; 4207 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1], 4208 h, rel)) 4209 return FALSE; 4210 if (h != NULL) 4211 { 4212 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4213 h->non_got_ref = TRUE; 4214 } 4215 break; 4216 4217 case R_PPC_SDAREL16: 4218 htab->sdata[0].sym->ref_regular = 1; 4219 /* Fall thru */ 4220 4221 case R_PPC_VLE_SDAREL_LO16A: 4222 case R_PPC_VLE_SDAREL_LO16D: 4223 case R_PPC_VLE_SDAREL_HI16A: 4224 case R_PPC_VLE_SDAREL_HI16D: 4225 case R_PPC_VLE_SDAREL_HA16A: 4226 case R_PPC_VLE_SDAREL_HA16D: 4227 if (h != NULL) 4228 { 4229 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4230 h->non_got_ref = TRUE; 4231 } 4232 break; 4233 4234 case R_PPC_VLE_REL8: 4235 case R_PPC_VLE_REL15: 4236 case R_PPC_VLE_REL24: 4237 case R_PPC_VLE_LO16A: 4238 case R_PPC_VLE_LO16D: 4239 case R_PPC_VLE_HI16A: 4240 case R_PPC_VLE_HI16D: 4241 case R_PPC_VLE_HA16A: 4242 case R_PPC_VLE_HA16D: 4243 break; 4244 4245 case R_PPC_EMB_SDA2REL: 4246 if (bfd_link_pic (info)) 4247 { 4248 bad_shared_reloc (abfd, r_type); 4249 return FALSE; 4250 } 4251 htab->sdata[1].sym->ref_regular = 1; 4252 if (h != NULL) 4253 { 4254 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4255 h->non_got_ref = TRUE; 4256 } 4257 break; 4258 4259 case R_PPC_VLE_SDA21_LO: 4260 case R_PPC_VLE_SDA21: 4261 case R_PPC_EMB_SDA21: 4262 case R_PPC_EMB_RELSDA: 4263 if (bfd_link_pic (info)) 4264 { 4265 bad_shared_reloc (abfd, r_type); 4266 return FALSE; 4267 } 4268 if (h != NULL) 4269 { 4270 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4271 h->non_got_ref = TRUE; 4272 } 4273 break; 4274 4275 case R_PPC_EMB_NADDR32: 4276 case R_PPC_EMB_NADDR16: 4277 case R_PPC_EMB_NADDR16_LO: 4278 case R_PPC_EMB_NADDR16_HI: 4279 case R_PPC_EMB_NADDR16_HA: 4280 if (bfd_link_pic (info)) 4281 { 4282 bad_shared_reloc (abfd, r_type); 4283 return FALSE; 4284 } 4285 if (h != NULL) 4286 h->non_got_ref = TRUE; 4287 break; 4288 4289 case R_PPC_PLTREL24: 4290 if (h == NULL) 4291 break; 4292 /* Fall through */ 4293 case R_PPC_PLT32: 4294 case R_PPC_PLTREL32: 4295 case R_PPC_PLT16_LO: 4296 case R_PPC_PLT16_HI: 4297 case R_PPC_PLT16_HA: 4298#ifdef DEBUG 4299 fprintf (stderr, "Reloc requires a PLT entry\n"); 4300#endif 4301 /* This symbol requires a procedure linkage table entry. */ 4302 if (h == NULL) 4303 { 4304 if (ifunc == NULL) 4305 { 4306 /* It does not make sense to have a procedure linkage 4307 table entry for a non-ifunc local symbol. */ 4308 info->callbacks->einfo 4309 (_("%P: %H: %s reloc against local symbol\n"), 4310 abfd, sec, rel->r_offset, 4311 ppc_elf_howto_table[r_type]->name); 4312 bfd_set_error (bfd_error_bad_value); 4313 return FALSE; 4314 } 4315 } 4316 else 4317 { 4318 bfd_vma addend = 0; 4319 4320 if (r_type == R_PPC_PLTREL24) 4321 { 4322 ppc_elf_tdata (abfd)->makes_plt_call = 1; 4323 if (bfd_link_pic (info)) 4324 addend = rel->r_addend; 4325 } 4326 h->needs_plt = 1; 4327 if (!update_plt_info (abfd, &h->plt.plist, got2, addend)) 4328 return FALSE; 4329 } 4330 break; 4331 4332 /* The following relocations don't need to propagate the 4333 relocation if linking a shared object since they are 4334 section relative. */ 4335 case R_PPC_SECTOFF: 4336 case R_PPC_SECTOFF_LO: 4337 case R_PPC_SECTOFF_HI: 4338 case R_PPC_SECTOFF_HA: 4339 case R_PPC_DTPREL16: 4340 case R_PPC_DTPREL16_LO: 4341 case R_PPC_DTPREL16_HI: 4342 case R_PPC_DTPREL16_HA: 4343 case R_PPC_TOC16: 4344 break; 4345 4346 case R_PPC_REL16: 4347 case R_PPC_REL16_LO: 4348 case R_PPC_REL16_HI: 4349 case R_PPC_REL16_HA: 4350 case R_PPC_REL16DX_HA: 4351 ppc_elf_tdata (abfd)->has_rel16 = 1; 4352 break; 4353 4354 /* These are just markers. */ 4355 case R_PPC_TLS: 4356 case R_PPC_EMB_MRKREF: 4357 case R_PPC_NONE: 4358 case R_PPC_max: 4359 case R_PPC_RELAX: 4360 case R_PPC_RELAX_PLT: 4361 case R_PPC_RELAX_PLTREL24: 4362 break; 4363 4364 /* These should only appear in dynamic objects. */ 4365 case R_PPC_COPY: 4366 case R_PPC_GLOB_DAT: 4367 case R_PPC_JMP_SLOT: 4368 case R_PPC_RELATIVE: 4369 case R_PPC_IRELATIVE: 4370 break; 4371 4372 /* These aren't handled yet. We'll report an error later. */ 4373 case R_PPC_ADDR30: 4374 case R_PPC_EMB_RELSEC16: 4375 case R_PPC_EMB_RELST_LO: 4376 case R_PPC_EMB_RELST_HI: 4377 case R_PPC_EMB_RELST_HA: 4378 case R_PPC_EMB_BIT_FLD: 4379 break; 4380 4381 /* This refers only to functions defined in the shared library. */ 4382 case R_PPC_LOCAL24PC: 4383 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) 4384 { 4385 htab->plt_type = PLT_OLD; 4386 htab->old_bfd = abfd; 4387 } 4388 if (h != NULL && h->type == STT_GNU_IFUNC) 4389 { 4390 if (bfd_link_pic (info)) 4391 { 4392 info->callbacks->einfo 4393 (_("%P: %H: @local call to ifunc %s\n"), 4394 abfd, sec, rel->r_offset, 4395 h->root.root.string); 4396 bfd_set_error (bfd_error_bad_value); 4397 return FALSE; 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 4650/* Merge object attributes from IBFD into OBFD. Raise an error if 4651 there are conflicting attributes. */ 4652static bfd_boolean 4653ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd) 4654{ 4655 obj_attribute *in_attr, *in_attrs; 4656 obj_attribute *out_attr, *out_attrs; 4657 4658 if (!elf_known_obj_attributes_proc (obfd)[0].i) 4659 { 4660 /* This is the first object. Copy the attributes. */ 4661 _bfd_elf_copy_obj_attributes (ibfd, obfd); 4662 4663 /* Use the Tag_null value to indicate the attributes have been 4664 initialized. */ 4665 elf_known_obj_attributes_proc (obfd)[0].i = 1; 4666 4667 return TRUE; 4668 } 4669 4670 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; 4671 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; 4672 4673 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge 4674 non-conflicting ones. */ 4675 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP]; 4676 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP]; 4677 if (in_attr->i != out_attr->i) 4678 { 4679 out_attr->type = 1; 4680 if (out_attr->i == 0) 4681 out_attr->i = in_attr->i; 4682 else if (in_attr->i == 0) 4683 ; 4684 else if (out_attr->i == 1 && in_attr->i == 2) 4685 _bfd_error_handler 4686 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd); 4687 else if (out_attr->i == 1 && in_attr->i == 3) 4688 _bfd_error_handler 4689 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), 4690 obfd, ibfd); 4691 else if (out_attr->i == 3 && in_attr->i == 1) 4692 _bfd_error_handler 4693 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), 4694 ibfd, obfd); 4695 else if (out_attr->i == 3 && in_attr->i == 2) 4696 _bfd_error_handler 4697 (_("Warning: %B uses soft float, %B uses single-precision hard float"), 4698 ibfd, obfd); 4699 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3)) 4700 _bfd_error_handler 4701 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd); 4702 else if (in_attr->i > 3) 4703 _bfd_error_handler 4704 (_("Warning: %B uses unknown floating point ABI %d"), ibfd, 4705 in_attr->i); 4706 else 4707 _bfd_error_handler 4708 (_("Warning: %B uses unknown floating point ABI %d"), obfd, 4709 out_attr->i); 4710 } 4711 4712 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and 4713 merge non-conflicting ones. */ 4714 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector]; 4715 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector]; 4716 if (in_attr->i != out_attr->i) 4717 { 4718 const char *in_abi = NULL, *out_abi = NULL; 4719 4720 switch (in_attr->i) 4721 { 4722 case 1: in_abi = "generic"; break; 4723 case 2: in_abi = "AltiVec"; break; 4724 case 3: in_abi = "SPE"; break; 4725 } 4726 4727 switch (out_attr->i) 4728 { 4729 case 1: out_abi = "generic"; break; 4730 case 2: out_abi = "AltiVec"; break; 4731 case 3: out_abi = "SPE"; break; 4732 } 4733 4734 out_attr->type = 1; 4735 if (out_attr->i == 0) 4736 out_attr->i = in_attr->i; 4737 else if (in_attr->i == 0) 4738 ; 4739 /* For now, allow generic to transition to AltiVec or SPE 4740 without a warning. If GCC marked files with their stack 4741 alignment and used don't-care markings for files which are 4742 not affected by the vector ABI, we could warn about this 4743 case too. */ 4744 else if (out_attr->i == 1) 4745 out_attr->i = in_attr->i; 4746 else if (in_attr->i == 1) 4747 ; 4748 else if (in_abi == NULL) 4749 _bfd_error_handler 4750 (_("Warning: %B uses unknown vector ABI %d"), ibfd, 4751 in_attr->i); 4752 else if (out_abi == NULL) 4753 _bfd_error_handler 4754 (_("Warning: %B uses unknown vector ABI %d"), obfd, 4755 in_attr->i); 4756 else 4757 _bfd_error_handler 4758 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""), 4759 ibfd, obfd, in_abi, out_abi); 4760 } 4761 4762 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes 4763 and merge non-conflicting ones. */ 4764 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4765 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4766 if (in_attr->i != out_attr->i) 4767 { 4768 out_attr->type = 1; 4769 if (out_attr->i == 0) 4770 out_attr->i = in_attr->i; 4771 else if (in_attr->i == 0) 4772 ; 4773 else if (out_attr->i == 1 && in_attr->i == 2) 4774 _bfd_error_handler 4775 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd); 4776 else if (out_attr->i == 2 && in_attr->i == 1) 4777 _bfd_error_handler 4778 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd); 4779 else if (in_attr->i > 2) 4780 _bfd_error_handler 4781 (_("Warning: %B uses unknown small structure return convention %d"), ibfd, 4782 in_attr->i); 4783 else 4784 _bfd_error_handler 4785 (_("Warning: %B uses unknown small structure return convention %d"), obfd, 4786 out_attr->i); 4787 } 4788 4789 /* Merge Tag_compatibility attributes and any common GNU ones. */ 4790 _bfd_elf_merge_object_attributes (ibfd, obfd); 4791 4792 return TRUE; 4793} 4794 4795/* Merge backend specific data from an object file to the output 4796 object file when linking. */ 4797 4798static bfd_boolean 4799ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4800{ 4801 flagword old_flags; 4802 flagword new_flags; 4803 bfd_boolean error; 4804 4805 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd)) 4806 return TRUE; 4807 4808 /* Check if we have the same endianness. */ 4809 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 4810 return FALSE; 4811 4812 if (!ppc_elf_merge_obj_attributes (ibfd, obfd)) 4813 return FALSE; 4814 4815 new_flags = elf_elfheader (ibfd)->e_flags; 4816 old_flags = elf_elfheader (obfd)->e_flags; 4817 if (!elf_flags_init (obfd)) 4818 { 4819 /* First call, no flags set. */ 4820 elf_flags_init (obfd) = TRUE; 4821 elf_elfheader (obfd)->e_flags = new_flags; 4822 } 4823 4824 /* Compatible flags are ok. */ 4825 else if (new_flags == old_flags) 4826 ; 4827 4828 /* Incompatible flags. */ 4829 else 4830 { 4831 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib 4832 to be linked with either. */ 4833 error = FALSE; 4834 if ((new_flags & EF_PPC_RELOCATABLE) != 0 4835 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) 4836 { 4837 error = TRUE; 4838 (*_bfd_error_handler) 4839 (_("%B: compiled with -mrelocatable and linked with " 4840 "modules compiled normally"), ibfd); 4841 } 4842 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 4843 && (old_flags & EF_PPC_RELOCATABLE) != 0) 4844 { 4845 error = TRUE; 4846 (*_bfd_error_handler) 4847 (_("%B: compiled normally and linked with " 4848 "modules compiled with -mrelocatable"), ibfd); 4849 } 4850 4851 /* The output is -mrelocatable-lib iff both the input files are. */ 4852 if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) 4853 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; 4854 4855 /* The output is -mrelocatable iff it can't be -mrelocatable-lib, 4856 but each input file is either -mrelocatable or -mrelocatable-lib. */ 4857 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) 4858 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) 4859 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) 4860 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; 4861 4862 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if 4863 any module uses it. */ 4864 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); 4865 4866 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4867 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4868 4869 /* Warn about any other mismatches. */ 4870 if (new_flags != old_flags) 4871 { 4872 error = TRUE; 4873 (*_bfd_error_handler) 4874 (_("%B: uses different e_flags (0x%lx) fields " 4875 "than previous modules (0x%lx)"), 4876 ibfd, (long) new_flags, (long) old_flags); 4877 } 4878 4879 if (error) 4880 { 4881 bfd_set_error (bfd_error_bad_value); 4882 return FALSE; 4883 } 4884 } 4885 4886 return TRUE; 4887} 4888 4889static void 4890ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc, 4891 bfd_vma value, 4892 split16_format_type split16_format) 4893 4894{ 4895 unsigned int insn, top5; 4896 4897 insn = bfd_get_32 (output_bfd, loc); 4898 top5 = value & 0xf800; 4899 top5 = top5 << (split16_format == split16a_type ? 9 : 5); 4900 insn |= top5; 4901 insn |= value & 0x7ff; 4902 bfd_put_32 (output_bfd, insn, loc); 4903} 4904 4905 4906/* Choose which PLT scheme to use, and set .plt flags appropriately. 4907 Returns -1 on error, 0 for old PLT, 1 for new PLT. */ 4908int 4909ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, 4910 struct bfd_link_info *info) 4911{ 4912 struct ppc_elf_link_hash_table *htab; 4913 flagword flags; 4914 4915 htab = ppc_elf_hash_table (info); 4916 4917 if (htab->plt_type == PLT_UNSET) 4918 { 4919 struct elf_link_hash_entry *h; 4920 4921 if (htab->params->plt_style == PLT_OLD) 4922 htab->plt_type = PLT_OLD; 4923 else if (bfd_link_pic (info) 4924 && htab->elf.dynamic_sections_created 4925 && (h = elf_link_hash_lookup (&htab->elf, "_mcount", 4926 FALSE, FALSE, TRUE)) != NULL 4927 && (h->type == STT_FUNC 4928 || h->needs_plt) 4929 && h->ref_regular 4930 && !(SYMBOL_CALLS_LOCAL (info, h) 4931 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 4932 && h->root.type == bfd_link_hash_undefweak))) 4933 { 4934 /* Profiling of shared libs (and pies) is not supported with 4935 secure plt, because ppc32 does profiling before a 4936 function prologue and a secure plt pic call stubs needs 4937 r30 to be set up. */ 4938 htab->plt_type = PLT_OLD; 4939 } 4940 else 4941 { 4942 bfd *ibfd; 4943 enum ppc_elf_plt_type plt_type = htab->params->plt_style; 4944 4945 /* Look through the reloc flags left by ppc_elf_check_relocs. 4946 Use the old style bss plt if a file makes plt calls 4947 without using the new relocs, and if ld isn't given 4948 --secure-plt and we never see REL16 relocs. */ 4949 if (plt_type == PLT_UNSET) 4950 plt_type = PLT_OLD; 4951 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) 4952 if (is_ppc_elf (ibfd)) 4953 { 4954 if (ppc_elf_tdata (ibfd)->has_rel16) 4955 plt_type = PLT_NEW; 4956 else if (ppc_elf_tdata (ibfd)->makes_plt_call) 4957 { 4958 plt_type = PLT_OLD; 4959 htab->old_bfd = ibfd; 4960 break; 4961 } 4962 } 4963 htab->plt_type = plt_type; 4964 } 4965 } 4966 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW) 4967 { 4968 if (htab->old_bfd != NULL) 4969 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"), 4970 htab->old_bfd); 4971 else 4972 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n")); 4973 } 4974 4975 BFD_ASSERT (htab->plt_type != PLT_VXWORKS); 4976 4977 if (htab->plt_type == PLT_NEW) 4978 { 4979 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 4980 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 4981 4982 /* The new PLT is a loaded section. */ 4983 if (htab->plt != NULL 4984 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags)) 4985 return -1; 4986 4987 /* The new GOT is not executable. */ 4988 if (htab->got != NULL 4989 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags)) 4990 return -1; 4991 } 4992 else 4993 { 4994 /* Stop an unused .glink section from affecting .text alignment. */ 4995 if (htab->glink != NULL 4996 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) 4997 return -1; 4998 } 4999 return htab->plt_type == PLT_NEW; 5000} 5001 5002/* Return the section that should be marked against GC for a given 5003 relocation. */ 5004 5005static asection * 5006ppc_elf_gc_mark_hook (asection *sec, 5007 struct bfd_link_info *info, 5008 Elf_Internal_Rela *rel, 5009 struct elf_link_hash_entry *h, 5010 Elf_Internal_Sym *sym) 5011{ 5012 if (h != NULL) 5013 switch (ELF32_R_TYPE (rel->r_info)) 5014 { 5015 case R_PPC_GNU_VTINHERIT: 5016 case R_PPC_GNU_VTENTRY: 5017 return NULL; 5018 } 5019 5020 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 5021} 5022 5023/* Update the got, plt and dynamic reloc reference counts for the 5024 section being removed. */ 5025 5026static bfd_boolean 5027ppc_elf_gc_sweep_hook (bfd *abfd, 5028 struct bfd_link_info *info, 5029 asection *sec, 5030 const Elf_Internal_Rela *relocs) 5031{ 5032 struct ppc_elf_link_hash_table *htab; 5033 Elf_Internal_Shdr *symtab_hdr; 5034 struct elf_link_hash_entry **sym_hashes; 5035 bfd_signed_vma *local_got_refcounts; 5036 const Elf_Internal_Rela *rel, *relend; 5037 asection *got2; 5038 5039 if (bfd_link_relocatable (info)) 5040 return TRUE; 5041 5042 if ((sec->flags & SEC_ALLOC) == 0) 5043 return TRUE; 5044 5045 elf_section_data (sec)->local_dynrel = NULL; 5046 5047 htab = ppc_elf_hash_table (info); 5048 symtab_hdr = &elf_symtab_hdr (abfd); 5049 sym_hashes = elf_sym_hashes (abfd); 5050 local_got_refcounts = elf_local_got_refcounts (abfd); 5051 got2 = bfd_get_section_by_name (abfd, ".got2"); 5052 5053 relend = relocs + sec->reloc_count; 5054 for (rel = relocs; rel < relend; rel++) 5055 { 5056 unsigned long r_symndx; 5057 enum elf_ppc_reloc_type r_type; 5058 struct elf_link_hash_entry *h = NULL; 5059 5060 r_symndx = ELF32_R_SYM (rel->r_info); 5061 if (r_symndx >= symtab_hdr->sh_info) 5062 { 5063 struct elf_dyn_relocs **pp, *p; 5064 struct ppc_elf_link_hash_entry *eh; 5065 5066 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5067 while (h->root.type == bfd_link_hash_indirect 5068 || h->root.type == bfd_link_hash_warning) 5069 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5070 eh = (struct ppc_elf_link_hash_entry *) h; 5071 5072 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 5073 if (p->sec == sec) 5074 { 5075 /* Everything must go for SEC. */ 5076 *pp = p->next; 5077 break; 5078 } 5079 } 5080 5081 r_type = ELF32_R_TYPE (rel->r_info); 5082 if (!htab->is_vxworks 5083 && h == NULL 5084 && local_got_refcounts != NULL 5085 && (!bfd_link_pic (info) 5086 || is_branch_reloc (r_type))) 5087 { 5088 struct plt_entry **local_plt = (struct plt_entry **) 5089 (local_got_refcounts + symtab_hdr->sh_info); 5090 char *local_got_tls_masks = (char *) 5091 (local_plt + symtab_hdr->sh_info); 5092 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) 5093 { 5094 struct plt_entry **ifunc = local_plt + r_symndx; 5095 bfd_vma addend = 0; 5096 struct plt_entry *ent; 5097 5098 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 5099 addend = rel->r_addend; 5100 ent = find_plt_ent (ifunc, got2, addend); 5101 if (ent->plt.refcount > 0) 5102 ent->plt.refcount -= 1; 5103 continue; 5104 } 5105 } 5106 5107 switch (r_type) 5108 { 5109 case R_PPC_GOT_TLSLD16: 5110 case R_PPC_GOT_TLSLD16_LO: 5111 case R_PPC_GOT_TLSLD16_HI: 5112 case R_PPC_GOT_TLSLD16_HA: 5113 case R_PPC_GOT_TLSGD16: 5114 case R_PPC_GOT_TLSGD16_LO: 5115 case R_PPC_GOT_TLSGD16_HI: 5116 case R_PPC_GOT_TLSGD16_HA: 5117 case R_PPC_GOT_TPREL16: 5118 case R_PPC_GOT_TPREL16_LO: 5119 case R_PPC_GOT_TPREL16_HI: 5120 case R_PPC_GOT_TPREL16_HA: 5121 case R_PPC_GOT_DTPREL16: 5122 case R_PPC_GOT_DTPREL16_LO: 5123 case R_PPC_GOT_DTPREL16_HI: 5124 case R_PPC_GOT_DTPREL16_HA: 5125 case R_PPC_GOT16: 5126 case R_PPC_GOT16_LO: 5127 case R_PPC_GOT16_HI: 5128 case R_PPC_GOT16_HA: 5129 if (h != NULL) 5130 { 5131 if (h->got.refcount > 0) 5132 h->got.refcount--; 5133 if (!bfd_link_pic (info)) 5134 { 5135 struct plt_entry *ent; 5136 5137 ent = find_plt_ent (&h->plt.plist, NULL, 0); 5138 if (ent != NULL && ent->plt.refcount > 0) 5139 ent->plt.refcount -= 1; 5140 } 5141 } 5142 else if (local_got_refcounts != NULL) 5143 { 5144 if (local_got_refcounts[r_symndx] > 0) 5145 local_got_refcounts[r_symndx]--; 5146 } 5147 break; 5148 5149 case R_PPC_REL24: 5150 case R_PPC_REL14: 5151 case R_PPC_REL14_BRTAKEN: 5152 case R_PPC_REL14_BRNTAKEN: 5153 case R_PPC_REL32: 5154 if (h == NULL || h == htab->elf.hgot) 5155 break; 5156 /* Fall thru */ 5157 5158 case R_PPC_ADDR32: 5159 case R_PPC_ADDR24: 5160 case R_PPC_ADDR16: 5161 case R_PPC_ADDR16_LO: 5162 case R_PPC_ADDR16_HI: 5163 case R_PPC_ADDR16_HA: 5164 case R_PPC_ADDR14: 5165 case R_PPC_ADDR14_BRTAKEN: 5166 case R_PPC_ADDR14_BRNTAKEN: 5167 case R_PPC_UADDR32: 5168 case R_PPC_UADDR16: 5169 if (bfd_link_pic (info)) 5170 break; 5171 5172 case R_PPC_PLT32: 5173 case R_PPC_PLTREL24: 5174 case R_PPC_PLTREL32: 5175 case R_PPC_PLT16_LO: 5176 case R_PPC_PLT16_HI: 5177 case R_PPC_PLT16_HA: 5178 if (h != NULL) 5179 { 5180 bfd_vma addend = 0; 5181 struct plt_entry *ent; 5182 5183 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 5184 addend = rel->r_addend; 5185 ent = find_plt_ent (&h->plt.plist, got2, addend); 5186 if (ent != NULL && ent->plt.refcount > 0) 5187 ent->plt.refcount -= 1; 5188 } 5189 break; 5190 5191 default: 5192 break; 5193 } 5194 } 5195 return TRUE; 5196} 5197 5198/* Set plt output section type, htab->tls_get_addr, and call the 5199 generic ELF tls_setup function. */ 5200 5201asection * 5202ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) 5203{ 5204 struct ppc_elf_link_hash_table *htab; 5205 5206 htab = ppc_elf_hash_table (info); 5207 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 5208 FALSE, FALSE, TRUE); 5209 if (htab->plt_type != PLT_NEW) 5210 htab->params->no_tls_get_addr_opt = TRUE; 5211 5212 if (!htab->params->no_tls_get_addr_opt) 5213 { 5214 struct elf_link_hash_entry *opt, *tga; 5215 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", 5216 FALSE, FALSE, TRUE); 5217 if (opt != NULL 5218 && (opt->root.type == bfd_link_hash_defined 5219 || opt->root.type == bfd_link_hash_defweak)) 5220 { 5221 /* If glibc supports an optimized __tls_get_addr call stub, 5222 signalled by the presence of __tls_get_addr_opt, and we'll 5223 be calling __tls_get_addr via a plt call stub, then 5224 make __tls_get_addr point to __tls_get_addr_opt. */ 5225 tga = htab->tls_get_addr; 5226 if (htab->elf.dynamic_sections_created 5227 && tga != NULL 5228 && (tga->type == STT_FUNC 5229 || tga->needs_plt) 5230 && !(SYMBOL_CALLS_LOCAL (info, tga) 5231 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT 5232 && tga->root.type == bfd_link_hash_undefweak))) 5233 { 5234 struct plt_entry *ent; 5235 for (ent = tga->plt.plist; ent != NULL; ent = ent->next) 5236 if (ent->plt.refcount > 0) 5237 break; 5238 if (ent != NULL) 5239 { 5240 tga->root.type = bfd_link_hash_indirect; 5241 tga->root.u.i.link = &opt->root; 5242 ppc_elf_copy_indirect_symbol (info, opt, tga); 5243 opt->forced_local = 0; 5244 if (opt->dynindx != -1) 5245 { 5246 /* Use __tls_get_addr_opt in dynamic relocations. */ 5247 opt->dynindx = -1; 5248 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 5249 opt->dynstr_index); 5250 if (!bfd_elf_link_record_dynamic_symbol (info, opt)) 5251 return FALSE; 5252 } 5253 htab->tls_get_addr = opt; 5254 } 5255 } 5256 } 5257 else 5258 htab->params->no_tls_get_addr_opt = TRUE; 5259 } 5260 if (htab->plt_type == PLT_NEW 5261 && htab->plt != NULL 5262 && htab->plt->output_section != NULL) 5263 { 5264 elf_section_type (htab->plt->output_section) = SHT_PROGBITS; 5265 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE; 5266 } 5267 5268 return _bfd_elf_tls_setup (obfd, info); 5269} 5270 5271/* Return TRUE iff REL is a branch reloc with a global symbol matching 5272 HASH. */ 5273 5274static bfd_boolean 5275branch_reloc_hash_match (const bfd *ibfd, 5276 const Elf_Internal_Rela *rel, 5277 const struct elf_link_hash_entry *hash) 5278{ 5279 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5280 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 5281 unsigned int r_symndx = ELF32_R_SYM (rel->r_info); 5282 5283 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) 5284 { 5285 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 5286 struct elf_link_hash_entry *h; 5287 5288 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5289 while (h->root.type == bfd_link_hash_indirect 5290 || h->root.type == bfd_link_hash_warning) 5291 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5292 if (h == hash) 5293 return TRUE; 5294 } 5295 return FALSE; 5296} 5297 5298/* Run through all the TLS relocs looking for optimization 5299 opportunities. */ 5300 5301bfd_boolean 5302ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, 5303 struct bfd_link_info *info) 5304{ 5305 bfd *ibfd; 5306 asection *sec; 5307 struct ppc_elf_link_hash_table *htab; 5308 int pass; 5309 5310 if (!bfd_link_executable (info)) 5311 return TRUE; 5312 5313 htab = ppc_elf_hash_table (info); 5314 if (htab == NULL) 5315 return FALSE; 5316 5317 /* Make two passes through the relocs. First time check that tls 5318 relocs involved in setting up a tls_get_addr call are indeed 5319 followed by such a call. If they are not, don't do any tls 5320 optimization. On the second pass twiddle tls_mask flags to 5321 notify relocate_section that optimization can be done, and 5322 adjust got and plt refcounts. */ 5323 for (pass = 0; pass < 2; ++pass) 5324 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 5325 { 5326 Elf_Internal_Sym *locsyms = NULL; 5327 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5328 asection *got2 = bfd_get_section_by_name (ibfd, ".got2"); 5329 5330 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 5331 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 5332 { 5333 Elf_Internal_Rela *relstart, *rel, *relend; 5334 int expecting_tls_get_addr = 0; 5335 5336 /* Read the relocations. */ 5337 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 5338 info->keep_memory); 5339 if (relstart == NULL) 5340 return FALSE; 5341 5342 relend = relstart + sec->reloc_count; 5343 for (rel = relstart; rel < relend; rel++) 5344 { 5345 enum elf_ppc_reloc_type r_type; 5346 unsigned long r_symndx; 5347 struct elf_link_hash_entry *h = NULL; 5348 char *tls_mask; 5349 char tls_set, tls_clear; 5350 bfd_boolean is_local; 5351 bfd_signed_vma *got_count; 5352 5353 r_symndx = ELF32_R_SYM (rel->r_info); 5354 if (r_symndx >= symtab_hdr->sh_info) 5355 { 5356 struct elf_link_hash_entry **sym_hashes; 5357 5358 sym_hashes = elf_sym_hashes (ibfd); 5359 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5360 while (h->root.type == bfd_link_hash_indirect 5361 || h->root.type == bfd_link_hash_warning) 5362 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5363 } 5364 5365 is_local = FALSE; 5366 if (h == NULL 5367 || !h->def_dynamic) 5368 is_local = TRUE; 5369 5370 r_type = ELF32_R_TYPE (rel->r_info); 5371 /* If this section has old-style __tls_get_addr calls 5372 without marker relocs, then check that each 5373 __tls_get_addr call reloc is preceded by a reloc 5374 that conceivably belongs to the __tls_get_addr arg 5375 setup insn. If we don't find matching arg setup 5376 relocs, don't do any tls optimization. */ 5377 if (pass == 0 5378 && sec->has_tls_get_addr_call 5379 && h != NULL 5380 && h == htab->tls_get_addr 5381 && !expecting_tls_get_addr 5382 && is_branch_reloc (r_type)) 5383 { 5384 info->callbacks->minfo ("%H __tls_get_addr lost arg, " 5385 "TLS optimization disabled\n", 5386 ibfd, sec, rel->r_offset); 5387 if (elf_section_data (sec)->relocs != relstart) 5388 free (relstart); 5389 return TRUE; 5390 } 5391 5392 expecting_tls_get_addr = 0; 5393 switch (r_type) 5394 { 5395 case R_PPC_GOT_TLSLD16: 5396 case R_PPC_GOT_TLSLD16_LO: 5397 expecting_tls_get_addr = 1; 5398 /* Fall thru */ 5399 5400 case R_PPC_GOT_TLSLD16_HI: 5401 case R_PPC_GOT_TLSLD16_HA: 5402 /* These relocs should never be against a symbol 5403 defined in a shared lib. Leave them alone if 5404 that turns out to be the case. */ 5405 if (!is_local) 5406 continue; 5407 5408 /* LD -> LE */ 5409 tls_set = 0; 5410 tls_clear = TLS_LD; 5411 break; 5412 5413 case R_PPC_GOT_TLSGD16: 5414 case R_PPC_GOT_TLSGD16_LO: 5415 expecting_tls_get_addr = 1; 5416 /* Fall thru */ 5417 5418 case R_PPC_GOT_TLSGD16_HI: 5419 case R_PPC_GOT_TLSGD16_HA: 5420 if (is_local) 5421 /* GD -> LE */ 5422 tls_set = 0; 5423 else 5424 /* GD -> IE */ 5425 tls_set = TLS_TLS | TLS_TPRELGD; 5426 tls_clear = TLS_GD; 5427 break; 5428 5429 case R_PPC_GOT_TPREL16: 5430 case R_PPC_GOT_TPREL16_LO: 5431 case R_PPC_GOT_TPREL16_HI: 5432 case R_PPC_GOT_TPREL16_HA: 5433 if (is_local) 5434 { 5435 /* IE -> LE */ 5436 tls_set = 0; 5437 tls_clear = TLS_TPREL; 5438 break; 5439 } 5440 else 5441 continue; 5442 5443 case R_PPC_TLSGD: 5444 case R_PPC_TLSLD: 5445 expecting_tls_get_addr = 2; 5446 tls_set = 0; 5447 tls_clear = 0; 5448 break; 5449 5450 default: 5451 continue; 5452 } 5453 5454 if (pass == 0) 5455 { 5456 if (!expecting_tls_get_addr 5457 || (expecting_tls_get_addr == 1 5458 && !sec->has_tls_get_addr_call)) 5459 continue; 5460 5461 if (rel + 1 < relend 5462 && branch_reloc_hash_match (ibfd, rel + 1, 5463 htab->tls_get_addr)) 5464 continue; 5465 5466 /* Uh oh, we didn't find the expected call. We 5467 could just mark this symbol to exclude it 5468 from tls optimization but it's safer to skip 5469 the entire optimization. */ 5470 info->callbacks->minfo (_("%H arg lost __tls_get_addr, " 5471 "TLS optimization disabled\n"), 5472 ibfd, sec, rel->r_offset); 5473 if (elf_section_data (sec)->relocs != relstart) 5474 free (relstart); 5475 return TRUE; 5476 } 5477 5478 if (expecting_tls_get_addr) 5479 { 5480 struct plt_entry *ent; 5481 bfd_vma addend = 0; 5482 5483 if (bfd_link_pic (info) 5484 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24) 5485 addend = rel[1].r_addend; 5486 ent = find_plt_ent (&htab->tls_get_addr->plt.plist, 5487 got2, addend); 5488 if (ent != NULL && ent->plt.refcount > 0) 5489 ent->plt.refcount -= 1; 5490 5491 if (expecting_tls_get_addr == 2) 5492 continue; 5493 } 5494 5495 if (h != NULL) 5496 { 5497 tls_mask = &ppc_elf_hash_entry (h)->tls_mask; 5498 got_count = &h->got.refcount; 5499 } 5500 else 5501 { 5502 bfd_signed_vma *lgot_refs; 5503 struct plt_entry **local_plt; 5504 char *lgot_masks; 5505 5506 if (locsyms == NULL) 5507 { 5508 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 5509 if (locsyms == NULL) 5510 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 5511 symtab_hdr->sh_info, 5512 0, NULL, NULL, NULL); 5513 if (locsyms == NULL) 5514 { 5515 if (elf_section_data (sec)->relocs != relstart) 5516 free (relstart); 5517 return FALSE; 5518 } 5519 } 5520 lgot_refs = elf_local_got_refcounts (ibfd); 5521 if (lgot_refs == NULL) 5522 abort (); 5523 local_plt = (struct plt_entry **) 5524 (lgot_refs + symtab_hdr->sh_info); 5525 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 5526 tls_mask = &lgot_masks[r_symndx]; 5527 got_count = &lgot_refs[r_symndx]; 5528 } 5529 5530 if (tls_set == 0) 5531 { 5532 /* We managed to get rid of a got entry. */ 5533 if (*got_count > 0) 5534 *got_count -= 1; 5535 } 5536 5537 *tls_mask |= tls_set; 5538 *tls_mask &= ~tls_clear; 5539 } 5540 5541 if (elf_section_data (sec)->relocs != relstart) 5542 free (relstart); 5543 } 5544 5545 if (locsyms != NULL 5546 && (symtab_hdr->contents != (unsigned char *) locsyms)) 5547 { 5548 if (!info->keep_memory) 5549 free (locsyms); 5550 else 5551 symtab_hdr->contents = (unsigned char *) locsyms; 5552 } 5553 } 5554 return TRUE; 5555} 5556 5557/* Return true if we have dynamic relocs that apply to read-only sections. */ 5558 5559static bfd_boolean 5560readonly_dynrelocs (struct elf_link_hash_entry *h) 5561{ 5562 struct elf_dyn_relocs *p; 5563 5564 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 5565 { 5566 asection *s = p->sec->output_section; 5567 5568 if (s != NULL 5569 && ((s->flags & (SEC_READONLY | SEC_ALLOC)) 5570 == (SEC_READONLY | SEC_ALLOC))) 5571 return TRUE; 5572 } 5573 return FALSE; 5574} 5575 5576/* Adjust a symbol defined by a dynamic object and referenced by a 5577 regular object. The current definition is in some section of the 5578 dynamic object, but we're not including those sections. We have to 5579 change the definition to something the rest of the link can 5580 understand. */ 5581 5582static bfd_boolean 5583ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 5584 struct elf_link_hash_entry *h) 5585{ 5586 struct ppc_elf_link_hash_table *htab; 5587 asection *s; 5588 5589#ifdef DEBUG 5590 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", 5591 h->root.root.string); 5592#endif 5593 5594 /* Make sure we know what is going on here. */ 5595 htab = ppc_elf_hash_table (info); 5596 BFD_ASSERT (htab->elf.dynobj != NULL 5597 && (h->needs_plt 5598 || h->type == STT_GNU_IFUNC 5599 || h->u.weakdef != NULL 5600 || (h->def_dynamic 5601 && h->ref_regular 5602 && !h->def_regular))); 5603 5604 /* Deal with function syms. */ 5605 if (h->type == STT_FUNC 5606 || h->type == STT_GNU_IFUNC 5607 || h->needs_plt) 5608 { 5609 /* Clear procedure linkage table information for any symbol that 5610 won't need a .plt entry. */ 5611 struct plt_entry *ent; 5612 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5613 if (ent->plt.refcount > 0) 5614 break; 5615 if (ent == NULL 5616 || (h->type != STT_GNU_IFUNC 5617 && (SYMBOL_CALLS_LOCAL (info, h) 5618 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 5619 && h->root.type == bfd_link_hash_undefweak)))) 5620 { 5621 /* A PLT entry is not required/allowed when: 5622 5623 1. We are not using ld.so; because then the PLT entry 5624 can't be set up, so we can't use one. In this case, 5625 ppc_elf_adjust_dynamic_symbol won't even be called. 5626 5627 2. GC has rendered the entry unused. 5628 5629 3. We know for certain that a call to this symbol 5630 will go to this object, or will remain undefined. */ 5631 h->plt.plist = NULL; 5632 h->needs_plt = 0; 5633 h->pointer_equality_needed = 0; 5634 } 5635 else 5636 { 5637 /* Taking a function's address in a read/write section 5638 doesn't require us to define the function symbol in the 5639 executable on a plt call stub. A dynamic reloc can 5640 be used instead. */ 5641 if (h->pointer_equality_needed 5642 && h->type != STT_GNU_IFUNC 5643 && !htab->is_vxworks 5644 && !ppc_elf_hash_entry (h)->has_sda_refs 5645 && !readonly_dynrelocs (h)) 5646 { 5647 h->pointer_equality_needed = 0; 5648 h->non_got_ref = 0; 5649 } 5650 5651 /* After adjust_dynamic_symbol, non_got_ref set in the 5652 non-shared case means that we have allocated space in 5653 .dynbss for the symbol and thus dyn_relocs for this 5654 symbol should be discarded. 5655 If we get here we know we are making a PLT entry for this 5656 symbol, and in an executable we'd normally resolve 5657 relocations against this symbol to the PLT entry. Allow 5658 dynamic relocs if the reference is weak, and the dynamic 5659 relocs will not cause text relocation. */ 5660 else if (!h->ref_regular_nonweak 5661 && h->non_got_ref 5662 && h->type != STT_GNU_IFUNC 5663 && !htab->is_vxworks 5664 && !ppc_elf_hash_entry (h)->has_sda_refs 5665 && !readonly_dynrelocs (h)) 5666 h->non_got_ref = 0; 5667 } 5668 h->protected_def = 0; 5669 return TRUE; 5670 } 5671 else 5672 h->plt.plist = NULL; 5673 5674 /* If this is a weak symbol, and there is a real definition, the 5675 processor independent code will have arranged for us to see the 5676 real definition first, and we can just use the same value. */ 5677 if (h->u.weakdef != NULL) 5678 { 5679 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 5680 || h->u.weakdef->root.type == bfd_link_hash_defweak); 5681 h->root.u.def.section = h->u.weakdef->root.u.def.section; 5682 h->root.u.def.value = h->u.weakdef->root.u.def.value; 5683 if (ELIMINATE_COPY_RELOCS) 5684 h->non_got_ref = h->u.weakdef->non_got_ref; 5685 return TRUE; 5686 } 5687 5688 /* This is a reference to a symbol defined by a dynamic object which 5689 is not a function. */ 5690 5691 /* If we are creating a shared library, we must presume that the 5692 only references to the symbol are via the global offset table. 5693 For such cases we need not do anything here; the relocations will 5694 be handled correctly by relocate_section. */ 5695 if (bfd_link_pic (info)) 5696 { 5697 h->protected_def = 0; 5698 return TRUE; 5699 } 5700 5701 /* If there are no references to this symbol that do not use the 5702 GOT, we don't need to generate a copy reloc. */ 5703 if (!h->non_got_ref) 5704 { 5705 h->protected_def = 0; 5706 return TRUE; 5707 } 5708 5709 /* Protected variables do not work with .dynbss. The copy in 5710 .dynbss won't be used by the shared library with the protected 5711 definition for the variable. Editing to PIC, or text relocations 5712 are preferable to an incorrect program. */ 5713 if (h->protected_def) 5714 { 5715 if (ELIMINATE_COPY_RELOCS 5716 && ppc_elf_hash_entry (h)->has_addr16_ha 5717 && ppc_elf_hash_entry (h)->has_addr16_lo 5718 && htab->params->pic_fixup == 0 5719 && info->disable_target_specific_optimizations <= 1) 5720 htab->params->pic_fixup = 1; 5721 h->non_got_ref = 0; 5722 return TRUE; 5723 } 5724 5725 /* If -z nocopyreloc was given, we won't generate them either. */ 5726 if (info->nocopyreloc) 5727 { 5728 h->non_got_ref = 0; 5729 return TRUE; 5730 } 5731 5732 /* If we didn't find any dynamic relocs in read-only sections, then 5733 we'll be keeping the dynamic relocs and avoiding the copy reloc. 5734 We can't do this if there are any small data relocations. This 5735 doesn't work on VxWorks, where we can not have dynamic 5736 relocations (other than copy and jump slot relocations) in an 5737 executable. */ 5738 if (ELIMINATE_COPY_RELOCS 5739 && !ppc_elf_hash_entry (h)->has_sda_refs 5740 && !htab->is_vxworks 5741 && !h->def_regular 5742 && !readonly_dynrelocs (h)) 5743 { 5744 h->non_got_ref = 0; 5745 return TRUE; 5746 } 5747 5748 /* We must allocate the symbol in our .dynbss section, which will 5749 become part of the .bss section of the executable. There will be 5750 an entry for this symbol in the .dynsym section. The dynamic 5751 object will contain position independent code, so all references 5752 from the dynamic object to this symbol will go through the global 5753 offset table. The dynamic linker will use the .dynsym entry to 5754 determine the address it must put in the global offset table, so 5755 both the dynamic object and the regular object will refer to the 5756 same memory location for the variable. 5757 5758 Of course, if the symbol is referenced using SDAREL relocs, we 5759 must instead allocate it in .sbss. */ 5760 5761 if (ppc_elf_hash_entry (h)->has_sda_refs) 5762 s = htab->dynsbss; 5763 else 5764 s = htab->dynbss; 5765 BFD_ASSERT (s != NULL); 5766 5767 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to 5768 copy the initial value out of the dynamic object and into the 5769 runtime process image. We need to remember the offset into the 5770 .rela.bss section we are going to use. */ 5771 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 5772 { 5773 asection *srel; 5774 5775 if (ppc_elf_hash_entry (h)->has_sda_refs) 5776 srel = htab->relsbss; 5777 else 5778 srel = htab->relbss; 5779 BFD_ASSERT (srel != NULL); 5780 srel->size += sizeof (Elf32_External_Rela); 5781 h->needs_copy = 1; 5782 } 5783 5784 return _bfd_elf_adjust_dynamic_copy (info, h, s); 5785} 5786 5787/* Generate a symbol to mark plt call stubs. For non-PIC code the sym is 5788 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, 5789 specifying the addend on the plt relocation. For -fpic code, the sym 5790 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC 5791 xxxxxxxx.got2.plt_pic32.<callee>. */ 5792 5793static bfd_boolean 5794add_stub_sym (struct plt_entry *ent, 5795 struct elf_link_hash_entry *h, 5796 struct bfd_link_info *info) 5797{ 5798 struct elf_link_hash_entry *sh; 5799 size_t len1, len2, len3; 5800 char *name; 5801 const char *stub; 5802 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 5803 5804 if (bfd_link_pic (info)) 5805 stub = ".plt_pic32."; 5806 else 5807 stub = ".plt_call32."; 5808 5809 len1 = strlen (h->root.root.string); 5810 len2 = strlen (stub); 5811 len3 = 0; 5812 if (ent->sec) 5813 len3 = strlen (ent->sec->name); 5814 name = bfd_malloc (len1 + len2 + len3 + 9); 5815 if (name == NULL) 5816 return FALSE; 5817 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); 5818 if (ent->sec) 5819 memcpy (name + 8, ent->sec->name, len3); 5820 memcpy (name + 8 + len3, stub, len2); 5821 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); 5822 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); 5823 if (sh == NULL) 5824 return FALSE; 5825 if (sh->root.type == bfd_link_hash_new) 5826 { 5827 sh->root.type = bfd_link_hash_defined; 5828 sh->root.u.def.section = htab->glink; 5829 sh->root.u.def.value = ent->glink_offset; 5830 sh->ref_regular = 1; 5831 sh->def_regular = 1; 5832 sh->ref_regular_nonweak = 1; 5833 sh->forced_local = 1; 5834 sh->non_elf = 0; 5835 sh->root.linker_def = 1; 5836 } 5837 return TRUE; 5838} 5839 5840/* Allocate NEED contiguous space in .got, and return the offset. 5841 Handles allocation of the got header when crossing 32k. */ 5842 5843static bfd_vma 5844allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) 5845{ 5846 bfd_vma where; 5847 unsigned int max_before_header; 5848 5849 if (htab->plt_type == PLT_VXWORKS) 5850 { 5851 where = htab->got->size; 5852 htab->got->size += need; 5853 } 5854 else 5855 { 5856 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; 5857 if (need <= htab->got_gap) 5858 { 5859 where = max_before_header - htab->got_gap; 5860 htab->got_gap -= need; 5861 } 5862 else 5863 { 5864 if (htab->got->size + need > max_before_header 5865 && htab->got->size <= max_before_header) 5866 { 5867 htab->got_gap = max_before_header - htab->got->size; 5868 htab->got->size = max_before_header + htab->got_header_size; 5869 } 5870 where = htab->got->size; 5871 htab->got->size += need; 5872 } 5873 } 5874 return where; 5875} 5876 5877/* Allocate space in associated reloc sections for dynamic relocs. */ 5878 5879static bfd_boolean 5880allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 5881{ 5882 struct bfd_link_info *info = inf; 5883 struct ppc_elf_link_hash_entry *eh; 5884 struct ppc_elf_link_hash_table *htab; 5885 struct elf_dyn_relocs *p; 5886 5887 if (h->root.type == bfd_link_hash_indirect) 5888 return TRUE; 5889 5890 htab = ppc_elf_hash_table (info); 5891 if (htab->elf.dynamic_sections_created 5892 || h->type == STT_GNU_IFUNC) 5893 { 5894 struct plt_entry *ent; 5895 bfd_boolean doneone = FALSE; 5896 bfd_vma plt_offset = 0, glink_offset = 0; 5897 bfd_boolean dyn; 5898 5899 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5900 if (ent->plt.refcount > 0) 5901 { 5902 /* Make sure this symbol is output as a dynamic symbol. */ 5903 if (h->dynindx == -1 5904 && !h->forced_local 5905 && !h->def_regular 5906 && htab->elf.dynamic_sections_created) 5907 { 5908 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 5909 return FALSE; 5910 } 5911 5912 dyn = htab->elf.dynamic_sections_created; 5913 if (bfd_link_pic (info) 5914 || h->type == STT_GNU_IFUNC 5915 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) 5916 { 5917 asection *s = htab->plt; 5918 if (!dyn || h->dynindx == -1) 5919 s = htab->iplt; 5920 5921 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1) 5922 { 5923 if (!doneone) 5924 { 5925 plt_offset = s->size; 5926 s->size += 4; 5927 } 5928 ent->plt.offset = plt_offset; 5929 5930 s = htab->glink; 5931 if (!doneone || bfd_link_pic (info)) 5932 { 5933 glink_offset = s->size; 5934 s->size += GLINK_ENTRY_SIZE; 5935 if (h == htab->tls_get_addr 5936 && !htab->params->no_tls_get_addr_opt) 5937 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE; 5938 } 5939 if (!doneone 5940 && !bfd_link_pic (info) 5941 && h->def_dynamic 5942 && !h->def_regular) 5943 { 5944 h->root.u.def.section = s; 5945 h->root.u.def.value = glink_offset; 5946 } 5947 ent->glink_offset = glink_offset; 5948 5949 if (htab->params->emit_stub_syms 5950 && !add_stub_sym (ent, h, info)) 5951 return FALSE; 5952 } 5953 else 5954 { 5955 if (!doneone) 5956 { 5957 /* If this is the first .plt entry, make room 5958 for the special first entry. */ 5959 if (s->size == 0) 5960 s->size += htab->plt_initial_entry_size; 5961 5962 /* The PowerPC PLT is actually composed of two 5963 parts, the first part is 2 words (for a load 5964 and a jump), and then there is a remaining 5965 word available at the end. */ 5966 plt_offset = (htab->plt_initial_entry_size 5967 + (htab->plt_slot_size 5968 * ((s->size 5969 - htab->plt_initial_entry_size) 5970 / htab->plt_entry_size))); 5971 5972 /* If this symbol is not defined in a regular 5973 file, and we are not generating a shared 5974 library, then set the symbol to this location 5975 in the .plt. This is to avoid text 5976 relocations, and is required to make 5977 function pointers compare as equal between 5978 the normal executable and the shared library. */ 5979 if (! bfd_link_pic (info) 5980 && h->def_dynamic 5981 && !h->def_regular) 5982 { 5983 h->root.u.def.section = s; 5984 h->root.u.def.value = plt_offset; 5985 } 5986 5987 /* Make room for this entry. */ 5988 s->size += htab->plt_entry_size; 5989 /* After the 8192nd entry, room for two entries 5990 is allocated. */ 5991 if (htab->plt_type == PLT_OLD 5992 && (s->size - htab->plt_initial_entry_size) 5993 / htab->plt_entry_size 5994 > PLT_NUM_SINGLE_ENTRIES) 5995 s->size += htab->plt_entry_size; 5996 } 5997 ent->plt.offset = plt_offset; 5998 } 5999 6000 /* We also need to make an entry in the .rela.plt section. */ 6001 if (!doneone) 6002 { 6003 if (!htab->elf.dynamic_sections_created 6004 || h->dynindx == -1) 6005 htab->reliplt->size += sizeof (Elf32_External_Rela); 6006 else 6007 { 6008 htab->relplt->size += sizeof (Elf32_External_Rela); 6009 6010 if (htab->plt_type == PLT_VXWORKS) 6011 { 6012 /* Allocate space for the unloaded relocations. */ 6013 if (!bfd_link_pic (info) 6014 && htab->elf.dynamic_sections_created) 6015 { 6016 if (ent->plt.offset 6017 == (bfd_vma) htab->plt_initial_entry_size) 6018 { 6019 htab->srelplt2->size 6020 += (sizeof (Elf32_External_Rela) 6021 * VXWORKS_PLTRESOLVE_RELOCS); 6022 } 6023 6024 htab->srelplt2->size 6025 += (sizeof (Elf32_External_Rela) 6026 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS); 6027 } 6028 6029 /* Every PLT entry has an associated GOT entry in 6030 .got.plt. */ 6031 htab->sgotplt->size += 4; 6032 } 6033 } 6034 doneone = TRUE; 6035 } 6036 } 6037 else 6038 ent->plt.offset = (bfd_vma) -1; 6039 } 6040 else 6041 ent->plt.offset = (bfd_vma) -1; 6042 6043 if (!doneone) 6044 { 6045 h->plt.plist = NULL; 6046 h->needs_plt = 0; 6047 } 6048 } 6049 else 6050 { 6051 h->plt.plist = NULL; 6052 h->needs_plt = 0; 6053 } 6054 6055 eh = (struct ppc_elf_link_hash_entry *) h; 6056 if (eh->elf.got.refcount > 0 6057 || (ELIMINATE_COPY_RELOCS 6058 && !eh->elf.def_regular 6059 && eh->elf.protected_def 6060 && eh->has_addr16_ha 6061 && eh->has_addr16_lo 6062 && htab->params->pic_fixup > 0)) 6063 { 6064 bfd_boolean dyn; 6065 unsigned int need; 6066 6067 /* Make sure this symbol is output as a dynamic symbol. */ 6068 if (eh->elf.dynindx == -1 6069 && !eh->elf.forced_local 6070 && eh->elf.type != STT_GNU_IFUNC 6071 && htab->elf.dynamic_sections_created) 6072 { 6073 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) 6074 return FALSE; 6075 } 6076 6077 need = 0; 6078 if ((eh->tls_mask & TLS_TLS) != 0) 6079 { 6080 if ((eh->tls_mask & TLS_LD) != 0) 6081 { 6082 if (!eh->elf.def_dynamic) 6083 /* We'll just use htab->tlsld_got.offset. This should 6084 always be the case. It's a little odd if we have 6085 a local dynamic reloc against a non-local symbol. */ 6086 htab->tlsld_got.refcount += 1; 6087 else 6088 need += 8; 6089 } 6090 if ((eh->tls_mask & TLS_GD) != 0) 6091 need += 8; 6092 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) 6093 need += 4; 6094 if ((eh->tls_mask & TLS_DTPREL) != 0) 6095 need += 4; 6096 } 6097 else 6098 need += 4; 6099 if (need == 0) 6100 eh->elf.got.offset = (bfd_vma) -1; 6101 else 6102 { 6103 eh->elf.got.offset = allocate_got (htab, need); 6104 dyn = htab->elf.dynamic_sections_created; 6105 if ((bfd_link_pic (info) 6106 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) 6107 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT 6108 || eh->elf.root.type != bfd_link_hash_undefweak)) 6109 { 6110 asection *rsec = htab->relgot; 6111 6112 if (eh->elf.type == STT_GNU_IFUNC) 6113 rsec = htab->reliplt; 6114 /* All the entries we allocated need relocs. 6115 Except LD only needs one. */ 6116 if ((eh->tls_mask & TLS_LD) != 0 6117 && eh->elf.def_dynamic) 6118 need -= 4; 6119 rsec->size += need * (sizeof (Elf32_External_Rela) / 4); 6120 } 6121 } 6122 } 6123 else 6124 eh->elf.got.offset = (bfd_vma) -1; 6125 6126 if (eh->dyn_relocs == NULL 6127 || !htab->elf.dynamic_sections_created) 6128 return TRUE; 6129 6130 /* In the shared -Bsymbolic case, discard space allocated for 6131 dynamic pc-relative relocs against symbols which turn out to be 6132 defined in regular objects. For the normal shared case, discard 6133 space for relocs that have become local due to symbol visibility 6134 changes. */ 6135 6136 if (bfd_link_pic (info)) 6137 { 6138 /* Relocs that use pc_count are those that appear on a call insn, 6139 or certain REL relocs (see must_be_dyn_reloc) that can be 6140 generated via assembly. We want calls to protected symbols to 6141 resolve directly to the function rather than going via the plt. 6142 If people want function pointer comparisons to work as expected 6143 then they should avoid writing weird assembly. */ 6144 if (SYMBOL_CALLS_LOCAL (info, h)) 6145 { 6146 struct elf_dyn_relocs **pp; 6147 6148 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 6149 { 6150 p->count -= p->pc_count; 6151 p->pc_count = 0; 6152 if (p->count == 0) 6153 *pp = p->next; 6154 else 6155 pp = &p->next; 6156 } 6157 } 6158 6159 if (htab->is_vxworks) 6160 { 6161 struct elf_dyn_relocs **pp; 6162 6163 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 6164 { 6165 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) 6166 *pp = p->next; 6167 else 6168 pp = &p->next; 6169 } 6170 } 6171 6172 /* Discard relocs on undefined symbols that must be local. */ 6173 if (eh->dyn_relocs != NULL 6174 && h->root.type == bfd_link_hash_undefined 6175 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 6176 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 6177 eh->dyn_relocs = NULL; 6178 6179 /* Also discard relocs on undefined weak syms with non-default 6180 visibility. */ 6181 if (eh->dyn_relocs != NULL 6182 && h->root.type == bfd_link_hash_undefweak) 6183 { 6184 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 6185 eh->dyn_relocs = NULL; 6186 6187 /* Make sure undefined weak symbols are output as a dynamic 6188 symbol in PIEs. */ 6189 else if (h->dynindx == -1 6190 && !h->forced_local 6191 && !h->def_regular) 6192 { 6193 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 6194 return FALSE; 6195 } 6196 } 6197 } 6198 else if (ELIMINATE_COPY_RELOCS) 6199 { 6200 /* For the non-shared case, discard space for relocs against 6201 symbols which turn out to need copy relocs or are not 6202 dynamic. */ 6203 6204 if (!h->non_got_ref 6205 && !h->def_regular 6206 && !(h->protected_def 6207 && eh->has_addr16_ha 6208 && eh->has_addr16_lo 6209 && htab->params->pic_fixup > 0)) 6210 { 6211 /* Make sure this symbol is output as a dynamic symbol. 6212 Undefined weak syms won't yet be marked as dynamic. */ 6213 if (h->dynindx == -1 6214 && !h->forced_local) 6215 { 6216 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 6217 return FALSE; 6218 } 6219 6220 /* If that succeeded, we know we'll be keeping all the 6221 relocs. */ 6222 if (h->dynindx != -1) 6223 goto keep; 6224 } 6225 6226 eh->dyn_relocs = NULL; 6227 6228 keep: ; 6229 } 6230 6231 /* Finally, allocate space. */ 6232 for (p = eh->dyn_relocs; p != NULL; p = p->next) 6233 { 6234 asection *sreloc = elf_section_data (p->sec)->sreloc; 6235 if (eh->elf.type == STT_GNU_IFUNC) 6236 sreloc = htab->reliplt; 6237 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6238 } 6239 6240 return TRUE; 6241} 6242 6243/* Set DF_TEXTREL if we find any dynamic relocs that apply to 6244 read-only sections. */ 6245 6246static bfd_boolean 6247maybe_set_textrel (struct elf_link_hash_entry *h, void *info) 6248{ 6249 if (h->root.type == bfd_link_hash_indirect) 6250 return TRUE; 6251 6252 if (readonly_dynrelocs (h)) 6253 { 6254 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; 6255 6256 /* Not an error, just cut short the traversal. */ 6257 return FALSE; 6258 } 6259 return TRUE; 6260} 6261 6262static const unsigned char glink_eh_frame_cie[] = 6263{ 6264 0, 0, 0, 16, /* length. */ 6265 0, 0, 0, 0, /* id. */ 6266 1, /* CIE version. */ 6267 'z', 'R', 0, /* Augmentation string. */ 6268 4, /* Code alignment. */ 6269 0x7c, /* Data alignment. */ 6270 65, /* RA reg. */ 6271 1, /* Augmentation size. */ 6272 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ 6273 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ 6274}; 6275 6276/* Set the sizes of the dynamic sections. */ 6277 6278static bfd_boolean 6279ppc_elf_size_dynamic_sections (bfd *output_bfd, 6280 struct bfd_link_info *info) 6281{ 6282 struct ppc_elf_link_hash_table *htab; 6283 asection *s; 6284 bfd_boolean relocs; 6285 bfd *ibfd; 6286 6287#ifdef DEBUG 6288 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); 6289#endif 6290 6291 htab = ppc_elf_hash_table (info); 6292 BFD_ASSERT (htab->elf.dynobj != NULL); 6293 6294 if (elf_hash_table (info)->dynamic_sections_created) 6295 { 6296 /* Set the contents of the .interp section to the interpreter. */ 6297 if (bfd_link_executable (info) && !info->nointerp) 6298 { 6299 s = bfd_get_linker_section (htab->elf.dynobj, ".interp"); 6300 BFD_ASSERT (s != NULL); 6301 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 6302 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 6303 } 6304 } 6305 6306 if (htab->plt_type == PLT_OLD) 6307 htab->got_header_size = 16; 6308 else if (htab->plt_type == PLT_NEW) 6309 htab->got_header_size = 12; 6310 6311 /* Set up .got offsets for local syms, and space for local dynamic 6312 relocs. */ 6313 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 6314 { 6315 bfd_signed_vma *local_got; 6316 bfd_signed_vma *end_local_got; 6317 struct plt_entry **local_plt; 6318 struct plt_entry **end_local_plt; 6319 char *lgot_masks; 6320 bfd_size_type locsymcount; 6321 Elf_Internal_Shdr *symtab_hdr; 6322 6323 if (!is_ppc_elf (ibfd)) 6324 continue; 6325 6326 for (s = ibfd->sections; s != NULL; s = s->next) 6327 { 6328 struct ppc_dyn_relocs *p; 6329 6330 for (p = ((struct ppc_dyn_relocs *) 6331 elf_section_data (s)->local_dynrel); 6332 p != NULL; 6333 p = p->next) 6334 { 6335 if (!bfd_is_abs_section (p->sec) 6336 && bfd_is_abs_section (p->sec->output_section)) 6337 { 6338 /* Input section has been discarded, either because 6339 it is a copy of a linkonce section or due to 6340 linker script /DISCARD/, so we'll be discarding 6341 the relocs too. */ 6342 } 6343 else if (htab->is_vxworks 6344 && strcmp (p->sec->output_section->name, 6345 ".tls_vars") == 0) 6346 { 6347 /* Relocations in vxworks .tls_vars sections are 6348 handled specially by the loader. */ 6349 } 6350 else if (p->count != 0) 6351 { 6352 asection *sreloc = elf_section_data (p->sec)->sreloc; 6353 if (p->ifunc) 6354 sreloc = htab->reliplt; 6355 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6356 if ((p->sec->output_section->flags 6357 & (SEC_READONLY | SEC_ALLOC)) 6358 == (SEC_READONLY | SEC_ALLOC)) 6359 info->flags |= DF_TEXTREL; 6360 } 6361 } 6362 } 6363 6364 local_got = elf_local_got_refcounts (ibfd); 6365 if (!local_got) 6366 continue; 6367 6368 symtab_hdr = &elf_symtab_hdr (ibfd); 6369 locsymcount = symtab_hdr->sh_info; 6370 end_local_got = local_got + locsymcount; 6371 local_plt = (struct plt_entry **) end_local_got; 6372 end_local_plt = local_plt + locsymcount; 6373 lgot_masks = (char *) end_local_plt; 6374 6375 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 6376 if (*local_got > 0) 6377 { 6378 unsigned int need = 0; 6379 if ((*lgot_masks & TLS_TLS) != 0) 6380 { 6381 if ((*lgot_masks & TLS_GD) != 0) 6382 need += 8; 6383 if ((*lgot_masks & TLS_LD) != 0) 6384 htab->tlsld_got.refcount += 1; 6385 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) 6386 need += 4; 6387 if ((*lgot_masks & TLS_DTPREL) != 0) 6388 need += 4; 6389 } 6390 else 6391 need += 4; 6392 if (need == 0) 6393 *local_got = (bfd_vma) -1; 6394 else 6395 { 6396 *local_got = allocate_got (htab, need); 6397 if (bfd_link_pic (info)) 6398 { 6399 asection *srel = htab->relgot; 6400 if ((*lgot_masks & PLT_IFUNC) != 0) 6401 srel = htab->reliplt; 6402 srel->size += need * (sizeof (Elf32_External_Rela) / 4); 6403 } 6404 } 6405 } 6406 else 6407 *local_got = (bfd_vma) -1; 6408 6409 if (htab->is_vxworks) 6410 continue; 6411 6412 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ 6413 for (; local_plt < end_local_plt; ++local_plt) 6414 { 6415 struct plt_entry *ent; 6416 bfd_boolean doneone = FALSE; 6417 bfd_vma plt_offset = 0, glink_offset = 0; 6418 6419 for (ent = *local_plt; ent != NULL; ent = ent->next) 6420 if (ent->plt.refcount > 0) 6421 { 6422 s = htab->iplt; 6423 6424 if (!doneone) 6425 { 6426 plt_offset = s->size; 6427 s->size += 4; 6428 } 6429 ent->plt.offset = plt_offset; 6430 6431 s = htab->glink; 6432 if (!doneone || bfd_link_pic (info)) 6433 { 6434 glink_offset = s->size; 6435 s->size += GLINK_ENTRY_SIZE; 6436 } 6437 ent->glink_offset = glink_offset; 6438 6439 if (!doneone) 6440 { 6441 htab->reliplt->size += sizeof (Elf32_External_Rela); 6442 doneone = TRUE; 6443 } 6444 } 6445 else 6446 ent->plt.offset = (bfd_vma) -1; 6447 } 6448 } 6449 6450 /* Allocate space for global sym dynamic relocs. */ 6451 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 6452 6453 if (htab->tlsld_got.refcount > 0) 6454 { 6455 htab->tlsld_got.offset = allocate_got (htab, 8); 6456 if (bfd_link_pic (info)) 6457 htab->relgot->size += sizeof (Elf32_External_Rela); 6458 } 6459 else 6460 htab->tlsld_got.offset = (bfd_vma) -1; 6461 6462 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) 6463 { 6464 unsigned int g_o_t = 32768; 6465 6466 /* If we haven't allocated the header, do so now. When we get here, 6467 for old plt/got the got size will be 0 to 32764 (not allocated), 6468 or 32780 to 65536 (header allocated). For new plt/got, the 6469 corresponding ranges are 0 to 32768 and 32780 to 65536. */ 6470 if (htab->got->size <= 32768) 6471 { 6472 g_o_t = htab->got->size; 6473 if (htab->plt_type == PLT_OLD) 6474 g_o_t += 4; 6475 htab->got->size += htab->got_header_size; 6476 } 6477 6478 htab->elf.hgot->root.u.def.value = g_o_t; 6479 } 6480 if (bfd_link_pic (info)) 6481 { 6482 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 6483 6484 sda->root.u.def.section = htab->elf.hgot->root.u.def.section; 6485 sda->root.u.def.value = htab->elf.hgot->root.u.def.value; 6486 } 6487 if (info->emitrelocations) 6488 { 6489 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 6490 6491 if (sda != NULL && sda->ref_regular) 6492 sda->root.u.def.section->flags |= SEC_KEEP; 6493 sda = htab->sdata[1].sym; 6494 if (sda != NULL && sda->ref_regular) 6495 sda->root.u.def.section->flags |= SEC_KEEP; 6496 } 6497 6498 if (htab->glink != NULL 6499 && htab->glink->size != 0 6500 && htab->elf.dynamic_sections_created) 6501 { 6502 htab->glink_pltresolve = htab->glink->size; 6503 /* Space for the branch table. */ 6504 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; 6505 /* Pad out to align the start of PLTresolve. */ 6506 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround 6507 ? 63 : 15); 6508 htab->glink->size += GLINK_PLTRESOLVE; 6509 6510 if (htab->params->emit_stub_syms) 6511 { 6512 struct elf_link_hash_entry *sh; 6513 sh = elf_link_hash_lookup (&htab->elf, "__glink", 6514 TRUE, FALSE, FALSE); 6515 if (sh == NULL) 6516 return FALSE; 6517 if (sh->root.type == bfd_link_hash_new) 6518 { 6519 sh->root.type = bfd_link_hash_defined; 6520 sh->root.u.def.section = htab->glink; 6521 sh->root.u.def.value = htab->glink_pltresolve; 6522 sh->ref_regular = 1; 6523 sh->def_regular = 1; 6524 sh->ref_regular_nonweak = 1; 6525 sh->forced_local = 1; 6526 sh->non_elf = 0; 6527 sh->root.linker_def = 1; 6528 } 6529 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", 6530 TRUE, FALSE, FALSE); 6531 if (sh == NULL) 6532 return FALSE; 6533 if (sh->root.type == bfd_link_hash_new) 6534 { 6535 sh->root.type = bfd_link_hash_defined; 6536 sh->root.u.def.section = htab->glink; 6537 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; 6538 sh->ref_regular = 1; 6539 sh->def_regular = 1; 6540 sh->ref_regular_nonweak = 1; 6541 sh->forced_local = 1; 6542 sh->non_elf = 0; 6543 sh->root.linker_def = 1; 6544 } 6545 } 6546 } 6547 6548 if (htab->glink != NULL 6549 && htab->glink->size != 0 6550 && htab->glink_eh_frame != NULL 6551 && !bfd_is_abs_section (htab->glink_eh_frame->output_section) 6552 && _bfd_elf_eh_frame_present (info)) 6553 { 6554 s = htab->glink_eh_frame; 6555 s->size = sizeof (glink_eh_frame_cie) + 20; 6556 if (bfd_link_pic (info)) 6557 { 6558 s->size += 4; 6559 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256) 6560 s->size += 4; 6561 } 6562 } 6563 6564 /* We've now determined the sizes of the various dynamic sections. 6565 Allocate memory for them. */ 6566 relocs = FALSE; 6567 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) 6568 { 6569 bfd_boolean strip_section = TRUE; 6570 6571 if ((s->flags & SEC_LINKER_CREATED) == 0) 6572 continue; 6573 6574 if (s == htab->plt 6575 || s == htab->got) 6576 { 6577 /* We'd like to strip these sections if they aren't needed, but if 6578 we've exported dynamic symbols from them we must leave them. 6579 It's too late to tell BFD to get rid of the symbols. */ 6580 if (htab->elf.hplt != NULL) 6581 strip_section = FALSE; 6582 /* Strip this section if we don't need it; see the 6583 comment below. */ 6584 } 6585 else if (s == htab->iplt 6586 || s == htab->glink 6587 || s == htab->glink_eh_frame 6588 || s == htab->sgotplt 6589 || s == htab->sbss 6590 || s == htab->dynbss 6591 || s == htab->dynsbss) 6592 { 6593 /* Strip these too. */ 6594 } 6595 else if (s == htab->sdata[0].section 6596 || s == htab->sdata[1].section) 6597 { 6598 strip_section = (s->flags & SEC_KEEP) == 0; 6599 } 6600 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s), 6601 ".rela")) 6602 { 6603 if (s->size != 0) 6604 { 6605 /* Remember whether there are any relocation sections. */ 6606 relocs = TRUE; 6607 6608 /* We use the reloc_count field as a counter if we need 6609 to copy relocs into the output file. */ 6610 s->reloc_count = 0; 6611 } 6612 } 6613 else 6614 { 6615 /* It's not one of our sections, so don't allocate space. */ 6616 continue; 6617 } 6618 6619 if (s->size == 0 && strip_section) 6620 { 6621 /* If we don't need this section, strip it from the 6622 output file. This is mostly to handle .rela.bss and 6623 .rela.plt. We must create both sections in 6624 create_dynamic_sections, because they must be created 6625 before the linker maps input sections to output 6626 sections. The linker does that before 6627 adjust_dynamic_symbol is called, and it is that 6628 function which decides whether anything needs to go 6629 into these sections. */ 6630 s->flags |= SEC_EXCLUDE; 6631 continue; 6632 } 6633 6634 if ((s->flags & SEC_HAS_CONTENTS) == 0) 6635 continue; 6636 6637 /* Allocate memory for the section contents. */ 6638 s->contents = bfd_zalloc (htab->elf.dynobj, s->size); 6639 if (s->contents == NULL) 6640 return FALSE; 6641 } 6642 6643 if (htab->elf.dynamic_sections_created) 6644 { 6645 /* Add some entries to the .dynamic section. We fill in the 6646 values later, in ppc_elf_finish_dynamic_sections, but we 6647 must add the entries now so that we get the correct size for 6648 the .dynamic section. The DT_DEBUG entry is filled in by the 6649 dynamic linker and used by the debugger. */ 6650#define add_dynamic_entry(TAG, VAL) \ 6651 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 6652 6653 if (bfd_link_executable (info)) 6654 { 6655 if (!add_dynamic_entry (DT_DEBUG, 0)) 6656 return FALSE; 6657 } 6658 6659 if (htab->plt != NULL && htab->plt->size != 0) 6660 { 6661 if (!add_dynamic_entry (DT_PLTGOT, 0) 6662 || !add_dynamic_entry (DT_PLTRELSZ, 0) 6663 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 6664 || !add_dynamic_entry (DT_JMPREL, 0)) 6665 return FALSE; 6666 } 6667 6668 if (htab->plt_type == PLT_NEW 6669 && htab->glink != NULL 6670 && htab->glink->size != 0) 6671 { 6672 if (!add_dynamic_entry (DT_PPC_GOT, 0)) 6673 return FALSE; 6674 if (!htab->params->no_tls_get_addr_opt 6675 && htab->tls_get_addr != NULL 6676 && htab->tls_get_addr->plt.plist != NULL 6677 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS)) 6678 return FALSE; 6679 } 6680 6681 if (relocs) 6682 { 6683 if (!add_dynamic_entry (DT_RELA, 0) 6684 || !add_dynamic_entry (DT_RELASZ, 0) 6685 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 6686 return FALSE; 6687 } 6688 6689 /* If any dynamic relocs apply to a read-only section, then we 6690 need a DT_TEXTREL entry. */ 6691 if ((info->flags & DF_TEXTREL) == 0) 6692 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel, 6693 info); 6694 6695 if ((info->flags & DF_TEXTREL) != 0) 6696 { 6697 if (!add_dynamic_entry (DT_TEXTREL, 0)) 6698 return FALSE; 6699 } 6700 if (htab->is_vxworks 6701 && !elf_vxworks_add_dynamic_entries (output_bfd, info)) 6702 return FALSE; 6703 } 6704#undef add_dynamic_entry 6705 6706 if (htab->glink_eh_frame != NULL 6707 && htab->glink_eh_frame->contents != NULL) 6708 { 6709 unsigned char *p = htab->glink_eh_frame->contents; 6710 bfd_vma val; 6711 6712 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); 6713 /* CIE length (rewrite in case little-endian). */ 6714 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p); 6715 p += sizeof (glink_eh_frame_cie); 6716 /* FDE length. */ 6717 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie); 6718 bfd_put_32 (htab->elf.dynobj, val, p); 6719 p += 4; 6720 /* CIE pointer. */ 6721 val = p - htab->glink_eh_frame->contents; 6722 bfd_put_32 (htab->elf.dynobj, val, p); 6723 p += 4; 6724 /* Offset to .glink. Set later. */ 6725 p += 4; 6726 /* .glink size. */ 6727 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p); 6728 p += 4; 6729 /* Augmentation. */ 6730 p += 1; 6731 6732 if (bfd_link_pic (info) 6733 && htab->elf.dynamic_sections_created) 6734 { 6735 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2; 6736 if (adv < 64) 6737 *p++ = DW_CFA_advance_loc + adv; 6738 else if (adv < 256) 6739 { 6740 *p++ = DW_CFA_advance_loc1; 6741 *p++ = adv; 6742 } 6743 else if (adv < 65536) 6744 { 6745 *p++ = DW_CFA_advance_loc2; 6746 bfd_put_16 (htab->elf.dynobj, adv, p); 6747 p += 2; 6748 } 6749 else 6750 { 6751 *p++ = DW_CFA_advance_loc4; 6752 bfd_put_32 (htab->elf.dynobj, adv, p); 6753 p += 4; 6754 } 6755 *p++ = DW_CFA_register; 6756 *p++ = 65; 6757 p++; 6758 *p++ = DW_CFA_advance_loc + 4; 6759 *p++ = DW_CFA_restore_extended; 6760 *p++ = 65; 6761 } 6762 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4) 6763 == htab->glink_eh_frame->size); 6764 } 6765 6766 return TRUE; 6767} 6768 6769/* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output 6770 if it looks like nothing is using them. */ 6771 6772static void 6773maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect) 6774{ 6775 struct elf_link_hash_entry *sda = lsect->sym; 6776 6777 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1) 6778 { 6779 asection *s; 6780 6781 s = bfd_get_section_by_name (output_bfd, lsect->name); 6782 if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) 6783 { 6784 s = bfd_get_section_by_name (output_bfd, lsect->bss_name); 6785 if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) 6786 { 6787 sda->def_regular = 0; 6788 /* This is somewhat magic. See elf_link_output_extsym. */ 6789 sda->ref_dynamic = 1; 6790 sda->forced_local = 0; 6791 } 6792 } 6793 } 6794} 6795 6796void 6797ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info) 6798{ 6799 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 6800 6801 if (htab != NULL) 6802 { 6803 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]); 6804 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]); 6805 } 6806} 6807 6808 6809/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 6810 6811static bfd_boolean 6812ppc_elf_hash_symbol (struct elf_link_hash_entry *h) 6813{ 6814 if (h->plt.plist != NULL 6815 && !h->def_regular 6816 && (!h->pointer_equality_needed 6817 || !h->ref_regular_nonweak)) 6818 return FALSE; 6819 6820 return _bfd_elf_hash_symbol (h); 6821} 6822 6823#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 6824 6825/* Relaxation trampolines. r12 is available for clobbering (r11, is 6826 used for some functions that are allowed to break the ABI). */ 6827static const int shared_stub_entry[] = 6828 { 6829 0x7c0802a6, /* mflr 0 */ 6830 0x429f0005, /* bcl 20, 31, .Lxxx */ 6831 0x7d8802a6, /* mflr 12 */ 6832 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */ 6833 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */ 6834 0x7c0803a6, /* mtlr 0 */ 6835 0x7d8903a6, /* mtctr 12 */ 6836 0x4e800420, /* bctr */ 6837 }; 6838 6839static const int stub_entry[] = 6840 { 6841 0x3d800000, /* lis 12,xxx@ha */ 6842 0x398c0000, /* addi 12,12,xxx@l */ 6843 0x7d8903a6, /* mtctr 12 */ 6844 0x4e800420, /* bctr */ 6845 }; 6846 6847struct ppc_elf_relax_info 6848{ 6849 unsigned int workaround_size; 6850 unsigned int picfixup_size; 6851}; 6852 6853/* This function implements long branch trampolines, and the ppc476 6854 icache bug workaround. Any section needing trampolines or patch 6855 space for the workaround has its size extended so that we can 6856 add trampolines at the end of the section. */ 6857 6858static bfd_boolean 6859ppc_elf_relax_section (bfd *abfd, 6860 asection *isec, 6861 struct bfd_link_info *link_info, 6862 bfd_boolean *again) 6863{ 6864 struct one_branch_fixup 6865 { 6866 struct one_branch_fixup *next; 6867 asection *tsec; 6868 /* Final link, can use the symbol offset. For a 6869 relocatable link we use the symbol's index. */ 6870 bfd_vma toff; 6871 bfd_vma trampoff; 6872 }; 6873 6874 Elf_Internal_Shdr *symtab_hdr; 6875 bfd_byte *contents = NULL; 6876 Elf_Internal_Sym *isymbuf = NULL; 6877 Elf_Internal_Rela *internal_relocs = NULL; 6878 Elf_Internal_Rela *irel, *irelend = NULL; 6879 struct one_branch_fixup *branch_fixups = NULL; 6880 struct ppc_elf_relax_info *relax_info = NULL; 6881 unsigned changes = 0; 6882 bfd_boolean workaround_change; 6883 struct ppc_elf_link_hash_table *htab; 6884 bfd_size_type trampbase, trampoff, newsize, picfixup_size; 6885 asection *got2; 6886 bfd_boolean maybe_pasted; 6887 6888 *again = FALSE; 6889 6890 /* No need to do anything with non-alloc or non-code sections. */ 6891 if ((isec->flags & SEC_ALLOC) == 0 6892 || (isec->flags & SEC_CODE) == 0 6893 || (isec->flags & SEC_LINKER_CREATED) != 0 6894 || isec->size < 4) 6895 return TRUE; 6896 6897 /* We cannot represent the required PIC relocs in the output, so don't 6898 do anything. The linker doesn't support mixing -shared and -r 6899 anyway. */ 6900 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info)) 6901 return TRUE; 6902 6903 htab = ppc_elf_hash_table (link_info); 6904 if (htab == NULL) 6905 return TRUE; 6906 6907 isec->size = (isec->size + 3) & -4; 6908 if (isec->rawsize == 0) 6909 isec->rawsize = isec->size; 6910 trampbase = isec->size; 6911 6912 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE 6913 || isec->sec_info_type == SEC_INFO_TYPE_TARGET); 6914 isec->sec_info_type = SEC_INFO_TYPE_TARGET; 6915 6916 if (htab->params->ppc476_workaround 6917 || htab->params->pic_fixup > 0) 6918 { 6919 if (elf_section_data (isec)->sec_info == NULL) 6920 { 6921 elf_section_data (isec)->sec_info 6922 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info)); 6923 if (elf_section_data (isec)->sec_info == NULL) 6924 return FALSE; 6925 } 6926 relax_info = elf_section_data (isec)->sec_info; 6927 trampbase -= relax_info->workaround_size; 6928 } 6929 6930 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0 6931 || strcmp (isec->output_section->name, ".fini") == 0); 6932 /* Space for a branch around any trampolines. */ 6933 trampoff = trampbase; 6934 if (maybe_pasted && trampbase == isec->rawsize) 6935 trampoff += 4; 6936 6937 symtab_hdr = &elf_symtab_hdr (abfd); 6938 picfixup_size = 0; 6939 if (htab->params->branch_trampolines 6940 || htab->params->pic_fixup > 0) 6941 { 6942 /* Get a copy of the native relocations. */ 6943 if (isec->reloc_count != 0) 6944 { 6945 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, 6946 link_info->keep_memory); 6947 if (internal_relocs == NULL) 6948 goto error_return; 6949 } 6950 6951 got2 = bfd_get_section_by_name (abfd, ".got2"); 6952 6953 irelend = internal_relocs + isec->reloc_count; 6954 for (irel = internal_relocs; irel < irelend; irel++) 6955 { 6956 unsigned long r_type = ELF32_R_TYPE (irel->r_info); 6957 bfd_vma toff, roff; 6958 asection *tsec; 6959 struct one_branch_fixup *f; 6960 size_t insn_offset = 0; 6961 bfd_vma max_branch_offset = 0, val; 6962 bfd_byte *hit_addr; 6963 unsigned long t0; 6964 struct elf_link_hash_entry *h; 6965 struct plt_entry **plist; 6966 unsigned char sym_type; 6967 6968 switch (r_type) 6969 { 6970 case R_PPC_REL24: 6971 case R_PPC_LOCAL24PC: 6972 case R_PPC_PLTREL24: 6973 max_branch_offset = 1 << 25; 6974 break; 6975 6976 case R_PPC_REL14: 6977 case R_PPC_REL14_BRTAKEN: 6978 case R_PPC_REL14_BRNTAKEN: 6979 max_branch_offset = 1 << 15; 6980 break; 6981 6982 case R_PPC_ADDR16_HA: 6983 if (htab->params->pic_fixup > 0) 6984 break; 6985 continue; 6986 6987 default: 6988 continue; 6989 } 6990 6991 /* Get the value of the symbol referred to by the reloc. */ 6992 h = NULL; 6993 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 6994 { 6995 /* A local symbol. */ 6996 Elf_Internal_Sym *isym; 6997 6998 /* Read this BFD's local symbols. */ 6999 if (isymbuf == NULL) 7000 { 7001 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 7002 if (isymbuf == NULL) 7003 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 7004 symtab_hdr->sh_info, 0, 7005 NULL, NULL, NULL); 7006 if (isymbuf == 0) 7007 goto error_return; 7008 } 7009 isym = isymbuf + ELF32_R_SYM (irel->r_info); 7010 if (isym->st_shndx == SHN_UNDEF) 7011 tsec = bfd_und_section_ptr; 7012 else if (isym->st_shndx == SHN_ABS) 7013 tsec = bfd_abs_section_ptr; 7014 else if (isym->st_shndx == SHN_COMMON) 7015 tsec = bfd_com_section_ptr; 7016 else 7017 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 7018 7019 toff = isym->st_value; 7020 sym_type = ELF_ST_TYPE (isym->st_info); 7021 } 7022 else 7023 { 7024 /* Global symbol handling. */ 7025 unsigned long indx; 7026 7027 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 7028 h = elf_sym_hashes (abfd)[indx]; 7029 7030 while (h->root.type == bfd_link_hash_indirect 7031 || h->root.type == bfd_link_hash_warning) 7032 h = (struct elf_link_hash_entry *) h->root.u.i.link; 7033 7034 if (h->root.type == bfd_link_hash_defined 7035 || h->root.type == bfd_link_hash_defweak) 7036 { 7037 tsec = h->root.u.def.section; 7038 toff = h->root.u.def.value; 7039 } 7040 else if (h->root.type == bfd_link_hash_undefined 7041 || h->root.type == bfd_link_hash_undefweak) 7042 { 7043 tsec = bfd_und_section_ptr; 7044 toff = bfd_link_relocatable (link_info) ? indx : 0; 7045 } 7046 else 7047 continue; 7048 7049 /* If this branch is to __tls_get_addr then we may later 7050 optimise away the call. We won't be needing a long- 7051 branch stub in that case. */ 7052 if (bfd_link_executable (link_info) 7053 && h == htab->tls_get_addr 7054 && irel != internal_relocs) 7055 { 7056 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info); 7057 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info); 7058 unsigned int tls_mask = 0; 7059 7060 /* The previous reloc should be one of R_PPC_TLSGD or 7061 R_PPC_TLSLD, or for older object files, a reloc 7062 on the __tls_get_addr arg setup insn. Get tls 7063 mask bits from the symbol on that reloc. */ 7064 if (t_symndx < symtab_hdr->sh_info) 7065 { 7066 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); 7067 7068 if (local_got_offsets != NULL) 7069 { 7070 struct plt_entry **local_plt = (struct plt_entry **) 7071 (local_got_offsets + symtab_hdr->sh_info); 7072 char *lgot_masks = (char *) 7073 (local_plt + symtab_hdr->sh_info); 7074 tls_mask = lgot_masks[t_symndx]; 7075 } 7076 } 7077 else 7078 { 7079 struct elf_link_hash_entry *th 7080 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info]; 7081 7082 while (th->root.type == bfd_link_hash_indirect 7083 || th->root.type == bfd_link_hash_warning) 7084 th = (struct elf_link_hash_entry *) th->root.u.i.link; 7085 7086 tls_mask 7087 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask; 7088 } 7089 7090 /* The mask bits tell us if the call will be 7091 optimised away. */ 7092 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 7093 && (t_rtype == R_PPC_TLSGD 7094 || t_rtype == R_PPC_GOT_TLSGD16 7095 || t_rtype == R_PPC_GOT_TLSGD16_LO)) 7096 continue; 7097 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 7098 && (t_rtype == R_PPC_TLSLD 7099 || t_rtype == R_PPC_GOT_TLSLD16 7100 || t_rtype == R_PPC_GOT_TLSLD16_LO)) 7101 continue; 7102 } 7103 7104 sym_type = h->type; 7105 } 7106 7107 if (r_type == R_PPC_ADDR16_HA) 7108 { 7109 if (h != NULL 7110 && !h->def_regular 7111 && h->protected_def 7112 && ppc_elf_hash_entry (h)->has_addr16_ha 7113 && ppc_elf_hash_entry (h)->has_addr16_lo) 7114 picfixup_size += 12; 7115 continue; 7116 } 7117 7118 /* The condition here under which we call find_plt_ent must 7119 match that in relocate_section. If we call find_plt_ent here 7120 but not in relocate_section, or vice versa, then the branch 7121 destination used here may be incorrect. */ 7122 plist = NULL; 7123 if (h != NULL) 7124 { 7125 /* We know is_branch_reloc (r_type) is true. */ 7126 if (h->type == STT_GNU_IFUNC 7127 || r_type == R_PPC_PLTREL24) 7128 plist = &h->plt.plist; 7129 } 7130 else if (sym_type == STT_GNU_IFUNC 7131 && elf_local_got_offsets (abfd) != NULL) 7132 { 7133 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); 7134 struct plt_entry **local_plt = (struct plt_entry **) 7135 (local_got_offsets + symtab_hdr->sh_info); 7136 plist = local_plt + ELF32_R_SYM (irel->r_info); 7137 } 7138 if (plist != NULL) 7139 { 7140 bfd_vma addend = 0; 7141 struct plt_entry *ent; 7142 7143 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info)) 7144 addend = irel->r_addend; 7145 ent = find_plt_ent (plist, got2, addend); 7146 if (ent != NULL) 7147 { 7148 if (htab->plt_type == PLT_NEW 7149 || h == NULL 7150 || !htab->elf.dynamic_sections_created 7151 || h->dynindx == -1) 7152 { 7153 tsec = htab->glink; 7154 toff = ent->glink_offset; 7155 } 7156 else 7157 { 7158 tsec = htab->plt; 7159 toff = ent->plt.offset; 7160 } 7161 } 7162 } 7163 7164 /* If the branch and target are in the same section, you have 7165 no hope of adding stubs. We'll error out later should the 7166 branch overflow. */ 7167 if (tsec == isec) 7168 continue; 7169 7170 /* There probably isn't any reason to handle symbols in 7171 SEC_MERGE sections; SEC_MERGE doesn't seem a likely 7172 attribute for a code section, and we are only looking at 7173 branches. However, implement it correctly here as a 7174 reference for other target relax_section functions. */ 7175 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE) 7176 { 7177 /* At this stage in linking, no SEC_MERGE symbol has been 7178 adjusted, so all references to such symbols need to be 7179 passed through _bfd_merged_section_offset. (Later, in 7180 relocate_section, all SEC_MERGE symbols *except* for 7181 section symbols have been adjusted.) 7182 7183 gas may reduce relocations against symbols in SEC_MERGE 7184 sections to a relocation against the section symbol when 7185 the original addend was zero. When the reloc is against 7186 a section symbol we should include the addend in the 7187 offset passed to _bfd_merged_section_offset, since the 7188 location of interest is the original symbol. On the 7189 other hand, an access to "sym+addend" where "sym" is not 7190 a section symbol should not include the addend; Such an 7191 access is presumed to be an offset from "sym"; The 7192 location of interest is just "sym". */ 7193 if (sym_type == STT_SECTION) 7194 toff += irel->r_addend; 7195 7196 toff 7197 = _bfd_merged_section_offset (abfd, &tsec, 7198 elf_section_data (tsec)->sec_info, 7199 toff); 7200 7201 if (sym_type != STT_SECTION) 7202 toff += irel->r_addend; 7203 } 7204 /* PLTREL24 addends are special. */ 7205 else if (r_type != R_PPC_PLTREL24) 7206 toff += irel->r_addend; 7207 7208 /* Attempted -shared link of non-pic code loses. */ 7209 if ((!bfd_link_relocatable (link_info) 7210 && tsec == bfd_und_section_ptr) 7211 || tsec->output_section == NULL 7212 || (tsec->owner != NULL 7213 && (tsec->owner->flags & BFD_PLUGIN) != 0)) 7214 continue; 7215 7216 roff = irel->r_offset; 7217 7218 /* If the branch is in range, no need to do anything. */ 7219 if (tsec != bfd_und_section_ptr 7220 && (!bfd_link_relocatable (link_info) 7221 /* A relocatable link may have sections moved during 7222 final link, so do not presume they remain in range. */ 7223 || tsec->output_section == isec->output_section)) 7224 { 7225 bfd_vma symaddr, reladdr; 7226 7227 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 7228 reladdr = isec->output_section->vma + isec->output_offset + roff; 7229 if (symaddr - reladdr + max_branch_offset 7230 < 2 * max_branch_offset) 7231 continue; 7232 } 7233 7234 /* Look for an existing fixup to this address. */ 7235 for (f = branch_fixups; f ; f = f->next) 7236 if (f->tsec == tsec && f->toff == toff) 7237 break; 7238 7239 if (f == NULL) 7240 { 7241 size_t size; 7242 unsigned long stub_rtype; 7243 7244 val = trampoff - roff; 7245 if (val >= max_branch_offset) 7246 /* Oh dear, we can't reach a trampoline. Don't try to add 7247 one. We'll report an error later. */ 7248 continue; 7249 7250 if (bfd_link_pic (link_info)) 7251 { 7252 size = 4 * ARRAY_SIZE (shared_stub_entry); 7253 insn_offset = 12; 7254 } 7255 else 7256 { 7257 size = 4 * ARRAY_SIZE (stub_entry); 7258 insn_offset = 0; 7259 } 7260 stub_rtype = R_PPC_RELAX; 7261 if (tsec == htab->plt 7262 || tsec == htab->glink) 7263 { 7264 stub_rtype = R_PPC_RELAX_PLT; 7265 if (r_type == R_PPC_PLTREL24) 7266 stub_rtype = R_PPC_RELAX_PLTREL24; 7267 } 7268 7269 /* Hijack the old relocation. Since we need two 7270 relocations for this use a "composite" reloc. */ 7271 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 7272 stub_rtype); 7273 irel->r_offset = trampoff + insn_offset; 7274 if (r_type == R_PPC_PLTREL24 7275 && stub_rtype != R_PPC_RELAX_PLTREL24) 7276 irel->r_addend = 0; 7277 7278 /* Record the fixup so we don't do it again this section. */ 7279 f = bfd_malloc (sizeof (*f)); 7280 f->next = branch_fixups; 7281 f->tsec = tsec; 7282 f->toff = toff; 7283 f->trampoff = trampoff; 7284 branch_fixups = f; 7285 7286 trampoff += size; 7287 changes++; 7288 } 7289 else 7290 { 7291 val = f->trampoff - roff; 7292 if (val >= max_branch_offset) 7293 continue; 7294 7295 /* Nop out the reloc, since we're finalizing things here. */ 7296 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 7297 } 7298 7299 /* Get the section contents. */ 7300 if (contents == NULL) 7301 { 7302 /* Get cached copy if it exists. */ 7303 if (elf_section_data (isec)->this_hdr.contents != NULL) 7304 contents = elf_section_data (isec)->this_hdr.contents; 7305 /* Go get them off disk. */ 7306 else if (!bfd_malloc_and_get_section (abfd, isec, &contents)) 7307 goto error_return; 7308 } 7309 7310 /* Fix up the existing branch to hit the trampoline. */ 7311 hit_addr = contents + roff; 7312 switch (r_type) 7313 { 7314 case R_PPC_REL24: 7315 case R_PPC_LOCAL24PC: 7316 case R_PPC_PLTREL24: 7317 t0 = bfd_get_32 (abfd, hit_addr); 7318 t0 &= ~0x3fffffc; 7319 t0 |= val & 0x3fffffc; 7320 bfd_put_32 (abfd, t0, hit_addr); 7321 break; 7322 7323 case R_PPC_REL14: 7324 case R_PPC_REL14_BRTAKEN: 7325 case R_PPC_REL14_BRNTAKEN: 7326 t0 = bfd_get_32 (abfd, hit_addr); 7327 t0 &= ~0xfffc; 7328 t0 |= val & 0xfffc; 7329 bfd_put_32 (abfd, t0, hit_addr); 7330 break; 7331 } 7332 } 7333 7334 while (branch_fixups != NULL) 7335 { 7336 struct one_branch_fixup *f = branch_fixups; 7337 branch_fixups = branch_fixups->next; 7338 free (f); 7339 } 7340 } 7341 7342 workaround_change = FALSE; 7343 newsize = trampoff; 7344 if (htab->params->ppc476_workaround 7345 && (!bfd_link_relocatable (link_info) 7346 || isec->output_section->alignment_power >= htab->params->pagesize_p2)) 7347 { 7348 bfd_vma addr, end_addr; 7349 unsigned int crossings; 7350 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 7351 7352 addr = isec->output_section->vma + isec->output_offset; 7353 end_addr = addr + trampoff; 7354 addr &= -pagesize; 7355 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2; 7356 if (crossings != 0) 7357 { 7358 /* Keep space aligned, to ensure the patch code itself does 7359 not cross a page. Don't decrease size calculated on a 7360 previous pass as otherwise we might never settle on a layout. */ 7361 newsize = 15 - ((end_addr - 1) & 15); 7362 newsize += crossings * 16; 7363 if (relax_info->workaround_size < newsize) 7364 { 7365 relax_info->workaround_size = newsize; 7366 workaround_change = TRUE; 7367 } 7368 /* Ensure relocate_section is called. */ 7369 isec->flags |= SEC_RELOC; 7370 } 7371 newsize = trampoff + relax_info->workaround_size; 7372 } 7373 7374 if (htab->params->pic_fixup > 0) 7375 { 7376 picfixup_size -= relax_info->picfixup_size; 7377 if (picfixup_size != 0) 7378 relax_info->picfixup_size += picfixup_size; 7379 newsize += relax_info->picfixup_size; 7380 } 7381 7382 if (changes != 0 || picfixup_size != 0 || workaround_change) 7383 isec->size = newsize; 7384 7385 if (isymbuf != NULL 7386 && symtab_hdr->contents != (unsigned char *) isymbuf) 7387 { 7388 if (! link_info->keep_memory) 7389 free (isymbuf); 7390 else 7391 { 7392 /* Cache the symbols for elf_link_input_bfd. */ 7393 symtab_hdr->contents = (unsigned char *) isymbuf; 7394 } 7395 } 7396 7397 if (contents != NULL 7398 && elf_section_data (isec)->this_hdr.contents != contents) 7399 { 7400 if (!changes && !link_info->keep_memory) 7401 free (contents); 7402 else 7403 { 7404 /* Cache the section contents for elf_link_input_bfd. */ 7405 elf_section_data (isec)->this_hdr.contents = contents; 7406 } 7407 } 7408 7409 changes += picfixup_size; 7410 if (changes != 0) 7411 { 7412 /* Append sufficient NOP relocs so we can write out relocation 7413 information for the trampolines. */ 7414 Elf_Internal_Shdr *rel_hdr; 7415 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count) 7416 * sizeof (*new_relocs)); 7417 unsigned ix; 7418 7419 if (!new_relocs) 7420 goto error_return; 7421 memcpy (new_relocs, internal_relocs, 7422 isec->reloc_count * sizeof (*new_relocs)); 7423 for (ix = changes; ix--;) 7424 { 7425 irel = new_relocs + ix + isec->reloc_count; 7426 7427 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 7428 } 7429 if (internal_relocs != elf_section_data (isec)->relocs) 7430 free (internal_relocs); 7431 elf_section_data (isec)->relocs = new_relocs; 7432 isec->reloc_count += changes; 7433 rel_hdr = _bfd_elf_single_rel_hdr (isec); 7434 rel_hdr->sh_size += changes * rel_hdr->sh_entsize; 7435 } 7436 else if (internal_relocs != NULL 7437 && elf_section_data (isec)->relocs != internal_relocs) 7438 free (internal_relocs); 7439 7440 *again = changes != 0 || workaround_change; 7441 return TRUE; 7442 7443 error_return: 7444 while (branch_fixups != NULL) 7445 { 7446 struct one_branch_fixup *f = branch_fixups; 7447 branch_fixups = branch_fixups->next; 7448 free (f); 7449 } 7450 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 7451 free (isymbuf); 7452 if (contents != NULL 7453 && elf_section_data (isec)->this_hdr.contents != contents) 7454 free (contents); 7455 if (internal_relocs != NULL 7456 && elf_section_data (isec)->relocs != internal_relocs) 7457 free (internal_relocs); 7458 return FALSE; 7459} 7460 7461/* What to do when ld finds relocations against symbols defined in 7462 discarded sections. */ 7463 7464static unsigned int 7465ppc_elf_action_discarded (asection *sec) 7466{ 7467 if (strcmp (".fixup", sec->name) == 0) 7468 return 0; 7469 7470 if (strcmp (".got2", sec->name) == 0) 7471 return 0; 7472 7473 return _bfd_elf_default_action_discarded (sec); 7474} 7475 7476/* Fill in the address for a pointer generated in a linker section. */ 7477 7478static bfd_vma 7479elf_finish_pointer_linker_section (bfd *input_bfd, 7480 elf_linker_section_t *lsect, 7481 struct elf_link_hash_entry *h, 7482 bfd_vma relocation, 7483 const Elf_Internal_Rela *rel) 7484{ 7485 elf_linker_section_pointers_t *linker_section_ptr; 7486 7487 BFD_ASSERT (lsect != NULL); 7488 7489 if (h != NULL) 7490 { 7491 /* Handle global symbol. */ 7492 struct ppc_elf_link_hash_entry *eh; 7493 7494 eh = (struct ppc_elf_link_hash_entry *) h; 7495 BFD_ASSERT (eh->elf.def_regular); 7496 linker_section_ptr = eh->linker_section_pointer; 7497 } 7498 else 7499 { 7500 /* Handle local symbol. */ 7501 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 7502 7503 BFD_ASSERT (is_ppc_elf (input_bfd)); 7504 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); 7505 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; 7506 } 7507 7508 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, 7509 rel->r_addend, 7510 lsect); 7511 BFD_ASSERT (linker_section_ptr != NULL); 7512 7513 /* Offset will always be a multiple of four, so use the bottom bit 7514 as a "written" flag. */ 7515 if ((linker_section_ptr->offset & 1) == 0) 7516 { 7517 bfd_put_32 (lsect->section->owner, 7518 relocation + linker_section_ptr->addend, 7519 lsect->section->contents + linker_section_ptr->offset); 7520 linker_section_ptr->offset += 1; 7521 } 7522 7523 relocation = (lsect->section->output_section->vma 7524 + lsect->section->output_offset 7525 + linker_section_ptr->offset - 1 7526 - SYM_VAL (lsect->sym)); 7527 7528#ifdef DEBUG 7529 fprintf (stderr, 7530 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", 7531 lsect->name, (long) relocation, (long) relocation); 7532#endif 7533 7534 return relocation; 7535} 7536 7537#define PPC_LO(v) ((v) & 0xffff) 7538#define PPC_HI(v) (((v) >> 16) & 0xffff) 7539#define PPC_HA(v) PPC_HI ((v) + 0x8000) 7540 7541static void 7542write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p, 7543 struct bfd_link_info *info) 7544{ 7545 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 7546 bfd *output_bfd = info->output_bfd; 7547 bfd_vma plt; 7548 7549 plt = ((ent->plt.offset & ~1) 7550 + plt_sec->output_section->vma 7551 + plt_sec->output_offset); 7552 7553 if (bfd_link_pic (info)) 7554 { 7555 bfd_vma got = 0; 7556 7557 if (ent->addend >= 32768) 7558 got = (ent->addend 7559 + ent->sec->output_section->vma 7560 + ent->sec->output_offset); 7561 else if (htab->elf.hgot != NULL) 7562 got = SYM_VAL (htab->elf.hgot); 7563 7564 plt -= got; 7565 7566 if (plt + 0x8000 < 0x10000) 7567 { 7568 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); 7569 p += 4; 7570 bfd_put_32 (output_bfd, MTCTR_11, p); 7571 p += 4; 7572 bfd_put_32 (output_bfd, BCTR, p); 7573 p += 4; 7574 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p); 7575 p += 4; 7576 } 7577 else 7578 { 7579 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); 7580 p += 4; 7581 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7582 p += 4; 7583 bfd_put_32 (output_bfd, MTCTR_11, p); 7584 p += 4; 7585 bfd_put_32 (output_bfd, BCTR, p); 7586 p += 4; 7587 } 7588 } 7589 else 7590 { 7591 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); 7592 p += 4; 7593 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7594 p += 4; 7595 bfd_put_32 (output_bfd, MTCTR_11, p); 7596 p += 4; 7597 bfd_put_32 (output_bfd, BCTR, p); 7598 p += 4; 7599 } 7600} 7601 7602/* Return true if symbol is defined statically. */ 7603 7604static bfd_boolean 7605is_static_defined (struct elf_link_hash_entry *h) 7606{ 7607 return ((h->root.type == bfd_link_hash_defined 7608 || h->root.type == bfd_link_hash_defweak) 7609 && h->root.u.def.section != NULL 7610 && h->root.u.def.section->output_section != NULL); 7611} 7612 7613/* If INSN is an opcode that may be used with an @tls operand, return 7614 the transformed insn for TLS optimisation, otherwise return 0. If 7615 REG is non-zero only match an insn with RB or RA equal to REG. */ 7616 7617unsigned int 7618_bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg) 7619{ 7620 unsigned int rtra; 7621 7622 if ((insn & (0x3f << 26)) != 31 << 26) 7623 return 0; 7624 7625 if (reg == 0 || ((insn >> 11) & 0x1f) == reg) 7626 rtra = insn & ((1 << 26) - (1 << 16)); 7627 else if (((insn >> 16) & 0x1f) == reg) 7628 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); 7629 else 7630 return 0; 7631 7632 if ((insn & (0x3ff << 1)) == 266 << 1) 7633 /* add -> addi. */ 7634 insn = 14 << 26; 7635 else if ((insn & (0x1f << 1)) == 23 << 1 7636 && ((insn & (0x1f << 6)) < 14 << 6 7637 || ((insn & (0x1f << 6)) >= 16 << 6 7638 && (insn & (0x1f << 6)) < 24 << 6))) 7639 /* load and store indexed -> dform. */ 7640 insn = (32 | ((insn >> 6) & 0x1f)) << 26; 7641 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) 7642 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ 7643 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); 7644 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) 7645 /* lwax -> lwa. */ 7646 insn = (58 << 26) | 2; 7647 else 7648 return 0; 7649 insn |= rtra; 7650 return insn; 7651} 7652 7653/* If INSN is an opcode that may be used with an @tprel operand, return 7654 the transformed insn for an undefined weak symbol, ie. with the 7655 thread pointer REG operand removed. Otherwise return 0. */ 7656 7657unsigned int 7658_bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) 7659{ 7660 if ((insn & (0x1f << 16)) == reg << 16 7661 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 7662 || (insn & (0x3f << 26)) == 15u << 26 /* addis */ 7663 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 7664 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 7665 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 7666 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 7667 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 7668 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 7669 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 7670 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 7671 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 7672 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 7673 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 7674 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 7675 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 7676 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 7677 && (insn & 3) != 1) 7678 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 7679 && ((insn & 3) == 0 || (insn & 3) == 3)))) 7680 { 7681 insn &= ~(0x1f << 16); 7682 } 7683 else if ((insn & (0x1f << 21)) == reg << 21 7684 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */ 7685 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */ 7686 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */)) 7687 { 7688 insn &= ~(0x1f << 21); 7689 insn |= (insn & (0x1f << 16)) << 5; 7690 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */) 7691 insn -= 2 >> 26; /* convert to ori,oris */ 7692 } 7693 else 7694 insn = 0; 7695 return insn; 7696} 7697 7698static bfd_boolean 7699is_insn_ds_form (unsigned int insn) 7700{ 7701 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ 7702 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ 7703 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ 7704 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */); 7705} 7706 7707static bfd_boolean 7708is_insn_dq_form (unsigned int insn) 7709{ 7710 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */ 7711 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ 7712 && (insn & 3) == 1)); 7713} 7714 7715/* The RELOCATE_SECTION function is called by the ELF backend linker 7716 to handle the relocations for a section. 7717 7718 The relocs are always passed as Rela structures; if the section 7719 actually uses Rel structures, the r_addend field will always be 7720 zero. 7721 7722 This function is responsible for adjust the section contents as 7723 necessary, and (if using Rela relocs and generating a 7724 relocatable output file) adjusting the reloc addend as 7725 necessary. 7726 7727 This function does not have to worry about setting the reloc 7728 address or the reloc symbol index. 7729 7730 LOCAL_SYMS is a pointer to the swapped in local symbols. 7731 7732 LOCAL_SECTIONS is an array giving the section in the input file 7733 corresponding to the st_shndx field of each local symbol. 7734 7735 The global hash table entry for the global symbols can be found 7736 via elf_sym_hashes (input_bfd). 7737 7738 When generating relocatable output, this function must handle 7739 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 7740 going to be the section symbol corresponding to the output 7741 section, which means that the addend must be adjusted 7742 accordingly. */ 7743 7744static bfd_boolean 7745ppc_elf_relocate_section (bfd *output_bfd, 7746 struct bfd_link_info *info, 7747 bfd *input_bfd, 7748 asection *input_section, 7749 bfd_byte *contents, 7750 Elf_Internal_Rela *relocs, 7751 Elf_Internal_Sym *local_syms, 7752 asection **local_sections) 7753{ 7754 Elf_Internal_Shdr *symtab_hdr; 7755 struct elf_link_hash_entry **sym_hashes; 7756 struct ppc_elf_link_hash_table *htab; 7757 Elf_Internal_Rela *rel; 7758 Elf_Internal_Rela *wrel; 7759 Elf_Internal_Rela *relend; 7760 Elf_Internal_Rela outrel; 7761 asection *got2; 7762 bfd_vma *local_got_offsets; 7763 bfd_boolean ret = TRUE; 7764 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); 7765 bfd_boolean is_vxworks_tls; 7766 unsigned int picfixup_size = 0; 7767 struct ppc_elf_relax_info *relax_info = NULL; 7768 7769#ifdef DEBUG 7770 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " 7771 "%ld relocations%s", 7772 input_bfd, input_section, 7773 (long) input_section->reloc_count, 7774 (bfd_link_relocatable (info)) ? " (relocatable)" : ""); 7775#endif 7776 7777 got2 = bfd_get_section_by_name (input_bfd, ".got2"); 7778 7779 /* Initialize howto table if not already done. */ 7780 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 7781 ppc_elf_howto_init (); 7782 7783 htab = ppc_elf_hash_table (info); 7784 local_got_offsets = elf_local_got_offsets (input_bfd); 7785 symtab_hdr = &elf_symtab_hdr (input_bfd); 7786 sym_hashes = elf_sym_hashes (input_bfd); 7787 /* We have to handle relocations in vxworks .tls_vars sections 7788 specially, because the dynamic loader is 'weird'. */ 7789 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info) 7790 && !strcmp (input_section->output_section->name, 7791 ".tls_vars")); 7792 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET) 7793 relax_info = elf_section_data (input_section)->sec_info; 7794 rel = wrel = relocs; 7795 relend = relocs + input_section->reloc_count; 7796 for (; rel < relend; wrel++, rel++) 7797 { 7798 enum elf_ppc_reloc_type r_type; 7799 bfd_vma addend; 7800 bfd_reloc_status_type r; 7801 Elf_Internal_Sym *sym; 7802 asection *sec; 7803 struct elf_link_hash_entry *h; 7804 const char *sym_name; 7805 reloc_howto_type *howto; 7806 unsigned long r_symndx; 7807 bfd_vma relocation; 7808 bfd_vma branch_bit, from; 7809 bfd_boolean unresolved_reloc; 7810 bfd_boolean warned; 7811 unsigned int tls_type, tls_mask, tls_gd; 7812 struct plt_entry **ifunc; 7813 struct reloc_howto_struct alt_howto; 7814 7815 again: 7816 r_type = ELF32_R_TYPE (rel->r_info); 7817 sym = NULL; 7818 sec = NULL; 7819 h = NULL; 7820 unresolved_reloc = FALSE; 7821 warned = FALSE; 7822 r_symndx = ELF32_R_SYM (rel->r_info); 7823 7824 if (r_symndx < symtab_hdr->sh_info) 7825 { 7826 sym = local_syms + r_symndx; 7827 sec = local_sections[r_symndx]; 7828 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 7829 7830 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 7831 } 7832 else 7833 { 7834 bfd_boolean ignored; 7835 7836 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 7837 r_symndx, symtab_hdr, sym_hashes, 7838 h, sec, relocation, 7839 unresolved_reloc, warned, ignored); 7840 7841 sym_name = h->root.root.string; 7842 } 7843 7844 if (sec != NULL && discarded_section (sec)) 7845 { 7846 /* For relocs against symbols from removed linkonce sections, 7847 or sections discarded by a linker script, we just want the 7848 section contents zeroed. Avoid any special processing. */ 7849 howto = NULL; 7850 if (r_type < R_PPC_max) 7851 howto = ppc_elf_howto_table[r_type]; 7852 7853 _bfd_clear_contents (howto, input_bfd, input_section, 7854 contents + rel->r_offset); 7855 wrel->r_offset = rel->r_offset; 7856 wrel->r_info = 0; 7857 wrel->r_addend = 0; 7858 7859 /* For ld -r, remove relocations in debug sections against 7860 sections defined in discarded sections. Not done for 7861 non-debug to preserve relocs in .eh_frame which the 7862 eh_frame editing code expects to be present. */ 7863 if (bfd_link_relocatable (info) 7864 && (input_section->flags & SEC_DEBUGGING)) 7865 wrel--; 7866 7867 continue; 7868 } 7869 7870 if (bfd_link_relocatable (info)) 7871 { 7872 if (got2 != NULL 7873 && r_type == R_PPC_PLTREL24 7874 && rel->r_addend != 0) 7875 { 7876 /* R_PPC_PLTREL24 is rather special. If non-zero, the 7877 addend specifies the GOT pointer offset within .got2. */ 7878 rel->r_addend += got2->output_offset; 7879 } 7880 if (r_type != R_PPC_RELAX_PLT 7881 && r_type != R_PPC_RELAX_PLTREL24 7882 && r_type != R_PPC_RELAX) 7883 goto copy_reloc; 7884 } 7885 7886 /* TLS optimizations. Replace instruction sequences and relocs 7887 based on information we collected in tls_optimize. We edit 7888 RELOCS so that --emit-relocs will output something sensible 7889 for the final instruction stream. */ 7890 tls_mask = 0; 7891 tls_gd = 0; 7892 if (h != NULL) 7893 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; 7894 else if (local_got_offsets != NULL) 7895 { 7896 struct plt_entry **local_plt; 7897 char *lgot_masks; 7898 local_plt 7899 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info); 7900 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 7901 tls_mask = lgot_masks[r_symndx]; 7902 } 7903 7904 /* Ensure reloc mapping code below stays sane. */ 7905 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) 7906 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) 7907 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) 7908 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) 7909 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) 7910 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) 7911 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) 7912 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) 7913 abort (); 7914 switch (r_type) 7915 { 7916 default: 7917 break; 7918 7919 case R_PPC_GOT_TPREL16: 7920 case R_PPC_GOT_TPREL16_LO: 7921 if ((tls_mask & TLS_TLS) != 0 7922 && (tls_mask & TLS_TPREL) == 0) 7923 { 7924 bfd_vma insn; 7925 7926 insn = bfd_get_32 (output_bfd, 7927 contents + rel->r_offset - d_offset); 7928 insn &= 31 << 21; 7929 insn |= 0x3c020000; /* addis 0,2,0 */ 7930 bfd_put_32 (output_bfd, insn, 7931 contents + rel->r_offset - d_offset); 7932 r_type = R_PPC_TPREL16_HA; 7933 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7934 } 7935 break; 7936 7937 case R_PPC_TLS: 7938 if ((tls_mask & TLS_TLS) != 0 7939 && (tls_mask & TLS_TPREL) == 0) 7940 { 7941 bfd_vma insn; 7942 7943 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 7944 insn = _bfd_elf_ppc_at_tls_transform (insn, 2); 7945 if (insn == 0) 7946 abort (); 7947 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 7948 r_type = R_PPC_TPREL16_LO; 7949 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7950 7951 /* Was PPC_TLS which sits on insn boundary, now 7952 PPC_TPREL16_LO which is at low-order half-word. */ 7953 rel->r_offset += d_offset; 7954 } 7955 break; 7956 7957 case R_PPC_GOT_TLSGD16_HI: 7958 case R_PPC_GOT_TLSGD16_HA: 7959 tls_gd = TLS_TPRELGD; 7960 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 7961 goto tls_gdld_hi; 7962 break; 7963 7964 case R_PPC_GOT_TLSLD16_HI: 7965 case R_PPC_GOT_TLSLD16_HA: 7966 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 7967 { 7968 tls_gdld_hi: 7969 if ((tls_mask & tls_gd) != 0) 7970 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 7971 + R_PPC_GOT_TPREL16); 7972 else 7973 { 7974 rel->r_offset -= d_offset; 7975 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 7976 r_type = R_PPC_NONE; 7977 } 7978 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7979 } 7980 break; 7981 7982 case R_PPC_GOT_TLSGD16: 7983 case R_PPC_GOT_TLSGD16_LO: 7984 tls_gd = TLS_TPRELGD; 7985 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 7986 goto tls_ldgd_opt; 7987 break; 7988 7989 case R_PPC_GOT_TLSLD16: 7990 case R_PPC_GOT_TLSLD16_LO: 7991 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 7992 { 7993 unsigned int insn1, insn2; 7994 bfd_vma offset; 7995 7996 tls_ldgd_opt: 7997 offset = (bfd_vma) -1; 7998 /* If not using the newer R_PPC_TLSGD/LD to mark 7999 __tls_get_addr calls, we must trust that the call 8000 stays with its arg setup insns, ie. that the next 8001 reloc is the __tls_get_addr call associated with 8002 the current reloc. Edit both insns. */ 8003 if (input_section->has_tls_get_addr_call 8004 && rel + 1 < relend 8005 && branch_reloc_hash_match (input_bfd, rel + 1, 8006 htab->tls_get_addr)) 8007 offset = rel[1].r_offset; 8008 /* We read the low GOT_TLS insn because we need to keep 8009 the destination reg. It may be something other than 8010 the usual r3, and moved to r3 before the call by 8011 intervening code. */ 8012 insn1 = bfd_get_32 (output_bfd, 8013 contents + rel->r_offset - d_offset); 8014 if ((tls_mask & tls_gd) != 0) 8015 { 8016 /* IE */ 8017 insn1 &= (0x1f << 21) | (0x1f << 16); 8018 insn1 |= 32 << 26; /* lwz */ 8019 if (offset != (bfd_vma) -1) 8020 { 8021 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8022 insn2 = 0x7c631214; /* add 3,3,2 */ 8023 bfd_put_32 (output_bfd, insn2, contents + offset); 8024 } 8025 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 8026 + R_PPC_GOT_TPREL16); 8027 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8028 } 8029 else 8030 { 8031 /* LE */ 8032 insn1 &= 0x1f << 21; 8033 insn1 |= 0x3c020000; /* addis r,2,0 */ 8034 if (tls_gd == 0) 8035 { 8036 /* Was an LD reloc. */ 8037 for (r_symndx = 0; 8038 r_symndx < symtab_hdr->sh_info; 8039 r_symndx++) 8040 if (local_sections[r_symndx] == sec) 8041 break; 8042 if (r_symndx >= symtab_hdr->sh_info) 8043 r_symndx = STN_UNDEF; 8044 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 8045 if (r_symndx != STN_UNDEF) 8046 rel->r_addend -= (local_syms[r_symndx].st_value 8047 + sec->output_offset 8048 + sec->output_section->vma); 8049 } 8050 r_type = R_PPC_TPREL16_HA; 8051 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8052 if (offset != (bfd_vma) -1) 8053 { 8054 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 8055 rel[1].r_offset = offset + d_offset; 8056 rel[1].r_addend = rel->r_addend; 8057 insn2 = 0x38630000; /* addi 3,3,0 */ 8058 bfd_put_32 (output_bfd, insn2, contents + offset); 8059 } 8060 } 8061 bfd_put_32 (output_bfd, insn1, 8062 contents + rel->r_offset - d_offset); 8063 if (tls_gd == 0) 8064 { 8065 /* We changed the symbol on an LD reloc. Start over 8066 in order to get h, sym, sec etc. right. */ 8067 goto again; 8068 } 8069 } 8070 break; 8071 8072 case R_PPC_TLSGD: 8073 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 8074 { 8075 unsigned int insn2; 8076 bfd_vma offset = rel->r_offset; 8077 8078 if ((tls_mask & TLS_TPRELGD) != 0) 8079 { 8080 /* IE */ 8081 r_type = R_PPC_NONE; 8082 insn2 = 0x7c631214; /* add 3,3,2 */ 8083 } 8084 else 8085 { 8086 /* LE */ 8087 r_type = R_PPC_TPREL16_LO; 8088 rel->r_offset += d_offset; 8089 insn2 = 0x38630000; /* addi 3,3,0 */ 8090 } 8091 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8092 bfd_put_32 (output_bfd, insn2, contents + offset); 8093 /* Zap the reloc on the _tls_get_addr call too. */ 8094 BFD_ASSERT (offset == rel[1].r_offset); 8095 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8096 } 8097 break; 8098 8099 case R_PPC_TLSLD: 8100 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 8101 { 8102 unsigned int insn2; 8103 8104 for (r_symndx = 0; 8105 r_symndx < symtab_hdr->sh_info; 8106 r_symndx++) 8107 if (local_sections[r_symndx] == sec) 8108 break; 8109 if (r_symndx >= symtab_hdr->sh_info) 8110 r_symndx = STN_UNDEF; 8111 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 8112 if (r_symndx != STN_UNDEF) 8113 rel->r_addend -= (local_syms[r_symndx].st_value 8114 + sec->output_offset 8115 + sec->output_section->vma); 8116 8117 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 8118 rel->r_offset += d_offset; 8119 insn2 = 0x38630000; /* addi 3,3,0 */ 8120 bfd_put_32 (output_bfd, insn2, 8121 contents + rel->r_offset - d_offset); 8122 /* Zap the reloc on the _tls_get_addr call too. */ 8123 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset); 8124 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8125 goto again; 8126 } 8127 break; 8128 } 8129 8130 /* Handle other relocations that tweak non-addend part of insn. */ 8131 branch_bit = 0; 8132 switch (r_type) 8133 { 8134 default: 8135 break; 8136 8137 /* Branch taken prediction relocations. */ 8138 case R_PPC_ADDR14_BRTAKEN: 8139 case R_PPC_REL14_BRTAKEN: 8140 branch_bit = BRANCH_PREDICT_BIT; 8141 /* Fall thru */ 8142 8143 /* Branch not taken prediction relocations. */ 8144 case R_PPC_ADDR14_BRNTAKEN: 8145 case R_PPC_REL14_BRNTAKEN: 8146 { 8147 bfd_vma insn; 8148 8149 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 8150 insn &= ~BRANCH_PREDICT_BIT; 8151 insn |= branch_bit; 8152 8153 from = (rel->r_offset 8154 + input_section->output_offset 8155 + input_section->output_section->vma); 8156 8157 /* Invert 'y' bit if not the default. */ 8158 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) 8159 insn ^= BRANCH_PREDICT_BIT; 8160 8161 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 8162 break; 8163 } 8164 } 8165 8166 if (ELIMINATE_COPY_RELOCS 8167 && h != NULL 8168 && !h->def_regular 8169 && h->protected_def 8170 && ppc_elf_hash_entry (h)->has_addr16_ha 8171 && ppc_elf_hash_entry (h)->has_addr16_lo 8172 && htab->params->pic_fixup > 0) 8173 { 8174 /* Convert lis;addi or lis;load/store accessing a protected 8175 variable defined in a shared library to PIC. */ 8176 unsigned int insn; 8177 8178 if (r_type == R_PPC_ADDR16_HA) 8179 { 8180 insn = bfd_get_32 (output_bfd, 8181 contents + rel->r_offset - d_offset); 8182 if ((insn & (0x3f << 26)) == (15u << 26) 8183 && (insn & (0x1f << 16)) == 0 /* lis */) 8184 { 8185 bfd_byte *p; 8186 bfd_vma off; 8187 bfd_vma got_addr; 8188 8189 p = (contents + input_section->size 8190 - relax_info->workaround_size 8191 - relax_info->picfixup_size 8192 + picfixup_size); 8193 off = (p - contents) - (rel->r_offset - d_offset); 8194 if (off > 0x1fffffc || (off & 3) != 0) 8195 info->callbacks->einfo 8196 (_("%P: %H: fixup branch overflow\n"), 8197 input_bfd, input_section, rel->r_offset); 8198 8199 bfd_put_32 (output_bfd, B | off, 8200 contents + rel->r_offset - d_offset); 8201 got_addr = (htab->got->output_section->vma 8202 + htab->got->output_offset 8203 + (h->got.offset & ~1)); 8204 wrel->r_offset = (p - contents) + d_offset; 8205 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA); 8206 wrel->r_addend = got_addr; 8207 insn &= ~0xffff; 8208 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff; 8209 bfd_put_32 (output_bfd, insn, p); 8210 8211 /* Convert lis to lwz, loading address from GOT. */ 8212 insn &= ~0xffff; 8213 insn ^= (32u ^ 15u) << 26; 8214 insn |= (insn & (0x1f << 21)) >> 5; 8215 insn |= got_addr & 0xffff; 8216 bfd_put_32 (output_bfd, insn, p + 4); 8217 8218 bfd_put_32 (output_bfd, B | ((-4 - off) & 0x3ffffff), p + 8); 8219 picfixup_size += 12; 8220 8221 /* Use one of the spare relocs, so --emit-relocs 8222 output is reasonable. */ 8223 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel)); 8224 wrel++, rel++; 8225 rel->r_offset = wrel[-1].r_offset + 4; 8226 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO); 8227 rel->r_addend = wrel[-1].r_addend; 8228 8229 /* Continue on as if we had a got reloc, to output 8230 dynamic reloc. */ 8231 r_type = R_PPC_GOT16_LO; 8232 } 8233 else 8234 info->callbacks->einfo 8235 (_("%P: %H: error: %s with unexpected instruction %x\n"), 8236 input_bfd, input_section, rel->r_offset, 8237 "R_PPC_ADDR16_HA", insn); 8238 } 8239 else if (r_type == R_PPC_ADDR16_LO) 8240 { 8241 insn = bfd_get_32 (output_bfd, 8242 contents + rel->r_offset - d_offset); 8243 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 8244 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 8245 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 8246 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 8247 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 8248 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 8249 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 8250 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 8251 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 8252 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 8253 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 8254 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 8255 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 8256 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 8257 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 8258 && (insn & 3) != 1) 8259 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 8260 && ((insn & 3) == 0 || (insn & 3) == 3))) 8261 { 8262 /* Arrange to apply the reloc addend, if any. */ 8263 relocation = 0; 8264 unresolved_reloc = FALSE; 8265 rel->r_info = ELF32_R_INFO (0, r_type); 8266 } 8267 else 8268 info->callbacks->einfo 8269 (_("%P: %H: error: %s with unexpected instruction %x\n"), 8270 input_bfd, input_section, rel->r_offset, 8271 "R_PPC_ADDR16_LO", insn); 8272 } 8273 } 8274 8275 ifunc = NULL; 8276 if (!htab->is_vxworks) 8277 { 8278 struct plt_entry *ent; 8279 8280 if (h != NULL) 8281 { 8282 if (h->type == STT_GNU_IFUNC) 8283 ifunc = &h->plt.plist; 8284 } 8285 else if (local_got_offsets != NULL 8286 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 8287 { 8288 struct plt_entry **local_plt; 8289 8290 local_plt = (struct plt_entry **) (local_got_offsets 8291 + symtab_hdr->sh_info); 8292 ifunc = local_plt + r_symndx; 8293 } 8294 8295 ent = NULL; 8296 if (ifunc != NULL 8297 && (!bfd_link_pic (info) 8298 || is_branch_reloc (r_type))) 8299 { 8300 addend = 0; 8301 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 8302 addend = rel->r_addend; 8303 ent = find_plt_ent (ifunc, got2, addend); 8304 } 8305 if (ent != NULL) 8306 { 8307 if (h == NULL && (ent->plt.offset & 1) == 0) 8308 { 8309 Elf_Internal_Rela rela; 8310 bfd_byte *loc; 8311 8312 rela.r_offset = (htab->iplt->output_section->vma 8313 + htab->iplt->output_offset 8314 + ent->plt.offset); 8315 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8316 rela.r_addend = relocation; 8317 loc = htab->reliplt->contents; 8318 loc += (htab->reliplt->reloc_count++ 8319 * sizeof (Elf32_External_Rela)); 8320 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 8321 8322 ent->plt.offset |= 1; 8323 } 8324 if (h == NULL && (ent->glink_offset & 1) == 0) 8325 { 8326 unsigned char *p = ((unsigned char *) htab->glink->contents 8327 + ent->glink_offset); 8328 write_glink_stub (ent, htab->iplt, p, info); 8329 ent->glink_offset |= 1; 8330 } 8331 8332 unresolved_reloc = FALSE; 8333 if (htab->plt_type == PLT_NEW 8334 || !htab->elf.dynamic_sections_created 8335 || h == NULL 8336 || h->dynindx == -1) 8337 relocation = (htab->glink->output_section->vma 8338 + htab->glink->output_offset 8339 + (ent->glink_offset & ~1)); 8340 else 8341 relocation = (htab->plt->output_section->vma 8342 + htab->plt->output_offset 8343 + ent->plt.offset); 8344 } 8345 } 8346 8347 addend = rel->r_addend; 8348 tls_type = 0; 8349 howto = NULL; 8350 if (r_type < R_PPC_max) 8351 howto = ppc_elf_howto_table[r_type]; 8352 switch ((int)r_type) 8353 { 8354 default: 8355 info->callbacks->einfo 8356 (_("%P: %B: unknown relocation type %d for symbol %s\n"), 8357 input_bfd, (int) r_type, sym_name); 8358 8359 bfd_set_error (bfd_error_bad_value); 8360 ret = FALSE; 8361 goto copy_reloc; 8362 8363 case R_PPC_NONE: 8364 case R_PPC_TLS: 8365 case R_PPC_TLSGD: 8366 case R_PPC_TLSLD: 8367 case R_PPC_EMB_MRKREF: 8368 case R_PPC_GNU_VTINHERIT: 8369 case R_PPC_GNU_VTENTRY: 8370 goto copy_reloc; 8371 8372 /* GOT16 relocations. Like an ADDR16 using the symbol's 8373 address in the GOT as relocation value instead of the 8374 symbol's value itself. Also, create a GOT entry for the 8375 symbol and put the symbol value there. */ 8376 case R_PPC_GOT_TLSGD16: 8377 case R_PPC_GOT_TLSGD16_LO: 8378 case R_PPC_GOT_TLSGD16_HI: 8379 case R_PPC_GOT_TLSGD16_HA: 8380 tls_type = TLS_TLS | TLS_GD; 8381 goto dogot; 8382 8383 case R_PPC_GOT_TLSLD16: 8384 case R_PPC_GOT_TLSLD16_LO: 8385 case R_PPC_GOT_TLSLD16_HI: 8386 case R_PPC_GOT_TLSLD16_HA: 8387 tls_type = TLS_TLS | TLS_LD; 8388 goto dogot; 8389 8390 case R_PPC_GOT_TPREL16: 8391 case R_PPC_GOT_TPREL16_LO: 8392 case R_PPC_GOT_TPREL16_HI: 8393 case R_PPC_GOT_TPREL16_HA: 8394 tls_type = TLS_TLS | TLS_TPREL; 8395 goto dogot; 8396 8397 case R_PPC_GOT_DTPREL16: 8398 case R_PPC_GOT_DTPREL16_LO: 8399 case R_PPC_GOT_DTPREL16_HI: 8400 case R_PPC_GOT_DTPREL16_HA: 8401 tls_type = TLS_TLS | TLS_DTPREL; 8402 goto dogot; 8403 8404 case R_PPC_GOT16: 8405 case R_PPC_GOT16_LO: 8406 case R_PPC_GOT16_HI: 8407 case R_PPC_GOT16_HA: 8408 tls_mask = 0; 8409 dogot: 8410 { 8411 /* Relocation is to the entry for this symbol in the global 8412 offset table. */ 8413 bfd_vma off; 8414 bfd_vma *offp; 8415 unsigned long indx; 8416 8417 if (htab->got == NULL) 8418 abort (); 8419 8420 indx = 0; 8421 if (tls_type == (TLS_TLS | TLS_LD) 8422 && (h == NULL 8423 || !h->def_dynamic)) 8424 offp = &htab->tlsld_got.offset; 8425 else if (h != NULL) 8426 { 8427 bfd_boolean dyn; 8428 dyn = htab->elf.dynamic_sections_created; 8429 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) 8430 || (bfd_link_pic (info) 8431 && SYMBOL_REFERENCES_LOCAL (info, h))) 8432 /* This is actually a static link, or it is a 8433 -Bsymbolic link and the symbol is defined 8434 locally, or the symbol was forced to be local 8435 because of a version file. */ 8436 ; 8437 else 8438 { 8439 BFD_ASSERT (h->dynindx != -1); 8440 indx = h->dynindx; 8441 unresolved_reloc = FALSE; 8442 } 8443 offp = &h->got.offset; 8444 } 8445 else 8446 { 8447 if (local_got_offsets == NULL) 8448 abort (); 8449 offp = &local_got_offsets[r_symndx]; 8450 } 8451 8452 /* The offset must always be a multiple of 4. We use the 8453 least significant bit to record whether we have already 8454 processed this entry. */ 8455 off = *offp; 8456 if ((off & 1) != 0) 8457 off &= ~1; 8458 else 8459 { 8460 unsigned int tls_m = (tls_mask 8461 & (TLS_LD | TLS_GD | TLS_DTPREL 8462 | TLS_TPREL | TLS_TPRELGD)); 8463 8464 if (offp == &htab->tlsld_got.offset) 8465 tls_m = TLS_LD; 8466 else if (h == NULL 8467 || !h->def_dynamic) 8468 tls_m &= ~TLS_LD; 8469 8470 /* We might have multiple got entries for this sym. 8471 Initialize them all. */ 8472 do 8473 { 8474 int tls_ty = 0; 8475 8476 if ((tls_m & TLS_LD) != 0) 8477 { 8478 tls_ty = TLS_TLS | TLS_LD; 8479 tls_m &= ~TLS_LD; 8480 } 8481 else if ((tls_m & TLS_GD) != 0) 8482 { 8483 tls_ty = TLS_TLS | TLS_GD; 8484 tls_m &= ~TLS_GD; 8485 } 8486 else if ((tls_m & TLS_DTPREL) != 0) 8487 { 8488 tls_ty = TLS_TLS | TLS_DTPREL; 8489 tls_m &= ~TLS_DTPREL; 8490 } 8491 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) 8492 { 8493 tls_ty = TLS_TLS | TLS_TPREL; 8494 tls_m = 0; 8495 } 8496 8497 /* Generate relocs for the dynamic linker. */ 8498 if ((bfd_link_pic (info) || indx != 0) 8499 && (offp == &htab->tlsld_got.offset 8500 || h == NULL 8501 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 8502 || h->root.type != bfd_link_hash_undefweak)) 8503 { 8504 asection *rsec = htab->relgot; 8505 bfd_byte * loc; 8506 8507 if (ifunc != NULL) 8508 rsec = htab->reliplt; 8509 outrel.r_offset = (htab->got->output_section->vma 8510 + htab->got->output_offset 8511 + off); 8512 outrel.r_addend = 0; 8513 if (tls_ty & (TLS_LD | TLS_GD)) 8514 { 8515 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); 8516 if (tls_ty == (TLS_TLS | TLS_GD)) 8517 { 8518 loc = rsec->contents; 8519 loc += (rsec->reloc_count++ 8520 * sizeof (Elf32_External_Rela)); 8521 bfd_elf32_swap_reloca_out (output_bfd, 8522 &outrel, loc); 8523 outrel.r_offset += 4; 8524 outrel.r_info 8525 = ELF32_R_INFO (indx, R_PPC_DTPREL32); 8526 } 8527 } 8528 else if (tls_ty == (TLS_TLS | TLS_DTPREL)) 8529 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); 8530 else if (tls_ty == (TLS_TLS | TLS_TPREL)) 8531 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); 8532 else if (indx != 0) 8533 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); 8534 else if (ifunc != NULL) 8535 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8536 else 8537 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8538 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD)) 8539 { 8540 outrel.r_addend += relocation; 8541 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 8542 { 8543 if (htab->elf.tls_sec == NULL) 8544 outrel.r_addend = 0; 8545 else 8546 outrel.r_addend -= htab->elf.tls_sec->vma; 8547 } 8548 } 8549 loc = rsec->contents; 8550 loc += (rsec->reloc_count++ 8551 * sizeof (Elf32_External_Rela)); 8552 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 8553 } 8554 8555 /* Init the .got section contents if we're not 8556 emitting a reloc. */ 8557 else 8558 { 8559 bfd_vma value = relocation; 8560 8561 if (tls_ty == (TLS_TLS | TLS_LD)) 8562 value = 1; 8563 else if (tls_ty != 0) 8564 { 8565 if (htab->elf.tls_sec == NULL) 8566 value = 0; 8567 else 8568 { 8569 value -= htab->elf.tls_sec->vma + DTP_OFFSET; 8570 if (tls_ty == (TLS_TLS | TLS_TPREL)) 8571 value += DTP_OFFSET - TP_OFFSET; 8572 } 8573 8574 if (tls_ty == (TLS_TLS | TLS_GD)) 8575 { 8576 bfd_put_32 (output_bfd, value, 8577 htab->got->contents + off + 4); 8578 value = 1; 8579 } 8580 } 8581 bfd_put_32 (output_bfd, value, 8582 htab->got->contents + off); 8583 } 8584 8585 off += 4; 8586 if (tls_ty & (TLS_LD | TLS_GD)) 8587 off += 4; 8588 } 8589 while (tls_m != 0); 8590 8591 off = *offp; 8592 *offp = off | 1; 8593 } 8594 8595 if (off >= (bfd_vma) -2) 8596 abort (); 8597 8598 if ((tls_type & TLS_TLS) != 0) 8599 { 8600 if (tls_type != (TLS_TLS | TLS_LD)) 8601 { 8602 if ((tls_mask & TLS_LD) != 0 8603 && !(h == NULL 8604 || !h->def_dynamic)) 8605 off += 8; 8606 if (tls_type != (TLS_TLS | TLS_GD)) 8607 { 8608 if ((tls_mask & TLS_GD) != 0) 8609 off += 8; 8610 if (tls_type != (TLS_TLS | TLS_DTPREL)) 8611 { 8612 if ((tls_mask & TLS_DTPREL) != 0) 8613 off += 4; 8614 } 8615 } 8616 } 8617 } 8618 8619 /* If here for a picfixup, we're done. */ 8620 if (r_type != ELF32_R_TYPE (rel->r_info)) 8621 goto copy_reloc; 8622 8623 relocation = (htab->got->output_section->vma 8624 + htab->got->output_offset 8625 + off 8626 - SYM_VAL (htab->elf.hgot)); 8627 8628 /* Addends on got relocations don't make much sense. 8629 x+off@got is actually x@got+off, and since the got is 8630 generated by a hash table traversal, the value in the 8631 got at entry m+n bears little relation to the entry m. */ 8632 if (addend != 0) 8633 info->callbacks->einfo 8634 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"), 8635 input_bfd, input_section, rel->r_offset, 8636 howto->name, 8637 sym_name); 8638 } 8639 break; 8640 8641 /* Relocations that need no special processing. */ 8642 case R_PPC_LOCAL24PC: 8643 /* It makes no sense to point a local relocation 8644 at a symbol not in this object. */ 8645 if (unresolved_reloc) 8646 { 8647 (*info->callbacks->undefined_symbol) (info, 8648 h->root.root.string, 8649 input_bfd, 8650 input_section, 8651 rel->r_offset, 8652 TRUE); 8653 goto copy_reloc; 8654 } 8655 break; 8656 8657 case R_PPC_DTPREL16: 8658 case R_PPC_DTPREL16_LO: 8659 case R_PPC_DTPREL16_HI: 8660 case R_PPC_DTPREL16_HA: 8661 if (htab->elf.tls_sec != NULL) 8662 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8663 break; 8664 8665 /* Relocations that may need to be propagated if this is a shared 8666 object. */ 8667 case R_PPC_TPREL16: 8668 case R_PPC_TPREL16_LO: 8669 case R_PPC_TPREL16_HI: 8670 case R_PPC_TPREL16_HA: 8671 if (h != NULL 8672 && h->root.type == bfd_link_hash_undefweak 8673 && h->dynindx == -1) 8674 { 8675 /* Make this relocation against an undefined weak symbol 8676 resolve to zero. This is really just a tweak, since 8677 code using weak externs ought to check that they are 8678 defined before using them. */ 8679 bfd_byte *p = contents + rel->r_offset - d_offset; 8680 unsigned int insn = bfd_get_32 (output_bfd, p); 8681 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2); 8682 if (insn != 0) 8683 bfd_put_32 (output_bfd, insn, p); 8684 break; 8685 } 8686 if (htab->elf.tls_sec != NULL) 8687 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8688 /* The TPREL16 relocs shouldn't really be used in shared 8689 libs as they will result in DT_TEXTREL being set, but 8690 support them anyway. */ 8691 goto dodyn; 8692 8693 case R_PPC_TPREL32: 8694 if (htab->elf.tls_sec != NULL) 8695 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8696 goto dodyn; 8697 8698 case R_PPC_DTPREL32: 8699 if (htab->elf.tls_sec != NULL) 8700 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8701 goto dodyn; 8702 8703 case R_PPC_DTPMOD32: 8704 relocation = 1; 8705 addend = 0; 8706 goto dodyn; 8707 8708 case R_PPC_REL16: 8709 case R_PPC_REL16_LO: 8710 case R_PPC_REL16_HI: 8711 case R_PPC_REL16_HA: 8712 case R_PPC_REL16DX_HA: 8713 break; 8714 8715 case R_PPC_REL32: 8716 if (h == NULL || h == htab->elf.hgot) 8717 break; 8718 /* fall through */ 8719 8720 case R_PPC_ADDR32: 8721 case R_PPC_ADDR16: 8722 case R_PPC_ADDR16_LO: 8723 case R_PPC_ADDR16_HI: 8724 case R_PPC_ADDR16_HA: 8725 case R_PPC_UADDR32: 8726 case R_PPC_UADDR16: 8727 goto dodyn; 8728 8729 case R_PPC_VLE_REL8: 8730 case R_PPC_VLE_REL15: 8731 case R_PPC_VLE_REL24: 8732 case R_PPC_REL24: 8733 case R_PPC_REL14: 8734 case R_PPC_REL14_BRTAKEN: 8735 case R_PPC_REL14_BRNTAKEN: 8736 /* If these relocations are not to a named symbol, they can be 8737 handled right here, no need to bother the dynamic linker. */ 8738 if (SYMBOL_CALLS_LOCAL (info, h) 8739 || h == htab->elf.hgot) 8740 break; 8741 /* fall through */ 8742 8743 case R_PPC_ADDR24: 8744 case R_PPC_ADDR14: 8745 case R_PPC_ADDR14_BRTAKEN: 8746 case R_PPC_ADDR14_BRNTAKEN: 8747 if (h != NULL && !bfd_link_pic (info)) 8748 break; 8749 /* fall through */ 8750 8751 dodyn: 8752 if ((input_section->flags & SEC_ALLOC) == 0 8753 || is_vxworks_tls) 8754 break; 8755 8756 if ((bfd_link_pic (info) 8757 && !(h != NULL 8758 && ((h->root.type == bfd_link_hash_undefined 8759 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 8760 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 8761 || (h->root.type == bfd_link_hash_undefweak 8762 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))) 8763 && (must_be_dyn_reloc (info, r_type) 8764 || !SYMBOL_CALLS_LOCAL (info, h))) 8765 || (ELIMINATE_COPY_RELOCS 8766 && !bfd_link_pic (info) 8767 && h != NULL 8768 && h->dynindx != -1 8769 && !h->non_got_ref 8770 && !h->def_regular 8771 && !(h->protected_def 8772 && ppc_elf_hash_entry (h)->has_addr16_ha 8773 && ppc_elf_hash_entry (h)->has_addr16_lo 8774 && htab->params->pic_fixup > 0))) 8775 { 8776 int skip; 8777 bfd_byte *loc; 8778 asection *sreloc; 8779#ifdef DEBUG 8780 fprintf (stderr, "ppc_elf_relocate_section needs to " 8781 "create relocation for %s\n", 8782 (h && h->root.root.string 8783 ? h->root.root.string : "<unknown>")); 8784#endif 8785 8786 /* When generating a shared object, these relocations 8787 are copied into the output file to be resolved at run 8788 time. */ 8789 sreloc = elf_section_data (input_section)->sreloc; 8790 if (ifunc) 8791 sreloc = htab->reliplt; 8792 if (sreloc == NULL) 8793 return FALSE; 8794 8795 skip = 0; 8796 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, 8797 input_section, 8798 rel->r_offset); 8799 if (outrel.r_offset == (bfd_vma) -1 8800 || outrel.r_offset == (bfd_vma) -2) 8801 skip = (int) outrel.r_offset; 8802 outrel.r_offset += (input_section->output_section->vma 8803 + input_section->output_offset); 8804 8805 if (skip) 8806 memset (&outrel, 0, sizeof outrel); 8807 else if ((h != NULL 8808 && (h->root.type == bfd_link_hash_undefined 8809 || h->root.type == bfd_link_hash_undefweak)) 8810 || !SYMBOL_REFERENCES_LOCAL (info, h)) 8811 { 8812 BFD_ASSERT (h->dynindx != -1); 8813 unresolved_reloc = FALSE; 8814 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 8815 outrel.r_addend = rel->r_addend; 8816 } 8817 else 8818 { 8819 outrel.r_addend = relocation + rel->r_addend; 8820 8821 if (r_type != R_PPC_ADDR32) 8822 { 8823 long indx = 0; 8824 8825 if (ifunc != NULL) 8826 { 8827 /* If we get here when building a static 8828 executable, then the libc startup function 8829 responsible for applying indirect function 8830 relocations is going to complain about 8831 the reloc type. 8832 If we get here when building a dynamic 8833 executable, it will be because we have 8834 a text relocation. The dynamic loader 8835 will set the text segment writable and 8836 non-executable to apply text relocations. 8837 So we'll segfault when trying to run the 8838 indirection function to resolve the reloc. */ 8839 info->callbacks->einfo 8840 (_("%P: %H: relocation %s for indirect " 8841 "function %s unsupported\n"), 8842 input_bfd, input_section, rel->r_offset, 8843 howto->name, 8844 sym_name); 8845 ret = FALSE; 8846 } 8847 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) 8848 ; 8849 else if (sec == NULL || sec->owner == NULL) 8850 { 8851 bfd_set_error (bfd_error_bad_value); 8852 ret = FALSE; 8853 } 8854 else 8855 { 8856 asection *osec; 8857 8858 /* We are turning this relocation into one 8859 against a section symbol. It would be 8860 proper to subtract the symbol's value, 8861 osec->vma, from the emitted reloc addend, 8862 but ld.so expects buggy relocs. 8863 FIXME: Why not always use a zero index? */ 8864 osec = sec->output_section; 8865 indx = elf_section_data (osec)->dynindx; 8866 if (indx == 0) 8867 { 8868 osec = htab->elf.text_index_section; 8869 indx = elf_section_data (osec)->dynindx; 8870 } 8871 BFD_ASSERT (indx != 0); 8872#ifdef DEBUG 8873 if (indx == 0) 8874 printf ("indx=%ld section=%s flags=%08x name=%s\n", 8875 indx, osec->name, osec->flags, 8876 h->root.root.string); 8877#endif 8878 } 8879 8880 outrel.r_info = ELF32_R_INFO (indx, r_type); 8881 } 8882 else if (ifunc != NULL) 8883 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8884 else 8885 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8886 } 8887 8888 loc = sreloc->contents; 8889 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 8890 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 8891 8892 if (skip == -1) 8893 goto copy_reloc; 8894 8895 /* This reloc will be computed at runtime. We clear the memory 8896 so that it contains predictable value. */ 8897 if (! skip 8898 && ((input_section->flags & SEC_ALLOC) != 0 8899 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) 8900 { 8901 relocation = howto->pc_relative ? outrel.r_offset : 0; 8902 addend = 0; 8903 break; 8904 } 8905 } 8906 break; 8907 8908 case R_PPC_RELAX_PLT: 8909 case R_PPC_RELAX_PLTREL24: 8910 if (h != NULL) 8911 { 8912 struct plt_entry *ent; 8913 bfd_vma got2_addend = 0; 8914 8915 if (r_type == R_PPC_RELAX_PLTREL24) 8916 { 8917 if (bfd_link_pic (info)) 8918 got2_addend = addend; 8919 addend = 0; 8920 } 8921 ent = find_plt_ent (&h->plt.plist, got2, got2_addend); 8922 if (htab->plt_type == PLT_NEW) 8923 relocation = (htab->glink->output_section->vma 8924 + htab->glink->output_offset 8925 + ent->glink_offset); 8926 else 8927 relocation = (htab->plt->output_section->vma 8928 + htab->plt->output_offset 8929 + ent->plt.offset); 8930 } 8931 /* Fall thru */ 8932 8933 case R_PPC_RELAX: 8934 { 8935 const int *stub; 8936 size_t size; 8937 size_t insn_offset = rel->r_offset; 8938 unsigned int insn; 8939 8940 if (bfd_link_pic (info)) 8941 { 8942 relocation -= (input_section->output_section->vma 8943 + input_section->output_offset 8944 + rel->r_offset - 4); 8945 stub = shared_stub_entry; 8946 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12); 8947 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8); 8948 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4); 8949 stub += 3; 8950 size = ARRAY_SIZE (shared_stub_entry) - 3; 8951 } 8952 else 8953 { 8954 stub = stub_entry; 8955 size = ARRAY_SIZE (stub_entry); 8956 } 8957 8958 relocation += addend; 8959 if (bfd_link_relocatable (info)) 8960 relocation = 0; 8961 8962 /* First insn is HA, second is LO. */ 8963 insn = *stub++; 8964 insn |= ((relocation + 0x8000) >> 16) & 0xffff; 8965 bfd_put_32 (output_bfd, insn, contents + insn_offset); 8966 insn_offset += 4; 8967 8968 insn = *stub++; 8969 insn |= relocation & 0xffff; 8970 bfd_put_32 (output_bfd, insn, contents + insn_offset); 8971 insn_offset += 4; 8972 size -= 2; 8973 8974 while (size != 0) 8975 { 8976 insn = *stub++; 8977 --size; 8978 bfd_put_32 (output_bfd, insn, contents + insn_offset); 8979 insn_offset += 4; 8980 } 8981 8982 /* Rewrite the reloc and convert one of the trailing nop 8983 relocs to describe this relocation. */ 8984 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE); 8985 /* The relocs are at the bottom 2 bytes */ 8986 wrel->r_offset = rel->r_offset + d_offset; 8987 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); 8988 wrel->r_addend = rel->r_addend; 8989 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel)); 8990 wrel++, rel++; 8991 wrel->r_offset += 4; 8992 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); 8993 } 8994 continue; 8995 8996 /* Indirect .sdata relocation. */ 8997 case R_PPC_EMB_SDAI16: 8998 BFD_ASSERT (htab->sdata[0].section != NULL); 8999 if (!is_static_defined (htab->sdata[0].sym)) 9000 { 9001 unresolved_reloc = TRUE; 9002 break; 9003 } 9004 relocation 9005 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], 9006 h, relocation, rel); 9007 addend = 0; 9008 break; 9009 9010 /* Indirect .sdata2 relocation. */ 9011 case R_PPC_EMB_SDA2I16: 9012 BFD_ASSERT (htab->sdata[1].section != NULL); 9013 if (!is_static_defined (htab->sdata[1].sym)) 9014 { 9015 unresolved_reloc = TRUE; 9016 break; 9017 } 9018 relocation 9019 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], 9020 h, relocation, rel); 9021 addend = 0; 9022 break; 9023 9024 /* Handle the TOC16 reloc. We want to use the offset within the .got 9025 section, not the actual VMA. This is appropriate when generating 9026 an embedded ELF object, for which the .got section acts like the 9027 AIX .toc section. */ 9028 case R_PPC_TOC16: /* phony GOT16 relocations */ 9029 if (sec == NULL || sec->output_section == NULL) 9030 { 9031 unresolved_reloc = TRUE; 9032 break; 9033 } 9034 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec), 9035 ".got") == 0 9036 || strcmp (bfd_get_section_name (sec->owner, sec), 9037 ".cgot") == 0); 9038 9039 addend -= sec->output_section->vma + sec->output_offset + 0x8000; 9040 break; 9041 9042 case R_PPC_PLTREL24: 9043 if (h != NULL && ifunc == NULL) 9044 { 9045 struct plt_entry *ent; 9046 9047 ent = find_plt_ent (&h->plt.plist, got2, 9048 bfd_link_pic (info) ? addend : 0); 9049 if (ent == NULL 9050 || htab->plt == NULL) 9051 { 9052 /* We didn't make a PLT entry for this symbol. This 9053 happens when statically linking PIC code, or when 9054 using -Bsymbolic. */ 9055 } 9056 else 9057 { 9058 /* Relocation is to the entry for this symbol in the 9059 procedure linkage table. */ 9060 unresolved_reloc = FALSE; 9061 if (htab->plt_type == PLT_NEW) 9062 relocation = (htab->glink->output_section->vma 9063 + htab->glink->output_offset 9064 + ent->glink_offset); 9065 else 9066 relocation = (htab->plt->output_section->vma 9067 + htab->plt->output_offset 9068 + ent->plt.offset); 9069 } 9070 } 9071 9072 /* R_PPC_PLTREL24 is rather special. If non-zero, the 9073 addend specifies the GOT pointer offset within .got2. 9074 Don't apply it to the relocation field. */ 9075 addend = 0; 9076 break; 9077 9078 /* Relocate against _SDA_BASE_. */ 9079 case R_PPC_SDAREL16: 9080 { 9081 const char *name; 9082 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 9083 9084 if (sec == NULL 9085 || sec->output_section == NULL 9086 || !is_static_defined (sda)) 9087 { 9088 unresolved_reloc = TRUE; 9089 break; 9090 } 9091 addend -= SYM_VAL (sda); 9092 9093 name = bfd_get_section_name (output_bfd, sec->output_section); 9094 if (!(strcmp (name, ".sdata") == 0 9095 || strcmp (name, ".sbss") == 0)) 9096 { 9097 info->callbacks->einfo 9098 (_("%P: %B: the target (%s) of a %s relocation is " 9099 "in the wrong output section (%s)\n"), 9100 input_bfd, 9101 sym_name, 9102 howto->name, 9103 name); 9104 } 9105 } 9106 break; 9107 9108 /* Relocate against _SDA2_BASE_. */ 9109 case R_PPC_EMB_SDA2REL: 9110 { 9111 const char *name; 9112 struct elf_link_hash_entry *sda = htab->sdata[1].sym; 9113 9114 if (sec == NULL 9115 || sec->output_section == NULL 9116 || !is_static_defined (sda)) 9117 { 9118 unresolved_reloc = TRUE; 9119 break; 9120 } 9121 addend -= SYM_VAL (sda); 9122 9123 name = bfd_get_section_name (output_bfd, sec->output_section); 9124 if (!(strcmp (name, ".sdata2") == 0 9125 || strcmp (name, ".sbss2") == 0)) 9126 { 9127 info->callbacks->einfo 9128 (_("%P: %B: the target (%s) of a %s relocation is " 9129 "in the wrong output section (%s)\n"), 9130 input_bfd, 9131 sym_name, 9132 howto->name, 9133 name); 9134 } 9135 } 9136 break; 9137 9138 case R_PPC_VLE_LO16A: 9139 relocation = relocation + addend; 9140 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9141 relocation, split16a_type); 9142 goto copy_reloc; 9143 9144 case R_PPC_VLE_LO16D: 9145 relocation = relocation + addend; 9146 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9147 relocation, split16d_type); 9148 goto copy_reloc; 9149 9150 case R_PPC_VLE_HI16A: 9151 relocation = (relocation + addend) >> 16; 9152 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9153 relocation, split16a_type); 9154 goto copy_reloc; 9155 9156 case R_PPC_VLE_HI16D: 9157 relocation = (relocation + addend) >> 16; 9158 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9159 relocation, split16d_type); 9160 goto copy_reloc; 9161 9162 case R_PPC_VLE_HA16A: 9163 relocation = (relocation + addend + 0x8000) >> 16; 9164 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9165 relocation, split16a_type); 9166 goto copy_reloc; 9167 9168 case R_PPC_VLE_HA16D: 9169 relocation = (relocation + addend + 0x8000) >> 16; 9170 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9171 relocation, split16d_type); 9172 goto copy_reloc; 9173 9174 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ 9175 case R_PPC_EMB_SDA21: 9176 case R_PPC_VLE_SDA21: 9177 case R_PPC_EMB_RELSDA: 9178 case R_PPC_VLE_SDA21_LO: 9179 { 9180 const char *name; 9181 int reg; 9182 unsigned int insn; 9183 struct elf_link_hash_entry *sda = NULL; 9184 9185 if (sec == NULL || sec->output_section == NULL) 9186 { 9187 unresolved_reloc = TRUE; 9188 break; 9189 } 9190 9191 name = bfd_get_section_name (output_bfd, sec->output_section); 9192 if (strcmp (name, ".sdata") == 0 9193 || strcmp (name, ".sbss") == 0) 9194 { 9195 reg = 13; 9196 sda = htab->sdata[0].sym; 9197 } 9198 else if (strcmp (name, ".sdata2") == 0 9199 || strcmp (name, ".sbss2") == 0) 9200 { 9201 reg = 2; 9202 sda = htab->sdata[1].sym; 9203 } 9204 else if (strcmp (name, ".PPC.EMB.sdata0") == 0 9205 || strcmp (name, ".PPC.EMB.sbss0") == 0) 9206 { 9207 reg = 0; 9208 } 9209 else 9210 { 9211 info->callbacks->einfo 9212 (_("%P: %B: the target (%s) of a %s relocation is " 9213 "in the wrong output section (%s)\n"), 9214 input_bfd, 9215 sym_name, 9216 howto->name, 9217 name); 9218 9219 bfd_set_error (bfd_error_bad_value); 9220 ret = FALSE; 9221 goto copy_reloc; 9222 } 9223 9224 if (sda != NULL) 9225 { 9226 if (!is_static_defined (sda)) 9227 { 9228 unresolved_reloc = TRUE; 9229 break; 9230 } 9231 addend -= SYM_VAL (sda); 9232 } 9233 9234 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 9235 if (reg == 0 9236 && (r_type == R_PPC_VLE_SDA21 9237 || r_type == R_PPC_VLE_SDA21_LO)) 9238 { 9239 relocation = relocation + addend; 9240 addend = 0; 9241 9242 /* Force e_li insn, keeping RT from original insn. */ 9243 insn &= 0x1f << 21; 9244 insn |= 28u << 26; 9245 9246 /* We have an li20 field, bits 17..20, 11..15, 21..31. */ 9247 /* Top 4 bits of value to 17..20. */ 9248 insn |= (relocation & 0xf0000) >> 5; 9249 /* Next 5 bits of the value to 11..15. */ 9250 insn |= (relocation & 0xf800) << 5; 9251 /* And the final 11 bits of the value to bits 21 to 31. */ 9252 insn |= relocation & 0x7ff; 9253 9254 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 9255 9256 if (r_type == R_PPC_VLE_SDA21 9257 && ((relocation + 0x80000) & 0xffffffff) > 0x100000) 9258 goto overflow; 9259 goto copy_reloc; 9260 } 9261 else if (r_type == R_PPC_EMB_SDA21 9262 || r_type == R_PPC_VLE_SDA21 9263 || r_type == R_PPC_VLE_SDA21_LO) 9264 { 9265 /* Fill in register field. */ 9266 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); 9267 } 9268 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 9269 } 9270 break; 9271 9272 case R_PPC_VLE_SDAREL_LO16A: 9273 case R_PPC_VLE_SDAREL_LO16D: 9274 case R_PPC_VLE_SDAREL_HI16A: 9275 case R_PPC_VLE_SDAREL_HI16D: 9276 case R_PPC_VLE_SDAREL_HA16A: 9277 case R_PPC_VLE_SDAREL_HA16D: 9278 { 9279 bfd_vma value; 9280 const char *name; 9281 //int reg; 9282 struct elf_link_hash_entry *sda = NULL; 9283 9284 if (sec == NULL || sec->output_section == NULL) 9285 { 9286 unresolved_reloc = TRUE; 9287 break; 9288 } 9289 9290 name = bfd_get_section_name (output_bfd, sec->output_section); 9291 if (strcmp (name, ".sdata") == 0 9292 || strcmp (name, ".sbss") == 0) 9293 { 9294 //reg = 13; 9295 sda = htab->sdata[0].sym; 9296 } 9297 else if (strcmp (name, ".sdata2") == 0 9298 || strcmp (name, ".sbss2") == 0) 9299 { 9300 //reg = 2; 9301 sda = htab->sdata[1].sym; 9302 } 9303 else 9304 { 9305 (*_bfd_error_handler) 9306 (_("%B: the target (%s) of a %s relocation is " 9307 "in the wrong output section (%s)"), 9308 input_bfd, 9309 sym_name, 9310 howto->name, 9311 name); 9312 9313 bfd_set_error (bfd_error_bad_value); 9314 ret = FALSE; 9315 goto copy_reloc; 9316 } 9317 9318 if (sda != NULL) 9319 { 9320 if (!is_static_defined (sda)) 9321 { 9322 unresolved_reloc = TRUE; 9323 break; 9324 } 9325 } 9326 9327 value = (sda->root.u.def.section->output_section->vma 9328 + sda->root.u.def.section->output_offset 9329 + addend); 9330 9331 if (r_type == R_PPC_VLE_SDAREL_LO16A) 9332 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9333 value, split16a_type); 9334 else if (r_type == R_PPC_VLE_SDAREL_LO16D) 9335 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9336 value, split16d_type); 9337 else if (r_type == R_PPC_VLE_SDAREL_HI16A) 9338 { 9339 value = value >> 16; 9340 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9341 value, split16a_type); 9342 } 9343 else if (r_type == R_PPC_VLE_SDAREL_HI16D) 9344 { 9345 value = value >> 16; 9346 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9347 value, split16d_type); 9348 } 9349 else if (r_type == R_PPC_VLE_SDAREL_HA16A) 9350 { 9351 value = (value + 0x8000) >> 16; 9352 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9353 value, split16a_type); 9354 } 9355 else if (r_type == R_PPC_VLE_SDAREL_HA16D) 9356 { 9357 value = (value + 0x8000) >> 16; 9358 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9359 value, split16d_type); 9360 } 9361 } 9362 goto copy_reloc; 9363 9364 /* Relocate against the beginning of the section. */ 9365 case R_PPC_SECTOFF: 9366 case R_PPC_SECTOFF_LO: 9367 case R_PPC_SECTOFF_HI: 9368 case R_PPC_SECTOFF_HA: 9369 if (sec == NULL || sec->output_section == NULL) 9370 { 9371 unresolved_reloc = TRUE; 9372 break; 9373 } 9374 addend -= sec->output_section->vma; 9375 break; 9376 9377 /* Negative relocations. */ 9378 case R_PPC_EMB_NADDR32: 9379 case R_PPC_EMB_NADDR16: 9380 case R_PPC_EMB_NADDR16_LO: 9381 case R_PPC_EMB_NADDR16_HI: 9382 case R_PPC_EMB_NADDR16_HA: 9383 addend -= 2 * relocation; 9384 break; 9385 9386 case R_PPC_COPY: 9387 case R_PPC_GLOB_DAT: 9388 case R_PPC_JMP_SLOT: 9389 case R_PPC_RELATIVE: 9390 case R_PPC_IRELATIVE: 9391 case R_PPC_PLT32: 9392 case R_PPC_PLTREL32: 9393 case R_PPC_PLT16_LO: 9394 case R_PPC_PLT16_HI: 9395 case R_PPC_PLT16_HA: 9396 case R_PPC_ADDR30: 9397 case R_PPC_EMB_RELSEC16: 9398 case R_PPC_EMB_RELST_LO: 9399 case R_PPC_EMB_RELST_HI: 9400 case R_PPC_EMB_RELST_HA: 9401 case R_PPC_EMB_BIT_FLD: 9402 info->callbacks->einfo 9403 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"), 9404 input_bfd, 9405 howto->name, 9406 sym_name); 9407 9408 bfd_set_error (bfd_error_invalid_operation); 9409 ret = FALSE; 9410 goto copy_reloc; 9411 } 9412 9413 /* Do any further special processing. */ 9414 switch (r_type) 9415 { 9416 default: 9417 break; 9418 9419 case R_PPC_ADDR16_HA: 9420 case R_PPC_REL16_HA: 9421 case R_PPC_REL16DX_HA: 9422 case R_PPC_SECTOFF_HA: 9423 case R_PPC_TPREL16_HA: 9424 case R_PPC_DTPREL16_HA: 9425 case R_PPC_EMB_NADDR16_HA: 9426 case R_PPC_EMB_RELST_HA: 9427 /* It's just possible that this symbol is a weak symbol 9428 that's not actually defined anywhere. In that case, 9429 'sec' would be NULL, and we should leave the symbol 9430 alone (it will be set to zero elsewhere in the link). */ 9431 if (sec == NULL) 9432 break; 9433 /* Fall thru */ 9434 9435 case R_PPC_PLT16_HA: 9436 case R_PPC_GOT16_HA: 9437 case R_PPC_GOT_TLSGD16_HA: 9438 case R_PPC_GOT_TLSLD16_HA: 9439 case R_PPC_GOT_TPREL16_HA: 9440 case R_PPC_GOT_DTPREL16_HA: 9441 /* Add 0x10000 if sign bit in 0:15 is set. 9442 Bits 0:15 are not used. */ 9443 addend += 0x8000; 9444 break; 9445 9446 case R_PPC_ADDR16: 9447 case R_PPC_ADDR16_LO: 9448 case R_PPC_GOT16: 9449 case R_PPC_GOT16_LO: 9450 case R_PPC_SDAREL16: 9451 case R_PPC_SECTOFF: 9452 case R_PPC_SECTOFF_LO: 9453 case R_PPC_DTPREL16: 9454 case R_PPC_DTPREL16_LO: 9455 case R_PPC_TPREL16: 9456 case R_PPC_TPREL16_LO: 9457 case R_PPC_GOT_TLSGD16: 9458 case R_PPC_GOT_TLSGD16_LO: 9459 case R_PPC_GOT_TLSLD16: 9460 case R_PPC_GOT_TLSLD16_LO: 9461 case R_PPC_GOT_DTPREL16: 9462 case R_PPC_GOT_DTPREL16_LO: 9463 case R_PPC_GOT_TPREL16: 9464 case R_PPC_GOT_TPREL16_LO: 9465 { 9466 /* The 32-bit ABI lacks proper relocations to deal with 9467 certain 64-bit instructions. Prevent damage to bits 9468 that make up part of the insn opcode. */ 9469 unsigned int insn, mask, lobit; 9470 9471 insn = bfd_get_32 (output_bfd, 9472 contents + rel->r_offset - d_offset); 9473 mask = 0; 9474 if (is_insn_ds_form (insn)) 9475 mask = 3; 9476 else if (is_insn_dq_form (insn)) 9477 mask = 15; 9478 else 9479 break; 9480 relocation += addend; 9481 addend = insn & mask; 9482 lobit = mask & relocation; 9483 if (lobit != 0) 9484 { 9485 relocation ^= lobit; 9486 info->callbacks->einfo 9487 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"), 9488 input_bfd, input_section, rel->r_offset, 9489 howto->name, sym_name, mask + 1); 9490 bfd_set_error (bfd_error_bad_value); 9491 ret = FALSE; 9492 } 9493 } 9494 break; 9495 } 9496 9497#ifdef DEBUG 9498 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " 9499 "offset = %ld, addend = %ld\n", 9500 howto->name, 9501 (int) r_type, 9502 sym_name, 9503 r_symndx, 9504 (long) rel->r_offset, 9505 (long) addend); 9506#endif 9507 9508 if (unresolved_reloc 9509 && !((input_section->flags & SEC_DEBUGGING) != 0 9510 && h->def_dynamic) 9511 && _bfd_elf_section_offset (output_bfd, info, input_section, 9512 rel->r_offset) != (bfd_vma) -1) 9513 { 9514 info->callbacks->einfo 9515 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"), 9516 input_bfd, input_section, rel->r_offset, 9517 howto->name, 9518 sym_name); 9519 ret = FALSE; 9520 } 9521 9522 /* 16-bit fields in insns mostly have signed values, but a 9523 few insns have 16-bit unsigned values. Really, we should 9524 have different reloc types. */ 9525 if (howto->complain_on_overflow != complain_overflow_dont 9526 && howto->dst_mask == 0xffff 9527 && (input_section->flags & SEC_CODE) != 0) 9528 { 9529 enum complain_overflow complain = complain_overflow_signed; 9530 9531 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0) 9532 { 9533 unsigned int insn; 9534 9535 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); 9536 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) 9537 complain = complain_overflow_bitfield; 9538 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */ 9539 || (insn & (0x3f << 26)) == 24u << 26 /* ori */ 9540 || (insn & (0x3f << 26)) == 26u << 26 /* xori */) 9541 complain = complain_overflow_unsigned; 9542 } 9543 if (howto->complain_on_overflow != complain) 9544 { 9545 alt_howto = *howto; 9546 alt_howto.complain_on_overflow = complain; 9547 howto = &alt_howto; 9548 } 9549 } 9550 9551 if (r_type == R_PPC_REL16DX_HA) 9552 { 9553 /* Split field reloc isn't handled by _bfd_final_link_relocate. */ 9554 if (rel->r_offset + 4 > input_section->size) 9555 r = bfd_reloc_outofrange; 9556 else 9557 { 9558 unsigned int insn; 9559 9560 relocation += addend; 9561 relocation -= (rel->r_offset 9562 + input_section->output_offset 9563 + input_section->output_section->vma); 9564 relocation >>= 16; 9565 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 9566 insn &= ~0x1fffc1; 9567 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15); 9568 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 9569 r = bfd_reloc_ok; 9570 } 9571 } 9572 else 9573 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, 9574 rel->r_offset, relocation, addend); 9575 9576 if (r != bfd_reloc_ok) 9577 { 9578 if (r == bfd_reloc_overflow) 9579 { 9580 overflow: 9581 /* On code like "if (foo) foo();" don't report overflow 9582 on a branch to zero when foo is undefined. */ 9583 if (!warned 9584 && !(h != NULL 9585 && (h->root.type == bfd_link_hash_undefweak 9586 || h->root.type == bfd_link_hash_undefined) 9587 && is_branch_reloc (r_type))) 9588 info->callbacks->reloc_overflow 9589 (info, (h ? &h->root : NULL), sym_name, howto->name, 9590 rel->r_addend, input_bfd, input_section, rel->r_offset); 9591 } 9592 else 9593 { 9594 info->callbacks->einfo 9595 (_("%P: %H: %s reloc against `%s': error %d\n"), 9596 input_bfd, input_section, rel->r_offset, 9597 howto->name, sym_name, (int) r); 9598 ret = FALSE; 9599 } 9600 } 9601 copy_reloc: 9602 if (wrel != rel) 9603 *wrel = *rel; 9604 } 9605 9606 if (wrel != rel) 9607 { 9608 Elf_Internal_Shdr *rel_hdr; 9609 size_t deleted = rel - wrel; 9610 9611 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); 9612 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; 9613 if (rel_hdr->sh_size == 0) 9614 { 9615 /* It is too late to remove an empty reloc section. Leave 9616 one NONE reloc. 9617 ??? What is wrong with an empty section??? */ 9618 rel_hdr->sh_size = rel_hdr->sh_entsize; 9619 deleted -= 1; 9620 wrel++; 9621 } 9622 relend = wrel; 9623 rel_hdr = _bfd_elf_single_rel_hdr (input_section); 9624 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; 9625 input_section->reloc_count -= deleted; 9626 } 9627 9628#ifdef DEBUG 9629 fprintf (stderr, "\n"); 9630#endif 9631 9632 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET 9633 && input_section->size != input_section->rawsize 9634 && (strcmp (input_section->output_section->name, ".init") == 0 9635 || strcmp (input_section->output_section->name, ".fini") == 0)) 9636 { 9637 /* Branch around the trampolines. */ 9638 unsigned int insn = B + input_section->size - input_section->rawsize; 9639 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize); 9640 } 9641 9642 if (htab->params->ppc476_workaround 9643 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET 9644 && (!bfd_link_relocatable (info) 9645 || (input_section->output_section->alignment_power 9646 >= htab->params->pagesize_p2))) 9647 { 9648 bfd_vma start_addr, end_addr, addr; 9649 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 9650 9651 if (relax_info->workaround_size != 0) 9652 { 9653 bfd_byte *p; 9654 unsigned int n; 9655 bfd_byte fill[4]; 9656 9657 bfd_put_32 (input_bfd, BA, fill); 9658 p = contents + input_section->size - relax_info->workaround_size; 9659 n = relax_info->workaround_size >> 2; 9660 while (n--) 9661 { 9662 memcpy (p, fill, 4); 9663 p += 4; 9664 } 9665 } 9666 9667 /* The idea is: Replace the last instruction on a page with a 9668 branch to a patch area. Put the insn there followed by a 9669 branch back to the next page. Complicated a little by 9670 needing to handle moved conditional branches, and by not 9671 wanting to touch data-in-text. */ 9672 9673 start_addr = (input_section->output_section->vma 9674 + input_section->output_offset); 9675 end_addr = (start_addr + input_section->size 9676 - relax_info->workaround_size); 9677 for (addr = ((start_addr & -pagesize) + pagesize - 4); 9678 addr < end_addr; 9679 addr += pagesize) 9680 { 9681 bfd_vma offset = addr - start_addr; 9682 Elf_Internal_Rela *lo, *hi; 9683 bfd_boolean is_data; 9684 bfd_vma patch_off, patch_addr; 9685 unsigned int insn; 9686 9687 /* Do we have a data reloc at this offset? If so, leave 9688 the word alone. */ 9689 is_data = FALSE; 9690 lo = relocs; 9691 hi = relend; 9692 rel = NULL; 9693 while (lo < hi) 9694 { 9695 rel = lo + (hi - lo) / 2; 9696 if (rel->r_offset < offset) 9697 lo = rel + 1; 9698 else if (rel->r_offset > offset + 3) 9699 hi = rel; 9700 else 9701 { 9702 switch (ELF32_R_TYPE (rel->r_info)) 9703 { 9704 case R_PPC_ADDR32: 9705 case R_PPC_UADDR32: 9706 case R_PPC_REL32: 9707 case R_PPC_ADDR30: 9708 is_data = TRUE; 9709 break; 9710 default: 9711 break; 9712 } 9713 break; 9714 } 9715 } 9716 if (is_data) 9717 continue; 9718 9719 /* Some instructions can be left alone too. Unconditional 9720 branches, except for bcctr with BO=0x14 (bctr, bctrl), 9721 avoid the icache failure. 9722 9723 The problem occurs due to prefetch across a page boundary 9724 where stale instructions can be fetched from the next 9725 page, and the mechanism for flushing these bad 9726 instructions fails under certain circumstances. The 9727 unconditional branches: 9728 1) Branch: b, bl, ba, bla, 9729 2) Branch Conditional: bc, bca, bcl, bcla, 9730 3) Branch Conditional to Link Register: bclr, bclrl, 9731 where (2) and (3) have BO=0x14 making them unconditional, 9732 prevent the bad prefetch because the prefetch itself is 9733 affected by these instructions. This happens even if the 9734 instruction is not executed. 9735 9736 A bctr example: 9737 . 9738 . lis 9,new_page@ha 9739 . addi 9,9,new_page@l 9740 . mtctr 9 9741 . bctr 9742 . nop 9743 . nop 9744 . new_page: 9745 . 9746 The bctr is not predicted taken due to ctr not being 9747 ready, so prefetch continues on past the bctr into the 9748 new page which might have stale instructions. If they 9749 fail to be flushed, then they will be executed after the 9750 bctr executes. Either of the following modifications 9751 prevent the bad prefetch from happening in the first 9752 place: 9753 . 9754 . lis 9,new_page@ha lis 9,new_page@ha 9755 . addi 9,9,new_page@l addi 9,9,new_page@l 9756 . mtctr 9 mtctr 9 9757 . bctr bctr 9758 . nop b somewhere_else 9759 . b somewhere_else nop 9760 . new_page: new_page: 9761 . */ 9762 insn = bfd_get_32 (input_bfd, contents + offset); 9763 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */ 9764 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/ 9765 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */ 9766 || ((insn & (0x3f << 26)) == (19u << 26) 9767 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */ 9768 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */ 9769 continue; 9770 9771 patch_addr = (start_addr + input_section->size 9772 - relax_info->workaround_size); 9773 patch_addr = (patch_addr + 15) & -16; 9774 patch_off = patch_addr - start_addr; 9775 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset); 9776 9777 if (rel != NULL 9778 && rel->r_offset >= offset 9779 && rel->r_offset < offset + 4) 9780 { 9781 asection *sreloc; 9782 9783 /* If the insn we are patching had a reloc, adjust the 9784 reloc r_offset so that the reloc applies to the moved 9785 location. This matters for -r and --emit-relocs. */ 9786 if (rel + 1 != relend) 9787 { 9788 Elf_Internal_Rela tmp = *rel; 9789 9790 /* Keep the relocs sorted by r_offset. */ 9791 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel)); 9792 relend[-1] = tmp; 9793 } 9794 relend[-1].r_offset += patch_off - offset; 9795 9796 /* Adjust REL16 addends too. */ 9797 switch (ELF32_R_TYPE (relend[-1].r_info)) 9798 { 9799 case R_PPC_REL16: 9800 case R_PPC_REL16_LO: 9801 case R_PPC_REL16_HI: 9802 case R_PPC_REL16_HA: 9803 relend[-1].r_addend += patch_off - offset; 9804 break; 9805 default: 9806 break; 9807 } 9808 9809 /* If we are building a PIE or shared library with 9810 non-PIC objects, perhaps we had a dynamic reloc too? 9811 If so, the dynamic reloc must move with the insn. */ 9812 sreloc = elf_section_data (input_section)->sreloc; 9813 if (sreloc != NULL) 9814 { 9815 Elf32_External_Rela *slo, *shi, *srelend; 9816 bfd_vma soffset; 9817 9818 slo = (Elf32_External_Rela *) sreloc->contents; 9819 shi = srelend = slo + sreloc->reloc_count; 9820 soffset = (offset + input_section->output_section->vma 9821 + input_section->output_offset); 9822 while (slo < shi) 9823 { 9824 Elf32_External_Rela *srel = slo + (shi - slo) / 2; 9825 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel, 9826 &outrel); 9827 if (outrel.r_offset < soffset) 9828 slo = srel + 1; 9829 else if (outrel.r_offset > soffset + 3) 9830 shi = srel; 9831 else 9832 { 9833 if (srel + 1 != srelend) 9834 { 9835 memmove (srel, srel + 1, 9836 (srelend - (srel + 1)) * sizeof (*srel)); 9837 srel = srelend - 1; 9838 } 9839 outrel.r_offset += patch_off - offset; 9840 bfd_elf32_swap_reloca_out (output_bfd, &outrel, 9841 (bfd_byte *) srel); 9842 break; 9843 } 9844 } 9845 } 9846 } 9847 else 9848 rel = NULL; 9849 9850 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */ 9851 && (insn & 2) == 0 /* relative */) 9852 { 9853 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000; 9854 9855 delta += offset - patch_off; 9856 if (bfd_link_relocatable (info) && rel != NULL) 9857 delta = 0; 9858 if (!bfd_link_relocatable (info) && rel != NULL) 9859 { 9860 enum elf_ppc_reloc_type r_type; 9861 9862 r_type = ELF32_R_TYPE (relend[-1].r_info); 9863 if (r_type == R_PPC_REL14_BRTAKEN) 9864 insn |= BRANCH_PREDICT_BIT; 9865 else if (r_type == R_PPC_REL14_BRNTAKEN) 9866 insn &= ~BRANCH_PREDICT_BIT; 9867 else 9868 BFD_ASSERT (r_type == R_PPC_REL14); 9869 9870 if ((r_type == R_PPC_REL14_BRTAKEN 9871 || r_type == R_PPC_REL14_BRNTAKEN) 9872 && delta + 0x8000 < 0x10000 9873 && (bfd_signed_vma) delta < 0) 9874 insn ^= BRANCH_PREDICT_BIT; 9875 } 9876 if (delta + 0x8000 < 0x10000) 9877 { 9878 bfd_put_32 (input_bfd, 9879 (insn & ~0xfffc) | (delta & 0xfffc), 9880 contents + patch_off); 9881 patch_off += 4; 9882 bfd_put_32 (input_bfd, 9883 B | ((offset + 4 - patch_off) & 0x3fffffc), 9884 contents + patch_off); 9885 patch_off += 4; 9886 } 9887 else 9888 { 9889 if (rel != NULL) 9890 { 9891 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info); 9892 9893 relend[-1].r_offset += 8; 9894 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24); 9895 } 9896 bfd_put_32 (input_bfd, 9897 (insn & ~0xfffc) | 8, 9898 contents + patch_off); 9899 patch_off += 4; 9900 bfd_put_32 (input_bfd, 9901 B | ((offset + 4 - patch_off) & 0x3fffffc), 9902 contents + patch_off); 9903 patch_off += 4; 9904 bfd_put_32 (input_bfd, 9905 B | ((delta - 8) & 0x3fffffc), 9906 contents + patch_off); 9907 patch_off += 4; 9908 } 9909 } 9910 else 9911 { 9912 bfd_put_32 (input_bfd, insn, contents + patch_off); 9913 patch_off += 4; 9914 bfd_put_32 (input_bfd, 9915 B | ((offset + 4 - patch_off) & 0x3fffffc), 9916 contents + patch_off); 9917 patch_off += 4; 9918 } 9919 BFD_ASSERT (patch_off <= input_section->size); 9920 relax_info->workaround_size = input_section->size - patch_off; 9921 } 9922 } 9923 9924 return ret; 9925} 9926 9927/* Finish up dynamic symbol handling. We set the contents of various 9928 dynamic sections here. */ 9929 9930static bfd_boolean 9931ppc_elf_finish_dynamic_symbol (bfd *output_bfd, 9932 struct bfd_link_info *info, 9933 struct elf_link_hash_entry *h, 9934 Elf_Internal_Sym *sym) 9935{ 9936 struct ppc_elf_link_hash_table *htab; 9937 struct plt_entry *ent; 9938 bfd_boolean doneone; 9939 9940#ifdef DEBUG 9941 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", 9942 h->root.root.string); 9943#endif 9944 9945 htab = ppc_elf_hash_table (info); 9946 BFD_ASSERT (htab->elf.dynobj != NULL); 9947 9948 doneone = FALSE; 9949 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 9950 if (ent->plt.offset != (bfd_vma) -1) 9951 { 9952 if (!doneone) 9953 { 9954 Elf_Internal_Rela rela; 9955 bfd_byte *loc; 9956 bfd_vma reloc_index; 9957 9958 if (htab->plt_type == PLT_NEW 9959 || !htab->elf.dynamic_sections_created 9960 || h->dynindx == -1) 9961 reloc_index = ent->plt.offset / 4; 9962 else 9963 { 9964 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) 9965 / htab->plt_slot_size); 9966 if (reloc_index > PLT_NUM_SINGLE_ENTRIES 9967 && htab->plt_type == PLT_OLD) 9968 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; 9969 } 9970 9971 /* This symbol has an entry in the procedure linkage table. 9972 Set it up. */ 9973 if (htab->plt_type == PLT_VXWORKS 9974 && htab->elf.dynamic_sections_created 9975 && h->dynindx != -1) 9976 { 9977 bfd_vma got_offset; 9978 const bfd_vma *plt_entry; 9979 9980 /* The first three entries in .got.plt are reserved. */ 9981 got_offset = (reloc_index + 3) * 4; 9982 9983 /* Use the right PLT. */ 9984 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry 9985 : ppc_elf_vxworks_plt_entry; 9986 9987 /* Fill in the .plt on VxWorks. */ 9988 if (bfd_link_pic (info)) 9989 { 9990 bfd_put_32 (output_bfd, 9991 plt_entry[0] | PPC_HA (got_offset), 9992 htab->plt->contents + ent->plt.offset + 0); 9993 bfd_put_32 (output_bfd, 9994 plt_entry[1] | PPC_LO (got_offset), 9995 htab->plt->contents + ent->plt.offset + 4); 9996 } 9997 else 9998 { 9999 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot); 10000 10001 bfd_put_32 (output_bfd, 10002 plt_entry[0] | PPC_HA (got_loc), 10003 htab->plt->contents + ent->plt.offset + 0); 10004 bfd_put_32 (output_bfd, 10005 plt_entry[1] | PPC_LO (got_loc), 10006 htab->plt->contents + ent->plt.offset + 4); 10007 } 10008 10009 bfd_put_32 (output_bfd, plt_entry[2], 10010 htab->plt->contents + ent->plt.offset + 8); 10011 bfd_put_32 (output_bfd, plt_entry[3], 10012 htab->plt->contents + ent->plt.offset + 12); 10013 10014 /* This instruction is an immediate load. The value loaded is 10015 the byte offset of the R_PPC_JMP_SLOT relocation from the 10016 start of the .rela.plt section. The value is stored in the 10017 low-order 16 bits of the load instruction. */ 10018 /* NOTE: It appears that this is now an index rather than a 10019 prescaled offset. */ 10020 bfd_put_32 (output_bfd, 10021 plt_entry[4] | reloc_index, 10022 htab->plt->contents + ent->plt.offset + 16); 10023 /* This instruction is a PC-relative branch whose target is 10024 the start of the PLT section. The address of this branch 10025 instruction is 20 bytes beyond the start of this PLT entry. 10026 The address is encoded in bits 6-29, inclusive. The value 10027 stored is right-shifted by two bits, permitting a 26-bit 10028 offset. */ 10029 bfd_put_32 (output_bfd, 10030 (plt_entry[5] 10031 | (-(ent->plt.offset + 20) & 0x03fffffc)), 10032 htab->plt->contents + ent->plt.offset + 20); 10033 bfd_put_32 (output_bfd, plt_entry[6], 10034 htab->plt->contents + ent->plt.offset + 24); 10035 bfd_put_32 (output_bfd, plt_entry[7], 10036 htab->plt->contents + ent->plt.offset + 28); 10037 10038 /* Fill in the GOT entry corresponding to this PLT slot with 10039 the address immediately after the "bctr" instruction 10040 in this PLT entry. */ 10041 bfd_put_32 (output_bfd, (htab->plt->output_section->vma 10042 + htab->plt->output_offset 10043 + ent->plt.offset + 16), 10044 htab->sgotplt->contents + got_offset); 10045 10046 if (!bfd_link_pic (info)) 10047 { 10048 /* Fill in a couple of entries in .rela.plt.unloaded. */ 10049 loc = htab->srelplt2->contents 10050 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index 10051 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) 10052 * sizeof (Elf32_External_Rela)); 10053 10054 /* Provide the @ha relocation for the first instruction. */ 10055 rela.r_offset = (htab->plt->output_section->vma 10056 + htab->plt->output_offset 10057 + ent->plt.offset + 2); 10058 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 10059 R_PPC_ADDR16_HA); 10060 rela.r_addend = got_offset; 10061 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10062 loc += sizeof (Elf32_External_Rela); 10063 10064 /* Provide the @l relocation for the second instruction. */ 10065 rela.r_offset = (htab->plt->output_section->vma 10066 + htab->plt->output_offset 10067 + ent->plt.offset + 6); 10068 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 10069 R_PPC_ADDR16_LO); 10070 rela.r_addend = got_offset; 10071 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10072 loc += sizeof (Elf32_External_Rela); 10073 10074 /* Provide a relocation for the GOT entry corresponding to this 10075 PLT slot. Point it at the middle of the .plt entry. */ 10076 rela.r_offset = (htab->sgotplt->output_section->vma 10077 + htab->sgotplt->output_offset 10078 + got_offset); 10079 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, 10080 R_PPC_ADDR32); 10081 rela.r_addend = ent->plt.offset + 16; 10082 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10083 } 10084 10085 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. 10086 In particular, the offset for the relocation is not the 10087 address of the PLT entry for this function, as specified 10088 by the ABI. Instead, the offset is set to the address of 10089 the GOT slot for this function. See EABI 4.4.4.1. */ 10090 rela.r_offset = (htab->sgotplt->output_section->vma 10091 + htab->sgotplt->output_offset 10092 + got_offset); 10093 10094 } 10095 else 10096 { 10097 asection *splt = htab->plt; 10098 if (!htab->elf.dynamic_sections_created 10099 || h->dynindx == -1) 10100 splt = htab->iplt; 10101 10102 rela.r_offset = (splt->output_section->vma 10103 + splt->output_offset 10104 + ent->plt.offset); 10105 if (htab->plt_type == PLT_OLD 10106 || !htab->elf.dynamic_sections_created 10107 || h->dynindx == -1) 10108 { 10109 /* We don't need to fill in the .plt. The ppc dynamic 10110 linker will fill it in. */ 10111 } 10112 else 10113 { 10114 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset 10115 + htab->glink->output_section->vma 10116 + htab->glink->output_offset); 10117 bfd_put_32 (output_bfd, val, 10118 splt->contents + ent->plt.offset); 10119 } 10120 } 10121 10122 /* Fill in the entry in the .rela.plt section. */ 10123 rela.r_addend = 0; 10124 if (!htab->elf.dynamic_sections_created 10125 || h->dynindx == -1) 10126 { 10127 BFD_ASSERT (h->type == STT_GNU_IFUNC 10128 && h->def_regular 10129 && (h->root.type == bfd_link_hash_defined 10130 || h->root.type == bfd_link_hash_defweak)); 10131 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 10132 rela.r_addend = SYM_VAL (h); 10133 } 10134 else 10135 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); 10136 10137 if (!htab->elf.dynamic_sections_created 10138 || h->dynindx == -1) 10139 loc = (htab->reliplt->contents 10140 + (htab->reliplt->reloc_count++ 10141 * sizeof (Elf32_External_Rela))); 10142 else 10143 loc = (htab->relplt->contents 10144 + reloc_index * sizeof (Elf32_External_Rela)); 10145 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10146 10147 if (!h->def_regular) 10148 { 10149 /* Mark the symbol as undefined, rather than as 10150 defined in the .plt section. Leave the value if 10151 there were any relocations where pointer equality 10152 matters (this is a clue for the dynamic linker, to 10153 make function pointer comparisons work between an 10154 application and shared library), otherwise set it 10155 to zero. */ 10156 sym->st_shndx = SHN_UNDEF; 10157 if (!h->pointer_equality_needed) 10158 sym->st_value = 0; 10159 else if (!h->ref_regular_nonweak) 10160 { 10161 /* This breaks function pointer comparisons, but 10162 that is better than breaking tests for a NULL 10163 function pointer. */ 10164 sym->st_value = 0; 10165 } 10166 } 10167 else if (h->type == STT_GNU_IFUNC 10168 && !bfd_link_pic (info)) 10169 { 10170 /* Set the value of ifunc symbols in a non-pie 10171 executable to the glink entry. This is to avoid 10172 text relocations. We can't do this for ifunc in 10173 allocate_dynrelocs, as we do for normal dynamic 10174 function symbols with plt entries, because we need 10175 to keep the original value around for the ifunc 10176 relocation. */ 10177 sym->st_shndx = (_bfd_elf_section_from_bfd_section 10178 (output_bfd, htab->glink->output_section)); 10179 sym->st_value = (ent->glink_offset 10180 + htab->glink->output_offset 10181 + htab->glink->output_section->vma); 10182 } 10183 doneone = TRUE; 10184 } 10185 10186 if (htab->plt_type == PLT_NEW 10187 || !htab->elf.dynamic_sections_created 10188 || h->dynindx == -1) 10189 { 10190 unsigned char *p; 10191 asection *splt = htab->plt; 10192 if (!htab->elf.dynamic_sections_created 10193 || h->dynindx == -1) 10194 splt = htab->iplt; 10195 10196 p = (unsigned char *) htab->glink->contents + ent->glink_offset; 10197 10198 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt) 10199 { 10200 bfd_put_32 (output_bfd, LWZ_11_3, p); 10201 p += 4; 10202 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p); 10203 p += 4; 10204 bfd_put_32 (output_bfd, MR_0_3, p); 10205 p += 4; 10206 bfd_put_32 (output_bfd, CMPWI_11_0, p); 10207 p += 4; 10208 bfd_put_32 (output_bfd, ADD_3_12_2, p); 10209 p += 4; 10210 bfd_put_32 (output_bfd, BEQLR, p); 10211 p += 4; 10212 bfd_put_32 (output_bfd, MR_3_0, p); 10213 p += 4; 10214 bfd_put_32 (output_bfd, NOP, p); 10215 p += 4; 10216 } 10217 10218 write_glink_stub (ent, splt, p, info); 10219 10220 if (!bfd_link_pic (info)) 10221 /* We only need one non-PIC glink stub. */ 10222 break; 10223 } 10224 else 10225 break; 10226 } 10227 10228 if (h->needs_copy) 10229 { 10230 asection *s; 10231 Elf_Internal_Rela rela; 10232 bfd_byte *loc; 10233 10234 /* This symbols needs a copy reloc. Set it up. */ 10235 10236#ifdef DEBUG 10237 fprintf (stderr, ", copy"); 10238#endif 10239 10240 BFD_ASSERT (h->dynindx != -1); 10241 10242 if (ppc_elf_hash_entry (h)->has_sda_refs) 10243 s = htab->relsbss; 10244 else 10245 s = htab->relbss; 10246 BFD_ASSERT (s != NULL); 10247 10248 rela.r_offset = SYM_VAL (h); 10249 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); 10250 rela.r_addend = 0; 10251 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 10252 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10253 } 10254 10255#ifdef DEBUG 10256 fprintf (stderr, "\n"); 10257#endif 10258 10259 return TRUE; 10260} 10261 10262static enum elf_reloc_type_class 10263ppc_elf_reloc_type_class (const struct bfd_link_info *info, 10264 const asection *rel_sec, 10265 const Elf_Internal_Rela *rela) 10266{ 10267 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 10268 10269 if (rel_sec == htab->reliplt) 10270 return reloc_class_ifunc; 10271 10272 switch (ELF32_R_TYPE (rela->r_info)) 10273 { 10274 case R_PPC_RELATIVE: 10275 return reloc_class_relative; 10276 case R_PPC_JMP_SLOT: 10277 return reloc_class_plt; 10278 case R_PPC_COPY: 10279 return reloc_class_copy; 10280 default: 10281 return reloc_class_normal; 10282 } 10283} 10284 10285/* Finish up the dynamic sections. */ 10286 10287static bfd_boolean 10288ppc_elf_finish_dynamic_sections (bfd *output_bfd, 10289 struct bfd_link_info *info) 10290{ 10291 asection *sdyn; 10292 asection *splt; 10293 struct ppc_elf_link_hash_table *htab; 10294 bfd_vma got; 10295 bfd *dynobj; 10296 bfd_boolean ret = TRUE; 10297 10298#ifdef DEBUG 10299 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); 10300#endif 10301 10302 htab = ppc_elf_hash_table (info); 10303 dynobj = elf_hash_table (info)->dynobj; 10304 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 10305 if (htab->is_vxworks) 10306 splt = bfd_get_linker_section (dynobj, ".plt"); 10307 else 10308 splt = NULL; 10309 10310 got = 0; 10311 if (htab->elf.hgot != NULL) 10312 got = SYM_VAL (htab->elf.hgot); 10313 10314 if (htab->elf.dynamic_sections_created) 10315 { 10316 Elf32_External_Dyn *dyncon, *dynconend; 10317 10318 BFD_ASSERT (htab->plt != NULL && sdyn != NULL); 10319 10320 dyncon = (Elf32_External_Dyn *) sdyn->contents; 10321 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 10322 for (; dyncon < dynconend; dyncon++) 10323 { 10324 Elf_Internal_Dyn dyn; 10325 asection *s; 10326 10327 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 10328 10329 switch (dyn.d_tag) 10330 { 10331 case DT_PLTGOT: 10332 if (htab->is_vxworks) 10333 s = htab->sgotplt; 10334 else 10335 s = htab->plt; 10336 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 10337 break; 10338 10339 case DT_PLTRELSZ: 10340 dyn.d_un.d_val = htab->relplt->size; 10341 break; 10342 10343 case DT_JMPREL: 10344 s = htab->relplt; 10345 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 10346 break; 10347 10348 case DT_PPC_GOT: 10349 dyn.d_un.d_ptr = got; 10350 break; 10351 10352 case DT_RELASZ: 10353 if (htab->is_vxworks) 10354 { 10355 if (htab->relplt) 10356 dyn.d_un.d_ptr -= htab->relplt->size; 10357 break; 10358 } 10359 continue; 10360 10361 default: 10362 if (htab->is_vxworks 10363 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) 10364 break; 10365 continue; 10366 } 10367 10368 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 10369 } 10370 } 10371 10372 if (htab->got != NULL) 10373 { 10374 if (htab->elf.hgot->root.u.def.section == htab->got 10375 || htab->elf.hgot->root.u.def.section == htab->sgotplt) 10376 { 10377 unsigned char *p = htab->elf.hgot->root.u.def.section->contents; 10378 10379 p += htab->elf.hgot->root.u.def.value; 10380 if (htab->plt_type == PLT_OLD) 10381 { 10382 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 10383 so that a function can easily find the address of 10384 _GLOBAL_OFFSET_TABLE_. */ 10385 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4 10386 < htab->elf.hgot->root.u.def.section->size); 10387 bfd_put_32 (output_bfd, 0x4e800021, p - 4); 10388 } 10389 10390 if (sdyn != NULL) 10391 { 10392 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset; 10393 BFD_ASSERT (htab->elf.hgot->root.u.def.value 10394 < htab->elf.hgot->root.u.def.section->size); 10395 bfd_put_32 (output_bfd, val, p); 10396 } 10397 } 10398 else 10399 { 10400 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"), 10401 htab->elf.hgot->root.root.string, 10402 (htab->sgotplt != NULL 10403 ? htab->sgotplt->name : htab->got->name)); 10404 bfd_set_error (bfd_error_bad_value); 10405 ret = FALSE; 10406 } 10407 10408 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; 10409 } 10410 10411 /* Fill in the first entry in the VxWorks procedure linkage table. */ 10412 if (splt && splt->size > 0) 10413 { 10414 /* Use the right PLT. */ 10415 const bfd_vma *plt_entry = (bfd_link_pic (info) 10416 ? ppc_elf_vxworks_pic_plt0_entry 10417 : ppc_elf_vxworks_plt0_entry); 10418 10419 if (!bfd_link_pic (info)) 10420 { 10421 bfd_vma got_value = SYM_VAL (htab->elf.hgot); 10422 10423 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value), 10424 splt->contents + 0); 10425 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value), 10426 splt->contents + 4); 10427 } 10428 else 10429 { 10430 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); 10431 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); 10432 } 10433 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); 10434 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); 10435 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); 10436 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); 10437 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); 10438 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); 10439 10440 if (! bfd_link_pic (info)) 10441 { 10442 Elf_Internal_Rela rela; 10443 bfd_byte *loc; 10444 10445 loc = htab->srelplt2->contents; 10446 10447 /* Output the @ha relocation for the first instruction. */ 10448 rela.r_offset = (htab->plt->output_section->vma 10449 + htab->plt->output_offset 10450 + 2); 10451 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 10452 rela.r_addend = 0; 10453 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10454 loc += sizeof (Elf32_External_Rela); 10455 10456 /* Output the @l relocation for the second instruction. */ 10457 rela.r_offset = (htab->plt->output_section->vma 10458 + htab->plt->output_offset 10459 + 6); 10460 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 10461 rela.r_addend = 0; 10462 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10463 loc += sizeof (Elf32_External_Rela); 10464 10465 /* Fix up the remaining relocations. They may have the wrong 10466 symbol index for _G_O_T_ or _P_L_T_ depending on the order 10467 in which symbols were output. */ 10468 while (loc < htab->srelplt2->contents + htab->srelplt2->size) 10469 { 10470 Elf_Internal_Rela rel; 10471 10472 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10473 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 10474 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10475 loc += sizeof (Elf32_External_Rela); 10476 10477 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10478 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 10479 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10480 loc += sizeof (Elf32_External_Rela); 10481 10482 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10483 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); 10484 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10485 loc += sizeof (Elf32_External_Rela); 10486 } 10487 } 10488 } 10489 10490 if (htab->glink != NULL 10491 && htab->glink->contents != NULL 10492 && htab->elf.dynamic_sections_created) 10493 { 10494 unsigned char *p; 10495 unsigned char *endp; 10496 bfd_vma res0; 10497 unsigned int i; 10498 10499 /* 10500 * PIC glink code is the following: 10501 * 10502 * # ith PLT code stub. 10503 * addis 11,30,(plt+(i-1)*4-got)@ha 10504 * lwz 11,(plt+(i-1)*4-got)@l(11) 10505 * mtctr 11 10506 * bctr 10507 * 10508 * # A table of branches, one for each plt entry. 10509 * # The idea is that the plt call stub loads ctr and r11 with these 10510 * # addresses, so (r11 - res_0) gives the plt index * 4. 10511 * res_0: b PLTresolve 10512 * res_1: b PLTresolve 10513 * . 10514 * # Some number of entries towards the end can be nops 10515 * res_n_m3: nop 10516 * res_n_m2: nop 10517 * res_n_m1: 10518 * 10519 * PLTresolve: 10520 * addis 11,11,(1f-res_0)@ha 10521 * mflr 0 10522 * bcl 20,31,1f 10523 * 1: addi 11,11,(1b-res_0)@l 10524 * mflr 12 10525 * mtlr 0 10526 * sub 11,11,12 # r11 = index * 4 10527 * addis 12,12,(got+4-1b)@ha 10528 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve 10529 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address 10530 * mtctr 0 10531 * add 0,11,11 10532 * add 11,0,11 # r11 = index * 12 = reloc offset. 10533 * bctr 10534 */ 10535 static const unsigned int pic_plt_resolve[] = 10536 { 10537 ADDIS_11_11, 10538 MFLR_0, 10539 BCL_20_31, 10540 ADDI_11_11, 10541 MFLR_12, 10542 MTLR_0, 10543 SUB_11_11_12, 10544 ADDIS_12_12, 10545 LWZ_0_12, 10546 LWZ_12_12, 10547 MTCTR_0, 10548 ADD_0_11_11, 10549 ADD_11_0_11, 10550 BCTR, 10551 NOP, 10552 NOP 10553 }; 10554 10555 /* 10556 * Non-PIC glink code is a little simpler. 10557 * 10558 * # ith PLT code stub. 10559 * lis 11,(plt+(i-1)*4)@ha 10560 * lwz 11,(plt+(i-1)*4)@l(11) 10561 * mtctr 11 10562 * bctr 10563 * 10564 * The branch table is the same, then comes 10565 * 10566 * PLTresolve: 10567 * lis 12,(got+4)@ha 10568 * addis 11,11,(-res_0)@ha 10569 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve 10570 * addi 11,11,(-res_0)@l # r11 = index * 4 10571 * mtctr 0 10572 * add 0,11,11 10573 * lwz 12,(got+8)@l(12) # got[2] contains the map address 10574 * add 11,0,11 # r11 = index * 12 = reloc offset. 10575 * bctr 10576 */ 10577 static const unsigned int plt_resolve[] = 10578 { 10579 LIS_12, 10580 ADDIS_11_11, 10581 LWZ_0_12, 10582 ADDI_11_11, 10583 MTCTR_0, 10584 ADD_0_11_11, 10585 LWZ_12_12, 10586 ADD_11_0_11, 10587 BCTR, 10588 NOP, 10589 NOP, 10590 NOP, 10591 NOP, 10592 NOP, 10593 NOP, 10594 NOP 10595 }; 10596 10597 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) 10598 abort (); 10599 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) 10600 abort (); 10601 10602 /* Build the branch table, one for each plt entry (less one), 10603 and perhaps some padding. */ 10604 p = htab->glink->contents; 10605 p += htab->glink_pltresolve; 10606 endp = htab->glink->contents; 10607 endp += htab->glink->size - GLINK_PLTRESOLVE; 10608 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4)) 10609 { 10610 bfd_put_32 (output_bfd, B + endp - p, p); 10611 p += 4; 10612 } 10613 while (p < endp) 10614 { 10615 bfd_put_32 (output_bfd, NOP, p); 10616 p += 4; 10617 } 10618 10619 res0 = (htab->glink_pltresolve 10620 + htab->glink->output_section->vma 10621 + htab->glink->output_offset); 10622 10623 if (htab->params->ppc476_workaround) 10624 { 10625 /* Ensure that a call stub at the end of a page doesn't 10626 result in prefetch over the end of the page into the 10627 glink branch table. */ 10628 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 10629 bfd_vma page_addr; 10630 bfd_vma glink_start = (htab->glink->output_section->vma 10631 + htab->glink->output_offset); 10632 10633 for (page_addr = res0 & -pagesize; 10634 page_addr > glink_start; 10635 page_addr -= pagesize) 10636 { 10637 /* We have a plt call stub that may need fixing. */ 10638 bfd_byte *loc; 10639 unsigned int insn; 10640 10641 loc = htab->glink->contents + page_addr - 4 - glink_start; 10642 insn = bfd_get_32 (output_bfd, loc); 10643 if (insn == BCTR) 10644 { 10645 /* By alignment, we know that there must be at least 10646 one other call stub before this one. */ 10647 insn = bfd_get_32 (output_bfd, loc - 16); 10648 if (insn == BCTR) 10649 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc); 10650 else 10651 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc); 10652 } 10653 } 10654 } 10655 10656 /* Last comes the PLTresolve stub. */ 10657 if (bfd_link_pic (info)) 10658 { 10659 bfd_vma bcl; 10660 10661 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) 10662 { 10663 unsigned int insn = pic_plt_resolve[i]; 10664 10665 if (htab->params->ppc476_workaround && insn == NOP) 10666 insn = BA + 0; 10667 bfd_put_32 (output_bfd, insn, p); 10668 p += 4; 10669 } 10670 p -= 4 * ARRAY_SIZE (pic_plt_resolve); 10671 10672 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 10673 + htab->glink->output_section->vma 10674 + htab->glink->output_offset); 10675 10676 bfd_put_32 (output_bfd, 10677 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); 10678 bfd_put_32 (output_bfd, 10679 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); 10680 bfd_put_32 (output_bfd, 10681 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); 10682 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) 10683 { 10684 bfd_put_32 (output_bfd, 10685 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 10686 bfd_put_32 (output_bfd, 10687 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); 10688 } 10689 else 10690 { 10691 bfd_put_32 (output_bfd, 10692 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 10693 bfd_put_32 (output_bfd, 10694 LWZ_12_12 + 4, p + 9*4); 10695 } 10696 } 10697 else 10698 { 10699 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) 10700 { 10701 unsigned int insn = plt_resolve[i]; 10702 10703 if (htab->params->ppc476_workaround && insn == NOP) 10704 insn = BA + 0; 10705 bfd_put_32 (output_bfd, insn, p); 10706 p += 4; 10707 } 10708 p -= 4 * ARRAY_SIZE (plt_resolve); 10709 10710 bfd_put_32 (output_bfd, 10711 LIS_12 + PPC_HA (got + 4), p + 0*4); 10712 bfd_put_32 (output_bfd, 10713 ADDIS_11_11 + PPC_HA (-res0), p + 1*4); 10714 bfd_put_32 (output_bfd, 10715 ADDI_11_11 + PPC_LO (-res0), p + 3*4); 10716 if (PPC_HA (got + 4) == PPC_HA (got + 8)) 10717 { 10718 bfd_put_32 (output_bfd, 10719 LWZ_0_12 + PPC_LO (got + 4), p + 2*4); 10720 bfd_put_32 (output_bfd, 10721 LWZ_12_12 + PPC_LO (got + 8), p + 6*4); 10722 } 10723 else 10724 { 10725 bfd_put_32 (output_bfd, 10726 LWZU_0_12 + PPC_LO (got + 4), p + 2*4); 10727 bfd_put_32 (output_bfd, 10728 LWZ_12_12 + 4, p + 6*4); 10729 } 10730 } 10731 } 10732 10733 if (htab->glink_eh_frame != NULL 10734 && htab->glink_eh_frame->contents != NULL) 10735 { 10736 unsigned char *p = htab->glink_eh_frame->contents; 10737 bfd_vma val; 10738 10739 p += sizeof (glink_eh_frame_cie); 10740 /* FDE length. */ 10741 p += 4; 10742 /* CIE pointer. */ 10743 p += 4; 10744 /* Offset to .glink. */ 10745 val = (htab->glink->output_section->vma 10746 + htab->glink->output_offset); 10747 val -= (htab->glink_eh_frame->output_section->vma 10748 + htab->glink_eh_frame->output_offset); 10749 val -= p - htab->glink_eh_frame->contents; 10750 bfd_put_32 (htab->elf.dynobj, val, p); 10751 10752 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME 10753 && !_bfd_elf_write_section_eh_frame (output_bfd, info, 10754 htab->glink_eh_frame, 10755 htab->glink_eh_frame->contents)) 10756 return FALSE; 10757 } 10758 10759 return ret; 10760} 10761 10762#define TARGET_LITTLE_SYM powerpc_elf32_le_vec 10763#define TARGET_LITTLE_NAME "elf32-powerpcle" 10764#define TARGET_BIG_SYM powerpc_elf32_vec 10765#define TARGET_BIG_NAME "elf32-powerpc" 10766#define ELF_ARCH bfd_arch_powerpc 10767#define ELF_TARGET_ID PPC32_ELF_DATA 10768#define ELF_MACHINE_CODE EM_PPC 10769#ifdef __QNXTARGET__ 10770#define ELF_MAXPAGESIZE 0x1000 10771#define ELF_COMMONPAGESIZE 0x1000 10772#else 10773#define ELF_MAXPAGESIZE 0x10000 10774#define ELF_COMMONPAGESIZE 0x10000 10775#endif 10776#define ELF_MINPAGESIZE 0x1000 10777#define elf_info_to_howto ppc_elf_info_to_howto 10778 10779#ifdef EM_CYGNUS_POWERPC 10780#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC 10781#endif 10782 10783#ifdef EM_PPC_OLD 10784#define ELF_MACHINE_ALT2 EM_PPC_OLD 10785#endif 10786 10787#define elf_backend_plt_not_loaded 1 10788#define elf_backend_can_gc_sections 1 10789#define elf_backend_can_refcount 1 10790#define elf_backend_rela_normal 1 10791#define elf_backend_caches_rawsize 1 10792 10793#define bfd_elf32_mkobject ppc_elf_mkobject 10794#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data 10795#define bfd_elf32_bfd_relax_section ppc_elf_relax_section 10796#define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup 10797#define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup 10798#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags 10799#define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create 10800#define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab 10801 10802#define elf_backend_object_p ppc_elf_object_p 10803#define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook 10804#define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook 10805#define elf_backend_section_from_shdr ppc_elf_section_from_shdr 10806#define elf_backend_relocate_section ppc_elf_relocate_section 10807#define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections 10808#define elf_backend_check_relocs ppc_elf_check_relocs 10809#define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol 10810#define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol 10811#define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook 10812#define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections 10813#define elf_backend_hash_symbol ppc_elf_hash_symbol 10814#define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol 10815#define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections 10816#define elf_backend_fake_sections ppc_elf_fake_sections 10817#define elf_backend_additional_program_headers ppc_elf_additional_program_headers 10818#define elf_backend_modify_segment_map ppc_elf_modify_segment_map 10819#define elf_backend_grok_prstatus ppc_elf_grok_prstatus 10820#define elf_backend_grok_psinfo ppc_elf_grok_psinfo 10821#define elf_backend_write_core_note ppc_elf_write_core_note 10822#define elf_backend_reloc_type_class ppc_elf_reloc_type_class 10823#define elf_backend_begin_write_processing ppc_elf_begin_write_processing 10824#define elf_backend_final_write_processing ppc_elf_final_write_processing 10825#define elf_backend_write_section ppc_elf_write_section 10826#define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr 10827#define elf_backend_plt_sym_val ppc_elf_plt_sym_val 10828#define elf_backend_action_discarded ppc_elf_action_discarded 10829#define elf_backend_init_index_section _bfd_elf_init_1_index_section 10830#define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags 10831#define elf_backend_section_processing ppc_elf_section_processing 10832 10833#include "elf32-target.h" 10834 10835/* FreeBSD Target */ 10836 10837#undef TARGET_LITTLE_SYM 10838#undef TARGET_LITTLE_NAME 10839 10840#undef TARGET_BIG_SYM 10841#define TARGET_BIG_SYM powerpc_elf32_fbsd_vec 10842#undef TARGET_BIG_NAME 10843#define TARGET_BIG_NAME "elf32-powerpc-freebsd" 10844 10845#undef ELF_OSABI 10846#define ELF_OSABI ELFOSABI_FREEBSD 10847 10848#undef elf32_bed 10849#define elf32_bed elf32_powerpc_fbsd_bed 10850 10851#include "elf32-target.h" 10852 10853/* VxWorks Target */ 10854 10855#undef TARGET_LITTLE_SYM 10856#undef TARGET_LITTLE_NAME 10857 10858#undef TARGET_BIG_SYM 10859#define TARGET_BIG_SYM powerpc_elf32_vxworks_vec 10860#undef TARGET_BIG_NAME 10861#define TARGET_BIG_NAME "elf32-powerpc-vxworks" 10862 10863#undef ELF_OSABI 10864 10865/* VxWorks uses the elf default section flags for .plt. */ 10866static const struct bfd_elf_special_section * 10867ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 10868{ 10869 if (sec->name == NULL) 10870 return NULL; 10871 10872 if (strcmp (sec->name, ".plt") == 0) 10873 return _bfd_elf_get_sec_type_attr (abfd, sec); 10874 10875 return ppc_elf_get_sec_type_attr (abfd, sec); 10876} 10877 10878/* Like ppc_elf_link_hash_table_create, but overrides 10879 appropriately for VxWorks. */ 10880static struct bfd_link_hash_table * 10881ppc_elf_vxworks_link_hash_table_create (bfd *abfd) 10882{ 10883 struct bfd_link_hash_table *ret; 10884 10885 ret = ppc_elf_link_hash_table_create (abfd); 10886 if (ret) 10887 { 10888 struct ppc_elf_link_hash_table *htab 10889 = (struct ppc_elf_link_hash_table *)ret; 10890 htab->is_vxworks = 1; 10891 htab->plt_type = PLT_VXWORKS; 10892 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; 10893 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; 10894 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; 10895 } 10896 return ret; 10897} 10898 10899/* Tweak magic VxWorks symbols as they are loaded. */ 10900static bfd_boolean 10901ppc_elf_vxworks_add_symbol_hook (bfd *abfd, 10902 struct bfd_link_info *info, 10903 Elf_Internal_Sym *sym, 10904 const char **namep ATTRIBUTE_UNUSED, 10905 flagword *flagsp ATTRIBUTE_UNUSED, 10906 asection **secp, 10907 bfd_vma *valp) 10908{ 10909 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, 10910 valp)) 10911 return FALSE; 10912 10913 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp); 10914} 10915 10916static void 10917ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 10918{ 10919 ppc_elf_final_write_processing(abfd, linker); 10920 elf_vxworks_final_write_processing(abfd, linker); 10921} 10922 10923/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so 10924 define it. */ 10925#undef elf_backend_want_plt_sym 10926#define elf_backend_want_plt_sym 1 10927#undef elf_backend_want_got_plt 10928#define elf_backend_want_got_plt 1 10929#undef elf_backend_got_symbol_offset 10930#define elf_backend_got_symbol_offset 0 10931#undef elf_backend_plt_not_loaded 10932#define elf_backend_plt_not_loaded 0 10933#undef elf_backend_plt_readonly 10934#define elf_backend_plt_readonly 1 10935#undef elf_backend_got_header_size 10936#define elf_backend_got_header_size 12 10937 10938#undef bfd_elf32_get_synthetic_symtab 10939 10940#undef bfd_elf32_bfd_link_hash_table_create 10941#define bfd_elf32_bfd_link_hash_table_create \ 10942 ppc_elf_vxworks_link_hash_table_create 10943#undef elf_backend_add_symbol_hook 10944#define elf_backend_add_symbol_hook \ 10945 ppc_elf_vxworks_add_symbol_hook 10946#undef elf_backend_link_output_symbol_hook 10947#define elf_backend_link_output_symbol_hook \ 10948 elf_vxworks_link_output_symbol_hook 10949#undef elf_backend_final_write_processing 10950#define elf_backend_final_write_processing \ 10951 ppc_elf_vxworks_final_write_processing 10952#undef elf_backend_get_sec_type_attr 10953#define elf_backend_get_sec_type_attr \ 10954 ppc_elf_vxworks_get_sec_type_attr 10955#undef elf_backend_emit_relocs 10956#define elf_backend_emit_relocs \ 10957 elf_vxworks_emit_relocs 10958 10959#undef elf32_bed 10960#define elf32_bed ppc_elf_vxworks_bed 10961#undef elf_backend_post_process_headers 10962 10963#include "elf32-target.h" 10964