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