elf32-ppc.c revision 1.6
1 /* PowerPC-specific support for 32-bit ELF 2 Copyright (C) 1994-2016 Free Software Foundation, Inc. 3 Written by Ian Lance Taylor, Cygnus Support. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the 19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 20 Boston, MA 02110-1301, USA. */ 21 22 23 /* This file is based on a preliminary PowerPC ELF ABI. The 24 information may not match the final PowerPC ELF ABI. It includes 25 suggestions from the in-progress Embedded PowerPC ABI, and that 26 information may also not match. */ 27 28 #include "sysdep.h" 29 #include <stdarg.h> 30 #include "bfd.h" 31 #include "bfdlink.h" 32 #include "libbfd.h" 33 #include "elf-bfd.h" 34 #include "elf/ppc.h" 35 #include "elf32-ppc.h" 36 #include "elf-vxworks.h" 37 #include "dwarf2.h" 38 39 typedef enum split16_format_type 40 { 41 split16a_type = 0, 42 split16d_type 43 } 44 split16_format_type; 45 46 /* RELA relocations are used here. */ 47 48 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc 49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 50 static bfd_reloc_status_type ppc_elf_unhandled_reloc 51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 52 53 /* Branch prediction bit for branch taken relocs. */ 54 #define BRANCH_PREDICT_BIT 0x200000 55 /* Mask to set RA in memory instructions. */ 56 #define RA_REGISTER_MASK 0x001f0000 57 /* Value to shift register by to insert RA. */ 58 #define RA_REGISTER_SHIFT 16 59 60 /* The name of the dynamic interpreter. This is put in the .interp 61 section. */ 62 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 63 64 /* For old-style PLT. */ 65 /* The number of single-slot PLT entries (the rest use two slots). */ 66 #define PLT_NUM_SINGLE_ENTRIES 8192 67 68 /* For new-style .glink and .plt. */ 69 #define GLINK_PLTRESOLVE 16*4 70 #define GLINK_ENTRY_SIZE 4*4 71 #define TLS_GET_ADDR_GLINK_SIZE 12*4 72 73 /* VxWorks uses its own plt layout, filled in by the static linker. */ 74 75 /* The standard VxWorks PLT entry. */ 76 #define VXWORKS_PLT_ENTRY_SIZE 32 77 static const bfd_vma ppc_elf_vxworks_plt_entry 78 [VXWORKS_PLT_ENTRY_SIZE / 4] = 79 { 80 0x3d800000, /* lis r12,0 */ 81 0x818c0000, /* lwz r12,0(r12) */ 82 0x7d8903a6, /* mtctr r12 */ 83 0x4e800420, /* bctr */ 84 0x39600000, /* li r11,0 */ 85 0x48000000, /* b 14 <.PLT0resolve+0x4> */ 86 0x60000000, /* nop */ 87 0x60000000, /* nop */ 88 }; 89 static const bfd_vma ppc_elf_vxworks_pic_plt_entry 90 [VXWORKS_PLT_ENTRY_SIZE / 4] = 91 { 92 0x3d9e0000, /* addis r12,r30,0 */ 93 0x818c0000, /* lwz r12,0(r12) */ 94 0x7d8903a6, /* mtctr r12 */ 95 0x4e800420, /* bctr */ 96 0x39600000, /* li r11,0 */ 97 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ 98 0x60000000, /* nop */ 99 0x60000000, /* nop */ 100 }; 101 102 /* The initial VxWorks PLT entry. */ 103 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 104 static const bfd_vma ppc_elf_vxworks_plt0_entry 105 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 106 { 107 0x3d800000, /* lis r12,0 */ 108 0x398c0000, /* addi r12,r12,0 */ 109 0x800c0008, /* lwz r0,8(r12) */ 110 0x7c0903a6, /* mtctr r0 */ 111 0x818c0004, /* lwz r12,4(r12) */ 112 0x4e800420, /* bctr */ 113 0x60000000, /* nop */ 114 0x60000000, /* nop */ 115 }; 116 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry 117 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 118 { 119 0x819e0008, /* lwz r12,8(r30) */ 120 0x7d8903a6, /* mtctr r12 */ 121 0x819e0004, /* lwz r12,4(r30) */ 122 0x4e800420, /* bctr */ 123 0x60000000, /* nop */ 124 0x60000000, /* nop */ 125 0x60000000, /* nop */ 126 0x60000000, /* nop */ 127 }; 128 129 /* For executables, we have some additional relocations in 130 .rela.plt.unloaded, for the kernel loader. */ 131 132 /* The number of non-JMP_SLOT relocations per PLT0 slot. */ 133 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 134 /* The number of relocations in the PLTResolve slot. */ 135 #define VXWORKS_PLTRESOLVE_RELOCS 2 136 /* The number of relocations in the PLTResolve slot when when creating 137 a shared library. */ 138 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 139 140 /* Some instructions. */ 141 #define ADDIS_11_11 0x3d6b0000 142 #define ADDIS_11_30 0x3d7e0000 143 #define ADDIS_12_12 0x3d8c0000 144 #define ADDI_11_11 0x396b0000 145 #define ADD_0_11_11 0x7c0b5a14 146 #define ADD_3_12_2 0x7c6c1214 147 #define ADD_11_0_11 0x7d605a14 148 #define B 0x48000000 149 #define BA 0x48000002 150 #define BCL_20_31 0x429f0005 151 #define BCTR 0x4e800420 152 #define BEQLR 0x4d820020 153 #define CMPWI_11_0 0x2c0b0000 154 #define LIS_11 0x3d600000 155 #define LIS_12 0x3d800000 156 #define LWZU_0_12 0x840c0000 157 #define LWZ_0_12 0x800c0000 158 #define LWZ_11_3 0x81630000 159 #define LWZ_11_11 0x816b0000 160 #define LWZ_11_30 0x817e0000 161 #define LWZ_12_3 0x81830000 162 #define LWZ_12_12 0x818c0000 163 #define MR_0_3 0x7c601b78 164 #define MR_3_0 0x7c030378 165 #define MFLR_0 0x7c0802a6 166 #define MFLR_12 0x7d8802a6 167 #define MTCTR_0 0x7c0903a6 168 #define MTCTR_11 0x7d6903a6 169 #define MTLR_0 0x7c0803a6 170 #define NOP 0x60000000 171 #define SUB_11_11_12 0x7d6c5850 172 173 /* Offset of tp and dtp pointers from start of TLS block. */ 174 #define TP_OFFSET 0x7000 175 #define DTP_OFFSET 0x8000 176 177 /* The value of a defined global symbol. */ 178 #define SYM_VAL(SYM) \ 179 ((SYM)->root.u.def.section->output_section->vma \ 180 + (SYM)->root.u.def.section->output_offset \ 181 + (SYM)->root.u.def.value) 182 183 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; 185 186 static reloc_howto_type ppc_elf_howto_raw[] = { 187 /* This reloc does nothing. */ 188 HOWTO (R_PPC_NONE, /* type */ 189 0, /* rightshift */ 190 3, /* size (0 = byte, 1 = short, 2 = long) */ 191 0, /* bitsize */ 192 FALSE, /* pc_relative */ 193 0, /* bitpos */ 194 complain_overflow_dont, /* complain_on_overflow */ 195 bfd_elf_generic_reloc, /* special_function */ 196 "R_PPC_NONE", /* name */ 197 FALSE, /* partial_inplace */ 198 0, /* src_mask */ 199 0, /* dst_mask */ 200 FALSE), /* pcrel_offset */ 201 202 /* A standard 32 bit relocation. */ 203 HOWTO (R_PPC_ADDR32, /* type */ 204 0, /* rightshift */ 205 2, /* size (0 = byte, 1 = short, 2 = long) */ 206 32, /* bitsize */ 207 FALSE, /* pc_relative */ 208 0, /* bitpos */ 209 complain_overflow_dont, /* complain_on_overflow */ 210 bfd_elf_generic_reloc, /* special_function */ 211 "R_PPC_ADDR32", /* name */ 212 FALSE, /* partial_inplace */ 213 0, /* src_mask */ 214 0xffffffff, /* dst_mask */ 215 FALSE), /* pcrel_offset */ 216 217 /* An absolute 26 bit branch; the lower two bits must be zero. 218 FIXME: we don't check that, we just clear them. */ 219 HOWTO (R_PPC_ADDR24, /* type */ 220 0, /* rightshift */ 221 2, /* size (0 = byte, 1 = short, 2 = long) */ 222 26, /* bitsize */ 223 FALSE, /* pc_relative */ 224 0, /* bitpos */ 225 complain_overflow_signed, /* complain_on_overflow */ 226 bfd_elf_generic_reloc, /* special_function */ 227 "R_PPC_ADDR24", /* name */ 228 FALSE, /* partial_inplace */ 229 0, /* src_mask */ 230 0x3fffffc, /* dst_mask */ 231 FALSE), /* pcrel_offset */ 232 233 /* A standard 16 bit relocation. */ 234 HOWTO (R_PPC_ADDR16, /* type */ 235 0, /* rightshift */ 236 1, /* size (0 = byte, 1 = short, 2 = long) */ 237 16, /* bitsize */ 238 FALSE, /* pc_relative */ 239 0, /* bitpos */ 240 complain_overflow_bitfield, /* complain_on_overflow */ 241 bfd_elf_generic_reloc, /* special_function */ 242 "R_PPC_ADDR16", /* name */ 243 FALSE, /* partial_inplace */ 244 0, /* src_mask */ 245 0xffff, /* dst_mask */ 246 FALSE), /* pcrel_offset */ 247 248 /* A 16 bit relocation without overflow. */ 249 HOWTO (R_PPC_ADDR16_LO, /* type */ 250 0, /* rightshift */ 251 1, /* size (0 = byte, 1 = short, 2 = long) */ 252 16, /* bitsize */ 253 FALSE, /* pc_relative */ 254 0, /* bitpos */ 255 complain_overflow_dont,/* complain_on_overflow */ 256 bfd_elf_generic_reloc, /* special_function */ 257 "R_PPC_ADDR16_LO", /* name */ 258 FALSE, /* partial_inplace */ 259 0, /* src_mask */ 260 0xffff, /* dst_mask */ 261 FALSE), /* pcrel_offset */ 262 263 /* The high order 16 bits of an address. */ 264 HOWTO (R_PPC_ADDR16_HI, /* type */ 265 16, /* rightshift */ 266 1, /* size (0 = byte, 1 = short, 2 = long) */ 267 16, /* bitsize */ 268 FALSE, /* pc_relative */ 269 0, /* bitpos */ 270 complain_overflow_dont, /* complain_on_overflow */ 271 bfd_elf_generic_reloc, /* special_function */ 272 "R_PPC_ADDR16_HI", /* name */ 273 FALSE, /* partial_inplace */ 274 0, /* src_mask */ 275 0xffff, /* dst_mask */ 276 FALSE), /* pcrel_offset */ 277 278 /* The high order 16 bits of an address, plus 1 if the contents of 279 the low 16 bits, treated as a signed number, is negative. */ 280 HOWTO (R_PPC_ADDR16_HA, /* type */ 281 16, /* rightshift */ 282 1, /* size (0 = byte, 1 = short, 2 = long) */ 283 16, /* bitsize */ 284 FALSE, /* pc_relative */ 285 0, /* bitpos */ 286 complain_overflow_dont, /* complain_on_overflow */ 287 ppc_elf_addr16_ha_reloc, /* special_function */ 288 "R_PPC_ADDR16_HA", /* name */ 289 FALSE, /* partial_inplace */ 290 0, /* src_mask */ 291 0xffff, /* dst_mask */ 292 FALSE), /* pcrel_offset */ 293 294 /* An absolute 16 bit branch; the lower two bits must be zero. 295 FIXME: we don't check that, we just clear them. */ 296 HOWTO (R_PPC_ADDR14, /* type */ 297 0, /* rightshift */ 298 2, /* size (0 = byte, 1 = short, 2 = long) */ 299 16, /* bitsize */ 300 FALSE, /* pc_relative */ 301 0, /* bitpos */ 302 complain_overflow_signed, /* complain_on_overflow */ 303 bfd_elf_generic_reloc, /* special_function */ 304 "R_PPC_ADDR14", /* name */ 305 FALSE, /* partial_inplace */ 306 0, /* src_mask */ 307 0xfffc, /* dst_mask */ 308 FALSE), /* pcrel_offset */ 309 310 /* An absolute 16 bit branch, for which bit 10 should be set to 311 indicate that the branch is expected to be taken. The lower two 312 bits must be zero. */ 313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ 314 0, /* rightshift */ 315 2, /* size (0 = byte, 1 = short, 2 = long) */ 316 16, /* bitsize */ 317 FALSE, /* pc_relative */ 318 0, /* bitpos */ 319 complain_overflow_signed, /* complain_on_overflow */ 320 bfd_elf_generic_reloc, /* special_function */ 321 "R_PPC_ADDR14_BRTAKEN",/* name */ 322 FALSE, /* partial_inplace */ 323 0, /* src_mask */ 324 0xfffc, /* dst_mask */ 325 FALSE), /* pcrel_offset */ 326 327 /* An absolute 16 bit branch, for which bit 10 should be set to 328 indicate that the branch is not expected to be taken. The lower 329 two bits must be zero. */ 330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ 331 0, /* rightshift */ 332 2, /* size (0 = byte, 1 = short, 2 = long) */ 333 16, /* bitsize */ 334 FALSE, /* pc_relative */ 335 0, /* bitpos */ 336 complain_overflow_signed, /* complain_on_overflow */ 337 bfd_elf_generic_reloc, /* special_function */ 338 "R_PPC_ADDR14_BRNTAKEN",/* name */ 339 FALSE, /* partial_inplace */ 340 0, /* src_mask */ 341 0xfffc, /* dst_mask */ 342 FALSE), /* pcrel_offset */ 343 344 /* A relative 26 bit branch; the lower two bits must be zero. */ 345 HOWTO (R_PPC_REL24, /* type */ 346 0, /* rightshift */ 347 2, /* size (0 = byte, 1 = short, 2 = long) */ 348 26, /* bitsize */ 349 TRUE, /* pc_relative */ 350 0, /* bitpos */ 351 complain_overflow_signed, /* complain_on_overflow */ 352 bfd_elf_generic_reloc, /* special_function */ 353 "R_PPC_REL24", /* name */ 354 FALSE, /* partial_inplace */ 355 0, /* src_mask */ 356 0x3fffffc, /* dst_mask */ 357 TRUE), /* pcrel_offset */ 358 359 /* A relative 16 bit branch; the lower two bits must be zero. */ 360 HOWTO (R_PPC_REL14, /* type */ 361 0, /* rightshift */ 362 2, /* size (0 = byte, 1 = short, 2 = long) */ 363 16, /* bitsize */ 364 TRUE, /* pc_relative */ 365 0, /* bitpos */ 366 complain_overflow_signed, /* complain_on_overflow */ 367 bfd_elf_generic_reloc, /* special_function */ 368 "R_PPC_REL14", /* name */ 369 FALSE, /* partial_inplace */ 370 0, /* src_mask */ 371 0xfffc, /* dst_mask */ 372 TRUE), /* pcrel_offset */ 373 374 /* A relative 16 bit branch. Bit 10 should be set to indicate that 375 the branch is expected to be taken. The lower two bits must be 376 zero. */ 377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */ 378 0, /* rightshift */ 379 2, /* size (0 = byte, 1 = short, 2 = long) */ 380 16, /* bitsize */ 381 TRUE, /* pc_relative */ 382 0, /* bitpos */ 383 complain_overflow_signed, /* complain_on_overflow */ 384 bfd_elf_generic_reloc, /* special_function */ 385 "R_PPC_REL14_BRTAKEN", /* name */ 386 FALSE, /* partial_inplace */ 387 0, /* src_mask */ 388 0xfffc, /* dst_mask */ 389 TRUE), /* pcrel_offset */ 390 391 /* A relative 16 bit branch. Bit 10 should be set to indicate that 392 the branch is not expected to be taken. The lower two bits must 393 be zero. */ 394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ 395 0, /* rightshift */ 396 2, /* size (0 = byte, 1 = short, 2 = long) */ 397 16, /* bitsize */ 398 TRUE, /* pc_relative */ 399 0, /* bitpos */ 400 complain_overflow_signed, /* complain_on_overflow */ 401 bfd_elf_generic_reloc, /* special_function */ 402 "R_PPC_REL14_BRNTAKEN",/* name */ 403 FALSE, /* partial_inplace */ 404 0, /* src_mask */ 405 0xfffc, /* dst_mask */ 406 TRUE), /* pcrel_offset */ 407 408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the 409 symbol. */ 410 HOWTO (R_PPC_GOT16, /* type */ 411 0, /* rightshift */ 412 1, /* size (0 = byte, 1 = short, 2 = long) */ 413 16, /* bitsize */ 414 FALSE, /* pc_relative */ 415 0, /* bitpos */ 416 complain_overflow_signed, /* complain_on_overflow */ 417 ppc_elf_unhandled_reloc, /* special_function */ 418 "R_PPC_GOT16", /* name */ 419 FALSE, /* partial_inplace */ 420 0, /* src_mask */ 421 0xffff, /* dst_mask */ 422 FALSE), /* pcrel_offset */ 423 424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for 425 the symbol. */ 426 HOWTO (R_PPC_GOT16_LO, /* type */ 427 0, /* rightshift */ 428 1, /* size (0 = byte, 1 = short, 2 = long) */ 429 16, /* bitsize */ 430 FALSE, /* pc_relative */ 431 0, /* bitpos */ 432 complain_overflow_dont, /* complain_on_overflow */ 433 ppc_elf_unhandled_reloc, /* special_function */ 434 "R_PPC_GOT16_LO", /* name */ 435 FALSE, /* partial_inplace */ 436 0, /* src_mask */ 437 0xffff, /* dst_mask */ 438 FALSE), /* pcrel_offset */ 439 440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for 441 the symbol. */ 442 HOWTO (R_PPC_GOT16_HI, /* type */ 443 16, /* rightshift */ 444 1, /* size (0 = byte, 1 = short, 2 = long) */ 445 16, /* bitsize */ 446 FALSE, /* pc_relative */ 447 0, /* bitpos */ 448 complain_overflow_dont, /* complain_on_overflow */ 449 ppc_elf_unhandled_reloc, /* special_function */ 450 "R_PPC_GOT16_HI", /* name */ 451 FALSE, /* partial_inplace */ 452 0, /* src_mask */ 453 0xffff, /* dst_mask */ 454 FALSE), /* pcrel_offset */ 455 456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for 457 the symbol. */ 458 HOWTO (R_PPC_GOT16_HA, /* type */ 459 16, /* rightshift */ 460 1, /* size (0 = byte, 1 = short, 2 = long) */ 461 16, /* bitsize */ 462 FALSE, /* pc_relative */ 463 0, /* bitpos */ 464 complain_overflow_dont, /* complain_on_overflow */ 465 ppc_elf_unhandled_reloc, /* special_function */ 466 "R_PPC_GOT16_HA", /* name */ 467 FALSE, /* partial_inplace */ 468 0, /* src_mask */ 469 0xffff, /* dst_mask */ 470 FALSE), /* pcrel_offset */ 471 472 /* Like R_PPC_REL24, but referring to the procedure linkage table 473 entry for the symbol. */ 474 HOWTO (R_PPC_PLTREL24, /* type */ 475 0, /* rightshift */ 476 2, /* size (0 = byte, 1 = short, 2 = long) */ 477 26, /* bitsize */ 478 TRUE, /* pc_relative */ 479 0, /* bitpos */ 480 complain_overflow_signed, /* complain_on_overflow */ 481 ppc_elf_unhandled_reloc, /* special_function */ 482 "R_PPC_PLTREL24", /* name */ 483 FALSE, /* partial_inplace */ 484 0, /* src_mask */ 485 0x3fffffc, /* dst_mask */ 486 TRUE), /* pcrel_offset */ 487 488 /* This is used only by the dynamic linker. The symbol should exist 489 both in the object being run and in some shared library. The 490 dynamic linker copies the data addressed by the symbol from the 491 shared library into the object, because the object being 492 run has to have the data at some particular address. */ 493 HOWTO (R_PPC_COPY, /* type */ 494 0, /* rightshift */ 495 2, /* size (0 = byte, 1 = short, 2 = long) */ 496 32, /* bitsize */ 497 FALSE, /* pc_relative */ 498 0, /* bitpos */ 499 complain_overflow_dont, /* complain_on_overflow */ 500 ppc_elf_unhandled_reloc, /* special_function */ 501 "R_PPC_COPY", /* name */ 502 FALSE, /* partial_inplace */ 503 0, /* src_mask */ 504 0, /* dst_mask */ 505 FALSE), /* pcrel_offset */ 506 507 /* Like R_PPC_ADDR32, but used when setting global offset table 508 entries. */ 509 HOWTO (R_PPC_GLOB_DAT, /* type */ 510 0, /* rightshift */ 511 2, /* size (0 = byte, 1 = short, 2 = long) */ 512 32, /* bitsize */ 513 FALSE, /* pc_relative */ 514 0, /* bitpos */ 515 complain_overflow_dont, /* complain_on_overflow */ 516 ppc_elf_unhandled_reloc, /* special_function */ 517 "R_PPC_GLOB_DAT", /* name */ 518 FALSE, /* partial_inplace */ 519 0, /* src_mask */ 520 0xffffffff, /* dst_mask */ 521 FALSE), /* pcrel_offset */ 522 523 /* Marks a procedure linkage table entry for a symbol. */ 524 HOWTO (R_PPC_JMP_SLOT, /* type */ 525 0, /* rightshift */ 526 2, /* size (0 = byte, 1 = short, 2 = long) */ 527 32, /* bitsize */ 528 FALSE, /* pc_relative */ 529 0, /* bitpos */ 530 complain_overflow_dont, /* complain_on_overflow */ 531 ppc_elf_unhandled_reloc, /* special_function */ 532 "R_PPC_JMP_SLOT", /* name */ 533 FALSE, /* partial_inplace */ 534 0, /* src_mask */ 535 0, /* dst_mask */ 536 FALSE), /* pcrel_offset */ 537 538 /* Used only by the dynamic linker. When the object is run, this 539 longword is set to the load address of the object, plus the 540 addend. */ 541 HOWTO (R_PPC_RELATIVE, /* type */ 542 0, /* rightshift */ 543 2, /* size (0 = byte, 1 = short, 2 = long) */ 544 32, /* bitsize */ 545 FALSE, /* pc_relative */ 546 0, /* bitpos */ 547 complain_overflow_dont, /* complain_on_overflow */ 548 bfd_elf_generic_reloc, /* special_function */ 549 "R_PPC_RELATIVE", /* name */ 550 FALSE, /* partial_inplace */ 551 0, /* src_mask */ 552 0xffffffff, /* dst_mask */ 553 FALSE), /* pcrel_offset */ 554 555 /* Like R_PPC_REL24, but uses the value of the symbol within the 556 object rather than the final value. Normally used for 557 _GLOBAL_OFFSET_TABLE_. */ 558 HOWTO (R_PPC_LOCAL24PC, /* type */ 559 0, /* rightshift */ 560 2, /* size (0 = byte, 1 = short, 2 = long) */ 561 26, /* bitsize */ 562 TRUE, /* pc_relative */ 563 0, /* bitpos */ 564 complain_overflow_signed, /* complain_on_overflow */ 565 bfd_elf_generic_reloc, /* special_function */ 566 "R_PPC_LOCAL24PC", /* name */ 567 FALSE, /* partial_inplace */ 568 0, /* src_mask */ 569 0x3fffffc, /* dst_mask */ 570 TRUE), /* pcrel_offset */ 571 572 /* Like R_PPC_ADDR32, but may be unaligned. */ 573 HOWTO (R_PPC_UADDR32, /* type */ 574 0, /* rightshift */ 575 2, /* size (0 = byte, 1 = short, 2 = long) */ 576 32, /* bitsize */ 577 FALSE, /* pc_relative */ 578 0, /* bitpos */ 579 complain_overflow_dont, /* complain_on_overflow */ 580 bfd_elf_generic_reloc, /* special_function */ 581 "R_PPC_UADDR32", /* name */ 582 FALSE, /* partial_inplace */ 583 0, /* src_mask */ 584 0xffffffff, /* dst_mask */ 585 FALSE), /* pcrel_offset */ 586 587 /* Like R_PPC_ADDR16, but may be unaligned. */ 588 HOWTO (R_PPC_UADDR16, /* type */ 589 0, /* rightshift */ 590 1, /* size (0 = byte, 1 = short, 2 = long) */ 591 16, /* bitsize */ 592 FALSE, /* pc_relative */ 593 0, /* bitpos */ 594 complain_overflow_bitfield, /* complain_on_overflow */ 595 bfd_elf_generic_reloc, /* special_function */ 596 "R_PPC_UADDR16", /* name */ 597 FALSE, /* partial_inplace */ 598 0, /* src_mask */ 599 0xffff, /* dst_mask */ 600 FALSE), /* pcrel_offset */ 601 602 /* 32-bit PC relative */ 603 HOWTO (R_PPC_REL32, /* type */ 604 0, /* rightshift */ 605 2, /* size (0 = byte, 1 = short, 2 = long) */ 606 32, /* bitsize */ 607 TRUE, /* pc_relative */ 608 0, /* bitpos */ 609 complain_overflow_dont, /* complain_on_overflow */ 610 bfd_elf_generic_reloc, /* special_function */ 611 "R_PPC_REL32", /* name */ 612 FALSE, /* partial_inplace */ 613 0, /* src_mask */ 614 0xffffffff, /* dst_mask */ 615 TRUE), /* pcrel_offset */ 616 617 /* 32-bit relocation to the symbol's procedure linkage table. 618 FIXME: not supported. */ 619 HOWTO (R_PPC_PLT32, /* type */ 620 0, /* rightshift */ 621 2, /* size (0 = byte, 1 = short, 2 = long) */ 622 32, /* bitsize */ 623 FALSE, /* pc_relative */ 624 0, /* bitpos */ 625 complain_overflow_dont, /* complain_on_overflow */ 626 ppc_elf_unhandled_reloc, /* special_function */ 627 "R_PPC_PLT32", /* name */ 628 FALSE, /* partial_inplace */ 629 0, /* src_mask */ 630 0, /* dst_mask */ 631 FALSE), /* pcrel_offset */ 632 633 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 634 FIXME: not supported. */ 635 HOWTO (R_PPC_PLTREL32, /* type */ 636 0, /* rightshift */ 637 2, /* size (0 = byte, 1 = short, 2 = long) */ 638 32, /* bitsize */ 639 TRUE, /* pc_relative */ 640 0, /* bitpos */ 641 complain_overflow_dont, /* complain_on_overflow */ 642 ppc_elf_unhandled_reloc, /* special_function */ 643 "R_PPC_PLTREL32", /* name */ 644 FALSE, /* partial_inplace */ 645 0, /* src_mask */ 646 0, /* dst_mask */ 647 TRUE), /* pcrel_offset */ 648 649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for 650 the symbol. */ 651 HOWTO (R_PPC_PLT16_LO, /* type */ 652 0, /* rightshift */ 653 1, /* size (0 = byte, 1 = short, 2 = long) */ 654 16, /* bitsize */ 655 FALSE, /* pc_relative */ 656 0, /* bitpos */ 657 complain_overflow_dont, /* complain_on_overflow */ 658 ppc_elf_unhandled_reloc, /* special_function */ 659 "R_PPC_PLT16_LO", /* name */ 660 FALSE, /* partial_inplace */ 661 0, /* src_mask */ 662 0xffff, /* dst_mask */ 663 FALSE), /* pcrel_offset */ 664 665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for 666 the symbol. */ 667 HOWTO (R_PPC_PLT16_HI, /* type */ 668 16, /* rightshift */ 669 1, /* size (0 = byte, 1 = short, 2 = long) */ 670 16, /* bitsize */ 671 FALSE, /* pc_relative */ 672 0, /* bitpos */ 673 complain_overflow_dont, /* complain_on_overflow */ 674 ppc_elf_unhandled_reloc, /* special_function */ 675 "R_PPC_PLT16_HI", /* name */ 676 FALSE, /* partial_inplace */ 677 0, /* src_mask */ 678 0xffff, /* dst_mask */ 679 FALSE), /* pcrel_offset */ 680 681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for 682 the symbol. */ 683 HOWTO (R_PPC_PLT16_HA, /* type */ 684 16, /* rightshift */ 685 1, /* size (0 = byte, 1 = short, 2 = long) */ 686 16, /* bitsize */ 687 FALSE, /* pc_relative */ 688 0, /* bitpos */ 689 complain_overflow_dont, /* complain_on_overflow */ 690 ppc_elf_unhandled_reloc, /* special_function */ 691 "R_PPC_PLT16_HA", /* name */ 692 FALSE, /* partial_inplace */ 693 0, /* src_mask */ 694 0xffff, /* dst_mask */ 695 FALSE), /* pcrel_offset */ 696 697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with 698 small data items. */ 699 HOWTO (R_PPC_SDAREL16, /* type */ 700 0, /* rightshift */ 701 1, /* size (0 = byte, 1 = short, 2 = long) */ 702 16, /* bitsize */ 703 FALSE, /* pc_relative */ 704 0, /* bitpos */ 705 complain_overflow_signed, /* complain_on_overflow */ 706 ppc_elf_unhandled_reloc, /* special_function */ 707 "R_PPC_SDAREL16", /* name */ 708 FALSE, /* partial_inplace */ 709 0, /* src_mask */ 710 0xffff, /* dst_mask */ 711 FALSE), /* pcrel_offset */ 712 713 /* 16-bit section relative relocation. */ 714 HOWTO (R_PPC_SECTOFF, /* type */ 715 0, /* rightshift */ 716 1, /* size (0 = byte, 1 = short, 2 = long) */ 717 16, /* bitsize */ 718 FALSE, /* pc_relative */ 719 0, /* bitpos */ 720 complain_overflow_signed, /* complain_on_overflow */ 721 ppc_elf_unhandled_reloc, /* special_function */ 722 "R_PPC_SECTOFF", /* name */ 723 FALSE, /* partial_inplace */ 724 0, /* src_mask */ 725 0xffff, /* dst_mask */ 726 FALSE), /* pcrel_offset */ 727 728 /* 16-bit lower half section relative relocation. */ 729 HOWTO (R_PPC_SECTOFF_LO, /* type */ 730 0, /* rightshift */ 731 1, /* size (0 = byte, 1 = short, 2 = long) */ 732 16, /* bitsize */ 733 FALSE, /* pc_relative */ 734 0, /* bitpos */ 735 complain_overflow_dont, /* complain_on_overflow */ 736 ppc_elf_unhandled_reloc, /* special_function */ 737 "R_PPC_SECTOFF_LO", /* name */ 738 FALSE, /* partial_inplace */ 739 0, /* src_mask */ 740 0xffff, /* dst_mask */ 741 FALSE), /* pcrel_offset */ 742 743 /* 16-bit upper half section relative relocation. */ 744 HOWTO (R_PPC_SECTOFF_HI, /* type */ 745 16, /* rightshift */ 746 1, /* size (0 = byte, 1 = short, 2 = long) */ 747 16, /* bitsize */ 748 FALSE, /* pc_relative */ 749 0, /* bitpos */ 750 complain_overflow_dont, /* complain_on_overflow */ 751 ppc_elf_unhandled_reloc, /* special_function */ 752 "R_PPC_SECTOFF_HI", /* name */ 753 FALSE, /* partial_inplace */ 754 0, /* src_mask */ 755 0xffff, /* dst_mask */ 756 FALSE), /* pcrel_offset */ 757 758 /* 16-bit upper half adjusted section relative relocation. */ 759 HOWTO (R_PPC_SECTOFF_HA, /* type */ 760 16, /* rightshift */ 761 1, /* size (0 = byte, 1 = short, 2 = long) */ 762 16, /* bitsize */ 763 FALSE, /* pc_relative */ 764 0, /* bitpos */ 765 complain_overflow_dont, /* complain_on_overflow */ 766 ppc_elf_unhandled_reloc, /* special_function */ 767 "R_PPC_SECTOFF_HA", /* name */ 768 FALSE, /* partial_inplace */ 769 0, /* src_mask */ 770 0xffff, /* dst_mask */ 771 FALSE), /* pcrel_offset */ 772 773 /* Marker relocs for TLS. */ 774 HOWTO (R_PPC_TLS, 775 0, /* rightshift */ 776 2, /* size (0 = byte, 1 = short, 2 = long) */ 777 32, /* bitsize */ 778 FALSE, /* pc_relative */ 779 0, /* bitpos */ 780 complain_overflow_dont, /* complain_on_overflow */ 781 bfd_elf_generic_reloc, /* special_function */ 782 "R_PPC_TLS", /* name */ 783 FALSE, /* partial_inplace */ 784 0, /* src_mask */ 785 0, /* dst_mask */ 786 FALSE), /* pcrel_offset */ 787 788 HOWTO (R_PPC_TLSGD, 789 0, /* rightshift */ 790 2, /* size (0 = byte, 1 = short, 2 = long) */ 791 32, /* bitsize */ 792 FALSE, /* pc_relative */ 793 0, /* bitpos */ 794 complain_overflow_dont, /* complain_on_overflow */ 795 bfd_elf_generic_reloc, /* special_function */ 796 "R_PPC_TLSGD", /* name */ 797 FALSE, /* partial_inplace */ 798 0, /* src_mask */ 799 0, /* dst_mask */ 800 FALSE), /* pcrel_offset */ 801 802 HOWTO (R_PPC_TLSLD, 803 0, /* rightshift */ 804 2, /* size (0 = byte, 1 = short, 2 = long) */ 805 32, /* bitsize */ 806 FALSE, /* pc_relative */ 807 0, /* bitpos */ 808 complain_overflow_dont, /* complain_on_overflow */ 809 bfd_elf_generic_reloc, /* special_function */ 810 "R_PPC_TLSLD", /* name */ 811 FALSE, /* partial_inplace */ 812 0, /* src_mask */ 813 0, /* dst_mask */ 814 FALSE), /* pcrel_offset */ 815 816 /* Computes the load module index of the load module that contains the 817 definition of its TLS sym. */ 818 HOWTO (R_PPC_DTPMOD32, 819 0, /* rightshift */ 820 2, /* size (0 = byte, 1 = short, 2 = long) */ 821 32, /* bitsize */ 822 FALSE, /* pc_relative */ 823 0, /* bitpos */ 824 complain_overflow_dont, /* complain_on_overflow */ 825 ppc_elf_unhandled_reloc, /* special_function */ 826 "R_PPC_DTPMOD32", /* name */ 827 FALSE, /* partial_inplace */ 828 0, /* src_mask */ 829 0xffffffff, /* dst_mask */ 830 FALSE), /* pcrel_offset */ 831 832 /* Computes a dtv-relative displacement, the difference between the value 833 of sym+add and the base address of the thread-local storage block that 834 contains the definition of sym, minus 0x8000. */ 835 HOWTO (R_PPC_DTPREL32, 836 0, /* rightshift */ 837 2, /* size (0 = byte, 1 = short, 2 = long) */ 838 32, /* bitsize */ 839 FALSE, /* pc_relative */ 840 0, /* bitpos */ 841 complain_overflow_dont, /* complain_on_overflow */ 842 ppc_elf_unhandled_reloc, /* special_function */ 843 "R_PPC_DTPREL32", /* name */ 844 FALSE, /* partial_inplace */ 845 0, /* src_mask */ 846 0xffffffff, /* dst_mask */ 847 FALSE), /* pcrel_offset */ 848 849 /* A 16 bit dtprel reloc. */ 850 HOWTO (R_PPC_DTPREL16, 851 0, /* rightshift */ 852 1, /* size (0 = byte, 1 = short, 2 = long) */ 853 16, /* bitsize */ 854 FALSE, /* pc_relative */ 855 0, /* bitpos */ 856 complain_overflow_signed, /* complain_on_overflow */ 857 ppc_elf_unhandled_reloc, /* special_function */ 858 "R_PPC_DTPREL16", /* name */ 859 FALSE, /* partial_inplace */ 860 0, /* src_mask */ 861 0xffff, /* dst_mask */ 862 FALSE), /* pcrel_offset */ 863 864 /* Like DTPREL16, but no overflow. */ 865 HOWTO (R_PPC_DTPREL16_LO, 866 0, /* rightshift */ 867 1, /* size (0 = byte, 1 = short, 2 = long) */ 868 16, /* bitsize */ 869 FALSE, /* pc_relative */ 870 0, /* bitpos */ 871 complain_overflow_dont, /* complain_on_overflow */ 872 ppc_elf_unhandled_reloc, /* special_function */ 873 "R_PPC_DTPREL16_LO", /* name */ 874 FALSE, /* partial_inplace */ 875 0, /* src_mask */ 876 0xffff, /* dst_mask */ 877 FALSE), /* pcrel_offset */ 878 879 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 880 HOWTO (R_PPC_DTPREL16_HI, 881 16, /* rightshift */ 882 1, /* size (0 = byte, 1 = short, 2 = long) */ 883 16, /* bitsize */ 884 FALSE, /* pc_relative */ 885 0, /* bitpos */ 886 complain_overflow_dont, /* complain_on_overflow */ 887 ppc_elf_unhandled_reloc, /* special_function */ 888 "R_PPC_DTPREL16_HI", /* name */ 889 FALSE, /* partial_inplace */ 890 0, /* src_mask */ 891 0xffff, /* dst_mask */ 892 FALSE), /* pcrel_offset */ 893 894 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 895 HOWTO (R_PPC_DTPREL16_HA, 896 16, /* rightshift */ 897 1, /* size (0 = byte, 1 = short, 2 = long) */ 898 16, /* bitsize */ 899 FALSE, /* pc_relative */ 900 0, /* bitpos */ 901 complain_overflow_dont, /* complain_on_overflow */ 902 ppc_elf_unhandled_reloc, /* special_function */ 903 "R_PPC_DTPREL16_HA", /* name */ 904 FALSE, /* partial_inplace */ 905 0, /* src_mask */ 906 0xffff, /* dst_mask */ 907 FALSE), /* pcrel_offset */ 908 909 /* Computes a tp-relative displacement, the difference between the value of 910 sym+add and the value of the thread pointer (r13). */ 911 HOWTO (R_PPC_TPREL32, 912 0, /* rightshift */ 913 2, /* size (0 = byte, 1 = short, 2 = long) */ 914 32, /* bitsize */ 915 FALSE, /* pc_relative */ 916 0, /* bitpos */ 917 complain_overflow_dont, /* complain_on_overflow */ 918 ppc_elf_unhandled_reloc, /* special_function */ 919 "R_PPC_TPREL32", /* name */ 920 FALSE, /* partial_inplace */ 921 0, /* src_mask */ 922 0xffffffff, /* dst_mask */ 923 FALSE), /* pcrel_offset */ 924 925 /* A 16 bit tprel reloc. */ 926 HOWTO (R_PPC_TPREL16, 927 0, /* rightshift */ 928 1, /* size (0 = byte, 1 = short, 2 = long) */ 929 16, /* bitsize */ 930 FALSE, /* pc_relative */ 931 0, /* bitpos */ 932 complain_overflow_signed, /* complain_on_overflow */ 933 ppc_elf_unhandled_reloc, /* special_function */ 934 "R_PPC_TPREL16", /* name */ 935 FALSE, /* partial_inplace */ 936 0, /* src_mask */ 937 0xffff, /* dst_mask */ 938 FALSE), /* pcrel_offset */ 939 940 /* Like TPREL16, but no overflow. */ 941 HOWTO (R_PPC_TPREL16_LO, 942 0, /* rightshift */ 943 1, /* size (0 = byte, 1 = short, 2 = long) */ 944 16, /* bitsize */ 945 FALSE, /* pc_relative */ 946 0, /* bitpos */ 947 complain_overflow_dont, /* complain_on_overflow */ 948 ppc_elf_unhandled_reloc, /* special_function */ 949 "R_PPC_TPREL16_LO", /* name */ 950 FALSE, /* partial_inplace */ 951 0, /* src_mask */ 952 0xffff, /* dst_mask */ 953 FALSE), /* pcrel_offset */ 954 955 /* Like TPREL16_LO, but next higher group of 16 bits. */ 956 HOWTO (R_PPC_TPREL16_HI, 957 16, /* rightshift */ 958 1, /* size (0 = byte, 1 = short, 2 = long) */ 959 16, /* bitsize */ 960 FALSE, /* pc_relative */ 961 0, /* bitpos */ 962 complain_overflow_dont, /* complain_on_overflow */ 963 ppc_elf_unhandled_reloc, /* special_function */ 964 "R_PPC_TPREL16_HI", /* name */ 965 FALSE, /* partial_inplace */ 966 0, /* src_mask */ 967 0xffff, /* dst_mask */ 968 FALSE), /* pcrel_offset */ 969 970 /* Like TPREL16_HI, but adjust for low 16 bits. */ 971 HOWTO (R_PPC_TPREL16_HA, 972 16, /* rightshift */ 973 1, /* size (0 = byte, 1 = short, 2 = long) */ 974 16, /* bitsize */ 975 FALSE, /* pc_relative */ 976 0, /* bitpos */ 977 complain_overflow_dont, /* complain_on_overflow */ 978 ppc_elf_unhandled_reloc, /* special_function */ 979 "R_PPC_TPREL16_HA", /* name */ 980 FALSE, /* partial_inplace */ 981 0, /* src_mask */ 982 0xffff, /* dst_mask */ 983 FALSE), /* pcrel_offset */ 984 985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 987 to the first entry. */ 988 HOWTO (R_PPC_GOT_TLSGD16, 989 0, /* rightshift */ 990 1, /* size (0 = byte, 1 = short, 2 = long) */ 991 16, /* bitsize */ 992 FALSE, /* pc_relative */ 993 0, /* bitpos */ 994 complain_overflow_signed, /* complain_on_overflow */ 995 ppc_elf_unhandled_reloc, /* special_function */ 996 "R_PPC_GOT_TLSGD16", /* name */ 997 FALSE, /* partial_inplace */ 998 0, /* src_mask */ 999 0xffff, /* dst_mask */ 1000 FALSE), /* pcrel_offset */ 1001 1002 /* Like GOT_TLSGD16, but no overflow. */ 1003 HOWTO (R_PPC_GOT_TLSGD16_LO, 1004 0, /* rightshift */ 1005 1, /* size (0 = byte, 1 = short, 2 = long) */ 1006 16, /* bitsize */ 1007 FALSE, /* pc_relative */ 1008 0, /* bitpos */ 1009 complain_overflow_dont, /* complain_on_overflow */ 1010 ppc_elf_unhandled_reloc, /* special_function */ 1011 "R_PPC_GOT_TLSGD16_LO", /* name */ 1012 FALSE, /* partial_inplace */ 1013 0, /* src_mask */ 1014 0xffff, /* dst_mask */ 1015 FALSE), /* pcrel_offset */ 1016 1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 1018 HOWTO (R_PPC_GOT_TLSGD16_HI, 1019 16, /* rightshift */ 1020 1, /* size (0 = byte, 1 = short, 2 = long) */ 1021 16, /* bitsize */ 1022 FALSE, /* pc_relative */ 1023 0, /* bitpos */ 1024 complain_overflow_dont, /* complain_on_overflow */ 1025 ppc_elf_unhandled_reloc, /* special_function */ 1026 "R_PPC_GOT_TLSGD16_HI", /* name */ 1027 FALSE, /* partial_inplace */ 1028 0, /* src_mask */ 1029 0xffff, /* dst_mask */ 1030 FALSE), /* pcrel_offset */ 1031 1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 1033 HOWTO (R_PPC_GOT_TLSGD16_HA, 1034 16, /* rightshift */ 1035 1, /* size (0 = byte, 1 = short, 2 = long) */ 1036 16, /* bitsize */ 1037 FALSE, /* pc_relative */ 1038 0, /* bitpos */ 1039 complain_overflow_dont, /* complain_on_overflow */ 1040 ppc_elf_unhandled_reloc, /* special_function */ 1041 "R_PPC_GOT_TLSGD16_HA", /* name */ 1042 FALSE, /* partial_inplace */ 1043 0, /* src_mask */ 1044 0xffff, /* dst_mask */ 1045 FALSE), /* pcrel_offset */ 1046 1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1048 with values (sym+add)@dtpmod and zero, and computes the offset to the 1049 first entry. */ 1050 HOWTO (R_PPC_GOT_TLSLD16, 1051 0, /* rightshift */ 1052 1, /* size (0 = byte, 1 = short, 2 = long) */ 1053 16, /* bitsize */ 1054 FALSE, /* pc_relative */ 1055 0, /* bitpos */ 1056 complain_overflow_signed, /* complain_on_overflow */ 1057 ppc_elf_unhandled_reloc, /* special_function */ 1058 "R_PPC_GOT_TLSLD16", /* name */ 1059 FALSE, /* partial_inplace */ 1060 0, /* src_mask */ 1061 0xffff, /* dst_mask */ 1062 FALSE), /* pcrel_offset */ 1063 1064 /* Like GOT_TLSLD16, but no overflow. */ 1065 HOWTO (R_PPC_GOT_TLSLD16_LO, 1066 0, /* rightshift */ 1067 1, /* size (0 = byte, 1 = short, 2 = long) */ 1068 16, /* bitsize */ 1069 FALSE, /* pc_relative */ 1070 0, /* bitpos */ 1071 complain_overflow_dont, /* complain_on_overflow */ 1072 ppc_elf_unhandled_reloc, /* special_function */ 1073 "R_PPC_GOT_TLSLD16_LO", /* name */ 1074 FALSE, /* partial_inplace */ 1075 0, /* src_mask */ 1076 0xffff, /* dst_mask */ 1077 FALSE), /* pcrel_offset */ 1078 1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1080 HOWTO (R_PPC_GOT_TLSLD16_HI, 1081 16, /* rightshift */ 1082 1, /* size (0 = byte, 1 = short, 2 = long) */ 1083 16, /* bitsize */ 1084 FALSE, /* pc_relative */ 1085 0, /* bitpos */ 1086 complain_overflow_dont, /* complain_on_overflow */ 1087 ppc_elf_unhandled_reloc, /* special_function */ 1088 "R_PPC_GOT_TLSLD16_HI", /* name */ 1089 FALSE, /* partial_inplace */ 1090 0, /* src_mask */ 1091 0xffff, /* dst_mask */ 1092 FALSE), /* pcrel_offset */ 1093 1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1095 HOWTO (R_PPC_GOT_TLSLD16_HA, 1096 16, /* rightshift */ 1097 1, /* size (0 = byte, 1 = short, 2 = long) */ 1098 16, /* bitsize */ 1099 FALSE, /* pc_relative */ 1100 0, /* bitpos */ 1101 complain_overflow_dont, /* complain_on_overflow */ 1102 ppc_elf_unhandled_reloc, /* special_function */ 1103 "R_PPC_GOT_TLSLD16_HA", /* name */ 1104 FALSE, /* partial_inplace */ 1105 0, /* src_mask */ 1106 0xffff, /* dst_mask */ 1107 FALSE), /* pcrel_offset */ 1108 1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1110 the offset to the entry. */ 1111 HOWTO (R_PPC_GOT_DTPREL16, 1112 0, /* rightshift */ 1113 1, /* size (0 = byte, 1 = short, 2 = long) */ 1114 16, /* bitsize */ 1115 FALSE, /* pc_relative */ 1116 0, /* bitpos */ 1117 complain_overflow_signed, /* complain_on_overflow */ 1118 ppc_elf_unhandled_reloc, /* special_function */ 1119 "R_PPC_GOT_DTPREL16", /* name */ 1120 FALSE, /* partial_inplace */ 1121 0, /* src_mask */ 1122 0xffff, /* dst_mask */ 1123 FALSE), /* pcrel_offset */ 1124 1125 /* Like GOT_DTPREL16, but no overflow. */ 1126 HOWTO (R_PPC_GOT_DTPREL16_LO, 1127 0, /* rightshift */ 1128 1, /* size (0 = byte, 1 = short, 2 = long) */ 1129 16, /* bitsize */ 1130 FALSE, /* pc_relative */ 1131 0, /* bitpos */ 1132 complain_overflow_dont, /* complain_on_overflow */ 1133 ppc_elf_unhandled_reloc, /* special_function */ 1134 "R_PPC_GOT_DTPREL16_LO", /* name */ 1135 FALSE, /* partial_inplace */ 1136 0, /* src_mask */ 1137 0xffff, /* dst_mask */ 1138 FALSE), /* pcrel_offset */ 1139 1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ 1141 HOWTO (R_PPC_GOT_DTPREL16_HI, 1142 16, /* rightshift */ 1143 1, /* size (0 = byte, 1 = short, 2 = long) */ 1144 16, /* bitsize */ 1145 FALSE, /* pc_relative */ 1146 0, /* bitpos */ 1147 complain_overflow_dont, /* complain_on_overflow */ 1148 ppc_elf_unhandled_reloc, /* special_function */ 1149 "R_PPC_GOT_DTPREL16_HI", /* name */ 1150 FALSE, /* partial_inplace */ 1151 0, /* src_mask */ 1152 0xffff, /* dst_mask */ 1153 FALSE), /* pcrel_offset */ 1154 1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1156 HOWTO (R_PPC_GOT_DTPREL16_HA, 1157 16, /* rightshift */ 1158 1, /* size (0 = byte, 1 = short, 2 = long) */ 1159 16, /* bitsize */ 1160 FALSE, /* pc_relative */ 1161 0, /* bitpos */ 1162 complain_overflow_dont, /* complain_on_overflow */ 1163 ppc_elf_unhandled_reloc, /* special_function */ 1164 "R_PPC_GOT_DTPREL16_HA", /* name */ 1165 FALSE, /* partial_inplace */ 1166 0, /* src_mask */ 1167 0xffff, /* dst_mask */ 1168 FALSE), /* pcrel_offset */ 1169 1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1171 offset to the entry. */ 1172 HOWTO (R_PPC_GOT_TPREL16, 1173 0, /* rightshift */ 1174 1, /* size (0 = byte, 1 = short, 2 = long) */ 1175 16, /* bitsize */ 1176 FALSE, /* pc_relative */ 1177 0, /* bitpos */ 1178 complain_overflow_signed, /* complain_on_overflow */ 1179 ppc_elf_unhandled_reloc, /* special_function */ 1180 "R_PPC_GOT_TPREL16", /* name */ 1181 FALSE, /* partial_inplace */ 1182 0, /* src_mask */ 1183 0xffff, /* dst_mask */ 1184 FALSE), /* pcrel_offset */ 1185 1186 /* Like GOT_TPREL16, but no overflow. */ 1187 HOWTO (R_PPC_GOT_TPREL16_LO, 1188 0, /* rightshift */ 1189 1, /* size (0 = byte, 1 = short, 2 = long) */ 1190 16, /* bitsize */ 1191 FALSE, /* pc_relative */ 1192 0, /* bitpos */ 1193 complain_overflow_dont, /* complain_on_overflow */ 1194 ppc_elf_unhandled_reloc, /* special_function */ 1195 "R_PPC_GOT_TPREL16_LO", /* name */ 1196 FALSE, /* partial_inplace */ 1197 0, /* src_mask */ 1198 0xffff, /* dst_mask */ 1199 FALSE), /* pcrel_offset */ 1200 1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ 1202 HOWTO (R_PPC_GOT_TPREL16_HI, 1203 16, /* rightshift */ 1204 1, /* size (0 = byte, 1 = short, 2 = long) */ 1205 16, /* bitsize */ 1206 FALSE, /* pc_relative */ 1207 0, /* bitpos */ 1208 complain_overflow_dont, /* complain_on_overflow */ 1209 ppc_elf_unhandled_reloc, /* special_function */ 1210 "R_PPC_GOT_TPREL16_HI", /* name */ 1211 FALSE, /* partial_inplace */ 1212 0, /* src_mask */ 1213 0xffff, /* dst_mask */ 1214 FALSE), /* pcrel_offset */ 1215 1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1217 HOWTO (R_PPC_GOT_TPREL16_HA, 1218 16, /* rightshift */ 1219 1, /* size (0 = byte, 1 = short, 2 = long) */ 1220 16, /* bitsize */ 1221 FALSE, /* pc_relative */ 1222 0, /* bitpos */ 1223 complain_overflow_dont, /* complain_on_overflow */ 1224 ppc_elf_unhandled_reloc, /* special_function */ 1225 "R_PPC_GOT_TPREL16_HA", /* name */ 1226 FALSE, /* partial_inplace */ 1227 0, /* src_mask */ 1228 0xffff, /* dst_mask */ 1229 FALSE), /* pcrel_offset */ 1230 1231 /* The remaining relocs are from the Embedded ELF ABI, and are not 1232 in the SVR4 ELF ABI. */ 1233 1234 /* 32 bit value resulting from the addend minus the symbol. */ 1235 HOWTO (R_PPC_EMB_NADDR32, /* type */ 1236 0, /* rightshift */ 1237 2, /* size (0 = byte, 1 = short, 2 = long) */ 1238 32, /* bitsize */ 1239 FALSE, /* pc_relative */ 1240 0, /* bitpos */ 1241 complain_overflow_dont, /* complain_on_overflow */ 1242 ppc_elf_unhandled_reloc, /* special_function */ 1243 "R_PPC_EMB_NADDR32", /* name */ 1244 FALSE, /* partial_inplace */ 1245 0, /* src_mask */ 1246 0xffffffff, /* dst_mask */ 1247 FALSE), /* pcrel_offset */ 1248 1249 /* 16 bit value resulting from the addend minus the symbol. */ 1250 HOWTO (R_PPC_EMB_NADDR16, /* type */ 1251 0, /* rightshift */ 1252 1, /* size (0 = byte, 1 = short, 2 = long) */ 1253 16, /* bitsize */ 1254 FALSE, /* pc_relative */ 1255 0, /* bitpos */ 1256 complain_overflow_signed, /* complain_on_overflow */ 1257 ppc_elf_unhandled_reloc, /* special_function */ 1258 "R_PPC_EMB_NADDR16", /* name */ 1259 FALSE, /* partial_inplace */ 1260 0, /* src_mask */ 1261 0xffff, /* dst_mask */ 1262 FALSE), /* pcrel_offset */ 1263 1264 /* 16 bit value resulting from the addend minus the symbol. */ 1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ 1266 0, /* rightshift */ 1267 1, /* size (0 = byte, 1 = short, 2 = long) */ 1268 16, /* bitsize */ 1269 FALSE, /* pc_relative */ 1270 0, /* bitpos */ 1271 complain_overflow_dont,/* complain_on_overflow */ 1272 ppc_elf_unhandled_reloc, /* special_function */ 1273 "R_PPC_EMB_ADDR16_LO", /* name */ 1274 FALSE, /* partial_inplace */ 1275 0, /* src_mask */ 1276 0xffff, /* dst_mask */ 1277 FALSE), /* pcrel_offset */ 1278 1279 /* The high order 16 bits of the addend minus the symbol. */ 1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ 1281 16, /* rightshift */ 1282 1, /* size (0 = byte, 1 = short, 2 = long) */ 1283 16, /* bitsize */ 1284 FALSE, /* pc_relative */ 1285 0, /* bitpos */ 1286 complain_overflow_dont, /* complain_on_overflow */ 1287 ppc_elf_unhandled_reloc, /* special_function */ 1288 "R_PPC_EMB_NADDR16_HI", /* name */ 1289 FALSE, /* partial_inplace */ 1290 0, /* src_mask */ 1291 0xffff, /* dst_mask */ 1292 FALSE), /* pcrel_offset */ 1293 1294 /* The high order 16 bits of the result of the addend minus the address, 1295 plus 1 if the contents of the low 16 bits, treated as a signed number, 1296 is negative. */ 1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ 1298 16, /* rightshift */ 1299 1, /* size (0 = byte, 1 = short, 2 = long) */ 1300 16, /* bitsize */ 1301 FALSE, /* pc_relative */ 1302 0, /* bitpos */ 1303 complain_overflow_dont, /* complain_on_overflow */ 1304 ppc_elf_unhandled_reloc, /* special_function */ 1305 "R_PPC_EMB_NADDR16_HA", /* name */ 1306 FALSE, /* partial_inplace */ 1307 0, /* src_mask */ 1308 0xffff, /* dst_mask */ 1309 FALSE), /* pcrel_offset */ 1310 1311 /* 16 bit value resulting from allocating a 4 byte word to hold an 1312 address in the .sdata section, and returning the offset from 1313 _SDA_BASE_ for that relocation. */ 1314 HOWTO (R_PPC_EMB_SDAI16, /* type */ 1315 0, /* rightshift */ 1316 1, /* size (0 = byte, 1 = short, 2 = long) */ 1317 16, /* bitsize */ 1318 FALSE, /* pc_relative */ 1319 0, /* bitpos */ 1320 complain_overflow_signed, /* complain_on_overflow */ 1321 ppc_elf_unhandled_reloc, /* special_function */ 1322 "R_PPC_EMB_SDAI16", /* name */ 1323 FALSE, /* partial_inplace */ 1324 0, /* src_mask */ 1325 0xffff, /* dst_mask */ 1326 FALSE), /* pcrel_offset */ 1327 1328 /* 16 bit value resulting from allocating a 4 byte word to hold an 1329 address in the .sdata2 section, and returning the offset from 1330 _SDA2_BASE_ for that relocation. */ 1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */ 1332 0, /* rightshift */ 1333 1, /* size (0 = byte, 1 = short, 2 = long) */ 1334 16, /* bitsize */ 1335 FALSE, /* pc_relative */ 1336 0, /* bitpos */ 1337 complain_overflow_signed, /* complain_on_overflow */ 1338 ppc_elf_unhandled_reloc, /* special_function */ 1339 "R_PPC_EMB_SDA2I16", /* name */ 1340 FALSE, /* partial_inplace */ 1341 0, /* src_mask */ 1342 0xffff, /* dst_mask */ 1343 FALSE), /* pcrel_offset */ 1344 1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with 1346 small data items. */ 1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */ 1348 0, /* rightshift */ 1349 1, /* size (0 = byte, 1 = short, 2 = long) */ 1350 16, /* bitsize */ 1351 FALSE, /* pc_relative */ 1352 0, /* bitpos */ 1353 complain_overflow_signed, /* complain_on_overflow */ 1354 ppc_elf_unhandled_reloc, /* special_function */ 1355 "R_PPC_EMB_SDA2REL", /* name */ 1356 FALSE, /* partial_inplace */ 1357 0, /* src_mask */ 1358 0xffff, /* dst_mask */ 1359 FALSE), /* pcrel_offset */ 1360 1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit 1362 signed offset from the appropriate base, and filling in the register 1363 field with the appropriate register (0, 2, or 13). */ 1364 HOWTO (R_PPC_EMB_SDA21, /* type */ 1365 0, /* rightshift */ 1366 2, /* size (0 = byte, 1 = short, 2 = long) */ 1367 16, /* bitsize */ 1368 FALSE, /* pc_relative */ 1369 0, /* bitpos */ 1370 complain_overflow_signed, /* complain_on_overflow */ 1371 ppc_elf_unhandled_reloc, /* special_function */ 1372 "R_PPC_EMB_SDA21", /* name */ 1373 FALSE, /* partial_inplace */ 1374 0, /* src_mask */ 1375 0xffff, /* dst_mask */ 1376 FALSE), /* pcrel_offset */ 1377 1378 /* Relocation not handled: R_PPC_EMB_MRKREF */ 1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */ 1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */ 1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */ 1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */ 1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */ 1384 1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling 1386 in the 16 bit signed offset from the appropriate base, and filling in the 1387 register field with the appropriate register (0, 2, or 13). */ 1388 HOWTO (R_PPC_EMB_RELSDA, /* type */ 1389 0, /* rightshift */ 1390 1, /* size (0 = byte, 1 = short, 2 = long) */ 1391 16, /* bitsize */ 1392 FALSE, /* pc_relative */ 1393 0, /* bitpos */ 1394 complain_overflow_signed, /* complain_on_overflow */ 1395 ppc_elf_unhandled_reloc, /* special_function */ 1396 "R_PPC_EMB_RELSDA", /* name */ 1397 FALSE, /* partial_inplace */ 1398 0, /* src_mask */ 1399 0xffff, /* dst_mask */ 1400 FALSE), /* pcrel_offset */ 1401 1402 /* A relative 8 bit branch. */ 1403 HOWTO (R_PPC_VLE_REL8, /* type */ 1404 1, /* rightshift */ 1405 1, /* size (0 = byte, 1 = short, 2 = long) */ 1406 8, /* bitsize */ 1407 TRUE, /* pc_relative */ 1408 0, /* bitpos */ 1409 complain_overflow_signed, /* complain_on_overflow */ 1410 bfd_elf_generic_reloc, /* special_function */ 1411 "R_PPC_VLE_REL8", /* name */ 1412 FALSE, /* partial_inplace */ 1413 0, /* src_mask */ 1414 0xff, /* dst_mask */ 1415 TRUE), /* pcrel_offset */ 1416 1417 /* A relative 15 bit branch. */ 1418 HOWTO (R_PPC_VLE_REL15, /* type */ 1419 1, /* rightshift */ 1420 2, /* size (0 = byte, 1 = short, 2 = long) */ 1421 15, /* bitsize */ 1422 TRUE, /* pc_relative */ 1423 1, /* bitpos */ 1424 complain_overflow_signed, /* complain_on_overflow */ 1425 bfd_elf_generic_reloc, /* special_function */ 1426 "R_PPC_VLE_REL15", /* name */ 1427 FALSE, /* partial_inplace */ 1428 0, /* src_mask */ 1429 0xfe, /* dst_mask */ 1430 TRUE), /* pcrel_offset */ 1431 1432 /* A relative 24 bit branch. */ 1433 HOWTO (R_PPC_VLE_REL24, /* type */ 1434 1, /* rightshift */ 1435 2, /* size (0 = byte, 1 = short, 2 = long) */ 1436 24, /* bitsize */ 1437 TRUE, /* pc_relative */ 1438 1, /* bitpos */ 1439 complain_overflow_signed, /* complain_on_overflow */ 1440 bfd_elf_generic_reloc, /* special_function */ 1441 "R_PPC_VLE_REL24", /* name */ 1442 FALSE, /* partial_inplace */ 1443 0, /* src_mask */ 1444 0x1fffffe, /* dst_mask */ 1445 TRUE), /* pcrel_offset */ 1446 1447 /* The 16 LSBS in split16a format. */ 1448 HOWTO (R_PPC_VLE_LO16A, /* type */ 1449 0, /* rightshift */ 1450 2, /* size (0 = byte, 1 = short, 2 = long) */ 1451 16, /* bitsize */ 1452 FALSE, /* pc_relative */ 1453 0, /* bitpos */ 1454 complain_overflow_dont, /* complain_on_overflow */ 1455 ppc_elf_unhandled_reloc, /* special_function */ 1456 "R_PPC_VLE_LO16A", /* name */ 1457 FALSE, /* partial_inplace */ 1458 0, /* src_mask */ 1459 0x1f007ff, /* dst_mask */ 1460 FALSE), /* pcrel_offset */ 1461 1462 /* The 16 LSBS in split16d format. */ 1463 HOWTO (R_PPC_VLE_LO16D, /* type */ 1464 0, /* rightshift */ 1465 2, /* size (0 = byte, 1 = short, 2 = long) */ 1466 16, /* bitsize */ 1467 FALSE, /* pc_relative */ 1468 0, /* bitpos */ 1469 complain_overflow_dont, /* complain_on_overflow */ 1470 ppc_elf_unhandled_reloc, /* special_function */ 1471 "R_PPC_VLE_LO16D", /* name */ 1472 FALSE, /* partial_inplace */ 1473 0, /* src_mask */ 1474 0x1f07ff, /* dst_mask */ 1475 FALSE), /* pcrel_offset */ 1476 1477 /* Bits 16-31 split16a format. */ 1478 HOWTO (R_PPC_VLE_HI16A, /* type */ 1479 16, /* rightshift */ 1480 2, /* size (0 = byte, 1 = short, 2 = long) */ 1481 16, /* bitsize */ 1482 FALSE, /* pc_relative */ 1483 0, /* bitpos */ 1484 complain_overflow_dont, /* complain_on_overflow */ 1485 ppc_elf_unhandled_reloc, /* special_function */ 1486 "R_PPC_VLE_HI16A", /* name */ 1487 FALSE, /* partial_inplace */ 1488 0, /* src_mask */ 1489 0x1f007ff, /* dst_mask */ 1490 FALSE), /* pcrel_offset */ 1491 1492 /* Bits 16-31 split16d format. */ 1493 HOWTO (R_PPC_VLE_HI16D, /* type */ 1494 16, /* rightshift */ 1495 2, /* size (0 = byte, 1 = short, 2 = long) */ 1496 16, /* bitsize */ 1497 FALSE, /* pc_relative */ 1498 0, /* bitpos */ 1499 complain_overflow_dont, /* complain_on_overflow */ 1500 ppc_elf_unhandled_reloc, /* special_function */ 1501 "R_PPC_VLE_HI16D", /* name */ 1502 FALSE, /* partial_inplace */ 1503 0, /* src_mask */ 1504 0x1f07ff, /* dst_mask */ 1505 FALSE), /* pcrel_offset */ 1506 1507 /* Bits 16-31 (High Adjusted) in split16a format. */ 1508 HOWTO (R_PPC_VLE_HA16A, /* type */ 1509 16, /* rightshift */ 1510 2, /* size (0 = byte, 1 = short, 2 = long) */ 1511 16, /* bitsize */ 1512 FALSE, /* pc_relative */ 1513 0, /* bitpos */ 1514 complain_overflow_dont, /* complain_on_overflow */ 1515 ppc_elf_unhandled_reloc, /* special_function */ 1516 "R_PPC_VLE_HA16A", /* name */ 1517 FALSE, /* partial_inplace */ 1518 0, /* src_mask */ 1519 0x1f007ff, /* dst_mask */ 1520 FALSE), /* pcrel_offset */ 1521 1522 /* Bits 16-31 (High Adjusted) in split16d format. */ 1523 HOWTO (R_PPC_VLE_HA16D, /* type */ 1524 16, /* rightshift */ 1525 2, /* size (0 = byte, 1 = short, 2 = long) */ 1526 16, /* bitsize */ 1527 FALSE, /* pc_relative */ 1528 0, /* bitpos */ 1529 complain_overflow_dont, /* complain_on_overflow */ 1530 ppc_elf_unhandled_reloc, /* special_function */ 1531 "R_PPC_VLE_HA16D", /* name */ 1532 FALSE, /* partial_inplace */ 1533 0, /* src_mask */ 1534 0x1f07ff, /* dst_mask */ 1535 FALSE), /* pcrel_offset */ 1536 1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i 1538 instructions. If the register base is 0 then the linker changes 1539 the e_add16i to an e_li instruction. */ 1540 HOWTO (R_PPC_VLE_SDA21, /* type */ 1541 0, /* rightshift */ 1542 2, /* size (0 = byte, 1 = short, 2 = long) */ 1543 16, /* bitsize */ 1544 FALSE, /* pc_relative */ 1545 0, /* bitpos */ 1546 complain_overflow_signed, /* complain_on_overflow */ 1547 ppc_elf_unhandled_reloc, /* special_function */ 1548 "R_PPC_VLE_SDA21", /* name */ 1549 FALSE, /* partial_inplace */ 1550 0, /* src_mask */ 1551 0xffff, /* dst_mask */ 1552 FALSE), /* pcrel_offset */ 1553 1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */ 1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */ 1556 0, /* rightshift */ 1557 2, /* size (0 = byte, 1 = short, 2 = long) */ 1558 16, /* bitsize */ 1559 FALSE, /* pc_relative */ 1560 0, /* bitpos */ 1561 complain_overflow_dont, /* complain_on_overflow */ 1562 ppc_elf_unhandled_reloc, /* special_function */ 1563 "R_PPC_VLE_SDA21_LO", /* name */ 1564 FALSE, /* partial_inplace */ 1565 0, /* src_mask */ 1566 0xffff, /* dst_mask */ 1567 FALSE), /* pcrel_offset */ 1568 1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */ 1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */ 1571 0, /* rightshift */ 1572 2, /* size (0 = byte, 1 = short, 2 = long) */ 1573 16, /* bitsize */ 1574 FALSE, /* pc_relative */ 1575 0, /* bitpos */ 1576 complain_overflow_dont, /* complain_on_overflow */ 1577 ppc_elf_unhandled_reloc, /* special_function */ 1578 "R_PPC_VLE_SDAREL_LO16A", /* name */ 1579 FALSE, /* partial_inplace */ 1580 0, /* src_mask */ 1581 0x1f007ff, /* dst_mask */ 1582 FALSE), /* pcrel_offset */ 1583 1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */ 1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */ 1586 0, /* rightshift */ 1587 2, /* size (0 = byte, 1 = short, 2 = long) */ 1588 16, /* bitsize */ 1589 FALSE, /* pc_relative */ 1590 0, /* bitpos */ 1591 complain_overflow_dont, /* complain_on_overflow */ 1592 ppc_elf_unhandled_reloc, /* special_function */ 1593 "R_PPC_VLE_SDAREL_LO16D", /* name */ 1594 FALSE, /* partial_inplace */ 1595 0, /* src_mask */ 1596 0x1f07ff, /* dst_mask */ 1597 FALSE), /* pcrel_offset */ 1598 1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */ 1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */ 1601 16, /* rightshift */ 1602 2, /* size (0 = byte, 1 = short, 2 = long) */ 1603 16, /* bitsize */ 1604 FALSE, /* pc_relative */ 1605 0, /* bitpos */ 1606 complain_overflow_dont, /* complain_on_overflow */ 1607 ppc_elf_unhandled_reloc, /* special_function */ 1608 "R_PPC_VLE_SDAREL_HI16A", /* name */ 1609 FALSE, /* partial_inplace */ 1610 0, /* src_mask */ 1611 0x1f007ff, /* dst_mask */ 1612 FALSE), /* pcrel_offset */ 1613 1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */ 1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */ 1616 16, /* rightshift */ 1617 2, /* size (0 = byte, 1 = short, 2 = long) */ 1618 16, /* bitsize */ 1619 FALSE, /* pc_relative */ 1620 0, /* bitpos */ 1621 complain_overflow_dont, /* complain_on_overflow */ 1622 ppc_elf_unhandled_reloc, /* special_function */ 1623 "R_PPC_VLE_SDAREL_HI16D", /* name */ 1624 FALSE, /* partial_inplace */ 1625 0, /* src_mask */ 1626 0x1f07ff, /* dst_mask */ 1627 FALSE), /* pcrel_offset */ 1628 1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */ 1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */ 1631 16, /* rightshift */ 1632 2, /* size (0 = byte, 1 = short, 2 = long) */ 1633 16, /* bitsize */ 1634 FALSE, /* pc_relative */ 1635 0, /* bitpos */ 1636 complain_overflow_dont, /* complain_on_overflow */ 1637 ppc_elf_unhandled_reloc, /* special_function */ 1638 "R_PPC_VLE_SDAREL_HA16A", /* name */ 1639 FALSE, /* partial_inplace */ 1640 0, /* src_mask */ 1641 0x1f007ff, /* dst_mask */ 1642 FALSE), /* pcrel_offset */ 1643 1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */ 1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */ 1646 16, /* rightshift */ 1647 2, /* size (0 = byte, 1 = short, 2 = long) */ 1648 16, /* bitsize */ 1649 FALSE, /* pc_relative */ 1650 0, /* bitpos */ 1651 complain_overflow_dont, /* complain_on_overflow */ 1652 ppc_elf_unhandled_reloc, /* special_function */ 1653 "R_PPC_VLE_SDAREL_HA16D", /* name */ 1654 FALSE, /* partial_inplace */ 1655 0, /* src_mask */ 1656 0x1f07ff, /* dst_mask */ 1657 FALSE), /* pcrel_offset */ 1658 1659 HOWTO (R_PPC_IRELATIVE, /* type */ 1660 0, /* rightshift */ 1661 2, /* size (0 = byte, 1 = short, 2 = long) */ 1662 32, /* bitsize */ 1663 FALSE, /* pc_relative */ 1664 0, /* bitpos */ 1665 complain_overflow_dont, /* complain_on_overflow */ 1666 ppc_elf_unhandled_reloc, /* special_function */ 1667 "R_PPC_IRELATIVE", /* name */ 1668 FALSE, /* partial_inplace */ 1669 0, /* src_mask */ 1670 0xffffffff, /* dst_mask */ 1671 FALSE), /* pcrel_offset */ 1672 1673 /* A 16 bit relative relocation. */ 1674 HOWTO (R_PPC_REL16, /* type */ 1675 0, /* rightshift */ 1676 1, /* size (0 = byte, 1 = short, 2 = long) */ 1677 16, /* bitsize */ 1678 TRUE, /* pc_relative */ 1679 0, /* bitpos */ 1680 complain_overflow_signed, /* complain_on_overflow */ 1681 bfd_elf_generic_reloc, /* special_function */ 1682 "R_PPC_REL16", /* name */ 1683 FALSE, /* partial_inplace */ 1684 0, /* src_mask */ 1685 0xffff, /* dst_mask */ 1686 TRUE), /* pcrel_offset */ 1687 1688 /* A 16 bit relative relocation without overflow. */ 1689 HOWTO (R_PPC_REL16_LO, /* type */ 1690 0, /* rightshift */ 1691 1, /* size (0 = byte, 1 = short, 2 = long) */ 1692 16, /* bitsize */ 1693 TRUE, /* pc_relative */ 1694 0, /* bitpos */ 1695 complain_overflow_dont,/* complain_on_overflow */ 1696 bfd_elf_generic_reloc, /* special_function */ 1697 "R_PPC_REL16_LO", /* name */ 1698 FALSE, /* partial_inplace */ 1699 0, /* src_mask */ 1700 0xffff, /* dst_mask */ 1701 TRUE), /* pcrel_offset */ 1702 1703 /* The high order 16 bits of a relative address. */ 1704 HOWTO (R_PPC_REL16_HI, /* type */ 1705 16, /* rightshift */ 1706 1, /* size (0 = byte, 1 = short, 2 = long) */ 1707 16, /* bitsize */ 1708 TRUE, /* pc_relative */ 1709 0, /* bitpos */ 1710 complain_overflow_dont, /* complain_on_overflow */ 1711 bfd_elf_generic_reloc, /* special_function */ 1712 "R_PPC_REL16_HI", /* name */ 1713 FALSE, /* partial_inplace */ 1714 0, /* src_mask */ 1715 0xffff, /* dst_mask */ 1716 TRUE), /* pcrel_offset */ 1717 1718 /* The high order 16 bits of a relative address, plus 1 if the contents of 1719 the low 16 bits, treated as a signed number, is negative. */ 1720 HOWTO (R_PPC_REL16_HA, /* type */ 1721 16, /* rightshift */ 1722 1, /* size (0 = byte, 1 = short, 2 = long) */ 1723 16, /* bitsize */ 1724 TRUE, /* pc_relative */ 1725 0, /* bitpos */ 1726 complain_overflow_dont, /* complain_on_overflow */ 1727 ppc_elf_addr16_ha_reloc, /* special_function */ 1728 "R_PPC_REL16_HA", /* name */ 1729 FALSE, /* partial_inplace */ 1730 0, /* src_mask */ 1731 0xffff, /* dst_mask */ 1732 TRUE), /* pcrel_offset */ 1733 1734 /* Like R_PPC_REL16_HA but for split field in addpcis. */ 1735 HOWTO (R_PPC_REL16DX_HA, /* type */ 1736 16, /* rightshift */ 1737 2, /* size (0 = byte, 1 = short, 2 = long) */ 1738 16, /* bitsize */ 1739 TRUE, /* pc_relative */ 1740 0, /* bitpos */ 1741 complain_overflow_signed, /* complain_on_overflow */ 1742 ppc_elf_addr16_ha_reloc, /* special_function */ 1743 "R_PPC_REL16DX_HA", /* name */ 1744 FALSE, /* partial_inplace */ 1745 0, /* src_mask */ 1746 0x1fffc1, /* dst_mask */ 1747 TRUE), /* pcrel_offset */ 1748 1749 /* GNU extension to record C++ vtable hierarchy. */ 1750 HOWTO (R_PPC_GNU_VTINHERIT, /* type */ 1751 0, /* rightshift */ 1752 0, /* size (0 = byte, 1 = short, 2 = long) */ 1753 0, /* bitsize */ 1754 FALSE, /* pc_relative */ 1755 0, /* bitpos */ 1756 complain_overflow_dont, /* complain_on_overflow */ 1757 NULL, /* special_function */ 1758 "R_PPC_GNU_VTINHERIT", /* name */ 1759 FALSE, /* partial_inplace */ 1760 0, /* src_mask */ 1761 0, /* dst_mask */ 1762 FALSE), /* pcrel_offset */ 1763 1764 /* GNU extension to record C++ vtable member usage. */ 1765 HOWTO (R_PPC_GNU_VTENTRY, /* type */ 1766 0, /* rightshift */ 1767 0, /* size (0 = byte, 1 = short, 2 = long) */ 1768 0, /* bitsize */ 1769 FALSE, /* pc_relative */ 1770 0, /* bitpos */ 1771 complain_overflow_dont, /* complain_on_overflow */ 1772 NULL, /* special_function */ 1773 "R_PPC_GNU_VTENTRY", /* name */ 1774 FALSE, /* partial_inplace */ 1775 0, /* src_mask */ 1776 0, /* dst_mask */ 1777 FALSE), /* pcrel_offset */ 1778 1779 /* Phony reloc to handle AIX style TOC entries. */ 1780 HOWTO (R_PPC_TOC16, /* type */ 1781 0, /* rightshift */ 1782 1, /* size (0 = byte, 1 = short, 2 = long) */ 1783 16, /* bitsize */ 1784 FALSE, /* pc_relative */ 1785 0, /* bitpos */ 1786 complain_overflow_signed, /* complain_on_overflow */ 1787 ppc_elf_unhandled_reloc, /* special_function */ 1788 "R_PPC_TOC16", /* name */ 1789 FALSE, /* partial_inplace */ 1790 0, /* src_mask */ 1791 0xffff, /* dst_mask */ 1792 FALSE), /* pcrel_offset */ 1793 }; 1794 1795 /* External 32-bit PPC structure for PRPSINFO. This structure is 1796 ABI-defined, thus we choose to use char arrays here in order to 1797 avoid dealing with different types in different architectures. 1798 1799 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while 1800 most non-PPC architectures use `short int'. 1801 1802 This structure will ultimately be written in the corefile's note 1803 section, as the PRPSINFO. */ 1804 1805 struct elf_external_ppc_linux_prpsinfo32 1806 { 1807 char pr_state; /* Numeric process state. */ 1808 char pr_sname; /* Char for pr_state. */ 1809 char pr_zomb; /* Zombie. */ 1810 char pr_nice; /* Nice val. */ 1811 char pr_flag[4]; /* Flags. */ 1812 char pr_uid[4]; 1813 char pr_gid[4]; 1814 char pr_pid[4]; 1815 char pr_ppid[4]; 1816 char pr_pgrp[4]; 1817 char pr_sid[4]; 1818 char pr_fname[16]; /* Filename of executable. */ 1819 char pr_psargs[80]; /* Initial part of arg list. */ 1820 }; 1821 1822 /* Helper function to copy an elf_internal_linux_prpsinfo in host 1823 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */ 1824 1825 static inline void 1826 swap_ppc_linux_prpsinfo32_out (bfd *obfd, 1827 const struct elf_internal_linux_prpsinfo *from, 1828 struct elf_external_ppc_linux_prpsinfo32 *to) 1829 { 1830 bfd_put_8 (obfd, from->pr_state, &to->pr_state); 1831 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname); 1832 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb); 1833 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice); 1834 bfd_put_32 (obfd, from->pr_flag, to->pr_flag); 1835 bfd_put_32 (obfd, from->pr_uid, to->pr_uid); 1836 bfd_put_32 (obfd, from->pr_gid, to->pr_gid); 1837 bfd_put_32 (obfd, from->pr_pid, to->pr_pid); 1838 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid); 1839 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp); 1840 bfd_put_32 (obfd, from->pr_sid, to->pr_sid); 1841 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname)); 1842 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs)); 1843 } 1844 1845 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ 1847 1848 static void 1849 ppc_elf_howto_init (void) 1850 { 1851 unsigned int i, type; 1852 1853 for (i = 0; 1854 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 1855 i++) 1856 { 1857 type = ppc_elf_howto_raw[i].type; 1858 if (type >= (sizeof (ppc_elf_howto_table) 1859 / sizeof (ppc_elf_howto_table[0]))) 1860 abort (); 1861 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; 1862 } 1863 } 1864 1865 static reloc_howto_type * 1866 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1867 bfd_reloc_code_real_type code) 1868 { 1869 enum elf_ppc_reloc_type r; 1870 1871 /* Initialize howto table if not already done. */ 1872 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1873 ppc_elf_howto_init (); 1874 1875 switch (code) 1876 { 1877 default: 1878 return NULL; 1879 1880 case BFD_RELOC_NONE: r = R_PPC_NONE; break; 1881 case BFD_RELOC_32: r = R_PPC_ADDR32; break; 1882 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; 1883 case BFD_RELOC_PPC64_ADDR16_DS: 1884 case BFD_RELOC_16: r = R_PPC_ADDR16; break; 1885 case BFD_RELOC_PPC64_ADDR16_LO_DS: 1886 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; 1887 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; 1888 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; 1889 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; 1890 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; 1891 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; 1892 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; 1893 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; 1894 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; 1895 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; 1896 case BFD_RELOC_PPC64_GOT16_DS: 1897 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; 1898 case BFD_RELOC_PPC64_GOT16_LO_DS: 1899 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; 1900 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; 1901 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; 1902 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; 1903 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; 1904 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; 1905 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; 1906 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; 1907 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; 1908 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; 1909 case BFD_RELOC_PPC64_PLT16_LO_DS: 1910 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; 1911 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; 1912 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; 1913 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; 1914 case BFD_RELOC_PPC64_SECTOFF_DS: 1915 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; 1916 case BFD_RELOC_PPC64_SECTOFF_LO_DS: 1917 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; 1918 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; 1919 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; 1920 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; 1921 case BFD_RELOC_PPC64_TOC16_DS: 1922 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; 1923 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; 1924 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; 1925 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; 1926 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; 1927 case BFD_RELOC_PPC64_TPREL16_DS: 1928 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; 1929 case BFD_RELOC_PPC64_TPREL16_LO_DS: 1930 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; 1931 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; 1932 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; 1933 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; 1934 case BFD_RELOC_PPC64_DTPREL16_DS: 1935 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; 1936 case BFD_RELOC_PPC64_DTPREL16_LO_DS: 1937 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; 1938 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; 1939 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; 1940 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; 1941 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; 1942 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; 1943 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; 1944 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; 1945 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; 1946 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; 1947 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; 1948 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; 1949 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; 1950 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; 1951 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; 1952 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; 1953 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; 1954 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; 1955 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; 1956 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; 1957 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; 1958 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; 1959 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; 1960 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; 1961 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; 1962 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; 1963 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; 1964 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; 1965 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; 1966 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; 1967 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; 1968 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; 1969 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; 1970 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; 1971 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; 1972 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; 1973 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break; 1974 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break; 1975 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break; 1976 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break; 1977 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break; 1978 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break; 1979 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break; 1980 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break; 1981 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break; 1982 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break; 1983 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break; 1984 case BFD_RELOC_PPC_VLE_SDAREL_LO16A: 1985 r = R_PPC_VLE_SDAREL_LO16A; 1986 break; 1987 case BFD_RELOC_PPC_VLE_SDAREL_LO16D: 1988 r = R_PPC_VLE_SDAREL_LO16D; 1989 break; 1990 case BFD_RELOC_PPC_VLE_SDAREL_HI16A: 1991 r = R_PPC_VLE_SDAREL_HI16A; 1992 break; 1993 case BFD_RELOC_PPC_VLE_SDAREL_HI16D: 1994 r = R_PPC_VLE_SDAREL_HI16D; 1995 break; 1996 case BFD_RELOC_PPC_VLE_SDAREL_HA16A: 1997 r = R_PPC_VLE_SDAREL_HA16A; 1998 break; 1999 case BFD_RELOC_PPC_VLE_SDAREL_HA16D: 2000 r = R_PPC_VLE_SDAREL_HA16D; 2001 break; 2002 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; 2003 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; 2004 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; 2005 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; 2006 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break; 2007 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; 2008 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; 2009 } 2010 2011 return ppc_elf_howto_table[r]; 2012 }; 2013 2014 static reloc_howto_type * 2015 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 2016 const char *r_name) 2017 { 2018 unsigned int i; 2019 2020 for (i = 0; 2021 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 2022 i++) 2023 if (ppc_elf_howto_raw[i].name != NULL 2024 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0) 2025 return &ppc_elf_howto_raw[i]; 2026 2027 return NULL; 2028 } 2029 2030 /* Set the howto pointer for a PowerPC ELF reloc. */ 2031 2032 static void 2033 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 2034 arelent *cache_ptr, 2035 Elf_Internal_Rela *dst) 2036 { 2037 unsigned int r_type; 2038 2039 /* Initialize howto table if not already done. */ 2040 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 2041 ppc_elf_howto_init (); 2042 2043 r_type = ELF32_R_TYPE (dst->r_info); 2044 if (r_type >= R_PPC_max) 2045 { 2046 (*_bfd_error_handler) (_("%B: unrecognised PPC reloc number: %d"), 2047 abfd, r_type); 2048 bfd_set_error (bfd_error_bad_value); 2049 r_type = R_PPC_NONE; 2050 } 2051 cache_ptr->howto = ppc_elf_howto_table[r_type]; 2052 2053 /* Just because the above assert didn't trigger doesn't mean that 2054 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */ 2055 if (!cache_ptr->howto) 2056 { 2057 (*_bfd_error_handler) (_("%B: invalid relocation type %d"), 2058 abfd, r_type); 2059 bfd_set_error (bfd_error_bad_value); 2060 2061 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE]; 2062 } 2063 } 2064 2065 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ 2066 2067 static bfd_reloc_status_type 2068 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, 2069 arelent *reloc_entry, 2070 asymbol *symbol, 2071 void *data ATTRIBUTE_UNUSED, 2072 asection *input_section, 2073 bfd *output_bfd, 2074 char **error_message ATTRIBUTE_UNUSED) 2075 { 2076 enum elf_ppc_reloc_type r_type; 2077 long insn; 2078 bfd_size_type octets; 2079 bfd_vma value; 2080 2081 if (output_bfd != NULL) 2082 { 2083 reloc_entry->address += input_section->output_offset; 2084 return bfd_reloc_ok; 2085 } 2086 2087 reloc_entry->addend += 0x8000; 2088 r_type = reloc_entry->howto->type; 2089 if (r_type != R_PPC_REL16DX_HA) 2090 return bfd_reloc_continue; 2091 2092 value = 0; 2093 if (!bfd_is_com_section (symbol->section)) 2094 value = symbol->value; 2095 value += (reloc_entry->addend 2096 + symbol->section->output_offset 2097 + symbol->section->output_section->vma); 2098 value -= (reloc_entry->address 2099 + input_section->output_offset 2100 + input_section->output_section->vma); 2101 value >>= 16; 2102 2103 octets = reloc_entry->address * bfd_octets_per_byte (abfd); 2104 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); 2105 insn &= ~0x1fffc1; 2106 insn |= (value & 0xffc1) | ((value & 0x3e) << 15); 2107 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); 2108 return bfd_reloc_ok; 2109 } 2110 2111 static bfd_reloc_status_type 2112 ppc_elf_unhandled_reloc (bfd *abfd, 2113 arelent *reloc_entry, 2114 asymbol *symbol, 2115 void *data, 2116 asection *input_section, 2117 bfd *output_bfd, 2118 char **error_message) 2119 { 2120 /* If this is a relocatable link (output_bfd test tells us), just 2121 call the generic function. Any adjustment will be done at final 2122 link time. */ 2123 if (output_bfd != NULL) 2124 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2125 input_section, output_bfd, error_message); 2126 2127 if (error_message != NULL) 2128 { 2129 static char buf[60]; 2130 sprintf (buf, _("generic linker can't handle %s"), 2131 reloc_entry->howto->name); 2132 *error_message = buf; 2133 } 2134 return bfd_reloc_dangerous; 2135 } 2136 2137 /* Sections created by the linker. */ 2139 2140 typedef struct elf_linker_section 2141 { 2142 /* Pointer to the bfd section. */ 2143 asection *section; 2144 /* Section name. */ 2145 const char *name; 2146 /* Associated bss section name. */ 2147 const char *bss_name; 2148 /* Associated symbol name. */ 2149 const char *sym_name; 2150 /* Associated symbol. */ 2151 struct elf_link_hash_entry *sym; 2152 } elf_linker_section_t; 2153 2154 /* Linked list of allocated pointer entries. This hangs off of the 2155 symbol lists, and provides allows us to return different pointers, 2156 based on different addend's. */ 2157 2158 typedef struct elf_linker_section_pointers 2159 { 2160 /* next allocated pointer for this symbol */ 2161 struct elf_linker_section_pointers *next; 2162 /* offset of pointer from beginning of section */ 2163 bfd_vma offset; 2164 /* addend used */ 2165 bfd_vma addend; 2166 /* which linker section this is */ 2167 elf_linker_section_t *lsect; 2168 } elf_linker_section_pointers_t; 2169 2170 struct ppc_elf_obj_tdata 2171 { 2172 struct elf_obj_tdata elf; 2173 2174 /* A mapping from local symbols to offsets into the various linker 2175 sections added. This is index by the symbol index. */ 2176 elf_linker_section_pointers_t **linker_section_pointers; 2177 2178 /* Flags used to auto-detect plt type. */ 2179 unsigned int makes_plt_call : 1; 2180 unsigned int has_rel16 : 1; 2181 }; 2182 2183 #define ppc_elf_tdata(bfd) \ 2184 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) 2185 2186 #define elf_local_ptr_offsets(bfd) \ 2187 (ppc_elf_tdata (bfd)->linker_section_pointers) 2188 2189 #define is_ppc_elf(bfd) \ 2190 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 2191 && elf_object_id (bfd) == PPC32_ELF_DATA) 2192 2193 /* Override the generic function because we store some extras. */ 2194 2195 static bfd_boolean 2196 ppc_elf_mkobject (bfd *abfd) 2197 { 2198 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata), 2199 PPC32_ELF_DATA); 2200 } 2201 2202 /* When defaulting arch/mach, decode apuinfo to find a better match. */ 2203 2204 bfd_boolean 2205 _bfd_elf_ppc_set_arch (bfd *abfd) 2206 { 2207 unsigned long mach = 0; 2208 asection *s; 2209 unsigned char *contents; 2210 2211 if (abfd->arch_info->bits_per_word == 32 2212 && bfd_big_endian (abfd)) 2213 { 2214 2215 for (s = abfd->sections; s != NULL; s = s->next) 2216 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0) 2217 break; 2218 if (s != NULL) 2219 mach = bfd_mach_ppc_vle; 2220 } 2221 2222 if (mach == 0) 2223 { 2224 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2225 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents)) 2226 { 2227 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4); 2228 unsigned int i; 2229 2230 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4) 2231 { 2232 unsigned int val = bfd_get_32 (abfd, contents + i); 2233 switch (val >> 16) 2234 { 2235 case PPC_APUINFO_PMR: 2236 case PPC_APUINFO_RFMCI: 2237 if (mach == 0) 2238 mach = bfd_mach_ppc_titan; 2239 break; 2240 2241 case PPC_APUINFO_ISEL: 2242 case PPC_APUINFO_CACHELCK: 2243 if (mach == bfd_mach_ppc_titan) 2244 mach = bfd_mach_ppc_e500mc; 2245 break; 2246 2247 case PPC_APUINFO_SPE: 2248 case PPC_APUINFO_EFS: 2249 case PPC_APUINFO_BRLOCK: 2250 if (mach != bfd_mach_ppc_vle) 2251 mach = bfd_mach_ppc_e500; 2252 2253 case PPC_APUINFO_VLE: 2254 mach = bfd_mach_ppc_vle; 2255 break; 2256 2257 default: 2258 mach = -1ul; 2259 } 2260 } 2261 free (contents); 2262 } 2263 } 2264 2265 if (mach != 0 && mach != -1ul) 2266 { 2267 const bfd_arch_info_type *arch; 2268 2269 for (arch = abfd->arch_info->next; arch; arch = arch->next) 2270 if (arch->mach == mach) 2271 { 2272 abfd->arch_info = arch; 2273 break; 2274 } 2275 } 2276 return TRUE; 2277 } 2278 2279 /* Fix bad default arch selected for a 32 bit input bfd when the 2280 default is 64 bit. Also select arch based on apuinfo. */ 2281 2282 static bfd_boolean 2283 ppc_elf_object_p (bfd *abfd) 2284 { 2285 if (!abfd->arch_info->the_default) 2286 return TRUE; 2287 2288 if (abfd->arch_info->bits_per_word == 64) 2289 { 2290 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 2291 2292 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) 2293 { 2294 /* Relies on arch after 64 bit default being 32 bit default. */ 2295 abfd->arch_info = abfd->arch_info->next; 2296 BFD_ASSERT (abfd->arch_info->bits_per_word == 32); 2297 } 2298 } 2299 return _bfd_elf_ppc_set_arch (abfd); 2300 } 2301 2302 /* Function to set whether a module needs the -mrelocatable bit set. */ 2303 2304 static bfd_boolean 2305 ppc_elf_set_private_flags (bfd *abfd, flagword flags) 2306 { 2307 BFD_ASSERT (!elf_flags_init (abfd) 2308 || elf_elfheader (abfd)->e_flags == flags); 2309 2310 elf_elfheader (abfd)->e_flags = flags; 2311 elf_flags_init (abfd) = TRUE; 2312 return TRUE; 2313 } 2314 2315 /* Support for core dump NOTE sections. */ 2316 2317 static bfd_boolean 2318 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 2319 { 2320 int offset; 2321 unsigned int size; 2322 2323 switch (note->descsz) 2324 { 2325 default: 2326 return FALSE; 2327 2328 case 268: /* Linux/PPC. */ 2329 /* pr_cursig */ 2330 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); 2331 2332 /* pr_pid */ 2333 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); 2334 2335 /* pr_reg */ 2336 offset = 72; 2337 size = 192; 2338 2339 break; 2340 } 2341 2342 /* Make a ".reg/999" section. */ 2343 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 2344 size, note->descpos + offset); 2345 } 2346 2347 static bfd_boolean 2348 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 2349 { 2350 switch (note->descsz) 2351 { 2352 default: 2353 return FALSE; 2354 2355 case 128: /* Linux/PPC elf_prpsinfo. */ 2356 elf_tdata (abfd)->core->pid 2357 = bfd_get_32 (abfd, note->descdata + 16); 2358 elf_tdata (abfd)->core->program 2359 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 2360 elf_tdata (abfd)->core->command 2361 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 2362 } 2363 2364 /* Note that for some reason, a spurious space is tacked 2365 onto the end of the args in some (at least one anyway) 2366 implementations, so strip it off if it exists. */ 2367 2368 { 2369 char *command = elf_tdata (abfd)->core->command; 2370 int n = strlen (command); 2371 2372 if (0 < n && command[n - 1] == ' ') 2373 command[n - 1] = '\0'; 2374 } 2375 2376 return TRUE; 2377 } 2378 2379 char * 2380 elfcore_write_ppc_linux_prpsinfo32 2381 (bfd *abfd, 2382 char *buf, 2383 int *bufsiz, 2384 const struct elf_internal_linux_prpsinfo *prpsinfo) 2385 { 2386 struct elf_external_ppc_linux_prpsinfo32 data; 2387 2388 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data); 2389 return elfcore_write_note (abfd, buf, bufsiz, 2390 "CORE", NT_PRPSINFO, &data, sizeof (data)); 2391 } 2392 2393 static char * 2394 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) 2395 { 2396 switch (note_type) 2397 { 2398 default: 2399 return NULL; 2400 2401 case NT_PRPSINFO: 2402 { 2403 char data[128]; 2404 va_list ap; 2405 2406 va_start (ap, note_type); 2407 memset (data, 0, sizeof (data)); 2408 strncpy (data + 32, va_arg (ap, const char *), 16); 2409 strncpy (data + 48, va_arg (ap, const char *), 80); 2410 va_end (ap); 2411 return elfcore_write_note (abfd, buf, bufsiz, 2412 "CORE", note_type, data, sizeof (data)); 2413 } 2414 2415 case NT_PRSTATUS: 2416 { 2417 char data[268]; 2418 va_list ap; 2419 long pid; 2420 int cursig; 2421 const void *greg; 2422 2423 va_start (ap, note_type); 2424 memset (data, 0, 72); 2425 pid = va_arg (ap, long); 2426 bfd_put_32 (abfd, pid, data + 24); 2427 cursig = va_arg (ap, int); 2428 bfd_put_16 (abfd, cursig, data + 12); 2429 greg = va_arg (ap, const void *); 2430 memcpy (data + 72, greg, 192); 2431 memset (data + 264, 0, 4); 2432 va_end (ap); 2433 return elfcore_write_note (abfd, buf, bufsiz, 2434 "CORE", note_type, data, sizeof (data)); 2435 } 2436 } 2437 } 2438 2439 static flagword 2440 ppc_elf_lookup_section_flags (char *flag_name) 2441 { 2442 2443 if (!strcmp (flag_name, "SHF_PPC_VLE")) 2444 return SHF_PPC_VLE; 2445 2446 return 0; 2447 } 2448 2449 /* Add the VLE flag if required. */ 2450 2451 bfd_boolean 2452 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr) 2453 { 2454 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle 2455 && (shdr->sh_flags & SHF_EXECINSTR) != 0) 2456 shdr->sh_flags |= SHF_PPC_VLE; 2457 2458 return TRUE; 2459 } 2460 2461 /* Return address for Ith PLT stub in section PLT, for relocation REL 2462 or (bfd_vma) -1 if it should not be included. */ 2463 2464 static bfd_vma 2465 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, 2466 const asection *plt ATTRIBUTE_UNUSED, 2467 const arelent *rel) 2468 { 2469 return rel->address; 2470 } 2471 2472 /* Handle a PowerPC specific section when reading an object file. This 2473 is called when bfd_section_from_shdr finds a section with an unknown 2474 type. */ 2475 2476 static bfd_boolean 2477 ppc_elf_section_from_shdr (bfd *abfd, 2478 Elf_Internal_Shdr *hdr, 2479 const char *name, 2480 int shindex) 2481 { 2482 asection *newsect; 2483 flagword flags; 2484 2485 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 2486 return FALSE; 2487 2488 newsect = hdr->bfd_section; 2489 flags = bfd_get_section_flags (abfd, newsect); 2490 if (hdr->sh_flags & SHF_EXCLUDE) 2491 flags |= SEC_EXCLUDE; 2492 2493 if (hdr->sh_type == SHT_ORDERED) 2494 flags |= SEC_SORT_ENTRIES; 2495 2496 bfd_set_section_flags (abfd, newsect, flags); 2497 return TRUE; 2498 } 2499 2500 /* Set up any other section flags and such that may be necessary. */ 2501 2502 static bfd_boolean 2503 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 2504 Elf_Internal_Shdr *shdr, 2505 asection *asect) 2506 { 2507 if ((asect->flags & SEC_SORT_ENTRIES) != 0) 2508 shdr->sh_type = SHT_ORDERED; 2509 2510 return TRUE; 2511 } 2512 2513 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we 2514 need to bump up the number of section headers. */ 2515 2516 static int 2517 ppc_elf_additional_program_headers (bfd *abfd, 2518 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2519 { 2520 asection *s; 2521 int ret = 0; 2522 2523 s = bfd_get_section_by_name (abfd, ".sbss2"); 2524 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2525 ++ret; 2526 2527 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); 2528 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2529 ++ret; 2530 2531 return ret; 2532 } 2533 2534 /* Modify the segment map for VLE executables. */ 2535 2536 bfd_boolean 2537 ppc_elf_modify_segment_map (bfd *abfd, 2538 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2539 { 2540 struct elf_segment_map *m, *n; 2541 bfd_size_type amt; 2542 unsigned int j, k; 2543 bfd_boolean sect0_vle, sectj_vle; 2544 2545 /* At this point in the link, output sections have already been sorted by 2546 LMA and assigned to segments. All that is left to do is to ensure 2547 there is no mixing of VLE & non-VLE sections in a text segment. 2548 If we find that case, we split the segment. 2549 We maintain the original output section order. */ 2550 2551 for (m = elf_seg_map (abfd); m != NULL; m = m->next) 2552 { 2553 if (m->count == 0) 2554 continue; 2555 2556 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0; 2557 for (j = 1; j < m->count; ++j) 2558 { 2559 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0; 2560 2561 if (sectj_vle != sect0_vle) 2562 break; 2563 } 2564 if (j >= m->count) 2565 continue; 2566 2567 /* sections 0..j-1 stay in this (current) segment, 2568 the remainder are put in a new segment. 2569 The scan resumes with the new segment. */ 2570 2571 /* Fix the new segment. */ 2572 amt = sizeof (struct elf_segment_map); 2573 amt += (m->count - j - 1) * sizeof (asection *); 2574 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt); 2575 if (n == NULL) 2576 return FALSE; 2577 2578 n->p_type = PT_LOAD; 2579 n->p_flags = PF_X | PF_R; 2580 if (sectj_vle) 2581 n->p_flags |= PF_PPC_VLE; 2582 n->count = m->count - j; 2583 for (k = 0; k < n->count; ++k) 2584 { 2585 n->sections[k] = m->sections[j+k]; 2586 m->sections[j+k] = NULL; 2587 } 2588 n->next = m->next; 2589 m->next = n; 2590 2591 /* Fix the current segment */ 2592 m->count = j; 2593 } 2594 2595 return TRUE; 2596 } 2597 2598 /* Add extra PPC sections -- Note, for now, make .sbss2 and 2599 .PPC.EMB.sbss0 a normal section, and not a bss section so 2600 that the linker doesn't crater when trying to make more than 2601 2 sections. */ 2602 2603 static const struct bfd_elf_special_section ppc_elf_special_sections[] = 2604 { 2605 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, 2606 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 2607 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2608 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2609 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2610 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, 2611 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 }, 2612 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2613 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2614 { NULL, 0, 0, 0, 0 } 2615 }; 2616 2617 /* This is what we want for new plt/got. */ 2618 static struct bfd_elf_special_section ppc_alt_plt = 2619 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; 2620 2621 static const struct bfd_elf_special_section * 2622 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 2623 { 2624 const struct bfd_elf_special_section *ssect; 2625 2626 /* See if this is one of the special sections. */ 2627 if (sec->name == NULL) 2628 return NULL; 2629 2630 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, 2631 sec->use_rela_p); 2632 if (ssect != NULL) 2633 { 2634 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) 2635 ssect = &ppc_alt_plt; 2636 return ssect; 2637 } 2638 2639 return _bfd_elf_get_sec_type_attr (abfd, sec); 2640 } 2641 2642 /* Very simple linked list structure for recording apuinfo values. */ 2644 typedef struct apuinfo_list 2645 { 2646 struct apuinfo_list *next; 2647 unsigned long value; 2648 } 2649 apuinfo_list; 2650 2651 static apuinfo_list *head; 2652 static bfd_boolean apuinfo_set; 2653 2654 static void 2655 apuinfo_list_init (void) 2656 { 2657 head = NULL; 2658 apuinfo_set = FALSE; 2659 } 2660 2661 static void 2662 apuinfo_list_add (unsigned long value) 2663 { 2664 apuinfo_list *entry = head; 2665 2666 while (entry != NULL) 2667 { 2668 if (entry->value == value) 2669 return; 2670 entry = entry->next; 2671 } 2672 2673 entry = bfd_malloc (sizeof (* entry)); 2674 if (entry == NULL) 2675 return; 2676 2677 entry->value = value; 2678 entry->next = head; 2679 head = entry; 2680 } 2681 2682 static unsigned 2683 apuinfo_list_length (void) 2684 { 2685 apuinfo_list *entry; 2686 unsigned long count; 2687 2688 for (entry = head, count = 0; 2689 entry; 2690 entry = entry->next) 2691 ++ count; 2692 2693 return count; 2694 } 2695 2696 static inline unsigned long 2697 apuinfo_list_element (unsigned long number) 2698 { 2699 apuinfo_list * entry; 2700 2701 for (entry = head; 2702 entry && number --; 2703 entry = entry->next) 2704 ; 2705 2706 return entry ? entry->value : 0; 2707 } 2708 2709 static void 2710 apuinfo_list_finish (void) 2711 { 2712 apuinfo_list *entry; 2713 2714 for (entry = head; entry;) 2715 { 2716 apuinfo_list *next = entry->next; 2717 free (entry); 2718 entry = next; 2719 } 2720 2721 head = NULL; 2722 } 2723 2724 /* Scan the input BFDs and create a linked list of 2725 the APUinfo values that will need to be emitted. */ 2726 2727 static void 2728 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) 2729 { 2730 bfd *ibfd; 2731 asection *asec; 2732 char *buffer = NULL; 2733 bfd_size_type largest_input_size = 0; 2734 unsigned i; 2735 unsigned long length; 2736 const char *error_message = NULL; 2737 2738 if (link_info == NULL) 2739 return; 2740 2741 apuinfo_list_init (); 2742 2743 /* Read in the input sections contents. */ 2744 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next) 2745 { 2746 unsigned long datum; 2747 2748 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 2749 if (asec == NULL) 2750 continue; 2751 2752 error_message = _("corrupt %s section in %B"); 2753 length = asec->size; 2754 if (length < 20) 2755 goto fail; 2756 2757 apuinfo_set = TRUE; 2758 if (largest_input_size < asec->size) 2759 { 2760 if (buffer) 2761 free (buffer); 2762 largest_input_size = asec->size; 2763 buffer = bfd_malloc (largest_input_size); 2764 if (!buffer) 2765 return; 2766 } 2767 2768 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 2769 || (bfd_bread (buffer, length, ibfd) != length)) 2770 { 2771 error_message = _("unable to read in %s section from %B"); 2772 goto fail; 2773 } 2774 2775 /* Verify the contents of the header. Note - we have to 2776 extract the values this way in order to allow for a 2777 host whose endian-ness is different from the target. */ 2778 datum = bfd_get_32 (ibfd, buffer); 2779 if (datum != sizeof APUINFO_LABEL) 2780 goto fail; 2781 2782 datum = bfd_get_32 (ibfd, buffer + 8); 2783 if (datum != 0x2) 2784 goto fail; 2785 2786 if (strcmp (buffer + 12, APUINFO_LABEL) != 0) 2787 goto fail; 2788 2789 /* Get the number of bytes used for apuinfo entries. */ 2790 datum = bfd_get_32 (ibfd, buffer + 4); 2791 if (datum + 20 != length) 2792 goto fail; 2793 2794 /* Scan the apuinfo section, building a list of apuinfo numbers. */ 2795 for (i = 0; i < datum; i += 4) 2796 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i)); 2797 } 2798 2799 error_message = NULL; 2800 2801 if (apuinfo_set) 2802 { 2803 /* Compute the size of the output section. */ 2804 unsigned num_entries = apuinfo_list_length (); 2805 2806 /* Set the output section size, if it exists. */ 2807 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2808 2809 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4)) 2810 { 2811 ibfd = abfd; 2812 error_message = _("warning: unable to set size of %s section in %B"); 2813 } 2814 } 2815 2816 fail: 2817 if (buffer) 2818 free (buffer); 2819 2820 if (error_message) 2821 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); 2822 } 2823 2824 /* Prevent the output section from accumulating the input sections' 2825 contents. We have already stored this in our linked list structure. */ 2826 2827 static bfd_boolean 2828 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, 2829 struct bfd_link_info *link_info ATTRIBUTE_UNUSED, 2830 asection *asec, 2831 bfd_byte *contents ATTRIBUTE_UNUSED) 2832 { 2833 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0; 2834 } 2835 2836 /* Finally we can generate the output section. */ 2837 2838 static void 2839 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) 2840 { 2841 bfd_byte *buffer; 2842 asection *asec; 2843 unsigned i; 2844 unsigned num_entries; 2845 bfd_size_type length; 2846 2847 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2848 if (asec == NULL) 2849 return; 2850 2851 if (!apuinfo_set) 2852 return; 2853 2854 length = asec->size; 2855 if (length < 20) 2856 return; 2857 2858 buffer = bfd_malloc (length); 2859 if (buffer == NULL) 2860 { 2861 (*_bfd_error_handler) 2862 (_("failed to allocate space for new APUinfo section.")); 2863 return; 2864 } 2865 2866 /* Create the apuinfo header. */ 2867 num_entries = apuinfo_list_length (); 2868 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); 2869 bfd_put_32 (abfd, num_entries * 4, buffer + 4); 2870 bfd_put_32 (abfd, 0x2, buffer + 8); 2871 strcpy ((char *) buffer + 12, APUINFO_LABEL); 2872 2873 length = 20; 2874 for (i = 0; i < num_entries; i++) 2875 { 2876 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); 2877 length += 4; 2878 } 2879 2880 if (length != asec->size) 2881 (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); 2882 2883 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) 2884 (*_bfd_error_handler) (_("failed to install new APUinfo section.")); 2885 2886 free (buffer); 2887 2888 apuinfo_list_finish (); 2889 } 2890 2891 static bfd_boolean 2893 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off) 2894 { 2895 bfd_byte buf[GLINK_ENTRY_SIZE]; 2896 2897 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE)) 2898 return FALSE; 2899 2900 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11 2901 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11 2902 && bfd_get_32 (abfd, buf + 8) == MTCTR_11 2903 && bfd_get_32 (abfd, buf + 12) == BCTR); 2904 } 2905 2906 static bfd_boolean 2907 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) 2908 { 2909 bfd_vma vma = *(bfd_vma *) ptr; 2910 return ((section->flags & SEC_ALLOC) != 0 2911 && section->vma <= vma 2912 && vma < section->vma + section->size); 2913 } 2914 2915 static long 2916 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms, 2917 long dynsymcount, asymbol **dynsyms, 2918 asymbol **ret) 2919 { 2920 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); 2921 asection *plt, *relplt, *dynamic, *glink; 2922 bfd_vma glink_vma = 0; 2923 bfd_vma resolv_vma = 0; 2924 bfd_vma stub_vma; 2925 asymbol *s; 2926 arelent *p; 2927 long count, i; 2928 size_t size; 2929 char *names; 2930 bfd_byte buf[4]; 2931 2932 *ret = NULL; 2933 2934 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) 2935 return 0; 2936 2937 if (dynsymcount <= 0) 2938 return 0; 2939 2940 relplt = bfd_get_section_by_name (abfd, ".rela.plt"); 2941 if (relplt == NULL) 2942 return 0; 2943 2944 plt = bfd_get_section_by_name (abfd, ".plt"); 2945 if (plt == NULL) 2946 return 0; 2947 2948 /* Call common code to handle old-style executable PLTs. */ 2949 if (elf_section_flags (plt) & SHF_EXECINSTR) 2950 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, 2951 dynsymcount, dynsyms, ret); 2952 2953 /* If this object was prelinked, the prelinker stored the address 2954 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */ 2955 dynamic = bfd_get_section_by_name (abfd, ".dynamic"); 2956 if (dynamic != NULL) 2957 { 2958 bfd_byte *dynbuf, *extdyn, *extdynend; 2959 size_t extdynsize; 2960 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); 2961 2962 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) 2963 return -1; 2964 2965 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; 2966 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; 2967 2968 extdyn = dynbuf; 2969 extdynend = extdyn + dynamic->size; 2970 for (; extdyn < extdynend; extdyn += extdynsize) 2971 { 2972 Elf_Internal_Dyn dyn; 2973 (*swap_dyn_in) (abfd, extdyn, &dyn); 2974 2975 if (dyn.d_tag == DT_NULL) 2976 break; 2977 2978 if (dyn.d_tag == DT_PPC_GOT) 2979 { 2980 unsigned int g_o_t = dyn.d_un.d_val; 2981 asection *got = bfd_get_section_by_name (abfd, ".got"); 2982 if (got != NULL 2983 && bfd_get_section_contents (abfd, got, buf, 2984 g_o_t - got->vma + 4, 4)) 2985 glink_vma = bfd_get_32 (abfd, buf); 2986 break; 2987 } 2988 } 2989 free (dynbuf); 2990 } 2991 2992 /* Otherwise we read the first plt entry. */ 2993 if (glink_vma == 0) 2994 { 2995 if (bfd_get_section_contents (abfd, plt, buf, 0, 4)) 2996 glink_vma = bfd_get_32 (abfd, buf); 2997 } 2998 2999 if (glink_vma == 0) 3000 return 0; 3001 3002 /* The .glink section usually does not survive the final 3003 link; search for the section (usually .text) where the 3004 glink stubs now reside. */ 3005 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma); 3006 if (glink == NULL) 3007 return 0; 3008 3009 /* Determine glink PLT resolver by reading the relative branch 3010 from the first glink stub. */ 3011 if (bfd_get_section_contents (abfd, glink, buf, 3012 glink_vma - glink->vma, 4)) 3013 { 3014 unsigned int insn = bfd_get_32 (abfd, buf); 3015 3016 /* The first glink stub may either branch to the resolver ... */ 3017 insn ^= B; 3018 if ((insn & ~0x3fffffc) == 0) 3019 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000; 3020 3021 /* ... or fall through a bunch of NOPs. */ 3022 else if ((insn ^ B ^ NOP) == 0) 3023 for (i = 4; 3024 bfd_get_section_contents (abfd, glink, buf, 3025 glink_vma - glink->vma + i, 4); 3026 i += 4) 3027 if (bfd_get_32 (abfd, buf) != NOP) 3028 { 3029 resolv_vma = glink_vma + i; 3030 break; 3031 } 3032 } 3033 3034 count = relplt->size / sizeof (Elf32_External_Rela); 3035 /* If the stubs are those for -shared/-pie then we might have 3036 multiple stubs for each plt entry. If that is the case then 3037 there is no way to associate stubs with their plt entries short 3038 of figuring out the GOT pointer value used in the stub. */ 3039 if (!is_nonpic_glink_stub (abfd, glink, 3040 glink_vma - GLINK_ENTRY_SIZE - glink->vma)) 3041 return 0; 3042 3043 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; 3044 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) 3045 return -1; 3046 3047 size = count * sizeof (asymbol); 3048 p = relplt->relocation; 3049 for (i = 0; i < count; i++, p++) 3050 { 3051 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); 3052 if (p->addend != 0) 3053 size += sizeof ("+0x") - 1 + 8; 3054 } 3055 3056 size += sizeof (asymbol) + sizeof ("__glink"); 3057 3058 if (resolv_vma) 3059 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); 3060 3061 s = *ret = bfd_malloc (size); 3062 if (s == NULL) 3063 return -1; 3064 3065 stub_vma = glink_vma; 3066 names = (char *) (s + count + 1 + (resolv_vma != 0)); 3067 p = relplt->relocation + count - 1; 3068 for (i = 0; i < count; i++) 3069 { 3070 size_t len; 3071 3072 *s = **p->sym_ptr_ptr; 3073 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since 3074 we are defining a symbol, ensure one of them is set. */ 3075 if ((s->flags & BSF_LOCAL) == 0) 3076 s->flags |= BSF_GLOBAL; 3077 s->flags |= BSF_SYNTHETIC; 3078 s->section = glink; 3079 stub_vma -= 16; 3080 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0) 3081 stub_vma -= 32; 3082 s->value = stub_vma - glink->vma; 3083 s->name = names; 3084 s->udata.p = NULL; 3085 len = strlen ((*p->sym_ptr_ptr)->name); 3086 memcpy (names, (*p->sym_ptr_ptr)->name, len); 3087 names += len; 3088 if (p->addend != 0) 3089 { 3090 memcpy (names, "+0x", sizeof ("+0x") - 1); 3091 names += sizeof ("+0x") - 1; 3092 bfd_sprintf_vma (abfd, names, p->addend); 3093 names += strlen (names); 3094 } 3095 memcpy (names, "@plt", sizeof ("@plt")); 3096 names += sizeof ("@plt"); 3097 ++s; 3098 --p; 3099 } 3100 3101 /* Add a symbol at the start of the glink branch table. */ 3102 memset (s, 0, sizeof *s); 3103 s->the_bfd = abfd; 3104 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 3105 s->section = glink; 3106 s->value = glink_vma - glink->vma; 3107 s->name = names; 3108 memcpy (names, "__glink", sizeof ("__glink")); 3109 names += sizeof ("__glink"); 3110 s++; 3111 count++; 3112 3113 if (resolv_vma) 3114 { 3115 /* Add a symbol for the glink PLT resolver. */ 3116 memset (s, 0, sizeof *s); 3117 s->the_bfd = abfd; 3118 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 3119 s->section = glink; 3120 s->value = resolv_vma - glink->vma; 3121 s->name = names; 3122 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); 3123 names += sizeof ("__glink_PLTresolve"); 3124 s++; 3125 count++; 3126 } 3127 3128 return count; 3129 } 3130 3131 /* The following functions are specific to the ELF linker, while 3133 functions above are used generally. They appear in this file more 3134 or less in the order in which they are called. eg. 3135 ppc_elf_check_relocs is called early in the link process, 3136 ppc_elf_finish_dynamic_sections is one of the last functions 3137 called. */ 3138 3139 /* Track PLT entries needed for a given symbol. We might need more 3140 than one glink entry per symbol when generating a pic binary. */ 3141 struct plt_entry 3142 { 3143 struct plt_entry *next; 3144 3145 /* -fPIC uses multiple GOT sections, one per file, called ".got2". 3146 This field stores the offset into .got2 used to initialise the 3147 GOT pointer reg. It will always be at least 32768. (Current 3148 gcc always uses an offset of 32768, but ld -r will pack .got2 3149 sections together resulting in larger offsets). */ 3150 bfd_vma addend; 3151 3152 /* The .got2 section. */ 3153 asection *sec; 3154 3155 /* PLT refcount or offset. */ 3156 union 3157 { 3158 bfd_signed_vma refcount; 3159 bfd_vma offset; 3160 } plt; 3161 3162 /* .glink stub offset. */ 3163 bfd_vma glink_offset; 3164 }; 3165 3166 /* Of those relocs that might be copied as dynamic relocs, this function 3167 selects those that must be copied when linking a shared library, 3168 even when the symbol is local. */ 3169 3170 static int 3171 must_be_dyn_reloc (struct bfd_link_info *info, 3172 enum elf_ppc_reloc_type r_type) 3173 { 3174 switch (r_type) 3175 { 3176 default: 3177 return 1; 3178 3179 case R_PPC_REL24: 3180 case R_PPC_REL14: 3181 case R_PPC_REL14_BRTAKEN: 3182 case R_PPC_REL14_BRNTAKEN: 3183 case R_PPC_REL32: 3184 return 0; 3185 3186 case R_PPC_TPREL32: 3187 case R_PPC_TPREL16: 3188 case R_PPC_TPREL16_LO: 3189 case R_PPC_TPREL16_HI: 3190 case R_PPC_TPREL16_HA: 3191 return !bfd_link_executable (info); 3192 } 3193 } 3194 3195 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 3196 copying dynamic variables from a shared lib into an app's dynbss 3197 section, and instead use a dynamic relocation to point into the 3198 shared lib. */ 3199 #define ELIMINATE_COPY_RELOCS 1 3200 3201 /* Used to track dynamic relocations for local symbols. */ 3202 struct ppc_dyn_relocs 3203 { 3204 struct ppc_dyn_relocs *next; 3205 3206 /* The input section of the reloc. */ 3207 asection *sec; 3208 3209 /* Total number of relocs copied for the input section. */ 3210 unsigned int count : 31; 3211 3212 /* Whether this entry is for STT_GNU_IFUNC symbols. */ 3213 unsigned int ifunc : 1; 3214 }; 3215 3216 /* PPC ELF linker hash entry. */ 3217 3218 struct ppc_elf_link_hash_entry 3219 { 3220 struct elf_link_hash_entry elf; 3221 3222 /* If this symbol is used in the linker created sections, the processor 3223 specific backend uses this field to map the field into the offset 3224 from the beginning of the section. */ 3225 elf_linker_section_pointers_t *linker_section_pointer; 3226 3227 /* Track dynamic relocs copied for this symbol. */ 3228 struct elf_dyn_relocs *dyn_relocs; 3229 3230 /* Contexts in which symbol is used in the GOT (or TOC). 3231 TLS_GD .. TLS_TLS bits are or'd into the mask as the 3232 corresponding relocs are encountered during check_relocs. 3233 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 3234 indicate the corresponding GOT entry type is not needed. */ 3235 #define TLS_GD 1 /* GD reloc. */ 3236 #define TLS_LD 2 /* LD reloc. */ 3237 #define TLS_TPREL 4 /* TPREL reloc, => IE. */ 3238 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 3239 #define TLS_TLS 16 /* Any TLS reloc. */ 3240 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ 3241 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */ 3242 char tls_mask; 3243 3244 /* Nonzero if we have seen a small data relocation referring to this 3245 symbol. */ 3246 unsigned char has_sda_refs : 1; 3247 3248 /* Flag use of given relocations. */ 3249 unsigned char has_addr16_ha : 1; 3250 unsigned char has_addr16_lo : 1; 3251 }; 3252 3253 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) 3254 3255 /* PPC ELF linker hash table. */ 3256 3257 struct ppc_elf_link_hash_table 3258 { 3259 struct elf_link_hash_table elf; 3260 3261 /* Various options passed from the linker. */ 3262 struct ppc_elf_params *params; 3263 3264 /* Short-cuts to get to dynamic linker sections. */ 3265 asection *got; 3266 asection *relgot; 3267 asection *glink; 3268 asection *plt; 3269 asection *relplt; 3270 asection *iplt; 3271 asection *reliplt; 3272 asection *dynbss; 3273 asection *relbss; 3274 asection *dynsbss; 3275 asection *relsbss; 3276 elf_linker_section_t sdata[2]; 3277 asection *sbss; 3278 asection *glink_eh_frame; 3279 3280 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ 3281 asection *srelplt2; 3282 3283 /* The .got.plt section (VxWorks only)*/ 3284 asection *sgotplt; 3285 3286 /* Shortcut to __tls_get_addr. */ 3287 struct elf_link_hash_entry *tls_get_addr; 3288 3289 /* The bfd that forced an old-style PLT. */ 3290 bfd *old_bfd; 3291 3292 /* TLS local dynamic got entry handling. */ 3293 union { 3294 bfd_signed_vma refcount; 3295 bfd_vma offset; 3296 } tlsld_got; 3297 3298 /* Offset of branch table to PltResolve function in glink. */ 3299 bfd_vma glink_pltresolve; 3300 3301 /* Size of reserved GOT entries. */ 3302 unsigned int got_header_size; 3303 /* Non-zero if allocating the header left a gap. */ 3304 unsigned int got_gap; 3305 3306 /* The type of PLT we have chosen to use. */ 3307 enum ppc_elf_plt_type plt_type; 3308 3309 /* True if the target system is VxWorks. */ 3310 unsigned int is_vxworks:1; 3311 3312 /* The size of PLT entries. */ 3313 int plt_entry_size; 3314 /* The distance between adjacent PLT slots. */ 3315 int plt_slot_size; 3316 /* The size of the first PLT entry. */ 3317 int plt_initial_entry_size; 3318 3319 /* Small local sym cache. */ 3320 struct sym_cache sym_cache; 3321 }; 3322 3323 /* Rename some of the generic section flags to better document how they 3324 are used for ppc32. The flags are only valid for ppc32 elf objects. */ 3325 3326 /* Nonzero if this section has TLS related relocations. */ 3327 #define has_tls_reloc sec_flg0 3328 3329 /* Nonzero if this section has a call to __tls_get_addr. */ 3330 #define has_tls_get_addr_call sec_flg1 3331 3332 /* Get the PPC ELF linker hash table from a link_info structure. */ 3333 3334 #define ppc_elf_hash_table(p) \ 3335 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 3336 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL) 3337 3338 /* Create an entry in a PPC ELF linker hash table. */ 3339 3340 static struct bfd_hash_entry * 3341 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 3342 struct bfd_hash_table *table, 3343 const char *string) 3344 { 3345 /* Allocate the structure if it has not already been allocated by a 3346 subclass. */ 3347 if (entry == NULL) 3348 { 3349 entry = bfd_hash_allocate (table, 3350 sizeof (struct ppc_elf_link_hash_entry)); 3351 if (entry == NULL) 3352 return entry; 3353 } 3354 3355 /* Call the allocation method of the superclass. */ 3356 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 3357 if (entry != NULL) 3358 { 3359 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; 3360 ppc_elf_hash_entry (entry)->dyn_relocs = NULL; 3361 ppc_elf_hash_entry (entry)->tls_mask = 0; 3362 ppc_elf_hash_entry (entry)->has_sda_refs = 0; 3363 } 3364 3365 return entry; 3366 } 3367 3368 /* Create a PPC ELF linker hash table. */ 3369 3370 static struct bfd_link_hash_table * 3371 ppc_elf_link_hash_table_create (bfd *abfd) 3372 { 3373 struct ppc_elf_link_hash_table *ret; 3374 static struct ppc_elf_params default_params 3375 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0 }; 3376 3377 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); 3378 if (ret == NULL) 3379 return NULL; 3380 3381 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, 3382 ppc_elf_link_hash_newfunc, 3383 sizeof (struct ppc_elf_link_hash_entry), 3384 PPC32_ELF_DATA)) 3385 { 3386 free (ret); 3387 return NULL; 3388 } 3389 3390 ret->elf.init_plt_refcount.refcount = 0; 3391 ret->elf.init_plt_refcount.glist = NULL; 3392 ret->elf.init_plt_offset.offset = 0; 3393 ret->elf.init_plt_offset.glist = NULL; 3394 3395 ret->params = &default_params; 3396 3397 ret->sdata[0].name = ".sdata"; 3398 ret->sdata[0].sym_name = "_SDA_BASE_"; 3399 ret->sdata[0].bss_name = ".sbss"; 3400 3401 ret->sdata[1].name = ".sdata2"; 3402 ret->sdata[1].sym_name = "_SDA2_BASE_"; 3403 ret->sdata[1].bss_name = ".sbss2"; 3404 3405 ret->plt_entry_size = 12; 3406 ret->plt_slot_size = 8; 3407 ret->plt_initial_entry_size = 72; 3408 3409 return &ret->elf.root; 3410 } 3411 3412 /* Hook linker params into hash table. */ 3413 3414 void 3415 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params) 3416 { 3417 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3418 3419 if (htab) 3420 htab->params = params; 3421 params->pagesize_p2 = bfd_log2 (params->pagesize); 3422 } 3423 3424 /* Create .got and the related sections. */ 3425 3426 static bfd_boolean 3427 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) 3428 { 3429 struct ppc_elf_link_hash_table *htab; 3430 asection *s; 3431 flagword flags; 3432 3433 if (!_bfd_elf_create_got_section (abfd, info)) 3434 return FALSE; 3435 3436 htab = ppc_elf_hash_table (info); 3437 htab->got = s = bfd_get_linker_section (abfd, ".got"); 3438 if (s == NULL) 3439 abort (); 3440 3441 if (htab->is_vxworks) 3442 { 3443 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt"); 3444 if (!htab->sgotplt) 3445 abort (); 3446 } 3447 else 3448 { 3449 /* The powerpc .got has a blrl instruction in it. Mark it 3450 executable. */ 3451 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS 3452 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3453 if (!bfd_set_section_flags (abfd, s, flags)) 3454 return FALSE; 3455 } 3456 3457 htab->relgot = bfd_get_linker_section (abfd, ".rela.got"); 3458 if (!htab->relgot) 3459 abort (); 3460 3461 return TRUE; 3462 } 3463 3464 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and 3465 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata 3466 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */ 3467 3468 static bfd_boolean 3469 ppc_elf_create_linker_section (bfd *abfd, 3470 struct bfd_link_info *info, 3471 flagword flags, 3472 elf_linker_section_t *lsect) 3473 { 3474 asection *s; 3475 3476 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3477 | SEC_LINKER_CREATED); 3478 3479 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags); 3480 if (s == NULL) 3481 return FALSE; 3482 lsect->section = s; 3483 3484 /* Define the sym on the first section of this name. */ 3485 s = bfd_get_section_by_name (abfd, lsect->name); 3486 3487 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name); 3488 if (lsect->sym == NULL) 3489 return FALSE; 3490 lsect->sym->root.u.def.value = 0x8000; 3491 return TRUE; 3492 } 3493 3494 static bfd_boolean 3495 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info) 3496 { 3497 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3498 asection *s; 3499 flagword flags; 3500 3501 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS 3502 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3503 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags); 3504 htab->glink = s; 3505 if (s == NULL 3506 || !bfd_set_section_alignment (abfd, s, 3507 htab->params->ppc476_workaround ? 6 : 4)) 3508 return FALSE; 3509 3510 if (!info->no_ld_generated_unwind_info) 3511 { 3512 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3513 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3514 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags); 3515 htab->glink_eh_frame = s; 3516 if (s == NULL 3517 || !bfd_set_section_alignment (abfd, s, 2)) 3518 return FALSE; 3519 } 3520 3521 flags = SEC_ALLOC | SEC_LINKER_CREATED; 3522 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags); 3523 htab->iplt = s; 3524 if (s == NULL 3525 || !bfd_set_section_alignment (abfd, s, 4)) 3526 return FALSE; 3527 3528 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3529 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3530 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags); 3531 htab->reliplt = s; 3532 if (s == NULL 3533 || ! bfd_set_section_alignment (abfd, s, 2)) 3534 return FALSE; 3535 3536 if (!ppc_elf_create_linker_section (abfd, info, 0, 3537 &htab->sdata[0])) 3538 return FALSE; 3539 3540 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY, 3541 &htab->sdata[1])) 3542 return FALSE; 3543 3544 return TRUE; 3545 } 3546 3547 /* We have to create .dynsbss and .rela.sbss here so that they get mapped 3548 to output sections (just like _bfd_elf_create_dynamic_sections has 3549 to create .dynbss and .rela.bss). */ 3550 3551 static bfd_boolean 3552 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 3553 { 3554 struct ppc_elf_link_hash_table *htab; 3555 asection *s; 3556 flagword flags; 3557 3558 htab = ppc_elf_hash_table (info); 3559 3560 if (htab->got == NULL 3561 && !ppc_elf_create_got (abfd, info)) 3562 return FALSE; 3563 3564 if (!_bfd_elf_create_dynamic_sections (abfd, info)) 3565 return FALSE; 3566 3567 if (htab->glink == NULL 3568 && !ppc_elf_create_glink (abfd, info)) 3569 return FALSE; 3570 3571 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss"); 3572 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss", 3573 SEC_ALLOC | SEC_LINKER_CREATED); 3574 htab->dynsbss = s; 3575 if (s == NULL) 3576 return FALSE; 3577 3578 if (! bfd_link_pic (info)) 3579 { 3580 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss"); 3581 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3582 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3583 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags); 3584 htab->relsbss = s; 3585 if (s == NULL 3586 || ! bfd_set_section_alignment (abfd, s, 2)) 3587 return FALSE; 3588 } 3589 3590 if (htab->is_vxworks 3591 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) 3592 return FALSE; 3593 3594 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt"); 3595 htab->plt = s = bfd_get_linker_section (abfd, ".plt"); 3596 if (s == NULL) 3597 abort (); 3598 3599 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; 3600 if (htab->plt_type == PLT_VXWORKS) 3601 /* The VxWorks PLT is a loaded section with contents. */ 3602 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; 3603 return bfd_set_section_flags (abfd, s, flags); 3604 } 3605 3606 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 3607 3608 static void 3609 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, 3610 struct elf_link_hash_entry *dir, 3611 struct elf_link_hash_entry *ind) 3612 { 3613 struct ppc_elf_link_hash_entry *edir, *eind; 3614 3615 edir = (struct ppc_elf_link_hash_entry *) dir; 3616 eind = (struct ppc_elf_link_hash_entry *) ind; 3617 3618 edir->tls_mask |= eind->tls_mask; 3619 edir->has_sda_refs |= eind->has_sda_refs; 3620 3621 /* If called to transfer flags for a weakdef during processing 3622 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 3623 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 3624 if (!(ELIMINATE_COPY_RELOCS 3625 && eind->elf.root.type != bfd_link_hash_indirect 3626 && edir->elf.dynamic_adjusted)) 3627 edir->elf.non_got_ref |= eind->elf.non_got_ref; 3628 3629 edir->elf.ref_dynamic |= eind->elf.ref_dynamic; 3630 edir->elf.ref_regular |= eind->elf.ref_regular; 3631 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; 3632 edir->elf.needs_plt |= eind->elf.needs_plt; 3633 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; 3634 3635 if (eind->dyn_relocs != NULL) 3636 { 3637 if (edir->dyn_relocs != NULL) 3638 { 3639 struct elf_dyn_relocs **pp; 3640 struct elf_dyn_relocs *p; 3641 3642 /* Add reloc counts against the indirect sym to the direct sym 3643 list. Merge any entries against the same section. */ 3644 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 3645 { 3646 struct elf_dyn_relocs *q; 3647 3648 for (q = edir->dyn_relocs; q != NULL; q = q->next) 3649 if (q->sec == p->sec) 3650 { 3651 q->pc_count += p->pc_count; 3652 q->count += p->count; 3653 *pp = p->next; 3654 break; 3655 } 3656 if (q == NULL) 3657 pp = &p->next; 3658 } 3659 *pp = edir->dyn_relocs; 3660 } 3661 3662 edir->dyn_relocs = eind->dyn_relocs; 3663 eind->dyn_relocs = NULL; 3664 } 3665 3666 /* If we were called to copy over info for a weak sym, that's all. 3667 You might think dyn_relocs need not be copied over; After all, 3668 both syms will be dynamic or both non-dynamic so we're just 3669 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS 3670 code in ppc_elf_adjust_dynamic_symbol needs to check for 3671 dyn_relocs in read-only sections, and it does so on what is the 3672 DIR sym here. */ 3673 if (eind->elf.root.type != bfd_link_hash_indirect) 3674 return; 3675 3676 /* Copy over the GOT refcount entries that we may have already seen to 3677 the symbol which just became indirect. */ 3678 edir->elf.got.refcount += eind->elf.got.refcount; 3679 eind->elf.got.refcount = 0; 3680 3681 /* And plt entries. */ 3682 if (eind->elf.plt.plist != NULL) 3683 { 3684 if (edir->elf.plt.plist != NULL) 3685 { 3686 struct plt_entry **entp; 3687 struct plt_entry *ent; 3688 3689 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) 3690 { 3691 struct plt_entry *dent; 3692 3693 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) 3694 if (dent->sec == ent->sec && dent->addend == ent->addend) 3695 { 3696 dent->plt.refcount += ent->plt.refcount; 3697 *entp = ent->next; 3698 break; 3699 } 3700 if (dent == NULL) 3701 entp = &ent->next; 3702 } 3703 *entp = edir->elf.plt.plist; 3704 } 3705 3706 edir->elf.plt.plist = eind->elf.plt.plist; 3707 eind->elf.plt.plist = NULL; 3708 } 3709 3710 if (eind->elf.dynindx != -1) 3711 { 3712 if (edir->elf.dynindx != -1) 3713 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 3714 edir->elf.dynstr_index); 3715 edir->elf.dynindx = eind->elf.dynindx; 3716 edir->elf.dynstr_index = eind->elf.dynstr_index; 3717 eind->elf.dynindx = -1; 3718 eind->elf.dynstr_index = 0; 3719 } 3720 } 3721 3722 /* Hook called by the linker routine which adds symbols from an object 3723 file. We use it to put .comm items in .sbss, and not .bss. */ 3724 3725 static bfd_boolean 3726 ppc_elf_add_symbol_hook (bfd *abfd, 3727 struct bfd_link_info *info, 3728 Elf_Internal_Sym *sym, 3729 const char **namep ATTRIBUTE_UNUSED, 3730 flagword *flagsp ATTRIBUTE_UNUSED, 3731 asection **secp, 3732 bfd_vma *valp) 3733 { 3734 if (sym->st_shndx == SHN_COMMON 3735 && !bfd_link_relocatable (info) 3736 && is_ppc_elf (info->output_bfd) 3737 && sym->st_size <= elf_gp_size (abfd)) 3738 { 3739 /* Common symbols less than or equal to -G nn bytes are automatically 3740 put into .sbss. */ 3741 struct ppc_elf_link_hash_table *htab; 3742 3743 htab = ppc_elf_hash_table (info); 3744 if (htab->sbss == NULL) 3745 { 3746 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; 3747 3748 if (!htab->elf.dynobj) 3749 htab->elf.dynobj = abfd; 3750 3751 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 3752 ".sbss", 3753 flags); 3754 if (htab->sbss == NULL) 3755 return FALSE; 3756 } 3757 3758 *secp = htab->sbss; 3759 *valp = sym->st_size; 3760 } 3761 3762 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC 3763 && (abfd->flags & DYNAMIC) == 0 3764 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) 3765 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; 3766 3767 return TRUE; 3768 } 3769 3770 /* Find a linker generated pointer with a given addend and type. */ 3772 3773 static elf_linker_section_pointers_t * 3774 elf_find_pointer_linker_section 3775 (elf_linker_section_pointers_t *linker_pointers, 3776 bfd_vma addend, 3777 elf_linker_section_t *lsect) 3778 { 3779 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) 3780 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) 3781 return linker_pointers; 3782 3783 return NULL; 3784 } 3785 3786 /* Allocate a pointer to live in a linker created section. */ 3787 3788 static bfd_boolean 3789 elf_allocate_pointer_linker_section (bfd *abfd, 3790 elf_linker_section_t *lsect, 3791 struct elf_link_hash_entry *h, 3792 const Elf_Internal_Rela *rel) 3793 { 3794 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; 3795 elf_linker_section_pointers_t *linker_section_ptr; 3796 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 3797 bfd_size_type amt; 3798 3799 BFD_ASSERT (lsect != NULL); 3800 3801 /* Is this a global symbol? */ 3802 if (h != NULL) 3803 { 3804 struct ppc_elf_link_hash_entry *eh; 3805 3806 /* Has this symbol already been allocated? If so, our work is done. */ 3807 eh = (struct ppc_elf_link_hash_entry *) h; 3808 if (elf_find_pointer_linker_section (eh->linker_section_pointer, 3809 rel->r_addend, 3810 lsect)) 3811 return TRUE; 3812 3813 ptr_linker_section_ptr = &eh->linker_section_pointer; 3814 } 3815 else 3816 { 3817 BFD_ASSERT (is_ppc_elf (abfd)); 3818 3819 /* Allocation of a pointer to a local symbol. */ 3820 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); 3821 3822 /* Allocate a table to hold the local symbols if first time. */ 3823 if (!ptr) 3824 { 3825 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info; 3826 3827 amt = num_symbols; 3828 amt *= sizeof (elf_linker_section_pointers_t *); 3829 ptr = bfd_zalloc (abfd, amt); 3830 3831 if (!ptr) 3832 return FALSE; 3833 3834 elf_local_ptr_offsets (abfd) = ptr; 3835 } 3836 3837 /* Has this symbol already been allocated? If so, our work is done. */ 3838 if (elf_find_pointer_linker_section (ptr[r_symndx], 3839 rel->r_addend, 3840 lsect)) 3841 return TRUE; 3842 3843 ptr_linker_section_ptr = &ptr[r_symndx]; 3844 } 3845 3846 /* Allocate space for a pointer in the linker section, and allocate 3847 a new pointer record from internal memory. */ 3848 BFD_ASSERT (ptr_linker_section_ptr != NULL); 3849 amt = sizeof (elf_linker_section_pointers_t); 3850 linker_section_ptr = bfd_alloc (abfd, amt); 3851 3852 if (!linker_section_ptr) 3853 return FALSE; 3854 3855 linker_section_ptr->next = *ptr_linker_section_ptr; 3856 linker_section_ptr->addend = rel->r_addend; 3857 linker_section_ptr->lsect = lsect; 3858 *ptr_linker_section_ptr = linker_section_ptr; 3859 3860 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2)) 3861 return FALSE; 3862 linker_section_ptr->offset = lsect->section->size; 3863 lsect->section->size += 4; 3864 3865 #ifdef DEBUG 3866 fprintf (stderr, 3867 "Create pointer in linker section %s, offset = %ld, section size = %ld\n", 3868 lsect->name, (long) linker_section_ptr->offset, 3869 (long) lsect->section->size); 3870 #endif 3871 3872 return TRUE; 3873 } 3874 3875 static struct plt_entry ** 3876 update_local_sym_info (bfd *abfd, 3877 Elf_Internal_Shdr *symtab_hdr, 3878 unsigned long r_symndx, 3879 int tls_type) 3880 { 3881 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 3882 struct plt_entry **local_plt; 3883 char *local_got_tls_masks; 3884 3885 if (local_got_refcounts == NULL) 3886 { 3887 bfd_size_type size = symtab_hdr->sh_info; 3888 3889 size *= (sizeof (*local_got_refcounts) 3890 + sizeof (*local_plt) 3891 + sizeof (*local_got_tls_masks)); 3892 local_got_refcounts = bfd_zalloc (abfd, size); 3893 if (local_got_refcounts == NULL) 3894 return NULL; 3895 elf_local_got_refcounts (abfd) = local_got_refcounts; 3896 } 3897 3898 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info); 3899 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info); 3900 local_got_tls_masks[r_symndx] |= tls_type; 3901 if (tls_type != PLT_IFUNC) 3902 local_got_refcounts[r_symndx] += 1; 3903 return local_plt + r_symndx; 3904 } 3905 3906 static bfd_boolean 3907 update_plt_info (bfd *abfd, struct plt_entry **plist, 3908 asection *sec, bfd_vma addend) 3909 { 3910 struct plt_entry *ent; 3911 3912 if (addend < 32768) 3913 sec = NULL; 3914 for (ent = *plist; ent != NULL; ent = ent->next) 3915 if (ent->sec == sec && ent->addend == addend) 3916 break; 3917 if (ent == NULL) 3918 { 3919 bfd_size_type amt = sizeof (*ent); 3920 ent = bfd_alloc (abfd, amt); 3921 if (ent == NULL) 3922 return FALSE; 3923 ent->next = *plist; 3924 ent->sec = sec; 3925 ent->addend = addend; 3926 ent->plt.refcount = 0; 3927 *plist = ent; 3928 } 3929 ent->plt.refcount += 1; 3930 return TRUE; 3931 } 3932 3933 static struct plt_entry * 3934 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend) 3935 { 3936 struct plt_entry *ent; 3937 3938 if (addend < 32768) 3939 sec = NULL; 3940 for (ent = *plist; ent != NULL; ent = ent->next) 3941 if (ent->sec == sec && ent->addend == addend) 3942 break; 3943 return ent; 3944 } 3945 3946 static bfd_boolean 3947 is_branch_reloc (enum elf_ppc_reloc_type r_type) 3948 { 3949 return (r_type == R_PPC_PLTREL24 3950 || r_type == R_PPC_LOCAL24PC 3951 || r_type == R_PPC_REL24 3952 || r_type == R_PPC_REL14 3953 || r_type == R_PPC_REL14_BRTAKEN 3954 || r_type == R_PPC_REL14_BRNTAKEN 3955 || r_type == R_PPC_ADDR24 3956 || r_type == R_PPC_ADDR14 3957 || r_type == R_PPC_ADDR14_BRTAKEN 3958 || r_type == R_PPC_ADDR14_BRNTAKEN); 3959 } 3960 3961 static void 3962 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) 3963 { 3964 (*_bfd_error_handler) 3965 (_("%B: relocation %s cannot be used when making a shared object"), 3966 abfd, 3967 ppc_elf_howto_table[r_type]->name); 3968 bfd_set_error (bfd_error_bad_value); 3969 } 3970 3971 /* Look through the relocs for a section during the first phase, and 3972 allocate space in the global offset table or procedure linkage 3973 table. */ 3974 3975 static bfd_boolean 3976 ppc_elf_check_relocs (bfd *abfd, 3977 struct bfd_link_info *info, 3978 asection *sec, 3979 const Elf_Internal_Rela *relocs) 3980 { 3981 struct ppc_elf_link_hash_table *htab; 3982 Elf_Internal_Shdr *symtab_hdr; 3983 struct elf_link_hash_entry **sym_hashes; 3984 const Elf_Internal_Rela *rel; 3985 const Elf_Internal_Rela *rel_end; 3986 asection *got2, *sreloc; 3987 struct elf_link_hash_entry *tga; 3988 3989 if (bfd_link_relocatable (info)) 3990 return TRUE; 3991 3992 /* Don't do anything special with non-loaded, non-alloced sections. 3993 In particular, any relocs in such sections should not affect GOT 3994 and PLT reference counting (ie. we don't allow them to create GOT 3995 or PLT entries), there's no possibility or desire to optimize TLS 3996 relocs, and there's not much point in propagating relocs to shared 3997 libs that the dynamic linker won't relocate. */ 3998 if ((sec->flags & SEC_ALLOC) == 0) 3999 return TRUE; 4000 4001 #ifdef DEBUG 4002 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", 4003 sec, abfd); 4004 #endif 4005 4006 BFD_ASSERT (is_ppc_elf (abfd)); 4007 4008 /* Initialize howto table if not already done. */ 4009 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 4010 ppc_elf_howto_init (); 4011 4012 htab = ppc_elf_hash_table (info); 4013 if (htab->glink == NULL) 4014 { 4015 if (htab->elf.dynobj == NULL) 4016 htab->elf.dynobj = abfd; 4017 if (!ppc_elf_create_glink (htab->elf.dynobj, info)) 4018 return FALSE; 4019 } 4020 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 4021 FALSE, FALSE, TRUE); 4022 symtab_hdr = &elf_symtab_hdr (abfd); 4023 sym_hashes = elf_sym_hashes (abfd); 4024 got2 = bfd_get_section_by_name (abfd, ".got2"); 4025 sreloc = NULL; 4026 4027 rel_end = relocs + sec->reloc_count; 4028 for (rel = relocs; rel < rel_end; rel++) 4029 { 4030 unsigned long r_symndx; 4031 enum elf_ppc_reloc_type r_type; 4032 struct elf_link_hash_entry *h; 4033 int tls_type; 4034 struct plt_entry **ifunc; 4035 4036 r_symndx = ELF32_R_SYM (rel->r_info); 4037 if (r_symndx < symtab_hdr->sh_info) 4038 h = NULL; 4039 else 4040 { 4041 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4042 while (h->root.type == bfd_link_hash_indirect 4043 || h->root.type == bfd_link_hash_warning) 4044 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4045 4046 /* PR15323, ref flags aren't set for references in the same 4047 object. */ 4048 h->root.non_ir_ref = 1; 4049 } 4050 4051 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. 4052 This shows up in particular in an R_PPC_ADDR32 in the eabi 4053 startup code. */ 4054 if (h != NULL 4055 && htab->got == NULL 4056 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 4057 { 4058 if (htab->elf.dynobj == NULL) 4059 htab->elf.dynobj = abfd; 4060 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 4061 return FALSE; 4062 BFD_ASSERT (h == htab->elf.hgot); 4063 } 4064 4065 tls_type = 0; 4066 r_type = ELF32_R_TYPE (rel->r_info); 4067 ifunc = NULL; 4068 if (h == NULL && !htab->is_vxworks) 4069 { 4070 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4071 abfd, r_symndx); 4072 if (isym == NULL) 4073 return FALSE; 4074 4075 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) 4076 { 4077 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */ 4078 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, 4079 PLT_IFUNC); 4080 if (ifunc == NULL) 4081 return FALSE; 4082 4083 /* STT_GNU_IFUNC symbols must have a PLT entry; 4084 In a non-pie executable even when there are 4085 no plt calls. */ 4086 if (!bfd_link_pic (info) 4087 || is_branch_reloc (r_type)) 4088 { 4089 bfd_vma addend = 0; 4090 if (r_type == R_PPC_PLTREL24) 4091 { 4092 ppc_elf_tdata (abfd)->makes_plt_call = 1; 4093 if (bfd_link_pic (info)) 4094 addend = rel->r_addend; 4095 } 4096 if (!update_plt_info (abfd, ifunc, got2, addend)) 4097 return FALSE; 4098 } 4099 } 4100 } 4101 4102 if (!htab->is_vxworks 4103 && is_branch_reloc (r_type) 4104 && h != NULL 4105 && h == tga) 4106 { 4107 if (rel != relocs 4108 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD 4109 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) 4110 /* We have a new-style __tls_get_addr call with a marker 4111 reloc. */ 4112 ; 4113 else 4114 /* Mark this section as having an old-style call. */ 4115 sec->has_tls_get_addr_call = 1; 4116 } 4117 4118 switch (r_type) 4119 { 4120 case R_PPC_TLSGD: 4121 case R_PPC_TLSLD: 4122 /* These special tls relocs tie a call to __tls_get_addr with 4123 its parameter symbol. */ 4124 break; 4125 4126 case R_PPC_GOT_TLSLD16: 4127 case R_PPC_GOT_TLSLD16_LO: 4128 case R_PPC_GOT_TLSLD16_HI: 4129 case R_PPC_GOT_TLSLD16_HA: 4130 tls_type = TLS_TLS | TLS_LD; 4131 goto dogottls; 4132 4133 case R_PPC_GOT_TLSGD16: 4134 case R_PPC_GOT_TLSGD16_LO: 4135 case R_PPC_GOT_TLSGD16_HI: 4136 case R_PPC_GOT_TLSGD16_HA: 4137 tls_type = TLS_TLS | TLS_GD; 4138 goto dogottls; 4139 4140 case R_PPC_GOT_TPREL16: 4141 case R_PPC_GOT_TPREL16_LO: 4142 case R_PPC_GOT_TPREL16_HI: 4143 case R_PPC_GOT_TPREL16_HA: 4144 if (bfd_link_pic (info)) 4145 info->flags |= DF_STATIC_TLS; 4146 tls_type = TLS_TLS | TLS_TPREL; 4147 goto dogottls; 4148 4149 case R_PPC_GOT_DTPREL16: 4150 case R_PPC_GOT_DTPREL16_LO: 4151 case R_PPC_GOT_DTPREL16_HI: 4152 case R_PPC_GOT_DTPREL16_HA: 4153 tls_type = TLS_TLS | TLS_DTPREL; 4154 dogottls: 4155 sec->has_tls_reloc = 1; 4156 /* Fall thru */ 4157 4158 /* GOT16 relocations */ 4159 case R_PPC_GOT16: 4160 case R_PPC_GOT16_LO: 4161 case R_PPC_GOT16_HI: 4162 case R_PPC_GOT16_HA: 4163 /* This symbol requires a global offset table entry. */ 4164 if (htab->got == NULL) 4165 { 4166 if (htab->elf.dynobj == NULL) 4167 htab->elf.dynobj = abfd; 4168 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 4169 return FALSE; 4170 } 4171 if (h != NULL) 4172 { 4173 h->got.refcount += 1; 4174 ppc_elf_hash_entry (h)->tls_mask |= tls_type; 4175 } 4176 else 4177 /* This is a global offset table entry for a local symbol. */ 4178 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) 4179 return FALSE; 4180 4181 /* We may also need a plt entry if the symbol turns out to be 4182 an ifunc. */ 4183 if (h != NULL && !bfd_link_pic (info)) 4184 { 4185 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4186 return FALSE; 4187 } 4188 break; 4189 4190 /* Indirect .sdata relocation. */ 4191 case R_PPC_EMB_SDAI16: 4192 if (bfd_link_pic (info)) 4193 { 4194 bad_shared_reloc (abfd, r_type); 4195 return FALSE; 4196 } 4197 htab->sdata[0].sym->ref_regular = 1; 4198 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0], 4199 h, rel)) 4200 return FALSE; 4201 if (h != NULL) 4202 { 4203 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4204 h->non_got_ref = TRUE; 4205 } 4206 break; 4207 4208 /* Indirect .sdata2 relocation. */ 4209 case R_PPC_EMB_SDA2I16: 4210 if (bfd_link_pic (info)) 4211 { 4212 bad_shared_reloc (abfd, r_type); 4213 return FALSE; 4214 } 4215 htab->sdata[1].sym->ref_regular = 1; 4216 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1], 4217 h, rel)) 4218 return FALSE; 4219 if (h != NULL) 4220 { 4221 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4222 h->non_got_ref = TRUE; 4223 } 4224 break; 4225 4226 case R_PPC_SDAREL16: 4227 htab->sdata[0].sym->ref_regular = 1; 4228 /* Fall thru */ 4229 4230 case R_PPC_VLE_SDAREL_LO16A: 4231 case R_PPC_VLE_SDAREL_LO16D: 4232 case R_PPC_VLE_SDAREL_HI16A: 4233 case R_PPC_VLE_SDAREL_HI16D: 4234 case R_PPC_VLE_SDAREL_HA16A: 4235 case R_PPC_VLE_SDAREL_HA16D: 4236 if (h != NULL) 4237 { 4238 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4239 h->non_got_ref = TRUE; 4240 } 4241 break; 4242 4243 case R_PPC_VLE_REL8: 4244 case R_PPC_VLE_REL15: 4245 case R_PPC_VLE_REL24: 4246 case R_PPC_VLE_LO16A: 4247 case R_PPC_VLE_LO16D: 4248 case R_PPC_VLE_HI16A: 4249 case R_PPC_VLE_HI16D: 4250 case R_PPC_VLE_HA16A: 4251 case R_PPC_VLE_HA16D: 4252 break; 4253 4254 case R_PPC_EMB_SDA2REL: 4255 if (bfd_link_pic (info)) 4256 { 4257 bad_shared_reloc (abfd, r_type); 4258 return FALSE; 4259 } 4260 htab->sdata[1].sym->ref_regular = 1; 4261 if (h != NULL) 4262 { 4263 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4264 h->non_got_ref = TRUE; 4265 } 4266 break; 4267 4268 case R_PPC_VLE_SDA21_LO: 4269 case R_PPC_VLE_SDA21: 4270 case R_PPC_EMB_SDA21: 4271 case R_PPC_EMB_RELSDA: 4272 if (bfd_link_pic (info)) 4273 { 4274 bad_shared_reloc (abfd, r_type); 4275 return FALSE; 4276 } 4277 if (h != NULL) 4278 { 4279 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4280 h->non_got_ref = TRUE; 4281 } 4282 break; 4283 4284 case R_PPC_EMB_NADDR32: 4285 case R_PPC_EMB_NADDR16: 4286 case R_PPC_EMB_NADDR16_LO: 4287 case R_PPC_EMB_NADDR16_HI: 4288 case R_PPC_EMB_NADDR16_HA: 4289 if (bfd_link_pic (info)) 4290 { 4291 bad_shared_reloc (abfd, r_type); 4292 return FALSE; 4293 } 4294 if (h != NULL) 4295 h->non_got_ref = TRUE; 4296 break; 4297 4298 case R_PPC_PLTREL24: 4299 if (h == NULL) 4300 break; 4301 /* Fall through */ 4302 case R_PPC_PLT32: 4303 case R_PPC_PLTREL32: 4304 case R_PPC_PLT16_LO: 4305 case R_PPC_PLT16_HI: 4306 case R_PPC_PLT16_HA: 4307 #ifdef DEBUG 4308 fprintf (stderr, "Reloc requires a PLT entry\n"); 4309 #endif 4310 /* This symbol requires a procedure linkage table entry. */ 4311 if (h == NULL) 4312 { 4313 if (ifunc == NULL) 4314 { 4315 /* It does not make sense to have a procedure linkage 4316 table entry for a non-ifunc local symbol. */ 4317 info->callbacks->einfo 4318 (_("%P: %H: %s reloc against local symbol\n"), 4319 abfd, sec, rel->r_offset, 4320 ppc_elf_howto_table[r_type]->name); 4321 bfd_set_error (bfd_error_bad_value); 4322 return FALSE; 4323 } 4324 } 4325 else 4326 { 4327 bfd_vma addend = 0; 4328 4329 if (r_type == R_PPC_PLTREL24) 4330 { 4331 ppc_elf_tdata (abfd)->makes_plt_call = 1; 4332 if (bfd_link_pic (info)) 4333 addend = rel->r_addend; 4334 } 4335 h->needs_plt = 1; 4336 if (!update_plt_info (abfd, &h->plt.plist, got2, addend)) 4337 return FALSE; 4338 } 4339 break; 4340 4341 /* The following relocations don't need to propagate the 4342 relocation if linking a shared object since they are 4343 section relative. */ 4344 case R_PPC_SECTOFF: 4345 case R_PPC_SECTOFF_LO: 4346 case R_PPC_SECTOFF_HI: 4347 case R_PPC_SECTOFF_HA: 4348 case R_PPC_DTPREL16: 4349 case R_PPC_DTPREL16_LO: 4350 case R_PPC_DTPREL16_HI: 4351 case R_PPC_DTPREL16_HA: 4352 case R_PPC_TOC16: 4353 break; 4354 4355 case R_PPC_REL16: 4356 case R_PPC_REL16_LO: 4357 case R_PPC_REL16_HI: 4358 case R_PPC_REL16_HA: 4359 case R_PPC_REL16DX_HA: 4360 ppc_elf_tdata (abfd)->has_rel16 = 1; 4361 break; 4362 4363 /* These are just markers. */ 4364 case R_PPC_TLS: 4365 case R_PPC_EMB_MRKREF: 4366 case R_PPC_NONE: 4367 case R_PPC_max: 4368 case R_PPC_RELAX: 4369 case R_PPC_RELAX_PLT: 4370 case R_PPC_RELAX_PLTREL24: 4371 break; 4372 4373 /* These should only appear in dynamic objects. */ 4374 case R_PPC_COPY: 4375 case R_PPC_GLOB_DAT: 4376 case R_PPC_JMP_SLOT: 4377 case R_PPC_RELATIVE: 4378 case R_PPC_IRELATIVE: 4379 break; 4380 4381 /* These aren't handled yet. We'll report an error later. */ 4382 case R_PPC_ADDR30: 4383 case R_PPC_EMB_RELSEC16: 4384 case R_PPC_EMB_RELST_LO: 4385 case R_PPC_EMB_RELST_HI: 4386 case R_PPC_EMB_RELST_HA: 4387 case R_PPC_EMB_BIT_FLD: 4388 break; 4389 4390 /* This refers only to functions defined in the shared library. */ 4391 case R_PPC_LOCAL24PC: 4392 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) 4393 { 4394 htab->plt_type = PLT_OLD; 4395 htab->old_bfd = abfd; 4396 } 4397 if (h != NULL && h->type == STT_GNU_IFUNC) 4398 { 4399 if (bfd_link_pic (info)) 4400 { 4401 info->callbacks->einfo 4402 (_("%P: %H: @local call to ifunc %s\n"), 4403 abfd, sec, rel->r_offset, 4404 h->root.root.string); 4405 bfd_set_error (bfd_error_bad_value); 4406 return FALSE; 4407 } 4408 h->needs_plt = 1; 4409 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4410 return FALSE; 4411 } 4412 break; 4413 4414 /* This relocation describes the C++ object vtable hierarchy. 4415 Reconstruct it for later use during GC. */ 4416 case R_PPC_GNU_VTINHERIT: 4417 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 4418 return FALSE; 4419 break; 4420 4421 /* This relocation describes which C++ vtable entries are actually 4422 used. Record for later use during GC. */ 4423 case R_PPC_GNU_VTENTRY: 4424 BFD_ASSERT (h != NULL); 4425 if (h != NULL 4426 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 4427 return FALSE; 4428 break; 4429 4430 /* We shouldn't really be seeing these. */ 4431 case R_PPC_TPREL32: 4432 case R_PPC_TPREL16: 4433 case R_PPC_TPREL16_LO: 4434 case R_PPC_TPREL16_HI: 4435 case R_PPC_TPREL16_HA: 4436 if (bfd_link_pic (info)) 4437 info->flags |= DF_STATIC_TLS; 4438 goto dodyn; 4439 4440 /* Nor these. */ 4441 case R_PPC_DTPMOD32: 4442 case R_PPC_DTPREL32: 4443 goto dodyn; 4444 4445 case R_PPC_REL32: 4446 if (h == NULL 4447 && got2 != NULL 4448 && (sec->flags & SEC_CODE) != 0 4449 && bfd_link_pic (info) 4450 && htab->plt_type == PLT_UNSET) 4451 { 4452 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before 4453 the start of a function, which assembles to a REL32 4454 reference to .got2. If we detect one of these, then 4455 force the old PLT layout because the linker cannot 4456 reliably deduce the GOT pointer value needed for 4457 PLT call stubs. */ 4458 asection *s; 4459 Elf_Internal_Sym *isym; 4460 4461 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4462 abfd, r_symndx); 4463 if (isym == NULL) 4464 return FALSE; 4465 4466 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4467 if (s == got2) 4468 { 4469 htab->plt_type = PLT_OLD; 4470 htab->old_bfd = abfd; 4471 } 4472 } 4473 if (h == NULL || h == htab->elf.hgot) 4474 break; 4475 /* fall through */ 4476 4477 case R_PPC_ADDR32: 4478 case R_PPC_ADDR16: 4479 case R_PPC_ADDR16_LO: 4480 case R_PPC_ADDR16_HI: 4481 case R_PPC_ADDR16_HA: 4482 case R_PPC_UADDR32: 4483 case R_PPC_UADDR16: 4484 if (h != NULL && !bfd_link_pic (info)) 4485 { 4486 /* We may need a plt entry if the symbol turns out to be 4487 a function defined in a dynamic object. */ 4488 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4489 return FALSE; 4490 4491 /* We may need a copy reloc too. */ 4492 h->non_got_ref = 1; 4493 h->pointer_equality_needed = 1; 4494 if (r_type == R_PPC_ADDR16_HA) 4495 ppc_elf_hash_entry (h)->has_addr16_ha = 1; 4496 if (r_type == R_PPC_ADDR16_LO) 4497 ppc_elf_hash_entry (h)->has_addr16_lo = 1; 4498 } 4499 goto dodyn; 4500 4501 case R_PPC_REL24: 4502 case R_PPC_REL14: 4503 case R_PPC_REL14_BRTAKEN: 4504 case R_PPC_REL14_BRNTAKEN: 4505 if (h == NULL) 4506 break; 4507 if (h == htab->elf.hgot) 4508 { 4509 if (htab->plt_type == PLT_UNSET) 4510 { 4511 htab->plt_type = PLT_OLD; 4512 htab->old_bfd = abfd; 4513 } 4514 break; 4515 } 4516 /* fall through */ 4517 4518 case R_PPC_ADDR24: 4519 case R_PPC_ADDR14: 4520 case R_PPC_ADDR14_BRTAKEN: 4521 case R_PPC_ADDR14_BRNTAKEN: 4522 if (h != NULL && !bfd_link_pic (info)) 4523 { 4524 /* We may need a plt entry if the symbol turns out to be 4525 a function defined in a dynamic object. */ 4526 h->needs_plt = 1; 4527 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4528 return FALSE; 4529 break; 4530 } 4531 4532 dodyn: 4533 /* If we are creating a shared library, and this is a reloc 4534 against a global symbol, or a non PC relative reloc 4535 against a local symbol, then we need to copy the reloc 4536 into the shared library. However, if we are linking with 4537 -Bsymbolic, we do not need to copy a reloc against a 4538 global symbol which is defined in an object we are 4539 including in the link (i.e., DEF_REGULAR is set). At 4540 this point we have not seen all the input files, so it is 4541 possible that DEF_REGULAR is not set now but will be set 4542 later (it is never cleared). In case of a weak definition, 4543 DEF_REGULAR may be cleared later by a strong definition in 4544 a shared library. We account for that possibility below by 4545 storing information in the dyn_relocs field of the hash 4546 table entry. A similar situation occurs when creating 4547 shared libraries and symbol visibility changes render the 4548 symbol local. 4549 4550 If on the other hand, we are creating an executable, we 4551 may need to keep relocations for symbols satisfied by a 4552 dynamic library if we manage to avoid copy relocs for the 4553 symbol. */ 4554 if ((bfd_link_pic (info) 4555 && (must_be_dyn_reloc (info, r_type) 4556 || (h != NULL 4557 && (!SYMBOLIC_BIND (info, h) 4558 || h->root.type == bfd_link_hash_defweak 4559 || !h->def_regular)))) 4560 || (ELIMINATE_COPY_RELOCS 4561 && !bfd_link_pic (info) 4562 && h != NULL 4563 && (h->root.type == bfd_link_hash_defweak 4564 || !h->def_regular))) 4565 { 4566 #ifdef DEBUG 4567 fprintf (stderr, 4568 "ppc_elf_check_relocs needs to " 4569 "create relocation for %s\n", 4570 (h && h->root.root.string 4571 ? h->root.root.string : "<unknown>")); 4572 #endif 4573 if (sreloc == NULL) 4574 { 4575 if (htab->elf.dynobj == NULL) 4576 htab->elf.dynobj = abfd; 4577 4578 sreloc = _bfd_elf_make_dynamic_reloc_section 4579 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); 4580 4581 if (sreloc == NULL) 4582 return FALSE; 4583 } 4584 4585 /* If this is a global symbol, we count the number of 4586 relocations we need for this symbol. */ 4587 if (h != NULL) 4588 { 4589 struct elf_dyn_relocs *p; 4590 struct elf_dyn_relocs **rel_head; 4591 4592 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs; 4593 p = *rel_head; 4594 if (p == NULL || p->sec != sec) 4595 { 4596 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 4597 if (p == NULL) 4598 return FALSE; 4599 p->next = *rel_head; 4600 *rel_head = p; 4601 p->sec = sec; 4602 p->count = 0; 4603 p->pc_count = 0; 4604 } 4605 p->count += 1; 4606 if (!must_be_dyn_reloc (info, r_type)) 4607 p->pc_count += 1; 4608 } 4609 else 4610 { 4611 /* Track dynamic relocs needed for local syms too. 4612 We really need local syms available to do this 4613 easily. Oh well. */ 4614 struct ppc_dyn_relocs *p; 4615 struct ppc_dyn_relocs **rel_head; 4616 bfd_boolean is_ifunc; 4617 asection *s; 4618 void *vpp; 4619 Elf_Internal_Sym *isym; 4620 4621 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4622 abfd, r_symndx); 4623 if (isym == NULL) 4624 return FALSE; 4625 4626 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4627 if (s == NULL) 4628 s = sec; 4629 4630 vpp = &elf_section_data (s)->local_dynrel; 4631 rel_head = (struct ppc_dyn_relocs **) vpp; 4632 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC; 4633 p = *rel_head; 4634 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) 4635 p = p->next; 4636 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) 4637 { 4638 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 4639 if (p == NULL) 4640 return FALSE; 4641 p->next = *rel_head; 4642 *rel_head = p; 4643 p->sec = sec; 4644 p->ifunc = is_ifunc; 4645 p->count = 0; 4646 } 4647 p->count += 1; 4648 } 4649 } 4650 4651 break; 4652 } 4653 } 4654 4655 return TRUE; 4656 } 4657 4658 4660 /* Merge object attributes from IBFD into OBFD. Raise an error if 4661 there are conflicting attributes. */ 4662 static bfd_boolean 4663 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd) 4664 { 4665 obj_attribute *in_attr, *in_attrs; 4666 obj_attribute *out_attr, *out_attrs; 4667 4668 if (!elf_known_obj_attributes_proc (obfd)[0].i) 4669 { 4670 /* This is the first object. Copy the attributes. */ 4671 _bfd_elf_copy_obj_attributes (ibfd, obfd); 4672 4673 /* Use the Tag_null value to indicate the attributes have been 4674 initialized. */ 4675 elf_known_obj_attributes_proc (obfd)[0].i = 1; 4676 4677 return TRUE; 4678 } 4679 4680 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; 4681 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; 4682 4683 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge 4684 non-conflicting ones. */ 4685 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP]; 4686 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP]; 4687 if (in_attr->i != out_attr->i) 4688 { 4689 out_attr->type = 1; 4690 if (out_attr->i == 0) 4691 out_attr->i = in_attr->i; 4692 else if (in_attr->i == 0) 4693 ; 4694 else if (out_attr->i == 1 && in_attr->i == 2) 4695 _bfd_error_handler 4696 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd); 4697 else if (out_attr->i == 1 && in_attr->i == 3) 4698 _bfd_error_handler 4699 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), 4700 obfd, ibfd); 4701 else if (out_attr->i == 3 && in_attr->i == 1) 4702 _bfd_error_handler 4703 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), 4704 ibfd, obfd); 4705 else if (out_attr->i == 3 && in_attr->i == 2) 4706 _bfd_error_handler 4707 (_("Warning: %B uses soft float, %B uses single-precision hard float"), 4708 ibfd, obfd); 4709 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3)) 4710 _bfd_error_handler 4711 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd); 4712 else if (in_attr->i > 3) 4713 _bfd_error_handler 4714 (_("Warning: %B uses unknown floating point ABI %d"), ibfd, 4715 in_attr->i); 4716 else 4717 _bfd_error_handler 4718 (_("Warning: %B uses unknown floating point ABI %d"), obfd, 4719 out_attr->i); 4720 } 4721 4722 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and 4723 merge non-conflicting ones. */ 4724 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector]; 4725 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector]; 4726 if (in_attr->i != out_attr->i) 4727 { 4728 const char *in_abi = NULL, *out_abi = NULL; 4729 4730 switch (in_attr->i) 4731 { 4732 case 1: in_abi = "generic"; break; 4733 case 2: in_abi = "AltiVec"; break; 4734 case 3: in_abi = "SPE"; break; 4735 } 4736 4737 switch (out_attr->i) 4738 { 4739 case 1: out_abi = "generic"; break; 4740 case 2: out_abi = "AltiVec"; break; 4741 case 3: out_abi = "SPE"; break; 4742 } 4743 4744 out_attr->type = 1; 4745 if (out_attr->i == 0) 4746 out_attr->i = in_attr->i; 4747 else if (in_attr->i == 0) 4748 ; 4749 /* For now, allow generic to transition to AltiVec or SPE 4750 without a warning. If GCC marked files with their stack 4751 alignment and used don't-care markings for files which are 4752 not affected by the vector ABI, we could warn about this 4753 case too. */ 4754 else if (out_attr->i == 1) 4755 out_attr->i = in_attr->i; 4756 else if (in_attr->i == 1) 4757 ; 4758 else if (in_abi == NULL) 4759 _bfd_error_handler 4760 (_("Warning: %B uses unknown vector ABI %d"), ibfd, 4761 in_attr->i); 4762 else if (out_abi == NULL) 4763 _bfd_error_handler 4764 (_("Warning: %B uses unknown vector ABI %d"), obfd, 4765 in_attr->i); 4766 else 4767 _bfd_error_handler 4768 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""), 4769 ibfd, obfd, in_abi, out_abi); 4770 } 4771 4772 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes 4773 and merge non-conflicting ones. */ 4774 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4775 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4776 if (in_attr->i != out_attr->i) 4777 { 4778 out_attr->type = 1; 4779 if (out_attr->i == 0) 4780 out_attr->i = in_attr->i; 4781 else if (in_attr->i == 0) 4782 ; 4783 else if (out_attr->i == 1 && in_attr->i == 2) 4784 _bfd_error_handler 4785 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd); 4786 else if (out_attr->i == 2 && in_attr->i == 1) 4787 _bfd_error_handler 4788 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd); 4789 else if (in_attr->i > 2) 4790 _bfd_error_handler 4791 (_("Warning: %B uses unknown small structure return convention %d"), ibfd, 4792 in_attr->i); 4793 else 4794 _bfd_error_handler 4795 (_("Warning: %B uses unknown small structure return convention %d"), obfd, 4796 out_attr->i); 4797 } 4798 4799 /* Merge Tag_compatibility attributes and any common GNU ones. */ 4800 _bfd_elf_merge_object_attributes (ibfd, obfd); 4801 4802 return TRUE; 4803 } 4804 4805 /* Merge backend specific data from an object file to the output 4806 object file when linking. */ 4807 4808 static bfd_boolean 4809 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4810 { 4811 flagword old_flags; 4812 flagword new_flags; 4813 bfd_boolean error; 4814 4815 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd)) 4816 return TRUE; 4817 4818 /* Check if we have the same endianness. */ 4819 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 4820 return FALSE; 4821 4822 if (!ppc_elf_merge_obj_attributes (ibfd, obfd)) 4823 return FALSE; 4824 4825 new_flags = elf_elfheader (ibfd)->e_flags; 4826 old_flags = elf_elfheader (obfd)->e_flags; 4827 if (!elf_flags_init (obfd)) 4828 { 4829 /* First call, no flags set. */ 4830 elf_flags_init (obfd) = TRUE; 4831 elf_elfheader (obfd)->e_flags = new_flags; 4832 } 4833 4834 /* Compatible flags are ok. */ 4835 else if (new_flags == old_flags) 4836 ; 4837 4838 /* Incompatible flags. */ 4839 else 4840 { 4841 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib 4842 to be linked with either. */ 4843 error = FALSE; 4844 if ((new_flags & EF_PPC_RELOCATABLE) != 0 4845 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) 4846 { 4847 error = TRUE; 4848 (*_bfd_error_handler) 4849 (_("%B: compiled with -mrelocatable and linked with " 4850 "modules compiled normally"), ibfd); 4851 } 4852 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 4853 && (old_flags & EF_PPC_RELOCATABLE) != 0) 4854 { 4855 error = TRUE; 4856 (*_bfd_error_handler) 4857 (_("%B: compiled normally and linked with " 4858 "modules compiled with -mrelocatable"), ibfd); 4859 } 4860 4861 /* The output is -mrelocatable-lib iff both the input files are. */ 4862 if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) 4863 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; 4864 4865 /* The output is -mrelocatable iff it can't be -mrelocatable-lib, 4866 but each input file is either -mrelocatable or -mrelocatable-lib. */ 4867 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) 4868 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) 4869 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) 4870 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; 4871 4872 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if 4873 any module uses it. */ 4874 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); 4875 4876 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4877 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4878 4879 /* Warn about any other mismatches. */ 4880 if (new_flags != old_flags) 4881 { 4882 error = TRUE; 4883 (*_bfd_error_handler) 4884 (_("%B: uses different e_flags (0x%lx) fields " 4885 "than previous modules (0x%lx)"), 4886 ibfd, (long) new_flags, (long) old_flags); 4887 } 4888 4889 if (error) 4890 { 4891 bfd_set_error (bfd_error_bad_value); 4892 return FALSE; 4893 } 4894 } 4895 4896 return TRUE; 4897 } 4898 4899 static void 4900 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc, 4901 bfd_vma value, 4902 split16_format_type split16_format) 4903 4904 { 4905 unsigned int insn, top5; 4906 4907 insn = bfd_get_32 (output_bfd, loc); 4908 top5 = value & 0xf800; 4909 top5 = top5 << (split16_format == split16a_type ? 9 : 5); 4910 insn |= top5; 4911 insn |= value & 0x7ff; 4912 bfd_put_32 (output_bfd, insn, loc); 4913 } 4914 4915 4916 /* Choose which PLT scheme to use, and set .plt flags appropriately. 4918 Returns -1 on error, 0 for old PLT, 1 for new PLT. */ 4919 int 4920 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, 4921 struct bfd_link_info *info) 4922 { 4923 struct ppc_elf_link_hash_table *htab; 4924 flagword flags; 4925 4926 htab = ppc_elf_hash_table (info); 4927 4928 if (htab->plt_type == PLT_UNSET) 4929 { 4930 struct elf_link_hash_entry *h; 4931 4932 if (htab->params->plt_style == PLT_OLD) 4933 htab->plt_type = PLT_OLD; 4934 else if (bfd_link_pic (info) 4935 && htab->elf.dynamic_sections_created 4936 && (h = elf_link_hash_lookup (&htab->elf, "_mcount", 4937 FALSE, FALSE, TRUE)) != NULL 4938 && (h->type == STT_FUNC 4939 || h->needs_plt) 4940 && h->ref_regular 4941 && !(SYMBOL_CALLS_LOCAL (info, h) 4942 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 4943 && h->root.type == bfd_link_hash_undefweak))) 4944 { 4945 /* Profiling of shared libs (and pies) is not supported with 4946 secure plt, because ppc32 does profiling before a 4947 function prologue and a secure plt pic call stubs needs 4948 r30 to be set up. */ 4949 htab->plt_type = PLT_OLD; 4950 } 4951 else 4952 { 4953 bfd *ibfd; 4954 enum ppc_elf_plt_type plt_type = htab->params->plt_style; 4955 4956 /* Look through the reloc flags left by ppc_elf_check_relocs. 4957 Use the old style bss plt if a file makes plt calls 4958 without using the new relocs, and if ld isn't given 4959 --secure-plt and we never see REL16 relocs. */ 4960 if (plt_type == PLT_UNSET) 4961 plt_type = PLT_OLD; 4962 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) 4963 if (is_ppc_elf (ibfd)) 4964 { 4965 if (ppc_elf_tdata (ibfd)->has_rel16) 4966 plt_type = PLT_NEW; 4967 else if (ppc_elf_tdata (ibfd)->makes_plt_call) 4968 { 4969 plt_type = PLT_OLD; 4970 htab->old_bfd = ibfd; 4971 break; 4972 } 4973 } 4974 htab->plt_type = plt_type; 4975 } 4976 } 4977 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW) 4978 { 4979 if (htab->old_bfd != NULL) 4980 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"), 4981 htab->old_bfd); 4982 else 4983 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n")); 4984 } 4985 4986 BFD_ASSERT (htab->plt_type != PLT_VXWORKS); 4987 4988 if (htab->plt_type == PLT_NEW) 4989 { 4990 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 4991 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 4992 4993 /* The new PLT is a loaded section. */ 4994 if (htab->plt != NULL 4995 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags)) 4996 return -1; 4997 4998 /* The new GOT is not executable. */ 4999 if (htab->got != NULL 5000 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags)) 5001 return -1; 5002 } 5003 else 5004 { 5005 /* Stop an unused .glink section from affecting .text alignment. */ 5006 if (htab->glink != NULL 5007 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) 5008 return -1; 5009 } 5010 return htab->plt_type == PLT_NEW; 5011 } 5012 5013 /* Return the section that should be marked against GC for a given 5015 relocation. */ 5016 5017 static asection * 5018 ppc_elf_gc_mark_hook (asection *sec, 5019 struct bfd_link_info *info, 5020 Elf_Internal_Rela *rel, 5021 struct elf_link_hash_entry *h, 5022 Elf_Internal_Sym *sym) 5023 { 5024 if (h != NULL) 5025 switch (ELF32_R_TYPE (rel->r_info)) 5026 { 5027 case R_PPC_GNU_VTINHERIT: 5028 case R_PPC_GNU_VTENTRY: 5029 return NULL; 5030 } 5031 5032 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 5033 } 5034 5035 /* Update the got, plt and dynamic reloc reference counts for the 5036 section being removed. */ 5037 5038 static bfd_boolean 5039 ppc_elf_gc_sweep_hook (bfd *abfd, 5040 struct bfd_link_info *info, 5041 asection *sec, 5042 const Elf_Internal_Rela *relocs) 5043 { 5044 struct ppc_elf_link_hash_table *htab; 5045 Elf_Internal_Shdr *symtab_hdr; 5046 struct elf_link_hash_entry **sym_hashes; 5047 bfd_signed_vma *local_got_refcounts; 5048 const Elf_Internal_Rela *rel, *relend; 5049 asection *got2; 5050 5051 if (bfd_link_relocatable (info)) 5052 return TRUE; 5053 5054 if ((sec->flags & SEC_ALLOC) == 0) 5055 return TRUE; 5056 5057 elf_section_data (sec)->local_dynrel = NULL; 5058 5059 htab = ppc_elf_hash_table (info); 5060 symtab_hdr = &elf_symtab_hdr (abfd); 5061 sym_hashes = elf_sym_hashes (abfd); 5062 local_got_refcounts = elf_local_got_refcounts (abfd); 5063 got2 = bfd_get_section_by_name (abfd, ".got2"); 5064 5065 relend = relocs + sec->reloc_count; 5066 for (rel = relocs; rel < relend; rel++) 5067 { 5068 unsigned long r_symndx; 5069 enum elf_ppc_reloc_type r_type; 5070 struct elf_link_hash_entry *h = NULL; 5071 5072 r_symndx = ELF32_R_SYM (rel->r_info); 5073 if (r_symndx >= symtab_hdr->sh_info) 5074 { 5075 struct elf_dyn_relocs **pp, *p; 5076 struct ppc_elf_link_hash_entry *eh; 5077 5078 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5079 while (h->root.type == bfd_link_hash_indirect 5080 || h->root.type == bfd_link_hash_warning) 5081 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5082 eh = (struct ppc_elf_link_hash_entry *) h; 5083 5084 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 5085 if (p->sec == sec) 5086 { 5087 /* Everything must go for SEC. */ 5088 *pp = p->next; 5089 break; 5090 } 5091 } 5092 5093 r_type = ELF32_R_TYPE (rel->r_info); 5094 if (!htab->is_vxworks 5095 && h == NULL 5096 && local_got_refcounts != NULL 5097 && (!bfd_link_pic (info) 5098 || is_branch_reloc (r_type))) 5099 { 5100 struct plt_entry **local_plt = (struct plt_entry **) 5101 (local_got_refcounts + symtab_hdr->sh_info); 5102 char *local_got_tls_masks = (char *) 5103 (local_plt + symtab_hdr->sh_info); 5104 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) 5105 { 5106 struct plt_entry **ifunc = local_plt + r_symndx; 5107 bfd_vma addend = 0; 5108 struct plt_entry *ent; 5109 5110 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 5111 addend = rel->r_addend; 5112 ent = find_plt_ent (ifunc, got2, addend); 5113 if (ent->plt.refcount > 0) 5114 ent->plt.refcount -= 1; 5115 continue; 5116 } 5117 } 5118 5119 switch (r_type) 5120 { 5121 case R_PPC_GOT_TLSLD16: 5122 case R_PPC_GOT_TLSLD16_LO: 5123 case R_PPC_GOT_TLSLD16_HI: 5124 case R_PPC_GOT_TLSLD16_HA: 5125 case R_PPC_GOT_TLSGD16: 5126 case R_PPC_GOT_TLSGD16_LO: 5127 case R_PPC_GOT_TLSGD16_HI: 5128 case R_PPC_GOT_TLSGD16_HA: 5129 case R_PPC_GOT_TPREL16: 5130 case R_PPC_GOT_TPREL16_LO: 5131 case R_PPC_GOT_TPREL16_HI: 5132 case R_PPC_GOT_TPREL16_HA: 5133 case R_PPC_GOT_DTPREL16: 5134 case R_PPC_GOT_DTPREL16_LO: 5135 case R_PPC_GOT_DTPREL16_HI: 5136 case R_PPC_GOT_DTPREL16_HA: 5137 case R_PPC_GOT16: 5138 case R_PPC_GOT16_LO: 5139 case R_PPC_GOT16_HI: 5140 case R_PPC_GOT16_HA: 5141 if (h != NULL) 5142 { 5143 if (h->got.refcount > 0) 5144 h->got.refcount--; 5145 if (!bfd_link_pic (info)) 5146 { 5147 struct plt_entry *ent; 5148 5149 ent = find_plt_ent (&h->plt.plist, NULL, 0); 5150 if (ent != NULL && ent->plt.refcount > 0) 5151 ent->plt.refcount -= 1; 5152 } 5153 } 5154 else if (local_got_refcounts != NULL) 5155 { 5156 if (local_got_refcounts[r_symndx] > 0) 5157 local_got_refcounts[r_symndx]--; 5158 } 5159 break; 5160 5161 case R_PPC_REL24: 5162 case R_PPC_REL14: 5163 case R_PPC_REL14_BRTAKEN: 5164 case R_PPC_REL14_BRNTAKEN: 5165 case R_PPC_REL32: 5166 if (h == NULL || h == htab->elf.hgot) 5167 break; 5168 /* Fall thru */ 5169 5170 case R_PPC_ADDR32: 5171 case R_PPC_ADDR24: 5172 case R_PPC_ADDR16: 5173 case R_PPC_ADDR16_LO: 5174 case R_PPC_ADDR16_HI: 5175 case R_PPC_ADDR16_HA: 5176 case R_PPC_ADDR14: 5177 case R_PPC_ADDR14_BRTAKEN: 5178 case R_PPC_ADDR14_BRNTAKEN: 5179 case R_PPC_UADDR32: 5180 case R_PPC_UADDR16: 5181 if (bfd_link_pic (info)) 5182 break; 5183 5184 case R_PPC_PLT32: 5185 case R_PPC_PLTREL24: 5186 case R_PPC_PLTREL32: 5187 case R_PPC_PLT16_LO: 5188 case R_PPC_PLT16_HI: 5189 case R_PPC_PLT16_HA: 5190 if (h != NULL) 5191 { 5192 bfd_vma addend = 0; 5193 struct plt_entry *ent; 5194 5195 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 5196 addend = rel->r_addend; 5197 ent = find_plt_ent (&h->plt.plist, got2, addend); 5198 if (ent != NULL && ent->plt.refcount > 0) 5199 ent->plt.refcount -= 1; 5200 } 5201 break; 5202 5203 default: 5204 break; 5205 } 5206 } 5207 return TRUE; 5208 } 5209 5210 /* Set plt output section type, htab->tls_get_addr, and call the 5212 generic ELF tls_setup function. */ 5213 5214 asection * 5215 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) 5216 { 5217 struct ppc_elf_link_hash_table *htab; 5218 5219 htab = ppc_elf_hash_table (info); 5220 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 5221 FALSE, FALSE, TRUE); 5222 if (htab->plt_type != PLT_NEW) 5223 htab->params->no_tls_get_addr_opt = TRUE; 5224 5225 if (!htab->params->no_tls_get_addr_opt) 5226 { 5227 struct elf_link_hash_entry *opt, *tga; 5228 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", 5229 FALSE, FALSE, TRUE); 5230 if (opt != NULL 5231 && (opt->root.type == bfd_link_hash_defined 5232 || opt->root.type == bfd_link_hash_defweak)) 5233 { 5234 /* If glibc supports an optimized __tls_get_addr call stub, 5235 signalled by the presence of __tls_get_addr_opt, and we'll 5236 be calling __tls_get_addr via a plt call stub, then 5237 make __tls_get_addr point to __tls_get_addr_opt. */ 5238 tga = htab->tls_get_addr; 5239 if (htab->elf.dynamic_sections_created 5240 && tga != NULL 5241 && (tga->type == STT_FUNC 5242 || tga->needs_plt) 5243 && !(SYMBOL_CALLS_LOCAL (info, tga) 5244 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT 5245 && tga->root.type == bfd_link_hash_undefweak))) 5246 { 5247 struct plt_entry *ent; 5248 for (ent = tga->plt.plist; ent != NULL; ent = ent->next) 5249 if (ent->plt.refcount > 0) 5250 break; 5251 if (ent != NULL) 5252 { 5253 tga->root.type = bfd_link_hash_indirect; 5254 tga->root.u.i.link = &opt->root; 5255 ppc_elf_copy_indirect_symbol (info, opt, tga); 5256 opt->forced_local = 0; 5257 if (opt->dynindx != -1) 5258 { 5259 /* Use __tls_get_addr_opt in dynamic relocations. */ 5260 opt->dynindx = -1; 5261 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 5262 opt->dynstr_index); 5263 if (!bfd_elf_link_record_dynamic_symbol (info, opt)) 5264 return FALSE; 5265 } 5266 htab->tls_get_addr = opt; 5267 } 5268 } 5269 } 5270 else 5271 htab->params->no_tls_get_addr_opt = TRUE; 5272 } 5273 if (htab->plt_type == PLT_NEW 5274 && htab->plt != NULL 5275 && htab->plt->output_section != NULL) 5276 { 5277 elf_section_type (htab->plt->output_section) = SHT_PROGBITS; 5278 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE; 5279 } 5280 5281 return _bfd_elf_tls_setup (obfd, info); 5282 } 5283 5284 /* Return TRUE iff REL is a branch reloc with a global symbol matching 5285 HASH. */ 5286 5287 static bfd_boolean 5288 branch_reloc_hash_match (const bfd *ibfd, 5289 const Elf_Internal_Rela *rel, 5290 const struct elf_link_hash_entry *hash) 5291 { 5292 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5293 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 5294 unsigned int r_symndx = ELF32_R_SYM (rel->r_info); 5295 5296 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) 5297 { 5298 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 5299 struct elf_link_hash_entry *h; 5300 5301 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5302 while (h->root.type == bfd_link_hash_indirect 5303 || h->root.type == bfd_link_hash_warning) 5304 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5305 if (h == hash) 5306 return TRUE; 5307 } 5308 return FALSE; 5309 } 5310 5311 /* Run through all the TLS relocs looking for optimization 5312 opportunities. */ 5313 5314 bfd_boolean 5315 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, 5316 struct bfd_link_info *info) 5317 { 5318 bfd *ibfd; 5319 asection *sec; 5320 struct ppc_elf_link_hash_table *htab; 5321 int pass; 5322 5323 if (!bfd_link_executable (info)) 5324 return TRUE; 5325 5326 htab = ppc_elf_hash_table (info); 5327 if (htab == NULL) 5328 return FALSE; 5329 5330 /* Make two passes through the relocs. First time check that tls 5331 relocs involved in setting up a tls_get_addr call are indeed 5332 followed by such a call. If they are not, don't do any tls 5333 optimization. On the second pass twiddle tls_mask flags to 5334 notify relocate_section that optimization can be done, and 5335 adjust got and plt refcounts. */ 5336 for (pass = 0; pass < 2; ++pass) 5337 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 5338 { 5339 Elf_Internal_Sym *locsyms = NULL; 5340 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5341 asection *got2 = bfd_get_section_by_name (ibfd, ".got2"); 5342 5343 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 5344 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 5345 { 5346 Elf_Internal_Rela *relstart, *rel, *relend; 5347 int expecting_tls_get_addr = 0; 5348 5349 /* Read the relocations. */ 5350 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 5351 info->keep_memory); 5352 if (relstart == NULL) 5353 return FALSE; 5354 5355 relend = relstart + sec->reloc_count; 5356 for (rel = relstart; rel < relend; rel++) 5357 { 5358 enum elf_ppc_reloc_type r_type; 5359 unsigned long r_symndx; 5360 struct elf_link_hash_entry *h = NULL; 5361 char *tls_mask; 5362 char tls_set, tls_clear; 5363 bfd_boolean is_local; 5364 bfd_signed_vma *got_count; 5365 5366 r_symndx = ELF32_R_SYM (rel->r_info); 5367 if (r_symndx >= symtab_hdr->sh_info) 5368 { 5369 struct elf_link_hash_entry **sym_hashes; 5370 5371 sym_hashes = elf_sym_hashes (ibfd); 5372 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5373 while (h->root.type == bfd_link_hash_indirect 5374 || h->root.type == bfd_link_hash_warning) 5375 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5376 } 5377 5378 is_local = FALSE; 5379 if (h == NULL 5380 || !h->def_dynamic) 5381 is_local = TRUE; 5382 5383 r_type = ELF32_R_TYPE (rel->r_info); 5384 /* If this section has old-style __tls_get_addr calls 5385 without marker relocs, then check that each 5386 __tls_get_addr call reloc is preceded by a reloc 5387 that conceivably belongs to the __tls_get_addr arg 5388 setup insn. If we don't find matching arg setup 5389 relocs, don't do any tls optimization. */ 5390 if (pass == 0 5391 && sec->has_tls_get_addr_call 5392 && h != NULL 5393 && h == htab->tls_get_addr 5394 && !expecting_tls_get_addr 5395 && is_branch_reloc (r_type)) 5396 { 5397 info->callbacks->minfo ("%H __tls_get_addr lost arg, " 5398 "TLS optimization disabled\n", 5399 ibfd, sec, rel->r_offset); 5400 if (elf_section_data (sec)->relocs != relstart) 5401 free (relstart); 5402 return TRUE; 5403 } 5404 5405 expecting_tls_get_addr = 0; 5406 switch (r_type) 5407 { 5408 case R_PPC_GOT_TLSLD16: 5409 case R_PPC_GOT_TLSLD16_LO: 5410 expecting_tls_get_addr = 1; 5411 /* Fall thru */ 5412 5413 case R_PPC_GOT_TLSLD16_HI: 5414 case R_PPC_GOT_TLSLD16_HA: 5415 /* These relocs should never be against a symbol 5416 defined in a shared lib. Leave them alone if 5417 that turns out to be the case. */ 5418 if (!is_local) 5419 continue; 5420 5421 /* LD -> LE */ 5422 tls_set = 0; 5423 tls_clear = TLS_LD; 5424 break; 5425 5426 case R_PPC_GOT_TLSGD16: 5427 case R_PPC_GOT_TLSGD16_LO: 5428 expecting_tls_get_addr = 1; 5429 /* Fall thru */ 5430 5431 case R_PPC_GOT_TLSGD16_HI: 5432 case R_PPC_GOT_TLSGD16_HA: 5433 if (is_local) 5434 /* GD -> LE */ 5435 tls_set = 0; 5436 else 5437 /* GD -> IE */ 5438 tls_set = TLS_TLS | TLS_TPRELGD; 5439 tls_clear = TLS_GD; 5440 break; 5441 5442 case R_PPC_GOT_TPREL16: 5443 case R_PPC_GOT_TPREL16_LO: 5444 case R_PPC_GOT_TPREL16_HI: 5445 case R_PPC_GOT_TPREL16_HA: 5446 if (is_local) 5447 { 5448 /* IE -> LE */ 5449 tls_set = 0; 5450 tls_clear = TLS_TPREL; 5451 break; 5452 } 5453 else 5454 continue; 5455 5456 case R_PPC_TLSGD: 5457 case R_PPC_TLSLD: 5458 expecting_tls_get_addr = 2; 5459 tls_set = 0; 5460 tls_clear = 0; 5461 break; 5462 5463 default: 5464 continue; 5465 } 5466 5467 if (pass == 0) 5468 { 5469 if (!expecting_tls_get_addr 5470 || (expecting_tls_get_addr == 1 5471 && !sec->has_tls_get_addr_call)) 5472 continue; 5473 5474 if (rel + 1 < relend 5475 && branch_reloc_hash_match (ibfd, rel + 1, 5476 htab->tls_get_addr)) 5477 continue; 5478 5479 /* Uh oh, we didn't find the expected call. We 5480 could just mark this symbol to exclude it 5481 from tls optimization but it's safer to skip 5482 the entire optimization. */ 5483 info->callbacks->minfo (_("%H arg lost __tls_get_addr, " 5484 "TLS optimization disabled\n"), 5485 ibfd, sec, rel->r_offset); 5486 if (elf_section_data (sec)->relocs != relstart) 5487 free (relstart); 5488 return TRUE; 5489 } 5490 5491 if (expecting_tls_get_addr) 5492 { 5493 struct plt_entry *ent; 5494 bfd_vma addend = 0; 5495 5496 if (bfd_link_pic (info) 5497 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24) 5498 addend = rel[1].r_addend; 5499 ent = find_plt_ent (&htab->tls_get_addr->plt.plist, 5500 got2, addend); 5501 if (ent != NULL && ent->plt.refcount > 0) 5502 ent->plt.refcount -= 1; 5503 5504 if (expecting_tls_get_addr == 2) 5505 continue; 5506 } 5507 5508 if (h != NULL) 5509 { 5510 tls_mask = &ppc_elf_hash_entry (h)->tls_mask; 5511 got_count = &h->got.refcount; 5512 } 5513 else 5514 { 5515 bfd_signed_vma *lgot_refs; 5516 struct plt_entry **local_plt; 5517 char *lgot_masks; 5518 5519 if (locsyms == NULL) 5520 { 5521 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 5522 if (locsyms == NULL) 5523 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 5524 symtab_hdr->sh_info, 5525 0, NULL, NULL, NULL); 5526 if (locsyms == NULL) 5527 { 5528 if (elf_section_data (sec)->relocs != relstart) 5529 free (relstart); 5530 return FALSE; 5531 } 5532 } 5533 lgot_refs = elf_local_got_refcounts (ibfd); 5534 if (lgot_refs == NULL) 5535 abort (); 5536 local_plt = (struct plt_entry **) 5537 (lgot_refs + symtab_hdr->sh_info); 5538 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 5539 tls_mask = &lgot_masks[r_symndx]; 5540 got_count = &lgot_refs[r_symndx]; 5541 } 5542 5543 if (tls_set == 0) 5544 { 5545 /* We managed to get rid of a got entry. */ 5546 if (*got_count > 0) 5547 *got_count -= 1; 5548 } 5549 5550 *tls_mask |= tls_set; 5551 *tls_mask &= ~tls_clear; 5552 } 5553 5554 if (elf_section_data (sec)->relocs != relstart) 5555 free (relstart); 5556 } 5557 5558 if (locsyms != NULL 5559 && (symtab_hdr->contents != (unsigned char *) locsyms)) 5560 { 5561 if (!info->keep_memory) 5562 free (locsyms); 5563 else 5564 symtab_hdr->contents = (unsigned char *) locsyms; 5565 } 5566 } 5567 return TRUE; 5568 } 5569 5570 /* Return true if we have dynamic relocs that apply to read-only sections. */ 5572 5573 static bfd_boolean 5574 readonly_dynrelocs (struct elf_link_hash_entry *h) 5575 { 5576 struct elf_dyn_relocs *p; 5577 5578 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 5579 { 5580 asection *s = p->sec->output_section; 5581 5582 if (s != NULL 5583 && ((s->flags & (SEC_READONLY | SEC_ALLOC)) 5584 == (SEC_READONLY | SEC_ALLOC))) 5585 return TRUE; 5586 } 5587 return FALSE; 5588 } 5589 5590 /* Adjust a symbol defined by a dynamic object and referenced by a 5591 regular object. The current definition is in some section of the 5592 dynamic object, but we're not including those sections. We have to 5593 change the definition to something the rest of the link can 5594 understand. */ 5595 5596 static bfd_boolean 5597 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 5598 struct elf_link_hash_entry *h) 5599 { 5600 struct ppc_elf_link_hash_table *htab; 5601 asection *s; 5602 5603 #ifdef DEBUG 5604 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", 5605 h->root.root.string); 5606 #endif 5607 5608 /* Make sure we know what is going on here. */ 5609 htab = ppc_elf_hash_table (info); 5610 BFD_ASSERT (htab->elf.dynobj != NULL 5611 && (h->needs_plt 5612 || h->type == STT_GNU_IFUNC 5613 || h->u.weakdef != NULL 5614 || (h->def_dynamic 5615 && h->ref_regular 5616 && !h->def_regular))); 5617 5618 /* Deal with function syms. */ 5619 if (h->type == STT_FUNC 5620 || h->type == STT_GNU_IFUNC 5621 || h->needs_plt) 5622 { 5623 /* Clear procedure linkage table information for any symbol that 5624 won't need a .plt entry. */ 5625 struct plt_entry *ent; 5626 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5627 if (ent->plt.refcount > 0) 5628 break; 5629 if (ent == NULL 5630 || (h->type != STT_GNU_IFUNC 5631 && (SYMBOL_CALLS_LOCAL (info, h) 5632 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 5633 && h->root.type == bfd_link_hash_undefweak)))) 5634 { 5635 /* A PLT entry is not required/allowed when: 5636 5637 1. We are not using ld.so; because then the PLT entry 5638 can't be set up, so we can't use one. In this case, 5639 ppc_elf_adjust_dynamic_symbol won't even be called. 5640 5641 2. GC has rendered the entry unused. 5642 5643 3. We know for certain that a call to this symbol 5644 will go to this object, or will remain undefined. */ 5645 h->plt.plist = NULL; 5646 h->needs_plt = 0; 5647 h->pointer_equality_needed = 0; 5648 } 5649 else 5650 { 5651 /* Taking a function's address in a read/write section 5652 doesn't require us to define the function symbol in the 5653 executable on a plt call stub. A dynamic reloc can 5654 be used instead. */ 5655 if (h->pointer_equality_needed 5656 && h->type != STT_GNU_IFUNC 5657 && !htab->is_vxworks 5658 && !ppc_elf_hash_entry (h)->has_sda_refs 5659 && !readonly_dynrelocs (h)) 5660 { 5661 h->pointer_equality_needed = 0; 5662 h->non_got_ref = 0; 5663 } 5664 5665 /* After adjust_dynamic_symbol, non_got_ref set in the 5666 non-shared case means that we have allocated space in 5667 .dynbss for the symbol and thus dyn_relocs for this 5668 symbol should be discarded. 5669 If we get here we know we are making a PLT entry for this 5670 symbol, and in an executable we'd normally resolve 5671 relocations against this symbol to the PLT entry. Allow 5672 dynamic relocs if the reference is weak, and the dynamic 5673 relocs will not cause text relocation. */ 5674 else if (!h->ref_regular_nonweak 5675 && h->non_got_ref 5676 && h->type != STT_GNU_IFUNC 5677 && !htab->is_vxworks 5678 && !ppc_elf_hash_entry (h)->has_sda_refs 5679 && !readonly_dynrelocs (h)) 5680 h->non_got_ref = 0; 5681 } 5682 h->protected_def = 0; 5683 return TRUE; 5684 } 5685 else 5686 h->plt.plist = NULL; 5687 5688 /* If this is a weak symbol, and there is a real definition, the 5689 processor independent code will have arranged for us to see the 5690 real definition first, and we can just use the same value. */ 5691 if (h->u.weakdef != NULL) 5692 { 5693 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 5694 || h->u.weakdef->root.type == bfd_link_hash_defweak); 5695 h->root.u.def.section = h->u.weakdef->root.u.def.section; 5696 h->root.u.def.value = h->u.weakdef->root.u.def.value; 5697 if (ELIMINATE_COPY_RELOCS) 5698 h->non_got_ref = h->u.weakdef->non_got_ref; 5699 return TRUE; 5700 } 5701 5702 /* This is a reference to a symbol defined by a dynamic object which 5703 is not a function. */ 5704 5705 /* If we are creating a shared library, we must presume that the 5706 only references to the symbol are via the global offset table. 5707 For such cases we need not do anything here; the relocations will 5708 be handled correctly by relocate_section. */ 5709 if (bfd_link_pic (info)) 5710 { 5711 h->protected_def = 0; 5712 return TRUE; 5713 } 5714 5715 /* If there are no references to this symbol that do not use the 5716 GOT, we don't need to generate a copy reloc. */ 5717 if (!h->non_got_ref) 5718 { 5719 h->protected_def = 0; 5720 return TRUE; 5721 } 5722 5723 /* Protected variables do not work with .dynbss. The copy in 5724 .dynbss won't be used by the shared library with the protected 5725 definition for the variable. Editing to PIC, or text relocations 5726 are preferable to an incorrect program. */ 5727 if (h->protected_def) 5728 { 5729 if (ELIMINATE_COPY_RELOCS 5730 && ppc_elf_hash_entry (h)->has_addr16_ha 5731 && ppc_elf_hash_entry (h)->has_addr16_lo 5732 && htab->params->pic_fixup == 0 5733 && info->disable_target_specific_optimizations <= 1) 5734 htab->params->pic_fixup = 1; 5735 h->non_got_ref = 0; 5736 return TRUE; 5737 } 5738 5739 /* If -z nocopyreloc was given, we won't generate them either. */ 5740 if (info->nocopyreloc) 5741 { 5742 h->non_got_ref = 0; 5743 return TRUE; 5744 } 5745 5746 /* If we didn't find any dynamic relocs in read-only sections, then 5747 we'll be keeping the dynamic relocs and avoiding the copy reloc. 5748 We can't do this if there are any small data relocations. This 5749 doesn't work on VxWorks, where we can not have dynamic 5750 relocations (other than copy and jump slot relocations) in an 5751 executable. */ 5752 if (ELIMINATE_COPY_RELOCS 5753 && !ppc_elf_hash_entry (h)->has_sda_refs 5754 && !htab->is_vxworks 5755 && !h->def_regular 5756 && !readonly_dynrelocs (h)) 5757 { 5758 h->non_got_ref = 0; 5759 return TRUE; 5760 } 5761 5762 /* We must allocate the symbol in our .dynbss section, which will 5763 become part of the .bss section of the executable. There will be 5764 an entry for this symbol in the .dynsym section. The dynamic 5765 object will contain position independent code, so all references 5766 from the dynamic object to this symbol will go through the global 5767 offset table. The dynamic linker will use the .dynsym entry to 5768 determine the address it must put in the global offset table, so 5769 both the dynamic object and the regular object will refer to the 5770 same memory location for the variable. 5771 5772 Of course, if the symbol is referenced using SDAREL relocs, we 5773 must instead allocate it in .sbss. */ 5774 5775 if (ppc_elf_hash_entry (h)->has_sda_refs) 5776 s = htab->dynsbss; 5777 else 5778 s = htab->dynbss; 5779 BFD_ASSERT (s != NULL); 5780 5781 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to 5782 copy the initial value out of the dynamic object and into the 5783 runtime process image. We need to remember the offset into the 5784 .rela.bss section we are going to use. */ 5785 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 5786 { 5787 asection *srel; 5788 5789 if (ppc_elf_hash_entry (h)->has_sda_refs) 5790 srel = htab->relsbss; 5791 else 5792 srel = htab->relbss; 5793 BFD_ASSERT (srel != NULL); 5794 srel->size += sizeof (Elf32_External_Rela); 5795 h->needs_copy = 1; 5796 } 5797 5798 return _bfd_elf_adjust_dynamic_copy (info, h, s); 5799 } 5800 5801 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is 5803 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, 5804 specifying the addend on the plt relocation. For -fpic code, the sym 5805 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC 5806 xxxxxxxx.got2.plt_pic32.<callee>. */ 5807 5808 static bfd_boolean 5809 add_stub_sym (struct plt_entry *ent, 5810 struct elf_link_hash_entry *h, 5811 struct bfd_link_info *info) 5812 { 5813 struct elf_link_hash_entry *sh; 5814 size_t len1, len2, len3; 5815 char *name; 5816 const char *stub; 5817 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 5818 5819 if (bfd_link_pic (info)) 5820 stub = ".plt_pic32."; 5821 else 5822 stub = ".plt_call32."; 5823 5824 len1 = strlen (h->root.root.string); 5825 len2 = strlen (stub); 5826 len3 = 0; 5827 if (ent->sec) 5828 len3 = strlen (ent->sec->name); 5829 name = bfd_malloc (len1 + len2 + len3 + 9); 5830 if (name == NULL) 5831 return FALSE; 5832 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); 5833 if (ent->sec) 5834 memcpy (name + 8, ent->sec->name, len3); 5835 memcpy (name + 8 + len3, stub, len2); 5836 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); 5837 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); 5838 if (sh == NULL) 5839 return FALSE; 5840 if (sh->root.type == bfd_link_hash_new) 5841 { 5842 sh->root.type = bfd_link_hash_defined; 5843 sh->root.u.def.section = htab->glink; 5844 sh->root.u.def.value = ent->glink_offset; 5845 sh->ref_regular = 1; 5846 sh->def_regular = 1; 5847 sh->ref_regular_nonweak = 1; 5848 sh->forced_local = 1; 5849 sh->non_elf = 0; 5850 sh->root.linker_def = 1; 5851 } 5852 return TRUE; 5853 } 5854 5855 /* Allocate NEED contiguous space in .got, and return the offset. 5856 Handles allocation of the got header when crossing 32k. */ 5857 5858 static bfd_vma 5859 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) 5860 { 5861 bfd_vma where; 5862 unsigned int max_before_header; 5863 5864 if (htab->plt_type == PLT_VXWORKS) 5865 { 5866 where = htab->got->size; 5867 htab->got->size += need; 5868 } 5869 else 5870 { 5871 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; 5872 if (need <= htab->got_gap) 5873 { 5874 where = max_before_header - htab->got_gap; 5875 htab->got_gap -= need; 5876 } 5877 else 5878 { 5879 if (htab->got->size + need > max_before_header 5880 && htab->got->size <= max_before_header) 5881 { 5882 htab->got_gap = max_before_header - htab->got->size; 5883 htab->got->size = max_before_header + htab->got_header_size; 5884 } 5885 where = htab->got->size; 5886 htab->got->size += need; 5887 } 5888 } 5889 return where; 5890 } 5891 5892 /* Allocate space in associated reloc sections for dynamic relocs. */ 5893 5894 static bfd_boolean 5895 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 5896 { 5897 struct bfd_link_info *info = inf; 5898 struct ppc_elf_link_hash_entry *eh; 5899 struct ppc_elf_link_hash_table *htab; 5900 struct elf_dyn_relocs *p; 5901 5902 if (h->root.type == bfd_link_hash_indirect) 5903 return TRUE; 5904 5905 htab = ppc_elf_hash_table (info); 5906 if (htab->elf.dynamic_sections_created 5907 || h->type == STT_GNU_IFUNC) 5908 { 5909 struct plt_entry *ent; 5910 bfd_boolean doneone = FALSE; 5911 bfd_vma plt_offset = 0, glink_offset = 0; 5912 bfd_boolean dyn; 5913 5914 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5915 if (ent->plt.refcount > 0) 5916 { 5917 /* Make sure this symbol is output as a dynamic symbol. */ 5918 if (h->dynindx == -1 5919 && !h->forced_local 5920 && !h->def_regular 5921 && htab->elf.dynamic_sections_created) 5922 { 5923 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 5924 return FALSE; 5925 } 5926 5927 dyn = htab->elf.dynamic_sections_created; 5928 if (bfd_link_pic (info) 5929 || h->type == STT_GNU_IFUNC 5930 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) 5931 { 5932 asection *s = htab->plt; 5933 if (!dyn || h->dynindx == -1) 5934 s = htab->iplt; 5935 5936 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1) 5937 { 5938 if (!doneone) 5939 { 5940 plt_offset = s->size; 5941 s->size += 4; 5942 } 5943 ent->plt.offset = plt_offset; 5944 5945 s = htab->glink; 5946 if (!doneone || bfd_link_pic (info)) 5947 { 5948 glink_offset = s->size; 5949 s->size += GLINK_ENTRY_SIZE; 5950 if (h == htab->tls_get_addr 5951 && !htab->params->no_tls_get_addr_opt) 5952 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE; 5953 } 5954 if (!doneone 5955 && !bfd_link_pic (info) 5956 && h->def_dynamic 5957 && !h->def_regular) 5958 { 5959 h->root.u.def.section = s; 5960 h->root.u.def.value = glink_offset; 5961 } 5962 ent->glink_offset = glink_offset; 5963 5964 if (htab->params->emit_stub_syms 5965 && !add_stub_sym (ent, h, info)) 5966 return FALSE; 5967 } 5968 else 5969 { 5970 if (!doneone) 5971 { 5972 /* If this is the first .plt entry, make room 5973 for the special first entry. */ 5974 if (s->size == 0) 5975 s->size += htab->plt_initial_entry_size; 5976 5977 /* The PowerPC PLT is actually composed of two 5978 parts, the first part is 2 words (for a load 5979 and a jump), and then there is a remaining 5980 word available at the end. */ 5981 plt_offset = (htab->plt_initial_entry_size 5982 + (htab->plt_slot_size 5983 * ((s->size 5984 - htab->plt_initial_entry_size) 5985 / htab->plt_entry_size))); 5986 5987 /* If this symbol is not defined in a regular 5988 file, and we are not generating a shared 5989 library, then set the symbol to this location 5990 in the .plt. This is to avoid text 5991 relocations, and is required to make 5992 function pointers compare as equal between 5993 the normal executable and the shared library. */ 5994 if (! bfd_link_pic (info) 5995 && h->def_dynamic 5996 && !h->def_regular) 5997 { 5998 h->root.u.def.section = s; 5999 h->root.u.def.value = plt_offset; 6000 } 6001 6002 /* Make room for this entry. */ 6003 s->size += htab->plt_entry_size; 6004 /* After the 8192nd entry, room for two entries 6005 is allocated. */ 6006 if (htab->plt_type == PLT_OLD 6007 && (s->size - htab->plt_initial_entry_size) 6008 / htab->plt_entry_size 6009 > PLT_NUM_SINGLE_ENTRIES) 6010 s->size += htab->plt_entry_size; 6011 } 6012 ent->plt.offset = plt_offset; 6013 } 6014 6015 /* We also need to make an entry in the .rela.plt section. */ 6016 if (!doneone) 6017 { 6018 if (!htab->elf.dynamic_sections_created 6019 || h->dynindx == -1) 6020 htab->reliplt->size += sizeof (Elf32_External_Rela); 6021 else 6022 { 6023 htab->relplt->size += sizeof (Elf32_External_Rela); 6024 6025 if (htab->plt_type == PLT_VXWORKS) 6026 { 6027 /* Allocate space for the unloaded relocations. */ 6028 if (!bfd_link_pic (info) 6029 && htab->elf.dynamic_sections_created) 6030 { 6031 if (ent->plt.offset 6032 == (bfd_vma) htab->plt_initial_entry_size) 6033 { 6034 htab->srelplt2->size 6035 += (sizeof (Elf32_External_Rela) 6036 * VXWORKS_PLTRESOLVE_RELOCS); 6037 } 6038 6039 htab->srelplt2->size 6040 += (sizeof (Elf32_External_Rela) 6041 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS); 6042 } 6043 6044 /* Every PLT entry has an associated GOT entry in 6045 .got.plt. */ 6046 htab->sgotplt->size += 4; 6047 } 6048 } 6049 doneone = TRUE; 6050 } 6051 } 6052 else 6053 ent->plt.offset = (bfd_vma) -1; 6054 } 6055 else 6056 ent->plt.offset = (bfd_vma) -1; 6057 6058 if (!doneone) 6059 { 6060 h->plt.plist = NULL; 6061 h->needs_plt = 0; 6062 } 6063 } 6064 else 6065 { 6066 h->plt.plist = NULL; 6067 h->needs_plt = 0; 6068 } 6069 6070 eh = (struct ppc_elf_link_hash_entry *) h; 6071 if (eh->elf.got.refcount > 0 6072 || (ELIMINATE_COPY_RELOCS 6073 && !eh->elf.def_regular 6074 && eh->elf.protected_def 6075 && eh->has_addr16_ha 6076 && eh->has_addr16_lo 6077 && htab->params->pic_fixup > 0)) 6078 { 6079 bfd_boolean dyn; 6080 unsigned int need; 6081 6082 /* Make sure this symbol is output as a dynamic symbol. */ 6083 if (eh->elf.dynindx == -1 6084 && !eh->elf.forced_local 6085 && eh->elf.type != STT_GNU_IFUNC 6086 && htab->elf.dynamic_sections_created) 6087 { 6088 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) 6089 return FALSE; 6090 } 6091 6092 need = 0; 6093 if ((eh->tls_mask & TLS_TLS) != 0) 6094 { 6095 if ((eh->tls_mask & TLS_LD) != 0) 6096 { 6097 if (!eh->elf.def_dynamic) 6098 /* We'll just use htab->tlsld_got.offset. This should 6099 always be the case. It's a little odd if we have 6100 a local dynamic reloc against a non-local symbol. */ 6101 htab->tlsld_got.refcount += 1; 6102 else 6103 need += 8; 6104 } 6105 if ((eh->tls_mask & TLS_GD) != 0) 6106 need += 8; 6107 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) 6108 need += 4; 6109 if ((eh->tls_mask & TLS_DTPREL) != 0) 6110 need += 4; 6111 } 6112 else 6113 need += 4; 6114 if (need == 0) 6115 eh->elf.got.offset = (bfd_vma) -1; 6116 else 6117 { 6118 eh->elf.got.offset = allocate_got (htab, need); 6119 dyn = htab->elf.dynamic_sections_created; 6120 if ((bfd_link_pic (info) 6121 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) 6122 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT 6123 || eh->elf.root.type != bfd_link_hash_undefweak)) 6124 { 6125 asection *rsec = htab->relgot; 6126 6127 if (eh->elf.type == STT_GNU_IFUNC) 6128 rsec = htab->reliplt; 6129 /* All the entries we allocated need relocs. 6130 Except LD only needs one. */ 6131 if ((eh->tls_mask & TLS_LD) != 0 6132 && eh->elf.def_dynamic) 6133 need -= 4; 6134 rsec->size += need * (sizeof (Elf32_External_Rela) / 4); 6135 } 6136 } 6137 } 6138 else 6139 eh->elf.got.offset = (bfd_vma) -1; 6140 6141 if (eh->dyn_relocs == NULL 6142 || !htab->elf.dynamic_sections_created) 6143 return TRUE; 6144 6145 /* In the shared -Bsymbolic case, discard space allocated for 6146 dynamic pc-relative relocs against symbols which turn out to be 6147 defined in regular objects. For the normal shared case, discard 6148 space for relocs that have become local due to symbol visibility 6149 changes. */ 6150 6151 if (bfd_link_pic (info)) 6152 { 6153 /* Relocs that use pc_count are those that appear on a call insn, 6154 or certain REL relocs (see must_be_dyn_reloc) that can be 6155 generated via assembly. We want calls to protected symbols to 6156 resolve directly to the function rather than going via the plt. 6157 If people want function pointer comparisons to work as expected 6158 then they should avoid writing weird assembly. */ 6159 if (SYMBOL_CALLS_LOCAL (info, h)) 6160 { 6161 struct elf_dyn_relocs **pp; 6162 6163 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 6164 { 6165 p->count -= p->pc_count; 6166 p->pc_count = 0; 6167 if (p->count == 0) 6168 *pp = p->next; 6169 else 6170 pp = &p->next; 6171 } 6172 } 6173 6174 if (htab->is_vxworks) 6175 { 6176 struct elf_dyn_relocs **pp; 6177 6178 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 6179 { 6180 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) 6181 *pp = p->next; 6182 else 6183 pp = &p->next; 6184 } 6185 } 6186 6187 /* Discard relocs on undefined symbols that must be local. */ 6188 if (eh->dyn_relocs != NULL 6189 && h->root.type == bfd_link_hash_undefined 6190 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 6191 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 6192 eh->dyn_relocs = NULL; 6193 6194 /* Also discard relocs on undefined weak syms with non-default 6195 visibility. */ 6196 if (eh->dyn_relocs != NULL 6197 && h->root.type == bfd_link_hash_undefweak) 6198 { 6199 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 6200 eh->dyn_relocs = NULL; 6201 6202 /* Make sure undefined weak symbols are output as a dynamic 6203 symbol in PIEs. */ 6204 else if (h->dynindx == -1 6205 && !h->forced_local 6206 && !h->def_regular) 6207 { 6208 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 6209 return FALSE; 6210 } 6211 } 6212 } 6213 else if (ELIMINATE_COPY_RELOCS) 6214 { 6215 /* For the non-shared case, discard space for relocs against 6216 symbols which turn out to need copy relocs or are not 6217 dynamic. */ 6218 6219 if (!h->non_got_ref 6220 && !h->def_regular 6221 && !(h->protected_def 6222 && eh->has_addr16_ha 6223 && eh->has_addr16_lo 6224 && htab->params->pic_fixup > 0)) 6225 { 6226 /* Make sure this symbol is output as a dynamic symbol. 6227 Undefined weak syms won't yet be marked as dynamic. */ 6228 if (h->dynindx == -1 6229 && !h->forced_local) 6230 { 6231 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 6232 return FALSE; 6233 } 6234 6235 /* If that succeeded, we know we'll be keeping all the 6236 relocs. */ 6237 if (h->dynindx != -1) 6238 goto keep; 6239 } 6240 6241 eh->dyn_relocs = NULL; 6242 6243 keep: ; 6244 } 6245 6246 /* Finally, allocate space. */ 6247 for (p = eh->dyn_relocs; p != NULL; p = p->next) 6248 { 6249 asection *sreloc = elf_section_data (p->sec)->sreloc; 6250 if (eh->elf.type == STT_GNU_IFUNC) 6251 sreloc = htab->reliplt; 6252 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6253 } 6254 6255 return TRUE; 6256 } 6257 6258 /* Set DF_TEXTREL if we find any dynamic relocs that apply to 6259 read-only sections. */ 6260 6261 static bfd_boolean 6262 maybe_set_textrel (struct elf_link_hash_entry *h, void *info) 6263 { 6264 if (h->root.type == bfd_link_hash_indirect) 6265 return TRUE; 6266 6267 if (readonly_dynrelocs (h)) 6268 { 6269 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; 6270 6271 /* Not an error, just cut short the traversal. */ 6272 return FALSE; 6273 } 6274 return TRUE; 6275 } 6276 6277 static const unsigned char glink_eh_frame_cie[] = 6278 { 6279 0, 0, 0, 16, /* length. */ 6280 0, 0, 0, 0, /* id. */ 6281 1, /* CIE version. */ 6282 'z', 'R', 0, /* Augmentation string. */ 6283 4, /* Code alignment. */ 6284 0x7c, /* Data alignment. */ 6285 65, /* RA reg. */ 6286 1, /* Augmentation size. */ 6287 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ 6288 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ 6289 }; 6290 6291 /* Set the sizes of the dynamic sections. */ 6292 6293 static bfd_boolean 6294 ppc_elf_size_dynamic_sections (bfd *output_bfd, 6295 struct bfd_link_info *info) 6296 { 6297 struct ppc_elf_link_hash_table *htab; 6298 asection *s; 6299 bfd_boolean relocs; 6300 bfd *ibfd; 6301 6302 #ifdef DEBUG 6303 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); 6304 #endif 6305 6306 htab = ppc_elf_hash_table (info); 6307 BFD_ASSERT (htab->elf.dynobj != NULL); 6308 6309 if (elf_hash_table (info)->dynamic_sections_created) 6310 { 6311 /* Set the contents of the .interp section to the interpreter. */ 6312 if (bfd_link_executable (info) && !info->nointerp) 6313 { 6314 s = bfd_get_linker_section (htab->elf.dynobj, ".interp"); 6315 BFD_ASSERT (s != NULL); 6316 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 6317 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 6318 } 6319 } 6320 6321 if (htab->plt_type == PLT_OLD) 6322 htab->got_header_size = 16; 6323 else if (htab->plt_type == PLT_NEW) 6324 htab->got_header_size = 12; 6325 6326 /* Set up .got offsets for local syms, and space for local dynamic 6327 relocs. */ 6328 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) 6329 { 6330 bfd_signed_vma *local_got; 6331 bfd_signed_vma *end_local_got; 6332 struct plt_entry **local_plt; 6333 struct plt_entry **end_local_plt; 6334 char *lgot_masks; 6335 bfd_size_type locsymcount; 6336 Elf_Internal_Shdr *symtab_hdr; 6337 6338 if (!is_ppc_elf (ibfd)) 6339 continue; 6340 6341 for (s = ibfd->sections; s != NULL; s = s->next) 6342 { 6343 struct ppc_dyn_relocs *p; 6344 6345 for (p = ((struct ppc_dyn_relocs *) 6346 elf_section_data (s)->local_dynrel); 6347 p != NULL; 6348 p = p->next) 6349 { 6350 if (!bfd_is_abs_section (p->sec) 6351 && bfd_is_abs_section (p->sec->output_section)) 6352 { 6353 /* Input section has been discarded, either because 6354 it is a copy of a linkonce section or due to 6355 linker script /DISCARD/, so we'll be discarding 6356 the relocs too. */ 6357 } 6358 else if (htab->is_vxworks 6359 && strcmp (p->sec->output_section->name, 6360 ".tls_vars") == 0) 6361 { 6362 /* Relocations in vxworks .tls_vars sections are 6363 handled specially by the loader. */ 6364 } 6365 else if (p->count != 0) 6366 { 6367 asection *sreloc = elf_section_data (p->sec)->sreloc; 6368 if (p->ifunc) 6369 sreloc = htab->reliplt; 6370 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6371 if ((p->sec->output_section->flags 6372 & (SEC_READONLY | SEC_ALLOC)) 6373 == (SEC_READONLY | SEC_ALLOC)) 6374 info->flags |= DF_TEXTREL; 6375 } 6376 } 6377 } 6378 6379 local_got = elf_local_got_refcounts (ibfd); 6380 if (!local_got) 6381 continue; 6382 6383 symtab_hdr = &elf_symtab_hdr (ibfd); 6384 locsymcount = symtab_hdr->sh_info; 6385 end_local_got = local_got + locsymcount; 6386 local_plt = (struct plt_entry **) end_local_got; 6387 end_local_plt = local_plt + locsymcount; 6388 lgot_masks = (char *) end_local_plt; 6389 6390 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 6391 if (*local_got > 0) 6392 { 6393 unsigned int need = 0; 6394 if ((*lgot_masks & TLS_TLS) != 0) 6395 { 6396 if ((*lgot_masks & TLS_GD) != 0) 6397 need += 8; 6398 if ((*lgot_masks & TLS_LD) != 0) 6399 htab->tlsld_got.refcount += 1; 6400 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) 6401 need += 4; 6402 if ((*lgot_masks & TLS_DTPREL) != 0) 6403 need += 4; 6404 } 6405 else 6406 need += 4; 6407 if (need == 0) 6408 *local_got = (bfd_vma) -1; 6409 else 6410 { 6411 *local_got = allocate_got (htab, need); 6412 if (bfd_link_pic (info)) 6413 { 6414 asection *srel = htab->relgot; 6415 if ((*lgot_masks & PLT_IFUNC) != 0) 6416 srel = htab->reliplt; 6417 srel->size += need * (sizeof (Elf32_External_Rela) / 4); 6418 } 6419 } 6420 } 6421 else 6422 *local_got = (bfd_vma) -1; 6423 6424 if (htab->is_vxworks) 6425 continue; 6426 6427 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ 6428 for (; local_plt < end_local_plt; ++local_plt) 6429 { 6430 struct plt_entry *ent; 6431 bfd_boolean doneone = FALSE; 6432 bfd_vma plt_offset = 0, glink_offset = 0; 6433 6434 for (ent = *local_plt; ent != NULL; ent = ent->next) 6435 if (ent->plt.refcount > 0) 6436 { 6437 s = htab->iplt; 6438 6439 if (!doneone) 6440 { 6441 plt_offset = s->size; 6442 s->size += 4; 6443 } 6444 ent->plt.offset = plt_offset; 6445 6446 s = htab->glink; 6447 if (!doneone || bfd_link_pic (info)) 6448 { 6449 glink_offset = s->size; 6450 s->size += GLINK_ENTRY_SIZE; 6451 } 6452 ent->glink_offset = glink_offset; 6453 6454 if (!doneone) 6455 { 6456 htab->reliplt->size += sizeof (Elf32_External_Rela); 6457 doneone = TRUE; 6458 } 6459 } 6460 else 6461 ent->plt.offset = (bfd_vma) -1; 6462 } 6463 } 6464 6465 /* Allocate space for global sym dynamic relocs. */ 6466 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 6467 6468 if (htab->tlsld_got.refcount > 0) 6469 { 6470 htab->tlsld_got.offset = allocate_got (htab, 8); 6471 if (bfd_link_pic (info)) 6472 htab->relgot->size += sizeof (Elf32_External_Rela); 6473 } 6474 else 6475 htab->tlsld_got.offset = (bfd_vma) -1; 6476 6477 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) 6478 { 6479 unsigned int g_o_t = 32768; 6480 6481 /* If we haven't allocated the header, do so now. When we get here, 6482 for old plt/got the got size will be 0 to 32764 (not allocated), 6483 or 32780 to 65536 (header allocated). For new plt/got, the 6484 corresponding ranges are 0 to 32768 and 32780 to 65536. */ 6485 if (htab->got->size <= 32768) 6486 { 6487 g_o_t = htab->got->size; 6488 if (htab->plt_type == PLT_OLD) 6489 g_o_t += 4; 6490 htab->got->size += htab->got_header_size; 6491 } 6492 6493 htab->elf.hgot->root.u.def.value = g_o_t; 6494 } 6495 if (bfd_link_pic (info)) 6496 { 6497 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 6498 6499 sda->root.u.def.section = htab->elf.hgot->root.u.def.section; 6500 sda->root.u.def.value = htab->elf.hgot->root.u.def.value; 6501 } 6502 if (info->emitrelocations) 6503 { 6504 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 6505 6506 if (sda != NULL && sda->ref_regular) 6507 sda->root.u.def.section->flags |= SEC_KEEP; 6508 sda = htab->sdata[1].sym; 6509 if (sda != NULL && sda->ref_regular) 6510 sda->root.u.def.section->flags |= SEC_KEEP; 6511 } 6512 6513 if (htab->glink != NULL 6514 && htab->glink->size != 0 6515 && htab->elf.dynamic_sections_created) 6516 { 6517 htab->glink_pltresolve = htab->glink->size; 6518 /* Space for the branch table. */ 6519 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; 6520 /* Pad out to align the start of PLTresolve. */ 6521 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround 6522 ? 63 : 15); 6523 htab->glink->size += GLINK_PLTRESOLVE; 6524 6525 if (htab->params->emit_stub_syms) 6526 { 6527 struct elf_link_hash_entry *sh; 6528 sh = elf_link_hash_lookup (&htab->elf, "__glink", 6529 TRUE, FALSE, FALSE); 6530 if (sh == NULL) 6531 return FALSE; 6532 if (sh->root.type == bfd_link_hash_new) 6533 { 6534 sh->root.type = bfd_link_hash_defined; 6535 sh->root.u.def.section = htab->glink; 6536 sh->root.u.def.value = htab->glink_pltresolve; 6537 sh->ref_regular = 1; 6538 sh->def_regular = 1; 6539 sh->ref_regular_nonweak = 1; 6540 sh->forced_local = 1; 6541 sh->non_elf = 0; 6542 sh->root.linker_def = 1; 6543 } 6544 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", 6545 TRUE, FALSE, FALSE); 6546 if (sh == NULL) 6547 return FALSE; 6548 if (sh->root.type == bfd_link_hash_new) 6549 { 6550 sh->root.type = bfd_link_hash_defined; 6551 sh->root.u.def.section = htab->glink; 6552 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; 6553 sh->ref_regular = 1; 6554 sh->def_regular = 1; 6555 sh->ref_regular_nonweak = 1; 6556 sh->forced_local = 1; 6557 sh->non_elf = 0; 6558 sh->root.linker_def = 1; 6559 } 6560 } 6561 } 6562 6563 if (htab->glink != NULL 6564 && htab->glink->size != 0 6565 && htab->glink_eh_frame != NULL 6566 && !bfd_is_abs_section (htab->glink_eh_frame->output_section) 6567 && _bfd_elf_eh_frame_present (info)) 6568 { 6569 s = htab->glink_eh_frame; 6570 s->size = sizeof (glink_eh_frame_cie) + 20; 6571 if (bfd_link_pic (info)) 6572 { 6573 s->size += 4; 6574 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256) 6575 s->size += 4; 6576 } 6577 } 6578 6579 /* We've now determined the sizes of the various dynamic sections. 6580 Allocate memory for them. */ 6581 relocs = FALSE; 6582 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) 6583 { 6584 bfd_boolean strip_section = TRUE; 6585 6586 if ((s->flags & SEC_LINKER_CREATED) == 0) 6587 continue; 6588 6589 if (s == htab->plt 6590 || s == htab->got) 6591 { 6592 /* We'd like to strip these sections if they aren't needed, but if 6593 we've exported dynamic symbols from them we must leave them. 6594 It's too late to tell BFD to get rid of the symbols. */ 6595 if (htab->elf.hplt != NULL) 6596 strip_section = FALSE; 6597 /* Strip this section if we don't need it; see the 6598 comment below. */ 6599 } 6600 else if (s == htab->iplt 6601 || s == htab->glink 6602 || s == htab->glink_eh_frame 6603 || s == htab->sgotplt 6604 || s == htab->sbss 6605 || s == htab->dynbss 6606 || s == htab->dynsbss) 6607 { 6608 /* Strip these too. */ 6609 } 6610 else if (s == htab->sdata[0].section 6611 || s == htab->sdata[1].section) 6612 { 6613 strip_section = (s->flags & SEC_KEEP) == 0; 6614 } 6615 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s), 6616 ".rela")) 6617 { 6618 if (s->size != 0) 6619 { 6620 /* Remember whether there are any relocation sections. */ 6621 relocs = TRUE; 6622 6623 /* We use the reloc_count field as a counter if we need 6624 to copy relocs into the output file. */ 6625 s->reloc_count = 0; 6626 } 6627 } 6628 else 6629 { 6630 /* It's not one of our sections, so don't allocate space. */ 6631 continue; 6632 } 6633 6634 if (s->size == 0 && strip_section) 6635 { 6636 /* If we don't need this section, strip it from the 6637 output file. This is mostly to handle .rela.bss and 6638 .rela.plt. We must create both sections in 6639 create_dynamic_sections, because they must be created 6640 before the linker maps input sections to output 6641 sections. The linker does that before 6642 adjust_dynamic_symbol is called, and it is that 6643 function which decides whether anything needs to go 6644 into these sections. */ 6645 s->flags |= SEC_EXCLUDE; 6646 continue; 6647 } 6648 6649 if ((s->flags & SEC_HAS_CONTENTS) == 0) 6650 continue; 6651 6652 /* Allocate memory for the section contents. */ 6653 s->contents = bfd_zalloc (htab->elf.dynobj, s->size); 6654 if (s->contents == NULL) 6655 return FALSE; 6656 } 6657 6658 if (htab->elf.dynamic_sections_created) 6659 { 6660 /* Add some entries to the .dynamic section. We fill in the 6661 values later, in ppc_elf_finish_dynamic_sections, but we 6662 must add the entries now so that we get the correct size for 6663 the .dynamic section. The DT_DEBUG entry is filled in by the 6664 dynamic linker and used by the debugger. */ 6665 #define add_dynamic_entry(TAG, VAL) \ 6666 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 6667 6668 if (bfd_link_executable (info)) 6669 { 6670 if (!add_dynamic_entry (DT_DEBUG, 0)) 6671 return FALSE; 6672 } 6673 6674 if (htab->plt != NULL && htab->plt->size != 0) 6675 { 6676 if (!add_dynamic_entry (DT_PLTGOT, 0) 6677 || !add_dynamic_entry (DT_PLTRELSZ, 0) 6678 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 6679 || !add_dynamic_entry (DT_JMPREL, 0)) 6680 return FALSE; 6681 } 6682 6683 if (htab->plt_type == PLT_NEW 6684 && htab->glink != NULL 6685 && htab->glink->size != 0) 6686 { 6687 if (!add_dynamic_entry (DT_PPC_GOT, 0)) 6688 return FALSE; 6689 if (!htab->params->no_tls_get_addr_opt 6690 && htab->tls_get_addr != NULL 6691 && htab->tls_get_addr->plt.plist != NULL 6692 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS)) 6693 return FALSE; 6694 } 6695 6696 if (relocs) 6697 { 6698 if (!add_dynamic_entry (DT_RELA, 0) 6699 || !add_dynamic_entry (DT_RELASZ, 0) 6700 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 6701 return FALSE; 6702 } 6703 6704 /* If any dynamic relocs apply to a read-only section, then we 6705 need a DT_TEXTREL entry. */ 6706 if ((info->flags & DF_TEXTREL) == 0) 6707 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel, 6708 info); 6709 6710 if ((info->flags & DF_TEXTREL) != 0) 6711 { 6712 if (!add_dynamic_entry (DT_TEXTREL, 0)) 6713 return FALSE; 6714 } 6715 if (htab->is_vxworks 6716 && !elf_vxworks_add_dynamic_entries (output_bfd, info)) 6717 return FALSE; 6718 } 6719 #undef add_dynamic_entry 6720 6721 if (htab->glink_eh_frame != NULL 6722 && htab->glink_eh_frame->contents != NULL) 6723 { 6724 unsigned char *p = htab->glink_eh_frame->contents; 6725 bfd_vma val; 6726 6727 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); 6728 /* CIE length (rewrite in case little-endian). */ 6729 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p); 6730 p += sizeof (glink_eh_frame_cie); 6731 /* FDE length. */ 6732 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie); 6733 bfd_put_32 (htab->elf.dynobj, val, p); 6734 p += 4; 6735 /* CIE pointer. */ 6736 val = p - htab->glink_eh_frame->contents; 6737 bfd_put_32 (htab->elf.dynobj, val, p); 6738 p += 4; 6739 /* Offset to .glink. Set later. */ 6740 p += 4; 6741 /* .glink size. */ 6742 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p); 6743 p += 4; 6744 /* Augmentation. */ 6745 p += 1; 6746 6747 if (bfd_link_pic (info) 6748 && htab->elf.dynamic_sections_created) 6749 { 6750 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2; 6751 if (adv < 64) 6752 *p++ = DW_CFA_advance_loc + adv; 6753 else if (adv < 256) 6754 { 6755 *p++ = DW_CFA_advance_loc1; 6756 *p++ = adv; 6757 } 6758 else if (adv < 65536) 6759 { 6760 *p++ = DW_CFA_advance_loc2; 6761 bfd_put_16 (htab->elf.dynobj, adv, p); 6762 p += 2; 6763 } 6764 else 6765 { 6766 *p++ = DW_CFA_advance_loc4; 6767 bfd_put_32 (htab->elf.dynobj, adv, p); 6768 p += 4; 6769 } 6770 *p++ = DW_CFA_register; 6771 *p++ = 65; 6772 p++; 6773 *p++ = DW_CFA_advance_loc + 4; 6774 *p++ = DW_CFA_restore_extended; 6775 *p++ = 65; 6776 } 6777 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4) 6778 == htab->glink_eh_frame->size); 6779 } 6780 6781 return TRUE; 6782 } 6783 6784 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output 6785 if it looks like nothing is using them. */ 6786 6787 static void 6788 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect) 6789 { 6790 struct elf_link_hash_entry *sda = lsect->sym; 6791 6792 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1) 6793 { 6794 asection *s; 6795 6796 s = bfd_get_section_by_name (output_bfd, lsect->name); 6797 if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) 6798 { 6799 s = bfd_get_section_by_name (output_bfd, lsect->bss_name); 6800 if (s == NULL || bfd_section_removed_from_list (output_bfd, s)) 6801 { 6802 sda->def_regular = 0; 6803 /* This is somewhat magic. See elf_link_output_extsym. */ 6804 sda->ref_dynamic = 1; 6805 sda->forced_local = 0; 6806 } 6807 } 6808 } 6809 } 6810 6811 void 6812 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info) 6813 { 6814 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 6815 6816 if (htab != NULL) 6817 { 6818 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]); 6819 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]); 6820 } 6821 } 6822 6823 6824 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 6825 6826 static bfd_boolean 6827 ppc_elf_hash_symbol (struct elf_link_hash_entry *h) 6828 { 6829 if (h->plt.plist != NULL 6830 && !h->def_regular 6831 && (!h->pointer_equality_needed 6832 || !h->ref_regular_nonweak)) 6833 return FALSE; 6834 6835 return _bfd_elf_hash_symbol (h); 6836 } 6837 6838 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 6840 6841 /* Relaxation trampolines. r12 is available for clobbering (r11, is 6842 used for some functions that are allowed to break the ABI). */ 6843 static const int shared_stub_entry[] = 6844 { 6845 0x7c0802a6, /* mflr 0 */ 6846 0x429f0005, /* bcl 20, 31, .Lxxx */ 6847 0x7d8802a6, /* mflr 12 */ 6848 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */ 6849 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */ 6850 0x7c0803a6, /* mtlr 0 */ 6851 0x7d8903a6, /* mtctr 12 */ 6852 0x4e800420, /* bctr */ 6853 }; 6854 6855 static const int stub_entry[] = 6856 { 6857 0x3d800000, /* lis 12,xxx@ha */ 6858 0x398c0000, /* addi 12,12,xxx@l */ 6859 0x7d8903a6, /* mtctr 12 */ 6860 0x4e800420, /* bctr */ 6861 }; 6862 6863 struct ppc_elf_relax_info 6864 { 6865 unsigned int workaround_size; 6866 unsigned int picfixup_size; 6867 }; 6868 6869 /* This function implements long branch trampolines, and the ppc476 6870 icache bug workaround. Any section needing trampolines or patch 6871 space for the workaround has its size extended so that we can 6872 add trampolines at the end of the section. */ 6873 6874 static bfd_boolean 6875 ppc_elf_relax_section (bfd *abfd, 6876 asection *isec, 6877 struct bfd_link_info *link_info, 6878 bfd_boolean *again) 6879 { 6880 struct one_branch_fixup 6881 { 6882 struct one_branch_fixup *next; 6883 asection *tsec; 6884 /* Final link, can use the symbol offset. For a 6885 relocatable link we use the symbol's index. */ 6886 bfd_vma toff; 6887 bfd_vma trampoff; 6888 }; 6889 6890 Elf_Internal_Shdr *symtab_hdr; 6891 bfd_byte *contents = NULL; 6892 Elf_Internal_Sym *isymbuf = NULL; 6893 Elf_Internal_Rela *internal_relocs = NULL; 6894 Elf_Internal_Rela *irel, *irelend = NULL; 6895 struct one_branch_fixup *branch_fixups = NULL; 6896 struct ppc_elf_relax_info *relax_info = NULL; 6897 unsigned changes = 0; 6898 bfd_boolean workaround_change; 6899 struct ppc_elf_link_hash_table *htab; 6900 bfd_size_type trampbase, trampoff, newsize, picfixup_size; 6901 asection *got2; 6902 bfd_boolean maybe_pasted; 6903 6904 *again = FALSE; 6905 6906 /* No need to do anything with non-alloc or non-code sections. */ 6907 if ((isec->flags & SEC_ALLOC) == 0 6908 || (isec->flags & SEC_CODE) == 0 6909 || (isec->flags & SEC_LINKER_CREATED) != 0 6910 || isec->size < 4) 6911 return TRUE; 6912 6913 /* We cannot represent the required PIC relocs in the output, so don't 6914 do anything. The linker doesn't support mixing -shared and -r 6915 anyway. */ 6916 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info)) 6917 return TRUE; 6918 6919 htab = ppc_elf_hash_table (link_info); 6920 if (htab == NULL) 6921 return TRUE; 6922 6923 isec->size = (isec->size + 3) & -4; 6924 if (isec->rawsize == 0) 6925 isec->rawsize = isec->size; 6926 trampbase = isec->size; 6927 6928 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE 6929 || isec->sec_info_type == SEC_INFO_TYPE_TARGET); 6930 isec->sec_info_type = SEC_INFO_TYPE_TARGET; 6931 6932 if (htab->params->ppc476_workaround 6933 || htab->params->pic_fixup > 0) 6934 { 6935 if (elf_section_data (isec)->sec_info == NULL) 6936 { 6937 elf_section_data (isec)->sec_info 6938 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info)); 6939 if (elf_section_data (isec)->sec_info == NULL) 6940 return FALSE; 6941 } 6942 relax_info = elf_section_data (isec)->sec_info; 6943 trampbase -= relax_info->workaround_size; 6944 } 6945 6946 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0 6947 || strcmp (isec->output_section->name, ".fini") == 0); 6948 /* Space for a branch around any trampolines. */ 6949 trampoff = trampbase; 6950 if (maybe_pasted && trampbase == isec->rawsize) 6951 trampoff += 4; 6952 6953 symtab_hdr = &elf_symtab_hdr (abfd); 6954 picfixup_size = 0; 6955 if (htab->params->branch_trampolines 6956 || htab->params->pic_fixup > 0) 6957 { 6958 /* Get a copy of the native relocations. */ 6959 if (isec->reloc_count != 0) 6960 { 6961 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, 6962 link_info->keep_memory); 6963 if (internal_relocs == NULL) 6964 goto error_return; 6965 } 6966 6967 got2 = bfd_get_section_by_name (abfd, ".got2"); 6968 6969 irelend = internal_relocs + isec->reloc_count; 6970 for (irel = internal_relocs; irel < irelend; irel++) 6971 { 6972 unsigned long r_type = ELF32_R_TYPE (irel->r_info); 6973 bfd_vma toff, roff; 6974 asection *tsec; 6975 struct one_branch_fixup *f; 6976 size_t insn_offset = 0; 6977 bfd_vma max_branch_offset = 0, val; 6978 bfd_byte *hit_addr; 6979 unsigned long t0; 6980 struct elf_link_hash_entry *h; 6981 struct plt_entry **plist; 6982 unsigned char sym_type; 6983 6984 switch (r_type) 6985 { 6986 case R_PPC_REL24: 6987 case R_PPC_LOCAL24PC: 6988 case R_PPC_PLTREL24: 6989 max_branch_offset = 1 << 25; 6990 break; 6991 6992 case R_PPC_REL14: 6993 case R_PPC_REL14_BRTAKEN: 6994 case R_PPC_REL14_BRNTAKEN: 6995 max_branch_offset = 1 << 15; 6996 break; 6997 6998 case R_PPC_ADDR16_HA: 6999 if (htab->params->pic_fixup > 0) 7000 break; 7001 continue; 7002 7003 default: 7004 continue; 7005 } 7006 7007 /* Get the value of the symbol referred to by the reloc. */ 7008 h = NULL; 7009 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 7010 { 7011 /* A local symbol. */ 7012 Elf_Internal_Sym *isym; 7013 7014 /* Read this BFD's local symbols. */ 7015 if (isymbuf == NULL) 7016 { 7017 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 7018 if (isymbuf == NULL) 7019 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 7020 symtab_hdr->sh_info, 0, 7021 NULL, NULL, NULL); 7022 if (isymbuf == 0) 7023 goto error_return; 7024 } 7025 isym = isymbuf + ELF32_R_SYM (irel->r_info); 7026 if (isym->st_shndx == SHN_UNDEF) 7027 tsec = bfd_und_section_ptr; 7028 else if (isym->st_shndx == SHN_ABS) 7029 tsec = bfd_abs_section_ptr; 7030 else if (isym->st_shndx == SHN_COMMON) 7031 tsec = bfd_com_section_ptr; 7032 else 7033 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 7034 7035 toff = isym->st_value; 7036 sym_type = ELF_ST_TYPE (isym->st_info); 7037 } 7038 else 7039 { 7040 /* Global symbol handling. */ 7041 unsigned long indx; 7042 7043 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 7044 h = elf_sym_hashes (abfd)[indx]; 7045 7046 while (h->root.type == bfd_link_hash_indirect 7047 || h->root.type == bfd_link_hash_warning) 7048 h = (struct elf_link_hash_entry *) h->root.u.i.link; 7049 7050 if (h->root.type == bfd_link_hash_defined 7051 || h->root.type == bfd_link_hash_defweak) 7052 { 7053 tsec = h->root.u.def.section; 7054 toff = h->root.u.def.value; 7055 } 7056 else if (h->root.type == bfd_link_hash_undefined 7057 || h->root.type == bfd_link_hash_undefweak) 7058 { 7059 tsec = bfd_und_section_ptr; 7060 toff = bfd_link_relocatable (link_info) ? indx : 0; 7061 } 7062 else 7063 continue; 7064 7065 /* If this branch is to __tls_get_addr then we may later 7066 optimise away the call. We won't be needing a long- 7067 branch stub in that case. */ 7068 if (bfd_link_executable (link_info) 7069 && h == htab->tls_get_addr 7070 && irel != internal_relocs) 7071 { 7072 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info); 7073 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info); 7074 unsigned int tls_mask = 0; 7075 7076 /* The previous reloc should be one of R_PPC_TLSGD or 7077 R_PPC_TLSLD, or for older object files, a reloc 7078 on the __tls_get_addr arg setup insn. Get tls 7079 mask bits from the symbol on that reloc. */ 7080 if (t_symndx < symtab_hdr->sh_info) 7081 { 7082 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); 7083 7084 if (local_got_offsets != NULL) 7085 { 7086 struct plt_entry **local_plt = (struct plt_entry **) 7087 (local_got_offsets + symtab_hdr->sh_info); 7088 char *lgot_masks = (char *) 7089 (local_plt + symtab_hdr->sh_info); 7090 tls_mask = lgot_masks[t_symndx]; 7091 } 7092 } 7093 else 7094 { 7095 struct elf_link_hash_entry *th 7096 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info]; 7097 7098 while (th->root.type == bfd_link_hash_indirect 7099 || th->root.type == bfd_link_hash_warning) 7100 th = (struct elf_link_hash_entry *) th->root.u.i.link; 7101 7102 tls_mask 7103 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask; 7104 } 7105 7106 /* The mask bits tell us if the call will be 7107 optimised away. */ 7108 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 7109 && (t_rtype == R_PPC_TLSGD 7110 || t_rtype == R_PPC_GOT_TLSGD16 7111 || t_rtype == R_PPC_GOT_TLSGD16_LO)) 7112 continue; 7113 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 7114 && (t_rtype == R_PPC_TLSLD 7115 || t_rtype == R_PPC_GOT_TLSLD16 7116 || t_rtype == R_PPC_GOT_TLSLD16_LO)) 7117 continue; 7118 } 7119 7120 sym_type = h->type; 7121 } 7122 7123 if (r_type == R_PPC_ADDR16_HA) 7124 { 7125 if (h != NULL 7126 && !h->def_regular 7127 && h->protected_def 7128 && ppc_elf_hash_entry (h)->has_addr16_ha 7129 && ppc_elf_hash_entry (h)->has_addr16_lo) 7130 picfixup_size += 12; 7131 continue; 7132 } 7133 7134 /* The condition here under which we call find_plt_ent must 7135 match that in relocate_section. If we call find_plt_ent here 7136 but not in relocate_section, or vice versa, then the branch 7137 destination used here may be incorrect. */ 7138 plist = NULL; 7139 if (h != NULL) 7140 { 7141 /* We know is_branch_reloc (r_type) is true. */ 7142 if (h->type == STT_GNU_IFUNC 7143 || r_type == R_PPC_PLTREL24) 7144 plist = &h->plt.plist; 7145 } 7146 else if (sym_type == STT_GNU_IFUNC 7147 && elf_local_got_offsets (abfd) != NULL) 7148 { 7149 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); 7150 struct plt_entry **local_plt = (struct plt_entry **) 7151 (local_got_offsets + symtab_hdr->sh_info); 7152 plist = local_plt + ELF32_R_SYM (irel->r_info); 7153 } 7154 if (plist != NULL) 7155 { 7156 bfd_vma addend = 0; 7157 struct plt_entry *ent; 7158 7159 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info)) 7160 addend = irel->r_addend; 7161 ent = find_plt_ent (plist, got2, addend); 7162 if (ent != NULL) 7163 { 7164 if (htab->plt_type == PLT_NEW 7165 || h == NULL 7166 || !htab->elf.dynamic_sections_created 7167 || h->dynindx == -1) 7168 { 7169 tsec = htab->glink; 7170 toff = ent->glink_offset; 7171 } 7172 else 7173 { 7174 tsec = htab->plt; 7175 toff = ent->plt.offset; 7176 } 7177 } 7178 } 7179 7180 /* If the branch and target are in the same section, you have 7181 no hope of adding stubs. We'll error out later should the 7182 branch overflow. */ 7183 if (tsec == isec) 7184 continue; 7185 7186 /* There probably isn't any reason to handle symbols in 7187 SEC_MERGE sections; SEC_MERGE doesn't seem a likely 7188 attribute for a code section, and we are only looking at 7189 branches. However, implement it correctly here as a 7190 reference for other target relax_section functions. */ 7191 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE) 7192 { 7193 /* At this stage in linking, no SEC_MERGE symbol has been 7194 adjusted, so all references to such symbols need to be 7195 passed through _bfd_merged_section_offset. (Later, in 7196 relocate_section, all SEC_MERGE symbols *except* for 7197 section symbols have been adjusted.) 7198 7199 gas may reduce relocations against symbols in SEC_MERGE 7200 sections to a relocation against the section symbol when 7201 the original addend was zero. When the reloc is against 7202 a section symbol we should include the addend in the 7203 offset passed to _bfd_merged_section_offset, since the 7204 location of interest is the original symbol. On the 7205 other hand, an access to "sym+addend" where "sym" is not 7206 a section symbol should not include the addend; Such an 7207 access is presumed to be an offset from "sym"; The 7208 location of interest is just "sym". */ 7209 if (sym_type == STT_SECTION) 7210 toff += irel->r_addend; 7211 7212 toff 7213 = _bfd_merged_section_offset (abfd, &tsec, 7214 elf_section_data (tsec)->sec_info, 7215 toff); 7216 7217 if (sym_type != STT_SECTION) 7218 toff += irel->r_addend; 7219 } 7220 /* PLTREL24 addends are special. */ 7221 else if (r_type != R_PPC_PLTREL24) 7222 toff += irel->r_addend; 7223 7224 /* Attempted -shared link of non-pic code loses. */ 7225 if ((!bfd_link_relocatable (link_info) 7226 && tsec == bfd_und_section_ptr) 7227 || tsec->output_section == NULL 7228 || (tsec->owner != NULL 7229 && (tsec->owner->flags & BFD_PLUGIN) != 0)) 7230 continue; 7231 7232 roff = irel->r_offset; 7233 7234 /* If the branch is in range, no need to do anything. */ 7235 if (tsec != bfd_und_section_ptr 7236 && (!bfd_link_relocatable (link_info) 7237 /* A relocatable link may have sections moved during 7238 final link, so do not presume they remain in range. */ 7239 || tsec->output_section == isec->output_section)) 7240 { 7241 bfd_vma symaddr, reladdr; 7242 7243 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 7244 reladdr = isec->output_section->vma + isec->output_offset + roff; 7245 if (symaddr - reladdr + max_branch_offset 7246 < 2 * max_branch_offset) 7247 continue; 7248 } 7249 7250 /* Look for an existing fixup to this address. */ 7251 for (f = branch_fixups; f ; f = f->next) 7252 if (f->tsec == tsec && f->toff == toff) 7253 break; 7254 7255 if (f == NULL) 7256 { 7257 size_t size; 7258 unsigned long stub_rtype; 7259 7260 val = trampoff - roff; 7261 if (val >= max_branch_offset) 7262 /* Oh dear, we can't reach a trampoline. Don't try to add 7263 one. We'll report an error later. */ 7264 continue; 7265 7266 if (bfd_link_pic (link_info)) 7267 { 7268 size = 4 * ARRAY_SIZE (shared_stub_entry); 7269 insn_offset = 12; 7270 } 7271 else 7272 { 7273 size = 4 * ARRAY_SIZE (stub_entry); 7274 insn_offset = 0; 7275 } 7276 stub_rtype = R_PPC_RELAX; 7277 if (tsec == htab->plt 7278 || tsec == htab->glink) 7279 { 7280 stub_rtype = R_PPC_RELAX_PLT; 7281 if (r_type == R_PPC_PLTREL24) 7282 stub_rtype = R_PPC_RELAX_PLTREL24; 7283 } 7284 7285 /* Hijack the old relocation. Since we need two 7286 relocations for this use a "composite" reloc. */ 7287 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 7288 stub_rtype); 7289 irel->r_offset = trampoff + insn_offset; 7290 if (r_type == R_PPC_PLTREL24 7291 && stub_rtype != R_PPC_RELAX_PLTREL24) 7292 irel->r_addend = 0; 7293 7294 /* Record the fixup so we don't do it again this section. */ 7295 f = bfd_malloc (sizeof (*f)); 7296 f->next = branch_fixups; 7297 f->tsec = tsec; 7298 f->toff = toff; 7299 f->trampoff = trampoff; 7300 branch_fixups = f; 7301 7302 trampoff += size; 7303 changes++; 7304 } 7305 else 7306 { 7307 val = f->trampoff - roff; 7308 if (val >= max_branch_offset) 7309 continue; 7310 7311 /* Nop out the reloc, since we're finalizing things here. */ 7312 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 7313 } 7314 7315 /* Get the section contents. */ 7316 if (contents == NULL) 7317 { 7318 /* Get cached copy if it exists. */ 7319 if (elf_section_data (isec)->this_hdr.contents != NULL) 7320 contents = elf_section_data (isec)->this_hdr.contents; 7321 /* Go get them off disk. */ 7322 else if (!bfd_malloc_and_get_section (abfd, isec, &contents)) 7323 goto error_return; 7324 } 7325 7326 /* Fix up the existing branch to hit the trampoline. */ 7327 hit_addr = contents + roff; 7328 switch (r_type) 7329 { 7330 case R_PPC_REL24: 7331 case R_PPC_LOCAL24PC: 7332 case R_PPC_PLTREL24: 7333 t0 = bfd_get_32 (abfd, hit_addr); 7334 t0 &= ~0x3fffffc; 7335 t0 |= val & 0x3fffffc; 7336 bfd_put_32 (abfd, t0, hit_addr); 7337 break; 7338 7339 case R_PPC_REL14: 7340 case R_PPC_REL14_BRTAKEN: 7341 case R_PPC_REL14_BRNTAKEN: 7342 t0 = bfd_get_32 (abfd, hit_addr); 7343 t0 &= ~0xfffc; 7344 t0 |= val & 0xfffc; 7345 bfd_put_32 (abfd, t0, hit_addr); 7346 break; 7347 } 7348 } 7349 7350 while (branch_fixups != NULL) 7351 { 7352 struct one_branch_fixup *f = branch_fixups; 7353 branch_fixups = branch_fixups->next; 7354 free (f); 7355 } 7356 } 7357 7358 workaround_change = FALSE; 7359 newsize = trampoff; 7360 if (htab->params->ppc476_workaround 7361 && (!bfd_link_relocatable (link_info) 7362 || isec->output_section->alignment_power >= htab->params->pagesize_p2)) 7363 { 7364 bfd_vma addr, end_addr; 7365 unsigned int crossings; 7366 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 7367 7368 addr = isec->output_section->vma + isec->output_offset; 7369 end_addr = addr + trampoff; 7370 addr &= -pagesize; 7371 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2; 7372 if (crossings != 0) 7373 { 7374 /* Keep space aligned, to ensure the patch code itself does 7375 not cross a page. Don't decrease size calculated on a 7376 previous pass as otherwise we might never settle on a layout. */ 7377 newsize = 15 - ((end_addr - 1) & 15); 7378 newsize += crossings * 16; 7379 if (relax_info->workaround_size < newsize) 7380 { 7381 relax_info->workaround_size = newsize; 7382 workaround_change = TRUE; 7383 } 7384 /* Ensure relocate_section is called. */ 7385 isec->flags |= SEC_RELOC; 7386 } 7387 newsize = trampoff + relax_info->workaround_size; 7388 } 7389 7390 if (htab->params->pic_fixup > 0) 7391 { 7392 picfixup_size -= relax_info->picfixup_size; 7393 if (picfixup_size != 0) 7394 relax_info->picfixup_size += picfixup_size; 7395 newsize += relax_info->picfixup_size; 7396 } 7397 7398 if (changes != 0 || picfixup_size != 0 || workaround_change) 7399 isec->size = newsize; 7400 7401 if (isymbuf != NULL 7402 && symtab_hdr->contents != (unsigned char *) isymbuf) 7403 { 7404 if (! link_info->keep_memory) 7405 free (isymbuf); 7406 else 7407 { 7408 /* Cache the symbols for elf_link_input_bfd. */ 7409 symtab_hdr->contents = (unsigned char *) isymbuf; 7410 } 7411 } 7412 7413 if (contents != NULL 7414 && elf_section_data (isec)->this_hdr.contents != contents) 7415 { 7416 if (!changes && !link_info->keep_memory) 7417 free (contents); 7418 else 7419 { 7420 /* Cache the section contents for elf_link_input_bfd. */ 7421 elf_section_data (isec)->this_hdr.contents = contents; 7422 } 7423 } 7424 7425 changes += picfixup_size; 7426 if (changes != 0) 7427 { 7428 /* Append sufficient NOP relocs so we can write out relocation 7429 information for the trampolines. */ 7430 Elf_Internal_Shdr *rel_hdr; 7431 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count) 7432 * sizeof (*new_relocs)); 7433 unsigned ix; 7434 7435 if (!new_relocs) 7436 goto error_return; 7437 memcpy (new_relocs, internal_relocs, 7438 isec->reloc_count * sizeof (*new_relocs)); 7439 for (ix = changes; ix--;) 7440 { 7441 irel = new_relocs + ix + isec->reloc_count; 7442 7443 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 7444 } 7445 if (internal_relocs != elf_section_data (isec)->relocs) 7446 free (internal_relocs); 7447 elf_section_data (isec)->relocs = new_relocs; 7448 isec->reloc_count += changes; 7449 rel_hdr = _bfd_elf_single_rel_hdr (isec); 7450 rel_hdr->sh_size += changes * rel_hdr->sh_entsize; 7451 } 7452 else if (internal_relocs != NULL 7453 && elf_section_data (isec)->relocs != internal_relocs) 7454 free (internal_relocs); 7455 7456 *again = changes != 0 || workaround_change; 7457 return TRUE; 7458 7459 error_return: 7460 while (branch_fixups != NULL) 7461 { 7462 struct one_branch_fixup *f = branch_fixups; 7463 branch_fixups = branch_fixups->next; 7464 free (f); 7465 } 7466 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 7467 free (isymbuf); 7468 if (contents != NULL 7469 && elf_section_data (isec)->this_hdr.contents != contents) 7470 free (contents); 7471 if (internal_relocs != NULL 7472 && elf_section_data (isec)->relocs != internal_relocs) 7473 free (internal_relocs); 7474 return FALSE; 7475 } 7476 7477 /* What to do when ld finds relocations against symbols defined in 7479 discarded sections. */ 7480 7481 static unsigned int 7482 ppc_elf_action_discarded (asection *sec) 7483 { 7484 if (strcmp (".fixup", sec->name) == 0) 7485 return 0; 7486 7487 if (strcmp (".got2", sec->name) == 0) 7488 return 0; 7489 7490 return _bfd_elf_default_action_discarded (sec); 7491 } 7492 7493 /* Fill in the address for a pointer generated in a linker section. */ 7495 7496 static bfd_vma 7497 elf_finish_pointer_linker_section (bfd *input_bfd, 7498 elf_linker_section_t *lsect, 7499 struct elf_link_hash_entry *h, 7500 bfd_vma relocation, 7501 const Elf_Internal_Rela *rel) 7502 { 7503 elf_linker_section_pointers_t *linker_section_ptr; 7504 7505 BFD_ASSERT (lsect != NULL); 7506 7507 if (h != NULL) 7508 { 7509 /* Handle global symbol. */ 7510 struct ppc_elf_link_hash_entry *eh; 7511 7512 eh = (struct ppc_elf_link_hash_entry *) h; 7513 BFD_ASSERT (eh->elf.def_regular); 7514 linker_section_ptr = eh->linker_section_pointer; 7515 } 7516 else 7517 { 7518 /* Handle local symbol. */ 7519 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 7520 7521 BFD_ASSERT (is_ppc_elf (input_bfd)); 7522 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); 7523 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; 7524 } 7525 7526 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, 7527 rel->r_addend, 7528 lsect); 7529 BFD_ASSERT (linker_section_ptr != NULL); 7530 7531 /* Offset will always be a multiple of four, so use the bottom bit 7532 as a "written" flag. */ 7533 if ((linker_section_ptr->offset & 1) == 0) 7534 { 7535 bfd_put_32 (lsect->section->owner, 7536 relocation + linker_section_ptr->addend, 7537 lsect->section->contents + linker_section_ptr->offset); 7538 linker_section_ptr->offset += 1; 7539 } 7540 7541 relocation = (lsect->section->output_section->vma 7542 + lsect->section->output_offset 7543 + linker_section_ptr->offset - 1 7544 - SYM_VAL (lsect->sym)); 7545 7546 #ifdef DEBUG 7547 fprintf (stderr, 7548 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", 7549 lsect->name, (long) relocation, (long) relocation); 7550 #endif 7551 7552 return relocation; 7553 } 7554 7555 #define PPC_LO(v) ((v) & 0xffff) 7556 #define PPC_HI(v) (((v) >> 16) & 0xffff) 7557 #define PPC_HA(v) PPC_HI ((v) + 0x8000) 7558 7559 static void 7560 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p, 7561 struct bfd_link_info *info) 7562 { 7563 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 7564 bfd *output_bfd = info->output_bfd; 7565 bfd_vma plt; 7566 7567 plt = ((ent->plt.offset & ~1) 7568 + plt_sec->output_section->vma 7569 + plt_sec->output_offset); 7570 7571 if (bfd_link_pic (info)) 7572 { 7573 bfd_vma got = 0; 7574 7575 if (ent->addend >= 32768) 7576 got = (ent->addend 7577 + ent->sec->output_section->vma 7578 + ent->sec->output_offset); 7579 else if (htab->elf.hgot != NULL) 7580 got = SYM_VAL (htab->elf.hgot); 7581 7582 plt -= got; 7583 7584 if (plt + 0x8000 < 0x10000) 7585 { 7586 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); 7587 p += 4; 7588 bfd_put_32 (output_bfd, MTCTR_11, p); 7589 p += 4; 7590 bfd_put_32 (output_bfd, BCTR, p); 7591 p += 4; 7592 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p); 7593 p += 4; 7594 } 7595 else 7596 { 7597 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); 7598 p += 4; 7599 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7600 p += 4; 7601 bfd_put_32 (output_bfd, MTCTR_11, p); 7602 p += 4; 7603 bfd_put_32 (output_bfd, BCTR, p); 7604 p += 4; 7605 } 7606 } 7607 else 7608 { 7609 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); 7610 p += 4; 7611 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7612 p += 4; 7613 bfd_put_32 (output_bfd, MTCTR_11, p); 7614 p += 4; 7615 bfd_put_32 (output_bfd, BCTR, p); 7616 p += 4; 7617 } 7618 } 7619 7620 /* Return true if symbol is defined statically. */ 7621 7622 static bfd_boolean 7623 is_static_defined (struct elf_link_hash_entry *h) 7624 { 7625 return ((h->root.type == bfd_link_hash_defined 7626 || h->root.type == bfd_link_hash_defweak) 7627 && h->root.u.def.section != NULL 7628 && h->root.u.def.section->output_section != NULL); 7629 } 7630 7631 /* If INSN is an opcode that may be used with an @tls operand, return 7632 the transformed insn for TLS optimisation, otherwise return 0. If 7633 REG is non-zero only match an insn with RB or RA equal to REG. */ 7634 7635 unsigned int 7636 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg) 7637 { 7638 unsigned int rtra; 7639 7640 if ((insn & (0x3f << 26)) != 31 << 26) 7641 return 0; 7642 7643 if (reg == 0 || ((insn >> 11) & 0x1f) == reg) 7644 rtra = insn & ((1 << 26) - (1 << 16)); 7645 else if (((insn >> 16) & 0x1f) == reg) 7646 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); 7647 else 7648 return 0; 7649 7650 if ((insn & (0x3ff << 1)) == 266 << 1) 7651 /* add -> addi. */ 7652 insn = 14 << 26; 7653 else if ((insn & (0x1f << 1)) == 23 << 1 7654 && ((insn & (0x1f << 6)) < 14 << 6 7655 || ((insn & (0x1f << 6)) >= 16 << 6 7656 && (insn & (0x1f << 6)) < 24 << 6))) 7657 /* load and store indexed -> dform. */ 7658 insn = (32 | ((insn >> 6) & 0x1f)) << 26; 7659 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) 7660 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ 7661 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); 7662 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) 7663 /* lwax -> lwa. */ 7664 insn = (58 << 26) | 2; 7665 else 7666 return 0; 7667 insn |= rtra; 7668 return insn; 7669 } 7670 7671 /* If INSN is an opcode that may be used with an @tprel operand, return 7672 the transformed insn for an undefined weak symbol, ie. with the 7673 thread pointer REG operand removed. Otherwise return 0. */ 7674 7675 unsigned int 7676 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) 7677 { 7678 if ((insn & (0x1f << 16)) == reg << 16 7679 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 7680 || (insn & (0x3f << 26)) == 15u << 26 /* addis */ 7681 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 7682 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 7683 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 7684 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 7685 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 7686 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 7687 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 7688 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 7689 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 7690 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 7691 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 7692 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 7693 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 7694 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 7695 && (insn & 3) != 1) 7696 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 7697 && ((insn & 3) == 0 || (insn & 3) == 3)))) 7698 { 7699 insn &= ~(0x1f << 16); 7700 } 7701 else if ((insn & (0x1f << 21)) == reg << 21 7702 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */ 7703 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */ 7704 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */)) 7705 { 7706 insn &= ~(0x1f << 21); 7707 insn |= (insn & (0x1f << 16)) << 5; 7708 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */) 7709 insn -= 2 >> 26; /* convert to ori,oris */ 7710 } 7711 else 7712 insn = 0; 7713 return insn; 7714 } 7715 7716 static bfd_boolean 7717 is_insn_ds_form (unsigned int insn) 7718 { 7719 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ 7720 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ 7721 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ 7722 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */); 7723 } 7724 7725 static bfd_boolean 7726 is_insn_dq_form (unsigned int insn) 7727 { 7728 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */ 7729 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */ 7730 && (insn & 3) == 1)); 7731 } 7732 7733 /* The RELOCATE_SECTION function is called by the ELF backend linker 7734 to handle the relocations for a section. 7735 7736 The relocs are always passed as Rela structures; if the section 7737 actually uses Rel structures, the r_addend field will always be 7738 zero. 7739 7740 This function is responsible for adjust the section contents as 7741 necessary, and (if using Rela relocs and generating a 7742 relocatable output file) adjusting the reloc addend as 7743 necessary. 7744 7745 This function does not have to worry about setting the reloc 7746 address or the reloc symbol index. 7747 7748 LOCAL_SYMS is a pointer to the swapped in local symbols. 7749 7750 LOCAL_SECTIONS is an array giving the section in the input file 7751 corresponding to the st_shndx field of each local symbol. 7752 7753 The global hash table entry for the global symbols can be found 7754 via elf_sym_hashes (input_bfd). 7755 7756 When generating relocatable output, this function must handle 7757 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 7758 going to be the section symbol corresponding to the output 7759 section, which means that the addend must be adjusted 7760 accordingly. */ 7761 7762 static bfd_boolean 7763 ppc_elf_relocate_section (bfd *output_bfd, 7764 struct bfd_link_info *info, 7765 bfd *input_bfd, 7766 asection *input_section, 7767 bfd_byte *contents, 7768 Elf_Internal_Rela *relocs, 7769 Elf_Internal_Sym *local_syms, 7770 asection **local_sections) 7771 { 7772 Elf_Internal_Shdr *symtab_hdr; 7773 struct elf_link_hash_entry **sym_hashes; 7774 struct ppc_elf_link_hash_table *htab; 7775 Elf_Internal_Rela *rel; 7776 Elf_Internal_Rela *wrel; 7777 Elf_Internal_Rela *relend; 7778 Elf_Internal_Rela outrel; 7779 asection *got2; 7780 bfd_vma *local_got_offsets; 7781 bfd_boolean ret = TRUE; 7782 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); 7783 bfd_boolean is_vxworks_tls; 7784 unsigned int picfixup_size = 0; 7785 struct ppc_elf_relax_info *relax_info = NULL; 7786 7787 #ifdef DEBUG 7788 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " 7789 "%ld relocations%s", 7790 input_bfd, input_section, 7791 (long) input_section->reloc_count, 7792 (bfd_link_relocatable (info)) ? " (relocatable)" : ""); 7793 #endif 7794 7795 got2 = bfd_get_section_by_name (input_bfd, ".got2"); 7796 7797 /* Initialize howto table if not already done. */ 7798 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 7799 ppc_elf_howto_init (); 7800 7801 htab = ppc_elf_hash_table (info); 7802 local_got_offsets = elf_local_got_offsets (input_bfd); 7803 symtab_hdr = &elf_symtab_hdr (input_bfd); 7804 sym_hashes = elf_sym_hashes (input_bfd); 7805 /* We have to handle relocations in vxworks .tls_vars sections 7806 specially, because the dynamic loader is 'weird'. */ 7807 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info) 7808 && !strcmp (input_section->output_section->name, 7809 ".tls_vars")); 7810 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET) 7811 relax_info = elf_section_data (input_section)->sec_info; 7812 rel = wrel = relocs; 7813 relend = relocs + input_section->reloc_count; 7814 for (; rel < relend; wrel++, rel++) 7815 { 7816 enum elf_ppc_reloc_type r_type; 7817 bfd_vma addend; 7818 bfd_reloc_status_type r; 7819 Elf_Internal_Sym *sym; 7820 asection *sec; 7821 struct elf_link_hash_entry *h; 7822 const char *sym_name; 7823 reloc_howto_type *howto; 7824 unsigned long r_symndx; 7825 bfd_vma relocation; 7826 bfd_vma branch_bit, from; 7827 bfd_boolean unresolved_reloc; 7828 bfd_boolean warned; 7829 unsigned int tls_type, tls_mask, tls_gd; 7830 struct plt_entry **ifunc; 7831 struct reloc_howto_struct alt_howto; 7832 7833 again: 7834 r_type = ELF32_R_TYPE (rel->r_info); 7835 sym = NULL; 7836 sec = NULL; 7837 h = NULL; 7838 unresolved_reloc = FALSE; 7839 warned = FALSE; 7840 r_symndx = ELF32_R_SYM (rel->r_info); 7841 7842 if (r_symndx < symtab_hdr->sh_info) 7843 { 7844 sym = local_syms + r_symndx; 7845 sec = local_sections[r_symndx]; 7846 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 7847 7848 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 7849 } 7850 else 7851 { 7852 bfd_boolean ignored; 7853 7854 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 7855 r_symndx, symtab_hdr, sym_hashes, 7856 h, sec, relocation, 7857 unresolved_reloc, warned, ignored); 7858 7859 sym_name = h->root.root.string; 7860 } 7861 7862 if (sec != NULL && discarded_section (sec)) 7863 { 7864 /* For relocs against symbols from removed linkonce sections, 7865 or sections discarded by a linker script, we just want the 7866 section contents zeroed. Avoid any special processing. */ 7867 howto = NULL; 7868 if (r_type < R_PPC_max) 7869 howto = ppc_elf_howto_table[r_type]; 7870 7871 _bfd_clear_contents (howto, input_bfd, input_section, 7872 contents + rel->r_offset); 7873 wrel->r_offset = rel->r_offset; 7874 wrel->r_info = 0; 7875 wrel->r_addend = 0; 7876 7877 /* For ld -r, remove relocations in debug sections against 7878 sections defined in discarded sections. Not done for 7879 non-debug to preserve relocs in .eh_frame which the 7880 eh_frame editing code expects to be present. */ 7881 if (bfd_link_relocatable (info) 7882 && (input_section->flags & SEC_DEBUGGING)) 7883 wrel--; 7884 7885 continue; 7886 } 7887 7888 if (bfd_link_relocatable (info)) 7889 { 7890 if (got2 != NULL 7891 && r_type == R_PPC_PLTREL24 7892 && rel->r_addend != 0) 7893 { 7894 /* R_PPC_PLTREL24 is rather special. If non-zero, the 7895 addend specifies the GOT pointer offset within .got2. */ 7896 rel->r_addend += got2->output_offset; 7897 } 7898 if (r_type != R_PPC_RELAX_PLT 7899 && r_type != R_PPC_RELAX_PLTREL24 7900 && r_type != R_PPC_RELAX) 7901 goto copy_reloc; 7902 } 7903 7904 /* TLS optimizations. Replace instruction sequences and relocs 7905 based on information we collected in tls_optimize. We edit 7906 RELOCS so that --emit-relocs will output something sensible 7907 for the final instruction stream. */ 7908 tls_mask = 0; 7909 tls_gd = 0; 7910 if (h != NULL) 7911 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; 7912 else if (local_got_offsets != NULL) 7913 { 7914 struct plt_entry **local_plt; 7915 char *lgot_masks; 7916 local_plt 7917 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info); 7918 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 7919 tls_mask = lgot_masks[r_symndx]; 7920 } 7921 7922 /* Ensure reloc mapping code below stays sane. */ 7923 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) 7924 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) 7925 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) 7926 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) 7927 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) 7928 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) 7929 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) 7930 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) 7931 abort (); 7932 switch (r_type) 7933 { 7934 default: 7935 break; 7936 7937 case R_PPC_GOT_TPREL16: 7938 case R_PPC_GOT_TPREL16_LO: 7939 if ((tls_mask & TLS_TLS) != 0 7940 && (tls_mask & TLS_TPREL) == 0) 7941 { 7942 bfd_vma insn; 7943 7944 insn = bfd_get_32 (output_bfd, 7945 contents + rel->r_offset - d_offset); 7946 insn &= 31 << 21; 7947 insn |= 0x3c020000; /* addis 0,2,0 */ 7948 bfd_put_32 (output_bfd, insn, 7949 contents + rel->r_offset - d_offset); 7950 r_type = R_PPC_TPREL16_HA; 7951 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7952 } 7953 break; 7954 7955 case R_PPC_TLS: 7956 if ((tls_mask & TLS_TLS) != 0 7957 && (tls_mask & TLS_TPREL) == 0) 7958 { 7959 bfd_vma insn; 7960 7961 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 7962 insn = _bfd_elf_ppc_at_tls_transform (insn, 2); 7963 if (insn == 0) 7964 abort (); 7965 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 7966 r_type = R_PPC_TPREL16_LO; 7967 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7968 7969 /* Was PPC_TLS which sits on insn boundary, now 7970 PPC_TPREL16_LO which is at low-order half-word. */ 7971 rel->r_offset += d_offset; 7972 } 7973 break; 7974 7975 case R_PPC_GOT_TLSGD16_HI: 7976 case R_PPC_GOT_TLSGD16_HA: 7977 tls_gd = TLS_TPRELGD; 7978 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 7979 goto tls_gdld_hi; 7980 break; 7981 7982 case R_PPC_GOT_TLSLD16_HI: 7983 case R_PPC_GOT_TLSLD16_HA: 7984 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 7985 { 7986 tls_gdld_hi: 7987 if ((tls_mask & tls_gd) != 0) 7988 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 7989 + R_PPC_GOT_TPREL16); 7990 else 7991 { 7992 rel->r_offset -= d_offset; 7993 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 7994 r_type = R_PPC_NONE; 7995 } 7996 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7997 } 7998 break; 7999 8000 case R_PPC_GOT_TLSGD16: 8001 case R_PPC_GOT_TLSGD16_LO: 8002 tls_gd = TLS_TPRELGD; 8003 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 8004 goto tls_ldgd_opt; 8005 break; 8006 8007 case R_PPC_GOT_TLSLD16: 8008 case R_PPC_GOT_TLSLD16_LO: 8009 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 8010 { 8011 unsigned int insn1, insn2; 8012 bfd_vma offset; 8013 8014 tls_ldgd_opt: 8015 offset = (bfd_vma) -1; 8016 /* If not using the newer R_PPC_TLSGD/LD to mark 8017 __tls_get_addr calls, we must trust that the call 8018 stays with its arg setup insns, ie. that the next 8019 reloc is the __tls_get_addr call associated with 8020 the current reloc. Edit both insns. */ 8021 if (input_section->has_tls_get_addr_call 8022 && rel + 1 < relend 8023 && branch_reloc_hash_match (input_bfd, rel + 1, 8024 htab->tls_get_addr)) 8025 offset = rel[1].r_offset; 8026 /* We read the low GOT_TLS insn because we need to keep 8027 the destination reg. It may be something other than 8028 the usual r3, and moved to r3 before the call by 8029 intervening code. */ 8030 insn1 = bfd_get_32 (output_bfd, 8031 contents + rel->r_offset - d_offset); 8032 if ((tls_mask & tls_gd) != 0) 8033 { 8034 /* IE */ 8035 insn1 &= (0x1f << 21) | (0x1f << 16); 8036 insn1 |= 32 << 26; /* lwz */ 8037 if (offset != (bfd_vma) -1) 8038 { 8039 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8040 insn2 = 0x7c631214; /* add 3,3,2 */ 8041 bfd_put_32 (output_bfd, insn2, contents + offset); 8042 } 8043 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 8044 + R_PPC_GOT_TPREL16); 8045 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8046 } 8047 else 8048 { 8049 /* LE */ 8050 insn1 &= 0x1f << 21; 8051 insn1 |= 0x3c020000; /* addis r,2,0 */ 8052 if (tls_gd == 0) 8053 { 8054 /* Was an LD reloc. */ 8055 for (r_symndx = 0; 8056 r_symndx < symtab_hdr->sh_info; 8057 r_symndx++) 8058 if (local_sections[r_symndx] == sec) 8059 break; 8060 if (r_symndx >= symtab_hdr->sh_info) 8061 r_symndx = STN_UNDEF; 8062 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 8063 if (r_symndx != STN_UNDEF) 8064 rel->r_addend -= (local_syms[r_symndx].st_value 8065 + sec->output_offset 8066 + sec->output_section->vma); 8067 } 8068 r_type = R_PPC_TPREL16_HA; 8069 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8070 if (offset != (bfd_vma) -1) 8071 { 8072 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 8073 rel[1].r_offset = offset + d_offset; 8074 rel[1].r_addend = rel->r_addend; 8075 insn2 = 0x38630000; /* addi 3,3,0 */ 8076 bfd_put_32 (output_bfd, insn2, contents + offset); 8077 } 8078 } 8079 bfd_put_32 (output_bfd, insn1, 8080 contents + rel->r_offset - d_offset); 8081 if (tls_gd == 0) 8082 { 8083 /* We changed the symbol on an LD reloc. Start over 8084 in order to get h, sym, sec etc. right. */ 8085 goto again; 8086 } 8087 } 8088 break; 8089 8090 case R_PPC_TLSGD: 8091 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 8092 { 8093 unsigned int insn2; 8094 bfd_vma offset = rel->r_offset; 8095 8096 if ((tls_mask & TLS_TPRELGD) != 0) 8097 { 8098 /* IE */ 8099 r_type = R_PPC_NONE; 8100 insn2 = 0x7c631214; /* add 3,3,2 */ 8101 } 8102 else 8103 { 8104 /* LE */ 8105 r_type = R_PPC_TPREL16_LO; 8106 rel->r_offset += d_offset; 8107 insn2 = 0x38630000; /* addi 3,3,0 */ 8108 } 8109 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 8110 bfd_put_32 (output_bfd, insn2, contents + offset); 8111 /* Zap the reloc on the _tls_get_addr call too. */ 8112 BFD_ASSERT (offset == rel[1].r_offset); 8113 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8114 } 8115 break; 8116 8117 case R_PPC_TLSLD: 8118 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 8119 { 8120 unsigned int insn2; 8121 8122 for (r_symndx = 0; 8123 r_symndx < symtab_hdr->sh_info; 8124 r_symndx++) 8125 if (local_sections[r_symndx] == sec) 8126 break; 8127 if (r_symndx >= symtab_hdr->sh_info) 8128 r_symndx = STN_UNDEF; 8129 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 8130 if (r_symndx != STN_UNDEF) 8131 rel->r_addend -= (local_syms[r_symndx].st_value 8132 + sec->output_offset 8133 + sec->output_section->vma); 8134 8135 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 8136 rel->r_offset += d_offset; 8137 insn2 = 0x38630000; /* addi 3,3,0 */ 8138 bfd_put_32 (output_bfd, insn2, 8139 contents + rel->r_offset - d_offset); 8140 /* Zap the reloc on the _tls_get_addr call too. */ 8141 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset); 8142 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 8143 goto again; 8144 } 8145 break; 8146 } 8147 8148 /* Handle other relocations that tweak non-addend part of insn. */ 8149 branch_bit = 0; 8150 switch (r_type) 8151 { 8152 default: 8153 break; 8154 8155 /* Branch taken prediction relocations. */ 8156 case R_PPC_ADDR14_BRTAKEN: 8157 case R_PPC_REL14_BRTAKEN: 8158 branch_bit = BRANCH_PREDICT_BIT; 8159 /* Fall thru */ 8160 8161 /* Branch not taken prediction relocations. */ 8162 case R_PPC_ADDR14_BRNTAKEN: 8163 case R_PPC_REL14_BRNTAKEN: 8164 { 8165 bfd_vma insn; 8166 8167 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 8168 insn &= ~BRANCH_PREDICT_BIT; 8169 insn |= branch_bit; 8170 8171 from = (rel->r_offset 8172 + input_section->output_offset 8173 + input_section->output_section->vma); 8174 8175 /* Invert 'y' bit if not the default. */ 8176 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) 8177 insn ^= BRANCH_PREDICT_BIT; 8178 8179 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 8180 break; 8181 } 8182 } 8183 8184 if (ELIMINATE_COPY_RELOCS 8185 && h != NULL 8186 && !h->def_regular 8187 && h->protected_def 8188 && ppc_elf_hash_entry (h)->has_addr16_ha 8189 && ppc_elf_hash_entry (h)->has_addr16_lo 8190 && htab->params->pic_fixup > 0) 8191 { 8192 /* Convert lis;addi or lis;load/store accessing a protected 8193 variable defined in a shared library to PIC. */ 8194 unsigned int insn; 8195 8196 if (r_type == R_PPC_ADDR16_HA) 8197 { 8198 insn = bfd_get_32 (output_bfd, 8199 contents + rel->r_offset - d_offset); 8200 if ((insn & (0x3f << 26)) == (15u << 26) 8201 && (insn & (0x1f << 16)) == 0 /* lis */) 8202 { 8203 bfd_byte *p; 8204 bfd_vma off; 8205 bfd_vma got_addr; 8206 8207 p = (contents + input_section->size 8208 - relax_info->workaround_size 8209 - relax_info->picfixup_size 8210 + picfixup_size); 8211 off = (p - contents) - (rel->r_offset - d_offset); 8212 if (off > 0x1fffffc || (off & 3) != 0) 8213 info->callbacks->einfo 8214 (_("%P: %H: fixup branch overflow\n"), 8215 input_bfd, input_section, rel->r_offset); 8216 8217 bfd_put_32 (output_bfd, B | off, 8218 contents + rel->r_offset - d_offset); 8219 got_addr = (htab->got->output_section->vma 8220 + htab->got->output_offset 8221 + (h->got.offset & ~1)); 8222 wrel->r_offset = (p - contents) + d_offset; 8223 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA); 8224 wrel->r_addend = got_addr; 8225 insn &= ~0xffff; 8226 insn |= ((unsigned int )(got_addr + 0x8000) >> 16) & 0xffff; 8227 bfd_put_32 (output_bfd, insn, p); 8228 8229 /* Convert lis to lwz, loading address from GOT. */ 8230 insn &= ~0xffff; 8231 insn ^= (32u ^ 15u) << 26; 8232 insn |= (insn & (0x1f << 21)) >> 5; 8233 insn |= got_addr & 0xffff; 8234 bfd_put_32 (output_bfd, insn, p + 4); 8235 8236 bfd_put_32 (output_bfd, B | ((-4 - off) & 0x3ffffff), p + 8); 8237 picfixup_size += 12; 8238 8239 /* Use one of the spare relocs, so --emit-relocs 8240 output is reasonable. */ 8241 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel)); 8242 wrel++, rel++; 8243 rel->r_offset = wrel[-1].r_offset + 4; 8244 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO); 8245 rel->r_addend = wrel[-1].r_addend; 8246 8247 /* Continue on as if we had a got reloc, to output 8248 dynamic reloc. */ 8249 r_type = R_PPC_GOT16_LO; 8250 } 8251 else 8252 info->callbacks->einfo 8253 (_("%P: %H: error: %s with unexpected instruction %x\n"), 8254 input_bfd, input_section, rel->r_offset, 8255 "R_PPC_ADDR16_HA", insn); 8256 } 8257 else if (r_type == R_PPC_ADDR16_LO) 8258 { 8259 insn = bfd_get_32 (output_bfd, 8260 contents + rel->r_offset - d_offset); 8261 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 8262 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 8263 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 8264 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 8265 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 8266 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 8267 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 8268 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 8269 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 8270 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 8271 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 8272 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 8273 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 8274 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 8275 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 8276 && (insn & 3) != 1) 8277 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 8278 && ((insn & 3) == 0 || (insn & 3) == 3))) 8279 { 8280 /* Arrange to apply the reloc addend, if any. */ 8281 relocation = 0; 8282 unresolved_reloc = FALSE; 8283 rel->r_info = ELF32_R_INFO (0, r_type); 8284 } 8285 else 8286 info->callbacks->einfo 8287 (_("%P: %H: error: %s with unexpected instruction %x\n"), 8288 input_bfd, input_section, rel->r_offset, 8289 "R_PPC_ADDR16_LO", insn); 8290 } 8291 } 8292 8293 ifunc = NULL; 8294 if (!htab->is_vxworks) 8295 { 8296 struct plt_entry *ent; 8297 8298 if (h != NULL) 8299 { 8300 if (h->type == STT_GNU_IFUNC) 8301 ifunc = &h->plt.plist; 8302 } 8303 else if (local_got_offsets != NULL 8304 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 8305 { 8306 struct plt_entry **local_plt; 8307 8308 local_plt = (struct plt_entry **) (local_got_offsets 8309 + symtab_hdr->sh_info); 8310 ifunc = local_plt + r_symndx; 8311 } 8312 8313 ent = NULL; 8314 if (ifunc != NULL 8315 && (!bfd_link_pic (info) 8316 || is_branch_reloc (r_type))) 8317 { 8318 addend = 0; 8319 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info)) 8320 addend = rel->r_addend; 8321 ent = find_plt_ent (ifunc, got2, addend); 8322 } 8323 if (ent != NULL) 8324 { 8325 if (h == NULL && (ent->plt.offset & 1) == 0) 8326 { 8327 Elf_Internal_Rela rela; 8328 bfd_byte *loc; 8329 8330 rela.r_offset = (htab->iplt->output_section->vma 8331 + htab->iplt->output_offset 8332 + ent->plt.offset); 8333 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8334 rela.r_addend = relocation; 8335 loc = htab->reliplt->contents; 8336 loc += (htab->reliplt->reloc_count++ 8337 * sizeof (Elf32_External_Rela)); 8338 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 8339 8340 ent->plt.offset |= 1; 8341 } 8342 if (h == NULL && (ent->glink_offset & 1) == 0) 8343 { 8344 unsigned char *p = ((unsigned char *) htab->glink->contents 8345 + ent->glink_offset); 8346 write_glink_stub (ent, htab->iplt, p, info); 8347 ent->glink_offset |= 1; 8348 } 8349 8350 unresolved_reloc = FALSE; 8351 if (htab->plt_type == PLT_NEW 8352 || !htab->elf.dynamic_sections_created 8353 || h == NULL 8354 || h->dynindx == -1) 8355 relocation = (htab->glink->output_section->vma 8356 + htab->glink->output_offset 8357 + (ent->glink_offset & ~1)); 8358 else 8359 relocation = (htab->plt->output_section->vma 8360 + htab->plt->output_offset 8361 + ent->plt.offset); 8362 } 8363 } 8364 8365 addend = rel->r_addend; 8366 tls_type = 0; 8367 howto = NULL; 8368 if (r_type < R_PPC_max) 8369 howto = ppc_elf_howto_table[r_type]; 8370 switch (r_type) 8371 { 8372 default: 8373 info->callbacks->einfo 8374 (_("%P: %B: unknown relocation type %d for symbol %s\n"), 8375 input_bfd, (int) r_type, sym_name); 8376 8377 bfd_set_error (bfd_error_bad_value); 8378 ret = FALSE; 8379 goto copy_reloc; 8380 8381 case R_PPC_NONE: 8382 case R_PPC_TLS: 8383 case R_PPC_TLSGD: 8384 case R_PPC_TLSLD: 8385 case R_PPC_EMB_MRKREF: 8386 case R_PPC_GNU_VTINHERIT: 8387 case R_PPC_GNU_VTENTRY: 8388 goto copy_reloc; 8389 8390 /* GOT16 relocations. Like an ADDR16 using the symbol's 8391 address in the GOT as relocation value instead of the 8392 symbol's value itself. Also, create a GOT entry for the 8393 symbol and put the symbol value there. */ 8394 case R_PPC_GOT_TLSGD16: 8395 case R_PPC_GOT_TLSGD16_LO: 8396 case R_PPC_GOT_TLSGD16_HI: 8397 case R_PPC_GOT_TLSGD16_HA: 8398 tls_type = TLS_TLS | TLS_GD; 8399 goto dogot; 8400 8401 case R_PPC_GOT_TLSLD16: 8402 case R_PPC_GOT_TLSLD16_LO: 8403 case R_PPC_GOT_TLSLD16_HI: 8404 case R_PPC_GOT_TLSLD16_HA: 8405 tls_type = TLS_TLS | TLS_LD; 8406 goto dogot; 8407 8408 case R_PPC_GOT_TPREL16: 8409 case R_PPC_GOT_TPREL16_LO: 8410 case R_PPC_GOT_TPREL16_HI: 8411 case R_PPC_GOT_TPREL16_HA: 8412 tls_type = TLS_TLS | TLS_TPREL; 8413 goto dogot; 8414 8415 case R_PPC_GOT_DTPREL16: 8416 case R_PPC_GOT_DTPREL16_LO: 8417 case R_PPC_GOT_DTPREL16_HI: 8418 case R_PPC_GOT_DTPREL16_HA: 8419 tls_type = TLS_TLS | TLS_DTPREL; 8420 goto dogot; 8421 8422 case R_PPC_GOT16: 8423 case R_PPC_GOT16_LO: 8424 case R_PPC_GOT16_HI: 8425 case R_PPC_GOT16_HA: 8426 tls_mask = 0; 8427 dogot: 8428 { 8429 /* Relocation is to the entry for this symbol in the global 8430 offset table. */ 8431 bfd_vma off; 8432 bfd_vma *offp; 8433 unsigned long indx; 8434 8435 if (htab->got == NULL) 8436 abort (); 8437 8438 indx = 0; 8439 if (tls_type == (TLS_TLS | TLS_LD) 8440 && (h == NULL 8441 || !h->def_dynamic)) 8442 offp = &htab->tlsld_got.offset; 8443 else if (h != NULL) 8444 { 8445 bfd_boolean dyn; 8446 dyn = htab->elf.dynamic_sections_created; 8447 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) 8448 || (bfd_link_pic (info) 8449 && SYMBOL_REFERENCES_LOCAL (info, h))) 8450 /* This is actually a static link, or it is a 8451 -Bsymbolic link and the symbol is defined 8452 locally, or the symbol was forced to be local 8453 because of a version file. */ 8454 ; 8455 else 8456 { 8457 BFD_ASSERT (h->dynindx != -1); 8458 indx = h->dynindx; 8459 unresolved_reloc = FALSE; 8460 } 8461 offp = &h->got.offset; 8462 } 8463 else 8464 { 8465 if (local_got_offsets == NULL) 8466 abort (); 8467 offp = &local_got_offsets[r_symndx]; 8468 } 8469 8470 /* The offset must always be a multiple of 4. We use the 8471 least significant bit to record whether we have already 8472 processed this entry. */ 8473 off = *offp; 8474 if ((off & 1) != 0) 8475 off &= ~1; 8476 else 8477 { 8478 unsigned int tls_m = (tls_mask 8479 & (TLS_LD | TLS_GD | TLS_DTPREL 8480 | TLS_TPREL | TLS_TPRELGD)); 8481 8482 if (offp == &htab->tlsld_got.offset) 8483 tls_m = TLS_LD; 8484 else if (h == NULL 8485 || !h->def_dynamic) 8486 tls_m &= ~TLS_LD; 8487 8488 /* We might have multiple got entries for this sym. 8489 Initialize them all. */ 8490 do 8491 { 8492 int tls_ty = 0; 8493 8494 if ((tls_m & TLS_LD) != 0) 8495 { 8496 tls_ty = TLS_TLS | TLS_LD; 8497 tls_m &= ~TLS_LD; 8498 } 8499 else if ((tls_m & TLS_GD) != 0) 8500 { 8501 tls_ty = TLS_TLS | TLS_GD; 8502 tls_m &= ~TLS_GD; 8503 } 8504 else if ((tls_m & TLS_DTPREL) != 0) 8505 { 8506 tls_ty = TLS_TLS | TLS_DTPREL; 8507 tls_m &= ~TLS_DTPREL; 8508 } 8509 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) 8510 { 8511 tls_ty = TLS_TLS | TLS_TPREL; 8512 tls_m = 0; 8513 } 8514 8515 /* Generate relocs for the dynamic linker. */ 8516 if ((bfd_link_pic (info) || indx != 0) 8517 && (offp == &htab->tlsld_got.offset 8518 || h == NULL 8519 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 8520 || h->root.type != bfd_link_hash_undefweak)) 8521 { 8522 asection *rsec = htab->relgot; 8523 bfd_byte * loc; 8524 8525 if (ifunc != NULL) 8526 rsec = htab->reliplt; 8527 outrel.r_offset = (htab->got->output_section->vma 8528 + htab->got->output_offset 8529 + off); 8530 outrel.r_addend = 0; 8531 if (tls_ty & (TLS_LD | TLS_GD)) 8532 { 8533 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); 8534 if (tls_ty == (TLS_TLS | TLS_GD)) 8535 { 8536 loc = rsec->contents; 8537 loc += (rsec->reloc_count++ 8538 * sizeof (Elf32_External_Rela)); 8539 bfd_elf32_swap_reloca_out (output_bfd, 8540 &outrel, loc); 8541 outrel.r_offset += 4; 8542 outrel.r_info 8543 = ELF32_R_INFO (indx, R_PPC_DTPREL32); 8544 } 8545 } 8546 else if (tls_ty == (TLS_TLS | TLS_DTPREL)) 8547 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); 8548 else if (tls_ty == (TLS_TLS | TLS_TPREL)) 8549 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); 8550 else if (indx != 0) 8551 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); 8552 else if (ifunc != NULL) 8553 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8554 else 8555 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8556 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD)) 8557 { 8558 outrel.r_addend += relocation; 8559 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 8560 { 8561 if (htab->elf.tls_sec == NULL) 8562 outrel.r_addend = 0; 8563 else 8564 outrel.r_addend -= htab->elf.tls_sec->vma; 8565 } 8566 } 8567 loc = rsec->contents; 8568 loc += (rsec->reloc_count++ 8569 * sizeof (Elf32_External_Rela)); 8570 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 8571 } 8572 8573 /* Init the .got section contents if we're not 8574 emitting a reloc. */ 8575 else 8576 { 8577 bfd_vma value = relocation; 8578 8579 if (tls_ty == (TLS_TLS | TLS_LD)) 8580 value = 1; 8581 else if (tls_ty != 0) 8582 { 8583 if (htab->elf.tls_sec == NULL) 8584 value = 0; 8585 else 8586 { 8587 value -= htab->elf.tls_sec->vma + DTP_OFFSET; 8588 if (tls_ty == (TLS_TLS | TLS_TPREL)) 8589 value += DTP_OFFSET - TP_OFFSET; 8590 } 8591 8592 if (tls_ty == (TLS_TLS | TLS_GD)) 8593 { 8594 bfd_put_32 (output_bfd, value, 8595 htab->got->contents + off + 4); 8596 value = 1; 8597 } 8598 } 8599 bfd_put_32 (output_bfd, value, 8600 htab->got->contents + off); 8601 } 8602 8603 off += 4; 8604 if (tls_ty & (TLS_LD | TLS_GD)) 8605 off += 4; 8606 } 8607 while (tls_m != 0); 8608 8609 off = *offp; 8610 *offp = off | 1; 8611 } 8612 8613 if (off >= (bfd_vma) -2) 8614 abort (); 8615 8616 if ((tls_type & TLS_TLS) != 0) 8617 { 8618 if (tls_type != (TLS_TLS | TLS_LD)) 8619 { 8620 if ((tls_mask & TLS_LD) != 0 8621 && !(h == NULL 8622 || !h->def_dynamic)) 8623 off += 8; 8624 if (tls_type != (TLS_TLS | TLS_GD)) 8625 { 8626 if ((tls_mask & TLS_GD) != 0) 8627 off += 8; 8628 if (tls_type != (TLS_TLS | TLS_DTPREL)) 8629 { 8630 if ((tls_mask & TLS_DTPREL) != 0) 8631 off += 4; 8632 } 8633 } 8634 } 8635 } 8636 8637 /* If here for a picfixup, we're done. */ 8638 if (r_type != ELF32_R_TYPE (rel->r_info)) 8639 goto copy_reloc; 8640 8641 relocation = (htab->got->output_section->vma 8642 + htab->got->output_offset 8643 + off 8644 - SYM_VAL (htab->elf.hgot)); 8645 8646 /* Addends on got relocations don't make much sense. 8647 x+off@got is actually x@got+off, and since the got is 8648 generated by a hash table traversal, the value in the 8649 got at entry m+n bears little relation to the entry m. */ 8650 if (addend != 0) 8651 info->callbacks->einfo 8652 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"), 8653 input_bfd, input_section, rel->r_offset, 8654 howto->name, 8655 sym_name); 8656 } 8657 break; 8658 8659 /* Relocations that need no special processing. */ 8660 case R_PPC_LOCAL24PC: 8661 /* It makes no sense to point a local relocation 8662 at a symbol not in this object. */ 8663 if (unresolved_reloc) 8664 { 8665 (*info->callbacks->undefined_symbol) (info, 8666 h->root.root.string, 8667 input_bfd, 8668 input_section, 8669 rel->r_offset, 8670 TRUE); 8671 goto copy_reloc; 8672 } 8673 break; 8674 8675 case R_PPC_DTPREL16: 8676 case R_PPC_DTPREL16_LO: 8677 case R_PPC_DTPREL16_HI: 8678 case R_PPC_DTPREL16_HA: 8679 if (htab->elf.tls_sec != NULL) 8680 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8681 break; 8682 8683 /* Relocations that may need to be propagated if this is a shared 8684 object. */ 8685 case R_PPC_TPREL16: 8686 case R_PPC_TPREL16_LO: 8687 case R_PPC_TPREL16_HI: 8688 case R_PPC_TPREL16_HA: 8689 if (h != NULL 8690 && h->root.type == bfd_link_hash_undefweak 8691 && h->dynindx == -1) 8692 { 8693 /* Make this relocation against an undefined weak symbol 8694 resolve to zero. This is really just a tweak, since 8695 code using weak externs ought to check that they are 8696 defined before using them. */ 8697 bfd_byte *p = contents + rel->r_offset - d_offset; 8698 unsigned int insn = bfd_get_32 (output_bfd, p); 8699 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2); 8700 if (insn != 0) 8701 bfd_put_32 (output_bfd, insn, p); 8702 break; 8703 } 8704 if (htab->elf.tls_sec != NULL) 8705 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8706 /* The TPREL16 relocs shouldn't really be used in shared 8707 libs as they will result in DT_TEXTREL being set, but 8708 support them anyway. */ 8709 goto dodyn; 8710 8711 case R_PPC_TPREL32: 8712 if (htab->elf.tls_sec != NULL) 8713 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8714 goto dodyn; 8715 8716 case R_PPC_DTPREL32: 8717 if (htab->elf.tls_sec != NULL) 8718 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8719 goto dodyn; 8720 8721 case R_PPC_DTPMOD32: 8722 relocation = 1; 8723 addend = 0; 8724 goto dodyn; 8725 8726 case R_PPC_REL16: 8727 case R_PPC_REL16_LO: 8728 case R_PPC_REL16_HI: 8729 case R_PPC_REL16_HA: 8730 case R_PPC_REL16DX_HA: 8731 break; 8732 8733 case R_PPC_REL32: 8734 if (h == NULL || h == htab->elf.hgot) 8735 break; 8736 /* fall through */ 8737 8738 case R_PPC_ADDR32: 8739 case R_PPC_ADDR16: 8740 case R_PPC_ADDR16_LO: 8741 case R_PPC_ADDR16_HI: 8742 case R_PPC_ADDR16_HA: 8743 case R_PPC_UADDR32: 8744 case R_PPC_UADDR16: 8745 goto dodyn; 8746 8747 case R_PPC_VLE_REL8: 8748 case R_PPC_VLE_REL15: 8749 case R_PPC_VLE_REL24: 8750 case R_PPC_REL24: 8751 case R_PPC_REL14: 8752 case R_PPC_REL14_BRTAKEN: 8753 case R_PPC_REL14_BRNTAKEN: 8754 /* If these relocations are not to a named symbol, they can be 8755 handled right here, no need to bother the dynamic linker. */ 8756 if (SYMBOL_CALLS_LOCAL (info, h) 8757 || h == htab->elf.hgot) 8758 break; 8759 /* fall through */ 8760 8761 case R_PPC_ADDR24: 8762 case R_PPC_ADDR14: 8763 case R_PPC_ADDR14_BRTAKEN: 8764 case R_PPC_ADDR14_BRNTAKEN: 8765 if (h != NULL && !bfd_link_pic (info)) 8766 break; 8767 /* fall through */ 8768 8769 dodyn: 8770 if ((input_section->flags & SEC_ALLOC) == 0 8771 || is_vxworks_tls) 8772 break; 8773 8774 if ((bfd_link_pic (info) 8775 && !(h != NULL 8776 && ((h->root.type == bfd_link_hash_undefined 8777 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 8778 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 8779 || (h->root.type == bfd_link_hash_undefweak 8780 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))) 8781 && (must_be_dyn_reloc (info, r_type) 8782 || !SYMBOL_CALLS_LOCAL (info, h))) 8783 || (ELIMINATE_COPY_RELOCS 8784 && !bfd_link_pic (info) 8785 && h != NULL 8786 && h->dynindx != -1 8787 && !h->non_got_ref 8788 && !h->def_regular 8789 && !(h->protected_def 8790 && ppc_elf_hash_entry (h)->has_addr16_ha 8791 && ppc_elf_hash_entry (h)->has_addr16_lo 8792 && htab->params->pic_fixup > 0))) 8793 { 8794 int skip; 8795 bfd_byte *loc; 8796 asection *sreloc; 8797 #ifdef DEBUG 8798 fprintf (stderr, "ppc_elf_relocate_section needs to " 8799 "create relocation for %s\n", 8800 (h && h->root.root.string 8801 ? h->root.root.string : "<unknown>")); 8802 #endif 8803 8804 /* When generating a shared object, these relocations 8805 are copied into the output file to be resolved at run 8806 time. */ 8807 sreloc = elf_section_data (input_section)->sreloc; 8808 if (ifunc) 8809 sreloc = htab->reliplt; 8810 if (sreloc == NULL) 8811 return FALSE; 8812 8813 skip = 0; 8814 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, 8815 input_section, 8816 rel->r_offset); 8817 if (outrel.r_offset == (bfd_vma) -1 8818 || outrel.r_offset == (bfd_vma) -2) 8819 skip = (int) outrel.r_offset; 8820 outrel.r_offset += (input_section->output_section->vma 8821 + input_section->output_offset); 8822 8823 if (skip) 8824 memset (&outrel, 0, sizeof outrel); 8825 else if ((h != NULL 8826 && (h->root.type == bfd_link_hash_undefined 8827 || h->root.type == bfd_link_hash_undefweak)) 8828 || !SYMBOL_REFERENCES_LOCAL (info, h)) 8829 { 8830 BFD_ASSERT (h->dynindx != -1); 8831 unresolved_reloc = FALSE; 8832 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 8833 outrel.r_addend = rel->r_addend; 8834 } 8835 else 8836 { 8837 outrel.r_addend = relocation + rel->r_addend; 8838 8839 if (r_type != R_PPC_ADDR32) 8840 { 8841 long indx = 0; 8842 8843 if (ifunc != NULL) 8844 { 8845 /* If we get here when building a static 8846 executable, then the libc startup function 8847 responsible for applying indirect function 8848 relocations is going to complain about 8849 the reloc type. 8850 If we get here when building a dynamic 8851 executable, it will be because we have 8852 a text relocation. The dynamic loader 8853 will set the text segment writable and 8854 non-executable to apply text relocations. 8855 So we'll segfault when trying to run the 8856 indirection function to resolve the reloc. */ 8857 info->callbacks->einfo 8858 (_("%P: %H: relocation %s for indirect " 8859 "function %s unsupported\n"), 8860 input_bfd, input_section, rel->r_offset, 8861 howto->name, 8862 sym_name); 8863 ret = FALSE; 8864 } 8865 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) 8866 ; 8867 else if (sec == NULL || sec->owner == NULL) 8868 { 8869 bfd_set_error (bfd_error_bad_value); 8870 ret = FALSE; 8871 } 8872 else 8873 { 8874 asection *osec; 8875 8876 /* We are turning this relocation into one 8877 against a section symbol. It would be 8878 proper to subtract the symbol's value, 8879 osec->vma, from the emitted reloc addend, 8880 but ld.so expects buggy relocs. 8881 FIXME: Why not always use a zero index? */ 8882 osec = sec->output_section; 8883 indx = elf_section_data (osec)->dynindx; 8884 if (indx == 0) 8885 { 8886 osec = htab->elf.text_index_section; 8887 indx = elf_section_data (osec)->dynindx; 8888 } 8889 BFD_ASSERT (indx != 0); 8890 #ifdef DEBUG 8891 if (indx == 0) 8892 printf ("indx=%ld section=%s flags=%08x name=%s\n", 8893 indx, osec->name, osec->flags, 8894 h->root.root.string); 8895 #endif 8896 } 8897 8898 outrel.r_info = ELF32_R_INFO (indx, r_type); 8899 } 8900 else if (ifunc != NULL) 8901 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8902 else 8903 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8904 } 8905 8906 loc = sreloc->contents; 8907 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 8908 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 8909 8910 if (skip == -1) 8911 goto copy_reloc; 8912 8913 /* This reloc will be computed at runtime. We clear the memory 8914 so that it contains predictable value. */ 8915 if (! skip 8916 && ((input_section->flags & SEC_ALLOC) != 0 8917 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) 8918 { 8919 relocation = howto->pc_relative ? outrel.r_offset : 0; 8920 addend = 0; 8921 break; 8922 } 8923 } 8924 break; 8925 8926 case R_PPC_RELAX_PLT: 8927 case R_PPC_RELAX_PLTREL24: 8928 if (h != NULL) 8929 { 8930 struct plt_entry *ent; 8931 bfd_vma got2_addend = 0; 8932 8933 if (r_type == R_PPC_RELAX_PLTREL24) 8934 { 8935 if (bfd_link_pic (info)) 8936 got2_addend = addend; 8937 addend = 0; 8938 } 8939 ent = find_plt_ent (&h->plt.plist, got2, got2_addend); 8940 if (htab->plt_type == PLT_NEW) 8941 relocation = (htab->glink->output_section->vma 8942 + htab->glink->output_offset 8943 + ent->glink_offset); 8944 else 8945 relocation = (htab->plt->output_section->vma 8946 + htab->plt->output_offset 8947 + ent->plt.offset); 8948 } 8949 /* Fall thru */ 8950 8951 case R_PPC_RELAX: 8952 { 8953 const int *stub; 8954 size_t size; 8955 size_t insn_offset = rel->r_offset; 8956 unsigned int insn; 8957 8958 if (bfd_link_pic (info)) 8959 { 8960 relocation -= (input_section->output_section->vma 8961 + input_section->output_offset 8962 + rel->r_offset - 4); 8963 stub = shared_stub_entry; 8964 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12); 8965 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8); 8966 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4); 8967 stub += 3; 8968 size = ARRAY_SIZE (shared_stub_entry) - 3; 8969 } 8970 else 8971 { 8972 stub = stub_entry; 8973 size = ARRAY_SIZE (stub_entry); 8974 } 8975 8976 relocation += addend; 8977 if (bfd_link_relocatable (info)) 8978 relocation = 0; 8979 8980 /* First insn is HA, second is LO. */ 8981 insn = *stub++; 8982 insn |= ((relocation + 0x8000) >> 16) & 0xffff; 8983 bfd_put_32 (output_bfd, insn, contents + insn_offset); 8984 insn_offset += 4; 8985 8986 insn = *stub++; 8987 insn |= relocation & 0xffff; 8988 bfd_put_32 (output_bfd, insn, contents + insn_offset); 8989 insn_offset += 4; 8990 size -= 2; 8991 8992 while (size != 0) 8993 { 8994 insn = *stub++; 8995 --size; 8996 bfd_put_32 (output_bfd, insn, contents + insn_offset); 8997 insn_offset += 4; 8998 } 8999 9000 /* Rewrite the reloc and convert one of the trailing nop 9001 relocs to describe this relocation. */ 9002 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE); 9003 /* The relocs are at the bottom 2 bytes */ 9004 wrel->r_offset = rel->r_offset + d_offset; 9005 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); 9006 wrel->r_addend = rel->r_addend; 9007 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel)); 9008 wrel++, rel++; 9009 wrel->r_offset += 4; 9010 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); 9011 } 9012 continue; 9013 9014 /* Indirect .sdata relocation. */ 9015 case R_PPC_EMB_SDAI16: 9016 BFD_ASSERT (htab->sdata[0].section != NULL); 9017 if (!is_static_defined (htab->sdata[0].sym)) 9018 { 9019 unresolved_reloc = TRUE; 9020 break; 9021 } 9022 relocation 9023 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], 9024 h, relocation, rel); 9025 addend = 0; 9026 break; 9027 9028 /* Indirect .sdata2 relocation. */ 9029 case R_PPC_EMB_SDA2I16: 9030 BFD_ASSERT (htab->sdata[1].section != NULL); 9031 if (!is_static_defined (htab->sdata[1].sym)) 9032 { 9033 unresolved_reloc = TRUE; 9034 break; 9035 } 9036 relocation 9037 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], 9038 h, relocation, rel); 9039 addend = 0; 9040 break; 9041 9042 /* Handle the TOC16 reloc. We want to use the offset within the .got 9043 section, not the actual VMA. This is appropriate when generating 9044 an embedded ELF object, for which the .got section acts like the 9045 AIX .toc section. */ 9046 case R_PPC_TOC16: /* phony GOT16 relocations */ 9047 if (sec == NULL || sec->output_section == NULL) 9048 { 9049 unresolved_reloc = TRUE; 9050 break; 9051 } 9052 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec), 9053 ".got") == 0 9054 || strcmp (bfd_get_section_name (sec->owner, sec), 9055 ".cgot") == 0); 9056 9057 addend -= sec->output_section->vma + sec->output_offset + 0x8000; 9058 break; 9059 9060 case R_PPC_PLTREL24: 9061 if (h != NULL && ifunc == NULL) 9062 { 9063 struct plt_entry *ent; 9064 9065 ent = find_plt_ent (&h->plt.plist, got2, 9066 bfd_link_pic (info) ? addend : 0); 9067 if (ent == NULL 9068 || htab->plt == NULL) 9069 { 9070 /* We didn't make a PLT entry for this symbol. This 9071 happens when statically linking PIC code, or when 9072 using -Bsymbolic. */ 9073 } 9074 else 9075 { 9076 /* Relocation is to the entry for this symbol in the 9077 procedure linkage table. */ 9078 unresolved_reloc = FALSE; 9079 if (htab->plt_type == PLT_NEW) 9080 relocation = (htab->glink->output_section->vma 9081 + htab->glink->output_offset 9082 + ent->glink_offset); 9083 else 9084 relocation = (htab->plt->output_section->vma 9085 + htab->plt->output_offset 9086 + ent->plt.offset); 9087 } 9088 } 9089 9090 /* R_PPC_PLTREL24 is rather special. If non-zero, the 9091 addend specifies the GOT pointer offset within .got2. 9092 Don't apply it to the relocation field. */ 9093 addend = 0; 9094 break; 9095 9096 /* Relocate against _SDA_BASE_. */ 9097 case R_PPC_SDAREL16: 9098 { 9099 const char *name; 9100 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 9101 9102 if (sec == NULL 9103 || sec->output_section == NULL 9104 || !is_static_defined (sda)) 9105 { 9106 unresolved_reloc = TRUE; 9107 break; 9108 } 9109 addend -= SYM_VAL (sda); 9110 9111 name = bfd_get_section_name (output_bfd, sec->output_section); 9112 if (!(strcmp (name, ".sdata") == 0 9113 || strcmp (name, ".sbss") == 0)) 9114 { 9115 info->callbacks->einfo 9116 (_("%P: %B: the target (%s) of a %s relocation is " 9117 "in the wrong output section (%s)\n"), 9118 input_bfd, 9119 sym_name, 9120 howto->name, 9121 name); 9122 } 9123 } 9124 break; 9125 9126 /* Relocate against _SDA2_BASE_. */ 9127 case R_PPC_EMB_SDA2REL: 9128 { 9129 const char *name; 9130 struct elf_link_hash_entry *sda = htab->sdata[1].sym; 9131 9132 if (sec == NULL 9133 || sec->output_section == NULL 9134 || !is_static_defined (sda)) 9135 { 9136 unresolved_reloc = TRUE; 9137 break; 9138 } 9139 addend -= SYM_VAL (sda); 9140 9141 name = bfd_get_section_name (output_bfd, sec->output_section); 9142 if (!(strcmp (name, ".sdata2") == 0 9143 || strcmp (name, ".sbss2") == 0)) 9144 { 9145 info->callbacks->einfo 9146 (_("%P: %B: the target (%s) of a %s relocation is " 9147 "in the wrong output section (%s)\n"), 9148 input_bfd, 9149 sym_name, 9150 howto->name, 9151 name); 9152 } 9153 } 9154 break; 9155 9156 case R_PPC_VLE_LO16A: 9157 relocation = relocation + addend; 9158 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9159 relocation, split16a_type); 9160 goto copy_reloc; 9161 9162 case R_PPC_VLE_LO16D: 9163 relocation = relocation + addend; 9164 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9165 relocation, split16d_type); 9166 goto copy_reloc; 9167 9168 case R_PPC_VLE_HI16A: 9169 relocation = (relocation + addend) >> 16; 9170 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9171 relocation, split16a_type); 9172 goto copy_reloc; 9173 9174 case R_PPC_VLE_HI16D: 9175 relocation = (relocation + addend) >> 16; 9176 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9177 relocation, split16d_type); 9178 goto copy_reloc; 9179 9180 case R_PPC_VLE_HA16A: 9181 relocation = (relocation + addend + 0x8000) >> 16; 9182 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9183 relocation, split16a_type); 9184 goto copy_reloc; 9185 9186 case R_PPC_VLE_HA16D: 9187 relocation = (relocation + addend + 0x8000) >> 16; 9188 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9189 relocation, split16d_type); 9190 goto copy_reloc; 9191 9192 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ 9193 case R_PPC_EMB_SDA21: 9194 case R_PPC_VLE_SDA21: 9195 case R_PPC_EMB_RELSDA: 9196 case R_PPC_VLE_SDA21_LO: 9197 { 9198 const char *name; 9199 int reg; 9200 unsigned int insn; 9201 struct elf_link_hash_entry *sda = NULL; 9202 9203 if (sec == NULL || sec->output_section == NULL) 9204 { 9205 unresolved_reloc = TRUE; 9206 break; 9207 } 9208 9209 name = bfd_get_section_name (output_bfd, sec->output_section); 9210 if (strcmp (name, ".sdata") == 0 9211 || strcmp (name, ".sbss") == 0) 9212 { 9213 reg = 13; 9214 sda = htab->sdata[0].sym; 9215 } 9216 else if (strcmp (name, ".sdata2") == 0 9217 || strcmp (name, ".sbss2") == 0) 9218 { 9219 reg = 2; 9220 sda = htab->sdata[1].sym; 9221 } 9222 else if (strcmp (name, ".PPC.EMB.sdata0") == 0 9223 || strcmp (name, ".PPC.EMB.sbss0") == 0) 9224 { 9225 reg = 0; 9226 } 9227 else 9228 { 9229 info->callbacks->einfo 9230 (_("%P: %B: the target (%s) of a %s relocation is " 9231 "in the wrong output section (%s)\n"), 9232 input_bfd, 9233 sym_name, 9234 howto->name, 9235 name); 9236 9237 bfd_set_error (bfd_error_bad_value); 9238 ret = FALSE; 9239 goto copy_reloc; 9240 } 9241 9242 if (sda != NULL) 9243 { 9244 if (!is_static_defined (sda)) 9245 { 9246 unresolved_reloc = TRUE; 9247 break; 9248 } 9249 addend -= SYM_VAL (sda); 9250 } 9251 9252 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 9253 if (reg == 0 9254 && (r_type == R_PPC_VLE_SDA21 9255 || r_type == R_PPC_VLE_SDA21_LO)) 9256 { 9257 relocation = relocation + addend; 9258 addend = 0; 9259 9260 /* Force e_li insn, keeping RT from original insn. */ 9261 insn &= 0x1f << 21; 9262 insn |= 28u << 26; 9263 9264 /* We have an li20 field, bits 17..20, 11..15, 21..31. */ 9265 /* Top 4 bits of value to 17..20. */ 9266 insn |= (relocation & 0xf0000) >> 5; 9267 /* Next 5 bits of the value to 11..15. */ 9268 insn |= (relocation & 0xf800) << 5; 9269 /* And the final 11 bits of the value to bits 21 to 31. */ 9270 insn |= relocation & 0x7ff; 9271 9272 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 9273 9274 if (r_type == R_PPC_VLE_SDA21 9275 && ((relocation + 0x80000) & 0xffffffff) > 0x100000) 9276 goto overflow; 9277 goto copy_reloc; 9278 } 9279 else if (r_type == R_PPC_EMB_SDA21 9280 || r_type == R_PPC_VLE_SDA21 9281 || r_type == R_PPC_VLE_SDA21_LO) 9282 { 9283 /* Fill in register field. */ 9284 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); 9285 } 9286 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 9287 } 9288 break; 9289 9290 case R_PPC_VLE_SDAREL_LO16A: 9291 case R_PPC_VLE_SDAREL_LO16D: 9292 case R_PPC_VLE_SDAREL_HI16A: 9293 case R_PPC_VLE_SDAREL_HI16D: 9294 case R_PPC_VLE_SDAREL_HA16A: 9295 case R_PPC_VLE_SDAREL_HA16D: 9296 { 9297 bfd_vma value; 9298 const char *name; 9299 //int reg; 9300 struct elf_link_hash_entry *sda = NULL; 9301 9302 if (sec == NULL || sec->output_section == NULL) 9303 { 9304 unresolved_reloc = TRUE; 9305 break; 9306 } 9307 9308 name = bfd_get_section_name (output_bfd, sec->output_section); 9309 if (strcmp (name, ".sdata") == 0 9310 || strcmp (name, ".sbss") == 0) 9311 { 9312 //reg = 13; 9313 sda = htab->sdata[0].sym; 9314 } 9315 else if (strcmp (name, ".sdata2") == 0 9316 || strcmp (name, ".sbss2") == 0) 9317 { 9318 //reg = 2; 9319 sda = htab->sdata[1].sym; 9320 } 9321 else 9322 { 9323 (*_bfd_error_handler) 9324 (_("%B: the target (%s) of a %s relocation is " 9325 "in the wrong output section (%s)"), 9326 input_bfd, 9327 sym_name, 9328 howto->name, 9329 name); 9330 9331 bfd_set_error (bfd_error_bad_value); 9332 ret = FALSE; 9333 goto copy_reloc; 9334 } 9335 9336 if (sda != NULL) 9337 { 9338 if (!is_static_defined (sda)) 9339 { 9340 unresolved_reloc = TRUE; 9341 break; 9342 } 9343 } 9344 9345 value = (sda->root.u.def.section->output_section->vma 9346 + sda->root.u.def.section->output_offset 9347 + addend); 9348 9349 if (r_type == R_PPC_VLE_SDAREL_LO16A) 9350 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9351 value, split16a_type); 9352 else if (r_type == R_PPC_VLE_SDAREL_LO16D) 9353 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9354 value, split16d_type); 9355 else if (r_type == R_PPC_VLE_SDAREL_HI16A) 9356 { 9357 value = value >> 16; 9358 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9359 value, split16a_type); 9360 } 9361 else if (r_type == R_PPC_VLE_SDAREL_HI16D) 9362 { 9363 value = value >> 16; 9364 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9365 value, split16d_type); 9366 } 9367 else if (r_type == R_PPC_VLE_SDAREL_HA16A) 9368 { 9369 value = (value + 0x8000) >> 16; 9370 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9371 value, split16a_type); 9372 } 9373 else if (r_type == R_PPC_VLE_SDAREL_HA16D) 9374 { 9375 value = (value + 0x8000) >> 16; 9376 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset, 9377 value, split16d_type); 9378 } 9379 } 9380 goto copy_reloc; 9381 9382 /* Relocate against the beginning of the section. */ 9383 case R_PPC_SECTOFF: 9384 case R_PPC_SECTOFF_LO: 9385 case R_PPC_SECTOFF_HI: 9386 case R_PPC_SECTOFF_HA: 9387 if (sec == NULL || sec->output_section == NULL) 9388 { 9389 unresolved_reloc = TRUE; 9390 break; 9391 } 9392 addend -= sec->output_section->vma; 9393 break; 9394 9395 /* Negative relocations. */ 9396 case R_PPC_EMB_NADDR32: 9397 case R_PPC_EMB_NADDR16: 9398 case R_PPC_EMB_NADDR16_LO: 9399 case R_PPC_EMB_NADDR16_HI: 9400 case R_PPC_EMB_NADDR16_HA: 9401 addend -= 2 * relocation; 9402 break; 9403 9404 case R_PPC_COPY: 9405 case R_PPC_GLOB_DAT: 9406 case R_PPC_JMP_SLOT: 9407 case R_PPC_RELATIVE: 9408 case R_PPC_IRELATIVE: 9409 case R_PPC_PLT32: 9410 case R_PPC_PLTREL32: 9411 case R_PPC_PLT16_LO: 9412 case R_PPC_PLT16_HI: 9413 case R_PPC_PLT16_HA: 9414 case R_PPC_ADDR30: 9415 case R_PPC_EMB_RELSEC16: 9416 case R_PPC_EMB_RELST_LO: 9417 case R_PPC_EMB_RELST_HI: 9418 case R_PPC_EMB_RELST_HA: 9419 case R_PPC_EMB_BIT_FLD: 9420 info->callbacks->einfo 9421 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"), 9422 input_bfd, 9423 howto->name, 9424 sym_name); 9425 9426 bfd_set_error (bfd_error_invalid_operation); 9427 ret = FALSE; 9428 goto copy_reloc; 9429 } 9430 9431 /* Do any further special processing. */ 9432 switch (r_type) 9433 { 9434 default: 9435 break; 9436 9437 case R_PPC_ADDR16_HA: 9438 case R_PPC_REL16_HA: 9439 case R_PPC_REL16DX_HA: 9440 case R_PPC_SECTOFF_HA: 9441 case R_PPC_TPREL16_HA: 9442 case R_PPC_DTPREL16_HA: 9443 case R_PPC_EMB_NADDR16_HA: 9444 case R_PPC_EMB_RELST_HA: 9445 /* It's just possible that this symbol is a weak symbol 9446 that's not actually defined anywhere. In that case, 9447 'sec' would be NULL, and we should leave the symbol 9448 alone (it will be set to zero elsewhere in the link). */ 9449 if (sec == NULL) 9450 break; 9451 /* Fall thru */ 9452 9453 case R_PPC_PLT16_HA: 9454 case R_PPC_GOT16_HA: 9455 case R_PPC_GOT_TLSGD16_HA: 9456 case R_PPC_GOT_TLSLD16_HA: 9457 case R_PPC_GOT_TPREL16_HA: 9458 case R_PPC_GOT_DTPREL16_HA: 9459 /* Add 0x10000 if sign bit in 0:15 is set. 9460 Bits 0:15 are not used. */ 9461 addend += 0x8000; 9462 break; 9463 9464 case R_PPC_ADDR16: 9465 case R_PPC_ADDR16_LO: 9466 case R_PPC_GOT16: 9467 case R_PPC_GOT16_LO: 9468 case R_PPC_SDAREL16: 9469 case R_PPC_SECTOFF: 9470 case R_PPC_SECTOFF_LO: 9471 case R_PPC_DTPREL16: 9472 case R_PPC_DTPREL16_LO: 9473 case R_PPC_TPREL16: 9474 case R_PPC_TPREL16_LO: 9475 case R_PPC_GOT_TLSGD16: 9476 case R_PPC_GOT_TLSGD16_LO: 9477 case R_PPC_GOT_TLSLD16: 9478 case R_PPC_GOT_TLSLD16_LO: 9479 case R_PPC_GOT_DTPREL16: 9480 case R_PPC_GOT_DTPREL16_LO: 9481 case R_PPC_GOT_TPREL16: 9482 case R_PPC_GOT_TPREL16_LO: 9483 { 9484 /* The 32-bit ABI lacks proper relocations to deal with 9485 certain 64-bit instructions. Prevent damage to bits 9486 that make up part of the insn opcode. */ 9487 unsigned int insn, mask, lobit; 9488 9489 insn = bfd_get_32 (output_bfd, 9490 contents + rel->r_offset - d_offset); 9491 mask = 0; 9492 if (is_insn_ds_form (insn)) 9493 mask = 3; 9494 else if (is_insn_dq_form (insn)) 9495 mask = 15; 9496 else 9497 break; 9498 relocation += addend; 9499 addend = insn & mask; 9500 lobit = mask & relocation; 9501 if (lobit != 0) 9502 { 9503 relocation ^= lobit; 9504 info->callbacks->einfo 9505 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"), 9506 input_bfd, input_section, rel->r_offset, 9507 howto->name, sym_name, mask + 1); 9508 bfd_set_error (bfd_error_bad_value); 9509 ret = FALSE; 9510 } 9511 } 9512 break; 9513 } 9514 9515 #ifdef DEBUG 9516 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " 9517 "offset = %ld, addend = %ld\n", 9518 howto->name, 9519 (int) r_type, 9520 sym_name, 9521 r_symndx, 9522 (long) rel->r_offset, 9523 (long) addend); 9524 #endif 9525 9526 if (unresolved_reloc 9527 && !((input_section->flags & SEC_DEBUGGING) != 0 9528 && h->def_dynamic) 9529 && _bfd_elf_section_offset (output_bfd, info, input_section, 9530 rel->r_offset) != (bfd_vma) -1) 9531 { 9532 info->callbacks->einfo 9533 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"), 9534 input_bfd, input_section, rel->r_offset, 9535 howto->name, 9536 sym_name); 9537 ret = FALSE; 9538 } 9539 9540 /* 16-bit fields in insns mostly have signed values, but a 9541 few insns have 16-bit unsigned values. Really, we should 9542 have different reloc types. */ 9543 if (howto->complain_on_overflow != complain_overflow_dont 9544 && howto->dst_mask == 0xffff 9545 && (input_section->flags & SEC_CODE) != 0) 9546 { 9547 enum complain_overflow complain = complain_overflow_signed; 9548 9549 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0) 9550 { 9551 unsigned int insn; 9552 9553 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); 9554 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) 9555 complain = complain_overflow_bitfield; 9556 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */ 9557 || (insn & (0x3f << 26)) == 24u << 26 /* ori */ 9558 || (insn & (0x3f << 26)) == 26u << 26 /* xori */) 9559 complain = complain_overflow_unsigned; 9560 } 9561 if (howto->complain_on_overflow != complain) 9562 { 9563 alt_howto = *howto; 9564 alt_howto.complain_on_overflow = complain; 9565 howto = &alt_howto; 9566 } 9567 } 9568 9569 if (r_type == R_PPC_REL16DX_HA) 9570 { 9571 /* Split field reloc isn't handled by _bfd_final_link_relocate. */ 9572 if (rel->r_offset + 4 > input_section->size) 9573 r = bfd_reloc_outofrange; 9574 else 9575 { 9576 unsigned int insn; 9577 9578 relocation += addend; 9579 relocation -= (rel->r_offset 9580 + input_section->output_offset 9581 + input_section->output_section->vma); 9582 relocation >>= 16; 9583 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 9584 insn &= ~0x1fffc1; 9585 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15); 9586 bfd_put_32 (input_bfd, insn, contents + rel->r_offset); 9587 r = bfd_reloc_ok; 9588 } 9589 } 9590 else 9591 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents, 9592 rel->r_offset, relocation, addend); 9593 9594 if (r != bfd_reloc_ok) 9595 { 9596 if (r == bfd_reloc_overflow) 9597 { 9598 overflow: 9599 /* On code like "if (foo) foo();" don't report overflow 9600 on a branch to zero when foo is undefined. */ 9601 if (!warned 9602 && !(h != NULL 9603 && (h->root.type == bfd_link_hash_undefweak 9604 || h->root.type == bfd_link_hash_undefined) 9605 && is_branch_reloc (r_type))) 9606 info->callbacks->reloc_overflow 9607 (info, (h ? &h->root : NULL), sym_name, howto->name, 9608 rel->r_addend, input_bfd, input_section, rel->r_offset); 9609 } 9610 else 9611 { 9612 info->callbacks->einfo 9613 (_("%P: %H: %s reloc against `%s': error %d\n"), 9614 input_bfd, input_section, rel->r_offset, 9615 howto->name, sym_name, (int) r); 9616 ret = FALSE; 9617 } 9618 } 9619 copy_reloc: 9620 if (wrel != rel) 9621 *wrel = *rel; 9622 } 9623 9624 if (wrel != rel) 9625 { 9626 Elf_Internal_Shdr *rel_hdr; 9627 size_t deleted = rel - wrel; 9628 9629 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); 9630 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; 9631 if (rel_hdr->sh_size == 0) 9632 { 9633 /* It is too late to remove an empty reloc section. Leave 9634 one NONE reloc. 9635 ??? What is wrong with an empty section??? */ 9636 rel_hdr->sh_size = rel_hdr->sh_entsize; 9637 deleted -= 1; 9638 wrel++; 9639 } 9640 relend = wrel; 9641 rel_hdr = _bfd_elf_single_rel_hdr (input_section); 9642 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; 9643 input_section->reloc_count -= deleted; 9644 } 9645 9646 #ifdef DEBUG 9647 fprintf (stderr, "\n"); 9648 #endif 9649 9650 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET 9651 && input_section->size != input_section->rawsize 9652 && (strcmp (input_section->output_section->name, ".init") == 0 9653 || strcmp (input_section->output_section->name, ".fini") == 0)) 9654 { 9655 /* Branch around the trampolines. */ 9656 unsigned int insn = B + input_section->size - input_section->rawsize; 9657 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize); 9658 } 9659 9660 if (htab->params->ppc476_workaround 9661 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET 9662 && (!bfd_link_relocatable (info) 9663 || (input_section->output_section->alignment_power 9664 >= htab->params->pagesize_p2))) 9665 { 9666 bfd_vma start_addr, end_addr, addr; 9667 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 9668 9669 if (relax_info->workaround_size != 0) 9670 { 9671 bfd_byte *p; 9672 unsigned int n; 9673 bfd_byte fill[4]; 9674 9675 bfd_put_32 (input_bfd, BA, fill); 9676 p = contents + input_section->size - relax_info->workaround_size; 9677 n = relax_info->workaround_size >> 2; 9678 while (n--) 9679 { 9680 memcpy (p, fill, 4); 9681 p += 4; 9682 } 9683 } 9684 9685 /* The idea is: Replace the last instruction on a page with a 9686 branch to a patch area. Put the insn there followed by a 9687 branch back to the next page. Complicated a little by 9688 needing to handle moved conditional branches, and by not 9689 wanting to touch data-in-text. */ 9690 9691 start_addr = (input_section->output_section->vma 9692 + input_section->output_offset); 9693 end_addr = (start_addr + input_section->size 9694 - relax_info->workaround_size); 9695 for (addr = ((start_addr & -pagesize) + pagesize - 4); 9696 addr < end_addr; 9697 addr += pagesize) 9698 { 9699 bfd_vma offset = addr - start_addr; 9700 Elf_Internal_Rela *lo, *hi; 9701 bfd_boolean is_data; 9702 bfd_vma patch_off, patch_addr; 9703 unsigned int insn; 9704 9705 /* Do we have a data reloc at this offset? If so, leave 9706 the word alone. */ 9707 is_data = FALSE; 9708 lo = relocs; 9709 hi = relend; 9710 rel = NULL; 9711 while (lo < hi) 9712 { 9713 rel = lo + (hi - lo) / 2; 9714 if (rel->r_offset < offset) 9715 lo = rel + 1; 9716 else if (rel->r_offset > offset + 3) 9717 hi = rel; 9718 else 9719 { 9720 switch (ELF32_R_TYPE (rel->r_info)) 9721 { 9722 case R_PPC_ADDR32: 9723 case R_PPC_UADDR32: 9724 case R_PPC_REL32: 9725 case R_PPC_ADDR30: 9726 is_data = TRUE; 9727 break; 9728 default: 9729 break; 9730 } 9731 break; 9732 } 9733 } 9734 if (is_data) 9735 continue; 9736 9737 /* Some instructions can be left alone too. Unconditional 9738 branches, except for bcctr with BO=0x14 (bctr, bctrl), 9739 avoid the icache failure. 9740 9741 The problem occurs due to prefetch across a page boundary 9742 where stale instructions can be fetched from the next 9743 page, and the mechanism for flushing these bad 9744 instructions fails under certain circumstances. The 9745 unconditional branches: 9746 1) Branch: b, bl, ba, bla, 9747 2) Branch Conditional: bc, bca, bcl, bcla, 9748 3) Branch Conditional to Link Register: bclr, bclrl, 9749 where (2) and (3) have BO=0x14 making them unconditional, 9750 prevent the bad prefetch because the prefetch itself is 9751 affected by these instructions. This happens even if the 9752 instruction is not executed. 9753 9754 A bctr example: 9755 . 9756 . lis 9,new_page@ha 9757 . addi 9,9,new_page@l 9758 . mtctr 9 9759 . bctr 9760 . nop 9761 . nop 9762 . new_page: 9763 . 9764 The bctr is not predicted taken due to ctr not being 9765 ready, so prefetch continues on past the bctr into the 9766 new page which might have stale instructions. If they 9767 fail to be flushed, then they will be executed after the 9768 bctr executes. Either of the following modifications 9769 prevent the bad prefetch from happening in the first 9770 place: 9771 . 9772 . lis 9,new_page@ha lis 9,new_page@ha 9773 . addi 9,9,new_page@l addi 9,9,new_page@l 9774 . mtctr 9 mtctr 9 9775 . bctr bctr 9776 . nop b somewhere_else 9777 . b somewhere_else nop 9778 . new_page: new_page: 9779 . */ 9780 insn = bfd_get_32 (input_bfd, contents + offset); 9781 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */ 9782 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/ 9783 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */ 9784 || ((insn & (0x3f << 26)) == (19u << 26) 9785 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */ 9786 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */ 9787 continue; 9788 9789 patch_addr = (start_addr + input_section->size 9790 - relax_info->workaround_size); 9791 patch_addr = (patch_addr + 15) & -16; 9792 patch_off = patch_addr - start_addr; 9793 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset); 9794 9795 if (rel != NULL 9796 && rel->r_offset >= offset 9797 && rel->r_offset < offset + 4) 9798 { 9799 asection *sreloc; 9800 9801 /* If the insn we are patching had a reloc, adjust the 9802 reloc r_offset so that the reloc applies to the moved 9803 location. This matters for -r and --emit-relocs. */ 9804 if (rel + 1 != relend) 9805 { 9806 Elf_Internal_Rela tmp = *rel; 9807 9808 /* Keep the relocs sorted by r_offset. */ 9809 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel)); 9810 relend[-1] = tmp; 9811 } 9812 relend[-1].r_offset += patch_off - offset; 9813 9814 /* Adjust REL16 addends too. */ 9815 switch (ELF32_R_TYPE (relend[-1].r_info)) 9816 { 9817 case R_PPC_REL16: 9818 case R_PPC_REL16_LO: 9819 case R_PPC_REL16_HI: 9820 case R_PPC_REL16_HA: 9821 relend[-1].r_addend += patch_off - offset; 9822 break; 9823 default: 9824 break; 9825 } 9826 9827 /* If we are building a PIE or shared library with 9828 non-PIC objects, perhaps we had a dynamic reloc too? 9829 If so, the dynamic reloc must move with the insn. */ 9830 sreloc = elf_section_data (input_section)->sreloc; 9831 if (sreloc != NULL) 9832 { 9833 Elf32_External_Rela *slo, *shi, *srelend; 9834 bfd_vma soffset; 9835 9836 slo = (Elf32_External_Rela *) sreloc->contents; 9837 shi = srelend = slo + sreloc->reloc_count; 9838 soffset = (offset + input_section->output_section->vma 9839 + input_section->output_offset); 9840 while (slo < shi) 9841 { 9842 Elf32_External_Rela *srel = slo + (shi - slo) / 2; 9843 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel, 9844 &outrel); 9845 if (outrel.r_offset < soffset) 9846 slo = srel + 1; 9847 else if (outrel.r_offset > soffset + 3) 9848 shi = srel; 9849 else 9850 { 9851 if (srel + 1 != srelend) 9852 { 9853 memmove (srel, srel + 1, 9854 (srelend - (srel + 1)) * sizeof (*srel)); 9855 srel = srelend - 1; 9856 } 9857 outrel.r_offset += patch_off - offset; 9858 bfd_elf32_swap_reloca_out (output_bfd, &outrel, 9859 (bfd_byte *) srel); 9860 break; 9861 } 9862 } 9863 } 9864 } 9865 else 9866 rel = NULL; 9867 9868 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */ 9869 && (insn & 2) == 0 /* relative */) 9870 { 9871 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000; 9872 9873 delta += offset - patch_off; 9874 if (bfd_link_relocatable (info) && rel != NULL) 9875 delta = 0; 9876 if (!bfd_link_relocatable (info) && rel != NULL) 9877 { 9878 enum elf_ppc_reloc_type r_type; 9879 9880 r_type = ELF32_R_TYPE (relend[-1].r_info); 9881 if (r_type == R_PPC_REL14_BRTAKEN) 9882 insn |= BRANCH_PREDICT_BIT; 9883 else if (r_type == R_PPC_REL14_BRNTAKEN) 9884 insn &= ~BRANCH_PREDICT_BIT; 9885 else 9886 BFD_ASSERT (r_type == R_PPC_REL14); 9887 9888 if ((r_type == R_PPC_REL14_BRTAKEN 9889 || r_type == R_PPC_REL14_BRNTAKEN) 9890 && delta + 0x8000 < 0x10000 9891 && (bfd_signed_vma) delta < 0) 9892 insn ^= BRANCH_PREDICT_BIT; 9893 } 9894 if (delta + 0x8000 < 0x10000) 9895 { 9896 bfd_put_32 (input_bfd, 9897 (insn & ~0xfffc) | (delta & 0xfffc), 9898 contents + patch_off); 9899 patch_off += 4; 9900 bfd_put_32 (input_bfd, 9901 B | ((offset + 4 - patch_off) & 0x3fffffc), 9902 contents + patch_off); 9903 patch_off += 4; 9904 } 9905 else 9906 { 9907 if (rel != NULL) 9908 { 9909 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info); 9910 9911 relend[-1].r_offset += 8; 9912 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24); 9913 } 9914 bfd_put_32 (input_bfd, 9915 (insn & ~0xfffc) | 8, 9916 contents + patch_off); 9917 patch_off += 4; 9918 bfd_put_32 (input_bfd, 9919 B | ((offset + 4 - patch_off) & 0x3fffffc), 9920 contents + patch_off); 9921 patch_off += 4; 9922 bfd_put_32 (input_bfd, 9923 B | ((delta - 8) & 0x3fffffc), 9924 contents + patch_off); 9925 patch_off += 4; 9926 } 9927 } 9928 else 9929 { 9930 bfd_put_32 (input_bfd, insn, contents + patch_off); 9931 patch_off += 4; 9932 bfd_put_32 (input_bfd, 9933 B | ((offset + 4 - patch_off) & 0x3fffffc), 9934 contents + patch_off); 9935 patch_off += 4; 9936 } 9937 BFD_ASSERT (patch_off <= input_section->size); 9938 relax_info->workaround_size = input_section->size - patch_off; 9939 } 9940 } 9941 9942 return ret; 9943 } 9944 9945 /* Finish up dynamic symbol handling. We set the contents of various 9947 dynamic sections here. */ 9948 9949 static bfd_boolean 9950 ppc_elf_finish_dynamic_symbol (bfd *output_bfd, 9951 struct bfd_link_info *info, 9952 struct elf_link_hash_entry *h, 9953 Elf_Internal_Sym *sym) 9954 { 9955 struct ppc_elf_link_hash_table *htab; 9956 struct plt_entry *ent; 9957 bfd_boolean doneone; 9958 9959 #ifdef DEBUG 9960 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", 9961 h->root.root.string); 9962 #endif 9963 9964 htab = ppc_elf_hash_table (info); 9965 BFD_ASSERT (htab->elf.dynobj != NULL); 9966 9967 doneone = FALSE; 9968 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 9969 if (ent->plt.offset != (bfd_vma) -1) 9970 { 9971 if (!doneone) 9972 { 9973 Elf_Internal_Rela rela; 9974 bfd_byte *loc; 9975 bfd_vma reloc_index; 9976 9977 if (htab->plt_type == PLT_NEW 9978 || !htab->elf.dynamic_sections_created 9979 || h->dynindx == -1) 9980 reloc_index = ent->plt.offset / 4; 9981 else 9982 { 9983 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) 9984 / htab->plt_slot_size); 9985 if (reloc_index > PLT_NUM_SINGLE_ENTRIES 9986 && htab->plt_type == PLT_OLD) 9987 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; 9988 } 9989 9990 /* This symbol has an entry in the procedure linkage table. 9991 Set it up. */ 9992 if (htab->plt_type == PLT_VXWORKS 9993 && htab->elf.dynamic_sections_created 9994 && h->dynindx != -1) 9995 { 9996 bfd_vma got_offset; 9997 const bfd_vma *plt_entry; 9998 9999 /* The first three entries in .got.plt are reserved. */ 10000 got_offset = (reloc_index + 3) * 4; 10001 10002 /* Use the right PLT. */ 10003 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry 10004 : ppc_elf_vxworks_plt_entry; 10005 10006 /* Fill in the .plt on VxWorks. */ 10007 if (bfd_link_pic (info)) 10008 { 10009 bfd_put_32 (output_bfd, 10010 plt_entry[0] | PPC_HA (got_offset), 10011 htab->plt->contents + ent->plt.offset + 0); 10012 bfd_put_32 (output_bfd, 10013 plt_entry[1] | PPC_LO (got_offset), 10014 htab->plt->contents + ent->plt.offset + 4); 10015 } 10016 else 10017 { 10018 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot); 10019 10020 bfd_put_32 (output_bfd, 10021 plt_entry[0] | PPC_HA (got_loc), 10022 htab->plt->contents + ent->plt.offset + 0); 10023 bfd_put_32 (output_bfd, 10024 plt_entry[1] | PPC_LO (got_loc), 10025 htab->plt->contents + ent->plt.offset + 4); 10026 } 10027 10028 bfd_put_32 (output_bfd, plt_entry[2], 10029 htab->plt->contents + ent->plt.offset + 8); 10030 bfd_put_32 (output_bfd, plt_entry[3], 10031 htab->plt->contents + ent->plt.offset + 12); 10032 10033 /* This instruction is an immediate load. The value loaded is 10034 the byte offset of the R_PPC_JMP_SLOT relocation from the 10035 start of the .rela.plt section. The value is stored in the 10036 low-order 16 bits of the load instruction. */ 10037 /* NOTE: It appears that this is now an index rather than a 10038 prescaled offset. */ 10039 bfd_put_32 (output_bfd, 10040 plt_entry[4] | reloc_index, 10041 htab->plt->contents + ent->plt.offset + 16); 10042 /* This instruction is a PC-relative branch whose target is 10043 the start of the PLT section. The address of this branch 10044 instruction is 20 bytes beyond the start of this PLT entry. 10045 The address is encoded in bits 6-29, inclusive. The value 10046 stored is right-shifted by two bits, permitting a 26-bit 10047 offset. */ 10048 bfd_put_32 (output_bfd, 10049 (plt_entry[5] 10050 | (-(ent->plt.offset + 20) & 0x03fffffc)), 10051 htab->plt->contents + ent->plt.offset + 20); 10052 bfd_put_32 (output_bfd, plt_entry[6], 10053 htab->plt->contents + ent->plt.offset + 24); 10054 bfd_put_32 (output_bfd, plt_entry[7], 10055 htab->plt->contents + ent->plt.offset + 28); 10056 10057 /* Fill in the GOT entry corresponding to this PLT slot with 10058 the address immediately after the "bctr" instruction 10059 in this PLT entry. */ 10060 bfd_put_32 (output_bfd, (htab->plt->output_section->vma 10061 + htab->plt->output_offset 10062 + ent->plt.offset + 16), 10063 htab->sgotplt->contents + got_offset); 10064 10065 if (!bfd_link_pic (info)) 10066 { 10067 /* Fill in a couple of entries in .rela.plt.unloaded. */ 10068 loc = htab->srelplt2->contents 10069 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index 10070 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) 10071 * sizeof (Elf32_External_Rela)); 10072 10073 /* Provide the @ha relocation for the first instruction. */ 10074 rela.r_offset = (htab->plt->output_section->vma 10075 + htab->plt->output_offset 10076 + ent->plt.offset + 2); 10077 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 10078 R_PPC_ADDR16_HA); 10079 rela.r_addend = got_offset; 10080 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10081 loc += sizeof (Elf32_External_Rela); 10082 10083 /* Provide the @l relocation for the second instruction. */ 10084 rela.r_offset = (htab->plt->output_section->vma 10085 + htab->plt->output_offset 10086 + ent->plt.offset + 6); 10087 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 10088 R_PPC_ADDR16_LO); 10089 rela.r_addend = got_offset; 10090 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10091 loc += sizeof (Elf32_External_Rela); 10092 10093 /* Provide a relocation for the GOT entry corresponding to this 10094 PLT slot. Point it at the middle of the .plt entry. */ 10095 rela.r_offset = (htab->sgotplt->output_section->vma 10096 + htab->sgotplt->output_offset 10097 + got_offset); 10098 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, 10099 R_PPC_ADDR32); 10100 rela.r_addend = ent->plt.offset + 16; 10101 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10102 } 10103 10104 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. 10105 In particular, the offset for the relocation is not the 10106 address of the PLT entry for this function, as specified 10107 by the ABI. Instead, the offset is set to the address of 10108 the GOT slot for this function. See EABI 4.4.4.1. */ 10109 rela.r_offset = (htab->sgotplt->output_section->vma 10110 + htab->sgotplt->output_offset 10111 + got_offset); 10112 10113 } 10114 else 10115 { 10116 asection *splt = htab->plt; 10117 if (!htab->elf.dynamic_sections_created 10118 || h->dynindx == -1) 10119 splt = htab->iplt; 10120 10121 rela.r_offset = (splt->output_section->vma 10122 + splt->output_offset 10123 + ent->plt.offset); 10124 if (htab->plt_type == PLT_OLD 10125 || !htab->elf.dynamic_sections_created 10126 || h->dynindx == -1) 10127 { 10128 /* We don't need to fill in the .plt. The ppc dynamic 10129 linker will fill it in. */ 10130 } 10131 else 10132 { 10133 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset 10134 + htab->glink->output_section->vma 10135 + htab->glink->output_offset); 10136 bfd_put_32 (output_bfd, val, 10137 splt->contents + ent->plt.offset); 10138 } 10139 } 10140 10141 /* Fill in the entry in the .rela.plt section. */ 10142 rela.r_addend = 0; 10143 if (!htab->elf.dynamic_sections_created 10144 || h->dynindx == -1) 10145 { 10146 BFD_ASSERT (h->type == STT_GNU_IFUNC 10147 && h->def_regular 10148 && (h->root.type == bfd_link_hash_defined 10149 || h->root.type == bfd_link_hash_defweak)); 10150 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 10151 rela.r_addend = SYM_VAL (h); 10152 } 10153 else 10154 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); 10155 10156 if (!htab->elf.dynamic_sections_created 10157 || h->dynindx == -1) 10158 loc = (htab->reliplt->contents 10159 + (htab->reliplt->reloc_count++ 10160 * sizeof (Elf32_External_Rela))); 10161 else 10162 loc = (htab->relplt->contents 10163 + reloc_index * sizeof (Elf32_External_Rela)); 10164 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10165 10166 if (!h->def_regular) 10167 { 10168 /* Mark the symbol as undefined, rather than as 10169 defined in the .plt section. Leave the value if 10170 there were any relocations where pointer equality 10171 matters (this is a clue for the dynamic linker, to 10172 make function pointer comparisons work between an 10173 application and shared library), otherwise set it 10174 to zero. */ 10175 sym->st_shndx = SHN_UNDEF; 10176 if (!h->pointer_equality_needed) 10177 sym->st_value = 0; 10178 else if (!h->ref_regular_nonweak) 10179 { 10180 /* This breaks function pointer comparisons, but 10181 that is better than breaking tests for a NULL 10182 function pointer. */ 10183 sym->st_value = 0; 10184 } 10185 } 10186 else if (h->type == STT_GNU_IFUNC 10187 && !bfd_link_pic (info)) 10188 { 10189 /* Set the value of ifunc symbols in a non-pie 10190 executable to the glink entry. This is to avoid 10191 text relocations. We can't do this for ifunc in 10192 allocate_dynrelocs, as we do for normal dynamic 10193 function symbols with plt entries, because we need 10194 to keep the original value around for the ifunc 10195 relocation. */ 10196 sym->st_shndx = (_bfd_elf_section_from_bfd_section 10197 (output_bfd, htab->glink->output_section)); 10198 sym->st_value = (ent->glink_offset 10199 + htab->glink->output_offset 10200 + htab->glink->output_section->vma); 10201 } 10202 doneone = TRUE; 10203 } 10204 10205 if (htab->plt_type == PLT_NEW 10206 || !htab->elf.dynamic_sections_created 10207 || h->dynindx == -1) 10208 { 10209 unsigned char *p; 10210 asection *splt = htab->plt; 10211 if (!htab->elf.dynamic_sections_created 10212 || h->dynindx == -1) 10213 splt = htab->iplt; 10214 10215 p = (unsigned char *) htab->glink->contents + ent->glink_offset; 10216 10217 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt) 10218 { 10219 bfd_put_32 (output_bfd, LWZ_11_3, p); 10220 p += 4; 10221 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p); 10222 p += 4; 10223 bfd_put_32 (output_bfd, MR_0_3, p); 10224 p += 4; 10225 bfd_put_32 (output_bfd, CMPWI_11_0, p); 10226 p += 4; 10227 bfd_put_32 (output_bfd, ADD_3_12_2, p); 10228 p += 4; 10229 bfd_put_32 (output_bfd, BEQLR, p); 10230 p += 4; 10231 bfd_put_32 (output_bfd, MR_3_0, p); 10232 p += 4; 10233 bfd_put_32 (output_bfd, NOP, p); 10234 p += 4; 10235 } 10236 10237 write_glink_stub (ent, splt, p, info); 10238 10239 if (!bfd_link_pic (info)) 10240 /* We only need one non-PIC glink stub. */ 10241 break; 10242 } 10243 else 10244 break; 10245 } 10246 10247 if (h->needs_copy) 10248 { 10249 asection *s; 10250 Elf_Internal_Rela rela; 10251 bfd_byte *loc; 10252 10253 /* This symbols needs a copy reloc. Set it up. */ 10254 10255 #ifdef DEBUG 10256 fprintf (stderr, ", copy"); 10257 #endif 10258 10259 BFD_ASSERT (h->dynindx != -1); 10260 10261 if (ppc_elf_hash_entry (h)->has_sda_refs) 10262 s = htab->relsbss; 10263 else 10264 s = htab->relbss; 10265 BFD_ASSERT (s != NULL); 10266 10267 rela.r_offset = SYM_VAL (h); 10268 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); 10269 rela.r_addend = 0; 10270 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 10271 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10272 } 10273 10274 #ifdef DEBUG 10275 fprintf (stderr, "\n"); 10276 #endif 10277 10278 return TRUE; 10279 } 10280 10281 static enum elf_reloc_type_class 10283 ppc_elf_reloc_type_class (const struct bfd_link_info *info, 10284 const asection *rel_sec, 10285 const Elf_Internal_Rela *rela) 10286 { 10287 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 10288 10289 if (rel_sec == htab->reliplt) 10290 return reloc_class_ifunc; 10291 10292 switch (ELF32_R_TYPE (rela->r_info)) 10293 { 10294 case R_PPC_RELATIVE: 10295 return reloc_class_relative; 10296 case R_PPC_JMP_SLOT: 10297 return reloc_class_plt; 10298 case R_PPC_COPY: 10299 return reloc_class_copy; 10300 default: 10301 return reloc_class_normal; 10302 } 10303 } 10304 10305 /* Finish up the dynamic sections. */ 10307 10308 static bfd_boolean 10309 ppc_elf_finish_dynamic_sections (bfd *output_bfd, 10310 struct bfd_link_info *info) 10311 { 10312 asection *sdyn; 10313 asection *splt; 10314 struct ppc_elf_link_hash_table *htab; 10315 bfd_vma got; 10316 bfd *dynobj; 10317 bfd_boolean ret = TRUE; 10318 10319 #ifdef DEBUG 10320 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); 10321 #endif 10322 10323 htab = ppc_elf_hash_table (info); 10324 dynobj = elf_hash_table (info)->dynobj; 10325 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 10326 if (htab->is_vxworks) 10327 splt = bfd_get_linker_section (dynobj, ".plt"); 10328 else 10329 splt = NULL; 10330 10331 got = 0; 10332 if (htab->elf.hgot != NULL) 10333 got = SYM_VAL (htab->elf.hgot); 10334 10335 if (htab->elf.dynamic_sections_created) 10336 { 10337 Elf32_External_Dyn *dyncon, *dynconend; 10338 10339 BFD_ASSERT (htab->plt != NULL && sdyn != NULL); 10340 10341 dyncon = (Elf32_External_Dyn *) sdyn->contents; 10342 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 10343 for (; dyncon < dynconend; dyncon++) 10344 { 10345 Elf_Internal_Dyn dyn; 10346 asection *s; 10347 10348 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 10349 10350 switch (dyn.d_tag) 10351 { 10352 case DT_PLTGOT: 10353 if (htab->is_vxworks) 10354 s = htab->sgotplt; 10355 else 10356 s = htab->plt; 10357 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 10358 break; 10359 10360 case DT_PLTRELSZ: 10361 dyn.d_un.d_val = htab->relplt->size; 10362 break; 10363 10364 case DT_JMPREL: 10365 s = htab->relplt; 10366 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 10367 break; 10368 10369 case DT_PPC_GOT: 10370 dyn.d_un.d_ptr = got; 10371 break; 10372 10373 case DT_RELASZ: 10374 if (htab->is_vxworks) 10375 { 10376 if (htab->relplt) 10377 dyn.d_un.d_ptr -= htab->relplt->size; 10378 break; 10379 } 10380 continue; 10381 10382 default: 10383 if (htab->is_vxworks 10384 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) 10385 break; 10386 continue; 10387 } 10388 10389 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 10390 } 10391 } 10392 10393 if (htab->got != NULL) 10394 { 10395 if (htab->elf.hgot->root.u.def.section == htab->got 10396 || htab->elf.hgot->root.u.def.section == htab->sgotplt) 10397 { 10398 unsigned char *p = htab->elf.hgot->root.u.def.section->contents; 10399 10400 p += htab->elf.hgot->root.u.def.value; 10401 if (htab->plt_type == PLT_OLD) 10402 { 10403 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 10404 so that a function can easily find the address of 10405 _GLOBAL_OFFSET_TABLE_. */ 10406 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4 10407 < htab->elf.hgot->root.u.def.section->size); 10408 bfd_put_32 (output_bfd, 0x4e800021, p - 4); 10409 } 10410 10411 if (sdyn != NULL) 10412 { 10413 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset; 10414 BFD_ASSERT (htab->elf.hgot->root.u.def.value 10415 < htab->elf.hgot->root.u.def.section->size); 10416 bfd_put_32 (output_bfd, val, p); 10417 } 10418 } 10419 else 10420 { 10421 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"), 10422 htab->elf.hgot->root.root.string, 10423 (htab->sgotplt != NULL 10424 ? htab->sgotplt->name : htab->got->name)); 10425 bfd_set_error (bfd_error_bad_value); 10426 ret = FALSE; 10427 } 10428 10429 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; 10430 } 10431 10432 /* Fill in the first entry in the VxWorks procedure linkage table. */ 10433 if (splt && splt->size > 0) 10434 { 10435 /* Use the right PLT. */ 10436 const bfd_vma *plt_entry = (bfd_link_pic (info) 10437 ? ppc_elf_vxworks_pic_plt0_entry 10438 : ppc_elf_vxworks_plt0_entry); 10439 10440 if (!bfd_link_pic (info)) 10441 { 10442 bfd_vma got_value = SYM_VAL (htab->elf.hgot); 10443 10444 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value), 10445 splt->contents + 0); 10446 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value), 10447 splt->contents + 4); 10448 } 10449 else 10450 { 10451 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); 10452 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); 10453 } 10454 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); 10455 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); 10456 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); 10457 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); 10458 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); 10459 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); 10460 10461 if (! bfd_link_pic (info)) 10462 { 10463 Elf_Internal_Rela rela; 10464 bfd_byte *loc; 10465 10466 loc = htab->srelplt2->contents; 10467 10468 /* Output the @ha relocation for the first instruction. */ 10469 rela.r_offset = (htab->plt->output_section->vma 10470 + htab->plt->output_offset 10471 + 2); 10472 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 10473 rela.r_addend = 0; 10474 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10475 loc += sizeof (Elf32_External_Rela); 10476 10477 /* Output the @l relocation for the second instruction. */ 10478 rela.r_offset = (htab->plt->output_section->vma 10479 + htab->plt->output_offset 10480 + 6); 10481 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 10482 rela.r_addend = 0; 10483 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 10484 loc += sizeof (Elf32_External_Rela); 10485 10486 /* Fix up the remaining relocations. They may have the wrong 10487 symbol index for _G_O_T_ or _P_L_T_ depending on the order 10488 in which symbols were output. */ 10489 while (loc < htab->srelplt2->contents + htab->srelplt2->size) 10490 { 10491 Elf_Internal_Rela rel; 10492 10493 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10494 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 10495 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10496 loc += sizeof (Elf32_External_Rela); 10497 10498 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10499 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 10500 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10501 loc += sizeof (Elf32_External_Rela); 10502 10503 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 10504 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); 10505 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 10506 loc += sizeof (Elf32_External_Rela); 10507 } 10508 } 10509 } 10510 10511 if (htab->glink != NULL 10512 && htab->glink->contents != NULL 10513 && htab->elf.dynamic_sections_created) 10514 { 10515 unsigned char *p; 10516 unsigned char *endp; 10517 bfd_vma res0; 10518 unsigned int i; 10519 10520 /* 10521 * PIC glink code is the following: 10522 * 10523 * # ith PLT code stub. 10524 * addis 11,30,(plt+(i-1)*4-got)@ha 10525 * lwz 11,(plt+(i-1)*4-got)@l(11) 10526 * mtctr 11 10527 * bctr 10528 * 10529 * # A table of branches, one for each plt entry. 10530 * # The idea is that the plt call stub loads ctr and r11 with these 10531 * # addresses, so (r11 - res_0) gives the plt index * 4. 10532 * res_0: b PLTresolve 10533 * res_1: b PLTresolve 10534 * . 10535 * # Some number of entries towards the end can be nops 10536 * res_n_m3: nop 10537 * res_n_m2: nop 10538 * res_n_m1: 10539 * 10540 * PLTresolve: 10541 * addis 11,11,(1f-res_0)@ha 10542 * mflr 0 10543 * bcl 20,31,1f 10544 * 1: addi 11,11,(1b-res_0)@l 10545 * mflr 12 10546 * mtlr 0 10547 * sub 11,11,12 # r11 = index * 4 10548 * addis 12,12,(got+4-1b)@ha 10549 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve 10550 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address 10551 * mtctr 0 10552 * add 0,11,11 10553 * add 11,0,11 # r11 = index * 12 = reloc offset. 10554 * bctr 10555 */ 10556 static const unsigned int pic_plt_resolve[] = 10557 { 10558 ADDIS_11_11, 10559 MFLR_0, 10560 BCL_20_31, 10561 ADDI_11_11, 10562 MFLR_12, 10563 MTLR_0, 10564 SUB_11_11_12, 10565 ADDIS_12_12, 10566 LWZ_0_12, 10567 LWZ_12_12, 10568 MTCTR_0, 10569 ADD_0_11_11, 10570 ADD_11_0_11, 10571 BCTR, 10572 NOP, 10573 NOP 10574 }; 10575 10576 /* 10577 * Non-PIC glink code is a little simpler. 10578 * 10579 * # ith PLT code stub. 10580 * lis 11,(plt+(i-1)*4)@ha 10581 * lwz 11,(plt+(i-1)*4)@l(11) 10582 * mtctr 11 10583 * bctr 10584 * 10585 * The branch table is the same, then comes 10586 * 10587 * PLTresolve: 10588 * lis 12,(got+4)@ha 10589 * addis 11,11,(-res_0)@ha 10590 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve 10591 * addi 11,11,(-res_0)@l # r11 = index * 4 10592 * mtctr 0 10593 * add 0,11,11 10594 * lwz 12,(got+8)@l(12) # got[2] contains the map address 10595 * add 11,0,11 # r11 = index * 12 = reloc offset. 10596 * bctr 10597 */ 10598 static const unsigned int plt_resolve[] = 10599 { 10600 LIS_12, 10601 ADDIS_11_11, 10602 LWZ_0_12, 10603 ADDI_11_11, 10604 MTCTR_0, 10605 ADD_0_11_11, 10606 LWZ_12_12, 10607 ADD_11_0_11, 10608 BCTR, 10609 NOP, 10610 NOP, 10611 NOP, 10612 NOP, 10613 NOP, 10614 NOP, 10615 NOP 10616 }; 10617 10618 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) 10619 abort (); 10620 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) 10621 abort (); 10622 10623 /* Build the branch table, one for each plt entry (less one), 10624 and perhaps some padding. */ 10625 p = htab->glink->contents; 10626 p += htab->glink_pltresolve; 10627 endp = htab->glink->contents; 10628 endp += htab->glink->size - GLINK_PLTRESOLVE; 10629 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4)) 10630 { 10631 bfd_put_32 (output_bfd, B + endp - p, p); 10632 p += 4; 10633 } 10634 while (p < endp) 10635 { 10636 bfd_put_32 (output_bfd, NOP, p); 10637 p += 4; 10638 } 10639 10640 res0 = (htab->glink_pltresolve 10641 + htab->glink->output_section->vma 10642 + htab->glink->output_offset); 10643 10644 if (htab->params->ppc476_workaround) 10645 { 10646 /* Ensure that a call stub at the end of a page doesn't 10647 result in prefetch over the end of the page into the 10648 glink branch table. */ 10649 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2; 10650 bfd_vma page_addr; 10651 bfd_vma glink_start = (htab->glink->output_section->vma 10652 + htab->glink->output_offset); 10653 10654 for (page_addr = res0 & -pagesize; 10655 page_addr > glink_start; 10656 page_addr -= pagesize) 10657 { 10658 /* We have a plt call stub that may need fixing. */ 10659 bfd_byte *loc; 10660 unsigned int insn; 10661 10662 loc = htab->glink->contents + page_addr - 4 - glink_start; 10663 insn = bfd_get_32 (output_bfd, loc); 10664 if (insn == BCTR) 10665 { 10666 /* By alignment, we know that there must be at least 10667 one other call stub before this one. */ 10668 insn = bfd_get_32 (output_bfd, loc - 16); 10669 if (insn == BCTR) 10670 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc); 10671 else 10672 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc); 10673 } 10674 } 10675 } 10676 10677 /* Last comes the PLTresolve stub. */ 10678 if (bfd_link_pic (info)) 10679 { 10680 bfd_vma bcl; 10681 10682 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) 10683 { 10684 unsigned int insn = pic_plt_resolve[i]; 10685 10686 if (htab->params->ppc476_workaround && insn == NOP) 10687 insn = BA + 0; 10688 bfd_put_32 (output_bfd, insn, p); 10689 p += 4; 10690 } 10691 p -= 4 * ARRAY_SIZE (pic_plt_resolve); 10692 10693 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 10694 + htab->glink->output_section->vma 10695 + htab->glink->output_offset); 10696 10697 bfd_put_32 (output_bfd, 10698 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); 10699 bfd_put_32 (output_bfd, 10700 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); 10701 bfd_put_32 (output_bfd, 10702 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); 10703 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) 10704 { 10705 bfd_put_32 (output_bfd, 10706 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 10707 bfd_put_32 (output_bfd, 10708 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); 10709 } 10710 else 10711 { 10712 bfd_put_32 (output_bfd, 10713 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 10714 bfd_put_32 (output_bfd, 10715 LWZ_12_12 + 4, p + 9*4); 10716 } 10717 } 10718 else 10719 { 10720 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) 10721 { 10722 unsigned int insn = plt_resolve[i]; 10723 10724 if (htab->params->ppc476_workaround && insn == NOP) 10725 insn = BA + 0; 10726 bfd_put_32 (output_bfd, insn, p); 10727 p += 4; 10728 } 10729 p -= 4 * ARRAY_SIZE (plt_resolve); 10730 10731 bfd_put_32 (output_bfd, 10732 LIS_12 + PPC_HA (got + 4), p + 0*4); 10733 bfd_put_32 (output_bfd, 10734 ADDIS_11_11 + PPC_HA (-res0), p + 1*4); 10735 bfd_put_32 (output_bfd, 10736 ADDI_11_11 + PPC_LO (-res0), p + 3*4); 10737 if (PPC_HA (got + 4) == PPC_HA (got + 8)) 10738 { 10739 bfd_put_32 (output_bfd, 10740 LWZ_0_12 + PPC_LO (got + 4), p + 2*4); 10741 bfd_put_32 (output_bfd, 10742 LWZ_12_12 + PPC_LO (got + 8), p + 6*4); 10743 } 10744 else 10745 { 10746 bfd_put_32 (output_bfd, 10747 LWZU_0_12 + PPC_LO (got + 4), p + 2*4); 10748 bfd_put_32 (output_bfd, 10749 LWZ_12_12 + 4, p + 6*4); 10750 } 10751 } 10752 } 10753 10754 if (htab->glink_eh_frame != NULL 10755 && htab->glink_eh_frame->contents != NULL) 10756 { 10757 unsigned char *p = htab->glink_eh_frame->contents; 10758 bfd_vma val; 10759 10760 p += sizeof (glink_eh_frame_cie); 10761 /* FDE length. */ 10762 p += 4; 10763 /* CIE pointer. */ 10764 p += 4; 10765 /* Offset to .glink. */ 10766 val = (htab->glink->output_section->vma 10767 + htab->glink->output_offset); 10768 val -= (htab->glink_eh_frame->output_section->vma 10769 + htab->glink_eh_frame->output_offset); 10770 val -= p - htab->glink_eh_frame->contents; 10771 bfd_put_32 (htab->elf.dynobj, val, p); 10772 10773 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME 10774 && !_bfd_elf_write_section_eh_frame (output_bfd, info, 10775 htab->glink_eh_frame, 10776 htab->glink_eh_frame->contents)) 10777 return FALSE; 10778 } 10779 10780 return ret; 10781 } 10782 10783 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec 10785 #define TARGET_LITTLE_NAME "elf32-powerpcle" 10786 #define TARGET_BIG_SYM powerpc_elf32_vec 10787 #define TARGET_BIG_NAME "elf32-powerpc" 10788 #define ELF_ARCH bfd_arch_powerpc 10789 #define ELF_TARGET_ID PPC32_ELF_DATA 10790 #define ELF_MACHINE_CODE EM_PPC 10791 #ifdef __QNXTARGET__ 10792 #define ELF_MAXPAGESIZE 0x1000 10793 #define ELF_COMMONPAGESIZE 0x1000 10794 #else 10795 #define ELF_MAXPAGESIZE 0x10000 10796 #define ELF_COMMONPAGESIZE 0x10000 10797 #endif 10798 #define ELF_MINPAGESIZE 0x1000 10799 #define elf_info_to_howto ppc_elf_info_to_howto 10800 10801 #ifdef EM_CYGNUS_POWERPC 10802 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC 10803 #endif 10804 10805 #ifdef EM_PPC_OLD 10806 #define ELF_MACHINE_ALT2 EM_PPC_OLD 10807 #endif 10808 10809 #define elf_backend_plt_not_loaded 1 10810 #define elf_backend_can_gc_sections 1 10811 #define elf_backend_can_refcount 1 10812 #define elf_backend_rela_normal 1 10813 #define elf_backend_caches_rawsize 1 10814 10815 #define bfd_elf32_mkobject ppc_elf_mkobject 10816 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data 10817 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section 10818 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup 10819 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup 10820 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags 10821 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create 10822 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab 10823 10824 #define elf_backend_object_p ppc_elf_object_p 10825 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook 10826 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook 10827 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr 10828 #define elf_backend_relocate_section ppc_elf_relocate_section 10829 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections 10830 #define elf_backend_check_relocs ppc_elf_check_relocs 10831 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol 10832 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol 10833 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook 10834 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections 10835 #define elf_backend_hash_symbol ppc_elf_hash_symbol 10836 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol 10837 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections 10838 #define elf_backend_fake_sections ppc_elf_fake_sections 10839 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers 10840 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map 10841 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus 10842 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo 10843 #define elf_backend_write_core_note ppc_elf_write_core_note 10844 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class 10845 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing 10846 #define elf_backend_final_write_processing ppc_elf_final_write_processing 10847 #define elf_backend_write_section ppc_elf_write_section 10848 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr 10849 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val 10850 #define elf_backend_action_discarded ppc_elf_action_discarded 10851 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 10852 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags 10853 #define elf_backend_section_processing ppc_elf_section_processing 10854 10855 #include "elf32-target.h" 10856 10857 /* FreeBSD Target */ 10858 10859 #undef TARGET_LITTLE_SYM 10860 #undef TARGET_LITTLE_NAME 10861 10862 #undef TARGET_BIG_SYM 10863 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec 10864 #undef TARGET_BIG_NAME 10865 #define TARGET_BIG_NAME "elf32-powerpc-freebsd" 10866 10867 #undef ELF_OSABI 10868 #define ELF_OSABI ELFOSABI_FREEBSD 10869 10870 #undef elf32_bed 10871 #define elf32_bed elf32_powerpc_fbsd_bed 10872 10873 #include "elf32-target.h" 10874 10875 /* VxWorks Target */ 10876 10877 #undef TARGET_LITTLE_SYM 10878 #undef TARGET_LITTLE_NAME 10879 10880 #undef TARGET_BIG_SYM 10881 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec 10882 #undef TARGET_BIG_NAME 10883 #define TARGET_BIG_NAME "elf32-powerpc-vxworks" 10884 10885 #undef ELF_OSABI 10886 10887 /* VxWorks uses the elf default section flags for .plt. */ 10888 static const struct bfd_elf_special_section * 10889 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 10890 { 10891 if (sec->name == NULL) 10892 return NULL; 10893 10894 if (strcmp (sec->name, ".plt") == 0) 10895 return _bfd_elf_get_sec_type_attr (abfd, sec); 10896 10897 return ppc_elf_get_sec_type_attr (abfd, sec); 10898 } 10899 10900 /* Like ppc_elf_link_hash_table_create, but overrides 10901 appropriately for VxWorks. */ 10902 static struct bfd_link_hash_table * 10903 ppc_elf_vxworks_link_hash_table_create (bfd *abfd) 10904 { 10905 struct bfd_link_hash_table *ret; 10906 10907 ret = ppc_elf_link_hash_table_create (abfd); 10908 if (ret) 10909 { 10910 struct ppc_elf_link_hash_table *htab 10911 = (struct ppc_elf_link_hash_table *)ret; 10912 htab->is_vxworks = 1; 10913 htab->plt_type = PLT_VXWORKS; 10914 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; 10915 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; 10916 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; 10917 } 10918 return ret; 10919 } 10920 10921 /* Tweak magic VxWorks symbols as they are loaded. */ 10922 static bfd_boolean 10923 ppc_elf_vxworks_add_symbol_hook (bfd *abfd, 10924 struct bfd_link_info *info, 10925 Elf_Internal_Sym *sym, 10926 const char **namep ATTRIBUTE_UNUSED, 10927 flagword *flagsp ATTRIBUTE_UNUSED, 10928 asection **secp, 10929 bfd_vma *valp) 10930 { 10931 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, 10932 valp)) 10933 return FALSE; 10934 10935 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp); 10936 } 10937 10938 static void 10939 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 10940 { 10941 ppc_elf_final_write_processing(abfd, linker); 10942 elf_vxworks_final_write_processing(abfd, linker); 10943 } 10944 10945 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so 10946 define it. */ 10947 #undef elf_backend_want_plt_sym 10948 #define elf_backend_want_plt_sym 1 10949 #undef elf_backend_want_got_plt 10950 #define elf_backend_want_got_plt 1 10951 #undef elf_backend_got_symbol_offset 10952 #define elf_backend_got_symbol_offset 0 10953 #undef elf_backend_plt_not_loaded 10954 #define elf_backend_plt_not_loaded 0 10955 #undef elf_backend_plt_readonly 10956 #define elf_backend_plt_readonly 1 10957 #undef elf_backend_got_header_size 10958 #define elf_backend_got_header_size 12 10959 10960 #undef bfd_elf32_get_synthetic_symtab 10961 10962 #undef bfd_elf32_bfd_link_hash_table_create 10963 #define bfd_elf32_bfd_link_hash_table_create \ 10964 ppc_elf_vxworks_link_hash_table_create 10965 #undef elf_backend_add_symbol_hook 10966 #define elf_backend_add_symbol_hook \ 10967 ppc_elf_vxworks_add_symbol_hook 10968 #undef elf_backend_link_output_symbol_hook 10969 #define elf_backend_link_output_symbol_hook \ 10970 elf_vxworks_link_output_symbol_hook 10971 #undef elf_backend_final_write_processing 10972 #define elf_backend_final_write_processing \ 10973 ppc_elf_vxworks_final_write_processing 10974 #undef elf_backend_get_sec_type_attr 10975 #define elf_backend_get_sec_type_attr \ 10976 ppc_elf_vxworks_get_sec_type_attr 10977 #undef elf_backend_emit_relocs 10978 #define elf_backend_emit_relocs \ 10979 elf_vxworks_emit_relocs 10980 10981 #undef elf32_bed 10982 #define elf32_bed ppc_elf_vxworks_bed 10983 #undef elf_backend_post_process_headers 10984 10985 #include "elf32-target.h" 10986
Indexes created Mon Mar 30 00:23:01 UTC 2026