elf32-ppc.c revision 1.1
1 /* PowerPC-specific support for 32-bit ELF 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 4 Free Software Foundation, Inc. 5 Written by Ian Lance Taylor, Cygnus Support. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the 21 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 22 Boston, MA 02110-1301, USA. */ 23 24 25 /* This file is based on a preliminary PowerPC ELF ABI. The 26 information may not match the final PowerPC ELF ABI. It includes 27 suggestions from the in-progress Embedded PowerPC ABI, and that 28 information may also not match. */ 29 30 #include "sysdep.h" 31 #include <stdarg.h> 32 #include "bfd.h" 33 #include "bfdlink.h" 34 #include "libbfd.h" 35 #include "elf-bfd.h" 36 #include "elf/ppc.h" 37 #include "elf32-ppc.h" 38 #include "elf-vxworks.h" 39 #include "dwarf2.h" 40 41 typedef enum split16_format_type 42 { 43 split16a_type = 0, 44 split16d_type 45 } 46 split16_format_type; 47 48 /* RELA relocations are used here. */ 49 50 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc 51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 52 static bfd_reloc_status_type ppc_elf_unhandled_reloc 53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 54 static void ppc_elf_vle_split16 55 (bfd *, bfd_byte *, bfd_vma, bfd_vma, split16_format_type); 56 57 /* Branch prediction bit for branch taken relocs. */ 58 #define BRANCH_PREDICT_BIT 0x200000 59 /* Mask to set RA in memory instructions. */ 60 #define RA_REGISTER_MASK 0x001f0000 61 /* Value to shift register by to insert RA. */ 62 #define RA_REGISTER_SHIFT 16 63 64 /* The name of the dynamic interpreter. This is put in the .interp 65 section. */ 66 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 67 68 /* For old-style PLT. */ 69 /* The number of single-slot PLT entries (the rest use two slots). */ 70 #define PLT_NUM_SINGLE_ENTRIES 8192 71 72 /* For new-style .glink and .plt. */ 73 #define GLINK_PLTRESOLVE 16*4 74 #define GLINK_ENTRY_SIZE 4*4 75 #define TLS_GET_ADDR_GLINK_SIZE 12*4 76 77 /* VxWorks uses its own plt layout, filled in by the static linker. */ 78 79 /* The standard VxWorks PLT entry. */ 80 #define VXWORKS_PLT_ENTRY_SIZE 32 81 static const bfd_vma ppc_elf_vxworks_plt_entry 82 [VXWORKS_PLT_ENTRY_SIZE / 4] = 83 { 84 0x3d800000, /* lis r12,0 */ 85 0x818c0000, /* lwz r12,0(r12) */ 86 0x7d8903a6, /* mtctr r12 */ 87 0x4e800420, /* bctr */ 88 0x39600000, /* li r11,0 */ 89 0x48000000, /* b 14 <.PLT0resolve+0x4> */ 90 0x60000000, /* nop */ 91 0x60000000, /* nop */ 92 }; 93 static const bfd_vma ppc_elf_vxworks_pic_plt_entry 94 [VXWORKS_PLT_ENTRY_SIZE / 4] = 95 { 96 0x3d9e0000, /* addis r12,r30,0 */ 97 0x818c0000, /* lwz r12,0(r12) */ 98 0x7d8903a6, /* mtctr r12 */ 99 0x4e800420, /* bctr */ 100 0x39600000, /* li r11,0 */ 101 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */ 102 0x60000000, /* nop */ 103 0x60000000, /* nop */ 104 }; 105 106 /* The initial VxWorks PLT entry. */ 107 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32 108 static const bfd_vma ppc_elf_vxworks_plt0_entry 109 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 110 { 111 0x3d800000, /* lis r12,0 */ 112 0x398c0000, /* addi r12,r12,0 */ 113 0x800c0008, /* lwz r0,8(r12) */ 114 0x7c0903a6, /* mtctr r0 */ 115 0x818c0004, /* lwz r12,4(r12) */ 116 0x4e800420, /* bctr */ 117 0x60000000, /* nop */ 118 0x60000000, /* nop */ 119 }; 120 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry 121 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] = 122 { 123 0x819e0008, /* lwz r12,8(r30) */ 124 0x7d8903a6, /* mtctr r12 */ 125 0x819e0004, /* lwz r12,4(r30) */ 126 0x4e800420, /* bctr */ 127 0x60000000, /* nop */ 128 0x60000000, /* nop */ 129 0x60000000, /* nop */ 130 0x60000000, /* nop */ 131 }; 132 133 /* For executables, we have some additional relocations in 134 .rela.plt.unloaded, for the kernel loader. */ 135 136 /* The number of non-JMP_SLOT relocations per PLT0 slot. */ 137 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3 138 /* The number of relocations in the PLTResolve slot. */ 139 #define VXWORKS_PLTRESOLVE_RELOCS 2 140 /* The number of relocations in the PLTResolve slot when when creating 141 a shared library. */ 142 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0 143 144 /* Some instructions. */ 145 #define ADDIS_11_11 0x3d6b0000 146 #define ADDIS_11_30 0x3d7e0000 147 #define ADDIS_12_12 0x3d8c0000 148 #define ADDI_11_11 0x396b0000 149 #define ADD_0_11_11 0x7c0b5a14 150 #define ADD_3_12_2 0x7c6c1214 151 #define ADD_11_0_11 0x7d605a14 152 #define B 0x48000000 153 #define BCL_20_31 0x429f0005 154 #define BCTR 0x4e800420 155 #define BEQLR 0x4d820020 156 #define CMPWI_11_0 0x2c0b0000 157 #define LIS_11 0x3d600000 158 #define LIS_12 0x3d800000 159 #define LWZU_0_12 0x840c0000 160 #define LWZ_0_12 0x800c0000 161 #define LWZ_11_3 0x81630000 162 #define LWZ_11_11 0x816b0000 163 #define LWZ_11_30 0x817e0000 164 #define LWZ_12_3 0x81830000 165 #define LWZ_12_12 0x818c0000 166 #define MR_0_3 0x7c601b78 167 #define MR_3_0 0x7c030378 168 #define MFLR_0 0x7c0802a6 169 #define MFLR_12 0x7d8802a6 170 #define MTCTR_0 0x7c0903a6 171 #define MTCTR_11 0x7d6903a6 172 #define MTLR_0 0x7c0803a6 173 #define NOP 0x60000000 174 #define SUB_11_11_12 0x7d6c5850 175 176 /* Offset of tp and dtp pointers from start of TLS block. */ 177 #define TP_OFFSET 0x7000 178 #define DTP_OFFSET 0x8000 179 180 /* The value of a defined global symbol. */ 181 #define SYM_VAL(SYM) \ 182 ((SYM)->root.u.def.section->output_section->vma \ 183 + (SYM)->root.u.def.section->output_offset \ 184 + (SYM)->root.u.def.value) 185 186 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; 188 189 static reloc_howto_type ppc_elf_howto_raw[] = { 190 /* This reloc does nothing. */ 191 HOWTO (R_PPC_NONE, /* type */ 192 0, /* rightshift */ 193 2, /* size (0 = byte, 1 = short, 2 = long) */ 194 32, /* bitsize */ 195 FALSE, /* pc_relative */ 196 0, /* bitpos */ 197 complain_overflow_bitfield, /* complain_on_overflow */ 198 bfd_elf_generic_reloc, /* special_function */ 199 "R_PPC_NONE", /* name */ 200 FALSE, /* partial_inplace */ 201 0, /* src_mask */ 202 0, /* dst_mask */ 203 FALSE), /* pcrel_offset */ 204 205 /* A standard 32 bit relocation. */ 206 HOWTO (R_PPC_ADDR32, /* type */ 207 0, /* rightshift */ 208 2, /* size (0 = byte, 1 = short, 2 = long) */ 209 32, /* bitsize */ 210 FALSE, /* pc_relative */ 211 0, /* bitpos */ 212 complain_overflow_bitfield, /* complain_on_overflow */ 213 bfd_elf_generic_reloc, /* special_function */ 214 "R_PPC_ADDR32", /* name */ 215 FALSE, /* partial_inplace */ 216 0, /* src_mask */ 217 0xffffffff, /* dst_mask */ 218 FALSE), /* pcrel_offset */ 219 220 /* An absolute 26 bit branch; the lower two bits must be zero. 221 FIXME: we don't check that, we just clear them. */ 222 HOWTO (R_PPC_ADDR24, /* type */ 223 0, /* rightshift */ 224 2, /* size (0 = byte, 1 = short, 2 = long) */ 225 26, /* bitsize */ 226 FALSE, /* pc_relative */ 227 0, /* bitpos */ 228 complain_overflow_bitfield, /* complain_on_overflow */ 229 bfd_elf_generic_reloc, /* special_function */ 230 "R_PPC_ADDR24", /* name */ 231 FALSE, /* partial_inplace */ 232 0, /* src_mask */ 233 0x3fffffc, /* dst_mask */ 234 FALSE), /* pcrel_offset */ 235 236 /* A standard 16 bit relocation. */ 237 HOWTO (R_PPC_ADDR16, /* type */ 238 0, /* rightshift */ 239 1, /* size (0 = byte, 1 = short, 2 = long) */ 240 16, /* bitsize */ 241 FALSE, /* pc_relative */ 242 0, /* bitpos */ 243 complain_overflow_bitfield, /* complain_on_overflow */ 244 bfd_elf_generic_reloc, /* special_function */ 245 "R_PPC_ADDR16", /* name */ 246 FALSE, /* partial_inplace */ 247 0, /* src_mask */ 248 0xffff, /* dst_mask */ 249 FALSE), /* pcrel_offset */ 250 251 /* A 16 bit relocation without overflow. */ 252 HOWTO (R_PPC_ADDR16_LO, /* type */ 253 0, /* rightshift */ 254 1, /* size (0 = byte, 1 = short, 2 = long) */ 255 16, /* bitsize */ 256 FALSE, /* pc_relative */ 257 0, /* bitpos */ 258 complain_overflow_dont,/* complain_on_overflow */ 259 bfd_elf_generic_reloc, /* special_function */ 260 "R_PPC_ADDR16_LO", /* name */ 261 FALSE, /* partial_inplace */ 262 0, /* src_mask */ 263 0xffff, /* dst_mask */ 264 FALSE), /* pcrel_offset */ 265 266 /* The high order 16 bits of an address. */ 267 HOWTO (R_PPC_ADDR16_HI, /* type */ 268 16, /* rightshift */ 269 1, /* size (0 = byte, 1 = short, 2 = long) */ 270 16, /* bitsize */ 271 FALSE, /* pc_relative */ 272 0, /* bitpos */ 273 complain_overflow_dont, /* complain_on_overflow */ 274 bfd_elf_generic_reloc, /* special_function */ 275 "R_PPC_ADDR16_HI", /* name */ 276 FALSE, /* partial_inplace */ 277 0, /* src_mask */ 278 0xffff, /* dst_mask */ 279 FALSE), /* pcrel_offset */ 280 281 /* The high order 16 bits of an address, plus 1 if the contents of 282 the low 16 bits, treated as a signed number, is negative. */ 283 HOWTO (R_PPC_ADDR16_HA, /* type */ 284 16, /* rightshift */ 285 1, /* size (0 = byte, 1 = short, 2 = long) */ 286 16, /* bitsize */ 287 FALSE, /* pc_relative */ 288 0, /* bitpos */ 289 complain_overflow_dont, /* complain_on_overflow */ 290 ppc_elf_addr16_ha_reloc, /* special_function */ 291 "R_PPC_ADDR16_HA", /* name */ 292 FALSE, /* partial_inplace */ 293 0, /* src_mask */ 294 0xffff, /* dst_mask */ 295 FALSE), /* pcrel_offset */ 296 297 /* An absolute 16 bit branch; the lower two bits must be zero. 298 FIXME: we don't check that, we just clear them. */ 299 HOWTO (R_PPC_ADDR14, /* type */ 300 0, /* rightshift */ 301 2, /* size (0 = byte, 1 = short, 2 = long) */ 302 16, /* bitsize */ 303 FALSE, /* pc_relative */ 304 0, /* bitpos */ 305 complain_overflow_bitfield, /* complain_on_overflow */ 306 bfd_elf_generic_reloc, /* special_function */ 307 "R_PPC_ADDR14", /* name */ 308 FALSE, /* partial_inplace */ 309 0, /* src_mask */ 310 0xfffc, /* dst_mask */ 311 FALSE), /* pcrel_offset */ 312 313 /* An absolute 16 bit branch, for which bit 10 should be set to 314 indicate that the branch is expected to be taken. The lower two 315 bits must be zero. */ 316 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ 317 0, /* rightshift */ 318 2, /* size (0 = byte, 1 = short, 2 = long) */ 319 16, /* bitsize */ 320 FALSE, /* pc_relative */ 321 0, /* bitpos */ 322 complain_overflow_bitfield, /* complain_on_overflow */ 323 bfd_elf_generic_reloc, /* special_function */ 324 "R_PPC_ADDR14_BRTAKEN",/* name */ 325 FALSE, /* partial_inplace */ 326 0, /* src_mask */ 327 0xfffc, /* dst_mask */ 328 FALSE), /* pcrel_offset */ 329 330 /* An absolute 16 bit branch, for which bit 10 should be set to 331 indicate that the branch is not expected to be taken. The lower 332 two bits must be zero. */ 333 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ 334 0, /* rightshift */ 335 2, /* size (0 = byte, 1 = short, 2 = long) */ 336 16, /* bitsize */ 337 FALSE, /* pc_relative */ 338 0, /* bitpos */ 339 complain_overflow_bitfield, /* complain_on_overflow */ 340 bfd_elf_generic_reloc, /* special_function */ 341 "R_PPC_ADDR14_BRNTAKEN",/* name */ 342 FALSE, /* partial_inplace */ 343 0, /* src_mask */ 344 0xfffc, /* dst_mask */ 345 FALSE), /* pcrel_offset */ 346 347 /* A relative 26 bit branch; the lower two bits must be zero. */ 348 HOWTO (R_PPC_REL24, /* type */ 349 0, /* rightshift */ 350 2, /* size (0 = byte, 1 = short, 2 = long) */ 351 26, /* bitsize */ 352 TRUE, /* pc_relative */ 353 0, /* bitpos */ 354 complain_overflow_signed, /* complain_on_overflow */ 355 bfd_elf_generic_reloc, /* special_function */ 356 "R_PPC_REL24", /* name */ 357 FALSE, /* partial_inplace */ 358 0, /* src_mask */ 359 0x3fffffc, /* dst_mask */ 360 TRUE), /* pcrel_offset */ 361 362 /* A relative 16 bit branch; the lower two bits must be zero. */ 363 HOWTO (R_PPC_REL14, /* type */ 364 0, /* rightshift */ 365 2, /* size (0 = byte, 1 = short, 2 = long) */ 366 16, /* bitsize */ 367 TRUE, /* pc_relative */ 368 0, /* bitpos */ 369 complain_overflow_signed, /* complain_on_overflow */ 370 bfd_elf_generic_reloc, /* special_function */ 371 "R_PPC_REL14", /* name */ 372 FALSE, /* partial_inplace */ 373 0, /* src_mask */ 374 0xfffc, /* dst_mask */ 375 TRUE), /* pcrel_offset */ 376 377 /* A relative 16 bit branch. Bit 10 should be set to indicate that 378 the branch is expected to be taken. The lower two bits must be 379 zero. */ 380 HOWTO (R_PPC_REL14_BRTAKEN, /* type */ 381 0, /* rightshift */ 382 2, /* size (0 = byte, 1 = short, 2 = long) */ 383 16, /* bitsize */ 384 TRUE, /* pc_relative */ 385 0, /* bitpos */ 386 complain_overflow_signed, /* complain_on_overflow */ 387 bfd_elf_generic_reloc, /* special_function */ 388 "R_PPC_REL14_BRTAKEN", /* name */ 389 FALSE, /* partial_inplace */ 390 0, /* src_mask */ 391 0xfffc, /* dst_mask */ 392 TRUE), /* pcrel_offset */ 393 394 /* A relative 16 bit branch. Bit 10 should be set to indicate that 395 the branch is not expected to be taken. The lower two bits must 396 be zero. */ 397 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ 398 0, /* rightshift */ 399 2, /* size (0 = byte, 1 = short, 2 = long) */ 400 16, /* bitsize */ 401 TRUE, /* pc_relative */ 402 0, /* bitpos */ 403 complain_overflow_signed, /* complain_on_overflow */ 404 bfd_elf_generic_reloc, /* special_function */ 405 "R_PPC_REL14_BRNTAKEN",/* name */ 406 FALSE, /* partial_inplace */ 407 0, /* src_mask */ 408 0xfffc, /* dst_mask */ 409 TRUE), /* pcrel_offset */ 410 411 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the 412 symbol. */ 413 HOWTO (R_PPC_GOT16, /* type */ 414 0, /* rightshift */ 415 1, /* size (0 = byte, 1 = short, 2 = long) */ 416 16, /* bitsize */ 417 FALSE, /* pc_relative */ 418 0, /* bitpos */ 419 complain_overflow_signed, /* complain_on_overflow */ 420 bfd_elf_generic_reloc, /* special_function */ 421 "R_PPC_GOT16", /* name */ 422 FALSE, /* partial_inplace */ 423 0, /* src_mask */ 424 0xffff, /* dst_mask */ 425 FALSE), /* pcrel_offset */ 426 427 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for 428 the symbol. */ 429 HOWTO (R_PPC_GOT16_LO, /* type */ 430 0, /* rightshift */ 431 1, /* size (0 = byte, 1 = short, 2 = long) */ 432 16, /* bitsize */ 433 FALSE, /* pc_relative */ 434 0, /* bitpos */ 435 complain_overflow_dont, /* complain_on_overflow */ 436 bfd_elf_generic_reloc, /* special_function */ 437 "R_PPC_GOT16_LO", /* name */ 438 FALSE, /* partial_inplace */ 439 0, /* src_mask */ 440 0xffff, /* dst_mask */ 441 FALSE), /* pcrel_offset */ 442 443 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for 444 the symbol. */ 445 HOWTO (R_PPC_GOT16_HI, /* type */ 446 16, /* rightshift */ 447 1, /* size (0 = byte, 1 = short, 2 = long) */ 448 16, /* bitsize */ 449 FALSE, /* pc_relative */ 450 0, /* bitpos */ 451 complain_overflow_bitfield, /* complain_on_overflow */ 452 bfd_elf_generic_reloc, /* special_function */ 453 "R_PPC_GOT16_HI", /* name */ 454 FALSE, /* partial_inplace */ 455 0, /* src_mask */ 456 0xffff, /* dst_mask */ 457 FALSE), /* pcrel_offset */ 458 459 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for 460 the symbol. */ 461 HOWTO (R_PPC_GOT16_HA, /* type */ 462 16, /* rightshift */ 463 1, /* size (0 = byte, 1 = short, 2 = long) */ 464 16, /* bitsize */ 465 FALSE, /* pc_relative */ 466 0, /* bitpos */ 467 complain_overflow_bitfield, /* complain_on_overflow */ 468 ppc_elf_addr16_ha_reloc, /* special_function */ 469 "R_PPC_GOT16_HA", /* name */ 470 FALSE, /* partial_inplace */ 471 0, /* src_mask */ 472 0xffff, /* dst_mask */ 473 FALSE), /* pcrel_offset */ 474 475 /* Like R_PPC_REL24, but referring to the procedure linkage table 476 entry for the symbol. */ 477 HOWTO (R_PPC_PLTREL24, /* type */ 478 0, /* rightshift */ 479 2, /* size (0 = byte, 1 = short, 2 = long) */ 480 26, /* bitsize */ 481 TRUE, /* pc_relative */ 482 0, /* bitpos */ 483 complain_overflow_signed, /* complain_on_overflow */ 484 bfd_elf_generic_reloc, /* special_function */ 485 "R_PPC_PLTREL24", /* name */ 486 FALSE, /* partial_inplace */ 487 0, /* src_mask */ 488 0x3fffffc, /* dst_mask */ 489 TRUE), /* pcrel_offset */ 490 491 /* This is used only by the dynamic linker. The symbol should exist 492 both in the object being run and in some shared library. The 493 dynamic linker copies the data addressed by the symbol from the 494 shared library into the object, because the object being 495 run has to have the data at some particular address. */ 496 HOWTO (R_PPC_COPY, /* type */ 497 0, /* rightshift */ 498 2, /* size (0 = byte, 1 = short, 2 = long) */ 499 32, /* bitsize */ 500 FALSE, /* pc_relative */ 501 0, /* bitpos */ 502 complain_overflow_bitfield, /* complain_on_overflow */ 503 bfd_elf_generic_reloc, /* special_function */ 504 "R_PPC_COPY", /* name */ 505 FALSE, /* partial_inplace */ 506 0, /* src_mask */ 507 0, /* dst_mask */ 508 FALSE), /* pcrel_offset */ 509 510 /* Like R_PPC_ADDR32, but used when setting global offset table 511 entries. */ 512 HOWTO (R_PPC_GLOB_DAT, /* type */ 513 0, /* rightshift */ 514 2, /* size (0 = byte, 1 = short, 2 = long) */ 515 32, /* bitsize */ 516 FALSE, /* pc_relative */ 517 0, /* bitpos */ 518 complain_overflow_bitfield, /* complain_on_overflow */ 519 bfd_elf_generic_reloc, /* special_function */ 520 "R_PPC_GLOB_DAT", /* name */ 521 FALSE, /* partial_inplace */ 522 0, /* src_mask */ 523 0xffffffff, /* dst_mask */ 524 FALSE), /* pcrel_offset */ 525 526 /* Marks a procedure linkage table entry for a symbol. */ 527 HOWTO (R_PPC_JMP_SLOT, /* type */ 528 0, /* rightshift */ 529 2, /* size (0 = byte, 1 = short, 2 = long) */ 530 32, /* bitsize */ 531 FALSE, /* pc_relative */ 532 0, /* bitpos */ 533 complain_overflow_bitfield, /* complain_on_overflow */ 534 bfd_elf_generic_reloc, /* special_function */ 535 "R_PPC_JMP_SLOT", /* name */ 536 FALSE, /* partial_inplace */ 537 0, /* src_mask */ 538 0, /* dst_mask */ 539 FALSE), /* pcrel_offset */ 540 541 /* Used only by the dynamic linker. When the object is run, this 542 longword is set to the load address of the object, plus the 543 addend. */ 544 HOWTO (R_PPC_RELATIVE, /* type */ 545 0, /* rightshift */ 546 2, /* size (0 = byte, 1 = short, 2 = long) */ 547 32, /* bitsize */ 548 FALSE, /* pc_relative */ 549 0, /* bitpos */ 550 complain_overflow_bitfield, /* complain_on_overflow */ 551 bfd_elf_generic_reloc, /* special_function */ 552 "R_PPC_RELATIVE", /* name */ 553 FALSE, /* partial_inplace */ 554 0, /* src_mask */ 555 0xffffffff, /* dst_mask */ 556 FALSE), /* pcrel_offset */ 557 558 /* Like R_PPC_REL24, but uses the value of the symbol within the 559 object rather than the final value. Normally used for 560 _GLOBAL_OFFSET_TABLE_. */ 561 HOWTO (R_PPC_LOCAL24PC, /* type */ 562 0, /* rightshift */ 563 2, /* size (0 = byte, 1 = short, 2 = long) */ 564 26, /* bitsize */ 565 TRUE, /* pc_relative */ 566 0, /* bitpos */ 567 complain_overflow_signed, /* complain_on_overflow */ 568 bfd_elf_generic_reloc, /* special_function */ 569 "R_PPC_LOCAL24PC", /* name */ 570 FALSE, /* partial_inplace */ 571 0, /* src_mask */ 572 0x3fffffc, /* dst_mask */ 573 TRUE), /* pcrel_offset */ 574 575 /* Like R_PPC_ADDR32, but may be unaligned. */ 576 HOWTO (R_PPC_UADDR32, /* type */ 577 0, /* rightshift */ 578 2, /* size (0 = byte, 1 = short, 2 = long) */ 579 32, /* bitsize */ 580 FALSE, /* pc_relative */ 581 0, /* bitpos */ 582 complain_overflow_bitfield, /* complain_on_overflow */ 583 bfd_elf_generic_reloc, /* special_function */ 584 "R_PPC_UADDR32", /* name */ 585 FALSE, /* partial_inplace */ 586 0, /* src_mask */ 587 0xffffffff, /* dst_mask */ 588 FALSE), /* pcrel_offset */ 589 590 /* Like R_PPC_ADDR16, but may be unaligned. */ 591 HOWTO (R_PPC_UADDR16, /* type */ 592 0, /* rightshift */ 593 1, /* size (0 = byte, 1 = short, 2 = long) */ 594 16, /* bitsize */ 595 FALSE, /* pc_relative */ 596 0, /* bitpos */ 597 complain_overflow_bitfield, /* complain_on_overflow */ 598 bfd_elf_generic_reloc, /* special_function */ 599 "R_PPC_UADDR16", /* name */ 600 FALSE, /* partial_inplace */ 601 0, /* src_mask */ 602 0xffff, /* dst_mask */ 603 FALSE), /* pcrel_offset */ 604 605 /* 32-bit PC relative */ 606 HOWTO (R_PPC_REL32, /* type */ 607 0, /* rightshift */ 608 2, /* size (0 = byte, 1 = short, 2 = long) */ 609 32, /* bitsize */ 610 TRUE, /* pc_relative */ 611 0, /* bitpos */ 612 complain_overflow_bitfield, /* complain_on_overflow */ 613 bfd_elf_generic_reloc, /* special_function */ 614 "R_PPC_REL32", /* name */ 615 FALSE, /* partial_inplace */ 616 0, /* src_mask */ 617 0xffffffff, /* dst_mask */ 618 TRUE), /* pcrel_offset */ 619 620 /* 32-bit relocation to the symbol's procedure linkage table. 621 FIXME: not supported. */ 622 HOWTO (R_PPC_PLT32, /* type */ 623 0, /* rightshift */ 624 2, /* size (0 = byte, 1 = short, 2 = long) */ 625 32, /* bitsize */ 626 FALSE, /* pc_relative */ 627 0, /* bitpos */ 628 complain_overflow_bitfield, /* complain_on_overflow */ 629 bfd_elf_generic_reloc, /* special_function */ 630 "R_PPC_PLT32", /* name */ 631 FALSE, /* partial_inplace */ 632 0, /* src_mask */ 633 0, /* dst_mask */ 634 FALSE), /* pcrel_offset */ 635 636 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 637 FIXME: not supported. */ 638 HOWTO (R_PPC_PLTREL32, /* type */ 639 0, /* rightshift */ 640 2, /* size (0 = byte, 1 = short, 2 = long) */ 641 32, /* bitsize */ 642 TRUE, /* pc_relative */ 643 0, /* bitpos */ 644 complain_overflow_bitfield, /* complain_on_overflow */ 645 bfd_elf_generic_reloc, /* special_function */ 646 "R_PPC_PLTREL32", /* name */ 647 FALSE, /* partial_inplace */ 648 0, /* src_mask */ 649 0, /* dst_mask */ 650 TRUE), /* pcrel_offset */ 651 652 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for 653 the symbol. */ 654 HOWTO (R_PPC_PLT16_LO, /* type */ 655 0, /* rightshift */ 656 1, /* size (0 = byte, 1 = short, 2 = long) */ 657 16, /* bitsize */ 658 FALSE, /* pc_relative */ 659 0, /* bitpos */ 660 complain_overflow_dont, /* complain_on_overflow */ 661 bfd_elf_generic_reloc, /* special_function */ 662 "R_PPC_PLT16_LO", /* name */ 663 FALSE, /* partial_inplace */ 664 0, /* src_mask */ 665 0xffff, /* dst_mask */ 666 FALSE), /* pcrel_offset */ 667 668 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for 669 the symbol. */ 670 HOWTO (R_PPC_PLT16_HI, /* type */ 671 16, /* rightshift */ 672 1, /* size (0 = byte, 1 = short, 2 = long) */ 673 16, /* bitsize */ 674 FALSE, /* pc_relative */ 675 0, /* bitpos */ 676 complain_overflow_bitfield, /* complain_on_overflow */ 677 bfd_elf_generic_reloc, /* special_function */ 678 "R_PPC_PLT16_HI", /* name */ 679 FALSE, /* partial_inplace */ 680 0, /* src_mask */ 681 0xffff, /* dst_mask */ 682 FALSE), /* pcrel_offset */ 683 684 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for 685 the symbol. */ 686 HOWTO (R_PPC_PLT16_HA, /* type */ 687 16, /* rightshift */ 688 1, /* size (0 = byte, 1 = short, 2 = long) */ 689 16, /* bitsize */ 690 FALSE, /* pc_relative */ 691 0, /* bitpos */ 692 complain_overflow_bitfield, /* complain_on_overflow */ 693 ppc_elf_addr16_ha_reloc, /* special_function */ 694 "R_PPC_PLT16_HA", /* name */ 695 FALSE, /* partial_inplace */ 696 0, /* src_mask */ 697 0xffff, /* dst_mask */ 698 FALSE), /* pcrel_offset */ 699 700 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with 701 small data items. */ 702 HOWTO (R_PPC_SDAREL16, /* type */ 703 0, /* rightshift */ 704 1, /* size (0 = byte, 1 = short, 2 = long) */ 705 16, /* bitsize */ 706 FALSE, /* pc_relative */ 707 0, /* bitpos */ 708 complain_overflow_signed, /* complain_on_overflow */ 709 bfd_elf_generic_reloc, /* special_function */ 710 "R_PPC_SDAREL16", /* name */ 711 FALSE, /* partial_inplace */ 712 0, /* src_mask */ 713 0xffff, /* dst_mask */ 714 FALSE), /* pcrel_offset */ 715 716 /* 16-bit section relative relocation. */ 717 HOWTO (R_PPC_SECTOFF, /* type */ 718 0, /* rightshift */ 719 1, /* size (0 = byte, 1 = short, 2 = long) */ 720 16, /* bitsize */ 721 FALSE, /* pc_relative */ 722 0, /* bitpos */ 723 complain_overflow_bitfield, /* complain_on_overflow */ 724 bfd_elf_generic_reloc, /* special_function */ 725 "R_PPC_SECTOFF", /* name */ 726 FALSE, /* partial_inplace */ 727 0, /* src_mask */ 728 0xffff, /* dst_mask */ 729 FALSE), /* pcrel_offset */ 730 731 /* 16-bit lower half section relative relocation. */ 732 HOWTO (R_PPC_SECTOFF_LO, /* type */ 733 0, /* rightshift */ 734 1, /* size (0 = byte, 1 = short, 2 = long) */ 735 16, /* bitsize */ 736 FALSE, /* pc_relative */ 737 0, /* bitpos */ 738 complain_overflow_dont, /* complain_on_overflow */ 739 bfd_elf_generic_reloc, /* special_function */ 740 "R_PPC_SECTOFF_LO", /* name */ 741 FALSE, /* partial_inplace */ 742 0, /* src_mask */ 743 0xffff, /* dst_mask */ 744 FALSE), /* pcrel_offset */ 745 746 /* 16-bit upper half section relative relocation. */ 747 HOWTO (R_PPC_SECTOFF_HI, /* type */ 748 16, /* rightshift */ 749 1, /* size (0 = byte, 1 = short, 2 = long) */ 750 16, /* bitsize */ 751 FALSE, /* pc_relative */ 752 0, /* bitpos */ 753 complain_overflow_bitfield, /* complain_on_overflow */ 754 bfd_elf_generic_reloc, /* special_function */ 755 "R_PPC_SECTOFF_HI", /* name */ 756 FALSE, /* partial_inplace */ 757 0, /* src_mask */ 758 0xffff, /* dst_mask */ 759 FALSE), /* pcrel_offset */ 760 761 /* 16-bit upper half adjusted section relative relocation. */ 762 HOWTO (R_PPC_SECTOFF_HA, /* type */ 763 16, /* rightshift */ 764 1, /* size (0 = byte, 1 = short, 2 = long) */ 765 16, /* bitsize */ 766 FALSE, /* pc_relative */ 767 0, /* bitpos */ 768 complain_overflow_bitfield, /* complain_on_overflow */ 769 ppc_elf_addr16_ha_reloc, /* special_function */ 770 "R_PPC_SECTOFF_HA", /* name */ 771 FALSE, /* partial_inplace */ 772 0, /* src_mask */ 773 0xffff, /* dst_mask */ 774 FALSE), /* pcrel_offset */ 775 776 /* Marker relocs for TLS. */ 777 HOWTO (R_PPC_TLS, 778 0, /* rightshift */ 779 2, /* size (0 = byte, 1 = short, 2 = long) */ 780 32, /* bitsize */ 781 FALSE, /* pc_relative */ 782 0, /* bitpos */ 783 complain_overflow_dont, /* complain_on_overflow */ 784 bfd_elf_generic_reloc, /* special_function */ 785 "R_PPC_TLS", /* name */ 786 FALSE, /* partial_inplace */ 787 0, /* src_mask */ 788 0, /* dst_mask */ 789 FALSE), /* pcrel_offset */ 790 791 HOWTO (R_PPC_TLSGD, 792 0, /* rightshift */ 793 2, /* size (0 = byte, 1 = short, 2 = long) */ 794 32, /* bitsize */ 795 FALSE, /* pc_relative */ 796 0, /* bitpos */ 797 complain_overflow_dont, /* complain_on_overflow */ 798 bfd_elf_generic_reloc, /* special_function */ 799 "R_PPC_TLSGD", /* name */ 800 FALSE, /* partial_inplace */ 801 0, /* src_mask */ 802 0, /* dst_mask */ 803 FALSE), /* pcrel_offset */ 804 805 HOWTO (R_PPC_TLSLD, 806 0, /* rightshift */ 807 2, /* size (0 = byte, 1 = short, 2 = long) */ 808 32, /* bitsize */ 809 FALSE, /* pc_relative */ 810 0, /* bitpos */ 811 complain_overflow_dont, /* complain_on_overflow */ 812 bfd_elf_generic_reloc, /* special_function */ 813 "R_PPC_TLSLD", /* name */ 814 FALSE, /* partial_inplace */ 815 0, /* src_mask */ 816 0, /* dst_mask */ 817 FALSE), /* pcrel_offset */ 818 819 /* Computes the load module index of the load module that contains the 820 definition of its TLS sym. */ 821 HOWTO (R_PPC_DTPMOD32, 822 0, /* rightshift */ 823 2, /* size (0 = byte, 1 = short, 2 = long) */ 824 32, /* bitsize */ 825 FALSE, /* pc_relative */ 826 0, /* bitpos */ 827 complain_overflow_dont, /* complain_on_overflow */ 828 ppc_elf_unhandled_reloc, /* special_function */ 829 "R_PPC_DTPMOD32", /* name */ 830 FALSE, /* partial_inplace */ 831 0, /* src_mask */ 832 0xffffffff, /* dst_mask */ 833 FALSE), /* pcrel_offset */ 834 835 /* Computes a dtv-relative displacement, the difference between the value 836 of sym+add and the base address of the thread-local storage block that 837 contains the definition of sym, minus 0x8000. */ 838 HOWTO (R_PPC_DTPREL32, 839 0, /* rightshift */ 840 2, /* size (0 = byte, 1 = short, 2 = long) */ 841 32, /* bitsize */ 842 FALSE, /* pc_relative */ 843 0, /* bitpos */ 844 complain_overflow_dont, /* complain_on_overflow */ 845 ppc_elf_unhandled_reloc, /* special_function */ 846 "R_PPC_DTPREL32", /* name */ 847 FALSE, /* partial_inplace */ 848 0, /* src_mask */ 849 0xffffffff, /* dst_mask */ 850 FALSE), /* pcrel_offset */ 851 852 /* A 16 bit dtprel reloc. */ 853 HOWTO (R_PPC_DTPREL16, 854 0, /* rightshift */ 855 1, /* size (0 = byte, 1 = short, 2 = long) */ 856 16, /* bitsize */ 857 FALSE, /* pc_relative */ 858 0, /* bitpos */ 859 complain_overflow_signed, /* complain_on_overflow */ 860 ppc_elf_unhandled_reloc, /* special_function */ 861 "R_PPC_DTPREL16", /* name */ 862 FALSE, /* partial_inplace */ 863 0, /* src_mask */ 864 0xffff, /* dst_mask */ 865 FALSE), /* pcrel_offset */ 866 867 /* Like DTPREL16, but no overflow. */ 868 HOWTO (R_PPC_DTPREL16_LO, 869 0, /* rightshift */ 870 1, /* size (0 = byte, 1 = short, 2 = long) */ 871 16, /* bitsize */ 872 FALSE, /* pc_relative */ 873 0, /* bitpos */ 874 complain_overflow_dont, /* complain_on_overflow */ 875 ppc_elf_unhandled_reloc, /* special_function */ 876 "R_PPC_DTPREL16_LO", /* name */ 877 FALSE, /* partial_inplace */ 878 0, /* src_mask */ 879 0xffff, /* dst_mask */ 880 FALSE), /* pcrel_offset */ 881 882 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 883 HOWTO (R_PPC_DTPREL16_HI, 884 16, /* rightshift */ 885 1, /* size (0 = byte, 1 = short, 2 = long) */ 886 16, /* bitsize */ 887 FALSE, /* pc_relative */ 888 0, /* bitpos */ 889 complain_overflow_dont, /* complain_on_overflow */ 890 ppc_elf_unhandled_reloc, /* special_function */ 891 "R_PPC_DTPREL16_HI", /* name */ 892 FALSE, /* partial_inplace */ 893 0, /* src_mask */ 894 0xffff, /* dst_mask */ 895 FALSE), /* pcrel_offset */ 896 897 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 898 HOWTO (R_PPC_DTPREL16_HA, 899 16, /* rightshift */ 900 1, /* size (0 = byte, 1 = short, 2 = long) */ 901 16, /* bitsize */ 902 FALSE, /* pc_relative */ 903 0, /* bitpos */ 904 complain_overflow_dont, /* complain_on_overflow */ 905 ppc_elf_unhandled_reloc, /* special_function */ 906 "R_PPC_DTPREL16_HA", /* name */ 907 FALSE, /* partial_inplace */ 908 0, /* src_mask */ 909 0xffff, /* dst_mask */ 910 FALSE), /* pcrel_offset */ 911 912 /* Computes a tp-relative displacement, the difference between the value of 913 sym+add and the value of the thread pointer (r13). */ 914 HOWTO (R_PPC_TPREL32, 915 0, /* rightshift */ 916 2, /* size (0 = byte, 1 = short, 2 = long) */ 917 32, /* bitsize */ 918 FALSE, /* pc_relative */ 919 0, /* bitpos */ 920 complain_overflow_dont, /* complain_on_overflow */ 921 ppc_elf_unhandled_reloc, /* special_function */ 922 "R_PPC_TPREL32", /* name */ 923 FALSE, /* partial_inplace */ 924 0, /* src_mask */ 925 0xffffffff, /* dst_mask */ 926 FALSE), /* pcrel_offset */ 927 928 /* A 16 bit tprel reloc. */ 929 HOWTO (R_PPC_TPREL16, 930 0, /* rightshift */ 931 1, /* size (0 = byte, 1 = short, 2 = long) */ 932 16, /* bitsize */ 933 FALSE, /* pc_relative */ 934 0, /* bitpos */ 935 complain_overflow_signed, /* complain_on_overflow */ 936 ppc_elf_unhandled_reloc, /* special_function */ 937 "R_PPC_TPREL16", /* name */ 938 FALSE, /* partial_inplace */ 939 0, /* src_mask */ 940 0xffff, /* dst_mask */ 941 FALSE), /* pcrel_offset */ 942 943 /* Like TPREL16, but no overflow. */ 944 HOWTO (R_PPC_TPREL16_LO, 945 0, /* rightshift */ 946 1, /* size (0 = byte, 1 = short, 2 = long) */ 947 16, /* bitsize */ 948 FALSE, /* pc_relative */ 949 0, /* bitpos */ 950 complain_overflow_dont, /* complain_on_overflow */ 951 ppc_elf_unhandled_reloc, /* special_function */ 952 "R_PPC_TPREL16_LO", /* name */ 953 FALSE, /* partial_inplace */ 954 0, /* src_mask */ 955 0xffff, /* dst_mask */ 956 FALSE), /* pcrel_offset */ 957 958 /* Like TPREL16_LO, but next higher group of 16 bits. */ 959 HOWTO (R_PPC_TPREL16_HI, 960 16, /* rightshift */ 961 1, /* size (0 = byte, 1 = short, 2 = long) */ 962 16, /* bitsize */ 963 FALSE, /* pc_relative */ 964 0, /* bitpos */ 965 complain_overflow_dont, /* complain_on_overflow */ 966 ppc_elf_unhandled_reloc, /* special_function */ 967 "R_PPC_TPREL16_HI", /* name */ 968 FALSE, /* partial_inplace */ 969 0, /* src_mask */ 970 0xffff, /* dst_mask */ 971 FALSE), /* pcrel_offset */ 972 973 /* Like TPREL16_HI, but adjust for low 16 bits. */ 974 HOWTO (R_PPC_TPREL16_HA, 975 16, /* rightshift */ 976 1, /* size (0 = byte, 1 = short, 2 = long) */ 977 16, /* bitsize */ 978 FALSE, /* pc_relative */ 979 0, /* bitpos */ 980 complain_overflow_dont, /* complain_on_overflow */ 981 ppc_elf_unhandled_reloc, /* special_function */ 982 "R_PPC_TPREL16_HA", /* name */ 983 FALSE, /* partial_inplace */ 984 0, /* src_mask */ 985 0xffff, /* dst_mask */ 986 FALSE), /* pcrel_offset */ 987 988 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 989 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 990 to the first entry. */ 991 HOWTO (R_PPC_GOT_TLSGD16, 992 0, /* rightshift */ 993 1, /* size (0 = byte, 1 = short, 2 = long) */ 994 16, /* bitsize */ 995 FALSE, /* pc_relative */ 996 0, /* bitpos */ 997 complain_overflow_signed, /* complain_on_overflow */ 998 ppc_elf_unhandled_reloc, /* special_function */ 999 "R_PPC_GOT_TLSGD16", /* name */ 1000 FALSE, /* partial_inplace */ 1001 0, /* src_mask */ 1002 0xffff, /* dst_mask */ 1003 FALSE), /* pcrel_offset */ 1004 1005 /* Like GOT_TLSGD16, but no overflow. */ 1006 HOWTO (R_PPC_GOT_TLSGD16_LO, 1007 0, /* rightshift */ 1008 1, /* size (0 = byte, 1 = short, 2 = long) */ 1009 16, /* bitsize */ 1010 FALSE, /* pc_relative */ 1011 0, /* bitpos */ 1012 complain_overflow_dont, /* complain_on_overflow */ 1013 ppc_elf_unhandled_reloc, /* special_function */ 1014 "R_PPC_GOT_TLSGD16_LO", /* name */ 1015 FALSE, /* partial_inplace */ 1016 0, /* src_mask */ 1017 0xffff, /* dst_mask */ 1018 FALSE), /* pcrel_offset */ 1019 1020 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 1021 HOWTO (R_PPC_GOT_TLSGD16_HI, 1022 16, /* rightshift */ 1023 1, /* size (0 = byte, 1 = short, 2 = long) */ 1024 16, /* bitsize */ 1025 FALSE, /* pc_relative */ 1026 0, /* bitpos */ 1027 complain_overflow_dont, /* complain_on_overflow */ 1028 ppc_elf_unhandled_reloc, /* special_function */ 1029 "R_PPC_GOT_TLSGD16_HI", /* name */ 1030 FALSE, /* partial_inplace */ 1031 0, /* src_mask */ 1032 0xffff, /* dst_mask */ 1033 FALSE), /* pcrel_offset */ 1034 1035 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 1036 HOWTO (R_PPC_GOT_TLSGD16_HA, 1037 16, /* rightshift */ 1038 1, /* size (0 = byte, 1 = short, 2 = long) */ 1039 16, /* bitsize */ 1040 FALSE, /* pc_relative */ 1041 0, /* bitpos */ 1042 complain_overflow_dont, /* complain_on_overflow */ 1043 ppc_elf_unhandled_reloc, /* special_function */ 1044 "R_PPC_GOT_TLSGD16_HA", /* name */ 1045 FALSE, /* partial_inplace */ 1046 0, /* src_mask */ 1047 0xffff, /* dst_mask */ 1048 FALSE), /* pcrel_offset */ 1049 1050 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1051 with values (sym+add)@dtpmod and zero, and computes the offset to the 1052 first entry. */ 1053 HOWTO (R_PPC_GOT_TLSLD16, 1054 0, /* rightshift */ 1055 1, /* size (0 = byte, 1 = short, 2 = long) */ 1056 16, /* bitsize */ 1057 FALSE, /* pc_relative */ 1058 0, /* bitpos */ 1059 complain_overflow_signed, /* complain_on_overflow */ 1060 ppc_elf_unhandled_reloc, /* special_function */ 1061 "R_PPC_GOT_TLSLD16", /* name */ 1062 FALSE, /* partial_inplace */ 1063 0, /* src_mask */ 1064 0xffff, /* dst_mask */ 1065 FALSE), /* pcrel_offset */ 1066 1067 /* Like GOT_TLSLD16, but no overflow. */ 1068 HOWTO (R_PPC_GOT_TLSLD16_LO, 1069 0, /* rightshift */ 1070 1, /* size (0 = byte, 1 = short, 2 = long) */ 1071 16, /* bitsize */ 1072 FALSE, /* pc_relative */ 1073 0, /* bitpos */ 1074 complain_overflow_dont, /* complain_on_overflow */ 1075 ppc_elf_unhandled_reloc, /* special_function */ 1076 "R_PPC_GOT_TLSLD16_LO", /* name */ 1077 FALSE, /* partial_inplace */ 1078 0, /* src_mask */ 1079 0xffff, /* dst_mask */ 1080 FALSE), /* pcrel_offset */ 1081 1082 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1083 HOWTO (R_PPC_GOT_TLSLD16_HI, 1084 16, /* rightshift */ 1085 1, /* size (0 = byte, 1 = short, 2 = long) */ 1086 16, /* bitsize */ 1087 FALSE, /* pc_relative */ 1088 0, /* bitpos */ 1089 complain_overflow_dont, /* complain_on_overflow */ 1090 ppc_elf_unhandled_reloc, /* special_function */ 1091 "R_PPC_GOT_TLSLD16_HI", /* name */ 1092 FALSE, /* partial_inplace */ 1093 0, /* src_mask */ 1094 0xffff, /* dst_mask */ 1095 FALSE), /* pcrel_offset */ 1096 1097 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1098 HOWTO (R_PPC_GOT_TLSLD16_HA, 1099 16, /* rightshift */ 1100 1, /* size (0 = byte, 1 = short, 2 = long) */ 1101 16, /* bitsize */ 1102 FALSE, /* pc_relative */ 1103 0, /* bitpos */ 1104 complain_overflow_dont, /* complain_on_overflow */ 1105 ppc_elf_unhandled_reloc, /* special_function */ 1106 "R_PPC_GOT_TLSLD16_HA", /* name */ 1107 FALSE, /* partial_inplace */ 1108 0, /* src_mask */ 1109 0xffff, /* dst_mask */ 1110 FALSE), /* pcrel_offset */ 1111 1112 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1113 the offset to the entry. */ 1114 HOWTO (R_PPC_GOT_DTPREL16, 1115 0, /* rightshift */ 1116 1, /* size (0 = byte, 1 = short, 2 = long) */ 1117 16, /* bitsize */ 1118 FALSE, /* pc_relative */ 1119 0, /* bitpos */ 1120 complain_overflow_signed, /* complain_on_overflow */ 1121 ppc_elf_unhandled_reloc, /* special_function */ 1122 "R_PPC_GOT_DTPREL16", /* name */ 1123 FALSE, /* partial_inplace */ 1124 0, /* src_mask */ 1125 0xffff, /* dst_mask */ 1126 FALSE), /* pcrel_offset */ 1127 1128 /* Like GOT_DTPREL16, but no overflow. */ 1129 HOWTO (R_PPC_GOT_DTPREL16_LO, 1130 0, /* rightshift */ 1131 1, /* size (0 = byte, 1 = short, 2 = long) */ 1132 16, /* bitsize */ 1133 FALSE, /* pc_relative */ 1134 0, /* bitpos */ 1135 complain_overflow_dont, /* complain_on_overflow */ 1136 ppc_elf_unhandled_reloc, /* special_function */ 1137 "R_PPC_GOT_DTPREL16_LO", /* name */ 1138 FALSE, /* partial_inplace */ 1139 0, /* src_mask */ 1140 0xffff, /* dst_mask */ 1141 FALSE), /* pcrel_offset */ 1142 1143 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ 1144 HOWTO (R_PPC_GOT_DTPREL16_HI, 1145 16, /* rightshift */ 1146 1, /* size (0 = byte, 1 = short, 2 = long) */ 1147 16, /* bitsize */ 1148 FALSE, /* pc_relative */ 1149 0, /* bitpos */ 1150 complain_overflow_dont, /* complain_on_overflow */ 1151 ppc_elf_unhandled_reloc, /* special_function */ 1152 "R_PPC_GOT_DTPREL16_HI", /* name */ 1153 FALSE, /* partial_inplace */ 1154 0, /* src_mask */ 1155 0xffff, /* dst_mask */ 1156 FALSE), /* pcrel_offset */ 1157 1158 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1159 HOWTO (R_PPC_GOT_DTPREL16_HA, 1160 16, /* rightshift */ 1161 1, /* size (0 = byte, 1 = short, 2 = long) */ 1162 16, /* bitsize */ 1163 FALSE, /* pc_relative */ 1164 0, /* bitpos */ 1165 complain_overflow_dont, /* complain_on_overflow */ 1166 ppc_elf_unhandled_reloc, /* special_function */ 1167 "R_PPC_GOT_DTPREL16_HA", /* name */ 1168 FALSE, /* partial_inplace */ 1169 0, /* src_mask */ 1170 0xffff, /* dst_mask */ 1171 FALSE), /* pcrel_offset */ 1172 1173 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1174 offset to the entry. */ 1175 HOWTO (R_PPC_GOT_TPREL16, 1176 0, /* rightshift */ 1177 1, /* size (0 = byte, 1 = short, 2 = long) */ 1178 16, /* bitsize */ 1179 FALSE, /* pc_relative */ 1180 0, /* bitpos */ 1181 complain_overflow_signed, /* complain_on_overflow */ 1182 ppc_elf_unhandled_reloc, /* special_function */ 1183 "R_PPC_GOT_TPREL16", /* name */ 1184 FALSE, /* partial_inplace */ 1185 0, /* src_mask */ 1186 0xffff, /* dst_mask */ 1187 FALSE), /* pcrel_offset */ 1188 1189 /* Like GOT_TPREL16, but no overflow. */ 1190 HOWTO (R_PPC_GOT_TPREL16_LO, 1191 0, /* rightshift */ 1192 1, /* size (0 = byte, 1 = short, 2 = long) */ 1193 16, /* bitsize */ 1194 FALSE, /* pc_relative */ 1195 0, /* bitpos */ 1196 complain_overflow_dont, /* complain_on_overflow */ 1197 ppc_elf_unhandled_reloc, /* special_function */ 1198 "R_PPC_GOT_TPREL16_LO", /* name */ 1199 FALSE, /* partial_inplace */ 1200 0, /* src_mask */ 1201 0xffff, /* dst_mask */ 1202 FALSE), /* pcrel_offset */ 1203 1204 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ 1205 HOWTO (R_PPC_GOT_TPREL16_HI, 1206 16, /* rightshift */ 1207 1, /* size (0 = byte, 1 = short, 2 = long) */ 1208 16, /* bitsize */ 1209 FALSE, /* pc_relative */ 1210 0, /* bitpos */ 1211 complain_overflow_dont, /* complain_on_overflow */ 1212 ppc_elf_unhandled_reloc, /* special_function */ 1213 "R_PPC_GOT_TPREL16_HI", /* name */ 1214 FALSE, /* partial_inplace */ 1215 0, /* src_mask */ 1216 0xffff, /* dst_mask */ 1217 FALSE), /* pcrel_offset */ 1218 1219 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1220 HOWTO (R_PPC_GOT_TPREL16_HA, 1221 16, /* rightshift */ 1222 1, /* size (0 = byte, 1 = short, 2 = long) */ 1223 16, /* bitsize */ 1224 FALSE, /* pc_relative */ 1225 0, /* bitpos */ 1226 complain_overflow_dont, /* complain_on_overflow */ 1227 ppc_elf_unhandled_reloc, /* special_function */ 1228 "R_PPC_GOT_TPREL16_HA", /* name */ 1229 FALSE, /* partial_inplace */ 1230 0, /* src_mask */ 1231 0xffff, /* dst_mask */ 1232 FALSE), /* pcrel_offset */ 1233 1234 /* The remaining relocs are from the Embedded ELF ABI, and are not 1235 in the SVR4 ELF ABI. */ 1236 1237 /* 32 bit value resulting from the addend minus the symbol. */ 1238 HOWTO (R_PPC_EMB_NADDR32, /* type */ 1239 0, /* rightshift */ 1240 2, /* size (0 = byte, 1 = short, 2 = long) */ 1241 32, /* bitsize */ 1242 FALSE, /* pc_relative */ 1243 0, /* bitpos */ 1244 complain_overflow_bitfield, /* complain_on_overflow */ 1245 bfd_elf_generic_reloc, /* special_function */ 1246 "R_PPC_EMB_NADDR32", /* name */ 1247 FALSE, /* partial_inplace */ 1248 0, /* src_mask */ 1249 0xffffffff, /* dst_mask */ 1250 FALSE), /* pcrel_offset */ 1251 1252 /* 16 bit value resulting from the addend minus the symbol. */ 1253 HOWTO (R_PPC_EMB_NADDR16, /* type */ 1254 0, /* rightshift */ 1255 1, /* size (0 = byte, 1 = short, 2 = long) */ 1256 16, /* bitsize */ 1257 FALSE, /* pc_relative */ 1258 0, /* bitpos */ 1259 complain_overflow_bitfield, /* complain_on_overflow */ 1260 bfd_elf_generic_reloc, /* special_function */ 1261 "R_PPC_EMB_NADDR16", /* name */ 1262 FALSE, /* partial_inplace */ 1263 0, /* src_mask */ 1264 0xffff, /* dst_mask */ 1265 FALSE), /* pcrel_offset */ 1266 1267 /* 16 bit value resulting from the addend minus the symbol. */ 1268 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ 1269 0, /* rightshift */ 1270 1, /* size (0 = byte, 1 = short, 2 = long) */ 1271 16, /* bitsize */ 1272 FALSE, /* pc_relative */ 1273 0, /* bitpos */ 1274 complain_overflow_dont,/* complain_on_overflow */ 1275 bfd_elf_generic_reloc, /* special_function */ 1276 "R_PPC_EMB_ADDR16_LO", /* name */ 1277 FALSE, /* partial_inplace */ 1278 0, /* src_mask */ 1279 0xffff, /* dst_mask */ 1280 FALSE), /* pcrel_offset */ 1281 1282 /* The high order 16 bits of the addend minus the symbol. */ 1283 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ 1284 16, /* rightshift */ 1285 1, /* size (0 = byte, 1 = short, 2 = long) */ 1286 16, /* bitsize */ 1287 FALSE, /* pc_relative */ 1288 0, /* bitpos */ 1289 complain_overflow_dont, /* complain_on_overflow */ 1290 bfd_elf_generic_reloc, /* special_function */ 1291 "R_PPC_EMB_NADDR16_HI", /* name */ 1292 FALSE, /* partial_inplace */ 1293 0, /* src_mask */ 1294 0xffff, /* dst_mask */ 1295 FALSE), /* pcrel_offset */ 1296 1297 /* The high order 16 bits of the result of the addend minus the address, 1298 plus 1 if the contents of the low 16 bits, treated as a signed number, 1299 is negative. */ 1300 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ 1301 16, /* rightshift */ 1302 1, /* size (0 = byte, 1 = short, 2 = long) */ 1303 16, /* bitsize */ 1304 FALSE, /* pc_relative */ 1305 0, /* bitpos */ 1306 complain_overflow_dont, /* complain_on_overflow */ 1307 ppc_elf_addr16_ha_reloc, /* special_function */ 1308 "R_PPC_EMB_NADDR16_HA", /* name */ 1309 FALSE, /* partial_inplace */ 1310 0, /* src_mask */ 1311 0xffff, /* dst_mask */ 1312 FALSE), /* pcrel_offset */ 1313 1314 /* 16 bit value resulting from allocating a 4 byte word to hold an 1315 address in the .sdata section, and returning the offset from 1316 _SDA_BASE_ for that relocation. */ 1317 HOWTO (R_PPC_EMB_SDAI16, /* type */ 1318 0, /* rightshift */ 1319 1, /* size (0 = byte, 1 = short, 2 = long) */ 1320 16, /* bitsize */ 1321 FALSE, /* pc_relative */ 1322 0, /* bitpos */ 1323 complain_overflow_signed, /* complain_on_overflow */ 1324 bfd_elf_generic_reloc, /* special_function */ 1325 "R_PPC_EMB_SDAI16", /* name */ 1326 FALSE, /* partial_inplace */ 1327 0, /* src_mask */ 1328 0xffff, /* dst_mask */ 1329 FALSE), /* pcrel_offset */ 1330 1331 /* 16 bit value resulting from allocating a 4 byte word to hold an 1332 address in the .sdata2 section, and returning the offset from 1333 _SDA2_BASE_ for that relocation. */ 1334 HOWTO (R_PPC_EMB_SDA2I16, /* type */ 1335 0, /* rightshift */ 1336 1, /* size (0 = byte, 1 = short, 2 = long) */ 1337 16, /* bitsize */ 1338 FALSE, /* pc_relative */ 1339 0, /* bitpos */ 1340 complain_overflow_signed, /* complain_on_overflow */ 1341 bfd_elf_generic_reloc, /* special_function */ 1342 "R_PPC_EMB_SDA2I16", /* name */ 1343 FALSE, /* partial_inplace */ 1344 0, /* src_mask */ 1345 0xffff, /* dst_mask */ 1346 FALSE), /* pcrel_offset */ 1347 1348 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with 1349 small data items. */ 1350 HOWTO (R_PPC_EMB_SDA2REL, /* type */ 1351 0, /* rightshift */ 1352 1, /* size (0 = byte, 1 = short, 2 = long) */ 1353 16, /* bitsize */ 1354 FALSE, /* pc_relative */ 1355 0, /* bitpos */ 1356 complain_overflow_signed, /* complain_on_overflow */ 1357 bfd_elf_generic_reloc, /* special_function */ 1358 "R_PPC_EMB_SDA2REL", /* name */ 1359 FALSE, /* partial_inplace */ 1360 0, /* src_mask */ 1361 0xffff, /* dst_mask */ 1362 FALSE), /* pcrel_offset */ 1363 1364 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit 1365 signed offset from the appropriate base, and filling in the register 1366 field with the appropriate register (0, 2, or 13). */ 1367 HOWTO (R_PPC_EMB_SDA21, /* type */ 1368 0, /* rightshift */ 1369 2, /* size (0 = byte, 1 = short, 2 = long) */ 1370 16, /* bitsize */ 1371 FALSE, /* pc_relative */ 1372 0, /* bitpos */ 1373 complain_overflow_signed, /* complain_on_overflow */ 1374 bfd_elf_generic_reloc, /* special_function */ 1375 "R_PPC_EMB_SDA21", /* name */ 1376 FALSE, /* partial_inplace */ 1377 0, /* src_mask */ 1378 0xffff, /* dst_mask */ 1379 FALSE), /* pcrel_offset */ 1380 1381 /* Relocation not handled: R_PPC_EMB_MRKREF */ 1382 /* Relocation not handled: R_PPC_EMB_RELSEC16 */ 1383 /* Relocation not handled: R_PPC_EMB_RELST_LO */ 1384 /* Relocation not handled: R_PPC_EMB_RELST_HI */ 1385 /* Relocation not handled: R_PPC_EMB_RELST_HA */ 1386 /* Relocation not handled: R_PPC_EMB_BIT_FLD */ 1387 1388 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling 1389 in the 16 bit signed offset from the appropriate base, and filling in the 1390 register field with the appropriate register (0, 2, or 13). */ 1391 HOWTO (R_PPC_EMB_RELSDA, /* type */ 1392 0, /* rightshift */ 1393 1, /* size (0 = byte, 1 = short, 2 = long) */ 1394 16, /* bitsize */ 1395 FALSE, /* pc_relative */ 1396 0, /* bitpos */ 1397 complain_overflow_signed, /* complain_on_overflow */ 1398 bfd_elf_generic_reloc, /* special_function */ 1399 "R_PPC_EMB_RELSDA", /* name */ 1400 FALSE, /* partial_inplace */ 1401 0, /* src_mask */ 1402 0xffff, /* dst_mask */ 1403 FALSE), /* pcrel_offset */ 1404 1405 /* A relative 8 bit branch. */ 1406 HOWTO (R_PPC_VLE_REL8, /* type */ 1407 1, /* rightshift */ 1408 1, /* size (0 = byte, 1 = short, 2 = long) */ 1409 8, /* bitsize */ 1410 TRUE, /* pc_relative */ 1411 0, /* bitpos */ 1412 complain_overflow_signed, /* complain_on_overflow */ 1413 bfd_elf_generic_reloc, /* special_function */ 1414 "R_PPC_VLE_REL8", /* name */ 1415 FALSE, /* partial_inplace */ 1416 0, /* src_mask */ 1417 0xff, /* dst_mask */ 1418 TRUE), /* pcrel_offset */ 1419 1420 /* A relative 15 bit branch. */ 1421 HOWTO (R_PPC_VLE_REL15, /* type */ 1422 1, /* rightshift */ 1423 2, /* size (0 = byte, 1 = short, 2 = long) */ 1424 15, /* bitsize */ 1425 TRUE, /* pc_relative */ 1426 1, /* bitpos */ 1427 complain_overflow_signed, /* complain_on_overflow */ 1428 bfd_elf_generic_reloc, /* special_function */ 1429 "R_PPC_VLE_REL15", /* name */ 1430 FALSE, /* partial_inplace */ 1431 0, /* src_mask */ 1432 0xfe, /* dst_mask */ 1433 TRUE), /* pcrel_offset */ 1434 1435 /* A relative 24 bit branch. */ 1436 HOWTO (R_PPC_VLE_REL24, /* type */ 1437 1, /* rightshift */ 1438 2, /* size (0 = byte, 1 = short, 2 = long) */ 1439 24, /* bitsize */ 1440 TRUE, /* pc_relative */ 1441 1, /* bitpos */ 1442 complain_overflow_signed, /* complain_on_overflow */ 1443 bfd_elf_generic_reloc, /* special_function */ 1444 "R_PPC_VLE_REL24", /* name */ 1445 FALSE, /* partial_inplace */ 1446 0, /* src_mask */ 1447 0x1fffffe, /* dst_mask */ 1448 TRUE), /* pcrel_offset */ 1449 1450 /* The 16 LSBS in split16a format. */ 1451 HOWTO (R_PPC_VLE_LO16A, /* type */ 1452 0, /* rightshift */ 1453 2, /* size (0 = byte, 1 = short, 2 = long) */ 1454 32, /* bitsize */ 1455 FALSE, /* pc_relative */ 1456 0, /* bitpos */ 1457 complain_overflow_bitfield, /* complain_on_overflow */ 1458 bfd_elf_generic_reloc, /* special_function */ 1459 "R_PPC_VLE_LO16A", /* name */ 1460 FALSE, /* partial_inplace */ 1461 0, /* src_mask */ 1462 0x1f007ff, /* dst_mask */ 1463 FALSE), /* pcrel_offset */ 1464 1465 /* The 16 LSBS in split16d format. */ 1466 HOWTO (R_PPC_VLE_LO16D, /* type */ 1467 0, /* rightshift */ 1468 2, /* size (0 = byte, 1 = short, 2 = long) */ 1469 32, /* bitsize */ 1470 FALSE, /* pc_relative */ 1471 0, /* bitpos */ 1472 complain_overflow_bitfield, /* complain_on_overflow */ 1473 bfd_elf_generic_reloc, /* special_function */ 1474 "R_PPC_VLE_LO16D", /* name */ 1475 FALSE, /* partial_inplace */ 1476 0, /* src_mask */ 1477 0x1f07ff, /* dst_mask */ 1478 FALSE), /* pcrel_offset */ 1479 1480 /* Bits 16-31 split16a format. */ 1481 HOWTO (R_PPC_VLE_HI16A, /* type */ 1482 0, /* rightshift */ 1483 2, /* size (0 = byte, 1 = short, 2 = long) */ 1484 32, /* bitsize */ 1485 FALSE, /* pc_relative */ 1486 0, /* bitpos */ 1487 complain_overflow_bitfield, /* complain_on_overflow */ 1488 bfd_elf_generic_reloc, /* special_function */ 1489 "R_PPC_VLE_HI16A", /* name */ 1490 FALSE, /* partial_inplace */ 1491 0, /* src_mask */ 1492 0x1f007ff, /* dst_mask */ 1493 FALSE), /* pcrel_offset */ 1494 1495 /* Bits 16-31 split16d format. */ 1496 HOWTO (R_PPC_VLE_HI16D, /* type */ 1497 0, /* rightshift */ 1498 2, /* size (0 = byte, 1 = short, 2 = long) */ 1499 32, /* bitsize */ 1500 FALSE, /* pc_relative */ 1501 0, /* bitpos */ 1502 complain_overflow_bitfield, /* complain_on_overflow */ 1503 bfd_elf_generic_reloc, /* special_function */ 1504 "R_PPC_VLE_HI16D", /* name */ 1505 FALSE, /* partial_inplace */ 1506 0, /* src_mask */ 1507 0x1f07ff, /* dst_mask */ 1508 FALSE), /* pcrel_offset */ 1509 1510 /* Bits 16-31 (High Adjusted) in split16a format. */ 1511 HOWTO (R_PPC_VLE_HA16A, /* type */ 1512 0, /* rightshift */ 1513 2, /* size (0 = byte, 1 = short, 2 = long) */ 1514 32, /* bitsize */ 1515 FALSE, /* pc_relative */ 1516 0, /* bitpos */ 1517 complain_overflow_bitfield, /* complain_on_overflow */ 1518 bfd_elf_generic_reloc, /* special_function */ 1519 "R_PPC_VLE_HA16A", /* name */ 1520 FALSE, /* partial_inplace */ 1521 0, /* src_mask */ 1522 0x1f007ff, /* dst_mask */ 1523 FALSE), /* pcrel_offset */ 1524 1525 /* Bits 16-31 (High Adjusted) in split16d format. */ 1526 HOWTO (R_PPC_VLE_HA16D, /* type */ 1527 0, /* rightshift */ 1528 2, /* size (0 = byte, 1 = short, 2 = long) */ 1529 32, /* bitsize */ 1530 FALSE, /* pc_relative */ 1531 0, /* bitpos */ 1532 complain_overflow_bitfield, /* complain_on_overflow */ 1533 bfd_elf_generic_reloc, /* special_function */ 1534 "R_PPC_VLE_HA16D", /* name */ 1535 FALSE, /* partial_inplace */ 1536 0, /* src_mask */ 1537 0x1f07ff, /* dst_mask */ 1538 FALSE), /* pcrel_offset */ 1539 1540 /* This reloc does nothing. */ 1541 HOWTO (R_PPC_VLE_SDA21, /* type */ 1542 0, /* rightshift */ 1543 2, /* size (0 = byte, 1 = short, 2 = long) */ 1544 32, /* bitsize */ 1545 FALSE, /* pc_relative */ 1546 0, /* bitpos */ 1547 complain_overflow_bitfield, /* complain_on_overflow */ 1548 bfd_elf_generic_reloc, /* special_function */ 1549 "R_PPC_VLE_SDA21", /* name */ 1550 FALSE, /* partial_inplace */ 1551 0, /* src_mask */ 1552 0xffff, /* dst_mask */ 1553 FALSE), /* pcrel_offset */ 1554 1555 /* This reloc does nothing. */ 1556 HOWTO (R_PPC_VLE_SDA21_LO, /* type */ 1557 0, /* rightshift */ 1558 2, /* size (0 = byte, 1 = short, 2 = long) */ 1559 32, /* bitsize */ 1560 FALSE, /* pc_relative */ 1561 0, /* bitpos */ 1562 complain_overflow_bitfield, /* complain_on_overflow */ 1563 bfd_elf_generic_reloc, /* special_function */ 1564 "R_PPC_VLE_SDA21_LO", /* name */ 1565 FALSE, /* partial_inplace */ 1566 0, /* src_mask */ 1567 0, /* dst_mask */ 1568 FALSE), /* pcrel_offset */ 1569 1570 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */ 1571 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */ 1572 0, /* rightshift */ 1573 2, /* size (0 = byte, 1 = short, 2 = long) */ 1574 32, /* bitsize */ 1575 FALSE, /* pc_relative */ 1576 0, /* bitpos */ 1577 complain_overflow_bitfield, /* complain_on_overflow */ 1578 bfd_elf_generic_reloc, /* special_function */ 1579 "R_PPC_VLE_SDAREL_LO16A", /* name */ 1580 FALSE, /* partial_inplace */ 1581 0, /* src_mask */ 1582 0x1f007ff, /* dst_mask */ 1583 FALSE), /* pcrel_offset */ 1584 1585 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */ 1586 /* This reloc does nothing. */ 1587 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */ 1588 0, /* rightshift */ 1589 2, /* size (0 = byte, 1 = short, 2 = long) */ 1590 32, /* bitsize */ 1591 FALSE, /* pc_relative */ 1592 0, /* bitpos */ 1593 complain_overflow_bitfield, /* complain_on_overflow */ 1594 bfd_elf_generic_reloc, /* special_function */ 1595 "R_PPC_VLE_SDAREL_LO16D", /* name */ 1596 FALSE, /* partial_inplace */ 1597 0, /* src_mask */ 1598 0x1f07ff, /* dst_mask */ 1599 FALSE), /* pcrel_offset */ 1600 1601 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */ 1602 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */ 1603 0, /* rightshift */ 1604 2, /* size (0 = byte, 1 = short, 2 = long) */ 1605 32, /* bitsize */ 1606 FALSE, /* pc_relative */ 1607 0, /* bitpos */ 1608 complain_overflow_bitfield, /* complain_on_overflow */ 1609 bfd_elf_generic_reloc, /* special_function */ 1610 "R_PPC_VLE_SDAREL_HI16A", /* name */ 1611 FALSE, /* partial_inplace */ 1612 0, /* src_mask */ 1613 0x1f007ff, /* dst_mask */ 1614 FALSE), /* pcrel_offset */ 1615 1616 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */ 1617 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */ 1618 0, /* rightshift */ 1619 2, /* size (0 = byte, 1 = short, 2 = long) */ 1620 32, /* bitsize */ 1621 FALSE, /* pc_relative */ 1622 0, /* bitpos */ 1623 complain_overflow_bitfield, /* complain_on_overflow */ 1624 bfd_elf_generic_reloc, /* special_function */ 1625 "R_PPC_VLE_SDAREL_HI16D", /* name */ 1626 FALSE, /* partial_inplace */ 1627 0, /* src_mask */ 1628 0x1f07ff, /* dst_mask */ 1629 FALSE), /* pcrel_offset */ 1630 1631 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */ 1632 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */ 1633 0, /* rightshift */ 1634 2, /* size (0 = byte, 1 = short, 2 = long) */ 1635 32, /* bitsize */ 1636 FALSE, /* pc_relative */ 1637 0, /* bitpos */ 1638 complain_overflow_bitfield, /* complain_on_overflow */ 1639 bfd_elf_generic_reloc, /* special_function */ 1640 "R_PPC_VLE_SDAREL_HA16A", /* name */ 1641 FALSE, /* partial_inplace */ 1642 0, /* src_mask */ 1643 0x1f007ff, /* dst_mask */ 1644 FALSE), /* pcrel_offset */ 1645 1646 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */ 1647 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */ 1648 0, /* rightshift */ 1649 2, /* size (0 = byte, 1 = short, 2 = long) */ 1650 32, /* bitsize */ 1651 FALSE, /* pc_relative */ 1652 0, /* bitpos */ 1653 complain_overflow_bitfield, /* complain_on_overflow */ 1654 bfd_elf_generic_reloc, /* special_function */ 1655 "R_PPC_VLE_SDAREL_HA16D", /* name */ 1656 FALSE, /* partial_inplace */ 1657 0, /* src_mask */ 1658 0x1f07ff, /* dst_mask */ 1659 FALSE), /* pcrel_offset */ 1660 1661 HOWTO (R_PPC_IRELATIVE, /* type */ 1662 0, /* rightshift */ 1663 2, /* size (0 = byte, 1 = short, 2 = long) */ 1664 32, /* bitsize */ 1665 FALSE, /* pc_relative */ 1666 0, /* bitpos */ 1667 complain_overflow_bitfield, /* complain_on_overflow */ 1668 bfd_elf_generic_reloc, /* special_function */ 1669 "R_PPC_IRELATIVE", /* name */ 1670 FALSE, /* partial_inplace */ 1671 0, /* src_mask */ 1672 0xffffffff, /* dst_mask */ 1673 FALSE), /* pcrel_offset */ 1674 1675 /* A 16 bit relative relocation. */ 1676 HOWTO (R_PPC_REL16, /* type */ 1677 0, /* rightshift */ 1678 1, /* size (0 = byte, 1 = short, 2 = long) */ 1679 16, /* bitsize */ 1680 TRUE, /* pc_relative */ 1681 0, /* bitpos */ 1682 complain_overflow_bitfield, /* complain_on_overflow */ 1683 bfd_elf_generic_reloc, /* special_function */ 1684 "R_PPC_REL16", /* name */ 1685 FALSE, /* partial_inplace */ 1686 0, /* src_mask */ 1687 0xffff, /* dst_mask */ 1688 TRUE), /* pcrel_offset */ 1689 1690 /* A 16 bit relative relocation without overflow. */ 1691 HOWTO (R_PPC_REL16_LO, /* type */ 1692 0, /* rightshift */ 1693 1, /* size (0 = byte, 1 = short, 2 = long) */ 1694 16, /* bitsize */ 1695 TRUE, /* pc_relative */ 1696 0, /* bitpos */ 1697 complain_overflow_dont,/* complain_on_overflow */ 1698 bfd_elf_generic_reloc, /* special_function */ 1699 "R_PPC_REL16_LO", /* name */ 1700 FALSE, /* partial_inplace */ 1701 0, /* src_mask */ 1702 0xffff, /* dst_mask */ 1703 TRUE), /* pcrel_offset */ 1704 1705 /* The high order 16 bits of a relative address. */ 1706 HOWTO (R_PPC_REL16_HI, /* type */ 1707 16, /* rightshift */ 1708 1, /* size (0 = byte, 1 = short, 2 = long) */ 1709 16, /* bitsize */ 1710 TRUE, /* pc_relative */ 1711 0, /* bitpos */ 1712 complain_overflow_dont, /* complain_on_overflow */ 1713 bfd_elf_generic_reloc, /* special_function */ 1714 "R_PPC_REL16_HI", /* name */ 1715 FALSE, /* partial_inplace */ 1716 0, /* src_mask */ 1717 0xffff, /* dst_mask */ 1718 TRUE), /* pcrel_offset */ 1719 1720 /* The high order 16 bits of a relative address, plus 1 if the contents of 1721 the low 16 bits, treated as a signed number, is negative. */ 1722 HOWTO (R_PPC_REL16_HA, /* type */ 1723 16, /* rightshift */ 1724 1, /* size (0 = byte, 1 = short, 2 = long) */ 1725 16, /* bitsize */ 1726 TRUE, /* pc_relative */ 1727 0, /* bitpos */ 1728 complain_overflow_dont, /* complain_on_overflow */ 1729 ppc_elf_addr16_ha_reloc, /* special_function */ 1730 "R_PPC_REL16_HA", /* name */ 1731 FALSE, /* partial_inplace */ 1732 0, /* src_mask */ 1733 0xffff, /* dst_mask */ 1734 TRUE), /* pcrel_offset */ 1735 1736 /* GNU extension to record C++ vtable hierarchy. */ 1737 HOWTO (R_PPC_GNU_VTINHERIT, /* type */ 1738 0, /* rightshift */ 1739 0, /* size (0 = byte, 1 = short, 2 = long) */ 1740 0, /* bitsize */ 1741 FALSE, /* pc_relative */ 1742 0, /* bitpos */ 1743 complain_overflow_dont, /* complain_on_overflow */ 1744 NULL, /* special_function */ 1745 "R_PPC_GNU_VTINHERIT", /* name */ 1746 FALSE, /* partial_inplace */ 1747 0, /* src_mask */ 1748 0, /* dst_mask */ 1749 FALSE), /* pcrel_offset */ 1750 1751 /* GNU extension to record C++ vtable member usage. */ 1752 HOWTO (R_PPC_GNU_VTENTRY, /* type */ 1753 0, /* rightshift */ 1754 0, /* size (0 = byte, 1 = short, 2 = long) */ 1755 0, /* bitsize */ 1756 FALSE, /* pc_relative */ 1757 0, /* bitpos */ 1758 complain_overflow_dont, /* complain_on_overflow */ 1759 NULL, /* special_function */ 1760 "R_PPC_GNU_VTENTRY", /* name */ 1761 FALSE, /* partial_inplace */ 1762 0, /* src_mask */ 1763 0, /* dst_mask */ 1764 FALSE), /* pcrel_offset */ 1765 1766 /* Phony reloc to handle AIX style TOC entries. */ 1767 HOWTO (R_PPC_TOC16, /* type */ 1768 0, /* rightshift */ 1769 1, /* size (0 = byte, 1 = short, 2 = long) */ 1770 16, /* bitsize */ 1771 FALSE, /* pc_relative */ 1772 0, /* bitpos */ 1773 complain_overflow_signed, /* complain_on_overflow */ 1774 bfd_elf_generic_reloc, /* special_function */ 1775 "R_PPC_TOC16", /* name */ 1776 FALSE, /* partial_inplace */ 1777 0, /* src_mask */ 1778 0xffff, /* dst_mask */ 1779 FALSE), /* pcrel_offset */ 1780 }; 1781 1782 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ 1784 1785 static void 1786 ppc_elf_howto_init (void) 1787 { 1788 unsigned int i, type; 1789 1790 for (i = 0; 1791 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 1792 i++) 1793 { 1794 type = ppc_elf_howto_raw[i].type; 1795 if (type >= (sizeof (ppc_elf_howto_table) 1796 / sizeof (ppc_elf_howto_table[0]))) 1797 abort (); 1798 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; 1799 } 1800 } 1801 1802 static reloc_howto_type * 1803 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1804 bfd_reloc_code_real_type code) 1805 { 1806 enum elf_ppc_reloc_type r; 1807 1808 /* Initialize howto table if not already done. */ 1809 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1810 ppc_elf_howto_init (); 1811 1812 switch (code) 1813 { 1814 default: 1815 return NULL; 1816 1817 case BFD_RELOC_NONE: r = R_PPC_NONE; break; 1818 case BFD_RELOC_32: r = R_PPC_ADDR32; break; 1819 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; 1820 case BFD_RELOC_PPC64_ADDR16_DS: 1821 case BFD_RELOC_16: r = R_PPC_ADDR16; break; 1822 case BFD_RELOC_PPC64_ADDR16_LO_DS: 1823 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; 1824 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; 1825 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; 1826 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; 1827 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; 1828 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; 1829 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; 1830 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; 1831 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; 1832 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; 1833 case BFD_RELOC_PPC64_GOT16_DS: 1834 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; 1835 case BFD_RELOC_PPC64_GOT16_LO_DS: 1836 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; 1837 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; 1838 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; 1839 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; 1840 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; 1841 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; 1842 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; 1843 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; 1844 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; 1845 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; 1846 case BFD_RELOC_PPC64_PLT16_LO_DS: 1847 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; 1848 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; 1849 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; 1850 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; 1851 case BFD_RELOC_PPC64_SECTOFF_DS: 1852 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; 1853 case BFD_RELOC_PPC64_SECTOFF_LO_DS: 1854 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; 1855 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; 1856 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; 1857 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; 1858 case BFD_RELOC_PPC64_TOC16_DS: 1859 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; 1860 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; 1861 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; 1862 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; 1863 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; 1864 case BFD_RELOC_PPC64_TPREL16_DS: 1865 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; 1866 case BFD_RELOC_PPC64_TPREL16_LO_DS: 1867 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; 1868 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; 1869 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; 1870 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; 1871 case BFD_RELOC_PPC64_DTPREL16_DS: 1872 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; 1873 case BFD_RELOC_PPC64_DTPREL16_LO_DS: 1874 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; 1875 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; 1876 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; 1877 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; 1878 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; 1879 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; 1880 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; 1881 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; 1882 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; 1883 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; 1884 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; 1885 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; 1886 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; 1887 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; 1888 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; 1889 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; 1890 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; 1891 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; 1892 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; 1893 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; 1894 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; 1895 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; 1896 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; 1897 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; 1898 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; 1899 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; 1900 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; 1901 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; 1902 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; 1903 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; 1904 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; 1905 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; 1906 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; 1907 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; 1908 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; 1909 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; 1910 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break; 1911 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break; 1912 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break; 1913 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break; 1914 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break; 1915 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break; 1916 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break; 1917 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break; 1918 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break; 1919 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break; 1920 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break; 1921 case BFD_RELOC_PPC_VLE_SDAREL_LO16A: 1922 r = R_PPC_VLE_SDAREL_LO16A; 1923 break; 1924 case BFD_RELOC_PPC_VLE_SDAREL_LO16D: 1925 r = R_PPC_VLE_SDAREL_LO16D; 1926 break; 1927 case BFD_RELOC_PPC_VLE_SDAREL_HI16A: 1928 r = R_PPC_VLE_SDAREL_HI16A; 1929 break; 1930 case BFD_RELOC_PPC_VLE_SDAREL_HI16D: 1931 r = R_PPC_VLE_SDAREL_HI16D; 1932 break; 1933 case BFD_RELOC_PPC_VLE_SDAREL_HA16A: 1934 r = R_PPC_VLE_SDAREL_HA16A; 1935 break; 1936 case BFD_RELOC_PPC_VLE_SDAREL_HA16D: 1937 r = R_PPC_VLE_SDAREL_HA16D; 1938 break; 1939 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break; 1940 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break; 1941 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break; 1942 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break; 1943 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; 1944 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; 1945 } 1946 1947 return ppc_elf_howto_table[r]; 1948 }; 1949 1950 static reloc_howto_type * 1951 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1952 const char *r_name) 1953 { 1954 unsigned int i; 1955 1956 for (i = 0; 1957 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); 1958 i++) 1959 if (ppc_elf_howto_raw[i].name != NULL 1960 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0) 1961 return &ppc_elf_howto_raw[i]; 1962 1963 return NULL; 1964 } 1965 1966 /* Set the howto pointer for a PowerPC ELF reloc. */ 1967 1968 static void 1969 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, 1970 arelent *cache_ptr, 1971 Elf_Internal_Rela *dst) 1972 { 1973 /* Initialize howto table if not already done. */ 1974 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 1975 ppc_elf_howto_init (); 1976 1977 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); 1978 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; 1979 1980 /* Just because the above assert didn't trigger doesn't mean that 1981 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */ 1982 if (!cache_ptr->howto) 1983 { 1984 (*_bfd_error_handler) (_("%B: invalid relocation type %d"), 1985 abfd, ELF32_R_TYPE (dst->r_info)); 1986 bfd_set_error (bfd_error_bad_value); 1987 1988 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE]; 1989 } 1990 } 1991 1992 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */ 1993 1994 static bfd_reloc_status_type 1995 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, 1996 arelent *reloc_entry, 1997 asymbol *symbol, 1998 void *data ATTRIBUTE_UNUSED, 1999 asection *input_section, 2000 bfd *output_bfd, 2001 char **error_message ATTRIBUTE_UNUSED) 2002 { 2003 bfd_vma relocation; 2004 2005 if (output_bfd != NULL) 2006 { 2007 reloc_entry->address += input_section->output_offset; 2008 return bfd_reloc_ok; 2009 } 2010 2011 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) 2012 return bfd_reloc_outofrange; 2013 2014 if (bfd_is_com_section (symbol->section)) 2015 relocation = 0; 2016 else 2017 relocation = symbol->value; 2018 2019 relocation += symbol->section->output_section->vma; 2020 relocation += symbol->section->output_offset; 2021 relocation += reloc_entry->addend; 2022 if (reloc_entry->howto->pc_relative) 2023 relocation -= reloc_entry->address; 2024 2025 reloc_entry->addend += (relocation & 0x8000) << 1; 2026 2027 return bfd_reloc_continue; 2028 } 2029 2030 static bfd_reloc_status_type 2031 ppc_elf_unhandled_reloc (bfd *abfd, 2032 arelent *reloc_entry, 2033 asymbol *symbol, 2034 void *data, 2035 asection *input_section, 2036 bfd *output_bfd, 2037 char **error_message) 2038 { 2039 /* If this is a relocatable link (output_bfd test tells us), just 2040 call the generic function. Any adjustment will be done at final 2041 link time. */ 2042 if (output_bfd != NULL) 2043 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2044 input_section, output_bfd, error_message); 2045 2046 if (error_message != NULL) 2047 { 2048 static char buf[60]; 2049 sprintf (buf, _("generic linker can't handle %s"), 2050 reloc_entry->howto->name); 2051 *error_message = buf; 2052 } 2053 return bfd_reloc_dangerous; 2054 } 2055 2056 /* Sections created by the linker. */ 2058 2059 typedef struct elf_linker_section 2060 { 2061 /* Pointer to the bfd section. */ 2062 asection *section; 2063 /* Section name. */ 2064 const char *name; 2065 /* Associated bss section name. */ 2066 const char *bss_name; 2067 /* Associated symbol name. */ 2068 const char *sym_name; 2069 /* Associated symbol. */ 2070 struct elf_link_hash_entry *sym; 2071 } elf_linker_section_t; 2072 2073 /* Linked list of allocated pointer entries. This hangs off of the 2074 symbol lists, and provides allows us to return different pointers, 2075 based on different addend's. */ 2076 2077 typedef struct elf_linker_section_pointers 2078 { 2079 /* next allocated pointer for this symbol */ 2080 struct elf_linker_section_pointers *next; 2081 /* offset of pointer from beginning of section */ 2082 bfd_vma offset; 2083 /* addend used */ 2084 bfd_vma addend; 2085 /* which linker section this is */ 2086 elf_linker_section_t *lsect; 2087 } elf_linker_section_pointers_t; 2088 2089 struct ppc_elf_obj_tdata 2090 { 2091 struct elf_obj_tdata elf; 2092 2093 /* A mapping from local symbols to offsets into the various linker 2094 sections added. This is index by the symbol index. */ 2095 elf_linker_section_pointers_t **linker_section_pointers; 2096 2097 /* Flags used to auto-detect plt type. */ 2098 unsigned int makes_plt_call : 1; 2099 unsigned int has_rel16 : 1; 2100 }; 2101 2102 #define ppc_elf_tdata(bfd) \ 2103 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) 2104 2105 #define elf_local_ptr_offsets(bfd) \ 2106 (ppc_elf_tdata (bfd)->linker_section_pointers) 2107 2108 #define is_ppc_elf(bfd) \ 2109 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ 2110 && elf_object_id (bfd) == PPC32_ELF_DATA) 2111 2112 /* Override the generic function because we store some extras. */ 2113 2114 static bfd_boolean 2115 ppc_elf_mkobject (bfd *abfd) 2116 { 2117 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata), 2118 PPC32_ELF_DATA); 2119 } 2120 2121 /* Fix bad default arch selected for a 32 bit input bfd when the 2122 default is 64 bit. */ 2123 2124 static bfd_boolean 2125 ppc_elf_object_p (bfd *abfd) 2126 { 2127 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) 2128 { 2129 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 2130 2131 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) 2132 { 2133 /* Relies on arch after 64 bit default being 32 bit default. */ 2134 abfd->arch_info = abfd->arch_info->next; 2135 BFD_ASSERT (abfd->arch_info->bits_per_word == 32); 2136 } 2137 } 2138 return TRUE; 2139 } 2140 2141 /* Function to set whether a module needs the -mrelocatable bit set. */ 2142 2143 static bfd_boolean 2144 ppc_elf_set_private_flags (bfd *abfd, flagword flags) 2145 { 2146 BFD_ASSERT (!elf_flags_init (abfd) 2147 || elf_elfheader (abfd)->e_flags == flags); 2148 2149 elf_elfheader (abfd)->e_flags = flags; 2150 elf_flags_init (abfd) = TRUE; 2151 return TRUE; 2152 } 2153 2154 /* Support for core dump NOTE sections. */ 2155 2156 static bfd_boolean 2157 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 2158 { 2159 int offset; 2160 unsigned int size; 2161 2162 switch (note->descsz) 2163 { 2164 default: 2165 return FALSE; 2166 2167 case 268: /* Linux/PPC. */ 2168 /* pr_cursig */ 2169 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 2170 2171 /* pr_pid */ 2172 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24); 2173 2174 /* pr_reg */ 2175 offset = 72; 2176 size = 192; 2177 2178 break; 2179 } 2180 2181 /* Make a ".reg/999" section. */ 2182 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 2183 size, note->descpos + offset); 2184 } 2185 2186 static bfd_boolean 2187 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 2188 { 2189 switch (note->descsz) 2190 { 2191 default: 2192 return FALSE; 2193 2194 case 128: /* Linux/PPC elf_prpsinfo. */ 2195 elf_tdata (abfd)->core_pid 2196 = bfd_get_32 (abfd, note->descdata + 16); 2197 elf_tdata (abfd)->core_program 2198 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); 2199 elf_tdata (abfd)->core_command 2200 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); 2201 } 2202 2203 /* Note that for some reason, a spurious space is tacked 2204 onto the end of the args in some (at least one anyway) 2205 implementations, so strip it off if it exists. */ 2206 2207 { 2208 char *command = elf_tdata (abfd)->core_command; 2209 int n = strlen (command); 2210 2211 if (0 < n && command[n - 1] == ' ') 2212 command[n - 1] = '\0'; 2213 } 2214 2215 return TRUE; 2216 } 2217 2218 static char * 2219 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...) 2220 { 2221 switch (note_type) 2222 { 2223 default: 2224 return NULL; 2225 2226 case NT_PRPSINFO: 2227 { 2228 char data[128]; 2229 va_list ap; 2230 2231 va_start (ap, note_type); 2232 memset (data, 0, sizeof (data)); 2233 strncpy (data + 32, va_arg (ap, const char *), 16); 2234 strncpy (data + 48, va_arg (ap, const char *), 80); 2235 va_end (ap); 2236 return elfcore_write_note (abfd, buf, bufsiz, 2237 "CORE", note_type, data, sizeof (data)); 2238 } 2239 2240 case NT_PRSTATUS: 2241 { 2242 char data[268]; 2243 va_list ap; 2244 long pid; 2245 int cursig; 2246 const void *greg; 2247 2248 va_start (ap, note_type); 2249 memset (data, 0, 72); 2250 pid = va_arg (ap, long); 2251 bfd_put_32 (abfd, pid, data + 24); 2252 cursig = va_arg (ap, int); 2253 bfd_put_16 (abfd, cursig, data + 12); 2254 greg = va_arg (ap, const void *); 2255 memcpy (data + 72, greg, 192); 2256 memset (data + 264, 0, 4); 2257 va_end (ap); 2258 return elfcore_write_note (abfd, buf, bufsiz, 2259 "CORE", note_type, data, sizeof (data)); 2260 } 2261 } 2262 } 2263 2264 static flagword 2265 ppc_elf_lookup_section_flags (char *flag_name) 2266 { 2267 2268 if (!strcmp (flag_name, "SHF_PPC_VLE")) 2269 return SHF_PPC_VLE; 2270 2271 return 0; 2272 } 2273 2274 /* Add the VLE flag if required. */ 2275 2276 bfd_boolean 2277 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr) 2278 { 2279 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle 2280 && (shdr->sh_flags & SHF_EXECINSTR) != 0) 2281 shdr->sh_flags |= SHF_PPC_VLE; 2282 2283 return TRUE; 2284 } 2285 2286 /* Return address for Ith PLT stub in section PLT, for relocation REL 2287 or (bfd_vma) -1 if it should not be included. */ 2288 2289 static bfd_vma 2290 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, 2291 const asection *plt ATTRIBUTE_UNUSED, 2292 const arelent *rel) 2293 { 2294 return rel->address; 2295 } 2296 2297 /* Handle a PowerPC specific section when reading an object file. This 2298 is called when bfd_section_from_shdr finds a section with an unknown 2299 type. */ 2300 2301 static bfd_boolean 2302 ppc_elf_section_from_shdr (bfd *abfd, 2303 Elf_Internal_Shdr *hdr, 2304 const char *name, 2305 int shindex) 2306 { 2307 asection *newsect; 2308 flagword flags; 2309 2310 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) 2311 return FALSE; 2312 2313 newsect = hdr->bfd_section; 2314 flags = bfd_get_section_flags (abfd, newsect); 2315 if (hdr->sh_flags & SHF_EXCLUDE) 2316 flags |= SEC_EXCLUDE; 2317 2318 if (hdr->sh_type == SHT_ORDERED) 2319 flags |= SEC_SORT_ENTRIES; 2320 2321 bfd_set_section_flags (abfd, newsect, flags); 2322 return TRUE; 2323 } 2324 2325 /* Set up any other section flags and such that may be necessary. */ 2326 2327 static bfd_boolean 2328 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, 2329 Elf_Internal_Shdr *shdr, 2330 asection *asect) 2331 { 2332 if ((asect->flags & SEC_SORT_ENTRIES) != 0) 2333 shdr->sh_type = SHT_ORDERED; 2334 2335 return TRUE; 2336 } 2337 2338 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we 2339 need to bump up the number of section headers. */ 2340 2341 static int 2342 ppc_elf_additional_program_headers (bfd *abfd, 2343 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2344 { 2345 asection *s; 2346 int ret = 0; 2347 2348 s = bfd_get_section_by_name (abfd, ".sbss2"); 2349 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2350 ++ret; 2351 2352 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); 2353 if (s != NULL && (s->flags & SEC_ALLOC) != 0) 2354 ++ret; 2355 2356 return ret; 2357 } 2358 2359 /* Modify the segment map for VLE executables. */ 2360 2361 bfd_boolean 2362 ppc_elf_modify_segment_map (bfd *abfd, 2363 struct bfd_link_info *info ATTRIBUTE_UNUSED) 2364 { 2365 struct elf_segment_map *m, *n; 2366 bfd_size_type amt; 2367 unsigned int j, k; 2368 bfd_boolean sect0_vle, sectj_vle; 2369 2370 /* At this point in the link, output sections have already been sorted by 2371 LMA and assigned to segments. All that is left to do is to ensure 2372 there is no mixing of VLE & non-VLE sections in a text segment. 2373 If we find that case, we split the segment. 2374 We maintain the original output section order. */ 2375 2376 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) 2377 { 2378 if (m->count == 0) 2379 continue; 2380 2381 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0; 2382 for (j = 1; j < m->count; ++j) 2383 { 2384 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0; 2385 2386 if (sectj_vle != sect0_vle) 2387 break; 2388 } 2389 if (j >= m->count) 2390 continue; 2391 2392 /* sections 0..j-1 stay in this (current) segment, 2393 the remainder are put in a new segment. 2394 The scan resumes with the new segment. */ 2395 2396 /* Fix the new segment. */ 2397 amt = sizeof (struct elf_segment_map); 2398 amt += (m->count - j - 1) * sizeof (asection *); 2399 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt); 2400 if (n == NULL) 2401 return FALSE; 2402 2403 n->p_type = PT_LOAD; 2404 n->p_flags = PF_X | PF_R; 2405 if (sectj_vle) 2406 n->p_flags |= PF_PPC_VLE; 2407 n->count = m->count - j; 2408 for (k = 0; k < n->count; ++k) 2409 { 2410 n->sections[k] = m->sections[j+k]; 2411 m->sections[j+k] = NULL; 2412 } 2413 n->next = m->next; 2414 m->next = n; 2415 2416 /* Fix the current segment */ 2417 m->count = j; 2418 } 2419 2420 return TRUE; 2421 } 2422 2423 /* Add extra PPC sections -- Note, for now, make .sbss2 and 2424 .PPC.EMB.sbss0 a normal section, and not a bss section so 2425 that the linker doesn't crater when trying to make more than 2426 2 sections. */ 2427 2428 static const struct bfd_elf_special_section ppc_elf_special_sections[] = 2429 { 2430 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, 2431 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 2432 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2433 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2434 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC }, 2435 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC }, 2436 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 }, 2437 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2438 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC }, 2439 { NULL, 0, 0, 0, 0 } 2440 }; 2441 2442 /* This is what we want for new plt/got. */ 2443 static struct bfd_elf_special_section ppc_alt_plt = 2444 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC }; 2445 2446 static const struct bfd_elf_special_section * 2447 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 2448 { 2449 const struct bfd_elf_special_section *ssect; 2450 2451 /* See if this is one of the special sections. */ 2452 if (sec->name == NULL) 2453 return NULL; 2454 2455 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections, 2456 sec->use_rela_p); 2457 if (ssect != NULL) 2458 { 2459 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0) 2460 ssect = &ppc_alt_plt; 2461 return ssect; 2462 } 2463 2464 return _bfd_elf_get_sec_type_attr (abfd, sec); 2465 } 2466 2467 /* Very simple linked list structure for recording apuinfo values. */ 2469 typedef struct apuinfo_list 2470 { 2471 struct apuinfo_list *next; 2472 unsigned long value; 2473 } 2474 apuinfo_list; 2475 2476 static apuinfo_list *head; 2477 static bfd_boolean apuinfo_set; 2478 2479 static void 2480 apuinfo_list_init (void) 2481 { 2482 head = NULL; 2483 apuinfo_set = FALSE; 2484 } 2485 2486 static void 2487 apuinfo_list_add (unsigned long value) 2488 { 2489 apuinfo_list *entry = head; 2490 2491 while (entry != NULL) 2492 { 2493 if (entry->value == value) 2494 return; 2495 entry = entry->next; 2496 } 2497 2498 entry = bfd_malloc (sizeof (* entry)); 2499 if (entry == NULL) 2500 return; 2501 2502 entry->value = value; 2503 entry->next = head; 2504 head = entry; 2505 } 2506 2507 static unsigned 2508 apuinfo_list_length (void) 2509 { 2510 apuinfo_list *entry; 2511 unsigned long count; 2512 2513 for (entry = head, count = 0; 2514 entry; 2515 entry = entry->next) 2516 ++ count; 2517 2518 return count; 2519 } 2520 2521 static inline unsigned long 2522 apuinfo_list_element (unsigned long number) 2523 { 2524 apuinfo_list * entry; 2525 2526 for (entry = head; 2527 entry && number --; 2528 entry = entry->next) 2529 ; 2530 2531 return entry ? entry->value : 0; 2532 } 2533 2534 static void 2535 apuinfo_list_finish (void) 2536 { 2537 apuinfo_list *entry; 2538 2539 for (entry = head; entry;) 2540 { 2541 apuinfo_list *next = entry->next; 2542 free (entry); 2543 entry = next; 2544 } 2545 2546 head = NULL; 2547 } 2548 2549 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" 2550 #define APUINFO_LABEL "APUinfo" 2551 2552 /* Scan the input BFDs and create a linked list of 2553 the APUinfo values that will need to be emitted. */ 2554 2555 static void 2556 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) 2557 { 2558 bfd *ibfd; 2559 asection *asec; 2560 char *buffer = NULL; 2561 bfd_size_type largest_input_size = 0; 2562 unsigned i; 2563 unsigned long length; 2564 const char *error_message = NULL; 2565 2566 if (link_info == NULL) 2567 return; 2568 2569 apuinfo_list_init (); 2570 2571 /* Read in the input sections contents. */ 2572 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) 2573 { 2574 unsigned long datum; 2575 2576 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); 2577 if (asec == NULL) 2578 continue; 2579 2580 error_message = _("corrupt %s section in %B"); 2581 length = asec->size; 2582 if (length < 20) 2583 goto fail; 2584 2585 apuinfo_set = TRUE; 2586 if (largest_input_size < asec->size) 2587 { 2588 if (buffer) 2589 free (buffer); 2590 largest_input_size = asec->size; 2591 buffer = bfd_malloc (largest_input_size); 2592 if (!buffer) 2593 return; 2594 } 2595 2596 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 2597 || (bfd_bread (buffer, length, ibfd) != length)) 2598 { 2599 error_message = _("unable to read in %s section from %B"); 2600 goto fail; 2601 } 2602 2603 /* Verify the contents of the header. Note - we have to 2604 extract the values this way in order to allow for a 2605 host whose endian-ness is different from the target. */ 2606 datum = bfd_get_32 (ibfd, buffer); 2607 if (datum != sizeof APUINFO_LABEL) 2608 goto fail; 2609 2610 datum = bfd_get_32 (ibfd, buffer + 8); 2611 if (datum != 0x2) 2612 goto fail; 2613 2614 if (strcmp (buffer + 12, APUINFO_LABEL) != 0) 2615 goto fail; 2616 2617 /* Get the number of bytes used for apuinfo entries. */ 2618 datum = bfd_get_32 (ibfd, buffer + 4); 2619 if (datum + 20 != length) 2620 goto fail; 2621 2622 /* Scan the apuinfo section, building a list of apuinfo numbers. */ 2623 for (i = 0; i < datum; i += 4) 2624 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i)); 2625 } 2626 2627 error_message = NULL; 2628 2629 if (apuinfo_set) 2630 { 2631 /* Compute the size of the output section. */ 2632 unsigned num_entries = apuinfo_list_length (); 2633 2634 /* Set the output section size, if it exists. */ 2635 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2636 2637 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4)) 2638 { 2639 ibfd = abfd; 2640 error_message = _("warning: unable to set size of %s section in %B"); 2641 } 2642 } 2643 2644 fail: 2645 if (buffer) 2646 free (buffer); 2647 2648 if (error_message) 2649 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); 2650 } 2651 2652 /* Prevent the output section from accumulating the input sections' 2653 contents. We have already stored this in our linked list structure. */ 2654 2655 static bfd_boolean 2656 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, 2657 struct bfd_link_info *link_info ATTRIBUTE_UNUSED, 2658 asection *asec, 2659 bfd_byte *contents ATTRIBUTE_UNUSED) 2660 { 2661 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0; 2662 } 2663 2664 /* Finally we can generate the output section. */ 2665 2666 static void 2667 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) 2668 { 2669 bfd_byte *buffer; 2670 asection *asec; 2671 unsigned i; 2672 unsigned num_entries; 2673 bfd_size_type length; 2674 2675 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); 2676 if (asec == NULL) 2677 return; 2678 2679 if (!apuinfo_set) 2680 return; 2681 2682 length = asec->size; 2683 if (length < 20) 2684 return; 2685 2686 buffer = bfd_malloc (length); 2687 if (buffer == NULL) 2688 { 2689 (*_bfd_error_handler) 2690 (_("failed to allocate space for new APUinfo section.")); 2691 return; 2692 } 2693 2694 /* Create the apuinfo header. */ 2695 num_entries = apuinfo_list_length (); 2696 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); 2697 bfd_put_32 (abfd, num_entries * 4, buffer + 4); 2698 bfd_put_32 (abfd, 0x2, buffer + 8); 2699 strcpy ((char *) buffer + 12, APUINFO_LABEL); 2700 2701 length = 20; 2702 for (i = 0; i < num_entries; i++) 2703 { 2704 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); 2705 length += 4; 2706 } 2707 2708 if (length != asec->size) 2709 (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); 2710 2711 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) 2712 (*_bfd_error_handler) (_("failed to install new APUinfo section.")); 2713 2714 free (buffer); 2715 2716 apuinfo_list_finish (); 2717 } 2718 2719 static bfd_boolean 2721 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off) 2722 { 2723 bfd_byte buf[GLINK_ENTRY_SIZE]; 2724 2725 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE)) 2726 return FALSE; 2727 2728 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11 2729 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11 2730 && bfd_get_32 (abfd, buf + 8) == MTCTR_11 2731 && bfd_get_32 (abfd, buf + 12) == BCTR); 2732 } 2733 2734 static bfd_boolean 2735 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) 2736 { 2737 bfd_vma vma = *(bfd_vma *) ptr; 2738 return ((section->flags & SEC_ALLOC) != 0 2739 && section->vma <= vma 2740 && vma < section->vma + section->size); 2741 } 2742 2743 static long 2744 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms, 2745 long dynsymcount, asymbol **dynsyms, 2746 asymbol **ret) 2747 { 2748 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); 2749 asection *plt, *relplt, *dynamic, *glink; 2750 bfd_vma glink_vma = 0; 2751 bfd_vma resolv_vma = 0; 2752 bfd_vma stub_vma; 2753 asymbol *s; 2754 arelent *p; 2755 long count, i; 2756 size_t size; 2757 char *names; 2758 bfd_byte buf[4]; 2759 2760 *ret = NULL; 2761 2762 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) 2763 return 0; 2764 2765 if (dynsymcount <= 0) 2766 return 0; 2767 2768 relplt = bfd_get_section_by_name (abfd, ".rela.plt"); 2769 if (relplt == NULL) 2770 return 0; 2771 2772 plt = bfd_get_section_by_name (abfd, ".plt"); 2773 if (plt == NULL) 2774 return 0; 2775 2776 /* Call common code to handle old-style executable PLTs. */ 2777 if (elf_section_flags (plt) & SHF_EXECINSTR) 2778 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms, 2779 dynsymcount, dynsyms, ret); 2780 2781 /* If this object was prelinked, the prelinker stored the address 2782 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */ 2783 dynamic = bfd_get_section_by_name (abfd, ".dynamic"); 2784 if (dynamic != NULL) 2785 { 2786 bfd_byte *dynbuf, *extdyn, *extdynend; 2787 size_t extdynsize; 2788 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); 2789 2790 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) 2791 return -1; 2792 2793 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; 2794 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; 2795 2796 extdyn = dynbuf; 2797 extdynend = extdyn + dynamic->size; 2798 for (; extdyn < extdynend; extdyn += extdynsize) 2799 { 2800 Elf_Internal_Dyn dyn; 2801 (*swap_dyn_in) (abfd, extdyn, &dyn); 2802 2803 if (dyn.d_tag == DT_NULL) 2804 break; 2805 2806 if (dyn.d_tag == DT_PPC_GOT) 2807 { 2808 unsigned int g_o_t = dyn.d_un.d_val; 2809 asection *got = bfd_get_section_by_name (abfd, ".got"); 2810 if (got != NULL 2811 && bfd_get_section_contents (abfd, got, buf, 2812 g_o_t - got->vma + 4, 4)) 2813 glink_vma = bfd_get_32 (abfd, buf); 2814 break; 2815 } 2816 } 2817 free (dynbuf); 2818 } 2819 2820 /* Otherwise we read the first plt entry. */ 2821 if (glink_vma == 0) 2822 { 2823 if (bfd_get_section_contents (abfd, plt, buf, 0, 4)) 2824 glink_vma = bfd_get_32 (abfd, buf); 2825 } 2826 2827 if (glink_vma == 0) 2828 return 0; 2829 2830 /* The .glink section usually does not survive the final 2831 link; search for the section (usually .text) where the 2832 glink stubs now reside. */ 2833 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma); 2834 if (glink == NULL) 2835 return 0; 2836 2837 /* Determine glink PLT resolver by reading the relative branch 2838 from the first glink stub. */ 2839 if (bfd_get_section_contents (abfd, glink, buf, 2840 glink_vma - glink->vma, 4)) 2841 { 2842 unsigned int insn = bfd_get_32 (abfd, buf); 2843 2844 /* The first glink stub may either branch to the resolver ... */ 2845 insn ^= B; 2846 if ((insn & ~0x3fffffc) == 0) 2847 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000; 2848 2849 /* ... or fall through a bunch of NOPs. */ 2850 else if ((insn ^ B ^ NOP) == 0) 2851 for (i = 4; 2852 bfd_get_section_contents (abfd, glink, buf, 2853 glink_vma - glink->vma + i, 4); 2854 i += 4) 2855 if (bfd_get_32 (abfd, buf) != NOP) 2856 { 2857 resolv_vma = glink_vma + i; 2858 break; 2859 } 2860 } 2861 2862 count = relplt->size / sizeof (Elf32_External_Rela); 2863 stub_vma = glink_vma - (bfd_vma) count * 16; 2864 /* If the stubs are those for -shared/-pie then we might have 2865 multiple stubs for each plt entry. If that is the case then 2866 there is no way to associate stubs with their plt entries short 2867 of figuring out the GOT pointer value used in the stub. */ 2868 if (!is_nonpic_glink_stub (abfd, glink, 2869 glink_vma - GLINK_ENTRY_SIZE - glink->vma)) 2870 return 0; 2871 2872 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; 2873 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) 2874 return -1; 2875 2876 size = count * sizeof (asymbol); 2877 p = relplt->relocation; 2878 for (i = 0; i < count; i++, p++) 2879 { 2880 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); 2881 if (p->addend != 0) 2882 size += sizeof ("+0x") - 1 + 8; 2883 } 2884 2885 size += sizeof (asymbol) + sizeof ("__glink"); 2886 2887 if (resolv_vma) 2888 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); 2889 2890 s = *ret = bfd_malloc (size); 2891 if (s == NULL) 2892 return -1; 2893 2894 names = (char *) (s + count + 1 + (resolv_vma != 0)); 2895 p = relplt->relocation; 2896 for (i = 0; i < count; i++, p++) 2897 { 2898 size_t len; 2899 2900 *s = **p->sym_ptr_ptr; 2901 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since 2902 we are defining a symbol, ensure one of them is set. */ 2903 if ((s->flags & BSF_LOCAL) == 0) 2904 s->flags |= BSF_GLOBAL; 2905 s->flags |= BSF_SYNTHETIC; 2906 s->section = glink; 2907 s->value = stub_vma - glink->vma; 2908 s->name = names; 2909 s->udata.p = NULL; 2910 len = strlen ((*p->sym_ptr_ptr)->name); 2911 memcpy (names, (*p->sym_ptr_ptr)->name, len); 2912 names += len; 2913 if (p->addend != 0) 2914 { 2915 memcpy (names, "+0x", sizeof ("+0x") - 1); 2916 names += sizeof ("+0x") - 1; 2917 bfd_sprintf_vma (abfd, names, p->addend); 2918 names += strlen (names); 2919 } 2920 memcpy (names, "@plt", sizeof ("@plt")); 2921 names += sizeof ("@plt"); 2922 ++s; 2923 stub_vma += 16; 2924 } 2925 2926 /* Add a symbol at the start of the glink branch table. */ 2927 memset (s, 0, sizeof *s); 2928 s->the_bfd = abfd; 2929 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 2930 s->section = glink; 2931 s->value = glink_vma - glink->vma; 2932 s->name = names; 2933 memcpy (names, "__glink", sizeof ("__glink")); 2934 names += sizeof ("__glink"); 2935 s++; 2936 count++; 2937 2938 if (resolv_vma) 2939 { 2940 /* Add a symbol for the glink PLT resolver. */ 2941 memset (s, 0, sizeof *s); 2942 s->the_bfd = abfd; 2943 s->flags = BSF_GLOBAL | BSF_SYNTHETIC; 2944 s->section = glink; 2945 s->value = resolv_vma - glink->vma; 2946 s->name = names; 2947 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve")); 2948 names += sizeof ("__glink_PLTresolve"); 2949 s++; 2950 count++; 2951 } 2952 2953 return count; 2954 } 2955 2956 /* The following functions are specific to the ELF linker, while 2958 functions above are used generally. They appear in this file more 2959 or less in the order in which they are called. eg. 2960 ppc_elf_check_relocs is called early in the link process, 2961 ppc_elf_finish_dynamic_sections is one of the last functions 2962 called. */ 2963 2964 /* Track PLT entries needed for a given symbol. We might need more 2965 than one glink entry per symbol when generating a pic binary. */ 2966 struct plt_entry 2967 { 2968 struct plt_entry *next; 2969 2970 /* -fPIC uses multiple GOT sections, one per file, called ".got2". 2971 This field stores the offset into .got2 used to initialise the 2972 GOT pointer reg. It will always be at least 32768. (Current 2973 gcc always uses an offset of 32768, but ld -r will pack .got2 2974 sections together resulting in larger offsets). */ 2975 bfd_vma addend; 2976 2977 /* The .got2 section. */ 2978 asection *sec; 2979 2980 /* PLT refcount or offset. */ 2981 union 2982 { 2983 bfd_signed_vma refcount; 2984 bfd_vma offset; 2985 } plt; 2986 2987 /* .glink stub offset. */ 2988 bfd_vma glink_offset; 2989 }; 2990 2991 /* Of those relocs that might be copied as dynamic relocs, this function 2992 selects those that must be copied when linking a shared library, 2993 even when the symbol is local. */ 2994 2995 static int 2996 must_be_dyn_reloc (struct bfd_link_info *info, 2997 enum elf_ppc_reloc_type r_type) 2998 { 2999 switch (r_type) 3000 { 3001 default: 3002 return 1; 3003 3004 case R_PPC_REL24: 3005 case R_PPC_REL14: 3006 case R_PPC_REL14_BRTAKEN: 3007 case R_PPC_REL14_BRNTAKEN: 3008 case R_PPC_REL32: 3009 return 0; 3010 3011 case R_PPC_TPREL32: 3012 case R_PPC_TPREL16: 3013 case R_PPC_TPREL16_LO: 3014 case R_PPC_TPREL16_HI: 3015 case R_PPC_TPREL16_HA: 3016 return !info->executable; 3017 } 3018 } 3019 3020 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 3021 copying dynamic variables from a shared lib into an app's dynbss 3022 section, and instead use a dynamic relocation to point into the 3023 shared lib. */ 3024 #define ELIMINATE_COPY_RELOCS 1 3025 3026 /* PPC ELF linker hash entry. */ 3027 3028 struct ppc_elf_link_hash_entry 3029 { 3030 struct elf_link_hash_entry elf; 3031 3032 /* If this symbol is used in the linker created sections, the processor 3033 specific backend uses this field to map the field into the offset 3034 from the beginning of the section. */ 3035 elf_linker_section_pointers_t *linker_section_pointer; 3036 3037 /* Track dynamic relocs copied for this symbol. */ 3038 struct elf_dyn_relocs *dyn_relocs; 3039 3040 /* Contexts in which symbol is used in the GOT (or TOC). 3041 TLS_GD .. TLS_TLS bits are or'd into the mask as the 3042 corresponding relocs are encountered during check_relocs. 3043 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 3044 indicate the corresponding GOT entry type is not needed. */ 3045 #define TLS_GD 1 /* GD reloc. */ 3046 #define TLS_LD 2 /* LD reloc. */ 3047 #define TLS_TPREL 4 /* TPREL reloc, => IE. */ 3048 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 3049 #define TLS_TLS 16 /* Any TLS reloc. */ 3050 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ 3051 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */ 3052 char tls_mask; 3053 3054 /* Nonzero if we have seen a small data relocation referring to this 3055 symbol. */ 3056 unsigned char has_sda_refs; 3057 }; 3058 3059 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) 3060 3061 /* PPC ELF linker hash table. */ 3062 3063 struct ppc_elf_link_hash_table 3064 { 3065 struct elf_link_hash_table elf; 3066 3067 /* Short-cuts to get to dynamic linker sections. */ 3068 asection *got; 3069 asection *relgot; 3070 asection *glink; 3071 asection *plt; 3072 asection *relplt; 3073 asection *iplt; 3074 asection *reliplt; 3075 asection *dynbss; 3076 asection *relbss; 3077 asection *dynsbss; 3078 asection *relsbss; 3079 elf_linker_section_t sdata[2]; 3080 asection *sbss; 3081 asection *glink_eh_frame; 3082 3083 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */ 3084 asection *srelplt2; 3085 3086 /* The .got.plt section (VxWorks only)*/ 3087 asection *sgotplt; 3088 3089 /* Shortcut to __tls_get_addr. */ 3090 struct elf_link_hash_entry *tls_get_addr; 3091 3092 /* The bfd that forced an old-style PLT. */ 3093 bfd *old_bfd; 3094 3095 /* TLS local dynamic got entry handling. */ 3096 union { 3097 bfd_signed_vma refcount; 3098 bfd_vma offset; 3099 } tlsld_got; 3100 3101 /* Offset of branch table to PltResolve function in glink. */ 3102 bfd_vma glink_pltresolve; 3103 3104 /* Size of reserved GOT entries. */ 3105 unsigned int got_header_size; 3106 /* Non-zero if allocating the header left a gap. */ 3107 unsigned int got_gap; 3108 3109 /* The type of PLT we have chosen to use. */ 3110 enum ppc_elf_plt_type plt_type; 3111 3112 /* Set if we should emit symbols for stubs. */ 3113 unsigned int emit_stub_syms:1; 3114 3115 /* Set if __tls_get_addr optimization should not be done. */ 3116 unsigned int no_tls_get_addr_opt:1; 3117 3118 /* True if the target system is VxWorks. */ 3119 unsigned int is_vxworks:1; 3120 3121 /* The size of PLT entries. */ 3122 int plt_entry_size; 3123 /* The distance between adjacent PLT slots. */ 3124 int plt_slot_size; 3125 /* The size of the first PLT entry. */ 3126 int plt_initial_entry_size; 3127 3128 /* Small local sym cache. */ 3129 struct sym_cache sym_cache; 3130 }; 3131 3132 /* Rename some of the generic section flags to better document how they 3133 are used for ppc32. The flags are only valid for ppc32 elf objects. */ 3134 3135 /* Nonzero if this section has TLS related relocations. */ 3136 #define has_tls_reloc sec_flg0 3137 3138 /* Nonzero if this section has a call to __tls_get_addr. */ 3139 #define has_tls_get_addr_call sec_flg1 3140 3141 /* Get the PPC ELF linker hash table from a link_info structure. */ 3142 3143 #define ppc_elf_hash_table(p) \ 3144 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ 3145 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL) 3146 3147 /* Create an entry in a PPC ELF linker hash table. */ 3148 3149 static struct bfd_hash_entry * 3150 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, 3151 struct bfd_hash_table *table, 3152 const char *string) 3153 { 3154 /* Allocate the structure if it has not already been allocated by a 3155 subclass. */ 3156 if (entry == NULL) 3157 { 3158 entry = bfd_hash_allocate (table, 3159 sizeof (struct ppc_elf_link_hash_entry)); 3160 if (entry == NULL) 3161 return entry; 3162 } 3163 3164 /* Call the allocation method of the superclass. */ 3165 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 3166 if (entry != NULL) 3167 { 3168 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; 3169 ppc_elf_hash_entry (entry)->dyn_relocs = NULL; 3170 ppc_elf_hash_entry (entry)->tls_mask = 0; 3171 ppc_elf_hash_entry (entry)->has_sda_refs = 0; 3172 } 3173 3174 return entry; 3175 } 3176 3177 /* Create a PPC ELF linker hash table. */ 3178 3179 static struct bfd_link_hash_table * 3180 ppc_elf_link_hash_table_create (bfd *abfd) 3181 { 3182 struct ppc_elf_link_hash_table *ret; 3183 3184 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); 3185 if (ret == NULL) 3186 return NULL; 3187 3188 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, 3189 ppc_elf_link_hash_newfunc, 3190 sizeof (struct ppc_elf_link_hash_entry), 3191 PPC32_ELF_DATA)) 3192 { 3193 free (ret); 3194 return NULL; 3195 } 3196 3197 ret->elf.init_plt_refcount.refcount = 0; 3198 ret->elf.init_plt_refcount.glist = NULL; 3199 ret->elf.init_plt_offset.offset = 0; 3200 ret->elf.init_plt_offset.glist = NULL; 3201 3202 ret->sdata[0].name = ".sdata"; 3203 ret->sdata[0].sym_name = "_SDA_BASE_"; 3204 ret->sdata[0].bss_name = ".sbss"; 3205 3206 ret->sdata[1].name = ".sdata2"; 3207 ret->sdata[1].sym_name = "_SDA2_BASE_"; 3208 ret->sdata[1].bss_name = ".sbss2"; 3209 3210 ret->plt_entry_size = 12; 3211 ret->plt_slot_size = 8; 3212 ret->plt_initial_entry_size = 72; 3213 3214 return &ret->elf.root; 3215 } 3216 3217 /* Create .got and the related sections. */ 3218 3219 static bfd_boolean 3220 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) 3221 { 3222 struct ppc_elf_link_hash_table *htab; 3223 asection *s; 3224 flagword flags; 3225 3226 if (!_bfd_elf_create_got_section (abfd, info)) 3227 return FALSE; 3228 3229 htab = ppc_elf_hash_table (info); 3230 htab->got = s = bfd_get_linker_section (abfd, ".got"); 3231 if (s == NULL) 3232 abort (); 3233 3234 if (htab->is_vxworks) 3235 { 3236 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt"); 3237 if (!htab->sgotplt) 3238 abort (); 3239 } 3240 else 3241 { 3242 /* The powerpc .got has a blrl instruction in it. Mark it 3243 executable. */ 3244 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS 3245 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3246 if (!bfd_set_section_flags (abfd, s, flags)) 3247 return FALSE; 3248 } 3249 3250 htab->relgot = bfd_get_linker_section (abfd, ".rela.got"); 3251 if (!htab->relgot) 3252 abort (); 3253 3254 return TRUE; 3255 } 3256 3257 static bfd_boolean 3258 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info) 3259 { 3260 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3261 asection *s; 3262 flagword flags; 3263 3264 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS 3265 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3266 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags); 3267 htab->glink = s; 3268 if (s == NULL 3269 || !bfd_set_section_alignment (abfd, s, 4)) 3270 return FALSE; 3271 3272 if (!info->no_ld_generated_unwind_info) 3273 { 3274 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3275 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3276 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags); 3277 htab->glink_eh_frame = s; 3278 if (s == NULL 3279 || !bfd_set_section_alignment (abfd, s, 2)) 3280 return FALSE; 3281 } 3282 3283 flags = SEC_ALLOC | SEC_LINKER_CREATED; 3284 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags); 3285 htab->iplt = s; 3286 if (s == NULL 3287 || !bfd_set_section_alignment (abfd, s, 4)) 3288 return FALSE; 3289 3290 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3291 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3292 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags); 3293 htab->reliplt = s; 3294 if (s == NULL 3295 || ! bfd_set_section_alignment (abfd, s, 2)) 3296 return FALSE; 3297 return TRUE; 3298 } 3299 3300 /* We have to create .dynsbss and .rela.sbss here so that they get mapped 3301 to output sections (just like _bfd_elf_create_dynamic_sections has 3302 to create .dynbss and .rela.bss). */ 3303 3304 static bfd_boolean 3305 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) 3306 { 3307 struct ppc_elf_link_hash_table *htab; 3308 asection *s; 3309 flagword flags; 3310 3311 htab = ppc_elf_hash_table (info); 3312 3313 if (htab->got == NULL 3314 && !ppc_elf_create_got (abfd, info)) 3315 return FALSE; 3316 3317 if (!_bfd_elf_create_dynamic_sections (abfd, info)) 3318 return FALSE; 3319 3320 if (htab->glink == NULL 3321 && !ppc_elf_create_glink (abfd, info)) 3322 return FALSE; 3323 3324 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss"); 3325 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss", 3326 SEC_ALLOC | SEC_LINKER_CREATED); 3327 htab->dynsbss = s; 3328 if (s == NULL) 3329 return FALSE; 3330 3331 if (! info->shared) 3332 { 3333 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss"); 3334 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS 3335 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3336 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags); 3337 htab->relsbss = s; 3338 if (s == NULL 3339 || ! bfd_set_section_alignment (abfd, s, 2)) 3340 return FALSE; 3341 } 3342 3343 if (htab->is_vxworks 3344 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2)) 3345 return FALSE; 3346 3347 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt"); 3348 htab->plt = s = bfd_get_linker_section (abfd, ".plt"); 3349 if (s == NULL) 3350 abort (); 3351 3352 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; 3353 if (htab->plt_type == PLT_VXWORKS) 3354 /* The VxWorks PLT is a loaded section with contents. */ 3355 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; 3356 return bfd_set_section_flags (abfd, s, flags); 3357 } 3358 3359 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 3360 3361 static void 3362 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info, 3363 struct elf_link_hash_entry *dir, 3364 struct elf_link_hash_entry *ind) 3365 { 3366 struct ppc_elf_link_hash_entry *edir, *eind; 3367 3368 edir = (struct ppc_elf_link_hash_entry *) dir; 3369 eind = (struct ppc_elf_link_hash_entry *) ind; 3370 3371 edir->tls_mask |= eind->tls_mask; 3372 edir->has_sda_refs |= eind->has_sda_refs; 3373 3374 /* If called to transfer flags for a weakdef during processing 3375 of elf_adjust_dynamic_symbol, don't copy non_got_ref. 3376 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 3377 if (!(ELIMINATE_COPY_RELOCS 3378 && eind->elf.root.type != bfd_link_hash_indirect 3379 && edir->elf.dynamic_adjusted)) 3380 edir->elf.non_got_ref |= eind->elf.non_got_ref; 3381 3382 edir->elf.ref_dynamic |= eind->elf.ref_dynamic; 3383 edir->elf.ref_regular |= eind->elf.ref_regular; 3384 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; 3385 edir->elf.needs_plt |= eind->elf.needs_plt; 3386 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; 3387 3388 if (eind->dyn_relocs != NULL) 3389 { 3390 if (edir->dyn_relocs != NULL) 3391 { 3392 struct elf_dyn_relocs **pp; 3393 struct elf_dyn_relocs *p; 3394 3395 /* Add reloc counts against the indirect sym to the direct sym 3396 list. Merge any entries against the same section. */ 3397 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 3398 { 3399 struct elf_dyn_relocs *q; 3400 3401 for (q = edir->dyn_relocs; q != NULL; q = q->next) 3402 if (q->sec == p->sec) 3403 { 3404 q->pc_count += p->pc_count; 3405 q->count += p->count; 3406 *pp = p->next; 3407 break; 3408 } 3409 if (q == NULL) 3410 pp = &p->next; 3411 } 3412 *pp = edir->dyn_relocs; 3413 } 3414 3415 edir->dyn_relocs = eind->dyn_relocs; 3416 eind->dyn_relocs = NULL; 3417 } 3418 3419 /* If we were called to copy over info for a weak sym, that's all. 3420 You might think dyn_relocs need not be copied over; After all, 3421 both syms will be dynamic or both non-dynamic so we're just 3422 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS 3423 code in ppc_elf_adjust_dynamic_symbol needs to check for 3424 dyn_relocs in read-only sections, and it does so on what is the 3425 DIR sym here. */ 3426 if (eind->elf.root.type != bfd_link_hash_indirect) 3427 return; 3428 3429 /* Copy over the GOT refcount entries that we may have already seen to 3430 the symbol which just became indirect. */ 3431 edir->elf.got.refcount += eind->elf.got.refcount; 3432 eind->elf.got.refcount = 0; 3433 3434 /* And plt entries. */ 3435 if (eind->elf.plt.plist != NULL) 3436 { 3437 if (edir->elf.plt.plist != NULL) 3438 { 3439 struct plt_entry **entp; 3440 struct plt_entry *ent; 3441 3442 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) 3443 { 3444 struct plt_entry *dent; 3445 3446 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) 3447 if (dent->sec == ent->sec && dent->addend == ent->addend) 3448 { 3449 dent->plt.refcount += ent->plt.refcount; 3450 *entp = ent->next; 3451 break; 3452 } 3453 if (dent == NULL) 3454 entp = &ent->next; 3455 } 3456 *entp = edir->elf.plt.plist; 3457 } 3458 3459 edir->elf.plt.plist = eind->elf.plt.plist; 3460 eind->elf.plt.plist = NULL; 3461 } 3462 3463 if (eind->elf.dynindx != -1) 3464 { 3465 if (edir->elf.dynindx != -1) 3466 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 3467 edir->elf.dynstr_index); 3468 edir->elf.dynindx = eind->elf.dynindx; 3469 edir->elf.dynstr_index = eind->elf.dynstr_index; 3470 eind->elf.dynindx = -1; 3471 eind->elf.dynstr_index = 0; 3472 } 3473 } 3474 3475 /* Hook called by the linker routine which adds symbols from an object 3476 file. We use it to put .comm items in .sbss, and not .bss. */ 3477 3478 static bfd_boolean 3479 ppc_elf_add_symbol_hook (bfd *abfd, 3480 struct bfd_link_info *info, 3481 Elf_Internal_Sym *sym, 3482 const char **namep ATTRIBUTE_UNUSED, 3483 flagword *flagsp ATTRIBUTE_UNUSED, 3484 asection **secp, 3485 bfd_vma *valp) 3486 { 3487 if (sym->st_shndx == SHN_COMMON 3488 && !info->relocatable 3489 && is_ppc_elf (info->output_bfd) 3490 && sym->st_size <= elf_gp_size (abfd)) 3491 { 3492 /* Common symbols less than or equal to -G nn bytes are automatically 3493 put into .sbss. */ 3494 struct ppc_elf_link_hash_table *htab; 3495 3496 htab = ppc_elf_hash_table (info); 3497 if (htab->sbss == NULL) 3498 { 3499 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; 3500 3501 if (!htab->elf.dynobj) 3502 htab->elf.dynobj = abfd; 3503 3504 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 3505 ".sbss", 3506 flags); 3507 if (htab->sbss == NULL) 3508 return FALSE; 3509 } 3510 3511 *secp = htab->sbss; 3512 *valp = sym->st_size; 3513 } 3514 3515 if ((abfd->flags & DYNAMIC) == 0 3516 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC 3517 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) 3518 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; 3519 3520 return TRUE; 3521 } 3522 3523 static bfd_boolean 3525 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect) 3526 { 3527 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3528 3529 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name, 3530 TRUE, FALSE, TRUE); 3531 if (lsect->sym == NULL) 3532 return FALSE; 3533 if (lsect->sym->root.type == bfd_link_hash_new) 3534 lsect->sym->non_elf = 0; 3535 lsect->sym->ref_regular = 1; 3536 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE); 3537 return TRUE; 3538 } 3539 3540 /* Create a special linker section. */ 3541 3542 static bfd_boolean 3543 ppc_elf_create_linker_section (bfd *abfd, 3544 struct bfd_link_info *info, 3545 flagword flags, 3546 elf_linker_section_t *lsect) 3547 { 3548 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 3549 asection *s; 3550 3551 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3552 | SEC_LINKER_CREATED); 3553 3554 /* Record the first bfd that needs the special sections. */ 3555 if (!htab->elf.dynobj) 3556 htab->elf.dynobj = abfd; 3557 3558 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj, 3559 lsect->name, 3560 flags); 3561 if (s == NULL 3562 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2)) 3563 return FALSE; 3564 lsect->section = s; 3565 3566 return create_sdata_sym (info, lsect); 3567 } 3568 3569 /* Find a linker generated pointer with a given addend and type. */ 3570 3571 static elf_linker_section_pointers_t * 3572 elf_find_pointer_linker_section 3573 (elf_linker_section_pointers_t *linker_pointers, 3574 bfd_vma addend, 3575 elf_linker_section_t *lsect) 3576 { 3577 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) 3578 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) 3579 return linker_pointers; 3580 3581 return NULL; 3582 } 3583 3584 /* Allocate a pointer to live in a linker created section. */ 3585 3586 static bfd_boolean 3587 elf_create_pointer_linker_section (bfd *abfd, 3588 elf_linker_section_t *lsect, 3589 struct elf_link_hash_entry *h, 3590 const Elf_Internal_Rela *rel) 3591 { 3592 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; 3593 elf_linker_section_pointers_t *linker_section_ptr; 3594 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 3595 bfd_size_type amt; 3596 3597 BFD_ASSERT (lsect != NULL); 3598 3599 /* Is this a global symbol? */ 3600 if (h != NULL) 3601 { 3602 struct ppc_elf_link_hash_entry *eh; 3603 3604 /* Has this symbol already been allocated? If so, our work is done. */ 3605 eh = (struct ppc_elf_link_hash_entry *) h; 3606 if (elf_find_pointer_linker_section (eh->linker_section_pointer, 3607 rel->r_addend, 3608 lsect)) 3609 return TRUE; 3610 3611 ptr_linker_section_ptr = &eh->linker_section_pointer; 3612 } 3613 else 3614 { 3615 BFD_ASSERT (is_ppc_elf (abfd)); 3616 3617 /* Allocation of a pointer to a local symbol. */ 3618 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); 3619 3620 /* Allocate a table to hold the local symbols if first time. */ 3621 if (!ptr) 3622 { 3623 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info; 3624 3625 amt = num_symbols; 3626 amt *= sizeof (elf_linker_section_pointers_t *); 3627 ptr = bfd_zalloc (abfd, amt); 3628 3629 if (!ptr) 3630 return FALSE; 3631 3632 elf_local_ptr_offsets (abfd) = ptr; 3633 } 3634 3635 /* Has this symbol already been allocated? If so, our work is done. */ 3636 if (elf_find_pointer_linker_section (ptr[r_symndx], 3637 rel->r_addend, 3638 lsect)) 3639 return TRUE; 3640 3641 ptr_linker_section_ptr = &ptr[r_symndx]; 3642 } 3643 3644 /* Allocate space for a pointer in the linker section, and allocate 3645 a new pointer record from internal memory. */ 3646 BFD_ASSERT (ptr_linker_section_ptr != NULL); 3647 amt = sizeof (elf_linker_section_pointers_t); 3648 linker_section_ptr = bfd_alloc (abfd, amt); 3649 3650 if (!linker_section_ptr) 3651 return FALSE; 3652 3653 linker_section_ptr->next = *ptr_linker_section_ptr; 3654 linker_section_ptr->addend = rel->r_addend; 3655 linker_section_ptr->lsect = lsect; 3656 *ptr_linker_section_ptr = linker_section_ptr; 3657 3658 linker_section_ptr->offset = lsect->section->size; 3659 lsect->section->size += 4; 3660 3661 #ifdef DEBUG 3662 fprintf (stderr, 3663 "Create pointer in linker section %s, offset = %ld, section size = %ld\n", 3664 lsect->name, (long) linker_section_ptr->offset, 3665 (long) lsect->section->size); 3666 #endif 3667 3668 return TRUE; 3669 } 3670 3671 static struct plt_entry ** 3672 update_local_sym_info (bfd *abfd, 3673 Elf_Internal_Shdr *symtab_hdr, 3674 unsigned long r_symndx, 3675 int tls_type) 3676 { 3677 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); 3678 struct plt_entry **local_plt; 3679 char *local_got_tls_masks; 3680 3681 if (local_got_refcounts == NULL) 3682 { 3683 bfd_size_type size = symtab_hdr->sh_info; 3684 3685 size *= (sizeof (*local_got_refcounts) 3686 + sizeof (*local_plt) 3687 + sizeof (*local_got_tls_masks)); 3688 local_got_refcounts = bfd_zalloc (abfd, size); 3689 if (local_got_refcounts == NULL) 3690 return NULL; 3691 elf_local_got_refcounts (abfd) = local_got_refcounts; 3692 } 3693 3694 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info); 3695 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info); 3696 local_got_tls_masks[r_symndx] |= tls_type; 3697 if (tls_type != PLT_IFUNC) 3698 local_got_refcounts[r_symndx] += 1; 3699 return local_plt + r_symndx; 3700 } 3701 3702 static bfd_boolean 3703 update_plt_info (bfd *abfd, struct plt_entry **plist, 3704 asection *sec, bfd_vma addend) 3705 { 3706 struct plt_entry *ent; 3707 3708 if (addend < 32768) 3709 sec = NULL; 3710 for (ent = *plist; ent != NULL; ent = ent->next) 3711 if (ent->sec == sec && ent->addend == addend) 3712 break; 3713 if (ent == NULL) 3714 { 3715 bfd_size_type amt = sizeof (*ent); 3716 ent = bfd_alloc (abfd, amt); 3717 if (ent == NULL) 3718 return FALSE; 3719 ent->next = *plist; 3720 ent->sec = sec; 3721 ent->addend = addend; 3722 ent->plt.refcount = 0; 3723 *plist = ent; 3724 } 3725 ent->plt.refcount += 1; 3726 return TRUE; 3727 } 3728 3729 static struct plt_entry * 3730 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend) 3731 { 3732 struct plt_entry *ent; 3733 3734 if (addend < 32768) 3735 sec = NULL; 3736 for (ent = *plist; ent != NULL; ent = ent->next) 3737 if (ent->sec == sec && ent->addend == addend) 3738 break; 3739 return ent; 3740 } 3741 3742 static bfd_boolean 3743 is_branch_reloc (enum elf_ppc_reloc_type r_type) 3744 { 3745 return (r_type == R_PPC_PLTREL24 3746 || r_type == R_PPC_LOCAL24PC 3747 || r_type == R_PPC_REL24 3748 || r_type == R_PPC_REL14 3749 || r_type == R_PPC_REL14_BRTAKEN 3750 || r_type == R_PPC_REL14_BRNTAKEN 3751 || r_type == R_PPC_ADDR24 3752 || r_type == R_PPC_ADDR14 3753 || r_type == R_PPC_ADDR14_BRTAKEN 3754 || r_type == R_PPC_ADDR14_BRNTAKEN); 3755 } 3756 3757 static void 3758 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) 3759 { 3760 (*_bfd_error_handler) 3761 (_("%B: relocation %s cannot be used when making a shared object"), 3762 abfd, 3763 ppc_elf_howto_table[r_type]->name); 3764 bfd_set_error (bfd_error_bad_value); 3765 } 3766 3767 /* Look through the relocs for a section during the first phase, and 3768 allocate space in the global offset table or procedure linkage 3769 table. */ 3770 3771 static bfd_boolean 3772 ppc_elf_check_relocs (bfd *abfd, 3773 struct bfd_link_info *info, 3774 asection *sec, 3775 const Elf_Internal_Rela *relocs) 3776 { 3777 struct ppc_elf_link_hash_table *htab; 3778 Elf_Internal_Shdr *symtab_hdr; 3779 struct elf_link_hash_entry **sym_hashes; 3780 const Elf_Internal_Rela *rel; 3781 const Elf_Internal_Rela *rel_end; 3782 asection *got2, *sreloc; 3783 struct elf_link_hash_entry *tga; 3784 3785 if (info->relocatable) 3786 return TRUE; 3787 3788 /* Don't do anything special with non-loaded, non-alloced sections. 3789 In particular, any relocs in such sections should not affect GOT 3790 and PLT reference counting (ie. we don't allow them to create GOT 3791 or PLT entries), there's no possibility or desire to optimize TLS 3792 relocs, and there's not much point in propagating relocs to shared 3793 libs that the dynamic linker won't relocate. */ 3794 if ((sec->flags & SEC_ALLOC) == 0) 3795 return TRUE; 3796 3797 #ifdef DEBUG 3798 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", 3799 sec, abfd); 3800 #endif 3801 3802 BFD_ASSERT (is_ppc_elf (abfd)); 3803 3804 /* Initialize howto table if not already done. */ 3805 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 3806 ppc_elf_howto_init (); 3807 3808 htab = ppc_elf_hash_table (info); 3809 if (htab->glink == NULL) 3810 { 3811 if (htab->elf.dynobj == NULL) 3812 htab->elf.dynobj = abfd; 3813 if (!ppc_elf_create_glink (htab->elf.dynobj, info)) 3814 return FALSE; 3815 } 3816 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 3817 FALSE, FALSE, TRUE); 3818 symtab_hdr = &elf_symtab_hdr (abfd); 3819 sym_hashes = elf_sym_hashes (abfd); 3820 got2 = bfd_get_section_by_name (abfd, ".got2"); 3821 sreloc = NULL; 3822 3823 rel_end = relocs + sec->reloc_count; 3824 for (rel = relocs; rel < rel_end; rel++) 3825 { 3826 unsigned long r_symndx; 3827 enum elf_ppc_reloc_type r_type; 3828 struct elf_link_hash_entry *h; 3829 int tls_type; 3830 3831 r_symndx = ELF32_R_SYM (rel->r_info); 3832 if (r_symndx < symtab_hdr->sh_info) 3833 h = NULL; 3834 else 3835 { 3836 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3837 while (h->root.type == bfd_link_hash_indirect 3838 || h->root.type == bfd_link_hash_warning) 3839 h = (struct elf_link_hash_entry *) h->root.u.i.link; 3840 } 3841 3842 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. 3843 This shows up in particular in an R_PPC_ADDR32 in the eabi 3844 startup code. */ 3845 if (h != NULL 3846 && htab->got == NULL 3847 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) 3848 { 3849 if (htab->elf.dynobj == NULL) 3850 htab->elf.dynobj = abfd; 3851 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 3852 return FALSE; 3853 BFD_ASSERT (h == htab->elf.hgot); 3854 } 3855 3856 tls_type = 0; 3857 r_type = ELF32_R_TYPE (rel->r_info); 3858 if (h == NULL && !htab->is_vxworks) 3859 { 3860 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache, 3861 abfd, r_symndx); 3862 if (isym == NULL) 3863 return FALSE; 3864 3865 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC 3866 && (!info->shared 3867 || is_branch_reloc (r_type))) 3868 { 3869 struct plt_entry **ifunc; 3870 bfd_vma addend; 3871 3872 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, 3873 PLT_IFUNC); 3874 if (ifunc == NULL) 3875 return FALSE; 3876 3877 /* STT_GNU_IFUNC symbols must have a PLT entry; 3878 In a non-pie executable even when there are 3879 no plt calls. */ 3880 addend = 0; 3881 if (r_type == R_PPC_PLTREL24) 3882 { 3883 ppc_elf_tdata (abfd)->makes_plt_call = 1; 3884 if (info->shared) 3885 addend = rel->r_addend; 3886 } 3887 if (!update_plt_info (abfd, ifunc, got2, addend)) 3888 return FALSE; 3889 } 3890 } 3891 3892 if (!htab->is_vxworks 3893 && is_branch_reloc (r_type) 3894 && h != NULL 3895 && h == tga) 3896 { 3897 if (rel != relocs 3898 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD 3899 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD)) 3900 /* We have a new-style __tls_get_addr call with a marker 3901 reloc. */ 3902 ; 3903 else 3904 /* Mark this section as having an old-style call. */ 3905 sec->has_tls_get_addr_call = 1; 3906 } 3907 3908 switch ((int)r_type) 3909 { 3910 case R_PPC_TLSGD: 3911 case R_PPC_TLSLD: 3912 /* These special tls relocs tie a call to __tls_get_addr with 3913 its parameter symbol. */ 3914 break; 3915 3916 case R_PPC_GOT_TLSLD16: 3917 case R_PPC_GOT_TLSLD16_LO: 3918 case R_PPC_GOT_TLSLD16_HI: 3919 case R_PPC_GOT_TLSLD16_HA: 3920 tls_type = TLS_TLS | TLS_LD; 3921 goto dogottls; 3922 3923 case R_PPC_GOT_TLSGD16: 3924 case R_PPC_GOT_TLSGD16_LO: 3925 case R_PPC_GOT_TLSGD16_HI: 3926 case R_PPC_GOT_TLSGD16_HA: 3927 tls_type = TLS_TLS | TLS_GD; 3928 goto dogottls; 3929 3930 case R_PPC_GOT_TPREL16: 3931 case R_PPC_GOT_TPREL16_LO: 3932 case R_PPC_GOT_TPREL16_HI: 3933 case R_PPC_GOT_TPREL16_HA: 3934 if (!info->executable) 3935 info->flags |= DF_STATIC_TLS; 3936 tls_type = TLS_TLS | TLS_TPREL; 3937 goto dogottls; 3938 3939 case R_PPC_GOT_DTPREL16: 3940 case R_PPC_GOT_DTPREL16_LO: 3941 case R_PPC_GOT_DTPREL16_HI: 3942 case R_PPC_GOT_DTPREL16_HA: 3943 tls_type = TLS_TLS | TLS_DTPREL; 3944 dogottls: 3945 sec->has_tls_reloc = 1; 3946 /* Fall thru */ 3947 3948 /* GOT16 relocations */ 3949 case R_PPC_GOT16: 3950 case R_PPC_GOT16_LO: 3951 case R_PPC_GOT16_HI: 3952 case R_PPC_GOT16_HA: 3953 /* This symbol requires a global offset table entry. */ 3954 if (htab->got == NULL) 3955 { 3956 if (htab->elf.dynobj == NULL) 3957 htab->elf.dynobj = abfd; 3958 if (!ppc_elf_create_got (htab->elf.dynobj, info)) 3959 return FALSE; 3960 } 3961 if (h != NULL) 3962 { 3963 h->got.refcount += 1; 3964 ppc_elf_hash_entry (h)->tls_mask |= tls_type; 3965 } 3966 else 3967 /* This is a global offset table entry for a local symbol. */ 3968 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) 3969 return FALSE; 3970 3971 /* We may also need a plt entry if the symbol turns out to be 3972 an ifunc. */ 3973 if (h != NULL && !info->shared) 3974 { 3975 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 3976 return FALSE; 3977 } 3978 break; 3979 3980 /* Indirect .sdata relocation. */ 3981 case R_PPC_EMB_SDAI16: 3982 if (info->shared) 3983 { 3984 bad_shared_reloc (abfd, r_type); 3985 return FALSE; 3986 } 3987 if (htab->sdata[0].section == NULL 3988 && !ppc_elf_create_linker_section (abfd, info, 0, 3989 &htab->sdata[0])) 3990 return FALSE; 3991 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0], 3992 h, rel)) 3993 return FALSE; 3994 if (h != NULL) 3995 { 3996 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 3997 h->non_got_ref = TRUE; 3998 } 3999 break; 4000 4001 /* Indirect .sdata2 relocation. */ 4002 case R_PPC_EMB_SDA2I16: 4003 if (info->shared) 4004 { 4005 bad_shared_reloc (abfd, r_type); 4006 return FALSE; 4007 } 4008 if (htab->sdata[1].section == NULL 4009 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY, 4010 &htab->sdata[1])) 4011 return FALSE; 4012 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1], 4013 h, rel)) 4014 return FALSE; 4015 if (h != NULL) 4016 { 4017 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4018 h->non_got_ref = TRUE; 4019 } 4020 break; 4021 4022 case R_PPC_VLE_SDAREL_LO16A: 4023 case R_PPC_VLE_SDAREL_LO16D: 4024 case R_PPC_VLE_SDAREL_HI16A: 4025 case R_PPC_VLE_SDAREL_HI16D: 4026 case R_PPC_VLE_SDAREL_HA16A: 4027 case R_PPC_VLE_SDAREL_HA16D: 4028 case R_PPC_SDAREL16: 4029 if (htab->sdata[0].sym == NULL 4030 && !create_sdata_sym (info, &htab->sdata[0])) 4031 return FALSE; 4032 4033 if (htab->sdata[1].sym == NULL 4034 && !create_sdata_sym (info, &htab->sdata[1])) 4035 return FALSE; 4036 4037 if (h != NULL) 4038 { 4039 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4040 h->non_got_ref = TRUE; 4041 } 4042 break; 4043 4044 case R_PPC_VLE_REL8: 4045 case R_PPC_VLE_REL15: 4046 case R_PPC_VLE_REL24: 4047 case R_PPC_VLE_LO16A: 4048 case R_PPC_VLE_LO16D: 4049 case R_PPC_VLE_HI16A: 4050 case R_PPC_VLE_HI16D: 4051 case R_PPC_VLE_HA16A: 4052 case R_PPC_VLE_HA16D: 4053 break; 4054 4055 case R_PPC_EMB_SDA2REL: 4056 if (info->shared) 4057 { 4058 bad_shared_reloc (abfd, r_type); 4059 return FALSE; 4060 } 4061 if (htab->sdata[1].sym == NULL 4062 && !create_sdata_sym (info, &htab->sdata[1])) 4063 return FALSE; 4064 if (h != NULL) 4065 { 4066 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4067 h->non_got_ref = TRUE; 4068 } 4069 break; 4070 4071 case R_PPC_VLE_SDA21_LO: 4072 case R_PPC_VLE_SDA21: 4073 case R_PPC_EMB_SDA21: 4074 case R_PPC_EMB_RELSDA: 4075 if (info->shared) 4076 { 4077 bad_shared_reloc (abfd, r_type); 4078 return FALSE; 4079 } 4080 if (htab->sdata[0].sym == NULL 4081 && !create_sdata_sym (info, &htab->sdata[0])) 4082 return FALSE; 4083 if (htab->sdata[1].sym == NULL 4084 && !create_sdata_sym (info, &htab->sdata[1])) 4085 return FALSE; 4086 if (h != NULL) 4087 { 4088 ppc_elf_hash_entry (h)->has_sda_refs = TRUE; 4089 h->non_got_ref = TRUE; 4090 } 4091 break; 4092 4093 case R_PPC_EMB_NADDR32: 4094 case R_PPC_EMB_NADDR16: 4095 case R_PPC_EMB_NADDR16_LO: 4096 case R_PPC_EMB_NADDR16_HI: 4097 case R_PPC_EMB_NADDR16_HA: 4098 if (info->shared) 4099 { 4100 bad_shared_reloc (abfd, r_type); 4101 return FALSE; 4102 } 4103 if (h != NULL) 4104 h->non_got_ref = TRUE; 4105 break; 4106 4107 case R_PPC_PLTREL24: 4108 if (h == NULL) 4109 break; 4110 /* Fall through */ 4111 case R_PPC_PLT32: 4112 case R_PPC_PLTREL32: 4113 case R_PPC_PLT16_LO: 4114 case R_PPC_PLT16_HI: 4115 case R_PPC_PLT16_HA: 4116 #ifdef DEBUG 4117 fprintf (stderr, "Reloc requires a PLT entry\n"); 4118 #endif 4119 /* This symbol requires a procedure linkage table entry. We 4120 actually build the entry in finish_dynamic_symbol, 4121 because this might be a case of linking PIC code without 4122 linking in any dynamic objects, in which case we don't 4123 need to generate a procedure linkage table after all. */ 4124 4125 if (h == NULL) 4126 { 4127 /* It does not make sense to have a procedure linkage 4128 table entry for a local symbol. */ 4129 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"), 4130 abfd, sec, rel->r_offset, 4131 ppc_elf_howto_table[r_type]->name); 4132 bfd_set_error (bfd_error_bad_value); 4133 return FALSE; 4134 } 4135 else 4136 { 4137 bfd_vma addend = 0; 4138 4139 if (r_type == R_PPC_PLTREL24) 4140 { 4141 ppc_elf_tdata (abfd)->makes_plt_call = 1; 4142 if (info->shared) 4143 addend = rel->r_addend; 4144 } 4145 h->needs_plt = 1; 4146 if (!update_plt_info (abfd, &h->plt.plist, got2, addend)) 4147 return FALSE; 4148 } 4149 break; 4150 4151 /* The following relocations don't need to propagate the 4152 relocation if linking a shared object since they are 4153 section relative. */ 4154 case R_PPC_SECTOFF: 4155 case R_PPC_SECTOFF_LO: 4156 case R_PPC_SECTOFF_HI: 4157 case R_PPC_SECTOFF_HA: 4158 case R_PPC_DTPREL16: 4159 case R_PPC_DTPREL16_LO: 4160 case R_PPC_DTPREL16_HI: 4161 case R_PPC_DTPREL16_HA: 4162 case R_PPC_TOC16: 4163 break; 4164 4165 case R_PPC_REL16: 4166 case R_PPC_REL16_LO: 4167 case R_PPC_REL16_HI: 4168 case R_PPC_REL16_HA: 4169 ppc_elf_tdata (abfd)->has_rel16 = 1; 4170 break; 4171 4172 /* These are just markers. */ 4173 case R_PPC_TLS: 4174 case R_PPC_EMB_MRKREF: 4175 case R_PPC_NONE: 4176 case R_PPC_max: 4177 case R_PPC_RELAX: 4178 case R_PPC_RELAX_PLT: 4179 case R_PPC_RELAX_PLTREL24: 4180 break; 4181 4182 /* These should only appear in dynamic objects. */ 4183 case R_PPC_COPY: 4184 case R_PPC_GLOB_DAT: 4185 case R_PPC_JMP_SLOT: 4186 case R_PPC_RELATIVE: 4187 case R_PPC_IRELATIVE: 4188 break; 4189 4190 /* These aren't handled yet. We'll report an error later. */ 4191 case R_PPC_ADDR30: 4192 case R_PPC_EMB_RELSEC16: 4193 case R_PPC_EMB_RELST_LO: 4194 case R_PPC_EMB_RELST_HI: 4195 case R_PPC_EMB_RELST_HA: 4196 case R_PPC_EMB_BIT_FLD: 4197 break; 4198 4199 /* This refers only to functions defined in the shared library. */ 4200 case R_PPC_LOCAL24PC: 4201 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) 4202 { 4203 htab->plt_type = PLT_OLD; 4204 htab->old_bfd = abfd; 4205 } 4206 break; 4207 4208 /* This relocation describes the C++ object vtable hierarchy. 4209 Reconstruct it for later use during GC. */ 4210 case R_PPC_GNU_VTINHERIT: 4211 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 4212 return FALSE; 4213 break; 4214 4215 /* This relocation describes which C++ vtable entries are actually 4216 used. Record for later use during GC. */ 4217 case R_PPC_GNU_VTENTRY: 4218 BFD_ASSERT (h != NULL); 4219 if (h != NULL 4220 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 4221 return FALSE; 4222 break; 4223 4224 /* We shouldn't really be seeing these. */ 4225 case R_PPC_TPREL32: 4226 case R_PPC_TPREL16: 4227 case R_PPC_TPREL16_LO: 4228 case R_PPC_TPREL16_HI: 4229 case R_PPC_TPREL16_HA: 4230 if (!info->executable) 4231 info->flags |= DF_STATIC_TLS; 4232 goto dodyn; 4233 4234 /* Nor these. */ 4235 case R_PPC_DTPMOD32: 4236 case R_PPC_DTPREL32: 4237 goto dodyn; 4238 4239 case R_PPC_REL32: 4240 if (h == NULL 4241 && got2 != NULL 4242 && (sec->flags & SEC_CODE) != 0 4243 && info->shared 4244 && htab->plt_type == PLT_UNSET) 4245 { 4246 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before 4247 the start of a function, which assembles to a REL32 4248 reference to .got2. If we detect one of these, then 4249 force the old PLT layout because the linker cannot 4250 reliably deduce the GOT pointer value needed for 4251 PLT call stubs. */ 4252 asection *s; 4253 Elf_Internal_Sym *isym; 4254 4255 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4256 abfd, r_symndx); 4257 if (isym == NULL) 4258 return FALSE; 4259 4260 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4261 if (s == got2) 4262 { 4263 htab->plt_type = PLT_OLD; 4264 htab->old_bfd = abfd; 4265 } 4266 } 4267 if (h == NULL || h == htab->elf.hgot) 4268 break; 4269 /* fall through */ 4270 4271 case R_PPC_ADDR32: 4272 case R_PPC_ADDR16: 4273 case R_PPC_ADDR16_LO: 4274 case R_PPC_ADDR16_HI: 4275 case R_PPC_ADDR16_HA: 4276 case R_PPC_UADDR32: 4277 case R_PPC_UADDR16: 4278 if (h != NULL && !info->shared) 4279 { 4280 /* We may need a plt entry if the symbol turns out to be 4281 a function defined in a dynamic object. */ 4282 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4283 return FALSE; 4284 4285 /* We may need a copy reloc too. */ 4286 h->non_got_ref = 1; 4287 h->pointer_equality_needed = 1; 4288 } 4289 goto dodyn; 4290 4291 case R_PPC_REL24: 4292 case R_PPC_REL14: 4293 case R_PPC_REL14_BRTAKEN: 4294 case R_PPC_REL14_BRNTAKEN: 4295 if (h == NULL) 4296 break; 4297 if (h == htab->elf.hgot) 4298 { 4299 if (htab->plt_type == PLT_UNSET) 4300 { 4301 htab->plt_type = PLT_OLD; 4302 htab->old_bfd = abfd; 4303 } 4304 break; 4305 } 4306 /* fall through */ 4307 4308 case R_PPC_ADDR24: 4309 case R_PPC_ADDR14: 4310 case R_PPC_ADDR14_BRTAKEN: 4311 case R_PPC_ADDR14_BRNTAKEN: 4312 if (h != NULL && !info->shared) 4313 { 4314 /* We may need a plt entry if the symbol turns out to be 4315 a function defined in a dynamic object. */ 4316 h->needs_plt = 1; 4317 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0)) 4318 return FALSE; 4319 break; 4320 } 4321 4322 dodyn: 4323 /* If we are creating a shared library, and this is a reloc 4324 against a global symbol, or a non PC relative reloc 4325 against a local symbol, then we need to copy the reloc 4326 into the shared library. However, if we are linking with 4327 -Bsymbolic, we do not need to copy a reloc against a 4328 global symbol which is defined in an object we are 4329 including in the link (i.e., DEF_REGULAR is set). At 4330 this point we have not seen all the input files, so it is 4331 possible that DEF_REGULAR is not set now but will be set 4332 later (it is never cleared). In case of a weak definition, 4333 DEF_REGULAR may be cleared later by a strong definition in 4334 a shared library. We account for that possibility below by 4335 storing information in the dyn_relocs field of the hash 4336 table entry. A similar situation occurs when creating 4337 shared libraries and symbol visibility changes render the 4338 symbol local. 4339 4340 If on the other hand, we are creating an executable, we 4341 may need to keep relocations for symbols satisfied by a 4342 dynamic library if we manage to avoid copy relocs for the 4343 symbol. */ 4344 if ((info->shared 4345 && (must_be_dyn_reloc (info, r_type) 4346 || (h != NULL 4347 && (! info->symbolic 4348 || h->root.type == bfd_link_hash_defweak 4349 || !h->def_regular)))) 4350 || (ELIMINATE_COPY_RELOCS 4351 && !info->shared 4352 && h != NULL 4353 && (h->root.type == bfd_link_hash_defweak 4354 || !h->def_regular))) 4355 { 4356 struct elf_dyn_relocs *p; 4357 struct elf_dyn_relocs **rel_head; 4358 4359 #ifdef DEBUG 4360 fprintf (stderr, 4361 "ppc_elf_check_relocs needs to " 4362 "create relocation for %s\n", 4363 (h && h->root.root.string 4364 ? h->root.root.string : "<unknown>")); 4365 #endif 4366 if (sreloc == NULL) 4367 { 4368 if (htab->elf.dynobj == NULL) 4369 htab->elf.dynobj = abfd; 4370 4371 sreloc = _bfd_elf_make_dynamic_reloc_section 4372 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE); 4373 4374 if (sreloc == NULL) 4375 return FALSE; 4376 } 4377 4378 /* If this is a global symbol, we count the number of 4379 relocations we need for this symbol. */ 4380 if (h != NULL) 4381 { 4382 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs; 4383 } 4384 else 4385 { 4386 /* Track dynamic relocs needed for local syms too. 4387 We really need local syms available to do this 4388 easily. Oh well. */ 4389 asection *s; 4390 void *vpp; 4391 Elf_Internal_Sym *isym; 4392 4393 isym = bfd_sym_from_r_symndx (&htab->sym_cache, 4394 abfd, r_symndx); 4395 if (isym == NULL) 4396 return FALSE; 4397 4398 s = bfd_section_from_elf_index (abfd, isym->st_shndx); 4399 if (s == NULL) 4400 s = sec; 4401 4402 vpp = &elf_section_data (s)->local_dynrel; 4403 rel_head = (struct elf_dyn_relocs **) vpp; 4404 } 4405 4406 p = *rel_head; 4407 if (p == NULL || p->sec != sec) 4408 { 4409 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 4410 if (p == NULL) 4411 return FALSE; 4412 p->next = *rel_head; 4413 *rel_head = p; 4414 p->sec = sec; 4415 p->count = 0; 4416 p->pc_count = 0; 4417 } 4418 4419 p->count += 1; 4420 if (!must_be_dyn_reloc (info, r_type)) 4421 p->pc_count += 1; 4422 } 4423 4424 break; 4425 } 4426 } 4427 4428 return TRUE; 4429 } 4430 4431 4433 /* Merge object attributes from IBFD into OBFD. Raise an error if 4434 there are conflicting attributes. */ 4435 static bfd_boolean 4436 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd) 4437 { 4438 obj_attribute *in_attr, *in_attrs; 4439 obj_attribute *out_attr, *out_attrs; 4440 4441 if (!elf_known_obj_attributes_proc (obfd)[0].i) 4442 { 4443 /* This is the first object. Copy the attributes. */ 4444 _bfd_elf_copy_obj_attributes (ibfd, obfd); 4445 4446 /* Use the Tag_null value to indicate the attributes have been 4447 initialized. */ 4448 elf_known_obj_attributes_proc (obfd)[0].i = 1; 4449 4450 return TRUE; 4451 } 4452 4453 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU]; 4454 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU]; 4455 4456 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge 4457 non-conflicting ones. */ 4458 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP]; 4459 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP]; 4460 if (in_attr->i != out_attr->i) 4461 { 4462 out_attr->type = 1; 4463 if (out_attr->i == 0) 4464 out_attr->i = in_attr->i; 4465 else if (in_attr->i == 0) 4466 ; 4467 else if (out_attr->i == 1 && in_attr->i == 2) 4468 _bfd_error_handler 4469 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd); 4470 else if (out_attr->i == 1 && in_attr->i == 3) 4471 _bfd_error_handler 4472 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), 4473 obfd, ibfd); 4474 else if (out_attr->i == 3 && in_attr->i == 1) 4475 _bfd_error_handler 4476 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"), 4477 ibfd, obfd); 4478 else if (out_attr->i == 3 && in_attr->i == 2) 4479 _bfd_error_handler 4480 (_("Warning: %B uses soft float, %B uses single-precision hard float"), 4481 ibfd, obfd); 4482 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3)) 4483 _bfd_error_handler 4484 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd); 4485 else if (in_attr->i > 3) 4486 _bfd_error_handler 4487 (_("Warning: %B uses unknown floating point ABI %d"), ibfd, 4488 in_attr->i); 4489 else 4490 _bfd_error_handler 4491 (_("Warning: %B uses unknown floating point ABI %d"), obfd, 4492 out_attr->i); 4493 } 4494 4495 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and 4496 merge non-conflicting ones. */ 4497 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector]; 4498 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector]; 4499 if (in_attr->i != out_attr->i) 4500 { 4501 const char *in_abi = NULL, *out_abi = NULL; 4502 4503 switch (in_attr->i) 4504 { 4505 case 1: in_abi = "generic"; break; 4506 case 2: in_abi = "AltiVec"; break; 4507 case 3: in_abi = "SPE"; break; 4508 } 4509 4510 switch (out_attr->i) 4511 { 4512 case 1: out_abi = "generic"; break; 4513 case 2: out_abi = "AltiVec"; break; 4514 case 3: out_abi = "SPE"; break; 4515 } 4516 4517 out_attr->type = 1; 4518 if (out_attr->i == 0) 4519 out_attr->i = in_attr->i; 4520 else if (in_attr->i == 0) 4521 ; 4522 /* For now, allow generic to transition to AltiVec or SPE 4523 without a warning. If GCC marked files with their stack 4524 alignment and used don't-care markings for files which are 4525 not affected by the vector ABI, we could warn about this 4526 case too. */ 4527 else if (out_attr->i == 1) 4528 out_attr->i = in_attr->i; 4529 else if (in_attr->i == 1) 4530 ; 4531 else if (in_abi == NULL) 4532 _bfd_error_handler 4533 (_("Warning: %B uses unknown vector ABI %d"), ibfd, 4534 in_attr->i); 4535 else if (out_abi == NULL) 4536 _bfd_error_handler 4537 (_("Warning: %B uses unknown vector ABI %d"), obfd, 4538 in_attr->i); 4539 else 4540 _bfd_error_handler 4541 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""), 4542 ibfd, obfd, in_abi, out_abi); 4543 } 4544 4545 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes 4546 and merge non-conflicting ones. */ 4547 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4548 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return]; 4549 if (in_attr->i != out_attr->i) 4550 { 4551 out_attr->type = 1; 4552 if (out_attr->i == 0) 4553 out_attr->i = in_attr->i; 4554 else if (in_attr->i == 0) 4555 ; 4556 else if (out_attr->i == 1 && in_attr->i == 2) 4557 _bfd_error_handler 4558 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd); 4559 else if (out_attr->i == 2 && in_attr->i == 1) 4560 _bfd_error_handler 4561 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd); 4562 else if (in_attr->i > 2) 4563 _bfd_error_handler 4564 (_("Warning: %B uses unknown small structure return convention %d"), ibfd, 4565 in_attr->i); 4566 else 4567 _bfd_error_handler 4568 (_("Warning: %B uses unknown small structure return convention %d"), obfd, 4569 out_attr->i); 4570 } 4571 4572 /* Merge Tag_compatibility attributes and any common GNU ones. */ 4573 _bfd_elf_merge_object_attributes (ibfd, obfd); 4574 4575 return TRUE; 4576 } 4577 4578 /* Merge backend specific data from an object file to the output 4579 object file when linking. */ 4580 4581 static bfd_boolean 4582 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 4583 { 4584 flagword old_flags; 4585 flagword new_flags; 4586 bfd_boolean error; 4587 4588 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd)) 4589 return TRUE; 4590 4591 /* Check if we have the same endianness. */ 4592 if (! _bfd_generic_verify_endian_match (ibfd, obfd)) 4593 return FALSE; 4594 4595 if (!ppc_elf_merge_obj_attributes (ibfd, obfd)) 4596 return FALSE; 4597 4598 new_flags = elf_elfheader (ibfd)->e_flags; 4599 old_flags = elf_elfheader (obfd)->e_flags; 4600 if (!elf_flags_init (obfd)) 4601 { 4602 /* First call, no flags set. */ 4603 elf_flags_init (obfd) = TRUE; 4604 elf_elfheader (obfd)->e_flags = new_flags; 4605 } 4606 4607 /* Compatible flags are ok. */ 4608 else if (new_flags == old_flags) 4609 ; 4610 4611 /* Incompatible flags. */ 4612 else 4613 { 4614 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib 4615 to be linked with either. */ 4616 error = FALSE; 4617 if ((new_flags & EF_PPC_RELOCATABLE) != 0 4618 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) 4619 { 4620 error = TRUE; 4621 (*_bfd_error_handler) 4622 (_("%B: compiled with -mrelocatable and linked with " 4623 "modules compiled normally"), ibfd); 4624 } 4625 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 4626 && (old_flags & EF_PPC_RELOCATABLE) != 0) 4627 { 4628 error = TRUE; 4629 (*_bfd_error_handler) 4630 (_("%B: compiled normally and linked with " 4631 "modules compiled with -mrelocatable"), ibfd); 4632 } 4633 4634 /* The output is -mrelocatable-lib iff both the input files are. */ 4635 if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) 4636 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; 4637 4638 /* The output is -mrelocatable iff it can't be -mrelocatable-lib, 4639 but each input file is either -mrelocatable or -mrelocatable-lib. */ 4640 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) 4641 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) 4642 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) 4643 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; 4644 4645 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if 4646 any module uses it. */ 4647 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); 4648 4649 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4650 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); 4651 4652 /* Warn about any other mismatches. */ 4653 if (new_flags != old_flags) 4654 { 4655 error = TRUE; 4656 (*_bfd_error_handler) 4657 (_("%B: uses different e_flags (0x%lx) fields " 4658 "than previous modules (0x%lx)"), 4659 ibfd, (long) new_flags, (long) old_flags); 4660 } 4661 4662 if (error) 4663 { 4664 bfd_set_error (bfd_error_bad_value); 4665 return FALSE; 4666 } 4667 } 4668 4669 return TRUE; 4670 } 4671 4672 static void 4673 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *contents, 4674 bfd_vma offset, bfd_vma relocation, 4675 split16_format_type split16_format) 4676 4677 { 4678 bfd_vma insn, top5, bottom11; 4679 4680 insn = bfd_get_32 (output_bfd, contents + offset); 4681 top5 = relocation >> 11; 4682 top5 = top5 << (split16_format == split16a_type ? 20 : 16); 4683 bottom11 = relocation & 0x7ff; 4684 insn |= top5; 4685 insn |= bottom11; 4686 bfd_put_32 (output_bfd, insn, contents + offset); 4687 } 4688 4689 4690 /* Choose which PLT scheme to use, and set .plt flags appropriately. 4692 Returns -1 on error, 0 for old PLT, 1 for new PLT. */ 4693 int 4694 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, 4695 struct bfd_link_info *info, 4696 enum ppc_elf_plt_type plt_style, 4697 int emit_stub_syms) 4698 { 4699 struct ppc_elf_link_hash_table *htab; 4700 flagword flags; 4701 4702 htab = ppc_elf_hash_table (info); 4703 4704 htab->emit_stub_syms = emit_stub_syms; 4705 4706 if (htab->plt_type == PLT_UNSET) 4707 { 4708 struct elf_link_hash_entry *h; 4709 4710 if (plt_style == PLT_OLD) 4711 htab->plt_type = PLT_OLD; 4712 else if (info->shared 4713 && htab->elf.dynamic_sections_created 4714 && (h = elf_link_hash_lookup (&htab->elf, "_mcount", 4715 FALSE, FALSE, TRUE)) != NULL 4716 && (h->type == STT_FUNC 4717 || h->needs_plt) 4718 && h->ref_regular 4719 && !(SYMBOL_CALLS_LOCAL (info, h) 4720 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 4721 && h->root.type == bfd_link_hash_undefweak))) 4722 { 4723 /* Profiling of shared libs (and pies) is not supported with 4724 secure plt, because ppc32 does profiling before a 4725 function prologue and a secure plt pic call stubs needs 4726 r30 to be set up. */ 4727 htab->plt_type = PLT_OLD; 4728 } 4729 else 4730 { 4731 bfd *ibfd; 4732 enum ppc_elf_plt_type plt_type = plt_style; 4733 4734 /* Look through the reloc flags left by ppc_elf_check_relocs. 4735 Use the old style bss plt if a file makes plt calls 4736 without using the new relocs, and if ld isn't given 4737 --secure-plt and we never see REL16 relocs. */ 4738 if (plt_type == PLT_UNSET) 4739 plt_type = PLT_OLD; 4740 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next) 4741 if (is_ppc_elf (ibfd)) 4742 { 4743 if (ppc_elf_tdata (ibfd)->has_rel16) 4744 plt_type = PLT_NEW; 4745 else if (ppc_elf_tdata (ibfd)->makes_plt_call) 4746 { 4747 plt_type = PLT_OLD; 4748 htab->old_bfd = ibfd; 4749 break; 4750 } 4751 } 4752 htab->plt_type = plt_type; 4753 } 4754 } 4755 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW) 4756 { 4757 if (htab->old_bfd != NULL) 4758 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"), 4759 htab->old_bfd); 4760 else 4761 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n")); 4762 } 4763 4764 BFD_ASSERT (htab->plt_type != PLT_VXWORKS); 4765 4766 if (htab->plt_type == PLT_NEW) 4767 { 4768 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS 4769 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 4770 4771 /* The new PLT is a loaded section. */ 4772 if (htab->plt != NULL 4773 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags)) 4774 return -1; 4775 4776 /* The new GOT is not executable. */ 4777 if (htab->got != NULL 4778 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags)) 4779 return -1; 4780 } 4781 else 4782 { 4783 /* Stop an unused .glink section from affecting .text alignment. */ 4784 if (htab->glink != NULL 4785 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) 4786 return -1; 4787 } 4788 return htab->plt_type == PLT_NEW; 4789 } 4790 4791 /* Return the section that should be marked against GC for a given 4793 relocation. */ 4794 4795 static asection * 4796 ppc_elf_gc_mark_hook (asection *sec, 4797 struct bfd_link_info *info, 4798 Elf_Internal_Rela *rel, 4799 struct elf_link_hash_entry *h, 4800 Elf_Internal_Sym *sym) 4801 { 4802 if (h != NULL) 4803 switch (ELF32_R_TYPE (rel->r_info)) 4804 { 4805 case R_PPC_GNU_VTINHERIT: 4806 case R_PPC_GNU_VTENTRY: 4807 return NULL; 4808 } 4809 4810 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); 4811 } 4812 4813 /* Update the got, plt and dynamic reloc reference counts for the 4814 section being removed. */ 4815 4816 static bfd_boolean 4817 ppc_elf_gc_sweep_hook (bfd *abfd, 4818 struct bfd_link_info *info, 4819 asection *sec, 4820 const Elf_Internal_Rela *relocs) 4821 { 4822 struct ppc_elf_link_hash_table *htab; 4823 Elf_Internal_Shdr *symtab_hdr; 4824 struct elf_link_hash_entry **sym_hashes; 4825 bfd_signed_vma *local_got_refcounts; 4826 const Elf_Internal_Rela *rel, *relend; 4827 asection *got2; 4828 4829 if (info->relocatable) 4830 return TRUE; 4831 4832 if ((sec->flags & SEC_ALLOC) == 0) 4833 return TRUE; 4834 4835 elf_section_data (sec)->local_dynrel = NULL; 4836 4837 htab = ppc_elf_hash_table (info); 4838 symtab_hdr = &elf_symtab_hdr (abfd); 4839 sym_hashes = elf_sym_hashes (abfd); 4840 local_got_refcounts = elf_local_got_refcounts (abfd); 4841 got2 = bfd_get_section_by_name (abfd, ".got2"); 4842 4843 relend = relocs + sec->reloc_count; 4844 for (rel = relocs; rel < relend; rel++) 4845 { 4846 unsigned long r_symndx; 4847 enum elf_ppc_reloc_type r_type; 4848 struct elf_link_hash_entry *h = NULL; 4849 4850 r_symndx = ELF32_R_SYM (rel->r_info); 4851 if (r_symndx >= symtab_hdr->sh_info) 4852 { 4853 struct elf_dyn_relocs **pp, *p; 4854 struct ppc_elf_link_hash_entry *eh; 4855 4856 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4857 while (h->root.type == bfd_link_hash_indirect 4858 || h->root.type == bfd_link_hash_warning) 4859 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4860 eh = (struct ppc_elf_link_hash_entry *) h; 4861 4862 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 4863 if (p->sec == sec) 4864 { 4865 /* Everything must go for SEC. */ 4866 *pp = p->next; 4867 break; 4868 } 4869 } 4870 4871 r_type = ELF32_R_TYPE (rel->r_info); 4872 if (!htab->is_vxworks 4873 && h == NULL 4874 && local_got_refcounts != NULL 4875 && (!info->shared 4876 || is_branch_reloc (r_type))) 4877 { 4878 struct plt_entry **local_plt = (struct plt_entry **) 4879 (local_got_refcounts + symtab_hdr->sh_info); 4880 char *local_got_tls_masks = (char *) 4881 (local_plt + symtab_hdr->sh_info); 4882 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0) 4883 { 4884 struct plt_entry **ifunc = local_plt + r_symndx; 4885 bfd_vma addend = 0; 4886 struct plt_entry *ent; 4887 4888 if (r_type == R_PPC_PLTREL24 && info->shared) 4889 addend = rel->r_addend; 4890 ent = find_plt_ent (ifunc, got2, addend); 4891 if (ent->plt.refcount > 0) 4892 ent->plt.refcount -= 1; 4893 continue; 4894 } 4895 } 4896 4897 switch (r_type) 4898 { 4899 case R_PPC_GOT_TLSLD16: 4900 case R_PPC_GOT_TLSLD16_LO: 4901 case R_PPC_GOT_TLSLD16_HI: 4902 case R_PPC_GOT_TLSLD16_HA: 4903 case R_PPC_GOT_TLSGD16: 4904 case R_PPC_GOT_TLSGD16_LO: 4905 case R_PPC_GOT_TLSGD16_HI: 4906 case R_PPC_GOT_TLSGD16_HA: 4907 case R_PPC_GOT_TPREL16: 4908 case R_PPC_GOT_TPREL16_LO: 4909 case R_PPC_GOT_TPREL16_HI: 4910 case R_PPC_GOT_TPREL16_HA: 4911 case R_PPC_GOT_DTPREL16: 4912 case R_PPC_GOT_DTPREL16_LO: 4913 case R_PPC_GOT_DTPREL16_HI: 4914 case R_PPC_GOT_DTPREL16_HA: 4915 case R_PPC_GOT16: 4916 case R_PPC_GOT16_LO: 4917 case R_PPC_GOT16_HI: 4918 case R_PPC_GOT16_HA: 4919 if (h != NULL) 4920 { 4921 if (h->got.refcount > 0) 4922 h->got.refcount--; 4923 if (!info->shared) 4924 { 4925 struct plt_entry *ent; 4926 4927 ent = find_plt_ent (&h->plt.plist, NULL, 0); 4928 if (ent != NULL && ent->plt.refcount > 0) 4929 ent->plt.refcount -= 1; 4930 } 4931 } 4932 else if (local_got_refcounts != NULL) 4933 { 4934 if (local_got_refcounts[r_symndx] > 0) 4935 local_got_refcounts[r_symndx]--; 4936 } 4937 break; 4938 4939 case R_PPC_REL24: 4940 case R_PPC_REL14: 4941 case R_PPC_REL14_BRTAKEN: 4942 case R_PPC_REL14_BRNTAKEN: 4943 case R_PPC_REL32: 4944 if (h == NULL || h == htab->elf.hgot) 4945 break; 4946 /* Fall thru */ 4947 4948 case R_PPC_ADDR32: 4949 case R_PPC_ADDR24: 4950 case R_PPC_ADDR16: 4951 case R_PPC_ADDR16_LO: 4952 case R_PPC_ADDR16_HI: 4953 case R_PPC_ADDR16_HA: 4954 case R_PPC_ADDR14: 4955 case R_PPC_ADDR14_BRTAKEN: 4956 case R_PPC_ADDR14_BRNTAKEN: 4957 case R_PPC_UADDR32: 4958 case R_PPC_UADDR16: 4959 if (info->shared) 4960 break; 4961 4962 case R_PPC_PLT32: 4963 case R_PPC_PLTREL24: 4964 case R_PPC_PLTREL32: 4965 case R_PPC_PLT16_LO: 4966 case R_PPC_PLT16_HI: 4967 case R_PPC_PLT16_HA: 4968 if (h != NULL) 4969 { 4970 bfd_vma addend = 0; 4971 struct plt_entry *ent; 4972 4973 if (r_type == R_PPC_PLTREL24 && info->shared) 4974 addend = rel->r_addend; 4975 ent = find_plt_ent (&h->plt.plist, got2, addend); 4976 if (ent != NULL && ent->plt.refcount > 0) 4977 ent->plt.refcount -= 1; 4978 } 4979 break; 4980 4981 default: 4982 break; 4983 } 4984 } 4985 return TRUE; 4986 } 4987 4988 /* Set plt output section type, htab->tls_get_addr, and call the 4990 generic ELF tls_setup function. */ 4991 4992 asection * 4993 ppc_elf_tls_setup (bfd *obfd, 4994 struct bfd_link_info *info, 4995 int no_tls_get_addr_opt) 4996 { 4997 struct ppc_elf_link_hash_table *htab; 4998 4999 htab = ppc_elf_hash_table (info); 5000 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", 5001 FALSE, FALSE, TRUE); 5002 if (!no_tls_get_addr_opt) 5003 { 5004 struct elf_link_hash_entry *opt, *tga; 5005 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", 5006 FALSE, FALSE, TRUE); 5007 if (opt != NULL 5008 && (opt->root.type == bfd_link_hash_defined 5009 || opt->root.type == bfd_link_hash_defweak)) 5010 { 5011 /* If glibc supports an optimized __tls_get_addr call stub, 5012 signalled by the presence of __tls_get_addr_opt, and we'll 5013 be calling __tls_get_addr via a plt call stub, then 5014 make __tls_get_addr point to __tls_get_addr_opt. */ 5015 tga = htab->tls_get_addr; 5016 if (htab->elf.dynamic_sections_created 5017 && tga != NULL 5018 && (tga->type == STT_FUNC 5019 || tga->needs_plt) 5020 && !(SYMBOL_CALLS_LOCAL (info, tga) 5021 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT 5022 && tga->root.type == bfd_link_hash_undefweak))) 5023 { 5024 struct plt_entry *ent; 5025 for (ent = tga->plt.plist; ent != NULL; ent = ent->next) 5026 if (ent->plt.refcount > 0) 5027 break; 5028 if (ent != NULL) 5029 { 5030 tga->root.type = bfd_link_hash_indirect; 5031 tga->root.u.i.link = &opt->root; 5032 ppc_elf_copy_indirect_symbol (info, opt, tga); 5033 if (opt->dynindx != -1) 5034 { 5035 /* Use __tls_get_addr_opt in dynamic relocations. */ 5036 opt->dynindx = -1; 5037 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, 5038 opt->dynstr_index); 5039 if (!bfd_elf_link_record_dynamic_symbol (info, opt)) 5040 return FALSE; 5041 } 5042 htab->tls_get_addr = opt; 5043 } 5044 } 5045 } 5046 else 5047 no_tls_get_addr_opt = TRUE; 5048 } 5049 htab->no_tls_get_addr_opt = no_tls_get_addr_opt; 5050 if (htab->plt_type == PLT_NEW 5051 && htab->plt != NULL 5052 && htab->plt->output_section != NULL) 5053 { 5054 elf_section_type (htab->plt->output_section) = SHT_PROGBITS; 5055 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE; 5056 } 5057 5058 return _bfd_elf_tls_setup (obfd, info); 5059 } 5060 5061 /* Return TRUE iff REL is a branch reloc with a global symbol matching 5062 HASH. */ 5063 5064 static bfd_boolean 5065 branch_reloc_hash_match (const bfd *ibfd, 5066 const Elf_Internal_Rela *rel, 5067 const struct elf_link_hash_entry *hash) 5068 { 5069 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5070 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info); 5071 unsigned int r_symndx = ELF32_R_SYM (rel->r_info); 5072 5073 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) 5074 { 5075 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 5076 struct elf_link_hash_entry *h; 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 if (h == hash) 5083 return TRUE; 5084 } 5085 return FALSE; 5086 } 5087 5088 /* Run through all the TLS relocs looking for optimization 5089 opportunities. */ 5090 5091 bfd_boolean 5092 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, 5093 struct bfd_link_info *info) 5094 { 5095 bfd *ibfd; 5096 asection *sec; 5097 struct ppc_elf_link_hash_table *htab; 5098 int pass; 5099 5100 if (info->relocatable || !info->executable) 5101 return TRUE; 5102 5103 htab = ppc_elf_hash_table (info); 5104 if (htab == NULL) 5105 return FALSE; 5106 5107 /* Make two passes through the relocs. First time check that tls 5108 relocs involved in setting up a tls_get_addr call are indeed 5109 followed by such a call. If they are not, don't do any tls 5110 optimization. On the second pass twiddle tls_mask flags to 5111 notify relocate_section that optimization can be done, and 5112 adjust got and plt refcounts. */ 5113 for (pass = 0; pass < 2; ++pass) 5114 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 5115 { 5116 Elf_Internal_Sym *locsyms = NULL; 5117 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); 5118 asection *got2 = bfd_get_section_by_name (ibfd, ".got2"); 5119 5120 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 5121 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 5122 { 5123 Elf_Internal_Rela *relstart, *rel, *relend; 5124 int expecting_tls_get_addr = 0; 5125 5126 /* Read the relocations. */ 5127 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 5128 info->keep_memory); 5129 if (relstart == NULL) 5130 return FALSE; 5131 5132 relend = relstart + sec->reloc_count; 5133 for (rel = relstart; rel < relend; rel++) 5134 { 5135 enum elf_ppc_reloc_type r_type; 5136 unsigned long r_symndx; 5137 struct elf_link_hash_entry *h = NULL; 5138 char *tls_mask; 5139 char tls_set, tls_clear; 5140 bfd_boolean is_local; 5141 bfd_signed_vma *got_count; 5142 5143 r_symndx = ELF32_R_SYM (rel->r_info); 5144 if (r_symndx >= symtab_hdr->sh_info) 5145 { 5146 struct elf_link_hash_entry **sym_hashes; 5147 5148 sym_hashes = elf_sym_hashes (ibfd); 5149 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 5150 while (h->root.type == bfd_link_hash_indirect 5151 || h->root.type == bfd_link_hash_warning) 5152 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5153 } 5154 5155 is_local = FALSE; 5156 if (h == NULL 5157 || !h->def_dynamic) 5158 is_local = TRUE; 5159 5160 r_type = ELF32_R_TYPE (rel->r_info); 5161 /* If this section has old-style __tls_get_addr calls 5162 without marker relocs, then check that each 5163 __tls_get_addr call reloc is preceded by a reloc 5164 that conceivably belongs to the __tls_get_addr arg 5165 setup insn. If we don't find matching arg setup 5166 relocs, don't do any tls optimization. */ 5167 if (pass == 0 5168 && sec->has_tls_get_addr_call 5169 && h != NULL 5170 && h == htab->tls_get_addr 5171 && !expecting_tls_get_addr 5172 && is_branch_reloc (r_type)) 5173 { 5174 info->callbacks->minfo ("%H __tls_get_addr lost arg, " 5175 "TLS optimization disabled\n", 5176 ibfd, sec, rel->r_offset); 5177 if (elf_section_data (sec)->relocs != relstart) 5178 free (relstart); 5179 return TRUE; 5180 } 5181 5182 expecting_tls_get_addr = 0; 5183 switch (r_type) 5184 { 5185 case R_PPC_GOT_TLSLD16: 5186 case R_PPC_GOT_TLSLD16_LO: 5187 expecting_tls_get_addr = 1; 5188 /* Fall thru */ 5189 5190 case R_PPC_GOT_TLSLD16_HI: 5191 case R_PPC_GOT_TLSLD16_HA: 5192 /* These relocs should never be against a symbol 5193 defined in a shared lib. Leave them alone if 5194 that turns out to be the case. */ 5195 if (!is_local) 5196 continue; 5197 5198 /* LD -> LE */ 5199 tls_set = 0; 5200 tls_clear = TLS_LD; 5201 break; 5202 5203 case R_PPC_GOT_TLSGD16: 5204 case R_PPC_GOT_TLSGD16_LO: 5205 expecting_tls_get_addr = 1; 5206 /* Fall thru */ 5207 5208 case R_PPC_GOT_TLSGD16_HI: 5209 case R_PPC_GOT_TLSGD16_HA: 5210 if (is_local) 5211 /* GD -> LE */ 5212 tls_set = 0; 5213 else 5214 /* GD -> IE */ 5215 tls_set = TLS_TLS | TLS_TPRELGD; 5216 tls_clear = TLS_GD; 5217 break; 5218 5219 case R_PPC_GOT_TPREL16: 5220 case R_PPC_GOT_TPREL16_LO: 5221 case R_PPC_GOT_TPREL16_HI: 5222 case R_PPC_GOT_TPREL16_HA: 5223 if (is_local) 5224 { 5225 /* IE -> LE */ 5226 tls_set = 0; 5227 tls_clear = TLS_TPREL; 5228 break; 5229 } 5230 else 5231 continue; 5232 5233 case R_PPC_TLSGD: 5234 case R_PPC_TLSLD: 5235 expecting_tls_get_addr = 2; 5236 tls_set = 0; 5237 tls_clear = 0; 5238 break; 5239 5240 default: 5241 continue; 5242 } 5243 5244 if (pass == 0) 5245 { 5246 if (!expecting_tls_get_addr 5247 || (expecting_tls_get_addr == 1 5248 && !sec->has_tls_get_addr_call)) 5249 continue; 5250 5251 if (rel + 1 < relend 5252 && branch_reloc_hash_match (ibfd, rel + 1, 5253 htab->tls_get_addr)) 5254 continue; 5255 5256 /* Uh oh, we didn't find the expected call. We 5257 could just mark this symbol to exclude it 5258 from tls optimization but it's safer to skip 5259 the entire optimization. */ 5260 info->callbacks->minfo (_("%H arg lost __tls_get_addr, " 5261 "TLS optimization disabled\n"), 5262 ibfd, sec, rel->r_offset); 5263 if (elf_section_data (sec)->relocs != relstart) 5264 free (relstart); 5265 return TRUE; 5266 } 5267 5268 if (expecting_tls_get_addr) 5269 { 5270 struct plt_entry *ent; 5271 bfd_vma addend = 0; 5272 5273 if (info->shared 5274 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24) 5275 addend = rel[1].r_addend; 5276 ent = find_plt_ent (&htab->tls_get_addr->plt.plist, 5277 got2, addend); 5278 if (ent != NULL && ent->plt.refcount > 0) 5279 ent->plt.refcount -= 1; 5280 5281 if (expecting_tls_get_addr == 2) 5282 continue; 5283 } 5284 5285 if (h != NULL) 5286 { 5287 tls_mask = &ppc_elf_hash_entry (h)->tls_mask; 5288 got_count = &h->got.refcount; 5289 } 5290 else 5291 { 5292 bfd_signed_vma *lgot_refs; 5293 struct plt_entry **local_plt; 5294 char *lgot_masks; 5295 5296 if (locsyms == NULL) 5297 { 5298 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 5299 if (locsyms == NULL) 5300 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 5301 symtab_hdr->sh_info, 5302 0, NULL, NULL, NULL); 5303 if (locsyms == NULL) 5304 { 5305 if (elf_section_data (sec)->relocs != relstart) 5306 free (relstart); 5307 return FALSE; 5308 } 5309 } 5310 lgot_refs = elf_local_got_refcounts (ibfd); 5311 if (lgot_refs == NULL) 5312 abort (); 5313 local_plt = (struct plt_entry **) 5314 (lgot_refs + symtab_hdr->sh_info); 5315 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 5316 tls_mask = &lgot_masks[r_symndx]; 5317 got_count = &lgot_refs[r_symndx]; 5318 } 5319 5320 if (tls_set == 0) 5321 { 5322 /* We managed to get rid of a got entry. */ 5323 if (*got_count > 0) 5324 *got_count -= 1; 5325 } 5326 5327 *tls_mask |= tls_set; 5328 *tls_mask &= ~tls_clear; 5329 } 5330 5331 if (elf_section_data (sec)->relocs != relstart) 5332 free (relstart); 5333 } 5334 5335 if (locsyms != NULL 5336 && (symtab_hdr->contents != (unsigned char *) locsyms)) 5337 { 5338 if (!info->keep_memory) 5339 free (locsyms); 5340 else 5341 symtab_hdr->contents = (unsigned char *) locsyms; 5342 } 5343 } 5344 return TRUE; 5345 } 5346 5347 /* Return true if we have dynamic relocs that apply to read-only sections. */ 5349 5350 static bfd_boolean 5351 readonly_dynrelocs (struct elf_link_hash_entry *h) 5352 { 5353 struct elf_dyn_relocs *p; 5354 5355 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) 5356 { 5357 asection *s = p->sec->output_section; 5358 5359 if (s != NULL 5360 && ((s->flags & (SEC_READONLY | SEC_ALLOC)) 5361 == (SEC_READONLY | SEC_ALLOC))) 5362 return TRUE; 5363 } 5364 return FALSE; 5365 } 5366 5367 /* Adjust a symbol defined by a dynamic object and referenced by a 5368 regular object. The current definition is in some section of the 5369 dynamic object, but we're not including those sections. We have to 5370 change the definition to something the rest of the link can 5371 understand. */ 5372 5373 static bfd_boolean 5374 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 5375 struct elf_link_hash_entry *h) 5376 { 5377 struct ppc_elf_link_hash_table *htab; 5378 asection *s; 5379 5380 #ifdef DEBUG 5381 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", 5382 h->root.root.string); 5383 #endif 5384 5385 /* Make sure we know what is going on here. */ 5386 htab = ppc_elf_hash_table (info); 5387 BFD_ASSERT (htab->elf.dynobj != NULL 5388 && (h->needs_plt 5389 || h->type == STT_GNU_IFUNC 5390 || h->u.weakdef != NULL 5391 || (h->def_dynamic 5392 && h->ref_regular 5393 && !h->def_regular))); 5394 5395 /* Deal with function syms. */ 5396 if (h->type == STT_FUNC 5397 || h->type == STT_GNU_IFUNC 5398 || h->needs_plt) 5399 { 5400 /* Clear procedure linkage table information for any symbol that 5401 won't need a .plt entry. */ 5402 struct plt_entry *ent; 5403 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5404 if (ent->plt.refcount > 0) 5405 break; 5406 if (ent == NULL 5407 || (h->type != STT_GNU_IFUNC 5408 && (SYMBOL_CALLS_LOCAL (info, h) 5409 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 5410 && h->root.type == bfd_link_hash_undefweak)))) 5411 { 5412 /* A PLT entry is not required/allowed when: 5413 5414 1. We are not using ld.so; because then the PLT entry 5415 can't be set up, so we can't use one. In this case, 5416 ppc_elf_adjust_dynamic_symbol won't even be called. 5417 5418 2. GC has rendered the entry unused. 5419 5420 3. We know for certain that a call to this symbol 5421 will go to this object, or will remain undefined. */ 5422 h->plt.plist = NULL; 5423 h->needs_plt = 0; 5424 } 5425 else 5426 { 5427 /* After adjust_dynamic_symbol, non_got_ref set in the 5428 non-shared case means that we have allocated space in 5429 .dynbss for the symbol and thus dyn_relocs for this 5430 symbol should be discarded. 5431 If we get here we know we are making a PLT entry for this 5432 symbol, and in an executable we'd normally resolve 5433 relocations against this symbol to the PLT entry. Allow 5434 dynamic relocs if the reference is weak, and the dynamic 5435 relocs will not cause text relocation. */ 5436 if (!h->ref_regular_nonweak 5437 && h->non_got_ref 5438 && h->type != STT_GNU_IFUNC 5439 && !htab->is_vxworks 5440 && !ppc_elf_hash_entry (h)->has_sda_refs 5441 && !readonly_dynrelocs (h)) 5442 h->non_got_ref = 0; 5443 } 5444 return TRUE; 5445 } 5446 else 5447 h->plt.plist = NULL; 5448 5449 /* If this is a weak symbol, and there is a real definition, the 5450 processor independent code will have arranged for us to see the 5451 real definition first, and we can just use the same value. */ 5452 if (h->u.weakdef != NULL) 5453 { 5454 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined 5455 || h->u.weakdef->root.type == bfd_link_hash_defweak); 5456 h->root.u.def.section = h->u.weakdef->root.u.def.section; 5457 h->root.u.def.value = h->u.weakdef->root.u.def.value; 5458 if (ELIMINATE_COPY_RELOCS) 5459 h->non_got_ref = h->u.weakdef->non_got_ref; 5460 return TRUE; 5461 } 5462 5463 /* This is a reference to a symbol defined by a dynamic object which 5464 is not a function. */ 5465 5466 /* If we are creating a shared library, we must presume that the 5467 only references to the symbol are via the global offset table. 5468 For such cases we need not do anything here; the relocations will 5469 be handled correctly by relocate_section. */ 5470 if (info->shared) 5471 return TRUE; 5472 5473 /* If there are no references to this symbol that do not use the 5474 GOT, we don't need to generate a copy reloc. */ 5475 if (!h->non_got_ref) 5476 return TRUE; 5477 5478 /* If we didn't find any dynamic relocs in read-only sections, then 5479 we'll be keeping the dynamic relocs and avoiding the copy reloc. 5480 We can't do this if there are any small data relocations. This 5481 doesn't work on VxWorks, where we can not have dynamic 5482 relocations (other than copy and jump slot relocations) in an 5483 executable. */ 5484 if (ELIMINATE_COPY_RELOCS 5485 && !ppc_elf_hash_entry (h)->has_sda_refs 5486 && !htab->is_vxworks 5487 && !h->def_regular 5488 && !readonly_dynrelocs (h)) 5489 { 5490 h->non_got_ref = 0; 5491 return TRUE; 5492 } 5493 5494 /* We must allocate the symbol in our .dynbss section, which will 5495 become part of the .bss section of the executable. There will be 5496 an entry for this symbol in the .dynsym section. The dynamic 5497 object will contain position independent code, so all references 5498 from the dynamic object to this symbol will go through the global 5499 offset table. The dynamic linker will use the .dynsym entry to 5500 determine the address it must put in the global offset table, so 5501 both the dynamic object and the regular object will refer to the 5502 same memory location for the variable. 5503 5504 Of course, if the symbol is referenced using SDAREL relocs, we 5505 must instead allocate it in .sbss. */ 5506 5507 if (ppc_elf_hash_entry (h)->has_sda_refs) 5508 s = htab->dynsbss; 5509 else 5510 s = htab->dynbss; 5511 BFD_ASSERT (s != NULL); 5512 5513 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to 5514 copy the initial value out of the dynamic object and into the 5515 runtime process image. We need to remember the offset into the 5516 .rela.bss section we are going to use. */ 5517 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) 5518 { 5519 asection *srel; 5520 5521 if (ppc_elf_hash_entry (h)->has_sda_refs) 5522 srel = htab->relsbss; 5523 else 5524 srel = htab->relbss; 5525 BFD_ASSERT (srel != NULL); 5526 srel->size += sizeof (Elf32_External_Rela); 5527 h->needs_copy = 1; 5528 } 5529 5530 return _bfd_elf_adjust_dynamic_copy (h, s); 5531 } 5532 5533 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is 5535 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0, 5536 specifying the addend on the plt relocation. For -fpic code, the sym 5537 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC 5538 xxxxxxxx.got2.plt_pic32.<callee>. */ 5539 5540 static bfd_boolean 5541 add_stub_sym (struct plt_entry *ent, 5542 struct elf_link_hash_entry *h, 5543 struct bfd_link_info *info) 5544 { 5545 struct elf_link_hash_entry *sh; 5546 size_t len1, len2, len3; 5547 char *name; 5548 const char *stub; 5549 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 5550 5551 if (info->shared) 5552 stub = ".plt_pic32."; 5553 else 5554 stub = ".plt_call32."; 5555 5556 len1 = strlen (h->root.root.string); 5557 len2 = strlen (stub); 5558 len3 = 0; 5559 if (ent->sec) 5560 len3 = strlen (ent->sec->name); 5561 name = bfd_malloc (len1 + len2 + len3 + 9); 5562 if (name == NULL) 5563 return FALSE; 5564 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff); 5565 if (ent->sec) 5566 memcpy (name + 8, ent->sec->name, len3); 5567 memcpy (name + 8 + len3, stub, len2); 5568 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1); 5569 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE); 5570 if (sh == NULL) 5571 return FALSE; 5572 if (sh->root.type == bfd_link_hash_new) 5573 { 5574 sh->root.type = bfd_link_hash_defined; 5575 sh->root.u.def.section = htab->glink; 5576 sh->root.u.def.value = ent->glink_offset; 5577 sh->ref_regular = 1; 5578 sh->def_regular = 1; 5579 sh->ref_regular_nonweak = 1; 5580 sh->forced_local = 1; 5581 sh->non_elf = 0; 5582 } 5583 return TRUE; 5584 } 5585 5586 /* Allocate NEED contiguous space in .got, and return the offset. 5587 Handles allocation of the got header when crossing 32k. */ 5588 5589 static bfd_vma 5590 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) 5591 { 5592 bfd_vma where; 5593 unsigned int max_before_header; 5594 5595 if (htab->plt_type == PLT_VXWORKS) 5596 { 5597 where = htab->got->size; 5598 htab->got->size += need; 5599 } 5600 else 5601 { 5602 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; 5603 if (need <= htab->got_gap) 5604 { 5605 where = max_before_header - htab->got_gap; 5606 htab->got_gap -= need; 5607 } 5608 else 5609 { 5610 if (htab->got->size + need > max_before_header 5611 && htab->got->size <= max_before_header) 5612 { 5613 htab->got_gap = max_before_header - htab->got->size; 5614 htab->got->size = max_before_header + htab->got_header_size; 5615 } 5616 where = htab->got->size; 5617 htab->got->size += need; 5618 } 5619 } 5620 return where; 5621 } 5622 5623 /* Allocate space in associated reloc sections for dynamic relocs. */ 5624 5625 static bfd_boolean 5626 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 5627 { 5628 struct bfd_link_info *info = inf; 5629 struct ppc_elf_link_hash_entry *eh; 5630 struct ppc_elf_link_hash_table *htab; 5631 struct elf_dyn_relocs *p; 5632 5633 if (h->root.type == bfd_link_hash_indirect) 5634 return TRUE; 5635 5636 htab = ppc_elf_hash_table (info); 5637 if (htab->elf.dynamic_sections_created 5638 || h->type == STT_GNU_IFUNC) 5639 { 5640 struct plt_entry *ent; 5641 bfd_boolean doneone = FALSE; 5642 bfd_vma plt_offset = 0, glink_offset = 0; 5643 bfd_boolean dyn; 5644 5645 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 5646 if (ent->plt.refcount > 0) 5647 { 5648 /* Make sure this symbol is output as a dynamic symbol. */ 5649 if (h->dynindx == -1 5650 && !h->forced_local 5651 && !h->def_regular 5652 && htab->elf.dynamic_sections_created) 5653 { 5654 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 5655 return FALSE; 5656 } 5657 5658 dyn = htab->elf.dynamic_sections_created; 5659 if (info->shared 5660 || h->type == STT_GNU_IFUNC 5661 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) 5662 { 5663 asection *s = htab->plt; 5664 if (!dyn || h->dynindx == -1) 5665 s = htab->iplt; 5666 5667 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1) 5668 { 5669 if (!doneone) 5670 { 5671 plt_offset = s->size; 5672 s->size += 4; 5673 } 5674 ent->plt.offset = plt_offset; 5675 5676 s = htab->glink; 5677 if (!doneone || info->shared) 5678 { 5679 glink_offset = s->size; 5680 s->size += GLINK_ENTRY_SIZE; 5681 if (h == htab->tls_get_addr 5682 && !htab->no_tls_get_addr_opt) 5683 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE; 5684 } 5685 if (!doneone 5686 && !info->shared 5687 && h->def_dynamic 5688 && !h->def_regular) 5689 { 5690 h->root.u.def.section = s; 5691 h->root.u.def.value = glink_offset; 5692 } 5693 ent->glink_offset = glink_offset; 5694 5695 if (htab->emit_stub_syms 5696 && !add_stub_sym (ent, h, info)) 5697 return FALSE; 5698 } 5699 else 5700 { 5701 if (!doneone) 5702 { 5703 /* If this is the first .plt entry, make room 5704 for the special first entry. */ 5705 if (s->size == 0) 5706 s->size += htab->plt_initial_entry_size; 5707 5708 /* The PowerPC PLT is actually composed of two 5709 parts, the first part is 2 words (for a load 5710 and a jump), and then there is a remaining 5711 word available at the end. */ 5712 plt_offset = (htab->plt_initial_entry_size 5713 + (htab->plt_slot_size 5714 * ((s->size 5715 - htab->plt_initial_entry_size) 5716 / htab->plt_entry_size))); 5717 5718 /* If this symbol is not defined in a regular 5719 file, and we are not generating a shared 5720 library, then set the symbol to this location 5721 in the .plt. This is to avoid text 5722 relocations, and is required to make 5723 function pointers compare as equal between 5724 the normal executable and the shared library. */ 5725 if (! info->shared 5726 && h->def_dynamic 5727 && !h->def_regular) 5728 { 5729 h->root.u.def.section = s; 5730 h->root.u.def.value = plt_offset; 5731 } 5732 5733 /* Make room for this entry. */ 5734 s->size += htab->plt_entry_size; 5735 /* After the 8192nd entry, room for two entries 5736 is allocated. */ 5737 if (htab->plt_type == PLT_OLD 5738 && (s->size - htab->plt_initial_entry_size) 5739 / htab->plt_entry_size 5740 > PLT_NUM_SINGLE_ENTRIES) 5741 s->size += htab->plt_entry_size; 5742 } 5743 ent->plt.offset = plt_offset; 5744 } 5745 5746 /* We also need to make an entry in the .rela.plt section. */ 5747 if (!doneone) 5748 { 5749 if (!htab->elf.dynamic_sections_created 5750 || h->dynindx == -1) 5751 htab->reliplt->size += sizeof (Elf32_External_Rela); 5752 else 5753 { 5754 htab->relplt->size += sizeof (Elf32_External_Rela); 5755 5756 if (htab->plt_type == PLT_VXWORKS) 5757 { 5758 /* Allocate space for the unloaded relocations. */ 5759 if (!info->shared 5760 && htab->elf.dynamic_sections_created) 5761 { 5762 if (ent->plt.offset 5763 == (bfd_vma) htab->plt_initial_entry_size) 5764 { 5765 htab->srelplt2->size 5766 += (sizeof (Elf32_External_Rela) 5767 * VXWORKS_PLTRESOLVE_RELOCS); 5768 } 5769 5770 htab->srelplt2->size 5771 += (sizeof (Elf32_External_Rela) 5772 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS); 5773 } 5774 5775 /* Every PLT entry has an associated GOT entry in 5776 .got.plt. */ 5777 htab->sgotplt->size += 4; 5778 } 5779 } 5780 doneone = TRUE; 5781 } 5782 } 5783 else 5784 ent->plt.offset = (bfd_vma) -1; 5785 } 5786 else 5787 ent->plt.offset = (bfd_vma) -1; 5788 5789 if (!doneone) 5790 { 5791 h->plt.plist = NULL; 5792 h->needs_plt = 0; 5793 } 5794 } 5795 else 5796 { 5797 h->plt.plist = NULL; 5798 h->needs_plt = 0; 5799 } 5800 5801 eh = (struct ppc_elf_link_hash_entry *) h; 5802 if (eh->elf.got.refcount > 0) 5803 { 5804 bfd_boolean dyn; 5805 unsigned int need; 5806 5807 /* Make sure this symbol is output as a dynamic symbol. */ 5808 if (eh->elf.dynindx == -1 5809 && !eh->elf.forced_local 5810 && eh->elf.type != STT_GNU_IFUNC 5811 && htab->elf.dynamic_sections_created) 5812 { 5813 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) 5814 return FALSE; 5815 } 5816 5817 need = 0; 5818 if ((eh->tls_mask & TLS_TLS) != 0) 5819 { 5820 if ((eh->tls_mask & TLS_LD) != 0) 5821 { 5822 if (!eh->elf.def_dynamic) 5823 /* We'll just use htab->tlsld_got.offset. This should 5824 always be the case. It's a little odd if we have 5825 a local dynamic reloc against a non-local symbol. */ 5826 htab->tlsld_got.refcount += 1; 5827 else 5828 need += 8; 5829 } 5830 if ((eh->tls_mask & TLS_GD) != 0) 5831 need += 8; 5832 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) 5833 need += 4; 5834 if ((eh->tls_mask & TLS_DTPREL) != 0) 5835 need += 4; 5836 } 5837 else 5838 need += 4; 5839 if (need == 0) 5840 eh->elf.got.offset = (bfd_vma) -1; 5841 else 5842 { 5843 eh->elf.got.offset = allocate_got (htab, need); 5844 dyn = htab->elf.dynamic_sections_created; 5845 if ((info->shared 5846 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) 5847 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT 5848 || eh->elf.root.type != bfd_link_hash_undefweak)) 5849 { 5850 asection *rsec = htab->relgot; 5851 /* All the entries we allocated need relocs. 5852 Except LD only needs one. */ 5853 if ((eh->tls_mask & TLS_LD) != 0 5854 && eh->elf.def_dynamic) 5855 need -= 4; 5856 rsec->size += need * (sizeof (Elf32_External_Rela) / 4); 5857 } 5858 } 5859 } 5860 else 5861 eh->elf.got.offset = (bfd_vma) -1; 5862 5863 if (eh->dyn_relocs == NULL 5864 || !htab->elf.dynamic_sections_created) 5865 return TRUE; 5866 5867 /* In the shared -Bsymbolic case, discard space allocated for 5868 dynamic pc-relative relocs against symbols which turn out to be 5869 defined in regular objects. For the normal shared case, discard 5870 space for relocs that have become local due to symbol visibility 5871 changes. */ 5872 5873 if (info->shared) 5874 { 5875 /* Relocs that use pc_count are those that appear on a call insn, 5876 or certain REL relocs (see must_be_dyn_reloc) that can be 5877 generated via assembly. We want calls to protected symbols to 5878 resolve directly to the function rather than going via the plt. 5879 If people want function pointer comparisons to work as expected 5880 then they should avoid writing weird assembly. */ 5881 if (SYMBOL_CALLS_LOCAL (info, h)) 5882 { 5883 struct elf_dyn_relocs **pp; 5884 5885 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 5886 { 5887 p->count -= p->pc_count; 5888 p->pc_count = 0; 5889 if (p->count == 0) 5890 *pp = p->next; 5891 else 5892 pp = &p->next; 5893 } 5894 } 5895 5896 if (htab->is_vxworks) 5897 { 5898 struct elf_dyn_relocs **pp; 5899 5900 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 5901 { 5902 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) 5903 *pp = p->next; 5904 else 5905 pp = &p->next; 5906 } 5907 } 5908 5909 /* Discard relocs on undefined symbols that must be local. */ 5910 if (eh->dyn_relocs != NULL 5911 && h->root.type == bfd_link_hash_undefined 5912 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 5913 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 5914 eh->dyn_relocs = NULL; 5915 5916 /* Also discard relocs on undefined weak syms with non-default 5917 visibility. */ 5918 if (eh->dyn_relocs != NULL 5919 && h->root.type == bfd_link_hash_undefweak) 5920 { 5921 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) 5922 eh->dyn_relocs = NULL; 5923 5924 /* Make sure undefined weak symbols are output as a dynamic 5925 symbol in PIEs. */ 5926 else if (h->dynindx == -1 5927 && !h->forced_local 5928 && !h->def_regular) 5929 { 5930 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 5931 return FALSE; 5932 } 5933 } 5934 } 5935 else if (ELIMINATE_COPY_RELOCS) 5936 { 5937 /* For the non-shared case, discard space for relocs against 5938 symbols which turn out to need copy relocs or are not 5939 dynamic. */ 5940 5941 if (!h->non_got_ref 5942 && !h->def_regular) 5943 { 5944 /* Make sure this symbol is output as a dynamic symbol. 5945 Undefined weak syms won't yet be marked as dynamic. */ 5946 if (h->dynindx == -1 5947 && !h->forced_local) 5948 { 5949 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 5950 return FALSE; 5951 } 5952 5953 /* If that succeeded, we know we'll be keeping all the 5954 relocs. */ 5955 if (h->dynindx != -1) 5956 goto keep; 5957 } 5958 5959 eh->dyn_relocs = NULL; 5960 5961 keep: ; 5962 } 5963 5964 /* Finally, allocate space. */ 5965 for (p = eh->dyn_relocs; p != NULL; p = p->next) 5966 { 5967 asection *sreloc = elf_section_data (p->sec)->sreloc; 5968 if (!htab->elf.dynamic_sections_created) 5969 sreloc = htab->reliplt; 5970 sreloc->size += p->count * sizeof (Elf32_External_Rela); 5971 } 5972 5973 return TRUE; 5974 } 5975 5976 /* Set DF_TEXTREL if we find any dynamic relocs that apply to 5977 read-only sections. */ 5978 5979 static bfd_boolean 5980 maybe_set_textrel (struct elf_link_hash_entry *h, void *info) 5981 { 5982 if (h->root.type == bfd_link_hash_indirect) 5983 return TRUE; 5984 5985 if (readonly_dynrelocs (h)) 5986 { 5987 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; 5988 5989 /* Not an error, just cut short the traversal. */ 5990 return FALSE; 5991 } 5992 return TRUE; 5993 } 5994 5995 static const unsigned char glink_eh_frame_cie[] = 5996 { 5997 0, 0, 0, 16, /* length. */ 5998 0, 0, 0, 0, /* id. */ 5999 1, /* CIE version. */ 6000 'z', 'R', 0, /* Augmentation string. */ 6001 4, /* Code alignment. */ 6002 0x7c, /* Data alignment. */ 6003 65, /* RA reg. */ 6004 1, /* Augmentation size. */ 6005 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ 6006 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ 6007 }; 6008 6009 /* Set the sizes of the dynamic sections. */ 6010 6011 static bfd_boolean 6012 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 6013 struct bfd_link_info *info) 6014 { 6015 struct ppc_elf_link_hash_table *htab; 6016 asection *s; 6017 bfd_boolean relocs; 6018 bfd *ibfd; 6019 6020 #ifdef DEBUG 6021 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); 6022 #endif 6023 6024 htab = ppc_elf_hash_table (info); 6025 BFD_ASSERT (htab->elf.dynobj != NULL); 6026 6027 if (elf_hash_table (info)->dynamic_sections_created) 6028 { 6029 /* Set the contents of the .interp section to the interpreter. */ 6030 if (info->executable) 6031 { 6032 s = bfd_get_linker_section (htab->elf.dynobj, ".interp"); 6033 BFD_ASSERT (s != NULL); 6034 s->size = sizeof ELF_DYNAMIC_INTERPRETER; 6035 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 6036 } 6037 } 6038 6039 if (htab->plt_type == PLT_OLD) 6040 htab->got_header_size = 16; 6041 else if (htab->plt_type == PLT_NEW) 6042 htab->got_header_size = 12; 6043 6044 /* Set up .got offsets for local syms, and space for local dynamic 6045 relocs. */ 6046 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 6047 { 6048 bfd_signed_vma *local_got; 6049 bfd_signed_vma *end_local_got; 6050 struct plt_entry **local_plt; 6051 struct plt_entry **end_local_plt; 6052 char *lgot_masks; 6053 bfd_size_type locsymcount; 6054 Elf_Internal_Shdr *symtab_hdr; 6055 6056 if (!is_ppc_elf (ibfd)) 6057 continue; 6058 6059 for (s = ibfd->sections; s != NULL; s = s->next) 6060 { 6061 struct elf_dyn_relocs *p; 6062 6063 for (p = ((struct elf_dyn_relocs *) 6064 elf_section_data (s)->local_dynrel); 6065 p != NULL; 6066 p = p->next) 6067 { 6068 if (!bfd_is_abs_section (p->sec) 6069 && bfd_is_abs_section (p->sec->output_section)) 6070 { 6071 /* Input section has been discarded, either because 6072 it is a copy of a linkonce section or due to 6073 linker script /DISCARD/, so we'll be discarding 6074 the relocs too. */ 6075 } 6076 else if (htab->is_vxworks 6077 && strcmp (p->sec->output_section->name, 6078 ".tls_vars") == 0) 6079 { 6080 /* Relocations in vxworks .tls_vars sections are 6081 handled specially by the loader. */ 6082 } 6083 else if (p->count != 0) 6084 { 6085 asection *sreloc = elf_section_data (p->sec)->sreloc; 6086 if (!htab->elf.dynamic_sections_created) 6087 sreloc = htab->reliplt; 6088 sreloc->size += p->count * sizeof (Elf32_External_Rela); 6089 if ((p->sec->output_section->flags 6090 & (SEC_READONLY | SEC_ALLOC)) 6091 == (SEC_READONLY | SEC_ALLOC)) 6092 info->flags |= DF_TEXTREL; 6093 } 6094 } 6095 } 6096 6097 local_got = elf_local_got_refcounts (ibfd); 6098 if (!local_got) 6099 continue; 6100 6101 symtab_hdr = &elf_symtab_hdr (ibfd); 6102 locsymcount = symtab_hdr->sh_info; 6103 end_local_got = local_got + locsymcount; 6104 local_plt = (struct plt_entry **) end_local_got; 6105 end_local_plt = local_plt + locsymcount; 6106 lgot_masks = (char *) end_local_plt; 6107 6108 for (; local_got < end_local_got; ++local_got, ++lgot_masks) 6109 if (*local_got > 0) 6110 { 6111 unsigned int need = 0; 6112 if ((*lgot_masks & TLS_TLS) != 0) 6113 { 6114 if ((*lgot_masks & TLS_GD) != 0) 6115 need += 8; 6116 if ((*lgot_masks & TLS_LD) != 0) 6117 htab->tlsld_got.refcount += 1; 6118 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) 6119 need += 4; 6120 if ((*lgot_masks & TLS_DTPREL) != 0) 6121 need += 4; 6122 } 6123 else 6124 need += 4; 6125 if (need == 0) 6126 *local_got = (bfd_vma) -1; 6127 else 6128 { 6129 *local_got = allocate_got (htab, need); 6130 if (info->shared) 6131 htab->relgot->size += (need 6132 * (sizeof (Elf32_External_Rela) / 4)); 6133 } 6134 } 6135 else 6136 *local_got = (bfd_vma) -1; 6137 6138 if (htab->is_vxworks) 6139 continue; 6140 6141 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */ 6142 for (; local_plt < end_local_plt; ++local_plt) 6143 { 6144 struct plt_entry *ent; 6145 bfd_boolean doneone = FALSE; 6146 bfd_vma plt_offset = 0, glink_offset = 0; 6147 6148 for (ent = *local_plt; ent != NULL; ent = ent->next) 6149 if (ent->plt.refcount > 0) 6150 { 6151 s = htab->iplt; 6152 6153 if (!doneone) 6154 { 6155 plt_offset = s->size; 6156 s->size += 4; 6157 } 6158 ent->plt.offset = plt_offset; 6159 6160 s = htab->glink; 6161 if (!doneone || info->shared) 6162 { 6163 glink_offset = s->size; 6164 s->size += GLINK_ENTRY_SIZE; 6165 } 6166 ent->glink_offset = glink_offset; 6167 6168 if (!doneone) 6169 { 6170 htab->reliplt->size += sizeof (Elf32_External_Rela); 6171 doneone = TRUE; 6172 } 6173 } 6174 else 6175 ent->plt.offset = (bfd_vma) -1; 6176 } 6177 } 6178 6179 /* Allocate space for global sym dynamic relocs. */ 6180 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); 6181 6182 if (htab->tlsld_got.refcount > 0) 6183 { 6184 htab->tlsld_got.offset = allocate_got (htab, 8); 6185 if (info->shared) 6186 htab->relgot->size += sizeof (Elf32_External_Rela); 6187 } 6188 else 6189 htab->tlsld_got.offset = (bfd_vma) -1; 6190 6191 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) 6192 { 6193 unsigned int g_o_t = 32768; 6194 6195 /* If we haven't allocated the header, do so now. When we get here, 6196 for old plt/got the got size will be 0 to 32764 (not allocated), 6197 or 32780 to 65536 (header allocated). For new plt/got, the 6198 corresponding ranges are 0 to 32768 and 32780 to 65536. */ 6199 if (htab->got->size <= 32768) 6200 { 6201 g_o_t = htab->got->size; 6202 if (htab->plt_type == PLT_OLD) 6203 g_o_t += 4; 6204 htab->got->size += htab->got_header_size; 6205 } 6206 6207 htab->elf.hgot->root.u.def.value = g_o_t; 6208 } 6209 if (info->shared) 6210 { 6211 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 6212 if (sda != NULL 6213 && !(sda->root.type == bfd_link_hash_defined 6214 || sda->root.type == bfd_link_hash_defweak)) 6215 { 6216 sda->root.type = bfd_link_hash_defined; 6217 sda->root.u.def.section = htab->elf.hgot->root.u.def.section; 6218 sda->root.u.def.value = htab->elf.hgot->root.u.def.value; 6219 } 6220 } 6221 6222 if (htab->glink != NULL 6223 && htab->glink->size != 0 6224 && htab->elf.dynamic_sections_created) 6225 { 6226 htab->glink_pltresolve = htab->glink->size; 6227 /* Space for the branch table. */ 6228 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4; 6229 /* Pad out to align the start of PLTresolve. */ 6230 htab->glink->size += -htab->glink->size & 15; 6231 htab->glink->size += GLINK_PLTRESOLVE; 6232 6233 if (htab->emit_stub_syms) 6234 { 6235 struct elf_link_hash_entry *sh; 6236 sh = elf_link_hash_lookup (&htab->elf, "__glink", 6237 TRUE, FALSE, FALSE); 6238 if (sh == NULL) 6239 return FALSE; 6240 if (sh->root.type == bfd_link_hash_new) 6241 { 6242 sh->root.type = bfd_link_hash_defined; 6243 sh->root.u.def.section = htab->glink; 6244 sh->root.u.def.value = htab->glink_pltresolve; 6245 sh->ref_regular = 1; 6246 sh->def_regular = 1; 6247 sh->ref_regular_nonweak = 1; 6248 sh->forced_local = 1; 6249 sh->non_elf = 0; 6250 } 6251 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", 6252 TRUE, FALSE, FALSE); 6253 if (sh == NULL) 6254 return FALSE; 6255 if (sh->root.type == bfd_link_hash_new) 6256 { 6257 sh->root.type = bfd_link_hash_defined; 6258 sh->root.u.def.section = htab->glink; 6259 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE; 6260 sh->ref_regular = 1; 6261 sh->def_regular = 1; 6262 sh->ref_regular_nonweak = 1; 6263 sh->forced_local = 1; 6264 sh->non_elf = 0; 6265 } 6266 } 6267 } 6268 6269 if (htab->glink != NULL 6270 && htab->glink->size != 0 6271 && htab->glink_eh_frame != NULL 6272 && !bfd_is_abs_section (htab->glink_eh_frame->output_section) 6273 && _bfd_elf_eh_frame_present (info)) 6274 { 6275 s = htab->glink_eh_frame; 6276 s->size = sizeof (glink_eh_frame_cie) + 20; 6277 if (info->shared) 6278 { 6279 s->size += 4; 6280 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256) 6281 s->size += 4; 6282 } 6283 } 6284 6285 /* We've now determined the sizes of the various dynamic sections. 6286 Allocate memory for them. */ 6287 relocs = FALSE; 6288 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) 6289 { 6290 bfd_boolean strip_section = TRUE; 6291 6292 if ((s->flags & SEC_LINKER_CREATED) == 0) 6293 continue; 6294 6295 if (s == htab->plt 6296 || s == htab->got) 6297 { 6298 /* We'd like to strip these sections if they aren't needed, but if 6299 we've exported dynamic symbols from them we must leave them. 6300 It's too late to tell BFD to get rid of the symbols. */ 6301 if (htab->elf.hplt != NULL) 6302 strip_section = FALSE; 6303 /* Strip this section if we don't need it; see the 6304 comment below. */ 6305 } 6306 else if (s == htab->iplt 6307 || s == htab->glink 6308 || s == htab->glink_eh_frame 6309 || s == htab->sgotplt 6310 || s == htab->sbss 6311 || s == htab->dynbss 6312 || s == htab->dynsbss 6313 || s == htab->sdata[0].section 6314 || s == htab->sdata[1].section) 6315 { 6316 /* Strip these too. */ 6317 } 6318 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s), 6319 ".rela")) 6320 { 6321 if (s->size != 0) 6322 { 6323 /* Remember whether there are any relocation sections. */ 6324 relocs = TRUE; 6325 6326 /* We use the reloc_count field as a counter if we need 6327 to copy relocs into the output file. */ 6328 s->reloc_count = 0; 6329 } 6330 } 6331 else 6332 { 6333 /* It's not one of our sections, so don't allocate space. */ 6334 continue; 6335 } 6336 6337 if (s->size == 0 && strip_section) 6338 { 6339 /* If we don't need this section, strip it from the 6340 output file. This is mostly to handle .rela.bss and 6341 .rela.plt. We must create both sections in 6342 create_dynamic_sections, because they must be created 6343 before the linker maps input sections to output 6344 sections. The linker does that before 6345 adjust_dynamic_symbol is called, and it is that 6346 function which decides whether anything needs to go 6347 into these sections. */ 6348 s->flags |= SEC_EXCLUDE; 6349 continue; 6350 } 6351 6352 if ((s->flags & SEC_HAS_CONTENTS) == 0) 6353 continue; 6354 6355 /* Allocate memory for the section contents. */ 6356 s->contents = bfd_zalloc (htab->elf.dynobj, s->size); 6357 if (s->contents == NULL) 6358 return FALSE; 6359 } 6360 6361 if (htab->elf.dynamic_sections_created) 6362 { 6363 /* Add some entries to the .dynamic section. We fill in the 6364 values later, in ppc_elf_finish_dynamic_sections, but we 6365 must add the entries now so that we get the correct size for 6366 the .dynamic section. The DT_DEBUG entry is filled in by the 6367 dynamic linker and used by the debugger. */ 6368 #define add_dynamic_entry(TAG, VAL) \ 6369 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 6370 6371 if (info->executable) 6372 { 6373 if (!add_dynamic_entry (DT_DEBUG, 0)) 6374 return FALSE; 6375 } 6376 6377 if (htab->plt != NULL && htab->plt->size != 0) 6378 { 6379 if (!add_dynamic_entry (DT_PLTGOT, 0) 6380 || !add_dynamic_entry (DT_PLTRELSZ, 0) 6381 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 6382 || !add_dynamic_entry (DT_JMPREL, 0)) 6383 return FALSE; 6384 } 6385 6386 if (htab->glink != NULL && htab->glink->size != 0) 6387 { 6388 if (!add_dynamic_entry (DT_PPC_GOT, 0)) 6389 return FALSE; 6390 if (!htab->no_tls_get_addr_opt 6391 && htab->tls_get_addr != NULL 6392 && htab->tls_get_addr->plt.plist != NULL 6393 && !add_dynamic_entry (DT_PPC_TLSOPT, 0)) 6394 return FALSE; 6395 } 6396 6397 if (relocs) 6398 { 6399 if (!add_dynamic_entry (DT_RELA, 0) 6400 || !add_dynamic_entry (DT_RELASZ, 0) 6401 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) 6402 return FALSE; 6403 } 6404 6405 /* If any dynamic relocs apply to a read-only section, then we 6406 need a DT_TEXTREL entry. */ 6407 if ((info->flags & DF_TEXTREL) == 0) 6408 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel, 6409 info); 6410 6411 if ((info->flags & DF_TEXTREL) != 0) 6412 { 6413 if (!add_dynamic_entry (DT_TEXTREL, 0)) 6414 return FALSE; 6415 } 6416 if (htab->is_vxworks 6417 && !elf_vxworks_add_dynamic_entries (output_bfd, info)) 6418 return FALSE; 6419 } 6420 #undef add_dynamic_entry 6421 6422 if (htab->glink_eh_frame != NULL 6423 && htab->glink_eh_frame->contents != NULL) 6424 { 6425 unsigned char *p = htab->glink_eh_frame->contents; 6426 bfd_vma val; 6427 6428 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); 6429 /* CIE length (rewrite in case little-endian). */ 6430 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p); 6431 p += sizeof (glink_eh_frame_cie); 6432 /* FDE length. */ 6433 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie); 6434 bfd_put_32 (htab->elf.dynobj, val, p); 6435 p += 4; 6436 /* CIE pointer. */ 6437 val = p - htab->glink_eh_frame->contents; 6438 bfd_put_32 (htab->elf.dynobj, val, p); 6439 p += 4; 6440 /* Offset to .glink. Set later. */ 6441 p += 4; 6442 /* .glink size. */ 6443 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p); 6444 p += 4; 6445 /* Augmentation. */ 6446 p += 1; 6447 6448 if (info->shared 6449 && htab->elf.dynamic_sections_created) 6450 { 6451 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2; 6452 if (adv < 64) 6453 *p++ = DW_CFA_advance_loc + adv; 6454 else if (adv < 256) 6455 { 6456 *p++ = DW_CFA_advance_loc1; 6457 *p++ = adv; 6458 } 6459 else if (adv < 65536) 6460 { 6461 *p++ = DW_CFA_advance_loc2; 6462 bfd_put_16 (htab->elf.dynobj, adv, p); 6463 p += 2; 6464 } 6465 else 6466 { 6467 *p++ = DW_CFA_advance_loc4; 6468 bfd_put_32 (htab->elf.dynobj, adv, p); 6469 p += 4; 6470 } 6471 *p++ = DW_CFA_register; 6472 *p++ = 65; 6473 p++; 6474 *p++ = DW_CFA_advance_loc + 4; 6475 *p++ = DW_CFA_restore_extended; 6476 *p++ = 65; 6477 } 6478 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4) 6479 == htab->glink_eh_frame->size); 6480 } 6481 6482 return TRUE; 6483 } 6484 6485 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ 6486 6487 static bfd_boolean 6488 ppc_elf_hash_symbol (struct elf_link_hash_entry *h) 6489 { 6490 if (h->plt.plist != NULL 6491 && !h->def_regular 6492 && (!h->pointer_equality_needed 6493 || !h->ref_regular_nonweak)) 6494 return FALSE; 6495 6496 return _bfd_elf_hash_symbol (h); 6497 } 6498 6499 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) 6501 6502 /* Relaxation trampolines. r12 is available for clobbering (r11, is 6503 used for some functions that are allowed to break the ABI). */ 6504 static const int shared_stub_entry[] = 6505 { 6506 0x7c0802a6, /* mflr 0 */ 6507 0x429f0005, /* bcl 20, 31, .Lxxx */ 6508 0x7d8802a6, /* mflr 12 */ 6509 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */ 6510 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */ 6511 0x7c0803a6, /* mtlr 0 */ 6512 0x7d8903a6, /* mtctr 12 */ 6513 0x4e800420, /* bctr */ 6514 }; 6515 6516 static const int stub_entry[] = 6517 { 6518 0x3d800000, /* lis 12,xxx@ha */ 6519 0x398c0000, /* addi 12,12,xxx@l */ 6520 0x7d8903a6, /* mtctr 12 */ 6521 0x4e800420, /* bctr */ 6522 }; 6523 6524 static bfd_boolean 6525 ppc_elf_relax_section (bfd *abfd, 6526 asection *isec, 6527 struct bfd_link_info *link_info, 6528 bfd_boolean *again) 6529 { 6530 struct one_fixup 6531 { 6532 struct one_fixup *next; 6533 asection *tsec; 6534 /* Final link, can use the symbol offset. For a 6535 relocatable link we use the symbol's index. */ 6536 bfd_vma toff; 6537 bfd_vma trampoff; 6538 }; 6539 6540 Elf_Internal_Shdr *symtab_hdr; 6541 bfd_byte *contents = NULL; 6542 Elf_Internal_Sym *isymbuf = NULL; 6543 Elf_Internal_Rela *internal_relocs = NULL; 6544 Elf_Internal_Rela *irel, *irelend; 6545 struct one_fixup *fixups = NULL; 6546 unsigned changes = 0; 6547 struct ppc_elf_link_hash_table *htab; 6548 bfd_size_type trampoff; 6549 asection *got2; 6550 bfd_boolean maybe_pasted; 6551 6552 *again = FALSE; 6553 6554 /* Nothing to do if there are no relocations, and no need to do 6555 anything with non-alloc or non-code sections. */ 6556 if ((isec->flags & SEC_ALLOC) == 0 6557 || (isec->flags & SEC_CODE) == 0 6558 || (isec->flags & SEC_RELOC) == 0 6559 || isec->reloc_count == 0) 6560 return TRUE; 6561 6562 /* We cannot represent the required PIC relocs in the output, so don't 6563 do anything. The linker doesn't support mixing -shared and -r 6564 anyway. */ 6565 if (link_info->relocatable && link_info->shared) 6566 return TRUE; 6567 6568 trampoff = (isec->size + 3) & (bfd_vma) -4; 6569 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0 6570 || strcmp (isec->output_section->name, ".fini") == 0); 6571 /* Space for a branch around any trampolines. */ 6572 if (maybe_pasted) 6573 trampoff += 4; 6574 6575 symtab_hdr = &elf_symtab_hdr (abfd); 6576 6577 /* Get a copy of the native relocations. */ 6578 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, 6579 link_info->keep_memory); 6580 if (internal_relocs == NULL) 6581 goto error_return; 6582 6583 htab = ppc_elf_hash_table (link_info); 6584 got2 = bfd_get_section_by_name (abfd, ".got2"); 6585 6586 irelend = internal_relocs + isec->reloc_count; 6587 for (irel = internal_relocs; irel < irelend; irel++) 6588 { 6589 unsigned long r_type = ELF32_R_TYPE (irel->r_info); 6590 bfd_vma toff, roff; 6591 asection *tsec; 6592 struct one_fixup *f; 6593 size_t insn_offset = 0; 6594 bfd_vma max_branch_offset, val; 6595 bfd_byte *hit_addr; 6596 unsigned long t0; 6597 struct elf_link_hash_entry *h; 6598 struct plt_entry **plist; 6599 unsigned char sym_type; 6600 6601 switch (r_type) 6602 { 6603 case R_PPC_REL24: 6604 case R_PPC_LOCAL24PC: 6605 case R_PPC_PLTREL24: 6606 max_branch_offset = 1 << 25; 6607 break; 6608 6609 case R_PPC_REL14: 6610 case R_PPC_REL14_BRTAKEN: 6611 case R_PPC_REL14_BRNTAKEN: 6612 max_branch_offset = 1 << 15; 6613 break; 6614 6615 default: 6616 continue; 6617 } 6618 6619 /* Get the value of the symbol referred to by the reloc. */ 6620 h = NULL; 6621 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) 6622 { 6623 /* A local symbol. */ 6624 Elf_Internal_Sym *isym; 6625 6626 /* Read this BFD's local symbols. */ 6627 if (isymbuf == NULL) 6628 { 6629 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; 6630 if (isymbuf == NULL) 6631 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, 6632 symtab_hdr->sh_info, 0, 6633 NULL, NULL, NULL); 6634 if (isymbuf == 0) 6635 goto error_return; 6636 } 6637 isym = isymbuf + ELF32_R_SYM (irel->r_info); 6638 if (isym->st_shndx == SHN_UNDEF) 6639 tsec = bfd_und_section_ptr; 6640 else if (isym->st_shndx == SHN_ABS) 6641 tsec = bfd_abs_section_ptr; 6642 else if (isym->st_shndx == SHN_COMMON) 6643 tsec = bfd_com_section_ptr; 6644 else 6645 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); 6646 6647 toff = isym->st_value; 6648 sym_type = ELF_ST_TYPE (isym->st_info); 6649 } 6650 else 6651 { 6652 /* Global symbol handling. */ 6653 unsigned long indx; 6654 6655 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; 6656 h = elf_sym_hashes (abfd)[indx]; 6657 6658 while (h->root.type == bfd_link_hash_indirect 6659 || h->root.type == bfd_link_hash_warning) 6660 h = (struct elf_link_hash_entry *) h->root.u.i.link; 6661 6662 if (h->root.type == bfd_link_hash_defined 6663 || h->root.type == bfd_link_hash_defweak) 6664 { 6665 tsec = h->root.u.def.section; 6666 toff = h->root.u.def.value; 6667 } 6668 else if (h->root.type == bfd_link_hash_undefined 6669 || h->root.type == bfd_link_hash_undefweak) 6670 { 6671 tsec = bfd_und_section_ptr; 6672 toff = link_info->relocatable ? indx : 0; 6673 } 6674 else 6675 continue; 6676 6677 sym_type = h->type; 6678 } 6679 6680 /* The condition here under which we call find_plt_ent must 6681 match that in relocate_section. If we call find_plt_ent here 6682 but not in relocate_section, or vice versa, then the branch 6683 destination used here may be incorrect. */ 6684 plist = NULL; 6685 if (h != NULL) 6686 { 6687 /* We know is_branch_reloc (r_type) is true. */ 6688 if (h->type == STT_GNU_IFUNC 6689 || r_type == R_PPC_PLTREL24) 6690 plist = &h->plt.plist; 6691 } 6692 else if (sym_type == STT_GNU_IFUNC 6693 && elf_local_got_offsets (abfd) != NULL) 6694 { 6695 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd); 6696 struct plt_entry **local_plt = (struct plt_entry **) 6697 (local_got_offsets + symtab_hdr->sh_info); 6698 plist = local_plt + ELF32_R_SYM (irel->r_info); 6699 } 6700 if (plist != NULL) 6701 { 6702 bfd_vma addend = 0; 6703 struct plt_entry *ent; 6704 6705 if (r_type == R_PPC_PLTREL24 && link_info->shared) 6706 addend = irel->r_addend; 6707 ent = find_plt_ent (plist, got2, addend); 6708 if (ent != NULL) 6709 { 6710 if (htab->plt_type == PLT_NEW 6711 || h == NULL 6712 || !htab->elf.dynamic_sections_created 6713 || h->dynindx == -1) 6714 { 6715 tsec = htab->glink; 6716 toff = ent->glink_offset; 6717 } 6718 else 6719 { 6720 tsec = htab->plt; 6721 toff = ent->plt.offset; 6722 } 6723 } 6724 } 6725 6726 /* If the branch and target are in the same section, you have 6727 no hope of adding stubs. We'll error out later should the 6728 branch overflow. */ 6729 if (tsec == isec) 6730 continue; 6731 6732 /* There probably isn't any reason to handle symbols in 6733 SEC_MERGE sections; SEC_MERGE doesn't seem a likely 6734 attribute for a code section, and we are only looking at 6735 branches. However, implement it correctly here as a 6736 reference for other target relax_section functions. */ 6737 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE) 6738 { 6739 /* At this stage in linking, no SEC_MERGE symbol has been 6740 adjusted, so all references to such symbols need to be 6741 passed through _bfd_merged_section_offset. (Later, in 6742 relocate_section, all SEC_MERGE symbols *except* for 6743 section symbols have been adjusted.) 6744 6745 gas may reduce relocations against symbols in SEC_MERGE 6746 sections to a relocation against the section symbol when 6747 the original addend was zero. When the reloc is against 6748 a section symbol we should include the addend in the 6749 offset passed to _bfd_merged_section_offset, since the 6750 location of interest is the original symbol. On the 6751 other hand, an access to "sym+addend" where "sym" is not 6752 a section symbol should not include the addend; Such an 6753 access is presumed to be an offset from "sym"; The 6754 location of interest is just "sym". */ 6755 if (sym_type == STT_SECTION) 6756 toff += irel->r_addend; 6757 6758 toff = _bfd_merged_section_offset (abfd, &tsec, 6759 elf_section_data (tsec)->sec_info, 6760 toff); 6761 6762 if (sym_type != STT_SECTION) 6763 toff += irel->r_addend; 6764 } 6765 /* PLTREL24 addends are special. */ 6766 else if (r_type != R_PPC_PLTREL24) 6767 toff += irel->r_addend; 6768 6769 /* Attempted -shared link of non-pic code loses. */ 6770 if (tsec->output_section == NULL) 6771 continue; 6772 6773 roff = irel->r_offset; 6774 6775 /* If the branch is in range, no need to do anything. */ 6776 if (tsec != bfd_und_section_ptr 6777 && (!link_info->relocatable 6778 /* A relocatable link may have sections moved during 6779 final link, so do not presume they remain in range. */ 6780 || tsec->output_section == isec->output_section)) 6781 { 6782 bfd_vma symaddr, reladdr; 6783 6784 symaddr = tsec->output_section->vma + tsec->output_offset + toff; 6785 reladdr = isec->output_section->vma + isec->output_offset + roff; 6786 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset) 6787 continue; 6788 } 6789 6790 /* Look for an existing fixup to this address. */ 6791 for (f = fixups; f ; f = f->next) 6792 if (f->tsec == tsec && f->toff == toff) 6793 break; 6794 6795 if (f == NULL) 6796 { 6797 size_t size; 6798 unsigned long stub_rtype; 6799 6800 val = trampoff - roff; 6801 if (val >= max_branch_offset) 6802 /* Oh dear, we can't reach a trampoline. Don't try to add 6803 one. We'll report an error later. */ 6804 continue; 6805 6806 if (link_info->shared) 6807 { 6808 size = 4 * ARRAY_SIZE (shared_stub_entry); 6809 insn_offset = 12; 6810 } 6811 else 6812 { 6813 size = 4 * ARRAY_SIZE (stub_entry); 6814 insn_offset = 0; 6815 } 6816 stub_rtype = R_PPC_RELAX; 6817 if (tsec == htab->plt 6818 || tsec == htab->glink) 6819 { 6820 stub_rtype = R_PPC_RELAX_PLT; 6821 if (r_type == R_PPC_PLTREL24) 6822 stub_rtype = R_PPC_RELAX_PLTREL24; 6823 } 6824 6825 /* Hijack the old relocation. Since we need two 6826 relocations for this use a "composite" reloc. */ 6827 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), 6828 stub_rtype); 6829 irel->r_offset = trampoff + insn_offset; 6830 if (r_type == R_PPC_PLTREL24 6831 && stub_rtype != R_PPC_RELAX_PLTREL24) 6832 irel->r_addend = 0; 6833 6834 /* Record the fixup so we don't do it again this section. */ 6835 f = bfd_malloc (sizeof (*f)); 6836 f->next = fixups; 6837 f->tsec = tsec; 6838 f->toff = toff; 6839 f->trampoff = trampoff; 6840 fixups = f; 6841 6842 trampoff += size; 6843 changes++; 6844 } 6845 else 6846 { 6847 val = f->trampoff - roff; 6848 if (val >= max_branch_offset) 6849 continue; 6850 6851 /* Nop out the reloc, since we're finalizing things here. */ 6852 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 6853 } 6854 6855 /* Get the section contents. */ 6856 if (contents == NULL) 6857 { 6858 /* Get cached copy if it exists. */ 6859 if (elf_section_data (isec)->this_hdr.contents != NULL) 6860 contents = elf_section_data (isec)->this_hdr.contents; 6861 else 6862 { 6863 /* Go get them off disk. */ 6864 if (!bfd_malloc_and_get_section (abfd, isec, &contents)) 6865 goto error_return; 6866 } 6867 } 6868 6869 /* Fix up the existing branch to hit the trampoline. */ 6870 hit_addr = contents + roff; 6871 switch (r_type) 6872 { 6873 case R_PPC_REL24: 6874 case R_PPC_LOCAL24PC: 6875 case R_PPC_PLTREL24: 6876 t0 = bfd_get_32 (abfd, hit_addr); 6877 t0 &= ~0x3fffffc; 6878 t0 |= val & 0x3fffffc; 6879 bfd_put_32 (abfd, t0, hit_addr); 6880 break; 6881 6882 case R_PPC_REL14: 6883 case R_PPC_REL14_BRTAKEN: 6884 case R_PPC_REL14_BRNTAKEN: 6885 t0 = bfd_get_32 (abfd, hit_addr); 6886 t0 &= ~0xfffc; 6887 t0 |= val & 0xfffc; 6888 bfd_put_32 (abfd, t0, hit_addr); 6889 break; 6890 } 6891 } 6892 6893 /* Write out the trampolines. */ 6894 if (fixups != NULL) 6895 { 6896 const int *stub; 6897 bfd_byte *dest; 6898 int i, size; 6899 6900 do 6901 { 6902 struct one_fixup *f = fixups; 6903 fixups = fixups->next; 6904 free (f); 6905 } 6906 while (fixups); 6907 6908 contents = bfd_realloc_or_free (contents, trampoff); 6909 if (contents == NULL) 6910 goto error_return; 6911 6912 isec->size = (isec->size + 3) & (bfd_vma) -4; 6913 dest = contents + isec->size; 6914 /* Branch around the trampolines. */ 6915 if (maybe_pasted) 6916 { 6917 bfd_vma val = B + trampoff - isec->size; 6918 bfd_put_32 (abfd, val, dest); 6919 dest += 4; 6920 } 6921 isec->size = trampoff; 6922 6923 if (link_info->shared) 6924 { 6925 stub = shared_stub_entry; 6926 size = ARRAY_SIZE (shared_stub_entry); 6927 } 6928 else 6929 { 6930 stub = stub_entry; 6931 size = ARRAY_SIZE (stub_entry); 6932 } 6933 6934 i = 0; 6935 while (dest < contents + trampoff) 6936 { 6937 bfd_put_32 (abfd, stub[i], dest); 6938 i++; 6939 if (i == size) 6940 i = 0; 6941 dest += 4; 6942 } 6943 BFD_ASSERT (i == 0); 6944 } 6945 6946 if (isymbuf != NULL 6947 && symtab_hdr->contents != (unsigned char *) isymbuf) 6948 { 6949 if (! link_info->keep_memory) 6950 free (isymbuf); 6951 else 6952 { 6953 /* Cache the symbols for elf_link_input_bfd. */ 6954 symtab_hdr->contents = (unsigned char *) isymbuf; 6955 } 6956 } 6957 6958 if (contents != NULL 6959 && elf_section_data (isec)->this_hdr.contents != contents) 6960 { 6961 if (!changes && !link_info->keep_memory) 6962 free (contents); 6963 else 6964 { 6965 /* Cache the section contents for elf_link_input_bfd. */ 6966 elf_section_data (isec)->this_hdr.contents = contents; 6967 } 6968 } 6969 6970 if (changes != 0) 6971 { 6972 /* Append sufficient NOP relocs so we can write out relocation 6973 information for the trampolines. */ 6974 Elf_Internal_Shdr *rel_hdr; 6975 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count) 6976 * sizeof (*new_relocs)); 6977 unsigned ix; 6978 6979 if (!new_relocs) 6980 goto error_return; 6981 memcpy (new_relocs, internal_relocs, 6982 isec->reloc_count * sizeof (*new_relocs)); 6983 for (ix = changes; ix--;) 6984 { 6985 irel = new_relocs + ix + isec->reloc_count; 6986 6987 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); 6988 } 6989 if (internal_relocs != elf_section_data (isec)->relocs) 6990 free (internal_relocs); 6991 elf_section_data (isec)->relocs = new_relocs; 6992 isec->reloc_count += changes; 6993 rel_hdr = _bfd_elf_single_rel_hdr (isec); 6994 rel_hdr->sh_size += changes * rel_hdr->sh_entsize; 6995 } 6996 else if (elf_section_data (isec)->relocs != internal_relocs) 6997 free (internal_relocs); 6998 6999 *again = changes != 0; 7000 if (!*again && link_info->relocatable) 7001 { 7002 /* Convert the internal relax relocs to external form. */ 7003 for (irel = internal_relocs; irel < irelend; irel++) 7004 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX) 7005 { 7006 unsigned long r_symndx = ELF32_R_SYM (irel->r_info); 7007 7008 /* Rewrite the reloc and convert one of the trailing nop 7009 relocs to describe this relocation. */ 7010 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE); 7011 /* The relocs are at the bottom 2 bytes */ 7012 irel[0].r_offset += 2; 7013 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel)); 7014 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); 7015 irel[1].r_offset += 4; 7016 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); 7017 irel++; 7018 } 7019 } 7020 7021 return TRUE; 7022 7023 error_return: 7024 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) 7025 free (isymbuf); 7026 if (contents != NULL 7027 && elf_section_data (isec)->this_hdr.contents != contents) 7028 free (contents); 7029 if (internal_relocs != NULL 7030 && elf_section_data (isec)->relocs != internal_relocs) 7031 free (internal_relocs); 7032 return FALSE; 7033 } 7034 7035 /* What to do when ld finds relocations against symbols defined in 7037 discarded sections. */ 7038 7039 static unsigned int 7040 ppc_elf_action_discarded (asection *sec) 7041 { 7042 if (strcmp (".fixup", sec->name) == 0) 7043 return 0; 7044 7045 if (strcmp (".got2", sec->name) == 0) 7046 return 0; 7047 7048 return _bfd_elf_default_action_discarded (sec); 7049 } 7050 7051 /* Fill in the address for a pointer generated in a linker section. */ 7053 7054 static bfd_vma 7055 elf_finish_pointer_linker_section (bfd *input_bfd, 7056 elf_linker_section_t *lsect, 7057 struct elf_link_hash_entry *h, 7058 bfd_vma relocation, 7059 const Elf_Internal_Rela *rel) 7060 { 7061 elf_linker_section_pointers_t *linker_section_ptr; 7062 7063 BFD_ASSERT (lsect != NULL); 7064 7065 if (h != NULL) 7066 { 7067 /* Handle global symbol. */ 7068 struct ppc_elf_link_hash_entry *eh; 7069 7070 eh = (struct ppc_elf_link_hash_entry *) h; 7071 BFD_ASSERT (eh->elf.def_regular); 7072 linker_section_ptr = eh->linker_section_pointer; 7073 } 7074 else 7075 { 7076 /* Handle local symbol. */ 7077 unsigned long r_symndx = ELF32_R_SYM (rel->r_info); 7078 7079 BFD_ASSERT (is_ppc_elf (input_bfd)); 7080 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); 7081 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; 7082 } 7083 7084 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, 7085 rel->r_addend, 7086 lsect); 7087 BFD_ASSERT (linker_section_ptr != NULL); 7088 7089 /* Offset will always be a multiple of four, so use the bottom bit 7090 as a "written" flag. */ 7091 if ((linker_section_ptr->offset & 1) == 0) 7092 { 7093 bfd_put_32 (lsect->section->owner, 7094 relocation + linker_section_ptr->addend, 7095 lsect->section->contents + linker_section_ptr->offset); 7096 linker_section_ptr->offset += 1; 7097 } 7098 7099 relocation = (lsect->section->output_section->vma 7100 + lsect->section->output_offset 7101 + linker_section_ptr->offset - 1 7102 - SYM_VAL (lsect->sym)); 7103 7104 #ifdef DEBUG 7105 fprintf (stderr, 7106 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", 7107 lsect->name, (long) relocation, (long) relocation); 7108 #endif 7109 7110 return relocation; 7111 } 7112 7113 #define PPC_LO(v) ((v) & 0xffff) 7114 #define PPC_HI(v) (((v) >> 16) & 0xffff) 7115 #define PPC_HA(v) PPC_HI ((v) + 0x8000) 7116 7117 static void 7118 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p, 7119 struct bfd_link_info *info) 7120 { 7121 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); 7122 bfd *output_bfd = info->output_bfd; 7123 bfd_vma plt; 7124 7125 plt = ((ent->plt.offset & ~1) 7126 + plt_sec->output_section->vma 7127 + plt_sec->output_offset); 7128 7129 if (info->shared) 7130 { 7131 bfd_vma got = 0; 7132 7133 if (ent->addend >= 32768) 7134 got = (ent->addend 7135 + ent->sec->output_section->vma 7136 + ent->sec->output_offset); 7137 else if (htab->elf.hgot != NULL) 7138 got = SYM_VAL (htab->elf.hgot); 7139 7140 plt -= got; 7141 7142 if (plt + 0x8000 < 0x10000) 7143 { 7144 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p); 7145 p += 4; 7146 bfd_put_32 (output_bfd, MTCTR_11, p); 7147 p += 4; 7148 bfd_put_32 (output_bfd, BCTR, p); 7149 p += 4; 7150 bfd_put_32 (output_bfd, NOP, p); 7151 p += 4; 7152 } 7153 else 7154 { 7155 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p); 7156 p += 4; 7157 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7158 p += 4; 7159 bfd_put_32 (output_bfd, MTCTR_11, p); 7160 p += 4; 7161 bfd_put_32 (output_bfd, BCTR, p); 7162 p += 4; 7163 } 7164 } 7165 else 7166 { 7167 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p); 7168 p += 4; 7169 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p); 7170 p += 4; 7171 bfd_put_32 (output_bfd, MTCTR_11, p); 7172 p += 4; 7173 bfd_put_32 (output_bfd, BCTR, p); 7174 p += 4; 7175 } 7176 } 7177 7178 /* Return true if symbol is defined statically. */ 7179 7180 static bfd_boolean 7181 is_static_defined (struct elf_link_hash_entry *h) 7182 { 7183 return ((h->root.type == bfd_link_hash_defined 7184 || h->root.type == bfd_link_hash_defweak) 7185 && h->root.u.def.section != NULL 7186 && h->root.u.def.section->output_section != NULL); 7187 } 7188 7189 /* If INSN is an opcode that may be used with an @tls operand, return 7190 the transformed insn for TLS optimisation, otherwise return 0. If 7191 REG is non-zero only match an insn with RB or RA equal to REG. */ 7192 7193 unsigned int 7194 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg) 7195 { 7196 unsigned int rtra; 7197 7198 if ((insn & (0x3f << 26)) != 31 << 26) 7199 return 0; 7200 7201 if (reg == 0 || ((insn >> 11) & 0x1f) == reg) 7202 rtra = insn & ((1 << 26) - (1 << 16)); 7203 else if (((insn >> 16) & 0x1f) == reg) 7204 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5); 7205 else 7206 return 0; 7207 7208 if ((insn & (0x3ff << 1)) == 266 << 1) 7209 /* add -> addi. */ 7210 insn = 14 << 26; 7211 else if ((insn & (0x1f << 1)) == 23 << 1 7212 && ((insn & (0x1f << 6)) < 14 << 6 7213 || ((insn & (0x1f << 6)) >= 16 << 6 7214 && (insn & (0x1f << 6)) < 24 << 6))) 7215 /* load and store indexed -> dform. */ 7216 insn = (32 | ((insn >> 6) & 0x1f)) << 26; 7217 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1) 7218 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ 7219 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1); 7220 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1) 7221 /* lwax -> lwa. */ 7222 insn = (58 << 26) | 2; 7223 else 7224 return 0; 7225 insn |= rtra; 7226 return insn; 7227 } 7228 7229 /* If INSN is an opcode that may be used with an @tprel operand, return 7230 the transformed insn for an undefined weak symbol, ie. with the 7231 thread pointer REG operand removed. Otherwise return 0. */ 7232 7233 unsigned int 7234 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) 7235 { 7236 if ((insn & (0x1f << 16)) == reg << 16 7237 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */ 7238 || (insn & (0x3f << 26)) == 15u << 26 /* addis */ 7239 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */ 7240 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */ 7241 || (insn & (0x3f << 26)) == 36u << 26 /* stw */ 7242 || (insn & (0x3f << 26)) == 38u << 26 /* stb */ 7243 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */ 7244 || (insn & (0x3f << 26)) == 42u << 26 /* lha */ 7245 || (insn & (0x3f << 26)) == 44u << 26 /* sth */ 7246 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */ 7247 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */ 7248 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */ 7249 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */ 7250 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */ 7251 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */ 7252 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */ 7253 && (insn & 3) != 1) 7254 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */ 7255 && ((insn & 3) == 0 || (insn & 3) == 3)))) 7256 { 7257 insn &= ~(0x1f << 16); 7258 } 7259 else if ((insn & (0x1f << 21)) == reg << 21 7260 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */ 7261 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */ 7262 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */)) 7263 { 7264 insn &= ~(0x1f << 21); 7265 insn |= (insn & (0x1f << 16)) << 5; 7266 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */) 7267 insn -= 2 >> 26; /* convert to ori,oris */ 7268 } 7269 else 7270 insn = 0; 7271 return insn; 7272 } 7273 7274 static bfd_boolean 7275 is_insn_ds_form (unsigned int insn) 7276 { 7277 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ 7278 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ 7279 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ 7280 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */); 7281 } 7282 7283 static bfd_boolean 7284 is_insn_dq_form (unsigned int insn) 7285 { 7286 return (insn & (0x3f << 26)) == 56u << 26; /* lq */ 7287 } 7288 7289 /* The RELOCATE_SECTION function is called by the ELF backend linker 7290 to handle the relocations for a section. 7291 7292 The relocs are always passed as Rela structures; if the section 7293 actually uses Rel structures, the r_addend field will always be 7294 zero. 7295 7296 This function is responsible for adjust the section contents as 7297 necessary, and (if using Rela relocs and generating a 7298 relocatable output file) adjusting the reloc addend as 7299 necessary. 7300 7301 This function does not have to worry about setting the reloc 7302 address or the reloc symbol index. 7303 7304 LOCAL_SYMS is a pointer to the swapped in local symbols. 7305 7306 LOCAL_SECTIONS is an array giving the section in the input file 7307 corresponding to the st_shndx field of each local symbol. 7308 7309 The global hash table entry for the global symbols can be found 7310 via elf_sym_hashes (input_bfd). 7311 7312 When generating relocatable output, this function must handle 7313 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 7314 going to be the section symbol corresponding to the output 7315 section, which means that the addend must be adjusted 7316 accordingly. */ 7317 7318 static bfd_boolean 7319 ppc_elf_relocate_section (bfd *output_bfd, 7320 struct bfd_link_info *info, 7321 bfd *input_bfd, 7322 asection *input_section, 7323 bfd_byte *contents, 7324 Elf_Internal_Rela *relocs, 7325 Elf_Internal_Sym *local_syms, 7326 asection **local_sections) 7327 { 7328 Elf_Internal_Shdr *symtab_hdr; 7329 struct elf_link_hash_entry **sym_hashes; 7330 struct ppc_elf_link_hash_table *htab; 7331 Elf_Internal_Rela *rel; 7332 Elf_Internal_Rela *relend; 7333 Elf_Internal_Rela outrel; 7334 asection *got2, *sreloc = NULL; 7335 bfd_vma *local_got_offsets; 7336 bfd_boolean ret = TRUE; 7337 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0); 7338 bfd_boolean is_vxworks_tls; 7339 7340 #ifdef DEBUG 7341 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " 7342 "%ld relocations%s", 7343 input_bfd, input_section, 7344 (long) input_section->reloc_count, 7345 (info->relocatable) ? " (relocatable)" : ""); 7346 #endif 7347 7348 got2 = bfd_get_section_by_name (input_bfd, ".got2"); 7349 7350 /* Initialize howto table if not already done. */ 7351 if (!ppc_elf_howto_table[R_PPC_ADDR32]) 7352 ppc_elf_howto_init (); 7353 7354 htab = ppc_elf_hash_table (info); 7355 local_got_offsets = elf_local_got_offsets (input_bfd); 7356 symtab_hdr = &elf_symtab_hdr (input_bfd); 7357 sym_hashes = elf_sym_hashes (input_bfd); 7358 /* We have to handle relocations in vxworks .tls_vars sections 7359 specially, because the dynamic loader is 'weird'. */ 7360 is_vxworks_tls = (htab->is_vxworks && info->shared 7361 && !strcmp (input_section->output_section->name, 7362 ".tls_vars")); 7363 rel = relocs; 7364 relend = relocs + input_section->reloc_count; 7365 for (; rel < relend; rel++) 7366 { 7367 enum elf_ppc_reloc_type r_type; 7368 bfd_vma addend; 7369 bfd_reloc_status_type r; 7370 Elf_Internal_Sym *sym; 7371 asection *sec; 7372 struct elf_link_hash_entry *h; 7373 const char *sym_name; 7374 reloc_howto_type *howto; 7375 unsigned long r_symndx; 7376 bfd_vma relocation; 7377 bfd_vma branch_bit, from; 7378 bfd_boolean unresolved_reloc; 7379 bfd_boolean warned; 7380 unsigned int tls_type, tls_mask, tls_gd; 7381 struct plt_entry **ifunc; 7382 7383 r_type = ELF32_R_TYPE (rel->r_info); 7384 sym = NULL; 7385 sec = NULL; 7386 h = NULL; 7387 unresolved_reloc = FALSE; 7388 warned = FALSE; 7389 r_symndx = ELF32_R_SYM (rel->r_info); 7390 7391 if (r_symndx < symtab_hdr->sh_info) 7392 { 7393 sym = local_syms + r_symndx; 7394 sec = local_sections[r_symndx]; 7395 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); 7396 7397 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 7398 } 7399 else 7400 { 7401 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 7402 r_symndx, symtab_hdr, sym_hashes, 7403 h, sec, relocation, 7404 unresolved_reloc, warned); 7405 7406 sym_name = h->root.root.string; 7407 } 7408 7409 if (sec != NULL && discarded_section (sec)) 7410 { 7411 /* For relocs against symbols from removed linkonce sections, 7412 or sections discarded by a linker script, we just want the 7413 section contents zeroed. Avoid any special processing. */ 7414 howto = NULL; 7415 if (r_type < R_PPC_max) 7416 howto = ppc_elf_howto_table[r_type]; 7417 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, 7418 rel, 1, relend, howto, 0, contents); 7419 } 7420 7421 if (info->relocatable) 7422 { 7423 if (got2 != NULL 7424 && r_type == R_PPC_PLTREL24 7425 && rel->r_addend != 0) 7426 { 7427 /* R_PPC_PLTREL24 is rather special. If non-zero, the 7428 addend specifies the GOT pointer offset within .got2. */ 7429 rel->r_addend += got2->output_offset; 7430 } 7431 continue; 7432 } 7433 7434 /* TLS optimizations. Replace instruction sequences and relocs 7435 based on information we collected in tls_optimize. We edit 7436 RELOCS so that --emit-relocs will output something sensible 7437 for the final instruction stream. */ 7438 tls_mask = 0; 7439 tls_gd = 0; 7440 if (h != NULL) 7441 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; 7442 else if (local_got_offsets != NULL) 7443 { 7444 struct plt_entry **local_plt; 7445 char *lgot_masks; 7446 local_plt 7447 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info); 7448 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info); 7449 tls_mask = lgot_masks[r_symndx]; 7450 } 7451 7452 /* Ensure reloc mapping code below stays sane. */ 7453 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) 7454 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) 7455 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) 7456 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) 7457 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) 7458 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) 7459 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) 7460 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) 7461 abort (); 7462 switch (r_type) 7463 { 7464 default: 7465 break; 7466 7467 case R_PPC_GOT_TPREL16: 7468 case R_PPC_GOT_TPREL16_LO: 7469 if ((tls_mask & TLS_TLS) != 0 7470 && (tls_mask & TLS_TPREL) == 0) 7471 { 7472 bfd_vma insn; 7473 7474 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); 7475 insn &= 31 << 21; 7476 insn |= 0x3c020000; /* addis 0,2,0 */ 7477 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset); 7478 r_type = R_PPC_TPREL16_HA; 7479 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7480 } 7481 break; 7482 7483 case R_PPC_TLS: 7484 if ((tls_mask & TLS_TLS) != 0 7485 && (tls_mask & TLS_TPREL) == 0) 7486 { 7487 bfd_vma insn; 7488 7489 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 7490 insn = _bfd_elf_ppc_at_tls_transform (insn, 2); 7491 if (insn == 0) 7492 abort (); 7493 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 7494 r_type = R_PPC_TPREL16_LO; 7495 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7496 7497 /* Was PPC_TLS which sits on insn boundary, now 7498 PPC_TPREL16_LO which is at low-order half-word. */ 7499 rel->r_offset += d_offset; 7500 } 7501 break; 7502 7503 case R_PPC_GOT_TLSGD16_HI: 7504 case R_PPC_GOT_TLSGD16_HA: 7505 tls_gd = TLS_TPRELGD; 7506 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 7507 goto tls_gdld_hi; 7508 break; 7509 7510 case R_PPC_GOT_TLSLD16_HI: 7511 case R_PPC_GOT_TLSLD16_HA: 7512 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 7513 { 7514 tls_gdld_hi: 7515 if ((tls_mask & tls_gd) != 0) 7516 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 7517 + R_PPC_GOT_TPREL16); 7518 else 7519 { 7520 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 7521 rel->r_offset -= d_offset; 7522 r_type = R_PPC_NONE; 7523 } 7524 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7525 } 7526 break; 7527 7528 case R_PPC_GOT_TLSGD16: 7529 case R_PPC_GOT_TLSGD16_LO: 7530 tls_gd = TLS_TPRELGD; 7531 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 7532 goto tls_ldgd_opt; 7533 break; 7534 7535 case R_PPC_GOT_TLSLD16: 7536 case R_PPC_GOT_TLSLD16_LO: 7537 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 7538 { 7539 unsigned int insn1, insn2; 7540 bfd_vma offset; 7541 7542 tls_ldgd_opt: 7543 offset = (bfd_vma) -1; 7544 /* If not using the newer R_PPC_TLSGD/LD to mark 7545 __tls_get_addr calls, we must trust that the call 7546 stays with its arg setup insns, ie. that the next 7547 reloc is the __tls_get_addr call associated with 7548 the current reloc. Edit both insns. */ 7549 if (input_section->has_tls_get_addr_call 7550 && rel + 1 < relend 7551 && branch_reloc_hash_match (input_bfd, rel + 1, 7552 htab->tls_get_addr)) 7553 offset = rel[1].r_offset; 7554 if ((tls_mask & tls_gd) != 0) 7555 { 7556 /* IE */ 7557 insn1 = bfd_get_32 (output_bfd, 7558 contents + rel->r_offset - d_offset); 7559 insn1 &= (1 << 26) - 1; 7560 insn1 |= 32 << 26; /* lwz */ 7561 if (offset != (bfd_vma) -1) 7562 { 7563 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 7564 insn2 = 0x7c631214; /* add 3,3,2 */ 7565 bfd_put_32 (output_bfd, insn2, contents + offset); 7566 } 7567 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) 7568 + R_PPC_GOT_TPREL16); 7569 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7570 } 7571 else 7572 { 7573 /* LE */ 7574 insn1 = 0x3c620000; /* addis 3,2,0 */ 7575 if (tls_gd == 0) 7576 { 7577 /* Was an LD reloc. */ 7578 for (r_symndx = 0; 7579 r_symndx < symtab_hdr->sh_info; 7580 r_symndx++) 7581 if (local_sections[r_symndx] == sec) 7582 break; 7583 if (r_symndx >= symtab_hdr->sh_info) 7584 r_symndx = STN_UNDEF; 7585 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 7586 if (r_symndx != STN_UNDEF) 7587 rel->r_addend -= (local_syms[r_symndx].st_value 7588 + sec->output_offset 7589 + sec->output_section->vma); 7590 } 7591 r_type = R_PPC_TPREL16_HA; 7592 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7593 if (offset != (bfd_vma) -1) 7594 { 7595 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 7596 rel[1].r_offset = offset + d_offset; 7597 rel[1].r_addend = rel->r_addend; 7598 insn2 = 0x38630000; /* addi 3,3,0 */ 7599 bfd_put_32 (output_bfd, insn2, contents + offset); 7600 } 7601 } 7602 bfd_put_32 (output_bfd, insn1, 7603 contents + rel->r_offset - d_offset); 7604 if (tls_gd == 0) 7605 { 7606 /* We changed the symbol on an LD reloc. Start over 7607 in order to get h, sym, sec etc. right. */ 7608 rel--; 7609 continue; 7610 } 7611 } 7612 break; 7613 7614 case R_PPC_TLSGD: 7615 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0) 7616 { 7617 unsigned int insn2; 7618 bfd_vma offset = rel->r_offset; 7619 7620 if ((tls_mask & TLS_TPRELGD) != 0) 7621 { 7622 /* IE */ 7623 r_type = R_PPC_NONE; 7624 insn2 = 0x7c631214; /* add 3,3,2 */ 7625 } 7626 else 7627 { 7628 /* LE */ 7629 r_type = R_PPC_TPREL16_LO; 7630 rel->r_offset += d_offset; 7631 insn2 = 0x38630000; /* addi 3,3,0 */ 7632 } 7633 rel->r_info = ELF32_R_INFO (r_symndx, r_type); 7634 bfd_put_32 (output_bfd, insn2, contents + offset); 7635 /* Zap the reloc on the _tls_get_addr call too. */ 7636 BFD_ASSERT (offset == rel[1].r_offset); 7637 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 7638 } 7639 break; 7640 7641 case R_PPC_TLSLD: 7642 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0) 7643 { 7644 unsigned int insn2; 7645 7646 for (r_symndx = 0; 7647 r_symndx < symtab_hdr->sh_info; 7648 r_symndx++) 7649 if (local_sections[r_symndx] == sec) 7650 break; 7651 if (r_symndx >= symtab_hdr->sh_info) 7652 r_symndx = STN_UNDEF; 7653 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 7654 if (r_symndx != STN_UNDEF) 7655 rel->r_addend -= (local_syms[r_symndx].st_value 7656 + sec->output_offset 7657 + sec->output_section->vma); 7658 7659 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO); 7660 rel->r_offset += d_offset; 7661 insn2 = 0x38630000; /* addi 3,3,0 */ 7662 bfd_put_32 (output_bfd, insn2, 7663 contents + rel->r_offset - d_offset); 7664 /* Zap the reloc on the _tls_get_addr call too. */ 7665 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset); 7666 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE); 7667 rel--; 7668 continue; 7669 } 7670 break; 7671 } 7672 7673 /* Handle other relocations that tweak non-addend part of insn. */ 7674 branch_bit = 0; 7675 switch (r_type) 7676 { 7677 default: 7678 break; 7679 7680 /* Branch taken prediction relocations. */ 7681 case R_PPC_ADDR14_BRTAKEN: 7682 case R_PPC_REL14_BRTAKEN: 7683 branch_bit = BRANCH_PREDICT_BIT; 7684 /* Fall thru */ 7685 7686 /* Branch not taken prediction relocations. */ 7687 case R_PPC_ADDR14_BRNTAKEN: 7688 case R_PPC_REL14_BRNTAKEN: 7689 { 7690 bfd_vma insn; 7691 7692 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 7693 insn &= ~BRANCH_PREDICT_BIT; 7694 insn |= branch_bit; 7695 7696 from = (rel->r_offset 7697 + input_section->output_offset 7698 + input_section->output_section->vma); 7699 7700 /* Invert 'y' bit if not the default. */ 7701 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) 7702 insn ^= BRANCH_PREDICT_BIT; 7703 7704 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 7705 break; 7706 } 7707 } 7708 7709 ifunc = NULL; 7710 if (!htab->is_vxworks) 7711 { 7712 struct plt_entry *ent; 7713 7714 if (h != NULL) 7715 { 7716 if (h->type == STT_GNU_IFUNC) 7717 ifunc = &h->plt.plist; 7718 } 7719 else if (local_got_offsets != NULL 7720 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) 7721 { 7722 struct plt_entry **local_plt; 7723 7724 local_plt = (struct plt_entry **) (local_got_offsets 7725 + symtab_hdr->sh_info); 7726 ifunc = local_plt + r_symndx; 7727 } 7728 7729 ent = NULL; 7730 if (ifunc != NULL 7731 && (!info->shared 7732 || is_branch_reloc (r_type))) 7733 { 7734 addend = 0; 7735 if (r_type == R_PPC_PLTREL24 && info->shared) 7736 addend = rel->r_addend; 7737 ent = find_plt_ent (ifunc, got2, addend); 7738 } 7739 if (ent != NULL) 7740 { 7741 if (h == NULL && (ent->plt.offset & 1) == 0) 7742 { 7743 Elf_Internal_Rela rela; 7744 bfd_byte *loc; 7745 7746 rela.r_offset = (htab->iplt->output_section->vma 7747 + htab->iplt->output_offset 7748 + ent->plt.offset); 7749 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 7750 rela.r_addend = relocation; 7751 loc = htab->reliplt->contents; 7752 loc += (htab->reliplt->reloc_count++ 7753 * sizeof (Elf32_External_Rela)); 7754 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 7755 7756 ent->plt.offset |= 1; 7757 } 7758 if (h == NULL && (ent->glink_offset & 1) == 0) 7759 { 7760 unsigned char *p = ((unsigned char *) htab->glink->contents 7761 + ent->glink_offset); 7762 write_glink_stub (ent, htab->iplt, p, info); 7763 ent->glink_offset |= 1; 7764 } 7765 7766 unresolved_reloc = FALSE; 7767 if (htab->plt_type == PLT_NEW 7768 || !htab->elf.dynamic_sections_created 7769 || h == NULL) 7770 relocation = (htab->glink->output_section->vma 7771 + htab->glink->output_offset 7772 + (ent->glink_offset & ~1)); 7773 else 7774 relocation = (htab->plt->output_section->vma 7775 + htab->plt->output_offset 7776 + ent->plt.offset); 7777 } 7778 } 7779 7780 addend = rel->r_addend; 7781 tls_type = 0; 7782 howto = NULL; 7783 if (r_type < R_PPC_max) 7784 howto = ppc_elf_howto_table[r_type]; 7785 switch ((int)r_type) 7786 { 7787 default: 7788 info->callbacks->einfo 7789 (_("%P: %B: unknown relocation type %d for symbol %s\n"), 7790 input_bfd, (int) r_type, sym_name); 7791 7792 bfd_set_error (bfd_error_bad_value); 7793 ret = FALSE; 7794 continue; 7795 7796 case R_PPC_NONE: 7797 case R_PPC_TLS: 7798 case R_PPC_TLSGD: 7799 case R_PPC_TLSLD: 7800 case R_PPC_EMB_MRKREF: 7801 case R_PPC_GNU_VTINHERIT: 7802 case R_PPC_GNU_VTENTRY: 7803 continue; 7804 7805 /* GOT16 relocations. Like an ADDR16 using the symbol's 7806 address in the GOT as relocation value instead of the 7807 symbol's value itself. Also, create a GOT entry for the 7808 symbol and put the symbol value there. */ 7809 case R_PPC_GOT_TLSGD16: 7810 case R_PPC_GOT_TLSGD16_LO: 7811 case R_PPC_GOT_TLSGD16_HI: 7812 case R_PPC_GOT_TLSGD16_HA: 7813 tls_type = TLS_TLS | TLS_GD; 7814 goto dogot; 7815 7816 case R_PPC_GOT_TLSLD16: 7817 case R_PPC_GOT_TLSLD16_LO: 7818 case R_PPC_GOT_TLSLD16_HI: 7819 case R_PPC_GOT_TLSLD16_HA: 7820 tls_type = TLS_TLS | TLS_LD; 7821 goto dogot; 7822 7823 case R_PPC_GOT_TPREL16: 7824 case R_PPC_GOT_TPREL16_LO: 7825 case R_PPC_GOT_TPREL16_HI: 7826 case R_PPC_GOT_TPREL16_HA: 7827 tls_type = TLS_TLS | TLS_TPREL; 7828 goto dogot; 7829 7830 case R_PPC_GOT_DTPREL16: 7831 case R_PPC_GOT_DTPREL16_LO: 7832 case R_PPC_GOT_DTPREL16_HI: 7833 case R_PPC_GOT_DTPREL16_HA: 7834 tls_type = TLS_TLS | TLS_DTPREL; 7835 goto dogot; 7836 7837 case R_PPC_GOT16: 7838 case R_PPC_GOT16_LO: 7839 case R_PPC_GOT16_HI: 7840 case R_PPC_GOT16_HA: 7841 tls_mask = 0; 7842 dogot: 7843 { 7844 /* Relocation is to the entry for this symbol in the global 7845 offset table. */ 7846 bfd_vma off; 7847 bfd_vma *offp; 7848 unsigned long indx; 7849 7850 if (htab->got == NULL) 7851 abort (); 7852 7853 indx = 0; 7854 if (tls_type == (TLS_TLS | TLS_LD) 7855 && (h == NULL 7856 || !h->def_dynamic)) 7857 offp = &htab->tlsld_got.offset; 7858 else if (h != NULL) 7859 { 7860 bfd_boolean dyn; 7861 dyn = htab->elf.dynamic_sections_created; 7862 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 7863 || (info->shared 7864 && SYMBOL_REFERENCES_LOCAL (info, h))) 7865 /* This is actually a static link, or it is a 7866 -Bsymbolic link and the symbol is defined 7867 locally, or the symbol was forced to be local 7868 because of a version file. */ 7869 ; 7870 else 7871 { 7872 BFD_ASSERT (h->dynindx != -1); 7873 indx = h->dynindx; 7874 unresolved_reloc = FALSE; 7875 } 7876 offp = &h->got.offset; 7877 } 7878 else 7879 { 7880 if (local_got_offsets == NULL) 7881 abort (); 7882 offp = &local_got_offsets[r_symndx]; 7883 } 7884 7885 /* The offset must always be a multiple of 4. We use the 7886 least significant bit to record whether we have already 7887 processed this entry. */ 7888 off = *offp; 7889 if ((off & 1) != 0) 7890 off &= ~1; 7891 else 7892 { 7893 unsigned int tls_m = (tls_mask 7894 & (TLS_LD | TLS_GD | TLS_DTPREL 7895 | TLS_TPREL | TLS_TPRELGD)); 7896 7897 if (offp == &htab->tlsld_got.offset) 7898 tls_m = TLS_LD; 7899 else if (h == NULL 7900 || !h->def_dynamic) 7901 tls_m &= ~TLS_LD; 7902 7903 /* We might have multiple got entries for this sym. 7904 Initialize them all. */ 7905 do 7906 { 7907 int tls_ty = 0; 7908 7909 if ((tls_m & TLS_LD) != 0) 7910 { 7911 tls_ty = TLS_TLS | TLS_LD; 7912 tls_m &= ~TLS_LD; 7913 } 7914 else if ((tls_m & TLS_GD) != 0) 7915 { 7916 tls_ty = TLS_TLS | TLS_GD; 7917 tls_m &= ~TLS_GD; 7918 } 7919 else if ((tls_m & TLS_DTPREL) != 0) 7920 { 7921 tls_ty = TLS_TLS | TLS_DTPREL; 7922 tls_m &= ~TLS_DTPREL; 7923 } 7924 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) 7925 { 7926 tls_ty = TLS_TLS | TLS_TPREL; 7927 tls_m = 0; 7928 } 7929 7930 /* Generate relocs for the dynamic linker. */ 7931 if ((info->shared || indx != 0) 7932 && (offp == &htab->tlsld_got.offset 7933 || h == NULL 7934 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 7935 || h->root.type != bfd_link_hash_undefweak)) 7936 { 7937 asection *rsec = htab->relgot; 7938 bfd_byte * loc; 7939 7940 outrel.r_offset = (htab->got->output_section->vma 7941 + htab->got->output_offset 7942 + off); 7943 outrel.r_addend = 0; 7944 if (tls_ty & (TLS_LD | TLS_GD)) 7945 { 7946 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); 7947 if (tls_ty == (TLS_TLS | TLS_GD)) 7948 { 7949 loc = rsec->contents; 7950 loc += (rsec->reloc_count++ 7951 * sizeof (Elf32_External_Rela)); 7952 bfd_elf32_swap_reloca_out (output_bfd, 7953 &outrel, loc); 7954 outrel.r_offset += 4; 7955 outrel.r_info 7956 = ELF32_R_INFO (indx, R_PPC_DTPREL32); 7957 } 7958 } 7959 else if (tls_ty == (TLS_TLS | TLS_DTPREL)) 7960 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); 7961 else if (tls_ty == (TLS_TLS | TLS_TPREL)) 7962 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); 7963 else if (indx != 0) 7964 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); 7965 else if (ifunc != NULL) 7966 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 7967 else 7968 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 7969 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD)) 7970 { 7971 outrel.r_addend += relocation; 7972 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 7973 outrel.r_addend -= htab->elf.tls_sec->vma; 7974 } 7975 loc = rsec->contents; 7976 loc += (rsec->reloc_count++ 7977 * sizeof (Elf32_External_Rela)); 7978 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 7979 } 7980 7981 /* Init the .got section contents if we're not 7982 emitting a reloc. */ 7983 else 7984 { 7985 bfd_vma value = relocation; 7986 7987 if (tls_ty == (TLS_TLS | TLS_LD)) 7988 value = 1; 7989 else if (tls_ty != 0) 7990 { 7991 value -= htab->elf.tls_sec->vma + DTP_OFFSET; 7992 if (tls_ty == (TLS_TLS | TLS_TPREL)) 7993 value += DTP_OFFSET - TP_OFFSET; 7994 7995 if (tls_ty == (TLS_TLS | TLS_GD)) 7996 { 7997 bfd_put_32 (output_bfd, value, 7998 htab->got->contents + off + 4); 7999 value = 1; 8000 } 8001 } 8002 bfd_put_32 (output_bfd, value, 8003 htab->got->contents + off); 8004 } 8005 8006 off += 4; 8007 if (tls_ty & (TLS_LD | TLS_GD)) 8008 off += 4; 8009 } 8010 while (tls_m != 0); 8011 8012 off = *offp; 8013 *offp = off | 1; 8014 } 8015 8016 if (off >= (bfd_vma) -2) 8017 abort (); 8018 8019 if ((tls_type & TLS_TLS) != 0) 8020 { 8021 if (tls_type != (TLS_TLS | TLS_LD)) 8022 { 8023 if ((tls_mask & TLS_LD) != 0 8024 && !(h == NULL 8025 || !h->def_dynamic)) 8026 off += 8; 8027 if (tls_type != (TLS_TLS | TLS_GD)) 8028 { 8029 if ((tls_mask & TLS_GD) != 0) 8030 off += 8; 8031 if (tls_type != (TLS_TLS | TLS_DTPREL)) 8032 { 8033 if ((tls_mask & TLS_DTPREL) != 0) 8034 off += 4; 8035 } 8036 } 8037 } 8038 } 8039 8040 relocation = (htab->got->output_section->vma 8041 + htab->got->output_offset 8042 + off 8043 - SYM_VAL (htab->elf.hgot)); 8044 8045 /* Addends on got relocations don't make much sense. 8046 x+off@got is actually x@got+off, and since the got is 8047 generated by a hash table traversal, the value in the 8048 got at entry m+n bears little relation to the entry m. */ 8049 if (addend != 0) 8050 info->callbacks->einfo 8051 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"), 8052 input_bfd, input_section, rel->r_offset, 8053 howto->name, 8054 sym_name); 8055 } 8056 break; 8057 8058 /* Relocations that need no special processing. */ 8059 case R_PPC_LOCAL24PC: 8060 /* It makes no sense to point a local relocation 8061 at a symbol not in this object. */ 8062 if (unresolved_reloc) 8063 { 8064 if (! (*info->callbacks->undefined_symbol) (info, 8065 h->root.root.string, 8066 input_bfd, 8067 input_section, 8068 rel->r_offset, 8069 TRUE)) 8070 return FALSE; 8071 continue; 8072 } 8073 break; 8074 8075 case R_PPC_DTPREL16: 8076 case R_PPC_DTPREL16_LO: 8077 case R_PPC_DTPREL16_HI: 8078 case R_PPC_DTPREL16_HA: 8079 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8080 break; 8081 8082 /* Relocations that may need to be propagated if this is a shared 8083 object. */ 8084 case R_PPC_TPREL16: 8085 case R_PPC_TPREL16_LO: 8086 case R_PPC_TPREL16_HI: 8087 case R_PPC_TPREL16_HA: 8088 if (h != NULL 8089 && h->root.type == bfd_link_hash_undefweak 8090 && h->dynindx == -1) 8091 { 8092 /* Make this relocation against an undefined weak symbol 8093 resolve to zero. This is really just a tweak, since 8094 code using weak externs ought to check that they are 8095 defined before using them. */ 8096 bfd_byte *p = contents + rel->r_offset - d_offset; 8097 unsigned int insn = bfd_get_32 (output_bfd, p); 8098 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2); 8099 if (insn != 0) 8100 bfd_put_32 (output_bfd, insn, p); 8101 break; 8102 } 8103 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8104 /* The TPREL16 relocs shouldn't really be used in shared 8105 libs as they will result in DT_TEXTREL being set, but 8106 support them anyway. */ 8107 goto dodyn; 8108 8109 case R_PPC_TPREL32: 8110 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8111 goto dodyn; 8112 8113 case R_PPC_DTPREL32: 8114 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8115 goto dodyn; 8116 8117 case R_PPC_DTPMOD32: 8118 relocation = 1; 8119 addend = 0; 8120 goto dodyn; 8121 8122 case R_PPC_REL16: 8123 case R_PPC_REL16_LO: 8124 case R_PPC_REL16_HI: 8125 case R_PPC_REL16_HA: 8126 break; 8127 8128 case R_PPC_REL32: 8129 if (h == NULL || h == htab->elf.hgot) 8130 break; 8131 /* fall through */ 8132 8133 case R_PPC_ADDR32: 8134 case R_PPC_ADDR16: 8135 case R_PPC_ADDR16_LO: 8136 case R_PPC_ADDR16_HI: 8137 case R_PPC_ADDR16_HA: 8138 case R_PPC_UADDR32: 8139 case R_PPC_UADDR16: 8140 goto dodyn; 8141 8142 case R_PPC_VLE_REL8: 8143 case R_PPC_VLE_REL15: 8144 case R_PPC_VLE_REL24: 8145 case R_PPC_REL24: 8146 case R_PPC_REL14: 8147 case R_PPC_REL14_BRTAKEN: 8148 case R_PPC_REL14_BRNTAKEN: 8149 /* If these relocations are not to a named symbol, they can be 8150 handled right here, no need to bother the dynamic linker. */ 8151 if (SYMBOL_CALLS_LOCAL (info, h) 8152 || h == htab->elf.hgot) 8153 break; 8154 /* fall through */ 8155 8156 case R_PPC_ADDR24: 8157 case R_PPC_ADDR14: 8158 case R_PPC_ADDR14_BRTAKEN: 8159 case R_PPC_ADDR14_BRNTAKEN: 8160 if (h != NULL && !info->shared) 8161 break; 8162 /* fall through */ 8163 8164 dodyn: 8165 if ((input_section->flags & SEC_ALLOC) == 0 8166 || is_vxworks_tls) 8167 break; 8168 8169 if ((info->shared 8170 && !(h != NULL 8171 && ((h->root.type == bfd_link_hash_undefined 8172 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN 8173 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) 8174 || (h->root.type == bfd_link_hash_undefweak 8175 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))) 8176 && (must_be_dyn_reloc (info, r_type) 8177 || !SYMBOL_CALLS_LOCAL (info, h))) 8178 || (ELIMINATE_COPY_RELOCS 8179 && !info->shared 8180 && h != NULL 8181 && h->dynindx != -1 8182 && !h->non_got_ref 8183 && !h->def_regular)) 8184 { 8185 int skip; 8186 bfd_byte * loc; 8187 #ifdef DEBUG 8188 fprintf (stderr, "ppc_elf_relocate_section needs to " 8189 "create relocation for %s\n", 8190 (h && h->root.root.string 8191 ? h->root.root.string : "<unknown>")); 8192 #endif 8193 8194 /* When generating a shared object, these relocations 8195 are copied into the output file to be resolved at run 8196 time. */ 8197 if (sreloc == NULL) 8198 { 8199 sreloc = elf_section_data (input_section)->sreloc; 8200 if (!htab->elf.dynamic_sections_created) 8201 sreloc = htab->reliplt; 8202 if (sreloc == NULL) 8203 return FALSE; 8204 } 8205 8206 skip = 0; 8207 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, 8208 input_section, 8209 rel->r_offset); 8210 if (outrel.r_offset == (bfd_vma) -1 8211 || outrel.r_offset == (bfd_vma) -2) 8212 skip = (int) outrel.r_offset; 8213 outrel.r_offset += (input_section->output_section->vma 8214 + input_section->output_offset); 8215 8216 if (skip) 8217 memset (&outrel, 0, sizeof outrel); 8218 else if ((h != NULL 8219 && (h->root.type == bfd_link_hash_undefined 8220 || h->root.type == bfd_link_hash_undefweak)) 8221 || !SYMBOL_REFERENCES_LOCAL (info, h)) 8222 { 8223 BFD_ASSERT (h->dynindx != -1); 8224 unresolved_reloc = FALSE; 8225 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); 8226 outrel.r_addend = rel->r_addend; 8227 } 8228 else 8229 { 8230 outrel.r_addend = relocation + rel->r_addend; 8231 8232 if (r_type != R_PPC_ADDR32) 8233 { 8234 long indx = 0; 8235 8236 if (ifunc != NULL) 8237 { 8238 /* If we get here when building a static 8239 executable, then the libc startup function 8240 responsible for applying indirect function 8241 relocations is going to complain about 8242 the reloc type. 8243 If we get here when building a dynamic 8244 executable, it will be because we have 8245 a text relocation. The dynamic loader 8246 will set the text segment writable and 8247 non-executable to apply text relocations. 8248 So we'll segfault when trying to run the 8249 indirection function to resolve the reloc. */ 8250 info->callbacks->einfo 8251 (_("%P: %H: relocation %s for indirect " 8252 "function %s unsupported\n"), 8253 input_bfd, input_section, rel->r_offset, 8254 howto->name, 8255 sym_name); 8256 ret = FALSE; 8257 } 8258 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) 8259 ; 8260 else if (sec == NULL || sec->owner == NULL) 8261 { 8262 bfd_set_error (bfd_error_bad_value); 8263 ret = FALSE; 8264 } 8265 else 8266 { 8267 asection *osec; 8268 8269 /* We are turning this relocation into one 8270 against a section symbol. It would be 8271 proper to subtract the symbol's value, 8272 osec->vma, from the emitted reloc addend, 8273 but ld.so expects buggy relocs. 8274 FIXME: Why not always use a zero index? */ 8275 osec = sec->output_section; 8276 indx = elf_section_data (osec)->dynindx; 8277 if (indx == 0) 8278 { 8279 osec = htab->elf.text_index_section; 8280 indx = elf_section_data (osec)->dynindx; 8281 } 8282 BFD_ASSERT (indx != 0); 8283 #ifdef DEBUG 8284 if (indx == 0) 8285 printf ("indx=%ld section=%s flags=%08x name=%s\n", 8286 indx, osec->name, osec->flags, 8287 h->root.root.string); 8288 #endif 8289 } 8290 8291 outrel.r_info = ELF32_R_INFO (indx, r_type); 8292 } 8293 else if (ifunc != NULL) 8294 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 8295 else 8296 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); 8297 } 8298 8299 loc = sreloc->contents; 8300 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); 8301 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); 8302 8303 if (skip == -1) 8304 continue; 8305 8306 /* This reloc will be computed at runtime. We clear the memory 8307 so that it contains predictable value. */ 8308 if (! skip 8309 && ((input_section->flags & SEC_ALLOC) != 0 8310 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) 8311 { 8312 relocation = howto->pc_relative ? outrel.r_offset : 0; 8313 addend = 0; 8314 break; 8315 } 8316 } 8317 break; 8318 8319 case R_PPC_RELAX_PLT: 8320 case R_PPC_RELAX_PLTREL24: 8321 if (h != NULL) 8322 { 8323 struct plt_entry *ent; 8324 bfd_vma got2_addend = 0; 8325 8326 if (r_type == R_PPC_RELAX_PLTREL24) 8327 { 8328 if (info->shared) 8329 got2_addend = addend; 8330 addend = 0; 8331 } 8332 ent = find_plt_ent (&h->plt.plist, got2, got2_addend); 8333 if (htab->plt_type == PLT_NEW) 8334 relocation = (htab->glink->output_section->vma 8335 + htab->glink->output_offset 8336 + ent->glink_offset); 8337 else 8338 relocation = (htab->plt->output_section->vma 8339 + htab->plt->output_offset 8340 + ent->plt.offset); 8341 } 8342 /* Fall thru */ 8343 8344 case R_PPC_RELAX: 8345 if (info->shared) 8346 relocation -= (input_section->output_section->vma 8347 + input_section->output_offset 8348 + rel->r_offset - 4); 8349 8350 { 8351 unsigned long t0; 8352 unsigned long t1; 8353 8354 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset); 8355 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4); 8356 8357 /* We're clearing the bits for R_PPC_ADDR16_HA 8358 and R_PPC_ADDR16_LO here. */ 8359 t0 &= ~0xffff; 8360 t1 &= ~0xffff; 8361 8362 /* t0 is HA, t1 is LO */ 8363 relocation += addend; 8364 t0 |= ((relocation + 0x8000) >> 16) & 0xffff; 8365 t1 |= relocation & 0xffff; 8366 8367 bfd_put_32 (output_bfd, t0, contents + rel->r_offset); 8368 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4); 8369 8370 /* Rewrite the reloc and convert one of the trailing nop 8371 relocs to describe this relocation. */ 8372 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE); 8373 /* The relocs are at the bottom 2 bytes */ 8374 rel[0].r_offset += 2; 8375 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel)); 8376 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA); 8377 rel[1].r_offset += 4; 8378 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO); 8379 rel++; 8380 } 8381 continue; 8382 8383 /* Indirect .sdata relocation. */ 8384 case R_PPC_EMB_SDAI16: 8385 BFD_ASSERT (htab->sdata[0].section != NULL); 8386 if (!is_static_defined (htab->sdata[0].sym)) 8387 { 8388 unresolved_reloc = TRUE; 8389 break; 8390 } 8391 relocation 8392 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], 8393 h, relocation, rel); 8394 addend = 0; 8395 break; 8396 8397 /* Indirect .sdata2 relocation. */ 8398 case R_PPC_EMB_SDA2I16: 8399 BFD_ASSERT (htab->sdata[1].section != NULL); 8400 if (!is_static_defined (htab->sdata[1].sym)) 8401 { 8402 unresolved_reloc = TRUE; 8403 break; 8404 } 8405 relocation 8406 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], 8407 h, relocation, rel); 8408 addend = 0; 8409 break; 8410 8411 /* Handle the TOC16 reloc. We want to use the offset within the .got 8412 section, not the actual VMA. This is appropriate when generating 8413 an embedded ELF object, for which the .got section acts like the 8414 AIX .toc section. */ 8415 case R_PPC_TOC16: /* phony GOT16 relocations */ 8416 if (sec == NULL || sec->output_section == NULL) 8417 { 8418 unresolved_reloc = TRUE; 8419 break; 8420 } 8421 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec), 8422 ".got") == 0 8423 || strcmp (bfd_get_section_name (sec->owner, sec), 8424 ".cgot") == 0); 8425 8426 addend -= sec->output_section->vma + sec->output_offset + 0x8000; 8427 break; 8428 8429 case R_PPC_PLTREL24: 8430 if (h != NULL && ifunc == NULL) 8431 { 8432 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2, 8433 info->shared ? addend : 0); 8434 if (ent == NULL 8435 || htab->plt == NULL) 8436 { 8437 /* We didn't make a PLT entry for this symbol. This 8438 happens when statically linking PIC code, or when 8439 using -Bsymbolic. */ 8440 } 8441 else 8442 { 8443 /* Relocation is to the entry for this symbol in the 8444 procedure linkage table. */ 8445 unresolved_reloc = FALSE; 8446 if (htab->plt_type == PLT_NEW) 8447 relocation = (htab->glink->output_section->vma 8448 + htab->glink->output_offset 8449 + ent->glink_offset); 8450 else 8451 relocation = (htab->plt->output_section->vma 8452 + htab->plt->output_offset 8453 + ent->plt.offset); 8454 } 8455 } 8456 8457 /* R_PPC_PLTREL24 is rather special. If non-zero, the 8458 addend specifies the GOT pointer offset within .got2. 8459 Don't apply it to the relocation field. */ 8460 addend = 0; 8461 break; 8462 8463 /* Relocate against _SDA_BASE_. */ 8464 case R_PPC_SDAREL16: 8465 { 8466 const char *name; 8467 struct elf_link_hash_entry *sda = htab->sdata[0].sym; 8468 8469 if (sec == NULL 8470 || sec->output_section == NULL 8471 || !is_static_defined (sda)) 8472 { 8473 unresolved_reloc = TRUE; 8474 break; 8475 } 8476 addend -= SYM_VAL (sda); 8477 8478 name = bfd_get_section_name (output_bfd, sec->output_section); 8479 if (! ((CONST_STRNEQ (name, ".sdata") 8480 && (name[6] == 0 || name[6] == '.')) 8481 || (CONST_STRNEQ (name, ".sbss") 8482 && (name[5] == 0 || name[5] == '.')))) 8483 { 8484 info->callbacks->einfo 8485 (_("%P: %B: the target (%s) of a %s relocation is " 8486 "in the wrong output section (%s)\n"), 8487 input_bfd, 8488 sym_name, 8489 howto->name, 8490 name); 8491 } 8492 } 8493 break; 8494 8495 /* Relocate against _SDA2_BASE_. */ 8496 case R_PPC_EMB_SDA2REL: 8497 { 8498 const char *name; 8499 struct elf_link_hash_entry *sda = htab->sdata[1].sym; 8500 8501 if (sec == NULL 8502 || sec->output_section == NULL 8503 || !is_static_defined (sda)) 8504 { 8505 unresolved_reloc = TRUE; 8506 break; 8507 } 8508 addend -= SYM_VAL (sda); 8509 8510 name = bfd_get_section_name (output_bfd, sec->output_section); 8511 if (! (CONST_STRNEQ (name, ".sdata2") 8512 || CONST_STRNEQ (name, ".sbss2"))) 8513 { 8514 info->callbacks->einfo 8515 (_("%P: %B: the target (%s) of a %s relocation is " 8516 "in the wrong output section (%s)\n"), 8517 input_bfd, 8518 sym_name, 8519 howto->name, 8520 name); 8521 } 8522 } 8523 break; 8524 8525 case R_PPC_VLE_LO16A: 8526 relocation = (relocation + addend) & 0xffff; 8527 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8528 relocation, split16a_type); 8529 continue; 8530 8531 case R_PPC_VLE_LO16D: 8532 relocation = (relocation + addend) & 0xffff; 8533 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8534 relocation, split16d_type); 8535 continue; 8536 8537 case R_PPC_VLE_HI16A: 8538 relocation = ((relocation + addend) >> 16) & 0xffff; 8539 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8540 relocation, split16a_type); 8541 continue; 8542 8543 case R_PPC_VLE_HI16D: 8544 relocation = ((relocation + addend) >> 16) & 0xffff; 8545 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8546 relocation, split16d_type); 8547 continue; 8548 8549 case R_PPC_VLE_HA16A: 8550 { 8551 bfd_vma value = relocation + addend; 8552 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); 8553 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8554 value, split16a_type); 8555 } 8556 continue; 8557 8558 case R_PPC_VLE_HA16D: 8559 { 8560 bfd_vma value = relocation + addend; 8561 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); 8562 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8563 value, split16d_type); 8564 } 8565 continue; 8566 8567 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ 8568 case R_PPC_EMB_SDA21: 8569 case R_PPC_VLE_SDA21: 8570 case R_PPC_EMB_RELSDA: 8571 case R_PPC_VLE_SDA21_LO: 8572 { 8573 const char *name; 8574 int reg; 8575 struct elf_link_hash_entry *sda = NULL; 8576 8577 if (sec == NULL || sec->output_section == NULL) 8578 { 8579 unresolved_reloc = TRUE; 8580 break; 8581 } 8582 8583 name = bfd_get_section_name (output_bfd, sec->output_section); 8584 if (((CONST_STRNEQ (name, ".sdata") 8585 && (name[6] == 0 || name[6] == '.')) 8586 || (CONST_STRNEQ (name, ".sbss") 8587 && (name[5] == 0 || name[5] == '.')))) 8588 { 8589 reg = 13; 8590 sda = htab->sdata[0].sym; 8591 } 8592 else if (CONST_STRNEQ (name, ".sdata2") 8593 || CONST_STRNEQ (name, ".sbss2")) 8594 { 8595 reg = 2; 8596 sda = htab->sdata[1].sym; 8597 } 8598 else if (strcmp (name, ".PPC.EMB.sdata0") == 0 8599 || strcmp (name, ".PPC.EMB.sbss0") == 0) 8600 { 8601 reg = 0; 8602 } 8603 else 8604 { 8605 info->callbacks->einfo 8606 (_("%P: %B: the target (%s) of a %s relocation is " 8607 "in the wrong output section (%s)\n"), 8608 input_bfd, 8609 sym_name, 8610 howto->name, 8611 name); 8612 8613 bfd_set_error (bfd_error_bad_value); 8614 ret = FALSE; 8615 continue; 8616 } 8617 8618 if (sda != NULL) 8619 { 8620 if (!is_static_defined (sda)) 8621 { 8622 unresolved_reloc = TRUE; 8623 break; 8624 } 8625 addend -= SYM_VAL (sda); 8626 } 8627 8628 if (reg == 0 8629 && (r_type == R_PPC_VLE_SDA21 8630 || r_type == R_PPC_VLE_SDA21_LO)) 8631 { 8632 /* Use the split20 format. */ 8633 bfd_vma insn, bits12to15, bits21to31; 8634 bfd_vma value = (relocation + rel->r_offset) & 0xffff; 8635 /* Propagate sign bit, if necessary. */ 8636 insn = (value & 0x8000) ? 0x70107800 : 0x70000000; 8637 bits12to15 = value & 0x700; 8638 bits21to31 = value & 0x7ff; 8639 insn |= bits12to15; 8640 insn |= bits21to31; 8641 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 8642 continue; 8643 } 8644 else if (r_type == R_PPC_EMB_SDA21 8645 || r_type == R_PPC_VLE_SDA21 8646 || r_type == R_PPC_VLE_SDA21_LO) 8647 { 8648 bfd_vma insn; /* Fill in register field. */ 8649 8650 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 8651 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); 8652 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 8653 } 8654 } 8655 break; 8656 8657 case R_PPC_VLE_SDAREL_LO16A: 8658 case R_PPC_VLE_SDAREL_LO16D: 8659 case R_PPC_VLE_SDAREL_HI16A: 8660 case R_PPC_VLE_SDAREL_HI16D: 8661 case R_PPC_VLE_SDAREL_HA16A: 8662 case R_PPC_VLE_SDAREL_HA16D: 8663 { 8664 bfd_vma value; 8665 const char *name; 8666 //int reg; 8667 struct elf_link_hash_entry *sda = NULL; 8668 8669 if (sec == NULL || sec->output_section == NULL) 8670 { 8671 unresolved_reloc = TRUE; 8672 break; 8673 } 8674 8675 name = bfd_get_section_name (output_bfd, sec->output_section); 8676 if (((CONST_STRNEQ (name, ".sdata") 8677 && (name[6] == 0 || name[6] == '.')) 8678 || (CONST_STRNEQ (name, ".sbss") 8679 && (name[5] == 0 || name[5] == '.')))) 8680 { 8681 //reg = 13; 8682 sda = htab->sdata[0].sym; 8683 } 8684 else if (CONST_STRNEQ (name, ".sdata2") 8685 || CONST_STRNEQ (name, ".sbss2")) 8686 { 8687 //reg = 2; 8688 sda = htab->sdata[1].sym; 8689 } 8690 else 8691 { 8692 (*_bfd_error_handler) 8693 (_("%B: the target (%s) of a %s relocation is " 8694 "in the wrong output section (%s)"), 8695 input_bfd, 8696 sym_name, 8697 howto->name, 8698 name); 8699 8700 bfd_set_error (bfd_error_bad_value); 8701 ret = FALSE; 8702 continue; 8703 } 8704 8705 if (sda != NULL) 8706 { 8707 if (!is_static_defined (sda)) 8708 { 8709 unresolved_reloc = TRUE; 8710 break; 8711 } 8712 } 8713 8714 value = sda->root.u.def.section->output_section->vma 8715 + sda->root.u.def.section->output_offset; 8716 8717 if (r_type == R_PPC_VLE_SDAREL_LO16A) 8718 { 8719 value = (value + addend) & 0xffff; 8720 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8721 value, split16a_type); 8722 } 8723 else if (r_type == R_PPC_VLE_SDAREL_LO16D) 8724 { 8725 value = (value + addend) & 0xffff; 8726 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8727 value, split16d_type); 8728 } 8729 else if (r_type == R_PPC_VLE_SDAREL_HI16A) 8730 { 8731 value = ((value + addend) >> 16) & 0xffff; 8732 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8733 value, split16a_type); 8734 } 8735 else if (r_type == R_PPC_VLE_SDAREL_HI16D) 8736 { 8737 value = ((value + addend) >> 16) & 0xffff; 8738 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8739 value, split16d_type); 8740 } 8741 else if (r_type == R_PPC_VLE_SDAREL_HA16A) 8742 { 8743 value += addend; 8744 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); 8745 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8746 value, split16a_type); 8747 } 8748 else if (r_type == R_PPC_VLE_SDAREL_HA16D) 8749 { 8750 value += addend; 8751 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff); 8752 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset, 8753 value, split16d_type); 8754 } 8755 } 8756 continue; 8757 8758 /* Relocate against the beginning of the section. */ 8759 case R_PPC_SECTOFF: 8760 case R_PPC_SECTOFF_LO: 8761 case R_PPC_SECTOFF_HI: 8762 case R_PPC_SECTOFF_HA: 8763 if (sec == NULL || sec->output_section == NULL) 8764 { 8765 unresolved_reloc = TRUE; 8766 break; 8767 } 8768 addend -= sec->output_section->vma; 8769 break; 8770 8771 /* Negative relocations. */ 8772 case R_PPC_EMB_NADDR32: 8773 case R_PPC_EMB_NADDR16: 8774 case R_PPC_EMB_NADDR16_LO: 8775 case R_PPC_EMB_NADDR16_HI: 8776 case R_PPC_EMB_NADDR16_HA: 8777 addend -= 2 * relocation; 8778 break; 8779 8780 case R_PPC_COPY: 8781 case R_PPC_GLOB_DAT: 8782 case R_PPC_JMP_SLOT: 8783 case R_PPC_RELATIVE: 8784 case R_PPC_IRELATIVE: 8785 case R_PPC_PLT32: 8786 case R_PPC_PLTREL32: 8787 case R_PPC_PLT16_LO: 8788 case R_PPC_PLT16_HI: 8789 case R_PPC_PLT16_HA: 8790 case R_PPC_ADDR30: 8791 case R_PPC_EMB_RELSEC16: 8792 case R_PPC_EMB_RELST_LO: 8793 case R_PPC_EMB_RELST_HI: 8794 case R_PPC_EMB_RELST_HA: 8795 case R_PPC_EMB_BIT_FLD: 8796 info->callbacks->einfo 8797 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"), 8798 input_bfd, 8799 howto->name, 8800 sym_name); 8801 8802 bfd_set_error (bfd_error_invalid_operation); 8803 ret = FALSE; 8804 continue; 8805 } 8806 8807 /* Do any further special processing. */ 8808 switch (r_type) 8809 { 8810 default: 8811 break; 8812 8813 case R_PPC_ADDR16_HA: 8814 case R_PPC_REL16_HA: 8815 case R_PPC_SECTOFF_HA: 8816 case R_PPC_TPREL16_HA: 8817 case R_PPC_DTPREL16_HA: 8818 case R_PPC_EMB_NADDR16_HA: 8819 case R_PPC_EMB_RELST_HA: 8820 /* It's just possible that this symbol is a weak symbol 8821 that's not actually defined anywhere. In that case, 8822 'sec' would be NULL, and we should leave the symbol 8823 alone (it will be set to zero elsewhere in the link). */ 8824 if (sec == NULL) 8825 break; 8826 /* Fall thru */ 8827 8828 case R_PPC_PLT16_HA: 8829 case R_PPC_GOT16_HA: 8830 case R_PPC_GOT_TLSGD16_HA: 8831 case R_PPC_GOT_TLSLD16_HA: 8832 case R_PPC_GOT_TPREL16_HA: 8833 case R_PPC_GOT_DTPREL16_HA: 8834 /* Add 0x10000 if sign bit in 0:15 is set. 8835 Bits 0:15 are not used. */ 8836 addend += 0x8000; 8837 break; 8838 8839 case R_PPC_ADDR16: 8840 case R_PPC_ADDR16_LO: 8841 case R_PPC_GOT16: 8842 case R_PPC_GOT16_LO: 8843 case R_PPC_SDAREL16: 8844 case R_PPC_SECTOFF: 8845 case R_PPC_SECTOFF_LO: 8846 case R_PPC_DTPREL16: 8847 case R_PPC_DTPREL16_LO: 8848 case R_PPC_TPREL16: 8849 case R_PPC_TPREL16_LO: 8850 case R_PPC_GOT_TLSGD16: 8851 case R_PPC_GOT_TLSGD16_LO: 8852 case R_PPC_GOT_TLSLD16: 8853 case R_PPC_GOT_TLSLD16_LO: 8854 case R_PPC_GOT_DTPREL16: 8855 case R_PPC_GOT_DTPREL16_LO: 8856 case R_PPC_GOT_TPREL16: 8857 case R_PPC_GOT_TPREL16_LO: 8858 { 8859 /* The 32-bit ABI lacks proper relocations to deal with 8860 certain 64-bit instructions. Prevent damage to bits 8861 that make up part of the insn opcode. */ 8862 unsigned int insn, mask, lobit; 8863 8864 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); 8865 mask = 0; 8866 if (is_insn_ds_form (insn)) 8867 mask = 3; 8868 else if (is_insn_dq_form (insn)) 8869 mask = 15; 8870 else 8871 break; 8872 lobit = mask & (relocation + addend); 8873 if (lobit != 0) 8874 { 8875 addend -= lobit; 8876 info->callbacks->einfo 8877 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"), 8878 input_bfd, input_section, rel->r_offset, 8879 howto->name, sym_name, mask + 1); 8880 bfd_set_error (bfd_error_bad_value); 8881 ret = FALSE; 8882 } 8883 addend += insn & mask; 8884 } 8885 break; 8886 } 8887 8888 #ifdef DEBUG 8889 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " 8890 "offset = %ld, addend = %ld\n", 8891 howto->name, 8892 (int) r_type, 8893 sym_name, 8894 r_symndx, 8895 (long) rel->r_offset, 8896 (long) addend); 8897 #endif 8898 8899 if (unresolved_reloc 8900 && !((input_section->flags & SEC_DEBUGGING) != 0 8901 && h->def_dynamic) 8902 && _bfd_elf_section_offset (output_bfd, info, input_section, 8903 rel->r_offset) != (bfd_vma) -1) 8904 { 8905 info->callbacks->einfo 8906 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"), 8907 input_bfd, input_section, rel->r_offset, 8908 howto->name, 8909 sym_name); 8910 ret = FALSE; 8911 } 8912 8913 r = _bfd_final_link_relocate (howto, 8914 input_bfd, 8915 input_section, 8916 contents, 8917 rel->r_offset, 8918 relocation, 8919 addend); 8920 8921 if (r != bfd_reloc_ok) 8922 { 8923 if (r == bfd_reloc_overflow) 8924 { 8925 if (warned) 8926 continue; 8927 if (h != NULL 8928 && h->root.type == bfd_link_hash_undefweak 8929 && howto->pc_relative) 8930 { 8931 /* Assume this is a call protected by other code that 8932 detect the symbol is undefined. If this is the case, 8933 we can safely ignore the overflow. If not, the 8934 program is hosed anyway, and a little warning isn't 8935 going to help. */ 8936 8937 continue; 8938 } 8939 8940 if (! (*info->callbacks->reloc_overflow) (info, 8941 (h ? &h->root : NULL), 8942 sym_name, 8943 howto->name, 8944 rel->r_addend, 8945 input_bfd, 8946 input_section, 8947 rel->r_offset)) 8948 return FALSE; 8949 } 8950 else 8951 { 8952 info->callbacks->einfo 8953 (_("%P: %H: %s reloc against `%s': error %d\n"), 8954 input_bfd, input_section, rel->r_offset, 8955 howto->name, sym_name, (int) r); 8956 ret = FALSE; 8957 } 8958 } 8959 } 8960 8961 #ifdef DEBUG 8962 fprintf (stderr, "\n"); 8963 #endif 8964 8965 return ret; 8966 } 8967 8968 /* Finish up dynamic symbol handling. We set the contents of various 8970 dynamic sections here. */ 8971 8972 static bfd_boolean 8973 ppc_elf_finish_dynamic_symbol (bfd *output_bfd, 8974 struct bfd_link_info *info, 8975 struct elf_link_hash_entry *h, 8976 Elf_Internal_Sym *sym) 8977 { 8978 struct ppc_elf_link_hash_table *htab; 8979 struct plt_entry *ent; 8980 bfd_boolean doneone; 8981 8982 #ifdef DEBUG 8983 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", 8984 h->root.root.string); 8985 #endif 8986 8987 htab = ppc_elf_hash_table (info); 8988 BFD_ASSERT (htab->elf.dynobj != NULL); 8989 8990 doneone = FALSE; 8991 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 8992 if (ent->plt.offset != (bfd_vma) -1) 8993 { 8994 if (!doneone) 8995 { 8996 Elf_Internal_Rela rela; 8997 bfd_byte *loc; 8998 bfd_vma reloc_index; 8999 9000 if (htab->plt_type == PLT_NEW 9001 || !htab->elf.dynamic_sections_created 9002 || h->dynindx == -1) 9003 reloc_index = ent->plt.offset / 4; 9004 else 9005 { 9006 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) 9007 / htab->plt_slot_size); 9008 if (reloc_index > PLT_NUM_SINGLE_ENTRIES 9009 && htab->plt_type == PLT_OLD) 9010 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; 9011 } 9012 9013 /* This symbol has an entry in the procedure linkage table. 9014 Set it up. */ 9015 if (htab->plt_type == PLT_VXWORKS 9016 && htab->elf.dynamic_sections_created 9017 && h->dynindx != -1) 9018 { 9019 bfd_vma got_offset; 9020 const bfd_vma *plt_entry; 9021 9022 /* The first three entries in .got.plt are reserved. */ 9023 got_offset = (reloc_index + 3) * 4; 9024 9025 /* Use the right PLT. */ 9026 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry 9027 : ppc_elf_vxworks_plt_entry; 9028 9029 /* Fill in the .plt on VxWorks. */ 9030 if (info->shared) 9031 { 9032 bfd_put_32 (output_bfd, 9033 plt_entry[0] | PPC_HA (got_offset), 9034 htab->plt->contents + ent->plt.offset + 0); 9035 bfd_put_32 (output_bfd, 9036 plt_entry[1] | PPC_LO (got_offset), 9037 htab->plt->contents + ent->plt.offset + 4); 9038 } 9039 else 9040 { 9041 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot); 9042 9043 bfd_put_32 (output_bfd, 9044 plt_entry[0] | PPC_HA (got_loc), 9045 htab->plt->contents + ent->plt.offset + 0); 9046 bfd_put_32 (output_bfd, 9047 plt_entry[1] | PPC_LO (got_loc), 9048 htab->plt->contents + ent->plt.offset + 4); 9049 } 9050 9051 bfd_put_32 (output_bfd, plt_entry[2], 9052 htab->plt->contents + ent->plt.offset + 8); 9053 bfd_put_32 (output_bfd, plt_entry[3], 9054 htab->plt->contents + ent->plt.offset + 12); 9055 9056 /* This instruction is an immediate load. The value loaded is 9057 the byte offset of the R_PPC_JMP_SLOT relocation from the 9058 start of the .rela.plt section. The value is stored in the 9059 low-order 16 bits of the load instruction. */ 9060 /* NOTE: It appears that this is now an index rather than a 9061 prescaled offset. */ 9062 bfd_put_32 (output_bfd, 9063 plt_entry[4] | reloc_index, 9064 htab->plt->contents + ent->plt.offset + 16); 9065 /* This instruction is a PC-relative branch whose target is 9066 the start of the PLT section. The address of this branch 9067 instruction is 20 bytes beyond the start of this PLT entry. 9068 The address is encoded in bits 6-29, inclusive. The value 9069 stored is right-shifted by two bits, permitting a 26-bit 9070 offset. */ 9071 bfd_put_32 (output_bfd, 9072 (plt_entry[5] 9073 | (-(ent->plt.offset + 20) & 0x03fffffc)), 9074 htab->plt->contents + ent->plt.offset + 20); 9075 bfd_put_32 (output_bfd, plt_entry[6], 9076 htab->plt->contents + ent->plt.offset + 24); 9077 bfd_put_32 (output_bfd, plt_entry[7], 9078 htab->plt->contents + ent->plt.offset + 28); 9079 9080 /* Fill in the GOT entry corresponding to this PLT slot with 9081 the address immediately after the "bctr" instruction 9082 in this PLT entry. */ 9083 bfd_put_32 (output_bfd, (htab->plt->output_section->vma 9084 + htab->plt->output_offset 9085 + ent->plt.offset + 16), 9086 htab->sgotplt->contents + got_offset); 9087 9088 if (!info->shared) 9089 { 9090 /* Fill in a couple of entries in .rela.plt.unloaded. */ 9091 loc = htab->srelplt2->contents 9092 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index 9093 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS) 9094 * sizeof (Elf32_External_Rela)); 9095 9096 /* Provide the @ha relocation for the first instruction. */ 9097 rela.r_offset = (htab->plt->output_section->vma 9098 + htab->plt->output_offset 9099 + ent->plt.offset + 2); 9100 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 9101 R_PPC_ADDR16_HA); 9102 rela.r_addend = got_offset; 9103 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9104 loc += sizeof (Elf32_External_Rela); 9105 9106 /* Provide the @l relocation for the second instruction. */ 9107 rela.r_offset = (htab->plt->output_section->vma 9108 + htab->plt->output_offset 9109 + ent->plt.offset + 6); 9110 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, 9111 R_PPC_ADDR16_LO); 9112 rela.r_addend = got_offset; 9113 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9114 loc += sizeof (Elf32_External_Rela); 9115 9116 /* Provide a relocation for the GOT entry corresponding to this 9117 PLT slot. Point it at the middle of the .plt entry. */ 9118 rela.r_offset = (htab->sgotplt->output_section->vma 9119 + htab->sgotplt->output_offset 9120 + got_offset); 9121 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx, 9122 R_PPC_ADDR32); 9123 rela.r_addend = ent->plt.offset + 16; 9124 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9125 } 9126 9127 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT. 9128 In particular, the offset for the relocation is not the 9129 address of the PLT entry for this function, as specified 9130 by the ABI. Instead, the offset is set to the address of 9131 the GOT slot for this function. See EABI 4.4.4.1. */ 9132 rela.r_offset = (htab->sgotplt->output_section->vma 9133 + htab->sgotplt->output_offset 9134 + got_offset); 9135 9136 } 9137 else 9138 { 9139 asection *splt = htab->plt; 9140 if (!htab->elf.dynamic_sections_created 9141 || h->dynindx == -1) 9142 splt = htab->iplt; 9143 9144 rela.r_offset = (splt->output_section->vma 9145 + splt->output_offset 9146 + ent->plt.offset); 9147 if (htab->plt_type == PLT_OLD 9148 || !htab->elf.dynamic_sections_created 9149 || h->dynindx == -1) 9150 { 9151 /* We don't need to fill in the .plt. The ppc dynamic 9152 linker will fill it in. */ 9153 } 9154 else 9155 { 9156 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset 9157 + htab->glink->output_section->vma 9158 + htab->glink->output_offset); 9159 bfd_put_32 (output_bfd, val, 9160 splt->contents + ent->plt.offset); 9161 } 9162 } 9163 9164 /* Fill in the entry in the .rela.plt section. */ 9165 rela.r_addend = 0; 9166 if (!htab->elf.dynamic_sections_created 9167 || h->dynindx == -1) 9168 { 9169 BFD_ASSERT (h->type == STT_GNU_IFUNC 9170 && h->def_regular 9171 && (h->root.type == bfd_link_hash_defined 9172 || h->root.type == bfd_link_hash_defweak)); 9173 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE); 9174 rela.r_addend = SYM_VAL (h); 9175 } 9176 else 9177 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); 9178 9179 if (!htab->elf.dynamic_sections_created 9180 || h->dynindx == -1) 9181 loc = (htab->reliplt->contents 9182 + (htab->reliplt->reloc_count++ 9183 * sizeof (Elf32_External_Rela))); 9184 else 9185 loc = (htab->relplt->contents 9186 + reloc_index * sizeof (Elf32_External_Rela)); 9187 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9188 9189 if (!h->def_regular) 9190 { 9191 /* Mark the symbol as undefined, rather than as 9192 defined in the .plt section. Leave the value if 9193 there were any relocations where pointer equality 9194 matters (this is a clue for the dynamic linker, to 9195 make function pointer comparisons work between an 9196 application and shared library), otherwise set it 9197 to zero. */ 9198 sym->st_shndx = SHN_UNDEF; 9199 if (!h->pointer_equality_needed) 9200 sym->st_value = 0; 9201 else if (!h->ref_regular_nonweak) 9202 { 9203 /* This breaks function pointer comparisons, but 9204 that is better than breaking tests for a NULL 9205 function pointer. */ 9206 sym->st_value = 0; 9207 } 9208 } 9209 else if (h->type == STT_GNU_IFUNC 9210 && !info->shared) 9211 { 9212 /* Set the value of ifunc symbols in a non-pie 9213 executable to the glink entry. This is to avoid 9214 text relocations. We can't do this for ifunc in 9215 allocate_dynrelocs, as we do for normal dynamic 9216 function symbols with plt entries, because we need 9217 to keep the original value around for the ifunc 9218 relocation. */ 9219 sym->st_shndx = (_bfd_elf_section_from_bfd_section 9220 (output_bfd, htab->glink->output_section)); 9221 sym->st_value = (ent->glink_offset 9222 + htab->glink->output_offset 9223 + htab->glink->output_section->vma); 9224 } 9225 doneone = TRUE; 9226 } 9227 9228 if (htab->plt_type == PLT_NEW 9229 || !htab->elf.dynamic_sections_created 9230 || h->dynindx == -1) 9231 { 9232 unsigned char *p; 9233 asection *splt = htab->plt; 9234 if (!htab->elf.dynamic_sections_created 9235 || h->dynindx == -1) 9236 splt = htab->iplt; 9237 9238 p = (unsigned char *) htab->glink->contents + ent->glink_offset; 9239 9240 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt) 9241 { 9242 bfd_put_32 (output_bfd, LWZ_11_3, p); 9243 p += 4; 9244 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p); 9245 p += 4; 9246 bfd_put_32 (output_bfd, MR_0_3, p); 9247 p += 4; 9248 bfd_put_32 (output_bfd, CMPWI_11_0, p); 9249 p += 4; 9250 bfd_put_32 (output_bfd, ADD_3_12_2, p); 9251 p += 4; 9252 bfd_put_32 (output_bfd, BEQLR, p); 9253 p += 4; 9254 bfd_put_32 (output_bfd, MR_3_0, p); 9255 p += 4; 9256 bfd_put_32 (output_bfd, NOP, p); 9257 p += 4; 9258 } 9259 9260 write_glink_stub (ent, splt, p, info); 9261 9262 if (!info->shared) 9263 /* We only need one non-PIC glink stub. */ 9264 break; 9265 } 9266 else 9267 break; 9268 } 9269 9270 if (h->needs_copy) 9271 { 9272 asection *s; 9273 Elf_Internal_Rela rela; 9274 bfd_byte *loc; 9275 9276 /* This symbols needs a copy reloc. Set it up. */ 9277 9278 #ifdef DEBUG 9279 fprintf (stderr, ", copy"); 9280 #endif 9281 9282 BFD_ASSERT (h->dynindx != -1); 9283 9284 if (ppc_elf_hash_entry (h)->has_sda_refs) 9285 s = htab->relsbss; 9286 else 9287 s = htab->relbss; 9288 BFD_ASSERT (s != NULL); 9289 9290 rela.r_offset = SYM_VAL (h); 9291 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); 9292 rela.r_addend = 0; 9293 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); 9294 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9295 } 9296 9297 #ifdef DEBUG 9298 fprintf (stderr, "\n"); 9299 #endif 9300 9301 return TRUE; 9302 } 9303 9304 static enum elf_reloc_type_class 9306 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela) 9307 { 9308 switch (ELF32_R_TYPE (rela->r_info)) 9309 { 9310 case R_PPC_RELATIVE: 9311 return reloc_class_relative; 9312 case R_PPC_REL24: 9313 case R_PPC_ADDR24: 9314 case R_PPC_JMP_SLOT: 9315 return reloc_class_plt; 9316 case R_PPC_COPY: 9317 return reloc_class_copy; 9318 default: 9319 return reloc_class_normal; 9320 } 9321 } 9322 9323 /* Finish up the dynamic sections. */ 9325 9326 static bfd_boolean 9327 ppc_elf_finish_dynamic_sections (bfd *output_bfd, 9328 struct bfd_link_info *info) 9329 { 9330 asection *sdyn; 9331 asection *splt; 9332 struct ppc_elf_link_hash_table *htab; 9333 bfd_vma got; 9334 bfd *dynobj; 9335 bfd_boolean ret = TRUE; 9336 9337 #ifdef DEBUG 9338 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); 9339 #endif 9340 9341 htab = ppc_elf_hash_table (info); 9342 dynobj = elf_hash_table (info)->dynobj; 9343 sdyn = bfd_get_linker_section (dynobj, ".dynamic"); 9344 if (htab->is_vxworks) 9345 splt = bfd_get_linker_section (dynobj, ".plt"); 9346 else 9347 splt = NULL; 9348 9349 got = 0; 9350 if (htab->elf.hgot != NULL) 9351 got = SYM_VAL (htab->elf.hgot); 9352 9353 if (htab->elf.dynamic_sections_created) 9354 { 9355 Elf32_External_Dyn *dyncon, *dynconend; 9356 9357 BFD_ASSERT (htab->plt != NULL && sdyn != NULL); 9358 9359 dyncon = (Elf32_External_Dyn *) sdyn->contents; 9360 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); 9361 for (; dyncon < dynconend; dyncon++) 9362 { 9363 Elf_Internal_Dyn dyn; 9364 asection *s; 9365 9366 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); 9367 9368 switch (dyn.d_tag) 9369 { 9370 case DT_PLTGOT: 9371 if (htab->is_vxworks) 9372 s = htab->sgotplt; 9373 else 9374 s = htab->plt; 9375 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 9376 break; 9377 9378 case DT_PLTRELSZ: 9379 dyn.d_un.d_val = htab->relplt->size; 9380 break; 9381 9382 case DT_JMPREL: 9383 s = htab->relplt; 9384 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 9385 break; 9386 9387 case DT_PPC_GOT: 9388 dyn.d_un.d_ptr = got; 9389 break; 9390 9391 case DT_RELASZ: 9392 if (htab->is_vxworks) 9393 { 9394 if (htab->relplt) 9395 dyn.d_un.d_ptr -= htab->relplt->size; 9396 break; 9397 } 9398 continue; 9399 9400 default: 9401 if (htab->is_vxworks 9402 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) 9403 break; 9404 continue; 9405 } 9406 9407 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); 9408 } 9409 } 9410 9411 if (htab->got != NULL) 9412 { 9413 if (htab->elf.hgot->root.u.def.section == htab->got 9414 || htab->elf.hgot->root.u.def.section == htab->sgotplt) 9415 { 9416 unsigned char *p = htab->elf.hgot->root.u.def.section->contents; 9417 9418 p += htab->elf.hgot->root.u.def.value; 9419 if (htab->plt_type == PLT_OLD) 9420 { 9421 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 9422 so that a function can easily find the address of 9423 _GLOBAL_OFFSET_TABLE_. */ 9424 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4 9425 < htab->elf.hgot->root.u.def.section->size); 9426 bfd_put_32 (output_bfd, 0x4e800021, p - 4); 9427 } 9428 9429 if (sdyn != NULL) 9430 { 9431 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset; 9432 BFD_ASSERT (htab->elf.hgot->root.u.def.value 9433 < htab->elf.hgot->root.u.def.section->size); 9434 bfd_put_32 (output_bfd, val, p); 9435 } 9436 } 9437 else 9438 { 9439 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"), 9440 htab->elf.hgot->root.root.string, 9441 (htab->sgotplt != NULL 9442 ? htab->sgotplt->name : htab->got->name)); 9443 bfd_set_error (bfd_error_bad_value); 9444 ret = FALSE; 9445 } 9446 9447 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; 9448 } 9449 9450 /* Fill in the first entry in the VxWorks procedure linkage table. */ 9451 if (splt && splt->size > 0) 9452 { 9453 /* Use the right PLT. */ 9454 const bfd_vma *plt_entry = (info->shared 9455 ? ppc_elf_vxworks_pic_plt0_entry 9456 : ppc_elf_vxworks_plt0_entry); 9457 9458 if (!info->shared) 9459 { 9460 bfd_vma got_value = SYM_VAL (htab->elf.hgot); 9461 9462 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value), 9463 splt->contents + 0); 9464 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value), 9465 splt->contents + 4); 9466 } 9467 else 9468 { 9469 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0); 9470 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4); 9471 } 9472 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8); 9473 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12); 9474 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16); 9475 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20); 9476 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24); 9477 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28); 9478 9479 if (! info->shared) 9480 { 9481 Elf_Internal_Rela rela; 9482 bfd_byte *loc; 9483 9484 loc = htab->srelplt2->contents; 9485 9486 /* Output the @ha relocation for the first instruction. */ 9487 rela.r_offset = (htab->plt->output_section->vma 9488 + htab->plt->output_offset 9489 + 2); 9490 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 9491 rela.r_addend = 0; 9492 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9493 loc += sizeof (Elf32_External_Rela); 9494 9495 /* Output the @l relocation for the second instruction. */ 9496 rela.r_offset = (htab->plt->output_section->vma 9497 + htab->plt->output_offset 9498 + 6); 9499 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 9500 rela.r_addend = 0; 9501 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); 9502 loc += sizeof (Elf32_External_Rela); 9503 9504 /* Fix up the remaining relocations. They may have the wrong 9505 symbol index for _G_O_T_ or _P_L_T_ depending on the order 9506 in which symbols were output. */ 9507 while (loc < htab->srelplt2->contents + htab->srelplt2->size) 9508 { 9509 Elf_Internal_Rela rel; 9510 9511 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 9512 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA); 9513 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 9514 loc += sizeof (Elf32_External_Rela); 9515 9516 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 9517 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO); 9518 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 9519 loc += sizeof (Elf32_External_Rela); 9520 9521 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel); 9522 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32); 9523 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); 9524 loc += sizeof (Elf32_External_Rela); 9525 } 9526 } 9527 } 9528 9529 if (htab->glink != NULL 9530 && htab->glink->contents != NULL 9531 && htab->elf.dynamic_sections_created) 9532 { 9533 unsigned char *p; 9534 unsigned char *endp; 9535 bfd_vma res0; 9536 unsigned int i; 9537 9538 /* 9539 * PIC glink code is the following: 9540 * 9541 * # ith PLT code stub. 9542 * addis 11,30,(plt+(i-1)*4-got)@ha 9543 * lwz 11,(plt+(i-1)*4-got)@l(11) 9544 * mtctr 11 9545 * bctr 9546 * 9547 * # A table of branches, one for each plt entry. 9548 * # The idea is that the plt call stub loads ctr and r11 with these 9549 * # addresses, so (r11 - res_0) gives the plt index * 4. 9550 * res_0: b PLTresolve 9551 * res_1: b PLTresolve 9552 * . 9553 * # Some number of entries towards the end can be nops 9554 * res_n_m3: nop 9555 * res_n_m2: nop 9556 * res_n_m1: 9557 * 9558 * PLTresolve: 9559 * addis 11,11,(1f-res_0)@ha 9560 * mflr 0 9561 * bcl 20,31,1f 9562 * 1: addi 11,11,(1b-res_0)@l 9563 * mflr 12 9564 * mtlr 0 9565 * sub 11,11,12 # r11 = index * 4 9566 * addis 12,12,(got+4-1b)@ha 9567 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve 9568 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address 9569 * mtctr 0 9570 * add 0,11,11 9571 * add 11,0,11 # r11 = index * 12 = reloc offset. 9572 * bctr 9573 */ 9574 static const unsigned int pic_plt_resolve[] = 9575 { 9576 ADDIS_11_11, 9577 MFLR_0, 9578 BCL_20_31, 9579 ADDI_11_11, 9580 MFLR_12, 9581 MTLR_0, 9582 SUB_11_11_12, 9583 ADDIS_12_12, 9584 LWZ_0_12, 9585 LWZ_12_12, 9586 MTCTR_0, 9587 ADD_0_11_11, 9588 ADD_11_0_11, 9589 BCTR, 9590 NOP, 9591 NOP 9592 }; 9593 9594 /* 9595 * Non-PIC glink code is a little simpler. 9596 * 9597 * # ith PLT code stub. 9598 * lis 11,(plt+(i-1)*4)@ha 9599 * lwz 11,(plt+(i-1)*4)@l(11) 9600 * mtctr 11 9601 * bctr 9602 * 9603 * The branch table is the same, then comes 9604 * 9605 * PLTresolve: 9606 * lis 12,(got+4)@ha 9607 * addis 11,11,(-res_0)@ha 9608 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve 9609 * addi 11,11,(-res_0)@l # r11 = index * 4 9610 * mtctr 0 9611 * add 0,11,11 9612 * lwz 12,(got+8)@l(12) # got[2] contains the map address 9613 * add 11,0,11 # r11 = index * 12 = reloc offset. 9614 * bctr 9615 */ 9616 static const unsigned int plt_resolve[] = 9617 { 9618 LIS_12, 9619 ADDIS_11_11, 9620 LWZ_0_12, 9621 ADDI_11_11, 9622 MTCTR_0, 9623 ADD_0_11_11, 9624 LWZ_12_12, 9625 ADD_11_0_11, 9626 BCTR, 9627 NOP, 9628 NOP, 9629 NOP, 9630 NOP, 9631 NOP, 9632 NOP, 9633 NOP 9634 }; 9635 9636 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4) 9637 abort (); 9638 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4) 9639 abort (); 9640 9641 /* Build the branch table, one for each plt entry (less one), 9642 and perhaps some padding. */ 9643 p = htab->glink->contents; 9644 p += htab->glink_pltresolve; 9645 endp = htab->glink->contents; 9646 endp += htab->glink->size - GLINK_PLTRESOLVE; 9647 while (p < endp - 8 * 4) 9648 { 9649 bfd_put_32 (output_bfd, B + endp - p, p); 9650 p += 4; 9651 } 9652 while (p < endp) 9653 { 9654 bfd_put_32 (output_bfd, NOP, p); 9655 p += 4; 9656 } 9657 9658 res0 = (htab->glink_pltresolve 9659 + htab->glink->output_section->vma 9660 + htab->glink->output_offset); 9661 9662 /* Last comes the PLTresolve stub. */ 9663 if (info->shared) 9664 { 9665 bfd_vma bcl; 9666 9667 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++) 9668 { 9669 bfd_put_32 (output_bfd, pic_plt_resolve[i], p); 9670 p += 4; 9671 } 9672 p -= 4 * ARRAY_SIZE (pic_plt_resolve); 9673 9674 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4 9675 + htab->glink->output_section->vma 9676 + htab->glink->output_offset); 9677 9678 bfd_put_32 (output_bfd, 9679 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4); 9680 bfd_put_32 (output_bfd, 9681 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4); 9682 bfd_put_32 (output_bfd, 9683 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4); 9684 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl)) 9685 { 9686 bfd_put_32 (output_bfd, 9687 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 9688 bfd_put_32 (output_bfd, 9689 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4); 9690 } 9691 else 9692 { 9693 bfd_put_32 (output_bfd, 9694 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4); 9695 bfd_put_32 (output_bfd, 9696 LWZ_12_12 + 4, p + 9*4); 9697 } 9698 } 9699 else 9700 { 9701 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++) 9702 { 9703 bfd_put_32 (output_bfd, plt_resolve[i], p); 9704 p += 4; 9705 } 9706 p -= 4 * ARRAY_SIZE (plt_resolve); 9707 9708 bfd_put_32 (output_bfd, 9709 LIS_12 + PPC_HA (got + 4), p + 0*4); 9710 bfd_put_32 (output_bfd, 9711 ADDIS_11_11 + PPC_HA (-res0), p + 1*4); 9712 bfd_put_32 (output_bfd, 9713 ADDI_11_11 + PPC_LO (-res0), p + 3*4); 9714 if (PPC_HA (got + 4) == PPC_HA (got + 8)) 9715 { 9716 bfd_put_32 (output_bfd, 9717 LWZ_0_12 + PPC_LO (got + 4), p + 2*4); 9718 bfd_put_32 (output_bfd, 9719 LWZ_12_12 + PPC_LO (got + 8), p + 6*4); 9720 } 9721 else 9722 { 9723 bfd_put_32 (output_bfd, 9724 LWZU_0_12 + PPC_LO (got + 4), p + 2*4); 9725 bfd_put_32 (output_bfd, 9726 LWZ_12_12 + 4, p + 6*4); 9727 } 9728 } 9729 } 9730 9731 if (htab->glink_eh_frame != NULL 9732 && htab->glink_eh_frame->contents != NULL) 9733 { 9734 unsigned char *p = htab->glink_eh_frame->contents; 9735 bfd_vma val; 9736 9737 p += sizeof (glink_eh_frame_cie); 9738 /* FDE length. */ 9739 p += 4; 9740 /* CIE pointer. */ 9741 p += 4; 9742 /* Offset to .glink. */ 9743 val = (htab->glink->output_section->vma 9744 + htab->glink->output_offset); 9745 val -= (htab->glink_eh_frame->output_section->vma 9746 + htab->glink_eh_frame->output_offset); 9747 val -= p - htab->glink_eh_frame->contents; 9748 bfd_put_32 (htab->elf.dynobj, val, p); 9749 9750 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME 9751 && !_bfd_elf_write_section_eh_frame (output_bfd, info, 9752 htab->glink_eh_frame, 9753 htab->glink_eh_frame->contents)) 9754 return FALSE; 9755 } 9756 9757 return ret; 9758 } 9759 9760 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec 9762 #define TARGET_LITTLE_NAME "elf32-powerpcle" 9763 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec 9764 #define TARGET_BIG_NAME "elf32-powerpc" 9765 #define ELF_ARCH bfd_arch_powerpc 9766 #define ELF_TARGET_ID PPC32_ELF_DATA 9767 #define ELF_MACHINE_CODE EM_PPC 9768 #ifdef __QNXTARGET__ 9769 #define ELF_MAXPAGESIZE 0x1000 9770 #else 9771 #define ELF_MAXPAGESIZE 0x10000 9772 #endif 9773 #define ELF_MINPAGESIZE 0x1000 9774 #define ELF_COMMONPAGESIZE 0x1000 9775 #define elf_info_to_howto ppc_elf_info_to_howto 9776 9777 #ifdef EM_CYGNUS_POWERPC 9778 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC 9779 #endif 9780 9781 #ifdef EM_PPC_OLD 9782 #define ELF_MACHINE_ALT2 EM_PPC_OLD 9783 #endif 9784 9785 #define elf_backend_plt_not_loaded 1 9786 #define elf_backend_can_gc_sections 1 9787 #define elf_backend_can_refcount 1 9788 #define elf_backend_rela_normal 1 9789 9790 #define bfd_elf32_mkobject ppc_elf_mkobject 9791 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data 9792 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section 9793 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup 9794 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup 9795 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags 9796 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create 9797 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab 9798 9799 #define elf_backend_object_p ppc_elf_object_p 9800 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook 9801 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook 9802 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr 9803 #define elf_backend_relocate_section ppc_elf_relocate_section 9804 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections 9805 #define elf_backend_check_relocs ppc_elf_check_relocs 9806 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol 9807 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol 9808 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook 9809 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections 9810 #define elf_backend_hash_symbol ppc_elf_hash_symbol 9811 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol 9812 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections 9813 #define elf_backend_fake_sections ppc_elf_fake_sections 9814 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers 9815 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map 9816 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus 9817 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo 9818 #define elf_backend_write_core_note ppc_elf_write_core_note 9819 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class 9820 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing 9821 #define elf_backend_final_write_processing ppc_elf_final_write_processing 9822 #define elf_backend_write_section ppc_elf_write_section 9823 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr 9824 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val 9825 #define elf_backend_action_discarded ppc_elf_action_discarded 9826 #define elf_backend_init_index_section _bfd_elf_init_1_index_section 9827 #define elf_backend_post_process_headers _bfd_elf_set_osabi 9828 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags 9829 #define elf_backend_section_processing ppc_elf_section_processing 9830 9831 #include "elf32-target.h" 9832 9833 /* FreeBSD Target */ 9834 9835 #undef TARGET_LITTLE_SYM 9836 #undef TARGET_LITTLE_NAME 9837 9838 #undef TARGET_BIG_SYM 9839 #define TARGET_BIG_SYM bfd_elf32_powerpc_freebsd_vec 9840 #undef TARGET_BIG_NAME 9841 #define TARGET_BIG_NAME "elf32-powerpc-freebsd" 9842 9843 #undef ELF_OSABI 9844 #define ELF_OSABI ELFOSABI_FREEBSD 9845 9846 #undef elf32_bed 9847 #define elf32_bed elf32_powerpc_fbsd_bed 9848 9849 #include "elf32-target.h" 9850 9851 /* VxWorks Target */ 9852 9853 #undef TARGET_LITTLE_SYM 9854 #undef TARGET_LITTLE_NAME 9855 9856 #undef TARGET_BIG_SYM 9857 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec 9858 #undef TARGET_BIG_NAME 9859 #define TARGET_BIG_NAME "elf32-powerpc-vxworks" 9860 9861 #undef ELF_OSABI 9862 9863 /* VxWorks uses the elf default section flags for .plt. */ 9864 static const struct bfd_elf_special_section * 9865 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) 9866 { 9867 if (sec->name == NULL) 9868 return NULL; 9869 9870 if (strcmp (sec->name, ".plt") == 0) 9871 return _bfd_elf_get_sec_type_attr (abfd, sec); 9872 9873 return ppc_elf_get_sec_type_attr (abfd, sec); 9874 } 9875 9876 /* Like ppc_elf_link_hash_table_create, but overrides 9877 appropriately for VxWorks. */ 9878 static struct bfd_link_hash_table * 9879 ppc_elf_vxworks_link_hash_table_create (bfd *abfd) 9880 { 9881 struct bfd_link_hash_table *ret; 9882 9883 ret = ppc_elf_link_hash_table_create (abfd); 9884 if (ret) 9885 { 9886 struct ppc_elf_link_hash_table *htab 9887 = (struct ppc_elf_link_hash_table *)ret; 9888 htab->is_vxworks = 1; 9889 htab->plt_type = PLT_VXWORKS; 9890 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; 9891 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; 9892 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; 9893 } 9894 return ret; 9895 } 9896 9897 /* Tweak magic VxWorks symbols as they are loaded. */ 9898 static bfd_boolean 9899 ppc_elf_vxworks_add_symbol_hook (bfd *abfd, 9900 struct bfd_link_info *info, 9901 Elf_Internal_Sym *sym, 9902 const char **namep ATTRIBUTE_UNUSED, 9903 flagword *flagsp ATTRIBUTE_UNUSED, 9904 asection **secp, 9905 bfd_vma *valp) 9906 { 9907 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, 9908 valp)) 9909 return FALSE; 9910 9911 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp); 9912 } 9913 9914 static void 9915 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) 9916 { 9917 ppc_elf_final_write_processing(abfd, linker); 9918 elf_vxworks_final_write_processing(abfd, linker); 9919 } 9920 9921 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so 9922 define it. */ 9923 #undef elf_backend_want_plt_sym 9924 #define elf_backend_want_plt_sym 1 9925 #undef elf_backend_want_got_plt 9926 #define elf_backend_want_got_plt 1 9927 #undef elf_backend_got_symbol_offset 9928 #define elf_backend_got_symbol_offset 0 9929 #undef elf_backend_plt_not_loaded 9930 #define elf_backend_plt_not_loaded 0 9931 #undef elf_backend_plt_readonly 9932 #define elf_backend_plt_readonly 1 9933 #undef elf_backend_got_header_size 9934 #define elf_backend_got_header_size 12 9935 9936 #undef bfd_elf32_get_synthetic_symtab 9937 9938 #undef bfd_elf32_bfd_link_hash_table_create 9939 #define bfd_elf32_bfd_link_hash_table_create \ 9940 ppc_elf_vxworks_link_hash_table_create 9941 #undef elf_backend_add_symbol_hook 9942 #define elf_backend_add_symbol_hook \ 9943 ppc_elf_vxworks_add_symbol_hook 9944 #undef elf_backend_link_output_symbol_hook 9945 #define elf_backend_link_output_symbol_hook \ 9946 elf_vxworks_link_output_symbol_hook 9947 #undef elf_backend_final_write_processing 9948 #define elf_backend_final_write_processing \ 9949 ppc_elf_vxworks_final_write_processing 9950 #undef elf_backend_get_sec_type_attr 9951 #define elf_backend_get_sec_type_attr \ 9952 ppc_elf_vxworks_get_sec_type_attr 9953 #undef elf_backend_emit_relocs 9954 #define elf_backend_emit_relocs \ 9955 elf_vxworks_emit_relocs 9956 9957 #undef elf32_bed 9958 #define elf32_bed ppc_elf_vxworks_bed 9959 #undef elf_backend_post_process_headers 9960 9961 #include "elf32-target.h" 9962
Indexes created Mon Mar 30 00:23:01 UTC 2026