1 /* PowerPC64-specific support for 64-bit ELF. 2 Copyright 1999, 2000, 2001, 2002, 2003, 2004 3 Free Software Foundation, Inc. 4 Written by Linus Nordberg, Swox AB <info@swox.com>, 5 based on elf32-ppc.c by Ian Lance Taylor. 6 Largely rewritten by Alan Modra <amodra@bigpond.net.au> 7 8 This file is part of BFD, the Binary File Descriptor library. 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 2 of the License, or 13 (at your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License along 21 with this program; if not, write to the Free Software Foundation, Inc., 22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 23 24 /* The 64-bit PowerPC ELF ABI may be found at 25 http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and 26 http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */ 27 28 #include "bfd.h" 29 #include "sysdep.h" 30 #include "bfdlink.h" 31 #include "libbfd.h" 32 #include "elf-bfd.h" 33 #include "elf/ppc64.h" 34 #include "elf64-ppc.h" 35 36 static bfd_reloc_status_type ppc64_elf_ha_reloc 37 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 38 static bfd_reloc_status_type ppc64_elf_brtaken_reloc 39 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 40 static bfd_reloc_status_type ppc64_elf_sectoff_reloc 41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 42 static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc 43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 44 static bfd_reloc_status_type ppc64_elf_toc_reloc 45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 46 static bfd_reloc_status_type ppc64_elf_toc_ha_reloc 47 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 48 static bfd_reloc_status_type ppc64_elf_toc64_reloc 49 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 50 static bfd_reloc_status_type ppc64_elf_unhandled_reloc 51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 52 53 54 #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec 55 #define TARGET_LITTLE_NAME "elf64-powerpcle" 56 #define TARGET_BIG_SYM bfd_elf64_powerpc_vec 57 #define TARGET_BIG_NAME "elf64-powerpc" 58 #define ELF_ARCH bfd_arch_powerpc 59 #define ELF_MACHINE_CODE EM_PPC64 60 #define ELF_MAXPAGESIZE 0x10000 61 #define elf_info_to_howto ppc64_elf_info_to_howto 62 63 #define elf_backend_want_got_sym 0 64 #define elf_backend_want_plt_sym 0 65 #define elf_backend_plt_alignment 3 66 #define elf_backend_plt_not_loaded 1 67 #define elf_backend_got_symbol_offset 0 68 #define elf_backend_got_header_size 8 69 #define elf_backend_can_gc_sections 1 70 #define elf_backend_can_refcount 1 71 #define elf_backend_rela_normal 1 72 73 #define bfd_elf64_mkobject ppc64_elf_mkobject 74 #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup 75 #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data 76 #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook 77 #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create 78 #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free 79 80 #define elf_backend_object_p ppc64_elf_object_p 81 #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus 82 #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo 83 #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections 84 #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol 85 #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook 86 #define elf_backend_check_relocs ppc64_elf_check_relocs 87 #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook 88 #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook 89 #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol 90 #define elf_backend_hide_symbol ppc64_elf_hide_symbol 91 #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust 92 #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections 93 #define elf_backend_relocate_section ppc64_elf_relocate_section 94 #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol 95 #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class 96 #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections 97 #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook 98 #define elf_backend_special_sections ppc64_elf_special_sections 99 100 /* The name of the dynamic interpreter. This is put in the .interp 101 section. */ 102 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" 103 104 /* The size in bytes of an entry in the procedure linkage table. */ 105 #define PLT_ENTRY_SIZE 24 106 107 /* The initial size of the plt reserved for the dynamic linker. */ 108 #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE 109 110 /* TOC base pointers offset from start of TOC. */ 111 #define TOC_BASE_OFF 0x8000 112 113 /* Offset of tp and dtp pointers from start of TLS block. */ 114 #define TP_OFFSET 0x7000 115 #define DTP_OFFSET 0x8000 116 117 /* .plt call stub instructions. The normal stub is like this, but 118 sometimes the .plt entry crosses a 64k boundary and we need to 119 insert an addis to adjust r12. */ 120 #define PLT_CALL_STUB_SIZE (7*4) 121 #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ 122 #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */ 123 #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */ 124 #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */ 125 #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */ 126 /* ld %r11,xxx+16@l(%r12) */ 127 #define BCTR 0x4e800420 /* bctr */ 128 129 130 #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */ 131 #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */ 132 133 #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */ 134 135 /* glink call stub instructions. We enter with the index in R0, and the 136 address of glink entry in CTR. From that, we can calculate PLT0. */ 137 #define GLINK_CALL_STUB_SIZE (16*4) 138 #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */ 139 #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */ 140 #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */ 141 #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */ 142 #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */ 143 #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */ 144 #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */ 145 /* sub %r12,%r12,%r11 */ 146 #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */ 147 #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */ 148 /* ld %r11,xxx@l(%r12) */ 149 #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */ 150 /* ld %r2,8(%r12) */ 151 /* mtctr %r11 */ 152 /* ld %r11,16(%r12) */ 153 /* bctr */ 154 155 /* Pad with this. */ 156 #define NOP 0x60000000 157 158 /* Some other nops. */ 159 #define CROR_151515 0x4def7b82 160 #define CROR_313131 0x4ffffb82 161 162 /* .glink entries for the first 32k functions are two instructions. */ 163 #define LI_R0_0 0x38000000 /* li %r0,0 */ 164 #define B_DOT 0x48000000 /* b . */ 165 166 /* After that, we need two instructions to load the index, followed by 167 a branch. */ 168 #define LIS_R0_0 0x3c000000 /* lis %r0,0 */ 169 #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ 170 171 /* Instructions to save and restore floating point regs. */ 172 #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ 173 #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ 174 #define BLR 0x4e800020 /* blr */ 175 176 /* Since .opd is an array of descriptors and each entry will end up 177 with identical R_PPC64_RELATIVE relocs, there is really no need to 178 propagate .opd relocs; The dynamic linker should be taught to 179 relocate .opd without reloc entries. */ 180 #ifndef NO_OPD_RELOCS 181 #define NO_OPD_RELOCS 0 182 #endif 183 184 #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1) 185 186 /* Relocation HOWTO's. */ 187 static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max]; 188 189 static reloc_howto_type ppc64_elf_howto_raw[] = { 190 /* This reloc does nothing. */ 191 HOWTO (R_PPC64_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_dont, /* complain_on_overflow */ 198 bfd_elf_generic_reloc, /* special_function */ 199 "R_PPC64_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_PPC64_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_PPC64_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_PPC64_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_PPC64_ADDR24", /* name */ 231 FALSE, /* partial_inplace */ 232 0, /* src_mask */ 233 0x03fffffc, /* dst_mask */ 234 FALSE), /* pcrel_offset */ 235 236 /* A standard 16 bit relocation. */ 237 HOWTO (R_PPC64_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_PPC64_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_PPC64_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_PPC64_ADDR16_LO", /* name */ 261 FALSE, /* partial_inplace */ 262 0, /* src_mask */ 263 0xffff, /* dst_mask */ 264 FALSE), /* pcrel_offset */ 265 266 /* Bits 16-31 of an address. */ 267 HOWTO (R_PPC64_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_PPC64_ADDR16_HI", /* name */ 276 FALSE, /* partial_inplace */ 277 0, /* src_mask */ 278 0xffff, /* dst_mask */ 279 FALSE), /* pcrel_offset */ 280 281 /* Bits 16-31 of an address, plus 1 if the contents of the low 16 282 bits, treated as a signed number, is negative. */ 283 HOWTO (R_PPC64_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 ppc64_elf_ha_reloc, /* special_function */ 291 "R_PPC64_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_PPC64_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_PPC64_ADDR14", /* name */ 308 FALSE, /* partial_inplace */ 309 0, /* src_mask */ 310 0x0000fffc, /* 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_PPC64_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 ppc64_elf_brtaken_reloc, /* special_function */ 324 "R_PPC64_ADDR14_BRTAKEN",/* name */ 325 FALSE, /* partial_inplace */ 326 0, /* src_mask */ 327 0x0000fffc, /* 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_PPC64_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 ppc64_elf_brtaken_reloc, /* special_function */ 341 "R_PPC64_ADDR14_BRNTAKEN",/* name */ 342 FALSE, /* partial_inplace */ 343 0, /* src_mask */ 344 0x0000fffc, /* dst_mask */ 345 FALSE), /* pcrel_offset */ 346 347 /* A relative 26 bit branch; the lower two bits must be zero. */ 348 HOWTO (R_PPC64_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_PPC64_REL24", /* name */ 357 FALSE, /* partial_inplace */ 358 0, /* src_mask */ 359 0x03fffffc, /* dst_mask */ 360 TRUE), /* pcrel_offset */ 361 362 /* A relative 16 bit branch; the lower two bits must be zero. */ 363 HOWTO (R_PPC64_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_PPC64_REL14", /* name */ 372 FALSE, /* partial_inplace */ 373 0, /* src_mask */ 374 0x0000fffc, /* 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_PPC64_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 ppc64_elf_brtaken_reloc, /* special_function */ 388 "R_PPC64_REL14_BRTAKEN", /* name */ 389 FALSE, /* partial_inplace */ 390 0, /* src_mask */ 391 0x0000fffc, /* 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_PPC64_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 ppc64_elf_brtaken_reloc, /* special_function */ 405 "R_PPC64_REL14_BRNTAKEN",/* name */ 406 FALSE, /* partial_inplace */ 407 0, /* src_mask */ 408 0x0000fffc, /* dst_mask */ 409 TRUE), /* pcrel_offset */ 410 411 /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the 412 symbol. */ 413 HOWTO (R_PPC64_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 ppc64_elf_unhandled_reloc, /* special_function */ 421 "R_PPC64_GOT16", /* name */ 422 FALSE, /* partial_inplace */ 423 0, /* src_mask */ 424 0xffff, /* dst_mask */ 425 FALSE), /* pcrel_offset */ 426 427 /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for 428 the symbol. */ 429 HOWTO (R_PPC64_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 ppc64_elf_unhandled_reloc, /* special_function */ 437 "R_PPC64_GOT16_LO", /* name */ 438 FALSE, /* partial_inplace */ 439 0, /* src_mask */ 440 0xffff, /* dst_mask */ 441 FALSE), /* pcrel_offset */ 442 443 /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for 444 the symbol. */ 445 HOWTO (R_PPC64_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_dont,/* complain_on_overflow */ 452 ppc64_elf_unhandled_reloc, /* special_function */ 453 "R_PPC64_GOT16_HI", /* name */ 454 FALSE, /* partial_inplace */ 455 0, /* src_mask */ 456 0xffff, /* dst_mask */ 457 FALSE), /* pcrel_offset */ 458 459 /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for 460 the symbol. */ 461 HOWTO (R_PPC64_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_dont,/* complain_on_overflow */ 468 ppc64_elf_unhandled_reloc, /* special_function */ 469 "R_PPC64_GOT16_HA", /* name */ 470 FALSE, /* partial_inplace */ 471 0, /* src_mask */ 472 0xffff, /* dst_mask */ 473 FALSE), /* pcrel_offset */ 474 475 /* This is used only by the dynamic linker. The symbol should exist 476 both in the object being run and in some shared library. The 477 dynamic linker copies the data addressed by the symbol from the 478 shared library into the object, because the object being 479 run has to have the data at some particular address. */ 480 HOWTO (R_PPC64_COPY, /* type */ 481 0, /* rightshift */ 482 0, /* this one is variable size */ 483 0, /* bitsize */ 484 FALSE, /* pc_relative */ 485 0, /* bitpos */ 486 complain_overflow_dont, /* complain_on_overflow */ 487 ppc64_elf_unhandled_reloc, /* special_function */ 488 "R_PPC64_COPY", /* name */ 489 FALSE, /* partial_inplace */ 490 0, /* src_mask */ 491 0, /* dst_mask */ 492 FALSE), /* pcrel_offset */ 493 494 /* Like R_PPC64_ADDR64, but used when setting global offset table 495 entries. */ 496 HOWTO (R_PPC64_GLOB_DAT, /* type */ 497 0, /* rightshift */ 498 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 499 64, /* bitsize */ 500 FALSE, /* pc_relative */ 501 0, /* bitpos */ 502 complain_overflow_dont, /* complain_on_overflow */ 503 ppc64_elf_unhandled_reloc, /* special_function */ 504 "R_PPC64_GLOB_DAT", /* name */ 505 FALSE, /* partial_inplace */ 506 0, /* src_mask */ 507 ONES (64), /* dst_mask */ 508 FALSE), /* pcrel_offset */ 509 510 /* Created by the link editor. Marks a procedure linkage table 511 entry for a symbol. */ 512 HOWTO (R_PPC64_JMP_SLOT, /* type */ 513 0, /* rightshift */ 514 0, /* size (0 = byte, 1 = short, 2 = long) */ 515 0, /* bitsize */ 516 FALSE, /* pc_relative */ 517 0, /* bitpos */ 518 complain_overflow_dont, /* complain_on_overflow */ 519 ppc64_elf_unhandled_reloc, /* special_function */ 520 "R_PPC64_JMP_SLOT", /* name */ 521 FALSE, /* partial_inplace */ 522 0, /* src_mask */ 523 0, /* dst_mask */ 524 FALSE), /* pcrel_offset */ 525 526 /* Used only by the dynamic linker. When the object is run, this 527 doubleword64 is set to the load address of the object, plus the 528 addend. */ 529 HOWTO (R_PPC64_RELATIVE, /* type */ 530 0, /* rightshift */ 531 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 532 64, /* bitsize */ 533 FALSE, /* pc_relative */ 534 0, /* bitpos */ 535 complain_overflow_dont, /* complain_on_overflow */ 536 bfd_elf_generic_reloc, /* special_function */ 537 "R_PPC64_RELATIVE", /* name */ 538 FALSE, /* partial_inplace */ 539 0, /* src_mask */ 540 ONES (64), /* dst_mask */ 541 FALSE), /* pcrel_offset */ 542 543 /* Like R_PPC64_ADDR32, but may be unaligned. */ 544 HOWTO (R_PPC64_UADDR32, /* 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_PPC64_UADDR32", /* name */ 553 FALSE, /* partial_inplace */ 554 0, /* src_mask */ 555 0xffffffff, /* dst_mask */ 556 FALSE), /* pcrel_offset */ 557 558 /* Like R_PPC64_ADDR16, but may be unaligned. */ 559 HOWTO (R_PPC64_UADDR16, /* type */ 560 0, /* rightshift */ 561 1, /* size (0 = byte, 1 = short, 2 = long) */ 562 16, /* bitsize */ 563 FALSE, /* pc_relative */ 564 0, /* bitpos */ 565 complain_overflow_bitfield, /* complain_on_overflow */ 566 bfd_elf_generic_reloc, /* special_function */ 567 "R_PPC64_UADDR16", /* name */ 568 FALSE, /* partial_inplace */ 569 0, /* src_mask */ 570 0xffff, /* dst_mask */ 571 FALSE), /* pcrel_offset */ 572 573 /* 32-bit PC relative. */ 574 HOWTO (R_PPC64_REL32, /* type */ 575 0, /* rightshift */ 576 2, /* size (0 = byte, 1 = short, 2 = long) */ 577 32, /* bitsize */ 578 TRUE, /* pc_relative */ 579 0, /* bitpos */ 580 /* FIXME: Verify. Was complain_overflow_bitfield. */ 581 complain_overflow_signed, /* complain_on_overflow */ 582 bfd_elf_generic_reloc, /* special_function */ 583 "R_PPC64_REL32", /* name */ 584 FALSE, /* partial_inplace */ 585 0, /* src_mask */ 586 0xffffffff, /* dst_mask */ 587 TRUE), /* pcrel_offset */ 588 589 /* 32-bit relocation to the symbol's procedure linkage table. */ 590 HOWTO (R_PPC64_PLT32, /* type */ 591 0, /* rightshift */ 592 2, /* size (0 = byte, 1 = short, 2 = long) */ 593 32, /* bitsize */ 594 FALSE, /* pc_relative */ 595 0, /* bitpos */ 596 complain_overflow_bitfield, /* complain_on_overflow */ 597 ppc64_elf_unhandled_reloc, /* special_function */ 598 "R_PPC64_PLT32", /* name */ 599 FALSE, /* partial_inplace */ 600 0, /* src_mask */ 601 0xffffffff, /* dst_mask */ 602 FALSE), /* pcrel_offset */ 603 604 /* 32-bit PC relative relocation to the symbol's procedure linkage table. 605 FIXME: R_PPC64_PLTREL32 not supported. */ 606 HOWTO (R_PPC64_PLTREL32, /* 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_signed, /* complain_on_overflow */ 613 bfd_elf_generic_reloc, /* special_function */ 614 "R_PPC64_PLTREL32", /* name */ 615 FALSE, /* partial_inplace */ 616 0, /* src_mask */ 617 0xffffffff, /* dst_mask */ 618 TRUE), /* pcrel_offset */ 619 620 /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for 621 the symbol. */ 622 HOWTO (R_PPC64_PLT16_LO, /* type */ 623 0, /* rightshift */ 624 1, /* size (0 = byte, 1 = short, 2 = long) */ 625 16, /* bitsize */ 626 FALSE, /* pc_relative */ 627 0, /* bitpos */ 628 complain_overflow_dont, /* complain_on_overflow */ 629 ppc64_elf_unhandled_reloc, /* special_function */ 630 "R_PPC64_PLT16_LO", /* name */ 631 FALSE, /* partial_inplace */ 632 0, /* src_mask */ 633 0xffff, /* dst_mask */ 634 FALSE), /* pcrel_offset */ 635 636 /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for 637 the symbol. */ 638 HOWTO (R_PPC64_PLT16_HI, /* type */ 639 16, /* rightshift */ 640 1, /* size (0 = byte, 1 = short, 2 = long) */ 641 16, /* bitsize */ 642 FALSE, /* pc_relative */ 643 0, /* bitpos */ 644 complain_overflow_dont, /* complain_on_overflow */ 645 ppc64_elf_unhandled_reloc, /* special_function */ 646 "R_PPC64_PLT16_HI", /* name */ 647 FALSE, /* partial_inplace */ 648 0, /* src_mask */ 649 0xffff, /* dst_mask */ 650 FALSE), /* pcrel_offset */ 651 652 /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for 653 the symbol. */ 654 HOWTO (R_PPC64_PLT16_HA, /* type */ 655 16, /* 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 ppc64_elf_unhandled_reloc, /* special_function */ 662 "R_PPC64_PLT16_HA", /* name */ 663 FALSE, /* partial_inplace */ 664 0, /* src_mask */ 665 0xffff, /* dst_mask */ 666 FALSE), /* pcrel_offset */ 667 668 /* 16-bit section relative relocation. */ 669 HOWTO (R_PPC64_SECTOFF, /* type */ 670 0, /* rightshift */ 671 1, /* size (0 = byte, 1 = short, 2 = long) */ 672 16, /* bitsize */ 673 FALSE, /* pc_relative */ 674 0, /* bitpos */ 675 complain_overflow_bitfield, /* complain_on_overflow */ 676 ppc64_elf_sectoff_reloc, /* special_function */ 677 "R_PPC64_SECTOFF", /* name */ 678 FALSE, /* partial_inplace */ 679 0, /* src_mask */ 680 0xffff, /* dst_mask */ 681 FALSE), /* pcrel_offset */ 682 683 /* Like R_PPC64_SECTOFF, but no overflow warning. */ 684 HOWTO (R_PPC64_SECTOFF_LO, /* type */ 685 0, /* rightshift */ 686 1, /* size (0 = byte, 1 = short, 2 = long) */ 687 16, /* bitsize */ 688 FALSE, /* pc_relative */ 689 0, /* bitpos */ 690 complain_overflow_dont, /* complain_on_overflow */ 691 ppc64_elf_sectoff_reloc, /* special_function */ 692 "R_PPC64_SECTOFF_LO", /* name */ 693 FALSE, /* partial_inplace */ 694 0, /* src_mask */ 695 0xffff, /* dst_mask */ 696 FALSE), /* pcrel_offset */ 697 698 /* 16-bit upper half section relative relocation. */ 699 HOWTO (R_PPC64_SECTOFF_HI, /* type */ 700 16, /* rightshift */ 701 1, /* size (0 = byte, 1 = short, 2 = long) */ 702 16, /* bitsize */ 703 FALSE, /* pc_relative */ 704 0, /* bitpos */ 705 complain_overflow_dont, /* complain_on_overflow */ 706 ppc64_elf_sectoff_reloc, /* special_function */ 707 "R_PPC64_SECTOFF_HI", /* name */ 708 FALSE, /* partial_inplace */ 709 0, /* src_mask */ 710 0xffff, /* dst_mask */ 711 FALSE), /* pcrel_offset */ 712 713 /* 16-bit upper half adjusted section relative relocation. */ 714 HOWTO (R_PPC64_SECTOFF_HA, /* type */ 715 16, /* rightshift */ 716 1, /* size (0 = byte, 1 = short, 2 = long) */ 717 16, /* bitsize */ 718 FALSE, /* pc_relative */ 719 0, /* bitpos */ 720 complain_overflow_dont, /* complain_on_overflow */ 721 ppc64_elf_sectoff_ha_reloc, /* special_function */ 722 "R_PPC64_SECTOFF_HA", /* name */ 723 FALSE, /* partial_inplace */ 724 0, /* src_mask */ 725 0xffff, /* dst_mask */ 726 FALSE), /* pcrel_offset */ 727 728 /* Like R_PPC64_REL24 without touching the two least significant bits. */ 729 HOWTO (R_PPC64_REL30, /* type */ 730 2, /* rightshift */ 731 2, /* size (0 = byte, 1 = short, 2 = long) */ 732 30, /* bitsize */ 733 TRUE, /* pc_relative */ 734 0, /* bitpos */ 735 complain_overflow_dont, /* complain_on_overflow */ 736 bfd_elf_generic_reloc, /* special_function */ 737 "R_PPC64_REL30", /* name */ 738 FALSE, /* partial_inplace */ 739 0, /* src_mask */ 740 0xfffffffc, /* dst_mask */ 741 TRUE), /* pcrel_offset */ 742 743 /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ 744 745 /* A standard 64-bit relocation. */ 746 HOWTO (R_PPC64_ADDR64, /* type */ 747 0, /* rightshift */ 748 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 749 64, /* bitsize */ 750 FALSE, /* pc_relative */ 751 0, /* bitpos */ 752 complain_overflow_dont, /* complain_on_overflow */ 753 bfd_elf_generic_reloc, /* special_function */ 754 "R_PPC64_ADDR64", /* name */ 755 FALSE, /* partial_inplace */ 756 0, /* src_mask */ 757 ONES (64), /* dst_mask */ 758 FALSE), /* pcrel_offset */ 759 760 /* The bits 32-47 of an address. */ 761 HOWTO (R_PPC64_ADDR16_HIGHER, /* type */ 762 32, /* rightshift */ 763 1, /* size (0 = byte, 1 = short, 2 = long) */ 764 16, /* bitsize */ 765 FALSE, /* pc_relative */ 766 0, /* bitpos */ 767 complain_overflow_dont, /* complain_on_overflow */ 768 bfd_elf_generic_reloc, /* special_function */ 769 "R_PPC64_ADDR16_HIGHER", /* name */ 770 FALSE, /* partial_inplace */ 771 0, /* src_mask */ 772 0xffff, /* dst_mask */ 773 FALSE), /* pcrel_offset */ 774 775 /* The bits 32-47 of an address, plus 1 if the contents of the low 776 16 bits, treated as a signed number, is negative. */ 777 HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */ 778 32, /* rightshift */ 779 1, /* size (0 = byte, 1 = short, 2 = long) */ 780 16, /* bitsize */ 781 FALSE, /* pc_relative */ 782 0, /* bitpos */ 783 complain_overflow_dont, /* complain_on_overflow */ 784 ppc64_elf_ha_reloc, /* special_function */ 785 "R_PPC64_ADDR16_HIGHERA", /* name */ 786 FALSE, /* partial_inplace */ 787 0, /* src_mask */ 788 0xffff, /* dst_mask */ 789 FALSE), /* pcrel_offset */ 790 791 /* The bits 48-63 of an address. */ 792 HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */ 793 48, /* rightshift */ 794 1, /* size (0 = byte, 1 = short, 2 = long) */ 795 16, /* bitsize */ 796 FALSE, /* pc_relative */ 797 0, /* bitpos */ 798 complain_overflow_dont, /* complain_on_overflow */ 799 bfd_elf_generic_reloc, /* special_function */ 800 "R_PPC64_ADDR16_HIGHEST", /* name */ 801 FALSE, /* partial_inplace */ 802 0, /* src_mask */ 803 0xffff, /* dst_mask */ 804 FALSE), /* pcrel_offset */ 805 806 /* The bits 48-63 of an address, plus 1 if the contents of the low 807 16 bits, treated as a signed number, is negative. */ 808 HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */ 809 48, /* rightshift */ 810 1, /* size (0 = byte, 1 = short, 2 = long) */ 811 16, /* bitsize */ 812 FALSE, /* pc_relative */ 813 0, /* bitpos */ 814 complain_overflow_dont, /* complain_on_overflow */ 815 ppc64_elf_ha_reloc, /* special_function */ 816 "R_PPC64_ADDR16_HIGHESTA", /* name */ 817 FALSE, /* partial_inplace */ 818 0, /* src_mask */ 819 0xffff, /* dst_mask */ 820 FALSE), /* pcrel_offset */ 821 822 /* Like ADDR64, but may be unaligned. */ 823 HOWTO (R_PPC64_UADDR64, /* type */ 824 0, /* rightshift */ 825 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 826 64, /* bitsize */ 827 FALSE, /* pc_relative */ 828 0, /* bitpos */ 829 complain_overflow_dont, /* complain_on_overflow */ 830 bfd_elf_generic_reloc, /* special_function */ 831 "R_PPC64_UADDR64", /* name */ 832 FALSE, /* partial_inplace */ 833 0, /* src_mask */ 834 ONES (64), /* dst_mask */ 835 FALSE), /* pcrel_offset */ 836 837 /* 64-bit relative relocation. */ 838 HOWTO (R_PPC64_REL64, /* type */ 839 0, /* rightshift */ 840 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 841 64, /* bitsize */ 842 TRUE, /* pc_relative */ 843 0, /* bitpos */ 844 complain_overflow_dont, /* complain_on_overflow */ 845 bfd_elf_generic_reloc, /* special_function */ 846 "R_PPC64_REL64", /* name */ 847 FALSE, /* partial_inplace */ 848 0, /* src_mask */ 849 ONES (64), /* dst_mask */ 850 TRUE), /* pcrel_offset */ 851 852 /* 64-bit relocation to the symbol's procedure linkage table. */ 853 HOWTO (R_PPC64_PLT64, /* type */ 854 0, /* rightshift */ 855 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 856 64, /* bitsize */ 857 FALSE, /* pc_relative */ 858 0, /* bitpos */ 859 complain_overflow_dont, /* complain_on_overflow */ 860 ppc64_elf_unhandled_reloc, /* special_function */ 861 "R_PPC64_PLT64", /* name */ 862 FALSE, /* partial_inplace */ 863 0, /* src_mask */ 864 ONES (64), /* dst_mask */ 865 FALSE), /* pcrel_offset */ 866 867 /* 64-bit PC relative relocation to the symbol's procedure linkage 868 table. */ 869 /* FIXME: R_PPC64_PLTREL64 not supported. */ 870 HOWTO (R_PPC64_PLTREL64, /* type */ 871 0, /* rightshift */ 872 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 873 64, /* bitsize */ 874 TRUE, /* pc_relative */ 875 0, /* bitpos */ 876 complain_overflow_dont, /* complain_on_overflow */ 877 ppc64_elf_unhandled_reloc, /* special_function */ 878 "R_PPC64_PLTREL64", /* name */ 879 FALSE, /* partial_inplace */ 880 0, /* src_mask */ 881 ONES (64), /* dst_mask */ 882 TRUE), /* pcrel_offset */ 883 884 /* 16 bit TOC-relative relocation. */ 885 886 /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ 887 HOWTO (R_PPC64_TOC16, /* type */ 888 0, /* rightshift */ 889 1, /* size (0 = byte, 1 = short, 2 = long) */ 890 16, /* bitsize */ 891 FALSE, /* pc_relative */ 892 0, /* bitpos */ 893 complain_overflow_signed, /* complain_on_overflow */ 894 ppc64_elf_toc_reloc, /* special_function */ 895 "R_PPC64_TOC16", /* name */ 896 FALSE, /* partial_inplace */ 897 0, /* src_mask */ 898 0xffff, /* dst_mask */ 899 FALSE), /* pcrel_offset */ 900 901 /* 16 bit TOC-relative relocation without overflow. */ 902 903 /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ 904 HOWTO (R_PPC64_TOC16_LO, /* type */ 905 0, /* rightshift */ 906 1, /* size (0 = byte, 1 = short, 2 = long) */ 907 16, /* bitsize */ 908 FALSE, /* pc_relative */ 909 0, /* bitpos */ 910 complain_overflow_dont, /* complain_on_overflow */ 911 ppc64_elf_toc_reloc, /* special_function */ 912 "R_PPC64_TOC16_LO", /* name */ 913 FALSE, /* partial_inplace */ 914 0, /* src_mask */ 915 0xffff, /* dst_mask */ 916 FALSE), /* pcrel_offset */ 917 918 /* 16 bit TOC-relative relocation, high 16 bits. */ 919 920 /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ 921 HOWTO (R_PPC64_TOC16_HI, /* type */ 922 16, /* rightshift */ 923 1, /* size (0 = byte, 1 = short, 2 = long) */ 924 16, /* bitsize */ 925 FALSE, /* pc_relative */ 926 0, /* bitpos */ 927 complain_overflow_dont, /* complain_on_overflow */ 928 ppc64_elf_toc_reloc, /* special_function */ 929 "R_PPC64_TOC16_HI", /* name */ 930 FALSE, /* partial_inplace */ 931 0, /* src_mask */ 932 0xffff, /* dst_mask */ 933 FALSE), /* pcrel_offset */ 934 935 /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the 936 contents of the low 16 bits, treated as a signed number, is 937 negative. */ 938 939 /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ 940 HOWTO (R_PPC64_TOC16_HA, /* type */ 941 16, /* rightshift */ 942 1, /* size (0 = byte, 1 = short, 2 = long) */ 943 16, /* bitsize */ 944 FALSE, /* pc_relative */ 945 0, /* bitpos */ 946 complain_overflow_dont, /* complain_on_overflow */ 947 ppc64_elf_toc_ha_reloc, /* special_function */ 948 "R_PPC64_TOC16_HA", /* name */ 949 FALSE, /* partial_inplace */ 950 0, /* src_mask */ 951 0xffff, /* dst_mask */ 952 FALSE), /* pcrel_offset */ 953 954 /* 64-bit relocation; insert value of TOC base (.TOC.). */ 955 956 /* R_PPC64_TOC 51 doubleword64 .TOC. */ 957 HOWTO (R_PPC64_TOC, /* type */ 958 0, /* rightshift */ 959 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ 960 64, /* bitsize */ 961 FALSE, /* pc_relative */ 962 0, /* bitpos */ 963 complain_overflow_bitfield, /* complain_on_overflow */ 964 ppc64_elf_toc64_reloc, /* special_function */ 965 "R_PPC64_TOC", /* name */ 966 FALSE, /* partial_inplace */ 967 0, /* src_mask */ 968 ONES (64), /* dst_mask */ 969 FALSE), /* pcrel_offset */ 970 971 /* Like R_PPC64_GOT16, but also informs the link editor that the 972 value to relocate may (!) refer to a PLT entry which the link 973 editor (a) may replace with the symbol value. If the link editor 974 is unable to fully resolve the symbol, it may (b) create a PLT 975 entry and store the address to the new PLT entry in the GOT. 976 This permits lazy resolution of function symbols at run time. 977 The link editor may also skip all of this and just (c) emit a 978 R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ 979 /* FIXME: R_PPC64_PLTGOT16 not implemented. */ 980 HOWTO (R_PPC64_PLTGOT16, /* type */ 981 0, /* rightshift */ 982 1, /* size (0 = byte, 1 = short, 2 = long) */ 983 16, /* bitsize */ 984 FALSE, /* pc_relative */ 985 0, /* bitpos */ 986 complain_overflow_signed, /* complain_on_overflow */ 987 ppc64_elf_unhandled_reloc, /* special_function */ 988 "R_PPC64_PLTGOT16", /* name */ 989 FALSE, /* partial_inplace */ 990 0, /* src_mask */ 991 0xffff, /* dst_mask */ 992 FALSE), /* pcrel_offset */ 993 994 /* Like R_PPC64_PLTGOT16, but without overflow. */ 995 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ 996 HOWTO (R_PPC64_PLTGOT16_LO, /* type */ 997 0, /* rightshift */ 998 1, /* size (0 = byte, 1 = short, 2 = long) */ 999 16, /* bitsize */ 1000 FALSE, /* pc_relative */ 1001 0, /* bitpos */ 1002 complain_overflow_dont, /* complain_on_overflow */ 1003 ppc64_elf_unhandled_reloc, /* special_function */ 1004 "R_PPC64_PLTGOT16_LO", /* name */ 1005 FALSE, /* partial_inplace */ 1006 0, /* src_mask */ 1007 0xffff, /* dst_mask */ 1008 FALSE), /* pcrel_offset */ 1009 1010 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ 1011 /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ 1012 HOWTO (R_PPC64_PLTGOT16_HI, /* type */ 1013 16, /* rightshift */ 1014 1, /* size (0 = byte, 1 = short, 2 = long) */ 1015 16, /* bitsize */ 1016 FALSE, /* pc_relative */ 1017 0, /* bitpos */ 1018 complain_overflow_dont, /* complain_on_overflow */ 1019 ppc64_elf_unhandled_reloc, /* special_function */ 1020 "R_PPC64_PLTGOT16_HI", /* name */ 1021 FALSE, /* partial_inplace */ 1022 0, /* src_mask */ 1023 0xffff, /* dst_mask */ 1024 FALSE), /* pcrel_offset */ 1025 1026 /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus 1027 1 if the contents of the low 16 bits, treated as a signed number, 1028 is negative. */ 1029 /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ 1030 HOWTO (R_PPC64_PLTGOT16_HA, /* type */ 1031 16, /* rightshift */ 1032 1, /* size (0 = byte, 1 = short, 2 = long) */ 1033 16, /* bitsize */ 1034 FALSE, /* pc_relative */ 1035 0, /* bitpos */ 1036 complain_overflow_dont,/* complain_on_overflow */ 1037 ppc64_elf_unhandled_reloc, /* special_function */ 1038 "R_PPC64_PLTGOT16_HA", /* name */ 1039 FALSE, /* partial_inplace */ 1040 0, /* src_mask */ 1041 0xffff, /* dst_mask */ 1042 FALSE), /* pcrel_offset */ 1043 1044 /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ 1045 HOWTO (R_PPC64_ADDR16_DS, /* type */ 1046 0, /* rightshift */ 1047 1, /* size (0 = byte, 1 = short, 2 = long) */ 1048 16, /* bitsize */ 1049 FALSE, /* pc_relative */ 1050 0, /* bitpos */ 1051 complain_overflow_bitfield, /* complain_on_overflow */ 1052 bfd_elf_generic_reloc, /* special_function */ 1053 "R_PPC64_ADDR16_DS", /* name */ 1054 FALSE, /* partial_inplace */ 1055 0, /* src_mask */ 1056 0xfffc, /* dst_mask */ 1057 FALSE), /* pcrel_offset */ 1058 1059 /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ 1060 HOWTO (R_PPC64_ADDR16_LO_DS, /* type */ 1061 0, /* rightshift */ 1062 1, /* size (0 = byte, 1 = short, 2 = long) */ 1063 16, /* bitsize */ 1064 FALSE, /* pc_relative */ 1065 0, /* bitpos */ 1066 complain_overflow_dont,/* complain_on_overflow */ 1067 bfd_elf_generic_reloc, /* special_function */ 1068 "R_PPC64_ADDR16_LO_DS",/* name */ 1069 FALSE, /* partial_inplace */ 1070 0, /* src_mask */ 1071 0xfffc, /* dst_mask */ 1072 FALSE), /* pcrel_offset */ 1073 1074 /* Like R_PPC64_GOT16, but for instructions with a DS field. */ 1075 HOWTO (R_PPC64_GOT16_DS, /* type */ 1076 0, /* rightshift */ 1077 1, /* size (0 = byte, 1 = short, 2 = long) */ 1078 16, /* bitsize */ 1079 FALSE, /* pc_relative */ 1080 0, /* bitpos */ 1081 complain_overflow_signed, /* complain_on_overflow */ 1082 ppc64_elf_unhandled_reloc, /* special_function */ 1083 "R_PPC64_GOT16_DS", /* name */ 1084 FALSE, /* partial_inplace */ 1085 0, /* src_mask */ 1086 0xfffc, /* dst_mask */ 1087 FALSE), /* pcrel_offset */ 1088 1089 /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ 1090 HOWTO (R_PPC64_GOT16_LO_DS, /* type */ 1091 0, /* rightshift */ 1092 1, /* size (0 = byte, 1 = short, 2 = long) */ 1093 16, /* bitsize */ 1094 FALSE, /* pc_relative */ 1095 0, /* bitpos */ 1096 complain_overflow_dont, /* complain_on_overflow */ 1097 ppc64_elf_unhandled_reloc, /* special_function */ 1098 "R_PPC64_GOT16_LO_DS", /* name */ 1099 FALSE, /* partial_inplace */ 1100 0, /* src_mask */ 1101 0xfffc, /* dst_mask */ 1102 FALSE), /* pcrel_offset */ 1103 1104 /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ 1105 HOWTO (R_PPC64_PLT16_LO_DS, /* type */ 1106 0, /* rightshift */ 1107 1, /* size (0 = byte, 1 = short, 2 = long) */ 1108 16, /* bitsize */ 1109 FALSE, /* pc_relative */ 1110 0, /* bitpos */ 1111 complain_overflow_dont, /* complain_on_overflow */ 1112 ppc64_elf_unhandled_reloc, /* special_function */ 1113 "R_PPC64_PLT16_LO_DS", /* name */ 1114 FALSE, /* partial_inplace */ 1115 0, /* src_mask */ 1116 0xfffc, /* dst_mask */ 1117 FALSE), /* pcrel_offset */ 1118 1119 /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ 1120 HOWTO (R_PPC64_SECTOFF_DS, /* type */ 1121 0, /* rightshift */ 1122 1, /* size (0 = byte, 1 = short, 2 = long) */ 1123 16, /* bitsize */ 1124 FALSE, /* pc_relative */ 1125 0, /* bitpos */ 1126 complain_overflow_bitfield, /* complain_on_overflow */ 1127 ppc64_elf_sectoff_reloc, /* special_function */ 1128 "R_PPC64_SECTOFF_DS", /* name */ 1129 FALSE, /* partial_inplace */ 1130 0, /* src_mask */ 1131 0xfffc, /* dst_mask */ 1132 FALSE), /* pcrel_offset */ 1133 1134 /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ 1135 HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */ 1136 0, /* rightshift */ 1137 1, /* size (0 = byte, 1 = short, 2 = long) */ 1138 16, /* bitsize */ 1139 FALSE, /* pc_relative */ 1140 0, /* bitpos */ 1141 complain_overflow_dont, /* complain_on_overflow */ 1142 ppc64_elf_sectoff_reloc, /* special_function */ 1143 "R_PPC64_SECTOFF_LO_DS",/* name */ 1144 FALSE, /* partial_inplace */ 1145 0, /* src_mask */ 1146 0xfffc, /* dst_mask */ 1147 FALSE), /* pcrel_offset */ 1148 1149 /* Like R_PPC64_TOC16, but for instructions with a DS field. */ 1150 HOWTO (R_PPC64_TOC16_DS, /* type */ 1151 0, /* rightshift */ 1152 1, /* size (0 = byte, 1 = short, 2 = long) */ 1153 16, /* bitsize */ 1154 FALSE, /* pc_relative */ 1155 0, /* bitpos */ 1156 complain_overflow_signed, /* complain_on_overflow */ 1157 ppc64_elf_toc_reloc, /* special_function */ 1158 "R_PPC64_TOC16_DS", /* name */ 1159 FALSE, /* partial_inplace */ 1160 0, /* src_mask */ 1161 0xfffc, /* dst_mask */ 1162 FALSE), /* pcrel_offset */ 1163 1164 /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ 1165 HOWTO (R_PPC64_TOC16_LO_DS, /* type */ 1166 0, /* rightshift */ 1167 1, /* size (0 = byte, 1 = short, 2 = long) */ 1168 16, /* bitsize */ 1169 FALSE, /* pc_relative */ 1170 0, /* bitpos */ 1171 complain_overflow_dont, /* complain_on_overflow */ 1172 ppc64_elf_toc_reloc, /* special_function */ 1173 "R_PPC64_TOC16_LO_DS", /* name */ 1174 FALSE, /* partial_inplace */ 1175 0, /* src_mask */ 1176 0xfffc, /* dst_mask */ 1177 FALSE), /* pcrel_offset */ 1178 1179 /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ 1180 /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ 1181 HOWTO (R_PPC64_PLTGOT16_DS, /* type */ 1182 0, /* rightshift */ 1183 1, /* size (0 = byte, 1 = short, 2 = long) */ 1184 16, /* bitsize */ 1185 FALSE, /* pc_relative */ 1186 0, /* bitpos */ 1187 complain_overflow_signed, /* complain_on_overflow */ 1188 ppc64_elf_unhandled_reloc, /* special_function */ 1189 "R_PPC64_PLTGOT16_DS", /* name */ 1190 FALSE, /* partial_inplace */ 1191 0, /* src_mask */ 1192 0xfffc, /* dst_mask */ 1193 FALSE), /* pcrel_offset */ 1194 1195 /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ 1196 /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ 1197 HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */ 1198 0, /* rightshift */ 1199 1, /* size (0 = byte, 1 = short, 2 = long) */ 1200 16, /* bitsize */ 1201 FALSE, /* pc_relative */ 1202 0, /* bitpos */ 1203 complain_overflow_dont, /* complain_on_overflow */ 1204 ppc64_elf_unhandled_reloc, /* special_function */ 1205 "R_PPC64_PLTGOT16_LO_DS",/* name */ 1206 FALSE, /* partial_inplace */ 1207 0, /* src_mask */ 1208 0xfffc, /* dst_mask */ 1209 FALSE), /* pcrel_offset */ 1210 1211 /* Marker reloc for TLS. */ 1212 HOWTO (R_PPC64_TLS, 1213 0, /* rightshift */ 1214 2, /* size (0 = byte, 1 = short, 2 = long) */ 1215 32, /* bitsize */ 1216 FALSE, /* pc_relative */ 1217 0, /* bitpos */ 1218 complain_overflow_dont, /* complain_on_overflow */ 1219 bfd_elf_generic_reloc, /* special_function */ 1220 "R_PPC64_TLS", /* name */ 1221 FALSE, /* partial_inplace */ 1222 0, /* src_mask */ 1223 0, /* dst_mask */ 1224 FALSE), /* pcrel_offset */ 1225 1226 /* Computes the load module index of the load module that contains the 1227 definition of its TLS sym. */ 1228 HOWTO (R_PPC64_DTPMOD64, 1229 0, /* rightshift */ 1230 4, /* size (0 = byte, 1 = short, 2 = long) */ 1231 64, /* bitsize */ 1232 FALSE, /* pc_relative */ 1233 0, /* bitpos */ 1234 complain_overflow_dont, /* complain_on_overflow */ 1235 ppc64_elf_unhandled_reloc, /* special_function */ 1236 "R_PPC64_DTPMOD64", /* name */ 1237 FALSE, /* partial_inplace */ 1238 0, /* src_mask */ 1239 ONES (64), /* dst_mask */ 1240 FALSE), /* pcrel_offset */ 1241 1242 /* Computes a dtv-relative displacement, the difference between the value 1243 of sym+add and the base address of the thread-local storage block that 1244 contains the definition of sym, minus 0x8000. */ 1245 HOWTO (R_PPC64_DTPREL64, 1246 0, /* rightshift */ 1247 4, /* size (0 = byte, 1 = short, 2 = long) */ 1248 64, /* bitsize */ 1249 FALSE, /* pc_relative */ 1250 0, /* bitpos */ 1251 complain_overflow_dont, /* complain_on_overflow */ 1252 ppc64_elf_unhandled_reloc, /* special_function */ 1253 "R_PPC64_DTPREL64", /* name */ 1254 FALSE, /* partial_inplace */ 1255 0, /* src_mask */ 1256 ONES (64), /* dst_mask */ 1257 FALSE), /* pcrel_offset */ 1258 1259 /* A 16 bit dtprel reloc. */ 1260 HOWTO (R_PPC64_DTPREL16, 1261 0, /* rightshift */ 1262 1, /* size (0 = byte, 1 = short, 2 = long) */ 1263 16, /* bitsize */ 1264 FALSE, /* pc_relative */ 1265 0, /* bitpos */ 1266 complain_overflow_signed, /* complain_on_overflow */ 1267 ppc64_elf_unhandled_reloc, /* special_function */ 1268 "R_PPC64_DTPREL16", /* name */ 1269 FALSE, /* partial_inplace */ 1270 0, /* src_mask */ 1271 0xffff, /* dst_mask */ 1272 FALSE), /* pcrel_offset */ 1273 1274 /* Like DTPREL16, but no overflow. */ 1275 HOWTO (R_PPC64_DTPREL16_LO, 1276 0, /* rightshift */ 1277 1, /* size (0 = byte, 1 = short, 2 = long) */ 1278 16, /* bitsize */ 1279 FALSE, /* pc_relative */ 1280 0, /* bitpos */ 1281 complain_overflow_dont, /* complain_on_overflow */ 1282 ppc64_elf_unhandled_reloc, /* special_function */ 1283 "R_PPC64_DTPREL16_LO", /* name */ 1284 FALSE, /* partial_inplace */ 1285 0, /* src_mask */ 1286 0xffff, /* dst_mask */ 1287 FALSE), /* pcrel_offset */ 1288 1289 /* Like DTPREL16_LO, but next higher group of 16 bits. */ 1290 HOWTO (R_PPC64_DTPREL16_HI, 1291 16, /* rightshift */ 1292 1, /* size (0 = byte, 1 = short, 2 = long) */ 1293 16, /* bitsize */ 1294 FALSE, /* pc_relative */ 1295 0, /* bitpos */ 1296 complain_overflow_dont, /* complain_on_overflow */ 1297 ppc64_elf_unhandled_reloc, /* special_function */ 1298 "R_PPC64_DTPREL16_HI", /* name */ 1299 FALSE, /* partial_inplace */ 1300 0, /* src_mask */ 1301 0xffff, /* dst_mask */ 1302 FALSE), /* pcrel_offset */ 1303 1304 /* Like DTPREL16_HI, but adjust for low 16 bits. */ 1305 HOWTO (R_PPC64_DTPREL16_HA, 1306 16, /* rightshift */ 1307 1, /* size (0 = byte, 1 = short, 2 = long) */ 1308 16, /* bitsize */ 1309 FALSE, /* pc_relative */ 1310 0, /* bitpos */ 1311 complain_overflow_dont, /* complain_on_overflow */ 1312 ppc64_elf_unhandled_reloc, /* special_function */ 1313 "R_PPC64_DTPREL16_HA", /* name */ 1314 FALSE, /* partial_inplace */ 1315 0, /* src_mask */ 1316 0xffff, /* dst_mask */ 1317 FALSE), /* pcrel_offset */ 1318 1319 /* Like DTPREL16_HI, but next higher group of 16 bits. */ 1320 HOWTO (R_PPC64_DTPREL16_HIGHER, 1321 32, /* rightshift */ 1322 1, /* size (0 = byte, 1 = short, 2 = long) */ 1323 16, /* bitsize */ 1324 FALSE, /* pc_relative */ 1325 0, /* bitpos */ 1326 complain_overflow_dont, /* complain_on_overflow */ 1327 ppc64_elf_unhandled_reloc, /* special_function */ 1328 "R_PPC64_DTPREL16_HIGHER", /* name */ 1329 FALSE, /* partial_inplace */ 1330 0, /* src_mask */ 1331 0xffff, /* dst_mask */ 1332 FALSE), /* pcrel_offset */ 1333 1334 /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */ 1335 HOWTO (R_PPC64_DTPREL16_HIGHERA, 1336 32, /* rightshift */ 1337 1, /* size (0 = byte, 1 = short, 2 = long) */ 1338 16, /* bitsize */ 1339 FALSE, /* pc_relative */ 1340 0, /* bitpos */ 1341 complain_overflow_dont, /* complain_on_overflow */ 1342 ppc64_elf_unhandled_reloc, /* special_function */ 1343 "R_PPC64_DTPREL16_HIGHERA", /* name */ 1344 FALSE, /* partial_inplace */ 1345 0, /* src_mask */ 1346 0xffff, /* dst_mask */ 1347 FALSE), /* pcrel_offset */ 1348 1349 /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */ 1350 HOWTO (R_PPC64_DTPREL16_HIGHEST, 1351 48, /* rightshift */ 1352 1, /* size (0 = byte, 1 = short, 2 = long) */ 1353 16, /* bitsize */ 1354 FALSE, /* pc_relative */ 1355 0, /* bitpos */ 1356 complain_overflow_dont, /* complain_on_overflow */ 1357 ppc64_elf_unhandled_reloc, /* special_function */ 1358 "R_PPC64_DTPREL16_HIGHEST", /* name */ 1359 FALSE, /* partial_inplace */ 1360 0, /* src_mask */ 1361 0xffff, /* dst_mask */ 1362 FALSE), /* pcrel_offset */ 1363 1364 /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */ 1365 HOWTO (R_PPC64_DTPREL16_HIGHESTA, 1366 48, /* rightshift */ 1367 1, /* size (0 = byte, 1 = short, 2 = long) */ 1368 16, /* bitsize */ 1369 FALSE, /* pc_relative */ 1370 0, /* bitpos */ 1371 complain_overflow_dont, /* complain_on_overflow */ 1372 ppc64_elf_unhandled_reloc, /* special_function */ 1373 "R_PPC64_DTPREL16_HIGHESTA", /* name */ 1374 FALSE, /* partial_inplace */ 1375 0, /* src_mask */ 1376 0xffff, /* dst_mask */ 1377 FALSE), /* pcrel_offset */ 1378 1379 /* Like DTPREL16, but for insns with a DS field. */ 1380 HOWTO (R_PPC64_DTPREL16_DS, 1381 0, /* rightshift */ 1382 1, /* size (0 = byte, 1 = short, 2 = long) */ 1383 16, /* bitsize */ 1384 FALSE, /* pc_relative */ 1385 0, /* bitpos */ 1386 complain_overflow_signed, /* complain_on_overflow */ 1387 ppc64_elf_unhandled_reloc, /* special_function */ 1388 "R_PPC64_DTPREL16_DS", /* name */ 1389 FALSE, /* partial_inplace */ 1390 0, /* src_mask */ 1391 0xfffc, /* dst_mask */ 1392 FALSE), /* pcrel_offset */ 1393 1394 /* Like DTPREL16_DS, but no overflow. */ 1395 HOWTO (R_PPC64_DTPREL16_LO_DS, 1396 0, /* rightshift */ 1397 1, /* size (0 = byte, 1 = short, 2 = long) */ 1398 16, /* bitsize */ 1399 FALSE, /* pc_relative */ 1400 0, /* bitpos */ 1401 complain_overflow_dont, /* complain_on_overflow */ 1402 ppc64_elf_unhandled_reloc, /* special_function */ 1403 "R_PPC64_DTPREL16_LO_DS", /* name */ 1404 FALSE, /* partial_inplace */ 1405 0, /* src_mask */ 1406 0xfffc, /* dst_mask */ 1407 FALSE), /* pcrel_offset */ 1408 1409 /* Computes a tp-relative displacement, the difference between the value of 1410 sym+add and the value of the thread pointer (r13). */ 1411 HOWTO (R_PPC64_TPREL64, 1412 0, /* rightshift */ 1413 4, /* size (0 = byte, 1 = short, 2 = long) */ 1414 64, /* bitsize */ 1415 FALSE, /* pc_relative */ 1416 0, /* bitpos */ 1417 complain_overflow_dont, /* complain_on_overflow */ 1418 ppc64_elf_unhandled_reloc, /* special_function */ 1419 "R_PPC64_TPREL64", /* name */ 1420 FALSE, /* partial_inplace */ 1421 0, /* src_mask */ 1422 ONES (64), /* dst_mask */ 1423 FALSE), /* pcrel_offset */ 1424 1425 /* A 16 bit tprel reloc. */ 1426 HOWTO (R_PPC64_TPREL16, 1427 0, /* rightshift */ 1428 1, /* size (0 = byte, 1 = short, 2 = long) */ 1429 16, /* bitsize */ 1430 FALSE, /* pc_relative */ 1431 0, /* bitpos */ 1432 complain_overflow_signed, /* complain_on_overflow */ 1433 ppc64_elf_unhandled_reloc, /* special_function */ 1434 "R_PPC64_TPREL16", /* name */ 1435 FALSE, /* partial_inplace */ 1436 0, /* src_mask */ 1437 0xffff, /* dst_mask */ 1438 FALSE), /* pcrel_offset */ 1439 1440 /* Like TPREL16, but no overflow. */ 1441 HOWTO (R_PPC64_TPREL16_LO, 1442 0, /* rightshift */ 1443 1, /* size (0 = byte, 1 = short, 2 = long) */ 1444 16, /* bitsize */ 1445 FALSE, /* pc_relative */ 1446 0, /* bitpos */ 1447 complain_overflow_dont, /* complain_on_overflow */ 1448 ppc64_elf_unhandled_reloc, /* special_function */ 1449 "R_PPC64_TPREL16_LO", /* name */ 1450 FALSE, /* partial_inplace */ 1451 0, /* src_mask */ 1452 0xffff, /* dst_mask */ 1453 FALSE), /* pcrel_offset */ 1454 1455 /* Like TPREL16_LO, but next higher group of 16 bits. */ 1456 HOWTO (R_PPC64_TPREL16_HI, 1457 16, /* rightshift */ 1458 1, /* size (0 = byte, 1 = short, 2 = long) */ 1459 16, /* bitsize */ 1460 FALSE, /* pc_relative */ 1461 0, /* bitpos */ 1462 complain_overflow_dont, /* complain_on_overflow */ 1463 ppc64_elf_unhandled_reloc, /* special_function */ 1464 "R_PPC64_TPREL16_HI", /* name */ 1465 FALSE, /* partial_inplace */ 1466 0, /* src_mask */ 1467 0xffff, /* dst_mask */ 1468 FALSE), /* pcrel_offset */ 1469 1470 /* Like TPREL16_HI, but adjust for low 16 bits. */ 1471 HOWTO (R_PPC64_TPREL16_HA, 1472 16, /* rightshift */ 1473 1, /* size (0 = byte, 1 = short, 2 = long) */ 1474 16, /* bitsize */ 1475 FALSE, /* pc_relative */ 1476 0, /* bitpos */ 1477 complain_overflow_dont, /* complain_on_overflow */ 1478 ppc64_elf_unhandled_reloc, /* special_function */ 1479 "R_PPC64_TPREL16_HA", /* name */ 1480 FALSE, /* partial_inplace */ 1481 0, /* src_mask */ 1482 0xffff, /* dst_mask */ 1483 FALSE), /* pcrel_offset */ 1484 1485 /* Like TPREL16_HI, but next higher group of 16 bits. */ 1486 HOWTO (R_PPC64_TPREL16_HIGHER, 1487 32, /* rightshift */ 1488 1, /* size (0 = byte, 1 = short, 2 = long) */ 1489 16, /* bitsize */ 1490 FALSE, /* pc_relative */ 1491 0, /* bitpos */ 1492 complain_overflow_dont, /* complain_on_overflow */ 1493 ppc64_elf_unhandled_reloc, /* special_function */ 1494 "R_PPC64_TPREL16_HIGHER", /* name */ 1495 FALSE, /* partial_inplace */ 1496 0, /* src_mask */ 1497 0xffff, /* dst_mask */ 1498 FALSE), /* pcrel_offset */ 1499 1500 /* Like TPREL16_HIGHER, but adjust for low 16 bits. */ 1501 HOWTO (R_PPC64_TPREL16_HIGHERA, 1502 32, /* rightshift */ 1503 1, /* size (0 = byte, 1 = short, 2 = long) */ 1504 16, /* bitsize */ 1505 FALSE, /* pc_relative */ 1506 0, /* bitpos */ 1507 complain_overflow_dont, /* complain_on_overflow */ 1508 ppc64_elf_unhandled_reloc, /* special_function */ 1509 "R_PPC64_TPREL16_HIGHERA", /* name */ 1510 FALSE, /* partial_inplace */ 1511 0, /* src_mask */ 1512 0xffff, /* dst_mask */ 1513 FALSE), /* pcrel_offset */ 1514 1515 /* Like TPREL16_HIGHER, but next higher group of 16 bits. */ 1516 HOWTO (R_PPC64_TPREL16_HIGHEST, 1517 48, /* rightshift */ 1518 1, /* size (0 = byte, 1 = short, 2 = long) */ 1519 16, /* bitsize */ 1520 FALSE, /* pc_relative */ 1521 0, /* bitpos */ 1522 complain_overflow_dont, /* complain_on_overflow */ 1523 ppc64_elf_unhandled_reloc, /* special_function */ 1524 "R_PPC64_TPREL16_HIGHEST", /* name */ 1525 FALSE, /* partial_inplace */ 1526 0, /* src_mask */ 1527 0xffff, /* dst_mask */ 1528 FALSE), /* pcrel_offset */ 1529 1530 /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */ 1531 HOWTO (R_PPC64_TPREL16_HIGHESTA, 1532 48, /* rightshift */ 1533 1, /* size (0 = byte, 1 = short, 2 = long) */ 1534 16, /* bitsize */ 1535 FALSE, /* pc_relative */ 1536 0, /* bitpos */ 1537 complain_overflow_dont, /* complain_on_overflow */ 1538 ppc64_elf_unhandled_reloc, /* special_function */ 1539 "R_PPC64_TPREL16_HIGHESTA", /* name */ 1540 FALSE, /* partial_inplace */ 1541 0, /* src_mask */ 1542 0xffff, /* dst_mask */ 1543 FALSE), /* pcrel_offset */ 1544 1545 /* Like TPREL16, but for insns with a DS field. */ 1546 HOWTO (R_PPC64_TPREL16_DS, 1547 0, /* rightshift */ 1548 1, /* size (0 = byte, 1 = short, 2 = long) */ 1549 16, /* bitsize */ 1550 FALSE, /* pc_relative */ 1551 0, /* bitpos */ 1552 complain_overflow_signed, /* complain_on_overflow */ 1553 ppc64_elf_unhandled_reloc, /* special_function */ 1554 "R_PPC64_TPREL16_DS", /* name */ 1555 FALSE, /* partial_inplace */ 1556 0, /* src_mask */ 1557 0xfffc, /* dst_mask */ 1558 FALSE), /* pcrel_offset */ 1559 1560 /* Like TPREL16_DS, but no overflow. */ 1561 HOWTO (R_PPC64_TPREL16_LO_DS, 1562 0, /* rightshift */ 1563 1, /* size (0 = byte, 1 = short, 2 = long) */ 1564 16, /* bitsize */ 1565 FALSE, /* pc_relative */ 1566 0, /* bitpos */ 1567 complain_overflow_dont, /* complain_on_overflow */ 1568 ppc64_elf_unhandled_reloc, /* special_function */ 1569 "R_PPC64_TPREL16_LO_DS", /* name */ 1570 FALSE, /* partial_inplace */ 1571 0, /* src_mask */ 1572 0xfffc, /* dst_mask */ 1573 FALSE), /* pcrel_offset */ 1574 1575 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1576 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset 1577 to the first entry relative to the TOC base (r2). */ 1578 HOWTO (R_PPC64_GOT_TLSGD16, 1579 0, /* rightshift */ 1580 1, /* size (0 = byte, 1 = short, 2 = long) */ 1581 16, /* bitsize */ 1582 FALSE, /* pc_relative */ 1583 0, /* bitpos */ 1584 complain_overflow_signed, /* complain_on_overflow */ 1585 ppc64_elf_unhandled_reloc, /* special_function */ 1586 "R_PPC64_GOT_TLSGD16", /* name */ 1587 FALSE, /* partial_inplace */ 1588 0, /* src_mask */ 1589 0xffff, /* dst_mask */ 1590 FALSE), /* pcrel_offset */ 1591 1592 /* Like GOT_TLSGD16, but no overflow. */ 1593 HOWTO (R_PPC64_GOT_TLSGD16_LO, 1594 0, /* rightshift */ 1595 1, /* size (0 = byte, 1 = short, 2 = long) */ 1596 16, /* bitsize */ 1597 FALSE, /* pc_relative */ 1598 0, /* bitpos */ 1599 complain_overflow_dont, /* complain_on_overflow */ 1600 ppc64_elf_unhandled_reloc, /* special_function */ 1601 "R_PPC64_GOT_TLSGD16_LO", /* name */ 1602 FALSE, /* partial_inplace */ 1603 0, /* src_mask */ 1604 0xffff, /* dst_mask */ 1605 FALSE), /* pcrel_offset */ 1606 1607 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ 1608 HOWTO (R_PPC64_GOT_TLSGD16_HI, 1609 16, /* rightshift */ 1610 1, /* size (0 = byte, 1 = short, 2 = long) */ 1611 16, /* bitsize */ 1612 FALSE, /* pc_relative */ 1613 0, /* bitpos */ 1614 complain_overflow_dont, /* complain_on_overflow */ 1615 ppc64_elf_unhandled_reloc, /* special_function */ 1616 "R_PPC64_GOT_TLSGD16_HI", /* name */ 1617 FALSE, /* partial_inplace */ 1618 0, /* src_mask */ 1619 0xffff, /* dst_mask */ 1620 FALSE), /* pcrel_offset */ 1621 1622 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ 1623 HOWTO (R_PPC64_GOT_TLSGD16_HA, 1624 16, /* rightshift */ 1625 1, /* size (0 = byte, 1 = short, 2 = long) */ 1626 16, /* bitsize */ 1627 FALSE, /* pc_relative */ 1628 0, /* bitpos */ 1629 complain_overflow_dont, /* complain_on_overflow */ 1630 ppc64_elf_unhandled_reloc, /* special_function */ 1631 "R_PPC64_GOT_TLSGD16_HA", /* name */ 1632 FALSE, /* partial_inplace */ 1633 0, /* src_mask */ 1634 0xffff, /* dst_mask */ 1635 FALSE), /* pcrel_offset */ 1636 1637 /* Allocates two contiguous entries in the GOT to hold a tls_index structure, 1638 with values (sym+add)@dtpmod and zero, and computes the offset to the 1639 first entry relative to the TOC base (r2). */ 1640 HOWTO (R_PPC64_GOT_TLSLD16, 1641 0, /* rightshift */ 1642 1, /* size (0 = byte, 1 = short, 2 = long) */ 1643 16, /* bitsize */ 1644 FALSE, /* pc_relative */ 1645 0, /* bitpos */ 1646 complain_overflow_signed, /* complain_on_overflow */ 1647 ppc64_elf_unhandled_reloc, /* special_function */ 1648 "R_PPC64_GOT_TLSLD16", /* name */ 1649 FALSE, /* partial_inplace */ 1650 0, /* src_mask */ 1651 0xffff, /* dst_mask */ 1652 FALSE), /* pcrel_offset */ 1653 1654 /* Like GOT_TLSLD16, but no overflow. */ 1655 HOWTO (R_PPC64_GOT_TLSLD16_LO, 1656 0, /* rightshift */ 1657 1, /* size (0 = byte, 1 = short, 2 = long) */ 1658 16, /* bitsize */ 1659 FALSE, /* pc_relative */ 1660 0, /* bitpos */ 1661 complain_overflow_dont, /* complain_on_overflow */ 1662 ppc64_elf_unhandled_reloc, /* special_function */ 1663 "R_PPC64_GOT_TLSLD16_LO", /* name */ 1664 FALSE, /* partial_inplace */ 1665 0, /* src_mask */ 1666 0xffff, /* dst_mask */ 1667 FALSE), /* pcrel_offset */ 1668 1669 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ 1670 HOWTO (R_PPC64_GOT_TLSLD16_HI, 1671 16, /* rightshift */ 1672 1, /* size (0 = byte, 1 = short, 2 = long) */ 1673 16, /* bitsize */ 1674 FALSE, /* pc_relative */ 1675 0, /* bitpos */ 1676 complain_overflow_dont, /* complain_on_overflow */ 1677 ppc64_elf_unhandled_reloc, /* special_function */ 1678 "R_PPC64_GOT_TLSLD16_HI", /* name */ 1679 FALSE, /* partial_inplace */ 1680 0, /* src_mask */ 1681 0xffff, /* dst_mask */ 1682 FALSE), /* pcrel_offset */ 1683 1684 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ 1685 HOWTO (R_PPC64_GOT_TLSLD16_HA, 1686 16, /* rightshift */ 1687 1, /* size (0 = byte, 1 = short, 2 = long) */ 1688 16, /* bitsize */ 1689 FALSE, /* pc_relative */ 1690 0, /* bitpos */ 1691 complain_overflow_dont, /* complain_on_overflow */ 1692 ppc64_elf_unhandled_reloc, /* special_function */ 1693 "R_PPC64_GOT_TLSLD16_HA", /* name */ 1694 FALSE, /* partial_inplace */ 1695 0, /* src_mask */ 1696 0xffff, /* dst_mask */ 1697 FALSE), /* pcrel_offset */ 1698 1699 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes 1700 the offset to the entry relative to the TOC base (r2). */ 1701 HOWTO (R_PPC64_GOT_DTPREL16_DS, 1702 0, /* rightshift */ 1703 1, /* size (0 = byte, 1 = short, 2 = long) */ 1704 16, /* bitsize */ 1705 FALSE, /* pc_relative */ 1706 0, /* bitpos */ 1707 complain_overflow_signed, /* complain_on_overflow */ 1708 ppc64_elf_unhandled_reloc, /* special_function */ 1709 "R_PPC64_GOT_DTPREL16_DS", /* name */ 1710 FALSE, /* partial_inplace */ 1711 0, /* src_mask */ 1712 0xfffc, /* dst_mask */ 1713 FALSE), /* pcrel_offset */ 1714 1715 /* Like GOT_DTPREL16_DS, but no overflow. */ 1716 HOWTO (R_PPC64_GOT_DTPREL16_LO_DS, 1717 0, /* rightshift */ 1718 1, /* size (0 = byte, 1 = short, 2 = long) */ 1719 16, /* bitsize */ 1720 FALSE, /* pc_relative */ 1721 0, /* bitpos */ 1722 complain_overflow_dont, /* complain_on_overflow */ 1723 ppc64_elf_unhandled_reloc, /* special_function */ 1724 "R_PPC64_GOT_DTPREL16_LO_DS", /* name */ 1725 FALSE, /* partial_inplace */ 1726 0, /* src_mask */ 1727 0xfffc, /* dst_mask */ 1728 FALSE), /* pcrel_offset */ 1729 1730 /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */ 1731 HOWTO (R_PPC64_GOT_DTPREL16_HI, 1732 16, /* rightshift */ 1733 1, /* size (0 = byte, 1 = short, 2 = long) */ 1734 16, /* bitsize */ 1735 FALSE, /* pc_relative */ 1736 0, /* bitpos */ 1737 complain_overflow_dont, /* complain_on_overflow */ 1738 ppc64_elf_unhandled_reloc, /* special_function */ 1739 "R_PPC64_GOT_DTPREL16_HI", /* name */ 1740 FALSE, /* partial_inplace */ 1741 0, /* src_mask */ 1742 0xffff, /* dst_mask */ 1743 FALSE), /* pcrel_offset */ 1744 1745 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ 1746 HOWTO (R_PPC64_GOT_DTPREL16_HA, 1747 16, /* rightshift */ 1748 1, /* size (0 = byte, 1 = short, 2 = long) */ 1749 16, /* bitsize */ 1750 FALSE, /* pc_relative */ 1751 0, /* bitpos */ 1752 complain_overflow_dont, /* complain_on_overflow */ 1753 ppc64_elf_unhandled_reloc, /* special_function */ 1754 "R_PPC64_GOT_DTPREL16_HA", /* name */ 1755 FALSE, /* partial_inplace */ 1756 0, /* src_mask */ 1757 0xffff, /* dst_mask */ 1758 FALSE), /* pcrel_offset */ 1759 1760 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the 1761 offset to the entry relative to the TOC base (r2). */ 1762 HOWTO (R_PPC64_GOT_TPREL16_DS, 1763 0, /* rightshift */ 1764 1, /* size (0 = byte, 1 = short, 2 = long) */ 1765 16, /* bitsize */ 1766 FALSE, /* pc_relative */ 1767 0, /* bitpos */ 1768 complain_overflow_signed, /* complain_on_overflow */ 1769 ppc64_elf_unhandled_reloc, /* special_function */ 1770 "R_PPC64_GOT_TPREL16_DS", /* name */ 1771 FALSE, /* partial_inplace */ 1772 0, /* src_mask */ 1773 0xfffc, /* dst_mask */ 1774 FALSE), /* pcrel_offset */ 1775 1776 /* Like GOT_TPREL16_DS, but no overflow. */ 1777 HOWTO (R_PPC64_GOT_TPREL16_LO_DS, 1778 0, /* rightshift */ 1779 1, /* size (0 = byte, 1 = short, 2 = long) */ 1780 16, /* bitsize */ 1781 FALSE, /* pc_relative */ 1782 0, /* bitpos */ 1783 complain_overflow_dont, /* complain_on_overflow */ 1784 ppc64_elf_unhandled_reloc, /* special_function */ 1785 "R_PPC64_GOT_TPREL16_LO_DS", /* name */ 1786 FALSE, /* partial_inplace */ 1787 0, /* src_mask */ 1788 0xfffc, /* dst_mask */ 1789 FALSE), /* pcrel_offset */ 1790 1791 /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */ 1792 HOWTO (R_PPC64_GOT_TPREL16_HI, 1793 16, /* rightshift */ 1794 1, /* size (0 = byte, 1 = short, 2 = long) */ 1795 16, /* bitsize */ 1796 FALSE, /* pc_relative */ 1797 0, /* bitpos */ 1798 complain_overflow_dont, /* complain_on_overflow */ 1799 ppc64_elf_unhandled_reloc, /* special_function */ 1800 "R_PPC64_GOT_TPREL16_HI", /* name */ 1801 FALSE, /* partial_inplace */ 1802 0, /* src_mask */ 1803 0xffff, /* dst_mask */ 1804 FALSE), /* pcrel_offset */ 1805 1806 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ 1807 HOWTO (R_PPC64_GOT_TPREL16_HA, 1808 16, /* rightshift */ 1809 1, /* size (0 = byte, 1 = short, 2 = long) */ 1810 16, /* bitsize */ 1811 FALSE, /* pc_relative */ 1812 0, /* bitpos */ 1813 complain_overflow_dont, /* complain_on_overflow */ 1814 ppc64_elf_unhandled_reloc, /* special_function */ 1815 "R_PPC64_GOT_TPREL16_HA", /* name */ 1816 FALSE, /* partial_inplace */ 1817 0, /* src_mask */ 1818 0xffff, /* dst_mask */ 1819 FALSE), /* pcrel_offset */ 1820 1821 /* GNU extension to record C++ vtable hierarchy. */ 1822 HOWTO (R_PPC64_GNU_VTINHERIT, /* type */ 1823 0, /* rightshift */ 1824 0, /* size (0 = byte, 1 = short, 2 = long) */ 1825 0, /* bitsize */ 1826 FALSE, /* pc_relative */ 1827 0, /* bitpos */ 1828 complain_overflow_dont, /* complain_on_overflow */ 1829 NULL, /* special_function */ 1830 "R_PPC64_GNU_VTINHERIT", /* name */ 1831 FALSE, /* partial_inplace */ 1832 0, /* src_mask */ 1833 0, /* dst_mask */ 1834 FALSE), /* pcrel_offset */ 1835 1836 /* GNU extension to record C++ vtable member usage. */ 1837 HOWTO (R_PPC64_GNU_VTENTRY, /* type */ 1838 0, /* rightshift */ 1839 0, /* size (0 = byte, 1 = short, 2 = long) */ 1840 0, /* bitsize */ 1841 FALSE, /* pc_relative */ 1842 0, /* bitpos */ 1843 complain_overflow_dont, /* complain_on_overflow */ 1844 NULL, /* special_function */ 1845 "R_PPC64_GNU_VTENTRY", /* name */ 1846 FALSE, /* partial_inplace */ 1847 0, /* src_mask */ 1848 0, /* dst_mask */ 1849 FALSE), /* pcrel_offset */ 1850 }; 1851 1852 1853 /* Initialize the ppc64_elf_howto_table, so that linear accesses can 1854 be done. */ 1855 1856 static void 1857 ppc_howto_init (void) 1858 { 1859 unsigned int i, type; 1860 1861 for (i = 0; 1862 i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]); 1863 i++) 1864 { 1865 type = ppc64_elf_howto_raw[i].type; 1866 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) 1867 / sizeof (ppc64_elf_howto_table[0]))); 1868 ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; 1869 } 1870 } 1871 1872 static reloc_howto_type * 1873 ppc64_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, 1874 bfd_reloc_code_real_type code) 1875 { 1876 enum elf_ppc64_reloc_type r = R_PPC64_NONE; 1877 1878 if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) 1879 /* Initialize howto table if needed. */ 1880 ppc_howto_init (); 1881 1882 switch (code) 1883 { 1884 default: 1885 return NULL; 1886 1887 case BFD_RELOC_NONE: r = R_PPC64_NONE; 1888 break; 1889 case BFD_RELOC_32: r = R_PPC64_ADDR32; 1890 break; 1891 case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24; 1892 break; 1893 case BFD_RELOC_16: r = R_PPC64_ADDR16; 1894 break; 1895 case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO; 1896 break; 1897 case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI; 1898 break; 1899 case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA; 1900 break; 1901 case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14; 1902 break; 1903 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN; 1904 break; 1905 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN; 1906 break; 1907 case BFD_RELOC_PPC_B26: r = R_PPC64_REL24; 1908 break; 1909 case BFD_RELOC_PPC_B16: r = R_PPC64_REL14; 1910 break; 1911 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN; 1912 break; 1913 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN; 1914 break; 1915 case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16; 1916 break; 1917 case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO; 1918 break; 1919 case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI; 1920 break; 1921 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA; 1922 break; 1923 case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY; 1924 break; 1925 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT; 1926 break; 1927 case BFD_RELOC_32_PCREL: r = R_PPC64_REL32; 1928 break; 1929 case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32; 1930 break; 1931 case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32; 1932 break; 1933 case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO; 1934 break; 1935 case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI; 1936 break; 1937 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA; 1938 break; 1939 case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF; 1940 break; 1941 case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO; 1942 break; 1943 case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI; 1944 break; 1945 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA; 1946 break; 1947 case BFD_RELOC_CTOR: r = R_PPC64_ADDR64; 1948 break; 1949 case BFD_RELOC_64: r = R_PPC64_ADDR64; 1950 break; 1951 case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER; 1952 break; 1953 case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA; 1954 break; 1955 case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST; 1956 break; 1957 case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA; 1958 break; 1959 case BFD_RELOC_64_PCREL: r = R_PPC64_REL64; 1960 break; 1961 case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64; 1962 break; 1963 case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64; 1964 break; 1965 case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16; 1966 break; 1967 case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO; 1968 break; 1969 case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI; 1970 break; 1971 case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA; 1972 break; 1973 case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC; 1974 break; 1975 case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16; 1976 break; 1977 case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO; 1978 break; 1979 case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI; 1980 break; 1981 case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA; 1982 break; 1983 case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS; 1984 break; 1985 case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS; 1986 break; 1987 case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS; 1988 break; 1989 case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS; 1990 break; 1991 case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS; 1992 break; 1993 case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS; 1994 break; 1995 case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS; 1996 break; 1997 case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS; 1998 break; 1999 case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS; 2000 break; 2001 case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS; 2002 break; 2003 case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS; 2004 break; 2005 case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS; 2006 break; 2007 case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64; 2008 break; 2009 case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16; 2010 break; 2011 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO; 2012 break; 2013 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI; 2014 break; 2015 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA; 2016 break; 2017 case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64; 2018 break; 2019 case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16; 2020 break; 2021 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO; 2022 break; 2023 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI; 2024 break; 2025 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA; 2026 break; 2027 case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64; 2028 break; 2029 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16; 2030 break; 2031 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO; 2032 break; 2033 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI; 2034 break; 2035 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA; 2036 break; 2037 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16; 2038 break; 2039 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO; 2040 break; 2041 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI; 2042 break; 2043 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA; 2044 break; 2045 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS; 2046 break; 2047 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS; 2048 break; 2049 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI; 2050 break; 2051 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA; 2052 break; 2053 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS; 2054 break; 2055 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS; 2056 break; 2057 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI; 2058 break; 2059 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA; 2060 break; 2061 case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS; 2062 break; 2063 case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS; 2064 break; 2065 case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER; 2066 break; 2067 case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA; 2068 break; 2069 case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST; 2070 break; 2071 case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA; 2072 break; 2073 case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS; 2074 break; 2075 case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS; 2076 break; 2077 case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER; 2078 break; 2079 case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA; 2080 break; 2081 case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST; 2082 break; 2083 case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA; 2084 break; 2085 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT; 2086 break; 2087 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY; 2088 break; 2089 } 2090 2091 return ppc64_elf_howto_table[r]; 2092 }; 2093 2094 /* Set the howto pointer for a PowerPC ELF reloc. */ 2095 2096 static void 2097 ppc64_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, 2098 Elf_Internal_Rela *dst) 2099 { 2100 unsigned int type; 2101 2102 /* Initialize howto table if needed. */ 2103 if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) 2104 ppc_howto_init (); 2105 2106 type = ELF64_R_TYPE (dst->r_info); 2107 BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) 2108 / sizeof (ppc64_elf_howto_table[0]))); 2109 cache_ptr->howto = ppc64_elf_howto_table[type]; 2110 } 2111 2112 /* Handle the R_PPC64_ADDR16_HA and similar relocs. */ 2113 2114 static bfd_reloc_status_type 2115 ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2116 void *data, asection *input_section, 2117 bfd *output_bfd, char **error_message) 2118 { 2119 /* If this is a relocatable link (output_bfd test tells us), just 2120 call the generic function. Any adjustment will be done at final 2121 link time. */ 2122 if (output_bfd != NULL) 2123 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2124 input_section, output_bfd, error_message); 2125 2126 /* Adjust the addend for sign extension of the low 16 bits. 2127 We won't actually be using the low 16 bits, so trashing them 2128 doesn't matter. */ 2129 reloc_entry->addend += 0x8000; 2130 return bfd_reloc_continue; 2131 } 2132 2133 static bfd_reloc_status_type 2134 ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2135 void *data, asection *input_section, 2136 bfd *output_bfd, char **error_message) 2137 { 2138 long insn; 2139 enum elf_ppc64_reloc_type r_type; 2140 bfd_size_type octets; 2141 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ 2142 bfd_boolean is_power4 = FALSE; 2143 2144 /* If this is a relocatable link (output_bfd test tells us), just 2145 call the generic function. Any adjustment will be done at final 2146 link time. */ 2147 if (output_bfd != NULL) 2148 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2149 input_section, output_bfd, error_message); 2150 2151 octets = reloc_entry->address * bfd_octets_per_byte (abfd); 2152 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); 2153 insn &= ~(0x01 << 21); 2154 r_type = reloc_entry->howto->type; 2155 if (r_type == R_PPC64_ADDR14_BRTAKEN 2156 || r_type == R_PPC64_REL14_BRTAKEN) 2157 insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ 2158 2159 if (is_power4) 2160 { 2161 /* Set 'a' bit. This is 0b00010 in BO field for branch 2162 on CR(BI) insns (BO == 001at or 011at), and 0b01000 2163 for branch on CTR insns (BO == 1a00t or 1a01t). */ 2164 if ((insn & (0x14 << 21)) == (0x04 << 21)) 2165 insn |= 0x02 << 21; 2166 else if ((insn & (0x14 << 21)) == (0x10 << 21)) 2167 insn |= 0x08 << 21; 2168 else 2169 return bfd_reloc_continue; 2170 } 2171 else 2172 { 2173 bfd_vma target = 0; 2174 bfd_vma from; 2175 2176 if (!bfd_is_com_section (symbol->section)) 2177 target = symbol->value; 2178 target += symbol->section->output_section->vma; 2179 target += symbol->section->output_offset; 2180 target += reloc_entry->addend; 2181 2182 from = (reloc_entry->address 2183 + input_section->output_offset 2184 + input_section->output_section->vma); 2185 2186 /* Invert 'y' bit if not the default. */ 2187 if ((bfd_signed_vma) (target - from) < 0) 2188 insn ^= 0x01 << 21; 2189 } 2190 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); 2191 return bfd_reloc_continue; 2192 } 2193 2194 static bfd_reloc_status_type 2195 ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2196 void *data, asection *input_section, 2197 bfd *output_bfd, char **error_message) 2198 { 2199 /* If this is a relocatable link (output_bfd test tells us), just 2200 call the generic function. Any adjustment will be done at final 2201 link time. */ 2202 if (output_bfd != NULL) 2203 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2204 input_section, output_bfd, error_message); 2205 2206 /* Subtract the symbol section base address. */ 2207 reloc_entry->addend -= symbol->section->output_section->vma; 2208 return bfd_reloc_continue; 2209 } 2210 2211 static bfd_reloc_status_type 2212 ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2213 void *data, asection *input_section, 2214 bfd *output_bfd, char **error_message) 2215 { 2216 /* If this is a relocatable link (output_bfd test tells us), just 2217 call the generic function. Any adjustment will be done at final 2218 link time. */ 2219 if (output_bfd != NULL) 2220 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2221 input_section, output_bfd, error_message); 2222 2223 /* Subtract the symbol section base address. */ 2224 reloc_entry->addend -= symbol->section->output_section->vma; 2225 2226 /* Adjust the addend for sign extension of the low 16 bits. */ 2227 reloc_entry->addend += 0x8000; 2228 return bfd_reloc_continue; 2229 } 2230 2231 static bfd_reloc_status_type 2232 ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2233 void *data, asection *input_section, 2234 bfd *output_bfd, char **error_message) 2235 { 2236 bfd_vma TOCstart; 2237 2238 /* If this is a relocatable link (output_bfd test tells us), just 2239 call the generic function. Any adjustment will be done at final 2240 link time. */ 2241 if (output_bfd != NULL) 2242 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2243 input_section, output_bfd, error_message); 2244 2245 TOCstart = _bfd_get_gp_value (input_section->output_section->owner); 2246 if (TOCstart == 0) 2247 TOCstart = ppc64_elf_toc (input_section->output_section->owner); 2248 2249 /* Subtract the TOC base address. */ 2250 reloc_entry->addend -= TOCstart + TOC_BASE_OFF; 2251 return bfd_reloc_continue; 2252 } 2253 2254 static bfd_reloc_status_type 2255 ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2256 void *data, asection *input_section, 2257 bfd *output_bfd, char **error_message) 2258 { 2259 bfd_vma TOCstart; 2260 2261 /* If this is a relocatable link (output_bfd test tells us), just 2262 call the generic function. Any adjustment will be done at final 2263 link time. */ 2264 if (output_bfd != NULL) 2265 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2266 input_section, output_bfd, error_message); 2267 2268 TOCstart = _bfd_get_gp_value (input_section->output_section->owner); 2269 if (TOCstart == 0) 2270 TOCstart = ppc64_elf_toc (input_section->output_section->owner); 2271 2272 /* Subtract the TOC base address. */ 2273 reloc_entry->addend -= TOCstart + TOC_BASE_OFF; 2274 2275 /* Adjust the addend for sign extension of the low 16 bits. */ 2276 reloc_entry->addend += 0x8000; 2277 return bfd_reloc_continue; 2278 } 2279 2280 static bfd_reloc_status_type 2281 ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2282 void *data, asection *input_section, 2283 bfd *output_bfd, char **error_message) 2284 { 2285 bfd_vma TOCstart; 2286 bfd_size_type octets; 2287 2288 /* If this is a relocatable link (output_bfd test tells us), just 2289 call the generic function. Any adjustment will be done at final 2290 link time. */ 2291 if (output_bfd != NULL) 2292 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2293 input_section, output_bfd, error_message); 2294 2295 TOCstart = _bfd_get_gp_value (input_section->output_section->owner); 2296 if (TOCstart == 0) 2297 TOCstart = ppc64_elf_toc (input_section->output_section->owner); 2298 2299 octets = reloc_entry->address * bfd_octets_per_byte (abfd); 2300 bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); 2301 return bfd_reloc_ok; 2302 } 2303 2304 static bfd_reloc_status_type 2305 ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, 2306 void *data, asection *input_section, 2307 bfd *output_bfd, char **error_message) 2308 { 2309 /* If this is a relocatable link (output_bfd test tells us), just 2310 call the generic function. Any adjustment will be done at final 2311 link time. */ 2312 if (output_bfd != NULL) 2313 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, 2314 input_section, output_bfd, error_message); 2315 2316 if (error_message != NULL) 2317 { 2318 static char buf[60]; 2319 sprintf (buf, "generic linker can't handle %s", 2320 reloc_entry->howto->name); 2321 *error_message = buf; 2322 } 2323 return bfd_reloc_dangerous; 2324 } 2325 2326 struct ppc64_elf_obj_tdata 2327 { 2328 struct elf_obj_tdata elf; 2329 2330 /* Shortcuts to dynamic linker sections. */ 2331 asection *got; 2332 asection *relgot; 2333 2334 /* TLS local dynamic got entry handling. Suppose for multiple GOT 2335 sections means we potentially need one of these for each input bfd. */ 2336 union { 2337 bfd_signed_vma refcount; 2338 bfd_vma offset; 2339 } tlsld_got; 2340 }; 2341 2342 #define ppc64_elf_tdata(bfd) \ 2343 ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any) 2344 2345 #define ppc64_tlsld_got(bfd) \ 2346 (&ppc64_elf_tdata (bfd)->tlsld_got) 2347 2348 /* Override the generic function because we store some extras. */ 2349 2350 static bfd_boolean 2351 ppc64_elf_mkobject (bfd *abfd) 2352 { 2353 bfd_size_type amt = sizeof (struct ppc64_elf_obj_tdata); 2354 abfd->tdata.any = bfd_zalloc (abfd, amt); 2355 if (abfd->tdata.any == NULL) 2356 return FALSE; 2357 return TRUE; 2358 } 2359 2360 /* Fix bad default arch selected for a 64 bit input bfd when the 2361 default is 32 bit. */ 2362 2363 static bfd_boolean 2364 ppc64_elf_object_p (bfd *abfd) 2365 { 2366 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32) 2367 { 2368 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); 2369 2370 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64) 2371 { 2372 /* Relies on arch after 32 bit default being 64 bit default. */ 2373 abfd->arch_info = abfd->arch_info->next; 2374 BFD_ASSERT (abfd->arch_info->bits_per_word == 64); 2375 } 2376 } 2377 return TRUE; 2378 } 2379 2380 /* Support for core dump NOTE sections. */ 2381 2382 static bfd_boolean 2383 ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) 2384 { 2385 size_t offset, raw_size; 2386 2387 if (note->descsz != 504) 2388 return FALSE; 2389 2390 /* pr_cursig */ 2391 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); 2392 2393 /* pr_pid */ 2394 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 32); 2395 2396 /* pr_reg */ 2397 offset = 112; 2398 raw_size = 384; 2399 2400 /* Make a ".reg/999" section. */ 2401 return _bfd_elfcore_make_pseudosection (abfd, ".reg", 2402 raw_size, note->descpos + offset); 2403 } 2404 2405 static bfd_boolean 2406 ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) 2407 { 2408 if (note->descsz != 136) 2409 return FALSE; 2410 2411 elf_tdata (abfd)->core_program 2412 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); 2413 elf_tdata (abfd)->core_command 2414 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); 2415 2416 return TRUE; 2417 } 2418 2419 /* Merge backend specific data from an object file to the output 2420 object file when linking. */ 2421 2422 static bfd_boolean 2423 ppc64_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) 2424 { 2425 /* Check if we have the same endianess. */ 2426 if (ibfd->xvec->byteorder != obfd->xvec->byteorder 2427 && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN 2428 && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) 2429 { 2430 const char *msg; 2431 2432 if (bfd_big_endian (ibfd)) 2433 msg = _("%s: compiled for a big endian system " 2434 "and target is little endian"); 2435 else 2436 msg = _("%s: compiled for a little endian system " 2437 "and target is big endian"); 2438 2439 (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd)); 2440 2441 bfd_set_error (bfd_error_wrong_format); 2442 return FALSE; 2443 } 2444 2445 return TRUE; 2446 } 2447 2448 /* Add extra PPC sections. */ 2449 2450 static struct bfd_elf_special_section const ppc64_elf_special_sections[]= 2451 { 2452 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2453 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 2454 { ".plt", 4, 0, SHT_NOBITS, 0 }, 2455 { ".toc", 4, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2456 { ".toc1", 5, 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, 2457 { ".tocbss", 7, 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, 2458 { NULL, 0, 0, 0, 0 } 2459 }; 2460 2461 struct _ppc64_elf_section_data 2462 { 2463 struct bfd_elf_section_data elf; 2464 2465 /* An array with one entry for each opd function descriptor. */ 2466 union 2467 { 2468 /* Points to the function code section for local opd entries. */ 2469 asection **func_sec; 2470 /* After editing .opd, adjust references to opd local syms. */ 2471 long *adjust; 2472 } opd; 2473 2474 /* An array for toc sections, indexed by offset/8. 2475 Specifies the relocation symbol index used at a given toc offset. */ 2476 unsigned *t_symndx; 2477 }; 2478 2479 #define ppc64_elf_section_data(sec) \ 2480 ((struct _ppc64_elf_section_data *) elf_section_data (sec)) 2481 2482 static bfd_boolean 2483 ppc64_elf_new_section_hook (bfd *abfd, asection *sec) 2484 { 2485 struct _ppc64_elf_section_data *sdata; 2486 bfd_size_type amt = sizeof (*sdata); 2487 2488 sdata = bfd_zalloc (abfd, amt); 2489 if (sdata == NULL) 2490 return FALSE; 2491 sec->used_by_bfd = sdata; 2492 2493 return _bfd_elf_new_section_hook (abfd, sec); 2494 } 2495 2496 /* The following functions are specific to the ELF linker, while 2497 functions above are used generally. Those named ppc64_elf_* are 2498 called by the main ELF linker code. They appear in this file more 2499 or less in the order in which they are called. eg. 2500 ppc64_elf_check_relocs is called early in the link process, 2501 ppc64_elf_finish_dynamic_sections is one of the last functions 2502 called. 2503 2504 PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that 2505 functions have both a function code symbol and a function descriptor 2506 symbol. A call to foo in a relocatable object file looks like: 2507 2508 . .text 2509 . x: 2510 . bl .foo 2511 . nop 2512 2513 The function definition in another object file might be: 2514 2515 . .section .opd 2516 . foo: .quad .foo 2517 . .quad .TOC.@tocbase 2518 . .quad 0 2519 . 2520 . .text 2521 . .foo: blr 2522 2523 When the linker resolves the call during a static link, the branch 2524 unsurprisingly just goes to .foo and the .opd information is unused. 2525 If the function definition is in a shared library, things are a little 2526 different: The call goes via a plt call stub, the opd information gets 2527 copied to the plt, and the linker patches the nop. 2528 2529 . x: 2530 . bl .foo_stub 2531 . ld 2,40(1) 2532 . 2533 . 2534 . .foo_stub: 2535 . addis 12,2,Lfoo@toc@ha # in practice, the call stub 2536 . addi 12,12,Lfoo@toc@l # is slightly optimized, but 2537 . std 2,40(1) # this is the general idea 2538 . ld 11,0(12) 2539 . ld 2,8(12) 2540 . mtctr 11 2541 . ld 11,16(12) 2542 . bctr 2543 . 2544 . .section .plt 2545 . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) 2546 2547 The "reloc ()" notation is supposed to indicate that the linker emits 2548 an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd 2549 copying. 2550 2551 What are the difficulties here? Well, firstly, the relocations 2552 examined by the linker in check_relocs are against the function code 2553 sym .foo, while the dynamic relocation in the plt is emitted against 2554 the function descriptor symbol, foo. Somewhere along the line, we need 2555 to carefully copy dynamic link information from one symbol to the other. 2556 Secondly, the generic part of the elf linker will make .foo a dynamic 2557 symbol as is normal for most other backends. We need foo dynamic 2558 instead, at least for an application final link. However, when 2559 creating a shared library containing foo, we need to have both symbols 2560 dynamic so that references to .foo are satisfied during the early 2561 stages of linking. Otherwise the linker might decide to pull in a 2562 definition from some other object, eg. a static library. */ 2563 2564 /* The linker needs to keep track of the number of relocs that it 2565 decides to copy as dynamic relocs in check_relocs for each symbol. 2566 This is so that it can later discard them if they are found to be 2567 unnecessary. We store the information in a field extending the 2568 regular ELF linker hash table. */ 2569 2570 struct ppc_dyn_relocs 2571 { 2572 struct ppc_dyn_relocs *next; 2573 2574 /* The input section of the reloc. */ 2575 asection *sec; 2576 2577 /* Total number of relocs copied for the input section. */ 2578 bfd_size_type count; 2579 2580 /* Number of pc-relative relocs copied for the input section. */ 2581 bfd_size_type pc_count; 2582 }; 2583 2584 /* Track GOT entries needed for a given symbol. We might need more 2585 than one got entry per symbol. */ 2586 struct got_entry 2587 { 2588 struct got_entry *next; 2589 2590 /* The symbol addend that we'll be placing in the GOT. */ 2591 bfd_vma addend; 2592 2593 /* Unlike other ELF targets, we use separate GOT entries for the same 2594 symbol referenced from different input files. This is to support 2595 automatic multiple TOC/GOT sections, where the TOC base can vary 2596 from one input file to another. 2597 2598 Point to the BFD owning this GOT entry. */ 2599 bfd *owner; 2600 2601 /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD, 2602 TLS_TPREL or TLS_DTPREL for tls entries. */ 2603 char tls_type; 2604 2605 /* Reference count until size_dynamic_sections, GOT offset thereafter. */ 2606 union 2607 { 2608 bfd_signed_vma refcount; 2609 bfd_vma offset; 2610 } got; 2611 }; 2612 2613 /* The same for PLT. */ 2614 struct plt_entry 2615 { 2616 struct plt_entry *next; 2617 2618 bfd_vma addend; 2619 2620 union 2621 { 2622 bfd_signed_vma refcount; 2623 bfd_vma offset; 2624 } plt; 2625 }; 2626 2627 /* Of those relocs that might be copied as dynamic relocs, this macro 2628 selects those that must be copied when linking a shared library, 2629 even when the symbol is local. */ 2630 2631 #define MUST_BE_DYN_RELOC(RTYPE) \ 2632 ((RTYPE) != R_PPC64_REL32 \ 2633 && (RTYPE) != R_PPC64_REL64 \ 2634 && (RTYPE) != R_PPC64_REL30) 2635 2636 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid 2637 copying dynamic variables from a shared lib into an app's dynbss 2638 section, and instead use a dynamic relocation to point into the 2639 shared lib. With code that gcc generates, it's vital that this be 2640 enabled; In the PowerPC64 ABI, the address of a function is actually 2641 the address of a function descriptor, which resides in the .opd 2642 section. gcc uses the descriptor directly rather than going via the 2643 GOT as some other ABI's do, which means that initialized function 2644 pointers must reference the descriptor. Thus, a function pointer 2645 initialized to the address of a function in a shared library will 2646 either require a copy reloc, or a dynamic reloc. Using a copy reloc 2647 redefines the function descriptor symbol to point to the copy. This 2648 presents a problem as a plt entry for that function is also 2649 initialized from the function descriptor symbol and the copy reloc 2650 may not be initialized first. */ 2651 #define ELIMINATE_COPY_RELOCS 1 2652 2653 /* Section name for stubs is the associated section name plus this 2654 string. */ 2655 #define STUB_SUFFIX ".stub" 2656 2657 /* Linker stubs. 2658 ppc_stub_long_branch: 2659 Used when a 14 bit branch (or even a 24 bit branch) can't reach its 2660 destination, but a 24 bit branch in a stub section will reach. 2661 . b dest 2662 2663 ppc_stub_plt_branch: 2664 Similar to the above, but a 24 bit branch in the stub section won't 2665 reach its destination. 2666 . addis %r12,%r2,xxx@toc@ha 2667 . ld %r11,xxx@toc@l(%r12) 2668 . mtctr %r11 2669 . bctr 2670 2671 ppc_stub_plt_call: 2672 Used to call a function in a shared library. 2673 . addis %r12,%r2,xxx@toc@ha 2674 . std %r2,40(%r1) 2675 . ld %r11,xxx+0@toc@l(%r12) 2676 . ld %r2,xxx+8@toc@l(%r12) 2677 . mtctr %r11 2678 . ld %r11,xxx+16@toc@l(%r12) 2679 . bctr 2680 2681 ppc_stub_long_branch and ppc_stub_plt_branch may also have additional 2682 code to adjust the value and save r2 to support multiple toc sections. 2683 A ppc_stub_long_branch with an r2 offset looks like: 2684 . std %r2,40(%r1) 2685 . addis %r2,%r2,off@ha 2686 . addi %r2,%r2,off@l 2687 . b dest 2688 2689 A ppc_stub_plt_branch with an r2 offset looks like: 2690 . std %r2,40(%r1) 2691 . addis %r12,%r2,xxx@toc@ha 2692 . ld %r11,xxx@toc@l(%r12) 2693 . addis %r2,%r2,off@ha 2694 . addi %r2,%r2,off@l 2695 . mtctr %r11 2696 . bctr 2697 */ 2698 2699 enum ppc_stub_type { 2700 ppc_stub_none, 2701 ppc_stub_long_branch, 2702 ppc_stub_long_branch_r2off, 2703 ppc_stub_plt_branch, 2704 ppc_stub_plt_branch_r2off, 2705 ppc_stub_plt_call 2706 }; 2707 2708 struct ppc_stub_hash_entry { 2709 2710 /* Base hash table entry structure. */ 2711 struct bfd_hash_entry root; 2712 2713 enum ppc_stub_type stub_type; 2714 2715 /* The stub section. */ 2716 asection *stub_sec; 2717 2718 /* Offset within stub_sec of the beginning of this stub. */ 2719 bfd_vma stub_offset; 2720 2721 /* Given the symbol's value and its section we can determine its final 2722 value when building the stubs (so the stub knows where to jump. */ 2723 bfd_vma target_value; 2724 asection *target_section; 2725 2726 /* The symbol table entry, if any, that this was derived from. */ 2727 struct ppc_link_hash_entry *h; 2728 2729 /* And the reloc addend that this was derived from. */ 2730 bfd_vma addend; 2731 2732 /* Where this stub is being called from, or, in the case of combined 2733 stub sections, the first input section in the group. */ 2734 asection *id_sec; 2735 }; 2736 2737 struct ppc_branch_hash_entry { 2738 2739 /* Base hash table entry structure. */ 2740 struct bfd_hash_entry root; 2741 2742 /* Offset within .branch_lt. */ 2743 unsigned int offset; 2744 2745 /* Generation marker. */ 2746 unsigned int iter; 2747 }; 2748 2749 struct ppc_link_hash_entry 2750 { 2751 struct elf_link_hash_entry elf; 2752 2753 /* A pointer to the most recently used stub hash entry against this 2754 symbol. */ 2755 struct ppc_stub_hash_entry *stub_cache; 2756 2757 /* Track dynamic relocs copied for this symbol. */ 2758 struct ppc_dyn_relocs *dyn_relocs; 2759 2760 /* Link between function code and descriptor symbols. */ 2761 struct elf_link_hash_entry *oh; 2762 2763 /* Flag function code and descriptor symbols. */ 2764 unsigned int is_func:1; 2765 unsigned int is_func_descriptor:1; 2766 unsigned int is_entry:1; 2767 2768 /* Whether global opd sym has been adjusted or not. */ 2769 unsigned int adjust_done:1; 2770 2771 /* Contexts in which symbol is used in the GOT (or TOC). 2772 TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the 2773 corresponding relocs are encountered during check_relocs. 2774 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to 2775 indicate the corresponding GOT entry type is not needed. 2776 tls_optimize may also set TLS_TPRELGD when a GD reloc turns into 2777 a TPREL one. We use a separate flag rather than setting TPREL 2778 just for convenience in distinguishing the two cases. */ 2779 #define TLS_GD 1 /* GD reloc. */ 2780 #define TLS_LD 2 /* LD reloc. */ 2781 #define TLS_TPREL 4 /* TPREL reloc, => IE. */ 2782 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ 2783 #define TLS_TLS 16 /* Any TLS reloc. */ 2784 #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */ 2785 #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */ 2786 char tls_mask; 2787 }; 2788 2789 /* ppc64 ELF linker hash table. */ 2790 2791 struct ppc_link_hash_table 2792 { 2793 struct elf_link_hash_table elf; 2794 2795 /* The stub hash table. */ 2796 struct bfd_hash_table stub_hash_table; 2797 2798 /* Another hash table for plt_branch stubs. */ 2799 struct bfd_hash_table branch_hash_table; 2800 2801 /* Linker stub bfd. */ 2802 bfd *stub_bfd; 2803 2804 /* Linker call-backs. */ 2805 asection * (*add_stub_section) (const char *, asection *); 2806 void (*layout_sections_again) (void); 2807 2808 /* Array to keep track of which stub sections have been created, and 2809 information on stub grouping. */ 2810 struct map_stub { 2811 /* This is the section to which stubs in the group will be attached. */ 2812 asection *link_sec; 2813 /* The stub section. */ 2814 asection *stub_sec; 2815 /* Along with elf_gp, specifies the TOC pointer used in this group. */ 2816 bfd_vma toc_off; 2817 } *stub_group; 2818 2819 /* Support for multiple toc sections. */ 2820 unsigned int no_multi_toc; 2821 unsigned int multi_toc_needed; 2822 2823 /* Temp used when calculating TOC pointers. */ 2824 bfd_vma toc_curr; 2825 2826 /* Highest input section id. */ 2827 int top_id; 2828 2829 /* Highest output section index. */ 2830 int top_index; 2831 2832 /* List of input sections for each output section. */ 2833 asection **input_list; 2834 2835 /* Short-cuts to get to dynamic linker sections. */ 2836 asection *got; 2837 asection *plt; 2838 asection *relplt; 2839 asection *dynbss; 2840 asection *relbss; 2841 asection *glink; 2842 asection *sfpr; 2843 asection *brlt; 2844 asection *relbrlt; 2845 2846 /* Shortcut to .__tls_get_addr. */ 2847 struct elf_link_hash_entry *tls_get_addr; 2848 2849 /* Statistics. */ 2850 unsigned long stub_count[ppc_stub_plt_call]; 2851 2852 /* Set if we should emit symbols for stubs. */ 2853 unsigned int emit_stub_syms; 2854 2855 /* Set on error. */ 2856 unsigned int stub_error; 2857 2858 /* Flag set when small branches are detected. Used to 2859 select suitable defaults for the stub group size. */ 2860 unsigned int has_14bit_branch; 2861 2862 /* Set if we detect a reference undefined weak symbol. */ 2863 unsigned int have_undefweak; 2864 2865 /* Incremented every time we size stubs. */ 2866 unsigned int stub_iteration; 2867 2868 /* Small local sym to section mapping cache. */ 2869 struct sym_sec_cache sym_sec; 2870 }; 2871 2872 /* Get the ppc64 ELF linker hash table from a link_info structure. */ 2873 2874 #define ppc_hash_table(p) \ 2875 ((struct ppc_link_hash_table *) ((p)->hash)) 2876 2877 #define ppc_stub_hash_lookup(table, string, create, copy) \ 2878 ((struct ppc_stub_hash_entry *) \ 2879 bfd_hash_lookup ((table), (string), (create), (copy))) 2880 2881 #define ppc_branch_hash_lookup(table, string, create, copy) \ 2882 ((struct ppc_branch_hash_entry *) \ 2883 bfd_hash_lookup ((table), (string), (create), (copy))) 2884 2885 /* Create an entry in the stub hash table. */ 2886 2887 static struct bfd_hash_entry * 2888 stub_hash_newfunc (struct bfd_hash_entry *entry, 2889 struct bfd_hash_table *table, 2890 const char *string) 2891 { 2892 /* Allocate the structure if it has not already been allocated by a 2893 subclass. */ 2894 if (entry == NULL) 2895 { 2896 entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); 2897 if (entry == NULL) 2898 return entry; 2899 } 2900 2901 /* Call the allocation method of the superclass. */ 2902 entry = bfd_hash_newfunc (entry, table, string); 2903 if (entry != NULL) 2904 { 2905 struct ppc_stub_hash_entry *eh; 2906 2907 /* Initialize the local fields. */ 2908 eh = (struct ppc_stub_hash_entry *) entry; 2909 eh->stub_type = ppc_stub_none; 2910 eh->stub_sec = NULL; 2911 eh->stub_offset = 0; 2912 eh->target_value = 0; 2913 eh->target_section = NULL; 2914 eh->h = NULL; 2915 eh->id_sec = NULL; 2916 } 2917 2918 return entry; 2919 } 2920 2921 /* Create an entry in the branch hash table. */ 2922 2923 static struct bfd_hash_entry * 2924 branch_hash_newfunc (struct bfd_hash_entry *entry, 2925 struct bfd_hash_table *table, 2926 const char *string) 2927 { 2928 /* Allocate the structure if it has not already been allocated by a 2929 subclass. */ 2930 if (entry == NULL) 2931 { 2932 entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); 2933 if (entry == NULL) 2934 return entry; 2935 } 2936 2937 /* Call the allocation method of the superclass. */ 2938 entry = bfd_hash_newfunc (entry, table, string); 2939 if (entry != NULL) 2940 { 2941 struct ppc_branch_hash_entry *eh; 2942 2943 /* Initialize the local fields. */ 2944 eh = (struct ppc_branch_hash_entry *) entry; 2945 eh->offset = 0; 2946 eh->iter = 0; 2947 } 2948 2949 return entry; 2950 } 2951 2952 /* Create an entry in a ppc64 ELF linker hash table. */ 2953 2954 static struct bfd_hash_entry * 2955 link_hash_newfunc (struct bfd_hash_entry *entry, 2956 struct bfd_hash_table *table, 2957 const char *string) 2958 { 2959 /* Allocate the structure if it has not already been allocated by a 2960 subclass. */ 2961 if (entry == NULL) 2962 { 2963 entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); 2964 if (entry == NULL) 2965 return entry; 2966 } 2967 2968 /* Call the allocation method of the superclass. */ 2969 entry = _bfd_elf_link_hash_newfunc (entry, table, string); 2970 if (entry != NULL) 2971 { 2972 struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; 2973 2974 eh->stub_cache = NULL; 2975 eh->dyn_relocs = NULL; 2976 eh->oh = NULL; 2977 eh->is_func = 0; 2978 eh->is_func_descriptor = 0; 2979 eh->is_entry = 0; 2980 eh->adjust_done = 0; 2981 eh->tls_mask = 0; 2982 } 2983 2984 return entry; 2985 } 2986 2987 /* Create a ppc64 ELF linker hash table. */ 2988 2989 static struct bfd_link_hash_table * 2990 ppc64_elf_link_hash_table_create (bfd *abfd) 2991 { 2992 struct ppc_link_hash_table *htab; 2993 bfd_size_type amt = sizeof (struct ppc_link_hash_table); 2994 2995 htab = bfd_zmalloc (amt); 2996 if (htab == NULL) 2997 return NULL; 2998 2999 if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc)) 3000 { 3001 free (htab); 3002 return NULL; 3003 } 3004 3005 /* Init the stub hash table too. */ 3006 if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc)) 3007 return NULL; 3008 3009 /* And the branch hash table. */ 3010 if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc)) 3011 return NULL; 3012 3013 /* Initializing two fields of the union is just cosmetic. We really 3014 only care about glist, but when compiled on a 32-bit host the 3015 bfd_vma fields are larger. Setting the bfd_vma to zero makes 3016 debugger inspection of these fields look nicer. */ 3017 htab->elf.init_refcount.refcount = 0; 3018 htab->elf.init_refcount.glist = NULL; 3019 htab->elf.init_offset.offset = 0; 3020 htab->elf.init_offset.glist = NULL; 3021 3022 return &htab->elf.root; 3023 } 3024 3025 /* Free the derived linker hash table. */ 3026 3027 static void 3028 ppc64_elf_link_hash_table_free (struct bfd_link_hash_table *hash) 3029 { 3030 struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash; 3031 3032 bfd_hash_table_free (&ret->stub_hash_table); 3033 bfd_hash_table_free (&ret->branch_hash_table); 3034 _bfd_generic_link_hash_table_free (hash); 3035 } 3036 3037 /* Satisfy the ELF linker by filling in some fields in our fake bfd. */ 3038 3039 void 3040 ppc64_elf_init_stub_bfd (bfd *abfd, struct bfd_link_info *info) 3041 { 3042 struct ppc_link_hash_table *htab; 3043 3044 elf_elfheader (abfd)->e_ident[EI_CLASS] = ELFCLASS64; 3045 3046 /* Always hook our dynamic sections into the first bfd, which is the 3047 linker created stub bfd. This ensures that the GOT header is at 3048 the start of the output TOC section. */ 3049 htab = ppc_hash_table (info); 3050 htab->stub_bfd = abfd; 3051 htab->elf.dynobj = abfd; 3052 } 3053 3054 /* Build a name for an entry in the stub hash table. */ 3055 3056 static char * 3057 ppc_stub_name (const asection *input_section, 3058 const asection *sym_sec, 3059 const struct ppc_link_hash_entry *h, 3060 const Elf_Internal_Rela *rel) 3061 { 3062 char *stub_name; 3063 bfd_size_type len; 3064 3065 /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 3066 offsets from a sym as a branch target? In fact, we could 3067 probably assume the addend is always zero. */ 3068 BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); 3069 3070 if (h) 3071 { 3072 len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; 3073 stub_name = bfd_malloc (len); 3074 if (stub_name != NULL) 3075 { 3076 sprintf (stub_name, "%08x.%s+%x", 3077 input_section->id & 0xffffffff, 3078 h->elf.root.root.string, 3079 (int) rel->r_addend & 0xffffffff); 3080 } 3081 } 3082 else 3083 { 3084 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; 3085 stub_name = bfd_malloc (len); 3086 if (stub_name != NULL) 3087 { 3088 sprintf (stub_name, "%08x.%x:%x+%x", 3089 input_section->id & 0xffffffff, 3090 sym_sec->id & 0xffffffff, 3091 (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, 3092 (int) rel->r_addend & 0xffffffff); 3093 } 3094 } 3095 return stub_name; 3096 } 3097 3098 /* Look up an entry in the stub hash. Stub entries are cached because 3099 creating the stub name takes a bit of time. */ 3100 3101 static struct ppc_stub_hash_entry * 3102 ppc_get_stub_entry (const asection *input_section, 3103 const asection *sym_sec, 3104 struct elf_link_hash_entry *hash, 3105 const Elf_Internal_Rela *rel, 3106 struct ppc_link_hash_table *htab) 3107 { 3108 struct ppc_stub_hash_entry *stub_entry; 3109 struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash; 3110 const asection *id_sec; 3111 3112 /* If this input section is part of a group of sections sharing one 3113 stub section, then use the id of the first section in the group. 3114 Stub names need to include a section id, as there may well be 3115 more than one stub used to reach say, printf, and we need to 3116 distinguish between them. */ 3117 id_sec = htab->stub_group[input_section->id].link_sec; 3118 3119 if (h != NULL && h->stub_cache != NULL 3120 && h->stub_cache->h == h 3121 && h->stub_cache->id_sec == id_sec) 3122 { 3123 stub_entry = h->stub_cache; 3124 } 3125 else 3126 { 3127 char *stub_name; 3128 3129 stub_name = ppc_stub_name (id_sec, sym_sec, h, rel); 3130 if (stub_name == NULL) 3131 return NULL; 3132 3133 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, 3134 stub_name, FALSE, FALSE); 3135 if (h != NULL) 3136 h->stub_cache = stub_entry; 3137 3138 free (stub_name); 3139 } 3140 3141 return stub_entry; 3142 } 3143 3144 /* Add a new stub entry to the stub hash. Not all fields of the new 3145 stub entry are initialised. */ 3146 3147 static struct ppc_stub_hash_entry * 3148 ppc_add_stub (const char *stub_name, 3149 asection *section, 3150 struct ppc_link_hash_table *htab) 3151 { 3152 asection *link_sec; 3153 asection *stub_sec; 3154 struct ppc_stub_hash_entry *stub_entry; 3155 3156 link_sec = htab->stub_group[section->id].link_sec; 3157 stub_sec = htab->stub_group[section->id].stub_sec; 3158 if (stub_sec == NULL) 3159 { 3160 stub_sec = htab->stub_group[link_sec->id].stub_sec; 3161 if (stub_sec == NULL) 3162 { 3163 size_t namelen; 3164 bfd_size_type len; 3165 char *s_name; 3166 3167 namelen = strlen (link_sec->name); 3168 len = namelen + sizeof (STUB_SUFFIX); 3169 s_name = bfd_alloc (htab->stub_bfd, len); 3170 if (s_name == NULL) 3171 return NULL; 3172 3173 memcpy (s_name, link_sec->name, namelen); 3174 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); 3175 stub_sec = (*htab->add_stub_section) (s_name, link_sec); 3176 if (stub_sec == NULL) 3177 return NULL; 3178 htab->stub_group[link_sec->id].stub_sec = stub_sec; 3179 } 3180 htab->stub_group[section->id].stub_sec = stub_sec; 3181 } 3182 3183 /* Enter this entry into the linker stub hash table. */ 3184 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, 3185 TRUE, FALSE); 3186 if (stub_entry == NULL) 3187 { 3188 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), 3189 bfd_archive_filename (section->owner), 3190 stub_name); 3191 return NULL; 3192 } 3193 3194 stub_entry->stub_sec = stub_sec; 3195 stub_entry->stub_offset = 0; 3196 stub_entry->id_sec = link_sec; 3197 return stub_entry; 3198 } 3199 3200 /* Create sections for linker generated code. */ 3201 3202 static bfd_boolean 3203 create_linkage_sections (bfd *dynobj, struct bfd_link_info *info) 3204 { 3205 struct ppc_link_hash_table *htab; 3206 flagword flags; 3207 3208 htab = ppc_hash_table (info); 3209 3210 /* Create .sfpr for code to save and restore fp regs. */ 3211 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY 3212 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3213 htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr"); 3214 if (htab->sfpr == NULL 3215 || ! bfd_set_section_flags (dynobj, htab->sfpr, flags) 3216 || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2)) 3217 return FALSE; 3218 3219 /* Create .glink for lazy dynamic linking support. */ 3220 htab->glink = bfd_make_section_anyway (dynobj, ".glink"); 3221 if (htab->glink == NULL 3222 || ! bfd_set_section_flags (dynobj, htab->glink, flags) 3223 || ! bfd_set_section_alignment (dynobj, htab->glink, 2)) 3224 return FALSE; 3225 3226 /* Create .branch_lt for plt_branch stubs. */ 3227 flags = (SEC_ALLOC | SEC_LOAD 3228 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3229 htab->brlt = bfd_make_section_anyway (dynobj, ".branch_lt"); 3230 if (htab->brlt == NULL 3231 || ! bfd_set_section_flags (dynobj, htab->brlt, flags) 3232 || ! bfd_set_section_alignment (dynobj, htab->brlt, 3)) 3233 return FALSE; 3234 3235 if (info->shared) 3236 { 3237 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY 3238 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); 3239 htab->relbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt"); 3240 if (!htab->relbrlt 3241 || ! bfd_set_section_flags (dynobj, htab->relbrlt, flags) 3242 || ! bfd_set_section_alignment (dynobj, htab->relbrlt, 3)) 3243 return FALSE; 3244 } 3245 return TRUE; 3246 } 3247 3248 /* Create .got and .rela.got sections in ABFD, and .got in dynobj if 3249 not already done. */ 3250 3251 static bfd_boolean 3252 create_got_section (bfd *abfd, struct bfd_link_info *info) 3253 { 3254 asection *got, *relgot; 3255 flagword flags; 3256 struct ppc_link_hash_table *htab = ppc_hash_table (info); 3257 3258 if (!htab->got) 3259 { 3260 if (! _bfd_elf_create_got_section (htab->elf.dynobj, info)) 3261 return FALSE; 3262 3263 htab->got = bfd_get_section_by_name (htab->elf.dynobj, ".got"); 3264 if (!htab->got) 3265 abort (); 3266 } 3267 3268 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY 3269 | SEC_LINKER_CREATED); 3270 3271 got = bfd_make_section (abfd, ".got"); 3272 if (!got 3273 || !bfd_set_section_flags (abfd, got, flags) 3274 || !bfd_set_section_alignment (abfd, got, 3)) 3275 return FALSE; 3276 3277 relgot = bfd_make_section (abfd, ".rela.got"); 3278 if (!relgot 3279 || ! bfd_set_section_flags (abfd, relgot, flags | SEC_READONLY) 3280 || ! bfd_set_section_alignment (abfd, relgot, 3)) 3281 return FALSE; 3282 3283 ppc64_elf_tdata (abfd)->got = got; 3284 ppc64_elf_tdata (abfd)->relgot = relgot; 3285 return TRUE; 3286 } 3287 3288 /* Create the dynamic sections, and set up shortcuts. */ 3289 3290 static bfd_boolean 3291 ppc64_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) 3292 { 3293 struct ppc_link_hash_table *htab; 3294 3295 if (!_bfd_elf_create_dynamic_sections (dynobj, info)) 3296 return FALSE; 3297 3298 htab = ppc_hash_table (info); 3299 if (!htab->got) 3300 htab->got = bfd_get_section_by_name (dynobj, ".got"); 3301 htab->plt = bfd_get_section_by_name (dynobj, ".plt"); 3302 htab->relplt = bfd_get_section_by_name (dynobj, ".rela.plt"); 3303 htab->dynbss = bfd_get_section_by_name (dynobj, ".dynbss"); 3304 if (!info->shared) 3305 htab->relbss = bfd_get_section_by_name (dynobj, ".rela.bss"); 3306 3307 if (!htab->got || !htab->plt || !htab->relplt || !htab->dynbss 3308 || (!info->shared && !htab->relbss)) 3309 abort (); 3310 3311 return TRUE; 3312 } 3313 3314 /* Copy the extra info we tack onto an elf_link_hash_entry. */ 3315 3316 static void 3317 ppc64_elf_copy_indirect_symbol 3318 (const struct elf_backend_data *bed ATTRIBUTE_UNUSED, 3319 struct elf_link_hash_entry *dir, 3320 struct elf_link_hash_entry *ind) 3321 { 3322 struct ppc_link_hash_entry *edir, *eind; 3323 flagword mask; 3324 3325 edir = (struct ppc_link_hash_entry *) dir; 3326 eind = (struct ppc_link_hash_entry *) ind; 3327 3328 /* Copy over any dynamic relocs we may have on the indirect sym. */ 3329 if (eind->dyn_relocs != NULL) 3330 { 3331 if (edir->dyn_relocs != NULL) 3332 { 3333 struct ppc_dyn_relocs **pp; 3334 struct ppc_dyn_relocs *p; 3335 3336 if (eind->elf.root.type == bfd_link_hash_indirect) 3337 abort (); 3338 3339 /* Add reloc counts against the weak sym to the strong sym 3340 list. Merge any entries against the same section. */ 3341 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) 3342 { 3343 struct ppc_dyn_relocs *q; 3344 3345 for (q = edir->dyn_relocs; q != NULL; q = q->next) 3346 if (q->sec == p->sec) 3347 { 3348 q->pc_count += p->pc_count; 3349 q->count += p->count; 3350 *pp = p->next; 3351 break; 3352 } 3353 if (q == NULL) 3354 pp = &p->next; 3355 } 3356 *pp = edir->dyn_relocs; 3357 } 3358 3359 edir->dyn_relocs = eind->dyn_relocs; 3360 eind->dyn_relocs = NULL; 3361 } 3362 3363 edir->is_func |= eind->is_func; 3364 edir->is_func_descriptor |= eind->is_func_descriptor; 3365 edir->is_entry |= eind->is_entry; 3366 edir->tls_mask |= eind->tls_mask; 3367 3368 mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR 3369 | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF 3370 | ELF_LINK_HASH_NEEDS_PLT); 3371 /* If called to transfer flags for a weakdef during processing 3372 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. 3373 We clear it ourselves for ELIMINATE_COPY_RELOCS. */ 3374 if (ELIMINATE_COPY_RELOCS 3375 && eind->elf.root.type != bfd_link_hash_indirect 3376 && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) 3377 mask &= ~ELF_LINK_NON_GOT_REF; 3378 3379 edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask; 3380 3381 /* If we were called to copy over info for a weak sym, that's all. */ 3382 if (eind->elf.root.type != bfd_link_hash_indirect) 3383 return; 3384 3385 /* Copy over got entries that we may have already seen to the 3386 symbol which just became indirect. */ 3387 if (eind->elf.got.glist != NULL) 3388 { 3389 if (edir->elf.got.glist != NULL) 3390 { 3391 struct got_entry **entp; 3392 struct got_entry *ent; 3393 3394 for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; ) 3395 { 3396 struct got_entry *dent; 3397 3398 for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next) 3399 if (dent->addend == ent->addend 3400 && dent->owner == ent->owner 3401 && dent->tls_type == ent->tls_type) 3402 { 3403 dent->got.refcount += ent->got.refcount; 3404 *entp = ent->next; 3405 break; 3406 } 3407 if (dent == NULL) 3408 entp = &ent->next; 3409 } 3410 *entp = edir->elf.got.glist; 3411 } 3412 3413 edir->elf.got.glist = eind->elf.got.glist; 3414 eind->elf.got.glist = NULL; 3415 } 3416 3417 /* And plt entries. */ 3418 if (eind->elf.plt.plist != NULL) 3419 { 3420 if (edir->elf.plt.plist != NULL) 3421 { 3422 struct plt_entry **entp; 3423 struct plt_entry *ent; 3424 3425 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) 3426 { 3427 struct plt_entry *dent; 3428 3429 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) 3430 if (dent->addend == ent->addend) 3431 { 3432 dent->plt.refcount += ent->plt.refcount; 3433 *entp = ent->next; 3434 break; 3435 } 3436 if (dent == NULL) 3437 entp = &ent->next; 3438 } 3439 *entp = edir->elf.plt.plist; 3440 } 3441 3442 edir->elf.plt.plist = eind->elf.plt.plist; 3443 eind->elf.plt.plist = NULL; 3444 } 3445 3446 if (edir->elf.dynindx == -1) 3447 { 3448 edir->elf.dynindx = eind->elf.dynindx; 3449 edir->elf.dynstr_index = eind->elf.dynstr_index; 3450 eind->elf.dynindx = -1; 3451 eind->elf.dynstr_index = 0; 3452 } 3453 else 3454 BFD_ASSERT (eind->elf.dynindx == -1); 3455 } 3456 3457 /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and 3458 symbols undefined on the command-line. */ 3459 3460 bfd_boolean 3461 ppc64_elf_mark_entry_syms (struct bfd_link_info *info) 3462 { 3463 struct ppc_link_hash_table *htab; 3464 struct bfd_sym_chain *sym; 3465 3466 htab = ppc_hash_table (info); 3467 for (sym = info->gc_sym_list; sym; sym = sym->next) 3468 { 3469 struct elf_link_hash_entry *h; 3470 3471 h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE); 3472 if (h != NULL) 3473 ((struct ppc_link_hash_entry *) h)->is_entry = 1; 3474 } 3475 return TRUE; 3476 } 3477 3478 /* Hack symbols defined in .opd sections to be function type. */ 3479 3480 static bfd_boolean 3481 ppc64_elf_add_symbol_hook (bfd *ibfd ATTRIBUTE_UNUSED, 3482 struct bfd_link_info *info ATTRIBUTE_UNUSED, 3483 Elf_Internal_Sym *isym, 3484 const char **name ATTRIBUTE_UNUSED, 3485 flagword *flags ATTRIBUTE_UNUSED, 3486 asection **sec, 3487 bfd_vma *value ATTRIBUTE_UNUSED) 3488 { 3489 if (strcmp (bfd_get_section_name (ibfd, *sec), ".opd") == 0) 3490 isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC); 3491 return TRUE; 3492 } 3493 3494 static bfd_boolean 3495 update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, 3496 unsigned long r_symndx, bfd_vma r_addend, int tls_type) 3497 { 3498 struct got_entry **local_got_ents = elf_local_got_ents (abfd); 3499 char *local_got_tls_masks; 3500 3501 if (local_got_ents == NULL) 3502 { 3503 bfd_size_type size = symtab_hdr->sh_info; 3504 3505 size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks); 3506 local_got_ents = bfd_zalloc (abfd, size); 3507 if (local_got_ents == NULL) 3508 return FALSE; 3509 elf_local_got_ents (abfd) = local_got_ents; 3510 } 3511 3512 if ((tls_type & TLS_EXPLICIT) == 0) 3513 { 3514 struct got_entry *ent; 3515 3516 for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next) 3517 if (ent->addend == r_addend 3518 && ent->owner == abfd 3519 && ent->tls_type == tls_type) 3520 break; 3521 if (ent == NULL) 3522 { 3523 bfd_size_type amt = sizeof (*ent); 3524 ent = bfd_alloc (abfd, amt); 3525 if (ent == NULL) 3526 return FALSE; 3527 ent->next = local_got_ents[r_symndx]; 3528 ent->addend = r_addend; 3529 ent->owner = abfd; 3530 ent->tls_type = tls_type; 3531 ent->got.refcount = 0; 3532 local_got_ents[r_symndx] = ent; 3533 } 3534 ent->got.refcount += 1; 3535 } 3536 3537 local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info); 3538 local_got_tls_masks[r_symndx] |= tls_type; 3539 return TRUE; 3540 } 3541 3542 static bfd_boolean 3543 update_plt_info (bfd *abfd, struct ppc_link_hash_entry *eh, bfd_vma addend) 3544 { 3545 struct plt_entry *ent; 3546 3547 for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next) 3548 if (ent->addend == addend) 3549 break; 3550 if (ent == NULL) 3551 { 3552 bfd_size_type amt = sizeof (*ent); 3553 ent = bfd_alloc (abfd, amt); 3554 if (ent == NULL) 3555 return FALSE; 3556 ent->next = eh->elf.plt.plist; 3557 ent->addend = addend; 3558 ent->plt.refcount = 0; 3559 eh->elf.plt.plist = ent; 3560 } 3561 ent->plt.refcount += 1; 3562 eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; 3563 eh->is_func = 1; 3564 return TRUE; 3565 } 3566 3567 /* Find the function descriptor hash entry from the given function code 3568 hash entry FH. Link the entries via their OH fields. */ 3569 static struct ppc_link_hash_entry * 3570 get_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab) 3571 { 3572 struct ppc_link_hash_entry *fdh = (struct ppc_link_hash_entry *) fh->oh; 3573 3574 if (fdh == NULL) 3575 { 3576 const char *fd_name = fh->elf.root.root.string + 1; 3577 3578 fdh = (struct ppc_link_hash_entry *) 3579 elf_link_hash_lookup (&htab->elf, fd_name, FALSE, FALSE, FALSE); 3580 if (fdh != NULL) 3581 { 3582 fdh->is_func_descriptor = 1; 3583 fdh->oh = &fh->elf; 3584 fh->is_func = 1; 3585 fh->oh = &fdh->elf; 3586 } 3587 } 3588 3589 return fdh; 3590 } 3591 3592 /* Look through the relocs for a section during the first phase, and 3593 calculate needed space in the global offset table, procedure 3594 linkage table, and dynamic reloc sections. */ 3595 3596 static bfd_boolean 3597 ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, 3598 asection *sec, const Elf_Internal_Rela *relocs) 3599 { 3600 struct ppc_link_hash_table *htab; 3601 Elf_Internal_Shdr *symtab_hdr; 3602 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; 3603 const Elf_Internal_Rela *rel; 3604 const Elf_Internal_Rela *rel_end; 3605 asection *sreloc; 3606 asection **opd_sym_map; 3607 3608 if (info->relocatable) 3609 return TRUE; 3610 3611 /* Don't do anything special with non-loaded, non-alloced sections. 3612 In particular, any relocs in such sections should not affect GOT 3613 and PLT reference counting (ie. we don't allow them to create GOT 3614 or PLT entries), there's no possibility or desire to optimize TLS 3615 relocs, and there's not much point in propagating relocs to shared 3616 libs that the dynamic linker won't relocate. */ 3617 if ((sec->flags & SEC_ALLOC) == 0) 3618 return TRUE; 3619 3620 htab = ppc_hash_table (info); 3621 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 3622 3623 sym_hashes = elf_sym_hashes (abfd); 3624 sym_hashes_end = (sym_hashes 3625 + symtab_hdr->sh_size / sizeof (Elf64_External_Sym) 3626 - symtab_hdr->sh_info); 3627 3628 sreloc = NULL; 3629 opd_sym_map = NULL; 3630 if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0) 3631 { 3632 /* Garbage collection needs some extra help with .opd sections. 3633 We don't want to necessarily keep everything referenced by 3634 relocs in .opd, as that would keep all functions. Instead, 3635 if we reference an .opd symbol (a function descriptor), we 3636 want to keep the function code symbol's section. This is 3637 easy for global symbols, but for local syms we need to keep 3638 information about the associated function section. Later, if 3639 edit_opd deletes entries, we'll use this array to adjust 3640 local syms in .opd. */ 3641 union opd_info { 3642 asection *func_section; 3643 long entry_adjust; 3644 }; 3645 bfd_size_type amt; 3646 3647 amt = sec->_raw_size * sizeof (union opd_info) / 24; 3648 opd_sym_map = bfd_zalloc (abfd, amt); 3649 if (opd_sym_map == NULL) 3650 return FALSE; 3651 ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map; 3652 } 3653 3654 if (htab->sfpr == NULL 3655 && !create_linkage_sections (htab->elf.dynobj, info)) 3656 return FALSE; 3657 3658 rel_end = relocs + sec->reloc_count; 3659 for (rel = relocs; rel < rel_end; rel++) 3660 { 3661 unsigned long r_symndx; 3662 struct elf_link_hash_entry *h; 3663 enum elf_ppc64_reloc_type r_type; 3664 int tls_type = 0; 3665 3666 r_symndx = ELF64_R_SYM (rel->r_info); 3667 if (r_symndx < symtab_hdr->sh_info) 3668 h = NULL; 3669 else 3670 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 3671 3672 r_type = ELF64_R_TYPE (rel->r_info); 3673 switch (r_type) 3674 { 3675 case R_PPC64_GOT_TLSLD16: 3676 case R_PPC64_GOT_TLSLD16_LO: 3677 case R_PPC64_GOT_TLSLD16_HI: 3678 case R_PPC64_GOT_TLSLD16_HA: 3679 ppc64_tlsld_got (abfd)->refcount += 1; 3680 tls_type = TLS_TLS | TLS_LD; 3681 goto dogottls; 3682 3683 case R_PPC64_GOT_TLSGD16: 3684 case R_PPC64_GOT_TLSGD16_LO: 3685 case R_PPC64_GOT_TLSGD16_HI: 3686 case R_PPC64_GOT_TLSGD16_HA: 3687 tls_type = TLS_TLS | TLS_GD; 3688 goto dogottls; 3689 3690 case R_PPC64_GOT_TPREL16_DS: 3691 case R_PPC64_GOT_TPREL16_LO_DS: 3692 case R_PPC64_GOT_TPREL16_HI: 3693 case R_PPC64_GOT_TPREL16_HA: 3694 if (info->shared) 3695 info->flags |= DF_STATIC_TLS; 3696 tls_type = TLS_TLS | TLS_TPREL; 3697 goto dogottls; 3698 3699 case R_PPC64_GOT_DTPREL16_DS: 3700 case R_PPC64_GOT_DTPREL16_LO_DS: 3701 case R_PPC64_GOT_DTPREL16_HI: 3702 case R_PPC64_GOT_DTPREL16_HA: 3703 tls_type = TLS_TLS | TLS_DTPREL; 3704 dogottls: 3705 sec->has_tls_reloc = 1; 3706 /* Fall thru */ 3707 3708 case R_PPC64_GOT16: 3709 case R_PPC64_GOT16_DS: 3710 case R_PPC64_GOT16_HA: 3711 case R_PPC64_GOT16_HI: 3712 case R_PPC64_GOT16_LO: 3713 case R_PPC64_GOT16_LO_DS: 3714 /* This symbol requires a global offset table entry. */ 3715 sec->has_gp_reloc = 1; 3716 if (ppc64_elf_tdata (abfd)->got == NULL 3717 && !create_got_section (abfd, info)) 3718 return FALSE; 3719 3720 if (h != NULL) 3721 { 3722 struct ppc_link_hash_entry *eh; 3723 struct got_entry *ent; 3724 3725 eh = (struct ppc_link_hash_entry *) h; 3726 for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next) 3727 if (ent->addend == rel->r_addend 3728 && ent->owner == abfd 3729 && ent->tls_type == tls_type) 3730 break; 3731 if (ent == NULL) 3732 { 3733 bfd_size_type amt = sizeof (*ent); 3734 ent = bfd_alloc (abfd, amt); 3735 if (ent == NULL) 3736 return FALSE; 3737 ent->next = eh->elf.got.glist; 3738 ent->addend = rel->r_addend; 3739 ent->owner = abfd; 3740 ent->tls_type = tls_type; 3741 ent->got.refcount = 0; 3742 eh->elf.got.glist = ent; 3743 } 3744 ent->got.refcount += 1; 3745 eh->tls_mask |= tls_type; 3746 } 3747 else 3748 /* This is a global offset table entry for a local symbol. */ 3749 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, 3750 rel->r_addend, tls_type)) 3751 return FALSE; 3752 break; 3753 3754 case R_PPC64_PLT16_HA: 3755 case R_PPC64_PLT16_HI: 3756 case R_PPC64_PLT16_LO: 3757 case R_PPC64_PLT32: 3758 case R_PPC64_PLT64: 3759 /* This symbol requires a procedure linkage table entry. We 3760 actually build the entry in adjust_dynamic_symbol, 3761 because this might be a case of linking PIC code without 3762 linking in any dynamic objects, in which case we don't 3763 need to generate a procedure linkage table after all. */ 3764 if (h == NULL) 3765 { 3766 /* It does not make sense to have a procedure linkage 3767 table entry for a local symbol. */ 3768 bfd_set_error (bfd_error_bad_value); 3769 return FALSE; 3770 } 3771 else 3772 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h, 3773 rel->r_addend)) 3774 return FALSE; 3775 break; 3776 3777 /* The following relocations don't need to propagate the 3778 relocation if linking a shared object since they are 3779 section relative. */ 3780 case R_PPC64_SECTOFF: 3781 case R_PPC64_SECTOFF_LO: 3782 case R_PPC64_SECTOFF_HI: 3783 case R_PPC64_SECTOFF_HA: 3784 case R_PPC64_SECTOFF_DS: 3785 case R_PPC64_SECTOFF_LO_DS: 3786 case R_PPC64_DTPREL16: 3787 case R_PPC64_DTPREL16_LO: 3788 case R_PPC64_DTPREL16_HI: 3789 case R_PPC64_DTPREL16_HA: 3790 case R_PPC64_DTPREL16_DS: 3791 case R_PPC64_DTPREL16_LO_DS: 3792 case R_PPC64_DTPREL16_HIGHER: 3793 case R_PPC64_DTPREL16_HIGHERA: 3794 case R_PPC64_DTPREL16_HIGHEST: 3795 case R_PPC64_DTPREL16_HIGHESTA: 3796 break; 3797 3798 /* Nor do these. */ 3799 case R_PPC64_TOC16: 3800 case R_PPC64_TOC16_LO: 3801 case R_PPC64_TOC16_HI: 3802 case R_PPC64_TOC16_HA: 3803 case R_PPC64_TOC16_DS: 3804 case R_PPC64_TOC16_LO_DS: 3805 sec->has_gp_reloc = 1; 3806 break; 3807 3808 /* This relocation describes the C++ object vtable hierarchy. 3809 Reconstruct it for later use during GC. */ 3810 case R_PPC64_GNU_VTINHERIT: 3811 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) 3812 return FALSE; 3813 break; 3814 3815 /* This relocation describes which C++ vtable entries are actually 3816 used. Record for later use during GC. */ 3817 case R_PPC64_GNU_VTENTRY: 3818 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) 3819 return FALSE; 3820 break; 3821 3822 case R_PPC64_REL14: 3823 case R_PPC64_REL14_BRTAKEN: 3824 case R_PPC64_REL14_BRNTAKEN: 3825 htab->has_14bit_branch = 1; 3826 /* Fall through. */ 3827 3828 case R_PPC64_REL24: 3829 if (h != NULL 3830 && h->root.root.string[0] == '.' 3831 && h->root.root.string[1] != 0) 3832 { 3833 /* We may need a .plt entry if the function this reloc 3834 refers to is in a shared lib. */ 3835 if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h, 3836 rel->r_addend)) 3837 return FALSE; 3838 if (h == htab->tls_get_addr) 3839 sec->has_tls_reloc = 1; 3840 else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15) 3841 == 0) 3842 && (h->root.root.string[15] == 0 3843 || h->root.root.string[15] == '@')) 3844 { 3845 htab->tls_get_addr = h; 3846 sec->has_tls_reloc = 1; 3847 } 3848 } 3849 break; 3850 3851 case R_PPC64_TPREL64: 3852 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL; 3853 if (info->shared) 3854 info->flags |= DF_STATIC_TLS; 3855 goto dotlstoc; 3856 3857 case R_PPC64_DTPMOD64: 3858 if (rel + 1 < rel_end 3859 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) 3860 && rel[1].r_offset == rel->r_offset + 8) 3861 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD; 3862 else 3863 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD; 3864 goto dotlstoc; 3865 3866 case R_PPC64_DTPREL64: 3867 tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL; 3868 if (rel != relocs 3869 && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64) 3870 && rel[-1].r_offset == rel->r_offset - 8) 3871 /* This is the second reloc of a dtpmod, dtprel pair. 3872 Don't mark with TLS_DTPREL. */ 3873 goto dodyn; 3874 3875 dotlstoc: 3876 sec->has_tls_reloc = 1; 3877 if (h != NULL) 3878 { 3879 struct ppc_link_hash_entry *eh; 3880 eh = (struct ppc_link_hash_entry *) h; 3881 eh->tls_mask |= tls_type; 3882 } 3883 else 3884 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, 3885 rel->r_addend, tls_type)) 3886 return FALSE; 3887 3888 if (ppc64_elf_section_data (sec)->t_symndx == NULL) 3889 { 3890 /* One extra to simplify get_tls_mask. */ 3891 bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1; 3892 ppc64_elf_section_data (sec)->t_symndx = bfd_zalloc (abfd, amt); 3893 if (ppc64_elf_section_data (sec)->t_symndx == NULL) 3894 return FALSE; 3895 } 3896 BFD_ASSERT (rel->r_offset % 8 == 0); 3897 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx; 3898 3899 /* Mark the second slot of a GD or LD entry. 3900 -1 to indicate GD and -2 to indicate LD. */ 3901 if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD)) 3902 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1; 3903 else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD)) 3904 ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2; 3905 goto dodyn; 3906 3907 case R_PPC64_TPREL16: 3908 case R_PPC64_TPREL16_LO: 3909 case R_PPC64_TPREL16_HI: 3910 case R_PPC64_TPREL16_HA: 3911 case R_PPC64_TPREL16_DS: 3912 case R_PPC64_TPREL16_LO_DS: 3913 case R_PPC64_TPREL16_HIGHER: 3914 case R_PPC64_TPREL16_HIGHERA: 3915 case R_PPC64_TPREL16_HIGHEST: 3916 case R_PPC64_TPREL16_HIGHESTA: 3917 if (info->shared) 3918 { 3919 info->flags |= DF_STATIC_TLS; 3920 goto dodyn; 3921 } 3922 break; 3923 3924 case R_PPC64_ADDR64: 3925 if (opd_sym_map != NULL 3926 && h != NULL 3927 && h->root.root.string[0] == '.' 3928 && h->root.root.string[1] != 0) 3929 get_fdh ((struct ppc_link_hash_entry *) h, htab); 3930 3931 if (opd_sym_map != NULL 3932 && h == NULL 3933 && rel + 1 < rel_end 3934 && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC) 3935 { 3936 asection *s; 3937 3938 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec, 3939 r_symndx); 3940 if (s == NULL) 3941 return FALSE; 3942 else if (s != sec) 3943 opd_sym_map[rel->r_offset / 24] = s; 3944 } 3945 /* Fall through. */ 3946 3947 case R_PPC64_REL30: 3948 case R_PPC64_REL32: 3949 case R_PPC64_REL64: 3950 case R_PPC64_ADDR14: 3951 case R_PPC64_ADDR14_BRNTAKEN: 3952 case R_PPC64_ADDR14_BRTAKEN: 3953 case R_PPC64_ADDR16: 3954 case R_PPC64_ADDR16_DS: 3955 case R_PPC64_ADDR16_HA: 3956 case R_PPC64_ADDR16_HI: 3957 case R_PPC64_ADDR16_HIGHER: 3958 case R_PPC64_ADDR16_HIGHERA: 3959 case R_PPC64_ADDR16_HIGHEST: 3960 case R_PPC64_ADDR16_HIGHESTA: 3961 case R_PPC64_ADDR16_LO: 3962 case R_PPC64_ADDR16_LO_DS: 3963 case R_PPC64_ADDR24: 3964 case R_PPC64_ADDR32: 3965 case R_PPC64_UADDR16: 3966 case R_PPC64_UADDR32: 3967 case R_PPC64_UADDR64: 3968 case R_PPC64_TOC: 3969 if (h != NULL && !info->shared) 3970 /* We may need a copy reloc. */ 3971 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; 3972 3973 /* Don't propagate .opd relocs. */ 3974 if (NO_OPD_RELOCS && opd_sym_map != NULL) 3975 break; 3976 3977 /* If we are creating a shared library, and this is a reloc 3978 against a global symbol, or a non PC relative reloc 3979 against a local symbol, then we need to copy the reloc 3980 into the shared library. However, if we are linking with 3981 -Bsymbolic, we do not need to copy a reloc against a 3982 global symbol which is defined in an object we are 3983 including in the link (i.e., DEF_REGULAR is set). At 3984 this point we have not seen all the input files, so it is 3985 possible that DEF_REGULAR is not set now but will be set 3986 later (it is never cleared). In case of a weak definition, 3987 DEF_REGULAR may be cleared later by a strong definition in 3988 a shared library. We account for that possibility below by 3989 storing information in the dyn_relocs field of the hash 3990 table entry. A similar situation occurs when creating 3991 shared libraries and symbol visibility changes render the 3992 symbol local. 3993 3994 If on the other hand, we are creating an executable, we 3995 may need to keep relocations for symbols satisfied by a 3996 dynamic library if we manage to avoid copy relocs for the 3997 symbol. */ 3998 dodyn: 3999 if ((info->shared 4000 && (MUST_BE_DYN_RELOC (r_type) 4001 || (h != NULL 4002 && (! info->symbolic 4003 || h->root.type == bfd_link_hash_defweak 4004 || (h->elf_link_hash_flags 4005 & ELF_LINK_HASH_DEF_REGULAR) == 0)))) 4006 || (ELIMINATE_COPY_RELOCS 4007 && !info->shared 4008 && h != NULL 4009 && (h->root.type == bfd_link_hash_defweak 4010 || (h->elf_link_hash_flags 4011 & ELF_LINK_HASH_DEF_REGULAR) == 0))) 4012 { 4013 struct ppc_dyn_relocs *p; 4014 struct ppc_dyn_relocs **head; 4015 4016 /* We must copy these reloc types into the output file. 4017 Create a reloc section in dynobj and make room for 4018 this reloc. */ 4019 if (sreloc == NULL) 4020 { 4021 const char *name; 4022 bfd *dynobj; 4023 4024 name = (bfd_elf_string_from_elf_section 4025 (abfd, 4026 elf_elfheader (abfd)->e_shstrndx, 4027 elf_section_data (sec)->rel_hdr.sh_name)); 4028 if (name == NULL) 4029 return FALSE; 4030 4031 if (strncmp (name, ".rela", 5) != 0 4032 || strcmp (bfd_get_section_name (abfd, sec), 4033 name + 5) != 0) 4034 { 4035 (*_bfd_error_handler) 4036 (_("%s: bad relocation section name `%s\'"), 4037 bfd_archive_filename (abfd), name); 4038 bfd_set_error (bfd_error_bad_value); 4039 } 4040 4041 dynobj = htab->elf.dynobj; 4042 sreloc = bfd_get_section_by_name (dynobj, name); 4043 if (sreloc == NULL) 4044 { 4045 flagword flags; 4046 4047 sreloc = bfd_make_section (dynobj, name); 4048 flags = (SEC_HAS_CONTENTS | SEC_READONLY 4049 | SEC_IN_MEMORY | SEC_LINKER_CREATED); 4050 if ((sec->flags & SEC_ALLOC) != 0) 4051 flags |= SEC_ALLOC | SEC_LOAD; 4052 if (sreloc == NULL 4053 || ! bfd_set_section_flags (dynobj, sreloc, flags) 4054 || ! bfd_set_section_alignment (dynobj, sreloc, 3)) 4055 return FALSE; 4056 } 4057 elf_section_data (sec)->sreloc = sreloc; 4058 } 4059 4060 /* If this is a global symbol, we count the number of 4061 relocations we need for this symbol. */ 4062 if (h != NULL) 4063 { 4064 head = &((struct ppc_link_hash_entry *) h)->dyn_relocs; 4065 } 4066 else 4067 { 4068 /* Track dynamic relocs needed for local syms too. 4069 We really need local syms available to do this 4070 easily. Oh well. */ 4071 4072 asection *s; 4073 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, 4074 sec, r_symndx); 4075 if (s == NULL) 4076 return FALSE; 4077 4078 head = ((struct ppc_dyn_relocs **) 4079 &elf_section_data (s)->local_dynrel); 4080 } 4081 4082 p = *head; 4083 if (p == NULL || p->sec != sec) 4084 { 4085 p = bfd_alloc (htab->elf.dynobj, sizeof *p); 4086 if (p == NULL) 4087 return FALSE; 4088 p->next = *head; 4089 *head = p; 4090 p->sec = sec; 4091 p->count = 0; 4092 p->pc_count = 0; 4093 } 4094 4095 p->count += 1; 4096 if (!MUST_BE_DYN_RELOC (r_type)) 4097 p->pc_count += 1; 4098 } 4099 break; 4100 4101 default: 4102 break; 4103 } 4104 } 4105 4106 return TRUE; 4107 } 4108 4109 /* Return the section that should be marked against GC for a given 4110 relocation. */ 4111 4112 static asection * 4113 ppc64_elf_gc_mark_hook (asection *sec, 4114 struct bfd_link_info *info ATTRIBUTE_UNUSED, 4115 Elf_Internal_Rela *rel, 4116 struct elf_link_hash_entry *h, 4117 Elf_Internal_Sym *sym) 4118 { 4119 asection *rsec = NULL; 4120 4121 if (h != NULL) 4122 { 4123 enum elf_ppc64_reloc_type r_type; 4124 struct ppc_link_hash_entry *fdh; 4125 4126 r_type = ELF64_R_TYPE (rel->r_info); 4127 switch (r_type) 4128 { 4129 case R_PPC64_GNU_VTINHERIT: 4130 case R_PPC64_GNU_VTENTRY: 4131 break; 4132 4133 default: 4134 switch (h->root.type) 4135 { 4136 case bfd_link_hash_defined: 4137 case bfd_link_hash_defweak: 4138 fdh = (struct ppc_link_hash_entry *) h; 4139 4140 /* Function descriptor syms cause the associated 4141 function code sym section to be marked. */ 4142 if (fdh->is_func_descriptor) 4143 rsec = fdh->oh->root.u.def.section; 4144 4145 /* Function entry syms return NULL if they are in .opd 4146 and are not ._start (or others undefined on the ld 4147 command line). Thus we avoid marking all function 4148 sections, as all functions are referenced in .opd. */ 4149 else if ((fdh->oh != NULL 4150 && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry) 4151 || ppc64_elf_section_data (sec)->opd.func_sec == NULL) 4152 rsec = h->root.u.def.section; 4153 break; 4154 4155 case bfd_link_hash_common: 4156 rsec = h->root.u.c.p->section; 4157 break; 4158 4159 default: 4160 break; 4161 } 4162 } 4163 } 4164 else 4165 { 4166 asection **opd_sym_section; 4167 4168 rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); 4169 opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec; 4170 if (opd_sym_section != NULL) 4171 rsec = opd_sym_section[sym->st_value / 24]; 4172 else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL) 4173 rsec = NULL; 4174 } 4175 4176 return rsec; 4177 } 4178 4179 /* Update the .got, .plt. and dynamic reloc reference counts for the 4180 section being removed. */ 4181 4182 static bfd_boolean 4183 ppc64_elf_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, 4184 asection *sec, const Elf_Internal_Rela *relocs) 4185 { 4186 struct ppc_link_hash_table *htab; 4187 Elf_Internal_Shdr *symtab_hdr; 4188 struct elf_link_hash_entry **sym_hashes; 4189 struct got_entry **local_got_ents; 4190 const Elf_Internal_Rela *rel, *relend; 4191 4192 if ((sec->flags & SEC_ALLOC) == 0) 4193 return TRUE; 4194 4195 elf_section_data (sec)->local_dynrel = NULL; 4196 4197 htab = ppc_hash_table (info); 4198 symtab_hdr = &elf_tdata (abfd)->symtab_hdr; 4199 sym_hashes = elf_sym_hashes (abfd); 4200 local_got_ents = elf_local_got_ents (abfd); 4201 4202 relend = relocs + sec->reloc_count; 4203 for (rel = relocs; rel < relend; rel++) 4204 { 4205 unsigned long r_symndx; 4206 enum elf_ppc64_reloc_type r_type; 4207 struct elf_link_hash_entry *h = NULL; 4208 char tls_type = 0; 4209 4210 r_symndx = ELF64_R_SYM (rel->r_info); 4211 r_type = ELF64_R_TYPE (rel->r_info); 4212 if (r_symndx >= symtab_hdr->sh_info) 4213 { 4214 struct ppc_link_hash_entry *eh; 4215 struct ppc_dyn_relocs **pp; 4216 struct ppc_dyn_relocs *p; 4217 4218 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4219 eh = (struct ppc_link_hash_entry *) h; 4220 4221 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) 4222 if (p->sec == sec) 4223 { 4224 /* Everything must go for SEC. */ 4225 *pp = p->next; 4226 break; 4227 } 4228 } 4229 4230 switch (r_type) 4231 { 4232 case R_PPC64_GOT_TLSLD16: 4233 case R_PPC64_GOT_TLSLD16_LO: 4234 case R_PPC64_GOT_TLSLD16_HI: 4235 case R_PPC64_GOT_TLSLD16_HA: 4236 ppc64_tlsld_got (abfd)->refcount -= 1; 4237 tls_type = TLS_TLS | TLS_LD; 4238 goto dogot; 4239 4240 case R_PPC64_GOT_TLSGD16: 4241 case R_PPC64_GOT_TLSGD16_LO: 4242 case R_PPC64_GOT_TLSGD16_HI: 4243 case R_PPC64_GOT_TLSGD16_HA: 4244 tls_type = TLS_TLS | TLS_GD; 4245 goto dogot; 4246 4247 case R_PPC64_GOT_TPREL16_DS: 4248 case R_PPC64_GOT_TPREL16_LO_DS: 4249 case R_PPC64_GOT_TPREL16_HI: 4250 case R_PPC64_GOT_TPREL16_HA: 4251 tls_type = TLS_TLS | TLS_TPREL; 4252 goto dogot; 4253 4254 case R_PPC64_GOT_DTPREL16_DS: 4255 case R_PPC64_GOT_DTPREL16_LO_DS: 4256 case R_PPC64_GOT_DTPREL16_HI: 4257 case R_PPC64_GOT_DTPREL16_HA: 4258 tls_type = TLS_TLS | TLS_DTPREL; 4259 goto dogot; 4260 4261 case R_PPC64_GOT16: 4262 case R_PPC64_GOT16_DS: 4263 case R_PPC64_GOT16_HA: 4264 case R_PPC64_GOT16_HI: 4265 case R_PPC64_GOT16_LO: 4266 case R_PPC64_GOT16_LO_DS: 4267 dogot: 4268 { 4269 struct got_entry *ent; 4270 4271 if (h != NULL) 4272 ent = h->got.glist; 4273 else 4274 ent = local_got_ents[r_symndx]; 4275 4276 for (; ent != NULL; ent = ent->next) 4277 if (ent->addend == rel->r_addend 4278 && ent->owner == abfd 4279 && ent->tls_type == tls_type) 4280 break; 4281 if (ent == NULL) 4282 abort (); 4283 if (ent->got.refcount > 0) 4284 ent->got.refcount -= 1; 4285 } 4286 break; 4287 4288 case R_PPC64_PLT16_HA: 4289 case R_PPC64_PLT16_HI: 4290 case R_PPC64_PLT16_LO: 4291 case R_PPC64_PLT32: 4292 case R_PPC64_PLT64: 4293 case R_PPC64_REL14: 4294 case R_PPC64_REL14_BRNTAKEN: 4295 case R_PPC64_REL14_BRTAKEN: 4296 case R_PPC64_REL24: 4297 if (h != NULL) 4298 { 4299 struct plt_entry *ent; 4300 4301 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 4302 if (ent->addend == rel->r_addend) 4303 break; 4304 if (ent == NULL) 4305 abort (); 4306 if (ent->plt.refcount > 0) 4307 ent->plt.refcount -= 1; 4308 } 4309 break; 4310 4311 default: 4312 break; 4313 } 4314 } 4315 return TRUE; 4316 } 4317 4318 /* Called via elf_link_hash_traverse to transfer dynamic linking 4319 information on function code symbol entries to their corresponding 4320 function descriptor symbol entries. */ 4321 static bfd_boolean 4322 func_desc_adjust (struct elf_link_hash_entry *h, void *inf) 4323 { 4324 struct bfd_link_info *info; 4325 struct ppc_link_hash_table *htab; 4326 struct plt_entry *ent; 4327 struct ppc_link_hash_entry *fh; 4328 struct ppc_link_hash_entry *fdh; 4329 bfd_boolean force_local; 4330 4331 fh = (struct ppc_link_hash_entry *) h; 4332 if (fh->elf.root.type == bfd_link_hash_indirect) 4333 return TRUE; 4334 4335 if (fh->elf.root.type == bfd_link_hash_warning) 4336 fh = (struct ppc_link_hash_entry *) fh->elf.root.u.i.link; 4337 4338 info = inf; 4339 htab = ppc_hash_table (info); 4340 4341 /* If this is a function code symbol, transfer dynamic linking 4342 information to the function descriptor symbol. */ 4343 if (!fh->is_func) 4344 return TRUE; 4345 4346 if (fh->elf.root.type == bfd_link_hash_undefweak 4347 && (fh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR)) 4348 htab->have_undefweak = TRUE; 4349 4350 for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next) 4351 if (ent->plt.refcount > 0) 4352 break; 4353 if (ent == NULL 4354 || fh->elf.root.root.string[0] != '.' 4355 || fh->elf.root.root.string[1] == '\0') 4356 return TRUE; 4357 4358 /* Find the corresponding function descriptor symbol. Create it 4359 as undefined if necessary. */ 4360 4361 fdh = get_fdh (fh, htab); 4362 if (fdh != NULL) 4363 while (fdh->elf.root.type == bfd_link_hash_indirect 4364 || fdh->elf.root.type == bfd_link_hash_warning) 4365 fdh = (struct ppc_link_hash_entry *) fdh->elf.root.u.i.link; 4366 4367 if (fdh == NULL 4368 && info->shared 4369 && (fh->elf.root.type == bfd_link_hash_undefined 4370 || fh->elf.root.type == bfd_link_hash_undefweak)) 4371 { 4372 bfd *abfd; 4373 asymbol *newsym; 4374 struct bfd_link_hash_entry *bh; 4375 4376 abfd = fh->elf.root.u.undef.abfd; 4377 newsym = bfd_make_empty_symbol (abfd); 4378 newsym->name = fh->elf.root.root.string + 1; 4379 newsym->section = bfd_und_section_ptr; 4380 newsym->value = 0; 4381 newsym->flags = BSF_OBJECT; 4382 if (fh->elf.root.type == bfd_link_hash_undefweak) 4383 newsym->flags |= BSF_WEAK; 4384 4385 bh = &fdh->elf.root; 4386 if ( !(_bfd_generic_link_add_one_symbol 4387 (info, abfd, newsym->name, newsym->flags, 4388 newsym->section, newsym->value, NULL, FALSE, FALSE, &bh))) 4389 { 4390 return FALSE; 4391 } 4392 fdh = (struct ppc_link_hash_entry *) bh; 4393 fdh->elf.elf_link_hash_flags &= ~ELF_LINK_NON_ELF; 4394 fdh->elf.size = 24; 4395 fdh->elf.type = STT_OBJECT; 4396 } 4397 4398 if (fdh != NULL 4399 && (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 4400 && (info->shared 4401 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 4402 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 4403 || (fdh->elf.root.type == bfd_link_hash_undefweak 4404 && ELF_ST_VISIBILITY (fdh->elf.other) == STV_DEFAULT))) 4405 { 4406 if (fdh->elf.dynindx == -1) 4407 if (! bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) 4408 return FALSE; 4409 fdh->elf.elf_link_hash_flags 4410 |= (fh->elf.elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR 4411 | ELF_LINK_HASH_REF_DYNAMIC 4412 | ELF_LINK_HASH_REF_REGULAR_NONWEAK 4413 | ELF_LINK_NON_GOT_REF)); 4414 if (ELF_ST_VISIBILITY (fh->elf.other) == STV_DEFAULT) 4415 { 4416 fdh->elf.plt.plist = fh->elf.plt.plist; 4417 fdh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; 4418 } 4419 fdh->is_func_descriptor = 1; 4420 fdh->oh = &fh->elf; 4421 fh->oh = &fdh->elf; 4422 } 4423 4424 /* Now that the info is on the function descriptor, clear the 4425 function code sym info. Any function code syms for which we 4426 don't have a definition in a regular file, we force local. 4427 This prevents a shared library from exporting syms that have 4428 been imported from another library. Function code syms that 4429 are really in the library we must leave global to prevent the 4430 linker dragging in a definition from a static library. */ 4431 force_local 4432 = (info->shared 4433 && ((fh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 4434 || fdh == NULL 4435 || (fdh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 4436 || (fdh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)); 4437 _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); 4438 4439 return TRUE; 4440 } 4441 4442 #define MIN_SAVE_FPR 14 4443 #define MAX_SAVE_FPR 31 4444 4445 /* Called near the start of bfd_elf_size_dynamic_sections. We use 4446 this hook to a) provide some gcc support functions, and b) transfer 4447 dynamic linking information gathered so far on function code symbol 4448 entries, to their corresponding function descriptor symbol entries. */ 4449 static bfd_boolean 4450 ppc64_elf_func_desc_adjust (bfd *obfd ATTRIBUTE_UNUSED, 4451 struct bfd_link_info *info) 4452 { 4453 struct ppc_link_hash_table *htab; 4454 unsigned int lowest_savef = MAX_SAVE_FPR + 2; 4455 unsigned int lowest_restf = MAX_SAVE_FPR + 2; 4456 unsigned int i; 4457 struct elf_link_hash_entry *h; 4458 bfd_byte *p; 4459 char sym[10]; 4460 4461 htab = ppc_hash_table (info); 4462 4463 if (htab->sfpr == NULL) 4464 /* We don't have any relocs. */ 4465 return TRUE; 4466 4467 /* First provide any missing ._savef* and ._restf* functions. */ 4468 memcpy (sym, "._savef14", 10); 4469 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) 4470 { 4471 sym[7] = i / 10 + '0'; 4472 sym[8] = i % 10 + '0'; 4473 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE); 4474 if (h != NULL 4475 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) 4476 { 4477 if (lowest_savef > i) 4478 lowest_savef = i; 4479 h->root.type = bfd_link_hash_defined; 4480 h->root.u.def.section = htab->sfpr; 4481 h->root.u.def.value = (i - lowest_savef) * 4; 4482 h->type = STT_FUNC; 4483 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; 4484 _bfd_elf_link_hash_hide_symbol (info, h, TRUE); 4485 } 4486 } 4487 4488 memcpy (sym, "._restf14", 10); 4489 for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) 4490 { 4491 sym[7] = i / 10 + '0'; 4492 sym[8] = i % 10 + '0'; 4493 h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE); 4494 if (h != NULL 4495 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) 4496 { 4497 if (lowest_restf > i) 4498 lowest_restf = i; 4499 h->root.type = bfd_link_hash_defined; 4500 h->root.u.def.section = htab->sfpr; 4501 h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 4502 + (i - lowest_restf) * 4); 4503 h->type = STT_FUNC; 4504 h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; 4505 _bfd_elf_link_hash_hide_symbol (info, h, TRUE); 4506 } 4507 } 4508 4509 elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); 4510 4511 htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 4512 + (MAX_SAVE_FPR + 2 - lowest_restf) * 4); 4513 4514 if (htab->sfpr->_raw_size == 0) 4515 { 4516 if (!htab->have_undefweak) 4517 { 4518 _bfd_strip_section_from_output (info, htab->sfpr); 4519 return TRUE; 4520 } 4521 4522 htab->sfpr->_raw_size = 4; 4523 } 4524 4525 p = bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size); 4526 if (p == NULL) 4527 return FALSE; 4528 htab->sfpr->contents = p; 4529 4530 for (i = lowest_savef; i <= MAX_SAVE_FPR; i++) 4531 { 4532 unsigned int fpr = i << 21; 4533 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; 4534 bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p); 4535 p += 4; 4536 } 4537 if (lowest_savef <= MAX_SAVE_FPR) 4538 { 4539 bfd_put_32 (htab->elf.dynobj, BLR, p); 4540 p += 4; 4541 } 4542 4543 for (i = lowest_restf; i <= MAX_SAVE_FPR; i++) 4544 { 4545 unsigned int fpr = i << 21; 4546 unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; 4547 bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p); 4548 p += 4; 4549 } 4550 if (lowest_restf <= MAX_SAVE_FPR 4551 || htab->sfpr->_raw_size == 4) 4552 { 4553 bfd_put_32 (htab->elf.dynobj, BLR, p); 4554 } 4555 4556 return TRUE; 4557 } 4558 4559 /* Adjust a symbol defined by a dynamic object and referenced by a 4560 regular object. The current definition is in some section of the 4561 dynamic object, but we're not including those sections. We have to 4562 change the definition to something the rest of the link can 4563 understand. */ 4564 4565 static bfd_boolean 4566 ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info, 4567 struct elf_link_hash_entry *h) 4568 { 4569 struct ppc_link_hash_table *htab; 4570 asection *s; 4571 unsigned int power_of_two; 4572 4573 htab = ppc_hash_table (info); 4574 4575 /* Deal with function syms. */ 4576 if (h->type == STT_FUNC 4577 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) 4578 { 4579 /* Clear procedure linkage table information for any symbol that 4580 won't need a .plt entry. */ 4581 struct plt_entry *ent; 4582 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 4583 if (ent->plt.refcount > 0) 4584 break; 4585 if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor 4586 || ent == NULL 4587 || SYMBOL_CALLS_LOCAL (info, h) 4588 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 4589 && h->root.type == bfd_link_hash_undefweak)) 4590 { 4591 h->plt.plist = NULL; 4592 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; 4593 } 4594 } 4595 else 4596 h->plt.plist = NULL; 4597 4598 /* If this is a weak symbol, and there is a real definition, the 4599 processor independent code will have arranged for us to see the 4600 real definition first, and we can just use the same value. */ 4601 if (h->weakdef != NULL) 4602 { 4603 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined 4604 || h->weakdef->root.type == bfd_link_hash_defweak); 4605 h->root.u.def.section = h->weakdef->root.u.def.section; 4606 h->root.u.def.value = h->weakdef->root.u.def.value; 4607 if (ELIMINATE_COPY_RELOCS) 4608 h->elf_link_hash_flags 4609 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) 4610 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); 4611 return TRUE; 4612 } 4613 4614 /* If we are creating a shared library, we must presume that the 4615 only references to the symbol are via the global offset table. 4616 For such cases we need not do anything here; the relocations will 4617 be handled correctly by relocate_section. */ 4618 if (info->shared) 4619 return TRUE; 4620 4621 /* If there are no references to this symbol that do not use the 4622 GOT, we don't need to generate a copy reloc. */ 4623 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) 4624 return TRUE; 4625 4626 if (ELIMINATE_COPY_RELOCS) 4627 { 4628 struct ppc_link_hash_entry * eh; 4629 struct ppc_dyn_relocs *p; 4630 4631 eh = (struct ppc_link_hash_entry *) h; 4632 for (p = eh->dyn_relocs; p != NULL; p = p->next) 4633 { 4634 s = p->sec->output_section; 4635 if (s != NULL && (s->flags & SEC_READONLY) != 0) 4636 break; 4637 } 4638 4639 /* If we didn't find any dynamic relocs in read-only sections, then 4640 we'll be keeping the dynamic relocs and avoiding the copy reloc. */ 4641 if (p == NULL) 4642 { 4643 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; 4644 return TRUE; 4645 } 4646 } 4647 4648 if (h->plt.plist != NULL) 4649 { 4650 /* We should never get here, but unfortunately there are versions 4651 of gcc out there that improperly (for this ABI) put initialized 4652 function pointers, vtable refs and suchlike in read-only 4653 sections. Allow them to proceed, but warn that this might 4654 break at runtime. */ 4655 (*_bfd_error_handler) 4656 (_("copy reloc against `%s' requires lazy plt linking; " 4657 "avoid setting LD_BIND_NOW=1 or upgrade gcc"), 4658 h->root.root.string); 4659 } 4660 4661 /* This is a reference to a symbol defined by a dynamic object which 4662 is not a function. */ 4663 4664 /* We must allocate the symbol in our .dynbss section, which will 4665 become part of the .bss section of the executable. There will be 4666 an entry for this symbol in the .dynsym section. The dynamic 4667 object will contain position independent code, so all references 4668 from the dynamic object to this symbol will go through the global 4669 offset table. The dynamic linker will use the .dynsym entry to 4670 determine the address it must put in the global offset table, so 4671 both the dynamic object and the regular object will refer to the 4672 same memory location for the variable. */ 4673 4674 /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker 4675 to copy the initial value out of the dynamic object and into the 4676 runtime process image. We need to remember the offset into the 4677 .rela.bss section we are going to use. */ 4678 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) 4679 { 4680 htab->relbss->_raw_size += sizeof (Elf64_External_Rela); 4681 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; 4682 } 4683 4684 /* We need to figure out the alignment required for this symbol. I 4685 have no idea how ELF linkers handle this. */ 4686 power_of_two = bfd_log2 (h->size); 4687 if (power_of_two > 4) 4688 power_of_two = 4; 4689 4690 /* Apply the required alignment. */ 4691 s = htab->dynbss; 4692 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); 4693 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) 4694 { 4695 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) 4696 return FALSE; 4697 } 4698 4699 /* Define the symbol as being at this point in the section. */ 4700 h->root.u.def.section = s; 4701 h->root.u.def.value = s->_raw_size; 4702 4703 /* Increment the section size to make room for the symbol. */ 4704 s->_raw_size += h->size; 4705 4706 return TRUE; 4707 } 4708 4709 /* If given a function descriptor symbol, hide both the function code 4710 sym and the descriptor. */ 4711 static void 4712 ppc64_elf_hide_symbol (struct bfd_link_info *info, 4713 struct elf_link_hash_entry *h, 4714 bfd_boolean force_local) 4715 { 4716 _bfd_elf_link_hash_hide_symbol (info, h, force_local); 4717 4718 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor) 4719 { 4720 struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh; 4721 4722 if (fh == NULL) 4723 { 4724 const char *p, *q; 4725 struct ppc_link_hash_table *htab; 4726 char save; 4727 4728 /* We aren't supposed to use alloca in BFD because on 4729 systems which do not have alloca the version in libiberty 4730 calls xmalloc, which might cause the program to crash 4731 when it runs out of memory. This function doesn't have a 4732 return status, so there's no way to gracefully return an 4733 error. So cheat. We know that string[-1] can be safely 4734 dereferenced; It's either a string in an ELF string 4735 table, or allocated in an objalloc structure. */ 4736 4737 p = h->root.root.string - 1; 4738 save = *p; 4739 *(char *) p = '.'; 4740 htab = ppc_hash_table (info); 4741 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); 4742 *(char *) p = save; 4743 4744 /* Unfortunately, if it so happens that the string we were 4745 looking for was allocated immediately before this string, 4746 then we overwrote the string terminator. That's the only 4747 reason the lookup should fail. */ 4748 if (fh == NULL) 4749 { 4750 q = h->root.root.string + strlen (h->root.root.string); 4751 while (q >= h->root.root.string && *q == *p) 4752 --q, --p; 4753 if (q < h->root.root.string && *p == '.') 4754 fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); 4755 } 4756 if (fh != NULL) 4757 { 4758 ((struct ppc_link_hash_entry *) h)->oh = fh; 4759 ((struct ppc_link_hash_entry *) fh)->oh = h; 4760 } 4761 } 4762 if (fh != NULL) 4763 _bfd_elf_link_hash_hide_symbol (info, fh, force_local); 4764 } 4765 } 4766 4767 static bfd_boolean 4768 get_sym_h (struct elf_link_hash_entry **hp, Elf_Internal_Sym **symp, 4769 asection **symsecp, char **tls_maskp, Elf_Internal_Sym **locsymsp, 4770 unsigned long r_symndx, bfd *ibfd) 4771 { 4772 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 4773 4774 if (r_symndx >= symtab_hdr->sh_info) 4775 { 4776 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); 4777 struct elf_link_hash_entry *h; 4778 4779 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; 4780 while (h->root.type == bfd_link_hash_indirect 4781 || h->root.type == bfd_link_hash_warning) 4782 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4783 4784 if (hp != NULL) 4785 *hp = h; 4786 4787 if (symp != NULL) 4788 *symp = NULL; 4789 4790 if (symsecp != NULL) 4791 { 4792 asection *symsec = NULL; 4793 if (h->root.type == bfd_link_hash_defined 4794 || h->root.type == bfd_link_hash_defweak) 4795 symsec = h->root.u.def.section; 4796 *symsecp = symsec; 4797 } 4798 4799 if (tls_maskp != NULL) 4800 { 4801 struct ppc_link_hash_entry *eh; 4802 4803 eh = (struct ppc_link_hash_entry *) h; 4804 *tls_maskp = &eh->tls_mask; 4805 } 4806 } 4807 else 4808 { 4809 Elf_Internal_Sym *sym; 4810 Elf_Internal_Sym *locsyms = *locsymsp; 4811 4812 if (locsyms == NULL) 4813 { 4814 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; 4815 if (locsyms == NULL) 4816 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, 4817 symtab_hdr->sh_info, 4818 0, NULL, NULL, NULL); 4819 if (locsyms == NULL) 4820 return FALSE; 4821 *locsymsp = locsyms; 4822 } 4823 sym = locsyms + r_symndx; 4824 4825 if (hp != NULL) 4826 *hp = NULL; 4827 4828 if (symp != NULL) 4829 *symp = sym; 4830 4831 if (symsecp != NULL) 4832 { 4833 asection *symsec = NULL; 4834 if ((sym->st_shndx != SHN_UNDEF 4835 && sym->st_shndx < SHN_LORESERVE) 4836 || sym->st_shndx > SHN_HIRESERVE) 4837 symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx); 4838 *symsecp = symsec; 4839 } 4840 4841 if (tls_maskp != NULL) 4842 { 4843 struct got_entry **lgot_ents; 4844 char *tls_mask; 4845 4846 tls_mask = NULL; 4847 lgot_ents = elf_local_got_ents (ibfd); 4848 if (lgot_ents != NULL) 4849 { 4850 char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info); 4851 tls_mask = &lgot_masks[r_symndx]; 4852 } 4853 *tls_maskp = tls_mask; 4854 } 4855 } 4856 return TRUE; 4857 } 4858 4859 /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on 4860 error, 2 on a toc GD type suitable for optimization, 3 on a toc LD 4861 type suitable for optimization, and 1 otherwise. */ 4862 4863 static int 4864 get_tls_mask (char **tls_maskp, unsigned long *toc_symndx, 4865 Elf_Internal_Sym **locsymsp, 4866 const Elf_Internal_Rela *rel, bfd *ibfd) 4867 { 4868 unsigned long r_symndx; 4869 int next_r; 4870 struct elf_link_hash_entry *h; 4871 Elf_Internal_Sym *sym; 4872 asection *sec; 4873 bfd_vma off; 4874 4875 r_symndx = ELF64_R_SYM (rel->r_info); 4876 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) 4877 return 0; 4878 4879 if ((*tls_maskp != NULL && **tls_maskp != 0) 4880 || sec == NULL 4881 || ppc64_elf_section_data (sec)->t_symndx == NULL) 4882 return 1; 4883 4884 /* Look inside a TOC section too. */ 4885 if (h != NULL) 4886 { 4887 BFD_ASSERT (h->root.type == bfd_link_hash_defined); 4888 off = h->root.u.def.value; 4889 } 4890 else 4891 off = sym->st_value; 4892 off += rel->r_addend; 4893 BFD_ASSERT (off % 8 == 0); 4894 r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8]; 4895 next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1]; 4896 if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) 4897 return 0; 4898 if (toc_symndx != NULL) 4899 *toc_symndx = r_symndx; 4900 if ((h == NULL 4901 || ((h->root.type == bfd_link_hash_defined 4902 || h->root.type == bfd_link_hash_defweak) 4903 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))) 4904 && (next_r == -1 || next_r == -2)) 4905 return 1 - next_r; 4906 return 1; 4907 } 4908 4909 /* Adjust all global syms defined in opd sections. In gcc generated 4910 code these will already have been done, but I suppose we have to 4911 cater for all sorts of hand written assembly. */ 4912 4913 static bfd_boolean 4914 adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) 4915 { 4916 struct ppc_link_hash_entry *eh; 4917 asection *sym_sec; 4918 long *opd_adjust; 4919 4920 if (h->root.type == bfd_link_hash_indirect) 4921 return TRUE; 4922 4923 if (h->root.type == bfd_link_hash_warning) 4924 h = (struct elf_link_hash_entry *) h->root.u.i.link; 4925 4926 if (h->root.type != bfd_link_hash_defined 4927 && h->root.type != bfd_link_hash_defweak) 4928 return TRUE; 4929 4930 eh = (struct ppc_link_hash_entry *) h; 4931 if (eh->adjust_done) 4932 return TRUE; 4933 4934 sym_sec = eh->elf.root.u.def.section; 4935 if (sym_sec != NULL 4936 && elf_section_data (sym_sec) != NULL 4937 && (opd_adjust = ppc64_elf_section_data (sym_sec)->opd.adjust) != NULL) 4938 { 4939 eh->elf.root.u.def.value += opd_adjust[eh->elf.root.u.def.value / 24]; 4940 eh->adjust_done = 1; 4941 } 4942 return TRUE; 4943 } 4944 4945 /* Remove unused Official Procedure Descriptor entries. Currently we 4946 only remove those associated with functions in discarded link-once 4947 sections, or weakly defined functions that have been overridden. It 4948 would be possible to remove many more entries for statically linked 4949 applications. */ 4950 4951 bfd_boolean 4952 ppc64_elf_edit_opd (bfd *obfd, struct bfd_link_info *info) 4953 { 4954 bfd *ibfd; 4955 bfd_boolean some_edited = FALSE; 4956 4957 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 4958 { 4959 asection *sec; 4960 Elf_Internal_Rela *relstart, *rel, *relend; 4961 Elf_Internal_Shdr *symtab_hdr; 4962 Elf_Internal_Sym *local_syms; 4963 struct elf_link_hash_entry **sym_hashes; 4964 bfd_vma offset; 4965 bfd_size_type amt; 4966 long *adjust; 4967 bfd_boolean need_edit; 4968 4969 sec = bfd_get_section_by_name (ibfd, ".opd"); 4970 if (sec == NULL) 4971 continue; 4972 4973 amt = sec->_raw_size * sizeof (long) / 24; 4974 adjust = ppc64_elf_section_data (sec)->opd.adjust; 4975 if (adjust == NULL) 4976 { 4977 /* Must be a ld -r link. ie. check_relocs hasn't been 4978 called. */ 4979 adjust = bfd_zalloc (obfd, amt); 4980 ppc64_elf_section_data (sec)->opd.adjust = adjust; 4981 } 4982 memset (adjust, 0, amt); 4983 4984 if (sec->output_section == bfd_abs_section_ptr) 4985 continue; 4986 4987 /* Look through the section relocs. */ 4988 if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) 4989 continue; 4990 4991 local_syms = NULL; 4992 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 4993 sym_hashes = elf_sym_hashes (ibfd); 4994 4995 /* Read the relocations. */ 4996 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 4997 info->keep_memory); 4998 if (relstart == NULL) 4999 return FALSE; 5000 5001 /* First run through the relocs to check they are sane, and to 5002 determine whether we need to edit this opd section. */ 5003 need_edit = FALSE; 5004 offset = 0; 5005 relend = relstart + sec->reloc_count; 5006 for (rel = relstart; rel < relend; ) 5007 { 5008 enum elf_ppc64_reloc_type r_type; 5009 unsigned long r_symndx; 5010 asection *sym_sec; 5011 struct elf_link_hash_entry *h; 5012 Elf_Internal_Sym *sym; 5013 5014 /* .opd contains a regular array of 24 byte entries. We're 5015 only interested in the reloc pointing to a function entry 5016 point. */ 5017 if (rel->r_offset != offset 5018 || rel + 1 >= relend 5019 || (rel + 1)->r_offset != offset + 8) 5020 { 5021 /* If someone messes with .opd alignment then after a 5022 "ld -r" we might have padding in the middle of .opd. 5023 Also, there's nothing to prevent someone putting 5024 something silly in .opd with the assembler. No .opd 5025 optimization for them! */ 5026 (*_bfd_error_handler) 5027 (_("%s: .opd is not a regular array of opd entries"), 5028 bfd_archive_filename (ibfd)); 5029 need_edit = FALSE; 5030 break; 5031 } 5032 5033 if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64 5034 || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC) 5035 { 5036 (*_bfd_error_handler) 5037 (_("%s: unexpected reloc type %u in .opd section"), 5038 bfd_archive_filename (ibfd), r_type); 5039 need_edit = FALSE; 5040 break; 5041 } 5042 5043 r_symndx = ELF64_R_SYM (rel->r_info); 5044 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 5045 r_symndx, ibfd)) 5046 goto error_ret; 5047 5048 if (sym_sec == NULL || sym_sec->owner == NULL) 5049 { 5050 const char *sym_name; 5051 if (h != NULL) 5052 sym_name = h->root.root.string; 5053 else 5054 sym_name = bfd_elf_local_sym_name (ibfd, sym); 5055 5056 (*_bfd_error_handler) 5057 (_("%s: undefined sym `%s' in .opd section"), 5058 bfd_archive_filename (ibfd), 5059 sym_name); 5060 need_edit = FALSE; 5061 break; 5062 } 5063 5064 /* opd entries are always for functions defined in the 5065 current input bfd. If the symbol isn't defined in the 5066 input bfd, then we won't be using the function in this 5067 bfd; It must be defined in a linkonce section in another 5068 bfd, or is weak. It's also possible that we are 5069 discarding the function due to a linker script /DISCARD/, 5070 which we test for via the output_section. */ 5071 if (sym_sec->owner != ibfd 5072 || sym_sec->output_section == bfd_abs_section_ptr) 5073 need_edit = TRUE; 5074 5075 offset += 24; 5076 rel += 2; 5077 /* Allow for the possibility of a reloc on the third word. */ 5078 if (rel < relend 5079 && rel->r_offset == offset - 8) 5080 rel += 1; 5081 } 5082 5083 if (need_edit) 5084 { 5085 Elf_Internal_Rela *write_rel; 5086 bfd_byte *rptr, *wptr; 5087 bfd_boolean skip; 5088 5089 /* This seems a waste of time as input .opd sections are all 5090 zeros as generated by gcc, but I suppose there's no reason 5091 this will always be so. We might start putting something in 5092 the third word of .opd entries. */ 5093 if ((sec->flags & SEC_IN_MEMORY) == 0) 5094 { 5095 bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size); 5096 if (loc == NULL 5097 || !bfd_get_section_contents (ibfd, sec, loc, 0, 5098 sec->_raw_size)) 5099 { 5100 error_ret: 5101 if (local_syms != NULL 5102 && symtab_hdr->contents != (unsigned char *) local_syms) 5103 free (local_syms); 5104 if (elf_section_data (sec)->relocs != relstart) 5105 free (relstart); 5106 return FALSE; 5107 } 5108 sec->contents = loc; 5109 sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); 5110 } 5111 5112 elf_section_data (sec)->relocs = relstart; 5113 5114 wptr = sec->contents; 5115 rptr = sec->contents; 5116 write_rel = relstart; 5117 skip = FALSE; 5118 offset = 0; 5119 for (rel = relstart; rel < relend; rel++) 5120 { 5121 unsigned long r_symndx; 5122 asection *sym_sec; 5123 struct elf_link_hash_entry *h; 5124 Elf_Internal_Sym *sym; 5125 5126 r_symndx = ELF64_R_SYM (rel->r_info); 5127 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 5128 r_symndx, ibfd)) 5129 goto error_ret; 5130 5131 if (rel->r_offset == offset) 5132 { 5133 struct ppc_link_hash_entry *fdh = NULL; 5134 if (h != NULL) 5135 fdh = get_fdh ((struct ppc_link_hash_entry *) h, 5136 ppc_hash_table (info)); 5137 5138 skip = (sym_sec->owner != ibfd 5139 || sym_sec->output_section == bfd_abs_section_ptr); 5140 if (skip) 5141 { 5142 if (h != NULL && sym_sec->owner == ibfd) 5143 { 5144 /* Arrange for the function descriptor sym 5145 to be dropped. */ 5146 fdh->elf.root.u.def.value = 0; 5147 fdh->elf.root.u.def.section = sym_sec; 5148 } 5149 } 5150 else 5151 { 5152 /* We'll be keeping this opd entry. */ 5153 5154 if (h != NULL) 5155 { 5156 /* Redefine the function descriptor symbol to 5157 this location in the opd section. It is 5158 necessary to update the value here rather 5159 than using an array of adjustments as we do 5160 for local symbols, because various places 5161 in the generic ELF code use the value 5162 stored in u.def.value. */ 5163 fdh->elf.root.u.def.value = wptr - sec->contents; 5164 fdh->adjust_done = 1; 5165 } 5166 5167 /* Local syms are a bit tricky. We could 5168 tweak them as they can be cached, but 5169 we'd need to look through the local syms 5170 for the function descriptor sym which we 5171 don't have at the moment. So keep an 5172 array of adjustments. */ 5173 adjust[rel->r_offset / 24] = wptr - rptr; 5174 5175 if (wptr != rptr) 5176 memcpy (wptr, rptr, 24); 5177 wptr += 24; 5178 } 5179 rptr += 24; 5180 offset += 24; 5181 } 5182 5183 if (skip) 5184 { 5185 BFD_ASSERT (MUST_BE_DYN_RELOC (ELF64_R_TYPE (rel->r_info))); 5186 if (info->shared) 5187 { 5188 /* We won't be needing dynamic relocs here. */ 5189 struct ppc_dyn_relocs **pp; 5190 struct ppc_dyn_relocs *p; 5191 5192 if (h != NULL) 5193 pp = &((struct ppc_link_hash_entry *) h)->dyn_relocs; 5194 else if (sym_sec != NULL) 5195 pp = ((struct ppc_dyn_relocs **) 5196 &elf_section_data (sym_sec)->local_dynrel); 5197 else 5198 pp = ((struct ppc_dyn_relocs **) 5199 &elf_section_data (sec)->local_dynrel); 5200 while ((p = *pp) != NULL) 5201 { 5202 if (p->sec == sec) 5203 { 5204 p->count -= 1; 5205 if (p->count == 0) 5206 *pp = p->next; 5207 break; 5208 } 5209 pp = &p->next; 5210 } 5211 } 5212 } 5213 else 5214 { 5215 /* We need to adjust any reloc offsets to point to the 5216 new opd entries. While we're at it, we may as well 5217 remove redundant relocs. */ 5218 rel->r_offset += wptr - rptr; 5219 if (write_rel != rel) 5220 memcpy (write_rel, rel, sizeof (*rel)); 5221 ++write_rel; 5222 } 5223 } 5224 5225 sec->_cooked_size = wptr - sec->contents; 5226 sec->reloc_count = write_rel - relstart; 5227 /* Fudge the size too, as this is used later in 5228 elf_bfd_final_link if we are emitting relocs. */ 5229 elf_section_data (sec)->rel_hdr.sh_size 5230 = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize; 5231 BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL); 5232 some_edited = TRUE; 5233 } 5234 else if (elf_section_data (sec)->relocs != relstart) 5235 free (relstart); 5236 5237 if (local_syms != NULL 5238 && symtab_hdr->contents != (unsigned char *) local_syms) 5239 { 5240 if (!info->keep_memory) 5241 free (local_syms); 5242 else 5243 symtab_hdr->contents = (unsigned char *) local_syms; 5244 } 5245 } 5246 5247 if (some_edited) 5248 elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL); 5249 5250 return TRUE; 5251 } 5252 5253 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ 5254 5255 asection * 5256 ppc64_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) 5257 { 5258 struct ppc_link_hash_table *htab; 5259 5260 htab = ppc_hash_table (info); 5261 if (htab->tls_get_addr != NULL) 5262 { 5263 struct elf_link_hash_entry *h = htab->tls_get_addr; 5264 5265 while (h->root.type == bfd_link_hash_indirect 5266 || h->root.type == bfd_link_hash_warning) 5267 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5268 5269 htab->tls_get_addr = h; 5270 } 5271 5272 return _bfd_elf_tls_setup (obfd, info); 5273 } 5274 5275 /* Run through all the TLS relocs looking for optimization 5276 opportunities. The linker has been hacked (see ppc64elf.em) to do 5277 a preliminary section layout so that we know the TLS segment 5278 offsets. We can't optimize earlier because some optimizations need 5279 to know the tp offset, and we need to optimize before allocating 5280 dynamic relocations. */ 5281 5282 bfd_boolean 5283 ppc64_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) 5284 { 5285 bfd *ibfd; 5286 asection *sec; 5287 struct ppc_link_hash_table *htab; 5288 5289 if (info->relocatable || info->shared) 5290 return TRUE; 5291 5292 htab = ppc_hash_table (info); 5293 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 5294 { 5295 Elf_Internal_Sym *locsyms = NULL; 5296 5297 for (sec = ibfd->sections; sec != NULL; sec = sec->next) 5298 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) 5299 { 5300 Elf_Internal_Rela *relstart, *rel, *relend; 5301 int expecting_tls_get_addr; 5302 5303 /* Read the relocations. */ 5304 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, 5305 info->keep_memory); 5306 if (relstart == NULL) 5307 return FALSE; 5308 5309 expecting_tls_get_addr = 0; 5310 relend = relstart + sec->reloc_count; 5311 for (rel = relstart; rel < relend; rel++) 5312 { 5313 enum elf_ppc64_reloc_type r_type; 5314 unsigned long r_symndx; 5315 struct elf_link_hash_entry *h; 5316 Elf_Internal_Sym *sym; 5317 asection *sym_sec; 5318 char *tls_mask; 5319 char tls_set, tls_clear, tls_type = 0; 5320 bfd_vma value; 5321 bfd_boolean ok_tprel, is_local; 5322 5323 r_symndx = ELF64_R_SYM (rel->r_info); 5324 if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms, 5325 r_symndx, ibfd)) 5326 { 5327 err_free_rel: 5328 if (elf_section_data (sec)->relocs != relstart) 5329 free (relstart); 5330 if (locsyms != NULL 5331 && (elf_tdata (ibfd)->symtab_hdr.contents 5332 != (unsigned char *) locsyms)) 5333 free (locsyms); 5334 return FALSE; 5335 } 5336 5337 if (h != NULL) 5338 { 5339 if (h->root.type != bfd_link_hash_defined 5340 && h->root.type != bfd_link_hash_defweak) 5341 continue; 5342 value = h->root.u.def.value; 5343 } 5344 else 5345 { 5346 value = sym->st_value; 5347 5348 if (elf_section_data (sym_sec) != NULL) 5349 { 5350 long *adjust; 5351 adjust = ppc64_elf_section_data (sym_sec)->opd.adjust; 5352 if (adjust != NULL) 5353 value += adjust[value / 24]; 5354 } 5355 } 5356 5357 ok_tprel = FALSE; 5358 is_local = FALSE; 5359 if (h == NULL 5360 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)) 5361 { 5362 is_local = TRUE; 5363 value += sym_sec->output_offset; 5364 value += sym_sec->output_section->vma; 5365 value -= htab->elf.tls_sec->vma; 5366 ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31) 5367 < (bfd_vma) 1 << 32); 5368 } 5369 5370 r_type = ELF64_R_TYPE (rel->r_info); 5371 switch (r_type) 5372 { 5373 case R_PPC64_GOT_TLSLD16: 5374 case R_PPC64_GOT_TLSLD16_LO: 5375 case R_PPC64_GOT_TLSLD16_HI: 5376 case R_PPC64_GOT_TLSLD16_HA: 5377 /* These relocs should never be against a symbol 5378 defined in a shared lib. Leave them alone if 5379 that turns out to be the case. */ 5380 ppc64_tlsld_got (ibfd)->refcount -= 1; 5381 if (!is_local) 5382 continue; 5383 5384 /* LD -> LE */ 5385 tls_set = 0; 5386 tls_clear = TLS_LD; 5387 tls_type = TLS_TLS | TLS_LD; 5388 expecting_tls_get_addr = 1; 5389 break; 5390 5391 case R_PPC64_GOT_TLSGD16: 5392 case R_PPC64_GOT_TLSGD16_LO: 5393 case R_PPC64_GOT_TLSGD16_HI: 5394 case R_PPC64_GOT_TLSGD16_HA: 5395 if (ok_tprel) 5396 /* GD -> LE */ 5397 tls_set = 0; 5398 else 5399 /* GD -> IE */ 5400 tls_set = TLS_TLS | TLS_TPRELGD; 5401 tls_clear = TLS_GD; 5402 tls_type = TLS_TLS | TLS_GD; 5403 expecting_tls_get_addr = 1; 5404 break; 5405 5406 case R_PPC64_GOT_TPREL16_DS: 5407 case R_PPC64_GOT_TPREL16_LO_DS: 5408 case R_PPC64_GOT_TPREL16_HI: 5409 case R_PPC64_GOT_TPREL16_HA: 5410 expecting_tls_get_addr = 0; 5411 if (ok_tprel) 5412 { 5413 /* IE -> LE */ 5414 tls_set = 0; 5415 tls_clear = TLS_TPREL; 5416 tls_type = TLS_TLS | TLS_TPREL; 5417 break; 5418 } 5419 else 5420 continue; 5421 5422 case R_PPC64_REL14: 5423 case R_PPC64_REL14_BRTAKEN: 5424 case R_PPC64_REL14_BRNTAKEN: 5425 case R_PPC64_REL24: 5426 if (h != NULL 5427 && h == htab->tls_get_addr) 5428 { 5429 if (!expecting_tls_get_addr 5430 && rel != relstart 5431 && ((ELF64_R_TYPE (rel[-1].r_info) 5432 == R_PPC64_TOC16) 5433 || (ELF64_R_TYPE (rel[-1].r_info) 5434 == R_PPC64_TOC16_LO))) 5435 { 5436 /* Check for toc tls entries. */ 5437 char *toc_tls; 5438 int retval; 5439 5440 retval = get_tls_mask (&toc_tls, NULL, &locsyms, 5441 rel - 1, ibfd); 5442 if (retval == 0) 5443 goto err_free_rel; 5444 if (toc_tls != NULL) 5445 expecting_tls_get_addr = retval > 1; 5446 } 5447 5448 if (expecting_tls_get_addr) 5449 { 5450 struct plt_entry *ent; 5451 for (ent = h->plt.plist; ent; ent = ent->next) 5452 if (ent->addend == 0) 5453 { 5454 if (ent->plt.refcount > 0) 5455 ent->plt.refcount -= 1; 5456 break; 5457 } 5458 } 5459 } 5460 expecting_tls_get_addr = 0; 5461 continue; 5462 5463 case R_PPC64_TPREL64: 5464 expecting_tls_get_addr = 0; 5465 if (ok_tprel) 5466 { 5467 /* IE -> LE */ 5468 tls_set = TLS_EXPLICIT; 5469 tls_clear = TLS_TPREL; 5470 break; 5471 } 5472 else 5473 continue; 5474 5475 case R_PPC64_DTPMOD64: 5476 expecting_tls_get_addr = 0; 5477 if (rel + 1 < relend 5478 && (rel[1].r_info 5479 == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)) 5480 && rel[1].r_offset == rel->r_offset + 8) 5481 { 5482 if (ok_tprel) 5483 /* GD -> LE */ 5484 tls_set = TLS_EXPLICIT | TLS_GD; 5485 else 5486 /* GD -> IE */ 5487 tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD; 5488 tls_clear = TLS_GD; 5489 } 5490 else 5491 { 5492 if (!is_local) 5493 continue; 5494 5495 /* LD -> LE */ 5496 tls_set = TLS_EXPLICIT; 5497 tls_clear = TLS_LD; 5498 } 5499 break; 5500 5501 default: 5502 expecting_tls_get_addr = 0; 5503 continue; 5504 } 5505 5506 if ((tls_set & TLS_EXPLICIT) == 0) 5507 { 5508 struct got_entry *ent; 5509 5510 /* Adjust got entry for this reloc. */ 5511 if (h != NULL) 5512 ent = h->got.glist; 5513 else 5514 ent = elf_local_got_ents (ibfd)[r_symndx]; 5515 5516 for (; ent != NULL; ent = ent->next) 5517 if (ent->addend == rel->r_addend 5518 && ent->owner == ibfd 5519 && ent->tls_type == tls_type) 5520 break; 5521 if (ent == NULL) 5522 abort (); 5523 5524 if (tls_set == 0) 5525 { 5526 /* We managed to get rid of a got entry. */ 5527 if (ent->got.refcount > 0) 5528 ent->got.refcount -= 1; 5529 } 5530 } 5531 else if (h != NULL) 5532 { 5533 struct ppc_link_hash_entry * eh; 5534 struct ppc_dyn_relocs **pp; 5535 struct ppc_dyn_relocs *p; 5536 5537 /* Adjust dynamic relocs. */ 5538 eh = (struct ppc_link_hash_entry *) h; 5539 for (pp = &eh->dyn_relocs; 5540 (p = *pp) != NULL; 5541 pp = &p->next) 5542 if (p->sec == sec) 5543 { 5544 /* If we got rid of a DTPMOD/DTPREL reloc 5545 pair then we'll lose one or two dyn 5546 relocs. */ 5547 if (tls_set == (TLS_EXPLICIT | TLS_GD)) 5548 p->count -= 1; 5549 p->count -= 1; 5550 if (p->count == 0) 5551 *pp = p->next; 5552 break; 5553 } 5554 } 5555 5556 *tls_mask |= tls_set; 5557 *tls_mask &= ~tls_clear; 5558 } 5559 5560 if (elf_section_data (sec)->relocs != relstart) 5561 free (relstart); 5562 } 5563 5564 if (locsyms != NULL 5565 && (elf_tdata (ibfd)->symtab_hdr.contents 5566 != (unsigned char *) locsyms)) 5567 { 5568 if (!info->keep_memory) 5569 free (locsyms); 5570 else 5571 elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms; 5572 } 5573 } 5574 return TRUE; 5575 } 5576 5577 /* Allocate space in .plt, .got and associated reloc sections for 5578 dynamic relocs. */ 5579 5580 static bfd_boolean 5581 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) 5582 { 5583 struct bfd_link_info *info; 5584 struct ppc_link_hash_table *htab; 5585 asection *s; 5586 struct ppc_link_hash_entry *eh; 5587 struct ppc_dyn_relocs *p; 5588 struct got_entry *gent; 5589 5590 if (h->root.type == bfd_link_hash_indirect) 5591 return TRUE; 5592 5593 if (h->root.type == bfd_link_hash_warning) 5594 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5595 5596 info = (struct bfd_link_info *) inf; 5597 htab = ppc_hash_table (info); 5598 5599 if (htab->elf.dynamic_sections_created 5600 && h->dynindx != -1 5601 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) 5602 { 5603 struct plt_entry *pent; 5604 bfd_boolean doneone = FALSE; 5605 for (pent = h->plt.plist; pent != NULL; pent = pent->next) 5606 if (pent->plt.refcount > 0) 5607 { 5608 BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor); 5609 5610 /* If this is the first .plt entry, make room for the special 5611 first entry. */ 5612 s = htab->plt; 5613 if (s->_raw_size == 0) 5614 s->_raw_size += PLT_INITIAL_ENTRY_SIZE; 5615 5616 pent->plt.offset = s->_raw_size; 5617 5618 /* Make room for this entry. */ 5619 s->_raw_size += PLT_ENTRY_SIZE; 5620 5621 /* Make room for the .glink code. */ 5622 s = htab->glink; 5623 if (s->_raw_size == 0) 5624 s->_raw_size += GLINK_CALL_STUB_SIZE; 5625 /* We need bigger stubs past index 32767. */ 5626 if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4) 5627 s->_raw_size += 4; 5628 s->_raw_size += 2*4; 5629 5630 /* We also need to make an entry in the .rela.plt section. */ 5631 s = htab->relplt; 5632 s->_raw_size += sizeof (Elf64_External_Rela); 5633 doneone = TRUE; 5634 } 5635 else 5636 pent->plt.offset = (bfd_vma) -1; 5637 if (!doneone) 5638 { 5639 h->plt.plist = NULL; 5640 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; 5641 } 5642 } 5643 else 5644 { 5645 h->plt.plist = NULL; 5646 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; 5647 } 5648 5649 eh = (struct ppc_link_hash_entry *) h; 5650 /* Run through the TLS GD got entries first if we're changing them 5651 to TPREL. */ 5652 if ((eh->tls_mask & TLS_TPRELGD) != 0) 5653 for (gent = h->got.glist; gent != NULL; gent = gent->next) 5654 if (gent->got.refcount > 0 5655 && (gent->tls_type & TLS_GD) != 0) 5656 { 5657 /* This was a GD entry that has been converted to TPREL. If 5658 there happens to be a TPREL entry we can use that one. */ 5659 struct got_entry *ent; 5660 for (ent = h->got.glist; ent != NULL; ent = ent->next) 5661 if (ent->got.refcount > 0 5662 && (ent->tls_type & TLS_TPREL) != 0 5663 && ent->addend == gent->addend 5664 && ent->owner == gent->owner) 5665 { 5666 gent->got.refcount = 0; 5667 break; 5668 } 5669 5670 /* If not, then we'll be using our own TPREL entry. */ 5671 if (gent->got.refcount != 0) 5672 gent->tls_type = TLS_TLS | TLS_TPREL; 5673 } 5674 5675 for (gent = h->got.glist; gent != NULL; gent = gent->next) 5676 if (gent->got.refcount > 0) 5677 { 5678 bfd_boolean dyn; 5679 5680 /* Make sure this symbol is output as a dynamic symbol. 5681 Undefined weak syms won't yet be marked as dynamic, 5682 nor will all TLS symbols. */ 5683 if (h->dynindx == -1 5684 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) 5685 { 5686 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 5687 return FALSE; 5688 } 5689 5690 if ((gent->tls_type & TLS_LD) != 0 5691 && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)) 5692 { 5693 gent->got.offset = ppc64_tlsld_got (gent->owner)->offset; 5694 continue; 5695 } 5696 5697 s = ppc64_elf_tdata (gent->owner)->got; 5698 gent->got.offset = s->_raw_size; 5699 s->_raw_size 5700 += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8; 5701 dyn = htab->elf.dynamic_sections_created; 5702 if ((info->shared 5703 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) 5704 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 5705 || h->root.type != bfd_link_hash_undefweak)) 5706 ppc64_elf_tdata (gent->owner)->relgot->_raw_size 5707 += (gent->tls_type & eh->tls_mask & TLS_GD 5708 ? 2 * sizeof (Elf64_External_Rela) 5709 : sizeof (Elf64_External_Rela)); 5710 } 5711 else 5712 gent->got.offset = (bfd_vma) -1; 5713 5714 if (eh->dyn_relocs == NULL) 5715 return TRUE; 5716 5717 /* In the shared -Bsymbolic case, discard space allocated for 5718 dynamic pc-relative relocs against symbols which turn out to be 5719 defined in regular objects. For the normal shared case, discard 5720 space for relocs that have become local due to symbol visibility 5721 changes. */ 5722 5723 if (info->shared) 5724 { 5725 /* Relocs that use pc_count are those that appear on a call insn, 5726 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be 5727 generated via assembly. We want calls to protected symbols to 5728 resolve directly to the function rather than going via the plt. 5729 If people want function pointer comparisons to work as expected 5730 then they should avoid writing weird assembly. */ 5731 if (SYMBOL_CALLS_LOCAL (info, h)) 5732 { 5733 struct ppc_dyn_relocs **pp; 5734 5735 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) 5736 { 5737 p->count -= p->pc_count; 5738 p->pc_count = 0; 5739 if (p->count == 0) 5740 *pp = p->next; 5741 else 5742 pp = &p->next; 5743 } 5744 } 5745 5746 /* Also discard relocs on undefined weak syms with non-default 5747 visibility. */ 5748 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT 5749 && h->root.type == bfd_link_hash_undefweak) 5750 eh->dyn_relocs = NULL; 5751 } 5752 else if (ELIMINATE_COPY_RELOCS) 5753 { 5754 /* For the non-shared case, discard space for relocs against 5755 symbols which turn out to need copy relocs or are not 5756 dynamic. */ 5757 5758 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 5759 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 5760 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) 5761 { 5762 /* Make sure this symbol is output as a dynamic symbol. 5763 Undefined weak syms won't yet be marked as dynamic. */ 5764 if (h->dynindx == -1 5765 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) 5766 { 5767 if (! bfd_elf_link_record_dynamic_symbol (info, h)) 5768 return FALSE; 5769 } 5770 5771 /* If that succeeded, we know we'll be keeping all the 5772 relocs. */ 5773 if (h->dynindx != -1) 5774 goto keep; 5775 } 5776 5777 eh->dyn_relocs = NULL; 5778 5779 keep: ; 5780 } 5781 5782 /* Finally, allocate space. */ 5783 for (p = eh->dyn_relocs; p != NULL; p = p->next) 5784 { 5785 asection *sreloc = elf_section_data (p->sec)->sreloc; 5786 sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); 5787 } 5788 5789 return TRUE; 5790 } 5791 5792 /* Find any dynamic relocs that apply to read-only sections. */ 5793 5794 static bfd_boolean 5795 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) 5796 { 5797 struct ppc_link_hash_entry *eh; 5798 struct ppc_dyn_relocs *p; 5799 5800 if (h->root.type == bfd_link_hash_warning) 5801 h = (struct elf_link_hash_entry *) h->root.u.i.link; 5802 5803 eh = (struct ppc_link_hash_entry *) h; 5804 for (p = eh->dyn_relocs; p != NULL; p = p->next) 5805 { 5806 asection *s = p->sec->output_section; 5807 5808 if (s != NULL && (s->flags & SEC_READONLY) != 0) 5809 { 5810 struct bfd_link_info *info = inf; 5811 5812 info->flags |= DF_TEXTREL; 5813 5814 /* Not an error, just cut short the traversal. */ 5815 return FALSE; 5816 } 5817 } 5818 return TRUE; 5819 } 5820 5821 /* Set the sizes of the dynamic sections. */ 5822 5823 static bfd_boolean 5824 ppc64_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, 5825 struct bfd_link_info *info) 5826 { 5827 struct ppc_link_hash_table *htab; 5828 bfd *dynobj; 5829 asection *s; 5830 bfd_boolean relocs; 5831 bfd *ibfd; 5832 5833 htab = ppc_hash_table (info); 5834 dynobj = htab->elf.dynobj; 5835 if (dynobj == NULL) 5836 abort (); 5837 5838 if (htab->elf.dynamic_sections_created) 5839 { 5840 /* Set the contents of the .interp section to the interpreter. */ 5841 if (info->executable) 5842 { 5843 s = bfd_get_section_by_name (dynobj, ".interp"); 5844 if (s == NULL) 5845 abort (); 5846 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; 5847 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; 5848 } 5849 } 5850 5851 /* Set up .got offsets for local syms, and space for local dynamic 5852 relocs. */ 5853 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 5854 { 5855 struct got_entry **lgot_ents; 5856 struct got_entry **end_lgot_ents; 5857 char *lgot_masks; 5858 bfd_size_type locsymcount; 5859 Elf_Internal_Shdr *symtab_hdr; 5860 asection *srel; 5861 5862 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) 5863 continue; 5864 5865 if (ppc64_tlsld_got (ibfd)->refcount > 0) 5866 { 5867 s = ppc64_elf_tdata (ibfd)->got; 5868 ppc64_tlsld_got (ibfd)->offset = s->_raw_size; 5869 s->_raw_size += 16; 5870 if (info->shared) 5871 { 5872 srel = ppc64_elf_tdata (ibfd)->relgot; 5873 srel->_raw_size += sizeof (Elf64_External_Rela); 5874 } 5875 } 5876 else 5877 ppc64_tlsld_got (ibfd)->offset = (bfd_vma) -1; 5878 5879 for (s = ibfd->sections; s != NULL; s = s->next) 5880 { 5881 struct ppc_dyn_relocs *p; 5882 5883 for (p = *((struct ppc_dyn_relocs **) 5884 &elf_section_data (s)->local_dynrel); 5885 p != NULL; 5886 p = p->next) 5887 { 5888 if (!bfd_is_abs_section (p->sec) 5889 && bfd_is_abs_section (p->sec->output_section)) 5890 { 5891 /* Input section has been discarded, either because 5892 it is a copy of a linkonce section or due to 5893 linker script /DISCARD/, so we'll be discarding 5894 the relocs too. */ 5895 } 5896 else if (p->count != 0) 5897 { 5898 srel = elf_section_data (p->sec)->sreloc; 5899 srel->_raw_size += p->count * sizeof (Elf64_External_Rela); 5900 if ((p->sec->output_section->flags & SEC_READONLY) != 0) 5901 info->flags |= DF_TEXTREL; 5902 } 5903 } 5904 } 5905 5906 lgot_ents = elf_local_got_ents (ibfd); 5907 if (!lgot_ents) 5908 continue; 5909 5910 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; 5911 locsymcount = symtab_hdr->sh_info; 5912 end_lgot_ents = lgot_ents + locsymcount; 5913 lgot_masks = (char *) end_lgot_ents; 5914 s = ppc64_elf_tdata (ibfd)->got; 5915 srel = ppc64_elf_tdata (ibfd)->relgot; 5916 for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) 5917 { 5918 struct got_entry *ent; 5919 5920 for (ent = *lgot_ents; ent != NULL; ent = ent->next) 5921 if (ent->got.refcount > 0) 5922 { 5923 if ((ent->tls_type & *lgot_masks & TLS_LD) != 0) 5924 { 5925 if (ppc64_tlsld_got (ibfd)->offset == (bfd_vma) -1) 5926 { 5927 ppc64_tlsld_got (ibfd)->offset = s->_raw_size; 5928 s->_raw_size += 16; 5929 if (info->shared) 5930 srel->_raw_size += sizeof (Elf64_External_Rela); 5931 } 5932 ent->got.offset = ppc64_tlsld_got (ibfd)->offset; 5933 } 5934 else 5935 { 5936 ent->got.offset = s->_raw_size; 5937 if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) 5938 { 5939 s->_raw_size += 16; 5940 if (info->shared) 5941 srel->_raw_size += 2 * sizeof (Elf64_External_Rela); 5942 } 5943 else 5944 { 5945 s->_raw_size += 8; 5946 if (info->shared) 5947 srel->_raw_size += sizeof (Elf64_External_Rela); 5948 } 5949 } 5950 } 5951 else 5952 ent->got.offset = (bfd_vma) -1; 5953 } 5954 } 5955 5956 /* Allocate global sym .plt and .got entries, and space for global 5957 sym dynamic relocs. */ 5958 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); 5959 5960 /* We now have determined the sizes of the various dynamic sections. 5961 Allocate memory for them. */ 5962 relocs = FALSE; 5963 for (s = dynobj->sections; s != NULL; s = s->next) 5964 { 5965 if ((s->flags & SEC_LINKER_CREATED) == 0) 5966 continue; 5967 5968 /* Reset _cooked_size since prelim layout will set it wrongly, 5969 and a non-zero _cooked_size sticks. */ 5970 s->_cooked_size = 0; 5971 5972 if (s == htab->brlt || s == htab->relbrlt) 5973 /* These haven't been allocated yet; don't strip. */ 5974 continue; 5975 else if (s == htab->got 5976 || s == htab->plt 5977 || s == htab->glink) 5978 { 5979 /* Strip this section if we don't need it; see the 5980 comment below. */ 5981 } 5982 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) 5983 { 5984 if (s->_raw_size == 0) 5985 { 5986 /* If we don't need this section, strip it from the 5987 output file. This is mostly to handle .rela.bss and 5988 .rela.plt. We must create both sections in 5989 create_dynamic_sections, because they must be created 5990 before the linker maps input sections to output 5991 sections. The linker does that before 5992 adjust_dynamic_symbol is called, and it is that 5993 function which decides whether anything needs to go 5994 into these sections. */ 5995 } 5996 else 5997 { 5998 if (s != htab->relplt) 5999 relocs = TRUE; 6000 6001 /* We use the reloc_count field as a counter if we need 6002 to copy relocs into the output file. */ 6003 s->reloc_count = 0; 6004 } 6005 } 6006 else 6007 { 6008 /* It's not one of our sections, so don't allocate space. */ 6009 continue; 6010 } 6011 6012 if (s->_raw_size == 0) 6013 { 6014 _bfd_strip_section_from_output (info, s); 6015 continue; 6016 } 6017 6018 /* .plt is in the bss section. We don't initialise it. */ 6019 if (s == htab->plt) 6020 continue; 6021 6022 /* Allocate memory for the section contents. We use bfd_zalloc 6023 here in case unused entries are not reclaimed before the 6024 section's contents are written out. This should not happen, 6025 but this way if it does we get a R_PPC64_NONE reloc in .rela 6026 sections instead of garbage. 6027 We also rely on the section contents being zero when writing 6028 the GOT. */ 6029 s->contents = bfd_zalloc (dynobj, s->_raw_size); 6030 if (s->contents == NULL) 6031 return FALSE; 6032 } 6033 6034 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) 6035 { 6036 s = ppc64_elf_tdata (ibfd)->got; 6037 if (s != NULL && s != htab->got) 6038 { 6039 s->_cooked_size = 0; 6040 if (s->_raw_size == 0) 6041 _bfd_strip_section_from_output (info, s); 6042 else 6043 { 6044 s->contents = bfd_zalloc (ibfd, s->_raw_size); 6045 if (s->contents == NULL) 6046 return FALSE; 6047 } 6048 } 6049 s = ppc64_elf_tdata (ibfd)->relgot; 6050 if (s != NULL) 6051 { 6052 s->_cooked_size = 0; 6053 if (s->_raw_size == 0) 6054 _bfd_strip_section_from_output (info, s); 6055 else 6056 { 6057 s->contents = bfd_zalloc (ibfd, s->_raw_size); 6058 if (s->contents == NULL) 6059 return FALSE; 6060 relocs = TRUE; 6061 s->reloc_count = 0; 6062 } 6063 } 6064 } 6065 6066 if (htab->elf.dynamic_sections_created) 6067 { 6068 /* Add some entries to the .dynamic section. We fill in the 6069 values later, in ppc64_elf_finish_dynamic_sections, but we 6070 must add the entries now so that we get the correct size for 6071 the .dynamic section. The DT_DEBUG entry is filled in by the 6072 dynamic linker and used by the debugger. */ 6073 #define add_dynamic_entry(TAG, VAL) \ 6074 _bfd_elf_add_dynamic_entry (info, TAG, VAL) 6075 6076 if (info->executable) 6077 { 6078 if (!add_dynamic_entry (DT_DEBUG, 0)) 6079 return FALSE; 6080 } 6081 6082 if (htab->plt != NULL && htab->plt->_raw_size != 0) 6083 { 6084 if (!add_dynamic_entry (DT_PLTGOT, 0) 6085 || !add_dynamic_entry (DT_PLTRELSZ, 0) 6086 || !add_dynamic_entry (DT_PLTREL, DT_RELA) 6087 || !add_dynamic_entry (DT_JMPREL, 0) 6088 || !add_dynamic_entry (DT_PPC64_GLINK, 0)) 6089 return FALSE; 6090 } 6091 6092 if (NO_OPD_RELOCS) 6093 { 6094 if (!add_dynamic_entry (DT_PPC64_OPD, 0) 6095 || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) 6096 return FALSE; 6097 } 6098 6099 if (relocs) 6100 { 6101 if (!add_dynamic_entry (DT_RELA, 0) 6102 || !add_dynamic_entry (DT_RELASZ, 0) 6103 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) 6104 return FALSE; 6105 6106 /* If any dynamic relocs apply to a read-only section, 6107 then we need a DT_TEXTREL entry. */ 6108 if ((info->flags & DF_TEXTREL) == 0) 6109 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info); 6110 6111 if ((info->flags & DF_TEXTREL) != 0) 6112 { 6113 if (!add_dynamic_entry (DT_TEXTREL, 0)) 6114 return FALSE; 6115 } 6116 } 6117 } 6118 #undef add_dynamic_entry 6119 6120 return TRUE; 6121 } 6122 6123 /* Determine the type of stub needed, if any, for a call. */ 6124 6125 static inline enum ppc_stub_type 6126 ppc_type_of_stub (asection *input_sec, 6127 const Elf_Internal_Rela *rel, 6128 struct ppc_link_hash_entry **hash, 6129 bfd_vma destination) 6130 { 6131 struct ppc_link_hash_entry *h = *hash; 6132 bfd_vma location; 6133 bfd_vma branch_offset; 6134 bfd_vma max_branch_offset; 6135 enum elf_ppc64_reloc_type r_type; 6136 6137 if (h != NULL) 6138 { 6139 if (h->oh != NULL 6140 && h->oh->dynindx != -1) 6141 { 6142 struct plt_entry *ent; 6143 for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next) 6144 if (ent->addend == rel->r_addend 6145 && ent->plt.offset != (bfd_vma) -1) 6146 { 6147 *hash = (struct ppc_link_hash_entry *) h->oh; 6148 return ppc_stub_plt_call; 6149 } 6150 } 6151 6152 if (!(h->elf.root.type == bfd_link_hash_defined 6153 || h->elf.root.type == bfd_link_hash_defweak) 6154 || h->elf.root.u.def.section->output_section == NULL) 6155 return ppc_stub_none; 6156 } 6157 6158 /* Determine where the call point is. */ 6159 location = (input_sec->output_offset 6160 + input_sec->output_section->vma 6161 + rel->r_offset); 6162 6163 branch_offset = destination - location; 6164 r_type = ELF64_R_TYPE (rel->r_info); 6165 6166 /* Determine if a long branch stub is needed. */ 6167 max_branch_offset = 1 << 25; 6168 if (r_type != R_PPC64_REL24) 6169 max_branch_offset = 1 << 15; 6170 6171 if (branch_offset + max_branch_offset >= 2 * max_branch_offset) 6172 /* We need a stub. Figure out whether a long_branch or plt_branch 6173 is needed later. */ 6174 return ppc_stub_long_branch; 6175 6176 return ppc_stub_none; 6177 } 6178 6179 /* Build a .plt call stub. */ 6180 6181 static inline bfd_byte * 6182 build_plt_stub (bfd *obfd, bfd_byte *p, int offset) 6183 { 6184 #define PPC_LO(v) ((v) & 0xffff) 6185 #define PPC_HI(v) (((v) >> 16) & 0xffff) 6186 #define PPC_HA(v) PPC_HI ((v) + 0x8000) 6187 6188 bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; 6189 bfd_put_32 (obfd, STD_R2_40R1, p), p += 4; 6190 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; 6191 if (PPC_HA (offset + 8) != PPC_HA (offset)) 6192 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4; 6193 offset += 8; 6194 bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4; 6195 if (PPC_HA (offset + 8) != PPC_HA (offset)) 6196 bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4; 6197 offset += 8; 6198 bfd_put_32 (obfd, MTCTR_R11, p), p += 4; 6199 bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; 6200 bfd_put_32 (obfd, BCTR, p), p += 4; 6201 return p; 6202 } 6203 6204 static bfd_boolean 6205 ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) 6206 { 6207 struct ppc_stub_hash_entry *stub_entry; 6208 struct ppc_branch_hash_entry *br_entry; 6209 struct bfd_link_info *info; 6210 struct ppc_link_hash_table *htab; 6211 bfd_byte *loc; 6212 bfd_byte *p; 6213 unsigned int indx; 6214 struct plt_entry *ent; 6215 bfd_vma off; 6216 int size; 6217 6218 /* Massage our args to the form they really have. */ 6219 stub_entry = (struct ppc_stub_hash_entry *) gen_entry; 6220 info = in_arg; 6221 6222 htab = ppc_hash_table (info); 6223 6224 /* Make a note of the offset within the stubs for this entry. */ 6225 stub_entry->stub_offset = stub_entry->stub_sec->_cooked_size; 6226 loc = stub_entry->stub_sec->contents + stub_entry->stub_offset; 6227 6228 htab->stub_count[stub_entry->stub_type - 1] += 1; 6229 switch (stub_entry->stub_type) 6230 { 6231 case ppc_stub_long_branch: 6232 case ppc_stub_long_branch_r2off: 6233 /* Branches are relative. This is where we are going to. */ 6234 off = (stub_entry->target_value 6235 + stub_entry->target_section->output_offset 6236 + stub_entry->target_section->output_section->vma); 6237 6238 /* And this is where we are coming from. */ 6239 off -= (stub_entry->stub_offset 6240 + stub_entry->stub_sec->output_offset 6241 + stub_entry->stub_sec->output_section->vma); 6242 6243 if (stub_entry->stub_type != ppc_stub_long_branch_r2off) 6244 size = 4; 6245 else 6246 { 6247 bfd_vma r2off; 6248 6249 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off 6250 - htab->stub_group[stub_entry->id_sec->id].toc_off); 6251 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc); 6252 loc += 4; 6253 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); 6254 loc += 4; 6255 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); 6256 loc += 4; 6257 off -= 12; 6258 size = 16; 6259 } 6260 bfd_put_32 (htab->stub_bfd, B_DOT | (off & 0x3fffffc), loc); 6261 6262 BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26)); 6263 break; 6264 6265 case ppc_stub_plt_branch: 6266 case ppc_stub_plt_branch_r2off: 6267 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, 6268 stub_entry->root.string + 9, 6269 FALSE, FALSE); 6270 if (br_entry == NULL) 6271 { 6272 (*_bfd_error_handler) (_("can't find branch stub `%s'"), 6273 stub_entry->root.string + 9); 6274 htab->stub_error = TRUE; 6275 return FALSE; 6276 } 6277 6278 off = (stub_entry->target_value 6279 + stub_entry->target_section->output_offset 6280 + stub_entry->target_section->output_section->vma); 6281 6282 bfd_put_64 (htab->brlt->owner, off, 6283 htab->brlt->contents + br_entry->offset); 6284 6285 if (info->shared) 6286 { 6287 /* Create a reloc for the branch lookup table entry. */ 6288 Elf_Internal_Rela rela; 6289 bfd_byte *rl; 6290 6291 rela.r_offset = (br_entry->offset 6292 + htab->brlt->output_offset 6293 + htab->brlt->output_section->vma); 6294 rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); 6295 rela.r_addend = off; 6296 6297 rl = htab->relbrlt->contents; 6298 rl += htab->relbrlt->reloc_count++ * sizeof (Elf64_External_Rela); 6299 bfd_elf64_swap_reloca_out (htab->relbrlt->owner, &rela, rl); 6300 } 6301 6302 off = (br_entry->offset 6303 + htab->brlt->output_offset 6304 + htab->brlt->output_section->vma 6305 - elf_gp (htab->brlt->output_section->owner) 6306 - htab->stub_group[stub_entry->id_sec->id].toc_off); 6307 6308 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) 6309 { 6310 (*_bfd_error_handler) 6311 (_("linkage table error against `%s'"), 6312 stub_entry->root.string); 6313 bfd_set_error (bfd_error_bad_value); 6314 htab->stub_error = TRUE; 6315 return FALSE; 6316 } 6317 6318 indx = off; 6319 if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) 6320 { 6321 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc); 6322 loc += 4; 6323 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc); 6324 size = 16; 6325 } 6326 else 6327 { 6328 bfd_vma r2off; 6329 6330 r2off = (htab->stub_group[stub_entry->target_section->id].toc_off 6331 - htab->stub_group[stub_entry->id_sec->id].toc_off); 6332 bfd_put_32 (htab->stub_bfd, STD_R2_40R1, loc); 6333 loc += 4; 6334 bfd_put_32 (htab->stub_bfd, ADDIS_R12_R2 | PPC_HA (indx), loc); 6335 loc += 4; 6336 bfd_put_32 (htab->stub_bfd, LD_R11_0R12 | PPC_LO (indx), loc); 6337 loc += 4; 6338 bfd_put_32 (htab->stub_bfd, ADDIS_R2_R2 | PPC_HA (r2off), loc); 6339 loc += 4; 6340 bfd_put_32 (htab->stub_bfd, ADDI_R2_R2 | PPC_LO (r2off), loc); 6341 size = 28; 6342 } 6343 loc += 4; 6344 bfd_put_32 (htab->stub_bfd, MTCTR_R11, loc); 6345 loc += 4; 6346 bfd_put_32 (htab->stub_bfd, BCTR, loc); 6347 break; 6348 6349 case ppc_stub_plt_call: 6350 /* Do the best we can for shared libraries built without 6351 exporting ".foo" for each "foo". This can happen when symbol 6352 versioning scripts strip all bar a subset of symbols. */ 6353 if (stub_entry->h->oh->root.type != bfd_link_hash_defined 6354 && stub_entry->h->oh->root.type != bfd_link_hash_defweak) 6355 { 6356 /* Point the symbol at the stub. There may be multiple stubs, 6357 we don't really care; The main thing is to make this sym 6358 defined somewhere. Maybe defining the symbol in the stub 6359 section is a silly idea. If we didn't do this, htab->top_id 6360 could disappear. */ 6361 stub_entry->h->oh->root.type = bfd_link_hash_defined; 6362 stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec; 6363 stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset; 6364 } 6365 6366 /* Now build the stub. */ 6367 off = (bfd_vma) -1; 6368 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next) 6369 if (ent->addend == stub_entry->addend) 6370 { 6371 off = ent->plt.offset; 6372 break; 6373 } 6374 if (off >= (bfd_vma) -2) 6375 abort (); 6376 6377 off &= ~ (bfd_vma) 1; 6378 off += (htab->plt->output_offset 6379 + htab->plt->output_section->vma 6380 - elf_gp (htab->plt->output_section->owner) 6381 - htab->stub_group[stub_entry->id_sec->id].toc_off); 6382 6383 if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) 6384 { 6385 (*_bfd_error_handler) 6386 (_("linkage table error against `%s'"), 6387 stub_entry->h->elf.root.root.string); 6388 bfd_set_error (bfd_error_bad_value); 6389 htab->stub_error = TRUE; 6390 return FALSE; 6391 } 6392 6393 p = build_plt_stub (htab->stub_bfd, loc, off); 6394 size = p - loc; 6395 break; 6396 6397 default: 6398 BFD_FAIL (); 6399 return FALSE; 6400 } 6401 6402 stub_entry->stub_sec->_cooked_size += size; 6403 6404 if (htab->emit_stub_syms 6405 && !(stub_entry->stub_type == ppc_stub_plt_call 6406 && stub_entry->h->oh->root.type == bfd_link_hash_defined 6407 && stub_entry->h->oh->root.u.def.section == stub_entry->stub_sec 6408 && stub_entry->h->oh->root.u.def.value == stub_entry->stub_offset)) 6409 { 6410 struct elf_link_hash_entry *h; 6411 h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string, 6412 TRUE, FALSE, FALSE); 6413 if (h == NULL) 6414 return FALSE; 6415 if (h->root.type == bfd_link_hash_new) 6416 { 6417 h->root.type = bfd_link_hash_defined; 6418 h->root.u.def.section = stub_entry->stub_sec; 6419 h->root.u.def.value = stub_entry->stub_offset; 6420 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR 6421 | ELF_LINK_HASH_DEF_REGULAR 6422 | ELF_LINK_HASH_REF_REGULAR_NONWEAK 6423 | ELF_LINK_FORCED_LOCAL); 6424 } 6425 } 6426 6427 return TRUE; 6428 } 6429 6430 /* As above, but don't actually build the stub. Just bump offset so 6431 we know stub section sizes, and select plt_branch stubs where 6432 long_branch stubs won't do. */ 6433 6434 static bfd_boolean 6435 ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) 6436 { 6437 struct ppc_stub_hash_entry *stub_entry; 6438 struct bfd_link_info *info; 6439 struct ppc_link_hash_table *htab; 6440 bfd_vma off; 6441 int size; 6442 6443 /* Massage our args to the form they really have. */ 6444 stub_entry = (struct ppc_stub_hash_entry *) gen_entry; 6445 info = in_arg; 6446 6447 htab = ppc_hash_table (info); 6448 6449 if (stub_entry->stub_type == ppc_stub_plt_call) 6450 { 6451 struct plt_entry *ent; 6452 off = (bfd_vma) -1; 6453 for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next) 6454 if (ent->addend == stub_entry->addend) 6455 { 6456 off = ent->plt.offset & ~(bfd_vma) 1; 6457 break; 6458 } 6459 if (off >= (bfd_vma) -2) 6460 abort (); 6461 off += (htab->plt->output_offset 6462 + htab->plt->output_section->vma 6463 - elf_gp (htab->plt->output_section->owner) 6464 - htab->stub_group[stub_entry->id_sec->id].toc_off); 6465 6466 size = PLT_CALL_STUB_SIZE; 6467 if (PPC_HA (off + 16) != PPC_HA (off)) 6468 size += 4; 6469 } 6470 else 6471 { 6472 /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off 6473 variants. */ 6474 off = (stub_entry->target_value 6475 + stub_entry->target_section->output_offset 6476 + stub_entry->target_section->output_section->vma); 6477 off -= (stub_entry->stub_sec->_raw_size 6478 + stub_entry->stub_sec->output_offset 6479 + stub_entry->stub_sec->output_section->vma); 6480 6481 /* Reset the stub type from the plt variant in case we now 6482 can reach with a shorter stub. */ 6483 if (stub_entry->stub_type >= ppc_stub_plt_branch) 6484 stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch; 6485 6486 size = 4; 6487 if (stub_entry->stub_type == ppc_stub_long_branch_r2off) 6488 { 6489 off -= 12; 6490 size = 16; 6491 } 6492 6493 /* If the branch offset if too big, use a ppc_stub_plt_branch. */ 6494 if (off + (1 << 25) >= (bfd_vma) (1 << 26)) 6495 { 6496 struct ppc_branch_hash_entry *br_entry; 6497 6498 br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, 6499 stub_entry->root.string + 9, 6500 TRUE, FALSE); 6501 if (br_entry == NULL) 6502 { 6503 (*_bfd_error_handler) (_("can't build branch stub `%s'"), 6504 stub_entry->root.string + 9); 6505 htab->stub_error = TRUE; 6506 return FALSE; 6507 } 6508 6509 if (br_entry->iter != htab->stub_iteration) 6510 { 6511 br_entry->iter = htab->stub_iteration; 6512 br_entry->offset = htab->brlt->_raw_size; 6513 htab->brlt->_raw_size += 8; 6514 6515 if (info->shared) 6516 htab->relbrlt->_raw_size += sizeof (Elf64_External_Rela); 6517 } 6518 6519 stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch; 6520 size = 16; 6521 if (stub_entry->stub_type != ppc_stub_plt_branch) 6522 size = 28; 6523 } 6524 } 6525 6526 stub_entry->stub_sec->_raw_size += size; 6527 return TRUE; 6528 } 6529 6530 /* Set up various things so that we can make a list of input sections 6531 for each output section included in the link. Returns -1 on error, 6532 0 when no stubs will be needed, and 1 on success. */ 6533 6534 int 6535 ppc64_elf_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) 6536 { 6537 bfd *input_bfd; 6538 int top_id, top_index, id; 6539 asection *section; 6540 asection **input_list; 6541 bfd_size_type amt; 6542 struct ppc_link_hash_table *htab = ppc_hash_table (info); 6543 6544 if (htab->brlt == NULL) 6545 return 0; 6546 6547 /* Find the top input section id. */ 6548 for (input_bfd = info->input_bfds, top_id = 3; 6549 input_bfd != NULL; 6550 input_bfd = input_bfd->link_next) 6551 { 6552 for (section = input_bfd->sections; 6553 section != NULL; 6554 section = section->next) 6555 { 6556 if (top_id < section->id) 6557 top_id = section->id; 6558 } 6559 } 6560 6561 htab->top_id = top_id; 6562 amt = sizeof (struct map_stub) * (top_id + 1); 6563 htab->stub_group = bfd_zmalloc (amt); 6564 if (htab->stub_group == NULL) 6565 return -1; 6566 6567 /* Set toc_off for com, und, abs and ind sections. */ 6568 for (id = 0; id < 3; id++) 6569 htab->stub_group[id].toc_off = TOC_BASE_OFF; 6570 6571 elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd); 6572 6573 /* We can't use output_bfd->section_count here to find the top output 6574 section index as some sections may have been removed, and 6575 _bfd_strip_section_from_output doesn't renumber the indices. */ 6576 for (section = output_bfd->sections, top_index = 0; 6577 section != NULL; 6578 section = section->next) 6579 { 6580 if (top_index < section->index) 6581 top_index = section->index; 6582 } 6583 6584 htab->top_index = top_index; 6585 amt = sizeof (asection *) * (top_index + 1); 6586 input_list = bfd_zmalloc (amt); 6587 htab->input_list = input_list; 6588 if (input_list == NULL) 6589 return -1; 6590 6591 return 1; 6592 } 6593 6594 /* The linker repeatedly calls this function for each TOC input section 6595 and linker generated GOT section. Group input bfds such that the toc 6596 within a group is less than 64k in size. Will break with cute linker 6597 scripts that play games with dot in the output toc section. */ 6598 6599 void 6600 ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec) 6601 { 6602 struct ppc_link_hash_table *htab = ppc_hash_table (info); 6603 6604 if (!htab->no_multi_toc) 6605 { 6606 bfd_vma addr = isec->output_offset + isec->output_section->vma; 6607 bfd_vma off = addr - htab->toc_curr; 6608 if (off + isec->_raw_size > 0x10000) 6609 { 6610 htab->toc_curr = addr; 6611 htab->multi_toc_needed = 1; 6612 } 6613 elf_gp (isec->owner) = (htab->toc_curr 6614 - elf_gp (isec->output_section->owner) 6615 + TOC_BASE_OFF); 6616 } 6617 } 6618 6619 /* Called after the last call to the above function. */ 6620 6621 void 6622 ppc64_elf_reinit_toc (bfd *output_bfd ATTRIBUTE_UNUSED, 6623 struct bfd_link_info *info) 6624 { 6625 struct ppc_link_hash_table *htab = ppc_hash_table (info); 6626 6627 /* toc_curr tracks the TOC offset used for code sections below in 6628 ppc64_elf_next_input_section. Start off at 0x8000. */ 6629 htab->toc_curr = TOC_BASE_OFF; 6630 } 6631 6632 /* No toc references were found in ISEC. If the code in ISEC makes no 6633 calls, then there's no need to use toc adjusting stubs when branching 6634 into ISEC. Actually, indirect calls from ISEC are OK as they will 6635 load r2. */ 6636 6637 static int 6638 toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec) 6639 { 6640 bfd_byte *contents; 6641 bfd_size_type i; 6642 int ret; 6643 int branch_ok; 6644 6645 /* We know none of our code bearing sections will need toc stubs. */ 6646 if ((isec->flags & SEC_LINKER_CREATED) != 0) 6647 return 0; 6648 6649 if (isec->_raw_size == 0) 6650 return 0; 6651 6652 /* Hack for linux kernel. .fixup contains branches, but only back to 6653 the function that hit an exception. */ 6654 branch_ok = strcmp (isec->name, ".fixup") == 0; 6655 6656 contents = elf_section_data (isec)->this_hdr.contents; 6657 if (contents == NULL) 6658 { 6659 contents = bfd_malloc (isec->_raw_size); 6660 if (contents == NULL) 6661 return -1; 6662 if (! bfd_get_section_contents (isec->owner, isec, contents, 6663 0, isec->_raw_size)) 6664 { 6665 free (contents); 6666 return -1; 6667 } 6668 if (info->keep_memory) 6669 elf_section_data (isec)->this_hdr.contents = contents; 6670 } 6671 6672 /* Code scan, because we don't necessarily have relocs on calls to 6673 static functions. */ 6674 ret = 0; 6675 for (i = 0; i < isec->_raw_size; i += 4) 6676 { 6677 unsigned long insn = bfd_get_32 (isec->owner, contents + i); 6678 /* Is this a branch? */ 6679 if ((insn & (0x3f << 26)) == (18 << 26) 6680 /* If branch and link, it's a function call. */ 6681 && ((insn & 1) != 0 6682 /* Sibling calls use a plain branch. I don't know a way 6683 of deciding whether a branch is really a sibling call. */ 6684 || !branch_ok)) 6685 { 6686 ret = 1; 6687 break; 6688 } 6689 } 6690 6691 if (elf_section_data (isec)->this_hdr.contents != contents) 6692 free (contents); 6693 return ret; 6694 } 6695 6696 /* The linker repeatedly calls this function for each input section, 6697 in the order that input sections are linked into output sections. 6698 Build lists of input sections to determine groupings between which 6699 we may insert linker stubs. */ 6700 6701 bfd_boolean 6702 ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec) 6703 { 6704 struct ppc_link_hash_table *htab = ppc_hash_table (info); 6705 int ret; 6706 6707 if ((isec->output_section->flags & SEC_CODE) != 0 6708 && isec->output_section->index <= htab->top_index) 6709 { 6710 asection **list = htab->input_list + isec->output_section->index; 6711 /* Steal the link_sec pointer for our list. */ 6712 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) 6713 /* This happens to make the list in reverse order, 6714 which is what we want. */ 6715 PREV_SEC (isec) = *list; 6716 *list = isec; 6717 } 6718 6719 /* If a code section has a function that uses the TOC then we need 6720 to use the right TOC (obviously). Also, make sure that .opd gets 6721 the correct TOC value for R_PPC64_TOC relocs that don't have or 6722 can't find their function symbol (shouldn't ever happen now). */ 6723 if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0) 6724 { 6725 if (elf_gp (isec->owner) != 0) 6726 htab->toc_curr = elf_gp (isec->owner); 6727 } 6728 else if ((ret = toc_adjusting_stub_needed (info, isec)) < 0) 6729 return FALSE; 6730 else 6731 isec->has_gp_reloc = ret; 6732 6733 /* Functions that don't use the TOC can belong in any TOC group. 6734 Use the last TOC base. This happens to make _init and _fini 6735 pasting work. */ 6736 htab->stub_group[isec->id].toc_off = htab->toc_curr; 6737 return TRUE; 6738 } 6739 6740 /* See whether we can group stub sections together. Grouping stub 6741 sections may result in fewer stubs. More importantly, we need to 6742 put all .init* and .fini* stubs at the beginning of the .init or 6743 .fini output sections respectively, because glibc splits the 6744 _init and _fini functions into multiple parts. Putting a stub in 6745 the middle of a function is not a good idea. */ 6746 6747 static void 6748 group_sections (struct ppc_link_hash_table *htab, 6749 bfd_size_type stub_group_size, 6750 bfd_boolean stubs_always_before_branch) 6751 { 6752 asection **list = htab->input_list + htab->top_index; 6753 do 6754 { 6755 asection *tail = *list; 6756 while (tail != NULL) 6757 { 6758 asection *curr; 6759 asection *prev; 6760 bfd_size_type total; 6761 bfd_boolean big_sec; 6762 bfd_vma curr_toc; 6763 6764 curr = tail; 6765 if (tail->_cooked_size) 6766 total = tail->_cooked_size; 6767 else 6768 total = tail->_raw_size; 6769 big_sec = total >= stub_group_size; 6770 curr_toc = htab->stub_group[tail->id].toc_off; 6771 6772 while ((prev = PREV_SEC (curr)) != NULL 6773 && ((total += curr->output_offset - prev->output_offset) 6774 < stub_group_size) 6775 && htab->stub_group[prev->id].toc_off == curr_toc) 6776 curr = prev; 6777 6778 /* OK, the size from the start of CURR to the end is less 6779 than stub_group_size and thus can be handled by one stub 6780 section. (or the tail section is itself larger than 6781 stub_group_size, in which case we may be toast.) We 6782 should really be keeping track of the total size of stubs 6783 added here, as stubs contribute to the final output 6784 section size. That's a little tricky, and this way will 6785 only break if stubs added make the total size more than 6786 2^25, ie. for the default stub_group_size, if stubs total 6787 more than 2097152 bytes, or nearly 75000 plt call stubs. */ 6788 do 6789 { 6790 prev = PREV_SEC (tail); 6791 /* Set up this stub group. */ 6792 htab->stub_group[tail->id].link_sec = curr; 6793 } 6794 while (tail != curr && (tail = prev) != NULL); 6795 6796 /* But wait, there's more! Input sections up to stub_group_size 6797 bytes before the stub section can be handled by it too. 6798 Don't do this if we have a really large section after the 6799 stubs, as adding more stubs increases the chance that 6800 branches may not reach into the stub section. */ 6801 if (!stubs_always_before_branch && !big_sec) 6802 { 6803 total = 0; 6804 while (prev != NULL 6805 && ((total += tail->output_offset - prev->output_offset) 6806 < stub_group_size) 6807 && htab->stub_group[prev->id].toc_off == curr_toc) 6808 { 6809 tail = prev; 6810 prev = PREV_SEC (tail); 6811 htab->stub_group[tail->id].link_sec = curr; 6812 } 6813 } 6814 tail = prev; 6815 } 6816 } 6817 while (list-- != htab->input_list); 6818 free (htab->input_list); 6819 #undef PREV_SEC 6820 } 6821 6822 /* Determine and set the size of the stub section for a final link. 6823 6824 The basic idea here is to examine all the relocations looking for 6825 PC-relative calls to a target that is unreachable with a "bl" 6826 instruction. */ 6827 6828 bfd_boolean 6829 ppc64_elf_size_stubs (bfd *output_bfd, 6830 struct bfd_link_info *info, 6831 bfd_signed_vma group_size, 6832 asection *(*add_stub_section) (const char *, asection *), 6833 void (*layout_sections_again) (void)) 6834 { 6835 bfd_size_type stub_group_size; 6836 bfd_boolean stubs_always_before_branch; 6837 struct ppc_link_hash_table *htab = ppc_hash_table (info); 6838 6839 /* Stash our params away. */ 6840 htab->add_stub_section = add_stub_section; 6841 htab->layout_sections_again = layout_sections_again; 6842 stubs_always_before_branch = group_size < 0; 6843 if (group_size < 0) 6844 stub_group_size = -group_size; 6845 else 6846 stub_group_size = group_size; 6847 if (stub_group_size == 1) 6848 { 6849 /* Default values. */ 6850 if (stubs_always_before_branch) 6851 { 6852 stub_group_size = 0x1e00000; 6853 if (htab->has_14bit_branch) 6854 stub_group_size = 0x7800; 6855 } 6856 else 6857 { 6858 stub_group_size = 0x1c00000; 6859 if (htab->has_14bit_branch) 6860 stub_group_size = 0x7000; 6861 } 6862 } 6863 6864 group_sections (htab, stub_group_size, stubs_always_before_branch); 6865 6866 while (1) 6867 { 6868 bfd *input_bfd; 6869 unsigned int bfd_indx; 6870 asection *stub_sec; 6871 bfd_boolean stub_changed; 6872 6873 htab->stub_iteration += 1; 6874 stub_changed = FALSE; 6875 6876 for (input_bfd = info->input_bfds, bfd_indx = 0; 6877 input_bfd != NULL; 6878 input_bfd = input_bfd->link_next, bfd_indx++) 6879 { 6880 Elf_Internal_Shdr *symtab_hdr; 6881 asection *section; 6882 Elf_Internal_Sym *local_syms = NULL; 6883 6884 /* We'll need the symbol table in a second. */ 6885 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 6886 if (symtab_hdr->sh_info == 0) 6887 continue; 6888 6889 /* Walk over each section attached to the input bfd. */ 6890 for (section = input_bfd->sections; 6891 section != NULL; 6892 section = section->next) 6893 { 6894 Elf_Internal_Rela *internal_relocs, *irelaend, *irela; 6895 6896 /* If there aren't any relocs, then there's nothing more 6897 to do. */ 6898 if ((section->flags & SEC_RELOC) == 0 6899 || section->reloc_count == 0) 6900 continue; 6901 6902 /* If this section is a link-once section that will be 6903 discarded, then don't create any stubs. */ 6904 if (section->output_section == NULL 6905 || section->output_section->owner != output_bfd) 6906 continue; 6907 6908 /* Get the relocs. */ 6909 internal_relocs 6910 = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, 6911 info->keep_memory); 6912 if (internal_relocs == NULL) 6913 goto error_ret_free_local; 6914 6915 /* Now examine each relocation. */ 6916 irela = internal_relocs; 6917 irelaend = irela + section->reloc_count; 6918 for (; irela < irelaend; irela++) 6919 { 6920 enum elf_ppc64_reloc_type r_type; 6921 unsigned int r_indx; 6922 enum ppc_stub_type stub_type; 6923 struct ppc_stub_hash_entry *stub_entry; 6924 asection *sym_sec; 6925 bfd_vma sym_value; 6926 bfd_vma destination; 6927 struct ppc_link_hash_entry *hash; 6928 struct elf_link_hash_entry *h; 6929 Elf_Internal_Sym *sym; 6930 char *stub_name; 6931 const asection *id_sec; 6932 6933 r_type = ELF64_R_TYPE (irela->r_info); 6934 r_indx = ELF64_R_SYM (irela->r_info); 6935 6936 if (r_type >= R_PPC64_max) 6937 { 6938 bfd_set_error (bfd_error_bad_value); 6939 goto error_ret_free_internal; 6940 } 6941 6942 /* Only look for stubs on branch instructions. */ 6943 if (r_type != R_PPC64_REL24 6944 && r_type != R_PPC64_REL14 6945 && r_type != R_PPC64_REL14_BRTAKEN 6946 && r_type != R_PPC64_REL14_BRNTAKEN) 6947 continue; 6948 6949 /* Now determine the call target, its name, value, 6950 section. */ 6951 destination = 0; 6952 if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, 6953 r_indx, input_bfd)) 6954 goto error_ret_free_internal; 6955 hash = (struct ppc_link_hash_entry *) h; 6956 6957 if (hash == NULL) 6958 { 6959 /* It's a local symbol. */ 6960 sym_value = sym->st_value; 6961 destination = (sym_value + irela->r_addend 6962 + sym_sec->output_offset 6963 + sym_sec->output_section->vma); 6964 } 6965 else 6966 { 6967 /* It's an external symbol. */ 6968 sym_value = 0; 6969 if (hash->elf.root.type == bfd_link_hash_defined 6970 || hash->elf.root.type == bfd_link_hash_defweak) 6971 { 6972 sym_value = hash->elf.root.u.def.value; 6973 if (sym_sec->output_section != NULL) 6974 destination = (sym_value + irela->r_addend 6975 + sym_sec->output_offset 6976 + sym_sec->output_section->vma); 6977 } 6978 else if (hash->elf.root.type == bfd_link_hash_undefweak) 6979 ; 6980 else if (hash->elf.root.type == bfd_link_hash_undefined) 6981 ; 6982 else 6983 { 6984 bfd_set_error (bfd_error_bad_value); 6985 goto error_ret_free_internal; 6986 } 6987 } 6988 6989 /* Determine what (if any) linker stub is needed. */ 6990 stub_type = ppc_type_of_stub (section, irela, &hash, 6991 destination); 6992 6993 if (stub_type != ppc_stub_plt_call) 6994 { 6995 /* Check whether we need a TOC adjusting stub. 6996 Since the linker pastes together pieces from 6997 different object files when creating the 6998 _init and _fini functions, it may be that a 6999 call to what looks like a local sym is in 7000 fact a call needing a TOC adjustment. */ 7001 if (sym_sec != NULL 7002 && sym_sec->output_section != NULL 7003 && (htab->stub_group[sym_sec->id].toc_off 7004 != htab->stub_group[section->id].toc_off) 7005 && sym_sec->has_gp_reloc 7006 && section->has_gp_reloc) 7007 stub_type = ppc_stub_long_branch_r2off; 7008 } 7009 7010 if (stub_type == ppc_stub_none) 7011 continue; 7012 7013 /* __tls_get_addr calls might be eliminated. */ 7014 if (stub_type != ppc_stub_plt_call 7015 && hash != NULL 7016 && &hash->elf == htab->tls_get_addr 7017 && section->has_tls_reloc 7018 && irela != internal_relocs) 7019 { 7020 /* Get tls info. */ 7021 char *tls_mask; 7022 7023 if (!get_tls_mask (&tls_mask, NULL, &local_syms, 7024 irela - 1, input_bfd)) 7025 goto error_ret_free_internal; 7026 if (*tls_mask != 0) 7027 continue; 7028 } 7029 7030 /* Support for grouping stub sections. */ 7031 id_sec = htab->stub_group[section->id].link_sec; 7032 7033 /* Get the name of this stub. */ 7034 stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); 7035 if (!stub_name) 7036 goto error_ret_free_internal; 7037 7038 stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, 7039 stub_name, FALSE, FALSE); 7040 if (stub_entry != NULL) 7041 { 7042 /* The proper stub has already been created. */ 7043 free (stub_name); 7044 continue; 7045 } 7046 7047 stub_entry = ppc_add_stub (stub_name, section, htab); 7048 if (stub_entry == NULL) 7049 { 7050 free (stub_name); 7051 error_ret_free_internal: 7052 if (elf_section_data (section)->relocs == NULL) 7053 free (internal_relocs); 7054 error_ret_free_local: 7055 if (local_syms != NULL 7056 && (symtab_hdr->contents 7057 != (unsigned char *) local_syms)) 7058 free (local_syms); 7059 return FALSE; 7060 } 7061 7062 stub_entry->stub_type = stub_type; 7063 stub_entry->target_value = sym_value; 7064 stub_entry->target_section = sym_sec; 7065 stub_entry->h = hash; 7066 stub_entry->addend = irela->r_addend; 7067 stub_changed = TRUE; 7068 } 7069 7070 /* We're done with the internal relocs, free them. */ 7071 if (elf_section_data (section)->relocs != internal_relocs) 7072 free (internal_relocs); 7073 } 7074 7075 if (local_syms != NULL 7076 && symtab_hdr->contents != (unsigned char *) local_syms) 7077 { 7078 if (!info->keep_memory) 7079 free (local_syms); 7080 else 7081 symtab_hdr->contents = (unsigned char *) local_syms; 7082 } 7083 } 7084 7085 if (!stub_changed) 7086 break; 7087 7088 /* OK, we've added some stubs. Find out the new size of the 7089 stub sections. */ 7090 for (stub_sec = htab->stub_bfd->sections; 7091 stub_sec != NULL; 7092 stub_sec = stub_sec->next) 7093 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 7094 { 7095 stub_sec->_raw_size = 0; 7096 stub_sec->_cooked_size = 0; 7097 } 7098 htab->brlt->_raw_size = 0; 7099 htab->brlt->_cooked_size = 0; 7100 if (info->shared) 7101 { 7102 htab->relbrlt->_raw_size = 0; 7103 htab->relbrlt->_cooked_size = 0; 7104 } 7105 7106 bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info); 7107 7108 /* Ask the linker to do its stuff. */ 7109 (*htab->layout_sections_again) (); 7110 } 7111 7112 /* It would be nice to strip .branch_lt from the output if the 7113 section is empty, but it's too late. If we strip sections here, 7114 the dynamic symbol table is corrupted since the section symbol 7115 for the stripped section isn't written. */ 7116 7117 return TRUE; 7118 } 7119 7120 /* Called after we have determined section placement. If sections 7121 move, we'll be called again. Provide a value for TOCstart. */ 7122 7123 bfd_vma 7124 ppc64_elf_toc (bfd *obfd) 7125 { 7126 asection *s; 7127 bfd_vma TOCstart; 7128 7129 /* The TOC consists of sections .got, .toc, .tocbss, .plt in that 7130 order. The TOC starts where the first of these sections starts. */ 7131 s = bfd_get_section_by_name (obfd, ".got"); 7132 if (s == NULL) 7133 s = bfd_get_section_by_name (obfd, ".toc"); 7134 if (s == NULL) 7135 s = bfd_get_section_by_name (obfd, ".tocbss"); 7136 if (s == NULL) 7137 s = bfd_get_section_by_name (obfd, ".plt"); 7138 if (s == NULL) 7139 { 7140 /* This may happen for 7141 o references to TOC base (SYM@toc / TOC[tc0]) without a 7142 .toc directive 7143 o bad linker script 7144 o --gc-sections and empty TOC sections 7145 7146 FIXME: Warn user? */ 7147 7148 /* Look for a likely section. We probably won't even be 7149 using TOCstart. */ 7150 for (s = obfd->sections; s != NULL; s = s->next) 7151 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY)) 7152 == (SEC_ALLOC | SEC_SMALL_DATA)) 7153 break; 7154 if (s == NULL) 7155 for (s = obfd->sections; s != NULL; s = s->next) 7156 if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA)) 7157 == (SEC_ALLOC | SEC_SMALL_DATA)) 7158 break; 7159 if (s == NULL) 7160 for (s = obfd->sections; s != NULL; s = s->next) 7161 if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) 7162 break; 7163 if (s == NULL) 7164 for (s = obfd->sections; s != NULL; s = s->next) 7165 if ((s->flags & SEC_ALLOC) == SEC_ALLOC) 7166 break; 7167 } 7168 7169 TOCstart = 0; 7170 if (s != NULL) 7171 TOCstart = s->output_section->vma + s->output_offset; 7172 7173 return TOCstart; 7174 } 7175 7176 /* Build all the stubs associated with the current output file. 7177 The stubs are kept in a hash table attached to the main linker 7178 hash table. This function is called via gldelf64ppc_finish. */ 7179 7180 bfd_boolean 7181 ppc64_elf_build_stubs (bfd_boolean emit_stub_syms, 7182 struct bfd_link_info *info, 7183 char **stats) 7184 { 7185 struct ppc_link_hash_table *htab = ppc_hash_table (info); 7186 asection *stub_sec; 7187 bfd_byte *p; 7188 int stub_sec_count = 0; 7189 7190 htab->emit_stub_syms = emit_stub_syms; 7191 for (stub_sec = htab->stub_bfd->sections; 7192 stub_sec != NULL; 7193 stub_sec = stub_sec->next) 7194 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 7195 { 7196 bfd_size_type size; 7197 7198 /* Allocate memory to hold the linker stubs. */ 7199 size = stub_sec->_raw_size; 7200 if (size != 0) 7201 { 7202 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); 7203 if (stub_sec->contents == NULL) 7204 return FALSE; 7205 } 7206 stub_sec->_cooked_size = 0; 7207 } 7208 7209 if (htab->plt != NULL) 7210 { 7211 unsigned int indx; 7212 bfd_vma plt0; 7213 7214 /* Build the .glink plt call stub. */ 7215 plt0 = (htab->plt->output_section->vma 7216 + htab->plt->output_offset 7217 - (htab->glink->output_section->vma 7218 + htab->glink->output_offset 7219 + GLINK_CALL_STUB_SIZE)); 7220 if (plt0 + 0x80008000 > 0xffffffff) 7221 { 7222 (*_bfd_error_handler) (_(".glink and .plt too far apart")); 7223 bfd_set_error (bfd_error_bad_value); 7224 return FALSE; 7225 } 7226 7227 if (htab->emit_stub_syms) 7228 { 7229 struct elf_link_hash_entry *h; 7230 h = elf_link_hash_lookup (&htab->elf, "__glink", TRUE, FALSE, FALSE); 7231 if (h == NULL) 7232 return FALSE; 7233 if (h->root.type == bfd_link_hash_new) 7234 { 7235 h->root.type = bfd_link_hash_defined; 7236 h->root.u.def.section = htab->glink; 7237 h->root.u.def.value = 0; 7238 h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR 7239 | ELF_LINK_HASH_DEF_REGULAR 7240 | ELF_LINK_HASH_REF_REGULAR_NONWEAK 7241 | ELF_LINK_FORCED_LOCAL); 7242 } 7243 } 7244 p = htab->glink->contents; 7245 bfd_put_32 (htab->glink->owner, MFCTR_R12, p); 7246 p += 4; 7247 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_3, p); 7248 p += 4; 7249 bfd_put_32 (htab->glink->owner, ADDIC_R2_R0_32K, p); 7250 p += 4; 7251 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p); 7252 p += 4; 7253 bfd_put_32 (htab->glink->owner, SRADI_R2_R2_63, p); 7254 p += 4; 7255 bfd_put_32 (htab->glink->owner, SLDI_R11_R0_2, p); 7256 p += 4; 7257 bfd_put_32 (htab->glink->owner, AND_R2_R2_R11, p); 7258 p += 4; 7259 bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p); 7260 p += 4; 7261 bfd_put_32 (htab->glink->owner, ADD_R12_R12_R2, p); 7262 p += 4; 7263 bfd_put_32 (htab->glink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p); 7264 p += 4; 7265 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | PPC_LO (plt0), p); 7266 p += 4; 7267 bfd_put_32 (htab->glink->owner, ADDI_R12_R12 | PPC_LO (plt0), p); 7268 p += 4; 7269 bfd_put_32 (htab->glink->owner, LD_R2_0R12 | 8, p); 7270 p += 4; 7271 bfd_put_32 (htab->glink->owner, MTCTR_R11, p); 7272 p += 4; 7273 bfd_put_32 (htab->glink->owner, LD_R11_0R12 | 16, p); 7274 p += 4; 7275 bfd_put_32 (htab->glink->owner, BCTR, p); 7276 p += 4; 7277 7278 /* Build the .glink lazy link call stubs. */ 7279 indx = 0; 7280 while (p < htab->glink->contents + htab->glink->_raw_size) 7281 { 7282 if (indx < 0x8000) 7283 { 7284 bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p); 7285 p += 4; 7286 } 7287 else 7288 { 7289 bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p); 7290 p += 4; 7291 bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), p); 7292 p += 4; 7293 } 7294 bfd_put_32 (htab->glink->owner, 7295 B_DOT | ((htab->glink->contents - p) & 0x3fffffc), p); 7296 indx++; 7297 p += 4; 7298 } 7299 htab->glink->_cooked_size = p - htab->glink->contents; 7300 } 7301 7302 if (htab->brlt->_raw_size != 0) 7303 { 7304 htab->brlt->contents = bfd_zalloc (htab->brlt->owner, 7305 htab->brlt->_raw_size); 7306 if (htab->brlt->contents == NULL) 7307 return FALSE; 7308 } 7309 if (info->shared && htab->relbrlt->_raw_size != 0) 7310 { 7311 htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner, 7312 htab->relbrlt->_raw_size); 7313 if (htab->relbrlt->contents == NULL) 7314 return FALSE; 7315 } 7316 7317 /* Build the stubs as directed by the stub hash table. */ 7318 bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); 7319 7320 for (stub_sec = htab->stub_bfd->sections; 7321 stub_sec != NULL; 7322 stub_sec = stub_sec->next) 7323 if ((stub_sec->flags & SEC_LINKER_CREATED) == 0) 7324 { 7325 stub_sec_count += 1; 7326 if (stub_sec->_raw_size != stub_sec->_cooked_size) 7327 break; 7328 } 7329 7330 if (stub_sec != NULL 7331 || htab->glink->_raw_size != htab->glink->_cooked_size) 7332 { 7333 htab->stub_error = TRUE; 7334 (*_bfd_error_handler) (_("stubs don't match calculated size")); 7335 } 7336 7337 if (htab->stub_error) 7338 return FALSE; 7339 7340 if (stats != NULL) 7341 { 7342 *stats = bfd_malloc (500); 7343 if (*stats == NULL) 7344 return FALSE; 7345 7346 sprintf (*stats, _("linker stubs in %u groups\n" 7347 " branch %lu\n" 7348 " toc adjust %lu\n" 7349 " long branch %lu\n" 7350 " long toc adj %lu\n" 7351 " plt call %lu"), 7352 stub_sec_count, 7353 htab->stub_count[ppc_stub_long_branch - 1], 7354 htab->stub_count[ppc_stub_long_branch_r2off - 1], 7355 htab->stub_count[ppc_stub_plt_branch - 1], 7356 htab->stub_count[ppc_stub_plt_branch_r2off - 1], 7357 htab->stub_count[ppc_stub_plt_call - 1]); 7358 } 7359 return TRUE; 7360 } 7361 7362 /* The RELOCATE_SECTION function is called by the ELF backend linker 7363 to handle the relocations for a section. 7364 7365 The relocs are always passed as Rela structures; if the section 7366 actually uses Rel structures, the r_addend field will always be 7367 zero. 7368 7369 This function is responsible for adjust the section contents as 7370 necessary, and (if using Rela relocs and generating a 7371 relocatable output file) adjusting the reloc addend as 7372 necessary. 7373 7374 This function does not have to worry about setting the reloc 7375 address or the reloc symbol index. 7376 7377 LOCAL_SYMS is a pointer to the swapped in local symbols. 7378 7379 LOCAL_SECTIONS is an array giving the section in the input file 7380 corresponding to the st_shndx field of each local symbol. 7381 7382 The global hash table entry for the global symbols can be found 7383 via elf_sym_hashes (input_bfd). 7384 7385 When generating relocatable output, this function must handle 7386 STB_LOCAL/STT_SECTION symbols specially. The output symbol is 7387 going to be the section symbol corresponding to the output 7388 section, which means that the addend must be adjusted 7389 accordingly. */ 7390 7391 static bfd_boolean 7392 ppc64_elf_relocate_section (bfd *output_bfd, 7393 struct bfd_link_info *info, 7394 bfd *input_bfd, 7395 asection *input_section, 7396 bfd_byte *contents, 7397 Elf_Internal_Rela *relocs, 7398 Elf_Internal_Sym *local_syms, 7399 asection **local_sections) 7400 { 7401 struct ppc_link_hash_table *htab; 7402 Elf_Internal_Shdr *symtab_hdr; 7403 struct elf_link_hash_entry **sym_hashes; 7404 Elf_Internal_Rela *rel; 7405 Elf_Internal_Rela *relend; 7406 Elf_Internal_Rela outrel; 7407 bfd_byte *loc; 7408 struct got_entry **local_got_ents; 7409 bfd_vma TOCstart; 7410 bfd_boolean ret = TRUE; 7411 bfd_boolean is_opd; 7412 /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ 7413 bfd_boolean is_power4 = FALSE; 7414 7415 if (info->relocatable) 7416 return TRUE; 7417 7418 /* Initialize howto table if needed. */ 7419 if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) 7420 ppc_howto_init (); 7421 7422 htab = ppc_hash_table (info); 7423 local_got_ents = elf_local_got_ents (input_bfd); 7424 TOCstart = elf_gp (output_bfd); 7425 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; 7426 sym_hashes = elf_sym_hashes (input_bfd); 7427 is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL; 7428 7429 rel = relocs; 7430 relend = relocs + input_section->reloc_count; 7431 for (; rel < relend; rel++) 7432 { 7433 enum elf_ppc64_reloc_type r_type; 7434 bfd_vma addend; 7435 bfd_reloc_status_type r; 7436 Elf_Internal_Sym *sym; 7437 asection *sec; 7438 struct elf_link_hash_entry *h; 7439 struct elf_link_hash_entry *fdh; 7440 const char *sym_name; 7441 unsigned long r_symndx, toc_symndx; 7442 char tls_mask, tls_gd, tls_type; 7443 char sym_type; 7444 bfd_vma relocation; 7445 bfd_boolean unresolved_reloc; 7446 bfd_boolean warned; 7447 unsigned long insn, mask; 7448 struct ppc_stub_hash_entry *stub_entry; 7449 bfd_vma max_br_offset; 7450 bfd_vma from; 7451 7452 r_type = ELF64_R_TYPE (rel->r_info); 7453 r_symndx = ELF64_R_SYM (rel->r_info); 7454 7455 /* For old style R_PPC64_TOC relocs with a zero symbol, use the 7456 symbol of the previous ADDR64 reloc. The symbol gives us the 7457 proper TOC base to use. */ 7458 if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC) 7459 && rel != relocs 7460 && ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_ADDR64 7461 && is_opd) 7462 r_symndx = ELF64_R_SYM (rel[-1].r_info); 7463 7464 sym = NULL; 7465 sec = NULL; 7466 h = NULL; 7467 sym_name = NULL; 7468 unresolved_reloc = FALSE; 7469 warned = FALSE; 7470 7471 if (r_symndx < symtab_hdr->sh_info) 7472 { 7473 /* It's a local symbol. */ 7474 sym = local_syms + r_symndx; 7475 sec = local_sections[r_symndx]; 7476 sym_name = bfd_elf_local_sym_name (input_bfd, sym); 7477 sym_type = ELF64_ST_TYPE (sym->st_info); 7478 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); 7479 if (elf_section_data (sec) != NULL) 7480 { 7481 long *opd_sym_adjust; 7482 7483 opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust; 7484 if (opd_sym_adjust != NULL) 7485 relocation += opd_sym_adjust[sym->st_value / 24]; 7486 } 7487 } 7488 else 7489 { 7490 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, 7491 r_symndx, symtab_hdr, sym_hashes, 7492 h, sec, relocation, 7493 unresolved_reloc, warned); 7494 sym_name = h->root.root.string; 7495 sym_type = h->type; 7496 } 7497 7498 /* TLS optimizations. Replace instruction sequences and relocs 7499 based on information we collected in tls_optimize. We edit 7500 RELOCS so that --emit-relocs will output something sensible 7501 for the final instruction stream. */ 7502 tls_mask = 0; 7503 tls_gd = 0; 7504 toc_symndx = 0; 7505 if (IS_PPC64_TLS_RELOC (r_type)) 7506 { 7507 if (h != NULL) 7508 tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask; 7509 else if (local_got_ents != NULL) 7510 { 7511 char *lgot_masks; 7512 lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info); 7513 tls_mask = lgot_masks[r_symndx]; 7514 } 7515 if (tls_mask == 0 && r_type == R_PPC64_TLS) 7516 { 7517 /* Check for toc tls entries. */ 7518 char *toc_tls; 7519 7520 if (!get_tls_mask (&toc_tls, &toc_symndx, &local_syms, 7521 rel, input_bfd)) 7522 return FALSE; 7523 7524 if (toc_tls) 7525 tls_mask = *toc_tls; 7526 } 7527 } 7528 7529 /* Check that tls relocs are used with tls syms, and non-tls 7530 relocs are used with non-tls syms. */ 7531 if (r_symndx != 0 7532 && r_type != R_PPC64_NONE 7533 && (h == NULL 7534 || h->root.type == bfd_link_hash_defined 7535 || h->root.type == bfd_link_hash_defweak) 7536 && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS)) 7537 { 7538 if (r_type == R_PPC64_TLS && tls_mask != 0) 7539 /* R_PPC64_TLS is OK against a symbol in the TOC. */ 7540 ; 7541 else 7542 (*_bfd_error_handler) 7543 (sym_type == STT_TLS 7544 ? _("%s(%s+0x%lx): %s used with TLS symbol %s") 7545 : _("%s(%s+0x%lx): %s used with non-TLS symbol %s"), 7546 bfd_archive_filename (input_bfd), 7547 input_section->name, 7548 (long) rel->r_offset, 7549 ppc64_elf_howto_table[r_type]->name, 7550 sym_name); 7551 } 7552 7553 /* Ensure reloc mapping code below stays sane. */ 7554 if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1 7555 || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1 7556 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3) 7557 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3) 7558 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3) 7559 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3) 7560 || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3) 7561 || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3) 7562 || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3) 7563 || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3)) 7564 abort (); 7565 7566 switch (r_type) 7567 { 7568 default: 7569 break; 7570 7571 case R_PPC64_TOC16: 7572 case R_PPC64_TOC16_LO: 7573 case R_PPC64_TOC16_DS: 7574 case R_PPC64_TOC16_LO_DS: 7575 { 7576 /* Check for toc tls entries. */ 7577 char *toc_tls; 7578 int retval; 7579 7580 retval = get_tls_mask (&toc_tls, &toc_symndx, &local_syms, 7581 rel, input_bfd); 7582 if (retval == 0) 7583 return FALSE; 7584 7585 if (toc_tls) 7586 { 7587 tls_mask = *toc_tls; 7588 if (r_type == R_PPC64_TOC16_DS 7589 || r_type == R_PPC64_TOC16_LO_DS) 7590 { 7591 if (tls_mask != 0 7592 && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0) 7593 goto toctprel; 7594 } 7595 else 7596 { 7597 /* If we found a GD reloc pair, then we might be 7598 doing a GD->IE transition. */ 7599 if (retval == 2) 7600 { 7601 tls_gd = TLS_TPRELGD; 7602 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 7603 goto tls_get_addr_check; 7604 } 7605 else if (retval == 3) 7606 { 7607 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 7608 goto tls_get_addr_check; 7609 } 7610 } 7611 } 7612 } 7613 break; 7614 7615 case R_PPC64_GOT_TPREL16_DS: 7616 case R_PPC64_GOT_TPREL16_LO_DS: 7617 if (tls_mask != 0 7618 && (tls_mask & TLS_TPREL) == 0) 7619 { 7620 toctprel: 7621 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2); 7622 insn &= 31 << 21; 7623 insn |= 0x3c0d0000; /* addis 0,13,0 */ 7624 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2); 7625 r_type = R_PPC64_TPREL16_HA; 7626 if (toc_symndx != 0) 7627 { 7628 rel->r_info = ELF64_R_INFO (toc_symndx, r_type); 7629 /* We changed the symbol. Start over in order to 7630 get h, sym, sec etc. right. */ 7631 rel--; 7632 continue; 7633 } 7634 else 7635 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 7636 } 7637 break; 7638 7639 case R_PPC64_TLS: 7640 if (tls_mask != 0 7641 && (tls_mask & TLS_TPREL) == 0) 7642 { 7643 bfd_vma rtra; 7644 insn = bfd_get_32 (output_bfd, contents + rel->r_offset); 7645 if ((insn & ((0x3f << 26) | (31 << 11))) 7646 == ((31 << 26) | (13 << 11))) 7647 rtra = insn & ((1 << 26) - (1 << 16)); 7648 else if ((insn & ((0x3f << 26) | (31 << 16))) 7649 == ((31 << 26) | (13 << 16))) 7650 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5); 7651 else 7652 abort (); 7653 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1) 7654 /* add -> addi. */ 7655 insn = 14 << 26; 7656 else if ((insn & (31 << 1)) == 23 << 1 7657 && ((insn & (31 << 6)) < 14 << 6 7658 || ((insn & (31 << 6)) >= 16 << 6 7659 && (insn & (31 << 6)) < 24 << 6))) 7660 /* load and store indexed -> dform. */ 7661 insn = (32 | ((insn >> 6) & 31)) << 26; 7662 else if ((insn & (31 << 1)) == 21 << 1 7663 && (insn & (0x1a << 6)) == 0) 7664 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ 7665 insn = (((58 | ((insn >> 6) & 4)) << 26) 7666 | ((insn >> 6) & 1)); 7667 else if ((insn & (31 << 1)) == 21 << 1 7668 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1) 7669 /* lwax -> lwa. */ 7670 insn = (58 << 26) | 2; 7671 else 7672 abort (); 7673 insn |= rtra; 7674 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 7675 /* Was PPC64_TLS which sits on insn boundary, now 7676 PPC64_TPREL16_LO which is at insn+2. */ 7677 rel->r_offset += 2; 7678 r_type = R_PPC64_TPREL16_LO; 7679 if (toc_symndx != 0) 7680 { 7681 rel->r_info = ELF64_R_INFO (toc_symndx, r_type); 7682 /* We changed the symbol. Start over in order to 7683 get h, sym, sec etc. right. */ 7684 rel--; 7685 continue; 7686 } 7687 else 7688 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 7689 } 7690 break; 7691 7692 case R_PPC64_GOT_TLSGD16_HI: 7693 case R_PPC64_GOT_TLSGD16_HA: 7694 tls_gd = TLS_TPRELGD; 7695 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 7696 goto tls_gdld_hi; 7697 break; 7698 7699 case R_PPC64_GOT_TLSLD16_HI: 7700 case R_PPC64_GOT_TLSLD16_HA: 7701 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 7702 { 7703 tls_gdld_hi: 7704 if ((tls_mask & tls_gd) != 0) 7705 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) 7706 + R_PPC64_GOT_TPREL16_DS); 7707 else 7708 { 7709 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); 7710 rel->r_offset -= 2; 7711 r_type = R_PPC64_NONE; 7712 } 7713 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 7714 } 7715 break; 7716 7717 case R_PPC64_GOT_TLSGD16: 7718 case R_PPC64_GOT_TLSGD16_LO: 7719 tls_gd = TLS_TPRELGD; 7720 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) 7721 goto tls_get_addr_check; 7722 break; 7723 7724 case R_PPC64_GOT_TLSLD16: 7725 case R_PPC64_GOT_TLSLD16_LO: 7726 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) 7727 { 7728 tls_get_addr_check: 7729 if (rel + 1 < relend) 7730 { 7731 enum elf_ppc64_reloc_type r_type2; 7732 unsigned long r_symndx2; 7733 struct elf_link_hash_entry *h2; 7734 bfd_vma insn1, insn2, insn3; 7735 bfd_vma offset; 7736 7737 /* The next instruction should be a call to 7738 __tls_get_addr. Peek at the reloc to be sure. */ 7739 r_type2 = ELF64_R_TYPE (rel[1].r_info); 7740 r_symndx2 = ELF64_R_SYM (rel[1].r_info); 7741 if (r_symndx2 < symtab_hdr->sh_info 7742 || (r_type2 != R_PPC64_REL14 7743 && r_type2 != R_PPC64_REL14_BRTAKEN 7744 && r_type2 != R_PPC64_REL14_BRNTAKEN 7745 && r_type2 != R_PPC64_REL24)) 7746 break; 7747 7748 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info]; 7749 while (h2->root.type == bfd_link_hash_indirect 7750 || h2->root.type == bfd_link_hash_warning) 7751 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link; 7752 if (h2 == NULL || h2 != htab->tls_get_addr) 7753 break; 7754 7755 /* OK, it checks out. Replace the call. */ 7756 offset = rel[1].r_offset; 7757 insn1 = bfd_get_32 (output_bfd, 7758 contents + rel->r_offset - 2); 7759 insn3 = bfd_get_32 (output_bfd, 7760 contents + offset + 4); 7761 if ((tls_mask & tls_gd) != 0) 7762 { 7763 /* IE */ 7764 insn1 &= (1 << 26) - (1 << 2); 7765 insn1 |= 58 << 26; /* ld */ 7766 insn2 = 0x7c636a14; /* add 3,3,13 */ 7767 rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE); 7768 if ((tls_mask & TLS_EXPLICIT) == 0) 7769 r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) 7770 + R_PPC64_GOT_TPREL16_DS); 7771 else 7772 r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16; 7773 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 7774 } 7775 else 7776 { 7777 /* LE */ 7778 insn1 = 0x3c6d0000; /* addis 3,13,0 */ 7779 insn2 = 0x38630000; /* addi 3,3,0 */ 7780 if (tls_gd == 0) 7781 { 7782 /* Was an LD reloc. */ 7783 r_symndx = 0; 7784 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 7785 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; 7786 } 7787 else if (toc_symndx != 0) 7788 r_symndx = toc_symndx; 7789 r_type = R_PPC64_TPREL16_HA; 7790 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 7791 rel[1].r_info = ELF64_R_INFO (r_symndx, 7792 R_PPC64_TPREL16_LO); 7793 rel[1].r_offset += 2; 7794 } 7795 if (insn3 == NOP 7796 || insn3 == CROR_151515 || insn3 == CROR_313131) 7797 { 7798 insn3 = insn2; 7799 insn2 = NOP; 7800 rel[1].r_offset += 4; 7801 } 7802 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2); 7803 bfd_put_32 (output_bfd, insn2, contents + offset); 7804 bfd_put_32 (output_bfd, insn3, contents + offset + 4); 7805 if (tls_gd == 0 || toc_symndx != 0) 7806 { 7807 /* We changed the symbol. Start over in order 7808 to get h, sym, sec etc. right. */ 7809 rel--; 7810 continue; 7811 } 7812 } 7813 } 7814 break; 7815 7816 case R_PPC64_DTPMOD64: 7817 if (rel + 1 < relend 7818 && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) 7819 && rel[1].r_offset == rel->r_offset + 8) 7820 { 7821 if ((tls_mask & TLS_GD) == 0) 7822 { 7823 rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE); 7824 if ((tls_mask & TLS_TPRELGD) != 0) 7825 r_type = R_PPC64_TPREL64; 7826 else 7827 { 7828 bfd_put_64 (output_bfd, 1, contents + rel->r_offset); 7829 r_type = R_PPC64_NONE; 7830 } 7831 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 7832 } 7833 } 7834 else 7835 { 7836 if ((tls_mask & TLS_LD) == 0) 7837 { 7838 bfd_put_64 (output_bfd, 1, contents + rel->r_offset); 7839 r_type = R_PPC64_NONE; 7840 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 7841 } 7842 } 7843 break; 7844 7845 case R_PPC64_TPREL64: 7846 if ((tls_mask & TLS_TPREL) == 0) 7847 { 7848 r_type = R_PPC64_NONE; 7849 rel->r_info = ELF64_R_INFO (r_symndx, r_type); 7850 } 7851 break; 7852 } 7853 7854 /* Handle other relocations that tweak non-addend part of insn. */ 7855 insn = 0; 7856 switch (r_type) 7857 { 7858 default: 7859 break; 7860 7861 /* Branch taken prediction relocations. */ 7862 case R_PPC64_ADDR14_BRTAKEN: 7863 case R_PPC64_REL14_BRTAKEN: 7864 insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ 7865 /* Fall thru. */ 7866 7867 /* Branch not taken prediction relocations. */ 7868 case R_PPC64_ADDR14_BRNTAKEN: 7869 case R_PPC64_REL14_BRNTAKEN: 7870 insn |= bfd_get_32 (output_bfd, 7871 contents + rel->r_offset) & ~(0x01 << 21); 7872 if (is_power4) 7873 { 7874 /* Set 'a' bit. This is 0b00010 in BO field for branch 7875 on CR(BI) insns (BO == 001at or 011at), and 0b01000 7876 for branch on CTR insns (BO == 1a00t or 1a01t). */ 7877 if ((insn & (0x14 << 21)) == (0x04 << 21)) 7878 insn |= 0x02 << 21; 7879 else if ((insn & (0x14 << 21)) == (0x10 << 21)) 7880 insn |= 0x08 << 21; 7881 else 7882 break; 7883 } 7884 else 7885 { 7886 from = (rel->r_offset 7887 + input_section->output_offset 7888 + input_section->output_section->vma); 7889 7890 /* Invert 'y' bit if not the default. */ 7891 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) 7892 insn ^= 0x01 << 21; 7893 } 7894 7895 bfd_put_32 (output_bfd, insn, contents + rel->r_offset); 7896 break; 7897 7898 case R_PPC64_REL24: 7899 /* Calls to functions with a different TOC, such as calls to 7900 shared objects, need to alter the TOC pointer. This is 7901 done using a linkage stub. A REL24 branching to these 7902 linkage stubs needs to be followed by a nop, as the nop 7903 will be replaced with an instruction to restore the TOC 7904 base pointer. */ 7905 if (((h != NULL 7906 && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL 7907 && fdh->plt.plist != NULL) 7908 || ((fdh = h, sec) != NULL 7909 && sec->output_section != NULL 7910 && (htab->stub_group[sec->id].toc_off 7911 != htab->stub_group[input_section->id].toc_off))) 7912 && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh, 7913 rel, htab)) != NULL 7914 && (stub_entry->stub_type == ppc_stub_plt_call 7915 || stub_entry->stub_type == ppc_stub_plt_branch_r2off 7916 || stub_entry->stub_type == ppc_stub_long_branch_r2off)) 7917 { 7918 bfd_boolean can_plt_call = 0; 7919 7920 if (rel->r_offset + 8 <= input_section->_cooked_size) 7921 { 7922 insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); 7923 if (insn == NOP 7924 || insn == CROR_151515 || insn == CROR_313131) 7925 { 7926 bfd_put_32 (input_bfd, LD_R2_40R1, 7927 contents + rel->r_offset + 4); 7928 can_plt_call = 1; 7929 } 7930 } 7931 7932 if (!can_plt_call) 7933 { 7934 if (stub_entry->stub_type == ppc_stub_plt_call) 7935 { 7936 /* If this is a plain branch rather than a branch 7937 and link, don't require a nop. */ 7938 insn = bfd_get_32 (input_bfd, contents + rel->r_offset); 7939 if ((insn & 1) == 0) 7940 can_plt_call = 1; 7941 } 7942 else if (h != NULL 7943 && strcmp (h->root.root.string, 7944 ".__libc_start_main") == 0) 7945 { 7946 /* Allow crt1 branch to go via a toc adjusting stub. */ 7947 can_plt_call = 1; 7948 } 7949 else 7950 { 7951 if (strcmp (input_section->output_section->name, 7952 ".init") == 0 7953 || strcmp (input_section->output_section->name, 7954 ".fini") == 0) 7955 (*_bfd_error_handler) 7956 (_("%s(%s+0x%lx): automatic multiple TOCs " 7957 "not supported using your crt files; " 7958 "recompile with -mminimal-toc or upgrade gcc"), 7959 bfd_archive_filename (input_bfd), 7960 input_section->name, 7961 (long) rel->r_offset); 7962 else 7963 (*_bfd_error_handler) 7964 (_("%s(%s+0x%lx): sibling call optimization to `%s' " 7965 "does not allow automatic multiple TOCs; " 7966 "recompile with -mminimal-toc or " 7967 "-fno-optimize-sibling-calls, " 7968 "or make `%s' extern"), 7969 bfd_archive_filename (input_bfd), 7970 input_section->name, 7971 (long) rel->r_offset, 7972 sym_name, 7973 sym_name); 7974 bfd_set_error (bfd_error_bad_value); 7975 ret = FALSE; 7976 } 7977 } 7978 7979 if (can_plt_call) 7980 { 7981 relocation = (stub_entry->stub_offset 7982 + stub_entry->stub_sec->output_offset 7983 + stub_entry->stub_sec->output_section->vma); 7984 if (stub_entry->stub_type == ppc_stub_plt_call) 7985 unresolved_reloc = FALSE; 7986 } 7987 } 7988 7989 if (h != NULL 7990 && h->root.type == bfd_link_hash_undefweak 7991 && relocation == 0 7992 && rel->r_addend == 0) 7993 { 7994 /* Tweak calls to undefined weak functions to point at a 7995 blr. We can thus call a weak function without first 7996 checking whether the function is defined. We have a 7997 blr at the end of .sfpr. */ 7998 BFD_ASSERT (htab->sfpr->_raw_size != 0); 7999 relocation = (htab->sfpr->_raw_size - 4 8000 + htab->sfpr->output_offset 8001 + htab->sfpr->output_section->vma); 8002 from = (rel->r_offset 8003 + input_section->output_offset 8004 + input_section->output_section->vma); 8005 8006 /* But let's not be silly about it. If the blr isn't in 8007 reach, just go to the next instruction. */ 8008 if (relocation - from + (1 << 25) >= (1 << 26) 8009 || htab->sfpr->_raw_size == 0) 8010 relocation = from + 4; 8011 } 8012 break; 8013 } 8014 8015 /* Set `addend'. */ 8016 tls_type = 0; 8017 addend = rel->r_addend; 8018 switch (r_type) 8019 { 8020 default: 8021 (*_bfd_error_handler) 8022 (_("%s: unknown relocation type %d for symbol %s"), 8023 bfd_archive_filename (input_bfd), (int) r_type, sym_name); 8024 8025 bfd_set_error (bfd_error_bad_value); 8026 ret = FALSE; 8027 continue; 8028 8029 case R_PPC64_NONE: 8030 case R_PPC64_TLS: 8031 case R_PPC64_GNU_VTINHERIT: 8032 case R_PPC64_GNU_VTENTRY: 8033 continue; 8034 8035 /* GOT16 relocations. Like an ADDR16 using the symbol's 8036 address in the GOT as relocation value instead of the 8037 symbol's value itself. Also, create a GOT entry for the 8038 symbol and put the symbol value there. */ 8039 case R_PPC64_GOT_TLSGD16: 8040 case R_PPC64_GOT_TLSGD16_LO: 8041 case R_PPC64_GOT_TLSGD16_HI: 8042 case R_PPC64_GOT_TLSGD16_HA: 8043 tls_type = TLS_TLS | TLS_GD; 8044 goto dogot; 8045 8046 case R_PPC64_GOT_TLSLD16: 8047 case R_PPC64_GOT_TLSLD16_LO: 8048 case R_PPC64_GOT_TLSLD16_HI: 8049 case R_PPC64_GOT_TLSLD16_HA: 8050 tls_type = TLS_TLS | TLS_LD; 8051 goto dogot; 8052 8053 case R_PPC64_GOT_TPREL16_DS: 8054 case R_PPC64_GOT_TPREL16_LO_DS: 8055 case R_PPC64_GOT_TPREL16_HI: 8056 case R_PPC64_GOT_TPREL16_HA: 8057 tls_type = TLS_TLS | TLS_TPREL; 8058 goto dogot; 8059 8060 case R_PPC64_GOT_DTPREL16_DS: 8061 case R_PPC64_GOT_DTPREL16_LO_DS: 8062 case R_PPC64_GOT_DTPREL16_HI: 8063 case R_PPC64_GOT_DTPREL16_HA: 8064 tls_type = TLS_TLS | TLS_DTPREL; 8065 goto dogot; 8066 8067 case R_PPC64_GOT16: 8068 case R_PPC64_GOT16_LO: 8069 case R_PPC64_GOT16_HI: 8070 case R_PPC64_GOT16_HA: 8071 case R_PPC64_GOT16_DS: 8072 case R_PPC64_GOT16_LO_DS: 8073 dogot: 8074 { 8075 /* Relocation is to the entry for this symbol in the global 8076 offset table. */ 8077 asection *got; 8078 bfd_vma *offp; 8079 bfd_vma off; 8080 unsigned long indx = 0; 8081 8082 if (tls_type == (TLS_TLS | TLS_LD) 8083 && (h == NULL 8084 || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))) 8085 offp = &ppc64_tlsld_got (input_bfd)->offset; 8086 else 8087 { 8088 struct got_entry *ent; 8089 8090 if (h != NULL) 8091 { 8092 bfd_boolean dyn = htab->elf.dynamic_sections_created; 8093 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) 8094 || (info->shared 8095 && SYMBOL_REFERENCES_LOCAL (info, h))) 8096 /* This is actually a static link, or it is a 8097 -Bsymbolic link and the symbol is defined 8098 locally, or the symbol was forced to be local 8099 because of a version file. */ 8100 ; 8101 else 8102 { 8103 indx = h->dynindx; 8104 unresolved_reloc = FALSE; 8105 } 8106 ent = h->got.glist; 8107 } 8108 else 8109 { 8110 if (local_got_ents == NULL) 8111 abort (); 8112 ent = local_got_ents[r_symndx]; 8113 } 8114 8115 for (; ent != NULL; ent = ent->next) 8116 if (ent->addend == rel->r_addend 8117 && ent->owner == input_bfd 8118 && ent->tls_type == tls_type) 8119 break; 8120 if (ent == NULL) 8121 abort (); 8122 offp = &ent->got.offset; 8123 } 8124 8125 got = ppc64_elf_tdata (input_bfd)->got; 8126 if (got == NULL) 8127 abort (); 8128 8129 /* The offset must always be a multiple of 8. We use the 8130 least significant bit to record whether we have already 8131 processed this entry. */ 8132 off = *offp; 8133 if ((off & 1) != 0) 8134 off &= ~1; 8135 else 8136 { 8137 /* Generate relocs for the dynamic linker, except in 8138 the case of TLSLD where we'll use one entry per 8139 module. */ 8140 asection *relgot = ppc64_elf_tdata (input_bfd)->relgot; 8141 8142 *offp = off | 1; 8143 if ((info->shared || indx != 0) 8144 && (h == NULL 8145 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 8146 || h->root.type != bfd_link_hash_undefweak)) 8147 { 8148 outrel.r_offset = (got->output_section->vma 8149 + got->output_offset 8150 + off); 8151 outrel.r_addend = rel->r_addend; 8152 if (tls_type & (TLS_LD | TLS_GD)) 8153 { 8154 outrel.r_addend = 0; 8155 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64); 8156 if (tls_type == (TLS_TLS | TLS_GD)) 8157 { 8158 loc = relgot->contents; 8159 loc += (relgot->reloc_count++ 8160 * sizeof (Elf64_External_Rela)); 8161 bfd_elf64_swap_reloca_out (output_bfd, 8162 &outrel, loc); 8163 outrel.r_offset += 8; 8164 outrel.r_addend = rel->r_addend; 8165 outrel.r_info 8166 = ELF64_R_INFO (indx, R_PPC64_DTPREL64); 8167 } 8168 } 8169 else if (tls_type == (TLS_TLS | TLS_DTPREL)) 8170 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64); 8171 else if (tls_type == (TLS_TLS | TLS_TPREL)) 8172 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64); 8173 else if (indx == 0) 8174 { 8175 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE); 8176 8177 /* Write the .got section contents for the sake 8178 of prelink. */ 8179 loc = got->contents + off; 8180 bfd_put_64 (output_bfd, outrel.r_addend + relocation, 8181 loc); 8182 } 8183 else 8184 outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT); 8185 8186 if (indx == 0 && tls_type != (TLS_TLS | TLS_LD)) 8187 { 8188 outrel.r_addend += relocation; 8189 if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL)) 8190 outrel.r_addend -= htab->elf.tls_sec->vma; 8191 } 8192 loc = relgot->contents; 8193 loc += (relgot->reloc_count++ 8194 * sizeof (Elf64_External_Rela)); 8195 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 8196 } 8197 8198 /* Init the .got section contents here if we're not 8199 emitting a reloc. */ 8200 else 8201 { 8202 relocation += rel->r_addend; 8203 if (tls_type == (TLS_TLS | TLS_LD)) 8204 relocation = 1; 8205 else if (tls_type != 0) 8206 { 8207 relocation -= htab->elf.tls_sec->vma + DTP_OFFSET; 8208 if (tls_type == (TLS_TLS | TLS_TPREL)) 8209 relocation += DTP_OFFSET - TP_OFFSET; 8210 8211 if (tls_type == (TLS_TLS | TLS_GD)) 8212 { 8213 bfd_put_64 (output_bfd, relocation, 8214 got->contents + off + 8); 8215 relocation = 1; 8216 } 8217 } 8218 8219 bfd_put_64 (output_bfd, relocation, 8220 got->contents + off); 8221 } 8222 } 8223 8224 if (off >= (bfd_vma) -2) 8225 abort (); 8226 8227 relocation = got->output_offset + off; 8228 8229 /* TOC base (r2) is TOC start plus 0x8000. */ 8230 addend = -TOC_BASE_OFF; 8231 } 8232 break; 8233 8234 case R_PPC64_PLT16_HA: 8235 case R_PPC64_PLT16_HI: 8236 case R_PPC64_PLT16_LO: 8237 case R_PPC64_PLT32: 8238 case R_PPC64_PLT64: 8239 /* Relocation is to the entry for this symbol in the 8240 procedure linkage table. */ 8241 8242 /* Resolve a PLT reloc against a local symbol directly, 8243 without using the procedure linkage table. */ 8244 if (h == NULL) 8245 break; 8246 8247 /* It's possible that we didn't make a PLT entry for this 8248 symbol. This happens when statically linking PIC code, 8249 or when using -Bsymbolic. Go find a match if there is a 8250 PLT entry. */ 8251 if (htab->plt != NULL) 8252 { 8253 struct plt_entry *ent; 8254 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 8255 if (ent->addend == rel->r_addend 8256 && ent->plt.offset != (bfd_vma) -1) 8257 { 8258 relocation = (htab->plt->output_section->vma 8259 + htab->plt->output_offset 8260 + ent->plt.offset); 8261 unresolved_reloc = FALSE; 8262 } 8263 } 8264 break; 8265 8266 case R_PPC64_TOC: 8267 /* Relocation value is TOC base. */ 8268 relocation = TOCstart; 8269 if (r_symndx == 0) 8270 relocation += htab->stub_group[input_section->id].toc_off; 8271 else if (unresolved_reloc) 8272 ; 8273 else if (sec != NULL && sec->id <= htab->top_id) 8274 relocation += htab->stub_group[sec->id].toc_off; 8275 else 8276 unresolved_reloc = TRUE; 8277 goto dodyn2; 8278 8279 /* TOC16 relocs. We want the offset relative to the TOC base, 8280 which is the address of the start of the TOC plus 0x8000. 8281 The TOC consists of sections .got, .toc, .tocbss, and .plt, 8282 in this order. */ 8283 case R_PPC64_TOC16: 8284 case R_PPC64_TOC16_LO: 8285 case R_PPC64_TOC16_HI: 8286 case R_PPC64_TOC16_DS: 8287 case R_PPC64_TOC16_LO_DS: 8288 case R_PPC64_TOC16_HA: 8289 addend -= TOCstart + htab->stub_group[input_section->id].toc_off; 8290 break; 8291 8292 /* Relocate against the beginning of the section. */ 8293 case R_PPC64_SECTOFF: 8294 case R_PPC64_SECTOFF_LO: 8295 case R_PPC64_SECTOFF_HI: 8296 case R_PPC64_SECTOFF_DS: 8297 case R_PPC64_SECTOFF_LO_DS: 8298 case R_PPC64_SECTOFF_HA: 8299 if (sec != NULL) 8300 addend -= sec->output_section->vma; 8301 break; 8302 8303 case R_PPC64_REL14: 8304 case R_PPC64_REL14_BRNTAKEN: 8305 case R_PPC64_REL14_BRTAKEN: 8306 case R_PPC64_REL24: 8307 break; 8308 8309 case R_PPC64_TPREL16: 8310 case R_PPC64_TPREL16_LO: 8311 case R_PPC64_TPREL16_HI: 8312 case R_PPC64_TPREL16_HA: 8313 case R_PPC64_TPREL16_DS: 8314 case R_PPC64_TPREL16_LO_DS: 8315 case R_PPC64_TPREL16_HIGHER: 8316 case R_PPC64_TPREL16_HIGHERA: 8317 case R_PPC64_TPREL16_HIGHEST: 8318 case R_PPC64_TPREL16_HIGHESTA: 8319 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8320 if (info->shared) 8321 /* The TPREL16 relocs shouldn't really be used in shared 8322 libs as they will result in DT_TEXTREL being set, but 8323 support them anyway. */ 8324 goto dodyn; 8325 break; 8326 8327 case R_PPC64_DTPREL16: 8328 case R_PPC64_DTPREL16_LO: 8329 case R_PPC64_DTPREL16_HI: 8330 case R_PPC64_DTPREL16_HA: 8331 case R_PPC64_DTPREL16_DS: 8332 case R_PPC64_DTPREL16_LO_DS: 8333 case R_PPC64_DTPREL16_HIGHER: 8334 case R_PPC64_DTPREL16_HIGHERA: 8335 case R_PPC64_DTPREL16_HIGHEST: 8336 case R_PPC64_DTPREL16_HIGHESTA: 8337 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8338 break; 8339 8340 case R_PPC64_DTPMOD64: 8341 relocation = 1; 8342 addend = 0; 8343 goto dodyn; 8344 8345 case R_PPC64_TPREL64: 8346 addend -= htab->elf.tls_sec->vma + TP_OFFSET; 8347 goto dodyn; 8348 8349 case R_PPC64_DTPREL64: 8350 addend -= htab->elf.tls_sec->vma + DTP_OFFSET; 8351 /* Fall thru */ 8352 8353 /* Relocations that may need to be propagated if this is a 8354 dynamic object. */ 8355 case R_PPC64_REL30: 8356 case R_PPC64_REL32: 8357 case R_PPC64_REL64: 8358 case R_PPC64_ADDR14: 8359 case R_PPC64_ADDR14_BRNTAKEN: 8360 case R_PPC64_ADDR14_BRTAKEN: 8361 case R_PPC64_ADDR16: 8362 case R_PPC64_ADDR16_DS: 8363 case R_PPC64_ADDR16_HA: 8364 case R_PPC64_ADDR16_HI: 8365 case R_PPC64_ADDR16_HIGHER: 8366 case R_PPC64_ADDR16_HIGHERA: 8367 case R_PPC64_ADDR16_HIGHEST: 8368 case R_PPC64_ADDR16_HIGHESTA: 8369 case R_PPC64_ADDR16_LO: 8370 case R_PPC64_ADDR16_LO_DS: 8371 case R_PPC64_ADDR24: 8372 case R_PPC64_ADDR32: 8373 case R_PPC64_ADDR64: 8374 case R_PPC64_UADDR16: 8375 case R_PPC64_UADDR32: 8376 case R_PPC64_UADDR64: 8377 /* r_symndx will be zero only for relocs against symbols 8378 from removed linkonce sections, or sections discarded by 8379 a linker script. */ 8380 dodyn: 8381 if (r_symndx == 0) 8382 break; 8383 /* Fall thru. */ 8384 8385 dodyn2: 8386 if ((input_section->flags & SEC_ALLOC) == 0) 8387 break; 8388 8389 if (NO_OPD_RELOCS && is_opd) 8390 break; 8391 8392 if ((info->shared 8393 && (h == NULL 8394 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT 8395 || h->root.type != bfd_link_hash_undefweak) 8396 && (MUST_BE_DYN_RELOC (r_type) 8397 || !SYMBOL_CALLS_LOCAL (info, h))) 8398 || (ELIMINATE_COPY_RELOCS 8399 && !info->shared 8400 && h != NULL 8401 && h->dynindx != -1 8402 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 8403 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 8404 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)) 8405 { 8406 Elf_Internal_Rela outrel; 8407 bfd_boolean skip, relocate; 8408 asection *sreloc; 8409 bfd_byte *loc; 8410 bfd_vma out_off; 8411 8412 /* When generating a dynamic object, these relocations 8413 are copied into the output file to be resolved at run 8414 time. */ 8415 8416 skip = FALSE; 8417 relocate = FALSE; 8418 8419 out_off = _bfd_elf_section_offset (output_bfd, info, 8420 input_section, rel->r_offset); 8421 if (out_off == (bfd_vma) -1) 8422 skip = TRUE; 8423 else if (out_off == (bfd_vma) -2) 8424 skip = TRUE, relocate = TRUE; 8425 out_off += (input_section->output_section->vma 8426 + input_section->output_offset); 8427 outrel.r_offset = out_off; 8428 outrel.r_addend = rel->r_addend; 8429 8430 /* Optimize unaligned reloc use. */ 8431 if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0) 8432 || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0)) 8433 r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64; 8434 else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0) 8435 || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0)) 8436 r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32; 8437 else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0) 8438 || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0)) 8439 r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16; 8440 8441 if (skip) 8442 memset (&outrel, 0, sizeof outrel); 8443 else if (!SYMBOL_REFERENCES_LOCAL (info, h) 8444 && !is_opd 8445 && r_type != R_PPC64_TOC) 8446 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); 8447 else 8448 { 8449 /* This symbol is local, or marked to become local, 8450 or this is an opd section reloc which must point 8451 at a local function. */ 8452 outrel.r_addend += relocation; 8453 if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) 8454 { 8455 if (is_opd && h != NULL) 8456 { 8457 /* Lie about opd entries. This case occurs 8458 when building shared libraries and we 8459 reference a function in another shared 8460 lib. The same thing happens for a weak 8461 definition in an application that's 8462 overridden by a strong definition in a 8463 shared lib. (I believe this is a generic 8464 bug in binutils handling of weak syms.) 8465 In these cases we won't use the opd 8466 entry in this lib. */ 8467 unresolved_reloc = FALSE; 8468 } 8469 outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); 8470 8471 /* We need to relocate .opd contents for ld.so. 8472 Prelink also wants simple and consistent rules 8473 for relocs. This make all RELATIVE relocs have 8474 *r_offset equal to r_addend. */ 8475 relocate = TRUE; 8476 } 8477 else 8478 { 8479 long indx = 0; 8480 8481 if (bfd_is_abs_section (sec)) 8482 ; 8483 else if (sec == NULL || sec->owner == NULL) 8484 { 8485 bfd_set_error (bfd_error_bad_value); 8486 return FALSE; 8487 } 8488 else 8489 { 8490 asection *osec; 8491 8492 osec = sec->output_section; 8493 indx = elf_section_data (osec)->dynindx; 8494 8495 /* We are turning this relocation into one 8496 against a section symbol, so subtract out 8497 the output section's address but not the 8498 offset of the input section in the output 8499 section. */ 8500 outrel.r_addend -= osec->vma; 8501 } 8502 8503 outrel.r_info = ELF64_R_INFO (indx, r_type); 8504 } 8505 } 8506 8507 sreloc = elf_section_data (input_section)->sreloc; 8508 if (sreloc == NULL) 8509 abort (); 8510 8511 loc = sreloc->contents; 8512 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); 8513 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); 8514 8515 /* If this reloc is against an external symbol, it will 8516 be computed at runtime, so there's no need to do 8517 anything now. However, for the sake of prelink ensure 8518 that the section contents are a known value. */ 8519 if (! relocate) 8520 { 8521 unresolved_reloc = FALSE; 8522 /* The value chosen here is quite arbitrary as ld.so 8523 ignores section contents except for the special 8524 case of .opd where the contents might be accessed 8525 before relocation. Choose zero, as that won't 8526 cause reloc overflow. */ 8527 relocation = 0; 8528 addend = 0; 8529 /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs 8530 to improve backward compatibility with older 8531 versions of ld. */ 8532 if (r_type == R_PPC64_ADDR64) 8533 addend = outrel.r_addend; 8534 /* Adjust pc_relative relocs to have zero in *r_offset. */ 8535 else if (ppc64_elf_howto_table[r_type]->pc_relative) 8536 addend = (input_section->output_section->vma 8537 + input_section->output_offset 8538 + rel->r_offset); 8539 } 8540 } 8541 break; 8542 8543 case R_PPC64_COPY: 8544 case R_PPC64_GLOB_DAT: 8545 case R_PPC64_JMP_SLOT: 8546 case R_PPC64_RELATIVE: 8547 /* We shouldn't ever see these dynamic relocs in relocatable 8548 files. */ 8549 /* Fall through. */ 8550 8551 case R_PPC64_PLTGOT16: 8552 case R_PPC64_PLTGOT16_DS: 8553 case R_PPC64_PLTGOT16_HA: 8554 case R_PPC64_PLTGOT16_HI: 8555 case R_PPC64_PLTGOT16_LO: 8556 case R_PPC64_PLTGOT16_LO_DS: 8557 case R_PPC64_PLTREL32: 8558 case R_PPC64_PLTREL64: 8559 /* These ones haven't been implemented yet. */ 8560 8561 (*_bfd_error_handler) 8562 (_("%s: relocation %s is not supported for symbol %s."), 8563 bfd_archive_filename (input_bfd), 8564 ppc64_elf_howto_table[r_type]->name, sym_name); 8565 8566 bfd_set_error (bfd_error_invalid_operation); 8567 ret = FALSE; 8568 continue; 8569 } 8570 8571 /* Do any further special processing. */ 8572 switch (r_type) 8573 { 8574 default: 8575 break; 8576 8577 case R_PPC64_ADDR16_HA: 8578 case R_PPC64_ADDR16_HIGHERA: 8579 case R_PPC64_ADDR16_HIGHESTA: 8580 case R_PPC64_GOT16_HA: 8581 case R_PPC64_PLTGOT16_HA: 8582 case R_PPC64_PLT16_HA: 8583 case R_PPC64_TOC16_HA: 8584 case R_PPC64_SECTOFF_HA: 8585 case R_PPC64_TPREL16_HA: 8586 case R_PPC64_DTPREL16_HA: 8587 case R_PPC64_GOT_TLSGD16_HA: 8588 case R_PPC64_GOT_TLSLD16_HA: 8589 case R_PPC64_GOT_TPREL16_HA: 8590 case R_PPC64_GOT_DTPREL16_HA: 8591 case R_PPC64_TPREL16_HIGHER: 8592 case R_PPC64_TPREL16_HIGHERA: 8593 case R_PPC64_TPREL16_HIGHEST: 8594 case R_PPC64_TPREL16_HIGHESTA: 8595 case R_PPC64_DTPREL16_HIGHER: 8596 case R_PPC64_DTPREL16_HIGHERA: 8597 case R_PPC64_DTPREL16_HIGHEST: 8598 case R_PPC64_DTPREL16_HIGHESTA: 8599 /* It's just possible that this symbol is a weak symbol 8600 that's not actually defined anywhere. In that case, 8601 'sec' would be NULL, and we should leave the symbol 8602 alone (it will be set to zero elsewhere in the link). */ 8603 if (sec != NULL) 8604 /* Add 0x10000 if sign bit in 0:15 is set. 8605 Bits 0:15 are not used. */ 8606 addend += 0x8000; 8607 break; 8608 8609 case R_PPC64_ADDR16_DS: 8610 case R_PPC64_ADDR16_LO_DS: 8611 case R_PPC64_GOT16_DS: 8612 case R_PPC64_GOT16_LO_DS: 8613 case R_PPC64_PLT16_LO_DS: 8614 case R_PPC64_SECTOFF_DS: 8615 case R_PPC64_SECTOFF_LO_DS: 8616 case R_PPC64_TOC16_DS: 8617 case R_PPC64_TOC16_LO_DS: 8618 case R_PPC64_PLTGOT16_DS: 8619 case R_PPC64_PLTGOT16_LO_DS: 8620 case R_PPC64_GOT_TPREL16_DS: 8621 case R_PPC64_GOT_TPREL16_LO_DS: 8622 case R_PPC64_GOT_DTPREL16_DS: 8623 case R_PPC64_GOT_DTPREL16_LO_DS: 8624 case R_PPC64_TPREL16_DS: 8625 case R_PPC64_TPREL16_LO_DS: 8626 case R_PPC64_DTPREL16_DS: 8627 case R_PPC64_DTPREL16_LO_DS: 8628 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); 8629 mask = 3; 8630 /* If this reloc is against an lq insn, then the value must be 8631 a multiple of 16. This is somewhat of a hack, but the 8632 "correct" way to do this by defining _DQ forms of all the 8633 _DS relocs bloats all reloc switches in this file. It 8634 doesn't seem to make much sense to use any of these relocs 8635 in data, so testing the insn should be safe. */ 8636 if ((insn & (0x3f << 26)) == (56u << 26)) 8637 mask = 15; 8638 if (((relocation + addend) & mask) != 0) 8639 { 8640 (*_bfd_error_handler) 8641 (_("%s: error: relocation %s not a multiple of %d"), 8642 bfd_archive_filename (input_bfd), 8643 ppc64_elf_howto_table[r_type]->name, 8644 mask + 1); 8645 bfd_set_error (bfd_error_bad_value); 8646 ret = FALSE; 8647 continue; 8648 } 8649 break; 8650 8651 case R_PPC64_REL14: 8652 case R_PPC64_REL14_BRNTAKEN: 8653 case R_PPC64_REL14_BRTAKEN: 8654 max_br_offset = 1 << 15; 8655 goto branch_check; 8656 8657 case R_PPC64_REL24: 8658 max_br_offset = 1 << 25; 8659 8660 branch_check: 8661 /* If the branch is out of reach or the TOC register needs 8662 adjusting, then redirect the call to the local stub for 8663 this function. */ 8664 from = (rel->r_offset 8665 + input_section->output_offset 8666 + input_section->output_section->vma); 8667 if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset 8668 || (sec != NULL 8669 && sec->output_section != NULL 8670 && sec->id <= htab->top_id 8671 && (htab->stub_group[sec->id].toc_off 8672 != htab->stub_group[input_section->id].toc_off))) 8673 && (stub_entry = ppc_get_stub_entry (input_section, sec, h, 8674 rel, htab)) != NULL) 8675 { 8676 /* Munge up the value and addend so that we call the stub 8677 rather than the procedure directly. */ 8678 relocation = (stub_entry->stub_offset 8679 + stub_entry->stub_sec->output_offset 8680 + stub_entry->stub_sec->output_section->vma); 8681 addend = 0; 8682 } 8683 break; 8684 } 8685 8686 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections 8687 because such sections are not SEC_ALLOC and thus ld.so will 8688 not process them. */ 8689 if (unresolved_reloc 8690 && !((input_section->flags & SEC_DEBUGGING) != 0 8691 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) 8692 { 8693 (*_bfd_error_handler) 8694 (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"), 8695 bfd_archive_filename (input_bfd), 8696 bfd_get_section_name (input_bfd, input_section), 8697 (long) rel->r_offset, 8698 ppc64_elf_howto_table[(int) r_type]->name, 8699 h->root.root.string); 8700 ret = FALSE; 8701 } 8702 8703 r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type], 8704 input_bfd, 8705 input_section, 8706 contents, 8707 rel->r_offset, 8708 relocation, 8709 addend); 8710 8711 if (r != bfd_reloc_ok) 8712 { 8713 if (sym_name == NULL) 8714 sym_name = "(null)"; 8715 if (r == bfd_reloc_overflow) 8716 { 8717 if (warned) 8718 continue; 8719 if (h != NULL 8720 && h->root.type == bfd_link_hash_undefweak 8721 && ppc64_elf_howto_table[r_type]->pc_relative) 8722 { 8723 /* Assume this is a call protected by other code that 8724 detects the symbol is undefined. If this is the case, 8725 we can safely ignore the overflow. If not, the 8726 program is hosed anyway, and a little warning isn't 8727 going to help. */ 8728 8729 continue; 8730 } 8731 8732 if (!((*info->callbacks->reloc_overflow) 8733 (info, sym_name, ppc64_elf_howto_table[r_type]->name, 8734 rel->r_addend, input_bfd, input_section, rel->r_offset))) 8735 return FALSE; 8736 } 8737 else 8738 { 8739 (*_bfd_error_handler) 8740 (_("%s(%s+0x%lx): %s reloc against `%s': error %d"), 8741 bfd_archive_filename (input_bfd), 8742 bfd_get_section_name (input_bfd, input_section), 8743 (long) rel->r_offset, 8744 ppc64_elf_howto_table[r_type]->name, 8745 sym_name, 8746 (int) r); 8747 ret = FALSE; 8748 } 8749 } 8750 } 8751 8752 return ret; 8753 } 8754 8755 /* Adjust the value of any local symbols in opd sections. */ 8756 8757 static bfd_boolean 8758 ppc64_elf_output_symbol_hook (struct bfd_link_info *info, 8759 const char *name ATTRIBUTE_UNUSED, 8760 Elf_Internal_Sym *elfsym, 8761 asection *input_sec, 8762 struct elf_link_hash_entry *h) 8763 { 8764 long *adjust; 8765 bfd_vma value; 8766 8767 if (h != NULL 8768 || input_sec == NULL 8769 || ppc64_elf_section_data (input_sec) == NULL 8770 || (adjust = ppc64_elf_section_data (input_sec)->opd.adjust) == NULL) 8771 return TRUE; 8772 8773 value = elfsym->st_value - input_sec->output_offset; 8774 if (!info->relocatable) 8775 value -= input_sec->output_section->vma; 8776 8777 elfsym->st_value += adjust[value / 24]; 8778 return TRUE; 8779 } 8780 8781 /* Finish up dynamic symbol handling. We set the contents of various 8782 dynamic sections here. */ 8783 8784 static bfd_boolean 8785 ppc64_elf_finish_dynamic_symbol (bfd *output_bfd, 8786 struct bfd_link_info *info, 8787 struct elf_link_hash_entry *h, 8788 Elf_Internal_Sym *sym) 8789 { 8790 struct ppc_link_hash_table *htab; 8791 bfd *dynobj; 8792 8793 htab = ppc_hash_table (info); 8794 dynobj = htab->elf.dynobj; 8795 8796 if (((struct ppc_link_hash_entry *) h)->is_func_descriptor) 8797 { 8798 struct plt_entry *ent; 8799 Elf_Internal_Rela rela; 8800 bfd_byte *loc; 8801 8802 for (ent = h->plt.plist; ent != NULL; ent = ent->next) 8803 if (ent->plt.offset != (bfd_vma) -1) 8804 { 8805 /* This symbol has an entry in the procedure linkage 8806 table. Set it up. */ 8807 8808 if (htab->plt == NULL 8809 || htab->relplt == NULL 8810 || htab->glink == NULL) 8811 abort (); 8812 8813 /* Create a JMP_SLOT reloc to inform the dynamic linker to 8814 fill in the PLT entry. */ 8815 rela.r_offset = (htab->plt->output_section->vma 8816 + htab->plt->output_offset 8817 + ent->plt.offset); 8818 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); 8819 rela.r_addend = ent->addend; 8820 8821 loc = htab->relplt->contents; 8822 loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE 8823 * sizeof (Elf64_External_Rela)); 8824 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 8825 } 8826 } 8827 8828 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) 8829 { 8830 Elf_Internal_Rela rela; 8831 bfd_byte *loc; 8832 8833 /* This symbol needs a copy reloc. Set it up. */ 8834 8835 if (h->dynindx == -1 8836 || (h->root.type != bfd_link_hash_defined 8837 && h->root.type != bfd_link_hash_defweak) 8838 || htab->relbss == NULL) 8839 abort (); 8840 8841 rela.r_offset = (h->root.u.def.value 8842 + h->root.u.def.section->output_section->vma 8843 + h->root.u.def.section->output_offset); 8844 rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); 8845 rela.r_addend = 0; 8846 loc = htab->relbss->contents; 8847 loc += htab->relbss->reloc_count++ * sizeof (Elf64_External_Rela); 8848 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); 8849 } 8850 8851 /* Mark some specially defined symbols as absolute. */ 8852 if (strcmp (h->root.root.string, "_DYNAMIC") == 0) 8853 sym->st_shndx = SHN_ABS; 8854 8855 return TRUE; 8856 } 8857 8858 /* Used to decide how to sort relocs in an optimal manner for the 8859 dynamic linker, before writing them out. */ 8860 8861 static enum elf_reloc_type_class 8862 ppc64_elf_reloc_type_class (const Elf_Internal_Rela *rela) 8863 { 8864 enum elf_ppc64_reloc_type r_type; 8865 8866 r_type = ELF64_R_TYPE (rela->r_info); 8867 switch (r_type) 8868 { 8869 case R_PPC64_RELATIVE: 8870 return reloc_class_relative; 8871 case R_PPC64_JMP_SLOT: 8872 return reloc_class_plt; 8873 case R_PPC64_COPY: 8874 return reloc_class_copy; 8875 default: 8876 return reloc_class_normal; 8877 } 8878 } 8879 8880 /* Finish up the dynamic sections. */ 8881 8882 static bfd_boolean 8883 ppc64_elf_finish_dynamic_sections (bfd *output_bfd, 8884 struct bfd_link_info *info) 8885 { 8886 struct ppc_link_hash_table *htab; 8887 bfd *dynobj; 8888 asection *sdyn; 8889 8890 htab = ppc_hash_table (info); 8891 dynobj = htab->elf.dynobj; 8892 sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); 8893 8894 if (htab->elf.dynamic_sections_created) 8895 { 8896 Elf64_External_Dyn *dyncon, *dynconend; 8897 8898 if (sdyn == NULL || htab->got == NULL) 8899 abort (); 8900 8901 dyncon = (Elf64_External_Dyn *) sdyn->contents; 8902 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); 8903 for (; dyncon < dynconend; dyncon++) 8904 { 8905 Elf_Internal_Dyn dyn; 8906 asection *s; 8907 8908 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); 8909 8910 switch (dyn.d_tag) 8911 { 8912 default: 8913 continue; 8914 8915 case DT_PPC64_GLINK: 8916 s = htab->glink; 8917 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 8918 /* We stupidly defined DT_PPC64_GLINK to be the start 8919 of glink rather than the first entry point, which is 8920 what ld.so needs, and now have a bigger stub to 8921 support automatic multiple TOCs. */ 8922 dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32; 8923 break; 8924 8925 case DT_PPC64_OPD: 8926 s = bfd_get_section_by_name (output_bfd, ".opd"); 8927 if (s == NULL) 8928 continue; 8929 dyn.d_un.d_ptr = s->vma; 8930 break; 8931 8932 case DT_PPC64_OPDSZ: 8933 s = bfd_get_section_by_name (output_bfd, ".opd"); 8934 if (s == NULL) 8935 continue; 8936 dyn.d_un.d_val = s->_raw_size; 8937 break; 8938 8939 case DT_PLTGOT: 8940 s = htab->plt; 8941 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 8942 break; 8943 8944 case DT_JMPREL: 8945 s = htab->relplt; 8946 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; 8947 break; 8948 8949 case DT_PLTRELSZ: 8950 dyn.d_un.d_val = htab->relplt->_raw_size; 8951 break; 8952 8953 case DT_RELASZ: 8954 /* Don't count procedure linkage table relocs in the 8955 overall reloc count. */ 8956 s = htab->relplt; 8957 if (s == NULL) 8958 continue; 8959 dyn.d_un.d_val -= s->_raw_size; 8960 break; 8961 8962 case DT_RELA: 8963 /* We may not be using the standard ELF linker script. 8964 If .rela.plt is the first .rela section, we adjust 8965 DT_RELA to not include it. */ 8966 s = htab->relplt; 8967 if (s == NULL) 8968 continue; 8969 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) 8970 continue; 8971 dyn.d_un.d_ptr += s->_raw_size; 8972 break; 8973 } 8974 8975 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); 8976 } 8977 } 8978 8979 if (htab->got != NULL && htab->got->_raw_size != 0) 8980 { 8981 /* Fill in the first entry in the global offset table. 8982 We use it to hold the link-time TOCbase. */ 8983 bfd_put_64 (output_bfd, 8984 elf_gp (output_bfd) + TOC_BASE_OFF, 8985 htab->got->contents); 8986 8987 /* Set .got entry size. */ 8988 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 8; 8989 } 8990 8991 if (htab->plt != NULL && htab->plt->_raw_size != 0) 8992 { 8993 /* Set .plt entry size. */ 8994 elf_section_data (htab->plt->output_section)->this_hdr.sh_entsize 8995 = PLT_ENTRY_SIZE; 8996 } 8997 8998 /* We need to handle writing out multiple GOT sections ourselves, 8999 since we didn't add them to DYNOBJ. */ 9000 while ((dynobj = dynobj->link_next) != NULL) 9001 { 9002 asection *s; 9003 s = ppc64_elf_tdata (dynobj)->got; 9004 if (s != NULL 9005 && s->_raw_size != 0 9006 && s->output_section != bfd_abs_section_ptr 9007 && !bfd_set_section_contents (output_bfd, s->output_section, 9008 s->contents, s->output_offset, 9009 s->_raw_size)) 9010 return FALSE; 9011 s = ppc64_elf_tdata (dynobj)->relgot; 9012 if (s != NULL 9013 && s->_raw_size != 0 9014 && s->output_section != bfd_abs_section_ptr 9015 && !bfd_set_section_contents (output_bfd, s->output_section, 9016 s->contents, s->output_offset, 9017 s->_raw_size)) 9018 return FALSE; 9019 } 9020 9021 return TRUE; 9022 } 9023 9024 #include "elf64-target.h" 9025