| 1 | /* PowerPC-specific support for 32-bit ELF |
| 2 | Copyright 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor, Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | /* This file is based on a preliminary PowerPC ELF ABI. The |
| 22 | information may not match the final PowerPC ELF ABI. It includes |
| 23 | suggestions from the in-progress Embedded PowerPC ABI, and that |
| 24 | information may also not match. */ |
| 25 | |
| 26 | #include "bfd.h" |
| 27 | #include "sysdep.h" |
| 28 | #include "bfdlink.h" |
| 29 | #include "libbfd.h" |
| 30 | #include "elf-bfd.h" |
| 31 | #include "elf/ppc.h" |
| 32 | |
| 33 | #define USE_RELA /* we want RELA relocations, not REL */ |
| 34 | |
| 35 | |
| 36 | static reloc_howto_type *ppc_elf_reloc_type_lookup |
| 37 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| 38 | static void ppc_elf_info_to_howto |
| 39 | PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst)); |
| 40 | static void ppc_elf_howto_init PARAMS ((void)); |
| 41 | static bfd_reloc_status_type ppc_elf_addr16_ha_reloc |
| 42 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 43 | static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword)); |
| 44 | static boolean ppc_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *)); |
| 45 | static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); |
| 46 | |
| 47 | static int ppc_elf_additional_program_headers PARAMS ((bfd *)); |
| 48 | static boolean ppc_elf_modify_segment_map PARAMS ((bfd *)); |
| 49 | |
| 50 | static boolean ppc_elf_create_dynamic_sections |
| 51 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 52 | |
| 53 | static boolean ppc_elf_section_from_shdr PARAMS ((bfd *, |
| 54 | Elf32_Internal_Shdr *, |
| 55 | char *)); |
| 56 | static boolean ppc_elf_fake_sections |
| 57 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); |
| 58 | |
| 59 | static elf_linker_section_t *ppc_elf_create_linker_section |
| 60 | PARAMS ((bfd *abfd, |
| 61 | struct bfd_link_info *info, |
| 62 | enum elf_linker_section_enum)); |
| 63 | |
| 64 | static boolean ppc_elf_check_relocs PARAMS ((bfd *, |
| 65 | struct bfd_link_info *, |
| 66 | asection *, |
| 67 | const Elf_Internal_Rela *)); |
| 68 | |
| 69 | static asection * ppc_elf_gc_mark_hook PARAMS ((bfd *abfd, |
| 70 | struct bfd_link_info *info, |
| 71 | Elf_Internal_Rela *rel, |
| 72 | struct elf_link_hash_entry *h, |
| 73 | Elf_Internal_Sym *sym)); |
| 74 | |
| 75 | static boolean ppc_elf_gc_sweep_hook PARAMS ((bfd *abfd, |
| 76 | struct bfd_link_info *info, |
| 77 | asection *sec, |
| 78 | const Elf_Internal_Rela *relocs)); |
| 79 | |
| 80 | static boolean ppc_elf_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *, |
| 81 | struct elf_link_hash_entry *)); |
| 82 | |
| 83 | static boolean ppc_elf_adjust_dynindx PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 84 | |
| 85 | static boolean ppc_elf_size_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); |
| 86 | |
| 87 | static boolean ppc_elf_relocate_section PARAMS ((bfd *, |
| 88 | struct bfd_link_info *info, |
| 89 | bfd *, |
| 90 | asection *, |
| 91 | bfd_byte *, |
| 92 | Elf_Internal_Rela *relocs, |
| 93 | Elf_Internal_Sym *local_syms, |
| 94 | asection **)); |
| 95 | |
| 96 | static boolean ppc_elf_add_symbol_hook PARAMS ((bfd *, |
| 97 | struct bfd_link_info *, |
| 98 | const Elf_Internal_Sym *, |
| 99 | const char **, |
| 100 | flagword *, |
| 101 | asection **, |
| 102 | bfd_vma *)); |
| 103 | |
| 104 | static boolean ppc_elf_finish_dynamic_symbol PARAMS ((bfd *, |
| 105 | struct bfd_link_info *, |
| 106 | struct elf_link_hash_entry *, |
| 107 | Elf_Internal_Sym *)); |
| 108 | |
| 109 | static boolean ppc_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); |
| 110 | |
| 111 | #define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */ |
| 112 | #define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */ |
| 113 | #define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */ |
| 114 | |
| 115 | /* The name of the dynamic interpreter. This is put in the .interp |
| 116 | section. */ |
| 117 | |
| 118 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 119 | |
| 120 | /* The size in bytes of an entry in the procedure linkage table, and of the initial size |
| 121 | of the plt reserved for the dynamic linker. */ |
| 122 | |
| 123 | #define PLT_ENTRY_SIZE 12 |
| 124 | #define PLT_INITIAL_ENTRY_SIZE 72 |
| 125 | |
| 126 | \f |
| 127 | static reloc_howto_type *ppc_elf_howto_table[ (int)R_PPC_max ]; |
| 128 | |
| 129 | static reloc_howto_type ppc_elf_howto_raw[] = |
| 130 | { |
| 131 | /* This reloc does nothing. */ |
| 132 | HOWTO (R_PPC_NONE, /* type */ |
| 133 | 0, /* rightshift */ |
| 134 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 135 | 32, /* bitsize */ |
| 136 | false, /* pc_relative */ |
| 137 | 0, /* bitpos */ |
| 138 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 139 | bfd_elf_generic_reloc, /* special_function */ |
| 140 | "R_PPC_NONE", /* name */ |
| 141 | false, /* partial_inplace */ |
| 142 | 0, /* src_mask */ |
| 143 | 0, /* dst_mask */ |
| 144 | false), /* pcrel_offset */ |
| 145 | |
| 146 | /* A standard 32 bit relocation. */ |
| 147 | HOWTO (R_PPC_ADDR32, /* type */ |
| 148 | 0, /* rightshift */ |
| 149 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 150 | 32, /* bitsize */ |
| 151 | false, /* pc_relative */ |
| 152 | 0, /* bitpos */ |
| 153 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 154 | bfd_elf_generic_reloc, /* special_function */ |
| 155 | "R_PPC_ADDR32", /* name */ |
| 156 | false, /* partial_inplace */ |
| 157 | 0, /* src_mask */ |
| 158 | 0xffffffff, /* dst_mask */ |
| 159 | false), /* pcrel_offset */ |
| 160 | |
| 161 | /* An absolute 26 bit branch; the lower two bits must be zero. |
| 162 | FIXME: we don't check that, we just clear them. */ |
| 163 | HOWTO (R_PPC_ADDR24, /* type */ |
| 164 | 0, /* rightshift */ |
| 165 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 166 | 26, /* bitsize */ |
| 167 | false, /* pc_relative */ |
| 168 | 0, /* bitpos */ |
| 169 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 170 | bfd_elf_generic_reloc, /* special_function */ |
| 171 | "R_PPC_ADDR24", /* name */ |
| 172 | false, /* partial_inplace */ |
| 173 | 0, /* src_mask */ |
| 174 | 0x3fffffc, /* dst_mask */ |
| 175 | false), /* pcrel_offset */ |
| 176 | |
| 177 | /* A standard 16 bit relocation. */ |
| 178 | HOWTO (R_PPC_ADDR16, /* type */ |
| 179 | 0, /* rightshift */ |
| 180 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 181 | 16, /* bitsize */ |
| 182 | false, /* pc_relative */ |
| 183 | 0, /* bitpos */ |
| 184 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 185 | bfd_elf_generic_reloc, /* special_function */ |
| 186 | "R_PPC_ADDR16", /* name */ |
| 187 | false, /* partial_inplace */ |
| 188 | 0, /* src_mask */ |
| 189 | 0xffff, /* dst_mask */ |
| 190 | false), /* pcrel_offset */ |
| 191 | |
| 192 | /* A 16 bit relocation without overflow. */ |
| 193 | HOWTO (R_PPC_ADDR16_LO, /* type */ |
| 194 | 0, /* rightshift */ |
| 195 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 196 | 16, /* bitsize */ |
| 197 | false, /* pc_relative */ |
| 198 | 0, /* bitpos */ |
| 199 | complain_overflow_dont,/* complain_on_overflow */ |
| 200 | bfd_elf_generic_reloc, /* special_function */ |
| 201 | "R_PPC_ADDR16_LO", /* name */ |
| 202 | false, /* partial_inplace */ |
| 203 | 0, /* src_mask */ |
| 204 | 0xffff, /* dst_mask */ |
| 205 | false), /* pcrel_offset */ |
| 206 | |
| 207 | /* The high order 16 bits of an address. */ |
| 208 | HOWTO (R_PPC_ADDR16_HI, /* type */ |
| 209 | 16, /* rightshift */ |
| 210 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 211 | 16, /* bitsize */ |
| 212 | false, /* pc_relative */ |
| 213 | 0, /* bitpos */ |
| 214 | complain_overflow_dont, /* complain_on_overflow */ |
| 215 | bfd_elf_generic_reloc, /* special_function */ |
| 216 | "R_PPC_ADDR16_HI", /* name */ |
| 217 | false, /* partial_inplace */ |
| 218 | 0, /* src_mask */ |
| 219 | 0xffff, /* dst_mask */ |
| 220 | false), /* pcrel_offset */ |
| 221 | |
| 222 | /* The high order 16 bits of an address, plus 1 if the contents of |
| 223 | the low 16 bits, treated as a signed number, is negative. */ |
| 224 | HOWTO (R_PPC_ADDR16_HA, /* type */ |
| 225 | 16, /* rightshift */ |
| 226 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 227 | 16, /* bitsize */ |
| 228 | false, /* pc_relative */ |
| 229 | 0, /* bitpos */ |
| 230 | complain_overflow_dont, /* complain_on_overflow */ |
| 231 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 232 | "R_PPC_ADDR16_HA", /* name */ |
| 233 | false, /* partial_inplace */ |
| 234 | 0, /* src_mask */ |
| 235 | 0xffff, /* dst_mask */ |
| 236 | false), /* pcrel_offset */ |
| 237 | |
| 238 | /* An absolute 16 bit branch; the lower two bits must be zero. |
| 239 | FIXME: we don't check that, we just clear them. */ |
| 240 | HOWTO (R_PPC_ADDR14, /* type */ |
| 241 | 0, /* rightshift */ |
| 242 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 243 | 16, /* bitsize */ |
| 244 | false, /* pc_relative */ |
| 245 | 0, /* bitpos */ |
| 246 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 247 | bfd_elf_generic_reloc, /* special_function */ |
| 248 | "R_PPC_ADDR14", /* name */ |
| 249 | false, /* partial_inplace */ |
| 250 | 0, /* src_mask */ |
| 251 | 0xfffc, /* dst_mask */ |
| 252 | false), /* pcrel_offset */ |
| 253 | |
| 254 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 255 | indicate that the branch is expected to be taken. The lower two |
| 256 | bits must be zero. */ |
| 257 | HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ |
| 258 | 0, /* rightshift */ |
| 259 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 260 | 16, /* bitsize */ |
| 261 | false, /* pc_relative */ |
| 262 | 0, /* bitpos */ |
| 263 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 264 | bfd_elf_generic_reloc, /* special_function */ |
| 265 | "R_PPC_ADDR14_BRTAKEN",/* name */ |
| 266 | false, /* partial_inplace */ |
| 267 | 0, /* src_mask */ |
| 268 | 0xfffc, /* dst_mask */ |
| 269 | false), /* pcrel_offset */ |
| 270 | |
| 271 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 272 | indicate that the branch is not expected to be taken. The lower |
| 273 | two bits must be zero. */ |
| 274 | HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ |
| 275 | 0, /* rightshift */ |
| 276 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 277 | 16, /* bitsize */ |
| 278 | false, /* pc_relative */ |
| 279 | 0, /* bitpos */ |
| 280 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 281 | bfd_elf_generic_reloc, /* special_function */ |
| 282 | "R_PPC_ADDR14_BRNTAKEN",/* name */ |
| 283 | false, /* partial_inplace */ |
| 284 | 0, /* src_mask */ |
| 285 | 0xfffc, /* dst_mask */ |
| 286 | false), /* pcrel_offset */ |
| 287 | |
| 288 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
| 289 | HOWTO (R_PPC_REL24, /* type */ |
| 290 | 0, /* rightshift */ |
| 291 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 292 | 26, /* bitsize */ |
| 293 | true, /* pc_relative */ |
| 294 | 0, /* bitpos */ |
| 295 | complain_overflow_signed, /* complain_on_overflow */ |
| 296 | bfd_elf_generic_reloc, /* special_function */ |
| 297 | "R_PPC_REL24", /* name */ |
| 298 | false, /* partial_inplace */ |
| 299 | 0, /* src_mask */ |
| 300 | 0x3fffffc, /* dst_mask */ |
| 301 | true), /* pcrel_offset */ |
| 302 | |
| 303 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
| 304 | HOWTO (R_PPC_REL14, /* type */ |
| 305 | 0, /* rightshift */ |
| 306 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 307 | 16, /* bitsize */ |
| 308 | true, /* pc_relative */ |
| 309 | 0, /* bitpos */ |
| 310 | complain_overflow_signed, /* complain_on_overflow */ |
| 311 | bfd_elf_generic_reloc, /* special_function */ |
| 312 | "R_PPC_REL14", /* name */ |
| 313 | false, /* partial_inplace */ |
| 314 | 0, /* src_mask */ |
| 315 | 0xfffc, /* dst_mask */ |
| 316 | true), /* pcrel_offset */ |
| 317 | |
| 318 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 319 | the branch is expected to be taken. The lower two bits must be |
| 320 | zero. */ |
| 321 | HOWTO (R_PPC_REL14_BRTAKEN, /* type */ |
| 322 | 0, /* rightshift */ |
| 323 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 324 | 16, /* bitsize */ |
| 325 | true, /* pc_relative */ |
| 326 | 0, /* bitpos */ |
| 327 | complain_overflow_signed, /* complain_on_overflow */ |
| 328 | bfd_elf_generic_reloc, /* special_function */ |
| 329 | "R_PPC_REL14_BRTAKEN", /* name */ |
| 330 | false, /* partial_inplace */ |
| 331 | 0, /* src_mask */ |
| 332 | 0xfffc, /* dst_mask */ |
| 333 | true), /* pcrel_offset */ |
| 334 | |
| 335 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 336 | the branch is not expected to be taken. The lower two bits must |
| 337 | be zero. */ |
| 338 | HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ |
| 339 | 0, /* rightshift */ |
| 340 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 341 | 16, /* bitsize */ |
| 342 | true, /* pc_relative */ |
| 343 | 0, /* bitpos */ |
| 344 | complain_overflow_signed, /* complain_on_overflow */ |
| 345 | bfd_elf_generic_reloc, /* special_function */ |
| 346 | "R_PPC_REL14_BRNTAKEN",/* name */ |
| 347 | false, /* partial_inplace */ |
| 348 | 0, /* src_mask */ |
| 349 | 0xfffc, /* dst_mask */ |
| 350 | true), /* pcrel_offset */ |
| 351 | |
| 352 | /* Like R_PPC_ADDR16, but referring to the GOT table entry for the |
| 353 | symbol. */ |
| 354 | HOWTO (R_PPC_GOT16, /* type */ |
| 355 | 0, /* rightshift */ |
| 356 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 357 | 16, /* bitsize */ |
| 358 | false, /* pc_relative */ |
| 359 | 0, /* bitpos */ |
| 360 | complain_overflow_signed, /* complain_on_overflow */ |
| 361 | bfd_elf_generic_reloc, /* special_function */ |
| 362 | "R_PPC_GOT16", /* name */ |
| 363 | false, /* partial_inplace */ |
| 364 | 0, /* src_mask */ |
| 365 | 0xffff, /* dst_mask */ |
| 366 | false), /* pcrel_offset */ |
| 367 | |
| 368 | /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for |
| 369 | the symbol. */ |
| 370 | HOWTO (R_PPC_GOT16_LO, /* type */ |
| 371 | 0, /* rightshift */ |
| 372 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 373 | 16, /* bitsize */ |
| 374 | false, /* pc_relative */ |
| 375 | 0, /* bitpos */ |
| 376 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 377 | bfd_elf_generic_reloc, /* special_function */ |
| 378 | "R_PPC_GOT16_LO", /* name */ |
| 379 | false, /* partial_inplace */ |
| 380 | 0, /* src_mask */ |
| 381 | 0xffff, /* dst_mask */ |
| 382 | false), /* pcrel_offset */ |
| 383 | |
| 384 | /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for |
| 385 | the symbol. */ |
| 386 | HOWTO (R_PPC_GOT16_HI, /* type */ |
| 387 | 16, /* rightshift */ |
| 388 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 389 | 16, /* bitsize */ |
| 390 | false, /* pc_relative */ |
| 391 | 0, /* bitpos */ |
| 392 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 393 | bfd_elf_generic_reloc, /* special_function */ |
| 394 | "R_PPC_GOT16_HI", /* name */ |
| 395 | false, /* partial_inplace */ |
| 396 | 0, /* src_mask */ |
| 397 | 0xffff, /* dst_mask */ |
| 398 | false), /* pcrel_offset */ |
| 399 | |
| 400 | /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for |
| 401 | the symbol. */ |
| 402 | HOWTO (R_PPC_GOT16_HA, /* type */ |
| 403 | 16, /* rightshift */ |
| 404 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 405 | 16, /* bitsize */ |
| 406 | false, /* pc_relative */ |
| 407 | 0, /* bitpos */ |
| 408 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 409 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 410 | "R_PPC_GOT16_HA", /* name */ |
| 411 | false, /* partial_inplace */ |
| 412 | 0, /* src_mask */ |
| 413 | 0xffff, /* dst_mask */ |
| 414 | false), /* pcrel_offset */ |
| 415 | |
| 416 | /* Like R_PPC_REL24, but referring to the procedure linkage table |
| 417 | entry for the symbol. */ |
| 418 | HOWTO (R_PPC_PLTREL24, /* type */ |
| 419 | 0, /* rightshift */ |
| 420 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 421 | 26, /* bitsize */ |
| 422 | true, /* pc_relative */ |
| 423 | 0, /* bitpos */ |
| 424 | complain_overflow_signed, /* complain_on_overflow */ |
| 425 | bfd_elf_generic_reloc, /* special_function */ |
| 426 | "R_PPC_PLTREL24", /* name */ |
| 427 | false, /* partial_inplace */ |
| 428 | 0, /* src_mask */ |
| 429 | 0x3fffffc, /* dst_mask */ |
| 430 | true), /* pcrel_offset */ |
| 431 | |
| 432 | /* This is used only by the dynamic linker. The symbol should exist |
| 433 | both in the object being run and in some shared library. The |
| 434 | dynamic linker copies the data addressed by the symbol from the |
| 435 | shared library into the object, because the object being |
| 436 | run has to have the data at some particular address. */ |
| 437 | HOWTO (R_PPC_COPY, /* type */ |
| 438 | 0, /* rightshift */ |
| 439 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 440 | 32, /* bitsize */ |
| 441 | false, /* pc_relative */ |
| 442 | 0, /* bitpos */ |
| 443 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 444 | bfd_elf_generic_reloc, /* special_function */ |
| 445 | "R_PPC_COPY", /* name */ |
| 446 | false, /* partial_inplace */ |
| 447 | 0, /* src_mask */ |
| 448 | 0, /* dst_mask */ |
| 449 | false), /* pcrel_offset */ |
| 450 | |
| 451 | /* Like R_PPC_ADDR32, but used when setting global offset table |
| 452 | entries. */ |
| 453 | HOWTO (R_PPC_GLOB_DAT, /* type */ |
| 454 | 0, /* rightshift */ |
| 455 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 456 | 32, /* bitsize */ |
| 457 | false, /* pc_relative */ |
| 458 | 0, /* bitpos */ |
| 459 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 460 | bfd_elf_generic_reloc, /* special_function */ |
| 461 | "R_PPC_GLOB_DAT", /* name */ |
| 462 | false, /* partial_inplace */ |
| 463 | 0, /* src_mask */ |
| 464 | 0xffffffff, /* dst_mask */ |
| 465 | false), /* pcrel_offset */ |
| 466 | |
| 467 | /* Marks a procedure linkage table entry for a symbol. */ |
| 468 | HOWTO (R_PPC_JMP_SLOT, /* type */ |
| 469 | 0, /* rightshift */ |
| 470 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 471 | 32, /* bitsize */ |
| 472 | false, /* pc_relative */ |
| 473 | 0, /* bitpos */ |
| 474 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 475 | bfd_elf_generic_reloc, /* special_function */ |
| 476 | "R_PPC_JMP_SLOT", /* name */ |
| 477 | false, /* partial_inplace */ |
| 478 | 0, /* src_mask */ |
| 479 | 0, /* dst_mask */ |
| 480 | false), /* pcrel_offset */ |
| 481 | |
| 482 | /* Used only by the dynamic linker. When the object is run, this |
| 483 | longword is set to the load address of the object, plus the |
| 484 | addend. */ |
| 485 | HOWTO (R_PPC_RELATIVE, /* type */ |
| 486 | 0, /* rightshift */ |
| 487 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 488 | 32, /* bitsize */ |
| 489 | false, /* pc_relative */ |
| 490 | 0, /* bitpos */ |
| 491 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 492 | bfd_elf_generic_reloc, /* special_function */ |
| 493 | "R_PPC_RELATIVE", /* name */ |
| 494 | false, /* partial_inplace */ |
| 495 | 0, /* src_mask */ |
| 496 | 0xffffffff, /* dst_mask */ |
| 497 | false), /* pcrel_offset */ |
| 498 | |
| 499 | /* Like R_PPC_REL24, but uses the value of the symbol within the |
| 500 | object rather than the final value. Normally used for |
| 501 | _GLOBAL_OFFSET_TABLE_. */ |
| 502 | HOWTO (R_PPC_LOCAL24PC, /* type */ |
| 503 | 0, /* rightshift */ |
| 504 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 505 | 26, /* bitsize */ |
| 506 | true, /* pc_relative */ |
| 507 | 0, /* bitpos */ |
| 508 | complain_overflow_signed, /* complain_on_overflow */ |
| 509 | bfd_elf_generic_reloc, /* special_function */ |
| 510 | "R_PPC_LOCAL24PC", /* name */ |
| 511 | false, /* partial_inplace */ |
| 512 | 0, /* src_mask */ |
| 513 | 0x3fffffc, /* dst_mask */ |
| 514 | true), /* pcrel_offset */ |
| 515 | |
| 516 | /* Like R_PPC_ADDR32, but may be unaligned. */ |
| 517 | HOWTO (R_PPC_UADDR32, /* type */ |
| 518 | 0, /* rightshift */ |
| 519 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 520 | 32, /* bitsize */ |
| 521 | false, /* pc_relative */ |
| 522 | 0, /* bitpos */ |
| 523 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 524 | bfd_elf_generic_reloc, /* special_function */ |
| 525 | "R_PPC_UADDR32", /* name */ |
| 526 | false, /* partial_inplace */ |
| 527 | 0, /* src_mask */ |
| 528 | 0xffffffff, /* dst_mask */ |
| 529 | false), /* pcrel_offset */ |
| 530 | |
| 531 | /* Like R_PPC_ADDR16, but may be unaligned. */ |
| 532 | HOWTO (R_PPC_UADDR16, /* type */ |
| 533 | 0, /* rightshift */ |
| 534 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 535 | 16, /* bitsize */ |
| 536 | false, /* pc_relative */ |
| 537 | 0, /* bitpos */ |
| 538 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 539 | bfd_elf_generic_reloc, /* special_function */ |
| 540 | "R_PPC_UADDR16", /* name */ |
| 541 | false, /* partial_inplace */ |
| 542 | 0, /* src_mask */ |
| 543 | 0xffff, /* dst_mask */ |
| 544 | false), /* pcrel_offset */ |
| 545 | |
| 546 | /* 32-bit PC relative */ |
| 547 | HOWTO (R_PPC_REL32, /* type */ |
| 548 | 0, /* rightshift */ |
| 549 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 550 | 32, /* bitsize */ |
| 551 | true, /* pc_relative */ |
| 552 | 0, /* bitpos */ |
| 553 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 554 | bfd_elf_generic_reloc, /* special_function */ |
| 555 | "R_PPC_REL32", /* name */ |
| 556 | false, /* partial_inplace */ |
| 557 | 0, /* src_mask */ |
| 558 | 0xffffffff, /* dst_mask */ |
| 559 | true), /* pcrel_offset */ |
| 560 | |
| 561 | /* 32-bit relocation to the symbol's procedure linkage table. |
| 562 | FIXME: not supported. */ |
| 563 | HOWTO (R_PPC_PLT32, /* type */ |
| 564 | 0, /* rightshift */ |
| 565 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 566 | 32, /* bitsize */ |
| 567 | false, /* pc_relative */ |
| 568 | 0, /* bitpos */ |
| 569 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 570 | bfd_elf_generic_reloc, /* special_function */ |
| 571 | "R_PPC_PLT32", /* name */ |
| 572 | false, /* partial_inplace */ |
| 573 | 0, /* src_mask */ |
| 574 | 0, /* dst_mask */ |
| 575 | false), /* pcrel_offset */ |
| 576 | |
| 577 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| 578 | FIXME: not supported. */ |
| 579 | HOWTO (R_PPC_PLTREL32, /* type */ |
| 580 | 0, /* rightshift */ |
| 581 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 582 | 32, /* bitsize */ |
| 583 | true, /* pc_relative */ |
| 584 | 0, /* bitpos */ |
| 585 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 586 | bfd_elf_generic_reloc, /* special_function */ |
| 587 | "R_PPC_PLTREL32", /* name */ |
| 588 | false, /* partial_inplace */ |
| 589 | 0, /* src_mask */ |
| 590 | 0, /* dst_mask */ |
| 591 | true), /* pcrel_offset */ |
| 592 | |
| 593 | /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for |
| 594 | the symbol. */ |
| 595 | HOWTO (R_PPC_PLT16_LO, /* type */ |
| 596 | 0, /* rightshift */ |
| 597 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 598 | 16, /* bitsize */ |
| 599 | false, /* pc_relative */ |
| 600 | 0, /* bitpos */ |
| 601 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 602 | bfd_elf_generic_reloc, /* special_function */ |
| 603 | "R_PPC_PLT16_LO", /* name */ |
| 604 | false, /* partial_inplace */ |
| 605 | 0, /* src_mask */ |
| 606 | 0xffff, /* dst_mask */ |
| 607 | false), /* pcrel_offset */ |
| 608 | |
| 609 | /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for |
| 610 | the symbol. */ |
| 611 | HOWTO (R_PPC_PLT16_HI, /* type */ |
| 612 | 16, /* rightshift */ |
| 613 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 614 | 16, /* bitsize */ |
| 615 | false, /* pc_relative */ |
| 616 | 0, /* bitpos */ |
| 617 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 618 | bfd_elf_generic_reloc, /* special_function */ |
| 619 | "R_PPC_PLT16_HI", /* name */ |
| 620 | false, /* partial_inplace */ |
| 621 | 0, /* src_mask */ |
| 622 | 0xffff, /* dst_mask */ |
| 623 | false), /* pcrel_offset */ |
| 624 | |
| 625 | /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for |
| 626 | the symbol. FIXME: Not supported. */ |
| 627 | HOWTO (R_PPC_PLT16_HA, /* type */ |
| 628 | 0, /* rightshift */ |
| 629 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 630 | 16, /* bitsize */ |
| 631 | false, /* pc_relative */ |
| 632 | 0, /* bitpos */ |
| 633 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 634 | bfd_elf_generic_reloc, /* special_function */ |
| 635 | "R_PPC_PLT16_HA", /* name */ |
| 636 | false, /* partial_inplace */ |
| 637 | 0, /* src_mask */ |
| 638 | 0xffff, /* dst_mask */ |
| 639 | false), /* pcrel_offset */ |
| 640 | |
| 641 | /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with |
| 642 | small data items. */ |
| 643 | HOWTO (R_PPC_SDAREL16, /* type */ |
| 644 | 0, /* rightshift */ |
| 645 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 646 | 16, /* bitsize */ |
| 647 | false, /* pc_relative */ |
| 648 | 0, /* bitpos */ |
| 649 | complain_overflow_signed, /* complain_on_overflow */ |
| 650 | bfd_elf_generic_reloc, /* special_function */ |
| 651 | "R_PPC_SDAREL16", /* name */ |
| 652 | false, /* partial_inplace */ |
| 653 | 0, /* src_mask */ |
| 654 | 0xffff, /* dst_mask */ |
| 655 | false), /* pcrel_offset */ |
| 656 | |
| 657 | /* 32-bit section relative relocation. */ |
| 658 | HOWTO (R_PPC_SECTOFF, /* type */ |
| 659 | 0, /* rightshift */ |
| 660 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 661 | 32, /* bitsize */ |
| 662 | true, /* pc_relative */ |
| 663 | 0, /* bitpos */ |
| 664 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 665 | bfd_elf_generic_reloc, /* special_function */ |
| 666 | "R_PPC_SECTOFF", /* name */ |
| 667 | false, /* partial_inplace */ |
| 668 | 0, /* src_mask */ |
| 669 | 0, /* dst_mask */ |
| 670 | true), /* pcrel_offset */ |
| 671 | |
| 672 | /* 16-bit lower half section relative relocation. */ |
| 673 | HOWTO (R_PPC_SECTOFF_LO, /* type */ |
| 674 | 0, /* rightshift */ |
| 675 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 676 | 16, /* bitsize */ |
| 677 | false, /* pc_relative */ |
| 678 | 0, /* bitpos */ |
| 679 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 680 | bfd_elf_generic_reloc, /* special_function */ |
| 681 | "R_PPC_SECTOFF_LO", /* name */ |
| 682 | false, /* partial_inplace */ |
| 683 | 0, /* src_mask */ |
| 684 | 0xffff, /* dst_mask */ |
| 685 | false), /* pcrel_offset */ |
| 686 | |
| 687 | /* 16-bit upper half section relative relocation. */ |
| 688 | HOWTO (R_PPC_SECTOFF_HI, /* type */ |
| 689 | 16, /* rightshift */ |
| 690 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 691 | 16, /* bitsize */ |
| 692 | false, /* pc_relative */ |
| 693 | 0, /* bitpos */ |
| 694 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 695 | bfd_elf_generic_reloc, /* special_function */ |
| 696 | "R_PPC_SECTOFF_HI", /* name */ |
| 697 | false, /* partial_inplace */ |
| 698 | 0, /* src_mask */ |
| 699 | 0xffff, /* dst_mask */ |
| 700 | false), /* pcrel_offset */ |
| 701 | |
| 702 | /* 16-bit upper half adjusted section relative relocation. */ |
| 703 | HOWTO (R_PPC_SECTOFF_HA, /* type */ |
| 704 | 0, /* rightshift */ |
| 705 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 706 | 16, /* bitsize */ |
| 707 | false, /* pc_relative */ |
| 708 | 0, /* bitpos */ |
| 709 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 710 | bfd_elf_generic_reloc, /* special_function */ |
| 711 | "R_PPC_SECTOFF_HA", /* name */ |
| 712 | false, /* partial_inplace */ |
| 713 | 0, /* src_mask */ |
| 714 | 0xffff, /* dst_mask */ |
| 715 | false), /* pcrel_offset */ |
| 716 | |
| 717 | /* The remaining relocs are from the Embedded ELF ABI, and are not |
| 718 | in the SVR4 ELF ABI. */ |
| 719 | |
| 720 | /* 32 bit value resulting from the addend minus the symbol */ |
| 721 | HOWTO (R_PPC_EMB_NADDR32, /* type */ |
| 722 | 0, /* rightshift */ |
| 723 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 724 | 32, /* bitsize */ |
| 725 | false, /* pc_relative */ |
| 726 | 0, /* bitpos */ |
| 727 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 728 | bfd_elf_generic_reloc, /* special_function */ |
| 729 | "R_PPC_EMB_NADDR32", /* name */ |
| 730 | false, /* partial_inplace */ |
| 731 | 0, /* src_mask */ |
| 732 | 0xffffffff, /* dst_mask */ |
| 733 | false), /* pcrel_offset */ |
| 734 | |
| 735 | /* 16 bit value resulting from the addend minus the symbol */ |
| 736 | HOWTO (R_PPC_EMB_NADDR16, /* type */ |
| 737 | 0, /* rightshift */ |
| 738 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 739 | 16, /* bitsize */ |
| 740 | false, /* pc_relative */ |
| 741 | 0, /* bitpos */ |
| 742 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 743 | bfd_elf_generic_reloc, /* special_function */ |
| 744 | "R_PPC_EMB_NADDR16", /* name */ |
| 745 | false, /* partial_inplace */ |
| 746 | 0, /* src_mask */ |
| 747 | 0xffff, /* dst_mask */ |
| 748 | false), /* pcrel_offset */ |
| 749 | |
| 750 | /* 16 bit value resulting from the addend minus the symbol */ |
| 751 | HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ |
| 752 | 0, /* rightshift */ |
| 753 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 754 | 16, /* bitsize */ |
| 755 | false, /* pc_relative */ |
| 756 | 0, /* bitpos */ |
| 757 | complain_overflow_dont,/* complain_on_overflow */ |
| 758 | bfd_elf_generic_reloc, /* special_function */ |
| 759 | "R_PPC_EMB_ADDR16_LO", /* name */ |
| 760 | false, /* partial_inplace */ |
| 761 | 0, /* src_mask */ |
| 762 | 0xffff, /* dst_mask */ |
| 763 | false), /* pcrel_offset */ |
| 764 | |
| 765 | /* The high order 16 bits of the addend minus the symbol */ |
| 766 | HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ |
| 767 | 16, /* rightshift */ |
| 768 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 769 | 16, /* bitsize */ |
| 770 | false, /* pc_relative */ |
| 771 | 0, /* bitpos */ |
| 772 | complain_overflow_dont, /* complain_on_overflow */ |
| 773 | bfd_elf_generic_reloc, /* special_function */ |
| 774 | "R_PPC_EMB_NADDR16_HI", /* name */ |
| 775 | false, /* partial_inplace */ |
| 776 | 0, /* src_mask */ |
| 777 | 0xffff, /* dst_mask */ |
| 778 | false), /* pcrel_offset */ |
| 779 | |
| 780 | /* The high order 16 bits of the result of the addend minus the address, |
| 781 | plus 1 if the contents of the low 16 bits, treated as a signed number, |
| 782 | is negative. */ |
| 783 | HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ |
| 784 | 16, /* rightshift */ |
| 785 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 786 | 16, /* bitsize */ |
| 787 | false, /* pc_relative */ |
| 788 | 0, /* bitpos */ |
| 789 | complain_overflow_dont, /* complain_on_overflow */ |
| 790 | bfd_elf_generic_reloc, /* special_function */ |
| 791 | "R_PPC_EMB_NADDR16_HA", /* name */ |
| 792 | false, /* partial_inplace */ |
| 793 | 0, /* src_mask */ |
| 794 | 0xffff, /* dst_mask */ |
| 795 | false), /* pcrel_offset */ |
| 796 | |
| 797 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 798 | address in the .sdata section, and returning the offset from |
| 799 | _SDA_BASE_ for that relocation */ |
| 800 | HOWTO (R_PPC_EMB_SDAI16, /* type */ |
| 801 | 0, /* rightshift */ |
| 802 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 803 | 16, /* bitsize */ |
| 804 | false, /* pc_relative */ |
| 805 | 0, /* bitpos */ |
| 806 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 807 | bfd_elf_generic_reloc, /* special_function */ |
| 808 | "R_PPC_EMB_SDAI16", /* name */ |
| 809 | false, /* partial_inplace */ |
| 810 | 0, /* src_mask */ |
| 811 | 0xffff, /* dst_mask */ |
| 812 | false), /* pcrel_offset */ |
| 813 | |
| 814 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 815 | address in the .sdata2 section, and returning the offset from |
| 816 | _SDA2_BASE_ for that relocation */ |
| 817 | HOWTO (R_PPC_EMB_SDA2I16, /* type */ |
| 818 | 0, /* rightshift */ |
| 819 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 820 | 16, /* bitsize */ |
| 821 | false, /* pc_relative */ |
| 822 | 0, /* bitpos */ |
| 823 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 824 | bfd_elf_generic_reloc, /* special_function */ |
| 825 | "R_PPC_EMB_SDA2I16", /* name */ |
| 826 | false, /* partial_inplace */ |
| 827 | 0, /* src_mask */ |
| 828 | 0xffff, /* dst_mask */ |
| 829 | false), /* pcrel_offset */ |
| 830 | |
| 831 | /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with |
| 832 | small data items. */ |
| 833 | HOWTO (R_PPC_EMB_SDA2REL, /* type */ |
| 834 | 0, /* rightshift */ |
| 835 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 836 | 16, /* bitsize */ |
| 837 | false, /* pc_relative */ |
| 838 | 0, /* bitpos */ |
| 839 | complain_overflow_signed, /* complain_on_overflow */ |
| 840 | bfd_elf_generic_reloc, /* special_function */ |
| 841 | "R_PPC_EMB_SDA2REL", /* name */ |
| 842 | false, /* partial_inplace */ |
| 843 | 0, /* src_mask */ |
| 844 | 0xffff, /* dst_mask */ |
| 845 | false), /* pcrel_offset */ |
| 846 | |
| 847 | /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit |
| 848 | signed offset from the appropriate base, and filling in the register |
| 849 | field with the appropriate register (0, 2, or 13). */ |
| 850 | HOWTO (R_PPC_EMB_SDA21, /* type */ |
| 851 | 0, /* rightshift */ |
| 852 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 853 | 16, /* bitsize */ |
| 854 | false, /* pc_relative */ |
| 855 | 0, /* bitpos */ |
| 856 | complain_overflow_signed, /* complain_on_overflow */ |
| 857 | bfd_elf_generic_reloc, /* special_function */ |
| 858 | "R_PPC_EMB_SDA21", /* name */ |
| 859 | false, /* partial_inplace */ |
| 860 | 0, /* src_mask */ |
| 861 | 0xffff, /* dst_mask */ |
| 862 | false), /* pcrel_offset */ |
| 863 | |
| 864 | /* Relocation not handled: R_PPC_EMB_MRKREF */ |
| 865 | /* Relocation not handled: R_PPC_EMB_RELSEC16 */ |
| 866 | /* Relocation not handled: R_PPC_EMB_RELST_LO */ |
| 867 | /* Relocation not handled: R_PPC_EMB_RELST_HI */ |
| 868 | /* Relocation not handled: R_PPC_EMB_RELST_HA */ |
| 869 | /* Relocation not handled: R_PPC_EMB_BIT_FLD */ |
| 870 | |
| 871 | /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling |
| 872 | in the 16 bit signed offset from the appropriate base, and filling in the |
| 873 | register field with the appropriate register (0, 2, or 13). */ |
| 874 | HOWTO (R_PPC_EMB_RELSDA, /* type */ |
| 875 | 0, /* rightshift */ |
| 876 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 877 | 16, /* bitsize */ |
| 878 | true, /* pc_relative */ |
| 879 | 0, /* bitpos */ |
| 880 | complain_overflow_signed, /* complain_on_overflow */ |
| 881 | bfd_elf_generic_reloc, /* special_function */ |
| 882 | "R_PPC_EMB_RELSDA", /* name */ |
| 883 | false, /* partial_inplace */ |
| 884 | 0, /* src_mask */ |
| 885 | 0xffff, /* dst_mask */ |
| 886 | false), /* pcrel_offset */ |
| 887 | |
| 888 | /* GNU extension to record C++ vtable hierarchy */ |
| 889 | HOWTO (R_PPC_GNU_VTINHERIT, /* type */ |
| 890 | 0, /* rightshift */ |
| 891 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 892 | 0, /* bitsize */ |
| 893 | false, /* pc_relative */ |
| 894 | 0, /* bitpos */ |
| 895 | complain_overflow_dont, /* complain_on_overflow */ |
| 896 | NULL, /* special_function */ |
| 897 | "R_PPC_GNU_VTINHERIT", /* name */ |
| 898 | false, /* partial_inplace */ |
| 899 | 0, /* src_mask */ |
| 900 | 0, /* dst_mask */ |
| 901 | false), /* pcrel_offset */ |
| 902 | |
| 903 | /* GNU extension to record C++ vtable member usage */ |
| 904 | HOWTO (R_PPC_GNU_VTENTRY, /* type */ |
| 905 | 0, /* rightshift */ |
| 906 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 907 | 0, /* bitsize */ |
| 908 | false, /* pc_relative */ |
| 909 | 0, /* bitpos */ |
| 910 | complain_overflow_dont, /* complain_on_overflow */ |
| 911 | NULL, /* special_function */ |
| 912 | "R_PPC_GNU_VTENTRY", /* name */ |
| 913 | false, /* partial_inplace */ |
| 914 | 0, /* src_mask */ |
| 915 | 0, /* dst_mask */ |
| 916 | false), /* pcrel_offset */ |
| 917 | |
| 918 | /* Phony reloc to handle AIX style TOC entries */ |
| 919 | HOWTO (R_PPC_TOC16, /* type */ |
| 920 | 0, /* rightshift */ |
| 921 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 922 | 16, /* bitsize */ |
| 923 | false, /* pc_relative */ |
| 924 | 0, /* bitpos */ |
| 925 | complain_overflow_signed, /* complain_on_overflow */ |
| 926 | bfd_elf_generic_reloc, /* special_function */ |
| 927 | "R_PPC_TOC16", /* name */ |
| 928 | false, /* partial_inplace */ |
| 929 | 0, /* src_mask */ |
| 930 | 0xffff, /* dst_mask */ |
| 931 | false), /* pcrel_offset */ |
| 932 | }; |
| 933 | |
| 934 | \f |
| 935 | /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ |
| 936 | |
| 937 | static void |
| 938 | ppc_elf_howto_init () |
| 939 | { |
| 940 | unsigned int i, type; |
| 941 | |
| 942 | for (i = 0; i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); i++) |
| 943 | { |
| 944 | type = ppc_elf_howto_raw[i].type; |
| 945 | BFD_ASSERT (type < sizeof(ppc_elf_howto_table) / sizeof(ppc_elf_howto_table[0])); |
| 946 | ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; |
| 947 | } |
| 948 | } |
| 949 | |
| 950 | \f |
| 951 | static reloc_howto_type * |
| 952 | ppc_elf_reloc_type_lookup (abfd, code) |
| 953 | bfd *abfd; |
| 954 | bfd_reloc_code_real_type code; |
| 955 | { |
| 956 | enum elf_ppc_reloc_type ppc_reloc = R_PPC_NONE; |
| 957 | |
| 958 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 959 | /* Initialize howto table if needed */ |
| 960 | ppc_elf_howto_init (); |
| 961 | |
| 962 | switch ((int)code) |
| 963 | { |
| 964 | default: |
| 965 | return (reloc_howto_type *)NULL; |
| 966 | |
| 967 | case BFD_RELOC_NONE: ppc_reloc = R_PPC_NONE; break; |
| 968 | case BFD_RELOC_32: ppc_reloc = R_PPC_ADDR32; break; |
| 969 | case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC_ADDR24; break; |
| 970 | case BFD_RELOC_16: ppc_reloc = R_PPC_ADDR16; break; |
| 971 | case BFD_RELOC_LO16: ppc_reloc = R_PPC_ADDR16_LO; break; |
| 972 | case BFD_RELOC_HI16: ppc_reloc = R_PPC_ADDR16_HI; break; |
| 973 | case BFD_RELOC_HI16_S: ppc_reloc = R_PPC_ADDR16_HA; break; |
| 974 | case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC_ADDR14; break; |
| 975 | case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC_ADDR14_BRTAKEN; break; |
| 976 | case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC_ADDR14_BRNTAKEN; break; |
| 977 | case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC_REL24; break; |
| 978 | case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC_REL14; break; |
| 979 | case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC_REL14_BRTAKEN; break; |
| 980 | case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC_REL14_BRNTAKEN; break; |
| 981 | case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC_GOT16; break; |
| 982 | case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC_GOT16_LO; break; |
| 983 | case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC_GOT16_HI; break; |
| 984 | case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC_GOT16_HA; break; |
| 985 | case BFD_RELOC_24_PLT_PCREL: ppc_reloc = R_PPC_PLTREL24; break; |
| 986 | case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC_COPY; break; |
| 987 | case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC_GLOB_DAT; break; |
| 988 | case BFD_RELOC_PPC_LOCAL24PC: ppc_reloc = R_PPC_LOCAL24PC; break; |
| 989 | case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC_REL32; break; |
| 990 | case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC_PLT32; break; |
| 991 | case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC_PLTREL32; break; |
| 992 | case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC_PLT16_LO; break; |
| 993 | case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC_PLT16_HI; break; |
| 994 | case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC_PLT16_HA; break; |
| 995 | case BFD_RELOC_GPREL16: ppc_reloc = R_PPC_SDAREL16; break; |
| 996 | case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC_SECTOFF; break; |
| 997 | case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC_SECTOFF_LO; break; |
| 998 | case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC_SECTOFF_HI; break; |
| 999 | case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC_SECTOFF_HA; break; |
| 1000 | case BFD_RELOC_CTOR: ppc_reloc = R_PPC_ADDR32; break; |
| 1001 | case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC_TOC16; break; |
| 1002 | case BFD_RELOC_PPC_EMB_NADDR32: ppc_reloc = R_PPC_EMB_NADDR32; break; |
| 1003 | case BFD_RELOC_PPC_EMB_NADDR16: ppc_reloc = R_PPC_EMB_NADDR16; break; |
| 1004 | case BFD_RELOC_PPC_EMB_NADDR16_LO: ppc_reloc = R_PPC_EMB_NADDR16_LO; break; |
| 1005 | case BFD_RELOC_PPC_EMB_NADDR16_HI: ppc_reloc = R_PPC_EMB_NADDR16_HI; break; |
| 1006 | case BFD_RELOC_PPC_EMB_NADDR16_HA: ppc_reloc = R_PPC_EMB_NADDR16_HA; break; |
| 1007 | case BFD_RELOC_PPC_EMB_SDAI16: ppc_reloc = R_PPC_EMB_SDAI16; break; |
| 1008 | case BFD_RELOC_PPC_EMB_SDA2I16: ppc_reloc = R_PPC_EMB_SDA2I16; break; |
| 1009 | case BFD_RELOC_PPC_EMB_SDA2REL: ppc_reloc = R_PPC_EMB_SDA2REL; break; |
| 1010 | case BFD_RELOC_PPC_EMB_SDA21: ppc_reloc = R_PPC_EMB_SDA21; break; |
| 1011 | case BFD_RELOC_PPC_EMB_MRKREF: ppc_reloc = R_PPC_EMB_MRKREF; break; |
| 1012 | case BFD_RELOC_PPC_EMB_RELSEC16: ppc_reloc = R_PPC_EMB_RELSEC16; break; |
| 1013 | case BFD_RELOC_PPC_EMB_RELST_LO: ppc_reloc = R_PPC_EMB_RELST_LO; break; |
| 1014 | case BFD_RELOC_PPC_EMB_RELST_HI: ppc_reloc = R_PPC_EMB_RELST_HI; break; |
| 1015 | case BFD_RELOC_PPC_EMB_RELST_HA: ppc_reloc = R_PPC_EMB_RELST_HA; break; |
| 1016 | case BFD_RELOC_PPC_EMB_BIT_FLD: ppc_reloc = R_PPC_EMB_BIT_FLD; break; |
| 1017 | case BFD_RELOC_PPC_EMB_RELSDA: ppc_reloc = R_PPC_EMB_RELSDA; break; |
| 1018 | case BFD_RELOC_VTABLE_INHERIT: ppc_reloc = R_PPC_GNU_VTINHERIT; break; |
| 1019 | case BFD_RELOC_VTABLE_ENTRY: ppc_reloc = R_PPC_GNU_VTENTRY; break; |
| 1020 | } |
| 1021 | |
| 1022 | return ppc_elf_howto_table[ (int)ppc_reloc ]; |
| 1023 | }; |
| 1024 | |
| 1025 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
| 1026 | |
| 1027 | static void |
| 1028 | ppc_elf_info_to_howto (abfd, cache_ptr, dst) |
| 1029 | bfd *abfd; |
| 1030 | arelent *cache_ptr; |
| 1031 | Elf32_Internal_Rela *dst; |
| 1032 | { |
| 1033 | if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */ |
| 1034 | ppc_elf_howto_init (); |
| 1035 | |
| 1036 | BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); |
| 1037 | cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; |
| 1038 | } |
| 1039 | |
| 1040 | /* Handle the R_PPC_ADDR16_HA reloc. */ |
| 1041 | |
| 1042 | static bfd_reloc_status_type |
| 1043 | ppc_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1044 | output_bfd, error_message) |
| 1045 | bfd *abfd; |
| 1046 | arelent *reloc_entry; |
| 1047 | asymbol *symbol; |
| 1048 | PTR data; |
| 1049 | asection *input_section; |
| 1050 | bfd *output_bfd; |
| 1051 | char **error_message; |
| 1052 | { |
| 1053 | bfd_vma relocation; |
| 1054 | |
| 1055 | if (output_bfd != NULL) |
| 1056 | { |
| 1057 | reloc_entry->address += input_section->output_offset; |
| 1058 | return bfd_reloc_ok; |
| 1059 | } |
| 1060 | |
| 1061 | if (reloc_entry->address > input_section->_cooked_size) |
| 1062 | return bfd_reloc_outofrange; |
| 1063 | |
| 1064 | if (bfd_is_com_section (symbol->section)) |
| 1065 | relocation = 0; |
| 1066 | else |
| 1067 | relocation = symbol->value; |
| 1068 | |
| 1069 | relocation += symbol->section->output_section->vma; |
| 1070 | relocation += symbol->section->output_offset; |
| 1071 | relocation += reloc_entry->addend; |
| 1072 | |
| 1073 | reloc_entry->addend += (relocation & 0x8000) << 1; |
| 1074 | |
| 1075 | return bfd_reloc_continue; |
| 1076 | } |
| 1077 | |
| 1078 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
| 1079 | |
| 1080 | static boolean |
| 1081 | ppc_elf_set_private_flags (abfd, flags) |
| 1082 | bfd *abfd; |
| 1083 | flagword flags; |
| 1084 | { |
| 1085 | BFD_ASSERT (!elf_flags_init (abfd) |
| 1086 | || elf_elfheader (abfd)->e_flags == flags); |
| 1087 | |
| 1088 | elf_elfheader (abfd)->e_flags = flags; |
| 1089 | elf_flags_init (abfd) = true; |
| 1090 | return true; |
| 1091 | } |
| 1092 | |
| 1093 | /* Copy backend specific data from one object module to another */ |
| 1094 | static boolean |
| 1095 | ppc_elf_copy_private_bfd_data (ibfd, obfd) |
| 1096 | bfd *ibfd; |
| 1097 | bfd *obfd; |
| 1098 | { |
| 1099 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1100 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1101 | return true; |
| 1102 | |
| 1103 | BFD_ASSERT (!elf_flags_init (obfd) |
| 1104 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); |
| 1105 | |
| 1106 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
| 1107 | elf_flags_init (obfd) = true; |
| 1108 | return true; |
| 1109 | } |
| 1110 | |
| 1111 | /* Merge backend specific data from an object file to the output |
| 1112 | object file when linking */ |
| 1113 | static boolean |
| 1114 | ppc_elf_merge_private_bfd_data (ibfd, obfd) |
| 1115 | bfd *ibfd; |
| 1116 | bfd *obfd; |
| 1117 | { |
| 1118 | flagword old_flags; |
| 1119 | flagword new_flags; |
| 1120 | boolean error; |
| 1121 | |
| 1122 | /* Check if we have the same endianess */ |
| 1123 | if (ibfd->xvec->byteorder != obfd->xvec->byteorder |
| 1124 | && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) |
| 1125 | { |
| 1126 | const char *msg; |
| 1127 | |
| 1128 | if (bfd_big_endian (ibfd)) |
| 1129 | msg = _("%s: compiled for a big endian system and target is little endian"); |
| 1130 | else |
| 1131 | msg = _("%s: compiled for a little endian system and target is big endian"); |
| 1132 | |
| 1133 | (*_bfd_error_handler) (msg, bfd_get_filename (ibfd)); |
| 1134 | |
| 1135 | bfd_set_error (bfd_error_wrong_format); |
| 1136 | return false; |
| 1137 | } |
| 1138 | |
| 1139 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1140 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1141 | return true; |
| 1142 | |
| 1143 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 1144 | old_flags = elf_elfheader (obfd)->e_flags; |
| 1145 | if (!elf_flags_init (obfd)) /* First call, no flags set */ |
| 1146 | { |
| 1147 | elf_flags_init (obfd) = true; |
| 1148 | elf_elfheader (obfd)->e_flags = new_flags; |
| 1149 | } |
| 1150 | |
| 1151 | else if (new_flags == old_flags) /* Compatible flags are ok */ |
| 1152 | ; |
| 1153 | |
| 1154 | else /* Incompatible flags */ |
| 1155 | { |
| 1156 | /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked |
| 1157 | with either. */ |
| 1158 | error = false; |
| 1159 | if ((new_flags & EF_PPC_RELOCATABLE) != 0 |
| 1160 | && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) |
| 1161 | { |
| 1162 | error = true; |
| 1163 | (*_bfd_error_handler) |
| 1164 | (_("%s: compiled with -mrelocatable and linked with modules compiled normally"), |
| 1165 | bfd_get_filename (ibfd)); |
| 1166 | } |
| 1167 | else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 |
| 1168 | && (old_flags & EF_PPC_RELOCATABLE) != 0) |
| 1169 | { |
| 1170 | error = true; |
| 1171 | (*_bfd_error_handler) |
| 1172 | (_("%s: compiled normally and linked with modules compiled with -mrelocatable"), |
| 1173 | bfd_get_filename (ibfd)); |
| 1174 | } |
| 1175 | /* If -mrelocatable-lib is linked with an object without -mrelocatable-lib, turn off |
| 1176 | the -mrelocatable-lib, since at least one module isn't relocatable. */ |
| 1177 | else if ((old_flags & EF_PPC_RELOCATABLE_LIB) != 0 |
| 1178 | && (new_flags & EF_PPC_RELOCATABLE_LIB) == 0) |
| 1179 | elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; |
| 1180 | |
| 1181 | |
| 1182 | /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if any module uses it */ |
| 1183 | elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); |
| 1184 | |
| 1185 | new_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 1186 | old_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 1187 | |
| 1188 | /* Warn about any other mismatches */ |
| 1189 | if (new_flags != old_flags) |
| 1190 | { |
| 1191 | error = true; |
| 1192 | (*_bfd_error_handler) |
| 1193 | (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), |
| 1194 | bfd_get_filename (ibfd), (long)new_flags, (long)old_flags); |
| 1195 | } |
| 1196 | |
| 1197 | if (error) |
| 1198 | { |
| 1199 | bfd_set_error (bfd_error_bad_value); |
| 1200 | return false; |
| 1201 | } |
| 1202 | } |
| 1203 | |
| 1204 | return true; |
| 1205 | } |
| 1206 | |
| 1207 | \f |
| 1208 | /* Handle a PowerPC specific section when reading an object file. This |
| 1209 | is called when elfcode.h finds a section with an unknown type. */ |
| 1210 | |
| 1211 | static boolean |
| 1212 | ppc_elf_section_from_shdr (abfd, hdr, name) |
| 1213 | bfd *abfd; |
| 1214 | Elf32_Internal_Shdr *hdr; |
| 1215 | char *name; |
| 1216 | { |
| 1217 | asection *newsect; |
| 1218 | flagword flags; |
| 1219 | |
| 1220 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 1221 | return false; |
| 1222 | |
| 1223 | newsect = hdr->bfd_section; |
| 1224 | flags = bfd_get_section_flags (abfd, newsect); |
| 1225 | if (hdr->sh_flags & SHF_EXCLUDE) |
| 1226 | flags |= SEC_EXCLUDE; |
| 1227 | |
| 1228 | if (hdr->sh_type == SHT_ORDERED) |
| 1229 | flags |= SEC_SORT_ENTRIES; |
| 1230 | |
| 1231 | bfd_set_section_flags (abfd, newsect, flags); |
| 1232 | return true; |
| 1233 | } |
| 1234 | |
| 1235 | \f |
| 1236 | /* Set up any other section flags and such that may be necessary. */ |
| 1237 | |
| 1238 | static boolean |
| 1239 | ppc_elf_fake_sections (abfd, shdr, asect) |
| 1240 | bfd *abfd; |
| 1241 | Elf32_Internal_Shdr *shdr; |
| 1242 | asection *asect; |
| 1243 | { |
| 1244 | if ((asect->flags & SEC_EXCLUDE) != 0) |
| 1245 | shdr->sh_flags |= SHF_EXCLUDE; |
| 1246 | |
| 1247 | if ((asect->flags & SEC_SORT_ENTRIES) != 0) |
| 1248 | shdr->sh_type = SHT_ORDERED; |
| 1249 | |
| 1250 | return true; |
| 1251 | } |
| 1252 | |
| 1253 | \f |
| 1254 | /* Create a special linker section */ |
| 1255 | static elf_linker_section_t * |
| 1256 | ppc_elf_create_linker_section (abfd, info, which) |
| 1257 | bfd *abfd; |
| 1258 | struct bfd_link_info *info; |
| 1259 | enum elf_linker_section_enum which; |
| 1260 | { |
| 1261 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 1262 | elf_linker_section_t *lsect; |
| 1263 | |
| 1264 | /* Record the first bfd section that needs the special section */ |
| 1265 | if (!dynobj) |
| 1266 | dynobj = elf_hash_table (info)->dynobj = abfd; |
| 1267 | |
| 1268 | /* If this is the first time, create the section */ |
| 1269 | lsect = elf_linker_section (dynobj, which); |
| 1270 | if (!lsect) |
| 1271 | { |
| 1272 | elf_linker_section_t defaults; |
| 1273 | static elf_linker_section_t zero_section; |
| 1274 | |
| 1275 | defaults = zero_section; |
| 1276 | defaults.which = which; |
| 1277 | defaults.hole_written_p = false; |
| 1278 | defaults.alignment = 2; |
| 1279 | |
| 1280 | /* Both of these sections are (technically) created by the user |
| 1281 | putting data in them, so they shouldn't be marked |
| 1282 | SEC_LINKER_CREATED. |
| 1283 | |
| 1284 | The linker creates them so it has somewhere to attach their |
| 1285 | respective symbols. In fact, if they were empty it would |
| 1286 | be OK to leave the symbol set to 0 (or any random number), because |
| 1287 | the appropriate register should never be used. */ |
| 1288 | defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 1289 | | SEC_IN_MEMORY); |
| 1290 | |
| 1291 | switch (which) |
| 1292 | { |
| 1293 | default: |
| 1294 | (*_bfd_error_handler) (_("%s: Unknown special linker type %d"), |
| 1295 | bfd_get_filename (abfd), |
| 1296 | (int)which); |
| 1297 | |
| 1298 | bfd_set_error (bfd_error_bad_value); |
| 1299 | return (elf_linker_section_t *)0; |
| 1300 | |
| 1301 | case LINKER_SECTION_SDATA: /* .sdata/.sbss section */ |
| 1302 | defaults.name = ".sdata"; |
| 1303 | defaults.rel_name = ".rela.sdata"; |
| 1304 | defaults.bss_name = ".sbss"; |
| 1305 | defaults.sym_name = "_SDA_BASE_"; |
| 1306 | defaults.sym_offset = 32768; |
| 1307 | break; |
| 1308 | |
| 1309 | case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */ |
| 1310 | defaults.name = ".sdata2"; |
| 1311 | defaults.rel_name = ".rela.sdata2"; |
| 1312 | defaults.bss_name = ".sbss2"; |
| 1313 | defaults.sym_name = "_SDA2_BASE_"; |
| 1314 | defaults.sym_offset = 32768; |
| 1315 | defaults.flags |= SEC_READONLY; |
| 1316 | break; |
| 1317 | } |
| 1318 | |
| 1319 | lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults); |
| 1320 | } |
| 1321 | |
| 1322 | return lsect; |
| 1323 | } |
| 1324 | |
| 1325 | \f |
| 1326 | /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we need to bump up |
| 1327 | the number of section headers. */ |
| 1328 | |
| 1329 | static int |
| 1330 | ppc_elf_additional_program_headers (abfd) |
| 1331 | bfd *abfd; |
| 1332 | { |
| 1333 | asection *s; |
| 1334 | int ret; |
| 1335 | |
| 1336 | ret = 0; |
| 1337 | |
| 1338 | s = bfd_get_section_by_name (abfd, ".interp"); |
| 1339 | if (s != NULL) |
| 1340 | ++ret; |
| 1341 | |
| 1342 | s = bfd_get_section_by_name (abfd, ".sbss2"); |
| 1343 | if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) |
| 1344 | ++ret; |
| 1345 | |
| 1346 | s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); |
| 1347 | if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) |
| 1348 | ++ret; |
| 1349 | |
| 1350 | return ret; |
| 1351 | } |
| 1352 | |
| 1353 | /* Modify the segment map if needed */ |
| 1354 | |
| 1355 | static boolean |
| 1356 | ppc_elf_modify_segment_map (abfd) |
| 1357 | bfd *abfd; |
| 1358 | { |
| 1359 | return true; |
| 1360 | } |
| 1361 | \f |
| 1362 | /* We have to create .dynsbss and .rela.sbss here so that they get mapped |
| 1363 | to output sections (just like _bfd_elf_create_dynamic_sections has |
| 1364 | to create .dynbss and .rela.bss). */ |
| 1365 | |
| 1366 | static boolean |
| 1367 | ppc_elf_create_dynamic_sections (abfd, info) |
| 1368 | bfd *abfd; |
| 1369 | struct bfd_link_info *info; |
| 1370 | { |
| 1371 | register asection *s; |
| 1372 | flagword flags; |
| 1373 | |
| 1374 | if (!_bfd_elf_create_dynamic_sections(abfd, info)) |
| 1375 | return false; |
| 1376 | |
| 1377 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 1378 | | SEC_LINKER_CREATED); |
| 1379 | |
| 1380 | s = bfd_make_section (abfd, ".dynsbss"); |
| 1381 | if (s == NULL |
| 1382 | || ! bfd_set_section_flags (abfd, s, SEC_ALLOC)) |
| 1383 | return false; |
| 1384 | |
| 1385 | if (! info->shared) |
| 1386 | { |
| 1387 | s = bfd_make_section (abfd, ".rela.sbss"); |
| 1388 | if (s == NULL |
| 1389 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) |
| 1390 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 1391 | return false; |
| 1392 | } |
| 1393 | return true; |
| 1394 | } |
| 1395 | |
| 1396 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1397 | regular object. The current definition is in some section of the |
| 1398 | dynamic object, but we're not including those sections. We have to |
| 1399 | change the definition to something the rest of the link can |
| 1400 | understand. */ |
| 1401 | |
| 1402 | static boolean |
| 1403 | ppc_elf_adjust_dynamic_symbol (info, h) |
| 1404 | struct bfd_link_info *info; |
| 1405 | struct elf_link_hash_entry *h; |
| 1406 | { |
| 1407 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 1408 | asection *s; |
| 1409 | unsigned int power_of_two; |
| 1410 | bfd_vma plt_offset; |
| 1411 | |
| 1412 | #ifdef DEBUG |
| 1413 | fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", h->root.root.string); |
| 1414 | #endif |
| 1415 | |
| 1416 | /* Make sure we know what is going on here. */ |
| 1417 | BFD_ASSERT (dynobj != NULL |
| 1418 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| 1419 | || h->weakdef != NULL |
| 1420 | || ((h->elf_link_hash_flags |
| 1421 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 1422 | && (h->elf_link_hash_flags |
| 1423 | & ELF_LINK_HASH_REF_REGULAR) != 0 |
| 1424 | && (h->elf_link_hash_flags |
| 1425 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| 1426 | |
| 1427 | |
| 1428 | /* If this is a function, put it in the procedure linkage table. We |
| 1429 | will fill in the contents of the procedure linkage table later, |
| 1430 | when we know the address of the .got section. */ |
| 1431 | if (h->type == STT_FUNC |
| 1432 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 1433 | { |
| 1434 | if (! elf_hash_table (info)->dynamic_sections_created |
| 1435 | || ((!info->shared || info->symbolic || h->dynindx == -1) |
| 1436 | && (h->elf_link_hash_flags |
| 1437 | & ELF_LINK_HASH_DEF_REGULAR) != 0) |
| 1438 | || (info->shared && h->plt.refcount <= 0)) |
| 1439 | { |
| 1440 | /* A PLT entry is not required/allowed when: |
| 1441 | |
| 1442 | 1. We are not using ld.so; because then the PLT entry |
| 1443 | can't be set up, so we can't use one. |
| 1444 | |
| 1445 | 2. We know for certain that a symbol is defined in |
| 1446 | this object, because this object is the application, |
| 1447 | is linked with -Bsymbolic, or because the symbol is local. |
| 1448 | |
| 1449 | 3. GC has rendered the entry unused. |
| 1450 | Note, however, that in an executable all references to the |
| 1451 | symbol go to the PLT, so we can't turn it off in that case. |
| 1452 | ??? The correct thing to do here is to reference count |
| 1453 | all uses of the symbol, not just those to the GOT or PLT. */ |
| 1454 | h->plt.offset = (bfd_vma) -1; |
| 1455 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 1456 | return true; |
| 1457 | } |
| 1458 | |
| 1459 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1460 | if (h->dynindx == -1) |
| 1461 | { |
| 1462 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 1463 | return false; |
| 1464 | } |
| 1465 | BFD_ASSERT (h->dynindx != -1); |
| 1466 | |
| 1467 | s = bfd_get_section_by_name (dynobj, ".plt"); |
| 1468 | BFD_ASSERT (s != NULL); |
| 1469 | |
| 1470 | /* If this is the first .plt entry, make room for the special |
| 1471 | first entry. */ |
| 1472 | if (s->_raw_size == 0) |
| 1473 | s->_raw_size += PLT_INITIAL_ENTRY_SIZE; |
| 1474 | |
| 1475 | /* The PowerPC PLT is actually composed of two parts, the first part |
| 1476 | is 2 words (for a load and a jump), and then there is a remaining |
| 1477 | word available at the end. */ |
| 1478 | plt_offset = (PLT_INITIAL_ENTRY_SIZE |
| 1479 | + 8 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE)); |
| 1480 | |
| 1481 | /* If this symbol is not defined in a regular file, and we are |
| 1482 | not generating a shared library, then set the symbol to this |
| 1483 | location in the .plt. This is required to make function |
| 1484 | pointers compare as equal between the normal executable and |
| 1485 | the shared library. */ |
| 1486 | if (! info->shared |
| 1487 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1488 | { |
| 1489 | h->root.u.def.section = s; |
| 1490 | h->root.u.def.value = plt_offset; |
| 1491 | } |
| 1492 | |
| 1493 | h->plt.offset = plt_offset; |
| 1494 | |
| 1495 | /* Make room for this entry. */ |
| 1496 | s->_raw_size += PLT_ENTRY_SIZE; |
| 1497 | |
| 1498 | /* We also need to make an entry in the .rela.plt section. */ |
| 1499 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 1500 | BFD_ASSERT (s != NULL); |
| 1501 | s->_raw_size += sizeof (Elf32_External_Rela); |
| 1502 | |
| 1503 | return true; |
| 1504 | } |
| 1505 | |
| 1506 | /* If this is a weak symbol, and there is a real definition, the |
| 1507 | processor independent code will have arranged for us to see the |
| 1508 | real definition first, and we can just use the same value. */ |
| 1509 | if (h->weakdef != NULL) |
| 1510 | { |
| 1511 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 1512 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 1513 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 1514 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 1515 | return true; |
| 1516 | } |
| 1517 | |
| 1518 | /* This is a reference to a symbol defined by a dynamic object which |
| 1519 | is not a function. */ |
| 1520 | |
| 1521 | /* If we are creating a shared library, we must presume that the |
| 1522 | only references to the symbol are via the global offset table. |
| 1523 | For such cases we need not do anything here; the relocations will |
| 1524 | be handled correctly by relocate_section. */ |
| 1525 | if (info->shared) |
| 1526 | return true; |
| 1527 | |
| 1528 | /* We must allocate the symbol in our .dynbss section, which will |
| 1529 | become part of the .bss section of the executable. There will be |
| 1530 | an entry for this symbol in the .dynsym section. The dynamic |
| 1531 | object will contain position independent code, so all references |
| 1532 | from the dynamic object to this symbol will go through the global |
| 1533 | offset table. The dynamic linker will use the .dynsym entry to |
| 1534 | determine the address it must put in the global offset table, so |
| 1535 | both the dynamic object and the regular object will refer to the |
| 1536 | same memory location for the variable. |
| 1537 | |
| 1538 | Of course, if the symbol is sufficiently small, we must instead |
| 1539 | allocate it in .sbss. FIXME: It would be better to do this if and |
| 1540 | only if there were actually SDAREL relocs for that symbol. */ |
| 1541 | |
| 1542 | if (h->size <= elf_gp_size (dynobj)) |
| 1543 | s = bfd_get_section_by_name (dynobj, ".dynsbss"); |
| 1544 | else |
| 1545 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 1546 | BFD_ASSERT (s != NULL); |
| 1547 | |
| 1548 | /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to |
| 1549 | copy the initial value out of the dynamic object and into the |
| 1550 | runtime process image. We need to remember the offset into the |
| 1551 | .rela.bss section we are going to use. */ |
| 1552 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 1553 | { |
| 1554 | asection *srel; |
| 1555 | |
| 1556 | if (h->size <= elf_gp_size (dynobj)) |
| 1557 | srel = bfd_get_section_by_name (dynobj, ".rela.sbss"); |
| 1558 | else |
| 1559 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 1560 | BFD_ASSERT (srel != NULL); |
| 1561 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 1562 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 1563 | } |
| 1564 | |
| 1565 | /* We need to figure out the alignment required for this symbol. I |
| 1566 | have no idea how ELF linkers handle this. */ |
| 1567 | power_of_two = bfd_log2 (h->size); |
| 1568 | if (power_of_two > 4) |
| 1569 | power_of_two = 4; |
| 1570 | |
| 1571 | /* Apply the required alignment. */ |
| 1572 | s->_raw_size = BFD_ALIGN (s->_raw_size, |
| 1573 | (bfd_size_type) (1 << power_of_two)); |
| 1574 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 1575 | { |
| 1576 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 1577 | return false; |
| 1578 | } |
| 1579 | |
| 1580 | /* Define the symbol as being at this point in the section. */ |
| 1581 | h->root.u.def.section = s; |
| 1582 | h->root.u.def.value = s->_raw_size; |
| 1583 | |
| 1584 | /* Increment the section size to make room for the symbol. */ |
| 1585 | s->_raw_size += h->size; |
| 1586 | |
| 1587 | return true; |
| 1588 | } |
| 1589 | |
| 1590 | \f |
| 1591 | /* Increment the index of a dynamic symbol by a given amount. Called |
| 1592 | via elf_link_hash_traverse. */ |
| 1593 | |
| 1594 | static boolean |
| 1595 | ppc_elf_adjust_dynindx (h, cparg) |
| 1596 | struct elf_link_hash_entry *h; |
| 1597 | PTR cparg; |
| 1598 | { |
| 1599 | int *cp = (int *) cparg; |
| 1600 | |
| 1601 | #ifdef DEBUG |
| 1602 | fprintf (stderr, "ppc_elf_adjust_dynindx called, h->dynindx = %d, *cp = %d\n", h->dynindx, *cp); |
| 1603 | #endif |
| 1604 | |
| 1605 | if (h->dynindx != -1) |
| 1606 | h->dynindx += *cp; |
| 1607 | |
| 1608 | return true; |
| 1609 | } |
| 1610 | |
| 1611 | \f |
| 1612 | /* Set the sizes of the dynamic sections. */ |
| 1613 | |
| 1614 | static boolean |
| 1615 | ppc_elf_size_dynamic_sections (output_bfd, info) |
| 1616 | bfd *output_bfd; |
| 1617 | struct bfd_link_info *info; |
| 1618 | { |
| 1619 | bfd *dynobj; |
| 1620 | asection *s; |
| 1621 | boolean plt; |
| 1622 | boolean relocs; |
| 1623 | boolean reltext; |
| 1624 | |
| 1625 | #ifdef DEBUG |
| 1626 | fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); |
| 1627 | #endif |
| 1628 | |
| 1629 | dynobj = elf_hash_table (info)->dynobj; |
| 1630 | BFD_ASSERT (dynobj != NULL); |
| 1631 | |
| 1632 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1633 | { |
| 1634 | /* Set the contents of the .interp section to the interpreter. */ |
| 1635 | if (! info->shared) |
| 1636 | { |
| 1637 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 1638 | BFD_ASSERT (s != NULL); |
| 1639 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 1640 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 1641 | } |
| 1642 | } |
| 1643 | else |
| 1644 | { |
| 1645 | /* We may have created entries in the .rela.got, .rela.sdata, and |
| 1646 | .rela.sdata2 sections. However, if we are not creating the |
| 1647 | dynamic sections, we will not actually use these entries. Reset |
| 1648 | the size of .rela.got, et al, which will cause it to get |
| 1649 | stripped from the output file below. */ |
| 1650 | static char *rela_sections[] = { ".rela.got", ".rela.sdata", |
| 1651 | ".rela.sdata2", ".rela.sbss", |
| 1652 | (char *)0 }; |
| 1653 | char **p; |
| 1654 | |
| 1655 | for (p = rela_sections; *p != (char *)0; p++) |
| 1656 | { |
| 1657 | s = bfd_get_section_by_name (dynobj, *p); |
| 1658 | if (s != NULL) |
| 1659 | s->_raw_size = 0; |
| 1660 | } |
| 1661 | } |
| 1662 | |
| 1663 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 1664 | determined the sizes of the various dynamic sections. Allocate |
| 1665 | memory for them. */ |
| 1666 | plt = false; |
| 1667 | relocs = false; |
| 1668 | reltext = false; |
| 1669 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 1670 | { |
| 1671 | const char *name; |
| 1672 | boolean strip; |
| 1673 | |
| 1674 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 1675 | continue; |
| 1676 | |
| 1677 | /* It's OK to base decisions on the section name, because none |
| 1678 | of the dynobj section names depend upon the input files. */ |
| 1679 | name = bfd_get_section_name (dynobj, s); |
| 1680 | |
| 1681 | strip = false; |
| 1682 | |
| 1683 | if (strcmp (name, ".plt") == 0) |
| 1684 | { |
| 1685 | if (s->_raw_size == 0) |
| 1686 | { |
| 1687 | /* Strip this section if we don't need it; see the |
| 1688 | comment below. */ |
| 1689 | strip = true; |
| 1690 | } |
| 1691 | else |
| 1692 | { |
| 1693 | /* Remember whether there is a PLT. */ |
| 1694 | plt = true; |
| 1695 | } |
| 1696 | } |
| 1697 | else if (strncmp (name, ".rela", 5) == 0) |
| 1698 | { |
| 1699 | if (s->_raw_size == 0) |
| 1700 | { |
| 1701 | /* If we don't need this section, strip it from the |
| 1702 | output file. This is mostly to handle .rela.bss and |
| 1703 | .rela.plt. We must create both sections in |
| 1704 | create_dynamic_sections, because they must be created |
| 1705 | before the linker maps input sections to output |
| 1706 | sections. The linker does that before |
| 1707 | adjust_dynamic_symbol is called, and it is that |
| 1708 | function which decides whether anything needs to go |
| 1709 | into these sections. */ |
| 1710 | strip = true; |
| 1711 | } |
| 1712 | else |
| 1713 | { |
| 1714 | asection *target; |
| 1715 | const char *outname; |
| 1716 | |
| 1717 | /* Remember whether there are any relocation sections. */ |
| 1718 | relocs = true; |
| 1719 | |
| 1720 | /* If this relocation section applies to a read only |
| 1721 | section, then we probably need a DT_TEXTREL entry. */ |
| 1722 | outname = bfd_get_section_name (output_bfd, |
| 1723 | s->output_section); |
| 1724 | target = bfd_get_section_by_name (output_bfd, outname + 5); |
| 1725 | if (target != NULL |
| 1726 | && (target->flags & SEC_READONLY) != 0 |
| 1727 | && (target->flags & SEC_ALLOC) != 0) |
| 1728 | reltext = true; |
| 1729 | |
| 1730 | /* We use the reloc_count field as a counter if we need |
| 1731 | to copy relocs into the output file. */ |
| 1732 | s->reloc_count = 0; |
| 1733 | } |
| 1734 | } |
| 1735 | else if (strcmp (name, ".got") != 0 |
| 1736 | && strcmp (name, ".sdata") != 0 |
| 1737 | && strcmp (name, ".sdata2") != 0) |
| 1738 | { |
| 1739 | /* It's not one of our sections, so don't allocate space. */ |
| 1740 | continue; |
| 1741 | } |
| 1742 | |
| 1743 | if (strip) |
| 1744 | { |
| 1745 | asection **spp; |
| 1746 | |
| 1747 | for (spp = &s->output_section->owner->sections; |
| 1748 | *spp != s->output_section; |
| 1749 | spp = &(*spp)->next) |
| 1750 | ; |
| 1751 | *spp = s->output_section->next; |
| 1752 | --s->output_section->owner->section_count; |
| 1753 | |
| 1754 | continue; |
| 1755 | } |
| 1756 | |
| 1757 | /* Allocate memory for the section contents. */ |
| 1758 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| 1759 | if (s->contents == NULL && s->_raw_size != 0) |
| 1760 | return false; |
| 1761 | } |
| 1762 | |
| 1763 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1764 | { |
| 1765 | /* Add some entries to the .dynamic section. We fill in the |
| 1766 | values later, in ppc_elf_finish_dynamic_sections, but we |
| 1767 | must add the entries now so that we get the correct size for |
| 1768 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 1769 | dynamic linker and used by the debugger. */ |
| 1770 | if (! info->shared) |
| 1771 | { |
| 1772 | if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) |
| 1773 | return false; |
| 1774 | } |
| 1775 | |
| 1776 | if (plt) |
| 1777 | { |
| 1778 | if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) |
| 1779 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| 1780 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA) |
| 1781 | || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) |
| 1782 | return false; |
| 1783 | } |
| 1784 | |
| 1785 | if (relocs) |
| 1786 | { |
| 1787 | if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0) |
| 1788 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0) |
| 1789 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT, |
| 1790 | sizeof (Elf32_External_Rela))) |
| 1791 | return false; |
| 1792 | } |
| 1793 | |
| 1794 | if (reltext) |
| 1795 | { |
| 1796 | if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) |
| 1797 | return false; |
| 1798 | } |
| 1799 | } |
| 1800 | |
| 1801 | /* If we are generating a shared library, we generate a section |
| 1802 | symbol for each output section. These are local symbols, which |
| 1803 | means that they must come first in the dynamic symbol table. |
| 1804 | That means we must increment the dynamic symbol index of every |
| 1805 | other dynamic symbol. |
| 1806 | |
| 1807 | FIXME: We assume that there will never be relocations to |
| 1808 | locations in linker-created sections that do not have |
| 1809 | externally-visible names. Instead, we should work out precisely |
| 1810 | which sections relocations are targetted at. */ |
| 1811 | if (info->shared) |
| 1812 | { |
| 1813 | int c; |
| 1814 | |
| 1815 | for (c = 0, s = output_bfd->sections; s != NULL; s = s->next) |
| 1816 | { |
| 1817 | if ((s->flags & SEC_LINKER_CREATED) != 0 |
| 1818 | || (s->flags & SEC_ALLOC) == 0) |
| 1819 | { |
| 1820 | elf_section_data (s)->dynindx = -1; |
| 1821 | continue; |
| 1822 | } |
| 1823 | |
| 1824 | /* These symbols will have no names, so we don't need to |
| 1825 | fiddle with dynstr_index. */ |
| 1826 | |
| 1827 | elf_section_data (s)->dynindx = c + 1; |
| 1828 | |
| 1829 | c++; |
| 1830 | } |
| 1831 | |
| 1832 | elf_link_hash_traverse (elf_hash_table (info), |
| 1833 | ppc_elf_adjust_dynindx, |
| 1834 | (PTR) &c); |
| 1835 | elf_hash_table (info)->dynsymcount += c; |
| 1836 | } |
| 1837 | |
| 1838 | return true; |
| 1839 | } |
| 1840 | |
| 1841 | \f |
| 1842 | /* Look through the relocs for a section during the first phase, and |
| 1843 | allocate space in the global offset table or procedure linkage |
| 1844 | table. */ |
| 1845 | |
| 1846 | static boolean |
| 1847 | ppc_elf_check_relocs (abfd, info, sec, relocs) |
| 1848 | bfd *abfd; |
| 1849 | struct bfd_link_info *info; |
| 1850 | asection *sec; |
| 1851 | const Elf_Internal_Rela *relocs; |
| 1852 | { |
| 1853 | bfd *dynobj; |
| 1854 | Elf_Internal_Shdr *symtab_hdr; |
| 1855 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| 1856 | const Elf_Internal_Rela *rel; |
| 1857 | const Elf_Internal_Rela *rel_end; |
| 1858 | bfd_signed_vma *local_got_refcounts; |
| 1859 | elf_linker_section_t *sdata; |
| 1860 | elf_linker_section_t *sdata2; |
| 1861 | asection *sreloc; |
| 1862 | asection *sgot = NULL; |
| 1863 | asection *srelgot = NULL; |
| 1864 | |
| 1865 | if (info->relocateable) |
| 1866 | return true; |
| 1867 | |
| 1868 | #ifdef DEBUG |
| 1869 | fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n", |
| 1870 | bfd_get_section_name (abfd, sec), |
| 1871 | bfd_get_filename (abfd)); |
| 1872 | #endif |
| 1873 | |
| 1874 | /* Create the linker generated sections all the time so that the |
| 1875 | special symbols are created. */ |
| 1876 | |
| 1877 | if ((sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA)) == NULL) |
| 1878 | { |
| 1879 | sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA); |
| 1880 | if (!sdata) |
| 1881 | return false; |
| 1882 | } |
| 1883 | |
| 1884 | |
| 1885 | if ((sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2)) == NULL) |
| 1886 | { |
| 1887 | sdata2 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA2); |
| 1888 | if (!sdata2) |
| 1889 | return false; |
| 1890 | } |
| 1891 | |
| 1892 | dynobj = elf_hash_table (info)->dynobj; |
| 1893 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1894 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 1895 | |
| 1896 | sym_hashes = elf_sym_hashes (abfd); |
| 1897 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); |
| 1898 | if (!elf_bad_symtab (abfd)) |
| 1899 | sym_hashes_end -= symtab_hdr->sh_info; |
| 1900 | |
| 1901 | sreloc = NULL; |
| 1902 | |
| 1903 | rel_end = relocs + sec->reloc_count; |
| 1904 | for (rel = relocs; rel < rel_end; rel++) |
| 1905 | { |
| 1906 | unsigned long r_symndx; |
| 1907 | struct elf_link_hash_entry *h; |
| 1908 | |
| 1909 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1910 | if (r_symndx < symtab_hdr->sh_info) |
| 1911 | h = NULL; |
| 1912 | else |
| 1913 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1914 | |
| 1915 | /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. |
| 1916 | This shows up in particular in an R_PPC_ADDR32 in the eabi |
| 1917 | startup code. */ |
| 1918 | if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 1919 | { |
| 1920 | if (sgot == NULL) |
| 1921 | { |
| 1922 | if (dynobj == NULL) |
| 1923 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 1924 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 1925 | return false; |
| 1926 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1927 | BFD_ASSERT (sgot != NULL); |
| 1928 | } |
| 1929 | } |
| 1930 | |
| 1931 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1932 | { |
| 1933 | /* GOT16 relocations */ |
| 1934 | case R_PPC_GOT16: |
| 1935 | case R_PPC_GOT16_LO: |
| 1936 | case R_PPC_GOT16_HI: |
| 1937 | case R_PPC_GOT16_HA: |
| 1938 | /* This symbol requires a global offset table entry. */ |
| 1939 | |
| 1940 | if (sgot == NULL) |
| 1941 | { |
| 1942 | if (dynobj == NULL) |
| 1943 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 1944 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 1945 | return false; |
| 1946 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1947 | BFD_ASSERT (sgot != NULL); |
| 1948 | } |
| 1949 | |
| 1950 | if (srelgot == NULL |
| 1951 | && (h != NULL || info->shared)) |
| 1952 | { |
| 1953 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1954 | if (srelgot == NULL) |
| 1955 | { |
| 1956 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 1957 | if (srelgot == NULL |
| 1958 | || ! bfd_set_section_flags (dynobj, srelgot, |
| 1959 | (SEC_ALLOC |
| 1960 | | SEC_LOAD |
| 1961 | | SEC_HAS_CONTENTS |
| 1962 | | SEC_IN_MEMORY |
| 1963 | | SEC_LINKER_CREATED |
| 1964 | | SEC_READONLY)) |
| 1965 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 1966 | return false; |
| 1967 | } |
| 1968 | } |
| 1969 | |
| 1970 | if (h != NULL) |
| 1971 | { |
| 1972 | if (h->got.refcount == -1) |
| 1973 | { |
| 1974 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1975 | if (h->dynindx == -1) |
| 1976 | if (!bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 1977 | return false; |
| 1978 | |
| 1979 | /* Allocate space in the .got. */ |
| 1980 | sgot->_raw_size += 4; |
| 1981 | /* Allocate relocation space. */ |
| 1982 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 1983 | |
| 1984 | h->got.refcount = 1; |
| 1985 | } |
| 1986 | else |
| 1987 | h->got.refcount++; |
| 1988 | } |
| 1989 | else |
| 1990 | { |
| 1991 | /* This is a global offset table entry for a local symbol. */ |
| 1992 | if (local_got_refcounts == NULL) |
| 1993 | { |
| 1994 | size_t size; |
| 1995 | register unsigned int i; |
| 1996 | |
| 1997 | size = symtab_hdr->sh_info * sizeof (bfd_signed_vma); |
| 1998 | local_got_refcounts = (bfd_signed_vma *) |
| 1999 | bfd_alloc (abfd, size); |
| 2000 | if (local_got_refcounts == NULL) |
| 2001 | return false; |
| 2002 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 2003 | memset (local_got_refcounts, -1, size); |
| 2004 | } |
| 2005 | if (local_got_refcounts[r_symndx] == -1) |
| 2006 | { |
| 2007 | sgot->_raw_size += 4; |
| 2008 | |
| 2009 | /* If we are generating a shared object, we need to |
| 2010 | output a R_PPC_RELATIVE reloc so that the |
| 2011 | dynamic linker can adjust this GOT entry. */ |
| 2012 | if (info->shared) |
| 2013 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 2014 | |
| 2015 | local_got_refcounts[r_symndx] = 1; |
| 2016 | } |
| 2017 | else |
| 2018 | local_got_refcounts[r_symndx]++; |
| 2019 | } |
| 2020 | break; |
| 2021 | |
| 2022 | /* Indirect .sdata relocation */ |
| 2023 | case R_PPC_EMB_SDAI16: |
| 2024 | if (info->shared) |
| 2025 | { |
| 2026 | ((*_bfd_error_handler) |
| 2027 | (_("%s: relocation %s cannot be used when making a shared object"), |
| 2028 | bfd_get_filename (abfd), "R_PPC_EMB_SDAI16")); |
| 2029 | return false; |
| 2030 | } |
| 2031 | |
| 2032 | if (srelgot == NULL && (h != NULL || info->shared)) |
| 2033 | { |
| 2034 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2035 | if (srelgot == NULL) |
| 2036 | { |
| 2037 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 2038 | if (srelgot == NULL |
| 2039 | || ! bfd_set_section_flags (dynobj, srelgot, |
| 2040 | (SEC_ALLOC |
| 2041 | | SEC_LOAD |
| 2042 | | SEC_HAS_CONTENTS |
| 2043 | | SEC_IN_MEMORY |
| 2044 | | SEC_LINKER_CREATED |
| 2045 | | SEC_READONLY)) |
| 2046 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 2047 | return false; |
| 2048 | } |
| 2049 | } |
| 2050 | |
| 2051 | if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata, h, rel)) |
| 2052 | return false; |
| 2053 | |
| 2054 | break; |
| 2055 | |
| 2056 | /* Indirect .sdata2 relocation */ |
| 2057 | case R_PPC_EMB_SDA2I16: |
| 2058 | if (info->shared) |
| 2059 | { |
| 2060 | ((*_bfd_error_handler) |
| 2061 | (_("%s: relocation %s cannot be used when making a shared object"), |
| 2062 | bfd_get_filename (abfd), "R_PPC_EMB_SDA2I16")); |
| 2063 | return false; |
| 2064 | } |
| 2065 | |
| 2066 | if (srelgot == NULL && (h != NULL || info->shared)) |
| 2067 | { |
| 2068 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2069 | if (srelgot == NULL) |
| 2070 | { |
| 2071 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 2072 | if (srelgot == NULL |
| 2073 | || ! bfd_set_section_flags (dynobj, srelgot, |
| 2074 | (SEC_ALLOC |
| 2075 | | SEC_LOAD |
| 2076 | | SEC_HAS_CONTENTS |
| 2077 | | SEC_IN_MEMORY |
| 2078 | | SEC_LINKER_CREATED |
| 2079 | | SEC_READONLY)) |
| 2080 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 2081 | return false; |
| 2082 | } |
| 2083 | } |
| 2084 | |
| 2085 | if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata2, h, rel)) |
| 2086 | return false; |
| 2087 | |
| 2088 | break; |
| 2089 | |
| 2090 | case R_PPC_SDAREL16: |
| 2091 | case R_PPC_EMB_SDA2REL: |
| 2092 | case R_PPC_EMB_SDA21: |
| 2093 | if (info->shared) |
| 2094 | { |
| 2095 | ((*_bfd_error_handler) |
| 2096 | (_("%s: relocation %s cannot be used when making a shared object"), |
| 2097 | bfd_get_filename (abfd), |
| 2098 | ppc_elf_howto_table[(int)ELF32_R_TYPE (rel->r_info)]->name)); |
| 2099 | return false; |
| 2100 | } |
| 2101 | break; |
| 2102 | |
| 2103 | case R_PPC_PLT32: |
| 2104 | case R_PPC_PLTREL24: |
| 2105 | case R_PPC_PLT16_LO: |
| 2106 | case R_PPC_PLT16_HI: |
| 2107 | case R_PPC_PLT16_HA: |
| 2108 | #ifdef DEBUG |
| 2109 | fprintf (stderr, "Reloc requires a PLT entry\n"); |
| 2110 | #endif |
| 2111 | /* This symbol requires a procedure linkage table entry. We |
| 2112 | actually build the entry in adjust_dynamic_symbol, |
| 2113 | because this might be a case of linking PIC code without |
| 2114 | linking in any dynamic objects, in which case we don't |
| 2115 | need to generate a procedure linkage table after all. */ |
| 2116 | |
| 2117 | if (h == NULL) |
| 2118 | { |
| 2119 | /* It does not make sense to have a procedure linkage |
| 2120 | table entry for a local symbol. */ |
| 2121 | bfd_set_error (bfd_error_bad_value); |
| 2122 | return false; |
| 2123 | } |
| 2124 | |
| 2125 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 2126 | if (h->dynindx == -1) |
| 2127 | { |
| 2128 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 2129 | return false; |
| 2130 | } |
| 2131 | if (h->plt.refcount == -1) |
| 2132 | { |
| 2133 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 2134 | h->plt.refcount = 1; |
| 2135 | } |
| 2136 | else |
| 2137 | h->plt.refcount++; |
| 2138 | break; |
| 2139 | |
| 2140 | /* The following relocations don't need to propagate the |
| 2141 | relocation if linking a shared object since they are |
| 2142 | section relative. */ |
| 2143 | case R_PPC_SECTOFF: |
| 2144 | case R_PPC_SECTOFF_LO: |
| 2145 | case R_PPC_SECTOFF_HI: |
| 2146 | case R_PPC_SECTOFF_HA: |
| 2147 | break; |
| 2148 | |
| 2149 | /* This refers only to functions defined in the shared library */ |
| 2150 | case R_PPC_LOCAL24PC: |
| 2151 | break; |
| 2152 | |
| 2153 | /* This relocation describes the C++ object vtable hierarchy. |
| 2154 | Reconstruct it for later use during GC. */ |
| 2155 | case R_PPC_GNU_VTINHERIT: |
| 2156 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 2157 | return false; |
| 2158 | break; |
| 2159 | |
| 2160 | /* This relocation describes which C++ vtable entries are actually |
| 2161 | used. Record for later use during GC. */ |
| 2162 | case R_PPC_GNU_VTENTRY: |
| 2163 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 2164 | return false; |
| 2165 | break; |
| 2166 | |
| 2167 | /* When creating a shared object, we must copy these |
| 2168 | relocs into the output file. We create a reloc |
| 2169 | section in dynobj and make room for the reloc. */ |
| 2170 | case R_PPC_REL24: |
| 2171 | case R_PPC_REL14: |
| 2172 | case R_PPC_REL14_BRTAKEN: |
| 2173 | case R_PPC_REL14_BRNTAKEN: |
| 2174 | case R_PPC_REL32: |
| 2175 | if (h == NULL |
| 2176 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2177 | break; |
| 2178 | /* fall through */ |
| 2179 | |
| 2180 | default: |
| 2181 | if (info->shared) |
| 2182 | { |
| 2183 | #ifdef DEBUG |
| 2184 | fprintf (stderr, "ppc_elf_check_relocs need to create relocation for %s\n", |
| 2185 | (h && h->root.root.string) ? h->root.root.string : "<unknown>"); |
| 2186 | #endif |
| 2187 | if (sreloc == NULL) |
| 2188 | { |
| 2189 | const char *name; |
| 2190 | |
| 2191 | name = (bfd_elf_string_from_elf_section |
| 2192 | (abfd, |
| 2193 | elf_elfheader (abfd)->e_shstrndx, |
| 2194 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 2195 | if (name == NULL) |
| 2196 | return false; |
| 2197 | |
| 2198 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 2199 | && strcmp (bfd_get_section_name (abfd, sec), |
| 2200 | name + 5) == 0); |
| 2201 | |
| 2202 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 2203 | if (sreloc == NULL) |
| 2204 | { |
| 2205 | flagword flags; |
| 2206 | |
| 2207 | sreloc = bfd_make_section (dynobj, name); |
| 2208 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 2209 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 2210 | if ((sec->flags & SEC_ALLOC) != 0) |
| 2211 | flags |= SEC_ALLOC | SEC_LOAD; |
| 2212 | if (sreloc == NULL |
| 2213 | || ! bfd_set_section_flags (dynobj, sreloc, flags) |
| 2214 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) |
| 2215 | return false; |
| 2216 | } |
| 2217 | } |
| 2218 | |
| 2219 | sreloc->_raw_size += sizeof (Elf32_External_Rela); |
| 2220 | |
| 2221 | /* FIXME: We should here do what the m68k and i386 |
| 2222 | backends do: if the reloc is pc-relative, record it |
| 2223 | in case it turns out that the reloc is unnecessary |
| 2224 | because the symbol is forced local by versioning or |
| 2225 | we are linking with -Bdynamic. Fortunately this |
| 2226 | case is not frequent. */ |
| 2227 | } |
| 2228 | |
| 2229 | break; |
| 2230 | } |
| 2231 | } |
| 2232 | |
| 2233 | return true; |
| 2234 | } |
| 2235 | |
| 2236 | /* Return the section that should be marked against GC for a given |
| 2237 | relocation. */ |
| 2238 | |
| 2239 | static asection * |
| 2240 | ppc_elf_gc_mark_hook (abfd, info, rel, h, sym) |
| 2241 | bfd *abfd; |
| 2242 | struct bfd_link_info *info; |
| 2243 | Elf_Internal_Rela *rel; |
| 2244 | struct elf_link_hash_entry *h; |
| 2245 | Elf_Internal_Sym *sym; |
| 2246 | { |
| 2247 | if (h != NULL) |
| 2248 | { |
| 2249 | switch (ELF32_R_TYPE (rel->r_info)) |
| 2250 | { |
| 2251 | case R_PPC_GNU_VTINHERIT: |
| 2252 | case R_PPC_GNU_VTENTRY: |
| 2253 | break; |
| 2254 | |
| 2255 | default: |
| 2256 | switch (h->root.type) |
| 2257 | { |
| 2258 | case bfd_link_hash_defined: |
| 2259 | case bfd_link_hash_defweak: |
| 2260 | return h->root.u.def.section; |
| 2261 | |
| 2262 | case bfd_link_hash_common: |
| 2263 | return h->root.u.c.p->section; |
| 2264 | } |
| 2265 | } |
| 2266 | } |
| 2267 | else |
| 2268 | { |
| 2269 | if (!(elf_bad_symtab (abfd) |
| 2270 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) |
| 2271 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) |
| 2272 | && sym->st_shndx != SHN_COMMON)) |
| 2273 | { |
| 2274 | return bfd_section_from_elf_index (abfd, sym->st_shndx); |
| 2275 | } |
| 2276 | } |
| 2277 | |
| 2278 | return NULL; |
| 2279 | } |
| 2280 | |
| 2281 | /* Update the got entry reference counts for the section being removed. */ |
| 2282 | |
| 2283 | static boolean |
| 2284 | ppc_elf_gc_sweep_hook (abfd, info, sec, relocs) |
| 2285 | bfd *abfd; |
| 2286 | struct bfd_link_info *info; |
| 2287 | asection *sec; |
| 2288 | const Elf_Internal_Rela *relocs; |
| 2289 | { |
| 2290 | Elf_Internal_Shdr *symtab_hdr; |
| 2291 | struct elf_link_hash_entry **sym_hashes; |
| 2292 | bfd_signed_vma *local_got_refcounts; |
| 2293 | const Elf_Internal_Rela *rel, *relend; |
| 2294 | unsigned long r_symndx; |
| 2295 | struct elf_link_hash_entry *h; |
| 2296 | |
| 2297 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2298 | sym_hashes = elf_sym_hashes (abfd); |
| 2299 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 2300 | |
| 2301 | relend = relocs + sec->reloc_count; |
| 2302 | for (rel = relocs; rel < relend; rel++) |
| 2303 | switch (ELF32_R_TYPE (rel->r_info)) |
| 2304 | { |
| 2305 | case R_PPC_GOT16: |
| 2306 | case R_PPC_GOT16_LO: |
| 2307 | case R_PPC_GOT16_HI: |
| 2308 | case R_PPC_GOT16_HA: |
| 2309 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2310 | if (r_symndx >= symtab_hdr->sh_info) |
| 2311 | { |
| 2312 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2313 | if (h->got.refcount > 0) |
| 2314 | h->got.refcount--; |
| 2315 | } |
| 2316 | else |
| 2317 | { |
| 2318 | if (local_got_refcounts[r_symndx] > 0) |
| 2319 | local_got_refcounts[r_symndx]--; |
| 2320 | } |
| 2321 | break; |
| 2322 | |
| 2323 | case R_PPC_PLT32: |
| 2324 | case R_PPC_PLTREL24: |
| 2325 | case R_PPC_PLT16_LO: |
| 2326 | case R_PPC_PLT16_HI: |
| 2327 | case R_PPC_PLT16_HA: |
| 2328 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2329 | if (r_symndx >= symtab_hdr->sh_info) |
| 2330 | { |
| 2331 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2332 | if (h->plt.refcount > 0) |
| 2333 | h->plt.refcount--; |
| 2334 | } |
| 2335 | break; |
| 2336 | |
| 2337 | default: |
| 2338 | break; |
| 2339 | } |
| 2340 | |
| 2341 | return true; |
| 2342 | } |
| 2343 | \f |
| 2344 | /* Hook called by the linker routine which adds symbols from an object |
| 2345 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 2346 | |
| 2347 | /*ARGSUSED*/ |
| 2348 | static boolean |
| 2349 | ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| 2350 | bfd *abfd; |
| 2351 | struct bfd_link_info *info; |
| 2352 | const Elf_Internal_Sym *sym; |
| 2353 | const char **namep; |
| 2354 | flagword *flagsp; |
| 2355 | asection **secp; |
| 2356 | bfd_vma *valp; |
| 2357 | { |
| 2358 | if (sym->st_shndx == SHN_COMMON |
| 2359 | && !info->relocateable |
| 2360 | && sym->st_size <= (bfd_vma) bfd_get_gp_size (abfd)) |
| 2361 | { |
| 2362 | /* Common symbols less than or equal to -G nn bytes are automatically |
| 2363 | put into .sdata. */ |
| 2364 | elf_linker_section_t *sdata |
| 2365 | = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA); |
| 2366 | |
| 2367 | if (!sdata->bss_section) |
| 2368 | { |
| 2369 | /* We don't go through bfd_make_section, because we don't |
| 2370 | want to attach this common section to DYNOBJ. The linker |
| 2371 | will move the symbols to the appropriate output section |
| 2372 | when it defines common symbols. */ |
| 2373 | sdata->bss_section = ((asection *) |
| 2374 | bfd_zalloc (abfd, sizeof (asection))); |
| 2375 | if (sdata->bss_section == NULL) |
| 2376 | return false; |
| 2377 | sdata->bss_section->name = sdata->bss_name; |
| 2378 | sdata->bss_section->flags = SEC_IS_COMMON; |
| 2379 | sdata->bss_section->output_section = sdata->bss_section; |
| 2380 | sdata->bss_section->symbol = |
| 2381 | (asymbol *) bfd_zalloc (abfd, sizeof (asymbol)); |
| 2382 | sdata->bss_section->symbol_ptr_ptr = |
| 2383 | (asymbol **) bfd_zalloc (abfd, sizeof (asymbol *)); |
| 2384 | if (sdata->bss_section->symbol == NULL |
| 2385 | || sdata->bss_section->symbol_ptr_ptr == NULL) |
| 2386 | return false; |
| 2387 | sdata->bss_section->symbol->name = sdata->bss_name; |
| 2388 | sdata->bss_section->symbol->flags = BSF_SECTION_SYM; |
| 2389 | sdata->bss_section->symbol->section = sdata->bss_section; |
| 2390 | *sdata->bss_section->symbol_ptr_ptr = sdata->bss_section->symbol; |
| 2391 | } |
| 2392 | |
| 2393 | *secp = sdata->bss_section; |
| 2394 | *valp = sym->st_size; |
| 2395 | } |
| 2396 | |
| 2397 | return true; |
| 2398 | } |
| 2399 | |
| 2400 | \f |
| 2401 | /* Finish up dynamic symbol handling. We set the contents of various |
| 2402 | dynamic sections here. */ |
| 2403 | |
| 2404 | static boolean |
| 2405 | ppc_elf_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 2406 | bfd *output_bfd; |
| 2407 | struct bfd_link_info *info; |
| 2408 | struct elf_link_hash_entry *h; |
| 2409 | Elf_Internal_Sym *sym; |
| 2410 | { |
| 2411 | bfd *dynobj; |
| 2412 | |
| 2413 | #ifdef DEBUG |
| 2414 | fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", |
| 2415 | h->root.root.string); |
| 2416 | #endif |
| 2417 | |
| 2418 | dynobj = elf_hash_table (info)->dynobj; |
| 2419 | BFD_ASSERT (dynobj != NULL); |
| 2420 | |
| 2421 | if (h->plt.offset != (bfd_vma) -1) |
| 2422 | { |
| 2423 | asection *splt; |
| 2424 | asection *srela; |
| 2425 | Elf_Internal_Rela rela; |
| 2426 | |
| 2427 | #ifdef DEBUG |
| 2428 | fprintf (stderr, ", plt_offset = %d", h->plt.offset); |
| 2429 | #endif |
| 2430 | |
| 2431 | /* This symbol has an entry in the procedure linkage table. Set |
| 2432 | it up. */ |
| 2433 | |
| 2434 | BFD_ASSERT (h->dynindx != -1); |
| 2435 | |
| 2436 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2437 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 2438 | BFD_ASSERT (splt != NULL && srela != NULL); |
| 2439 | |
| 2440 | /* We don't need to fill in the .plt. The ppc dynamic linker |
| 2441 | will fill it in. */ |
| 2442 | |
| 2443 | /* Fill in the entry in the .rela.plt section. */ |
| 2444 | rela.r_offset = (splt->output_section->vma |
| 2445 | + splt->output_offset |
| 2446 | + h->plt.offset); |
| 2447 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); |
| 2448 | rela.r_addend = 0; |
| 2449 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 2450 | ((Elf32_External_Rela *) srela->contents |
| 2451 | + ((h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / 8))); |
| 2452 | |
| 2453 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 2454 | { |
| 2455 | /* Mark the symbol as undefined, rather than as defined in |
| 2456 | the .plt section. Leave the value alone. */ |
| 2457 | sym->st_shndx = SHN_UNDEF; |
| 2458 | } |
| 2459 | } |
| 2460 | |
| 2461 | if (h->got.offset != (bfd_vma) -1) |
| 2462 | { |
| 2463 | asection *sgot; |
| 2464 | asection *srela; |
| 2465 | Elf_Internal_Rela rela; |
| 2466 | |
| 2467 | /* This symbol has an entry in the global offset table. Set it |
| 2468 | up. */ |
| 2469 | |
| 2470 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2471 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2472 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 2473 | |
| 2474 | rela.r_offset = (sgot->output_section->vma |
| 2475 | + sgot->output_offset |
| 2476 | + (h->got.offset &~ 1)); |
| 2477 | |
| 2478 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 2479 | locally, we just want to emit a RELATIVE reloc. The entry in |
| 2480 | the global offset table will already have been initialized in |
| 2481 | the relocate_section function. */ |
| 2482 | if (info->shared |
| 2483 | && (info->symbolic || h->dynindx == -1) |
| 2484 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 2485 | { |
| 2486 | rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 2487 | rela.r_addend = (h->root.u.def.value |
| 2488 | + h->root.u.def.section->output_section->vma |
| 2489 | + h->root.u.def.section->output_offset); |
| 2490 | } |
| 2491 | else |
| 2492 | { |
| 2493 | BFD_ASSERT((h->got.offset & 1) == 0); |
| 2494 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
| 2495 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_GLOB_DAT); |
| 2496 | rela.r_addend = 0; |
| 2497 | } |
| 2498 | |
| 2499 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 2500 | ((Elf32_External_Rela *) srela->contents |
| 2501 | + srela->reloc_count)); |
| 2502 | ++srela->reloc_count; |
| 2503 | } |
| 2504 | |
| 2505 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 2506 | { |
| 2507 | asection *s; |
| 2508 | Elf_Internal_Rela rela; |
| 2509 | |
| 2510 | /* This symbols needs a copy reloc. Set it up. */ |
| 2511 | |
| 2512 | #ifdef DEBUG |
| 2513 | fprintf (stderr, ", copy"); |
| 2514 | #endif |
| 2515 | |
| 2516 | BFD_ASSERT (h->dynindx != -1); |
| 2517 | |
| 2518 | if (h->size <= elf_gp_size (dynobj)) |
| 2519 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 2520 | ".rela.sbss"); |
| 2521 | else |
| 2522 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 2523 | ".rela.bss"); |
| 2524 | BFD_ASSERT (s != NULL); |
| 2525 | |
| 2526 | rela.r_offset = (h->root.u.def.value |
| 2527 | + h->root.u.def.section->output_section->vma |
| 2528 | + h->root.u.def.section->output_offset); |
| 2529 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); |
| 2530 | rela.r_addend = 0; |
| 2531 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 2532 | ((Elf32_External_Rela *) s->contents |
| 2533 | + s->reloc_count)); |
| 2534 | ++s->reloc_count; |
| 2535 | } |
| 2536 | |
| 2537 | #ifdef DEBUG |
| 2538 | fprintf (stderr, "\n"); |
| 2539 | #endif |
| 2540 | |
| 2541 | /* Mark some specially defined symbols as absolute. */ |
| 2542 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 2543 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| 2544 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| 2545 | sym->st_shndx = SHN_ABS; |
| 2546 | |
| 2547 | return true; |
| 2548 | } |
| 2549 | |
| 2550 | \f |
| 2551 | /* Finish up the dynamic sections. */ |
| 2552 | |
| 2553 | static boolean |
| 2554 | ppc_elf_finish_dynamic_sections (output_bfd, info) |
| 2555 | bfd *output_bfd; |
| 2556 | struct bfd_link_info *info; |
| 2557 | { |
| 2558 | asection *sdyn; |
| 2559 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 2560 | asection *sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2561 | |
| 2562 | #ifdef DEBUG |
| 2563 | fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); |
| 2564 | #endif |
| 2565 | |
| 2566 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 2567 | |
| 2568 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2569 | { |
| 2570 | asection *splt; |
| 2571 | Elf32_External_Dyn *dyncon, *dynconend; |
| 2572 | |
| 2573 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2574 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 2575 | |
| 2576 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 2577 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 2578 | for (; dyncon < dynconend; dyncon++) |
| 2579 | { |
| 2580 | Elf_Internal_Dyn dyn; |
| 2581 | const char *name; |
| 2582 | boolean size; |
| 2583 | |
| 2584 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 2585 | |
| 2586 | switch (dyn.d_tag) |
| 2587 | { |
| 2588 | case DT_PLTGOT: name = ".plt"; size = false; break; |
| 2589 | case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; |
| 2590 | case DT_JMPREL: name = ".rela.plt"; size = false; break; |
| 2591 | default: name = NULL; size = false; break; |
| 2592 | } |
| 2593 | |
| 2594 | if (name != NULL) |
| 2595 | { |
| 2596 | asection *s; |
| 2597 | |
| 2598 | s = bfd_get_section_by_name (output_bfd, name); |
| 2599 | if (s == NULL) |
| 2600 | dyn.d_un.d_val = 0; |
| 2601 | else |
| 2602 | { |
| 2603 | if (! size) |
| 2604 | dyn.d_un.d_ptr = s->vma; |
| 2605 | else |
| 2606 | { |
| 2607 | if (s->_cooked_size != 0) |
| 2608 | dyn.d_un.d_val = s->_cooked_size; |
| 2609 | else |
| 2610 | dyn.d_un.d_val = s->_raw_size; |
| 2611 | } |
| 2612 | } |
| 2613 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2614 | } |
| 2615 | } |
| 2616 | } |
| 2617 | |
| 2618 | /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can |
| 2619 | easily find the address of the _GLOBAL_OFFSET_TABLE_. */ |
| 2620 | if (sgot) |
| 2621 | { |
| 2622 | unsigned char *contents = sgot->contents; |
| 2623 | bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents); |
| 2624 | |
| 2625 | if (sdyn == NULL) |
| 2626 | bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4); |
| 2627 | else |
| 2628 | bfd_put_32 (output_bfd, |
| 2629 | sdyn->output_section->vma + sdyn->output_offset, |
| 2630 | contents+4); |
| 2631 | |
| 2632 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 2633 | } |
| 2634 | |
| 2635 | if (info->shared) |
| 2636 | { |
| 2637 | asection *sdynsym; |
| 2638 | asection *s; |
| 2639 | Elf_Internal_Sym sym; |
| 2640 | int maxdindx = 0; |
| 2641 | |
| 2642 | /* Set up the section symbols for the output sections. */ |
| 2643 | |
| 2644 | sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); |
| 2645 | BFD_ASSERT (sdynsym != NULL); |
| 2646 | |
| 2647 | sym.st_size = 0; |
| 2648 | sym.st_name = 0; |
| 2649 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); |
| 2650 | sym.st_other = 0; |
| 2651 | |
| 2652 | for (s = output_bfd->sections; s != NULL; s = s->next) |
| 2653 | { |
| 2654 | int indx, dindx; |
| 2655 | |
| 2656 | sym.st_value = s->vma; |
| 2657 | |
| 2658 | indx = elf_section_data (s)->this_idx; |
| 2659 | dindx = elf_section_data (s)->dynindx; |
| 2660 | if (dindx != -1) |
| 2661 | { |
| 2662 | BFD_ASSERT(indx > 0); |
| 2663 | BFD_ASSERT(dindx > 0); |
| 2664 | |
| 2665 | if (dindx > maxdindx) |
| 2666 | maxdindx = dindx; |
| 2667 | |
| 2668 | sym.st_shndx = indx; |
| 2669 | |
| 2670 | bfd_elf32_swap_symbol_out (output_bfd, &sym, |
| 2671 | (PTR) (((Elf32_External_Sym *) |
| 2672 | sdynsym->contents) |
| 2673 | + dindx)); |
| 2674 | } |
| 2675 | } |
| 2676 | |
| 2677 | /* Set the sh_info field of the output .dynsym section to the |
| 2678 | index of the first global symbol. */ |
| 2679 | elf_section_data (sdynsym->output_section)->this_hdr.sh_info = |
| 2680 | maxdindx + 1; |
| 2681 | } |
| 2682 | |
| 2683 | return true; |
| 2684 | } |
| 2685 | |
| 2686 | \f |
| 2687 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 2688 | to handle the relocations for a section. |
| 2689 | |
| 2690 | The relocs are always passed as Rela structures; if the section |
| 2691 | actually uses Rel structures, the r_addend field will always be |
| 2692 | zero. |
| 2693 | |
| 2694 | This function is responsible for adjust the section contents as |
| 2695 | necessary, and (if using Rela relocs and generating a |
| 2696 | relocateable output file) adjusting the reloc addend as |
| 2697 | necessary. |
| 2698 | |
| 2699 | This function does not have to worry about setting the reloc |
| 2700 | address or the reloc symbol index. |
| 2701 | |
| 2702 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 2703 | |
| 2704 | LOCAL_SECTIONS is an array giving the section in the input file |
| 2705 | corresponding to the st_shndx field of each local symbol. |
| 2706 | |
| 2707 | The global hash table entry for the global symbols can be found |
| 2708 | via elf_sym_hashes (input_bfd). |
| 2709 | |
| 2710 | When generating relocateable output, this function must handle |
| 2711 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 2712 | going to be the section symbol corresponding to the output |
| 2713 | section, which means that the addend must be adjusted |
| 2714 | accordingly. */ |
| 2715 | |
| 2716 | static boolean |
| 2717 | ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| 2718 | contents, relocs, local_syms, local_sections) |
| 2719 | bfd *output_bfd; |
| 2720 | struct bfd_link_info *info; |
| 2721 | bfd *input_bfd; |
| 2722 | asection *input_section; |
| 2723 | bfd_byte *contents; |
| 2724 | Elf_Internal_Rela *relocs; |
| 2725 | Elf_Internal_Sym *local_syms; |
| 2726 | asection **local_sections; |
| 2727 | { |
| 2728 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2729 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| 2730 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 2731 | elf_linker_section_t *sdata = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA) : NULL; |
| 2732 | elf_linker_section_t *sdata2 = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA2) : NULL; |
| 2733 | Elf_Internal_Rela *rel = relocs; |
| 2734 | Elf_Internal_Rela *relend = relocs + input_section->reloc_count; |
| 2735 | asection *sreloc = NULL; |
| 2736 | asection *splt; |
| 2737 | asection *sgot; |
| 2738 | bfd_vma *local_got_offsets; |
| 2739 | boolean ret = true; |
| 2740 | long insn; |
| 2741 | |
| 2742 | #ifdef DEBUG |
| 2743 | fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n", |
| 2744 | bfd_get_filename (input_bfd), |
| 2745 | bfd_section_name(input_bfd, input_section), |
| 2746 | (long)input_section->reloc_count, |
| 2747 | (info->relocateable) ? " (relocatable)" : ""); |
| 2748 | #endif |
| 2749 | |
| 2750 | if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */ |
| 2751 | ppc_elf_howto_init (); |
| 2752 | |
| 2753 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 2754 | |
| 2755 | splt = sgot = NULL; |
| 2756 | if (dynobj != NULL) |
| 2757 | { |
| 2758 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2759 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2760 | } |
| 2761 | |
| 2762 | for (; rel < relend; rel++) |
| 2763 | { |
| 2764 | enum elf_ppc_reloc_type r_type = (enum elf_ppc_reloc_type)ELF32_R_TYPE (rel->r_info); |
| 2765 | bfd_vma offset = rel->r_offset; |
| 2766 | bfd_vma addend = rel->r_addend; |
| 2767 | bfd_reloc_status_type r = bfd_reloc_other; |
| 2768 | Elf_Internal_Sym *sym = (Elf_Internal_Sym *)0; |
| 2769 | asection *sec = (asection *)0; |
| 2770 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *)0; |
| 2771 | const char *sym_name = (const char *)0; |
| 2772 | reloc_howto_type *howto; |
| 2773 | unsigned long r_symndx; |
| 2774 | bfd_vma relocation; |
| 2775 | |
| 2776 | /* Unknown relocation handling */ |
| 2777 | if ((unsigned)r_type >= (unsigned)R_PPC_max || !ppc_elf_howto_table[(int)r_type]) |
| 2778 | { |
| 2779 | (*_bfd_error_handler) (_("%s: unknown relocation type %d"), |
| 2780 | bfd_get_filename (input_bfd), |
| 2781 | (int)r_type); |
| 2782 | |
| 2783 | bfd_set_error (bfd_error_bad_value); |
| 2784 | ret = false; |
| 2785 | continue; |
| 2786 | } |
| 2787 | |
| 2788 | howto = ppc_elf_howto_table[(int)r_type]; |
| 2789 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2790 | |
| 2791 | if (info->relocateable) |
| 2792 | { |
| 2793 | /* This is a relocateable link. We don't have to change |
| 2794 | anything, unless the reloc is against a section symbol, |
| 2795 | in which case we have to adjust according to where the |
| 2796 | section symbol winds up in the output section. */ |
| 2797 | if (r_symndx < symtab_hdr->sh_info) |
| 2798 | { |
| 2799 | sym = local_syms + r_symndx; |
| 2800 | if ((unsigned)ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 2801 | { |
| 2802 | sec = local_sections[r_symndx]; |
| 2803 | addend = rel->r_addend += sec->output_offset + sym->st_value; |
| 2804 | } |
| 2805 | } |
| 2806 | |
| 2807 | #ifdef DEBUG |
| 2808 | fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n", |
| 2809 | howto->name, |
| 2810 | (int)r_type, |
| 2811 | r_symndx, |
| 2812 | (long)offset, |
| 2813 | (long)addend); |
| 2814 | #endif |
| 2815 | continue; |
| 2816 | } |
| 2817 | |
| 2818 | /* This is a final link. */ |
| 2819 | if (r_symndx < symtab_hdr->sh_info) |
| 2820 | { |
| 2821 | sym = local_syms + r_symndx; |
| 2822 | sec = local_sections[r_symndx]; |
| 2823 | sym_name = "<local symbol>"; |
| 2824 | |
| 2825 | relocation = (sec->output_section->vma |
| 2826 | + sec->output_offset |
| 2827 | + sym->st_value); |
| 2828 | } |
| 2829 | else |
| 2830 | { |
| 2831 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2832 | while (h->root.type == bfd_link_hash_indirect |
| 2833 | || h->root.type == bfd_link_hash_warning) |
| 2834 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2835 | sym_name = h->root.root.string; |
| 2836 | if (h->root.type == bfd_link_hash_defined |
| 2837 | || h->root.type == bfd_link_hash_defweak) |
| 2838 | { |
| 2839 | sec = h->root.u.def.section; |
| 2840 | if ((r_type == R_PPC_PLT32 |
| 2841 | && h->plt.offset != (bfd_vma) -1) |
| 2842 | || (r_type == R_PPC_LOCAL24PC |
| 2843 | && sec->output_section == NULL) |
| 2844 | || ((r_type == R_PPC_GOT16 |
| 2845 | || r_type == R_PPC_GOT16_LO |
| 2846 | || r_type == R_PPC_GOT16_HI |
| 2847 | || r_type == R_PPC_GOT16_HA) |
| 2848 | && elf_hash_table (info)->dynamic_sections_created |
| 2849 | && (! info->shared |
| 2850 | || (! info->symbolic && h->dynindx != -1) |
| 2851 | || (h->elf_link_hash_flags |
| 2852 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 2853 | || (info->shared |
| 2854 | && ((! info->symbolic && h->dynindx != -1) |
| 2855 | || (h->elf_link_hash_flags |
| 2856 | & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 2857 | && (input_section->flags & SEC_ALLOC) != 0 |
| 2858 | && (r_type == R_PPC_ADDR32 |
| 2859 | || r_type == R_PPC_ADDR24 |
| 2860 | || r_type == R_PPC_ADDR16 |
| 2861 | || r_type == R_PPC_ADDR16_LO |
| 2862 | || r_type == R_PPC_ADDR16_HI |
| 2863 | || r_type == R_PPC_ADDR16_HA |
| 2864 | || r_type == R_PPC_ADDR14 |
| 2865 | || r_type == R_PPC_ADDR14_BRTAKEN |
| 2866 | || r_type == R_PPC_ADDR14_BRNTAKEN |
| 2867 | || r_type == R_PPC_PLTREL24 |
| 2868 | || r_type == R_PPC_COPY |
| 2869 | || r_type == R_PPC_GLOB_DAT |
| 2870 | || r_type == R_PPC_JMP_SLOT |
| 2871 | || r_type == R_PPC_UADDR32 |
| 2872 | || r_type == R_PPC_UADDR16 |
| 2873 | || r_type == R_PPC_SDAREL16 |
| 2874 | || r_type == R_PPC_EMB_NADDR32 |
| 2875 | || r_type == R_PPC_EMB_NADDR16 |
| 2876 | || r_type == R_PPC_EMB_NADDR16_LO |
| 2877 | || r_type == R_PPC_EMB_NADDR16_HI |
| 2878 | || r_type == R_PPC_EMB_NADDR16_HA |
| 2879 | || r_type == R_PPC_EMB_SDAI16 |
| 2880 | || r_type == R_PPC_EMB_SDA2I16 |
| 2881 | || r_type == R_PPC_EMB_SDA2REL |
| 2882 | || r_type == R_PPC_EMB_SDA21 |
| 2883 | || r_type == R_PPC_EMB_MRKREF |
| 2884 | || r_type == R_PPC_EMB_BIT_FLD |
| 2885 | || r_type == R_PPC_EMB_RELSDA |
| 2886 | || ((r_type == R_PPC_REL24 |
| 2887 | || r_type == R_PPC_REL32 |
| 2888 | || r_type == R_PPC_REL14 |
| 2889 | || r_type == R_PPC_REL14_BRTAKEN |
| 2890 | || r_type == R_PPC_REL14_BRNTAKEN |
| 2891 | || r_type == R_PPC_RELATIVE) |
| 2892 | && strcmp (h->root.root.string, |
| 2893 | "_GLOBAL_OFFSET_TABLE_") != 0)))) |
| 2894 | { |
| 2895 | /* In these cases, we don't need the relocation |
| 2896 | value. We check specially because in some |
| 2897 | obscure cases sec->output_section will be NULL. */ |
| 2898 | relocation = 0; |
| 2899 | } |
| 2900 | else |
| 2901 | relocation = (h->root.u.def.value |
| 2902 | + sec->output_section->vma |
| 2903 | + sec->output_offset); |
| 2904 | } |
| 2905 | else if (h->root.type == bfd_link_hash_undefweak) |
| 2906 | relocation = 0; |
| 2907 | else if (info->shared) |
| 2908 | relocation = 0; |
| 2909 | else |
| 2910 | { |
| 2911 | (*info->callbacks->undefined_symbol)(info, |
| 2912 | h->root.root.string, |
| 2913 | input_bfd, |
| 2914 | input_section, |
| 2915 | rel->r_offset); |
| 2916 | ret = false; |
| 2917 | continue; |
| 2918 | } |
| 2919 | } |
| 2920 | |
| 2921 | switch ((int)r_type) |
| 2922 | { |
| 2923 | default: |
| 2924 | (*_bfd_error_handler) (_("%s: unknown relocation type %d for symbol %s"), |
| 2925 | bfd_get_filename (input_bfd), |
| 2926 | (int)r_type, sym_name); |
| 2927 | |
| 2928 | bfd_set_error (bfd_error_bad_value); |
| 2929 | ret = false; |
| 2930 | continue; |
| 2931 | |
| 2932 | /* Relocations that need no special processing. */ |
| 2933 | case (int)R_PPC_LOCAL24PC: |
| 2934 | /* It makes no sense to point a local relocation |
| 2935 | at a symbol not in this object. */ |
| 2936 | if (h != NULL |
| 2937 | && (h->root.type == bfd_link_hash_defined |
| 2938 | || h->root.type == bfd_link_hash_defweak) |
| 2939 | && sec->output_section == NULL) |
| 2940 | { |
| 2941 | (*info->callbacks->undefined_symbol) (info, |
| 2942 | h->root.root.string, |
| 2943 | input_bfd, |
| 2944 | input_section, |
| 2945 | rel->r_offset); |
| 2946 | ret = false; |
| 2947 | continue; |
| 2948 | } |
| 2949 | break; |
| 2950 | |
| 2951 | /* Relocations that may need to be propagated if this is a shared |
| 2952 | object. */ |
| 2953 | case (int)R_PPC_REL24: |
| 2954 | case (int)R_PPC_REL32: |
| 2955 | case (int)R_PPC_REL14: |
| 2956 | /* If these relocations are not to a named symbol, they can be |
| 2957 | handled right here, no need to bother the dynamic linker. */ |
| 2958 | if (h == NULL |
| 2959 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2960 | break; |
| 2961 | /* fall through */ |
| 2962 | |
| 2963 | /* Relocations that always need to be propagated if this is a shared |
| 2964 | object. */ |
| 2965 | case (int)R_PPC_NONE: |
| 2966 | case (int)R_PPC_ADDR32: |
| 2967 | case (int)R_PPC_ADDR24: |
| 2968 | case (int)R_PPC_ADDR16: |
| 2969 | case (int)R_PPC_ADDR16_LO: |
| 2970 | case (int)R_PPC_ADDR16_HI: |
| 2971 | case (int)R_PPC_ADDR16_HA: |
| 2972 | case (int)R_PPC_ADDR14: |
| 2973 | case (int)R_PPC_UADDR32: |
| 2974 | case (int)R_PPC_UADDR16: |
| 2975 | if (info->shared) |
| 2976 | { |
| 2977 | Elf_Internal_Rela outrel; |
| 2978 | boolean skip; |
| 2979 | |
| 2980 | #ifdef DEBUG |
| 2981 | fprintf (stderr, "ppc_elf_relocate_section need to create relocation for %s\n", |
| 2982 | (h && h->root.root.string) ? h->root.root.string : "<unknown>"); |
| 2983 | #endif |
| 2984 | |
| 2985 | /* When generating a shared object, these relocations |
| 2986 | are copied into the output file to be resolved at run |
| 2987 | time. */ |
| 2988 | |
| 2989 | if (sreloc == NULL) |
| 2990 | { |
| 2991 | const char *name; |
| 2992 | |
| 2993 | name = (bfd_elf_string_from_elf_section |
| 2994 | (input_bfd, |
| 2995 | elf_elfheader (input_bfd)->e_shstrndx, |
| 2996 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 2997 | if (name == NULL) |
| 2998 | return false; |
| 2999 | |
| 3000 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 3001 | && strcmp (bfd_get_section_name (input_bfd, |
| 3002 | input_section), |
| 3003 | name + 5) == 0); |
| 3004 | |
| 3005 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 3006 | BFD_ASSERT (sreloc != NULL); |
| 3007 | } |
| 3008 | |
| 3009 | skip = false; |
| 3010 | |
| 3011 | if (elf_section_data (input_section)->stab_info == NULL) |
| 3012 | outrel.r_offset = rel->r_offset; |
| 3013 | else |
| 3014 | { |
| 3015 | bfd_vma off; |
| 3016 | |
| 3017 | off = (_bfd_stab_section_offset |
| 3018 | (output_bfd, &elf_hash_table (info)->stab_info, |
| 3019 | input_section, |
| 3020 | &elf_section_data (input_section)->stab_info, |
| 3021 | rel->r_offset)); |
| 3022 | if (off == (bfd_vma) -1) |
| 3023 | skip = true; |
| 3024 | outrel.r_offset = off; |
| 3025 | } |
| 3026 | |
| 3027 | outrel.r_offset += (input_section->output_section->vma |
| 3028 | + input_section->output_offset); |
| 3029 | |
| 3030 | if (skip) |
| 3031 | memset (&outrel, 0, sizeof outrel); |
| 3032 | /* h->dynindx may be -1 if this symbol was marked to |
| 3033 | become local. */ |
| 3034 | else if (h != NULL |
| 3035 | && ((! info->symbolic && h->dynindx != -1) |
| 3036 | || (h->elf_link_hash_flags |
| 3037 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 3038 | { |
| 3039 | BFD_ASSERT (h->dynindx != -1); |
| 3040 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 3041 | outrel.r_addend = rel->r_addend; |
| 3042 | } |
| 3043 | else |
| 3044 | { |
| 3045 | if (r_type == R_PPC_ADDR32) |
| 3046 | { |
| 3047 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 3048 | outrel.r_addend = relocation + rel->r_addend; |
| 3049 | } |
| 3050 | else |
| 3051 | { |
| 3052 | long indx; |
| 3053 | |
| 3054 | if (h == NULL) |
| 3055 | sec = local_sections[r_symndx]; |
| 3056 | else |
| 3057 | { |
| 3058 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
| 3059 | || (h->root.type |
| 3060 | == bfd_link_hash_defweak)); |
| 3061 | sec = h->root.u.def.section; |
| 3062 | } |
| 3063 | if (sec != NULL && bfd_is_abs_section (sec)) |
| 3064 | indx = 0; |
| 3065 | else if (sec == NULL || sec->owner == NULL) |
| 3066 | { |
| 3067 | bfd_set_error (bfd_error_bad_value); |
| 3068 | return false; |
| 3069 | } |
| 3070 | else |
| 3071 | { |
| 3072 | asection *osec; |
| 3073 | |
| 3074 | osec = sec->output_section; |
| 3075 | indx = elf_section_data (osec)->dynindx; |
| 3076 | BFD_ASSERT(indx > 0); |
| 3077 | #ifdef DEBUG |
| 3078 | if (indx <= 0) |
| 3079 | { |
| 3080 | printf("indx=%d section=%s flags=%08x name=%s\n", |
| 3081 | indx, osec->name, osec->flags, |
| 3082 | h->root.root.string); |
| 3083 | } |
| 3084 | #endif |
| 3085 | } |
| 3086 | |
| 3087 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 3088 | outrel.r_addend = relocation + rel->r_addend; |
| 3089 | } |
| 3090 | } |
| 3091 | |
| 3092 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 3093 | (((Elf32_External_Rela *) |
| 3094 | sreloc->contents) |
| 3095 | + sreloc->reloc_count)); |
| 3096 | ++sreloc->reloc_count; |
| 3097 | |
| 3098 | /* This reloc will be computed at runtime, so there's no |
| 3099 | need to do anything now, unless this is a RELATIVE |
| 3100 | reloc in an unallocated section. */ |
| 3101 | if (skip |
| 3102 | || (input_section->flags & SEC_ALLOC) != 0 |
| 3103 | || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE) |
| 3104 | continue; |
| 3105 | } |
| 3106 | |
| 3107 | /* Arithmetic adjust relocations that aren't going into a |
| 3108 | shared object. */ |
| 3109 | if (r_type == R_PPC_ADDR16_HA |
| 3110 | /* It's just possible that this symbol is a weak symbol |
| 3111 | that's not actually defined anywhere. In that case, |
| 3112 | 'sec' would be NULL, and we should leave the symbol |
| 3113 | alone (it will be set to zero elsewhere in the link). */ |
| 3114 | && sec != NULL) |
| 3115 | { |
| 3116 | addend += ((relocation + addend) & 0x8000) << 1; |
| 3117 | } |
| 3118 | break; |
| 3119 | |
| 3120 | /* branch taken prediction relocations */ |
| 3121 | case (int)R_PPC_ADDR14_BRTAKEN: |
| 3122 | case (int)R_PPC_REL14_BRTAKEN: |
| 3123 | insn = bfd_get_32 (output_bfd, contents + offset); |
| 3124 | if ((relocation - offset) & 0x8000) |
| 3125 | insn &= ~BRANCH_PREDICT_BIT; |
| 3126 | else |
| 3127 | insn |= BRANCH_PREDICT_BIT; |
| 3128 | bfd_put_32 (output_bfd, insn, contents + offset); |
| 3129 | break; |
| 3130 | |
| 3131 | /* branch not taken predicition relocations */ |
| 3132 | case (int)R_PPC_ADDR14_BRNTAKEN: |
| 3133 | case (int)R_PPC_REL14_BRNTAKEN: |
| 3134 | insn = bfd_get_32 (output_bfd, contents + offset); |
| 3135 | if ((relocation - offset) & 0x8000) |
| 3136 | insn |= BRANCH_PREDICT_BIT; |
| 3137 | else |
| 3138 | insn &= ~BRANCH_PREDICT_BIT; |
| 3139 | bfd_put_32 (output_bfd, insn, contents + offset); |
| 3140 | break; |
| 3141 | |
| 3142 | /* GOT16 relocations */ |
| 3143 | case (int)R_PPC_GOT16: |
| 3144 | case (int)R_PPC_GOT16_LO: |
| 3145 | case (int)R_PPC_GOT16_HI: |
| 3146 | case (int)R_PPC_GOT16_HA: |
| 3147 | /* Relocation is to the entry for this symbol in the global |
| 3148 | offset table. */ |
| 3149 | BFD_ASSERT (sgot != NULL); |
| 3150 | |
| 3151 | if (h != NULL) |
| 3152 | { |
| 3153 | bfd_vma off; |
| 3154 | |
| 3155 | off = h->got.offset; |
| 3156 | BFD_ASSERT (off != (bfd_vma) -1); |
| 3157 | |
| 3158 | if (! elf_hash_table (info)->dynamic_sections_created |
| 3159 | || (info->shared |
| 3160 | && (info->symbolic || h->dynindx == -1) |
| 3161 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
| 3162 | { |
| 3163 | /* This is actually a static link, or it is a |
| 3164 | -Bsymbolic link and the symbol is defined |
| 3165 | locally. We must initialize this entry in the |
| 3166 | global offset table. Since the offset must |
| 3167 | always be a multiple of 4, we use the least |
| 3168 | significant bit to record whether we have |
| 3169 | initialized it already. |
| 3170 | |
| 3171 | When doing a dynamic link, we create a .rela.got |
| 3172 | relocation entry to initialize the value. This |
| 3173 | is done in the finish_dynamic_symbol routine. */ |
| 3174 | if ((off & 1) != 0) |
| 3175 | off &= ~1; |
| 3176 | else |
| 3177 | { |
| 3178 | bfd_put_32 (output_bfd, relocation, |
| 3179 | sgot->contents + off); |
| 3180 | h->got.offset |= 1; |
| 3181 | } |
| 3182 | } |
| 3183 | |
| 3184 | relocation = sgot->output_offset + off - 4; |
| 3185 | } |
| 3186 | else |
| 3187 | { |
| 3188 | bfd_vma off; |
| 3189 | |
| 3190 | BFD_ASSERT (local_got_offsets != NULL |
| 3191 | && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 3192 | |
| 3193 | off = local_got_offsets[r_symndx]; |
| 3194 | |
| 3195 | /* The offset must always be a multiple of 4. We use |
| 3196 | the least significant bit to record whether we have |
| 3197 | already processed this entry. */ |
| 3198 | if ((off & 1) != 0) |
| 3199 | off &= ~1; |
| 3200 | else |
| 3201 | { |
| 3202 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 3203 | |
| 3204 | if (info->shared) |
| 3205 | { |
| 3206 | asection *srelgot; |
| 3207 | Elf_Internal_Rela outrel; |
| 3208 | |
| 3209 | /* We need to generate a R_PPC_RELATIVE reloc |
| 3210 | for the dynamic linker. */ |
| 3211 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 3212 | BFD_ASSERT (srelgot != NULL); |
| 3213 | |
| 3214 | outrel.r_offset = (sgot->output_section->vma |
| 3215 | + sgot->output_offset |
| 3216 | + off); |
| 3217 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 3218 | outrel.r_addend = relocation; |
| 3219 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 3220 | (((Elf32_External_Rela *) |
| 3221 | srelgot->contents) |
| 3222 | + srelgot->reloc_count)); |
| 3223 | ++srelgot->reloc_count; |
| 3224 | } |
| 3225 | |
| 3226 | local_got_offsets[r_symndx] |= 1; |
| 3227 | } |
| 3228 | |
| 3229 | relocation = sgot->output_offset + off - 4; |
| 3230 | } |
| 3231 | break; |
| 3232 | |
| 3233 | /* Indirect .sdata relocation */ |
| 3234 | case (int)R_PPC_EMB_SDAI16: |
| 3235 | BFD_ASSERT (sdata != NULL); |
| 3236 | relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info, |
| 3237 | sdata, h, relocation, rel, |
| 3238 | R_PPC_RELATIVE); |
| 3239 | break; |
| 3240 | |
| 3241 | /* Indirect .sdata2 relocation */ |
| 3242 | case (int)R_PPC_EMB_SDA2I16: |
| 3243 | BFD_ASSERT (sdata2 != NULL); |
| 3244 | relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info, |
| 3245 | sdata2, h, relocation, rel, |
| 3246 | R_PPC_RELATIVE); |
| 3247 | break; |
| 3248 | |
| 3249 | /* Handle the TOC16 reloc. We want to use the offset within the .got |
| 3250 | section, not the actual VMA. This is appropriate when generating |
| 3251 | an embedded ELF object, for which the .got section acts like the |
| 3252 | AIX .toc section. */ |
| 3253 | case (int)R_PPC_TOC16: /* phony GOT16 relocations */ |
| 3254 | BFD_ASSERT (sec != (asection *)0); |
| 3255 | BFD_ASSERT (bfd_is_und_section (sec) |
| 3256 | || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0 |
| 3257 | || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0) |
| 3258 | |
| 3259 | addend -= sec->output_section->vma + sec->output_offset + 0x8000; |
| 3260 | break; |
| 3261 | |
| 3262 | case (int)R_PPC_PLTREL24: |
| 3263 | /* Relocation is to the entry for this symbol in the |
| 3264 | procedure linkage table. */ |
| 3265 | BFD_ASSERT (h != NULL); |
| 3266 | |
| 3267 | if (h->plt.offset == (bfd_vma) -1 |
| 3268 | || splt == NULL) |
| 3269 | { |
| 3270 | /* We didn't make a PLT entry for this symbol. This |
| 3271 | happens when statically linking PIC code, or when |
| 3272 | using -Bsymbolic. */ |
| 3273 | break; |
| 3274 | } |
| 3275 | |
| 3276 | relocation = (splt->output_section->vma |
| 3277 | + splt->output_offset |
| 3278 | + h->plt.offset); |
| 3279 | break; |
| 3280 | |
| 3281 | /* relocate against _SDA_BASE_ */ |
| 3282 | case (int)R_PPC_SDAREL16: |
| 3283 | { |
| 3284 | const char *name; |
| 3285 | |
| 3286 | BFD_ASSERT (sec != (asection *)0); |
| 3287 | name = bfd_get_section_name (abfd, sec->output_section); |
| 3288 | if (strcmp (name, ".sdata") != 0 |
| 3289 | && strcmp (name, ".sbss") != 0) |
| 3290 | { |
| 3291 | (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"), |
| 3292 | bfd_get_filename (input_bfd), |
| 3293 | sym_name, |
| 3294 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 3295 | name); |
| 3296 | } |
| 3297 | addend -= (sdata->sym_hash->root.u.def.value |
| 3298 | + sdata->sym_hash->root.u.def.section->output_section->vma |
| 3299 | + sdata->sym_hash->root.u.def.section->output_offset); |
| 3300 | } |
| 3301 | break; |
| 3302 | |
| 3303 | |
| 3304 | /* relocate against _SDA2_BASE_ */ |
| 3305 | case (int)R_PPC_EMB_SDA2REL: |
| 3306 | { |
| 3307 | const char *name; |
| 3308 | |
| 3309 | BFD_ASSERT (sec != (asection *)0); |
| 3310 | name = bfd_get_section_name (abfd, sec->output_section); |
| 3311 | if (strcmp (name, ".sdata2") != 0 && strcmp (name, ".sbss2") != 0) |
| 3312 | { |
| 3313 | (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"), |
| 3314 | bfd_get_filename (input_bfd), |
| 3315 | sym_name, |
| 3316 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 3317 | name); |
| 3318 | |
| 3319 | bfd_set_error (bfd_error_bad_value); |
| 3320 | ret = false; |
| 3321 | continue; |
| 3322 | } |
| 3323 | addend -= (sdata2->sym_hash->root.u.def.value |
| 3324 | + sdata2->sym_hash->root.u.def.section->output_section->vma |
| 3325 | + sdata2->sym_hash->root.u.def.section->output_offset); |
| 3326 | } |
| 3327 | break; |
| 3328 | |
| 3329 | |
| 3330 | /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */ |
| 3331 | case (int)R_PPC_EMB_SDA21: |
| 3332 | case (int)R_PPC_EMB_RELSDA: |
| 3333 | { |
| 3334 | const char *name; |
| 3335 | int reg; |
| 3336 | |
| 3337 | BFD_ASSERT (sec != (asection *)0); |
| 3338 | name = bfd_get_section_name (abfd, sec->output_section); |
| 3339 | if (strcmp (name, ".sdata") == 0 || strcmp (name, ".sbss") == 0) |
| 3340 | { |
| 3341 | reg = 13; |
| 3342 | addend -= (sdata->sym_hash->root.u.def.value |
| 3343 | + sdata->sym_hash->root.u.def.section->output_section->vma |
| 3344 | + sdata->sym_hash->root.u.def.section->output_offset); |
| 3345 | } |
| 3346 | |
| 3347 | else if (strcmp (name, ".sdata2") == 0 || strcmp (name, ".sbss2") == 0) |
| 3348 | { |
| 3349 | reg = 2; |
| 3350 | addend -= (sdata2->sym_hash->root.u.def.value |
| 3351 | + sdata2->sym_hash->root.u.def.section->output_section->vma |
| 3352 | + sdata2->sym_hash->root.u.def.section->output_offset); |
| 3353 | } |
| 3354 | |
| 3355 | else if (strcmp (name, ".PPC.EMB.sdata0") == 0 || strcmp (name, ".PPC.EMB.sbss0") == 0) |
| 3356 | { |
| 3357 | reg = 0; |
| 3358 | } |
| 3359 | |
| 3360 | else |
| 3361 | { |
| 3362 | (*_bfd_error_handler) (_("%s: The target (%s) of a %s relocation is in the wrong output section (%s)"), |
| 3363 | bfd_get_filename (input_bfd), |
| 3364 | sym_name, |
| 3365 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 3366 | name); |
| 3367 | |
| 3368 | bfd_set_error (bfd_error_bad_value); |
| 3369 | ret = false; |
| 3370 | continue; |
| 3371 | } |
| 3372 | |
| 3373 | if (r_type == R_PPC_EMB_SDA21) |
| 3374 | { /* fill in register field */ |
| 3375 | insn = bfd_get_32 (output_bfd, contents + offset); |
| 3376 | insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); |
| 3377 | bfd_put_32 (output_bfd, insn, contents + offset); |
| 3378 | } |
| 3379 | } |
| 3380 | break; |
| 3381 | |
| 3382 | /* Relocate against the beginning of the section */ |
| 3383 | case (int)R_PPC_SECTOFF: |
| 3384 | case (int)R_PPC_SECTOFF_LO: |
| 3385 | case (int)R_PPC_SECTOFF_HI: |
| 3386 | BFD_ASSERT (sec != (asection *)0); |
| 3387 | addend -= sec->output_section->vma; |
| 3388 | break; |
| 3389 | |
| 3390 | case (int)R_PPC_SECTOFF_HA: |
| 3391 | BFD_ASSERT (sec != (asection *)0); |
| 3392 | addend -= sec->output_section->vma; |
| 3393 | addend += ((relocation + addend) & 0x8000) << 1; |
| 3394 | break; |
| 3395 | |
| 3396 | /* Negative relocations */ |
| 3397 | case (int)R_PPC_EMB_NADDR32: |
| 3398 | case (int)R_PPC_EMB_NADDR16: |
| 3399 | case (int)R_PPC_EMB_NADDR16_LO: |
| 3400 | case (int)R_PPC_EMB_NADDR16_HI: |
| 3401 | addend -= 2*relocation; |
| 3402 | break; |
| 3403 | |
| 3404 | case (int)R_PPC_EMB_NADDR16_HA: |
| 3405 | addend -= 2*relocation; |
| 3406 | addend += ((relocation + addend) & 0x8000) << 1; |
| 3407 | break; |
| 3408 | |
| 3409 | /* NOP relocation that prevents garbage collecting linkers from omitting a |
| 3410 | reference. */ |
| 3411 | case (int)R_PPC_EMB_MRKREF: |
| 3412 | continue; |
| 3413 | |
| 3414 | case (int)R_PPC_COPY: |
| 3415 | case (int)R_PPC_GLOB_DAT: |
| 3416 | case (int)R_PPC_JMP_SLOT: |
| 3417 | case (int)R_PPC_RELATIVE: |
| 3418 | case (int)R_PPC_PLT32: |
| 3419 | case (int)R_PPC_PLTREL32: |
| 3420 | case (int)R_PPC_PLT16_LO: |
| 3421 | case (int)R_PPC_PLT16_HI: |
| 3422 | case (int)R_PPC_PLT16_HA: |
| 3423 | case (int)R_PPC_EMB_RELSEC16: |
| 3424 | case (int)R_PPC_EMB_RELST_LO: |
| 3425 | case (int)R_PPC_EMB_RELST_HI: |
| 3426 | case (int)R_PPC_EMB_RELST_HA: |
| 3427 | case (int)R_PPC_EMB_BIT_FLD: |
| 3428 | (*_bfd_error_handler) (_("%s: Relocation %s is not yet supported for symbol %s."), |
| 3429 | bfd_get_filename (input_bfd), |
| 3430 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 3431 | sym_name); |
| 3432 | |
| 3433 | bfd_set_error (bfd_error_invalid_operation); |
| 3434 | ret = false; |
| 3435 | continue; |
| 3436 | |
| 3437 | case (int)R_PPC_GNU_VTINHERIT: |
| 3438 | case (int)R_PPC_GNU_VTENTRY: |
| 3439 | /* These are no-ops in the end. */ |
| 3440 | continue; |
| 3441 | } |
| 3442 | |
| 3443 | |
| 3444 | #ifdef DEBUG |
| 3445 | fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n", |
| 3446 | howto->name, |
| 3447 | (int)r_type, |
| 3448 | sym_name, |
| 3449 | r_symndx, |
| 3450 | (long)offset, |
| 3451 | (long)addend); |
| 3452 | #endif |
| 3453 | |
| 3454 | r = _bfd_final_link_relocate (howto, |
| 3455 | input_bfd, |
| 3456 | input_section, |
| 3457 | contents, |
| 3458 | offset, |
| 3459 | relocation, |
| 3460 | addend); |
| 3461 | |
| 3462 | if (r != bfd_reloc_ok) |
| 3463 | { |
| 3464 | ret = false; |
| 3465 | switch (r) |
| 3466 | { |
| 3467 | default: |
| 3468 | break; |
| 3469 | |
| 3470 | case bfd_reloc_overflow: |
| 3471 | { |
| 3472 | const char *name; |
| 3473 | |
| 3474 | if (h != NULL) |
| 3475 | name = h->root.root.string; |
| 3476 | else |
| 3477 | { |
| 3478 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 3479 | symtab_hdr->sh_link, |
| 3480 | sym->st_name); |
| 3481 | if (name == NULL) |
| 3482 | break; |
| 3483 | |
| 3484 | if (*name == '\0') |
| 3485 | name = bfd_section_name (input_bfd, sec); |
| 3486 | } |
| 3487 | |
| 3488 | (*info->callbacks->reloc_overflow)(info, |
| 3489 | name, |
| 3490 | howto->name, |
| 3491 | (bfd_vma) 0, |
| 3492 | input_bfd, |
| 3493 | input_section, |
| 3494 | offset); |
| 3495 | } |
| 3496 | break; |
| 3497 | |
| 3498 | } |
| 3499 | } |
| 3500 | } |
| 3501 | |
| 3502 | |
| 3503 | #ifdef DEBUG |
| 3504 | fprintf (stderr, "\n"); |
| 3505 | #endif |
| 3506 | |
| 3507 | return ret; |
| 3508 | } |
| 3509 | |
| 3510 | \f |
| 3511 | #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec |
| 3512 | #define TARGET_LITTLE_NAME "elf32-powerpcle" |
| 3513 | #define TARGET_BIG_SYM bfd_elf32_powerpc_vec |
| 3514 | #define TARGET_BIG_NAME "elf32-powerpc" |
| 3515 | #define ELF_ARCH bfd_arch_powerpc |
| 3516 | #define ELF_MACHINE_CODE EM_PPC |
| 3517 | #define ELF_MAXPAGESIZE 0x10000 |
| 3518 | #define elf_info_to_howto ppc_elf_info_to_howto |
| 3519 | |
| 3520 | #ifdef EM_CYGNUS_POWERPC |
| 3521 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC |
| 3522 | #endif |
| 3523 | |
| 3524 | #ifdef EM_PPC_OLD |
| 3525 | #define ELF_MACHINE_ALT2 EM_PPC_OLD |
| 3526 | #endif |
| 3527 | |
| 3528 | #define elf_backend_plt_not_loaded 1 |
| 3529 | #define elf_backend_got_symbol_offset 4 |
| 3530 | #define elf_backend_can_gc_sections 1 |
| 3531 | #define elf_backend_got_header_size 12 |
| 3532 | #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE |
| 3533 | |
| 3534 | #define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data |
| 3535 | #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data |
| 3536 | #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags |
| 3537 | #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup |
| 3538 | #define bfd_elf32_bfd_final_link _bfd_elf32_gc_common_final_link |
| 3539 | |
| 3540 | #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook |
| 3541 | #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook |
| 3542 | #define elf_backend_section_from_shdr ppc_elf_section_from_shdr |
| 3543 | #define elf_backend_relocate_section ppc_elf_relocate_section |
| 3544 | #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections |
| 3545 | #define elf_backend_check_relocs ppc_elf_check_relocs |
| 3546 | #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol |
| 3547 | #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook |
| 3548 | #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections |
| 3549 | #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol |
| 3550 | #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections |
| 3551 | #define elf_backend_fake_sections ppc_elf_fake_sections |
| 3552 | #define elf_backend_additional_program_headers ppc_elf_additional_program_headers |
| 3553 | #define elf_backend_modify_segment_map ppc_elf_modify_segment_map |
| 3554 | |
| 3555 | #include "elf32-target.h" |