| 1 | /* PowerPC-specific support for 32-bit ELF |
| 2 | Copyright 1994, 1995, 1996 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 | /* PowerPC relocations defined by the ABIs */ |
| 36 | enum ppc_reloc_type |
| 37 | { |
| 38 | R_PPC_NONE = 0, |
| 39 | R_PPC_ADDR32 = 1, |
| 40 | R_PPC_ADDR24 = 2, |
| 41 | R_PPC_ADDR16 = 3, |
| 42 | R_PPC_ADDR16_LO = 4, |
| 43 | R_PPC_ADDR16_HI = 5, |
| 44 | R_PPC_ADDR16_HA = 6, |
| 45 | R_PPC_ADDR14 = 7, |
| 46 | R_PPC_ADDR14_BRTAKEN = 8, |
| 47 | R_PPC_ADDR14_BRNTAKEN = 9, |
| 48 | R_PPC_REL24 = 10, |
| 49 | R_PPC_REL14 = 11, |
| 50 | R_PPC_REL14_BRTAKEN = 12, |
| 51 | R_PPC_REL14_BRNTAKEN = 13, |
| 52 | R_PPC_GOT16 = 14, |
| 53 | R_PPC_GOT16_LO = 15, |
| 54 | R_PPC_GOT16_HI = 16, |
| 55 | R_PPC_GOT16_HA = 17, |
| 56 | R_PPC_PLTREL24 = 18, |
| 57 | R_PPC_COPY = 19, |
| 58 | R_PPC_GLOB_DAT = 20, |
| 59 | R_PPC_JMP_SLOT = 21, |
| 60 | R_PPC_RELATIVE = 22, |
| 61 | R_PPC_LOCAL24PC = 23, |
| 62 | R_PPC_UADDR32 = 24, |
| 63 | R_PPC_UADDR16 = 25, |
| 64 | R_PPC_REL32 = 26, |
| 65 | R_PPC_PLT32 = 27, |
| 66 | R_PPC_PLTREL32 = 28, |
| 67 | R_PPC_PLT16_LO = 29, |
| 68 | R_PPC_PLT16_HI = 30, |
| 69 | R_PPC_PLT16_HA = 31, |
| 70 | R_PPC_SDAREL16 = 32, |
| 71 | R_PPC_SECTOFF = 33, |
| 72 | R_PPC_SECTOFF_LO = 34, |
| 73 | R_PPC_SECTOFF_HI = 35, |
| 74 | R_PPC_SECTOFF_HA = 36, |
| 75 | |
| 76 | /* The remaining relocs are from the Embedded ELF ABI, and are not |
| 77 | in the SVR4 ELF ABI. */ |
| 78 | R_PPC_EMB_NADDR32 = 101, |
| 79 | R_PPC_EMB_NADDR16 = 102, |
| 80 | R_PPC_EMB_NADDR16_LO = 103, |
| 81 | R_PPC_EMB_NADDR16_HI = 104, |
| 82 | R_PPC_EMB_NADDR16_HA = 105, |
| 83 | R_PPC_EMB_SDAI16 = 106, |
| 84 | R_PPC_EMB_SDA2I16 = 107, |
| 85 | R_PPC_EMB_SDA2REL = 108, |
| 86 | R_PPC_EMB_SDA21 = 109, |
| 87 | R_PPC_EMB_MRKREF = 110, |
| 88 | R_PPC_EMB_RELSEC16 = 111, |
| 89 | R_PPC_EMB_RELST_LO = 112, |
| 90 | R_PPC_EMB_RELST_HI = 113, |
| 91 | R_PPC_EMB_RELST_HA = 114, |
| 92 | R_PPC_EMB_BIT_FLD = 115, |
| 93 | R_PPC_EMB_RELSDA = 116, |
| 94 | |
| 95 | /* This is a phony reloc to handle any old fashioned TOC16 references |
| 96 | that may still be in object files. */ |
| 97 | R_PPC_TOC16 = 255, |
| 98 | |
| 99 | R_PPC_max |
| 100 | }; |
| 101 | |
| 102 | static reloc_howto_type *ppc_elf_reloc_type_lookup |
| 103 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| 104 | static void ppc_elf_info_to_howto |
| 105 | PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst)); |
| 106 | static void ppc_elf_howto_init PARAMS ((void)); |
| 107 | static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword)); |
| 108 | static boolean ppc_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *)); |
| 109 | static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); |
| 110 | |
| 111 | static int ppc_elf_additional_program_headers PARAMS ((bfd *)); |
| 112 | static boolean ppc_elf_modify_segment_map PARAMS ((bfd *)); |
| 113 | |
| 114 | static boolean ppc_elf_section_from_shdr PARAMS ((bfd *, |
| 115 | Elf32_Internal_Shdr *, |
| 116 | char *)); |
| 117 | |
| 118 | static elf_linker_section_t *ppc_elf_create_linker_section |
| 119 | PARAMS ((bfd *abfd, |
| 120 | struct bfd_link_info *info, |
| 121 | enum elf_linker_section_enum)); |
| 122 | |
| 123 | static boolean ppc_elf_check_relocs PARAMS ((bfd *, |
| 124 | struct bfd_link_info *, |
| 125 | asection *, |
| 126 | const Elf_Internal_Rela *)); |
| 127 | |
| 128 | static boolean ppc_elf_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *, |
| 129 | struct elf_link_hash_entry *)); |
| 130 | |
| 131 | static boolean ppc_elf_adjust_dynindx PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 132 | |
| 133 | static boolean ppc_elf_size_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); |
| 134 | |
| 135 | static boolean ppc_elf_relocate_section PARAMS ((bfd *, |
| 136 | struct bfd_link_info *info, |
| 137 | bfd *, |
| 138 | asection *, |
| 139 | bfd_byte *, |
| 140 | Elf_Internal_Rela *relocs, |
| 141 | Elf_Internal_Sym *local_syms, |
| 142 | asection **)); |
| 143 | |
| 144 | static boolean ppc_elf_add_symbol_hook PARAMS ((bfd *, |
| 145 | struct bfd_link_info *, |
| 146 | const Elf_Internal_Sym *, |
| 147 | const char **, |
| 148 | flagword *, |
| 149 | asection **, |
| 150 | bfd_vma *)); |
| 151 | |
| 152 | static boolean ppc_elf_finish_dynamic_symbol PARAMS ((bfd *, |
| 153 | struct bfd_link_info *, |
| 154 | struct elf_link_hash_entry *, |
| 155 | Elf_Internal_Sym *)); |
| 156 | |
| 157 | static boolean ppc_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); |
| 158 | |
| 159 | #define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */ |
| 160 | #define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */ |
| 161 | #define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */ |
| 162 | |
| 163 | /* The name of the dynamic interpreter. This is put in the .interp |
| 164 | section. */ |
| 165 | |
| 166 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 167 | |
| 168 | /* The size in bytes of an entry in the procedure linkage table, and of the initial size |
| 169 | of the plt reserved for the dynamic linker. */ |
| 170 | |
| 171 | #define PLT_ENTRY_SIZE 12 |
| 172 | #define PLT_INITIAL_ENTRY_SIZE 72 |
| 173 | |
| 174 | \f |
| 175 | static reloc_howto_type *ppc_elf_howto_table[ (int)R_PPC_max ]; |
| 176 | |
| 177 | static reloc_howto_type ppc_elf_howto_raw[] = |
| 178 | { |
| 179 | /* This reloc does nothing. */ |
| 180 | HOWTO (R_PPC_NONE, /* type */ |
| 181 | 0, /* rightshift */ |
| 182 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 183 | 32, /* bitsize */ |
| 184 | false, /* pc_relative */ |
| 185 | 0, /* bitpos */ |
| 186 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 187 | bfd_elf_generic_reloc, /* special_function */ |
| 188 | "R_PPC_NONE", /* name */ |
| 189 | false, /* partial_inplace */ |
| 190 | 0, /* src_mask */ |
| 191 | 0, /* dst_mask */ |
| 192 | false), /* pcrel_offset */ |
| 193 | |
| 194 | /* A standard 32 bit relocation. */ |
| 195 | HOWTO (R_PPC_ADDR32, /* type */ |
| 196 | 0, /* rightshift */ |
| 197 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 198 | 32, /* bitsize */ |
| 199 | false, /* pc_relative */ |
| 200 | 0, /* bitpos */ |
| 201 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 202 | bfd_elf_generic_reloc, /* special_function */ |
| 203 | "R_PPC_ADDR32", /* name */ |
| 204 | false, /* partial_inplace */ |
| 205 | 0, /* src_mask */ |
| 206 | 0xffffffff, /* dst_mask */ |
| 207 | false), /* pcrel_offset */ |
| 208 | |
| 209 | /* An absolute 26 bit branch; the lower two bits must be zero. |
| 210 | FIXME: we don't check that, we just clear them. */ |
| 211 | HOWTO (R_PPC_ADDR24, /* type */ |
| 212 | 0, /* rightshift */ |
| 213 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 214 | 26, /* bitsize */ |
| 215 | false, /* pc_relative */ |
| 216 | 0, /* bitpos */ |
| 217 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 218 | bfd_elf_generic_reloc, /* special_function */ |
| 219 | "R_PPC_ADDR24", /* name */ |
| 220 | false, /* partial_inplace */ |
| 221 | 0, /* src_mask */ |
| 222 | 0x3fffffc, /* dst_mask */ |
| 223 | false), /* pcrel_offset */ |
| 224 | |
| 225 | /* A standard 16 bit relocation. */ |
| 226 | HOWTO (R_PPC_ADDR16, /* type */ |
| 227 | 0, /* rightshift */ |
| 228 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 229 | 16, /* bitsize */ |
| 230 | false, /* pc_relative */ |
| 231 | 0, /* bitpos */ |
| 232 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 233 | bfd_elf_generic_reloc, /* special_function */ |
| 234 | "R_PPC_ADDR16", /* name */ |
| 235 | false, /* partial_inplace */ |
| 236 | 0, /* src_mask */ |
| 237 | 0xffff, /* dst_mask */ |
| 238 | false), /* pcrel_offset */ |
| 239 | |
| 240 | /* A 16 bit relocation without overflow. */ |
| 241 | HOWTO (R_PPC_ADDR16_LO, /* type */ |
| 242 | 0, /* rightshift */ |
| 243 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 244 | 16, /* bitsize */ |
| 245 | false, /* pc_relative */ |
| 246 | 0, /* bitpos */ |
| 247 | complain_overflow_dont,/* complain_on_overflow */ |
| 248 | bfd_elf_generic_reloc, /* special_function */ |
| 249 | "R_PPC_ADDR16_LO", /* name */ |
| 250 | false, /* partial_inplace */ |
| 251 | 0, /* src_mask */ |
| 252 | 0xffff, /* dst_mask */ |
| 253 | false), /* pcrel_offset */ |
| 254 | |
| 255 | /* The high order 16 bits of an address. */ |
| 256 | HOWTO (R_PPC_ADDR16_HI, /* type */ |
| 257 | 16, /* rightshift */ |
| 258 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 259 | 16, /* bitsize */ |
| 260 | false, /* pc_relative */ |
| 261 | 0, /* bitpos */ |
| 262 | complain_overflow_dont, /* complain_on_overflow */ |
| 263 | bfd_elf_generic_reloc, /* special_function */ |
| 264 | "R_PPC_ADDR16_HI", /* name */ |
| 265 | false, /* partial_inplace */ |
| 266 | 0, /* src_mask */ |
| 267 | 0xffff, /* dst_mask */ |
| 268 | false), /* pcrel_offset */ |
| 269 | |
| 270 | /* The high order 16 bits of an address, plus 1 if the contents of |
| 271 | the low 16 bits, treated as a signed number, is negative. */ |
| 272 | HOWTO (R_PPC_ADDR16_HA, /* type */ |
| 273 | 16, /* rightshift */ |
| 274 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 275 | 16, /* bitsize */ |
| 276 | false, /* pc_relative */ |
| 277 | 0, /* bitpos */ |
| 278 | complain_overflow_dont, /* complain_on_overflow */ |
| 279 | bfd_elf_generic_reloc, /* special_function */ |
| 280 | "R_PPC_ADDR16_HA", /* name */ |
| 281 | false, /* partial_inplace */ |
| 282 | 0, /* src_mask */ |
| 283 | 0xffff, /* dst_mask */ |
| 284 | false), /* pcrel_offset */ |
| 285 | |
| 286 | /* An absolute 16 bit branch; the lower two bits must be zero. |
| 287 | FIXME: we don't check that, we just clear them. */ |
| 288 | HOWTO (R_PPC_ADDR14, /* type */ |
| 289 | 0, /* rightshift */ |
| 290 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 291 | 16, /* bitsize */ |
| 292 | false, /* pc_relative */ |
| 293 | 0, /* bitpos */ |
| 294 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 295 | bfd_elf_generic_reloc, /* special_function */ |
| 296 | "R_PPC_ADDR14", /* name */ |
| 297 | false, /* partial_inplace */ |
| 298 | 0, /* src_mask */ |
| 299 | 0xfffc, /* dst_mask */ |
| 300 | false), /* pcrel_offset */ |
| 301 | |
| 302 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 303 | indicate that the branch is expected to be taken. The lower two |
| 304 | bits must be zero. */ |
| 305 | HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ |
| 306 | 0, /* rightshift */ |
| 307 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 308 | 16, /* bitsize */ |
| 309 | false, /* pc_relative */ |
| 310 | 0, /* bitpos */ |
| 311 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 312 | bfd_elf_generic_reloc, /* special_function */ |
| 313 | "R_PPC_ADDR14_BRTAKEN",/* name */ |
| 314 | false, /* partial_inplace */ |
| 315 | 0, /* src_mask */ |
| 316 | 0xfffc, /* dst_mask */ |
| 317 | false), /* pcrel_offset */ |
| 318 | |
| 319 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 320 | indicate that the branch is not expected to be taken. The lower |
| 321 | two bits must be zero. */ |
| 322 | HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ |
| 323 | 0, /* rightshift */ |
| 324 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 325 | 16, /* bitsize */ |
| 326 | false, /* pc_relative */ |
| 327 | 0, /* bitpos */ |
| 328 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 329 | bfd_elf_generic_reloc, /* special_function */ |
| 330 | "R_PPC_ADDR14_BRNTAKEN",/* name */ |
| 331 | false, /* partial_inplace */ |
| 332 | 0, /* src_mask */ |
| 333 | 0xfffc, /* dst_mask */ |
| 334 | false), /* pcrel_offset */ |
| 335 | |
| 336 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
| 337 | HOWTO (R_PPC_REL24, /* type */ |
| 338 | 0, /* rightshift */ |
| 339 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 340 | 26, /* bitsize */ |
| 341 | true, /* pc_relative */ |
| 342 | 0, /* bitpos */ |
| 343 | complain_overflow_signed, /* complain_on_overflow */ |
| 344 | bfd_elf_generic_reloc, /* special_function */ |
| 345 | "R_PPC_REL24", /* name */ |
| 346 | false, /* partial_inplace */ |
| 347 | 0, /* src_mask */ |
| 348 | 0x3fffffc, /* dst_mask */ |
| 349 | true), /* pcrel_offset */ |
| 350 | |
| 351 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
| 352 | HOWTO (R_PPC_REL14, /* type */ |
| 353 | 0, /* rightshift */ |
| 354 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 355 | 16, /* bitsize */ |
| 356 | true, /* pc_relative */ |
| 357 | 0, /* bitpos */ |
| 358 | complain_overflow_signed, /* complain_on_overflow */ |
| 359 | bfd_elf_generic_reloc, /* special_function */ |
| 360 | "R_PPC_REL14", /* name */ |
| 361 | false, /* partial_inplace */ |
| 362 | 0, /* src_mask */ |
| 363 | 0xfffc, /* dst_mask */ |
| 364 | true), /* pcrel_offset */ |
| 365 | |
| 366 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 367 | the branch is expected to be taken. The lower two bits must be |
| 368 | zero. */ |
| 369 | HOWTO (R_PPC_REL14_BRTAKEN, /* type */ |
| 370 | 0, /* rightshift */ |
| 371 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 372 | 16, /* bitsize */ |
| 373 | true, /* pc_relative */ |
| 374 | 0, /* bitpos */ |
| 375 | complain_overflow_signed, /* complain_on_overflow */ |
| 376 | bfd_elf_generic_reloc, /* special_function */ |
| 377 | "R_PPC_REL14_BRTAKEN", /* name */ |
| 378 | false, /* partial_inplace */ |
| 379 | 0, /* src_mask */ |
| 380 | 0xfffc, /* dst_mask */ |
| 381 | true), /* pcrel_offset */ |
| 382 | |
| 383 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 384 | the branch is not expected to be taken. The lower two bits must |
| 385 | be zero. */ |
| 386 | HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ |
| 387 | 0, /* rightshift */ |
| 388 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 389 | 16, /* bitsize */ |
| 390 | true, /* pc_relative */ |
| 391 | 0, /* bitpos */ |
| 392 | complain_overflow_signed, /* complain_on_overflow */ |
| 393 | bfd_elf_generic_reloc, /* special_function */ |
| 394 | "R_PPC_REL14_BRNTAKEN",/* name */ |
| 395 | false, /* partial_inplace */ |
| 396 | 0, /* src_mask */ |
| 397 | 0xfffc, /* dst_mask */ |
| 398 | true), /* pcrel_offset */ |
| 399 | |
| 400 | /* Like R_PPC_ADDR16, but referring to the GOT table entry for the |
| 401 | symbol. */ |
| 402 | HOWTO (R_PPC_GOT16, /* type */ |
| 403 | 0, /* rightshift */ |
| 404 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 405 | 16, /* bitsize */ |
| 406 | false, /* pc_relative */ |
| 407 | 0, /* bitpos */ |
| 408 | complain_overflow_signed, /* complain_on_overflow */ |
| 409 | bfd_elf_generic_reloc, /* special_function */ |
| 410 | "R_PPC_GOT16", /* name */ |
| 411 | false, /* partial_inplace */ |
| 412 | 0, /* src_mask */ |
| 413 | 0xffff, /* dst_mask */ |
| 414 | false), /* pcrel_offset */ |
| 415 | |
| 416 | /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for |
| 417 | the symbol. */ |
| 418 | HOWTO (R_PPC_GOT16_LO, /* type */ |
| 419 | 0, /* rightshift */ |
| 420 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 421 | 16, /* bitsize */ |
| 422 | false, /* pc_relative */ |
| 423 | 0, /* bitpos */ |
| 424 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 425 | bfd_elf_generic_reloc, /* special_function */ |
| 426 | "R_PPC_GOT16_LO", /* name */ |
| 427 | false, /* partial_inplace */ |
| 428 | 0, /* src_mask */ |
| 429 | 0xffff, /* dst_mask */ |
| 430 | false), /* pcrel_offset */ |
| 431 | |
| 432 | /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for |
| 433 | the symbol. */ |
| 434 | HOWTO (R_PPC_GOT16_HI, /* type */ |
| 435 | 16, /* rightshift */ |
| 436 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 437 | 16, /* bitsize */ |
| 438 | false, /* pc_relative */ |
| 439 | 0, /* bitpos */ |
| 440 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 441 | bfd_elf_generic_reloc, /* special_function */ |
| 442 | "R_PPC_GOT16_HI", /* name */ |
| 443 | false, /* partial_inplace */ |
| 444 | 0, /* src_mask */ |
| 445 | 0xffff, /* dst_mask */ |
| 446 | false), /* pcrel_offset */ |
| 447 | |
| 448 | /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for |
| 449 | the symbol. */ |
| 450 | HOWTO (R_PPC_GOT16_HA, /* type */ |
| 451 | 0, /* rightshift */ |
| 452 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 453 | 16, /* bitsize */ |
| 454 | false, /* pc_relative */ |
| 455 | 0, /* bitpos */ |
| 456 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 457 | bfd_elf_generic_reloc, /* special_function */ |
| 458 | "R_PPC_GOT16_HA", /* name */ |
| 459 | false, /* partial_inplace */ |
| 460 | 0, /* src_mask */ |
| 461 | 0xffff, /* dst_mask */ |
| 462 | false), /* pcrel_offset */ |
| 463 | |
| 464 | /* Like R_PPC_REL24, but referring to the procedure linkage table |
| 465 | entry for the symbol. FIXME: Not supported. */ |
| 466 | HOWTO (R_PPC_PLTREL24, /* type */ |
| 467 | 0, /* rightshift */ |
| 468 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 469 | 26, /* bitsize */ |
| 470 | true, /* pc_relative */ |
| 471 | 0, /* bitpos */ |
| 472 | complain_overflow_signed, /* complain_on_overflow */ |
| 473 | bfd_elf_generic_reloc, /* special_function */ |
| 474 | "R_PPC_PLTREL24", /* name */ |
| 475 | false, /* partial_inplace */ |
| 476 | 0, /* src_mask */ |
| 477 | 0x3fffffc, /* dst_mask */ |
| 478 | true), /* pcrel_offset */ |
| 479 | |
| 480 | /* This is used only by the dynamic linker. The symbol should exist |
| 481 | both in the object being run and in some shared library. The |
| 482 | dynamic linker copies the data addressed by the symbol from the |
| 483 | shared library into the object. I have no idea what the purpose |
| 484 | of this is. */ |
| 485 | HOWTO (R_PPC_COPY, /* 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_COPY", /* name */ |
| 494 | false, /* partial_inplace */ |
| 495 | 0, /* src_mask */ |
| 496 | 0, /* dst_mask */ |
| 497 | false), /* pcrel_offset */ |
| 498 | |
| 499 | /* Like R_PPC_ADDR32, but used when setting global offset table |
| 500 | entries. */ |
| 501 | HOWTO (R_PPC_GLOB_DAT, /* type */ |
| 502 | 0, /* rightshift */ |
| 503 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 504 | 32, /* bitsize */ |
| 505 | false, /* pc_relative */ |
| 506 | 0, /* bitpos */ |
| 507 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 508 | bfd_elf_generic_reloc, /* special_function */ |
| 509 | "R_PPC_GLOB_DAT", /* name */ |
| 510 | false, /* partial_inplace */ |
| 511 | 0, /* src_mask */ |
| 512 | 0xffffffff, /* dst_mask */ |
| 513 | false), /* pcrel_offset */ |
| 514 | |
| 515 | /* Marks a procedure linkage table entry for a symbol. */ |
| 516 | HOWTO (R_PPC_JMP_SLOT, /* type */ |
| 517 | 0, /* rightshift */ |
| 518 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 519 | 32, /* bitsize */ |
| 520 | false, /* pc_relative */ |
| 521 | 0, /* bitpos */ |
| 522 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 523 | bfd_elf_generic_reloc, /* special_function */ |
| 524 | "R_PPC_JMP_SLOT", /* name */ |
| 525 | false, /* partial_inplace */ |
| 526 | 0, /* src_mask */ |
| 527 | 0, /* dst_mask */ |
| 528 | false), /* pcrel_offset */ |
| 529 | |
| 530 | /* Used only by the dynamic linker. When the object is run, this |
| 531 | longword is set to the load address of the object, plus the |
| 532 | addend. */ |
| 533 | HOWTO (R_PPC_RELATIVE, /* type */ |
| 534 | 0, /* rightshift */ |
| 535 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 536 | 32, /* bitsize */ |
| 537 | false, /* pc_relative */ |
| 538 | 0, /* bitpos */ |
| 539 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 540 | bfd_elf_generic_reloc, /* special_function */ |
| 541 | "R_PPC_RELATIVE", /* name */ |
| 542 | false, /* partial_inplace */ |
| 543 | 0, /* src_mask */ |
| 544 | 0xffffffff, /* dst_mask */ |
| 545 | false), /* pcrel_offset */ |
| 546 | |
| 547 | /* Like R_PPC_REL24, but uses the value of the symbol within the |
| 548 | object rather than the final value. Normally used for |
| 549 | _GLOBAL_OFFSET_TABLE_. FIXME: Not supported. */ |
| 550 | HOWTO (R_PPC_LOCAL24PC, /* type */ |
| 551 | 0, /* rightshift */ |
| 552 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 553 | 26, /* bitsize */ |
| 554 | true, /* pc_relative */ |
| 555 | 0, /* bitpos */ |
| 556 | complain_overflow_signed, /* complain_on_overflow */ |
| 557 | bfd_elf_generic_reloc, /* special_function */ |
| 558 | "R_PPC_LOCAL24PC", /* name */ |
| 559 | false, /* partial_inplace */ |
| 560 | 0, /* src_mask */ |
| 561 | 0x3fffffc, /* dst_mask */ |
| 562 | true), /* pcrel_offset */ |
| 563 | |
| 564 | /* Like R_PPC_ADDR32, but may be unaligned. */ |
| 565 | HOWTO (R_PPC_UADDR32, /* type */ |
| 566 | 0, /* rightshift */ |
| 567 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 568 | 32, /* bitsize */ |
| 569 | false, /* pc_relative */ |
| 570 | 0, /* bitpos */ |
| 571 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 572 | bfd_elf_generic_reloc, /* special_function */ |
| 573 | "R_PPC_UADDR32", /* name */ |
| 574 | false, /* partial_inplace */ |
| 575 | 0, /* src_mask */ |
| 576 | 0xffffffff, /* dst_mask */ |
| 577 | false), /* pcrel_offset */ |
| 578 | |
| 579 | /* Like R_PPC_ADDR16, but may be unaligned. */ |
| 580 | HOWTO (R_PPC_UADDR16, /* type */ |
| 581 | 0, /* rightshift */ |
| 582 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 583 | 16, /* bitsize */ |
| 584 | false, /* pc_relative */ |
| 585 | 0, /* bitpos */ |
| 586 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 587 | bfd_elf_generic_reloc, /* special_function */ |
| 588 | "R_PPC_UADDR16", /* name */ |
| 589 | false, /* partial_inplace */ |
| 590 | 0, /* src_mask */ |
| 591 | 0xffff, /* dst_mask */ |
| 592 | false), /* pcrel_offset */ |
| 593 | |
| 594 | /* 32-bit PC relative */ |
| 595 | HOWTO (R_PPC_REL32, /* type */ |
| 596 | 0, /* rightshift */ |
| 597 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 598 | 32, /* bitsize */ |
| 599 | true, /* pc_relative */ |
| 600 | 0, /* bitpos */ |
| 601 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 602 | bfd_elf_generic_reloc, /* special_function */ |
| 603 | "R_PPC_REL32", /* name */ |
| 604 | false, /* partial_inplace */ |
| 605 | 0, /* src_mask */ |
| 606 | 0xffffffff, /* dst_mask */ |
| 607 | true), /* pcrel_offset */ |
| 608 | |
| 609 | /* 32-bit relocation to the symbol's procedure linkage table. |
| 610 | FIXEME: not supported. */ |
| 611 | HOWTO (R_PPC_PLT32, /* type */ |
| 612 | 0, /* rightshift */ |
| 613 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 614 | 32, /* 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_PLT32", /* name */ |
| 620 | false, /* partial_inplace */ |
| 621 | 0, /* src_mask */ |
| 622 | 0, /* dst_mask */ |
| 623 | false), /* pcrel_offset */ |
| 624 | |
| 625 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| 626 | FIXEME: not supported. */ |
| 627 | HOWTO (R_PPC_PLTREL32, /* type */ |
| 628 | 0, /* rightshift */ |
| 629 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 630 | 32, /* bitsize */ |
| 631 | true, /* pc_relative */ |
| 632 | 0, /* bitpos */ |
| 633 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 634 | bfd_elf_generic_reloc, /* special_function */ |
| 635 | "R_PPC_PLTREL32", /* name */ |
| 636 | false, /* partial_inplace */ |
| 637 | 0, /* src_mask */ |
| 638 | 0, /* dst_mask */ |
| 639 | true), /* pcrel_offset */ |
| 640 | |
| 641 | /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for |
| 642 | the symbol. */ |
| 643 | HOWTO (R_PPC_PLT16_LO, /* 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_bitfield, /* complain_on_overflow */ |
| 650 | bfd_elf_generic_reloc, /* special_function */ |
| 651 | "R_PPC_PLT16_LO", /* name */ |
| 652 | false, /* partial_inplace */ |
| 653 | 0, /* src_mask */ |
| 654 | 0xffff, /* dst_mask */ |
| 655 | false), /* pcrel_offset */ |
| 656 | |
| 657 | /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for |
| 658 | the symbol. */ |
| 659 | HOWTO (R_PPC_PLT16_HI, /* type */ |
| 660 | 16, /* rightshift */ |
| 661 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 662 | 16, /* bitsize */ |
| 663 | false, /* pc_relative */ |
| 664 | 0, /* bitpos */ |
| 665 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 666 | bfd_elf_generic_reloc, /* special_function */ |
| 667 | "R_PPC_PLT16_HI", /* name */ |
| 668 | false, /* partial_inplace */ |
| 669 | 0, /* src_mask */ |
| 670 | 0xffff, /* dst_mask */ |
| 671 | false), /* pcrel_offset */ |
| 672 | |
| 673 | /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for |
| 674 | the symbol. FIXME: Not supported. */ |
| 675 | HOWTO (R_PPC_PLT16_HA, /* type */ |
| 676 | 0, /* rightshift */ |
| 677 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 678 | 16, /* bitsize */ |
| 679 | false, /* pc_relative */ |
| 680 | 0, /* bitpos */ |
| 681 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 682 | bfd_elf_generic_reloc, /* special_function */ |
| 683 | "R_PPC_PLT16_HA", /* name */ |
| 684 | false, /* partial_inplace */ |
| 685 | 0, /* src_mask */ |
| 686 | 0xffff, /* dst_mask */ |
| 687 | false), /* pcrel_offset */ |
| 688 | |
| 689 | /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with |
| 690 | small data items. */ |
| 691 | HOWTO (R_PPC_SDAREL16, /* type */ |
| 692 | 0, /* rightshift */ |
| 693 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 694 | 16, /* bitsize */ |
| 695 | false, /* pc_relative */ |
| 696 | 0, /* bitpos */ |
| 697 | complain_overflow_signed, /* complain_on_overflow */ |
| 698 | bfd_elf_generic_reloc, /* special_function */ |
| 699 | "R_PPC_SDAREL16", /* name */ |
| 700 | false, /* partial_inplace */ |
| 701 | 0, /* src_mask */ |
| 702 | 0xffff, /* dst_mask */ |
| 703 | false), /* pcrel_offset */ |
| 704 | |
| 705 | /* 32-bit section relative relocation. */ |
| 706 | HOWTO (R_PPC_SECTOFF, /* type */ |
| 707 | 0, /* rightshift */ |
| 708 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 709 | 32, /* bitsize */ |
| 710 | true, /* pc_relative */ |
| 711 | 0, /* bitpos */ |
| 712 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 713 | bfd_elf_generic_reloc, /* special_function */ |
| 714 | "R_PPC_SECTOFF", /* name */ |
| 715 | false, /* partial_inplace */ |
| 716 | 0, /* src_mask */ |
| 717 | 0, /* dst_mask */ |
| 718 | true), /* pcrel_offset */ |
| 719 | |
| 720 | /* 16-bit lower half section relative relocation. */ |
| 721 | HOWTO (R_PPC_SECTOFF_LO, /* type */ |
| 722 | 0, /* rightshift */ |
| 723 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 724 | 16, /* 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_SECTOFF_LO", /* name */ |
| 730 | false, /* partial_inplace */ |
| 731 | 0, /* src_mask */ |
| 732 | 0xffff, /* dst_mask */ |
| 733 | false), /* pcrel_offset */ |
| 734 | |
| 735 | /* 16-bit upper half section relative relocation. */ |
| 736 | HOWTO (R_PPC_SECTOFF_HI, /* type */ |
| 737 | 16, /* 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_SECTOFF_HI", /* name */ |
| 745 | false, /* partial_inplace */ |
| 746 | 0, /* src_mask */ |
| 747 | 0xffff, /* dst_mask */ |
| 748 | false), /* pcrel_offset */ |
| 749 | |
| 750 | /* 16-bit upper half adjusted section relative relocation. */ |
| 751 | HOWTO (R_PPC_SECTOFF_HA, /* 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_bitfield, /* complain_on_overflow */ |
| 758 | bfd_elf_generic_reloc, /* special_function */ |
| 759 | "R_PPC_SECTOFF_HA", /* name */ |
| 760 | false, /* partial_inplace */ |
| 761 | 0, /* src_mask */ |
| 762 | 0xffff, /* dst_mask */ |
| 763 | false), /* pcrel_offset */ |
| 764 | |
| 765 | /* The remaining relocs are from the Embedded ELF ABI, and are not |
| 766 | in the SVR4 ELF ABI. */ |
| 767 | |
| 768 | /* 32 bit value resulting from the addend minus the symbol */ |
| 769 | HOWTO (R_PPC_EMB_NADDR32, /* type */ |
| 770 | 0, /* rightshift */ |
| 771 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 772 | 32, /* bitsize */ |
| 773 | false, /* pc_relative */ |
| 774 | 0, /* bitpos */ |
| 775 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 776 | bfd_elf_generic_reloc, /* special_function */ |
| 777 | "R_PPC_EMB_NADDR32", /* name */ |
| 778 | false, /* partial_inplace */ |
| 779 | 0, /* src_mask */ |
| 780 | 0xffffffff, /* dst_mask */ |
| 781 | false), /* pcrel_offset */ |
| 782 | |
| 783 | /* 16 bit value resulting from the addend minus the symbol */ |
| 784 | HOWTO (R_PPC_EMB_NADDR16, /* type */ |
| 785 | 0, /* rightshift */ |
| 786 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 787 | 16, /* bitsize */ |
| 788 | false, /* pc_relative */ |
| 789 | 0, /* bitpos */ |
| 790 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 791 | bfd_elf_generic_reloc, /* special_function */ |
| 792 | "R_PPC_EMB_NADDR16", /* name */ |
| 793 | false, /* partial_inplace */ |
| 794 | 0, /* src_mask */ |
| 795 | 0xffff, /* dst_mask */ |
| 796 | false), /* pcrel_offset */ |
| 797 | |
| 798 | /* 16 bit value resulting from the addend minus the symbol */ |
| 799 | HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ |
| 800 | 0, /* rightshift */ |
| 801 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 802 | 16, /* bitsize */ |
| 803 | false, /* pc_relative */ |
| 804 | 0, /* bitpos */ |
| 805 | complain_overflow_dont,/* complain_on_overflow */ |
| 806 | bfd_elf_generic_reloc, /* special_function */ |
| 807 | "R_PPC_EMB_ADDR16_LO", /* name */ |
| 808 | false, /* partial_inplace */ |
| 809 | 0, /* src_mask */ |
| 810 | 0xffff, /* dst_mask */ |
| 811 | false), /* pcrel_offset */ |
| 812 | |
| 813 | /* The high order 16 bits of the addend minus the symbol */ |
| 814 | HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ |
| 815 | 16, /* rightshift */ |
| 816 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 817 | 16, /* bitsize */ |
| 818 | false, /* pc_relative */ |
| 819 | 0, /* bitpos */ |
| 820 | complain_overflow_dont, /* complain_on_overflow */ |
| 821 | bfd_elf_generic_reloc, /* special_function */ |
| 822 | "R_PPC_EMB_NADDR16_HI", /* name */ |
| 823 | false, /* partial_inplace */ |
| 824 | 0, /* src_mask */ |
| 825 | 0xffff, /* dst_mask */ |
| 826 | false), /* pcrel_offset */ |
| 827 | |
| 828 | /* The high order 16 bits of the result of the addend minus the address, |
| 829 | plus 1 if the contents of the low 16 bits, treated as a signed number, |
| 830 | is negative. */ |
| 831 | HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ |
| 832 | 16, /* rightshift */ |
| 833 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 834 | 16, /* bitsize */ |
| 835 | false, /* pc_relative */ |
| 836 | 0, /* bitpos */ |
| 837 | complain_overflow_dont, /* complain_on_overflow */ |
| 838 | bfd_elf_generic_reloc, /* special_function */ |
| 839 | "R_PPC_EMB_NADDR16_HA", /* name */ |
| 840 | false, /* partial_inplace */ |
| 841 | 0, /* src_mask */ |
| 842 | 0xffff, /* dst_mask */ |
| 843 | false), /* pcrel_offset */ |
| 844 | |
| 845 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 846 | address in the .sdata section, and returning the offset from |
| 847 | _SDA_BASE_ for that relocation */ |
| 848 | HOWTO (R_PPC_EMB_SDAI16, /* type */ |
| 849 | 0, /* rightshift */ |
| 850 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 851 | 16, /* bitsize */ |
| 852 | false, /* pc_relative */ |
| 853 | 0, /* bitpos */ |
| 854 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 855 | bfd_elf_generic_reloc, /* special_function */ |
| 856 | "R_PPC_EMB_SDAI16", /* name */ |
| 857 | false, /* partial_inplace */ |
| 858 | 0, /* src_mask */ |
| 859 | 0xffff, /* dst_mask */ |
| 860 | false), /* pcrel_offset */ |
| 861 | |
| 862 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 863 | address in the .sdata2 section, and returning the offset from |
| 864 | _SDA2_BASE_ for that relocation */ |
| 865 | HOWTO (R_PPC_EMB_SDA2I16, /* type */ |
| 866 | 0, /* rightshift */ |
| 867 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 868 | 16, /* bitsize */ |
| 869 | false, /* pc_relative */ |
| 870 | 0, /* bitpos */ |
| 871 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 872 | bfd_elf_generic_reloc, /* special_function */ |
| 873 | "R_PPC_EMB_SDA2I16", /* name */ |
| 874 | false, /* partial_inplace */ |
| 875 | 0, /* src_mask */ |
| 876 | 0xffff, /* dst_mask */ |
| 877 | false), /* pcrel_offset */ |
| 878 | |
| 879 | /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with |
| 880 | small data items. */ |
| 881 | HOWTO (R_PPC_EMB_SDA2REL, /* type */ |
| 882 | 0, /* rightshift */ |
| 883 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 884 | 16, /* bitsize */ |
| 885 | false, /* pc_relative */ |
| 886 | 0, /* bitpos */ |
| 887 | complain_overflow_signed, /* complain_on_overflow */ |
| 888 | bfd_elf_generic_reloc, /* special_function */ |
| 889 | "R_PPC_EMB_SDA2REL", /* name */ |
| 890 | false, /* partial_inplace */ |
| 891 | 0, /* src_mask */ |
| 892 | 0xffff, /* dst_mask */ |
| 893 | false), /* pcrel_offset */ |
| 894 | |
| 895 | /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit |
| 896 | signed offset from the appropriate base, and filling in the register |
| 897 | field with the appropriate register (0, 2, or 13). */ |
| 898 | HOWTO (R_PPC_EMB_SDA21, /* type */ |
| 899 | 0, /* rightshift */ |
| 900 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 901 | 16, /* bitsize */ |
| 902 | false, /* pc_relative */ |
| 903 | 0, /* bitpos */ |
| 904 | complain_overflow_signed, /* complain_on_overflow */ |
| 905 | bfd_elf_generic_reloc, /* special_function */ |
| 906 | "R_PPC_EMB_SDA21", /* name */ |
| 907 | false, /* partial_inplace */ |
| 908 | 0, /* src_mask */ |
| 909 | 0xffff, /* dst_mask */ |
| 910 | false), /* pcrel_offset */ |
| 911 | |
| 912 | /* Relocation not handled: R_PPC_EMB_MRKREF */ |
| 913 | /* Relocation not handled: R_PPC_EMB_RELSEC16 */ |
| 914 | /* Relocation not handled: R_PPC_EMB_RELST_LO */ |
| 915 | /* Relocation not handled: R_PPC_EMB_RELST_HI */ |
| 916 | /* Relocation not handled: R_PPC_EMB_RELST_HA */ |
| 917 | /* Relocation not handled: R_PPC_EMB_BIT_FLD */ |
| 918 | |
| 919 | /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling |
| 920 | in the 16 bit signed offset from the appropriate base, and filling in the |
| 921 | register field with the appropriate register (0, 2, or 13). */ |
| 922 | HOWTO (R_PPC_EMB_RELSDA, /* type */ |
| 923 | 0, /* rightshift */ |
| 924 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 925 | 16, /* bitsize */ |
| 926 | true, /* pc_relative */ |
| 927 | 0, /* bitpos */ |
| 928 | complain_overflow_signed, /* complain_on_overflow */ |
| 929 | bfd_elf_generic_reloc, /* special_function */ |
| 930 | "R_PPC_EMB_RELSDA", /* name */ |
| 931 | false, /* partial_inplace */ |
| 932 | 0, /* src_mask */ |
| 933 | 0xffff, /* dst_mask */ |
| 934 | false), /* pcrel_offset */ |
| 935 | |
| 936 | /* Phony reloc to handle AIX style TOC entries */ |
| 937 | HOWTO (R_PPC_TOC16, /* type */ |
| 938 | 0, /* rightshift */ |
| 939 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 940 | 16, /* bitsize */ |
| 941 | false, /* pc_relative */ |
| 942 | 0, /* bitpos */ |
| 943 | complain_overflow_signed, /* complain_on_overflow */ |
| 944 | bfd_elf_generic_reloc, /* special_function */ |
| 945 | "R_PPC_TOC16", /* name */ |
| 946 | false, /* partial_inplace */ |
| 947 | 0, /* src_mask */ |
| 948 | 0xffff, /* dst_mask */ |
| 949 | false), /* pcrel_offset */ |
| 950 | }; |
| 951 | |
| 952 | \f |
| 953 | /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ |
| 954 | |
| 955 | static void |
| 956 | ppc_elf_howto_init () |
| 957 | { |
| 958 | unsigned int i, type; |
| 959 | |
| 960 | for (i = 0; i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); i++) |
| 961 | { |
| 962 | type = ppc_elf_howto_raw[i].type; |
| 963 | BFD_ASSERT (type < sizeof(ppc_elf_howto_table) / sizeof(ppc_elf_howto_table[0])); |
| 964 | ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; |
| 965 | } |
| 966 | } |
| 967 | |
| 968 | \f |
| 969 | static reloc_howto_type * |
| 970 | ppc_elf_reloc_type_lookup (abfd, code) |
| 971 | bfd *abfd; |
| 972 | bfd_reloc_code_real_type code; |
| 973 | { |
| 974 | enum ppc_reloc_type ppc_reloc = R_PPC_NONE; |
| 975 | |
| 976 | if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */ |
| 977 | ppc_elf_howto_init (); |
| 978 | |
| 979 | switch ((int)code) |
| 980 | { |
| 981 | default: |
| 982 | return (reloc_howto_type *)NULL; |
| 983 | |
| 984 | case BFD_RELOC_NONE: ppc_reloc = R_PPC_NONE; break; |
| 985 | case BFD_RELOC_32: ppc_reloc = R_PPC_ADDR32; break; |
| 986 | case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC_ADDR24; break; |
| 987 | case BFD_RELOC_16: ppc_reloc = R_PPC_ADDR16; break; |
| 988 | case BFD_RELOC_LO16: ppc_reloc = R_PPC_ADDR16_LO; break; |
| 989 | case BFD_RELOC_HI16: ppc_reloc = R_PPC_ADDR16_HI; break; |
| 990 | case BFD_RELOC_HI16_S: ppc_reloc = R_PPC_ADDR16_HA; break; |
| 991 | case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC_ADDR14; break; |
| 992 | case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC_ADDR14_BRTAKEN; break; |
| 993 | case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC_ADDR14_BRNTAKEN; break; |
| 994 | case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC_REL24; break; |
| 995 | case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC_REL14; break; |
| 996 | case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC_REL14_BRTAKEN; break; |
| 997 | case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC_REL14_BRNTAKEN; break; |
| 998 | case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC_GOT16; break; |
| 999 | case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC_GOT16_LO; break; |
| 1000 | case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC_GOT16_HI; break; |
| 1001 | case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC_GOT16_HA; break; |
| 1002 | case BFD_RELOC_24_PLT_PCREL: ppc_reloc = R_PPC_PLTREL24; break; |
| 1003 | case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC_COPY; break; |
| 1004 | case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC_GLOB_DAT; break; |
| 1005 | case BFD_RELOC_PPC_LOCAL24PC: ppc_reloc = R_PPC_LOCAL24PC; break; |
| 1006 | case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC_REL32; break; |
| 1007 | case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC_PLT32; break; |
| 1008 | case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC_PLTREL32; break; |
| 1009 | case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC_PLT16_LO; break; |
| 1010 | case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC_PLT16_HI; break; |
| 1011 | case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC_PLT16_HA; break; |
| 1012 | case BFD_RELOC_GPREL16: ppc_reloc = R_PPC_SDAREL16; break; |
| 1013 | case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC_SECTOFF; break; |
| 1014 | case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC_SECTOFF_LO; break; |
| 1015 | case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC_SECTOFF_HI; break; |
| 1016 | case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC_SECTOFF_HA; break; |
| 1017 | case BFD_RELOC_CTOR: ppc_reloc = R_PPC_ADDR32; break; |
| 1018 | case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC_TOC16; break; |
| 1019 | case BFD_RELOC_PPC_EMB_NADDR32: ppc_reloc = R_PPC_EMB_NADDR32; break; |
| 1020 | case BFD_RELOC_PPC_EMB_NADDR16: ppc_reloc = R_PPC_EMB_NADDR16; break; |
| 1021 | case BFD_RELOC_PPC_EMB_NADDR16_LO: ppc_reloc = R_PPC_EMB_NADDR16_LO; break; |
| 1022 | case BFD_RELOC_PPC_EMB_NADDR16_HI: ppc_reloc = R_PPC_EMB_NADDR16_HI; break; |
| 1023 | case BFD_RELOC_PPC_EMB_NADDR16_HA: ppc_reloc = R_PPC_EMB_NADDR16_HA; break; |
| 1024 | case BFD_RELOC_PPC_EMB_SDAI16: ppc_reloc = R_PPC_EMB_SDAI16; break; |
| 1025 | case BFD_RELOC_PPC_EMB_SDA2I16: ppc_reloc = R_PPC_EMB_SDA2I16; break; |
| 1026 | case BFD_RELOC_PPC_EMB_SDA2REL: ppc_reloc = R_PPC_EMB_SDA2REL; break; |
| 1027 | case BFD_RELOC_PPC_EMB_SDA21: ppc_reloc = R_PPC_EMB_SDA21; break; |
| 1028 | case BFD_RELOC_PPC_EMB_MRKREF: ppc_reloc = R_PPC_EMB_MRKREF; break; |
| 1029 | case BFD_RELOC_PPC_EMB_RELSEC16: ppc_reloc = R_PPC_EMB_RELSEC16; break; |
| 1030 | case BFD_RELOC_PPC_EMB_RELST_LO: ppc_reloc = R_PPC_EMB_RELST_LO; break; |
| 1031 | case BFD_RELOC_PPC_EMB_RELST_HI: ppc_reloc = R_PPC_EMB_RELST_HI; break; |
| 1032 | case BFD_RELOC_PPC_EMB_RELST_HA: ppc_reloc = R_PPC_EMB_RELST_HA; break; |
| 1033 | case BFD_RELOC_PPC_EMB_BIT_FLD: ppc_reloc = R_PPC_EMB_BIT_FLD; break; |
| 1034 | case BFD_RELOC_PPC_EMB_RELSDA: ppc_reloc = R_PPC_EMB_RELSDA; break; |
| 1035 | } |
| 1036 | |
| 1037 | return ppc_elf_howto_table[ (int)ppc_reloc ]; |
| 1038 | }; |
| 1039 | |
| 1040 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
| 1041 | |
| 1042 | static void |
| 1043 | ppc_elf_info_to_howto (abfd, cache_ptr, dst) |
| 1044 | bfd *abfd; |
| 1045 | arelent *cache_ptr; |
| 1046 | Elf32_Internal_Rela *dst; |
| 1047 | { |
| 1048 | if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */ |
| 1049 | ppc_elf_howto_init (); |
| 1050 | |
| 1051 | BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); |
| 1052 | cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; |
| 1053 | } |
| 1054 | |
| 1055 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
| 1056 | |
| 1057 | static boolean |
| 1058 | ppc_elf_set_private_flags (abfd, flags) |
| 1059 | bfd *abfd; |
| 1060 | flagword flags; |
| 1061 | { |
| 1062 | BFD_ASSERT (!elf_flags_init (abfd) |
| 1063 | || elf_elfheader (abfd)->e_flags == flags); |
| 1064 | |
| 1065 | elf_elfheader (abfd)->e_flags = flags; |
| 1066 | elf_flags_init (abfd) = true; |
| 1067 | return true; |
| 1068 | } |
| 1069 | |
| 1070 | /* Copy backend specific data from one object module to another */ |
| 1071 | static boolean |
| 1072 | ppc_elf_copy_private_bfd_data (ibfd, obfd) |
| 1073 | bfd *ibfd; |
| 1074 | bfd *obfd; |
| 1075 | { |
| 1076 | /* This function is selected based on the input vector. We only |
| 1077 | want to copy information over if the output BFD also uses Elf |
| 1078 | format. */ |
| 1079 | if (bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1080 | return true; |
| 1081 | |
| 1082 | BFD_ASSERT (!elf_flags_init (obfd) |
| 1083 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); |
| 1084 | |
| 1085 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
| 1086 | elf_flags_init (obfd) = true; |
| 1087 | return true; |
| 1088 | } |
| 1089 | |
| 1090 | /* Merge backend specific data from an object file to the output |
| 1091 | object file when linking */ |
| 1092 | static boolean |
| 1093 | ppc_elf_merge_private_bfd_data (ibfd, obfd) |
| 1094 | bfd *ibfd; |
| 1095 | bfd *obfd; |
| 1096 | { |
| 1097 | flagword old_flags; |
| 1098 | flagword new_flags; |
| 1099 | boolean error; |
| 1100 | |
| 1101 | /* Check if we have the same endianess */ |
| 1102 | if (ibfd->xvec->byteorder != obfd->xvec->byteorder |
| 1103 | && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) |
| 1104 | { |
| 1105 | (*_bfd_error_handler) |
| 1106 | ("%s: compiled for a %s endian system and target is %s endian", |
| 1107 | bfd_get_filename (ibfd), |
| 1108 | bfd_big_endian (ibfd) ? "big" : "little", |
| 1109 | bfd_big_endian (obfd) ? "big" : "little"); |
| 1110 | |
| 1111 | bfd_set_error (bfd_error_wrong_format); |
| 1112 | return false; |
| 1113 | } |
| 1114 | |
| 1115 | /* This function is selected based on the input vector. We only |
| 1116 | want to copy information over if the output BFD also uses Elf |
| 1117 | format. */ |
| 1118 | if (bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1119 | return true; |
| 1120 | |
| 1121 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 1122 | old_flags = elf_elfheader (obfd)->e_flags; |
| 1123 | if (!elf_flags_init (obfd)) /* First call, no flags set */ |
| 1124 | { |
| 1125 | elf_flags_init (obfd) = true; |
| 1126 | elf_elfheader (obfd)->e_flags = new_flags; |
| 1127 | } |
| 1128 | |
| 1129 | else if (new_flags == old_flags) /* Compatible flags are ok */ |
| 1130 | ; |
| 1131 | |
| 1132 | else /* Incompatible flags */ |
| 1133 | { |
| 1134 | /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked |
| 1135 | with either. */ |
| 1136 | error = false; |
| 1137 | if ((new_flags & EF_PPC_RELOCATABLE) != 0 |
| 1138 | && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) |
| 1139 | { |
| 1140 | error = true; |
| 1141 | (*_bfd_error_handler) |
| 1142 | ("%s: compiled with -mrelocatable and linked with modules compiled normally", |
| 1143 | bfd_get_filename (ibfd)); |
| 1144 | } |
| 1145 | else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 |
| 1146 | && (old_flags & EF_PPC_RELOCATABLE) != 0) |
| 1147 | { |
| 1148 | error = true; |
| 1149 | (*_bfd_error_handler) |
| 1150 | ("%s: compiled normally and linked with modules compiled with -mrelocatable", |
| 1151 | bfd_get_filename (ibfd)); |
| 1152 | } |
| 1153 | else if ((new_flags & EF_PPC_RELOCATABLE_LIB) != 0) |
| 1154 | elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE_LIB; |
| 1155 | |
| 1156 | |
| 1157 | /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if any module uses it */ |
| 1158 | elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); |
| 1159 | |
| 1160 | new_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 1161 | old_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 1162 | |
| 1163 | /* Warn about any other mismatches */ |
| 1164 | if (new_flags != old_flags) |
| 1165 | { |
| 1166 | error = true; |
| 1167 | (*_bfd_error_handler) |
| 1168 | ("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)", |
| 1169 | bfd_get_filename (ibfd), (long)new_flags, (long)old_flags); |
| 1170 | } |
| 1171 | |
| 1172 | if (error) |
| 1173 | { |
| 1174 | bfd_set_error (bfd_error_bad_value); |
| 1175 | return false; |
| 1176 | } |
| 1177 | } |
| 1178 | |
| 1179 | return true; |
| 1180 | } |
| 1181 | |
| 1182 | \f |
| 1183 | /* Handle a PowerPC specific section when reading an object file. This |
| 1184 | is called when elfcode.h finds a section with an unknown type. */ |
| 1185 | |
| 1186 | static boolean |
| 1187 | ppc_elf_section_from_shdr (abfd, hdr, name) |
| 1188 | bfd *abfd; |
| 1189 | Elf32_Internal_Shdr *hdr; |
| 1190 | char *name; |
| 1191 | { |
| 1192 | asection *newsect; |
| 1193 | flagword flags; |
| 1194 | |
| 1195 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 1196 | return false; |
| 1197 | |
| 1198 | newsect = hdr->bfd_section; |
| 1199 | flags = bfd_get_section_flags (abfd, newsect); |
| 1200 | if (hdr->sh_flags & SHF_EXCLUDE) |
| 1201 | flags |= SEC_EXCLUDE; |
| 1202 | |
| 1203 | if (hdr->sh_type == SHT_ORDERED) |
| 1204 | flags |= SEC_SORT_ENTRIES; |
| 1205 | |
| 1206 | bfd_set_section_flags (abfd, newsect, flags); |
| 1207 | return true; |
| 1208 | } |
| 1209 | |
| 1210 | \f |
| 1211 | /* Set up any other section flags and such that may be necessary. */ |
| 1212 | |
| 1213 | boolean |
| 1214 | ppc_elf_fake_sections (abfd, shdr, asect) |
| 1215 | bfd *abfd; |
| 1216 | Elf32_Internal_Shdr *shdr; |
| 1217 | asection *asect; |
| 1218 | { |
| 1219 | if ((asect->flags & SEC_EXCLUDE) != 0) |
| 1220 | shdr->sh_flags |= SHF_EXCLUDE; |
| 1221 | |
| 1222 | if ((asect->flags & SEC_SORT_ENTRIES) != 0) |
| 1223 | shdr->sh_type = SHT_ORDERED; |
| 1224 | |
| 1225 | return true; |
| 1226 | } |
| 1227 | |
| 1228 | \f |
| 1229 | /* Create a special linker section */ |
| 1230 | static elf_linker_section_t * |
| 1231 | ppc_elf_create_linker_section (abfd, info, which) |
| 1232 | bfd *abfd; |
| 1233 | struct bfd_link_info *info; |
| 1234 | enum elf_linker_section_enum which; |
| 1235 | { |
| 1236 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 1237 | elf_linker_section_t *lsect; |
| 1238 | |
| 1239 | /* Record the first bfd section that needs the special section */ |
| 1240 | if (!dynobj) |
| 1241 | dynobj = elf_hash_table (info)->dynobj = abfd; |
| 1242 | |
| 1243 | /* If this is the first time, create the section */ |
| 1244 | lsect = elf_linker_section (dynobj, which); |
| 1245 | if (!lsect) |
| 1246 | { |
| 1247 | elf_linker_section_t defaults; |
| 1248 | static elf_linker_section_t zero_section; |
| 1249 | |
| 1250 | defaults = zero_section; |
| 1251 | defaults.which = which; |
| 1252 | defaults.hole_written_p = false; |
| 1253 | defaults.alignment = 2; |
| 1254 | defaults.flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; |
| 1255 | |
| 1256 | switch (which) |
| 1257 | { |
| 1258 | default: |
| 1259 | (*_bfd_error_handler) ("%s: Unknown special linker type %d", |
| 1260 | bfd_get_filename (abfd), |
| 1261 | (int)which); |
| 1262 | |
| 1263 | bfd_set_error (bfd_error_bad_value); |
| 1264 | return (elf_linker_section_t *)0; |
| 1265 | |
| 1266 | case LINKER_SECTION_GOT: /* .got section */ |
| 1267 | defaults.name = ".got"; |
| 1268 | defaults.rel_name = ".rela.got"; |
| 1269 | defaults.sym_name = "_GLOBAL_OFFSET_TABLE_"; |
| 1270 | defaults.max_hole_offset = 32764; |
| 1271 | defaults.hole_size = 16; |
| 1272 | defaults.sym_offset = 4; |
| 1273 | break; |
| 1274 | |
| 1275 | case LINKER_SECTION_PLT: /* .plt section */ |
| 1276 | defaults.name = ".plt"; |
| 1277 | defaults.rel_name = ".rela.plt"; |
| 1278 | defaults.sym_name = (char *)0; |
| 1279 | defaults.max_hole_offset = 0; |
| 1280 | defaults.hole_size = 0; |
| 1281 | defaults.sym_offset = 0; |
| 1282 | defaults.flags &= ~SEC_LOAD; |
| 1283 | break; |
| 1284 | |
| 1285 | case LINKER_SECTION_SDATA: /* .sdata/.sbss section */ |
| 1286 | defaults.name = ".sdata"; |
| 1287 | defaults.rel_name = ".rela.sdata"; |
| 1288 | defaults.bss_name = ".sbss"; |
| 1289 | defaults.sym_name = "_SDA_BASE_"; |
| 1290 | defaults.sym_offset = 32768; |
| 1291 | break; |
| 1292 | |
| 1293 | case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */ |
| 1294 | defaults.name = ".sdata2"; |
| 1295 | defaults.rel_name = ".rela.sdata2"; |
| 1296 | defaults.bss_name = ".sbss2"; |
| 1297 | defaults.sym_name = "_SDA2_BASE_"; |
| 1298 | defaults.sym_offset = 32768; |
| 1299 | defaults.flags |= SEC_READONLY; |
| 1300 | break; |
| 1301 | } |
| 1302 | |
| 1303 | lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults); |
| 1304 | } |
| 1305 | |
| 1306 | return lsect; |
| 1307 | } |
| 1308 | |
| 1309 | \f |
| 1310 | /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we need to bump up |
| 1311 | the number of section headers. */ |
| 1312 | |
| 1313 | static int |
| 1314 | ppc_elf_additional_program_headers (abfd) |
| 1315 | bfd *abfd; |
| 1316 | { |
| 1317 | asection *s; |
| 1318 | int ret; |
| 1319 | |
| 1320 | ret = 0; |
| 1321 | |
| 1322 | s = bfd_get_section_by_name (abfd, ".interp"); |
| 1323 | if (s != NULL) |
| 1324 | ++ret; |
| 1325 | |
| 1326 | s = bfd_get_section_by_name (abfd, ".sbss2"); |
| 1327 | if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) |
| 1328 | ++ret; |
| 1329 | |
| 1330 | s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); |
| 1331 | if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) |
| 1332 | ++ret; |
| 1333 | |
| 1334 | return ret; |
| 1335 | } |
| 1336 | |
| 1337 | /* Modify the segment map if needed */ |
| 1338 | |
| 1339 | static boolean |
| 1340 | ppc_elf_modify_segment_map (abfd) |
| 1341 | bfd *abfd; |
| 1342 | { |
| 1343 | return true; |
| 1344 | } |
| 1345 | \f |
| 1346 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1347 | regular object. The current definition is in some section of the |
| 1348 | dynamic object, but we're not including those sections. We have to |
| 1349 | change the definition to something the rest of the link can |
| 1350 | understand. */ |
| 1351 | |
| 1352 | static boolean |
| 1353 | ppc_elf_adjust_dynamic_symbol (info, h) |
| 1354 | struct bfd_link_info *info; |
| 1355 | struct elf_link_hash_entry *h; |
| 1356 | { |
| 1357 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 1358 | asection *s; |
| 1359 | unsigned int power_of_two; |
| 1360 | bfd_vma plt_offset; |
| 1361 | |
| 1362 | #ifdef DEBUG |
| 1363 | fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", h->root.root.string); |
| 1364 | #endif |
| 1365 | |
| 1366 | /* Make sure we know what is going on here. */ |
| 1367 | BFD_ASSERT (dynobj != NULL |
| 1368 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| 1369 | || h->weakdef != NULL |
| 1370 | || ((h->elf_link_hash_flags |
| 1371 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 1372 | && (h->elf_link_hash_flags |
| 1373 | & ELF_LINK_HASH_REF_REGULAR) != 0 |
| 1374 | && (h->elf_link_hash_flags |
| 1375 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| 1376 | |
| 1377 | |
| 1378 | /* If this is a function, put it in the procedure linkage table. We |
| 1379 | will fill in the contents of the procedure linkage table later, |
| 1380 | when we know the address of the .got section. */ |
| 1381 | if (h->type == STT_FUNC |
| 1382 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 1383 | { |
| 1384 | if (! info->shared |
| 1385 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 |
| 1386 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0) |
| 1387 | { |
| 1388 | /* This case can occur if we saw a PLT32 reloc in an input |
| 1389 | file, but the symbol was never referred to by a dynamic |
| 1390 | object. In such a case, we don't actually need to build |
| 1391 | a procedure linkage table, and we can just do a PC32 |
| 1392 | reloc instead. */ |
| 1393 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); |
| 1394 | return true; |
| 1395 | } |
| 1396 | |
| 1397 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1398 | if (h->dynindx == -1) |
| 1399 | { |
| 1400 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 1401 | return false; |
| 1402 | } |
| 1403 | |
| 1404 | s = bfd_get_section_by_name (dynobj, ".plt"); |
| 1405 | BFD_ASSERT (s != NULL); |
| 1406 | |
| 1407 | /* If this is the first .plt entry, make room for the special |
| 1408 | first entry. */ |
| 1409 | if (s->_raw_size == 0) |
| 1410 | s->_raw_size += PLT_INITIAL_ENTRY_SIZE; |
| 1411 | |
| 1412 | /* The PowerPC PLT is actually composed of two parts, the first part |
| 1413 | is 2 words (for a load and a jump), and then there is a remaining |
| 1414 | word available at the end. */ |
| 1415 | plt_offset = (PLT_INITIAL_ENTRY_SIZE |
| 1416 | + 8 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE)); |
| 1417 | |
| 1418 | /* If this symbol is not defined in a regular file, and we are |
| 1419 | not generating a shared library, then set the symbol to this |
| 1420 | location in the .plt. This is required to make function |
| 1421 | pointers compare as equal between the normal executable and |
| 1422 | the shared library. */ |
| 1423 | if (! info->shared |
| 1424 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1425 | { |
| 1426 | h->root.u.def.section = s; |
| 1427 | h->root.u.def.value = plt_offset; |
| 1428 | } |
| 1429 | |
| 1430 | h->plt_offset = plt_offset; |
| 1431 | |
| 1432 | /* Make room for this entry. */ |
| 1433 | s->_raw_size += PLT_ENTRY_SIZE; |
| 1434 | |
| 1435 | /* We also need to make an entry in the .rela.plt section. */ |
| 1436 | |
| 1437 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 1438 | BFD_ASSERT (s != NULL); |
| 1439 | s->_raw_size += sizeof (Elf32_External_Rela); |
| 1440 | |
| 1441 | return true; |
| 1442 | } |
| 1443 | |
| 1444 | /* If this is a weak symbol, and there is a real definition, the |
| 1445 | processor independent code will have arranged for us to see the |
| 1446 | real definition first, and we can just use the same value. */ |
| 1447 | if (h->weakdef != NULL) |
| 1448 | { |
| 1449 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 1450 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 1451 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 1452 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 1453 | return true; |
| 1454 | } |
| 1455 | |
| 1456 | /* This is a reference to a symbol defined by a dynamic object which |
| 1457 | is not a function. */ |
| 1458 | |
| 1459 | /* If we are creating a shared library, we must presume that the |
| 1460 | only references to the symbol are via the global offset table. |
| 1461 | For such cases we need not do anything here; the relocations will |
| 1462 | be handled correctly by relocate_section. */ |
| 1463 | if (info->shared) |
| 1464 | return true; |
| 1465 | |
| 1466 | /* We must allocate the symbol in our .dynbss section, which will |
| 1467 | become part of the .bss section of the executable. There will be |
| 1468 | an entry for this symbol in the .dynsym section. The dynamic |
| 1469 | object will contain position independent code, so all references |
| 1470 | from the dynamic object to this symbol will go through the global |
| 1471 | offset table. The dynamic linker will use the .dynsym entry to |
| 1472 | determine the address it must put in the global offset table, so |
| 1473 | both the dynamic object and the regular object will refer to the |
| 1474 | same memory location for the variable. */ |
| 1475 | |
| 1476 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 1477 | BFD_ASSERT (s != NULL); |
| 1478 | |
| 1479 | /* If the symbol is currently defined in the .bss section of the |
| 1480 | dynamic object, then it is OK to simply initialize it to zero. |
| 1481 | If the symbol is in some other section, we must generate a |
| 1482 | R_386_COPY reloc to tell the dynamic linker to copy the initial |
| 1483 | value out of the dynamic object and into the runtime process |
| 1484 | image. We need to remember the offset into the .rela.bss section |
| 1485 | we are going to use. */ |
| 1486 | if ((h->root.u.def.section->flags & SEC_LOAD) != 0) |
| 1487 | { |
| 1488 | asection *srel; |
| 1489 | |
| 1490 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 1491 | BFD_ASSERT (srel != NULL); |
| 1492 | srel->_raw_size += sizeof (Elf32_External_Rel); |
| 1493 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 1494 | } |
| 1495 | |
| 1496 | /* We need to figure out the alignment required for this symbol. I |
| 1497 | have no idea how ELF linkers handle this. */ |
| 1498 | power_of_two = bfd_log2 (h->size); |
| 1499 | if (power_of_two > 3) |
| 1500 | power_of_two = 3; |
| 1501 | |
| 1502 | /* Apply the required alignment. */ |
| 1503 | s->_raw_size = BFD_ALIGN (s->_raw_size, |
| 1504 | (bfd_size_type) (1 << power_of_two)); |
| 1505 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 1506 | { |
| 1507 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 1508 | return false; |
| 1509 | } |
| 1510 | |
| 1511 | /* Define the symbol as being at this point in the section. */ |
| 1512 | h->root.u.def.section = s; |
| 1513 | h->root.u.def.value = s->_raw_size; |
| 1514 | |
| 1515 | /* Increment the section size to make room for the symbol. */ |
| 1516 | s->_raw_size += h->size; |
| 1517 | |
| 1518 | return true; |
| 1519 | } |
| 1520 | |
| 1521 | \f |
| 1522 | /* Increment the index of a dynamic symbol by a given amount. Called |
| 1523 | via elf_link_hash_traverse. */ |
| 1524 | |
| 1525 | static boolean |
| 1526 | ppc_elf_adjust_dynindx (h, cparg) |
| 1527 | struct elf_link_hash_entry *h; |
| 1528 | PTR cparg; |
| 1529 | { |
| 1530 | int *cp = (int *) cparg; |
| 1531 | |
| 1532 | #ifdef DEBUG |
| 1533 | fprintf (stderr, "ppc_elf_adjust_dynindx called, h->dynindx = %d, *cp = %d\n", h->dynindx, *cp); |
| 1534 | #endif |
| 1535 | |
| 1536 | if (h->dynindx != -1) |
| 1537 | h->dynindx += *cp; |
| 1538 | |
| 1539 | return true; |
| 1540 | } |
| 1541 | |
| 1542 | \f |
| 1543 | /* Set the sizes of the dynamic sections. */ |
| 1544 | |
| 1545 | static boolean |
| 1546 | ppc_elf_size_dynamic_sections (output_bfd, info) |
| 1547 | bfd *output_bfd; |
| 1548 | struct bfd_link_info *info; |
| 1549 | { |
| 1550 | bfd *dynobj; |
| 1551 | asection *s; |
| 1552 | boolean plt; |
| 1553 | boolean relocs; |
| 1554 | boolean reltext; |
| 1555 | |
| 1556 | #ifdef DEBUG |
| 1557 | fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); |
| 1558 | #endif |
| 1559 | |
| 1560 | dynobj = elf_hash_table (info)->dynobj; |
| 1561 | BFD_ASSERT (dynobj != NULL); |
| 1562 | |
| 1563 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1564 | { |
| 1565 | /* Set the contents of the .interp section to the interpreter. */ |
| 1566 | if (! info->shared) |
| 1567 | { |
| 1568 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 1569 | BFD_ASSERT (s != NULL); |
| 1570 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 1571 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 1572 | } |
| 1573 | |
| 1574 | /* Make space for the trailing nop in .plt. */ |
| 1575 | s = bfd_get_section_by_name (dynobj, ".plt"); |
| 1576 | BFD_ASSERT (s != NULL); |
| 1577 | if (s->_raw_size > 0) |
| 1578 | s->_raw_size += 4; |
| 1579 | } |
| 1580 | else |
| 1581 | { |
| 1582 | /* We may have created entries in the .rela.got, .rela.sdata, and |
| 1583 | .rela.sdata2 section2. However, if we are not creating the |
| 1584 | dynamic sections, we will not actually use these entries. Reset |
| 1585 | the size of .rela.got, et al, which will cause it to get |
| 1586 | stripped from the output file below. */ |
| 1587 | static char *rela_sections[] = { ".rela.got", ".rela.sdata", ".rela.sdata", (char *)0 }; |
| 1588 | char **p; |
| 1589 | |
| 1590 | for (p = rela_sections; *p != (char *)0; p++) |
| 1591 | { |
| 1592 | s = bfd_get_section_by_name (dynobj, *p); |
| 1593 | if (s != NULL) |
| 1594 | s->_raw_size = 0; |
| 1595 | } |
| 1596 | } |
| 1597 | |
| 1598 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 1599 | determined the sizes of the various dynamic sections. Allocate |
| 1600 | memory for them. */ |
| 1601 | plt = false; |
| 1602 | relocs = false; |
| 1603 | reltext = false; |
| 1604 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 1605 | { |
| 1606 | const char *name; |
| 1607 | boolean strip; |
| 1608 | |
| 1609 | if ((s->flags & SEC_IN_MEMORY) == 0) |
| 1610 | continue; |
| 1611 | |
| 1612 | /* It's OK to base decisions on the section name, because none |
| 1613 | of the dynobj section names depend upon the input files. */ |
| 1614 | name = bfd_get_section_name (dynobj, s); |
| 1615 | |
| 1616 | strip = false; |
| 1617 | |
| 1618 | if (strcmp (name, ".plt") == 0) |
| 1619 | { |
| 1620 | if (s->_raw_size == 0) |
| 1621 | { |
| 1622 | /* Strip this section if we don't need it; see the |
| 1623 | comment below. */ |
| 1624 | strip = true; |
| 1625 | } |
| 1626 | else |
| 1627 | { |
| 1628 | /* Remember whether there is a PLT. */ |
| 1629 | plt = true; |
| 1630 | } |
| 1631 | } |
| 1632 | else if (strncmp (name, ".rela", 5) == 0) |
| 1633 | { |
| 1634 | if (s->_raw_size == 0) |
| 1635 | { |
| 1636 | /* If we don't need this section, strip it from the |
| 1637 | output file. This is mostly to handle .rela.bss and |
| 1638 | .rela.plt. We must create both sections in |
| 1639 | create_dynamic_sections, because they must be created |
| 1640 | before the linker maps input sections to output |
| 1641 | sections. The linker does that before |
| 1642 | adjust_dynamic_symbol is called, and it is that |
| 1643 | function which decides whether anything needs to go |
| 1644 | into these sections. */ |
| 1645 | strip = true; |
| 1646 | } |
| 1647 | else |
| 1648 | { |
| 1649 | asection *target; |
| 1650 | |
| 1651 | /* Remember whether there are any reloc sections other |
| 1652 | than .rel.plt. */ |
| 1653 | if (strcmp (name, ".rela.plt") != 0) |
| 1654 | { |
| 1655 | relocs = true; |
| 1656 | |
| 1657 | /* If this relocation section applies to a read only |
| 1658 | section, then we probably need a DT_TEXTREL |
| 1659 | entry. The entries in the .rel.plt section |
| 1660 | really apply to the .got section, which we |
| 1661 | created ourselves and so know is not readonly. */ |
| 1662 | target = bfd_get_section_by_name (output_bfd, name + 4); |
| 1663 | if (target != NULL |
| 1664 | && (target->flags & SEC_READONLY) != 0) |
| 1665 | reltext = true; |
| 1666 | } |
| 1667 | |
| 1668 | /* We use the reloc_count field as a counter if we need |
| 1669 | to copy relocs into the output file. */ |
| 1670 | s->reloc_count = 0; |
| 1671 | } |
| 1672 | } |
| 1673 | else if (strcmp (name, ".got") != 0 |
| 1674 | && strcmp (name, ".sdata") != 0 |
| 1675 | && strcmp (name, ".sdata2") != 0) |
| 1676 | { |
| 1677 | /* It's not one of our sections, so don't allocate space. */ |
| 1678 | continue; |
| 1679 | } |
| 1680 | |
| 1681 | if (strip) |
| 1682 | { |
| 1683 | asection **spp; |
| 1684 | |
| 1685 | for (spp = &s->output_section->owner->sections; |
| 1686 | *spp != s->output_section; |
| 1687 | spp = &(*spp)->next) |
| 1688 | ; |
| 1689 | *spp = s->output_section->next; |
| 1690 | --s->output_section->owner->section_count; |
| 1691 | |
| 1692 | continue; |
| 1693 | } |
| 1694 | |
| 1695 | /* Allocate memory for the section contents. */ |
| 1696 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| 1697 | if (s->contents == NULL && s->_raw_size != 0) |
| 1698 | return false; |
| 1699 | } |
| 1700 | |
| 1701 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1702 | { |
| 1703 | /* Add some entries to the .dynamic section. We fill in the |
| 1704 | values later, in ppc_elf_finish_dynamic_sections, but we |
| 1705 | must add the entries now so that we get the correct size for |
| 1706 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 1707 | dynamic linker and used by the debugger. */ |
| 1708 | if (! info->shared) |
| 1709 | { |
| 1710 | if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) |
| 1711 | return false; |
| 1712 | } |
| 1713 | |
| 1714 | if (plt) |
| 1715 | { |
| 1716 | if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) |
| 1717 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| 1718 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_REL) |
| 1719 | || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) |
| 1720 | return false; |
| 1721 | } |
| 1722 | |
| 1723 | if (relocs) |
| 1724 | { |
| 1725 | if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0) |
| 1726 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, DT_RELA) |
| 1727 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT, |
| 1728 | sizeof (Elf32_External_Rela))) |
| 1729 | return false; |
| 1730 | } |
| 1731 | |
| 1732 | if (reltext) |
| 1733 | { |
| 1734 | if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) |
| 1735 | return false; |
| 1736 | } |
| 1737 | } |
| 1738 | |
| 1739 | /* If we are generating a shared library, we generate a section |
| 1740 | symbol for each output section. These are local symbols, which |
| 1741 | means that they must come first in the dynamic symbol table. |
| 1742 | That means we must increment the dynamic symbol index of every |
| 1743 | other dynamic symbol. */ |
| 1744 | if (info->shared) |
| 1745 | { |
| 1746 | int c, i; |
| 1747 | |
| 1748 | c = bfd_count_sections (output_bfd); |
| 1749 | elf_link_hash_traverse (elf_hash_table (info), |
| 1750 | ppc_elf_adjust_dynindx, |
| 1751 | (PTR) &c); |
| 1752 | elf_hash_table (info)->dynsymcount += c; |
| 1753 | |
| 1754 | for (i = 1, s = output_bfd->sections; s != NULL; s = s->next, i++) |
| 1755 | { |
| 1756 | elf_section_data (s)->dynindx = i; |
| 1757 | /* These symbols will have no names, so we don't need to |
| 1758 | fiddle with dynstr_index. */ |
| 1759 | } |
| 1760 | } |
| 1761 | |
| 1762 | return true; |
| 1763 | } |
| 1764 | |
| 1765 | \f |
| 1766 | /* Look through the relocs for a section during the first phase, and |
| 1767 | allocate space in the global offset table or procedure linkage |
| 1768 | table. */ |
| 1769 | |
| 1770 | static boolean |
| 1771 | ppc_elf_check_relocs (abfd, info, sec, relocs) |
| 1772 | bfd *abfd; |
| 1773 | struct bfd_link_info *info; |
| 1774 | asection *sec; |
| 1775 | const Elf_Internal_Rela *relocs; |
| 1776 | { |
| 1777 | boolean ret = true; |
| 1778 | bfd *dynobj; |
| 1779 | Elf_Internal_Shdr *symtab_hdr; |
| 1780 | struct elf_link_hash_entry **sym_hashes; |
| 1781 | const Elf_Internal_Rela *rel; |
| 1782 | const Elf_Internal_Rela *rel_end; |
| 1783 | elf_linker_section_t *got; |
| 1784 | elf_linker_section_t *plt; |
| 1785 | elf_linker_section_t *sdata; |
| 1786 | elf_linker_section_t *sdata2; |
| 1787 | asection *sreloc; |
| 1788 | |
| 1789 | if (info->relocateable) |
| 1790 | return true; |
| 1791 | |
| 1792 | #ifdef DEBUG |
| 1793 | fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n", |
| 1794 | bfd_get_section_name (abfd, sec), |
| 1795 | bfd_get_filename (abfd)); |
| 1796 | #endif |
| 1797 | |
| 1798 | /* Create the linker generated sections all the time so that the special |
| 1799 | symbols are created. */ |
| 1800 | if ((got = elf_linker_section (abfd, LINKER_SECTION_GOT)) == NULL) |
| 1801 | { |
| 1802 | got = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_GOT); |
| 1803 | if (!got) |
| 1804 | ret = false; |
| 1805 | } |
| 1806 | |
| 1807 | #if 0 |
| 1808 | if ((plt = elf_linker_section (abfd, LINKER_SECTION_PLT)) == NULL) |
| 1809 | { |
| 1810 | plt = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_PLT); |
| 1811 | if (!plt) |
| 1812 | ret = false; |
| 1813 | } |
| 1814 | #endif |
| 1815 | |
| 1816 | if ((sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA)) == NULL) |
| 1817 | { |
| 1818 | sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA); |
| 1819 | if (!sdata) |
| 1820 | ret = false; |
| 1821 | } |
| 1822 | |
| 1823 | |
| 1824 | if ((sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2)) == NULL) |
| 1825 | { |
| 1826 | sdata2 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA2); |
| 1827 | if (!sdata2) |
| 1828 | ret = false; |
| 1829 | } |
| 1830 | |
| 1831 | dynobj = elf_hash_table (info)->dynobj; |
| 1832 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1833 | sym_hashes = elf_sym_hashes (abfd); |
| 1834 | |
| 1835 | sreloc = NULL; |
| 1836 | |
| 1837 | rel_end = relocs + sec->reloc_count; |
| 1838 | for (rel = relocs; rel < rel_end; rel++) |
| 1839 | { |
| 1840 | unsigned long r_symndx; |
| 1841 | struct elf_link_hash_entry *h; |
| 1842 | |
| 1843 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1844 | if (r_symndx < symtab_hdr->sh_info) |
| 1845 | h = NULL; |
| 1846 | else |
| 1847 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1848 | |
| 1849 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1850 | { |
| 1851 | /* GOT16 relocations */ |
| 1852 | case R_PPC_GOT16: |
| 1853 | case R_PPC_GOT16_LO: |
| 1854 | case R_PPC_GOT16_HI: |
| 1855 | case R_PPC_GOT16_HA: |
| 1856 | if (got->rel_section == NULL |
| 1857 | && (h != NULL || info->shared) |
| 1858 | && !_bfd_elf_make_linker_section_rela (dynobj, got, 2)) |
| 1859 | { |
| 1860 | ret = false; |
| 1861 | break; |
| 1862 | } |
| 1863 | |
| 1864 | if (!bfd_elf32_create_pointer_linker_section (abfd, info, got, h, rel)) |
| 1865 | ret = false; |
| 1866 | |
| 1867 | break; |
| 1868 | |
| 1869 | /* Indirect .sdata relocation */ |
| 1870 | case R_PPC_EMB_SDAI16: |
| 1871 | if (info->shared) |
| 1872 | { |
| 1873 | (*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object", |
| 1874 | bfd_get_filename (abfd), |
| 1875 | "R_PPC_EMB_SDAI16"); |
| 1876 | ret = false; |
| 1877 | break; |
| 1878 | } |
| 1879 | |
| 1880 | if (got->rel_section == NULL |
| 1881 | && (h != NULL || info->shared) |
| 1882 | && !_bfd_elf_make_linker_section_rela (dynobj, got, 2)) |
| 1883 | { |
| 1884 | ret = false; |
| 1885 | break; |
| 1886 | } |
| 1887 | |
| 1888 | if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata, h, rel)) |
| 1889 | ret = false; |
| 1890 | |
| 1891 | break; |
| 1892 | |
| 1893 | /* Indirect .sdata2 relocation */ |
| 1894 | case R_PPC_EMB_SDA2I16: |
| 1895 | if (info->shared) |
| 1896 | { |
| 1897 | (*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object", |
| 1898 | bfd_get_filename (abfd), |
| 1899 | "R_PPC_EMB_SDA2I16"); |
| 1900 | ret = false; |
| 1901 | break; |
| 1902 | } |
| 1903 | |
| 1904 | if (got->rel_section == NULL |
| 1905 | && (h != NULL || info->shared) |
| 1906 | && !_bfd_elf_make_linker_section_rela (dynobj, got, 2)) |
| 1907 | return false; |
| 1908 | |
| 1909 | if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata2, h, rel)) |
| 1910 | return false; |
| 1911 | |
| 1912 | break; |
| 1913 | |
| 1914 | case R_PPC_SDAREL16: |
| 1915 | case R_PPC_EMB_SDA2REL: |
| 1916 | case R_PPC_EMB_SDA21: |
| 1917 | if (info->shared) |
| 1918 | { |
| 1919 | (*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object", |
| 1920 | bfd_get_filename (abfd), |
| 1921 | ppc_elf_howto_table[(int)ELF32_R_TYPE (rel->r_info)]->name); |
| 1922 | ret = false; |
| 1923 | } |
| 1924 | break; |
| 1925 | |
| 1926 | case R_PPC_PLT32: |
| 1927 | case R_PPC_PLTREL24: |
| 1928 | case R_PPC_PLT16_LO: |
| 1929 | case R_PPC_PLT16_HI: |
| 1930 | case R_PPC_PLT16_HA: |
| 1931 | #ifdef DEBUG |
| 1932 | fprintf (stderr, "Reloc requires a PLT entry\n"); |
| 1933 | #endif |
| 1934 | /* This symbol requires a procedure linkage table entry. We |
| 1935 | actually build the entry in adjust_dynamic_symbol, |
| 1936 | because this might be a case of linking PIC code without |
| 1937 | linking in any dynamic objects, in which case we don't |
| 1938 | need to generate a procedure linkage table after all. */ |
| 1939 | |
| 1940 | if (h == NULL) |
| 1941 | { |
| 1942 | /* It does not make sense to have a procedure linkage |
| 1943 | table entry for a local symbol. */ |
| 1944 | bfd_set_error (bfd_error_bad_value); |
| 1945 | ret = false; |
| 1946 | break; |
| 1947 | } |
| 1948 | |
| 1949 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1950 | if (h->dynindx == -1) |
| 1951 | { |
| 1952 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 1953 | { |
| 1954 | ret = false; |
| 1955 | break; |
| 1956 | } |
| 1957 | } |
| 1958 | |
| 1959 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 1960 | break; |
| 1961 | |
| 1962 | /* the following relocations don't need to propigate the relocation if |
| 1963 | linking a shared object since they are section relative. */ |
| 1964 | case R_PPC_SECTOFF: |
| 1965 | case R_PPC_SECTOFF_LO: |
| 1966 | case R_PPC_SECTOFF_HI: |
| 1967 | case R_PPC_SECTOFF_HA: |
| 1968 | break; |
| 1969 | |
| 1970 | /* When creating a shared object, we must copy these |
| 1971 | relocs into the output file. We create a reloc |
| 1972 | section in dynobj and make room for the reloc. */ |
| 1973 | case R_PPC_REL24: |
| 1974 | if (h != NULL |
| 1975 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 1976 | break; |
| 1977 | /* fall through */ |
| 1978 | |
| 1979 | case R_PPC_REL14: |
| 1980 | case R_PPC_REL14_BRTAKEN: |
| 1981 | case R_PPC_REL14_BRNTAKEN: |
| 1982 | if (h == NULL) |
| 1983 | break; |
| 1984 | /* fall through */ |
| 1985 | |
| 1986 | default: |
| 1987 | if (info->shared |
| 1988 | && (sec->flags & SEC_ALLOC) != 0) |
| 1989 | { |
| 1990 | if (sreloc == NULL) |
| 1991 | { |
| 1992 | const char *name; |
| 1993 | |
| 1994 | name = (bfd_elf_string_from_elf_section |
| 1995 | (abfd, |
| 1996 | elf_elfheader (abfd)->e_shstrndx, |
| 1997 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 1998 | if (name == NULL) |
| 1999 | { |
| 2000 | ret = false; |
| 2001 | break; |
| 2002 | } |
| 2003 | |
| 2004 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 2005 | && strcmp (bfd_get_section_name (abfd, sec), |
| 2006 | name + 5) == 0); |
| 2007 | |
| 2008 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 2009 | if (sreloc == NULL) |
| 2010 | { |
| 2011 | sreloc = bfd_make_section (dynobj, name); |
| 2012 | if (sreloc == NULL |
| 2013 | || ! bfd_set_section_flags (dynobj, sreloc, |
| 2014 | (SEC_ALLOC |
| 2015 | | SEC_LOAD |
| 2016 | | SEC_HAS_CONTENTS |
| 2017 | | SEC_IN_MEMORY |
| 2018 | | SEC_READONLY)) |
| 2019 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) |
| 2020 | { |
| 2021 | ret = false; |
| 2022 | break; |
| 2023 | } |
| 2024 | } |
| 2025 | } |
| 2026 | |
| 2027 | sreloc->_raw_size += sizeof (Elf32_External_Rela); |
| 2028 | } |
| 2029 | |
| 2030 | break; |
| 2031 | } |
| 2032 | } |
| 2033 | |
| 2034 | return ret; |
| 2035 | } |
| 2036 | |
| 2037 | \f |
| 2038 | /* Hook called by the linker routine which adds symbols from an object |
| 2039 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 2040 | |
| 2041 | /*ARGSUSED*/ |
| 2042 | static boolean |
| 2043 | ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| 2044 | bfd *abfd; |
| 2045 | struct bfd_link_info *info; |
| 2046 | const Elf_Internal_Sym *sym; |
| 2047 | const char **namep; |
| 2048 | flagword *flagsp; |
| 2049 | asection **secp; |
| 2050 | bfd_vma *valp; |
| 2051 | { |
| 2052 | if (sym->st_shndx == SHN_COMMON && !info->relocateable && sym->st_size <= bfd_get_gp_size (abfd)) |
| 2053 | { |
| 2054 | /* Common symbols less than or equal to -G nn bytes are automatically |
| 2055 | put into .sdata. */ |
| 2056 | elf_linker_section_t *sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA); |
| 2057 | if (!sdata->bss_section) |
| 2058 | { |
| 2059 | sdata->bss_section = bfd_make_section (elf_hash_table (info)->dynobj, sdata->bss_name); |
| 2060 | sdata->bss_section->flags = (sdata->bss_section->flags & ~SEC_LOAD) | SEC_IS_COMMON; |
| 2061 | } |
| 2062 | |
| 2063 | *secp = sdata->bss_section; |
| 2064 | *valp = sym->st_size; |
| 2065 | } |
| 2066 | |
| 2067 | return true; |
| 2068 | } |
| 2069 | |
| 2070 | \f |
| 2071 | /* Finish up dynamic symbol handling. We set the contents of various |
| 2072 | dynamic sections here. */ |
| 2073 | |
| 2074 | static boolean |
| 2075 | ppc_elf_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 2076 | bfd *output_bfd; |
| 2077 | struct bfd_link_info *info; |
| 2078 | struct elf_link_hash_entry *h; |
| 2079 | Elf_Internal_Sym *sym; |
| 2080 | { |
| 2081 | bfd *dynobj; |
| 2082 | |
| 2083 | #ifdef DEBUG |
| 2084 | fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", h->root.root.string); |
| 2085 | #endif |
| 2086 | |
| 2087 | dynobj = elf_hash_table (info)->dynobj; |
| 2088 | BFD_ASSERT (dynobj != NULL); |
| 2089 | |
| 2090 | if (h->plt_offset != (bfd_vma) -1) |
| 2091 | { |
| 2092 | asection *splt; |
| 2093 | asection *srela; |
| 2094 | Elf_Internal_Rela rela; |
| 2095 | |
| 2096 | #ifdef DEBUG |
| 2097 | fprintf (stderr, ", plt_offset = %d", h->plt_offset); |
| 2098 | #endif |
| 2099 | |
| 2100 | /* This symbol has an entry in the procedure linkage table. Set |
| 2101 | it up. */ |
| 2102 | |
| 2103 | BFD_ASSERT (h->dynindx != -1); |
| 2104 | |
| 2105 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2106 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 2107 | BFD_ASSERT (splt != NULL && srela != NULL); |
| 2108 | |
| 2109 | /* We don't need to fill in the .plt. The solaris dynamic linker will |
| 2110 | fill it in. */ |
| 2111 | |
| 2112 | /* Fill in the entry in the .rela.plt section. */ |
| 2113 | rela.r_offset = (splt->output_section->vma |
| 2114 | + splt->output_offset |
| 2115 | + h->plt_offset); |
| 2116 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); |
| 2117 | rela.r_addend = 0; |
| 2118 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 2119 | ((Elf32_External_Rela *) srela->contents |
| 2120 | + ((h->plt_offset - PLT_INITIAL_ENTRY_SIZE) / 8))); |
| 2121 | |
| 2122 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 2123 | { |
| 2124 | /* Mark the symbol as undefined, rather than as defined in |
| 2125 | the .plt section. Leave the value alone. */ |
| 2126 | sym->st_shndx = SHN_UNDEF; |
| 2127 | } |
| 2128 | } |
| 2129 | |
| 2130 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 2131 | { |
| 2132 | asection *s; |
| 2133 | Elf_Internal_Rela rela; |
| 2134 | |
| 2135 | /* This symbols needs a copy reloc. Set it up. */ |
| 2136 | |
| 2137 | #ifdef DEBUG |
| 2138 | fprintf (stderr, ", copy"); |
| 2139 | #endif |
| 2140 | |
| 2141 | BFD_ASSERT (h->dynindx != -1); |
| 2142 | |
| 2143 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 2144 | ".rela.bss"); |
| 2145 | BFD_ASSERT (s != NULL); |
| 2146 | |
| 2147 | rela.r_offset = (h->root.u.def.value |
| 2148 | + h->root.u.def.section->output_section->vma |
| 2149 | + h->root.u.def.section->output_offset); |
| 2150 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); |
| 2151 | rela.r_addend = 0; |
| 2152 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 2153 | ((Elf32_External_Rela *) s->contents |
| 2154 | + s->reloc_count)); |
| 2155 | ++s->reloc_count; |
| 2156 | } |
| 2157 | |
| 2158 | #ifdef DEBUG |
| 2159 | fprintf (stderr, "\n"); |
| 2160 | #endif |
| 2161 | |
| 2162 | /* Mark some specially defined symbols as absolute. */ |
| 2163 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 2164 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| 2165 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| 2166 | sym->st_shndx = SHN_ABS; |
| 2167 | |
| 2168 | return true; |
| 2169 | } |
| 2170 | |
| 2171 | \f |
| 2172 | /* Finish up the dynamic sections. */ |
| 2173 | |
| 2174 | static boolean |
| 2175 | ppc_elf_finish_dynamic_sections (output_bfd, info) |
| 2176 | bfd *output_bfd; |
| 2177 | struct bfd_link_info *info; |
| 2178 | { |
| 2179 | asection *sdyn; |
| 2180 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 2181 | elf_linker_section_t *got = elf_linker_section (dynobj, LINKER_SECTION_GOT); |
| 2182 | |
| 2183 | #ifdef DEBUG |
| 2184 | fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); |
| 2185 | #endif |
| 2186 | |
| 2187 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 2188 | |
| 2189 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2190 | { |
| 2191 | asection *splt; |
| 2192 | Elf32_External_Dyn *dyncon, *dynconend; |
| 2193 | |
| 2194 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2195 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 2196 | |
| 2197 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 2198 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 2199 | for (; dyncon < dynconend; dyncon++) |
| 2200 | { |
| 2201 | Elf_Internal_Dyn dyn; |
| 2202 | const char *name; |
| 2203 | boolean size; |
| 2204 | |
| 2205 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 2206 | |
| 2207 | switch (dyn.d_tag) |
| 2208 | { |
| 2209 | case DT_PLTGOT: name = ".plt"; size = false; break; |
| 2210 | case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; |
| 2211 | case DT_JMPREL: name = ".rela.plt"; size = false; break; |
| 2212 | default: name = NULL; size = false; break; |
| 2213 | } |
| 2214 | |
| 2215 | if (name != NULL) |
| 2216 | { |
| 2217 | asection *s; |
| 2218 | |
| 2219 | s = bfd_get_section_by_name (output_bfd, name); |
| 2220 | if (s == NULL) |
| 2221 | dyn.d_un.d_val = 0; |
| 2222 | else |
| 2223 | { |
| 2224 | if (! size) |
| 2225 | dyn.d_un.d_ptr = s->vma; |
| 2226 | else |
| 2227 | { |
| 2228 | if (s->_cooked_size != 0) |
| 2229 | dyn.d_un.d_val = s->_cooked_size; |
| 2230 | else |
| 2231 | dyn.d_un.d_val = s->_raw_size; |
| 2232 | } |
| 2233 | } |
| 2234 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2235 | } |
| 2236 | } |
| 2237 | } |
| 2238 | |
| 2239 | /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can |
| 2240 | easily find the address of the _GLOBAL_OFFSET_TABLE_. */ |
| 2241 | if (got) |
| 2242 | { |
| 2243 | unsigned char *contents = got->section->contents + got->hole_offset; |
| 2244 | bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents); |
| 2245 | |
| 2246 | if (sdyn == NULL) |
| 2247 | bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4); |
| 2248 | else |
| 2249 | bfd_put_32 (output_bfd, |
| 2250 | sdyn->output_section->vma + sdyn->output_offset, |
| 2251 | contents+4); |
| 2252 | |
| 2253 | elf_section_data (got->section->output_section)->this_hdr.sh_entsize = 4; |
| 2254 | } |
| 2255 | |
| 2256 | if (info->shared) |
| 2257 | { |
| 2258 | asection *sdynsym; |
| 2259 | asection *s; |
| 2260 | Elf_Internal_Sym sym; |
| 2261 | |
| 2262 | /* Set up the section symbols for the output sections. */ |
| 2263 | |
| 2264 | sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); |
| 2265 | BFD_ASSERT (sdynsym != NULL); |
| 2266 | |
| 2267 | sym.st_size = 0; |
| 2268 | sym.st_name = 0; |
| 2269 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); |
| 2270 | sym.st_other = 0; |
| 2271 | |
| 2272 | for (s = output_bfd->sections; s != NULL; s = s->next) |
| 2273 | { |
| 2274 | int indx; |
| 2275 | |
| 2276 | sym.st_value = s->vma; |
| 2277 | |
| 2278 | indx = elf_section_data (s)->this_idx; |
| 2279 | BFD_ASSERT (indx > 0); |
| 2280 | sym.st_shndx = indx; |
| 2281 | |
| 2282 | bfd_elf32_swap_symbol_out (output_bfd, &sym, |
| 2283 | (PTR) (((Elf32_External_Sym *) |
| 2284 | sdynsym->contents) |
| 2285 | + elf_section_data (s)->dynindx)); |
| 2286 | } |
| 2287 | |
| 2288 | /* Set the sh_info field of the output .dynsym section to the |
| 2289 | index of the first global symbol. */ |
| 2290 | elf_section_data (sdynsym->output_section)->this_hdr.sh_info = |
| 2291 | bfd_count_sections (output_bfd) + 1; |
| 2292 | } |
| 2293 | |
| 2294 | return true; |
| 2295 | } |
| 2296 | |
| 2297 | \f |
| 2298 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 2299 | to handle the relocations for a section. |
| 2300 | |
| 2301 | The relocs are always passed as Rela structures; if the section |
| 2302 | actually uses Rel structures, the r_addend field will always be |
| 2303 | zero. |
| 2304 | |
| 2305 | This function is responsible for adjust the section contents as |
| 2306 | necessary, and (if using Rela relocs and generating a |
| 2307 | relocateable output file) adjusting the reloc addend as |
| 2308 | necessary. |
| 2309 | |
| 2310 | This function does not have to worry about setting the reloc |
| 2311 | address or the reloc symbol index. |
| 2312 | |
| 2313 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 2314 | |
| 2315 | LOCAL_SECTIONS is an array giving the section in the input file |
| 2316 | corresponding to the st_shndx field of each local symbol. |
| 2317 | |
| 2318 | The global hash table entry for the global symbols can be found |
| 2319 | via elf_sym_hashes (input_bfd). |
| 2320 | |
| 2321 | When generating relocateable output, this function must handle |
| 2322 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 2323 | going to be the section symbol corresponding to the output |
| 2324 | section, which means that the addend must be adjusted |
| 2325 | accordingly. */ |
| 2326 | |
| 2327 | static boolean |
| 2328 | ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| 2329 | contents, relocs, local_syms, local_sections) |
| 2330 | bfd *output_bfd; |
| 2331 | struct bfd_link_info *info; |
| 2332 | bfd *input_bfd; |
| 2333 | asection *input_section; |
| 2334 | bfd_byte *contents; |
| 2335 | Elf_Internal_Rela *relocs; |
| 2336 | Elf_Internal_Sym *local_syms; |
| 2337 | asection **local_sections; |
| 2338 | { |
| 2339 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2340 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| 2341 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 2342 | elf_linker_section_t *got = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_GOT) : NULL; |
| 2343 | elf_linker_section_t *sdata = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA) : NULL; |
| 2344 | elf_linker_section_t *sdata2 = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA2) : NULL; |
| 2345 | Elf_Internal_Rela *rel = relocs; |
| 2346 | Elf_Internal_Rela *relend = relocs + input_section->reloc_count; |
| 2347 | boolean ret = true; |
| 2348 | long insn; |
| 2349 | |
| 2350 | #ifdef DEBUG |
| 2351 | fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n", |
| 2352 | bfd_get_filename (input_bfd), |
| 2353 | bfd_section_name(input_bfd, input_section), |
| 2354 | (long)input_section->reloc_count, |
| 2355 | (info->relocateable) ? " (relocatable)" : ""); |
| 2356 | #endif |
| 2357 | |
| 2358 | if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */ |
| 2359 | ppc_elf_howto_init (); |
| 2360 | |
| 2361 | for (; rel < relend; rel++) |
| 2362 | { |
| 2363 | enum ppc_reloc_type r_type = (enum ppc_reloc_type)ELF32_R_TYPE (rel->r_info); |
| 2364 | bfd_vma offset = rel->r_offset; |
| 2365 | bfd_vma addend = rel->r_addend; |
| 2366 | bfd_reloc_status_type r = bfd_reloc_other; |
| 2367 | Elf_Internal_Sym *sym = (Elf_Internal_Sym *)0; |
| 2368 | asection *sec = (asection *)0; |
| 2369 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *)0; |
| 2370 | const char *sym_name = (const char *)0; |
| 2371 | reloc_howto_type *howto; |
| 2372 | unsigned long r_symndx; |
| 2373 | bfd_vma relocation; |
| 2374 | |
| 2375 | /* Unknown relocation handling */ |
| 2376 | if ((unsigned)r_type >= (unsigned)R_PPC_max || !ppc_elf_howto_table[(int)r_type]) |
| 2377 | { |
| 2378 | (*_bfd_error_handler) ("%s: unknown relocation type %d", |
| 2379 | bfd_get_filename (input_bfd), |
| 2380 | (int)r_type); |
| 2381 | |
| 2382 | bfd_set_error (bfd_error_bad_value); |
| 2383 | ret = false; |
| 2384 | continue; |
| 2385 | } |
| 2386 | |
| 2387 | howto = ppc_elf_howto_table[(int)r_type]; |
| 2388 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2389 | |
| 2390 | if (info->relocateable) |
| 2391 | { |
| 2392 | /* This is a relocateable link. We don't have to change |
| 2393 | anything, unless the reloc is against a section symbol, |
| 2394 | in which case we have to adjust according to where the |
| 2395 | section symbol winds up in the output section. */ |
| 2396 | if (r_symndx < symtab_hdr->sh_info) |
| 2397 | { |
| 2398 | sym = local_syms + r_symndx; |
| 2399 | if ((unsigned)ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 2400 | { |
| 2401 | sec = local_sections[r_symndx]; |
| 2402 | addend = rel->r_addend += sec->output_offset + sym->st_value; |
| 2403 | } |
| 2404 | } |
| 2405 | |
| 2406 | #ifdef DEBUG |
| 2407 | fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n", |
| 2408 | howto->name, |
| 2409 | (int)r_type, |
| 2410 | r_symndx, |
| 2411 | (long)offset, |
| 2412 | (long)addend); |
| 2413 | #endif |
| 2414 | continue; |
| 2415 | } |
| 2416 | |
| 2417 | /* This is a final link. */ |
| 2418 | if (r_symndx < symtab_hdr->sh_info) |
| 2419 | { |
| 2420 | sym = local_syms + r_symndx; |
| 2421 | sec = local_sections[r_symndx]; |
| 2422 | sym_name = "<local symbol>"; |
| 2423 | |
| 2424 | relocation = (sec->output_section->vma |
| 2425 | + sec->output_offset |
| 2426 | + sym->st_value); |
| 2427 | } |
| 2428 | else |
| 2429 | { |
| 2430 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2431 | while (h->root.type == bfd_link_hash_indirect |
| 2432 | || h->root.type == bfd_link_hash_warning) |
| 2433 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2434 | sym_name = h->root.root.string; |
| 2435 | if (h->root.type == bfd_link_hash_defined |
| 2436 | || h->root.type == bfd_link_hash_defweak) |
| 2437 | { |
| 2438 | sec = h->root.u.def.section; |
| 2439 | if (!sec || !sec->output_section) |
| 2440 | { |
| 2441 | (*_bfd_error_handler) ("%s: Section in shared library for symbol %s\n", |
| 2442 | bfd_get_filename (input_bfd), |
| 2443 | sym_name); |
| 2444 | relocation = 0; |
| 2445 | } |
| 2446 | else |
| 2447 | relocation = (h->root.u.def.value |
| 2448 | + sec->output_section->vma |
| 2449 | + sec->output_offset); |
| 2450 | } |
| 2451 | else if (h->root.type == bfd_link_hash_undefweak) |
| 2452 | relocation = 0; |
| 2453 | else if (info->shared) |
| 2454 | relocation = 0; |
| 2455 | else |
| 2456 | { |
| 2457 | (*info->callbacks->undefined_symbol)(info, |
| 2458 | h->root.root.string, |
| 2459 | input_bfd, |
| 2460 | input_section, |
| 2461 | rel->r_offset); |
| 2462 | ret = false; |
| 2463 | continue; |
| 2464 | } |
| 2465 | } |
| 2466 | |
| 2467 | switch ((int)r_type) |
| 2468 | { |
| 2469 | default: |
| 2470 | (*_bfd_error_handler) ("%s: unknown relocation type %d for symbol %s", |
| 2471 | bfd_get_filename (input_bfd), |
| 2472 | (int)r_type, sym_name); |
| 2473 | |
| 2474 | bfd_set_error (bfd_error_bad_value); |
| 2475 | ret = false; |
| 2476 | continue; |
| 2477 | |
| 2478 | /* relocations that need no special processing */ |
| 2479 | case (int)R_PPC_NONE: |
| 2480 | case (int)R_PPC_ADDR32: |
| 2481 | case (int)R_PPC_ADDR24: |
| 2482 | case (int)R_PPC_ADDR16: |
| 2483 | case (int)R_PPC_ADDR16_LO: |
| 2484 | case (int)R_PPC_ADDR16_HI: |
| 2485 | case (int)R_PPC_ADDR14: |
| 2486 | case (int)R_PPC_REL24: |
| 2487 | case (int)R_PPC_REL14: |
| 2488 | case (int)R_PPC_UADDR32: |
| 2489 | case (int)R_PPC_UADDR16: |
| 2490 | case (int)R_PPC_REL32: |
| 2491 | break; |
| 2492 | |
| 2493 | /* branch taken prediction relocations */ |
| 2494 | case (int)R_PPC_ADDR14_BRTAKEN: |
| 2495 | case (int)R_PPC_REL14_BRTAKEN: |
| 2496 | insn = bfd_get_32 (output_bfd, contents + offset); |
| 2497 | if ((relocation - offset) & 0x8000) |
| 2498 | insn &= ~BRANCH_PREDICT_BIT; |
| 2499 | else |
| 2500 | insn |= BRANCH_PREDICT_BIT; |
| 2501 | bfd_put_32 (output_bfd, insn, contents + offset); |
| 2502 | break; |
| 2503 | |
| 2504 | /* branch not taken predicition relocations */ |
| 2505 | case (int)R_PPC_ADDR14_BRNTAKEN: |
| 2506 | case (int)R_PPC_REL14_BRNTAKEN: |
| 2507 | insn = bfd_get_32 (output_bfd, contents + offset); |
| 2508 | if ((relocation - offset) & 0x8000) |
| 2509 | insn |= BRANCH_PREDICT_BIT; |
| 2510 | else |
| 2511 | insn &= ~BRANCH_PREDICT_BIT; |
| 2512 | bfd_put_32 (output_bfd, insn, contents + offset); |
| 2513 | break; |
| 2514 | |
| 2515 | /* GOT16 relocations */ |
| 2516 | case (int)R_PPC_GOT16: |
| 2517 | case (int)R_PPC_GOT16_LO: |
| 2518 | case (int)R_PPC_GOT16_HI: |
| 2519 | case (int)R_PPC_GOT16_HA: |
| 2520 | relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info, |
| 2521 | got, h, relocation, rel, |
| 2522 | R_PPC_RELATIVE); |
| 2523 | break; |
| 2524 | |
| 2525 | /* Indirect .sdata relocation */ |
| 2526 | case (int)R_PPC_EMB_SDAI16: |
| 2527 | BFD_ASSERT (sdata != NULL); |
| 2528 | relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info, |
| 2529 | sdata, h, relocation, rel, |
| 2530 | R_PPC_RELATIVE); |
| 2531 | break; |
| 2532 | |
| 2533 | /* Indirect .sdata2 relocation */ |
| 2534 | case (int)R_PPC_EMB_SDA2I16: |
| 2535 | BFD_ASSERT (sdata2 != NULL); |
| 2536 | relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info, |
| 2537 | sdata2, h, relocation, rel, |
| 2538 | R_PPC_RELATIVE); |
| 2539 | break; |
| 2540 | |
| 2541 | /* Handle the TOC16 reloc. We want to use the offset within the .got |
| 2542 | section, not the actual VMA. This is appropriate when generating |
| 2543 | an embedded ELF object, for which the .got section acts like the |
| 2544 | AIX .toc section. */ |
| 2545 | case (int)R_PPC_TOC16: /* phony GOT16 relocations */ |
| 2546 | BFD_ASSERT (sec != (asection *)0); |
| 2547 | BFD_ASSERT (bfd_is_und_section (sec) |
| 2548 | || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0 |
| 2549 | || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0) |
| 2550 | |
| 2551 | addend -= sec->output_section->vma + sec->output_offset + 0x8000; |
| 2552 | break; |
| 2553 | |
| 2554 | /* arithmetic adjust relocations */ |
| 2555 | case (int)R_PPC_ADDR16_HA: |
| 2556 | BFD_ASSERT (sec != (asection *)0); |
| 2557 | addend += ((relocation + addend) & 0x8000) << 1; |
| 2558 | break; |
| 2559 | |
| 2560 | /* relocate against _SDA_BASE_ */ |
| 2561 | case (int)R_PPC_SDAREL16: |
| 2562 | BFD_ASSERT (sec != (asection *)0); |
| 2563 | if (strcmp (bfd_get_section_name (abfd, sec), ".sdata") != 0 |
| 2564 | && strcmp (bfd_get_section_name (abfd, sec), ".sbss") != 0) |
| 2565 | { |
| 2566 | (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)", |
| 2567 | bfd_get_filename (input_bfd), |
| 2568 | sym_name, |
| 2569 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 2570 | bfd_get_section_name (abfd, sec)); |
| 2571 | |
| 2572 | bfd_set_error (bfd_error_bad_value); |
| 2573 | ret = false; |
| 2574 | continue; |
| 2575 | } |
| 2576 | addend -= (sdata->sym_hash->root.u.def.value |
| 2577 | + sdata->sym_hash->root.u.def.section->output_section->vma |
| 2578 | + sdata->sym_hash->root.u.def.section->output_offset); |
| 2579 | break; |
| 2580 | |
| 2581 | |
| 2582 | /* relocate against _SDA2_BASE_ */ |
| 2583 | case (int)R_PPC_EMB_SDA2REL: |
| 2584 | BFD_ASSERT (sec != (asection *)0); |
| 2585 | if (strcmp (bfd_get_section_name (abfd, sec), ".sdata2") != 0 |
| 2586 | && strcmp (bfd_get_section_name (abfd, sec), ".sbss2") != 0) |
| 2587 | { |
| 2588 | (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)", |
| 2589 | bfd_get_filename (input_bfd), |
| 2590 | sym_name, |
| 2591 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 2592 | bfd_get_section_name (abfd, sec)); |
| 2593 | |
| 2594 | bfd_set_error (bfd_error_bad_value); |
| 2595 | ret = false; |
| 2596 | continue; |
| 2597 | } |
| 2598 | addend -= (sdata2->sym_hash->root.u.def.value |
| 2599 | + sdata2->sym_hash->root.u.def.section->output_section->vma |
| 2600 | + sdata2->sym_hash->root.u.def.section->output_offset); |
| 2601 | break; |
| 2602 | |
| 2603 | |
| 2604 | /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */ |
| 2605 | case (int)R_PPC_EMB_SDA21: |
| 2606 | case (int)R_PPC_EMB_RELSDA: |
| 2607 | { |
| 2608 | const char *name = bfd_get_section_name (abfd, sec); |
| 2609 | int reg; |
| 2610 | |
| 2611 | BFD_ASSERT (sec != (asection *)0); |
| 2612 | if (strcmp (name, ".sdata") == 0 || strcmp (name, ".sbss") == 0) |
| 2613 | { |
| 2614 | reg = 13; |
| 2615 | addend -= (sdata->sym_hash->root.u.def.value |
| 2616 | + sdata->sym_hash->root.u.def.section->output_section->vma |
| 2617 | + sdata->sym_hash->root.u.def.section->output_offset); |
| 2618 | } |
| 2619 | |
| 2620 | else if (strcmp (name, ".sdata2") == 0 || strcmp (name, ".sbss2") == 0) |
| 2621 | { |
| 2622 | reg = 2; |
| 2623 | addend -= (sdata2->sym_hash->root.u.def.value |
| 2624 | + sdata2->sym_hash->root.u.def.section->output_section->vma |
| 2625 | + sdata2->sym_hash->root.u.def.section->output_offset); |
| 2626 | } |
| 2627 | |
| 2628 | else if (strcmp (name, ".PPC.EMB.sdata0") == 0 || strcmp (name, ".PPC.EMB.sbss0") == 0) |
| 2629 | { |
| 2630 | reg = 0; |
| 2631 | } |
| 2632 | |
| 2633 | else |
| 2634 | { |
| 2635 | (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)", |
| 2636 | bfd_get_filename (input_bfd), |
| 2637 | sym_name, |
| 2638 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 2639 | bfd_get_section_name (abfd, sec)); |
| 2640 | |
| 2641 | bfd_set_error (bfd_error_bad_value); |
| 2642 | ret = false; |
| 2643 | continue; |
| 2644 | } |
| 2645 | |
| 2646 | if (r_type == R_PPC_EMB_SDA21) |
| 2647 | { /* fill in register field */ |
| 2648 | insn = bfd_get_32 (output_bfd, contents + offset); |
| 2649 | insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); |
| 2650 | bfd_put_32 (output_bfd, insn, contents + offset); |
| 2651 | } |
| 2652 | } |
| 2653 | break; |
| 2654 | |
| 2655 | /* Relocate against the beginning of the section */ |
| 2656 | case (int)R_PPC_SECTOFF: |
| 2657 | case (int)R_PPC_SECTOFF_LO: |
| 2658 | case (int)R_PPC_SECTOFF_HI: |
| 2659 | BFD_ASSERT (sec != (asection *)0); |
| 2660 | addend -= sec->output_section->vma; |
| 2661 | break; |
| 2662 | |
| 2663 | case (int)R_PPC_SECTOFF_HA: |
| 2664 | BFD_ASSERT (sec != (asection *)0); |
| 2665 | addend -= sec->output_section->vma; |
| 2666 | addend += ((relocation + addend) & 0x8000) << 1; |
| 2667 | break; |
| 2668 | |
| 2669 | /* Negative relocations */ |
| 2670 | case (int)R_PPC_EMB_NADDR32: |
| 2671 | case (int)R_PPC_EMB_NADDR16: |
| 2672 | case (int)R_PPC_EMB_NADDR16_LO: |
| 2673 | case (int)R_PPC_EMB_NADDR16_HI: |
| 2674 | addend -= 2*relocation; |
| 2675 | break; |
| 2676 | |
| 2677 | case (int)R_PPC_EMB_NADDR16_HA: |
| 2678 | addend -= 2*relocation; |
| 2679 | addend += ((relocation + addend) & 0x8000) << 1; |
| 2680 | break; |
| 2681 | |
| 2682 | /* NOP relocation that prevents garbage collecting linkers from omitting a |
| 2683 | reference. */ |
| 2684 | case (int)R_PPC_EMB_MRKREF: |
| 2685 | continue; |
| 2686 | |
| 2687 | case (int)R_PPC_PLTREL24: |
| 2688 | case (int)R_PPC_COPY: |
| 2689 | case (int)R_PPC_GLOB_DAT: |
| 2690 | case (int)R_PPC_JMP_SLOT: |
| 2691 | case (int)R_PPC_RELATIVE: |
| 2692 | case (int)R_PPC_LOCAL24PC: |
| 2693 | case (int)R_PPC_PLT32: |
| 2694 | case (int)R_PPC_PLTREL32: |
| 2695 | case (int)R_PPC_PLT16_LO: |
| 2696 | case (int)R_PPC_PLT16_HI: |
| 2697 | case (int)R_PPC_PLT16_HA: |
| 2698 | case (int)R_PPC_EMB_RELSEC16: |
| 2699 | case (int)R_PPC_EMB_RELST_LO: |
| 2700 | case (int)R_PPC_EMB_RELST_HI: |
| 2701 | case (int)R_PPC_EMB_RELST_HA: |
| 2702 | case (int)R_PPC_EMB_BIT_FLD: |
| 2703 | (*_bfd_error_handler) ("%s: Relocation %s is not yet supported for symbol %s.", |
| 2704 | bfd_get_filename (input_bfd), |
| 2705 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 2706 | sym_name); |
| 2707 | |
| 2708 | bfd_set_error (bfd_error_invalid_operation); |
| 2709 | ret = false; |
| 2710 | continue; |
| 2711 | } |
| 2712 | |
| 2713 | |
| 2714 | #ifdef DEBUG |
| 2715 | fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n", |
| 2716 | howto->name, |
| 2717 | (int)r_type, |
| 2718 | sym_name, |
| 2719 | r_symndx, |
| 2720 | (long)offset, |
| 2721 | (long)addend); |
| 2722 | #endif |
| 2723 | |
| 2724 | r = _bfd_final_link_relocate (howto, |
| 2725 | input_bfd, |
| 2726 | input_section, |
| 2727 | contents, |
| 2728 | offset, |
| 2729 | relocation, |
| 2730 | addend); |
| 2731 | |
| 2732 | if (r != bfd_reloc_ok) |
| 2733 | { |
| 2734 | ret = false; |
| 2735 | switch (r) |
| 2736 | { |
| 2737 | default: |
| 2738 | break; |
| 2739 | |
| 2740 | case bfd_reloc_overflow: |
| 2741 | { |
| 2742 | const char *name; |
| 2743 | |
| 2744 | if (h != NULL) |
| 2745 | name = h->root.root.string; |
| 2746 | else |
| 2747 | { |
| 2748 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 2749 | symtab_hdr->sh_link, |
| 2750 | sym->st_name); |
| 2751 | if (name == NULL) |
| 2752 | break; |
| 2753 | |
| 2754 | if (*name == '\0') |
| 2755 | name = bfd_section_name (input_bfd, sec); |
| 2756 | } |
| 2757 | |
| 2758 | (*info->callbacks->reloc_overflow)(info, |
| 2759 | name, |
| 2760 | howto->name, |
| 2761 | (bfd_vma) 0, |
| 2762 | input_bfd, |
| 2763 | input_section, |
| 2764 | offset); |
| 2765 | } |
| 2766 | break; |
| 2767 | |
| 2768 | } |
| 2769 | } |
| 2770 | } |
| 2771 | |
| 2772 | |
| 2773 | #ifdef DEBUG |
| 2774 | fprintf (stderr, "\n"); |
| 2775 | #endif |
| 2776 | |
| 2777 | return ret; |
| 2778 | } |
| 2779 | |
| 2780 | \f |
| 2781 | #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec |
| 2782 | #define TARGET_LITTLE_NAME "elf32-powerpcle" |
| 2783 | #define TARGET_BIG_SYM bfd_elf32_powerpc_vec |
| 2784 | #define TARGET_BIG_NAME "elf32-powerpc" |
| 2785 | #define ELF_ARCH bfd_arch_powerpc |
| 2786 | #define ELF_MACHINE_CODE EM_PPC |
| 2787 | #define ELF_MAXPAGESIZE 0x10000 |
| 2788 | #define elf_info_to_howto ppc_elf_info_to_howto |
| 2789 | |
| 2790 | #ifdef EM_CYGNUS_POWERPC |
| 2791 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC |
| 2792 | #endif |
| 2793 | |
| 2794 | #ifdef EM_PPC_OLD |
| 2795 | #define ELF_MACHINE_ALT2 EM_PPC_OLD |
| 2796 | #endif |
| 2797 | |
| 2798 | #define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data |
| 2799 | #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data |
| 2800 | #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags |
| 2801 | #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup |
| 2802 | #define elf_backend_section_from_shdr ppc_elf_section_from_shdr |
| 2803 | #define elf_backend_relocate_section ppc_elf_relocate_section |
| 2804 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
| 2805 | #define elf_backend_check_relocs ppc_elf_check_relocs |
| 2806 | #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol |
| 2807 | #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook |
| 2808 | #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections |
| 2809 | #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol |
| 2810 | #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections |
| 2811 | #define elf_backend_fake_sections ppc_elf_fake_sections |
| 2812 | #define elf_backend_additional_program_headers ppc_elf_additional_program_headers |
| 2813 | #define elf_backend_modify_segment_map ppc_elf_modify_segment_map |
| 2814 | |
| 2815 | #include "elf32-target.h" |