| 1 | /* PowerPC-specific support for 32-bit ELF |
| 2 | Copyright 1994, 1995, 1996, 1997 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 bfd_reloc_status_type ppc_elf_addr16_ha_reloc |
| 108 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 109 | static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword)); |
| 110 | static boolean ppc_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *)); |
| 111 | static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); |
| 112 | |
| 113 | static int ppc_elf_additional_program_headers PARAMS ((bfd *)); |
| 114 | static boolean ppc_elf_modify_segment_map PARAMS ((bfd *)); |
| 115 | |
| 116 | static boolean ppc_elf_section_from_shdr PARAMS ((bfd *, |
| 117 | Elf32_Internal_Shdr *, |
| 118 | char *)); |
| 119 | static boolean ppc_elf_fake_sections |
| 120 | PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *)); |
| 121 | |
| 122 | static elf_linker_section_t *ppc_elf_create_linker_section |
| 123 | PARAMS ((bfd *abfd, |
| 124 | struct bfd_link_info *info, |
| 125 | enum elf_linker_section_enum)); |
| 126 | |
| 127 | static boolean ppc_elf_check_relocs PARAMS ((bfd *, |
| 128 | struct bfd_link_info *, |
| 129 | asection *, |
| 130 | const Elf_Internal_Rela *)); |
| 131 | |
| 132 | static boolean ppc_elf_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *, |
| 133 | struct elf_link_hash_entry *)); |
| 134 | |
| 135 | static boolean ppc_elf_adjust_dynindx PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 136 | |
| 137 | static boolean ppc_elf_size_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); |
| 138 | |
| 139 | static boolean ppc_elf_relocate_section PARAMS ((bfd *, |
| 140 | struct bfd_link_info *info, |
| 141 | bfd *, |
| 142 | asection *, |
| 143 | bfd_byte *, |
| 144 | Elf_Internal_Rela *relocs, |
| 145 | Elf_Internal_Sym *local_syms, |
| 146 | asection **)); |
| 147 | |
| 148 | static boolean ppc_elf_add_symbol_hook PARAMS ((bfd *, |
| 149 | struct bfd_link_info *, |
| 150 | const Elf_Internal_Sym *, |
| 151 | const char **, |
| 152 | flagword *, |
| 153 | asection **, |
| 154 | bfd_vma *)); |
| 155 | |
| 156 | static boolean ppc_elf_finish_dynamic_symbol PARAMS ((bfd *, |
| 157 | struct bfd_link_info *, |
| 158 | struct elf_link_hash_entry *, |
| 159 | Elf_Internal_Sym *)); |
| 160 | |
| 161 | static boolean ppc_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *)); |
| 162 | |
| 163 | #define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */ |
| 164 | #define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */ |
| 165 | #define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */ |
| 166 | |
| 167 | /* The name of the dynamic interpreter. This is put in the .interp |
| 168 | section. */ |
| 169 | |
| 170 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 171 | |
| 172 | /* The size in bytes of an entry in the procedure linkage table, and of the initial size |
| 173 | of the plt reserved for the dynamic linker. */ |
| 174 | |
| 175 | #define PLT_ENTRY_SIZE 12 |
| 176 | #define PLT_INITIAL_ENTRY_SIZE 72 |
| 177 | |
| 178 | \f |
| 179 | static reloc_howto_type *ppc_elf_howto_table[ (int)R_PPC_max ]; |
| 180 | |
| 181 | static reloc_howto_type ppc_elf_howto_raw[] = |
| 182 | { |
| 183 | /* This reloc does nothing. */ |
| 184 | HOWTO (R_PPC_NONE, /* type */ |
| 185 | 0, /* rightshift */ |
| 186 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 187 | 32, /* bitsize */ |
| 188 | false, /* pc_relative */ |
| 189 | 0, /* bitpos */ |
| 190 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 191 | bfd_elf_generic_reloc, /* special_function */ |
| 192 | "R_PPC_NONE", /* name */ |
| 193 | false, /* partial_inplace */ |
| 194 | 0, /* src_mask */ |
| 195 | 0, /* dst_mask */ |
| 196 | false), /* pcrel_offset */ |
| 197 | |
| 198 | /* A standard 32 bit relocation. */ |
| 199 | HOWTO (R_PPC_ADDR32, /* type */ |
| 200 | 0, /* rightshift */ |
| 201 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 202 | 32, /* bitsize */ |
| 203 | false, /* pc_relative */ |
| 204 | 0, /* bitpos */ |
| 205 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 206 | bfd_elf_generic_reloc, /* special_function */ |
| 207 | "R_PPC_ADDR32", /* name */ |
| 208 | false, /* partial_inplace */ |
| 209 | 0, /* src_mask */ |
| 210 | 0xffffffff, /* dst_mask */ |
| 211 | false), /* pcrel_offset */ |
| 212 | |
| 213 | /* An absolute 26 bit branch; the lower two bits must be zero. |
| 214 | FIXME: we don't check that, we just clear them. */ |
| 215 | HOWTO (R_PPC_ADDR24, /* type */ |
| 216 | 0, /* rightshift */ |
| 217 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 218 | 26, /* bitsize */ |
| 219 | false, /* pc_relative */ |
| 220 | 0, /* bitpos */ |
| 221 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 222 | bfd_elf_generic_reloc, /* special_function */ |
| 223 | "R_PPC_ADDR24", /* name */ |
| 224 | false, /* partial_inplace */ |
| 225 | 0, /* src_mask */ |
| 226 | 0x3fffffc, /* dst_mask */ |
| 227 | false), /* pcrel_offset */ |
| 228 | |
| 229 | /* A standard 16 bit relocation. */ |
| 230 | HOWTO (R_PPC_ADDR16, /* type */ |
| 231 | 0, /* rightshift */ |
| 232 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 233 | 16, /* bitsize */ |
| 234 | false, /* pc_relative */ |
| 235 | 0, /* bitpos */ |
| 236 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 237 | bfd_elf_generic_reloc, /* special_function */ |
| 238 | "R_PPC_ADDR16", /* name */ |
| 239 | false, /* partial_inplace */ |
| 240 | 0, /* src_mask */ |
| 241 | 0xffff, /* dst_mask */ |
| 242 | false), /* pcrel_offset */ |
| 243 | |
| 244 | /* A 16 bit relocation without overflow. */ |
| 245 | HOWTO (R_PPC_ADDR16_LO, /* type */ |
| 246 | 0, /* rightshift */ |
| 247 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 248 | 16, /* bitsize */ |
| 249 | false, /* pc_relative */ |
| 250 | 0, /* bitpos */ |
| 251 | complain_overflow_dont,/* complain_on_overflow */ |
| 252 | bfd_elf_generic_reloc, /* special_function */ |
| 253 | "R_PPC_ADDR16_LO", /* name */ |
| 254 | false, /* partial_inplace */ |
| 255 | 0, /* src_mask */ |
| 256 | 0xffff, /* dst_mask */ |
| 257 | false), /* pcrel_offset */ |
| 258 | |
| 259 | /* The high order 16 bits of an address. */ |
| 260 | HOWTO (R_PPC_ADDR16_HI, /* type */ |
| 261 | 16, /* rightshift */ |
| 262 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 263 | 16, /* bitsize */ |
| 264 | false, /* pc_relative */ |
| 265 | 0, /* bitpos */ |
| 266 | complain_overflow_dont, /* complain_on_overflow */ |
| 267 | bfd_elf_generic_reloc, /* special_function */ |
| 268 | "R_PPC_ADDR16_HI", /* name */ |
| 269 | false, /* partial_inplace */ |
| 270 | 0, /* src_mask */ |
| 271 | 0xffff, /* dst_mask */ |
| 272 | false), /* pcrel_offset */ |
| 273 | |
| 274 | /* The high order 16 bits of an address, plus 1 if the contents of |
| 275 | the low 16 bits, treated as a signed number, is negative. */ |
| 276 | HOWTO (R_PPC_ADDR16_HA, /* type */ |
| 277 | 16, /* rightshift */ |
| 278 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 279 | 16, /* bitsize */ |
| 280 | false, /* pc_relative */ |
| 281 | 0, /* bitpos */ |
| 282 | complain_overflow_dont, /* complain_on_overflow */ |
| 283 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 284 | "R_PPC_ADDR16_HA", /* name */ |
| 285 | false, /* partial_inplace */ |
| 286 | 0, /* src_mask */ |
| 287 | 0xffff, /* dst_mask */ |
| 288 | false), /* pcrel_offset */ |
| 289 | |
| 290 | /* An absolute 16 bit branch; the lower two bits must be zero. |
| 291 | FIXME: we don't check that, we just clear them. */ |
| 292 | HOWTO (R_PPC_ADDR14, /* type */ |
| 293 | 0, /* rightshift */ |
| 294 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 295 | 16, /* bitsize */ |
| 296 | false, /* pc_relative */ |
| 297 | 0, /* bitpos */ |
| 298 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 299 | bfd_elf_generic_reloc, /* special_function */ |
| 300 | "R_PPC_ADDR14", /* name */ |
| 301 | false, /* partial_inplace */ |
| 302 | 0, /* src_mask */ |
| 303 | 0xfffc, /* dst_mask */ |
| 304 | false), /* pcrel_offset */ |
| 305 | |
| 306 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 307 | indicate that the branch is expected to be taken. The lower two |
| 308 | bits must be zero. */ |
| 309 | HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ |
| 310 | 0, /* rightshift */ |
| 311 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 312 | 16, /* bitsize */ |
| 313 | false, /* pc_relative */ |
| 314 | 0, /* bitpos */ |
| 315 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 316 | bfd_elf_generic_reloc, /* special_function */ |
| 317 | "R_PPC_ADDR14_BRTAKEN",/* name */ |
| 318 | false, /* partial_inplace */ |
| 319 | 0, /* src_mask */ |
| 320 | 0xfffc, /* dst_mask */ |
| 321 | false), /* pcrel_offset */ |
| 322 | |
| 323 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 324 | indicate that the branch is not expected to be taken. The lower |
| 325 | two bits must be zero. */ |
| 326 | HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ |
| 327 | 0, /* rightshift */ |
| 328 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 329 | 16, /* bitsize */ |
| 330 | false, /* pc_relative */ |
| 331 | 0, /* bitpos */ |
| 332 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 333 | bfd_elf_generic_reloc, /* special_function */ |
| 334 | "R_PPC_ADDR14_BRNTAKEN",/* name */ |
| 335 | false, /* partial_inplace */ |
| 336 | 0, /* src_mask */ |
| 337 | 0xfffc, /* dst_mask */ |
| 338 | false), /* pcrel_offset */ |
| 339 | |
| 340 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
| 341 | HOWTO (R_PPC_REL24, /* type */ |
| 342 | 0, /* rightshift */ |
| 343 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 344 | 26, /* bitsize */ |
| 345 | true, /* pc_relative */ |
| 346 | 0, /* bitpos */ |
| 347 | complain_overflow_signed, /* complain_on_overflow */ |
| 348 | bfd_elf_generic_reloc, /* special_function */ |
| 349 | "R_PPC_REL24", /* name */ |
| 350 | false, /* partial_inplace */ |
| 351 | 0, /* src_mask */ |
| 352 | 0x3fffffc, /* dst_mask */ |
| 353 | true), /* pcrel_offset */ |
| 354 | |
| 355 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
| 356 | HOWTO (R_PPC_REL14, /* type */ |
| 357 | 0, /* rightshift */ |
| 358 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 359 | 16, /* bitsize */ |
| 360 | true, /* pc_relative */ |
| 361 | 0, /* bitpos */ |
| 362 | complain_overflow_signed, /* complain_on_overflow */ |
| 363 | bfd_elf_generic_reloc, /* special_function */ |
| 364 | "R_PPC_REL14", /* name */ |
| 365 | false, /* partial_inplace */ |
| 366 | 0, /* src_mask */ |
| 367 | 0xfffc, /* dst_mask */ |
| 368 | true), /* pcrel_offset */ |
| 369 | |
| 370 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 371 | the branch is expected to be taken. The lower two bits must be |
| 372 | zero. */ |
| 373 | HOWTO (R_PPC_REL14_BRTAKEN, /* type */ |
| 374 | 0, /* rightshift */ |
| 375 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 376 | 16, /* bitsize */ |
| 377 | true, /* pc_relative */ |
| 378 | 0, /* bitpos */ |
| 379 | complain_overflow_signed, /* complain_on_overflow */ |
| 380 | bfd_elf_generic_reloc, /* special_function */ |
| 381 | "R_PPC_REL14_BRTAKEN", /* name */ |
| 382 | false, /* partial_inplace */ |
| 383 | 0, /* src_mask */ |
| 384 | 0xfffc, /* dst_mask */ |
| 385 | true), /* pcrel_offset */ |
| 386 | |
| 387 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 388 | the branch is not expected to be taken. The lower two bits must |
| 389 | be zero. */ |
| 390 | HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ |
| 391 | 0, /* rightshift */ |
| 392 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 393 | 16, /* bitsize */ |
| 394 | true, /* pc_relative */ |
| 395 | 0, /* bitpos */ |
| 396 | complain_overflow_signed, /* complain_on_overflow */ |
| 397 | bfd_elf_generic_reloc, /* special_function */ |
| 398 | "R_PPC_REL14_BRNTAKEN",/* name */ |
| 399 | false, /* partial_inplace */ |
| 400 | 0, /* src_mask */ |
| 401 | 0xfffc, /* dst_mask */ |
| 402 | true), /* pcrel_offset */ |
| 403 | |
| 404 | /* Like R_PPC_ADDR16, but referring to the GOT table entry for the |
| 405 | symbol. */ |
| 406 | HOWTO (R_PPC_GOT16, /* type */ |
| 407 | 0, /* rightshift */ |
| 408 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 409 | 16, /* bitsize */ |
| 410 | false, /* pc_relative */ |
| 411 | 0, /* bitpos */ |
| 412 | complain_overflow_signed, /* complain_on_overflow */ |
| 413 | bfd_elf_generic_reloc, /* special_function */ |
| 414 | "R_PPC_GOT16", /* name */ |
| 415 | false, /* partial_inplace */ |
| 416 | 0, /* src_mask */ |
| 417 | 0xffff, /* dst_mask */ |
| 418 | false), /* pcrel_offset */ |
| 419 | |
| 420 | /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for |
| 421 | the symbol. */ |
| 422 | HOWTO (R_PPC_GOT16_LO, /* type */ |
| 423 | 0, /* rightshift */ |
| 424 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 425 | 16, /* bitsize */ |
| 426 | false, /* pc_relative */ |
| 427 | 0, /* bitpos */ |
| 428 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 429 | bfd_elf_generic_reloc, /* special_function */ |
| 430 | "R_PPC_GOT16_LO", /* name */ |
| 431 | false, /* partial_inplace */ |
| 432 | 0, /* src_mask */ |
| 433 | 0xffff, /* dst_mask */ |
| 434 | false), /* pcrel_offset */ |
| 435 | |
| 436 | /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for |
| 437 | the symbol. */ |
| 438 | HOWTO (R_PPC_GOT16_HI, /* type */ |
| 439 | 16, /* rightshift */ |
| 440 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 441 | 16, /* bitsize */ |
| 442 | false, /* pc_relative */ |
| 443 | 0, /* bitpos */ |
| 444 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 445 | bfd_elf_generic_reloc, /* special_function */ |
| 446 | "R_PPC_GOT16_HI", /* name */ |
| 447 | false, /* partial_inplace */ |
| 448 | 0, /* src_mask */ |
| 449 | 0xffff, /* dst_mask */ |
| 450 | false), /* pcrel_offset */ |
| 451 | |
| 452 | /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for |
| 453 | the symbol. */ |
| 454 | HOWTO (R_PPC_GOT16_HA, /* type */ |
| 455 | 16, /* rightshift */ |
| 456 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 457 | 16, /* bitsize */ |
| 458 | false, /* pc_relative */ |
| 459 | 0, /* bitpos */ |
| 460 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 461 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 462 | "R_PPC_GOT16_HA", /* name */ |
| 463 | false, /* partial_inplace */ |
| 464 | 0, /* src_mask */ |
| 465 | 0xffff, /* dst_mask */ |
| 466 | false), /* pcrel_offset */ |
| 467 | |
| 468 | /* Like R_PPC_REL24, but referring to the procedure linkage table |
| 469 | entry for the symbol. FIXME: Not supported. */ |
| 470 | HOWTO (R_PPC_PLTREL24, /* type */ |
| 471 | 0, /* rightshift */ |
| 472 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 473 | 26, /* bitsize */ |
| 474 | true, /* pc_relative */ |
| 475 | 0, /* bitpos */ |
| 476 | complain_overflow_signed, /* complain_on_overflow */ |
| 477 | bfd_elf_generic_reloc, /* special_function */ |
| 478 | "R_PPC_PLTREL24", /* name */ |
| 479 | false, /* partial_inplace */ |
| 480 | 0, /* src_mask */ |
| 481 | 0x3fffffc, /* dst_mask */ |
| 482 | true), /* pcrel_offset */ |
| 483 | |
| 484 | /* This is used only by the dynamic linker. The symbol should exist |
| 485 | both in the object being run and in some shared library. The |
| 486 | dynamic linker copies the data addressed by the symbol from the |
| 487 | shared library into the object. I have no idea what the purpose |
| 488 | of this is. */ |
| 489 | HOWTO (R_PPC_COPY, /* type */ |
| 490 | 0, /* rightshift */ |
| 491 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 492 | 32, /* bitsize */ |
| 493 | false, /* pc_relative */ |
| 494 | 0, /* bitpos */ |
| 495 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 496 | bfd_elf_generic_reloc, /* special_function */ |
| 497 | "R_PPC_COPY", /* name */ |
| 498 | false, /* partial_inplace */ |
| 499 | 0, /* src_mask */ |
| 500 | 0, /* dst_mask */ |
| 501 | false), /* pcrel_offset */ |
| 502 | |
| 503 | /* Like R_PPC_ADDR32, but used when setting global offset table |
| 504 | entries. */ |
| 505 | HOWTO (R_PPC_GLOB_DAT, /* type */ |
| 506 | 0, /* rightshift */ |
| 507 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 508 | 32, /* bitsize */ |
| 509 | false, /* pc_relative */ |
| 510 | 0, /* bitpos */ |
| 511 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 512 | bfd_elf_generic_reloc, /* special_function */ |
| 513 | "R_PPC_GLOB_DAT", /* name */ |
| 514 | false, /* partial_inplace */ |
| 515 | 0, /* src_mask */ |
| 516 | 0xffffffff, /* dst_mask */ |
| 517 | false), /* pcrel_offset */ |
| 518 | |
| 519 | /* Marks a procedure linkage table entry for a symbol. */ |
| 520 | HOWTO (R_PPC_JMP_SLOT, /* type */ |
| 521 | 0, /* rightshift */ |
| 522 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 523 | 32, /* bitsize */ |
| 524 | false, /* pc_relative */ |
| 525 | 0, /* bitpos */ |
| 526 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 527 | bfd_elf_generic_reloc, /* special_function */ |
| 528 | "R_PPC_JMP_SLOT", /* name */ |
| 529 | false, /* partial_inplace */ |
| 530 | 0, /* src_mask */ |
| 531 | 0, /* dst_mask */ |
| 532 | false), /* pcrel_offset */ |
| 533 | |
| 534 | /* Used only by the dynamic linker. When the object is run, this |
| 535 | longword is set to the load address of the object, plus the |
| 536 | addend. */ |
| 537 | HOWTO (R_PPC_RELATIVE, /* type */ |
| 538 | 0, /* rightshift */ |
| 539 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 540 | 32, /* bitsize */ |
| 541 | false, /* pc_relative */ |
| 542 | 0, /* bitpos */ |
| 543 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 544 | bfd_elf_generic_reloc, /* special_function */ |
| 545 | "R_PPC_RELATIVE", /* name */ |
| 546 | false, /* partial_inplace */ |
| 547 | 0, /* src_mask */ |
| 548 | 0xffffffff, /* dst_mask */ |
| 549 | false), /* pcrel_offset */ |
| 550 | |
| 551 | /* Like R_PPC_REL24, but uses the value of the symbol within the |
| 552 | object rather than the final value. Normally used for |
| 553 | _GLOBAL_OFFSET_TABLE_. FIXME: Not supported. */ |
| 554 | HOWTO (R_PPC_LOCAL24PC, /* type */ |
| 555 | 0, /* rightshift */ |
| 556 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 557 | 26, /* bitsize */ |
| 558 | true, /* pc_relative */ |
| 559 | 0, /* bitpos */ |
| 560 | complain_overflow_signed, /* complain_on_overflow */ |
| 561 | bfd_elf_generic_reloc, /* special_function */ |
| 562 | "R_PPC_LOCAL24PC", /* name */ |
| 563 | false, /* partial_inplace */ |
| 564 | 0, /* src_mask */ |
| 565 | 0x3fffffc, /* dst_mask */ |
| 566 | true), /* pcrel_offset */ |
| 567 | |
| 568 | /* Like R_PPC_ADDR32, but may be unaligned. */ |
| 569 | HOWTO (R_PPC_UADDR32, /* type */ |
| 570 | 0, /* rightshift */ |
| 571 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 572 | 32, /* bitsize */ |
| 573 | false, /* pc_relative */ |
| 574 | 0, /* bitpos */ |
| 575 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 576 | bfd_elf_generic_reloc, /* special_function */ |
| 577 | "R_PPC_UADDR32", /* name */ |
| 578 | false, /* partial_inplace */ |
| 579 | 0, /* src_mask */ |
| 580 | 0xffffffff, /* dst_mask */ |
| 581 | false), /* pcrel_offset */ |
| 582 | |
| 583 | /* Like R_PPC_ADDR16, but may be unaligned. */ |
| 584 | HOWTO (R_PPC_UADDR16, /* type */ |
| 585 | 0, /* rightshift */ |
| 586 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 587 | 16, /* bitsize */ |
| 588 | false, /* pc_relative */ |
| 589 | 0, /* bitpos */ |
| 590 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 591 | bfd_elf_generic_reloc, /* special_function */ |
| 592 | "R_PPC_UADDR16", /* name */ |
| 593 | false, /* partial_inplace */ |
| 594 | 0, /* src_mask */ |
| 595 | 0xffff, /* dst_mask */ |
| 596 | false), /* pcrel_offset */ |
| 597 | |
| 598 | /* 32-bit PC relative */ |
| 599 | HOWTO (R_PPC_REL32, /* type */ |
| 600 | 0, /* rightshift */ |
| 601 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 602 | 32, /* bitsize */ |
| 603 | true, /* pc_relative */ |
| 604 | 0, /* bitpos */ |
| 605 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 606 | bfd_elf_generic_reloc, /* special_function */ |
| 607 | "R_PPC_REL32", /* name */ |
| 608 | false, /* partial_inplace */ |
| 609 | 0, /* src_mask */ |
| 610 | 0xffffffff, /* dst_mask */ |
| 611 | true), /* pcrel_offset */ |
| 612 | |
| 613 | /* 32-bit relocation to the symbol's procedure linkage table. |
| 614 | FIXEME: not supported. */ |
| 615 | HOWTO (R_PPC_PLT32, /* type */ |
| 616 | 0, /* rightshift */ |
| 617 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 618 | 32, /* bitsize */ |
| 619 | false, /* pc_relative */ |
| 620 | 0, /* bitpos */ |
| 621 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 622 | bfd_elf_generic_reloc, /* special_function */ |
| 623 | "R_PPC_PLT32", /* name */ |
| 624 | false, /* partial_inplace */ |
| 625 | 0, /* src_mask */ |
| 626 | 0, /* dst_mask */ |
| 627 | false), /* pcrel_offset */ |
| 628 | |
| 629 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| 630 | FIXEME: not supported. */ |
| 631 | HOWTO (R_PPC_PLTREL32, /* type */ |
| 632 | 0, /* rightshift */ |
| 633 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 634 | 32, /* bitsize */ |
| 635 | true, /* pc_relative */ |
| 636 | 0, /* bitpos */ |
| 637 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 638 | bfd_elf_generic_reloc, /* special_function */ |
| 639 | "R_PPC_PLTREL32", /* name */ |
| 640 | false, /* partial_inplace */ |
| 641 | 0, /* src_mask */ |
| 642 | 0, /* dst_mask */ |
| 643 | true), /* pcrel_offset */ |
| 644 | |
| 645 | /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for |
| 646 | the symbol. */ |
| 647 | HOWTO (R_PPC_PLT16_LO, /* type */ |
| 648 | 0, /* rightshift */ |
| 649 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 650 | 16, /* bitsize */ |
| 651 | false, /* pc_relative */ |
| 652 | 0, /* bitpos */ |
| 653 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 654 | bfd_elf_generic_reloc, /* special_function */ |
| 655 | "R_PPC_PLT16_LO", /* name */ |
| 656 | false, /* partial_inplace */ |
| 657 | 0, /* src_mask */ |
| 658 | 0xffff, /* dst_mask */ |
| 659 | false), /* pcrel_offset */ |
| 660 | |
| 661 | /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for |
| 662 | the symbol. */ |
| 663 | HOWTO (R_PPC_PLT16_HI, /* type */ |
| 664 | 16, /* rightshift */ |
| 665 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 666 | 16, /* bitsize */ |
| 667 | false, /* pc_relative */ |
| 668 | 0, /* bitpos */ |
| 669 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 670 | bfd_elf_generic_reloc, /* special_function */ |
| 671 | "R_PPC_PLT16_HI", /* name */ |
| 672 | false, /* partial_inplace */ |
| 673 | 0, /* src_mask */ |
| 674 | 0xffff, /* dst_mask */ |
| 675 | false), /* pcrel_offset */ |
| 676 | |
| 677 | /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for |
| 678 | the symbol. FIXME: Not supported. */ |
| 679 | HOWTO (R_PPC_PLT16_HA, /* type */ |
| 680 | 0, /* rightshift */ |
| 681 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 682 | 16, /* bitsize */ |
| 683 | false, /* pc_relative */ |
| 684 | 0, /* bitpos */ |
| 685 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 686 | bfd_elf_generic_reloc, /* special_function */ |
| 687 | "R_PPC_PLT16_HA", /* name */ |
| 688 | false, /* partial_inplace */ |
| 689 | 0, /* src_mask */ |
| 690 | 0xffff, /* dst_mask */ |
| 691 | false), /* pcrel_offset */ |
| 692 | |
| 693 | /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with |
| 694 | small data items. */ |
| 695 | HOWTO (R_PPC_SDAREL16, /* type */ |
| 696 | 0, /* rightshift */ |
| 697 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 698 | 16, /* bitsize */ |
| 699 | false, /* pc_relative */ |
| 700 | 0, /* bitpos */ |
| 701 | complain_overflow_signed, /* complain_on_overflow */ |
| 702 | bfd_elf_generic_reloc, /* special_function */ |
| 703 | "R_PPC_SDAREL16", /* name */ |
| 704 | false, /* partial_inplace */ |
| 705 | 0, /* src_mask */ |
| 706 | 0xffff, /* dst_mask */ |
| 707 | false), /* pcrel_offset */ |
| 708 | |
| 709 | /* 32-bit section relative relocation. */ |
| 710 | HOWTO (R_PPC_SECTOFF, /* type */ |
| 711 | 0, /* rightshift */ |
| 712 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 713 | 32, /* bitsize */ |
| 714 | true, /* pc_relative */ |
| 715 | 0, /* bitpos */ |
| 716 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 717 | bfd_elf_generic_reloc, /* special_function */ |
| 718 | "R_PPC_SECTOFF", /* name */ |
| 719 | false, /* partial_inplace */ |
| 720 | 0, /* src_mask */ |
| 721 | 0, /* dst_mask */ |
| 722 | true), /* pcrel_offset */ |
| 723 | |
| 724 | /* 16-bit lower half section relative relocation. */ |
| 725 | HOWTO (R_PPC_SECTOFF_LO, /* type */ |
| 726 | 0, /* rightshift */ |
| 727 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 728 | 16, /* bitsize */ |
| 729 | false, /* pc_relative */ |
| 730 | 0, /* bitpos */ |
| 731 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 732 | bfd_elf_generic_reloc, /* special_function */ |
| 733 | "R_PPC_SECTOFF_LO", /* name */ |
| 734 | false, /* partial_inplace */ |
| 735 | 0, /* src_mask */ |
| 736 | 0xffff, /* dst_mask */ |
| 737 | false), /* pcrel_offset */ |
| 738 | |
| 739 | /* 16-bit upper half section relative relocation. */ |
| 740 | HOWTO (R_PPC_SECTOFF_HI, /* type */ |
| 741 | 16, /* rightshift */ |
| 742 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 743 | 16, /* bitsize */ |
| 744 | false, /* pc_relative */ |
| 745 | 0, /* bitpos */ |
| 746 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 747 | bfd_elf_generic_reloc, /* special_function */ |
| 748 | "R_PPC_SECTOFF_HI", /* name */ |
| 749 | false, /* partial_inplace */ |
| 750 | 0, /* src_mask */ |
| 751 | 0xffff, /* dst_mask */ |
| 752 | false), /* pcrel_offset */ |
| 753 | |
| 754 | /* 16-bit upper half adjusted section relative relocation. */ |
| 755 | HOWTO (R_PPC_SECTOFF_HA, /* type */ |
| 756 | 0, /* rightshift */ |
| 757 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 758 | 16, /* bitsize */ |
| 759 | false, /* pc_relative */ |
| 760 | 0, /* bitpos */ |
| 761 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 762 | bfd_elf_generic_reloc, /* special_function */ |
| 763 | "R_PPC_SECTOFF_HA", /* name */ |
| 764 | false, /* partial_inplace */ |
| 765 | 0, /* src_mask */ |
| 766 | 0xffff, /* dst_mask */ |
| 767 | false), /* pcrel_offset */ |
| 768 | |
| 769 | /* The remaining relocs are from the Embedded ELF ABI, and are not |
| 770 | in the SVR4 ELF ABI. */ |
| 771 | |
| 772 | /* 32 bit value resulting from the addend minus the symbol */ |
| 773 | HOWTO (R_PPC_EMB_NADDR32, /* type */ |
| 774 | 0, /* rightshift */ |
| 775 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 776 | 32, /* bitsize */ |
| 777 | false, /* pc_relative */ |
| 778 | 0, /* bitpos */ |
| 779 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 780 | bfd_elf_generic_reloc, /* special_function */ |
| 781 | "R_PPC_EMB_NADDR32", /* name */ |
| 782 | false, /* partial_inplace */ |
| 783 | 0, /* src_mask */ |
| 784 | 0xffffffff, /* dst_mask */ |
| 785 | false), /* pcrel_offset */ |
| 786 | |
| 787 | /* 16 bit value resulting from the addend minus the symbol */ |
| 788 | HOWTO (R_PPC_EMB_NADDR16, /* type */ |
| 789 | 0, /* rightshift */ |
| 790 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 791 | 16, /* bitsize */ |
| 792 | false, /* pc_relative */ |
| 793 | 0, /* bitpos */ |
| 794 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 795 | bfd_elf_generic_reloc, /* special_function */ |
| 796 | "R_PPC_EMB_NADDR16", /* name */ |
| 797 | false, /* partial_inplace */ |
| 798 | 0, /* src_mask */ |
| 799 | 0xffff, /* dst_mask */ |
| 800 | false), /* pcrel_offset */ |
| 801 | |
| 802 | /* 16 bit value resulting from the addend minus the symbol */ |
| 803 | HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ |
| 804 | 0, /* rightshift */ |
| 805 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 806 | 16, /* bitsize */ |
| 807 | false, /* pc_relative */ |
| 808 | 0, /* bitpos */ |
| 809 | complain_overflow_dont,/* complain_on_overflow */ |
| 810 | bfd_elf_generic_reloc, /* special_function */ |
| 811 | "R_PPC_EMB_ADDR16_LO", /* name */ |
| 812 | false, /* partial_inplace */ |
| 813 | 0, /* src_mask */ |
| 814 | 0xffff, /* dst_mask */ |
| 815 | false), /* pcrel_offset */ |
| 816 | |
| 817 | /* The high order 16 bits of the addend minus the symbol */ |
| 818 | HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ |
| 819 | 16, /* rightshift */ |
| 820 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 821 | 16, /* bitsize */ |
| 822 | false, /* pc_relative */ |
| 823 | 0, /* bitpos */ |
| 824 | complain_overflow_dont, /* complain_on_overflow */ |
| 825 | bfd_elf_generic_reloc, /* special_function */ |
| 826 | "R_PPC_EMB_NADDR16_HI", /* name */ |
| 827 | false, /* partial_inplace */ |
| 828 | 0, /* src_mask */ |
| 829 | 0xffff, /* dst_mask */ |
| 830 | false), /* pcrel_offset */ |
| 831 | |
| 832 | /* The high order 16 bits of the result of the addend minus the address, |
| 833 | plus 1 if the contents of the low 16 bits, treated as a signed number, |
| 834 | is negative. */ |
| 835 | HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ |
| 836 | 16, /* rightshift */ |
| 837 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 838 | 16, /* bitsize */ |
| 839 | false, /* pc_relative */ |
| 840 | 0, /* bitpos */ |
| 841 | complain_overflow_dont, /* complain_on_overflow */ |
| 842 | bfd_elf_generic_reloc, /* special_function */ |
| 843 | "R_PPC_EMB_NADDR16_HA", /* name */ |
| 844 | false, /* partial_inplace */ |
| 845 | 0, /* src_mask */ |
| 846 | 0xffff, /* dst_mask */ |
| 847 | false), /* pcrel_offset */ |
| 848 | |
| 849 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 850 | address in the .sdata section, and returning the offset from |
| 851 | _SDA_BASE_ for that relocation */ |
| 852 | HOWTO (R_PPC_EMB_SDAI16, /* type */ |
| 853 | 0, /* rightshift */ |
| 854 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 855 | 16, /* bitsize */ |
| 856 | false, /* pc_relative */ |
| 857 | 0, /* bitpos */ |
| 858 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 859 | bfd_elf_generic_reloc, /* special_function */ |
| 860 | "R_PPC_EMB_SDAI16", /* name */ |
| 861 | false, /* partial_inplace */ |
| 862 | 0, /* src_mask */ |
| 863 | 0xffff, /* dst_mask */ |
| 864 | false), /* pcrel_offset */ |
| 865 | |
| 866 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 867 | address in the .sdata2 section, and returning the offset from |
| 868 | _SDA2_BASE_ for that relocation */ |
| 869 | HOWTO (R_PPC_EMB_SDA2I16, /* type */ |
| 870 | 0, /* rightshift */ |
| 871 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 872 | 16, /* bitsize */ |
| 873 | false, /* pc_relative */ |
| 874 | 0, /* bitpos */ |
| 875 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 876 | bfd_elf_generic_reloc, /* special_function */ |
| 877 | "R_PPC_EMB_SDA2I16", /* name */ |
| 878 | false, /* partial_inplace */ |
| 879 | 0, /* src_mask */ |
| 880 | 0xffff, /* dst_mask */ |
| 881 | false), /* pcrel_offset */ |
| 882 | |
| 883 | /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with |
| 884 | small data items. */ |
| 885 | HOWTO (R_PPC_EMB_SDA2REL, /* type */ |
| 886 | 0, /* rightshift */ |
| 887 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 888 | 16, /* bitsize */ |
| 889 | false, /* pc_relative */ |
| 890 | 0, /* bitpos */ |
| 891 | complain_overflow_signed, /* complain_on_overflow */ |
| 892 | bfd_elf_generic_reloc, /* special_function */ |
| 893 | "R_PPC_EMB_SDA2REL", /* name */ |
| 894 | false, /* partial_inplace */ |
| 895 | 0, /* src_mask */ |
| 896 | 0xffff, /* dst_mask */ |
| 897 | false), /* pcrel_offset */ |
| 898 | |
| 899 | /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit |
| 900 | signed offset from the appropriate base, and filling in the register |
| 901 | field with the appropriate register (0, 2, or 13). */ |
| 902 | HOWTO (R_PPC_EMB_SDA21, /* type */ |
| 903 | 0, /* rightshift */ |
| 904 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 905 | 16, /* bitsize */ |
| 906 | false, /* pc_relative */ |
| 907 | 0, /* bitpos */ |
| 908 | complain_overflow_signed, /* complain_on_overflow */ |
| 909 | bfd_elf_generic_reloc, /* special_function */ |
| 910 | "R_PPC_EMB_SDA21", /* name */ |
| 911 | false, /* partial_inplace */ |
| 912 | 0, /* src_mask */ |
| 913 | 0xffff, /* dst_mask */ |
| 914 | false), /* pcrel_offset */ |
| 915 | |
| 916 | /* Relocation not handled: R_PPC_EMB_MRKREF */ |
| 917 | /* Relocation not handled: R_PPC_EMB_RELSEC16 */ |
| 918 | /* Relocation not handled: R_PPC_EMB_RELST_LO */ |
| 919 | /* Relocation not handled: R_PPC_EMB_RELST_HI */ |
| 920 | /* Relocation not handled: R_PPC_EMB_RELST_HA */ |
| 921 | /* Relocation not handled: R_PPC_EMB_BIT_FLD */ |
| 922 | |
| 923 | /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling |
| 924 | in the 16 bit signed offset from the appropriate base, and filling in the |
| 925 | register field with the appropriate register (0, 2, or 13). */ |
| 926 | HOWTO (R_PPC_EMB_RELSDA, /* type */ |
| 927 | 0, /* rightshift */ |
| 928 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 929 | 16, /* bitsize */ |
| 930 | true, /* pc_relative */ |
| 931 | 0, /* bitpos */ |
| 932 | complain_overflow_signed, /* complain_on_overflow */ |
| 933 | bfd_elf_generic_reloc, /* special_function */ |
| 934 | "R_PPC_EMB_RELSDA", /* name */ |
| 935 | false, /* partial_inplace */ |
| 936 | 0, /* src_mask */ |
| 937 | 0xffff, /* dst_mask */ |
| 938 | false), /* pcrel_offset */ |
| 939 | |
| 940 | /* Phony reloc to handle AIX style TOC entries */ |
| 941 | HOWTO (R_PPC_TOC16, /* type */ |
| 942 | 0, /* rightshift */ |
| 943 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 944 | 16, /* bitsize */ |
| 945 | false, /* pc_relative */ |
| 946 | 0, /* bitpos */ |
| 947 | complain_overflow_signed, /* complain_on_overflow */ |
| 948 | bfd_elf_generic_reloc, /* special_function */ |
| 949 | "R_PPC_TOC16", /* name */ |
| 950 | false, /* partial_inplace */ |
| 951 | 0, /* src_mask */ |
| 952 | 0xffff, /* dst_mask */ |
| 953 | false), /* pcrel_offset */ |
| 954 | }; |
| 955 | |
| 956 | \f |
| 957 | /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ |
| 958 | |
| 959 | static void |
| 960 | ppc_elf_howto_init () |
| 961 | { |
| 962 | unsigned int i, type; |
| 963 | |
| 964 | for (i = 0; i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); i++) |
| 965 | { |
| 966 | type = ppc_elf_howto_raw[i].type; |
| 967 | BFD_ASSERT (type < sizeof(ppc_elf_howto_table) / sizeof(ppc_elf_howto_table[0])); |
| 968 | ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; |
| 969 | } |
| 970 | } |
| 971 | |
| 972 | \f |
| 973 | static reloc_howto_type * |
| 974 | ppc_elf_reloc_type_lookup (abfd, code) |
| 975 | bfd *abfd; |
| 976 | bfd_reloc_code_real_type code; |
| 977 | { |
| 978 | enum ppc_reloc_type ppc_reloc = R_PPC_NONE; |
| 979 | |
| 980 | if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */ |
| 981 | ppc_elf_howto_init (); |
| 982 | |
| 983 | switch ((int)code) |
| 984 | { |
| 985 | default: |
| 986 | return (reloc_howto_type *)NULL; |
| 987 | |
| 988 | case BFD_RELOC_NONE: ppc_reloc = R_PPC_NONE; break; |
| 989 | case BFD_RELOC_32: ppc_reloc = R_PPC_ADDR32; break; |
| 990 | case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC_ADDR24; break; |
| 991 | case BFD_RELOC_16: ppc_reloc = R_PPC_ADDR16; break; |
| 992 | case BFD_RELOC_LO16: ppc_reloc = R_PPC_ADDR16_LO; break; |
| 993 | case BFD_RELOC_HI16: ppc_reloc = R_PPC_ADDR16_HI; break; |
| 994 | case BFD_RELOC_HI16_S: ppc_reloc = R_PPC_ADDR16_HA; break; |
| 995 | case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC_ADDR14; break; |
| 996 | case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC_ADDR14_BRTAKEN; break; |
| 997 | case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC_ADDR14_BRNTAKEN; break; |
| 998 | case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC_REL24; break; |
| 999 | case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC_REL14; break; |
| 1000 | case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC_REL14_BRTAKEN; break; |
| 1001 | case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC_REL14_BRNTAKEN; break; |
| 1002 | case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC_GOT16; break; |
| 1003 | case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC_GOT16_LO; break; |
| 1004 | case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC_GOT16_HI; break; |
| 1005 | case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC_GOT16_HA; break; |
| 1006 | case BFD_RELOC_24_PLT_PCREL: ppc_reloc = R_PPC_PLTREL24; break; |
| 1007 | case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC_COPY; break; |
| 1008 | case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC_GLOB_DAT; break; |
| 1009 | case BFD_RELOC_PPC_LOCAL24PC: ppc_reloc = R_PPC_LOCAL24PC; break; |
| 1010 | case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC_REL32; break; |
| 1011 | case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC_PLT32; break; |
| 1012 | case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC_PLTREL32; break; |
| 1013 | case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC_PLT16_LO; break; |
| 1014 | case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC_PLT16_HI; break; |
| 1015 | case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC_PLT16_HA; break; |
| 1016 | case BFD_RELOC_GPREL16: ppc_reloc = R_PPC_SDAREL16; break; |
| 1017 | case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC_SECTOFF; break; |
| 1018 | case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC_SECTOFF_LO; break; |
| 1019 | case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC_SECTOFF_HI; break; |
| 1020 | case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC_SECTOFF_HA; break; |
| 1021 | case BFD_RELOC_CTOR: ppc_reloc = R_PPC_ADDR32; break; |
| 1022 | case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC_TOC16; break; |
| 1023 | case BFD_RELOC_PPC_EMB_NADDR32: ppc_reloc = R_PPC_EMB_NADDR32; break; |
| 1024 | case BFD_RELOC_PPC_EMB_NADDR16: ppc_reloc = R_PPC_EMB_NADDR16; break; |
| 1025 | case BFD_RELOC_PPC_EMB_NADDR16_LO: ppc_reloc = R_PPC_EMB_NADDR16_LO; break; |
| 1026 | case BFD_RELOC_PPC_EMB_NADDR16_HI: ppc_reloc = R_PPC_EMB_NADDR16_HI; break; |
| 1027 | case BFD_RELOC_PPC_EMB_NADDR16_HA: ppc_reloc = R_PPC_EMB_NADDR16_HA; break; |
| 1028 | case BFD_RELOC_PPC_EMB_SDAI16: ppc_reloc = R_PPC_EMB_SDAI16; break; |
| 1029 | case BFD_RELOC_PPC_EMB_SDA2I16: ppc_reloc = R_PPC_EMB_SDA2I16; break; |
| 1030 | case BFD_RELOC_PPC_EMB_SDA2REL: ppc_reloc = R_PPC_EMB_SDA2REL; break; |
| 1031 | case BFD_RELOC_PPC_EMB_SDA21: ppc_reloc = R_PPC_EMB_SDA21; break; |
| 1032 | case BFD_RELOC_PPC_EMB_MRKREF: ppc_reloc = R_PPC_EMB_MRKREF; break; |
| 1033 | case BFD_RELOC_PPC_EMB_RELSEC16: ppc_reloc = R_PPC_EMB_RELSEC16; break; |
| 1034 | case BFD_RELOC_PPC_EMB_RELST_LO: ppc_reloc = R_PPC_EMB_RELST_LO; break; |
| 1035 | case BFD_RELOC_PPC_EMB_RELST_HI: ppc_reloc = R_PPC_EMB_RELST_HI; break; |
| 1036 | case BFD_RELOC_PPC_EMB_RELST_HA: ppc_reloc = R_PPC_EMB_RELST_HA; break; |
| 1037 | case BFD_RELOC_PPC_EMB_BIT_FLD: ppc_reloc = R_PPC_EMB_BIT_FLD; break; |
| 1038 | case BFD_RELOC_PPC_EMB_RELSDA: ppc_reloc = R_PPC_EMB_RELSDA; break; |
| 1039 | } |
| 1040 | |
| 1041 | return ppc_elf_howto_table[ (int)ppc_reloc ]; |
| 1042 | }; |
| 1043 | |
| 1044 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
| 1045 | |
| 1046 | static void |
| 1047 | ppc_elf_info_to_howto (abfd, cache_ptr, dst) |
| 1048 | bfd *abfd; |
| 1049 | arelent *cache_ptr; |
| 1050 | Elf32_Internal_Rela *dst; |
| 1051 | { |
| 1052 | if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */ |
| 1053 | ppc_elf_howto_init (); |
| 1054 | |
| 1055 | BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); |
| 1056 | cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; |
| 1057 | } |
| 1058 | |
| 1059 | /* Handle the R_PPC_ADDR16_HA reloc. */ |
| 1060 | |
| 1061 | static bfd_reloc_status_type |
| 1062 | ppc_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section, |
| 1063 | output_bfd, error_message) |
| 1064 | bfd *abfd; |
| 1065 | arelent *reloc_entry; |
| 1066 | asymbol *symbol; |
| 1067 | PTR data; |
| 1068 | asection *input_section; |
| 1069 | bfd *output_bfd; |
| 1070 | char **error_message; |
| 1071 | { |
| 1072 | bfd_vma relocation; |
| 1073 | |
| 1074 | if (output_bfd != NULL) |
| 1075 | { |
| 1076 | reloc_entry->address += input_section->output_offset; |
| 1077 | return bfd_reloc_ok; |
| 1078 | } |
| 1079 | |
| 1080 | if (reloc_entry->address > input_section->_cooked_size) |
| 1081 | return bfd_reloc_outofrange; |
| 1082 | |
| 1083 | if (bfd_is_com_section (symbol->section)) |
| 1084 | relocation = 0; |
| 1085 | else |
| 1086 | relocation = symbol->value; |
| 1087 | |
| 1088 | relocation += symbol->section->output_section->vma; |
| 1089 | relocation += symbol->section->output_offset; |
| 1090 | relocation += reloc_entry->addend; |
| 1091 | |
| 1092 | reloc_entry->addend += (relocation & 0x8000) << 1; |
| 1093 | |
| 1094 | return bfd_reloc_continue; |
| 1095 | } |
| 1096 | |
| 1097 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
| 1098 | |
| 1099 | static boolean |
| 1100 | ppc_elf_set_private_flags (abfd, flags) |
| 1101 | bfd *abfd; |
| 1102 | flagword flags; |
| 1103 | { |
| 1104 | BFD_ASSERT (!elf_flags_init (abfd) |
| 1105 | || elf_elfheader (abfd)->e_flags == flags); |
| 1106 | |
| 1107 | elf_elfheader (abfd)->e_flags = flags; |
| 1108 | elf_flags_init (abfd) = true; |
| 1109 | return true; |
| 1110 | } |
| 1111 | |
| 1112 | /* Copy backend specific data from one object module to another */ |
| 1113 | static boolean |
| 1114 | ppc_elf_copy_private_bfd_data (ibfd, obfd) |
| 1115 | bfd *ibfd; |
| 1116 | bfd *obfd; |
| 1117 | { |
| 1118 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1119 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1120 | return true; |
| 1121 | |
| 1122 | BFD_ASSERT (!elf_flags_init (obfd) |
| 1123 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); |
| 1124 | |
| 1125 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; |
| 1126 | elf_flags_init (obfd) = true; |
| 1127 | return true; |
| 1128 | } |
| 1129 | |
| 1130 | /* Merge backend specific data from an object file to the output |
| 1131 | object file when linking */ |
| 1132 | static boolean |
| 1133 | ppc_elf_merge_private_bfd_data (ibfd, obfd) |
| 1134 | bfd *ibfd; |
| 1135 | bfd *obfd; |
| 1136 | { |
| 1137 | flagword old_flags; |
| 1138 | flagword new_flags; |
| 1139 | boolean error; |
| 1140 | |
| 1141 | /* Check if we have the same endianess */ |
| 1142 | if (ibfd->xvec->byteorder != obfd->xvec->byteorder |
| 1143 | && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) |
| 1144 | { |
| 1145 | (*_bfd_error_handler) |
| 1146 | ("%s: compiled for a %s endian system and target is %s endian", |
| 1147 | bfd_get_filename (ibfd), |
| 1148 | bfd_big_endian (ibfd) ? "big" : "little", |
| 1149 | bfd_big_endian (obfd) ? "big" : "little"); |
| 1150 | |
| 1151 | bfd_set_error (bfd_error_wrong_format); |
| 1152 | return false; |
| 1153 | } |
| 1154 | |
| 1155 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1156 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1157 | return true; |
| 1158 | |
| 1159 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 1160 | old_flags = elf_elfheader (obfd)->e_flags; |
| 1161 | if (!elf_flags_init (obfd)) /* First call, no flags set */ |
| 1162 | { |
| 1163 | elf_flags_init (obfd) = true; |
| 1164 | elf_elfheader (obfd)->e_flags = new_flags; |
| 1165 | } |
| 1166 | |
| 1167 | else if (new_flags == old_flags) /* Compatible flags are ok */ |
| 1168 | ; |
| 1169 | |
| 1170 | else /* Incompatible flags */ |
| 1171 | { |
| 1172 | /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked |
| 1173 | with either. */ |
| 1174 | error = false; |
| 1175 | if ((new_flags & EF_PPC_RELOCATABLE) != 0 |
| 1176 | && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) |
| 1177 | { |
| 1178 | error = true; |
| 1179 | (*_bfd_error_handler) |
| 1180 | ("%s: compiled with -mrelocatable and linked with modules compiled normally", |
| 1181 | bfd_get_filename (ibfd)); |
| 1182 | } |
| 1183 | else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 |
| 1184 | && (old_flags & EF_PPC_RELOCATABLE) != 0) |
| 1185 | { |
| 1186 | error = true; |
| 1187 | (*_bfd_error_handler) |
| 1188 | ("%s: compiled normally and linked with modules compiled with -mrelocatable", |
| 1189 | bfd_get_filename (ibfd)); |
| 1190 | } |
| 1191 | /* If -mrelocatable-lib is linked with an object without -mrelocatable-lib, turn off |
| 1192 | the -mrelocatable-lib, since at least one module isn't relocatable. */ |
| 1193 | else if ((old_flags & EF_PPC_RELOCATABLE_LIB) != 0 |
| 1194 | && (new_flags & EF_PPC_RELOCATABLE_LIB) == 0) |
| 1195 | elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; |
| 1196 | |
| 1197 | |
| 1198 | /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if any module uses it */ |
| 1199 | elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); |
| 1200 | |
| 1201 | new_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 1202 | old_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 1203 | |
| 1204 | /* Warn about any other mismatches */ |
| 1205 | if (new_flags != old_flags) |
| 1206 | { |
| 1207 | error = true; |
| 1208 | (*_bfd_error_handler) |
| 1209 | ("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)", |
| 1210 | bfd_get_filename (ibfd), (long)new_flags, (long)old_flags); |
| 1211 | } |
| 1212 | |
| 1213 | if (error) |
| 1214 | { |
| 1215 | bfd_set_error (bfd_error_bad_value); |
| 1216 | return false; |
| 1217 | } |
| 1218 | } |
| 1219 | |
| 1220 | return true; |
| 1221 | } |
| 1222 | |
| 1223 | \f |
| 1224 | /* Handle a PowerPC specific section when reading an object file. This |
| 1225 | is called when elfcode.h finds a section with an unknown type. */ |
| 1226 | |
| 1227 | static boolean |
| 1228 | ppc_elf_section_from_shdr (abfd, hdr, name) |
| 1229 | bfd *abfd; |
| 1230 | Elf32_Internal_Shdr *hdr; |
| 1231 | char *name; |
| 1232 | { |
| 1233 | asection *newsect; |
| 1234 | flagword flags; |
| 1235 | |
| 1236 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name)) |
| 1237 | return false; |
| 1238 | |
| 1239 | newsect = hdr->bfd_section; |
| 1240 | flags = bfd_get_section_flags (abfd, newsect); |
| 1241 | if (hdr->sh_flags & SHF_EXCLUDE) |
| 1242 | flags |= SEC_EXCLUDE; |
| 1243 | |
| 1244 | if (hdr->sh_type == SHT_ORDERED) |
| 1245 | flags |= SEC_SORT_ENTRIES; |
| 1246 | |
| 1247 | bfd_set_section_flags (abfd, newsect, flags); |
| 1248 | return true; |
| 1249 | } |
| 1250 | |
| 1251 | \f |
| 1252 | /* Set up any other section flags and such that may be necessary. */ |
| 1253 | |
| 1254 | static boolean |
| 1255 | ppc_elf_fake_sections (abfd, shdr, asect) |
| 1256 | bfd *abfd; |
| 1257 | Elf32_Internal_Shdr *shdr; |
| 1258 | asection *asect; |
| 1259 | { |
| 1260 | if ((asect->flags & SEC_EXCLUDE) != 0) |
| 1261 | shdr->sh_flags |= SHF_EXCLUDE; |
| 1262 | |
| 1263 | if ((asect->flags & SEC_SORT_ENTRIES) != 0) |
| 1264 | shdr->sh_type = SHT_ORDERED; |
| 1265 | |
| 1266 | return true; |
| 1267 | } |
| 1268 | |
| 1269 | \f |
| 1270 | /* Create a special linker section */ |
| 1271 | static elf_linker_section_t * |
| 1272 | ppc_elf_create_linker_section (abfd, info, which) |
| 1273 | bfd *abfd; |
| 1274 | struct bfd_link_info *info; |
| 1275 | enum elf_linker_section_enum which; |
| 1276 | { |
| 1277 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 1278 | elf_linker_section_t *lsect; |
| 1279 | |
| 1280 | /* Record the first bfd section that needs the special section */ |
| 1281 | if (!dynobj) |
| 1282 | dynobj = elf_hash_table (info)->dynobj = abfd; |
| 1283 | |
| 1284 | /* If this is the first time, create the section */ |
| 1285 | lsect = elf_linker_section (dynobj, which); |
| 1286 | if (!lsect) |
| 1287 | { |
| 1288 | elf_linker_section_t defaults; |
| 1289 | static elf_linker_section_t zero_section; |
| 1290 | |
| 1291 | defaults = zero_section; |
| 1292 | defaults.which = which; |
| 1293 | defaults.hole_written_p = false; |
| 1294 | defaults.alignment = 2; |
| 1295 | defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| 1296 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 1297 | |
| 1298 | switch (which) |
| 1299 | { |
| 1300 | default: |
| 1301 | (*_bfd_error_handler) ("%s: Unknown special linker type %d", |
| 1302 | bfd_get_filename (abfd), |
| 1303 | (int)which); |
| 1304 | |
| 1305 | bfd_set_error (bfd_error_bad_value); |
| 1306 | return (elf_linker_section_t *)0; |
| 1307 | |
| 1308 | case LINKER_SECTION_SDATA: /* .sdata/.sbss section */ |
| 1309 | defaults.name = ".sdata"; |
| 1310 | defaults.rel_name = ".rela.sdata"; |
| 1311 | defaults.bss_name = ".sbss"; |
| 1312 | defaults.sym_name = "_SDA_BASE_"; |
| 1313 | defaults.sym_offset = 32768; |
| 1314 | break; |
| 1315 | |
| 1316 | case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */ |
| 1317 | defaults.name = ".sdata2"; |
| 1318 | defaults.rel_name = ".rela.sdata2"; |
| 1319 | defaults.bss_name = ".sbss2"; |
| 1320 | defaults.sym_name = "_SDA2_BASE_"; |
| 1321 | defaults.sym_offset = 32768; |
| 1322 | defaults.flags |= SEC_READONLY; |
| 1323 | break; |
| 1324 | } |
| 1325 | |
| 1326 | lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults); |
| 1327 | } |
| 1328 | |
| 1329 | return lsect; |
| 1330 | } |
| 1331 | |
| 1332 | \f |
| 1333 | /* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we need to bump up |
| 1334 | the number of section headers. */ |
| 1335 | |
| 1336 | static int |
| 1337 | ppc_elf_additional_program_headers (abfd) |
| 1338 | bfd *abfd; |
| 1339 | { |
| 1340 | asection *s; |
| 1341 | int ret; |
| 1342 | |
| 1343 | ret = 0; |
| 1344 | |
| 1345 | s = bfd_get_section_by_name (abfd, ".interp"); |
| 1346 | if (s != NULL) |
| 1347 | ++ret; |
| 1348 | |
| 1349 | s = bfd_get_section_by_name (abfd, ".sbss2"); |
| 1350 | if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) |
| 1351 | ++ret; |
| 1352 | |
| 1353 | s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); |
| 1354 | if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0) |
| 1355 | ++ret; |
| 1356 | |
| 1357 | return ret; |
| 1358 | } |
| 1359 | |
| 1360 | /* Modify the segment map if needed */ |
| 1361 | |
| 1362 | static boolean |
| 1363 | ppc_elf_modify_segment_map (abfd) |
| 1364 | bfd *abfd; |
| 1365 | { |
| 1366 | return true; |
| 1367 | } |
| 1368 | \f |
| 1369 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1370 | regular object. The current definition is in some section of the |
| 1371 | dynamic object, but we're not including those sections. We have to |
| 1372 | change the definition to something the rest of the link can |
| 1373 | understand. */ |
| 1374 | |
| 1375 | static boolean |
| 1376 | ppc_elf_adjust_dynamic_symbol (info, h) |
| 1377 | struct bfd_link_info *info; |
| 1378 | struct elf_link_hash_entry *h; |
| 1379 | { |
| 1380 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 1381 | asection *s; |
| 1382 | unsigned int power_of_two; |
| 1383 | bfd_vma plt_offset; |
| 1384 | |
| 1385 | #ifdef DEBUG |
| 1386 | fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", h->root.root.string); |
| 1387 | #endif |
| 1388 | |
| 1389 | /* Make sure we know what is going on here. */ |
| 1390 | BFD_ASSERT (dynobj != NULL |
| 1391 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| 1392 | || h->weakdef != NULL |
| 1393 | || ((h->elf_link_hash_flags |
| 1394 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 1395 | && (h->elf_link_hash_flags |
| 1396 | & ELF_LINK_HASH_REF_REGULAR) != 0 |
| 1397 | && (h->elf_link_hash_flags |
| 1398 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| 1399 | |
| 1400 | |
| 1401 | /* If this is a function, put it in the procedure linkage table. We |
| 1402 | will fill in the contents of the procedure linkage table later, |
| 1403 | when we know the address of the .got section. */ |
| 1404 | if (h->type == STT_FUNC |
| 1405 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| 1406 | { |
| 1407 | if (! info->shared |
| 1408 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 |
| 1409 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0) |
| 1410 | { |
| 1411 | /* This case can occur if we saw a PLT32 reloc in an input |
| 1412 | file, but the symbol was never referred to by a dynamic |
| 1413 | object. In such a case, we don't actually need to build |
| 1414 | a procedure linkage table, and we can just do a PC32 |
| 1415 | reloc instead. */ |
| 1416 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); |
| 1417 | return true; |
| 1418 | } |
| 1419 | |
| 1420 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1421 | if (h->dynindx == -1) |
| 1422 | { |
| 1423 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 1424 | return false; |
| 1425 | } |
| 1426 | |
| 1427 | s = bfd_get_section_by_name (dynobj, ".plt"); |
| 1428 | BFD_ASSERT (s != NULL); |
| 1429 | |
| 1430 | /* If this is the first .plt entry, make room for the special |
| 1431 | first entry. */ |
| 1432 | if (s->_raw_size == 0) |
| 1433 | s->_raw_size += PLT_INITIAL_ENTRY_SIZE; |
| 1434 | |
| 1435 | /* The PowerPC PLT is actually composed of two parts, the first part |
| 1436 | is 2 words (for a load and a jump), and then there is a remaining |
| 1437 | word available at the end. */ |
| 1438 | plt_offset = (PLT_INITIAL_ENTRY_SIZE |
| 1439 | + 8 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE)); |
| 1440 | |
| 1441 | /* If this symbol is not defined in a regular file, and we are |
| 1442 | not generating a shared library, then set the symbol to this |
| 1443 | location in the .plt. This is required to make function |
| 1444 | pointers compare as equal between the normal executable and |
| 1445 | the shared library. */ |
| 1446 | if (! info->shared |
| 1447 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1448 | { |
| 1449 | h->root.u.def.section = s; |
| 1450 | h->root.u.def.value = plt_offset; |
| 1451 | } |
| 1452 | |
| 1453 | h->plt_offset = plt_offset; |
| 1454 | |
| 1455 | /* Make room for this entry. */ |
| 1456 | s->_raw_size += PLT_ENTRY_SIZE; |
| 1457 | |
| 1458 | /* We also need to make an entry in the .rela.plt section. */ |
| 1459 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 1460 | BFD_ASSERT (s != NULL); |
| 1461 | s->_raw_size += sizeof (Elf32_External_Rela); |
| 1462 | |
| 1463 | return true; |
| 1464 | } |
| 1465 | |
| 1466 | /* If this is a weak symbol, and there is a real definition, the |
| 1467 | processor independent code will have arranged for us to see the |
| 1468 | real definition first, and we can just use the same value. */ |
| 1469 | if (h->weakdef != NULL) |
| 1470 | { |
| 1471 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 1472 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 1473 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 1474 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 1475 | return true; |
| 1476 | } |
| 1477 | |
| 1478 | /* This is a reference to a symbol defined by a dynamic object which |
| 1479 | is not a function. */ |
| 1480 | |
| 1481 | /* If we are creating a shared library, we must presume that the |
| 1482 | only references to the symbol are via the global offset table. |
| 1483 | For such cases we need not do anything here; the relocations will |
| 1484 | be handled correctly by relocate_section. */ |
| 1485 | if (info->shared) |
| 1486 | return true; |
| 1487 | |
| 1488 | /* We must allocate the symbol in our .dynbss section, which will |
| 1489 | become part of the .bss section of the executable. There will be |
| 1490 | an entry for this symbol in the .dynsym section. The dynamic |
| 1491 | object will contain position independent code, so all references |
| 1492 | from the dynamic object to this symbol will go through the global |
| 1493 | offset table. The dynamic linker will use the .dynsym entry to |
| 1494 | determine the address it must put in the global offset table, so |
| 1495 | both the dynamic object and the regular object will refer to the |
| 1496 | same memory location for the variable. */ |
| 1497 | |
| 1498 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 1499 | BFD_ASSERT (s != NULL); |
| 1500 | |
| 1501 | /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to |
| 1502 | copy the initial value out of the dynamic object and into the |
| 1503 | runtime process image. We need to remember the offset into the |
| 1504 | .rela.bss section we are going to use. */ |
| 1505 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 1506 | { |
| 1507 | asection *srel; |
| 1508 | |
| 1509 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 1510 | BFD_ASSERT (srel != NULL); |
| 1511 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 1512 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 1513 | } |
| 1514 | |
| 1515 | /* We need to figure out the alignment required for this symbol. I |
| 1516 | have no idea how ELF linkers handle this. */ |
| 1517 | power_of_two = bfd_log2 (h->size); |
| 1518 | if (power_of_two > 3) |
| 1519 | power_of_two = 3; |
| 1520 | |
| 1521 | /* Apply the required alignment. */ |
| 1522 | s->_raw_size = BFD_ALIGN (s->_raw_size, |
| 1523 | (bfd_size_type) (1 << power_of_two)); |
| 1524 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 1525 | { |
| 1526 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 1527 | return false; |
| 1528 | } |
| 1529 | |
| 1530 | /* Define the symbol as being at this point in the section. */ |
| 1531 | h->root.u.def.section = s; |
| 1532 | h->root.u.def.value = s->_raw_size; |
| 1533 | |
| 1534 | /* Increment the section size to make room for the symbol. */ |
| 1535 | s->_raw_size += h->size; |
| 1536 | |
| 1537 | return true; |
| 1538 | } |
| 1539 | |
| 1540 | \f |
| 1541 | /* Increment the index of a dynamic symbol by a given amount. Called |
| 1542 | via elf_link_hash_traverse. */ |
| 1543 | |
| 1544 | static boolean |
| 1545 | ppc_elf_adjust_dynindx (h, cparg) |
| 1546 | struct elf_link_hash_entry *h; |
| 1547 | PTR cparg; |
| 1548 | { |
| 1549 | int *cp = (int *) cparg; |
| 1550 | |
| 1551 | #ifdef DEBUG |
| 1552 | fprintf (stderr, "ppc_elf_adjust_dynindx called, h->dynindx = %d, *cp = %d\n", h->dynindx, *cp); |
| 1553 | #endif |
| 1554 | |
| 1555 | if (h->dynindx != -1) |
| 1556 | h->dynindx += *cp; |
| 1557 | |
| 1558 | return true; |
| 1559 | } |
| 1560 | |
| 1561 | \f |
| 1562 | /* Set the sizes of the dynamic sections. */ |
| 1563 | |
| 1564 | static boolean |
| 1565 | ppc_elf_size_dynamic_sections (output_bfd, info) |
| 1566 | bfd *output_bfd; |
| 1567 | struct bfd_link_info *info; |
| 1568 | { |
| 1569 | bfd *dynobj; |
| 1570 | asection *s; |
| 1571 | boolean plt; |
| 1572 | boolean relocs; |
| 1573 | boolean reltext; |
| 1574 | |
| 1575 | #ifdef DEBUG |
| 1576 | fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); |
| 1577 | #endif |
| 1578 | |
| 1579 | dynobj = elf_hash_table (info)->dynobj; |
| 1580 | BFD_ASSERT (dynobj != NULL); |
| 1581 | |
| 1582 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1583 | { |
| 1584 | /* Set the contents of the .interp section to the interpreter. */ |
| 1585 | if (! info->shared) |
| 1586 | { |
| 1587 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 1588 | BFD_ASSERT (s != NULL); |
| 1589 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 1590 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 1591 | } |
| 1592 | } |
| 1593 | else |
| 1594 | { |
| 1595 | /* We may have created entries in the .rela.got, .rela.sdata, and |
| 1596 | .rela.sdata2 sections. However, if we are not creating the |
| 1597 | dynamic sections, we will not actually use these entries. Reset |
| 1598 | the size of .rela.got, et al, which will cause it to get |
| 1599 | stripped from the output file below. */ |
| 1600 | static char *rela_sections[] = { ".rela.got", ".rela.sdata", ".rela.sdata", (char *)0 }; |
| 1601 | char **p; |
| 1602 | |
| 1603 | for (p = rela_sections; *p != (char *)0; p++) |
| 1604 | { |
| 1605 | s = bfd_get_section_by_name (dynobj, *p); |
| 1606 | if (s != NULL) |
| 1607 | s->_raw_size = 0; |
| 1608 | } |
| 1609 | } |
| 1610 | |
| 1611 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 1612 | determined the sizes of the various dynamic sections. Allocate |
| 1613 | memory for them. */ |
| 1614 | plt = false; |
| 1615 | relocs = false; |
| 1616 | reltext = false; |
| 1617 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 1618 | { |
| 1619 | const char *name; |
| 1620 | boolean strip; |
| 1621 | |
| 1622 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 1623 | continue; |
| 1624 | |
| 1625 | /* It's OK to base decisions on the section name, because none |
| 1626 | of the dynobj section names depend upon the input files. */ |
| 1627 | name = bfd_get_section_name (dynobj, s); |
| 1628 | |
| 1629 | strip = false; |
| 1630 | |
| 1631 | if (strcmp (name, ".plt") == 0) |
| 1632 | { |
| 1633 | if (s->_raw_size == 0) |
| 1634 | { |
| 1635 | /* Strip this section if we don't need it; see the |
| 1636 | comment below. */ |
| 1637 | strip = true; |
| 1638 | } |
| 1639 | else |
| 1640 | { |
| 1641 | /* Remember whether there is a PLT. */ |
| 1642 | plt = true; |
| 1643 | } |
| 1644 | } |
| 1645 | else if (strncmp (name, ".rela", 5) == 0) |
| 1646 | { |
| 1647 | if (s->_raw_size == 0) |
| 1648 | { |
| 1649 | /* If we don't need this section, strip it from the |
| 1650 | output file. This is mostly to handle .rela.bss and |
| 1651 | .rela.plt. We must create both sections in |
| 1652 | create_dynamic_sections, because they must be created |
| 1653 | before the linker maps input sections to output |
| 1654 | sections. The linker does that before |
| 1655 | adjust_dynamic_symbol is called, and it is that |
| 1656 | function which decides whether anything needs to go |
| 1657 | into these sections. */ |
| 1658 | strip = true; |
| 1659 | } |
| 1660 | else |
| 1661 | { |
| 1662 | asection *target; |
| 1663 | const char *outname; |
| 1664 | |
| 1665 | /* Remember whether there are any relocation sections. */ |
| 1666 | relocs = true; |
| 1667 | |
| 1668 | /* If this relocation section applies to a read only |
| 1669 | section, then we probably need a DT_TEXTREL entry. */ |
| 1670 | outname = bfd_get_section_name (output_bfd, |
| 1671 | s->output_section); |
| 1672 | target = bfd_get_section_by_name (output_bfd, outname + 5); |
| 1673 | if (target != NULL |
| 1674 | && (target->flags & SEC_READONLY) != 0) |
| 1675 | reltext = true; |
| 1676 | |
| 1677 | /* We use the reloc_count field as a counter if we need |
| 1678 | to copy relocs into the output file. */ |
| 1679 | s->reloc_count = 0; |
| 1680 | } |
| 1681 | } |
| 1682 | else if (strcmp (name, ".got") != 0 |
| 1683 | && strcmp (name, ".sdata") != 0 |
| 1684 | && strcmp (name, ".sdata2") != 0) |
| 1685 | { |
| 1686 | /* It's not one of our sections, so don't allocate space. */ |
| 1687 | continue; |
| 1688 | } |
| 1689 | |
| 1690 | if (strip) |
| 1691 | { |
| 1692 | asection **spp; |
| 1693 | |
| 1694 | for (spp = &s->output_section->owner->sections; |
| 1695 | *spp != s->output_section; |
| 1696 | spp = &(*spp)->next) |
| 1697 | ; |
| 1698 | *spp = s->output_section->next; |
| 1699 | --s->output_section->owner->section_count; |
| 1700 | |
| 1701 | continue; |
| 1702 | } |
| 1703 | |
| 1704 | /* Allocate memory for the section contents. */ |
| 1705 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| 1706 | if (s->contents == NULL && s->_raw_size != 0) |
| 1707 | return false; |
| 1708 | } |
| 1709 | |
| 1710 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1711 | { |
| 1712 | /* Add some entries to the .dynamic section. We fill in the |
| 1713 | values later, in ppc_elf_finish_dynamic_sections, but we |
| 1714 | must add the entries now so that we get the correct size for |
| 1715 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 1716 | dynamic linker and used by the debugger. */ |
| 1717 | if (! info->shared) |
| 1718 | { |
| 1719 | if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) |
| 1720 | return false; |
| 1721 | } |
| 1722 | |
| 1723 | if (plt) |
| 1724 | { |
| 1725 | if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) |
| 1726 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| 1727 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA) |
| 1728 | || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) |
| 1729 | return false; |
| 1730 | } |
| 1731 | |
| 1732 | if (relocs) |
| 1733 | { |
| 1734 | if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0) |
| 1735 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0) |
| 1736 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT, |
| 1737 | sizeof (Elf32_External_Rela))) |
| 1738 | return false; |
| 1739 | } |
| 1740 | |
| 1741 | if (reltext) |
| 1742 | { |
| 1743 | if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) |
| 1744 | return false; |
| 1745 | } |
| 1746 | } |
| 1747 | |
| 1748 | /* If we are generating a shared library, we generate a section |
| 1749 | symbol for each output section. These are local symbols, which |
| 1750 | means that they must come first in the dynamic symbol table. |
| 1751 | That means we must increment the dynamic symbol index of every |
| 1752 | other dynamic symbol. |
| 1753 | |
| 1754 | FIXME: We assume that there will never be relocations to |
| 1755 | locations in linker-created sections that do not have |
| 1756 | externally-visible names. Instead, we should work out precisely |
| 1757 | which sections relocations are targetted at. */ |
| 1758 | if (info->shared) |
| 1759 | { |
| 1760 | int c, i; |
| 1761 | |
| 1762 | for (c = 0, s = output_bfd->sections; s != NULL; s = s->next) |
| 1763 | { |
| 1764 | if ((s->flags & SEC_LINKER_CREATED) != 0) |
| 1765 | continue; |
| 1766 | c++; |
| 1767 | } |
| 1768 | |
| 1769 | elf_link_hash_traverse (elf_hash_table (info), |
| 1770 | ppc_elf_adjust_dynindx, |
| 1771 | (PTR) &c); |
| 1772 | elf_hash_table (info)->dynsymcount += c; |
| 1773 | |
| 1774 | for (i = 1, s = output_bfd->sections; s != NULL; s = s->next) |
| 1775 | { |
| 1776 | if ((s->flags & SEC_LINKER_CREATED) != 0) |
| 1777 | elf_section_data (s)->dynindx = -1; |
| 1778 | else |
| 1779 | { |
| 1780 | elf_section_data (s)->dynindx = i; |
| 1781 | /* These symbols will have no names, so we don't need to |
| 1782 | fiddle with dynstr_index. */ |
| 1783 | i++; |
| 1784 | } |
| 1785 | } |
| 1786 | |
| 1787 | BFD_ASSERT(i == c + 1); |
| 1788 | } |
| 1789 | |
| 1790 | return true; |
| 1791 | } |
| 1792 | |
| 1793 | \f |
| 1794 | /* Look through the relocs for a section during the first phase, and |
| 1795 | allocate space in the global offset table or procedure linkage |
| 1796 | table. */ |
| 1797 | |
| 1798 | static boolean |
| 1799 | ppc_elf_check_relocs (abfd, info, sec, relocs) |
| 1800 | bfd *abfd; |
| 1801 | struct bfd_link_info *info; |
| 1802 | asection *sec; |
| 1803 | const Elf_Internal_Rela *relocs; |
| 1804 | { |
| 1805 | boolean ret = true; |
| 1806 | bfd *dynobj; |
| 1807 | Elf_Internal_Shdr *symtab_hdr; |
| 1808 | struct elf_link_hash_entry **sym_hashes; |
| 1809 | const Elf_Internal_Rela *rel; |
| 1810 | const Elf_Internal_Rela *rel_end; |
| 1811 | bfd_vma *local_got_offsets; |
| 1812 | elf_linker_section_t *sdata; |
| 1813 | elf_linker_section_t *sdata2; |
| 1814 | asection *sreloc; |
| 1815 | asection *sgot; |
| 1816 | asection *srelgot = NULL; |
| 1817 | |
| 1818 | if (info->relocateable) |
| 1819 | return true; |
| 1820 | |
| 1821 | #ifdef DEBUG |
| 1822 | fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n", |
| 1823 | bfd_get_section_name (abfd, sec), |
| 1824 | bfd_get_filename (abfd)); |
| 1825 | #endif |
| 1826 | |
| 1827 | /* Create the linker generated sections all the time so that the |
| 1828 | special symbols are created. */ |
| 1829 | |
| 1830 | if ((sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA)) == NULL) |
| 1831 | { |
| 1832 | sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA); |
| 1833 | if (!sdata) |
| 1834 | ret = false; |
| 1835 | } |
| 1836 | |
| 1837 | |
| 1838 | if ((sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2)) == NULL) |
| 1839 | { |
| 1840 | sdata2 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA2); |
| 1841 | if (!sdata2) |
| 1842 | ret = false; |
| 1843 | } |
| 1844 | |
| 1845 | dynobj = elf_hash_table (info)->dynobj; |
| 1846 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1847 | sym_hashes = elf_sym_hashes (abfd); |
| 1848 | local_got_offsets = elf_local_got_offsets (abfd); |
| 1849 | |
| 1850 | /* FIXME: We should only create the .got section if we need it. |
| 1851 | Otherwise we waste space in a statically linked executable. */ |
| 1852 | |
| 1853 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 1854 | return false; |
| 1855 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1856 | BFD_ASSERT (sgot != NULL); |
| 1857 | |
| 1858 | sreloc = NULL; |
| 1859 | |
| 1860 | rel_end = relocs + sec->reloc_count; |
| 1861 | for (rel = relocs; rel < rel_end; rel++) |
| 1862 | { |
| 1863 | unsigned long r_symndx; |
| 1864 | struct elf_link_hash_entry *h; |
| 1865 | |
| 1866 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1867 | if (r_symndx < symtab_hdr->sh_info) |
| 1868 | h = NULL; |
| 1869 | else |
| 1870 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1871 | |
| 1872 | switch (ELF32_R_TYPE (rel->r_info)) |
| 1873 | { |
| 1874 | /* GOT16 relocations */ |
| 1875 | case R_PPC_GOT16: |
| 1876 | case R_PPC_GOT16_LO: |
| 1877 | case R_PPC_GOT16_HI: |
| 1878 | case R_PPC_GOT16_HA: |
| 1879 | if (srelgot == NULL |
| 1880 | && (h != NULL || info->shared)) |
| 1881 | { |
| 1882 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1883 | if (srelgot == NULL) |
| 1884 | { |
| 1885 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 1886 | if (srelgot == NULL |
| 1887 | || ! bfd_set_section_flags (dynobj, srelgot, |
| 1888 | (SEC_ALLOC |
| 1889 | | SEC_LOAD |
| 1890 | | SEC_HAS_CONTENTS |
| 1891 | | SEC_IN_MEMORY |
| 1892 | | SEC_LINKER_CREATED |
| 1893 | | SEC_READONLY)) |
| 1894 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 1895 | return false; |
| 1896 | } |
| 1897 | } |
| 1898 | |
| 1899 | if (h != NULL) |
| 1900 | { |
| 1901 | if (h->got_offset != (bfd_vma) -1) |
| 1902 | { |
| 1903 | /* We have already allocated space in the .got. */ |
| 1904 | break; |
| 1905 | } |
| 1906 | h->got_offset = sgot->_raw_size; |
| 1907 | |
| 1908 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 1909 | if (h->dynindx == -1) |
| 1910 | { |
| 1911 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 1912 | return false; |
| 1913 | } |
| 1914 | |
| 1915 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 1916 | } |
| 1917 | else |
| 1918 | { |
| 1919 | /* This is a global offset table entry for a local |
| 1920 | symbol. */ |
| 1921 | if (local_got_offsets == NULL) |
| 1922 | { |
| 1923 | size_t size; |
| 1924 | register unsigned int i; |
| 1925 | |
| 1926 | size = symtab_hdr->sh_info * sizeof (bfd_vma); |
| 1927 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
| 1928 | if (local_got_offsets == NULL) |
| 1929 | return false; |
| 1930 | elf_local_got_offsets (abfd) = local_got_offsets; |
| 1931 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 1932 | local_got_offsets[i] = (bfd_vma) -1; |
| 1933 | } |
| 1934 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
| 1935 | { |
| 1936 | /* We have already allocated space in the .got. */ |
| 1937 | break; |
| 1938 | } |
| 1939 | local_got_offsets[r_symndx] = sgot->_raw_size; |
| 1940 | |
| 1941 | if (info->shared) |
| 1942 | { |
| 1943 | /* If we are generating a shared object, we need to |
| 1944 | output a R_PPC_RELATIVE reloc so that the |
| 1945 | dynamic linker can adjust this GOT entry. */ |
| 1946 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | sgot->_raw_size += 4; |
| 1951 | |
| 1952 | break; |
| 1953 | |
| 1954 | /* Indirect .sdata relocation */ |
| 1955 | case R_PPC_EMB_SDAI16: |
| 1956 | if (info->shared) |
| 1957 | { |
| 1958 | (*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object", |
| 1959 | bfd_get_filename (abfd), |
| 1960 | "R_PPC_EMB_SDAI16"); |
| 1961 | ret = false; |
| 1962 | break; |
| 1963 | } |
| 1964 | |
| 1965 | if (srelgot == NULL |
| 1966 | && (h != NULL || info->shared)) |
| 1967 | { |
| 1968 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1969 | if (srelgot == NULL) |
| 1970 | { |
| 1971 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 1972 | if (srelgot == NULL |
| 1973 | || ! bfd_set_section_flags (dynobj, srelgot, |
| 1974 | (SEC_ALLOC |
| 1975 | | SEC_LOAD |
| 1976 | | SEC_HAS_CONTENTS |
| 1977 | | SEC_IN_MEMORY |
| 1978 | | SEC_LINKER_CREATED |
| 1979 | | SEC_READONLY)) |
| 1980 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 1981 | return false; |
| 1982 | } |
| 1983 | } |
| 1984 | |
| 1985 | if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata, h, rel)) |
| 1986 | ret = false; |
| 1987 | |
| 1988 | break; |
| 1989 | |
| 1990 | /* Indirect .sdata2 relocation */ |
| 1991 | case R_PPC_EMB_SDA2I16: |
| 1992 | if (info->shared) |
| 1993 | { |
| 1994 | (*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object", |
| 1995 | bfd_get_filename (abfd), |
| 1996 | "R_PPC_EMB_SDA2I16"); |
| 1997 | ret = false; |
| 1998 | break; |
| 1999 | } |
| 2000 | |
| 2001 | if (srelgot == NULL |
| 2002 | && (h != NULL || info->shared)) |
| 2003 | { |
| 2004 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2005 | if (srelgot == NULL) |
| 2006 | { |
| 2007 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 2008 | if (srelgot == NULL |
| 2009 | || ! bfd_set_section_flags (dynobj, srelgot, |
| 2010 | (SEC_ALLOC |
| 2011 | | SEC_LOAD |
| 2012 | | SEC_HAS_CONTENTS |
| 2013 | | SEC_IN_MEMORY |
| 2014 | | SEC_LINKER_CREATED |
| 2015 | | SEC_READONLY)) |
| 2016 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 2017 | return false; |
| 2018 | } |
| 2019 | } |
| 2020 | |
| 2021 | if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata2, h, rel)) |
| 2022 | return false; |
| 2023 | |
| 2024 | break; |
| 2025 | |
| 2026 | case R_PPC_SDAREL16: |
| 2027 | case R_PPC_EMB_SDA2REL: |
| 2028 | case R_PPC_EMB_SDA21: |
| 2029 | if (info->shared) |
| 2030 | { |
| 2031 | (*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object", |
| 2032 | bfd_get_filename (abfd), |
| 2033 | ppc_elf_howto_table[(int)ELF32_R_TYPE (rel->r_info)]->name); |
| 2034 | ret = false; |
| 2035 | } |
| 2036 | break; |
| 2037 | |
| 2038 | case R_PPC_PLT32: |
| 2039 | case R_PPC_PLTREL24: |
| 2040 | case R_PPC_PLT16_LO: |
| 2041 | case R_PPC_PLT16_HI: |
| 2042 | case R_PPC_PLT16_HA: |
| 2043 | #ifdef DEBUG |
| 2044 | fprintf (stderr, "Reloc requires a PLT entry\n"); |
| 2045 | #endif |
| 2046 | /* This symbol requires a procedure linkage table entry. We |
| 2047 | actually build the entry in adjust_dynamic_symbol, |
| 2048 | because this might be a case of linking PIC code without |
| 2049 | linking in any dynamic objects, in which case we don't |
| 2050 | need to generate a procedure linkage table after all. */ |
| 2051 | |
| 2052 | if (h == NULL) |
| 2053 | { |
| 2054 | /* It does not make sense to have a procedure linkage |
| 2055 | table entry for a local symbol. */ |
| 2056 | bfd_set_error (bfd_error_bad_value); |
| 2057 | ret = false; |
| 2058 | break; |
| 2059 | } |
| 2060 | |
| 2061 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 2062 | if (h->dynindx == -1) |
| 2063 | { |
| 2064 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 2065 | { |
| 2066 | ret = false; |
| 2067 | break; |
| 2068 | } |
| 2069 | } |
| 2070 | |
| 2071 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 2072 | break; |
| 2073 | |
| 2074 | /* The following relocations don't need to propagate the |
| 2075 | relocation if linking a shared object since they are |
| 2076 | section relative. */ |
| 2077 | case R_PPC_SECTOFF: |
| 2078 | case R_PPC_SECTOFF_LO: |
| 2079 | case R_PPC_SECTOFF_HI: |
| 2080 | case R_PPC_SECTOFF_HA: |
| 2081 | break; |
| 2082 | |
| 2083 | /* This refers only to functions defined in the shared library */ |
| 2084 | case R_PPC_LOCAL24PC: |
| 2085 | break; |
| 2086 | |
| 2087 | /* When creating a shared object, we must copy these |
| 2088 | relocs into the output file. We create a reloc |
| 2089 | section in dynobj and make room for the reloc. */ |
| 2090 | case R_PPC_REL24: |
| 2091 | if (h != NULL |
| 2092 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2093 | break; |
| 2094 | /* fall through */ |
| 2095 | |
| 2096 | case R_PPC_REL14: |
| 2097 | case R_PPC_REL14_BRTAKEN: |
| 2098 | case R_PPC_REL14_BRNTAKEN: |
| 2099 | if (h == NULL) |
| 2100 | break; |
| 2101 | /* fall through */ |
| 2102 | |
| 2103 | default: |
| 2104 | if (info->shared) |
| 2105 | { |
| 2106 | #ifdef DEBUG |
| 2107 | fprintf (stderr, "ppc_elf_check_relocs need to create relocation for %s\n", |
| 2108 | (h && h->root.root.string) ? h->root.root.string : "<unknown>"); |
| 2109 | #endif |
| 2110 | if (sreloc == NULL) |
| 2111 | { |
| 2112 | const char *name; |
| 2113 | |
| 2114 | name = (bfd_elf_string_from_elf_section |
| 2115 | (abfd, |
| 2116 | elf_elfheader (abfd)->e_shstrndx, |
| 2117 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 2118 | if (name == NULL) |
| 2119 | { |
| 2120 | ret = false; |
| 2121 | break; |
| 2122 | } |
| 2123 | |
| 2124 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 2125 | && strcmp (bfd_get_section_name (abfd, sec), |
| 2126 | name + 5) == 0); |
| 2127 | |
| 2128 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 2129 | if (sreloc == NULL) |
| 2130 | { |
| 2131 | sreloc = bfd_make_section (dynobj, name); |
| 2132 | if (sreloc == NULL |
| 2133 | || ! bfd_set_section_flags (dynobj, sreloc, |
| 2134 | (SEC_ALLOC |
| 2135 | | SEC_LOAD |
| 2136 | | SEC_HAS_CONTENTS |
| 2137 | | SEC_IN_MEMORY |
| 2138 | | SEC_LINKER_CREATED |
| 2139 | | SEC_READONLY)) |
| 2140 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) |
| 2141 | { |
| 2142 | ret = false; |
| 2143 | break; |
| 2144 | } |
| 2145 | } |
| 2146 | } |
| 2147 | |
| 2148 | sreloc->_raw_size += sizeof (Elf32_External_Rela); |
| 2149 | } |
| 2150 | |
| 2151 | break; |
| 2152 | } |
| 2153 | } |
| 2154 | |
| 2155 | return ret; |
| 2156 | } |
| 2157 | |
| 2158 | \f |
| 2159 | /* Hook called by the linker routine which adds symbols from an object |
| 2160 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 2161 | |
| 2162 | /*ARGSUSED*/ |
| 2163 | static boolean |
| 2164 | ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| 2165 | bfd *abfd; |
| 2166 | struct bfd_link_info *info; |
| 2167 | const Elf_Internal_Sym *sym; |
| 2168 | const char **namep; |
| 2169 | flagword *flagsp; |
| 2170 | asection **secp; |
| 2171 | bfd_vma *valp; |
| 2172 | { |
| 2173 | if (sym->st_shndx == SHN_COMMON && !info->relocateable && sym->st_size <= bfd_get_gp_size (abfd)) |
| 2174 | { |
| 2175 | /* Common symbols less than or equal to -G nn bytes are automatically |
| 2176 | put into .sdata. */ |
| 2177 | elf_linker_section_t *sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA); |
| 2178 | if (!sdata->bss_section) |
| 2179 | { |
| 2180 | /* We don't go through bfd_make_section, because we don't |
| 2181 | want to attach this common section to DYNOBJ. The linker |
| 2182 | will move the symbols to the appropriate output section |
| 2183 | when it defines common symbols. */ |
| 2184 | sdata->bss_section = ((asection *) |
| 2185 | bfd_zalloc (abfd, sizeof (asection))); |
| 2186 | if (sdata->bss_section == NULL) |
| 2187 | return false; |
| 2188 | sdata->bss_section->name = sdata->bss_name; |
| 2189 | sdata->bss_section->flags = SEC_IS_COMMON; |
| 2190 | sdata->bss_section->output_section = sdata->bss_section; |
| 2191 | sdata->bss_section->symbol = |
| 2192 | (asymbol *) bfd_zalloc (abfd, sizeof (asymbol)); |
| 2193 | sdata->bss_section->symbol_ptr_ptr = |
| 2194 | (asymbol **) bfd_zalloc (abfd, sizeof (asymbol *)); |
| 2195 | if (sdata->bss_section->symbol == NULL |
| 2196 | || sdata->bss_section->symbol_ptr_ptr == NULL) |
| 2197 | return false; |
| 2198 | sdata->bss_section->symbol->name = sdata->bss_name; |
| 2199 | sdata->bss_section->symbol->flags = BSF_SECTION_SYM; |
| 2200 | sdata->bss_section->symbol->section = sdata->bss_section; |
| 2201 | *sdata->bss_section->symbol_ptr_ptr = sdata->bss_section->symbol; |
| 2202 | } |
| 2203 | |
| 2204 | *secp = sdata->bss_section; |
| 2205 | *valp = sym->st_size; |
| 2206 | } |
| 2207 | |
| 2208 | return true; |
| 2209 | } |
| 2210 | |
| 2211 | \f |
| 2212 | /* Finish up dynamic symbol handling. We set the contents of various |
| 2213 | dynamic sections here. */ |
| 2214 | |
| 2215 | static boolean |
| 2216 | ppc_elf_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 2217 | bfd *output_bfd; |
| 2218 | struct bfd_link_info *info; |
| 2219 | struct elf_link_hash_entry *h; |
| 2220 | Elf_Internal_Sym *sym; |
| 2221 | { |
| 2222 | bfd *dynobj; |
| 2223 | |
| 2224 | #ifdef DEBUG |
| 2225 | fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", h->root.root.string); |
| 2226 | #endif |
| 2227 | |
| 2228 | dynobj = elf_hash_table (info)->dynobj; |
| 2229 | BFD_ASSERT (dynobj != NULL); |
| 2230 | |
| 2231 | if (h->plt_offset != (bfd_vma) -1) |
| 2232 | { |
| 2233 | asection *splt; |
| 2234 | asection *srela; |
| 2235 | Elf_Internal_Rela rela; |
| 2236 | |
| 2237 | #ifdef DEBUG |
| 2238 | fprintf (stderr, ", plt_offset = %d", h->plt_offset); |
| 2239 | #endif |
| 2240 | |
| 2241 | /* This symbol has an entry in the procedure linkage table. Set |
| 2242 | it up. */ |
| 2243 | |
| 2244 | BFD_ASSERT (h->dynindx != -1); |
| 2245 | |
| 2246 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2247 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 2248 | BFD_ASSERT (splt != NULL && srela != NULL); |
| 2249 | |
| 2250 | /* We don't need to fill in the .plt. The ppc dynamic linker |
| 2251 | will fill it in. */ |
| 2252 | |
| 2253 | /* Fill in the entry in the .rela.plt section. */ |
| 2254 | rela.r_offset = (splt->output_section->vma |
| 2255 | + splt->output_offset |
| 2256 | + h->plt_offset); |
| 2257 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); |
| 2258 | rela.r_addend = 0; |
| 2259 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 2260 | ((Elf32_External_Rela *) srela->contents |
| 2261 | + ((h->plt_offset - PLT_INITIAL_ENTRY_SIZE) / 8))); |
| 2262 | |
| 2263 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 2264 | { |
| 2265 | /* Mark the symbol as undefined, rather than as defined in |
| 2266 | the .plt section. Leave the value alone. */ |
| 2267 | sym->st_shndx = SHN_UNDEF; |
| 2268 | } |
| 2269 | } |
| 2270 | |
| 2271 | if (h->got_offset != (bfd_vma) -1) |
| 2272 | { |
| 2273 | asection *sgot; |
| 2274 | asection *srela; |
| 2275 | Elf_Internal_Rela rela; |
| 2276 | |
| 2277 | /* This symbol has an entry in the global offset table. Set it |
| 2278 | up. */ |
| 2279 | |
| 2280 | BFD_ASSERT (h->dynindx != -1); |
| 2281 | |
| 2282 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2283 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2284 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 2285 | |
| 2286 | rela.r_offset = (sgot->output_section->vma |
| 2287 | + sgot->output_offset |
| 2288 | + (h->got_offset &~ 1)); |
| 2289 | |
| 2290 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 2291 | locally, we just want to emit a RELATIVE reloc. The entry in |
| 2292 | the global offset table will already have been initialized in |
| 2293 | the relocate_section function. */ |
| 2294 | if (info->shared |
| 2295 | && info->symbolic |
| 2296 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 2297 | rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 2298 | else |
| 2299 | { |
| 2300 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got_offset); |
| 2301 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_GLOB_DAT); |
| 2302 | } |
| 2303 | |
| 2304 | rela.r_addend = 0; |
| 2305 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 2306 | ((Elf32_External_Rela *) srela->contents |
| 2307 | + srela->reloc_count)); |
| 2308 | ++srela->reloc_count; |
| 2309 | } |
| 2310 | |
| 2311 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 2312 | { |
| 2313 | asection *s; |
| 2314 | Elf_Internal_Rela rela; |
| 2315 | |
| 2316 | /* This symbols needs a copy reloc. Set it up. */ |
| 2317 | |
| 2318 | #ifdef DEBUG |
| 2319 | fprintf (stderr, ", copy"); |
| 2320 | #endif |
| 2321 | |
| 2322 | BFD_ASSERT (h->dynindx != -1); |
| 2323 | |
| 2324 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 2325 | ".rela.bss"); |
| 2326 | BFD_ASSERT (s != NULL); |
| 2327 | |
| 2328 | rela.r_offset = (h->root.u.def.value |
| 2329 | + h->root.u.def.section->output_section->vma |
| 2330 | + h->root.u.def.section->output_offset); |
| 2331 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); |
| 2332 | rela.r_addend = 0; |
| 2333 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 2334 | ((Elf32_External_Rela *) s->contents |
| 2335 | + s->reloc_count)); |
| 2336 | ++s->reloc_count; |
| 2337 | } |
| 2338 | |
| 2339 | #ifdef DEBUG |
| 2340 | fprintf (stderr, "\n"); |
| 2341 | #endif |
| 2342 | |
| 2343 | /* Mark some specially defined symbols as absolute. */ |
| 2344 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 2345 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| 2346 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| 2347 | sym->st_shndx = SHN_ABS; |
| 2348 | |
| 2349 | return true; |
| 2350 | } |
| 2351 | |
| 2352 | \f |
| 2353 | /* Finish up the dynamic sections. */ |
| 2354 | |
| 2355 | static boolean |
| 2356 | ppc_elf_finish_dynamic_sections (output_bfd, info) |
| 2357 | bfd *output_bfd; |
| 2358 | struct bfd_link_info *info; |
| 2359 | { |
| 2360 | asection *sdyn; |
| 2361 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 2362 | asection *sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2363 | |
| 2364 | #ifdef DEBUG |
| 2365 | fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); |
| 2366 | #endif |
| 2367 | |
| 2368 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 2369 | |
| 2370 | if (elf_hash_table (info)->dynamic_sections_created) |
| 2371 | { |
| 2372 | asection *splt; |
| 2373 | Elf32_External_Dyn *dyncon, *dynconend; |
| 2374 | |
| 2375 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2376 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 2377 | |
| 2378 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 2379 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 2380 | for (; dyncon < dynconend; dyncon++) |
| 2381 | { |
| 2382 | Elf_Internal_Dyn dyn; |
| 2383 | const char *name; |
| 2384 | boolean size; |
| 2385 | |
| 2386 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 2387 | |
| 2388 | switch (dyn.d_tag) |
| 2389 | { |
| 2390 | case DT_PLTGOT: name = ".plt"; size = false; break; |
| 2391 | case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; |
| 2392 | case DT_JMPREL: name = ".rela.plt"; size = false; break; |
| 2393 | default: name = NULL; size = false; break; |
| 2394 | } |
| 2395 | |
| 2396 | if (name != NULL) |
| 2397 | { |
| 2398 | asection *s; |
| 2399 | |
| 2400 | s = bfd_get_section_by_name (output_bfd, name); |
| 2401 | if (s == NULL) |
| 2402 | dyn.d_un.d_val = 0; |
| 2403 | else |
| 2404 | { |
| 2405 | if (! size) |
| 2406 | dyn.d_un.d_ptr = s->vma; |
| 2407 | else |
| 2408 | { |
| 2409 | if (s->_cooked_size != 0) |
| 2410 | dyn.d_un.d_val = s->_cooked_size; |
| 2411 | else |
| 2412 | dyn.d_un.d_val = s->_raw_size; |
| 2413 | } |
| 2414 | } |
| 2415 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2416 | } |
| 2417 | } |
| 2418 | } |
| 2419 | |
| 2420 | /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can |
| 2421 | easily find the address of the _GLOBAL_OFFSET_TABLE_. */ |
| 2422 | if (sgot) |
| 2423 | { |
| 2424 | unsigned char *contents = sgot->contents; |
| 2425 | bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents); |
| 2426 | |
| 2427 | if (sdyn == NULL) |
| 2428 | bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4); |
| 2429 | else |
| 2430 | bfd_put_32 (output_bfd, |
| 2431 | sdyn->output_section->vma + sdyn->output_offset, |
| 2432 | contents+4); |
| 2433 | |
| 2434 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 2435 | } |
| 2436 | |
| 2437 | if (info->shared) |
| 2438 | { |
| 2439 | asection *sdynsym; |
| 2440 | asection *s; |
| 2441 | Elf_Internal_Sym sym; |
| 2442 | int maxdindx = 0; |
| 2443 | |
| 2444 | /* Set up the section symbols for the output sections. */ |
| 2445 | |
| 2446 | sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); |
| 2447 | BFD_ASSERT (sdynsym != NULL); |
| 2448 | |
| 2449 | sym.st_size = 0; |
| 2450 | sym.st_name = 0; |
| 2451 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); |
| 2452 | sym.st_other = 0; |
| 2453 | |
| 2454 | for (s = output_bfd->sections; s != NULL; s = s->next) |
| 2455 | { |
| 2456 | int indx, dindx; |
| 2457 | |
| 2458 | sym.st_value = s->vma; |
| 2459 | |
| 2460 | indx = elf_section_data (s)->this_idx; |
| 2461 | dindx = elf_section_data (s)->dynindx; |
| 2462 | if (dindx != -1) |
| 2463 | { |
| 2464 | BFD_ASSERT(indx > 0); |
| 2465 | BFD_ASSERT(dindx > 0); |
| 2466 | |
| 2467 | if (dindx > maxdindx) |
| 2468 | maxdindx = dindx; |
| 2469 | |
| 2470 | sym.st_shndx = indx; |
| 2471 | |
| 2472 | bfd_elf32_swap_symbol_out (output_bfd, &sym, |
| 2473 | (PTR) (((Elf32_External_Sym *) |
| 2474 | sdynsym->contents) |
| 2475 | + dindx)); |
| 2476 | } |
| 2477 | } |
| 2478 | |
| 2479 | /* Set the sh_info field of the output .dynsym section to the |
| 2480 | index of the first global symbol. */ |
| 2481 | elf_section_data (sdynsym->output_section)->this_hdr.sh_info = |
| 2482 | maxdindx + 1; |
| 2483 | } |
| 2484 | |
| 2485 | return true; |
| 2486 | } |
| 2487 | |
| 2488 | \f |
| 2489 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 2490 | to handle the relocations for a section. |
| 2491 | |
| 2492 | The relocs are always passed as Rela structures; if the section |
| 2493 | actually uses Rel structures, the r_addend field will always be |
| 2494 | zero. |
| 2495 | |
| 2496 | This function is responsible for adjust the section contents as |
| 2497 | necessary, and (if using Rela relocs and generating a |
| 2498 | relocateable output file) adjusting the reloc addend as |
| 2499 | necessary. |
| 2500 | |
| 2501 | This function does not have to worry about setting the reloc |
| 2502 | address or the reloc symbol index. |
| 2503 | |
| 2504 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 2505 | |
| 2506 | LOCAL_SECTIONS is an array giving the section in the input file |
| 2507 | corresponding to the st_shndx field of each local symbol. |
| 2508 | |
| 2509 | The global hash table entry for the global symbols can be found |
| 2510 | via elf_sym_hashes (input_bfd). |
| 2511 | |
| 2512 | When generating relocateable output, this function must handle |
| 2513 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 2514 | going to be the section symbol corresponding to the output |
| 2515 | section, which means that the addend must be adjusted |
| 2516 | accordingly. */ |
| 2517 | |
| 2518 | static boolean |
| 2519 | ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| 2520 | contents, relocs, local_syms, local_sections) |
| 2521 | bfd *output_bfd; |
| 2522 | struct bfd_link_info *info; |
| 2523 | bfd *input_bfd; |
| 2524 | asection *input_section; |
| 2525 | bfd_byte *contents; |
| 2526 | Elf_Internal_Rela *relocs; |
| 2527 | Elf_Internal_Sym *local_syms; |
| 2528 | asection **local_sections; |
| 2529 | { |
| 2530 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 2531 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| 2532 | bfd *dynobj = elf_hash_table (info)->dynobj; |
| 2533 | elf_linker_section_t *sdata = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA) : NULL; |
| 2534 | elf_linker_section_t *sdata2 = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA2) : NULL; |
| 2535 | Elf_Internal_Rela *rel = relocs; |
| 2536 | Elf_Internal_Rela *relend = relocs + input_section->reloc_count; |
| 2537 | asection *sreloc = NULL; |
| 2538 | asection *splt = NULL; |
| 2539 | asection *sgot = NULL; |
| 2540 | bfd_vma *local_got_offsets; |
| 2541 | boolean ret = true; |
| 2542 | long insn; |
| 2543 | |
| 2544 | #ifdef DEBUG |
| 2545 | fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n", |
| 2546 | bfd_get_filename (input_bfd), |
| 2547 | bfd_section_name(input_bfd, input_section), |
| 2548 | (long)input_section->reloc_count, |
| 2549 | (info->relocateable) ? " (relocatable)" : ""); |
| 2550 | #endif |
| 2551 | |
| 2552 | if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */ |
| 2553 | ppc_elf_howto_init (); |
| 2554 | |
| 2555 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 2556 | |
| 2557 | for (; rel < relend; rel++) |
| 2558 | { |
| 2559 | enum ppc_reloc_type r_type = (enum ppc_reloc_type)ELF32_R_TYPE (rel->r_info); |
| 2560 | bfd_vma offset = rel->r_offset; |
| 2561 | bfd_vma addend = rel->r_addend; |
| 2562 | bfd_reloc_status_type r = bfd_reloc_other; |
| 2563 | Elf_Internal_Sym *sym = (Elf_Internal_Sym *)0; |
| 2564 | asection *sec = (asection *)0; |
| 2565 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *)0; |
| 2566 | const char *sym_name = (const char *)0; |
| 2567 | reloc_howto_type *howto; |
| 2568 | unsigned long r_symndx; |
| 2569 | bfd_vma relocation; |
| 2570 | |
| 2571 | /* Unknown relocation handling */ |
| 2572 | if ((unsigned)r_type >= (unsigned)R_PPC_max || !ppc_elf_howto_table[(int)r_type]) |
| 2573 | { |
| 2574 | (*_bfd_error_handler) ("%s: unknown relocation type %d", |
| 2575 | bfd_get_filename (input_bfd), |
| 2576 | (int)r_type); |
| 2577 | |
| 2578 | bfd_set_error (bfd_error_bad_value); |
| 2579 | ret = false; |
| 2580 | continue; |
| 2581 | } |
| 2582 | |
| 2583 | howto = ppc_elf_howto_table[(int)r_type]; |
| 2584 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2585 | |
| 2586 | if (info->relocateable) |
| 2587 | { |
| 2588 | /* This is a relocateable link. We don't have to change |
| 2589 | anything, unless the reloc is against a section symbol, |
| 2590 | in which case we have to adjust according to where the |
| 2591 | section symbol winds up in the output section. */ |
| 2592 | if (r_symndx < symtab_hdr->sh_info) |
| 2593 | { |
| 2594 | sym = local_syms + r_symndx; |
| 2595 | if ((unsigned)ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 2596 | { |
| 2597 | sec = local_sections[r_symndx]; |
| 2598 | addend = rel->r_addend += sec->output_offset + sym->st_value; |
| 2599 | } |
| 2600 | } |
| 2601 | |
| 2602 | #ifdef DEBUG |
| 2603 | fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n", |
| 2604 | howto->name, |
| 2605 | (int)r_type, |
| 2606 | r_symndx, |
| 2607 | (long)offset, |
| 2608 | (long)addend); |
| 2609 | #endif |
| 2610 | continue; |
| 2611 | } |
| 2612 | |
| 2613 | /* This is a final link. */ |
| 2614 | if (r_symndx < symtab_hdr->sh_info) |
| 2615 | { |
| 2616 | sym = local_syms + r_symndx; |
| 2617 | sec = local_sections[r_symndx]; |
| 2618 | sym_name = "<local symbol>"; |
| 2619 | |
| 2620 | relocation = (sec->output_section->vma |
| 2621 | + sec->output_offset |
| 2622 | + sym->st_value); |
| 2623 | } |
| 2624 | else |
| 2625 | { |
| 2626 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2627 | while (h->root.type == bfd_link_hash_indirect |
| 2628 | || h->root.type == bfd_link_hash_warning) |
| 2629 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2630 | sym_name = h->root.root.string; |
| 2631 | if (h->root.type == bfd_link_hash_defined |
| 2632 | || h->root.type == bfd_link_hash_defweak) |
| 2633 | { |
| 2634 | sec = h->root.u.def.section; |
| 2635 | if ((r_type == R_PPC_PLT32 |
| 2636 | && h->plt_offset != (bfd_vma) -1) |
| 2637 | || ((r_type == R_PPC_GOT16 |
| 2638 | || r_type == R_PPC_GOT16_LO |
| 2639 | || r_type == R_PPC_GOT16_HI |
| 2640 | || r_type == R_PPC_GOT16_HA) |
| 2641 | && elf_hash_table (info)->dynamic_sections_created |
| 2642 | && (! info->shared |
| 2643 | || ! info->symbolic |
| 2644 | || (h->elf_link_hash_flags |
| 2645 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 2646 | || (info->shared |
| 2647 | && (! info->symbolic |
| 2648 | || (h->elf_link_hash_flags |
| 2649 | & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 2650 | && (input_section->flags & SEC_ALLOC) != 0 |
| 2651 | && (r_type == R_PPC_ADDR32 |
| 2652 | || r_type == R_PPC_ADDR24 |
| 2653 | || r_type == R_PPC_ADDR16 |
| 2654 | || r_type == R_PPC_ADDR16_LO |
| 2655 | || r_type == R_PPC_ADDR16_HI |
| 2656 | || r_type == R_PPC_ADDR16_HA |
| 2657 | || r_type == R_PPC_ADDR14 |
| 2658 | || r_type == R_PPC_ADDR14_BRTAKEN |
| 2659 | || r_type == R_PPC_ADDR14_BRNTAKEN |
| 2660 | || r_type == R_PPC_PLTREL24 |
| 2661 | || r_type == R_PPC_COPY |
| 2662 | || r_type == R_PPC_GLOB_DAT |
| 2663 | || r_type == R_PPC_JMP_SLOT |
| 2664 | || r_type == R_PPC_UADDR32 |
| 2665 | || r_type == R_PPC_UADDR16 |
| 2666 | || r_type == R_PPC_REL32 |
| 2667 | || r_type == R_PPC_SDAREL16 |
| 2668 | || r_type == R_PPC_EMB_NADDR32 |
| 2669 | || r_type == R_PPC_EMB_NADDR16 |
| 2670 | || r_type == R_PPC_EMB_NADDR16_LO |
| 2671 | || r_type == R_PPC_EMB_NADDR16_HI |
| 2672 | || r_type == R_PPC_EMB_NADDR16_HA |
| 2673 | || r_type == R_PPC_EMB_SDAI16 |
| 2674 | || r_type == R_PPC_EMB_SDA2I16 |
| 2675 | || r_type == R_PPC_EMB_SDA2REL |
| 2676 | || r_type == R_PPC_EMB_SDA21 |
| 2677 | || r_type == R_PPC_EMB_MRKREF |
| 2678 | || r_type == R_PPC_EMB_BIT_FLD |
| 2679 | || r_type == R_PPC_EMB_RELSDA |
| 2680 | || ((r_type == R_PPC_REL24 |
| 2681 | || r_type == R_PPC_REL14 |
| 2682 | || r_type == R_PPC_REL14_BRTAKEN |
| 2683 | || r_type == R_PPC_REL14_BRNTAKEN |
| 2684 | || r_type == R_PPC_RELATIVE) |
| 2685 | && strcmp (h->root.root.string, |
| 2686 | "_GLOBAL_OFFSET_TABLE_") != 0)))) |
| 2687 | { |
| 2688 | /* In these cases, we don't need the relocation |
| 2689 | value. We check specially because in some |
| 2690 | obscure cases sec->output_section will be NULL. */ |
| 2691 | relocation = 0; |
| 2692 | } |
| 2693 | else |
| 2694 | relocation = (h->root.u.def.value |
| 2695 | + sec->output_section->vma |
| 2696 | + sec->output_offset); |
| 2697 | } |
| 2698 | else if (h->root.type == bfd_link_hash_undefweak) |
| 2699 | relocation = 0; |
| 2700 | else if (info->shared) |
| 2701 | relocation = 0; |
| 2702 | else |
| 2703 | { |
| 2704 | (*info->callbacks->undefined_symbol)(info, |
| 2705 | h->root.root.string, |
| 2706 | input_bfd, |
| 2707 | input_section, |
| 2708 | rel->r_offset); |
| 2709 | ret = false; |
| 2710 | continue; |
| 2711 | } |
| 2712 | } |
| 2713 | |
| 2714 | switch ((int)r_type) |
| 2715 | { |
| 2716 | default: |
| 2717 | (*_bfd_error_handler) ("%s: unknown relocation type %d for symbol %s", |
| 2718 | bfd_get_filename (input_bfd), |
| 2719 | (int)r_type, sym_name); |
| 2720 | |
| 2721 | bfd_set_error (bfd_error_bad_value); |
| 2722 | ret = false; |
| 2723 | continue; |
| 2724 | |
| 2725 | /* relocations that need no special processing */ |
| 2726 | case (int)R_PPC_LOCAL24PC: |
| 2727 | break; |
| 2728 | |
| 2729 | case (int)R_PPC_REL24: |
| 2730 | case (int)R_PPC_REL14: |
| 2731 | if (h == NULL |
| 2732 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2733 | break; |
| 2734 | /* fall through */ |
| 2735 | |
| 2736 | /* Relocations that need to be propagated if this is a shared |
| 2737 | object. */ |
| 2738 | case (int)R_PPC_NONE: |
| 2739 | case (int)R_PPC_ADDR32: |
| 2740 | case (int)R_PPC_ADDR24: |
| 2741 | case (int)R_PPC_ADDR16: |
| 2742 | case (int)R_PPC_ADDR16_LO: |
| 2743 | case (int)R_PPC_ADDR16_HI: |
| 2744 | case (int)R_PPC_ADDR16_HA: |
| 2745 | case (int)R_PPC_ADDR14: |
| 2746 | case (int)R_PPC_UADDR32: |
| 2747 | case (int)R_PPC_UADDR16: |
| 2748 | case (int)R_PPC_REL32: |
| 2749 | if (info->shared) |
| 2750 | { |
| 2751 | Elf_Internal_Rela outrel; |
| 2752 | boolean skip; |
| 2753 | |
| 2754 | #ifdef DEBUG |
| 2755 | fprintf (stderr, "ppc_elf_relocate_section need to create relocation for %s\n", |
| 2756 | (h && h->root.root.string) ? h->root.root.string : "<unknown>"); |
| 2757 | #endif |
| 2758 | |
| 2759 | /* When generating a shared object, these relocations |
| 2760 | are copied into the output file to be resolved at run |
| 2761 | time. */ |
| 2762 | |
| 2763 | if (sreloc == NULL) |
| 2764 | { |
| 2765 | const char *name; |
| 2766 | |
| 2767 | name = (bfd_elf_string_from_elf_section |
| 2768 | (input_bfd, |
| 2769 | elf_elfheader (input_bfd)->e_shstrndx, |
| 2770 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 2771 | if (name == NULL) |
| 2772 | return false; |
| 2773 | |
| 2774 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 2775 | && strcmp (bfd_get_section_name (input_bfd, |
| 2776 | input_section), |
| 2777 | name + 5) == 0); |
| 2778 | |
| 2779 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 2780 | BFD_ASSERT (sreloc != NULL); |
| 2781 | } |
| 2782 | |
| 2783 | skip = false; |
| 2784 | |
| 2785 | if (elf_section_data (input_section)->stab_info == NULL) |
| 2786 | outrel.r_offset = rel->r_offset; |
| 2787 | else |
| 2788 | { |
| 2789 | bfd_vma off; |
| 2790 | |
| 2791 | off = (_bfd_stab_section_offset |
| 2792 | (output_bfd, &elf_hash_table (info)->stab_info, |
| 2793 | input_section, |
| 2794 | &elf_section_data (input_section)->stab_info, |
| 2795 | rel->r_offset)); |
| 2796 | if (off == (bfd_vma) -1) |
| 2797 | skip = true; |
| 2798 | outrel.r_offset = off; |
| 2799 | } |
| 2800 | |
| 2801 | outrel.r_offset += (input_section->output_section->vma |
| 2802 | + input_section->output_offset); |
| 2803 | |
| 2804 | if (skip) |
| 2805 | memset (&outrel, 0, sizeof outrel); |
| 2806 | /* h->dynindx may be -1 if this symbol was marked to |
| 2807 | become local. */ |
| 2808 | else if (h != NULL |
| 2809 | && ((! info->symbolic && h->dynindx != -1) |
| 2810 | || (h->elf_link_hash_flags |
| 2811 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 2812 | { |
| 2813 | BFD_ASSERT (h->dynindx != -1); |
| 2814 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 2815 | outrel.r_addend = rel->r_addend; |
| 2816 | } |
| 2817 | else |
| 2818 | { |
| 2819 | if (r_type == R_PPC_ADDR32) |
| 2820 | { |
| 2821 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 2822 | outrel.r_addend = relocation + rel->r_addend; |
| 2823 | } |
| 2824 | else |
| 2825 | { |
| 2826 | long indx; |
| 2827 | |
| 2828 | if (h == NULL) |
| 2829 | sec = local_sections[r_symndx]; |
| 2830 | else |
| 2831 | { |
| 2832 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
| 2833 | || (h->root.type |
| 2834 | == bfd_link_hash_defweak)); |
| 2835 | sec = h->root.u.def.section; |
| 2836 | } |
| 2837 | if (sec != NULL && bfd_is_abs_section (sec)) |
| 2838 | indx = 0; |
| 2839 | else if (sec == NULL || sec->owner == NULL) |
| 2840 | { |
| 2841 | bfd_set_error (bfd_error_bad_value); |
| 2842 | return false; |
| 2843 | } |
| 2844 | else |
| 2845 | { |
| 2846 | asection *osec; |
| 2847 | |
| 2848 | osec = sec->output_section; |
| 2849 | indx = elf_section_data (osec)->dynindx; |
| 2850 | BFD_ASSERT(indx > 0); |
| 2851 | } |
| 2852 | |
| 2853 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 2854 | outrel.r_addend = relocation + rel->r_addend; |
| 2855 | } |
| 2856 | } |
| 2857 | |
| 2858 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 2859 | (((Elf32_External_Rela *) |
| 2860 | sreloc->contents) |
| 2861 | + sreloc->reloc_count)); |
| 2862 | ++sreloc->reloc_count; |
| 2863 | |
| 2864 | /* This reloc will be computed at runtime, so there's no |
| 2865 | need to do anything now, unless this is a RELATIVE |
| 2866 | reloc in an unallocated section. */ |
| 2867 | if (skip |
| 2868 | || (input_section->flags & SEC_ALLOC) != 0 |
| 2869 | || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE) |
| 2870 | continue; |
| 2871 | } |
| 2872 | |
| 2873 | /* Arithmetic adjust relocations that aren't going into a |
| 2874 | shared object. */ |
| 2875 | if (r_type == R_PPC_ADDR16_HA |
| 2876 | /* It's just possible that this symbol is a weak symbol |
| 2877 | that's not actually defined anywhere. In that case, |
| 2878 | 'sec' would be NULL, and we should leave the symbol |
| 2879 | alone (it will be set to zero elsewhere in the link). */ |
| 2880 | && sec != NULL) |
| 2881 | { |
| 2882 | addend += ((relocation + addend) & 0x8000) << 1; |
| 2883 | } |
| 2884 | break; |
| 2885 | |
| 2886 | /* branch taken prediction relocations */ |
| 2887 | case (int)R_PPC_ADDR14_BRTAKEN: |
| 2888 | case (int)R_PPC_REL14_BRTAKEN: |
| 2889 | insn = bfd_get_32 (output_bfd, contents + offset); |
| 2890 | if ((relocation - offset) & 0x8000) |
| 2891 | insn &= ~BRANCH_PREDICT_BIT; |
| 2892 | else |
| 2893 | insn |= BRANCH_PREDICT_BIT; |
| 2894 | bfd_put_32 (output_bfd, insn, contents + offset); |
| 2895 | break; |
| 2896 | |
| 2897 | /* branch not taken predicition relocations */ |
| 2898 | case (int)R_PPC_ADDR14_BRNTAKEN: |
| 2899 | case (int)R_PPC_REL14_BRNTAKEN: |
| 2900 | insn = bfd_get_32 (output_bfd, contents + offset); |
| 2901 | if ((relocation - offset) & 0x8000) |
| 2902 | insn |= BRANCH_PREDICT_BIT; |
| 2903 | else |
| 2904 | insn &= ~BRANCH_PREDICT_BIT; |
| 2905 | bfd_put_32 (output_bfd, insn, contents + offset); |
| 2906 | break; |
| 2907 | |
| 2908 | /* GOT16 relocations */ |
| 2909 | case (int)R_PPC_GOT16: |
| 2910 | case (int)R_PPC_GOT16_LO: |
| 2911 | case (int)R_PPC_GOT16_HI: |
| 2912 | case (int)R_PPC_GOT16_HA: |
| 2913 | /* Relocation is to the entry for this symbol in the global |
| 2914 | offset table. */ |
| 2915 | if (sgot == NULL) |
| 2916 | { |
| 2917 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2918 | BFD_ASSERT (sgot != NULL); |
| 2919 | } |
| 2920 | |
| 2921 | if (h != NULL) |
| 2922 | { |
| 2923 | bfd_vma off; |
| 2924 | |
| 2925 | off = h->got_offset; |
| 2926 | BFD_ASSERT (off != (bfd_vma) -1); |
| 2927 | |
| 2928 | if (! elf_hash_table (info)->dynamic_sections_created |
| 2929 | || (info->shared |
| 2930 | && info->symbolic |
| 2931 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
| 2932 | { |
| 2933 | /* This is actually a static link, or it is a |
| 2934 | -Bsymbolic link and the symbol is defined |
| 2935 | locally. We must initialize this entry in the |
| 2936 | global offset table. Since the offset must |
| 2937 | always be a multiple of 4, we use the least |
| 2938 | significant bit to record whether we have |
| 2939 | initialized it already. |
| 2940 | |
| 2941 | When doing a dynamic link, we create a .rela.got |
| 2942 | relocation entry to initialize the value. This |
| 2943 | is done in the finish_dynamic_symbol routine. */ |
| 2944 | if ((off & 1) != 0) |
| 2945 | off &= ~1; |
| 2946 | else |
| 2947 | { |
| 2948 | bfd_put_32 (output_bfd, relocation + addend, |
| 2949 | sgot->contents + off); |
| 2950 | h->got_offset |= 1; |
| 2951 | } |
| 2952 | } |
| 2953 | |
| 2954 | relocation = sgot->output_offset + off - 4; |
| 2955 | addend = 0; |
| 2956 | } |
| 2957 | else |
| 2958 | { |
| 2959 | bfd_vma off; |
| 2960 | |
| 2961 | BFD_ASSERT (local_got_offsets != NULL |
| 2962 | && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 2963 | |
| 2964 | off = local_got_offsets[r_symndx]; |
| 2965 | |
| 2966 | /* The offset must always be a multiple of 4. We use |
| 2967 | the least significant bit to record whether we have |
| 2968 | already processed this entry. */ |
| 2969 | if ((off & 1) != 0) |
| 2970 | off &= ~1; |
| 2971 | else |
| 2972 | { |
| 2973 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 2974 | |
| 2975 | if (info->shared) |
| 2976 | { |
| 2977 | asection *srelgot; |
| 2978 | Elf_Internal_Rela outrel; |
| 2979 | |
| 2980 | /* We need to generate a R_PPC_RELATIVE reloc |
| 2981 | for the dynamic linker. */ |
| 2982 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 2983 | BFD_ASSERT (srelgot != NULL); |
| 2984 | |
| 2985 | outrel.r_offset = (sgot->output_section->vma |
| 2986 | + sgot->output_offset |
| 2987 | + off); |
| 2988 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 2989 | outrel.r_addend = relocation + addend; |
| 2990 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 2991 | (((Elf32_External_Rela *) |
| 2992 | srelgot->contents) |
| 2993 | + srelgot->reloc_count)); |
| 2994 | ++srelgot->reloc_count; |
| 2995 | } |
| 2996 | |
| 2997 | local_got_offsets[r_symndx] |= 1; |
| 2998 | } |
| 2999 | |
| 3000 | relocation = sgot->output_offset + off - 4; |
| 3001 | addend = 0; |
| 3002 | } |
| 3003 | |
| 3004 | break; |
| 3005 | |
| 3006 | /* Indirect .sdata relocation */ |
| 3007 | case (int)R_PPC_EMB_SDAI16: |
| 3008 | BFD_ASSERT (sdata != NULL); |
| 3009 | relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info, |
| 3010 | sdata, h, relocation, rel, |
| 3011 | R_PPC_RELATIVE); |
| 3012 | break; |
| 3013 | |
| 3014 | /* Indirect .sdata2 relocation */ |
| 3015 | case (int)R_PPC_EMB_SDA2I16: |
| 3016 | BFD_ASSERT (sdata2 != NULL); |
| 3017 | relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info, |
| 3018 | sdata2, h, relocation, rel, |
| 3019 | R_PPC_RELATIVE); |
| 3020 | break; |
| 3021 | |
| 3022 | /* Handle the TOC16 reloc. We want to use the offset within the .got |
| 3023 | section, not the actual VMA. This is appropriate when generating |
| 3024 | an embedded ELF object, for which the .got section acts like the |
| 3025 | AIX .toc section. */ |
| 3026 | case (int)R_PPC_TOC16: /* phony GOT16 relocations */ |
| 3027 | BFD_ASSERT (sec != (asection *)0); |
| 3028 | BFD_ASSERT (bfd_is_und_section (sec) |
| 3029 | || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0 |
| 3030 | || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0) |
| 3031 | |
| 3032 | addend -= sec->output_section->vma + sec->output_offset + 0x8000; |
| 3033 | break; |
| 3034 | |
| 3035 | case (int)R_PPC_PLTREL24: |
| 3036 | /* Relocation is to the entry for this symbol in the |
| 3037 | procedure linkage table. */ |
| 3038 | BFD_ASSERT (h != NULL); |
| 3039 | |
| 3040 | if (h->plt_offset == (bfd_vma) -1) |
| 3041 | { |
| 3042 | /* We didn't make a PLT entry for this symbol. This |
| 3043 | happens when statically linking PIC code, or when |
| 3044 | using -Bsymbolic. */ |
| 3045 | break; |
| 3046 | } |
| 3047 | |
| 3048 | if (splt == NULL) |
| 3049 | { |
| 3050 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 3051 | BFD_ASSERT (splt != NULL); |
| 3052 | } |
| 3053 | |
| 3054 | relocation = (splt->output_section->vma |
| 3055 | + splt->output_offset |
| 3056 | + h->plt_offset); |
| 3057 | break; |
| 3058 | |
| 3059 | /* relocate against _SDA_BASE_ */ |
| 3060 | case (int)R_PPC_SDAREL16: |
| 3061 | BFD_ASSERT (sec != (asection *)0); |
| 3062 | if (strcmp (bfd_get_section_name (abfd, sec), ".sdata") != 0 |
| 3063 | && strcmp (bfd_get_section_name (abfd, sec), ".sbss") != 0) |
| 3064 | { |
| 3065 | (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)", |
| 3066 | bfd_get_filename (input_bfd), |
| 3067 | sym_name, |
| 3068 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 3069 | bfd_get_section_name (abfd, sec)); |
| 3070 | |
| 3071 | bfd_set_error (bfd_error_bad_value); |
| 3072 | ret = false; |
| 3073 | continue; |
| 3074 | } |
| 3075 | addend -= (sdata->sym_hash->root.u.def.value |
| 3076 | + sdata->sym_hash->root.u.def.section->output_section->vma |
| 3077 | + sdata->sym_hash->root.u.def.section->output_offset); |
| 3078 | break; |
| 3079 | |
| 3080 | |
| 3081 | /* relocate against _SDA2_BASE_ */ |
| 3082 | case (int)R_PPC_EMB_SDA2REL: |
| 3083 | BFD_ASSERT (sec != (asection *)0); |
| 3084 | if (strcmp (bfd_get_section_name (abfd, sec), ".sdata2") != 0 |
| 3085 | && strcmp (bfd_get_section_name (abfd, sec), ".sbss2") != 0) |
| 3086 | { |
| 3087 | (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)", |
| 3088 | bfd_get_filename (input_bfd), |
| 3089 | sym_name, |
| 3090 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 3091 | bfd_get_section_name (abfd, sec)); |
| 3092 | |
| 3093 | bfd_set_error (bfd_error_bad_value); |
| 3094 | ret = false; |
| 3095 | continue; |
| 3096 | } |
| 3097 | addend -= (sdata2->sym_hash->root.u.def.value |
| 3098 | + sdata2->sym_hash->root.u.def.section->output_section->vma |
| 3099 | + sdata2->sym_hash->root.u.def.section->output_offset); |
| 3100 | break; |
| 3101 | |
| 3102 | |
| 3103 | /* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */ |
| 3104 | case (int)R_PPC_EMB_SDA21: |
| 3105 | case (int)R_PPC_EMB_RELSDA: |
| 3106 | { |
| 3107 | const char *name = bfd_get_section_name (abfd, sec); |
| 3108 | int reg; |
| 3109 | |
| 3110 | BFD_ASSERT (sec != (asection *)0); |
| 3111 | if (strcmp (name, ".sdata") == 0 || strcmp (name, ".sbss") == 0) |
| 3112 | { |
| 3113 | reg = 13; |
| 3114 | addend -= (sdata->sym_hash->root.u.def.value |
| 3115 | + sdata->sym_hash->root.u.def.section->output_section->vma |
| 3116 | + sdata->sym_hash->root.u.def.section->output_offset); |
| 3117 | } |
| 3118 | |
| 3119 | else if (strcmp (name, ".sdata2") == 0 || strcmp (name, ".sbss2") == 0) |
| 3120 | { |
| 3121 | reg = 2; |
| 3122 | addend -= (sdata2->sym_hash->root.u.def.value |
| 3123 | + sdata2->sym_hash->root.u.def.section->output_section->vma |
| 3124 | + sdata2->sym_hash->root.u.def.section->output_offset); |
| 3125 | } |
| 3126 | |
| 3127 | else if (strcmp (name, ".PPC.EMB.sdata0") == 0 || strcmp (name, ".PPC.EMB.sbss0") == 0) |
| 3128 | { |
| 3129 | reg = 0; |
| 3130 | } |
| 3131 | |
| 3132 | else |
| 3133 | { |
| 3134 | (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)", |
| 3135 | bfd_get_filename (input_bfd), |
| 3136 | sym_name, |
| 3137 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 3138 | bfd_get_section_name (abfd, sec)); |
| 3139 | |
| 3140 | bfd_set_error (bfd_error_bad_value); |
| 3141 | ret = false; |
| 3142 | continue; |
| 3143 | } |
| 3144 | |
| 3145 | if (r_type == R_PPC_EMB_SDA21) |
| 3146 | { /* fill in register field */ |
| 3147 | insn = bfd_get_32 (output_bfd, contents + offset); |
| 3148 | insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); |
| 3149 | bfd_put_32 (output_bfd, insn, contents + offset); |
| 3150 | } |
| 3151 | } |
| 3152 | break; |
| 3153 | |
| 3154 | /* Relocate against the beginning of the section */ |
| 3155 | case (int)R_PPC_SECTOFF: |
| 3156 | case (int)R_PPC_SECTOFF_LO: |
| 3157 | case (int)R_PPC_SECTOFF_HI: |
| 3158 | BFD_ASSERT (sec != (asection *)0); |
| 3159 | addend -= sec->output_section->vma; |
| 3160 | break; |
| 3161 | |
| 3162 | case (int)R_PPC_SECTOFF_HA: |
| 3163 | BFD_ASSERT (sec != (asection *)0); |
| 3164 | addend -= sec->output_section->vma; |
| 3165 | addend += ((relocation + addend) & 0x8000) << 1; |
| 3166 | break; |
| 3167 | |
| 3168 | /* Negative relocations */ |
| 3169 | case (int)R_PPC_EMB_NADDR32: |
| 3170 | case (int)R_PPC_EMB_NADDR16: |
| 3171 | case (int)R_PPC_EMB_NADDR16_LO: |
| 3172 | case (int)R_PPC_EMB_NADDR16_HI: |
| 3173 | addend -= 2*relocation; |
| 3174 | break; |
| 3175 | |
| 3176 | case (int)R_PPC_EMB_NADDR16_HA: |
| 3177 | addend -= 2*relocation; |
| 3178 | addend += ((relocation + addend) & 0x8000) << 1; |
| 3179 | break; |
| 3180 | |
| 3181 | /* NOP relocation that prevents garbage collecting linkers from omitting a |
| 3182 | reference. */ |
| 3183 | case (int)R_PPC_EMB_MRKREF: |
| 3184 | continue; |
| 3185 | |
| 3186 | case (int)R_PPC_COPY: |
| 3187 | case (int)R_PPC_GLOB_DAT: |
| 3188 | case (int)R_PPC_JMP_SLOT: |
| 3189 | case (int)R_PPC_RELATIVE: |
| 3190 | case (int)R_PPC_PLT32: |
| 3191 | case (int)R_PPC_PLTREL32: |
| 3192 | case (int)R_PPC_PLT16_LO: |
| 3193 | case (int)R_PPC_PLT16_HI: |
| 3194 | case (int)R_PPC_PLT16_HA: |
| 3195 | case (int)R_PPC_EMB_RELSEC16: |
| 3196 | case (int)R_PPC_EMB_RELST_LO: |
| 3197 | case (int)R_PPC_EMB_RELST_HI: |
| 3198 | case (int)R_PPC_EMB_RELST_HA: |
| 3199 | case (int)R_PPC_EMB_BIT_FLD: |
| 3200 | (*_bfd_error_handler) ("%s: Relocation %s is not yet supported for symbol %s.", |
| 3201 | bfd_get_filename (input_bfd), |
| 3202 | ppc_elf_howto_table[ (int)r_type ]->name, |
| 3203 | sym_name); |
| 3204 | |
| 3205 | bfd_set_error (bfd_error_invalid_operation); |
| 3206 | ret = false; |
| 3207 | continue; |
| 3208 | } |
| 3209 | |
| 3210 | |
| 3211 | #ifdef DEBUG |
| 3212 | fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n", |
| 3213 | howto->name, |
| 3214 | (int)r_type, |
| 3215 | sym_name, |
| 3216 | r_symndx, |
| 3217 | (long)offset, |
| 3218 | (long)addend); |
| 3219 | #endif |
| 3220 | |
| 3221 | r = _bfd_final_link_relocate (howto, |
| 3222 | input_bfd, |
| 3223 | input_section, |
| 3224 | contents, |
| 3225 | offset, |
| 3226 | relocation, |
| 3227 | addend); |
| 3228 | |
| 3229 | if (r != bfd_reloc_ok) |
| 3230 | { |
| 3231 | ret = false; |
| 3232 | switch (r) |
| 3233 | { |
| 3234 | default: |
| 3235 | break; |
| 3236 | |
| 3237 | case bfd_reloc_overflow: |
| 3238 | { |
| 3239 | const char *name; |
| 3240 | |
| 3241 | if (h != NULL) |
| 3242 | name = h->root.root.string; |
| 3243 | else |
| 3244 | { |
| 3245 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 3246 | symtab_hdr->sh_link, |
| 3247 | sym->st_name); |
| 3248 | if (name == NULL) |
| 3249 | break; |
| 3250 | |
| 3251 | if (*name == '\0') |
| 3252 | name = bfd_section_name (input_bfd, sec); |
| 3253 | } |
| 3254 | |
| 3255 | (*info->callbacks->reloc_overflow)(info, |
| 3256 | name, |
| 3257 | howto->name, |
| 3258 | (bfd_vma) 0, |
| 3259 | input_bfd, |
| 3260 | input_section, |
| 3261 | offset); |
| 3262 | } |
| 3263 | break; |
| 3264 | |
| 3265 | } |
| 3266 | } |
| 3267 | } |
| 3268 | |
| 3269 | |
| 3270 | #ifdef DEBUG |
| 3271 | fprintf (stderr, "\n"); |
| 3272 | #endif |
| 3273 | |
| 3274 | return ret; |
| 3275 | } |
| 3276 | |
| 3277 | \f |
| 3278 | #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec |
| 3279 | #define TARGET_LITTLE_NAME "elf32-powerpcle" |
| 3280 | #define TARGET_BIG_SYM bfd_elf32_powerpc_vec |
| 3281 | #define TARGET_BIG_NAME "elf32-powerpc" |
| 3282 | #define ELF_ARCH bfd_arch_powerpc |
| 3283 | #define ELF_MACHINE_CODE EM_PPC |
| 3284 | #define ELF_MAXPAGESIZE 0x10000 |
| 3285 | #define elf_info_to_howto ppc_elf_info_to_howto |
| 3286 | |
| 3287 | #ifdef EM_CYGNUS_POWERPC |
| 3288 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC |
| 3289 | #endif |
| 3290 | |
| 3291 | #ifdef EM_PPC_OLD |
| 3292 | #define ELF_MACHINE_ALT2 EM_PPC_OLD |
| 3293 | #endif |
| 3294 | |
| 3295 | #define elf_backend_plt_not_loaded 1 |
| 3296 | #define elf_backend_got_symbol_offset 4 |
| 3297 | |
| 3298 | #define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data |
| 3299 | #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data |
| 3300 | #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags |
| 3301 | #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup |
| 3302 | #define elf_backend_section_from_shdr ppc_elf_section_from_shdr |
| 3303 | #define elf_backend_relocate_section ppc_elf_relocate_section |
| 3304 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
| 3305 | #define elf_backend_check_relocs ppc_elf_check_relocs |
| 3306 | #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol |
| 3307 | #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook |
| 3308 | #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections |
| 3309 | #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol |
| 3310 | #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections |
| 3311 | #define elf_backend_fake_sections ppc_elf_fake_sections |
| 3312 | #define elf_backend_additional_program_headers ppc_elf_additional_program_headers |
| 3313 | #define elf_backend_modify_segment_map ppc_elf_modify_segment_map |
| 3314 | |
| 3315 | #include "elf32-target.h" |