| 1 | /* PowerPC-specific support for 32-bit ELF |
| 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
| 3 | 2004, 2005 Free Software Foundation, Inc. |
| 4 | Written by Ian Lance Taylor, Cygnus Support. |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the |
| 20 | Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
| 21 | Boston, MA 02110-1301, USA. */ |
| 22 | |
| 23 | /* This file is based on a preliminary PowerPC ELF ABI. The |
| 24 | information may not match the final PowerPC ELF ABI. It includes |
| 25 | suggestions from the in-progress Embedded PowerPC ABI, and that |
| 26 | information may also not match. */ |
| 27 | |
| 28 | #include "bfd.h" |
| 29 | #include "sysdep.h" |
| 30 | #include "bfdlink.h" |
| 31 | #include "libbfd.h" |
| 32 | #include "elf-bfd.h" |
| 33 | #include "elf/ppc.h" |
| 34 | #include "elf32-ppc.h" |
| 35 | |
| 36 | /* RELA relocations are used here. */ |
| 37 | |
| 38 | static bfd_reloc_status_type ppc_elf_addr16_ha_reloc |
| 39 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 40 | static bfd_reloc_status_type ppc_elf_unhandled_reloc |
| 41 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 42 | |
| 43 | /* Branch prediction bit for branch taken relocs. */ |
| 44 | #define BRANCH_PREDICT_BIT 0x200000 |
| 45 | /* Mask to set RA in memory instructions. */ |
| 46 | #define RA_REGISTER_MASK 0x001f0000 |
| 47 | /* Value to shift register by to insert RA. */ |
| 48 | #define RA_REGISTER_SHIFT 16 |
| 49 | |
| 50 | /* The name of the dynamic interpreter. This is put in the .interp |
| 51 | section. */ |
| 52 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 53 | |
| 54 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 55 | #define PLT_ENTRY_SIZE 12 |
| 56 | /* The initial size of the plt reserved for the dynamic linker. */ |
| 57 | #define PLT_INITIAL_ENTRY_SIZE 72 |
| 58 | /* The size of the gap between entries in the PLT. */ |
| 59 | #define PLT_SLOT_SIZE 8 |
| 60 | /* The number of single-slot PLT entries (the rest use two slots). */ |
| 61 | #define PLT_NUM_SINGLE_ENTRIES 8192 |
| 62 | |
| 63 | /* Some nop instructions. */ |
| 64 | #define NOP 0x60000000 |
| 65 | #define CROR_151515 0x4def7b82 |
| 66 | #define CROR_313131 0x4ffffb82 |
| 67 | |
| 68 | /* Offset of tp and dtp pointers from start of TLS block. */ |
| 69 | #define TP_OFFSET 0x7000 |
| 70 | #define DTP_OFFSET 0x8000 |
| 71 | \f |
| 72 | static reloc_howto_type *ppc_elf_howto_table[R_PPC_max]; |
| 73 | |
| 74 | static reloc_howto_type ppc_elf_howto_raw[] = { |
| 75 | /* This reloc does nothing. */ |
| 76 | HOWTO (R_PPC_NONE, /* type */ |
| 77 | 0, /* rightshift */ |
| 78 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 79 | 32, /* bitsize */ |
| 80 | FALSE, /* pc_relative */ |
| 81 | 0, /* bitpos */ |
| 82 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 83 | bfd_elf_generic_reloc, /* special_function */ |
| 84 | "R_PPC_NONE", /* name */ |
| 85 | FALSE, /* partial_inplace */ |
| 86 | 0, /* src_mask */ |
| 87 | 0, /* dst_mask */ |
| 88 | FALSE), /* pcrel_offset */ |
| 89 | |
| 90 | /* A standard 32 bit relocation. */ |
| 91 | HOWTO (R_PPC_ADDR32, /* type */ |
| 92 | 0, /* rightshift */ |
| 93 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 94 | 32, /* bitsize */ |
| 95 | FALSE, /* pc_relative */ |
| 96 | 0, /* bitpos */ |
| 97 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 98 | bfd_elf_generic_reloc, /* special_function */ |
| 99 | "R_PPC_ADDR32", /* name */ |
| 100 | FALSE, /* partial_inplace */ |
| 101 | 0, /* src_mask */ |
| 102 | 0xffffffff, /* dst_mask */ |
| 103 | FALSE), /* pcrel_offset */ |
| 104 | |
| 105 | /* An absolute 26 bit branch; the lower two bits must be zero. |
| 106 | FIXME: we don't check that, we just clear them. */ |
| 107 | HOWTO (R_PPC_ADDR24, /* type */ |
| 108 | 0, /* rightshift */ |
| 109 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 110 | 26, /* bitsize */ |
| 111 | FALSE, /* pc_relative */ |
| 112 | 0, /* bitpos */ |
| 113 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 114 | bfd_elf_generic_reloc, /* special_function */ |
| 115 | "R_PPC_ADDR24", /* name */ |
| 116 | FALSE, /* partial_inplace */ |
| 117 | 0, /* src_mask */ |
| 118 | 0x3fffffc, /* dst_mask */ |
| 119 | FALSE), /* pcrel_offset */ |
| 120 | |
| 121 | /* A standard 16 bit relocation. */ |
| 122 | HOWTO (R_PPC_ADDR16, /* type */ |
| 123 | 0, /* rightshift */ |
| 124 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 125 | 16, /* bitsize */ |
| 126 | FALSE, /* pc_relative */ |
| 127 | 0, /* bitpos */ |
| 128 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 129 | bfd_elf_generic_reloc, /* special_function */ |
| 130 | "R_PPC_ADDR16", /* name */ |
| 131 | FALSE, /* partial_inplace */ |
| 132 | 0, /* src_mask */ |
| 133 | 0xffff, /* dst_mask */ |
| 134 | FALSE), /* pcrel_offset */ |
| 135 | |
| 136 | /* A 16 bit relocation without overflow. */ |
| 137 | HOWTO (R_PPC_ADDR16_LO, /* type */ |
| 138 | 0, /* rightshift */ |
| 139 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 140 | 16, /* bitsize */ |
| 141 | FALSE, /* pc_relative */ |
| 142 | 0, /* bitpos */ |
| 143 | complain_overflow_dont,/* complain_on_overflow */ |
| 144 | bfd_elf_generic_reloc, /* special_function */ |
| 145 | "R_PPC_ADDR16_LO", /* name */ |
| 146 | FALSE, /* partial_inplace */ |
| 147 | 0, /* src_mask */ |
| 148 | 0xffff, /* dst_mask */ |
| 149 | FALSE), /* pcrel_offset */ |
| 150 | |
| 151 | /* The high order 16 bits of an address. */ |
| 152 | HOWTO (R_PPC_ADDR16_HI, /* type */ |
| 153 | 16, /* rightshift */ |
| 154 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 155 | 16, /* bitsize */ |
| 156 | FALSE, /* pc_relative */ |
| 157 | 0, /* bitpos */ |
| 158 | complain_overflow_dont, /* complain_on_overflow */ |
| 159 | bfd_elf_generic_reloc, /* special_function */ |
| 160 | "R_PPC_ADDR16_HI", /* name */ |
| 161 | FALSE, /* partial_inplace */ |
| 162 | 0, /* src_mask */ |
| 163 | 0xffff, /* dst_mask */ |
| 164 | FALSE), /* pcrel_offset */ |
| 165 | |
| 166 | /* The high order 16 bits of an address, plus 1 if the contents of |
| 167 | the low 16 bits, treated as a signed number, is negative. */ |
| 168 | HOWTO (R_PPC_ADDR16_HA, /* type */ |
| 169 | 16, /* rightshift */ |
| 170 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 171 | 16, /* bitsize */ |
| 172 | FALSE, /* pc_relative */ |
| 173 | 0, /* bitpos */ |
| 174 | complain_overflow_dont, /* complain_on_overflow */ |
| 175 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 176 | "R_PPC_ADDR16_HA", /* name */ |
| 177 | FALSE, /* partial_inplace */ |
| 178 | 0, /* src_mask */ |
| 179 | 0xffff, /* dst_mask */ |
| 180 | FALSE), /* pcrel_offset */ |
| 181 | |
| 182 | /* An absolute 16 bit branch; the lower two bits must be zero. |
| 183 | FIXME: we don't check that, we just clear them. */ |
| 184 | HOWTO (R_PPC_ADDR14, /* type */ |
| 185 | 0, /* rightshift */ |
| 186 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 187 | 16, /* 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_ADDR14", /* name */ |
| 193 | FALSE, /* partial_inplace */ |
| 194 | 0, /* src_mask */ |
| 195 | 0xfffc, /* dst_mask */ |
| 196 | FALSE), /* pcrel_offset */ |
| 197 | |
| 198 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 199 | indicate that the branch is expected to be taken. The lower two |
| 200 | bits must be zero. */ |
| 201 | HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */ |
| 202 | 0, /* rightshift */ |
| 203 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 204 | 16, /* bitsize */ |
| 205 | FALSE, /* pc_relative */ |
| 206 | 0, /* bitpos */ |
| 207 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 208 | bfd_elf_generic_reloc, /* special_function */ |
| 209 | "R_PPC_ADDR14_BRTAKEN",/* name */ |
| 210 | FALSE, /* partial_inplace */ |
| 211 | 0, /* src_mask */ |
| 212 | 0xfffc, /* dst_mask */ |
| 213 | FALSE), /* pcrel_offset */ |
| 214 | |
| 215 | /* An absolute 16 bit branch, for which bit 10 should be set to |
| 216 | indicate that the branch is not expected to be taken. The lower |
| 217 | two bits must be zero. */ |
| 218 | HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */ |
| 219 | 0, /* rightshift */ |
| 220 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 221 | 16, /* bitsize */ |
| 222 | FALSE, /* pc_relative */ |
| 223 | 0, /* bitpos */ |
| 224 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 225 | bfd_elf_generic_reloc, /* special_function */ |
| 226 | "R_PPC_ADDR14_BRNTAKEN",/* name */ |
| 227 | FALSE, /* partial_inplace */ |
| 228 | 0, /* src_mask */ |
| 229 | 0xfffc, /* dst_mask */ |
| 230 | FALSE), /* pcrel_offset */ |
| 231 | |
| 232 | /* A relative 26 bit branch; the lower two bits must be zero. */ |
| 233 | HOWTO (R_PPC_REL24, /* type */ |
| 234 | 0, /* rightshift */ |
| 235 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 236 | 26, /* bitsize */ |
| 237 | TRUE, /* pc_relative */ |
| 238 | 0, /* bitpos */ |
| 239 | complain_overflow_signed, /* complain_on_overflow */ |
| 240 | bfd_elf_generic_reloc, /* special_function */ |
| 241 | "R_PPC_REL24", /* name */ |
| 242 | FALSE, /* partial_inplace */ |
| 243 | 0, /* src_mask */ |
| 244 | 0x3fffffc, /* dst_mask */ |
| 245 | TRUE), /* pcrel_offset */ |
| 246 | |
| 247 | /* A relative 16 bit branch; the lower two bits must be zero. */ |
| 248 | HOWTO (R_PPC_REL14, /* type */ |
| 249 | 0, /* rightshift */ |
| 250 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 251 | 16, /* bitsize */ |
| 252 | TRUE, /* pc_relative */ |
| 253 | 0, /* bitpos */ |
| 254 | complain_overflow_signed, /* complain_on_overflow */ |
| 255 | bfd_elf_generic_reloc, /* special_function */ |
| 256 | "R_PPC_REL14", /* name */ |
| 257 | FALSE, /* partial_inplace */ |
| 258 | 0, /* src_mask */ |
| 259 | 0xfffc, /* dst_mask */ |
| 260 | TRUE), /* pcrel_offset */ |
| 261 | |
| 262 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 263 | the branch is expected to be taken. The lower two bits must be |
| 264 | zero. */ |
| 265 | HOWTO (R_PPC_REL14_BRTAKEN, /* type */ |
| 266 | 0, /* rightshift */ |
| 267 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 268 | 16, /* bitsize */ |
| 269 | TRUE, /* pc_relative */ |
| 270 | 0, /* bitpos */ |
| 271 | complain_overflow_signed, /* complain_on_overflow */ |
| 272 | bfd_elf_generic_reloc, /* special_function */ |
| 273 | "R_PPC_REL14_BRTAKEN", /* name */ |
| 274 | FALSE, /* partial_inplace */ |
| 275 | 0, /* src_mask */ |
| 276 | 0xfffc, /* dst_mask */ |
| 277 | TRUE), /* pcrel_offset */ |
| 278 | |
| 279 | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| 280 | the branch is not expected to be taken. The lower two bits must |
| 281 | be zero. */ |
| 282 | HOWTO (R_PPC_REL14_BRNTAKEN, /* type */ |
| 283 | 0, /* rightshift */ |
| 284 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 285 | 16, /* bitsize */ |
| 286 | TRUE, /* pc_relative */ |
| 287 | 0, /* bitpos */ |
| 288 | complain_overflow_signed, /* complain_on_overflow */ |
| 289 | bfd_elf_generic_reloc, /* special_function */ |
| 290 | "R_PPC_REL14_BRNTAKEN",/* name */ |
| 291 | FALSE, /* partial_inplace */ |
| 292 | 0, /* src_mask */ |
| 293 | 0xfffc, /* dst_mask */ |
| 294 | TRUE), /* pcrel_offset */ |
| 295 | |
| 296 | /* Like R_PPC_ADDR16, but referring to the GOT table entry for the |
| 297 | symbol. */ |
| 298 | HOWTO (R_PPC_GOT16, /* type */ |
| 299 | 0, /* rightshift */ |
| 300 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 301 | 16, /* bitsize */ |
| 302 | FALSE, /* pc_relative */ |
| 303 | 0, /* bitpos */ |
| 304 | complain_overflow_signed, /* complain_on_overflow */ |
| 305 | bfd_elf_generic_reloc, /* special_function */ |
| 306 | "R_PPC_GOT16", /* name */ |
| 307 | FALSE, /* partial_inplace */ |
| 308 | 0, /* src_mask */ |
| 309 | 0xffff, /* dst_mask */ |
| 310 | FALSE), /* pcrel_offset */ |
| 311 | |
| 312 | /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for |
| 313 | the symbol. */ |
| 314 | HOWTO (R_PPC_GOT16_LO, /* type */ |
| 315 | 0, /* rightshift */ |
| 316 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 317 | 16, /* bitsize */ |
| 318 | FALSE, /* pc_relative */ |
| 319 | 0, /* bitpos */ |
| 320 | complain_overflow_dont, /* complain_on_overflow */ |
| 321 | bfd_elf_generic_reloc, /* special_function */ |
| 322 | "R_PPC_GOT16_LO", /* name */ |
| 323 | FALSE, /* partial_inplace */ |
| 324 | 0, /* src_mask */ |
| 325 | 0xffff, /* dst_mask */ |
| 326 | FALSE), /* pcrel_offset */ |
| 327 | |
| 328 | /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for |
| 329 | the symbol. */ |
| 330 | HOWTO (R_PPC_GOT16_HI, /* type */ |
| 331 | 16, /* rightshift */ |
| 332 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 333 | 16, /* bitsize */ |
| 334 | FALSE, /* pc_relative */ |
| 335 | 0, /* bitpos */ |
| 336 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 337 | bfd_elf_generic_reloc, /* special_function */ |
| 338 | "R_PPC_GOT16_HI", /* name */ |
| 339 | FALSE, /* partial_inplace */ |
| 340 | 0, /* src_mask */ |
| 341 | 0xffff, /* dst_mask */ |
| 342 | FALSE), /* pcrel_offset */ |
| 343 | |
| 344 | /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for |
| 345 | the symbol. */ |
| 346 | HOWTO (R_PPC_GOT16_HA, /* type */ |
| 347 | 16, /* rightshift */ |
| 348 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 349 | 16, /* bitsize */ |
| 350 | FALSE, /* pc_relative */ |
| 351 | 0, /* bitpos */ |
| 352 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 353 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 354 | "R_PPC_GOT16_HA", /* name */ |
| 355 | FALSE, /* partial_inplace */ |
| 356 | 0, /* src_mask */ |
| 357 | 0xffff, /* dst_mask */ |
| 358 | FALSE), /* pcrel_offset */ |
| 359 | |
| 360 | /* Like R_PPC_REL24, but referring to the procedure linkage table |
| 361 | entry for the symbol. */ |
| 362 | HOWTO (R_PPC_PLTREL24, /* type */ |
| 363 | 0, /* rightshift */ |
| 364 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 365 | 26, /* bitsize */ |
| 366 | TRUE, /* pc_relative */ |
| 367 | 0, /* bitpos */ |
| 368 | complain_overflow_signed, /* complain_on_overflow */ |
| 369 | bfd_elf_generic_reloc, /* special_function */ |
| 370 | "R_PPC_PLTREL24", /* name */ |
| 371 | FALSE, /* partial_inplace */ |
| 372 | 0, /* src_mask */ |
| 373 | 0x3fffffc, /* dst_mask */ |
| 374 | TRUE), /* pcrel_offset */ |
| 375 | |
| 376 | /* This is used only by the dynamic linker. The symbol should exist |
| 377 | both in the object being run and in some shared library. The |
| 378 | dynamic linker copies the data addressed by the symbol from the |
| 379 | shared library into the object, because the object being |
| 380 | run has to have the data at some particular address. */ |
| 381 | HOWTO (R_PPC_COPY, /* type */ |
| 382 | 0, /* rightshift */ |
| 383 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 384 | 32, /* bitsize */ |
| 385 | FALSE, /* pc_relative */ |
| 386 | 0, /* bitpos */ |
| 387 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 388 | bfd_elf_generic_reloc, /* special_function */ |
| 389 | "R_PPC_COPY", /* name */ |
| 390 | FALSE, /* partial_inplace */ |
| 391 | 0, /* src_mask */ |
| 392 | 0, /* dst_mask */ |
| 393 | FALSE), /* pcrel_offset */ |
| 394 | |
| 395 | /* Like R_PPC_ADDR32, but used when setting global offset table |
| 396 | entries. */ |
| 397 | HOWTO (R_PPC_GLOB_DAT, /* type */ |
| 398 | 0, /* rightshift */ |
| 399 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 400 | 32, /* bitsize */ |
| 401 | FALSE, /* pc_relative */ |
| 402 | 0, /* bitpos */ |
| 403 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 404 | bfd_elf_generic_reloc, /* special_function */ |
| 405 | "R_PPC_GLOB_DAT", /* name */ |
| 406 | FALSE, /* partial_inplace */ |
| 407 | 0, /* src_mask */ |
| 408 | 0xffffffff, /* dst_mask */ |
| 409 | FALSE), /* pcrel_offset */ |
| 410 | |
| 411 | /* Marks a procedure linkage table entry for a symbol. */ |
| 412 | HOWTO (R_PPC_JMP_SLOT, /* type */ |
| 413 | 0, /* rightshift */ |
| 414 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 415 | 32, /* bitsize */ |
| 416 | FALSE, /* pc_relative */ |
| 417 | 0, /* bitpos */ |
| 418 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 419 | bfd_elf_generic_reloc, /* special_function */ |
| 420 | "R_PPC_JMP_SLOT", /* name */ |
| 421 | FALSE, /* partial_inplace */ |
| 422 | 0, /* src_mask */ |
| 423 | 0, /* dst_mask */ |
| 424 | FALSE), /* pcrel_offset */ |
| 425 | |
| 426 | /* Used only by the dynamic linker. When the object is run, this |
| 427 | longword is set to the load address of the object, plus the |
| 428 | addend. */ |
| 429 | HOWTO (R_PPC_RELATIVE, /* type */ |
| 430 | 0, /* rightshift */ |
| 431 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 432 | 32, /* bitsize */ |
| 433 | FALSE, /* pc_relative */ |
| 434 | 0, /* bitpos */ |
| 435 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 436 | bfd_elf_generic_reloc, /* special_function */ |
| 437 | "R_PPC_RELATIVE", /* name */ |
| 438 | FALSE, /* partial_inplace */ |
| 439 | 0, /* src_mask */ |
| 440 | 0xffffffff, /* dst_mask */ |
| 441 | FALSE), /* pcrel_offset */ |
| 442 | |
| 443 | /* Like R_PPC_REL24, but uses the value of the symbol within the |
| 444 | object rather than the final value. Normally used for |
| 445 | _GLOBAL_OFFSET_TABLE_. */ |
| 446 | HOWTO (R_PPC_LOCAL24PC, /* type */ |
| 447 | 0, /* rightshift */ |
| 448 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 449 | 26, /* bitsize */ |
| 450 | TRUE, /* pc_relative */ |
| 451 | 0, /* bitpos */ |
| 452 | complain_overflow_signed, /* complain_on_overflow */ |
| 453 | bfd_elf_generic_reloc, /* special_function */ |
| 454 | "R_PPC_LOCAL24PC", /* name */ |
| 455 | FALSE, /* partial_inplace */ |
| 456 | 0, /* src_mask */ |
| 457 | 0x3fffffc, /* dst_mask */ |
| 458 | TRUE), /* pcrel_offset */ |
| 459 | |
| 460 | /* Like R_PPC_ADDR32, but may be unaligned. */ |
| 461 | HOWTO (R_PPC_UADDR32, /* type */ |
| 462 | 0, /* rightshift */ |
| 463 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 464 | 32, /* bitsize */ |
| 465 | FALSE, /* pc_relative */ |
| 466 | 0, /* bitpos */ |
| 467 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 468 | bfd_elf_generic_reloc, /* special_function */ |
| 469 | "R_PPC_UADDR32", /* name */ |
| 470 | FALSE, /* partial_inplace */ |
| 471 | 0, /* src_mask */ |
| 472 | 0xffffffff, /* dst_mask */ |
| 473 | FALSE), /* pcrel_offset */ |
| 474 | |
| 475 | /* Like R_PPC_ADDR16, but may be unaligned. */ |
| 476 | HOWTO (R_PPC_UADDR16, /* type */ |
| 477 | 0, /* rightshift */ |
| 478 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 479 | 16, /* bitsize */ |
| 480 | FALSE, /* pc_relative */ |
| 481 | 0, /* bitpos */ |
| 482 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 483 | bfd_elf_generic_reloc, /* special_function */ |
| 484 | "R_PPC_UADDR16", /* name */ |
| 485 | FALSE, /* partial_inplace */ |
| 486 | 0, /* src_mask */ |
| 487 | 0xffff, /* dst_mask */ |
| 488 | FALSE), /* pcrel_offset */ |
| 489 | |
| 490 | /* 32-bit PC relative */ |
| 491 | HOWTO (R_PPC_REL32, /* type */ |
| 492 | 0, /* rightshift */ |
| 493 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 494 | 32, /* bitsize */ |
| 495 | TRUE, /* pc_relative */ |
| 496 | 0, /* bitpos */ |
| 497 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 498 | bfd_elf_generic_reloc, /* special_function */ |
| 499 | "R_PPC_REL32", /* name */ |
| 500 | FALSE, /* partial_inplace */ |
| 501 | 0, /* src_mask */ |
| 502 | 0xffffffff, /* dst_mask */ |
| 503 | TRUE), /* pcrel_offset */ |
| 504 | |
| 505 | /* 32-bit relocation to the symbol's procedure linkage table. |
| 506 | FIXME: not supported. */ |
| 507 | HOWTO (R_PPC_PLT32, /* type */ |
| 508 | 0, /* rightshift */ |
| 509 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 510 | 32, /* bitsize */ |
| 511 | FALSE, /* pc_relative */ |
| 512 | 0, /* bitpos */ |
| 513 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 514 | bfd_elf_generic_reloc, /* special_function */ |
| 515 | "R_PPC_PLT32", /* name */ |
| 516 | FALSE, /* partial_inplace */ |
| 517 | 0, /* src_mask */ |
| 518 | 0, /* dst_mask */ |
| 519 | FALSE), /* pcrel_offset */ |
| 520 | |
| 521 | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| 522 | FIXME: not supported. */ |
| 523 | HOWTO (R_PPC_PLTREL32, /* type */ |
| 524 | 0, /* rightshift */ |
| 525 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 526 | 32, /* bitsize */ |
| 527 | TRUE, /* pc_relative */ |
| 528 | 0, /* bitpos */ |
| 529 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 530 | bfd_elf_generic_reloc, /* special_function */ |
| 531 | "R_PPC_PLTREL32", /* name */ |
| 532 | FALSE, /* partial_inplace */ |
| 533 | 0, /* src_mask */ |
| 534 | 0, /* dst_mask */ |
| 535 | TRUE), /* pcrel_offset */ |
| 536 | |
| 537 | /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for |
| 538 | the symbol. */ |
| 539 | HOWTO (R_PPC_PLT16_LO, /* type */ |
| 540 | 0, /* rightshift */ |
| 541 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 542 | 16, /* bitsize */ |
| 543 | FALSE, /* pc_relative */ |
| 544 | 0, /* bitpos */ |
| 545 | complain_overflow_dont, /* complain_on_overflow */ |
| 546 | bfd_elf_generic_reloc, /* special_function */ |
| 547 | "R_PPC_PLT16_LO", /* name */ |
| 548 | FALSE, /* partial_inplace */ |
| 549 | 0, /* src_mask */ |
| 550 | 0xffff, /* dst_mask */ |
| 551 | FALSE), /* pcrel_offset */ |
| 552 | |
| 553 | /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for |
| 554 | the symbol. */ |
| 555 | HOWTO (R_PPC_PLT16_HI, /* type */ |
| 556 | 16, /* rightshift */ |
| 557 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 558 | 16, /* bitsize */ |
| 559 | FALSE, /* pc_relative */ |
| 560 | 0, /* bitpos */ |
| 561 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 562 | bfd_elf_generic_reloc, /* special_function */ |
| 563 | "R_PPC_PLT16_HI", /* name */ |
| 564 | FALSE, /* partial_inplace */ |
| 565 | 0, /* src_mask */ |
| 566 | 0xffff, /* dst_mask */ |
| 567 | FALSE), /* pcrel_offset */ |
| 568 | |
| 569 | /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for |
| 570 | the symbol. */ |
| 571 | HOWTO (R_PPC_PLT16_HA, /* type */ |
| 572 | 16, /* rightshift */ |
| 573 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 574 | 16, /* bitsize */ |
| 575 | FALSE, /* pc_relative */ |
| 576 | 0, /* bitpos */ |
| 577 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 578 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 579 | "R_PPC_PLT16_HA", /* name */ |
| 580 | FALSE, /* partial_inplace */ |
| 581 | 0, /* src_mask */ |
| 582 | 0xffff, /* dst_mask */ |
| 583 | FALSE), /* pcrel_offset */ |
| 584 | |
| 585 | /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with |
| 586 | small data items. */ |
| 587 | HOWTO (R_PPC_SDAREL16, /* type */ |
| 588 | 0, /* rightshift */ |
| 589 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 590 | 16, /* bitsize */ |
| 591 | FALSE, /* pc_relative */ |
| 592 | 0, /* bitpos */ |
| 593 | complain_overflow_signed, /* complain_on_overflow */ |
| 594 | bfd_elf_generic_reloc, /* special_function */ |
| 595 | "R_PPC_SDAREL16", /* name */ |
| 596 | FALSE, /* partial_inplace */ |
| 597 | 0, /* src_mask */ |
| 598 | 0xffff, /* dst_mask */ |
| 599 | FALSE), /* pcrel_offset */ |
| 600 | |
| 601 | /* 16-bit section relative relocation. */ |
| 602 | HOWTO (R_PPC_SECTOFF, /* type */ |
| 603 | 0, /* rightshift */ |
| 604 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 605 | 16, /* bitsize */ |
| 606 | FALSE, /* pc_relative */ |
| 607 | 0, /* bitpos */ |
| 608 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 609 | bfd_elf_generic_reloc, /* special_function */ |
| 610 | "R_PPC_SECTOFF", /* name */ |
| 611 | FALSE, /* partial_inplace */ |
| 612 | 0, /* src_mask */ |
| 613 | 0xffff, /* dst_mask */ |
| 614 | FALSE), /* pcrel_offset */ |
| 615 | |
| 616 | /* 16-bit lower half section relative relocation. */ |
| 617 | HOWTO (R_PPC_SECTOFF_LO, /* type */ |
| 618 | 0, /* rightshift */ |
| 619 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 620 | 16, /* bitsize */ |
| 621 | FALSE, /* pc_relative */ |
| 622 | 0, /* bitpos */ |
| 623 | complain_overflow_dont, /* complain_on_overflow */ |
| 624 | bfd_elf_generic_reloc, /* special_function */ |
| 625 | "R_PPC_SECTOFF_LO", /* name */ |
| 626 | FALSE, /* partial_inplace */ |
| 627 | 0, /* src_mask */ |
| 628 | 0xffff, /* dst_mask */ |
| 629 | FALSE), /* pcrel_offset */ |
| 630 | |
| 631 | /* 16-bit upper half section relative relocation. */ |
| 632 | HOWTO (R_PPC_SECTOFF_HI, /* type */ |
| 633 | 16, /* rightshift */ |
| 634 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 635 | 16, /* bitsize */ |
| 636 | FALSE, /* pc_relative */ |
| 637 | 0, /* bitpos */ |
| 638 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 639 | bfd_elf_generic_reloc, /* special_function */ |
| 640 | "R_PPC_SECTOFF_HI", /* name */ |
| 641 | FALSE, /* partial_inplace */ |
| 642 | 0, /* src_mask */ |
| 643 | 0xffff, /* dst_mask */ |
| 644 | FALSE), /* pcrel_offset */ |
| 645 | |
| 646 | /* 16-bit upper half adjusted section relative relocation. */ |
| 647 | HOWTO (R_PPC_SECTOFF_HA, /* type */ |
| 648 | 16, /* 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 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 655 | "R_PPC_SECTOFF_HA", /* name */ |
| 656 | FALSE, /* partial_inplace */ |
| 657 | 0, /* src_mask */ |
| 658 | 0xffff, /* dst_mask */ |
| 659 | FALSE), /* pcrel_offset */ |
| 660 | |
| 661 | /* Marker reloc for TLS. */ |
| 662 | HOWTO (R_PPC_TLS, |
| 663 | 0, /* rightshift */ |
| 664 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 665 | 32, /* bitsize */ |
| 666 | FALSE, /* pc_relative */ |
| 667 | 0, /* bitpos */ |
| 668 | complain_overflow_dont, /* complain_on_overflow */ |
| 669 | bfd_elf_generic_reloc, /* special_function */ |
| 670 | "R_PPC_TLS", /* name */ |
| 671 | FALSE, /* partial_inplace */ |
| 672 | 0, /* src_mask */ |
| 673 | 0, /* dst_mask */ |
| 674 | FALSE), /* pcrel_offset */ |
| 675 | |
| 676 | /* Computes the load module index of the load module that contains the |
| 677 | definition of its TLS sym. */ |
| 678 | HOWTO (R_PPC_DTPMOD32, |
| 679 | 0, /* rightshift */ |
| 680 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 681 | 32, /* bitsize */ |
| 682 | FALSE, /* pc_relative */ |
| 683 | 0, /* bitpos */ |
| 684 | complain_overflow_dont, /* complain_on_overflow */ |
| 685 | ppc_elf_unhandled_reloc, /* special_function */ |
| 686 | "R_PPC_DTPMOD32", /* name */ |
| 687 | FALSE, /* partial_inplace */ |
| 688 | 0, /* src_mask */ |
| 689 | 0xffffffff, /* dst_mask */ |
| 690 | FALSE), /* pcrel_offset */ |
| 691 | |
| 692 | /* Computes a dtv-relative displacement, the difference between the value |
| 693 | of sym+add and the base address of the thread-local storage block that |
| 694 | contains the definition of sym, minus 0x8000. */ |
| 695 | HOWTO (R_PPC_DTPREL32, |
| 696 | 0, /* rightshift */ |
| 697 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 698 | 32, /* bitsize */ |
| 699 | FALSE, /* pc_relative */ |
| 700 | 0, /* bitpos */ |
| 701 | complain_overflow_dont, /* complain_on_overflow */ |
| 702 | ppc_elf_unhandled_reloc, /* special_function */ |
| 703 | "R_PPC_DTPREL32", /* name */ |
| 704 | FALSE, /* partial_inplace */ |
| 705 | 0, /* src_mask */ |
| 706 | 0xffffffff, /* dst_mask */ |
| 707 | FALSE), /* pcrel_offset */ |
| 708 | |
| 709 | /* A 16 bit dtprel reloc. */ |
| 710 | HOWTO (R_PPC_DTPREL16, |
| 711 | 0, /* rightshift */ |
| 712 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 713 | 16, /* bitsize */ |
| 714 | FALSE, /* pc_relative */ |
| 715 | 0, /* bitpos */ |
| 716 | complain_overflow_signed, /* complain_on_overflow */ |
| 717 | ppc_elf_unhandled_reloc, /* special_function */ |
| 718 | "R_PPC_DTPREL16", /* name */ |
| 719 | FALSE, /* partial_inplace */ |
| 720 | 0, /* src_mask */ |
| 721 | 0xffff, /* dst_mask */ |
| 722 | FALSE), /* pcrel_offset */ |
| 723 | |
| 724 | /* Like DTPREL16, but no overflow. */ |
| 725 | HOWTO (R_PPC_DTPREL16_LO, |
| 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_dont, /* complain_on_overflow */ |
| 732 | ppc_elf_unhandled_reloc, /* special_function */ |
| 733 | "R_PPC_DTPREL16_LO", /* name */ |
| 734 | FALSE, /* partial_inplace */ |
| 735 | 0, /* src_mask */ |
| 736 | 0xffff, /* dst_mask */ |
| 737 | FALSE), /* pcrel_offset */ |
| 738 | |
| 739 | /* Like DTPREL16_LO, but next higher group of 16 bits. */ |
| 740 | HOWTO (R_PPC_DTPREL16_HI, |
| 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_dont, /* complain_on_overflow */ |
| 747 | ppc_elf_unhandled_reloc, /* special_function */ |
| 748 | "R_PPC_DTPREL16_HI", /* name */ |
| 749 | FALSE, /* partial_inplace */ |
| 750 | 0, /* src_mask */ |
| 751 | 0xffff, /* dst_mask */ |
| 752 | FALSE), /* pcrel_offset */ |
| 753 | |
| 754 | /* Like DTPREL16_HI, but adjust for low 16 bits. */ |
| 755 | HOWTO (R_PPC_DTPREL16_HA, |
| 756 | 16, /* rightshift */ |
| 757 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 758 | 16, /* bitsize */ |
| 759 | FALSE, /* pc_relative */ |
| 760 | 0, /* bitpos */ |
| 761 | complain_overflow_dont, /* complain_on_overflow */ |
| 762 | ppc_elf_unhandled_reloc, /* special_function */ |
| 763 | "R_PPC_DTPREL16_HA", /* name */ |
| 764 | FALSE, /* partial_inplace */ |
| 765 | 0, /* src_mask */ |
| 766 | 0xffff, /* dst_mask */ |
| 767 | FALSE), /* pcrel_offset */ |
| 768 | |
| 769 | /* Computes a tp-relative displacement, the difference between the value of |
| 770 | sym+add and the value of the thread pointer (r13). */ |
| 771 | HOWTO (R_PPC_TPREL32, |
| 772 | 0, /* rightshift */ |
| 773 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 774 | 32, /* bitsize */ |
| 775 | FALSE, /* pc_relative */ |
| 776 | 0, /* bitpos */ |
| 777 | complain_overflow_dont, /* complain_on_overflow */ |
| 778 | ppc_elf_unhandled_reloc, /* special_function */ |
| 779 | "R_PPC_TPREL32", /* name */ |
| 780 | FALSE, /* partial_inplace */ |
| 781 | 0, /* src_mask */ |
| 782 | 0xffffffff, /* dst_mask */ |
| 783 | FALSE), /* pcrel_offset */ |
| 784 | |
| 785 | /* A 16 bit tprel reloc. */ |
| 786 | HOWTO (R_PPC_TPREL16, |
| 787 | 0, /* rightshift */ |
| 788 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 789 | 16, /* bitsize */ |
| 790 | FALSE, /* pc_relative */ |
| 791 | 0, /* bitpos */ |
| 792 | complain_overflow_signed, /* complain_on_overflow */ |
| 793 | ppc_elf_unhandled_reloc, /* special_function */ |
| 794 | "R_PPC_TPREL16", /* name */ |
| 795 | FALSE, /* partial_inplace */ |
| 796 | 0, /* src_mask */ |
| 797 | 0xffff, /* dst_mask */ |
| 798 | FALSE), /* pcrel_offset */ |
| 799 | |
| 800 | /* Like TPREL16, but no overflow. */ |
| 801 | HOWTO (R_PPC_TPREL16_LO, |
| 802 | 0, /* rightshift */ |
| 803 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 804 | 16, /* bitsize */ |
| 805 | FALSE, /* pc_relative */ |
| 806 | 0, /* bitpos */ |
| 807 | complain_overflow_dont, /* complain_on_overflow */ |
| 808 | ppc_elf_unhandled_reloc, /* special_function */ |
| 809 | "R_PPC_TPREL16_LO", /* name */ |
| 810 | FALSE, /* partial_inplace */ |
| 811 | 0, /* src_mask */ |
| 812 | 0xffff, /* dst_mask */ |
| 813 | FALSE), /* pcrel_offset */ |
| 814 | |
| 815 | /* Like TPREL16_LO, but next higher group of 16 bits. */ |
| 816 | HOWTO (R_PPC_TPREL16_HI, |
| 817 | 16, /* rightshift */ |
| 818 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 819 | 16, /* bitsize */ |
| 820 | FALSE, /* pc_relative */ |
| 821 | 0, /* bitpos */ |
| 822 | complain_overflow_dont, /* complain_on_overflow */ |
| 823 | ppc_elf_unhandled_reloc, /* special_function */ |
| 824 | "R_PPC_TPREL16_HI", /* name */ |
| 825 | FALSE, /* partial_inplace */ |
| 826 | 0, /* src_mask */ |
| 827 | 0xffff, /* dst_mask */ |
| 828 | FALSE), /* pcrel_offset */ |
| 829 | |
| 830 | /* Like TPREL16_HI, but adjust for low 16 bits. */ |
| 831 | HOWTO (R_PPC_TPREL16_HA, |
| 832 | 16, /* rightshift */ |
| 833 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 834 | 16, /* bitsize */ |
| 835 | FALSE, /* pc_relative */ |
| 836 | 0, /* bitpos */ |
| 837 | complain_overflow_dont, /* complain_on_overflow */ |
| 838 | ppc_elf_unhandled_reloc, /* special_function */ |
| 839 | "R_PPC_TPREL16_HA", /* name */ |
| 840 | FALSE, /* partial_inplace */ |
| 841 | 0, /* src_mask */ |
| 842 | 0xffff, /* dst_mask */ |
| 843 | FALSE), /* pcrel_offset */ |
| 844 | |
| 845 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 846 | with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset |
| 847 | to the first entry. */ |
| 848 | HOWTO (R_PPC_GOT_TLSGD16, |
| 849 | 0, /* rightshift */ |
| 850 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 851 | 16, /* bitsize */ |
| 852 | FALSE, /* pc_relative */ |
| 853 | 0, /* bitpos */ |
| 854 | complain_overflow_signed, /* complain_on_overflow */ |
| 855 | ppc_elf_unhandled_reloc, /* special_function */ |
| 856 | "R_PPC_GOT_TLSGD16", /* name */ |
| 857 | FALSE, /* partial_inplace */ |
| 858 | 0, /* src_mask */ |
| 859 | 0xffff, /* dst_mask */ |
| 860 | FALSE), /* pcrel_offset */ |
| 861 | |
| 862 | /* Like GOT_TLSGD16, but no overflow. */ |
| 863 | HOWTO (R_PPC_GOT_TLSGD16_LO, |
| 864 | 0, /* rightshift */ |
| 865 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 866 | 16, /* bitsize */ |
| 867 | FALSE, /* pc_relative */ |
| 868 | 0, /* bitpos */ |
| 869 | complain_overflow_dont, /* complain_on_overflow */ |
| 870 | ppc_elf_unhandled_reloc, /* special_function */ |
| 871 | "R_PPC_GOT_TLSGD16_LO", /* name */ |
| 872 | FALSE, /* partial_inplace */ |
| 873 | 0, /* src_mask */ |
| 874 | 0xffff, /* dst_mask */ |
| 875 | FALSE), /* pcrel_offset */ |
| 876 | |
| 877 | /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
| 878 | HOWTO (R_PPC_GOT_TLSGD16_HI, |
| 879 | 16, /* rightshift */ |
| 880 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 881 | 16, /* bitsize */ |
| 882 | FALSE, /* pc_relative */ |
| 883 | 0, /* bitpos */ |
| 884 | complain_overflow_dont, /* complain_on_overflow */ |
| 885 | ppc_elf_unhandled_reloc, /* special_function */ |
| 886 | "R_PPC_GOT_TLSGD16_HI", /* name */ |
| 887 | FALSE, /* partial_inplace */ |
| 888 | 0, /* src_mask */ |
| 889 | 0xffff, /* dst_mask */ |
| 890 | FALSE), /* pcrel_offset */ |
| 891 | |
| 892 | /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
| 893 | HOWTO (R_PPC_GOT_TLSGD16_HA, |
| 894 | 16, /* rightshift */ |
| 895 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 896 | 16, /* bitsize */ |
| 897 | FALSE, /* pc_relative */ |
| 898 | 0, /* bitpos */ |
| 899 | complain_overflow_dont, /* complain_on_overflow */ |
| 900 | ppc_elf_unhandled_reloc, /* special_function */ |
| 901 | "R_PPC_GOT_TLSGD16_HA", /* name */ |
| 902 | FALSE, /* partial_inplace */ |
| 903 | 0, /* src_mask */ |
| 904 | 0xffff, /* dst_mask */ |
| 905 | FALSE), /* pcrel_offset */ |
| 906 | |
| 907 | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| 908 | with values (sym+add)@dtpmod and zero, and computes the offset to the |
| 909 | first entry. */ |
| 910 | HOWTO (R_PPC_GOT_TLSLD16, |
| 911 | 0, /* rightshift */ |
| 912 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 913 | 16, /* bitsize */ |
| 914 | FALSE, /* pc_relative */ |
| 915 | 0, /* bitpos */ |
| 916 | complain_overflow_signed, /* complain_on_overflow */ |
| 917 | ppc_elf_unhandled_reloc, /* special_function */ |
| 918 | "R_PPC_GOT_TLSLD16", /* name */ |
| 919 | FALSE, /* partial_inplace */ |
| 920 | 0, /* src_mask */ |
| 921 | 0xffff, /* dst_mask */ |
| 922 | FALSE), /* pcrel_offset */ |
| 923 | |
| 924 | /* Like GOT_TLSLD16, but no overflow. */ |
| 925 | HOWTO (R_PPC_GOT_TLSLD16_LO, |
| 926 | 0, /* rightshift */ |
| 927 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 928 | 16, /* bitsize */ |
| 929 | FALSE, /* pc_relative */ |
| 930 | 0, /* bitpos */ |
| 931 | complain_overflow_dont, /* complain_on_overflow */ |
| 932 | ppc_elf_unhandled_reloc, /* special_function */ |
| 933 | "R_PPC_GOT_TLSLD16_LO", /* name */ |
| 934 | FALSE, /* partial_inplace */ |
| 935 | 0, /* src_mask */ |
| 936 | 0xffff, /* dst_mask */ |
| 937 | FALSE), /* pcrel_offset */ |
| 938 | |
| 939 | /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
| 940 | HOWTO (R_PPC_GOT_TLSLD16_HI, |
| 941 | 16, /* rightshift */ |
| 942 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 943 | 16, /* bitsize */ |
| 944 | FALSE, /* pc_relative */ |
| 945 | 0, /* bitpos */ |
| 946 | complain_overflow_dont, /* complain_on_overflow */ |
| 947 | ppc_elf_unhandled_reloc, /* special_function */ |
| 948 | "R_PPC_GOT_TLSLD16_HI", /* name */ |
| 949 | FALSE, /* partial_inplace */ |
| 950 | 0, /* src_mask */ |
| 951 | 0xffff, /* dst_mask */ |
| 952 | FALSE), /* pcrel_offset */ |
| 953 | |
| 954 | /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
| 955 | HOWTO (R_PPC_GOT_TLSLD16_HA, |
| 956 | 16, /* rightshift */ |
| 957 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 958 | 16, /* bitsize */ |
| 959 | FALSE, /* pc_relative */ |
| 960 | 0, /* bitpos */ |
| 961 | complain_overflow_dont, /* complain_on_overflow */ |
| 962 | ppc_elf_unhandled_reloc, /* special_function */ |
| 963 | "R_PPC_GOT_TLSLD16_HA", /* name */ |
| 964 | FALSE, /* partial_inplace */ |
| 965 | 0, /* src_mask */ |
| 966 | 0xffff, /* dst_mask */ |
| 967 | FALSE), /* pcrel_offset */ |
| 968 | |
| 969 | /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes |
| 970 | the offset to the entry. */ |
| 971 | HOWTO (R_PPC_GOT_DTPREL16, |
| 972 | 0, /* rightshift */ |
| 973 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 974 | 16, /* bitsize */ |
| 975 | FALSE, /* pc_relative */ |
| 976 | 0, /* bitpos */ |
| 977 | complain_overflow_signed, /* complain_on_overflow */ |
| 978 | ppc_elf_unhandled_reloc, /* special_function */ |
| 979 | "R_PPC_GOT_DTPREL16", /* name */ |
| 980 | FALSE, /* partial_inplace */ |
| 981 | 0, /* src_mask */ |
| 982 | 0xffff, /* dst_mask */ |
| 983 | FALSE), /* pcrel_offset */ |
| 984 | |
| 985 | /* Like GOT_DTPREL16, but no overflow. */ |
| 986 | HOWTO (R_PPC_GOT_DTPREL16_LO, |
| 987 | 0, /* rightshift */ |
| 988 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 989 | 16, /* bitsize */ |
| 990 | FALSE, /* pc_relative */ |
| 991 | 0, /* bitpos */ |
| 992 | complain_overflow_dont, /* complain_on_overflow */ |
| 993 | ppc_elf_unhandled_reloc, /* special_function */ |
| 994 | "R_PPC_GOT_DTPREL16_LO", /* name */ |
| 995 | FALSE, /* partial_inplace */ |
| 996 | 0, /* src_mask */ |
| 997 | 0xffff, /* dst_mask */ |
| 998 | FALSE), /* pcrel_offset */ |
| 999 | |
| 1000 | /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */ |
| 1001 | HOWTO (R_PPC_GOT_DTPREL16_HI, |
| 1002 | 16, /* rightshift */ |
| 1003 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1004 | 16, /* bitsize */ |
| 1005 | FALSE, /* pc_relative */ |
| 1006 | 0, /* bitpos */ |
| 1007 | complain_overflow_dont, /* complain_on_overflow */ |
| 1008 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1009 | "R_PPC_GOT_DTPREL16_HI", /* name */ |
| 1010 | FALSE, /* partial_inplace */ |
| 1011 | 0, /* src_mask */ |
| 1012 | 0xffff, /* dst_mask */ |
| 1013 | FALSE), /* pcrel_offset */ |
| 1014 | |
| 1015 | /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
| 1016 | HOWTO (R_PPC_GOT_DTPREL16_HA, |
| 1017 | 16, /* rightshift */ |
| 1018 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1019 | 16, /* bitsize */ |
| 1020 | FALSE, /* pc_relative */ |
| 1021 | 0, /* bitpos */ |
| 1022 | complain_overflow_dont, /* complain_on_overflow */ |
| 1023 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1024 | "R_PPC_GOT_DTPREL16_HA", /* name */ |
| 1025 | FALSE, /* partial_inplace */ |
| 1026 | 0, /* src_mask */ |
| 1027 | 0xffff, /* dst_mask */ |
| 1028 | FALSE), /* pcrel_offset */ |
| 1029 | |
| 1030 | /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the |
| 1031 | offset to the entry. */ |
| 1032 | HOWTO (R_PPC_GOT_TPREL16, |
| 1033 | 0, /* rightshift */ |
| 1034 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1035 | 16, /* bitsize */ |
| 1036 | FALSE, /* pc_relative */ |
| 1037 | 0, /* bitpos */ |
| 1038 | complain_overflow_signed, /* complain_on_overflow */ |
| 1039 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1040 | "R_PPC_GOT_TPREL16", /* name */ |
| 1041 | FALSE, /* partial_inplace */ |
| 1042 | 0, /* src_mask */ |
| 1043 | 0xffff, /* dst_mask */ |
| 1044 | FALSE), /* pcrel_offset */ |
| 1045 | |
| 1046 | /* Like GOT_TPREL16, but no overflow. */ |
| 1047 | HOWTO (R_PPC_GOT_TPREL16_LO, |
| 1048 | 0, /* rightshift */ |
| 1049 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1050 | 16, /* bitsize */ |
| 1051 | FALSE, /* pc_relative */ |
| 1052 | 0, /* bitpos */ |
| 1053 | complain_overflow_dont, /* complain_on_overflow */ |
| 1054 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1055 | "R_PPC_GOT_TPREL16_LO", /* name */ |
| 1056 | FALSE, /* partial_inplace */ |
| 1057 | 0, /* src_mask */ |
| 1058 | 0xffff, /* dst_mask */ |
| 1059 | FALSE), /* pcrel_offset */ |
| 1060 | |
| 1061 | /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */ |
| 1062 | HOWTO (R_PPC_GOT_TPREL16_HI, |
| 1063 | 16, /* rightshift */ |
| 1064 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1065 | 16, /* bitsize */ |
| 1066 | FALSE, /* pc_relative */ |
| 1067 | 0, /* bitpos */ |
| 1068 | complain_overflow_dont, /* complain_on_overflow */ |
| 1069 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1070 | "R_PPC_GOT_TPREL16_HI", /* name */ |
| 1071 | FALSE, /* partial_inplace */ |
| 1072 | 0, /* src_mask */ |
| 1073 | 0xffff, /* dst_mask */ |
| 1074 | FALSE), /* pcrel_offset */ |
| 1075 | |
| 1076 | /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ |
| 1077 | HOWTO (R_PPC_GOT_TPREL16_HA, |
| 1078 | 16, /* rightshift */ |
| 1079 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1080 | 16, /* bitsize */ |
| 1081 | FALSE, /* pc_relative */ |
| 1082 | 0, /* bitpos */ |
| 1083 | complain_overflow_dont, /* complain_on_overflow */ |
| 1084 | ppc_elf_unhandled_reloc, /* special_function */ |
| 1085 | "R_PPC_GOT_TPREL16_HA", /* name */ |
| 1086 | FALSE, /* partial_inplace */ |
| 1087 | 0, /* src_mask */ |
| 1088 | 0xffff, /* dst_mask */ |
| 1089 | FALSE), /* pcrel_offset */ |
| 1090 | |
| 1091 | /* The remaining relocs are from the Embedded ELF ABI, and are not |
| 1092 | in the SVR4 ELF ABI. */ |
| 1093 | |
| 1094 | /* 32 bit value resulting from the addend minus the symbol. */ |
| 1095 | HOWTO (R_PPC_EMB_NADDR32, /* type */ |
| 1096 | 0, /* rightshift */ |
| 1097 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1098 | 32, /* bitsize */ |
| 1099 | FALSE, /* pc_relative */ |
| 1100 | 0, /* bitpos */ |
| 1101 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1102 | bfd_elf_generic_reloc, /* special_function */ |
| 1103 | "R_PPC_EMB_NADDR32", /* name */ |
| 1104 | FALSE, /* partial_inplace */ |
| 1105 | 0, /* src_mask */ |
| 1106 | 0xffffffff, /* dst_mask */ |
| 1107 | FALSE), /* pcrel_offset */ |
| 1108 | |
| 1109 | /* 16 bit value resulting from the addend minus the symbol. */ |
| 1110 | HOWTO (R_PPC_EMB_NADDR16, /* type */ |
| 1111 | 0, /* rightshift */ |
| 1112 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1113 | 16, /* bitsize */ |
| 1114 | FALSE, /* pc_relative */ |
| 1115 | 0, /* bitpos */ |
| 1116 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1117 | bfd_elf_generic_reloc, /* special_function */ |
| 1118 | "R_PPC_EMB_NADDR16", /* name */ |
| 1119 | FALSE, /* partial_inplace */ |
| 1120 | 0, /* src_mask */ |
| 1121 | 0xffff, /* dst_mask */ |
| 1122 | FALSE), /* pcrel_offset */ |
| 1123 | |
| 1124 | /* 16 bit value resulting from the addend minus the symbol. */ |
| 1125 | HOWTO (R_PPC_EMB_NADDR16_LO, /* type */ |
| 1126 | 0, /* rightshift */ |
| 1127 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1128 | 16, /* bitsize */ |
| 1129 | FALSE, /* pc_relative */ |
| 1130 | 0, /* bitpos */ |
| 1131 | complain_overflow_dont,/* complain_on_overflow */ |
| 1132 | bfd_elf_generic_reloc, /* special_function */ |
| 1133 | "R_PPC_EMB_ADDR16_LO", /* name */ |
| 1134 | FALSE, /* partial_inplace */ |
| 1135 | 0, /* src_mask */ |
| 1136 | 0xffff, /* dst_mask */ |
| 1137 | FALSE), /* pcrel_offset */ |
| 1138 | |
| 1139 | /* The high order 16 bits of the addend minus the symbol. */ |
| 1140 | HOWTO (R_PPC_EMB_NADDR16_HI, /* type */ |
| 1141 | 16, /* rightshift */ |
| 1142 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1143 | 16, /* bitsize */ |
| 1144 | FALSE, /* pc_relative */ |
| 1145 | 0, /* bitpos */ |
| 1146 | complain_overflow_dont, /* complain_on_overflow */ |
| 1147 | bfd_elf_generic_reloc, /* special_function */ |
| 1148 | "R_PPC_EMB_NADDR16_HI", /* name */ |
| 1149 | FALSE, /* partial_inplace */ |
| 1150 | 0, /* src_mask */ |
| 1151 | 0xffff, /* dst_mask */ |
| 1152 | FALSE), /* pcrel_offset */ |
| 1153 | |
| 1154 | /* The high order 16 bits of the result of the addend minus the address, |
| 1155 | plus 1 if the contents of the low 16 bits, treated as a signed number, |
| 1156 | is negative. */ |
| 1157 | HOWTO (R_PPC_EMB_NADDR16_HA, /* type */ |
| 1158 | 16, /* rightshift */ |
| 1159 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1160 | 16, /* bitsize */ |
| 1161 | FALSE, /* pc_relative */ |
| 1162 | 0, /* bitpos */ |
| 1163 | complain_overflow_dont, /* complain_on_overflow */ |
| 1164 | ppc_elf_addr16_ha_reloc, /* special_function */ |
| 1165 | "R_PPC_EMB_NADDR16_HA", /* name */ |
| 1166 | FALSE, /* partial_inplace */ |
| 1167 | 0, /* src_mask */ |
| 1168 | 0xffff, /* dst_mask */ |
| 1169 | FALSE), /* pcrel_offset */ |
| 1170 | |
| 1171 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 1172 | address in the .sdata section, and returning the offset from |
| 1173 | _SDA_BASE_ for that relocation. */ |
| 1174 | HOWTO (R_PPC_EMB_SDAI16, /* type */ |
| 1175 | 0, /* rightshift */ |
| 1176 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1177 | 16, /* bitsize */ |
| 1178 | FALSE, /* pc_relative */ |
| 1179 | 0, /* bitpos */ |
| 1180 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1181 | bfd_elf_generic_reloc, /* special_function */ |
| 1182 | "R_PPC_EMB_SDAI16", /* name */ |
| 1183 | FALSE, /* partial_inplace */ |
| 1184 | 0, /* src_mask */ |
| 1185 | 0xffff, /* dst_mask */ |
| 1186 | FALSE), /* pcrel_offset */ |
| 1187 | |
| 1188 | /* 16 bit value resulting from allocating a 4 byte word to hold an |
| 1189 | address in the .sdata2 section, and returning the offset from |
| 1190 | _SDA2_BASE_ for that relocation. */ |
| 1191 | HOWTO (R_PPC_EMB_SDA2I16, /* type */ |
| 1192 | 0, /* rightshift */ |
| 1193 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1194 | 16, /* bitsize */ |
| 1195 | FALSE, /* pc_relative */ |
| 1196 | 0, /* bitpos */ |
| 1197 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 1198 | bfd_elf_generic_reloc, /* special_function */ |
| 1199 | "R_PPC_EMB_SDA2I16", /* name */ |
| 1200 | FALSE, /* partial_inplace */ |
| 1201 | 0, /* src_mask */ |
| 1202 | 0xffff, /* dst_mask */ |
| 1203 | FALSE), /* pcrel_offset */ |
| 1204 | |
| 1205 | /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with |
| 1206 | small data items. */ |
| 1207 | HOWTO (R_PPC_EMB_SDA2REL, /* type */ |
| 1208 | 0, /* rightshift */ |
| 1209 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1210 | 16, /* bitsize */ |
| 1211 | FALSE, /* pc_relative */ |
| 1212 | 0, /* bitpos */ |
| 1213 | complain_overflow_signed, /* complain_on_overflow */ |
| 1214 | bfd_elf_generic_reloc, /* special_function */ |
| 1215 | "R_PPC_EMB_SDA2REL", /* name */ |
| 1216 | FALSE, /* partial_inplace */ |
| 1217 | 0, /* src_mask */ |
| 1218 | 0xffff, /* dst_mask */ |
| 1219 | FALSE), /* pcrel_offset */ |
| 1220 | |
| 1221 | /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit |
| 1222 | signed offset from the appropriate base, and filling in the register |
| 1223 | field with the appropriate register (0, 2, or 13). */ |
| 1224 | HOWTO (R_PPC_EMB_SDA21, /* type */ |
| 1225 | 0, /* rightshift */ |
| 1226 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1227 | 16, /* bitsize */ |
| 1228 | FALSE, /* pc_relative */ |
| 1229 | 0, /* bitpos */ |
| 1230 | complain_overflow_signed, /* complain_on_overflow */ |
| 1231 | bfd_elf_generic_reloc, /* special_function */ |
| 1232 | "R_PPC_EMB_SDA21", /* name */ |
| 1233 | FALSE, /* partial_inplace */ |
| 1234 | 0, /* src_mask */ |
| 1235 | 0xffff, /* dst_mask */ |
| 1236 | FALSE), /* pcrel_offset */ |
| 1237 | |
| 1238 | /* Relocation not handled: R_PPC_EMB_MRKREF */ |
| 1239 | /* Relocation not handled: R_PPC_EMB_RELSEC16 */ |
| 1240 | /* Relocation not handled: R_PPC_EMB_RELST_LO */ |
| 1241 | /* Relocation not handled: R_PPC_EMB_RELST_HI */ |
| 1242 | /* Relocation not handled: R_PPC_EMB_RELST_HA */ |
| 1243 | /* Relocation not handled: R_PPC_EMB_BIT_FLD */ |
| 1244 | |
| 1245 | /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling |
| 1246 | in the 16 bit signed offset from the appropriate base, and filling in the |
| 1247 | register field with the appropriate register (0, 2, or 13). */ |
| 1248 | HOWTO (R_PPC_EMB_RELSDA, /* type */ |
| 1249 | 0, /* rightshift */ |
| 1250 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1251 | 16, /* bitsize */ |
| 1252 | TRUE, /* pc_relative */ |
| 1253 | 0, /* bitpos */ |
| 1254 | complain_overflow_signed, /* complain_on_overflow */ |
| 1255 | bfd_elf_generic_reloc, /* special_function */ |
| 1256 | "R_PPC_EMB_RELSDA", /* name */ |
| 1257 | FALSE, /* partial_inplace */ |
| 1258 | 0, /* src_mask */ |
| 1259 | 0xffff, /* dst_mask */ |
| 1260 | FALSE), /* pcrel_offset */ |
| 1261 | |
| 1262 | /* GNU extension to record C++ vtable hierarchy. */ |
| 1263 | HOWTO (R_PPC_GNU_VTINHERIT, /* type */ |
| 1264 | 0, /* rightshift */ |
| 1265 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1266 | 0, /* bitsize */ |
| 1267 | FALSE, /* pc_relative */ |
| 1268 | 0, /* bitpos */ |
| 1269 | complain_overflow_dont, /* complain_on_overflow */ |
| 1270 | NULL, /* special_function */ |
| 1271 | "R_PPC_GNU_VTINHERIT", /* name */ |
| 1272 | FALSE, /* partial_inplace */ |
| 1273 | 0, /* src_mask */ |
| 1274 | 0, /* dst_mask */ |
| 1275 | FALSE), /* pcrel_offset */ |
| 1276 | |
| 1277 | /* GNU extension to record C++ vtable member usage. */ |
| 1278 | HOWTO (R_PPC_GNU_VTENTRY, /* type */ |
| 1279 | 0, /* rightshift */ |
| 1280 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1281 | 0, /* bitsize */ |
| 1282 | FALSE, /* pc_relative */ |
| 1283 | 0, /* bitpos */ |
| 1284 | complain_overflow_dont, /* complain_on_overflow */ |
| 1285 | NULL, /* special_function */ |
| 1286 | "R_PPC_GNU_VTENTRY", /* name */ |
| 1287 | FALSE, /* partial_inplace */ |
| 1288 | 0, /* src_mask */ |
| 1289 | 0, /* dst_mask */ |
| 1290 | FALSE), /* pcrel_offset */ |
| 1291 | |
| 1292 | /* Phony reloc to handle AIX style TOC entries. */ |
| 1293 | HOWTO (R_PPC_TOC16, /* type */ |
| 1294 | 0, /* rightshift */ |
| 1295 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1296 | 16, /* bitsize */ |
| 1297 | FALSE, /* pc_relative */ |
| 1298 | 0, /* bitpos */ |
| 1299 | complain_overflow_signed, /* complain_on_overflow */ |
| 1300 | bfd_elf_generic_reloc, /* special_function */ |
| 1301 | "R_PPC_TOC16", /* name */ |
| 1302 | FALSE, /* partial_inplace */ |
| 1303 | 0, /* src_mask */ |
| 1304 | 0xffff, /* dst_mask */ |
| 1305 | FALSE), /* pcrel_offset */ |
| 1306 | }; |
| 1307 | \f |
| 1308 | /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */ |
| 1309 | |
| 1310 | static void |
| 1311 | ppc_elf_howto_init (void) |
| 1312 | { |
| 1313 | unsigned int i, type; |
| 1314 | |
| 1315 | for (i = 0; |
| 1316 | i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); |
| 1317 | i++) |
| 1318 | { |
| 1319 | type = ppc_elf_howto_raw[i].type; |
| 1320 | if (type >= (sizeof (ppc_elf_howto_table) |
| 1321 | / sizeof (ppc_elf_howto_table[0]))) |
| 1322 | abort (); |
| 1323 | ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i]; |
| 1324 | } |
| 1325 | } |
| 1326 | |
| 1327 | static reloc_howto_type * |
| 1328 | ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1329 | bfd_reloc_code_real_type code) |
| 1330 | { |
| 1331 | enum elf_ppc_reloc_type r; |
| 1332 | |
| 1333 | /* Initialize howto table if not already done. */ |
| 1334 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 1335 | ppc_elf_howto_init (); |
| 1336 | |
| 1337 | switch (code) |
| 1338 | { |
| 1339 | default: |
| 1340 | return NULL; |
| 1341 | |
| 1342 | case BFD_RELOC_NONE: r = R_PPC_NONE; break; |
| 1343 | case BFD_RELOC_32: r = R_PPC_ADDR32; break; |
| 1344 | case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; |
| 1345 | case BFD_RELOC_16: r = R_PPC_ADDR16; break; |
| 1346 | case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; |
| 1347 | case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; |
| 1348 | case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; |
| 1349 | case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break; |
| 1350 | case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break; |
| 1351 | case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break; |
| 1352 | case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break; |
| 1353 | case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; |
| 1354 | case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; |
| 1355 | case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; |
| 1356 | case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; |
| 1357 | case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; |
| 1358 | case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; |
| 1359 | case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; |
| 1360 | case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break; |
| 1361 | case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break; |
| 1362 | case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break; |
| 1363 | case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break; |
| 1364 | case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; |
| 1365 | case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; |
| 1366 | case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; |
| 1367 | case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; |
| 1368 | case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; |
| 1369 | case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; |
| 1370 | case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; |
| 1371 | case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; |
| 1372 | case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; |
| 1373 | case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; |
| 1374 | case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; |
| 1375 | case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; |
| 1376 | case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; |
| 1377 | case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; |
| 1378 | case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; |
| 1379 | case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; |
| 1380 | case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; |
| 1381 | case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; |
| 1382 | case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; |
| 1383 | case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; |
| 1384 | case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; |
| 1385 | case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; |
| 1386 | case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; |
| 1387 | case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; |
| 1388 | case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break; |
| 1389 | case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break; |
| 1390 | case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break; |
| 1391 | case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break; |
| 1392 | case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break; |
| 1393 | case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break; |
| 1394 | case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break; |
| 1395 | case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break; |
| 1396 | case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break; |
| 1397 | case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break; |
| 1398 | case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break; |
| 1399 | case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break; |
| 1400 | case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break; |
| 1401 | case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break; |
| 1402 | case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break; |
| 1403 | case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break; |
| 1404 | case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break; |
| 1405 | case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break; |
| 1406 | case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break; |
| 1407 | case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break; |
| 1408 | case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break; |
| 1409 | case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break; |
| 1410 | case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break; |
| 1411 | case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break; |
| 1412 | case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break; |
| 1413 | case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break; |
| 1414 | case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break; |
| 1415 | case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break; |
| 1416 | case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break; |
| 1417 | case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break; |
| 1418 | case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break; |
| 1419 | case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break; |
| 1420 | case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break; |
| 1421 | case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break; |
| 1422 | case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break; |
| 1423 | } |
| 1424 | |
| 1425 | return ppc_elf_howto_table[r]; |
| 1426 | }; |
| 1427 | |
| 1428 | /* Set the howto pointer for a PowerPC ELF reloc. */ |
| 1429 | |
| 1430 | static void |
| 1431 | ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 1432 | arelent *cache_ptr, |
| 1433 | Elf_Internal_Rela *dst) |
| 1434 | { |
| 1435 | /* Initialize howto table if not already done. */ |
| 1436 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 1437 | ppc_elf_howto_init (); |
| 1438 | |
| 1439 | BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max); |
| 1440 | cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)]; |
| 1441 | } |
| 1442 | |
| 1443 | /* Handle the R_PPC_ADDR16_HA reloc. */ |
| 1444 | |
| 1445 | static bfd_reloc_status_type |
| 1446 | ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
| 1447 | arelent *reloc_entry, |
| 1448 | asymbol *symbol, |
| 1449 | void *data ATTRIBUTE_UNUSED, |
| 1450 | asection *input_section, |
| 1451 | bfd *output_bfd, |
| 1452 | char **error_message ATTRIBUTE_UNUSED) |
| 1453 | { |
| 1454 | bfd_vma relocation; |
| 1455 | |
| 1456 | if (output_bfd != NULL) |
| 1457 | { |
| 1458 | reloc_entry->address += input_section->output_offset; |
| 1459 | return bfd_reloc_ok; |
| 1460 | } |
| 1461 | |
| 1462 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
| 1463 | return bfd_reloc_outofrange; |
| 1464 | |
| 1465 | if (bfd_is_com_section (symbol->section)) |
| 1466 | relocation = 0; |
| 1467 | else |
| 1468 | relocation = symbol->value; |
| 1469 | |
| 1470 | relocation += symbol->section->output_section->vma; |
| 1471 | relocation += symbol->section->output_offset; |
| 1472 | relocation += reloc_entry->addend; |
| 1473 | |
| 1474 | reloc_entry->addend += (relocation & 0x8000) << 1; |
| 1475 | |
| 1476 | return bfd_reloc_continue; |
| 1477 | } |
| 1478 | |
| 1479 | static bfd_reloc_status_type |
| 1480 | ppc_elf_unhandled_reloc (bfd *abfd, |
| 1481 | arelent *reloc_entry, |
| 1482 | asymbol *symbol, |
| 1483 | void *data, |
| 1484 | asection *input_section, |
| 1485 | bfd *output_bfd, |
| 1486 | char **error_message) |
| 1487 | { |
| 1488 | /* If this is a relocatable link (output_bfd test tells us), just |
| 1489 | call the generic function. Any adjustment will be done at final |
| 1490 | link time. */ |
| 1491 | if (output_bfd != NULL) |
| 1492 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| 1493 | input_section, output_bfd, error_message); |
| 1494 | |
| 1495 | if (error_message != NULL) |
| 1496 | { |
| 1497 | static char buf[60]; |
| 1498 | sprintf (buf, _("generic linker can't handle %s"), |
| 1499 | reloc_entry->howto->name); |
| 1500 | *error_message = buf; |
| 1501 | } |
| 1502 | return bfd_reloc_dangerous; |
| 1503 | } |
| 1504 | \f |
| 1505 | /* Sections created by the linker. */ |
| 1506 | |
| 1507 | typedef struct elf_linker_section |
| 1508 | { |
| 1509 | /* Pointer to the bfd section. */ |
| 1510 | asection *section; |
| 1511 | /* Section name. */ |
| 1512 | const char *name; |
| 1513 | /* Associated bss section name. */ |
| 1514 | const char *bss_name; |
| 1515 | /* Associated symbol name. */ |
| 1516 | const char *sym_name; |
| 1517 | /* Value of symbol. */ |
| 1518 | bfd_vma sym_val; |
| 1519 | } elf_linker_section_t; |
| 1520 | |
| 1521 | /* Linked list of allocated pointer entries. This hangs off of the |
| 1522 | symbol lists, and provides allows us to return different pointers, |
| 1523 | based on different addend's. */ |
| 1524 | |
| 1525 | typedef struct elf_linker_section_pointers |
| 1526 | { |
| 1527 | /* next allocated pointer for this symbol */ |
| 1528 | struct elf_linker_section_pointers *next; |
| 1529 | /* offset of pointer from beginning of section */ |
| 1530 | bfd_vma offset; |
| 1531 | /* addend used */ |
| 1532 | bfd_vma addend; |
| 1533 | /* which linker section this is */ |
| 1534 | elf_linker_section_t *lsect; |
| 1535 | } elf_linker_section_pointers_t; |
| 1536 | |
| 1537 | struct ppc_elf_obj_tdata |
| 1538 | { |
| 1539 | struct elf_obj_tdata elf; |
| 1540 | |
| 1541 | /* A mapping from local symbols to offsets into the various linker |
| 1542 | sections added. This is index by the symbol index. */ |
| 1543 | elf_linker_section_pointers_t **linker_section_pointers; |
| 1544 | }; |
| 1545 | |
| 1546 | #define ppc_elf_tdata(bfd) \ |
| 1547 | ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any) |
| 1548 | |
| 1549 | #define elf_local_ptr_offsets(bfd) \ |
| 1550 | (ppc_elf_tdata (bfd)->linker_section_pointers) |
| 1551 | |
| 1552 | /* Override the generic function because we store some extras. */ |
| 1553 | |
| 1554 | static bfd_boolean |
| 1555 | ppc_elf_mkobject (bfd *abfd) |
| 1556 | { |
| 1557 | bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata); |
| 1558 | abfd->tdata.any = bfd_zalloc (abfd, amt); |
| 1559 | if (abfd->tdata.any == NULL) |
| 1560 | return FALSE; |
| 1561 | return TRUE; |
| 1562 | } |
| 1563 | |
| 1564 | /* Fix bad default arch selected for a 32 bit input bfd when the |
| 1565 | default is 64 bit. */ |
| 1566 | |
| 1567 | static bfd_boolean |
| 1568 | ppc_elf_object_p (bfd *abfd) |
| 1569 | { |
| 1570 | if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64) |
| 1571 | { |
| 1572 | Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); |
| 1573 | |
| 1574 | if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32) |
| 1575 | { |
| 1576 | /* Relies on arch after 64 bit default being 32 bit default. */ |
| 1577 | abfd->arch_info = abfd->arch_info->next; |
| 1578 | BFD_ASSERT (abfd->arch_info->bits_per_word == 32); |
| 1579 | } |
| 1580 | } |
| 1581 | return TRUE; |
| 1582 | } |
| 1583 | |
| 1584 | /* Function to set whether a module needs the -mrelocatable bit set. */ |
| 1585 | |
| 1586 | static bfd_boolean |
| 1587 | ppc_elf_set_private_flags (bfd *abfd, flagword flags) |
| 1588 | { |
| 1589 | BFD_ASSERT (!elf_flags_init (abfd) |
| 1590 | || elf_elfheader (abfd)->e_flags == flags); |
| 1591 | |
| 1592 | elf_elfheader (abfd)->e_flags = flags; |
| 1593 | elf_flags_init (abfd) = TRUE; |
| 1594 | return TRUE; |
| 1595 | } |
| 1596 | |
| 1597 | /* Support for core dump NOTE sections. */ |
| 1598 | |
| 1599 | static bfd_boolean |
| 1600 | ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 1601 | { |
| 1602 | int offset; |
| 1603 | unsigned int size; |
| 1604 | |
| 1605 | switch (note->descsz) |
| 1606 | { |
| 1607 | default: |
| 1608 | return FALSE; |
| 1609 | |
| 1610 | case 268: /* Linux/PPC. */ |
| 1611 | /* pr_cursig */ |
| 1612 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); |
| 1613 | |
| 1614 | /* pr_pid */ |
| 1615 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); |
| 1616 | |
| 1617 | /* pr_reg */ |
| 1618 | offset = 72; |
| 1619 | size = 192; |
| 1620 | |
| 1621 | break; |
| 1622 | } |
| 1623 | |
| 1624 | /* Make a ".reg/999" section. */ |
| 1625 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 1626 | size, note->descpos + offset); |
| 1627 | } |
| 1628 | |
| 1629 | static bfd_boolean |
| 1630 | ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 1631 | { |
| 1632 | switch (note->descsz) |
| 1633 | { |
| 1634 | default: |
| 1635 | return FALSE; |
| 1636 | |
| 1637 | case 128: /* Linux/PPC elf_prpsinfo. */ |
| 1638 | elf_tdata (abfd)->core_program |
| 1639 | = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16); |
| 1640 | elf_tdata (abfd)->core_command |
| 1641 | = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80); |
| 1642 | } |
| 1643 | |
| 1644 | /* Note that for some reason, a spurious space is tacked |
| 1645 | onto the end of the args in some (at least one anyway) |
| 1646 | implementations, so strip it off if it exists. */ |
| 1647 | |
| 1648 | { |
| 1649 | char *command = elf_tdata (abfd)->core_command; |
| 1650 | int n = strlen (command); |
| 1651 | |
| 1652 | if (0 < n && command[n - 1] == ' ') |
| 1653 | command[n - 1] = '\0'; |
| 1654 | } |
| 1655 | |
| 1656 | return TRUE; |
| 1657 | } |
| 1658 | |
| 1659 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 1660 | or (bfd_vma) -1 if it should not be included. */ |
| 1661 | |
| 1662 | static bfd_vma |
| 1663 | ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, |
| 1664 | const asection *plt ATTRIBUTE_UNUSED, |
| 1665 | const arelent *rel) |
| 1666 | { |
| 1667 | return rel->address; |
| 1668 | } |
| 1669 | |
| 1670 | /* Handle a PowerPC specific section when reading an object file. This |
| 1671 | is called when bfd_section_from_shdr finds a section with an unknown |
| 1672 | type. */ |
| 1673 | |
| 1674 | static bfd_boolean |
| 1675 | ppc_elf_section_from_shdr (bfd *abfd, |
| 1676 | Elf_Internal_Shdr *hdr, |
| 1677 | const char *name, |
| 1678 | int shindex) |
| 1679 | { |
| 1680 | asection *newsect; |
| 1681 | flagword flags; |
| 1682 | |
| 1683 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 1684 | return FALSE; |
| 1685 | |
| 1686 | newsect = hdr->bfd_section; |
| 1687 | flags = bfd_get_section_flags (abfd, newsect); |
| 1688 | if (hdr->sh_flags & SHF_EXCLUDE) |
| 1689 | flags |= SEC_EXCLUDE; |
| 1690 | |
| 1691 | if (hdr->sh_type == SHT_ORDERED) |
| 1692 | flags |= SEC_SORT_ENTRIES; |
| 1693 | |
| 1694 | bfd_set_section_flags (abfd, newsect, flags); |
| 1695 | return TRUE; |
| 1696 | } |
| 1697 | |
| 1698 | /* Set up any other section flags and such that may be necessary. */ |
| 1699 | |
| 1700 | static bfd_boolean |
| 1701 | ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| 1702 | Elf_Internal_Shdr *shdr, |
| 1703 | asection *asect) |
| 1704 | { |
| 1705 | if ((asect->flags & SEC_EXCLUDE) != 0) |
| 1706 | shdr->sh_flags |= SHF_EXCLUDE; |
| 1707 | |
| 1708 | if ((asect->flags & SEC_SORT_ENTRIES) != 0) |
| 1709 | shdr->sh_type = SHT_ORDERED; |
| 1710 | |
| 1711 | return TRUE; |
| 1712 | } |
| 1713 | |
| 1714 | /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we |
| 1715 | need to bump up the number of section headers. */ |
| 1716 | |
| 1717 | static int |
| 1718 | ppc_elf_additional_program_headers (bfd *abfd) |
| 1719 | { |
| 1720 | asection *s; |
| 1721 | int ret = 0; |
| 1722 | |
| 1723 | s = bfd_get_section_by_name (abfd, ".sbss2"); |
| 1724 | if (s != NULL && (s->flags & SEC_ALLOC) != 0) |
| 1725 | ++ret; |
| 1726 | |
| 1727 | s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0"); |
| 1728 | if (s != NULL && (s->flags & SEC_ALLOC) != 0) |
| 1729 | ++ret; |
| 1730 | |
| 1731 | return ret; |
| 1732 | } |
| 1733 | |
| 1734 | /* Add extra PPC sections -- Note, for now, make .sbss2 and |
| 1735 | .PPC.EMB.sbss0 a normal section, and not a bss section so |
| 1736 | that the linker doesn't crater when trying to make more than |
| 1737 | 2 sections. */ |
| 1738 | |
| 1739 | static struct bfd_elf_special_section const ppc_elf_special_sections[]= |
| 1740 | { |
| 1741 | { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC }, |
| 1742 | { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 1743 | { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
| 1744 | { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC }, |
| 1745 | { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC }, |
| 1746 | { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 }, |
| 1747 | { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC }, |
| 1748 | { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC }, |
| 1749 | { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR }, |
| 1750 | { NULL, 0, 0, 0, 0 } |
| 1751 | }; |
| 1752 | \f |
| 1753 | /* Very simple linked list structure for recording apuinfo values. */ |
| 1754 | typedef struct apuinfo_list |
| 1755 | { |
| 1756 | struct apuinfo_list *next; |
| 1757 | unsigned long value; |
| 1758 | } |
| 1759 | apuinfo_list; |
| 1760 | |
| 1761 | static apuinfo_list *head; |
| 1762 | |
| 1763 | |
| 1764 | static void |
| 1765 | apuinfo_list_init (void) |
| 1766 | { |
| 1767 | head = NULL; |
| 1768 | } |
| 1769 | |
| 1770 | static void |
| 1771 | apuinfo_list_add (unsigned long value) |
| 1772 | { |
| 1773 | apuinfo_list *entry = head; |
| 1774 | |
| 1775 | while (entry != NULL) |
| 1776 | { |
| 1777 | if (entry->value == value) |
| 1778 | return; |
| 1779 | entry = entry->next; |
| 1780 | } |
| 1781 | |
| 1782 | entry = bfd_malloc (sizeof (* entry)); |
| 1783 | if (entry == NULL) |
| 1784 | return; |
| 1785 | |
| 1786 | entry->value = value; |
| 1787 | entry->next = head; |
| 1788 | head = entry; |
| 1789 | } |
| 1790 | |
| 1791 | static unsigned |
| 1792 | apuinfo_list_length (void) |
| 1793 | { |
| 1794 | apuinfo_list *entry; |
| 1795 | unsigned long count; |
| 1796 | |
| 1797 | for (entry = head, count = 0; |
| 1798 | entry; |
| 1799 | entry = entry->next) |
| 1800 | ++ count; |
| 1801 | |
| 1802 | return count; |
| 1803 | } |
| 1804 | |
| 1805 | static inline unsigned long |
| 1806 | apuinfo_list_element (unsigned long number) |
| 1807 | { |
| 1808 | apuinfo_list * entry; |
| 1809 | |
| 1810 | for (entry = head; |
| 1811 | entry && number --; |
| 1812 | entry = entry->next) |
| 1813 | ; |
| 1814 | |
| 1815 | return entry ? entry->value : 0; |
| 1816 | } |
| 1817 | |
| 1818 | static void |
| 1819 | apuinfo_list_finish (void) |
| 1820 | { |
| 1821 | apuinfo_list *entry; |
| 1822 | |
| 1823 | for (entry = head; entry;) |
| 1824 | { |
| 1825 | apuinfo_list *next = entry->next; |
| 1826 | free (entry); |
| 1827 | entry = next; |
| 1828 | } |
| 1829 | |
| 1830 | head = NULL; |
| 1831 | } |
| 1832 | |
| 1833 | #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo" |
| 1834 | #define APUINFO_LABEL "APUinfo" |
| 1835 | |
| 1836 | /* Scan the input BFDs and create a linked list of |
| 1837 | the APUinfo values that will need to be emitted. */ |
| 1838 | |
| 1839 | static void |
| 1840 | ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info) |
| 1841 | { |
| 1842 | bfd *ibfd; |
| 1843 | asection *asec; |
| 1844 | char *buffer; |
| 1845 | unsigned num_input_sections; |
| 1846 | bfd_size_type output_section_size; |
| 1847 | unsigned i; |
| 1848 | unsigned num_entries; |
| 1849 | unsigned long offset; |
| 1850 | unsigned long length; |
| 1851 | const char *error_message = NULL; |
| 1852 | |
| 1853 | if (link_info == NULL) |
| 1854 | return; |
| 1855 | |
| 1856 | /* Scan the input bfds, looking for apuinfo sections. */ |
| 1857 | num_input_sections = 0; |
| 1858 | output_section_size = 0; |
| 1859 | |
| 1860 | for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) |
| 1861 | { |
| 1862 | asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); |
| 1863 | if (asec) |
| 1864 | { |
| 1865 | ++ num_input_sections; |
| 1866 | output_section_size += asec->size; |
| 1867 | } |
| 1868 | } |
| 1869 | |
| 1870 | /* We need at least one input sections |
| 1871 | in order to make merging worthwhile. */ |
| 1872 | if (num_input_sections < 1) |
| 1873 | return; |
| 1874 | |
| 1875 | /* Just make sure that the output section exists as well. */ |
| 1876 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 1877 | if (asec == NULL) |
| 1878 | return; |
| 1879 | |
| 1880 | /* Allocate a buffer for the contents of the input sections. */ |
| 1881 | buffer = bfd_malloc (output_section_size); |
| 1882 | if (buffer == NULL) |
| 1883 | return; |
| 1884 | |
| 1885 | offset = 0; |
| 1886 | apuinfo_list_init (); |
| 1887 | |
| 1888 | /* Read in the input sections contents. */ |
| 1889 | for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next) |
| 1890 | { |
| 1891 | unsigned long datum; |
| 1892 | char *ptr; |
| 1893 | |
| 1894 | asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME); |
| 1895 | if (asec == NULL) |
| 1896 | continue; |
| 1897 | |
| 1898 | length = asec->size; |
| 1899 | if (length < 24) |
| 1900 | { |
| 1901 | error_message = _("corrupt or empty %s section in %B"); |
| 1902 | goto fail; |
| 1903 | } |
| 1904 | |
| 1905 | if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0 |
| 1906 | || (bfd_bread (buffer + offset, length, ibfd) != length)) |
| 1907 | { |
| 1908 | error_message = _("unable to read in %s section from %B"); |
| 1909 | goto fail; |
| 1910 | } |
| 1911 | |
| 1912 | /* Process the contents of the section. */ |
| 1913 | ptr = buffer + offset; |
| 1914 | error_message = _("corrupt %s section in %B"); |
| 1915 | |
| 1916 | /* Verify the contents of the header. Note - we have to |
| 1917 | extract the values this way in order to allow for a |
| 1918 | host whose endian-ness is different from the target. */ |
| 1919 | datum = bfd_get_32 (ibfd, ptr); |
| 1920 | if (datum != sizeof APUINFO_LABEL) |
| 1921 | goto fail; |
| 1922 | |
| 1923 | datum = bfd_get_32 (ibfd, ptr + 8); |
| 1924 | if (datum != 0x2) |
| 1925 | goto fail; |
| 1926 | |
| 1927 | if (strcmp (ptr + 12, APUINFO_LABEL) != 0) |
| 1928 | goto fail; |
| 1929 | |
| 1930 | /* Get the number of bytes used for apuinfo entries. */ |
| 1931 | datum = bfd_get_32 (ibfd, ptr + 4); |
| 1932 | if (datum + 20 != length) |
| 1933 | goto fail; |
| 1934 | |
| 1935 | /* Make sure that we do not run off the end of the section. */ |
| 1936 | if (offset + length > output_section_size) |
| 1937 | goto fail; |
| 1938 | |
| 1939 | /* Scan the apuinfo section, building a list of apuinfo numbers. */ |
| 1940 | for (i = 0; i < datum; i += 4) |
| 1941 | apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i)); |
| 1942 | |
| 1943 | /* Update the offset. */ |
| 1944 | offset += length; |
| 1945 | } |
| 1946 | |
| 1947 | error_message = NULL; |
| 1948 | |
| 1949 | /* Compute the size of the output section. */ |
| 1950 | num_entries = apuinfo_list_length (); |
| 1951 | output_section_size = 20 + num_entries * 4; |
| 1952 | |
| 1953 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 1954 | |
| 1955 | if (! bfd_set_section_size (abfd, asec, output_section_size)) |
| 1956 | ibfd = abfd, |
| 1957 | error_message = _("warning: unable to set size of %s section in %B"); |
| 1958 | |
| 1959 | fail: |
| 1960 | free (buffer); |
| 1961 | |
| 1962 | if (error_message) |
| 1963 | (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME); |
| 1964 | } |
| 1965 | |
| 1966 | /* Prevent the output section from accumulating the input sections' |
| 1967 | contents. We have already stored this in our linked list structure. */ |
| 1968 | |
| 1969 | static bfd_boolean |
| 1970 | ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED, |
| 1971 | asection *asec, |
| 1972 | bfd_byte *contents ATTRIBUTE_UNUSED) |
| 1973 | { |
| 1974 | return (apuinfo_list_length () |
| 1975 | && strcmp (asec->name, APUINFO_SECTION_NAME) == 0); |
| 1976 | } |
| 1977 | |
| 1978 | /* Finally we can generate the output section. */ |
| 1979 | |
| 1980 | static void |
| 1981 | ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) |
| 1982 | { |
| 1983 | bfd_byte *buffer; |
| 1984 | asection *asec; |
| 1985 | unsigned i; |
| 1986 | unsigned num_entries; |
| 1987 | bfd_size_type length; |
| 1988 | |
| 1989 | asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME); |
| 1990 | if (asec == NULL) |
| 1991 | return; |
| 1992 | |
| 1993 | if (apuinfo_list_length () == 0) |
| 1994 | return; |
| 1995 | |
| 1996 | length = asec->size; |
| 1997 | if (length < 20) |
| 1998 | return; |
| 1999 | |
| 2000 | buffer = bfd_malloc (length); |
| 2001 | if (buffer == NULL) |
| 2002 | { |
| 2003 | (*_bfd_error_handler) |
| 2004 | (_("failed to allocate space for new APUinfo section.")); |
| 2005 | return; |
| 2006 | } |
| 2007 | |
| 2008 | /* Create the apuinfo header. */ |
| 2009 | num_entries = apuinfo_list_length (); |
| 2010 | bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer); |
| 2011 | bfd_put_32 (abfd, num_entries * 4, buffer + 4); |
| 2012 | bfd_put_32 (abfd, 0x2, buffer + 8); |
| 2013 | strcpy ((char *) buffer + 12, APUINFO_LABEL); |
| 2014 | |
| 2015 | length = 20; |
| 2016 | for (i = 0; i < num_entries; i++) |
| 2017 | { |
| 2018 | bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length); |
| 2019 | length += 4; |
| 2020 | } |
| 2021 | |
| 2022 | if (length != asec->size) |
| 2023 | (*_bfd_error_handler) (_("failed to compute new APUinfo section.")); |
| 2024 | |
| 2025 | if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length)) |
| 2026 | (*_bfd_error_handler) (_("failed to install new APUinfo section.")); |
| 2027 | |
| 2028 | free (buffer); |
| 2029 | |
| 2030 | apuinfo_list_finish (); |
| 2031 | } |
| 2032 | \f |
| 2033 | /* The following functions are specific to the ELF linker, while |
| 2034 | functions above are used generally. They appear in this file more |
| 2035 | or less in the order in which they are called. eg. |
| 2036 | ppc_elf_check_relocs is called early in the link process, |
| 2037 | ppc_elf_finish_dynamic_sections is one of the last functions |
| 2038 | called. */ |
| 2039 | |
| 2040 | /* The PPC linker needs to keep track of the number of relocs that it |
| 2041 | decides to copy as dynamic relocs in check_relocs for each symbol. |
| 2042 | This is so that it can later discard them if they are found to be |
| 2043 | unnecessary. We store the information in a field extending the |
| 2044 | regular ELF linker hash table. */ |
| 2045 | |
| 2046 | struct ppc_elf_dyn_relocs |
| 2047 | { |
| 2048 | struct ppc_elf_dyn_relocs *next; |
| 2049 | |
| 2050 | /* The input section of the reloc. */ |
| 2051 | asection *sec; |
| 2052 | |
| 2053 | /* Total number of relocs copied for the input section. */ |
| 2054 | bfd_size_type count; |
| 2055 | |
| 2056 | /* Number of pc-relative relocs copied for the input section. */ |
| 2057 | bfd_size_type pc_count; |
| 2058 | }; |
| 2059 | |
| 2060 | /* Of those relocs that might be copied as dynamic relocs, this macro |
| 2061 | selects those that must be copied when linking a shared library, |
| 2062 | even when the symbol is local. */ |
| 2063 | |
| 2064 | #define MUST_BE_DYN_RELOC(RTYPE) \ |
| 2065 | ((RTYPE) != R_PPC_REL24 \ |
| 2066 | && (RTYPE) != R_PPC_REL14 \ |
| 2067 | && (RTYPE) != R_PPC_REL14_BRTAKEN \ |
| 2068 | && (RTYPE) != R_PPC_REL14_BRNTAKEN \ |
| 2069 | && (RTYPE) != R_PPC_REL32) |
| 2070 | |
| 2071 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| 2072 | copying dynamic variables from a shared lib into an app's dynbss |
| 2073 | section, and instead use a dynamic relocation to point into the |
| 2074 | shared lib. */ |
| 2075 | #define ELIMINATE_COPY_RELOCS 1 |
| 2076 | |
| 2077 | /* PPC ELF linker hash entry. */ |
| 2078 | |
| 2079 | struct ppc_elf_link_hash_entry |
| 2080 | { |
| 2081 | struct elf_link_hash_entry elf; |
| 2082 | |
| 2083 | /* If this symbol is used in the linker created sections, the processor |
| 2084 | specific backend uses this field to map the field into the offset |
| 2085 | from the beginning of the section. */ |
| 2086 | elf_linker_section_pointers_t *linker_section_pointer; |
| 2087 | |
| 2088 | /* Track dynamic relocs copied for this symbol. */ |
| 2089 | struct ppc_elf_dyn_relocs *dyn_relocs; |
| 2090 | |
| 2091 | /* Contexts in which symbol is used in the GOT (or TOC). |
| 2092 | TLS_GD .. TLS_TLS bits are or'd into the mask as the |
| 2093 | corresponding relocs are encountered during check_relocs. |
| 2094 | tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to |
| 2095 | indicate the corresponding GOT entry type is not needed. */ |
| 2096 | #define TLS_GD 1 /* GD reloc. */ |
| 2097 | #define TLS_LD 2 /* LD reloc. */ |
| 2098 | #define TLS_TPREL 4 /* TPREL reloc, => IE. */ |
| 2099 | #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ |
| 2100 | #define TLS_TLS 16 /* Any TLS reloc. */ |
| 2101 | #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */ |
| 2102 | char tls_mask; |
| 2103 | }; |
| 2104 | |
| 2105 | #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) |
| 2106 | |
| 2107 | /* PPC ELF linker hash table. */ |
| 2108 | |
| 2109 | struct ppc_elf_link_hash_table |
| 2110 | { |
| 2111 | struct elf_link_hash_table elf; |
| 2112 | |
| 2113 | /* Short-cuts to get to dynamic linker sections. */ |
| 2114 | asection *got; |
| 2115 | asection *relgot; |
| 2116 | asection *plt; |
| 2117 | asection *relplt; |
| 2118 | asection *dynbss; |
| 2119 | asection *relbss; |
| 2120 | asection *dynsbss; |
| 2121 | asection *relsbss; |
| 2122 | elf_linker_section_t sdata[2]; |
| 2123 | asection *sbss; |
| 2124 | |
| 2125 | /* Shortcut to .__tls_get_addr. */ |
| 2126 | struct elf_link_hash_entry *tls_get_addr; |
| 2127 | |
| 2128 | /* TLS local dynamic got entry handling. */ |
| 2129 | union { |
| 2130 | bfd_signed_vma refcount; |
| 2131 | bfd_vma offset; |
| 2132 | } tlsld_got; |
| 2133 | |
| 2134 | /* Small local sym to section mapping cache. */ |
| 2135 | struct sym_sec_cache sym_sec; |
| 2136 | }; |
| 2137 | |
| 2138 | /* Get the PPC ELF linker hash table from a link_info structure. */ |
| 2139 | |
| 2140 | #define ppc_elf_hash_table(p) \ |
| 2141 | ((struct ppc_elf_link_hash_table *) (p)->hash) |
| 2142 | |
| 2143 | /* Create an entry in a PPC ELF linker hash table. */ |
| 2144 | |
| 2145 | static struct bfd_hash_entry * |
| 2146 | ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 2147 | struct bfd_hash_table *table, |
| 2148 | const char *string) |
| 2149 | { |
| 2150 | /* Allocate the structure if it has not already been allocated by a |
| 2151 | subclass. */ |
| 2152 | if (entry == NULL) |
| 2153 | { |
| 2154 | entry = bfd_hash_allocate (table, |
| 2155 | sizeof (struct ppc_elf_link_hash_entry)); |
| 2156 | if (entry == NULL) |
| 2157 | return entry; |
| 2158 | } |
| 2159 | |
| 2160 | /* Call the allocation method of the superclass. */ |
| 2161 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 2162 | if (entry != NULL) |
| 2163 | { |
| 2164 | ppc_elf_hash_entry (entry)->linker_section_pointer = NULL; |
| 2165 | ppc_elf_hash_entry (entry)->dyn_relocs = NULL; |
| 2166 | ppc_elf_hash_entry (entry)->tls_mask = 0; |
| 2167 | } |
| 2168 | |
| 2169 | return entry; |
| 2170 | } |
| 2171 | |
| 2172 | /* Create a PPC ELF linker hash table. */ |
| 2173 | |
| 2174 | static struct bfd_link_hash_table * |
| 2175 | ppc_elf_link_hash_table_create (bfd *abfd) |
| 2176 | { |
| 2177 | struct ppc_elf_link_hash_table *ret; |
| 2178 | |
| 2179 | ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table)); |
| 2180 | if (ret == NULL) |
| 2181 | return NULL; |
| 2182 | |
| 2183 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, |
| 2184 | ppc_elf_link_hash_newfunc)) |
| 2185 | { |
| 2186 | free (ret); |
| 2187 | return NULL; |
| 2188 | } |
| 2189 | |
| 2190 | ret->sdata[0].name = ".sdata"; |
| 2191 | ret->sdata[0].sym_name = "_SDA_BASE_"; |
| 2192 | ret->sdata[0].bss_name = ".sbss"; |
| 2193 | |
| 2194 | ret->sdata[1].name = ".sdata2"; |
| 2195 | ret->sdata[1].sym_name = "_SDA2_BASE_"; |
| 2196 | ret->sdata[1].bss_name = ".sbss2"; |
| 2197 | |
| 2198 | return &ret->elf.root; |
| 2199 | } |
| 2200 | |
| 2201 | /* The powerpc .got has a blrl instruction in it. Mark it executable. */ |
| 2202 | |
| 2203 | static bfd_boolean |
| 2204 | ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info) |
| 2205 | { |
| 2206 | struct ppc_elf_link_hash_table *htab; |
| 2207 | asection *s; |
| 2208 | flagword flags; |
| 2209 | |
| 2210 | if (!_bfd_elf_create_got_section (abfd, info)) |
| 2211 | return FALSE; |
| 2212 | |
| 2213 | htab = ppc_elf_hash_table (info); |
| 2214 | htab->got = s = bfd_get_section_by_name (abfd, ".got"); |
| 2215 | if (s == NULL) |
| 2216 | abort (); |
| 2217 | |
| 2218 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 2219 | | SEC_LINKER_CREATED); |
| 2220 | if (!bfd_set_section_flags (abfd, s, flags)) |
| 2221 | return FALSE; |
| 2222 | |
| 2223 | htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", |
| 2224 | SEC_ALLOC | SEC_LOAD |
| 2225 | | SEC_HAS_CONTENTS |
| 2226 | | SEC_IN_MEMORY |
| 2227 | | SEC_LINKER_CREATED |
| 2228 | | SEC_READONLY); |
| 2229 | if (!htab->relgot |
| 2230 | || ! bfd_set_section_alignment (abfd, htab->relgot, 2)) |
| 2231 | return FALSE; |
| 2232 | |
| 2233 | return TRUE; |
| 2234 | } |
| 2235 | |
| 2236 | /* We have to create .dynsbss and .rela.sbss here so that they get mapped |
| 2237 | to output sections (just like _bfd_elf_create_dynamic_sections has |
| 2238 | to create .dynbss and .rela.bss). */ |
| 2239 | |
| 2240 | static bfd_boolean |
| 2241 | ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 2242 | { |
| 2243 | struct ppc_elf_link_hash_table *htab; |
| 2244 | asection *s; |
| 2245 | flagword flags; |
| 2246 | |
| 2247 | htab = ppc_elf_hash_table (info); |
| 2248 | |
| 2249 | if (htab->got == NULL |
| 2250 | && !ppc_elf_create_got (abfd, info)) |
| 2251 | return FALSE; |
| 2252 | |
| 2253 | if (!_bfd_elf_create_dynamic_sections (abfd, info)) |
| 2254 | return FALSE; |
| 2255 | |
| 2256 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 2257 | | SEC_LINKER_CREATED); |
| 2258 | |
| 2259 | htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss"); |
| 2260 | htab->dynsbss = s = bfd_make_section_with_flags (abfd, ".dynsbss", |
| 2261 | SEC_ALLOC |
| 2262 | | SEC_LINKER_CREATED); |
| 2263 | if (s == NULL) |
| 2264 | return FALSE; |
| 2265 | |
| 2266 | if (! info->shared) |
| 2267 | { |
| 2268 | htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss"); |
| 2269 | htab->relsbss = s = bfd_make_section_with_flags (abfd, |
| 2270 | ".rela.sbss", |
| 2271 | flags | SEC_READONLY); |
| 2272 | if (s == NULL |
| 2273 | || ! bfd_set_section_alignment (abfd, s, 2)) |
| 2274 | return FALSE; |
| 2275 | } |
| 2276 | |
| 2277 | htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt"); |
| 2278 | htab->plt = s = bfd_get_section_by_name (abfd, ".plt"); |
| 2279 | if (s == NULL) |
| 2280 | abort (); |
| 2281 | |
| 2282 | flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED; |
| 2283 | return bfd_set_section_flags (abfd, s, flags); |
| 2284 | } |
| 2285 | |
| 2286 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2287 | |
| 2288 | static void |
| 2289 | ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed, |
| 2290 | struct elf_link_hash_entry *dir, |
| 2291 | struct elf_link_hash_entry *ind) |
| 2292 | { |
| 2293 | struct ppc_elf_link_hash_entry *edir, *eind; |
| 2294 | |
| 2295 | edir = (struct ppc_elf_link_hash_entry *) dir; |
| 2296 | eind = (struct ppc_elf_link_hash_entry *) ind; |
| 2297 | |
| 2298 | if (eind->dyn_relocs != NULL) |
| 2299 | { |
| 2300 | if (edir->dyn_relocs != NULL) |
| 2301 | { |
| 2302 | struct ppc_elf_dyn_relocs **pp; |
| 2303 | struct ppc_elf_dyn_relocs *p; |
| 2304 | |
| 2305 | if (ind->root.type == bfd_link_hash_indirect) |
| 2306 | abort (); |
| 2307 | |
| 2308 | /* Add reloc counts against the weak sym to the strong sym |
| 2309 | list. Merge any entries against the same section. */ |
| 2310 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 2311 | { |
| 2312 | struct ppc_elf_dyn_relocs *q; |
| 2313 | |
| 2314 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 2315 | if (q->sec == p->sec) |
| 2316 | { |
| 2317 | q->pc_count += p->pc_count; |
| 2318 | q->count += p->count; |
| 2319 | *pp = p->next; |
| 2320 | break; |
| 2321 | } |
| 2322 | if (q == NULL) |
| 2323 | pp = &p->next; |
| 2324 | } |
| 2325 | *pp = edir->dyn_relocs; |
| 2326 | } |
| 2327 | |
| 2328 | edir->dyn_relocs = eind->dyn_relocs; |
| 2329 | eind->dyn_relocs = NULL; |
| 2330 | } |
| 2331 | |
| 2332 | edir->tls_mask |= eind->tls_mask; |
| 2333 | |
| 2334 | if (ELIMINATE_COPY_RELOCS |
| 2335 | && ind->root.type != bfd_link_hash_indirect |
| 2336 | && dir->dynamic_adjusted) |
| 2337 | { |
| 2338 | /* If called to transfer flags for a weakdef during processing |
| 2339 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. |
| 2340 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ |
| 2341 | dir->ref_dynamic |= ind->ref_dynamic; |
| 2342 | dir->ref_regular |= ind->ref_regular; |
| 2343 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; |
| 2344 | dir->needs_plt |= ind->needs_plt; |
| 2345 | } |
| 2346 | else |
| 2347 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); |
| 2348 | } |
| 2349 | |
| 2350 | /* Return 1 if target is one of ours. */ |
| 2351 | |
| 2352 | static bfd_boolean |
| 2353 | is_ppc_elf_target (const struct bfd_target *targ) |
| 2354 | { |
| 2355 | extern const bfd_target bfd_elf32_powerpc_vec; |
| 2356 | extern const bfd_target bfd_elf32_powerpcle_vec; |
| 2357 | |
| 2358 | return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec; |
| 2359 | } |
| 2360 | |
| 2361 | /* Hook called by the linker routine which adds symbols from an object |
| 2362 | file. We use it to put .comm items in .sbss, and not .bss. */ |
| 2363 | |
| 2364 | static bfd_boolean |
| 2365 | ppc_elf_add_symbol_hook (bfd *abfd, |
| 2366 | struct bfd_link_info *info, |
| 2367 | Elf_Internal_Sym *sym, |
| 2368 | const char **namep ATTRIBUTE_UNUSED, |
| 2369 | flagword *flagsp ATTRIBUTE_UNUSED, |
| 2370 | asection **secp, |
| 2371 | bfd_vma *valp) |
| 2372 | { |
| 2373 | if (sym->st_shndx == SHN_COMMON |
| 2374 | && !info->relocatable |
| 2375 | && sym->st_size <= elf_gp_size (abfd) |
| 2376 | && is_ppc_elf_target (info->hash->creator)) |
| 2377 | { |
| 2378 | /* Common symbols less than or equal to -G nn bytes are automatically |
| 2379 | put into .sbss. */ |
| 2380 | struct ppc_elf_link_hash_table *htab; |
| 2381 | |
| 2382 | htab = ppc_elf_hash_table (info); |
| 2383 | if (htab->sbss == NULL) |
| 2384 | { |
| 2385 | flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED; |
| 2386 | |
| 2387 | if (!htab->elf.dynobj) |
| 2388 | htab->elf.dynobj = abfd; |
| 2389 | |
| 2390 | htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj, |
| 2391 | ".sbss", |
| 2392 | flags); |
| 2393 | if (htab->sbss == NULL) |
| 2394 | return FALSE; |
| 2395 | } |
| 2396 | |
| 2397 | *secp = htab->sbss; |
| 2398 | *valp = sym->st_size; |
| 2399 | } |
| 2400 | |
| 2401 | return TRUE; |
| 2402 | } |
| 2403 | \f |
| 2404 | /* Create a special linker section. */ |
| 2405 | |
| 2406 | static bfd_boolean |
| 2407 | ppc_elf_create_linker_section (bfd *abfd, |
| 2408 | struct bfd_link_info *info, |
| 2409 | flagword flags, |
| 2410 | elf_linker_section_t *lsect) |
| 2411 | { |
| 2412 | struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info); |
| 2413 | asection *s; |
| 2414 | |
| 2415 | flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 2416 | | SEC_LINKER_CREATED); |
| 2417 | |
| 2418 | /* Record the first bfd that needs the special sections. */ |
| 2419 | if (!htab->elf.dynobj) |
| 2420 | htab->elf.dynobj = abfd; |
| 2421 | |
| 2422 | s = bfd_make_section_anyway_with_flags (htab->elf.dynobj, |
| 2423 | lsect->name, |
| 2424 | flags); |
| 2425 | if (s == NULL |
| 2426 | || !bfd_set_section_alignment (htab->elf.dynobj, s, 2)) |
| 2427 | return FALSE; |
| 2428 | lsect->section = s; |
| 2429 | |
| 2430 | return TRUE; |
| 2431 | } |
| 2432 | |
| 2433 | /* Find a linker generated pointer with a given addend and type. */ |
| 2434 | |
| 2435 | static elf_linker_section_pointers_t * |
| 2436 | elf_find_pointer_linker_section |
| 2437 | (elf_linker_section_pointers_t *linker_pointers, |
| 2438 | bfd_vma addend, |
| 2439 | elf_linker_section_t *lsect) |
| 2440 | { |
| 2441 | for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next) |
| 2442 | if (lsect == linker_pointers->lsect && addend == linker_pointers->addend) |
| 2443 | return linker_pointers; |
| 2444 | |
| 2445 | return NULL; |
| 2446 | } |
| 2447 | |
| 2448 | /* Allocate a pointer to live in a linker created section. */ |
| 2449 | |
| 2450 | static bfd_boolean |
| 2451 | elf_create_pointer_linker_section (bfd *abfd, |
| 2452 | elf_linker_section_t *lsect, |
| 2453 | struct elf_link_hash_entry *h, |
| 2454 | const Elf_Internal_Rela *rel) |
| 2455 | { |
| 2456 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; |
| 2457 | elf_linker_section_pointers_t *linker_section_ptr; |
| 2458 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); |
| 2459 | bfd_size_type amt; |
| 2460 | |
| 2461 | BFD_ASSERT (lsect != NULL); |
| 2462 | |
| 2463 | /* Is this a global symbol? */ |
| 2464 | if (h != NULL) |
| 2465 | { |
| 2466 | struct ppc_elf_link_hash_entry *eh; |
| 2467 | |
| 2468 | /* Has this symbol already been allocated? If so, our work is done. */ |
| 2469 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 2470 | if (elf_find_pointer_linker_section (eh->linker_section_pointer, |
| 2471 | rel->r_addend, |
| 2472 | lsect)) |
| 2473 | return TRUE; |
| 2474 | |
| 2475 | ptr_linker_section_ptr = &eh->linker_section_pointer; |
| 2476 | } |
| 2477 | else |
| 2478 | { |
| 2479 | /* Allocation of a pointer to a local symbol. */ |
| 2480 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); |
| 2481 | |
| 2482 | /* Allocate a table to hold the local symbols if first time. */ |
| 2483 | if (!ptr) |
| 2484 | { |
| 2485 | unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; |
| 2486 | |
| 2487 | amt = num_symbols; |
| 2488 | amt *= sizeof (elf_linker_section_pointers_t *); |
| 2489 | ptr = bfd_zalloc (abfd, amt); |
| 2490 | |
| 2491 | if (!ptr) |
| 2492 | return FALSE; |
| 2493 | |
| 2494 | elf_local_ptr_offsets (abfd) = ptr; |
| 2495 | } |
| 2496 | |
| 2497 | /* Has this symbol already been allocated? If so, our work is done. */ |
| 2498 | if (elf_find_pointer_linker_section (ptr[r_symndx], |
| 2499 | rel->r_addend, |
| 2500 | lsect)) |
| 2501 | return TRUE; |
| 2502 | |
| 2503 | ptr_linker_section_ptr = &ptr[r_symndx]; |
| 2504 | } |
| 2505 | |
| 2506 | /* Allocate space for a pointer in the linker section, and allocate |
| 2507 | a new pointer record from internal memory. */ |
| 2508 | BFD_ASSERT (ptr_linker_section_ptr != NULL); |
| 2509 | amt = sizeof (elf_linker_section_pointers_t); |
| 2510 | linker_section_ptr = bfd_alloc (abfd, amt); |
| 2511 | |
| 2512 | if (!linker_section_ptr) |
| 2513 | return FALSE; |
| 2514 | |
| 2515 | linker_section_ptr->next = *ptr_linker_section_ptr; |
| 2516 | linker_section_ptr->addend = rel->r_addend; |
| 2517 | linker_section_ptr->lsect = lsect; |
| 2518 | *ptr_linker_section_ptr = linker_section_ptr; |
| 2519 | |
| 2520 | linker_section_ptr->offset = lsect->section->size; |
| 2521 | lsect->section->size += 4; |
| 2522 | |
| 2523 | #ifdef DEBUG |
| 2524 | fprintf (stderr, |
| 2525 | "Create pointer in linker section %s, offset = %ld, section size = %ld\n", |
| 2526 | lsect->name, (long) linker_section_ptr->offset, |
| 2527 | (long) lsect->section->size); |
| 2528 | #endif |
| 2529 | |
| 2530 | return TRUE; |
| 2531 | } |
| 2532 | |
| 2533 | static bfd_boolean |
| 2534 | update_local_sym_info (bfd *abfd, |
| 2535 | Elf_Internal_Shdr *symtab_hdr, |
| 2536 | unsigned long r_symndx, |
| 2537 | int tls_type) |
| 2538 | { |
| 2539 | bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd); |
| 2540 | char *local_got_tls_masks; |
| 2541 | |
| 2542 | if (local_got_refcounts == NULL) |
| 2543 | { |
| 2544 | bfd_size_type size = symtab_hdr->sh_info; |
| 2545 | |
| 2546 | size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks); |
| 2547 | local_got_refcounts = bfd_zalloc (abfd, size); |
| 2548 | if (local_got_refcounts == NULL) |
| 2549 | return FALSE; |
| 2550 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 2551 | } |
| 2552 | |
| 2553 | local_got_refcounts[r_symndx] += 1; |
| 2554 | local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info); |
| 2555 | local_got_tls_masks[r_symndx] |= tls_type; |
| 2556 | return TRUE; |
| 2557 | } |
| 2558 | |
| 2559 | static void |
| 2560 | bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type) |
| 2561 | { |
| 2562 | (*_bfd_error_handler) |
| 2563 | (_("%B: relocation %s cannot be used when making a shared object"), |
| 2564 | abfd, |
| 2565 | ppc_elf_howto_table[r_type]->name); |
| 2566 | bfd_set_error (bfd_error_bad_value); |
| 2567 | } |
| 2568 | |
| 2569 | /* Look through the relocs for a section during the first phase, and |
| 2570 | allocate space in the global offset table or procedure linkage |
| 2571 | table. */ |
| 2572 | |
| 2573 | static bfd_boolean |
| 2574 | ppc_elf_check_relocs (bfd *abfd, |
| 2575 | struct bfd_link_info *info, |
| 2576 | asection *sec, |
| 2577 | const Elf_Internal_Rela *relocs) |
| 2578 | { |
| 2579 | struct ppc_elf_link_hash_table *htab; |
| 2580 | Elf_Internal_Shdr *symtab_hdr; |
| 2581 | struct elf_link_hash_entry **sym_hashes; |
| 2582 | const Elf_Internal_Rela *rel; |
| 2583 | const Elf_Internal_Rela *rel_end; |
| 2584 | asection *sreloc; |
| 2585 | |
| 2586 | if (info->relocatable) |
| 2587 | return TRUE; |
| 2588 | |
| 2589 | /* Don't do anything special with non-loaded, non-alloced sections. |
| 2590 | In particular, any relocs in such sections should not affect GOT |
| 2591 | and PLT reference counting (ie. we don't allow them to create GOT |
| 2592 | or PLT entries), there's no possibility or desire to optimize TLS |
| 2593 | relocs, and there's not much point in propagating relocs to shared |
| 2594 | libs that the dynamic linker won't relocate. */ |
| 2595 | if ((sec->flags & SEC_ALLOC) == 0) |
| 2596 | return TRUE; |
| 2597 | |
| 2598 | #ifdef DEBUG |
| 2599 | _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B", |
| 2600 | sec, abfd); |
| 2601 | #endif |
| 2602 | |
| 2603 | /* Initialize howto table if not already done. */ |
| 2604 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 2605 | ppc_elf_howto_init (); |
| 2606 | |
| 2607 | htab = ppc_elf_hash_table (info); |
| 2608 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2609 | sym_hashes = elf_sym_hashes (abfd); |
| 2610 | sreloc = NULL; |
| 2611 | |
| 2612 | rel_end = relocs + sec->reloc_count; |
| 2613 | for (rel = relocs; rel < rel_end; rel++) |
| 2614 | { |
| 2615 | unsigned long r_symndx; |
| 2616 | enum elf_ppc_reloc_type r_type; |
| 2617 | struct elf_link_hash_entry *h; |
| 2618 | int tls_type = 0; |
| 2619 | |
| 2620 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2621 | if (r_symndx < symtab_hdr->sh_info) |
| 2622 | h = NULL; |
| 2623 | else |
| 2624 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2625 | |
| 2626 | /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got. |
| 2627 | This shows up in particular in an R_PPC_ADDR32 in the eabi |
| 2628 | startup code. */ |
| 2629 | if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2630 | { |
| 2631 | if (htab->got == NULL) |
| 2632 | { |
| 2633 | if (htab->elf.dynobj == NULL) |
| 2634 | htab->elf.dynobj = abfd; |
| 2635 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) |
| 2636 | return FALSE; |
| 2637 | } |
| 2638 | } |
| 2639 | |
| 2640 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2641 | switch (r_type) |
| 2642 | { |
| 2643 | case R_PPC_GOT_TLSLD16: |
| 2644 | case R_PPC_GOT_TLSLD16_LO: |
| 2645 | case R_PPC_GOT_TLSLD16_HI: |
| 2646 | case R_PPC_GOT_TLSLD16_HA: |
| 2647 | htab->tlsld_got.refcount += 1; |
| 2648 | tls_type = TLS_TLS | TLS_LD; |
| 2649 | goto dogottls; |
| 2650 | |
| 2651 | case R_PPC_GOT_TLSGD16: |
| 2652 | case R_PPC_GOT_TLSGD16_LO: |
| 2653 | case R_PPC_GOT_TLSGD16_HI: |
| 2654 | case R_PPC_GOT_TLSGD16_HA: |
| 2655 | tls_type = TLS_TLS | TLS_GD; |
| 2656 | goto dogottls; |
| 2657 | |
| 2658 | case R_PPC_GOT_TPREL16: |
| 2659 | case R_PPC_GOT_TPREL16_LO: |
| 2660 | case R_PPC_GOT_TPREL16_HI: |
| 2661 | case R_PPC_GOT_TPREL16_HA: |
| 2662 | if (info->shared) |
| 2663 | info->flags |= DF_STATIC_TLS; |
| 2664 | tls_type = TLS_TLS | TLS_TPREL; |
| 2665 | goto dogottls; |
| 2666 | |
| 2667 | case R_PPC_GOT_DTPREL16: |
| 2668 | case R_PPC_GOT_DTPREL16_LO: |
| 2669 | case R_PPC_GOT_DTPREL16_HI: |
| 2670 | case R_PPC_GOT_DTPREL16_HA: |
| 2671 | tls_type = TLS_TLS | TLS_DTPREL; |
| 2672 | dogottls: |
| 2673 | sec->has_tls_reloc = 1; |
| 2674 | /* Fall thru */ |
| 2675 | |
| 2676 | /* GOT16 relocations */ |
| 2677 | case R_PPC_GOT16: |
| 2678 | case R_PPC_GOT16_LO: |
| 2679 | case R_PPC_GOT16_HI: |
| 2680 | case R_PPC_GOT16_HA: |
| 2681 | /* This symbol requires a global offset table entry. */ |
| 2682 | if (htab->got == NULL) |
| 2683 | { |
| 2684 | if (htab->elf.dynobj == NULL) |
| 2685 | htab->elf.dynobj = abfd; |
| 2686 | if (!ppc_elf_create_got (htab->elf.dynobj, info)) |
| 2687 | return FALSE; |
| 2688 | } |
| 2689 | if (h != NULL) |
| 2690 | { |
| 2691 | h->got.refcount += 1; |
| 2692 | ppc_elf_hash_entry (h)->tls_mask |= tls_type; |
| 2693 | } |
| 2694 | else |
| 2695 | /* This is a global offset table entry for a local symbol. */ |
| 2696 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type)) |
| 2697 | return FALSE; |
| 2698 | break; |
| 2699 | |
| 2700 | /* Indirect .sdata relocation. */ |
| 2701 | case R_PPC_EMB_SDAI16: |
| 2702 | if (info->shared) |
| 2703 | { |
| 2704 | bad_shared_reloc (abfd, r_type); |
| 2705 | return FALSE; |
| 2706 | } |
| 2707 | if (htab->sdata[0].section == NULL |
| 2708 | && !ppc_elf_create_linker_section (abfd, info, 0, |
| 2709 | &htab->sdata[0])) |
| 2710 | return FALSE; |
| 2711 | if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0], |
| 2712 | h, rel)) |
| 2713 | return FALSE; |
| 2714 | break; |
| 2715 | |
| 2716 | /* Indirect .sdata2 relocation. */ |
| 2717 | case R_PPC_EMB_SDA2I16: |
| 2718 | if (info->shared) |
| 2719 | { |
| 2720 | bad_shared_reloc (abfd, r_type); |
| 2721 | return FALSE; |
| 2722 | } |
| 2723 | if (htab->sdata[1].section == NULL |
| 2724 | && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY, |
| 2725 | &htab->sdata[1])) |
| 2726 | return FALSE; |
| 2727 | if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1], |
| 2728 | h, rel)) |
| 2729 | return FALSE; |
| 2730 | break; |
| 2731 | |
| 2732 | case R_PPC_SDAREL16: |
| 2733 | case R_PPC_EMB_SDA2REL: |
| 2734 | case R_PPC_EMB_SDA21: |
| 2735 | case R_PPC_EMB_RELSDA: |
| 2736 | case R_PPC_EMB_NADDR32: |
| 2737 | case R_PPC_EMB_NADDR16: |
| 2738 | case R_PPC_EMB_NADDR16_LO: |
| 2739 | case R_PPC_EMB_NADDR16_HI: |
| 2740 | case R_PPC_EMB_NADDR16_HA: |
| 2741 | if (info->shared) |
| 2742 | { |
| 2743 | bad_shared_reloc (abfd, r_type); |
| 2744 | return FALSE; |
| 2745 | } |
| 2746 | break; |
| 2747 | |
| 2748 | case R_PPC_PLT32: |
| 2749 | case R_PPC_PLTREL24: |
| 2750 | case R_PPC_PLTREL32: |
| 2751 | case R_PPC_PLT16_LO: |
| 2752 | case R_PPC_PLT16_HI: |
| 2753 | case R_PPC_PLT16_HA: |
| 2754 | #ifdef DEBUG |
| 2755 | fprintf (stderr, "Reloc requires a PLT entry\n"); |
| 2756 | #endif |
| 2757 | /* This symbol requires a procedure linkage table entry. We |
| 2758 | actually build the entry in finish_dynamic_symbol, |
| 2759 | because this might be a case of linking PIC code without |
| 2760 | linking in any dynamic objects, in which case we don't |
| 2761 | need to generate a procedure linkage table after all. */ |
| 2762 | |
| 2763 | if (h == NULL) |
| 2764 | { |
| 2765 | /* It does not make sense to have a procedure linkage |
| 2766 | table entry for a local symbol. */ |
| 2767 | (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against " |
| 2768 | "local symbol"), |
| 2769 | abfd, |
| 2770 | sec, |
| 2771 | (long) rel->r_offset, |
| 2772 | ppc_elf_howto_table[r_type]->name); |
| 2773 | bfd_set_error (bfd_error_bad_value); |
| 2774 | return FALSE; |
| 2775 | } |
| 2776 | |
| 2777 | h->needs_plt = 1; |
| 2778 | h->plt.refcount++; |
| 2779 | break; |
| 2780 | |
| 2781 | /* The following relocations don't need to propagate the |
| 2782 | relocation if linking a shared object since they are |
| 2783 | section relative. */ |
| 2784 | case R_PPC_SECTOFF: |
| 2785 | case R_PPC_SECTOFF_LO: |
| 2786 | case R_PPC_SECTOFF_HI: |
| 2787 | case R_PPC_SECTOFF_HA: |
| 2788 | case R_PPC_DTPREL16: |
| 2789 | case R_PPC_DTPREL16_LO: |
| 2790 | case R_PPC_DTPREL16_HI: |
| 2791 | case R_PPC_DTPREL16_HA: |
| 2792 | case R_PPC_TOC16: |
| 2793 | break; |
| 2794 | |
| 2795 | /* This are just markers. */ |
| 2796 | case R_PPC_TLS: |
| 2797 | case R_PPC_EMB_MRKREF: |
| 2798 | case R_PPC_NONE: |
| 2799 | case R_PPC_max: |
| 2800 | break; |
| 2801 | |
| 2802 | /* These should only appear in dynamic objects. */ |
| 2803 | case R_PPC_COPY: |
| 2804 | case R_PPC_GLOB_DAT: |
| 2805 | case R_PPC_JMP_SLOT: |
| 2806 | case R_PPC_RELATIVE: |
| 2807 | break; |
| 2808 | |
| 2809 | /* These aren't handled yet. We'll report an error later. */ |
| 2810 | case R_PPC_ADDR30: |
| 2811 | case R_PPC_EMB_RELSEC16: |
| 2812 | case R_PPC_EMB_RELST_LO: |
| 2813 | case R_PPC_EMB_RELST_HI: |
| 2814 | case R_PPC_EMB_RELST_HA: |
| 2815 | case R_PPC_EMB_BIT_FLD: |
| 2816 | break; |
| 2817 | |
| 2818 | /* This refers only to functions defined in the shared library. */ |
| 2819 | case R_PPC_LOCAL24PC: |
| 2820 | break; |
| 2821 | |
| 2822 | /* This relocation describes the C++ object vtable hierarchy. |
| 2823 | Reconstruct it for later use during GC. */ |
| 2824 | case R_PPC_GNU_VTINHERIT: |
| 2825 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 2826 | return FALSE; |
| 2827 | break; |
| 2828 | |
| 2829 | /* This relocation describes which C++ vtable entries are actually |
| 2830 | used. Record for later use during GC. */ |
| 2831 | case R_PPC_GNU_VTENTRY: |
| 2832 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 2833 | return FALSE; |
| 2834 | break; |
| 2835 | |
| 2836 | /* We shouldn't really be seeing these. */ |
| 2837 | case R_PPC_TPREL32: |
| 2838 | if (info->shared) |
| 2839 | info->flags |= DF_STATIC_TLS; |
| 2840 | goto dodyn; |
| 2841 | |
| 2842 | /* Nor these. */ |
| 2843 | case R_PPC_DTPMOD32: |
| 2844 | case R_PPC_DTPREL32: |
| 2845 | goto dodyn; |
| 2846 | |
| 2847 | case R_PPC_TPREL16: |
| 2848 | case R_PPC_TPREL16_LO: |
| 2849 | case R_PPC_TPREL16_HI: |
| 2850 | case R_PPC_TPREL16_HA: |
| 2851 | if (info->shared) |
| 2852 | info->flags |= DF_STATIC_TLS; |
| 2853 | goto dodyn; |
| 2854 | |
| 2855 | /* When creating a shared object, we must copy these |
| 2856 | relocs into the output file. We create a reloc |
| 2857 | section in dynobj and make room for the reloc. */ |
| 2858 | case R_PPC_REL24: |
| 2859 | case R_PPC_REL14: |
| 2860 | case R_PPC_REL14_BRTAKEN: |
| 2861 | case R_PPC_REL14_BRNTAKEN: |
| 2862 | case R_PPC_REL32: |
| 2863 | if (h == NULL |
| 2864 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2865 | break; |
| 2866 | /* fall through */ |
| 2867 | |
| 2868 | case R_PPC_ADDR32: |
| 2869 | case R_PPC_ADDR24: |
| 2870 | case R_PPC_ADDR16: |
| 2871 | case R_PPC_ADDR16_LO: |
| 2872 | case R_PPC_ADDR16_HI: |
| 2873 | case R_PPC_ADDR16_HA: |
| 2874 | case R_PPC_ADDR14: |
| 2875 | case R_PPC_ADDR14_BRTAKEN: |
| 2876 | case R_PPC_ADDR14_BRNTAKEN: |
| 2877 | case R_PPC_UADDR32: |
| 2878 | case R_PPC_UADDR16: |
| 2879 | if (h != NULL && !info->shared) |
| 2880 | { |
| 2881 | /* We may need a plt entry if the symbol turns out to be |
| 2882 | a function defined in a dynamic object. */ |
| 2883 | h->plt.refcount++; |
| 2884 | |
| 2885 | /* We may need a copy reloc too. */ |
| 2886 | h->non_got_ref = 1; |
| 2887 | } |
| 2888 | |
| 2889 | dodyn: |
| 2890 | /* If we are creating a shared library, and this is a reloc |
| 2891 | against a global symbol, or a non PC relative reloc |
| 2892 | against a local symbol, then we need to copy the reloc |
| 2893 | into the shared library. However, if we are linking with |
| 2894 | -Bsymbolic, we do not need to copy a reloc against a |
| 2895 | global symbol which is defined in an object we are |
| 2896 | including in the link (i.e., DEF_REGULAR is set). At |
| 2897 | this point we have not seen all the input files, so it is |
| 2898 | possible that DEF_REGULAR is not set now but will be set |
| 2899 | later (it is never cleared). In case of a weak definition, |
| 2900 | DEF_REGULAR may be cleared later by a strong definition in |
| 2901 | a shared library. We account for that possibility below by |
| 2902 | storing information in the dyn_relocs field of the hash |
| 2903 | table entry. A similar situation occurs when creating |
| 2904 | shared libraries and symbol visibility changes render the |
| 2905 | symbol local. |
| 2906 | |
| 2907 | If on the other hand, we are creating an executable, we |
| 2908 | may need to keep relocations for symbols satisfied by a |
| 2909 | dynamic library if we manage to avoid copy relocs for the |
| 2910 | symbol. */ |
| 2911 | if ((info->shared |
| 2912 | && (MUST_BE_DYN_RELOC (r_type) |
| 2913 | || (h != NULL |
| 2914 | && (! info->symbolic |
| 2915 | || h->root.type == bfd_link_hash_defweak |
| 2916 | || !h->def_regular)))) |
| 2917 | || (ELIMINATE_COPY_RELOCS |
| 2918 | && !info->shared |
| 2919 | && h != NULL |
| 2920 | && (h->root.type == bfd_link_hash_defweak |
| 2921 | || !h->def_regular))) |
| 2922 | { |
| 2923 | struct ppc_elf_dyn_relocs *p; |
| 2924 | struct ppc_elf_dyn_relocs **head; |
| 2925 | |
| 2926 | #ifdef DEBUG |
| 2927 | fprintf (stderr, |
| 2928 | "ppc_elf_check_relocs needs to " |
| 2929 | "create relocation for %s\n", |
| 2930 | (h && h->root.root.string |
| 2931 | ? h->root.root.string : "<unknown>")); |
| 2932 | #endif |
| 2933 | if (sreloc == NULL) |
| 2934 | { |
| 2935 | const char *name; |
| 2936 | |
| 2937 | name = (bfd_elf_string_from_elf_section |
| 2938 | (abfd, |
| 2939 | elf_elfheader (abfd)->e_shstrndx, |
| 2940 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 2941 | if (name == NULL) |
| 2942 | return FALSE; |
| 2943 | |
| 2944 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 2945 | && strcmp (bfd_get_section_name (abfd, sec), |
| 2946 | name + 5) == 0); |
| 2947 | |
| 2948 | if (htab->elf.dynobj == NULL) |
| 2949 | htab->elf.dynobj = abfd; |
| 2950 | sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); |
| 2951 | if (sreloc == NULL) |
| 2952 | { |
| 2953 | flagword flags; |
| 2954 | |
| 2955 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 2956 | | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| 2957 | | SEC_ALLOC | SEC_LOAD); |
| 2958 | sreloc = bfd_make_section_with_flags (htab->elf.dynobj, |
| 2959 | name, |
| 2960 | flags); |
| 2961 | if (sreloc == NULL |
| 2962 | || ! bfd_set_section_alignment (htab->elf.dynobj, |
| 2963 | sreloc, 2)) |
| 2964 | return FALSE; |
| 2965 | } |
| 2966 | elf_section_data (sec)->sreloc = sreloc; |
| 2967 | } |
| 2968 | |
| 2969 | /* If this is a global symbol, we count the number of |
| 2970 | relocations we need for this symbol. */ |
| 2971 | if (h != NULL) |
| 2972 | { |
| 2973 | head = &ppc_elf_hash_entry (h)->dyn_relocs; |
| 2974 | } |
| 2975 | else |
| 2976 | { |
| 2977 | /* Track dynamic relocs needed for local syms too. |
| 2978 | We really need local syms available to do this |
| 2979 | easily. Oh well. */ |
| 2980 | |
| 2981 | asection *s; |
| 2982 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| 2983 | sec, r_symndx); |
| 2984 | if (s == NULL) |
| 2985 | return FALSE; |
| 2986 | |
| 2987 | head = ((struct ppc_elf_dyn_relocs **) |
| 2988 | &elf_section_data (s)->local_dynrel); |
| 2989 | } |
| 2990 | |
| 2991 | p = *head; |
| 2992 | if (p == NULL || p->sec != sec) |
| 2993 | { |
| 2994 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
| 2995 | if (p == NULL) |
| 2996 | return FALSE; |
| 2997 | p->next = *head; |
| 2998 | *head = p; |
| 2999 | p->sec = sec; |
| 3000 | p->count = 0; |
| 3001 | p->pc_count = 0; |
| 3002 | } |
| 3003 | |
| 3004 | p->count += 1; |
| 3005 | if (!MUST_BE_DYN_RELOC (r_type)) |
| 3006 | p->pc_count += 1; |
| 3007 | } |
| 3008 | |
| 3009 | break; |
| 3010 | } |
| 3011 | } |
| 3012 | |
| 3013 | return TRUE; |
| 3014 | } |
| 3015 | \f |
| 3016 | /* Merge backend specific data from an object file to the output |
| 3017 | object file when linking. */ |
| 3018 | |
| 3019 | static bfd_boolean |
| 3020 | ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 3021 | { |
| 3022 | flagword old_flags; |
| 3023 | flagword new_flags; |
| 3024 | bfd_boolean error; |
| 3025 | |
| 3026 | if (!is_ppc_elf_target (ibfd->xvec) |
| 3027 | || !is_ppc_elf_target (obfd->xvec)) |
| 3028 | return TRUE; |
| 3029 | |
| 3030 | /* Check if we have the same endianess. */ |
| 3031 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
| 3032 | return FALSE; |
| 3033 | |
| 3034 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 3035 | old_flags = elf_elfheader (obfd)->e_flags; |
| 3036 | if (!elf_flags_init (obfd)) |
| 3037 | { |
| 3038 | /* First call, no flags set. */ |
| 3039 | elf_flags_init (obfd) = TRUE; |
| 3040 | elf_elfheader (obfd)->e_flags = new_flags; |
| 3041 | } |
| 3042 | |
| 3043 | /* Compatible flags are ok. */ |
| 3044 | else if (new_flags == old_flags) |
| 3045 | ; |
| 3046 | |
| 3047 | /* Incompatible flags. */ |
| 3048 | else |
| 3049 | { |
| 3050 | /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib |
| 3051 | to be linked with either. */ |
| 3052 | error = FALSE; |
| 3053 | if ((new_flags & EF_PPC_RELOCATABLE) != 0 |
| 3054 | && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0) |
| 3055 | { |
| 3056 | error = TRUE; |
| 3057 | (*_bfd_error_handler) |
| 3058 | (_("%B: compiled with -mrelocatable and linked with " |
| 3059 | "modules compiled normally"), ibfd); |
| 3060 | } |
| 3061 | else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0 |
| 3062 | && (old_flags & EF_PPC_RELOCATABLE) != 0) |
| 3063 | { |
| 3064 | error = TRUE; |
| 3065 | (*_bfd_error_handler) |
| 3066 | (_("%B: compiled normally and linked with " |
| 3067 | "modules compiled with -mrelocatable"), ibfd); |
| 3068 | } |
| 3069 | |
| 3070 | /* The output is -mrelocatable-lib iff both the input files are. */ |
| 3071 | if (! (new_flags & EF_PPC_RELOCATABLE_LIB)) |
| 3072 | elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB; |
| 3073 | |
| 3074 | /* The output is -mrelocatable iff it can't be -mrelocatable-lib, |
| 3075 | but each input file is either -mrelocatable or -mrelocatable-lib. */ |
| 3076 | if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB) |
| 3077 | && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)) |
| 3078 | && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))) |
| 3079 | elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE; |
| 3080 | |
| 3081 | /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if |
| 3082 | any module uses it. */ |
| 3083 | elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB); |
| 3084 | |
| 3085 | new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 3086 | old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB); |
| 3087 | |
| 3088 | /* Warn about any other mismatches. */ |
| 3089 | if (new_flags != old_flags) |
| 3090 | { |
| 3091 | error = TRUE; |
| 3092 | (*_bfd_error_handler) |
| 3093 | (_("%B: uses different e_flags (0x%lx) fields " |
| 3094 | "than previous modules (0x%lx)"), |
| 3095 | ibfd, (long) new_flags, (long) old_flags); |
| 3096 | } |
| 3097 | |
| 3098 | if (error) |
| 3099 | { |
| 3100 | bfd_set_error (bfd_error_bad_value); |
| 3101 | return FALSE; |
| 3102 | } |
| 3103 | } |
| 3104 | |
| 3105 | return TRUE; |
| 3106 | } |
| 3107 | \f |
| 3108 | /* Return the section that should be marked against GC for a given |
| 3109 | relocation. */ |
| 3110 | |
| 3111 | static asection * |
| 3112 | ppc_elf_gc_mark_hook (asection *sec, |
| 3113 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 3114 | Elf_Internal_Rela *rel, |
| 3115 | struct elf_link_hash_entry *h, |
| 3116 | Elf_Internal_Sym *sym) |
| 3117 | { |
| 3118 | if (h != NULL) |
| 3119 | { |
| 3120 | switch (ELF32_R_TYPE (rel->r_info)) |
| 3121 | { |
| 3122 | case R_PPC_GNU_VTINHERIT: |
| 3123 | case R_PPC_GNU_VTENTRY: |
| 3124 | break; |
| 3125 | |
| 3126 | default: |
| 3127 | switch (h->root.type) |
| 3128 | { |
| 3129 | case bfd_link_hash_defined: |
| 3130 | case bfd_link_hash_defweak: |
| 3131 | return h->root.u.def.section; |
| 3132 | |
| 3133 | case bfd_link_hash_common: |
| 3134 | return h->root.u.c.p->section; |
| 3135 | |
| 3136 | default: |
| 3137 | break; |
| 3138 | } |
| 3139 | } |
| 3140 | } |
| 3141 | else |
| 3142 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 3143 | |
| 3144 | return NULL; |
| 3145 | } |
| 3146 | |
| 3147 | /* Update the got, plt and dynamic reloc reference counts for the |
| 3148 | section being removed. */ |
| 3149 | |
| 3150 | static bfd_boolean |
| 3151 | ppc_elf_gc_sweep_hook (bfd *abfd, |
| 3152 | struct bfd_link_info *info, |
| 3153 | asection *sec, |
| 3154 | const Elf_Internal_Rela *relocs) |
| 3155 | { |
| 3156 | struct ppc_elf_link_hash_table *htab; |
| 3157 | Elf_Internal_Shdr *symtab_hdr; |
| 3158 | struct elf_link_hash_entry **sym_hashes; |
| 3159 | bfd_signed_vma *local_got_refcounts; |
| 3160 | const Elf_Internal_Rela *rel, *relend; |
| 3161 | |
| 3162 | if ((sec->flags & SEC_ALLOC) == 0) |
| 3163 | return TRUE; |
| 3164 | |
| 3165 | elf_section_data (sec)->local_dynrel = NULL; |
| 3166 | |
| 3167 | htab = ppc_elf_hash_table (info); |
| 3168 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3169 | sym_hashes = elf_sym_hashes (abfd); |
| 3170 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 3171 | |
| 3172 | relend = relocs + sec->reloc_count; |
| 3173 | for (rel = relocs; rel < relend; rel++) |
| 3174 | { |
| 3175 | unsigned long r_symndx; |
| 3176 | enum elf_ppc_reloc_type r_type; |
| 3177 | struct elf_link_hash_entry *h = NULL; |
| 3178 | |
| 3179 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3180 | if (r_symndx >= symtab_hdr->sh_info) |
| 3181 | { |
| 3182 | struct ppc_elf_dyn_relocs **pp, *p; |
| 3183 | struct ppc_elf_link_hash_entry *eh; |
| 3184 | |
| 3185 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3186 | while (h->root.type == bfd_link_hash_indirect |
| 3187 | || h->root.type == bfd_link_hash_warning) |
| 3188 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3189 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 3190 | |
| 3191 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| 3192 | if (p->sec == sec) |
| 3193 | { |
| 3194 | /* Everything must go for SEC. */ |
| 3195 | *pp = p->next; |
| 3196 | break; |
| 3197 | } |
| 3198 | } |
| 3199 | |
| 3200 | r_type = ELF32_R_TYPE (rel->r_info); |
| 3201 | switch (r_type) |
| 3202 | { |
| 3203 | case R_PPC_GOT_TLSLD16: |
| 3204 | case R_PPC_GOT_TLSLD16_LO: |
| 3205 | case R_PPC_GOT_TLSLD16_HI: |
| 3206 | case R_PPC_GOT_TLSLD16_HA: |
| 3207 | htab->tlsld_got.refcount -= 1; |
| 3208 | /* Fall thru */ |
| 3209 | |
| 3210 | case R_PPC_GOT_TLSGD16: |
| 3211 | case R_PPC_GOT_TLSGD16_LO: |
| 3212 | case R_PPC_GOT_TLSGD16_HI: |
| 3213 | case R_PPC_GOT_TLSGD16_HA: |
| 3214 | case R_PPC_GOT_TPREL16: |
| 3215 | case R_PPC_GOT_TPREL16_LO: |
| 3216 | case R_PPC_GOT_TPREL16_HI: |
| 3217 | case R_PPC_GOT_TPREL16_HA: |
| 3218 | case R_PPC_GOT_DTPREL16: |
| 3219 | case R_PPC_GOT_DTPREL16_LO: |
| 3220 | case R_PPC_GOT_DTPREL16_HI: |
| 3221 | case R_PPC_GOT_DTPREL16_HA: |
| 3222 | case R_PPC_GOT16: |
| 3223 | case R_PPC_GOT16_LO: |
| 3224 | case R_PPC_GOT16_HI: |
| 3225 | case R_PPC_GOT16_HA: |
| 3226 | if (h != NULL) |
| 3227 | { |
| 3228 | if (h->got.refcount > 0) |
| 3229 | h->got.refcount--; |
| 3230 | } |
| 3231 | else if (local_got_refcounts != NULL) |
| 3232 | { |
| 3233 | if (local_got_refcounts[r_symndx] > 0) |
| 3234 | local_got_refcounts[r_symndx]--; |
| 3235 | } |
| 3236 | break; |
| 3237 | |
| 3238 | case R_PPC_REL24: |
| 3239 | case R_PPC_REL14: |
| 3240 | case R_PPC_REL14_BRTAKEN: |
| 3241 | case R_PPC_REL14_BRNTAKEN: |
| 3242 | case R_PPC_REL32: |
| 3243 | if (h == NULL |
| 3244 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 3245 | break; |
| 3246 | /* Fall thru */ |
| 3247 | |
| 3248 | case R_PPC_ADDR32: |
| 3249 | case R_PPC_ADDR24: |
| 3250 | case R_PPC_ADDR16: |
| 3251 | case R_PPC_ADDR16_LO: |
| 3252 | case R_PPC_ADDR16_HI: |
| 3253 | case R_PPC_ADDR16_HA: |
| 3254 | case R_PPC_ADDR14: |
| 3255 | case R_PPC_ADDR14_BRTAKEN: |
| 3256 | case R_PPC_ADDR14_BRNTAKEN: |
| 3257 | case R_PPC_UADDR32: |
| 3258 | case R_PPC_UADDR16: |
| 3259 | case R_PPC_PLT32: |
| 3260 | case R_PPC_PLTREL24: |
| 3261 | case R_PPC_PLT16_LO: |
| 3262 | case R_PPC_PLT16_HI: |
| 3263 | case R_PPC_PLT16_HA: |
| 3264 | if (h != NULL) |
| 3265 | { |
| 3266 | if (h->plt.refcount > 0) |
| 3267 | h->plt.refcount--; |
| 3268 | } |
| 3269 | break; |
| 3270 | |
| 3271 | default: |
| 3272 | break; |
| 3273 | } |
| 3274 | } |
| 3275 | return TRUE; |
| 3276 | } |
| 3277 | \f |
| 3278 | /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */ |
| 3279 | |
| 3280 | asection * |
| 3281 | ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) |
| 3282 | { |
| 3283 | struct ppc_elf_link_hash_table *htab; |
| 3284 | |
| 3285 | htab = ppc_elf_hash_table (info); |
| 3286 | htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
| 3287 | FALSE, FALSE, TRUE); |
| 3288 | |
| 3289 | return _bfd_elf_tls_setup (obfd, info); |
| 3290 | } |
| 3291 | |
| 3292 | /* Run through all the TLS relocs looking for optimization |
| 3293 | opportunities. */ |
| 3294 | |
| 3295 | bfd_boolean |
| 3296 | ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED, |
| 3297 | struct bfd_link_info *info) |
| 3298 | { |
| 3299 | bfd *ibfd; |
| 3300 | asection *sec; |
| 3301 | struct ppc_elf_link_hash_table *htab; |
| 3302 | |
| 3303 | if (info->relocatable || info->shared) |
| 3304 | return TRUE; |
| 3305 | |
| 3306 | htab = ppc_elf_hash_table (info); |
| 3307 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 3308 | { |
| 3309 | Elf_Internal_Sym *locsyms = NULL; |
| 3310 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 3311 | |
| 3312 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 3313 | if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) |
| 3314 | { |
| 3315 | Elf_Internal_Rela *relstart, *rel, *relend; |
| 3316 | int expecting_tls_get_addr; |
| 3317 | |
| 3318 | /* Read the relocations. */ |
| 3319 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
| 3320 | info->keep_memory); |
| 3321 | if (relstart == NULL) |
| 3322 | return FALSE; |
| 3323 | |
| 3324 | expecting_tls_get_addr = 0; |
| 3325 | relend = relstart + sec->reloc_count; |
| 3326 | for (rel = relstart; rel < relend; rel++) |
| 3327 | { |
| 3328 | enum elf_ppc_reloc_type r_type; |
| 3329 | unsigned long r_symndx; |
| 3330 | struct elf_link_hash_entry *h = NULL; |
| 3331 | char *tls_mask; |
| 3332 | char tls_set, tls_clear; |
| 3333 | bfd_boolean is_local; |
| 3334 | |
| 3335 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3336 | if (r_symndx >= symtab_hdr->sh_info) |
| 3337 | { |
| 3338 | struct elf_link_hash_entry **sym_hashes; |
| 3339 | |
| 3340 | sym_hashes = elf_sym_hashes (ibfd); |
| 3341 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 3342 | while (h->root.type == bfd_link_hash_indirect |
| 3343 | || h->root.type == bfd_link_hash_warning) |
| 3344 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3345 | } |
| 3346 | |
| 3347 | is_local = FALSE; |
| 3348 | if (h == NULL |
| 3349 | || !h->def_dynamic) |
| 3350 | is_local = TRUE; |
| 3351 | |
| 3352 | r_type = ELF32_R_TYPE (rel->r_info); |
| 3353 | switch (r_type) |
| 3354 | { |
| 3355 | case R_PPC_GOT_TLSLD16: |
| 3356 | case R_PPC_GOT_TLSLD16_LO: |
| 3357 | case R_PPC_GOT_TLSLD16_HI: |
| 3358 | case R_PPC_GOT_TLSLD16_HA: |
| 3359 | /* These relocs should never be against a symbol |
| 3360 | defined in a shared lib. Leave them alone if |
| 3361 | that turns out to be the case. */ |
| 3362 | expecting_tls_get_addr = 0; |
| 3363 | htab->tlsld_got.refcount -= 1; |
| 3364 | if (!is_local) |
| 3365 | continue; |
| 3366 | |
| 3367 | /* LD -> LE */ |
| 3368 | tls_set = 0; |
| 3369 | tls_clear = TLS_LD; |
| 3370 | expecting_tls_get_addr = 1; |
| 3371 | break; |
| 3372 | |
| 3373 | case R_PPC_GOT_TLSGD16: |
| 3374 | case R_PPC_GOT_TLSGD16_LO: |
| 3375 | case R_PPC_GOT_TLSGD16_HI: |
| 3376 | case R_PPC_GOT_TLSGD16_HA: |
| 3377 | if (is_local) |
| 3378 | /* GD -> LE */ |
| 3379 | tls_set = 0; |
| 3380 | else |
| 3381 | /* GD -> IE */ |
| 3382 | tls_set = TLS_TLS | TLS_TPRELGD; |
| 3383 | tls_clear = TLS_GD; |
| 3384 | expecting_tls_get_addr = 1; |
| 3385 | break; |
| 3386 | |
| 3387 | case R_PPC_GOT_TPREL16: |
| 3388 | case R_PPC_GOT_TPREL16_LO: |
| 3389 | case R_PPC_GOT_TPREL16_HI: |
| 3390 | case R_PPC_GOT_TPREL16_HA: |
| 3391 | expecting_tls_get_addr = 0; |
| 3392 | if (is_local) |
| 3393 | { |
| 3394 | /* IE -> LE */ |
| 3395 | tls_set = 0; |
| 3396 | tls_clear = TLS_TPREL; |
| 3397 | break; |
| 3398 | } |
| 3399 | else |
| 3400 | continue; |
| 3401 | |
| 3402 | case R_PPC_REL14: |
| 3403 | case R_PPC_REL14_BRTAKEN: |
| 3404 | case R_PPC_REL14_BRNTAKEN: |
| 3405 | case R_PPC_REL24: |
| 3406 | if (expecting_tls_get_addr |
| 3407 | && h != NULL |
| 3408 | && h == htab->tls_get_addr) |
| 3409 | { |
| 3410 | if (h->plt.refcount > 0) |
| 3411 | h->plt.refcount -= 1; |
| 3412 | } |
| 3413 | expecting_tls_get_addr = 0; |
| 3414 | continue; |
| 3415 | |
| 3416 | default: |
| 3417 | expecting_tls_get_addr = 0; |
| 3418 | continue; |
| 3419 | } |
| 3420 | |
| 3421 | if (h != NULL) |
| 3422 | { |
| 3423 | if (tls_set == 0) |
| 3424 | { |
| 3425 | /* We managed to get rid of a got entry. */ |
| 3426 | if (h->got.refcount > 0) |
| 3427 | h->got.refcount -= 1; |
| 3428 | } |
| 3429 | tls_mask = &ppc_elf_hash_entry (h)->tls_mask; |
| 3430 | } |
| 3431 | else |
| 3432 | { |
| 3433 | Elf_Internal_Sym *sym; |
| 3434 | bfd_signed_vma *lgot_refs; |
| 3435 | char *lgot_masks; |
| 3436 | |
| 3437 | if (locsyms == NULL) |
| 3438 | { |
| 3439 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 3440 | if (locsyms == NULL) |
| 3441 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| 3442 | symtab_hdr->sh_info, |
| 3443 | 0, NULL, NULL, NULL); |
| 3444 | if (locsyms == NULL) |
| 3445 | { |
| 3446 | if (elf_section_data (sec)->relocs != relstart) |
| 3447 | free (relstart); |
| 3448 | return FALSE; |
| 3449 | } |
| 3450 | } |
| 3451 | sym = locsyms + r_symndx; |
| 3452 | lgot_refs = elf_local_got_refcounts (ibfd); |
| 3453 | if (lgot_refs == NULL) |
| 3454 | abort (); |
| 3455 | if (tls_set == 0) |
| 3456 | { |
| 3457 | /* We managed to get rid of a got entry. */ |
| 3458 | if (lgot_refs[r_symndx] > 0) |
| 3459 | lgot_refs[r_symndx] -= 1; |
| 3460 | } |
| 3461 | lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info); |
| 3462 | tls_mask = &lgot_masks[r_symndx]; |
| 3463 | } |
| 3464 | |
| 3465 | *tls_mask |= tls_set; |
| 3466 | *tls_mask &= ~tls_clear; |
| 3467 | } |
| 3468 | |
| 3469 | if (elf_section_data (sec)->relocs != relstart) |
| 3470 | free (relstart); |
| 3471 | } |
| 3472 | |
| 3473 | if (locsyms != NULL |
| 3474 | && (symtab_hdr->contents != (unsigned char *) locsyms)) |
| 3475 | { |
| 3476 | if (!info->keep_memory) |
| 3477 | free (locsyms); |
| 3478 | else |
| 3479 | symtab_hdr->contents = (unsigned char *) locsyms; |
| 3480 | } |
| 3481 | } |
| 3482 | return TRUE; |
| 3483 | } |
| 3484 | \f |
| 3485 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 3486 | regular object. The current definition is in some section of the |
| 3487 | dynamic object, but we're not including those sections. We have to |
| 3488 | change the definition to something the rest of the link can |
| 3489 | understand. */ |
| 3490 | |
| 3491 | static bfd_boolean |
| 3492 | ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 3493 | struct elf_link_hash_entry *h) |
| 3494 | { |
| 3495 | struct ppc_elf_link_hash_table *htab; |
| 3496 | asection *s; |
| 3497 | unsigned int power_of_two; |
| 3498 | |
| 3499 | #ifdef DEBUG |
| 3500 | fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", |
| 3501 | h->root.root.string); |
| 3502 | #endif |
| 3503 | |
| 3504 | /* Make sure we know what is going on here. */ |
| 3505 | htab = ppc_elf_hash_table (info); |
| 3506 | BFD_ASSERT (htab->elf.dynobj != NULL |
| 3507 | && (h->needs_plt |
| 3508 | || h->u.weakdef != NULL |
| 3509 | || (h->def_dynamic |
| 3510 | && h->ref_regular |
| 3511 | && !h->def_regular))); |
| 3512 | |
| 3513 | /* Deal with function syms. */ |
| 3514 | if (h->type == STT_FUNC |
| 3515 | || h->needs_plt) |
| 3516 | { |
| 3517 | /* Clear procedure linkage table information for any symbol that |
| 3518 | won't need a .plt entry. */ |
| 3519 | if (h->plt.refcount <= 0 |
| 3520 | || SYMBOL_CALLS_LOCAL (info, h) |
| 3521 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 3522 | && h->root.type == bfd_link_hash_undefweak)) |
| 3523 | { |
| 3524 | /* A PLT entry is not required/allowed when: |
| 3525 | |
| 3526 | 1. We are not using ld.so; because then the PLT entry |
| 3527 | can't be set up, so we can't use one. In this case, |
| 3528 | ppc_elf_adjust_dynamic_symbol won't even be called. |
| 3529 | |
| 3530 | 2. GC has rendered the entry unused. |
| 3531 | |
| 3532 | 3. We know for certain that a call to this symbol |
| 3533 | will go to this object, or will remain undefined. */ |
| 3534 | h->plt.offset = (bfd_vma) -1; |
| 3535 | h->needs_plt = 0; |
| 3536 | } |
| 3537 | return TRUE; |
| 3538 | } |
| 3539 | else |
| 3540 | h->plt.offset = (bfd_vma) -1; |
| 3541 | |
| 3542 | /* If this is a weak symbol, and there is a real definition, the |
| 3543 | processor independent code will have arranged for us to see the |
| 3544 | real definition first, and we can just use the same value. */ |
| 3545 | if (h->u.weakdef != NULL) |
| 3546 | { |
| 3547 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 3548 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 3549 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 3550 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 3551 | if (ELIMINATE_COPY_RELOCS) |
| 3552 | h->non_got_ref = h->u.weakdef->non_got_ref; |
| 3553 | return TRUE; |
| 3554 | } |
| 3555 | |
| 3556 | /* This is a reference to a symbol defined by a dynamic object which |
| 3557 | is not a function. */ |
| 3558 | |
| 3559 | /* If we are creating a shared library, we must presume that the |
| 3560 | only references to the symbol are via the global offset table. |
| 3561 | For such cases we need not do anything here; the relocations will |
| 3562 | be handled correctly by relocate_section. */ |
| 3563 | if (info->shared) |
| 3564 | return TRUE; |
| 3565 | |
| 3566 | /* If there are no references to this symbol that do not use the |
| 3567 | GOT, we don't need to generate a copy reloc. */ |
| 3568 | if (!h->non_got_ref) |
| 3569 | return TRUE; |
| 3570 | |
| 3571 | if (ELIMINATE_COPY_RELOCS) |
| 3572 | { |
| 3573 | struct ppc_elf_dyn_relocs *p; |
| 3574 | for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
| 3575 | { |
| 3576 | s = p->sec->output_section; |
| 3577 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 3578 | break; |
| 3579 | } |
| 3580 | |
| 3581 | /* If we didn't find any dynamic relocs in read-only sections, then |
| 3582 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 3583 | if (p == NULL) |
| 3584 | { |
| 3585 | h->non_got_ref = 0; |
| 3586 | return TRUE; |
| 3587 | } |
| 3588 | } |
| 3589 | |
| 3590 | /* We must allocate the symbol in our .dynbss section, which will |
| 3591 | become part of the .bss section of the executable. There will be |
| 3592 | an entry for this symbol in the .dynsym section. The dynamic |
| 3593 | object will contain position independent code, so all references |
| 3594 | from the dynamic object to this symbol will go through the global |
| 3595 | offset table. The dynamic linker will use the .dynsym entry to |
| 3596 | determine the address it must put in the global offset table, so |
| 3597 | both the dynamic object and the regular object will refer to the |
| 3598 | same memory location for the variable. |
| 3599 | |
| 3600 | Of course, if the symbol is sufficiently small, we must instead |
| 3601 | allocate it in .sbss. FIXME: It would be better to do this if and |
| 3602 | only if there were actually SDAREL relocs for that symbol. */ |
| 3603 | |
| 3604 | if (h->size <= elf_gp_size (htab->elf.dynobj)) |
| 3605 | s = htab->dynsbss; |
| 3606 | else |
| 3607 | s = htab->dynbss; |
| 3608 | BFD_ASSERT (s != NULL); |
| 3609 | |
| 3610 | /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to |
| 3611 | copy the initial value out of the dynamic object and into the |
| 3612 | runtime process image. We need to remember the offset into the |
| 3613 | .rela.bss section we are going to use. */ |
| 3614 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 3615 | { |
| 3616 | asection *srel; |
| 3617 | |
| 3618 | if (h->size <= elf_gp_size (htab->elf.dynobj)) |
| 3619 | srel = htab->relsbss; |
| 3620 | else |
| 3621 | srel = htab->relbss; |
| 3622 | BFD_ASSERT (srel != NULL); |
| 3623 | srel->size += sizeof (Elf32_External_Rela); |
| 3624 | h->needs_copy = 1; |
| 3625 | } |
| 3626 | |
| 3627 | /* We need to figure out the alignment required for this symbol. I |
| 3628 | have no idea how ELF linkers handle this. */ |
| 3629 | power_of_two = bfd_log2 (h->size); |
| 3630 | if (power_of_two > 4) |
| 3631 | power_of_two = 4; |
| 3632 | |
| 3633 | /* Apply the required alignment. */ |
| 3634 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
| 3635 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
| 3636 | { |
| 3637 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
| 3638 | return FALSE; |
| 3639 | } |
| 3640 | |
| 3641 | /* Define the symbol as being at this point in the section. */ |
| 3642 | h->root.u.def.section = s; |
| 3643 | h->root.u.def.value = s->size; |
| 3644 | |
| 3645 | /* Increment the section size to make room for the symbol. */ |
| 3646 | s->size += h->size; |
| 3647 | |
| 3648 | return TRUE; |
| 3649 | } |
| 3650 | \f |
| 3651 | /* Allocate space in associated reloc sections for dynamic relocs. */ |
| 3652 | |
| 3653 | static bfd_boolean |
| 3654 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
| 3655 | { |
| 3656 | struct bfd_link_info *info = inf; |
| 3657 | struct ppc_elf_link_hash_entry *eh; |
| 3658 | struct ppc_elf_link_hash_table *htab; |
| 3659 | struct ppc_elf_dyn_relocs *p; |
| 3660 | |
| 3661 | if (h->root.type == bfd_link_hash_indirect) |
| 3662 | return TRUE; |
| 3663 | |
| 3664 | if (h->root.type == bfd_link_hash_warning) |
| 3665 | /* When warning symbols are created, they **replace** the "real" |
| 3666 | entry in the hash table, thus we never get to see the real |
| 3667 | symbol in a hash traversal. So look at it now. */ |
| 3668 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3669 | |
| 3670 | htab = ppc_elf_hash_table (info); |
| 3671 | if (htab->elf.dynamic_sections_created |
| 3672 | && h->plt.refcount > 0) |
| 3673 | { |
| 3674 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 3675 | if (h->dynindx == -1 |
| 3676 | && !h->forced_local) |
| 3677 | { |
| 3678 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 3679 | return FALSE; |
| 3680 | } |
| 3681 | |
| 3682 | if (info->shared |
| 3683 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 3684 | { |
| 3685 | asection *s = htab->plt; |
| 3686 | |
| 3687 | /* If this is the first .plt entry, make room for the special |
| 3688 | first entry. */ |
| 3689 | if (s->size == 0) |
| 3690 | s->size += PLT_INITIAL_ENTRY_SIZE; |
| 3691 | |
| 3692 | /* The PowerPC PLT is actually composed of two parts, the |
| 3693 | first part is 2 words (for a load and a jump), and then |
| 3694 | there is a remaining word available at the end. */ |
| 3695 | h->plt.offset = (PLT_INITIAL_ENTRY_SIZE |
| 3696 | + (PLT_SLOT_SIZE |
| 3697 | * ((s->size - PLT_INITIAL_ENTRY_SIZE) |
| 3698 | / PLT_ENTRY_SIZE))); |
| 3699 | |
| 3700 | /* If this symbol is not defined in a regular file, and we |
| 3701 | are not generating a shared library, then set the symbol |
| 3702 | to this location in the .plt. This is required to make |
| 3703 | function pointers compare as equal between the normal |
| 3704 | executable and the shared library. */ |
| 3705 | if (! info->shared |
| 3706 | && !h->def_regular) |
| 3707 | { |
| 3708 | h->root.u.def.section = s; |
| 3709 | h->root.u.def.value = h->plt.offset; |
| 3710 | } |
| 3711 | |
| 3712 | /* Make room for this entry. After the 8192nd entry, room |
| 3713 | for two entries is allocated. */ |
| 3714 | s->size += PLT_ENTRY_SIZE; |
| 3715 | if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE |
| 3716 | > PLT_NUM_SINGLE_ENTRIES) |
| 3717 | s->size += PLT_ENTRY_SIZE; |
| 3718 | |
| 3719 | /* We also need to make an entry in the .rela.plt section. */ |
| 3720 | htab->relplt->size += sizeof (Elf32_External_Rela); |
| 3721 | } |
| 3722 | else |
| 3723 | { |
| 3724 | h->plt.offset = (bfd_vma) -1; |
| 3725 | h->needs_plt = 0; |
| 3726 | } |
| 3727 | } |
| 3728 | else |
| 3729 | { |
| 3730 | h->plt.offset = (bfd_vma) -1; |
| 3731 | h->needs_plt = 0; |
| 3732 | } |
| 3733 | |
| 3734 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 3735 | if (eh->elf.got.refcount > 0) |
| 3736 | { |
| 3737 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 3738 | if (eh->elf.dynindx == -1 |
| 3739 | && !eh->elf.forced_local) |
| 3740 | { |
| 3741 | if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf)) |
| 3742 | return FALSE; |
| 3743 | } |
| 3744 | |
| 3745 | if (eh->tls_mask == (TLS_TLS | TLS_LD) |
| 3746 | && !eh->elf.def_dynamic) |
| 3747 | /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */ |
| 3748 | eh->elf.got.offset = (bfd_vma) -1; |
| 3749 | else |
| 3750 | { |
| 3751 | bfd_boolean dyn; |
| 3752 | eh->elf.got.offset = htab->got->size; |
| 3753 | if ((eh->tls_mask & TLS_TLS) != 0) |
| 3754 | { |
| 3755 | if ((eh->tls_mask & TLS_LD) != 0) |
| 3756 | htab->got->size += 8; |
| 3757 | if ((eh->tls_mask & TLS_GD) != 0) |
| 3758 | htab->got->size += 8; |
| 3759 | if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 3760 | htab->got->size += 4; |
| 3761 | if ((eh->tls_mask & TLS_DTPREL) != 0) |
| 3762 | htab->got->size += 4; |
| 3763 | } |
| 3764 | else |
| 3765 | htab->got->size += 4; |
| 3766 | dyn = htab->elf.dynamic_sections_created; |
| 3767 | if ((info->shared |
| 3768 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf)) |
| 3769 | && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT |
| 3770 | || eh->elf.root.type != bfd_link_hash_undefweak)) |
| 3771 | { |
| 3772 | /* All the entries we allocated need relocs. */ |
| 3773 | htab->relgot->size |
| 3774 | += ((htab->got->size - eh->elf.got.offset) / 4 |
| 3775 | * sizeof (Elf32_External_Rela)); |
| 3776 | /* Except LD only needs one. */ |
| 3777 | if ((eh->tls_mask & TLS_LD) != 0) |
| 3778 | htab->relgot->size -= sizeof (Elf32_External_Rela); |
| 3779 | } |
| 3780 | } |
| 3781 | } |
| 3782 | else |
| 3783 | eh->elf.got.offset = (bfd_vma) -1; |
| 3784 | |
| 3785 | if (eh->dyn_relocs == NULL) |
| 3786 | return TRUE; |
| 3787 | |
| 3788 | /* In the shared -Bsymbolic case, discard space allocated for |
| 3789 | dynamic pc-relative relocs against symbols which turn out to be |
| 3790 | defined in regular objects. For the normal shared case, discard |
| 3791 | space for relocs that have become local due to symbol visibility |
| 3792 | changes. */ |
| 3793 | |
| 3794 | if (info->shared) |
| 3795 | { |
| 3796 | /* Relocs that use pc_count are those that appear on a call insn, |
| 3797 | or certain REL relocs (see MUST_BE_DYN_RELOC) that can be |
| 3798 | generated via assembly. We want calls to protected symbols to |
| 3799 | resolve directly to the function rather than going via the plt. |
| 3800 | If people want function pointer comparisons to work as expected |
| 3801 | then they should avoid writing weird assembly. */ |
| 3802 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 3803 | { |
| 3804 | struct ppc_elf_dyn_relocs **pp; |
| 3805 | |
| 3806 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 3807 | { |
| 3808 | p->count -= p->pc_count; |
| 3809 | p->pc_count = 0; |
| 3810 | if (p->count == 0) |
| 3811 | *pp = p->next; |
| 3812 | else |
| 3813 | pp = &p->next; |
| 3814 | } |
| 3815 | } |
| 3816 | |
| 3817 | /* Also discard relocs on undefined weak syms with non-default |
| 3818 | visibility. */ |
| 3819 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 3820 | && h->root.type == bfd_link_hash_undefweak) |
| 3821 | eh->dyn_relocs = NULL; |
| 3822 | |
| 3823 | /* Make sure undefined weak symbols are output as a dynamic symbol |
| 3824 | in PIEs. */ |
| 3825 | if (info->pie |
| 3826 | && eh->dyn_relocs != NULL |
| 3827 | && h->dynindx == -1 |
| 3828 | && h->root.type == bfd_link_hash_undefweak |
| 3829 | && !h->forced_local) |
| 3830 | { |
| 3831 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 3832 | return FALSE; |
| 3833 | } |
| 3834 | } |
| 3835 | else if (ELIMINATE_COPY_RELOCS) |
| 3836 | { |
| 3837 | /* For the non-shared case, discard space for relocs against |
| 3838 | symbols which turn out to need copy relocs or are not |
| 3839 | dynamic. */ |
| 3840 | |
| 3841 | if (!h->non_got_ref |
| 3842 | && h->def_dynamic |
| 3843 | && !h->def_regular) |
| 3844 | { |
| 3845 | /* Make sure this symbol is output as a dynamic symbol. |
| 3846 | Undefined weak syms won't yet be marked as dynamic. */ |
| 3847 | if (h->dynindx == -1 |
| 3848 | && !h->forced_local) |
| 3849 | { |
| 3850 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 3851 | return FALSE; |
| 3852 | } |
| 3853 | |
| 3854 | /* If that succeeded, we know we'll be keeping all the |
| 3855 | relocs. */ |
| 3856 | if (h->dynindx != -1) |
| 3857 | goto keep; |
| 3858 | } |
| 3859 | |
| 3860 | eh->dyn_relocs = NULL; |
| 3861 | |
| 3862 | keep: ; |
| 3863 | } |
| 3864 | |
| 3865 | /* Finally, allocate space. */ |
| 3866 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 3867 | { |
| 3868 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
| 3869 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| 3870 | } |
| 3871 | |
| 3872 | return TRUE; |
| 3873 | } |
| 3874 | |
| 3875 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 3876 | |
| 3877 | static bfd_boolean |
| 3878 | readonly_dynrelocs (struct elf_link_hash_entry *h, void *info) |
| 3879 | { |
| 3880 | struct ppc_elf_dyn_relocs *p; |
| 3881 | |
| 3882 | if (h->root.type == bfd_link_hash_indirect) |
| 3883 | return TRUE; |
| 3884 | |
| 3885 | if (h->root.type == bfd_link_hash_warning) |
| 3886 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 3887 | |
| 3888 | for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
| 3889 | { |
| 3890 | asection *s = p->sec->output_section; |
| 3891 | |
| 3892 | if (s != NULL |
| 3893 | && ((s->flags & (SEC_READONLY | SEC_ALLOC)) |
| 3894 | == (SEC_READONLY | SEC_ALLOC))) |
| 3895 | { |
| 3896 | ((struct bfd_link_info *) info)->flags |= DF_TEXTREL; |
| 3897 | |
| 3898 | /* Not an error, just cut short the traversal. */ |
| 3899 | return FALSE; |
| 3900 | } |
| 3901 | } |
| 3902 | return TRUE; |
| 3903 | } |
| 3904 | |
| 3905 | /* Set the sizes of the dynamic sections. */ |
| 3906 | |
| 3907 | static bfd_boolean |
| 3908 | ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 3909 | struct bfd_link_info *info) |
| 3910 | { |
| 3911 | struct ppc_elf_link_hash_table *htab; |
| 3912 | asection *s; |
| 3913 | bfd_boolean relocs; |
| 3914 | bfd *ibfd; |
| 3915 | |
| 3916 | #ifdef DEBUG |
| 3917 | fprintf (stderr, "ppc_elf_size_dynamic_sections called\n"); |
| 3918 | #endif |
| 3919 | |
| 3920 | htab = ppc_elf_hash_table (info); |
| 3921 | BFD_ASSERT (htab->elf.dynobj != NULL); |
| 3922 | |
| 3923 | if (elf_hash_table (info)->dynamic_sections_created) |
| 3924 | { |
| 3925 | /* Set the contents of the .interp section to the interpreter. */ |
| 3926 | if (info->executable) |
| 3927 | { |
| 3928 | s = bfd_get_section_by_name (htab->elf.dynobj, ".interp"); |
| 3929 | BFD_ASSERT (s != NULL); |
| 3930 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 3931 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 3932 | } |
| 3933 | } |
| 3934 | |
| 3935 | if (htab->tlsld_got.refcount > 0) |
| 3936 | { |
| 3937 | htab->tlsld_got.offset = htab->got->size; |
| 3938 | htab->got->size += 8; |
| 3939 | if (info->shared) |
| 3940 | htab->relgot->size += sizeof (Elf32_External_Rela); |
| 3941 | } |
| 3942 | else |
| 3943 | htab->tlsld_got.offset = (bfd_vma) -1; |
| 3944 | |
| 3945 | /* Set up .got offsets for local syms, and space for local dynamic |
| 3946 | relocs. */ |
| 3947 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 3948 | { |
| 3949 | bfd_signed_vma *local_got; |
| 3950 | bfd_signed_vma *end_local_got; |
| 3951 | char *lgot_masks; |
| 3952 | bfd_size_type locsymcount; |
| 3953 | Elf_Internal_Shdr *symtab_hdr; |
| 3954 | asection *srel; |
| 3955 | |
| 3956 | if (!is_ppc_elf_target (ibfd->xvec)) |
| 3957 | continue; |
| 3958 | |
| 3959 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 3960 | { |
| 3961 | struct ppc_elf_dyn_relocs *p; |
| 3962 | |
| 3963 | for (p = ((struct ppc_elf_dyn_relocs *) |
| 3964 | elf_section_data (s)->local_dynrel); |
| 3965 | p != NULL; |
| 3966 | p = p->next) |
| 3967 | { |
| 3968 | if (!bfd_is_abs_section (p->sec) |
| 3969 | && bfd_is_abs_section (p->sec->output_section)) |
| 3970 | { |
| 3971 | /* Input section has been discarded, either because |
| 3972 | it is a copy of a linkonce section or due to |
| 3973 | linker script /DISCARD/, so we'll be discarding |
| 3974 | the relocs too. */ |
| 3975 | } |
| 3976 | else if (p->count != 0) |
| 3977 | { |
| 3978 | elf_section_data (p->sec)->sreloc->size |
| 3979 | += p->count * sizeof (Elf32_External_Rela); |
| 3980 | if ((p->sec->output_section->flags |
| 3981 | & (SEC_READONLY | SEC_ALLOC)) |
| 3982 | == (SEC_READONLY | SEC_ALLOC)) |
| 3983 | info->flags |= DF_TEXTREL; |
| 3984 | } |
| 3985 | } |
| 3986 | } |
| 3987 | |
| 3988 | local_got = elf_local_got_refcounts (ibfd); |
| 3989 | if (!local_got) |
| 3990 | continue; |
| 3991 | |
| 3992 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 3993 | locsymcount = symtab_hdr->sh_info; |
| 3994 | end_local_got = local_got + locsymcount; |
| 3995 | lgot_masks = (char *) end_local_got; |
| 3996 | s = htab->got; |
| 3997 | srel = htab->relgot; |
| 3998 | for (; local_got < end_local_got; ++local_got, ++lgot_masks) |
| 3999 | if (*local_got > 0) |
| 4000 | { |
| 4001 | if (*lgot_masks == (TLS_TLS | TLS_LD)) |
| 4002 | { |
| 4003 | /* If just an LD reloc, we'll just use |
| 4004 | htab->tlsld_got.offset. */ |
| 4005 | if (htab->tlsld_got.offset == (bfd_vma) -1) |
| 4006 | { |
| 4007 | htab->tlsld_got.offset = s->size; |
| 4008 | s->size += 8; |
| 4009 | if (info->shared) |
| 4010 | srel->size += sizeof (Elf32_External_Rela); |
| 4011 | } |
| 4012 | *local_got = (bfd_vma) -1; |
| 4013 | } |
| 4014 | else |
| 4015 | { |
| 4016 | *local_got = s->size; |
| 4017 | if ((*lgot_masks & TLS_TLS) != 0) |
| 4018 | { |
| 4019 | if ((*lgot_masks & TLS_GD) != 0) |
| 4020 | s->size += 8; |
| 4021 | if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 4022 | s->size += 4; |
| 4023 | if ((*lgot_masks & TLS_DTPREL) != 0) |
| 4024 | s->size += 4; |
| 4025 | } |
| 4026 | else |
| 4027 | s->size += 4; |
| 4028 | if (info->shared) |
| 4029 | srel->size += ((s->size - *local_got) / 4 |
| 4030 | * sizeof (Elf32_External_Rela)); |
| 4031 | } |
| 4032 | } |
| 4033 | else |
| 4034 | *local_got = (bfd_vma) -1; |
| 4035 | } |
| 4036 | |
| 4037 | /* Allocate space for global sym dynamic relocs. */ |
| 4038 | elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); |
| 4039 | |
| 4040 | /* We've now determined the sizes of the various dynamic sections. |
| 4041 | Allocate memory for them. */ |
| 4042 | relocs = FALSE; |
| 4043 | for (s = htab->elf.dynobj->sections; s != NULL; s = s->next) |
| 4044 | { |
| 4045 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 4046 | continue; |
| 4047 | |
| 4048 | if (s == htab->plt |
| 4049 | || s == htab->got |
| 4050 | || s == htab->sbss) |
| 4051 | { |
| 4052 | /* Strip this section if we don't need it; see the |
| 4053 | comment below. */ |
| 4054 | } |
| 4055 | else if (s == htab->sdata[0].section |
| 4056 | || s == htab->sdata[1].section) |
| 4057 | { |
| 4058 | /* Strip these too. */ |
| 4059 | } |
| 4060 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
| 4061 | { |
| 4062 | if (s->size == 0) |
| 4063 | { |
| 4064 | /* If we don't need this section, strip it from the |
| 4065 | output file. This is mostly to handle .rela.bss and |
| 4066 | .rela.plt. We must create both sections in |
| 4067 | create_dynamic_sections, because they must be created |
| 4068 | before the linker maps input sections to output |
| 4069 | sections. The linker does that before |
| 4070 | adjust_dynamic_symbol is called, and it is that |
| 4071 | function which decides whether anything needs to go |
| 4072 | into these sections. */ |
| 4073 | } |
| 4074 | else |
| 4075 | { |
| 4076 | /* Remember whether there are any relocation sections. */ |
| 4077 | relocs = TRUE; |
| 4078 | |
| 4079 | /* We use the reloc_count field as a counter if we need |
| 4080 | to copy relocs into the output file. */ |
| 4081 | s->reloc_count = 0; |
| 4082 | } |
| 4083 | } |
| 4084 | else |
| 4085 | { |
| 4086 | /* It's not one of our sections, so don't allocate space. */ |
| 4087 | continue; |
| 4088 | } |
| 4089 | |
| 4090 | if (s->size == 0) |
| 4091 | { |
| 4092 | s->flags |= SEC_EXCLUDE; |
| 4093 | continue; |
| 4094 | } |
| 4095 | |
| 4096 | if (s == htab->sbss) |
| 4097 | continue; |
| 4098 | |
| 4099 | /* Allocate memory for the section contents. */ |
| 4100 | s->contents = bfd_zalloc (htab->elf.dynobj, s->size); |
| 4101 | if (s->contents == NULL) |
| 4102 | return FALSE; |
| 4103 | } |
| 4104 | |
| 4105 | if (htab->elf.dynamic_sections_created) |
| 4106 | { |
| 4107 | /* Add some entries to the .dynamic section. We fill in the |
| 4108 | values later, in ppc_elf_finish_dynamic_sections, but we |
| 4109 | must add the entries now so that we get the correct size for |
| 4110 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 4111 | dynamic linker and used by the debugger. */ |
| 4112 | #define add_dynamic_entry(TAG, VAL) \ |
| 4113 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 4114 | |
| 4115 | if (info->executable) |
| 4116 | { |
| 4117 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 4118 | return FALSE; |
| 4119 | } |
| 4120 | |
| 4121 | if (htab->plt != NULL && htab->plt->size != 0) |
| 4122 | { |
| 4123 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 4124 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 4125 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 4126 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 4127 | return FALSE; |
| 4128 | } |
| 4129 | |
| 4130 | if (relocs) |
| 4131 | { |
| 4132 | if (!add_dynamic_entry (DT_RELA, 0) |
| 4133 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 4134 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 4135 | return FALSE; |
| 4136 | } |
| 4137 | |
| 4138 | /* If any dynamic relocs apply to a read-only section, then we |
| 4139 | need a DT_TEXTREL entry. */ |
| 4140 | if ((info->flags & DF_TEXTREL) == 0) |
| 4141 | elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs, |
| 4142 | info); |
| 4143 | |
| 4144 | if ((info->flags & DF_TEXTREL) != 0) |
| 4145 | { |
| 4146 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 4147 | return FALSE; |
| 4148 | } |
| 4149 | } |
| 4150 | #undef add_dynamic_entry |
| 4151 | |
| 4152 | return TRUE; |
| 4153 | } |
| 4154 | \f |
| 4155 | #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) |
| 4156 | |
| 4157 | static const int shared_stub_entry[] = |
| 4158 | { |
| 4159 | 0x7c0802a6, /* mflr 0 */ |
| 4160 | 0x429f0005, /* bcl 20, 31, .Lxxx */ |
| 4161 | 0x7d6802a6, /* mflr 11 */ |
| 4162 | 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */ |
| 4163 | 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */ |
| 4164 | 0x7c0803a6, /* mtlr 0 */ |
| 4165 | 0x7d6903a6, /* mtctr 11 */ |
| 4166 | 0x4e800420, /* bctr */ |
| 4167 | }; |
| 4168 | |
| 4169 | static const int stub_entry[] = |
| 4170 | { |
| 4171 | 0x3d600000, /* lis 11,xxx@ha */ |
| 4172 | 0x396b0000, /* addi 11,11,xxx@l */ |
| 4173 | 0x7d6903a6, /* mtctr 11 */ |
| 4174 | 0x4e800420, /* bctr */ |
| 4175 | }; |
| 4176 | |
| 4177 | static bfd_boolean |
| 4178 | ppc_elf_relax_section (bfd *abfd, |
| 4179 | asection *isec, |
| 4180 | struct bfd_link_info *link_info, |
| 4181 | bfd_boolean *again) |
| 4182 | { |
| 4183 | struct one_fixup |
| 4184 | { |
| 4185 | struct one_fixup *next; |
| 4186 | asection *tsec; |
| 4187 | bfd_vma toff; |
| 4188 | bfd_vma trampoff; |
| 4189 | }; |
| 4190 | |
| 4191 | Elf_Internal_Shdr *symtab_hdr; |
| 4192 | bfd_byte *contents = NULL; |
| 4193 | Elf_Internal_Sym *isymbuf = NULL; |
| 4194 | Elf_Internal_Rela *internal_relocs = NULL; |
| 4195 | Elf_Internal_Rela *irel, *irelend; |
| 4196 | struct one_fixup *fixups = NULL; |
| 4197 | bfd_boolean changed; |
| 4198 | struct ppc_elf_link_hash_table *ppc_info; |
| 4199 | bfd_size_type trampoff; |
| 4200 | |
| 4201 | *again = FALSE; |
| 4202 | |
| 4203 | /* Nothing to do if there are no relocations, and no need to do |
| 4204 | anything with non-alloc sections. */ |
| 4205 | if ((isec->flags & SEC_ALLOC) == 0 |
| 4206 | || (isec->flags & SEC_RELOC) == 0 |
| 4207 | || isec->reloc_count == 0) |
| 4208 | return TRUE; |
| 4209 | |
| 4210 | trampoff = (isec->size + 3) & (bfd_vma) -4; |
| 4211 | /* Space for a branch around any trampolines. */ |
| 4212 | trampoff += 4; |
| 4213 | |
| 4214 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 4215 | |
| 4216 | /* Get a copy of the native relocations. */ |
| 4217 | internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, |
| 4218 | link_info->keep_memory); |
| 4219 | if (internal_relocs == NULL) |
| 4220 | goto error_return; |
| 4221 | |
| 4222 | ppc_info = ppc_elf_hash_table (link_info); |
| 4223 | irelend = internal_relocs + isec->reloc_count; |
| 4224 | |
| 4225 | for (irel = internal_relocs; irel < irelend; irel++) |
| 4226 | { |
| 4227 | unsigned long r_type = ELF32_R_TYPE (irel->r_info); |
| 4228 | bfd_vma symaddr, reladdr, toff, roff; |
| 4229 | asection *tsec; |
| 4230 | struct one_fixup *f; |
| 4231 | size_t insn_offset = 0; |
| 4232 | bfd_vma max_branch_offset, val; |
| 4233 | bfd_byte *hit_addr; |
| 4234 | unsigned long t0; |
| 4235 | unsigned char sym_type; |
| 4236 | |
| 4237 | switch (r_type) |
| 4238 | { |
| 4239 | case R_PPC_REL24: |
| 4240 | case R_PPC_LOCAL24PC: |
| 4241 | case R_PPC_PLTREL24: |
| 4242 | max_branch_offset = 1 << 25; |
| 4243 | break; |
| 4244 | |
| 4245 | case R_PPC_REL14: |
| 4246 | case R_PPC_REL14_BRTAKEN: |
| 4247 | case R_PPC_REL14_BRNTAKEN: |
| 4248 | max_branch_offset = 1 << 15; |
| 4249 | break; |
| 4250 | |
| 4251 | default: |
| 4252 | continue; |
| 4253 | } |
| 4254 | |
| 4255 | /* Get the value of the symbol referred to by the reloc. */ |
| 4256 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 4257 | { |
| 4258 | /* A local symbol. */ |
| 4259 | Elf_Internal_Sym *isym; |
| 4260 | |
| 4261 | /* Read this BFD's local symbols. */ |
| 4262 | if (isymbuf == NULL) |
| 4263 | { |
| 4264 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 4265 | if (isymbuf == NULL) |
| 4266 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 4267 | symtab_hdr->sh_info, 0, |
| 4268 | NULL, NULL, NULL); |
| 4269 | if (isymbuf == 0) |
| 4270 | goto error_return; |
| 4271 | } |
| 4272 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 4273 | if (isym->st_shndx == SHN_UNDEF) |
| 4274 | continue; /* We can't do anything with undefined symbols. */ |
| 4275 | else if (isym->st_shndx == SHN_ABS) |
| 4276 | tsec = bfd_abs_section_ptr; |
| 4277 | else if (isym->st_shndx == SHN_COMMON) |
| 4278 | tsec = bfd_com_section_ptr; |
| 4279 | else |
| 4280 | tsec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 4281 | |
| 4282 | toff = isym->st_value; |
| 4283 | sym_type = ELF_ST_TYPE (isym->st_info); |
| 4284 | } |
| 4285 | else |
| 4286 | { |
| 4287 | /* Global symbol handling. */ |
| 4288 | unsigned long indx; |
| 4289 | struct elf_link_hash_entry *h; |
| 4290 | |
| 4291 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 4292 | h = elf_sym_hashes (abfd)[indx]; |
| 4293 | |
| 4294 | while (h->root.type == bfd_link_hash_indirect |
| 4295 | || h->root.type == bfd_link_hash_warning) |
| 4296 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 4297 | |
| 4298 | if (r_type == R_PPC_PLTREL24 |
| 4299 | && ppc_info->plt != NULL |
| 4300 | && h->plt.offset != (bfd_vma) -1) |
| 4301 | { |
| 4302 | tsec = ppc_info->plt; |
| 4303 | toff = h->plt.offset; |
| 4304 | } |
| 4305 | else if (h->root.type == bfd_link_hash_defined |
| 4306 | || h->root.type == bfd_link_hash_defweak) |
| 4307 | { |
| 4308 | tsec = h->root.u.def.section; |
| 4309 | toff = h->root.u.def.value; |
| 4310 | } |
| 4311 | else |
| 4312 | continue; |
| 4313 | |
| 4314 | sym_type = h->type; |
| 4315 | } |
| 4316 | |
| 4317 | /* If the branch and target are in the same section, you have |
| 4318 | no hope of adding stubs. We'll error out later should the |
| 4319 | branch overflow. */ |
| 4320 | if (tsec == isec) |
| 4321 | continue; |
| 4322 | |
| 4323 | /* There probably isn't any reason to handle symbols in |
| 4324 | SEC_MERGE sections; SEC_MERGE doesn't seem a likely |
| 4325 | attribute for a code section, and we are only looking at |
| 4326 | branches. However, implement it correctly here as a |
| 4327 | reference for other target relax_section functions. */ |
| 4328 | if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE) |
| 4329 | { |
| 4330 | /* At this stage in linking, no SEC_MERGE symbol has been |
| 4331 | adjusted, so all references to such symbols need to be |
| 4332 | passed through _bfd_merged_section_offset. (Later, in |
| 4333 | relocate_section, all SEC_MERGE symbols *except* for |
| 4334 | section symbols have been adjusted.) |
| 4335 | |
| 4336 | gas may reduce relocations against symbols in SEC_MERGE |
| 4337 | sections to a relocation against the section symbol when |
| 4338 | the original addend was zero. When the reloc is against |
| 4339 | a section symbol we should include the addend in the |
| 4340 | offset passed to _bfd_merged_section_offset, since the |
| 4341 | location of interest is the original symbol. On the |
| 4342 | other hand, an access to "sym+addend" where "sym" is not |
| 4343 | a section symbol should not include the addend; Such an |
| 4344 | access is presumed to be an offset from "sym"; The |
| 4345 | location of interest is just "sym". */ |
| 4346 | if (sym_type == STT_SECTION) |
| 4347 | toff += irel->r_addend; |
| 4348 | |
| 4349 | toff = _bfd_merged_section_offset (abfd, &tsec, |
| 4350 | elf_section_data (tsec)->sec_info, |
| 4351 | toff); |
| 4352 | |
| 4353 | if (sym_type != STT_SECTION) |
| 4354 | toff += irel->r_addend; |
| 4355 | } |
| 4356 | else |
| 4357 | toff += irel->r_addend; |
| 4358 | |
| 4359 | symaddr = tsec->output_section->vma + tsec->output_offset + toff; |
| 4360 | |
| 4361 | roff = irel->r_offset; |
| 4362 | reladdr = isec->output_section->vma + isec->output_offset + roff; |
| 4363 | |
| 4364 | /* If the branch is in range, no need to do anything. */ |
| 4365 | if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset) |
| 4366 | continue; |
| 4367 | |
| 4368 | /* Look for an existing fixup to this address. */ |
| 4369 | for (f = fixups; f ; f = f->next) |
| 4370 | if (f->tsec == tsec && f->toff == toff) |
| 4371 | break; |
| 4372 | |
| 4373 | if (f == NULL) |
| 4374 | { |
| 4375 | size_t size; |
| 4376 | unsigned long stub_rtype; |
| 4377 | |
| 4378 | val = trampoff - roff; |
| 4379 | if (val >= max_branch_offset) |
| 4380 | /* Oh dear, we can't reach a trampoline. Don't try to add |
| 4381 | one. We'll report an error later. */ |
| 4382 | continue; |
| 4383 | |
| 4384 | if (link_info->shared) |
| 4385 | { |
| 4386 | size = 4 * ARRAY_SIZE (shared_stub_entry); |
| 4387 | insn_offset = 12; |
| 4388 | stub_rtype = R_PPC_RELAX32PC; |
| 4389 | } |
| 4390 | else |
| 4391 | { |
| 4392 | size = 4 * ARRAY_SIZE (stub_entry); |
| 4393 | insn_offset = 0; |
| 4394 | stub_rtype = R_PPC_RELAX32; |
| 4395 | } |
| 4396 | |
| 4397 | if (R_PPC_RELAX32_PLT - R_PPC_RELAX32 |
| 4398 | != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC) |
| 4399 | abort (); |
| 4400 | if (tsec == ppc_info->plt) |
| 4401 | stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32; |
| 4402 | |
| 4403 | /* Hijack the old relocation. Since we need two |
| 4404 | relocations for this use a "composite" reloc. */ |
| 4405 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 4406 | stub_rtype); |
| 4407 | irel->r_offset = trampoff + insn_offset; |
| 4408 | |
| 4409 | /* Record the fixup so we don't do it again this section. */ |
| 4410 | f = bfd_malloc (sizeof (*f)); |
| 4411 | f->next = fixups; |
| 4412 | f->tsec = tsec; |
| 4413 | f->toff = toff; |
| 4414 | f->trampoff = trampoff; |
| 4415 | fixups = f; |
| 4416 | |
| 4417 | trampoff += size; |
| 4418 | } |
| 4419 | else |
| 4420 | { |
| 4421 | val = f->trampoff - roff; |
| 4422 | if (val >= max_branch_offset) |
| 4423 | continue; |
| 4424 | |
| 4425 | /* Nop out the reloc, since we're finalizing things here. */ |
| 4426 | irel->r_info = ELF32_R_INFO (0, R_PPC_NONE); |
| 4427 | } |
| 4428 | |
| 4429 | /* Get the section contents. */ |
| 4430 | if (contents == NULL) |
| 4431 | { |
| 4432 | /* Get cached copy if it exists. */ |
| 4433 | if (elf_section_data (isec)->this_hdr.contents != NULL) |
| 4434 | contents = elf_section_data (isec)->this_hdr.contents; |
| 4435 | else |
| 4436 | { |
| 4437 | /* Go get them off disk. */ |
| 4438 | if (!bfd_malloc_and_get_section (abfd, isec, &contents)) |
| 4439 | goto error_return; |
| 4440 | } |
| 4441 | } |
| 4442 | |
| 4443 | /* Fix up the existing branch to hit the trampoline. */ |
| 4444 | hit_addr = contents + roff; |
| 4445 | switch (r_type) |
| 4446 | { |
| 4447 | case R_PPC_REL24: |
| 4448 | case R_PPC_LOCAL24PC: |
| 4449 | case R_PPC_PLTREL24: |
| 4450 | t0 = bfd_get_32 (abfd, hit_addr); |
| 4451 | t0 &= ~0x3fffffc; |
| 4452 | t0 |= val & 0x3fffffc; |
| 4453 | bfd_put_32 (abfd, t0, hit_addr); |
| 4454 | break; |
| 4455 | |
| 4456 | case R_PPC_REL14: |
| 4457 | case R_PPC_REL14_BRTAKEN: |
| 4458 | case R_PPC_REL14_BRNTAKEN: |
| 4459 | t0 = bfd_get_32 (abfd, hit_addr); |
| 4460 | t0 &= ~0xfffc; |
| 4461 | t0 |= val & 0xfffc; |
| 4462 | bfd_put_32 (abfd, t0, hit_addr); |
| 4463 | break; |
| 4464 | } |
| 4465 | } |
| 4466 | |
| 4467 | /* Write out the trampolines. */ |
| 4468 | changed = fixups != NULL; |
| 4469 | if (fixups != NULL) |
| 4470 | { |
| 4471 | const int *stub; |
| 4472 | bfd_byte *dest; |
| 4473 | bfd_vma val; |
| 4474 | int i, size; |
| 4475 | |
| 4476 | do |
| 4477 | { |
| 4478 | struct one_fixup *f = fixups; |
| 4479 | fixups = fixups->next; |
| 4480 | free (f); |
| 4481 | } |
| 4482 | while (fixups); |
| 4483 | |
| 4484 | contents = bfd_realloc (contents, trampoff); |
| 4485 | if (contents == NULL) |
| 4486 | goto error_return; |
| 4487 | |
| 4488 | isec->size = (isec->size + 3) & (bfd_vma) -4; |
| 4489 | /* Branch around the trampolines. */ |
| 4490 | val = trampoff - isec->size + 0x48000000; |
| 4491 | dest = contents + isec->size; |
| 4492 | isec->size = trampoff; |
| 4493 | bfd_put_32 (abfd, val, dest); |
| 4494 | dest += 4; |
| 4495 | |
| 4496 | if (link_info->shared) |
| 4497 | { |
| 4498 | stub = shared_stub_entry; |
| 4499 | size = ARRAY_SIZE (shared_stub_entry); |
| 4500 | } |
| 4501 | else |
| 4502 | { |
| 4503 | stub = stub_entry; |
| 4504 | size = ARRAY_SIZE (stub_entry); |
| 4505 | } |
| 4506 | |
| 4507 | i = 0; |
| 4508 | while (dest < contents + trampoff) |
| 4509 | { |
| 4510 | bfd_put_32 (abfd, stub[i], dest); |
| 4511 | i++; |
| 4512 | if (i == size) |
| 4513 | i = 0; |
| 4514 | dest += 4; |
| 4515 | } |
| 4516 | BFD_ASSERT (i == 0); |
| 4517 | } |
| 4518 | |
| 4519 | if (isymbuf != NULL |
| 4520 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 4521 | { |
| 4522 | if (! link_info->keep_memory) |
| 4523 | free (isymbuf); |
| 4524 | else |
| 4525 | { |
| 4526 | /* Cache the symbols for elf_link_input_bfd. */ |
| 4527 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 4528 | } |
| 4529 | } |
| 4530 | |
| 4531 | if (contents != NULL |
| 4532 | && elf_section_data (isec)->this_hdr.contents != contents) |
| 4533 | { |
| 4534 | if (!changed && !link_info->keep_memory) |
| 4535 | free (contents); |
| 4536 | else |
| 4537 | { |
| 4538 | /* Cache the section contents for elf_link_input_bfd. */ |
| 4539 | elf_section_data (isec)->this_hdr.contents = contents; |
| 4540 | } |
| 4541 | } |
| 4542 | |
| 4543 | if (elf_section_data (isec)->relocs != internal_relocs) |
| 4544 | { |
| 4545 | if (!changed) |
| 4546 | free (internal_relocs); |
| 4547 | else |
| 4548 | elf_section_data (isec)->relocs = internal_relocs; |
| 4549 | } |
| 4550 | |
| 4551 | *again = changed; |
| 4552 | return TRUE; |
| 4553 | |
| 4554 | error_return: |
| 4555 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
| 4556 | free (isymbuf); |
| 4557 | if (contents != NULL |
| 4558 | && elf_section_data (isec)->this_hdr.contents != contents) |
| 4559 | free (contents); |
| 4560 | if (internal_relocs != NULL |
| 4561 | && elf_section_data (isec)->relocs != internal_relocs) |
| 4562 | free (internal_relocs); |
| 4563 | return FALSE; |
| 4564 | } |
| 4565 | \f |
| 4566 | /* Set _SDA_BASE_, _SDA2_BASE, and sbss start and end syms. They are |
| 4567 | set here rather than via PROVIDE in the default linker script, |
| 4568 | because using PROVIDE inside an output section statement results in |
| 4569 | unnecessary output sections. Using PROVIDE outside an output section |
| 4570 | statement runs the risk of section alignment affecting where the |
| 4571 | section starts. */ |
| 4572 | |
| 4573 | bfd_boolean |
| 4574 | ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info) |
| 4575 | { |
| 4576 | struct ppc_elf_link_hash_table *htab; |
| 4577 | unsigned i; |
| 4578 | asection *s; |
| 4579 | bfd_vma val; |
| 4580 | |
| 4581 | htab = ppc_elf_hash_table (info); |
| 4582 | |
| 4583 | for (i = 0; i < 2; i++) |
| 4584 | { |
| 4585 | elf_linker_section_t *lsect = &htab->sdata[i]; |
| 4586 | |
| 4587 | s = lsect->section; |
| 4588 | if (s != NULL) |
| 4589 | s = s->output_section; |
| 4590 | if (s == NULL) |
| 4591 | s = bfd_get_section_by_name (obfd, lsect->name); |
| 4592 | if (s == NULL) |
| 4593 | s = bfd_get_section_by_name (obfd, lsect->bss_name); |
| 4594 | |
| 4595 | val = 0; |
| 4596 | if (s != NULL) |
| 4597 | val = s->vma + 32768; |
| 4598 | lsect->sym_val = val; |
| 4599 | |
| 4600 | _bfd_elf_provide_symbol (info, lsect->sym_name, val); |
| 4601 | } |
| 4602 | |
| 4603 | s = bfd_get_section_by_name (obfd, ".sbss"); |
| 4604 | val = 0; |
| 4605 | if (s != NULL) |
| 4606 | val = s->vma; |
| 4607 | _bfd_elf_provide_symbol (info, "__sbss_start", val); |
| 4608 | _bfd_elf_provide_symbol (info, "___sbss_start", val); |
| 4609 | if (s != NULL) |
| 4610 | val += s->size; |
| 4611 | _bfd_elf_provide_symbol (info, "__sbss_end", val); |
| 4612 | _bfd_elf_provide_symbol (info, "___sbss_end", val); |
| 4613 | return TRUE; |
| 4614 | } |
| 4615 | \f |
| 4616 | /* Fill in the address for a pointer generated in a linker section. */ |
| 4617 | |
| 4618 | static bfd_vma |
| 4619 | elf_finish_pointer_linker_section (bfd *input_bfd, |
| 4620 | elf_linker_section_t *lsect, |
| 4621 | struct elf_link_hash_entry *h, |
| 4622 | bfd_vma relocation, |
| 4623 | const Elf_Internal_Rela *rel) |
| 4624 | { |
| 4625 | elf_linker_section_pointers_t *linker_section_ptr; |
| 4626 | |
| 4627 | BFD_ASSERT (lsect != NULL); |
| 4628 | |
| 4629 | if (h != NULL) |
| 4630 | { |
| 4631 | /* Handle global symbol. */ |
| 4632 | struct ppc_elf_link_hash_entry *eh; |
| 4633 | |
| 4634 | eh = (struct ppc_elf_link_hash_entry *) h; |
| 4635 | BFD_ASSERT (eh->elf.def_regular); |
| 4636 | linker_section_ptr = eh->linker_section_pointer; |
| 4637 | } |
| 4638 | else |
| 4639 | { |
| 4640 | /* Handle local symbol. */ |
| 4641 | unsigned long r_symndx = ELF32_R_SYM (rel->r_info); |
| 4642 | |
| 4643 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); |
| 4644 | linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx]; |
| 4645 | } |
| 4646 | |
| 4647 | linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr, |
| 4648 | rel->r_addend, |
| 4649 | lsect); |
| 4650 | BFD_ASSERT (linker_section_ptr != NULL); |
| 4651 | |
| 4652 | /* Offset will always be a multiple of four, so use the bottom bit |
| 4653 | as a "written" flag. */ |
| 4654 | if ((linker_section_ptr->offset & 1) == 0) |
| 4655 | { |
| 4656 | bfd_put_32 (lsect->section->owner, |
| 4657 | relocation + linker_section_ptr->addend, |
| 4658 | lsect->section->contents + linker_section_ptr->offset); |
| 4659 | linker_section_ptr->offset += 1; |
| 4660 | } |
| 4661 | |
| 4662 | relocation = (lsect->section->output_offset |
| 4663 | + linker_section_ptr->offset - 1 |
| 4664 | - 0x8000); |
| 4665 | |
| 4666 | #ifdef DEBUG |
| 4667 | fprintf (stderr, |
| 4668 | "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", |
| 4669 | lsect->name, (long) relocation, (long) relocation); |
| 4670 | #endif |
| 4671 | |
| 4672 | /* Subtract out the addend, because it will get added back in by the normal |
| 4673 | processing. */ |
| 4674 | return relocation - linker_section_ptr->addend; |
| 4675 | } |
| 4676 | |
| 4677 | /* The RELOCATE_SECTION function is called by the ELF backend linker |
| 4678 | to handle the relocations for a section. |
| 4679 | |
| 4680 | The relocs are always passed as Rela structures; if the section |
| 4681 | actually uses Rel structures, the r_addend field will always be |
| 4682 | zero. |
| 4683 | |
| 4684 | This function is responsible for adjust the section contents as |
| 4685 | necessary, and (if using Rela relocs and generating a |
| 4686 | relocatable output file) adjusting the reloc addend as |
| 4687 | necessary. |
| 4688 | |
| 4689 | This function does not have to worry about setting the reloc |
| 4690 | address or the reloc symbol index. |
| 4691 | |
| 4692 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 4693 | |
| 4694 | LOCAL_SECTIONS is an array giving the section in the input file |
| 4695 | corresponding to the st_shndx field of each local symbol. |
| 4696 | |
| 4697 | The global hash table entry for the global symbols can be found |
| 4698 | via elf_sym_hashes (input_bfd). |
| 4699 | |
| 4700 | When generating relocatable output, this function must handle |
| 4701 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 4702 | going to be the section symbol corresponding to the output |
| 4703 | section, which means that the addend must be adjusted |
| 4704 | accordingly. */ |
| 4705 | |
| 4706 | static bfd_boolean |
| 4707 | ppc_elf_relocate_section (bfd *output_bfd, |
| 4708 | struct bfd_link_info *info, |
| 4709 | bfd *input_bfd, |
| 4710 | asection *input_section, |
| 4711 | bfd_byte *contents, |
| 4712 | Elf_Internal_Rela *relocs, |
| 4713 | Elf_Internal_Sym *local_syms, |
| 4714 | asection **local_sections) |
| 4715 | { |
| 4716 | Elf_Internal_Shdr *symtab_hdr; |
| 4717 | struct elf_link_hash_entry **sym_hashes; |
| 4718 | struct ppc_elf_link_hash_table *htab; |
| 4719 | Elf_Internal_Rela *rel; |
| 4720 | Elf_Internal_Rela *relend; |
| 4721 | Elf_Internal_Rela outrel; |
| 4722 | bfd_byte *loc; |
| 4723 | asection *sreloc = NULL; |
| 4724 | bfd_vma *local_got_offsets; |
| 4725 | bfd_boolean ret = TRUE; |
| 4726 | |
| 4727 | #ifdef DEBUG |
| 4728 | _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, " |
| 4729 | "%ld relocations%s", |
| 4730 | input_bfd, input_section, |
| 4731 | (long) input_section->reloc_count, |
| 4732 | (info->relocatable) ? " (relocatable)" : ""); |
| 4733 | #endif |
| 4734 | |
| 4735 | if (info->relocatable) |
| 4736 | return TRUE; |
| 4737 | |
| 4738 | /* Initialize howto table if not already done. */ |
| 4739 | if (!ppc_elf_howto_table[R_PPC_ADDR32]) |
| 4740 | ppc_elf_howto_init (); |
| 4741 | |
| 4742 | htab = ppc_elf_hash_table (info); |
| 4743 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 4744 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 4745 | sym_hashes = elf_sym_hashes (input_bfd); |
| 4746 | rel = relocs; |
| 4747 | relend = relocs + input_section->reloc_count; |
| 4748 | for (; rel < relend; rel++) |
| 4749 | { |
| 4750 | enum elf_ppc_reloc_type r_type; |
| 4751 | bfd_vma addend; |
| 4752 | bfd_reloc_status_type r; |
| 4753 | Elf_Internal_Sym *sym; |
| 4754 | asection *sec; |
| 4755 | struct elf_link_hash_entry *h; |
| 4756 | const char *sym_name; |
| 4757 | reloc_howto_type *howto; |
| 4758 | unsigned long r_symndx; |
| 4759 | bfd_vma relocation; |
| 4760 | bfd_vma branch_bit, insn, from; |
| 4761 | bfd_boolean unresolved_reloc; |
| 4762 | bfd_boolean warned; |
| 4763 | unsigned int tls_type, tls_mask, tls_gd; |
| 4764 | |
| 4765 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4766 | sym = NULL; |
| 4767 | sec = NULL; |
| 4768 | h = NULL; |
| 4769 | unresolved_reloc = FALSE; |
| 4770 | warned = FALSE; |
| 4771 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4772 | |
| 4773 | if (r_symndx < symtab_hdr->sh_info) |
| 4774 | { |
| 4775 | sym = local_syms + r_symndx; |
| 4776 | sec = local_sections[r_symndx]; |
| 4777 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
| 4778 | |
| 4779 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 4780 | } |
| 4781 | else |
| 4782 | { |
| 4783 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 4784 | r_symndx, symtab_hdr, sym_hashes, |
| 4785 | h, sec, relocation, |
| 4786 | unresolved_reloc, warned); |
| 4787 | |
| 4788 | sym_name = h->root.root.string; |
| 4789 | } |
| 4790 | |
| 4791 | /* TLS optimizations. Replace instruction sequences and relocs |
| 4792 | based on information we collected in tls_optimize. We edit |
| 4793 | RELOCS so that --emit-relocs will output something sensible |
| 4794 | for the final instruction stream. */ |
| 4795 | tls_mask = 0; |
| 4796 | tls_gd = 0; |
| 4797 | if (IS_PPC_TLS_RELOC (r_type)) |
| 4798 | { |
| 4799 | if (h != NULL) |
| 4800 | tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask; |
| 4801 | else if (local_got_offsets != NULL) |
| 4802 | { |
| 4803 | char *lgot_masks; |
| 4804 | lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info); |
| 4805 | tls_mask = lgot_masks[r_symndx]; |
| 4806 | } |
| 4807 | } |
| 4808 | |
| 4809 | /* Ensure reloc mapping code below stays sane. */ |
| 4810 | if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3) |
| 4811 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3) |
| 4812 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3) |
| 4813 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3) |
| 4814 | || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3) |
| 4815 | || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3) |
| 4816 | || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3) |
| 4817 | || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3)) |
| 4818 | abort (); |
| 4819 | switch (r_type) |
| 4820 | { |
| 4821 | default: |
| 4822 | break; |
| 4823 | |
| 4824 | case R_PPC_GOT_TPREL16: |
| 4825 | case R_PPC_GOT_TPREL16_LO: |
| 4826 | if (tls_mask != 0 |
| 4827 | && (tls_mask & TLS_TPREL) == 0) |
| 4828 | { |
| 4829 | bfd_vma insn; |
| 4830 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2); |
| 4831 | insn &= 31 << 21; |
| 4832 | insn |= 0x3c020000; /* addis 0,2,0 */ |
| 4833 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2); |
| 4834 | r_type = R_PPC_TPREL16_HA; |
| 4835 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 4836 | } |
| 4837 | break; |
| 4838 | |
| 4839 | case R_PPC_TLS: |
| 4840 | if (tls_mask != 0 |
| 4841 | && (tls_mask & TLS_TPREL) == 0) |
| 4842 | { |
| 4843 | bfd_vma insn, rtra; |
| 4844 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 4845 | if ((insn & ((31 << 26) | (31 << 11))) |
| 4846 | == ((31 << 26) | (2 << 11))) |
| 4847 | rtra = insn & ((1 << 26) - (1 << 16)); |
| 4848 | else if ((insn & ((31 << 26) | (31 << 16))) |
| 4849 | == ((31 << 26) | (2 << 16))) |
| 4850 | rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5); |
| 4851 | else |
| 4852 | abort (); |
| 4853 | if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1) |
| 4854 | /* add -> addi. */ |
| 4855 | insn = 14 << 26; |
| 4856 | else if ((insn & (31 << 1)) == 23 << 1 |
| 4857 | && ((insn & (31 << 6)) < 14 << 6 |
| 4858 | || ((insn & (31 << 6)) >= 16 << 6 |
| 4859 | && (insn & (31 << 6)) < 24 << 6))) |
| 4860 | /* load and store indexed -> dform. */ |
| 4861 | insn = (32 | ((insn >> 6) & 31)) << 26; |
| 4862 | else if ((insn & (31 << 1)) == 21 << 1 |
| 4863 | && (insn & (0x1a << 6)) == 0) |
| 4864 | /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ |
| 4865 | insn = (((58 | ((insn >> 6) & 4)) << 26) |
| 4866 | | ((insn >> 6) & 1)); |
| 4867 | else if ((insn & (31 << 1)) == 21 << 1 |
| 4868 | && (insn & ((1 << 11) - (1 << 1))) == 341 << 1) |
| 4869 | /* lwax -> lwa. */ |
| 4870 | insn = (58 << 26) | 2; |
| 4871 | else |
| 4872 | abort (); |
| 4873 | insn |= rtra; |
| 4874 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 4875 | r_type = R_PPC_TPREL16_LO; |
| 4876 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 4877 | /* Was PPC_TLS which sits on insn boundary, now |
| 4878 | PPC_TPREL16_LO which is at insn+2. */ |
| 4879 | rel->r_offset += 2; |
| 4880 | } |
| 4881 | break; |
| 4882 | |
| 4883 | case R_PPC_GOT_TLSGD16_HI: |
| 4884 | case R_PPC_GOT_TLSGD16_HA: |
| 4885 | tls_gd = TLS_TPRELGD; |
| 4886 | if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) |
| 4887 | goto tls_gdld_hi; |
| 4888 | break; |
| 4889 | |
| 4890 | case R_PPC_GOT_TLSLD16_HI: |
| 4891 | case R_PPC_GOT_TLSLD16_HA: |
| 4892 | if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) |
| 4893 | { |
| 4894 | tls_gdld_hi: |
| 4895 | if ((tls_mask & tls_gd) != 0) |
| 4896 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
| 4897 | + R_PPC_GOT_TPREL16); |
| 4898 | else |
| 4899 | { |
| 4900 | bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); |
| 4901 | rel->r_offset -= 2; |
| 4902 | r_type = R_PPC_NONE; |
| 4903 | } |
| 4904 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 4905 | } |
| 4906 | break; |
| 4907 | |
| 4908 | case R_PPC_GOT_TLSGD16: |
| 4909 | case R_PPC_GOT_TLSGD16_LO: |
| 4910 | tls_gd = TLS_TPRELGD; |
| 4911 | if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) |
| 4912 | goto tls_get_addr_check; |
| 4913 | break; |
| 4914 | |
| 4915 | case R_PPC_GOT_TLSLD16: |
| 4916 | case R_PPC_GOT_TLSLD16_LO: |
| 4917 | if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) |
| 4918 | { |
| 4919 | tls_get_addr_check: |
| 4920 | if (rel + 1 < relend) |
| 4921 | { |
| 4922 | enum elf_ppc_reloc_type r_type2; |
| 4923 | unsigned long r_symndx2; |
| 4924 | struct elf_link_hash_entry *h2; |
| 4925 | bfd_vma insn1, insn2; |
| 4926 | bfd_vma offset; |
| 4927 | |
| 4928 | /* The next instruction should be a call to |
| 4929 | __tls_get_addr. Peek at the reloc to be sure. */ |
| 4930 | r_type2 = ELF32_R_TYPE (rel[1].r_info); |
| 4931 | r_symndx2 = ELF32_R_SYM (rel[1].r_info); |
| 4932 | if (r_symndx2 < symtab_hdr->sh_info |
| 4933 | || (r_type2 != R_PPC_REL14 |
| 4934 | && r_type2 != R_PPC_REL14_BRTAKEN |
| 4935 | && r_type2 != R_PPC_REL14_BRNTAKEN |
| 4936 | && r_type2 != R_PPC_REL24 |
| 4937 | && r_type2 != R_PPC_PLTREL24)) |
| 4938 | break; |
| 4939 | |
| 4940 | h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info]; |
| 4941 | while (h2->root.type == bfd_link_hash_indirect |
| 4942 | || h2->root.type == bfd_link_hash_warning) |
| 4943 | h2 = (struct elf_link_hash_entry *) h2->root.u.i.link; |
| 4944 | if (h2 == NULL || h2 != htab->tls_get_addr) |
| 4945 | break; |
| 4946 | |
| 4947 | /* OK, it checks out. Replace the call. */ |
| 4948 | offset = rel[1].r_offset; |
| 4949 | insn1 = bfd_get_32 (output_bfd, |
| 4950 | contents + rel->r_offset - 2); |
| 4951 | if ((tls_mask & tls_gd) != 0) |
| 4952 | { |
| 4953 | /* IE */ |
| 4954 | insn1 &= (1 << 26) - 1; |
| 4955 | insn1 |= 32 << 26; /* lwz */ |
| 4956 | insn2 = 0x7c631214; /* add 3,3,2 */ |
| 4957 | rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE); |
| 4958 | r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3) |
| 4959 | + R_PPC_GOT_TPREL16); |
| 4960 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 4961 | } |
| 4962 | else |
| 4963 | { |
| 4964 | /* LE */ |
| 4965 | insn1 = 0x3c620000; /* addis 3,2,0 */ |
| 4966 | insn2 = 0x38630000; /* addi 3,3,0 */ |
| 4967 | if (tls_gd == 0) |
| 4968 | { |
| 4969 | /* Was an LD reloc. */ |
| 4970 | r_symndx = 0; |
| 4971 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 4972 | rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
| 4973 | } |
| 4974 | r_type = R_PPC_TPREL16_HA; |
| 4975 | rel->r_info = ELF32_R_INFO (r_symndx, r_type); |
| 4976 | rel[1].r_info = ELF32_R_INFO (r_symndx, |
| 4977 | R_PPC_TPREL16_LO); |
| 4978 | rel[1].r_offset += 2; |
| 4979 | } |
| 4980 | bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2); |
| 4981 | bfd_put_32 (output_bfd, insn2, contents + offset); |
| 4982 | if (tls_gd == 0) |
| 4983 | { |
| 4984 | /* We changed the symbol on an LD reloc. Start over |
| 4985 | in order to get h, sym, sec etc. right. */ |
| 4986 | rel--; |
| 4987 | continue; |
| 4988 | } |
| 4989 | } |
| 4990 | } |
| 4991 | break; |
| 4992 | } |
| 4993 | |
| 4994 | /* Handle other relocations that tweak non-addend part of insn. */ |
| 4995 | branch_bit = 0; |
| 4996 | switch (r_type) |
| 4997 | { |
| 4998 | default: |
| 4999 | break; |
| 5000 | |
| 5001 | /* Branch taken prediction relocations. */ |
| 5002 | case R_PPC_ADDR14_BRTAKEN: |
| 5003 | case R_PPC_REL14_BRTAKEN: |
| 5004 | branch_bit = BRANCH_PREDICT_BIT; |
| 5005 | /* Fall thru */ |
| 5006 | |
| 5007 | /* Branch not taken prediction relocations. */ |
| 5008 | case R_PPC_ADDR14_BRNTAKEN: |
| 5009 | case R_PPC_REL14_BRNTAKEN: |
| 5010 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 5011 | insn &= ~BRANCH_PREDICT_BIT; |
| 5012 | insn |= branch_bit; |
| 5013 | |
| 5014 | from = (rel->r_offset |
| 5015 | + input_section->output_offset |
| 5016 | + input_section->output_section->vma); |
| 5017 | |
| 5018 | /* Invert 'y' bit if not the default. */ |
| 5019 | if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) |
| 5020 | insn ^= BRANCH_PREDICT_BIT; |
| 5021 | |
| 5022 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 5023 | break; |
| 5024 | } |
| 5025 | |
| 5026 | addend = rel->r_addend; |
| 5027 | tls_type = 0; |
| 5028 | howto = NULL; |
| 5029 | if (r_type < R_PPC_max) |
| 5030 | howto = ppc_elf_howto_table[r_type]; |
| 5031 | switch (r_type) |
| 5032 | { |
| 5033 | default: |
| 5034 | (*_bfd_error_handler) |
| 5035 | (_("%B: unknown relocation type %d for symbol %s"), |
| 5036 | input_bfd, (int) r_type, sym_name); |
| 5037 | |
| 5038 | bfd_set_error (bfd_error_bad_value); |
| 5039 | ret = FALSE; |
| 5040 | continue; |
| 5041 | |
| 5042 | case R_PPC_NONE: |
| 5043 | case R_PPC_TLS: |
| 5044 | case R_PPC_EMB_MRKREF: |
| 5045 | case R_PPC_GNU_VTINHERIT: |
| 5046 | case R_PPC_GNU_VTENTRY: |
| 5047 | continue; |
| 5048 | |
| 5049 | /* GOT16 relocations. Like an ADDR16 using the symbol's |
| 5050 | address in the GOT as relocation value instead of the |
| 5051 | symbol's value itself. Also, create a GOT entry for the |
| 5052 | symbol and put the symbol value there. */ |
| 5053 | case R_PPC_GOT_TLSGD16: |
| 5054 | case R_PPC_GOT_TLSGD16_LO: |
| 5055 | case R_PPC_GOT_TLSGD16_HI: |
| 5056 | case R_PPC_GOT_TLSGD16_HA: |
| 5057 | tls_type = TLS_TLS | TLS_GD; |
| 5058 | goto dogot; |
| 5059 | |
| 5060 | case R_PPC_GOT_TLSLD16: |
| 5061 | case R_PPC_GOT_TLSLD16_LO: |
| 5062 | case R_PPC_GOT_TLSLD16_HI: |
| 5063 | case R_PPC_GOT_TLSLD16_HA: |
| 5064 | tls_type = TLS_TLS | TLS_LD; |
| 5065 | goto dogot; |
| 5066 | |
| 5067 | case R_PPC_GOT_TPREL16: |
| 5068 | case R_PPC_GOT_TPREL16_LO: |
| 5069 | case R_PPC_GOT_TPREL16_HI: |
| 5070 | case R_PPC_GOT_TPREL16_HA: |
| 5071 | tls_type = TLS_TLS | TLS_TPREL; |
| 5072 | goto dogot; |
| 5073 | |
| 5074 | case R_PPC_GOT_DTPREL16: |
| 5075 | case R_PPC_GOT_DTPREL16_LO: |
| 5076 | case R_PPC_GOT_DTPREL16_HI: |
| 5077 | case R_PPC_GOT_DTPREL16_HA: |
| 5078 | tls_type = TLS_TLS | TLS_DTPREL; |
| 5079 | goto dogot; |
| 5080 | |
| 5081 | case R_PPC_GOT16: |
| 5082 | case R_PPC_GOT16_LO: |
| 5083 | case R_PPC_GOT16_HI: |
| 5084 | case R_PPC_GOT16_HA: |
| 5085 | dogot: |
| 5086 | { |
| 5087 | /* Relocation is to the entry for this symbol in the global |
| 5088 | offset table. */ |
| 5089 | bfd_vma off; |
| 5090 | bfd_vma *offp; |
| 5091 | unsigned long indx; |
| 5092 | |
| 5093 | if (htab->got == NULL) |
| 5094 | abort (); |
| 5095 | |
| 5096 | indx = 0; |
| 5097 | if (tls_type == (TLS_TLS | TLS_LD) |
| 5098 | && (h == NULL |
| 5099 | || !h->def_dynamic)) |
| 5100 | offp = &htab->tlsld_got.offset; |
| 5101 | else if (h != NULL) |
| 5102 | { |
| 5103 | bfd_boolean dyn; |
| 5104 | dyn = htab->elf.dynamic_sections_created; |
| 5105 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 5106 | || (info->shared |
| 5107 | && SYMBOL_REFERENCES_LOCAL (info, h))) |
| 5108 | /* This is actually a static link, or it is a |
| 5109 | -Bsymbolic link and the symbol is defined |
| 5110 | locally, or the symbol was forced to be local |
| 5111 | because of a version file. */ |
| 5112 | ; |
| 5113 | else |
| 5114 | { |
| 5115 | indx = h->dynindx; |
| 5116 | unresolved_reloc = FALSE; |
| 5117 | } |
| 5118 | offp = &h->got.offset; |
| 5119 | } |
| 5120 | else |
| 5121 | { |
| 5122 | if (local_got_offsets == NULL) |
| 5123 | abort (); |
| 5124 | offp = &local_got_offsets[r_symndx]; |
| 5125 | } |
| 5126 | |
| 5127 | /* The offset must always be a multiple of 4. We use the |
| 5128 | least significant bit to record whether we have already |
| 5129 | processed this entry. */ |
| 5130 | off = *offp; |
| 5131 | if ((off & 1) != 0) |
| 5132 | off &= ~1; |
| 5133 | else |
| 5134 | { |
| 5135 | unsigned int tls_m = (tls_mask |
| 5136 | & (TLS_LD | TLS_GD | TLS_DTPREL |
| 5137 | | TLS_TPREL | TLS_TPRELGD)); |
| 5138 | |
| 5139 | if (offp == &htab->tlsld_got.offset) |
| 5140 | tls_m = TLS_LD; |
| 5141 | else if (h == NULL |
| 5142 | || !h->def_dynamic) |
| 5143 | tls_m &= ~TLS_LD; |
| 5144 | |
| 5145 | /* We might have multiple got entries for this sym. |
| 5146 | Initialize them all. */ |
| 5147 | do |
| 5148 | { |
| 5149 | int tls_ty = 0; |
| 5150 | |
| 5151 | if ((tls_m & TLS_LD) != 0) |
| 5152 | { |
| 5153 | tls_ty = TLS_TLS | TLS_LD; |
| 5154 | tls_m &= ~TLS_LD; |
| 5155 | } |
| 5156 | else if ((tls_m & TLS_GD) != 0) |
| 5157 | { |
| 5158 | tls_ty = TLS_TLS | TLS_GD; |
| 5159 | tls_m &= ~TLS_GD; |
| 5160 | } |
| 5161 | else if ((tls_m & TLS_DTPREL) != 0) |
| 5162 | { |
| 5163 | tls_ty = TLS_TLS | TLS_DTPREL; |
| 5164 | tls_m &= ~TLS_DTPREL; |
| 5165 | } |
| 5166 | else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0) |
| 5167 | { |
| 5168 | tls_ty = TLS_TLS | TLS_TPREL; |
| 5169 | tls_m = 0; |
| 5170 | } |
| 5171 | |
| 5172 | /* Generate relocs for the dynamic linker. */ |
| 5173 | if ((info->shared || indx != 0) |
| 5174 | && (h == NULL |
| 5175 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 5176 | || h->root.type != bfd_link_hash_undefweak)) |
| 5177 | { |
| 5178 | outrel.r_offset = (htab->got->output_section->vma |
| 5179 | + htab->got->output_offset |
| 5180 | + off); |
| 5181 | outrel.r_addend = 0; |
| 5182 | if (tls_ty & (TLS_LD | TLS_GD)) |
| 5183 | { |
| 5184 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32); |
| 5185 | if (tls_ty == (TLS_TLS | TLS_GD)) |
| 5186 | { |
| 5187 | loc = htab->relgot->contents; |
| 5188 | loc += (htab->relgot->reloc_count++ |
| 5189 | * sizeof (Elf32_External_Rela)); |
| 5190 | bfd_elf32_swap_reloca_out (output_bfd, |
| 5191 | &outrel, loc); |
| 5192 | outrel.r_offset += 4; |
| 5193 | outrel.r_info |
| 5194 | = ELF32_R_INFO (indx, R_PPC_DTPREL32); |
| 5195 | } |
| 5196 | } |
| 5197 | else if (tls_ty == (TLS_TLS | TLS_DTPREL)) |
| 5198 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32); |
| 5199 | else if (tls_ty == (TLS_TLS | TLS_TPREL)) |
| 5200 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32); |
| 5201 | else if (indx == 0) |
| 5202 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE); |
| 5203 | else |
| 5204 | outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT); |
| 5205 | if (indx == 0) |
| 5206 | { |
| 5207 | outrel.r_addend += relocation; |
| 5208 | if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL)) |
| 5209 | outrel.r_addend -= htab->elf.tls_sec->vma; |
| 5210 | } |
| 5211 | loc = htab->relgot->contents; |
| 5212 | loc += (htab->relgot->reloc_count++ |
| 5213 | * sizeof (Elf32_External_Rela)); |
| 5214 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 5215 | } |
| 5216 | |
| 5217 | /* Init the .got section contents if we're not |
| 5218 | emitting a reloc. */ |
| 5219 | else |
| 5220 | { |
| 5221 | bfd_vma value = relocation; |
| 5222 | |
| 5223 | if (tls_ty == (TLS_TLS | TLS_LD)) |
| 5224 | value = 1; |
| 5225 | else if (tls_ty != 0) |
| 5226 | { |
| 5227 | value -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 5228 | if (tls_ty == (TLS_TLS | TLS_TPREL)) |
| 5229 | value += DTP_OFFSET - TP_OFFSET; |
| 5230 | |
| 5231 | if (tls_ty == (TLS_TLS | TLS_GD)) |
| 5232 | { |
| 5233 | bfd_put_32 (output_bfd, value, |
| 5234 | htab->got->contents + off + 4); |
| 5235 | value = 1; |
| 5236 | } |
| 5237 | } |
| 5238 | bfd_put_32 (output_bfd, value, |
| 5239 | htab->got->contents + off); |
| 5240 | } |
| 5241 | |
| 5242 | off += 4; |
| 5243 | if (tls_ty & (TLS_LD | TLS_GD)) |
| 5244 | off += 4; |
| 5245 | } |
| 5246 | while (tls_m != 0); |
| 5247 | |
| 5248 | off = *offp; |
| 5249 | *offp = off | 1; |
| 5250 | } |
| 5251 | |
| 5252 | if (off >= (bfd_vma) -2) |
| 5253 | abort (); |
| 5254 | |
| 5255 | if ((tls_type & TLS_TLS) != 0) |
| 5256 | { |
| 5257 | if (tls_type != (TLS_TLS | TLS_LD)) |
| 5258 | { |
| 5259 | if ((tls_mask & TLS_LD) != 0 |
| 5260 | && !(h == NULL |
| 5261 | || !h->def_dynamic)) |
| 5262 | off += 8; |
| 5263 | if (tls_type != (TLS_TLS | TLS_GD)) |
| 5264 | { |
| 5265 | if ((tls_mask & TLS_GD) != 0) |
| 5266 | off += 8; |
| 5267 | if (tls_type != (TLS_TLS | TLS_DTPREL)) |
| 5268 | { |
| 5269 | if ((tls_mask & TLS_DTPREL) != 0) |
| 5270 | off += 4; |
| 5271 | } |
| 5272 | } |
| 5273 | } |
| 5274 | } |
| 5275 | |
| 5276 | relocation = htab->got->output_offset + off - 4; |
| 5277 | |
| 5278 | /* Addends on got relocations don't make much sense. |
| 5279 | x+off@got is actually x@got+off, and since the got is |
| 5280 | generated by a hash table traversal, the value in the |
| 5281 | got at entry m+n bears little relation to the entry m. */ |
| 5282 | if (addend != 0) |
| 5283 | (*_bfd_error_handler) |
| 5284 | (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"), |
| 5285 | input_bfd, |
| 5286 | input_section, |
| 5287 | (long) rel->r_offset, |
| 5288 | howto->name, |
| 5289 | sym_name); |
| 5290 | } |
| 5291 | break; |
| 5292 | |
| 5293 | /* Relocations that need no special processing. */ |
| 5294 | case R_PPC_LOCAL24PC: |
| 5295 | /* It makes no sense to point a local relocation |
| 5296 | at a symbol not in this object. */ |
| 5297 | if (unresolved_reloc) |
| 5298 | { |
| 5299 | if (! (*info->callbacks->undefined_symbol) (info, |
| 5300 | h->root.root.string, |
| 5301 | input_bfd, |
| 5302 | input_section, |
| 5303 | rel->r_offset, |
| 5304 | TRUE)) |
| 5305 | return FALSE; |
| 5306 | continue; |
| 5307 | } |
| 5308 | break; |
| 5309 | |
| 5310 | case R_PPC_DTPREL16: |
| 5311 | case R_PPC_DTPREL16_LO: |
| 5312 | case R_PPC_DTPREL16_HI: |
| 5313 | case R_PPC_DTPREL16_HA: |
| 5314 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 5315 | break; |
| 5316 | |
| 5317 | /* Relocations that may need to be propagated if this is a shared |
| 5318 | object. */ |
| 5319 | case R_PPC_TPREL16: |
| 5320 | case R_PPC_TPREL16_LO: |
| 5321 | case R_PPC_TPREL16_HI: |
| 5322 | case R_PPC_TPREL16_HA: |
| 5323 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 5324 | /* The TPREL16 relocs shouldn't really be used in shared |
| 5325 | libs as they will result in DT_TEXTREL being set, but |
| 5326 | support them anyway. */ |
| 5327 | goto dodyn; |
| 5328 | |
| 5329 | case R_PPC_TPREL32: |
| 5330 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
| 5331 | goto dodyn; |
| 5332 | |
| 5333 | case R_PPC_DTPREL32: |
| 5334 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
| 5335 | goto dodyn; |
| 5336 | |
| 5337 | case R_PPC_DTPMOD32: |
| 5338 | relocation = 1; |
| 5339 | addend = 0; |
| 5340 | goto dodyn; |
| 5341 | |
| 5342 | case R_PPC_REL24: |
| 5343 | case R_PPC_REL32: |
| 5344 | case R_PPC_REL14: |
| 5345 | case R_PPC_REL14_BRTAKEN: |
| 5346 | case R_PPC_REL14_BRNTAKEN: |
| 5347 | /* If these relocations are not to a named symbol, they can be |
| 5348 | handled right here, no need to bother the dynamic linker. */ |
| 5349 | if (SYMBOL_REFERENCES_LOCAL (info, h) |
| 5350 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 5351 | break; |
| 5352 | /* fall through */ |
| 5353 | |
| 5354 | /* Relocations that always need to be propagated if this is a shared |
| 5355 | object. */ |
| 5356 | case R_PPC_ADDR32: |
| 5357 | case R_PPC_ADDR24: |
| 5358 | case R_PPC_ADDR16: |
| 5359 | case R_PPC_ADDR16_LO: |
| 5360 | case R_PPC_ADDR16_HI: |
| 5361 | case R_PPC_ADDR16_HA: |
| 5362 | case R_PPC_ADDR14: |
| 5363 | case R_PPC_ADDR14_BRTAKEN: |
| 5364 | case R_PPC_ADDR14_BRNTAKEN: |
| 5365 | case R_PPC_UADDR32: |
| 5366 | case R_PPC_UADDR16: |
| 5367 | /* r_symndx will be zero only for relocs against symbols |
| 5368 | from removed linkonce sections, or sections discarded by |
| 5369 | a linker script. */ |
| 5370 | dodyn: |
| 5371 | if (r_symndx == 0) |
| 5372 | break; |
| 5373 | /* Fall thru. */ |
| 5374 | |
| 5375 | if ((input_section->flags & SEC_ALLOC) == 0) |
| 5376 | break; |
| 5377 | /* Fall thru. */ |
| 5378 | |
| 5379 | if ((info->shared |
| 5380 | && (h == NULL |
| 5381 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 5382 | || h->root.type != bfd_link_hash_undefweak) |
| 5383 | && (MUST_BE_DYN_RELOC (r_type) |
| 5384 | || !SYMBOL_CALLS_LOCAL (info, h))) |
| 5385 | || (ELIMINATE_COPY_RELOCS |
| 5386 | && !info->shared |
| 5387 | && h != NULL |
| 5388 | && h->dynindx != -1 |
| 5389 | && !h->non_got_ref |
| 5390 | && h->def_dynamic |
| 5391 | && !h->def_regular)) |
| 5392 | { |
| 5393 | int skip; |
| 5394 | |
| 5395 | #ifdef DEBUG |
| 5396 | fprintf (stderr, "ppc_elf_relocate_section needs to " |
| 5397 | "create relocation for %s\n", |
| 5398 | (h && h->root.root.string |
| 5399 | ? h->root.root.string : "<unknown>")); |
| 5400 | #endif |
| 5401 | |
| 5402 | /* When generating a shared object, these relocations |
| 5403 | are copied into the output file to be resolved at run |
| 5404 | time. */ |
| 5405 | if (sreloc == NULL) |
| 5406 | { |
| 5407 | const char *name; |
| 5408 | |
| 5409 | name = (bfd_elf_string_from_elf_section |
| 5410 | (input_bfd, |
| 5411 | elf_elfheader (input_bfd)->e_shstrndx, |
| 5412 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 5413 | if (name == NULL) |
| 5414 | return FALSE; |
| 5415 | |
| 5416 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 5417 | && strcmp (bfd_get_section_name (input_bfd, |
| 5418 | input_section), |
| 5419 | name + 5) == 0); |
| 5420 | |
| 5421 | sreloc = bfd_get_section_by_name (htab->elf.dynobj, name); |
| 5422 | BFD_ASSERT (sreloc != NULL); |
| 5423 | } |
| 5424 | |
| 5425 | skip = 0; |
| 5426 | |
| 5427 | outrel.r_offset = |
| 5428 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 5429 | rel->r_offset); |
| 5430 | if (outrel.r_offset == (bfd_vma) -1 |
| 5431 | || outrel.r_offset == (bfd_vma) -2) |
| 5432 | skip = (int) outrel.r_offset; |
| 5433 | outrel.r_offset += (input_section->output_section->vma |
| 5434 | + input_section->output_offset); |
| 5435 | |
| 5436 | if (skip) |
| 5437 | memset (&outrel, 0, sizeof outrel); |
| 5438 | else if (!SYMBOL_REFERENCES_LOCAL (info, h)) |
| 5439 | { |
| 5440 | unresolved_reloc = FALSE; |
| 5441 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 5442 | outrel.r_addend = rel->r_addend; |
| 5443 | } |
| 5444 | else |
| 5445 | { |
| 5446 | outrel.r_addend = relocation + rel->r_addend; |
| 5447 | |
| 5448 | if (r_type == R_PPC_ADDR32) |
| 5449 | outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE); |
| 5450 | else |
| 5451 | { |
| 5452 | long indx; |
| 5453 | |
| 5454 | if (bfd_is_abs_section (sec)) |
| 5455 | indx = 0; |
| 5456 | else if (sec == NULL || sec->owner == NULL) |
| 5457 | { |
| 5458 | bfd_set_error (bfd_error_bad_value); |
| 5459 | return FALSE; |
| 5460 | } |
| 5461 | else |
| 5462 | { |
| 5463 | asection *osec; |
| 5464 | |
| 5465 | /* We are turning this relocation into one |
| 5466 | against a section symbol. It would be |
| 5467 | proper to subtract the symbol's value, |
| 5468 | osec->vma, from the emitted reloc addend, |
| 5469 | but ld.so expects buggy relocs. */ |
| 5470 | osec = sec->output_section; |
| 5471 | indx = elf_section_data (osec)->dynindx; |
| 5472 | BFD_ASSERT (indx > 0); |
| 5473 | #ifdef DEBUG |
| 5474 | if (indx <= 0) |
| 5475 | printf ("indx=%d section=%s flags=%08x name=%s\n", |
| 5476 | indx, osec->name, osec->flags, |
| 5477 | h->root.root.string); |
| 5478 | #endif |
| 5479 | } |
| 5480 | |
| 5481 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 5482 | } |
| 5483 | } |
| 5484 | |
| 5485 | loc = sreloc->contents; |
| 5486 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 5487 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 5488 | |
| 5489 | if (skip == -1) |
| 5490 | continue; |
| 5491 | |
| 5492 | /* This reloc will be computed at runtime. We clear the memory |
| 5493 | so that it contains predictable value. */ |
| 5494 | if (! skip |
| 5495 | && ((input_section->flags & SEC_ALLOC) != 0 |
| 5496 | || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)) |
| 5497 | { |
| 5498 | relocation = howto->pc_relative ? outrel.r_offset : 0; |
| 5499 | addend = 0; |
| 5500 | break; |
| 5501 | } |
| 5502 | } |
| 5503 | break; |
| 5504 | |
| 5505 | case R_PPC_RELAX32PC_PLT: |
| 5506 | case R_PPC_RELAX32_PLT: |
| 5507 | BFD_ASSERT (h != NULL |
| 5508 | && h->plt.offset != (bfd_vma) -1 |
| 5509 | && htab->plt != NULL); |
| 5510 | |
| 5511 | relocation = (htab->plt->output_section->vma |
| 5512 | + htab->plt->output_offset |
| 5513 | + h->plt.offset); |
| 5514 | if (r_type == R_PPC_RELAX32_PLT) |
| 5515 | goto relax32; |
| 5516 | /* Fall thru */ |
| 5517 | |
| 5518 | case R_PPC_RELAX32PC: |
| 5519 | relocation -= (input_section->output_section->vma |
| 5520 | + input_section->output_offset |
| 5521 | + rel->r_offset - 4); |
| 5522 | /* Fall thru */ |
| 5523 | |
| 5524 | case R_PPC_RELAX32: |
| 5525 | relax32: |
| 5526 | { |
| 5527 | unsigned long t0; |
| 5528 | unsigned long t1; |
| 5529 | |
| 5530 | t0 = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 5531 | t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4); |
| 5532 | |
| 5533 | /* We're clearing the bits for R_PPC_ADDR16_HA |
| 5534 | and R_PPC_ADDR16_LO here. */ |
| 5535 | t0 &= ~0xffff; |
| 5536 | t1 &= ~0xffff; |
| 5537 | |
| 5538 | /* t0 is HA, t1 is LO */ |
| 5539 | relocation += addend; |
| 5540 | t0 |= ((relocation + 0x8000) >> 16) & 0xffff; |
| 5541 | t1 |= relocation & 0xffff; |
| 5542 | |
| 5543 | bfd_put_32 (output_bfd, t0, contents + rel->r_offset); |
| 5544 | bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4); |
| 5545 | } |
| 5546 | continue; |
| 5547 | |
| 5548 | /* Indirect .sdata relocation. */ |
| 5549 | case R_PPC_EMB_SDAI16: |
| 5550 | BFD_ASSERT (htab->sdata[0].section != NULL); |
| 5551 | relocation |
| 5552 | = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0], |
| 5553 | h, relocation, rel); |
| 5554 | break; |
| 5555 | |
| 5556 | /* Indirect .sdata2 relocation. */ |
| 5557 | case R_PPC_EMB_SDA2I16: |
| 5558 | BFD_ASSERT (htab->sdata[1].section != NULL); |
| 5559 | relocation |
| 5560 | = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1], |
| 5561 | h, relocation, rel); |
| 5562 | break; |
| 5563 | |
| 5564 | /* Handle the TOC16 reloc. We want to use the offset within the .got |
| 5565 | section, not the actual VMA. This is appropriate when generating |
| 5566 | an embedded ELF object, for which the .got section acts like the |
| 5567 | AIX .toc section. */ |
| 5568 | case R_PPC_TOC16: /* phony GOT16 relocations */ |
| 5569 | BFD_ASSERT (sec != NULL); |
| 5570 | BFD_ASSERT (bfd_is_und_section (sec) |
| 5571 | || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0 |
| 5572 | || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0); |
| 5573 | |
| 5574 | addend -= sec->output_section->vma + sec->output_offset + 0x8000; |
| 5575 | break; |
| 5576 | |
| 5577 | case R_PPC_PLTREL24: |
| 5578 | /* Relocation is to the entry for this symbol in the |
| 5579 | procedure linkage table. */ |
| 5580 | BFD_ASSERT (h != NULL); |
| 5581 | |
| 5582 | if (h->plt.offset == (bfd_vma) -1 |
| 5583 | || htab->plt == NULL) |
| 5584 | { |
| 5585 | /* We didn't make a PLT entry for this symbol. This |
| 5586 | happens when statically linking PIC code, or when |
| 5587 | using -Bsymbolic. */ |
| 5588 | break; |
| 5589 | } |
| 5590 | |
| 5591 | unresolved_reloc = FALSE; |
| 5592 | relocation = (htab->plt->output_section->vma |
| 5593 | + htab->plt->output_offset |
| 5594 | + h->plt.offset); |
| 5595 | break; |
| 5596 | |
| 5597 | /* Relocate against _SDA_BASE_. */ |
| 5598 | case R_PPC_SDAREL16: |
| 5599 | { |
| 5600 | const char *name; |
| 5601 | |
| 5602 | BFD_ASSERT (sec != NULL); |
| 5603 | name = bfd_get_section_name (abfd, sec->output_section); |
| 5604 | if (! ((strncmp (name, ".sdata", 6) == 0 |
| 5605 | && (name[6] == 0 || name[6] == '.')) |
| 5606 | || (strncmp (name, ".sbss", 5) == 0 |
| 5607 | && (name[5] == 0 || name[5] == '.')))) |
| 5608 | { |
| 5609 | (*_bfd_error_handler) |
| 5610 | (_("%B: the target (%s) of a %s relocation is " |
| 5611 | "in the wrong output section (%s)"), |
| 5612 | input_bfd, |
| 5613 | sym_name, |
| 5614 | howto->name, |
| 5615 | name); |
| 5616 | } |
| 5617 | addend -= htab->sdata[0].sym_val; |
| 5618 | } |
| 5619 | break; |
| 5620 | |
| 5621 | /* Relocate against _SDA2_BASE_. */ |
| 5622 | case R_PPC_EMB_SDA2REL: |
| 5623 | { |
| 5624 | const char *name; |
| 5625 | |
| 5626 | BFD_ASSERT (sec != NULL); |
| 5627 | name = bfd_get_section_name (abfd, sec->output_section); |
| 5628 | if (! (strncmp (name, ".sdata2", 7) == 0 |
| 5629 | || strncmp (name, ".sbss2", 6) == 0)) |
| 5630 | { |
| 5631 | (*_bfd_error_handler) |
| 5632 | (_("%B: the target (%s) of a %s relocation is " |
| 5633 | "in the wrong output section (%s)"), |
| 5634 | input_bfd, |
| 5635 | sym_name, |
| 5636 | howto->name, |
| 5637 | name); |
| 5638 | |
| 5639 | bfd_set_error (bfd_error_bad_value); |
| 5640 | ret = FALSE; |
| 5641 | continue; |
| 5642 | } |
| 5643 | addend -= htab->sdata[1].sym_val; |
| 5644 | } |
| 5645 | break; |
| 5646 | |
| 5647 | /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */ |
| 5648 | case R_PPC_EMB_SDA21: |
| 5649 | case R_PPC_EMB_RELSDA: |
| 5650 | { |
| 5651 | const char *name; |
| 5652 | int reg; |
| 5653 | |
| 5654 | BFD_ASSERT (sec != NULL); |
| 5655 | name = bfd_get_section_name (abfd, sec->output_section); |
| 5656 | if (((strncmp (name, ".sdata", 6) == 0 |
| 5657 | && (name[6] == 0 || name[6] == '.')) |
| 5658 | || (strncmp (name, ".sbss", 5) == 0 |
| 5659 | && (name[5] == 0 || name[5] == '.')))) |
| 5660 | { |
| 5661 | reg = 13; |
| 5662 | addend -= htab->sdata[0].sym_val; |
| 5663 | } |
| 5664 | |
| 5665 | else if (strncmp (name, ".sdata2", 7) == 0 |
| 5666 | || strncmp (name, ".sbss2", 6) == 0) |
| 5667 | { |
| 5668 | reg = 2; |
| 5669 | addend -= htab->sdata[1].sym_val; |
| 5670 | } |
| 5671 | |
| 5672 | else if (strcmp (name, ".PPC.EMB.sdata0") == 0 |
| 5673 | || strcmp (name, ".PPC.EMB.sbss0") == 0) |
| 5674 | { |
| 5675 | reg = 0; |
| 5676 | } |
| 5677 | |
| 5678 | else |
| 5679 | { |
| 5680 | (*_bfd_error_handler) |
| 5681 | (_("%B: the target (%s) of a %s relocation is " |
| 5682 | "in the wrong output section (%s)"), |
| 5683 | input_bfd, |
| 5684 | sym_name, |
| 5685 | howto->name, |
| 5686 | name); |
| 5687 | |
| 5688 | bfd_set_error (bfd_error_bad_value); |
| 5689 | ret = FALSE; |
| 5690 | continue; |
| 5691 | } |
| 5692 | |
| 5693 | if (r_type == R_PPC_EMB_SDA21) |
| 5694 | { /* fill in register field */ |
| 5695 | insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| 5696 | insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT); |
| 5697 | bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| 5698 | } |
| 5699 | } |
| 5700 | break; |
| 5701 | |
| 5702 | /* Relocate against the beginning of the section. */ |
| 5703 | case R_PPC_SECTOFF: |
| 5704 | case R_PPC_SECTOFF_LO: |
| 5705 | case R_PPC_SECTOFF_HI: |
| 5706 | case R_PPC_SECTOFF_HA: |
| 5707 | BFD_ASSERT (sec != NULL); |
| 5708 | addend -= sec->output_section->vma; |
| 5709 | break; |
| 5710 | |
| 5711 | /* Negative relocations. */ |
| 5712 | case R_PPC_EMB_NADDR32: |
| 5713 | case R_PPC_EMB_NADDR16: |
| 5714 | case R_PPC_EMB_NADDR16_LO: |
| 5715 | case R_PPC_EMB_NADDR16_HI: |
| 5716 | case R_PPC_EMB_NADDR16_HA: |
| 5717 | addend -= 2 * relocation; |
| 5718 | break; |
| 5719 | |
| 5720 | case R_PPC_COPY: |
| 5721 | case R_PPC_GLOB_DAT: |
| 5722 | case R_PPC_JMP_SLOT: |
| 5723 | case R_PPC_RELATIVE: |
| 5724 | case R_PPC_PLT32: |
| 5725 | case R_PPC_PLTREL32: |
| 5726 | case R_PPC_PLT16_LO: |
| 5727 | case R_PPC_PLT16_HI: |
| 5728 | case R_PPC_PLT16_HA: |
| 5729 | case R_PPC_ADDR30: |
| 5730 | case R_PPC_EMB_RELSEC16: |
| 5731 | case R_PPC_EMB_RELST_LO: |
| 5732 | case R_PPC_EMB_RELST_HI: |
| 5733 | case R_PPC_EMB_RELST_HA: |
| 5734 | case R_PPC_EMB_BIT_FLD: |
| 5735 | (*_bfd_error_handler) |
| 5736 | (_("%B: relocation %s is not yet supported for symbol %s."), |
| 5737 | input_bfd, |
| 5738 | howto->name, |
| 5739 | sym_name); |
| 5740 | |
| 5741 | bfd_set_error (bfd_error_invalid_operation); |
| 5742 | ret = FALSE; |
| 5743 | continue; |
| 5744 | } |
| 5745 | |
| 5746 | /* Do any further special processing. */ |
| 5747 | switch (r_type) |
| 5748 | { |
| 5749 | default: |
| 5750 | break; |
| 5751 | |
| 5752 | case R_PPC_ADDR16_HA: |
| 5753 | case R_PPC_GOT16_HA: |
| 5754 | case R_PPC_PLT16_HA: |
| 5755 | case R_PPC_SECTOFF_HA: |
| 5756 | case R_PPC_TPREL16_HA: |
| 5757 | case R_PPC_DTPREL16_HA: |
| 5758 | case R_PPC_GOT_TLSGD16_HA: |
| 5759 | case R_PPC_GOT_TLSLD16_HA: |
| 5760 | case R_PPC_GOT_TPREL16_HA: |
| 5761 | case R_PPC_GOT_DTPREL16_HA: |
| 5762 | case R_PPC_EMB_NADDR16_HA: |
| 5763 | case R_PPC_EMB_RELST_HA: |
| 5764 | /* It's just possible that this symbol is a weak symbol |
| 5765 | that's not actually defined anywhere. In that case, |
| 5766 | 'sec' would be NULL, and we should leave the symbol |
| 5767 | alone (it will be set to zero elsewhere in the link). */ |
| 5768 | if (sec != NULL) |
| 5769 | /* Add 0x10000 if sign bit in 0:15 is set. |
| 5770 | Bits 0:15 are not used. */ |
| 5771 | addend += 0x8000; |
| 5772 | break; |
| 5773 | } |
| 5774 | |
| 5775 | #ifdef DEBUG |
| 5776 | fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, " |
| 5777 | "offset = %ld, addend = %ld\n", |
| 5778 | howto->name, |
| 5779 | (int) r_type, |
| 5780 | sym_name, |
| 5781 | r_symndx, |
| 5782 | (long) rel->r_offset, |
| 5783 | (long) addend); |
| 5784 | #endif |
| 5785 | |
| 5786 | if (unresolved_reloc |
| 5787 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 5788 | && h->def_dynamic)) |
| 5789 | { |
| 5790 | (*_bfd_error_handler) |
| 5791 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| 5792 | input_bfd, |
| 5793 | input_section, |
| 5794 | (long) rel->r_offset, |
| 5795 | howto->name, |
| 5796 | sym_name); |
| 5797 | ret = FALSE; |
| 5798 | } |
| 5799 | |
| 5800 | r = _bfd_final_link_relocate (howto, |
| 5801 | input_bfd, |
| 5802 | input_section, |
| 5803 | contents, |
| 5804 | rel->r_offset, |
| 5805 | relocation, |
| 5806 | addend); |
| 5807 | |
| 5808 | if (r != bfd_reloc_ok) |
| 5809 | { |
| 5810 | if (r == bfd_reloc_overflow) |
| 5811 | { |
| 5812 | if (warned) |
| 5813 | continue; |
| 5814 | if (h != NULL |
| 5815 | && h->root.type == bfd_link_hash_undefweak |
| 5816 | && howto->pc_relative) |
| 5817 | { |
| 5818 | /* Assume this is a call protected by other code that |
| 5819 | detect the symbol is undefined. If this is the case, |
| 5820 | we can safely ignore the overflow. If not, the |
| 5821 | program is hosed anyway, and a little warning isn't |
| 5822 | going to help. */ |
| 5823 | |
| 5824 | continue; |
| 5825 | } |
| 5826 | |
| 5827 | if (! (*info->callbacks->reloc_overflow) (info, |
| 5828 | (h ? &h->root : NULL), |
| 5829 | sym_name, |
| 5830 | howto->name, |
| 5831 | rel->r_addend, |
| 5832 | input_bfd, |
| 5833 | input_section, |
| 5834 | rel->r_offset)) |
| 5835 | return FALSE; |
| 5836 | } |
| 5837 | else |
| 5838 | { |
| 5839 | (*_bfd_error_handler) |
| 5840 | (_("%B(%A+0x%lx): %s reloc against `%s': error %d"), |
| 5841 | input_bfd, input_section, |
| 5842 | (long) rel->r_offset, howto->name, sym_name, (int) r); |
| 5843 | ret = FALSE; |
| 5844 | } |
| 5845 | } |
| 5846 | } |
| 5847 | |
| 5848 | #ifdef DEBUG |
| 5849 | fprintf (stderr, "\n"); |
| 5850 | #endif |
| 5851 | |
| 5852 | return ret; |
| 5853 | } |
| 5854 | \f |
| 5855 | /* Finish up dynamic symbol handling. We set the contents of various |
| 5856 | dynamic sections here. */ |
| 5857 | |
| 5858 | static bfd_boolean |
| 5859 | ppc_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 5860 | struct bfd_link_info *info, |
| 5861 | struct elf_link_hash_entry *h, |
| 5862 | Elf_Internal_Sym *sym) |
| 5863 | { |
| 5864 | struct ppc_elf_link_hash_table *htab; |
| 5865 | |
| 5866 | #ifdef DEBUG |
| 5867 | fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", |
| 5868 | h->root.root.string); |
| 5869 | #endif |
| 5870 | |
| 5871 | htab = ppc_elf_hash_table (info); |
| 5872 | BFD_ASSERT (htab->elf.dynobj != NULL); |
| 5873 | |
| 5874 | if (h->plt.offset != (bfd_vma) -1) |
| 5875 | { |
| 5876 | Elf_Internal_Rela rela; |
| 5877 | bfd_byte *loc; |
| 5878 | bfd_vma reloc_index; |
| 5879 | |
| 5880 | #ifdef DEBUG |
| 5881 | fprintf (stderr, ", plt_offset = %d", h->plt.offset); |
| 5882 | #endif |
| 5883 | |
| 5884 | /* This symbol has an entry in the procedure linkage table. Set |
| 5885 | it up. */ |
| 5886 | |
| 5887 | BFD_ASSERT (h->dynindx != -1); |
| 5888 | BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL); |
| 5889 | |
| 5890 | /* We don't need to fill in the .plt. The ppc dynamic linker |
| 5891 | will fill it in. */ |
| 5892 | |
| 5893 | /* Fill in the entry in the .rela.plt section. */ |
| 5894 | rela.r_offset = (htab->plt->output_section->vma |
| 5895 | + htab->plt->output_offset |
| 5896 | + h->plt.offset); |
| 5897 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT); |
| 5898 | rela.r_addend = 0; |
| 5899 | |
| 5900 | reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE; |
| 5901 | if (reloc_index > PLT_NUM_SINGLE_ENTRIES) |
| 5902 | reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; |
| 5903 | loc = (htab->relplt->contents |
| 5904 | + reloc_index * sizeof (Elf32_External_Rela)); |
| 5905 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 5906 | |
| 5907 | if (!h->def_regular) |
| 5908 | { |
| 5909 | /* Mark the symbol as undefined, rather than as defined in |
| 5910 | the .plt section. Leave the value alone. */ |
| 5911 | sym->st_shndx = SHN_UNDEF; |
| 5912 | /* If the symbol is weak, we do need to clear the value. |
| 5913 | Otherwise, the PLT entry would provide a definition for |
| 5914 | the symbol even if the symbol wasn't defined anywhere, |
| 5915 | and so the symbol would never be NULL. */ |
| 5916 | if (!h->ref_regular_nonweak) |
| 5917 | sym->st_value = 0; |
| 5918 | } |
| 5919 | } |
| 5920 | |
| 5921 | if (h->needs_copy) |
| 5922 | { |
| 5923 | asection *s; |
| 5924 | Elf_Internal_Rela rela; |
| 5925 | bfd_byte *loc; |
| 5926 | |
| 5927 | /* This symbols needs a copy reloc. Set it up. */ |
| 5928 | |
| 5929 | #ifdef DEBUG |
| 5930 | fprintf (stderr, ", copy"); |
| 5931 | #endif |
| 5932 | |
| 5933 | BFD_ASSERT (h->dynindx != -1); |
| 5934 | |
| 5935 | if (h->size <= elf_gp_size (htab->elf.dynobj)) |
| 5936 | s = htab->relsbss; |
| 5937 | else |
| 5938 | s = htab->relbss; |
| 5939 | BFD_ASSERT (s != NULL); |
| 5940 | |
| 5941 | rela.r_offset = (h->root.u.def.value |
| 5942 | + h->root.u.def.section->output_section->vma |
| 5943 | + h->root.u.def.section->output_offset); |
| 5944 | rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY); |
| 5945 | rela.r_addend = 0; |
| 5946 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 5947 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 5948 | } |
| 5949 | |
| 5950 | #ifdef DEBUG |
| 5951 | fprintf (stderr, "\n"); |
| 5952 | #endif |
| 5953 | |
| 5954 | /* Mark some specially defined symbols as absolute. */ |
| 5955 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 5956 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| 5957 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| 5958 | sym->st_shndx = SHN_ABS; |
| 5959 | |
| 5960 | return TRUE; |
| 5961 | } |
| 5962 | \f |
| 5963 | static enum elf_reloc_type_class |
| 5964 | ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela) |
| 5965 | { |
| 5966 | switch (ELF32_R_TYPE (rela->r_info)) |
| 5967 | { |
| 5968 | case R_PPC_RELATIVE: |
| 5969 | return reloc_class_relative; |
| 5970 | case R_PPC_REL24: |
| 5971 | case R_PPC_ADDR24: |
| 5972 | case R_PPC_JMP_SLOT: |
| 5973 | return reloc_class_plt; |
| 5974 | case R_PPC_COPY: |
| 5975 | return reloc_class_copy; |
| 5976 | default: |
| 5977 | return reloc_class_normal; |
| 5978 | } |
| 5979 | } |
| 5980 | \f |
| 5981 | /* Finish up the dynamic sections. */ |
| 5982 | |
| 5983 | static bfd_boolean |
| 5984 | ppc_elf_finish_dynamic_sections (bfd *output_bfd, |
| 5985 | struct bfd_link_info *info) |
| 5986 | { |
| 5987 | asection *sdyn; |
| 5988 | struct ppc_elf_link_hash_table *htab; |
| 5989 | |
| 5990 | #ifdef DEBUG |
| 5991 | fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n"); |
| 5992 | #endif |
| 5993 | |
| 5994 | htab = ppc_elf_hash_table (info); |
| 5995 | sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic"); |
| 5996 | |
| 5997 | if (htab->elf.dynamic_sections_created) |
| 5998 | { |
| 5999 | Elf32_External_Dyn *dyncon, *dynconend; |
| 6000 | |
| 6001 | BFD_ASSERT (htab->plt != NULL && sdyn != NULL); |
| 6002 | |
| 6003 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 6004 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 6005 | for (; dyncon < dynconend; dyncon++) |
| 6006 | { |
| 6007 | Elf_Internal_Dyn dyn; |
| 6008 | asection *s; |
| 6009 | |
| 6010 | bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn); |
| 6011 | |
| 6012 | switch (dyn.d_tag) |
| 6013 | { |
| 6014 | case DT_PLTGOT: |
| 6015 | s = htab->plt; |
| 6016 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 6017 | break; |
| 6018 | |
| 6019 | case DT_PLTRELSZ: |
| 6020 | dyn.d_un.d_val = htab->relplt->size; |
| 6021 | break; |
| 6022 | |
| 6023 | case DT_JMPREL: |
| 6024 | s = htab->relplt; |
| 6025 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| 6026 | break; |
| 6027 | |
| 6028 | default: |
| 6029 | continue; |
| 6030 | } |
| 6031 | |
| 6032 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 6033 | } |
| 6034 | } |
| 6035 | |
| 6036 | /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can |
| 6037 | easily find the address of the _GLOBAL_OFFSET_TABLE_. */ |
| 6038 | if (htab->got) |
| 6039 | { |
| 6040 | unsigned char *contents = htab->got->contents; |
| 6041 | bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents); |
| 6042 | |
| 6043 | if (sdyn == NULL) |
| 6044 | bfd_put_32 (output_bfd, 0, contents + 4); |
| 6045 | else |
| 6046 | bfd_put_32 (output_bfd, |
| 6047 | sdyn->output_section->vma + sdyn->output_offset, |
| 6048 | contents + 4); |
| 6049 | |
| 6050 | elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4; |
| 6051 | } |
| 6052 | |
| 6053 | return TRUE; |
| 6054 | } |
| 6055 | \f |
| 6056 | #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec |
| 6057 | #define TARGET_LITTLE_NAME "elf32-powerpcle" |
| 6058 | #define TARGET_BIG_SYM bfd_elf32_powerpc_vec |
| 6059 | #define TARGET_BIG_NAME "elf32-powerpc" |
| 6060 | #define ELF_ARCH bfd_arch_powerpc |
| 6061 | #define ELF_MACHINE_CODE EM_PPC |
| 6062 | #ifdef __QNXTARGET__ |
| 6063 | #define ELF_MAXPAGESIZE 0x1000 |
| 6064 | #else |
| 6065 | #define ELF_MAXPAGESIZE 0x10000 |
| 6066 | #endif |
| 6067 | #define ELF_MINPAGESIZE 0x1000 |
| 6068 | #define elf_info_to_howto ppc_elf_info_to_howto |
| 6069 | |
| 6070 | #ifdef EM_CYGNUS_POWERPC |
| 6071 | #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC |
| 6072 | #endif |
| 6073 | |
| 6074 | #ifdef EM_PPC_OLD |
| 6075 | #define ELF_MACHINE_ALT2 EM_PPC_OLD |
| 6076 | #endif |
| 6077 | |
| 6078 | #define elf_backend_plt_not_loaded 1 |
| 6079 | #define elf_backend_got_symbol_offset 4 |
| 6080 | #define elf_backend_can_gc_sections 1 |
| 6081 | #define elf_backend_can_refcount 1 |
| 6082 | #define elf_backend_got_header_size 12 |
| 6083 | #define elf_backend_rela_normal 1 |
| 6084 | |
| 6085 | #define bfd_elf32_mkobject ppc_elf_mkobject |
| 6086 | #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data |
| 6087 | #define bfd_elf32_bfd_relax_section ppc_elf_relax_section |
| 6088 | #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup |
| 6089 | #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags |
| 6090 | #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create |
| 6091 | |
| 6092 | #define elf_backend_object_p ppc_elf_object_p |
| 6093 | #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook |
| 6094 | #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook |
| 6095 | #define elf_backend_section_from_shdr ppc_elf_section_from_shdr |
| 6096 | #define elf_backend_relocate_section ppc_elf_relocate_section |
| 6097 | #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections |
| 6098 | #define elf_backend_check_relocs ppc_elf_check_relocs |
| 6099 | #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol |
| 6100 | #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol |
| 6101 | #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook |
| 6102 | #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections |
| 6103 | #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol |
| 6104 | #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections |
| 6105 | #define elf_backend_fake_sections ppc_elf_fake_sections |
| 6106 | #define elf_backend_additional_program_headers ppc_elf_additional_program_headers |
| 6107 | #define elf_backend_grok_prstatus ppc_elf_grok_prstatus |
| 6108 | #define elf_backend_grok_psinfo ppc_elf_grok_psinfo |
| 6109 | #define elf_backend_reloc_type_class ppc_elf_reloc_type_class |
| 6110 | #define elf_backend_begin_write_processing ppc_elf_begin_write_processing |
| 6111 | #define elf_backend_final_write_processing ppc_elf_final_write_processing |
| 6112 | #define elf_backend_write_section ppc_elf_write_section |
| 6113 | #define elf_backend_special_sections ppc_elf_special_sections |
| 6114 | #define elf_backend_plt_sym_val ppc_elf_plt_sym_val |
| 6115 | |
| 6116 | #include "elf32-target.h" |