| 1 | /* 32-bit ELF support for ARM |
| 2 | Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "bfd.h" |
| 22 | #include "sysdep.h" |
| 23 | #include "libiberty.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "elf-vxworks.h" |
| 27 | #include "elf/arm.h" |
| 28 | |
| 29 | #ifndef NUM_ELEM |
| 30 | #define NUM_ELEM(a) (sizeof (a) / (sizeof (a)[0])) |
| 31 | #endif |
| 32 | |
| 33 | /* Return the relocation section associated with NAME. HTAB is the |
| 34 | bfd's elf32_arm_link_hash_entry. */ |
| 35 | #define RELOC_SECTION(HTAB, NAME) \ |
| 36 | ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME) |
| 37 | |
| 38 | /* Return size of a relocation entry. HTAB is the bfd's |
| 39 | elf32_arm_link_hash_entry. */ |
| 40 | #define RELOC_SIZE(HTAB) \ |
| 41 | ((HTAB)->use_rel \ |
| 42 | ? sizeof (Elf32_External_Rel) \ |
| 43 | : sizeof (Elf32_External_Rela)) |
| 44 | |
| 45 | /* Return function to swap relocations in. HTAB is the bfd's |
| 46 | elf32_arm_link_hash_entry. */ |
| 47 | #define SWAP_RELOC_IN(HTAB) \ |
| 48 | ((HTAB)->use_rel \ |
| 49 | ? bfd_elf32_swap_reloc_in \ |
| 50 | : bfd_elf32_swap_reloca_in) |
| 51 | |
| 52 | /* Return function to swap relocations out. HTAB is the bfd's |
| 53 | elf32_arm_link_hash_entry. */ |
| 54 | #define SWAP_RELOC_OUT(HTAB) \ |
| 55 | ((HTAB)->use_rel \ |
| 56 | ? bfd_elf32_swap_reloc_out \ |
| 57 | : bfd_elf32_swap_reloca_out) |
| 58 | |
| 59 | #define elf_info_to_howto 0 |
| 60 | #define elf_info_to_howto_rel elf32_arm_info_to_howto |
| 61 | |
| 62 | #define ARM_ELF_ABI_VERSION 0 |
| 63 | #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM |
| 64 | |
| 65 | static const struct elf_backend_data elf32_arm_vxworks_bed; |
| 66 | |
| 67 | /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g. |
| 68 | R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO |
| 69 | in that slot. */ |
| 70 | |
| 71 | static reloc_howto_type elf32_arm_howto_table_1[] = |
| 72 | { |
| 73 | /* No relocation */ |
| 74 | HOWTO (R_ARM_NONE, /* type */ |
| 75 | 0, /* rightshift */ |
| 76 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 77 | 0, /* bitsize */ |
| 78 | FALSE, /* pc_relative */ |
| 79 | 0, /* bitpos */ |
| 80 | complain_overflow_dont,/* complain_on_overflow */ |
| 81 | bfd_elf_generic_reloc, /* special_function */ |
| 82 | "R_ARM_NONE", /* name */ |
| 83 | FALSE, /* partial_inplace */ |
| 84 | 0, /* src_mask */ |
| 85 | 0, /* dst_mask */ |
| 86 | FALSE), /* pcrel_offset */ |
| 87 | |
| 88 | HOWTO (R_ARM_PC24, /* type */ |
| 89 | 2, /* rightshift */ |
| 90 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 91 | 24, /* bitsize */ |
| 92 | TRUE, /* pc_relative */ |
| 93 | 0, /* bitpos */ |
| 94 | complain_overflow_signed,/* complain_on_overflow */ |
| 95 | bfd_elf_generic_reloc, /* special_function */ |
| 96 | "R_ARM_PC24", /* name */ |
| 97 | FALSE, /* partial_inplace */ |
| 98 | 0x00ffffff, /* src_mask */ |
| 99 | 0x00ffffff, /* dst_mask */ |
| 100 | TRUE), /* pcrel_offset */ |
| 101 | |
| 102 | /* 32 bit absolute */ |
| 103 | HOWTO (R_ARM_ABS32, /* type */ |
| 104 | 0, /* rightshift */ |
| 105 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 106 | 32, /* bitsize */ |
| 107 | FALSE, /* pc_relative */ |
| 108 | 0, /* bitpos */ |
| 109 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 110 | bfd_elf_generic_reloc, /* special_function */ |
| 111 | "R_ARM_ABS32", /* name */ |
| 112 | FALSE, /* partial_inplace */ |
| 113 | 0xffffffff, /* src_mask */ |
| 114 | 0xffffffff, /* dst_mask */ |
| 115 | FALSE), /* pcrel_offset */ |
| 116 | |
| 117 | /* standard 32bit pc-relative reloc */ |
| 118 | HOWTO (R_ARM_REL32, /* type */ |
| 119 | 0, /* rightshift */ |
| 120 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 121 | 32, /* bitsize */ |
| 122 | TRUE, /* pc_relative */ |
| 123 | 0, /* bitpos */ |
| 124 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 125 | bfd_elf_generic_reloc, /* special_function */ |
| 126 | "R_ARM_REL32", /* name */ |
| 127 | FALSE, /* partial_inplace */ |
| 128 | 0xffffffff, /* src_mask */ |
| 129 | 0xffffffff, /* dst_mask */ |
| 130 | TRUE), /* pcrel_offset */ |
| 131 | |
| 132 | /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */ |
| 133 | HOWTO (R_ARM_PC13, /* type */ |
| 134 | 0, /* rightshift */ |
| 135 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 136 | 8, /* bitsize */ |
| 137 | FALSE, /* pc_relative */ |
| 138 | 0, /* bitpos */ |
| 139 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 140 | bfd_elf_generic_reloc, /* special_function */ |
| 141 | "R_ARM_PC13", /* name */ |
| 142 | FALSE, /* partial_inplace */ |
| 143 | 0x000000ff, /* src_mask */ |
| 144 | 0x000000ff, /* dst_mask */ |
| 145 | FALSE), /* pcrel_offset */ |
| 146 | |
| 147 | /* 16 bit absolute */ |
| 148 | HOWTO (R_ARM_ABS16, /* type */ |
| 149 | 0, /* rightshift */ |
| 150 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 151 | 16, /* bitsize */ |
| 152 | FALSE, /* pc_relative */ |
| 153 | 0, /* bitpos */ |
| 154 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 155 | bfd_elf_generic_reloc, /* special_function */ |
| 156 | "R_ARM_ABS16", /* name */ |
| 157 | FALSE, /* partial_inplace */ |
| 158 | 0x0000ffff, /* src_mask */ |
| 159 | 0x0000ffff, /* dst_mask */ |
| 160 | FALSE), /* pcrel_offset */ |
| 161 | |
| 162 | /* 12 bit absolute */ |
| 163 | HOWTO (R_ARM_ABS12, /* type */ |
| 164 | 0, /* rightshift */ |
| 165 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 166 | 12, /* bitsize */ |
| 167 | FALSE, /* pc_relative */ |
| 168 | 0, /* bitpos */ |
| 169 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 170 | bfd_elf_generic_reloc, /* special_function */ |
| 171 | "R_ARM_ABS12", /* name */ |
| 172 | FALSE, /* partial_inplace */ |
| 173 | 0x00000fff, /* src_mask */ |
| 174 | 0x00000fff, /* dst_mask */ |
| 175 | FALSE), /* pcrel_offset */ |
| 176 | |
| 177 | HOWTO (R_ARM_THM_ABS5, /* type */ |
| 178 | 6, /* rightshift */ |
| 179 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 180 | 5, /* bitsize */ |
| 181 | FALSE, /* pc_relative */ |
| 182 | 0, /* bitpos */ |
| 183 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 184 | bfd_elf_generic_reloc, /* special_function */ |
| 185 | "R_ARM_THM_ABS5", /* name */ |
| 186 | FALSE, /* partial_inplace */ |
| 187 | 0x000007e0, /* src_mask */ |
| 188 | 0x000007e0, /* dst_mask */ |
| 189 | FALSE), /* pcrel_offset */ |
| 190 | |
| 191 | /* 8 bit absolute */ |
| 192 | HOWTO (R_ARM_ABS8, /* type */ |
| 193 | 0, /* rightshift */ |
| 194 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 195 | 8, /* bitsize */ |
| 196 | FALSE, /* pc_relative */ |
| 197 | 0, /* bitpos */ |
| 198 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 199 | bfd_elf_generic_reloc, /* special_function */ |
| 200 | "R_ARM_ABS8", /* name */ |
| 201 | FALSE, /* partial_inplace */ |
| 202 | 0x000000ff, /* src_mask */ |
| 203 | 0x000000ff, /* dst_mask */ |
| 204 | FALSE), /* pcrel_offset */ |
| 205 | |
| 206 | HOWTO (R_ARM_SBREL32, /* type */ |
| 207 | 0, /* rightshift */ |
| 208 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 209 | 32, /* bitsize */ |
| 210 | FALSE, /* pc_relative */ |
| 211 | 0, /* bitpos */ |
| 212 | complain_overflow_dont,/* complain_on_overflow */ |
| 213 | bfd_elf_generic_reloc, /* special_function */ |
| 214 | "R_ARM_SBREL32", /* name */ |
| 215 | FALSE, /* partial_inplace */ |
| 216 | 0xffffffff, /* src_mask */ |
| 217 | 0xffffffff, /* dst_mask */ |
| 218 | FALSE), /* pcrel_offset */ |
| 219 | |
| 220 | /* FIXME: Has two more bits of offset in Thumb32. */ |
| 221 | HOWTO (R_ARM_THM_CALL, /* type */ |
| 222 | 1, /* rightshift */ |
| 223 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 224 | 23, /* bitsize */ |
| 225 | TRUE, /* pc_relative */ |
| 226 | 0, /* bitpos */ |
| 227 | complain_overflow_signed,/* complain_on_overflow */ |
| 228 | bfd_elf_generic_reloc, /* special_function */ |
| 229 | "R_ARM_THM_CALL", /* name */ |
| 230 | FALSE, /* partial_inplace */ |
| 231 | 0x07ff07ff, /* src_mask */ |
| 232 | 0x07ff07ff, /* dst_mask */ |
| 233 | TRUE), /* pcrel_offset */ |
| 234 | |
| 235 | HOWTO (R_ARM_THM_PC8, /* type */ |
| 236 | 1, /* rightshift */ |
| 237 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 238 | 8, /* bitsize */ |
| 239 | TRUE, /* pc_relative */ |
| 240 | 0, /* bitpos */ |
| 241 | complain_overflow_signed,/* complain_on_overflow */ |
| 242 | bfd_elf_generic_reloc, /* special_function */ |
| 243 | "R_ARM_THM_PC8", /* name */ |
| 244 | FALSE, /* partial_inplace */ |
| 245 | 0x000000ff, /* src_mask */ |
| 246 | 0x000000ff, /* dst_mask */ |
| 247 | TRUE), /* pcrel_offset */ |
| 248 | |
| 249 | HOWTO (R_ARM_BREL_ADJ, /* type */ |
| 250 | 1, /* rightshift */ |
| 251 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 252 | 32, /* bitsize */ |
| 253 | FALSE, /* pc_relative */ |
| 254 | 0, /* bitpos */ |
| 255 | complain_overflow_signed,/* complain_on_overflow */ |
| 256 | bfd_elf_generic_reloc, /* special_function */ |
| 257 | "R_ARM_BREL_ADJ", /* name */ |
| 258 | FALSE, /* partial_inplace */ |
| 259 | 0xffffffff, /* src_mask */ |
| 260 | 0xffffffff, /* dst_mask */ |
| 261 | FALSE), /* pcrel_offset */ |
| 262 | |
| 263 | HOWTO (R_ARM_SWI24, /* type */ |
| 264 | 0, /* rightshift */ |
| 265 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 266 | 0, /* bitsize */ |
| 267 | FALSE, /* pc_relative */ |
| 268 | 0, /* bitpos */ |
| 269 | complain_overflow_signed,/* complain_on_overflow */ |
| 270 | bfd_elf_generic_reloc, /* special_function */ |
| 271 | "R_ARM_SWI24", /* name */ |
| 272 | FALSE, /* partial_inplace */ |
| 273 | 0x00000000, /* src_mask */ |
| 274 | 0x00000000, /* dst_mask */ |
| 275 | FALSE), /* pcrel_offset */ |
| 276 | |
| 277 | HOWTO (R_ARM_THM_SWI8, /* type */ |
| 278 | 0, /* rightshift */ |
| 279 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 280 | 0, /* bitsize */ |
| 281 | FALSE, /* pc_relative */ |
| 282 | 0, /* bitpos */ |
| 283 | complain_overflow_signed,/* complain_on_overflow */ |
| 284 | bfd_elf_generic_reloc, /* special_function */ |
| 285 | "R_ARM_SWI8", /* name */ |
| 286 | FALSE, /* partial_inplace */ |
| 287 | 0x00000000, /* src_mask */ |
| 288 | 0x00000000, /* dst_mask */ |
| 289 | FALSE), /* pcrel_offset */ |
| 290 | |
| 291 | /* BLX instruction for the ARM. */ |
| 292 | HOWTO (R_ARM_XPC25, /* type */ |
| 293 | 2, /* rightshift */ |
| 294 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 295 | 25, /* bitsize */ |
| 296 | TRUE, /* pc_relative */ |
| 297 | 0, /* bitpos */ |
| 298 | complain_overflow_signed,/* complain_on_overflow */ |
| 299 | bfd_elf_generic_reloc, /* special_function */ |
| 300 | "R_ARM_XPC25", /* name */ |
| 301 | FALSE, /* partial_inplace */ |
| 302 | 0x00ffffff, /* src_mask */ |
| 303 | 0x00ffffff, /* dst_mask */ |
| 304 | TRUE), /* pcrel_offset */ |
| 305 | |
| 306 | /* BLX instruction for the Thumb. */ |
| 307 | HOWTO (R_ARM_THM_XPC22, /* type */ |
| 308 | 2, /* rightshift */ |
| 309 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 310 | 22, /* bitsize */ |
| 311 | TRUE, /* pc_relative */ |
| 312 | 0, /* bitpos */ |
| 313 | complain_overflow_signed,/* complain_on_overflow */ |
| 314 | bfd_elf_generic_reloc, /* special_function */ |
| 315 | "R_ARM_THM_XPC22", /* name */ |
| 316 | FALSE, /* partial_inplace */ |
| 317 | 0x07ff07ff, /* src_mask */ |
| 318 | 0x07ff07ff, /* dst_mask */ |
| 319 | TRUE), /* pcrel_offset */ |
| 320 | |
| 321 | /* Dynamic TLS relocations. */ |
| 322 | |
| 323 | HOWTO (R_ARM_TLS_DTPMOD32, /* type */ |
| 324 | 0, /* rightshift */ |
| 325 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 326 | 32, /* bitsize */ |
| 327 | FALSE, /* pc_relative */ |
| 328 | 0, /* bitpos */ |
| 329 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 330 | bfd_elf_generic_reloc, /* special_function */ |
| 331 | "R_ARM_TLS_DTPMOD32", /* name */ |
| 332 | TRUE, /* partial_inplace */ |
| 333 | 0xffffffff, /* src_mask */ |
| 334 | 0xffffffff, /* dst_mask */ |
| 335 | FALSE), /* pcrel_offset */ |
| 336 | |
| 337 | HOWTO (R_ARM_TLS_DTPOFF32, /* type */ |
| 338 | 0, /* rightshift */ |
| 339 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 340 | 32, /* bitsize */ |
| 341 | FALSE, /* pc_relative */ |
| 342 | 0, /* bitpos */ |
| 343 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 344 | bfd_elf_generic_reloc, /* special_function */ |
| 345 | "R_ARM_TLS_DTPOFF32", /* name */ |
| 346 | TRUE, /* partial_inplace */ |
| 347 | 0xffffffff, /* src_mask */ |
| 348 | 0xffffffff, /* dst_mask */ |
| 349 | FALSE), /* pcrel_offset */ |
| 350 | |
| 351 | HOWTO (R_ARM_TLS_TPOFF32, /* type */ |
| 352 | 0, /* rightshift */ |
| 353 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 354 | 32, /* bitsize */ |
| 355 | FALSE, /* pc_relative */ |
| 356 | 0, /* bitpos */ |
| 357 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 358 | bfd_elf_generic_reloc, /* special_function */ |
| 359 | "R_ARM_TLS_TPOFF32", /* name */ |
| 360 | TRUE, /* partial_inplace */ |
| 361 | 0xffffffff, /* src_mask */ |
| 362 | 0xffffffff, /* dst_mask */ |
| 363 | FALSE), /* pcrel_offset */ |
| 364 | |
| 365 | /* Relocs used in ARM Linux */ |
| 366 | |
| 367 | HOWTO (R_ARM_COPY, /* type */ |
| 368 | 0, /* rightshift */ |
| 369 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 370 | 32, /* bitsize */ |
| 371 | FALSE, /* pc_relative */ |
| 372 | 0, /* bitpos */ |
| 373 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 374 | bfd_elf_generic_reloc, /* special_function */ |
| 375 | "R_ARM_COPY", /* name */ |
| 376 | TRUE, /* partial_inplace */ |
| 377 | 0xffffffff, /* src_mask */ |
| 378 | 0xffffffff, /* dst_mask */ |
| 379 | FALSE), /* pcrel_offset */ |
| 380 | |
| 381 | HOWTO (R_ARM_GLOB_DAT, /* 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_ARM_GLOB_DAT", /* name */ |
| 390 | TRUE, /* partial_inplace */ |
| 391 | 0xffffffff, /* src_mask */ |
| 392 | 0xffffffff, /* dst_mask */ |
| 393 | FALSE), /* pcrel_offset */ |
| 394 | |
| 395 | HOWTO (R_ARM_JUMP_SLOT, /* type */ |
| 396 | 0, /* rightshift */ |
| 397 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 398 | 32, /* bitsize */ |
| 399 | FALSE, /* pc_relative */ |
| 400 | 0, /* bitpos */ |
| 401 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 402 | bfd_elf_generic_reloc, /* special_function */ |
| 403 | "R_ARM_JUMP_SLOT", /* name */ |
| 404 | TRUE, /* partial_inplace */ |
| 405 | 0xffffffff, /* src_mask */ |
| 406 | 0xffffffff, /* dst_mask */ |
| 407 | FALSE), /* pcrel_offset */ |
| 408 | |
| 409 | HOWTO (R_ARM_RELATIVE, /* type */ |
| 410 | 0, /* rightshift */ |
| 411 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 412 | 32, /* bitsize */ |
| 413 | FALSE, /* pc_relative */ |
| 414 | 0, /* bitpos */ |
| 415 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 416 | bfd_elf_generic_reloc, /* special_function */ |
| 417 | "R_ARM_RELATIVE", /* name */ |
| 418 | TRUE, /* partial_inplace */ |
| 419 | 0xffffffff, /* src_mask */ |
| 420 | 0xffffffff, /* dst_mask */ |
| 421 | FALSE), /* pcrel_offset */ |
| 422 | |
| 423 | HOWTO (R_ARM_GOTOFF32, /* type */ |
| 424 | 0, /* rightshift */ |
| 425 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 426 | 32, /* bitsize */ |
| 427 | FALSE, /* pc_relative */ |
| 428 | 0, /* bitpos */ |
| 429 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 430 | bfd_elf_generic_reloc, /* special_function */ |
| 431 | "R_ARM_GOTOFF32", /* name */ |
| 432 | TRUE, /* partial_inplace */ |
| 433 | 0xffffffff, /* src_mask */ |
| 434 | 0xffffffff, /* dst_mask */ |
| 435 | FALSE), /* pcrel_offset */ |
| 436 | |
| 437 | HOWTO (R_ARM_GOTPC, /* type */ |
| 438 | 0, /* rightshift */ |
| 439 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 440 | 32, /* bitsize */ |
| 441 | TRUE, /* pc_relative */ |
| 442 | 0, /* bitpos */ |
| 443 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 444 | bfd_elf_generic_reloc, /* special_function */ |
| 445 | "R_ARM_GOTPC", /* name */ |
| 446 | TRUE, /* partial_inplace */ |
| 447 | 0xffffffff, /* src_mask */ |
| 448 | 0xffffffff, /* dst_mask */ |
| 449 | TRUE), /* pcrel_offset */ |
| 450 | |
| 451 | HOWTO (R_ARM_GOT32, /* type */ |
| 452 | 0, /* rightshift */ |
| 453 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 454 | 32, /* bitsize */ |
| 455 | FALSE, /* pc_relative */ |
| 456 | 0, /* bitpos */ |
| 457 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 458 | bfd_elf_generic_reloc, /* special_function */ |
| 459 | "R_ARM_GOT32", /* name */ |
| 460 | TRUE, /* partial_inplace */ |
| 461 | 0xffffffff, /* src_mask */ |
| 462 | 0xffffffff, /* dst_mask */ |
| 463 | FALSE), /* pcrel_offset */ |
| 464 | |
| 465 | HOWTO (R_ARM_PLT32, /* type */ |
| 466 | 2, /* rightshift */ |
| 467 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 468 | 24, /* bitsize */ |
| 469 | TRUE, /* pc_relative */ |
| 470 | 0, /* bitpos */ |
| 471 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 472 | bfd_elf_generic_reloc, /* special_function */ |
| 473 | "R_ARM_PLT32", /* name */ |
| 474 | FALSE, /* partial_inplace */ |
| 475 | 0x00ffffff, /* src_mask */ |
| 476 | 0x00ffffff, /* dst_mask */ |
| 477 | TRUE), /* pcrel_offset */ |
| 478 | |
| 479 | HOWTO (R_ARM_CALL, /* type */ |
| 480 | 2, /* rightshift */ |
| 481 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 482 | 24, /* bitsize */ |
| 483 | TRUE, /* pc_relative */ |
| 484 | 0, /* bitpos */ |
| 485 | complain_overflow_signed,/* complain_on_overflow */ |
| 486 | bfd_elf_generic_reloc, /* special_function */ |
| 487 | "R_ARM_CALL", /* name */ |
| 488 | FALSE, /* partial_inplace */ |
| 489 | 0x00ffffff, /* src_mask */ |
| 490 | 0x00ffffff, /* dst_mask */ |
| 491 | TRUE), /* pcrel_offset */ |
| 492 | |
| 493 | HOWTO (R_ARM_JUMP24, /* type */ |
| 494 | 2, /* rightshift */ |
| 495 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 496 | 24, /* bitsize */ |
| 497 | TRUE, /* pc_relative */ |
| 498 | 0, /* bitpos */ |
| 499 | complain_overflow_signed,/* complain_on_overflow */ |
| 500 | bfd_elf_generic_reloc, /* special_function */ |
| 501 | "R_ARM_JUMP24", /* name */ |
| 502 | FALSE, /* partial_inplace */ |
| 503 | 0x00ffffff, /* src_mask */ |
| 504 | 0x00ffffff, /* dst_mask */ |
| 505 | TRUE), /* pcrel_offset */ |
| 506 | |
| 507 | HOWTO (R_ARM_THM_JUMP24, /* type */ |
| 508 | 1, /* rightshift */ |
| 509 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 510 | 24, /* bitsize */ |
| 511 | TRUE, /* pc_relative */ |
| 512 | 0, /* bitpos */ |
| 513 | complain_overflow_signed,/* complain_on_overflow */ |
| 514 | bfd_elf_generic_reloc, /* special_function */ |
| 515 | "R_ARM_THM_JUMP24", /* name */ |
| 516 | FALSE, /* partial_inplace */ |
| 517 | 0x07ff2fff, /* src_mask */ |
| 518 | 0x07ff2fff, /* dst_mask */ |
| 519 | TRUE), /* pcrel_offset */ |
| 520 | |
| 521 | HOWTO (R_ARM_BASE_ABS, /* type */ |
| 522 | 0, /* rightshift */ |
| 523 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 524 | 32, /* bitsize */ |
| 525 | FALSE, /* pc_relative */ |
| 526 | 0, /* bitpos */ |
| 527 | complain_overflow_dont,/* complain_on_overflow */ |
| 528 | bfd_elf_generic_reloc, /* special_function */ |
| 529 | "R_ARM_BASE_ABS", /* name */ |
| 530 | FALSE, /* partial_inplace */ |
| 531 | 0xffffffff, /* src_mask */ |
| 532 | 0xffffffff, /* dst_mask */ |
| 533 | FALSE), /* pcrel_offset */ |
| 534 | |
| 535 | HOWTO (R_ARM_ALU_PCREL7_0, /* type */ |
| 536 | 0, /* rightshift */ |
| 537 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 538 | 12, /* bitsize */ |
| 539 | TRUE, /* pc_relative */ |
| 540 | 0, /* bitpos */ |
| 541 | complain_overflow_dont,/* complain_on_overflow */ |
| 542 | bfd_elf_generic_reloc, /* special_function */ |
| 543 | "R_ARM_ALU_PCREL_7_0", /* name */ |
| 544 | FALSE, /* partial_inplace */ |
| 545 | 0x00000fff, /* src_mask */ |
| 546 | 0x00000fff, /* dst_mask */ |
| 547 | TRUE), /* pcrel_offset */ |
| 548 | |
| 549 | HOWTO (R_ARM_ALU_PCREL15_8, /* type */ |
| 550 | 0, /* rightshift */ |
| 551 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 552 | 12, /* bitsize */ |
| 553 | TRUE, /* pc_relative */ |
| 554 | 8, /* bitpos */ |
| 555 | complain_overflow_dont,/* complain_on_overflow */ |
| 556 | bfd_elf_generic_reloc, /* special_function */ |
| 557 | "R_ARM_ALU_PCREL_15_8",/* name */ |
| 558 | FALSE, /* partial_inplace */ |
| 559 | 0x00000fff, /* src_mask */ |
| 560 | 0x00000fff, /* dst_mask */ |
| 561 | TRUE), /* pcrel_offset */ |
| 562 | |
| 563 | HOWTO (R_ARM_ALU_PCREL23_15, /* type */ |
| 564 | 0, /* rightshift */ |
| 565 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 566 | 12, /* bitsize */ |
| 567 | TRUE, /* pc_relative */ |
| 568 | 16, /* bitpos */ |
| 569 | complain_overflow_dont,/* complain_on_overflow */ |
| 570 | bfd_elf_generic_reloc, /* special_function */ |
| 571 | "R_ARM_ALU_PCREL_23_15",/* name */ |
| 572 | FALSE, /* partial_inplace */ |
| 573 | 0x00000fff, /* src_mask */ |
| 574 | 0x00000fff, /* dst_mask */ |
| 575 | TRUE), /* pcrel_offset */ |
| 576 | |
| 577 | HOWTO (R_ARM_LDR_SBREL_11_0, /* type */ |
| 578 | 0, /* rightshift */ |
| 579 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 580 | 12, /* bitsize */ |
| 581 | FALSE, /* pc_relative */ |
| 582 | 0, /* bitpos */ |
| 583 | complain_overflow_dont,/* complain_on_overflow */ |
| 584 | bfd_elf_generic_reloc, /* special_function */ |
| 585 | "R_ARM_LDR_SBREL_11_0",/* name */ |
| 586 | FALSE, /* partial_inplace */ |
| 587 | 0x00000fff, /* src_mask */ |
| 588 | 0x00000fff, /* dst_mask */ |
| 589 | FALSE), /* pcrel_offset */ |
| 590 | |
| 591 | HOWTO (R_ARM_ALU_SBREL_19_12, /* type */ |
| 592 | 0, /* rightshift */ |
| 593 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 594 | 8, /* bitsize */ |
| 595 | FALSE, /* pc_relative */ |
| 596 | 12, /* bitpos */ |
| 597 | complain_overflow_dont,/* complain_on_overflow */ |
| 598 | bfd_elf_generic_reloc, /* special_function */ |
| 599 | "R_ARM_ALU_SBREL_19_12",/* name */ |
| 600 | FALSE, /* partial_inplace */ |
| 601 | 0x000ff000, /* src_mask */ |
| 602 | 0x000ff000, /* dst_mask */ |
| 603 | FALSE), /* pcrel_offset */ |
| 604 | |
| 605 | HOWTO (R_ARM_ALU_SBREL_27_20, /* type */ |
| 606 | 0, /* rightshift */ |
| 607 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 608 | 8, /* bitsize */ |
| 609 | FALSE, /* pc_relative */ |
| 610 | 20, /* bitpos */ |
| 611 | complain_overflow_dont,/* complain_on_overflow */ |
| 612 | bfd_elf_generic_reloc, /* special_function */ |
| 613 | "R_ARM_ALU_SBREL_27_20",/* name */ |
| 614 | FALSE, /* partial_inplace */ |
| 615 | 0x0ff00000, /* src_mask */ |
| 616 | 0x0ff00000, /* dst_mask */ |
| 617 | FALSE), /* pcrel_offset */ |
| 618 | |
| 619 | HOWTO (R_ARM_TARGET1, /* type */ |
| 620 | 0, /* rightshift */ |
| 621 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 622 | 32, /* bitsize */ |
| 623 | FALSE, /* pc_relative */ |
| 624 | 0, /* bitpos */ |
| 625 | complain_overflow_dont,/* complain_on_overflow */ |
| 626 | bfd_elf_generic_reloc, /* special_function */ |
| 627 | "R_ARM_TARGET1", /* name */ |
| 628 | FALSE, /* partial_inplace */ |
| 629 | 0xffffffff, /* src_mask */ |
| 630 | 0xffffffff, /* dst_mask */ |
| 631 | FALSE), /* pcrel_offset */ |
| 632 | |
| 633 | HOWTO (R_ARM_ROSEGREL32, /* type */ |
| 634 | 0, /* rightshift */ |
| 635 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 636 | 32, /* bitsize */ |
| 637 | FALSE, /* pc_relative */ |
| 638 | 0, /* bitpos */ |
| 639 | complain_overflow_dont,/* complain_on_overflow */ |
| 640 | bfd_elf_generic_reloc, /* special_function */ |
| 641 | "R_ARM_ROSEGREL32", /* name */ |
| 642 | FALSE, /* partial_inplace */ |
| 643 | 0xffffffff, /* src_mask */ |
| 644 | 0xffffffff, /* dst_mask */ |
| 645 | FALSE), /* pcrel_offset */ |
| 646 | |
| 647 | HOWTO (R_ARM_V4BX, /* type */ |
| 648 | 0, /* rightshift */ |
| 649 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 650 | 32, /* bitsize */ |
| 651 | FALSE, /* pc_relative */ |
| 652 | 0, /* bitpos */ |
| 653 | complain_overflow_dont,/* complain_on_overflow */ |
| 654 | bfd_elf_generic_reloc, /* special_function */ |
| 655 | "R_ARM_V4BX", /* name */ |
| 656 | FALSE, /* partial_inplace */ |
| 657 | 0xffffffff, /* src_mask */ |
| 658 | 0xffffffff, /* dst_mask */ |
| 659 | FALSE), /* pcrel_offset */ |
| 660 | |
| 661 | HOWTO (R_ARM_TARGET2, /* type */ |
| 662 | 0, /* rightshift */ |
| 663 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 664 | 32, /* bitsize */ |
| 665 | FALSE, /* pc_relative */ |
| 666 | 0, /* bitpos */ |
| 667 | complain_overflow_signed,/* complain_on_overflow */ |
| 668 | bfd_elf_generic_reloc, /* special_function */ |
| 669 | "R_ARM_TARGET2", /* name */ |
| 670 | FALSE, /* partial_inplace */ |
| 671 | 0xffffffff, /* src_mask */ |
| 672 | 0xffffffff, /* dst_mask */ |
| 673 | TRUE), /* pcrel_offset */ |
| 674 | |
| 675 | HOWTO (R_ARM_PREL31, /* type */ |
| 676 | 0, /* rightshift */ |
| 677 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 678 | 31, /* bitsize */ |
| 679 | TRUE, /* pc_relative */ |
| 680 | 0, /* bitpos */ |
| 681 | complain_overflow_signed,/* complain_on_overflow */ |
| 682 | bfd_elf_generic_reloc, /* special_function */ |
| 683 | "R_ARM_PREL31", /* name */ |
| 684 | FALSE, /* partial_inplace */ |
| 685 | 0x7fffffff, /* src_mask */ |
| 686 | 0x7fffffff, /* dst_mask */ |
| 687 | TRUE), /* pcrel_offset */ |
| 688 | |
| 689 | HOWTO (R_ARM_MOVW_ABS_NC, /* type */ |
| 690 | 0, /* rightshift */ |
| 691 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 692 | 16, /* bitsize */ |
| 693 | FALSE, /* pc_relative */ |
| 694 | 0, /* bitpos */ |
| 695 | complain_overflow_dont,/* complain_on_overflow */ |
| 696 | bfd_elf_generic_reloc, /* special_function */ |
| 697 | "R_ARM_MOVW_ABS_NC", /* name */ |
| 698 | FALSE, /* partial_inplace */ |
| 699 | 0x0000ffff, /* src_mask */ |
| 700 | 0x0000ffff, /* dst_mask */ |
| 701 | FALSE), /* pcrel_offset */ |
| 702 | |
| 703 | HOWTO (R_ARM_MOVT_ABS, /* type */ |
| 704 | 0, /* rightshift */ |
| 705 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 706 | 16, /* bitsize */ |
| 707 | FALSE, /* pc_relative */ |
| 708 | 0, /* bitpos */ |
| 709 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 710 | bfd_elf_generic_reloc, /* special_function */ |
| 711 | "R_ARM_MOVT_ABS", /* name */ |
| 712 | FALSE, /* partial_inplace */ |
| 713 | 0x0000ffff, /* src_mask */ |
| 714 | 0x0000ffff, /* dst_mask */ |
| 715 | FALSE), /* pcrel_offset */ |
| 716 | |
| 717 | HOWTO (R_ARM_MOVW_PREL_NC, /* type */ |
| 718 | 0, /* rightshift */ |
| 719 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 720 | 16, /* bitsize */ |
| 721 | TRUE, /* pc_relative */ |
| 722 | 0, /* bitpos */ |
| 723 | complain_overflow_dont,/* complain_on_overflow */ |
| 724 | bfd_elf_generic_reloc, /* special_function */ |
| 725 | "R_ARM_MOVW_PREL_NC", /* name */ |
| 726 | FALSE, /* partial_inplace */ |
| 727 | 0x0000ffff, /* src_mask */ |
| 728 | 0x0000ffff, /* dst_mask */ |
| 729 | TRUE), /* pcrel_offset */ |
| 730 | |
| 731 | HOWTO (R_ARM_MOVT_PREL, /* type */ |
| 732 | 0, /* rightshift */ |
| 733 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 734 | 16, /* bitsize */ |
| 735 | TRUE, /* pc_relative */ |
| 736 | 0, /* bitpos */ |
| 737 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 738 | bfd_elf_generic_reloc, /* special_function */ |
| 739 | "R_ARM_MOVT_PREL", /* name */ |
| 740 | FALSE, /* partial_inplace */ |
| 741 | 0x0000ffff, /* src_mask */ |
| 742 | 0x0000ffff, /* dst_mask */ |
| 743 | TRUE), /* pcrel_offset */ |
| 744 | |
| 745 | HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */ |
| 746 | 0, /* rightshift */ |
| 747 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 748 | 16, /* bitsize */ |
| 749 | FALSE, /* pc_relative */ |
| 750 | 0, /* bitpos */ |
| 751 | complain_overflow_dont,/* complain_on_overflow */ |
| 752 | bfd_elf_generic_reloc, /* special_function */ |
| 753 | "R_ARM_THM_MOVW_ABS_NC",/* name */ |
| 754 | FALSE, /* partial_inplace */ |
| 755 | 0x040f70ff, /* src_mask */ |
| 756 | 0x040f70ff, /* dst_mask */ |
| 757 | FALSE), /* pcrel_offset */ |
| 758 | |
| 759 | HOWTO (R_ARM_THM_MOVT_ABS, /* type */ |
| 760 | 0, /* rightshift */ |
| 761 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 762 | 16, /* bitsize */ |
| 763 | FALSE, /* pc_relative */ |
| 764 | 0, /* bitpos */ |
| 765 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 766 | bfd_elf_generic_reloc, /* special_function */ |
| 767 | "R_ARM_THM_MOVT_ABS", /* name */ |
| 768 | FALSE, /* partial_inplace */ |
| 769 | 0x040f70ff, /* src_mask */ |
| 770 | 0x040f70ff, /* dst_mask */ |
| 771 | FALSE), /* pcrel_offset */ |
| 772 | |
| 773 | HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */ |
| 774 | 0, /* rightshift */ |
| 775 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 776 | 16, /* bitsize */ |
| 777 | TRUE, /* pc_relative */ |
| 778 | 0, /* bitpos */ |
| 779 | complain_overflow_dont,/* complain_on_overflow */ |
| 780 | bfd_elf_generic_reloc, /* special_function */ |
| 781 | "R_ARM_THM_MOVW_PREL_NC",/* name */ |
| 782 | FALSE, /* partial_inplace */ |
| 783 | 0x040f70ff, /* src_mask */ |
| 784 | 0x040f70ff, /* dst_mask */ |
| 785 | TRUE), /* pcrel_offset */ |
| 786 | |
| 787 | HOWTO (R_ARM_THM_MOVT_PREL, /* type */ |
| 788 | 0, /* rightshift */ |
| 789 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 790 | 16, /* bitsize */ |
| 791 | TRUE, /* pc_relative */ |
| 792 | 0, /* bitpos */ |
| 793 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 794 | bfd_elf_generic_reloc, /* special_function */ |
| 795 | "R_ARM_THM_MOVT_PREL", /* name */ |
| 796 | FALSE, /* partial_inplace */ |
| 797 | 0x040f70ff, /* src_mask */ |
| 798 | 0x040f70ff, /* dst_mask */ |
| 799 | TRUE), /* pcrel_offset */ |
| 800 | |
| 801 | HOWTO (R_ARM_THM_JUMP19, /* type */ |
| 802 | 1, /* rightshift */ |
| 803 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 804 | 19, /* bitsize */ |
| 805 | TRUE, /* pc_relative */ |
| 806 | 0, /* bitpos */ |
| 807 | complain_overflow_signed,/* complain_on_overflow */ |
| 808 | bfd_elf_generic_reloc, /* special_function */ |
| 809 | "R_ARM_THM_JUMP19", /* name */ |
| 810 | FALSE, /* partial_inplace */ |
| 811 | 0x043f2fff, /* src_mask */ |
| 812 | 0x043f2fff, /* dst_mask */ |
| 813 | TRUE), /* pcrel_offset */ |
| 814 | |
| 815 | HOWTO (R_ARM_THM_JUMP6, /* type */ |
| 816 | 1, /* rightshift */ |
| 817 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 818 | 6, /* bitsize */ |
| 819 | TRUE, /* pc_relative */ |
| 820 | 0, /* bitpos */ |
| 821 | complain_overflow_unsigned,/* complain_on_overflow */ |
| 822 | bfd_elf_generic_reloc, /* special_function */ |
| 823 | "R_ARM_THM_JUMP6", /* name */ |
| 824 | FALSE, /* partial_inplace */ |
| 825 | 0x02f8, /* src_mask */ |
| 826 | 0x02f8, /* dst_mask */ |
| 827 | TRUE), /* pcrel_offset */ |
| 828 | |
| 829 | /* These are declared as 13-bit signed relocations because we can |
| 830 | address -4095 .. 4095(base) by altering ADDW to SUBW or vice |
| 831 | versa. */ |
| 832 | HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */ |
| 833 | 0, /* rightshift */ |
| 834 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 835 | 13, /* bitsize */ |
| 836 | TRUE, /* pc_relative */ |
| 837 | 0, /* bitpos */ |
| 838 | complain_overflow_signed,/* complain_on_overflow */ |
| 839 | bfd_elf_generic_reloc, /* special_function */ |
| 840 | "R_ARM_THM_ALU_PREL_11_0",/* name */ |
| 841 | FALSE, /* partial_inplace */ |
| 842 | 0x040070ff, /* src_mask */ |
| 843 | 0x040070ff, /* dst_mask */ |
| 844 | TRUE), /* pcrel_offset */ |
| 845 | |
| 846 | HOWTO (R_ARM_THM_PC12, /* type */ |
| 847 | 0, /* rightshift */ |
| 848 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 849 | 13, /* bitsize */ |
| 850 | TRUE, /* pc_relative */ |
| 851 | 0, /* bitpos */ |
| 852 | complain_overflow_signed,/* complain_on_overflow */ |
| 853 | bfd_elf_generic_reloc, /* special_function */ |
| 854 | "R_ARM_THM_PC12", /* name */ |
| 855 | FALSE, /* partial_inplace */ |
| 856 | 0x040070ff, /* src_mask */ |
| 857 | 0x040070ff, /* dst_mask */ |
| 858 | TRUE), /* pcrel_offset */ |
| 859 | |
| 860 | HOWTO (R_ARM_ABS32_NOI, /* type */ |
| 861 | 0, /* rightshift */ |
| 862 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 863 | 32, /* bitsize */ |
| 864 | FALSE, /* pc_relative */ |
| 865 | 0, /* bitpos */ |
| 866 | complain_overflow_dont,/* complain_on_overflow */ |
| 867 | bfd_elf_generic_reloc, /* special_function */ |
| 868 | "R_ARM_ABS32_NOI", /* name */ |
| 869 | FALSE, /* partial_inplace */ |
| 870 | 0xffffffff, /* src_mask */ |
| 871 | 0xffffffff, /* dst_mask */ |
| 872 | FALSE), /* pcrel_offset */ |
| 873 | |
| 874 | HOWTO (R_ARM_REL32_NOI, /* type */ |
| 875 | 0, /* rightshift */ |
| 876 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 877 | 32, /* bitsize */ |
| 878 | TRUE, /* pc_relative */ |
| 879 | 0, /* bitpos */ |
| 880 | complain_overflow_dont,/* complain_on_overflow */ |
| 881 | bfd_elf_generic_reloc, /* special_function */ |
| 882 | "R_ARM_REL32_NOI", /* name */ |
| 883 | FALSE, /* partial_inplace */ |
| 884 | 0xffffffff, /* src_mask */ |
| 885 | 0xffffffff, /* dst_mask */ |
| 886 | FALSE), /* pcrel_offset */ |
| 887 | }; |
| 888 | |
| 889 | /* Relocations 57 .. 83 are the "group relocations" which we do not |
| 890 | support. */ |
| 891 | |
| 892 | static reloc_howto_type elf32_arm_howto_table_2[] = |
| 893 | { |
| 894 | HOWTO (R_ARM_MOVW_BREL_NC, /* type */ |
| 895 | 0, /* rightshift */ |
| 896 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 897 | 16, /* bitsize */ |
| 898 | FALSE, /* pc_relative */ |
| 899 | 0, /* bitpos */ |
| 900 | complain_overflow_dont,/* complain_on_overflow */ |
| 901 | bfd_elf_generic_reloc, /* special_function */ |
| 902 | "R_ARM_MOVW_BREL_NC", /* name */ |
| 903 | FALSE, /* partial_inplace */ |
| 904 | 0x0000ffff, /* src_mask */ |
| 905 | 0x0000ffff, /* dst_mask */ |
| 906 | FALSE), /* pcrel_offset */ |
| 907 | |
| 908 | HOWTO (R_ARM_MOVT_BREL, /* type */ |
| 909 | 0, /* rightshift */ |
| 910 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 911 | 16, /* bitsize */ |
| 912 | FALSE, /* pc_relative */ |
| 913 | 0, /* bitpos */ |
| 914 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 915 | bfd_elf_generic_reloc, /* special_function */ |
| 916 | "R_ARM_MOVT_BREL", /* name */ |
| 917 | FALSE, /* partial_inplace */ |
| 918 | 0x0000ffff, /* src_mask */ |
| 919 | 0x0000ffff, /* dst_mask */ |
| 920 | FALSE), /* pcrel_offset */ |
| 921 | |
| 922 | HOWTO (R_ARM_MOVW_BREL, /* type */ |
| 923 | 0, /* rightshift */ |
| 924 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 925 | 16, /* bitsize */ |
| 926 | FALSE, /* pc_relative */ |
| 927 | 0, /* bitpos */ |
| 928 | complain_overflow_dont,/* complain_on_overflow */ |
| 929 | bfd_elf_generic_reloc, /* special_function */ |
| 930 | "R_ARM_MOVW_BREL", /* name */ |
| 931 | FALSE, /* partial_inplace */ |
| 932 | 0x0000ffff, /* src_mask */ |
| 933 | 0x0000ffff, /* dst_mask */ |
| 934 | FALSE), /* pcrel_offset */ |
| 935 | |
| 936 | HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */ |
| 937 | 0, /* rightshift */ |
| 938 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 939 | 16, /* bitsize */ |
| 940 | FALSE, /* pc_relative */ |
| 941 | 0, /* bitpos */ |
| 942 | complain_overflow_dont,/* complain_on_overflow */ |
| 943 | bfd_elf_generic_reloc, /* special_function */ |
| 944 | "R_ARM_THM_MOVW_BREL_NC",/* name */ |
| 945 | FALSE, /* partial_inplace */ |
| 946 | 0x040f70ff, /* src_mask */ |
| 947 | 0x040f70ff, /* dst_mask */ |
| 948 | FALSE), /* pcrel_offset */ |
| 949 | |
| 950 | HOWTO (R_ARM_THM_MOVT_BREL, /* type */ |
| 951 | 0, /* rightshift */ |
| 952 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 953 | 16, /* bitsize */ |
| 954 | FALSE, /* pc_relative */ |
| 955 | 0, /* bitpos */ |
| 956 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 957 | bfd_elf_generic_reloc, /* special_function */ |
| 958 | "R_ARM_THM_MOVT_BREL", /* name */ |
| 959 | FALSE, /* partial_inplace */ |
| 960 | 0x040f70ff, /* src_mask */ |
| 961 | 0x040f70ff, /* dst_mask */ |
| 962 | FALSE), /* pcrel_offset */ |
| 963 | |
| 964 | HOWTO (R_ARM_THM_MOVW_BREL, /* type */ |
| 965 | 0, /* rightshift */ |
| 966 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 967 | 16, /* bitsize */ |
| 968 | FALSE, /* pc_relative */ |
| 969 | 0, /* bitpos */ |
| 970 | complain_overflow_dont,/* complain_on_overflow */ |
| 971 | bfd_elf_generic_reloc, /* special_function */ |
| 972 | "R_ARM_THM_MOVW_BREL", /* name */ |
| 973 | FALSE, /* partial_inplace */ |
| 974 | 0x040f70ff, /* src_mask */ |
| 975 | 0x040f70ff, /* dst_mask */ |
| 976 | FALSE), /* pcrel_offset */ |
| 977 | |
| 978 | EMPTY_HOWTO (90), /* unallocated */ |
| 979 | EMPTY_HOWTO (91), |
| 980 | EMPTY_HOWTO (92), |
| 981 | EMPTY_HOWTO (93), |
| 982 | |
| 983 | HOWTO (R_ARM_PLT32_ABS, /* type */ |
| 984 | 0, /* rightshift */ |
| 985 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 986 | 32, /* bitsize */ |
| 987 | FALSE, /* pc_relative */ |
| 988 | 0, /* bitpos */ |
| 989 | complain_overflow_dont,/* complain_on_overflow */ |
| 990 | bfd_elf_generic_reloc, /* special_function */ |
| 991 | "R_ARM_PLT32_ABS", /* name */ |
| 992 | FALSE, /* partial_inplace */ |
| 993 | 0xffffffff, /* src_mask */ |
| 994 | 0xffffffff, /* dst_mask */ |
| 995 | FALSE), /* pcrel_offset */ |
| 996 | |
| 997 | HOWTO (R_ARM_GOT_ABS, /* type */ |
| 998 | 0, /* rightshift */ |
| 999 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1000 | 32, /* bitsize */ |
| 1001 | FALSE, /* pc_relative */ |
| 1002 | 0, /* bitpos */ |
| 1003 | complain_overflow_dont,/* complain_on_overflow */ |
| 1004 | bfd_elf_generic_reloc, /* special_function */ |
| 1005 | "R_ARM_GOT_ABS", /* name */ |
| 1006 | FALSE, /* partial_inplace */ |
| 1007 | 0xffffffff, /* src_mask */ |
| 1008 | 0xffffffff, /* dst_mask */ |
| 1009 | FALSE), /* pcrel_offset */ |
| 1010 | |
| 1011 | HOWTO (R_ARM_GOT_PREL, /* type */ |
| 1012 | 0, /* rightshift */ |
| 1013 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1014 | 32, /* bitsize */ |
| 1015 | TRUE, /* pc_relative */ |
| 1016 | 0, /* bitpos */ |
| 1017 | complain_overflow_dont, /* complain_on_overflow */ |
| 1018 | bfd_elf_generic_reloc, /* special_function */ |
| 1019 | "R_ARM_GOT_PREL", /* name */ |
| 1020 | FALSE, /* partial_inplace */ |
| 1021 | 0xffffffff, /* src_mask */ |
| 1022 | 0xffffffff, /* dst_mask */ |
| 1023 | TRUE), /* pcrel_offset */ |
| 1024 | |
| 1025 | HOWTO (R_ARM_GOT_BREL12, /* type */ |
| 1026 | 0, /* rightshift */ |
| 1027 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1028 | 12, /* bitsize */ |
| 1029 | FALSE, /* pc_relative */ |
| 1030 | 0, /* bitpos */ |
| 1031 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1032 | bfd_elf_generic_reloc, /* special_function */ |
| 1033 | "R_ARM_GOT_BREL12", /* name */ |
| 1034 | FALSE, /* partial_inplace */ |
| 1035 | 0x00000fff, /* src_mask */ |
| 1036 | 0x00000fff, /* dst_mask */ |
| 1037 | FALSE), /* pcrel_offset */ |
| 1038 | |
| 1039 | HOWTO (R_ARM_GOTOFF12, /* type */ |
| 1040 | 0, /* rightshift */ |
| 1041 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1042 | 12, /* bitsize */ |
| 1043 | FALSE, /* pc_relative */ |
| 1044 | 0, /* bitpos */ |
| 1045 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1046 | bfd_elf_generic_reloc, /* special_function */ |
| 1047 | "R_ARM_GOTOFF12", /* name */ |
| 1048 | FALSE, /* partial_inplace */ |
| 1049 | 0x00000fff, /* src_mask */ |
| 1050 | 0x00000fff, /* dst_mask */ |
| 1051 | FALSE), /* pcrel_offset */ |
| 1052 | |
| 1053 | EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */ |
| 1054 | |
| 1055 | /* GNU extension to record C++ vtable member usage */ |
| 1056 | HOWTO (R_ARM_GNU_VTENTRY, /* type */ |
| 1057 | 0, /* rightshift */ |
| 1058 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1059 | 0, /* bitsize */ |
| 1060 | FALSE, /* pc_relative */ |
| 1061 | 0, /* bitpos */ |
| 1062 | complain_overflow_dont, /* complain_on_overflow */ |
| 1063 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 1064 | "R_ARM_GNU_VTENTRY", /* name */ |
| 1065 | FALSE, /* partial_inplace */ |
| 1066 | 0, /* src_mask */ |
| 1067 | 0, /* dst_mask */ |
| 1068 | FALSE), /* pcrel_offset */ |
| 1069 | |
| 1070 | /* GNU extension to record C++ vtable hierarchy */ |
| 1071 | HOWTO (R_ARM_GNU_VTINHERIT, /* type */ |
| 1072 | 0, /* rightshift */ |
| 1073 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1074 | 0, /* bitsize */ |
| 1075 | FALSE, /* pc_relative */ |
| 1076 | 0, /* bitpos */ |
| 1077 | complain_overflow_dont, /* complain_on_overflow */ |
| 1078 | NULL, /* special_function */ |
| 1079 | "R_ARM_GNU_VTINHERIT", /* name */ |
| 1080 | FALSE, /* partial_inplace */ |
| 1081 | 0, /* src_mask */ |
| 1082 | 0, /* dst_mask */ |
| 1083 | FALSE), /* pcrel_offset */ |
| 1084 | |
| 1085 | HOWTO (R_ARM_THM_JUMP11, /* type */ |
| 1086 | 1, /* rightshift */ |
| 1087 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1088 | 11, /* bitsize */ |
| 1089 | TRUE, /* pc_relative */ |
| 1090 | 0, /* bitpos */ |
| 1091 | complain_overflow_signed, /* complain_on_overflow */ |
| 1092 | bfd_elf_generic_reloc, /* special_function */ |
| 1093 | "R_ARM_THM_JUMP11", /* name */ |
| 1094 | FALSE, /* partial_inplace */ |
| 1095 | 0x000007ff, /* src_mask */ |
| 1096 | 0x000007ff, /* dst_mask */ |
| 1097 | TRUE), /* pcrel_offset */ |
| 1098 | |
| 1099 | HOWTO (R_ARM_THM_JUMP8, /* type */ |
| 1100 | 1, /* rightshift */ |
| 1101 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1102 | 8, /* bitsize */ |
| 1103 | TRUE, /* pc_relative */ |
| 1104 | 0, /* bitpos */ |
| 1105 | complain_overflow_signed, /* complain_on_overflow */ |
| 1106 | bfd_elf_generic_reloc, /* special_function */ |
| 1107 | "R_ARM_THM_JUMP8", /* name */ |
| 1108 | FALSE, /* partial_inplace */ |
| 1109 | 0x000000ff, /* src_mask */ |
| 1110 | 0x000000ff, /* dst_mask */ |
| 1111 | TRUE), /* pcrel_offset */ |
| 1112 | |
| 1113 | /* TLS relocations */ |
| 1114 | HOWTO (R_ARM_TLS_GD32, /* type */ |
| 1115 | 0, /* rightshift */ |
| 1116 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1117 | 32, /* bitsize */ |
| 1118 | FALSE, /* pc_relative */ |
| 1119 | 0, /* bitpos */ |
| 1120 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1121 | NULL, /* special_function */ |
| 1122 | "R_ARM_TLS_GD32", /* name */ |
| 1123 | TRUE, /* partial_inplace */ |
| 1124 | 0xffffffff, /* src_mask */ |
| 1125 | 0xffffffff, /* dst_mask */ |
| 1126 | FALSE), /* pcrel_offset */ |
| 1127 | |
| 1128 | HOWTO (R_ARM_TLS_LDM32, /* type */ |
| 1129 | 0, /* rightshift */ |
| 1130 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1131 | 32, /* bitsize */ |
| 1132 | FALSE, /* pc_relative */ |
| 1133 | 0, /* bitpos */ |
| 1134 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1135 | bfd_elf_generic_reloc, /* special_function */ |
| 1136 | "R_ARM_TLS_LDM32", /* name */ |
| 1137 | TRUE, /* partial_inplace */ |
| 1138 | 0xffffffff, /* src_mask */ |
| 1139 | 0xffffffff, /* dst_mask */ |
| 1140 | FALSE), /* pcrel_offset */ |
| 1141 | |
| 1142 | HOWTO (R_ARM_TLS_LDO32, /* type */ |
| 1143 | 0, /* rightshift */ |
| 1144 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1145 | 32, /* bitsize */ |
| 1146 | FALSE, /* pc_relative */ |
| 1147 | 0, /* bitpos */ |
| 1148 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1149 | bfd_elf_generic_reloc, /* special_function */ |
| 1150 | "R_ARM_TLS_LDO32", /* name */ |
| 1151 | TRUE, /* partial_inplace */ |
| 1152 | 0xffffffff, /* src_mask */ |
| 1153 | 0xffffffff, /* dst_mask */ |
| 1154 | FALSE), /* pcrel_offset */ |
| 1155 | |
| 1156 | HOWTO (R_ARM_TLS_IE32, /* type */ |
| 1157 | 0, /* rightshift */ |
| 1158 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1159 | 32, /* bitsize */ |
| 1160 | FALSE, /* pc_relative */ |
| 1161 | 0, /* bitpos */ |
| 1162 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1163 | NULL, /* special_function */ |
| 1164 | "R_ARM_TLS_IE32", /* name */ |
| 1165 | TRUE, /* partial_inplace */ |
| 1166 | 0xffffffff, /* src_mask */ |
| 1167 | 0xffffffff, /* dst_mask */ |
| 1168 | FALSE), /* pcrel_offset */ |
| 1169 | |
| 1170 | HOWTO (R_ARM_TLS_LE32, /* type */ |
| 1171 | 0, /* rightshift */ |
| 1172 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1173 | 32, /* bitsize */ |
| 1174 | FALSE, /* pc_relative */ |
| 1175 | 0, /* bitpos */ |
| 1176 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1177 | bfd_elf_generic_reloc, /* special_function */ |
| 1178 | "R_ARM_TLS_LE32", /* name */ |
| 1179 | TRUE, /* partial_inplace */ |
| 1180 | 0xffffffff, /* src_mask */ |
| 1181 | 0xffffffff, /* dst_mask */ |
| 1182 | FALSE), /* pcrel_offset */ |
| 1183 | |
| 1184 | HOWTO (R_ARM_TLS_LDO12, /* type */ |
| 1185 | 0, /* rightshift */ |
| 1186 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1187 | 12, /* bitsize */ |
| 1188 | FALSE, /* pc_relative */ |
| 1189 | 0, /* bitpos */ |
| 1190 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1191 | bfd_elf_generic_reloc, /* special_function */ |
| 1192 | "R_ARM_TLS_LDO12", /* name */ |
| 1193 | FALSE, /* partial_inplace */ |
| 1194 | 0x00000fff, /* src_mask */ |
| 1195 | 0x00000fff, /* dst_mask */ |
| 1196 | FALSE), /* pcrel_offset */ |
| 1197 | |
| 1198 | HOWTO (R_ARM_TLS_LE12, /* type */ |
| 1199 | 0, /* rightshift */ |
| 1200 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1201 | 12, /* bitsize */ |
| 1202 | FALSE, /* pc_relative */ |
| 1203 | 0, /* bitpos */ |
| 1204 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1205 | bfd_elf_generic_reloc, /* special_function */ |
| 1206 | "R_ARM_TLS_LE12", /* name */ |
| 1207 | FALSE, /* partial_inplace */ |
| 1208 | 0x00000fff, /* src_mask */ |
| 1209 | 0x00000fff, /* dst_mask */ |
| 1210 | FALSE), /* pcrel_offset */ |
| 1211 | |
| 1212 | HOWTO (R_ARM_TLS_IE12GP, /* type */ |
| 1213 | 0, /* rightshift */ |
| 1214 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1215 | 12, /* bitsize */ |
| 1216 | FALSE, /* pc_relative */ |
| 1217 | 0, /* bitpos */ |
| 1218 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1219 | bfd_elf_generic_reloc, /* special_function */ |
| 1220 | "R_ARM_TLS_IE12GP", /* name */ |
| 1221 | FALSE, /* partial_inplace */ |
| 1222 | 0x00000fff, /* src_mask */ |
| 1223 | 0x00000fff, /* dst_mask */ |
| 1224 | FALSE), /* pcrel_offset */ |
| 1225 | }; |
| 1226 | |
| 1227 | /* 112-127 private relocations |
| 1228 | 128 R_ARM_ME_TOO, obsolete |
| 1229 | 129-255 unallocated in AAELF. |
| 1230 | |
| 1231 | 249-255 extended, currently unused, relocations: */ |
| 1232 | |
| 1233 | static reloc_howto_type elf32_arm_howto_table_3[4] = |
| 1234 | { |
| 1235 | HOWTO (R_ARM_RREL32, /* type */ |
| 1236 | 0, /* rightshift */ |
| 1237 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1238 | 0, /* bitsize */ |
| 1239 | FALSE, /* pc_relative */ |
| 1240 | 0, /* bitpos */ |
| 1241 | complain_overflow_dont,/* complain_on_overflow */ |
| 1242 | bfd_elf_generic_reloc, /* special_function */ |
| 1243 | "R_ARM_RREL32", /* name */ |
| 1244 | FALSE, /* partial_inplace */ |
| 1245 | 0, /* src_mask */ |
| 1246 | 0, /* dst_mask */ |
| 1247 | FALSE), /* pcrel_offset */ |
| 1248 | |
| 1249 | HOWTO (R_ARM_RABS32, /* type */ |
| 1250 | 0, /* rightshift */ |
| 1251 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1252 | 0, /* bitsize */ |
| 1253 | FALSE, /* pc_relative */ |
| 1254 | 0, /* bitpos */ |
| 1255 | complain_overflow_dont,/* complain_on_overflow */ |
| 1256 | bfd_elf_generic_reloc, /* special_function */ |
| 1257 | "R_ARM_RABS32", /* name */ |
| 1258 | FALSE, /* partial_inplace */ |
| 1259 | 0, /* src_mask */ |
| 1260 | 0, /* dst_mask */ |
| 1261 | FALSE), /* pcrel_offset */ |
| 1262 | |
| 1263 | HOWTO (R_ARM_RPC24, /* 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 | bfd_elf_generic_reloc, /* special_function */ |
| 1271 | "R_ARM_RPC24", /* name */ |
| 1272 | FALSE, /* partial_inplace */ |
| 1273 | 0, /* src_mask */ |
| 1274 | 0, /* dst_mask */ |
| 1275 | FALSE), /* pcrel_offset */ |
| 1276 | |
| 1277 | HOWTO (R_ARM_RBASE, /* type */ |
| 1278 | 0, /* rightshift */ |
| 1279 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1280 | 0, /* bitsize */ |
| 1281 | FALSE, /* pc_relative */ |
| 1282 | 0, /* bitpos */ |
| 1283 | complain_overflow_dont,/* complain_on_overflow */ |
| 1284 | bfd_elf_generic_reloc, /* special_function */ |
| 1285 | "R_ARM_RBASE", /* name */ |
| 1286 | FALSE, /* partial_inplace */ |
| 1287 | 0, /* src_mask */ |
| 1288 | 0, /* dst_mask */ |
| 1289 | FALSE) /* pcrel_offset */ |
| 1290 | }; |
| 1291 | |
| 1292 | static reloc_howto_type * |
| 1293 | elf32_arm_howto_from_type (unsigned int r_type) |
| 1294 | { |
| 1295 | if (r_type < NUM_ELEM (elf32_arm_howto_table_1)) |
| 1296 | return &elf32_arm_howto_table_1[r_type]; |
| 1297 | |
| 1298 | if (r_type >= R_ARM_MOVW_BREL_NC |
| 1299 | && r_type < R_ARM_MOVW_BREL_NC + NUM_ELEM (elf32_arm_howto_table_2)) |
| 1300 | return &elf32_arm_howto_table_2[r_type - R_ARM_MOVW_BREL_NC]; |
| 1301 | |
| 1302 | if (r_type >= R_ARM_RREL32 |
| 1303 | && r_type < R_ARM_RREL32 + NUM_ELEM (elf32_arm_howto_table_2)) |
| 1304 | return &elf32_arm_howto_table_3[r_type - R_ARM_RREL32]; |
| 1305 | |
| 1306 | return NULL; |
| 1307 | } |
| 1308 | |
| 1309 | static void |
| 1310 | elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc, |
| 1311 | Elf_Internal_Rela * elf_reloc) |
| 1312 | { |
| 1313 | unsigned int r_type; |
| 1314 | |
| 1315 | r_type = ELF32_R_TYPE (elf_reloc->r_info); |
| 1316 | bfd_reloc->howto = elf32_arm_howto_from_type (r_type); |
| 1317 | } |
| 1318 | |
| 1319 | struct elf32_arm_reloc_map |
| 1320 | { |
| 1321 | bfd_reloc_code_real_type bfd_reloc_val; |
| 1322 | unsigned char elf_reloc_val; |
| 1323 | }; |
| 1324 | |
| 1325 | /* All entries in this list must also be present in elf32_arm_howto_table. */ |
| 1326 | static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = |
| 1327 | { |
| 1328 | {BFD_RELOC_NONE, R_ARM_NONE}, |
| 1329 | {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24}, |
| 1330 | {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL}, |
| 1331 | {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24}, |
| 1332 | {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25}, |
| 1333 | {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22}, |
| 1334 | {BFD_RELOC_32, R_ARM_ABS32}, |
| 1335 | {BFD_RELOC_32_PCREL, R_ARM_REL32}, |
| 1336 | {BFD_RELOC_8, R_ARM_ABS8}, |
| 1337 | {BFD_RELOC_16, R_ARM_ABS16}, |
| 1338 | {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12}, |
| 1339 | {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5}, |
| 1340 | {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24}, |
| 1341 | {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL}, |
| 1342 | {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11}, |
| 1343 | {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19}, |
| 1344 | {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8}, |
| 1345 | {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6}, |
| 1346 | {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT}, |
| 1347 | {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT}, |
| 1348 | {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE}, |
| 1349 | {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32}, |
| 1350 | {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC}, |
| 1351 | {BFD_RELOC_ARM_GOT32, R_ARM_GOT32}, |
| 1352 | {BFD_RELOC_ARM_PLT32, R_ARM_PLT32}, |
| 1353 | {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1}, |
| 1354 | {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32}, |
| 1355 | {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32}, |
| 1356 | {BFD_RELOC_ARM_PREL31, R_ARM_PREL31}, |
| 1357 | {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2}, |
| 1358 | {BFD_RELOC_ARM_PLT32, R_ARM_PLT32}, |
| 1359 | {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32}, |
| 1360 | {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32}, |
| 1361 | {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32}, |
| 1362 | {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32}, |
| 1363 | {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32}, |
| 1364 | {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32}, |
| 1365 | {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32}, |
| 1366 | {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32}, |
| 1367 | {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT}, |
| 1368 | {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY}, |
| 1369 | {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC}, |
| 1370 | {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS}, |
| 1371 | {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC}, |
| 1372 | {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL}, |
| 1373 | {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC}, |
| 1374 | {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS}, |
| 1375 | {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC}, |
| 1376 | {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL}, |
| 1377 | }; |
| 1378 | |
| 1379 | static reloc_howto_type * |
| 1380 | elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1381 | bfd_reloc_code_real_type code) |
| 1382 | { |
| 1383 | unsigned int i; |
| 1384 | for (i = 0; i < NUM_ELEM (elf32_arm_reloc_map); i ++) |
| 1385 | if (elf32_arm_reloc_map[i].bfd_reloc_val == code) |
| 1386 | return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val); |
| 1387 | |
| 1388 | return NULL; |
| 1389 | } |
| 1390 | |
| 1391 | /* Support for core dump NOTE sections */ |
| 1392 | static bfd_boolean |
| 1393 | elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 1394 | { |
| 1395 | int offset; |
| 1396 | size_t size; |
| 1397 | |
| 1398 | switch (note->descsz) |
| 1399 | { |
| 1400 | default: |
| 1401 | return FALSE; |
| 1402 | |
| 1403 | case 148: /* Linux/ARM 32-bit*/ |
| 1404 | /* pr_cursig */ |
| 1405 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); |
| 1406 | |
| 1407 | /* pr_pid */ |
| 1408 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); |
| 1409 | |
| 1410 | /* pr_reg */ |
| 1411 | offset = 72; |
| 1412 | size = 72; |
| 1413 | |
| 1414 | break; |
| 1415 | } |
| 1416 | |
| 1417 | /* Make a ".reg/999" section. */ |
| 1418 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 1419 | size, note->descpos + offset); |
| 1420 | } |
| 1421 | |
| 1422 | static bfd_boolean |
| 1423 | elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 1424 | { |
| 1425 | switch (note->descsz) |
| 1426 | { |
| 1427 | default: |
| 1428 | return FALSE; |
| 1429 | |
| 1430 | case 124: /* Linux/ARM elf_prpsinfo */ |
| 1431 | elf_tdata (abfd)->core_program |
| 1432 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| 1433 | elf_tdata (abfd)->core_command |
| 1434 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| 1435 | } |
| 1436 | |
| 1437 | /* Note that for some reason, a spurious space is tacked |
| 1438 | onto the end of the args in some (at least one anyway) |
| 1439 | implementations, so strip it off if it exists. */ |
| 1440 | |
| 1441 | { |
| 1442 | char *command = elf_tdata (abfd)->core_command; |
| 1443 | int n = strlen (command); |
| 1444 | |
| 1445 | if (0 < n && command[n - 1] == ' ') |
| 1446 | command[n - 1] = '\0'; |
| 1447 | } |
| 1448 | |
| 1449 | return TRUE; |
| 1450 | } |
| 1451 | |
| 1452 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec |
| 1453 | #define TARGET_LITTLE_NAME "elf32-littlearm" |
| 1454 | #define TARGET_BIG_SYM bfd_elf32_bigarm_vec |
| 1455 | #define TARGET_BIG_NAME "elf32-bigarm" |
| 1456 | |
| 1457 | #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus |
| 1458 | #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo |
| 1459 | |
| 1460 | typedef unsigned long int insn32; |
| 1461 | typedef unsigned short int insn16; |
| 1462 | |
| 1463 | /* In lieu of proper flags, assume all EABIv4 or later objects are |
| 1464 | interworkable. */ |
| 1465 | #define INTERWORK_FLAG(abfd) \ |
| 1466 | (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \ |
| 1467 | || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)) |
| 1468 | |
| 1469 | /* The linker script knows the section names for placement. |
| 1470 | The entry_names are used to do simple name mangling on the stubs. |
| 1471 | Given a function name, and its type, the stub can be found. The |
| 1472 | name can be changed. The only requirement is the %s be present. */ |
| 1473 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" |
| 1474 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" |
| 1475 | |
| 1476 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" |
| 1477 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" |
| 1478 | |
| 1479 | /* The name of the dynamic interpreter. This is put in the .interp |
| 1480 | section. */ |
| 1481 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 1482 | |
| 1483 | #ifdef FOUR_WORD_PLT |
| 1484 | |
| 1485 | /* The first entry in a procedure linkage table looks like |
| 1486 | this. It is set up so that any shared library function that is |
| 1487 | called before the relocation has been set up calls the dynamic |
| 1488 | linker first. */ |
| 1489 | static const bfd_vma elf32_arm_plt0_entry [] = |
| 1490 | { |
| 1491 | 0xe52de004, /* str lr, [sp, #-4]! */ |
| 1492 | 0xe59fe010, /* ldr lr, [pc, #16] */ |
| 1493 | 0xe08fe00e, /* add lr, pc, lr */ |
| 1494 | 0xe5bef008, /* ldr pc, [lr, #8]! */ |
| 1495 | }; |
| 1496 | |
| 1497 | /* Subsequent entries in a procedure linkage table look like |
| 1498 | this. */ |
| 1499 | static const bfd_vma elf32_arm_plt_entry [] = |
| 1500 | { |
| 1501 | 0xe28fc600, /* add ip, pc, #NN */ |
| 1502 | 0xe28cca00, /* add ip, ip, #NN */ |
| 1503 | 0xe5bcf000, /* ldr pc, [ip, #NN]! */ |
| 1504 | 0x00000000, /* unused */ |
| 1505 | }; |
| 1506 | |
| 1507 | #else |
| 1508 | |
| 1509 | /* The first entry in a procedure linkage table looks like |
| 1510 | this. It is set up so that any shared library function that is |
| 1511 | called before the relocation has been set up calls the dynamic |
| 1512 | linker first. */ |
| 1513 | static const bfd_vma elf32_arm_plt0_entry [] = |
| 1514 | { |
| 1515 | 0xe52de004, /* str lr, [sp, #-4]! */ |
| 1516 | 0xe59fe004, /* ldr lr, [pc, #4] */ |
| 1517 | 0xe08fe00e, /* add lr, pc, lr */ |
| 1518 | 0xe5bef008, /* ldr pc, [lr, #8]! */ |
| 1519 | 0x00000000, /* &GOT[0] - . */ |
| 1520 | }; |
| 1521 | |
| 1522 | /* Subsequent entries in a procedure linkage table look like |
| 1523 | this. */ |
| 1524 | static const bfd_vma elf32_arm_plt_entry [] = |
| 1525 | { |
| 1526 | 0xe28fc600, /* add ip, pc, #0xNN00000 */ |
| 1527 | 0xe28cca00, /* add ip, ip, #0xNN000 */ |
| 1528 | 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */ |
| 1529 | }; |
| 1530 | |
| 1531 | #endif |
| 1532 | |
| 1533 | /* The format of the first entry in the procedure linkage table |
| 1534 | for a VxWorks executable. */ |
| 1535 | static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] = |
| 1536 | { |
| 1537 | 0xe52dc008, /* str ip,[sp,#-8]! */ |
| 1538 | 0xe59fc000, /* ldr ip,[pc] */ |
| 1539 | 0xe59cf008, /* ldr pc,[ip,#8] */ |
| 1540 | 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */ |
| 1541 | }; |
| 1542 | |
| 1543 | /* The format of subsequent entries in a VxWorks executable. */ |
| 1544 | static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] = |
| 1545 | { |
| 1546 | 0xe59fc000, /* ldr ip,[pc] */ |
| 1547 | 0xe59cf000, /* ldr pc,[ip] */ |
| 1548 | 0x00000000, /* .long @got */ |
| 1549 | 0xe59fc000, /* ldr ip,[pc] */ |
| 1550 | 0xea000000, /* b _PLT */ |
| 1551 | 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */ |
| 1552 | }; |
| 1553 | |
| 1554 | /* The format of entries in a VxWorks shared library. */ |
| 1555 | static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] = |
| 1556 | { |
| 1557 | 0xe59fc000, /* ldr ip,[pc] */ |
| 1558 | 0xe79cf009, /* ldr pc,[ip,r9] */ |
| 1559 | 0x00000000, /* .long @got */ |
| 1560 | 0xe59fc000, /* ldr ip,[pc] */ |
| 1561 | 0xe599f008, /* ldr pc,[r9,#8] */ |
| 1562 | 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */ |
| 1563 | }; |
| 1564 | |
| 1565 | /* An initial stub used if the PLT entry is referenced from Thumb code. */ |
| 1566 | #define PLT_THUMB_STUB_SIZE 4 |
| 1567 | static const bfd_vma elf32_arm_plt_thumb_stub [] = |
| 1568 | { |
| 1569 | 0x4778, /* bx pc */ |
| 1570 | 0x46c0 /* nop */ |
| 1571 | }; |
| 1572 | |
| 1573 | /* The entries in a PLT when using a DLL-based target with multiple |
| 1574 | address spaces. */ |
| 1575 | static const bfd_vma elf32_arm_symbian_plt_entry [] = |
| 1576 | { |
| 1577 | 0xe51ff004, /* ldr pc, [pc, #-4] */ |
| 1578 | 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */ |
| 1579 | }; |
| 1580 | |
| 1581 | /* Used to build a map of a section. This is required for mixed-endian |
| 1582 | code/data. */ |
| 1583 | |
| 1584 | typedef struct elf32_elf_section_map |
| 1585 | { |
| 1586 | bfd_vma vma; |
| 1587 | char type; |
| 1588 | } |
| 1589 | elf32_arm_section_map; |
| 1590 | |
| 1591 | typedef struct _arm_elf_section_data |
| 1592 | { |
| 1593 | struct bfd_elf_section_data elf; |
| 1594 | unsigned int mapcount; |
| 1595 | elf32_arm_section_map *map; |
| 1596 | } |
| 1597 | _arm_elf_section_data; |
| 1598 | |
| 1599 | #define elf32_arm_section_data(sec) \ |
| 1600 | ((_arm_elf_section_data *) elf_section_data (sec)) |
| 1601 | |
| 1602 | /* The size of the thread control block. */ |
| 1603 | #define TCB_SIZE 8 |
| 1604 | |
| 1605 | #define NUM_KNOWN_ATTRIBUTES 32 |
| 1606 | |
| 1607 | typedef struct aeabi_attribute |
| 1608 | { |
| 1609 | int type; |
| 1610 | unsigned int i; |
| 1611 | char *s; |
| 1612 | } aeabi_attribute; |
| 1613 | |
| 1614 | typedef struct aeabi_attribute_list |
| 1615 | { |
| 1616 | struct aeabi_attribute_list *next; |
| 1617 | int tag; |
| 1618 | aeabi_attribute attr; |
| 1619 | } aeabi_attribute_list; |
| 1620 | |
| 1621 | struct elf32_arm_obj_tdata |
| 1622 | { |
| 1623 | struct elf_obj_tdata root; |
| 1624 | |
| 1625 | /* tls_type for each local got entry. */ |
| 1626 | char *local_got_tls_type; |
| 1627 | |
| 1628 | aeabi_attribute known_eabi_attributes[NUM_KNOWN_ATTRIBUTES]; |
| 1629 | aeabi_attribute_list *other_eabi_attributes; |
| 1630 | }; |
| 1631 | |
| 1632 | #define elf32_arm_tdata(abfd) \ |
| 1633 | ((struct elf32_arm_obj_tdata *) (abfd)->tdata.any) |
| 1634 | |
| 1635 | #define elf32_arm_local_got_tls_type(abfd) \ |
| 1636 | (elf32_arm_tdata (abfd)->local_got_tls_type) |
| 1637 | |
| 1638 | static bfd_boolean |
| 1639 | elf32_arm_mkobject (bfd *abfd) |
| 1640 | { |
| 1641 | bfd_size_type amt = sizeof (struct elf32_arm_obj_tdata); |
| 1642 | abfd->tdata.any = bfd_zalloc (abfd, amt); |
| 1643 | if (abfd->tdata.any == NULL) |
| 1644 | return FALSE; |
| 1645 | return TRUE; |
| 1646 | } |
| 1647 | |
| 1648 | /* The ARM linker needs to keep track of the number of relocs that it |
| 1649 | decides to copy in check_relocs for each symbol. This is so that |
| 1650 | it can discard PC relative relocs if it doesn't need them when |
| 1651 | linking with -Bsymbolic. We store the information in a field |
| 1652 | extending the regular ELF linker hash table. */ |
| 1653 | |
| 1654 | /* This structure keeps track of the number of relocs we have copied |
| 1655 | for a given symbol. */ |
| 1656 | struct elf32_arm_relocs_copied |
| 1657 | { |
| 1658 | /* Next section. */ |
| 1659 | struct elf32_arm_relocs_copied * next; |
| 1660 | /* A section in dynobj. */ |
| 1661 | asection * section; |
| 1662 | /* Number of relocs copied in this section. */ |
| 1663 | bfd_size_type count; |
| 1664 | /* Number of PC-relative relocs copied in this section. */ |
| 1665 | bfd_size_type pc_count; |
| 1666 | }; |
| 1667 | |
| 1668 | #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent)) |
| 1669 | |
| 1670 | /* Arm ELF linker hash entry. */ |
| 1671 | struct elf32_arm_link_hash_entry |
| 1672 | { |
| 1673 | struct elf_link_hash_entry root; |
| 1674 | |
| 1675 | /* Number of PC relative relocs copied for this symbol. */ |
| 1676 | struct elf32_arm_relocs_copied * relocs_copied; |
| 1677 | |
| 1678 | /* We reference count Thumb references to a PLT entry separately, |
| 1679 | so that we can emit the Thumb trampoline only if needed. */ |
| 1680 | bfd_signed_vma plt_thumb_refcount; |
| 1681 | |
| 1682 | /* Since PLT entries have variable size if the Thumb prologue is |
| 1683 | used, we need to record the index into .got.plt instead of |
| 1684 | recomputing it from the PLT offset. */ |
| 1685 | bfd_signed_vma plt_got_offset; |
| 1686 | |
| 1687 | #define GOT_UNKNOWN 0 |
| 1688 | #define GOT_NORMAL 1 |
| 1689 | #define GOT_TLS_GD 2 |
| 1690 | #define GOT_TLS_IE 4 |
| 1691 | unsigned char tls_type; |
| 1692 | }; |
| 1693 | |
| 1694 | /* Traverse an arm ELF linker hash table. */ |
| 1695 | #define elf32_arm_link_hash_traverse(table, func, info) \ |
| 1696 | (elf_link_hash_traverse \ |
| 1697 | (&(table)->root, \ |
| 1698 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ |
| 1699 | (info))) |
| 1700 | |
| 1701 | /* Get the ARM elf linker hash table from a link_info structure. */ |
| 1702 | #define elf32_arm_hash_table(info) \ |
| 1703 | ((struct elf32_arm_link_hash_table *) ((info)->hash)) |
| 1704 | |
| 1705 | /* ARM ELF linker hash table. */ |
| 1706 | struct elf32_arm_link_hash_table |
| 1707 | { |
| 1708 | /* The main hash table. */ |
| 1709 | struct elf_link_hash_table root; |
| 1710 | |
| 1711 | /* The size in bytes of the section containing the Thumb-to-ARM glue. */ |
| 1712 | bfd_size_type thumb_glue_size; |
| 1713 | |
| 1714 | /* The size in bytes of the section containing the ARM-to-Thumb glue. */ |
| 1715 | bfd_size_type arm_glue_size; |
| 1716 | |
| 1717 | /* An arbitrary input BFD chosen to hold the glue sections. */ |
| 1718 | bfd * bfd_of_glue_owner; |
| 1719 | |
| 1720 | /* Nonzero to output a BE8 image. */ |
| 1721 | int byteswap_code; |
| 1722 | |
| 1723 | /* Zero if R_ARM_TARGET1 means R_ARM_ABS32. |
| 1724 | Nonzero if R_ARM_TARGET1 means R_ARM_ABS32. */ |
| 1725 | int target1_is_rel; |
| 1726 | |
| 1727 | /* The relocation to use for R_ARM_TARGET2 relocations. */ |
| 1728 | int target2_reloc; |
| 1729 | |
| 1730 | /* Nonzero to fix BX instructions for ARMv4 targets. */ |
| 1731 | int fix_v4bx; |
| 1732 | |
| 1733 | /* Nonzero if the ARM/Thumb BLX instructions are available for use. */ |
| 1734 | int use_blx; |
| 1735 | |
| 1736 | /* The number of bytes in the initial entry in the PLT. */ |
| 1737 | bfd_size_type plt_header_size; |
| 1738 | |
| 1739 | /* The number of bytes in the subsequent PLT etries. */ |
| 1740 | bfd_size_type plt_entry_size; |
| 1741 | |
| 1742 | /* True if the target system is VxWorks. */ |
| 1743 | int vxworks_p; |
| 1744 | |
| 1745 | /* True if the target system is Symbian OS. */ |
| 1746 | int symbian_p; |
| 1747 | |
| 1748 | /* True if the target uses REL relocations. */ |
| 1749 | int use_rel; |
| 1750 | |
| 1751 | /* Short-cuts to get to dynamic linker sections. */ |
| 1752 | asection *sgot; |
| 1753 | asection *sgotplt; |
| 1754 | asection *srelgot; |
| 1755 | asection *splt; |
| 1756 | asection *srelplt; |
| 1757 | asection *sdynbss; |
| 1758 | asection *srelbss; |
| 1759 | |
| 1760 | /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */ |
| 1761 | asection *srelplt2; |
| 1762 | |
| 1763 | /* Data for R_ARM_TLS_LDM32 relocations. */ |
| 1764 | union { |
| 1765 | bfd_signed_vma refcount; |
| 1766 | bfd_vma offset; |
| 1767 | } tls_ldm_got; |
| 1768 | |
| 1769 | /* Small local sym to section mapping cache. */ |
| 1770 | struct sym_sec_cache sym_sec; |
| 1771 | |
| 1772 | /* For convenience in allocate_dynrelocs. */ |
| 1773 | bfd * obfd; |
| 1774 | }; |
| 1775 | |
| 1776 | /* Create an entry in an ARM ELF linker hash table. */ |
| 1777 | |
| 1778 | static struct bfd_hash_entry * |
| 1779 | elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry, |
| 1780 | struct bfd_hash_table * table, |
| 1781 | const char * string) |
| 1782 | { |
| 1783 | struct elf32_arm_link_hash_entry * ret = |
| 1784 | (struct elf32_arm_link_hash_entry *) entry; |
| 1785 | |
| 1786 | /* Allocate the structure if it has not already been allocated by a |
| 1787 | subclass. */ |
| 1788 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) |
| 1789 | ret = bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry)); |
| 1790 | if (ret == NULL) |
| 1791 | return (struct bfd_hash_entry *) ret; |
| 1792 | |
| 1793 | /* Call the allocation method of the superclass. */ |
| 1794 | ret = ((struct elf32_arm_link_hash_entry *) |
| 1795 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 1796 | table, string)); |
| 1797 | if (ret != NULL) |
| 1798 | { |
| 1799 | ret->relocs_copied = NULL; |
| 1800 | ret->tls_type = GOT_UNKNOWN; |
| 1801 | ret->plt_thumb_refcount = 0; |
| 1802 | ret->plt_got_offset = -1; |
| 1803 | } |
| 1804 | |
| 1805 | return (struct bfd_hash_entry *) ret; |
| 1806 | } |
| 1807 | |
| 1808 | /* Return true if NAME is the name of the relocation section associated |
| 1809 | with S. */ |
| 1810 | |
| 1811 | static bfd_boolean |
| 1812 | reloc_section_p (struct elf32_arm_link_hash_table *htab, |
| 1813 | const char *name, asection *s) |
| 1814 | { |
| 1815 | if (htab->use_rel) |
| 1816 | return strncmp (name, ".rel", 4) == 0 && strcmp (s->name, name + 4) == 0; |
| 1817 | else |
| 1818 | return strncmp (name, ".rela", 5) == 0 && strcmp (s->name, name + 5) == 0; |
| 1819 | } |
| 1820 | |
| 1821 | /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up |
| 1822 | shortcuts to them in our hash table. */ |
| 1823 | |
| 1824 | static bfd_boolean |
| 1825 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
| 1826 | { |
| 1827 | struct elf32_arm_link_hash_table *htab; |
| 1828 | |
| 1829 | htab = elf32_arm_hash_table (info); |
| 1830 | /* BPABI objects never have a GOT, or associated sections. */ |
| 1831 | if (htab->symbian_p) |
| 1832 | return TRUE; |
| 1833 | |
| 1834 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 1835 | return FALSE; |
| 1836 | |
| 1837 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1838 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 1839 | if (!htab->sgot || !htab->sgotplt) |
| 1840 | abort (); |
| 1841 | |
| 1842 | htab->srelgot = bfd_make_section_with_flags (dynobj, |
| 1843 | RELOC_SECTION (htab, ".got"), |
| 1844 | (SEC_ALLOC | SEC_LOAD |
| 1845 | | SEC_HAS_CONTENTS |
| 1846 | | SEC_IN_MEMORY |
| 1847 | | SEC_LINKER_CREATED |
| 1848 | | SEC_READONLY)); |
| 1849 | if (htab->srelgot == NULL |
| 1850 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) |
| 1851 | return FALSE; |
| 1852 | return TRUE; |
| 1853 | } |
| 1854 | |
| 1855 | /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and |
| 1856 | .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our |
| 1857 | hash table. */ |
| 1858 | |
| 1859 | static bfd_boolean |
| 1860 | elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
| 1861 | { |
| 1862 | struct elf32_arm_link_hash_table *htab; |
| 1863 | |
| 1864 | htab = elf32_arm_hash_table (info); |
| 1865 | if (!htab->sgot && !create_got_section (dynobj, info)) |
| 1866 | return FALSE; |
| 1867 | |
| 1868 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| 1869 | return FALSE; |
| 1870 | |
| 1871 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1872 | htab->srelplt = bfd_get_section_by_name (dynobj, |
| 1873 | RELOC_SECTION (htab, ".plt")); |
| 1874 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 1875 | if (!info->shared) |
| 1876 | htab->srelbss = bfd_get_section_by_name (dynobj, |
| 1877 | RELOC_SECTION (htab, ".bss")); |
| 1878 | |
| 1879 | if (htab->vxworks_p) |
| 1880 | { |
| 1881 | if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2)) |
| 1882 | return FALSE; |
| 1883 | |
| 1884 | if (info->shared) |
| 1885 | { |
| 1886 | htab->plt_header_size = 0; |
| 1887 | htab->plt_entry_size |
| 1888 | = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry); |
| 1889 | } |
| 1890 | else |
| 1891 | { |
| 1892 | htab->plt_header_size |
| 1893 | = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry); |
| 1894 | htab->plt_entry_size |
| 1895 | = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry); |
| 1896 | } |
| 1897 | } |
| 1898 | |
| 1899 | if (!htab->splt |
| 1900 | || !htab->srelplt |
| 1901 | || !htab->sdynbss |
| 1902 | || (!info->shared && !htab->srelbss)) |
| 1903 | abort (); |
| 1904 | |
| 1905 | return TRUE; |
| 1906 | } |
| 1907 | |
| 1908 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 1909 | |
| 1910 | static void |
| 1911 | elf32_arm_copy_indirect_symbol (struct bfd_link_info *info, |
| 1912 | struct elf_link_hash_entry *dir, |
| 1913 | struct elf_link_hash_entry *ind) |
| 1914 | { |
| 1915 | struct elf32_arm_link_hash_entry *edir, *eind; |
| 1916 | |
| 1917 | edir = (struct elf32_arm_link_hash_entry *) dir; |
| 1918 | eind = (struct elf32_arm_link_hash_entry *) ind; |
| 1919 | |
| 1920 | if (eind->relocs_copied != NULL) |
| 1921 | { |
| 1922 | if (edir->relocs_copied != NULL) |
| 1923 | { |
| 1924 | struct elf32_arm_relocs_copied **pp; |
| 1925 | struct elf32_arm_relocs_copied *p; |
| 1926 | |
| 1927 | /* Add reloc counts against the indirect sym to the direct sym |
| 1928 | list. Merge any entries against the same section. */ |
| 1929 | for (pp = &eind->relocs_copied; (p = *pp) != NULL; ) |
| 1930 | { |
| 1931 | struct elf32_arm_relocs_copied *q; |
| 1932 | |
| 1933 | for (q = edir->relocs_copied; q != NULL; q = q->next) |
| 1934 | if (q->section == p->section) |
| 1935 | { |
| 1936 | q->pc_count += p->pc_count; |
| 1937 | q->count += p->count; |
| 1938 | *pp = p->next; |
| 1939 | break; |
| 1940 | } |
| 1941 | if (q == NULL) |
| 1942 | pp = &p->next; |
| 1943 | } |
| 1944 | *pp = edir->relocs_copied; |
| 1945 | } |
| 1946 | |
| 1947 | edir->relocs_copied = eind->relocs_copied; |
| 1948 | eind->relocs_copied = NULL; |
| 1949 | } |
| 1950 | |
| 1951 | /* Copy over PLT info. */ |
| 1952 | edir->plt_thumb_refcount += eind->plt_thumb_refcount; |
| 1953 | eind->plt_thumb_refcount = 0; |
| 1954 | |
| 1955 | if (ind->root.type == bfd_link_hash_indirect |
| 1956 | && dir->got.refcount <= 0) |
| 1957 | { |
| 1958 | edir->tls_type = eind->tls_type; |
| 1959 | eind->tls_type = GOT_UNKNOWN; |
| 1960 | } |
| 1961 | |
| 1962 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 1963 | } |
| 1964 | |
| 1965 | /* Create an ARM elf linker hash table. */ |
| 1966 | |
| 1967 | static struct bfd_link_hash_table * |
| 1968 | elf32_arm_link_hash_table_create (bfd *abfd) |
| 1969 | { |
| 1970 | struct elf32_arm_link_hash_table *ret; |
| 1971 | bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table); |
| 1972 | |
| 1973 | ret = bfd_malloc (amt); |
| 1974 | if (ret == NULL) |
| 1975 | return NULL; |
| 1976 | |
| 1977 | if (!_bfd_elf_link_hash_table_init (& ret->root, abfd, |
| 1978 | elf32_arm_link_hash_newfunc, |
| 1979 | sizeof (struct elf32_arm_link_hash_entry))) |
| 1980 | { |
| 1981 | free (ret); |
| 1982 | return NULL; |
| 1983 | } |
| 1984 | |
| 1985 | ret->sgot = NULL; |
| 1986 | ret->sgotplt = NULL; |
| 1987 | ret->srelgot = NULL; |
| 1988 | ret->splt = NULL; |
| 1989 | ret->srelplt = NULL; |
| 1990 | ret->sdynbss = NULL; |
| 1991 | ret->srelbss = NULL; |
| 1992 | ret->srelplt2 = NULL; |
| 1993 | ret->thumb_glue_size = 0; |
| 1994 | ret->arm_glue_size = 0; |
| 1995 | ret->bfd_of_glue_owner = NULL; |
| 1996 | ret->byteswap_code = 0; |
| 1997 | ret->target1_is_rel = 0; |
| 1998 | ret->target2_reloc = R_ARM_NONE; |
| 1999 | #ifdef FOUR_WORD_PLT |
| 2000 | ret->plt_header_size = 16; |
| 2001 | ret->plt_entry_size = 16; |
| 2002 | #else |
| 2003 | ret->plt_header_size = 20; |
| 2004 | ret->plt_entry_size = 12; |
| 2005 | #endif |
| 2006 | ret->fix_v4bx = 0; |
| 2007 | ret->use_blx = 0; |
| 2008 | ret->vxworks_p = 0; |
| 2009 | ret->symbian_p = 0; |
| 2010 | ret->use_rel = 1; |
| 2011 | ret->sym_sec.abfd = NULL; |
| 2012 | ret->obfd = abfd; |
| 2013 | ret->tls_ldm_got.refcount = 0; |
| 2014 | |
| 2015 | return &ret->root.root; |
| 2016 | } |
| 2017 | |
| 2018 | /* Locate the Thumb encoded calling stub for NAME. */ |
| 2019 | |
| 2020 | static struct elf_link_hash_entry * |
| 2021 | find_thumb_glue (struct bfd_link_info *link_info, |
| 2022 | const char *name, |
| 2023 | bfd *input_bfd) |
| 2024 | { |
| 2025 | char *tmp_name; |
| 2026 | struct elf_link_hash_entry *hash; |
| 2027 | struct elf32_arm_link_hash_table *hash_table; |
| 2028 | |
| 2029 | /* We need a pointer to the armelf specific hash table. */ |
| 2030 | hash_table = elf32_arm_hash_table (link_info); |
| 2031 | |
| 2032 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
| 2033 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); |
| 2034 | |
| 2035 | BFD_ASSERT (tmp_name); |
| 2036 | |
| 2037 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); |
| 2038 | |
| 2039 | hash = elf_link_hash_lookup |
| 2040 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
| 2041 | |
| 2042 | if (hash == NULL) |
| 2043 | /* xgettext:c-format */ |
| 2044 | (*_bfd_error_handler) (_("%B: unable to find THUMB glue '%s' for `%s'"), |
| 2045 | input_bfd, tmp_name, name); |
| 2046 | |
| 2047 | free (tmp_name); |
| 2048 | |
| 2049 | return hash; |
| 2050 | } |
| 2051 | |
| 2052 | /* Locate the ARM encoded calling stub for NAME. */ |
| 2053 | |
| 2054 | static struct elf_link_hash_entry * |
| 2055 | find_arm_glue (struct bfd_link_info *link_info, |
| 2056 | const char *name, |
| 2057 | bfd *input_bfd) |
| 2058 | { |
| 2059 | char *tmp_name; |
| 2060 | struct elf_link_hash_entry *myh; |
| 2061 | struct elf32_arm_link_hash_table *hash_table; |
| 2062 | |
| 2063 | /* We need a pointer to the elfarm specific hash table. */ |
| 2064 | hash_table = elf32_arm_hash_table (link_info); |
| 2065 | |
| 2066 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
| 2067 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); |
| 2068 | |
| 2069 | BFD_ASSERT (tmp_name); |
| 2070 | |
| 2071 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); |
| 2072 | |
| 2073 | myh = elf_link_hash_lookup |
| 2074 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
| 2075 | |
| 2076 | if (myh == NULL) |
| 2077 | /* xgettext:c-format */ |
| 2078 | (*_bfd_error_handler) (_("%B: unable to find ARM glue '%s' for `%s'"), |
| 2079 | input_bfd, tmp_name, name); |
| 2080 | |
| 2081 | free (tmp_name); |
| 2082 | |
| 2083 | return myh; |
| 2084 | } |
| 2085 | |
| 2086 | /* ARM->Thumb glue (static images): |
| 2087 | |
| 2088 | .arm |
| 2089 | __func_from_arm: |
| 2090 | ldr r12, __func_addr |
| 2091 | bx r12 |
| 2092 | __func_addr: |
| 2093 | .word func @ behave as if you saw a ARM_32 reloc. |
| 2094 | |
| 2095 | (relocatable images) |
| 2096 | .arm |
| 2097 | __func_from_arm: |
| 2098 | ldr r12, __func_offset |
| 2099 | add r12, r12, pc |
| 2100 | bx r12 |
| 2101 | __func_offset: |
| 2102 | .word func - . |
| 2103 | */ |
| 2104 | |
| 2105 | #define ARM2THUMB_STATIC_GLUE_SIZE 12 |
| 2106 | static const insn32 a2t1_ldr_insn = 0xe59fc000; |
| 2107 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; |
| 2108 | static const insn32 a2t3_func_addr_insn = 0x00000001; |
| 2109 | |
| 2110 | #define ARM2THUMB_PIC_GLUE_SIZE 16 |
| 2111 | static const insn32 a2t1p_ldr_insn = 0xe59fc004; |
| 2112 | static const insn32 a2t2p_add_pc_insn = 0xe08cc00f; |
| 2113 | static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c; |
| 2114 | |
| 2115 | /* Thumb->ARM: Thumb->(non-interworking aware) ARM |
| 2116 | |
| 2117 | .thumb .thumb |
| 2118 | .align 2 .align 2 |
| 2119 | __func_from_thumb: __func_from_thumb: |
| 2120 | bx pc push {r6, lr} |
| 2121 | nop ldr r6, __func_addr |
| 2122 | .arm mov lr, pc |
| 2123 | __func_change_to_arm: bx r6 |
| 2124 | b func .arm |
| 2125 | __func_back_to_thumb: |
| 2126 | ldmia r13! {r6, lr} |
| 2127 | bx lr |
| 2128 | __func_addr: |
| 2129 | .word func */ |
| 2130 | |
| 2131 | #define THUMB2ARM_GLUE_SIZE 8 |
| 2132 | static const insn16 t2a1_bx_pc_insn = 0x4778; |
| 2133 | static const insn16 t2a2_noop_insn = 0x46c0; |
| 2134 | static const insn32 t2a3_b_insn = 0xea000000; |
| 2135 | |
| 2136 | #ifndef ELFARM_NABI_C_INCLUDED |
| 2137 | bfd_boolean |
| 2138 | bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info) |
| 2139 | { |
| 2140 | asection * s; |
| 2141 | bfd_byte * foo; |
| 2142 | struct elf32_arm_link_hash_table * globals; |
| 2143 | |
| 2144 | globals = elf32_arm_hash_table (info); |
| 2145 | |
| 2146 | BFD_ASSERT (globals != NULL); |
| 2147 | |
| 2148 | if (globals->arm_glue_size != 0) |
| 2149 | { |
| 2150 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2151 | |
| 2152 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
| 2153 | ARM2THUMB_GLUE_SECTION_NAME); |
| 2154 | |
| 2155 | BFD_ASSERT (s != NULL); |
| 2156 | |
| 2157 | foo = bfd_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size); |
| 2158 | |
| 2159 | s->size = globals->arm_glue_size; |
| 2160 | s->contents = foo; |
| 2161 | } |
| 2162 | |
| 2163 | if (globals->thumb_glue_size != 0) |
| 2164 | { |
| 2165 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2166 | |
| 2167 | s = bfd_get_section_by_name |
| 2168 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); |
| 2169 | |
| 2170 | BFD_ASSERT (s != NULL); |
| 2171 | |
| 2172 | foo = bfd_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size); |
| 2173 | |
| 2174 | s->size = globals->thumb_glue_size; |
| 2175 | s->contents = foo; |
| 2176 | } |
| 2177 | |
| 2178 | return TRUE; |
| 2179 | } |
| 2180 | |
| 2181 | static void |
| 2182 | record_arm_to_thumb_glue (struct bfd_link_info * link_info, |
| 2183 | struct elf_link_hash_entry * h) |
| 2184 | { |
| 2185 | const char * name = h->root.root.string; |
| 2186 | asection * s; |
| 2187 | char * tmp_name; |
| 2188 | struct elf_link_hash_entry * myh; |
| 2189 | struct bfd_link_hash_entry * bh; |
| 2190 | struct elf32_arm_link_hash_table * globals; |
| 2191 | bfd_vma val; |
| 2192 | |
| 2193 | globals = elf32_arm_hash_table (link_info); |
| 2194 | |
| 2195 | BFD_ASSERT (globals != NULL); |
| 2196 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2197 | |
| 2198 | s = bfd_get_section_by_name |
| 2199 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); |
| 2200 | |
| 2201 | BFD_ASSERT (s != NULL); |
| 2202 | |
| 2203 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); |
| 2204 | |
| 2205 | BFD_ASSERT (tmp_name); |
| 2206 | |
| 2207 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); |
| 2208 | |
| 2209 | myh = elf_link_hash_lookup |
| 2210 | (&(globals)->root, tmp_name, FALSE, FALSE, TRUE); |
| 2211 | |
| 2212 | if (myh != NULL) |
| 2213 | { |
| 2214 | /* We've already seen this guy. */ |
| 2215 | free (tmp_name); |
| 2216 | return; |
| 2217 | } |
| 2218 | |
| 2219 | /* The only trick here is using hash_table->arm_glue_size as the value. |
| 2220 | Even though the section isn't allocated yet, this is where we will be |
| 2221 | putting it. */ |
| 2222 | bh = NULL; |
| 2223 | val = globals->arm_glue_size + 1; |
| 2224 | _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, |
| 2225 | tmp_name, BSF_GLOBAL, s, val, |
| 2226 | NULL, TRUE, FALSE, &bh); |
| 2227 | |
| 2228 | myh = (struct elf_link_hash_entry *) bh; |
| 2229 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 2230 | myh->forced_local = 1; |
| 2231 | |
| 2232 | free (tmp_name); |
| 2233 | |
| 2234 | if ((link_info->shared || globals->root.is_relocatable_executable)) |
| 2235 | globals->arm_glue_size += ARM2THUMB_PIC_GLUE_SIZE; |
| 2236 | else |
| 2237 | globals->arm_glue_size += ARM2THUMB_STATIC_GLUE_SIZE; |
| 2238 | |
| 2239 | return; |
| 2240 | } |
| 2241 | |
| 2242 | static void |
| 2243 | record_thumb_to_arm_glue (struct bfd_link_info *link_info, |
| 2244 | struct elf_link_hash_entry *h) |
| 2245 | { |
| 2246 | const char *name = h->root.root.string; |
| 2247 | asection *s; |
| 2248 | char *tmp_name; |
| 2249 | struct elf_link_hash_entry *myh; |
| 2250 | struct bfd_link_hash_entry *bh; |
| 2251 | struct elf32_arm_link_hash_table *hash_table; |
| 2252 | bfd_vma val; |
| 2253 | |
| 2254 | hash_table = elf32_arm_hash_table (link_info); |
| 2255 | |
| 2256 | BFD_ASSERT (hash_table != NULL); |
| 2257 | BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL); |
| 2258 | |
| 2259 | s = bfd_get_section_by_name |
| 2260 | (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); |
| 2261 | |
| 2262 | BFD_ASSERT (s != NULL); |
| 2263 | |
| 2264 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
| 2265 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); |
| 2266 | |
| 2267 | BFD_ASSERT (tmp_name); |
| 2268 | |
| 2269 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); |
| 2270 | |
| 2271 | myh = elf_link_hash_lookup |
| 2272 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
| 2273 | |
| 2274 | if (myh != NULL) |
| 2275 | { |
| 2276 | /* We've already seen this guy. */ |
| 2277 | free (tmp_name); |
| 2278 | return; |
| 2279 | } |
| 2280 | |
| 2281 | bh = NULL; |
| 2282 | val = hash_table->thumb_glue_size + 1; |
| 2283 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, |
| 2284 | tmp_name, BSF_GLOBAL, s, val, |
| 2285 | NULL, TRUE, FALSE, &bh); |
| 2286 | |
| 2287 | /* If we mark it 'Thumb', the disassembler will do a better job. */ |
| 2288 | myh = (struct elf_link_hash_entry *) bh; |
| 2289 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC); |
| 2290 | myh->forced_local = 1; |
| 2291 | |
| 2292 | free (tmp_name); |
| 2293 | |
| 2294 | #define CHANGE_TO_ARM "__%s_change_to_arm" |
| 2295 | #define BACK_FROM_ARM "__%s_back_from_arm" |
| 2296 | |
| 2297 | /* Allocate another symbol to mark where we switch to Arm mode. */ |
| 2298 | tmp_name = bfd_malloc ((bfd_size_type) strlen (name) |
| 2299 | + strlen (CHANGE_TO_ARM) + 1); |
| 2300 | |
| 2301 | BFD_ASSERT (tmp_name); |
| 2302 | |
| 2303 | sprintf (tmp_name, CHANGE_TO_ARM, name); |
| 2304 | |
| 2305 | bh = NULL; |
| 2306 | val = hash_table->thumb_glue_size + 4, |
| 2307 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, |
| 2308 | tmp_name, BSF_LOCAL, s, val, |
| 2309 | NULL, TRUE, FALSE, &bh); |
| 2310 | |
| 2311 | free (tmp_name); |
| 2312 | |
| 2313 | hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE; |
| 2314 | |
| 2315 | return; |
| 2316 | } |
| 2317 | |
| 2318 | /* Add the glue sections to ABFD. This function is called from the |
| 2319 | linker scripts in ld/emultempl/{armelf}.em. */ |
| 2320 | |
| 2321 | bfd_boolean |
| 2322 | bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd, |
| 2323 | struct bfd_link_info *info) |
| 2324 | { |
| 2325 | flagword flags; |
| 2326 | asection *sec; |
| 2327 | |
| 2328 | /* If we are only performing a partial |
| 2329 | link do not bother adding the glue. */ |
| 2330 | if (info->relocatable) |
| 2331 | return TRUE; |
| 2332 | |
| 2333 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); |
| 2334 | |
| 2335 | if (sec == NULL) |
| 2336 | { |
| 2337 | /* Note: we do not include the flag SEC_LINKER_CREATED, as this |
| 2338 | will prevent elf_link_input_bfd() from processing the contents |
| 2339 | of this section. */ |
| 2340 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
| 2341 | |
| 2342 | sec = bfd_make_section_with_flags (abfd, |
| 2343 | ARM2THUMB_GLUE_SECTION_NAME, |
| 2344 | flags); |
| 2345 | |
| 2346 | if (sec == NULL |
| 2347 | || !bfd_set_section_alignment (abfd, sec, 2)) |
| 2348 | return FALSE; |
| 2349 | |
| 2350 | /* Set the gc mark to prevent the section from being removed by garbage |
| 2351 | collection, despite the fact that no relocs refer to this section. */ |
| 2352 | sec->gc_mark = 1; |
| 2353 | } |
| 2354 | |
| 2355 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); |
| 2356 | |
| 2357 | if (sec == NULL) |
| 2358 | { |
| 2359 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| 2360 | | SEC_CODE | SEC_READONLY; |
| 2361 | |
| 2362 | sec = bfd_make_section_with_flags (abfd, |
| 2363 | THUMB2ARM_GLUE_SECTION_NAME, |
| 2364 | flags); |
| 2365 | |
| 2366 | if (sec == NULL |
| 2367 | || !bfd_set_section_alignment (abfd, sec, 2)) |
| 2368 | return FALSE; |
| 2369 | |
| 2370 | sec->gc_mark = 1; |
| 2371 | } |
| 2372 | |
| 2373 | return TRUE; |
| 2374 | } |
| 2375 | |
| 2376 | /* Select a BFD to be used to hold the sections used by the glue code. |
| 2377 | This function is called from the linker scripts in ld/emultempl/ |
| 2378 | {armelf/pe}.em */ |
| 2379 | |
| 2380 | bfd_boolean |
| 2381 | bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info) |
| 2382 | { |
| 2383 | struct elf32_arm_link_hash_table *globals; |
| 2384 | |
| 2385 | /* If we are only performing a partial link |
| 2386 | do not bother getting a bfd to hold the glue. */ |
| 2387 | if (info->relocatable) |
| 2388 | return TRUE; |
| 2389 | |
| 2390 | /* Make sure we don't attach the glue sections to a dynamic object. */ |
| 2391 | BFD_ASSERT (!(abfd->flags & DYNAMIC)); |
| 2392 | |
| 2393 | globals = elf32_arm_hash_table (info); |
| 2394 | |
| 2395 | BFD_ASSERT (globals != NULL); |
| 2396 | |
| 2397 | if (globals->bfd_of_glue_owner != NULL) |
| 2398 | return TRUE; |
| 2399 | |
| 2400 | /* Save the bfd for later use. */ |
| 2401 | globals->bfd_of_glue_owner = abfd; |
| 2402 | |
| 2403 | return TRUE; |
| 2404 | } |
| 2405 | |
| 2406 | static void check_use_blx(struct elf32_arm_link_hash_table *globals) |
| 2407 | { |
| 2408 | if (elf32_arm_get_eabi_attr_int (globals->obfd, Tag_CPU_arch) > 2) |
| 2409 | globals->use_blx = 1; |
| 2410 | } |
| 2411 | |
| 2412 | bfd_boolean |
| 2413 | bfd_elf32_arm_process_before_allocation (bfd *abfd, |
| 2414 | struct bfd_link_info *link_info, |
| 2415 | int byteswap_code) |
| 2416 | { |
| 2417 | Elf_Internal_Shdr *symtab_hdr; |
| 2418 | Elf_Internal_Rela *internal_relocs = NULL; |
| 2419 | Elf_Internal_Rela *irel, *irelend; |
| 2420 | bfd_byte *contents = NULL; |
| 2421 | |
| 2422 | asection *sec; |
| 2423 | struct elf32_arm_link_hash_table *globals; |
| 2424 | |
| 2425 | /* If we are only performing a partial link do not bother |
| 2426 | to construct any glue. */ |
| 2427 | if (link_info->relocatable) |
| 2428 | return TRUE; |
| 2429 | |
| 2430 | /* Here we have a bfd that is to be included on the link. We have a hook |
| 2431 | to do reloc rummaging, before section sizes are nailed down. */ |
| 2432 | globals = elf32_arm_hash_table (link_info); |
| 2433 | check_use_blx (globals); |
| 2434 | |
| 2435 | BFD_ASSERT (globals != NULL); |
| 2436 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2437 | |
| 2438 | if (byteswap_code && !bfd_big_endian (abfd)) |
| 2439 | { |
| 2440 | _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."), |
| 2441 | abfd); |
| 2442 | return FALSE; |
| 2443 | } |
| 2444 | globals->byteswap_code = byteswap_code; |
| 2445 | |
| 2446 | /* Rummage around all the relocs and map the glue vectors. */ |
| 2447 | sec = abfd->sections; |
| 2448 | |
| 2449 | if (sec == NULL) |
| 2450 | return TRUE; |
| 2451 | |
| 2452 | for (; sec != NULL; sec = sec->next) |
| 2453 | { |
| 2454 | if (sec->reloc_count == 0) |
| 2455 | continue; |
| 2456 | |
| 2457 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2458 | |
| 2459 | /* Load the relocs. */ |
| 2460 | internal_relocs |
| 2461 | = _bfd_elf_link_read_relocs (abfd, sec, (void *) NULL, |
| 2462 | (Elf_Internal_Rela *) NULL, FALSE); |
| 2463 | |
| 2464 | if (internal_relocs == NULL) |
| 2465 | goto error_return; |
| 2466 | |
| 2467 | irelend = internal_relocs + sec->reloc_count; |
| 2468 | for (irel = internal_relocs; irel < irelend; irel++) |
| 2469 | { |
| 2470 | long r_type; |
| 2471 | unsigned long r_index; |
| 2472 | |
| 2473 | struct elf_link_hash_entry *h; |
| 2474 | |
| 2475 | r_type = ELF32_R_TYPE (irel->r_info); |
| 2476 | r_index = ELF32_R_SYM (irel->r_info); |
| 2477 | |
| 2478 | /* These are the only relocation types we care about. */ |
| 2479 | if ( r_type != R_ARM_PC24 |
| 2480 | && r_type != R_ARM_PLT32 |
| 2481 | && r_type != R_ARM_CALL |
| 2482 | && r_type != R_ARM_JUMP24 |
| 2483 | && r_type != R_ARM_THM_CALL) |
| 2484 | continue; |
| 2485 | |
| 2486 | /* Get the section contents if we haven't done so already. */ |
| 2487 | if (contents == NULL) |
| 2488 | { |
| 2489 | /* Get cached copy if it exists. */ |
| 2490 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 2491 | contents = elf_section_data (sec)->this_hdr.contents; |
| 2492 | else |
| 2493 | { |
| 2494 | /* Go get them off disk. */ |
| 2495 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 2496 | goto error_return; |
| 2497 | } |
| 2498 | } |
| 2499 | |
| 2500 | /* If the relocation is not against a symbol it cannot concern us. */ |
| 2501 | h = NULL; |
| 2502 | |
| 2503 | /* We don't care about local symbols. */ |
| 2504 | if (r_index < symtab_hdr->sh_info) |
| 2505 | continue; |
| 2506 | |
| 2507 | /* This is an external symbol. */ |
| 2508 | r_index -= symtab_hdr->sh_info; |
| 2509 | h = (struct elf_link_hash_entry *) |
| 2510 | elf_sym_hashes (abfd)[r_index]; |
| 2511 | |
| 2512 | /* If the relocation is against a static symbol it must be within |
| 2513 | the current section and so cannot be a cross ARM/Thumb relocation. */ |
| 2514 | if (h == NULL) |
| 2515 | continue; |
| 2516 | |
| 2517 | /* If the call will go through a PLT entry then we do not need |
| 2518 | glue. */ |
| 2519 | if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1) |
| 2520 | continue; |
| 2521 | |
| 2522 | switch (r_type) |
| 2523 | { |
| 2524 | case R_ARM_PC24: |
| 2525 | case R_ARM_PLT32: |
| 2526 | case R_ARM_CALL: |
| 2527 | case R_ARM_JUMP24: |
| 2528 | /* This one is a call from arm code. We need to look up |
| 2529 | the target of the call. If it is a thumb target, we |
| 2530 | insert glue. */ |
| 2531 | if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC |
| 2532 | && !(r_type == R_ARM_CALL && globals->use_blx)) |
| 2533 | record_arm_to_thumb_glue (link_info, h); |
| 2534 | break; |
| 2535 | |
| 2536 | case R_ARM_THM_CALL: |
| 2537 | /* This one is a call from thumb code. We look |
| 2538 | up the target of the call. If it is not a thumb |
| 2539 | target, we insert glue. */ |
| 2540 | if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC && !globals->use_blx) |
| 2541 | record_thumb_to_arm_glue (link_info, h); |
| 2542 | break; |
| 2543 | |
| 2544 | default: |
| 2545 | abort (); |
| 2546 | } |
| 2547 | } |
| 2548 | |
| 2549 | if (contents != NULL |
| 2550 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 2551 | free (contents); |
| 2552 | contents = NULL; |
| 2553 | |
| 2554 | if (internal_relocs != NULL |
| 2555 | && elf_section_data (sec)->relocs != internal_relocs) |
| 2556 | free (internal_relocs); |
| 2557 | internal_relocs = NULL; |
| 2558 | } |
| 2559 | |
| 2560 | return TRUE; |
| 2561 | |
| 2562 | error_return: |
| 2563 | if (contents != NULL |
| 2564 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 2565 | free (contents); |
| 2566 | if (internal_relocs != NULL |
| 2567 | && elf_section_data (sec)->relocs != internal_relocs) |
| 2568 | free (internal_relocs); |
| 2569 | |
| 2570 | return FALSE; |
| 2571 | } |
| 2572 | #endif |
| 2573 | |
| 2574 | |
| 2575 | /* Set target relocation values needed during linking. */ |
| 2576 | |
| 2577 | void |
| 2578 | bfd_elf32_arm_set_target_relocs (struct bfd_link_info *link_info, |
| 2579 | int target1_is_rel, |
| 2580 | char * target2_type, |
| 2581 | int fix_v4bx, |
| 2582 | int use_blx) |
| 2583 | { |
| 2584 | struct elf32_arm_link_hash_table *globals; |
| 2585 | |
| 2586 | globals = elf32_arm_hash_table (link_info); |
| 2587 | |
| 2588 | globals->target1_is_rel = target1_is_rel; |
| 2589 | if (strcmp (target2_type, "rel") == 0) |
| 2590 | globals->target2_reloc = R_ARM_REL32; |
| 2591 | else if (strcmp (target2_type, "abs") == 0) |
| 2592 | globals->target2_reloc = R_ARM_ABS32; |
| 2593 | else if (strcmp (target2_type, "got-rel") == 0) |
| 2594 | globals->target2_reloc = R_ARM_GOT_PREL; |
| 2595 | else |
| 2596 | { |
| 2597 | _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."), |
| 2598 | target2_type); |
| 2599 | } |
| 2600 | globals->fix_v4bx = fix_v4bx; |
| 2601 | globals->use_blx |= use_blx; |
| 2602 | } |
| 2603 | |
| 2604 | /* The thumb form of a long branch is a bit finicky, because the offset |
| 2605 | encoding is split over two fields, each in it's own instruction. They |
| 2606 | can occur in any order. So given a thumb form of long branch, and an |
| 2607 | offset, insert the offset into the thumb branch and return finished |
| 2608 | instruction. |
| 2609 | |
| 2610 | It takes two thumb instructions to encode the target address. Each has |
| 2611 | 11 bits to invest. The upper 11 bits are stored in one (identified by |
| 2612 | H-0.. see below), the lower 11 bits are stored in the other (identified |
| 2613 | by H-1). |
| 2614 | |
| 2615 | Combine together and shifted left by 1 (it's a half word address) and |
| 2616 | there you have it. |
| 2617 | |
| 2618 | Op: 1111 = F, |
| 2619 | H-0, upper address-0 = 000 |
| 2620 | Op: 1111 = F, |
| 2621 | H-1, lower address-0 = 800 |
| 2622 | |
| 2623 | They can be ordered either way, but the arm tools I've seen always put |
| 2624 | the lower one first. It probably doesn't matter. krk@cygnus.com |
| 2625 | |
| 2626 | XXX: Actually the order does matter. The second instruction (H-1) |
| 2627 | moves the computed address into the PC, so it must be the second one |
| 2628 | in the sequence. The problem, however is that whilst little endian code |
| 2629 | stores the instructions in HI then LOW order, big endian code does the |
| 2630 | reverse. nickc@cygnus.com. */ |
| 2631 | |
| 2632 | #define LOW_HI_ORDER 0xF800F000 |
| 2633 | #define HI_LOW_ORDER 0xF000F800 |
| 2634 | |
| 2635 | static insn32 |
| 2636 | insert_thumb_branch (insn32 br_insn, int rel_off) |
| 2637 | { |
| 2638 | unsigned int low_bits; |
| 2639 | unsigned int high_bits; |
| 2640 | |
| 2641 | BFD_ASSERT ((rel_off & 1) != 1); |
| 2642 | |
| 2643 | rel_off >>= 1; /* Half word aligned address. */ |
| 2644 | low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */ |
| 2645 | high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */ |
| 2646 | |
| 2647 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) |
| 2648 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; |
| 2649 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) |
| 2650 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; |
| 2651 | else |
| 2652 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ |
| 2653 | abort (); /* Error - not a valid branch instruction form. */ |
| 2654 | |
| 2655 | return br_insn; |
| 2656 | } |
| 2657 | |
| 2658 | |
| 2659 | /* Store an Arm insn into an output section not processed by |
| 2660 | elf32_arm_write_section. */ |
| 2661 | |
| 2662 | static void |
| 2663 | put_arm_insn (struct elf32_arm_link_hash_table *htab, |
| 2664 | bfd * output_bfd, bfd_vma val, void * ptr) |
| 2665 | { |
| 2666 | if (htab->byteswap_code != bfd_little_endian (output_bfd)) |
| 2667 | bfd_putl32 (val, ptr); |
| 2668 | else |
| 2669 | bfd_putb32 (val, ptr); |
| 2670 | } |
| 2671 | |
| 2672 | |
| 2673 | /* Store a 16-bit Thumb insn into an output section not processed by |
| 2674 | elf32_arm_write_section. */ |
| 2675 | |
| 2676 | static void |
| 2677 | put_thumb_insn (struct elf32_arm_link_hash_table *htab, |
| 2678 | bfd * output_bfd, bfd_vma val, void * ptr) |
| 2679 | { |
| 2680 | if (htab->byteswap_code != bfd_little_endian (output_bfd)) |
| 2681 | bfd_putl16 (val, ptr); |
| 2682 | else |
| 2683 | bfd_putb16 (val, ptr); |
| 2684 | } |
| 2685 | |
| 2686 | |
| 2687 | /* Thumb code calling an ARM function. */ |
| 2688 | |
| 2689 | static int |
| 2690 | elf32_thumb_to_arm_stub (struct bfd_link_info * info, |
| 2691 | const char * name, |
| 2692 | bfd * input_bfd, |
| 2693 | bfd * output_bfd, |
| 2694 | asection * input_section, |
| 2695 | bfd_byte * hit_data, |
| 2696 | asection * sym_sec, |
| 2697 | bfd_vma offset, |
| 2698 | bfd_signed_vma addend, |
| 2699 | bfd_vma val) |
| 2700 | { |
| 2701 | asection * s = 0; |
| 2702 | bfd_vma my_offset; |
| 2703 | unsigned long int tmp; |
| 2704 | long int ret_offset; |
| 2705 | struct elf_link_hash_entry * myh; |
| 2706 | struct elf32_arm_link_hash_table * globals; |
| 2707 | |
| 2708 | myh = find_thumb_glue (info, name, input_bfd); |
| 2709 | if (myh == NULL) |
| 2710 | return FALSE; |
| 2711 | |
| 2712 | globals = elf32_arm_hash_table (info); |
| 2713 | |
| 2714 | BFD_ASSERT (globals != NULL); |
| 2715 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2716 | |
| 2717 | my_offset = myh->root.u.def.value; |
| 2718 | |
| 2719 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
| 2720 | THUMB2ARM_GLUE_SECTION_NAME); |
| 2721 | |
| 2722 | BFD_ASSERT (s != NULL); |
| 2723 | BFD_ASSERT (s->contents != NULL); |
| 2724 | BFD_ASSERT (s->output_section != NULL); |
| 2725 | |
| 2726 | if ((my_offset & 0x01) == 0x01) |
| 2727 | { |
| 2728 | if (sym_sec != NULL |
| 2729 | && sym_sec->owner != NULL |
| 2730 | && !INTERWORK_FLAG (sym_sec->owner)) |
| 2731 | { |
| 2732 | (*_bfd_error_handler) |
| 2733 | (_("%B(%s): warning: interworking not enabled.\n" |
| 2734 | " first occurrence: %B: thumb call to arm"), |
| 2735 | sym_sec->owner, input_bfd, name); |
| 2736 | |
| 2737 | return FALSE; |
| 2738 | } |
| 2739 | |
| 2740 | --my_offset; |
| 2741 | myh->root.u.def.value = my_offset; |
| 2742 | |
| 2743 | put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn, |
| 2744 | s->contents + my_offset); |
| 2745 | |
| 2746 | put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn, |
| 2747 | s->contents + my_offset + 2); |
| 2748 | |
| 2749 | ret_offset = |
| 2750 | /* Address of destination of the stub. */ |
| 2751 | ((bfd_signed_vma) val) |
| 2752 | - ((bfd_signed_vma) |
| 2753 | /* Offset from the start of the current section |
| 2754 | to the start of the stubs. */ |
| 2755 | (s->output_offset |
| 2756 | /* Offset of the start of this stub from the start of the stubs. */ |
| 2757 | + my_offset |
| 2758 | /* Address of the start of the current section. */ |
| 2759 | + s->output_section->vma) |
| 2760 | /* The branch instruction is 4 bytes into the stub. */ |
| 2761 | + 4 |
| 2762 | /* ARM branches work from the pc of the instruction + 8. */ |
| 2763 | + 8); |
| 2764 | |
| 2765 | put_arm_insn (globals, output_bfd, |
| 2766 | (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), |
| 2767 | s->contents + my_offset + 4); |
| 2768 | } |
| 2769 | |
| 2770 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); |
| 2771 | |
| 2772 | /* Now go back and fix up the original BL insn to point to here. */ |
| 2773 | ret_offset = |
| 2774 | /* Address of where the stub is located. */ |
| 2775 | (s->output_section->vma + s->output_offset + my_offset) |
| 2776 | /* Address of where the BL is located. */ |
| 2777 | - (input_section->output_section->vma + input_section->output_offset |
| 2778 | + offset) |
| 2779 | /* Addend in the relocation. */ |
| 2780 | - addend |
| 2781 | /* Biassing for PC-relative addressing. */ |
| 2782 | - 8; |
| 2783 | |
| 2784 | tmp = bfd_get_32 (input_bfd, hit_data |
| 2785 | - input_section->vma); |
| 2786 | |
| 2787 | bfd_put_32 (output_bfd, |
| 2788 | (bfd_vma) insert_thumb_branch (tmp, ret_offset), |
| 2789 | hit_data - input_section->vma); |
| 2790 | |
| 2791 | return TRUE; |
| 2792 | } |
| 2793 | |
| 2794 | /* Arm code calling a Thumb function. */ |
| 2795 | |
| 2796 | static int |
| 2797 | elf32_arm_to_thumb_stub (struct bfd_link_info * info, |
| 2798 | const char * name, |
| 2799 | bfd * input_bfd, |
| 2800 | bfd * output_bfd, |
| 2801 | asection * input_section, |
| 2802 | bfd_byte * hit_data, |
| 2803 | asection * sym_sec, |
| 2804 | bfd_vma offset, |
| 2805 | bfd_signed_vma addend, |
| 2806 | bfd_vma val) |
| 2807 | { |
| 2808 | unsigned long int tmp; |
| 2809 | bfd_vma my_offset; |
| 2810 | asection * s; |
| 2811 | long int ret_offset; |
| 2812 | struct elf_link_hash_entry * myh; |
| 2813 | struct elf32_arm_link_hash_table * globals; |
| 2814 | |
| 2815 | myh = find_arm_glue (info, name, input_bfd); |
| 2816 | if (myh == NULL) |
| 2817 | return FALSE; |
| 2818 | |
| 2819 | globals = elf32_arm_hash_table (info); |
| 2820 | |
| 2821 | BFD_ASSERT (globals != NULL); |
| 2822 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 2823 | |
| 2824 | my_offset = myh->root.u.def.value; |
| 2825 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
| 2826 | ARM2THUMB_GLUE_SECTION_NAME); |
| 2827 | BFD_ASSERT (s != NULL); |
| 2828 | BFD_ASSERT (s->contents != NULL); |
| 2829 | BFD_ASSERT (s->output_section != NULL); |
| 2830 | |
| 2831 | if ((my_offset & 0x01) == 0x01) |
| 2832 | { |
| 2833 | if (sym_sec != NULL |
| 2834 | && sym_sec->owner != NULL |
| 2835 | && !INTERWORK_FLAG (sym_sec->owner)) |
| 2836 | { |
| 2837 | (*_bfd_error_handler) |
| 2838 | (_("%B(%s): warning: interworking not enabled.\n" |
| 2839 | " first occurrence: %B: arm call to thumb"), |
| 2840 | sym_sec->owner, input_bfd, name); |
| 2841 | } |
| 2842 | |
| 2843 | --my_offset; |
| 2844 | myh->root.u.def.value = my_offset; |
| 2845 | |
| 2846 | if ((info->shared || globals->root.is_relocatable_executable)) |
| 2847 | { |
| 2848 | /* For relocatable objects we can't use absolute addresses, |
| 2849 | so construct the address from a relative offset. */ |
| 2850 | /* TODO: If the offset is small it's probably worth |
| 2851 | constructing the address with adds. */ |
| 2852 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn, |
| 2853 | s->contents + my_offset); |
| 2854 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn, |
| 2855 | s->contents + my_offset + 4); |
| 2856 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn, |
| 2857 | s->contents + my_offset + 8); |
| 2858 | /* Adjust the offset by 4 for the position of the add, |
| 2859 | and 8 for the pipeline offset. */ |
| 2860 | ret_offset = (val - (s->output_offset |
| 2861 | + s->output_section->vma |
| 2862 | + my_offset + 12)) |
| 2863 | | 1; |
| 2864 | bfd_put_32 (output_bfd, ret_offset, |
| 2865 | s->contents + my_offset + 12); |
| 2866 | } |
| 2867 | else |
| 2868 | { |
| 2869 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn, |
| 2870 | s->contents + my_offset); |
| 2871 | |
| 2872 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn, |
| 2873 | s->contents + my_offset + 4); |
| 2874 | |
| 2875 | /* It's a thumb address. Add the low order bit. */ |
| 2876 | bfd_put_32 (output_bfd, val | a2t3_func_addr_insn, |
| 2877 | s->contents + my_offset + 8); |
| 2878 | } |
| 2879 | } |
| 2880 | |
| 2881 | BFD_ASSERT (my_offset <= globals->arm_glue_size); |
| 2882 | |
| 2883 | tmp = bfd_get_32 (input_bfd, hit_data); |
| 2884 | tmp = tmp & 0xFF000000; |
| 2885 | |
| 2886 | /* Somehow these are both 4 too far, so subtract 8. */ |
| 2887 | ret_offset = (s->output_offset |
| 2888 | + my_offset |
| 2889 | + s->output_section->vma |
| 2890 | - (input_section->output_offset |
| 2891 | + input_section->output_section->vma |
| 2892 | + offset + addend) |
| 2893 | - 8); |
| 2894 | |
| 2895 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); |
| 2896 | |
| 2897 | bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma); |
| 2898 | |
| 2899 | return TRUE; |
| 2900 | } |
| 2901 | |
| 2902 | /* Some relocations map to different relocations depending on the |
| 2903 | target. Return the real relocation. */ |
| 2904 | static int |
| 2905 | arm_real_reloc_type (struct elf32_arm_link_hash_table * globals, |
| 2906 | int r_type) |
| 2907 | { |
| 2908 | switch (r_type) |
| 2909 | { |
| 2910 | case R_ARM_TARGET1: |
| 2911 | if (globals->target1_is_rel) |
| 2912 | return R_ARM_REL32; |
| 2913 | else |
| 2914 | return R_ARM_ABS32; |
| 2915 | |
| 2916 | case R_ARM_TARGET2: |
| 2917 | return globals->target2_reloc; |
| 2918 | |
| 2919 | default: |
| 2920 | return r_type; |
| 2921 | } |
| 2922 | } |
| 2923 | |
| 2924 | /* Return the base VMA address which should be subtracted from real addresses |
| 2925 | when resolving @dtpoff relocation. |
| 2926 | This is PT_TLS segment p_vaddr. */ |
| 2927 | |
| 2928 | static bfd_vma |
| 2929 | dtpoff_base (struct bfd_link_info *info) |
| 2930 | { |
| 2931 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 2932 | if (elf_hash_table (info)->tls_sec == NULL) |
| 2933 | return 0; |
| 2934 | return elf_hash_table (info)->tls_sec->vma; |
| 2935 | } |
| 2936 | |
| 2937 | /* Return the relocation value for @tpoff relocation |
| 2938 | if STT_TLS virtual address is ADDRESS. */ |
| 2939 | |
| 2940 | static bfd_vma |
| 2941 | tpoff (struct bfd_link_info *info, bfd_vma address) |
| 2942 | { |
| 2943 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 2944 | bfd_vma base; |
| 2945 | |
| 2946 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 2947 | if (htab->tls_sec == NULL) |
| 2948 | return 0; |
| 2949 | base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power); |
| 2950 | return address - htab->tls_sec->vma + base; |
| 2951 | } |
| 2952 | |
| 2953 | /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA. |
| 2954 | VALUE is the relocation value. */ |
| 2955 | |
| 2956 | static bfd_reloc_status_type |
| 2957 | elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value) |
| 2958 | { |
| 2959 | if (value > 0xfff) |
| 2960 | return bfd_reloc_overflow; |
| 2961 | |
| 2962 | value |= bfd_get_32 (abfd, data) & 0xfffff000; |
| 2963 | bfd_put_32 (abfd, value, data); |
| 2964 | return bfd_reloc_ok; |
| 2965 | } |
| 2966 | |
| 2967 | /* Perform a relocation as part of a final link. */ |
| 2968 | |
| 2969 | static bfd_reloc_status_type |
| 2970 | elf32_arm_final_link_relocate (reloc_howto_type * howto, |
| 2971 | bfd * input_bfd, |
| 2972 | bfd * output_bfd, |
| 2973 | asection * input_section, |
| 2974 | bfd_byte * contents, |
| 2975 | Elf_Internal_Rela * rel, |
| 2976 | bfd_vma value, |
| 2977 | struct bfd_link_info * info, |
| 2978 | asection * sym_sec, |
| 2979 | const char * sym_name, |
| 2980 | int sym_flags, |
| 2981 | struct elf_link_hash_entry * h, |
| 2982 | bfd_boolean * unresolved_reloc_p) |
| 2983 | { |
| 2984 | unsigned long r_type = howto->type; |
| 2985 | unsigned long r_symndx; |
| 2986 | bfd_byte * hit_data = contents + rel->r_offset; |
| 2987 | bfd * dynobj = NULL; |
| 2988 | Elf_Internal_Shdr * symtab_hdr; |
| 2989 | struct elf_link_hash_entry ** sym_hashes; |
| 2990 | bfd_vma * local_got_offsets; |
| 2991 | asection * sgot = NULL; |
| 2992 | asection * splt = NULL; |
| 2993 | asection * sreloc = NULL; |
| 2994 | bfd_vma addend; |
| 2995 | bfd_signed_vma signed_addend; |
| 2996 | struct elf32_arm_link_hash_table * globals; |
| 2997 | |
| 2998 | globals = elf32_arm_hash_table (info); |
| 2999 | |
| 3000 | /* Some relocation type map to different relocations depending on the |
| 3001 | target. We pick the right one here. */ |
| 3002 | r_type = arm_real_reloc_type (globals, r_type); |
| 3003 | if (r_type != howto->type) |
| 3004 | howto = elf32_arm_howto_from_type (r_type); |
| 3005 | |
| 3006 | /* If the start address has been set, then set the EF_ARM_HASENTRY |
| 3007 | flag. Setting this more than once is redundant, but the cost is |
| 3008 | not too high, and it keeps the code simple. |
| 3009 | |
| 3010 | The test is done here, rather than somewhere else, because the |
| 3011 | start address is only set just before the final link commences. |
| 3012 | |
| 3013 | Note - if the user deliberately sets a start address of 0, the |
| 3014 | flag will not be set. */ |
| 3015 | if (bfd_get_start_address (output_bfd) != 0) |
| 3016 | elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY; |
| 3017 | |
| 3018 | dynobj = elf_hash_table (info)->dynobj; |
| 3019 | if (dynobj) |
| 3020 | { |
| 3021 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 3022 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 3023 | } |
| 3024 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 3025 | sym_hashes = elf_sym_hashes (input_bfd); |
| 3026 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 3027 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3028 | |
| 3029 | if (globals->use_rel) |
| 3030 | { |
| 3031 | addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask; |
| 3032 | |
| 3033 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 3034 | { |
| 3035 | signed_addend = -1; |
| 3036 | signed_addend &= ~ howto->src_mask; |
| 3037 | signed_addend |= addend; |
| 3038 | } |
| 3039 | else |
| 3040 | signed_addend = addend; |
| 3041 | } |
| 3042 | else |
| 3043 | addend = signed_addend = rel->r_addend; |
| 3044 | |
| 3045 | switch (r_type) |
| 3046 | { |
| 3047 | case R_ARM_NONE: |
| 3048 | /* We don't need to find a value for this symbol. It's just a |
| 3049 | marker. */ |
| 3050 | *unresolved_reloc_p = FALSE; |
| 3051 | return bfd_reloc_ok; |
| 3052 | |
| 3053 | case R_ARM_ABS12: |
| 3054 | if (!globals->vxworks_p) |
| 3055 | return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend); |
| 3056 | |
| 3057 | case R_ARM_PC24: |
| 3058 | case R_ARM_ABS32: |
| 3059 | case R_ARM_REL32: |
| 3060 | case R_ARM_CALL: |
| 3061 | case R_ARM_JUMP24: |
| 3062 | case R_ARM_XPC25: |
| 3063 | case R_ARM_PREL31: |
| 3064 | case R_ARM_PLT32: |
| 3065 | /* r_symndx will be zero only for relocs against symbols |
| 3066 | from removed linkonce sections, or sections discarded by |
| 3067 | a linker script. */ |
| 3068 | if (r_symndx == 0) |
| 3069 | return bfd_reloc_ok; |
| 3070 | |
| 3071 | /* Handle relocations which should use the PLT entry. ABS32/REL32 |
| 3072 | will use the symbol's value, which may point to a PLT entry, but we |
| 3073 | don't need to handle that here. If we created a PLT entry, all |
| 3074 | branches in this object should go to it. */ |
| 3075 | if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32) |
| 3076 | && h != NULL |
| 3077 | && splt != NULL |
| 3078 | && h->plt.offset != (bfd_vma) -1) |
| 3079 | { |
| 3080 | /* If we've created a .plt section, and assigned a PLT entry to |
| 3081 | this function, it should not be known to bind locally. If |
| 3082 | it were, we would have cleared the PLT entry. */ |
| 3083 | BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); |
| 3084 | |
| 3085 | value = (splt->output_section->vma |
| 3086 | + splt->output_offset |
| 3087 | + h->plt.offset); |
| 3088 | *unresolved_reloc_p = FALSE; |
| 3089 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3090 | contents, rel->r_offset, value, |
| 3091 | rel->r_addend); |
| 3092 | } |
| 3093 | |
| 3094 | /* When generating a shared object or relocatable executable, these |
| 3095 | relocations are copied into the output file to be resolved at |
| 3096 | run time. */ |
| 3097 | if ((info->shared || globals->root.is_relocatable_executable) |
| 3098 | && (input_section->flags & SEC_ALLOC) |
| 3099 | && (r_type != R_ARM_REL32 |
| 3100 | || !SYMBOL_CALLS_LOCAL (info, h)) |
| 3101 | && (h == NULL |
| 3102 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 3103 | || h->root.type != bfd_link_hash_undefweak) |
| 3104 | && r_type != R_ARM_PC24 |
| 3105 | && r_type != R_ARM_CALL |
| 3106 | && r_type != R_ARM_JUMP24 |
| 3107 | && r_type != R_ARM_PREL31 |
| 3108 | && r_type != R_ARM_PLT32) |
| 3109 | { |
| 3110 | Elf_Internal_Rela outrel; |
| 3111 | bfd_byte *loc; |
| 3112 | bfd_boolean skip, relocate; |
| 3113 | |
| 3114 | *unresolved_reloc_p = FALSE; |
| 3115 | |
| 3116 | if (sreloc == NULL) |
| 3117 | { |
| 3118 | const char * name; |
| 3119 | |
| 3120 | name = (bfd_elf_string_from_elf_section |
| 3121 | (input_bfd, |
| 3122 | elf_elfheader (input_bfd)->e_shstrndx, |
| 3123 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 3124 | if (name == NULL) |
| 3125 | return bfd_reloc_notsupported; |
| 3126 | |
| 3127 | BFD_ASSERT (reloc_section_p (globals, name, input_section)); |
| 3128 | |
| 3129 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 3130 | BFD_ASSERT (sreloc != NULL); |
| 3131 | } |
| 3132 | |
| 3133 | skip = FALSE; |
| 3134 | relocate = FALSE; |
| 3135 | |
| 3136 | outrel.r_addend = addend; |
| 3137 | outrel.r_offset = |
| 3138 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 3139 | rel->r_offset); |
| 3140 | if (outrel.r_offset == (bfd_vma) -1) |
| 3141 | skip = TRUE; |
| 3142 | else if (outrel.r_offset == (bfd_vma) -2) |
| 3143 | skip = TRUE, relocate = TRUE; |
| 3144 | outrel.r_offset += (input_section->output_section->vma |
| 3145 | + input_section->output_offset); |
| 3146 | |
| 3147 | if (skip) |
| 3148 | memset (&outrel, 0, sizeof outrel); |
| 3149 | else if (h != NULL |
| 3150 | && h->dynindx != -1 |
| 3151 | && (!info->shared |
| 3152 | || !info->symbolic |
| 3153 | || !h->def_regular)) |
| 3154 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 3155 | else |
| 3156 | { |
| 3157 | int symbol; |
| 3158 | |
| 3159 | /* This symbol is local, or marked to become local. */ |
| 3160 | if (sym_flags == STT_ARM_TFUNC) |
| 3161 | value |= 1; |
| 3162 | if (globals->symbian_p) |
| 3163 | { |
| 3164 | /* On Symbian OS, the data segment and text segement |
| 3165 | can be relocated independently. Therefore, we |
| 3166 | must indicate the segment to which this |
| 3167 | relocation is relative. The BPABI allows us to |
| 3168 | use any symbol in the right segment; we just use |
| 3169 | the section symbol as it is convenient. (We |
| 3170 | cannot use the symbol given by "h" directly as it |
| 3171 | will not appear in the dynamic symbol table.) */ |
| 3172 | if (sym_sec) |
| 3173 | symbol = elf_section_data (sym_sec->output_section)->dynindx; |
| 3174 | else |
| 3175 | symbol = elf_section_data (input_section->output_section)->dynindx; |
| 3176 | BFD_ASSERT (symbol != 0); |
| 3177 | } |
| 3178 | else |
| 3179 | /* On SVR4-ish systems, the dynamic loader cannot |
| 3180 | relocate the text and data segments independently, |
| 3181 | so the symbol does not matter. */ |
| 3182 | symbol = 0; |
| 3183 | outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE); |
| 3184 | if (globals->use_rel) |
| 3185 | relocate = TRUE; |
| 3186 | else |
| 3187 | outrel.r_addend += value; |
| 3188 | } |
| 3189 | |
| 3190 | loc = sreloc->contents; |
| 3191 | loc += sreloc->reloc_count++ * RELOC_SIZE (globals); |
| 3192 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 3193 | |
| 3194 | /* If this reloc is against an external symbol, we do not want to |
| 3195 | fiddle with the addend. Otherwise, we need to include the symbol |
| 3196 | value so that it becomes an addend for the dynamic reloc. */ |
| 3197 | if (! relocate) |
| 3198 | return bfd_reloc_ok; |
| 3199 | |
| 3200 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3201 | contents, rel->r_offset, value, |
| 3202 | (bfd_vma) 0); |
| 3203 | } |
| 3204 | else switch (r_type) |
| 3205 | { |
| 3206 | case R_ARM_ABS12: |
| 3207 | return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend); |
| 3208 | |
| 3209 | case R_ARM_XPC25: /* Arm BLX instruction. */ |
| 3210 | case R_ARM_CALL: |
| 3211 | case R_ARM_JUMP24: |
| 3212 | case R_ARM_PC24: /* Arm B/BL instruction */ |
| 3213 | case R_ARM_PLT32: |
| 3214 | if (r_type == R_ARM_XPC25) |
| 3215 | { |
| 3216 | /* Check for Arm calling Arm function. */ |
| 3217 | /* FIXME: Should we translate the instruction into a BL |
| 3218 | instruction instead ? */ |
| 3219 | if (sym_flags != STT_ARM_TFUNC) |
| 3220 | (*_bfd_error_handler) |
| 3221 | (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."), |
| 3222 | input_bfd, |
| 3223 | h ? h->root.root.string : "(local)"); |
| 3224 | } |
| 3225 | else if (r_type != R_ARM_CALL || !globals->use_blx) |
| 3226 | { |
| 3227 | /* Check for Arm calling Thumb function. */ |
| 3228 | if (sym_flags == STT_ARM_TFUNC) |
| 3229 | { |
| 3230 | elf32_arm_to_thumb_stub (info, sym_name, input_bfd, |
| 3231 | output_bfd, input_section, |
| 3232 | hit_data, sym_sec, rel->r_offset, |
| 3233 | signed_addend, value); |
| 3234 | return bfd_reloc_ok; |
| 3235 | } |
| 3236 | } |
| 3237 | |
| 3238 | /* The ARM ELF ABI says that this reloc is computed as: S - P + A |
| 3239 | where: |
| 3240 | S is the address of the symbol in the relocation. |
| 3241 | P is address of the instruction being relocated. |
| 3242 | A is the addend (extracted from the instruction) in bytes. |
| 3243 | |
| 3244 | S is held in 'value'. |
| 3245 | P is the base address of the section containing the |
| 3246 | instruction plus the offset of the reloc into that |
| 3247 | section, ie: |
| 3248 | (input_section->output_section->vma + |
| 3249 | input_section->output_offset + |
| 3250 | rel->r_offset). |
| 3251 | A is the addend, converted into bytes, ie: |
| 3252 | (signed_addend * 4) |
| 3253 | |
| 3254 | Note: None of these operations have knowledge of the pipeline |
| 3255 | size of the processor, thus it is up to the assembler to |
| 3256 | encode this information into the addend. */ |
| 3257 | value -= (input_section->output_section->vma |
| 3258 | + input_section->output_offset); |
| 3259 | value -= rel->r_offset; |
| 3260 | if (globals->use_rel) |
| 3261 | value += (signed_addend << howto->size); |
| 3262 | else |
| 3263 | /* RELA addends do not have to be adjusted by howto->size. */ |
| 3264 | value += signed_addend; |
| 3265 | |
| 3266 | signed_addend = value; |
| 3267 | signed_addend >>= howto->rightshift; |
| 3268 | |
| 3269 | /* It is not an error for an undefined weak reference to be |
| 3270 | out of range. Any program that branches to such a symbol |
| 3271 | is going to crash anyway, so there is no point worrying |
| 3272 | about getting the destination exactly right. */ |
| 3273 | if (! h || h->root.type != bfd_link_hash_undefweak) |
| 3274 | { |
| 3275 | /* Perform a signed range check. */ |
| 3276 | if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1)) |
| 3277 | || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) |
| 3278 | return bfd_reloc_overflow; |
| 3279 | } |
| 3280 | |
| 3281 | addend = (value & 2); |
| 3282 | |
| 3283 | value = (signed_addend & howto->dst_mask) |
| 3284 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); |
| 3285 | |
| 3286 | /* Set the H bit in the BLX instruction. */ |
| 3287 | if (sym_flags == STT_ARM_TFUNC) |
| 3288 | { |
| 3289 | if (addend) |
| 3290 | value |= (1 << 24); |
| 3291 | else |
| 3292 | value &= ~(bfd_vma)(1 << 24); |
| 3293 | } |
| 3294 | if (r_type == R_ARM_CALL) |
| 3295 | { |
| 3296 | /* Select the correct instruction (BL or BLX). */ |
| 3297 | if (sym_flags == STT_ARM_TFUNC) |
| 3298 | value |= (1 << 28); |
| 3299 | else |
| 3300 | { |
| 3301 | value &= ~(bfd_vma)(1 << 28); |
| 3302 | value |= (1 << 24); |
| 3303 | } |
| 3304 | } |
| 3305 | break; |
| 3306 | |
| 3307 | case R_ARM_ABS32: |
| 3308 | value += addend; |
| 3309 | if (sym_flags == STT_ARM_TFUNC) |
| 3310 | value |= 1; |
| 3311 | break; |
| 3312 | |
| 3313 | case R_ARM_REL32: |
| 3314 | value += addend; |
| 3315 | if (sym_flags == STT_ARM_TFUNC) |
| 3316 | value |= 1; |
| 3317 | value -= (input_section->output_section->vma |
| 3318 | + input_section->output_offset + rel->r_offset); |
| 3319 | break; |
| 3320 | |
| 3321 | case R_ARM_PREL31: |
| 3322 | value -= (input_section->output_section->vma |
| 3323 | + input_section->output_offset + rel->r_offset); |
| 3324 | value += signed_addend; |
| 3325 | if (! h || h->root.type != bfd_link_hash_undefweak) |
| 3326 | { |
| 3327 | /* Check for overflow */ |
| 3328 | if ((value ^ (value >> 1)) & (1 << 30)) |
| 3329 | return bfd_reloc_overflow; |
| 3330 | } |
| 3331 | value &= 0x7fffffff; |
| 3332 | value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000); |
| 3333 | if (sym_flags == STT_ARM_TFUNC) |
| 3334 | value |= 1; |
| 3335 | break; |
| 3336 | } |
| 3337 | |
| 3338 | bfd_put_32 (input_bfd, value, hit_data); |
| 3339 | return bfd_reloc_ok; |
| 3340 | |
| 3341 | case R_ARM_ABS8: |
| 3342 | value += addend; |
| 3343 | if ((long) value > 0x7f || (long) value < -0x80) |
| 3344 | return bfd_reloc_overflow; |
| 3345 | |
| 3346 | bfd_put_8 (input_bfd, value, hit_data); |
| 3347 | return bfd_reloc_ok; |
| 3348 | |
| 3349 | case R_ARM_ABS16: |
| 3350 | value += addend; |
| 3351 | |
| 3352 | if ((long) value > 0x7fff || (long) value < -0x8000) |
| 3353 | return bfd_reloc_overflow; |
| 3354 | |
| 3355 | bfd_put_16 (input_bfd, value, hit_data); |
| 3356 | return bfd_reloc_ok; |
| 3357 | |
| 3358 | case R_ARM_THM_ABS5: |
| 3359 | /* Support ldr and str instructions for the thumb. */ |
| 3360 | if (globals->use_rel) |
| 3361 | { |
| 3362 | /* Need to refetch addend. */ |
| 3363 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; |
| 3364 | /* ??? Need to determine shift amount from operand size. */ |
| 3365 | addend >>= howto->rightshift; |
| 3366 | } |
| 3367 | value += addend; |
| 3368 | |
| 3369 | /* ??? Isn't value unsigned? */ |
| 3370 | if ((long) value > 0x1f || (long) value < -0x10) |
| 3371 | return bfd_reloc_overflow; |
| 3372 | |
| 3373 | /* ??? Value needs to be properly shifted into place first. */ |
| 3374 | value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f; |
| 3375 | bfd_put_16 (input_bfd, value, hit_data); |
| 3376 | return bfd_reloc_ok; |
| 3377 | |
| 3378 | case R_ARM_THM_XPC22: |
| 3379 | case R_ARM_THM_CALL: |
| 3380 | /* Thumb BL (branch long instruction). */ |
| 3381 | { |
| 3382 | bfd_vma relocation; |
| 3383 | bfd_boolean overflow = FALSE; |
| 3384 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); |
| 3385 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); |
| 3386 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
| 3387 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
| 3388 | bfd_vma check; |
| 3389 | bfd_signed_vma signed_check; |
| 3390 | |
| 3391 | /* Need to refetch the addend and squish the two 11 bit pieces |
| 3392 | together. */ |
| 3393 | if (globals->use_rel) |
| 3394 | { |
| 3395 | bfd_vma upper = upper_insn & 0x7ff; |
| 3396 | bfd_vma lower = lower_insn & 0x7ff; |
| 3397 | upper = (upper ^ 0x400) - 0x400; /* Sign extend. */ |
| 3398 | addend = (upper << 12) | (lower << 1); |
| 3399 | signed_addend = addend; |
| 3400 | } |
| 3401 | |
| 3402 | if (r_type == R_ARM_THM_XPC22) |
| 3403 | { |
| 3404 | /* Check for Thumb to Thumb call. */ |
| 3405 | /* FIXME: Should we translate the instruction into a BL |
| 3406 | instruction instead ? */ |
| 3407 | if (sym_flags == STT_ARM_TFUNC) |
| 3408 | (*_bfd_error_handler) |
| 3409 | (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."), |
| 3410 | input_bfd, |
| 3411 | h ? h->root.root.string : "(local)"); |
| 3412 | } |
| 3413 | else |
| 3414 | { |
| 3415 | /* If it is not a call to Thumb, assume call to Arm. |
| 3416 | If it is a call relative to a section name, then it is not a |
| 3417 | function call at all, but rather a long jump. Calls through |
| 3418 | the PLT do not require stubs. */ |
| 3419 | if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION |
| 3420 | && (h == NULL || splt == NULL |
| 3421 | || h->plt.offset == (bfd_vma) -1)) |
| 3422 | { |
| 3423 | if (globals->use_blx) |
| 3424 | { |
| 3425 | /* Convert BL to BLX. */ |
| 3426 | lower_insn = (lower_insn & ~0x1000) | 0x0800; |
| 3427 | } |
| 3428 | else if (elf32_thumb_to_arm_stub |
| 3429 | (info, sym_name, input_bfd, output_bfd, input_section, |
| 3430 | hit_data, sym_sec, rel->r_offset, signed_addend, value)) |
| 3431 | return bfd_reloc_ok; |
| 3432 | else |
| 3433 | return bfd_reloc_dangerous; |
| 3434 | } |
| 3435 | else if (sym_flags == STT_ARM_TFUNC && globals->use_blx) |
| 3436 | { |
| 3437 | /* Make sure this is a BL. */ |
| 3438 | lower_insn |= 0x1800; |
| 3439 | } |
| 3440 | } |
| 3441 | |
| 3442 | /* Handle calls via the PLT. */ |
| 3443 | if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) |
| 3444 | { |
| 3445 | value = (splt->output_section->vma |
| 3446 | + splt->output_offset |
| 3447 | + h->plt.offset); |
| 3448 | if (globals->use_blx) |
| 3449 | { |
| 3450 | /* If the Thumb BLX instruction is available, convert the |
| 3451 | BL to a BLX instruction to call the ARM-mode PLT entry. */ |
| 3452 | lower_insn = (lower_insn & ~0x1000) | 0x0800; |
| 3453 | } |
| 3454 | else |
| 3455 | /* Target the Thumb stub before the ARM PLT entry. */ |
| 3456 | value -= PLT_THUMB_STUB_SIZE; |
| 3457 | *unresolved_reloc_p = FALSE; |
| 3458 | } |
| 3459 | |
| 3460 | relocation = value + signed_addend; |
| 3461 | |
| 3462 | relocation -= (input_section->output_section->vma |
| 3463 | + input_section->output_offset |
| 3464 | + rel->r_offset); |
| 3465 | |
| 3466 | check = relocation >> howto->rightshift; |
| 3467 | |
| 3468 | /* If this is a signed value, the rightshift just dropped |
| 3469 | leading 1 bits (assuming twos complement). */ |
| 3470 | if ((bfd_signed_vma) relocation >= 0) |
| 3471 | signed_check = check; |
| 3472 | else |
| 3473 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); |
| 3474 | |
| 3475 | /* Assumes two's complement. */ |
| 3476 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 3477 | overflow = TRUE; |
| 3478 | |
| 3479 | if ((lower_insn & 0x1800) == 0x0800) |
| 3480 | /* For a BLX instruction, make sure that the relocation is rounded up |
| 3481 | to a word boundary. This follows the semantics of the instruction |
| 3482 | which specifies that bit 1 of the target address will come from bit |
| 3483 | 1 of the base address. */ |
| 3484 | relocation = (relocation + 2) & ~ 3; |
| 3485 | |
| 3486 | /* Put RELOCATION back into the insn. */ |
| 3487 | upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff); |
| 3488 | lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff); |
| 3489 | |
| 3490 | /* Put the relocated value back in the object file: */ |
| 3491 | bfd_put_16 (input_bfd, upper_insn, hit_data); |
| 3492 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); |
| 3493 | |
| 3494 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); |
| 3495 | } |
| 3496 | break; |
| 3497 | |
| 3498 | case R_ARM_THM_JUMP24: |
| 3499 | /* Thumb32 unconditional branch instruction. */ |
| 3500 | { |
| 3501 | bfd_vma relocation; |
| 3502 | bfd_boolean overflow = FALSE; |
| 3503 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); |
| 3504 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); |
| 3505 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
| 3506 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
| 3507 | bfd_vma check; |
| 3508 | bfd_signed_vma signed_check; |
| 3509 | |
| 3510 | /* Need to refetch the addend, reconstruct the top three bits, and glue the |
| 3511 | two pieces together. */ |
| 3512 | if (globals->use_rel) |
| 3513 | { |
| 3514 | bfd_vma S = (upper_insn & 0x0400) >> 10; |
| 3515 | bfd_vma hi = (upper_insn & 0x03ff); |
| 3516 | bfd_vma I1 = (lower_insn & 0x2000) >> 13; |
| 3517 | bfd_vma I2 = (lower_insn & 0x0800) >> 11; |
| 3518 | bfd_vma lo = (lower_insn & 0x07ff); |
| 3519 | |
| 3520 | I1 = !(I1 ^ S); |
| 3521 | I2 = !(I2 ^ S); |
| 3522 | S = !S; |
| 3523 | |
| 3524 | signed_addend = (S << 24) | (I1 << 23) | (I2 << 22) | (hi << 12) | (lo << 1); |
| 3525 | signed_addend -= (1 << 24); /* Sign extend. */ |
| 3526 | } |
| 3527 | |
| 3528 | /* ??? Should handle interworking? GCC might someday try to |
| 3529 | use this for tail calls. */ |
| 3530 | |
| 3531 | relocation = value + signed_addend; |
| 3532 | relocation -= (input_section->output_section->vma |
| 3533 | + input_section->output_offset |
| 3534 | + rel->r_offset); |
| 3535 | |
| 3536 | check = relocation >> howto->rightshift; |
| 3537 | |
| 3538 | /* If this is a signed value, the rightshift just dropped |
| 3539 | leading 1 bits (assuming twos complement). */ |
| 3540 | if ((bfd_signed_vma) relocation >= 0) |
| 3541 | signed_check = check; |
| 3542 | else |
| 3543 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); |
| 3544 | |
| 3545 | /* Assumes two's complement. */ |
| 3546 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 3547 | overflow = TRUE; |
| 3548 | |
| 3549 | /* Put RELOCATION back into the insn. */ |
| 3550 | { |
| 3551 | bfd_vma S = (relocation & 0x01000000) >> 24; |
| 3552 | bfd_vma I1 = (relocation & 0x00800000) >> 23; |
| 3553 | bfd_vma I2 = (relocation & 0x00400000) >> 22; |
| 3554 | bfd_vma hi = (relocation & 0x003ff000) >> 12; |
| 3555 | bfd_vma lo = (relocation & 0x00000ffe) >> 1; |
| 3556 | |
| 3557 | I1 = !(I1 ^ S); |
| 3558 | I2 = !(I2 ^ S); |
| 3559 | |
| 3560 | upper_insn = (upper_insn & (bfd_vma) 0xf800) | (S << 10) | hi; |
| 3561 | lower_insn = (lower_insn & (bfd_vma) 0xd000) | (I1 << 13) | (I2 << 11) | lo; |
| 3562 | } |
| 3563 | |
| 3564 | /* Put the relocated value back in the object file: */ |
| 3565 | bfd_put_16 (input_bfd, upper_insn, hit_data); |
| 3566 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); |
| 3567 | |
| 3568 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); |
| 3569 | } |
| 3570 | |
| 3571 | case R_ARM_THM_JUMP19: |
| 3572 | /* Thumb32 conditional branch instruction. */ |
| 3573 | { |
| 3574 | bfd_vma relocation; |
| 3575 | bfd_boolean overflow = FALSE; |
| 3576 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); |
| 3577 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); |
| 3578 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
| 3579 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
| 3580 | bfd_vma check; |
| 3581 | bfd_signed_vma signed_check; |
| 3582 | |
| 3583 | /* Need to refetch the addend, reconstruct the top three bits, |
| 3584 | and squish the two 11 bit pieces together. */ |
| 3585 | if (globals->use_rel) |
| 3586 | { |
| 3587 | bfd_vma S = (upper_insn & 0x0400) >> 10; |
| 3588 | bfd_vma upper = (upper_insn & 0x001f); |
| 3589 | bfd_vma J1 = (lower_insn & 0x2000) >> 13; |
| 3590 | bfd_vma J2 = (lower_insn & 0x0800) >> 11; |
| 3591 | bfd_vma lower = (lower_insn & 0x07ff); |
| 3592 | |
| 3593 | upper |= J2 << 6; |
| 3594 | upper |= J1 << 7; |
| 3595 | upper |= ~S << 8; |
| 3596 | upper -= 0x0100; /* Sign extend. */ |
| 3597 | |
| 3598 | addend = (upper << 12) | (lower << 1); |
| 3599 | signed_addend = addend; |
| 3600 | } |
| 3601 | |
| 3602 | /* ??? Should handle interworking? GCC might someday try to |
| 3603 | use this for tail calls. */ |
| 3604 | |
| 3605 | relocation = value + signed_addend; |
| 3606 | relocation -= (input_section->output_section->vma |
| 3607 | + input_section->output_offset |
| 3608 | + rel->r_offset); |
| 3609 | |
| 3610 | check = relocation >> howto->rightshift; |
| 3611 | |
| 3612 | /* If this is a signed value, the rightshift just dropped |
| 3613 | leading 1 bits (assuming twos complement). */ |
| 3614 | if ((bfd_signed_vma) relocation >= 0) |
| 3615 | signed_check = check; |
| 3616 | else |
| 3617 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); |
| 3618 | |
| 3619 | /* Assumes two's complement. */ |
| 3620 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 3621 | overflow = TRUE; |
| 3622 | |
| 3623 | /* Put RELOCATION back into the insn. */ |
| 3624 | { |
| 3625 | bfd_vma S = (relocation & 0x00100000) >> 20; |
| 3626 | bfd_vma J2 = (relocation & 0x00080000) >> 19; |
| 3627 | bfd_vma J1 = (relocation & 0x00040000) >> 18; |
| 3628 | bfd_vma hi = (relocation & 0x0003f000) >> 12; |
| 3629 | bfd_vma lo = (relocation & 0x00000ffe) >> 1; |
| 3630 | |
| 3631 | upper_insn = (upper_insn & 0xfb30) | (S << 10) | hi; |
| 3632 | lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo; |
| 3633 | } |
| 3634 | |
| 3635 | /* Put the relocated value back in the object file: */ |
| 3636 | bfd_put_16 (input_bfd, upper_insn, hit_data); |
| 3637 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); |
| 3638 | |
| 3639 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); |
| 3640 | } |
| 3641 | |
| 3642 | case R_ARM_THM_JUMP11: |
| 3643 | case R_ARM_THM_JUMP8: |
| 3644 | case R_ARM_THM_JUMP6: |
| 3645 | /* Thumb B (branch) instruction). */ |
| 3646 | { |
| 3647 | bfd_signed_vma relocation; |
| 3648 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; |
| 3649 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
| 3650 | bfd_signed_vma signed_check; |
| 3651 | |
| 3652 | /* CZB cannot jump backward. */ |
| 3653 | if (r_type == R_ARM_THM_JUMP6) |
| 3654 | reloc_signed_min = 0; |
| 3655 | |
| 3656 | if (globals->use_rel) |
| 3657 | { |
| 3658 | /* Need to refetch addend. */ |
| 3659 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; |
| 3660 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 3661 | { |
| 3662 | signed_addend = -1; |
| 3663 | signed_addend &= ~ howto->src_mask; |
| 3664 | signed_addend |= addend; |
| 3665 | } |
| 3666 | else |
| 3667 | signed_addend = addend; |
| 3668 | /* The value in the insn has been right shifted. We need to |
| 3669 | undo this, so that we can perform the address calculation |
| 3670 | in terms of bytes. */ |
| 3671 | signed_addend <<= howto->rightshift; |
| 3672 | } |
| 3673 | relocation = value + signed_addend; |
| 3674 | |
| 3675 | relocation -= (input_section->output_section->vma |
| 3676 | + input_section->output_offset |
| 3677 | + rel->r_offset); |
| 3678 | |
| 3679 | relocation >>= howto->rightshift; |
| 3680 | signed_check = relocation; |
| 3681 | |
| 3682 | if (r_type == R_ARM_THM_JUMP6) |
| 3683 | relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3); |
| 3684 | else |
| 3685 | relocation &= howto->dst_mask; |
| 3686 | relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask)); |
| 3687 | |
| 3688 | bfd_put_16 (input_bfd, relocation, hit_data); |
| 3689 | |
| 3690 | /* Assumes two's complement. */ |
| 3691 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 3692 | return bfd_reloc_overflow; |
| 3693 | |
| 3694 | return bfd_reloc_ok; |
| 3695 | } |
| 3696 | |
| 3697 | case R_ARM_ALU_PCREL7_0: |
| 3698 | case R_ARM_ALU_PCREL15_8: |
| 3699 | case R_ARM_ALU_PCREL23_15: |
| 3700 | { |
| 3701 | bfd_vma insn; |
| 3702 | bfd_vma relocation; |
| 3703 | |
| 3704 | insn = bfd_get_32 (input_bfd, hit_data); |
| 3705 | if (globals->use_rel) |
| 3706 | { |
| 3707 | /* Extract the addend. */ |
| 3708 | addend = (insn & 0xff) << ((insn & 0xf00) >> 7); |
| 3709 | signed_addend = addend; |
| 3710 | } |
| 3711 | relocation = value + signed_addend; |
| 3712 | |
| 3713 | relocation -= (input_section->output_section->vma |
| 3714 | + input_section->output_offset |
| 3715 | + rel->r_offset); |
| 3716 | insn = (insn & ~0xfff) |
| 3717 | | ((howto->bitpos << 7) & 0xf00) |
| 3718 | | ((relocation >> howto->bitpos) & 0xff); |
| 3719 | bfd_put_32 (input_bfd, value, hit_data); |
| 3720 | } |
| 3721 | return bfd_reloc_ok; |
| 3722 | |
| 3723 | case R_ARM_GNU_VTINHERIT: |
| 3724 | case R_ARM_GNU_VTENTRY: |
| 3725 | return bfd_reloc_ok; |
| 3726 | |
| 3727 | case R_ARM_GOTOFF32: |
| 3728 | /* Relocation is relative to the start of the |
| 3729 | global offset table. */ |
| 3730 | |
| 3731 | BFD_ASSERT (sgot != NULL); |
| 3732 | if (sgot == NULL) |
| 3733 | return bfd_reloc_notsupported; |
| 3734 | |
| 3735 | /* If we are addressing a Thumb function, we need to adjust the |
| 3736 | address by one, so that attempts to call the function pointer will |
| 3737 | correctly interpret it as Thumb code. */ |
| 3738 | if (sym_flags == STT_ARM_TFUNC) |
| 3739 | value += 1; |
| 3740 | |
| 3741 | /* Note that sgot->output_offset is not involved in this |
| 3742 | calculation. We always want the start of .got. If we |
| 3743 | define _GLOBAL_OFFSET_TABLE in a different way, as is |
| 3744 | permitted by the ABI, we might have to change this |
| 3745 | calculation. */ |
| 3746 | value -= sgot->output_section->vma; |
| 3747 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3748 | contents, rel->r_offset, value, |
| 3749 | rel->r_addend); |
| 3750 | |
| 3751 | case R_ARM_GOTPC: |
| 3752 | /* Use global offset table as symbol value. */ |
| 3753 | BFD_ASSERT (sgot != NULL); |
| 3754 | |
| 3755 | if (sgot == NULL) |
| 3756 | return bfd_reloc_notsupported; |
| 3757 | |
| 3758 | *unresolved_reloc_p = FALSE; |
| 3759 | value = sgot->output_section->vma; |
| 3760 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3761 | contents, rel->r_offset, value, |
| 3762 | rel->r_addend); |
| 3763 | |
| 3764 | case R_ARM_GOT32: |
| 3765 | case R_ARM_GOT_PREL: |
| 3766 | /* Relocation is to the entry for this symbol in the |
| 3767 | global offset table. */ |
| 3768 | if (sgot == NULL) |
| 3769 | return bfd_reloc_notsupported; |
| 3770 | |
| 3771 | if (h != NULL) |
| 3772 | { |
| 3773 | bfd_vma off; |
| 3774 | bfd_boolean dyn; |
| 3775 | |
| 3776 | off = h->got.offset; |
| 3777 | BFD_ASSERT (off != (bfd_vma) -1); |
| 3778 | dyn = globals->root.dynamic_sections_created; |
| 3779 | |
| 3780 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 3781 | || (info->shared |
| 3782 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 3783 | || (ELF_ST_VISIBILITY (h->other) |
| 3784 | && h->root.type == bfd_link_hash_undefweak)) |
| 3785 | { |
| 3786 | /* This is actually a static link, or it is a -Bsymbolic link |
| 3787 | and the symbol is defined locally. We must initialize this |
| 3788 | entry in the global offset table. Since the offset must |
| 3789 | always be a multiple of 4, we use the least significant bit |
| 3790 | to record whether we have initialized it already. |
| 3791 | |
| 3792 | When doing a dynamic link, we create a .rel(a).got relocation |
| 3793 | entry to initialize the value. This is done in the |
| 3794 | finish_dynamic_symbol routine. */ |
| 3795 | if ((off & 1) != 0) |
| 3796 | off &= ~1; |
| 3797 | else |
| 3798 | { |
| 3799 | /* If we are addressing a Thumb function, we need to |
| 3800 | adjust the address by one, so that attempts to |
| 3801 | call the function pointer will correctly |
| 3802 | interpret it as Thumb code. */ |
| 3803 | if (sym_flags == STT_ARM_TFUNC) |
| 3804 | value |= 1; |
| 3805 | |
| 3806 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
| 3807 | h->got.offset |= 1; |
| 3808 | } |
| 3809 | } |
| 3810 | else |
| 3811 | *unresolved_reloc_p = FALSE; |
| 3812 | |
| 3813 | value = sgot->output_offset + off; |
| 3814 | } |
| 3815 | else |
| 3816 | { |
| 3817 | bfd_vma off; |
| 3818 | |
| 3819 | BFD_ASSERT (local_got_offsets != NULL && |
| 3820 | local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 3821 | |
| 3822 | off = local_got_offsets[r_symndx]; |
| 3823 | |
| 3824 | /* The offset must always be a multiple of 4. We use the |
| 3825 | least significant bit to record whether we have already |
| 3826 | generated the necessary reloc. */ |
| 3827 | if ((off & 1) != 0) |
| 3828 | off &= ~1; |
| 3829 | else |
| 3830 | { |
| 3831 | /* If we are addressing a Thumb function, we need to |
| 3832 | adjust the address by one, so that attempts to |
| 3833 | call the function pointer will correctly |
| 3834 | interpret it as Thumb code. */ |
| 3835 | if (sym_flags == STT_ARM_TFUNC) |
| 3836 | value |= 1; |
| 3837 | |
| 3838 | if (globals->use_rel) |
| 3839 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
| 3840 | |
| 3841 | if (info->shared) |
| 3842 | { |
| 3843 | asection * srelgot; |
| 3844 | Elf_Internal_Rela outrel; |
| 3845 | bfd_byte *loc; |
| 3846 | |
| 3847 | srelgot = (bfd_get_section_by_name |
| 3848 | (dynobj, RELOC_SECTION (globals, ".got"))); |
| 3849 | BFD_ASSERT (srelgot != NULL); |
| 3850 | |
| 3851 | outrel.r_addend = addend + value; |
| 3852 | outrel.r_offset = (sgot->output_section->vma |
| 3853 | + sgot->output_offset |
| 3854 | + off); |
| 3855 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); |
| 3856 | loc = srelgot->contents; |
| 3857 | loc += srelgot->reloc_count++ * RELOC_SIZE (globals); |
| 3858 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 3859 | } |
| 3860 | |
| 3861 | local_got_offsets[r_symndx] |= 1; |
| 3862 | } |
| 3863 | |
| 3864 | value = sgot->output_offset + off; |
| 3865 | } |
| 3866 | if (r_type != R_ARM_GOT32) |
| 3867 | value += sgot->output_section->vma; |
| 3868 | |
| 3869 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3870 | contents, rel->r_offset, value, |
| 3871 | rel->r_addend); |
| 3872 | |
| 3873 | case R_ARM_TLS_LDO32: |
| 3874 | value = value - dtpoff_base (info); |
| 3875 | |
| 3876 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3877 | contents, rel->r_offset, value, |
| 3878 | rel->r_addend); |
| 3879 | |
| 3880 | case R_ARM_TLS_LDM32: |
| 3881 | { |
| 3882 | bfd_vma off; |
| 3883 | |
| 3884 | if (globals->sgot == NULL) |
| 3885 | abort (); |
| 3886 | |
| 3887 | off = globals->tls_ldm_got.offset; |
| 3888 | |
| 3889 | if ((off & 1) != 0) |
| 3890 | off &= ~1; |
| 3891 | else |
| 3892 | { |
| 3893 | /* If we don't know the module number, create a relocation |
| 3894 | for it. */ |
| 3895 | if (info->shared) |
| 3896 | { |
| 3897 | Elf_Internal_Rela outrel; |
| 3898 | bfd_byte *loc; |
| 3899 | |
| 3900 | if (globals->srelgot == NULL) |
| 3901 | abort (); |
| 3902 | |
| 3903 | outrel.r_addend = 0; |
| 3904 | outrel.r_offset = (globals->sgot->output_section->vma |
| 3905 | + globals->sgot->output_offset + off); |
| 3906 | outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32); |
| 3907 | |
| 3908 | if (globals->use_rel) |
| 3909 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 3910 | globals->sgot->contents + off); |
| 3911 | |
| 3912 | loc = globals->srelgot->contents; |
| 3913 | loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals); |
| 3914 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 3915 | } |
| 3916 | else |
| 3917 | bfd_put_32 (output_bfd, 1, globals->sgot->contents + off); |
| 3918 | |
| 3919 | globals->tls_ldm_got.offset |= 1; |
| 3920 | } |
| 3921 | |
| 3922 | value = globals->sgot->output_section->vma + globals->sgot->output_offset + off |
| 3923 | - (input_section->output_section->vma + input_section->output_offset + rel->r_offset); |
| 3924 | |
| 3925 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 3926 | contents, rel->r_offset, value, |
| 3927 | rel->r_addend); |
| 3928 | } |
| 3929 | |
| 3930 | case R_ARM_TLS_GD32: |
| 3931 | case R_ARM_TLS_IE32: |
| 3932 | { |
| 3933 | bfd_vma off; |
| 3934 | int indx; |
| 3935 | char tls_type; |
| 3936 | |
| 3937 | if (globals->sgot == NULL) |
| 3938 | abort (); |
| 3939 | |
| 3940 | indx = 0; |
| 3941 | if (h != NULL) |
| 3942 | { |
| 3943 | bfd_boolean dyn; |
| 3944 | dyn = globals->root.dynamic_sections_created; |
| 3945 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 3946 | && (!info->shared |
| 3947 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 3948 | { |
| 3949 | *unresolved_reloc_p = FALSE; |
| 3950 | indx = h->dynindx; |
| 3951 | } |
| 3952 | off = h->got.offset; |
| 3953 | tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type; |
| 3954 | } |
| 3955 | else |
| 3956 | { |
| 3957 | if (local_got_offsets == NULL) |
| 3958 | abort (); |
| 3959 | off = local_got_offsets[r_symndx]; |
| 3960 | tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx]; |
| 3961 | } |
| 3962 | |
| 3963 | if (tls_type == GOT_UNKNOWN) |
| 3964 | abort (); |
| 3965 | |
| 3966 | if ((off & 1) != 0) |
| 3967 | off &= ~1; |
| 3968 | else |
| 3969 | { |
| 3970 | bfd_boolean need_relocs = FALSE; |
| 3971 | Elf_Internal_Rela outrel; |
| 3972 | bfd_byte *loc = NULL; |
| 3973 | int cur_off = off; |
| 3974 | |
| 3975 | /* The GOT entries have not been initialized yet. Do it |
| 3976 | now, and emit any relocations. If both an IE GOT and a |
| 3977 | GD GOT are necessary, we emit the GD first. */ |
| 3978 | |
| 3979 | if ((info->shared || indx != 0) |
| 3980 | && (h == NULL |
| 3981 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 3982 | || h->root.type != bfd_link_hash_undefweak)) |
| 3983 | { |
| 3984 | need_relocs = TRUE; |
| 3985 | if (globals->srelgot == NULL) |
| 3986 | abort (); |
| 3987 | loc = globals->srelgot->contents; |
| 3988 | loc += globals->srelgot->reloc_count * RELOC_SIZE (globals); |
| 3989 | } |
| 3990 | |
| 3991 | if (tls_type & GOT_TLS_GD) |
| 3992 | { |
| 3993 | if (need_relocs) |
| 3994 | { |
| 3995 | outrel.r_addend = 0; |
| 3996 | outrel.r_offset = (globals->sgot->output_section->vma |
| 3997 | + globals->sgot->output_offset |
| 3998 | + cur_off); |
| 3999 | outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32); |
| 4000 | |
| 4001 | if (globals->use_rel) |
| 4002 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 4003 | globals->sgot->contents + cur_off); |
| 4004 | |
| 4005 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 4006 | globals->srelgot->reloc_count++; |
| 4007 | loc += RELOC_SIZE (globals); |
| 4008 | |
| 4009 | if (indx == 0) |
| 4010 | bfd_put_32 (output_bfd, value - dtpoff_base (info), |
| 4011 | globals->sgot->contents + cur_off + 4); |
| 4012 | else |
| 4013 | { |
| 4014 | outrel.r_addend = 0; |
| 4015 | outrel.r_info = ELF32_R_INFO (indx, |
| 4016 | R_ARM_TLS_DTPOFF32); |
| 4017 | outrel.r_offset += 4; |
| 4018 | |
| 4019 | if (globals->use_rel) |
| 4020 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 4021 | globals->sgot->contents + cur_off + 4); |
| 4022 | |
| 4023 | |
| 4024 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 4025 | globals->srelgot->reloc_count++; |
| 4026 | loc += RELOC_SIZE (globals); |
| 4027 | } |
| 4028 | } |
| 4029 | else |
| 4030 | { |
| 4031 | /* If we are not emitting relocations for a |
| 4032 | general dynamic reference, then we must be in a |
| 4033 | static link or an executable link with the |
| 4034 | symbol binding locally. Mark it as belonging |
| 4035 | to module 1, the executable. */ |
| 4036 | bfd_put_32 (output_bfd, 1, |
| 4037 | globals->sgot->contents + cur_off); |
| 4038 | bfd_put_32 (output_bfd, value - dtpoff_base (info), |
| 4039 | globals->sgot->contents + cur_off + 4); |
| 4040 | } |
| 4041 | |
| 4042 | cur_off += 8; |
| 4043 | } |
| 4044 | |
| 4045 | if (tls_type & GOT_TLS_IE) |
| 4046 | { |
| 4047 | if (need_relocs) |
| 4048 | { |
| 4049 | if (indx == 0) |
| 4050 | outrel.r_addend = value - dtpoff_base (info); |
| 4051 | else |
| 4052 | outrel.r_addend = 0; |
| 4053 | outrel.r_offset = (globals->sgot->output_section->vma |
| 4054 | + globals->sgot->output_offset |
| 4055 | + cur_off); |
| 4056 | outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32); |
| 4057 | |
| 4058 | if (globals->use_rel) |
| 4059 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 4060 | globals->sgot->contents + cur_off); |
| 4061 | |
| 4062 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 4063 | globals->srelgot->reloc_count++; |
| 4064 | loc += RELOC_SIZE (globals); |
| 4065 | } |
| 4066 | else |
| 4067 | bfd_put_32 (output_bfd, tpoff (info, value), |
| 4068 | globals->sgot->contents + cur_off); |
| 4069 | cur_off += 4; |
| 4070 | } |
| 4071 | |
| 4072 | if (h != NULL) |
| 4073 | h->got.offset |= 1; |
| 4074 | else |
| 4075 | local_got_offsets[r_symndx] |= 1; |
| 4076 | } |
| 4077 | |
| 4078 | if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32) |
| 4079 | off += 8; |
| 4080 | value = globals->sgot->output_section->vma + globals->sgot->output_offset + off |
| 4081 | - (input_section->output_section->vma + input_section->output_offset + rel->r_offset); |
| 4082 | |
| 4083 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 4084 | contents, rel->r_offset, value, |
| 4085 | rel->r_addend); |
| 4086 | } |
| 4087 | |
| 4088 | case R_ARM_TLS_LE32: |
| 4089 | if (info->shared) |
| 4090 | { |
| 4091 | (*_bfd_error_handler) |
| 4092 | (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"), |
| 4093 | input_bfd, input_section, |
| 4094 | (long) rel->r_offset, howto->name); |
| 4095 | return FALSE; |
| 4096 | } |
| 4097 | else |
| 4098 | value = tpoff (info, value); |
| 4099 | |
| 4100 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 4101 | contents, rel->r_offset, value, |
| 4102 | rel->r_addend); |
| 4103 | |
| 4104 | case R_ARM_V4BX: |
| 4105 | if (globals->fix_v4bx) |
| 4106 | { |
| 4107 | bfd_vma insn = bfd_get_32 (input_bfd, hit_data); |
| 4108 | |
| 4109 | /* Ensure that we have a BX instruction. */ |
| 4110 | BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10); |
| 4111 | |
| 4112 | /* Preserve Rm (lowest four bits) and the condition code |
| 4113 | (highest four bits). Other bits encode MOV PC,Rm. */ |
| 4114 | insn = (insn & 0xf000000f) | 0x01a0f000; |
| 4115 | |
| 4116 | bfd_put_32 (input_bfd, insn, hit_data); |
| 4117 | } |
| 4118 | return bfd_reloc_ok; |
| 4119 | |
| 4120 | case R_ARM_MOVW_ABS_NC: |
| 4121 | case R_ARM_MOVT_ABS: |
| 4122 | case R_ARM_MOVW_PREL_NC: |
| 4123 | case R_ARM_MOVT_PREL: |
| 4124 | { |
| 4125 | bfd_vma insn = bfd_get_32 (input_bfd, hit_data); |
| 4126 | |
| 4127 | if (globals->use_rel) |
| 4128 | { |
| 4129 | addend = ((insn >> 4) & 0xf000) | (insn & 0xfff); |
| 4130 | signed_addend = (addend ^ 0x10000) - 0x10000; |
| 4131 | } |
| 4132 | value += signed_addend; |
| 4133 | if (sym_flags == STT_ARM_TFUNC) |
| 4134 | value |= 1; |
| 4135 | |
| 4136 | if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL) |
| 4137 | value -= (input_section->output_section->vma |
| 4138 | + input_section->output_offset + rel->r_offset); |
| 4139 | |
| 4140 | if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL) |
| 4141 | value >>= 16; |
| 4142 | |
| 4143 | insn &= 0xfff0f000; |
| 4144 | insn |= value & 0xfff; |
| 4145 | insn |= (value & 0xf000) << 4; |
| 4146 | bfd_put_32 (input_bfd, insn, hit_data); |
| 4147 | } |
| 4148 | return bfd_reloc_ok; |
| 4149 | |
| 4150 | case R_ARM_THM_MOVW_ABS_NC: |
| 4151 | case R_ARM_THM_MOVT_ABS: |
| 4152 | case R_ARM_THM_MOVW_PREL_NC: |
| 4153 | case R_ARM_THM_MOVT_PREL: |
| 4154 | { |
| 4155 | bfd_vma insn; |
| 4156 | |
| 4157 | insn = bfd_get_16 (input_bfd, hit_data) << 16; |
| 4158 | insn |= bfd_get_16 (input_bfd, hit_data + 2); |
| 4159 | |
| 4160 | if (globals->use_rel) |
| 4161 | { |
| 4162 | addend = ((insn >> 4) & 0xf000) |
| 4163 | | ((insn >> 15) & 0x0800) |
| 4164 | | ((insn >> 4) & 0x0700) |
| 4165 | | (insn & 0x00ff); |
| 4166 | signed_addend = (addend ^ 0x10000) - 0x10000; |
| 4167 | } |
| 4168 | value += signed_addend; |
| 4169 | if (sym_flags == STT_ARM_TFUNC) |
| 4170 | value |= 1; |
| 4171 | |
| 4172 | if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL) |
| 4173 | value -= (input_section->output_section->vma |
| 4174 | + input_section->output_offset + rel->r_offset); |
| 4175 | |
| 4176 | if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL) |
| 4177 | value >>= 16; |
| 4178 | |
| 4179 | insn &= 0xfbf08f00; |
| 4180 | insn |= (value & 0xf000) << 4; |
| 4181 | insn |= (value & 0x0800) << 15; |
| 4182 | insn |= (value & 0x0700) << 4; |
| 4183 | insn |= (value & 0x00ff); |
| 4184 | |
| 4185 | bfd_put_16 (input_bfd, insn >> 16, hit_data); |
| 4186 | bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2); |
| 4187 | } |
| 4188 | return bfd_reloc_ok; |
| 4189 | |
| 4190 | default: |
| 4191 | return bfd_reloc_notsupported; |
| 4192 | } |
| 4193 | } |
| 4194 | |
| 4195 | |
| 4196 | static int |
| 4197 | uleb128_size (unsigned int i) |
| 4198 | { |
| 4199 | int size; |
| 4200 | size = 1; |
| 4201 | while (i >= 0x80) |
| 4202 | { |
| 4203 | i >>= 7; |
| 4204 | size++; |
| 4205 | } |
| 4206 | return size; |
| 4207 | } |
| 4208 | |
| 4209 | /* Return TRUE if the attribute has the default value (0/""). */ |
| 4210 | static bfd_boolean |
| 4211 | is_default_attr (aeabi_attribute *attr) |
| 4212 | { |
| 4213 | if ((attr->type & 1) && attr->i != 0) |
| 4214 | return FALSE; |
| 4215 | if ((attr->type & 2) && attr->s && *attr->s) |
| 4216 | return FALSE; |
| 4217 | |
| 4218 | return TRUE; |
| 4219 | } |
| 4220 | |
| 4221 | /* Return the size of a single attribute. */ |
| 4222 | static bfd_vma |
| 4223 | eabi_attr_size(int tag, aeabi_attribute *attr) |
| 4224 | { |
| 4225 | bfd_vma size; |
| 4226 | |
| 4227 | if (is_default_attr (attr)) |
| 4228 | return 0; |
| 4229 | |
| 4230 | size = uleb128_size (tag); |
| 4231 | if (attr->type & 1) |
| 4232 | size += uleb128_size (attr->i); |
| 4233 | if (attr->type & 2) |
| 4234 | size += strlen ((char *)attr->s) + 1; |
| 4235 | return size; |
| 4236 | } |
| 4237 | |
| 4238 | /* Returns the size of the eabi object attributess section. */ |
| 4239 | bfd_vma |
| 4240 | elf32_arm_eabi_attr_size (bfd *abfd) |
| 4241 | { |
| 4242 | bfd_vma size; |
| 4243 | aeabi_attribute *attr; |
| 4244 | aeabi_attribute_list *list; |
| 4245 | int i; |
| 4246 | |
| 4247 | attr = elf32_arm_tdata (abfd)->known_eabi_attributes; |
| 4248 | size = 16; /* 'A' <size> "aeabi" 0x1 <size>. */ |
| 4249 | for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++) |
| 4250 | size += eabi_attr_size (i, &attr[i]); |
| 4251 | |
| 4252 | for (list = elf32_arm_tdata (abfd)->other_eabi_attributes; |
| 4253 | list; |
| 4254 | list = list->next) |
| 4255 | size += eabi_attr_size (list->tag, &list->attr); |
| 4256 | |
| 4257 | return size; |
| 4258 | } |
| 4259 | |
| 4260 | static bfd_byte * |
| 4261 | write_uleb128 (bfd_byte *p, unsigned int val) |
| 4262 | { |
| 4263 | bfd_byte c; |
| 4264 | do |
| 4265 | { |
| 4266 | c = val & 0x7f; |
| 4267 | val >>= 7; |
| 4268 | if (val) |
| 4269 | c |= 0x80; |
| 4270 | *(p++) = c; |
| 4271 | } |
| 4272 | while (val); |
| 4273 | return p; |
| 4274 | } |
| 4275 | |
| 4276 | /* Write attribute ATTR to butter P, and return a pointer to the following |
| 4277 | byte. */ |
| 4278 | static bfd_byte * |
| 4279 | write_eabi_attribute (bfd_byte *p, int tag, aeabi_attribute *attr) |
| 4280 | { |
| 4281 | /* Suppress default entries. */ |
| 4282 | if (is_default_attr(attr)) |
| 4283 | return p; |
| 4284 | |
| 4285 | p = write_uleb128 (p, tag); |
| 4286 | if (attr->type & 1) |
| 4287 | p = write_uleb128 (p, attr->i); |
| 4288 | if (attr->type & 2) |
| 4289 | { |
| 4290 | int len; |
| 4291 | |
| 4292 | len = strlen (attr->s) + 1; |
| 4293 | memcpy (p, attr->s, len); |
| 4294 | p += len; |
| 4295 | } |
| 4296 | |
| 4297 | return p; |
| 4298 | } |
| 4299 | |
| 4300 | /* Write the contents of the eabi attributes section to p. */ |
| 4301 | void |
| 4302 | elf32_arm_set_eabi_attr_contents (bfd *abfd, bfd_byte *contents, bfd_vma size) |
| 4303 | { |
| 4304 | bfd_byte *p; |
| 4305 | aeabi_attribute *attr; |
| 4306 | aeabi_attribute_list *list; |
| 4307 | int i; |
| 4308 | |
| 4309 | p = contents; |
| 4310 | *(p++) = 'A'; |
| 4311 | bfd_put_32 (abfd, size - 1, p); |
| 4312 | p += 4; |
| 4313 | memcpy (p, "aeabi", 6); |
| 4314 | p += 6; |
| 4315 | *(p++) = Tag_File; |
| 4316 | bfd_put_32 (abfd, size - 11, p); |
| 4317 | p += 4; |
| 4318 | |
| 4319 | attr = elf32_arm_tdata (abfd)->known_eabi_attributes; |
| 4320 | for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++) |
| 4321 | p = write_eabi_attribute (p, i, &attr[i]); |
| 4322 | |
| 4323 | for (list = elf32_arm_tdata (abfd)->other_eabi_attributes; |
| 4324 | list; |
| 4325 | list = list->next) |
| 4326 | p = write_eabi_attribute (p, list->tag, &list->attr); |
| 4327 | } |
| 4328 | |
| 4329 | /* Override final_link to handle EABI object attribute sections. */ |
| 4330 | |
| 4331 | static bfd_boolean |
| 4332 | elf32_arm_bfd_final_link (bfd *abfd, struct bfd_link_info *info) |
| 4333 | { |
| 4334 | asection *o; |
| 4335 | struct bfd_link_order *p; |
| 4336 | asection *attr_section = NULL; |
| 4337 | bfd_byte *contents; |
| 4338 | bfd_vma size = 0; |
| 4339 | |
| 4340 | /* elf32_arm_merge_private_bfd_data will already have merged the |
| 4341 | object attributes. Remove the input sections from the link, and set |
| 4342 | the contents of the output secton. */ |
| 4343 | for (o = abfd->sections; o != NULL; o = o->next) |
| 4344 | { |
| 4345 | if (strcmp (o->name, ".ARM.attributes") == 0) |
| 4346 | { |
| 4347 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
| 4348 | { |
| 4349 | asection *input_section; |
| 4350 | |
| 4351 | if (p->type != bfd_indirect_link_order) |
| 4352 | continue; |
| 4353 | input_section = p->u.indirect.section; |
| 4354 | /* Hack: reset the SEC_HAS_CONTENTS flag so that |
| 4355 | elf_link_input_bfd ignores this section. */ |
| 4356 | input_section->flags &= ~SEC_HAS_CONTENTS; |
| 4357 | } |
| 4358 | |
| 4359 | size = elf32_arm_eabi_attr_size (abfd); |
| 4360 | bfd_set_section_size (abfd, o, size); |
| 4361 | attr_section = o; |
| 4362 | /* Skip this section later on. */ |
| 4363 | o->map_head.link_order = NULL; |
| 4364 | } |
| 4365 | } |
| 4366 | /* Invoke the ELF linker to do all the work. */ |
| 4367 | if (!bfd_elf_final_link (abfd, info)) |
| 4368 | return FALSE; |
| 4369 | |
| 4370 | if (attr_section) |
| 4371 | { |
| 4372 | contents = bfd_malloc(size); |
| 4373 | if (contents == NULL) |
| 4374 | return FALSE; |
| 4375 | elf32_arm_set_eabi_attr_contents (abfd, contents, size); |
| 4376 | bfd_set_section_contents (abfd, attr_section, contents, 0, size); |
| 4377 | free (contents); |
| 4378 | } |
| 4379 | return TRUE; |
| 4380 | } |
| 4381 | |
| 4382 | |
| 4383 | /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */ |
| 4384 | static void |
| 4385 | arm_add_to_rel (bfd * abfd, |
| 4386 | bfd_byte * address, |
| 4387 | reloc_howto_type * howto, |
| 4388 | bfd_signed_vma increment) |
| 4389 | { |
| 4390 | bfd_signed_vma addend; |
| 4391 | |
| 4392 | if (howto->type == R_ARM_THM_CALL) |
| 4393 | { |
| 4394 | int upper_insn, lower_insn; |
| 4395 | int upper, lower; |
| 4396 | |
| 4397 | upper_insn = bfd_get_16 (abfd, address); |
| 4398 | lower_insn = bfd_get_16 (abfd, address + 2); |
| 4399 | upper = upper_insn & 0x7ff; |
| 4400 | lower = lower_insn & 0x7ff; |
| 4401 | |
| 4402 | addend = (upper << 12) | (lower << 1); |
| 4403 | addend += increment; |
| 4404 | addend >>= 1; |
| 4405 | |
| 4406 | upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff); |
| 4407 | lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff); |
| 4408 | |
| 4409 | bfd_put_16 (abfd, (bfd_vma) upper_insn, address); |
| 4410 | bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2); |
| 4411 | } |
| 4412 | else |
| 4413 | { |
| 4414 | bfd_vma contents; |
| 4415 | |
| 4416 | contents = bfd_get_32 (abfd, address); |
| 4417 | |
| 4418 | /* Get the (signed) value from the instruction. */ |
| 4419 | addend = contents & howto->src_mask; |
| 4420 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 4421 | { |
| 4422 | bfd_signed_vma mask; |
| 4423 | |
| 4424 | mask = -1; |
| 4425 | mask &= ~ howto->src_mask; |
| 4426 | addend |= mask; |
| 4427 | } |
| 4428 | |
| 4429 | /* Add in the increment, (which is a byte value). */ |
| 4430 | switch (howto->type) |
| 4431 | { |
| 4432 | default: |
| 4433 | addend += increment; |
| 4434 | break; |
| 4435 | |
| 4436 | case R_ARM_PC24: |
| 4437 | case R_ARM_PLT32: |
| 4438 | case R_ARM_CALL: |
| 4439 | case R_ARM_JUMP24: |
| 4440 | addend <<= howto->size; |
| 4441 | addend += increment; |
| 4442 | |
| 4443 | /* Should we check for overflow here ? */ |
| 4444 | |
| 4445 | /* Drop any undesired bits. */ |
| 4446 | addend >>= howto->rightshift; |
| 4447 | break; |
| 4448 | } |
| 4449 | |
| 4450 | contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask); |
| 4451 | |
| 4452 | bfd_put_32 (abfd, contents, address); |
| 4453 | } |
| 4454 | } |
| 4455 | |
| 4456 | #define IS_ARM_TLS_RELOC(R_TYPE) \ |
| 4457 | ((R_TYPE) == R_ARM_TLS_GD32 \ |
| 4458 | || (R_TYPE) == R_ARM_TLS_LDO32 \ |
| 4459 | || (R_TYPE) == R_ARM_TLS_LDM32 \ |
| 4460 | || (R_TYPE) == R_ARM_TLS_DTPOFF32 \ |
| 4461 | || (R_TYPE) == R_ARM_TLS_DTPMOD32 \ |
| 4462 | || (R_TYPE) == R_ARM_TLS_TPOFF32 \ |
| 4463 | || (R_TYPE) == R_ARM_TLS_LE32 \ |
| 4464 | || (R_TYPE) == R_ARM_TLS_IE32) |
| 4465 | |
| 4466 | /* Relocate an ARM ELF section. */ |
| 4467 | static bfd_boolean |
| 4468 | elf32_arm_relocate_section (bfd * output_bfd, |
| 4469 | struct bfd_link_info * info, |
| 4470 | bfd * input_bfd, |
| 4471 | asection * input_section, |
| 4472 | bfd_byte * contents, |
| 4473 | Elf_Internal_Rela * relocs, |
| 4474 | Elf_Internal_Sym * local_syms, |
| 4475 | asection ** local_sections) |
| 4476 | { |
| 4477 | Elf_Internal_Shdr *symtab_hdr; |
| 4478 | struct elf_link_hash_entry **sym_hashes; |
| 4479 | Elf_Internal_Rela *rel; |
| 4480 | Elf_Internal_Rela *relend; |
| 4481 | const char *name; |
| 4482 | struct elf32_arm_link_hash_table * globals; |
| 4483 | |
| 4484 | globals = elf32_arm_hash_table (info); |
| 4485 | if (info->relocatable && !globals->use_rel) |
| 4486 | return TRUE; |
| 4487 | |
| 4488 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 4489 | sym_hashes = elf_sym_hashes (input_bfd); |
| 4490 | |
| 4491 | rel = relocs; |
| 4492 | relend = relocs + input_section->reloc_count; |
| 4493 | for (; rel < relend; rel++) |
| 4494 | { |
| 4495 | int r_type; |
| 4496 | reloc_howto_type * howto; |
| 4497 | unsigned long r_symndx; |
| 4498 | Elf_Internal_Sym * sym; |
| 4499 | asection * sec; |
| 4500 | struct elf_link_hash_entry * h; |
| 4501 | bfd_vma relocation; |
| 4502 | bfd_reloc_status_type r; |
| 4503 | arelent bfd_reloc; |
| 4504 | char sym_type; |
| 4505 | bfd_boolean unresolved_reloc = FALSE; |
| 4506 | |
| 4507 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 4508 | r_type = ELF32_R_TYPE (rel->r_info); |
| 4509 | r_type = arm_real_reloc_type (globals, r_type); |
| 4510 | |
| 4511 | if ( r_type == R_ARM_GNU_VTENTRY |
| 4512 | || r_type == R_ARM_GNU_VTINHERIT) |
| 4513 | continue; |
| 4514 | |
| 4515 | bfd_reloc.howto = elf32_arm_howto_from_type (r_type); |
| 4516 | howto = bfd_reloc.howto; |
| 4517 | |
| 4518 | if (info->relocatable && globals->use_rel) |
| 4519 | { |
| 4520 | /* This is a relocatable link. We don't have to change |
| 4521 | anything, unless the reloc is against a section symbol, |
| 4522 | in which case we have to adjust according to where the |
| 4523 | section symbol winds up in the output section. */ |
| 4524 | if (r_symndx < symtab_hdr->sh_info) |
| 4525 | { |
| 4526 | sym = local_syms + r_symndx; |
| 4527 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 4528 | { |
| 4529 | sec = local_sections[r_symndx]; |
| 4530 | arm_add_to_rel (input_bfd, contents + rel->r_offset, |
| 4531 | howto, |
| 4532 | (bfd_signed_vma) (sec->output_offset |
| 4533 | + sym->st_value)); |
| 4534 | } |
| 4535 | } |
| 4536 | |
| 4537 | continue; |
| 4538 | } |
| 4539 | |
| 4540 | /* This is a final link. */ |
| 4541 | h = NULL; |
| 4542 | sym = NULL; |
| 4543 | sec = NULL; |
| 4544 | |
| 4545 | if (r_symndx < symtab_hdr->sh_info) |
| 4546 | { |
| 4547 | sym = local_syms + r_symndx; |
| 4548 | sym_type = ELF32_ST_TYPE (sym->st_info); |
| 4549 | sec = local_sections[r_symndx]; |
| 4550 | if (globals->use_rel) |
| 4551 | { |
| 4552 | relocation = (sec->output_section->vma |
| 4553 | + sec->output_offset |
| 4554 | + sym->st_value); |
| 4555 | if ((sec->flags & SEC_MERGE) |
| 4556 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 4557 | { |
| 4558 | asection *msec; |
| 4559 | bfd_vma addend, value; |
| 4560 | |
| 4561 | if (howto->rightshift) |
| 4562 | { |
| 4563 | (*_bfd_error_handler) |
| 4564 | (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"), |
| 4565 | input_bfd, input_section, |
| 4566 | (long) rel->r_offset, howto->name); |
| 4567 | return FALSE; |
| 4568 | } |
| 4569 | |
| 4570 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 4571 | |
| 4572 | /* Get the (signed) value from the instruction. */ |
| 4573 | addend = value & howto->src_mask; |
| 4574 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 4575 | { |
| 4576 | bfd_signed_vma mask; |
| 4577 | |
| 4578 | mask = -1; |
| 4579 | mask &= ~ howto->src_mask; |
| 4580 | addend |= mask; |
| 4581 | } |
| 4582 | msec = sec; |
| 4583 | addend = |
| 4584 | _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) |
| 4585 | - relocation; |
| 4586 | addend += msec->output_section->vma + msec->output_offset; |
| 4587 | value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask); |
| 4588 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| 4589 | } |
| 4590 | } |
| 4591 | else |
| 4592 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 4593 | } |
| 4594 | else |
| 4595 | { |
| 4596 | bfd_boolean warned; |
| 4597 | |
| 4598 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 4599 | r_symndx, symtab_hdr, sym_hashes, |
| 4600 | h, sec, relocation, |
| 4601 | unresolved_reloc, warned); |
| 4602 | |
| 4603 | sym_type = h->type; |
| 4604 | } |
| 4605 | |
| 4606 | if (h != NULL) |
| 4607 | name = h->root.root.string; |
| 4608 | else |
| 4609 | { |
| 4610 | name = (bfd_elf_string_from_elf_section |
| 4611 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 4612 | if (name == NULL || *name == '\0') |
| 4613 | name = bfd_section_name (input_bfd, sec); |
| 4614 | } |
| 4615 | |
| 4616 | if (r_symndx != 0 |
| 4617 | && r_type != R_ARM_NONE |
| 4618 | && (h == NULL |
| 4619 | || h->root.type == bfd_link_hash_defined |
| 4620 | || h->root.type == bfd_link_hash_defweak) |
| 4621 | && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS)) |
| 4622 | { |
| 4623 | (*_bfd_error_handler) |
| 4624 | ((sym_type == STT_TLS |
| 4625 | ? _("%B(%A+0x%lx): %s used with TLS symbol %s") |
| 4626 | : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), |
| 4627 | input_bfd, |
| 4628 | input_section, |
| 4629 | (long) rel->r_offset, |
| 4630 | howto->name, |
| 4631 | name); |
| 4632 | } |
| 4633 | |
| 4634 | r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, |
| 4635 | input_section, contents, rel, |
| 4636 | relocation, info, sec, name, |
| 4637 | (h ? ELF_ST_TYPE (h->type) : |
| 4638 | ELF_ST_TYPE (sym->st_info)), h, |
| 4639 | &unresolved_reloc); |
| 4640 | |
| 4641 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 4642 | because such sections are not SEC_ALLOC and thus ld.so will |
| 4643 | not process them. */ |
| 4644 | if (unresolved_reloc |
| 4645 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 4646 | && h->def_dynamic)) |
| 4647 | { |
| 4648 | (*_bfd_error_handler) |
| 4649 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| 4650 | input_bfd, |
| 4651 | input_section, |
| 4652 | (long) rel->r_offset, |
| 4653 | howto->name, |
| 4654 | h->root.root.string); |
| 4655 | return FALSE; |
| 4656 | } |
| 4657 | |
| 4658 | if (r != bfd_reloc_ok) |
| 4659 | { |
| 4660 | const char * msg = (const char *) 0; |
| 4661 | |
| 4662 | switch (r) |
| 4663 | { |
| 4664 | case bfd_reloc_overflow: |
| 4665 | /* If the overflowing reloc was to an undefined symbol, |
| 4666 | we have already printed one error message and there |
| 4667 | is no point complaining again. */ |
| 4668 | if ((! h || |
| 4669 | h->root.type != bfd_link_hash_undefined) |
| 4670 | && (!((*info->callbacks->reloc_overflow) |
| 4671 | (info, (h ? &h->root : NULL), name, howto->name, |
| 4672 | (bfd_vma) 0, input_bfd, input_section, |
| 4673 | rel->r_offset)))) |
| 4674 | return FALSE; |
| 4675 | break; |
| 4676 | |
| 4677 | case bfd_reloc_undefined: |
| 4678 | if (!((*info->callbacks->undefined_symbol) |
| 4679 | (info, name, input_bfd, input_section, |
| 4680 | rel->r_offset, TRUE))) |
| 4681 | return FALSE; |
| 4682 | break; |
| 4683 | |
| 4684 | case bfd_reloc_outofrange: |
| 4685 | msg = _("internal error: out of range error"); |
| 4686 | goto common_error; |
| 4687 | |
| 4688 | case bfd_reloc_notsupported: |
| 4689 | msg = _("internal error: unsupported relocation error"); |
| 4690 | goto common_error; |
| 4691 | |
| 4692 | case bfd_reloc_dangerous: |
| 4693 | msg = _("internal error: dangerous error"); |
| 4694 | goto common_error; |
| 4695 | |
| 4696 | default: |
| 4697 | msg = _("internal error: unknown error"); |
| 4698 | /* fall through */ |
| 4699 | |
| 4700 | common_error: |
| 4701 | if (!((*info->callbacks->warning) |
| 4702 | (info, msg, name, input_bfd, input_section, |
| 4703 | rel->r_offset))) |
| 4704 | return FALSE; |
| 4705 | break; |
| 4706 | } |
| 4707 | } |
| 4708 | } |
| 4709 | |
| 4710 | return TRUE; |
| 4711 | } |
| 4712 | |
| 4713 | /* Allocate/find an object attribute. */ |
| 4714 | static aeabi_attribute * |
| 4715 | elf32_arm_new_eabi_attr (bfd *abfd, int tag) |
| 4716 | { |
| 4717 | aeabi_attribute *attr; |
| 4718 | aeabi_attribute_list *list; |
| 4719 | aeabi_attribute_list *p; |
| 4720 | aeabi_attribute_list **lastp; |
| 4721 | |
| 4722 | |
| 4723 | if (tag < NUM_KNOWN_ATTRIBUTES) |
| 4724 | { |
| 4725 | /* Knwon tags are preallocated. */ |
| 4726 | attr = &elf32_arm_tdata (abfd)->known_eabi_attributes[tag]; |
| 4727 | } |
| 4728 | else |
| 4729 | { |
| 4730 | /* Create a new tag. */ |
| 4731 | list = (aeabi_attribute_list *) |
| 4732 | bfd_alloc (abfd, sizeof (aeabi_attribute_list)); |
| 4733 | memset (list, 0, sizeof (aeabi_attribute_list)); |
| 4734 | list->tag = tag; |
| 4735 | /* Keep the tag list in order. */ |
| 4736 | lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes; |
| 4737 | for (p = *lastp; p; p = p->next) |
| 4738 | { |
| 4739 | if (tag < p->tag) |
| 4740 | break; |
| 4741 | lastp = &p->next; |
| 4742 | } |
| 4743 | list->next = *lastp; |
| 4744 | *lastp = list; |
| 4745 | attr = &list->attr; |
| 4746 | } |
| 4747 | |
| 4748 | return attr; |
| 4749 | } |
| 4750 | |
| 4751 | int |
| 4752 | elf32_arm_get_eabi_attr_int (bfd *abfd, int tag) |
| 4753 | { |
| 4754 | aeabi_attribute_list *p; |
| 4755 | |
| 4756 | if (tag < NUM_KNOWN_ATTRIBUTES) |
| 4757 | { |
| 4758 | /* Knwon tags are preallocated. */ |
| 4759 | return elf32_arm_tdata (abfd)->known_eabi_attributes[tag].i; |
| 4760 | } |
| 4761 | else |
| 4762 | { |
| 4763 | for (p = elf32_arm_tdata (abfd)->other_eabi_attributes; |
| 4764 | p; |
| 4765 | p = p->next) |
| 4766 | { |
| 4767 | if (tag == p->tag) |
| 4768 | return p->attr.i; |
| 4769 | if (tag < p->tag) |
| 4770 | break; |
| 4771 | } |
| 4772 | return 0; |
| 4773 | } |
| 4774 | } |
| 4775 | |
| 4776 | void |
| 4777 | elf32_arm_add_eabi_attr_int (bfd *abfd, int tag, unsigned int i) |
| 4778 | { |
| 4779 | aeabi_attribute *attr; |
| 4780 | |
| 4781 | attr = elf32_arm_new_eabi_attr (abfd, tag); |
| 4782 | attr->type = 1; |
| 4783 | attr->i = i; |
| 4784 | } |
| 4785 | |
| 4786 | static char * |
| 4787 | attr_strdup (bfd *abfd, const char * s) |
| 4788 | { |
| 4789 | char * p; |
| 4790 | int len; |
| 4791 | |
| 4792 | len = strlen (s) + 1; |
| 4793 | p = (char *)bfd_alloc(abfd, len); |
| 4794 | return memcpy (p, s, len); |
| 4795 | } |
| 4796 | |
| 4797 | void |
| 4798 | elf32_arm_add_eabi_attr_string (bfd *abfd, int tag, const char *s) |
| 4799 | { |
| 4800 | aeabi_attribute *attr; |
| 4801 | |
| 4802 | attr = elf32_arm_new_eabi_attr (abfd, tag); |
| 4803 | attr->type = 2; |
| 4804 | attr->s = attr_strdup (abfd, s); |
| 4805 | } |
| 4806 | |
| 4807 | void |
| 4808 | elf32_arm_add_eabi_attr_compat (bfd *abfd, unsigned int i, const char *s) |
| 4809 | { |
| 4810 | aeabi_attribute_list *list; |
| 4811 | aeabi_attribute_list *p; |
| 4812 | aeabi_attribute_list **lastp; |
| 4813 | |
| 4814 | list = (aeabi_attribute_list *) |
| 4815 | bfd_alloc (abfd, sizeof (aeabi_attribute_list)); |
| 4816 | memset (list, 0, sizeof (aeabi_attribute_list)); |
| 4817 | list->tag = Tag_compatibility; |
| 4818 | list->attr.type = 3; |
| 4819 | list->attr.i = i; |
| 4820 | list->attr.s = attr_strdup (abfd, s); |
| 4821 | |
| 4822 | lastp = &elf32_arm_tdata (abfd)->other_eabi_attributes; |
| 4823 | for (p = *lastp; p; p = p->next) |
| 4824 | { |
| 4825 | int cmp; |
| 4826 | if (p->tag != Tag_compatibility) |
| 4827 | break; |
| 4828 | cmp = strcmp(s, p->attr.s); |
| 4829 | if (cmp < 0 || (cmp == 0 && i < p->attr.i)) |
| 4830 | break; |
| 4831 | lastp = &p->next; |
| 4832 | } |
| 4833 | list->next = *lastp; |
| 4834 | *lastp = list; |
| 4835 | } |
| 4836 | |
| 4837 | /* Set the right machine number. */ |
| 4838 | |
| 4839 | static bfd_boolean |
| 4840 | elf32_arm_object_p (bfd *abfd) |
| 4841 | { |
| 4842 | unsigned int mach; |
| 4843 | |
| 4844 | mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION); |
| 4845 | |
| 4846 | if (mach != bfd_mach_arm_unknown) |
| 4847 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); |
| 4848 | |
| 4849 | else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT) |
| 4850 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312); |
| 4851 | |
| 4852 | else |
| 4853 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); |
| 4854 | |
| 4855 | return TRUE; |
| 4856 | } |
| 4857 | |
| 4858 | /* Function to keep ARM specific flags in the ELF header. */ |
| 4859 | |
| 4860 | static bfd_boolean |
| 4861 | elf32_arm_set_private_flags (bfd *abfd, flagword flags) |
| 4862 | { |
| 4863 | if (elf_flags_init (abfd) |
| 4864 | && elf_elfheader (abfd)->e_flags != flags) |
| 4865 | { |
| 4866 | if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN) |
| 4867 | { |
| 4868 | if (flags & EF_ARM_INTERWORK) |
| 4869 | (*_bfd_error_handler) |
| 4870 | (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"), |
| 4871 | abfd); |
| 4872 | else |
| 4873 | _bfd_error_handler |
| 4874 | (_("Warning: Clearing the interworking flag of %B due to outside request"), |
| 4875 | abfd); |
| 4876 | } |
| 4877 | } |
| 4878 | else |
| 4879 | { |
| 4880 | elf_elfheader (abfd)->e_flags = flags; |
| 4881 | elf_flags_init (abfd) = TRUE; |
| 4882 | } |
| 4883 | |
| 4884 | return TRUE; |
| 4885 | } |
| 4886 | |
| 4887 | /* Copy the eabi object attribute from IBFD to OBFD. */ |
| 4888 | static void |
| 4889 | copy_eabi_attributes (bfd *ibfd, bfd *obfd) |
| 4890 | { |
| 4891 | aeabi_attribute *in_attr; |
| 4892 | aeabi_attribute *out_attr; |
| 4893 | aeabi_attribute_list *list; |
| 4894 | int i; |
| 4895 | |
| 4896 | in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes; |
| 4897 | out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes; |
| 4898 | for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++) |
| 4899 | { |
| 4900 | out_attr->i = in_attr->i; |
| 4901 | if (in_attr->s && *in_attr->s) |
| 4902 | out_attr->s = attr_strdup (obfd, in_attr->s); |
| 4903 | in_attr++; |
| 4904 | out_attr++; |
| 4905 | } |
| 4906 | |
| 4907 | for (list = elf32_arm_tdata (ibfd)->other_eabi_attributes; |
| 4908 | list; |
| 4909 | list = list->next) |
| 4910 | { |
| 4911 | in_attr = &list->attr; |
| 4912 | switch (in_attr->type) |
| 4913 | { |
| 4914 | case 1: |
| 4915 | elf32_arm_add_eabi_attr_int (obfd, list->tag, in_attr->i); |
| 4916 | break; |
| 4917 | case 2: |
| 4918 | elf32_arm_add_eabi_attr_string (obfd, list->tag, in_attr->s); |
| 4919 | break; |
| 4920 | case 3: |
| 4921 | elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s); |
| 4922 | break; |
| 4923 | default: |
| 4924 | abort(); |
| 4925 | } |
| 4926 | } |
| 4927 | } |
| 4928 | |
| 4929 | |
| 4930 | /* Copy backend specific data from one object module to another. */ |
| 4931 | |
| 4932 | static bfd_boolean |
| 4933 | elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 4934 | { |
| 4935 | flagword in_flags; |
| 4936 | flagword out_flags; |
| 4937 | |
| 4938 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 4939 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 4940 | return TRUE; |
| 4941 | |
| 4942 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 4943 | out_flags = elf_elfheader (obfd)->e_flags; |
| 4944 | |
| 4945 | if (elf_flags_init (obfd) |
| 4946 | && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN |
| 4947 | && in_flags != out_flags) |
| 4948 | { |
| 4949 | /* Cannot mix APCS26 and APCS32 code. */ |
| 4950 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
| 4951 | return FALSE; |
| 4952 | |
| 4953 | /* Cannot mix float APCS and non-float APCS code. */ |
| 4954 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
| 4955 | return FALSE; |
| 4956 | |
| 4957 | /* If the src and dest have different interworking flags |
| 4958 | then turn off the interworking bit. */ |
| 4959 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
| 4960 | { |
| 4961 | if (out_flags & EF_ARM_INTERWORK) |
| 4962 | _bfd_error_handler |
| 4963 | (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"), |
| 4964 | obfd, ibfd); |
| 4965 | |
| 4966 | in_flags &= ~EF_ARM_INTERWORK; |
| 4967 | } |
| 4968 | |
| 4969 | /* Likewise for PIC, though don't warn for this case. */ |
| 4970 | if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC)) |
| 4971 | in_flags &= ~EF_ARM_PIC; |
| 4972 | } |
| 4973 | |
| 4974 | elf_elfheader (obfd)->e_flags = in_flags; |
| 4975 | elf_flags_init (obfd) = TRUE; |
| 4976 | |
| 4977 | /* Also copy the EI_OSABI field. */ |
| 4978 | elf_elfheader (obfd)->e_ident[EI_OSABI] = |
| 4979 | elf_elfheader (ibfd)->e_ident[EI_OSABI]; |
| 4980 | |
| 4981 | /* Copy EABI object attributes. */ |
| 4982 | copy_eabi_attributes (ibfd, obfd); |
| 4983 | |
| 4984 | return TRUE; |
| 4985 | } |
| 4986 | |
| 4987 | /* Values for Tag_ABI_PCS_R9_use. */ |
| 4988 | enum |
| 4989 | { |
| 4990 | AEABI_R9_V6, |
| 4991 | AEABI_R9_SB, |
| 4992 | AEABI_R9_TLS, |
| 4993 | AEABI_R9_unused |
| 4994 | }; |
| 4995 | |
| 4996 | /* Values for Tag_ABI_PCS_RW_data. */ |
| 4997 | enum |
| 4998 | { |
| 4999 | AEABI_PCS_RW_data_absolute, |
| 5000 | AEABI_PCS_RW_data_PCrel, |
| 5001 | AEABI_PCS_RW_data_SBrel, |
| 5002 | AEABI_PCS_RW_data_unused |
| 5003 | }; |
| 5004 | |
| 5005 | /* Values for Tag_ABI_enum_size. */ |
| 5006 | enum |
| 5007 | { |
| 5008 | AEABI_enum_unused, |
| 5009 | AEABI_enum_short, |
| 5010 | AEABI_enum_wide, |
| 5011 | AEABI_enum_forced_wide |
| 5012 | }; |
| 5013 | |
| 5014 | /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there |
| 5015 | are conflicting attributes. */ |
| 5016 | static bfd_boolean |
| 5017 | elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd) |
| 5018 | { |
| 5019 | aeabi_attribute *in_attr; |
| 5020 | aeabi_attribute *out_attr; |
| 5021 | aeabi_attribute_list *in_list; |
| 5022 | aeabi_attribute_list *out_list; |
| 5023 | /* Some tags have 0 = don't care, 1 = strong requirement, |
| 5024 | 2 = weak requirement. */ |
| 5025 | static const int order_312[3] = {3, 1, 2}; |
| 5026 | int i; |
| 5027 | |
| 5028 | if (!elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i) |
| 5029 | { |
| 5030 | /* This is the first object. Copy the attributes. */ |
| 5031 | copy_eabi_attributes (ibfd, obfd); |
| 5032 | return TRUE; |
| 5033 | } |
| 5034 | |
| 5035 | /* Use the Tag_null value to indicate the attributes have been |
| 5036 | initialized. */ |
| 5037 | elf32_arm_tdata (ibfd)->known_eabi_attributes[0].i = 1; |
| 5038 | |
| 5039 | in_attr = elf32_arm_tdata (ibfd)->known_eabi_attributes; |
| 5040 | out_attr = elf32_arm_tdata (obfd)->known_eabi_attributes; |
| 5041 | /* This needs to happen before Tag_ABI_FP_number_model is merged. */ |
| 5042 | if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i) |
| 5043 | { |
| 5044 | /* Ignore mismatches if teh object doesn't use floating point. */ |
| 5045 | if (out_attr[Tag_ABI_FP_number_model].i == 0) |
| 5046 | out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i; |
| 5047 | else if (in_attr[Tag_ABI_FP_number_model].i != 0) |
| 5048 | { |
| 5049 | _bfd_error_handler |
| 5050 | (_("ERROR: %B uses VFP register arguments, %B does not"), |
| 5051 | ibfd, obfd); |
| 5052 | return FALSE; |
| 5053 | } |
| 5054 | } |
| 5055 | |
| 5056 | for (i = 4; i < NUM_KNOWN_ATTRIBUTES; i++) |
| 5057 | { |
| 5058 | /* Merge this attribute with existing attributes. */ |
| 5059 | switch (i) |
| 5060 | { |
| 5061 | case Tag_CPU_raw_name: |
| 5062 | case Tag_CPU_name: |
| 5063 | /* Use whichever has the greatest architecture requirements. */ |
| 5064 | if (in_attr[Tag_CPU_arch].i > out_attr[Tag_CPU_arch].i) |
| 5065 | out_attr[i].s = attr_strdup(obfd, in_attr[i].s); |
| 5066 | break; |
| 5067 | |
| 5068 | case Tag_ABI_optimization_goals: |
| 5069 | case Tag_ABI_FP_optimization_goals: |
| 5070 | /* Use the first value seen. */ |
| 5071 | break; |
| 5072 | |
| 5073 | case Tag_CPU_arch: |
| 5074 | case Tag_ARM_ISA_use: |
| 5075 | case Tag_THUMB_ISA_use: |
| 5076 | case Tag_VFP_arch: |
| 5077 | case Tag_WMMX_arch: |
| 5078 | case Tag_NEON_arch: |
| 5079 | /* ??? Do NEON and WMMX conflict? */ |
| 5080 | case Tag_ABI_FP_rounding: |
| 5081 | case Tag_ABI_FP_denormal: |
| 5082 | case Tag_ABI_FP_exceptions: |
| 5083 | case Tag_ABI_FP_user_exceptions: |
| 5084 | case Tag_ABI_FP_number_model: |
| 5085 | case Tag_ABI_align8_preserved: |
| 5086 | case Tag_ABI_HardFP_use: |
| 5087 | /* Use the largest value specified. */ |
| 5088 | if (in_attr[i].i > out_attr[i].i) |
| 5089 | out_attr[i].i = in_attr[i].i; |
| 5090 | break; |
| 5091 | |
| 5092 | case Tag_CPU_arch_profile: |
| 5093 | /* Warn if conflicting architecture profiles used. */ |
| 5094 | if (out_attr[i].i && in_attr[i].i && in_attr[i].i != out_attr[i].i) |
| 5095 | { |
| 5096 | _bfd_error_handler |
| 5097 | (_("ERROR: %B: Conflicting architecture profiles %c/%c"), |
| 5098 | ibfd, in_attr[i].i, out_attr[i].i); |
| 5099 | return FALSE; |
| 5100 | } |
| 5101 | if (in_attr[i].i) |
| 5102 | out_attr[i].i = in_attr[i].i; |
| 5103 | break; |
| 5104 | case Tag_PCS_config: |
| 5105 | if (out_attr[i].i == 0) |
| 5106 | out_attr[i].i = in_attr[i].i; |
| 5107 | else if (in_attr[i].i != 0 && out_attr[i].i != 0) |
| 5108 | { |
| 5109 | /* It's sometimes ok to mix different configs, so this is only |
| 5110 | a warning. */ |
| 5111 | _bfd_error_handler |
| 5112 | (_("Warning: %B: Conflicting platform configuration"), ibfd); |
| 5113 | } |
| 5114 | break; |
| 5115 | case Tag_ABI_PCS_R9_use: |
| 5116 | if (out_attr[i].i != AEABI_R9_unused |
| 5117 | && in_attr[i].i != AEABI_R9_unused) |
| 5118 | { |
| 5119 | _bfd_error_handler |
| 5120 | (_("ERROR: %B: Conflicting use of R9"), ibfd); |
| 5121 | return FALSE; |
| 5122 | } |
| 5123 | if (out_attr[i].i == AEABI_R9_unused) |
| 5124 | out_attr[i].i = in_attr[i].i; |
| 5125 | break; |
| 5126 | case Tag_ABI_PCS_RW_data: |
| 5127 | if (in_attr[i].i == AEABI_PCS_RW_data_SBrel |
| 5128 | && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB |
| 5129 | && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused) |
| 5130 | { |
| 5131 | _bfd_error_handler |
| 5132 | (_("ERROR: %B: SB relative addressing conflicts with use of R9"), |
| 5133 | ibfd); |
| 5134 | return FALSE; |
| 5135 | } |
| 5136 | /* Use the smallest value specified. */ |
| 5137 | if (in_attr[i].i < out_attr[i].i) |
| 5138 | out_attr[i].i = in_attr[i].i; |
| 5139 | break; |
| 5140 | case Tag_ABI_PCS_RO_data: |
| 5141 | /* Use the smallest value specified. */ |
| 5142 | if (in_attr[i].i < out_attr[i].i) |
| 5143 | out_attr[i].i = in_attr[i].i; |
| 5144 | break; |
| 5145 | case Tag_ABI_PCS_GOT_use: |
| 5146 | if (in_attr[i].i > 2 || out_attr[i].i > 2 |
| 5147 | || order_312[in_attr[i].i] < order_312[out_attr[i].i]) |
| 5148 | out_attr[i].i = in_attr[i].i; |
| 5149 | break; |
| 5150 | case Tag_ABI_PCS_wchar_t: |
| 5151 | if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i) |
| 5152 | { |
| 5153 | _bfd_error_handler |
| 5154 | (_("ERROR: %B: Conflicting definitions of wchar_t"), ibfd); |
| 5155 | return FALSE; |
| 5156 | } |
| 5157 | if (in_attr[i].i) |
| 5158 | out_attr[i].i = in_attr[i].i; |
| 5159 | break; |
| 5160 | case Tag_ABI_align8_needed: |
| 5161 | /* ??? Check against Tag_ABI_align8_preserved. */ |
| 5162 | if (in_attr[i].i > 2 || out_attr[i].i > 2 |
| 5163 | || order_312[in_attr[i].i] < order_312[out_attr[i].i]) |
| 5164 | out_attr[i].i = in_attr[i].i; |
| 5165 | break; |
| 5166 | case Tag_ABI_enum_size: |
| 5167 | if (in_attr[i].i != AEABI_enum_unused) |
| 5168 | { |
| 5169 | if (out_attr[i].i == AEABI_enum_unused |
| 5170 | || out_attr[i].i == AEABI_enum_forced_wide) |
| 5171 | { |
| 5172 | /* The existing object is compatible with anything. |
| 5173 | Use whatever requirements the new object has. */ |
| 5174 | out_attr[i].i = in_attr[i].i; |
| 5175 | } |
| 5176 | else if (in_attr[i].i != AEABI_enum_forced_wide |
| 5177 | && out_attr[i].i != in_attr[i].i) |
| 5178 | { |
| 5179 | _bfd_error_handler |
| 5180 | (_("ERROR: %B: Conflicting enum sizes"), ibfd); |
| 5181 | } |
| 5182 | } |
| 5183 | break; |
| 5184 | case Tag_ABI_VFP_args: |
| 5185 | /* Aready done. */ |
| 5186 | break; |
| 5187 | case Tag_ABI_WMMX_args: |
| 5188 | if (in_attr[i].i != out_attr[i].i) |
| 5189 | { |
| 5190 | _bfd_error_handler |
| 5191 | (_("ERROR: %B uses iWMMXt register arguments, %B does not"), |
| 5192 | ibfd, obfd); |
| 5193 | return FALSE; |
| 5194 | } |
| 5195 | break; |
| 5196 | default: /* All known attributes should be explicitly covered. */ |
| 5197 | abort (); |
| 5198 | } |
| 5199 | } |
| 5200 | |
| 5201 | in_list = elf32_arm_tdata (ibfd)->other_eabi_attributes; |
| 5202 | out_list = elf32_arm_tdata (ibfd)->other_eabi_attributes; |
| 5203 | while (in_list && in_list->tag == Tag_compatibility) |
| 5204 | { |
| 5205 | in_attr = &in_list->attr; |
| 5206 | if (in_attr->i == 0) |
| 5207 | continue; |
| 5208 | if (in_attr->i == 1) |
| 5209 | { |
| 5210 | _bfd_error_handler |
| 5211 | (_("ERROR: %B: Must be processed by '%s' toolchain"), |
| 5212 | ibfd, in_attr->s); |
| 5213 | return FALSE; |
| 5214 | } |
| 5215 | if (!out_list || out_list->tag != Tag_compatibility |
| 5216 | || strcmp (in_attr->s, out_list->attr.s) != 0) |
| 5217 | { |
| 5218 | /* Add this compatibility tag to the output. */ |
| 5219 | elf32_arm_add_eabi_attr_compat (obfd, in_attr->i, in_attr->s); |
| 5220 | continue; |
| 5221 | } |
| 5222 | out_attr = &out_list->attr; |
| 5223 | /* Check all the input tags with the same identifier. */ |
| 5224 | for (;;) |
| 5225 | { |
| 5226 | if (out_list->tag != Tag_compatibility |
| 5227 | || in_attr->i != out_attr->i |
| 5228 | || strcmp (in_attr->s, out_attr->s) != 0) |
| 5229 | { |
| 5230 | _bfd_error_handler |
| 5231 | (_("ERROR: %B: Incompatible object tag '%s':%d"), |
| 5232 | ibfd, in_attr->s, in_attr->i); |
| 5233 | return FALSE; |
| 5234 | } |
| 5235 | in_list = in_list->next; |
| 5236 | if (in_list->tag != Tag_compatibility |
| 5237 | || strcmp (in_attr->s, in_list->attr.s) != 0) |
| 5238 | break; |
| 5239 | in_attr = &in_list->attr; |
| 5240 | out_list = out_list->next; |
| 5241 | if (out_list) |
| 5242 | out_attr = &out_list->attr; |
| 5243 | } |
| 5244 | |
| 5245 | /* Check the output doesn't have extra tags with this identifier. */ |
| 5246 | if (out_list && out_list->tag == Tag_compatibility |
| 5247 | && strcmp (in_attr->s, out_list->attr.s) == 0) |
| 5248 | { |
| 5249 | _bfd_error_handler |
| 5250 | (_("ERROR: %B: Incompatible object tag '%s':%d"), |
| 5251 | ibfd, in_attr->s, out_list->attr.i); |
| 5252 | return FALSE; |
| 5253 | } |
| 5254 | } |
| 5255 | |
| 5256 | for (; in_list; in_list = in_list->next) |
| 5257 | { |
| 5258 | if ((in_list->tag & 128) < 64) |
| 5259 | { |
| 5260 | _bfd_error_handler |
| 5261 | (_("Warning: %B: Unknown EABI object attribute %d"), |
| 5262 | ibfd, in_list->tag); |
| 5263 | break; |
| 5264 | } |
| 5265 | } |
| 5266 | return TRUE; |
| 5267 | } |
| 5268 | |
| 5269 | |
| 5270 | /* Return TRUE if the two EABI versions are incompatible. */ |
| 5271 | |
| 5272 | static bfd_boolean |
| 5273 | elf32_arm_versions_compatible (unsigned iver, unsigned over) |
| 5274 | { |
| 5275 | /* v4 and v5 are the same spec before and after it was released, |
| 5276 | so allow mixing them. */ |
| 5277 | if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5) |
| 5278 | || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4)) |
| 5279 | return TRUE; |
| 5280 | |
| 5281 | return (iver == over); |
| 5282 | } |
| 5283 | |
| 5284 | /* Merge backend specific data from an object file to the output |
| 5285 | object file when linking. */ |
| 5286 | |
| 5287 | static bfd_boolean |
| 5288 | elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd) |
| 5289 | { |
| 5290 | flagword out_flags; |
| 5291 | flagword in_flags; |
| 5292 | bfd_boolean flags_compatible = TRUE; |
| 5293 | asection *sec; |
| 5294 | |
| 5295 | /* Check if we have the same endianess. */ |
| 5296 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
| 5297 | return FALSE; |
| 5298 | |
| 5299 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 5300 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 5301 | return TRUE; |
| 5302 | |
| 5303 | if (!elf32_arm_merge_eabi_attributes (ibfd, obfd)) |
| 5304 | return FALSE; |
| 5305 | |
| 5306 | /* The input BFD must have had its flags initialised. */ |
| 5307 | /* The following seems bogus to me -- The flags are initialized in |
| 5308 | the assembler but I don't think an elf_flags_init field is |
| 5309 | written into the object. */ |
| 5310 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
| 5311 | |
| 5312 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 5313 | out_flags = elf_elfheader (obfd)->e_flags; |
| 5314 | |
| 5315 | if (!elf_flags_init (obfd)) |
| 5316 | { |
| 5317 | /* If the input is the default architecture and had the default |
| 5318 | flags then do not bother setting the flags for the output |
| 5319 | architecture, instead allow future merges to do this. If no |
| 5320 | future merges ever set these flags then they will retain their |
| 5321 | uninitialised values, which surprise surprise, correspond |
| 5322 | to the default values. */ |
| 5323 | if (bfd_get_arch_info (ibfd)->the_default |
| 5324 | && elf_elfheader (ibfd)->e_flags == 0) |
| 5325 | return TRUE; |
| 5326 | |
| 5327 | elf_flags_init (obfd) = TRUE; |
| 5328 | elf_elfheader (obfd)->e_flags = in_flags; |
| 5329 | |
| 5330 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 5331 | && bfd_get_arch_info (obfd)->the_default) |
| 5332 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); |
| 5333 | |
| 5334 | return TRUE; |
| 5335 | } |
| 5336 | |
| 5337 | /* Determine what should happen if the input ARM architecture |
| 5338 | does not match the output ARM architecture. */ |
| 5339 | if (! bfd_arm_merge_machines (ibfd, obfd)) |
| 5340 | return FALSE; |
| 5341 | |
| 5342 | /* Identical flags must be compatible. */ |
| 5343 | if (in_flags == out_flags) |
| 5344 | return TRUE; |
| 5345 | |
| 5346 | /* Check to see if the input BFD actually contains any sections. If |
| 5347 | not, its flags may not have been initialised either, but it |
| 5348 | cannot actually cause any incompatiblity. Do not short-circuit |
| 5349 | dynamic objects; their section list may be emptied by |
| 5350 | elf_link_add_object_symbols. |
| 5351 | |
| 5352 | Also check to see if there are no code sections in the input. |
| 5353 | In this case there is no need to check for code specific flags. |
| 5354 | XXX - do we need to worry about floating-point format compatability |
| 5355 | in data sections ? */ |
| 5356 | if (!(ibfd->flags & DYNAMIC)) |
| 5357 | { |
| 5358 | bfd_boolean null_input_bfd = TRUE; |
| 5359 | bfd_boolean only_data_sections = TRUE; |
| 5360 | |
| 5361 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 5362 | { |
| 5363 | /* Ignore synthetic glue sections. */ |
| 5364 | if (strcmp (sec->name, ".glue_7") |
| 5365 | && strcmp (sec->name, ".glue_7t")) |
| 5366 | { |
| 5367 | if ((bfd_get_section_flags (ibfd, sec) |
| 5368 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 5369 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 5370 | only_data_sections = FALSE; |
| 5371 | |
| 5372 | null_input_bfd = FALSE; |
| 5373 | break; |
| 5374 | } |
| 5375 | } |
| 5376 | |
| 5377 | if (null_input_bfd || only_data_sections) |
| 5378 | return TRUE; |
| 5379 | } |
| 5380 | |
| 5381 | /* Complain about various flag mismatches. */ |
| 5382 | if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags), |
| 5383 | EF_ARM_EABI_VERSION (out_flags))) |
| 5384 | { |
| 5385 | _bfd_error_handler |
| 5386 | (_("ERROR: Source object %B has EABI version %d, but target %B has EABI version %d"), |
| 5387 | ibfd, obfd, |
| 5388 | (in_flags & EF_ARM_EABIMASK) >> 24, |
| 5389 | (out_flags & EF_ARM_EABIMASK) >> 24); |
| 5390 | return FALSE; |
| 5391 | } |
| 5392 | |
| 5393 | /* Not sure what needs to be checked for EABI versions >= 1. */ |
| 5394 | /* VxWorks libraries do not use these flags. */ |
| 5395 | if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed |
| 5396 | && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed |
| 5397 | && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN) |
| 5398 | { |
| 5399 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
| 5400 | { |
| 5401 | _bfd_error_handler |
| 5402 | (_("ERROR: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"), |
| 5403 | ibfd, obfd, |
| 5404 | in_flags & EF_ARM_APCS_26 ? 26 : 32, |
| 5405 | out_flags & EF_ARM_APCS_26 ? 26 : 32); |
| 5406 | flags_compatible = FALSE; |
| 5407 | } |
| 5408 | |
| 5409 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
| 5410 | { |
| 5411 | if (in_flags & EF_ARM_APCS_FLOAT) |
| 5412 | _bfd_error_handler |
| 5413 | (_("ERROR: %B passes floats in float registers, whereas %B passes them in integer registers"), |
| 5414 | ibfd, obfd); |
| 5415 | else |
| 5416 | _bfd_error_handler |
| 5417 | (_("ERROR: %B passes floats in integer registers, whereas %B passes them in float registers"), |
| 5418 | ibfd, obfd); |
| 5419 | |
| 5420 | flags_compatible = FALSE; |
| 5421 | } |
| 5422 | |
| 5423 | if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT)) |
| 5424 | { |
| 5425 | if (in_flags & EF_ARM_VFP_FLOAT) |
| 5426 | _bfd_error_handler |
| 5427 | (_("ERROR: %B uses VFP instructions, whereas %B does not"), |
| 5428 | ibfd, obfd); |
| 5429 | else |
| 5430 | _bfd_error_handler |
| 5431 | (_("ERROR: %B uses FPA instructions, whereas %B does not"), |
| 5432 | ibfd, obfd); |
| 5433 | |
| 5434 | flags_compatible = FALSE; |
| 5435 | } |
| 5436 | |
| 5437 | if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT)) |
| 5438 | { |
| 5439 | if (in_flags & EF_ARM_MAVERICK_FLOAT) |
| 5440 | _bfd_error_handler |
| 5441 | (_("ERROR: %B uses Maverick instructions, whereas %B does not"), |
| 5442 | ibfd, obfd); |
| 5443 | else |
| 5444 | _bfd_error_handler |
| 5445 | (_("ERROR: %B does not use Maverick instructions, whereas %B does"), |
| 5446 | ibfd, obfd); |
| 5447 | |
| 5448 | flags_compatible = FALSE; |
| 5449 | } |
| 5450 | |
| 5451 | #ifdef EF_ARM_SOFT_FLOAT |
| 5452 | if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT)) |
| 5453 | { |
| 5454 | /* We can allow interworking between code that is VFP format |
| 5455 | layout, and uses either soft float or integer regs for |
| 5456 | passing floating point arguments and results. We already |
| 5457 | know that the APCS_FLOAT flags match; similarly for VFP |
| 5458 | flags. */ |
| 5459 | if ((in_flags & EF_ARM_APCS_FLOAT) != 0 |
| 5460 | || (in_flags & EF_ARM_VFP_FLOAT) == 0) |
| 5461 | { |
| 5462 | if (in_flags & EF_ARM_SOFT_FLOAT) |
| 5463 | _bfd_error_handler |
| 5464 | (_("ERROR: %B uses software FP, whereas %B uses hardware FP"), |
| 5465 | ibfd, obfd); |
| 5466 | else |
| 5467 | _bfd_error_handler |
| 5468 | (_("ERROR: %B uses hardware FP, whereas %B uses software FP"), |
| 5469 | ibfd, obfd); |
| 5470 | |
| 5471 | flags_compatible = FALSE; |
| 5472 | } |
| 5473 | } |
| 5474 | #endif |
| 5475 | |
| 5476 | /* Interworking mismatch is only a warning. */ |
| 5477 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
| 5478 | { |
| 5479 | if (in_flags & EF_ARM_INTERWORK) |
| 5480 | { |
| 5481 | _bfd_error_handler |
| 5482 | (_("Warning: %B supports interworking, whereas %B does not"), |
| 5483 | ibfd, obfd); |
| 5484 | } |
| 5485 | else |
| 5486 | { |
| 5487 | _bfd_error_handler |
| 5488 | (_("Warning: %B does not support interworking, whereas %B does"), |
| 5489 | ibfd, obfd); |
| 5490 | } |
| 5491 | } |
| 5492 | } |
| 5493 | |
| 5494 | return flags_compatible; |
| 5495 | } |
| 5496 | |
| 5497 | /* Display the flags field. */ |
| 5498 | |
| 5499 | static bfd_boolean |
| 5500 | elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr) |
| 5501 | { |
| 5502 | FILE * file = (FILE *) ptr; |
| 5503 | unsigned long flags; |
| 5504 | |
| 5505 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 5506 | |
| 5507 | /* Print normal ELF private data. */ |
| 5508 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 5509 | |
| 5510 | flags = elf_elfheader (abfd)->e_flags; |
| 5511 | /* Ignore init flag - it may not be set, despite the flags field |
| 5512 | containing valid data. */ |
| 5513 | |
| 5514 | /* xgettext:c-format */ |
| 5515 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 5516 | |
| 5517 | switch (EF_ARM_EABI_VERSION (flags)) |
| 5518 | { |
| 5519 | case EF_ARM_EABI_UNKNOWN: |
| 5520 | /* The following flag bits are GNU extensions and not part of the |
| 5521 | official ARM ELF extended ABI. Hence they are only decoded if |
| 5522 | the EABI version is not set. */ |
| 5523 | if (flags & EF_ARM_INTERWORK) |
| 5524 | fprintf (file, _(" [interworking enabled]")); |
| 5525 | |
| 5526 | if (flags & EF_ARM_APCS_26) |
| 5527 | fprintf (file, " [APCS-26]"); |
| 5528 | else |
| 5529 | fprintf (file, " [APCS-32]"); |
| 5530 | |
| 5531 | if (flags & EF_ARM_VFP_FLOAT) |
| 5532 | fprintf (file, _(" [VFP float format]")); |
| 5533 | else if (flags & EF_ARM_MAVERICK_FLOAT) |
| 5534 | fprintf (file, _(" [Maverick float format]")); |
| 5535 | else |
| 5536 | fprintf (file, _(" [FPA float format]")); |
| 5537 | |
| 5538 | if (flags & EF_ARM_APCS_FLOAT) |
| 5539 | fprintf (file, _(" [floats passed in float registers]")); |
| 5540 | |
| 5541 | if (flags & EF_ARM_PIC) |
| 5542 | fprintf (file, _(" [position independent]")); |
| 5543 | |
| 5544 | if (flags & EF_ARM_NEW_ABI) |
| 5545 | fprintf (file, _(" [new ABI]")); |
| 5546 | |
| 5547 | if (flags & EF_ARM_OLD_ABI) |
| 5548 | fprintf (file, _(" [old ABI]")); |
| 5549 | |
| 5550 | if (flags & EF_ARM_SOFT_FLOAT) |
| 5551 | fprintf (file, _(" [software FP]")); |
| 5552 | |
| 5553 | flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT |
| 5554 | | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI |
| 5555 | | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT |
| 5556 | | EF_ARM_MAVERICK_FLOAT); |
| 5557 | break; |
| 5558 | |
| 5559 | case EF_ARM_EABI_VER1: |
| 5560 | fprintf (file, _(" [Version1 EABI]")); |
| 5561 | |
| 5562 | if (flags & EF_ARM_SYMSARESORTED) |
| 5563 | fprintf (file, _(" [sorted symbol table]")); |
| 5564 | else |
| 5565 | fprintf (file, _(" [unsorted symbol table]")); |
| 5566 | |
| 5567 | flags &= ~ EF_ARM_SYMSARESORTED; |
| 5568 | break; |
| 5569 | |
| 5570 | case EF_ARM_EABI_VER2: |
| 5571 | fprintf (file, _(" [Version2 EABI]")); |
| 5572 | |
| 5573 | if (flags & EF_ARM_SYMSARESORTED) |
| 5574 | fprintf (file, _(" [sorted symbol table]")); |
| 5575 | else |
| 5576 | fprintf (file, _(" [unsorted symbol table]")); |
| 5577 | |
| 5578 | if (flags & EF_ARM_DYNSYMSUSESEGIDX) |
| 5579 | fprintf (file, _(" [dynamic symbols use segment index]")); |
| 5580 | |
| 5581 | if (flags & EF_ARM_MAPSYMSFIRST) |
| 5582 | fprintf (file, _(" [mapping symbols precede others]")); |
| 5583 | |
| 5584 | flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX |
| 5585 | | EF_ARM_MAPSYMSFIRST); |
| 5586 | break; |
| 5587 | |
| 5588 | case EF_ARM_EABI_VER3: |
| 5589 | fprintf (file, _(" [Version3 EABI]")); |
| 5590 | break; |
| 5591 | |
| 5592 | case EF_ARM_EABI_VER4: |
| 5593 | fprintf (file, _(" [Version4 EABI]")); |
| 5594 | goto eabi; |
| 5595 | |
| 5596 | case EF_ARM_EABI_VER5: |
| 5597 | fprintf (file, _(" [Version5 EABI]")); |
| 5598 | eabi: |
| 5599 | if (flags & EF_ARM_BE8) |
| 5600 | fprintf (file, _(" [BE8]")); |
| 5601 | |
| 5602 | if (flags & EF_ARM_LE8) |
| 5603 | fprintf (file, _(" [LE8]")); |
| 5604 | |
| 5605 | flags &= ~(EF_ARM_LE8 | EF_ARM_BE8); |
| 5606 | break; |
| 5607 | |
| 5608 | default: |
| 5609 | fprintf (file, _(" <EABI version unrecognised>")); |
| 5610 | break; |
| 5611 | } |
| 5612 | |
| 5613 | flags &= ~ EF_ARM_EABIMASK; |
| 5614 | |
| 5615 | if (flags & EF_ARM_RELEXEC) |
| 5616 | fprintf (file, _(" [relocatable executable]")); |
| 5617 | |
| 5618 | if (flags & EF_ARM_HASENTRY) |
| 5619 | fprintf (file, _(" [has entry point]")); |
| 5620 | |
| 5621 | flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY); |
| 5622 | |
| 5623 | if (flags) |
| 5624 | fprintf (file, _("<Unrecognised flag bits set>")); |
| 5625 | |
| 5626 | fputc ('\n', file); |
| 5627 | |
| 5628 | return TRUE; |
| 5629 | } |
| 5630 | |
| 5631 | static int |
| 5632 | elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type) |
| 5633 | { |
| 5634 | switch (ELF_ST_TYPE (elf_sym->st_info)) |
| 5635 | { |
| 5636 | case STT_ARM_TFUNC: |
| 5637 | return ELF_ST_TYPE (elf_sym->st_info); |
| 5638 | |
| 5639 | case STT_ARM_16BIT: |
| 5640 | /* If the symbol is not an object, return the STT_ARM_16BIT flag. |
| 5641 | This allows us to distinguish between data used by Thumb instructions |
| 5642 | and non-data (which is probably code) inside Thumb regions of an |
| 5643 | executable. */ |
| 5644 | if (type != STT_OBJECT && type != STT_TLS) |
| 5645 | return ELF_ST_TYPE (elf_sym->st_info); |
| 5646 | break; |
| 5647 | |
| 5648 | default: |
| 5649 | break; |
| 5650 | } |
| 5651 | |
| 5652 | return type; |
| 5653 | } |
| 5654 | |
| 5655 | static asection * |
| 5656 | elf32_arm_gc_mark_hook (asection * sec, |
| 5657 | struct bfd_link_info * info ATTRIBUTE_UNUSED, |
| 5658 | Elf_Internal_Rela * rel, |
| 5659 | struct elf_link_hash_entry * h, |
| 5660 | Elf_Internal_Sym * sym) |
| 5661 | { |
| 5662 | if (h != NULL) |
| 5663 | { |
| 5664 | switch (ELF32_R_TYPE (rel->r_info)) |
| 5665 | { |
| 5666 | case R_ARM_GNU_VTINHERIT: |
| 5667 | case R_ARM_GNU_VTENTRY: |
| 5668 | break; |
| 5669 | |
| 5670 | default: |
| 5671 | switch (h->root.type) |
| 5672 | { |
| 5673 | case bfd_link_hash_defined: |
| 5674 | case bfd_link_hash_defweak: |
| 5675 | return h->root.u.def.section; |
| 5676 | |
| 5677 | case bfd_link_hash_common: |
| 5678 | return h->root.u.c.p->section; |
| 5679 | |
| 5680 | default: |
| 5681 | break; |
| 5682 | } |
| 5683 | } |
| 5684 | } |
| 5685 | else |
| 5686 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 5687 | |
| 5688 | return NULL; |
| 5689 | } |
| 5690 | |
| 5691 | /* Update the got entry reference counts for the section being removed. */ |
| 5692 | |
| 5693 | static bfd_boolean |
| 5694 | elf32_arm_gc_sweep_hook (bfd * abfd, |
| 5695 | struct bfd_link_info * info, |
| 5696 | asection * sec, |
| 5697 | const Elf_Internal_Rela * relocs) |
| 5698 | { |
| 5699 | Elf_Internal_Shdr *symtab_hdr; |
| 5700 | struct elf_link_hash_entry **sym_hashes; |
| 5701 | bfd_signed_vma *local_got_refcounts; |
| 5702 | const Elf_Internal_Rela *rel, *relend; |
| 5703 | struct elf32_arm_link_hash_table * globals; |
| 5704 | |
| 5705 | globals = elf32_arm_hash_table (info); |
| 5706 | |
| 5707 | elf_section_data (sec)->local_dynrel = NULL; |
| 5708 | |
| 5709 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 5710 | sym_hashes = elf_sym_hashes (abfd); |
| 5711 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 5712 | |
| 5713 | relend = relocs + sec->reloc_count; |
| 5714 | for (rel = relocs; rel < relend; rel++) |
| 5715 | { |
| 5716 | unsigned long r_symndx; |
| 5717 | struct elf_link_hash_entry *h = NULL; |
| 5718 | int r_type; |
| 5719 | |
| 5720 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 5721 | if (r_symndx >= symtab_hdr->sh_info) |
| 5722 | { |
| 5723 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 5724 | while (h->root.type == bfd_link_hash_indirect |
| 5725 | || h->root.type == bfd_link_hash_warning) |
| 5726 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5727 | } |
| 5728 | |
| 5729 | r_type = ELF32_R_TYPE (rel->r_info); |
| 5730 | r_type = arm_real_reloc_type (globals, r_type); |
| 5731 | switch (r_type) |
| 5732 | { |
| 5733 | case R_ARM_GOT32: |
| 5734 | case R_ARM_GOT_PREL: |
| 5735 | case R_ARM_TLS_GD32: |
| 5736 | case R_ARM_TLS_IE32: |
| 5737 | if (h != NULL) |
| 5738 | { |
| 5739 | if (h->got.refcount > 0) |
| 5740 | h->got.refcount -= 1; |
| 5741 | } |
| 5742 | else if (local_got_refcounts != NULL) |
| 5743 | { |
| 5744 | if (local_got_refcounts[r_symndx] > 0) |
| 5745 | local_got_refcounts[r_symndx] -= 1; |
| 5746 | } |
| 5747 | break; |
| 5748 | |
| 5749 | case R_ARM_TLS_LDM32: |
| 5750 | elf32_arm_hash_table (info)->tls_ldm_got.refcount -= 1; |
| 5751 | break; |
| 5752 | |
| 5753 | case R_ARM_ABS32: |
| 5754 | case R_ARM_REL32: |
| 5755 | case R_ARM_PC24: |
| 5756 | case R_ARM_PLT32: |
| 5757 | case R_ARM_CALL: |
| 5758 | case R_ARM_JUMP24: |
| 5759 | case R_ARM_PREL31: |
| 5760 | case R_ARM_THM_CALL: |
| 5761 | case R_ARM_MOVW_ABS_NC: |
| 5762 | case R_ARM_MOVT_ABS: |
| 5763 | case R_ARM_MOVW_PREL_NC: |
| 5764 | case R_ARM_MOVT_PREL: |
| 5765 | case R_ARM_THM_MOVW_ABS_NC: |
| 5766 | case R_ARM_THM_MOVT_ABS: |
| 5767 | case R_ARM_THM_MOVW_PREL_NC: |
| 5768 | case R_ARM_THM_MOVT_PREL: |
| 5769 | /* Should the interworking branches be here also? */ |
| 5770 | |
| 5771 | if (h != NULL) |
| 5772 | { |
| 5773 | struct elf32_arm_link_hash_entry *eh; |
| 5774 | struct elf32_arm_relocs_copied **pp; |
| 5775 | struct elf32_arm_relocs_copied *p; |
| 5776 | |
| 5777 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 5778 | |
| 5779 | if (h->plt.refcount > 0) |
| 5780 | { |
| 5781 | h->plt.refcount -= 1; |
| 5782 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_THM_CALL) |
| 5783 | eh->plt_thumb_refcount--; |
| 5784 | } |
| 5785 | |
| 5786 | if (r_type == R_ARM_ABS32 |
| 5787 | || r_type == R_ARM_REL32) |
| 5788 | { |
| 5789 | for (pp = &eh->relocs_copied; (p = *pp) != NULL; |
| 5790 | pp = &p->next) |
| 5791 | if (p->section == sec) |
| 5792 | { |
| 5793 | p->count -= 1; |
| 5794 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32) |
| 5795 | p->pc_count -= 1; |
| 5796 | if (p->count == 0) |
| 5797 | *pp = p->next; |
| 5798 | break; |
| 5799 | } |
| 5800 | } |
| 5801 | } |
| 5802 | break; |
| 5803 | |
| 5804 | default: |
| 5805 | break; |
| 5806 | } |
| 5807 | } |
| 5808 | |
| 5809 | return TRUE; |
| 5810 | } |
| 5811 | |
| 5812 | /* Look through the relocs for a section during the first phase. */ |
| 5813 | |
| 5814 | static bfd_boolean |
| 5815 | elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 5816 | asection *sec, const Elf_Internal_Rela *relocs) |
| 5817 | { |
| 5818 | Elf_Internal_Shdr *symtab_hdr; |
| 5819 | struct elf_link_hash_entry **sym_hashes; |
| 5820 | struct elf_link_hash_entry **sym_hashes_end; |
| 5821 | const Elf_Internal_Rela *rel; |
| 5822 | const Elf_Internal_Rela *rel_end; |
| 5823 | bfd *dynobj; |
| 5824 | asection *sreloc; |
| 5825 | bfd_vma *local_got_offsets; |
| 5826 | struct elf32_arm_link_hash_table *htab; |
| 5827 | |
| 5828 | if (info->relocatable) |
| 5829 | return TRUE; |
| 5830 | |
| 5831 | htab = elf32_arm_hash_table (info); |
| 5832 | sreloc = NULL; |
| 5833 | |
| 5834 | /* Create dynamic sections for relocatable executables so that we can |
| 5835 | copy relocations. */ |
| 5836 | if (htab->root.is_relocatable_executable |
| 5837 | && ! htab->root.dynamic_sections_created) |
| 5838 | { |
| 5839 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) |
| 5840 | return FALSE; |
| 5841 | } |
| 5842 | |
| 5843 | dynobj = elf_hash_table (info)->dynobj; |
| 5844 | local_got_offsets = elf_local_got_offsets (abfd); |
| 5845 | |
| 5846 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 5847 | sym_hashes = elf_sym_hashes (abfd); |
| 5848 | sym_hashes_end = sym_hashes |
| 5849 | + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
| 5850 | |
| 5851 | if (!elf_bad_symtab (abfd)) |
| 5852 | sym_hashes_end -= symtab_hdr->sh_info; |
| 5853 | |
| 5854 | rel_end = relocs + sec->reloc_count; |
| 5855 | for (rel = relocs; rel < rel_end; rel++) |
| 5856 | { |
| 5857 | struct elf_link_hash_entry *h; |
| 5858 | struct elf32_arm_link_hash_entry *eh; |
| 5859 | unsigned long r_symndx; |
| 5860 | int r_type; |
| 5861 | |
| 5862 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 5863 | r_type = ELF32_R_TYPE (rel->r_info); |
| 5864 | r_type = arm_real_reloc_type (htab, r_type); |
| 5865 | |
| 5866 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
| 5867 | { |
| 5868 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, |
| 5869 | r_symndx); |
| 5870 | return FALSE; |
| 5871 | } |
| 5872 | |
| 5873 | if (r_symndx < symtab_hdr->sh_info) |
| 5874 | h = NULL; |
| 5875 | else |
| 5876 | { |
| 5877 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 5878 | while (h->root.type == bfd_link_hash_indirect |
| 5879 | || h->root.type == bfd_link_hash_warning) |
| 5880 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 5881 | } |
| 5882 | |
| 5883 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 5884 | |
| 5885 | switch (r_type) |
| 5886 | { |
| 5887 | case R_ARM_GOT32: |
| 5888 | case R_ARM_GOT_PREL: |
| 5889 | case R_ARM_TLS_GD32: |
| 5890 | case R_ARM_TLS_IE32: |
| 5891 | /* This symbol requires a global offset table entry. */ |
| 5892 | { |
| 5893 | int tls_type, old_tls_type; |
| 5894 | |
| 5895 | switch (r_type) |
| 5896 | { |
| 5897 | case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break; |
| 5898 | case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break; |
| 5899 | default: tls_type = GOT_NORMAL; break; |
| 5900 | } |
| 5901 | |
| 5902 | if (h != NULL) |
| 5903 | { |
| 5904 | h->got.refcount++; |
| 5905 | old_tls_type = elf32_arm_hash_entry (h)->tls_type; |
| 5906 | } |
| 5907 | else |
| 5908 | { |
| 5909 | bfd_signed_vma *local_got_refcounts; |
| 5910 | |
| 5911 | /* This is a global offset table entry for a local symbol. */ |
| 5912 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 5913 | if (local_got_refcounts == NULL) |
| 5914 | { |
| 5915 | bfd_size_type size; |
| 5916 | |
| 5917 | size = symtab_hdr->sh_info; |
| 5918 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
| 5919 | local_got_refcounts = bfd_zalloc (abfd, size); |
| 5920 | if (local_got_refcounts == NULL) |
| 5921 | return FALSE; |
| 5922 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 5923 | elf32_arm_local_got_tls_type (abfd) |
| 5924 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); |
| 5925 | } |
| 5926 | local_got_refcounts[r_symndx] += 1; |
| 5927 | old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx]; |
| 5928 | } |
| 5929 | |
| 5930 | /* We will already have issued an error message if there is a |
| 5931 | TLS / non-TLS mismatch, based on the symbol type. We don't |
| 5932 | support any linker relaxations. So just combine any TLS |
| 5933 | types needed. */ |
| 5934 | if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL |
| 5935 | && tls_type != GOT_NORMAL) |
| 5936 | tls_type |= old_tls_type; |
| 5937 | |
| 5938 | if (old_tls_type != tls_type) |
| 5939 | { |
| 5940 | if (h != NULL) |
| 5941 | elf32_arm_hash_entry (h)->tls_type = tls_type; |
| 5942 | else |
| 5943 | elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type; |
| 5944 | } |
| 5945 | } |
| 5946 | /* Fall through */ |
| 5947 | |
| 5948 | case R_ARM_TLS_LDM32: |
| 5949 | if (r_type == R_ARM_TLS_LDM32) |
| 5950 | htab->tls_ldm_got.refcount++; |
| 5951 | /* Fall through */ |
| 5952 | |
| 5953 | case R_ARM_GOTOFF32: |
| 5954 | case R_ARM_GOTPC: |
| 5955 | if (htab->sgot == NULL) |
| 5956 | { |
| 5957 | if (htab->root.dynobj == NULL) |
| 5958 | htab->root.dynobj = abfd; |
| 5959 | if (!create_got_section (htab->root.dynobj, info)) |
| 5960 | return FALSE; |
| 5961 | } |
| 5962 | break; |
| 5963 | |
| 5964 | case R_ARM_ABS12: |
| 5965 | /* VxWorks uses dynamic R_ARM_ABS12 relocations for |
| 5966 | ldr __GOTT_INDEX__ offsets. */ |
| 5967 | if (!htab->vxworks_p) |
| 5968 | break; |
| 5969 | /* Fall through */ |
| 5970 | |
| 5971 | case R_ARM_ABS32: |
| 5972 | case R_ARM_REL32: |
| 5973 | case R_ARM_PC24: |
| 5974 | case R_ARM_PLT32: |
| 5975 | case R_ARM_CALL: |
| 5976 | case R_ARM_JUMP24: |
| 5977 | case R_ARM_PREL31: |
| 5978 | case R_ARM_THM_CALL: |
| 5979 | case R_ARM_MOVW_ABS_NC: |
| 5980 | case R_ARM_MOVT_ABS: |
| 5981 | case R_ARM_MOVW_PREL_NC: |
| 5982 | case R_ARM_MOVT_PREL: |
| 5983 | case R_ARM_THM_MOVW_ABS_NC: |
| 5984 | case R_ARM_THM_MOVT_ABS: |
| 5985 | case R_ARM_THM_MOVW_PREL_NC: |
| 5986 | case R_ARM_THM_MOVT_PREL: |
| 5987 | /* Should the interworking branches be listed here? */ |
| 5988 | if (h != NULL) |
| 5989 | { |
| 5990 | /* If this reloc is in a read-only section, we might |
| 5991 | need a copy reloc. We can't check reliably at this |
| 5992 | stage whether the section is read-only, as input |
| 5993 | sections have not yet been mapped to output sections. |
| 5994 | Tentatively set the flag for now, and correct in |
| 5995 | adjust_dynamic_symbol. */ |
| 5996 | if (!info->shared) |
| 5997 | h->non_got_ref = 1; |
| 5998 | |
| 5999 | /* We may need a .plt entry if the function this reloc |
| 6000 | refers to is in a different object. We can't tell for |
| 6001 | sure yet, because something later might force the |
| 6002 | symbol local. */ |
| 6003 | if (r_type != R_ARM_ABS32 && r_type != R_ARM_REL32) |
| 6004 | h->needs_plt = 1; |
| 6005 | |
| 6006 | /* If we create a PLT entry, this relocation will reference |
| 6007 | it, even if it's an ABS32 relocation. */ |
| 6008 | h->plt.refcount += 1; |
| 6009 | |
| 6010 | if (r_type == R_ARM_THM_CALL) |
| 6011 | eh->plt_thumb_refcount += 1; |
| 6012 | } |
| 6013 | |
| 6014 | /* If we are creating a shared library or relocatable executable, |
| 6015 | and this is a reloc against a global symbol, or a non PC |
| 6016 | relative reloc against a local symbol, then we need to copy |
| 6017 | the reloc into the shared library. However, if we are linking |
| 6018 | with -Bsymbolic, we do not need to copy a reloc against a |
| 6019 | global symbol which is defined in an object we are |
| 6020 | including in the link (i.e., DEF_REGULAR is set). At |
| 6021 | this point we have not seen all the input files, so it is |
| 6022 | possible that DEF_REGULAR is not set now but will be set |
| 6023 | later (it is never cleared). We account for that |
| 6024 | possibility below by storing information in the |
| 6025 | relocs_copied field of the hash table entry. */ |
| 6026 | if ((info->shared || htab->root.is_relocatable_executable) |
| 6027 | && (sec->flags & SEC_ALLOC) != 0 |
| 6028 | && (r_type == R_ARM_ABS32 |
| 6029 | || (h != NULL && ! h->needs_plt |
| 6030 | && (! info->symbolic || ! h->def_regular)))) |
| 6031 | { |
| 6032 | struct elf32_arm_relocs_copied *p, **head; |
| 6033 | |
| 6034 | /* When creating a shared object, we must copy these |
| 6035 | reloc types into the output file. We create a reloc |
| 6036 | section in dynobj and make room for this reloc. */ |
| 6037 | if (sreloc == NULL) |
| 6038 | { |
| 6039 | const char * name; |
| 6040 | |
| 6041 | name = (bfd_elf_string_from_elf_section |
| 6042 | (abfd, |
| 6043 | elf_elfheader (abfd)->e_shstrndx, |
| 6044 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 6045 | if (name == NULL) |
| 6046 | return FALSE; |
| 6047 | |
| 6048 | BFD_ASSERT (reloc_section_p (htab, name, sec)); |
| 6049 | |
| 6050 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 6051 | if (sreloc == NULL) |
| 6052 | { |
| 6053 | flagword flags; |
| 6054 | |
| 6055 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 6056 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 6057 | if ((sec->flags & SEC_ALLOC) != 0 |
| 6058 | /* BPABI objects never have dynamic |
| 6059 | relocations mapped. */ |
| 6060 | && !htab->symbian_p) |
| 6061 | flags |= SEC_ALLOC | SEC_LOAD; |
| 6062 | sreloc = bfd_make_section_with_flags (dynobj, |
| 6063 | name, |
| 6064 | flags); |
| 6065 | if (sreloc == NULL |
| 6066 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) |
| 6067 | return FALSE; |
| 6068 | } |
| 6069 | |
| 6070 | elf_section_data (sec)->sreloc = sreloc; |
| 6071 | } |
| 6072 | |
| 6073 | /* If this is a global symbol, we count the number of |
| 6074 | relocations we need for this symbol. */ |
| 6075 | if (h != NULL) |
| 6076 | { |
| 6077 | head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied; |
| 6078 | } |
| 6079 | else |
| 6080 | { |
| 6081 | /* Track dynamic relocs needed for local syms too. |
| 6082 | We really need local syms available to do this |
| 6083 | easily. Oh well. */ |
| 6084 | |
| 6085 | asection *s; |
| 6086 | void *vpp; |
| 6087 | |
| 6088 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| 6089 | sec, r_symndx); |
| 6090 | if (s == NULL) |
| 6091 | return FALSE; |
| 6092 | |
| 6093 | vpp = &elf_section_data (s)->local_dynrel; |
| 6094 | head = (struct elf32_arm_relocs_copied **) vpp; |
| 6095 | } |
| 6096 | |
| 6097 | p = *head; |
| 6098 | if (p == NULL || p->section != sec) |
| 6099 | { |
| 6100 | bfd_size_type amt = sizeof *p; |
| 6101 | |
| 6102 | p = bfd_alloc (htab->root.dynobj, amt); |
| 6103 | if (p == NULL) |
| 6104 | return FALSE; |
| 6105 | p->next = *head; |
| 6106 | *head = p; |
| 6107 | p->section = sec; |
| 6108 | p->count = 0; |
| 6109 | p->pc_count = 0; |
| 6110 | } |
| 6111 | |
| 6112 | if (r_type == R_ARM_REL32) |
| 6113 | p->pc_count += 1; |
| 6114 | p->count += 1; |
| 6115 | } |
| 6116 | break; |
| 6117 | |
| 6118 | /* This relocation describes the C++ object vtable hierarchy. |
| 6119 | Reconstruct it for later use during GC. */ |
| 6120 | case R_ARM_GNU_VTINHERIT: |
| 6121 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 6122 | return FALSE; |
| 6123 | break; |
| 6124 | |
| 6125 | /* This relocation describes which C++ vtable entries are actually |
| 6126 | used. Record for later use during GC. */ |
| 6127 | case R_ARM_GNU_VTENTRY: |
| 6128 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
| 6129 | return FALSE; |
| 6130 | break; |
| 6131 | } |
| 6132 | } |
| 6133 | |
| 6134 | return TRUE; |
| 6135 | } |
| 6136 | |
| 6137 | /* Treat mapping symbols as special target symbols. */ |
| 6138 | |
| 6139 | static bfd_boolean |
| 6140 | elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym) |
| 6141 | { |
| 6142 | return bfd_is_arm_special_symbol_name (sym->name, |
| 6143 | BFD_ARM_SPECIAL_SYM_TYPE_ANY); |
| 6144 | } |
| 6145 | |
| 6146 | /* This is a copy of elf_find_function() from elf.c except that |
| 6147 | ARM mapping symbols are ignored when looking for function names |
| 6148 | and STT_ARM_TFUNC is considered to a function type. */ |
| 6149 | |
| 6150 | static bfd_boolean |
| 6151 | arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED, |
| 6152 | asection * section, |
| 6153 | asymbol ** symbols, |
| 6154 | bfd_vma offset, |
| 6155 | const char ** filename_ptr, |
| 6156 | const char ** functionname_ptr) |
| 6157 | { |
| 6158 | const char * filename = NULL; |
| 6159 | asymbol * func = NULL; |
| 6160 | bfd_vma low_func = 0; |
| 6161 | asymbol ** p; |
| 6162 | |
| 6163 | for (p = symbols; *p != NULL; p++) |
| 6164 | { |
| 6165 | elf_symbol_type *q; |
| 6166 | |
| 6167 | q = (elf_symbol_type *) *p; |
| 6168 | |
| 6169 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) |
| 6170 | { |
| 6171 | default: |
| 6172 | break; |
| 6173 | case STT_FILE: |
| 6174 | filename = bfd_asymbol_name (&q->symbol); |
| 6175 | break; |
| 6176 | case STT_FUNC: |
| 6177 | case STT_ARM_TFUNC: |
| 6178 | case STT_NOTYPE: |
| 6179 | /* Skip mapping symbols. */ |
| 6180 | if ((q->symbol.flags & BSF_LOCAL) |
| 6181 | && bfd_is_arm_special_symbol_name (q->symbol.name, |
| 6182 | BFD_ARM_SPECIAL_SYM_TYPE_ANY)) |
| 6183 | continue; |
| 6184 | /* Fall through. */ |
| 6185 | if (bfd_get_section (&q->symbol) == section |
| 6186 | && q->symbol.value >= low_func |
| 6187 | && q->symbol.value <= offset) |
| 6188 | { |
| 6189 | func = (asymbol *) q; |
| 6190 | low_func = q->symbol.value; |
| 6191 | } |
| 6192 | break; |
| 6193 | } |
| 6194 | } |
| 6195 | |
| 6196 | if (func == NULL) |
| 6197 | return FALSE; |
| 6198 | |
| 6199 | if (filename_ptr) |
| 6200 | *filename_ptr = filename; |
| 6201 | if (functionname_ptr) |
| 6202 | *functionname_ptr = bfd_asymbol_name (func); |
| 6203 | |
| 6204 | return TRUE; |
| 6205 | } |
| 6206 | |
| 6207 | |
| 6208 | /* Find the nearest line to a particular section and offset, for error |
| 6209 | reporting. This code is a duplicate of the code in elf.c, except |
| 6210 | that it uses arm_elf_find_function. */ |
| 6211 | |
| 6212 | static bfd_boolean |
| 6213 | elf32_arm_find_nearest_line (bfd * abfd, |
| 6214 | asection * section, |
| 6215 | asymbol ** symbols, |
| 6216 | bfd_vma offset, |
| 6217 | const char ** filename_ptr, |
| 6218 | const char ** functionname_ptr, |
| 6219 | unsigned int * line_ptr) |
| 6220 | { |
| 6221 | bfd_boolean found = FALSE; |
| 6222 | |
| 6223 | /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */ |
| 6224 | |
| 6225 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, |
| 6226 | filename_ptr, functionname_ptr, |
| 6227 | line_ptr, 0, |
| 6228 | & elf_tdata (abfd)->dwarf2_find_line_info)) |
| 6229 | { |
| 6230 | if (!*functionname_ptr) |
| 6231 | arm_elf_find_function (abfd, section, symbols, offset, |
| 6232 | *filename_ptr ? NULL : filename_ptr, |
| 6233 | functionname_ptr); |
| 6234 | |
| 6235 | return TRUE; |
| 6236 | } |
| 6237 | |
| 6238 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
| 6239 | & found, filename_ptr, |
| 6240 | functionname_ptr, line_ptr, |
| 6241 | & elf_tdata (abfd)->line_info)) |
| 6242 | return FALSE; |
| 6243 | |
| 6244 | if (found && (*functionname_ptr || *line_ptr)) |
| 6245 | return TRUE; |
| 6246 | |
| 6247 | if (symbols == NULL) |
| 6248 | return FALSE; |
| 6249 | |
| 6250 | if (! arm_elf_find_function (abfd, section, symbols, offset, |
| 6251 | filename_ptr, functionname_ptr)) |
| 6252 | return FALSE; |
| 6253 | |
| 6254 | *line_ptr = 0; |
| 6255 | return TRUE; |
| 6256 | } |
| 6257 | |
| 6258 | static bfd_boolean |
| 6259 | elf32_arm_find_inliner_info (bfd * abfd, |
| 6260 | const char ** filename_ptr, |
| 6261 | const char ** functionname_ptr, |
| 6262 | unsigned int * line_ptr) |
| 6263 | { |
| 6264 | bfd_boolean found; |
| 6265 | found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr, |
| 6266 | functionname_ptr, line_ptr, |
| 6267 | & elf_tdata (abfd)->dwarf2_find_line_info); |
| 6268 | return found; |
| 6269 | } |
| 6270 | |
| 6271 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 6272 | regular object. The current definition is in some section of the |
| 6273 | dynamic object, but we're not including those sections. We have to |
| 6274 | change the definition to something the rest of the link can |
| 6275 | understand. */ |
| 6276 | |
| 6277 | static bfd_boolean |
| 6278 | elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info, |
| 6279 | struct elf_link_hash_entry * h) |
| 6280 | { |
| 6281 | bfd * dynobj; |
| 6282 | asection * s; |
| 6283 | unsigned int power_of_two; |
| 6284 | struct elf32_arm_link_hash_entry * eh; |
| 6285 | struct elf32_arm_link_hash_table *globals; |
| 6286 | |
| 6287 | globals = elf32_arm_hash_table (info); |
| 6288 | dynobj = elf_hash_table (info)->dynobj; |
| 6289 | |
| 6290 | /* Make sure we know what is going on here. */ |
| 6291 | BFD_ASSERT (dynobj != NULL |
| 6292 | && (h->needs_plt |
| 6293 | || h->u.weakdef != NULL |
| 6294 | || (h->def_dynamic |
| 6295 | && h->ref_regular |
| 6296 | && !h->def_regular))); |
| 6297 | |
| 6298 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 6299 | |
| 6300 | /* If this is a function, put it in the procedure linkage table. We |
| 6301 | will fill in the contents of the procedure linkage table later, |
| 6302 | when we know the address of the .got section. */ |
| 6303 | if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC |
| 6304 | || h->needs_plt) |
| 6305 | { |
| 6306 | if (h->plt.refcount <= 0 |
| 6307 | || SYMBOL_CALLS_LOCAL (info, h) |
| 6308 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 6309 | && h->root.type == bfd_link_hash_undefweak)) |
| 6310 | { |
| 6311 | /* This case can occur if we saw a PLT32 reloc in an input |
| 6312 | file, but the symbol was never referred to by a dynamic |
| 6313 | object, or if all references were garbage collected. In |
| 6314 | such a case, we don't actually need to build a procedure |
| 6315 | linkage table, and we can just do a PC24 reloc instead. */ |
| 6316 | h->plt.offset = (bfd_vma) -1; |
| 6317 | eh->plt_thumb_refcount = 0; |
| 6318 | h->needs_plt = 0; |
| 6319 | } |
| 6320 | |
| 6321 | return TRUE; |
| 6322 | } |
| 6323 | else |
| 6324 | { |
| 6325 | /* It's possible that we incorrectly decided a .plt reloc was |
| 6326 | needed for an R_ARM_PC24 or similar reloc to a non-function sym |
| 6327 | in check_relocs. We can't decide accurately between function |
| 6328 | and non-function syms in check-relocs; Objects loaded later in |
| 6329 | the link may change h->type. So fix it now. */ |
| 6330 | h->plt.offset = (bfd_vma) -1; |
| 6331 | eh->plt_thumb_refcount = 0; |
| 6332 | } |
| 6333 | |
| 6334 | /* If this is a weak symbol, and there is a real definition, the |
| 6335 | processor independent code will have arranged for us to see the |
| 6336 | real definition first, and we can just use the same value. */ |
| 6337 | if (h->u.weakdef != NULL) |
| 6338 | { |
| 6339 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 6340 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 6341 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 6342 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 6343 | return TRUE; |
| 6344 | } |
| 6345 | |
| 6346 | /* If there are no non-GOT references, we do not need a copy |
| 6347 | relocation. */ |
| 6348 | if (!h->non_got_ref) |
| 6349 | return TRUE; |
| 6350 | |
| 6351 | /* This is a reference to a symbol defined by a dynamic object which |
| 6352 | is not a function. */ |
| 6353 | |
| 6354 | /* If we are creating a shared library, we must presume that the |
| 6355 | only references to the symbol are via the global offset table. |
| 6356 | For such cases we need not do anything here; the relocations will |
| 6357 | be handled correctly by relocate_section. Relocatable executables |
| 6358 | can reference data in shared objects directly, so we don't need to |
| 6359 | do anything here. */ |
| 6360 | if (info->shared || globals->root.is_relocatable_executable) |
| 6361 | return TRUE; |
| 6362 | |
| 6363 | if (h->size == 0) |
| 6364 | { |
| 6365 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), |
| 6366 | h->root.root.string); |
| 6367 | return TRUE; |
| 6368 | } |
| 6369 | |
| 6370 | /* We must allocate the symbol in our .dynbss section, which will |
| 6371 | become part of the .bss section of the executable. There will be |
| 6372 | an entry for this symbol in the .dynsym section. The dynamic |
| 6373 | object will contain position independent code, so all references |
| 6374 | from the dynamic object to this symbol will go through the global |
| 6375 | offset table. The dynamic linker will use the .dynsym entry to |
| 6376 | determine the address it must put in the global offset table, so |
| 6377 | both the dynamic object and the regular object will refer to the |
| 6378 | same memory location for the variable. */ |
| 6379 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 6380 | BFD_ASSERT (s != NULL); |
| 6381 | |
| 6382 | /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to |
| 6383 | copy the initial value out of the dynamic object and into the |
| 6384 | runtime process image. We need to remember the offset into the |
| 6385 | .rel(a).bss section we are going to use. */ |
| 6386 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 6387 | { |
| 6388 | asection *srel; |
| 6389 | |
| 6390 | srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss")); |
| 6391 | BFD_ASSERT (srel != NULL); |
| 6392 | srel->size += RELOC_SIZE (globals); |
| 6393 | h->needs_copy = 1; |
| 6394 | } |
| 6395 | |
| 6396 | /* We need to figure out the alignment required for this symbol. I |
| 6397 | have no idea how ELF linkers handle this. */ |
| 6398 | power_of_two = bfd_log2 (h->size); |
| 6399 | if (power_of_two > 3) |
| 6400 | power_of_two = 3; |
| 6401 | |
| 6402 | /* Apply the required alignment. */ |
| 6403 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
| 6404 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 6405 | { |
| 6406 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 6407 | return FALSE; |
| 6408 | } |
| 6409 | |
| 6410 | /* Define the symbol as being at this point in the section. */ |
| 6411 | h->root.u.def.section = s; |
| 6412 | h->root.u.def.value = s->size; |
| 6413 | |
| 6414 | /* Increment the section size to make room for the symbol. */ |
| 6415 | s->size += h->size; |
| 6416 | |
| 6417 | return TRUE; |
| 6418 | } |
| 6419 | |
| 6420 | /* Allocate space in .plt, .got and associated reloc sections for |
| 6421 | dynamic relocs. */ |
| 6422 | |
| 6423 | static bfd_boolean |
| 6424 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
| 6425 | { |
| 6426 | struct bfd_link_info *info; |
| 6427 | struct elf32_arm_link_hash_table *htab; |
| 6428 | struct elf32_arm_link_hash_entry *eh; |
| 6429 | struct elf32_arm_relocs_copied *p; |
| 6430 | |
| 6431 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 6432 | |
| 6433 | if (h->root.type == bfd_link_hash_indirect) |
| 6434 | return TRUE; |
| 6435 | |
| 6436 | if (h->root.type == bfd_link_hash_warning) |
| 6437 | /* When warning symbols are created, they **replace** the "real" |
| 6438 | entry in the hash table, thus we never get to see the real |
| 6439 | symbol in a hash traversal. So look at it now. */ |
| 6440 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 6441 | |
| 6442 | info = (struct bfd_link_info *) inf; |
| 6443 | htab = elf32_arm_hash_table (info); |
| 6444 | |
| 6445 | if (htab->root.dynamic_sections_created |
| 6446 | && h->plt.refcount > 0) |
| 6447 | { |
| 6448 | /* Make sure this symbol is output as a dynamic symbol. |
| 6449 | Undefined weak syms won't yet be marked as dynamic. */ |
| 6450 | if (h->dynindx == -1 |
| 6451 | && !h->forced_local) |
| 6452 | { |
| 6453 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6454 | return FALSE; |
| 6455 | } |
| 6456 | |
| 6457 | if (info->shared |
| 6458 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 6459 | { |
| 6460 | asection *s = htab->splt; |
| 6461 | |
| 6462 | /* If this is the first .plt entry, make room for the special |
| 6463 | first entry. */ |
| 6464 | if (s->size == 0) |
| 6465 | s->size += htab->plt_header_size; |
| 6466 | |
| 6467 | h->plt.offset = s->size; |
| 6468 | |
| 6469 | /* If we will insert a Thumb trampoline before this PLT, leave room |
| 6470 | for it. */ |
| 6471 | if (!htab->use_blx && eh->plt_thumb_refcount > 0) |
| 6472 | { |
| 6473 | h->plt.offset += PLT_THUMB_STUB_SIZE; |
| 6474 | s->size += PLT_THUMB_STUB_SIZE; |
| 6475 | } |
| 6476 | |
| 6477 | /* If this symbol is not defined in a regular file, and we are |
| 6478 | not generating a shared library, then set the symbol to this |
| 6479 | location in the .plt. This is required to make function |
| 6480 | pointers compare as equal between the normal executable and |
| 6481 | the shared library. */ |
| 6482 | if (! info->shared |
| 6483 | && !h->def_regular) |
| 6484 | { |
| 6485 | h->root.u.def.section = s; |
| 6486 | h->root.u.def.value = h->plt.offset; |
| 6487 | |
| 6488 | /* Make sure the function is not marked as Thumb, in case |
| 6489 | it is the target of an ABS32 relocation, which will |
| 6490 | point to the PLT entry. */ |
| 6491 | if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC) |
| 6492 | h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC); |
| 6493 | } |
| 6494 | |
| 6495 | /* Make room for this entry. */ |
| 6496 | s->size += htab->plt_entry_size; |
| 6497 | |
| 6498 | if (!htab->symbian_p) |
| 6499 | { |
| 6500 | /* We also need to make an entry in the .got.plt section, which |
| 6501 | will be placed in the .got section by the linker script. */ |
| 6502 | eh->plt_got_offset = htab->sgotplt->size; |
| 6503 | htab->sgotplt->size += 4; |
| 6504 | } |
| 6505 | |
| 6506 | /* We also need to make an entry in the .rel(a).plt section. */ |
| 6507 | htab->srelplt->size += RELOC_SIZE (htab); |
| 6508 | |
| 6509 | /* VxWorks executables have a second set of relocations for |
| 6510 | each PLT entry. They go in a separate relocation section, |
| 6511 | which is processed by the kernel loader. */ |
| 6512 | if (htab->vxworks_p && !info->shared) |
| 6513 | { |
| 6514 | /* There is a relocation for the initial PLT entry: |
| 6515 | an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */ |
| 6516 | if (h->plt.offset == htab->plt_header_size) |
| 6517 | htab->srelplt2->size += RELOC_SIZE (htab); |
| 6518 | |
| 6519 | /* There are two extra relocations for each subsequent |
| 6520 | PLT entry: an R_ARM_32 relocation for the GOT entry, |
| 6521 | and an R_ARM_32 relocation for the PLT entry. */ |
| 6522 | htab->srelplt2->size += RELOC_SIZE (htab) * 2; |
| 6523 | } |
| 6524 | } |
| 6525 | else |
| 6526 | { |
| 6527 | h->plt.offset = (bfd_vma) -1; |
| 6528 | h->needs_plt = 0; |
| 6529 | } |
| 6530 | } |
| 6531 | else |
| 6532 | { |
| 6533 | h->plt.offset = (bfd_vma) -1; |
| 6534 | h->needs_plt = 0; |
| 6535 | } |
| 6536 | |
| 6537 | if (h->got.refcount > 0) |
| 6538 | { |
| 6539 | asection *s; |
| 6540 | bfd_boolean dyn; |
| 6541 | int tls_type = elf32_arm_hash_entry (h)->tls_type; |
| 6542 | int indx; |
| 6543 | |
| 6544 | /* Make sure this symbol is output as a dynamic symbol. |
| 6545 | Undefined weak syms won't yet be marked as dynamic. */ |
| 6546 | if (h->dynindx == -1 |
| 6547 | && !h->forced_local) |
| 6548 | { |
| 6549 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6550 | return FALSE; |
| 6551 | } |
| 6552 | |
| 6553 | if (!htab->symbian_p) |
| 6554 | { |
| 6555 | s = htab->sgot; |
| 6556 | h->got.offset = s->size; |
| 6557 | |
| 6558 | if (tls_type == GOT_UNKNOWN) |
| 6559 | abort (); |
| 6560 | |
| 6561 | if (tls_type == GOT_NORMAL) |
| 6562 | /* Non-TLS symbols need one GOT slot. */ |
| 6563 | s->size += 4; |
| 6564 | else |
| 6565 | { |
| 6566 | if (tls_type & GOT_TLS_GD) |
| 6567 | /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */ |
| 6568 | s->size += 8; |
| 6569 | if (tls_type & GOT_TLS_IE) |
| 6570 | /* R_ARM_TLS_IE32 needs one GOT slot. */ |
| 6571 | s->size += 4; |
| 6572 | } |
| 6573 | |
| 6574 | dyn = htab->root.dynamic_sections_created; |
| 6575 | |
| 6576 | indx = 0; |
| 6577 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 6578 | && (!info->shared |
| 6579 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 6580 | indx = h->dynindx; |
| 6581 | |
| 6582 | if (tls_type != GOT_NORMAL |
| 6583 | && (info->shared || indx != 0) |
| 6584 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 6585 | || h->root.type != bfd_link_hash_undefweak)) |
| 6586 | { |
| 6587 | if (tls_type & GOT_TLS_IE) |
| 6588 | htab->srelgot->size += RELOC_SIZE (htab); |
| 6589 | |
| 6590 | if (tls_type & GOT_TLS_GD) |
| 6591 | htab->srelgot->size += RELOC_SIZE (htab); |
| 6592 | |
| 6593 | if ((tls_type & GOT_TLS_GD) && indx != 0) |
| 6594 | htab->srelgot->size += RELOC_SIZE (htab); |
| 6595 | } |
| 6596 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 6597 | || h->root.type != bfd_link_hash_undefweak) |
| 6598 | && (info->shared |
| 6599 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 6600 | htab->srelgot->size += RELOC_SIZE (htab); |
| 6601 | } |
| 6602 | } |
| 6603 | else |
| 6604 | h->got.offset = (bfd_vma) -1; |
| 6605 | |
| 6606 | if (eh->relocs_copied == NULL) |
| 6607 | return TRUE; |
| 6608 | |
| 6609 | /* In the shared -Bsymbolic case, discard space allocated for |
| 6610 | dynamic pc-relative relocs against symbols which turn out to be |
| 6611 | defined in regular objects. For the normal shared case, discard |
| 6612 | space for pc-relative relocs that have become local due to symbol |
| 6613 | visibility changes. */ |
| 6614 | |
| 6615 | if (info->shared || htab->root.is_relocatable_executable) |
| 6616 | { |
| 6617 | /* The only reloc that uses pc_count is R_ARM_REL32, which will |
| 6618 | appear on something like ".long foo - .". We want calls to |
| 6619 | protected symbols to resolve directly to the function rather |
| 6620 | than going via the plt. If people want function pointer |
| 6621 | comparisons to work as expected then they should avoid |
| 6622 | writing assembly like ".long foo - .". */ |
| 6623 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 6624 | { |
| 6625 | struct elf32_arm_relocs_copied **pp; |
| 6626 | |
| 6627 | for (pp = &eh->relocs_copied; (p = *pp) != NULL; ) |
| 6628 | { |
| 6629 | p->count -= p->pc_count; |
| 6630 | p->pc_count = 0; |
| 6631 | if (p->count == 0) |
| 6632 | *pp = p->next; |
| 6633 | else |
| 6634 | pp = &p->next; |
| 6635 | } |
| 6636 | } |
| 6637 | |
| 6638 | /* Also discard relocs on undefined weak syms with non-default |
| 6639 | visibility. */ |
| 6640 | if (eh->relocs_copied != NULL |
| 6641 | && h->root.type == bfd_link_hash_undefweak) |
| 6642 | { |
| 6643 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 6644 | eh->relocs_copied = NULL; |
| 6645 | |
| 6646 | /* Make sure undefined weak symbols are output as a dynamic |
| 6647 | symbol in PIEs. */ |
| 6648 | else if (h->dynindx == -1 |
| 6649 | && !h->forced_local) |
| 6650 | { |
| 6651 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6652 | return FALSE; |
| 6653 | } |
| 6654 | } |
| 6655 | |
| 6656 | else if (htab->root.is_relocatable_executable && h->dynindx == -1 |
| 6657 | && h->root.type == bfd_link_hash_new) |
| 6658 | { |
| 6659 | /* Output absolute symbols so that we can create relocations |
| 6660 | against them. For normal symbols we output a relocation |
| 6661 | against the section that contains them. */ |
| 6662 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6663 | return FALSE; |
| 6664 | } |
| 6665 | |
| 6666 | } |
| 6667 | else |
| 6668 | { |
| 6669 | /* For the non-shared case, discard space for relocs against |
| 6670 | symbols which turn out to need copy relocs or are not |
| 6671 | dynamic. */ |
| 6672 | |
| 6673 | if (!h->non_got_ref |
| 6674 | && ((h->def_dynamic |
| 6675 | && !h->def_regular) |
| 6676 | || (htab->root.dynamic_sections_created |
| 6677 | && (h->root.type == bfd_link_hash_undefweak |
| 6678 | || h->root.type == bfd_link_hash_undefined)))) |
| 6679 | { |
| 6680 | /* Make sure this symbol is output as a dynamic symbol. |
| 6681 | Undefined weak syms won't yet be marked as dynamic. */ |
| 6682 | if (h->dynindx == -1 |
| 6683 | && !h->forced_local) |
| 6684 | { |
| 6685 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 6686 | return FALSE; |
| 6687 | } |
| 6688 | |
| 6689 | /* If that succeeded, we know we'll be keeping all the |
| 6690 | relocs. */ |
| 6691 | if (h->dynindx != -1) |
| 6692 | goto keep; |
| 6693 | } |
| 6694 | |
| 6695 | eh->relocs_copied = NULL; |
| 6696 | |
| 6697 | keep: ; |
| 6698 | } |
| 6699 | |
| 6700 | /* Finally, allocate space. */ |
| 6701 | for (p = eh->relocs_copied; p != NULL; p = p->next) |
| 6702 | { |
| 6703 | asection *sreloc = elf_section_data (p->section)->sreloc; |
| 6704 | sreloc->size += p->count * RELOC_SIZE (htab); |
| 6705 | } |
| 6706 | |
| 6707 | return TRUE; |
| 6708 | } |
| 6709 | |
| 6710 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 6711 | |
| 6712 | static bfd_boolean |
| 6713 | elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry *h, PTR inf) |
| 6714 | { |
| 6715 | struct elf32_arm_link_hash_entry *eh; |
| 6716 | struct elf32_arm_relocs_copied *p; |
| 6717 | |
| 6718 | if (h->root.type == bfd_link_hash_warning) |
| 6719 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 6720 | |
| 6721 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 6722 | for (p = eh->relocs_copied; p != NULL; p = p->next) |
| 6723 | { |
| 6724 | asection *s = p->section; |
| 6725 | |
| 6726 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 6727 | { |
| 6728 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 6729 | |
| 6730 | info->flags |= DF_TEXTREL; |
| 6731 | |
| 6732 | /* Not an error, just cut short the traversal. */ |
| 6733 | return FALSE; |
| 6734 | } |
| 6735 | } |
| 6736 | return TRUE; |
| 6737 | } |
| 6738 | |
| 6739 | /* Set the sizes of the dynamic sections. */ |
| 6740 | |
| 6741 | static bfd_boolean |
| 6742 | elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 6743 | struct bfd_link_info * info) |
| 6744 | { |
| 6745 | bfd * dynobj; |
| 6746 | asection * s; |
| 6747 | bfd_boolean plt; |
| 6748 | bfd_boolean relocs; |
| 6749 | bfd *ibfd; |
| 6750 | struct elf32_arm_link_hash_table *htab; |
| 6751 | |
| 6752 | htab = elf32_arm_hash_table (info); |
| 6753 | dynobj = elf_hash_table (info)->dynobj; |
| 6754 | BFD_ASSERT (dynobj != NULL); |
| 6755 | check_use_blx (htab); |
| 6756 | |
| 6757 | if (elf_hash_table (info)->dynamic_sections_created) |
| 6758 | { |
| 6759 | /* Set the contents of the .interp section to the interpreter. */ |
| 6760 | if (info->executable) |
| 6761 | { |
| 6762 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 6763 | BFD_ASSERT (s != NULL); |
| 6764 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 6765 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 6766 | } |
| 6767 | } |
| 6768 | |
| 6769 | /* Set up .got offsets for local syms, and space for local dynamic |
| 6770 | relocs. */ |
| 6771 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 6772 | { |
| 6773 | bfd_signed_vma *local_got; |
| 6774 | bfd_signed_vma *end_local_got; |
| 6775 | char *local_tls_type; |
| 6776 | bfd_size_type locsymcount; |
| 6777 | Elf_Internal_Shdr *symtab_hdr; |
| 6778 | asection *srel; |
| 6779 | |
| 6780 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 6781 | continue; |
| 6782 | |
| 6783 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 6784 | { |
| 6785 | struct elf32_arm_relocs_copied *p; |
| 6786 | |
| 6787 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
| 6788 | { |
| 6789 | if (!bfd_is_abs_section (p->section) |
| 6790 | && bfd_is_abs_section (p->section->output_section)) |
| 6791 | { |
| 6792 | /* Input section has been discarded, either because |
| 6793 | it is a copy of a linkonce section or due to |
| 6794 | linker script /DISCARD/, so we'll be discarding |
| 6795 | the relocs too. */ |
| 6796 | } |
| 6797 | else if (p->count != 0) |
| 6798 | { |
| 6799 | srel = elf_section_data (p->section)->sreloc; |
| 6800 | srel->size += p->count * RELOC_SIZE (htab); |
| 6801 | if ((p->section->output_section->flags & SEC_READONLY) != 0) |
| 6802 | info->flags |= DF_TEXTREL; |
| 6803 | } |
| 6804 | } |
| 6805 | } |
| 6806 | |
| 6807 | local_got = elf_local_got_refcounts (ibfd); |
| 6808 | if (!local_got) |
| 6809 | continue; |
| 6810 | |
| 6811 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 6812 | locsymcount = symtab_hdr->sh_info; |
| 6813 | end_local_got = local_got + locsymcount; |
| 6814 | local_tls_type = elf32_arm_local_got_tls_type (ibfd); |
| 6815 | s = htab->sgot; |
| 6816 | srel = htab->srelgot; |
| 6817 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
| 6818 | { |
| 6819 | if (*local_got > 0) |
| 6820 | { |
| 6821 | *local_got = s->size; |
| 6822 | if (*local_tls_type & GOT_TLS_GD) |
| 6823 | /* TLS_GD relocs need an 8-byte structure in the GOT. */ |
| 6824 | s->size += 8; |
| 6825 | if (*local_tls_type & GOT_TLS_IE) |
| 6826 | s->size += 4; |
| 6827 | if (*local_tls_type == GOT_NORMAL) |
| 6828 | s->size += 4; |
| 6829 | |
| 6830 | if (info->shared || *local_tls_type == GOT_TLS_GD) |
| 6831 | srel->size += RELOC_SIZE (htab); |
| 6832 | } |
| 6833 | else |
| 6834 | *local_got = (bfd_vma) -1; |
| 6835 | } |
| 6836 | } |
| 6837 | |
| 6838 | if (htab->tls_ldm_got.refcount > 0) |
| 6839 | { |
| 6840 | /* Allocate two GOT entries and one dynamic relocation (if necessary) |
| 6841 | for R_ARM_TLS_LDM32 relocations. */ |
| 6842 | htab->tls_ldm_got.offset = htab->sgot->size; |
| 6843 | htab->sgot->size += 8; |
| 6844 | if (info->shared) |
| 6845 | htab->srelgot->size += RELOC_SIZE (htab); |
| 6846 | } |
| 6847 | else |
| 6848 | htab->tls_ldm_got.offset = -1; |
| 6849 | |
| 6850 | /* Allocate global sym .plt and .got entries, and space for global |
| 6851 | sym dynamic relocs. */ |
| 6852 | elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info); |
| 6853 | |
| 6854 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 6855 | determined the sizes of the various dynamic sections. Allocate |
| 6856 | memory for them. */ |
| 6857 | plt = FALSE; |
| 6858 | relocs = FALSE; |
| 6859 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 6860 | { |
| 6861 | const char * name; |
| 6862 | |
| 6863 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 6864 | continue; |
| 6865 | |
| 6866 | /* It's OK to base decisions on the section name, because none |
| 6867 | of the dynobj section names depend upon the input files. */ |
| 6868 | name = bfd_get_section_name (dynobj, s); |
| 6869 | |
| 6870 | if (strcmp (name, ".plt") == 0) |
| 6871 | { |
| 6872 | /* Remember whether there is a PLT. */ |
| 6873 | plt = s->size != 0; |
| 6874 | } |
| 6875 | else if (strncmp (name, ".rel", 4) == 0) |
| 6876 | { |
| 6877 | if (s->size != 0) |
| 6878 | { |
| 6879 | /* Remember whether there are any reloc sections other |
| 6880 | than .rel(a).plt and .rela.plt.unloaded. */ |
| 6881 | if (s != htab->srelplt && s != htab->srelplt2) |
| 6882 | relocs = TRUE; |
| 6883 | |
| 6884 | /* We use the reloc_count field as a counter if we need |
| 6885 | to copy relocs into the output file. */ |
| 6886 | s->reloc_count = 0; |
| 6887 | } |
| 6888 | } |
| 6889 | else if (strncmp (name, ".got", 4) != 0 |
| 6890 | && strcmp (name, ".dynbss") != 0) |
| 6891 | { |
| 6892 | /* It's not one of our sections, so don't allocate space. */ |
| 6893 | continue; |
| 6894 | } |
| 6895 | |
| 6896 | if (s->size == 0) |
| 6897 | { |
| 6898 | /* If we don't need this section, strip it from the |
| 6899 | output file. This is mostly to handle .rel(a).bss and |
| 6900 | .rel(a).plt. We must create both sections in |
| 6901 | create_dynamic_sections, because they must be created |
| 6902 | before the linker maps input sections to output |
| 6903 | sections. The linker does that before |
| 6904 | adjust_dynamic_symbol is called, and it is that |
| 6905 | function which decides whether anything needs to go |
| 6906 | into these sections. */ |
| 6907 | s->flags |= SEC_EXCLUDE; |
| 6908 | continue; |
| 6909 | } |
| 6910 | |
| 6911 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 6912 | continue; |
| 6913 | |
| 6914 | /* Allocate memory for the section contents. */ |
| 6915 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 6916 | if (s->contents == NULL) |
| 6917 | return FALSE; |
| 6918 | } |
| 6919 | |
| 6920 | if (elf_hash_table (info)->dynamic_sections_created) |
| 6921 | { |
| 6922 | /* Add some entries to the .dynamic section. We fill in the |
| 6923 | values later, in elf32_arm_finish_dynamic_sections, but we |
| 6924 | must add the entries now so that we get the correct size for |
| 6925 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 6926 | dynamic linker and used by the debugger. */ |
| 6927 | #define add_dynamic_entry(TAG, VAL) \ |
| 6928 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 6929 | |
| 6930 | if (info->executable) |
| 6931 | { |
| 6932 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 6933 | return FALSE; |
| 6934 | } |
| 6935 | |
| 6936 | if (plt) |
| 6937 | { |
| 6938 | if ( !add_dynamic_entry (DT_PLTGOT, 0) |
| 6939 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 6940 | || !add_dynamic_entry (DT_PLTREL, |
| 6941 | htab->use_rel ? DT_REL : DT_RELA) |
| 6942 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 6943 | return FALSE; |
| 6944 | } |
| 6945 | |
| 6946 | if (relocs) |
| 6947 | { |
| 6948 | if (htab->use_rel) |
| 6949 | { |
| 6950 | if (!add_dynamic_entry (DT_REL, 0) |
| 6951 | || !add_dynamic_entry (DT_RELSZ, 0) |
| 6952 | || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab))) |
| 6953 | return FALSE; |
| 6954 | } |
| 6955 | else |
| 6956 | { |
| 6957 | if (!add_dynamic_entry (DT_RELA, 0) |
| 6958 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 6959 | || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab))) |
| 6960 | return FALSE; |
| 6961 | } |
| 6962 | } |
| 6963 | |
| 6964 | /* If any dynamic relocs apply to a read-only section, |
| 6965 | then we need a DT_TEXTREL entry. */ |
| 6966 | if ((info->flags & DF_TEXTREL) == 0) |
| 6967 | elf_link_hash_traverse (&htab->root, elf32_arm_readonly_dynrelocs, |
| 6968 | (PTR) info); |
| 6969 | |
| 6970 | if ((info->flags & DF_TEXTREL) != 0) |
| 6971 | { |
| 6972 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 6973 | return FALSE; |
| 6974 | } |
| 6975 | } |
| 6976 | #undef add_dynamic_entry |
| 6977 | |
| 6978 | return TRUE; |
| 6979 | } |
| 6980 | |
| 6981 | /* Finish up dynamic symbol handling. We set the contents of various |
| 6982 | dynamic sections here. */ |
| 6983 | |
| 6984 | static bfd_boolean |
| 6985 | elf32_arm_finish_dynamic_symbol (bfd * output_bfd, struct bfd_link_info * info, |
| 6986 | struct elf_link_hash_entry * h, Elf_Internal_Sym * sym) |
| 6987 | { |
| 6988 | bfd * dynobj; |
| 6989 | struct elf32_arm_link_hash_table *htab; |
| 6990 | struct elf32_arm_link_hash_entry *eh; |
| 6991 | |
| 6992 | dynobj = elf_hash_table (info)->dynobj; |
| 6993 | htab = elf32_arm_hash_table (info); |
| 6994 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 6995 | |
| 6996 | if (h->plt.offset != (bfd_vma) -1) |
| 6997 | { |
| 6998 | asection * splt; |
| 6999 | asection * srel; |
| 7000 | bfd_byte *loc; |
| 7001 | bfd_vma plt_index; |
| 7002 | Elf_Internal_Rela rel; |
| 7003 | |
| 7004 | /* This symbol has an entry in the procedure linkage table. Set |
| 7005 | it up. */ |
| 7006 | |
| 7007 | BFD_ASSERT (h->dynindx != -1); |
| 7008 | |
| 7009 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 7010 | srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt")); |
| 7011 | BFD_ASSERT (splt != NULL && srel != NULL); |
| 7012 | |
| 7013 | /* Fill in the entry in the procedure linkage table. */ |
| 7014 | if (htab->symbian_p) |
| 7015 | { |
| 7016 | put_arm_insn (htab, output_bfd, |
| 7017 | elf32_arm_symbian_plt_entry[0], |
| 7018 | splt->contents + h->plt.offset); |
| 7019 | bfd_put_32 (output_bfd, |
| 7020 | elf32_arm_symbian_plt_entry[1], |
| 7021 | splt->contents + h->plt.offset + 4); |
| 7022 | |
| 7023 | /* Fill in the entry in the .rel.plt section. */ |
| 7024 | rel.r_offset = (splt->output_section->vma |
| 7025 | + splt->output_offset |
| 7026 | + h->plt.offset + 4); |
| 7027 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); |
| 7028 | |
| 7029 | /* Get the index in the procedure linkage table which |
| 7030 | corresponds to this symbol. This is the index of this symbol |
| 7031 | in all the symbols for which we are making plt entries. The |
| 7032 | first entry in the procedure linkage table is reserved. */ |
| 7033 | plt_index = ((h->plt.offset - htab->plt_header_size) |
| 7034 | / htab->plt_entry_size); |
| 7035 | } |
| 7036 | else |
| 7037 | { |
| 7038 | bfd_vma got_offset, got_address, plt_address; |
| 7039 | bfd_vma got_displacement; |
| 7040 | asection * sgot; |
| 7041 | bfd_byte * ptr; |
| 7042 | |
| 7043 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 7044 | BFD_ASSERT (sgot != NULL); |
| 7045 | |
| 7046 | /* Get the offset into the .got.plt table of the entry that |
| 7047 | corresponds to this function. */ |
| 7048 | got_offset = eh->plt_got_offset; |
| 7049 | |
| 7050 | /* Get the index in the procedure linkage table which |
| 7051 | corresponds to this symbol. This is the index of this symbol |
| 7052 | in all the symbols for which we are making plt entries. The |
| 7053 | first three entries in .got.plt are reserved; after that |
| 7054 | symbols appear in the same order as in .plt. */ |
| 7055 | plt_index = (got_offset - 12) / 4; |
| 7056 | |
| 7057 | /* Calculate the address of the GOT entry. */ |
| 7058 | got_address = (sgot->output_section->vma |
| 7059 | + sgot->output_offset |
| 7060 | + got_offset); |
| 7061 | |
| 7062 | /* ...and the address of the PLT entry. */ |
| 7063 | plt_address = (splt->output_section->vma |
| 7064 | + splt->output_offset |
| 7065 | + h->plt.offset); |
| 7066 | |
| 7067 | ptr = htab->splt->contents + h->plt.offset; |
| 7068 | if (htab->vxworks_p && info->shared) |
| 7069 | { |
| 7070 | unsigned int i; |
| 7071 | bfd_vma val; |
| 7072 | |
| 7073 | for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4) |
| 7074 | { |
| 7075 | val = elf32_arm_vxworks_shared_plt_entry[i]; |
| 7076 | if (i == 2) |
| 7077 | val |= got_address - sgot->output_section->vma; |
| 7078 | if (i == 5) |
| 7079 | val |= plt_index * RELOC_SIZE (htab); |
| 7080 | if (i == 2 || i == 5) |
| 7081 | bfd_put_32 (output_bfd, val, ptr); |
| 7082 | else |
| 7083 | put_arm_insn (htab, output_bfd, val, ptr); |
| 7084 | } |
| 7085 | } |
| 7086 | else if (htab->vxworks_p) |
| 7087 | { |
| 7088 | unsigned int i; |
| 7089 | bfd_vma val; |
| 7090 | |
| 7091 | for (i = 0; i != htab->plt_entry_size / 4; i++) |
| 7092 | { |
| 7093 | val = elf32_arm_vxworks_exec_plt_entry[i]; |
| 7094 | if (i == 2) |
| 7095 | val |= got_address; |
| 7096 | if (i == 4) |
| 7097 | val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2); |
| 7098 | if (i == 5) |
| 7099 | val |= plt_index * RELOC_SIZE (htab); |
| 7100 | if (i == 2 || i == 5) |
| 7101 | bfd_put_32 (output_bfd, val, ptr); |
| 7102 | else |
| 7103 | put_arm_insn (htab, output_bfd, val, ptr); |
| 7104 | } |
| 7105 | |
| 7106 | loc = (htab->srelplt2->contents |
| 7107 | + (plt_index * 2 + 1) * RELOC_SIZE (htab)); |
| 7108 | |
| 7109 | /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation |
| 7110 | referencing the GOT for this PLT entry. */ |
| 7111 | rel.r_offset = plt_address + 8; |
| 7112 | rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); |
| 7113 | rel.r_addend = got_offset; |
| 7114 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); |
| 7115 | loc += RELOC_SIZE (htab); |
| 7116 | |
| 7117 | /* Create the R_ARM_ABS32 relocation referencing the |
| 7118 | beginning of the PLT for this GOT entry. */ |
| 7119 | rel.r_offset = got_address; |
| 7120 | rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32); |
| 7121 | rel.r_addend = 0; |
| 7122 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); |
| 7123 | } |
| 7124 | else |
| 7125 | { |
| 7126 | /* Calculate the displacement between the PLT slot and the |
| 7127 | entry in the GOT. The eight-byte offset accounts for the |
| 7128 | value produced by adding to pc in the first instruction |
| 7129 | of the PLT stub. */ |
| 7130 | got_displacement = got_address - (plt_address + 8); |
| 7131 | |
| 7132 | BFD_ASSERT ((got_displacement & 0xf0000000) == 0); |
| 7133 | |
| 7134 | if (!htab->use_blx && eh->plt_thumb_refcount > 0) |
| 7135 | { |
| 7136 | put_thumb_insn (htab, output_bfd, |
| 7137 | elf32_arm_plt_thumb_stub[0], ptr - 4); |
| 7138 | put_thumb_insn (htab, output_bfd, |
| 7139 | elf32_arm_plt_thumb_stub[1], ptr - 2); |
| 7140 | } |
| 7141 | |
| 7142 | put_arm_insn (htab, output_bfd, |
| 7143 | elf32_arm_plt_entry[0] |
| 7144 | | ((got_displacement & 0x0ff00000) >> 20), |
| 7145 | ptr + 0); |
| 7146 | put_arm_insn (htab, output_bfd, |
| 7147 | elf32_arm_plt_entry[1] |
| 7148 | | ((got_displacement & 0x000ff000) >> 12), |
| 7149 | ptr+ 4); |
| 7150 | put_arm_insn (htab, output_bfd, |
| 7151 | elf32_arm_plt_entry[2] |
| 7152 | | (got_displacement & 0x00000fff), |
| 7153 | ptr + 8); |
| 7154 | #ifdef FOUR_WORD_PLT |
| 7155 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12); |
| 7156 | #endif |
| 7157 | } |
| 7158 | |
| 7159 | /* Fill in the entry in the global offset table. */ |
| 7160 | bfd_put_32 (output_bfd, |
| 7161 | (splt->output_section->vma |
| 7162 | + splt->output_offset), |
| 7163 | sgot->contents + got_offset); |
| 7164 | |
| 7165 | /* Fill in the entry in the .rel(a).plt section. */ |
| 7166 | rel.r_addend = 0; |
| 7167 | rel.r_offset = got_address; |
| 7168 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); |
| 7169 | } |
| 7170 | |
| 7171 | loc = srel->contents + plt_index * RELOC_SIZE (htab); |
| 7172 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); |
| 7173 | |
| 7174 | if (!h->def_regular) |
| 7175 | { |
| 7176 | /* Mark the symbol as undefined, rather than as defined in |
| 7177 | the .plt section. Leave the value alone. */ |
| 7178 | sym->st_shndx = SHN_UNDEF; |
| 7179 | /* If the symbol is weak, we do need to clear the value. |
| 7180 | Otherwise, the PLT entry would provide a definition for |
| 7181 | the symbol even if the symbol wasn't defined anywhere, |
| 7182 | and so the symbol would never be NULL. */ |
| 7183 | if (!h->ref_regular_nonweak) |
| 7184 | sym->st_value = 0; |
| 7185 | } |
| 7186 | } |
| 7187 | |
| 7188 | if (h->got.offset != (bfd_vma) -1 |
| 7189 | && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0 |
| 7190 | && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0) |
| 7191 | { |
| 7192 | asection * sgot; |
| 7193 | asection * srel; |
| 7194 | Elf_Internal_Rela rel; |
| 7195 | bfd_byte *loc; |
| 7196 | bfd_vma offset; |
| 7197 | |
| 7198 | /* This symbol has an entry in the global offset table. Set it |
| 7199 | up. */ |
| 7200 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 7201 | srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got")); |
| 7202 | BFD_ASSERT (sgot != NULL && srel != NULL); |
| 7203 | |
| 7204 | offset = (h->got.offset & ~(bfd_vma) 1); |
| 7205 | rel.r_addend = 0; |
| 7206 | rel.r_offset = (sgot->output_section->vma |
| 7207 | + sgot->output_offset |
| 7208 | + offset); |
| 7209 | |
| 7210 | /* If this is a static link, or it is a -Bsymbolic link and the |
| 7211 | symbol is defined locally or was forced to be local because |
| 7212 | of a version file, we just want to emit a RELATIVE reloc. |
| 7213 | The entry in the global offset table will already have been |
| 7214 | initialized in the relocate_section function. */ |
| 7215 | if (info->shared |
| 7216 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 7217 | { |
| 7218 | BFD_ASSERT((h->got.offset & 1) != 0); |
| 7219 | rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); |
| 7220 | if (!htab->use_rel) |
| 7221 | { |
| 7222 | rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset); |
| 7223 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); |
| 7224 | } |
| 7225 | } |
| 7226 | else |
| 7227 | { |
| 7228 | BFD_ASSERT((h->got.offset & 1) == 0); |
| 7229 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); |
| 7230 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); |
| 7231 | } |
| 7232 | |
| 7233 | loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab); |
| 7234 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); |
| 7235 | } |
| 7236 | |
| 7237 | if (h->needs_copy) |
| 7238 | { |
| 7239 | asection * s; |
| 7240 | Elf_Internal_Rela rel; |
| 7241 | bfd_byte *loc; |
| 7242 | |
| 7243 | /* This symbol needs a copy reloc. Set it up. */ |
| 7244 | BFD_ASSERT (h->dynindx != -1 |
| 7245 | && (h->root.type == bfd_link_hash_defined |
| 7246 | || h->root.type == bfd_link_hash_defweak)); |
| 7247 | |
| 7248 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 7249 | RELOC_SECTION (htab, ".bss")); |
| 7250 | BFD_ASSERT (s != NULL); |
| 7251 | |
| 7252 | rel.r_addend = 0; |
| 7253 | rel.r_offset = (h->root.u.def.value |
| 7254 | + h->root.u.def.section->output_section->vma |
| 7255 | + h->root.u.def.section->output_offset); |
| 7256 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY); |
| 7257 | loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab); |
| 7258 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); |
| 7259 | } |
| 7260 | |
| 7261 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks, |
| 7262 | the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative |
| 7263 | to the ".got" section. */ |
| 7264 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 7265 | || (!htab->vxworks_p && h == htab->root.hgot)) |
| 7266 | sym->st_shndx = SHN_ABS; |
| 7267 | |
| 7268 | return TRUE; |
| 7269 | } |
| 7270 | |
| 7271 | /* Finish up the dynamic sections. */ |
| 7272 | |
| 7273 | static bfd_boolean |
| 7274 | elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info) |
| 7275 | { |
| 7276 | bfd * dynobj; |
| 7277 | asection * sgot; |
| 7278 | asection * sdyn; |
| 7279 | |
| 7280 | dynobj = elf_hash_table (info)->dynobj; |
| 7281 | |
| 7282 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 7283 | BFD_ASSERT (elf32_arm_hash_table (info)->symbian_p || sgot != NULL); |
| 7284 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 7285 | |
| 7286 | if (elf_hash_table (info)->dynamic_sections_created) |
| 7287 | { |
| 7288 | asection *splt; |
| 7289 | Elf32_External_Dyn *dyncon, *dynconend; |
| 7290 | struct elf32_arm_link_hash_table *htab; |
| 7291 | |
| 7292 | htab = elf32_arm_hash_table (info); |
| 7293 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 7294 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 7295 | |
| 7296 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 7297 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 7298 | |
| 7299 | for (; dyncon < dynconend; dyncon++) |
| 7300 | { |
| 7301 | Elf_Internal_Dyn dyn; |
| 7302 | const char * name; |
| 7303 | asection * s; |
| 7304 | |
| 7305 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 7306 | |
| 7307 | switch (dyn.d_tag) |
| 7308 | { |
| 7309 | unsigned int type; |
| 7310 | |
| 7311 | default: |
| 7312 | break; |
| 7313 | |
| 7314 | case DT_HASH: |
| 7315 | name = ".hash"; |
| 7316 | goto get_vma_if_bpabi; |
| 7317 | case DT_STRTAB: |
| 7318 | name = ".dynstr"; |
| 7319 | goto get_vma_if_bpabi; |
| 7320 | case DT_SYMTAB: |
| 7321 | name = ".dynsym"; |
| 7322 | goto get_vma_if_bpabi; |
| 7323 | case DT_VERSYM: |
| 7324 | name = ".gnu.version"; |
| 7325 | goto get_vma_if_bpabi; |
| 7326 | case DT_VERDEF: |
| 7327 | name = ".gnu.version_d"; |
| 7328 | goto get_vma_if_bpabi; |
| 7329 | case DT_VERNEED: |
| 7330 | name = ".gnu.version_r"; |
| 7331 | goto get_vma_if_bpabi; |
| 7332 | |
| 7333 | case DT_PLTGOT: |
| 7334 | name = ".got"; |
| 7335 | goto get_vma; |
| 7336 | case DT_JMPREL: |
| 7337 | name = RELOC_SECTION (htab, ".plt"); |
| 7338 | get_vma: |
| 7339 | s = bfd_get_section_by_name (output_bfd, name); |
| 7340 | BFD_ASSERT (s != NULL); |
| 7341 | if (!htab->symbian_p) |
| 7342 | dyn.d_un.d_ptr = s->vma; |
| 7343 | else |
| 7344 | /* In the BPABI, tags in the PT_DYNAMIC section point |
| 7345 | at the file offset, not the memory address, for the |
| 7346 | convenience of the post linker. */ |
| 7347 | dyn.d_un.d_ptr = s->filepos; |
| 7348 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 7349 | break; |
| 7350 | |
| 7351 | get_vma_if_bpabi: |
| 7352 | if (htab->symbian_p) |
| 7353 | goto get_vma; |
| 7354 | break; |
| 7355 | |
| 7356 | case DT_PLTRELSZ: |
| 7357 | s = bfd_get_section_by_name (output_bfd, |
| 7358 | RELOC_SECTION (htab, ".plt")); |
| 7359 | BFD_ASSERT (s != NULL); |
| 7360 | dyn.d_un.d_val = s->size; |
| 7361 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 7362 | break; |
| 7363 | |
| 7364 | case DT_RELSZ: |
| 7365 | case DT_RELASZ: |
| 7366 | if (!htab->symbian_p) |
| 7367 | { |
| 7368 | /* My reading of the SVR4 ABI indicates that the |
| 7369 | procedure linkage table relocs (DT_JMPREL) should be |
| 7370 | included in the overall relocs (DT_REL). This is |
| 7371 | what Solaris does. However, UnixWare can not handle |
| 7372 | that case. Therefore, we override the DT_RELSZ entry |
| 7373 | here to make it not include the JMPREL relocs. Since |
| 7374 | the linker script arranges for .rel(a).plt to follow all |
| 7375 | other relocation sections, we don't have to worry |
| 7376 | about changing the DT_REL entry. */ |
| 7377 | s = bfd_get_section_by_name (output_bfd, |
| 7378 | RELOC_SECTION (htab, ".plt")); |
| 7379 | if (s != NULL) |
| 7380 | dyn.d_un.d_val -= s->size; |
| 7381 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 7382 | break; |
| 7383 | } |
| 7384 | /* Fall through */ |
| 7385 | |
| 7386 | case DT_REL: |
| 7387 | case DT_RELA: |
| 7388 | /* In the BPABI, the DT_REL tag must point at the file |
| 7389 | offset, not the VMA, of the first relocation |
| 7390 | section. So, we use code similar to that in |
| 7391 | elflink.c, but do not check for SHF_ALLOC on the |
| 7392 | relcoation section, since relocations sections are |
| 7393 | never allocated under the BPABI. The comments above |
| 7394 | about Unixware notwithstanding, we include all of the |
| 7395 | relocations here. */ |
| 7396 | if (htab->symbian_p) |
| 7397 | { |
| 7398 | unsigned int i; |
| 7399 | type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) |
| 7400 | ? SHT_REL : SHT_RELA); |
| 7401 | dyn.d_un.d_val = 0; |
| 7402 | for (i = 1; i < elf_numsections (output_bfd); i++) |
| 7403 | { |
| 7404 | Elf_Internal_Shdr *hdr |
| 7405 | = elf_elfsections (output_bfd)[i]; |
| 7406 | if (hdr->sh_type == type) |
| 7407 | { |
| 7408 | if (dyn.d_tag == DT_RELSZ |
| 7409 | || dyn.d_tag == DT_RELASZ) |
| 7410 | dyn.d_un.d_val += hdr->sh_size; |
| 7411 | else if ((ufile_ptr) hdr->sh_offset |
| 7412 | <= dyn.d_un.d_val - 1) |
| 7413 | dyn.d_un.d_val = hdr->sh_offset; |
| 7414 | } |
| 7415 | } |
| 7416 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 7417 | } |
| 7418 | break; |
| 7419 | |
| 7420 | /* Set the bottom bit of DT_INIT/FINI if the |
| 7421 | corresponding function is Thumb. */ |
| 7422 | case DT_INIT: |
| 7423 | name = info->init_function; |
| 7424 | goto get_sym; |
| 7425 | case DT_FINI: |
| 7426 | name = info->fini_function; |
| 7427 | get_sym: |
| 7428 | /* If it wasn't set by elf_bfd_final_link |
| 7429 | then there is nothing to adjust. */ |
| 7430 | if (dyn.d_un.d_val != 0) |
| 7431 | { |
| 7432 | struct elf_link_hash_entry * eh; |
| 7433 | |
| 7434 | eh = elf_link_hash_lookup (elf_hash_table (info), name, |
| 7435 | FALSE, FALSE, TRUE); |
| 7436 | if (eh != (struct elf_link_hash_entry *) NULL |
| 7437 | && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC) |
| 7438 | { |
| 7439 | dyn.d_un.d_val |= 1; |
| 7440 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 7441 | } |
| 7442 | } |
| 7443 | break; |
| 7444 | } |
| 7445 | } |
| 7446 | |
| 7447 | /* Fill in the first entry in the procedure linkage table. */ |
| 7448 | if (splt->size > 0 && elf32_arm_hash_table (info)->plt_header_size) |
| 7449 | { |
| 7450 | const bfd_vma *plt0_entry; |
| 7451 | bfd_vma got_address, plt_address, got_displacement; |
| 7452 | |
| 7453 | /* Calculate the addresses of the GOT and PLT. */ |
| 7454 | got_address = sgot->output_section->vma + sgot->output_offset; |
| 7455 | plt_address = splt->output_section->vma + splt->output_offset; |
| 7456 | |
| 7457 | if (htab->vxworks_p) |
| 7458 | { |
| 7459 | /* The VxWorks GOT is relocated by the dynamic linker. |
| 7460 | Therefore, we must emit relocations rather than simply |
| 7461 | computing the values now. */ |
| 7462 | Elf_Internal_Rela rel; |
| 7463 | |
| 7464 | plt0_entry = elf32_arm_vxworks_exec_plt0_entry; |
| 7465 | put_arm_insn (htab, output_bfd, plt0_entry[0], |
| 7466 | splt->contents + 0); |
| 7467 | put_arm_insn (htab, output_bfd, plt0_entry[1], |
| 7468 | splt->contents + 4); |
| 7469 | put_arm_insn (htab, output_bfd, plt0_entry[2], |
| 7470 | splt->contents + 8); |
| 7471 | bfd_put_32 (output_bfd, got_address, splt->contents + 12); |
| 7472 | |
| 7473 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */ |
| 7474 | rel.r_offset = plt_address + 12; |
| 7475 | rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); |
| 7476 | rel.r_addend = 0; |
| 7477 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, |
| 7478 | htab->srelplt2->contents); |
| 7479 | } |
| 7480 | else |
| 7481 | { |
| 7482 | got_displacement = got_address - (plt_address + 16); |
| 7483 | |
| 7484 | plt0_entry = elf32_arm_plt0_entry; |
| 7485 | put_arm_insn (htab, output_bfd, plt0_entry[0], |
| 7486 | splt->contents + 0); |
| 7487 | put_arm_insn (htab, output_bfd, plt0_entry[1], |
| 7488 | splt->contents + 4); |
| 7489 | put_arm_insn (htab, output_bfd, plt0_entry[2], |
| 7490 | splt->contents + 8); |
| 7491 | put_arm_insn (htab, output_bfd, plt0_entry[3], |
| 7492 | splt->contents + 12); |
| 7493 | |
| 7494 | #ifdef FOUR_WORD_PLT |
| 7495 | /* The displacement value goes in the otherwise-unused |
| 7496 | last word of the second entry. */ |
| 7497 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 28); |
| 7498 | #else |
| 7499 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 16); |
| 7500 | #endif |
| 7501 | } |
| 7502 | } |
| 7503 | |
| 7504 | /* UnixWare sets the entsize of .plt to 4, although that doesn't |
| 7505 | really seem like the right value. */ |
| 7506 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; |
| 7507 | |
| 7508 | if (htab->vxworks_p && !info->shared && htab->splt->size > 0) |
| 7509 | { |
| 7510 | /* Correct the .rel(a).plt.unloaded relocations. They will have |
| 7511 | incorrect symbol indexes. */ |
| 7512 | int num_plts; |
| 7513 | unsigned char *p; |
| 7514 | |
| 7515 | num_plts = ((htab->splt->size - htab->plt_header_size) |
| 7516 | / htab->plt_entry_size); |
| 7517 | p = htab->srelplt2->contents + RELOC_SIZE (htab); |
| 7518 | |
| 7519 | for (; num_plts; num_plts--) |
| 7520 | { |
| 7521 | Elf_Internal_Rela rel; |
| 7522 | |
| 7523 | SWAP_RELOC_IN (htab) (output_bfd, p, &rel); |
| 7524 | rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); |
| 7525 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, p); |
| 7526 | p += RELOC_SIZE (htab); |
| 7527 | |
| 7528 | SWAP_RELOC_IN (htab) (output_bfd, p, &rel); |
| 7529 | rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32); |
| 7530 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, p); |
| 7531 | p += RELOC_SIZE (htab); |
| 7532 | } |
| 7533 | } |
| 7534 | } |
| 7535 | |
| 7536 | /* Fill in the first three entries in the global offset table. */ |
| 7537 | if (sgot) |
| 7538 | { |
| 7539 | if (sgot->size > 0) |
| 7540 | { |
| 7541 | if (sdyn == NULL) |
| 7542 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 7543 | else |
| 7544 | bfd_put_32 (output_bfd, |
| 7545 | sdyn->output_section->vma + sdyn->output_offset, |
| 7546 | sgot->contents); |
| 7547 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
| 7548 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
| 7549 | } |
| 7550 | |
| 7551 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 7552 | } |
| 7553 | |
| 7554 | return TRUE; |
| 7555 | } |
| 7556 | |
| 7557 | static void |
| 7558 | elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED) |
| 7559 | { |
| 7560 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
| 7561 | struct elf32_arm_link_hash_table *globals; |
| 7562 | |
| 7563 | i_ehdrp = elf_elfheader (abfd); |
| 7564 | |
| 7565 | if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN) |
| 7566 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM; |
| 7567 | else |
| 7568 | i_ehdrp->e_ident[EI_OSABI] = 0; |
| 7569 | i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION; |
| 7570 | |
| 7571 | if (link_info) |
| 7572 | { |
| 7573 | globals = elf32_arm_hash_table (link_info); |
| 7574 | if (globals->byteswap_code) |
| 7575 | i_ehdrp->e_flags |= EF_ARM_BE8; |
| 7576 | } |
| 7577 | } |
| 7578 | |
| 7579 | static enum elf_reloc_type_class |
| 7580 | elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela) |
| 7581 | { |
| 7582 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 7583 | { |
| 7584 | case R_ARM_RELATIVE: |
| 7585 | return reloc_class_relative; |
| 7586 | case R_ARM_JUMP_SLOT: |
| 7587 | return reloc_class_plt; |
| 7588 | case R_ARM_COPY: |
| 7589 | return reloc_class_copy; |
| 7590 | default: |
| 7591 | return reloc_class_normal; |
| 7592 | } |
| 7593 | } |
| 7594 | |
| 7595 | /* Set the right machine number for an Arm ELF file. */ |
| 7596 | |
| 7597 | static bfd_boolean |
| 7598 | elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) |
| 7599 | { |
| 7600 | if (hdr->sh_type == SHT_NOTE) |
| 7601 | *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; |
| 7602 | |
| 7603 | return TRUE; |
| 7604 | } |
| 7605 | |
| 7606 | static void |
| 7607 | elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) |
| 7608 | { |
| 7609 | bfd_arm_update_notes (abfd, ARM_NOTE_SECTION); |
| 7610 | } |
| 7611 | |
| 7612 | /* Return TRUE if this is an unwinding table entry. */ |
| 7613 | |
| 7614 | static bfd_boolean |
| 7615 | is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name) |
| 7616 | { |
| 7617 | size_t len1, len2; |
| 7618 | |
| 7619 | len1 = sizeof (ELF_STRING_ARM_unwind) - 1; |
| 7620 | len2 = sizeof (ELF_STRING_ARM_unwind_once) - 1; |
| 7621 | return (strncmp (name, ELF_STRING_ARM_unwind, len1) == 0 |
| 7622 | || strncmp (name, ELF_STRING_ARM_unwind_once, len2) == 0); |
| 7623 | } |
| 7624 | |
| 7625 | |
| 7626 | /* Set the type and flags for an ARM section. We do this by |
| 7627 | the section name, which is a hack, but ought to work. */ |
| 7628 | |
| 7629 | static bfd_boolean |
| 7630 | elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec) |
| 7631 | { |
| 7632 | const char * name; |
| 7633 | |
| 7634 | name = bfd_get_section_name (abfd, sec); |
| 7635 | |
| 7636 | if (is_arm_elf_unwind_section_name (abfd, name)) |
| 7637 | { |
| 7638 | hdr->sh_type = SHT_ARM_EXIDX; |
| 7639 | hdr->sh_flags |= SHF_LINK_ORDER; |
| 7640 | } |
| 7641 | else if (strcmp(name, ".ARM.attributes") == 0) |
| 7642 | { |
| 7643 | hdr->sh_type = SHT_ARM_ATTRIBUTES; |
| 7644 | } |
| 7645 | return TRUE; |
| 7646 | } |
| 7647 | |
| 7648 | /* Parse an Arm EABI attributes section. */ |
| 7649 | static void |
| 7650 | elf32_arm_parse_attributes (bfd *abfd, Elf_Internal_Shdr * hdr) |
| 7651 | { |
| 7652 | bfd_byte *contents; |
| 7653 | bfd_byte *p; |
| 7654 | bfd_vma len; |
| 7655 | |
| 7656 | contents = bfd_malloc (hdr->sh_size); |
| 7657 | if (!contents) |
| 7658 | return; |
| 7659 | if (!bfd_get_section_contents (abfd, hdr->bfd_section, contents, 0, |
| 7660 | hdr->sh_size)) |
| 7661 | { |
| 7662 | free (contents); |
| 7663 | return; |
| 7664 | } |
| 7665 | p = contents; |
| 7666 | if (*(p++) == 'A') |
| 7667 | { |
| 7668 | len = hdr->sh_size - 1; |
| 7669 | while (len > 0) |
| 7670 | { |
| 7671 | int namelen; |
| 7672 | bfd_vma section_len; |
| 7673 | |
| 7674 | section_len = bfd_get_32 (abfd, p); |
| 7675 | p += 4; |
| 7676 | if (section_len > len) |
| 7677 | section_len = len; |
| 7678 | len -= section_len; |
| 7679 | namelen = strlen ((char *)p) + 1; |
| 7680 | section_len -= namelen + 4; |
| 7681 | if (strcmp((char *)p, "aeabi") != 0) |
| 7682 | { |
| 7683 | /* Vendor section. Ignore it. */ |
| 7684 | p += namelen + section_len; |
| 7685 | } |
| 7686 | else |
| 7687 | { |
| 7688 | p += namelen; |
| 7689 | while (section_len > 0) |
| 7690 | { |
| 7691 | int tag; |
| 7692 | unsigned int n; |
| 7693 | unsigned int val; |
| 7694 | bfd_vma subsection_len; |
| 7695 | bfd_byte *end; |
| 7696 | |
| 7697 | tag = read_unsigned_leb128 (abfd, p, &n); |
| 7698 | p += n; |
| 7699 | subsection_len = bfd_get_32 (abfd, p); |
| 7700 | p += 4; |
| 7701 | if (subsection_len > section_len) |
| 7702 | subsection_len = section_len; |
| 7703 | section_len -= subsection_len; |
| 7704 | subsection_len -= n + 4; |
| 7705 | end = p + subsection_len; |
| 7706 | switch (tag) |
| 7707 | { |
| 7708 | case Tag_File: |
| 7709 | while (p < end) |
| 7710 | { |
| 7711 | bfd_boolean is_string; |
| 7712 | |
| 7713 | tag = read_unsigned_leb128 (abfd, p, &n); |
| 7714 | p += n; |
| 7715 | if (tag == 4 || tag == 5) |
| 7716 | is_string = 1; |
| 7717 | else if (tag < 32) |
| 7718 | is_string = 0; |
| 7719 | else |
| 7720 | is_string = (tag & 1) != 0; |
| 7721 | if (tag == Tag_compatibility) |
| 7722 | { |
| 7723 | val = read_unsigned_leb128 (abfd, p, &n); |
| 7724 | p += n; |
| 7725 | elf32_arm_add_eabi_attr_compat (abfd, val, |
| 7726 | (char *)p); |
| 7727 | p += strlen ((char *)p) + 1; |
| 7728 | } |
| 7729 | else if (is_string) |
| 7730 | { |
| 7731 | elf32_arm_add_eabi_attr_string (abfd, tag, |
| 7732 | (char *)p); |
| 7733 | p += strlen ((char *)p) + 1; |
| 7734 | } |
| 7735 | else |
| 7736 | { |
| 7737 | val = read_unsigned_leb128 (abfd, p, &n); |
| 7738 | p += n; |
| 7739 | elf32_arm_add_eabi_attr_int (abfd, tag, val); |
| 7740 | } |
| 7741 | } |
| 7742 | break; |
| 7743 | case Tag_Section: |
| 7744 | case Tag_Symbol: |
| 7745 | /* Don't have anywhere convenient to attach these. |
| 7746 | Fall through for now. */ |
| 7747 | default: |
| 7748 | /* Ignore things we don't kow about. */ |
| 7749 | p += subsection_len; |
| 7750 | subsection_len = 0; |
| 7751 | break; |
| 7752 | } |
| 7753 | } |
| 7754 | } |
| 7755 | } |
| 7756 | } |
| 7757 | free (contents); |
| 7758 | } |
| 7759 | |
| 7760 | /* Handle an ARM specific section when reading an object file. This is |
| 7761 | called when bfd_section_from_shdr finds a section with an unknown |
| 7762 | type. */ |
| 7763 | |
| 7764 | static bfd_boolean |
| 7765 | elf32_arm_section_from_shdr (bfd *abfd, |
| 7766 | Elf_Internal_Shdr * hdr, |
| 7767 | const char *name, |
| 7768 | int shindex) |
| 7769 | { |
| 7770 | /* There ought to be a place to keep ELF backend specific flags, but |
| 7771 | at the moment there isn't one. We just keep track of the |
| 7772 | sections by their name, instead. Fortunately, the ABI gives |
| 7773 | names for all the ARM specific sections, so we will probably get |
| 7774 | away with this. */ |
| 7775 | switch (hdr->sh_type) |
| 7776 | { |
| 7777 | case SHT_ARM_EXIDX: |
| 7778 | case SHT_ARM_PREEMPTMAP: |
| 7779 | case SHT_ARM_ATTRIBUTES: |
| 7780 | break; |
| 7781 | |
| 7782 | default: |
| 7783 | return FALSE; |
| 7784 | } |
| 7785 | |
| 7786 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 7787 | return FALSE; |
| 7788 | |
| 7789 | if (hdr->sh_type == SHT_ARM_ATTRIBUTES) |
| 7790 | elf32_arm_parse_attributes(abfd, hdr); |
| 7791 | return TRUE; |
| 7792 | } |
| 7793 | |
| 7794 | /* A structure used to record a list of sections, independently |
| 7795 | of the next and prev fields in the asection structure. */ |
| 7796 | typedef struct section_list |
| 7797 | { |
| 7798 | asection * sec; |
| 7799 | struct section_list * next; |
| 7800 | struct section_list * prev; |
| 7801 | } |
| 7802 | section_list; |
| 7803 | |
| 7804 | /* Unfortunately we need to keep a list of sections for which |
| 7805 | an _arm_elf_section_data structure has been allocated. This |
| 7806 | is because it is possible for functions like elf32_arm_write_section |
| 7807 | to be called on a section which has had an elf_data_structure |
| 7808 | allocated for it (and so the used_by_bfd field is valid) but |
| 7809 | for which the ARM extended version of this structure - the |
| 7810 | _arm_elf_section_data structure - has not been allocated. */ |
| 7811 | static section_list * sections_with_arm_elf_section_data = NULL; |
| 7812 | |
| 7813 | static void |
| 7814 | record_section_with_arm_elf_section_data (asection * sec) |
| 7815 | { |
| 7816 | struct section_list * entry; |
| 7817 | |
| 7818 | entry = bfd_malloc (sizeof (* entry)); |
| 7819 | if (entry == NULL) |
| 7820 | return; |
| 7821 | entry->sec = sec; |
| 7822 | entry->next = sections_with_arm_elf_section_data; |
| 7823 | entry->prev = NULL; |
| 7824 | if (entry->next != NULL) |
| 7825 | entry->next->prev = entry; |
| 7826 | sections_with_arm_elf_section_data = entry; |
| 7827 | } |
| 7828 | |
| 7829 | static struct section_list * |
| 7830 | find_arm_elf_section_entry (asection * sec) |
| 7831 | { |
| 7832 | struct section_list * entry; |
| 7833 | static struct section_list * last_entry = NULL; |
| 7834 | |
| 7835 | /* This is a short cut for the typical case where the sections are added |
| 7836 | to the sections_with_arm_elf_section_data list in forward order and |
| 7837 | then looked up here in backwards order. This makes a real difference |
| 7838 | to the ld-srec/sec64k.exp linker test. */ |
| 7839 | entry = sections_with_arm_elf_section_data; |
| 7840 | if (last_entry != NULL) |
| 7841 | { |
| 7842 | if (last_entry->sec == sec) |
| 7843 | entry = last_entry; |
| 7844 | else if (last_entry->next != NULL |
| 7845 | && last_entry->next->sec == sec) |
| 7846 | entry = last_entry->next; |
| 7847 | } |
| 7848 | |
| 7849 | for (; entry; entry = entry->next) |
| 7850 | if (entry->sec == sec) |
| 7851 | break; |
| 7852 | |
| 7853 | if (entry) |
| 7854 | /* Record the entry prior to this one - it is the entry we are most |
| 7855 | likely to want to locate next time. Also this way if we have been |
| 7856 | called from unrecord_section_with_arm_elf_section_data() we will not |
| 7857 | be caching a pointer that is about to be freed. */ |
| 7858 | last_entry = entry->prev; |
| 7859 | |
| 7860 | return entry; |
| 7861 | } |
| 7862 | |
| 7863 | static _arm_elf_section_data * |
| 7864 | get_arm_elf_section_data (asection * sec) |
| 7865 | { |
| 7866 | struct section_list * entry; |
| 7867 | |
| 7868 | entry = find_arm_elf_section_entry (sec); |
| 7869 | |
| 7870 | if (entry) |
| 7871 | return elf32_arm_section_data (entry->sec); |
| 7872 | else |
| 7873 | return NULL; |
| 7874 | } |
| 7875 | |
| 7876 | static void |
| 7877 | unrecord_section_with_arm_elf_section_data (asection * sec) |
| 7878 | { |
| 7879 | struct section_list * entry; |
| 7880 | |
| 7881 | entry = find_arm_elf_section_entry (sec); |
| 7882 | |
| 7883 | if (entry) |
| 7884 | { |
| 7885 | if (entry->prev != NULL) |
| 7886 | entry->prev->next = entry->next; |
| 7887 | if (entry->next != NULL) |
| 7888 | entry->next->prev = entry->prev; |
| 7889 | if (entry == sections_with_arm_elf_section_data) |
| 7890 | sections_with_arm_elf_section_data = entry->next; |
| 7891 | free (entry); |
| 7892 | } |
| 7893 | } |
| 7894 | |
| 7895 | /* Called for each symbol. Builds a section map based on mapping symbols. |
| 7896 | Does not alter any of the symbols. */ |
| 7897 | |
| 7898 | static bfd_boolean |
| 7899 | elf32_arm_output_symbol_hook (struct bfd_link_info *info, |
| 7900 | const char *name, |
| 7901 | Elf_Internal_Sym *elfsym, |
| 7902 | asection *input_sec, |
| 7903 | struct elf_link_hash_entry *h) |
| 7904 | { |
| 7905 | int mapcount; |
| 7906 | elf32_arm_section_map *map; |
| 7907 | elf32_arm_section_map *newmap; |
| 7908 | _arm_elf_section_data *arm_data; |
| 7909 | struct elf32_arm_link_hash_table *globals; |
| 7910 | |
| 7911 | globals = elf32_arm_hash_table (info); |
| 7912 | if (globals->vxworks_p |
| 7913 | && !elf_vxworks_link_output_symbol_hook (info, name, elfsym, |
| 7914 | input_sec, h)) |
| 7915 | return FALSE; |
| 7916 | |
| 7917 | /* Only do this on final link. */ |
| 7918 | if (info->relocatable) |
| 7919 | return TRUE; |
| 7920 | |
| 7921 | /* Only build a map if we need to byteswap code. */ |
| 7922 | if (!globals->byteswap_code) |
| 7923 | return TRUE; |
| 7924 | |
| 7925 | /* We only want mapping symbols. */ |
| 7926 | if (!bfd_is_arm_special_symbol_name (name, BFD_ARM_SPECIAL_SYM_TYPE_MAP)) |
| 7927 | return TRUE; |
| 7928 | |
| 7929 | /* If this section has not been allocated an _arm_elf_section_data |
| 7930 | structure then we cannot record anything. */ |
| 7931 | arm_data = get_arm_elf_section_data (input_sec); |
| 7932 | if (arm_data == NULL) |
| 7933 | return TRUE; |
| 7934 | |
| 7935 | mapcount = arm_data->mapcount + 1; |
| 7936 | map = arm_data->map; |
| 7937 | |
| 7938 | /* TODO: This may be inefficient, but we probably don't usually have many |
| 7939 | mapping symbols per section. */ |
| 7940 | newmap = bfd_realloc (map, mapcount * sizeof (* map)); |
| 7941 | if (newmap != NULL) |
| 7942 | { |
| 7943 | arm_data->map = newmap; |
| 7944 | arm_data->mapcount = mapcount; |
| 7945 | |
| 7946 | newmap[mapcount - 1].vma = elfsym->st_value; |
| 7947 | newmap[mapcount - 1].type = name[1]; |
| 7948 | } |
| 7949 | |
| 7950 | return TRUE; |
| 7951 | } |
| 7952 | |
| 7953 | typedef struct |
| 7954 | { |
| 7955 | void *finfo; |
| 7956 | struct bfd_link_info *info; |
| 7957 | int plt_shndx; |
| 7958 | bfd_vma plt_offset; |
| 7959 | bfd_boolean (*func) (void *, const char *, Elf_Internal_Sym *, |
| 7960 | asection *, struct elf_link_hash_entry *); |
| 7961 | } output_arch_syminfo; |
| 7962 | |
| 7963 | enum map_symbol_type |
| 7964 | { |
| 7965 | ARM_MAP_ARM, |
| 7966 | ARM_MAP_THUMB, |
| 7967 | ARM_MAP_DATA |
| 7968 | }; |
| 7969 | |
| 7970 | |
| 7971 | /* Output a single PLT mapping symbol. */ |
| 7972 | |
| 7973 | static bfd_boolean |
| 7974 | elf32_arm_ouput_plt_map_sym (output_arch_syminfo *osi, |
| 7975 | enum map_symbol_type type, |
| 7976 | bfd_vma offset) |
| 7977 | { |
| 7978 | static const char *names[3] = {"$a", "$t", "$d"}; |
| 7979 | struct elf32_arm_link_hash_table *htab; |
| 7980 | Elf_Internal_Sym sym; |
| 7981 | |
| 7982 | htab = elf32_arm_hash_table (osi->info); |
| 7983 | sym.st_value = osi->plt_offset + offset; |
| 7984 | sym.st_size = 0; |
| 7985 | sym.st_other = 0; |
| 7986 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); |
| 7987 | sym.st_shndx = osi->plt_shndx; |
| 7988 | if (!osi->func (osi->finfo, names[type], &sym, htab->splt, NULL)) |
| 7989 | return FALSE; |
| 7990 | return TRUE; |
| 7991 | } |
| 7992 | |
| 7993 | |
| 7994 | /* Output mapping symbols for PLT entries associated with H. */ |
| 7995 | |
| 7996 | static bfd_boolean |
| 7997 | elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf) |
| 7998 | { |
| 7999 | output_arch_syminfo *osi = (output_arch_syminfo *) inf; |
| 8000 | struct elf32_arm_link_hash_table *htab; |
| 8001 | struct elf32_arm_link_hash_entry *eh; |
| 8002 | bfd_vma addr; |
| 8003 | |
| 8004 | htab = elf32_arm_hash_table (osi->info); |
| 8005 | |
| 8006 | if (h->root.type == bfd_link_hash_indirect) |
| 8007 | return TRUE; |
| 8008 | |
| 8009 | if (h->root.type == bfd_link_hash_warning) |
| 8010 | /* When warning symbols are created, they **replace** the "real" |
| 8011 | entry in the hash table, thus we never get to see the real |
| 8012 | symbol in a hash traversal. So look at it now. */ |
| 8013 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 8014 | |
| 8015 | if (h->plt.offset == (bfd_vma) -1) |
| 8016 | return TRUE; |
| 8017 | |
| 8018 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 8019 | addr = h->plt.offset; |
| 8020 | if (htab->symbian_p) |
| 8021 | { |
| 8022 | if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr)) |
| 8023 | return FALSE; |
| 8024 | if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 4)) |
| 8025 | return FALSE; |
| 8026 | } |
| 8027 | else if (htab->vxworks_p) |
| 8028 | { |
| 8029 | if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr)) |
| 8030 | return FALSE; |
| 8031 | if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 8)) |
| 8032 | return FALSE; |
| 8033 | if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr + 12)) |
| 8034 | return FALSE; |
| 8035 | if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 20)) |
| 8036 | return FALSE; |
| 8037 | } |
| 8038 | else |
| 8039 | { |
| 8040 | bfd_boolean thumb_stub; |
| 8041 | |
| 8042 | thumb_stub = eh->plt_thumb_refcount > 0 && !htab->use_blx; |
| 8043 | if (thumb_stub) |
| 8044 | { |
| 8045 | if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_THUMB, addr - 4)) |
| 8046 | return FALSE; |
| 8047 | } |
| 8048 | #ifdef FOUR_WORD_PLT |
| 8049 | if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr)) |
| 8050 | return FALSE; |
| 8051 | if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_DATA, addr + 12)) |
| 8052 | return FALSE; |
| 8053 | #else |
| 8054 | /* A three-word PLT with no Thumb thunk contains only Arm code, |
| 8055 | so only need to output a mapping symbol for the first PLT entry and |
| 8056 | entries with thumb thunks. */ |
| 8057 | if (thumb_stub || addr == 20) |
| 8058 | { |
| 8059 | if (!elf32_arm_ouput_plt_map_sym (osi, ARM_MAP_ARM, addr)) |
| 8060 | return FALSE; |
| 8061 | } |
| 8062 | #endif |
| 8063 | } |
| 8064 | |
| 8065 | return TRUE; |
| 8066 | } |
| 8067 | |
| 8068 | |
| 8069 | /* Output mapping symbols for the PLT. */ |
| 8070 | |
| 8071 | static bfd_boolean |
| 8072 | elf32_arm_output_arch_local_syms (bfd *output_bfd, |
| 8073 | struct bfd_link_info *info, |
| 8074 | void *finfo, bfd_boolean (*func) (void *, const char *, |
| 8075 | Elf_Internal_Sym *, |
| 8076 | asection *, |
| 8077 | struct elf_link_hash_entry *)) |
| 8078 | { |
| 8079 | output_arch_syminfo osi; |
| 8080 | struct elf32_arm_link_hash_table *htab; |
| 8081 | |
| 8082 | htab = elf32_arm_hash_table (info); |
| 8083 | if (!htab->splt || htab->splt->size == 0) |
| 8084 | return TRUE; |
| 8085 | |
| 8086 | check_use_blx(htab); |
| 8087 | osi.finfo = finfo; |
| 8088 | osi.info = info; |
| 8089 | osi.func = func; |
| 8090 | osi.plt_shndx = _bfd_elf_section_from_bfd_section (output_bfd, |
| 8091 | htab->splt->output_section); |
| 8092 | osi.plt_offset = htab->splt->output_section->vma; |
| 8093 | |
| 8094 | /* Output mapping symbols for the plt header. SymbianOS does not have a |
| 8095 | plt header. */ |
| 8096 | if (htab->vxworks_p) |
| 8097 | { |
| 8098 | /* VxWorks shared libraries have no PLT header. */ |
| 8099 | if (!info->shared) |
| 8100 | { |
| 8101 | if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0)) |
| 8102 | return FALSE; |
| 8103 | if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 12)) |
| 8104 | return FALSE; |
| 8105 | } |
| 8106 | } |
| 8107 | else if (!htab->symbian_p) |
| 8108 | { |
| 8109 | if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_ARM, 0)) |
| 8110 | return FALSE; |
| 8111 | #ifndef FOUR_WORD_PLT |
| 8112 | if (!elf32_arm_ouput_plt_map_sym (&osi, ARM_MAP_DATA, 16)) |
| 8113 | return FALSE; |
| 8114 | #endif |
| 8115 | } |
| 8116 | |
| 8117 | elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi); |
| 8118 | return TRUE; |
| 8119 | } |
| 8120 | |
| 8121 | /* Allocate target specific section data. */ |
| 8122 | |
| 8123 | static bfd_boolean |
| 8124 | elf32_arm_new_section_hook (bfd *abfd, asection *sec) |
| 8125 | { |
| 8126 | if (!sec->used_by_bfd) |
| 8127 | { |
| 8128 | _arm_elf_section_data *sdata; |
| 8129 | bfd_size_type amt = sizeof (*sdata); |
| 8130 | |
| 8131 | sdata = bfd_zalloc (abfd, amt); |
| 8132 | if (sdata == NULL) |
| 8133 | return FALSE; |
| 8134 | sec->used_by_bfd = sdata; |
| 8135 | } |
| 8136 | |
| 8137 | record_section_with_arm_elf_section_data (sec); |
| 8138 | |
| 8139 | return _bfd_elf_new_section_hook (abfd, sec); |
| 8140 | } |
| 8141 | |
| 8142 | |
| 8143 | /* Used to order a list of mapping symbols by address. */ |
| 8144 | |
| 8145 | static int |
| 8146 | elf32_arm_compare_mapping (const void * a, const void * b) |
| 8147 | { |
| 8148 | return ((const elf32_arm_section_map *) a)->vma |
| 8149 | > ((const elf32_arm_section_map *) b)->vma; |
| 8150 | } |
| 8151 | |
| 8152 | |
| 8153 | /* Do code byteswapping. Return FALSE afterwards so that the section is |
| 8154 | written out as normal. */ |
| 8155 | |
| 8156 | static bfd_boolean |
| 8157 | elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec, |
| 8158 | bfd_byte *contents) |
| 8159 | { |
| 8160 | int mapcount; |
| 8161 | _arm_elf_section_data *arm_data; |
| 8162 | elf32_arm_section_map *map; |
| 8163 | bfd_vma ptr; |
| 8164 | bfd_vma end; |
| 8165 | bfd_vma offset; |
| 8166 | bfd_byte tmp; |
| 8167 | int i; |
| 8168 | |
| 8169 | /* If this section has not been allocated an _arm_elf_section_data |
| 8170 | structure then we cannot record anything. */ |
| 8171 | arm_data = get_arm_elf_section_data (sec); |
| 8172 | if (arm_data == NULL) |
| 8173 | return FALSE; |
| 8174 | |
| 8175 | mapcount = arm_data->mapcount; |
| 8176 | map = arm_data->map; |
| 8177 | |
| 8178 | if (mapcount == 0) |
| 8179 | return FALSE; |
| 8180 | |
| 8181 | qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping); |
| 8182 | |
| 8183 | offset = sec->output_section->vma + sec->output_offset; |
| 8184 | ptr = map[0].vma - offset; |
| 8185 | for (i = 0; i < mapcount; i++) |
| 8186 | { |
| 8187 | if (i == mapcount - 1) |
| 8188 | end = sec->size; |
| 8189 | else |
| 8190 | end = map[i + 1].vma - offset; |
| 8191 | |
| 8192 | switch (map[i].type) |
| 8193 | { |
| 8194 | case 'a': |
| 8195 | /* Byte swap code words. */ |
| 8196 | while (ptr + 3 < end) |
| 8197 | { |
| 8198 | tmp = contents[ptr]; |
| 8199 | contents[ptr] = contents[ptr + 3]; |
| 8200 | contents[ptr + 3] = tmp; |
| 8201 | tmp = contents[ptr + 1]; |
| 8202 | contents[ptr + 1] = contents[ptr + 2]; |
| 8203 | contents[ptr + 2] = tmp; |
| 8204 | ptr += 4; |
| 8205 | } |
| 8206 | break; |
| 8207 | |
| 8208 | case 't': |
| 8209 | /* Byte swap code halfwords. */ |
| 8210 | while (ptr + 1 < end) |
| 8211 | { |
| 8212 | tmp = contents[ptr]; |
| 8213 | contents[ptr] = contents[ptr + 1]; |
| 8214 | contents[ptr + 1] = tmp; |
| 8215 | ptr += 2; |
| 8216 | } |
| 8217 | break; |
| 8218 | |
| 8219 | case 'd': |
| 8220 | /* Leave data alone. */ |
| 8221 | break; |
| 8222 | } |
| 8223 | ptr = end; |
| 8224 | } |
| 8225 | |
| 8226 | free (map); |
| 8227 | arm_data->mapcount = 0; |
| 8228 | arm_data->map = NULL; |
| 8229 | unrecord_section_with_arm_elf_section_data (sec); |
| 8230 | |
| 8231 | return FALSE; |
| 8232 | } |
| 8233 | |
| 8234 | static void |
| 8235 | unrecord_section_via_map_over_sections (bfd * abfd ATTRIBUTE_UNUSED, |
| 8236 | asection * sec, |
| 8237 | void * ignore ATTRIBUTE_UNUSED) |
| 8238 | { |
| 8239 | unrecord_section_with_arm_elf_section_data (sec); |
| 8240 | } |
| 8241 | |
| 8242 | static bfd_boolean |
| 8243 | elf32_arm_close_and_cleanup (bfd * abfd) |
| 8244 | { |
| 8245 | if (abfd->sections) |
| 8246 | bfd_map_over_sections (abfd, |
| 8247 | unrecord_section_via_map_over_sections, |
| 8248 | NULL); |
| 8249 | |
| 8250 | return _bfd_elf_close_and_cleanup (abfd); |
| 8251 | } |
| 8252 | |
| 8253 | static bfd_boolean |
| 8254 | elf32_arm_bfd_free_cached_info (bfd * abfd) |
| 8255 | { |
| 8256 | if (abfd->sections) |
| 8257 | bfd_map_over_sections (abfd, |
| 8258 | unrecord_section_via_map_over_sections, |
| 8259 | NULL); |
| 8260 | |
| 8261 | return _bfd_free_cached_info (abfd); |
| 8262 | } |
| 8263 | |
| 8264 | /* Display STT_ARM_TFUNC symbols as functions. */ |
| 8265 | |
| 8266 | static void |
| 8267 | elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
| 8268 | asymbol *asym) |
| 8269 | { |
| 8270 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; |
| 8271 | |
| 8272 | if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC) |
| 8273 | elfsym->symbol.flags |= BSF_FUNCTION; |
| 8274 | } |
| 8275 | |
| 8276 | |
| 8277 | /* Mangle thumb function symbols as we read them in. */ |
| 8278 | |
| 8279 | static void |
| 8280 | elf32_arm_swap_symbol_in (bfd * abfd, |
| 8281 | const void *psrc, |
| 8282 | const void *pshn, |
| 8283 | Elf_Internal_Sym *dst) |
| 8284 | { |
| 8285 | bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst); |
| 8286 | |
| 8287 | /* New EABI objects mark thumb function symbols by setting the low bit of |
| 8288 | the address. Turn these into STT_ARM_TFUNC. */ |
| 8289 | if (ELF_ST_TYPE (dst->st_info) == STT_FUNC |
| 8290 | && (dst->st_value & 1)) |
| 8291 | { |
| 8292 | dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC); |
| 8293 | dst->st_value &= ~(bfd_vma) 1; |
| 8294 | } |
| 8295 | } |
| 8296 | |
| 8297 | |
| 8298 | /* Mangle thumb function symbols as we write them out. */ |
| 8299 | |
| 8300 | static void |
| 8301 | elf32_arm_swap_symbol_out (bfd *abfd, |
| 8302 | const Elf_Internal_Sym *src, |
| 8303 | void *cdst, |
| 8304 | void *shndx) |
| 8305 | { |
| 8306 | Elf_Internal_Sym newsym; |
| 8307 | |
| 8308 | /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit |
| 8309 | of the address set, as per the new EABI. We do this unconditionally |
| 8310 | because objcopy does not set the elf header flags until after |
| 8311 | it writes out the symbol table. */ |
| 8312 | if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC) |
| 8313 | { |
| 8314 | newsym = *src; |
| 8315 | newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC); |
| 8316 | newsym.st_value |= 1; |
| 8317 | |
| 8318 | src = &newsym; |
| 8319 | } |
| 8320 | bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx); |
| 8321 | } |
| 8322 | |
| 8323 | /* Add the PT_ARM_EXIDX program header. */ |
| 8324 | |
| 8325 | static bfd_boolean |
| 8326 | elf32_arm_modify_segment_map (bfd *abfd, |
| 8327 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 8328 | { |
| 8329 | struct elf_segment_map *m; |
| 8330 | asection *sec; |
| 8331 | |
| 8332 | sec = bfd_get_section_by_name (abfd, ".ARM.exidx"); |
| 8333 | if (sec != NULL && (sec->flags & SEC_LOAD) != 0) |
| 8334 | { |
| 8335 | /* If there is already a PT_ARM_EXIDX header, then we do not |
| 8336 | want to add another one. This situation arises when running |
| 8337 | "strip"; the input binary already has the header. */ |
| 8338 | m = elf_tdata (abfd)->segment_map; |
| 8339 | while (m && m->p_type != PT_ARM_EXIDX) |
| 8340 | m = m->next; |
| 8341 | if (!m) |
| 8342 | { |
| 8343 | m = bfd_zalloc (abfd, sizeof (struct elf_segment_map)); |
| 8344 | if (m == NULL) |
| 8345 | return FALSE; |
| 8346 | m->p_type = PT_ARM_EXIDX; |
| 8347 | m->count = 1; |
| 8348 | m->sections[0] = sec; |
| 8349 | |
| 8350 | m->next = elf_tdata (abfd)->segment_map; |
| 8351 | elf_tdata (abfd)->segment_map = m; |
| 8352 | } |
| 8353 | } |
| 8354 | |
| 8355 | return TRUE; |
| 8356 | } |
| 8357 | |
| 8358 | /* We may add a PT_ARM_EXIDX program header. */ |
| 8359 | |
| 8360 | static int |
| 8361 | elf32_arm_additional_program_headers (bfd *abfd) |
| 8362 | { |
| 8363 | asection *sec; |
| 8364 | |
| 8365 | sec = bfd_get_section_by_name (abfd, ".ARM.exidx"); |
| 8366 | if (sec != NULL && (sec->flags & SEC_LOAD) != 0) |
| 8367 | return 1; |
| 8368 | else |
| 8369 | return 0; |
| 8370 | } |
| 8371 | |
| 8372 | /* We use this to override swap_symbol_in and swap_symbol_out. */ |
| 8373 | const struct elf_size_info elf32_arm_size_info = { |
| 8374 | sizeof (Elf32_External_Ehdr), |
| 8375 | sizeof (Elf32_External_Phdr), |
| 8376 | sizeof (Elf32_External_Shdr), |
| 8377 | sizeof (Elf32_External_Rel), |
| 8378 | sizeof (Elf32_External_Rela), |
| 8379 | sizeof (Elf32_External_Sym), |
| 8380 | sizeof (Elf32_External_Dyn), |
| 8381 | sizeof (Elf_External_Note), |
| 8382 | 4, |
| 8383 | 1, |
| 8384 | 32, 2, |
| 8385 | ELFCLASS32, EV_CURRENT, |
| 8386 | bfd_elf32_write_out_phdrs, |
| 8387 | bfd_elf32_write_shdrs_and_ehdr, |
| 8388 | bfd_elf32_write_relocs, |
| 8389 | elf32_arm_swap_symbol_in, |
| 8390 | elf32_arm_swap_symbol_out, |
| 8391 | bfd_elf32_slurp_reloc_table, |
| 8392 | bfd_elf32_slurp_symbol_table, |
| 8393 | bfd_elf32_swap_dyn_in, |
| 8394 | bfd_elf32_swap_dyn_out, |
| 8395 | bfd_elf32_swap_reloc_in, |
| 8396 | bfd_elf32_swap_reloc_out, |
| 8397 | bfd_elf32_swap_reloca_in, |
| 8398 | bfd_elf32_swap_reloca_out |
| 8399 | }; |
| 8400 | |
| 8401 | #define ELF_ARCH bfd_arch_arm |
| 8402 | #define ELF_MACHINE_CODE EM_ARM |
| 8403 | #ifdef __QNXTARGET__ |
| 8404 | #define ELF_MAXPAGESIZE 0x1000 |
| 8405 | #else |
| 8406 | #define ELF_MAXPAGESIZE 0x8000 |
| 8407 | #endif |
| 8408 | #define ELF_MINPAGESIZE 0x1000 |
| 8409 | |
| 8410 | #define bfd_elf32_mkobject elf32_arm_mkobject |
| 8411 | |
| 8412 | #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data |
| 8413 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data |
| 8414 | #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags |
| 8415 | #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data |
| 8416 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create |
| 8417 | #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup |
| 8418 | #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line |
| 8419 | #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info |
| 8420 | #define bfd_elf32_new_section_hook elf32_arm_new_section_hook |
| 8421 | #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol |
| 8422 | #define bfd_elf32_close_and_cleanup elf32_arm_close_and_cleanup |
| 8423 | #define bfd_elf32_bfd_free_cached_info elf32_arm_bfd_free_cached_info |
| 8424 | #define bfd_elf32_bfd_final_link elf32_arm_bfd_final_link |
| 8425 | |
| 8426 | #define elf_backend_get_symbol_type elf32_arm_get_symbol_type |
| 8427 | #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook |
| 8428 | #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook |
| 8429 | #define elf_backend_check_relocs elf32_arm_check_relocs |
| 8430 | #define elf_backend_relocate_section elf32_arm_relocate_section |
| 8431 | #define elf_backend_write_section elf32_arm_write_section |
| 8432 | #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol |
| 8433 | #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections |
| 8434 | #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol |
| 8435 | #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections |
| 8436 | #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook |
| 8437 | #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections |
| 8438 | #define elf_backend_post_process_headers elf32_arm_post_process_headers |
| 8439 | #define elf_backend_reloc_type_class elf32_arm_reloc_type_class |
| 8440 | #define elf_backend_object_p elf32_arm_object_p |
| 8441 | #define elf_backend_section_flags elf32_arm_section_flags |
| 8442 | #define elf_backend_fake_sections elf32_arm_fake_sections |
| 8443 | #define elf_backend_section_from_shdr elf32_arm_section_from_shdr |
| 8444 | #define elf_backend_final_write_processing elf32_arm_final_write_processing |
| 8445 | #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol |
| 8446 | #define elf_backend_symbol_processing elf32_arm_symbol_processing |
| 8447 | #define elf_backend_size_info elf32_arm_size_info |
| 8448 | #define elf_backend_modify_segment_map elf32_arm_modify_segment_map |
| 8449 | #define elf_backend_additional_program_headers \ |
| 8450 | elf32_arm_additional_program_headers |
| 8451 | #define elf_backend_output_arch_local_syms \ |
| 8452 | elf32_arm_output_arch_local_syms |
| 8453 | |
| 8454 | #define elf_backend_can_refcount 1 |
| 8455 | #define elf_backend_can_gc_sections 1 |
| 8456 | #define elf_backend_plt_readonly 1 |
| 8457 | #define elf_backend_want_got_plt 1 |
| 8458 | #define elf_backend_want_plt_sym 0 |
| 8459 | #define elf_backend_may_use_rel_p 1 |
| 8460 | #define elf_backend_may_use_rela_p 0 |
| 8461 | #define elf_backend_default_use_rela_p 0 |
| 8462 | #define elf_backend_rela_normal 0 |
| 8463 | |
| 8464 | #define elf_backend_got_header_size 12 |
| 8465 | |
| 8466 | #include "elf32-target.h" |
| 8467 | |
| 8468 | /* VxWorks Targets */ |
| 8469 | |
| 8470 | #undef TARGET_LITTLE_SYM |
| 8471 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec |
| 8472 | #undef TARGET_LITTLE_NAME |
| 8473 | #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks" |
| 8474 | #undef TARGET_BIG_SYM |
| 8475 | #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec |
| 8476 | #undef TARGET_BIG_NAME |
| 8477 | #define TARGET_BIG_NAME "elf32-bigarm-vxworks" |
| 8478 | |
| 8479 | /* Like elf32_arm_link_hash_table_create -- but overrides |
| 8480 | appropriately for VxWorks. */ |
| 8481 | static struct bfd_link_hash_table * |
| 8482 | elf32_arm_vxworks_link_hash_table_create (bfd *abfd) |
| 8483 | { |
| 8484 | struct bfd_link_hash_table *ret; |
| 8485 | |
| 8486 | ret = elf32_arm_link_hash_table_create (abfd); |
| 8487 | if (ret) |
| 8488 | { |
| 8489 | struct elf32_arm_link_hash_table *htab |
| 8490 | = (struct elf32_arm_link_hash_table *) ret; |
| 8491 | htab->use_rel = 0; |
| 8492 | htab->vxworks_p = 1; |
| 8493 | } |
| 8494 | return ret; |
| 8495 | } |
| 8496 | |
| 8497 | static void |
| 8498 | elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) |
| 8499 | { |
| 8500 | elf32_arm_final_write_processing (abfd, linker); |
| 8501 | elf_vxworks_final_write_processing (abfd, linker); |
| 8502 | } |
| 8503 | |
| 8504 | #undef elf32_bed |
| 8505 | #define elf32_bed elf32_arm_vxworks_bed |
| 8506 | |
| 8507 | #undef bfd_elf32_bfd_link_hash_table_create |
| 8508 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 8509 | elf32_arm_vxworks_link_hash_table_create |
| 8510 | #undef elf_backend_add_symbol_hook |
| 8511 | #define elf_backend_add_symbol_hook \ |
| 8512 | elf_vxworks_add_symbol_hook |
| 8513 | #undef elf_backend_final_write_processing |
| 8514 | #define elf_backend_final_write_processing \ |
| 8515 | elf32_arm_vxworks_final_write_processing |
| 8516 | #undef elf_backend_emit_relocs |
| 8517 | #define elf_backend_emit_relocs \ |
| 8518 | elf_vxworks_emit_relocs |
| 8519 | |
| 8520 | #undef elf_backend_may_use_rel_p |
| 8521 | #define elf_backend_may_use_rel_p 0 |
| 8522 | #undef elf_backend_may_use_rela_p |
| 8523 | #define elf_backend_may_use_rela_p 1 |
| 8524 | #undef elf_backend_default_use_rela_p |
| 8525 | #define elf_backend_default_use_rela_p 1 |
| 8526 | #undef elf_backend_rela_normal |
| 8527 | #define elf_backend_rela_normal 1 |
| 8528 | #undef elf_backend_want_plt_sym |
| 8529 | #define elf_backend_want_plt_sym 1 |
| 8530 | #undef ELF_MAXPAGESIZE |
| 8531 | #define ELF_MAXPAGESIZE 0x1000 |
| 8532 | |
| 8533 | #include "elf32-target.h" |
| 8534 | |
| 8535 | |
| 8536 | /* Symbian OS Targets */ |
| 8537 | |
| 8538 | #undef TARGET_LITTLE_SYM |
| 8539 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec |
| 8540 | #undef TARGET_LITTLE_NAME |
| 8541 | #define TARGET_LITTLE_NAME "elf32-littlearm-symbian" |
| 8542 | #undef TARGET_BIG_SYM |
| 8543 | #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec |
| 8544 | #undef TARGET_BIG_NAME |
| 8545 | #define TARGET_BIG_NAME "elf32-bigarm-symbian" |
| 8546 | |
| 8547 | /* Like elf32_arm_link_hash_table_create -- but overrides |
| 8548 | appropriately for Symbian OS. */ |
| 8549 | static struct bfd_link_hash_table * |
| 8550 | elf32_arm_symbian_link_hash_table_create (bfd *abfd) |
| 8551 | { |
| 8552 | struct bfd_link_hash_table *ret; |
| 8553 | |
| 8554 | ret = elf32_arm_link_hash_table_create (abfd); |
| 8555 | if (ret) |
| 8556 | { |
| 8557 | struct elf32_arm_link_hash_table *htab |
| 8558 | = (struct elf32_arm_link_hash_table *)ret; |
| 8559 | /* There is no PLT header for Symbian OS. */ |
| 8560 | htab->plt_header_size = 0; |
| 8561 | /* The PLT entries are each three instructions. */ |
| 8562 | htab->plt_entry_size = 4 * NUM_ELEM (elf32_arm_symbian_plt_entry); |
| 8563 | htab->symbian_p = 1; |
| 8564 | /* Symbian uses armv5t or above, so use_blx is always true. */ |
| 8565 | htab->use_blx = 1; |
| 8566 | htab->root.is_relocatable_executable = 1; |
| 8567 | } |
| 8568 | return ret; |
| 8569 | } |
| 8570 | |
| 8571 | static const struct bfd_elf_special_section |
| 8572 | elf32_arm_symbian_special_sections[] = |
| 8573 | { |
| 8574 | /* In a BPABI executable, the dynamic linking sections do not go in |
| 8575 | the loadable read-only segment. The post-linker may wish to |
| 8576 | refer to these sections, but they are not part of the final |
| 8577 | program image. */ |
| 8578 | { ".dynamic", 8, 0, SHT_DYNAMIC, 0 }, |
| 8579 | { ".dynstr", 7, 0, SHT_STRTAB, 0 }, |
| 8580 | { ".dynsym", 7, 0, SHT_DYNSYM, 0 }, |
| 8581 | { ".got", 4, 0, SHT_PROGBITS, 0 }, |
| 8582 | { ".hash", 5, 0, SHT_HASH, 0 }, |
| 8583 | /* These sections do not need to be writable as the SymbianOS |
| 8584 | postlinker will arrange things so that no dynamic relocation is |
| 8585 | required. */ |
| 8586 | { ".init_array", 11, 0, SHT_INIT_ARRAY, SHF_ALLOC }, |
| 8587 | { ".fini_array", 11, 0, SHT_FINI_ARRAY, SHF_ALLOC }, |
| 8588 | { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY, SHF_ALLOC }, |
| 8589 | { NULL, 0, 0, 0, 0 } |
| 8590 | }; |
| 8591 | |
| 8592 | static void |
| 8593 | elf32_arm_symbian_begin_write_processing (bfd *abfd, |
| 8594 | struct bfd_link_info *link_info |
| 8595 | ATTRIBUTE_UNUSED) |
| 8596 | { |
| 8597 | /* BPABI objects are never loaded directly by an OS kernel; they are |
| 8598 | processed by a postlinker first, into an OS-specific format. If |
| 8599 | the D_PAGED bit is set on the file, BFD will align segments on |
| 8600 | page boundaries, so that an OS can directly map the file. With |
| 8601 | BPABI objects, that just results in wasted space. In addition, |
| 8602 | because we clear the D_PAGED bit, map_sections_to_segments will |
| 8603 | recognize that the program headers should not be mapped into any |
| 8604 | loadable segment. */ |
| 8605 | abfd->flags &= ~D_PAGED; |
| 8606 | } |
| 8607 | |
| 8608 | static bfd_boolean |
| 8609 | elf32_arm_symbian_modify_segment_map (bfd *abfd, |
| 8610 | struct bfd_link_info *info) |
| 8611 | { |
| 8612 | struct elf_segment_map *m; |
| 8613 | asection *dynsec; |
| 8614 | |
| 8615 | /* BPABI shared libraries and executables should have a PT_DYNAMIC |
| 8616 | segment. However, because the .dynamic section is not marked |
| 8617 | with SEC_LOAD, the generic ELF code will not create such a |
| 8618 | segment. */ |
| 8619 | dynsec = bfd_get_section_by_name (abfd, ".dynamic"); |
| 8620 | if (dynsec) |
| 8621 | { |
| 8622 | m = _bfd_elf_make_dynamic_segment (abfd, dynsec); |
| 8623 | m->next = elf_tdata (abfd)->segment_map; |
| 8624 | elf_tdata (abfd)->segment_map = m; |
| 8625 | } |
| 8626 | |
| 8627 | /* Also call the generic arm routine. */ |
| 8628 | return elf32_arm_modify_segment_map (abfd, info); |
| 8629 | } |
| 8630 | |
| 8631 | #undef elf32_bed |
| 8632 | #define elf32_bed elf32_arm_symbian_bed |
| 8633 | |
| 8634 | /* The dynamic sections are not allocated on SymbianOS; the postlinker |
| 8635 | will process them and then discard them. */ |
| 8636 | #undef ELF_DYNAMIC_SEC_FLAGS |
| 8637 | #define ELF_DYNAMIC_SEC_FLAGS \ |
| 8638 | (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED) |
| 8639 | |
| 8640 | #undef bfd_elf32_bfd_link_hash_table_create |
| 8641 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 8642 | elf32_arm_symbian_link_hash_table_create |
| 8643 | #undef elf_backend_add_symbol_hook |
| 8644 | |
| 8645 | #undef elf_backend_special_sections |
| 8646 | #define elf_backend_special_sections elf32_arm_symbian_special_sections |
| 8647 | |
| 8648 | #undef elf_backend_begin_write_processing |
| 8649 | #define elf_backend_begin_write_processing \ |
| 8650 | elf32_arm_symbian_begin_write_processing |
| 8651 | #undef elf_backend_final_write_processing |
| 8652 | #define elf_backend_final_write_processing \ |
| 8653 | elf32_arm_final_write_processing |
| 8654 | #undef elf_backend_emit_relocs |
| 8655 | |
| 8656 | #undef elf_backend_modify_segment_map |
| 8657 | #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map |
| 8658 | |
| 8659 | /* There is no .got section for BPABI objects, and hence no header. */ |
| 8660 | #undef elf_backend_got_header_size |
| 8661 | #define elf_backend_got_header_size 0 |
| 8662 | |
| 8663 | /* Similarly, there is no .got.plt section. */ |
| 8664 | #undef elf_backend_want_got_plt |
| 8665 | #define elf_backend_want_got_plt 0 |
| 8666 | |
| 8667 | #undef elf_backend_may_use_rel_p |
| 8668 | #define elf_backend_may_use_rel_p 1 |
| 8669 | #undef elf_backend_may_use_rela_p |
| 8670 | #define elf_backend_may_use_rela_p 0 |
| 8671 | #undef elf_backend_default_use_rela_p |
| 8672 | #define elf_backend_default_use_rela_p 0 |
| 8673 | #undef elf_backend_rela_normal |
| 8674 | #define elf_backend_rela_normal 0 |
| 8675 | #undef elf_backend_want_plt_sym |
| 8676 | #define elf_backend_want_plt_sym 0 |
| 8677 | #undef ELF_MAXPAGESIZE |
| 8678 | #define ELF_MAXPAGESIZE 0x8000 |
| 8679 | |
| 8680 | #include "elf32-target.h" |