| 1 | /* 32-bit ELF support for ARM |
| 2 | Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
| 3 | 2008, 2009, 2010 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 3 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, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include <limits.h> |
| 24 | |
| 25 | #include "bfd.h" |
| 26 | #include "libiberty.h" |
| 27 | #include "libbfd.h" |
| 28 | #include "elf-bfd.h" |
| 29 | #include "elf-vxworks.h" |
| 30 | #include "elf/arm.h" |
| 31 | |
| 32 | /* Return the relocation section associated with NAME. HTAB is the |
| 33 | bfd's elf32_arm_link_hash_entry. */ |
| 34 | #define RELOC_SECTION(HTAB, NAME) \ |
| 35 | ((HTAB)->use_rel ? ".rel" NAME : ".rela" NAME) |
| 36 | |
| 37 | /* Return size of a relocation entry. HTAB is the bfd's |
| 38 | elf32_arm_link_hash_entry. */ |
| 39 | #define RELOC_SIZE(HTAB) \ |
| 40 | ((HTAB)->use_rel \ |
| 41 | ? sizeof (Elf32_External_Rel) \ |
| 42 | : sizeof (Elf32_External_Rela)) |
| 43 | |
| 44 | /* Return function to swap relocations in. HTAB is the bfd's |
| 45 | elf32_arm_link_hash_entry. */ |
| 46 | #define SWAP_RELOC_IN(HTAB) \ |
| 47 | ((HTAB)->use_rel \ |
| 48 | ? bfd_elf32_swap_reloc_in \ |
| 49 | : bfd_elf32_swap_reloca_in) |
| 50 | |
| 51 | /* Return function to swap relocations out. HTAB is the bfd's |
| 52 | elf32_arm_link_hash_entry. */ |
| 53 | #define SWAP_RELOC_OUT(HTAB) \ |
| 54 | ((HTAB)->use_rel \ |
| 55 | ? bfd_elf32_swap_reloc_out \ |
| 56 | : bfd_elf32_swap_reloca_out) |
| 57 | |
| 58 | #define elf_info_to_howto 0 |
| 59 | #define elf_info_to_howto_rel elf32_arm_info_to_howto |
| 60 | |
| 61 | #define ARM_ELF_ABI_VERSION 0 |
| 62 | #define ARM_ELF_OS_ABI_VERSION ELFOSABI_ARM |
| 63 | |
| 64 | static bfd_boolean elf32_arm_write_section (bfd *output_bfd, |
| 65 | struct bfd_link_info *link_info, |
| 66 | asection *sec, |
| 67 | bfd_byte *contents); |
| 68 | |
| 69 | /* Note: code such as elf32_arm_reloc_type_lookup expect to use e.g. |
| 70 | R_ARM_PC24 as an index into this, and find the R_ARM_PC24 HOWTO |
| 71 | in that slot. */ |
| 72 | |
| 73 | static reloc_howto_type elf32_arm_howto_table_1[] = |
| 74 | { |
| 75 | /* No relocation. */ |
| 76 | HOWTO (R_ARM_NONE, /* type */ |
| 77 | 0, /* rightshift */ |
| 78 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 79 | 0, /* bitsize */ |
| 80 | FALSE, /* pc_relative */ |
| 81 | 0, /* bitpos */ |
| 82 | complain_overflow_dont,/* complain_on_overflow */ |
| 83 | bfd_elf_generic_reloc, /* special_function */ |
| 84 | "R_ARM_NONE", /* name */ |
| 85 | FALSE, /* partial_inplace */ |
| 86 | 0, /* src_mask */ |
| 87 | 0, /* dst_mask */ |
| 88 | FALSE), /* pcrel_offset */ |
| 89 | |
| 90 | HOWTO (R_ARM_PC24, /* type */ |
| 91 | 2, /* rightshift */ |
| 92 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 93 | 24, /* bitsize */ |
| 94 | TRUE, /* pc_relative */ |
| 95 | 0, /* bitpos */ |
| 96 | complain_overflow_signed,/* complain_on_overflow */ |
| 97 | bfd_elf_generic_reloc, /* special_function */ |
| 98 | "R_ARM_PC24", /* name */ |
| 99 | FALSE, /* partial_inplace */ |
| 100 | 0x00ffffff, /* src_mask */ |
| 101 | 0x00ffffff, /* dst_mask */ |
| 102 | TRUE), /* pcrel_offset */ |
| 103 | |
| 104 | /* 32 bit absolute */ |
| 105 | HOWTO (R_ARM_ABS32, /* type */ |
| 106 | 0, /* rightshift */ |
| 107 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 108 | 32, /* bitsize */ |
| 109 | FALSE, /* pc_relative */ |
| 110 | 0, /* bitpos */ |
| 111 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 112 | bfd_elf_generic_reloc, /* special_function */ |
| 113 | "R_ARM_ABS32", /* name */ |
| 114 | FALSE, /* partial_inplace */ |
| 115 | 0xffffffff, /* src_mask */ |
| 116 | 0xffffffff, /* dst_mask */ |
| 117 | FALSE), /* pcrel_offset */ |
| 118 | |
| 119 | /* standard 32bit pc-relative reloc */ |
| 120 | HOWTO (R_ARM_REL32, /* type */ |
| 121 | 0, /* rightshift */ |
| 122 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 123 | 32, /* bitsize */ |
| 124 | TRUE, /* pc_relative */ |
| 125 | 0, /* bitpos */ |
| 126 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 127 | bfd_elf_generic_reloc, /* special_function */ |
| 128 | "R_ARM_REL32", /* name */ |
| 129 | FALSE, /* partial_inplace */ |
| 130 | 0xffffffff, /* src_mask */ |
| 131 | 0xffffffff, /* dst_mask */ |
| 132 | TRUE), /* pcrel_offset */ |
| 133 | |
| 134 | /* 8 bit absolute - R_ARM_LDR_PC_G0 in AAELF */ |
| 135 | HOWTO (R_ARM_LDR_PC_G0, /* type */ |
| 136 | 0, /* rightshift */ |
| 137 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 138 | 32, /* bitsize */ |
| 139 | TRUE, /* pc_relative */ |
| 140 | 0, /* bitpos */ |
| 141 | complain_overflow_dont,/* complain_on_overflow */ |
| 142 | bfd_elf_generic_reloc, /* special_function */ |
| 143 | "R_ARM_LDR_PC_G0", /* name */ |
| 144 | FALSE, /* partial_inplace */ |
| 145 | 0xffffffff, /* src_mask */ |
| 146 | 0xffffffff, /* dst_mask */ |
| 147 | TRUE), /* pcrel_offset */ |
| 148 | |
| 149 | /* 16 bit absolute */ |
| 150 | HOWTO (R_ARM_ABS16, /* type */ |
| 151 | 0, /* rightshift */ |
| 152 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 153 | 16, /* bitsize */ |
| 154 | FALSE, /* pc_relative */ |
| 155 | 0, /* bitpos */ |
| 156 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 157 | bfd_elf_generic_reloc, /* special_function */ |
| 158 | "R_ARM_ABS16", /* name */ |
| 159 | FALSE, /* partial_inplace */ |
| 160 | 0x0000ffff, /* src_mask */ |
| 161 | 0x0000ffff, /* dst_mask */ |
| 162 | FALSE), /* pcrel_offset */ |
| 163 | |
| 164 | /* 12 bit absolute */ |
| 165 | HOWTO (R_ARM_ABS12, /* type */ |
| 166 | 0, /* rightshift */ |
| 167 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 168 | 12, /* bitsize */ |
| 169 | FALSE, /* pc_relative */ |
| 170 | 0, /* bitpos */ |
| 171 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 172 | bfd_elf_generic_reloc, /* special_function */ |
| 173 | "R_ARM_ABS12", /* name */ |
| 174 | FALSE, /* partial_inplace */ |
| 175 | 0x00000fff, /* src_mask */ |
| 176 | 0x00000fff, /* dst_mask */ |
| 177 | FALSE), /* pcrel_offset */ |
| 178 | |
| 179 | HOWTO (R_ARM_THM_ABS5, /* type */ |
| 180 | 6, /* rightshift */ |
| 181 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 182 | 5, /* bitsize */ |
| 183 | FALSE, /* pc_relative */ |
| 184 | 0, /* bitpos */ |
| 185 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 186 | bfd_elf_generic_reloc, /* special_function */ |
| 187 | "R_ARM_THM_ABS5", /* name */ |
| 188 | FALSE, /* partial_inplace */ |
| 189 | 0x000007e0, /* src_mask */ |
| 190 | 0x000007e0, /* dst_mask */ |
| 191 | FALSE), /* pcrel_offset */ |
| 192 | |
| 193 | /* 8 bit absolute */ |
| 194 | HOWTO (R_ARM_ABS8, /* type */ |
| 195 | 0, /* rightshift */ |
| 196 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 197 | 8, /* bitsize */ |
| 198 | FALSE, /* pc_relative */ |
| 199 | 0, /* bitpos */ |
| 200 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 201 | bfd_elf_generic_reloc, /* special_function */ |
| 202 | "R_ARM_ABS8", /* name */ |
| 203 | FALSE, /* partial_inplace */ |
| 204 | 0x000000ff, /* src_mask */ |
| 205 | 0x000000ff, /* dst_mask */ |
| 206 | FALSE), /* pcrel_offset */ |
| 207 | |
| 208 | HOWTO (R_ARM_SBREL32, /* type */ |
| 209 | 0, /* rightshift */ |
| 210 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 211 | 32, /* bitsize */ |
| 212 | FALSE, /* pc_relative */ |
| 213 | 0, /* bitpos */ |
| 214 | complain_overflow_dont,/* complain_on_overflow */ |
| 215 | bfd_elf_generic_reloc, /* special_function */ |
| 216 | "R_ARM_SBREL32", /* name */ |
| 217 | FALSE, /* partial_inplace */ |
| 218 | 0xffffffff, /* src_mask */ |
| 219 | 0xffffffff, /* dst_mask */ |
| 220 | FALSE), /* pcrel_offset */ |
| 221 | |
| 222 | HOWTO (R_ARM_THM_CALL, /* type */ |
| 223 | 1, /* rightshift */ |
| 224 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 225 | 24, /* bitsize */ |
| 226 | TRUE, /* pc_relative */ |
| 227 | 0, /* bitpos */ |
| 228 | complain_overflow_signed,/* complain_on_overflow */ |
| 229 | bfd_elf_generic_reloc, /* special_function */ |
| 230 | "R_ARM_THM_CALL", /* name */ |
| 231 | FALSE, /* partial_inplace */ |
| 232 | 0x07ff07ff, /* src_mask */ |
| 233 | 0x07ff07ff, /* dst_mask */ |
| 234 | TRUE), /* pcrel_offset */ |
| 235 | |
| 236 | HOWTO (R_ARM_THM_PC8, /* type */ |
| 237 | 1, /* rightshift */ |
| 238 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 239 | 8, /* bitsize */ |
| 240 | TRUE, /* pc_relative */ |
| 241 | 0, /* bitpos */ |
| 242 | complain_overflow_signed,/* complain_on_overflow */ |
| 243 | bfd_elf_generic_reloc, /* special_function */ |
| 244 | "R_ARM_THM_PC8", /* name */ |
| 245 | FALSE, /* partial_inplace */ |
| 246 | 0x000000ff, /* src_mask */ |
| 247 | 0x000000ff, /* dst_mask */ |
| 248 | TRUE), /* pcrel_offset */ |
| 249 | |
| 250 | HOWTO (R_ARM_BREL_ADJ, /* type */ |
| 251 | 1, /* rightshift */ |
| 252 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 253 | 32, /* bitsize */ |
| 254 | FALSE, /* pc_relative */ |
| 255 | 0, /* bitpos */ |
| 256 | complain_overflow_signed,/* complain_on_overflow */ |
| 257 | bfd_elf_generic_reloc, /* special_function */ |
| 258 | "R_ARM_BREL_ADJ", /* name */ |
| 259 | FALSE, /* partial_inplace */ |
| 260 | 0xffffffff, /* src_mask */ |
| 261 | 0xffffffff, /* dst_mask */ |
| 262 | FALSE), /* pcrel_offset */ |
| 263 | |
| 264 | HOWTO (R_ARM_SWI24, /* type */ |
| 265 | 0, /* rightshift */ |
| 266 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 267 | 0, /* bitsize */ |
| 268 | FALSE, /* pc_relative */ |
| 269 | 0, /* bitpos */ |
| 270 | complain_overflow_signed,/* complain_on_overflow */ |
| 271 | bfd_elf_generic_reloc, /* special_function */ |
| 272 | "R_ARM_SWI24", /* name */ |
| 273 | FALSE, /* partial_inplace */ |
| 274 | 0x00000000, /* src_mask */ |
| 275 | 0x00000000, /* dst_mask */ |
| 276 | FALSE), /* pcrel_offset */ |
| 277 | |
| 278 | HOWTO (R_ARM_THM_SWI8, /* type */ |
| 279 | 0, /* rightshift */ |
| 280 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 281 | 0, /* bitsize */ |
| 282 | FALSE, /* pc_relative */ |
| 283 | 0, /* bitpos */ |
| 284 | complain_overflow_signed,/* complain_on_overflow */ |
| 285 | bfd_elf_generic_reloc, /* special_function */ |
| 286 | "R_ARM_SWI8", /* name */ |
| 287 | FALSE, /* partial_inplace */ |
| 288 | 0x00000000, /* src_mask */ |
| 289 | 0x00000000, /* dst_mask */ |
| 290 | FALSE), /* pcrel_offset */ |
| 291 | |
| 292 | /* BLX instruction for the ARM. */ |
| 293 | HOWTO (R_ARM_XPC25, /* type */ |
| 294 | 2, /* rightshift */ |
| 295 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 296 | 25, /* bitsize */ |
| 297 | TRUE, /* pc_relative */ |
| 298 | 0, /* bitpos */ |
| 299 | complain_overflow_signed,/* complain_on_overflow */ |
| 300 | bfd_elf_generic_reloc, /* special_function */ |
| 301 | "R_ARM_XPC25", /* name */ |
| 302 | FALSE, /* partial_inplace */ |
| 303 | 0x00ffffff, /* src_mask */ |
| 304 | 0x00ffffff, /* dst_mask */ |
| 305 | TRUE), /* pcrel_offset */ |
| 306 | |
| 307 | /* BLX instruction for the Thumb. */ |
| 308 | HOWTO (R_ARM_THM_XPC22, /* type */ |
| 309 | 2, /* rightshift */ |
| 310 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 311 | 22, /* bitsize */ |
| 312 | TRUE, /* pc_relative */ |
| 313 | 0, /* bitpos */ |
| 314 | complain_overflow_signed,/* complain_on_overflow */ |
| 315 | bfd_elf_generic_reloc, /* special_function */ |
| 316 | "R_ARM_THM_XPC22", /* name */ |
| 317 | FALSE, /* partial_inplace */ |
| 318 | 0x07ff07ff, /* src_mask */ |
| 319 | 0x07ff07ff, /* dst_mask */ |
| 320 | TRUE), /* pcrel_offset */ |
| 321 | |
| 322 | /* Dynamic TLS relocations. */ |
| 323 | |
| 324 | HOWTO (R_ARM_TLS_DTPMOD32, /* type */ |
| 325 | 0, /* rightshift */ |
| 326 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 327 | 32, /* bitsize */ |
| 328 | FALSE, /* pc_relative */ |
| 329 | 0, /* bitpos */ |
| 330 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 331 | bfd_elf_generic_reloc, /* special_function */ |
| 332 | "R_ARM_TLS_DTPMOD32", /* name */ |
| 333 | TRUE, /* partial_inplace */ |
| 334 | 0xffffffff, /* src_mask */ |
| 335 | 0xffffffff, /* dst_mask */ |
| 336 | FALSE), /* pcrel_offset */ |
| 337 | |
| 338 | HOWTO (R_ARM_TLS_DTPOFF32, /* type */ |
| 339 | 0, /* rightshift */ |
| 340 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 341 | 32, /* bitsize */ |
| 342 | FALSE, /* pc_relative */ |
| 343 | 0, /* bitpos */ |
| 344 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 345 | bfd_elf_generic_reloc, /* special_function */ |
| 346 | "R_ARM_TLS_DTPOFF32", /* name */ |
| 347 | TRUE, /* partial_inplace */ |
| 348 | 0xffffffff, /* src_mask */ |
| 349 | 0xffffffff, /* dst_mask */ |
| 350 | FALSE), /* pcrel_offset */ |
| 351 | |
| 352 | HOWTO (R_ARM_TLS_TPOFF32, /* type */ |
| 353 | 0, /* rightshift */ |
| 354 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 355 | 32, /* bitsize */ |
| 356 | FALSE, /* pc_relative */ |
| 357 | 0, /* bitpos */ |
| 358 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 359 | bfd_elf_generic_reloc, /* special_function */ |
| 360 | "R_ARM_TLS_TPOFF32", /* name */ |
| 361 | TRUE, /* partial_inplace */ |
| 362 | 0xffffffff, /* src_mask */ |
| 363 | 0xffffffff, /* dst_mask */ |
| 364 | FALSE), /* pcrel_offset */ |
| 365 | |
| 366 | /* Relocs used in ARM Linux */ |
| 367 | |
| 368 | HOWTO (R_ARM_COPY, /* type */ |
| 369 | 0, /* rightshift */ |
| 370 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 371 | 32, /* bitsize */ |
| 372 | FALSE, /* pc_relative */ |
| 373 | 0, /* bitpos */ |
| 374 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 375 | bfd_elf_generic_reloc, /* special_function */ |
| 376 | "R_ARM_COPY", /* name */ |
| 377 | TRUE, /* partial_inplace */ |
| 378 | 0xffffffff, /* src_mask */ |
| 379 | 0xffffffff, /* dst_mask */ |
| 380 | FALSE), /* pcrel_offset */ |
| 381 | |
| 382 | HOWTO (R_ARM_GLOB_DAT, /* type */ |
| 383 | 0, /* rightshift */ |
| 384 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 385 | 32, /* bitsize */ |
| 386 | FALSE, /* pc_relative */ |
| 387 | 0, /* bitpos */ |
| 388 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 389 | bfd_elf_generic_reloc, /* special_function */ |
| 390 | "R_ARM_GLOB_DAT", /* name */ |
| 391 | TRUE, /* partial_inplace */ |
| 392 | 0xffffffff, /* src_mask */ |
| 393 | 0xffffffff, /* dst_mask */ |
| 394 | FALSE), /* pcrel_offset */ |
| 395 | |
| 396 | HOWTO (R_ARM_JUMP_SLOT, /* type */ |
| 397 | 0, /* rightshift */ |
| 398 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 399 | 32, /* bitsize */ |
| 400 | FALSE, /* pc_relative */ |
| 401 | 0, /* bitpos */ |
| 402 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 403 | bfd_elf_generic_reloc, /* special_function */ |
| 404 | "R_ARM_JUMP_SLOT", /* name */ |
| 405 | TRUE, /* partial_inplace */ |
| 406 | 0xffffffff, /* src_mask */ |
| 407 | 0xffffffff, /* dst_mask */ |
| 408 | FALSE), /* pcrel_offset */ |
| 409 | |
| 410 | HOWTO (R_ARM_RELATIVE, /* type */ |
| 411 | 0, /* rightshift */ |
| 412 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 413 | 32, /* bitsize */ |
| 414 | FALSE, /* pc_relative */ |
| 415 | 0, /* bitpos */ |
| 416 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 417 | bfd_elf_generic_reloc, /* special_function */ |
| 418 | "R_ARM_RELATIVE", /* name */ |
| 419 | TRUE, /* partial_inplace */ |
| 420 | 0xffffffff, /* src_mask */ |
| 421 | 0xffffffff, /* dst_mask */ |
| 422 | FALSE), /* pcrel_offset */ |
| 423 | |
| 424 | HOWTO (R_ARM_GOTOFF32, /* type */ |
| 425 | 0, /* rightshift */ |
| 426 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 427 | 32, /* bitsize */ |
| 428 | FALSE, /* pc_relative */ |
| 429 | 0, /* bitpos */ |
| 430 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 431 | bfd_elf_generic_reloc, /* special_function */ |
| 432 | "R_ARM_GOTOFF32", /* name */ |
| 433 | TRUE, /* partial_inplace */ |
| 434 | 0xffffffff, /* src_mask */ |
| 435 | 0xffffffff, /* dst_mask */ |
| 436 | FALSE), /* pcrel_offset */ |
| 437 | |
| 438 | HOWTO (R_ARM_GOTPC, /* type */ |
| 439 | 0, /* rightshift */ |
| 440 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 441 | 32, /* bitsize */ |
| 442 | TRUE, /* pc_relative */ |
| 443 | 0, /* bitpos */ |
| 444 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 445 | bfd_elf_generic_reloc, /* special_function */ |
| 446 | "R_ARM_GOTPC", /* name */ |
| 447 | TRUE, /* partial_inplace */ |
| 448 | 0xffffffff, /* src_mask */ |
| 449 | 0xffffffff, /* dst_mask */ |
| 450 | TRUE), /* pcrel_offset */ |
| 451 | |
| 452 | HOWTO (R_ARM_GOT32, /* type */ |
| 453 | 0, /* rightshift */ |
| 454 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 455 | 32, /* bitsize */ |
| 456 | FALSE, /* pc_relative */ |
| 457 | 0, /* bitpos */ |
| 458 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 459 | bfd_elf_generic_reloc, /* special_function */ |
| 460 | "R_ARM_GOT32", /* name */ |
| 461 | TRUE, /* partial_inplace */ |
| 462 | 0xffffffff, /* src_mask */ |
| 463 | 0xffffffff, /* dst_mask */ |
| 464 | FALSE), /* pcrel_offset */ |
| 465 | |
| 466 | HOWTO (R_ARM_PLT32, /* type */ |
| 467 | 2, /* rightshift */ |
| 468 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 469 | 24, /* bitsize */ |
| 470 | TRUE, /* pc_relative */ |
| 471 | 0, /* bitpos */ |
| 472 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 473 | bfd_elf_generic_reloc, /* special_function */ |
| 474 | "R_ARM_PLT32", /* name */ |
| 475 | FALSE, /* partial_inplace */ |
| 476 | 0x00ffffff, /* src_mask */ |
| 477 | 0x00ffffff, /* dst_mask */ |
| 478 | TRUE), /* pcrel_offset */ |
| 479 | |
| 480 | HOWTO (R_ARM_CALL, /* type */ |
| 481 | 2, /* rightshift */ |
| 482 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 483 | 24, /* bitsize */ |
| 484 | TRUE, /* pc_relative */ |
| 485 | 0, /* bitpos */ |
| 486 | complain_overflow_signed,/* complain_on_overflow */ |
| 487 | bfd_elf_generic_reloc, /* special_function */ |
| 488 | "R_ARM_CALL", /* name */ |
| 489 | FALSE, /* partial_inplace */ |
| 490 | 0x00ffffff, /* src_mask */ |
| 491 | 0x00ffffff, /* dst_mask */ |
| 492 | TRUE), /* pcrel_offset */ |
| 493 | |
| 494 | HOWTO (R_ARM_JUMP24, /* type */ |
| 495 | 2, /* rightshift */ |
| 496 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 497 | 24, /* bitsize */ |
| 498 | TRUE, /* pc_relative */ |
| 499 | 0, /* bitpos */ |
| 500 | complain_overflow_signed,/* complain_on_overflow */ |
| 501 | bfd_elf_generic_reloc, /* special_function */ |
| 502 | "R_ARM_JUMP24", /* name */ |
| 503 | FALSE, /* partial_inplace */ |
| 504 | 0x00ffffff, /* src_mask */ |
| 505 | 0x00ffffff, /* dst_mask */ |
| 506 | TRUE), /* pcrel_offset */ |
| 507 | |
| 508 | HOWTO (R_ARM_THM_JUMP24, /* type */ |
| 509 | 1, /* rightshift */ |
| 510 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 511 | 24, /* bitsize */ |
| 512 | TRUE, /* pc_relative */ |
| 513 | 0, /* bitpos */ |
| 514 | complain_overflow_signed,/* complain_on_overflow */ |
| 515 | bfd_elf_generic_reloc, /* special_function */ |
| 516 | "R_ARM_THM_JUMP24", /* name */ |
| 517 | FALSE, /* partial_inplace */ |
| 518 | 0x07ff2fff, /* src_mask */ |
| 519 | 0x07ff2fff, /* dst_mask */ |
| 520 | TRUE), /* pcrel_offset */ |
| 521 | |
| 522 | HOWTO (R_ARM_BASE_ABS, /* type */ |
| 523 | 0, /* rightshift */ |
| 524 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 525 | 32, /* bitsize */ |
| 526 | FALSE, /* pc_relative */ |
| 527 | 0, /* bitpos */ |
| 528 | complain_overflow_dont,/* complain_on_overflow */ |
| 529 | bfd_elf_generic_reloc, /* special_function */ |
| 530 | "R_ARM_BASE_ABS", /* name */ |
| 531 | FALSE, /* partial_inplace */ |
| 532 | 0xffffffff, /* src_mask */ |
| 533 | 0xffffffff, /* dst_mask */ |
| 534 | FALSE), /* pcrel_offset */ |
| 535 | |
| 536 | HOWTO (R_ARM_ALU_PCREL7_0, /* type */ |
| 537 | 0, /* rightshift */ |
| 538 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 539 | 12, /* bitsize */ |
| 540 | TRUE, /* pc_relative */ |
| 541 | 0, /* bitpos */ |
| 542 | complain_overflow_dont,/* complain_on_overflow */ |
| 543 | bfd_elf_generic_reloc, /* special_function */ |
| 544 | "R_ARM_ALU_PCREL_7_0", /* name */ |
| 545 | FALSE, /* partial_inplace */ |
| 546 | 0x00000fff, /* src_mask */ |
| 547 | 0x00000fff, /* dst_mask */ |
| 548 | TRUE), /* pcrel_offset */ |
| 549 | |
| 550 | HOWTO (R_ARM_ALU_PCREL15_8, /* type */ |
| 551 | 0, /* rightshift */ |
| 552 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 553 | 12, /* bitsize */ |
| 554 | TRUE, /* pc_relative */ |
| 555 | 8, /* bitpos */ |
| 556 | complain_overflow_dont,/* complain_on_overflow */ |
| 557 | bfd_elf_generic_reloc, /* special_function */ |
| 558 | "R_ARM_ALU_PCREL_15_8",/* name */ |
| 559 | FALSE, /* partial_inplace */ |
| 560 | 0x00000fff, /* src_mask */ |
| 561 | 0x00000fff, /* dst_mask */ |
| 562 | TRUE), /* pcrel_offset */ |
| 563 | |
| 564 | HOWTO (R_ARM_ALU_PCREL23_15, /* type */ |
| 565 | 0, /* rightshift */ |
| 566 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 567 | 12, /* bitsize */ |
| 568 | TRUE, /* pc_relative */ |
| 569 | 16, /* bitpos */ |
| 570 | complain_overflow_dont,/* complain_on_overflow */ |
| 571 | bfd_elf_generic_reloc, /* special_function */ |
| 572 | "R_ARM_ALU_PCREL_23_15",/* name */ |
| 573 | FALSE, /* partial_inplace */ |
| 574 | 0x00000fff, /* src_mask */ |
| 575 | 0x00000fff, /* dst_mask */ |
| 576 | TRUE), /* pcrel_offset */ |
| 577 | |
| 578 | HOWTO (R_ARM_LDR_SBREL_11_0, /* type */ |
| 579 | 0, /* rightshift */ |
| 580 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 581 | 12, /* bitsize */ |
| 582 | FALSE, /* pc_relative */ |
| 583 | 0, /* bitpos */ |
| 584 | complain_overflow_dont,/* complain_on_overflow */ |
| 585 | bfd_elf_generic_reloc, /* special_function */ |
| 586 | "R_ARM_LDR_SBREL_11_0",/* name */ |
| 587 | FALSE, /* partial_inplace */ |
| 588 | 0x00000fff, /* src_mask */ |
| 589 | 0x00000fff, /* dst_mask */ |
| 590 | FALSE), /* pcrel_offset */ |
| 591 | |
| 592 | HOWTO (R_ARM_ALU_SBREL_19_12, /* type */ |
| 593 | 0, /* rightshift */ |
| 594 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 595 | 8, /* bitsize */ |
| 596 | FALSE, /* pc_relative */ |
| 597 | 12, /* bitpos */ |
| 598 | complain_overflow_dont,/* complain_on_overflow */ |
| 599 | bfd_elf_generic_reloc, /* special_function */ |
| 600 | "R_ARM_ALU_SBREL_19_12",/* name */ |
| 601 | FALSE, /* partial_inplace */ |
| 602 | 0x000ff000, /* src_mask */ |
| 603 | 0x000ff000, /* dst_mask */ |
| 604 | FALSE), /* pcrel_offset */ |
| 605 | |
| 606 | HOWTO (R_ARM_ALU_SBREL_27_20, /* type */ |
| 607 | 0, /* rightshift */ |
| 608 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 609 | 8, /* bitsize */ |
| 610 | FALSE, /* pc_relative */ |
| 611 | 20, /* bitpos */ |
| 612 | complain_overflow_dont,/* complain_on_overflow */ |
| 613 | bfd_elf_generic_reloc, /* special_function */ |
| 614 | "R_ARM_ALU_SBREL_27_20",/* name */ |
| 615 | FALSE, /* partial_inplace */ |
| 616 | 0x0ff00000, /* src_mask */ |
| 617 | 0x0ff00000, /* dst_mask */ |
| 618 | FALSE), /* pcrel_offset */ |
| 619 | |
| 620 | HOWTO (R_ARM_TARGET1, /* type */ |
| 621 | 0, /* rightshift */ |
| 622 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 623 | 32, /* bitsize */ |
| 624 | FALSE, /* pc_relative */ |
| 625 | 0, /* bitpos */ |
| 626 | complain_overflow_dont,/* complain_on_overflow */ |
| 627 | bfd_elf_generic_reloc, /* special_function */ |
| 628 | "R_ARM_TARGET1", /* name */ |
| 629 | FALSE, /* partial_inplace */ |
| 630 | 0xffffffff, /* src_mask */ |
| 631 | 0xffffffff, /* dst_mask */ |
| 632 | FALSE), /* pcrel_offset */ |
| 633 | |
| 634 | HOWTO (R_ARM_ROSEGREL32, /* type */ |
| 635 | 0, /* rightshift */ |
| 636 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 637 | 32, /* bitsize */ |
| 638 | FALSE, /* pc_relative */ |
| 639 | 0, /* bitpos */ |
| 640 | complain_overflow_dont,/* complain_on_overflow */ |
| 641 | bfd_elf_generic_reloc, /* special_function */ |
| 642 | "R_ARM_ROSEGREL32", /* name */ |
| 643 | FALSE, /* partial_inplace */ |
| 644 | 0xffffffff, /* src_mask */ |
| 645 | 0xffffffff, /* dst_mask */ |
| 646 | FALSE), /* pcrel_offset */ |
| 647 | |
| 648 | HOWTO (R_ARM_V4BX, /* type */ |
| 649 | 0, /* rightshift */ |
| 650 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 651 | 32, /* bitsize */ |
| 652 | FALSE, /* pc_relative */ |
| 653 | 0, /* bitpos */ |
| 654 | complain_overflow_dont,/* complain_on_overflow */ |
| 655 | bfd_elf_generic_reloc, /* special_function */ |
| 656 | "R_ARM_V4BX", /* name */ |
| 657 | FALSE, /* partial_inplace */ |
| 658 | 0xffffffff, /* src_mask */ |
| 659 | 0xffffffff, /* dst_mask */ |
| 660 | FALSE), /* pcrel_offset */ |
| 661 | |
| 662 | HOWTO (R_ARM_TARGET2, /* type */ |
| 663 | 0, /* rightshift */ |
| 664 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 665 | 32, /* bitsize */ |
| 666 | FALSE, /* pc_relative */ |
| 667 | 0, /* bitpos */ |
| 668 | complain_overflow_signed,/* complain_on_overflow */ |
| 669 | bfd_elf_generic_reloc, /* special_function */ |
| 670 | "R_ARM_TARGET2", /* name */ |
| 671 | FALSE, /* partial_inplace */ |
| 672 | 0xffffffff, /* src_mask */ |
| 673 | 0xffffffff, /* dst_mask */ |
| 674 | TRUE), /* pcrel_offset */ |
| 675 | |
| 676 | HOWTO (R_ARM_PREL31, /* type */ |
| 677 | 0, /* rightshift */ |
| 678 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 679 | 31, /* bitsize */ |
| 680 | TRUE, /* pc_relative */ |
| 681 | 0, /* bitpos */ |
| 682 | complain_overflow_signed,/* complain_on_overflow */ |
| 683 | bfd_elf_generic_reloc, /* special_function */ |
| 684 | "R_ARM_PREL31", /* name */ |
| 685 | FALSE, /* partial_inplace */ |
| 686 | 0x7fffffff, /* src_mask */ |
| 687 | 0x7fffffff, /* dst_mask */ |
| 688 | TRUE), /* pcrel_offset */ |
| 689 | |
| 690 | HOWTO (R_ARM_MOVW_ABS_NC, /* type */ |
| 691 | 0, /* rightshift */ |
| 692 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 693 | 16, /* bitsize */ |
| 694 | FALSE, /* pc_relative */ |
| 695 | 0, /* bitpos */ |
| 696 | complain_overflow_dont,/* complain_on_overflow */ |
| 697 | bfd_elf_generic_reloc, /* special_function */ |
| 698 | "R_ARM_MOVW_ABS_NC", /* name */ |
| 699 | FALSE, /* partial_inplace */ |
| 700 | 0x000f0fff, /* src_mask */ |
| 701 | 0x000f0fff, /* dst_mask */ |
| 702 | FALSE), /* pcrel_offset */ |
| 703 | |
| 704 | HOWTO (R_ARM_MOVT_ABS, /* type */ |
| 705 | 0, /* rightshift */ |
| 706 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 707 | 16, /* bitsize */ |
| 708 | FALSE, /* pc_relative */ |
| 709 | 0, /* bitpos */ |
| 710 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 711 | bfd_elf_generic_reloc, /* special_function */ |
| 712 | "R_ARM_MOVT_ABS", /* name */ |
| 713 | FALSE, /* partial_inplace */ |
| 714 | 0x000f0fff, /* src_mask */ |
| 715 | 0x000f0fff, /* dst_mask */ |
| 716 | FALSE), /* pcrel_offset */ |
| 717 | |
| 718 | HOWTO (R_ARM_MOVW_PREL_NC, /* type */ |
| 719 | 0, /* rightshift */ |
| 720 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 721 | 16, /* bitsize */ |
| 722 | TRUE, /* pc_relative */ |
| 723 | 0, /* bitpos */ |
| 724 | complain_overflow_dont,/* complain_on_overflow */ |
| 725 | bfd_elf_generic_reloc, /* special_function */ |
| 726 | "R_ARM_MOVW_PREL_NC", /* name */ |
| 727 | FALSE, /* partial_inplace */ |
| 728 | 0x000f0fff, /* src_mask */ |
| 729 | 0x000f0fff, /* dst_mask */ |
| 730 | TRUE), /* pcrel_offset */ |
| 731 | |
| 732 | HOWTO (R_ARM_MOVT_PREL, /* type */ |
| 733 | 0, /* rightshift */ |
| 734 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 735 | 16, /* bitsize */ |
| 736 | TRUE, /* pc_relative */ |
| 737 | 0, /* bitpos */ |
| 738 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 739 | bfd_elf_generic_reloc, /* special_function */ |
| 740 | "R_ARM_MOVT_PREL", /* name */ |
| 741 | FALSE, /* partial_inplace */ |
| 742 | 0x000f0fff, /* src_mask */ |
| 743 | 0x000f0fff, /* dst_mask */ |
| 744 | TRUE), /* pcrel_offset */ |
| 745 | |
| 746 | HOWTO (R_ARM_THM_MOVW_ABS_NC, /* type */ |
| 747 | 0, /* rightshift */ |
| 748 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 749 | 16, /* bitsize */ |
| 750 | FALSE, /* pc_relative */ |
| 751 | 0, /* bitpos */ |
| 752 | complain_overflow_dont,/* complain_on_overflow */ |
| 753 | bfd_elf_generic_reloc, /* special_function */ |
| 754 | "R_ARM_THM_MOVW_ABS_NC",/* name */ |
| 755 | FALSE, /* partial_inplace */ |
| 756 | 0x040f70ff, /* src_mask */ |
| 757 | 0x040f70ff, /* dst_mask */ |
| 758 | FALSE), /* pcrel_offset */ |
| 759 | |
| 760 | HOWTO (R_ARM_THM_MOVT_ABS, /* type */ |
| 761 | 0, /* rightshift */ |
| 762 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 763 | 16, /* bitsize */ |
| 764 | FALSE, /* pc_relative */ |
| 765 | 0, /* bitpos */ |
| 766 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 767 | bfd_elf_generic_reloc, /* special_function */ |
| 768 | "R_ARM_THM_MOVT_ABS", /* name */ |
| 769 | FALSE, /* partial_inplace */ |
| 770 | 0x040f70ff, /* src_mask */ |
| 771 | 0x040f70ff, /* dst_mask */ |
| 772 | FALSE), /* pcrel_offset */ |
| 773 | |
| 774 | HOWTO (R_ARM_THM_MOVW_PREL_NC,/* type */ |
| 775 | 0, /* rightshift */ |
| 776 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 777 | 16, /* bitsize */ |
| 778 | TRUE, /* pc_relative */ |
| 779 | 0, /* bitpos */ |
| 780 | complain_overflow_dont,/* complain_on_overflow */ |
| 781 | bfd_elf_generic_reloc, /* special_function */ |
| 782 | "R_ARM_THM_MOVW_PREL_NC",/* name */ |
| 783 | FALSE, /* partial_inplace */ |
| 784 | 0x040f70ff, /* src_mask */ |
| 785 | 0x040f70ff, /* dst_mask */ |
| 786 | TRUE), /* pcrel_offset */ |
| 787 | |
| 788 | HOWTO (R_ARM_THM_MOVT_PREL, /* type */ |
| 789 | 0, /* rightshift */ |
| 790 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 791 | 16, /* bitsize */ |
| 792 | TRUE, /* pc_relative */ |
| 793 | 0, /* bitpos */ |
| 794 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 795 | bfd_elf_generic_reloc, /* special_function */ |
| 796 | "R_ARM_THM_MOVT_PREL", /* name */ |
| 797 | FALSE, /* partial_inplace */ |
| 798 | 0x040f70ff, /* src_mask */ |
| 799 | 0x040f70ff, /* dst_mask */ |
| 800 | TRUE), /* pcrel_offset */ |
| 801 | |
| 802 | HOWTO (R_ARM_THM_JUMP19, /* type */ |
| 803 | 1, /* rightshift */ |
| 804 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 805 | 19, /* bitsize */ |
| 806 | TRUE, /* pc_relative */ |
| 807 | 0, /* bitpos */ |
| 808 | complain_overflow_signed,/* complain_on_overflow */ |
| 809 | bfd_elf_generic_reloc, /* special_function */ |
| 810 | "R_ARM_THM_JUMP19", /* name */ |
| 811 | FALSE, /* partial_inplace */ |
| 812 | 0x043f2fff, /* src_mask */ |
| 813 | 0x043f2fff, /* dst_mask */ |
| 814 | TRUE), /* pcrel_offset */ |
| 815 | |
| 816 | HOWTO (R_ARM_THM_JUMP6, /* type */ |
| 817 | 1, /* rightshift */ |
| 818 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 819 | 6, /* bitsize */ |
| 820 | TRUE, /* pc_relative */ |
| 821 | 0, /* bitpos */ |
| 822 | complain_overflow_unsigned,/* complain_on_overflow */ |
| 823 | bfd_elf_generic_reloc, /* special_function */ |
| 824 | "R_ARM_THM_JUMP6", /* name */ |
| 825 | FALSE, /* partial_inplace */ |
| 826 | 0x02f8, /* src_mask */ |
| 827 | 0x02f8, /* dst_mask */ |
| 828 | TRUE), /* pcrel_offset */ |
| 829 | |
| 830 | /* These are declared as 13-bit signed relocations because we can |
| 831 | address -4095 .. 4095(base) by altering ADDW to SUBW or vice |
| 832 | versa. */ |
| 833 | HOWTO (R_ARM_THM_ALU_PREL_11_0,/* type */ |
| 834 | 0, /* rightshift */ |
| 835 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 836 | 13, /* bitsize */ |
| 837 | TRUE, /* pc_relative */ |
| 838 | 0, /* bitpos */ |
| 839 | complain_overflow_dont,/* complain_on_overflow */ |
| 840 | bfd_elf_generic_reloc, /* special_function */ |
| 841 | "R_ARM_THM_ALU_PREL_11_0",/* name */ |
| 842 | FALSE, /* partial_inplace */ |
| 843 | 0xffffffff, /* src_mask */ |
| 844 | 0xffffffff, /* dst_mask */ |
| 845 | TRUE), /* pcrel_offset */ |
| 846 | |
| 847 | HOWTO (R_ARM_THM_PC12, /* type */ |
| 848 | 0, /* rightshift */ |
| 849 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 850 | 13, /* bitsize */ |
| 851 | TRUE, /* pc_relative */ |
| 852 | 0, /* bitpos */ |
| 853 | complain_overflow_dont,/* complain_on_overflow */ |
| 854 | bfd_elf_generic_reloc, /* special_function */ |
| 855 | "R_ARM_THM_PC12", /* name */ |
| 856 | FALSE, /* partial_inplace */ |
| 857 | 0xffffffff, /* src_mask */ |
| 858 | 0xffffffff, /* dst_mask */ |
| 859 | TRUE), /* pcrel_offset */ |
| 860 | |
| 861 | HOWTO (R_ARM_ABS32_NOI, /* type */ |
| 862 | 0, /* rightshift */ |
| 863 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 864 | 32, /* bitsize */ |
| 865 | FALSE, /* pc_relative */ |
| 866 | 0, /* bitpos */ |
| 867 | complain_overflow_dont,/* complain_on_overflow */ |
| 868 | bfd_elf_generic_reloc, /* special_function */ |
| 869 | "R_ARM_ABS32_NOI", /* name */ |
| 870 | FALSE, /* partial_inplace */ |
| 871 | 0xffffffff, /* src_mask */ |
| 872 | 0xffffffff, /* dst_mask */ |
| 873 | FALSE), /* pcrel_offset */ |
| 874 | |
| 875 | HOWTO (R_ARM_REL32_NOI, /* type */ |
| 876 | 0, /* rightshift */ |
| 877 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 878 | 32, /* bitsize */ |
| 879 | TRUE, /* pc_relative */ |
| 880 | 0, /* bitpos */ |
| 881 | complain_overflow_dont,/* complain_on_overflow */ |
| 882 | bfd_elf_generic_reloc, /* special_function */ |
| 883 | "R_ARM_REL32_NOI", /* name */ |
| 884 | FALSE, /* partial_inplace */ |
| 885 | 0xffffffff, /* src_mask */ |
| 886 | 0xffffffff, /* dst_mask */ |
| 887 | FALSE), /* pcrel_offset */ |
| 888 | |
| 889 | /* Group relocations. */ |
| 890 | |
| 891 | HOWTO (R_ARM_ALU_PC_G0_NC, /* type */ |
| 892 | 0, /* rightshift */ |
| 893 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 894 | 32, /* bitsize */ |
| 895 | TRUE, /* pc_relative */ |
| 896 | 0, /* bitpos */ |
| 897 | complain_overflow_dont,/* complain_on_overflow */ |
| 898 | bfd_elf_generic_reloc, /* special_function */ |
| 899 | "R_ARM_ALU_PC_G0_NC", /* name */ |
| 900 | FALSE, /* partial_inplace */ |
| 901 | 0xffffffff, /* src_mask */ |
| 902 | 0xffffffff, /* dst_mask */ |
| 903 | TRUE), /* pcrel_offset */ |
| 904 | |
| 905 | HOWTO (R_ARM_ALU_PC_G0, /* type */ |
| 906 | 0, /* rightshift */ |
| 907 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 908 | 32, /* bitsize */ |
| 909 | TRUE, /* pc_relative */ |
| 910 | 0, /* bitpos */ |
| 911 | complain_overflow_dont,/* complain_on_overflow */ |
| 912 | bfd_elf_generic_reloc, /* special_function */ |
| 913 | "R_ARM_ALU_PC_G0", /* name */ |
| 914 | FALSE, /* partial_inplace */ |
| 915 | 0xffffffff, /* src_mask */ |
| 916 | 0xffffffff, /* dst_mask */ |
| 917 | TRUE), /* pcrel_offset */ |
| 918 | |
| 919 | HOWTO (R_ARM_ALU_PC_G1_NC, /* type */ |
| 920 | 0, /* rightshift */ |
| 921 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 922 | 32, /* bitsize */ |
| 923 | TRUE, /* pc_relative */ |
| 924 | 0, /* bitpos */ |
| 925 | complain_overflow_dont,/* complain_on_overflow */ |
| 926 | bfd_elf_generic_reloc, /* special_function */ |
| 927 | "R_ARM_ALU_PC_G1_NC", /* name */ |
| 928 | FALSE, /* partial_inplace */ |
| 929 | 0xffffffff, /* src_mask */ |
| 930 | 0xffffffff, /* dst_mask */ |
| 931 | TRUE), /* pcrel_offset */ |
| 932 | |
| 933 | HOWTO (R_ARM_ALU_PC_G1, /* type */ |
| 934 | 0, /* rightshift */ |
| 935 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 936 | 32, /* bitsize */ |
| 937 | TRUE, /* pc_relative */ |
| 938 | 0, /* bitpos */ |
| 939 | complain_overflow_dont,/* complain_on_overflow */ |
| 940 | bfd_elf_generic_reloc, /* special_function */ |
| 941 | "R_ARM_ALU_PC_G1", /* name */ |
| 942 | FALSE, /* partial_inplace */ |
| 943 | 0xffffffff, /* src_mask */ |
| 944 | 0xffffffff, /* dst_mask */ |
| 945 | TRUE), /* pcrel_offset */ |
| 946 | |
| 947 | HOWTO (R_ARM_ALU_PC_G2, /* type */ |
| 948 | 0, /* rightshift */ |
| 949 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 950 | 32, /* bitsize */ |
| 951 | TRUE, /* pc_relative */ |
| 952 | 0, /* bitpos */ |
| 953 | complain_overflow_dont,/* complain_on_overflow */ |
| 954 | bfd_elf_generic_reloc, /* special_function */ |
| 955 | "R_ARM_ALU_PC_G2", /* name */ |
| 956 | FALSE, /* partial_inplace */ |
| 957 | 0xffffffff, /* src_mask */ |
| 958 | 0xffffffff, /* dst_mask */ |
| 959 | TRUE), /* pcrel_offset */ |
| 960 | |
| 961 | HOWTO (R_ARM_LDR_PC_G1, /* type */ |
| 962 | 0, /* rightshift */ |
| 963 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 964 | 32, /* bitsize */ |
| 965 | TRUE, /* pc_relative */ |
| 966 | 0, /* bitpos */ |
| 967 | complain_overflow_dont,/* complain_on_overflow */ |
| 968 | bfd_elf_generic_reloc, /* special_function */ |
| 969 | "R_ARM_LDR_PC_G1", /* name */ |
| 970 | FALSE, /* partial_inplace */ |
| 971 | 0xffffffff, /* src_mask */ |
| 972 | 0xffffffff, /* dst_mask */ |
| 973 | TRUE), /* pcrel_offset */ |
| 974 | |
| 975 | HOWTO (R_ARM_LDR_PC_G2, /* type */ |
| 976 | 0, /* rightshift */ |
| 977 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 978 | 32, /* bitsize */ |
| 979 | TRUE, /* pc_relative */ |
| 980 | 0, /* bitpos */ |
| 981 | complain_overflow_dont,/* complain_on_overflow */ |
| 982 | bfd_elf_generic_reloc, /* special_function */ |
| 983 | "R_ARM_LDR_PC_G2", /* name */ |
| 984 | FALSE, /* partial_inplace */ |
| 985 | 0xffffffff, /* src_mask */ |
| 986 | 0xffffffff, /* dst_mask */ |
| 987 | TRUE), /* pcrel_offset */ |
| 988 | |
| 989 | HOWTO (R_ARM_LDRS_PC_G0, /* type */ |
| 990 | 0, /* rightshift */ |
| 991 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 992 | 32, /* bitsize */ |
| 993 | TRUE, /* pc_relative */ |
| 994 | 0, /* bitpos */ |
| 995 | complain_overflow_dont,/* complain_on_overflow */ |
| 996 | bfd_elf_generic_reloc, /* special_function */ |
| 997 | "R_ARM_LDRS_PC_G0", /* name */ |
| 998 | FALSE, /* partial_inplace */ |
| 999 | 0xffffffff, /* src_mask */ |
| 1000 | 0xffffffff, /* dst_mask */ |
| 1001 | TRUE), /* pcrel_offset */ |
| 1002 | |
| 1003 | HOWTO (R_ARM_LDRS_PC_G1, /* type */ |
| 1004 | 0, /* rightshift */ |
| 1005 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1006 | 32, /* bitsize */ |
| 1007 | TRUE, /* pc_relative */ |
| 1008 | 0, /* bitpos */ |
| 1009 | complain_overflow_dont,/* complain_on_overflow */ |
| 1010 | bfd_elf_generic_reloc, /* special_function */ |
| 1011 | "R_ARM_LDRS_PC_G1", /* name */ |
| 1012 | FALSE, /* partial_inplace */ |
| 1013 | 0xffffffff, /* src_mask */ |
| 1014 | 0xffffffff, /* dst_mask */ |
| 1015 | TRUE), /* pcrel_offset */ |
| 1016 | |
| 1017 | HOWTO (R_ARM_LDRS_PC_G2, /* type */ |
| 1018 | 0, /* rightshift */ |
| 1019 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1020 | 32, /* bitsize */ |
| 1021 | TRUE, /* pc_relative */ |
| 1022 | 0, /* bitpos */ |
| 1023 | complain_overflow_dont,/* complain_on_overflow */ |
| 1024 | bfd_elf_generic_reloc, /* special_function */ |
| 1025 | "R_ARM_LDRS_PC_G2", /* name */ |
| 1026 | FALSE, /* partial_inplace */ |
| 1027 | 0xffffffff, /* src_mask */ |
| 1028 | 0xffffffff, /* dst_mask */ |
| 1029 | TRUE), /* pcrel_offset */ |
| 1030 | |
| 1031 | HOWTO (R_ARM_LDC_PC_G0, /* type */ |
| 1032 | 0, /* rightshift */ |
| 1033 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1034 | 32, /* bitsize */ |
| 1035 | TRUE, /* pc_relative */ |
| 1036 | 0, /* bitpos */ |
| 1037 | complain_overflow_dont,/* complain_on_overflow */ |
| 1038 | bfd_elf_generic_reloc, /* special_function */ |
| 1039 | "R_ARM_LDC_PC_G0", /* name */ |
| 1040 | FALSE, /* partial_inplace */ |
| 1041 | 0xffffffff, /* src_mask */ |
| 1042 | 0xffffffff, /* dst_mask */ |
| 1043 | TRUE), /* pcrel_offset */ |
| 1044 | |
| 1045 | HOWTO (R_ARM_LDC_PC_G1, /* type */ |
| 1046 | 0, /* rightshift */ |
| 1047 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1048 | 32, /* bitsize */ |
| 1049 | TRUE, /* pc_relative */ |
| 1050 | 0, /* bitpos */ |
| 1051 | complain_overflow_dont,/* complain_on_overflow */ |
| 1052 | bfd_elf_generic_reloc, /* special_function */ |
| 1053 | "R_ARM_LDC_PC_G1", /* name */ |
| 1054 | FALSE, /* partial_inplace */ |
| 1055 | 0xffffffff, /* src_mask */ |
| 1056 | 0xffffffff, /* dst_mask */ |
| 1057 | TRUE), /* pcrel_offset */ |
| 1058 | |
| 1059 | HOWTO (R_ARM_LDC_PC_G2, /* type */ |
| 1060 | 0, /* rightshift */ |
| 1061 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1062 | 32, /* bitsize */ |
| 1063 | TRUE, /* pc_relative */ |
| 1064 | 0, /* bitpos */ |
| 1065 | complain_overflow_dont,/* complain_on_overflow */ |
| 1066 | bfd_elf_generic_reloc, /* special_function */ |
| 1067 | "R_ARM_LDC_PC_G2", /* name */ |
| 1068 | FALSE, /* partial_inplace */ |
| 1069 | 0xffffffff, /* src_mask */ |
| 1070 | 0xffffffff, /* dst_mask */ |
| 1071 | TRUE), /* pcrel_offset */ |
| 1072 | |
| 1073 | HOWTO (R_ARM_ALU_SB_G0_NC, /* type */ |
| 1074 | 0, /* rightshift */ |
| 1075 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1076 | 32, /* bitsize */ |
| 1077 | TRUE, /* pc_relative */ |
| 1078 | 0, /* bitpos */ |
| 1079 | complain_overflow_dont,/* complain_on_overflow */ |
| 1080 | bfd_elf_generic_reloc, /* special_function */ |
| 1081 | "R_ARM_ALU_SB_G0_NC", /* name */ |
| 1082 | FALSE, /* partial_inplace */ |
| 1083 | 0xffffffff, /* src_mask */ |
| 1084 | 0xffffffff, /* dst_mask */ |
| 1085 | TRUE), /* pcrel_offset */ |
| 1086 | |
| 1087 | HOWTO (R_ARM_ALU_SB_G0, /* type */ |
| 1088 | 0, /* rightshift */ |
| 1089 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1090 | 32, /* bitsize */ |
| 1091 | TRUE, /* pc_relative */ |
| 1092 | 0, /* bitpos */ |
| 1093 | complain_overflow_dont,/* complain_on_overflow */ |
| 1094 | bfd_elf_generic_reloc, /* special_function */ |
| 1095 | "R_ARM_ALU_SB_G0", /* name */ |
| 1096 | FALSE, /* partial_inplace */ |
| 1097 | 0xffffffff, /* src_mask */ |
| 1098 | 0xffffffff, /* dst_mask */ |
| 1099 | TRUE), /* pcrel_offset */ |
| 1100 | |
| 1101 | HOWTO (R_ARM_ALU_SB_G1_NC, /* type */ |
| 1102 | 0, /* rightshift */ |
| 1103 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1104 | 32, /* bitsize */ |
| 1105 | TRUE, /* pc_relative */ |
| 1106 | 0, /* bitpos */ |
| 1107 | complain_overflow_dont,/* complain_on_overflow */ |
| 1108 | bfd_elf_generic_reloc, /* special_function */ |
| 1109 | "R_ARM_ALU_SB_G1_NC", /* name */ |
| 1110 | FALSE, /* partial_inplace */ |
| 1111 | 0xffffffff, /* src_mask */ |
| 1112 | 0xffffffff, /* dst_mask */ |
| 1113 | TRUE), /* pcrel_offset */ |
| 1114 | |
| 1115 | HOWTO (R_ARM_ALU_SB_G1, /* type */ |
| 1116 | 0, /* rightshift */ |
| 1117 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1118 | 32, /* bitsize */ |
| 1119 | TRUE, /* pc_relative */ |
| 1120 | 0, /* bitpos */ |
| 1121 | complain_overflow_dont,/* complain_on_overflow */ |
| 1122 | bfd_elf_generic_reloc, /* special_function */ |
| 1123 | "R_ARM_ALU_SB_G1", /* name */ |
| 1124 | FALSE, /* partial_inplace */ |
| 1125 | 0xffffffff, /* src_mask */ |
| 1126 | 0xffffffff, /* dst_mask */ |
| 1127 | TRUE), /* pcrel_offset */ |
| 1128 | |
| 1129 | HOWTO (R_ARM_ALU_SB_G2, /* type */ |
| 1130 | 0, /* rightshift */ |
| 1131 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1132 | 32, /* bitsize */ |
| 1133 | TRUE, /* pc_relative */ |
| 1134 | 0, /* bitpos */ |
| 1135 | complain_overflow_dont,/* complain_on_overflow */ |
| 1136 | bfd_elf_generic_reloc, /* special_function */ |
| 1137 | "R_ARM_ALU_SB_G2", /* name */ |
| 1138 | FALSE, /* partial_inplace */ |
| 1139 | 0xffffffff, /* src_mask */ |
| 1140 | 0xffffffff, /* dst_mask */ |
| 1141 | TRUE), /* pcrel_offset */ |
| 1142 | |
| 1143 | HOWTO (R_ARM_LDR_SB_G0, /* type */ |
| 1144 | 0, /* rightshift */ |
| 1145 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1146 | 32, /* bitsize */ |
| 1147 | TRUE, /* pc_relative */ |
| 1148 | 0, /* bitpos */ |
| 1149 | complain_overflow_dont,/* complain_on_overflow */ |
| 1150 | bfd_elf_generic_reloc, /* special_function */ |
| 1151 | "R_ARM_LDR_SB_G0", /* name */ |
| 1152 | FALSE, /* partial_inplace */ |
| 1153 | 0xffffffff, /* src_mask */ |
| 1154 | 0xffffffff, /* dst_mask */ |
| 1155 | TRUE), /* pcrel_offset */ |
| 1156 | |
| 1157 | HOWTO (R_ARM_LDR_SB_G1, /* type */ |
| 1158 | 0, /* rightshift */ |
| 1159 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1160 | 32, /* bitsize */ |
| 1161 | TRUE, /* pc_relative */ |
| 1162 | 0, /* bitpos */ |
| 1163 | complain_overflow_dont,/* complain_on_overflow */ |
| 1164 | bfd_elf_generic_reloc, /* special_function */ |
| 1165 | "R_ARM_LDR_SB_G1", /* name */ |
| 1166 | FALSE, /* partial_inplace */ |
| 1167 | 0xffffffff, /* src_mask */ |
| 1168 | 0xffffffff, /* dst_mask */ |
| 1169 | TRUE), /* pcrel_offset */ |
| 1170 | |
| 1171 | HOWTO (R_ARM_LDR_SB_G2, /* type */ |
| 1172 | 0, /* rightshift */ |
| 1173 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1174 | 32, /* bitsize */ |
| 1175 | TRUE, /* pc_relative */ |
| 1176 | 0, /* bitpos */ |
| 1177 | complain_overflow_dont,/* complain_on_overflow */ |
| 1178 | bfd_elf_generic_reloc, /* special_function */ |
| 1179 | "R_ARM_LDR_SB_G2", /* name */ |
| 1180 | FALSE, /* partial_inplace */ |
| 1181 | 0xffffffff, /* src_mask */ |
| 1182 | 0xffffffff, /* dst_mask */ |
| 1183 | TRUE), /* pcrel_offset */ |
| 1184 | |
| 1185 | HOWTO (R_ARM_LDRS_SB_G0, /* type */ |
| 1186 | 0, /* rightshift */ |
| 1187 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1188 | 32, /* bitsize */ |
| 1189 | TRUE, /* pc_relative */ |
| 1190 | 0, /* bitpos */ |
| 1191 | complain_overflow_dont,/* complain_on_overflow */ |
| 1192 | bfd_elf_generic_reloc, /* special_function */ |
| 1193 | "R_ARM_LDRS_SB_G0", /* name */ |
| 1194 | FALSE, /* partial_inplace */ |
| 1195 | 0xffffffff, /* src_mask */ |
| 1196 | 0xffffffff, /* dst_mask */ |
| 1197 | TRUE), /* pcrel_offset */ |
| 1198 | |
| 1199 | HOWTO (R_ARM_LDRS_SB_G1, /* type */ |
| 1200 | 0, /* rightshift */ |
| 1201 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1202 | 32, /* bitsize */ |
| 1203 | TRUE, /* pc_relative */ |
| 1204 | 0, /* bitpos */ |
| 1205 | complain_overflow_dont,/* complain_on_overflow */ |
| 1206 | bfd_elf_generic_reloc, /* special_function */ |
| 1207 | "R_ARM_LDRS_SB_G1", /* name */ |
| 1208 | FALSE, /* partial_inplace */ |
| 1209 | 0xffffffff, /* src_mask */ |
| 1210 | 0xffffffff, /* dst_mask */ |
| 1211 | TRUE), /* pcrel_offset */ |
| 1212 | |
| 1213 | HOWTO (R_ARM_LDRS_SB_G2, /* type */ |
| 1214 | 0, /* rightshift */ |
| 1215 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1216 | 32, /* bitsize */ |
| 1217 | TRUE, /* pc_relative */ |
| 1218 | 0, /* bitpos */ |
| 1219 | complain_overflow_dont,/* complain_on_overflow */ |
| 1220 | bfd_elf_generic_reloc, /* special_function */ |
| 1221 | "R_ARM_LDRS_SB_G2", /* name */ |
| 1222 | FALSE, /* partial_inplace */ |
| 1223 | 0xffffffff, /* src_mask */ |
| 1224 | 0xffffffff, /* dst_mask */ |
| 1225 | TRUE), /* pcrel_offset */ |
| 1226 | |
| 1227 | HOWTO (R_ARM_LDC_SB_G0, /* type */ |
| 1228 | 0, /* rightshift */ |
| 1229 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1230 | 32, /* bitsize */ |
| 1231 | TRUE, /* pc_relative */ |
| 1232 | 0, /* bitpos */ |
| 1233 | complain_overflow_dont,/* complain_on_overflow */ |
| 1234 | bfd_elf_generic_reloc, /* special_function */ |
| 1235 | "R_ARM_LDC_SB_G0", /* name */ |
| 1236 | FALSE, /* partial_inplace */ |
| 1237 | 0xffffffff, /* src_mask */ |
| 1238 | 0xffffffff, /* dst_mask */ |
| 1239 | TRUE), /* pcrel_offset */ |
| 1240 | |
| 1241 | HOWTO (R_ARM_LDC_SB_G1, /* type */ |
| 1242 | 0, /* rightshift */ |
| 1243 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1244 | 32, /* bitsize */ |
| 1245 | TRUE, /* pc_relative */ |
| 1246 | 0, /* bitpos */ |
| 1247 | complain_overflow_dont,/* complain_on_overflow */ |
| 1248 | bfd_elf_generic_reloc, /* special_function */ |
| 1249 | "R_ARM_LDC_SB_G1", /* name */ |
| 1250 | FALSE, /* partial_inplace */ |
| 1251 | 0xffffffff, /* src_mask */ |
| 1252 | 0xffffffff, /* dst_mask */ |
| 1253 | TRUE), /* pcrel_offset */ |
| 1254 | |
| 1255 | HOWTO (R_ARM_LDC_SB_G2, /* type */ |
| 1256 | 0, /* rightshift */ |
| 1257 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1258 | 32, /* bitsize */ |
| 1259 | TRUE, /* pc_relative */ |
| 1260 | 0, /* bitpos */ |
| 1261 | complain_overflow_dont,/* complain_on_overflow */ |
| 1262 | bfd_elf_generic_reloc, /* special_function */ |
| 1263 | "R_ARM_LDC_SB_G2", /* name */ |
| 1264 | FALSE, /* partial_inplace */ |
| 1265 | 0xffffffff, /* src_mask */ |
| 1266 | 0xffffffff, /* dst_mask */ |
| 1267 | TRUE), /* pcrel_offset */ |
| 1268 | |
| 1269 | /* End of group relocations. */ |
| 1270 | |
| 1271 | HOWTO (R_ARM_MOVW_BREL_NC, /* type */ |
| 1272 | 0, /* rightshift */ |
| 1273 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1274 | 16, /* bitsize */ |
| 1275 | FALSE, /* pc_relative */ |
| 1276 | 0, /* bitpos */ |
| 1277 | complain_overflow_dont,/* complain_on_overflow */ |
| 1278 | bfd_elf_generic_reloc, /* special_function */ |
| 1279 | "R_ARM_MOVW_BREL_NC", /* name */ |
| 1280 | FALSE, /* partial_inplace */ |
| 1281 | 0x0000ffff, /* src_mask */ |
| 1282 | 0x0000ffff, /* dst_mask */ |
| 1283 | FALSE), /* pcrel_offset */ |
| 1284 | |
| 1285 | HOWTO (R_ARM_MOVT_BREL, /* type */ |
| 1286 | 0, /* rightshift */ |
| 1287 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1288 | 16, /* bitsize */ |
| 1289 | FALSE, /* pc_relative */ |
| 1290 | 0, /* bitpos */ |
| 1291 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1292 | bfd_elf_generic_reloc, /* special_function */ |
| 1293 | "R_ARM_MOVT_BREL", /* name */ |
| 1294 | FALSE, /* partial_inplace */ |
| 1295 | 0x0000ffff, /* src_mask */ |
| 1296 | 0x0000ffff, /* dst_mask */ |
| 1297 | FALSE), /* pcrel_offset */ |
| 1298 | |
| 1299 | HOWTO (R_ARM_MOVW_BREL, /* type */ |
| 1300 | 0, /* rightshift */ |
| 1301 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1302 | 16, /* bitsize */ |
| 1303 | FALSE, /* pc_relative */ |
| 1304 | 0, /* bitpos */ |
| 1305 | complain_overflow_dont,/* complain_on_overflow */ |
| 1306 | bfd_elf_generic_reloc, /* special_function */ |
| 1307 | "R_ARM_MOVW_BREL", /* name */ |
| 1308 | FALSE, /* partial_inplace */ |
| 1309 | 0x0000ffff, /* src_mask */ |
| 1310 | 0x0000ffff, /* dst_mask */ |
| 1311 | FALSE), /* pcrel_offset */ |
| 1312 | |
| 1313 | HOWTO (R_ARM_THM_MOVW_BREL_NC,/* type */ |
| 1314 | 0, /* rightshift */ |
| 1315 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1316 | 16, /* bitsize */ |
| 1317 | FALSE, /* pc_relative */ |
| 1318 | 0, /* bitpos */ |
| 1319 | complain_overflow_dont,/* complain_on_overflow */ |
| 1320 | bfd_elf_generic_reloc, /* special_function */ |
| 1321 | "R_ARM_THM_MOVW_BREL_NC",/* name */ |
| 1322 | FALSE, /* partial_inplace */ |
| 1323 | 0x040f70ff, /* src_mask */ |
| 1324 | 0x040f70ff, /* dst_mask */ |
| 1325 | FALSE), /* pcrel_offset */ |
| 1326 | |
| 1327 | HOWTO (R_ARM_THM_MOVT_BREL, /* type */ |
| 1328 | 0, /* rightshift */ |
| 1329 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1330 | 16, /* bitsize */ |
| 1331 | FALSE, /* pc_relative */ |
| 1332 | 0, /* bitpos */ |
| 1333 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1334 | bfd_elf_generic_reloc, /* special_function */ |
| 1335 | "R_ARM_THM_MOVT_BREL", /* name */ |
| 1336 | FALSE, /* partial_inplace */ |
| 1337 | 0x040f70ff, /* src_mask */ |
| 1338 | 0x040f70ff, /* dst_mask */ |
| 1339 | FALSE), /* pcrel_offset */ |
| 1340 | |
| 1341 | HOWTO (R_ARM_THM_MOVW_BREL, /* type */ |
| 1342 | 0, /* rightshift */ |
| 1343 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1344 | 16, /* bitsize */ |
| 1345 | FALSE, /* pc_relative */ |
| 1346 | 0, /* bitpos */ |
| 1347 | complain_overflow_dont,/* complain_on_overflow */ |
| 1348 | bfd_elf_generic_reloc, /* special_function */ |
| 1349 | "R_ARM_THM_MOVW_BREL", /* name */ |
| 1350 | FALSE, /* partial_inplace */ |
| 1351 | 0x040f70ff, /* src_mask */ |
| 1352 | 0x040f70ff, /* dst_mask */ |
| 1353 | FALSE), /* pcrel_offset */ |
| 1354 | |
| 1355 | EMPTY_HOWTO (90), /* Unallocated. */ |
| 1356 | EMPTY_HOWTO (91), |
| 1357 | EMPTY_HOWTO (92), |
| 1358 | EMPTY_HOWTO (93), |
| 1359 | |
| 1360 | HOWTO (R_ARM_PLT32_ABS, /* type */ |
| 1361 | 0, /* rightshift */ |
| 1362 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1363 | 32, /* bitsize */ |
| 1364 | FALSE, /* pc_relative */ |
| 1365 | 0, /* bitpos */ |
| 1366 | complain_overflow_dont,/* complain_on_overflow */ |
| 1367 | bfd_elf_generic_reloc, /* special_function */ |
| 1368 | "R_ARM_PLT32_ABS", /* name */ |
| 1369 | FALSE, /* partial_inplace */ |
| 1370 | 0xffffffff, /* src_mask */ |
| 1371 | 0xffffffff, /* dst_mask */ |
| 1372 | FALSE), /* pcrel_offset */ |
| 1373 | |
| 1374 | HOWTO (R_ARM_GOT_ABS, /* type */ |
| 1375 | 0, /* rightshift */ |
| 1376 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1377 | 32, /* bitsize */ |
| 1378 | FALSE, /* pc_relative */ |
| 1379 | 0, /* bitpos */ |
| 1380 | complain_overflow_dont,/* complain_on_overflow */ |
| 1381 | bfd_elf_generic_reloc, /* special_function */ |
| 1382 | "R_ARM_GOT_ABS", /* name */ |
| 1383 | FALSE, /* partial_inplace */ |
| 1384 | 0xffffffff, /* src_mask */ |
| 1385 | 0xffffffff, /* dst_mask */ |
| 1386 | FALSE), /* pcrel_offset */ |
| 1387 | |
| 1388 | HOWTO (R_ARM_GOT_PREL, /* type */ |
| 1389 | 0, /* rightshift */ |
| 1390 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1391 | 32, /* bitsize */ |
| 1392 | TRUE, /* pc_relative */ |
| 1393 | 0, /* bitpos */ |
| 1394 | complain_overflow_dont, /* complain_on_overflow */ |
| 1395 | bfd_elf_generic_reloc, /* special_function */ |
| 1396 | "R_ARM_GOT_PREL", /* name */ |
| 1397 | FALSE, /* partial_inplace */ |
| 1398 | 0xffffffff, /* src_mask */ |
| 1399 | 0xffffffff, /* dst_mask */ |
| 1400 | TRUE), /* pcrel_offset */ |
| 1401 | |
| 1402 | HOWTO (R_ARM_GOT_BREL12, /* type */ |
| 1403 | 0, /* rightshift */ |
| 1404 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1405 | 12, /* bitsize */ |
| 1406 | FALSE, /* pc_relative */ |
| 1407 | 0, /* bitpos */ |
| 1408 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1409 | bfd_elf_generic_reloc, /* special_function */ |
| 1410 | "R_ARM_GOT_BREL12", /* name */ |
| 1411 | FALSE, /* partial_inplace */ |
| 1412 | 0x00000fff, /* src_mask */ |
| 1413 | 0x00000fff, /* dst_mask */ |
| 1414 | FALSE), /* pcrel_offset */ |
| 1415 | |
| 1416 | HOWTO (R_ARM_GOTOFF12, /* type */ |
| 1417 | 0, /* rightshift */ |
| 1418 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1419 | 12, /* bitsize */ |
| 1420 | FALSE, /* pc_relative */ |
| 1421 | 0, /* bitpos */ |
| 1422 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1423 | bfd_elf_generic_reloc, /* special_function */ |
| 1424 | "R_ARM_GOTOFF12", /* name */ |
| 1425 | FALSE, /* partial_inplace */ |
| 1426 | 0x00000fff, /* src_mask */ |
| 1427 | 0x00000fff, /* dst_mask */ |
| 1428 | FALSE), /* pcrel_offset */ |
| 1429 | |
| 1430 | EMPTY_HOWTO (R_ARM_GOTRELAX), /* reserved for future GOT-load optimizations */ |
| 1431 | |
| 1432 | /* GNU extension to record C++ vtable member usage */ |
| 1433 | HOWTO (R_ARM_GNU_VTENTRY, /* type */ |
| 1434 | 0, /* rightshift */ |
| 1435 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1436 | 0, /* bitsize */ |
| 1437 | FALSE, /* pc_relative */ |
| 1438 | 0, /* bitpos */ |
| 1439 | complain_overflow_dont, /* complain_on_overflow */ |
| 1440 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 1441 | "R_ARM_GNU_VTENTRY", /* name */ |
| 1442 | FALSE, /* partial_inplace */ |
| 1443 | 0, /* src_mask */ |
| 1444 | 0, /* dst_mask */ |
| 1445 | FALSE), /* pcrel_offset */ |
| 1446 | |
| 1447 | /* GNU extension to record C++ vtable hierarchy */ |
| 1448 | HOWTO (R_ARM_GNU_VTINHERIT, /* type */ |
| 1449 | 0, /* rightshift */ |
| 1450 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1451 | 0, /* bitsize */ |
| 1452 | FALSE, /* pc_relative */ |
| 1453 | 0, /* bitpos */ |
| 1454 | complain_overflow_dont, /* complain_on_overflow */ |
| 1455 | NULL, /* special_function */ |
| 1456 | "R_ARM_GNU_VTINHERIT", /* name */ |
| 1457 | FALSE, /* partial_inplace */ |
| 1458 | 0, /* src_mask */ |
| 1459 | 0, /* dst_mask */ |
| 1460 | FALSE), /* pcrel_offset */ |
| 1461 | |
| 1462 | HOWTO (R_ARM_THM_JUMP11, /* type */ |
| 1463 | 1, /* rightshift */ |
| 1464 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1465 | 11, /* bitsize */ |
| 1466 | TRUE, /* pc_relative */ |
| 1467 | 0, /* bitpos */ |
| 1468 | complain_overflow_signed, /* complain_on_overflow */ |
| 1469 | bfd_elf_generic_reloc, /* special_function */ |
| 1470 | "R_ARM_THM_JUMP11", /* name */ |
| 1471 | FALSE, /* partial_inplace */ |
| 1472 | 0x000007ff, /* src_mask */ |
| 1473 | 0x000007ff, /* dst_mask */ |
| 1474 | TRUE), /* pcrel_offset */ |
| 1475 | |
| 1476 | HOWTO (R_ARM_THM_JUMP8, /* type */ |
| 1477 | 1, /* rightshift */ |
| 1478 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1479 | 8, /* bitsize */ |
| 1480 | TRUE, /* pc_relative */ |
| 1481 | 0, /* bitpos */ |
| 1482 | complain_overflow_signed, /* complain_on_overflow */ |
| 1483 | bfd_elf_generic_reloc, /* special_function */ |
| 1484 | "R_ARM_THM_JUMP8", /* name */ |
| 1485 | FALSE, /* partial_inplace */ |
| 1486 | 0x000000ff, /* src_mask */ |
| 1487 | 0x000000ff, /* dst_mask */ |
| 1488 | TRUE), /* pcrel_offset */ |
| 1489 | |
| 1490 | /* TLS relocations */ |
| 1491 | HOWTO (R_ARM_TLS_GD32, /* type */ |
| 1492 | 0, /* rightshift */ |
| 1493 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1494 | 32, /* bitsize */ |
| 1495 | FALSE, /* pc_relative */ |
| 1496 | 0, /* bitpos */ |
| 1497 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1498 | NULL, /* special_function */ |
| 1499 | "R_ARM_TLS_GD32", /* name */ |
| 1500 | TRUE, /* partial_inplace */ |
| 1501 | 0xffffffff, /* src_mask */ |
| 1502 | 0xffffffff, /* dst_mask */ |
| 1503 | FALSE), /* pcrel_offset */ |
| 1504 | |
| 1505 | HOWTO (R_ARM_TLS_LDM32, /* type */ |
| 1506 | 0, /* rightshift */ |
| 1507 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1508 | 32, /* bitsize */ |
| 1509 | FALSE, /* pc_relative */ |
| 1510 | 0, /* bitpos */ |
| 1511 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1512 | bfd_elf_generic_reloc, /* special_function */ |
| 1513 | "R_ARM_TLS_LDM32", /* name */ |
| 1514 | TRUE, /* partial_inplace */ |
| 1515 | 0xffffffff, /* src_mask */ |
| 1516 | 0xffffffff, /* dst_mask */ |
| 1517 | FALSE), /* pcrel_offset */ |
| 1518 | |
| 1519 | HOWTO (R_ARM_TLS_LDO32, /* type */ |
| 1520 | 0, /* rightshift */ |
| 1521 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1522 | 32, /* bitsize */ |
| 1523 | FALSE, /* pc_relative */ |
| 1524 | 0, /* bitpos */ |
| 1525 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1526 | bfd_elf_generic_reloc, /* special_function */ |
| 1527 | "R_ARM_TLS_LDO32", /* name */ |
| 1528 | TRUE, /* partial_inplace */ |
| 1529 | 0xffffffff, /* src_mask */ |
| 1530 | 0xffffffff, /* dst_mask */ |
| 1531 | FALSE), /* pcrel_offset */ |
| 1532 | |
| 1533 | HOWTO (R_ARM_TLS_IE32, /* type */ |
| 1534 | 0, /* rightshift */ |
| 1535 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1536 | 32, /* bitsize */ |
| 1537 | FALSE, /* pc_relative */ |
| 1538 | 0, /* bitpos */ |
| 1539 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1540 | NULL, /* special_function */ |
| 1541 | "R_ARM_TLS_IE32", /* name */ |
| 1542 | TRUE, /* partial_inplace */ |
| 1543 | 0xffffffff, /* src_mask */ |
| 1544 | 0xffffffff, /* dst_mask */ |
| 1545 | FALSE), /* pcrel_offset */ |
| 1546 | |
| 1547 | HOWTO (R_ARM_TLS_LE32, /* type */ |
| 1548 | 0, /* rightshift */ |
| 1549 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1550 | 32, /* bitsize */ |
| 1551 | FALSE, /* pc_relative */ |
| 1552 | 0, /* bitpos */ |
| 1553 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1554 | bfd_elf_generic_reloc, /* special_function */ |
| 1555 | "R_ARM_TLS_LE32", /* name */ |
| 1556 | TRUE, /* partial_inplace */ |
| 1557 | 0xffffffff, /* src_mask */ |
| 1558 | 0xffffffff, /* dst_mask */ |
| 1559 | FALSE), /* pcrel_offset */ |
| 1560 | |
| 1561 | HOWTO (R_ARM_TLS_LDO12, /* type */ |
| 1562 | 0, /* rightshift */ |
| 1563 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1564 | 12, /* bitsize */ |
| 1565 | FALSE, /* pc_relative */ |
| 1566 | 0, /* bitpos */ |
| 1567 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1568 | bfd_elf_generic_reloc, /* special_function */ |
| 1569 | "R_ARM_TLS_LDO12", /* name */ |
| 1570 | FALSE, /* partial_inplace */ |
| 1571 | 0x00000fff, /* src_mask */ |
| 1572 | 0x00000fff, /* dst_mask */ |
| 1573 | FALSE), /* pcrel_offset */ |
| 1574 | |
| 1575 | HOWTO (R_ARM_TLS_LE12, /* type */ |
| 1576 | 0, /* rightshift */ |
| 1577 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1578 | 12, /* bitsize */ |
| 1579 | FALSE, /* pc_relative */ |
| 1580 | 0, /* bitpos */ |
| 1581 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1582 | bfd_elf_generic_reloc, /* special_function */ |
| 1583 | "R_ARM_TLS_LE12", /* name */ |
| 1584 | FALSE, /* partial_inplace */ |
| 1585 | 0x00000fff, /* src_mask */ |
| 1586 | 0x00000fff, /* dst_mask */ |
| 1587 | FALSE), /* pcrel_offset */ |
| 1588 | |
| 1589 | HOWTO (R_ARM_TLS_IE12GP, /* type */ |
| 1590 | 0, /* rightshift */ |
| 1591 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1592 | 12, /* bitsize */ |
| 1593 | FALSE, /* pc_relative */ |
| 1594 | 0, /* bitpos */ |
| 1595 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 1596 | bfd_elf_generic_reloc, /* special_function */ |
| 1597 | "R_ARM_TLS_IE12GP", /* name */ |
| 1598 | FALSE, /* partial_inplace */ |
| 1599 | 0x00000fff, /* src_mask */ |
| 1600 | 0x00000fff, /* dst_mask */ |
| 1601 | FALSE), /* pcrel_offset */ |
| 1602 | }; |
| 1603 | |
| 1604 | /* 112-127 private relocations |
| 1605 | 128 R_ARM_ME_TOO, obsolete |
| 1606 | 129-255 unallocated in AAELF. |
| 1607 | |
| 1608 | 249-255 extended, currently unused, relocations: */ |
| 1609 | |
| 1610 | static reloc_howto_type elf32_arm_howto_table_2[4] = |
| 1611 | { |
| 1612 | HOWTO (R_ARM_RREL32, /* type */ |
| 1613 | 0, /* rightshift */ |
| 1614 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1615 | 0, /* bitsize */ |
| 1616 | FALSE, /* pc_relative */ |
| 1617 | 0, /* bitpos */ |
| 1618 | complain_overflow_dont,/* complain_on_overflow */ |
| 1619 | bfd_elf_generic_reloc, /* special_function */ |
| 1620 | "R_ARM_RREL32", /* name */ |
| 1621 | FALSE, /* partial_inplace */ |
| 1622 | 0, /* src_mask */ |
| 1623 | 0, /* dst_mask */ |
| 1624 | FALSE), /* pcrel_offset */ |
| 1625 | |
| 1626 | HOWTO (R_ARM_RABS32, /* type */ |
| 1627 | 0, /* rightshift */ |
| 1628 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1629 | 0, /* bitsize */ |
| 1630 | FALSE, /* pc_relative */ |
| 1631 | 0, /* bitpos */ |
| 1632 | complain_overflow_dont,/* complain_on_overflow */ |
| 1633 | bfd_elf_generic_reloc, /* special_function */ |
| 1634 | "R_ARM_RABS32", /* name */ |
| 1635 | FALSE, /* partial_inplace */ |
| 1636 | 0, /* src_mask */ |
| 1637 | 0, /* dst_mask */ |
| 1638 | FALSE), /* pcrel_offset */ |
| 1639 | |
| 1640 | HOWTO (R_ARM_RPC24, /* type */ |
| 1641 | 0, /* rightshift */ |
| 1642 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1643 | 0, /* bitsize */ |
| 1644 | FALSE, /* pc_relative */ |
| 1645 | 0, /* bitpos */ |
| 1646 | complain_overflow_dont,/* complain_on_overflow */ |
| 1647 | bfd_elf_generic_reloc, /* special_function */ |
| 1648 | "R_ARM_RPC24", /* name */ |
| 1649 | FALSE, /* partial_inplace */ |
| 1650 | 0, /* src_mask */ |
| 1651 | 0, /* dst_mask */ |
| 1652 | FALSE), /* pcrel_offset */ |
| 1653 | |
| 1654 | HOWTO (R_ARM_RBASE, /* type */ |
| 1655 | 0, /* rightshift */ |
| 1656 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 1657 | 0, /* bitsize */ |
| 1658 | FALSE, /* pc_relative */ |
| 1659 | 0, /* bitpos */ |
| 1660 | complain_overflow_dont,/* complain_on_overflow */ |
| 1661 | bfd_elf_generic_reloc, /* special_function */ |
| 1662 | "R_ARM_RBASE", /* name */ |
| 1663 | FALSE, /* partial_inplace */ |
| 1664 | 0, /* src_mask */ |
| 1665 | 0, /* dst_mask */ |
| 1666 | FALSE) /* pcrel_offset */ |
| 1667 | }; |
| 1668 | |
| 1669 | static reloc_howto_type * |
| 1670 | elf32_arm_howto_from_type (unsigned int r_type) |
| 1671 | { |
| 1672 | if (r_type < ARRAY_SIZE (elf32_arm_howto_table_1)) |
| 1673 | return &elf32_arm_howto_table_1[r_type]; |
| 1674 | |
| 1675 | if (r_type >= R_ARM_RREL32 |
| 1676 | && r_type < R_ARM_RREL32 + ARRAY_SIZE (elf32_arm_howto_table_2)) |
| 1677 | return &elf32_arm_howto_table_2[r_type - R_ARM_RREL32]; |
| 1678 | |
| 1679 | return NULL; |
| 1680 | } |
| 1681 | |
| 1682 | static void |
| 1683 | elf32_arm_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED, arelent * bfd_reloc, |
| 1684 | Elf_Internal_Rela * elf_reloc) |
| 1685 | { |
| 1686 | unsigned int r_type; |
| 1687 | |
| 1688 | r_type = ELF32_R_TYPE (elf_reloc->r_info); |
| 1689 | bfd_reloc->howto = elf32_arm_howto_from_type (r_type); |
| 1690 | } |
| 1691 | |
| 1692 | struct elf32_arm_reloc_map |
| 1693 | { |
| 1694 | bfd_reloc_code_real_type bfd_reloc_val; |
| 1695 | unsigned char elf_reloc_val; |
| 1696 | }; |
| 1697 | |
| 1698 | /* All entries in this list must also be present in elf32_arm_howto_table. */ |
| 1699 | static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = |
| 1700 | { |
| 1701 | {BFD_RELOC_NONE, R_ARM_NONE}, |
| 1702 | {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24}, |
| 1703 | {BFD_RELOC_ARM_PCREL_CALL, R_ARM_CALL}, |
| 1704 | {BFD_RELOC_ARM_PCREL_JUMP, R_ARM_JUMP24}, |
| 1705 | {BFD_RELOC_ARM_PCREL_BLX, R_ARM_XPC25}, |
| 1706 | {BFD_RELOC_THUMB_PCREL_BLX, R_ARM_THM_XPC22}, |
| 1707 | {BFD_RELOC_32, R_ARM_ABS32}, |
| 1708 | {BFD_RELOC_32_PCREL, R_ARM_REL32}, |
| 1709 | {BFD_RELOC_8, R_ARM_ABS8}, |
| 1710 | {BFD_RELOC_16, R_ARM_ABS16}, |
| 1711 | {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12}, |
| 1712 | {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5}, |
| 1713 | {BFD_RELOC_THUMB_PCREL_BRANCH25, R_ARM_THM_JUMP24}, |
| 1714 | {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_CALL}, |
| 1715 | {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_JUMP11}, |
| 1716 | {BFD_RELOC_THUMB_PCREL_BRANCH20, R_ARM_THM_JUMP19}, |
| 1717 | {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_JUMP8}, |
| 1718 | {BFD_RELOC_THUMB_PCREL_BRANCH7, R_ARM_THM_JUMP6}, |
| 1719 | {BFD_RELOC_ARM_GLOB_DAT, R_ARM_GLOB_DAT}, |
| 1720 | {BFD_RELOC_ARM_JUMP_SLOT, R_ARM_JUMP_SLOT}, |
| 1721 | {BFD_RELOC_ARM_RELATIVE, R_ARM_RELATIVE}, |
| 1722 | {BFD_RELOC_ARM_GOTOFF, R_ARM_GOTOFF32}, |
| 1723 | {BFD_RELOC_ARM_GOTPC, R_ARM_GOTPC}, |
| 1724 | {BFD_RELOC_ARM_GOT_PREL, R_ARM_GOT_PREL}, |
| 1725 | {BFD_RELOC_ARM_GOT32, R_ARM_GOT32}, |
| 1726 | {BFD_RELOC_ARM_PLT32, R_ARM_PLT32}, |
| 1727 | {BFD_RELOC_ARM_TARGET1, R_ARM_TARGET1}, |
| 1728 | {BFD_RELOC_ARM_ROSEGREL32, R_ARM_ROSEGREL32}, |
| 1729 | {BFD_RELOC_ARM_SBREL32, R_ARM_SBREL32}, |
| 1730 | {BFD_RELOC_ARM_PREL31, R_ARM_PREL31}, |
| 1731 | {BFD_RELOC_ARM_TARGET2, R_ARM_TARGET2}, |
| 1732 | {BFD_RELOC_ARM_PLT32, R_ARM_PLT32}, |
| 1733 | {BFD_RELOC_ARM_TLS_GD32, R_ARM_TLS_GD32}, |
| 1734 | {BFD_RELOC_ARM_TLS_LDO32, R_ARM_TLS_LDO32}, |
| 1735 | {BFD_RELOC_ARM_TLS_LDM32, R_ARM_TLS_LDM32}, |
| 1736 | {BFD_RELOC_ARM_TLS_DTPMOD32, R_ARM_TLS_DTPMOD32}, |
| 1737 | {BFD_RELOC_ARM_TLS_DTPOFF32, R_ARM_TLS_DTPOFF32}, |
| 1738 | {BFD_RELOC_ARM_TLS_TPOFF32, R_ARM_TLS_TPOFF32}, |
| 1739 | {BFD_RELOC_ARM_TLS_IE32, R_ARM_TLS_IE32}, |
| 1740 | {BFD_RELOC_ARM_TLS_LE32, R_ARM_TLS_LE32}, |
| 1741 | {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT}, |
| 1742 | {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY}, |
| 1743 | {BFD_RELOC_ARM_MOVW, R_ARM_MOVW_ABS_NC}, |
| 1744 | {BFD_RELOC_ARM_MOVT, R_ARM_MOVT_ABS}, |
| 1745 | {BFD_RELOC_ARM_MOVW_PCREL, R_ARM_MOVW_PREL_NC}, |
| 1746 | {BFD_RELOC_ARM_MOVT_PCREL, R_ARM_MOVT_PREL}, |
| 1747 | {BFD_RELOC_ARM_THUMB_MOVW, R_ARM_THM_MOVW_ABS_NC}, |
| 1748 | {BFD_RELOC_ARM_THUMB_MOVT, R_ARM_THM_MOVT_ABS}, |
| 1749 | {BFD_RELOC_ARM_THUMB_MOVW_PCREL, R_ARM_THM_MOVW_PREL_NC}, |
| 1750 | {BFD_RELOC_ARM_THUMB_MOVT_PCREL, R_ARM_THM_MOVT_PREL}, |
| 1751 | {BFD_RELOC_ARM_ALU_PC_G0_NC, R_ARM_ALU_PC_G0_NC}, |
| 1752 | {BFD_RELOC_ARM_ALU_PC_G0, R_ARM_ALU_PC_G0}, |
| 1753 | {BFD_RELOC_ARM_ALU_PC_G1_NC, R_ARM_ALU_PC_G1_NC}, |
| 1754 | {BFD_RELOC_ARM_ALU_PC_G1, R_ARM_ALU_PC_G1}, |
| 1755 | {BFD_RELOC_ARM_ALU_PC_G2, R_ARM_ALU_PC_G2}, |
| 1756 | {BFD_RELOC_ARM_LDR_PC_G0, R_ARM_LDR_PC_G0}, |
| 1757 | {BFD_RELOC_ARM_LDR_PC_G1, R_ARM_LDR_PC_G1}, |
| 1758 | {BFD_RELOC_ARM_LDR_PC_G2, R_ARM_LDR_PC_G2}, |
| 1759 | {BFD_RELOC_ARM_LDRS_PC_G0, R_ARM_LDRS_PC_G0}, |
| 1760 | {BFD_RELOC_ARM_LDRS_PC_G1, R_ARM_LDRS_PC_G1}, |
| 1761 | {BFD_RELOC_ARM_LDRS_PC_G2, R_ARM_LDRS_PC_G2}, |
| 1762 | {BFD_RELOC_ARM_LDC_PC_G0, R_ARM_LDC_PC_G0}, |
| 1763 | {BFD_RELOC_ARM_LDC_PC_G1, R_ARM_LDC_PC_G1}, |
| 1764 | {BFD_RELOC_ARM_LDC_PC_G2, R_ARM_LDC_PC_G2}, |
| 1765 | {BFD_RELOC_ARM_ALU_SB_G0_NC, R_ARM_ALU_SB_G0_NC}, |
| 1766 | {BFD_RELOC_ARM_ALU_SB_G0, R_ARM_ALU_SB_G0}, |
| 1767 | {BFD_RELOC_ARM_ALU_SB_G1_NC, R_ARM_ALU_SB_G1_NC}, |
| 1768 | {BFD_RELOC_ARM_ALU_SB_G1, R_ARM_ALU_SB_G1}, |
| 1769 | {BFD_RELOC_ARM_ALU_SB_G2, R_ARM_ALU_SB_G2}, |
| 1770 | {BFD_RELOC_ARM_LDR_SB_G0, R_ARM_LDR_SB_G0}, |
| 1771 | {BFD_RELOC_ARM_LDR_SB_G1, R_ARM_LDR_SB_G1}, |
| 1772 | {BFD_RELOC_ARM_LDR_SB_G2, R_ARM_LDR_SB_G2}, |
| 1773 | {BFD_RELOC_ARM_LDRS_SB_G0, R_ARM_LDRS_SB_G0}, |
| 1774 | {BFD_RELOC_ARM_LDRS_SB_G1, R_ARM_LDRS_SB_G1}, |
| 1775 | {BFD_RELOC_ARM_LDRS_SB_G2, R_ARM_LDRS_SB_G2}, |
| 1776 | {BFD_RELOC_ARM_LDC_SB_G0, R_ARM_LDC_SB_G0}, |
| 1777 | {BFD_RELOC_ARM_LDC_SB_G1, R_ARM_LDC_SB_G1}, |
| 1778 | {BFD_RELOC_ARM_LDC_SB_G2, R_ARM_LDC_SB_G2}, |
| 1779 | {BFD_RELOC_ARM_V4BX, R_ARM_V4BX} |
| 1780 | }; |
| 1781 | |
| 1782 | static reloc_howto_type * |
| 1783 | elf32_arm_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1784 | bfd_reloc_code_real_type code) |
| 1785 | { |
| 1786 | unsigned int i; |
| 1787 | |
| 1788 | for (i = 0; i < ARRAY_SIZE (elf32_arm_reloc_map); i ++) |
| 1789 | if (elf32_arm_reloc_map[i].bfd_reloc_val == code) |
| 1790 | return elf32_arm_howto_from_type (elf32_arm_reloc_map[i].elf_reloc_val); |
| 1791 | |
| 1792 | return NULL; |
| 1793 | } |
| 1794 | |
| 1795 | static reloc_howto_type * |
| 1796 | elf32_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 1797 | const char *r_name) |
| 1798 | { |
| 1799 | unsigned int i; |
| 1800 | |
| 1801 | for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_1); i++) |
| 1802 | if (elf32_arm_howto_table_1[i].name != NULL |
| 1803 | && strcasecmp (elf32_arm_howto_table_1[i].name, r_name) == 0) |
| 1804 | return &elf32_arm_howto_table_1[i]; |
| 1805 | |
| 1806 | for (i = 0; i < ARRAY_SIZE (elf32_arm_howto_table_2); i++) |
| 1807 | if (elf32_arm_howto_table_2[i].name != NULL |
| 1808 | && strcasecmp (elf32_arm_howto_table_2[i].name, r_name) == 0) |
| 1809 | return &elf32_arm_howto_table_2[i]; |
| 1810 | |
| 1811 | return NULL; |
| 1812 | } |
| 1813 | |
| 1814 | /* Support for core dump NOTE sections. */ |
| 1815 | |
| 1816 | static bfd_boolean |
| 1817 | elf32_arm_nabi_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 1818 | { |
| 1819 | int offset; |
| 1820 | size_t size; |
| 1821 | |
| 1822 | switch (note->descsz) |
| 1823 | { |
| 1824 | default: |
| 1825 | return FALSE; |
| 1826 | |
| 1827 | case 148: /* Linux/ARM 32-bit. */ |
| 1828 | /* pr_cursig */ |
| 1829 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); |
| 1830 | |
| 1831 | /* pr_pid */ |
| 1832 | elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24); |
| 1833 | |
| 1834 | /* pr_reg */ |
| 1835 | offset = 72; |
| 1836 | size = 72; |
| 1837 | |
| 1838 | break; |
| 1839 | } |
| 1840 | |
| 1841 | /* Make a ".reg/999" section. */ |
| 1842 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 1843 | size, note->descpos + offset); |
| 1844 | } |
| 1845 | |
| 1846 | static bfd_boolean |
| 1847 | elf32_arm_nabi_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 1848 | { |
| 1849 | switch (note->descsz) |
| 1850 | { |
| 1851 | default: |
| 1852 | return FALSE; |
| 1853 | |
| 1854 | case 124: /* Linux/ARM elf_prpsinfo. */ |
| 1855 | elf_tdata (abfd)->core_program |
| 1856 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| 1857 | elf_tdata (abfd)->core_command |
| 1858 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| 1859 | } |
| 1860 | |
| 1861 | /* Note that for some reason, a spurious space is tacked |
| 1862 | onto the end of the args in some (at least one anyway) |
| 1863 | implementations, so strip it off if it exists. */ |
| 1864 | { |
| 1865 | char *command = elf_tdata (abfd)->core_command; |
| 1866 | int n = strlen (command); |
| 1867 | |
| 1868 | if (0 < n && command[n - 1] == ' ') |
| 1869 | command[n - 1] = '\0'; |
| 1870 | } |
| 1871 | |
| 1872 | return TRUE; |
| 1873 | } |
| 1874 | |
| 1875 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec |
| 1876 | #define TARGET_LITTLE_NAME "elf32-littlearm" |
| 1877 | #define TARGET_BIG_SYM bfd_elf32_bigarm_vec |
| 1878 | #define TARGET_BIG_NAME "elf32-bigarm" |
| 1879 | |
| 1880 | #define elf_backend_grok_prstatus elf32_arm_nabi_grok_prstatus |
| 1881 | #define elf_backend_grok_psinfo elf32_arm_nabi_grok_psinfo |
| 1882 | |
| 1883 | typedef unsigned long int insn32; |
| 1884 | typedef unsigned short int insn16; |
| 1885 | |
| 1886 | /* In lieu of proper flags, assume all EABIv4 or later objects are |
| 1887 | interworkable. */ |
| 1888 | #define INTERWORK_FLAG(abfd) \ |
| 1889 | (EF_ARM_EABI_VERSION (elf_elfheader (abfd)->e_flags) >= EF_ARM_EABI_VER4 \ |
| 1890 | || (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) \ |
| 1891 | || ((abfd)->flags & BFD_LINKER_CREATED)) |
| 1892 | |
| 1893 | /* The linker script knows the section names for placement. |
| 1894 | The entry_names are used to do simple name mangling on the stubs. |
| 1895 | Given a function name, and its type, the stub can be found. The |
| 1896 | name can be changed. The only requirement is the %s be present. */ |
| 1897 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" |
| 1898 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" |
| 1899 | |
| 1900 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" |
| 1901 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" |
| 1902 | |
| 1903 | #define VFP11_ERRATUM_VENEER_SECTION_NAME ".vfp11_veneer" |
| 1904 | #define VFP11_ERRATUM_VENEER_ENTRY_NAME "__vfp11_veneer_%x" |
| 1905 | |
| 1906 | #define ARM_BX_GLUE_SECTION_NAME ".v4_bx" |
| 1907 | #define ARM_BX_GLUE_ENTRY_NAME "__bx_r%d" |
| 1908 | |
| 1909 | #define STUB_ENTRY_NAME "__%s_veneer" |
| 1910 | |
| 1911 | /* The name of the dynamic interpreter. This is put in the .interp |
| 1912 | section. */ |
| 1913 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 1914 | |
| 1915 | #ifdef FOUR_WORD_PLT |
| 1916 | |
| 1917 | /* The first entry in a procedure linkage table looks like |
| 1918 | this. It is set up so that any shared library function that is |
| 1919 | called before the relocation has been set up calls the dynamic |
| 1920 | linker first. */ |
| 1921 | static const bfd_vma elf32_arm_plt0_entry [] = |
| 1922 | { |
| 1923 | 0xe52de004, /* str lr, [sp, #-4]! */ |
| 1924 | 0xe59fe010, /* ldr lr, [pc, #16] */ |
| 1925 | 0xe08fe00e, /* add lr, pc, lr */ |
| 1926 | 0xe5bef008, /* ldr pc, [lr, #8]! */ |
| 1927 | }; |
| 1928 | |
| 1929 | /* Subsequent entries in a procedure linkage table look like |
| 1930 | this. */ |
| 1931 | static const bfd_vma elf32_arm_plt_entry [] = |
| 1932 | { |
| 1933 | 0xe28fc600, /* add ip, pc, #NN */ |
| 1934 | 0xe28cca00, /* add ip, ip, #NN */ |
| 1935 | 0xe5bcf000, /* ldr pc, [ip, #NN]! */ |
| 1936 | 0x00000000, /* unused */ |
| 1937 | }; |
| 1938 | |
| 1939 | #else |
| 1940 | |
| 1941 | /* The first entry in a procedure linkage table looks like |
| 1942 | this. It is set up so that any shared library function that is |
| 1943 | called before the relocation has been set up calls the dynamic |
| 1944 | linker first. */ |
| 1945 | static const bfd_vma elf32_arm_plt0_entry [] = |
| 1946 | { |
| 1947 | 0xe52de004, /* str lr, [sp, #-4]! */ |
| 1948 | 0xe59fe004, /* ldr lr, [pc, #4] */ |
| 1949 | 0xe08fe00e, /* add lr, pc, lr */ |
| 1950 | 0xe5bef008, /* ldr pc, [lr, #8]! */ |
| 1951 | 0x00000000, /* &GOT[0] - . */ |
| 1952 | }; |
| 1953 | |
| 1954 | /* Subsequent entries in a procedure linkage table look like |
| 1955 | this. */ |
| 1956 | static const bfd_vma elf32_arm_plt_entry [] = |
| 1957 | { |
| 1958 | 0xe28fc600, /* add ip, pc, #0xNN00000 */ |
| 1959 | 0xe28cca00, /* add ip, ip, #0xNN000 */ |
| 1960 | 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */ |
| 1961 | }; |
| 1962 | |
| 1963 | #endif |
| 1964 | |
| 1965 | /* The format of the first entry in the procedure linkage table |
| 1966 | for a VxWorks executable. */ |
| 1967 | static const bfd_vma elf32_arm_vxworks_exec_plt0_entry[] = |
| 1968 | { |
| 1969 | 0xe52dc008, /* str ip,[sp,#-8]! */ |
| 1970 | 0xe59fc000, /* ldr ip,[pc] */ |
| 1971 | 0xe59cf008, /* ldr pc,[ip,#8] */ |
| 1972 | 0x00000000, /* .long _GLOBAL_OFFSET_TABLE_ */ |
| 1973 | }; |
| 1974 | |
| 1975 | /* The format of subsequent entries in a VxWorks executable. */ |
| 1976 | static const bfd_vma elf32_arm_vxworks_exec_plt_entry[] = |
| 1977 | { |
| 1978 | 0xe59fc000, /* ldr ip,[pc] */ |
| 1979 | 0xe59cf000, /* ldr pc,[ip] */ |
| 1980 | 0x00000000, /* .long @got */ |
| 1981 | 0xe59fc000, /* ldr ip,[pc] */ |
| 1982 | 0xea000000, /* b _PLT */ |
| 1983 | 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */ |
| 1984 | }; |
| 1985 | |
| 1986 | /* The format of entries in a VxWorks shared library. */ |
| 1987 | static const bfd_vma elf32_arm_vxworks_shared_plt_entry[] = |
| 1988 | { |
| 1989 | 0xe59fc000, /* ldr ip,[pc] */ |
| 1990 | 0xe79cf009, /* ldr pc,[ip,r9] */ |
| 1991 | 0x00000000, /* .long @got */ |
| 1992 | 0xe59fc000, /* ldr ip,[pc] */ |
| 1993 | 0xe599f008, /* ldr pc,[r9,#8] */ |
| 1994 | 0x00000000, /* .long @pltindex*sizeof(Elf32_Rela) */ |
| 1995 | }; |
| 1996 | |
| 1997 | /* An initial stub used if the PLT entry is referenced from Thumb code. */ |
| 1998 | #define PLT_THUMB_STUB_SIZE 4 |
| 1999 | static const bfd_vma elf32_arm_plt_thumb_stub [] = |
| 2000 | { |
| 2001 | 0x4778, /* bx pc */ |
| 2002 | 0x46c0 /* nop */ |
| 2003 | }; |
| 2004 | |
| 2005 | /* The entries in a PLT when using a DLL-based target with multiple |
| 2006 | address spaces. */ |
| 2007 | static const bfd_vma elf32_arm_symbian_plt_entry [] = |
| 2008 | { |
| 2009 | 0xe51ff004, /* ldr pc, [pc, #-4] */ |
| 2010 | 0x00000000, /* dcd R_ARM_GLOB_DAT(X) */ |
| 2011 | }; |
| 2012 | |
| 2013 | #define ARM_MAX_FWD_BRANCH_OFFSET ((((1 << 23) - 1) << 2) + 8) |
| 2014 | #define ARM_MAX_BWD_BRANCH_OFFSET ((-((1 << 23) << 2)) + 8) |
| 2015 | #define THM_MAX_FWD_BRANCH_OFFSET ((1 << 22) -2 + 4) |
| 2016 | #define THM_MAX_BWD_BRANCH_OFFSET (-(1 << 22) + 4) |
| 2017 | #define THM2_MAX_FWD_BRANCH_OFFSET (((1 << 24) - 2) + 4) |
| 2018 | #define THM2_MAX_BWD_BRANCH_OFFSET (-(1 << 24) + 4) |
| 2019 | |
| 2020 | enum stub_insn_type |
| 2021 | { |
| 2022 | THUMB16_TYPE = 1, |
| 2023 | THUMB32_TYPE, |
| 2024 | ARM_TYPE, |
| 2025 | DATA_TYPE |
| 2026 | }; |
| 2027 | |
| 2028 | #define THUMB16_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 0} |
| 2029 | /* A bit of a hack. A Thumb conditional branch, in which the proper condition |
| 2030 | is inserted in arm_build_one_stub(). */ |
| 2031 | #define THUMB16_BCOND_INSN(X) {(X), THUMB16_TYPE, R_ARM_NONE, 1} |
| 2032 | #define THUMB32_INSN(X) {(X), THUMB32_TYPE, R_ARM_NONE, 0} |
| 2033 | #define THUMB32_B_INSN(X, Z) {(X), THUMB32_TYPE, R_ARM_THM_JUMP24, (Z)} |
| 2034 | #define ARM_INSN(X) {(X), ARM_TYPE, R_ARM_NONE, 0} |
| 2035 | #define ARM_REL_INSN(X, Z) {(X), ARM_TYPE, R_ARM_JUMP24, (Z)} |
| 2036 | #define DATA_WORD(X,Y,Z) {(X), DATA_TYPE, (Y), (Z)} |
| 2037 | |
| 2038 | typedef struct |
| 2039 | { |
| 2040 | bfd_vma data; |
| 2041 | enum stub_insn_type type; |
| 2042 | unsigned int r_type; |
| 2043 | int reloc_addend; |
| 2044 | } insn_sequence; |
| 2045 | |
| 2046 | /* Arm/Thumb -> Arm/Thumb long branch stub. On V5T and above, use blx |
| 2047 | to reach the stub if necessary. */ |
| 2048 | static const insn_sequence elf32_arm_stub_long_branch_any_any[] = |
| 2049 | { |
| 2050 | ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */ |
| 2051 | DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */ |
| 2052 | }; |
| 2053 | |
| 2054 | /* V4T Arm -> Thumb long branch stub. Used on V4T where blx is not |
| 2055 | available. */ |
| 2056 | static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb[] = |
| 2057 | { |
| 2058 | ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */ |
| 2059 | ARM_INSN(0xe12fff1c), /* bx ip */ |
| 2060 | DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */ |
| 2061 | }; |
| 2062 | |
| 2063 | /* Thumb -> Thumb long branch stub. Used on M-profile architectures. */ |
| 2064 | static const insn_sequence elf32_arm_stub_long_branch_thumb_only[] = |
| 2065 | { |
| 2066 | THUMB16_INSN(0xb401), /* push {r0} */ |
| 2067 | THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */ |
| 2068 | THUMB16_INSN(0x4684), /* mov ip, r0 */ |
| 2069 | THUMB16_INSN(0xbc01), /* pop {r0} */ |
| 2070 | THUMB16_INSN(0x4760), /* bx ip */ |
| 2071 | THUMB16_INSN(0xbf00), /* nop */ |
| 2072 | DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */ |
| 2073 | }; |
| 2074 | |
| 2075 | /* V4T Thumb -> Thumb long branch stub. Using the stack is not |
| 2076 | allowed. */ |
| 2077 | static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb[] = |
| 2078 | { |
| 2079 | THUMB16_INSN(0x4778), /* bx pc */ |
| 2080 | THUMB16_INSN(0x46c0), /* nop */ |
| 2081 | ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */ |
| 2082 | ARM_INSN(0xe12fff1c), /* bx ip */ |
| 2083 | DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */ |
| 2084 | }; |
| 2085 | |
| 2086 | /* V4T Thumb -> ARM long branch stub. Used on V4T where blx is not |
| 2087 | available. */ |
| 2088 | static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm[] = |
| 2089 | { |
| 2090 | THUMB16_INSN(0x4778), /* bx pc */ |
| 2091 | THUMB16_INSN(0x46c0), /* nop */ |
| 2092 | ARM_INSN(0xe51ff004), /* ldr pc, [pc, #-4] */ |
| 2093 | DATA_WORD(0, R_ARM_ABS32, 0), /* dcd R_ARM_ABS32(X) */ |
| 2094 | }; |
| 2095 | |
| 2096 | /* V4T Thumb -> ARM short branch stub. Shorter variant of the above |
| 2097 | one, when the destination is close enough. */ |
| 2098 | static const insn_sequence elf32_arm_stub_short_branch_v4t_thumb_arm[] = |
| 2099 | { |
| 2100 | THUMB16_INSN(0x4778), /* bx pc */ |
| 2101 | THUMB16_INSN(0x46c0), /* nop */ |
| 2102 | ARM_REL_INSN(0xea000000, -8), /* b (X-8) */ |
| 2103 | }; |
| 2104 | |
| 2105 | /* ARM/Thumb -> ARM long branch stub, PIC. On V5T and above, use |
| 2106 | blx to reach the stub if necessary. */ |
| 2107 | static const insn_sequence elf32_arm_stub_long_branch_any_arm_pic[] = |
| 2108 | { |
| 2109 | ARM_INSN(0xe59fc000), /* ldr ip, [pc] */ |
| 2110 | ARM_INSN(0xe08ff00c), /* add pc, pc, ip */ |
| 2111 | DATA_WORD(0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X-4) */ |
| 2112 | }; |
| 2113 | |
| 2114 | /* ARM/Thumb -> Thumb long branch stub, PIC. On V5T and above, use |
| 2115 | blx to reach the stub if necessary. We can not add into pc; |
| 2116 | it is not guaranteed to mode switch (different in ARMv6 and |
| 2117 | ARMv7). */ |
| 2118 | static const insn_sequence elf32_arm_stub_long_branch_any_thumb_pic[] = |
| 2119 | { |
| 2120 | ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */ |
| 2121 | ARM_INSN(0xe08fc00c), /* add ip, pc, ip */ |
| 2122 | ARM_INSN(0xe12fff1c), /* bx ip */ |
| 2123 | DATA_WORD(0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */ |
| 2124 | }; |
| 2125 | |
| 2126 | /* V4T ARM -> ARM long branch stub, PIC. */ |
| 2127 | static const insn_sequence elf32_arm_stub_long_branch_v4t_arm_thumb_pic[] = |
| 2128 | { |
| 2129 | ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */ |
| 2130 | ARM_INSN(0xe08fc00c), /* add ip, pc, ip */ |
| 2131 | ARM_INSN(0xe12fff1c), /* bx ip */ |
| 2132 | DATA_WORD(0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */ |
| 2133 | }; |
| 2134 | |
| 2135 | /* V4T Thumb -> ARM long branch stub, PIC. */ |
| 2136 | static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_arm_pic[] = |
| 2137 | { |
| 2138 | THUMB16_INSN(0x4778), /* bx pc */ |
| 2139 | THUMB16_INSN(0x46c0), /* nop */ |
| 2140 | ARM_INSN(0xe59fc000), /* ldr ip, [pc, #0] */ |
| 2141 | ARM_INSN(0xe08cf00f), /* add pc, ip, pc */ |
| 2142 | DATA_WORD(0, R_ARM_REL32, -4), /* dcd R_ARM_REL32(X) */ |
| 2143 | }; |
| 2144 | |
| 2145 | /* Thumb -> Thumb long branch stub, PIC. Used on M-profile |
| 2146 | architectures. */ |
| 2147 | static const insn_sequence elf32_arm_stub_long_branch_thumb_only_pic[] = |
| 2148 | { |
| 2149 | THUMB16_INSN(0xb401), /* push {r0} */ |
| 2150 | THUMB16_INSN(0x4802), /* ldr r0, [pc, #8] */ |
| 2151 | THUMB16_INSN(0x46fc), /* mov ip, pc */ |
| 2152 | THUMB16_INSN(0x4484), /* add ip, r0 */ |
| 2153 | THUMB16_INSN(0xbc01), /* pop {r0} */ |
| 2154 | THUMB16_INSN(0x4760), /* bx ip */ |
| 2155 | DATA_WORD(0, R_ARM_REL32, 4), /* dcd R_ARM_REL32(X) */ |
| 2156 | }; |
| 2157 | |
| 2158 | /* V4T Thumb -> Thumb long branch stub, PIC. Using the stack is not |
| 2159 | allowed. */ |
| 2160 | static const insn_sequence elf32_arm_stub_long_branch_v4t_thumb_thumb_pic[] = |
| 2161 | { |
| 2162 | THUMB16_INSN(0x4778), /* bx pc */ |
| 2163 | THUMB16_INSN(0x46c0), /* nop */ |
| 2164 | ARM_INSN(0xe59fc004), /* ldr ip, [pc, #4] */ |
| 2165 | ARM_INSN(0xe08fc00c), /* add ip, pc, ip */ |
| 2166 | ARM_INSN(0xe12fff1c), /* bx ip */ |
| 2167 | DATA_WORD(0, R_ARM_REL32, 0), /* dcd R_ARM_REL32(X) */ |
| 2168 | }; |
| 2169 | |
| 2170 | /* Cortex-A8 erratum-workaround stubs. */ |
| 2171 | |
| 2172 | /* Stub used for conditional branches (which may be beyond +/-1MB away, so we |
| 2173 | can't use a conditional branch to reach this stub). */ |
| 2174 | |
| 2175 | static const insn_sequence elf32_arm_stub_a8_veneer_b_cond[] = |
| 2176 | { |
| 2177 | THUMB16_BCOND_INSN(0xd001), /* b<cond>.n true. */ |
| 2178 | THUMB32_B_INSN(0xf000b800, -4), /* b.w insn_after_original_branch. */ |
| 2179 | THUMB32_B_INSN(0xf000b800, -4) /* true: b.w original_branch_dest. */ |
| 2180 | }; |
| 2181 | |
| 2182 | /* Stub used for b.w and bl.w instructions. */ |
| 2183 | |
| 2184 | static const insn_sequence elf32_arm_stub_a8_veneer_b[] = |
| 2185 | { |
| 2186 | THUMB32_B_INSN(0xf000b800, -4) /* b.w original_branch_dest. */ |
| 2187 | }; |
| 2188 | |
| 2189 | static const insn_sequence elf32_arm_stub_a8_veneer_bl[] = |
| 2190 | { |
| 2191 | THUMB32_B_INSN(0xf000b800, -4) /* b.w original_branch_dest. */ |
| 2192 | }; |
| 2193 | |
| 2194 | /* Stub used for Thumb-2 blx.w instructions. We modified the original blx.w |
| 2195 | instruction (which switches to ARM mode) to point to this stub. Jump to the |
| 2196 | real destination using an ARM-mode branch. */ |
| 2197 | |
| 2198 | static const insn_sequence elf32_arm_stub_a8_veneer_blx[] = |
| 2199 | { |
| 2200 | ARM_REL_INSN(0xea000000, -8) /* b original_branch_dest. */ |
| 2201 | }; |
| 2202 | |
| 2203 | /* Section name for stubs is the associated section name plus this |
| 2204 | string. */ |
| 2205 | #define STUB_SUFFIX ".stub" |
| 2206 | |
| 2207 | /* One entry per long/short branch stub defined above. */ |
| 2208 | #define DEF_STUBS \ |
| 2209 | DEF_STUB(long_branch_any_any) \ |
| 2210 | DEF_STUB(long_branch_v4t_arm_thumb) \ |
| 2211 | DEF_STUB(long_branch_thumb_only) \ |
| 2212 | DEF_STUB(long_branch_v4t_thumb_thumb) \ |
| 2213 | DEF_STUB(long_branch_v4t_thumb_arm) \ |
| 2214 | DEF_STUB(short_branch_v4t_thumb_arm) \ |
| 2215 | DEF_STUB(long_branch_any_arm_pic) \ |
| 2216 | DEF_STUB(long_branch_any_thumb_pic) \ |
| 2217 | DEF_STUB(long_branch_v4t_thumb_thumb_pic) \ |
| 2218 | DEF_STUB(long_branch_v4t_arm_thumb_pic) \ |
| 2219 | DEF_STUB(long_branch_v4t_thumb_arm_pic) \ |
| 2220 | DEF_STUB(long_branch_thumb_only_pic) \ |
| 2221 | DEF_STUB(a8_veneer_b_cond) \ |
| 2222 | DEF_STUB(a8_veneer_b) \ |
| 2223 | DEF_STUB(a8_veneer_bl) \ |
| 2224 | DEF_STUB(a8_veneer_blx) |
| 2225 | |
| 2226 | #define DEF_STUB(x) arm_stub_##x, |
| 2227 | enum elf32_arm_stub_type { |
| 2228 | arm_stub_none, |
| 2229 | DEF_STUBS |
| 2230 | /* Note the first a8_veneer type */ |
| 2231 | arm_stub_a8_veneer_lwm = arm_stub_a8_veneer_b_cond |
| 2232 | }; |
| 2233 | #undef DEF_STUB |
| 2234 | |
| 2235 | typedef struct |
| 2236 | { |
| 2237 | const insn_sequence* template_sequence; |
| 2238 | int template_size; |
| 2239 | } stub_def; |
| 2240 | |
| 2241 | #define DEF_STUB(x) {elf32_arm_stub_##x, ARRAY_SIZE(elf32_arm_stub_##x)}, |
| 2242 | static const stub_def stub_definitions[] = { |
| 2243 | {NULL, 0}, |
| 2244 | DEF_STUBS |
| 2245 | }; |
| 2246 | |
| 2247 | struct elf32_arm_stub_hash_entry |
| 2248 | { |
| 2249 | /* Base hash table entry structure. */ |
| 2250 | struct bfd_hash_entry root; |
| 2251 | |
| 2252 | /* The stub section. */ |
| 2253 | asection *stub_sec; |
| 2254 | |
| 2255 | /* Offset within stub_sec of the beginning of this stub. */ |
| 2256 | bfd_vma stub_offset; |
| 2257 | |
| 2258 | /* Given the symbol's value and its section we can determine its final |
| 2259 | value when building the stubs (so the stub knows where to jump). */ |
| 2260 | bfd_vma target_value; |
| 2261 | asection *target_section; |
| 2262 | |
| 2263 | /* Offset to apply to relocation referencing target_value. */ |
| 2264 | bfd_vma target_addend; |
| 2265 | |
| 2266 | /* The instruction which caused this stub to be generated (only valid for |
| 2267 | Cortex-A8 erratum workaround stubs at present). */ |
| 2268 | unsigned long orig_insn; |
| 2269 | |
| 2270 | /* The stub type. */ |
| 2271 | enum elf32_arm_stub_type stub_type; |
| 2272 | /* Its encoding size in bytes. */ |
| 2273 | int stub_size; |
| 2274 | /* Its template. */ |
| 2275 | const insn_sequence *stub_template; |
| 2276 | /* The size of the template (number of entries). */ |
| 2277 | int stub_template_size; |
| 2278 | |
| 2279 | /* The symbol table entry, if any, that this was derived from. */ |
| 2280 | struct elf32_arm_link_hash_entry *h; |
| 2281 | |
| 2282 | /* Destination symbol type (STT_ARM_TFUNC, ...) */ |
| 2283 | unsigned char st_type; |
| 2284 | |
| 2285 | /* Where this stub is being called from, or, in the case of combined |
| 2286 | stub sections, the first input section in the group. */ |
| 2287 | asection *id_sec; |
| 2288 | |
| 2289 | /* The name for the local symbol at the start of this stub. The |
| 2290 | stub name in the hash table has to be unique; this does not, so |
| 2291 | it can be friendlier. */ |
| 2292 | char *output_name; |
| 2293 | }; |
| 2294 | |
| 2295 | /* Used to build a map of a section. This is required for mixed-endian |
| 2296 | code/data. */ |
| 2297 | |
| 2298 | typedef struct elf32_elf_section_map |
| 2299 | { |
| 2300 | bfd_vma vma; |
| 2301 | char type; |
| 2302 | } |
| 2303 | elf32_arm_section_map; |
| 2304 | |
| 2305 | /* Information about a VFP11 erratum veneer, or a branch to such a veneer. */ |
| 2306 | |
| 2307 | typedef enum |
| 2308 | { |
| 2309 | VFP11_ERRATUM_BRANCH_TO_ARM_VENEER, |
| 2310 | VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER, |
| 2311 | VFP11_ERRATUM_ARM_VENEER, |
| 2312 | VFP11_ERRATUM_THUMB_VENEER |
| 2313 | } |
| 2314 | elf32_vfp11_erratum_type; |
| 2315 | |
| 2316 | typedef struct elf32_vfp11_erratum_list |
| 2317 | { |
| 2318 | struct elf32_vfp11_erratum_list *next; |
| 2319 | bfd_vma vma; |
| 2320 | union |
| 2321 | { |
| 2322 | struct |
| 2323 | { |
| 2324 | struct elf32_vfp11_erratum_list *veneer; |
| 2325 | unsigned int vfp_insn; |
| 2326 | } b; |
| 2327 | struct |
| 2328 | { |
| 2329 | struct elf32_vfp11_erratum_list *branch; |
| 2330 | unsigned int id; |
| 2331 | } v; |
| 2332 | } u; |
| 2333 | elf32_vfp11_erratum_type type; |
| 2334 | } |
| 2335 | elf32_vfp11_erratum_list; |
| 2336 | |
| 2337 | typedef enum |
| 2338 | { |
| 2339 | DELETE_EXIDX_ENTRY, |
| 2340 | INSERT_EXIDX_CANTUNWIND_AT_END |
| 2341 | } |
| 2342 | arm_unwind_edit_type; |
| 2343 | |
| 2344 | /* A (sorted) list of edits to apply to an unwind table. */ |
| 2345 | typedef struct arm_unwind_table_edit |
| 2346 | { |
| 2347 | arm_unwind_edit_type type; |
| 2348 | /* Note: we sometimes want to insert an unwind entry corresponding to a |
| 2349 | section different from the one we're currently writing out, so record the |
| 2350 | (text) section this edit relates to here. */ |
| 2351 | asection *linked_section; |
| 2352 | unsigned int index; |
| 2353 | struct arm_unwind_table_edit *next; |
| 2354 | } |
| 2355 | arm_unwind_table_edit; |
| 2356 | |
| 2357 | typedef struct _arm_elf_section_data |
| 2358 | { |
| 2359 | /* Information about mapping symbols. */ |
| 2360 | struct bfd_elf_section_data elf; |
| 2361 | unsigned int mapcount; |
| 2362 | unsigned int mapsize; |
| 2363 | elf32_arm_section_map *map; |
| 2364 | /* Information about CPU errata. */ |
| 2365 | unsigned int erratumcount; |
| 2366 | elf32_vfp11_erratum_list *erratumlist; |
| 2367 | /* Information about unwind tables. */ |
| 2368 | union |
| 2369 | { |
| 2370 | /* Unwind info attached to a text section. */ |
| 2371 | struct |
| 2372 | { |
| 2373 | asection *arm_exidx_sec; |
| 2374 | } text; |
| 2375 | |
| 2376 | /* Unwind info attached to an .ARM.exidx section. */ |
| 2377 | struct |
| 2378 | { |
| 2379 | arm_unwind_table_edit *unwind_edit_list; |
| 2380 | arm_unwind_table_edit *unwind_edit_tail; |
| 2381 | } exidx; |
| 2382 | } u; |
| 2383 | } |
| 2384 | _arm_elf_section_data; |
| 2385 | |
| 2386 | #define elf32_arm_section_data(sec) \ |
| 2387 | ((_arm_elf_section_data *) elf_section_data (sec)) |
| 2388 | |
| 2389 | /* A fix which might be required for Cortex-A8 Thumb-2 branch/TLB erratum. |
| 2390 | These fixes are subject to a relaxation procedure (in elf32_arm_size_stubs), |
| 2391 | so may be created multiple times: we use an array of these entries whilst |
| 2392 | relaxing which we can refresh easily, then create stubs for each potentially |
| 2393 | erratum-triggering instruction once we've settled on a solution. */ |
| 2394 | |
| 2395 | struct a8_erratum_fix { |
| 2396 | bfd *input_bfd; |
| 2397 | asection *section; |
| 2398 | bfd_vma offset; |
| 2399 | bfd_vma addend; |
| 2400 | unsigned long orig_insn; |
| 2401 | char *stub_name; |
| 2402 | enum elf32_arm_stub_type stub_type; |
| 2403 | int st_type; |
| 2404 | }; |
| 2405 | |
| 2406 | /* A table of relocs applied to branches which might trigger Cortex-A8 |
| 2407 | erratum. */ |
| 2408 | |
| 2409 | struct a8_erratum_reloc { |
| 2410 | bfd_vma from; |
| 2411 | bfd_vma destination; |
| 2412 | struct elf32_arm_link_hash_entry *hash; |
| 2413 | const char *sym_name; |
| 2414 | unsigned int r_type; |
| 2415 | unsigned char st_type; |
| 2416 | bfd_boolean non_a8_stub; |
| 2417 | }; |
| 2418 | |
| 2419 | /* The size of the thread control block. */ |
| 2420 | #define TCB_SIZE 8 |
| 2421 | |
| 2422 | struct elf_arm_obj_tdata |
| 2423 | { |
| 2424 | struct elf_obj_tdata root; |
| 2425 | |
| 2426 | /* tls_type for each local got entry. */ |
| 2427 | char *local_got_tls_type; |
| 2428 | |
| 2429 | /* Zero to warn when linking objects with incompatible enum sizes. */ |
| 2430 | int no_enum_size_warning; |
| 2431 | |
| 2432 | /* Zero to warn when linking objects with incompatible wchar_t sizes. */ |
| 2433 | int no_wchar_size_warning; |
| 2434 | }; |
| 2435 | |
| 2436 | #define elf_arm_tdata(bfd) \ |
| 2437 | ((struct elf_arm_obj_tdata *) (bfd)->tdata.any) |
| 2438 | |
| 2439 | #define elf32_arm_local_got_tls_type(bfd) \ |
| 2440 | (elf_arm_tdata (bfd)->local_got_tls_type) |
| 2441 | |
| 2442 | #define is_arm_elf(bfd) \ |
| 2443 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
| 2444 | && elf_tdata (bfd) != NULL \ |
| 2445 | && elf_object_id (bfd) == ARM_ELF_DATA) |
| 2446 | |
| 2447 | static bfd_boolean |
| 2448 | elf32_arm_mkobject (bfd *abfd) |
| 2449 | { |
| 2450 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_arm_obj_tdata), |
| 2451 | ARM_ELF_DATA); |
| 2452 | } |
| 2453 | |
| 2454 | /* The ARM linker needs to keep track of the number of relocs that it |
| 2455 | decides to copy in check_relocs for each symbol. This is so that |
| 2456 | it can discard PC relative relocs if it doesn't need them when |
| 2457 | linking with -Bsymbolic. We store the information in a field |
| 2458 | extending the regular ELF linker hash table. */ |
| 2459 | |
| 2460 | /* This structure keeps track of the number of relocs we have copied |
| 2461 | for a given symbol. */ |
| 2462 | struct elf32_arm_relocs_copied |
| 2463 | { |
| 2464 | /* Next section. */ |
| 2465 | struct elf32_arm_relocs_copied * next; |
| 2466 | /* A section in dynobj. */ |
| 2467 | asection * section; |
| 2468 | /* Number of relocs copied in this section. */ |
| 2469 | bfd_size_type count; |
| 2470 | /* Number of PC-relative relocs copied in this section. */ |
| 2471 | bfd_size_type pc_count; |
| 2472 | }; |
| 2473 | |
| 2474 | #define elf32_arm_hash_entry(ent) ((struct elf32_arm_link_hash_entry *)(ent)) |
| 2475 | |
| 2476 | /* Arm ELF linker hash entry. */ |
| 2477 | struct elf32_arm_link_hash_entry |
| 2478 | { |
| 2479 | struct elf_link_hash_entry root; |
| 2480 | |
| 2481 | /* Number of PC relative relocs copied for this symbol. */ |
| 2482 | struct elf32_arm_relocs_copied * relocs_copied; |
| 2483 | |
| 2484 | /* We reference count Thumb references to a PLT entry separately, |
| 2485 | so that we can emit the Thumb trampoline only if needed. */ |
| 2486 | bfd_signed_vma plt_thumb_refcount; |
| 2487 | |
| 2488 | /* Some references from Thumb code may be eliminated by BL->BLX |
| 2489 | conversion, so record them separately. */ |
| 2490 | bfd_signed_vma plt_maybe_thumb_refcount; |
| 2491 | |
| 2492 | /* Since PLT entries have variable size if the Thumb prologue is |
| 2493 | used, we need to record the index into .got.plt instead of |
| 2494 | recomputing it from the PLT offset. */ |
| 2495 | bfd_signed_vma plt_got_offset; |
| 2496 | |
| 2497 | #define GOT_UNKNOWN 0 |
| 2498 | #define GOT_NORMAL 1 |
| 2499 | #define GOT_TLS_GD 2 |
| 2500 | #define GOT_TLS_IE 4 |
| 2501 | unsigned char tls_type; |
| 2502 | |
| 2503 | /* The symbol marking the real symbol location for exported thumb |
| 2504 | symbols with Arm stubs. */ |
| 2505 | struct elf_link_hash_entry *export_glue; |
| 2506 | |
| 2507 | /* A pointer to the most recently used stub hash entry against this |
| 2508 | symbol. */ |
| 2509 | struct elf32_arm_stub_hash_entry *stub_cache; |
| 2510 | }; |
| 2511 | |
| 2512 | /* Traverse an arm ELF linker hash table. */ |
| 2513 | #define elf32_arm_link_hash_traverse(table, func, info) \ |
| 2514 | (elf_link_hash_traverse \ |
| 2515 | (&(table)->root, \ |
| 2516 | (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func), \ |
| 2517 | (info))) |
| 2518 | |
| 2519 | /* Get the ARM elf linker hash table from a link_info structure. */ |
| 2520 | #define elf32_arm_hash_table(info) \ |
| 2521 | (elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \ |
| 2522 | == ARM_ELF_DATA ? ((struct elf32_arm_link_hash_table *) ((info)->hash)) : NULL) |
| 2523 | |
| 2524 | #define arm_stub_hash_lookup(table, string, create, copy) \ |
| 2525 | ((struct elf32_arm_stub_hash_entry *) \ |
| 2526 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 2527 | |
| 2528 | /* Array to keep track of which stub sections have been created, and |
| 2529 | information on stub grouping. */ |
| 2530 | struct map_stub |
| 2531 | { |
| 2532 | /* This is the section to which stubs in the group will be |
| 2533 | attached. */ |
| 2534 | asection *link_sec; |
| 2535 | /* The stub section. */ |
| 2536 | asection *stub_sec; |
| 2537 | }; |
| 2538 | |
| 2539 | /* ARM ELF linker hash table. */ |
| 2540 | struct elf32_arm_link_hash_table |
| 2541 | { |
| 2542 | /* The main hash table. */ |
| 2543 | struct elf_link_hash_table root; |
| 2544 | |
| 2545 | /* The size in bytes of the section containing the Thumb-to-ARM glue. */ |
| 2546 | bfd_size_type thumb_glue_size; |
| 2547 | |
| 2548 | /* The size in bytes of the section containing the ARM-to-Thumb glue. */ |
| 2549 | bfd_size_type arm_glue_size; |
| 2550 | |
| 2551 | /* The size in bytes of section containing the ARMv4 BX veneers. */ |
| 2552 | bfd_size_type bx_glue_size; |
| 2553 | |
| 2554 | /* Offsets of ARMv4 BX veneers. Bit1 set if present, and Bit0 set when |
| 2555 | veneer has been populated. */ |
| 2556 | bfd_vma bx_glue_offset[15]; |
| 2557 | |
| 2558 | /* The size in bytes of the section containing glue for VFP11 erratum |
| 2559 | veneers. */ |
| 2560 | bfd_size_type vfp11_erratum_glue_size; |
| 2561 | |
| 2562 | /* A table of fix locations for Cortex-A8 Thumb-2 branch/TLB erratum. This |
| 2563 | holds Cortex-A8 erratum fix locations between elf32_arm_size_stubs() and |
| 2564 | elf32_arm_write_section(). */ |
| 2565 | struct a8_erratum_fix *a8_erratum_fixes; |
| 2566 | unsigned int num_a8_erratum_fixes; |
| 2567 | |
| 2568 | /* An arbitrary input BFD chosen to hold the glue sections. */ |
| 2569 | bfd * bfd_of_glue_owner; |
| 2570 | |
| 2571 | /* Nonzero to output a BE8 image. */ |
| 2572 | int byteswap_code; |
| 2573 | |
| 2574 | /* Zero if R_ARM_TARGET1 means R_ARM_ABS32. |
| 2575 | Nonzero if R_ARM_TARGET1 means R_ARM_REL32. */ |
| 2576 | int target1_is_rel; |
| 2577 | |
| 2578 | /* The relocation to use for R_ARM_TARGET2 relocations. */ |
| 2579 | int target2_reloc; |
| 2580 | |
| 2581 | /* 0 = Ignore R_ARM_V4BX. |
| 2582 | 1 = Convert BX to MOV PC. |
| 2583 | 2 = Generate v4 interworing stubs. */ |
| 2584 | int fix_v4bx; |
| 2585 | |
| 2586 | /* Whether we should fix the Cortex-A8 Thumb-2 branch/TLB erratum. */ |
| 2587 | int fix_cortex_a8; |
| 2588 | |
| 2589 | /* Nonzero if the ARM/Thumb BLX instructions are available for use. */ |
| 2590 | int use_blx; |
| 2591 | |
| 2592 | /* What sort of code sequences we should look for which may trigger the |
| 2593 | VFP11 denorm erratum. */ |
| 2594 | bfd_arm_vfp11_fix vfp11_fix; |
| 2595 | |
| 2596 | /* Global counter for the number of fixes we have emitted. */ |
| 2597 | int num_vfp11_fixes; |
| 2598 | |
| 2599 | /* Nonzero to force PIC branch veneers. */ |
| 2600 | int pic_veneer; |
| 2601 | |
| 2602 | /* The number of bytes in the initial entry in the PLT. */ |
| 2603 | bfd_size_type plt_header_size; |
| 2604 | |
| 2605 | /* The number of bytes in the subsequent PLT etries. */ |
| 2606 | bfd_size_type plt_entry_size; |
| 2607 | |
| 2608 | /* True if the target system is VxWorks. */ |
| 2609 | int vxworks_p; |
| 2610 | |
| 2611 | /* True if the target system is Symbian OS. */ |
| 2612 | int symbian_p; |
| 2613 | |
| 2614 | /* True if the target uses REL relocations. */ |
| 2615 | int use_rel; |
| 2616 | |
| 2617 | /* Short-cuts to get to dynamic linker sections. */ |
| 2618 | asection *sgot; |
| 2619 | asection *sgotplt; |
| 2620 | asection *srelgot; |
| 2621 | asection *splt; |
| 2622 | asection *srelplt; |
| 2623 | asection *sdynbss; |
| 2624 | asection *srelbss; |
| 2625 | |
| 2626 | /* The (unloaded but important) VxWorks .rela.plt.unloaded section. */ |
| 2627 | asection *srelplt2; |
| 2628 | |
| 2629 | /* Data for R_ARM_TLS_LDM32 relocations. */ |
| 2630 | union |
| 2631 | { |
| 2632 | bfd_signed_vma refcount; |
| 2633 | bfd_vma offset; |
| 2634 | } tls_ldm_got; |
| 2635 | |
| 2636 | /* Small local sym cache. */ |
| 2637 | struct sym_cache sym_cache; |
| 2638 | |
| 2639 | /* For convenience in allocate_dynrelocs. */ |
| 2640 | bfd * obfd; |
| 2641 | |
| 2642 | /* The stub hash table. */ |
| 2643 | struct bfd_hash_table stub_hash_table; |
| 2644 | |
| 2645 | /* Linker stub bfd. */ |
| 2646 | bfd *stub_bfd; |
| 2647 | |
| 2648 | /* Linker call-backs. */ |
| 2649 | asection * (*add_stub_section) (const char *, asection *); |
| 2650 | void (*layout_sections_again) (void); |
| 2651 | |
| 2652 | /* Array to keep track of which stub sections have been created, and |
| 2653 | information on stub grouping. */ |
| 2654 | struct map_stub *stub_group; |
| 2655 | |
| 2656 | /* Number of elements in stub_group. */ |
| 2657 | int top_id; |
| 2658 | |
| 2659 | /* Assorted information used by elf32_arm_size_stubs. */ |
| 2660 | unsigned int bfd_count; |
| 2661 | int top_index; |
| 2662 | asection **input_list; |
| 2663 | }; |
| 2664 | |
| 2665 | /* Create an entry in an ARM ELF linker hash table. */ |
| 2666 | |
| 2667 | static struct bfd_hash_entry * |
| 2668 | elf32_arm_link_hash_newfunc (struct bfd_hash_entry * entry, |
| 2669 | struct bfd_hash_table * table, |
| 2670 | const char * string) |
| 2671 | { |
| 2672 | struct elf32_arm_link_hash_entry * ret = |
| 2673 | (struct elf32_arm_link_hash_entry *) entry; |
| 2674 | |
| 2675 | /* Allocate the structure if it has not already been allocated by a |
| 2676 | subclass. */ |
| 2677 | if (ret == NULL) |
| 2678 | ret = (struct elf32_arm_link_hash_entry *) |
| 2679 | bfd_hash_allocate (table, sizeof (struct elf32_arm_link_hash_entry)); |
| 2680 | if (ret == NULL) |
| 2681 | return (struct bfd_hash_entry *) ret; |
| 2682 | |
| 2683 | /* Call the allocation method of the superclass. */ |
| 2684 | ret = ((struct elf32_arm_link_hash_entry *) |
| 2685 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, |
| 2686 | table, string)); |
| 2687 | if (ret != NULL) |
| 2688 | { |
| 2689 | ret->relocs_copied = NULL; |
| 2690 | ret->tls_type = GOT_UNKNOWN; |
| 2691 | ret->plt_thumb_refcount = 0; |
| 2692 | ret->plt_maybe_thumb_refcount = 0; |
| 2693 | ret->plt_got_offset = -1; |
| 2694 | ret->export_glue = NULL; |
| 2695 | |
| 2696 | ret->stub_cache = NULL; |
| 2697 | } |
| 2698 | |
| 2699 | return (struct bfd_hash_entry *) ret; |
| 2700 | } |
| 2701 | |
| 2702 | /* Initialize an entry in the stub hash table. */ |
| 2703 | |
| 2704 | static struct bfd_hash_entry * |
| 2705 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 2706 | struct bfd_hash_table *table, |
| 2707 | const char *string) |
| 2708 | { |
| 2709 | /* Allocate the structure if it has not already been allocated by a |
| 2710 | subclass. */ |
| 2711 | if (entry == NULL) |
| 2712 | { |
| 2713 | entry = (struct bfd_hash_entry *) |
| 2714 | bfd_hash_allocate (table, sizeof (struct elf32_arm_stub_hash_entry)); |
| 2715 | if (entry == NULL) |
| 2716 | return entry; |
| 2717 | } |
| 2718 | |
| 2719 | /* Call the allocation method of the superclass. */ |
| 2720 | entry = bfd_hash_newfunc (entry, table, string); |
| 2721 | if (entry != NULL) |
| 2722 | { |
| 2723 | struct elf32_arm_stub_hash_entry *eh; |
| 2724 | |
| 2725 | /* Initialize the local fields. */ |
| 2726 | eh = (struct elf32_arm_stub_hash_entry *) entry; |
| 2727 | eh->stub_sec = NULL; |
| 2728 | eh->stub_offset = 0; |
| 2729 | eh->target_value = 0; |
| 2730 | eh->target_section = NULL; |
| 2731 | eh->target_addend = 0; |
| 2732 | eh->orig_insn = 0; |
| 2733 | eh->stub_type = arm_stub_none; |
| 2734 | eh->stub_size = 0; |
| 2735 | eh->stub_template = NULL; |
| 2736 | eh->stub_template_size = 0; |
| 2737 | eh->h = NULL; |
| 2738 | eh->id_sec = NULL; |
| 2739 | eh->output_name = NULL; |
| 2740 | } |
| 2741 | |
| 2742 | return entry; |
| 2743 | } |
| 2744 | |
| 2745 | /* Create .got, .gotplt, and .rel(a).got sections in DYNOBJ, and set up |
| 2746 | shortcuts to them in our hash table. */ |
| 2747 | |
| 2748 | static bfd_boolean |
| 2749 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
| 2750 | { |
| 2751 | struct elf32_arm_link_hash_table *htab; |
| 2752 | |
| 2753 | htab = elf32_arm_hash_table (info); |
| 2754 | if (htab == NULL) |
| 2755 | return FALSE; |
| 2756 | |
| 2757 | /* BPABI objects never have a GOT, or associated sections. */ |
| 2758 | if (htab->symbian_p) |
| 2759 | return TRUE; |
| 2760 | |
| 2761 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 2762 | return FALSE; |
| 2763 | |
| 2764 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 2765 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 2766 | if (!htab->sgot || !htab->sgotplt) |
| 2767 | abort (); |
| 2768 | |
| 2769 | htab->srelgot = bfd_get_section_by_name (dynobj, |
| 2770 | RELOC_SECTION (htab, ".got")); |
| 2771 | if (htab->srelgot == NULL) |
| 2772 | return FALSE; |
| 2773 | return TRUE; |
| 2774 | } |
| 2775 | |
| 2776 | /* Create .plt, .rel(a).plt, .got, .got.plt, .rel(a).got, .dynbss, and |
| 2777 | .rel(a).bss sections in DYNOBJ, and set up shortcuts to them in our |
| 2778 | hash table. */ |
| 2779 | |
| 2780 | static bfd_boolean |
| 2781 | elf32_arm_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
| 2782 | { |
| 2783 | struct elf32_arm_link_hash_table *htab; |
| 2784 | |
| 2785 | htab = elf32_arm_hash_table (info); |
| 2786 | if (htab == NULL) |
| 2787 | return FALSE; |
| 2788 | |
| 2789 | if (!htab->sgot && !create_got_section (dynobj, info)) |
| 2790 | return FALSE; |
| 2791 | |
| 2792 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| 2793 | return FALSE; |
| 2794 | |
| 2795 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 2796 | htab->srelplt = bfd_get_section_by_name (dynobj, |
| 2797 | RELOC_SECTION (htab, ".plt")); |
| 2798 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 2799 | if (!info->shared) |
| 2800 | htab->srelbss = bfd_get_section_by_name (dynobj, |
| 2801 | RELOC_SECTION (htab, ".bss")); |
| 2802 | |
| 2803 | if (htab->vxworks_p) |
| 2804 | { |
| 2805 | if (!elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2)) |
| 2806 | return FALSE; |
| 2807 | |
| 2808 | if (info->shared) |
| 2809 | { |
| 2810 | htab->plt_header_size = 0; |
| 2811 | htab->plt_entry_size |
| 2812 | = 4 * ARRAY_SIZE (elf32_arm_vxworks_shared_plt_entry); |
| 2813 | } |
| 2814 | else |
| 2815 | { |
| 2816 | htab->plt_header_size |
| 2817 | = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt0_entry); |
| 2818 | htab->plt_entry_size |
| 2819 | = 4 * ARRAY_SIZE (elf32_arm_vxworks_exec_plt_entry); |
| 2820 | } |
| 2821 | } |
| 2822 | |
| 2823 | if (!htab->splt |
| 2824 | || !htab->srelplt |
| 2825 | || !htab->sdynbss |
| 2826 | || (!info->shared && !htab->srelbss)) |
| 2827 | abort (); |
| 2828 | |
| 2829 | return TRUE; |
| 2830 | } |
| 2831 | |
| 2832 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2833 | |
| 2834 | static void |
| 2835 | elf32_arm_copy_indirect_symbol (struct bfd_link_info *info, |
| 2836 | struct elf_link_hash_entry *dir, |
| 2837 | struct elf_link_hash_entry *ind) |
| 2838 | { |
| 2839 | struct elf32_arm_link_hash_entry *edir, *eind; |
| 2840 | |
| 2841 | edir = (struct elf32_arm_link_hash_entry *) dir; |
| 2842 | eind = (struct elf32_arm_link_hash_entry *) ind; |
| 2843 | |
| 2844 | if (eind->relocs_copied != NULL) |
| 2845 | { |
| 2846 | if (edir->relocs_copied != NULL) |
| 2847 | { |
| 2848 | struct elf32_arm_relocs_copied **pp; |
| 2849 | struct elf32_arm_relocs_copied *p; |
| 2850 | |
| 2851 | /* Add reloc counts against the indirect sym to the direct sym |
| 2852 | list. Merge any entries against the same section. */ |
| 2853 | for (pp = &eind->relocs_copied; (p = *pp) != NULL; ) |
| 2854 | { |
| 2855 | struct elf32_arm_relocs_copied *q; |
| 2856 | |
| 2857 | for (q = edir->relocs_copied; q != NULL; q = q->next) |
| 2858 | if (q->section == p->section) |
| 2859 | { |
| 2860 | q->pc_count += p->pc_count; |
| 2861 | q->count += p->count; |
| 2862 | *pp = p->next; |
| 2863 | break; |
| 2864 | } |
| 2865 | if (q == NULL) |
| 2866 | pp = &p->next; |
| 2867 | } |
| 2868 | *pp = edir->relocs_copied; |
| 2869 | } |
| 2870 | |
| 2871 | edir->relocs_copied = eind->relocs_copied; |
| 2872 | eind->relocs_copied = NULL; |
| 2873 | } |
| 2874 | |
| 2875 | if (ind->root.type == bfd_link_hash_indirect) |
| 2876 | { |
| 2877 | /* Copy over PLT info. */ |
| 2878 | edir->plt_thumb_refcount += eind->plt_thumb_refcount; |
| 2879 | eind->plt_thumb_refcount = 0; |
| 2880 | edir->plt_maybe_thumb_refcount += eind->plt_maybe_thumb_refcount; |
| 2881 | eind->plt_maybe_thumb_refcount = 0; |
| 2882 | |
| 2883 | if (dir->got.refcount <= 0) |
| 2884 | { |
| 2885 | edir->tls_type = eind->tls_type; |
| 2886 | eind->tls_type = GOT_UNKNOWN; |
| 2887 | } |
| 2888 | } |
| 2889 | |
| 2890 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 2891 | } |
| 2892 | |
| 2893 | /* Create an ARM elf linker hash table. */ |
| 2894 | |
| 2895 | static struct bfd_link_hash_table * |
| 2896 | elf32_arm_link_hash_table_create (bfd *abfd) |
| 2897 | { |
| 2898 | struct elf32_arm_link_hash_table *ret; |
| 2899 | bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table); |
| 2900 | |
| 2901 | ret = (struct elf32_arm_link_hash_table *) bfd_malloc (amt); |
| 2902 | if (ret == NULL) |
| 2903 | return NULL; |
| 2904 | |
| 2905 | if (!_bfd_elf_link_hash_table_init (& ret->root, abfd, |
| 2906 | elf32_arm_link_hash_newfunc, |
| 2907 | sizeof (struct elf32_arm_link_hash_entry), |
| 2908 | ARM_ELF_DATA)) |
| 2909 | { |
| 2910 | free (ret); |
| 2911 | return NULL; |
| 2912 | } |
| 2913 | |
| 2914 | ret->sgot = NULL; |
| 2915 | ret->sgotplt = NULL; |
| 2916 | ret->srelgot = NULL; |
| 2917 | ret->splt = NULL; |
| 2918 | ret->srelplt = NULL; |
| 2919 | ret->sdynbss = NULL; |
| 2920 | ret->srelbss = NULL; |
| 2921 | ret->srelplt2 = NULL; |
| 2922 | ret->thumb_glue_size = 0; |
| 2923 | ret->arm_glue_size = 0; |
| 2924 | ret->bx_glue_size = 0; |
| 2925 | memset (ret->bx_glue_offset, 0, sizeof (ret->bx_glue_offset)); |
| 2926 | ret->vfp11_fix = BFD_ARM_VFP11_FIX_NONE; |
| 2927 | ret->vfp11_erratum_glue_size = 0; |
| 2928 | ret->num_vfp11_fixes = 0; |
| 2929 | ret->fix_cortex_a8 = 0; |
| 2930 | ret->bfd_of_glue_owner = NULL; |
| 2931 | ret->byteswap_code = 0; |
| 2932 | ret->target1_is_rel = 0; |
| 2933 | ret->target2_reloc = R_ARM_NONE; |
| 2934 | #ifdef FOUR_WORD_PLT |
| 2935 | ret->plt_header_size = 16; |
| 2936 | ret->plt_entry_size = 16; |
| 2937 | #else |
| 2938 | ret->plt_header_size = 20; |
| 2939 | ret->plt_entry_size = 12; |
| 2940 | #endif |
| 2941 | ret->fix_v4bx = 0; |
| 2942 | ret->use_blx = 0; |
| 2943 | ret->vxworks_p = 0; |
| 2944 | ret->symbian_p = 0; |
| 2945 | ret->use_rel = 1; |
| 2946 | ret->sym_cache.abfd = NULL; |
| 2947 | ret->obfd = abfd; |
| 2948 | ret->tls_ldm_got.refcount = 0; |
| 2949 | ret->stub_bfd = NULL; |
| 2950 | ret->add_stub_section = NULL; |
| 2951 | ret->layout_sections_again = NULL; |
| 2952 | ret->stub_group = NULL; |
| 2953 | ret->top_id = 0; |
| 2954 | ret->bfd_count = 0; |
| 2955 | ret->top_index = 0; |
| 2956 | ret->input_list = NULL; |
| 2957 | |
| 2958 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc, |
| 2959 | sizeof (struct elf32_arm_stub_hash_entry))) |
| 2960 | { |
| 2961 | free (ret); |
| 2962 | return NULL; |
| 2963 | } |
| 2964 | |
| 2965 | return &ret->root.root; |
| 2966 | } |
| 2967 | |
| 2968 | /* Free the derived linker hash table. */ |
| 2969 | |
| 2970 | static void |
| 2971 | elf32_arm_hash_table_free (struct bfd_link_hash_table *hash) |
| 2972 | { |
| 2973 | struct elf32_arm_link_hash_table *ret |
| 2974 | = (struct elf32_arm_link_hash_table *) hash; |
| 2975 | |
| 2976 | bfd_hash_table_free (&ret->stub_hash_table); |
| 2977 | _bfd_generic_link_hash_table_free (hash); |
| 2978 | } |
| 2979 | |
| 2980 | /* Determine if we're dealing with a Thumb only architecture. */ |
| 2981 | |
| 2982 | static bfd_boolean |
| 2983 | using_thumb_only (struct elf32_arm_link_hash_table *globals) |
| 2984 | { |
| 2985 | int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, |
| 2986 | Tag_CPU_arch); |
| 2987 | int profile; |
| 2988 | |
| 2989 | if (arch == TAG_CPU_ARCH_V6_M || arch == TAG_CPU_ARCH_V6S_M) |
| 2990 | return TRUE; |
| 2991 | |
| 2992 | if (arch != TAG_CPU_ARCH_V7 && arch != TAG_CPU_ARCH_V7E_M) |
| 2993 | return FALSE; |
| 2994 | |
| 2995 | profile = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, |
| 2996 | Tag_CPU_arch_profile); |
| 2997 | |
| 2998 | return profile == 'M'; |
| 2999 | } |
| 3000 | |
| 3001 | /* Determine if we're dealing with a Thumb-2 object. */ |
| 3002 | |
| 3003 | static bfd_boolean |
| 3004 | using_thumb2 (struct elf32_arm_link_hash_table *globals) |
| 3005 | { |
| 3006 | int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, |
| 3007 | Tag_CPU_arch); |
| 3008 | return arch == TAG_CPU_ARCH_V6T2 || arch >= TAG_CPU_ARCH_V7; |
| 3009 | } |
| 3010 | |
| 3011 | /* Determine what kind of NOPs are available. */ |
| 3012 | |
| 3013 | static bfd_boolean |
| 3014 | arch_has_arm_nop (struct elf32_arm_link_hash_table *globals) |
| 3015 | { |
| 3016 | const int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, |
| 3017 | Tag_CPU_arch); |
| 3018 | return arch == TAG_CPU_ARCH_V6T2 |
| 3019 | || arch == TAG_CPU_ARCH_V6K |
| 3020 | || arch == TAG_CPU_ARCH_V7 |
| 3021 | || arch == TAG_CPU_ARCH_V7E_M; |
| 3022 | } |
| 3023 | |
| 3024 | static bfd_boolean |
| 3025 | arch_has_thumb2_nop (struct elf32_arm_link_hash_table *globals) |
| 3026 | { |
| 3027 | const int arch = bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, |
| 3028 | Tag_CPU_arch); |
| 3029 | return (arch == TAG_CPU_ARCH_V6T2 || arch == TAG_CPU_ARCH_V7 |
| 3030 | || arch == TAG_CPU_ARCH_V7E_M); |
| 3031 | } |
| 3032 | |
| 3033 | static bfd_boolean |
| 3034 | arm_stub_is_thumb (enum elf32_arm_stub_type stub_type) |
| 3035 | { |
| 3036 | switch (stub_type) |
| 3037 | { |
| 3038 | case arm_stub_long_branch_thumb_only: |
| 3039 | case arm_stub_long_branch_v4t_thumb_arm: |
| 3040 | case arm_stub_short_branch_v4t_thumb_arm: |
| 3041 | case arm_stub_long_branch_v4t_thumb_arm_pic: |
| 3042 | case arm_stub_long_branch_thumb_only_pic: |
| 3043 | return TRUE; |
| 3044 | case arm_stub_none: |
| 3045 | BFD_FAIL (); |
| 3046 | return FALSE; |
| 3047 | break; |
| 3048 | default: |
| 3049 | return FALSE; |
| 3050 | } |
| 3051 | } |
| 3052 | |
| 3053 | /* Determine the type of stub needed, if any, for a call. */ |
| 3054 | |
| 3055 | static enum elf32_arm_stub_type |
| 3056 | arm_type_of_stub (struct bfd_link_info *info, |
| 3057 | asection *input_sec, |
| 3058 | const Elf_Internal_Rela *rel, |
| 3059 | int *actual_st_type, |
| 3060 | struct elf32_arm_link_hash_entry *hash, |
| 3061 | bfd_vma destination, |
| 3062 | asection *sym_sec, |
| 3063 | bfd *input_bfd, |
| 3064 | const char *name) |
| 3065 | { |
| 3066 | bfd_vma location; |
| 3067 | bfd_signed_vma branch_offset; |
| 3068 | unsigned int r_type; |
| 3069 | struct elf32_arm_link_hash_table * globals; |
| 3070 | int thumb2; |
| 3071 | int thumb_only; |
| 3072 | enum elf32_arm_stub_type stub_type = arm_stub_none; |
| 3073 | int use_plt = 0; |
| 3074 | int st_type = *actual_st_type; |
| 3075 | |
| 3076 | /* We don't know the actual type of destination in case it is of |
| 3077 | type STT_SECTION: give up. */ |
| 3078 | if (st_type == STT_SECTION) |
| 3079 | return stub_type; |
| 3080 | |
| 3081 | globals = elf32_arm_hash_table (info); |
| 3082 | if (globals == NULL) |
| 3083 | return stub_type; |
| 3084 | |
| 3085 | thumb_only = using_thumb_only (globals); |
| 3086 | |
| 3087 | thumb2 = using_thumb2 (globals); |
| 3088 | |
| 3089 | /* Determine where the call point is. */ |
| 3090 | location = (input_sec->output_offset |
| 3091 | + input_sec->output_section->vma |
| 3092 | + rel->r_offset); |
| 3093 | |
| 3094 | r_type = ELF32_R_TYPE (rel->r_info); |
| 3095 | |
| 3096 | /* Keep a simpler condition, for the sake of clarity. */ |
| 3097 | if (globals->splt != NULL |
| 3098 | && hash != NULL |
| 3099 | && hash->root.plt.offset != (bfd_vma) -1) |
| 3100 | { |
| 3101 | use_plt = 1; |
| 3102 | |
| 3103 | /* Note when dealing with PLT entries: the main PLT stub is in |
| 3104 | ARM mode, so if the branch is in Thumb mode, another |
| 3105 | Thumb->ARM stub will be inserted later just before the ARM |
| 3106 | PLT stub. We don't take this extra distance into account |
| 3107 | here, because if a long branch stub is needed, we'll add a |
| 3108 | Thumb->Arm one and branch directly to the ARM PLT entry |
| 3109 | because it avoids spreading offset corrections in several |
| 3110 | places. */ |
| 3111 | |
| 3112 | destination = (globals->splt->output_section->vma |
| 3113 | + globals->splt->output_offset |
| 3114 | + hash->root.plt.offset); |
| 3115 | st_type = STT_FUNC; |
| 3116 | } |
| 3117 | |
| 3118 | branch_offset = (bfd_signed_vma)(destination - location); |
| 3119 | |
| 3120 | if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24) |
| 3121 | { |
| 3122 | /* Handle cases where: |
| 3123 | - this call goes too far (different Thumb/Thumb2 max |
| 3124 | distance) |
| 3125 | - it's a Thumb->Arm call and blx is not available, or it's a |
| 3126 | Thumb->Arm branch (not bl). A stub is needed in this case, |
| 3127 | but only if this call is not through a PLT entry. Indeed, |
| 3128 | PLT stubs handle mode switching already. |
| 3129 | */ |
| 3130 | if ((!thumb2 |
| 3131 | && (branch_offset > THM_MAX_FWD_BRANCH_OFFSET |
| 3132 | || (branch_offset < THM_MAX_BWD_BRANCH_OFFSET))) |
| 3133 | || (thumb2 |
| 3134 | && (branch_offset > THM2_MAX_FWD_BRANCH_OFFSET |
| 3135 | || (branch_offset < THM2_MAX_BWD_BRANCH_OFFSET))) |
| 3136 | || ((st_type != STT_ARM_TFUNC) |
| 3137 | && (((r_type == R_ARM_THM_CALL) && !globals->use_blx) |
| 3138 | || (r_type == R_ARM_THM_JUMP24)) |
| 3139 | && !use_plt)) |
| 3140 | { |
| 3141 | if (st_type == STT_ARM_TFUNC) |
| 3142 | { |
| 3143 | /* Thumb to thumb. */ |
| 3144 | if (!thumb_only) |
| 3145 | { |
| 3146 | stub_type = (info->shared | globals->pic_veneer) |
| 3147 | /* PIC stubs. */ |
| 3148 | ? ((globals->use_blx |
| 3149 | && (r_type ==R_ARM_THM_CALL)) |
| 3150 | /* V5T and above. Stub starts with ARM code, so |
| 3151 | we must be able to switch mode before |
| 3152 | reaching it, which is only possible for 'bl' |
| 3153 | (ie R_ARM_THM_CALL relocation). */ |
| 3154 | ? arm_stub_long_branch_any_thumb_pic |
| 3155 | /* On V4T, use Thumb code only. */ |
| 3156 | : arm_stub_long_branch_v4t_thumb_thumb_pic) |
| 3157 | |
| 3158 | /* non-PIC stubs. */ |
| 3159 | : ((globals->use_blx |
| 3160 | && (r_type ==R_ARM_THM_CALL)) |
| 3161 | /* V5T and above. */ |
| 3162 | ? arm_stub_long_branch_any_any |
| 3163 | /* V4T. */ |
| 3164 | : arm_stub_long_branch_v4t_thumb_thumb); |
| 3165 | } |
| 3166 | else |
| 3167 | { |
| 3168 | stub_type = (info->shared | globals->pic_veneer) |
| 3169 | /* PIC stub. */ |
| 3170 | ? arm_stub_long_branch_thumb_only_pic |
| 3171 | /* non-PIC stub. */ |
| 3172 | : arm_stub_long_branch_thumb_only; |
| 3173 | } |
| 3174 | } |
| 3175 | else |
| 3176 | { |
| 3177 | /* Thumb to arm. */ |
| 3178 | if (sym_sec != NULL |
| 3179 | && sym_sec->owner != NULL |
| 3180 | && !INTERWORK_FLAG (sym_sec->owner)) |
| 3181 | { |
| 3182 | (*_bfd_error_handler) |
| 3183 | (_("%B(%s): warning: interworking not enabled.\n" |
| 3184 | " first occurrence: %B: Thumb call to ARM"), |
| 3185 | sym_sec->owner, input_bfd, name); |
| 3186 | } |
| 3187 | |
| 3188 | stub_type = (info->shared | globals->pic_veneer) |
| 3189 | /* PIC stubs. */ |
| 3190 | ? ((globals->use_blx |
| 3191 | && (r_type ==R_ARM_THM_CALL)) |
| 3192 | /* V5T and above. */ |
| 3193 | ? arm_stub_long_branch_any_arm_pic |
| 3194 | /* V4T PIC stub. */ |
| 3195 | : arm_stub_long_branch_v4t_thumb_arm_pic) |
| 3196 | |
| 3197 | /* non-PIC stubs. */ |
| 3198 | : ((globals->use_blx |
| 3199 | && (r_type ==R_ARM_THM_CALL)) |
| 3200 | /* V5T and above. */ |
| 3201 | ? arm_stub_long_branch_any_any |
| 3202 | /* V4T. */ |
| 3203 | : arm_stub_long_branch_v4t_thumb_arm); |
| 3204 | |
| 3205 | /* Handle v4t short branches. */ |
| 3206 | if ((stub_type == arm_stub_long_branch_v4t_thumb_arm) |
| 3207 | && (branch_offset <= THM_MAX_FWD_BRANCH_OFFSET) |
| 3208 | && (branch_offset >= THM_MAX_BWD_BRANCH_OFFSET)) |
| 3209 | stub_type = arm_stub_short_branch_v4t_thumb_arm; |
| 3210 | } |
| 3211 | } |
| 3212 | } |
| 3213 | else if (r_type == R_ARM_CALL |
| 3214 | || r_type == R_ARM_JUMP24 |
| 3215 | || r_type == R_ARM_PLT32) |
| 3216 | { |
| 3217 | if (st_type == STT_ARM_TFUNC) |
| 3218 | { |
| 3219 | /* Arm to thumb. */ |
| 3220 | |
| 3221 | if (sym_sec != NULL |
| 3222 | && sym_sec->owner != NULL |
| 3223 | && !INTERWORK_FLAG (sym_sec->owner)) |
| 3224 | { |
| 3225 | (*_bfd_error_handler) |
| 3226 | (_("%B(%s): warning: interworking not enabled.\n" |
| 3227 | " first occurrence: %B: ARM call to Thumb"), |
| 3228 | sym_sec->owner, input_bfd, name); |
| 3229 | } |
| 3230 | |
| 3231 | /* We have an extra 2-bytes reach because of |
| 3232 | the mode change (bit 24 (H) of BLX encoding). */ |
| 3233 | if (branch_offset > (ARM_MAX_FWD_BRANCH_OFFSET + 2) |
| 3234 | || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET) |
| 3235 | || ((r_type == R_ARM_CALL) && !globals->use_blx) |
| 3236 | || (r_type == R_ARM_JUMP24) |
| 3237 | || (r_type == R_ARM_PLT32)) |
| 3238 | { |
| 3239 | stub_type = (info->shared | globals->pic_veneer) |
| 3240 | /* PIC stubs. */ |
| 3241 | ? ((globals->use_blx) |
| 3242 | /* V5T and above. */ |
| 3243 | ? arm_stub_long_branch_any_thumb_pic |
| 3244 | /* V4T stub. */ |
| 3245 | : arm_stub_long_branch_v4t_arm_thumb_pic) |
| 3246 | |
| 3247 | /* non-PIC stubs. */ |
| 3248 | : ((globals->use_blx) |
| 3249 | /* V5T and above. */ |
| 3250 | ? arm_stub_long_branch_any_any |
| 3251 | /* V4T. */ |
| 3252 | : arm_stub_long_branch_v4t_arm_thumb); |
| 3253 | } |
| 3254 | } |
| 3255 | else |
| 3256 | { |
| 3257 | /* Arm to arm. */ |
| 3258 | if (branch_offset > ARM_MAX_FWD_BRANCH_OFFSET |
| 3259 | || (branch_offset < ARM_MAX_BWD_BRANCH_OFFSET)) |
| 3260 | { |
| 3261 | stub_type = (info->shared | globals->pic_veneer) |
| 3262 | /* PIC stubs. */ |
| 3263 | ? arm_stub_long_branch_any_arm_pic |
| 3264 | /* non-PIC stubs. */ |
| 3265 | : arm_stub_long_branch_any_any; |
| 3266 | } |
| 3267 | } |
| 3268 | } |
| 3269 | |
| 3270 | /* If a stub is needed, record the actual destination type. */ |
| 3271 | if (stub_type != arm_stub_none) |
| 3272 | *actual_st_type = st_type; |
| 3273 | |
| 3274 | return stub_type; |
| 3275 | } |
| 3276 | |
| 3277 | /* Build a name for an entry in the stub hash table. */ |
| 3278 | |
| 3279 | static char * |
| 3280 | elf32_arm_stub_name (const asection *input_section, |
| 3281 | const asection *sym_sec, |
| 3282 | const struct elf32_arm_link_hash_entry *hash, |
| 3283 | const Elf_Internal_Rela *rel, |
| 3284 | enum elf32_arm_stub_type stub_type) |
| 3285 | { |
| 3286 | char *stub_name; |
| 3287 | bfd_size_type len; |
| 3288 | |
| 3289 | if (hash) |
| 3290 | { |
| 3291 | len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 8 + 1 + 2 + 1; |
| 3292 | stub_name = (char *) bfd_malloc (len); |
| 3293 | if (stub_name != NULL) |
| 3294 | sprintf (stub_name, "%08x_%s+%x_%d", |
| 3295 | input_section->id & 0xffffffff, |
| 3296 | hash->root.root.root.string, |
| 3297 | (int) rel->r_addend & 0xffffffff, |
| 3298 | (int) stub_type); |
| 3299 | } |
| 3300 | else |
| 3301 | { |
| 3302 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1 + 2 + 1; |
| 3303 | stub_name = (char *) bfd_malloc (len); |
| 3304 | if (stub_name != NULL) |
| 3305 | sprintf (stub_name, "%08x_%x:%x+%x_%d", |
| 3306 | input_section->id & 0xffffffff, |
| 3307 | sym_sec->id & 0xffffffff, |
| 3308 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, |
| 3309 | (int) rel->r_addend & 0xffffffff, |
| 3310 | (int) stub_type); |
| 3311 | } |
| 3312 | |
| 3313 | return stub_name; |
| 3314 | } |
| 3315 | |
| 3316 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 3317 | creating the stub name takes a bit of time. */ |
| 3318 | |
| 3319 | static struct elf32_arm_stub_hash_entry * |
| 3320 | elf32_arm_get_stub_entry (const asection *input_section, |
| 3321 | const asection *sym_sec, |
| 3322 | struct elf_link_hash_entry *hash, |
| 3323 | const Elf_Internal_Rela *rel, |
| 3324 | struct elf32_arm_link_hash_table *htab, |
| 3325 | enum elf32_arm_stub_type stub_type) |
| 3326 | { |
| 3327 | struct elf32_arm_stub_hash_entry *stub_entry; |
| 3328 | struct elf32_arm_link_hash_entry *h = (struct elf32_arm_link_hash_entry *) hash; |
| 3329 | const asection *id_sec; |
| 3330 | |
| 3331 | if ((input_section->flags & SEC_CODE) == 0) |
| 3332 | return NULL; |
| 3333 | |
| 3334 | /* If this input section is part of a group of sections sharing one |
| 3335 | stub section, then use the id of the first section in the group. |
| 3336 | Stub names need to include a section id, as there may well be |
| 3337 | more than one stub used to reach say, printf, and we need to |
| 3338 | distinguish between them. */ |
| 3339 | id_sec = htab->stub_group[input_section->id].link_sec; |
| 3340 | |
| 3341 | if (h != NULL && h->stub_cache != NULL |
| 3342 | && h->stub_cache->h == h |
| 3343 | && h->stub_cache->id_sec == id_sec |
| 3344 | && h->stub_cache->stub_type == stub_type) |
| 3345 | { |
| 3346 | stub_entry = h->stub_cache; |
| 3347 | } |
| 3348 | else |
| 3349 | { |
| 3350 | char *stub_name; |
| 3351 | |
| 3352 | stub_name = elf32_arm_stub_name (id_sec, sym_sec, h, rel, stub_type); |
| 3353 | if (stub_name == NULL) |
| 3354 | return NULL; |
| 3355 | |
| 3356 | stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, |
| 3357 | stub_name, FALSE, FALSE); |
| 3358 | if (h != NULL) |
| 3359 | h->stub_cache = stub_entry; |
| 3360 | |
| 3361 | free (stub_name); |
| 3362 | } |
| 3363 | |
| 3364 | return stub_entry; |
| 3365 | } |
| 3366 | |
| 3367 | /* Find or create a stub section. Returns a pointer to the stub section, and |
| 3368 | the section to which the stub section will be attached (in *LINK_SEC_P). |
| 3369 | LINK_SEC_P may be NULL. */ |
| 3370 | |
| 3371 | static asection * |
| 3372 | elf32_arm_create_or_find_stub_sec (asection **link_sec_p, asection *section, |
| 3373 | struct elf32_arm_link_hash_table *htab) |
| 3374 | { |
| 3375 | asection *link_sec; |
| 3376 | asection *stub_sec; |
| 3377 | |
| 3378 | link_sec = htab->stub_group[section->id].link_sec; |
| 3379 | stub_sec = htab->stub_group[section->id].stub_sec; |
| 3380 | if (stub_sec == NULL) |
| 3381 | { |
| 3382 | stub_sec = htab->stub_group[link_sec->id].stub_sec; |
| 3383 | if (stub_sec == NULL) |
| 3384 | { |
| 3385 | size_t namelen; |
| 3386 | bfd_size_type len; |
| 3387 | char *s_name; |
| 3388 | |
| 3389 | namelen = strlen (link_sec->name); |
| 3390 | len = namelen + sizeof (STUB_SUFFIX); |
| 3391 | s_name = (char *) bfd_alloc (htab->stub_bfd, len); |
| 3392 | if (s_name == NULL) |
| 3393 | return NULL; |
| 3394 | |
| 3395 | memcpy (s_name, link_sec->name, namelen); |
| 3396 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 3397 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); |
| 3398 | if (stub_sec == NULL) |
| 3399 | return NULL; |
| 3400 | htab->stub_group[link_sec->id].stub_sec = stub_sec; |
| 3401 | } |
| 3402 | htab->stub_group[section->id].stub_sec = stub_sec; |
| 3403 | } |
| 3404 | |
| 3405 | if (link_sec_p) |
| 3406 | *link_sec_p = link_sec; |
| 3407 | |
| 3408 | return stub_sec; |
| 3409 | } |
| 3410 | |
| 3411 | /* Add a new stub entry to the stub hash. Not all fields of the new |
| 3412 | stub entry are initialised. */ |
| 3413 | |
| 3414 | static struct elf32_arm_stub_hash_entry * |
| 3415 | elf32_arm_add_stub (const char *stub_name, |
| 3416 | asection *section, |
| 3417 | struct elf32_arm_link_hash_table *htab) |
| 3418 | { |
| 3419 | asection *link_sec; |
| 3420 | asection *stub_sec; |
| 3421 | struct elf32_arm_stub_hash_entry *stub_entry; |
| 3422 | |
| 3423 | stub_sec = elf32_arm_create_or_find_stub_sec (&link_sec, section, htab); |
| 3424 | if (stub_sec == NULL) |
| 3425 | return NULL; |
| 3426 | |
| 3427 | /* Enter this entry into the linker stub hash table. */ |
| 3428 | stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| 3429 | TRUE, FALSE); |
| 3430 | if (stub_entry == NULL) |
| 3431 | { |
| 3432 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), |
| 3433 | section->owner, |
| 3434 | stub_name); |
| 3435 | return NULL; |
| 3436 | } |
| 3437 | |
| 3438 | stub_entry->stub_sec = stub_sec; |
| 3439 | stub_entry->stub_offset = 0; |
| 3440 | stub_entry->id_sec = link_sec; |
| 3441 | |
| 3442 | return stub_entry; |
| 3443 | } |
| 3444 | |
| 3445 | /* Store an Arm insn into an output section not processed by |
| 3446 | elf32_arm_write_section. */ |
| 3447 | |
| 3448 | static void |
| 3449 | put_arm_insn (struct elf32_arm_link_hash_table * htab, |
| 3450 | bfd * output_bfd, bfd_vma val, void * ptr) |
| 3451 | { |
| 3452 | if (htab->byteswap_code != bfd_little_endian (output_bfd)) |
| 3453 | bfd_putl32 (val, ptr); |
| 3454 | else |
| 3455 | bfd_putb32 (val, ptr); |
| 3456 | } |
| 3457 | |
| 3458 | /* Store a 16-bit Thumb insn into an output section not processed by |
| 3459 | elf32_arm_write_section. */ |
| 3460 | |
| 3461 | static void |
| 3462 | put_thumb_insn (struct elf32_arm_link_hash_table * htab, |
| 3463 | bfd * output_bfd, bfd_vma val, void * ptr) |
| 3464 | { |
| 3465 | if (htab->byteswap_code != bfd_little_endian (output_bfd)) |
| 3466 | bfd_putl16 (val, ptr); |
| 3467 | else |
| 3468 | bfd_putb16 (val, ptr); |
| 3469 | } |
| 3470 | |
| 3471 | static bfd_reloc_status_type elf32_arm_final_link_relocate |
| 3472 | (reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, |
| 3473 | Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *, |
| 3474 | const char *, int, struct elf_link_hash_entry *, bfd_boolean *, char **); |
| 3475 | |
| 3476 | static unsigned int |
| 3477 | arm_stub_required_alignment (enum elf32_arm_stub_type stub_type) |
| 3478 | { |
| 3479 | switch (stub_type) |
| 3480 | { |
| 3481 | case arm_stub_a8_veneer_b_cond: |
| 3482 | case arm_stub_a8_veneer_b: |
| 3483 | case arm_stub_a8_veneer_bl: |
| 3484 | return 2; |
| 3485 | |
| 3486 | case arm_stub_long_branch_any_any: |
| 3487 | case arm_stub_long_branch_v4t_arm_thumb: |
| 3488 | case arm_stub_long_branch_thumb_only: |
| 3489 | case arm_stub_long_branch_v4t_thumb_thumb: |
| 3490 | case arm_stub_long_branch_v4t_thumb_arm: |
| 3491 | case arm_stub_short_branch_v4t_thumb_arm: |
| 3492 | case arm_stub_long_branch_any_arm_pic: |
| 3493 | case arm_stub_long_branch_any_thumb_pic: |
| 3494 | case arm_stub_long_branch_v4t_thumb_thumb_pic: |
| 3495 | case arm_stub_long_branch_v4t_arm_thumb_pic: |
| 3496 | case arm_stub_long_branch_v4t_thumb_arm_pic: |
| 3497 | case arm_stub_long_branch_thumb_only_pic: |
| 3498 | case arm_stub_a8_veneer_blx: |
| 3499 | return 4; |
| 3500 | |
| 3501 | default: |
| 3502 | abort (); /* Should be unreachable. */ |
| 3503 | } |
| 3504 | } |
| 3505 | |
| 3506 | static bfd_boolean |
| 3507 | arm_build_one_stub (struct bfd_hash_entry *gen_entry, |
| 3508 | void * in_arg) |
| 3509 | { |
| 3510 | #define MAXRELOCS 2 |
| 3511 | struct elf32_arm_stub_hash_entry *stub_entry; |
| 3512 | struct elf32_arm_link_hash_table *globals; |
| 3513 | struct bfd_link_info *info; |
| 3514 | asection *stub_sec; |
| 3515 | bfd *stub_bfd; |
| 3516 | bfd_byte *loc; |
| 3517 | bfd_vma sym_value; |
| 3518 | int template_size; |
| 3519 | int size; |
| 3520 | const insn_sequence *template_sequence; |
| 3521 | int i; |
| 3522 | int stub_reloc_idx[MAXRELOCS] = {-1, -1}; |
| 3523 | int stub_reloc_offset[MAXRELOCS] = {0, 0}; |
| 3524 | int nrelocs = 0; |
| 3525 | |
| 3526 | /* Massage our args to the form they really have. */ |
| 3527 | stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry; |
| 3528 | info = (struct bfd_link_info *) in_arg; |
| 3529 | |
| 3530 | globals = elf32_arm_hash_table (info); |
| 3531 | if (globals == NULL) |
| 3532 | return FALSE; |
| 3533 | |
| 3534 | stub_sec = stub_entry->stub_sec; |
| 3535 | |
| 3536 | if ((globals->fix_cortex_a8 < 0) |
| 3537 | != (arm_stub_required_alignment (stub_entry->stub_type) == 2)) |
| 3538 | /* We have to do less-strictly-aligned fixes last. */ |
| 3539 | return TRUE; |
| 3540 | |
| 3541 | /* Make a note of the offset within the stubs for this entry. */ |
| 3542 | stub_entry->stub_offset = stub_sec->size; |
| 3543 | loc = stub_sec->contents + stub_entry->stub_offset; |
| 3544 | |
| 3545 | stub_bfd = stub_sec->owner; |
| 3546 | |
| 3547 | /* This is the address of the stub destination. */ |
| 3548 | sym_value = (stub_entry->target_value |
| 3549 | + stub_entry->target_section->output_offset |
| 3550 | + stub_entry->target_section->output_section->vma); |
| 3551 | |
| 3552 | template_sequence = stub_entry->stub_template; |
| 3553 | template_size = stub_entry->stub_template_size; |
| 3554 | |
| 3555 | size = 0; |
| 3556 | for (i = 0; i < template_size; i++) |
| 3557 | { |
| 3558 | switch (template_sequence[i].type) |
| 3559 | { |
| 3560 | case THUMB16_TYPE: |
| 3561 | { |
| 3562 | bfd_vma data = (bfd_vma) template_sequence[i].data; |
| 3563 | if (template_sequence[i].reloc_addend != 0) |
| 3564 | { |
| 3565 | /* We've borrowed the reloc_addend field to mean we should |
| 3566 | insert a condition code into this (Thumb-1 branch) |
| 3567 | instruction. See THUMB16_BCOND_INSN. */ |
| 3568 | BFD_ASSERT ((data & 0xff00) == 0xd000); |
| 3569 | data |= ((stub_entry->orig_insn >> 22) & 0xf) << 8; |
| 3570 | } |
| 3571 | bfd_put_16 (stub_bfd, data, loc + size); |
| 3572 | size += 2; |
| 3573 | } |
| 3574 | break; |
| 3575 | |
| 3576 | case THUMB32_TYPE: |
| 3577 | bfd_put_16 (stub_bfd, |
| 3578 | (template_sequence[i].data >> 16) & 0xffff, |
| 3579 | loc + size); |
| 3580 | bfd_put_16 (stub_bfd, template_sequence[i].data & 0xffff, |
| 3581 | loc + size + 2); |
| 3582 | if (template_sequence[i].r_type != R_ARM_NONE) |
| 3583 | { |
| 3584 | stub_reloc_idx[nrelocs] = i; |
| 3585 | stub_reloc_offset[nrelocs++] = size; |
| 3586 | } |
| 3587 | size += 4; |
| 3588 | break; |
| 3589 | |
| 3590 | case ARM_TYPE: |
| 3591 | bfd_put_32 (stub_bfd, template_sequence[i].data, |
| 3592 | loc + size); |
| 3593 | /* Handle cases where the target is encoded within the |
| 3594 | instruction. */ |
| 3595 | if (template_sequence[i].r_type == R_ARM_JUMP24) |
| 3596 | { |
| 3597 | stub_reloc_idx[nrelocs] = i; |
| 3598 | stub_reloc_offset[nrelocs++] = size; |
| 3599 | } |
| 3600 | size += 4; |
| 3601 | break; |
| 3602 | |
| 3603 | case DATA_TYPE: |
| 3604 | bfd_put_32 (stub_bfd, template_sequence[i].data, loc + size); |
| 3605 | stub_reloc_idx[nrelocs] = i; |
| 3606 | stub_reloc_offset[nrelocs++] = size; |
| 3607 | size += 4; |
| 3608 | break; |
| 3609 | |
| 3610 | default: |
| 3611 | BFD_FAIL (); |
| 3612 | return FALSE; |
| 3613 | } |
| 3614 | } |
| 3615 | |
| 3616 | stub_sec->size += size; |
| 3617 | |
| 3618 | /* Stub size has already been computed in arm_size_one_stub. Check |
| 3619 | consistency. */ |
| 3620 | BFD_ASSERT (size == stub_entry->stub_size); |
| 3621 | |
| 3622 | /* Destination is Thumb. Force bit 0 to 1 to reflect this. */ |
| 3623 | if (stub_entry->st_type == STT_ARM_TFUNC) |
| 3624 | sym_value |= 1; |
| 3625 | |
| 3626 | /* Assume there is at least one and at most MAXRELOCS entries to relocate |
| 3627 | in each stub. */ |
| 3628 | BFD_ASSERT (nrelocs != 0 && nrelocs <= MAXRELOCS); |
| 3629 | |
| 3630 | for (i = 0; i < nrelocs; i++) |
| 3631 | if (template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_JUMP24 |
| 3632 | || template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_JUMP19 |
| 3633 | || template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_CALL |
| 3634 | || template_sequence[stub_reloc_idx[i]].r_type == R_ARM_THM_XPC22) |
| 3635 | { |
| 3636 | Elf_Internal_Rela rel; |
| 3637 | bfd_boolean unresolved_reloc; |
| 3638 | char *error_message; |
| 3639 | int sym_flags |
| 3640 | = (template_sequence[stub_reloc_idx[i]].r_type != R_ARM_THM_XPC22) |
| 3641 | ? STT_ARM_TFUNC : 0; |
| 3642 | bfd_vma points_to = sym_value + stub_entry->target_addend; |
| 3643 | |
| 3644 | rel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i]; |
| 3645 | rel.r_info = ELF32_R_INFO (0, |
| 3646 | template_sequence[stub_reloc_idx[i]].r_type); |
| 3647 | rel.r_addend = template_sequence[stub_reloc_idx[i]].reloc_addend; |
| 3648 | |
| 3649 | if (stub_entry->stub_type == arm_stub_a8_veneer_b_cond && i == 0) |
| 3650 | /* The first relocation in the elf32_arm_stub_a8_veneer_b_cond[] |
| 3651 | template should refer back to the instruction after the original |
| 3652 | branch. */ |
| 3653 | points_to = sym_value; |
| 3654 | |
| 3655 | /* There may be unintended consequences if this is not true. */ |
| 3656 | BFD_ASSERT (stub_entry->h == NULL); |
| 3657 | |
| 3658 | /* Note: _bfd_final_link_relocate doesn't handle these relocations |
| 3659 | properly. We should probably use this function unconditionally, |
| 3660 | rather than only for certain relocations listed in the enclosing |
| 3661 | conditional, for the sake of consistency. */ |
| 3662 | elf32_arm_final_link_relocate (elf32_arm_howto_from_type |
| 3663 | (template_sequence[stub_reloc_idx[i]].r_type), |
| 3664 | stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel, |
| 3665 | points_to, info, stub_entry->target_section, "", sym_flags, |
| 3666 | (struct elf_link_hash_entry *) stub_entry->h, &unresolved_reloc, |
| 3667 | &error_message); |
| 3668 | } |
| 3669 | else |
| 3670 | { |
| 3671 | Elf_Internal_Rela rel; |
| 3672 | bfd_boolean unresolved_reloc; |
| 3673 | char *error_message; |
| 3674 | bfd_vma points_to = sym_value + stub_entry->target_addend |
| 3675 | + template_sequence[stub_reloc_idx[i]].reloc_addend; |
| 3676 | |
| 3677 | rel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i]; |
| 3678 | rel.r_info = ELF32_R_INFO (0, |
| 3679 | template_sequence[stub_reloc_idx[i]].r_type); |
| 3680 | rel.r_addend = 0; |
| 3681 | |
| 3682 | elf32_arm_final_link_relocate (elf32_arm_howto_from_type |
| 3683 | (template_sequence[stub_reloc_idx[i]].r_type), |
| 3684 | stub_bfd, info->output_bfd, stub_sec, stub_sec->contents, &rel, |
| 3685 | points_to, info, stub_entry->target_section, "", stub_entry->st_type, |
| 3686 | (struct elf_link_hash_entry *) stub_entry->h, &unresolved_reloc, |
| 3687 | &error_message); |
| 3688 | } |
| 3689 | |
| 3690 | return TRUE; |
| 3691 | #undef MAXRELOCS |
| 3692 | } |
| 3693 | |
| 3694 | /* Calculate the template, template size and instruction size for a stub. |
| 3695 | Return value is the instruction size. */ |
| 3696 | |
| 3697 | static unsigned int |
| 3698 | find_stub_size_and_template (enum elf32_arm_stub_type stub_type, |
| 3699 | const insn_sequence **stub_template, |
| 3700 | int *stub_template_size) |
| 3701 | { |
| 3702 | const insn_sequence *template_sequence = NULL; |
| 3703 | int template_size = 0, i; |
| 3704 | unsigned int size; |
| 3705 | |
| 3706 | template_sequence = stub_definitions[stub_type].template_sequence; |
| 3707 | if (stub_template) |
| 3708 | *stub_template = template_sequence; |
| 3709 | |
| 3710 | template_size = stub_definitions[stub_type].template_size; |
| 3711 | if (stub_template_size) |
| 3712 | *stub_template_size = template_size; |
| 3713 | |
| 3714 | size = 0; |
| 3715 | for (i = 0; i < template_size; i++) |
| 3716 | { |
| 3717 | switch (template_sequence[i].type) |
| 3718 | { |
| 3719 | case THUMB16_TYPE: |
| 3720 | size += 2; |
| 3721 | break; |
| 3722 | |
| 3723 | case ARM_TYPE: |
| 3724 | case THUMB32_TYPE: |
| 3725 | case DATA_TYPE: |
| 3726 | size += 4; |
| 3727 | break; |
| 3728 | |
| 3729 | default: |
| 3730 | BFD_FAIL (); |
| 3731 | return 0; |
| 3732 | } |
| 3733 | } |
| 3734 | |
| 3735 | return size; |
| 3736 | } |
| 3737 | |
| 3738 | /* As above, but don't actually build the stub. Just bump offset so |
| 3739 | we know stub section sizes. */ |
| 3740 | |
| 3741 | static bfd_boolean |
| 3742 | arm_size_one_stub (struct bfd_hash_entry *gen_entry, |
| 3743 | void *in_arg ATTRIBUTE_UNUSED) |
| 3744 | { |
| 3745 | struct elf32_arm_stub_hash_entry *stub_entry; |
| 3746 | const insn_sequence *template_sequence; |
| 3747 | int template_size, size; |
| 3748 | |
| 3749 | /* Massage our args to the form they really have. */ |
| 3750 | stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry; |
| 3751 | |
| 3752 | BFD_ASSERT((stub_entry->stub_type > arm_stub_none) |
| 3753 | && stub_entry->stub_type < ARRAY_SIZE(stub_definitions)); |
| 3754 | |
| 3755 | size = find_stub_size_and_template (stub_entry->stub_type, &template_sequence, |
| 3756 | &template_size); |
| 3757 | |
| 3758 | stub_entry->stub_size = size; |
| 3759 | stub_entry->stub_template = template_sequence; |
| 3760 | stub_entry->stub_template_size = template_size; |
| 3761 | |
| 3762 | size = (size + 7) & ~7; |
| 3763 | stub_entry->stub_sec->size += size; |
| 3764 | |
| 3765 | return TRUE; |
| 3766 | } |
| 3767 | |
| 3768 | /* External entry points for sizing and building linker stubs. */ |
| 3769 | |
| 3770 | /* Set up various things so that we can make a list of input sections |
| 3771 | for each output section included in the link. Returns -1 on error, |
| 3772 | 0 when no stubs will be needed, and 1 on success. */ |
| 3773 | |
| 3774 | int |
| 3775 | elf32_arm_setup_section_lists (bfd *output_bfd, |
| 3776 | struct bfd_link_info *info) |
| 3777 | { |
| 3778 | bfd *input_bfd; |
| 3779 | unsigned int bfd_count; |
| 3780 | int top_id, top_index; |
| 3781 | asection *section; |
| 3782 | asection **input_list, **list; |
| 3783 | bfd_size_type amt; |
| 3784 | struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info); |
| 3785 | |
| 3786 | if (htab == NULL) |
| 3787 | return 0; |
| 3788 | if (! is_elf_hash_table (htab)) |
| 3789 | return 0; |
| 3790 | |
| 3791 | /* Count the number of input BFDs and find the top input section id. */ |
| 3792 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| 3793 | input_bfd != NULL; |
| 3794 | input_bfd = input_bfd->link_next) |
| 3795 | { |
| 3796 | bfd_count += 1; |
| 3797 | for (section = input_bfd->sections; |
| 3798 | section != NULL; |
| 3799 | section = section->next) |
| 3800 | { |
| 3801 | if (top_id < section->id) |
| 3802 | top_id = section->id; |
| 3803 | } |
| 3804 | } |
| 3805 | htab->bfd_count = bfd_count; |
| 3806 | |
| 3807 | amt = sizeof (struct map_stub) * (top_id + 1); |
| 3808 | htab->stub_group = (struct map_stub *) bfd_zmalloc (amt); |
| 3809 | if (htab->stub_group == NULL) |
| 3810 | return -1; |
| 3811 | htab->top_id = top_id; |
| 3812 | |
| 3813 | /* We can't use output_bfd->section_count here to find the top output |
| 3814 | section index as some sections may have been removed, and |
| 3815 | _bfd_strip_section_from_output doesn't renumber the indices. */ |
| 3816 | for (section = output_bfd->sections, top_index = 0; |
| 3817 | section != NULL; |
| 3818 | section = section->next) |
| 3819 | { |
| 3820 | if (top_index < section->index) |
| 3821 | top_index = section->index; |
| 3822 | } |
| 3823 | |
| 3824 | htab->top_index = top_index; |
| 3825 | amt = sizeof (asection *) * (top_index + 1); |
| 3826 | input_list = (asection **) bfd_malloc (amt); |
| 3827 | htab->input_list = input_list; |
| 3828 | if (input_list == NULL) |
| 3829 | return -1; |
| 3830 | |
| 3831 | /* For sections we aren't interested in, mark their entries with a |
| 3832 | value we can check later. */ |
| 3833 | list = input_list + top_index; |
| 3834 | do |
| 3835 | *list = bfd_abs_section_ptr; |
| 3836 | while (list-- != input_list); |
| 3837 | |
| 3838 | for (section = output_bfd->sections; |
| 3839 | section != NULL; |
| 3840 | section = section->next) |
| 3841 | { |
| 3842 | if ((section->flags & SEC_CODE) != 0) |
| 3843 | input_list[section->index] = NULL; |
| 3844 | } |
| 3845 | |
| 3846 | return 1; |
| 3847 | } |
| 3848 | |
| 3849 | /* The linker repeatedly calls this function for each input section, |
| 3850 | in the order that input sections are linked into output sections. |
| 3851 | Build lists of input sections to determine groupings between which |
| 3852 | we may insert linker stubs. */ |
| 3853 | |
| 3854 | void |
| 3855 | elf32_arm_next_input_section (struct bfd_link_info *info, |
| 3856 | asection *isec) |
| 3857 | { |
| 3858 | struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info); |
| 3859 | |
| 3860 | if (htab == NULL) |
| 3861 | return; |
| 3862 | |
| 3863 | if (isec->output_section->index <= htab->top_index) |
| 3864 | { |
| 3865 | asection **list = htab->input_list + isec->output_section->index; |
| 3866 | |
| 3867 | if (*list != bfd_abs_section_ptr && (isec->flags & SEC_CODE) != 0) |
| 3868 | { |
| 3869 | /* Steal the link_sec pointer for our list. */ |
| 3870 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| 3871 | /* This happens to make the list in reverse order, |
| 3872 | which we reverse later. */ |
| 3873 | PREV_SEC (isec) = *list; |
| 3874 | *list = isec; |
| 3875 | } |
| 3876 | } |
| 3877 | } |
| 3878 | |
| 3879 | /* See whether we can group stub sections together. Grouping stub |
| 3880 | sections may result in fewer stubs. More importantly, we need to |
| 3881 | put all .init* and .fini* stubs at the end of the .init or |
| 3882 | .fini output sections respectively, because glibc splits the |
| 3883 | _init and _fini functions into multiple parts. Putting a stub in |
| 3884 | the middle of a function is not a good idea. */ |
| 3885 | |
| 3886 | static void |
| 3887 | group_sections (struct elf32_arm_link_hash_table *htab, |
| 3888 | bfd_size_type stub_group_size, |
| 3889 | bfd_boolean stubs_always_after_branch) |
| 3890 | { |
| 3891 | asection **list = htab->input_list; |
| 3892 | |
| 3893 | do |
| 3894 | { |
| 3895 | asection *tail = *list; |
| 3896 | asection *head; |
| 3897 | |
| 3898 | if (tail == bfd_abs_section_ptr) |
| 3899 | continue; |
| 3900 | |
| 3901 | /* Reverse the list: we must avoid placing stubs at the |
| 3902 | beginning of the section because the beginning of the text |
| 3903 | section may be required for an interrupt vector in bare metal |
| 3904 | code. */ |
| 3905 | #define NEXT_SEC PREV_SEC |
| 3906 | head = NULL; |
| 3907 | while (tail != NULL) |
| 3908 | { |
| 3909 | /* Pop from tail. */ |
| 3910 | asection *item = tail; |
| 3911 | tail = PREV_SEC (item); |
| 3912 | |
| 3913 | /* Push on head. */ |
| 3914 | NEXT_SEC (item) = head; |
| 3915 | head = item; |
| 3916 | } |
| 3917 | |
| 3918 | while (head != NULL) |
| 3919 | { |
| 3920 | asection *curr; |
| 3921 | asection *next; |
| 3922 | bfd_vma stub_group_start = head->output_offset; |
| 3923 | bfd_vma end_of_next; |
| 3924 | |
| 3925 | curr = head; |
| 3926 | while (NEXT_SEC (curr) != NULL) |
| 3927 | { |
| 3928 | next = NEXT_SEC (curr); |
| 3929 | end_of_next = next->output_offset + next->size; |
| 3930 | if (end_of_next - stub_group_start >= stub_group_size) |
| 3931 | /* End of NEXT is too far from start, so stop. */ |
| 3932 | break; |
| 3933 | /* Add NEXT to the group. */ |
| 3934 | curr = next; |
| 3935 | } |
| 3936 | |
| 3937 | /* OK, the size from the start to the start of CURR is less |
| 3938 | than stub_group_size and thus can be handled by one stub |
| 3939 | section. (Or the head section is itself larger than |
| 3940 | stub_group_size, in which case we may be toast.) |
| 3941 | We should really be keeping track of the total size of |
| 3942 | stubs added here, as stubs contribute to the final output |
| 3943 | section size. */ |
| 3944 | do |
| 3945 | { |
| 3946 | next = NEXT_SEC (head); |
| 3947 | /* Set up this stub group. */ |
| 3948 | htab->stub_group[head->id].link_sec = curr; |
| 3949 | } |
| 3950 | while (head != curr && (head = next) != NULL); |
| 3951 | |
| 3952 | /* But wait, there's more! Input sections up to stub_group_size |
| 3953 | bytes after the stub section can be handled by it too. */ |
| 3954 | if (!stubs_always_after_branch) |
| 3955 | { |
| 3956 | stub_group_start = curr->output_offset + curr->size; |
| 3957 | |
| 3958 | while (next != NULL) |
| 3959 | { |
| 3960 | end_of_next = next->output_offset + next->size; |
| 3961 | if (end_of_next - stub_group_start >= stub_group_size) |
| 3962 | /* End of NEXT is too far from stubs, so stop. */ |
| 3963 | break; |
| 3964 | /* Add NEXT to the stub group. */ |
| 3965 | head = next; |
| 3966 | next = NEXT_SEC (head); |
| 3967 | htab->stub_group[head->id].link_sec = curr; |
| 3968 | } |
| 3969 | } |
| 3970 | head = next; |
| 3971 | } |
| 3972 | } |
| 3973 | while (list++ != htab->input_list + htab->top_index); |
| 3974 | |
| 3975 | free (htab->input_list); |
| 3976 | #undef PREV_SEC |
| 3977 | #undef NEXT_SEC |
| 3978 | } |
| 3979 | |
| 3980 | /* Comparison function for sorting/searching relocations relating to Cortex-A8 |
| 3981 | erratum fix. */ |
| 3982 | |
| 3983 | static int |
| 3984 | a8_reloc_compare (const void *a, const void *b) |
| 3985 | { |
| 3986 | const struct a8_erratum_reloc *ra = (const struct a8_erratum_reloc *) a; |
| 3987 | const struct a8_erratum_reloc *rb = (const struct a8_erratum_reloc *) b; |
| 3988 | |
| 3989 | if (ra->from < rb->from) |
| 3990 | return -1; |
| 3991 | else if (ra->from > rb->from) |
| 3992 | return 1; |
| 3993 | else |
| 3994 | return 0; |
| 3995 | } |
| 3996 | |
| 3997 | static struct elf_link_hash_entry *find_thumb_glue (struct bfd_link_info *, |
| 3998 | const char *, char **); |
| 3999 | |
| 4000 | /* Helper function to scan code for sequences which might trigger the Cortex-A8 |
| 4001 | branch/TLB erratum. Fill in the table described by A8_FIXES_P, |
| 4002 | NUM_A8_FIXES_P, A8_FIX_TABLE_SIZE_P. Returns true if an error occurs, false |
| 4003 | otherwise. */ |
| 4004 | |
| 4005 | static bfd_boolean |
| 4006 | cortex_a8_erratum_scan (bfd *input_bfd, |
| 4007 | struct bfd_link_info *info, |
| 4008 | struct a8_erratum_fix **a8_fixes_p, |
| 4009 | unsigned int *num_a8_fixes_p, |
| 4010 | unsigned int *a8_fix_table_size_p, |
| 4011 | struct a8_erratum_reloc *a8_relocs, |
| 4012 | unsigned int num_a8_relocs, |
| 4013 | unsigned prev_num_a8_fixes, |
| 4014 | bfd_boolean *stub_changed_p) |
| 4015 | { |
| 4016 | asection *section; |
| 4017 | struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info); |
| 4018 | struct a8_erratum_fix *a8_fixes = *a8_fixes_p; |
| 4019 | unsigned int num_a8_fixes = *num_a8_fixes_p; |
| 4020 | unsigned int a8_fix_table_size = *a8_fix_table_size_p; |
| 4021 | |
| 4022 | if (htab == NULL) |
| 4023 | return FALSE; |
| 4024 | |
| 4025 | for (section = input_bfd->sections; |
| 4026 | section != NULL; |
| 4027 | section = section->next) |
| 4028 | { |
| 4029 | bfd_byte *contents = NULL; |
| 4030 | struct _arm_elf_section_data *sec_data; |
| 4031 | unsigned int span; |
| 4032 | bfd_vma base_vma; |
| 4033 | |
| 4034 | if (elf_section_type (section) != SHT_PROGBITS |
| 4035 | || (elf_section_flags (section) & SHF_EXECINSTR) == 0 |
| 4036 | || (section->flags & SEC_EXCLUDE) != 0 |
| 4037 | || (section->sec_info_type == ELF_INFO_TYPE_JUST_SYMS) |
| 4038 | || (section->output_section == bfd_abs_section_ptr)) |
| 4039 | continue; |
| 4040 | |
| 4041 | base_vma = section->output_section->vma + section->output_offset; |
| 4042 | |
| 4043 | if (elf_section_data (section)->this_hdr.contents != NULL) |
| 4044 | contents = elf_section_data (section)->this_hdr.contents; |
| 4045 | else if (! bfd_malloc_and_get_section (input_bfd, section, &contents)) |
| 4046 | return TRUE; |
| 4047 | |
| 4048 | sec_data = elf32_arm_section_data (section); |
| 4049 | |
| 4050 | for (span = 0; span < sec_data->mapcount; span++) |
| 4051 | { |
| 4052 | unsigned int span_start = sec_data->map[span].vma; |
| 4053 | unsigned int span_end = (span == sec_data->mapcount - 1) |
| 4054 | ? section->size : sec_data->map[span + 1].vma; |
| 4055 | unsigned int i; |
| 4056 | char span_type = sec_data->map[span].type; |
| 4057 | bfd_boolean last_was_32bit = FALSE, last_was_branch = FALSE; |
| 4058 | |
| 4059 | if (span_type != 't') |
| 4060 | continue; |
| 4061 | |
| 4062 | /* Span is entirely within a single 4KB region: skip scanning. */ |
| 4063 | if (((base_vma + span_start) & ~0xfff) |
| 4064 | == ((base_vma + span_end) & ~0xfff)) |
| 4065 | continue; |
| 4066 | |
| 4067 | /* Scan for 32-bit Thumb-2 branches which span two 4K regions, where: |
| 4068 | |
| 4069 | * The opcode is BLX.W, BL.W, B.W, Bcc.W |
| 4070 | * The branch target is in the same 4KB region as the |
| 4071 | first half of the branch. |
| 4072 | * The instruction before the branch is a 32-bit |
| 4073 | length non-branch instruction. */ |
| 4074 | for (i = span_start; i < span_end;) |
| 4075 | { |
| 4076 | unsigned int insn = bfd_getl16 (&contents[i]); |
| 4077 | bfd_boolean insn_32bit = FALSE, is_blx = FALSE, is_b = FALSE; |
| 4078 | bfd_boolean is_bl = FALSE, is_bcc = FALSE, is_32bit_branch; |
| 4079 | |
| 4080 | if ((insn & 0xe000) == 0xe000 && (insn & 0x1800) != 0x0000) |
| 4081 | insn_32bit = TRUE; |
| 4082 | |
| 4083 | if (insn_32bit) |
| 4084 | { |
| 4085 | /* Load the rest of the insn (in manual-friendly order). */ |
| 4086 | insn = (insn << 16) | bfd_getl16 (&contents[i + 2]); |
| 4087 | |
| 4088 | /* Encoding T4: B<c>.W. */ |
| 4089 | is_b = (insn & 0xf800d000) == 0xf0009000; |
| 4090 | /* Encoding T1: BL<c>.W. */ |
| 4091 | is_bl = (insn & 0xf800d000) == 0xf000d000; |
| 4092 | /* Encoding T2: BLX<c>.W. */ |
| 4093 | is_blx = (insn & 0xf800d000) == 0xf000c000; |
| 4094 | /* Encoding T3: B<c>.W (not permitted in IT block). */ |
| 4095 | is_bcc = (insn & 0xf800d000) == 0xf0008000 |
| 4096 | && (insn & 0x07f00000) != 0x03800000; |
| 4097 | } |
| 4098 | |
| 4099 | is_32bit_branch = is_b || is_bl || is_blx || is_bcc; |
| 4100 | |
| 4101 | if (((base_vma + i) & 0xfff) == 0xffe |
| 4102 | && insn_32bit |
| 4103 | && is_32bit_branch |
| 4104 | && last_was_32bit |
| 4105 | && ! last_was_branch) |
| 4106 | { |
| 4107 | bfd_signed_vma offset = 0; |
| 4108 | bfd_boolean force_target_arm = FALSE; |
| 4109 | bfd_boolean force_target_thumb = FALSE; |
| 4110 | bfd_vma target; |
| 4111 | enum elf32_arm_stub_type stub_type = arm_stub_none; |
| 4112 | struct a8_erratum_reloc key, *found; |
| 4113 | |
| 4114 | key.from = base_vma + i; |
| 4115 | found = (struct a8_erratum_reloc *) |
| 4116 | bsearch (&key, a8_relocs, num_a8_relocs, |
| 4117 | sizeof (struct a8_erratum_reloc), |
| 4118 | &a8_reloc_compare); |
| 4119 | |
| 4120 | if (found) |
| 4121 | { |
| 4122 | char *error_message = NULL; |
| 4123 | struct elf_link_hash_entry *entry; |
| 4124 | bfd_boolean use_plt = FALSE; |
| 4125 | |
| 4126 | /* We don't care about the error returned from this |
| 4127 | function, only if there is glue or not. */ |
| 4128 | entry = find_thumb_glue (info, found->sym_name, |
| 4129 | &error_message); |
| 4130 | |
| 4131 | if (entry) |
| 4132 | found->non_a8_stub = TRUE; |
| 4133 | |
| 4134 | /* Keep a simpler condition, for the sake of clarity. */ |
| 4135 | if (htab->splt != NULL && found->hash != NULL |
| 4136 | && found->hash->root.plt.offset != (bfd_vma) -1) |
| 4137 | use_plt = TRUE; |
| 4138 | |
| 4139 | if (found->r_type == R_ARM_THM_CALL) |
| 4140 | { |
| 4141 | if (found->st_type != STT_ARM_TFUNC || use_plt) |
| 4142 | force_target_arm = TRUE; |
| 4143 | else |
| 4144 | force_target_thumb = TRUE; |
| 4145 | } |
| 4146 | } |
| 4147 | |
| 4148 | /* Check if we have an offending branch instruction. */ |
| 4149 | |
| 4150 | if (found && found->non_a8_stub) |
| 4151 | /* We've already made a stub for this instruction, e.g. |
| 4152 | it's a long branch or a Thumb->ARM stub. Assume that |
| 4153 | stub will suffice to work around the A8 erratum (see |
| 4154 | setting of always_after_branch above). */ |
| 4155 | ; |
| 4156 | else if (is_bcc) |
| 4157 | { |
| 4158 | offset = (insn & 0x7ff) << 1; |
| 4159 | offset |= (insn & 0x3f0000) >> 4; |
| 4160 | offset |= (insn & 0x2000) ? 0x40000 : 0; |
| 4161 | offset |= (insn & 0x800) ? 0x80000 : 0; |
| 4162 | offset |= (insn & 0x4000000) ? 0x100000 : 0; |
| 4163 | if (offset & 0x100000) |
| 4164 | offset |= ~ ((bfd_signed_vma) 0xfffff); |
| 4165 | stub_type = arm_stub_a8_veneer_b_cond; |
| 4166 | } |
| 4167 | else if (is_b || is_bl || is_blx) |
| 4168 | { |
| 4169 | int s = (insn & 0x4000000) != 0; |
| 4170 | int j1 = (insn & 0x2000) != 0; |
| 4171 | int j2 = (insn & 0x800) != 0; |
| 4172 | int i1 = !(j1 ^ s); |
| 4173 | int i2 = !(j2 ^ s); |
| 4174 | |
| 4175 | offset = (insn & 0x7ff) << 1; |
| 4176 | offset |= (insn & 0x3ff0000) >> 4; |
| 4177 | offset |= i2 << 22; |
| 4178 | offset |= i1 << 23; |
| 4179 | offset |= s << 24; |
| 4180 | if (offset & 0x1000000) |
| 4181 | offset |= ~ ((bfd_signed_vma) 0xffffff); |
| 4182 | |
| 4183 | if (is_blx) |
| 4184 | offset &= ~ ((bfd_signed_vma) 3); |
| 4185 | |
| 4186 | stub_type = is_blx ? arm_stub_a8_veneer_blx : |
| 4187 | is_bl ? arm_stub_a8_veneer_bl : arm_stub_a8_veneer_b; |
| 4188 | } |
| 4189 | |
| 4190 | if (stub_type != arm_stub_none) |
| 4191 | { |
| 4192 | bfd_vma pc_for_insn = base_vma + i + 4; |
| 4193 | |
| 4194 | /* The original instruction is a BL, but the target is |
| 4195 | an ARM instruction. If we were not making a stub, |
| 4196 | the BL would have been converted to a BLX. Use the |
| 4197 | BLX stub instead in that case. */ |
| 4198 | if (htab->use_blx && force_target_arm |
| 4199 | && stub_type == arm_stub_a8_veneer_bl) |
| 4200 | { |
| 4201 | stub_type = arm_stub_a8_veneer_blx; |
| 4202 | is_blx = TRUE; |
| 4203 | is_bl = FALSE; |
| 4204 | } |
| 4205 | /* Conversely, if the original instruction was |
| 4206 | BLX but the target is Thumb mode, use the BL |
| 4207 | stub. */ |
| 4208 | else if (force_target_thumb |
| 4209 | && stub_type == arm_stub_a8_veneer_blx) |
| 4210 | { |
| 4211 | stub_type = arm_stub_a8_veneer_bl; |
| 4212 | is_blx = FALSE; |
| 4213 | is_bl = TRUE; |
| 4214 | } |
| 4215 | |
| 4216 | if (is_blx) |
| 4217 | pc_for_insn &= ~ ((bfd_vma) 3); |
| 4218 | |
| 4219 | /* If we found a relocation, use the proper destination, |
| 4220 | not the offset in the (unrelocated) instruction. |
| 4221 | Note this is always done if we switched the stub type |
| 4222 | above. */ |
| 4223 | if (found) |
| 4224 | offset = |
| 4225 | (bfd_signed_vma) (found->destination - pc_for_insn); |
| 4226 | |
| 4227 | target = pc_for_insn + offset; |
| 4228 | |
| 4229 | /* The BLX stub is ARM-mode code. Adjust the offset to |
| 4230 | take the different PC value (+8 instead of +4) into |
| 4231 | account. */ |
| 4232 | if (stub_type == arm_stub_a8_veneer_blx) |
| 4233 | offset += 4; |
| 4234 | |
| 4235 | if (((base_vma + i) & ~0xfff) == (target & ~0xfff)) |
| 4236 | { |
| 4237 | char *stub_name = NULL; |
| 4238 | |
| 4239 | if (num_a8_fixes == a8_fix_table_size) |
| 4240 | { |
| 4241 | a8_fix_table_size *= 2; |
| 4242 | a8_fixes = (struct a8_erratum_fix *) |
| 4243 | bfd_realloc (a8_fixes, |
| 4244 | sizeof (struct a8_erratum_fix) |
| 4245 | * a8_fix_table_size); |
| 4246 | } |
| 4247 | |
| 4248 | if (num_a8_fixes < prev_num_a8_fixes) |
| 4249 | { |
| 4250 | /* If we're doing a subsequent scan, |
| 4251 | check if we've found the same fix as |
| 4252 | before, and try and reuse the stub |
| 4253 | name. */ |
| 4254 | stub_name = a8_fixes[num_a8_fixes].stub_name; |
| 4255 | if ((a8_fixes[num_a8_fixes].section != section) |
| 4256 | || (a8_fixes[num_a8_fixes].offset != i)) |
| 4257 | { |
| 4258 | free (stub_name); |
| 4259 | stub_name = NULL; |
| 4260 | *stub_changed_p = TRUE; |
| 4261 | } |
| 4262 | } |
| 4263 | |
| 4264 | if (!stub_name) |
| 4265 | { |
| 4266 | stub_name = (char *) bfd_malloc (8 + 1 + 8 + 1); |
| 4267 | if (stub_name != NULL) |
| 4268 | sprintf (stub_name, "%x:%x", section->id, i); |
| 4269 | } |
| 4270 | |
| 4271 | a8_fixes[num_a8_fixes].input_bfd = input_bfd; |
| 4272 | a8_fixes[num_a8_fixes].section = section; |
| 4273 | a8_fixes[num_a8_fixes].offset = i; |
| 4274 | a8_fixes[num_a8_fixes].addend = offset; |
| 4275 | a8_fixes[num_a8_fixes].orig_insn = insn; |
| 4276 | a8_fixes[num_a8_fixes].stub_name = stub_name; |
| 4277 | a8_fixes[num_a8_fixes].stub_type = stub_type; |
| 4278 | a8_fixes[num_a8_fixes].st_type = |
| 4279 | is_blx ? STT_FUNC : STT_ARM_TFUNC; |
| 4280 | |
| 4281 | num_a8_fixes++; |
| 4282 | } |
| 4283 | } |
| 4284 | } |
| 4285 | |
| 4286 | i += insn_32bit ? 4 : 2; |
| 4287 | last_was_32bit = insn_32bit; |
| 4288 | last_was_branch = is_32bit_branch; |
| 4289 | } |
| 4290 | } |
| 4291 | |
| 4292 | if (elf_section_data (section)->this_hdr.contents == NULL) |
| 4293 | free (contents); |
| 4294 | } |
| 4295 | |
| 4296 | *a8_fixes_p = a8_fixes; |
| 4297 | *num_a8_fixes_p = num_a8_fixes; |
| 4298 | *a8_fix_table_size_p = a8_fix_table_size; |
| 4299 | |
| 4300 | return FALSE; |
| 4301 | } |
| 4302 | |
| 4303 | /* Determine and set the size of the stub section for a final link. |
| 4304 | |
| 4305 | The basic idea here is to examine all the relocations looking for |
| 4306 | PC-relative calls to a target that is unreachable with a "bl" |
| 4307 | instruction. */ |
| 4308 | |
| 4309 | bfd_boolean |
| 4310 | elf32_arm_size_stubs (bfd *output_bfd, |
| 4311 | bfd *stub_bfd, |
| 4312 | struct bfd_link_info *info, |
| 4313 | bfd_signed_vma group_size, |
| 4314 | asection * (*add_stub_section) (const char *, asection *), |
| 4315 | void (*layout_sections_again) (void)) |
| 4316 | { |
| 4317 | bfd_size_type stub_group_size; |
| 4318 | bfd_boolean stubs_always_after_branch; |
| 4319 | struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info); |
| 4320 | struct a8_erratum_fix *a8_fixes = NULL; |
| 4321 | unsigned int num_a8_fixes = 0, a8_fix_table_size = 10; |
| 4322 | struct a8_erratum_reloc *a8_relocs = NULL; |
| 4323 | unsigned int num_a8_relocs = 0, a8_reloc_table_size = 10, i; |
| 4324 | |
| 4325 | if (htab == NULL) |
| 4326 | return FALSE; |
| 4327 | |
| 4328 | if (htab->fix_cortex_a8) |
| 4329 | { |
| 4330 | a8_fixes = (struct a8_erratum_fix *) |
| 4331 | bfd_zmalloc (sizeof (struct a8_erratum_fix) * a8_fix_table_size); |
| 4332 | a8_relocs = (struct a8_erratum_reloc *) |
| 4333 | bfd_zmalloc (sizeof (struct a8_erratum_reloc) * a8_reloc_table_size); |
| 4334 | } |
| 4335 | |
| 4336 | /* Propagate mach to stub bfd, because it may not have been |
| 4337 | finalized when we created stub_bfd. */ |
| 4338 | bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd), |
| 4339 | bfd_get_mach (output_bfd)); |
| 4340 | |
| 4341 | /* Stash our params away. */ |
| 4342 | htab->stub_bfd = stub_bfd; |
| 4343 | htab->add_stub_section = add_stub_section; |
| 4344 | htab->layout_sections_again = layout_sections_again; |
| 4345 | stubs_always_after_branch = group_size < 0; |
| 4346 | |
| 4347 | /* The Cortex-A8 erratum fix depends on stubs not being in the same 4K page |
| 4348 | as the first half of a 32-bit branch straddling two 4K pages. This is a |
| 4349 | crude way of enforcing that. */ |
| 4350 | if (htab->fix_cortex_a8) |
| 4351 | stubs_always_after_branch = 1; |
| 4352 | |
| 4353 | if (group_size < 0) |
| 4354 | stub_group_size = -group_size; |
| 4355 | else |
| 4356 | stub_group_size = group_size; |
| 4357 | |
| 4358 | if (stub_group_size == 1) |
| 4359 | { |
| 4360 | /* Default values. */ |
| 4361 | /* Thumb branch range is +-4MB has to be used as the default |
| 4362 | maximum size (a given section can contain both ARM and Thumb |
| 4363 | code, so the worst case has to be taken into account). |
| 4364 | |
| 4365 | This value is 24K less than that, which allows for 2025 |
| 4366 | 12-byte stubs. If we exceed that, then we will fail to link. |
| 4367 | The user will have to relink with an explicit group size |
| 4368 | option. */ |
| 4369 | stub_group_size = 4170000; |
| 4370 | } |
| 4371 | |
| 4372 | group_sections (htab, stub_group_size, stubs_always_after_branch); |
| 4373 | |
| 4374 | /* If we're applying the cortex A8 fix, we need to determine the |
| 4375 | program header size now, because we cannot change it later -- |
| 4376 | that could alter section placements. Notice the A8 erratum fix |
| 4377 | ends up requiring the section addresses to remain unchanged |
| 4378 | modulo the page size. That's something we cannot represent |
| 4379 | inside BFD, and we don't want to force the section alignment to |
| 4380 | be the page size. */ |
| 4381 | if (htab->fix_cortex_a8) |
| 4382 | (*htab->layout_sections_again) (); |
| 4383 | |
| 4384 | while (1) |
| 4385 | { |
| 4386 | bfd *input_bfd; |
| 4387 | unsigned int bfd_indx; |
| 4388 | asection *stub_sec; |
| 4389 | bfd_boolean stub_changed = FALSE; |
| 4390 | unsigned prev_num_a8_fixes = num_a8_fixes; |
| 4391 | |
| 4392 | num_a8_fixes = 0; |
| 4393 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 4394 | input_bfd != NULL; |
| 4395 | input_bfd = input_bfd->link_next, bfd_indx++) |
| 4396 | { |
| 4397 | Elf_Internal_Shdr *symtab_hdr; |
| 4398 | asection *section; |
| 4399 | Elf_Internal_Sym *local_syms = NULL; |
| 4400 | |
| 4401 | num_a8_relocs = 0; |
| 4402 | |
| 4403 | /* We'll need the symbol table in a second. */ |
| 4404 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 4405 | if (symtab_hdr->sh_info == 0) |
| 4406 | continue; |
| 4407 | |
| 4408 | /* Walk over each section attached to the input bfd. */ |
| 4409 | for (section = input_bfd->sections; |
| 4410 | section != NULL; |
| 4411 | section = section->next) |
| 4412 | { |
| 4413 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 4414 | |
| 4415 | /* If there aren't any relocs, then there's nothing more |
| 4416 | to do. */ |
| 4417 | if ((section->flags & SEC_RELOC) == 0 |
| 4418 | || section->reloc_count == 0 |
| 4419 | || (section->flags & SEC_CODE) == 0) |
| 4420 | continue; |
| 4421 | |
| 4422 | /* If this section is a link-once section that will be |
| 4423 | discarded, then don't create any stubs. */ |
| 4424 | if (section->output_section == NULL |
| 4425 | || section->output_section->owner != output_bfd) |
| 4426 | continue; |
| 4427 | |
| 4428 | /* Get the relocs. */ |
| 4429 | internal_relocs |
| 4430 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, |
| 4431 | NULL, info->keep_memory); |
| 4432 | if (internal_relocs == NULL) |
| 4433 | goto error_ret_free_local; |
| 4434 | |
| 4435 | /* Now examine each relocation. */ |
| 4436 | irela = internal_relocs; |
| 4437 | irelaend = irela + section->reloc_count; |
| 4438 | for (; irela < irelaend; irela++) |
| 4439 | { |
| 4440 | unsigned int r_type, r_indx; |
| 4441 | enum elf32_arm_stub_type stub_type; |
| 4442 | struct elf32_arm_stub_hash_entry *stub_entry; |
| 4443 | asection *sym_sec; |
| 4444 | bfd_vma sym_value; |
| 4445 | bfd_vma destination; |
| 4446 | struct elf32_arm_link_hash_entry *hash; |
| 4447 | const char *sym_name; |
| 4448 | char *stub_name; |
| 4449 | const asection *id_sec; |
| 4450 | int st_type; |
| 4451 | bfd_boolean created_stub = FALSE; |
| 4452 | |
| 4453 | r_type = ELF32_R_TYPE (irela->r_info); |
| 4454 | r_indx = ELF32_R_SYM (irela->r_info); |
| 4455 | |
| 4456 | if (r_type >= (unsigned int) R_ARM_max) |
| 4457 | { |
| 4458 | bfd_set_error (bfd_error_bad_value); |
| 4459 | error_ret_free_internal: |
| 4460 | if (elf_section_data (section)->relocs == NULL) |
| 4461 | free (internal_relocs); |
| 4462 | goto error_ret_free_local; |
| 4463 | } |
| 4464 | |
| 4465 | /* Only look for stubs on branch instructions. */ |
| 4466 | if ((r_type != (unsigned int) R_ARM_CALL) |
| 4467 | && (r_type != (unsigned int) R_ARM_THM_CALL) |
| 4468 | && (r_type != (unsigned int) R_ARM_JUMP24) |
| 4469 | && (r_type != (unsigned int) R_ARM_THM_JUMP19) |
| 4470 | && (r_type != (unsigned int) R_ARM_THM_XPC22) |
| 4471 | && (r_type != (unsigned int) R_ARM_THM_JUMP24) |
| 4472 | && (r_type != (unsigned int) R_ARM_PLT32)) |
| 4473 | continue; |
| 4474 | |
| 4475 | /* Now determine the call target, its name, value, |
| 4476 | section. */ |
| 4477 | sym_sec = NULL; |
| 4478 | sym_value = 0; |
| 4479 | destination = 0; |
| 4480 | hash = NULL; |
| 4481 | sym_name = NULL; |
| 4482 | if (r_indx < symtab_hdr->sh_info) |
| 4483 | { |
| 4484 | /* It's a local symbol. */ |
| 4485 | Elf_Internal_Sym *sym; |
| 4486 | |
| 4487 | if (local_syms == NULL) |
| 4488 | { |
| 4489 | local_syms |
| 4490 | = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 4491 | if (local_syms == NULL) |
| 4492 | local_syms |
| 4493 | = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 4494 | symtab_hdr->sh_info, 0, |
| 4495 | NULL, NULL, NULL); |
| 4496 | if (local_syms == NULL) |
| 4497 | goto error_ret_free_internal; |
| 4498 | } |
| 4499 | |
| 4500 | sym = local_syms + r_indx; |
| 4501 | if (sym->st_shndx == SHN_UNDEF) |
| 4502 | sym_sec = bfd_und_section_ptr; |
| 4503 | else if (sym->st_shndx == SHN_ABS) |
| 4504 | sym_sec = bfd_abs_section_ptr; |
| 4505 | else if (sym->st_shndx == SHN_COMMON) |
| 4506 | sym_sec = bfd_com_section_ptr; |
| 4507 | else |
| 4508 | sym_sec = |
| 4509 | bfd_section_from_elf_index (input_bfd, sym->st_shndx); |
| 4510 | |
| 4511 | if (!sym_sec) |
| 4512 | /* This is an undefined symbol. It can never |
| 4513 | be resolved. */ |
| 4514 | continue; |
| 4515 | |
| 4516 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 4517 | sym_value = sym->st_value; |
| 4518 | destination = (sym_value + irela->r_addend |
| 4519 | + sym_sec->output_offset |
| 4520 | + sym_sec->output_section->vma); |
| 4521 | st_type = ELF_ST_TYPE (sym->st_info); |
| 4522 | sym_name |
| 4523 | = bfd_elf_string_from_elf_section (input_bfd, |
| 4524 | symtab_hdr->sh_link, |
| 4525 | sym->st_name); |
| 4526 | } |
| 4527 | else |
| 4528 | { |
| 4529 | /* It's an external symbol. */ |
| 4530 | int e_indx; |
| 4531 | |
| 4532 | e_indx = r_indx - symtab_hdr->sh_info; |
| 4533 | hash = ((struct elf32_arm_link_hash_entry *) |
| 4534 | elf_sym_hashes (input_bfd)[e_indx]); |
| 4535 | |
| 4536 | while (hash->root.root.type == bfd_link_hash_indirect |
| 4537 | || hash->root.root.type == bfd_link_hash_warning) |
| 4538 | hash = ((struct elf32_arm_link_hash_entry *) |
| 4539 | hash->root.root.u.i.link); |
| 4540 | |
| 4541 | if (hash->root.root.type == bfd_link_hash_defined |
| 4542 | || hash->root.root.type == bfd_link_hash_defweak) |
| 4543 | { |
| 4544 | sym_sec = hash->root.root.u.def.section; |
| 4545 | sym_value = hash->root.root.u.def.value; |
| 4546 | |
| 4547 | struct elf32_arm_link_hash_table *globals = |
| 4548 | elf32_arm_hash_table (info); |
| 4549 | |
| 4550 | /* For a destination in a shared library, |
| 4551 | use the PLT stub as target address to |
| 4552 | decide whether a branch stub is |
| 4553 | needed. */ |
| 4554 | if (globals != NULL |
| 4555 | && globals->splt != NULL |
| 4556 | && hash != NULL |
| 4557 | && hash->root.plt.offset != (bfd_vma) -1) |
| 4558 | { |
| 4559 | sym_sec = globals->splt; |
| 4560 | sym_value = hash->root.plt.offset; |
| 4561 | if (sym_sec->output_section != NULL) |
| 4562 | destination = (sym_value |
| 4563 | + sym_sec->output_offset |
| 4564 | + sym_sec->output_section->vma); |
| 4565 | } |
| 4566 | else if (sym_sec->output_section != NULL) |
| 4567 | destination = (sym_value + irela->r_addend |
| 4568 | + sym_sec->output_offset |
| 4569 | + sym_sec->output_section->vma); |
| 4570 | } |
| 4571 | else if ((hash->root.root.type == bfd_link_hash_undefined) |
| 4572 | || (hash->root.root.type == bfd_link_hash_undefweak)) |
| 4573 | { |
| 4574 | /* For a shared library, use the PLT stub as |
| 4575 | target address to decide whether a long |
| 4576 | branch stub is needed. |
| 4577 | For absolute code, they cannot be handled. */ |
| 4578 | struct elf32_arm_link_hash_table *globals = |
| 4579 | elf32_arm_hash_table (info); |
| 4580 | |
| 4581 | if (globals != NULL |
| 4582 | && globals->splt != NULL |
| 4583 | && hash != NULL |
| 4584 | && hash->root.plt.offset != (bfd_vma) -1) |
| 4585 | { |
| 4586 | sym_sec = globals->splt; |
| 4587 | sym_value = hash->root.plt.offset; |
| 4588 | if (sym_sec->output_section != NULL) |
| 4589 | destination = (sym_value |
| 4590 | + sym_sec->output_offset |
| 4591 | + sym_sec->output_section->vma); |
| 4592 | } |
| 4593 | else |
| 4594 | continue; |
| 4595 | } |
| 4596 | else |
| 4597 | { |
| 4598 | bfd_set_error (bfd_error_bad_value); |
| 4599 | goto error_ret_free_internal; |
| 4600 | } |
| 4601 | st_type = ELF_ST_TYPE (hash->root.type); |
| 4602 | sym_name = hash->root.root.root.string; |
| 4603 | } |
| 4604 | |
| 4605 | do |
| 4606 | { |
| 4607 | /* Determine what (if any) linker stub is needed. */ |
| 4608 | stub_type = arm_type_of_stub (info, section, irela, |
| 4609 | &st_type, hash, |
| 4610 | destination, sym_sec, |
| 4611 | input_bfd, sym_name); |
| 4612 | if (stub_type == arm_stub_none) |
| 4613 | break; |
| 4614 | |
| 4615 | /* Support for grouping stub sections. */ |
| 4616 | id_sec = htab->stub_group[section->id].link_sec; |
| 4617 | |
| 4618 | /* Get the name of this stub. */ |
| 4619 | stub_name = elf32_arm_stub_name (id_sec, sym_sec, hash, |
| 4620 | irela, stub_type); |
| 4621 | if (!stub_name) |
| 4622 | goto error_ret_free_internal; |
| 4623 | |
| 4624 | /* We've either created a stub for this reloc already, |
| 4625 | or we are about to. */ |
| 4626 | created_stub = TRUE; |
| 4627 | |
| 4628 | stub_entry = arm_stub_hash_lookup |
| 4629 | (&htab->stub_hash_table, stub_name, |
| 4630 | FALSE, FALSE); |
| 4631 | if (stub_entry != NULL) |
| 4632 | { |
| 4633 | /* The proper stub has already been created. */ |
| 4634 | free (stub_name); |
| 4635 | stub_entry->target_value = sym_value; |
| 4636 | break; |
| 4637 | } |
| 4638 | |
| 4639 | stub_entry = elf32_arm_add_stub (stub_name, section, |
| 4640 | htab); |
| 4641 | if (stub_entry == NULL) |
| 4642 | { |
| 4643 | free (stub_name); |
| 4644 | goto error_ret_free_internal; |
| 4645 | } |
| 4646 | |
| 4647 | stub_entry->target_value = sym_value; |
| 4648 | stub_entry->target_section = sym_sec; |
| 4649 | stub_entry->stub_type = stub_type; |
| 4650 | stub_entry->h = hash; |
| 4651 | stub_entry->st_type = st_type; |
| 4652 | |
| 4653 | if (sym_name == NULL) |
| 4654 | sym_name = "unnamed"; |
| 4655 | stub_entry->output_name = (char *) |
| 4656 | bfd_alloc (htab->stub_bfd, |
| 4657 | sizeof (THUMB2ARM_GLUE_ENTRY_NAME) |
| 4658 | + strlen (sym_name)); |
| 4659 | if (stub_entry->output_name == NULL) |
| 4660 | { |
| 4661 | free (stub_name); |
| 4662 | goto error_ret_free_internal; |
| 4663 | } |
| 4664 | |
| 4665 | /* For historical reasons, use the existing names for |
| 4666 | ARM-to-Thumb and Thumb-to-ARM stubs. */ |
| 4667 | if ( ((r_type == (unsigned int) R_ARM_THM_CALL) |
| 4668 | || (r_type == (unsigned int) R_ARM_THM_JUMP24)) |
| 4669 | && st_type != STT_ARM_TFUNC) |
| 4670 | sprintf (stub_entry->output_name, |
| 4671 | THUMB2ARM_GLUE_ENTRY_NAME, sym_name); |
| 4672 | else if ( ((r_type == (unsigned int) R_ARM_CALL) |
| 4673 | || (r_type == (unsigned int) R_ARM_JUMP24)) |
| 4674 | && st_type == STT_ARM_TFUNC) |
| 4675 | sprintf (stub_entry->output_name, |
| 4676 | ARM2THUMB_GLUE_ENTRY_NAME, sym_name); |
| 4677 | else |
| 4678 | sprintf (stub_entry->output_name, STUB_ENTRY_NAME, |
| 4679 | sym_name); |
| 4680 | |
| 4681 | stub_changed = TRUE; |
| 4682 | } |
| 4683 | while (0); |
| 4684 | |
| 4685 | /* Look for relocations which might trigger Cortex-A8 |
| 4686 | erratum. */ |
| 4687 | if (htab->fix_cortex_a8 |
| 4688 | && (r_type == (unsigned int) R_ARM_THM_JUMP24 |
| 4689 | || r_type == (unsigned int) R_ARM_THM_JUMP19 |
| 4690 | || r_type == (unsigned int) R_ARM_THM_CALL |
| 4691 | || r_type == (unsigned int) R_ARM_THM_XPC22)) |
| 4692 | { |
| 4693 | bfd_vma from = section->output_section->vma |
| 4694 | + section->output_offset |
| 4695 | + irela->r_offset; |
| 4696 | |
| 4697 | if ((from & 0xfff) == 0xffe) |
| 4698 | { |
| 4699 | /* Found a candidate. Note we haven't checked the |
| 4700 | destination is within 4K here: if we do so (and |
| 4701 | don't create an entry in a8_relocs) we can't tell |
| 4702 | that a branch should have been relocated when |
| 4703 | scanning later. */ |
| 4704 | if (num_a8_relocs == a8_reloc_table_size) |
| 4705 | { |
| 4706 | a8_reloc_table_size *= 2; |
| 4707 | a8_relocs = (struct a8_erratum_reloc *) |
| 4708 | bfd_realloc (a8_relocs, |
| 4709 | sizeof (struct a8_erratum_reloc) |
| 4710 | * a8_reloc_table_size); |
| 4711 | } |
| 4712 | |
| 4713 | a8_relocs[num_a8_relocs].from = from; |
| 4714 | a8_relocs[num_a8_relocs].destination = destination; |
| 4715 | a8_relocs[num_a8_relocs].r_type = r_type; |
| 4716 | a8_relocs[num_a8_relocs].st_type = st_type; |
| 4717 | a8_relocs[num_a8_relocs].sym_name = sym_name; |
| 4718 | a8_relocs[num_a8_relocs].non_a8_stub = created_stub; |
| 4719 | a8_relocs[num_a8_relocs].hash = hash; |
| 4720 | |
| 4721 | num_a8_relocs++; |
| 4722 | } |
| 4723 | } |
| 4724 | } |
| 4725 | |
| 4726 | /* We're done with the internal relocs, free them. */ |
| 4727 | if (elf_section_data (section)->relocs == NULL) |
| 4728 | free (internal_relocs); |
| 4729 | } |
| 4730 | |
| 4731 | if (htab->fix_cortex_a8) |
| 4732 | { |
| 4733 | /* Sort relocs which might apply to Cortex-A8 erratum. */ |
| 4734 | qsort (a8_relocs, num_a8_relocs, |
| 4735 | sizeof (struct a8_erratum_reloc), |
| 4736 | &a8_reloc_compare); |
| 4737 | |
| 4738 | /* Scan for branches which might trigger Cortex-A8 erratum. */ |
| 4739 | if (cortex_a8_erratum_scan (input_bfd, info, &a8_fixes, |
| 4740 | &num_a8_fixes, &a8_fix_table_size, |
| 4741 | a8_relocs, num_a8_relocs, |
| 4742 | prev_num_a8_fixes, &stub_changed) |
| 4743 | != 0) |
| 4744 | goto error_ret_free_local; |
| 4745 | } |
| 4746 | } |
| 4747 | |
| 4748 | if (prev_num_a8_fixes != num_a8_fixes) |
| 4749 | stub_changed = TRUE; |
| 4750 | |
| 4751 | if (!stub_changed) |
| 4752 | break; |
| 4753 | |
| 4754 | /* OK, we've added some stubs. Find out the new size of the |
| 4755 | stub sections. */ |
| 4756 | for (stub_sec = htab->stub_bfd->sections; |
| 4757 | stub_sec != NULL; |
| 4758 | stub_sec = stub_sec->next) |
| 4759 | { |
| 4760 | /* Ignore non-stub sections. */ |
| 4761 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 4762 | continue; |
| 4763 | |
| 4764 | stub_sec->size = 0; |
| 4765 | } |
| 4766 | |
| 4767 | bfd_hash_traverse (&htab->stub_hash_table, arm_size_one_stub, htab); |
| 4768 | |
| 4769 | /* Add Cortex-A8 erratum veneers to stub section sizes too. */ |
| 4770 | if (htab->fix_cortex_a8) |
| 4771 | for (i = 0; i < num_a8_fixes; i++) |
| 4772 | { |
| 4773 | stub_sec = elf32_arm_create_or_find_stub_sec (NULL, |
| 4774 | a8_fixes[i].section, htab); |
| 4775 | |
| 4776 | if (stub_sec == NULL) |
| 4777 | goto error_ret_free_local; |
| 4778 | |
| 4779 | stub_sec->size |
| 4780 | += find_stub_size_and_template (a8_fixes[i].stub_type, NULL, |
| 4781 | NULL); |
| 4782 | } |
| 4783 | |
| 4784 | |
| 4785 | /* Ask the linker to do its stuff. */ |
| 4786 | (*htab->layout_sections_again) (); |
| 4787 | } |
| 4788 | |
| 4789 | /* Add stubs for Cortex-A8 erratum fixes now. */ |
| 4790 | if (htab->fix_cortex_a8) |
| 4791 | { |
| 4792 | for (i = 0; i < num_a8_fixes; i++) |
| 4793 | { |
| 4794 | struct elf32_arm_stub_hash_entry *stub_entry; |
| 4795 | char *stub_name = a8_fixes[i].stub_name; |
| 4796 | asection *section = a8_fixes[i].section; |
| 4797 | unsigned int section_id = a8_fixes[i].section->id; |
| 4798 | asection *link_sec = htab->stub_group[section_id].link_sec; |
| 4799 | asection *stub_sec = htab->stub_group[section_id].stub_sec; |
| 4800 | const insn_sequence *template_sequence; |
| 4801 | int template_size, size = 0; |
| 4802 | |
| 4803 | stub_entry = arm_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| 4804 | TRUE, FALSE); |
| 4805 | if (stub_entry == NULL) |
| 4806 | { |
| 4807 | (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), |
| 4808 | section->owner, |
| 4809 | stub_name); |
| 4810 | return FALSE; |
| 4811 | } |
| 4812 | |
| 4813 | stub_entry->stub_sec = stub_sec; |
| 4814 | stub_entry->stub_offset = 0; |
| 4815 | stub_entry->id_sec = link_sec; |
| 4816 | stub_entry->stub_type = a8_fixes[i].stub_type; |
| 4817 | stub_entry->target_section = a8_fixes[i].section; |
| 4818 | stub_entry->target_value = a8_fixes[i].offset; |
| 4819 | stub_entry->target_addend = a8_fixes[i].addend; |
| 4820 | stub_entry->orig_insn = a8_fixes[i].orig_insn; |
| 4821 | stub_entry->st_type = a8_fixes[i].st_type; |
| 4822 | |
| 4823 | size = find_stub_size_and_template (a8_fixes[i].stub_type, |
| 4824 | &template_sequence, |
| 4825 | &template_size); |
| 4826 | |
| 4827 | stub_entry->stub_size = size; |
| 4828 | stub_entry->stub_template = template_sequence; |
| 4829 | stub_entry->stub_template_size = template_size; |
| 4830 | } |
| 4831 | |
| 4832 | /* Stash the Cortex-A8 erratum fix array for use later in |
| 4833 | elf32_arm_write_section(). */ |
| 4834 | htab->a8_erratum_fixes = a8_fixes; |
| 4835 | htab->num_a8_erratum_fixes = num_a8_fixes; |
| 4836 | } |
| 4837 | else |
| 4838 | { |
| 4839 | htab->a8_erratum_fixes = NULL; |
| 4840 | htab->num_a8_erratum_fixes = 0; |
| 4841 | } |
| 4842 | return TRUE; |
| 4843 | |
| 4844 | error_ret_free_local: |
| 4845 | return FALSE; |
| 4846 | } |
| 4847 | |
| 4848 | /* Build all the stubs associated with the current output file. The |
| 4849 | stubs are kept in a hash table attached to the main linker hash |
| 4850 | table. We also set up the .plt entries for statically linked PIC |
| 4851 | functions here. This function is called via arm_elf_finish in the |
| 4852 | linker. */ |
| 4853 | |
| 4854 | bfd_boolean |
| 4855 | elf32_arm_build_stubs (struct bfd_link_info *info) |
| 4856 | { |
| 4857 | asection *stub_sec; |
| 4858 | struct bfd_hash_table *table; |
| 4859 | struct elf32_arm_link_hash_table *htab; |
| 4860 | |
| 4861 | htab = elf32_arm_hash_table (info); |
| 4862 | if (htab == NULL) |
| 4863 | return FALSE; |
| 4864 | |
| 4865 | for (stub_sec = htab->stub_bfd->sections; |
| 4866 | stub_sec != NULL; |
| 4867 | stub_sec = stub_sec->next) |
| 4868 | { |
| 4869 | bfd_size_type size; |
| 4870 | |
| 4871 | /* Ignore non-stub sections. */ |
| 4872 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 4873 | continue; |
| 4874 | |
| 4875 | /* Allocate memory to hold the linker stubs. */ |
| 4876 | size = stub_sec->size; |
| 4877 | stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size); |
| 4878 | if (stub_sec->contents == NULL && size != 0) |
| 4879 | return FALSE; |
| 4880 | stub_sec->size = 0; |
| 4881 | } |
| 4882 | |
| 4883 | /* Build the stubs as directed by the stub hash table. */ |
| 4884 | table = &htab->stub_hash_table; |
| 4885 | bfd_hash_traverse (table, arm_build_one_stub, info); |
| 4886 | if (htab->fix_cortex_a8) |
| 4887 | { |
| 4888 | /* Place the cortex a8 stubs last. */ |
| 4889 | htab->fix_cortex_a8 = -1; |
| 4890 | bfd_hash_traverse (table, arm_build_one_stub, info); |
| 4891 | } |
| 4892 | |
| 4893 | return TRUE; |
| 4894 | } |
| 4895 | |
| 4896 | /* Locate the Thumb encoded calling stub for NAME. */ |
| 4897 | |
| 4898 | static struct elf_link_hash_entry * |
| 4899 | find_thumb_glue (struct bfd_link_info *link_info, |
| 4900 | const char *name, |
| 4901 | char **error_message) |
| 4902 | { |
| 4903 | char *tmp_name; |
| 4904 | struct elf_link_hash_entry *hash; |
| 4905 | struct elf32_arm_link_hash_table *hash_table; |
| 4906 | |
| 4907 | /* We need a pointer to the armelf specific hash table. */ |
| 4908 | hash_table = elf32_arm_hash_table (link_info); |
| 4909 | if (hash_table == NULL) |
| 4910 | return NULL; |
| 4911 | |
| 4912 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
| 4913 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); |
| 4914 | |
| 4915 | BFD_ASSERT (tmp_name); |
| 4916 | |
| 4917 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); |
| 4918 | |
| 4919 | hash = elf_link_hash_lookup |
| 4920 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
| 4921 | |
| 4922 | if (hash == NULL |
| 4923 | && asprintf (error_message, _("unable to find THUMB glue '%s' for '%s'"), |
| 4924 | tmp_name, name) == -1) |
| 4925 | *error_message = (char *) bfd_errmsg (bfd_error_system_call); |
| 4926 | |
| 4927 | free (tmp_name); |
| 4928 | |
| 4929 | return hash; |
| 4930 | } |
| 4931 | |
| 4932 | /* Locate the ARM encoded calling stub for NAME. */ |
| 4933 | |
| 4934 | static struct elf_link_hash_entry * |
| 4935 | find_arm_glue (struct bfd_link_info *link_info, |
| 4936 | const char *name, |
| 4937 | char **error_message) |
| 4938 | { |
| 4939 | char *tmp_name; |
| 4940 | struct elf_link_hash_entry *myh; |
| 4941 | struct elf32_arm_link_hash_table *hash_table; |
| 4942 | |
| 4943 | /* We need a pointer to the elfarm specific hash table. */ |
| 4944 | hash_table = elf32_arm_hash_table (link_info); |
| 4945 | if (hash_table == NULL) |
| 4946 | return NULL; |
| 4947 | |
| 4948 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
| 4949 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); |
| 4950 | |
| 4951 | BFD_ASSERT (tmp_name); |
| 4952 | |
| 4953 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); |
| 4954 | |
| 4955 | myh = elf_link_hash_lookup |
| 4956 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
| 4957 | |
| 4958 | if (myh == NULL |
| 4959 | && asprintf (error_message, _("unable to find ARM glue '%s' for '%s'"), |
| 4960 | tmp_name, name) == -1) |
| 4961 | *error_message = (char *) bfd_errmsg (bfd_error_system_call); |
| 4962 | |
| 4963 | free (tmp_name); |
| 4964 | |
| 4965 | return myh; |
| 4966 | } |
| 4967 | |
| 4968 | /* ARM->Thumb glue (static images): |
| 4969 | |
| 4970 | .arm |
| 4971 | __func_from_arm: |
| 4972 | ldr r12, __func_addr |
| 4973 | bx r12 |
| 4974 | __func_addr: |
| 4975 | .word func @ behave as if you saw a ARM_32 reloc. |
| 4976 | |
| 4977 | (v5t static images) |
| 4978 | .arm |
| 4979 | __func_from_arm: |
| 4980 | ldr pc, __func_addr |
| 4981 | __func_addr: |
| 4982 | .word func @ behave as if you saw a ARM_32 reloc. |
| 4983 | |
| 4984 | (relocatable images) |
| 4985 | .arm |
| 4986 | __func_from_arm: |
| 4987 | ldr r12, __func_offset |
| 4988 | add r12, r12, pc |
| 4989 | bx r12 |
| 4990 | __func_offset: |
| 4991 | .word func - . */ |
| 4992 | |
| 4993 | #define ARM2THUMB_STATIC_GLUE_SIZE 12 |
| 4994 | static const insn32 a2t1_ldr_insn = 0xe59fc000; |
| 4995 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; |
| 4996 | static const insn32 a2t3_func_addr_insn = 0x00000001; |
| 4997 | |
| 4998 | #define ARM2THUMB_V5_STATIC_GLUE_SIZE 8 |
| 4999 | static const insn32 a2t1v5_ldr_insn = 0xe51ff004; |
| 5000 | static const insn32 a2t2v5_func_addr_insn = 0x00000001; |
| 5001 | |
| 5002 | #define ARM2THUMB_PIC_GLUE_SIZE 16 |
| 5003 | static const insn32 a2t1p_ldr_insn = 0xe59fc004; |
| 5004 | static const insn32 a2t2p_add_pc_insn = 0xe08cc00f; |
| 5005 | static const insn32 a2t3p_bx_r12_insn = 0xe12fff1c; |
| 5006 | |
| 5007 | /* Thumb->ARM: Thumb->(non-interworking aware) ARM |
| 5008 | |
| 5009 | .thumb .thumb |
| 5010 | .align 2 .align 2 |
| 5011 | __func_from_thumb: __func_from_thumb: |
| 5012 | bx pc push {r6, lr} |
| 5013 | nop ldr r6, __func_addr |
| 5014 | .arm mov lr, pc |
| 5015 | b func bx r6 |
| 5016 | .arm |
| 5017 | ;; back_to_thumb |
| 5018 | ldmia r13! {r6, lr} |
| 5019 | bx lr |
| 5020 | __func_addr: |
| 5021 | .word func */ |
| 5022 | |
| 5023 | #define THUMB2ARM_GLUE_SIZE 8 |
| 5024 | static const insn16 t2a1_bx_pc_insn = 0x4778; |
| 5025 | static const insn16 t2a2_noop_insn = 0x46c0; |
| 5026 | static const insn32 t2a3_b_insn = 0xea000000; |
| 5027 | |
| 5028 | #define VFP11_ERRATUM_VENEER_SIZE 8 |
| 5029 | |
| 5030 | #define ARM_BX_VENEER_SIZE 12 |
| 5031 | static const insn32 armbx1_tst_insn = 0xe3100001; |
| 5032 | static const insn32 armbx2_moveq_insn = 0x01a0f000; |
| 5033 | static const insn32 armbx3_bx_insn = 0xe12fff10; |
| 5034 | |
| 5035 | #ifndef ELFARM_NABI_C_INCLUDED |
| 5036 | static void |
| 5037 | arm_allocate_glue_section_space (bfd * abfd, bfd_size_type size, const char * name) |
| 5038 | { |
| 5039 | asection * s; |
| 5040 | bfd_byte * contents; |
| 5041 | |
| 5042 | if (size == 0) |
| 5043 | { |
| 5044 | /* Do not include empty glue sections in the output. */ |
| 5045 | if (abfd != NULL) |
| 5046 | { |
| 5047 | s = bfd_get_section_by_name (abfd, name); |
| 5048 | if (s != NULL) |
| 5049 | s->flags |= SEC_EXCLUDE; |
| 5050 | } |
| 5051 | return; |
| 5052 | } |
| 5053 | |
| 5054 | BFD_ASSERT (abfd != NULL); |
| 5055 | |
| 5056 | s = bfd_get_section_by_name (abfd, name); |
| 5057 | BFD_ASSERT (s != NULL); |
| 5058 | |
| 5059 | contents = (bfd_byte *) bfd_alloc (abfd, size); |
| 5060 | |
| 5061 | BFD_ASSERT (s->size == size); |
| 5062 | s->contents = contents; |
| 5063 | } |
| 5064 | |
| 5065 | bfd_boolean |
| 5066 | bfd_elf32_arm_allocate_interworking_sections (struct bfd_link_info * info) |
| 5067 | { |
| 5068 | struct elf32_arm_link_hash_table * globals; |
| 5069 | |
| 5070 | globals = elf32_arm_hash_table (info); |
| 5071 | BFD_ASSERT (globals != NULL); |
| 5072 | |
| 5073 | arm_allocate_glue_section_space (globals->bfd_of_glue_owner, |
| 5074 | globals->arm_glue_size, |
| 5075 | ARM2THUMB_GLUE_SECTION_NAME); |
| 5076 | |
| 5077 | arm_allocate_glue_section_space (globals->bfd_of_glue_owner, |
| 5078 | globals->thumb_glue_size, |
| 5079 | THUMB2ARM_GLUE_SECTION_NAME); |
| 5080 | |
| 5081 | arm_allocate_glue_section_space (globals->bfd_of_glue_owner, |
| 5082 | globals->vfp11_erratum_glue_size, |
| 5083 | VFP11_ERRATUM_VENEER_SECTION_NAME); |
| 5084 | |
| 5085 | arm_allocate_glue_section_space (globals->bfd_of_glue_owner, |
| 5086 | globals->bx_glue_size, |
| 5087 | ARM_BX_GLUE_SECTION_NAME); |
| 5088 | |
| 5089 | return TRUE; |
| 5090 | } |
| 5091 | |
| 5092 | /* Allocate space and symbols for calling a Thumb function from Arm mode. |
| 5093 | returns the symbol identifying the stub. */ |
| 5094 | |
| 5095 | static struct elf_link_hash_entry * |
| 5096 | record_arm_to_thumb_glue (struct bfd_link_info * link_info, |
| 5097 | struct elf_link_hash_entry * h) |
| 5098 | { |
| 5099 | const char * name = h->root.root.string; |
| 5100 | asection * s; |
| 5101 | char * tmp_name; |
| 5102 | struct elf_link_hash_entry * myh; |
| 5103 | struct bfd_link_hash_entry * bh; |
| 5104 | struct elf32_arm_link_hash_table * globals; |
| 5105 | bfd_vma val; |
| 5106 | bfd_size_type size; |
| 5107 | |
| 5108 | globals = elf32_arm_hash_table (link_info); |
| 5109 | BFD_ASSERT (globals != NULL); |
| 5110 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 5111 | |
| 5112 | s = bfd_get_section_by_name |
| 5113 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); |
| 5114 | |
| 5115 | BFD_ASSERT (s != NULL); |
| 5116 | |
| 5117 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
| 5118 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); |
| 5119 | |
| 5120 | BFD_ASSERT (tmp_name); |
| 5121 | |
| 5122 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); |
| 5123 | |
| 5124 | myh = elf_link_hash_lookup |
| 5125 | (&(globals)->root, tmp_name, FALSE, FALSE, TRUE); |
| 5126 | |
| 5127 | if (myh != NULL) |
| 5128 | { |
| 5129 | /* We've already seen this guy. */ |
| 5130 | free (tmp_name); |
| 5131 | return myh; |
| 5132 | } |
| 5133 | |
| 5134 | /* The only trick here is using hash_table->arm_glue_size as the value. |
| 5135 | Even though the section isn't allocated yet, this is where we will be |
| 5136 | putting it. The +1 on the value marks that the stub has not been |
| 5137 | output yet - not that it is a Thumb function. */ |
| 5138 | bh = NULL; |
| 5139 | val = globals->arm_glue_size + 1; |
| 5140 | _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, |
| 5141 | tmp_name, BSF_GLOBAL, s, val, |
| 5142 | NULL, TRUE, FALSE, &bh); |
| 5143 | |
| 5144 | myh = (struct elf_link_hash_entry *) bh; |
| 5145 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 5146 | myh->forced_local = 1; |
| 5147 | |
| 5148 | free (tmp_name); |
| 5149 | |
| 5150 | if (link_info->shared || globals->root.is_relocatable_executable |
| 5151 | || globals->pic_veneer) |
| 5152 | size = ARM2THUMB_PIC_GLUE_SIZE; |
| 5153 | else if (globals->use_blx) |
| 5154 | size = ARM2THUMB_V5_STATIC_GLUE_SIZE; |
| 5155 | else |
| 5156 | size = ARM2THUMB_STATIC_GLUE_SIZE; |
| 5157 | |
| 5158 | s->size += size; |
| 5159 | globals->arm_glue_size += size; |
| 5160 | |
| 5161 | return myh; |
| 5162 | } |
| 5163 | |
| 5164 | /* Allocate space for ARMv4 BX veneers. */ |
| 5165 | |
| 5166 | static void |
| 5167 | record_arm_bx_glue (struct bfd_link_info * link_info, int reg) |
| 5168 | { |
| 5169 | asection * s; |
| 5170 | struct elf32_arm_link_hash_table *globals; |
| 5171 | char *tmp_name; |
| 5172 | struct elf_link_hash_entry *myh; |
| 5173 | struct bfd_link_hash_entry *bh; |
| 5174 | bfd_vma val; |
| 5175 | |
| 5176 | /* BX PC does not need a veneer. */ |
| 5177 | if (reg == 15) |
| 5178 | return; |
| 5179 | |
| 5180 | globals = elf32_arm_hash_table (link_info); |
| 5181 | BFD_ASSERT (globals != NULL); |
| 5182 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 5183 | |
| 5184 | /* Check if this veneer has already been allocated. */ |
| 5185 | if (globals->bx_glue_offset[reg]) |
| 5186 | return; |
| 5187 | |
| 5188 | s = bfd_get_section_by_name |
| 5189 | (globals->bfd_of_glue_owner, ARM_BX_GLUE_SECTION_NAME); |
| 5190 | |
| 5191 | BFD_ASSERT (s != NULL); |
| 5192 | |
| 5193 | /* Add symbol for veneer. */ |
| 5194 | tmp_name = (char *) |
| 5195 | bfd_malloc ((bfd_size_type) strlen (ARM_BX_GLUE_ENTRY_NAME) + 1); |
| 5196 | |
| 5197 | BFD_ASSERT (tmp_name); |
| 5198 | |
| 5199 | sprintf (tmp_name, ARM_BX_GLUE_ENTRY_NAME, reg); |
| 5200 | |
| 5201 | myh = elf_link_hash_lookup |
| 5202 | (&(globals)->root, tmp_name, FALSE, FALSE, FALSE); |
| 5203 | |
| 5204 | BFD_ASSERT (myh == NULL); |
| 5205 | |
| 5206 | bh = NULL; |
| 5207 | val = globals->bx_glue_size; |
| 5208 | _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, |
| 5209 | tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val, |
| 5210 | NULL, TRUE, FALSE, &bh); |
| 5211 | |
| 5212 | myh = (struct elf_link_hash_entry *) bh; |
| 5213 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 5214 | myh->forced_local = 1; |
| 5215 | |
| 5216 | s->size += ARM_BX_VENEER_SIZE; |
| 5217 | globals->bx_glue_offset[reg] = globals->bx_glue_size | 2; |
| 5218 | globals->bx_glue_size += ARM_BX_VENEER_SIZE; |
| 5219 | } |
| 5220 | |
| 5221 | |
| 5222 | /* Add an entry to the code/data map for section SEC. */ |
| 5223 | |
| 5224 | static void |
| 5225 | elf32_arm_section_map_add (asection *sec, char type, bfd_vma vma) |
| 5226 | { |
| 5227 | struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec); |
| 5228 | unsigned int newidx; |
| 5229 | |
| 5230 | if (sec_data->map == NULL) |
| 5231 | { |
| 5232 | sec_data->map = (elf32_arm_section_map *) |
| 5233 | bfd_malloc (sizeof (elf32_arm_section_map)); |
| 5234 | sec_data->mapcount = 0; |
| 5235 | sec_data->mapsize = 1; |
| 5236 | } |
| 5237 | |
| 5238 | newidx = sec_data->mapcount++; |
| 5239 | |
| 5240 | if (sec_data->mapcount > sec_data->mapsize) |
| 5241 | { |
| 5242 | sec_data->mapsize *= 2; |
| 5243 | sec_data->map = (elf32_arm_section_map *) |
| 5244 | bfd_realloc_or_free (sec_data->map, sec_data->mapsize |
| 5245 | * sizeof (elf32_arm_section_map)); |
| 5246 | } |
| 5247 | |
| 5248 | if (sec_data->map) |
| 5249 | { |
| 5250 | sec_data->map[newidx].vma = vma; |
| 5251 | sec_data->map[newidx].type = type; |
| 5252 | } |
| 5253 | } |
| 5254 | |
| 5255 | |
| 5256 | /* Record information about a VFP11 denorm-erratum veneer. Only ARM-mode |
| 5257 | veneers are handled for now. */ |
| 5258 | |
| 5259 | static bfd_vma |
| 5260 | record_vfp11_erratum_veneer (struct bfd_link_info *link_info, |
| 5261 | elf32_vfp11_erratum_list *branch, |
| 5262 | bfd *branch_bfd, |
| 5263 | asection *branch_sec, |
| 5264 | unsigned int offset) |
| 5265 | { |
| 5266 | asection *s; |
| 5267 | struct elf32_arm_link_hash_table *hash_table; |
| 5268 | char *tmp_name; |
| 5269 | struct elf_link_hash_entry *myh; |
| 5270 | struct bfd_link_hash_entry *bh; |
| 5271 | bfd_vma val; |
| 5272 | struct _arm_elf_section_data *sec_data; |
| 5273 | elf32_vfp11_erratum_list *newerr; |
| 5274 | |
| 5275 | hash_table = elf32_arm_hash_table (link_info); |
| 5276 | BFD_ASSERT (hash_table != NULL); |
| 5277 | BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL); |
| 5278 | |
| 5279 | s = bfd_get_section_by_name |
| 5280 | (hash_table->bfd_of_glue_owner, VFP11_ERRATUM_VENEER_SECTION_NAME); |
| 5281 | |
| 5282 | sec_data = elf32_arm_section_data (s); |
| 5283 | |
| 5284 | BFD_ASSERT (s != NULL); |
| 5285 | |
| 5286 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen |
| 5287 | (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10); |
| 5288 | |
| 5289 | BFD_ASSERT (tmp_name); |
| 5290 | |
| 5291 | sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME, |
| 5292 | hash_table->num_vfp11_fixes); |
| 5293 | |
| 5294 | myh = elf_link_hash_lookup |
| 5295 | (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE); |
| 5296 | |
| 5297 | BFD_ASSERT (myh == NULL); |
| 5298 | |
| 5299 | bh = NULL; |
| 5300 | val = hash_table->vfp11_erratum_glue_size; |
| 5301 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, |
| 5302 | tmp_name, BSF_FUNCTION | BSF_LOCAL, s, val, |
| 5303 | NULL, TRUE, FALSE, &bh); |
| 5304 | |
| 5305 | myh = (struct elf_link_hash_entry *) bh; |
| 5306 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 5307 | myh->forced_local = 1; |
| 5308 | |
| 5309 | /* Link veneer back to calling location. */ |
| 5310 | sec_data->erratumcount += 1; |
| 5311 | newerr = (elf32_vfp11_erratum_list *) |
| 5312 | bfd_zmalloc (sizeof (elf32_vfp11_erratum_list)); |
| 5313 | |
| 5314 | newerr->type = VFP11_ERRATUM_ARM_VENEER; |
| 5315 | newerr->vma = -1; |
| 5316 | newerr->u.v.branch = branch; |
| 5317 | newerr->u.v.id = hash_table->num_vfp11_fixes; |
| 5318 | branch->u.b.veneer = newerr; |
| 5319 | |
| 5320 | newerr->next = sec_data->erratumlist; |
| 5321 | sec_data->erratumlist = newerr; |
| 5322 | |
| 5323 | /* A symbol for the return from the veneer. */ |
| 5324 | sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r", |
| 5325 | hash_table->num_vfp11_fixes); |
| 5326 | |
| 5327 | myh = elf_link_hash_lookup |
| 5328 | (&(hash_table)->root, tmp_name, FALSE, FALSE, FALSE); |
| 5329 | |
| 5330 | if (myh != NULL) |
| 5331 | abort (); |
| 5332 | |
| 5333 | bh = NULL; |
| 5334 | val = offset + 4; |
| 5335 | _bfd_generic_link_add_one_symbol (link_info, branch_bfd, tmp_name, BSF_LOCAL, |
| 5336 | branch_sec, val, NULL, TRUE, FALSE, &bh); |
| 5337 | |
| 5338 | myh = (struct elf_link_hash_entry *) bh; |
| 5339 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 5340 | myh->forced_local = 1; |
| 5341 | |
| 5342 | free (tmp_name); |
| 5343 | |
| 5344 | /* Generate a mapping symbol for the veneer section, and explicitly add an |
| 5345 | entry for that symbol to the code/data map for the section. */ |
| 5346 | if (hash_table->vfp11_erratum_glue_size == 0) |
| 5347 | { |
| 5348 | bh = NULL; |
| 5349 | /* FIXME: Creates an ARM symbol. Thumb mode will need attention if it |
| 5350 | ever requires this erratum fix. */ |
| 5351 | _bfd_generic_link_add_one_symbol (link_info, |
| 5352 | hash_table->bfd_of_glue_owner, "$a", |
| 5353 | BSF_LOCAL, s, 0, NULL, |
| 5354 | TRUE, FALSE, &bh); |
| 5355 | |
| 5356 | myh = (struct elf_link_hash_entry *) bh; |
| 5357 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); |
| 5358 | myh->forced_local = 1; |
| 5359 | |
| 5360 | /* The elf32_arm_init_maps function only cares about symbols from input |
| 5361 | BFDs. We must make a note of this generated mapping symbol |
| 5362 | ourselves so that code byteswapping works properly in |
| 5363 | elf32_arm_write_section. */ |
| 5364 | elf32_arm_section_map_add (s, 'a', 0); |
| 5365 | } |
| 5366 | |
| 5367 | s->size += VFP11_ERRATUM_VENEER_SIZE; |
| 5368 | hash_table->vfp11_erratum_glue_size += VFP11_ERRATUM_VENEER_SIZE; |
| 5369 | hash_table->num_vfp11_fixes++; |
| 5370 | |
| 5371 | /* The offset of the veneer. */ |
| 5372 | return val; |
| 5373 | } |
| 5374 | |
| 5375 | #define ARM_GLUE_SECTION_FLAGS \ |
| 5376 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE \ |
| 5377 | | SEC_READONLY | SEC_LINKER_CREATED) |
| 5378 | |
| 5379 | /* Create a fake section for use by the ARM backend of the linker. */ |
| 5380 | |
| 5381 | static bfd_boolean |
| 5382 | arm_make_glue_section (bfd * abfd, const char * name) |
| 5383 | { |
| 5384 | asection * sec; |
| 5385 | |
| 5386 | sec = bfd_get_section_by_name (abfd, name); |
| 5387 | if (sec != NULL) |
| 5388 | /* Already made. */ |
| 5389 | return TRUE; |
| 5390 | |
| 5391 | sec = bfd_make_section_with_flags (abfd, name, ARM_GLUE_SECTION_FLAGS); |
| 5392 | |
| 5393 | if (sec == NULL |
| 5394 | || !bfd_set_section_alignment (abfd, sec, 2)) |
| 5395 | return FALSE; |
| 5396 | |
| 5397 | /* Set the gc mark to prevent the section from being removed by garbage |
| 5398 | collection, despite the fact that no relocs refer to this section. */ |
| 5399 | sec->gc_mark = 1; |
| 5400 | |
| 5401 | return TRUE; |
| 5402 | } |
| 5403 | |
| 5404 | /* Add the glue sections to ABFD. This function is called from the |
| 5405 | linker scripts in ld/emultempl/{armelf}.em. */ |
| 5406 | |
| 5407 | bfd_boolean |
| 5408 | bfd_elf32_arm_add_glue_sections_to_bfd (bfd *abfd, |
| 5409 | struct bfd_link_info *info) |
| 5410 | { |
| 5411 | /* If we are only performing a partial |
| 5412 | link do not bother adding the glue. */ |
| 5413 | if (info->relocatable) |
| 5414 | return TRUE; |
| 5415 | |
| 5416 | return arm_make_glue_section (abfd, ARM2THUMB_GLUE_SECTION_NAME) |
| 5417 | && arm_make_glue_section (abfd, THUMB2ARM_GLUE_SECTION_NAME) |
| 5418 | && arm_make_glue_section (abfd, VFP11_ERRATUM_VENEER_SECTION_NAME) |
| 5419 | && arm_make_glue_section (abfd, ARM_BX_GLUE_SECTION_NAME); |
| 5420 | } |
| 5421 | |
| 5422 | /* Select a BFD to be used to hold the sections used by the glue code. |
| 5423 | This function is called from the linker scripts in ld/emultempl/ |
| 5424 | {armelf/pe}.em. */ |
| 5425 | |
| 5426 | bfd_boolean |
| 5427 | bfd_elf32_arm_get_bfd_for_interworking (bfd *abfd, struct bfd_link_info *info) |
| 5428 | { |
| 5429 | struct elf32_arm_link_hash_table *globals; |
| 5430 | |
| 5431 | /* If we are only performing a partial link |
| 5432 | do not bother getting a bfd to hold the glue. */ |
| 5433 | if (info->relocatable) |
| 5434 | return TRUE; |
| 5435 | |
| 5436 | /* Make sure we don't attach the glue sections to a dynamic object. */ |
| 5437 | BFD_ASSERT (!(abfd->flags & DYNAMIC)); |
| 5438 | |
| 5439 | globals = elf32_arm_hash_table (info); |
| 5440 | BFD_ASSERT (globals != NULL); |
| 5441 | |
| 5442 | if (globals->bfd_of_glue_owner != NULL) |
| 5443 | return TRUE; |
| 5444 | |
| 5445 | /* Save the bfd for later use. */ |
| 5446 | globals->bfd_of_glue_owner = abfd; |
| 5447 | |
| 5448 | return TRUE; |
| 5449 | } |
| 5450 | |
| 5451 | static void |
| 5452 | check_use_blx (struct elf32_arm_link_hash_table *globals) |
| 5453 | { |
| 5454 | if (bfd_elf_get_obj_attr_int (globals->obfd, OBJ_ATTR_PROC, |
| 5455 | Tag_CPU_arch) > 2) |
| 5456 | globals->use_blx = 1; |
| 5457 | } |
| 5458 | |
| 5459 | bfd_boolean |
| 5460 | bfd_elf32_arm_process_before_allocation (bfd *abfd, |
| 5461 | struct bfd_link_info *link_info) |
| 5462 | { |
| 5463 | Elf_Internal_Shdr *symtab_hdr; |
| 5464 | Elf_Internal_Rela *internal_relocs = NULL; |
| 5465 | Elf_Internal_Rela *irel, *irelend; |
| 5466 | bfd_byte *contents = NULL; |
| 5467 | |
| 5468 | asection *sec; |
| 5469 | struct elf32_arm_link_hash_table *globals; |
| 5470 | |
| 5471 | /* If we are only performing a partial link do not bother |
| 5472 | to construct any glue. */ |
| 5473 | if (link_info->relocatable) |
| 5474 | return TRUE; |
| 5475 | |
| 5476 | /* Here we have a bfd that is to be included on the link. We have a |
| 5477 | hook to do reloc rummaging, before section sizes are nailed down. */ |
| 5478 | globals = elf32_arm_hash_table (link_info); |
| 5479 | BFD_ASSERT (globals != NULL); |
| 5480 | |
| 5481 | check_use_blx (globals); |
| 5482 | |
| 5483 | if (globals->byteswap_code && !bfd_big_endian (abfd)) |
| 5484 | { |
| 5485 | _bfd_error_handler (_("%B: BE8 images only valid in big-endian mode."), |
| 5486 | abfd); |
| 5487 | return FALSE; |
| 5488 | } |
| 5489 | |
| 5490 | /* PR 5398: If we have not decided to include any loadable sections in |
| 5491 | the output then we will not have a glue owner bfd. This is OK, it |
| 5492 | just means that there is nothing else for us to do here. */ |
| 5493 | if (globals->bfd_of_glue_owner == NULL) |
| 5494 | return TRUE; |
| 5495 | |
| 5496 | /* Rummage around all the relocs and map the glue vectors. */ |
| 5497 | sec = abfd->sections; |
| 5498 | |
| 5499 | if (sec == NULL) |
| 5500 | return TRUE; |
| 5501 | |
| 5502 | for (; sec != NULL; sec = sec->next) |
| 5503 | { |
| 5504 | if (sec->reloc_count == 0) |
| 5505 | continue; |
| 5506 | |
| 5507 | if ((sec->flags & SEC_EXCLUDE) != 0) |
| 5508 | continue; |
| 5509 | |
| 5510 | symtab_hdr = & elf_symtab_hdr (abfd); |
| 5511 | |
| 5512 | /* Load the relocs. */ |
| 5513 | internal_relocs |
| 5514 | = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, FALSE); |
| 5515 | |
| 5516 | if (internal_relocs == NULL) |
| 5517 | goto error_return; |
| 5518 | |
| 5519 | irelend = internal_relocs + sec->reloc_count; |
| 5520 | for (irel = internal_relocs; irel < irelend; irel++) |
| 5521 | { |
| 5522 | long r_type; |
| 5523 | unsigned long r_index; |
| 5524 | |
| 5525 | struct elf_link_hash_entry *h; |
| 5526 | |
| 5527 | r_type = ELF32_R_TYPE (irel->r_info); |
| 5528 | r_index = ELF32_R_SYM (irel->r_info); |
| 5529 | |
| 5530 | /* These are the only relocation types we care about. */ |
| 5531 | if ( r_type != R_ARM_PC24 |
| 5532 | && (r_type != R_ARM_V4BX || globals->fix_v4bx < 2)) |
| 5533 | continue; |
| 5534 | |
| 5535 | /* Get the section contents if we haven't done so already. */ |
| 5536 | if (contents == NULL) |
| 5537 | { |
| 5538 | /* Get cached copy if it exists. */ |
| 5539 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 5540 | contents = elf_section_data (sec)->this_hdr.contents; |
| 5541 | else |
| 5542 | { |
| 5543 | /* Go get them off disk. */ |
| 5544 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 5545 | goto error_return; |
| 5546 | } |
| 5547 | } |
| 5548 | |
| 5549 | if (r_type == R_ARM_V4BX) |
| 5550 | { |
| 5551 | int reg; |
| 5552 | |
| 5553 | reg = bfd_get_32 (abfd, contents + irel->r_offset) & 0xf; |
| 5554 | record_arm_bx_glue (link_info, reg); |
| 5555 | continue; |
| 5556 | } |
| 5557 | |
| 5558 | /* If the relocation is not against a symbol it cannot concern us. */ |
| 5559 | h = NULL; |
| 5560 | |
| 5561 | /* We don't care about local symbols. */ |
| 5562 | if (r_index < symtab_hdr->sh_info) |
| 5563 | continue; |
| 5564 | |
| 5565 | /* This is an external symbol. */ |
| 5566 | r_index -= symtab_hdr->sh_info; |
| 5567 | h = (struct elf_link_hash_entry *) |
| 5568 | elf_sym_hashes (abfd)[r_index]; |
| 5569 | |
| 5570 | /* If the relocation is against a static symbol it must be within |
| 5571 | the current section and so cannot be a cross ARM/Thumb relocation. */ |
| 5572 | if (h == NULL) |
| 5573 | continue; |
| 5574 | |
| 5575 | /* If the call will go through a PLT entry then we do not need |
| 5576 | glue. */ |
| 5577 | if (globals->splt != NULL && h->plt.offset != (bfd_vma) -1) |
| 5578 | continue; |
| 5579 | |
| 5580 | switch (r_type) |
| 5581 | { |
| 5582 | case R_ARM_PC24: |
| 5583 | /* This one is a call from arm code. We need to look up |
| 5584 | the target of the call. If it is a thumb target, we |
| 5585 | insert glue. */ |
| 5586 | if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC) |
| 5587 | record_arm_to_thumb_glue (link_info, h); |
| 5588 | break; |
| 5589 | |
| 5590 | default: |
| 5591 | abort (); |
| 5592 | } |
| 5593 | } |
| 5594 | |
| 5595 | if (contents != NULL |
| 5596 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 5597 | free (contents); |
| 5598 | contents = NULL; |
| 5599 | |
| 5600 | if (internal_relocs != NULL |
| 5601 | && elf_section_data (sec)->relocs != internal_relocs) |
| 5602 | free (internal_relocs); |
| 5603 | internal_relocs = NULL; |
| 5604 | } |
| 5605 | |
| 5606 | return TRUE; |
| 5607 | |
| 5608 | error_return: |
| 5609 | if (contents != NULL |
| 5610 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 5611 | free (contents); |
| 5612 | if (internal_relocs != NULL |
| 5613 | && elf_section_data (sec)->relocs != internal_relocs) |
| 5614 | free (internal_relocs); |
| 5615 | |
| 5616 | return FALSE; |
| 5617 | } |
| 5618 | #endif |
| 5619 | |
| 5620 | |
| 5621 | /* Initialise maps of ARM/Thumb/data for input BFDs. */ |
| 5622 | |
| 5623 | void |
| 5624 | bfd_elf32_arm_init_maps (bfd *abfd) |
| 5625 | { |
| 5626 | Elf_Internal_Sym *isymbuf; |
| 5627 | Elf_Internal_Shdr *hdr; |
| 5628 | unsigned int i, localsyms; |
| 5629 | |
| 5630 | /* PR 7093: Make sure that we are dealing with an arm elf binary. */ |
| 5631 | if (! is_arm_elf (abfd)) |
| 5632 | return; |
| 5633 | |
| 5634 | if ((abfd->flags & DYNAMIC) != 0) |
| 5635 | return; |
| 5636 | |
| 5637 | hdr = & elf_symtab_hdr (abfd); |
| 5638 | localsyms = hdr->sh_info; |
| 5639 | |
| 5640 | /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field |
| 5641 | should contain the number of local symbols, which should come before any |
| 5642 | global symbols. Mapping symbols are always local. */ |
| 5643 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, |
| 5644 | NULL); |
| 5645 | |
| 5646 | /* No internal symbols read? Skip this BFD. */ |
| 5647 | if (isymbuf == NULL) |
| 5648 | return; |
| 5649 | |
| 5650 | for (i = 0; i < localsyms; i++) |
| 5651 | { |
| 5652 | Elf_Internal_Sym *isym = &isymbuf[i]; |
| 5653 | asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 5654 | const char *name; |
| 5655 | |
| 5656 | if (sec != NULL |
| 5657 | && ELF_ST_BIND (isym->st_info) == STB_LOCAL) |
| 5658 | { |
| 5659 | name = bfd_elf_string_from_elf_section (abfd, |
| 5660 | hdr->sh_link, isym->st_name); |
| 5661 | |
| 5662 | if (bfd_is_arm_special_symbol_name (name, |
| 5663 | BFD_ARM_SPECIAL_SYM_TYPE_MAP)) |
| 5664 | elf32_arm_section_map_add (sec, name[1], isym->st_value); |
| 5665 | } |
| 5666 | } |
| 5667 | } |
| 5668 | |
| 5669 | |
| 5670 | /* Auto-select enabling of Cortex-A8 erratum fix if the user didn't explicitly |
| 5671 | say what they wanted. */ |
| 5672 | |
| 5673 | void |
| 5674 | bfd_elf32_arm_set_cortex_a8_fix (bfd *obfd, struct bfd_link_info *link_info) |
| 5675 | { |
| 5676 | struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info); |
| 5677 | obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd); |
| 5678 | |
| 5679 | if (globals == NULL) |
| 5680 | return; |
| 5681 | |
| 5682 | if (globals->fix_cortex_a8 == -1) |
| 5683 | { |
| 5684 | /* Turn on Cortex-A8 erratum workaround for ARMv7-A. */ |
| 5685 | if (out_attr[Tag_CPU_arch].i == TAG_CPU_ARCH_V7 |
| 5686 | && (out_attr[Tag_CPU_arch_profile].i == 'A' |
| 5687 | || out_attr[Tag_CPU_arch_profile].i == 0)) |
| 5688 | globals->fix_cortex_a8 = 1; |
| 5689 | else |
| 5690 | globals->fix_cortex_a8 = 0; |
| 5691 | } |
| 5692 | } |
| 5693 | |
| 5694 | |
| 5695 | void |
| 5696 | bfd_elf32_arm_set_vfp11_fix (bfd *obfd, struct bfd_link_info *link_info) |
| 5697 | { |
| 5698 | struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info); |
| 5699 | obj_attribute *out_attr = elf_known_obj_attributes_proc (obfd); |
| 5700 | |
| 5701 | if (globals == NULL) |
| 5702 | return; |
| 5703 | /* We assume that ARMv7+ does not need the VFP11 denorm erratum fix. */ |
| 5704 | if (out_attr[Tag_CPU_arch].i >= TAG_CPU_ARCH_V7) |
| 5705 | { |
| 5706 | switch (globals->vfp11_fix) |
| 5707 | { |
| 5708 | case BFD_ARM_VFP11_FIX_DEFAULT: |
| 5709 | case BFD_ARM_VFP11_FIX_NONE: |
| 5710 | globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE; |
| 5711 | break; |
| 5712 | |
| 5713 | default: |
| 5714 | /* Give a warning, but do as the user requests anyway. */ |
| 5715 | (*_bfd_error_handler) (_("%B: warning: selected VFP11 erratum " |
| 5716 | "workaround is not necessary for target architecture"), obfd); |
| 5717 | } |
| 5718 | } |
| 5719 | else if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_DEFAULT) |
| 5720 | /* For earlier architectures, we might need the workaround, but do not |
| 5721 | enable it by default. If users is running with broken hardware, they |
| 5722 | must enable the erratum fix explicitly. */ |
| 5723 | globals->vfp11_fix = BFD_ARM_VFP11_FIX_NONE; |
| 5724 | } |
| 5725 | |
| 5726 | |
| 5727 | enum bfd_arm_vfp11_pipe |
| 5728 | { |
| 5729 | VFP11_FMAC, |
| 5730 | VFP11_LS, |
| 5731 | VFP11_DS, |
| 5732 | VFP11_BAD |
| 5733 | }; |
| 5734 | |
| 5735 | /* Return a VFP register number. This is encoded as RX:X for single-precision |
| 5736 | registers, or X:RX for double-precision registers, where RX is the group of |
| 5737 | four bits in the instruction encoding and X is the single extension bit. |
| 5738 | RX and X fields are specified using their lowest (starting) bit. The return |
| 5739 | value is: |
| 5740 | |
| 5741 | 0...31: single-precision registers s0...s31 |
| 5742 | 32...63: double-precision registers d0...d31. |
| 5743 | |
| 5744 | Although X should be zero for VFP11 (encoding d0...d15 only), we might |
| 5745 | encounter VFP3 instructions, so we allow the full range for DP registers. */ |
| 5746 | |
| 5747 | static unsigned int |
| 5748 | bfd_arm_vfp11_regno (unsigned int insn, bfd_boolean is_double, unsigned int rx, |
| 5749 | unsigned int x) |
| 5750 | { |
| 5751 | if (is_double) |
| 5752 | return (((insn >> rx) & 0xf) | (((insn >> x) & 1) << 4)) + 32; |
| 5753 | else |
| 5754 | return (((insn >> rx) & 0xf) << 1) | ((insn >> x) & 1); |
| 5755 | } |
| 5756 | |
| 5757 | /* Set bits in *WMASK according to a register number REG as encoded by |
| 5758 | bfd_arm_vfp11_regno(). Ignore d16-d31. */ |
| 5759 | |
| 5760 | static void |
| 5761 | bfd_arm_vfp11_write_mask (unsigned int *wmask, unsigned int reg) |
| 5762 | { |
| 5763 | if (reg < 32) |
| 5764 | *wmask |= 1 << reg; |
| 5765 | else if (reg < 48) |
| 5766 | *wmask |= 3 << ((reg - 32) * 2); |
| 5767 | } |
| 5768 | |
| 5769 | /* Return TRUE if WMASK overwrites anything in REGS. */ |
| 5770 | |
| 5771 | static bfd_boolean |
| 5772 | bfd_arm_vfp11_antidependency (unsigned int wmask, int *regs, int numregs) |
| 5773 | { |
| 5774 | int i; |
| 5775 | |
| 5776 | for (i = 0; i < numregs; i++) |
| 5777 | { |
| 5778 | unsigned int reg = regs[i]; |
| 5779 | |
| 5780 | if (reg < 32 && (wmask & (1 << reg)) != 0) |
| 5781 | return TRUE; |
| 5782 | |
| 5783 | reg -= 32; |
| 5784 | |
| 5785 | if (reg >= 16) |
| 5786 | continue; |
| 5787 | |
| 5788 | if ((wmask & (3 << (reg * 2))) != 0) |
| 5789 | return TRUE; |
| 5790 | } |
| 5791 | |
| 5792 | return FALSE; |
| 5793 | } |
| 5794 | |
| 5795 | /* In this function, we're interested in two things: finding input registers |
| 5796 | for VFP data-processing instructions, and finding the set of registers which |
| 5797 | arbitrary VFP instructions may write to. We use a 32-bit unsigned int to |
| 5798 | hold the written set, so FLDM etc. are easy to deal with (we're only |
| 5799 | interested in 32 SP registers or 16 dp registers, due to the VFP version |
| 5800 | implemented by the chip in question). DP registers are marked by setting |
| 5801 | both SP registers in the write mask). */ |
| 5802 | |
| 5803 | static enum bfd_arm_vfp11_pipe |
| 5804 | bfd_arm_vfp11_insn_decode (unsigned int insn, unsigned int *destmask, int *regs, |
| 5805 | int *numregs) |
| 5806 | { |
| 5807 | enum bfd_arm_vfp11_pipe vpipe = VFP11_BAD; |
| 5808 | bfd_boolean is_double = ((insn & 0xf00) == 0xb00) ? 1 : 0; |
| 5809 | |
| 5810 | if ((insn & 0x0f000e10) == 0x0e000a00) /* A data-processing insn. */ |
| 5811 | { |
| 5812 | unsigned int pqrs; |
| 5813 | unsigned int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22); |
| 5814 | unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5); |
| 5815 | |
| 5816 | pqrs = ((insn & 0x00800000) >> 20) |
| 5817 | | ((insn & 0x00300000) >> 19) |
| 5818 | | ((insn & 0x00000040) >> 6); |
| 5819 | |
| 5820 | switch (pqrs) |
| 5821 | { |
| 5822 | case 0: /* fmac[sd]. */ |
| 5823 | case 1: /* fnmac[sd]. */ |
| 5824 | case 2: /* fmsc[sd]. */ |
| 5825 | case 3: /* fnmsc[sd]. */ |
| 5826 | vpipe = VFP11_FMAC; |
| 5827 | bfd_arm_vfp11_write_mask (destmask, fd); |
| 5828 | regs[0] = fd; |
| 5829 | regs[1] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */ |
| 5830 | regs[2] = fm; |
| 5831 | *numregs = 3; |
| 5832 | break; |
| 5833 | |
| 5834 | case 4: /* fmul[sd]. */ |
| 5835 | case 5: /* fnmul[sd]. */ |
| 5836 | case 6: /* fadd[sd]. */ |
| 5837 | case 7: /* fsub[sd]. */ |
| 5838 | vpipe = VFP11_FMAC; |
| 5839 | goto vfp_binop; |
| 5840 | |
| 5841 | case 8: /* fdiv[sd]. */ |
| 5842 | vpipe = VFP11_DS; |
| 5843 | vfp_binop: |
| 5844 | bfd_arm_vfp11_write_mask (destmask, fd); |
| 5845 | regs[0] = bfd_arm_vfp11_regno (insn, is_double, 16, 7); /* Fn. */ |
| 5846 | regs[1] = fm; |
| 5847 | *numregs = 2; |
| 5848 | break; |
| 5849 | |
| 5850 | case 15: /* extended opcode. */ |
| 5851 | { |
| 5852 | unsigned int extn = ((insn >> 15) & 0x1e) |
| 5853 | | ((insn >> 7) & 1); |
| 5854 | |
| 5855 | switch (extn) |
| 5856 | { |
| 5857 | case 0: /* fcpy[sd]. */ |
| 5858 | case 1: /* fabs[sd]. */ |
| 5859 | case 2: /* fneg[sd]. */ |
| 5860 | case 8: /* fcmp[sd]. */ |
| 5861 | case 9: /* fcmpe[sd]. */ |
| 5862 | case 10: /* fcmpz[sd]. */ |
| 5863 | case 11: /* fcmpez[sd]. */ |
| 5864 | case 16: /* fuito[sd]. */ |
| 5865 | case 17: /* fsito[sd]. */ |
| 5866 | case 24: /* ftoui[sd]. */ |
| 5867 | case 25: /* ftouiz[sd]. */ |
| 5868 | case 26: /* ftosi[sd]. */ |
| 5869 | case 27: /* ftosiz[sd]. */ |
| 5870 | /* These instructions will not bounce due to underflow. */ |
| 5871 | *numregs = 0; |
| 5872 | vpipe = VFP11_FMAC; |
| 5873 | break; |
| 5874 | |
| 5875 | case 3: /* fsqrt[sd]. */ |
| 5876 | /* fsqrt cannot underflow, but it can (perhaps) overwrite |
| 5877 | registers to cause the erratum in previous instructions. */ |
| 5878 | bfd_arm_vfp11_write_mask (destmask, fd); |
| 5879 | vpipe = VFP11_DS; |
| 5880 | break; |
| 5881 | |
| 5882 | case 15: /* fcvt{ds,sd}. */ |
| 5883 | { |
| 5884 | int rnum = 0; |
| 5885 | |
| 5886 | bfd_arm_vfp11_write_mask (destmask, fd); |
| 5887 | |
| 5888 | /* Only FCVTSD can underflow. */ |
| 5889 | if ((insn & 0x100) != 0) |
| 5890 | regs[rnum++] = fm; |
| 5891 | |
| 5892 | *numregs = rnum; |
| 5893 | |
| 5894 | vpipe = VFP11_FMAC; |
| 5895 | } |
| 5896 | break; |
| 5897 | |
| 5898 | default: |
| 5899 | return VFP11_BAD; |
| 5900 | } |
| 5901 | } |
| 5902 | break; |
| 5903 | |
| 5904 | default: |
| 5905 | return VFP11_BAD; |
| 5906 | } |
| 5907 | } |
| 5908 | /* Two-register transfer. */ |
| 5909 | else if ((insn & 0x0fe00ed0) == 0x0c400a10) |
| 5910 | { |
| 5911 | unsigned int fm = bfd_arm_vfp11_regno (insn, is_double, 0, 5); |
| 5912 | |
| 5913 | if ((insn & 0x100000) == 0) |
| 5914 | { |
| 5915 | if (is_double) |
| 5916 | bfd_arm_vfp11_write_mask (destmask, fm); |
| 5917 | else |
| 5918 | { |
| 5919 | bfd_arm_vfp11_write_mask (destmask, fm); |
| 5920 | bfd_arm_vfp11_write_mask (destmask, fm + 1); |
| 5921 | } |
| 5922 | } |
| 5923 | |
| 5924 | vpipe = VFP11_LS; |
| 5925 | } |
| 5926 | else if ((insn & 0x0e100e00) == 0x0c100a00) /* A load insn. */ |
| 5927 | { |
| 5928 | int fd = bfd_arm_vfp11_regno (insn, is_double, 12, 22); |
| 5929 | unsigned int puw = ((insn >> 21) & 0x1) | (((insn >> 23) & 3) << 1); |
| 5930 | |
| 5931 | switch (puw) |
| 5932 | { |
| 5933 | case 0: /* Two-reg transfer. We should catch these above. */ |
| 5934 | abort (); |
| 5935 | |
| 5936 | case 2: /* fldm[sdx]. */ |
| 5937 | case 3: |
| 5938 | case 5: |
| 5939 | { |
| 5940 | unsigned int i, offset = insn & 0xff; |
| 5941 | |
| 5942 | if (is_double) |
| 5943 | offset >>= 1; |
| 5944 | |
| 5945 | for (i = fd; i < fd + offset; i++) |
| 5946 | bfd_arm_vfp11_write_mask (destmask, i); |
| 5947 | } |
| 5948 | break; |
| 5949 | |
| 5950 | case 4: /* fld[sd]. */ |
| 5951 | case 6: |
| 5952 | bfd_arm_vfp11_write_mask (destmask, fd); |
| 5953 | break; |
| 5954 | |
| 5955 | default: |
| 5956 | return VFP11_BAD; |
| 5957 | } |
| 5958 | |
| 5959 | vpipe = VFP11_LS; |
| 5960 | } |
| 5961 | /* Single-register transfer. Note L==0. */ |
| 5962 | else if ((insn & 0x0f100e10) == 0x0e000a10) |
| 5963 | { |
| 5964 | unsigned int opcode = (insn >> 21) & 7; |
| 5965 | unsigned int fn = bfd_arm_vfp11_regno (insn, is_double, 16, 7); |
| 5966 | |
| 5967 | switch (opcode) |
| 5968 | { |
| 5969 | case 0: /* fmsr/fmdlr. */ |
| 5970 | case 1: /* fmdhr. */ |
| 5971 | /* Mark fmdhr and fmdlr as writing to the whole of the DP |
| 5972 | destination register. I don't know if this is exactly right, |
| 5973 | but it is the conservative choice. */ |
| 5974 | bfd_arm_vfp11_write_mask (destmask, fn); |
| 5975 | break; |
| 5976 | |
| 5977 | case 7: /* fmxr. */ |
| 5978 | break; |
| 5979 | } |
| 5980 | |
| 5981 | vpipe = VFP11_LS; |
| 5982 | } |
| 5983 | |
| 5984 | return vpipe; |
| 5985 | } |
| 5986 | |
| 5987 | |
| 5988 | static int elf32_arm_compare_mapping (const void * a, const void * b); |
| 5989 | |
| 5990 | |
| 5991 | /* Look for potentially-troublesome code sequences which might trigger the |
| 5992 | VFP11 denormal/antidependency erratum. See, e.g., the ARM1136 errata sheet |
| 5993 | (available from ARM) for details of the erratum. A short version is |
| 5994 | described in ld.texinfo. */ |
| 5995 | |
| 5996 | bfd_boolean |
| 5997 | bfd_elf32_arm_vfp11_erratum_scan (bfd *abfd, struct bfd_link_info *link_info) |
| 5998 | { |
| 5999 | asection *sec; |
| 6000 | bfd_byte *contents = NULL; |
| 6001 | int state = 0; |
| 6002 | int regs[3], numregs = 0; |
| 6003 | struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info); |
| 6004 | int use_vector = (globals->vfp11_fix == BFD_ARM_VFP11_FIX_VECTOR); |
| 6005 | |
| 6006 | if (globals == NULL) |
| 6007 | return FALSE; |
| 6008 | |
| 6009 | /* We use a simple FSM to match troublesome VFP11 instruction sequences. |
| 6010 | The states transition as follows: |
| 6011 | |
| 6012 | 0 -> 1 (vector) or 0 -> 2 (scalar) |
| 6013 | A VFP FMAC-pipeline instruction has been seen. Fill |
| 6014 | regs[0]..regs[numregs-1] with its input operands. Remember this |
| 6015 | instruction in 'first_fmac'. |
| 6016 | |
| 6017 | 1 -> 2 |
| 6018 | Any instruction, except for a VFP instruction which overwrites |
| 6019 | regs[*]. |
| 6020 | |
| 6021 | 1 -> 3 [ -> 0 ] or |
| 6022 | 2 -> 3 [ -> 0 ] |
| 6023 | A VFP instruction has been seen which overwrites any of regs[*]. |
| 6024 | We must make a veneer! Reset state to 0 before examining next |
| 6025 | instruction. |
| 6026 | |
| 6027 | 2 -> 0 |
| 6028 | If we fail to match anything in state 2, reset to state 0 and reset |
| 6029 | the instruction pointer to the instruction after 'first_fmac'. |
| 6030 | |
| 6031 | If the VFP11 vector mode is in use, there must be at least two unrelated |
| 6032 | instructions between anti-dependent VFP11 instructions to properly avoid |
| 6033 | triggering the erratum, hence the use of the extra state 1. */ |
| 6034 | |
| 6035 | /* If we are only performing a partial link do not bother |
| 6036 | to construct any glue. */ |
| 6037 | if (link_info->relocatable) |
| 6038 | return TRUE; |
| 6039 | |
| 6040 | /* Skip if this bfd does not correspond to an ELF image. */ |
| 6041 | if (! is_arm_elf (abfd)) |
| 6042 | return TRUE; |
| 6043 | |
| 6044 | /* We should have chosen a fix type by the time we get here. */ |
| 6045 | BFD_ASSERT (globals->vfp11_fix != BFD_ARM_VFP11_FIX_DEFAULT); |
| 6046 | |
| 6047 | if (globals->vfp11_fix == BFD_ARM_VFP11_FIX_NONE) |
| 6048 | return TRUE; |
| 6049 | |
| 6050 | /* Skip this BFD if it corresponds to an executable or dynamic object. */ |
| 6051 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
| 6052 | return TRUE; |
| 6053 | |
| 6054 | for (sec = abfd->sections; sec != NULL; sec = sec->next) |
| 6055 | { |
| 6056 | unsigned int i, span, first_fmac = 0, veneer_of_insn = 0; |
| 6057 | struct _arm_elf_section_data *sec_data; |
| 6058 | |
| 6059 | /* If we don't have executable progbits, we're not interested in this |
| 6060 | section. Also skip if section is to be excluded. */ |
| 6061 | if (elf_section_type (sec) != SHT_PROGBITS |
| 6062 | || (elf_section_flags (sec) & SHF_EXECINSTR) == 0 |
| 6063 | || (sec->flags & SEC_EXCLUDE) != 0 |
| 6064 | || sec->sec_info_type == ELF_INFO_TYPE_JUST_SYMS |
| 6065 | || sec->output_section == bfd_abs_section_ptr |
| 6066 | || strcmp (sec->name, VFP11_ERRATUM_VENEER_SECTION_NAME) == 0) |
| 6067 | continue; |
| 6068 | |
| 6069 | sec_data = elf32_arm_section_data (sec); |
| 6070 | |
| 6071 | if (sec_data->mapcount == 0) |
| 6072 | continue; |
| 6073 | |
| 6074 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 6075 | contents = elf_section_data (sec)->this_hdr.contents; |
| 6076 | else if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 6077 | goto error_return; |
| 6078 | |
| 6079 | qsort (sec_data->map, sec_data->mapcount, sizeof (elf32_arm_section_map), |
| 6080 | elf32_arm_compare_mapping); |
| 6081 | |
| 6082 | for (span = 0; span < sec_data->mapcount; span++) |
| 6083 | { |
| 6084 | unsigned int span_start = sec_data->map[span].vma; |
| 6085 | unsigned int span_end = (span == sec_data->mapcount - 1) |
| 6086 | ? sec->size : sec_data->map[span + 1].vma; |
| 6087 | char span_type = sec_data->map[span].type; |
| 6088 | |
| 6089 | /* FIXME: Only ARM mode is supported at present. We may need to |
| 6090 | support Thumb-2 mode also at some point. */ |
| 6091 | if (span_type != 'a') |
| 6092 | continue; |
| 6093 | |
| 6094 | for (i = span_start; i < span_end;) |
| 6095 | { |
| 6096 | unsigned int next_i = i + 4; |
| 6097 | unsigned int insn = bfd_big_endian (abfd) |
| 6098 | ? (contents[i] << 24) |
| 6099 | | (contents[i + 1] << 16) |
| 6100 | | (contents[i + 2] << 8) |
| 6101 | | contents[i + 3] |
| 6102 | : (contents[i + 3] << 24) |
| 6103 | | (contents[i + 2] << 16) |
| 6104 | | (contents[i + 1] << 8) |
| 6105 | | contents[i]; |
| 6106 | unsigned int writemask = 0; |
| 6107 | enum bfd_arm_vfp11_pipe vpipe; |
| 6108 | |
| 6109 | switch (state) |
| 6110 | { |
| 6111 | case 0: |
| 6112 | vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask, regs, |
| 6113 | &numregs); |
| 6114 | /* I'm assuming the VFP11 erratum can trigger with denorm |
| 6115 | operands on either the FMAC or the DS pipeline. This might |
| 6116 | lead to slightly overenthusiastic veneer insertion. */ |
| 6117 | if (vpipe == VFP11_FMAC || vpipe == VFP11_DS) |
| 6118 | { |
| 6119 | state = use_vector ? 1 : 2; |
| 6120 | first_fmac = i; |
| 6121 | veneer_of_insn = insn; |
| 6122 | } |
| 6123 | break; |
| 6124 | |
| 6125 | case 1: |
| 6126 | { |
| 6127 | int other_regs[3], other_numregs; |
| 6128 | vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask, |
| 6129 | other_regs, |
| 6130 | &other_numregs); |
| 6131 | if (vpipe != VFP11_BAD |
| 6132 | && bfd_arm_vfp11_antidependency (writemask, regs, |
| 6133 | numregs)) |
| 6134 | state = 3; |
| 6135 | else |
| 6136 | state = 2; |
| 6137 | } |
| 6138 | break; |
| 6139 | |
| 6140 | case 2: |
| 6141 | { |
| 6142 | int other_regs[3], other_numregs; |
| 6143 | vpipe = bfd_arm_vfp11_insn_decode (insn, &writemask, |
| 6144 | other_regs, |
| 6145 | &other_numregs); |
| 6146 | if (vpipe != VFP11_BAD |
| 6147 | && bfd_arm_vfp11_antidependency (writemask, regs, |
| 6148 | numregs)) |
| 6149 | state = 3; |
| 6150 | else |
| 6151 | { |
| 6152 | state = 0; |
| 6153 | next_i = first_fmac + 4; |
| 6154 | } |
| 6155 | } |
| 6156 | break; |
| 6157 | |
| 6158 | case 3: |
| 6159 | abort (); /* Should be unreachable. */ |
| 6160 | } |
| 6161 | |
| 6162 | if (state == 3) |
| 6163 | { |
| 6164 | elf32_vfp11_erratum_list *newerr =(elf32_vfp11_erratum_list *) |
| 6165 | bfd_zmalloc (sizeof (elf32_vfp11_erratum_list)); |
| 6166 | |
| 6167 | elf32_arm_section_data (sec)->erratumcount += 1; |
| 6168 | |
| 6169 | newerr->u.b.vfp_insn = veneer_of_insn; |
| 6170 | |
| 6171 | switch (span_type) |
| 6172 | { |
| 6173 | case 'a': |
| 6174 | newerr->type = VFP11_ERRATUM_BRANCH_TO_ARM_VENEER; |
| 6175 | break; |
| 6176 | |
| 6177 | default: |
| 6178 | abort (); |
| 6179 | } |
| 6180 | |
| 6181 | record_vfp11_erratum_veneer (link_info, newerr, abfd, sec, |
| 6182 | first_fmac); |
| 6183 | |
| 6184 | newerr->vma = -1; |
| 6185 | |
| 6186 | newerr->next = sec_data->erratumlist; |
| 6187 | sec_data->erratumlist = newerr; |
| 6188 | |
| 6189 | state = 0; |
| 6190 | } |
| 6191 | |
| 6192 | i = next_i; |
| 6193 | } |
| 6194 | } |
| 6195 | |
| 6196 | if (contents != NULL |
| 6197 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 6198 | free (contents); |
| 6199 | contents = NULL; |
| 6200 | } |
| 6201 | |
| 6202 | return TRUE; |
| 6203 | |
| 6204 | error_return: |
| 6205 | if (contents != NULL |
| 6206 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 6207 | free (contents); |
| 6208 | |
| 6209 | return FALSE; |
| 6210 | } |
| 6211 | |
| 6212 | /* Find virtual-memory addresses for VFP11 erratum veneers and return locations |
| 6213 | after sections have been laid out, using specially-named symbols. */ |
| 6214 | |
| 6215 | void |
| 6216 | bfd_elf32_arm_vfp11_fix_veneer_locations (bfd *abfd, |
| 6217 | struct bfd_link_info *link_info) |
| 6218 | { |
| 6219 | asection *sec; |
| 6220 | struct elf32_arm_link_hash_table *globals; |
| 6221 | char *tmp_name; |
| 6222 | |
| 6223 | if (link_info->relocatable) |
| 6224 | return; |
| 6225 | |
| 6226 | /* Skip if this bfd does not correspond to an ELF image. */ |
| 6227 | if (! is_arm_elf (abfd)) |
| 6228 | return; |
| 6229 | |
| 6230 | globals = elf32_arm_hash_table (link_info); |
| 6231 | if (globals == NULL) |
| 6232 | return; |
| 6233 | |
| 6234 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen |
| 6235 | (VFP11_ERRATUM_VENEER_ENTRY_NAME) + 10); |
| 6236 | |
| 6237 | for (sec = abfd->sections; sec != NULL; sec = sec->next) |
| 6238 | { |
| 6239 | struct _arm_elf_section_data *sec_data = elf32_arm_section_data (sec); |
| 6240 | elf32_vfp11_erratum_list *errnode = sec_data->erratumlist; |
| 6241 | |
| 6242 | for (; errnode != NULL; errnode = errnode->next) |
| 6243 | { |
| 6244 | struct elf_link_hash_entry *myh; |
| 6245 | bfd_vma vma; |
| 6246 | |
| 6247 | switch (errnode->type) |
| 6248 | { |
| 6249 | case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER: |
| 6250 | case VFP11_ERRATUM_BRANCH_TO_THUMB_VENEER: |
| 6251 | /* Find veneer symbol. */ |
| 6252 | sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME, |
| 6253 | errnode->u.b.veneer->u.v.id); |
| 6254 | |
| 6255 | myh = elf_link_hash_lookup |
| 6256 | (&(globals)->root, tmp_name, FALSE, FALSE, TRUE); |
| 6257 | |
| 6258 | if (myh == NULL) |
| 6259 | (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer " |
| 6260 | "`%s'"), abfd, tmp_name); |
| 6261 | |
| 6262 | vma = myh->root.u.def.section->output_section->vma |
| 6263 | + myh->root.u.def.section->output_offset |
| 6264 | + myh->root.u.def.value; |
| 6265 | |
| 6266 | errnode->u.b.veneer->vma = vma; |
| 6267 | break; |
| 6268 | |
| 6269 | case VFP11_ERRATUM_ARM_VENEER: |
| 6270 | case VFP11_ERRATUM_THUMB_VENEER: |
| 6271 | /* Find return location. */ |
| 6272 | sprintf (tmp_name, VFP11_ERRATUM_VENEER_ENTRY_NAME "_r", |
| 6273 | errnode->u.v.id); |
| 6274 | |
| 6275 | myh = elf_link_hash_lookup |
| 6276 | (&(globals)->root, tmp_name, FALSE, FALSE, TRUE); |
| 6277 | |
| 6278 | if (myh == NULL) |
| 6279 | (*_bfd_error_handler) (_("%B: unable to find VFP11 veneer " |
| 6280 | "`%s'"), abfd, tmp_name); |
| 6281 | |
| 6282 | vma = myh->root.u.def.section->output_section->vma |
| 6283 | + myh->root.u.def.section->output_offset |
| 6284 | + myh->root.u.def.value; |
| 6285 | |
| 6286 | errnode->u.v.branch->vma = vma; |
| 6287 | break; |
| 6288 | |
| 6289 | default: |
| 6290 | abort (); |
| 6291 | } |
| 6292 | } |
| 6293 | } |
| 6294 | |
| 6295 | free (tmp_name); |
| 6296 | } |
| 6297 | |
| 6298 | |
| 6299 | /* Set target relocation values needed during linking. */ |
| 6300 | |
| 6301 | void |
| 6302 | bfd_elf32_arm_set_target_relocs (struct bfd *output_bfd, |
| 6303 | struct bfd_link_info *link_info, |
| 6304 | int target1_is_rel, |
| 6305 | char * target2_type, |
| 6306 | int fix_v4bx, |
| 6307 | int use_blx, |
| 6308 | bfd_arm_vfp11_fix vfp11_fix, |
| 6309 | int no_enum_warn, int no_wchar_warn, |
| 6310 | int pic_veneer, int fix_cortex_a8) |
| 6311 | { |
| 6312 | struct elf32_arm_link_hash_table *globals; |
| 6313 | |
| 6314 | globals = elf32_arm_hash_table (link_info); |
| 6315 | if (globals == NULL) |
| 6316 | return; |
| 6317 | |
| 6318 | globals->target1_is_rel = target1_is_rel; |
| 6319 | if (strcmp (target2_type, "rel") == 0) |
| 6320 | globals->target2_reloc = R_ARM_REL32; |
| 6321 | else if (strcmp (target2_type, "abs") == 0) |
| 6322 | globals->target2_reloc = R_ARM_ABS32; |
| 6323 | else if (strcmp (target2_type, "got-rel") == 0) |
| 6324 | globals->target2_reloc = R_ARM_GOT_PREL; |
| 6325 | else |
| 6326 | { |
| 6327 | _bfd_error_handler (_("Invalid TARGET2 relocation type '%s'."), |
| 6328 | target2_type); |
| 6329 | } |
| 6330 | globals->fix_v4bx = fix_v4bx; |
| 6331 | globals->use_blx |= use_blx; |
| 6332 | globals->vfp11_fix = vfp11_fix; |
| 6333 | globals->pic_veneer = pic_veneer; |
| 6334 | globals->fix_cortex_a8 = fix_cortex_a8; |
| 6335 | |
| 6336 | BFD_ASSERT (is_arm_elf (output_bfd)); |
| 6337 | elf_arm_tdata (output_bfd)->no_enum_size_warning = no_enum_warn; |
| 6338 | elf_arm_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn; |
| 6339 | } |
| 6340 | |
| 6341 | /* Replace the target offset of a Thumb bl or b.w instruction. */ |
| 6342 | |
| 6343 | static void |
| 6344 | insert_thumb_branch (bfd *abfd, long int offset, bfd_byte *insn) |
| 6345 | { |
| 6346 | bfd_vma upper; |
| 6347 | bfd_vma lower; |
| 6348 | int reloc_sign; |
| 6349 | |
| 6350 | BFD_ASSERT ((offset & 1) == 0); |
| 6351 | |
| 6352 | upper = bfd_get_16 (abfd, insn); |
| 6353 | lower = bfd_get_16 (abfd, insn + 2); |
| 6354 | reloc_sign = (offset < 0) ? 1 : 0; |
| 6355 | upper = (upper & ~(bfd_vma) 0x7ff) |
| 6356 | | ((offset >> 12) & 0x3ff) |
| 6357 | | (reloc_sign << 10); |
| 6358 | lower = (lower & ~(bfd_vma) 0x2fff) |
| 6359 | | (((!((offset >> 23) & 1)) ^ reloc_sign) << 13) |
| 6360 | | (((!((offset >> 22) & 1)) ^ reloc_sign) << 11) |
| 6361 | | ((offset >> 1) & 0x7ff); |
| 6362 | bfd_put_16 (abfd, upper, insn); |
| 6363 | bfd_put_16 (abfd, lower, insn + 2); |
| 6364 | } |
| 6365 | |
| 6366 | /* Thumb code calling an ARM function. */ |
| 6367 | |
| 6368 | static int |
| 6369 | elf32_thumb_to_arm_stub (struct bfd_link_info * info, |
| 6370 | const char * name, |
| 6371 | bfd * input_bfd, |
| 6372 | bfd * output_bfd, |
| 6373 | asection * input_section, |
| 6374 | bfd_byte * hit_data, |
| 6375 | asection * sym_sec, |
| 6376 | bfd_vma offset, |
| 6377 | bfd_signed_vma addend, |
| 6378 | bfd_vma val, |
| 6379 | char **error_message) |
| 6380 | { |
| 6381 | asection * s = 0; |
| 6382 | bfd_vma my_offset; |
| 6383 | long int ret_offset; |
| 6384 | struct elf_link_hash_entry * myh; |
| 6385 | struct elf32_arm_link_hash_table * globals; |
| 6386 | |
| 6387 | myh = find_thumb_glue (info, name, error_message); |
| 6388 | if (myh == NULL) |
| 6389 | return FALSE; |
| 6390 | |
| 6391 | globals = elf32_arm_hash_table (info); |
| 6392 | BFD_ASSERT (globals != NULL); |
| 6393 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 6394 | |
| 6395 | my_offset = myh->root.u.def.value; |
| 6396 | |
| 6397 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
| 6398 | THUMB2ARM_GLUE_SECTION_NAME); |
| 6399 | |
| 6400 | BFD_ASSERT (s != NULL); |
| 6401 | BFD_ASSERT (s->contents != NULL); |
| 6402 | BFD_ASSERT (s->output_section != NULL); |
| 6403 | |
| 6404 | if ((my_offset & 0x01) == 0x01) |
| 6405 | { |
| 6406 | if (sym_sec != NULL |
| 6407 | && sym_sec->owner != NULL |
| 6408 | && !INTERWORK_FLAG (sym_sec->owner)) |
| 6409 | { |
| 6410 | (*_bfd_error_handler) |
| 6411 | (_("%B(%s): warning: interworking not enabled.\n" |
| 6412 | " first occurrence: %B: thumb call to arm"), |
| 6413 | sym_sec->owner, input_bfd, name); |
| 6414 | |
| 6415 | return FALSE; |
| 6416 | } |
| 6417 | |
| 6418 | --my_offset; |
| 6419 | myh->root.u.def.value = my_offset; |
| 6420 | |
| 6421 | put_thumb_insn (globals, output_bfd, (bfd_vma) t2a1_bx_pc_insn, |
| 6422 | s->contents + my_offset); |
| 6423 | |
| 6424 | put_thumb_insn (globals, output_bfd, (bfd_vma) t2a2_noop_insn, |
| 6425 | s->contents + my_offset + 2); |
| 6426 | |
| 6427 | ret_offset = |
| 6428 | /* Address of destination of the stub. */ |
| 6429 | ((bfd_signed_vma) val) |
| 6430 | - ((bfd_signed_vma) |
| 6431 | /* Offset from the start of the current section |
| 6432 | to the start of the stubs. */ |
| 6433 | (s->output_offset |
| 6434 | /* Offset of the start of this stub from the start of the stubs. */ |
| 6435 | + my_offset |
| 6436 | /* Address of the start of the current section. */ |
| 6437 | + s->output_section->vma) |
| 6438 | /* The branch instruction is 4 bytes into the stub. */ |
| 6439 | + 4 |
| 6440 | /* ARM branches work from the pc of the instruction + 8. */ |
| 6441 | + 8); |
| 6442 | |
| 6443 | put_arm_insn (globals, output_bfd, |
| 6444 | (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), |
| 6445 | s->contents + my_offset + 4); |
| 6446 | } |
| 6447 | |
| 6448 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); |
| 6449 | |
| 6450 | /* Now go back and fix up the original BL insn to point to here. */ |
| 6451 | ret_offset = |
| 6452 | /* Address of where the stub is located. */ |
| 6453 | (s->output_section->vma + s->output_offset + my_offset) |
| 6454 | /* Address of where the BL is located. */ |
| 6455 | - (input_section->output_section->vma + input_section->output_offset |
| 6456 | + offset) |
| 6457 | /* Addend in the relocation. */ |
| 6458 | - addend |
| 6459 | /* Biassing for PC-relative addressing. */ |
| 6460 | - 8; |
| 6461 | |
| 6462 | insert_thumb_branch (input_bfd, ret_offset, hit_data - input_section->vma); |
| 6463 | |
| 6464 | return TRUE; |
| 6465 | } |
| 6466 | |
| 6467 | /* Populate an Arm to Thumb stub. Returns the stub symbol. */ |
| 6468 | |
| 6469 | static struct elf_link_hash_entry * |
| 6470 | elf32_arm_create_thumb_stub (struct bfd_link_info * info, |
| 6471 | const char * name, |
| 6472 | bfd * input_bfd, |
| 6473 | bfd * output_bfd, |
| 6474 | asection * sym_sec, |
| 6475 | bfd_vma val, |
| 6476 | asection * s, |
| 6477 | char ** error_message) |
| 6478 | { |
| 6479 | bfd_vma my_offset; |
| 6480 | long int ret_offset; |
| 6481 | struct elf_link_hash_entry * myh; |
| 6482 | struct elf32_arm_link_hash_table * globals; |
| 6483 | |
| 6484 | myh = find_arm_glue (info, name, error_message); |
| 6485 | if (myh == NULL) |
| 6486 | return NULL; |
| 6487 | |
| 6488 | globals = elf32_arm_hash_table (info); |
| 6489 | BFD_ASSERT (globals != NULL); |
| 6490 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 6491 | |
| 6492 | my_offset = myh->root.u.def.value; |
| 6493 | |
| 6494 | if ((my_offset & 0x01) == 0x01) |
| 6495 | { |
| 6496 | if (sym_sec != NULL |
| 6497 | && sym_sec->owner != NULL |
| 6498 | && !INTERWORK_FLAG (sym_sec->owner)) |
| 6499 | { |
| 6500 | (*_bfd_error_handler) |
| 6501 | (_("%B(%s): warning: interworking not enabled.\n" |
| 6502 | " first occurrence: %B: arm call to thumb"), |
| 6503 | sym_sec->owner, input_bfd, name); |
| 6504 | } |
| 6505 | |
| 6506 | --my_offset; |
| 6507 | myh->root.u.def.value = my_offset; |
| 6508 | |
| 6509 | if (info->shared || globals->root.is_relocatable_executable |
| 6510 | || globals->pic_veneer) |
| 6511 | { |
| 6512 | /* For relocatable objects we can't use absolute addresses, |
| 6513 | so construct the address from a relative offset. */ |
| 6514 | /* TODO: If the offset is small it's probably worth |
| 6515 | constructing the address with adds. */ |
| 6516 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t1p_ldr_insn, |
| 6517 | s->contents + my_offset); |
| 6518 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t2p_add_pc_insn, |
| 6519 | s->contents + my_offset + 4); |
| 6520 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t3p_bx_r12_insn, |
| 6521 | s->contents + my_offset + 8); |
| 6522 | /* Adjust the offset by 4 for the position of the add, |
| 6523 | and 8 for the pipeline offset. */ |
| 6524 | ret_offset = (val - (s->output_offset |
| 6525 | + s->output_section->vma |
| 6526 | + my_offset + 12)) |
| 6527 | | 1; |
| 6528 | bfd_put_32 (output_bfd, ret_offset, |
| 6529 | s->contents + my_offset + 12); |
| 6530 | } |
| 6531 | else if (globals->use_blx) |
| 6532 | { |
| 6533 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t1v5_ldr_insn, |
| 6534 | s->contents + my_offset); |
| 6535 | |
| 6536 | /* It's a thumb address. Add the low order bit. */ |
| 6537 | bfd_put_32 (output_bfd, val | a2t2v5_func_addr_insn, |
| 6538 | s->contents + my_offset + 4); |
| 6539 | } |
| 6540 | else |
| 6541 | { |
| 6542 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t1_ldr_insn, |
| 6543 | s->contents + my_offset); |
| 6544 | |
| 6545 | put_arm_insn (globals, output_bfd, (bfd_vma) a2t2_bx_r12_insn, |
| 6546 | s->contents + my_offset + 4); |
| 6547 | |
| 6548 | /* It's a thumb address. Add the low order bit. */ |
| 6549 | bfd_put_32 (output_bfd, val | a2t3_func_addr_insn, |
| 6550 | s->contents + my_offset + 8); |
| 6551 | |
| 6552 | my_offset += 12; |
| 6553 | } |
| 6554 | } |
| 6555 | |
| 6556 | BFD_ASSERT (my_offset <= globals->arm_glue_size); |
| 6557 | |
| 6558 | return myh; |
| 6559 | } |
| 6560 | |
| 6561 | /* Arm code calling a Thumb function. */ |
| 6562 | |
| 6563 | static int |
| 6564 | elf32_arm_to_thumb_stub (struct bfd_link_info * info, |
| 6565 | const char * name, |
| 6566 | bfd * input_bfd, |
| 6567 | bfd * output_bfd, |
| 6568 | asection * input_section, |
| 6569 | bfd_byte * hit_data, |
| 6570 | asection * sym_sec, |
| 6571 | bfd_vma offset, |
| 6572 | bfd_signed_vma addend, |
| 6573 | bfd_vma val, |
| 6574 | char **error_message) |
| 6575 | { |
| 6576 | unsigned long int tmp; |
| 6577 | bfd_vma my_offset; |
| 6578 | asection * s; |
| 6579 | long int ret_offset; |
| 6580 | struct elf_link_hash_entry * myh; |
| 6581 | struct elf32_arm_link_hash_table * globals; |
| 6582 | |
| 6583 | globals = elf32_arm_hash_table (info); |
| 6584 | BFD_ASSERT (globals != NULL); |
| 6585 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 6586 | |
| 6587 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
| 6588 | ARM2THUMB_GLUE_SECTION_NAME); |
| 6589 | BFD_ASSERT (s != NULL); |
| 6590 | BFD_ASSERT (s->contents != NULL); |
| 6591 | BFD_ASSERT (s->output_section != NULL); |
| 6592 | |
| 6593 | myh = elf32_arm_create_thumb_stub (info, name, input_bfd, output_bfd, |
| 6594 | sym_sec, val, s, error_message); |
| 6595 | if (!myh) |
| 6596 | return FALSE; |
| 6597 | |
| 6598 | my_offset = myh->root.u.def.value; |
| 6599 | tmp = bfd_get_32 (input_bfd, hit_data); |
| 6600 | tmp = tmp & 0xFF000000; |
| 6601 | |
| 6602 | /* Somehow these are both 4 too far, so subtract 8. */ |
| 6603 | ret_offset = (s->output_offset |
| 6604 | + my_offset |
| 6605 | + s->output_section->vma |
| 6606 | - (input_section->output_offset |
| 6607 | + input_section->output_section->vma |
| 6608 | + offset + addend) |
| 6609 | - 8); |
| 6610 | |
| 6611 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); |
| 6612 | |
| 6613 | bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma); |
| 6614 | |
| 6615 | return TRUE; |
| 6616 | } |
| 6617 | |
| 6618 | /* Populate Arm stub for an exported Thumb function. */ |
| 6619 | |
| 6620 | static bfd_boolean |
| 6621 | elf32_arm_to_thumb_export_stub (struct elf_link_hash_entry *h, void * inf) |
| 6622 | { |
| 6623 | struct bfd_link_info * info = (struct bfd_link_info *) inf; |
| 6624 | asection * s; |
| 6625 | struct elf_link_hash_entry * myh; |
| 6626 | struct elf32_arm_link_hash_entry *eh; |
| 6627 | struct elf32_arm_link_hash_table * globals; |
| 6628 | asection *sec; |
| 6629 | bfd_vma val; |
| 6630 | char *error_message; |
| 6631 | |
| 6632 | eh = elf32_arm_hash_entry (h); |
| 6633 | /* Allocate stubs for exported Thumb functions on v4t. */ |
| 6634 | if (eh->export_glue == NULL) |
| 6635 | return TRUE; |
| 6636 | |
| 6637 | globals = elf32_arm_hash_table (info); |
| 6638 | BFD_ASSERT (globals != NULL); |
| 6639 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 6640 | |
| 6641 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
| 6642 | ARM2THUMB_GLUE_SECTION_NAME); |
| 6643 | BFD_ASSERT (s != NULL); |
| 6644 | BFD_ASSERT (s->contents != NULL); |
| 6645 | BFD_ASSERT (s->output_section != NULL); |
| 6646 | |
| 6647 | sec = eh->export_glue->root.u.def.section; |
| 6648 | |
| 6649 | BFD_ASSERT (sec->output_section != NULL); |
| 6650 | |
| 6651 | val = eh->export_glue->root.u.def.value + sec->output_offset |
| 6652 | + sec->output_section->vma; |
| 6653 | |
| 6654 | myh = elf32_arm_create_thumb_stub (info, h->root.root.string, |
| 6655 | h->root.u.def.section->owner, |
| 6656 | globals->obfd, sec, val, s, |
| 6657 | &error_message); |
| 6658 | BFD_ASSERT (myh); |
| 6659 | return TRUE; |
| 6660 | } |
| 6661 | |
| 6662 | /* Populate ARMv4 BX veneers. Returns the absolute adress of the veneer. */ |
| 6663 | |
| 6664 | static bfd_vma |
| 6665 | elf32_arm_bx_glue (struct bfd_link_info * info, int reg) |
| 6666 | { |
| 6667 | bfd_byte *p; |
| 6668 | bfd_vma glue_addr; |
| 6669 | asection *s; |
| 6670 | struct elf32_arm_link_hash_table *globals; |
| 6671 | |
| 6672 | globals = elf32_arm_hash_table (info); |
| 6673 | BFD_ASSERT (globals != NULL); |
| 6674 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); |
| 6675 | |
| 6676 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
| 6677 | ARM_BX_GLUE_SECTION_NAME); |
| 6678 | BFD_ASSERT (s != NULL); |
| 6679 | BFD_ASSERT (s->contents != NULL); |
| 6680 | BFD_ASSERT (s->output_section != NULL); |
| 6681 | |
| 6682 | BFD_ASSERT (globals->bx_glue_offset[reg] & 2); |
| 6683 | |
| 6684 | glue_addr = globals->bx_glue_offset[reg] & ~(bfd_vma)3; |
| 6685 | |
| 6686 | if ((globals->bx_glue_offset[reg] & 1) == 0) |
| 6687 | { |
| 6688 | p = s->contents + glue_addr; |
| 6689 | bfd_put_32 (globals->obfd, armbx1_tst_insn + (reg << 16), p); |
| 6690 | bfd_put_32 (globals->obfd, armbx2_moveq_insn + reg, p + 4); |
| 6691 | bfd_put_32 (globals->obfd, armbx3_bx_insn + reg, p + 8); |
| 6692 | globals->bx_glue_offset[reg] |= 1; |
| 6693 | } |
| 6694 | |
| 6695 | return glue_addr + s->output_section->vma + s->output_offset; |
| 6696 | } |
| 6697 | |
| 6698 | /* Generate Arm stubs for exported Thumb symbols. */ |
| 6699 | static void |
| 6700 | elf32_arm_begin_write_processing (bfd *abfd ATTRIBUTE_UNUSED, |
| 6701 | struct bfd_link_info *link_info) |
| 6702 | { |
| 6703 | struct elf32_arm_link_hash_table * globals; |
| 6704 | |
| 6705 | if (link_info == NULL) |
| 6706 | /* Ignore this if we are not called by the ELF backend linker. */ |
| 6707 | return; |
| 6708 | |
| 6709 | globals = elf32_arm_hash_table (link_info); |
| 6710 | if (globals == NULL) |
| 6711 | return; |
| 6712 | |
| 6713 | /* If blx is available then exported Thumb symbols are OK and there is |
| 6714 | nothing to do. */ |
| 6715 | if (globals->use_blx) |
| 6716 | return; |
| 6717 | |
| 6718 | elf_link_hash_traverse (&globals->root, elf32_arm_to_thumb_export_stub, |
| 6719 | link_info); |
| 6720 | } |
| 6721 | |
| 6722 | /* Some relocations map to different relocations depending on the |
| 6723 | target. Return the real relocation. */ |
| 6724 | |
| 6725 | static int |
| 6726 | arm_real_reloc_type (struct elf32_arm_link_hash_table * globals, |
| 6727 | int r_type) |
| 6728 | { |
| 6729 | switch (r_type) |
| 6730 | { |
| 6731 | case R_ARM_TARGET1: |
| 6732 | if (globals->target1_is_rel) |
| 6733 | return R_ARM_REL32; |
| 6734 | else |
| 6735 | return R_ARM_ABS32; |
| 6736 | |
| 6737 | case R_ARM_TARGET2: |
| 6738 | return globals->target2_reloc; |
| 6739 | |
| 6740 | default: |
| 6741 | return r_type; |
| 6742 | } |
| 6743 | } |
| 6744 | |
| 6745 | /* Return the base VMA address which should be subtracted from real addresses |
| 6746 | when resolving @dtpoff relocation. |
| 6747 | This is PT_TLS segment p_vaddr. */ |
| 6748 | |
| 6749 | static bfd_vma |
| 6750 | dtpoff_base (struct bfd_link_info *info) |
| 6751 | { |
| 6752 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 6753 | if (elf_hash_table (info)->tls_sec == NULL) |
| 6754 | return 0; |
| 6755 | return elf_hash_table (info)->tls_sec->vma; |
| 6756 | } |
| 6757 | |
| 6758 | /* Return the relocation value for @tpoff relocation |
| 6759 | if STT_TLS virtual address is ADDRESS. */ |
| 6760 | |
| 6761 | static bfd_vma |
| 6762 | tpoff (struct bfd_link_info *info, bfd_vma address) |
| 6763 | { |
| 6764 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 6765 | bfd_vma base; |
| 6766 | |
| 6767 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 6768 | if (htab->tls_sec == NULL) |
| 6769 | return 0; |
| 6770 | base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power); |
| 6771 | return address - htab->tls_sec->vma + base; |
| 6772 | } |
| 6773 | |
| 6774 | /* Perform an R_ARM_ABS12 relocation on the field pointed to by DATA. |
| 6775 | VALUE is the relocation value. */ |
| 6776 | |
| 6777 | static bfd_reloc_status_type |
| 6778 | elf32_arm_abs12_reloc (bfd *abfd, void *data, bfd_vma value) |
| 6779 | { |
| 6780 | if (value > 0xfff) |
| 6781 | return bfd_reloc_overflow; |
| 6782 | |
| 6783 | value |= bfd_get_32 (abfd, data) & 0xfffff000; |
| 6784 | bfd_put_32 (abfd, value, data); |
| 6785 | return bfd_reloc_ok; |
| 6786 | } |
| 6787 | |
| 6788 | /* For a given value of n, calculate the value of G_n as required to |
| 6789 | deal with group relocations. We return it in the form of an |
| 6790 | encoded constant-and-rotation, together with the final residual. If n is |
| 6791 | specified as less than zero, then final_residual is filled with the |
| 6792 | input value and no further action is performed. */ |
| 6793 | |
| 6794 | static bfd_vma |
| 6795 | calculate_group_reloc_mask (bfd_vma value, int n, bfd_vma *final_residual) |
| 6796 | { |
| 6797 | int current_n; |
| 6798 | bfd_vma g_n; |
| 6799 | bfd_vma encoded_g_n = 0; |
| 6800 | bfd_vma residual = value; /* Also known as Y_n. */ |
| 6801 | |
| 6802 | for (current_n = 0; current_n <= n; current_n++) |
| 6803 | { |
| 6804 | int shift; |
| 6805 | |
| 6806 | /* Calculate which part of the value to mask. */ |
| 6807 | if (residual == 0) |
| 6808 | shift = 0; |
| 6809 | else |
| 6810 | { |
| 6811 | int msb; |
| 6812 | |
| 6813 | /* Determine the most significant bit in the residual and |
| 6814 | align the resulting value to a 2-bit boundary. */ |
| 6815 | for (msb = 30; msb >= 0; msb -= 2) |
| 6816 | if (residual & (3 << msb)) |
| 6817 | break; |
| 6818 | |
| 6819 | /* The desired shift is now (msb - 6), or zero, whichever |
| 6820 | is the greater. */ |
| 6821 | shift = msb - 6; |
| 6822 | if (shift < 0) |
| 6823 | shift = 0; |
| 6824 | } |
| 6825 | |
| 6826 | /* Calculate g_n in 32-bit as well as encoded constant+rotation form. */ |
| 6827 | g_n = residual & (0xff << shift); |
| 6828 | encoded_g_n = (g_n >> shift) |
| 6829 | | ((g_n <= 0xff ? 0 : (32 - shift) / 2) << 8); |
| 6830 | |
| 6831 | /* Calculate the residual for the next time around. */ |
| 6832 | residual &= ~g_n; |
| 6833 | } |
| 6834 | |
| 6835 | *final_residual = residual; |
| 6836 | |
| 6837 | return encoded_g_n; |
| 6838 | } |
| 6839 | |
| 6840 | /* Given an ARM instruction, determine whether it is an ADD or a SUB. |
| 6841 | Returns 1 if it is an ADD, -1 if it is a SUB, and 0 otherwise. */ |
| 6842 | |
| 6843 | static int |
| 6844 | identify_add_or_sub (bfd_vma insn) |
| 6845 | { |
| 6846 | int opcode = insn & 0x1e00000; |
| 6847 | |
| 6848 | if (opcode == 1 << 23) /* ADD */ |
| 6849 | return 1; |
| 6850 | |
| 6851 | if (opcode == 1 << 22) /* SUB */ |
| 6852 | return -1; |
| 6853 | |
| 6854 | return 0; |
| 6855 | } |
| 6856 | |
| 6857 | /* Perform a relocation as part of a final link. */ |
| 6858 | |
| 6859 | static bfd_reloc_status_type |
| 6860 | elf32_arm_final_link_relocate (reloc_howto_type * howto, |
| 6861 | bfd * input_bfd, |
| 6862 | bfd * output_bfd, |
| 6863 | asection * input_section, |
| 6864 | bfd_byte * contents, |
| 6865 | Elf_Internal_Rela * rel, |
| 6866 | bfd_vma value, |
| 6867 | struct bfd_link_info * info, |
| 6868 | asection * sym_sec, |
| 6869 | const char * sym_name, |
| 6870 | int sym_flags, |
| 6871 | struct elf_link_hash_entry * h, |
| 6872 | bfd_boolean * unresolved_reloc_p, |
| 6873 | char ** error_message) |
| 6874 | { |
| 6875 | unsigned long r_type = howto->type; |
| 6876 | unsigned long r_symndx; |
| 6877 | bfd_byte * hit_data = contents + rel->r_offset; |
| 6878 | bfd * dynobj = NULL; |
| 6879 | bfd_vma * local_got_offsets; |
| 6880 | asection * sgot = NULL; |
| 6881 | asection * splt = NULL; |
| 6882 | asection * sreloc = NULL; |
| 6883 | bfd_vma addend; |
| 6884 | bfd_signed_vma signed_addend; |
| 6885 | struct elf32_arm_link_hash_table * globals; |
| 6886 | |
| 6887 | globals = elf32_arm_hash_table (info); |
| 6888 | if (globals == NULL) |
| 6889 | return bfd_reloc_notsupported; |
| 6890 | |
| 6891 | BFD_ASSERT (is_arm_elf (input_bfd)); |
| 6892 | |
| 6893 | /* Some relocation types map to different relocations depending on the |
| 6894 | target. We pick the right one here. */ |
| 6895 | r_type = arm_real_reloc_type (globals, r_type); |
| 6896 | if (r_type != howto->type) |
| 6897 | howto = elf32_arm_howto_from_type (r_type); |
| 6898 | |
| 6899 | /* If the start address has been set, then set the EF_ARM_HASENTRY |
| 6900 | flag. Setting this more than once is redundant, but the cost is |
| 6901 | not too high, and it keeps the code simple. |
| 6902 | |
| 6903 | The test is done here, rather than somewhere else, because the |
| 6904 | start address is only set just before the final link commences. |
| 6905 | |
| 6906 | Note - if the user deliberately sets a start address of 0, the |
| 6907 | flag will not be set. */ |
| 6908 | if (bfd_get_start_address (output_bfd) != 0) |
| 6909 | elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY; |
| 6910 | |
| 6911 | dynobj = elf_hash_table (info)->dynobj; |
| 6912 | if (dynobj) |
| 6913 | { |
| 6914 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 6915 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 6916 | } |
| 6917 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 6918 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 6919 | |
| 6920 | if (globals->use_rel) |
| 6921 | { |
| 6922 | addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask; |
| 6923 | |
| 6924 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 6925 | { |
| 6926 | signed_addend = -1; |
| 6927 | signed_addend &= ~ howto->src_mask; |
| 6928 | signed_addend |= addend; |
| 6929 | } |
| 6930 | else |
| 6931 | signed_addend = addend; |
| 6932 | } |
| 6933 | else |
| 6934 | addend = signed_addend = rel->r_addend; |
| 6935 | |
| 6936 | switch (r_type) |
| 6937 | { |
| 6938 | case R_ARM_NONE: |
| 6939 | /* We don't need to find a value for this symbol. It's just a |
| 6940 | marker. */ |
| 6941 | *unresolved_reloc_p = FALSE; |
| 6942 | return bfd_reloc_ok; |
| 6943 | |
| 6944 | case R_ARM_ABS12: |
| 6945 | if (!globals->vxworks_p) |
| 6946 | return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend); |
| 6947 | |
| 6948 | case R_ARM_PC24: |
| 6949 | case R_ARM_ABS32: |
| 6950 | case R_ARM_ABS32_NOI: |
| 6951 | case R_ARM_REL32: |
| 6952 | case R_ARM_REL32_NOI: |
| 6953 | case R_ARM_CALL: |
| 6954 | case R_ARM_JUMP24: |
| 6955 | case R_ARM_XPC25: |
| 6956 | case R_ARM_PREL31: |
| 6957 | case R_ARM_PLT32: |
| 6958 | /* Handle relocations which should use the PLT entry. ABS32/REL32 |
| 6959 | will use the symbol's value, which may point to a PLT entry, but we |
| 6960 | don't need to handle that here. If we created a PLT entry, all |
| 6961 | branches in this object should go to it, except if the PLT is too |
| 6962 | far away, in which case a long branch stub should be inserted. */ |
| 6963 | if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32 |
| 6964 | && r_type != R_ARM_ABS32_NOI && r_type != R_ARM_REL32_NOI |
| 6965 | && r_type != R_ARM_CALL |
| 6966 | && r_type != R_ARM_JUMP24 |
| 6967 | && r_type != R_ARM_PLT32) |
| 6968 | && h != NULL |
| 6969 | && splt != NULL |
| 6970 | && h->plt.offset != (bfd_vma) -1) |
| 6971 | { |
| 6972 | /* If we've created a .plt section, and assigned a PLT entry to |
| 6973 | this function, it should not be known to bind locally. If |
| 6974 | it were, we would have cleared the PLT entry. */ |
| 6975 | BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); |
| 6976 | |
| 6977 | value = (splt->output_section->vma |
| 6978 | + splt->output_offset |
| 6979 | + h->plt.offset); |
| 6980 | *unresolved_reloc_p = FALSE; |
| 6981 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 6982 | contents, rel->r_offset, value, |
| 6983 | rel->r_addend); |
| 6984 | } |
| 6985 | |
| 6986 | /* When generating a shared object or relocatable executable, these |
| 6987 | relocations are copied into the output file to be resolved at |
| 6988 | run time. */ |
| 6989 | if ((info->shared || globals->root.is_relocatable_executable) |
| 6990 | && (input_section->flags & SEC_ALLOC) |
| 6991 | && !(globals->vxworks_p |
| 6992 | && strcmp (input_section->output_section->name, |
| 6993 | ".tls_vars") == 0) |
| 6994 | && ((r_type != R_ARM_REL32 && r_type != R_ARM_REL32_NOI) |
| 6995 | || !SYMBOL_CALLS_LOCAL (info, h)) |
| 6996 | && (!strstr (input_section->name, STUB_SUFFIX)) |
| 6997 | && (h == NULL |
| 6998 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 6999 | || h->root.type != bfd_link_hash_undefweak) |
| 7000 | && r_type != R_ARM_PC24 |
| 7001 | && r_type != R_ARM_CALL |
| 7002 | && r_type != R_ARM_JUMP24 |
| 7003 | && r_type != R_ARM_PREL31 |
| 7004 | && r_type != R_ARM_PLT32) |
| 7005 | { |
| 7006 | Elf_Internal_Rela outrel; |
| 7007 | bfd_byte *loc; |
| 7008 | bfd_boolean skip, relocate; |
| 7009 | |
| 7010 | *unresolved_reloc_p = FALSE; |
| 7011 | |
| 7012 | if (sreloc == NULL) |
| 7013 | { |
| 7014 | sreloc = _bfd_elf_get_dynamic_reloc_section (input_bfd, input_section, |
| 7015 | ! globals->use_rel); |
| 7016 | |
| 7017 | if (sreloc == NULL) |
| 7018 | return bfd_reloc_notsupported; |
| 7019 | } |
| 7020 | |
| 7021 | skip = FALSE; |
| 7022 | relocate = FALSE; |
| 7023 | |
| 7024 | outrel.r_addend = addend; |
| 7025 | outrel.r_offset = |
| 7026 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 7027 | rel->r_offset); |
| 7028 | if (outrel.r_offset == (bfd_vma) -1) |
| 7029 | skip = TRUE; |
| 7030 | else if (outrel.r_offset == (bfd_vma) -2) |
| 7031 | skip = TRUE, relocate = TRUE; |
| 7032 | outrel.r_offset += (input_section->output_section->vma |
| 7033 | + input_section->output_offset); |
| 7034 | |
| 7035 | if (skip) |
| 7036 | memset (&outrel, 0, sizeof outrel); |
| 7037 | else if (h != NULL |
| 7038 | && h->dynindx != -1 |
| 7039 | && (!info->shared |
| 7040 | || !info->symbolic |
| 7041 | || !h->def_regular)) |
| 7042 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 7043 | else |
| 7044 | { |
| 7045 | int symbol; |
| 7046 | |
| 7047 | /* This symbol is local, or marked to become local. */ |
| 7048 | if (sym_flags == STT_ARM_TFUNC) |
| 7049 | value |= 1; |
| 7050 | if (globals->symbian_p) |
| 7051 | { |
| 7052 | asection *osec; |
| 7053 | |
| 7054 | /* On Symbian OS, the data segment and text segement |
| 7055 | can be relocated independently. Therefore, we |
| 7056 | must indicate the segment to which this |
| 7057 | relocation is relative. The BPABI allows us to |
| 7058 | use any symbol in the right segment; we just use |
| 7059 | the section symbol as it is convenient. (We |
| 7060 | cannot use the symbol given by "h" directly as it |
| 7061 | will not appear in the dynamic symbol table.) |
| 7062 | |
| 7063 | Note that the dynamic linker ignores the section |
| 7064 | symbol value, so we don't subtract osec->vma |
| 7065 | from the emitted reloc addend. */ |
| 7066 | if (sym_sec) |
| 7067 | osec = sym_sec->output_section; |
| 7068 | else |
| 7069 | osec = input_section->output_section; |
| 7070 | symbol = elf_section_data (osec)->dynindx; |
| 7071 | if (symbol == 0) |
| 7072 | { |
| 7073 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 7074 | |
| 7075 | if ((osec->flags & SEC_READONLY) == 0 |
| 7076 | && htab->data_index_section != NULL) |
| 7077 | osec = htab->data_index_section; |
| 7078 | else |
| 7079 | osec = htab->text_index_section; |
| 7080 | symbol = elf_section_data (osec)->dynindx; |
| 7081 | } |
| 7082 | BFD_ASSERT (symbol != 0); |
| 7083 | } |
| 7084 | else |
| 7085 | /* On SVR4-ish systems, the dynamic loader cannot |
| 7086 | relocate the text and data segments independently, |
| 7087 | so the symbol does not matter. */ |
| 7088 | symbol = 0; |
| 7089 | outrel.r_info = ELF32_R_INFO (symbol, R_ARM_RELATIVE); |
| 7090 | if (globals->use_rel) |
| 7091 | relocate = TRUE; |
| 7092 | else |
| 7093 | outrel.r_addend += value; |
| 7094 | } |
| 7095 | |
| 7096 | loc = sreloc->contents; |
| 7097 | loc += sreloc->reloc_count++ * RELOC_SIZE (globals); |
| 7098 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 7099 | |
| 7100 | /* If this reloc is against an external symbol, we do not want to |
| 7101 | fiddle with the addend. Otherwise, we need to include the symbol |
| 7102 | value so that it becomes an addend for the dynamic reloc. */ |
| 7103 | if (! relocate) |
| 7104 | return bfd_reloc_ok; |
| 7105 | |
| 7106 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 7107 | contents, rel->r_offset, value, |
| 7108 | (bfd_vma) 0); |
| 7109 | } |
| 7110 | else switch (r_type) |
| 7111 | { |
| 7112 | case R_ARM_ABS12: |
| 7113 | return elf32_arm_abs12_reloc (input_bfd, hit_data, value + addend); |
| 7114 | |
| 7115 | case R_ARM_XPC25: /* Arm BLX instruction. */ |
| 7116 | case R_ARM_CALL: |
| 7117 | case R_ARM_JUMP24: |
| 7118 | case R_ARM_PC24: /* Arm B/BL instruction. */ |
| 7119 | case R_ARM_PLT32: |
| 7120 | { |
| 7121 | struct elf32_arm_stub_hash_entry *stub_entry = NULL; |
| 7122 | |
| 7123 | if (r_type == R_ARM_XPC25) |
| 7124 | { |
| 7125 | /* Check for Arm calling Arm function. */ |
| 7126 | /* FIXME: Should we translate the instruction into a BL |
| 7127 | instruction instead ? */ |
| 7128 | if (sym_flags != STT_ARM_TFUNC) |
| 7129 | (*_bfd_error_handler) |
| 7130 | (_("\%B: Warning: Arm BLX instruction targets Arm function '%s'."), |
| 7131 | input_bfd, |
| 7132 | h ? h->root.root.string : "(local)"); |
| 7133 | } |
| 7134 | else if (r_type == R_ARM_PC24) |
| 7135 | { |
| 7136 | /* Check for Arm calling Thumb function. */ |
| 7137 | if (sym_flags == STT_ARM_TFUNC) |
| 7138 | { |
| 7139 | if (elf32_arm_to_thumb_stub (info, sym_name, input_bfd, |
| 7140 | output_bfd, input_section, |
| 7141 | hit_data, sym_sec, rel->r_offset, |
| 7142 | signed_addend, value, |
| 7143 | error_message)) |
| 7144 | return bfd_reloc_ok; |
| 7145 | else |
| 7146 | return bfd_reloc_dangerous; |
| 7147 | } |
| 7148 | } |
| 7149 | |
| 7150 | /* Check if a stub has to be inserted because the |
| 7151 | destination is too far or we are changing mode. */ |
| 7152 | if ( r_type == R_ARM_CALL |
| 7153 | || r_type == R_ARM_JUMP24 |
| 7154 | || r_type == R_ARM_PLT32) |
| 7155 | { |
| 7156 | enum elf32_arm_stub_type stub_type = arm_stub_none; |
| 7157 | struct elf32_arm_link_hash_entry *hash; |
| 7158 | |
| 7159 | hash = (struct elf32_arm_link_hash_entry *) h; |
| 7160 | stub_type = arm_type_of_stub (info, input_section, rel, |
| 7161 | &sym_flags, hash, |
| 7162 | value, sym_sec, |
| 7163 | input_bfd, sym_name); |
| 7164 | |
| 7165 | if (stub_type != arm_stub_none) |
| 7166 | { |
| 7167 | /* The target is out of reach, so redirect the |
| 7168 | branch to the local stub for this function. */ |
| 7169 | |
| 7170 | stub_entry = elf32_arm_get_stub_entry (input_section, |
| 7171 | sym_sec, h, |
| 7172 | rel, globals, |
| 7173 | stub_type); |
| 7174 | if (stub_entry != NULL) |
| 7175 | value = (stub_entry->stub_offset |
| 7176 | + stub_entry->stub_sec->output_offset |
| 7177 | + stub_entry->stub_sec->output_section->vma); |
| 7178 | } |
| 7179 | else |
| 7180 | { |
| 7181 | /* If the call goes through a PLT entry, make sure to |
| 7182 | check distance to the right destination address. */ |
| 7183 | if (h != NULL |
| 7184 | && splt != NULL |
| 7185 | && h->plt.offset != (bfd_vma) -1) |
| 7186 | { |
| 7187 | value = (splt->output_section->vma |
| 7188 | + splt->output_offset |
| 7189 | + h->plt.offset); |
| 7190 | *unresolved_reloc_p = FALSE; |
| 7191 | /* The PLT entry is in ARM mode, regardless of the |
| 7192 | target function. */ |
| 7193 | sym_flags = STT_FUNC; |
| 7194 | } |
| 7195 | } |
| 7196 | } |
| 7197 | |
| 7198 | /* The ARM ELF ABI says that this reloc is computed as: S - P + A |
| 7199 | where: |
| 7200 | S is the address of the symbol in the relocation. |
| 7201 | P is address of the instruction being relocated. |
| 7202 | A is the addend (extracted from the instruction) in bytes. |
| 7203 | |
| 7204 | S is held in 'value'. |
| 7205 | P is the base address of the section containing the |
| 7206 | instruction plus the offset of the reloc into that |
| 7207 | section, ie: |
| 7208 | (input_section->output_section->vma + |
| 7209 | input_section->output_offset + |
| 7210 | rel->r_offset). |
| 7211 | A is the addend, converted into bytes, ie: |
| 7212 | (signed_addend * 4) |
| 7213 | |
| 7214 | Note: None of these operations have knowledge of the pipeline |
| 7215 | size of the processor, thus it is up to the assembler to |
| 7216 | encode this information into the addend. */ |
| 7217 | value -= (input_section->output_section->vma |
| 7218 | + input_section->output_offset); |
| 7219 | value -= rel->r_offset; |
| 7220 | if (globals->use_rel) |
| 7221 | value += (signed_addend << howto->size); |
| 7222 | else |
| 7223 | /* RELA addends do not have to be adjusted by howto->size. */ |
| 7224 | value += signed_addend; |
| 7225 | |
| 7226 | signed_addend = value; |
| 7227 | signed_addend >>= howto->rightshift; |
| 7228 | |
| 7229 | /* A branch to an undefined weak symbol is turned into a jump to |
| 7230 | the next instruction unless a PLT entry will be created. |
| 7231 | Do the same for local undefined symbols (but not for STN_UNDEF). |
| 7232 | The jump to the next instruction is optimized as a NOP depending |
| 7233 | on the architecture. */ |
| 7234 | if (h ? (h->root.type == bfd_link_hash_undefweak |
| 7235 | && !(splt != NULL && h->plt.offset != (bfd_vma) -1)) |
| 7236 | : r_symndx != STN_UNDEF && bfd_is_und_section (sym_sec)) |
| 7237 | { |
| 7238 | value = (bfd_get_32 (input_bfd, hit_data) & 0xf0000000); |
| 7239 | |
| 7240 | if (arch_has_arm_nop (globals)) |
| 7241 | value |= 0x0320f000; |
| 7242 | else |
| 7243 | value |= 0x01a00000; /* Using pre-UAL nop: mov r0, r0. */ |
| 7244 | } |
| 7245 | else |
| 7246 | { |
| 7247 | /* Perform a signed range check. */ |
| 7248 | if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1)) |
| 7249 | || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) |
| 7250 | return bfd_reloc_overflow; |
| 7251 | |
| 7252 | addend = (value & 2); |
| 7253 | |
| 7254 | value = (signed_addend & howto->dst_mask) |
| 7255 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); |
| 7256 | |
| 7257 | if (r_type == R_ARM_CALL) |
| 7258 | { |
| 7259 | /* Set the H bit in the BLX instruction. */ |
| 7260 | if (sym_flags == STT_ARM_TFUNC) |
| 7261 | { |
| 7262 | if (addend) |
| 7263 | value |= (1 << 24); |
| 7264 | else |
| 7265 | value &= ~(bfd_vma)(1 << 24); |
| 7266 | } |
| 7267 | |
| 7268 | /* Select the correct instruction (BL or BLX). */ |
| 7269 | /* Only if we are not handling a BL to a stub. In this |
| 7270 | case, mode switching is performed by the stub. */ |
| 7271 | if (sym_flags == STT_ARM_TFUNC && !stub_entry) |
| 7272 | value |= (1 << 28); |
| 7273 | else |
| 7274 | { |
| 7275 | value &= ~(bfd_vma)(1 << 28); |
| 7276 | value |= (1 << 24); |
| 7277 | } |
| 7278 | } |
| 7279 | } |
| 7280 | } |
| 7281 | break; |
| 7282 | |
| 7283 | case R_ARM_ABS32: |
| 7284 | value += addend; |
| 7285 | if (sym_flags == STT_ARM_TFUNC) |
| 7286 | value |= 1; |
| 7287 | break; |
| 7288 | |
| 7289 | case R_ARM_ABS32_NOI: |
| 7290 | value += addend; |
| 7291 | break; |
| 7292 | |
| 7293 | case R_ARM_REL32: |
| 7294 | value += addend; |
| 7295 | if (sym_flags == STT_ARM_TFUNC) |
| 7296 | value |= 1; |
| 7297 | value -= (input_section->output_section->vma |
| 7298 | + input_section->output_offset + rel->r_offset); |
| 7299 | break; |
| 7300 | |
| 7301 | case R_ARM_REL32_NOI: |
| 7302 | value += addend; |
| 7303 | value -= (input_section->output_section->vma |
| 7304 | + input_section->output_offset + rel->r_offset); |
| 7305 | break; |
| 7306 | |
| 7307 | case R_ARM_PREL31: |
| 7308 | value -= (input_section->output_section->vma |
| 7309 | + input_section->output_offset + rel->r_offset); |
| 7310 | value += signed_addend; |
| 7311 | if (! h || h->root.type != bfd_link_hash_undefweak) |
| 7312 | { |
| 7313 | /* Check for overflow. */ |
| 7314 | if ((value ^ (value >> 1)) & (1 << 30)) |
| 7315 | return bfd_reloc_overflow; |
| 7316 | } |
| 7317 | value &= 0x7fffffff; |
| 7318 | value |= (bfd_get_32 (input_bfd, hit_data) & 0x80000000); |
| 7319 | if (sym_flags == STT_ARM_TFUNC) |
| 7320 | value |= 1; |
| 7321 | break; |
| 7322 | } |
| 7323 | |
| 7324 | bfd_put_32 (input_bfd, value, hit_data); |
| 7325 | return bfd_reloc_ok; |
| 7326 | |
| 7327 | case R_ARM_ABS8: |
| 7328 | value += addend; |
| 7329 | |
| 7330 | /* There is no way to tell whether the user intended to use a signed or |
| 7331 | unsigned addend. When checking for overflow we accept either, |
| 7332 | as specified by the AAELF. */ |
| 7333 | if ((long) value > 0xff || (long) value < -0x80) |
| 7334 | return bfd_reloc_overflow; |
| 7335 | |
| 7336 | bfd_put_8 (input_bfd, value, hit_data); |
| 7337 | return bfd_reloc_ok; |
| 7338 | |
| 7339 | case R_ARM_ABS16: |
| 7340 | value += addend; |
| 7341 | |
| 7342 | /* See comment for R_ARM_ABS8. */ |
| 7343 | if ((long) value > 0xffff || (long) value < -0x8000) |
| 7344 | return bfd_reloc_overflow; |
| 7345 | |
| 7346 | bfd_put_16 (input_bfd, value, hit_data); |
| 7347 | return bfd_reloc_ok; |
| 7348 | |
| 7349 | case R_ARM_THM_ABS5: |
| 7350 | /* Support ldr and str instructions for the thumb. */ |
| 7351 | if (globals->use_rel) |
| 7352 | { |
| 7353 | /* Need to refetch addend. */ |
| 7354 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; |
| 7355 | /* ??? Need to determine shift amount from operand size. */ |
| 7356 | addend >>= howto->rightshift; |
| 7357 | } |
| 7358 | value += addend; |
| 7359 | |
| 7360 | /* ??? Isn't value unsigned? */ |
| 7361 | if ((long) value > 0x1f || (long) value < -0x10) |
| 7362 | return bfd_reloc_overflow; |
| 7363 | |
| 7364 | /* ??? Value needs to be properly shifted into place first. */ |
| 7365 | value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f; |
| 7366 | bfd_put_16 (input_bfd, value, hit_data); |
| 7367 | return bfd_reloc_ok; |
| 7368 | |
| 7369 | case R_ARM_THM_ALU_PREL_11_0: |
| 7370 | /* Corresponds to: addw.w reg, pc, #offset (and similarly for subw). */ |
| 7371 | { |
| 7372 | bfd_vma insn; |
| 7373 | bfd_signed_vma relocation; |
| 7374 | |
| 7375 | insn = (bfd_get_16 (input_bfd, hit_data) << 16) |
| 7376 | | bfd_get_16 (input_bfd, hit_data + 2); |
| 7377 | |
| 7378 | if (globals->use_rel) |
| 7379 | { |
| 7380 | signed_addend = (insn & 0xff) | ((insn & 0x7000) >> 4) |
| 7381 | | ((insn & (1 << 26)) >> 15); |
| 7382 | if (insn & 0xf00000) |
| 7383 | signed_addend = -signed_addend; |
| 7384 | } |
| 7385 | |
| 7386 | relocation = value + signed_addend; |
| 7387 | relocation -= (input_section->output_section->vma |
| 7388 | + input_section->output_offset |
| 7389 | + rel->r_offset); |
| 7390 | |
| 7391 | value = abs (relocation); |
| 7392 | |
| 7393 | if (value >= 0x1000) |
| 7394 | return bfd_reloc_overflow; |
| 7395 | |
| 7396 | insn = (insn & 0xfb0f8f00) | (value & 0xff) |
| 7397 | | ((value & 0x700) << 4) |
| 7398 | | ((value & 0x800) << 15); |
| 7399 | if (relocation < 0) |
| 7400 | insn |= 0xa00000; |
| 7401 | |
| 7402 | bfd_put_16 (input_bfd, insn >> 16, hit_data); |
| 7403 | bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2); |
| 7404 | |
| 7405 | return bfd_reloc_ok; |
| 7406 | } |
| 7407 | |
| 7408 | case R_ARM_THM_PC8: |
| 7409 | /* PR 10073: This reloc is not generated by the GNU toolchain, |
| 7410 | but it is supported for compatibility with third party libraries |
| 7411 | generated by other compilers, specifically the ARM/IAR. */ |
| 7412 | { |
| 7413 | bfd_vma insn; |
| 7414 | bfd_signed_vma relocation; |
| 7415 | |
| 7416 | insn = bfd_get_16 (input_bfd, hit_data); |
| 7417 | |
| 7418 | if (globals->use_rel) |
| 7419 | addend = (insn & 0x00ff) << 2; |
| 7420 | |
| 7421 | relocation = value + addend; |
| 7422 | relocation -= (input_section->output_section->vma |
| 7423 | + input_section->output_offset |
| 7424 | + rel->r_offset); |
| 7425 | |
| 7426 | value = abs (relocation); |
| 7427 | |
| 7428 | /* We do not check for overflow of this reloc. Although strictly |
| 7429 | speaking this is incorrect, it appears to be necessary in order |
| 7430 | to work with IAR generated relocs. Since GCC and GAS do not |
| 7431 | generate R_ARM_THM_PC8 relocs, the lack of a check should not be |
| 7432 | a problem for them. */ |
| 7433 | value &= 0x3fc; |
| 7434 | |
| 7435 | insn = (insn & 0xff00) | (value >> 2); |
| 7436 | |
| 7437 | bfd_put_16 (input_bfd, insn, hit_data); |
| 7438 | |
| 7439 | return bfd_reloc_ok; |
| 7440 | } |
| 7441 | |
| 7442 | case R_ARM_THM_PC12: |
| 7443 | /* Corresponds to: ldr.w reg, [pc, #offset]. */ |
| 7444 | { |
| 7445 | bfd_vma insn; |
| 7446 | bfd_signed_vma relocation; |
| 7447 | |
| 7448 | insn = (bfd_get_16 (input_bfd, hit_data) << 16) |
| 7449 | | bfd_get_16 (input_bfd, hit_data + 2); |
| 7450 | |
| 7451 | if (globals->use_rel) |
| 7452 | { |
| 7453 | signed_addend = insn & 0xfff; |
| 7454 | if (!(insn & (1 << 23))) |
| 7455 | signed_addend = -signed_addend; |
| 7456 | } |
| 7457 | |
| 7458 | relocation = value + signed_addend; |
| 7459 | relocation -= (input_section->output_section->vma |
| 7460 | + input_section->output_offset |
| 7461 | + rel->r_offset); |
| 7462 | |
| 7463 | value = abs (relocation); |
| 7464 | |
| 7465 | if (value >= 0x1000) |
| 7466 | return bfd_reloc_overflow; |
| 7467 | |
| 7468 | insn = (insn & 0xff7ff000) | value; |
| 7469 | if (relocation >= 0) |
| 7470 | insn |= (1 << 23); |
| 7471 | |
| 7472 | bfd_put_16 (input_bfd, insn >> 16, hit_data); |
| 7473 | bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2); |
| 7474 | |
| 7475 | return bfd_reloc_ok; |
| 7476 | } |
| 7477 | |
| 7478 | case R_ARM_THM_XPC22: |
| 7479 | case R_ARM_THM_CALL: |
| 7480 | case R_ARM_THM_JUMP24: |
| 7481 | /* Thumb BL (branch long instruction). */ |
| 7482 | { |
| 7483 | bfd_vma relocation; |
| 7484 | bfd_vma reloc_sign; |
| 7485 | bfd_boolean overflow = FALSE; |
| 7486 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); |
| 7487 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); |
| 7488 | bfd_signed_vma reloc_signed_max; |
| 7489 | bfd_signed_vma reloc_signed_min; |
| 7490 | bfd_vma check; |
| 7491 | bfd_signed_vma signed_check; |
| 7492 | int bitsize; |
| 7493 | const int thumb2 = using_thumb2 (globals); |
| 7494 | |
| 7495 | /* A branch to an undefined weak symbol is turned into a jump to |
| 7496 | the next instruction unless a PLT entry will be created. |
| 7497 | The jump to the next instruction is optimized as a NOP.W for |
| 7498 | Thumb-2 enabled architectures. */ |
| 7499 | if (h && h->root.type == bfd_link_hash_undefweak |
| 7500 | && !(splt != NULL && h->plt.offset != (bfd_vma) -1)) |
| 7501 | { |
| 7502 | if (arch_has_thumb2_nop (globals)) |
| 7503 | { |
| 7504 | bfd_put_16 (input_bfd, 0xf3af, hit_data); |
| 7505 | bfd_put_16 (input_bfd, 0x8000, hit_data + 2); |
| 7506 | } |
| 7507 | else |
| 7508 | { |
| 7509 | bfd_put_16 (input_bfd, 0xe000, hit_data); |
| 7510 | bfd_put_16 (input_bfd, 0xbf00, hit_data + 2); |
| 7511 | } |
| 7512 | return bfd_reloc_ok; |
| 7513 | } |
| 7514 | |
| 7515 | /* Fetch the addend. We use the Thumb-2 encoding (backwards compatible |
| 7516 | with Thumb-1) involving the J1 and J2 bits. */ |
| 7517 | if (globals->use_rel) |
| 7518 | { |
| 7519 | bfd_vma s = (upper_insn & (1 << 10)) >> 10; |
| 7520 | bfd_vma upper = upper_insn & 0x3ff; |
| 7521 | bfd_vma lower = lower_insn & 0x7ff; |
| 7522 | bfd_vma j1 = (lower_insn & (1 << 13)) >> 13; |
| 7523 | bfd_vma j2 = (lower_insn & (1 << 11)) >> 11; |
| 7524 | bfd_vma i1 = j1 ^ s ? 0 : 1; |
| 7525 | bfd_vma i2 = j2 ^ s ? 0 : 1; |
| 7526 | |
| 7527 | addend = (i1 << 23) | (i2 << 22) | (upper << 12) | (lower << 1); |
| 7528 | /* Sign extend. */ |
| 7529 | addend = (addend | ((s ? 0 : 1) << 24)) - (1 << 24); |
| 7530 | |
| 7531 | signed_addend = addend; |
| 7532 | } |
| 7533 | |
| 7534 | if (r_type == R_ARM_THM_XPC22) |
| 7535 | { |
| 7536 | /* Check for Thumb to Thumb call. */ |
| 7537 | /* FIXME: Should we translate the instruction into a BL |
| 7538 | instruction instead ? */ |
| 7539 | if (sym_flags == STT_ARM_TFUNC) |
| 7540 | (*_bfd_error_handler) |
| 7541 | (_("%B: Warning: Thumb BLX instruction targets thumb function '%s'."), |
| 7542 | input_bfd, |
| 7543 | h ? h->root.root.string : "(local)"); |
| 7544 | } |
| 7545 | else |
| 7546 | { |
| 7547 | /* If it is not a call to Thumb, assume call to Arm. |
| 7548 | If it is a call relative to a section name, then it is not a |
| 7549 | function call at all, but rather a long jump. Calls through |
| 7550 | the PLT do not require stubs. */ |
| 7551 | if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION |
| 7552 | && (h == NULL || splt == NULL |
| 7553 | || h->plt.offset == (bfd_vma) -1)) |
| 7554 | { |
| 7555 | if (globals->use_blx && r_type == R_ARM_THM_CALL) |
| 7556 | { |
| 7557 | /* Convert BL to BLX. */ |
| 7558 | lower_insn = (lower_insn & ~0x1000) | 0x0800; |
| 7559 | } |
| 7560 | else if (( r_type != R_ARM_THM_CALL) |
| 7561 | && (r_type != R_ARM_THM_JUMP24)) |
| 7562 | { |
| 7563 | if (elf32_thumb_to_arm_stub |
| 7564 | (info, sym_name, input_bfd, output_bfd, input_section, |
| 7565 | hit_data, sym_sec, rel->r_offset, signed_addend, value, |
| 7566 | error_message)) |
| 7567 | return bfd_reloc_ok; |
| 7568 | else |
| 7569 | return bfd_reloc_dangerous; |
| 7570 | } |
| 7571 | } |
| 7572 | else if (sym_flags == STT_ARM_TFUNC && globals->use_blx |
| 7573 | && r_type == R_ARM_THM_CALL) |
| 7574 | { |
| 7575 | /* Make sure this is a BL. */ |
| 7576 | lower_insn |= 0x1800; |
| 7577 | } |
| 7578 | } |
| 7579 | |
| 7580 | enum elf32_arm_stub_type stub_type = arm_stub_none; |
| 7581 | if (r_type == R_ARM_THM_CALL || r_type == R_ARM_THM_JUMP24) |
| 7582 | { |
| 7583 | /* Check if a stub has to be inserted because the destination |
| 7584 | is too far. */ |
| 7585 | struct elf32_arm_stub_hash_entry *stub_entry; |
| 7586 | struct elf32_arm_link_hash_entry *hash; |
| 7587 | |
| 7588 | hash = (struct elf32_arm_link_hash_entry *) h; |
| 7589 | |
| 7590 | stub_type = arm_type_of_stub (info, input_section, rel, |
| 7591 | &sym_flags, hash, value, sym_sec, |
| 7592 | input_bfd, sym_name); |
| 7593 | |
| 7594 | if (stub_type != arm_stub_none) |
| 7595 | { |
| 7596 | /* The target is out of reach or we are changing modes, so |
| 7597 | redirect the branch to the local stub for this |
| 7598 | function. */ |
| 7599 | stub_entry = elf32_arm_get_stub_entry (input_section, |
| 7600 | sym_sec, h, |
| 7601 | rel, globals, |
| 7602 | stub_type); |
| 7603 | if (stub_entry != NULL) |
| 7604 | value = (stub_entry->stub_offset |
| 7605 | + stub_entry->stub_sec->output_offset |
| 7606 | + stub_entry->stub_sec->output_section->vma); |
| 7607 | |
| 7608 | /* If this call becomes a call to Arm, force BLX. */ |
| 7609 | if (globals->use_blx && (r_type == R_ARM_THM_CALL)) |
| 7610 | { |
| 7611 | if ((stub_entry |
| 7612 | && !arm_stub_is_thumb (stub_entry->stub_type)) |
| 7613 | || (sym_flags != STT_ARM_TFUNC)) |
| 7614 | lower_insn = (lower_insn & ~0x1000) | 0x0800; |
| 7615 | } |
| 7616 | } |
| 7617 | } |
| 7618 | |
| 7619 | /* Handle calls via the PLT. */ |
| 7620 | if (stub_type == arm_stub_none |
| 7621 | && h != NULL |
| 7622 | && splt != NULL |
| 7623 | && h->plt.offset != (bfd_vma) -1) |
| 7624 | { |
| 7625 | value = (splt->output_section->vma |
| 7626 | + splt->output_offset |
| 7627 | + h->plt.offset); |
| 7628 | |
| 7629 | if (globals->use_blx && r_type == R_ARM_THM_CALL) |
| 7630 | { |
| 7631 | /* If the Thumb BLX instruction is available, convert |
| 7632 | the BL to a BLX instruction to call the ARM-mode |
| 7633 | PLT entry. */ |
| 7634 | lower_insn = (lower_insn & ~0x1000) | 0x0800; |
| 7635 | sym_flags = STT_FUNC; |
| 7636 | } |
| 7637 | else |
| 7638 | { |
| 7639 | /* Target the Thumb stub before the ARM PLT entry. */ |
| 7640 | value -= PLT_THUMB_STUB_SIZE; |
| 7641 | sym_flags = STT_ARM_TFUNC; |
| 7642 | } |
| 7643 | *unresolved_reloc_p = FALSE; |
| 7644 | } |
| 7645 | |
| 7646 | relocation = value + signed_addend; |
| 7647 | |
| 7648 | relocation -= (input_section->output_section->vma |
| 7649 | + input_section->output_offset |
| 7650 | + rel->r_offset); |
| 7651 | |
| 7652 | check = relocation >> howto->rightshift; |
| 7653 | |
| 7654 | /* If this is a signed value, the rightshift just dropped |
| 7655 | leading 1 bits (assuming twos complement). */ |
| 7656 | if ((bfd_signed_vma) relocation >= 0) |
| 7657 | signed_check = check; |
| 7658 | else |
| 7659 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); |
| 7660 | |
| 7661 | /* Calculate the permissable maximum and minimum values for |
| 7662 | this relocation according to whether we're relocating for |
| 7663 | Thumb-2 or not. */ |
| 7664 | bitsize = howto->bitsize; |
| 7665 | if (!thumb2) |
| 7666 | bitsize -= 2; |
| 7667 | reloc_signed_max = (1 << (bitsize - 1)) - 1; |
| 7668 | reloc_signed_min = ~reloc_signed_max; |
| 7669 | |
| 7670 | /* Assumes two's complement. */ |
| 7671 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 7672 | overflow = TRUE; |
| 7673 | |
| 7674 | if ((lower_insn & 0x5000) == 0x4000) |
| 7675 | /* For a BLX instruction, make sure that the relocation is rounded up |
| 7676 | to a word boundary. This follows the semantics of the instruction |
| 7677 | which specifies that bit 1 of the target address will come from bit |
| 7678 | 1 of the base address. */ |
| 7679 | relocation = (relocation + 2) & ~ 3; |
| 7680 | |
| 7681 | /* Put RELOCATION back into the insn. Assumes two's complement. |
| 7682 | We use the Thumb-2 encoding, which is safe even if dealing with |
| 7683 | a Thumb-1 instruction by virtue of our overflow check above. */ |
| 7684 | reloc_sign = (signed_check < 0) ? 1 : 0; |
| 7685 | upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) |
| 7686 | | ((relocation >> 12) & 0x3ff) |
| 7687 | | (reloc_sign << 10); |
| 7688 | lower_insn = (lower_insn & ~(bfd_vma) 0x2fff) |
| 7689 | | (((!((relocation >> 23) & 1)) ^ reloc_sign) << 13) |
| 7690 | | (((!((relocation >> 22) & 1)) ^ reloc_sign) << 11) |
| 7691 | | ((relocation >> 1) & 0x7ff); |
| 7692 | |
| 7693 | /* Put the relocated value back in the object file: */ |
| 7694 | bfd_put_16 (input_bfd, upper_insn, hit_data); |
| 7695 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); |
| 7696 | |
| 7697 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); |
| 7698 | } |
| 7699 | break; |
| 7700 | |
| 7701 | case R_ARM_THM_JUMP19: |
| 7702 | /* Thumb32 conditional branch instruction. */ |
| 7703 | { |
| 7704 | bfd_vma relocation; |
| 7705 | bfd_boolean overflow = FALSE; |
| 7706 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); |
| 7707 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); |
| 7708 | bfd_signed_vma reloc_signed_max = 0xffffe; |
| 7709 | bfd_signed_vma reloc_signed_min = -0x100000; |
| 7710 | bfd_signed_vma signed_check; |
| 7711 | |
| 7712 | /* Need to refetch the addend, reconstruct the top three bits, |
| 7713 | and squish the two 11 bit pieces together. */ |
| 7714 | if (globals->use_rel) |
| 7715 | { |
| 7716 | bfd_vma S = (upper_insn & 0x0400) >> 10; |
| 7717 | bfd_vma upper = (upper_insn & 0x003f); |
| 7718 | bfd_vma J1 = (lower_insn & 0x2000) >> 13; |
| 7719 | bfd_vma J2 = (lower_insn & 0x0800) >> 11; |
| 7720 | bfd_vma lower = (lower_insn & 0x07ff); |
| 7721 | |
| 7722 | upper |= J1 << 6; |
| 7723 | upper |= J2 << 7; |
| 7724 | upper |= (!S) << 8; |
| 7725 | upper -= 0x0100; /* Sign extend. */ |
| 7726 | |
| 7727 | addend = (upper << 12) | (lower << 1); |
| 7728 | signed_addend = addend; |
| 7729 | } |
| 7730 | |
| 7731 | /* Handle calls via the PLT. */ |
| 7732 | if (h != NULL && splt != NULL && h->plt.offset != (bfd_vma) -1) |
| 7733 | { |
| 7734 | value = (splt->output_section->vma |
| 7735 | + splt->output_offset |
| 7736 | + h->plt.offset); |
| 7737 | /* Target the Thumb stub before the ARM PLT entry. */ |
| 7738 | value -= PLT_THUMB_STUB_SIZE; |
| 7739 | *unresolved_reloc_p = FALSE; |
| 7740 | } |
| 7741 | |
| 7742 | /* ??? Should handle interworking? GCC might someday try to |
| 7743 | use this for tail calls. */ |
| 7744 | |
| 7745 | relocation = value + signed_addend; |
| 7746 | relocation -= (input_section->output_section->vma |
| 7747 | + input_section->output_offset |
| 7748 | + rel->r_offset); |
| 7749 | signed_check = (bfd_signed_vma) relocation; |
| 7750 | |
| 7751 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 7752 | overflow = TRUE; |
| 7753 | |
| 7754 | /* Put RELOCATION back into the insn. */ |
| 7755 | { |
| 7756 | bfd_vma S = (relocation & 0x00100000) >> 20; |
| 7757 | bfd_vma J2 = (relocation & 0x00080000) >> 19; |
| 7758 | bfd_vma J1 = (relocation & 0x00040000) >> 18; |
| 7759 | bfd_vma hi = (relocation & 0x0003f000) >> 12; |
| 7760 | bfd_vma lo = (relocation & 0x00000ffe) >> 1; |
| 7761 | |
| 7762 | upper_insn = (upper_insn & 0xfbc0) | (S << 10) | hi; |
| 7763 | lower_insn = (lower_insn & 0xd000) | (J1 << 13) | (J2 << 11) | lo; |
| 7764 | } |
| 7765 | |
| 7766 | /* Put the relocated value back in the object file: */ |
| 7767 | bfd_put_16 (input_bfd, upper_insn, hit_data); |
| 7768 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); |
| 7769 | |
| 7770 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); |
| 7771 | } |
| 7772 | |
| 7773 | case R_ARM_THM_JUMP11: |
| 7774 | case R_ARM_THM_JUMP8: |
| 7775 | case R_ARM_THM_JUMP6: |
| 7776 | /* Thumb B (branch) instruction). */ |
| 7777 | { |
| 7778 | bfd_signed_vma relocation; |
| 7779 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; |
| 7780 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
| 7781 | bfd_signed_vma signed_check; |
| 7782 | |
| 7783 | /* CZB cannot jump backward. */ |
| 7784 | if (r_type == R_ARM_THM_JUMP6) |
| 7785 | reloc_signed_min = 0; |
| 7786 | |
| 7787 | if (globals->use_rel) |
| 7788 | { |
| 7789 | /* Need to refetch addend. */ |
| 7790 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; |
| 7791 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 7792 | { |
| 7793 | signed_addend = -1; |
| 7794 | signed_addend &= ~ howto->src_mask; |
| 7795 | signed_addend |= addend; |
| 7796 | } |
| 7797 | else |
| 7798 | signed_addend = addend; |
| 7799 | /* The value in the insn has been right shifted. We need to |
| 7800 | undo this, so that we can perform the address calculation |
| 7801 | in terms of bytes. */ |
| 7802 | signed_addend <<= howto->rightshift; |
| 7803 | } |
| 7804 | relocation = value + signed_addend; |
| 7805 | |
| 7806 | relocation -= (input_section->output_section->vma |
| 7807 | + input_section->output_offset |
| 7808 | + rel->r_offset); |
| 7809 | |
| 7810 | relocation >>= howto->rightshift; |
| 7811 | signed_check = relocation; |
| 7812 | |
| 7813 | if (r_type == R_ARM_THM_JUMP6) |
| 7814 | relocation = ((relocation & 0x0020) << 4) | ((relocation & 0x001f) << 3); |
| 7815 | else |
| 7816 | relocation &= howto->dst_mask; |
| 7817 | relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask)); |
| 7818 | |
| 7819 | bfd_put_16 (input_bfd, relocation, hit_data); |
| 7820 | |
| 7821 | /* Assumes two's complement. */ |
| 7822 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
| 7823 | return bfd_reloc_overflow; |
| 7824 | |
| 7825 | return bfd_reloc_ok; |
| 7826 | } |
| 7827 | |
| 7828 | case R_ARM_ALU_PCREL7_0: |
| 7829 | case R_ARM_ALU_PCREL15_8: |
| 7830 | case R_ARM_ALU_PCREL23_15: |
| 7831 | { |
| 7832 | bfd_vma insn; |
| 7833 | bfd_vma relocation; |
| 7834 | |
| 7835 | insn = bfd_get_32 (input_bfd, hit_data); |
| 7836 | if (globals->use_rel) |
| 7837 | { |
| 7838 | /* Extract the addend. */ |
| 7839 | addend = (insn & 0xff) << ((insn & 0xf00) >> 7); |
| 7840 | signed_addend = addend; |
| 7841 | } |
| 7842 | relocation = value + signed_addend; |
| 7843 | |
| 7844 | relocation -= (input_section->output_section->vma |
| 7845 | + input_section->output_offset |
| 7846 | + rel->r_offset); |
| 7847 | insn = (insn & ~0xfff) |
| 7848 | | ((howto->bitpos << 7) & 0xf00) |
| 7849 | | ((relocation >> howto->bitpos) & 0xff); |
| 7850 | bfd_put_32 (input_bfd, value, hit_data); |
| 7851 | } |
| 7852 | return bfd_reloc_ok; |
| 7853 | |
| 7854 | case R_ARM_GNU_VTINHERIT: |
| 7855 | case R_ARM_GNU_VTENTRY: |
| 7856 | return bfd_reloc_ok; |
| 7857 | |
| 7858 | case R_ARM_GOTOFF32: |
| 7859 | /* Relocation is relative to the start of the |
| 7860 | global offset table. */ |
| 7861 | |
| 7862 | BFD_ASSERT (sgot != NULL); |
| 7863 | if (sgot == NULL) |
| 7864 | return bfd_reloc_notsupported; |
| 7865 | |
| 7866 | /* If we are addressing a Thumb function, we need to adjust the |
| 7867 | address by one, so that attempts to call the function pointer will |
| 7868 | correctly interpret it as Thumb code. */ |
| 7869 | if (sym_flags == STT_ARM_TFUNC) |
| 7870 | value += 1; |
| 7871 | |
| 7872 | /* Note that sgot->output_offset is not involved in this |
| 7873 | calculation. We always want the start of .got. If we |
| 7874 | define _GLOBAL_OFFSET_TABLE in a different way, as is |
| 7875 | permitted by the ABI, we might have to change this |
| 7876 | calculation. */ |
| 7877 | value -= sgot->output_section->vma; |
| 7878 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 7879 | contents, rel->r_offset, value, |
| 7880 | rel->r_addend); |
| 7881 | |
| 7882 | case R_ARM_GOTPC: |
| 7883 | /* Use global offset table as symbol value. */ |
| 7884 | BFD_ASSERT (sgot != NULL); |
| 7885 | |
| 7886 | if (sgot == NULL) |
| 7887 | return bfd_reloc_notsupported; |
| 7888 | |
| 7889 | *unresolved_reloc_p = FALSE; |
| 7890 | value = sgot->output_section->vma; |
| 7891 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 7892 | contents, rel->r_offset, value, |
| 7893 | rel->r_addend); |
| 7894 | |
| 7895 | case R_ARM_GOT32: |
| 7896 | case R_ARM_GOT_PREL: |
| 7897 | /* Relocation is to the entry for this symbol in the |
| 7898 | global offset table. */ |
| 7899 | if (sgot == NULL) |
| 7900 | return bfd_reloc_notsupported; |
| 7901 | |
| 7902 | if (h != NULL) |
| 7903 | { |
| 7904 | bfd_vma off; |
| 7905 | bfd_boolean dyn; |
| 7906 | |
| 7907 | off = h->got.offset; |
| 7908 | BFD_ASSERT (off != (bfd_vma) -1); |
| 7909 | dyn = globals->root.dynamic_sections_created; |
| 7910 | |
| 7911 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 7912 | || (info->shared |
| 7913 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 7914 | || (ELF_ST_VISIBILITY (h->other) |
| 7915 | && h->root.type == bfd_link_hash_undefweak)) |
| 7916 | { |
| 7917 | /* This is actually a static link, or it is a -Bsymbolic link |
| 7918 | and the symbol is defined locally. We must initialize this |
| 7919 | entry in the global offset table. Since the offset must |
| 7920 | always be a multiple of 4, we use the least significant bit |
| 7921 | to record whether we have initialized it already. |
| 7922 | |
| 7923 | When doing a dynamic link, we create a .rel(a).got relocation |
| 7924 | entry to initialize the value. This is done in the |
| 7925 | finish_dynamic_symbol routine. */ |
| 7926 | if ((off & 1) != 0) |
| 7927 | off &= ~1; |
| 7928 | else |
| 7929 | { |
| 7930 | /* If we are addressing a Thumb function, we need to |
| 7931 | adjust the address by one, so that attempts to |
| 7932 | call the function pointer will correctly |
| 7933 | interpret it as Thumb code. */ |
| 7934 | if (sym_flags == STT_ARM_TFUNC) |
| 7935 | value |= 1; |
| 7936 | |
| 7937 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
| 7938 | h->got.offset |= 1; |
| 7939 | } |
| 7940 | } |
| 7941 | else |
| 7942 | *unresolved_reloc_p = FALSE; |
| 7943 | |
| 7944 | value = sgot->output_offset + off; |
| 7945 | } |
| 7946 | else |
| 7947 | { |
| 7948 | bfd_vma off; |
| 7949 | |
| 7950 | BFD_ASSERT (local_got_offsets != NULL && |
| 7951 | local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 7952 | |
| 7953 | off = local_got_offsets[r_symndx]; |
| 7954 | |
| 7955 | /* The offset must always be a multiple of 4. We use the |
| 7956 | least significant bit to record whether we have already |
| 7957 | generated the necessary reloc. */ |
| 7958 | if ((off & 1) != 0) |
| 7959 | off &= ~1; |
| 7960 | else |
| 7961 | { |
| 7962 | /* If we are addressing a Thumb function, we need to |
| 7963 | adjust the address by one, so that attempts to |
| 7964 | call the function pointer will correctly |
| 7965 | interpret it as Thumb code. */ |
| 7966 | if (sym_flags == STT_ARM_TFUNC) |
| 7967 | value |= 1; |
| 7968 | |
| 7969 | if (globals->use_rel) |
| 7970 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
| 7971 | |
| 7972 | if (info->shared) |
| 7973 | { |
| 7974 | asection * srelgot; |
| 7975 | Elf_Internal_Rela outrel; |
| 7976 | bfd_byte *loc; |
| 7977 | |
| 7978 | srelgot = (bfd_get_section_by_name |
| 7979 | (dynobj, RELOC_SECTION (globals, ".got"))); |
| 7980 | BFD_ASSERT (srelgot != NULL); |
| 7981 | |
| 7982 | outrel.r_addend = addend + value; |
| 7983 | outrel.r_offset = (sgot->output_section->vma |
| 7984 | + sgot->output_offset |
| 7985 | + off); |
| 7986 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); |
| 7987 | loc = srelgot->contents; |
| 7988 | loc += srelgot->reloc_count++ * RELOC_SIZE (globals); |
| 7989 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 7990 | } |
| 7991 | |
| 7992 | local_got_offsets[r_symndx] |= 1; |
| 7993 | } |
| 7994 | |
| 7995 | value = sgot->output_offset + off; |
| 7996 | } |
| 7997 | if (r_type != R_ARM_GOT32) |
| 7998 | value += sgot->output_section->vma; |
| 7999 | |
| 8000 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 8001 | contents, rel->r_offset, value, |
| 8002 | rel->r_addend); |
| 8003 | |
| 8004 | case R_ARM_TLS_LDO32: |
| 8005 | value = value - dtpoff_base (info); |
| 8006 | |
| 8007 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 8008 | contents, rel->r_offset, value, |
| 8009 | rel->r_addend); |
| 8010 | |
| 8011 | case R_ARM_TLS_LDM32: |
| 8012 | { |
| 8013 | bfd_vma off; |
| 8014 | |
| 8015 | if (globals->sgot == NULL) |
| 8016 | abort (); |
| 8017 | |
| 8018 | off = globals->tls_ldm_got.offset; |
| 8019 | |
| 8020 | if ((off & 1) != 0) |
| 8021 | off &= ~1; |
| 8022 | else |
| 8023 | { |
| 8024 | /* If we don't know the module number, create a relocation |
| 8025 | for it. */ |
| 8026 | if (info->shared) |
| 8027 | { |
| 8028 | Elf_Internal_Rela outrel; |
| 8029 | bfd_byte *loc; |
| 8030 | |
| 8031 | if (globals->srelgot == NULL) |
| 8032 | abort (); |
| 8033 | |
| 8034 | outrel.r_addend = 0; |
| 8035 | outrel.r_offset = (globals->sgot->output_section->vma |
| 8036 | + globals->sgot->output_offset + off); |
| 8037 | outrel.r_info = ELF32_R_INFO (0, R_ARM_TLS_DTPMOD32); |
| 8038 | |
| 8039 | if (globals->use_rel) |
| 8040 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 8041 | globals->sgot->contents + off); |
| 8042 | |
| 8043 | loc = globals->srelgot->contents; |
| 8044 | loc += globals->srelgot->reloc_count++ * RELOC_SIZE (globals); |
| 8045 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 8046 | } |
| 8047 | else |
| 8048 | bfd_put_32 (output_bfd, 1, globals->sgot->contents + off); |
| 8049 | |
| 8050 | globals->tls_ldm_got.offset |= 1; |
| 8051 | } |
| 8052 | |
| 8053 | value = globals->sgot->output_section->vma + globals->sgot->output_offset + off |
| 8054 | - (input_section->output_section->vma + input_section->output_offset + rel->r_offset); |
| 8055 | |
| 8056 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 8057 | contents, rel->r_offset, value, |
| 8058 | rel->r_addend); |
| 8059 | } |
| 8060 | |
| 8061 | case R_ARM_TLS_GD32: |
| 8062 | case R_ARM_TLS_IE32: |
| 8063 | { |
| 8064 | bfd_vma off; |
| 8065 | int indx; |
| 8066 | char tls_type; |
| 8067 | |
| 8068 | if (globals->sgot == NULL) |
| 8069 | abort (); |
| 8070 | |
| 8071 | indx = 0; |
| 8072 | if (h != NULL) |
| 8073 | { |
| 8074 | bfd_boolean dyn; |
| 8075 | dyn = globals->root.dynamic_sections_created; |
| 8076 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 8077 | && (!info->shared |
| 8078 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 8079 | { |
| 8080 | *unresolved_reloc_p = FALSE; |
| 8081 | indx = h->dynindx; |
| 8082 | } |
| 8083 | off = h->got.offset; |
| 8084 | tls_type = ((struct elf32_arm_link_hash_entry *) h)->tls_type; |
| 8085 | } |
| 8086 | else |
| 8087 | { |
| 8088 | if (local_got_offsets == NULL) |
| 8089 | abort (); |
| 8090 | off = local_got_offsets[r_symndx]; |
| 8091 | tls_type = elf32_arm_local_got_tls_type (input_bfd)[r_symndx]; |
| 8092 | } |
| 8093 | |
| 8094 | if (tls_type == GOT_UNKNOWN) |
| 8095 | abort (); |
| 8096 | |
| 8097 | if ((off & 1) != 0) |
| 8098 | off &= ~1; |
| 8099 | else |
| 8100 | { |
| 8101 | bfd_boolean need_relocs = FALSE; |
| 8102 | Elf_Internal_Rela outrel; |
| 8103 | bfd_byte *loc = NULL; |
| 8104 | int cur_off = off; |
| 8105 | |
| 8106 | /* The GOT entries have not been initialized yet. Do it |
| 8107 | now, and emit any relocations. If both an IE GOT and a |
| 8108 | GD GOT are necessary, we emit the GD first. */ |
| 8109 | |
| 8110 | if ((info->shared || indx != 0) |
| 8111 | && (h == NULL |
| 8112 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 8113 | || h->root.type != bfd_link_hash_undefweak)) |
| 8114 | { |
| 8115 | need_relocs = TRUE; |
| 8116 | if (globals->srelgot == NULL) |
| 8117 | abort (); |
| 8118 | loc = globals->srelgot->contents; |
| 8119 | loc += globals->srelgot->reloc_count * RELOC_SIZE (globals); |
| 8120 | } |
| 8121 | |
| 8122 | if (tls_type & GOT_TLS_GD) |
| 8123 | { |
| 8124 | if (need_relocs) |
| 8125 | { |
| 8126 | outrel.r_addend = 0; |
| 8127 | outrel.r_offset = (globals->sgot->output_section->vma |
| 8128 | + globals->sgot->output_offset |
| 8129 | + cur_off); |
| 8130 | outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_DTPMOD32); |
| 8131 | |
| 8132 | if (globals->use_rel) |
| 8133 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 8134 | globals->sgot->contents + cur_off); |
| 8135 | |
| 8136 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 8137 | globals->srelgot->reloc_count++; |
| 8138 | loc += RELOC_SIZE (globals); |
| 8139 | |
| 8140 | if (indx == 0) |
| 8141 | bfd_put_32 (output_bfd, value - dtpoff_base (info), |
| 8142 | globals->sgot->contents + cur_off + 4); |
| 8143 | else |
| 8144 | { |
| 8145 | outrel.r_addend = 0; |
| 8146 | outrel.r_info = ELF32_R_INFO (indx, |
| 8147 | R_ARM_TLS_DTPOFF32); |
| 8148 | outrel.r_offset += 4; |
| 8149 | |
| 8150 | if (globals->use_rel) |
| 8151 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 8152 | globals->sgot->contents + cur_off + 4); |
| 8153 | |
| 8154 | |
| 8155 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 8156 | globals->srelgot->reloc_count++; |
| 8157 | loc += RELOC_SIZE (globals); |
| 8158 | } |
| 8159 | } |
| 8160 | else |
| 8161 | { |
| 8162 | /* If we are not emitting relocations for a |
| 8163 | general dynamic reference, then we must be in a |
| 8164 | static link or an executable link with the |
| 8165 | symbol binding locally. Mark it as belonging |
| 8166 | to module 1, the executable. */ |
| 8167 | bfd_put_32 (output_bfd, 1, |
| 8168 | globals->sgot->contents + cur_off); |
| 8169 | bfd_put_32 (output_bfd, value - dtpoff_base (info), |
| 8170 | globals->sgot->contents + cur_off + 4); |
| 8171 | } |
| 8172 | |
| 8173 | cur_off += 8; |
| 8174 | } |
| 8175 | |
| 8176 | if (tls_type & GOT_TLS_IE) |
| 8177 | { |
| 8178 | if (need_relocs) |
| 8179 | { |
| 8180 | if (indx == 0) |
| 8181 | outrel.r_addend = value - dtpoff_base (info); |
| 8182 | else |
| 8183 | outrel.r_addend = 0; |
| 8184 | outrel.r_offset = (globals->sgot->output_section->vma |
| 8185 | + globals->sgot->output_offset |
| 8186 | + cur_off); |
| 8187 | outrel.r_info = ELF32_R_INFO (indx, R_ARM_TLS_TPOFF32); |
| 8188 | |
| 8189 | if (globals->use_rel) |
| 8190 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 8191 | globals->sgot->contents + cur_off); |
| 8192 | |
| 8193 | SWAP_RELOC_OUT (globals) (output_bfd, &outrel, loc); |
| 8194 | globals->srelgot->reloc_count++; |
| 8195 | loc += RELOC_SIZE (globals); |
| 8196 | } |
| 8197 | else |
| 8198 | bfd_put_32 (output_bfd, tpoff (info, value), |
| 8199 | globals->sgot->contents + cur_off); |
| 8200 | cur_off += 4; |
| 8201 | } |
| 8202 | |
| 8203 | if (h != NULL) |
| 8204 | h->got.offset |= 1; |
| 8205 | else |
| 8206 | local_got_offsets[r_symndx] |= 1; |
| 8207 | } |
| 8208 | |
| 8209 | if ((tls_type & GOT_TLS_GD) && r_type != R_ARM_TLS_GD32) |
| 8210 | off += 8; |
| 8211 | value = globals->sgot->output_section->vma + globals->sgot->output_offset + off |
| 8212 | - (input_section->output_section->vma + input_section->output_offset + rel->r_offset); |
| 8213 | |
| 8214 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 8215 | contents, rel->r_offset, value, |
| 8216 | rel->r_addend); |
| 8217 | } |
| 8218 | |
| 8219 | case R_ARM_TLS_LE32: |
| 8220 | if (info->shared) |
| 8221 | { |
| 8222 | (*_bfd_error_handler) |
| 8223 | (_("%B(%A+0x%lx): R_ARM_TLS_LE32 relocation not permitted in shared object"), |
| 8224 | input_bfd, input_section, |
| 8225 | (long) rel->r_offset, howto->name); |
| 8226 | return (bfd_reloc_status_type) FALSE; |
| 8227 | } |
| 8228 | else |
| 8229 | value = tpoff (info, value); |
| 8230 | |
| 8231 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 8232 | contents, rel->r_offset, value, |
| 8233 | rel->r_addend); |
| 8234 | |
| 8235 | case R_ARM_V4BX: |
| 8236 | if (globals->fix_v4bx) |
| 8237 | { |
| 8238 | bfd_vma insn = bfd_get_32 (input_bfd, hit_data); |
| 8239 | |
| 8240 | /* Ensure that we have a BX instruction. */ |
| 8241 | BFD_ASSERT ((insn & 0x0ffffff0) == 0x012fff10); |
| 8242 | |
| 8243 | if (globals->fix_v4bx == 2 && (insn & 0xf) != 0xf) |
| 8244 | { |
| 8245 | /* Branch to veneer. */ |
| 8246 | bfd_vma glue_addr; |
| 8247 | glue_addr = elf32_arm_bx_glue (info, insn & 0xf); |
| 8248 | glue_addr -= input_section->output_section->vma |
| 8249 | + input_section->output_offset |
| 8250 | + rel->r_offset + 8; |
| 8251 | insn = (insn & 0xf0000000) | 0x0a000000 |
| 8252 | | ((glue_addr >> 2) & 0x00ffffff); |
| 8253 | } |
| 8254 | else |
| 8255 | { |
| 8256 | /* Preserve Rm (lowest four bits) and the condition code |
| 8257 | (highest four bits). Other bits encode MOV PC,Rm. */ |
| 8258 | insn = (insn & 0xf000000f) | 0x01a0f000; |
| 8259 | } |
| 8260 | |
| 8261 | bfd_put_32 (input_bfd, insn, hit_data); |
| 8262 | } |
| 8263 | return bfd_reloc_ok; |
| 8264 | |
| 8265 | case R_ARM_MOVW_ABS_NC: |
| 8266 | case R_ARM_MOVT_ABS: |
| 8267 | case R_ARM_MOVW_PREL_NC: |
| 8268 | case R_ARM_MOVT_PREL: |
| 8269 | /* Until we properly support segment-base-relative addressing then |
| 8270 | we assume the segment base to be zero, as for the group relocations. |
| 8271 | Thus R_ARM_MOVW_BREL_NC has the same semantics as R_ARM_MOVW_ABS_NC |
| 8272 | and R_ARM_MOVT_BREL has the same semantics as R_ARM_MOVT_ABS. */ |
| 8273 | case R_ARM_MOVW_BREL_NC: |
| 8274 | case R_ARM_MOVW_BREL: |
| 8275 | case R_ARM_MOVT_BREL: |
| 8276 | { |
| 8277 | bfd_vma insn = bfd_get_32 (input_bfd, hit_data); |
| 8278 | |
| 8279 | if (globals->use_rel) |
| 8280 | { |
| 8281 | addend = ((insn >> 4) & 0xf000) | (insn & 0xfff); |
| 8282 | signed_addend = (addend ^ 0x8000) - 0x8000; |
| 8283 | } |
| 8284 | |
| 8285 | value += signed_addend; |
| 8286 | |
| 8287 | if (r_type == R_ARM_MOVW_PREL_NC || r_type == R_ARM_MOVT_PREL) |
| 8288 | value -= (input_section->output_section->vma |
| 8289 | + input_section->output_offset + rel->r_offset); |
| 8290 | |
| 8291 | if (r_type == R_ARM_MOVW_BREL && value >= 0x10000) |
| 8292 | return bfd_reloc_overflow; |
| 8293 | |
| 8294 | if (sym_flags == STT_ARM_TFUNC) |
| 8295 | value |= 1; |
| 8296 | |
| 8297 | if (r_type == R_ARM_MOVT_ABS || r_type == R_ARM_MOVT_PREL |
| 8298 | || r_type == R_ARM_MOVT_BREL) |
| 8299 | value >>= 16; |
| 8300 | |
| 8301 | insn &= 0xfff0f000; |
| 8302 | insn |= value & 0xfff; |
| 8303 | insn |= (value & 0xf000) << 4; |
| 8304 | bfd_put_32 (input_bfd, insn, hit_data); |
| 8305 | } |
| 8306 | return bfd_reloc_ok; |
| 8307 | |
| 8308 | case R_ARM_THM_MOVW_ABS_NC: |
| 8309 | case R_ARM_THM_MOVT_ABS: |
| 8310 | case R_ARM_THM_MOVW_PREL_NC: |
| 8311 | case R_ARM_THM_MOVT_PREL: |
| 8312 | /* Until we properly support segment-base-relative addressing then |
| 8313 | we assume the segment base to be zero, as for the above relocations. |
| 8314 | Thus R_ARM_THM_MOVW_BREL_NC has the same semantics as |
| 8315 | R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_BREL has the same semantics |
| 8316 | as R_ARM_THM_MOVT_ABS. */ |
| 8317 | case R_ARM_THM_MOVW_BREL_NC: |
| 8318 | case R_ARM_THM_MOVW_BREL: |
| 8319 | case R_ARM_THM_MOVT_BREL: |
| 8320 | { |
| 8321 | bfd_vma insn; |
| 8322 | |
| 8323 | insn = bfd_get_16 (input_bfd, hit_data) << 16; |
| 8324 | insn |= bfd_get_16 (input_bfd, hit_data + 2); |
| 8325 | |
| 8326 | if (globals->use_rel) |
| 8327 | { |
| 8328 | addend = ((insn >> 4) & 0xf000) |
| 8329 | | ((insn >> 15) & 0x0800) |
| 8330 | | ((insn >> 4) & 0x0700) |
| 8331 | | (insn & 0x00ff); |
| 8332 | signed_addend = (addend ^ 0x8000) - 0x8000; |
| 8333 | } |
| 8334 | |
| 8335 | value += signed_addend; |
| 8336 | |
| 8337 | if (r_type == R_ARM_THM_MOVW_PREL_NC || r_type == R_ARM_THM_MOVT_PREL) |
| 8338 | value -= (input_section->output_section->vma |
| 8339 | + input_section->output_offset + rel->r_offset); |
| 8340 | |
| 8341 | if (r_type == R_ARM_THM_MOVW_BREL && value >= 0x10000) |
| 8342 | return bfd_reloc_overflow; |
| 8343 | |
| 8344 | if (sym_flags == STT_ARM_TFUNC) |
| 8345 | value |= 1; |
| 8346 | |
| 8347 | if (r_type == R_ARM_THM_MOVT_ABS || r_type == R_ARM_THM_MOVT_PREL |
| 8348 | || r_type == R_ARM_THM_MOVT_BREL) |
| 8349 | value >>= 16; |
| 8350 | |
| 8351 | insn &= 0xfbf08f00; |
| 8352 | insn |= (value & 0xf000) << 4; |
| 8353 | insn |= (value & 0x0800) << 15; |
| 8354 | insn |= (value & 0x0700) << 4; |
| 8355 | insn |= (value & 0x00ff); |
| 8356 | |
| 8357 | bfd_put_16 (input_bfd, insn >> 16, hit_data); |
| 8358 | bfd_put_16 (input_bfd, insn & 0xffff, hit_data + 2); |
| 8359 | } |
| 8360 | return bfd_reloc_ok; |
| 8361 | |
| 8362 | case R_ARM_ALU_PC_G0_NC: |
| 8363 | case R_ARM_ALU_PC_G1_NC: |
| 8364 | case R_ARM_ALU_PC_G0: |
| 8365 | case R_ARM_ALU_PC_G1: |
| 8366 | case R_ARM_ALU_PC_G2: |
| 8367 | case R_ARM_ALU_SB_G0_NC: |
| 8368 | case R_ARM_ALU_SB_G1_NC: |
| 8369 | case R_ARM_ALU_SB_G0: |
| 8370 | case R_ARM_ALU_SB_G1: |
| 8371 | case R_ARM_ALU_SB_G2: |
| 8372 | { |
| 8373 | bfd_vma insn = bfd_get_32 (input_bfd, hit_data); |
| 8374 | bfd_vma pc = input_section->output_section->vma |
| 8375 | + input_section->output_offset + rel->r_offset; |
| 8376 | /* sb should be the origin of the *segment* containing the symbol. |
| 8377 | It is not clear how to obtain this OS-dependent value, so we |
| 8378 | make an arbitrary choice of zero. */ |
| 8379 | bfd_vma sb = 0; |
| 8380 | bfd_vma residual; |
| 8381 | bfd_vma g_n; |
| 8382 | bfd_signed_vma signed_value; |
| 8383 | int group = 0; |
| 8384 | |
| 8385 | /* Determine which group of bits to select. */ |
| 8386 | switch (r_type) |
| 8387 | { |
| 8388 | case R_ARM_ALU_PC_G0_NC: |
| 8389 | case R_ARM_ALU_PC_G0: |
| 8390 | case R_ARM_ALU_SB_G0_NC: |
| 8391 | case R_ARM_ALU_SB_G0: |
| 8392 | group = 0; |
| 8393 | break; |
| 8394 | |
| 8395 | case R_ARM_ALU_PC_G1_NC: |
| 8396 | case R_ARM_ALU_PC_G1: |
| 8397 | case R_ARM_ALU_SB_G1_NC: |
| 8398 | case R_ARM_ALU_SB_G1: |
| 8399 | group = 1; |
| 8400 | break; |
| 8401 | |
| 8402 | case R_ARM_ALU_PC_G2: |
| 8403 | case R_ARM_ALU_SB_G2: |
| 8404 | group = 2; |
| 8405 | break; |
| 8406 | |
| 8407 | default: |
| 8408 | abort (); |
| 8409 | } |
| 8410 | |
| 8411 | /* If REL, extract the addend from the insn. If RELA, it will |
| 8412 | have already been fetched for us. */ |
| 8413 | if (globals->use_rel) |
| 8414 | { |
| 8415 | int negative; |
| 8416 | bfd_vma constant = insn & 0xff; |
| 8417 | bfd_vma rotation = (insn & 0xf00) >> 8; |
| 8418 | |
| 8419 | if (rotation == 0) |
| 8420 | signed_addend = constant; |
| 8421 | else |
| 8422 | { |
| 8423 | /* Compensate for the fact that in the instruction, the |
| 8424 | rotation is stored in multiples of 2 bits. */ |
| 8425 | rotation *= 2; |
| 8426 | |
| 8427 | /* Rotate "constant" right by "rotation" bits. */ |
| 8428 | signed_addend = (constant >> rotation) | |
| 8429 | (constant << (8 * sizeof (bfd_vma) - rotation)); |
| 8430 | } |
| 8431 | |
| 8432 | /* Determine if the instruction is an ADD or a SUB. |
| 8433 | (For REL, this determines the sign of the addend.) */ |
| 8434 | negative = identify_add_or_sub (insn); |
| 8435 | if (negative == 0) |
| 8436 | { |
| 8437 | (*_bfd_error_handler) |
| 8438 | (_("%B(%A+0x%lx): Only ADD or SUB instructions are allowed for ALU group relocations"), |
| 8439 | input_bfd, input_section, |
| 8440 | (long) rel->r_offset, howto->name); |
| 8441 | return bfd_reloc_overflow; |
| 8442 | } |
| 8443 | |
| 8444 | signed_addend *= negative; |
| 8445 | } |
| 8446 | |
| 8447 | /* Compute the value (X) to go in the place. */ |
| 8448 | if (r_type == R_ARM_ALU_PC_G0_NC |
| 8449 | || r_type == R_ARM_ALU_PC_G1_NC |
| 8450 | || r_type == R_ARM_ALU_PC_G0 |
| 8451 | || r_type == R_ARM_ALU_PC_G1 |
| 8452 | || r_type == R_ARM_ALU_PC_G2) |
| 8453 | /* PC relative. */ |
| 8454 | signed_value = value - pc + signed_addend; |
| 8455 | else |
| 8456 | /* Section base relative. */ |
| 8457 | signed_value = value - sb + signed_addend; |
| 8458 | |
| 8459 | /* If the target symbol is a Thumb function, then set the |
| 8460 | Thumb bit in the address. */ |
| 8461 | if (sym_flags == STT_ARM_TFUNC) |
| 8462 | signed_value |= 1; |
| 8463 | |
| 8464 | /* Calculate the value of the relevant G_n, in encoded |
| 8465 | constant-with-rotation format. */ |
| 8466 | g_n = calculate_group_reloc_mask (abs (signed_value), group, |
| 8467 | &residual); |
| 8468 | |
| 8469 | /* Check for overflow if required. */ |
| 8470 | if ((r_type == R_ARM_ALU_PC_G0 |
| 8471 | || r_type == R_ARM_ALU_PC_G1 |
| 8472 | || r_type == R_ARM_ALU_PC_G2 |
| 8473 | || r_type == R_ARM_ALU_SB_G0 |
| 8474 | || r_type == R_ARM_ALU_SB_G1 |
| 8475 | || r_type == R_ARM_ALU_SB_G2) && residual != 0) |
| 8476 | { |
| 8477 | (*_bfd_error_handler) |
| 8478 | (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"), |
| 8479 | input_bfd, input_section, |
| 8480 | (long) rel->r_offset, abs (signed_value), howto->name); |
| 8481 | return bfd_reloc_overflow; |
| 8482 | } |
| 8483 | |
| 8484 | /* Mask out the value and the ADD/SUB part of the opcode; take care |
| 8485 | not to destroy the S bit. */ |
| 8486 | insn &= 0xff1ff000; |
| 8487 | |
| 8488 | /* Set the opcode according to whether the value to go in the |
| 8489 | place is negative. */ |
| 8490 | if (signed_value < 0) |
| 8491 | insn |= 1 << 22; |
| 8492 | else |
| 8493 | insn |= 1 << 23; |
| 8494 | |
| 8495 | /* Encode the offset. */ |
| 8496 | insn |= g_n; |
| 8497 | |
| 8498 | bfd_put_32 (input_bfd, insn, hit_data); |
| 8499 | } |
| 8500 | return bfd_reloc_ok; |
| 8501 | |
| 8502 | case R_ARM_LDR_PC_G0: |
| 8503 | case R_ARM_LDR_PC_G1: |
| 8504 | case R_ARM_LDR_PC_G2: |
| 8505 | case R_ARM_LDR_SB_G0: |
| 8506 | case R_ARM_LDR_SB_G1: |
| 8507 | case R_ARM_LDR_SB_G2: |
| 8508 | { |
| 8509 | bfd_vma insn = bfd_get_32 (input_bfd, hit_data); |
| 8510 | bfd_vma pc = input_section->output_section->vma |
| 8511 | + input_section->output_offset + rel->r_offset; |
| 8512 | bfd_vma sb = 0; /* See note above. */ |
| 8513 | bfd_vma residual; |
| 8514 | bfd_signed_vma signed_value; |
| 8515 | int group = 0; |
| 8516 | |
| 8517 | /* Determine which groups of bits to calculate. */ |
| 8518 | switch (r_type) |
| 8519 | { |
| 8520 | case R_ARM_LDR_PC_G0: |
| 8521 | case R_ARM_LDR_SB_G0: |
| 8522 | group = 0; |
| 8523 | break; |
| 8524 | |
| 8525 | case R_ARM_LDR_PC_G1: |
| 8526 | case R_ARM_LDR_SB_G1: |
| 8527 | group = 1; |
| 8528 | break; |
| 8529 | |
| 8530 | case R_ARM_LDR_PC_G2: |
| 8531 | case R_ARM_LDR_SB_G2: |
| 8532 | group = 2; |
| 8533 | break; |
| 8534 | |
| 8535 | default: |
| 8536 | abort (); |
| 8537 | } |
| 8538 | |
| 8539 | /* If REL, extract the addend from the insn. If RELA, it will |
| 8540 | have already been fetched for us. */ |
| 8541 | if (globals->use_rel) |
| 8542 | { |
| 8543 | int negative = (insn & (1 << 23)) ? 1 : -1; |
| 8544 | signed_addend = negative * (insn & 0xfff); |
| 8545 | } |
| 8546 | |
| 8547 | /* Compute the value (X) to go in the place. */ |
| 8548 | if (r_type == R_ARM_LDR_PC_G0 |
| 8549 | || r_type == R_ARM_LDR_PC_G1 |
| 8550 | || r_type == R_ARM_LDR_PC_G2) |
| 8551 | /* PC relative. */ |
| 8552 | signed_value = value - pc + signed_addend; |
| 8553 | else |
| 8554 | /* Section base relative. */ |
| 8555 | signed_value = value - sb + signed_addend; |
| 8556 | |
| 8557 | /* Calculate the value of the relevant G_{n-1} to obtain |
| 8558 | the residual at that stage. */ |
| 8559 | calculate_group_reloc_mask (abs (signed_value), group - 1, &residual); |
| 8560 | |
| 8561 | /* Check for overflow. */ |
| 8562 | if (residual >= 0x1000) |
| 8563 | { |
| 8564 | (*_bfd_error_handler) |
| 8565 | (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"), |
| 8566 | input_bfd, input_section, |
| 8567 | (long) rel->r_offset, abs (signed_value), howto->name); |
| 8568 | return bfd_reloc_overflow; |
| 8569 | } |
| 8570 | |
| 8571 | /* Mask out the value and U bit. */ |
| 8572 | insn &= 0xff7ff000; |
| 8573 | |
| 8574 | /* Set the U bit if the value to go in the place is non-negative. */ |
| 8575 | if (signed_value >= 0) |
| 8576 | insn |= 1 << 23; |
| 8577 | |
| 8578 | /* Encode the offset. */ |
| 8579 | insn |= residual; |
| 8580 | |
| 8581 | bfd_put_32 (input_bfd, insn, hit_data); |
| 8582 | } |
| 8583 | return bfd_reloc_ok; |
| 8584 | |
| 8585 | case R_ARM_LDRS_PC_G0: |
| 8586 | case R_ARM_LDRS_PC_G1: |
| 8587 | case R_ARM_LDRS_PC_G2: |
| 8588 | case R_ARM_LDRS_SB_G0: |
| 8589 | case R_ARM_LDRS_SB_G1: |
| 8590 | case R_ARM_LDRS_SB_G2: |
| 8591 | { |
| 8592 | bfd_vma insn = bfd_get_32 (input_bfd, hit_data); |
| 8593 | bfd_vma pc = input_section->output_section->vma |
| 8594 | + input_section->output_offset + rel->r_offset; |
| 8595 | bfd_vma sb = 0; /* See note above. */ |
| 8596 | bfd_vma residual; |
| 8597 | bfd_signed_vma signed_value; |
| 8598 | int group = 0; |
| 8599 | |
| 8600 | /* Determine which groups of bits to calculate. */ |
| 8601 | switch (r_type) |
| 8602 | { |
| 8603 | case R_ARM_LDRS_PC_G0: |
| 8604 | case R_ARM_LDRS_SB_G0: |
| 8605 | group = 0; |
| 8606 | break; |
| 8607 | |
| 8608 | case R_ARM_LDRS_PC_G1: |
| 8609 | case R_ARM_LDRS_SB_G1: |
| 8610 | group = 1; |
| 8611 | break; |
| 8612 | |
| 8613 | case R_ARM_LDRS_PC_G2: |
| 8614 | case R_ARM_LDRS_SB_G2: |
| 8615 | group = 2; |
| 8616 | break; |
| 8617 | |
| 8618 | default: |
| 8619 | abort (); |
| 8620 | } |
| 8621 | |
| 8622 | /* If REL, extract the addend from the insn. If RELA, it will |
| 8623 | have already been fetched for us. */ |
| 8624 | if (globals->use_rel) |
| 8625 | { |
| 8626 | int negative = (insn & (1 << 23)) ? 1 : -1; |
| 8627 | signed_addend = negative * (((insn & 0xf00) >> 4) + (insn & 0xf)); |
| 8628 | } |
| 8629 | |
| 8630 | /* Compute the value (X) to go in the place. */ |
| 8631 | if (r_type == R_ARM_LDRS_PC_G0 |
| 8632 | || r_type == R_ARM_LDRS_PC_G1 |
| 8633 | || r_type == R_ARM_LDRS_PC_G2) |
| 8634 | /* PC relative. */ |
| 8635 | signed_value = value - pc + signed_addend; |
| 8636 | else |
| 8637 | /* Section base relative. */ |
| 8638 | signed_value = value - sb + signed_addend; |
| 8639 | |
| 8640 | /* Calculate the value of the relevant G_{n-1} to obtain |
| 8641 | the residual at that stage. */ |
| 8642 | calculate_group_reloc_mask (abs (signed_value), group - 1, &residual); |
| 8643 | |
| 8644 | /* Check for overflow. */ |
| 8645 | if (residual >= 0x100) |
| 8646 | { |
| 8647 | (*_bfd_error_handler) |
| 8648 | (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"), |
| 8649 | input_bfd, input_section, |
| 8650 | (long) rel->r_offset, abs (signed_value), howto->name); |
| 8651 | return bfd_reloc_overflow; |
| 8652 | } |
| 8653 | |
| 8654 | /* Mask out the value and U bit. */ |
| 8655 | insn &= 0xff7ff0f0; |
| 8656 | |
| 8657 | /* Set the U bit if the value to go in the place is non-negative. */ |
| 8658 | if (signed_value >= 0) |
| 8659 | insn |= 1 << 23; |
| 8660 | |
| 8661 | /* Encode the offset. */ |
| 8662 | insn |= ((residual & 0xf0) << 4) | (residual & 0xf); |
| 8663 | |
| 8664 | bfd_put_32 (input_bfd, insn, hit_data); |
| 8665 | } |
| 8666 | return bfd_reloc_ok; |
| 8667 | |
| 8668 | case R_ARM_LDC_PC_G0: |
| 8669 | case R_ARM_LDC_PC_G1: |
| 8670 | case R_ARM_LDC_PC_G2: |
| 8671 | case R_ARM_LDC_SB_G0: |
| 8672 | case R_ARM_LDC_SB_G1: |
| 8673 | case R_ARM_LDC_SB_G2: |
| 8674 | { |
| 8675 | bfd_vma insn = bfd_get_32 (input_bfd, hit_data); |
| 8676 | bfd_vma pc = input_section->output_section->vma |
| 8677 | + input_section->output_offset + rel->r_offset; |
| 8678 | bfd_vma sb = 0; /* See note above. */ |
| 8679 | bfd_vma residual; |
| 8680 | bfd_signed_vma signed_value; |
| 8681 | int group = 0; |
| 8682 | |
| 8683 | /* Determine which groups of bits to calculate. */ |
| 8684 | switch (r_type) |
| 8685 | { |
| 8686 | case R_ARM_LDC_PC_G0: |
| 8687 | case R_ARM_LDC_SB_G0: |
| 8688 | group = 0; |
| 8689 | break; |
| 8690 | |
| 8691 | case R_ARM_LDC_PC_G1: |
| 8692 | case R_ARM_LDC_SB_G1: |
| 8693 | group = 1; |
| 8694 | break; |
| 8695 | |
| 8696 | case R_ARM_LDC_PC_G2: |
| 8697 | case R_ARM_LDC_SB_G2: |
| 8698 | group = 2; |
| 8699 | break; |
| 8700 | |
| 8701 | default: |
| 8702 | abort (); |
| 8703 | } |
| 8704 | |
| 8705 | /* If REL, extract the addend from the insn. If RELA, it will |
| 8706 | have already been fetched for us. */ |
| 8707 | if (globals->use_rel) |
| 8708 | { |
| 8709 | int negative = (insn & (1 << 23)) ? 1 : -1; |
| 8710 | signed_addend = negative * ((insn & 0xff) << 2); |
| 8711 | } |
| 8712 | |
| 8713 | /* Compute the value (X) to go in the place. */ |
| 8714 | if (r_type == R_ARM_LDC_PC_G0 |
| 8715 | || r_type == R_ARM_LDC_PC_G1 |
| 8716 | || r_type == R_ARM_LDC_PC_G2) |
| 8717 | /* PC relative. */ |
| 8718 | signed_value = value - pc + signed_addend; |
| 8719 | else |
| 8720 | /* Section base relative. */ |
| 8721 | signed_value = value - sb + signed_addend; |
| 8722 | |
| 8723 | /* Calculate the value of the relevant G_{n-1} to obtain |
| 8724 | the residual at that stage. */ |
| 8725 | calculate_group_reloc_mask (abs (signed_value), group - 1, &residual); |
| 8726 | |
| 8727 | /* Check for overflow. (The absolute value to go in the place must be |
| 8728 | divisible by four and, after having been divided by four, must |
| 8729 | fit in eight bits.) */ |
| 8730 | if ((residual & 0x3) != 0 || residual >= 0x400) |
| 8731 | { |
| 8732 | (*_bfd_error_handler) |
| 8733 | (_("%B(%A+0x%lx): Overflow whilst splitting 0x%lx for group relocation %s"), |
| 8734 | input_bfd, input_section, |
| 8735 | (long) rel->r_offset, abs (signed_value), howto->name); |
| 8736 | return bfd_reloc_overflow; |
| 8737 | } |
| 8738 | |
| 8739 | /* Mask out the value and U bit. */ |
| 8740 | insn &= 0xff7fff00; |
| 8741 | |
| 8742 | /* Set the U bit if the value to go in the place is non-negative. */ |
| 8743 | if (signed_value >= 0) |
| 8744 | insn |= 1 << 23; |
| 8745 | |
| 8746 | /* Encode the offset. */ |
| 8747 | insn |= residual >> 2; |
| 8748 | |
| 8749 | bfd_put_32 (input_bfd, insn, hit_data); |
| 8750 | } |
| 8751 | return bfd_reloc_ok; |
| 8752 | |
| 8753 | default: |
| 8754 | return bfd_reloc_notsupported; |
| 8755 | } |
| 8756 | } |
| 8757 | |
| 8758 | /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */ |
| 8759 | static void |
| 8760 | arm_add_to_rel (bfd * abfd, |
| 8761 | bfd_byte * address, |
| 8762 | reloc_howto_type * howto, |
| 8763 | bfd_signed_vma increment) |
| 8764 | { |
| 8765 | bfd_signed_vma addend; |
| 8766 | |
| 8767 | if (howto->type == R_ARM_THM_CALL |
| 8768 | || howto->type == R_ARM_THM_JUMP24) |
| 8769 | { |
| 8770 | int upper_insn, lower_insn; |
| 8771 | int upper, lower; |
| 8772 | |
| 8773 | upper_insn = bfd_get_16 (abfd, address); |
| 8774 | lower_insn = bfd_get_16 (abfd, address + 2); |
| 8775 | upper = upper_insn & 0x7ff; |
| 8776 | lower = lower_insn & 0x7ff; |
| 8777 | |
| 8778 | addend = (upper << 12) | (lower << 1); |
| 8779 | addend += increment; |
| 8780 | addend >>= 1; |
| 8781 | |
| 8782 | upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff); |
| 8783 | lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff); |
| 8784 | |
| 8785 | bfd_put_16 (abfd, (bfd_vma) upper_insn, address); |
| 8786 | bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2); |
| 8787 | } |
| 8788 | else |
| 8789 | { |
| 8790 | bfd_vma contents; |
| 8791 | |
| 8792 | contents = bfd_get_32 (abfd, address); |
| 8793 | |
| 8794 | /* Get the (signed) value from the instruction. */ |
| 8795 | addend = contents & howto->src_mask; |
| 8796 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 8797 | { |
| 8798 | bfd_signed_vma mask; |
| 8799 | |
| 8800 | mask = -1; |
| 8801 | mask &= ~ howto->src_mask; |
| 8802 | addend |= mask; |
| 8803 | } |
| 8804 | |
| 8805 | /* Add in the increment, (which is a byte value). */ |
| 8806 | switch (howto->type) |
| 8807 | { |
| 8808 | default: |
| 8809 | addend += increment; |
| 8810 | break; |
| 8811 | |
| 8812 | case R_ARM_PC24: |
| 8813 | case R_ARM_PLT32: |
| 8814 | case R_ARM_CALL: |
| 8815 | case R_ARM_JUMP24: |
| 8816 | addend <<= howto->size; |
| 8817 | addend += increment; |
| 8818 | |
| 8819 | /* Should we check for overflow here ? */ |
| 8820 | |
| 8821 | /* Drop any undesired bits. */ |
| 8822 | addend >>= howto->rightshift; |
| 8823 | break; |
| 8824 | } |
| 8825 | |
| 8826 | contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask); |
| 8827 | |
| 8828 | bfd_put_32 (abfd, contents, address); |
| 8829 | } |
| 8830 | } |
| 8831 | |
| 8832 | #define IS_ARM_TLS_RELOC(R_TYPE) \ |
| 8833 | ((R_TYPE) == R_ARM_TLS_GD32 \ |
| 8834 | || (R_TYPE) == R_ARM_TLS_LDO32 \ |
| 8835 | || (R_TYPE) == R_ARM_TLS_LDM32 \ |
| 8836 | || (R_TYPE) == R_ARM_TLS_DTPOFF32 \ |
| 8837 | || (R_TYPE) == R_ARM_TLS_DTPMOD32 \ |
| 8838 | || (R_TYPE) == R_ARM_TLS_TPOFF32 \ |
| 8839 | || (R_TYPE) == R_ARM_TLS_LE32 \ |
| 8840 | || (R_TYPE) == R_ARM_TLS_IE32) |
| 8841 | |
| 8842 | /* Relocate an ARM ELF section. */ |
| 8843 | |
| 8844 | static bfd_boolean |
| 8845 | elf32_arm_relocate_section (bfd * output_bfd, |
| 8846 | struct bfd_link_info * info, |
| 8847 | bfd * input_bfd, |
| 8848 | asection * input_section, |
| 8849 | bfd_byte * contents, |
| 8850 | Elf_Internal_Rela * relocs, |
| 8851 | Elf_Internal_Sym * local_syms, |
| 8852 | asection ** local_sections) |
| 8853 | { |
| 8854 | Elf_Internal_Shdr *symtab_hdr; |
| 8855 | struct elf_link_hash_entry **sym_hashes; |
| 8856 | Elf_Internal_Rela *rel; |
| 8857 | Elf_Internal_Rela *relend; |
| 8858 | const char *name; |
| 8859 | struct elf32_arm_link_hash_table * globals; |
| 8860 | |
| 8861 | globals = elf32_arm_hash_table (info); |
| 8862 | if (globals == NULL) |
| 8863 | return FALSE; |
| 8864 | |
| 8865 | symtab_hdr = & elf_symtab_hdr (input_bfd); |
| 8866 | sym_hashes = elf_sym_hashes (input_bfd); |
| 8867 | |
| 8868 | rel = relocs; |
| 8869 | relend = relocs + input_section->reloc_count; |
| 8870 | for (; rel < relend; rel++) |
| 8871 | { |
| 8872 | int r_type; |
| 8873 | reloc_howto_type * howto; |
| 8874 | unsigned long r_symndx; |
| 8875 | Elf_Internal_Sym * sym; |
| 8876 | asection * sec; |
| 8877 | struct elf_link_hash_entry * h; |
| 8878 | bfd_vma relocation; |
| 8879 | bfd_reloc_status_type r; |
| 8880 | arelent bfd_reloc; |
| 8881 | char sym_type; |
| 8882 | bfd_boolean unresolved_reloc = FALSE; |
| 8883 | char *error_message = NULL; |
| 8884 | |
| 8885 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 8886 | r_type = ELF32_R_TYPE (rel->r_info); |
| 8887 | r_type = arm_real_reloc_type (globals, r_type); |
| 8888 | |
| 8889 | if ( r_type == R_ARM_GNU_VTENTRY |
| 8890 | || r_type == R_ARM_GNU_VTINHERIT) |
| 8891 | continue; |
| 8892 | |
| 8893 | bfd_reloc.howto = elf32_arm_howto_from_type (r_type); |
| 8894 | howto = bfd_reloc.howto; |
| 8895 | |
| 8896 | h = NULL; |
| 8897 | sym = NULL; |
| 8898 | sec = NULL; |
| 8899 | |
| 8900 | if (r_symndx < symtab_hdr->sh_info) |
| 8901 | { |
| 8902 | sym = local_syms + r_symndx; |
| 8903 | sym_type = ELF32_ST_TYPE (sym->st_info); |
| 8904 | sec = local_sections[r_symndx]; |
| 8905 | |
| 8906 | /* An object file might have a reference to a local |
| 8907 | undefined symbol. This is a daft object file, but we |
| 8908 | should at least do something about it. V4BX & NONE |
| 8909 | relocations do not use the symbol and are explicitly |
| 8910 | allowed to use the undefined symbol, so allow those. |
| 8911 | Likewise for relocations against STN_UNDEF. */ |
| 8912 | if (r_type != R_ARM_V4BX |
| 8913 | && r_type != R_ARM_NONE |
| 8914 | && r_symndx != STN_UNDEF |
| 8915 | && bfd_is_und_section (sec) |
| 8916 | && ELF_ST_BIND (sym->st_info) != STB_WEAK) |
| 8917 | { |
| 8918 | if (!info->callbacks->undefined_symbol |
| 8919 | (info, bfd_elf_string_from_elf_section |
| 8920 | (input_bfd, symtab_hdr->sh_link, sym->st_name), |
| 8921 | input_bfd, input_section, |
| 8922 | rel->r_offset, TRUE)) |
| 8923 | return FALSE; |
| 8924 | } |
| 8925 | |
| 8926 | if (globals->use_rel) |
| 8927 | { |
| 8928 | relocation = (sec->output_section->vma |
| 8929 | + sec->output_offset |
| 8930 | + sym->st_value); |
| 8931 | if (!info->relocatable |
| 8932 | && (sec->flags & SEC_MERGE) |
| 8933 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 8934 | { |
| 8935 | asection *msec; |
| 8936 | bfd_vma addend, value; |
| 8937 | |
| 8938 | switch (r_type) |
| 8939 | { |
| 8940 | case R_ARM_MOVW_ABS_NC: |
| 8941 | case R_ARM_MOVT_ABS: |
| 8942 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 8943 | addend = ((value & 0xf0000) >> 4) | (value & 0xfff); |
| 8944 | addend = (addend ^ 0x8000) - 0x8000; |
| 8945 | break; |
| 8946 | |
| 8947 | case R_ARM_THM_MOVW_ABS_NC: |
| 8948 | case R_ARM_THM_MOVT_ABS: |
| 8949 | value = bfd_get_16 (input_bfd, contents + rel->r_offset) |
| 8950 | << 16; |
| 8951 | value |= bfd_get_16 (input_bfd, |
| 8952 | contents + rel->r_offset + 2); |
| 8953 | addend = ((value & 0xf7000) >> 4) | (value & 0xff) |
| 8954 | | ((value & 0x04000000) >> 15); |
| 8955 | addend = (addend ^ 0x8000) - 0x8000; |
| 8956 | break; |
| 8957 | |
| 8958 | default: |
| 8959 | if (howto->rightshift |
| 8960 | || (howto->src_mask & (howto->src_mask + 1))) |
| 8961 | { |
| 8962 | (*_bfd_error_handler) |
| 8963 | (_("%B(%A+0x%lx): %s relocation against SEC_MERGE section"), |
| 8964 | input_bfd, input_section, |
| 8965 | (long) rel->r_offset, howto->name); |
| 8966 | return FALSE; |
| 8967 | } |
| 8968 | |
| 8969 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 8970 | |
| 8971 | /* Get the (signed) value from the instruction. */ |
| 8972 | addend = value & howto->src_mask; |
| 8973 | if (addend & ((howto->src_mask + 1) >> 1)) |
| 8974 | { |
| 8975 | bfd_signed_vma mask; |
| 8976 | |
| 8977 | mask = -1; |
| 8978 | mask &= ~ howto->src_mask; |
| 8979 | addend |= mask; |
| 8980 | } |
| 8981 | break; |
| 8982 | } |
| 8983 | |
| 8984 | msec = sec; |
| 8985 | addend = |
| 8986 | _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) |
| 8987 | - relocation; |
| 8988 | addend += msec->output_section->vma + msec->output_offset; |
| 8989 | |
| 8990 | /* Cases here must match those in the preceeding |
| 8991 | switch statement. */ |
| 8992 | switch (r_type) |
| 8993 | { |
| 8994 | case R_ARM_MOVW_ABS_NC: |
| 8995 | case R_ARM_MOVT_ABS: |
| 8996 | value = (value & 0xfff0f000) | ((addend & 0xf000) << 4) |
| 8997 | | (addend & 0xfff); |
| 8998 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| 8999 | break; |
| 9000 | |
| 9001 | case R_ARM_THM_MOVW_ABS_NC: |
| 9002 | case R_ARM_THM_MOVT_ABS: |
| 9003 | value = (value & 0xfbf08f00) | ((addend & 0xf700) << 4) |
| 9004 | | (addend & 0xff) | ((addend & 0x0800) << 15); |
| 9005 | bfd_put_16 (input_bfd, value >> 16, |
| 9006 | contents + rel->r_offset); |
| 9007 | bfd_put_16 (input_bfd, value, |
| 9008 | contents + rel->r_offset + 2); |
| 9009 | break; |
| 9010 | |
| 9011 | default: |
| 9012 | value = (value & ~ howto->dst_mask) |
| 9013 | | (addend & howto->dst_mask); |
| 9014 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); |
| 9015 | break; |
| 9016 | } |
| 9017 | } |
| 9018 | } |
| 9019 | else |
| 9020 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 9021 | } |
| 9022 | else |
| 9023 | { |
| 9024 | bfd_boolean warned; |
| 9025 | |
| 9026 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 9027 | r_symndx, symtab_hdr, sym_hashes, |
| 9028 | h, sec, relocation, |
| 9029 | unresolved_reloc, warned); |
| 9030 | |
| 9031 | sym_type = h->type; |
| 9032 | } |
| 9033 | |
| 9034 | if (sec != NULL && elf_discarded_section (sec)) |
| 9035 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 9036 | rel, relend, howto, contents); |
| 9037 | |
| 9038 | if (info->relocatable) |
| 9039 | { |
| 9040 | /* This is a relocatable link. We don't have to change |
| 9041 | anything, unless the reloc is against a section symbol, |
| 9042 | in which case we have to adjust according to where the |
| 9043 | section symbol winds up in the output section. */ |
| 9044 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 9045 | { |
| 9046 | if (globals->use_rel) |
| 9047 | arm_add_to_rel (input_bfd, contents + rel->r_offset, |
| 9048 | howto, (bfd_signed_vma) sec->output_offset); |
| 9049 | else |
| 9050 | rel->r_addend += sec->output_offset; |
| 9051 | } |
| 9052 | continue; |
| 9053 | } |
| 9054 | |
| 9055 | if (h != NULL) |
| 9056 | name = h->root.root.string; |
| 9057 | else |
| 9058 | { |
| 9059 | name = (bfd_elf_string_from_elf_section |
| 9060 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 9061 | if (name == NULL || *name == '\0') |
| 9062 | name = bfd_section_name (input_bfd, sec); |
| 9063 | } |
| 9064 | |
| 9065 | if (r_symndx != STN_UNDEF |
| 9066 | && r_type != R_ARM_NONE |
| 9067 | && (h == NULL |
| 9068 | || h->root.type == bfd_link_hash_defined |
| 9069 | || h->root.type == bfd_link_hash_defweak) |
| 9070 | && IS_ARM_TLS_RELOC (r_type) != (sym_type == STT_TLS)) |
| 9071 | { |
| 9072 | (*_bfd_error_handler) |
| 9073 | ((sym_type == STT_TLS |
| 9074 | ? _("%B(%A+0x%lx): %s used with TLS symbol %s") |
| 9075 | : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")), |
| 9076 | input_bfd, |
| 9077 | input_section, |
| 9078 | (long) rel->r_offset, |
| 9079 | howto->name, |
| 9080 | name); |
| 9081 | } |
| 9082 | |
| 9083 | r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, |
| 9084 | input_section, contents, rel, |
| 9085 | relocation, info, sec, name, |
| 9086 | (h ? ELF_ST_TYPE (h->type) : |
| 9087 | ELF_ST_TYPE (sym->st_info)), h, |
| 9088 | &unresolved_reloc, &error_message); |
| 9089 | |
| 9090 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| 9091 | because such sections are not SEC_ALLOC and thus ld.so will |
| 9092 | not process them. */ |
| 9093 | if (unresolved_reloc |
| 9094 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
| 9095 | && h->def_dynamic)) |
| 9096 | { |
| 9097 | (*_bfd_error_handler) |
| 9098 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| 9099 | input_bfd, |
| 9100 | input_section, |
| 9101 | (long) rel->r_offset, |
| 9102 | howto->name, |
| 9103 | h->root.root.string); |
| 9104 | return FALSE; |
| 9105 | } |
| 9106 | |
| 9107 | if (r != bfd_reloc_ok) |
| 9108 | { |
| 9109 | switch (r) |
| 9110 | { |
| 9111 | case bfd_reloc_overflow: |
| 9112 | /* If the overflowing reloc was to an undefined symbol, |
| 9113 | we have already printed one error message and there |
| 9114 | is no point complaining again. */ |
| 9115 | if ((! h || |
| 9116 | h->root.type != bfd_link_hash_undefined) |
| 9117 | && (!((*info->callbacks->reloc_overflow) |
| 9118 | (info, (h ? &h->root : NULL), name, howto->name, |
| 9119 | (bfd_vma) 0, input_bfd, input_section, |
| 9120 | rel->r_offset)))) |
| 9121 | return FALSE; |
| 9122 | break; |
| 9123 | |
| 9124 | case bfd_reloc_undefined: |
| 9125 | if (!((*info->callbacks->undefined_symbol) |
| 9126 | (info, name, input_bfd, input_section, |
| 9127 | rel->r_offset, TRUE))) |
| 9128 | return FALSE; |
| 9129 | break; |
| 9130 | |
| 9131 | case bfd_reloc_outofrange: |
| 9132 | error_message = _("out of range"); |
| 9133 | goto common_error; |
| 9134 | |
| 9135 | case bfd_reloc_notsupported: |
| 9136 | error_message = _("unsupported relocation"); |
| 9137 | goto common_error; |
| 9138 | |
| 9139 | case bfd_reloc_dangerous: |
| 9140 | /* error_message should already be set. */ |
| 9141 | goto common_error; |
| 9142 | |
| 9143 | default: |
| 9144 | error_message = _("unknown error"); |
| 9145 | /* Fall through. */ |
| 9146 | |
| 9147 | common_error: |
| 9148 | BFD_ASSERT (error_message != NULL); |
| 9149 | if (!((*info->callbacks->reloc_dangerous) |
| 9150 | (info, error_message, input_bfd, input_section, |
| 9151 | rel->r_offset))) |
| 9152 | return FALSE; |
| 9153 | break; |
| 9154 | } |
| 9155 | } |
| 9156 | } |
| 9157 | |
| 9158 | return TRUE; |
| 9159 | } |
| 9160 | |
| 9161 | /* Add a new unwind edit to the list described by HEAD, TAIL. If TINDEX is zero, |
| 9162 | adds the edit to the start of the list. (The list must be built in order of |
| 9163 | ascending TINDEX: the function's callers are primarily responsible for |
| 9164 | maintaining that condition). */ |
| 9165 | |
| 9166 | static void |
| 9167 | add_unwind_table_edit (arm_unwind_table_edit **head, |
| 9168 | arm_unwind_table_edit **tail, |
| 9169 | arm_unwind_edit_type type, |
| 9170 | asection *linked_section, |
| 9171 | unsigned int tindex) |
| 9172 | { |
| 9173 | arm_unwind_table_edit *new_edit = (arm_unwind_table_edit *) |
| 9174 | xmalloc (sizeof (arm_unwind_table_edit)); |
| 9175 | |
| 9176 | new_edit->type = type; |
| 9177 | new_edit->linked_section = linked_section; |
| 9178 | new_edit->index = tindex; |
| 9179 | |
| 9180 | if (tindex > 0) |
| 9181 | { |
| 9182 | new_edit->next = NULL; |
| 9183 | |
| 9184 | if (*tail) |
| 9185 | (*tail)->next = new_edit; |
| 9186 | |
| 9187 | (*tail) = new_edit; |
| 9188 | |
| 9189 | if (!*head) |
| 9190 | (*head) = new_edit; |
| 9191 | } |
| 9192 | else |
| 9193 | { |
| 9194 | new_edit->next = *head; |
| 9195 | |
| 9196 | if (!*tail) |
| 9197 | *tail = new_edit; |
| 9198 | |
| 9199 | *head = new_edit; |
| 9200 | } |
| 9201 | } |
| 9202 | |
| 9203 | static _arm_elf_section_data *get_arm_elf_section_data (asection *); |
| 9204 | |
| 9205 | /* Increase the size of EXIDX_SEC by ADJUST bytes. ADJUST mau be negative. */ |
| 9206 | static void |
| 9207 | adjust_exidx_size(asection *exidx_sec, int adjust) |
| 9208 | { |
| 9209 | asection *out_sec; |
| 9210 | |
| 9211 | if (!exidx_sec->rawsize) |
| 9212 | exidx_sec->rawsize = exidx_sec->size; |
| 9213 | |
| 9214 | bfd_set_section_size (exidx_sec->owner, exidx_sec, exidx_sec->size + adjust); |
| 9215 | out_sec = exidx_sec->output_section; |
| 9216 | /* Adjust size of output section. */ |
| 9217 | bfd_set_section_size (out_sec->owner, out_sec, out_sec->size +adjust); |
| 9218 | } |
| 9219 | |
| 9220 | /* Insert an EXIDX_CANTUNWIND marker at the end of a section. */ |
| 9221 | static void |
| 9222 | insert_cantunwind_after(asection *text_sec, asection *exidx_sec) |
| 9223 | { |
| 9224 | struct _arm_elf_section_data *exidx_arm_data; |
| 9225 | |
| 9226 | exidx_arm_data = get_arm_elf_section_data (exidx_sec); |
| 9227 | add_unwind_table_edit ( |
| 9228 | &exidx_arm_data->u.exidx.unwind_edit_list, |
| 9229 | &exidx_arm_data->u.exidx.unwind_edit_tail, |
| 9230 | INSERT_EXIDX_CANTUNWIND_AT_END, text_sec, UINT_MAX); |
| 9231 | |
| 9232 | adjust_exidx_size(exidx_sec, 8); |
| 9233 | } |
| 9234 | |
| 9235 | /* Scan .ARM.exidx tables, and create a list describing edits which should be |
| 9236 | made to those tables, such that: |
| 9237 | |
| 9238 | 1. Regions without unwind data are marked with EXIDX_CANTUNWIND entries. |
| 9239 | 2. Duplicate entries are merged together (EXIDX_CANTUNWIND, or unwind |
| 9240 | codes which have been inlined into the index). |
| 9241 | |
| 9242 | If MERGE_EXIDX_ENTRIES is false, duplicate entries are not merged. |
| 9243 | |
| 9244 | The edits are applied when the tables are written |
| 9245 | (in elf32_arm_write_section). |
| 9246 | */ |
| 9247 | |
| 9248 | bfd_boolean |
| 9249 | elf32_arm_fix_exidx_coverage (asection **text_section_order, |
| 9250 | unsigned int num_text_sections, |
| 9251 | struct bfd_link_info *info, |
| 9252 | bfd_boolean merge_exidx_entries) |
| 9253 | { |
| 9254 | bfd *inp; |
| 9255 | unsigned int last_second_word = 0, i; |
| 9256 | asection *last_exidx_sec = NULL; |
| 9257 | asection *last_text_sec = NULL; |
| 9258 | int last_unwind_type = -1; |
| 9259 | |
| 9260 | /* Walk over all EXIDX sections, and create backlinks from the corrsponding |
| 9261 | text sections. */ |
| 9262 | for (inp = info->input_bfds; inp != NULL; inp = inp->link_next) |
| 9263 | { |
| 9264 | asection *sec; |
| 9265 | |
| 9266 | for (sec = inp->sections; sec != NULL; sec = sec->next) |
| 9267 | { |
| 9268 | struct bfd_elf_section_data *elf_sec = elf_section_data (sec); |
| 9269 | Elf_Internal_Shdr *hdr = &elf_sec->this_hdr; |
| 9270 | |
| 9271 | if (!hdr || hdr->sh_type != SHT_ARM_EXIDX) |
| 9272 | continue; |
| 9273 | |
| 9274 | if (elf_sec->linked_to) |
| 9275 | { |
| 9276 | Elf_Internal_Shdr *linked_hdr |
| 9277 | = &elf_section_data (elf_sec->linked_to)->this_hdr; |
| 9278 | struct _arm_elf_section_data *linked_sec_arm_data |
| 9279 | = get_arm_elf_section_data (linked_hdr->bfd_section); |
| 9280 | |
| 9281 | if (linked_sec_arm_data == NULL) |
| 9282 | continue; |
| 9283 | |
| 9284 | /* Link this .ARM.exidx section back from the text section it |
| 9285 | describes. */ |
| 9286 | linked_sec_arm_data->u.text.arm_exidx_sec = sec; |
| 9287 | } |
| 9288 | } |
| 9289 | } |
| 9290 | |
| 9291 | /* Walk all text sections in order of increasing VMA. Eilminate duplicate |
| 9292 | index table entries (EXIDX_CANTUNWIND and inlined unwind opcodes), |
| 9293 | and add EXIDX_CANTUNWIND entries for sections with no unwind table data. */ |
| 9294 | |
| 9295 | for (i = 0; i < num_text_sections; i++) |
| 9296 | { |
| 9297 | asection *sec = text_section_order[i]; |
| 9298 | asection *exidx_sec; |
| 9299 | struct _arm_elf_section_data *arm_data = get_arm_elf_section_data (sec); |
| 9300 | struct _arm_elf_section_data *exidx_arm_data; |
| 9301 | bfd_byte *contents = NULL; |
| 9302 | int deleted_exidx_bytes = 0; |
| 9303 | bfd_vma j; |
| 9304 | arm_unwind_table_edit *unwind_edit_head = NULL; |
| 9305 | arm_unwind_table_edit *unwind_edit_tail = NULL; |
| 9306 | Elf_Internal_Shdr *hdr; |
| 9307 | bfd *ibfd; |
| 9308 | |
| 9309 | if (arm_data == NULL) |
| 9310 | continue; |
| 9311 | |
| 9312 | exidx_sec = arm_data->u.text.arm_exidx_sec; |
| 9313 | if (exidx_sec == NULL) |
| 9314 | { |
| 9315 | /* Section has no unwind data. */ |
| 9316 | if (last_unwind_type == 0 || !last_exidx_sec) |
| 9317 | continue; |
| 9318 | |
| 9319 | /* Ignore zero sized sections. */ |
| 9320 | if (sec->size == 0) |
| 9321 | continue; |
| 9322 | |
| 9323 | insert_cantunwind_after(last_text_sec, last_exidx_sec); |
| 9324 | last_unwind_type = 0; |
| 9325 | continue; |
| 9326 | } |
| 9327 | |
| 9328 | /* Skip /DISCARD/ sections. */ |
| 9329 | if (bfd_is_abs_section (exidx_sec->output_section)) |
| 9330 | continue; |
| 9331 | |
| 9332 | hdr = &elf_section_data (exidx_sec)->this_hdr; |
| 9333 | if (hdr->sh_type != SHT_ARM_EXIDX) |
| 9334 | continue; |
| 9335 | |
| 9336 | exidx_arm_data = get_arm_elf_section_data (exidx_sec); |
| 9337 | if (exidx_arm_data == NULL) |
| 9338 | continue; |
| 9339 | |
| 9340 | ibfd = exidx_sec->owner; |
| 9341 | |
| 9342 | if (hdr->contents != NULL) |
| 9343 | contents = hdr->contents; |
| 9344 | else if (! bfd_malloc_and_get_section (ibfd, exidx_sec, &contents)) |
| 9345 | /* An error? */ |
| 9346 | continue; |
| 9347 | |
| 9348 | for (j = 0; j < hdr->sh_size; j += 8) |
| 9349 | { |
| 9350 | unsigned int second_word = bfd_get_32 (ibfd, contents + j + 4); |
| 9351 | int unwind_type; |
| 9352 | int elide = 0; |
| 9353 | |
| 9354 | /* An EXIDX_CANTUNWIND entry. */ |
| 9355 | if (second_word == 1) |
| 9356 | { |
| 9357 | if (last_unwind_type == 0) |
| 9358 | elide = 1; |
| 9359 | unwind_type = 0; |
| 9360 | } |
| 9361 | /* Inlined unwinding data. Merge if equal to previous. */ |
| 9362 | else if ((second_word & 0x80000000) != 0) |
| 9363 | { |
| 9364 | if (merge_exidx_entries |
| 9365 | && last_second_word == second_word && last_unwind_type == 1) |
| 9366 | elide = 1; |
| 9367 | unwind_type = 1; |
| 9368 | last_second_word = second_word; |
| 9369 | } |
| 9370 | /* Normal table entry. In theory we could merge these too, |
| 9371 | but duplicate entries are likely to be much less common. */ |
| 9372 | else |
| 9373 | unwind_type = 2; |
| 9374 | |
| 9375 | if (elide) |
| 9376 | { |
| 9377 | add_unwind_table_edit (&unwind_edit_head, &unwind_edit_tail, |
| 9378 | DELETE_EXIDX_ENTRY, NULL, j / 8); |
| 9379 | |
| 9380 | deleted_exidx_bytes += 8; |
| 9381 | } |
| 9382 | |
| 9383 | last_unwind_type = unwind_type; |
| 9384 | } |
| 9385 | |
| 9386 | /* Free contents if we allocated it ourselves. */ |
| 9387 | if (contents != hdr->contents) |
| 9388 | free (contents); |
| 9389 | |
| 9390 | /* Record edits to be applied later (in elf32_arm_write_section). */ |
| 9391 | exidx_arm_data->u.exidx.unwind_edit_list = unwind_edit_head; |
| 9392 | exidx_arm_data->u.exidx.unwind_edit_tail = unwind_edit_tail; |
| 9393 | |
| 9394 | if (deleted_exidx_bytes > 0) |
| 9395 | adjust_exidx_size(exidx_sec, -deleted_exidx_bytes); |
| 9396 | |
| 9397 | last_exidx_sec = exidx_sec; |
| 9398 | last_text_sec = sec; |
| 9399 | } |
| 9400 | |
| 9401 | /* Add terminating CANTUNWIND entry. */ |
| 9402 | if (last_exidx_sec && last_unwind_type != 0) |
| 9403 | insert_cantunwind_after(last_text_sec, last_exidx_sec); |
| 9404 | |
| 9405 | return TRUE; |
| 9406 | } |
| 9407 | |
| 9408 | static bfd_boolean |
| 9409 | elf32_arm_output_glue_section (struct bfd_link_info *info, bfd *obfd, |
| 9410 | bfd *ibfd, const char *name) |
| 9411 | { |
| 9412 | asection *sec, *osec; |
| 9413 | |
| 9414 | sec = bfd_get_section_by_name (ibfd, name); |
| 9415 | if (sec == NULL || (sec->flags & SEC_EXCLUDE) != 0) |
| 9416 | return TRUE; |
| 9417 | |
| 9418 | osec = sec->output_section; |
| 9419 | if (elf32_arm_write_section (obfd, info, sec, sec->contents)) |
| 9420 | return TRUE; |
| 9421 | |
| 9422 | if (! bfd_set_section_contents (obfd, osec, sec->contents, |
| 9423 | sec->output_offset, sec->size)) |
| 9424 | return FALSE; |
| 9425 | |
| 9426 | return TRUE; |
| 9427 | } |
| 9428 | |
| 9429 | static bfd_boolean |
| 9430 | elf32_arm_final_link (bfd *abfd, struct bfd_link_info *info) |
| 9431 | { |
| 9432 | struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (info); |
| 9433 | asection *sec, *osec; |
| 9434 | |
| 9435 | if (globals == NULL) |
| 9436 | return FALSE; |
| 9437 | |
| 9438 | /* Invoke the regular ELF backend linker to do all the work. */ |
| 9439 | if (!bfd_elf_final_link (abfd, info)) |
| 9440 | return FALSE; |
| 9441 | |
| 9442 | /* Process stub sections (eg BE8 encoding, ...). */ |
| 9443 | struct elf32_arm_link_hash_table *htab = elf32_arm_hash_table (info); |
| 9444 | int i; |
| 9445 | for (i=0; i<htab->top_id; i++) |
| 9446 | { |
| 9447 | sec = htab->stub_group[i].stub_sec; |
| 9448 | /* Only process it once, in its link_sec slot. */ |
| 9449 | if (sec && i == htab->stub_group[i].link_sec->id) |
| 9450 | { |
| 9451 | osec = sec->output_section; |
| 9452 | elf32_arm_write_section (abfd, info, sec, sec->contents); |
| 9453 | if (! bfd_set_section_contents (abfd, osec, sec->contents, |
| 9454 | sec->output_offset, sec->size)) |
| 9455 | return FALSE; |
| 9456 | } |
| 9457 | } |
| 9458 | |
| 9459 | /* Write out any glue sections now that we have created all the |
| 9460 | stubs. */ |
| 9461 | if (globals->bfd_of_glue_owner != NULL) |
| 9462 | { |
| 9463 | if (! elf32_arm_output_glue_section (info, abfd, |
| 9464 | globals->bfd_of_glue_owner, |
| 9465 | ARM2THUMB_GLUE_SECTION_NAME)) |
| 9466 | return FALSE; |
| 9467 | |
| 9468 | if (! elf32_arm_output_glue_section (info, abfd, |
| 9469 | globals->bfd_of_glue_owner, |
| 9470 | THUMB2ARM_GLUE_SECTION_NAME)) |
| 9471 | return FALSE; |
| 9472 | |
| 9473 | if (! elf32_arm_output_glue_section (info, abfd, |
| 9474 | globals->bfd_of_glue_owner, |
| 9475 | VFP11_ERRATUM_VENEER_SECTION_NAME)) |
| 9476 | return FALSE; |
| 9477 | |
| 9478 | if (! elf32_arm_output_glue_section (info, abfd, |
| 9479 | globals->bfd_of_glue_owner, |
| 9480 | ARM_BX_GLUE_SECTION_NAME)) |
| 9481 | return FALSE; |
| 9482 | } |
| 9483 | |
| 9484 | return TRUE; |
| 9485 | } |
| 9486 | |
| 9487 | /* Set the right machine number. */ |
| 9488 | |
| 9489 | static bfd_boolean |
| 9490 | elf32_arm_object_p (bfd *abfd) |
| 9491 | { |
| 9492 | unsigned int mach; |
| 9493 | |
| 9494 | mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION); |
| 9495 | |
| 9496 | if (mach != bfd_mach_arm_unknown) |
| 9497 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); |
| 9498 | |
| 9499 | else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT) |
| 9500 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312); |
| 9501 | |
| 9502 | else |
| 9503 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); |
| 9504 | |
| 9505 | return TRUE; |
| 9506 | } |
| 9507 | |
| 9508 | /* Function to keep ARM specific flags in the ELF header. */ |
| 9509 | |
| 9510 | static bfd_boolean |
| 9511 | elf32_arm_set_private_flags (bfd *abfd, flagword flags) |
| 9512 | { |
| 9513 | if (elf_flags_init (abfd) |
| 9514 | && elf_elfheader (abfd)->e_flags != flags) |
| 9515 | { |
| 9516 | if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN) |
| 9517 | { |
| 9518 | if (flags & EF_ARM_INTERWORK) |
| 9519 | (*_bfd_error_handler) |
| 9520 | (_("Warning: Not setting interworking flag of %B since it has already been specified as non-interworking"), |
| 9521 | abfd); |
| 9522 | else |
| 9523 | _bfd_error_handler |
| 9524 | (_("Warning: Clearing the interworking flag of %B due to outside request"), |
| 9525 | abfd); |
| 9526 | } |
| 9527 | } |
| 9528 | else |
| 9529 | { |
| 9530 | elf_elfheader (abfd)->e_flags = flags; |
| 9531 | elf_flags_init (abfd) = TRUE; |
| 9532 | } |
| 9533 | |
| 9534 | return TRUE; |
| 9535 | } |
| 9536 | |
| 9537 | /* Copy backend specific data from one object module to another. */ |
| 9538 | |
| 9539 | static bfd_boolean |
| 9540 | elf32_arm_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| 9541 | { |
| 9542 | flagword in_flags; |
| 9543 | flagword out_flags; |
| 9544 | |
| 9545 | if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd)) |
| 9546 | return TRUE; |
| 9547 | |
| 9548 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 9549 | out_flags = elf_elfheader (obfd)->e_flags; |
| 9550 | |
| 9551 | if (elf_flags_init (obfd) |
| 9552 | && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN |
| 9553 | && in_flags != out_flags) |
| 9554 | { |
| 9555 | /* Cannot mix APCS26 and APCS32 code. */ |
| 9556 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
| 9557 | return FALSE; |
| 9558 | |
| 9559 | /* Cannot mix float APCS and non-float APCS code. */ |
| 9560 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
| 9561 | return FALSE; |
| 9562 | |
| 9563 | /* If the src and dest have different interworking flags |
| 9564 | then turn off the interworking bit. */ |
| 9565 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
| 9566 | { |
| 9567 | if (out_flags & EF_ARM_INTERWORK) |
| 9568 | _bfd_error_handler |
| 9569 | (_("Warning: Clearing the interworking flag of %B because non-interworking code in %B has been linked with it"), |
| 9570 | obfd, ibfd); |
| 9571 | |
| 9572 | in_flags &= ~EF_ARM_INTERWORK; |
| 9573 | } |
| 9574 | |
| 9575 | /* Likewise for PIC, though don't warn for this case. */ |
| 9576 | if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC)) |
| 9577 | in_flags &= ~EF_ARM_PIC; |
| 9578 | } |
| 9579 | |
| 9580 | elf_elfheader (obfd)->e_flags = in_flags; |
| 9581 | elf_flags_init (obfd) = TRUE; |
| 9582 | |
| 9583 | /* Also copy the EI_OSABI field. */ |
| 9584 | elf_elfheader (obfd)->e_ident[EI_OSABI] = |
| 9585 | elf_elfheader (ibfd)->e_ident[EI_OSABI]; |
| 9586 | |
| 9587 | /* Copy object attributes. */ |
| 9588 | _bfd_elf_copy_obj_attributes (ibfd, obfd); |
| 9589 | |
| 9590 | return TRUE; |
| 9591 | } |
| 9592 | |
| 9593 | /* Values for Tag_ABI_PCS_R9_use. */ |
| 9594 | enum |
| 9595 | { |
| 9596 | AEABI_R9_V6, |
| 9597 | AEABI_R9_SB, |
| 9598 | AEABI_R9_TLS, |
| 9599 | AEABI_R9_unused |
| 9600 | }; |
| 9601 | |
| 9602 | /* Values for Tag_ABI_PCS_RW_data. */ |
| 9603 | enum |
| 9604 | { |
| 9605 | AEABI_PCS_RW_data_absolute, |
| 9606 | AEABI_PCS_RW_data_PCrel, |
| 9607 | AEABI_PCS_RW_data_SBrel, |
| 9608 | AEABI_PCS_RW_data_unused |
| 9609 | }; |
| 9610 | |
| 9611 | /* Values for Tag_ABI_enum_size. */ |
| 9612 | enum |
| 9613 | { |
| 9614 | AEABI_enum_unused, |
| 9615 | AEABI_enum_short, |
| 9616 | AEABI_enum_wide, |
| 9617 | AEABI_enum_forced_wide |
| 9618 | }; |
| 9619 | |
| 9620 | /* Determine whether an object attribute tag takes an integer, a |
| 9621 | string or both. */ |
| 9622 | |
| 9623 | static int |
| 9624 | elf32_arm_obj_attrs_arg_type (int tag) |
| 9625 | { |
| 9626 | if (tag == Tag_compatibility) |
| 9627 | return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL; |
| 9628 | else if (tag == Tag_nodefaults) |
| 9629 | return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_NO_DEFAULT; |
| 9630 | else if (tag == Tag_CPU_raw_name || tag == Tag_CPU_name) |
| 9631 | return ATTR_TYPE_FLAG_STR_VAL; |
| 9632 | else if (tag < 32) |
| 9633 | return ATTR_TYPE_FLAG_INT_VAL; |
| 9634 | else |
| 9635 | return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL; |
| 9636 | } |
| 9637 | |
| 9638 | /* The ABI defines that Tag_conformance should be emitted first, and that |
| 9639 | Tag_nodefaults should be second (if either is defined). This sets those |
| 9640 | two positions, and bumps up the position of all the remaining tags to |
| 9641 | compensate. */ |
| 9642 | static int |
| 9643 | elf32_arm_obj_attrs_order (int num) |
| 9644 | { |
| 9645 | if (num == LEAST_KNOWN_OBJ_ATTRIBUTE) |
| 9646 | return Tag_conformance; |
| 9647 | if (num == LEAST_KNOWN_OBJ_ATTRIBUTE + 1) |
| 9648 | return Tag_nodefaults; |
| 9649 | if ((num - 2) < Tag_nodefaults) |
| 9650 | return num - 2; |
| 9651 | if ((num - 1) < Tag_conformance) |
| 9652 | return num - 1; |
| 9653 | return num; |
| 9654 | } |
| 9655 | |
| 9656 | /* Attribute numbers >=64 (mod 128) can be safely ignored. */ |
| 9657 | static bfd_boolean |
| 9658 | elf32_arm_obj_attrs_handle_unknown (bfd *abfd, int tag) |
| 9659 | { |
| 9660 | if ((tag & 127) < 64) |
| 9661 | { |
| 9662 | _bfd_error_handler |
| 9663 | (_("%B: Unknown mandatory EABI object attribute %d"), |
| 9664 | abfd, tag); |
| 9665 | bfd_set_error (bfd_error_bad_value); |
| 9666 | return FALSE; |
| 9667 | } |
| 9668 | else |
| 9669 | { |
| 9670 | _bfd_error_handler |
| 9671 | (_("Warning: %B: Unknown EABI object attribute %d"), |
| 9672 | abfd, tag); |
| 9673 | return TRUE; |
| 9674 | } |
| 9675 | } |
| 9676 | |
| 9677 | /* Read the architecture from the Tag_also_compatible_with attribute, if any. |
| 9678 | Returns -1 if no architecture could be read. */ |
| 9679 | |
| 9680 | static int |
| 9681 | get_secondary_compatible_arch (bfd *abfd) |
| 9682 | { |
| 9683 | obj_attribute *attr = |
| 9684 | &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with]; |
| 9685 | |
| 9686 | /* Note: the tag and its argument below are uleb128 values, though |
| 9687 | currently-defined values fit in one byte for each. */ |
| 9688 | if (attr->s |
| 9689 | && attr->s[0] == Tag_CPU_arch |
| 9690 | && (attr->s[1] & 128) != 128 |
| 9691 | && attr->s[2] == 0) |
| 9692 | return attr->s[1]; |
| 9693 | |
| 9694 | /* This tag is "safely ignorable", so don't complain if it looks funny. */ |
| 9695 | return -1; |
| 9696 | } |
| 9697 | |
| 9698 | /* Set, or unset, the architecture of the Tag_also_compatible_with attribute. |
| 9699 | The tag is removed if ARCH is -1. */ |
| 9700 | |
| 9701 | static void |
| 9702 | set_secondary_compatible_arch (bfd *abfd, int arch) |
| 9703 | { |
| 9704 | obj_attribute *attr = |
| 9705 | &elf_known_obj_attributes_proc (abfd)[Tag_also_compatible_with]; |
| 9706 | |
| 9707 | if (arch == -1) |
| 9708 | { |
| 9709 | attr->s = NULL; |
| 9710 | return; |
| 9711 | } |
| 9712 | |
| 9713 | /* Note: the tag and its argument below are uleb128 values, though |
| 9714 | currently-defined values fit in one byte for each. */ |
| 9715 | if (!attr->s) |
| 9716 | attr->s = (char *) bfd_alloc (abfd, 3); |
| 9717 | attr->s[0] = Tag_CPU_arch; |
| 9718 | attr->s[1] = arch; |
| 9719 | attr->s[2] = '\0'; |
| 9720 | } |
| 9721 | |
| 9722 | /* Combine two values for Tag_CPU_arch, taking secondary compatibility tags |
| 9723 | into account. */ |
| 9724 | |
| 9725 | static int |
| 9726 | tag_cpu_arch_combine (bfd *ibfd, int oldtag, int *secondary_compat_out, |
| 9727 | int newtag, int secondary_compat) |
| 9728 | { |
| 9729 | #define T(X) TAG_CPU_ARCH_##X |
| 9730 | int tagl, tagh, result; |
| 9731 | const int v6t2[] = |
| 9732 | { |
| 9733 | T(V6T2), /* PRE_V4. */ |
| 9734 | T(V6T2), /* V4. */ |
| 9735 | T(V6T2), /* V4T. */ |
| 9736 | T(V6T2), /* V5T. */ |
| 9737 | T(V6T2), /* V5TE. */ |
| 9738 | T(V6T2), /* V5TEJ. */ |
| 9739 | T(V6T2), /* V6. */ |
| 9740 | T(V7), /* V6KZ. */ |
| 9741 | T(V6T2) /* V6T2. */ |
| 9742 | }; |
| 9743 | const int v6k[] = |
| 9744 | { |
| 9745 | T(V6K), /* PRE_V4. */ |
| 9746 | T(V6K), /* V4. */ |
| 9747 | T(V6K), /* V4T. */ |
| 9748 | T(V6K), /* V5T. */ |
| 9749 | T(V6K), /* V5TE. */ |
| 9750 | T(V6K), /* V5TEJ. */ |
| 9751 | T(V6K), /* V6. */ |
| 9752 | T(V6KZ), /* V6KZ. */ |
| 9753 | T(V7), /* V6T2. */ |
| 9754 | T(V6K) /* V6K. */ |
| 9755 | }; |
| 9756 | const int v7[] = |
| 9757 | { |
| 9758 | T(V7), /* PRE_V4. */ |
| 9759 | T(V7), /* V4. */ |
| 9760 | T(V7), /* V4T. */ |
| 9761 | T(V7), /* V5T. */ |
| 9762 | T(V7), /* V5TE. */ |
| 9763 | T(V7), /* V5TEJ. */ |
| 9764 | T(V7), /* V6. */ |
| 9765 | T(V7), /* V6KZ. */ |
| 9766 | T(V7), /* V6T2. */ |
| 9767 | T(V7), /* V6K. */ |
| 9768 | T(V7) /* V7. */ |
| 9769 | }; |
| 9770 | const int v6_m[] = |
| 9771 | { |
| 9772 | -1, /* PRE_V4. */ |
| 9773 | -1, /* V4. */ |
| 9774 | T(V6K), /* V4T. */ |
| 9775 | T(V6K), /* V5T. */ |
| 9776 | T(V6K), /* V5TE. */ |
| 9777 | T(V6K), /* V5TEJ. */ |
| 9778 | T(V6K), /* V6. */ |
| 9779 | T(V6KZ), /* V6KZ. */ |
| 9780 | T(V7), /* V6T2. */ |
| 9781 | T(V6K), /* V6K. */ |
| 9782 | T(V7), /* V7. */ |
| 9783 | T(V6_M) /* V6_M. */ |
| 9784 | }; |
| 9785 | const int v6s_m[] = |
| 9786 | { |
| 9787 | -1, /* PRE_V4. */ |
| 9788 | -1, /* V4. */ |
| 9789 | T(V6K), /* V4T. */ |
| 9790 | T(V6K), /* V5T. */ |
| 9791 | T(V6K), /* V5TE. */ |
| 9792 | T(V6K), /* V5TEJ. */ |
| 9793 | T(V6K), /* V6. */ |
| 9794 | T(V6KZ), /* V6KZ. */ |
| 9795 | T(V7), /* V6T2. */ |
| 9796 | T(V6K), /* V6K. */ |
| 9797 | T(V7), /* V7. */ |
| 9798 | T(V6S_M), /* V6_M. */ |
| 9799 | T(V6S_M) /* V6S_M. */ |
| 9800 | }; |
| 9801 | const int v7e_m[] = |
| 9802 | { |
| 9803 | -1, /* PRE_V4. */ |
| 9804 | -1, /* V4. */ |
| 9805 | T(V7E_M), /* V4T. */ |
| 9806 | T(V7E_M), /* V5T. */ |
| 9807 | T(V7E_M), /* V5TE. */ |
| 9808 | T(V7E_M), /* V5TEJ. */ |
| 9809 | T(V7E_M), /* V6. */ |
| 9810 | T(V7E_M), /* V6KZ. */ |
| 9811 | T(V7E_M), /* V6T2. */ |
| 9812 | T(V7E_M), /* V6K. */ |
| 9813 | T(V7E_M), /* V7. */ |
| 9814 | T(V7E_M), /* V6_M. */ |
| 9815 | T(V7E_M), /* V6S_M. */ |
| 9816 | T(V7E_M) /* V7E_M. */ |
| 9817 | }; |
| 9818 | const int v4t_plus_v6_m[] = |
| 9819 | { |
| 9820 | -1, /* PRE_V4. */ |
| 9821 | -1, /* V4. */ |
| 9822 | T(V4T), /* V4T. */ |
| 9823 | T(V5T), /* V5T. */ |
| 9824 | T(V5TE), /* V5TE. */ |
| 9825 | T(V5TEJ), /* V5TEJ. */ |
| 9826 | T(V6), /* V6. */ |
| 9827 | T(V6KZ), /* V6KZ. */ |
| 9828 | T(V6T2), /* V6T2. */ |
| 9829 | T(V6K), /* V6K. */ |
| 9830 | T(V7), /* V7. */ |
| 9831 | T(V6_M), /* V6_M. */ |
| 9832 | T(V6S_M), /* V6S_M. */ |
| 9833 | T(V7E_M), /* V7E_M. */ |
| 9834 | T(V4T_PLUS_V6_M) /* V4T plus V6_M. */ |
| 9835 | }; |
| 9836 | const int *comb[] = |
| 9837 | { |
| 9838 | v6t2, |
| 9839 | v6k, |
| 9840 | v7, |
| 9841 | v6_m, |
| 9842 | v6s_m, |
| 9843 | v7e_m, |
| 9844 | /* Pseudo-architecture. */ |
| 9845 | v4t_plus_v6_m |
| 9846 | }; |
| 9847 | |
| 9848 | /* Check we've not got a higher architecture than we know about. */ |
| 9849 | |
| 9850 | if (oldtag > MAX_TAG_CPU_ARCH || newtag > MAX_TAG_CPU_ARCH) |
| 9851 | { |
| 9852 | _bfd_error_handler (_("error: %B: Unknown CPU architecture"), ibfd); |
| 9853 | return -1; |
| 9854 | } |
| 9855 | |
| 9856 | /* Override old tag if we have a Tag_also_compatible_with on the output. */ |
| 9857 | |
| 9858 | if ((oldtag == T(V6_M) && *secondary_compat_out == T(V4T)) |
| 9859 | || (oldtag == T(V4T) && *secondary_compat_out == T(V6_M))) |
| 9860 | oldtag = T(V4T_PLUS_V6_M); |
| 9861 | |
| 9862 | /* And override the new tag if we have a Tag_also_compatible_with on the |
| 9863 | input. */ |
| 9864 | |
| 9865 | if ((newtag == T(V6_M) && secondary_compat == T(V4T)) |
| 9866 | || (newtag == T(V4T) && secondary_compat == T(V6_M))) |
| 9867 | newtag = T(V4T_PLUS_V6_M); |
| 9868 | |
| 9869 | tagl = (oldtag < newtag) ? oldtag : newtag; |
| 9870 | result = tagh = (oldtag > newtag) ? oldtag : newtag; |
| 9871 | |
| 9872 | /* Architectures before V6KZ add features monotonically. */ |
| 9873 | if (tagh <= TAG_CPU_ARCH_V6KZ) |
| 9874 | return result; |
| 9875 | |
| 9876 | result = comb[tagh - T(V6T2)][tagl]; |
| 9877 | |
| 9878 | /* Use Tag_CPU_arch == V4T and Tag_also_compatible_with (Tag_CPU_arch V6_M) |
| 9879 | as the canonical version. */ |
| 9880 | if (result == T(V4T_PLUS_V6_M)) |
| 9881 | { |
| 9882 | result = T(V4T); |
| 9883 | *secondary_compat_out = T(V6_M); |
| 9884 | } |
| 9885 | else |
| 9886 | *secondary_compat_out = -1; |
| 9887 | |
| 9888 | if (result == -1) |
| 9889 | { |
| 9890 | _bfd_error_handler (_("error: %B: Conflicting CPU architectures %d/%d"), |
| 9891 | ibfd, oldtag, newtag); |
| 9892 | return -1; |
| 9893 | } |
| 9894 | |
| 9895 | return result; |
| 9896 | #undef T |
| 9897 | } |
| 9898 | |
| 9899 | /* Merge EABI object attributes from IBFD into OBFD. Raise an error if there |
| 9900 | are conflicting attributes. */ |
| 9901 | |
| 9902 | static bfd_boolean |
| 9903 | elf32_arm_merge_eabi_attributes (bfd *ibfd, bfd *obfd) |
| 9904 | { |
| 9905 | obj_attribute *in_attr; |
| 9906 | obj_attribute *out_attr; |
| 9907 | /* Some tags have 0 = don't care, 1 = strong requirement, |
| 9908 | 2 = weak requirement. */ |
| 9909 | static const int order_021[3] = {0, 2, 1}; |
| 9910 | int i; |
| 9911 | bfd_boolean result = TRUE; |
| 9912 | |
| 9913 | /* Skip the linker stubs file. This preserves previous behavior |
| 9914 | of accepting unknown attributes in the first input file - but |
| 9915 | is that a bug? */ |
| 9916 | if (ibfd->flags & BFD_LINKER_CREATED) |
| 9917 | return TRUE; |
| 9918 | |
| 9919 | if (!elf_known_obj_attributes_proc (obfd)[0].i) |
| 9920 | { |
| 9921 | /* This is the first object. Copy the attributes. */ |
| 9922 | _bfd_elf_copy_obj_attributes (ibfd, obfd); |
| 9923 | |
| 9924 | out_attr = elf_known_obj_attributes_proc (obfd); |
| 9925 | |
| 9926 | /* Use the Tag_null value to indicate the attributes have been |
| 9927 | initialized. */ |
| 9928 | out_attr[0].i = 1; |
| 9929 | |
| 9930 | /* We do not output objects with Tag_MPextension_use_legacy - we move |
| 9931 | the attribute's value to Tag_MPextension_use. */ |
| 9932 | if (out_attr[Tag_MPextension_use_legacy].i != 0) |
| 9933 | { |
| 9934 | if (out_attr[Tag_MPextension_use].i != 0 |
| 9935 | && out_attr[Tag_MPextension_use_legacy].i |
| 9936 | != out_attr[Tag_MPextension_use].i) |
| 9937 | { |
| 9938 | _bfd_error_handler |
| 9939 | (_("Error: %B has both the current and legacy " |
| 9940 | "Tag_MPextension_use attributes"), ibfd); |
| 9941 | result = FALSE; |
| 9942 | } |
| 9943 | |
| 9944 | out_attr[Tag_MPextension_use] = |
| 9945 | out_attr[Tag_MPextension_use_legacy]; |
| 9946 | out_attr[Tag_MPextension_use_legacy].type = 0; |
| 9947 | out_attr[Tag_MPextension_use_legacy].i = 0; |
| 9948 | } |
| 9949 | |
| 9950 | return result; |
| 9951 | } |
| 9952 | |
| 9953 | in_attr = elf_known_obj_attributes_proc (ibfd); |
| 9954 | out_attr = elf_known_obj_attributes_proc (obfd); |
| 9955 | /* This needs to happen before Tag_ABI_FP_number_model is merged. */ |
| 9956 | if (in_attr[Tag_ABI_VFP_args].i != out_attr[Tag_ABI_VFP_args].i) |
| 9957 | { |
| 9958 | /* Ignore mismatches if the object doesn't use floating point. */ |
| 9959 | if (out_attr[Tag_ABI_FP_number_model].i == 0) |
| 9960 | out_attr[Tag_ABI_VFP_args].i = in_attr[Tag_ABI_VFP_args].i; |
| 9961 | else if (in_attr[Tag_ABI_FP_number_model].i != 0) |
| 9962 | { |
| 9963 | _bfd_error_handler |
| 9964 | (_("error: %B uses VFP register arguments, %B does not"), |
| 9965 | in_attr[Tag_ABI_VFP_args].i ? ibfd : obfd, |
| 9966 | in_attr[Tag_ABI_VFP_args].i ? obfd : ibfd); |
| 9967 | result = FALSE; |
| 9968 | } |
| 9969 | } |
| 9970 | |
| 9971 | for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++) |
| 9972 | { |
| 9973 | /* Merge this attribute with existing attributes. */ |
| 9974 | switch (i) |
| 9975 | { |
| 9976 | case Tag_CPU_raw_name: |
| 9977 | case Tag_CPU_name: |
| 9978 | /* These are merged after Tag_CPU_arch. */ |
| 9979 | break; |
| 9980 | |
| 9981 | case Tag_ABI_optimization_goals: |
| 9982 | case Tag_ABI_FP_optimization_goals: |
| 9983 | /* Use the first value seen. */ |
| 9984 | break; |
| 9985 | |
| 9986 | case Tag_CPU_arch: |
| 9987 | { |
| 9988 | int secondary_compat = -1, secondary_compat_out = -1; |
| 9989 | unsigned int saved_out_attr = out_attr[i].i; |
| 9990 | static const char *name_table[] = { |
| 9991 | /* These aren't real CPU names, but we can't guess |
| 9992 | that from the architecture version alone. */ |
| 9993 | "Pre v4", |
| 9994 | "ARM v4", |
| 9995 | "ARM v4T", |
| 9996 | "ARM v5T", |
| 9997 | "ARM v5TE", |
| 9998 | "ARM v5TEJ", |
| 9999 | "ARM v6", |
| 10000 | "ARM v6KZ", |
| 10001 | "ARM v6T2", |
| 10002 | "ARM v6K", |
| 10003 | "ARM v7", |
| 10004 | "ARM v6-M", |
| 10005 | "ARM v6S-M" |
| 10006 | }; |
| 10007 | |
| 10008 | /* Merge Tag_CPU_arch and Tag_also_compatible_with. */ |
| 10009 | secondary_compat = get_secondary_compatible_arch (ibfd); |
| 10010 | secondary_compat_out = get_secondary_compatible_arch (obfd); |
| 10011 | out_attr[i].i = tag_cpu_arch_combine (ibfd, out_attr[i].i, |
| 10012 | &secondary_compat_out, |
| 10013 | in_attr[i].i, |
| 10014 | secondary_compat); |
| 10015 | set_secondary_compatible_arch (obfd, secondary_compat_out); |
| 10016 | |
| 10017 | /* Merge Tag_CPU_name and Tag_CPU_raw_name. */ |
| 10018 | if (out_attr[i].i == saved_out_attr) |
| 10019 | ; /* Leave the names alone. */ |
| 10020 | else if (out_attr[i].i == in_attr[i].i) |
| 10021 | { |
| 10022 | /* The output architecture has been changed to match the |
| 10023 | input architecture. Use the input names. */ |
| 10024 | out_attr[Tag_CPU_name].s = in_attr[Tag_CPU_name].s |
| 10025 | ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_name].s) |
| 10026 | : NULL; |
| 10027 | out_attr[Tag_CPU_raw_name].s = in_attr[Tag_CPU_raw_name].s |
| 10028 | ? _bfd_elf_attr_strdup (obfd, in_attr[Tag_CPU_raw_name].s) |
| 10029 | : NULL; |
| 10030 | } |
| 10031 | else |
| 10032 | { |
| 10033 | out_attr[Tag_CPU_name].s = NULL; |
| 10034 | out_attr[Tag_CPU_raw_name].s = NULL; |
| 10035 | } |
| 10036 | |
| 10037 | /* If we still don't have a value for Tag_CPU_name, |
| 10038 | make one up now. Tag_CPU_raw_name remains blank. */ |
| 10039 | if (out_attr[Tag_CPU_name].s == NULL |
| 10040 | && out_attr[i].i < ARRAY_SIZE (name_table)) |
| 10041 | out_attr[Tag_CPU_name].s = |
| 10042 | _bfd_elf_attr_strdup (obfd, name_table[out_attr[i].i]); |
| 10043 | } |
| 10044 | break; |
| 10045 | |
| 10046 | case Tag_ARM_ISA_use: |
| 10047 | case Tag_THUMB_ISA_use: |
| 10048 | case Tag_WMMX_arch: |
| 10049 | case Tag_Advanced_SIMD_arch: |
| 10050 | /* ??? Do Advanced_SIMD (NEON) and WMMX conflict? */ |
| 10051 | case Tag_ABI_FP_rounding: |
| 10052 | case Tag_ABI_FP_exceptions: |
| 10053 | case Tag_ABI_FP_user_exceptions: |
| 10054 | case Tag_ABI_FP_number_model: |
| 10055 | case Tag_FP_HP_extension: |
| 10056 | case Tag_CPU_unaligned_access: |
| 10057 | case Tag_T2EE_use: |
| 10058 | case Tag_MPextension_use: |
| 10059 | /* Use the largest value specified. */ |
| 10060 | if (in_attr[i].i > out_attr[i].i) |
| 10061 | out_attr[i].i = in_attr[i].i; |
| 10062 | break; |
| 10063 | |
| 10064 | case Tag_ABI_align_preserved: |
| 10065 | case Tag_ABI_PCS_RO_data: |
| 10066 | /* Use the smallest value specified. */ |
| 10067 | if (in_attr[i].i < out_attr[i].i) |
| 10068 | out_attr[i].i = in_attr[i].i; |
| 10069 | break; |
| 10070 | |
| 10071 | case Tag_ABI_align_needed: |
| 10072 | if ((in_attr[i].i > 0 || out_attr[i].i > 0) |
| 10073 | && (in_attr[Tag_ABI_align_preserved].i == 0 |
| 10074 | || out_attr[Tag_ABI_align_preserved].i == 0)) |
| 10075 | { |
| 10076 | /* This error message should be enabled once all non-conformant |
| 10077 | binaries in the toolchain have had the attributes set |
| 10078 | properly. |
| 10079 | _bfd_error_handler |
| 10080 | (_("error: %B: 8-byte data alignment conflicts with %B"), |
| 10081 | obfd, ibfd); |
| 10082 | result = FALSE; */ |
| 10083 | } |
| 10084 | /* Fall through. */ |
| 10085 | case Tag_ABI_FP_denormal: |
| 10086 | case Tag_ABI_PCS_GOT_use: |
| 10087 | /* Use the "greatest" from the sequence 0, 2, 1, or the largest |
| 10088 | value if greater than 2 (for future-proofing). */ |
| 10089 | if ((in_attr[i].i > 2 && in_attr[i].i > out_attr[i].i) |
| 10090 | || (in_attr[i].i <= 2 && out_attr[i].i <= 2 |
| 10091 | && order_021[in_attr[i].i] > order_021[out_attr[i].i])) |
| 10092 | out_attr[i].i = in_attr[i].i; |
| 10093 | break; |
| 10094 | |
| 10095 | case Tag_Virtualization_use: |
| 10096 | /* The virtualization tag effectively stores two bits of |
| 10097 | information: the intended use of TrustZone (in bit 0), and the |
| 10098 | intended use of Virtualization (in bit 1). */ |
| 10099 | if (out_attr[i].i == 0) |
| 10100 | out_attr[i].i = in_attr[i].i; |
| 10101 | else if (in_attr[i].i != 0 |
| 10102 | && in_attr[i].i != out_attr[i].i) |
| 10103 | { |
| 10104 | if (in_attr[i].i <= 3 && out_attr[i].i <= 3) |
| 10105 | out_attr[i].i = 3; |
| 10106 | else |
| 10107 | { |
| 10108 | _bfd_error_handler |
| 10109 | (_("error: %B: unable to merge virtualization attributes " |
| 10110 | "with %B"), |
| 10111 | obfd, ibfd); |
| 10112 | result = FALSE; |
| 10113 | } |
| 10114 | } |
| 10115 | break; |
| 10116 | |
| 10117 | case Tag_CPU_arch_profile: |
| 10118 | if (out_attr[i].i != in_attr[i].i) |
| 10119 | { |
| 10120 | /* 0 will merge with anything. |
| 10121 | 'A' and 'S' merge to 'A'. |
| 10122 | 'R' and 'S' merge to 'R'. |
| 10123 | 'M' and 'A|R|S' is an error. */ |
| 10124 | if (out_attr[i].i == 0 |
| 10125 | || (out_attr[i].i == 'S' |
| 10126 | && (in_attr[i].i == 'A' || in_attr[i].i == 'R'))) |
| 10127 | out_attr[i].i = in_attr[i].i; |
| 10128 | else if (in_attr[i].i == 0 |
| 10129 | || (in_attr[i].i == 'S' |
| 10130 | && (out_attr[i].i == 'A' || out_attr[i].i == 'R'))) |
| 10131 | ; /* Do nothing. */ |
| 10132 | else |
| 10133 | { |
| 10134 | _bfd_error_handler |
| 10135 | (_("error: %B: Conflicting architecture profiles %c/%c"), |
| 10136 | ibfd, |
| 10137 | in_attr[i].i ? in_attr[i].i : '0', |
| 10138 | out_attr[i].i ? out_attr[i].i : '0'); |
| 10139 | result = FALSE; |
| 10140 | } |
| 10141 | } |
| 10142 | break; |
| 10143 | case Tag_FP_arch: |
| 10144 | { |
| 10145 | /* Tag_ABI_HardFP_use is handled along with Tag_FP_arch since |
| 10146 | the meaning of Tag_ABI_HardFP_use depends on Tag_FP_arch |
| 10147 | when it's 0. It might mean absence of FP hardware if |
| 10148 | Tag_FP_arch is zero, otherwise it is effectively SP + DP. */ |
| 10149 | |
| 10150 | static const struct |
| 10151 | { |
| 10152 | int ver; |
| 10153 | int regs; |
| 10154 | } vfp_versions[7] = |
| 10155 | { |
| 10156 | {0, 0}, |
| 10157 | {1, 16}, |
| 10158 | {2, 16}, |
| 10159 | {3, 32}, |
| 10160 | {3, 16}, |
| 10161 | {4, 32}, |
| 10162 | {4, 16} |
| 10163 | }; |
| 10164 | int ver; |
| 10165 | int regs; |
| 10166 | int newval; |
| 10167 | |
| 10168 | /* If the output has no requirement about FP hardware, |
| 10169 | follow the requirement of the input. */ |
| 10170 | if (out_attr[i].i == 0) |
| 10171 | { |
| 10172 | BFD_ASSERT (out_attr[Tag_ABI_HardFP_use].i == 0); |
| 10173 | out_attr[i].i = in_attr[i].i; |
| 10174 | out_attr[Tag_ABI_HardFP_use].i |
| 10175 | = in_attr[Tag_ABI_HardFP_use].i; |
| 10176 | break; |
| 10177 | } |
| 10178 | /* If the input has no requirement about FP hardware, do |
| 10179 | nothing. */ |
| 10180 | else if (in_attr[i].i == 0) |
| 10181 | { |
| 10182 | BFD_ASSERT (in_attr[Tag_ABI_HardFP_use].i == 0); |
| 10183 | break; |
| 10184 | } |
| 10185 | |
| 10186 | /* Both the input and the output have nonzero Tag_FP_arch. |
| 10187 | So Tag_ABI_HardFP_use is (SP & DP) when it's zero. */ |
| 10188 | |
| 10189 | /* If both the input and the output have zero Tag_ABI_HardFP_use, |
| 10190 | do nothing. */ |
| 10191 | if (in_attr[Tag_ABI_HardFP_use].i == 0 |
| 10192 | && out_attr[Tag_ABI_HardFP_use].i == 0) |
| 10193 | ; |
| 10194 | /* If the input and the output have different Tag_ABI_HardFP_use, |
| 10195 | the combination of them is 3 (SP & DP). */ |
| 10196 | else if (in_attr[Tag_ABI_HardFP_use].i |
| 10197 | != out_attr[Tag_ABI_HardFP_use].i) |
| 10198 | out_attr[Tag_ABI_HardFP_use].i = 3; |
| 10199 | |
| 10200 | /* Now we can handle Tag_FP_arch. */ |
| 10201 | |
| 10202 | /* Values greater than 6 aren't defined, so just pick the |
| 10203 | biggest */ |
| 10204 | if (in_attr[i].i > 6 && in_attr[i].i > out_attr[i].i) |
| 10205 | { |
| 10206 | out_attr[i] = in_attr[i]; |
| 10207 | break; |
| 10208 | } |
| 10209 | /* The output uses the superset of input features |
| 10210 | (ISA version) and registers. */ |
| 10211 | ver = vfp_versions[in_attr[i].i].ver; |
| 10212 | if (ver < vfp_versions[out_attr[i].i].ver) |
| 10213 | ver = vfp_versions[out_attr[i].i].ver; |
| 10214 | regs = vfp_versions[in_attr[i].i].regs; |
| 10215 | if (regs < vfp_versions[out_attr[i].i].regs) |
| 10216 | regs = vfp_versions[out_attr[i].i].regs; |
| 10217 | /* This assumes all possible supersets are also a valid |
| 10218 | options. */ |
| 10219 | for (newval = 6; newval > 0; newval--) |
| 10220 | { |
| 10221 | if (regs == vfp_versions[newval].regs |
| 10222 | && ver == vfp_versions[newval].ver) |
| 10223 | break; |
| 10224 | } |
| 10225 | out_attr[i].i = newval; |
| 10226 | } |
| 10227 | break; |
| 10228 | case Tag_PCS_config: |
| 10229 | if (out_attr[i].i == 0) |
| 10230 | out_attr[i].i = in_attr[i].i; |
| 10231 | else if (in_attr[i].i != 0 && out_attr[i].i != 0) |
| 10232 | { |
| 10233 | /* It's sometimes ok to mix different configs, so this is only |
| 10234 | a warning. */ |
| 10235 | _bfd_error_handler |
| 10236 | (_("Warning: %B: Conflicting platform configuration"), ibfd); |
| 10237 | } |
| 10238 | break; |
| 10239 | case Tag_ABI_PCS_R9_use: |
| 10240 | if (in_attr[i].i != out_attr[i].i |
| 10241 | && out_attr[i].i != AEABI_R9_unused |
| 10242 | && in_attr[i].i != AEABI_R9_unused) |
| 10243 | { |
| 10244 | _bfd_error_handler |
| 10245 | (_("error: %B: Conflicting use of R9"), ibfd); |
| 10246 | result = FALSE; |
| 10247 | } |
| 10248 | if (out_attr[i].i == AEABI_R9_unused) |
| 10249 | out_attr[i].i = in_attr[i].i; |
| 10250 | break; |
| 10251 | case Tag_ABI_PCS_RW_data: |
| 10252 | if (in_attr[i].i == AEABI_PCS_RW_data_SBrel |
| 10253 | && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_SB |
| 10254 | && out_attr[Tag_ABI_PCS_R9_use].i != AEABI_R9_unused) |
| 10255 | { |
| 10256 | _bfd_error_handler |
| 10257 | (_("error: %B: SB relative addressing conflicts with use of R9"), |
| 10258 | ibfd); |
| 10259 | result = FALSE; |
| 10260 | } |
| 10261 | /* Use the smallest value specified. */ |
| 10262 | if (in_attr[i].i < out_attr[i].i) |
| 10263 | out_attr[i].i = in_attr[i].i; |
| 10264 | break; |
| 10265 | case Tag_ABI_PCS_wchar_t: |
| 10266 | if (out_attr[i].i && in_attr[i].i && out_attr[i].i != in_attr[i].i |
| 10267 | && !elf_arm_tdata (obfd)->no_wchar_size_warning) |
| 10268 | { |
| 10269 | _bfd_error_handler |
| 10270 | (_("warning: %B uses %u-byte wchar_t yet the output is to use %u-byte wchar_t; use of wchar_t values across objects may fail"), |
| 10271 | ibfd, in_attr[i].i, out_attr[i].i); |
| 10272 | } |
| 10273 | else if (in_attr[i].i && !out_attr[i].i) |
| 10274 | out_attr[i].i = in_attr[i].i; |
| 10275 | break; |
| 10276 | case Tag_ABI_enum_size: |
| 10277 | if (in_attr[i].i != AEABI_enum_unused) |
| 10278 | { |
| 10279 | if (out_attr[i].i == AEABI_enum_unused |
| 10280 | || out_attr[i].i == AEABI_enum_forced_wide) |
| 10281 | { |
| 10282 | /* The existing object is compatible with anything. |
| 10283 | Use whatever requirements the new object has. */ |
| 10284 | out_attr[i].i = in_attr[i].i; |
| 10285 | } |
| 10286 | else if (in_attr[i].i != AEABI_enum_forced_wide |
| 10287 | && out_attr[i].i != in_attr[i].i |
| 10288 | && !elf_arm_tdata (obfd)->no_enum_size_warning) |
| 10289 | { |
| 10290 | static const char *aeabi_enum_names[] = |
| 10291 | { "", "variable-size", "32-bit", "" }; |
| 10292 | const char *in_name = |
| 10293 | in_attr[i].i < ARRAY_SIZE(aeabi_enum_names) |
| 10294 | ? aeabi_enum_names[in_attr[i].i] |
| 10295 | : "<unknown>"; |
| 10296 | const char *out_name = |
| 10297 | out_attr[i].i < ARRAY_SIZE(aeabi_enum_names) |
| 10298 | ? aeabi_enum_names[out_attr[i].i] |
| 10299 | : "<unknown>"; |
| 10300 | _bfd_error_handler |
| 10301 | (_("warning: %B uses %s enums yet the output is to use %s enums; use of enum values across objects may fail"), |
| 10302 | ibfd, in_name, out_name); |
| 10303 | } |
| 10304 | } |
| 10305 | break; |
| 10306 | case Tag_ABI_VFP_args: |
| 10307 | /* Aready done. */ |
| 10308 | break; |
| 10309 | case Tag_ABI_WMMX_args: |
| 10310 | if (in_attr[i].i != out_attr[i].i) |
| 10311 | { |
| 10312 | _bfd_error_handler |
| 10313 | (_("error: %B uses iWMMXt register arguments, %B does not"), |
| 10314 | ibfd, obfd); |
| 10315 | result = FALSE; |
| 10316 | } |
| 10317 | break; |
| 10318 | case Tag_compatibility: |
| 10319 | /* Merged in target-independent code. */ |
| 10320 | break; |
| 10321 | case Tag_ABI_HardFP_use: |
| 10322 | /* This is handled along with Tag_FP_arch. */ |
| 10323 | break; |
| 10324 | case Tag_ABI_FP_16bit_format: |
| 10325 | if (in_attr[i].i != 0 && out_attr[i].i != 0) |
| 10326 | { |
| 10327 | if (in_attr[i].i != out_attr[i].i) |
| 10328 | { |
| 10329 | _bfd_error_handler |
| 10330 | (_("error: fp16 format mismatch between %B and %B"), |
| 10331 | ibfd, obfd); |
| 10332 | result = FALSE; |
| 10333 | } |
| 10334 | } |
| 10335 | if (in_attr[i].i != 0) |
| 10336 | out_attr[i].i = in_attr[i].i; |
| 10337 | break; |
| 10338 | |
| 10339 | case Tag_DIV_use: |
| 10340 | /* This tag is set to zero if we can use UDIV and SDIV in Thumb |
| 10341 | mode on a v7-M or v7-R CPU; to one if we can not use UDIV or |
| 10342 | SDIV at all; and to two if we can use UDIV or SDIV on a v7-A |
| 10343 | CPU. We will merge as follows: If the input attribute's value |
| 10344 | is one then the output attribute's value remains unchanged. If |
| 10345 | the input attribute's value is zero or two then if the output |
| 10346 | attribute's value is one the output value is set to the input |
| 10347 | value, otherwise the output value must be the same as the |
| 10348 | inputs. */ |
| 10349 | if (in_attr[i].i != 1 && out_attr[i].i != 1) |
| 10350 | { |
| 10351 | if (in_attr[i].i != out_attr[i].i) |
| 10352 | { |
| 10353 | _bfd_error_handler |
| 10354 | (_("DIV usage mismatch between %B and %B"), |
| 10355 | ibfd, obfd); |
| 10356 | result = FALSE; |
| 10357 | } |
| 10358 | } |
| 10359 | |
| 10360 | if (in_attr[i].i != 1) |
| 10361 | out_attr[i].i = in_attr[i].i; |
| 10362 | |
| 10363 | break; |
| 10364 | |
| 10365 | case Tag_MPextension_use_legacy: |
| 10366 | /* We don't output objects with Tag_MPextension_use_legacy - we |
| 10367 | move the value to Tag_MPextension_use. */ |
| 10368 | if (in_attr[i].i != 0 && in_attr[Tag_MPextension_use].i != 0) |
| 10369 | { |
| 10370 | if (in_attr[Tag_MPextension_use].i != in_attr[i].i) |
| 10371 | { |
| 10372 | _bfd_error_handler |
| 10373 | (_("%B has has both the current and legacy " |
| 10374 | "Tag_MPextension_use attributes"), |
| 10375 | ibfd); |
| 10376 | result = FALSE; |
| 10377 | } |
| 10378 | } |
| 10379 | |
| 10380 | if (in_attr[i].i > out_attr[Tag_MPextension_use].i) |
| 10381 | out_attr[Tag_MPextension_use] = in_attr[i]; |
| 10382 | |
| 10383 | break; |
| 10384 | |
| 10385 | case Tag_nodefaults: |
| 10386 | /* This tag is set if it exists, but the value is unused (and is |
| 10387 | typically zero). We don't actually need to do anything here - |
| 10388 | the merge happens automatically when the type flags are merged |
| 10389 | below. */ |
| 10390 | break; |
| 10391 | case Tag_also_compatible_with: |
| 10392 | /* Already done in Tag_CPU_arch. */ |
| 10393 | break; |
| 10394 | case Tag_conformance: |
| 10395 | /* Keep the attribute if it matches. Throw it away otherwise. |
| 10396 | No attribute means no claim to conform. */ |
| 10397 | if (!in_attr[i].s || !out_attr[i].s |
| 10398 | || strcmp (in_attr[i].s, out_attr[i].s) != 0) |
| 10399 | out_attr[i].s = NULL; |
| 10400 | break; |
| 10401 | |
| 10402 | default: |
| 10403 | result |
| 10404 | = result && _bfd_elf_merge_unknown_attribute_low (ibfd, obfd, i); |
| 10405 | } |
| 10406 | |
| 10407 | /* If out_attr was copied from in_attr then it won't have a type yet. */ |
| 10408 | if (in_attr[i].type && !out_attr[i].type) |
| 10409 | out_attr[i].type = in_attr[i].type; |
| 10410 | } |
| 10411 | |
| 10412 | /* Merge Tag_compatibility attributes and any common GNU ones. */ |
| 10413 | if (!_bfd_elf_merge_object_attributes (ibfd, obfd)) |
| 10414 | return FALSE; |
| 10415 | |
| 10416 | /* Check for any attributes not known on ARM. */ |
| 10417 | result &= _bfd_elf_merge_unknown_attribute_list (ibfd, obfd); |
| 10418 | |
| 10419 | return result; |
| 10420 | } |
| 10421 | |
| 10422 | |
| 10423 | /* Return TRUE if the two EABI versions are incompatible. */ |
| 10424 | |
| 10425 | static bfd_boolean |
| 10426 | elf32_arm_versions_compatible (unsigned iver, unsigned over) |
| 10427 | { |
| 10428 | /* v4 and v5 are the same spec before and after it was released, |
| 10429 | so allow mixing them. */ |
| 10430 | if ((iver == EF_ARM_EABI_VER4 && over == EF_ARM_EABI_VER5) |
| 10431 | || (iver == EF_ARM_EABI_VER5 && over == EF_ARM_EABI_VER4)) |
| 10432 | return TRUE; |
| 10433 | |
| 10434 | return (iver == over); |
| 10435 | } |
| 10436 | |
| 10437 | /* Merge backend specific data from an object file to the output |
| 10438 | object file when linking. */ |
| 10439 | |
| 10440 | static bfd_boolean |
| 10441 | elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd); |
| 10442 | |
| 10443 | /* Display the flags field. */ |
| 10444 | |
| 10445 | static bfd_boolean |
| 10446 | elf32_arm_print_private_bfd_data (bfd *abfd, void * ptr) |
| 10447 | { |
| 10448 | FILE * file = (FILE *) ptr; |
| 10449 | unsigned long flags; |
| 10450 | |
| 10451 | BFD_ASSERT (abfd != NULL && ptr != NULL); |
| 10452 | |
| 10453 | /* Print normal ELF private data. */ |
| 10454 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
| 10455 | |
| 10456 | flags = elf_elfheader (abfd)->e_flags; |
| 10457 | /* Ignore init flag - it may not be set, despite the flags field |
| 10458 | containing valid data. */ |
| 10459 | |
| 10460 | /* xgettext:c-format */ |
| 10461 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
| 10462 | |
| 10463 | switch (EF_ARM_EABI_VERSION (flags)) |
| 10464 | { |
| 10465 | case EF_ARM_EABI_UNKNOWN: |
| 10466 | /* The following flag bits are GNU extensions and not part of the |
| 10467 | official ARM ELF extended ABI. Hence they are only decoded if |
| 10468 | the EABI version is not set. */ |
| 10469 | if (flags & EF_ARM_INTERWORK) |
| 10470 | fprintf (file, _(" [interworking enabled]")); |
| 10471 | |
| 10472 | if (flags & EF_ARM_APCS_26) |
| 10473 | fprintf (file, " [APCS-26]"); |
| 10474 | else |
| 10475 | fprintf (file, " [APCS-32]"); |
| 10476 | |
| 10477 | if (flags & EF_ARM_VFP_FLOAT) |
| 10478 | fprintf (file, _(" [VFP float format]")); |
| 10479 | else if (flags & EF_ARM_MAVERICK_FLOAT) |
| 10480 | fprintf (file, _(" [Maverick float format]")); |
| 10481 | else |
| 10482 | fprintf (file, _(" [FPA float format]")); |
| 10483 | |
| 10484 | if (flags & EF_ARM_APCS_FLOAT) |
| 10485 | fprintf (file, _(" [floats passed in float registers]")); |
| 10486 | |
| 10487 | if (flags & EF_ARM_PIC) |
| 10488 | fprintf (file, _(" [position independent]")); |
| 10489 | |
| 10490 | if (flags & EF_ARM_NEW_ABI) |
| 10491 | fprintf (file, _(" [new ABI]")); |
| 10492 | |
| 10493 | if (flags & EF_ARM_OLD_ABI) |
| 10494 | fprintf (file, _(" [old ABI]")); |
| 10495 | |
| 10496 | if (flags & EF_ARM_SOFT_FLOAT) |
| 10497 | fprintf (file, _(" [software FP]")); |
| 10498 | |
| 10499 | flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT |
| 10500 | | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI |
| 10501 | | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT |
| 10502 | | EF_ARM_MAVERICK_FLOAT); |
| 10503 | break; |
| 10504 | |
| 10505 | case EF_ARM_EABI_VER1: |
| 10506 | fprintf (file, _(" [Version1 EABI]")); |
| 10507 | |
| 10508 | if (flags & EF_ARM_SYMSARESORTED) |
| 10509 | fprintf (file, _(" [sorted symbol table]")); |
| 10510 | else |
| 10511 | fprintf (file, _(" [unsorted symbol table]")); |
| 10512 | |
| 10513 | flags &= ~ EF_ARM_SYMSARESORTED; |
| 10514 | break; |
| 10515 | |
| 10516 | case EF_ARM_EABI_VER2: |
| 10517 | fprintf (file, _(" [Version2 EABI]")); |
| 10518 | |
| 10519 | if (flags & EF_ARM_SYMSARESORTED) |
| 10520 | fprintf (file, _(" [sorted symbol table]")); |
| 10521 | else |
| 10522 | fprintf (file, _(" [unsorted symbol table]")); |
| 10523 | |
| 10524 | if (flags & EF_ARM_DYNSYMSUSESEGIDX) |
| 10525 | fprintf (file, _(" [dynamic symbols use segment index]")); |
| 10526 | |
| 10527 | if (flags & EF_ARM_MAPSYMSFIRST) |
| 10528 | fprintf (file, _(" [mapping symbols precede others]")); |
| 10529 | |
| 10530 | flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX |
| 10531 | | EF_ARM_MAPSYMSFIRST); |
| 10532 | break; |
| 10533 | |
| 10534 | case EF_ARM_EABI_VER3: |
| 10535 | fprintf (file, _(" [Version3 EABI]")); |
| 10536 | break; |
| 10537 | |
| 10538 | case EF_ARM_EABI_VER4: |
| 10539 | fprintf (file, _(" [Version4 EABI]")); |
| 10540 | goto eabi; |
| 10541 | |
| 10542 | case EF_ARM_EABI_VER5: |
| 10543 | fprintf (file, _(" [Version5 EABI]")); |
| 10544 | eabi: |
| 10545 | if (flags & EF_ARM_BE8) |
| 10546 | fprintf (file, _(" [BE8]")); |
| 10547 | |
| 10548 | if (flags & EF_ARM_LE8) |
| 10549 | fprintf (file, _(" [LE8]")); |
| 10550 | |
| 10551 | flags &= ~(EF_ARM_LE8 | EF_ARM_BE8); |
| 10552 | break; |
| 10553 | |
| 10554 | default: |
| 10555 | fprintf (file, _(" <EABI version unrecognised>")); |
| 10556 | break; |
| 10557 | } |
| 10558 | |
| 10559 | flags &= ~ EF_ARM_EABIMASK; |
| 10560 | |
| 10561 | if (flags & EF_ARM_RELEXEC) |
| 10562 | fprintf (file, _(" [relocatable executable]")); |
| 10563 | |
| 10564 | if (flags & EF_ARM_HASENTRY) |
| 10565 | fprintf (file, _(" [has entry point]")); |
| 10566 | |
| 10567 | flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY); |
| 10568 | |
| 10569 | if (flags) |
| 10570 | fprintf (file, _("<Unrecognised flag bits set>")); |
| 10571 | |
| 10572 | fputc ('\n', file); |
| 10573 | |
| 10574 | return TRUE; |
| 10575 | } |
| 10576 | |
| 10577 | static int |
| 10578 | elf32_arm_get_symbol_type (Elf_Internal_Sym * elf_sym, int type) |
| 10579 | { |
| 10580 | switch (ELF_ST_TYPE (elf_sym->st_info)) |
| 10581 | { |
| 10582 | case STT_ARM_TFUNC: |
| 10583 | return ELF_ST_TYPE (elf_sym->st_info); |
| 10584 | |
| 10585 | case STT_ARM_16BIT: |
| 10586 | /* If the symbol is not an object, return the STT_ARM_16BIT flag. |
| 10587 | This allows us to distinguish between data used by Thumb instructions |
| 10588 | and non-data (which is probably code) inside Thumb regions of an |
| 10589 | executable. */ |
| 10590 | if (type != STT_OBJECT && type != STT_TLS) |
| 10591 | return ELF_ST_TYPE (elf_sym->st_info); |
| 10592 | break; |
| 10593 | |
| 10594 | default: |
| 10595 | break; |
| 10596 | } |
| 10597 | |
| 10598 | return type; |
| 10599 | } |
| 10600 | |
| 10601 | static asection * |
| 10602 | elf32_arm_gc_mark_hook (asection *sec, |
| 10603 | struct bfd_link_info *info, |
| 10604 | Elf_Internal_Rela *rel, |
| 10605 | struct elf_link_hash_entry *h, |
| 10606 | Elf_Internal_Sym *sym) |
| 10607 | { |
| 10608 | if (h != NULL) |
| 10609 | switch (ELF32_R_TYPE (rel->r_info)) |
| 10610 | { |
| 10611 | case R_ARM_GNU_VTINHERIT: |
| 10612 | case R_ARM_GNU_VTENTRY: |
| 10613 | return NULL; |
| 10614 | } |
| 10615 | |
| 10616 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 10617 | } |
| 10618 | |
| 10619 | /* Update the got entry reference counts for the section being removed. */ |
| 10620 | |
| 10621 | static bfd_boolean |
| 10622 | elf32_arm_gc_sweep_hook (bfd * abfd, |
| 10623 | struct bfd_link_info * info, |
| 10624 | asection * sec, |
| 10625 | const Elf_Internal_Rela * relocs) |
| 10626 | { |
| 10627 | Elf_Internal_Shdr *symtab_hdr; |
| 10628 | struct elf_link_hash_entry **sym_hashes; |
| 10629 | bfd_signed_vma *local_got_refcounts; |
| 10630 | const Elf_Internal_Rela *rel, *relend; |
| 10631 | struct elf32_arm_link_hash_table * globals; |
| 10632 | |
| 10633 | if (info->relocatable) |
| 10634 | return TRUE; |
| 10635 | |
| 10636 | globals = elf32_arm_hash_table (info); |
| 10637 | if (globals == NULL) |
| 10638 | return FALSE; |
| 10639 | |
| 10640 | elf_section_data (sec)->local_dynrel = NULL; |
| 10641 | |
| 10642 | symtab_hdr = & elf_symtab_hdr (abfd); |
| 10643 | sym_hashes = elf_sym_hashes (abfd); |
| 10644 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 10645 | |
| 10646 | check_use_blx (globals); |
| 10647 | |
| 10648 | relend = relocs + sec->reloc_count; |
| 10649 | for (rel = relocs; rel < relend; rel++) |
| 10650 | { |
| 10651 | unsigned long r_symndx; |
| 10652 | struct elf_link_hash_entry *h = NULL; |
| 10653 | int r_type; |
| 10654 | |
| 10655 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 10656 | if (r_symndx >= symtab_hdr->sh_info) |
| 10657 | { |
| 10658 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 10659 | while (h->root.type == bfd_link_hash_indirect |
| 10660 | || h->root.type == bfd_link_hash_warning) |
| 10661 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 10662 | } |
| 10663 | |
| 10664 | r_type = ELF32_R_TYPE (rel->r_info); |
| 10665 | r_type = arm_real_reloc_type (globals, r_type); |
| 10666 | switch (r_type) |
| 10667 | { |
| 10668 | case R_ARM_GOT32: |
| 10669 | case R_ARM_GOT_PREL: |
| 10670 | case R_ARM_TLS_GD32: |
| 10671 | case R_ARM_TLS_IE32: |
| 10672 | if (h != NULL) |
| 10673 | { |
| 10674 | if (h->got.refcount > 0) |
| 10675 | h->got.refcount -= 1; |
| 10676 | } |
| 10677 | else if (local_got_refcounts != NULL) |
| 10678 | { |
| 10679 | if (local_got_refcounts[r_symndx] > 0) |
| 10680 | local_got_refcounts[r_symndx] -= 1; |
| 10681 | } |
| 10682 | break; |
| 10683 | |
| 10684 | case R_ARM_TLS_LDM32: |
| 10685 | globals->tls_ldm_got.refcount -= 1; |
| 10686 | break; |
| 10687 | |
| 10688 | case R_ARM_ABS32: |
| 10689 | case R_ARM_ABS32_NOI: |
| 10690 | case R_ARM_REL32: |
| 10691 | case R_ARM_REL32_NOI: |
| 10692 | case R_ARM_PC24: |
| 10693 | case R_ARM_PLT32: |
| 10694 | case R_ARM_CALL: |
| 10695 | case R_ARM_JUMP24: |
| 10696 | case R_ARM_PREL31: |
| 10697 | case R_ARM_THM_CALL: |
| 10698 | case R_ARM_THM_JUMP24: |
| 10699 | case R_ARM_THM_JUMP19: |
| 10700 | case R_ARM_MOVW_ABS_NC: |
| 10701 | case R_ARM_MOVT_ABS: |
| 10702 | case R_ARM_MOVW_PREL_NC: |
| 10703 | case R_ARM_MOVT_PREL: |
| 10704 | case R_ARM_THM_MOVW_ABS_NC: |
| 10705 | case R_ARM_THM_MOVT_ABS: |
| 10706 | case R_ARM_THM_MOVW_PREL_NC: |
| 10707 | case R_ARM_THM_MOVT_PREL: |
| 10708 | /* Should the interworking branches be here also? */ |
| 10709 | |
| 10710 | if (h != NULL) |
| 10711 | { |
| 10712 | struct elf32_arm_link_hash_entry *eh; |
| 10713 | struct elf32_arm_relocs_copied **pp; |
| 10714 | struct elf32_arm_relocs_copied *p; |
| 10715 | |
| 10716 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 10717 | |
| 10718 | if (h->plt.refcount > 0) |
| 10719 | { |
| 10720 | h->plt.refcount -= 1; |
| 10721 | if (r_type == R_ARM_THM_CALL) |
| 10722 | eh->plt_maybe_thumb_refcount--; |
| 10723 | |
| 10724 | if (r_type == R_ARM_THM_JUMP24 |
| 10725 | || r_type == R_ARM_THM_JUMP19) |
| 10726 | eh->plt_thumb_refcount--; |
| 10727 | } |
| 10728 | |
| 10729 | if (r_type == R_ARM_ABS32 |
| 10730 | || r_type == R_ARM_REL32 |
| 10731 | || r_type == R_ARM_ABS32_NOI |
| 10732 | || r_type == R_ARM_REL32_NOI) |
| 10733 | { |
| 10734 | for (pp = &eh->relocs_copied; (p = *pp) != NULL; |
| 10735 | pp = &p->next) |
| 10736 | if (p->section == sec) |
| 10737 | { |
| 10738 | p->count -= 1; |
| 10739 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_REL32 |
| 10740 | || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32_NOI) |
| 10741 | p->pc_count -= 1; |
| 10742 | if (p->count == 0) |
| 10743 | *pp = p->next; |
| 10744 | break; |
| 10745 | } |
| 10746 | } |
| 10747 | } |
| 10748 | break; |
| 10749 | |
| 10750 | default: |
| 10751 | break; |
| 10752 | } |
| 10753 | } |
| 10754 | |
| 10755 | return TRUE; |
| 10756 | } |
| 10757 | |
| 10758 | /* Look through the relocs for a section during the first phase. */ |
| 10759 | |
| 10760 | static bfd_boolean |
| 10761 | elf32_arm_check_relocs (bfd *abfd, struct bfd_link_info *info, |
| 10762 | asection *sec, const Elf_Internal_Rela *relocs) |
| 10763 | { |
| 10764 | Elf_Internal_Shdr *symtab_hdr; |
| 10765 | struct elf_link_hash_entry **sym_hashes; |
| 10766 | const Elf_Internal_Rela *rel; |
| 10767 | const Elf_Internal_Rela *rel_end; |
| 10768 | bfd *dynobj; |
| 10769 | asection *sreloc; |
| 10770 | struct elf32_arm_link_hash_table *htab; |
| 10771 | bfd_boolean needs_plt; |
| 10772 | unsigned long nsyms; |
| 10773 | |
| 10774 | if (info->relocatable) |
| 10775 | return TRUE; |
| 10776 | |
| 10777 | BFD_ASSERT (is_arm_elf (abfd)); |
| 10778 | |
| 10779 | htab = elf32_arm_hash_table (info); |
| 10780 | if (htab == NULL) |
| 10781 | return FALSE; |
| 10782 | |
| 10783 | sreloc = NULL; |
| 10784 | |
| 10785 | /* Create dynamic sections for relocatable executables so that we can |
| 10786 | copy relocations. */ |
| 10787 | if (htab->root.is_relocatable_executable |
| 10788 | && ! htab->root.dynamic_sections_created) |
| 10789 | { |
| 10790 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) |
| 10791 | return FALSE; |
| 10792 | } |
| 10793 | |
| 10794 | dynobj = elf_hash_table (info)->dynobj; |
| 10795 | symtab_hdr = & elf_symtab_hdr (abfd); |
| 10796 | sym_hashes = elf_sym_hashes (abfd); |
| 10797 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
| 10798 | |
| 10799 | rel_end = relocs + sec->reloc_count; |
| 10800 | for (rel = relocs; rel < rel_end; rel++) |
| 10801 | { |
| 10802 | struct elf_link_hash_entry *h; |
| 10803 | struct elf32_arm_link_hash_entry *eh; |
| 10804 | unsigned long r_symndx; |
| 10805 | int r_type; |
| 10806 | |
| 10807 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 10808 | r_type = ELF32_R_TYPE (rel->r_info); |
| 10809 | r_type = arm_real_reloc_type (htab, r_type); |
| 10810 | |
| 10811 | if (r_symndx >= nsyms |
| 10812 | /* PR 9934: It is possible to have relocations that do not |
| 10813 | refer to symbols, thus it is also possible to have an |
| 10814 | object file containing relocations but no symbol table. */ |
| 10815 | && (r_symndx > STN_UNDEF || nsyms > 0)) |
| 10816 | { |
| 10817 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd, |
| 10818 | r_symndx); |
| 10819 | return FALSE; |
| 10820 | } |
| 10821 | |
| 10822 | if (nsyms == 0 || r_symndx < symtab_hdr->sh_info) |
| 10823 | h = NULL; |
| 10824 | else |
| 10825 | { |
| 10826 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 10827 | while (h->root.type == bfd_link_hash_indirect |
| 10828 | || h->root.type == bfd_link_hash_warning) |
| 10829 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 10830 | } |
| 10831 | |
| 10832 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 10833 | |
| 10834 | switch (r_type) |
| 10835 | { |
| 10836 | case R_ARM_GOT32: |
| 10837 | case R_ARM_GOT_PREL: |
| 10838 | case R_ARM_TLS_GD32: |
| 10839 | case R_ARM_TLS_IE32: |
| 10840 | /* This symbol requires a global offset table entry. */ |
| 10841 | { |
| 10842 | int tls_type, old_tls_type; |
| 10843 | |
| 10844 | switch (r_type) |
| 10845 | { |
| 10846 | case R_ARM_TLS_GD32: tls_type = GOT_TLS_GD; break; |
| 10847 | case R_ARM_TLS_IE32: tls_type = GOT_TLS_IE; break; |
| 10848 | default: tls_type = GOT_NORMAL; break; |
| 10849 | } |
| 10850 | |
| 10851 | if (h != NULL) |
| 10852 | { |
| 10853 | h->got.refcount++; |
| 10854 | old_tls_type = elf32_arm_hash_entry (h)->tls_type; |
| 10855 | } |
| 10856 | else |
| 10857 | { |
| 10858 | bfd_signed_vma *local_got_refcounts; |
| 10859 | |
| 10860 | /* This is a global offset table entry for a local symbol. */ |
| 10861 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 10862 | if (local_got_refcounts == NULL) |
| 10863 | { |
| 10864 | bfd_size_type size; |
| 10865 | |
| 10866 | size = symtab_hdr->sh_info; |
| 10867 | size *= (sizeof (bfd_signed_vma) + sizeof (char)); |
| 10868 | local_got_refcounts = (bfd_signed_vma *) |
| 10869 | bfd_zalloc (abfd, size); |
| 10870 | if (local_got_refcounts == NULL) |
| 10871 | return FALSE; |
| 10872 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 10873 | elf32_arm_local_got_tls_type (abfd) |
| 10874 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); |
| 10875 | } |
| 10876 | local_got_refcounts[r_symndx] += 1; |
| 10877 | old_tls_type = elf32_arm_local_got_tls_type (abfd) [r_symndx]; |
| 10878 | } |
| 10879 | |
| 10880 | /* We will already have issued an error message if there is a |
| 10881 | TLS / non-TLS mismatch, based on the symbol type. We don't |
| 10882 | support any linker relaxations. So just combine any TLS |
| 10883 | types needed. */ |
| 10884 | if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL |
| 10885 | && tls_type != GOT_NORMAL) |
| 10886 | tls_type |= old_tls_type; |
| 10887 | |
| 10888 | if (old_tls_type != tls_type) |
| 10889 | { |
| 10890 | if (h != NULL) |
| 10891 | elf32_arm_hash_entry (h)->tls_type = tls_type; |
| 10892 | else |
| 10893 | elf32_arm_local_got_tls_type (abfd) [r_symndx] = tls_type; |
| 10894 | } |
| 10895 | } |
| 10896 | /* Fall through. */ |
| 10897 | |
| 10898 | case R_ARM_TLS_LDM32: |
| 10899 | if (r_type == R_ARM_TLS_LDM32) |
| 10900 | htab->tls_ldm_got.refcount++; |
| 10901 | /* Fall through. */ |
| 10902 | |
| 10903 | case R_ARM_GOTOFF32: |
| 10904 | case R_ARM_GOTPC: |
| 10905 | if (htab->sgot == NULL) |
| 10906 | { |
| 10907 | if (htab->root.dynobj == NULL) |
| 10908 | htab->root.dynobj = abfd; |
| 10909 | if (!create_got_section (htab->root.dynobj, info)) |
| 10910 | return FALSE; |
| 10911 | } |
| 10912 | break; |
| 10913 | |
| 10914 | case R_ARM_ABS12: |
| 10915 | /* VxWorks uses dynamic R_ARM_ABS12 relocations for |
| 10916 | ldr __GOTT_INDEX__ offsets. */ |
| 10917 | if (!htab->vxworks_p) |
| 10918 | break; |
| 10919 | /* Fall through. */ |
| 10920 | |
| 10921 | case R_ARM_PC24: |
| 10922 | case R_ARM_PLT32: |
| 10923 | case R_ARM_CALL: |
| 10924 | case R_ARM_JUMP24: |
| 10925 | case R_ARM_PREL31: |
| 10926 | case R_ARM_THM_CALL: |
| 10927 | case R_ARM_THM_JUMP24: |
| 10928 | case R_ARM_THM_JUMP19: |
| 10929 | needs_plt = 1; |
| 10930 | goto normal_reloc; |
| 10931 | |
| 10932 | case R_ARM_MOVW_ABS_NC: |
| 10933 | case R_ARM_MOVT_ABS: |
| 10934 | case R_ARM_THM_MOVW_ABS_NC: |
| 10935 | case R_ARM_THM_MOVT_ABS: |
| 10936 | if (info->shared) |
| 10937 | { |
| 10938 | (*_bfd_error_handler) |
| 10939 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
| 10940 | abfd, elf32_arm_howto_table_1[r_type].name, |
| 10941 | (h) ? h->root.root.string : "a local symbol"); |
| 10942 | bfd_set_error (bfd_error_bad_value); |
| 10943 | return FALSE; |
| 10944 | } |
| 10945 | |
| 10946 | /* Fall through. */ |
| 10947 | case R_ARM_ABS32: |
| 10948 | case R_ARM_ABS32_NOI: |
| 10949 | case R_ARM_REL32: |
| 10950 | case R_ARM_REL32_NOI: |
| 10951 | case R_ARM_MOVW_PREL_NC: |
| 10952 | case R_ARM_MOVT_PREL: |
| 10953 | case R_ARM_THM_MOVW_PREL_NC: |
| 10954 | case R_ARM_THM_MOVT_PREL: |
| 10955 | needs_plt = 0; |
| 10956 | normal_reloc: |
| 10957 | |
| 10958 | /* Should the interworking branches be listed here? */ |
| 10959 | if (h != NULL) |
| 10960 | { |
| 10961 | /* If this reloc is in a read-only section, we might |
| 10962 | need a copy reloc. We can't check reliably at this |
| 10963 | stage whether the section is read-only, as input |
| 10964 | sections have not yet been mapped to output sections. |
| 10965 | Tentatively set the flag for now, and correct in |
| 10966 | adjust_dynamic_symbol. */ |
| 10967 | if (!info->shared) |
| 10968 | h->non_got_ref = 1; |
| 10969 | |
| 10970 | /* We may need a .plt entry if the function this reloc |
| 10971 | refers to is in a different object. We can't tell for |
| 10972 | sure yet, because something later might force the |
| 10973 | symbol local. */ |
| 10974 | if (needs_plt) |
| 10975 | h->needs_plt = 1; |
| 10976 | |
| 10977 | /* If we create a PLT entry, this relocation will reference |
| 10978 | it, even if it's an ABS32 relocation. */ |
| 10979 | h->plt.refcount += 1; |
| 10980 | |
| 10981 | /* It's too early to use htab->use_blx here, so we have to |
| 10982 | record possible blx references separately from |
| 10983 | relocs that definitely need a thumb stub. */ |
| 10984 | |
| 10985 | if (r_type == R_ARM_THM_CALL) |
| 10986 | eh->plt_maybe_thumb_refcount += 1; |
| 10987 | |
| 10988 | if (r_type == R_ARM_THM_JUMP24 |
| 10989 | || r_type == R_ARM_THM_JUMP19) |
| 10990 | eh->plt_thumb_refcount += 1; |
| 10991 | } |
| 10992 | |
| 10993 | /* If we are creating a shared library or relocatable executable, |
| 10994 | and this is a reloc against a global symbol, or a non PC |
| 10995 | relative reloc against a local symbol, then we need to copy |
| 10996 | the reloc into the shared library. However, if we are linking |
| 10997 | with -Bsymbolic, we do not need to copy a reloc against a |
| 10998 | global symbol which is defined in an object we are |
| 10999 | including in the link (i.e., DEF_REGULAR is set). At |
| 11000 | this point we have not seen all the input files, so it is |
| 11001 | possible that DEF_REGULAR is not set now but will be set |
| 11002 | later (it is never cleared). We account for that |
| 11003 | possibility below by storing information in the |
| 11004 | relocs_copied field of the hash table entry. */ |
| 11005 | if ((info->shared || htab->root.is_relocatable_executable) |
| 11006 | && (sec->flags & SEC_ALLOC) != 0 |
| 11007 | && ((r_type == R_ARM_ABS32 || r_type == R_ARM_ABS32_NOI) |
| 11008 | || (h != NULL && ! h->needs_plt |
| 11009 | && (! info->symbolic || ! h->def_regular)))) |
| 11010 | { |
| 11011 | struct elf32_arm_relocs_copied *p, **head; |
| 11012 | |
| 11013 | /* When creating a shared object, we must copy these |
| 11014 | reloc types into the output file. We create a reloc |
| 11015 | section in dynobj and make room for this reloc. */ |
| 11016 | if (sreloc == NULL) |
| 11017 | { |
| 11018 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 11019 | (sec, dynobj, 2, abfd, ! htab->use_rel); |
| 11020 | |
| 11021 | if (sreloc == NULL) |
| 11022 | return FALSE; |
| 11023 | |
| 11024 | /* BPABI objects never have dynamic relocations mapped. */ |
| 11025 | if (htab->symbian_p) |
| 11026 | { |
| 11027 | flagword flags; |
| 11028 | |
| 11029 | flags = bfd_get_section_flags (dynobj, sreloc); |
| 11030 | flags &= ~(SEC_LOAD | SEC_ALLOC); |
| 11031 | bfd_set_section_flags (dynobj, sreloc, flags); |
| 11032 | } |
| 11033 | } |
| 11034 | |
| 11035 | /* If this is a global symbol, we count the number of |
| 11036 | relocations we need for this symbol. */ |
| 11037 | if (h != NULL) |
| 11038 | { |
| 11039 | head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied; |
| 11040 | } |
| 11041 | else |
| 11042 | { |
| 11043 | /* Track dynamic relocs needed for local syms too. |
| 11044 | We really need local syms available to do this |
| 11045 | easily. Oh well. */ |
| 11046 | asection *s; |
| 11047 | void *vpp; |
| 11048 | Elf_Internal_Sym *isym; |
| 11049 | |
| 11050 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 11051 | abfd, r_symndx); |
| 11052 | if (isym == NULL) |
| 11053 | return FALSE; |
| 11054 | |
| 11055 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 11056 | if (s == NULL) |
| 11057 | s = sec; |
| 11058 | |
| 11059 | vpp = &elf_section_data (s)->local_dynrel; |
| 11060 | head = (struct elf32_arm_relocs_copied **) vpp; |
| 11061 | } |
| 11062 | |
| 11063 | p = *head; |
| 11064 | if (p == NULL || p->section != sec) |
| 11065 | { |
| 11066 | bfd_size_type amt = sizeof *p; |
| 11067 | |
| 11068 | p = (struct elf32_arm_relocs_copied *) |
| 11069 | bfd_alloc (htab->root.dynobj, amt); |
| 11070 | if (p == NULL) |
| 11071 | return FALSE; |
| 11072 | p->next = *head; |
| 11073 | *head = p; |
| 11074 | p->section = sec; |
| 11075 | p->count = 0; |
| 11076 | p->pc_count = 0; |
| 11077 | } |
| 11078 | |
| 11079 | if (r_type == R_ARM_REL32 || r_type == R_ARM_REL32_NOI) |
| 11080 | p->pc_count += 1; |
| 11081 | p->count += 1; |
| 11082 | } |
| 11083 | break; |
| 11084 | |
| 11085 | /* This relocation describes the C++ object vtable hierarchy. |
| 11086 | Reconstruct it for later use during GC. */ |
| 11087 | case R_ARM_GNU_VTINHERIT: |
| 11088 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 11089 | return FALSE; |
| 11090 | break; |
| 11091 | |
| 11092 | /* This relocation describes which C++ vtable entries are actually |
| 11093 | used. Record for later use during GC. */ |
| 11094 | case R_ARM_GNU_VTENTRY: |
| 11095 | BFD_ASSERT (h != NULL); |
| 11096 | if (h != NULL |
| 11097 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
| 11098 | return FALSE; |
| 11099 | break; |
| 11100 | } |
| 11101 | } |
| 11102 | |
| 11103 | return TRUE; |
| 11104 | } |
| 11105 | |
| 11106 | /* Unwinding tables are not referenced directly. This pass marks them as |
| 11107 | required if the corresponding code section is marked. */ |
| 11108 | |
| 11109 | static bfd_boolean |
| 11110 | elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info, |
| 11111 | elf_gc_mark_hook_fn gc_mark_hook) |
| 11112 | { |
| 11113 | bfd *sub; |
| 11114 | Elf_Internal_Shdr **elf_shdrp; |
| 11115 | bfd_boolean again; |
| 11116 | |
| 11117 | /* Marking EH data may cause additional code sections to be marked, |
| 11118 | requiring multiple passes. */ |
| 11119 | again = TRUE; |
| 11120 | while (again) |
| 11121 | { |
| 11122 | again = FALSE; |
| 11123 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
| 11124 | { |
| 11125 | asection *o; |
| 11126 | |
| 11127 | if (! is_arm_elf (sub)) |
| 11128 | continue; |
| 11129 | |
| 11130 | elf_shdrp = elf_elfsections (sub); |
| 11131 | for (o = sub->sections; o != NULL; o = o->next) |
| 11132 | { |
| 11133 | Elf_Internal_Shdr *hdr; |
| 11134 | |
| 11135 | hdr = &elf_section_data (o)->this_hdr; |
| 11136 | if (hdr->sh_type == SHT_ARM_EXIDX |
| 11137 | && hdr->sh_link |
| 11138 | && hdr->sh_link < elf_numsections (sub) |
| 11139 | && !o->gc_mark |
| 11140 | && elf_shdrp[hdr->sh_link]->bfd_section->gc_mark) |
| 11141 | { |
| 11142 | again = TRUE; |
| 11143 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) |
| 11144 | return FALSE; |
| 11145 | } |
| 11146 | } |
| 11147 | } |
| 11148 | } |
| 11149 | |
| 11150 | return TRUE; |
| 11151 | } |
| 11152 | |
| 11153 | /* Treat mapping symbols as special target symbols. */ |
| 11154 | |
| 11155 | static bfd_boolean |
| 11156 | elf32_arm_is_target_special_symbol (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym) |
| 11157 | { |
| 11158 | return bfd_is_arm_special_symbol_name (sym->name, |
| 11159 | BFD_ARM_SPECIAL_SYM_TYPE_ANY); |
| 11160 | } |
| 11161 | |
| 11162 | /* This is a copy of elf_find_function() from elf.c except that |
| 11163 | ARM mapping symbols are ignored when looking for function names |
| 11164 | and STT_ARM_TFUNC is considered to a function type. */ |
| 11165 | |
| 11166 | static bfd_boolean |
| 11167 | arm_elf_find_function (bfd * abfd ATTRIBUTE_UNUSED, |
| 11168 | asection * section, |
| 11169 | asymbol ** symbols, |
| 11170 | bfd_vma offset, |
| 11171 | const char ** filename_ptr, |
| 11172 | const char ** functionname_ptr) |
| 11173 | { |
| 11174 | const char * filename = NULL; |
| 11175 | asymbol * func = NULL; |
| 11176 | bfd_vma low_func = 0; |
| 11177 | asymbol ** p; |
| 11178 | |
| 11179 | for (p = symbols; *p != NULL; p++) |
| 11180 | { |
| 11181 | elf_symbol_type *q; |
| 11182 | |
| 11183 | q = (elf_symbol_type *) *p; |
| 11184 | |
| 11185 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) |
| 11186 | { |
| 11187 | default: |
| 11188 | break; |
| 11189 | case STT_FILE: |
| 11190 | filename = bfd_asymbol_name (&q->symbol); |
| 11191 | break; |
| 11192 | case STT_FUNC: |
| 11193 | case STT_ARM_TFUNC: |
| 11194 | case STT_NOTYPE: |
| 11195 | /* Skip mapping symbols. */ |
| 11196 | if ((q->symbol.flags & BSF_LOCAL) |
| 11197 | && bfd_is_arm_special_symbol_name (q->symbol.name, |
| 11198 | BFD_ARM_SPECIAL_SYM_TYPE_ANY)) |
| 11199 | continue; |
| 11200 | /* Fall through. */ |
| 11201 | if (bfd_get_section (&q->symbol) == section |
| 11202 | && q->symbol.value >= low_func |
| 11203 | && q->symbol.value <= offset) |
| 11204 | { |
| 11205 | func = (asymbol *) q; |
| 11206 | low_func = q->symbol.value; |
| 11207 | } |
| 11208 | break; |
| 11209 | } |
| 11210 | } |
| 11211 | |
| 11212 | if (func == NULL) |
| 11213 | return FALSE; |
| 11214 | |
| 11215 | if (filename_ptr) |
| 11216 | *filename_ptr = filename; |
| 11217 | if (functionname_ptr) |
| 11218 | *functionname_ptr = bfd_asymbol_name (func); |
| 11219 | |
| 11220 | return TRUE; |
| 11221 | } |
| 11222 | |
| 11223 | |
| 11224 | /* Find the nearest line to a particular section and offset, for error |
| 11225 | reporting. This code is a duplicate of the code in elf.c, except |
| 11226 | that it uses arm_elf_find_function. */ |
| 11227 | |
| 11228 | static bfd_boolean |
| 11229 | elf32_arm_find_nearest_line (bfd * abfd, |
| 11230 | asection * section, |
| 11231 | asymbol ** symbols, |
| 11232 | bfd_vma offset, |
| 11233 | const char ** filename_ptr, |
| 11234 | const char ** functionname_ptr, |
| 11235 | unsigned int * line_ptr) |
| 11236 | { |
| 11237 | bfd_boolean found = FALSE; |
| 11238 | |
| 11239 | /* We skip _bfd_dwarf1_find_nearest_line since no known ARM toolchain uses it. */ |
| 11240 | |
| 11241 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, |
| 11242 | filename_ptr, functionname_ptr, |
| 11243 | line_ptr, 0, |
| 11244 | & elf_tdata (abfd)->dwarf2_find_line_info)) |
| 11245 | { |
| 11246 | if (!*functionname_ptr) |
| 11247 | arm_elf_find_function (abfd, section, symbols, offset, |
| 11248 | *filename_ptr ? NULL : filename_ptr, |
| 11249 | functionname_ptr); |
| 11250 | |
| 11251 | return TRUE; |
| 11252 | } |
| 11253 | |
| 11254 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
| 11255 | & found, filename_ptr, |
| 11256 | functionname_ptr, line_ptr, |
| 11257 | & elf_tdata (abfd)->line_info)) |
| 11258 | return FALSE; |
| 11259 | |
| 11260 | if (found && (*functionname_ptr || *line_ptr)) |
| 11261 | return TRUE; |
| 11262 | |
| 11263 | if (symbols == NULL) |
| 11264 | return FALSE; |
| 11265 | |
| 11266 | if (! arm_elf_find_function (abfd, section, symbols, offset, |
| 11267 | filename_ptr, functionname_ptr)) |
| 11268 | return FALSE; |
| 11269 | |
| 11270 | *line_ptr = 0; |
| 11271 | return TRUE; |
| 11272 | } |
| 11273 | |
| 11274 | static bfd_boolean |
| 11275 | elf32_arm_find_inliner_info (bfd * abfd, |
| 11276 | const char ** filename_ptr, |
| 11277 | const char ** functionname_ptr, |
| 11278 | unsigned int * line_ptr) |
| 11279 | { |
| 11280 | bfd_boolean found; |
| 11281 | found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr, |
| 11282 | functionname_ptr, line_ptr, |
| 11283 | & elf_tdata (abfd)->dwarf2_find_line_info); |
| 11284 | return found; |
| 11285 | } |
| 11286 | |
| 11287 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 11288 | regular object. The current definition is in some section of the |
| 11289 | dynamic object, but we're not including those sections. We have to |
| 11290 | change the definition to something the rest of the link can |
| 11291 | understand. */ |
| 11292 | |
| 11293 | static bfd_boolean |
| 11294 | elf32_arm_adjust_dynamic_symbol (struct bfd_link_info * info, |
| 11295 | struct elf_link_hash_entry * h) |
| 11296 | { |
| 11297 | bfd * dynobj; |
| 11298 | asection * s; |
| 11299 | struct elf32_arm_link_hash_entry * eh; |
| 11300 | struct elf32_arm_link_hash_table *globals; |
| 11301 | |
| 11302 | globals = elf32_arm_hash_table (info); |
| 11303 | if (globals == NULL) |
| 11304 | return FALSE; |
| 11305 | |
| 11306 | dynobj = elf_hash_table (info)->dynobj; |
| 11307 | |
| 11308 | /* Make sure we know what is going on here. */ |
| 11309 | BFD_ASSERT (dynobj != NULL |
| 11310 | && (h->needs_plt |
| 11311 | || h->u.weakdef != NULL |
| 11312 | || (h->def_dynamic |
| 11313 | && h->ref_regular |
| 11314 | && !h->def_regular))); |
| 11315 | |
| 11316 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 11317 | |
| 11318 | /* If this is a function, put it in the procedure linkage table. We |
| 11319 | will fill in the contents of the procedure linkage table later, |
| 11320 | when we know the address of the .got section. */ |
| 11321 | if (h->type == STT_FUNC || h->type == STT_ARM_TFUNC |
| 11322 | || h->needs_plt) |
| 11323 | { |
| 11324 | if (h->plt.refcount <= 0 |
| 11325 | || SYMBOL_CALLS_LOCAL (info, h) |
| 11326 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 11327 | && h->root.type == bfd_link_hash_undefweak)) |
| 11328 | { |
| 11329 | /* This case can occur if we saw a PLT32 reloc in an input |
| 11330 | file, but the symbol was never referred to by a dynamic |
| 11331 | object, or if all references were garbage collected. In |
| 11332 | such a case, we don't actually need to build a procedure |
| 11333 | linkage table, and we can just do a PC24 reloc instead. */ |
| 11334 | h->plt.offset = (bfd_vma) -1; |
| 11335 | eh->plt_thumb_refcount = 0; |
| 11336 | eh->plt_maybe_thumb_refcount = 0; |
| 11337 | h->needs_plt = 0; |
| 11338 | } |
| 11339 | |
| 11340 | return TRUE; |
| 11341 | } |
| 11342 | else |
| 11343 | { |
| 11344 | /* It's possible that we incorrectly decided a .plt reloc was |
| 11345 | needed for an R_ARM_PC24 or similar reloc to a non-function sym |
| 11346 | in check_relocs. We can't decide accurately between function |
| 11347 | and non-function syms in check-relocs; Objects loaded later in |
| 11348 | the link may change h->type. So fix it now. */ |
| 11349 | h->plt.offset = (bfd_vma) -1; |
| 11350 | eh->plt_thumb_refcount = 0; |
| 11351 | eh->plt_maybe_thumb_refcount = 0; |
| 11352 | } |
| 11353 | |
| 11354 | /* If this is a weak symbol, and there is a real definition, the |
| 11355 | processor independent code will have arranged for us to see the |
| 11356 | real definition first, and we can just use the same value. */ |
| 11357 | if (h->u.weakdef != NULL) |
| 11358 | { |
| 11359 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
| 11360 | || h->u.weakdef->root.type == bfd_link_hash_defweak); |
| 11361 | h->root.u.def.section = h->u.weakdef->root.u.def.section; |
| 11362 | h->root.u.def.value = h->u.weakdef->root.u.def.value; |
| 11363 | return TRUE; |
| 11364 | } |
| 11365 | |
| 11366 | /* If there are no non-GOT references, we do not need a copy |
| 11367 | relocation. */ |
| 11368 | if (!h->non_got_ref) |
| 11369 | return TRUE; |
| 11370 | |
| 11371 | /* This is a reference to a symbol defined by a dynamic object which |
| 11372 | is not a function. */ |
| 11373 | |
| 11374 | /* If we are creating a shared library, we must presume that the |
| 11375 | only references to the symbol are via the global offset table. |
| 11376 | For such cases we need not do anything here; the relocations will |
| 11377 | be handled correctly by relocate_section. Relocatable executables |
| 11378 | can reference data in shared objects directly, so we don't need to |
| 11379 | do anything here. */ |
| 11380 | if (info->shared || globals->root.is_relocatable_executable) |
| 11381 | return TRUE; |
| 11382 | |
| 11383 | if (h->size == 0) |
| 11384 | { |
| 11385 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), |
| 11386 | h->root.root.string); |
| 11387 | return TRUE; |
| 11388 | } |
| 11389 | |
| 11390 | /* We must allocate the symbol in our .dynbss section, which will |
| 11391 | become part of the .bss section of the executable. There will be |
| 11392 | an entry for this symbol in the .dynsym section. The dynamic |
| 11393 | object will contain position independent code, so all references |
| 11394 | from the dynamic object to this symbol will go through the global |
| 11395 | offset table. The dynamic linker will use the .dynsym entry to |
| 11396 | determine the address it must put in the global offset table, so |
| 11397 | both the dynamic object and the regular object will refer to the |
| 11398 | same memory location for the variable. */ |
| 11399 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 11400 | BFD_ASSERT (s != NULL); |
| 11401 | |
| 11402 | /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to |
| 11403 | copy the initial value out of the dynamic object and into the |
| 11404 | runtime process image. We need to remember the offset into the |
| 11405 | .rel(a).bss section we are going to use. */ |
| 11406 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 11407 | { |
| 11408 | asection *srel; |
| 11409 | |
| 11410 | srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (globals, ".bss")); |
| 11411 | BFD_ASSERT (srel != NULL); |
| 11412 | srel->size += RELOC_SIZE (globals); |
| 11413 | h->needs_copy = 1; |
| 11414 | } |
| 11415 | |
| 11416 | return _bfd_elf_adjust_dynamic_copy (h, s); |
| 11417 | } |
| 11418 | |
| 11419 | /* Allocate space in .plt, .got and associated reloc sections for |
| 11420 | dynamic relocs. */ |
| 11421 | |
| 11422 | static bfd_boolean |
| 11423 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
| 11424 | { |
| 11425 | struct bfd_link_info *info; |
| 11426 | struct elf32_arm_link_hash_table *htab; |
| 11427 | struct elf32_arm_link_hash_entry *eh; |
| 11428 | struct elf32_arm_relocs_copied *p; |
| 11429 | bfd_signed_vma thumb_refs; |
| 11430 | |
| 11431 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 11432 | |
| 11433 | if (h->root.type == bfd_link_hash_indirect) |
| 11434 | return TRUE; |
| 11435 | |
| 11436 | if (h->root.type == bfd_link_hash_warning) |
| 11437 | /* When warning symbols are created, they **replace** the "real" |
| 11438 | entry in the hash table, thus we never get to see the real |
| 11439 | symbol in a hash traversal. So look at it now. */ |
| 11440 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 11441 | |
| 11442 | info = (struct bfd_link_info *) inf; |
| 11443 | htab = elf32_arm_hash_table (info); |
| 11444 | if (htab == NULL) |
| 11445 | return FALSE; |
| 11446 | |
| 11447 | if (htab->root.dynamic_sections_created |
| 11448 | && h->plt.refcount > 0) |
| 11449 | { |
| 11450 | /* Make sure this symbol is output as a dynamic symbol. |
| 11451 | Undefined weak syms won't yet be marked as dynamic. */ |
| 11452 | if (h->dynindx == -1 |
| 11453 | && !h->forced_local) |
| 11454 | { |
| 11455 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 11456 | return FALSE; |
| 11457 | } |
| 11458 | |
| 11459 | if (info->shared |
| 11460 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 11461 | { |
| 11462 | asection *s = htab->splt; |
| 11463 | |
| 11464 | /* If this is the first .plt entry, make room for the special |
| 11465 | first entry. */ |
| 11466 | if (s->size == 0) |
| 11467 | s->size += htab->plt_header_size; |
| 11468 | |
| 11469 | h->plt.offset = s->size; |
| 11470 | |
| 11471 | /* If we will insert a Thumb trampoline before this PLT, leave room |
| 11472 | for it. */ |
| 11473 | thumb_refs = eh->plt_thumb_refcount; |
| 11474 | if (!htab->use_blx) |
| 11475 | thumb_refs += eh->plt_maybe_thumb_refcount; |
| 11476 | |
| 11477 | if (thumb_refs > 0) |
| 11478 | { |
| 11479 | h->plt.offset += PLT_THUMB_STUB_SIZE; |
| 11480 | s->size += PLT_THUMB_STUB_SIZE; |
| 11481 | } |
| 11482 | |
| 11483 | /* If this symbol is not defined in a regular file, and we are |
| 11484 | not generating a shared library, then set the symbol to this |
| 11485 | location in the .plt. This is required to make function |
| 11486 | pointers compare as equal between the normal executable and |
| 11487 | the shared library. */ |
| 11488 | if (! info->shared |
| 11489 | && !h->def_regular) |
| 11490 | { |
| 11491 | h->root.u.def.section = s; |
| 11492 | h->root.u.def.value = h->plt.offset; |
| 11493 | |
| 11494 | /* Make sure the function is not marked as Thumb, in case |
| 11495 | it is the target of an ABS32 relocation, which will |
| 11496 | point to the PLT entry. */ |
| 11497 | if (ELF_ST_TYPE (h->type) == STT_ARM_TFUNC) |
| 11498 | h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC); |
| 11499 | } |
| 11500 | |
| 11501 | /* Make room for this entry. */ |
| 11502 | s->size += htab->plt_entry_size; |
| 11503 | |
| 11504 | if (!htab->symbian_p) |
| 11505 | { |
| 11506 | /* We also need to make an entry in the .got.plt section, which |
| 11507 | will be placed in the .got section by the linker script. */ |
| 11508 | eh->plt_got_offset = htab->sgotplt->size; |
| 11509 | htab->sgotplt->size += 4; |
| 11510 | } |
| 11511 | |
| 11512 | /* We also need to make an entry in the .rel(a).plt section. */ |
| 11513 | htab->srelplt->size += RELOC_SIZE (htab); |
| 11514 | |
| 11515 | /* VxWorks executables have a second set of relocations for |
| 11516 | each PLT entry. They go in a separate relocation section, |
| 11517 | which is processed by the kernel loader. */ |
| 11518 | if (htab->vxworks_p && !info->shared) |
| 11519 | { |
| 11520 | /* There is a relocation for the initial PLT entry: |
| 11521 | an R_ARM_32 relocation for _GLOBAL_OFFSET_TABLE_. */ |
| 11522 | if (h->plt.offset == htab->plt_header_size) |
| 11523 | htab->srelplt2->size += RELOC_SIZE (htab); |
| 11524 | |
| 11525 | /* There are two extra relocations for each subsequent |
| 11526 | PLT entry: an R_ARM_32 relocation for the GOT entry, |
| 11527 | and an R_ARM_32 relocation for the PLT entry. */ |
| 11528 | htab->srelplt2->size += RELOC_SIZE (htab) * 2; |
| 11529 | } |
| 11530 | } |
| 11531 | else |
| 11532 | { |
| 11533 | h->plt.offset = (bfd_vma) -1; |
| 11534 | h->needs_plt = 0; |
| 11535 | } |
| 11536 | } |
| 11537 | else |
| 11538 | { |
| 11539 | h->plt.offset = (bfd_vma) -1; |
| 11540 | h->needs_plt = 0; |
| 11541 | } |
| 11542 | |
| 11543 | if (h->got.refcount > 0) |
| 11544 | { |
| 11545 | asection *s; |
| 11546 | bfd_boolean dyn; |
| 11547 | int tls_type = elf32_arm_hash_entry (h)->tls_type; |
| 11548 | int indx; |
| 11549 | |
| 11550 | /* Make sure this symbol is output as a dynamic symbol. |
| 11551 | Undefined weak syms won't yet be marked as dynamic. */ |
| 11552 | if (h->dynindx == -1 |
| 11553 | && !h->forced_local) |
| 11554 | { |
| 11555 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 11556 | return FALSE; |
| 11557 | } |
| 11558 | |
| 11559 | if (!htab->symbian_p) |
| 11560 | { |
| 11561 | s = htab->sgot; |
| 11562 | h->got.offset = s->size; |
| 11563 | |
| 11564 | if (tls_type == GOT_UNKNOWN) |
| 11565 | abort (); |
| 11566 | |
| 11567 | if (tls_type == GOT_NORMAL) |
| 11568 | /* Non-TLS symbols need one GOT slot. */ |
| 11569 | s->size += 4; |
| 11570 | else |
| 11571 | { |
| 11572 | if (tls_type & GOT_TLS_GD) |
| 11573 | /* R_ARM_TLS_GD32 needs 2 consecutive GOT slots. */ |
| 11574 | s->size += 8; |
| 11575 | if (tls_type & GOT_TLS_IE) |
| 11576 | /* R_ARM_TLS_IE32 needs one GOT slot. */ |
| 11577 | s->size += 4; |
| 11578 | } |
| 11579 | |
| 11580 | dyn = htab->root.dynamic_sections_created; |
| 11581 | |
| 11582 | indx = 0; |
| 11583 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| 11584 | && (!info->shared |
| 11585 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 11586 | indx = h->dynindx; |
| 11587 | |
| 11588 | if (tls_type != GOT_NORMAL |
| 11589 | && (info->shared || indx != 0) |
| 11590 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 11591 | || h->root.type != bfd_link_hash_undefweak)) |
| 11592 | { |
| 11593 | if (tls_type & GOT_TLS_IE) |
| 11594 | htab->srelgot->size += RELOC_SIZE (htab); |
| 11595 | |
| 11596 | if (tls_type & GOT_TLS_GD) |
| 11597 | htab->srelgot->size += RELOC_SIZE (htab); |
| 11598 | |
| 11599 | if ((tls_type & GOT_TLS_GD) && indx != 0) |
| 11600 | htab->srelgot->size += RELOC_SIZE (htab); |
| 11601 | } |
| 11602 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 11603 | || h->root.type != bfd_link_hash_undefweak) |
| 11604 | && (info->shared |
| 11605 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
| 11606 | htab->srelgot->size += RELOC_SIZE (htab); |
| 11607 | } |
| 11608 | } |
| 11609 | else |
| 11610 | h->got.offset = (bfd_vma) -1; |
| 11611 | |
| 11612 | /* Allocate stubs for exported Thumb functions on v4t. */ |
| 11613 | if (!htab->use_blx && h->dynindx != -1 |
| 11614 | && h->def_regular |
| 11615 | && ELF_ST_TYPE (h->type) == STT_ARM_TFUNC |
| 11616 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 11617 | { |
| 11618 | struct elf_link_hash_entry * th; |
| 11619 | struct bfd_link_hash_entry * bh; |
| 11620 | struct elf_link_hash_entry * myh; |
| 11621 | char name[1024]; |
| 11622 | asection *s; |
| 11623 | bh = NULL; |
| 11624 | /* Create a new symbol to regist the real location of the function. */ |
| 11625 | s = h->root.u.def.section; |
| 11626 | sprintf (name, "__real_%s", h->root.root.string); |
| 11627 | _bfd_generic_link_add_one_symbol (info, s->owner, |
| 11628 | name, BSF_GLOBAL, s, |
| 11629 | h->root.u.def.value, |
| 11630 | NULL, TRUE, FALSE, &bh); |
| 11631 | |
| 11632 | myh = (struct elf_link_hash_entry *) bh; |
| 11633 | myh->type = ELF_ST_INFO (STB_LOCAL, STT_ARM_TFUNC); |
| 11634 | myh->forced_local = 1; |
| 11635 | eh->export_glue = myh; |
| 11636 | th = record_arm_to_thumb_glue (info, h); |
| 11637 | /* Point the symbol at the stub. */ |
| 11638 | h->type = ELF_ST_INFO (ELF_ST_BIND (h->type), STT_FUNC); |
| 11639 | h->root.u.def.section = th->root.u.def.section; |
| 11640 | h->root.u.def.value = th->root.u.def.value & ~1; |
| 11641 | } |
| 11642 | |
| 11643 | if (eh->relocs_copied == NULL) |
| 11644 | return TRUE; |
| 11645 | |
| 11646 | /* In the shared -Bsymbolic case, discard space allocated for |
| 11647 | dynamic pc-relative relocs against symbols which turn out to be |
| 11648 | defined in regular objects. For the normal shared case, discard |
| 11649 | space for pc-relative relocs that have become local due to symbol |
| 11650 | visibility changes. */ |
| 11651 | |
| 11652 | if (info->shared || htab->root.is_relocatable_executable) |
| 11653 | { |
| 11654 | /* The only relocs that use pc_count are R_ARM_REL32 and |
| 11655 | R_ARM_REL32_NOI, which will appear on something like |
| 11656 | ".long foo - .". We want calls to protected symbols to resolve |
| 11657 | directly to the function rather than going via the plt. If people |
| 11658 | want function pointer comparisons to work as expected then they |
| 11659 | should avoid writing assembly like ".long foo - .". */ |
| 11660 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 11661 | { |
| 11662 | struct elf32_arm_relocs_copied **pp; |
| 11663 | |
| 11664 | for (pp = &eh->relocs_copied; (p = *pp) != NULL; ) |
| 11665 | { |
| 11666 | p->count -= p->pc_count; |
| 11667 | p->pc_count = 0; |
| 11668 | if (p->count == 0) |
| 11669 | *pp = p->next; |
| 11670 | else |
| 11671 | pp = &p->next; |
| 11672 | } |
| 11673 | } |
| 11674 | |
| 11675 | if (htab->vxworks_p) |
| 11676 | { |
| 11677 | struct elf32_arm_relocs_copied **pp; |
| 11678 | |
| 11679 | for (pp = &eh->relocs_copied; (p = *pp) != NULL; ) |
| 11680 | { |
| 11681 | if (strcmp (p->section->output_section->name, ".tls_vars") == 0) |
| 11682 | *pp = p->next; |
| 11683 | else |
| 11684 | pp = &p->next; |
| 11685 | } |
| 11686 | } |
| 11687 | |
| 11688 | /* Also discard relocs on undefined weak syms with non-default |
| 11689 | visibility. */ |
| 11690 | if (eh->relocs_copied != NULL |
| 11691 | && h->root.type == bfd_link_hash_undefweak) |
| 11692 | { |
| 11693 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| 11694 | eh->relocs_copied = NULL; |
| 11695 | |
| 11696 | /* Make sure undefined weak symbols are output as a dynamic |
| 11697 | symbol in PIEs. */ |
| 11698 | else if (h->dynindx == -1 |
| 11699 | && !h->forced_local) |
| 11700 | { |
| 11701 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 11702 | return FALSE; |
| 11703 | } |
| 11704 | } |
| 11705 | |
| 11706 | else if (htab->root.is_relocatable_executable && h->dynindx == -1 |
| 11707 | && h->root.type == bfd_link_hash_new) |
| 11708 | { |
| 11709 | /* Output absolute symbols so that we can create relocations |
| 11710 | against them. For normal symbols we output a relocation |
| 11711 | against the section that contains them. */ |
| 11712 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 11713 | return FALSE; |
| 11714 | } |
| 11715 | |
| 11716 | } |
| 11717 | else |
| 11718 | { |
| 11719 | /* For the non-shared case, discard space for relocs against |
| 11720 | symbols which turn out to need copy relocs or are not |
| 11721 | dynamic. */ |
| 11722 | |
| 11723 | if (!h->non_got_ref |
| 11724 | && ((h->def_dynamic |
| 11725 | && !h->def_regular) |
| 11726 | || (htab->root.dynamic_sections_created |
| 11727 | && (h->root.type == bfd_link_hash_undefweak |
| 11728 | || h->root.type == bfd_link_hash_undefined)))) |
| 11729 | { |
| 11730 | /* Make sure this symbol is output as a dynamic symbol. |
| 11731 | Undefined weak syms won't yet be marked as dynamic. */ |
| 11732 | if (h->dynindx == -1 |
| 11733 | && !h->forced_local) |
| 11734 | { |
| 11735 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 11736 | return FALSE; |
| 11737 | } |
| 11738 | |
| 11739 | /* If that succeeded, we know we'll be keeping all the |
| 11740 | relocs. */ |
| 11741 | if (h->dynindx != -1) |
| 11742 | goto keep; |
| 11743 | } |
| 11744 | |
| 11745 | eh->relocs_copied = NULL; |
| 11746 | |
| 11747 | keep: ; |
| 11748 | } |
| 11749 | |
| 11750 | /* Finally, allocate space. */ |
| 11751 | for (p = eh->relocs_copied; p != NULL; p = p->next) |
| 11752 | { |
| 11753 | asection *sreloc = elf_section_data (p->section)->sreloc; |
| 11754 | sreloc->size += p->count * RELOC_SIZE (htab); |
| 11755 | } |
| 11756 | |
| 11757 | return TRUE; |
| 11758 | } |
| 11759 | |
| 11760 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 11761 | |
| 11762 | static bfd_boolean |
| 11763 | elf32_arm_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf) |
| 11764 | { |
| 11765 | struct elf32_arm_link_hash_entry * eh; |
| 11766 | struct elf32_arm_relocs_copied * p; |
| 11767 | |
| 11768 | if (h->root.type == bfd_link_hash_warning) |
| 11769 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 11770 | |
| 11771 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 11772 | for (p = eh->relocs_copied; p != NULL; p = p->next) |
| 11773 | { |
| 11774 | asection *s = p->section; |
| 11775 | |
| 11776 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 11777 | { |
| 11778 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| 11779 | |
| 11780 | info->flags |= DF_TEXTREL; |
| 11781 | |
| 11782 | /* Not an error, just cut short the traversal. */ |
| 11783 | return FALSE; |
| 11784 | } |
| 11785 | } |
| 11786 | return TRUE; |
| 11787 | } |
| 11788 | |
| 11789 | void |
| 11790 | bfd_elf32_arm_set_byteswap_code (struct bfd_link_info *info, |
| 11791 | int byteswap_code) |
| 11792 | { |
| 11793 | struct elf32_arm_link_hash_table *globals; |
| 11794 | |
| 11795 | globals = elf32_arm_hash_table (info); |
| 11796 | if (globals == NULL) |
| 11797 | return; |
| 11798 | |
| 11799 | globals->byteswap_code = byteswap_code; |
| 11800 | } |
| 11801 | |
| 11802 | /* Set the sizes of the dynamic sections. */ |
| 11803 | |
| 11804 | static bfd_boolean |
| 11805 | elf32_arm_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 11806 | struct bfd_link_info * info) |
| 11807 | { |
| 11808 | bfd * dynobj; |
| 11809 | asection * s; |
| 11810 | bfd_boolean plt; |
| 11811 | bfd_boolean relocs; |
| 11812 | bfd *ibfd; |
| 11813 | struct elf32_arm_link_hash_table *htab; |
| 11814 | |
| 11815 | htab = elf32_arm_hash_table (info); |
| 11816 | if (htab == NULL) |
| 11817 | return FALSE; |
| 11818 | |
| 11819 | dynobj = elf_hash_table (info)->dynobj; |
| 11820 | BFD_ASSERT (dynobj != NULL); |
| 11821 | check_use_blx (htab); |
| 11822 | |
| 11823 | if (elf_hash_table (info)->dynamic_sections_created) |
| 11824 | { |
| 11825 | /* Set the contents of the .interp section to the interpreter. */ |
| 11826 | if (info->executable) |
| 11827 | { |
| 11828 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 11829 | BFD_ASSERT (s != NULL); |
| 11830 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 11831 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 11832 | } |
| 11833 | } |
| 11834 | |
| 11835 | /* Set up .got offsets for local syms, and space for local dynamic |
| 11836 | relocs. */ |
| 11837 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 11838 | { |
| 11839 | bfd_signed_vma *local_got; |
| 11840 | bfd_signed_vma *end_local_got; |
| 11841 | char *local_tls_type; |
| 11842 | bfd_size_type locsymcount; |
| 11843 | Elf_Internal_Shdr *symtab_hdr; |
| 11844 | asection *srel; |
| 11845 | bfd_boolean is_vxworks = htab->vxworks_p; |
| 11846 | |
| 11847 | if (! is_arm_elf (ibfd)) |
| 11848 | continue; |
| 11849 | |
| 11850 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 11851 | { |
| 11852 | struct elf32_arm_relocs_copied *p; |
| 11853 | |
| 11854 | for (p = (struct elf32_arm_relocs_copied *) |
| 11855 | elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
| 11856 | { |
| 11857 | if (!bfd_is_abs_section (p->section) |
| 11858 | && bfd_is_abs_section (p->section->output_section)) |
| 11859 | { |
| 11860 | /* Input section has been discarded, either because |
| 11861 | it is a copy of a linkonce section or due to |
| 11862 | linker script /DISCARD/, so we'll be discarding |
| 11863 | the relocs too. */ |
| 11864 | } |
| 11865 | else if (is_vxworks |
| 11866 | && strcmp (p->section->output_section->name, |
| 11867 | ".tls_vars") == 0) |
| 11868 | { |
| 11869 | /* Relocations in vxworks .tls_vars sections are |
| 11870 | handled specially by the loader. */ |
| 11871 | } |
| 11872 | else if (p->count != 0) |
| 11873 | { |
| 11874 | srel = elf_section_data (p->section)->sreloc; |
| 11875 | srel->size += p->count * RELOC_SIZE (htab); |
| 11876 | if ((p->section->output_section->flags & SEC_READONLY) != 0) |
| 11877 | info->flags |= DF_TEXTREL; |
| 11878 | } |
| 11879 | } |
| 11880 | } |
| 11881 | |
| 11882 | local_got = elf_local_got_refcounts (ibfd); |
| 11883 | if (!local_got) |
| 11884 | continue; |
| 11885 | |
| 11886 | symtab_hdr = & elf_symtab_hdr (ibfd); |
| 11887 | locsymcount = symtab_hdr->sh_info; |
| 11888 | end_local_got = local_got + locsymcount; |
| 11889 | local_tls_type = elf32_arm_local_got_tls_type (ibfd); |
| 11890 | s = htab->sgot; |
| 11891 | srel = htab->srelgot; |
| 11892 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
| 11893 | { |
| 11894 | if (*local_got > 0) |
| 11895 | { |
| 11896 | *local_got = s->size; |
| 11897 | if (*local_tls_type & GOT_TLS_GD) |
| 11898 | /* TLS_GD relocs need an 8-byte structure in the GOT. */ |
| 11899 | s->size += 8; |
| 11900 | if (*local_tls_type & GOT_TLS_IE) |
| 11901 | s->size += 4; |
| 11902 | if (*local_tls_type == GOT_NORMAL) |
| 11903 | s->size += 4; |
| 11904 | |
| 11905 | if (info->shared || *local_tls_type == GOT_TLS_GD) |
| 11906 | srel->size += RELOC_SIZE (htab); |
| 11907 | } |
| 11908 | else |
| 11909 | *local_got = (bfd_vma) -1; |
| 11910 | } |
| 11911 | } |
| 11912 | |
| 11913 | if (htab->tls_ldm_got.refcount > 0) |
| 11914 | { |
| 11915 | /* Allocate two GOT entries and one dynamic relocation (if necessary) |
| 11916 | for R_ARM_TLS_LDM32 relocations. */ |
| 11917 | htab->tls_ldm_got.offset = htab->sgot->size; |
| 11918 | htab->sgot->size += 8; |
| 11919 | if (info->shared) |
| 11920 | htab->srelgot->size += RELOC_SIZE (htab); |
| 11921 | } |
| 11922 | else |
| 11923 | htab->tls_ldm_got.offset = -1; |
| 11924 | |
| 11925 | /* Allocate global sym .plt and .got entries, and space for global |
| 11926 | sym dynamic relocs. */ |
| 11927 | elf_link_hash_traverse (& htab->root, allocate_dynrelocs, info); |
| 11928 | |
| 11929 | /* Here we rummage through the found bfds to collect glue information. */ |
| 11930 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 11931 | { |
| 11932 | if (! is_arm_elf (ibfd)) |
| 11933 | continue; |
| 11934 | |
| 11935 | /* Initialise mapping tables for code/data. */ |
| 11936 | bfd_elf32_arm_init_maps (ibfd); |
| 11937 | |
| 11938 | if (!bfd_elf32_arm_process_before_allocation (ibfd, info) |
| 11939 | || !bfd_elf32_arm_vfp11_erratum_scan (ibfd, info)) |
| 11940 | /* xgettext:c-format */ |
| 11941 | _bfd_error_handler (_("Errors encountered processing file %s"), |
| 11942 | ibfd->filename); |
| 11943 | } |
| 11944 | |
| 11945 | /* Allocate space for the glue sections now that we've sized them. */ |
| 11946 | bfd_elf32_arm_allocate_interworking_sections (info); |
| 11947 | |
| 11948 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 11949 | determined the sizes of the various dynamic sections. Allocate |
| 11950 | memory for them. */ |
| 11951 | plt = FALSE; |
| 11952 | relocs = FALSE; |
| 11953 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 11954 | { |
| 11955 | const char * name; |
| 11956 | |
| 11957 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 11958 | continue; |
| 11959 | |
| 11960 | /* It's OK to base decisions on the section name, because none |
| 11961 | of the dynobj section names depend upon the input files. */ |
| 11962 | name = bfd_get_section_name (dynobj, s); |
| 11963 | |
| 11964 | if (strcmp (name, ".plt") == 0) |
| 11965 | { |
| 11966 | /* Remember whether there is a PLT. */ |
| 11967 | plt = s->size != 0; |
| 11968 | } |
| 11969 | else if (CONST_STRNEQ (name, ".rel")) |
| 11970 | { |
| 11971 | if (s->size != 0) |
| 11972 | { |
| 11973 | /* Remember whether there are any reloc sections other |
| 11974 | than .rel(a).plt and .rela.plt.unloaded. */ |
| 11975 | if (s != htab->srelplt && s != htab->srelplt2) |
| 11976 | relocs = TRUE; |
| 11977 | |
| 11978 | /* We use the reloc_count field as a counter if we need |
| 11979 | to copy relocs into the output file. */ |
| 11980 | s->reloc_count = 0; |
| 11981 | } |
| 11982 | } |
| 11983 | else if (! CONST_STRNEQ (name, ".got") |
| 11984 | && strcmp (name, ".dynbss") != 0) |
| 11985 | { |
| 11986 | /* It's not one of our sections, so don't allocate space. */ |
| 11987 | continue; |
| 11988 | } |
| 11989 | |
| 11990 | if (s->size == 0) |
| 11991 | { |
| 11992 | /* If we don't need this section, strip it from the |
| 11993 | output file. This is mostly to handle .rel(a).bss and |
| 11994 | .rel(a).plt. We must create both sections in |
| 11995 | create_dynamic_sections, because they must be created |
| 11996 | before the linker maps input sections to output |
| 11997 | sections. The linker does that before |
| 11998 | adjust_dynamic_symbol is called, and it is that |
| 11999 | function which decides whether anything needs to go |
| 12000 | into these sections. */ |
| 12001 | s->flags |= SEC_EXCLUDE; |
| 12002 | continue; |
| 12003 | } |
| 12004 | |
| 12005 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 12006 | continue; |
| 12007 | |
| 12008 | /* Allocate memory for the section contents. */ |
| 12009 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
| 12010 | if (s->contents == NULL) |
| 12011 | return FALSE; |
| 12012 | } |
| 12013 | |
| 12014 | if (elf_hash_table (info)->dynamic_sections_created) |
| 12015 | { |
| 12016 | /* Add some entries to the .dynamic section. We fill in the |
| 12017 | values later, in elf32_arm_finish_dynamic_sections, but we |
| 12018 | must add the entries now so that we get the correct size for |
| 12019 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 12020 | dynamic linker and used by the debugger. */ |
| 12021 | #define add_dynamic_entry(TAG, VAL) \ |
| 12022 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 12023 | |
| 12024 | if (info->executable) |
| 12025 | { |
| 12026 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 12027 | return FALSE; |
| 12028 | } |
| 12029 | |
| 12030 | if (plt) |
| 12031 | { |
| 12032 | if ( !add_dynamic_entry (DT_PLTGOT, 0) |
| 12033 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 12034 | || !add_dynamic_entry (DT_PLTREL, |
| 12035 | htab->use_rel ? DT_REL : DT_RELA) |
| 12036 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 12037 | return FALSE; |
| 12038 | } |
| 12039 | |
| 12040 | if (relocs) |
| 12041 | { |
| 12042 | if (htab->use_rel) |
| 12043 | { |
| 12044 | if (!add_dynamic_entry (DT_REL, 0) |
| 12045 | || !add_dynamic_entry (DT_RELSZ, 0) |
| 12046 | || !add_dynamic_entry (DT_RELENT, RELOC_SIZE (htab))) |
| 12047 | return FALSE; |
| 12048 | } |
| 12049 | else |
| 12050 | { |
| 12051 | if (!add_dynamic_entry (DT_RELA, 0) |
| 12052 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 12053 | || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab))) |
| 12054 | return FALSE; |
| 12055 | } |
| 12056 | } |
| 12057 | |
| 12058 | /* If any dynamic relocs apply to a read-only section, |
| 12059 | then we need a DT_TEXTREL entry. */ |
| 12060 | if ((info->flags & DF_TEXTREL) == 0) |
| 12061 | elf_link_hash_traverse (& htab->root, elf32_arm_readonly_dynrelocs, |
| 12062 | info); |
| 12063 | |
| 12064 | if ((info->flags & DF_TEXTREL) != 0) |
| 12065 | { |
| 12066 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 12067 | return FALSE; |
| 12068 | } |
| 12069 | if (htab->vxworks_p |
| 12070 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
| 12071 | return FALSE; |
| 12072 | } |
| 12073 | #undef add_dynamic_entry |
| 12074 | |
| 12075 | return TRUE; |
| 12076 | } |
| 12077 | |
| 12078 | /* Finish up dynamic symbol handling. We set the contents of various |
| 12079 | dynamic sections here. */ |
| 12080 | |
| 12081 | static bfd_boolean |
| 12082 | elf32_arm_finish_dynamic_symbol (bfd * output_bfd, |
| 12083 | struct bfd_link_info * info, |
| 12084 | struct elf_link_hash_entry * h, |
| 12085 | Elf_Internal_Sym * sym) |
| 12086 | { |
| 12087 | bfd * dynobj; |
| 12088 | struct elf32_arm_link_hash_table *htab; |
| 12089 | struct elf32_arm_link_hash_entry *eh; |
| 12090 | |
| 12091 | dynobj = elf_hash_table (info)->dynobj; |
| 12092 | htab = elf32_arm_hash_table (info); |
| 12093 | if (htab == NULL) |
| 12094 | return FALSE; |
| 12095 | |
| 12096 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 12097 | |
| 12098 | if (h->plt.offset != (bfd_vma) -1) |
| 12099 | { |
| 12100 | asection * splt; |
| 12101 | asection * srel; |
| 12102 | bfd_byte *loc; |
| 12103 | bfd_vma plt_index; |
| 12104 | Elf_Internal_Rela rel; |
| 12105 | |
| 12106 | /* This symbol has an entry in the procedure linkage table. Set |
| 12107 | it up. */ |
| 12108 | |
| 12109 | BFD_ASSERT (h->dynindx != -1); |
| 12110 | |
| 12111 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 12112 | srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".plt")); |
| 12113 | BFD_ASSERT (splt != NULL && srel != NULL); |
| 12114 | |
| 12115 | /* Fill in the entry in the procedure linkage table. */ |
| 12116 | if (htab->symbian_p) |
| 12117 | { |
| 12118 | put_arm_insn (htab, output_bfd, |
| 12119 | elf32_arm_symbian_plt_entry[0], |
| 12120 | splt->contents + h->plt.offset); |
| 12121 | bfd_put_32 (output_bfd, |
| 12122 | elf32_arm_symbian_plt_entry[1], |
| 12123 | splt->contents + h->plt.offset + 4); |
| 12124 | |
| 12125 | /* Fill in the entry in the .rel.plt section. */ |
| 12126 | rel.r_offset = (splt->output_section->vma |
| 12127 | + splt->output_offset |
| 12128 | + h->plt.offset + 4); |
| 12129 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); |
| 12130 | |
| 12131 | /* Get the index in the procedure linkage table which |
| 12132 | corresponds to this symbol. This is the index of this symbol |
| 12133 | in all the symbols for which we are making plt entries. The |
| 12134 | first entry in the procedure linkage table is reserved. */ |
| 12135 | plt_index = ((h->plt.offset - htab->plt_header_size) |
| 12136 | / htab->plt_entry_size); |
| 12137 | } |
| 12138 | else |
| 12139 | { |
| 12140 | bfd_vma got_offset, got_address, plt_address; |
| 12141 | bfd_vma got_displacement; |
| 12142 | asection * sgot; |
| 12143 | bfd_byte * ptr; |
| 12144 | |
| 12145 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 12146 | BFD_ASSERT (sgot != NULL); |
| 12147 | |
| 12148 | /* Get the offset into the .got.plt table of the entry that |
| 12149 | corresponds to this function. */ |
| 12150 | got_offset = eh->plt_got_offset; |
| 12151 | |
| 12152 | /* Get the index in the procedure linkage table which |
| 12153 | corresponds to this symbol. This is the index of this symbol |
| 12154 | in all the symbols for which we are making plt entries. The |
| 12155 | first three entries in .got.plt are reserved; after that |
| 12156 | symbols appear in the same order as in .plt. */ |
| 12157 | plt_index = (got_offset - 12) / 4; |
| 12158 | |
| 12159 | /* Calculate the address of the GOT entry. */ |
| 12160 | got_address = (sgot->output_section->vma |
| 12161 | + sgot->output_offset |
| 12162 | + got_offset); |
| 12163 | |
| 12164 | /* ...and the address of the PLT entry. */ |
| 12165 | plt_address = (splt->output_section->vma |
| 12166 | + splt->output_offset |
| 12167 | + h->plt.offset); |
| 12168 | |
| 12169 | ptr = htab->splt->contents + h->plt.offset; |
| 12170 | if (htab->vxworks_p && info->shared) |
| 12171 | { |
| 12172 | unsigned int i; |
| 12173 | bfd_vma val; |
| 12174 | |
| 12175 | for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4) |
| 12176 | { |
| 12177 | val = elf32_arm_vxworks_shared_plt_entry[i]; |
| 12178 | if (i == 2) |
| 12179 | val |= got_address - sgot->output_section->vma; |
| 12180 | if (i == 5) |
| 12181 | val |= plt_index * RELOC_SIZE (htab); |
| 12182 | if (i == 2 || i == 5) |
| 12183 | bfd_put_32 (output_bfd, val, ptr); |
| 12184 | else |
| 12185 | put_arm_insn (htab, output_bfd, val, ptr); |
| 12186 | } |
| 12187 | } |
| 12188 | else if (htab->vxworks_p) |
| 12189 | { |
| 12190 | unsigned int i; |
| 12191 | bfd_vma val; |
| 12192 | |
| 12193 | for (i = 0; i != htab->plt_entry_size / 4; i++, ptr += 4) |
| 12194 | { |
| 12195 | val = elf32_arm_vxworks_exec_plt_entry[i]; |
| 12196 | if (i == 2) |
| 12197 | val |= got_address; |
| 12198 | if (i == 4) |
| 12199 | val |= 0xffffff & -((h->plt.offset + i * 4 + 8) >> 2); |
| 12200 | if (i == 5) |
| 12201 | val |= plt_index * RELOC_SIZE (htab); |
| 12202 | if (i == 2 || i == 5) |
| 12203 | bfd_put_32 (output_bfd, val, ptr); |
| 12204 | else |
| 12205 | put_arm_insn (htab, output_bfd, val, ptr); |
| 12206 | } |
| 12207 | |
| 12208 | loc = (htab->srelplt2->contents |
| 12209 | + (plt_index * 2 + 1) * RELOC_SIZE (htab)); |
| 12210 | |
| 12211 | /* Create the .rela.plt.unloaded R_ARM_ABS32 relocation |
| 12212 | referencing the GOT for this PLT entry. */ |
| 12213 | rel.r_offset = plt_address + 8; |
| 12214 | rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); |
| 12215 | rel.r_addend = got_offset; |
| 12216 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); |
| 12217 | loc += RELOC_SIZE (htab); |
| 12218 | |
| 12219 | /* Create the R_ARM_ABS32 relocation referencing the |
| 12220 | beginning of the PLT for this GOT entry. */ |
| 12221 | rel.r_offset = got_address; |
| 12222 | rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32); |
| 12223 | rel.r_addend = 0; |
| 12224 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); |
| 12225 | } |
| 12226 | else |
| 12227 | { |
| 12228 | bfd_signed_vma thumb_refs; |
| 12229 | /* Calculate the displacement between the PLT slot and the |
| 12230 | entry in the GOT. The eight-byte offset accounts for the |
| 12231 | value produced by adding to pc in the first instruction |
| 12232 | of the PLT stub. */ |
| 12233 | got_displacement = got_address - (plt_address + 8); |
| 12234 | |
| 12235 | BFD_ASSERT ((got_displacement & 0xf0000000) == 0); |
| 12236 | |
| 12237 | thumb_refs = eh->plt_thumb_refcount; |
| 12238 | if (!htab->use_blx) |
| 12239 | thumb_refs += eh->plt_maybe_thumb_refcount; |
| 12240 | |
| 12241 | if (thumb_refs > 0) |
| 12242 | { |
| 12243 | put_thumb_insn (htab, output_bfd, |
| 12244 | elf32_arm_plt_thumb_stub[0], ptr - 4); |
| 12245 | put_thumb_insn (htab, output_bfd, |
| 12246 | elf32_arm_plt_thumb_stub[1], ptr - 2); |
| 12247 | } |
| 12248 | |
| 12249 | put_arm_insn (htab, output_bfd, |
| 12250 | elf32_arm_plt_entry[0] |
| 12251 | | ((got_displacement & 0x0ff00000) >> 20), |
| 12252 | ptr + 0); |
| 12253 | put_arm_insn (htab, output_bfd, |
| 12254 | elf32_arm_plt_entry[1] |
| 12255 | | ((got_displacement & 0x000ff000) >> 12), |
| 12256 | ptr+ 4); |
| 12257 | put_arm_insn (htab, output_bfd, |
| 12258 | elf32_arm_plt_entry[2] |
| 12259 | | (got_displacement & 0x00000fff), |
| 12260 | ptr + 8); |
| 12261 | #ifdef FOUR_WORD_PLT |
| 12262 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], ptr + 12); |
| 12263 | #endif |
| 12264 | } |
| 12265 | |
| 12266 | /* Fill in the entry in the global offset table. */ |
| 12267 | bfd_put_32 (output_bfd, |
| 12268 | (splt->output_section->vma |
| 12269 | + splt->output_offset), |
| 12270 | sgot->contents + got_offset); |
| 12271 | |
| 12272 | /* Fill in the entry in the .rel(a).plt section. */ |
| 12273 | rel.r_addend = 0; |
| 12274 | rel.r_offset = got_address; |
| 12275 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); |
| 12276 | } |
| 12277 | |
| 12278 | loc = srel->contents + plt_index * RELOC_SIZE (htab); |
| 12279 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); |
| 12280 | |
| 12281 | if (!h->def_regular) |
| 12282 | { |
| 12283 | /* Mark the symbol as undefined, rather than as defined in |
| 12284 | the .plt section. Leave the value alone. */ |
| 12285 | sym->st_shndx = SHN_UNDEF; |
| 12286 | /* If the symbol is weak, we do need to clear the value. |
| 12287 | Otherwise, the PLT entry would provide a definition for |
| 12288 | the symbol even if the symbol wasn't defined anywhere, |
| 12289 | and so the symbol would never be NULL. */ |
| 12290 | if (!h->ref_regular_nonweak) |
| 12291 | sym->st_value = 0; |
| 12292 | } |
| 12293 | } |
| 12294 | |
| 12295 | if (h->got.offset != (bfd_vma) -1 |
| 12296 | && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_GD) == 0 |
| 12297 | && (elf32_arm_hash_entry (h)->tls_type & GOT_TLS_IE) == 0) |
| 12298 | { |
| 12299 | asection * sgot; |
| 12300 | asection * srel; |
| 12301 | Elf_Internal_Rela rel; |
| 12302 | bfd_byte *loc; |
| 12303 | bfd_vma offset; |
| 12304 | |
| 12305 | /* This symbol has an entry in the global offset table. Set it |
| 12306 | up. */ |
| 12307 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 12308 | srel = bfd_get_section_by_name (dynobj, RELOC_SECTION (htab, ".got")); |
| 12309 | BFD_ASSERT (sgot != NULL && srel != NULL); |
| 12310 | |
| 12311 | offset = (h->got.offset & ~(bfd_vma) 1); |
| 12312 | rel.r_addend = 0; |
| 12313 | rel.r_offset = (sgot->output_section->vma |
| 12314 | + sgot->output_offset |
| 12315 | + offset); |
| 12316 | |
| 12317 | /* If this is a static link, or it is a -Bsymbolic link and the |
| 12318 | symbol is defined locally or was forced to be local because |
| 12319 | of a version file, we just want to emit a RELATIVE reloc. |
| 12320 | The entry in the global offset table will already have been |
| 12321 | initialized in the relocate_section function. */ |
| 12322 | if (info->shared |
| 12323 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 12324 | { |
| 12325 | BFD_ASSERT ((h->got.offset & 1) != 0); |
| 12326 | rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); |
| 12327 | if (!htab->use_rel) |
| 12328 | { |
| 12329 | rel.r_addend = bfd_get_32 (output_bfd, sgot->contents + offset); |
| 12330 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); |
| 12331 | } |
| 12332 | } |
| 12333 | else |
| 12334 | { |
| 12335 | BFD_ASSERT ((h->got.offset & 1) == 0); |
| 12336 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + offset); |
| 12337 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); |
| 12338 | } |
| 12339 | |
| 12340 | loc = srel->contents + srel->reloc_count++ * RELOC_SIZE (htab); |
| 12341 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); |
| 12342 | } |
| 12343 | |
| 12344 | if (h->needs_copy) |
| 12345 | { |
| 12346 | asection * s; |
| 12347 | Elf_Internal_Rela rel; |
| 12348 | bfd_byte *loc; |
| 12349 | |
| 12350 | /* This symbol needs a copy reloc. Set it up. */ |
| 12351 | BFD_ASSERT (h->dynindx != -1 |
| 12352 | && (h->root.type == bfd_link_hash_defined |
| 12353 | || h->root.type == bfd_link_hash_defweak)); |
| 12354 | |
| 12355 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 12356 | RELOC_SECTION (htab, ".bss")); |
| 12357 | BFD_ASSERT (s != NULL); |
| 12358 | |
| 12359 | rel.r_addend = 0; |
| 12360 | rel.r_offset = (h->root.u.def.value |
| 12361 | + h->root.u.def.section->output_section->vma |
| 12362 | + h->root.u.def.section->output_offset); |
| 12363 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY); |
| 12364 | loc = s->contents + s->reloc_count++ * RELOC_SIZE (htab); |
| 12365 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, loc); |
| 12366 | } |
| 12367 | |
| 12368 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. On VxWorks, |
| 12369 | the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it is relative |
| 12370 | to the ".got" section. */ |
| 12371 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 12372 | || (!htab->vxworks_p && h == htab->root.hgot)) |
| 12373 | sym->st_shndx = SHN_ABS; |
| 12374 | |
| 12375 | return TRUE; |
| 12376 | } |
| 12377 | |
| 12378 | /* Finish up the dynamic sections. */ |
| 12379 | |
| 12380 | static bfd_boolean |
| 12381 | elf32_arm_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info * info) |
| 12382 | { |
| 12383 | bfd * dynobj; |
| 12384 | asection * sgot; |
| 12385 | asection * sdyn; |
| 12386 | struct elf32_arm_link_hash_table *htab; |
| 12387 | |
| 12388 | htab = elf32_arm_hash_table (info); |
| 12389 | if (htab == NULL) |
| 12390 | return FALSE; |
| 12391 | |
| 12392 | dynobj = elf_hash_table (info)->dynobj; |
| 12393 | |
| 12394 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
| 12395 | BFD_ASSERT (htab->symbian_p || sgot != NULL); |
| 12396 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 12397 | |
| 12398 | if (elf_hash_table (info)->dynamic_sections_created) |
| 12399 | { |
| 12400 | asection *splt; |
| 12401 | Elf32_External_Dyn *dyncon, *dynconend; |
| 12402 | |
| 12403 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 12404 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 12405 | |
| 12406 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 12407 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 12408 | |
| 12409 | for (; dyncon < dynconend; dyncon++) |
| 12410 | { |
| 12411 | Elf_Internal_Dyn dyn; |
| 12412 | const char * name; |
| 12413 | asection * s; |
| 12414 | |
| 12415 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 12416 | |
| 12417 | switch (dyn.d_tag) |
| 12418 | { |
| 12419 | unsigned int type; |
| 12420 | |
| 12421 | default: |
| 12422 | if (htab->vxworks_p |
| 12423 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
| 12424 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 12425 | break; |
| 12426 | |
| 12427 | case DT_HASH: |
| 12428 | name = ".hash"; |
| 12429 | goto get_vma_if_bpabi; |
| 12430 | case DT_STRTAB: |
| 12431 | name = ".dynstr"; |
| 12432 | goto get_vma_if_bpabi; |
| 12433 | case DT_SYMTAB: |
| 12434 | name = ".dynsym"; |
| 12435 | goto get_vma_if_bpabi; |
| 12436 | case DT_VERSYM: |
| 12437 | name = ".gnu.version"; |
| 12438 | goto get_vma_if_bpabi; |
| 12439 | case DT_VERDEF: |
| 12440 | name = ".gnu.version_d"; |
| 12441 | goto get_vma_if_bpabi; |
| 12442 | case DT_VERNEED: |
| 12443 | name = ".gnu.version_r"; |
| 12444 | goto get_vma_if_bpabi; |
| 12445 | |
| 12446 | case DT_PLTGOT: |
| 12447 | name = ".got"; |
| 12448 | goto get_vma; |
| 12449 | case DT_JMPREL: |
| 12450 | name = RELOC_SECTION (htab, ".plt"); |
| 12451 | get_vma: |
| 12452 | s = bfd_get_section_by_name (output_bfd, name); |
| 12453 | BFD_ASSERT (s != NULL); |
| 12454 | if (!htab->symbian_p) |
| 12455 | dyn.d_un.d_ptr = s->vma; |
| 12456 | else |
| 12457 | /* In the BPABI, tags in the PT_DYNAMIC section point |
| 12458 | at the file offset, not the memory address, for the |
| 12459 | convenience of the post linker. */ |
| 12460 | dyn.d_un.d_ptr = s->filepos; |
| 12461 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 12462 | break; |
| 12463 | |
| 12464 | get_vma_if_bpabi: |
| 12465 | if (htab->symbian_p) |
| 12466 | goto get_vma; |
| 12467 | break; |
| 12468 | |
| 12469 | case DT_PLTRELSZ: |
| 12470 | s = bfd_get_section_by_name (output_bfd, |
| 12471 | RELOC_SECTION (htab, ".plt")); |
| 12472 | BFD_ASSERT (s != NULL); |
| 12473 | dyn.d_un.d_val = s->size; |
| 12474 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 12475 | break; |
| 12476 | |
| 12477 | case DT_RELSZ: |
| 12478 | case DT_RELASZ: |
| 12479 | if (!htab->symbian_p) |
| 12480 | { |
| 12481 | /* My reading of the SVR4 ABI indicates that the |
| 12482 | procedure linkage table relocs (DT_JMPREL) should be |
| 12483 | included in the overall relocs (DT_REL). This is |
| 12484 | what Solaris does. However, UnixWare can not handle |
| 12485 | that case. Therefore, we override the DT_RELSZ entry |
| 12486 | here to make it not include the JMPREL relocs. Since |
| 12487 | the linker script arranges for .rel(a).plt to follow all |
| 12488 | other relocation sections, we don't have to worry |
| 12489 | about changing the DT_REL entry. */ |
| 12490 | s = bfd_get_section_by_name (output_bfd, |
| 12491 | RELOC_SECTION (htab, ".plt")); |
| 12492 | if (s != NULL) |
| 12493 | dyn.d_un.d_val -= s->size; |
| 12494 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 12495 | break; |
| 12496 | } |
| 12497 | /* Fall through. */ |
| 12498 | |
| 12499 | case DT_REL: |
| 12500 | case DT_RELA: |
| 12501 | /* In the BPABI, the DT_REL tag must point at the file |
| 12502 | offset, not the VMA, of the first relocation |
| 12503 | section. So, we use code similar to that in |
| 12504 | elflink.c, but do not check for SHF_ALLOC on the |
| 12505 | relcoation section, since relocations sections are |
| 12506 | never allocated under the BPABI. The comments above |
| 12507 | about Unixware notwithstanding, we include all of the |
| 12508 | relocations here. */ |
| 12509 | if (htab->symbian_p) |
| 12510 | { |
| 12511 | unsigned int i; |
| 12512 | type = ((dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) |
| 12513 | ? SHT_REL : SHT_RELA); |
| 12514 | dyn.d_un.d_val = 0; |
| 12515 | for (i = 1; i < elf_numsections (output_bfd); i++) |
| 12516 | { |
| 12517 | Elf_Internal_Shdr *hdr |
| 12518 | = elf_elfsections (output_bfd)[i]; |
| 12519 | if (hdr->sh_type == type) |
| 12520 | { |
| 12521 | if (dyn.d_tag == DT_RELSZ |
| 12522 | || dyn.d_tag == DT_RELASZ) |
| 12523 | dyn.d_un.d_val += hdr->sh_size; |
| 12524 | else if ((ufile_ptr) hdr->sh_offset |
| 12525 | <= dyn.d_un.d_val - 1) |
| 12526 | dyn.d_un.d_val = hdr->sh_offset; |
| 12527 | } |
| 12528 | } |
| 12529 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 12530 | } |
| 12531 | break; |
| 12532 | |
| 12533 | /* Set the bottom bit of DT_INIT/FINI if the |
| 12534 | corresponding function is Thumb. */ |
| 12535 | case DT_INIT: |
| 12536 | name = info->init_function; |
| 12537 | goto get_sym; |
| 12538 | case DT_FINI: |
| 12539 | name = info->fini_function; |
| 12540 | get_sym: |
| 12541 | /* If it wasn't set by elf_bfd_final_link |
| 12542 | then there is nothing to adjust. */ |
| 12543 | if (dyn.d_un.d_val != 0) |
| 12544 | { |
| 12545 | struct elf_link_hash_entry * eh; |
| 12546 | |
| 12547 | eh = elf_link_hash_lookup (elf_hash_table (info), name, |
| 12548 | FALSE, FALSE, TRUE); |
| 12549 | if (eh != NULL |
| 12550 | && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC) |
| 12551 | { |
| 12552 | dyn.d_un.d_val |= 1; |
| 12553 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 12554 | } |
| 12555 | } |
| 12556 | break; |
| 12557 | } |
| 12558 | } |
| 12559 | |
| 12560 | /* Fill in the first entry in the procedure linkage table. */ |
| 12561 | if (splt->size > 0 && htab->plt_header_size) |
| 12562 | { |
| 12563 | const bfd_vma *plt0_entry; |
| 12564 | bfd_vma got_address, plt_address, got_displacement; |
| 12565 | |
| 12566 | /* Calculate the addresses of the GOT and PLT. */ |
| 12567 | got_address = sgot->output_section->vma + sgot->output_offset; |
| 12568 | plt_address = splt->output_section->vma + splt->output_offset; |
| 12569 | |
| 12570 | if (htab->vxworks_p) |
| 12571 | { |
| 12572 | /* The VxWorks GOT is relocated by the dynamic linker. |
| 12573 | Therefore, we must emit relocations rather than simply |
| 12574 | computing the values now. */ |
| 12575 | Elf_Internal_Rela rel; |
| 12576 | |
| 12577 | plt0_entry = elf32_arm_vxworks_exec_plt0_entry; |
| 12578 | put_arm_insn (htab, output_bfd, plt0_entry[0], |
| 12579 | splt->contents + 0); |
| 12580 | put_arm_insn (htab, output_bfd, plt0_entry[1], |
| 12581 | splt->contents + 4); |
| 12582 | put_arm_insn (htab, output_bfd, plt0_entry[2], |
| 12583 | splt->contents + 8); |
| 12584 | bfd_put_32 (output_bfd, got_address, splt->contents + 12); |
| 12585 | |
| 12586 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_. */ |
| 12587 | rel.r_offset = plt_address + 12; |
| 12588 | rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); |
| 12589 | rel.r_addend = 0; |
| 12590 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, |
| 12591 | htab->srelplt2->contents); |
| 12592 | } |
| 12593 | else |
| 12594 | { |
| 12595 | got_displacement = got_address - (plt_address + 16); |
| 12596 | |
| 12597 | plt0_entry = elf32_arm_plt0_entry; |
| 12598 | put_arm_insn (htab, output_bfd, plt0_entry[0], |
| 12599 | splt->contents + 0); |
| 12600 | put_arm_insn (htab, output_bfd, plt0_entry[1], |
| 12601 | splt->contents + 4); |
| 12602 | put_arm_insn (htab, output_bfd, plt0_entry[2], |
| 12603 | splt->contents + 8); |
| 12604 | put_arm_insn (htab, output_bfd, plt0_entry[3], |
| 12605 | splt->contents + 12); |
| 12606 | |
| 12607 | #ifdef FOUR_WORD_PLT |
| 12608 | /* The displacement value goes in the otherwise-unused |
| 12609 | last word of the second entry. */ |
| 12610 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 28); |
| 12611 | #else |
| 12612 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 16); |
| 12613 | #endif |
| 12614 | } |
| 12615 | } |
| 12616 | |
| 12617 | /* UnixWare sets the entsize of .plt to 4, although that doesn't |
| 12618 | really seem like the right value. */ |
| 12619 | if (splt->output_section->owner == output_bfd) |
| 12620 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; |
| 12621 | |
| 12622 | if (htab->vxworks_p && !info->shared && htab->splt->size > 0) |
| 12623 | { |
| 12624 | /* Correct the .rel(a).plt.unloaded relocations. They will have |
| 12625 | incorrect symbol indexes. */ |
| 12626 | int num_plts; |
| 12627 | unsigned char *p; |
| 12628 | |
| 12629 | num_plts = ((htab->splt->size - htab->plt_header_size) |
| 12630 | / htab->plt_entry_size); |
| 12631 | p = htab->srelplt2->contents + RELOC_SIZE (htab); |
| 12632 | |
| 12633 | for (; num_plts; num_plts--) |
| 12634 | { |
| 12635 | Elf_Internal_Rela rel; |
| 12636 | |
| 12637 | SWAP_RELOC_IN (htab) (output_bfd, p, &rel); |
| 12638 | rel.r_info = ELF32_R_INFO (htab->root.hgot->indx, R_ARM_ABS32); |
| 12639 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, p); |
| 12640 | p += RELOC_SIZE (htab); |
| 12641 | |
| 12642 | SWAP_RELOC_IN (htab) (output_bfd, p, &rel); |
| 12643 | rel.r_info = ELF32_R_INFO (htab->root.hplt->indx, R_ARM_ABS32); |
| 12644 | SWAP_RELOC_OUT (htab) (output_bfd, &rel, p); |
| 12645 | p += RELOC_SIZE (htab); |
| 12646 | } |
| 12647 | } |
| 12648 | } |
| 12649 | |
| 12650 | /* Fill in the first three entries in the global offset table. */ |
| 12651 | if (sgot) |
| 12652 | { |
| 12653 | if (sgot->size > 0) |
| 12654 | { |
| 12655 | if (sdyn == NULL) |
| 12656 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 12657 | else |
| 12658 | bfd_put_32 (output_bfd, |
| 12659 | sdyn->output_section->vma + sdyn->output_offset, |
| 12660 | sgot->contents); |
| 12661 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
| 12662 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
| 12663 | } |
| 12664 | |
| 12665 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 12666 | } |
| 12667 | |
| 12668 | return TRUE; |
| 12669 | } |
| 12670 | |
| 12671 | static void |
| 12672 | elf32_arm_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED) |
| 12673 | { |
| 12674 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
| 12675 | struct elf32_arm_link_hash_table *globals; |
| 12676 | |
| 12677 | i_ehdrp = elf_elfheader (abfd); |
| 12678 | |
| 12679 | if (EF_ARM_EABI_VERSION (i_ehdrp->e_flags) == EF_ARM_EABI_UNKNOWN) |
| 12680 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_ARM; |
| 12681 | else |
| 12682 | i_ehdrp->e_ident[EI_OSABI] = 0; |
| 12683 | i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION; |
| 12684 | |
| 12685 | if (link_info) |
| 12686 | { |
| 12687 | globals = elf32_arm_hash_table (link_info); |
| 12688 | if (globals != NULL && globals->byteswap_code) |
| 12689 | i_ehdrp->e_flags |= EF_ARM_BE8; |
| 12690 | } |
| 12691 | } |
| 12692 | |
| 12693 | static enum elf_reloc_type_class |
| 12694 | elf32_arm_reloc_type_class (const Elf_Internal_Rela *rela) |
| 12695 | { |
| 12696 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 12697 | { |
| 12698 | case R_ARM_RELATIVE: |
| 12699 | return reloc_class_relative; |
| 12700 | case R_ARM_JUMP_SLOT: |
| 12701 | return reloc_class_plt; |
| 12702 | case R_ARM_COPY: |
| 12703 | return reloc_class_copy; |
| 12704 | default: |
| 12705 | return reloc_class_normal; |
| 12706 | } |
| 12707 | } |
| 12708 | |
| 12709 | /* Set the right machine number for an Arm ELF file. */ |
| 12710 | |
| 12711 | static bfd_boolean |
| 12712 | elf32_arm_section_flags (flagword *flags, const Elf_Internal_Shdr *hdr) |
| 12713 | { |
| 12714 | if (hdr->sh_type == SHT_NOTE) |
| 12715 | *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; |
| 12716 | |
| 12717 | return TRUE; |
| 12718 | } |
| 12719 | |
| 12720 | static void |
| 12721 | elf32_arm_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED) |
| 12722 | { |
| 12723 | bfd_arm_update_notes (abfd, ARM_NOTE_SECTION); |
| 12724 | } |
| 12725 | |
| 12726 | /* Return TRUE if this is an unwinding table entry. */ |
| 12727 | |
| 12728 | static bfd_boolean |
| 12729 | is_arm_elf_unwind_section_name (bfd * abfd ATTRIBUTE_UNUSED, const char * name) |
| 12730 | { |
| 12731 | return (CONST_STRNEQ (name, ELF_STRING_ARM_unwind) |
| 12732 | || CONST_STRNEQ (name, ELF_STRING_ARM_unwind_once)); |
| 12733 | } |
| 12734 | |
| 12735 | |
| 12736 | /* Set the type and flags for an ARM section. We do this by |
| 12737 | the section name, which is a hack, but ought to work. */ |
| 12738 | |
| 12739 | static bfd_boolean |
| 12740 | elf32_arm_fake_sections (bfd * abfd, Elf_Internal_Shdr * hdr, asection * sec) |
| 12741 | { |
| 12742 | const char * name; |
| 12743 | |
| 12744 | name = bfd_get_section_name (abfd, sec); |
| 12745 | |
| 12746 | if (is_arm_elf_unwind_section_name (abfd, name)) |
| 12747 | { |
| 12748 | hdr->sh_type = SHT_ARM_EXIDX; |
| 12749 | hdr->sh_flags |= SHF_LINK_ORDER; |
| 12750 | } |
| 12751 | return TRUE; |
| 12752 | } |
| 12753 | |
| 12754 | /* Handle an ARM specific section when reading an object file. This is |
| 12755 | called when bfd_section_from_shdr finds a section with an unknown |
| 12756 | type. */ |
| 12757 | |
| 12758 | static bfd_boolean |
| 12759 | elf32_arm_section_from_shdr (bfd *abfd, |
| 12760 | Elf_Internal_Shdr * hdr, |
| 12761 | const char *name, |
| 12762 | int shindex) |
| 12763 | { |
| 12764 | /* There ought to be a place to keep ELF backend specific flags, but |
| 12765 | at the moment there isn't one. We just keep track of the |
| 12766 | sections by their name, instead. Fortunately, the ABI gives |
| 12767 | names for all the ARM specific sections, so we will probably get |
| 12768 | away with this. */ |
| 12769 | switch (hdr->sh_type) |
| 12770 | { |
| 12771 | case SHT_ARM_EXIDX: |
| 12772 | case SHT_ARM_PREEMPTMAP: |
| 12773 | case SHT_ARM_ATTRIBUTES: |
| 12774 | break; |
| 12775 | |
| 12776 | default: |
| 12777 | return FALSE; |
| 12778 | } |
| 12779 | |
| 12780 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
| 12781 | return FALSE; |
| 12782 | |
| 12783 | return TRUE; |
| 12784 | } |
| 12785 | |
| 12786 | static _arm_elf_section_data * |
| 12787 | get_arm_elf_section_data (asection * sec) |
| 12788 | { |
| 12789 | if (sec && sec->owner && is_arm_elf (sec->owner)) |
| 12790 | return elf32_arm_section_data (sec); |
| 12791 | else |
| 12792 | return NULL; |
| 12793 | } |
| 12794 | |
| 12795 | typedef struct |
| 12796 | { |
| 12797 | void *finfo; |
| 12798 | struct bfd_link_info *info; |
| 12799 | asection *sec; |
| 12800 | int sec_shndx; |
| 12801 | int (*func) (void *, const char *, Elf_Internal_Sym *, |
| 12802 | asection *, struct elf_link_hash_entry *); |
| 12803 | } output_arch_syminfo; |
| 12804 | |
| 12805 | enum map_symbol_type |
| 12806 | { |
| 12807 | ARM_MAP_ARM, |
| 12808 | ARM_MAP_THUMB, |
| 12809 | ARM_MAP_DATA |
| 12810 | }; |
| 12811 | |
| 12812 | |
| 12813 | /* Output a single mapping symbol. */ |
| 12814 | |
| 12815 | static bfd_boolean |
| 12816 | elf32_arm_output_map_sym (output_arch_syminfo *osi, |
| 12817 | enum map_symbol_type type, |
| 12818 | bfd_vma offset) |
| 12819 | { |
| 12820 | static const char *names[3] = {"$a", "$t", "$d"}; |
| 12821 | Elf_Internal_Sym sym; |
| 12822 | |
| 12823 | sym.st_value = osi->sec->output_section->vma |
| 12824 | + osi->sec->output_offset |
| 12825 | + offset; |
| 12826 | sym.st_size = 0; |
| 12827 | sym.st_other = 0; |
| 12828 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE); |
| 12829 | sym.st_shndx = osi->sec_shndx; |
| 12830 | elf32_arm_section_map_add (osi->sec, names[type][1], offset); |
| 12831 | return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1; |
| 12832 | } |
| 12833 | |
| 12834 | |
| 12835 | /* Output mapping symbols for PLT entries associated with H. */ |
| 12836 | |
| 12837 | static bfd_boolean |
| 12838 | elf32_arm_output_plt_map (struct elf_link_hash_entry *h, void *inf) |
| 12839 | { |
| 12840 | output_arch_syminfo *osi = (output_arch_syminfo *) inf; |
| 12841 | struct elf32_arm_link_hash_table *htab; |
| 12842 | struct elf32_arm_link_hash_entry *eh; |
| 12843 | bfd_vma addr; |
| 12844 | |
| 12845 | if (h->root.type == bfd_link_hash_indirect) |
| 12846 | return TRUE; |
| 12847 | |
| 12848 | if (h->root.type == bfd_link_hash_warning) |
| 12849 | /* When warning symbols are created, they **replace** the "real" |
| 12850 | entry in the hash table, thus we never get to see the real |
| 12851 | symbol in a hash traversal. So look at it now. */ |
| 12852 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 12853 | |
| 12854 | if (h->plt.offset == (bfd_vma) -1) |
| 12855 | return TRUE; |
| 12856 | |
| 12857 | htab = elf32_arm_hash_table (osi->info); |
| 12858 | if (htab == NULL) |
| 12859 | return FALSE; |
| 12860 | |
| 12861 | eh = (struct elf32_arm_link_hash_entry *) h; |
| 12862 | addr = h->plt.offset; |
| 12863 | if (htab->symbian_p) |
| 12864 | { |
| 12865 | if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr)) |
| 12866 | return FALSE; |
| 12867 | if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 4)) |
| 12868 | return FALSE; |
| 12869 | } |
| 12870 | else if (htab->vxworks_p) |
| 12871 | { |
| 12872 | if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr)) |
| 12873 | return FALSE; |
| 12874 | if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 8)) |
| 12875 | return FALSE; |
| 12876 | if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr + 12)) |
| 12877 | return FALSE; |
| 12878 | if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 20)) |
| 12879 | return FALSE; |
| 12880 | } |
| 12881 | else |
| 12882 | { |
| 12883 | bfd_signed_vma thumb_refs; |
| 12884 | |
| 12885 | thumb_refs = eh->plt_thumb_refcount; |
| 12886 | if (!htab->use_blx) |
| 12887 | thumb_refs += eh->plt_maybe_thumb_refcount; |
| 12888 | |
| 12889 | if (thumb_refs > 0) |
| 12890 | { |
| 12891 | if (!elf32_arm_output_map_sym (osi, ARM_MAP_THUMB, addr - 4)) |
| 12892 | return FALSE; |
| 12893 | } |
| 12894 | #ifdef FOUR_WORD_PLT |
| 12895 | if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr)) |
| 12896 | return FALSE; |
| 12897 | if (!elf32_arm_output_map_sym (osi, ARM_MAP_DATA, addr + 12)) |
| 12898 | return FALSE; |
| 12899 | #else |
| 12900 | /* A three-word PLT with no Thumb thunk contains only Arm code, |
| 12901 | so only need to output a mapping symbol for the first PLT entry and |
| 12902 | entries with thumb thunks. */ |
| 12903 | if (thumb_refs > 0 || addr == 20) |
| 12904 | { |
| 12905 | if (!elf32_arm_output_map_sym (osi, ARM_MAP_ARM, addr)) |
| 12906 | return FALSE; |
| 12907 | } |
| 12908 | #endif |
| 12909 | } |
| 12910 | |
| 12911 | return TRUE; |
| 12912 | } |
| 12913 | |
| 12914 | /* Output a single local symbol for a generated stub. */ |
| 12915 | |
| 12916 | static bfd_boolean |
| 12917 | elf32_arm_output_stub_sym (output_arch_syminfo *osi, const char *name, |
| 12918 | bfd_vma offset, bfd_vma size) |
| 12919 | { |
| 12920 | Elf_Internal_Sym sym; |
| 12921 | |
| 12922 | sym.st_value = osi->sec->output_section->vma |
| 12923 | + osi->sec->output_offset |
| 12924 | + offset; |
| 12925 | sym.st_size = size; |
| 12926 | sym.st_other = 0; |
| 12927 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC); |
| 12928 | sym.st_shndx = osi->sec_shndx; |
| 12929 | return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1; |
| 12930 | } |
| 12931 | |
| 12932 | static bfd_boolean |
| 12933 | arm_map_one_stub (struct bfd_hash_entry * gen_entry, |
| 12934 | void * in_arg) |
| 12935 | { |
| 12936 | struct elf32_arm_stub_hash_entry *stub_entry; |
| 12937 | asection *stub_sec; |
| 12938 | bfd_vma addr; |
| 12939 | char *stub_name; |
| 12940 | output_arch_syminfo *osi; |
| 12941 | const insn_sequence *template_sequence; |
| 12942 | enum stub_insn_type prev_type; |
| 12943 | int size; |
| 12944 | int i; |
| 12945 | enum map_symbol_type sym_type; |
| 12946 | |
| 12947 | /* Massage our args to the form they really have. */ |
| 12948 | stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry; |
| 12949 | osi = (output_arch_syminfo *) in_arg; |
| 12950 | |
| 12951 | stub_sec = stub_entry->stub_sec; |
| 12952 | |
| 12953 | /* Ensure this stub is attached to the current section being |
| 12954 | processed. */ |
| 12955 | if (stub_sec != osi->sec) |
| 12956 | return TRUE; |
| 12957 | |
| 12958 | addr = (bfd_vma) stub_entry->stub_offset; |
| 12959 | stub_name = stub_entry->output_name; |
| 12960 | |
| 12961 | template_sequence = stub_entry->stub_template; |
| 12962 | switch (template_sequence[0].type) |
| 12963 | { |
| 12964 | case ARM_TYPE: |
| 12965 | if (!elf32_arm_output_stub_sym (osi, stub_name, addr, stub_entry->stub_size)) |
| 12966 | return FALSE; |
| 12967 | break; |
| 12968 | case THUMB16_TYPE: |
| 12969 | case THUMB32_TYPE: |
| 12970 | if (!elf32_arm_output_stub_sym (osi, stub_name, addr | 1, |
| 12971 | stub_entry->stub_size)) |
| 12972 | return FALSE; |
| 12973 | break; |
| 12974 | default: |
| 12975 | BFD_FAIL (); |
| 12976 | return 0; |
| 12977 | } |
| 12978 | |
| 12979 | prev_type = DATA_TYPE; |
| 12980 | size = 0; |
| 12981 | for (i = 0; i < stub_entry->stub_template_size; i++) |
| 12982 | { |
| 12983 | switch (template_sequence[i].type) |
| 12984 | { |
| 12985 | case ARM_TYPE: |
| 12986 | sym_type = ARM_MAP_ARM; |
| 12987 | break; |
| 12988 | |
| 12989 | case THUMB16_TYPE: |
| 12990 | case THUMB32_TYPE: |
| 12991 | sym_type = ARM_MAP_THUMB; |
| 12992 | break; |
| 12993 | |
| 12994 | case DATA_TYPE: |
| 12995 | sym_type = ARM_MAP_DATA; |
| 12996 | break; |
| 12997 | |
| 12998 | default: |
| 12999 | BFD_FAIL (); |
| 13000 | return FALSE; |
| 13001 | } |
| 13002 | |
| 13003 | if (template_sequence[i].type != prev_type) |
| 13004 | { |
| 13005 | prev_type = template_sequence[i].type; |
| 13006 | if (!elf32_arm_output_map_sym (osi, sym_type, addr + size)) |
| 13007 | return FALSE; |
| 13008 | } |
| 13009 | |
| 13010 | switch (template_sequence[i].type) |
| 13011 | { |
| 13012 | case ARM_TYPE: |
| 13013 | case THUMB32_TYPE: |
| 13014 | size += 4; |
| 13015 | break; |
| 13016 | |
| 13017 | case THUMB16_TYPE: |
| 13018 | size += 2; |
| 13019 | break; |
| 13020 | |
| 13021 | case DATA_TYPE: |
| 13022 | size += 4; |
| 13023 | break; |
| 13024 | |
| 13025 | default: |
| 13026 | BFD_FAIL (); |
| 13027 | return FALSE; |
| 13028 | } |
| 13029 | } |
| 13030 | |
| 13031 | return TRUE; |
| 13032 | } |
| 13033 | |
| 13034 | /* Output mapping symbols for linker generated sections, |
| 13035 | and for those data-only sections that do not have a |
| 13036 | $d. */ |
| 13037 | |
| 13038 | static bfd_boolean |
| 13039 | elf32_arm_output_arch_local_syms (bfd *output_bfd, |
| 13040 | struct bfd_link_info *info, |
| 13041 | void *finfo, |
| 13042 | int (*func) (void *, const char *, |
| 13043 | Elf_Internal_Sym *, |
| 13044 | asection *, |
| 13045 | struct elf_link_hash_entry *)) |
| 13046 | { |
| 13047 | output_arch_syminfo osi; |
| 13048 | struct elf32_arm_link_hash_table *htab; |
| 13049 | bfd_vma offset; |
| 13050 | bfd_size_type size; |
| 13051 | bfd *input_bfd; |
| 13052 | |
| 13053 | htab = elf32_arm_hash_table (info); |
| 13054 | if (htab == NULL) |
| 13055 | return FALSE; |
| 13056 | |
| 13057 | check_use_blx (htab); |
| 13058 | |
| 13059 | osi.finfo = finfo; |
| 13060 | osi.info = info; |
| 13061 | osi.func = func; |
| 13062 | |
| 13063 | /* Add a $d mapping symbol to data-only sections that |
| 13064 | don't have any mapping symbol. This may result in (harmless) redundant |
| 13065 | mapping symbols. */ |
| 13066 | for (input_bfd = info->input_bfds; |
| 13067 | input_bfd != NULL; |
| 13068 | input_bfd = input_bfd->link_next) |
| 13069 | { |
| 13070 | if ((input_bfd->flags & (BFD_LINKER_CREATED | HAS_SYMS)) == HAS_SYMS) |
| 13071 | for (osi.sec = input_bfd->sections; |
| 13072 | osi.sec != NULL; |
| 13073 | osi.sec = osi.sec->next) |
| 13074 | { |
| 13075 | if (osi.sec->output_section != NULL |
| 13076 | && ((osi.sec->output_section->flags & (SEC_ALLOC | SEC_CODE)) |
| 13077 | != 0) |
| 13078 | && (osi.sec->flags & (SEC_HAS_CONTENTS | SEC_LINKER_CREATED)) |
| 13079 | == SEC_HAS_CONTENTS |
| 13080 | && get_arm_elf_section_data (osi.sec) != NULL |
| 13081 | && get_arm_elf_section_data (osi.sec)->mapcount == 0 |
| 13082 | && osi.sec->size > 0) |
| 13083 | { |
| 13084 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 13085 | (output_bfd, osi.sec->output_section); |
| 13086 | if (osi.sec_shndx != (int)SHN_BAD) |
| 13087 | elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 0); |
| 13088 | } |
| 13089 | } |
| 13090 | } |
| 13091 | |
| 13092 | /* ARM->Thumb glue. */ |
| 13093 | if (htab->arm_glue_size > 0) |
| 13094 | { |
| 13095 | osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner, |
| 13096 | ARM2THUMB_GLUE_SECTION_NAME); |
| 13097 | |
| 13098 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 13099 | (output_bfd, osi.sec->output_section); |
| 13100 | if (info->shared || htab->root.is_relocatable_executable |
| 13101 | || htab->pic_veneer) |
| 13102 | size = ARM2THUMB_PIC_GLUE_SIZE; |
| 13103 | else if (htab->use_blx) |
| 13104 | size = ARM2THUMB_V5_STATIC_GLUE_SIZE; |
| 13105 | else |
| 13106 | size = ARM2THUMB_STATIC_GLUE_SIZE; |
| 13107 | |
| 13108 | for (offset = 0; offset < htab->arm_glue_size; offset += size) |
| 13109 | { |
| 13110 | elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset); |
| 13111 | elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, offset + size - 4); |
| 13112 | } |
| 13113 | } |
| 13114 | |
| 13115 | /* Thumb->ARM glue. */ |
| 13116 | if (htab->thumb_glue_size > 0) |
| 13117 | { |
| 13118 | osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner, |
| 13119 | THUMB2ARM_GLUE_SECTION_NAME); |
| 13120 | |
| 13121 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 13122 | (output_bfd, osi.sec->output_section); |
| 13123 | size = THUMB2ARM_GLUE_SIZE; |
| 13124 | |
| 13125 | for (offset = 0; offset < htab->thumb_glue_size; offset += size) |
| 13126 | { |
| 13127 | elf32_arm_output_map_sym (&osi, ARM_MAP_THUMB, offset); |
| 13128 | elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, offset + 4); |
| 13129 | } |
| 13130 | } |
| 13131 | |
| 13132 | /* ARMv4 BX veneers. */ |
| 13133 | if (htab->bx_glue_size > 0) |
| 13134 | { |
| 13135 | osi.sec = bfd_get_section_by_name (htab->bfd_of_glue_owner, |
| 13136 | ARM_BX_GLUE_SECTION_NAME); |
| 13137 | |
| 13138 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 13139 | (output_bfd, osi.sec->output_section); |
| 13140 | |
| 13141 | elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0); |
| 13142 | } |
| 13143 | |
| 13144 | /* Long calls stubs. */ |
| 13145 | if (htab->stub_bfd && htab->stub_bfd->sections) |
| 13146 | { |
| 13147 | asection* stub_sec; |
| 13148 | |
| 13149 | for (stub_sec = htab->stub_bfd->sections; |
| 13150 | stub_sec != NULL; |
| 13151 | stub_sec = stub_sec->next) |
| 13152 | { |
| 13153 | /* Ignore non-stub sections. */ |
| 13154 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 13155 | continue; |
| 13156 | |
| 13157 | osi.sec = stub_sec; |
| 13158 | |
| 13159 | osi.sec_shndx = _bfd_elf_section_from_bfd_section |
| 13160 | (output_bfd, osi.sec->output_section); |
| 13161 | |
| 13162 | bfd_hash_traverse (&htab->stub_hash_table, arm_map_one_stub, &osi); |
| 13163 | } |
| 13164 | } |
| 13165 | |
| 13166 | /* Finally, output mapping symbols for the PLT. */ |
| 13167 | if (!htab->splt || htab->splt->size == 0) |
| 13168 | return TRUE; |
| 13169 | |
| 13170 | osi.sec_shndx = _bfd_elf_section_from_bfd_section (output_bfd, |
| 13171 | htab->splt->output_section); |
| 13172 | osi.sec = htab->splt; |
| 13173 | /* Output mapping symbols for the plt header. SymbianOS does not have a |
| 13174 | plt header. */ |
| 13175 | if (htab->vxworks_p) |
| 13176 | { |
| 13177 | /* VxWorks shared libraries have no PLT header. */ |
| 13178 | if (!info->shared) |
| 13179 | { |
| 13180 | if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0)) |
| 13181 | return FALSE; |
| 13182 | if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 12)) |
| 13183 | return FALSE; |
| 13184 | } |
| 13185 | } |
| 13186 | else if (!htab->symbian_p) |
| 13187 | { |
| 13188 | if (!elf32_arm_output_map_sym (&osi, ARM_MAP_ARM, 0)) |
| 13189 | return FALSE; |
| 13190 | #ifndef FOUR_WORD_PLT |
| 13191 | if (!elf32_arm_output_map_sym (&osi, ARM_MAP_DATA, 16)) |
| 13192 | return FALSE; |
| 13193 | #endif |
| 13194 | } |
| 13195 | |
| 13196 | elf_link_hash_traverse (&htab->root, elf32_arm_output_plt_map, (void *) &osi); |
| 13197 | return TRUE; |
| 13198 | } |
| 13199 | |
| 13200 | /* Allocate target specific section data. */ |
| 13201 | |
| 13202 | static bfd_boolean |
| 13203 | elf32_arm_new_section_hook (bfd *abfd, asection *sec) |
| 13204 | { |
| 13205 | if (!sec->used_by_bfd) |
| 13206 | { |
| 13207 | _arm_elf_section_data *sdata; |
| 13208 | bfd_size_type amt = sizeof (*sdata); |
| 13209 | |
| 13210 | sdata = (_arm_elf_section_data *) bfd_zalloc (abfd, amt); |
| 13211 | if (sdata == NULL) |
| 13212 | return FALSE; |
| 13213 | sec->used_by_bfd = sdata; |
| 13214 | } |
| 13215 | |
| 13216 | return _bfd_elf_new_section_hook (abfd, sec); |
| 13217 | } |
| 13218 | |
| 13219 | |
| 13220 | /* Used to order a list of mapping symbols by address. */ |
| 13221 | |
| 13222 | static int |
| 13223 | elf32_arm_compare_mapping (const void * a, const void * b) |
| 13224 | { |
| 13225 | const elf32_arm_section_map *amap = (const elf32_arm_section_map *) a; |
| 13226 | const elf32_arm_section_map *bmap = (const elf32_arm_section_map *) b; |
| 13227 | |
| 13228 | if (amap->vma > bmap->vma) |
| 13229 | return 1; |
| 13230 | else if (amap->vma < bmap->vma) |
| 13231 | return -1; |
| 13232 | else if (amap->type > bmap->type) |
| 13233 | /* Ensure results do not depend on the host qsort for objects with |
| 13234 | multiple mapping symbols at the same address by sorting on type |
| 13235 | after vma. */ |
| 13236 | return 1; |
| 13237 | else if (amap->type < bmap->type) |
| 13238 | return -1; |
| 13239 | else |
| 13240 | return 0; |
| 13241 | } |
| 13242 | |
| 13243 | /* Add OFFSET to lower 31 bits of ADDR, leaving other bits unmodified. */ |
| 13244 | |
| 13245 | static unsigned long |
| 13246 | offset_prel31 (unsigned long addr, bfd_vma offset) |
| 13247 | { |
| 13248 | return (addr & ~0x7ffffffful) | ((addr + offset) & 0x7ffffffful); |
| 13249 | } |
| 13250 | |
| 13251 | /* Copy an .ARM.exidx table entry, adding OFFSET to (applied) PREL31 |
| 13252 | relocations. */ |
| 13253 | |
| 13254 | static void |
| 13255 | copy_exidx_entry (bfd *output_bfd, bfd_byte *to, bfd_byte *from, bfd_vma offset) |
| 13256 | { |
| 13257 | unsigned long first_word = bfd_get_32 (output_bfd, from); |
| 13258 | unsigned long second_word = bfd_get_32 (output_bfd, from + 4); |
| 13259 | |
| 13260 | /* High bit of first word is supposed to be zero. */ |
| 13261 | if ((first_word & 0x80000000ul) == 0) |
| 13262 | first_word = offset_prel31 (first_word, offset); |
| 13263 | |
| 13264 | /* If the high bit of the first word is clear, and the bit pattern is not 0x1 |
| 13265 | (EXIDX_CANTUNWIND), this is an offset to an .ARM.extab entry. */ |
| 13266 | if ((second_word != 0x1) && ((second_word & 0x80000000ul) == 0)) |
| 13267 | second_word = offset_prel31 (second_word, offset); |
| 13268 | |
| 13269 | bfd_put_32 (output_bfd, first_word, to); |
| 13270 | bfd_put_32 (output_bfd, second_word, to + 4); |
| 13271 | } |
| 13272 | |
| 13273 | /* Data for make_branch_to_a8_stub(). */ |
| 13274 | |
| 13275 | struct a8_branch_to_stub_data { |
| 13276 | asection *writing_section; |
| 13277 | bfd_byte *contents; |
| 13278 | }; |
| 13279 | |
| 13280 | |
| 13281 | /* Helper to insert branches to Cortex-A8 erratum stubs in the right |
| 13282 | places for a particular section. */ |
| 13283 | |
| 13284 | static bfd_boolean |
| 13285 | make_branch_to_a8_stub (struct bfd_hash_entry *gen_entry, |
| 13286 | void *in_arg) |
| 13287 | { |
| 13288 | struct elf32_arm_stub_hash_entry *stub_entry; |
| 13289 | struct a8_branch_to_stub_data *data; |
| 13290 | bfd_byte *contents; |
| 13291 | unsigned long branch_insn; |
| 13292 | bfd_vma veneered_insn_loc, veneer_entry_loc; |
| 13293 | bfd_signed_vma branch_offset; |
| 13294 | bfd *abfd; |
| 13295 | unsigned int target; |
| 13296 | |
| 13297 | stub_entry = (struct elf32_arm_stub_hash_entry *) gen_entry; |
| 13298 | data = (struct a8_branch_to_stub_data *) in_arg; |
| 13299 | |
| 13300 | if (stub_entry->target_section != data->writing_section |
| 13301 | || stub_entry->stub_type < arm_stub_a8_veneer_lwm) |
| 13302 | return TRUE; |
| 13303 | |
| 13304 | contents = data->contents; |
| 13305 | |
| 13306 | veneered_insn_loc = stub_entry->target_section->output_section->vma |
| 13307 | + stub_entry->target_section->output_offset |
| 13308 | + stub_entry->target_value; |
| 13309 | |
| 13310 | veneer_entry_loc = stub_entry->stub_sec->output_section->vma |
| 13311 | + stub_entry->stub_sec->output_offset |
| 13312 | + stub_entry->stub_offset; |
| 13313 | |
| 13314 | if (stub_entry->stub_type == arm_stub_a8_veneer_blx) |
| 13315 | veneered_insn_loc &= ~3u; |
| 13316 | |
| 13317 | branch_offset = veneer_entry_loc - veneered_insn_loc - 4; |
| 13318 | |
| 13319 | abfd = stub_entry->target_section->owner; |
| 13320 | target = stub_entry->target_value; |
| 13321 | |
| 13322 | /* We attempt to avoid this condition by setting stubs_always_after_branch |
| 13323 | in elf32_arm_size_stubs if we've enabled the Cortex-A8 erratum workaround. |
| 13324 | This check is just to be on the safe side... */ |
| 13325 | if ((veneered_insn_loc & ~0xfff) == (veneer_entry_loc & ~0xfff)) |
| 13326 | { |
| 13327 | (*_bfd_error_handler) (_("%B: error: Cortex-A8 erratum stub is " |
| 13328 | "allocated in unsafe location"), abfd); |
| 13329 | return FALSE; |
| 13330 | } |
| 13331 | |
| 13332 | switch (stub_entry->stub_type) |
| 13333 | { |
| 13334 | case arm_stub_a8_veneer_b: |
| 13335 | case arm_stub_a8_veneer_b_cond: |
| 13336 | branch_insn = 0xf0009000; |
| 13337 | goto jump24; |
| 13338 | |
| 13339 | case arm_stub_a8_veneer_blx: |
| 13340 | branch_insn = 0xf000e800; |
| 13341 | goto jump24; |
| 13342 | |
| 13343 | case arm_stub_a8_veneer_bl: |
| 13344 | { |
| 13345 | unsigned int i1, j1, i2, j2, s; |
| 13346 | |
| 13347 | branch_insn = 0xf000d000; |
| 13348 | |
| 13349 | jump24: |
| 13350 | if (branch_offset < -16777216 || branch_offset > 16777214) |
| 13351 | { |
| 13352 | /* There's not much we can do apart from complain if this |
| 13353 | happens. */ |
| 13354 | (*_bfd_error_handler) (_("%B: error: Cortex-A8 erratum stub out " |
| 13355 | "of range (input file too large)"), abfd); |
| 13356 | return FALSE; |
| 13357 | } |
| 13358 | |
| 13359 | /* i1 = not(j1 eor s), so: |
| 13360 | not i1 = j1 eor s |
| 13361 | j1 = (not i1) eor s. */ |
| 13362 | |
| 13363 | branch_insn |= (branch_offset >> 1) & 0x7ff; |
| 13364 | branch_insn |= ((branch_offset >> 12) & 0x3ff) << 16; |
| 13365 | i2 = (branch_offset >> 22) & 1; |
| 13366 | i1 = (branch_offset >> 23) & 1; |
| 13367 | s = (branch_offset >> 24) & 1; |
| 13368 | j1 = (!i1) ^ s; |
| 13369 | j2 = (!i2) ^ s; |
| 13370 | branch_insn |= j2 << 11; |
| 13371 | branch_insn |= j1 << 13; |
| 13372 | branch_insn |= s << 26; |
| 13373 | } |
| 13374 | break; |
| 13375 | |
| 13376 | default: |
| 13377 | BFD_FAIL (); |
| 13378 | return FALSE; |
| 13379 | } |
| 13380 | |
| 13381 | bfd_put_16 (abfd, (branch_insn >> 16) & 0xffff, &contents[target]); |
| 13382 | bfd_put_16 (abfd, branch_insn & 0xffff, &contents[target + 2]); |
| 13383 | |
| 13384 | return TRUE; |
| 13385 | } |
| 13386 | |
| 13387 | /* Do code byteswapping. Return FALSE afterwards so that the section is |
| 13388 | written out as normal. */ |
| 13389 | |
| 13390 | static bfd_boolean |
| 13391 | elf32_arm_write_section (bfd *output_bfd, |
| 13392 | struct bfd_link_info *link_info, |
| 13393 | asection *sec, |
| 13394 | bfd_byte *contents) |
| 13395 | { |
| 13396 | unsigned int mapcount, errcount; |
| 13397 | _arm_elf_section_data *arm_data; |
| 13398 | struct elf32_arm_link_hash_table *globals = elf32_arm_hash_table (link_info); |
| 13399 | elf32_arm_section_map *map; |
| 13400 | elf32_vfp11_erratum_list *errnode; |
| 13401 | bfd_vma ptr; |
| 13402 | bfd_vma end; |
| 13403 | bfd_vma offset = sec->output_section->vma + sec->output_offset; |
| 13404 | bfd_byte tmp; |
| 13405 | unsigned int i; |
| 13406 | |
| 13407 | if (globals == NULL) |
| 13408 | return FALSE; |
| 13409 | |
| 13410 | /* If this section has not been allocated an _arm_elf_section_data |
| 13411 | structure then we cannot record anything. */ |
| 13412 | arm_data = get_arm_elf_section_data (sec); |
| 13413 | if (arm_data == NULL) |
| 13414 | return FALSE; |
| 13415 | |
| 13416 | mapcount = arm_data->mapcount; |
| 13417 | map = arm_data->map; |
| 13418 | errcount = arm_data->erratumcount; |
| 13419 | |
| 13420 | if (errcount != 0) |
| 13421 | { |
| 13422 | unsigned int endianflip = bfd_big_endian (output_bfd) ? 3 : 0; |
| 13423 | |
| 13424 | for (errnode = arm_data->erratumlist; errnode != 0; |
| 13425 | errnode = errnode->next) |
| 13426 | { |
| 13427 | bfd_vma target = errnode->vma - offset; |
| 13428 | |
| 13429 | switch (errnode->type) |
| 13430 | { |
| 13431 | case VFP11_ERRATUM_BRANCH_TO_ARM_VENEER: |
| 13432 | { |
| 13433 | bfd_vma branch_to_veneer; |
| 13434 | /* Original condition code of instruction, plus bit mask for |
| 13435 | ARM B instruction. */ |
| 13436 | unsigned int insn = (errnode->u.b.vfp_insn & 0xf0000000) |
| 13437 | | 0x0a000000; |
| 13438 | |
| 13439 | /* The instruction is before the label. */ |
| 13440 | target -= 4; |
| 13441 | |
| 13442 | /* Above offset included in -4 below. */ |
| 13443 | branch_to_veneer = errnode->u.b.veneer->vma |
| 13444 | - errnode->vma - 4; |
| 13445 | |
| 13446 | if ((signed) branch_to_veneer < -(1 << 25) |
| 13447 | || (signed) branch_to_veneer >= (1 << 25)) |
| 13448 | (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of " |
| 13449 | "range"), output_bfd); |
| 13450 | |
| 13451 | insn |= (branch_to_veneer >> 2) & 0xffffff; |
| 13452 | contents[endianflip ^ target] = insn & 0xff; |
| 13453 | contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff; |
| 13454 | contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff; |
| 13455 | contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff; |
| 13456 | } |
| 13457 | break; |
| 13458 | |
| 13459 | case VFP11_ERRATUM_ARM_VENEER: |
| 13460 | { |
| 13461 | bfd_vma branch_from_veneer; |
| 13462 | unsigned int insn; |
| 13463 | |
| 13464 | /* Take size of veneer into account. */ |
| 13465 | branch_from_veneer = errnode->u.v.branch->vma |
| 13466 | - errnode->vma - 12; |
| 13467 | |
| 13468 | if ((signed) branch_from_veneer < -(1 << 25) |
| 13469 | || (signed) branch_from_veneer >= (1 << 25)) |
| 13470 | (*_bfd_error_handler) (_("%B: error: VFP11 veneer out of " |
| 13471 | "range"), output_bfd); |
| 13472 | |
| 13473 | /* Original instruction. */ |
| 13474 | insn = errnode->u.v.branch->u.b.vfp_insn; |
| 13475 | contents[endianflip ^ target] = insn & 0xff; |
| 13476 | contents[endianflip ^ (target + 1)] = (insn >> 8) & 0xff; |
| 13477 | contents[endianflip ^ (target + 2)] = (insn >> 16) & 0xff; |
| 13478 | contents[endianflip ^ (target + 3)] = (insn >> 24) & 0xff; |
| 13479 | |
| 13480 | /* Branch back to insn after original insn. */ |
| 13481 | insn = 0xea000000 | ((branch_from_veneer >> 2) & 0xffffff); |
| 13482 | contents[endianflip ^ (target + 4)] = insn & 0xff; |
| 13483 | contents[endianflip ^ (target + 5)] = (insn >> 8) & 0xff; |
| 13484 | contents[endianflip ^ (target + 6)] = (insn >> 16) & 0xff; |
| 13485 | contents[endianflip ^ (target + 7)] = (insn >> 24) & 0xff; |
| 13486 | } |
| 13487 | break; |
| 13488 | |
| 13489 | default: |
| 13490 | abort (); |
| 13491 | } |
| 13492 | } |
| 13493 | } |
| 13494 | |
| 13495 | if (arm_data->elf.this_hdr.sh_type == SHT_ARM_EXIDX) |
| 13496 | { |
| 13497 | arm_unwind_table_edit *edit_node |
| 13498 | = arm_data->u.exidx.unwind_edit_list; |
| 13499 | /* Now, sec->size is the size of the section we will write. The original |
| 13500 | size (before we merged duplicate entries and inserted EXIDX_CANTUNWIND |
| 13501 | markers) was sec->rawsize. (This isn't the case if we perform no |
| 13502 | edits, then rawsize will be zero and we should use size). */ |
| 13503 | bfd_byte *edited_contents = (bfd_byte *) bfd_malloc (sec->size); |
| 13504 | unsigned int input_size = sec->rawsize ? sec->rawsize : sec->size; |
| 13505 | unsigned int in_index, out_index; |
| 13506 | bfd_vma add_to_offsets = 0; |
| 13507 | |
| 13508 | for (in_index = 0, out_index = 0; in_index * 8 < input_size || edit_node;) |
| 13509 | { |
| 13510 | if (edit_node) |
| 13511 | { |
| 13512 | unsigned int edit_index = edit_node->index; |
| 13513 | |
| 13514 | if (in_index < edit_index && in_index * 8 < input_size) |
| 13515 | { |
| 13516 | copy_exidx_entry (output_bfd, edited_contents + out_index * 8, |
| 13517 | contents + in_index * 8, add_to_offsets); |
| 13518 | out_index++; |
| 13519 | in_index++; |
| 13520 | } |
| 13521 | else if (in_index == edit_index |
| 13522 | || (in_index * 8 >= input_size |
| 13523 | && edit_index == UINT_MAX)) |
| 13524 | { |
| 13525 | switch (edit_node->type) |
| 13526 | { |
| 13527 | case DELETE_EXIDX_ENTRY: |
| 13528 | in_index++; |
| 13529 | add_to_offsets += 8; |
| 13530 | break; |
| 13531 | |
| 13532 | case INSERT_EXIDX_CANTUNWIND_AT_END: |
| 13533 | { |
| 13534 | asection *text_sec = edit_node->linked_section; |
| 13535 | bfd_vma text_offset = text_sec->output_section->vma |
| 13536 | + text_sec->output_offset |
| 13537 | + text_sec->size; |
| 13538 | bfd_vma exidx_offset = offset + out_index * 8; |
| 13539 | unsigned long prel31_offset; |
| 13540 | |
| 13541 | /* Note: this is meant to be equivalent to an |
| 13542 | R_ARM_PREL31 relocation. These synthetic |
| 13543 | EXIDX_CANTUNWIND markers are not relocated by the |
| 13544 | usual BFD method. */ |
| 13545 | prel31_offset = (text_offset - exidx_offset) |
| 13546 | & 0x7ffffffful; |
| 13547 | |
| 13548 | /* First address we can't unwind. */ |
| 13549 | bfd_put_32 (output_bfd, prel31_offset, |
| 13550 | &edited_contents[out_index * 8]); |
| 13551 | |
| 13552 | /* Code for EXIDX_CANTUNWIND. */ |
| 13553 | bfd_put_32 (output_bfd, 0x1, |
| 13554 | &edited_contents[out_index * 8 + 4]); |
| 13555 | |
| 13556 | out_index++; |
| 13557 | add_to_offsets -= 8; |
| 13558 | } |
| 13559 | break; |
| 13560 | } |
| 13561 | |
| 13562 | edit_node = edit_node->next; |
| 13563 | } |
| 13564 | } |
| 13565 | else |
| 13566 | { |
| 13567 | /* No more edits, copy remaining entries verbatim. */ |
| 13568 | copy_exidx_entry (output_bfd, edited_contents + out_index * 8, |
| 13569 | contents + in_index * 8, add_to_offsets); |
| 13570 | out_index++; |
| 13571 | in_index++; |
| 13572 | } |
| 13573 | } |
| 13574 | |
| 13575 | if (!(sec->flags & SEC_EXCLUDE) && !(sec->flags & SEC_NEVER_LOAD)) |
| 13576 | bfd_set_section_contents (output_bfd, sec->output_section, |
| 13577 | edited_contents, |
| 13578 | (file_ptr) sec->output_offset, sec->size); |
| 13579 | |
| 13580 | return TRUE; |
| 13581 | } |
| 13582 | |
| 13583 | /* Fix code to point to Cortex-A8 erratum stubs. */ |
| 13584 | if (globals->fix_cortex_a8) |
| 13585 | { |
| 13586 | struct a8_branch_to_stub_data data; |
| 13587 | |
| 13588 | data.writing_section = sec; |
| 13589 | data.contents = contents; |
| 13590 | |
| 13591 | bfd_hash_traverse (&globals->stub_hash_table, make_branch_to_a8_stub, |
| 13592 | &data); |
| 13593 | } |
| 13594 | |
| 13595 | if (mapcount == 0) |
| 13596 | return FALSE; |
| 13597 | |
| 13598 | if (globals->byteswap_code) |
| 13599 | { |
| 13600 | qsort (map, mapcount, sizeof (* map), elf32_arm_compare_mapping); |
| 13601 | |
| 13602 | ptr = map[0].vma; |
| 13603 | for (i = 0; i < mapcount; i++) |
| 13604 | { |
| 13605 | if (i == mapcount - 1) |
| 13606 | end = sec->size; |
| 13607 | else |
| 13608 | end = map[i + 1].vma; |
| 13609 | |
| 13610 | switch (map[i].type) |
| 13611 | { |
| 13612 | case 'a': |
| 13613 | /* Byte swap code words. */ |
| 13614 | while (ptr + 3 < end) |
| 13615 | { |
| 13616 | tmp = contents[ptr]; |
| 13617 | contents[ptr] = contents[ptr + 3]; |
| 13618 | contents[ptr + 3] = tmp; |
| 13619 | tmp = contents[ptr + 1]; |
| 13620 | contents[ptr + 1] = contents[ptr + 2]; |
| 13621 | contents[ptr + 2] = tmp; |
| 13622 | ptr += 4; |
| 13623 | } |
| 13624 | break; |
| 13625 | |
| 13626 | case 't': |
| 13627 | /* Byte swap code halfwords. */ |
| 13628 | while (ptr + 1 < end) |
| 13629 | { |
| 13630 | tmp = contents[ptr]; |
| 13631 | contents[ptr] = contents[ptr + 1]; |
| 13632 | contents[ptr + 1] = tmp; |
| 13633 | ptr += 2; |
| 13634 | } |
| 13635 | break; |
| 13636 | |
| 13637 | case 'd': |
| 13638 | /* Leave data alone. */ |
| 13639 | break; |
| 13640 | } |
| 13641 | ptr = end; |
| 13642 | } |
| 13643 | } |
| 13644 | |
| 13645 | free (map); |
| 13646 | arm_data->mapcount = -1; |
| 13647 | arm_data->mapsize = 0; |
| 13648 | arm_data->map = NULL; |
| 13649 | |
| 13650 | return FALSE; |
| 13651 | } |
| 13652 | |
| 13653 | /* Display STT_ARM_TFUNC symbols as functions. */ |
| 13654 | |
| 13655 | static void |
| 13656 | elf32_arm_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
| 13657 | asymbol *asym) |
| 13658 | { |
| 13659 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; |
| 13660 | |
| 13661 | if (ELF_ST_TYPE (elfsym->internal_elf_sym.st_info) == STT_ARM_TFUNC) |
| 13662 | elfsym->symbol.flags |= BSF_FUNCTION; |
| 13663 | } |
| 13664 | |
| 13665 | |
| 13666 | /* Mangle thumb function symbols as we read them in. */ |
| 13667 | |
| 13668 | static bfd_boolean |
| 13669 | elf32_arm_swap_symbol_in (bfd * abfd, |
| 13670 | const void *psrc, |
| 13671 | const void *pshn, |
| 13672 | Elf_Internal_Sym *dst) |
| 13673 | { |
| 13674 | if (!bfd_elf32_swap_symbol_in (abfd, psrc, pshn, dst)) |
| 13675 | return FALSE; |
| 13676 | |
| 13677 | /* New EABI objects mark thumb function symbols by setting the low bit of |
| 13678 | the address. Turn these into STT_ARM_TFUNC. */ |
| 13679 | if ((ELF_ST_TYPE (dst->st_info) == STT_FUNC) |
| 13680 | && (dst->st_value & 1)) |
| 13681 | { |
| 13682 | dst->st_info = ELF_ST_INFO (ELF_ST_BIND (dst->st_info), STT_ARM_TFUNC); |
| 13683 | dst->st_value &= ~(bfd_vma) 1; |
| 13684 | } |
| 13685 | return TRUE; |
| 13686 | } |
| 13687 | |
| 13688 | |
| 13689 | /* Mangle thumb function symbols as we write them out. */ |
| 13690 | |
| 13691 | static void |
| 13692 | elf32_arm_swap_symbol_out (bfd *abfd, |
| 13693 | const Elf_Internal_Sym *src, |
| 13694 | void *cdst, |
| 13695 | void *shndx) |
| 13696 | { |
| 13697 | Elf_Internal_Sym newsym; |
| 13698 | |
| 13699 | /* We convert STT_ARM_TFUNC symbols into STT_FUNC with the low bit |
| 13700 | of the address set, as per the new EABI. We do this unconditionally |
| 13701 | because objcopy does not set the elf header flags until after |
| 13702 | it writes out the symbol table. */ |
| 13703 | if (ELF_ST_TYPE (src->st_info) == STT_ARM_TFUNC) |
| 13704 | { |
| 13705 | newsym = *src; |
| 13706 | newsym.st_info = ELF_ST_INFO (ELF_ST_BIND (src->st_info), STT_FUNC); |
| 13707 | if (newsym.st_shndx != SHN_UNDEF) |
| 13708 | { |
| 13709 | /* Do this only for defined symbols. At link type, the static |
| 13710 | linker will simulate the work of dynamic linker of resolving |
| 13711 | symbols and will carry over the thumbness of found symbols to |
| 13712 | the output symbol table. It's not clear how it happens, but |
| 13713 | the thumbness of undefined symbols can well be different at |
| 13714 | runtime, and writing '1' for them will be confusing for users |
| 13715 | and possibly for dynamic linker itself. |
| 13716 | */ |
| 13717 | newsym.st_value |= 1; |
| 13718 | } |
| 13719 | |
| 13720 | src = &newsym; |
| 13721 | } |
| 13722 | bfd_elf32_swap_symbol_out (abfd, src, cdst, shndx); |
| 13723 | } |
| 13724 | |
| 13725 | /* Add the PT_ARM_EXIDX program header. */ |
| 13726 | |
| 13727 | static bfd_boolean |
| 13728 | elf32_arm_modify_segment_map (bfd *abfd, |
| 13729 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 13730 | { |
| 13731 | struct elf_segment_map *m; |
| 13732 | asection *sec; |
| 13733 | |
| 13734 | sec = bfd_get_section_by_name (abfd, ".ARM.exidx"); |
| 13735 | if (sec != NULL && (sec->flags & SEC_LOAD) != 0) |
| 13736 | { |
| 13737 | /* If there is already a PT_ARM_EXIDX header, then we do not |
| 13738 | want to add another one. This situation arises when running |
| 13739 | "strip"; the input binary already has the header. */ |
| 13740 | m = elf_tdata (abfd)->segment_map; |
| 13741 | while (m && m->p_type != PT_ARM_EXIDX) |
| 13742 | m = m->next; |
| 13743 | if (!m) |
| 13744 | { |
| 13745 | m = (struct elf_segment_map *) |
| 13746 | bfd_zalloc (abfd, sizeof (struct elf_segment_map)); |
| 13747 | if (m == NULL) |
| 13748 | return FALSE; |
| 13749 | m->p_type = PT_ARM_EXIDX; |
| 13750 | m->count = 1; |
| 13751 | m->sections[0] = sec; |
| 13752 | |
| 13753 | m->next = elf_tdata (abfd)->segment_map; |
| 13754 | elf_tdata (abfd)->segment_map = m; |
| 13755 | } |
| 13756 | } |
| 13757 | |
| 13758 | return TRUE; |
| 13759 | } |
| 13760 | |
| 13761 | /* We may add a PT_ARM_EXIDX program header. */ |
| 13762 | |
| 13763 | static int |
| 13764 | elf32_arm_additional_program_headers (bfd *abfd, |
| 13765 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 13766 | { |
| 13767 | asection *sec; |
| 13768 | |
| 13769 | sec = bfd_get_section_by_name (abfd, ".ARM.exidx"); |
| 13770 | if (sec != NULL && (sec->flags & SEC_LOAD) != 0) |
| 13771 | return 1; |
| 13772 | else |
| 13773 | return 0; |
| 13774 | } |
| 13775 | |
| 13776 | /* We have two function types: STT_FUNC and STT_ARM_TFUNC. */ |
| 13777 | |
| 13778 | static bfd_boolean |
| 13779 | elf32_arm_is_function_type (unsigned int type) |
| 13780 | { |
| 13781 | return (type == STT_FUNC) || (type == STT_ARM_TFUNC); |
| 13782 | } |
| 13783 | |
| 13784 | /* We use this to override swap_symbol_in and swap_symbol_out. */ |
| 13785 | const struct elf_size_info elf32_arm_size_info = |
| 13786 | { |
| 13787 | sizeof (Elf32_External_Ehdr), |
| 13788 | sizeof (Elf32_External_Phdr), |
| 13789 | sizeof (Elf32_External_Shdr), |
| 13790 | sizeof (Elf32_External_Rel), |
| 13791 | sizeof (Elf32_External_Rela), |
| 13792 | sizeof (Elf32_External_Sym), |
| 13793 | sizeof (Elf32_External_Dyn), |
| 13794 | sizeof (Elf_External_Note), |
| 13795 | 4, |
| 13796 | 1, |
| 13797 | 32, 2, |
| 13798 | ELFCLASS32, EV_CURRENT, |
| 13799 | bfd_elf32_write_out_phdrs, |
| 13800 | bfd_elf32_write_shdrs_and_ehdr, |
| 13801 | bfd_elf32_checksum_contents, |
| 13802 | bfd_elf32_write_relocs, |
| 13803 | elf32_arm_swap_symbol_in, |
| 13804 | elf32_arm_swap_symbol_out, |
| 13805 | bfd_elf32_slurp_reloc_table, |
| 13806 | bfd_elf32_slurp_symbol_table, |
| 13807 | bfd_elf32_swap_dyn_in, |
| 13808 | bfd_elf32_swap_dyn_out, |
| 13809 | bfd_elf32_swap_reloc_in, |
| 13810 | bfd_elf32_swap_reloc_out, |
| 13811 | bfd_elf32_swap_reloca_in, |
| 13812 | bfd_elf32_swap_reloca_out |
| 13813 | }; |
| 13814 | |
| 13815 | #define ELF_ARCH bfd_arch_arm |
| 13816 | #define ELF_TARGET_ID ARM_ELF_DATA |
| 13817 | #define ELF_MACHINE_CODE EM_ARM |
| 13818 | #ifdef __QNXTARGET__ |
| 13819 | #define ELF_MAXPAGESIZE 0x1000 |
| 13820 | #else |
| 13821 | #define ELF_MAXPAGESIZE 0x8000 |
| 13822 | #endif |
| 13823 | #define ELF_MINPAGESIZE 0x1000 |
| 13824 | #define ELF_COMMONPAGESIZE 0x1000 |
| 13825 | |
| 13826 | #define bfd_elf32_mkobject elf32_arm_mkobject |
| 13827 | |
| 13828 | #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data |
| 13829 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data |
| 13830 | #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags |
| 13831 | #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data |
| 13832 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create |
| 13833 | #define bfd_elf32_bfd_link_hash_table_free elf32_arm_hash_table_free |
| 13834 | #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup |
| 13835 | #define bfd_elf32_bfd_reloc_name_lookup elf32_arm_reloc_name_lookup |
| 13836 | #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line |
| 13837 | #define bfd_elf32_find_inliner_info elf32_arm_find_inliner_info |
| 13838 | #define bfd_elf32_new_section_hook elf32_arm_new_section_hook |
| 13839 | #define bfd_elf32_bfd_is_target_special_symbol elf32_arm_is_target_special_symbol |
| 13840 | #define bfd_elf32_bfd_final_link elf32_arm_final_link |
| 13841 | |
| 13842 | #define elf_backend_get_symbol_type elf32_arm_get_symbol_type |
| 13843 | #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook |
| 13844 | #define elf_backend_gc_mark_extra_sections elf32_arm_gc_mark_extra_sections |
| 13845 | #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook |
| 13846 | #define elf_backend_check_relocs elf32_arm_check_relocs |
| 13847 | #define elf_backend_relocate_section elf32_arm_relocate_section |
| 13848 | #define elf_backend_write_section elf32_arm_write_section |
| 13849 | #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol |
| 13850 | #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections |
| 13851 | #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol |
| 13852 | #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections |
| 13853 | #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections |
| 13854 | #define elf_backend_init_index_section _bfd_elf_init_2_index_sections |
| 13855 | #define elf_backend_post_process_headers elf32_arm_post_process_headers |
| 13856 | #define elf_backend_reloc_type_class elf32_arm_reloc_type_class |
| 13857 | #define elf_backend_object_p elf32_arm_object_p |
| 13858 | #define elf_backend_section_flags elf32_arm_section_flags |
| 13859 | #define elf_backend_fake_sections elf32_arm_fake_sections |
| 13860 | #define elf_backend_section_from_shdr elf32_arm_section_from_shdr |
| 13861 | #define elf_backend_final_write_processing elf32_arm_final_write_processing |
| 13862 | #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol |
| 13863 | #define elf_backend_symbol_processing elf32_arm_symbol_processing |
| 13864 | #define elf_backend_size_info elf32_arm_size_info |
| 13865 | #define elf_backend_modify_segment_map elf32_arm_modify_segment_map |
| 13866 | #define elf_backend_additional_program_headers elf32_arm_additional_program_headers |
| 13867 | #define elf_backend_output_arch_local_syms elf32_arm_output_arch_local_syms |
| 13868 | #define elf_backend_begin_write_processing elf32_arm_begin_write_processing |
| 13869 | #define elf_backend_is_function_type elf32_arm_is_function_type |
| 13870 | |
| 13871 | #define elf_backend_can_refcount 1 |
| 13872 | #define elf_backend_can_gc_sections 1 |
| 13873 | #define elf_backend_plt_readonly 1 |
| 13874 | #define elf_backend_want_got_plt 1 |
| 13875 | #define elf_backend_want_plt_sym 0 |
| 13876 | #define elf_backend_may_use_rel_p 1 |
| 13877 | #define elf_backend_may_use_rela_p 0 |
| 13878 | #define elf_backend_default_use_rela_p 0 |
| 13879 | |
| 13880 | #define elf_backend_got_header_size 12 |
| 13881 | |
| 13882 | #undef elf_backend_obj_attrs_vendor |
| 13883 | #define elf_backend_obj_attrs_vendor "aeabi" |
| 13884 | #undef elf_backend_obj_attrs_section |
| 13885 | #define elf_backend_obj_attrs_section ".ARM.attributes" |
| 13886 | #undef elf_backend_obj_attrs_arg_type |
| 13887 | #define elf_backend_obj_attrs_arg_type elf32_arm_obj_attrs_arg_type |
| 13888 | #undef elf_backend_obj_attrs_section_type |
| 13889 | #define elf_backend_obj_attrs_section_type SHT_ARM_ATTRIBUTES |
| 13890 | #define elf_backend_obj_attrs_order elf32_arm_obj_attrs_order |
| 13891 | #define elf_backend_obj_attrs_handle_unknown elf32_arm_obj_attrs_handle_unknown |
| 13892 | |
| 13893 | #include "elf32-target.h" |
| 13894 | |
| 13895 | /* VxWorks Targets. */ |
| 13896 | |
| 13897 | #undef TARGET_LITTLE_SYM |
| 13898 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_vxworks_vec |
| 13899 | #undef TARGET_LITTLE_NAME |
| 13900 | #define TARGET_LITTLE_NAME "elf32-littlearm-vxworks" |
| 13901 | #undef TARGET_BIG_SYM |
| 13902 | #define TARGET_BIG_SYM bfd_elf32_bigarm_vxworks_vec |
| 13903 | #undef TARGET_BIG_NAME |
| 13904 | #define TARGET_BIG_NAME "elf32-bigarm-vxworks" |
| 13905 | |
| 13906 | /* Like elf32_arm_link_hash_table_create -- but overrides |
| 13907 | appropriately for VxWorks. */ |
| 13908 | |
| 13909 | static struct bfd_link_hash_table * |
| 13910 | elf32_arm_vxworks_link_hash_table_create (bfd *abfd) |
| 13911 | { |
| 13912 | struct bfd_link_hash_table *ret; |
| 13913 | |
| 13914 | ret = elf32_arm_link_hash_table_create (abfd); |
| 13915 | if (ret) |
| 13916 | { |
| 13917 | struct elf32_arm_link_hash_table *htab |
| 13918 | = (struct elf32_arm_link_hash_table *) ret; |
| 13919 | htab->use_rel = 0; |
| 13920 | htab->vxworks_p = 1; |
| 13921 | } |
| 13922 | return ret; |
| 13923 | } |
| 13924 | |
| 13925 | static void |
| 13926 | elf32_arm_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker) |
| 13927 | { |
| 13928 | elf32_arm_final_write_processing (abfd, linker); |
| 13929 | elf_vxworks_final_write_processing (abfd, linker); |
| 13930 | } |
| 13931 | |
| 13932 | #undef elf32_bed |
| 13933 | #define elf32_bed elf32_arm_vxworks_bed |
| 13934 | |
| 13935 | #undef bfd_elf32_bfd_link_hash_table_create |
| 13936 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_vxworks_link_hash_table_create |
| 13937 | #undef elf_backend_add_symbol_hook |
| 13938 | #define elf_backend_add_symbol_hook elf_vxworks_add_symbol_hook |
| 13939 | #undef elf_backend_final_write_processing |
| 13940 | #define elf_backend_final_write_processing elf32_arm_vxworks_final_write_processing |
| 13941 | #undef elf_backend_emit_relocs |
| 13942 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs |
| 13943 | |
| 13944 | #undef elf_backend_may_use_rel_p |
| 13945 | #define elf_backend_may_use_rel_p 0 |
| 13946 | #undef elf_backend_may_use_rela_p |
| 13947 | #define elf_backend_may_use_rela_p 1 |
| 13948 | #undef elf_backend_default_use_rela_p |
| 13949 | #define elf_backend_default_use_rela_p 1 |
| 13950 | #undef elf_backend_want_plt_sym |
| 13951 | #define elf_backend_want_plt_sym 1 |
| 13952 | #undef ELF_MAXPAGESIZE |
| 13953 | #define ELF_MAXPAGESIZE 0x1000 |
| 13954 | |
| 13955 | #include "elf32-target.h" |
| 13956 | |
| 13957 | |
| 13958 | /* Merge backend specific data from an object file to the output |
| 13959 | object file when linking. */ |
| 13960 | |
| 13961 | static bfd_boolean |
| 13962 | elf32_arm_merge_private_bfd_data (bfd * ibfd, bfd * obfd) |
| 13963 | { |
| 13964 | flagword out_flags; |
| 13965 | flagword in_flags; |
| 13966 | bfd_boolean flags_compatible = TRUE; |
| 13967 | asection *sec; |
| 13968 | |
| 13969 | /* Check if we have the same endianess. */ |
| 13970 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
| 13971 | return FALSE; |
| 13972 | |
| 13973 | if (! is_arm_elf (ibfd) || ! is_arm_elf (obfd)) |
| 13974 | return TRUE; |
| 13975 | |
| 13976 | if (!elf32_arm_merge_eabi_attributes (ibfd, obfd)) |
| 13977 | return FALSE; |
| 13978 | |
| 13979 | /* The input BFD must have had its flags initialised. */ |
| 13980 | /* The following seems bogus to me -- The flags are initialized in |
| 13981 | the assembler but I don't think an elf_flags_init field is |
| 13982 | written into the object. */ |
| 13983 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
| 13984 | |
| 13985 | in_flags = elf_elfheader (ibfd)->e_flags; |
| 13986 | out_flags = elf_elfheader (obfd)->e_flags; |
| 13987 | |
| 13988 | /* In theory there is no reason why we couldn't handle this. However |
| 13989 | in practice it isn't even close to working and there is no real |
| 13990 | reason to want it. */ |
| 13991 | if (EF_ARM_EABI_VERSION (in_flags) >= EF_ARM_EABI_VER4 |
| 13992 | && !(ibfd->flags & DYNAMIC) |
| 13993 | && (in_flags & EF_ARM_BE8)) |
| 13994 | { |
| 13995 | _bfd_error_handler (_("error: %B is already in final BE8 format"), |
| 13996 | ibfd); |
| 13997 | return FALSE; |
| 13998 | } |
| 13999 | |
| 14000 | if (!elf_flags_init (obfd)) |
| 14001 | { |
| 14002 | /* If the input is the default architecture and had the default |
| 14003 | flags then do not bother setting the flags for the output |
| 14004 | architecture, instead allow future merges to do this. If no |
| 14005 | future merges ever set these flags then they will retain their |
| 14006 | uninitialised values, which surprise surprise, correspond |
| 14007 | to the default values. */ |
| 14008 | if (bfd_get_arch_info (ibfd)->the_default |
| 14009 | && elf_elfheader (ibfd)->e_flags == 0) |
| 14010 | return TRUE; |
| 14011 | |
| 14012 | elf_flags_init (obfd) = TRUE; |
| 14013 | elf_elfheader (obfd)->e_flags = in_flags; |
| 14014 | |
| 14015 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| 14016 | && bfd_get_arch_info (obfd)->the_default) |
| 14017 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); |
| 14018 | |
| 14019 | return TRUE; |
| 14020 | } |
| 14021 | |
| 14022 | /* Determine what should happen if the input ARM architecture |
| 14023 | does not match the output ARM architecture. */ |
| 14024 | if (! bfd_arm_merge_machines (ibfd, obfd)) |
| 14025 | return FALSE; |
| 14026 | |
| 14027 | /* Identical flags must be compatible. */ |
| 14028 | if (in_flags == out_flags) |
| 14029 | return TRUE; |
| 14030 | |
| 14031 | /* Check to see if the input BFD actually contains any sections. If |
| 14032 | not, its flags may not have been initialised either, but it |
| 14033 | cannot actually cause any incompatiblity. Do not short-circuit |
| 14034 | dynamic objects; their section list may be emptied by |
| 14035 | elf_link_add_object_symbols. |
| 14036 | |
| 14037 | Also check to see if there are no code sections in the input. |
| 14038 | In this case there is no need to check for code specific flags. |
| 14039 | XXX - do we need to worry about floating-point format compatability |
| 14040 | in data sections ? */ |
| 14041 | if (!(ibfd->flags & DYNAMIC)) |
| 14042 | { |
| 14043 | bfd_boolean null_input_bfd = TRUE; |
| 14044 | bfd_boolean only_data_sections = TRUE; |
| 14045 | |
| 14046 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| 14047 | { |
| 14048 | /* Ignore synthetic glue sections. */ |
| 14049 | if (strcmp (sec->name, ".glue_7") |
| 14050 | && strcmp (sec->name, ".glue_7t")) |
| 14051 | { |
| 14052 | if ((bfd_get_section_flags (ibfd, sec) |
| 14053 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 14054 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
| 14055 | only_data_sections = FALSE; |
| 14056 | |
| 14057 | null_input_bfd = FALSE; |
| 14058 | break; |
| 14059 | } |
| 14060 | } |
| 14061 | |
| 14062 | if (null_input_bfd || only_data_sections) |
| 14063 | return TRUE; |
| 14064 | } |
| 14065 | |
| 14066 | /* Complain about various flag mismatches. */ |
| 14067 | if (!elf32_arm_versions_compatible (EF_ARM_EABI_VERSION (in_flags), |
| 14068 | EF_ARM_EABI_VERSION (out_flags))) |
| 14069 | { |
| 14070 | _bfd_error_handler |
| 14071 | (_("error: Source object %B has EABI version %d, but target %B has EABI version %d"), |
| 14072 | ibfd, obfd, |
| 14073 | (in_flags & EF_ARM_EABIMASK) >> 24, |
| 14074 | (out_flags & EF_ARM_EABIMASK) >> 24); |
| 14075 | return FALSE; |
| 14076 | } |
| 14077 | |
| 14078 | /* Not sure what needs to be checked for EABI versions >= 1. */ |
| 14079 | /* VxWorks libraries do not use these flags. */ |
| 14080 | if (get_elf_backend_data (obfd) != &elf32_arm_vxworks_bed |
| 14081 | && get_elf_backend_data (ibfd) != &elf32_arm_vxworks_bed |
| 14082 | && EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN) |
| 14083 | { |
| 14084 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
| 14085 | { |
| 14086 | _bfd_error_handler |
| 14087 | (_("error: %B is compiled for APCS-%d, whereas target %B uses APCS-%d"), |
| 14088 | ibfd, obfd, |
| 14089 | in_flags & EF_ARM_APCS_26 ? 26 : 32, |
| 14090 | out_flags & EF_ARM_APCS_26 ? 26 : 32); |
| 14091 | flags_compatible = FALSE; |
| 14092 | } |
| 14093 | |
| 14094 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
| 14095 | { |
| 14096 | if (in_flags & EF_ARM_APCS_FLOAT) |
| 14097 | _bfd_error_handler |
| 14098 | (_("error: %B passes floats in float registers, whereas %B passes them in integer registers"), |
| 14099 | ibfd, obfd); |
| 14100 | else |
| 14101 | _bfd_error_handler |
| 14102 | (_("error: %B passes floats in integer registers, whereas %B passes them in float registers"), |
| 14103 | ibfd, obfd); |
| 14104 | |
| 14105 | flags_compatible = FALSE; |
| 14106 | } |
| 14107 | |
| 14108 | if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT)) |
| 14109 | { |
| 14110 | if (in_flags & EF_ARM_VFP_FLOAT) |
| 14111 | _bfd_error_handler |
| 14112 | (_("error: %B uses VFP instructions, whereas %B does not"), |
| 14113 | ibfd, obfd); |
| 14114 | else |
| 14115 | _bfd_error_handler |
| 14116 | (_("error: %B uses FPA instructions, whereas %B does not"), |
| 14117 | ibfd, obfd); |
| 14118 | |
| 14119 | flags_compatible = FALSE; |
| 14120 | } |
| 14121 | |
| 14122 | if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT)) |
| 14123 | { |
| 14124 | if (in_flags & EF_ARM_MAVERICK_FLOAT) |
| 14125 | _bfd_error_handler |
| 14126 | (_("error: %B uses Maverick instructions, whereas %B does not"), |
| 14127 | ibfd, obfd); |
| 14128 | else |
| 14129 | _bfd_error_handler |
| 14130 | (_("error: %B does not use Maverick instructions, whereas %B does"), |
| 14131 | ibfd, obfd); |
| 14132 | |
| 14133 | flags_compatible = FALSE; |
| 14134 | } |
| 14135 | |
| 14136 | #ifdef EF_ARM_SOFT_FLOAT |
| 14137 | if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT)) |
| 14138 | { |
| 14139 | /* We can allow interworking between code that is VFP format |
| 14140 | layout, and uses either soft float or integer regs for |
| 14141 | passing floating point arguments and results. We already |
| 14142 | know that the APCS_FLOAT flags match; similarly for VFP |
| 14143 | flags. */ |
| 14144 | if ((in_flags & EF_ARM_APCS_FLOAT) != 0 |
| 14145 | || (in_flags & EF_ARM_VFP_FLOAT) == 0) |
| 14146 | { |
| 14147 | if (in_flags & EF_ARM_SOFT_FLOAT) |
| 14148 | _bfd_error_handler |
| 14149 | (_("error: %B uses software FP, whereas %B uses hardware FP"), |
| 14150 | ibfd, obfd); |
| 14151 | else |
| 14152 | _bfd_error_handler |
| 14153 | (_("error: %B uses hardware FP, whereas %B uses software FP"), |
| 14154 | ibfd, obfd); |
| 14155 | |
| 14156 | flags_compatible = FALSE; |
| 14157 | } |
| 14158 | } |
| 14159 | #endif |
| 14160 | |
| 14161 | /* Interworking mismatch is only a warning. */ |
| 14162 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
| 14163 | { |
| 14164 | if (in_flags & EF_ARM_INTERWORK) |
| 14165 | { |
| 14166 | _bfd_error_handler |
| 14167 | (_("Warning: %B supports interworking, whereas %B does not"), |
| 14168 | ibfd, obfd); |
| 14169 | } |
| 14170 | else |
| 14171 | { |
| 14172 | _bfd_error_handler |
| 14173 | (_("Warning: %B does not support interworking, whereas %B does"), |
| 14174 | ibfd, obfd); |
| 14175 | } |
| 14176 | } |
| 14177 | } |
| 14178 | |
| 14179 | return flags_compatible; |
| 14180 | } |
| 14181 | |
| 14182 | |
| 14183 | /* Symbian OS Targets. */ |
| 14184 | |
| 14185 | #undef TARGET_LITTLE_SYM |
| 14186 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_symbian_vec |
| 14187 | #undef TARGET_LITTLE_NAME |
| 14188 | #define TARGET_LITTLE_NAME "elf32-littlearm-symbian" |
| 14189 | #undef TARGET_BIG_SYM |
| 14190 | #define TARGET_BIG_SYM bfd_elf32_bigarm_symbian_vec |
| 14191 | #undef TARGET_BIG_NAME |
| 14192 | #define TARGET_BIG_NAME "elf32-bigarm-symbian" |
| 14193 | |
| 14194 | /* Like elf32_arm_link_hash_table_create -- but overrides |
| 14195 | appropriately for Symbian OS. */ |
| 14196 | |
| 14197 | static struct bfd_link_hash_table * |
| 14198 | elf32_arm_symbian_link_hash_table_create (bfd *abfd) |
| 14199 | { |
| 14200 | struct bfd_link_hash_table *ret; |
| 14201 | |
| 14202 | ret = elf32_arm_link_hash_table_create (abfd); |
| 14203 | if (ret) |
| 14204 | { |
| 14205 | struct elf32_arm_link_hash_table *htab |
| 14206 | = (struct elf32_arm_link_hash_table *)ret; |
| 14207 | /* There is no PLT header for Symbian OS. */ |
| 14208 | htab->plt_header_size = 0; |
| 14209 | /* The PLT entries are each one instruction and one word. */ |
| 14210 | htab->plt_entry_size = 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry); |
| 14211 | htab->symbian_p = 1; |
| 14212 | /* Symbian uses armv5t or above, so use_blx is always true. */ |
| 14213 | htab->use_blx = 1; |
| 14214 | htab->root.is_relocatable_executable = 1; |
| 14215 | } |
| 14216 | return ret; |
| 14217 | } |
| 14218 | |
| 14219 | static const struct bfd_elf_special_section |
| 14220 | elf32_arm_symbian_special_sections[] = |
| 14221 | { |
| 14222 | /* In a BPABI executable, the dynamic linking sections do not go in |
| 14223 | the loadable read-only segment. The post-linker may wish to |
| 14224 | refer to these sections, but they are not part of the final |
| 14225 | program image. */ |
| 14226 | { STRING_COMMA_LEN (".dynamic"), 0, SHT_DYNAMIC, 0 }, |
| 14227 | { STRING_COMMA_LEN (".dynstr"), 0, SHT_STRTAB, 0 }, |
| 14228 | { STRING_COMMA_LEN (".dynsym"), 0, SHT_DYNSYM, 0 }, |
| 14229 | { STRING_COMMA_LEN (".got"), 0, SHT_PROGBITS, 0 }, |
| 14230 | { STRING_COMMA_LEN (".hash"), 0, SHT_HASH, 0 }, |
| 14231 | /* These sections do not need to be writable as the SymbianOS |
| 14232 | postlinker will arrange things so that no dynamic relocation is |
| 14233 | required. */ |
| 14234 | { STRING_COMMA_LEN (".init_array"), 0, SHT_INIT_ARRAY, SHF_ALLOC }, |
| 14235 | { STRING_COMMA_LEN (".fini_array"), 0, SHT_FINI_ARRAY, SHF_ALLOC }, |
| 14236 | { STRING_COMMA_LEN (".preinit_array"), 0, SHT_PREINIT_ARRAY, SHF_ALLOC }, |
| 14237 | { NULL, 0, 0, 0, 0 } |
| 14238 | }; |
| 14239 | |
| 14240 | static void |
| 14241 | elf32_arm_symbian_begin_write_processing (bfd *abfd, |
| 14242 | struct bfd_link_info *link_info) |
| 14243 | { |
| 14244 | /* BPABI objects are never loaded directly by an OS kernel; they are |
| 14245 | processed by a postlinker first, into an OS-specific format. If |
| 14246 | the D_PAGED bit is set on the file, BFD will align segments on |
| 14247 | page boundaries, so that an OS can directly map the file. With |
| 14248 | BPABI objects, that just results in wasted space. In addition, |
| 14249 | because we clear the D_PAGED bit, map_sections_to_segments will |
| 14250 | recognize that the program headers should not be mapped into any |
| 14251 | loadable segment. */ |
| 14252 | abfd->flags &= ~D_PAGED; |
| 14253 | elf32_arm_begin_write_processing (abfd, link_info); |
| 14254 | } |
| 14255 | |
| 14256 | static bfd_boolean |
| 14257 | elf32_arm_symbian_modify_segment_map (bfd *abfd, |
| 14258 | struct bfd_link_info *info) |
| 14259 | { |
| 14260 | struct elf_segment_map *m; |
| 14261 | asection *dynsec; |
| 14262 | |
| 14263 | /* BPABI shared libraries and executables should have a PT_DYNAMIC |
| 14264 | segment. However, because the .dynamic section is not marked |
| 14265 | with SEC_LOAD, the generic ELF code will not create such a |
| 14266 | segment. */ |
| 14267 | dynsec = bfd_get_section_by_name (abfd, ".dynamic"); |
| 14268 | if (dynsec) |
| 14269 | { |
| 14270 | for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next) |
| 14271 | if (m->p_type == PT_DYNAMIC) |
| 14272 | break; |
| 14273 | |
| 14274 | if (m == NULL) |
| 14275 | { |
| 14276 | m = _bfd_elf_make_dynamic_segment (abfd, dynsec); |
| 14277 | m->next = elf_tdata (abfd)->segment_map; |
| 14278 | elf_tdata (abfd)->segment_map = m; |
| 14279 | } |
| 14280 | } |
| 14281 | |
| 14282 | /* Also call the generic arm routine. */ |
| 14283 | return elf32_arm_modify_segment_map (abfd, info); |
| 14284 | } |
| 14285 | |
| 14286 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 14287 | or (bfd_vma) -1 if it should not be included. */ |
| 14288 | |
| 14289 | static bfd_vma |
| 14290 | elf32_arm_symbian_plt_sym_val (bfd_vma i, const asection *plt, |
| 14291 | const arelent *rel ATTRIBUTE_UNUSED) |
| 14292 | { |
| 14293 | return plt->vma + 4 * ARRAY_SIZE (elf32_arm_symbian_plt_entry) * i; |
| 14294 | } |
| 14295 | |
| 14296 | |
| 14297 | #undef elf32_bed |
| 14298 | #define elf32_bed elf32_arm_symbian_bed |
| 14299 | |
| 14300 | /* The dynamic sections are not allocated on SymbianOS; the postlinker |
| 14301 | will process them and then discard them. */ |
| 14302 | #undef ELF_DYNAMIC_SEC_FLAGS |
| 14303 | #define ELF_DYNAMIC_SEC_FLAGS \ |
| 14304 | (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED) |
| 14305 | |
| 14306 | #undef elf_backend_add_symbol_hook |
| 14307 | #undef elf_backend_emit_relocs |
| 14308 | |
| 14309 | #undef bfd_elf32_bfd_link_hash_table_create |
| 14310 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_symbian_link_hash_table_create |
| 14311 | #undef elf_backend_special_sections |
| 14312 | #define elf_backend_special_sections elf32_arm_symbian_special_sections |
| 14313 | #undef elf_backend_begin_write_processing |
| 14314 | #define elf_backend_begin_write_processing elf32_arm_symbian_begin_write_processing |
| 14315 | #undef elf_backend_final_write_processing |
| 14316 | #define elf_backend_final_write_processing elf32_arm_final_write_processing |
| 14317 | |
| 14318 | #undef elf_backend_modify_segment_map |
| 14319 | #define elf_backend_modify_segment_map elf32_arm_symbian_modify_segment_map |
| 14320 | |
| 14321 | /* There is no .got section for BPABI objects, and hence no header. */ |
| 14322 | #undef elf_backend_got_header_size |
| 14323 | #define elf_backend_got_header_size 0 |
| 14324 | |
| 14325 | /* Similarly, there is no .got.plt section. */ |
| 14326 | #undef elf_backend_want_got_plt |
| 14327 | #define elf_backend_want_got_plt 0 |
| 14328 | |
| 14329 | #undef elf_backend_plt_sym_val |
| 14330 | #define elf_backend_plt_sym_val elf32_arm_symbian_plt_sym_val |
| 14331 | |
| 14332 | #undef elf_backend_may_use_rel_p |
| 14333 | #define elf_backend_may_use_rel_p 1 |
| 14334 | #undef elf_backend_may_use_rela_p |
| 14335 | #define elf_backend_may_use_rela_p 0 |
| 14336 | #undef elf_backend_default_use_rela_p |
| 14337 | #define elf_backend_default_use_rela_p 0 |
| 14338 | #undef elf_backend_want_plt_sym |
| 14339 | #define elf_backend_want_plt_sym 0 |
| 14340 | #undef ELF_MAXPAGESIZE |
| 14341 | #define ELF_MAXPAGESIZE 0x8000 |
| 14342 | |
| 14343 | #include "elf32-target.h" |