| 1 | /* Meta support for 32-bit ELF |
| 2 | Copyright (C) 2013 Free Software Foundation, Inc. |
| 3 | Contributed by Imagination Technologies Ltd. |
| 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 "bfd.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "elf32-metag.h" |
| 27 | #include "elf/metag.h" |
| 28 | |
| 29 | #define GOT_ENTRY_SIZE 4 |
| 30 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld-uClibc.so.0" |
| 31 | |
| 32 | /* ABI version: |
| 33 | 0 - original |
| 34 | 1 - with GOT offset */ |
| 35 | #define METAG_ELF_ABI_VERSION 1 |
| 36 | |
| 37 | static const unsigned int plt0_entry[] = |
| 38 | { |
| 39 | 0x02000005, /* MOVT D0Re0, #HI(GOT+4) */ |
| 40 | 0x02000000, /* ADD D0Re0, D0Re0, #LO(GOT+4) */ |
| 41 | 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */ |
| 42 | 0xc600012a, /* GETD PC, [D0Re0+#4] */ |
| 43 | 0xa0fffffe /* NOP */ |
| 44 | }; |
| 45 | |
| 46 | static const unsigned int plt0_pic_entry[] = |
| 47 | { |
| 48 | 0x82900001, /* ADDT A0.2, CPC0, #0 */ |
| 49 | 0x82100000, /* ADD A0.2, A0.2, #0 */ |
| 50 | 0xa3100c20, /* MOV D0Re0, A0.2 */ |
| 51 | 0xb70001e3, /* SETL [A0StP++], D0Re0, D1Re0 */ |
| 52 | 0xc600012a, /* GETD PC, [D0Re0+#4] */ |
| 53 | }; |
| 54 | |
| 55 | static const unsigned int plt_entry[] = |
| 56 | { |
| 57 | 0x82100005, /* MOVT A0.2, #HI(GOT+off) */ |
| 58 | 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */ |
| 59 | 0xc600806a, /* GETD PC, [A0.2] */ |
| 60 | 0x03000004, /* MOV D1Re0, #LO(offset) */ |
| 61 | 0xa0000000 /* B PLT0 */ |
| 62 | }; |
| 63 | |
| 64 | static const unsigned int plt_pic_entry[] = |
| 65 | { |
| 66 | 0x82900001, /* ADDT A0.2, CPC0, #HI(GOT+off) */ |
| 67 | 0x82100000, /* ADD A0.2, A0.2, #LO(GOT+off) */ |
| 68 | 0xc600806a, /* GETD PC, [A0.2] */ |
| 69 | 0x03000004, /* MOV D1Re0, #LO(offset) */ |
| 70 | 0xa0000000 /* B PLT0 */ |
| 71 | }; |
| 72 | |
| 73 | /* Variable names follow a coding style. |
| 74 | Please follow this (Apps Hungarian) style: |
| 75 | |
| 76 | Structure/Variable Prefix |
| 77 | elf_link_hash_table "etab" |
| 78 | elf_link_hash_entry "eh" |
| 79 | |
| 80 | elf_metag_link_hash_table "htab" |
| 81 | elf_metag_link_hash_entry "hh" |
| 82 | |
| 83 | bfd_link_hash_table "btab" |
| 84 | bfd_link_hash_entry "bh" |
| 85 | |
| 86 | bfd_hash_table containing stubs "bstab" |
| 87 | elf_metag_stub_hash_entry "hsh" |
| 88 | |
| 89 | elf_metag_dyn_reloc_entry "hdh" |
| 90 | |
| 91 | Always remember to use GNU Coding Style. */ |
| 92 | |
| 93 | #define PLT_ENTRY_SIZE sizeof(plt_entry) |
| 94 | |
| 95 | static reloc_howto_type elf_metag_howto_table[] = |
| 96 | { |
| 97 | /* High order 16 bit absolute. */ |
| 98 | HOWTO (R_METAG_HIADDR16, /* type */ |
| 99 | 16, /* rightshift */ |
| 100 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 101 | 16, /* bitsize */ |
| 102 | FALSE, /* pc_relative */ |
| 103 | 3, /* bitpos */ |
| 104 | complain_overflow_dont, /* complain_on_overflow */ |
| 105 | bfd_elf_generic_reloc, /* special_function */ |
| 106 | "R_METAG_HIADDR16", /* name */ |
| 107 | FALSE, /* partial_inplace */ |
| 108 | 0, /* src_mask */ |
| 109 | 0x0007fff8, /* dst_mask */ |
| 110 | FALSE), /* pcrel_offset */ |
| 111 | |
| 112 | /* Low order 16 bit absolute. */ |
| 113 | HOWTO (R_METAG_LOADDR16, /* type */ |
| 114 | 0, /* rightshift */ |
| 115 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 116 | 16, /* bitsize */ |
| 117 | FALSE, /* pc_relative */ |
| 118 | 3, /* bitpos */ |
| 119 | complain_overflow_dont,/* complain_on_overflow */ |
| 120 | bfd_elf_generic_reloc, /* special_function */ |
| 121 | "R_METAG_LOADDR16", /* name */ |
| 122 | FALSE, /* partial_inplace */ |
| 123 | 0, /* src_mask */ |
| 124 | 0x0007fff8, /* dst_mask */ |
| 125 | FALSE), /* pcrel_offset */ |
| 126 | |
| 127 | /* 32 bit absolute. */ |
| 128 | HOWTO (R_METAG_ADDR32, /* type */ |
| 129 | 0, /* rightshift */ |
| 130 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 131 | 32, /* bitsize */ |
| 132 | FALSE, /* pc_relative */ |
| 133 | 0, /* bitpos */ |
| 134 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 135 | bfd_elf_generic_reloc, /* special_function */ |
| 136 | "R_METAG_ADDR32", /* name */ |
| 137 | FALSE, /* partial_inplace */ |
| 138 | 0x00000000, /* src_mask */ |
| 139 | 0xffffffff, /* dst_mask */ |
| 140 | FALSE), /* pcrel_offset */ |
| 141 | |
| 142 | /* No relocation. */ |
| 143 | HOWTO (R_METAG_NONE, /* type */ |
| 144 | 0, /* rightshift */ |
| 145 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 146 | 0, /* bitsize */ |
| 147 | FALSE, /* pc_relative */ |
| 148 | 0, /* bitpos */ |
| 149 | complain_overflow_dont, /* complain_on_overflow */ |
| 150 | bfd_elf_generic_reloc, /* special_function */ |
| 151 | "R_METAG_NONE", /* name */ |
| 152 | FALSE, /* partial_inplace */ |
| 153 | 0, /* src_mask */ |
| 154 | 0, /* dst_mask */ |
| 155 | FALSE), /* pcrel_offset */ |
| 156 | |
| 157 | /* 19 bit pc relative */ |
| 158 | HOWTO (R_METAG_RELBRANCH, /* type */ |
| 159 | 2, /* rightshift */ |
| 160 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 161 | 19, /* bitsize */ |
| 162 | TRUE, /* pc_relative */ |
| 163 | 5, /* bitpos */ |
| 164 | complain_overflow_signed, /* complain_on_overflow */ |
| 165 | bfd_elf_generic_reloc, /* special_function */ |
| 166 | "R_METAG_RELBRANCH", /* name */ |
| 167 | FALSE, /* partial_inplace */ |
| 168 | 0, /* src_mask */ |
| 169 | 0x00ffffe0, /* dst_mask */ |
| 170 | FALSE), /* pcrel_offset */ |
| 171 | |
| 172 | /* GET/SET offset */ |
| 173 | HOWTO (R_METAG_GETSETOFF, /* type */ |
| 174 | 0, /* rightshift */ |
| 175 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 176 | 12, /* bitsize */ |
| 177 | FALSE, /* pc_relative */ |
| 178 | 7, /* bitpos */ |
| 179 | complain_overflow_dont, /* complain_on_overflow */ |
| 180 | bfd_elf_generic_reloc, /* special_function */ |
| 181 | "R_METAG_GETSETOFF", /* name */ |
| 182 | FALSE, /* partial_inplace */ |
| 183 | 0, /* src_mask */ |
| 184 | 0, /* dst_mask */ |
| 185 | FALSE), /* pcrel_offset */ |
| 186 | |
| 187 | EMPTY_HOWTO (6), |
| 188 | EMPTY_HOWTO (7), |
| 189 | EMPTY_HOWTO (8), |
| 190 | EMPTY_HOWTO (9), |
| 191 | EMPTY_HOWTO (10), |
| 192 | EMPTY_HOWTO (11), |
| 193 | EMPTY_HOWTO (12), |
| 194 | EMPTY_HOWTO (13), |
| 195 | EMPTY_HOWTO (14), |
| 196 | EMPTY_HOWTO (15), |
| 197 | EMPTY_HOWTO (16), |
| 198 | EMPTY_HOWTO (17), |
| 199 | EMPTY_HOWTO (18), |
| 200 | EMPTY_HOWTO (19), |
| 201 | EMPTY_HOWTO (20), |
| 202 | EMPTY_HOWTO (21), |
| 203 | EMPTY_HOWTO (22), |
| 204 | EMPTY_HOWTO (23), |
| 205 | EMPTY_HOWTO (24), |
| 206 | EMPTY_HOWTO (25), |
| 207 | EMPTY_HOWTO (26), |
| 208 | EMPTY_HOWTO (27), |
| 209 | EMPTY_HOWTO (28), |
| 210 | EMPTY_HOWTO (29), |
| 211 | |
| 212 | HOWTO (R_METAG_GNU_VTINHERIT, /* type */ |
| 213 | 0, /* rightshift */ |
| 214 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 215 | 0, /* bitsize */ |
| 216 | FALSE, /* pc_relative */ |
| 217 | 0, /* bitpos */ |
| 218 | complain_overflow_dont, /* complain_on_overflow */ |
| 219 | NULL, /* special_function */ |
| 220 | "R_METAG_GNU_VTINHERIT", /* name */ |
| 221 | FALSE, /* partial_inplace */ |
| 222 | 0, /* src_mask */ |
| 223 | 0, /* dst_mask */ |
| 224 | FALSE), /* pcrel_offset */ |
| 225 | |
| 226 | HOWTO (R_METAG_GNU_VTENTRY, /* type */ |
| 227 | 0, /* rightshift */ |
| 228 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 229 | 0, /* bitsize */ |
| 230 | FALSE, /* pc_relative */ |
| 231 | 0, /* bitpos */ |
| 232 | complain_overflow_dont, /* complain_on_overflow */ |
| 233 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 234 | "R_METAG_GNU_VTENTRY", /* name */ |
| 235 | FALSE, /* partial_inplace */ |
| 236 | 0, /* src_mask */ |
| 237 | 0, /* dst_mask */ |
| 238 | FALSE), /* pcrel_offset */ |
| 239 | |
| 240 | /* High order 16 bit GOT offset */ |
| 241 | HOWTO (R_METAG_HI16_GOTOFF, /* type */ |
| 242 | 16, /* rightshift */ |
| 243 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 244 | 16, /* bitsize */ |
| 245 | FALSE, /* pc_relative */ |
| 246 | 3, /* bitpos */ |
| 247 | complain_overflow_dont, /* complain_on_overflow */ |
| 248 | bfd_elf_generic_reloc, /* special_function */ |
| 249 | "R_METAG_HI16_GOTOFF", /* name */ |
| 250 | FALSE, /* partial_inplace */ |
| 251 | 0, /* src_mask */ |
| 252 | 0x0007fff8, /* dst_mask */ |
| 253 | FALSE), /* pcrel_offset */ |
| 254 | |
| 255 | /* Low order 16 bit GOT offset */ |
| 256 | HOWTO (R_METAG_LO16_GOTOFF, /* type */ |
| 257 | 0, /* rightshift */ |
| 258 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 259 | 16, /* bitsize */ |
| 260 | FALSE, /* pc_relative */ |
| 261 | 3, /* bitpos */ |
| 262 | complain_overflow_dont, /* complain_on_overflow */ |
| 263 | bfd_elf_generic_reloc, /* special_function */ |
| 264 | "R_METAG_LO16_GOTOFF", /* name */ |
| 265 | FALSE, /* partial_inplace */ |
| 266 | 0, /* src_mask */ |
| 267 | 0x0007fff8, /* dst_mask */ |
| 268 | FALSE), /* pcrel_offset */ |
| 269 | |
| 270 | /* GET/SET GOT offset */ |
| 271 | HOWTO (R_METAG_GETSET_GOTOFF, /* type */ |
| 272 | 0, /* rightshift */ |
| 273 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 274 | 12, /* bitsize */ |
| 275 | FALSE, /* pc_relative */ |
| 276 | 7, /* bitpos */ |
| 277 | complain_overflow_dont, /* complain_on_overflow */ |
| 278 | bfd_elf_generic_reloc, /* special_function */ |
| 279 | "R_METAG_GETSET_GOTOFF", /* name */ |
| 280 | FALSE, /* partial_inplace */ |
| 281 | 0, /* src_mask */ |
| 282 | 0, /* dst_mask */ |
| 283 | FALSE), /* pcrel_offset */ |
| 284 | |
| 285 | /* GET/SET GOT relative */ |
| 286 | HOWTO (R_METAG_GETSET_GOT, /* type */ |
| 287 | 0, /* rightshift */ |
| 288 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 289 | 12, /* bitsize */ |
| 290 | FALSE, /* pc_relative */ |
| 291 | 7, /* bitpos */ |
| 292 | complain_overflow_dont, /* complain_on_overflow */ |
| 293 | bfd_elf_generic_reloc, /* special_function */ |
| 294 | "R_METAG_GETSET_GOT", /* name */ |
| 295 | FALSE, /* partial_inplace */ |
| 296 | 0, /* src_mask */ |
| 297 | 0, /* dst_mask */ |
| 298 | FALSE), /* pcrel_offset */ |
| 299 | |
| 300 | /* High order 16 bit GOT reference */ |
| 301 | HOWTO (R_METAG_HI16_GOTPC, /* type */ |
| 302 | 16, /* rightshift */ |
| 303 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 304 | 16, /* bitsize */ |
| 305 | FALSE, /* pc_relative */ |
| 306 | 3, /* bitpos */ |
| 307 | complain_overflow_dont, /* complain_on_overflow */ |
| 308 | bfd_elf_generic_reloc, /* special_function */ |
| 309 | "R_METAG_HI16_GOTPC", /* name */ |
| 310 | FALSE, /* partial_inplace */ |
| 311 | 0, /* src_mask */ |
| 312 | 0x0007fff8, /* dst_mask */ |
| 313 | FALSE), /* pcrel_offset */ |
| 314 | |
| 315 | /* Low order 16 bit GOT reference */ |
| 316 | HOWTO (R_METAG_LO16_GOTPC, /* type */ |
| 317 | 0, /* rightshift */ |
| 318 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 319 | 16, /* bitsize */ |
| 320 | FALSE, /* pc_relative */ |
| 321 | 3, /* bitpos */ |
| 322 | complain_overflow_dont, /* complain_on_overflow */ |
| 323 | bfd_elf_generic_reloc, /* special_function */ |
| 324 | "R_METAG_LO16_GOTPC", /* name */ |
| 325 | FALSE, /* partial_inplace */ |
| 326 | 0, /* src_mask */ |
| 327 | 0x0007fff8, /* dst_mask */ |
| 328 | FALSE), /* pcrel_offset */ |
| 329 | |
| 330 | /* High order 16 bit PLT */ |
| 331 | HOWTO (R_METAG_HI16_PLT, /* type */ |
| 332 | 16, /* rightshift */ |
| 333 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 334 | 16, /* bitsize */ |
| 335 | FALSE, /* pc_relative */ |
| 336 | 3, /* bitpos */ |
| 337 | complain_overflow_dont, /* complain_on_overflow */ |
| 338 | bfd_elf_generic_reloc, /* special_function */ |
| 339 | "R_METAG_HI16_PLT", /* name */ |
| 340 | FALSE, /* partial_inplace */ |
| 341 | 0, /* src_mask */ |
| 342 | 0x0007fff8, /* dst_mask */ |
| 343 | FALSE), /* pcrel_offset */ |
| 344 | |
| 345 | /* Low order 16 bit PLT */ |
| 346 | HOWTO (R_METAG_LO16_PLT, /* type */ |
| 347 | 0, /* rightshift */ |
| 348 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 349 | 16, /* bitsize */ |
| 350 | FALSE, /* pc_relative */ |
| 351 | 3, /* bitpos */ |
| 352 | complain_overflow_dont, /* complain_on_overflow */ |
| 353 | bfd_elf_generic_reloc, /* special_function */ |
| 354 | "R_METAG_LO16_PLT", /* name */ |
| 355 | FALSE, /* partial_inplace */ |
| 356 | 0, /* src_mask */ |
| 357 | 0xffffffff, /* dst_mask */ |
| 358 | FALSE), /* pcrel_offset */ |
| 359 | |
| 360 | HOWTO (R_METAG_RELBRANCH_PLT, /* type */ |
| 361 | 2, /* rightshift */ |
| 362 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 363 | 19, /* bitsize */ |
| 364 | TRUE, /* pc_relative */ |
| 365 | 5, /* bitpos */ |
| 366 | complain_overflow_signed, /* complain_on_overflow */ |
| 367 | bfd_elf_generic_reloc, /* special_function */ |
| 368 | "R_METAG_RELBRANCH_PLT", /* name */ |
| 369 | FALSE, /* partial_inplace */ |
| 370 | 0, /* src_mask */ |
| 371 | 0x00ffffe0, /* dst_mask */ |
| 372 | FALSE), /* pcrel_offset */ |
| 373 | |
| 374 | /* Dummy relocs used by the linker internally. */ |
| 375 | HOWTO (R_METAG_GOTOFF, /* type */ |
| 376 | 0, /* rightshift */ |
| 377 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 378 | 32, /* bitsize */ |
| 379 | FALSE, /* pc_relative */ |
| 380 | 0, /* bitpos */ |
| 381 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 382 | bfd_elf_generic_reloc, /* special_function */ |
| 383 | "R_METAG_GOTOFF", /* name */ |
| 384 | FALSE, /* partial_inplace */ |
| 385 | 0xffffffff, /* src_mask */ |
| 386 | 0xffffffff, /* dst_mask */ |
| 387 | FALSE), /* pcrel_offset */ |
| 388 | |
| 389 | HOWTO (R_METAG_PLT, /* type */ |
| 390 | 0, /* rightshift */ |
| 391 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 392 | 32, /* bitsize */ |
| 393 | FALSE, /* pc_relative */ |
| 394 | 0, /* bitpos */ |
| 395 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 396 | bfd_elf_generic_reloc, /* special_function */ |
| 397 | "R_METAG_GOTOFF", /* name */ |
| 398 | FALSE, /* partial_inplace */ |
| 399 | 0xffffffff, /* src_mask */ |
| 400 | 0xffffffff, /* dst_mask */ |
| 401 | FALSE), /* pcrel_offset */ |
| 402 | |
| 403 | /* This is used only by the dynamic linker. The symbol should exist |
| 404 | both in the object being run and in some shared library. The |
| 405 | dynamic linker copies the data addressed by the symbol from the |
| 406 | shared library into the object, because the object being |
| 407 | run has to have the data at some particular address. */ |
| 408 | HOWTO (R_METAG_COPY, /* type */ |
| 409 | 0, /* rightshift */ |
| 410 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 411 | 32, /* bitsize */ |
| 412 | FALSE, /* pc_relative */ |
| 413 | 0, /* bitpos */ |
| 414 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 415 | bfd_elf_generic_reloc, /* special_function */ |
| 416 | "R_METAG_COPY", /* name */ |
| 417 | FALSE, /* partial_inplace */ |
| 418 | 0xffffffff, /* src_mask */ |
| 419 | 0xffffffff, /* dst_mask */ |
| 420 | FALSE), /* pcrel_offset */ |
| 421 | |
| 422 | /* Marks a procedure linkage table entry for a symbol. */ |
| 423 | HOWTO (R_METAG_JMP_SLOT, /* type */ |
| 424 | 0, /* rightshift */ |
| 425 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 426 | 32, /* bitsize */ |
| 427 | FALSE, /* pc_relative */ |
| 428 | 0, /* bitpos */ |
| 429 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 430 | bfd_elf_generic_reloc, /* special_function */ |
| 431 | "R_METAG_JMP_SLOT", /* name */ |
| 432 | FALSE, /* partial_inplace */ |
| 433 | 0xffffffff, /* src_mask */ |
| 434 | 0xffffffff, /* dst_mask */ |
| 435 | FALSE), /* pcrel_offset */ |
| 436 | |
| 437 | /* Used only by the dynamic linker. When the object is run, this |
| 438 | longword is set to the load address of the object, plus the |
| 439 | addend. */ |
| 440 | HOWTO (R_METAG_RELATIVE, /* type */ |
| 441 | 0, /* rightshift */ |
| 442 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 443 | 32, /* bitsize */ |
| 444 | FALSE, /* pc_relative */ |
| 445 | 0, /* bitpos */ |
| 446 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 447 | bfd_elf_generic_reloc, /* special_function */ |
| 448 | "R_METAG_RELATIVE", /* name */ |
| 449 | FALSE, /* partial_inplace */ |
| 450 | 0xffffffff, /* src_mask */ |
| 451 | 0xffffffff, /* dst_mask */ |
| 452 | FALSE), /* pcrel_offset */ |
| 453 | |
| 454 | HOWTO (R_METAG_GLOB_DAT, /* type */ |
| 455 | 0, /* rightshift */ |
| 456 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 457 | 32, /* bitsize */ |
| 458 | FALSE, /* pc_relative */ |
| 459 | 0, /* bitpos */ |
| 460 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 461 | bfd_elf_generic_reloc, /* special_function */ |
| 462 | "R_METAG_GLOB_DAT", /* name */ |
| 463 | FALSE, /* partial_inplace */ |
| 464 | 0xffffffff, /* src_mask */ |
| 465 | 0xffffffff, /* dst_mask */ |
| 466 | FALSE), /* pcrel_offset */ |
| 467 | |
| 468 | HOWTO (R_METAG_TLS_GD, /* type */ |
| 469 | 0, /* rightshift */ |
| 470 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 471 | 16, /* bitsize */ |
| 472 | FALSE, /* pc_relative */ |
| 473 | 3, /* bitpos */ |
| 474 | complain_overflow_dont, /* complain_on_overflow */ |
| 475 | bfd_elf_generic_reloc, /* special_function */ |
| 476 | "R_METAG_TLS_GD", /* name */ |
| 477 | FALSE, /* partial_inplace */ |
| 478 | 0, /* src_mask */ |
| 479 | 0x0007fff8, /* dst_mask */ |
| 480 | FALSE), /* pcrel_offset */ |
| 481 | |
| 482 | HOWTO (R_METAG_TLS_LDM, /* type */ |
| 483 | 0, /* rightshift */ |
| 484 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 485 | 16, /* bitsize */ |
| 486 | FALSE, /* pc_relative */ |
| 487 | 3, /* bitpos */ |
| 488 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 489 | bfd_elf_generic_reloc, /* special_function */ |
| 490 | "R_METAG_TLS_LDM", /* name */ |
| 491 | FALSE, /* partial_inplace */ |
| 492 | 0, /* src_mask */ |
| 493 | 0x0007fff8, /* dst_mask */ |
| 494 | FALSE), /* pcrel_offset */ |
| 495 | |
| 496 | HOWTO (R_METAG_TLS_LDO_HI16, /* type */ |
| 497 | 16, /* rightshift */ |
| 498 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 499 | 16, /* bitsize */ |
| 500 | FALSE, /* pc_relative */ |
| 501 | 3, /* bitpos */ |
| 502 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 503 | bfd_elf_generic_reloc, /* special_function */ |
| 504 | "R_METAG_TLS_LDO_HI16", /* name */ |
| 505 | FALSE, /* partial_inplace */ |
| 506 | 0, /* src_mask */ |
| 507 | 0x0007fff8, /* dst_mask */ |
| 508 | FALSE), /* pcrel_offset */ |
| 509 | |
| 510 | HOWTO (R_METAG_TLS_LDO_LO16, /* type */ |
| 511 | 0, /* rightshift */ |
| 512 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 513 | 16, /* bitsize */ |
| 514 | FALSE, /* pc_relative */ |
| 515 | 3, /* bitpos */ |
| 516 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 517 | bfd_elf_generic_reloc, /* special_function */ |
| 518 | "R_METAG_TLS_LDO_LO16", /* name */ |
| 519 | FALSE, /* partial_inplace */ |
| 520 | 0, /* src_mask */ |
| 521 | 0x0007fff8, /* dst_mask */ |
| 522 | FALSE), /* pcrel_offset */ |
| 523 | |
| 524 | /* Dummy reloc used by the linker internally. */ |
| 525 | HOWTO (R_METAG_TLS_LDO, /* type */ |
| 526 | 0, /* rightshift */ |
| 527 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 528 | 16, /* bitsize */ |
| 529 | FALSE, /* pc_relative */ |
| 530 | 3, /* bitpos */ |
| 531 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 532 | bfd_elf_generic_reloc, /* special_function */ |
| 533 | "R_METAG_TLS_LDO", /* name */ |
| 534 | FALSE, /* partial_inplace */ |
| 535 | 0, /* src_mask */ |
| 536 | 0x0007fff8, /* dst_mask */ |
| 537 | FALSE), /* pcrel_offset */ |
| 538 | |
| 539 | HOWTO (R_METAG_TLS_IE, /* type */ |
| 540 | 2, /* rightshift */ |
| 541 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 542 | 12, /* bitsize */ |
| 543 | FALSE, /* pc_relative */ |
| 544 | 7, /* bitpos */ |
| 545 | complain_overflow_dont, /* complain_on_overflow */ |
| 546 | bfd_elf_generic_reloc, /* special_function */ |
| 547 | "R_METAG_TLS_IE", /* name */ |
| 548 | FALSE, /* partial_inplace */ |
| 549 | 0, /* src_mask */ |
| 550 | 0x0007ff80, /* dst_mask */ |
| 551 | FALSE), /* pcrel_offset */ |
| 552 | |
| 553 | /* Dummy reloc used by the linker internally. */ |
| 554 | HOWTO (R_METAG_TLS_IENONPIC, /* type */ |
| 555 | 0, /* rightshift */ |
| 556 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 557 | 16, /* bitsize */ |
| 558 | FALSE, /* pc_relative */ |
| 559 | 3, /* bitpos */ |
| 560 | complain_overflow_dont, /* complain_on_overflow */ |
| 561 | bfd_elf_generic_reloc, /* special_function */ |
| 562 | "R_METAG_TLS_IENONPIC", /* name */ |
| 563 | FALSE, /* partial_inplace */ |
| 564 | 0, /* src_mask */ |
| 565 | 0x0007fff8, /* dst_mask */ |
| 566 | FALSE), /* pcrel_offset */ |
| 567 | |
| 568 | HOWTO (R_METAG_TLS_IENONPIC_HI16,/* type */ |
| 569 | 16, /* rightshift */ |
| 570 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 571 | 16, /* bitsize */ |
| 572 | FALSE, /* pc_relative */ |
| 573 | 3, /* bitpos */ |
| 574 | complain_overflow_dont, /* complain_on_overflow */ |
| 575 | bfd_elf_generic_reloc, /* special_function */ |
| 576 | "R_METAG_TLS_IENONPIC_HI16", /* name */ |
| 577 | FALSE, /* partial_inplace */ |
| 578 | 0, /* src_mask */ |
| 579 | 0x0007fff8, /* dst_mask */ |
| 580 | FALSE), /* pcrel_offset */ |
| 581 | |
| 582 | HOWTO (R_METAG_TLS_IENONPIC_LO16,/* type */ |
| 583 | 0, /* rightshift */ |
| 584 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 585 | 16, /* bitsize */ |
| 586 | FALSE, /* pc_relative */ |
| 587 | 3, /* bitpos */ |
| 588 | complain_overflow_dont, /* complain_on_overflow */ |
| 589 | bfd_elf_generic_reloc, /* special_function */ |
| 590 | "R_METAG_TLS_IENONPIC_LO16", /* name */ |
| 591 | FALSE, /* partial_inplace */ |
| 592 | 0, /* src_mask */ |
| 593 | 0x0007fff8, /* dst_mask */ |
| 594 | FALSE), /* pcrel_offset */ |
| 595 | |
| 596 | HOWTO (R_METAG_TLS_TPOFF, /* type */ |
| 597 | 0, /* rightshift */ |
| 598 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 599 | 32, /* bitsize */ |
| 600 | FALSE, /* pc_relative */ |
| 601 | 0, /* bitpos */ |
| 602 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 603 | bfd_elf_generic_reloc, /* special_function */ |
| 604 | "R_METAG_TLS_TPOFF", /* name */ |
| 605 | FALSE, /* partial_inplace */ |
| 606 | 0, /* src_mask */ |
| 607 | 0xffffffff, /* dst_mask */ |
| 608 | FALSE), /* pcrel_offset */ |
| 609 | |
| 610 | HOWTO (R_METAG_TLS_DTPMOD, /* type */ |
| 611 | 0, /* rightshift */ |
| 612 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 613 | 32, /* bitsize */ |
| 614 | FALSE, /* pc_relative */ |
| 615 | 0, /* bitpos */ |
| 616 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 617 | bfd_elf_generic_reloc, /* special_function */ |
| 618 | "R_METAG_TLS_DTPMOD", /* name */ |
| 619 | FALSE, /* partial_inplace */ |
| 620 | 0, /* src_mask */ |
| 621 | 0xffffffff, /* dst_mask */ |
| 622 | FALSE), /* pcrel_offset */ |
| 623 | |
| 624 | HOWTO (R_METAG_TLS_DTPOFF, /* type */ |
| 625 | 0, /* rightshift */ |
| 626 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 627 | 32, /* bitsize */ |
| 628 | FALSE, /* pc_relative */ |
| 629 | 0, /* bitpos */ |
| 630 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 631 | bfd_elf_generic_reloc, /* special_function */ |
| 632 | "R_METAG_TLS_DTPOFF", /* name */ |
| 633 | FALSE, /* partial_inplace */ |
| 634 | 0, /* src_mask */ |
| 635 | 0xffffffff, /* dst_mask */ |
| 636 | FALSE), /* pcrel_offset */ |
| 637 | |
| 638 | /* Dummy reloc used by the linker internally. */ |
| 639 | HOWTO (R_METAG_TLS_LE, /* type */ |
| 640 | 0, /* rightshift */ |
| 641 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 642 | 32, /* bitsize */ |
| 643 | FALSE, /* pc_relative */ |
| 644 | 0, /* bitpos */ |
| 645 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 646 | bfd_elf_generic_reloc, /* special_function */ |
| 647 | "R_METAG_TLS_LE", /* name */ |
| 648 | FALSE, /* partial_inplace */ |
| 649 | 0, /* src_mask */ |
| 650 | 0xffffffff, /* dst_mask */ |
| 651 | FALSE), /* pcrel_offset */ |
| 652 | |
| 653 | HOWTO (R_METAG_TLS_LE_HI16, /* type */ |
| 654 | 16, /* rightshift */ |
| 655 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 656 | 16, /* bitsize */ |
| 657 | FALSE, /* pc_relative */ |
| 658 | 3, /* bitpos */ |
| 659 | complain_overflow_dont, /* complain_on_overflow */ |
| 660 | bfd_elf_generic_reloc, /* special_function */ |
| 661 | "R_METAG_TLS_LE_HI16", /* name */ |
| 662 | FALSE, /* partial_inplace */ |
| 663 | 0, /* src_mask */ |
| 664 | 0x0007fff8, /* dst_mask */ |
| 665 | FALSE), /* pcrel_offset */ |
| 666 | |
| 667 | HOWTO (R_METAG_TLS_LE_LO16, /* type */ |
| 668 | 0, /* rightshift */ |
| 669 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 670 | 16, /* bitsize */ |
| 671 | FALSE, /* pc_relative */ |
| 672 | 3, /* bitpos */ |
| 673 | complain_overflow_dont, /* complain_on_overflow */ |
| 674 | bfd_elf_generic_reloc, /* special_function */ |
| 675 | "R_METAG_TLS_LE_LO16", /* name */ |
| 676 | FALSE, /* partial_inplace */ |
| 677 | 0, /* src_mask */ |
| 678 | 0x0007fff8, /* dst_mask */ |
| 679 | FALSE), /* pcrel_offset */ |
| 680 | |
| 681 | }; |
| 682 | |
| 683 | #define BRANCH_BITS 19 |
| 684 | |
| 685 | /* The GOT is typically accessed using a [GS]ETD instruction. The size of the |
| 686 | immediate offset which can be used in such instructions therefore limits |
| 687 | the usable size of the GOT. If the base register for the [GS]ETD (A1LbP) |
| 688 | is pointing to the base of the GOT then the size is limited to the maximum |
| 689 | 11 bits unsigned dword offset, or 2^13 = 0x2000 bytes. However the offset |
| 690 | in a [GS]ETD instruction is signed, so by setting the base address register |
| 691 | to an offset of that 0x2000 byte maximum unsigned offset from the base of |
| 692 | the GOT we can use negative offsets in addition to positive. This |
| 693 | effectively doubles the usable GOT size to 0x4000 bytes. */ |
| 694 | #define GOT_REG_OFFSET 0x2000 |
| 695 | |
| 696 | struct metag_reloc_map |
| 697 | { |
| 698 | bfd_reloc_code_real_type bfd_reloc_val; |
| 699 | unsigned int metag_reloc_val; |
| 700 | }; |
| 701 | |
| 702 | static const struct metag_reloc_map metag_reloc_map [] = |
| 703 | { |
| 704 | { BFD_RELOC_NONE, R_METAG_NONE }, |
| 705 | { BFD_RELOC_32, R_METAG_ADDR32 }, |
| 706 | { BFD_RELOC_METAG_HIADDR16, R_METAG_HIADDR16 }, |
| 707 | { BFD_RELOC_METAG_LOADDR16, R_METAG_LOADDR16 }, |
| 708 | { BFD_RELOC_METAG_RELBRANCH, R_METAG_RELBRANCH }, |
| 709 | { BFD_RELOC_METAG_GETSETOFF, R_METAG_GETSETOFF }, |
| 710 | { BFD_RELOC_VTABLE_INHERIT, R_METAG_GNU_VTINHERIT }, |
| 711 | { BFD_RELOC_VTABLE_ENTRY, R_METAG_GNU_VTENTRY }, |
| 712 | { BFD_RELOC_METAG_REL8, R_METAG_REL8 }, |
| 713 | { BFD_RELOC_METAG_REL16, R_METAG_REL16 }, |
| 714 | { BFD_RELOC_METAG_HI16_GOTOFF, R_METAG_HI16_GOTOFF }, |
| 715 | { BFD_RELOC_METAG_LO16_GOTOFF, R_METAG_LO16_GOTOFF }, |
| 716 | { BFD_RELOC_METAG_GETSET_GOTOFF, R_METAG_GETSET_GOTOFF }, |
| 717 | { BFD_RELOC_METAG_GETSET_GOT, R_METAG_GETSET_GOT }, |
| 718 | { BFD_RELOC_METAG_HI16_GOTPC, R_METAG_HI16_GOTPC }, |
| 719 | { BFD_RELOC_METAG_LO16_GOTPC, R_METAG_LO16_GOTPC }, |
| 720 | { BFD_RELOC_METAG_HI16_PLT, R_METAG_HI16_PLT }, |
| 721 | { BFD_RELOC_METAG_LO16_PLT, R_METAG_LO16_PLT }, |
| 722 | { BFD_RELOC_METAG_RELBRANCH_PLT, R_METAG_RELBRANCH_PLT }, |
| 723 | { BFD_RELOC_METAG_GOTOFF, R_METAG_GOTOFF }, |
| 724 | { BFD_RELOC_METAG_PLT, R_METAG_PLT }, |
| 725 | { BFD_RELOC_METAG_COPY, R_METAG_COPY }, |
| 726 | { BFD_RELOC_METAG_JMP_SLOT, R_METAG_JMP_SLOT }, |
| 727 | { BFD_RELOC_METAG_RELATIVE, R_METAG_RELATIVE }, |
| 728 | { BFD_RELOC_METAG_GLOB_DAT, R_METAG_GLOB_DAT }, |
| 729 | { BFD_RELOC_METAG_TLS_GD, R_METAG_TLS_GD }, |
| 730 | { BFD_RELOC_METAG_TLS_LDM, R_METAG_TLS_LDM }, |
| 731 | { BFD_RELOC_METAG_TLS_LDO_HI16, R_METAG_TLS_LDO_HI16 }, |
| 732 | { BFD_RELOC_METAG_TLS_LDO_LO16, R_METAG_TLS_LDO_LO16 }, |
| 733 | { BFD_RELOC_METAG_TLS_LDO, R_METAG_TLS_LDO }, |
| 734 | { BFD_RELOC_METAG_TLS_IE, R_METAG_TLS_IE }, |
| 735 | { BFD_RELOC_METAG_TLS_IENONPIC, R_METAG_TLS_IENONPIC }, |
| 736 | { BFD_RELOC_METAG_TLS_IENONPIC_HI16, R_METAG_TLS_IENONPIC_HI16 }, |
| 737 | { BFD_RELOC_METAG_TLS_IENONPIC_LO16, R_METAG_TLS_IENONPIC_LO16 }, |
| 738 | { BFD_RELOC_METAG_TLS_TPOFF, R_METAG_TLS_TPOFF }, |
| 739 | { BFD_RELOC_METAG_TLS_DTPMOD, R_METAG_TLS_DTPMOD }, |
| 740 | { BFD_RELOC_METAG_TLS_DTPOFF, R_METAG_TLS_DTPOFF }, |
| 741 | { BFD_RELOC_METAG_TLS_LE, R_METAG_TLS_LE }, |
| 742 | { BFD_RELOC_METAG_TLS_LE_HI16, R_METAG_TLS_LE_HI16 }, |
| 743 | { BFD_RELOC_METAG_TLS_LE_LO16, R_METAG_TLS_LE_LO16 }, |
| 744 | }; |
| 745 | |
| 746 | enum elf_metag_stub_type |
| 747 | { |
| 748 | metag_stub_long_branch, |
| 749 | metag_stub_long_branch_shared, |
| 750 | metag_stub_none |
| 751 | }; |
| 752 | |
| 753 | struct elf_metag_stub_hash_entry |
| 754 | { |
| 755 | /* Base hash table entry structure. */ |
| 756 | struct bfd_hash_entry bh_root; |
| 757 | |
| 758 | /* The stub section. */ |
| 759 | asection *stub_sec; |
| 760 | |
| 761 | /* Offset within stub_sec of the beginning of this stub. */ |
| 762 | bfd_vma stub_offset; |
| 763 | |
| 764 | /* Given the symbol's value and its section we can determine its final |
| 765 | value when building the stubs (so the stub knows where to jump. */ |
| 766 | bfd_vma target_value; |
| 767 | asection *target_section; |
| 768 | |
| 769 | enum elf_metag_stub_type stub_type; |
| 770 | |
| 771 | /* The symbol table entry, if any, that this was derived from. */ |
| 772 | struct elf_metag_link_hash_entry *hh; |
| 773 | |
| 774 | /* And the reloc addend that this was derived from. */ |
| 775 | bfd_vma addend; |
| 776 | |
| 777 | /* Where this stub is being called from, or, in the case of combined |
| 778 | stub sections, the first input section in the group. */ |
| 779 | asection *id_sec; |
| 780 | }; |
| 781 | |
| 782 | struct elf_metag_link_hash_entry |
| 783 | { |
| 784 | struct elf_link_hash_entry eh; |
| 785 | |
| 786 | /* A pointer to the most recently used stub hash entry against this |
| 787 | symbol. */ |
| 788 | struct elf_metag_stub_hash_entry *hsh_cache; |
| 789 | |
| 790 | /* Used to count relocations for delayed sizing of relocation |
| 791 | sections. */ |
| 792 | struct elf_metag_dyn_reloc_entry { |
| 793 | |
| 794 | /* Next relocation in the chain. */ |
| 795 | struct elf_metag_dyn_reloc_entry *hdh_next; |
| 796 | |
| 797 | /* The input section of the reloc. */ |
| 798 | asection *sec; |
| 799 | |
| 800 | /* Number of relocs copied in this section. */ |
| 801 | bfd_size_type count; |
| 802 | |
| 803 | /* Number of relative relocs copied for the input section. */ |
| 804 | bfd_size_type relative_count; |
| 805 | } *dyn_relocs; |
| 806 | |
| 807 | enum |
| 808 | { |
| 809 | GOT_UNKNOWN = 0, GOT_NORMAL = 1, GOT_TLS_IE = 2, GOT_TLS_LDM = 4, GOT_TLS_GD = 8 |
| 810 | } tls_type; |
| 811 | }; |
| 812 | |
| 813 | struct elf_metag_link_hash_table |
| 814 | { |
| 815 | /* The main hash table. */ |
| 816 | struct elf_link_hash_table etab; |
| 817 | |
| 818 | /* The stub hash table. */ |
| 819 | struct bfd_hash_table bstab; |
| 820 | |
| 821 | /* Linker stub bfd. */ |
| 822 | bfd *stub_bfd; |
| 823 | |
| 824 | /* Linker call-backs. */ |
| 825 | asection * (*add_stub_section) (const char *, asection *); |
| 826 | void (*layout_sections_again) (void); |
| 827 | |
| 828 | /* Array to keep track of which stub sections have been created, and |
| 829 | information on stub grouping. */ |
| 830 | struct map_stub |
| 831 | { |
| 832 | /* This is the section to which stubs in the group will be |
| 833 | attached. */ |
| 834 | asection *link_sec; |
| 835 | /* The stub section. */ |
| 836 | asection *stub_sec; |
| 837 | } *stub_group; |
| 838 | |
| 839 | /* Assorted information used by elf_metag_size_stubs. */ |
| 840 | unsigned int bfd_count; |
| 841 | int top_index; |
| 842 | asection **input_list; |
| 843 | Elf_Internal_Sym **all_local_syms; |
| 844 | |
| 845 | /* Short-cuts to get to dynamic linker sections. */ |
| 846 | asection *sgot; |
| 847 | asection *sgotplt; |
| 848 | asection *srelgot; |
| 849 | asection *splt; |
| 850 | asection *srelplt; |
| 851 | asection *sdynbss; |
| 852 | asection *srelbss; |
| 853 | |
| 854 | /* Small local sym cache. */ |
| 855 | struct sym_cache sym_cache; |
| 856 | |
| 857 | /* Data for LDM relocations. */ |
| 858 | union |
| 859 | { |
| 860 | bfd_signed_vma refcount; |
| 861 | bfd_vma offset; |
| 862 | } tls_ldm_got; |
| 863 | }; |
| 864 | |
| 865 | /* Return the base vma address which should be subtracted from the |
| 866 | real address when resolving a dtpoff relocation. This is PT_TLS |
| 867 | segment p_vaddr. */ |
| 868 | static bfd_vma |
| 869 | dtpoff_base (struct bfd_link_info *info) |
| 870 | { |
| 871 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 872 | if (elf_hash_table (info)->tls_sec == NULL) |
| 873 | return 0; |
| 874 | return elf_hash_table (info)->tls_sec->vma; |
| 875 | } |
| 876 | |
| 877 | /* Return the relocation value for R_METAG_TLS_IE */ |
| 878 | static bfd_vma |
| 879 | tpoff (struct bfd_link_info *info, bfd_vma address) |
| 880 | { |
| 881 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 882 | if (elf_hash_table (info)->tls_sec == NULL) |
| 883 | return 0; |
| 884 | /* METAG TLS ABI is variant I and static TLS blocks start just after |
| 885 | tcbhead structure which has 2 pointer fields. */ |
| 886 | return (address - elf_hash_table (info)->tls_sec->vma |
| 887 | + align_power ((bfd_vma) 8, |
| 888 | elf_hash_table (info)->tls_sec->alignment_power)); |
| 889 | } |
| 890 | |
| 891 | static void |
| 892 | metag_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
| 893 | arelent *cache_ptr, |
| 894 | Elf_Internal_Rela *dst) |
| 895 | { |
| 896 | unsigned int r_type; |
| 897 | |
| 898 | r_type = ELF32_R_TYPE (dst->r_info); |
| 899 | BFD_ASSERT (r_type < (unsigned int) R_METAG_MAX); |
| 900 | cache_ptr->howto = & elf_metag_howto_table [r_type]; |
| 901 | } |
| 902 | |
| 903 | static reloc_howto_type * |
| 904 | metag_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 905 | bfd_reloc_code_real_type code) |
| 906 | { |
| 907 | unsigned int i; |
| 908 | |
| 909 | for (i = 0; i < sizeof (metag_reloc_map) / sizeof (metag_reloc_map[0]); i++) |
| 910 | if (metag_reloc_map [i].bfd_reloc_val == code) |
| 911 | return & elf_metag_howto_table [metag_reloc_map[i].metag_reloc_val]; |
| 912 | |
| 913 | return NULL; |
| 914 | } |
| 915 | |
| 916 | static reloc_howto_type * |
| 917 | metag_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 918 | const char *r_name) |
| 919 | { |
| 920 | unsigned int i; |
| 921 | |
| 922 | for (i = 0; i < sizeof (elf_metag_howto_table) / sizeof (elf_metag_howto_table[0]); i++) |
| 923 | if (elf_metag_howto_table[i].name != NULL |
| 924 | && strcasecmp (elf_metag_howto_table[i].name, r_name) == 0) |
| 925 | return &elf_metag_howto_table[i]; |
| 926 | |
| 927 | return NULL; |
| 928 | } |
| 929 | |
| 930 | /* Various hash macros and functions. */ |
| 931 | #define metag_link_hash_table(p) \ |
| 932 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
| 933 | == METAG_ELF_DATA ? ((struct elf_metag_link_hash_table *) ((p)->hash)) : NULL) |
| 934 | |
| 935 | #define metag_elf_hash_entry(ent) \ |
| 936 | ((struct elf_metag_link_hash_entry *)(ent)) |
| 937 | |
| 938 | #define metag_stub_hash_entry(ent) \ |
| 939 | ((struct elf_metag_stub_hash_entry *)(ent)) |
| 940 | |
| 941 | #define metag_stub_hash_lookup(table, string, create, copy) \ |
| 942 | ((struct elf_metag_stub_hash_entry *) \ |
| 943 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 944 | |
| 945 | #define metag_elf_local_got_tls_type(abfd) \ |
| 946 | ((char *)(elf_local_got_offsets (abfd) + (elf_tdata (abfd)->symtab_hdr.sh_info))) |
| 947 | |
| 948 | /* Assorted hash table functions. */ |
| 949 | |
| 950 | /* Initialize an entry in the stub hash table. */ |
| 951 | |
| 952 | static struct bfd_hash_entry * |
| 953 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 954 | struct bfd_hash_table *table, |
| 955 | const char *string) |
| 956 | { |
| 957 | /* Allocate the structure if it has not already been allocated by a |
| 958 | subclass. */ |
| 959 | if (entry == NULL) |
| 960 | { |
| 961 | entry = bfd_hash_allocate (table, |
| 962 | sizeof (struct elf_metag_stub_hash_entry)); |
| 963 | if (entry == NULL) |
| 964 | return entry; |
| 965 | } |
| 966 | |
| 967 | /* Call the allocation method of the superclass. */ |
| 968 | entry = bfd_hash_newfunc (entry, table, string); |
| 969 | if (entry != NULL) |
| 970 | { |
| 971 | struct elf_metag_stub_hash_entry *hsh; |
| 972 | |
| 973 | /* Initialize the local fields. */ |
| 974 | hsh = (struct elf_metag_stub_hash_entry *) entry; |
| 975 | hsh->stub_sec = NULL; |
| 976 | hsh->stub_offset = 0; |
| 977 | hsh->target_value = 0; |
| 978 | hsh->target_section = NULL; |
| 979 | hsh->stub_type = metag_stub_long_branch; |
| 980 | hsh->hh = NULL; |
| 981 | hsh->id_sec = NULL; |
| 982 | } |
| 983 | |
| 984 | return entry; |
| 985 | } |
| 986 | |
| 987 | /* Initialize an entry in the link hash table. */ |
| 988 | |
| 989 | static struct bfd_hash_entry * |
| 990 | metag_link_hash_newfunc (struct bfd_hash_entry *entry, |
| 991 | struct bfd_hash_table *table, |
| 992 | const char *string) |
| 993 | { |
| 994 | /* Allocate the structure if it has not already been allocated by a |
| 995 | subclass. */ |
| 996 | if (entry == NULL) |
| 997 | { |
| 998 | entry = bfd_hash_allocate (table, |
| 999 | sizeof (struct elf_metag_link_hash_entry)); |
| 1000 | if (entry == NULL) |
| 1001 | return entry; |
| 1002 | } |
| 1003 | |
| 1004 | /* Call the allocation method of the superclass. */ |
| 1005 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| 1006 | if (entry != NULL) |
| 1007 | { |
| 1008 | struct elf_metag_link_hash_entry *hh; |
| 1009 | |
| 1010 | /* Initialize the local fields. */ |
| 1011 | hh = (struct elf_metag_link_hash_entry *) entry; |
| 1012 | hh->hsh_cache = NULL; |
| 1013 | hh->dyn_relocs = NULL; |
| 1014 | hh->tls_type = GOT_UNKNOWN; |
| 1015 | } |
| 1016 | |
| 1017 | return entry; |
| 1018 | } |
| 1019 | |
| 1020 | /* Create the derived linker hash table. The Meta ELF port uses the derived |
| 1021 | hash table to keep information specific to the Meta ELF linker (without |
| 1022 | using static variables). */ |
| 1023 | |
| 1024 | static struct bfd_link_hash_table * |
| 1025 | elf_metag_link_hash_table_create (bfd *abfd) |
| 1026 | { |
| 1027 | struct elf_metag_link_hash_table *htab; |
| 1028 | bfd_size_type amt = sizeof (*htab); |
| 1029 | |
| 1030 | htab = bfd_zmalloc (amt); |
| 1031 | if (htab == NULL) |
| 1032 | return NULL; |
| 1033 | |
| 1034 | if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd, |
| 1035 | metag_link_hash_newfunc, |
| 1036 | sizeof (struct elf_metag_link_hash_entry), |
| 1037 | METAG_ELF_DATA)) |
| 1038 | { |
| 1039 | free (htab); |
| 1040 | return NULL; |
| 1041 | } |
| 1042 | |
| 1043 | /* Init the stub hash table too. */ |
| 1044 | if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc, |
| 1045 | sizeof (struct elf_metag_stub_hash_entry))) |
| 1046 | return NULL; |
| 1047 | |
| 1048 | return &htab->etab.root; |
| 1049 | } |
| 1050 | |
| 1051 | /* Free the derived linker hash table. */ |
| 1052 | |
| 1053 | static void |
| 1054 | elf_metag_link_hash_table_free (struct bfd_link_hash_table *btab) |
| 1055 | { |
| 1056 | struct elf_metag_link_hash_table *htab |
| 1057 | = (struct elf_metag_link_hash_table *) btab; |
| 1058 | |
| 1059 | bfd_hash_table_free (&htab->bstab); |
| 1060 | _bfd_elf_link_hash_table_free (btab); |
| 1061 | } |
| 1062 | |
| 1063 | /* Section name for stubs is the associated section name plus this |
| 1064 | string. */ |
| 1065 | #define STUB_SUFFIX ".stub" |
| 1066 | |
| 1067 | /* Build a name for an entry in the stub hash table. */ |
| 1068 | |
| 1069 | static char * |
| 1070 | metag_stub_name (const asection *input_section, |
| 1071 | const asection *sym_sec, |
| 1072 | const struct elf_metag_link_hash_entry *hh, |
| 1073 | const Elf_Internal_Rela *rel) |
| 1074 | { |
| 1075 | char *stub_name; |
| 1076 | bfd_size_type len; |
| 1077 | |
| 1078 | if (hh) |
| 1079 | { |
| 1080 | len = 8 + 1 + strlen (hh->eh.root.root.string) + 1 + 8 + 1; |
| 1081 | stub_name = bfd_malloc (len); |
| 1082 | if (stub_name != NULL) |
| 1083 | { |
| 1084 | sprintf (stub_name, "%08x_%s+%x", |
| 1085 | input_section->id & 0xffffffff, |
| 1086 | hh->eh.root.root.string, |
| 1087 | (int) rel->r_addend & 0xffffffff); |
| 1088 | } |
| 1089 | } |
| 1090 | else |
| 1091 | { |
| 1092 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; |
| 1093 | stub_name = bfd_malloc (len); |
| 1094 | if (stub_name != NULL) |
| 1095 | { |
| 1096 | sprintf (stub_name, "%08x_%x:%x+%x", |
| 1097 | input_section->id & 0xffffffff, |
| 1098 | sym_sec->id & 0xffffffff, |
| 1099 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, |
| 1100 | (int) rel->r_addend & 0xffffffff); |
| 1101 | } |
| 1102 | } |
| 1103 | return stub_name; |
| 1104 | } |
| 1105 | |
| 1106 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 1107 | creating the stub name takes a bit of time. */ |
| 1108 | |
| 1109 | static struct elf_metag_stub_hash_entry * |
| 1110 | metag_get_stub_entry (const asection *input_section, |
| 1111 | const asection *sym_sec, |
| 1112 | struct elf_metag_link_hash_entry *hh, |
| 1113 | const Elf_Internal_Rela *rel, |
| 1114 | struct elf_metag_link_hash_table *htab) |
| 1115 | { |
| 1116 | struct elf_metag_stub_hash_entry *hsh; |
| 1117 | const asection *id_sec; |
| 1118 | |
| 1119 | /* If this input section is part of a group of sections sharing one |
| 1120 | stub section, then use the id of the first section in the group. |
| 1121 | Stub names need to include a section id, as there may well be |
| 1122 | more than one stub used to reach say, printf, and we need to |
| 1123 | distinguish between them. */ |
| 1124 | id_sec = htab->stub_group[input_section->id].link_sec; |
| 1125 | |
| 1126 | if (hh != NULL && hh->hsh_cache != NULL |
| 1127 | && hh->hsh_cache->hh == hh |
| 1128 | && hh->hsh_cache->id_sec == id_sec) |
| 1129 | { |
| 1130 | hsh = hh->hsh_cache; |
| 1131 | } |
| 1132 | else |
| 1133 | { |
| 1134 | char *stub_name; |
| 1135 | |
| 1136 | stub_name = metag_stub_name (id_sec, sym_sec, hh, rel); |
| 1137 | if (stub_name == NULL) |
| 1138 | return NULL; |
| 1139 | |
| 1140 | hsh = metag_stub_hash_lookup (&htab->bstab, |
| 1141 | stub_name, FALSE, FALSE); |
| 1142 | |
| 1143 | if (hh != NULL) |
| 1144 | hh->hsh_cache = hsh; |
| 1145 | |
| 1146 | free (stub_name); |
| 1147 | } |
| 1148 | |
| 1149 | return hsh; |
| 1150 | } |
| 1151 | |
| 1152 | /* Add a new stub entry to the stub hash. Not all fields of the new |
| 1153 | stub entry are initialised. */ |
| 1154 | |
| 1155 | static struct elf_metag_stub_hash_entry * |
| 1156 | metag_add_stub (const char *stub_name, |
| 1157 | asection *section, |
| 1158 | struct elf_metag_link_hash_table *htab) |
| 1159 | { |
| 1160 | asection *link_sec; |
| 1161 | asection *stub_sec; |
| 1162 | struct elf_metag_stub_hash_entry *hsh; |
| 1163 | |
| 1164 | link_sec = htab->stub_group[section->id].link_sec; |
| 1165 | stub_sec = htab->stub_group[section->id].stub_sec; |
| 1166 | if (stub_sec == NULL) |
| 1167 | { |
| 1168 | stub_sec = htab->stub_group[link_sec->id].stub_sec; |
| 1169 | if (stub_sec == NULL) |
| 1170 | { |
| 1171 | size_t namelen; |
| 1172 | bfd_size_type len; |
| 1173 | char *s_name; |
| 1174 | |
| 1175 | namelen = strlen (link_sec->name); |
| 1176 | len = namelen + sizeof (STUB_SUFFIX); |
| 1177 | s_name = bfd_alloc (htab->stub_bfd, len); |
| 1178 | if (s_name == NULL) |
| 1179 | return NULL; |
| 1180 | |
| 1181 | memcpy (s_name, link_sec->name, namelen); |
| 1182 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 1183 | |
| 1184 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); |
| 1185 | if (stub_sec == NULL) |
| 1186 | return NULL; |
| 1187 | htab->stub_group[link_sec->id].stub_sec = stub_sec; |
| 1188 | } |
| 1189 | htab->stub_group[section->id].stub_sec = stub_sec; |
| 1190 | } |
| 1191 | |
| 1192 | /* Enter this entry into the linker stub hash table. */ |
| 1193 | hsh = metag_stub_hash_lookup (&htab->bstab, stub_name, |
| 1194 | TRUE, FALSE); |
| 1195 | if (hsh == NULL) |
| 1196 | { |
| 1197 | (*_bfd_error_handler) (_("%B: cannot create stub entry %s"), |
| 1198 | section->owner, |
| 1199 | stub_name); |
| 1200 | return NULL; |
| 1201 | } |
| 1202 | |
| 1203 | hsh->stub_sec = stub_sec; |
| 1204 | hsh->stub_offset = 0; |
| 1205 | hsh->id_sec = link_sec; |
| 1206 | return hsh; |
| 1207 | } |
| 1208 | |
| 1209 | /* Check a signed integer value can be represented in the given number |
| 1210 | of bits. */ |
| 1211 | |
| 1212 | static bfd_boolean |
| 1213 | within_signed_range (int value, unsigned int bits) |
| 1214 | { |
| 1215 | int min_val = -(1 << (bits - 1)); |
| 1216 | int max_val = (1 << (bits - 1)) - 1; |
| 1217 | return (value <= max_val) && (value >= min_val); |
| 1218 | } |
| 1219 | |
| 1220 | /* Perform a relocation as part of a final link. */ |
| 1221 | |
| 1222 | static bfd_reloc_status_type |
| 1223 | metag_final_link_relocate (reloc_howto_type *howto, |
| 1224 | bfd *input_bfd, |
| 1225 | asection *input_section, |
| 1226 | bfd_byte *contents, |
| 1227 | Elf_Internal_Rela *rel, |
| 1228 | bfd_vma relocation, |
| 1229 | struct elf_metag_link_hash_entry *hh, |
| 1230 | struct elf_metag_link_hash_table *htab, |
| 1231 | asection *sym_sec) |
| 1232 | { |
| 1233 | bfd_reloc_status_type r = bfd_reloc_ok; |
| 1234 | bfd_byte *hit_data = contents + rel->r_offset; |
| 1235 | int opcode, op_shift, op_extended, l1, l2; |
| 1236 | bfd_signed_vma srel, addend = rel->r_addend; |
| 1237 | struct elf_metag_stub_hash_entry *hsh = NULL; |
| 1238 | bfd_vma location; |
| 1239 | |
| 1240 | /* Find out where we are and where we're going. */ |
| 1241 | location = (rel->r_offset + |
| 1242 | input_section->output_offset + |
| 1243 | input_section->output_section->vma); |
| 1244 | |
| 1245 | switch (howto->type) |
| 1246 | { |
| 1247 | case R_METAG_RELBRANCH: |
| 1248 | case R_METAG_RELBRANCH_PLT: |
| 1249 | /* Make it a pc relative offset. */ |
| 1250 | relocation -= location; |
| 1251 | break; |
| 1252 | case R_METAG_TLS_GD: |
| 1253 | case R_METAG_TLS_IE: |
| 1254 | relocation -= elf_gp (input_section->output_section->owner); |
| 1255 | break; |
| 1256 | default: |
| 1257 | break; |
| 1258 | } |
| 1259 | |
| 1260 | switch (howto->type) |
| 1261 | { |
| 1262 | case R_METAG_RELBRANCH_PLT: |
| 1263 | case R_METAG_RELBRANCH: |
| 1264 | opcode = bfd_get_32 (input_bfd, hit_data); |
| 1265 | |
| 1266 | srel = (bfd_signed_vma) relocation; |
| 1267 | srel += addend; |
| 1268 | |
| 1269 | /* If the branch is out of reach, then redirect the |
| 1270 | call to the local stub for this function. */ |
| 1271 | if (srel > ((1 << (BRANCH_BITS + 1)) - 1) || |
| 1272 | (srel < - (1 << (BRANCH_BITS + 1)))) |
| 1273 | { |
| 1274 | if (sym_sec == NULL) |
| 1275 | break; |
| 1276 | |
| 1277 | hsh = metag_get_stub_entry (input_section, sym_sec, |
| 1278 | hh, rel, htab); |
| 1279 | if (hsh == NULL) |
| 1280 | return bfd_reloc_undefined; |
| 1281 | |
| 1282 | /* Munge up the value and addend so that we call the stub |
| 1283 | rather than the procedure directly. */ |
| 1284 | srel = (hsh->stub_offset |
| 1285 | + hsh->stub_sec->output_offset |
| 1286 | + hsh->stub_sec->output_section->vma); |
| 1287 | srel -= location; |
| 1288 | } |
| 1289 | |
| 1290 | srel = srel >> 2; |
| 1291 | |
| 1292 | if (!within_signed_range (srel, BRANCH_BITS)) |
| 1293 | { |
| 1294 | if (hh && hh->eh.root.type == bfd_link_hash_undefweak) |
| 1295 | srel = 0; |
| 1296 | else |
| 1297 | return bfd_reloc_overflow; |
| 1298 | } |
| 1299 | |
| 1300 | opcode &= ~(0x7ffff << 5); |
| 1301 | opcode |= ((srel & 0x7ffff) << 5); |
| 1302 | |
| 1303 | bfd_put_32 (input_bfd, opcode, hit_data); |
| 1304 | break; |
| 1305 | case R_METAG_GETSETOFF: |
| 1306 | case R_METAG_GETSET_GOT: |
| 1307 | case R_METAG_GETSET_GOTOFF: |
| 1308 | opcode = bfd_get_32 (input_bfd, hit_data); |
| 1309 | |
| 1310 | srel = (bfd_signed_vma) relocation; |
| 1311 | srel += addend; |
| 1312 | |
| 1313 | /* Is this a standard or extended GET/SET? */ |
| 1314 | if ((opcode & 0xf0000000) == 0xa0000000) |
| 1315 | { |
| 1316 | /* Extended GET/SET. */ |
| 1317 | l1 = opcode & 0x2; |
| 1318 | l2 = opcode & 0x4; |
| 1319 | op_extended = 1; |
| 1320 | } |
| 1321 | else |
| 1322 | { |
| 1323 | /* Standard GET/SET. */ |
| 1324 | l1 = opcode & 0x01000000; |
| 1325 | l2 = opcode & 0x04000000; |
| 1326 | op_extended = 0; |
| 1327 | } |
| 1328 | |
| 1329 | /* Calculate the width of the GET/SET and how much we need to |
| 1330 | shift the result by. */ |
| 1331 | if (l2) |
| 1332 | if (l1) |
| 1333 | op_shift = 3; |
| 1334 | else |
| 1335 | op_shift = 2; |
| 1336 | else |
| 1337 | if (l1) |
| 1338 | op_shift = 1; |
| 1339 | else |
| 1340 | op_shift = 0; |
| 1341 | |
| 1342 | /* GET/SET offsets are scaled by the width of the transfer. */ |
| 1343 | srel = srel >> op_shift; |
| 1344 | |
| 1345 | /* Extended GET/SET has signed 12 bits of offset, standard has |
| 1346 | signed 6 bits. */ |
| 1347 | if (op_extended) |
| 1348 | { |
| 1349 | if (!within_signed_range (srel, 12)) |
| 1350 | { |
| 1351 | if (hh && hh->eh.root.type == bfd_link_hash_undefweak) |
| 1352 | srel = 0; |
| 1353 | else |
| 1354 | return bfd_reloc_overflow; |
| 1355 | } |
| 1356 | opcode &= ~(0xfff << 7); |
| 1357 | opcode |= ((srel & 0xfff) << 7); |
| 1358 | } |
| 1359 | else |
| 1360 | { |
| 1361 | if (!within_signed_range (srel, 5)) |
| 1362 | { |
| 1363 | if (hh && hh->eh.root.type == bfd_link_hash_undefweak) |
| 1364 | srel = 0; |
| 1365 | else |
| 1366 | return bfd_reloc_overflow; |
| 1367 | } |
| 1368 | opcode &= ~(0x3f << 8); |
| 1369 | opcode |= ((srel & 0x3f) << 8); |
| 1370 | } |
| 1371 | |
| 1372 | bfd_put_32 (input_bfd, opcode, hit_data); |
| 1373 | break; |
| 1374 | case R_METAG_TLS_GD: |
| 1375 | case R_METAG_TLS_LDM: |
| 1376 | opcode = bfd_get_32 (input_bfd, hit_data); |
| 1377 | |
| 1378 | if ((bfd_signed_vma)relocation < 0) |
| 1379 | { |
| 1380 | /* sign extend immediate */ |
| 1381 | if ((opcode & 0xf2000001) == 0x02000000) |
| 1382 | { |
| 1383 | /* ADD De.e,Dx.r,#I16 */ |
| 1384 | /* set SE bit */ |
| 1385 | opcode |= (1 << 1); |
| 1386 | } else |
| 1387 | return bfd_reloc_overflow; |
| 1388 | } |
| 1389 | |
| 1390 | bfd_put_32 (input_bfd, opcode, hit_data); |
| 1391 | |
| 1392 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 1393 | contents, rel->r_offset, |
| 1394 | relocation, rel->r_addend); |
| 1395 | break; |
| 1396 | default: |
| 1397 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 1398 | contents, rel->r_offset, |
| 1399 | relocation, rel->r_addend); |
| 1400 | } |
| 1401 | |
| 1402 | return r; |
| 1403 | } |
| 1404 | |
| 1405 | /* This is defined because R_METAG_NONE != 0... |
| 1406 | See RELOC_AGAINST_DISCARDED_SECTION for details. */ |
| 1407 | #define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \ |
| 1408 | rel, relend, howto, contents) \ |
| 1409 | { \ |
| 1410 | _bfd_clear_contents (howto, input_bfd, input_section, \ |
| 1411 | contents + rel->r_offset); \ |
| 1412 | \ |
| 1413 | if (info->relocatable \ |
| 1414 | && (input_section->flags & SEC_DEBUGGING)) \ |
| 1415 | { \ |
| 1416 | /* Only remove relocations in debug sections since other \ |
| 1417 | sections may require relocations. */ \ |
| 1418 | Elf_Internal_Shdr *rel_hdr; \ |
| 1419 | \ |
| 1420 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \ |
| 1421 | \ |
| 1422 | /* Avoid empty output section. */ \ |
| 1423 | if (rel_hdr->sh_size > rel_hdr->sh_entsize) \ |
| 1424 | { \ |
| 1425 | rel_hdr->sh_size -= rel_hdr->sh_entsize; \ |
| 1426 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); \ |
| 1427 | rel_hdr->sh_size -= rel_hdr->sh_entsize; \ |
| 1428 | \ |
| 1429 | memmove (rel, rel + 1, (relend - rel) * sizeof (*rel)); \ |
| 1430 | \ |
| 1431 | input_section->reloc_count--; \ |
| 1432 | relend--; \ |
| 1433 | rel--; \ |
| 1434 | continue; \ |
| 1435 | } \ |
| 1436 | } \ |
| 1437 | \ |
| 1438 | rel->r_info = R_METAG_NONE; \ |
| 1439 | rel->r_addend = 0; \ |
| 1440 | continue; \ |
| 1441 | } |
| 1442 | |
| 1443 | /* Relocate a META ELF section. |
| 1444 | |
| 1445 | The RELOCATE_SECTION function is called by the new ELF backend linker |
| 1446 | to handle the relocations for a section. |
| 1447 | |
| 1448 | The relocs are always passed as Rela structures; if the section |
| 1449 | actually uses Rel structures, the r_addend field will always be |
| 1450 | zero. |
| 1451 | |
| 1452 | This function is responsible for adjusting the section contents as |
| 1453 | necessary, and (if using Rela relocs and generating a relocatable |
| 1454 | output file) adjusting the reloc addend as necessary. |
| 1455 | |
| 1456 | This function does not have to worry about setting the reloc |
| 1457 | address or the reloc symbol index. |
| 1458 | |
| 1459 | LOCAL_SYMS is a pointer to the swapped in local symbols. |
| 1460 | |
| 1461 | LOCAL_SECTIONS is an array giving the section in the input file |
| 1462 | corresponding to the st_shndx field of each local symbol. |
| 1463 | |
| 1464 | The global hash table entry for the global symbols can be found |
| 1465 | via elf_sym_hashes (input_bfd). |
| 1466 | |
| 1467 | When generating relocatable output, this function must handle |
| 1468 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| 1469 | going to be the section symbol corresponding to the output |
| 1470 | section, which means that the addend must be adjusted |
| 1471 | accordingly. */ |
| 1472 | |
| 1473 | static bfd_boolean |
| 1474 | elf_metag_relocate_section (bfd *output_bfd, |
| 1475 | struct bfd_link_info *info, |
| 1476 | bfd *input_bfd, |
| 1477 | asection *input_section, |
| 1478 | bfd_byte *contents, |
| 1479 | Elf_Internal_Rela *relocs, |
| 1480 | Elf_Internal_Sym *local_syms, |
| 1481 | asection **local_sections) |
| 1482 | { |
| 1483 | bfd_vma *local_got_offsets; |
| 1484 | Elf_Internal_Shdr *symtab_hdr; |
| 1485 | struct elf_link_hash_entry **eh_syms; |
| 1486 | struct elf_metag_link_hash_table *htab; |
| 1487 | Elf_Internal_Rela *rel; |
| 1488 | Elf_Internal_Rela *relend; |
| 1489 | asection *sreloc; |
| 1490 | |
| 1491 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| 1492 | eh_syms = elf_sym_hashes (input_bfd); |
| 1493 | relend = relocs + input_section->reloc_count; |
| 1494 | |
| 1495 | htab = metag_link_hash_table (info); |
| 1496 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 1497 | |
| 1498 | sreloc = NULL; |
| 1499 | |
| 1500 | for (rel = relocs; rel < relend; rel ++) |
| 1501 | { |
| 1502 | reloc_howto_type *howto; |
| 1503 | unsigned long r_symndx; |
| 1504 | Elf_Internal_Sym *sym; |
| 1505 | asection *sec; |
| 1506 | struct elf_metag_link_hash_entry *hh; |
| 1507 | bfd_vma relocation; |
| 1508 | bfd_reloc_status_type r; |
| 1509 | const char *name; |
| 1510 | int r_type; |
| 1511 | |
| 1512 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1513 | |
| 1514 | if (r_type == R_METAG_GNU_VTINHERIT |
| 1515 | || r_type == R_METAG_GNU_VTENTRY |
| 1516 | || r_type == R_METAG_NONE) |
| 1517 | continue; |
| 1518 | |
| 1519 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1520 | |
| 1521 | howto = elf_metag_howto_table + ELF32_R_TYPE (rel->r_info); |
| 1522 | hh = NULL; |
| 1523 | sym = NULL; |
| 1524 | sec = NULL; |
| 1525 | |
| 1526 | if (r_symndx < symtab_hdr->sh_info) |
| 1527 | { |
| 1528 | sym = local_syms + r_symndx; |
| 1529 | sec = local_sections [r_symndx]; |
| 1530 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1531 | |
| 1532 | name = bfd_elf_string_from_elf_section |
| 1533 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 1534 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; |
| 1535 | } |
| 1536 | else |
| 1537 | { |
| 1538 | struct elf_link_hash_entry *eh; |
| 1539 | bfd_boolean unresolved_reloc, warned; |
| 1540 | |
| 1541 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1542 | r_symndx, symtab_hdr, eh_syms, |
| 1543 | eh, sec, relocation, |
| 1544 | unresolved_reloc, warned); |
| 1545 | |
| 1546 | name = eh->root.root.string; |
| 1547 | hh = (struct elf_metag_link_hash_entry *) eh; |
| 1548 | } |
| 1549 | |
| 1550 | if (sec != NULL && discarded_section (sec)) |
| 1551 | METAG_RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 1552 | rel, relend, howto, contents); |
| 1553 | |
| 1554 | if (info->relocatable) |
| 1555 | continue; |
| 1556 | |
| 1557 | switch (r_type) |
| 1558 | { |
| 1559 | case R_METAG_ADDR32: |
| 1560 | case R_METAG_RELBRANCH: |
| 1561 | if ((input_section->flags & SEC_ALLOC) == 0) |
| 1562 | break; |
| 1563 | |
| 1564 | if ((info->shared |
| 1565 | && r_symndx != STN_UNDEF |
| 1566 | && (input_section->flags & SEC_ALLOC) != 0 |
| 1567 | && (r_type != R_METAG_RELBRANCH |
| 1568 | || !SYMBOL_CALLS_LOCAL (info, &hh->eh))) |
| 1569 | || (!info->shared |
| 1570 | && hh != NULL |
| 1571 | && hh->eh.dynindx != -1 |
| 1572 | && !hh->eh.non_got_ref |
| 1573 | && ((hh->eh.def_dynamic |
| 1574 | && !hh->eh.def_regular) |
| 1575 | || hh->eh.root.type == bfd_link_hash_undefweak |
| 1576 | || hh->eh.root.type == bfd_link_hash_undefined))) |
| 1577 | { |
| 1578 | Elf_Internal_Rela outrel; |
| 1579 | bfd_boolean skip, relocate; |
| 1580 | bfd_byte *loc; |
| 1581 | |
| 1582 | /* When generating a shared object, these relocations |
| 1583 | are copied into the output file to be resolved at run |
| 1584 | time. */ |
| 1585 | |
| 1586 | sreloc = elf_section_data (input_section)->sreloc; |
| 1587 | BFD_ASSERT (sreloc != NULL); |
| 1588 | |
| 1589 | skip = FALSE; |
| 1590 | relocate = FALSE; |
| 1591 | |
| 1592 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
| 1593 | info, |
| 1594 | input_section, |
| 1595 | rel->r_offset); |
| 1596 | if (outrel.r_offset == (bfd_vma) -1) |
| 1597 | skip = TRUE; |
| 1598 | else if (outrel.r_offset == (bfd_vma) -2) |
| 1599 | skip = TRUE, relocate = TRUE; |
| 1600 | outrel.r_offset += (input_section->output_section->vma |
| 1601 | + input_section->output_offset); |
| 1602 | |
| 1603 | if (skip) |
| 1604 | { |
| 1605 | memset (&outrel, 0, sizeof outrel); |
| 1606 | outrel.r_info = ELF32_R_INFO (0, R_METAG_NONE); |
| 1607 | } |
| 1608 | else if (r_type == R_METAG_RELBRANCH) |
| 1609 | { |
| 1610 | BFD_ASSERT (hh != NULL && hh->eh.dynindx != -1); |
| 1611 | outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type); |
| 1612 | outrel.r_addend = rel->r_addend; |
| 1613 | } |
| 1614 | else |
| 1615 | { |
| 1616 | /* h->dynindx may be -1 if this symbol was marked to |
| 1617 | become local. */ |
| 1618 | if (hh == NULL |
| 1619 | || ((info->symbolic || hh->eh.dynindx == -1) |
| 1620 | && hh->eh.def_regular)) |
| 1621 | { |
| 1622 | relocate = TRUE; |
| 1623 | outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE); |
| 1624 | outrel.r_addend = relocation + rel->r_addend; |
| 1625 | } |
| 1626 | else |
| 1627 | { |
| 1628 | BFD_ASSERT (hh->eh.dynindx != -1); |
| 1629 | outrel.r_info = ELF32_R_INFO (hh->eh.dynindx, r_type); |
| 1630 | outrel.r_addend = rel->r_addend; |
| 1631 | } |
| 1632 | } |
| 1633 | |
| 1634 | loc = sreloc->contents; |
| 1635 | loc += sreloc->reloc_count * sizeof(Elf32_External_Rela); |
| 1636 | bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); |
| 1637 | ++sreloc->reloc_count; |
| 1638 | |
| 1639 | /* If this reloc is against an external symbol, we do |
| 1640 | not want to fiddle with the addend. Otherwise, we |
| 1641 | need to include the symbol value so that it becomes |
| 1642 | an addend for the dynamic reloc. */ |
| 1643 | if (! relocate) |
| 1644 | continue; |
| 1645 | } |
| 1646 | break; |
| 1647 | |
| 1648 | case R_METAG_RELBRANCH_PLT: |
| 1649 | /* Relocation is to the entry for this symbol in the |
| 1650 | procedure linkage table. */ |
| 1651 | |
| 1652 | if (hh == NULL) |
| 1653 | break; |
| 1654 | |
| 1655 | if (hh->eh.forced_local) |
| 1656 | break; |
| 1657 | |
| 1658 | if (hh->eh.plt.offset == (bfd_vma) -1 || |
| 1659 | htab->splt == NULL) |
| 1660 | { |
| 1661 | /* We didn't make a PLT entry for this symbol. This |
| 1662 | happens when statically linking PIC code, or when |
| 1663 | using -Bsymbolic. */ |
| 1664 | break; |
| 1665 | } |
| 1666 | |
| 1667 | relocation = (htab->splt->output_section->vma |
| 1668 | + htab->splt->output_offset |
| 1669 | + hh->eh.plt.offset); |
| 1670 | break; |
| 1671 | case R_METAG_HI16_GOTPC: |
| 1672 | case R_METAG_LO16_GOTPC: |
| 1673 | BFD_ASSERT (htab->sgot != NULL); |
| 1674 | |
| 1675 | relocation = (htab->sgot->output_section->vma + |
| 1676 | htab->sgot->output_offset); |
| 1677 | relocation += GOT_REG_OFFSET; |
| 1678 | relocation -= (input_section->output_section->vma |
| 1679 | + input_section->output_offset |
| 1680 | + rel->r_offset); |
| 1681 | break; |
| 1682 | case R_METAG_HI16_GOTOFF: |
| 1683 | case R_METAG_LO16_GOTOFF: |
| 1684 | case R_METAG_GETSET_GOTOFF: |
| 1685 | BFD_ASSERT (htab->sgot != NULL); |
| 1686 | |
| 1687 | relocation -= (htab->sgot->output_section->vma + |
| 1688 | htab->sgot->output_offset); |
| 1689 | relocation -= GOT_REG_OFFSET; |
| 1690 | break; |
| 1691 | case R_METAG_GETSET_GOT: |
| 1692 | { |
| 1693 | bfd_vma off; |
| 1694 | bfd_boolean do_got = 0; |
| 1695 | |
| 1696 | /* Relocation is to the entry for this symbol in the |
| 1697 | global offset table. */ |
| 1698 | if (hh != NULL) |
| 1699 | { |
| 1700 | bfd_boolean dyn; |
| 1701 | |
| 1702 | off = hh->eh.got.offset; |
| 1703 | dyn = htab->etab.dynamic_sections_created; |
| 1704 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, |
| 1705 | &hh->eh)) |
| 1706 | { |
| 1707 | /* If we aren't going to call finish_dynamic_symbol, |
| 1708 | then we need to handle initialisation of the .got |
| 1709 | entry and create needed relocs here. Since the |
| 1710 | offset must always be a multiple of 4, we use the |
| 1711 | least significant bit to record whether we have |
| 1712 | initialised it already. */ |
| 1713 | if ((off & 1) != 0) |
| 1714 | off &= ~1; |
| 1715 | else |
| 1716 | { |
| 1717 | hh->eh.got.offset |= 1; |
| 1718 | do_got = 1; |
| 1719 | } |
| 1720 | } |
| 1721 | } |
| 1722 | else |
| 1723 | { |
| 1724 | /* Local symbol case. */ |
| 1725 | if (local_got_offsets == NULL) |
| 1726 | abort (); |
| 1727 | |
| 1728 | off = local_got_offsets[r_symndx]; |
| 1729 | |
| 1730 | /* The offset must always be a multiple of 4. We use |
| 1731 | the least significant bit to record whether we have |
| 1732 | already generated the necessary reloc. */ |
| 1733 | if ((off & 1) != 0) |
| 1734 | off &= ~1; |
| 1735 | else |
| 1736 | { |
| 1737 | local_got_offsets[r_symndx] |= 1; |
| 1738 | do_got = 1; |
| 1739 | } |
| 1740 | } |
| 1741 | |
| 1742 | if (do_got) |
| 1743 | { |
| 1744 | if (info->shared) |
| 1745 | { |
| 1746 | /* Output a dynamic relocation for this GOT entry. |
| 1747 | In this case it is relative to the base of the |
| 1748 | object because the symbol index is zero. */ |
| 1749 | Elf_Internal_Rela outrel; |
| 1750 | bfd_byte *loc; |
| 1751 | asection *s = htab->srelgot; |
| 1752 | |
| 1753 | outrel.r_offset = (off |
| 1754 | + htab->sgot->output_offset |
| 1755 | + htab->sgot->output_section->vma); |
| 1756 | outrel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE); |
| 1757 | outrel.r_addend = relocation; |
| 1758 | loc = s->contents; |
| 1759 | loc += s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1760 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1761 | } |
| 1762 | else |
| 1763 | bfd_put_32 (output_bfd, relocation, |
| 1764 | htab->sgot->contents + off); |
| 1765 | } |
| 1766 | |
| 1767 | if (off >= (bfd_vma) -2) |
| 1768 | abort (); |
| 1769 | |
| 1770 | relocation = off - GOT_REG_OFFSET; |
| 1771 | } |
| 1772 | break; |
| 1773 | case R_METAG_TLS_GD: |
| 1774 | case R_METAG_TLS_IE: |
| 1775 | { |
| 1776 | /* XXXMJF There is room here for optimisations. For example |
| 1777 | converting from GD->IE, etc. */ |
| 1778 | bfd_vma off; |
| 1779 | int indx; |
| 1780 | char tls_type; |
| 1781 | |
| 1782 | if (htab->sgot == NULL) |
| 1783 | abort(); |
| 1784 | |
| 1785 | indx = 0; |
| 1786 | if (hh != NULL) |
| 1787 | { |
| 1788 | bfd_boolean dyn; |
| 1789 | dyn = htab->etab.dynamic_sections_created; |
| 1790 | |
| 1791 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, &hh->eh) |
| 1792 | && (!info->shared |
| 1793 | || !SYMBOL_REFERENCES_LOCAL (info, &hh->eh))) |
| 1794 | { |
| 1795 | indx = hh->eh.dynindx; |
| 1796 | } |
| 1797 | off = hh->eh.got.offset; |
| 1798 | tls_type = hh->tls_type; |
| 1799 | } |
| 1800 | else |
| 1801 | { |
| 1802 | /* Local symbol case. */ |
| 1803 | if (local_got_offsets == NULL) |
| 1804 | abort (); |
| 1805 | |
| 1806 | off = local_got_offsets[r_symndx]; |
| 1807 | tls_type = metag_elf_local_got_tls_type (input_bfd) [r_symndx]; |
| 1808 | } |
| 1809 | |
| 1810 | if (tls_type == GOT_UNKNOWN) |
| 1811 | abort(); |
| 1812 | |
| 1813 | if ((off & 1) != 0) |
| 1814 | off &= ~1; |
| 1815 | else |
| 1816 | { |
| 1817 | bfd_boolean need_relocs = FALSE; |
| 1818 | Elf_Internal_Rela outrel; |
| 1819 | bfd_byte *loc = NULL; |
| 1820 | int cur_off = off; |
| 1821 | |
| 1822 | /* The GOT entries have not been initialized yet. Do it |
| 1823 | now, and emit any relocations. If both an IE GOT and a |
| 1824 | GD GOT are necessary, we emit the GD first. */ |
| 1825 | |
| 1826 | if ((info->shared || indx != 0) |
| 1827 | && (hh == NULL |
| 1828 | || ELF_ST_VISIBILITY (hh->eh.other) == STV_DEFAULT |
| 1829 | || hh->eh.root.type != bfd_link_hash_undefweak)) |
| 1830 | { |
| 1831 | need_relocs = TRUE; |
| 1832 | loc = htab->srelgot->contents; |
| 1833 | /* FIXME (CAO): Should this be reloc_count++ ? */ |
| 1834 | loc += htab->srelgot->reloc_count * sizeof (Elf32_External_Rela); |
| 1835 | } |
| 1836 | |
| 1837 | if (tls_type & GOT_TLS_GD) |
| 1838 | { |
| 1839 | if (need_relocs) |
| 1840 | { |
| 1841 | outrel.r_offset = (cur_off |
| 1842 | + htab->sgot->output_section->vma |
| 1843 | + htab->sgot->output_offset); |
| 1844 | outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_DTPMOD); |
| 1845 | outrel.r_addend = 0; |
| 1846 | bfd_put_32 (output_bfd, 0, htab->sgot->contents + cur_off); |
| 1847 | |
| 1848 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1849 | htab->srelgot->reloc_count++; |
| 1850 | loc += sizeof (Elf32_External_Rela); |
| 1851 | |
| 1852 | if (indx == 0) |
| 1853 | bfd_put_32 (output_bfd, 0, |
| 1854 | htab->sgot->contents + cur_off + 4); |
| 1855 | else |
| 1856 | { |
| 1857 | bfd_put_32 (output_bfd, 0, |
| 1858 | htab->sgot->contents + cur_off + 4); |
| 1859 | outrel.r_info = ELF32_R_INFO (indx, |
| 1860 | R_METAG_TLS_DTPOFF); |
| 1861 | outrel.r_offset += 4; |
| 1862 | bfd_elf32_swap_reloca_out (output_bfd, |
| 1863 | &outrel, loc); |
| 1864 | htab->srelgot->reloc_count++; |
| 1865 | loc += sizeof (Elf32_External_Rela); |
| 1866 | } |
| 1867 | } |
| 1868 | else |
| 1869 | { |
| 1870 | /* We don't support changing the TLS model. */ |
| 1871 | abort (); |
| 1872 | } |
| 1873 | |
| 1874 | cur_off += 8; |
| 1875 | } |
| 1876 | |
| 1877 | if (tls_type & GOT_TLS_IE) |
| 1878 | { |
| 1879 | if (need_relocs) |
| 1880 | { |
| 1881 | outrel.r_offset = (cur_off |
| 1882 | + htab->sgot->output_section->vma |
| 1883 | + htab->sgot->output_offset); |
| 1884 | outrel.r_info = ELF32_R_INFO (indx, R_METAG_TLS_TPOFF); |
| 1885 | |
| 1886 | if (indx == 0) |
| 1887 | outrel.r_addend = relocation - dtpoff_base (info); |
| 1888 | else |
| 1889 | outrel.r_addend = 0; |
| 1890 | |
| 1891 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1892 | htab->srelgot->reloc_count++; |
| 1893 | loc += sizeof (Elf32_External_Rela); |
| 1894 | } |
| 1895 | else |
| 1896 | bfd_put_32 (output_bfd, tpoff (info, relocation), |
| 1897 | htab->sgot->contents + cur_off); |
| 1898 | |
| 1899 | cur_off += 4; |
| 1900 | } |
| 1901 | |
| 1902 | if (hh != NULL) |
| 1903 | hh->eh.got.offset |= 1; |
| 1904 | else |
| 1905 | local_got_offsets[r_symndx] |= 1; |
| 1906 | } |
| 1907 | |
| 1908 | /* Add the base of the GOT to the relocation value. */ |
| 1909 | relocation = off - GOT_REG_OFFSET; |
| 1910 | |
| 1911 | break; |
| 1912 | } |
| 1913 | |
| 1914 | case R_METAG_TLS_IENONPIC_HI16: |
| 1915 | case R_METAG_TLS_IENONPIC_LO16: |
| 1916 | case R_METAG_TLS_LE_HI16: |
| 1917 | case R_METAG_TLS_LE_LO16: |
| 1918 | if (info->shared) |
| 1919 | { |
| 1920 | (*_bfd_error_handler) |
| 1921 | (_("%B(%A+0x%lx): R_METAG_TLS_LE/IENONPIC relocation not permitted in shared object"), |
| 1922 | input_bfd, input_section, |
| 1923 | (long) rel->r_offset, howto->name); |
| 1924 | return FALSE; |
| 1925 | } |
| 1926 | else |
| 1927 | relocation = tpoff (info, relocation); |
| 1928 | break; |
| 1929 | case R_METAG_TLS_LDO_HI16: |
| 1930 | case R_METAG_TLS_LDO_LO16: |
| 1931 | if (! info->shared) |
| 1932 | relocation = tpoff (info, relocation); |
| 1933 | else |
| 1934 | relocation -= dtpoff_base (info); |
| 1935 | break; |
| 1936 | case R_METAG_TLS_LDM: |
| 1937 | { |
| 1938 | bfd_vma off; |
| 1939 | |
| 1940 | if (htab->sgot == NULL) |
| 1941 | abort(); |
| 1942 | off = htab->tls_ldm_got.offset; |
| 1943 | if (off & 1) |
| 1944 | off &= ~1; |
| 1945 | else |
| 1946 | { |
| 1947 | Elf_Internal_Rela outrel; |
| 1948 | bfd_byte *loc; |
| 1949 | |
| 1950 | outrel.r_offset = (off |
| 1951 | + htab->sgot->output_section->vma |
| 1952 | + htab->sgot->output_offset); |
| 1953 | |
| 1954 | outrel.r_addend = 0; |
| 1955 | outrel.r_info = ELF32_R_INFO (0, R_METAG_TLS_DTPMOD); |
| 1956 | loc = htab->srelgot->contents; |
| 1957 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); |
| 1958 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 1959 | htab->tls_ldm_got.offset |= 1; |
| 1960 | } |
| 1961 | |
| 1962 | relocation = off - GOT_REG_OFFSET; |
| 1963 | break; |
| 1964 | } |
| 1965 | default: |
| 1966 | break; |
| 1967 | } |
| 1968 | |
| 1969 | r = metag_final_link_relocate (howto, input_bfd, input_section, |
| 1970 | contents, rel, relocation, hh, htab, |
| 1971 | sec); |
| 1972 | |
| 1973 | if (r != bfd_reloc_ok) |
| 1974 | { |
| 1975 | const char * msg = (const char *) NULL; |
| 1976 | |
| 1977 | switch (r) |
| 1978 | { |
| 1979 | case bfd_reloc_overflow: |
| 1980 | r = info->callbacks->reloc_overflow |
| 1981 | (info, (hh ? &hh->eh.root : NULL), name, howto->name, |
| 1982 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 1983 | break; |
| 1984 | |
| 1985 | case bfd_reloc_undefined: |
| 1986 | r = info->callbacks->undefined_symbol |
| 1987 | (info, name, input_bfd, input_section, rel->r_offset, |
| 1988 | TRUE); |
| 1989 | break; |
| 1990 | |
| 1991 | case bfd_reloc_outofrange: |
| 1992 | msg = _("internal error: out of range error"); |
| 1993 | break; |
| 1994 | |
| 1995 | case bfd_reloc_notsupported: |
| 1996 | msg = _("internal error: unsupported relocation error"); |
| 1997 | break; |
| 1998 | |
| 1999 | case bfd_reloc_dangerous: |
| 2000 | msg = _("internal error: dangerous relocation"); |
| 2001 | break; |
| 2002 | |
| 2003 | default: |
| 2004 | msg = _("internal error: unknown error"); |
| 2005 | break; |
| 2006 | } |
| 2007 | |
| 2008 | if (msg) |
| 2009 | r = info->callbacks->warning |
| 2010 | (info, msg, name, input_bfd, input_section, rel->r_offset); |
| 2011 | |
| 2012 | if (! r) |
| 2013 | return FALSE; |
| 2014 | } |
| 2015 | } |
| 2016 | |
| 2017 | return TRUE; |
| 2018 | } |
| 2019 | |
| 2020 | /* Create the .plt and .got sections, and set up our hash table |
| 2021 | short-cuts to various dynamic sections. */ |
| 2022 | |
| 2023 | static bfd_boolean |
| 2024 | elf_metag_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| 2025 | { |
| 2026 | struct elf_metag_link_hash_table *htab; |
| 2027 | struct elf_link_hash_entry *eh; |
| 2028 | struct bfd_link_hash_entry *bh; |
| 2029 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 2030 | |
| 2031 | /* Don't try to create the .plt and .got twice. */ |
| 2032 | htab = metag_link_hash_table (info); |
| 2033 | if (htab->splt != NULL) |
| 2034 | return TRUE; |
| 2035 | |
| 2036 | /* Call the generic code to do most of the work. */ |
| 2037 | if (! _bfd_elf_create_dynamic_sections (abfd, info)) |
| 2038 | return FALSE; |
| 2039 | |
| 2040 | htab->sgot = bfd_get_linker_section (abfd, ".got"); |
| 2041 | if (! htab->sgot) |
| 2042 | return FALSE; |
| 2043 | |
| 2044 | htab->sgotplt = bfd_make_section_with_flags (abfd, ".got.plt", |
| 2045 | (SEC_ALLOC | SEC_LOAD | |
| 2046 | SEC_HAS_CONTENTS | |
| 2047 | SEC_IN_MEMORY | |
| 2048 | SEC_LINKER_CREATED)); |
| 2049 | if (htab->sgotplt == NULL |
| 2050 | || !bfd_set_section_alignment (abfd, htab->sgotplt, 2)) |
| 2051 | return FALSE; |
| 2052 | |
| 2053 | /* Define the symbol __GLOBAL_OFFSET_TABLE__ at the start of the .got |
| 2054 | section. We don't do this in the linker script because we don't want |
| 2055 | to define the symbol if we are not creating a global offset table. */ |
| 2056 | bh = NULL; |
| 2057 | if (!(_bfd_generic_link_add_one_symbol |
| 2058 | (info, abfd, "__GLOBAL_OFFSET_TABLE__", BSF_GLOBAL, htab->sgot, |
| 2059 | (bfd_vma) 0, NULL, FALSE, bed->collect, &bh))) |
| 2060 | return FALSE; |
| 2061 | eh = (struct elf_link_hash_entry *) bh; |
| 2062 | eh->def_regular = 1; |
| 2063 | eh->type = STT_OBJECT; |
| 2064 | eh->other = STV_HIDDEN; |
| 2065 | |
| 2066 | if (! info->executable |
| 2067 | && ! bfd_elf_link_record_dynamic_symbol (info, eh)) |
| 2068 | return FALSE; |
| 2069 | |
| 2070 | elf_hash_table (info)->hgot = eh; |
| 2071 | |
| 2072 | htab->splt = bfd_get_linker_section (abfd, ".plt"); |
| 2073 | htab->srelplt = bfd_get_linker_section (abfd, ".rela.plt"); |
| 2074 | |
| 2075 | htab->srelgot = bfd_get_linker_section (abfd, ".rela.got"); |
| 2076 | |
| 2077 | htab->sdynbss = bfd_get_linker_section (abfd, ".dynbss"); |
| 2078 | htab->srelbss = bfd_get_linker_section (abfd, ".rela.bss"); |
| 2079 | |
| 2080 | return TRUE; |
| 2081 | } |
| 2082 | |
| 2083 | /* Look through the relocs for a section during the first phase, and |
| 2084 | calculate needed space in the global offset table, procedure linkage |
| 2085 | table, and dynamic reloc sections. At this point we haven't |
| 2086 | necessarily read all the input files. */ |
| 2087 | |
| 2088 | static bfd_boolean |
| 2089 | elf_metag_check_relocs (bfd *abfd, |
| 2090 | struct bfd_link_info *info, |
| 2091 | asection *sec, |
| 2092 | const Elf_Internal_Rela *relocs) |
| 2093 | { |
| 2094 | Elf_Internal_Shdr *symtab_hdr; |
| 2095 | struct elf_link_hash_entry **eh_syms; |
| 2096 | const Elf_Internal_Rela *rel; |
| 2097 | const Elf_Internal_Rela *rel_end; |
| 2098 | struct elf_metag_link_hash_table *htab; |
| 2099 | asection *sreloc; |
| 2100 | bfd *dynobj; |
| 2101 | int tls_type = GOT_UNKNOWN, old_tls_type = GOT_UNKNOWN; |
| 2102 | |
| 2103 | if (info->relocatable) |
| 2104 | return TRUE; |
| 2105 | |
| 2106 | htab = metag_link_hash_table (info); |
| 2107 | dynobj = htab->etab.dynobj; |
| 2108 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 2109 | eh_syms = elf_sym_hashes (abfd); |
| 2110 | sreloc = NULL; |
| 2111 | |
| 2112 | if (htab == NULL) |
| 2113 | return FALSE; |
| 2114 | |
| 2115 | rel_end = relocs + sec->reloc_count; |
| 2116 | for (rel = relocs; rel < rel_end; rel++) |
| 2117 | { |
| 2118 | int r_type; |
| 2119 | struct elf_metag_link_hash_entry *hh; |
| 2120 | Elf_Internal_Sym *isym; |
| 2121 | unsigned long r_symndx; |
| 2122 | |
| 2123 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2124 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2125 | if (r_symndx < symtab_hdr->sh_info) |
| 2126 | { |
| 2127 | /* A local symbol. */ |
| 2128 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 2129 | abfd, r_symndx); |
| 2130 | if (isym == NULL) |
| 2131 | return FALSE; |
| 2132 | |
| 2133 | hh = NULL; |
| 2134 | } |
| 2135 | else |
| 2136 | { |
| 2137 | isym = NULL; |
| 2138 | |
| 2139 | hh = (struct elf_metag_link_hash_entry *) |
| 2140 | eh_syms[r_symndx - symtab_hdr->sh_info]; |
| 2141 | while (hh->eh.root.type == bfd_link_hash_indirect |
| 2142 | || hh->eh.root.type == bfd_link_hash_warning) |
| 2143 | hh = (struct elf_metag_link_hash_entry *) hh->eh.root.u.i.link; |
| 2144 | } |
| 2145 | |
| 2146 | /* Some relocs require a global offset table. */ |
| 2147 | if (htab->sgot == NULL) |
| 2148 | { |
| 2149 | switch (r_type) |
| 2150 | { |
| 2151 | case R_METAG_TLS_GD: |
| 2152 | case R_METAG_TLS_LDM: |
| 2153 | case R_METAG_TLS_IE: |
| 2154 | if (info->shared) |
| 2155 | info->flags |= DF_STATIC_TLS; |
| 2156 | /* Fall through. */ |
| 2157 | |
| 2158 | case R_METAG_HI16_GOTOFF: |
| 2159 | case R_METAG_LO16_GOTOFF: |
| 2160 | case R_METAG_GETSET_GOTOFF: |
| 2161 | case R_METAG_GETSET_GOT: |
| 2162 | case R_METAG_HI16_GOTPC: |
| 2163 | case R_METAG_LO16_GOTPC: |
| 2164 | if (dynobj == NULL) |
| 2165 | htab->etab.dynobj = dynobj = abfd; |
| 2166 | if (!elf_metag_create_dynamic_sections (dynobj, info)) |
| 2167 | return FALSE; |
| 2168 | break; |
| 2169 | |
| 2170 | default: |
| 2171 | break; |
| 2172 | } |
| 2173 | } |
| 2174 | |
| 2175 | switch (r_type) |
| 2176 | { |
| 2177 | case R_METAG_TLS_IE: |
| 2178 | case R_METAG_TLS_GD: |
| 2179 | case R_METAG_GETSET_GOT: |
| 2180 | switch (r_type) |
| 2181 | { |
| 2182 | default: |
| 2183 | tls_type = GOT_NORMAL; |
| 2184 | break; |
| 2185 | case R_METAG_TLS_IE: |
| 2186 | tls_type = GOT_TLS_IE; |
| 2187 | break; |
| 2188 | case R_METAG_TLS_GD: |
| 2189 | tls_type = GOT_TLS_GD; |
| 2190 | break; |
| 2191 | } |
| 2192 | |
| 2193 | if (hh != NULL) |
| 2194 | { |
| 2195 | hh->eh.got.refcount += 1; |
| 2196 | old_tls_type = hh->tls_type; |
| 2197 | } |
| 2198 | else |
| 2199 | { |
| 2200 | bfd_signed_vma *local_got_refcounts; |
| 2201 | |
| 2202 | /* This is a global offset table entry for a local |
| 2203 | symbol. */ |
| 2204 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 2205 | if (local_got_refcounts == NULL) |
| 2206 | { |
| 2207 | bfd_size_type size; |
| 2208 | |
| 2209 | size = symtab_hdr->sh_info; |
| 2210 | size *= sizeof (bfd_signed_vma); |
| 2211 | /* Add in space to store the local GOT TLS types. */ |
| 2212 | size += symtab_hdr->sh_info; |
| 2213 | local_got_refcounts = ((bfd_signed_vma *) |
| 2214 | bfd_zalloc (abfd, size)); |
| 2215 | if (local_got_refcounts == NULL) |
| 2216 | return FALSE; |
| 2217 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 2218 | memset (metag_elf_local_got_tls_type (abfd), |
| 2219 | GOT_UNKNOWN, symtab_hdr->sh_info); |
| 2220 | } |
| 2221 | local_got_refcounts[r_symndx] += 1; |
| 2222 | old_tls_type = metag_elf_local_got_tls_type (abfd) [r_symndx]; |
| 2223 | } |
| 2224 | |
| 2225 | if (old_tls_type != tls_type) |
| 2226 | { |
| 2227 | if (hh != NULL) |
| 2228 | { |
| 2229 | hh->tls_type = tls_type; |
| 2230 | } |
| 2231 | else |
| 2232 | { |
| 2233 | metag_elf_local_got_tls_type (abfd) [r_symndx] = tls_type; |
| 2234 | } |
| 2235 | } |
| 2236 | |
| 2237 | break; |
| 2238 | |
| 2239 | case R_METAG_TLS_LDM: |
| 2240 | metag_link_hash_table (info)->tls_ldm_got.refcount += 1; |
| 2241 | break; |
| 2242 | |
| 2243 | case R_METAG_RELBRANCH_PLT: |
| 2244 | /* This symbol requires a procedure linkage table entry. We |
| 2245 | actually build the entry in adjust_dynamic_symbol, |
| 2246 | because this might be a case of linking PIC code without |
| 2247 | linking in any dynamic objects, in which case we don't |
| 2248 | need to generate a procedure linkage table after all. */ |
| 2249 | |
| 2250 | /* If this is a local symbol, we resolve it directly without |
| 2251 | creating a procedure linkage table entry. */ |
| 2252 | if (hh == NULL) |
| 2253 | continue; |
| 2254 | |
| 2255 | if (hh->eh.forced_local) |
| 2256 | break; |
| 2257 | |
| 2258 | hh->eh.needs_plt = 1; |
| 2259 | hh->eh.plt.refcount += 1; |
| 2260 | break; |
| 2261 | |
| 2262 | case R_METAG_HIADDR16: |
| 2263 | case R_METAG_LOADDR16: |
| 2264 | /* Let's help debug shared library creation. These relocs |
| 2265 | cannot be used in shared libs. Don't error out for |
| 2266 | sections we don't care about, such as debug sections or |
| 2267 | non-constant sections. */ |
| 2268 | if (info->shared |
| 2269 | && (sec->flags & SEC_ALLOC) != 0 |
| 2270 | && (sec->flags & SEC_READONLY) != 0) |
| 2271 | { |
| 2272 | const char *name; |
| 2273 | |
| 2274 | if (hh) |
| 2275 | name = hh->eh.root.root.string; |
| 2276 | else |
| 2277 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); |
| 2278 | (*_bfd_error_handler) |
| 2279 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
| 2280 | abfd, elf_metag_howto_table[r_type].name, name); |
| 2281 | bfd_set_error (bfd_error_bad_value); |
| 2282 | return FALSE; |
| 2283 | } |
| 2284 | |
| 2285 | /* Fall through. */ |
| 2286 | case R_METAG_ADDR32: |
| 2287 | case R_METAG_RELBRANCH: |
| 2288 | case R_METAG_GETSETOFF: |
| 2289 | if (hh != NULL && !info->shared) |
| 2290 | { |
| 2291 | hh->eh.non_got_ref = 1; |
| 2292 | hh->eh.plt.refcount += 1; |
| 2293 | } |
| 2294 | |
| 2295 | /* If we are creating a shared library, and this is a reloc |
| 2296 | against a global symbol, or a non PC relative reloc |
| 2297 | against a local symbol, then we need to copy the reloc |
| 2298 | into the shared library. However, if we are linking with |
| 2299 | -Bsymbolic, we do not need to copy a reloc against a |
| 2300 | global symbol which is defined in an object we are |
| 2301 | including in the link (i.e., DEF_REGULAR is set). At |
| 2302 | this point we have not seen all the input files, so it is |
| 2303 | possible that DEF_REGULAR is not set now but will be set |
| 2304 | later (it is never cleared). We account for that |
| 2305 | possibility below by storing information in the |
| 2306 | dyn_relocs field of the hash table entry. A similar |
| 2307 | situation occurs when creating shared libraries and symbol |
| 2308 | visibility changes render the symbol local. |
| 2309 | |
| 2310 | If on the other hand, we are creating an executable, we |
| 2311 | may need to keep relocations for symbols satisfied by a |
| 2312 | dynamic library if we manage to avoid copy relocs for the |
| 2313 | symbol. */ |
| 2314 | if ((info->shared |
| 2315 | && (sec->flags & SEC_ALLOC) != 0 |
| 2316 | && (r_type != R_METAG_RELBRANCH |
| 2317 | || (hh != NULL |
| 2318 | && (! info->symbolic |
| 2319 | || hh->eh.root.type == bfd_link_hash_defweak |
| 2320 | || !hh->eh.def_regular)))) |
| 2321 | || (!info->shared |
| 2322 | && (sec->flags & SEC_ALLOC) != 0 |
| 2323 | && hh != NULL |
| 2324 | && (hh->eh.root.type == bfd_link_hash_defweak |
| 2325 | || !hh->eh.def_regular))) |
| 2326 | { |
| 2327 | struct elf_metag_dyn_reloc_entry *hdh_p; |
| 2328 | struct elf_metag_dyn_reloc_entry **hdh_head; |
| 2329 | |
| 2330 | if (dynobj == NULL) |
| 2331 | htab->etab.dynobj = dynobj = abfd; |
| 2332 | |
| 2333 | /* When creating a shared object, we must copy these |
| 2334 | relocs into the output file. We create a reloc |
| 2335 | section in dynobj and make room for the reloc. */ |
| 2336 | if (sreloc == NULL) |
| 2337 | { |
| 2338 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 2339 | (sec, htab->etab.dynobj, 2, abfd, /*rela?*/ TRUE); |
| 2340 | |
| 2341 | if (sreloc == NULL) |
| 2342 | { |
| 2343 | bfd_set_error (bfd_error_bad_value); |
| 2344 | return FALSE; |
| 2345 | } |
| 2346 | |
| 2347 | elf_section_data (sec)->sreloc = sreloc; |
| 2348 | } |
| 2349 | |
| 2350 | /* If this is a global symbol, we count the number of |
| 2351 | relocations we need for this symbol. */ |
| 2352 | if (hh != NULL) |
| 2353 | hdh_head = &((struct elf_metag_link_hash_entry *) hh)->dyn_relocs; |
| 2354 | else |
| 2355 | { |
| 2356 | /* Track dynamic relocs needed for local syms too. */ |
| 2357 | asection *sr; |
| 2358 | void *vpp; |
| 2359 | |
| 2360 | sr = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 2361 | if (sr == NULL) |
| 2362 | sr = sec; |
| 2363 | |
| 2364 | vpp = &elf_section_data (sr)->local_dynrel; |
| 2365 | hdh_head = (struct elf_metag_dyn_reloc_entry **) vpp; |
| 2366 | } |
| 2367 | |
| 2368 | hdh_p = *hdh_head; |
| 2369 | if (hdh_p == NULL || hdh_p->sec != sec) |
| 2370 | { |
| 2371 | hdh_p = ((struct elf_metag_dyn_reloc_entry *) |
| 2372 | bfd_alloc (dynobj, sizeof *hdh_p)); |
| 2373 | if (hdh_p == NULL) |
| 2374 | return FALSE; |
| 2375 | hdh_p->hdh_next = *hdh_head; |
| 2376 | *hdh_head = hdh_p; |
| 2377 | hdh_p->sec = sec; |
| 2378 | hdh_p->count = 0; |
| 2379 | hdh_p->relative_count = 0; |
| 2380 | } |
| 2381 | |
| 2382 | hdh_p->count += 1; |
| 2383 | if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH) |
| 2384 | hdh_p->relative_count += 1; |
| 2385 | } |
| 2386 | break; |
| 2387 | |
| 2388 | /* This relocation describes the C++ object vtable hierarchy. |
| 2389 | Reconstruct it for later use during GC. */ |
| 2390 | case R_METAG_GNU_VTINHERIT: |
| 2391 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, &hh->eh, |
| 2392 | rel->r_offset)) |
| 2393 | return FALSE; |
| 2394 | break; |
| 2395 | |
| 2396 | /* This relocation describes which C++ vtable entries are actually |
| 2397 | used. Record for later use during GC. */ |
| 2398 | case R_METAG_GNU_VTENTRY: |
| 2399 | BFD_ASSERT (hh != NULL); |
| 2400 | if (hh != NULL |
| 2401 | && !bfd_elf_gc_record_vtentry (abfd, sec, &hh->eh, rel->r_addend)) |
| 2402 | return FALSE; |
| 2403 | break; |
| 2404 | } |
| 2405 | } |
| 2406 | |
| 2407 | return TRUE; |
| 2408 | } |
| 2409 | |
| 2410 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2411 | |
| 2412 | static void |
| 2413 | elf_metag_copy_indirect_symbol (struct bfd_link_info *info, |
| 2414 | struct elf_link_hash_entry *eh_dir, |
| 2415 | struct elf_link_hash_entry *eh_ind) |
| 2416 | { |
| 2417 | struct elf_metag_link_hash_entry *hh_dir, *hh_ind; |
| 2418 | |
| 2419 | hh_dir = metag_elf_hash_entry (eh_dir); |
| 2420 | hh_ind = metag_elf_hash_entry (eh_ind); |
| 2421 | |
| 2422 | if (hh_ind->dyn_relocs != NULL) |
| 2423 | { |
| 2424 | if (hh_dir->dyn_relocs != NULL) |
| 2425 | { |
| 2426 | struct elf_metag_dyn_reloc_entry **hdh_pp; |
| 2427 | struct elf_metag_dyn_reloc_entry *hdh_p; |
| 2428 | |
| 2429 | if (eh_ind->root.type == bfd_link_hash_indirect) |
| 2430 | abort (); |
| 2431 | |
| 2432 | /* Add reloc counts against the weak sym to the strong sym |
| 2433 | list. Merge any entries against the same section. */ |
| 2434 | for (hdh_pp = &hh_ind->dyn_relocs; (hdh_p = *hdh_pp) != NULL; ) |
| 2435 | { |
| 2436 | struct elf_metag_dyn_reloc_entry *hdh_q; |
| 2437 | |
| 2438 | for (hdh_q = hh_dir->dyn_relocs; hdh_q != NULL; |
| 2439 | hdh_q = hdh_q->hdh_next) |
| 2440 | if (hdh_q->sec == hdh_p->sec) |
| 2441 | { |
| 2442 | hdh_q->relative_count += hdh_p->relative_count; |
| 2443 | hdh_q->count += hdh_p->count; |
| 2444 | *hdh_pp = hdh_p->hdh_next; |
| 2445 | break; |
| 2446 | } |
| 2447 | if (hdh_q == NULL) |
| 2448 | hdh_pp = &hdh_p->hdh_next; |
| 2449 | } |
| 2450 | *hdh_pp = hh_dir->dyn_relocs; |
| 2451 | } |
| 2452 | |
| 2453 | hh_dir->dyn_relocs = hh_ind->dyn_relocs; |
| 2454 | hh_ind->dyn_relocs = NULL; |
| 2455 | } |
| 2456 | |
| 2457 | if (eh_ind->root.type == bfd_link_hash_indirect |
| 2458 | && eh_dir->got.refcount <= 0) |
| 2459 | { |
| 2460 | hh_dir->tls_type = hh_ind->tls_type; |
| 2461 | hh_ind->tls_type = GOT_UNKNOWN; |
| 2462 | } |
| 2463 | |
| 2464 | _bfd_elf_link_hash_copy_indirect (info, eh_dir, eh_ind); |
| 2465 | } |
| 2466 | |
| 2467 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 2468 | regular object. The current definition is in some section of the |
| 2469 | dynamic object, but we're not including those sections. We have to |
| 2470 | change the definition to something the rest of the link can |
| 2471 | understand. */ |
| 2472 | |
| 2473 | static bfd_boolean |
| 2474 | elf_metag_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 2475 | struct elf_link_hash_entry *eh) |
| 2476 | { |
| 2477 | struct elf_metag_link_hash_table *htab; |
| 2478 | struct elf_metag_link_hash_entry *hh; |
| 2479 | struct elf_metag_dyn_reloc_entry *hdh_p; |
| 2480 | asection *s; |
| 2481 | |
| 2482 | /* If this is a function, put it in the procedure linkage table. We |
| 2483 | will fill in the contents of the procedure linkage table later, |
| 2484 | when we know the address of the .got section. */ |
| 2485 | if (eh->type == STT_FUNC |
| 2486 | || eh->needs_plt) |
| 2487 | { |
| 2488 | if (eh->plt.refcount <= 0 |
| 2489 | || SYMBOL_CALLS_LOCAL (info, eh) |
| 2490 | || (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT |
| 2491 | && eh->root.type == bfd_link_hash_undefweak)) |
| 2492 | { |
| 2493 | /* This case can occur if we saw a PLT reloc in an input |
| 2494 | file, but the symbol was never referred to by a dynamic |
| 2495 | object. In such a case, we don't actually need to build |
| 2496 | a procedure linkage table, and we can just do a PCREL |
| 2497 | reloc instead. */ |
| 2498 | eh->plt.offset = (bfd_vma) -1; |
| 2499 | eh->needs_plt = 0; |
| 2500 | } |
| 2501 | |
| 2502 | return TRUE; |
| 2503 | } |
| 2504 | else |
| 2505 | eh->plt.offset = (bfd_vma) -1; |
| 2506 | |
| 2507 | /* If this is a weak symbol, and there is a real definition, the |
| 2508 | processor independent code will have arranged for us to see the |
| 2509 | real definition first, and we can just use the same value. */ |
| 2510 | if (eh->u.weakdef != NULL) |
| 2511 | { |
| 2512 | if (eh->u.weakdef->root.type != bfd_link_hash_defined |
| 2513 | && eh->u.weakdef->root.type != bfd_link_hash_defweak) |
| 2514 | abort (); |
| 2515 | eh->root.u.def.section = eh->u.weakdef->root.u.def.section; |
| 2516 | eh->root.u.def.value = eh->u.weakdef->root.u.def.value; |
| 2517 | eh->non_got_ref = eh->u.weakdef->non_got_ref; |
| 2518 | return TRUE; |
| 2519 | } |
| 2520 | |
| 2521 | /* This is a reference to a symbol defined by a dynamic object which |
| 2522 | is not a function. */ |
| 2523 | |
| 2524 | /* If we are creating a shared library, we must presume that the |
| 2525 | only references to the symbol are via the global offset table. |
| 2526 | For such cases we need not do anything here; the relocations will |
| 2527 | be handled correctly by relocate_section. */ |
| 2528 | if (info->shared) |
| 2529 | return TRUE; |
| 2530 | |
| 2531 | /* If there are no references to this symbol that do not use the |
| 2532 | GOT, we don't need to generate a copy reloc. */ |
| 2533 | if (!eh->non_got_ref) |
| 2534 | return TRUE; |
| 2535 | |
| 2536 | /* If -z nocopyreloc was given, we won't generate them either. */ |
| 2537 | if (info->nocopyreloc) |
| 2538 | { |
| 2539 | eh->non_got_ref = 0; |
| 2540 | return TRUE; |
| 2541 | } |
| 2542 | |
| 2543 | hh = (struct elf_metag_link_hash_entry *) eh; |
| 2544 | for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next) |
| 2545 | { |
| 2546 | s = hdh_p->sec->output_section; |
| 2547 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 2548 | break; |
| 2549 | } |
| 2550 | |
| 2551 | /* If we didn't find any dynamic relocs in read-only sections, then |
| 2552 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| 2553 | if (hdh_p == NULL) |
| 2554 | { |
| 2555 | eh->non_got_ref = 0; |
| 2556 | return TRUE; |
| 2557 | } |
| 2558 | |
| 2559 | /* We must allocate the symbol in our .dynbss section, which will |
| 2560 | become part of the .bss section of the executable. There will be |
| 2561 | an entry for this symbol in the .dynsym section. The dynamic |
| 2562 | object will contain position independent code, so all references |
| 2563 | from the dynamic object to this symbol will go through the global |
| 2564 | offset table. The dynamic linker will use the .dynsym entry to |
| 2565 | determine the address it must put in the global offset table, so |
| 2566 | both the dynamic object and the regular object will refer to the |
| 2567 | same memory location for the variable. */ |
| 2568 | |
| 2569 | htab = metag_link_hash_table (info); |
| 2570 | |
| 2571 | /* We must generate a COPY reloc to tell the dynamic linker to |
| 2572 | copy the initial value out of the dynamic object and into the |
| 2573 | runtime process image. */ |
| 2574 | if ((eh->root.u.def.section->flags & SEC_ALLOC) != 0 && eh->size != 0) |
| 2575 | { |
| 2576 | htab->srelbss->size += sizeof (Elf32_External_Rela); |
| 2577 | eh->needs_copy = 1; |
| 2578 | } |
| 2579 | |
| 2580 | s = htab->sdynbss; |
| 2581 | |
| 2582 | return _bfd_elf_adjust_dynamic_copy (eh, s); |
| 2583 | } |
| 2584 | |
| 2585 | /* Allocate space in .plt, .got and associated reloc sections for |
| 2586 | global syms. */ |
| 2587 | |
| 2588 | static bfd_boolean |
| 2589 | allocate_dynrelocs (struct elf_link_hash_entry *eh, void *inf) |
| 2590 | { |
| 2591 | struct bfd_link_info *info; |
| 2592 | struct elf_metag_link_hash_table *htab; |
| 2593 | struct elf_metag_link_hash_entry *hh; |
| 2594 | struct elf_metag_dyn_reloc_entry *hdh_p; |
| 2595 | |
| 2596 | if (eh->root.type == bfd_link_hash_indirect) |
| 2597 | return TRUE; |
| 2598 | |
| 2599 | if (eh->root.type == bfd_link_hash_warning) |
| 2600 | eh = (struct elf_link_hash_entry *) eh->root.u.i.link; |
| 2601 | |
| 2602 | info = inf; |
| 2603 | htab = metag_link_hash_table (info); |
| 2604 | |
| 2605 | if (htab->etab.dynamic_sections_created |
| 2606 | && eh->plt.refcount > 0) |
| 2607 | { |
| 2608 | /* Make sure this symbol is output as a dynamic symbol. |
| 2609 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2610 | if (eh->dynindx == -1 |
| 2611 | && !eh->forced_local) |
| 2612 | { |
| 2613 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) |
| 2614 | return FALSE; |
| 2615 | } |
| 2616 | |
| 2617 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, eh)) |
| 2618 | { |
| 2619 | asection *s = htab->splt; |
| 2620 | |
| 2621 | /* If this is the first .plt entry, make room for the special |
| 2622 | first entry. */ |
| 2623 | if (s->size == 0) |
| 2624 | s->size += PLT_ENTRY_SIZE; |
| 2625 | |
| 2626 | eh->plt.offset = s->size; |
| 2627 | |
| 2628 | /* If this symbol is not defined in a regular file, and we are |
| 2629 | not generating a shared library, then set the symbol to this |
| 2630 | location in the .plt. This is required to make function |
| 2631 | pointers compare as equal between the normal executable and |
| 2632 | the shared library. */ |
| 2633 | if (! info->shared |
| 2634 | && !eh->def_regular) |
| 2635 | { |
| 2636 | eh->root.u.def.section = s; |
| 2637 | eh->root.u.def.value = eh->plt.offset; |
| 2638 | } |
| 2639 | |
| 2640 | /* Make room for this entry. */ |
| 2641 | s->size += PLT_ENTRY_SIZE; |
| 2642 | |
| 2643 | /* We also need to make an entry in the .got.plt section, which |
| 2644 | will be placed in the .got section by the linker script. */ |
| 2645 | htab->sgotplt->size += 4; |
| 2646 | |
| 2647 | /* We also need to make an entry in the .rel.plt section. */ |
| 2648 | htab->srelplt->size += sizeof (Elf32_External_Rela); |
| 2649 | } |
| 2650 | else |
| 2651 | { |
| 2652 | eh->plt.offset = (bfd_vma) -1; |
| 2653 | eh->needs_plt = 0; |
| 2654 | } |
| 2655 | } |
| 2656 | else |
| 2657 | { |
| 2658 | eh->plt.offset = (bfd_vma) -1; |
| 2659 | eh->needs_plt = 0; |
| 2660 | } |
| 2661 | |
| 2662 | if (eh->got.refcount > 0) |
| 2663 | { |
| 2664 | asection *s; |
| 2665 | bfd_boolean dyn; |
| 2666 | int tls_type = metag_elf_hash_entry (eh)->tls_type; |
| 2667 | |
| 2668 | /* Make sure this symbol is output as a dynamic symbol. |
| 2669 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2670 | if (eh->dynindx == -1 |
| 2671 | && !eh->forced_local) |
| 2672 | { |
| 2673 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) |
| 2674 | return FALSE; |
| 2675 | } |
| 2676 | |
| 2677 | s = htab->sgot; |
| 2678 | |
| 2679 | eh->got.offset = s->size; |
| 2680 | s->size += 4; |
| 2681 | /* R_METAG_TLS_GD needs 2 consecutive GOT slots. */ |
| 2682 | if (tls_type == GOT_TLS_GD) |
| 2683 | s->size += 4; |
| 2684 | dyn = htab->etab.dynamic_sections_created; |
| 2685 | /* R_METAG_TLS_IE needs one dynamic relocation if dynamic, |
| 2686 | R_METAG_TLS_GD needs one if local symbol and two if global. */ |
| 2687 | if ((tls_type == GOT_TLS_GD && eh->dynindx == -1) |
| 2688 | || (tls_type == GOT_TLS_IE && dyn)) |
| 2689 | htab->srelgot->size += sizeof (Elf32_External_Rela); |
| 2690 | else if (tls_type == GOT_TLS_GD) |
| 2691 | htab->srelgot->size += 2 * sizeof (Elf32_External_Rela); |
| 2692 | else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, eh)) |
| 2693 | htab->srelgot->size += sizeof (Elf32_External_Rela); |
| 2694 | } |
| 2695 | else |
| 2696 | eh->got.offset = (bfd_vma) -1; |
| 2697 | |
| 2698 | hh = (struct elf_metag_link_hash_entry *) eh; |
| 2699 | if (hh->dyn_relocs == NULL) |
| 2700 | return TRUE; |
| 2701 | |
| 2702 | /* If this is a -Bsymbolic shared link, then we need to discard all |
| 2703 | space allocated for dynamic pc-relative relocs against symbols |
| 2704 | defined in a regular object. For the normal shared case, discard |
| 2705 | space for relocs that have become local due to symbol visibility |
| 2706 | changes. */ |
| 2707 | if (info->shared) |
| 2708 | { |
| 2709 | if (SYMBOL_CALLS_LOCAL (info, eh)) |
| 2710 | { |
| 2711 | struct elf_metag_dyn_reloc_entry **hdh_pp; |
| 2712 | |
| 2713 | for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; ) |
| 2714 | { |
| 2715 | hdh_p->count -= hdh_p->relative_count; |
| 2716 | hdh_p->relative_count = 0; |
| 2717 | if (hdh_p->count == 0) |
| 2718 | *hdh_pp = hdh_p->hdh_next; |
| 2719 | else |
| 2720 | hdh_pp = &hdh_p->hdh_next; |
| 2721 | } |
| 2722 | } |
| 2723 | |
| 2724 | /* Also discard relocs on undefined weak syms with non-default |
| 2725 | visibility. */ |
| 2726 | if (hh->dyn_relocs != NULL |
| 2727 | && eh->root.type == bfd_link_hash_undefweak) |
| 2728 | { |
| 2729 | if (ELF_ST_VISIBILITY (eh->other) != STV_DEFAULT) |
| 2730 | hh->dyn_relocs = NULL; |
| 2731 | |
| 2732 | /* Make sure undefined weak symbols are output as a dynamic |
| 2733 | symbol in PIEs. */ |
| 2734 | else if (eh->dynindx == -1 |
| 2735 | && !eh->forced_local) |
| 2736 | { |
| 2737 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) |
| 2738 | return FALSE; |
| 2739 | } |
| 2740 | } |
| 2741 | } |
| 2742 | else |
| 2743 | { |
| 2744 | /* For the non-shared case, discard space for relocs against |
| 2745 | symbols which turn out to need copy relocs or are not |
| 2746 | dynamic. */ |
| 2747 | if (!eh->non_got_ref |
| 2748 | && ((eh->def_dynamic |
| 2749 | && !eh->def_regular) |
| 2750 | || (htab->etab.dynamic_sections_created |
| 2751 | && (eh->root.type == bfd_link_hash_undefweak |
| 2752 | || eh->root.type == bfd_link_hash_undefined)))) |
| 2753 | { |
| 2754 | /* Make sure this symbol is output as a dynamic symbol. |
| 2755 | Undefined weak syms won't yet be marked as dynamic. */ |
| 2756 | if (eh->dynindx == -1 |
| 2757 | && !eh->forced_local) |
| 2758 | { |
| 2759 | if (! bfd_elf_link_record_dynamic_symbol (info, eh)) |
| 2760 | return FALSE; |
| 2761 | } |
| 2762 | |
| 2763 | /* If that succeeded, we know we'll be keeping all the |
| 2764 | relocs. */ |
| 2765 | if (eh->dynindx != -1) |
| 2766 | goto keep; |
| 2767 | } |
| 2768 | |
| 2769 | hh->dyn_relocs = NULL; |
| 2770 | return TRUE; |
| 2771 | |
| 2772 | keep: ; |
| 2773 | } |
| 2774 | |
| 2775 | /* Finally, allocate space. */ |
| 2776 | for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next) |
| 2777 | { |
| 2778 | asection *sreloc = elf_section_data (hdh_p->sec)->sreloc; |
| 2779 | sreloc->size += hdh_p->count * sizeof (Elf32_External_Rela); |
| 2780 | } |
| 2781 | |
| 2782 | return TRUE; |
| 2783 | } |
| 2784 | |
| 2785 | /* Find any dynamic relocs that apply to read-only sections. */ |
| 2786 | |
| 2787 | static bfd_boolean |
| 2788 | readonly_dynrelocs (struct elf_link_hash_entry *eh, void *inf) |
| 2789 | { |
| 2790 | struct elf_metag_link_hash_entry *hh; |
| 2791 | struct elf_metag_dyn_reloc_entry *hdh_p; |
| 2792 | |
| 2793 | if (eh->root.type == bfd_link_hash_warning) |
| 2794 | eh = (struct elf_link_hash_entry *) eh->root.u.i.link; |
| 2795 | |
| 2796 | hh = (struct elf_metag_link_hash_entry *) eh; |
| 2797 | for (hdh_p = hh->dyn_relocs; hdh_p != NULL; hdh_p = hdh_p->hdh_next) |
| 2798 | { |
| 2799 | asection *s = hdh_p->sec->output_section; |
| 2800 | |
| 2801 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 2802 | { |
| 2803 | struct bfd_link_info *info = inf; |
| 2804 | |
| 2805 | info->flags |= DF_TEXTREL; |
| 2806 | |
| 2807 | /* Not an error, just cut short the traversal. */ |
| 2808 | return FALSE; |
| 2809 | } |
| 2810 | } |
| 2811 | return TRUE; |
| 2812 | } |
| 2813 | |
| 2814 | /* Set the sizes of the dynamic sections. */ |
| 2815 | |
| 2816 | static bfd_boolean |
| 2817 | elf_metag_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 2818 | struct bfd_link_info *info) |
| 2819 | { |
| 2820 | struct elf_metag_link_hash_table *htab; |
| 2821 | bfd *dynobj; |
| 2822 | bfd *ibfd; |
| 2823 | asection *s; |
| 2824 | bfd_boolean relocs; |
| 2825 | |
| 2826 | htab = metag_link_hash_table (info); |
| 2827 | dynobj = htab->etab.dynobj; |
| 2828 | if (dynobj == NULL) |
| 2829 | abort (); |
| 2830 | |
| 2831 | if (htab->etab.dynamic_sections_created) |
| 2832 | { |
| 2833 | /* Set the contents of the .interp section to the interpreter. */ |
| 2834 | if (info->executable) |
| 2835 | { |
| 2836 | s = bfd_get_linker_section (dynobj, ".interp"); |
| 2837 | if (s == NULL) |
| 2838 | abort (); |
| 2839 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 2840 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 2841 | } |
| 2842 | } |
| 2843 | |
| 2844 | /* Set up .got offsets for local syms, and space for local dynamic |
| 2845 | relocs. */ |
| 2846 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| 2847 | { |
| 2848 | bfd_signed_vma *local_got; |
| 2849 | bfd_signed_vma *end_local_got; |
| 2850 | bfd_size_type locsymcount; |
| 2851 | Elf_Internal_Shdr *symtab_hdr; |
| 2852 | asection *srel; |
| 2853 | char *local_tls_type; |
| 2854 | |
| 2855 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 2856 | continue; |
| 2857 | |
| 2858 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 2859 | { |
| 2860 | struct elf_metag_dyn_reloc_entry *hdh_p; |
| 2861 | |
| 2862 | for (hdh_p = ((struct elf_metag_dyn_reloc_entry *) |
| 2863 | elf_section_data (s)->local_dynrel); |
| 2864 | hdh_p != NULL; |
| 2865 | hdh_p = hdh_p->hdh_next) |
| 2866 | { |
| 2867 | if (!bfd_is_abs_section (hdh_p->sec) |
| 2868 | && bfd_is_abs_section (hdh_p->sec->output_section)) |
| 2869 | { |
| 2870 | /* Input section has been discarded, either because |
| 2871 | it is a copy of a linkonce section or due to |
| 2872 | linker script /DISCARD/, so we'll be discarding |
| 2873 | the relocs too. */ |
| 2874 | } |
| 2875 | else if (hdh_p->count != 0) |
| 2876 | { |
| 2877 | srel = elf_section_data (hdh_p->sec)->sreloc; |
| 2878 | srel->size += hdh_p->count * sizeof (Elf32_External_Rela); |
| 2879 | if ((hdh_p->sec->output_section->flags & SEC_READONLY) != 0) |
| 2880 | info->flags |= DF_TEXTREL; |
| 2881 | } |
| 2882 | } |
| 2883 | } |
| 2884 | |
| 2885 | local_got = elf_local_got_refcounts (ibfd); |
| 2886 | if (!local_got) |
| 2887 | continue; |
| 2888 | |
| 2889 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 2890 | locsymcount = symtab_hdr->sh_info; |
| 2891 | end_local_got = local_got + locsymcount; |
| 2892 | local_tls_type = metag_elf_local_got_tls_type (ibfd); |
| 2893 | s = htab->sgot; |
| 2894 | srel = htab->srelgot; |
| 2895 | for (; local_got < end_local_got; ++local_got) |
| 2896 | { |
| 2897 | if (*local_got > 0) |
| 2898 | { |
| 2899 | *local_got = s->size; |
| 2900 | s->size += GOT_ENTRY_SIZE; |
| 2901 | /* R_METAG_TLS_GD relocs need 2 consecutive GOT entries. */ |
| 2902 | if (*local_tls_type == GOT_TLS_GD) |
| 2903 | s->size += 4; |
| 2904 | if (info->shared) |
| 2905 | srel->size += sizeof (Elf32_External_Rela); |
| 2906 | } |
| 2907 | else |
| 2908 | *local_got = (bfd_vma) -1; |
| 2909 | ++local_tls_type; |
| 2910 | } |
| 2911 | } |
| 2912 | |
| 2913 | if (htab->tls_ldm_got.refcount > 0) |
| 2914 | { |
| 2915 | /* Allocate 2 got entries and 1 dynamic reloc for R_METAG_TLS_LDM |
| 2916 | reloc. */ |
| 2917 | htab->tls_ldm_got.offset = htab->sgot->size; |
| 2918 | htab->sgot->size += 8; |
| 2919 | htab->srelgot->size += sizeof (Elf32_External_Rela); |
| 2920 | } |
| 2921 | else |
| 2922 | htab->tls_ldm_got.offset = -1; |
| 2923 | |
| 2924 | /* Allocate global sym .plt and .got entries, and space for global |
| 2925 | sym dynamic relocs. */ |
| 2926 | elf_link_hash_traverse (&htab->etab, allocate_dynrelocs, info); |
| 2927 | |
| 2928 | /* We now have determined the sizes of the various dynamic sections. |
| 2929 | Allocate memory for them. */ |
| 2930 | relocs = FALSE; |
| 2931 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 2932 | { |
| 2933 | bfd_boolean reloc_section = FALSE; |
| 2934 | |
| 2935 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 2936 | continue; |
| 2937 | |
| 2938 | if (s == htab->splt |
| 2939 | || s == htab->sgot |
| 2940 | || s == htab->sgotplt |
| 2941 | || s == htab->sdynbss) |
| 2942 | { |
| 2943 | /* Strip this section if we don't need it; see the |
| 2944 | comment below. */ |
| 2945 | } |
| 2946 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
| 2947 | { |
| 2948 | if (s->size != 0 && s != htab->srelplt) |
| 2949 | relocs = TRUE; |
| 2950 | |
| 2951 | /* We use the reloc_count field as a counter if we need |
| 2952 | to copy relocs into the output file. */ |
| 2953 | s->reloc_count = 0; |
| 2954 | reloc_section = TRUE; |
| 2955 | } |
| 2956 | else |
| 2957 | { |
| 2958 | /* It's not one of our sections, so don't allocate space. */ |
| 2959 | continue; |
| 2960 | } |
| 2961 | |
| 2962 | if (s->size == 0) |
| 2963 | { |
| 2964 | /* If we don't need this section, strip it from the |
| 2965 | output file. This is mostly to handle .rela.bss and |
| 2966 | .rela.plt. We must create both sections in |
| 2967 | create_dynamic_sections, because they must be created |
| 2968 | before the linker maps input sections to output |
| 2969 | sections. The linker does that before |
| 2970 | adjust_dynamic_symbol is called, and it is that |
| 2971 | function which decides whether anything needs to go |
| 2972 | into these sections. */ |
| 2973 | s->flags |= SEC_EXCLUDE; |
| 2974 | continue; |
| 2975 | } |
| 2976 | |
| 2977 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 2978 | continue; |
| 2979 | |
| 2980 | /* Allocate memory for the section contents. */ |
| 2981 | s->contents = bfd_zalloc (dynobj, s->size); |
| 2982 | if (s->contents == NULL) |
| 2983 | return FALSE; |
| 2984 | else if (reloc_section) |
| 2985 | { |
| 2986 | unsigned char *contents = s->contents; |
| 2987 | Elf32_External_Rela reloc; |
| 2988 | |
| 2989 | /* Fill the reloc section with a R_METAG_NONE type reloc. */ |
| 2990 | memset(&reloc, 0, sizeof(Elf32_External_Rela)); |
| 2991 | reloc.r_info[0] = R_METAG_NONE; |
| 2992 | for (; contents < (s->contents + s->size); |
| 2993 | contents += sizeof(Elf32_External_Rela)) |
| 2994 | { |
| 2995 | memcpy(contents, &reloc, sizeof(Elf32_External_Rela)); |
| 2996 | } |
| 2997 | } |
| 2998 | } |
| 2999 | |
| 3000 | if (htab->etab.dynamic_sections_created) |
| 3001 | { |
| 3002 | /* Add some entries to the .dynamic section. We fill in the |
| 3003 | values later, in elf_metag_finish_dynamic_sections, but we |
| 3004 | must add the entries now so that we get the correct size for |
| 3005 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 3006 | dynamic linker and used by the debugger. */ |
| 3007 | #define add_dynamic_entry(TAG, VAL) \ |
| 3008 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 3009 | |
| 3010 | if (!add_dynamic_entry (DT_PLTGOT, 0)) |
| 3011 | return FALSE; |
| 3012 | |
| 3013 | if (info->executable) |
| 3014 | { |
| 3015 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 3016 | return FALSE; |
| 3017 | } |
| 3018 | |
| 3019 | if (htab->srelplt->size != 0) |
| 3020 | { |
| 3021 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) |
| 3022 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 3023 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 3024 | return FALSE; |
| 3025 | } |
| 3026 | |
| 3027 | if (relocs) |
| 3028 | { |
| 3029 | if (!add_dynamic_entry (DT_RELA, 0) |
| 3030 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 3031 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 3032 | return FALSE; |
| 3033 | |
| 3034 | /* If any dynamic relocs apply to a read-only section, |
| 3035 | then we need a DT_TEXTREL entry. */ |
| 3036 | if ((info->flags & DF_TEXTREL) == 0) |
| 3037 | elf_link_hash_traverse (&htab->etab, readonly_dynrelocs, info); |
| 3038 | |
| 3039 | if ((info->flags & DF_TEXTREL) != 0) |
| 3040 | { |
| 3041 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 3042 | return FALSE; |
| 3043 | } |
| 3044 | } |
| 3045 | } |
| 3046 | #undef add_dynamic_entry |
| 3047 | |
| 3048 | return TRUE; |
| 3049 | } |
| 3050 | |
| 3051 | /* Finish up dynamic symbol handling. We set the contents of various |
| 3052 | dynamic sections here. */ |
| 3053 | |
| 3054 | static bfd_boolean |
| 3055 | elf_metag_finish_dynamic_symbol (bfd *output_bfd, |
| 3056 | struct bfd_link_info *info, |
| 3057 | struct elf_link_hash_entry *eh, |
| 3058 | Elf_Internal_Sym *sym) |
| 3059 | { |
| 3060 | struct elf_metag_link_hash_table *htab; |
| 3061 | Elf_Internal_Rela rel; |
| 3062 | bfd_byte *loc; |
| 3063 | |
| 3064 | htab = metag_link_hash_table (info); |
| 3065 | |
| 3066 | if (eh->plt.offset != (bfd_vma) -1) |
| 3067 | { |
| 3068 | asection *splt; |
| 3069 | asection *sgot; |
| 3070 | asection *srela; |
| 3071 | |
| 3072 | bfd_vma plt_index; |
| 3073 | bfd_vma got_offset; |
| 3074 | bfd_vma got_entry; |
| 3075 | |
| 3076 | if (eh->plt.offset & 1) |
| 3077 | abort (); |
| 3078 | |
| 3079 | BFD_ASSERT (eh->dynindx != -1); |
| 3080 | |
| 3081 | splt = htab->splt; |
| 3082 | sgot = htab->sgotplt; |
| 3083 | srela = htab->srelplt; |
| 3084 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); |
| 3085 | |
| 3086 | /* Get the index in the procedure linkage table which |
| 3087 | corresponds to this symbol. This is the index of this symbol |
| 3088 | in all the symbols for which we are making plt entries. The |
| 3089 | first entry in the procedure linkage table is reserved. */ |
| 3090 | plt_index = eh->plt.offset / PLT_ENTRY_SIZE - 1; |
| 3091 | |
| 3092 | /* Get the offset into the .got.plt table of the entry that |
| 3093 | corresponds to this function. */ |
| 3094 | got_offset = plt_index * GOT_ENTRY_SIZE; |
| 3095 | |
| 3096 | BFD_ASSERT (got_offset < (1 << 16)); |
| 3097 | |
| 3098 | got_entry = sgot->output_section->vma |
| 3099 | + sgot->output_offset |
| 3100 | + got_offset; |
| 3101 | |
| 3102 | BFD_ASSERT (plt_index < (1 << 16)); |
| 3103 | |
| 3104 | /* Fill in the entry in the procedure linkage table. */ |
| 3105 | if (! info->shared) |
| 3106 | { |
| 3107 | bfd_put_32 (output_bfd, |
| 3108 | (plt_entry[0] |
| 3109 | | (((got_entry >> 16) & 0xffff) << 3)), |
| 3110 | splt->contents + eh->plt.offset); |
| 3111 | bfd_put_32 (output_bfd, |
| 3112 | (plt_entry[1] |
| 3113 | | ((got_entry & 0xffff) << 3)), |
| 3114 | splt->contents + eh->plt.offset + 4); |
| 3115 | bfd_put_32 (output_bfd, plt_entry[2], |
| 3116 | splt->contents + eh->plt.offset + 8); |
| 3117 | bfd_put_32 (output_bfd, |
| 3118 | (plt_entry[3] | (plt_index << 3)), |
| 3119 | splt->contents + eh->plt.offset + 12); |
| 3120 | bfd_put_32 (output_bfd, |
| 3121 | (plt_entry[4] |
| 3122 | | ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)), |
| 3123 | splt->contents + eh->plt.offset + 16); |
| 3124 | } |
| 3125 | else |
| 3126 | { |
| 3127 | bfd_vma addr = got_entry - (splt->output_section->vma + |
| 3128 | splt->output_offset + eh->plt.offset); |
| 3129 | |
| 3130 | bfd_put_32 (output_bfd, |
| 3131 | plt_pic_entry[0] | (((addr >> 16) & 0xffff) << 3), |
| 3132 | splt->contents + eh->plt.offset); |
| 3133 | bfd_put_32 (output_bfd, |
| 3134 | plt_pic_entry[1] | ((addr & 0xffff) << 3), |
| 3135 | splt->contents + eh->plt.offset + 4); |
| 3136 | bfd_put_32 (output_bfd, plt_pic_entry[2], |
| 3137 | splt->contents + eh->plt.offset + 8); |
| 3138 | bfd_put_32 (output_bfd, |
| 3139 | (plt_pic_entry[3] | (plt_index << 3)), |
| 3140 | splt->contents + eh->plt.offset + 12); |
| 3141 | bfd_put_32 (output_bfd, |
| 3142 | (plt_pic_entry[4] |
| 3143 | + ((((unsigned int) ((- (eh->plt.offset + 16)) >> 2)) & 0x7ffff) << 5)), |
| 3144 | splt->contents + eh->plt.offset + 16); |
| 3145 | } |
| 3146 | |
| 3147 | /* Fill in the entry in the global offset table. */ |
| 3148 | bfd_put_32 (output_bfd, |
| 3149 | (splt->output_section->vma |
| 3150 | + splt->output_offset |
| 3151 | + eh->plt.offset |
| 3152 | + 12), /* offset within PLT entry */ |
| 3153 | sgot->contents + got_offset); |
| 3154 | |
| 3155 | /* Fill in the entry in the .rela.plt section. */ |
| 3156 | rel.r_offset = (sgot->output_section->vma |
| 3157 | + sgot->output_offset |
| 3158 | + got_offset); |
| 3159 | rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_JMP_SLOT); |
| 3160 | rel.r_addend = 0; |
| 3161 | loc = htab->srelplt->contents; |
| 3162 | loc += plt_index * sizeof(Elf32_External_Rela); |
| 3163 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 3164 | |
| 3165 | if (!eh->def_regular) |
| 3166 | { |
| 3167 | /* Mark the symbol as undefined, rather than as defined in |
| 3168 | the .plt section. Leave the value alone. */ |
| 3169 | sym->st_shndx = SHN_UNDEF; |
| 3170 | } |
| 3171 | } |
| 3172 | |
| 3173 | if (eh->got.offset != (bfd_vma) -1 |
| 3174 | && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_GD) == 0 |
| 3175 | && (metag_elf_hash_entry (eh)->tls_type & GOT_TLS_IE) == 0) |
| 3176 | { |
| 3177 | /* This symbol has an entry in the global offset table. Set it |
| 3178 | up. */ |
| 3179 | |
| 3180 | rel.r_offset = ((eh->got.offset &~ (bfd_vma) 1) |
| 3181 | + htab->sgot->output_offset |
| 3182 | + htab->sgot->output_section->vma); |
| 3183 | |
| 3184 | /* If this is a -Bsymbolic link and the symbol is defined |
| 3185 | locally or was forced to be local because of a version file, |
| 3186 | we just want to emit a RELATIVE reloc. The entry in the |
| 3187 | global offset table will already have been initialized in the |
| 3188 | relocate_section function. */ |
| 3189 | if (info->shared |
| 3190 | && (info->symbolic || eh->dynindx == -1) |
| 3191 | && eh->def_regular) |
| 3192 | { |
| 3193 | rel.r_info = ELF32_R_INFO (0, R_METAG_RELATIVE); |
| 3194 | rel.r_addend = (eh->root.u.def.value |
| 3195 | + eh->root.u.def.section->output_offset |
| 3196 | + eh->root.u.def.section->output_section->vma); |
| 3197 | } |
| 3198 | else |
| 3199 | { |
| 3200 | if ((eh->got.offset & 1) != 0) |
| 3201 | abort (); |
| 3202 | bfd_put_32 (output_bfd, 0, htab->sgot->contents + eh->got.offset); |
| 3203 | rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_GLOB_DAT); |
| 3204 | rel.r_addend = 0; |
| 3205 | } |
| 3206 | |
| 3207 | loc = htab->srelgot->contents; |
| 3208 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3209 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 3210 | } |
| 3211 | |
| 3212 | if (eh->needs_copy) |
| 3213 | { |
| 3214 | asection *s; |
| 3215 | |
| 3216 | /* This symbol needs a copy reloc. Set it up. */ |
| 3217 | |
| 3218 | if (! (eh->dynindx != -1 |
| 3219 | && (eh->root.type == bfd_link_hash_defined |
| 3220 | || eh->root.type == bfd_link_hash_defweak))) |
| 3221 | abort (); |
| 3222 | |
| 3223 | s = htab->srelbss; |
| 3224 | |
| 3225 | rel.r_offset = (eh->root.u.def.value |
| 3226 | + eh->root.u.def.section->output_offset |
| 3227 | + eh->root.u.def.section->output_section->vma); |
| 3228 | rel.r_addend = 0; |
| 3229 | rel.r_info = ELF32_R_INFO (eh->dynindx, R_METAG_COPY); |
| 3230 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3231 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 3232 | } |
| 3233 | |
| 3234 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 3235 | if (eh->root.root.string[0] == '_' |
| 3236 | && (strcmp (eh->root.root.string, "_DYNAMIC") == 0 |
| 3237 | || eh == htab->etab.hgot)) |
| 3238 | { |
| 3239 | sym->st_shndx = SHN_ABS; |
| 3240 | } |
| 3241 | |
| 3242 | return TRUE; |
| 3243 | } |
| 3244 | |
| 3245 | /* Set the Meta ELF ABI version. */ |
| 3246 | |
| 3247 | static void |
| 3248 | elf_metag_post_process_headers (bfd * abfd, struct bfd_link_info * link_info ATTRIBUTE_UNUSED) |
| 3249 | { |
| 3250 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
| 3251 | |
| 3252 | i_ehdrp = elf_elfheader (abfd); |
| 3253 | i_ehdrp->e_ident[EI_ABIVERSION] = METAG_ELF_ABI_VERSION; |
| 3254 | } |
| 3255 | |
| 3256 | /* Used to decide how to sort relocs in an optimal manner for the |
| 3257 | dynamic linker, before writing them out. */ |
| 3258 | |
| 3259 | static enum elf_reloc_type_class |
| 3260 | elf_metag_reloc_type_class (const Elf_Internal_Rela *rela) |
| 3261 | { |
| 3262 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 3263 | { |
| 3264 | case R_METAG_RELATIVE: |
| 3265 | return reloc_class_relative; |
| 3266 | case R_METAG_JMP_SLOT: |
| 3267 | return reloc_class_plt; |
| 3268 | case R_METAG_COPY: |
| 3269 | return reloc_class_copy; |
| 3270 | default: |
| 3271 | return reloc_class_normal; |
| 3272 | } |
| 3273 | } |
| 3274 | |
| 3275 | /* Finish up the dynamic sections. */ |
| 3276 | |
| 3277 | static bfd_boolean |
| 3278 | elf_metag_finish_dynamic_sections (bfd *output_bfd, |
| 3279 | struct bfd_link_info *info) |
| 3280 | { |
| 3281 | bfd *dynobj; |
| 3282 | struct elf_metag_link_hash_table *htab; |
| 3283 | asection *sdyn; |
| 3284 | |
| 3285 | htab = metag_link_hash_table (info); |
| 3286 | dynobj = htab->etab.dynobj; |
| 3287 | |
| 3288 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| 3289 | |
| 3290 | if (htab->etab.dynamic_sections_created) |
| 3291 | { |
| 3292 | asection *splt; |
| 3293 | Elf32_External_Dyn *dyncon, *dynconend; |
| 3294 | |
| 3295 | if (sdyn == NULL) |
| 3296 | abort (); |
| 3297 | |
| 3298 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 3299 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 3300 | for (; dyncon < dynconend; dyncon++) |
| 3301 | { |
| 3302 | Elf_Internal_Dyn dyn; |
| 3303 | asection *s; |
| 3304 | |
| 3305 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 3306 | |
| 3307 | switch (dyn.d_tag) |
| 3308 | { |
| 3309 | default: |
| 3310 | continue; |
| 3311 | |
| 3312 | case DT_PLTGOT: |
| 3313 | s = htab->sgot->output_section; |
| 3314 | BFD_ASSERT (s != NULL); |
| 3315 | dyn.d_un.d_ptr = s->vma + htab->sgot->output_offset; |
| 3316 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 3317 | break; |
| 3318 | |
| 3319 | case DT_JMPREL: |
| 3320 | s = htab->srelplt->output_section; |
| 3321 | BFD_ASSERT (s != NULL); |
| 3322 | dyn.d_un.d_ptr = s->vma; |
| 3323 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 3324 | break; |
| 3325 | |
| 3326 | case DT_PLTRELSZ: |
| 3327 | s = htab->srelplt; |
| 3328 | dyn.d_un.d_val = s->size; |
| 3329 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 3330 | break; |
| 3331 | |
| 3332 | case DT_RELASZ: |
| 3333 | /* Don't count procedure linkage table relocs in the |
| 3334 | overall reloc count. */ |
| 3335 | if (htab->srelplt) { |
| 3336 | s = htab->srelplt; |
| 3337 | dyn.d_un.d_val -= s->size; |
| 3338 | } |
| 3339 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 3340 | break; |
| 3341 | |
| 3342 | case DT_RELA: |
| 3343 | /* We may not be using the standard ELF linker script. |
| 3344 | If .rela.plt is the first .rela section, we adjust |
| 3345 | DT_RELA to not include it. */ |
| 3346 | if (htab->srelplt) { |
| 3347 | s = htab->srelplt; |
| 3348 | if (dyn.d_un.d_ptr == s->output_section->vma + s->output_offset) |
| 3349 | dyn.d_un.d_ptr += s->size; |
| 3350 | } |
| 3351 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 3352 | break; |
| 3353 | } |
| 3354 | |
| 3355 | } |
| 3356 | |
| 3357 | /* Fill in the first entry in the procedure linkage table. */ |
| 3358 | splt = htab->splt; |
| 3359 | if (splt && splt->size > 0) |
| 3360 | { |
| 3361 | unsigned long addr; |
| 3362 | /* addr = .got + 4 */ |
| 3363 | addr = htab->sgot->output_section->vma + |
| 3364 | htab->sgot->output_offset + 4; |
| 3365 | if (info->shared) |
| 3366 | { |
| 3367 | addr -= splt->output_section->vma + splt->output_offset; |
| 3368 | bfd_put_32 (output_bfd, |
| 3369 | plt0_pic_entry[0] | (((addr >> 16) & 0xffff) << 3), |
| 3370 | splt->contents); |
| 3371 | bfd_put_32 (output_bfd, |
| 3372 | plt0_pic_entry[1] | ((addr & 0xffff) << 3), |
| 3373 | splt->contents + 4); |
| 3374 | bfd_put_32 (output_bfd, plt0_pic_entry[2], splt->contents + 8); |
| 3375 | bfd_put_32 (output_bfd, plt0_pic_entry[3], splt->contents + 12); |
| 3376 | bfd_put_32 (output_bfd, plt0_pic_entry[4], splt->contents + 16); |
| 3377 | } |
| 3378 | else |
| 3379 | { |
| 3380 | bfd_put_32 (output_bfd, |
| 3381 | plt0_entry[0] | (((addr >> 16) & 0xffff) << 3), |
| 3382 | splt->contents); |
| 3383 | bfd_put_32 (output_bfd, |
| 3384 | plt0_entry[1] | ((addr & 0xffff) << 3), |
| 3385 | splt->contents + 4); |
| 3386 | bfd_put_32 (output_bfd, plt0_entry[2], splt->contents + 8); |
| 3387 | bfd_put_32 (output_bfd, plt0_entry[3], splt->contents + 12); |
| 3388 | bfd_put_32 (output_bfd, plt0_entry[4], splt->contents + 16); |
| 3389 | } |
| 3390 | |
| 3391 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = |
| 3392 | PLT_ENTRY_SIZE; |
| 3393 | } |
| 3394 | } |
| 3395 | |
| 3396 | if (htab->sgot != NULL && htab->sgot->size != 0) |
| 3397 | { |
| 3398 | /* Fill in the first entry in the global offset table. |
| 3399 | We use it to point to our dynamic section, if we have one. */ |
| 3400 | bfd_put_32 (output_bfd, |
| 3401 | sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0, |
| 3402 | htab->sgot->contents); |
| 3403 | |
| 3404 | /* The second entry is reserved for use by the dynamic linker. */ |
| 3405 | memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE); |
| 3406 | |
| 3407 | /* Set .got entry size. */ |
| 3408 | elf_section_data (htab->sgot->output_section) |
| 3409 | ->this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
| 3410 | } |
| 3411 | |
| 3412 | return TRUE; |
| 3413 | } |
| 3414 | |
| 3415 | /* Return the section that should be marked against GC for a given |
| 3416 | relocation. */ |
| 3417 | |
| 3418 | static asection * |
| 3419 | elf_metag_gc_mark_hook (asection *sec, |
| 3420 | struct bfd_link_info *info, |
| 3421 | Elf_Internal_Rela *rela, |
| 3422 | struct elf_link_hash_entry *hh, |
| 3423 | Elf_Internal_Sym *sym) |
| 3424 | { |
| 3425 | if (hh != NULL) |
| 3426 | switch ((unsigned int) ELF32_R_TYPE (rela->r_info)) |
| 3427 | { |
| 3428 | case R_METAG_GNU_VTINHERIT: |
| 3429 | case R_METAG_GNU_VTENTRY: |
| 3430 | return NULL; |
| 3431 | } |
| 3432 | |
| 3433 | return _bfd_elf_gc_mark_hook (sec, info, rela, hh, sym); |
| 3434 | } |
| 3435 | |
| 3436 | /* Update the got and plt entry reference counts for the section being |
| 3437 | removed. */ |
| 3438 | |
| 3439 | static bfd_boolean |
| 3440 | elf_metag_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, |
| 3441 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 3442 | asection *sec ATTRIBUTE_UNUSED, |
| 3443 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) |
| 3444 | { |
| 3445 | Elf_Internal_Shdr *symtab_hdr; |
| 3446 | struct elf_link_hash_entry **eh_syms; |
| 3447 | bfd_signed_vma *local_got_refcounts; |
| 3448 | bfd_signed_vma *local_plt_refcounts; |
| 3449 | const Elf_Internal_Rela *rel, *relend; |
| 3450 | |
| 3451 | if (info->relocatable) |
| 3452 | return TRUE; |
| 3453 | |
| 3454 | elf_section_data (sec)->local_dynrel = NULL; |
| 3455 | |
| 3456 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 3457 | eh_syms = elf_sym_hashes (abfd); |
| 3458 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 3459 | local_plt_refcounts = local_got_refcounts; |
| 3460 | if (local_plt_refcounts != NULL) |
| 3461 | local_plt_refcounts += symtab_hdr->sh_info; |
| 3462 | |
| 3463 | relend = relocs + sec->reloc_count; |
| 3464 | for (rel = relocs; rel < relend; rel++) |
| 3465 | { |
| 3466 | unsigned long r_symndx; |
| 3467 | unsigned int r_type; |
| 3468 | struct elf_link_hash_entry *eh = NULL; |
| 3469 | |
| 3470 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 3471 | if (r_symndx >= symtab_hdr->sh_info) |
| 3472 | { |
| 3473 | struct elf_metag_link_hash_entry *hh; |
| 3474 | struct elf_metag_dyn_reloc_entry **hdh_pp; |
| 3475 | struct elf_metag_dyn_reloc_entry *hdh_p; |
| 3476 | |
| 3477 | eh = eh_syms[r_symndx - symtab_hdr->sh_info]; |
| 3478 | while (eh->root.type == bfd_link_hash_indirect |
| 3479 | || eh->root.type == bfd_link_hash_warning) |
| 3480 | eh = (struct elf_link_hash_entry *) eh->root.u.i.link; |
| 3481 | hh = (struct elf_metag_link_hash_entry *) eh; |
| 3482 | |
| 3483 | for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; |
| 3484 | hdh_pp = &hdh_p->hdh_next) |
| 3485 | if (hdh_p->sec == sec) |
| 3486 | { |
| 3487 | /* Everything must go for SEC. */ |
| 3488 | *hdh_pp = hdh_p->hdh_next; |
| 3489 | break; |
| 3490 | } |
| 3491 | } |
| 3492 | |
| 3493 | r_type = ELF32_R_TYPE (rel->r_info); |
| 3494 | switch (r_type) |
| 3495 | { |
| 3496 | case R_METAG_TLS_LDM: |
| 3497 | if (metag_link_hash_table (info)->tls_ldm_got.refcount > 0) |
| 3498 | metag_link_hash_table (info)->tls_ldm_got.refcount -= 1; |
| 3499 | break; |
| 3500 | case R_METAG_TLS_IE: |
| 3501 | case R_METAG_TLS_GD: |
| 3502 | case R_METAG_GETSET_GOT: |
| 3503 | if (eh != NULL) |
| 3504 | { |
| 3505 | if (eh->got.refcount > 0) |
| 3506 | eh->got.refcount -= 1; |
| 3507 | } |
| 3508 | else if (local_got_refcounts != NULL) |
| 3509 | { |
| 3510 | if (local_got_refcounts[r_symndx] > 0) |
| 3511 | local_got_refcounts[r_symndx] -= 1; |
| 3512 | } |
| 3513 | break; |
| 3514 | |
| 3515 | case R_METAG_RELBRANCH_PLT: |
| 3516 | if (eh != NULL) |
| 3517 | { |
| 3518 | if (eh->plt.refcount > 0) |
| 3519 | eh->plt.refcount -= 1; |
| 3520 | } |
| 3521 | break; |
| 3522 | |
| 3523 | case R_METAG_ADDR32: |
| 3524 | case R_METAG_HIADDR16: |
| 3525 | case R_METAG_LOADDR16: |
| 3526 | case R_METAG_GETSETOFF: |
| 3527 | case R_METAG_RELBRANCH: |
| 3528 | if (eh != NULL) |
| 3529 | { |
| 3530 | struct elf_metag_link_hash_entry *hh; |
| 3531 | struct elf_metag_dyn_reloc_entry **hdh_pp; |
| 3532 | struct elf_metag_dyn_reloc_entry *hdh_p; |
| 3533 | |
| 3534 | if (!info->shared && eh->plt.refcount > 0) |
| 3535 | eh->plt.refcount -= 1; |
| 3536 | |
| 3537 | hh = (struct elf_metag_link_hash_entry *) eh; |
| 3538 | |
| 3539 | for (hdh_pp = &hh->dyn_relocs; (hdh_p = *hdh_pp) != NULL; |
| 3540 | hdh_pp = &hdh_p->hdh_next) |
| 3541 | if (hdh_p->sec == sec) |
| 3542 | { |
| 3543 | if (ELF32_R_TYPE (rel->r_info) == R_METAG_RELBRANCH) |
| 3544 | hdh_p->relative_count -= 1; |
| 3545 | hdh_p->count -= 1; |
| 3546 | if (hdh_p->count == 0) |
| 3547 | *hdh_pp = hdh_p->hdh_next; |
| 3548 | break; |
| 3549 | } |
| 3550 | } |
| 3551 | break; |
| 3552 | |
| 3553 | default: |
| 3554 | break; |
| 3555 | } |
| 3556 | } |
| 3557 | |
| 3558 | return TRUE; |
| 3559 | } |
| 3560 | |
| 3561 | /* Determine the type of stub needed, if any, for a call. */ |
| 3562 | |
| 3563 | static enum elf_metag_stub_type |
| 3564 | metag_type_of_stub (asection *input_sec, |
| 3565 | const Elf_Internal_Rela *rel, |
| 3566 | struct elf_metag_link_hash_entry *hh, |
| 3567 | bfd_vma destination, |
| 3568 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| 3569 | { |
| 3570 | bfd_vma location; |
| 3571 | bfd_vma branch_offset; |
| 3572 | bfd_vma max_branch_offset; |
| 3573 | |
| 3574 | if (hh != NULL && |
| 3575 | !(hh->eh.root.type == bfd_link_hash_defined |
| 3576 | || hh->eh.root.type == bfd_link_hash_defweak)) |
| 3577 | return metag_stub_none; |
| 3578 | |
| 3579 | /* Determine where the call point is. */ |
| 3580 | location = (input_sec->output_offset |
| 3581 | + input_sec->output_section->vma |
| 3582 | + rel->r_offset); |
| 3583 | |
| 3584 | branch_offset = destination - location; |
| 3585 | |
| 3586 | /* Determine if a long branch stub is needed. Meta branch offsets |
| 3587 | are signed 19 bits 4 byte aligned. */ |
| 3588 | max_branch_offset = (1 << (BRANCH_BITS-1)) << 2; |
| 3589 | |
| 3590 | if (branch_offset + max_branch_offset >= 2*max_branch_offset) |
| 3591 | { |
| 3592 | if (info->shared) |
| 3593 | return metag_stub_long_branch_shared; |
| 3594 | else |
| 3595 | return metag_stub_long_branch; |
| 3596 | } |
| 3597 | |
| 3598 | return metag_stub_none; |
| 3599 | } |
| 3600 | |
| 3601 | #define MOVT_A0_3 0x82180005 |
| 3602 | #define JUMP_A0_3 0xac180003 |
| 3603 | |
| 3604 | #define MOVT_A1LBP 0x83080005 |
| 3605 | #define ADD_A1LBP 0x83080000 |
| 3606 | |
| 3607 | #define ADDT_A0_3_CPC 0x82980001 |
| 3608 | #define ADD_A0_3_A0_3 0x82180000 |
| 3609 | #define MOV_PC_A0_3 0xa3180ca0 |
| 3610 | |
| 3611 | static bfd_boolean |
| 3612 | metag_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) |
| 3613 | { |
| 3614 | struct elf_metag_stub_hash_entry *hsh; |
| 3615 | asection *stub_sec; |
| 3616 | bfd *stub_bfd; |
| 3617 | bfd_byte *loc; |
| 3618 | bfd_vma sym_value; |
| 3619 | int size; |
| 3620 | |
| 3621 | /* Massage our args to the form they really have. */ |
| 3622 | hsh = (struct elf_metag_stub_hash_entry *) gen_entry; |
| 3623 | |
| 3624 | stub_sec = hsh->stub_sec; |
| 3625 | |
| 3626 | /* Make a note of the offset within the stubs for this entry. */ |
| 3627 | hsh->stub_offset = stub_sec->size; |
| 3628 | loc = stub_sec->contents + hsh->stub_offset; |
| 3629 | |
| 3630 | stub_bfd = stub_sec->owner; |
| 3631 | |
| 3632 | switch (hsh->stub_type) |
| 3633 | { |
| 3634 | case metag_stub_long_branch_shared: |
| 3635 | /* A PIC long branch stub is an ADDT and an ADD instruction used to |
| 3636 | calculate the jump target using A0.3 as a temporary. Then a MOV |
| 3637 | to PC carries out the jump. */ |
| 3638 | sym_value = (hsh->target_value |
| 3639 | + hsh->target_section->output_offset |
| 3640 | + hsh->target_section->output_section->vma |
| 3641 | + hsh->addend); |
| 3642 | |
| 3643 | sym_value -= (hsh->stub_offset |
| 3644 | + stub_sec->output_offset |
| 3645 | + stub_sec->output_section->vma); |
| 3646 | |
| 3647 | bfd_put_32 (stub_bfd, ADDT_A0_3_CPC | (((sym_value >> 16) & 0xffff) << 3), |
| 3648 | loc); |
| 3649 | |
| 3650 | bfd_put_32 (stub_bfd, ADD_A0_3_A0_3 | ((sym_value & 0xffff) << 3), |
| 3651 | loc + 4); |
| 3652 | |
| 3653 | bfd_put_32 (stub_bfd, MOV_PC_A0_3, loc + 8); |
| 3654 | |
| 3655 | size = 12; |
| 3656 | break; |
| 3657 | case metag_stub_long_branch: |
| 3658 | /* A standard long branch stub is a MOVT instruction followed by a |
| 3659 | JUMP instruction using the A0.3 register as a temporary. This is |
| 3660 | the same method used by the LDLK linker (patch.c). */ |
| 3661 | sym_value = (hsh->target_value |
| 3662 | + hsh->target_section->output_offset |
| 3663 | + hsh->target_section->output_section->vma |
| 3664 | + hsh->addend); |
| 3665 | |
| 3666 | bfd_put_32 (stub_bfd, MOVT_A0_3 | (((sym_value >> 16) & 0xffff) << 3), |
| 3667 | loc); |
| 3668 | |
| 3669 | bfd_put_32 (stub_bfd, JUMP_A0_3 | ((sym_value & 0xffff) << 3), loc + 4); |
| 3670 | |
| 3671 | size = 8; |
| 3672 | break; |
| 3673 | default: |
| 3674 | BFD_FAIL (); |
| 3675 | return FALSE; |
| 3676 | } |
| 3677 | |
| 3678 | stub_sec->size += size; |
| 3679 | return TRUE; |
| 3680 | } |
| 3681 | |
| 3682 | /* As above, but don't actually build the stub. Just bump offset so |
| 3683 | we know stub section sizes. */ |
| 3684 | |
| 3685 | static bfd_boolean |
| 3686 | metag_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg ATTRIBUTE_UNUSED) |
| 3687 | { |
| 3688 | struct elf_metag_stub_hash_entry *hsh; |
| 3689 | int size = 0; |
| 3690 | |
| 3691 | /* Massage our args to the form they really have. */ |
| 3692 | hsh = (struct elf_metag_stub_hash_entry *) gen_entry; |
| 3693 | |
| 3694 | if (hsh->stub_type == metag_stub_long_branch) |
| 3695 | size = 8; |
| 3696 | else if (hsh->stub_type == metag_stub_long_branch_shared) |
| 3697 | size = 12; |
| 3698 | |
| 3699 | hsh->stub_sec->size += size; |
| 3700 | return TRUE; |
| 3701 | } |
| 3702 | |
| 3703 | /* Set up various things so that we can make a list of input sections |
| 3704 | for each output section included in the link. Returns -1 on error, |
| 3705 | 0 when no stubs will be needed, and 1 on success. */ |
| 3706 | |
| 3707 | int |
| 3708 | elf_metag_setup_section_lists (bfd *output_bfd, struct bfd_link_info *info) |
| 3709 | { |
| 3710 | bfd *input_bfd; |
| 3711 | unsigned int bfd_count; |
| 3712 | int top_id, top_index; |
| 3713 | asection *section; |
| 3714 | asection **input_list, **list; |
| 3715 | bfd_size_type amt; |
| 3716 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); |
| 3717 | |
| 3718 | /* Count the number of input BFDs and find the top input section id. */ |
| 3719 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| 3720 | input_bfd != NULL; |
| 3721 | input_bfd = input_bfd->link_next) |
| 3722 | { |
| 3723 | bfd_count += 1; |
| 3724 | for (section = input_bfd->sections; |
| 3725 | section != NULL; |
| 3726 | section = section->next) |
| 3727 | { |
| 3728 | if (top_id < section->id) |
| 3729 | top_id = section->id; |
| 3730 | } |
| 3731 | } |
| 3732 | |
| 3733 | htab->bfd_count = bfd_count; |
| 3734 | |
| 3735 | amt = sizeof (struct map_stub) * (top_id + 1); |
| 3736 | htab->stub_group = bfd_zmalloc (amt); |
| 3737 | if (htab->stub_group == NULL) |
| 3738 | return -1; |
| 3739 | |
| 3740 | /* We can't use output_bfd->section_count here to find the top output |
| 3741 | section index as some sections may have been removed, and |
| 3742 | strip_excluded_output_sections doesn't renumber the indices. */ |
| 3743 | for (section = output_bfd->sections, top_index = 0; |
| 3744 | section != NULL; |
| 3745 | section = section->next) |
| 3746 | { |
| 3747 | if (top_index < section->index) |
| 3748 | top_index = section->index; |
| 3749 | } |
| 3750 | |
| 3751 | htab->top_index = top_index; |
| 3752 | amt = sizeof (asection *) * (top_index + 1); |
| 3753 | input_list = bfd_malloc (amt); |
| 3754 | htab->input_list = input_list; |
| 3755 | if (input_list == NULL) |
| 3756 | return -1; |
| 3757 | |
| 3758 | /* For sections we aren't interested in, mark their entries with a |
| 3759 | value we can check later. */ |
| 3760 | list = input_list + top_index; |
| 3761 | do |
| 3762 | *list = bfd_abs_section_ptr; |
| 3763 | while (list-- != input_list); |
| 3764 | |
| 3765 | for (section = output_bfd->sections; |
| 3766 | section != NULL; |
| 3767 | section = section->next) |
| 3768 | { |
| 3769 | /* FIXME: This is a bit of hack. Currently our .ctors and .dtors |
| 3770 | * have PC relative relocs in them but no code flag set. */ |
| 3771 | if (((section->flags & SEC_CODE) != 0) || |
| 3772 | strcmp(".ctors", section->name) || |
| 3773 | strcmp(".dtors", section->name)) |
| 3774 | input_list[section->index] = NULL; |
| 3775 | } |
| 3776 | |
| 3777 | return 1; |
| 3778 | } |
| 3779 | |
| 3780 | /* The linker repeatedly calls this function for each input section, |
| 3781 | in the order that input sections are linked into output sections. |
| 3782 | Build lists of input sections to determine groupings between which |
| 3783 | we may insert linker stubs. */ |
| 3784 | |
| 3785 | void |
| 3786 | elf_metag_next_input_section (struct bfd_link_info *info, asection *isec) |
| 3787 | { |
| 3788 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); |
| 3789 | |
| 3790 | if (isec->output_section->index <= htab->top_index) |
| 3791 | { |
| 3792 | asection **list = htab->input_list + isec->output_section->index; |
| 3793 | if (*list != bfd_abs_section_ptr) |
| 3794 | { |
| 3795 | /* Steal the link_sec pointer for our list. */ |
| 3796 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| 3797 | /* This happens to make the list in reverse order, |
| 3798 | which is what we want. */ |
| 3799 | PREV_SEC (isec) = *list; |
| 3800 | *list = isec; |
| 3801 | } |
| 3802 | } |
| 3803 | } |
| 3804 | |
| 3805 | /* See whether we can group stub sections together. Grouping stub |
| 3806 | sections may result in fewer stubs. More importantly, we need to |
| 3807 | put all .init* and .fini* stubs at the beginning of the .init or |
| 3808 | .fini output sections respectively, because glibc splits the |
| 3809 | _init and _fini functions into multiple parts. Putting a stub in |
| 3810 | the middle of a function is not a good idea. */ |
| 3811 | |
| 3812 | static void |
| 3813 | group_sections (struct elf_metag_link_hash_table *htab, |
| 3814 | bfd_size_type stub_group_size, |
| 3815 | bfd_boolean stubs_always_before_branch) |
| 3816 | { |
| 3817 | asection **list = htab->input_list + htab->top_index; |
| 3818 | do |
| 3819 | { |
| 3820 | asection *tail = *list; |
| 3821 | if (tail == bfd_abs_section_ptr) |
| 3822 | continue; |
| 3823 | while (tail != NULL) |
| 3824 | { |
| 3825 | asection *curr; |
| 3826 | asection *prev; |
| 3827 | bfd_size_type total; |
| 3828 | bfd_boolean big_sec; |
| 3829 | |
| 3830 | curr = tail; |
| 3831 | total = tail->size; |
| 3832 | big_sec = total >= stub_group_size; |
| 3833 | |
| 3834 | while ((prev = PREV_SEC (curr)) != NULL |
| 3835 | && ((total += curr->output_offset - prev->output_offset) |
| 3836 | < stub_group_size)) |
| 3837 | curr = prev; |
| 3838 | |
| 3839 | /* OK, the size from the start of CURR to the end is less |
| 3840 | than stub_group_size bytes and thus can be handled by one stub |
| 3841 | section. (or the tail section is itself larger than |
| 3842 | stub_group_size bytes, in which case we may be toast.) |
| 3843 | We should really be keeping track of the total size of |
| 3844 | stubs added here, as stubs contribute to the final output |
| 3845 | section size. */ |
| 3846 | do |
| 3847 | { |
| 3848 | prev = PREV_SEC (tail); |
| 3849 | /* Set up this stub group. */ |
| 3850 | htab->stub_group[tail->id].link_sec = curr; |
| 3851 | } |
| 3852 | while (tail != curr && (tail = prev) != NULL); |
| 3853 | |
| 3854 | /* But wait, there's more! Input sections up to stub_group_size |
| 3855 | bytes before the stub section can be handled by it too. |
| 3856 | Don't do this if we have a really large section after the |
| 3857 | stubs, as adding more stubs increases the chance that |
| 3858 | branches may not reach into the stub section. */ |
| 3859 | if (!stubs_always_before_branch && !big_sec) |
| 3860 | { |
| 3861 | total = 0; |
| 3862 | while (prev != NULL |
| 3863 | && ((total += tail->output_offset - prev->output_offset) |
| 3864 | < stub_group_size)) |
| 3865 | { |
| 3866 | tail = prev; |
| 3867 | prev = PREV_SEC (tail); |
| 3868 | htab->stub_group[tail->id].link_sec = curr; |
| 3869 | } |
| 3870 | } |
| 3871 | tail = prev; |
| 3872 | } |
| 3873 | } |
| 3874 | while (list-- != htab->input_list); |
| 3875 | free (htab->input_list); |
| 3876 | #undef PREV_SEC |
| 3877 | } |
| 3878 | |
| 3879 | /* Read in all local syms for all input bfds. |
| 3880 | Returns -1 on error, 0 otherwise. */ |
| 3881 | |
| 3882 | static int |
| 3883 | get_local_syms (bfd *output_bfd ATTRIBUTE_UNUSED, bfd *input_bfd, |
| 3884 | struct bfd_link_info *info) |
| 3885 | { |
| 3886 | unsigned int bfd_indx; |
| 3887 | Elf_Internal_Sym *local_syms, **all_local_syms; |
| 3888 | int stub_changed = 0; |
| 3889 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); |
| 3890 | |
| 3891 | /* We want to read in symbol extension records only once. To do this |
| 3892 | we need to read in the local symbols in parallel and save them for |
| 3893 | later use; so hold pointers to the local symbols in an array. */ |
| 3894 | bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
| 3895 | all_local_syms = bfd_zmalloc (amt); |
| 3896 | htab->all_local_syms = all_local_syms; |
| 3897 | if (all_local_syms == NULL) |
| 3898 | return -1; |
| 3899 | |
| 3900 | /* Walk over all the input BFDs, swapping in local symbols. */ |
| 3901 | for (bfd_indx = 0; |
| 3902 | input_bfd != NULL; |
| 3903 | input_bfd = input_bfd->link_next, bfd_indx++) |
| 3904 | { |
| 3905 | Elf_Internal_Shdr *symtab_hdr; |
| 3906 | |
| 3907 | /* We'll need the symbol table in a second. */ |
| 3908 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 3909 | if (symtab_hdr->sh_info == 0) |
| 3910 | continue; |
| 3911 | |
| 3912 | /* We need an array of the local symbols attached to the input bfd. */ |
| 3913 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 3914 | if (local_syms == NULL) |
| 3915 | { |
| 3916 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 3917 | symtab_hdr->sh_info, 0, |
| 3918 | NULL, NULL, NULL); |
| 3919 | /* Cache them for elf_link_input_bfd. */ |
| 3920 | symtab_hdr->contents = (unsigned char *) local_syms; |
| 3921 | } |
| 3922 | if (local_syms == NULL) |
| 3923 | return -1; |
| 3924 | |
| 3925 | all_local_syms[bfd_indx] = local_syms; |
| 3926 | } |
| 3927 | |
| 3928 | return stub_changed; |
| 3929 | } |
| 3930 | |
| 3931 | /* Determine and set the size of the stub section for a final link. |
| 3932 | |
| 3933 | The basic idea here is to examine all the relocations looking for |
| 3934 | PC-relative calls to a target that is unreachable with a "CALLR" |
| 3935 | instruction. */ |
| 3936 | |
| 3937 | /* See elf32-hppa.c and elf64-ppc.c. */ |
| 3938 | |
| 3939 | bfd_boolean |
| 3940 | elf_metag_size_stubs(bfd *output_bfd, bfd *stub_bfd, |
| 3941 | struct bfd_link_info *info, |
| 3942 | bfd_signed_vma group_size, |
| 3943 | asection * (*add_stub_section) (const char *, asection *), |
| 3944 | void (*layout_sections_again) (void)) |
| 3945 | { |
| 3946 | bfd_size_type stub_group_size; |
| 3947 | bfd_boolean stubs_always_before_branch; |
| 3948 | bfd_boolean stub_changed; |
| 3949 | struct elf_metag_link_hash_table *htab = metag_link_hash_table (info); |
| 3950 | |
| 3951 | /* Stash our params away. */ |
| 3952 | htab->stub_bfd = stub_bfd; |
| 3953 | htab->add_stub_section = add_stub_section; |
| 3954 | htab->layout_sections_again = layout_sections_again; |
| 3955 | stubs_always_before_branch = group_size < 0; |
| 3956 | if (group_size < 0) |
| 3957 | stub_group_size = -group_size; |
| 3958 | else |
| 3959 | stub_group_size = group_size; |
| 3960 | if (stub_group_size == 1) |
| 3961 | { |
| 3962 | /* Default values. */ |
| 3963 | /* FIXME: not sure what these values should be */ |
| 3964 | if (stubs_always_before_branch) |
| 3965 | { |
| 3966 | stub_group_size = (1 << BRANCH_BITS); |
| 3967 | } |
| 3968 | else |
| 3969 | { |
| 3970 | stub_group_size = (1 << BRANCH_BITS); |
| 3971 | } |
| 3972 | } |
| 3973 | |
| 3974 | group_sections (htab, stub_group_size, stubs_always_before_branch); |
| 3975 | |
| 3976 | switch (get_local_syms (output_bfd, info->input_bfds, info)) |
| 3977 | { |
| 3978 | default: |
| 3979 | if (htab->all_local_syms) |
| 3980 | goto error_ret_free_local; |
| 3981 | return FALSE; |
| 3982 | |
| 3983 | case 0: |
| 3984 | stub_changed = FALSE; |
| 3985 | break; |
| 3986 | |
| 3987 | case 1: |
| 3988 | stub_changed = TRUE; |
| 3989 | break; |
| 3990 | } |
| 3991 | |
| 3992 | while (1) |
| 3993 | { |
| 3994 | bfd *input_bfd; |
| 3995 | unsigned int bfd_indx; |
| 3996 | asection *stub_sec; |
| 3997 | |
| 3998 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 3999 | input_bfd != NULL; |
| 4000 | input_bfd = input_bfd->link_next, bfd_indx++) |
| 4001 | { |
| 4002 | Elf_Internal_Shdr *symtab_hdr; |
| 4003 | asection *section; |
| 4004 | Elf_Internal_Sym *local_syms; |
| 4005 | |
| 4006 | /* We'll need the symbol table in a second. */ |
| 4007 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 4008 | if (symtab_hdr->sh_info == 0) |
| 4009 | continue; |
| 4010 | |
| 4011 | local_syms = htab->all_local_syms[bfd_indx]; |
| 4012 | |
| 4013 | /* Walk over each section attached to the input bfd. */ |
| 4014 | for (section = input_bfd->sections; |
| 4015 | section != NULL; |
| 4016 | section = section->next) |
| 4017 | { |
| 4018 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 4019 | |
| 4020 | /* If there aren't any relocs, then there's nothing more |
| 4021 | to do. */ |
| 4022 | if ((section->flags & SEC_RELOC) == 0 |
| 4023 | || section->reloc_count == 0) |
| 4024 | continue; |
| 4025 | |
| 4026 | /* If this section is a link-once section that will be |
| 4027 | discarded, then don't create any stubs. */ |
| 4028 | if (section->output_section == NULL |
| 4029 | || section->output_section->owner != output_bfd) |
| 4030 | continue; |
| 4031 | |
| 4032 | /* Get the relocs. */ |
| 4033 | internal_relocs |
| 4034 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, |
| 4035 | info->keep_memory); |
| 4036 | if (internal_relocs == NULL) |
| 4037 | goto error_ret_free_local; |
| 4038 | |
| 4039 | /* Now examine each relocation. */ |
| 4040 | irela = internal_relocs; |
| 4041 | irelaend = irela + section->reloc_count; |
| 4042 | for (; irela < irelaend; irela++) |
| 4043 | { |
| 4044 | unsigned int r_type, r_indx; |
| 4045 | enum elf_metag_stub_type stub_type; |
| 4046 | struct elf_metag_stub_hash_entry *hsh; |
| 4047 | asection *sym_sec; |
| 4048 | bfd_vma sym_value; |
| 4049 | bfd_vma destination; |
| 4050 | struct elf_metag_link_hash_entry *hh; |
| 4051 | char *stub_name; |
| 4052 | const asection *id_sec; |
| 4053 | |
| 4054 | r_type = ELF32_R_TYPE (irela->r_info); |
| 4055 | r_indx = ELF32_R_SYM (irela->r_info); |
| 4056 | |
| 4057 | if (r_type >= (unsigned int) R_METAG_MAX) |
| 4058 | { |
| 4059 | bfd_set_error (bfd_error_bad_value); |
| 4060 | error_ret_free_internal: |
| 4061 | if (elf_section_data (section)->relocs == NULL) |
| 4062 | free (internal_relocs); |
| 4063 | goto error_ret_free_local; |
| 4064 | } |
| 4065 | |
| 4066 | /* Only look for stubs on CALLR and B instructions. */ |
| 4067 | if (!(r_type == (unsigned int) R_METAG_RELBRANCH || |
| 4068 | r_type == (unsigned int) R_METAG_RELBRANCH_PLT)) |
| 4069 | continue; |
| 4070 | |
| 4071 | /* Now determine the call target, its name, value, |
| 4072 | section. */ |
| 4073 | sym_sec = NULL; |
| 4074 | sym_value = 0; |
| 4075 | destination = 0; |
| 4076 | hh = NULL; |
| 4077 | if (r_indx < symtab_hdr->sh_info) |
| 4078 | { |
| 4079 | /* It's a local symbol. */ |
| 4080 | Elf_Internal_Sym *sym; |
| 4081 | Elf_Internal_Shdr *hdr; |
| 4082 | unsigned int shndx; |
| 4083 | |
| 4084 | sym = local_syms + r_indx; |
| 4085 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 4086 | sym_value = sym->st_value; |
| 4087 | shndx = sym->st_shndx; |
| 4088 | if (shndx < elf_numsections (input_bfd)) |
| 4089 | { |
| 4090 | hdr = elf_elfsections (input_bfd)[shndx]; |
| 4091 | sym_sec = hdr->bfd_section; |
| 4092 | destination = (sym_value + irela->r_addend |
| 4093 | + sym_sec->output_offset |
| 4094 | + sym_sec->output_section->vma); |
| 4095 | } |
| 4096 | } |
| 4097 | else |
| 4098 | { |
| 4099 | /* It's an external symbol. */ |
| 4100 | int e_indx; |
| 4101 | |
| 4102 | e_indx = r_indx - symtab_hdr->sh_info; |
| 4103 | hh = ((struct elf_metag_link_hash_entry *) |
| 4104 | elf_sym_hashes (input_bfd)[e_indx]); |
| 4105 | |
| 4106 | while (hh->eh.root.type == bfd_link_hash_indirect |
| 4107 | || hh->eh.root.type == bfd_link_hash_warning) |
| 4108 | hh = ((struct elf_metag_link_hash_entry *) |
| 4109 | hh->eh.root.u.i.link); |
| 4110 | |
| 4111 | if (hh->eh.root.type == bfd_link_hash_defined |
| 4112 | || hh->eh.root.type == bfd_link_hash_defweak) |
| 4113 | { |
| 4114 | sym_sec = hh->eh.root.u.def.section; |
| 4115 | sym_value = hh->eh.root.u.def.value; |
| 4116 | if (hh->eh.plt.offset != (bfd_vma) -1 |
| 4117 | && hh->eh.dynindx != -1 |
| 4118 | && r_type == (unsigned int) R_METAG_RELBRANCH_PLT) |
| 4119 | { |
| 4120 | sym_sec = htab->splt; |
| 4121 | sym_value = hh->eh.plt.offset; |
| 4122 | } |
| 4123 | |
| 4124 | if (sym_sec->output_section != NULL) |
| 4125 | destination = (sym_value + irela->r_addend |
| 4126 | + sym_sec->output_offset |
| 4127 | + sym_sec->output_section->vma); |
| 4128 | else |
| 4129 | continue; |
| 4130 | } |
| 4131 | else if (hh->eh.root.type == bfd_link_hash_undefweak) |
| 4132 | { |
| 4133 | if (! info->shared) |
| 4134 | continue; |
| 4135 | } |
| 4136 | else if (hh->eh.root.type == bfd_link_hash_undefined) |
| 4137 | { |
| 4138 | if (! (info->unresolved_syms_in_objects == RM_IGNORE |
| 4139 | && (ELF_ST_VISIBILITY (hh->eh.other) |
| 4140 | == STV_DEFAULT))) |
| 4141 | continue; |
| 4142 | } |
| 4143 | else |
| 4144 | { |
| 4145 | bfd_set_error (bfd_error_bad_value); |
| 4146 | goto error_ret_free_internal; |
| 4147 | } |
| 4148 | } |
| 4149 | |
| 4150 | /* Determine what (if any) linker stub is needed. */ |
| 4151 | stub_type = metag_type_of_stub (section, irela, hh, |
| 4152 | destination, info); |
| 4153 | if (stub_type == metag_stub_none) |
| 4154 | continue; |
| 4155 | |
| 4156 | /* Support for grouping stub sections. */ |
| 4157 | id_sec = htab->stub_group[section->id].link_sec; |
| 4158 | |
| 4159 | /* Get the name of this stub. */ |
| 4160 | stub_name = metag_stub_name (id_sec, sym_sec, hh, irela); |
| 4161 | if (!stub_name) |
| 4162 | goto error_ret_free_internal; |
| 4163 | |
| 4164 | hsh = metag_stub_hash_lookup (&htab->bstab, |
| 4165 | stub_name, |
| 4166 | FALSE, FALSE); |
| 4167 | if (hsh != NULL) |
| 4168 | { |
| 4169 | /* The proper stub has already been created. */ |
| 4170 | free (stub_name); |
| 4171 | continue; |
| 4172 | } |
| 4173 | |
| 4174 | hsh = metag_add_stub (stub_name, section, htab); |
| 4175 | if (hsh == NULL) |
| 4176 | { |
| 4177 | free (stub_name); |
| 4178 | goto error_ret_free_internal; |
| 4179 | } |
| 4180 | hsh->target_value = sym_value; |
| 4181 | hsh->target_section = sym_sec; |
| 4182 | hsh->stub_type = stub_type; |
| 4183 | hsh->hh = hh; |
| 4184 | hsh->addend = irela->r_addend; |
| 4185 | stub_changed = TRUE; |
| 4186 | } |
| 4187 | |
| 4188 | /* We're done with the internal relocs, free them. */ |
| 4189 | if (elf_section_data (section)->relocs == NULL) |
| 4190 | free (internal_relocs); |
| 4191 | } |
| 4192 | } |
| 4193 | |
| 4194 | if (!stub_changed) |
| 4195 | break; |
| 4196 | |
| 4197 | /* OK, we've added some stubs. Find out the new size of the |
| 4198 | stub sections. */ |
| 4199 | for (stub_sec = htab->stub_bfd->sections; |
| 4200 | stub_sec != NULL; |
| 4201 | stub_sec = stub_sec->next) |
| 4202 | stub_sec->size = 0; |
| 4203 | |
| 4204 | bfd_hash_traverse (&htab->bstab, metag_size_one_stub, htab); |
| 4205 | |
| 4206 | /* Ask the linker to do its stuff. */ |
| 4207 | (*htab->layout_sections_again) (); |
| 4208 | stub_changed = FALSE; |
| 4209 | } |
| 4210 | |
| 4211 | free (htab->all_local_syms); |
| 4212 | return TRUE; |
| 4213 | |
| 4214 | error_ret_free_local: |
| 4215 | free (htab->all_local_syms); |
| 4216 | return FALSE; |
| 4217 | } |
| 4218 | |
| 4219 | /* Build all the stubs associated with the current output file. The |
| 4220 | stubs are kept in a hash table attached to the main linker hash |
| 4221 | table. This function is called via metagelf_finish in the linker. */ |
| 4222 | |
| 4223 | bfd_boolean |
| 4224 | elf_metag_build_stubs (struct bfd_link_info *info) |
| 4225 | { |
| 4226 | asection *stub_sec; |
| 4227 | struct bfd_hash_table *table; |
| 4228 | struct elf_metag_link_hash_table *htab; |
| 4229 | |
| 4230 | htab = metag_link_hash_table (info); |
| 4231 | |
| 4232 | for (stub_sec = htab->stub_bfd->sections; |
| 4233 | stub_sec != NULL; |
| 4234 | stub_sec = stub_sec->next) |
| 4235 | { |
| 4236 | bfd_size_type size; |
| 4237 | |
| 4238 | /* Allocate memory to hold the linker stubs. */ |
| 4239 | size = stub_sec->size; |
| 4240 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); |
| 4241 | if (stub_sec->contents == NULL && size != 0) |
| 4242 | return FALSE; |
| 4243 | stub_sec->size = 0; |
| 4244 | } |
| 4245 | |
| 4246 | /* Build the stubs as directed by the stub hash table. */ |
| 4247 | table = &htab->bstab; |
| 4248 | bfd_hash_traverse (table, metag_build_one_stub, info); |
| 4249 | |
| 4250 | return TRUE; |
| 4251 | } |
| 4252 | |
| 4253 | /* Return TRUE if SYM represents a local label symbol. */ |
| 4254 | |
| 4255 | static bfd_boolean |
| 4256 | elf_metag_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name) |
| 4257 | { |
| 4258 | if (name[0] == '$' && name[1] == 'L') |
| 4259 | return 1; |
| 4260 | return _bfd_elf_is_local_label_name (abfd, name); |
| 4261 | } |
| 4262 | |
| 4263 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
| 4264 | or (bfd_vma) -1 if it should not be included. */ |
| 4265 | |
| 4266 | static bfd_vma |
| 4267 | elf_metag_plt_sym_val (bfd_vma i, const asection *plt, |
| 4268 | const arelent *rel ATTRIBUTE_UNUSED) |
| 4269 | { |
| 4270 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; |
| 4271 | } |
| 4272 | |
| 4273 | #define ELF_ARCH bfd_arch_metag |
| 4274 | #define ELF_TARGET_ID METAG_ELF_DATA |
| 4275 | #define ELF_MACHINE_CODE EM_METAG |
| 4276 | #define ELF_MINPAGESIZE 0x1000 |
| 4277 | #define ELF_MAXPAGESIZE 0x4000 |
| 4278 | #define ELF_COMMONPAGESIZE 0x1000 |
| 4279 | |
| 4280 | #define TARGET_LITTLE_SYM bfd_elf32_metag_vec |
| 4281 | #define TARGET_LITTLE_NAME "elf32-metag" |
| 4282 | |
| 4283 | #define elf_symbol_leading_char '_' |
| 4284 | |
| 4285 | #define elf_info_to_howto_rel NULL |
| 4286 | #define elf_info_to_howto metag_info_to_howto_rela |
| 4287 | |
| 4288 | #define bfd_elf32_bfd_is_local_label_name elf_metag_is_local_label_name |
| 4289 | #define bfd_elf32_bfd_link_hash_table_create \ |
| 4290 | elf_metag_link_hash_table_create |
| 4291 | #define bfd_elf32_bfd_link_hash_table_free elf_metag_link_hash_table_free |
| 4292 | #define elf_backend_relocate_section elf_metag_relocate_section |
| 4293 | #define elf_backend_gc_mark_hook elf_metag_gc_mark_hook |
| 4294 | #define elf_backend_gc_sweep_hook elf_metag_gc_sweep_hook |
| 4295 | #define elf_backend_check_relocs elf_metag_check_relocs |
| 4296 | #define elf_backend_create_dynamic_sections elf_metag_create_dynamic_sections |
| 4297 | #define elf_backend_adjust_dynamic_symbol elf_metag_adjust_dynamic_symbol |
| 4298 | #define elf_backend_finish_dynamic_symbol elf_metag_finish_dynamic_symbol |
| 4299 | #define elf_backend_finish_dynamic_sections elf_metag_finish_dynamic_sections |
| 4300 | #define elf_backend_size_dynamic_sections elf_metag_size_dynamic_sections |
| 4301 | #define elf_backend_omit_section_dynsym \ |
| 4302 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) |
| 4303 | #define elf_backend_post_process_headers elf_metag_post_process_headers |
| 4304 | #define elf_backend_reloc_type_class elf_metag_reloc_type_class |
| 4305 | #define elf_backend_copy_indirect_symbol elf_metag_copy_indirect_symbol |
| 4306 | #define elf_backend_plt_sym_val elf_metag_plt_sym_val |
| 4307 | |
| 4308 | #define elf_backend_can_gc_sections 1 |
| 4309 | #define elf_backend_can_refcount 1 |
| 4310 | #define elf_backend_got_header_size 12 |
| 4311 | #define elf_backend_rela_normal 1 |
| 4312 | #define elf_backend_want_got_sym 0 |
| 4313 | #define elf_backend_want_plt_sym 0 |
| 4314 | #define elf_backend_plt_readonly 1 |
| 4315 | |
| 4316 | #define bfd_elf32_bfd_reloc_type_lookup metag_reloc_type_lookup |
| 4317 | #define bfd_elf32_bfd_reloc_name_lookup metag_reloc_name_lookup |
| 4318 | |
| 4319 | #include "elf32-target.h" |