| 1 | /* 32-bit ELF support for C-SKY. |
| 2 | Copyright (C) 1998-2019 Free Software Foundation, Inc. |
| 3 | Contributed by C-SKY Microsystems and Mentor Graphics. |
| 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 "bfdlink.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/csky.h" |
| 28 | #include "opcode/csky.h" |
| 29 | #include <assert.h> |
| 30 | #include "libiberty.h" |
| 31 | |
| 32 | /* Data structures used for merging different arch variants. |
| 33 | V1 (510/610) and V2 (8xx) processors are incompatible, but |
| 34 | we can merge wthin each family. */ |
| 35 | |
| 36 | enum merge_class |
| 37 | { |
| 38 | CSKY_V1, |
| 39 | CSKY_V2 |
| 40 | }; |
| 41 | |
| 42 | typedef struct csky_arch_for_merge |
| 43 | { |
| 44 | const char *name; |
| 45 | const unsigned long arch_eflag; |
| 46 | /* The files can merge only if they are in same class. */ |
| 47 | enum merge_class class; |
| 48 | /* When input files have different levels, |
| 49 | the target sets arch_eflag to the largest level file's arch_eflag. */ |
| 50 | unsigned int class_level; |
| 51 | /* Control whether to print warning when merging with different arch. */ |
| 52 | unsigned int do_warning; |
| 53 | } csky_arch_for_merge; |
| 54 | |
| 55 | static struct csky_arch_for_merge csky_archs[] = |
| 56 | { |
| 57 | /* 510 and 610 merge to 610 without warning. */ |
| 58 | { "510", CSKY_ARCH_510, CSKY_V1, 0, 0}, |
| 59 | { "610", CSKY_ARCH_610, CSKY_V1, 1, 0}, |
| 60 | /* 801, 802, 803, 807, 810 merge to largest one. */ |
| 61 | { "801", CSKY_ARCH_801, CSKY_V2, 0, 1}, |
| 62 | { "802", CSKY_ARCH_802, CSKY_V2, 1, 1}, |
| 63 | { "803", CSKY_ARCH_803, CSKY_V2, 2, 1}, |
| 64 | { "807", CSKY_ARCH_807, CSKY_V2, 3, 1}, |
| 65 | { "810", CSKY_ARCH_810, CSKY_V2, 4, 1}, |
| 66 | { NULL, 0, 0, 0, 0} |
| 67 | }; |
| 68 | |
| 69 | /* Return the ARCH bits out of ABFD. */ |
| 70 | #define bfd_csky_arch(abfd) \ |
| 71 | (elf_elfheader (abfd)->e_flags & CSKY_ARCH_MASK) |
| 72 | |
| 73 | /* Return the ABI bits out of ABFD. */ |
| 74 | #define bfd_csky_abi(abfd) \ |
| 75 | (elf_elfheader (abfd)->e_flags & CSKY_ABI_MASK) |
| 76 | |
| 77 | |
| 78 | /* The index of a howto-item is implicitly equal to |
| 79 | the corresponding Relocation Type Encoding. */ |
| 80 | static reloc_howto_type csky_elf_howto_table[] = |
| 81 | { |
| 82 | /* 0 */ |
| 83 | HOWTO (R_CKCORE_NONE, /* type */ |
| 84 | 0, /* rightshift */ |
| 85 | 0, /* size */ |
| 86 | 0, /* bitsize */ |
| 87 | FALSE, /* pc_relative */ |
| 88 | 0, /* bitpos */ |
| 89 | complain_overflow_dont, /* complain_on_overflow */ |
| 90 | NULL, /* special_function */ |
| 91 | "R_CKCORE_NONE", /* name */ |
| 92 | FALSE, /* partial_inplace */ |
| 93 | 0, /* src_mask */ |
| 94 | 0, /* dst_mask */ |
| 95 | FALSE), /* pcrel_offset */ |
| 96 | |
| 97 | /* 1. */ |
| 98 | HOWTO (R_CKCORE_ADDR32, /* type */ |
| 99 | 0, /* rightshift */ |
| 100 | 2, /* size */ |
| 101 | 32, /* bitsize */ |
| 102 | FALSE, /* pc_relative */ |
| 103 | 0, /* bitpos */ |
| 104 | complain_overflow_dont, /* complain_on_overflow */ |
| 105 | bfd_elf_generic_reloc, /* special_function */ |
| 106 | "R_CKCORE_ADDR32", /* name */ |
| 107 | FALSE, /* partial_inplace */ |
| 108 | 0, /* src_mask */ |
| 109 | 0xffffffff, /* dst_mask */ |
| 110 | FALSE), /* pcrel_offset */ |
| 111 | |
| 112 | /* 2: Only for csky v1. */ |
| 113 | HOWTO (R_CKCORE_PCREL_IMM8BY4, /* type */ |
| 114 | 2, /* rightshift */ |
| 115 | 1, /* size */ |
| 116 | 8, /* bitsize */ |
| 117 | TRUE, /* pc_relative */ |
| 118 | 0, /* bitpos */ |
| 119 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 120 | NULL, /* special_function */ |
| 121 | "R_CKCORE_PCREL_IMM8BY4", /* name */ |
| 122 | FALSE, /* partial_inplace */ |
| 123 | 0xff, /* src_mask */ |
| 124 | 0xff, /* dst_mask */ |
| 125 | TRUE), /* pcrel_offset */ |
| 126 | |
| 127 | /* 3: Only for csky v1. */ |
| 128 | HOWTO (R_CKCORE_PCREL_IMM11BY2, /* type */ |
| 129 | 1, /* rightshift */ |
| 130 | 1, /* size */ |
| 131 | 11, /* bitsize */ |
| 132 | TRUE, /* pc_relative */ |
| 133 | 0, /* bitpos */ |
| 134 | complain_overflow_signed, /* complain_on_overflow */ |
| 135 | bfd_elf_generic_reloc, /* special_function */ |
| 136 | "R_CKCORE_PCREL_IMM11BY2", /* name */ |
| 137 | FALSE, /* partial_inplace */ |
| 138 | 0x7ff, /* src_mask */ |
| 139 | 0x7ff, /* dst_mask */ |
| 140 | TRUE), /* pcrel_offset */ |
| 141 | |
| 142 | /* 4: DELETED. */ |
| 143 | HOWTO (R_CKCORE_PCREL_IMM4BY2,0,0,0,0,0,0,0,"R_CKCORE_PCREL_IMM4BY2",0,0,0,0), |
| 144 | |
| 145 | /* 5. */ |
| 146 | HOWTO (R_CKCORE_PCREL32, /* type */ |
| 147 | 0, /* rightshift */ |
| 148 | 2, /* size */ |
| 149 | 32, /* bitsize */ |
| 150 | TRUE, /* pc_relative */ |
| 151 | 0, /* bitpos */ |
| 152 | complain_overflow_dont, /* complain_on_overflow */ |
| 153 | bfd_elf_generic_reloc, /* special_function */ |
| 154 | "R_CKCORE_PCREL32", /* name */ |
| 155 | FALSE, /* partial_inplace */ |
| 156 | 0x0, /* src_mask */ |
| 157 | 0xffffffff, /* dst_mask */ |
| 158 | TRUE), /* pcrel_offset */ |
| 159 | |
| 160 | /* 6: Only for csky v1. */ |
| 161 | HOWTO (R_CKCORE_PCREL_JSR_IMM11BY2, /* type */ |
| 162 | 1, /* rightshift */ |
| 163 | 1, /* size */ |
| 164 | 11, /* bitsize */ |
| 165 | TRUE, /* pc_relative */ |
| 166 | 0, /* bitpos */ |
| 167 | complain_overflow_signed, /* complain_on_overflow */ |
| 168 | bfd_elf_generic_reloc, /* special_function */ |
| 169 | "R_CKCORE_PCREL_JSR_IMM11BY2", /* name */ |
| 170 | FALSE, /* partial_inplace */ |
| 171 | 0x7ff, /* src_mask */ |
| 172 | 0x7ff, /* dst_mask */ |
| 173 | TRUE), /* pcrel_offset */ |
| 174 | |
| 175 | /* 7: GNU extension to record C++ vtable member usage. */ |
| 176 | HOWTO (R_CKCORE_GNU_VTENTRY, /* type */ |
| 177 | 0, /* rightshift */ |
| 178 | 2, /* size */ |
| 179 | 0, /* bitsize */ |
| 180 | FALSE, /* pc_relative */ |
| 181 | 0, /* bitpos */ |
| 182 | complain_overflow_dont, /* complain_on_overflow */ |
| 183 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| 184 | "R_CKCORE_GNU_VTENTRY", /* name */ |
| 185 | FALSE, /* partial_inplace */ |
| 186 | 0x0, /* src_mask */ |
| 187 | 0x0, /* dst_mask */ |
| 188 | FALSE), /* pcrel_offset */ |
| 189 | |
| 190 | /* 8: GNU extension to record C++ vtable hierarchy. */ |
| 191 | HOWTO (R_CKCORE_GNU_VTINHERIT, /* type */ |
| 192 | 0, /* rightshift */ |
| 193 | 2, /* size */ |
| 194 | 0, /* bitsize */ |
| 195 | FALSE, /* pc_relative */ |
| 196 | 0, /* bitpos */ |
| 197 | complain_overflow_dont, /* complain_on_overflow */ |
| 198 | NULL, /* special_function */ |
| 199 | "R_CKCORE_GNU_VTINHERIT", /* name */ |
| 200 | FALSE, /* partial_inplace */ |
| 201 | 0x0, /* src_mask */ |
| 202 | 0x0, /* dst_mask */ |
| 203 | FALSE), /* pcrel_offset */ |
| 204 | |
| 205 | /* 9. */ |
| 206 | HOWTO (R_CKCORE_RELATIVE, /* type */ |
| 207 | 0, /* rightshift */ |
| 208 | 2, /* size */ |
| 209 | 32, /* bitsize */ |
| 210 | FALSE, /* pc_relative */ |
| 211 | 0, /* bitpos */ |
| 212 | complain_overflow_signed, /* complain_on_overflow */ |
| 213 | bfd_elf_generic_reloc, /* special_function */ |
| 214 | "R_CKCORE_RELATIVE", /* name */ |
| 215 | TRUE, /* partial_inplace */ |
| 216 | 0x0, /* src_mask */ |
| 217 | 0xffffffff, /* dst_mask */ |
| 218 | FALSE), /* pcrel_offset */ |
| 219 | |
| 220 | /* 10: None. */ |
| 221 | /* FIXME: It is a bug that copy relocations are not implemented. */ |
| 222 | HOWTO (R_CKCORE_COPY, /* type */ |
| 223 | 0, /* rightshift */ |
| 224 | 2, /* size */ |
| 225 | 32, /* bitsize */ |
| 226 | FALSE, /* pc_relative */ |
| 227 | 0, /* bitpos */ |
| 228 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 229 | bfd_elf_generic_reloc, /* special_function */ |
| 230 | "R_CKCORE_COPY", /* name */ |
| 231 | TRUE, /* partial_inplace */ |
| 232 | 0xffffffff, /* src_mask */ |
| 233 | 0xffffffff, /* dst_mask */ |
| 234 | FALSE), /* pcrel_offset */ |
| 235 | |
| 236 | /* 11: None. */ |
| 237 | HOWTO (R_CKCORE_GLOB_DAT,0,0,0,0,0,0,0,"R_CKCORE_GLOB_DAT",0,0,0,0), |
| 238 | |
| 239 | /* 12: None. */ |
| 240 | HOWTO (R_CKCORE_JUMP_SLOT,0,0,0,0,0,0,0,"R_CKCORE_JUMP_SLOT",0,0,0,0), |
| 241 | |
| 242 | /* 13. */ |
| 243 | HOWTO (R_CKCORE_GOTOFF, /* type */ |
| 244 | 0, /* rightshift */ |
| 245 | 2, /* size */ |
| 246 | 32, /* bitsize */ |
| 247 | FALSE, /* pc_relative */ |
| 248 | 0, /* bitpos */ |
| 249 | complain_overflow_dont, /* complain_on_overflow */ |
| 250 | bfd_elf_generic_reloc, /* special_function */ |
| 251 | "R_CKCORE_GOTOFF", /* name */ |
| 252 | TRUE, /* partial_inplace */ |
| 253 | 0x0, /* src_mask */ |
| 254 | 0xffffffffl, /* dst_mask */ |
| 255 | FALSE), /* pcrel_offset */ |
| 256 | |
| 257 | /* 14. */ |
| 258 | HOWTO (R_CKCORE_GOTPC, /* type */ |
| 259 | 0, /* rightshift */ |
| 260 | 2, /* size */ |
| 261 | 32, /* bitsize */ |
| 262 | TRUE, /* pc_relative */ |
| 263 | 0, /* bitpos */ |
| 264 | complain_overflow_dont, /* complain_on_overflow */ |
| 265 | bfd_elf_generic_reloc, /* special_function */ |
| 266 | "R_CKCORE_GOTPC", /* name */ |
| 267 | TRUE, /* partial_inplace */ |
| 268 | 0x0, /* src_mask */ |
| 269 | 0xffffffff, /* dst_mask */ |
| 270 | FALSE), /* pcrel_offset */ |
| 271 | |
| 272 | /* 15. */ |
| 273 | HOWTO (R_CKCORE_GOT32, /* type */ |
| 274 | 0, /* rightshift */ |
| 275 | 2, /* size */ |
| 276 | 32, /* bitsize */ |
| 277 | FALSE, /* pc_relative */ |
| 278 | 0, /* bitpos */ |
| 279 | complain_overflow_dont, /* complain_on_overflow */ |
| 280 | bfd_elf_generic_reloc, /* special_function */ |
| 281 | "R_CKCORE_GOT32", /* name */ |
| 282 | TRUE, /* partial_inplace */ |
| 283 | 0x0, /* src_mask */ |
| 284 | 0xffffffff, /* dst_mask */ |
| 285 | TRUE), /* pcrel_offset */ |
| 286 | |
| 287 | /* 16. */ |
| 288 | HOWTO (R_CKCORE_PLT32, /* type */ |
| 289 | 0, /* rightshift */ |
| 290 | 2, /* size */ |
| 291 | 32, /* bitsize */ |
| 292 | FALSE, /* pc_relative */ |
| 293 | 0, /* bitpos */ |
| 294 | complain_overflow_dont, /* complain_on_overflow */ |
| 295 | bfd_elf_generic_reloc, /* special_function */ |
| 296 | "R_CKCORE_PLT32", /* name */ |
| 297 | TRUE, /* partial_inplace */ |
| 298 | 0x0, /* src_mask */ |
| 299 | 0xffffffff, /* dst_mask */ |
| 300 | TRUE), /* pcrel_offset */ |
| 301 | |
| 302 | /* 17: None. */ |
| 303 | HOWTO (R_CKCORE_ADDRGOT,0,0,0,0,0,0,0,"R_CKCORE_ADDRGOT",0,0,0,0), |
| 304 | |
| 305 | /* 18: None. */ |
| 306 | HOWTO (R_CKCORE_ADDRPLT,0,0,0,0,0,0,0,"R_CKCORE_ADDRPLT",0,0,0,0), |
| 307 | |
| 308 | /* 19: Only for csky v2. */ |
| 309 | HOWTO (R_CKCORE_PCREL_IMM26BY2, /* type */ |
| 310 | 1, /* rightshift */ |
| 311 | 2, /* size */ |
| 312 | 26, /* bitsize */ |
| 313 | TRUE, /* pc_relative */ |
| 314 | 0, /* bitpos */ |
| 315 | complain_overflow_signed, /* complain_on_overflow */ |
| 316 | bfd_elf_generic_reloc, /* special_function */ |
| 317 | "R_CKCORE_PCREL_IMM26BY2", /* name */ |
| 318 | FALSE, /* partial_inplace */ |
| 319 | 0x0, /* src_mask */ |
| 320 | 0x3ffffff, /* dst_mask */ |
| 321 | TRUE), /* pcrel_offset */ |
| 322 | |
| 323 | /* 20: Only for csky v2. */ |
| 324 | HOWTO (R_CKCORE_PCREL_IMM16BY2, /* type */ |
| 325 | 1, /* rightshift */ |
| 326 | 2, /* size */ |
| 327 | 16, /* bitsize */ |
| 328 | TRUE, /* pc_relative */ |
| 329 | 0, /* bitpos */ |
| 330 | complain_overflow_signed, /* complain_on_overflow */ |
| 331 | NULL, /* special_function */ |
| 332 | "R_CKCORE_PCREL_IMM16BY2", /* name */ |
| 333 | FALSE, /* partial_inplace */ |
| 334 | 0x0, /* src_mask */ |
| 335 | 0xffff, /* dst_mask */ |
| 336 | TRUE), /* pcrel_offset */ |
| 337 | |
| 338 | /* 21: Only for csky v2. */ |
| 339 | HOWTO (R_CKCORE_PCREL_IMM16BY4, /* type */ |
| 340 | 2, /* rightshift */ |
| 341 | 2, /* size */ |
| 342 | 16, /* bitsize */ |
| 343 | TRUE, /* pc_relative */ |
| 344 | 0, /* bitpos */ |
| 345 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 346 | NULL, /* special_function */ |
| 347 | "R_CKCORE_PCREL_IMM16BY4", /* name */ |
| 348 | FALSE, /* partial_inplace */ |
| 349 | 0xffff0000, /* src_mask */ |
| 350 | 0xffff, /* dst_mask */ |
| 351 | TRUE), /* pcrel_offset */ |
| 352 | |
| 353 | /* 22: Only for csky v2. */ |
| 354 | HOWTO (R_CKCORE_PCREL_IMM10BY2, /* type */ |
| 355 | 1, /* rightshift */ |
| 356 | 1, /* size */ |
| 357 | 10, /* bitsize */ |
| 358 | TRUE, /* pc_relative */ |
| 359 | 0, /* bitpos */ |
| 360 | complain_overflow_signed, /* complain_on_overflow */ |
| 361 | bfd_elf_generic_reloc, /* special_function */ |
| 362 | "R_CKCORE_PCREL_IMM10BY2", /* name */ |
| 363 | FALSE, /* partial_inplace */ |
| 364 | 0x0, /* src_mask */ |
| 365 | 0x3ff, /* dst_mask */ |
| 366 | TRUE), /* pcrel_offset */ |
| 367 | |
| 368 | /* 23: Only for csky v2. */ |
| 369 | HOWTO (R_CKCORE_PCREL_IMM10BY4, /* type */ |
| 370 | 2, /* rightshift */ |
| 371 | 2, /* size */ |
| 372 | 10, /* bitsize */ |
| 373 | TRUE, /* pc_relative */ |
| 374 | 0, /* bitpos */ |
| 375 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 376 | NULL, /* special_function */ |
| 377 | "R_CKCORE_PCREL_IMM10BY4", /* name */ |
| 378 | FALSE, /* partial_inplace */ |
| 379 | 0x0, /* src_mask */ |
| 380 | 0x3ff, /* dst_mask */ |
| 381 | TRUE), /* pcrel_offset */ |
| 382 | |
| 383 | /* 24: Only for csky v2. */ |
| 384 | HOWTO (R_CKCORE_ADDR_HI16, /* type */ |
| 385 | 16, /* rightshift */ |
| 386 | 2, /* size */ |
| 387 | 16, /* bitsize */ |
| 388 | FALSE, /* pc_relative */ |
| 389 | 0, /* bitpos */ |
| 390 | complain_overflow_dont, /* complain_on_overflow */ |
| 391 | bfd_elf_generic_reloc, /* special_function */ |
| 392 | "R_CKCORE_ADDR_HI16", /* name */ |
| 393 | FALSE, /* partial_inplace */ |
| 394 | 0x0, /* src_mask */ |
| 395 | 0xffff, /* dst_mask */ |
| 396 | FALSE), /* pcrel_offset */ |
| 397 | |
| 398 | /* 25. */ |
| 399 | HOWTO (R_CKCORE_ADDR_LO16, /* type */ |
| 400 | 0, /* rightshift */ |
| 401 | 2, /* size */ |
| 402 | 16, /* bitsize */ |
| 403 | FALSE, /* pc_relative */ |
| 404 | 0, /* bitpos */ |
| 405 | complain_overflow_dont, /* complain_on_overflow */ |
| 406 | bfd_elf_generic_reloc, /* special_function */ |
| 407 | "R_CKCORE_ADDR_LO16", /* name */ |
| 408 | FALSE, /* partial_inplace */ |
| 409 | 0x0, /* src_mask */ |
| 410 | 0xffff, /* dst_mask */ |
| 411 | FALSE), /* pcrel_offset */ |
| 412 | |
| 413 | /* 26. */ |
| 414 | HOWTO (R_CKCORE_GOTPC_HI16, /* type */ |
| 415 | 16, /* rightshift */ |
| 416 | 2, /* size */ |
| 417 | 16, /* bitsize */ |
| 418 | TRUE, /* pc_relative */ |
| 419 | 0, /* bitpos */ |
| 420 | complain_overflow_dont, /* complain_on_overflow */ |
| 421 | bfd_elf_generic_reloc, /* special_function */ |
| 422 | "R_CKCORE_GOTPC_HI16", /* name */ |
| 423 | FALSE, /* partial_inplace */ |
| 424 | 0x0, /* src_mask */ |
| 425 | 0xffff, /* dst_mask */ |
| 426 | FALSE), /* pcrel_offset */ |
| 427 | |
| 428 | /* 27. */ |
| 429 | HOWTO (R_CKCORE_GOTPC_LO16, /* type */ |
| 430 | 0, /* rightshift */ |
| 431 | 2, /* size */ |
| 432 | 16, /* bitsize */ |
| 433 | TRUE, /* pc_relative */ |
| 434 | 0, /* bitpos */ |
| 435 | complain_overflow_dont, /* complain_on_overflow */ |
| 436 | bfd_elf_generic_reloc, /* special_function */ |
| 437 | "R_CKCORE_GOTPC_LO16", /* name */ |
| 438 | FALSE, /* partial_inplace */ |
| 439 | 0x0, /* src_mask */ |
| 440 | 0xffff, /* dst_mask */ |
| 441 | FALSE), /* pcrel_offset */ |
| 442 | |
| 443 | /* 28. */ |
| 444 | HOWTO (R_CKCORE_GOTOFF_HI16, /* type */ |
| 445 | 16, /* rightshift */ |
| 446 | 2, /* size */ |
| 447 | 16, /* bitsize */ |
| 448 | FALSE, /* pc_relative */ |
| 449 | 0, /* bitpos */ |
| 450 | complain_overflow_dont, /* complain_on_overflow */ |
| 451 | bfd_elf_generic_reloc, /* special_function */ |
| 452 | "R_CKCORE_GOTOFF_HI16", /* name */ |
| 453 | FALSE, /* partial_inplace */ |
| 454 | 0x0, /* src_mask */ |
| 455 | 0xffff, /* dst_mask */ |
| 456 | FALSE), /* pcrel_offset */ |
| 457 | |
| 458 | /* 29. */ |
| 459 | HOWTO (R_CKCORE_GOTOFF_LO16, /* type */ |
| 460 | 0, /* rightshift */ |
| 461 | 2, /* size */ |
| 462 | 16, /* bitsize */ |
| 463 | FALSE, /* pc_relative */ |
| 464 | 0, /* bitpos */ |
| 465 | complain_overflow_dont, /* complain_on_overflow */ |
| 466 | bfd_elf_generic_reloc, /* special_function */ |
| 467 | "R_CKCORE_GOTOFF_LO16", /* name */ |
| 468 | FALSE, /* partial_inplace */ |
| 469 | 0x0, /* src_mask */ |
| 470 | 0xffff, /* dst_mask */ |
| 471 | FALSE), /* pcrel_offset */ |
| 472 | |
| 473 | /* 30. */ |
| 474 | HOWTO (R_CKCORE_GOT12, /* type */ |
| 475 | 2, /* rightshift */ |
| 476 | 2, /* size */ |
| 477 | 12, /* bitsize */ |
| 478 | FALSE, /* pc_relative */ |
| 479 | 0, /* bitpos */ |
| 480 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 481 | bfd_elf_generic_reloc, /* special_function */ |
| 482 | "R_CKCORE_GOT12", /* name */ |
| 483 | TRUE, /* partial_inplace */ |
| 484 | 0x0, /* src_mask */ |
| 485 | 0xfff, /* dst_mask */ |
| 486 | FALSE), /* pcrel_offset */ |
| 487 | |
| 488 | /* 31. */ |
| 489 | HOWTO (R_CKCORE_GOT_HI16, /* type */ |
| 490 | 16, /* rightshift */ |
| 491 | 2, /* size */ |
| 492 | 16, /* bitsize */ |
| 493 | FALSE, /* pc_relative */ |
| 494 | 0, /* bitpos */ |
| 495 | complain_overflow_dont, /* complain_on_overflow */ |
| 496 | bfd_elf_generic_reloc, /* special_function */ |
| 497 | "R_CKCORE_GOT_HI16", /* name */ |
| 498 | TRUE, /* partial_inplace */ |
| 499 | 0x0, /* src_mask */ |
| 500 | 0xffff, /* dst_mask */ |
| 501 | FALSE), /* pcrel_offset */ |
| 502 | |
| 503 | /* 32. */ |
| 504 | HOWTO (R_CKCORE_GOT_LO16, /* type */ |
| 505 | 0, /* rightshift */ |
| 506 | 2, /* size */ |
| 507 | 16, /* bitsize */ |
| 508 | FALSE, /* pc_relative */ |
| 509 | 0, /* bitpos */ |
| 510 | complain_overflow_dont, /* complain_on_overflow */ |
| 511 | bfd_elf_generic_reloc, /* special_function */ |
| 512 | "R_CKCORE_GOT_LO16", /* name */ |
| 513 | TRUE, /* partial_inplace */ |
| 514 | 0x0, /* src_mask */ |
| 515 | 0xffff, /* dst_mask */ |
| 516 | FALSE), /* pcrel_offset */ |
| 517 | |
| 518 | /* 33. */ |
| 519 | HOWTO (R_CKCORE_PLT12, /* type */ |
| 520 | 2, /* rightshift */ |
| 521 | 2, /* size */ |
| 522 | 12, /* bitsize */ |
| 523 | FALSE, /* pc_relative */ |
| 524 | 0, /* bitpos */ |
| 525 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 526 | bfd_elf_generic_reloc, /* special_function */ |
| 527 | "R_CKCORE_PLT12", /* name */ |
| 528 | TRUE, /* partial_inplace */ |
| 529 | 0x0, /* src_mask */ |
| 530 | 0xfff, /* dst_mask */ |
| 531 | FALSE), /* pcrel_offset */ |
| 532 | |
| 533 | /* 34. */ |
| 534 | HOWTO (R_CKCORE_PLT_HI16, /* type */ |
| 535 | 16, /* rightshift */ |
| 536 | 2, /* size */ |
| 537 | 16, /* bitsize */ |
| 538 | FALSE, /* pc_relative */ |
| 539 | 0, /* bitpos */ |
| 540 | complain_overflow_dont, /* complain_on_overflow */ |
| 541 | bfd_elf_generic_reloc, /* special_function */ |
| 542 | "R_CKCORE_PLT_HI16", /* name */ |
| 543 | TRUE, /* partial_inplace */ |
| 544 | 0x0, /* src_mask */ |
| 545 | 0xffff, /* dst_mask */ |
| 546 | FALSE), /* pcrel_offset */ |
| 547 | |
| 548 | /* 35. */ |
| 549 | HOWTO (R_CKCORE_PLT_LO16, /* type */ |
| 550 | 0, /* rightshift */ |
| 551 | 2, /* size */ |
| 552 | 16, /* bitsize */ |
| 553 | FALSE, /* pc_relative */ |
| 554 | 0, /* bitpos */ |
| 555 | complain_overflow_dont, /* complain_on_overflow */ |
| 556 | bfd_elf_generic_reloc, /* special_function */ |
| 557 | "R_CKCORE_PLT_LO16", /* name */ |
| 558 | TRUE, /* partial_inplace */ |
| 559 | 0x0, /* src_mask */ |
| 560 | 0xffff, /* dst_mask */ |
| 561 | FALSE), /* pcrel_offset */ |
| 562 | |
| 563 | /* 36: None. */ |
| 564 | HOWTO (R_CKCORE_ADDRGOT_HI16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0), |
| 565 | |
| 566 | /* 37: None. */ |
| 567 | HOWTO (R_CKCORE_ADDRGOT_LO16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0), |
| 568 | |
| 569 | /* 38: None. */ |
| 570 | HOWTO (R_CKCORE_ADDRPLT_HI16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0), |
| 571 | |
| 572 | /* 39: None. */ |
| 573 | HOWTO (R_CKCORE_ADDRPLT_LO16,0,0,0,0,0,0,0,"R_CKCORE_",0,0,0,0), |
| 574 | |
| 575 | /* 40. */ |
| 576 | HOWTO (R_CKCORE_PCREL_JSR_IMM26BY2, /* type */ |
| 577 | 1, /* rightshift */ |
| 578 | 2, /* size */ |
| 579 | 26, /* bitsize */ |
| 580 | TRUE, /* pc_relative */ |
| 581 | 0, /* bitpos */ |
| 582 | complain_overflow_signed, /* complain_on_overflow */ |
| 583 | bfd_elf_generic_reloc, /* special_function */ |
| 584 | "R_CKCORE_PCREL_JSR_IMM26BY2", /* name */ |
| 585 | FALSE, /* partial_inplace */ |
| 586 | 0x0, /* src_mask */ |
| 587 | 0x3ffffff, /* dst_mask */ |
| 588 | TRUE), /* pcrel_offset */ |
| 589 | |
| 590 | /* 41. */ |
| 591 | HOWTO (R_CKCORE_TOFFSET_LO16, /* type */ |
| 592 | 0, /* rightshift */ |
| 593 | 2, /* size */ |
| 594 | 16, /* bitsize */ |
| 595 | FALSE, /* pc_relative */ |
| 596 | 0, /* bitpos */ |
| 597 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 598 | NULL, /* special_function */ |
| 599 | "R_CKCORE_TOFFSET_LO16", /* name */ |
| 600 | FALSE, /* partial_inplace */ |
| 601 | 0x0, /* src_mask */ |
| 602 | 0xffff, /* dst_mask */ |
| 603 | FALSE), /* pcrel_offset */ |
| 604 | |
| 605 | /* 42. */ |
| 606 | HOWTO (R_CKCORE_DOFFSET_LO16, /* type */ |
| 607 | 0, /* rightshift */ |
| 608 | 2, /* size */ |
| 609 | 16, /* bitsize */ |
| 610 | FALSE, /* pc_relative */ |
| 611 | 0, /* bitpos */ |
| 612 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 613 | NULL, /* special_function */ |
| 614 | "R_CKCORE_DOFFSET_LO16", /* name */ |
| 615 | FALSE, /* partial_inplace */ |
| 616 | 0x0, /* src_mask */ |
| 617 | 0xffff, /* dst_mask */ |
| 618 | FALSE), /* pcrel_offset */ |
| 619 | |
| 620 | /* 43. */ |
| 621 | HOWTO (R_CKCORE_PCREL_IMM18BY2, /* type */ |
| 622 | 1, /* rightshift */ |
| 623 | 2, /* size */ |
| 624 | 18, /* bitsize */ |
| 625 | TRUE, /* pc_relative */ |
| 626 | 0, /* bitpos */ |
| 627 | complain_overflow_signed, /* complain_on_overflow */ |
| 628 | NULL, /* special_function */ |
| 629 | "R_CKCORE_PCREL_IMM18BY2", /* name */ |
| 630 | FALSE, /* partial_inplace */ |
| 631 | 0x0, /* src_mask */ |
| 632 | 0x3ffff, /* dst_mask */ |
| 633 | TRUE), /* pcrel_offset */ |
| 634 | |
| 635 | /* 44. */ |
| 636 | HOWTO (R_CKCORE_DOFFSET_IMM18, /* type */ |
| 637 | 0, /* rightshift */ |
| 638 | 2, /* size */ |
| 639 | 18, /* bitsize */ |
| 640 | FALSE, /* pc_relative */ |
| 641 | 0, /* bitpos */ |
| 642 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 643 | NULL, /* special_function */ |
| 644 | "R_CKCORE_DOFFSET_IMM18", /* name */ |
| 645 | FALSE, /* partial_inplace */ |
| 646 | 0x0, /* src_mask */ |
| 647 | 0x3ffff, /* dst_mask */ |
| 648 | FALSE), /* pcrel_offset */ |
| 649 | |
| 650 | /* 45. */ |
| 651 | HOWTO (R_CKCORE_DOFFSET_IMM18BY2, /* type */ |
| 652 | 1, /* rightshift */ |
| 653 | 2, /* size */ |
| 654 | 18, /* bitsize */ |
| 655 | FALSE, /* pc_relative */ |
| 656 | 0, /* bitpos */ |
| 657 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 658 | NULL, /* special_function */ |
| 659 | "R_CKCORE_DOFFSET_IMM18BY2", /* name */ |
| 660 | FALSE, /* partial_inplace */ |
| 661 | 0x0, /* src_mask */ |
| 662 | 0x3ffff, /* dst_mask */ |
| 663 | FALSE), /* pcrel_offset */ |
| 664 | |
| 665 | /* 46. */ |
| 666 | HOWTO (R_CKCORE_DOFFSET_IMM18BY4, /* type */ |
| 667 | 2, /* rightshift */ |
| 668 | 2, /* size */ |
| 669 | 18, /* bitsize */ |
| 670 | FALSE, /* pc_relative */ |
| 671 | 0, /* bitpos */ |
| 672 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 673 | NULL, /* special_function */ |
| 674 | "R_CKCORE_DOFFSET_IMM18BY4", /* name */ |
| 675 | FALSE, /* partial_inplace */ |
| 676 | 0x0, /* src_mask */ |
| 677 | 0x3ffff, /* dst_mask */ |
| 678 | FALSE), /* pcrel_offset */ |
| 679 | |
| 680 | /* 47. */ |
| 681 | HOWTO (R_CKCORE_GOTOFF_IMM18, /* type */ |
| 682 | 0, /* rightshift */ |
| 683 | 2, /* size */ |
| 684 | 18, /* bitsize */ |
| 685 | FALSE, /* pc_relative */ |
| 686 | 0, /* bitpos */ |
| 687 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 688 | bfd_elf_generic_reloc, /* special_function */ |
| 689 | "R_CKCORE_GOTOFF_IMM18", /* name */ |
| 690 | TRUE, /* partial_inplace */ |
| 691 | 0xfffc, /* src_mask */ |
| 692 | 0x3ffff, /* dst_mask */ |
| 693 | FALSE), /* pcrel_offset */ |
| 694 | |
| 695 | /* 48. */ |
| 696 | HOWTO (R_CKCORE_GOT_IMM18BY4, /* type */ |
| 697 | 2, /* rightshift */ |
| 698 | 2, /* size */ |
| 699 | 18, /* bitsize */ |
| 700 | FALSE, /* pc_relative */ |
| 701 | 0, /* bitpos */ |
| 702 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 703 | bfd_elf_generic_reloc, /* special_function */ |
| 704 | "R_CKCORE_GOT_IMM18BY4", /* name */ |
| 705 | TRUE, /* partial_inplace */ |
| 706 | 0xfffc, /* src_mask */ |
| 707 | 0x3ffff, /* dst_mask */ |
| 708 | FALSE), /* pcrel_offset */ |
| 709 | |
| 710 | /* 49. */ |
| 711 | HOWTO (R_CKCORE_PLT_IMM18BY4, /* type */ |
| 712 | 2, /* rightshift */ |
| 713 | 2, /* size */ |
| 714 | 18, /* bitsize */ |
| 715 | FALSE, /* pc_relative */ |
| 716 | 0, /* bitpos */ |
| 717 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 718 | bfd_elf_generic_reloc, /* special_function */ |
| 719 | "R_CKCORE_PLT_IMM18BY4", /* name */ |
| 720 | TRUE, /* partial_inplace */ |
| 721 | 0xfffc, /* src_mask */ |
| 722 | 0x3ffff, /* dst_mask */ |
| 723 | TRUE), /* pcrel_offset */ |
| 724 | |
| 725 | /* 50: for lrw16. */ |
| 726 | HOWTO (R_CKCORE_PCREL_IMM7BY4, /* type */ |
| 727 | 2, /* rightshift */ |
| 728 | 1, /* size */ |
| 729 | 7, /* bitsize */ |
| 730 | TRUE, /* pc_relative */ |
| 731 | 0, /* bitpos */ |
| 732 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 733 | bfd_elf_generic_reloc, /* special_function */ |
| 734 | "R_CKCORE_PCREL_IMM7BY4", /* name */ |
| 735 | FALSE, /* partial_inplace */ |
| 736 | 0xec1f, /* src_mask */ |
| 737 | 0x31f, /* dst_mask */ |
| 738 | TRUE), /* pcrel_offset */ |
| 739 | |
| 740 | /* 51: for static nptl. */ |
| 741 | HOWTO (R_CKCORE_TLS_LE32, /* type */ |
| 742 | 0, /* rightshift */ |
| 743 | 2, /* size */ |
| 744 | 32, /* bitsize */ |
| 745 | FALSE, /* pc_relative */ |
| 746 | 0, /* bitpos */ |
| 747 | complain_overflow_dont, /* complain_on_overflow */ |
| 748 | bfd_elf_generic_reloc, /* special_function */ |
| 749 | "R_CKCORE_TLS_LE32", /* name */ |
| 750 | FALSE, /* partial_inplace */ |
| 751 | 0x0, /* src_mask */ |
| 752 | 0xffffffff, /* dst_mask */ |
| 753 | TRUE), /* pcrel_offset */ |
| 754 | |
| 755 | /* 52: for static nptl. */ |
| 756 | HOWTO (R_CKCORE_TLS_IE32, /* type */ |
| 757 | 0, /* rightshift */ |
| 758 | 2, /* size */ |
| 759 | 32, /* bitsize */ |
| 760 | FALSE, /* pc_relative */ |
| 761 | 0, /* bitpos */ |
| 762 | complain_overflow_dont, /* complain_on_overflow */ |
| 763 | bfd_elf_generic_reloc, /* special_function */ |
| 764 | "R_CKCORE_TLS_IE32", /* name */ |
| 765 | FALSE, /* partial_inplace */ |
| 766 | 0x0, /* src_mask */ |
| 767 | 0xffffffff, /* dst_mask */ |
| 768 | TRUE), /* pcrel_offset */ |
| 769 | |
| 770 | /* 53: for pic nptl. */ |
| 771 | HOWTO (R_CKCORE_TLS_GD32, /* type */ |
| 772 | 0, /* rightshift */ |
| 773 | 2, /* size */ |
| 774 | 32, /* bitsize */ |
| 775 | FALSE, /* pc_relative */ |
| 776 | 0, /* bitpos */ |
| 777 | complain_overflow_dont, /* complain_on_overflow */ |
| 778 | bfd_elf_generic_reloc, /* special_function */ |
| 779 | "R_CKCORE_TLS_GD32", /* name */ |
| 780 | FALSE, /* partial_inplace */ |
| 781 | 0x0, /* src_mask */ |
| 782 | 0xffffffff, /* dst_mask */ |
| 783 | TRUE), /* pcrel_offset */ |
| 784 | |
| 785 | /* 54: for pic nptl. */ |
| 786 | HOWTO (R_CKCORE_TLS_LDM32, /* type */ |
| 787 | 0, /* rightshift */ |
| 788 | 2, /* size */ |
| 789 | 32, /* bitsize */ |
| 790 | FALSE, /* pc_relative */ |
| 791 | 0, /* bitpos */ |
| 792 | complain_overflow_dont, /* complain_on_overflow */ |
| 793 | bfd_elf_generic_reloc, /* special_function */ |
| 794 | "R_CKCORE_TLS_LDM32", /* name */ |
| 795 | FALSE, /* partial_inplace */ |
| 796 | 0x0, /* src_mask */ |
| 797 | 0xffffffff, /* dst_mask */ |
| 798 | TRUE), /* pcrel_offset */ |
| 799 | |
| 800 | /* 55: for pic nptl. */ |
| 801 | HOWTO (R_CKCORE_TLS_LDO32, /* type */ |
| 802 | 0, /* rightshift */ |
| 803 | 2, /* size */ |
| 804 | 32, /* bitsize */ |
| 805 | FALSE, /* pc_relative */ |
| 806 | 0, /* bitpos */ |
| 807 | complain_overflow_dont, /* complain_on_overflow */ |
| 808 | bfd_elf_generic_reloc, /* special_function */ |
| 809 | "R_CKCORE_TLS_LDO32", /* name */ |
| 810 | FALSE, /* partial_inplace */ |
| 811 | 0x0, /* src_mask */ |
| 812 | 0xffffffff, /* dst_mask */ |
| 813 | TRUE), /* pcrel_offset */ |
| 814 | |
| 815 | /* 56: for linker. */ |
| 816 | HOWTO (R_CKCORE_TLS_DTPMOD32,0,0,0,0,0,0,0,"R_CKCORE_TLS_DTPMOD32",0,0,0,0), |
| 817 | |
| 818 | /* 57: for linker. */ |
| 819 | HOWTO (R_CKCORE_TLS_DTPOFF32,0,0,0,0,0,0,0,"R_CKCORE_TLS_DTPOFF32",0,0,0,0), |
| 820 | |
| 821 | /* 58: for linker. */ |
| 822 | HOWTO (R_CKCORE_TLS_TPOFF32,0,0,0,0,0,0,0,"R_CKCORE_TLS_TPOFF32",0,0,0,0), |
| 823 | |
| 824 | /* 59: for ck807f. */ |
| 825 | HOWTO (R_CKCORE_PCREL_FLRW_IMM8BY4, /* type */ |
| 826 | 2, /* rightshift */ |
| 827 | 2, /* size */ |
| 828 | 8, /* bitsize */ |
| 829 | TRUE, /* pc_relative */ |
| 830 | 0, /* bitpos */ |
| 831 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 832 | NULL, /* special_function */ |
| 833 | "R_CKCORE_PCREL_FLRW_IMM8BY4", /* name */ |
| 834 | FALSE, /* partial_inplace */ |
| 835 | 0xfe1fff0f, /* src_mask */ |
| 836 | 0x1e000f0, /* dst_mask */ |
| 837 | TRUE), /* pcrel_offset */ |
| 838 | |
| 839 | /* 60: for 810 not to generate jsri. */ |
| 840 | HOWTO (R_CKCORE_NOJSRI, /* type */ |
| 841 | 0, /* rightshift */ |
| 842 | 2, /* size */ |
| 843 | 32, /* bitsize */ |
| 844 | FALSE, /* pc_relative */ |
| 845 | 0, /* bitpos */ |
| 846 | complain_overflow_dont, /* complain_on_overflow */ |
| 847 | bfd_elf_generic_reloc, /* special_function */ |
| 848 | "R_CKCORE_NOJSRI", /* name */ |
| 849 | FALSE, /* partial_inplace */ |
| 850 | 0xffff, /* src_mask */ |
| 851 | 0xffff, /* dst_mask */ |
| 852 | FALSE), /* pcrel_offset */ |
| 853 | |
| 854 | /* 61: for callgraph. */ |
| 855 | HOWTO (R_CKCORE_CALLGRAPH, /* type */ |
| 856 | 0, /* rightshift */ |
| 857 | 0, /* size */ |
| 858 | 0, /* bitsize */ |
| 859 | FALSE, /* pc_relative */ |
| 860 | 0, /* bitpos */ |
| 861 | complain_overflow_dont, /* complain_on_overflow */ |
| 862 | NULL, /* special_function */ |
| 863 | "R_CKCORE_CALLGRAPH", /* name */ |
| 864 | FALSE, /* partial_inplace */ |
| 865 | 0x0, /* src_mask */ |
| 866 | 0x0, /* dst_mask */ |
| 867 | TRUE), /* pcrel_offset */ |
| 868 | |
| 869 | /* 62: IRELATIVE*/ |
| 870 | HOWTO (R_CKCORE_IRELATIVE,0,0,0,0,0,0,0,"R_CKCORE_IRELATIVE",0,0,0,0), |
| 871 | |
| 872 | /* 63: for bloop instruction */ |
| 873 | HOWTO (R_CKCORE_PCREL_BLOOP_IMM4BY4, /* type */ |
| 874 | 1, /* rightshift */ |
| 875 | 2, /* size */ |
| 876 | 4, /* bitsize */ |
| 877 | 1, /* pc_relative */ |
| 878 | 0, /* bitpos */ |
| 879 | complain_overflow_signed, /* complain_on_overflow */ |
| 880 | bfd_elf_generic_reloc, /* special_function */ |
| 881 | "R_CKCORE_PCREL_BLOOP_IMM4BY4", /* name */ |
| 882 | FALSE, /* partial_inplace */ |
| 883 | 0x0, /* src_mask */ |
| 884 | 0xf, /* dst_mask */ |
| 885 | TRUE), /* pcrel_offset */ |
| 886 | /* 64: for bloop instruction */ |
| 887 | HOWTO (R_CKCORE_PCREL_BLOOP_IMM12BY4, /* type */ |
| 888 | 1, /* rightshift */ |
| 889 | 2, /* size */ |
| 890 | 12, /* bitsize */ |
| 891 | 1, /* pc_relative */ |
| 892 | 0, /* bitpos */ |
| 893 | complain_overflow_signed, /* complain_on_overflow */ |
| 894 | bfd_elf_generic_reloc, /* special_function */ |
| 895 | "R_CKCORE_PCREL_BLOOP_IMM12BY4", /* name */ |
| 896 | FALSE, /* partial_inplace */ |
| 897 | 0x0, /* src_mask */ |
| 898 | 0xfff, /* dst_mask */ |
| 899 | TRUE), /* pcrel_offset */ |
| 900 | |
| 901 | |
| 902 | }; |
| 903 | |
| 904 | |
| 905 | /* Whether GOT overflow checking is needed. */ |
| 906 | static int check_got_overflow = 0; |
| 907 | |
| 908 | /* Whether the target 32 bits is forced so that the high |
| 909 | 16 bits is at the low address. */ |
| 910 | static int need_reverse_bits; |
| 911 | |
| 912 | /* Used for relaxation. See csky_relocate_contents. */ |
| 913 | static bfd_vma read_content_substitute; |
| 914 | |
| 915 | /* NOTICE! |
| 916 | The way the following two look-up functions work demands |
| 917 | that BFD_RELOC_CKCORE_xxx are defined contiguously. */ |
| 918 | |
| 919 | static reloc_howto_type * |
| 920 | csky_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 921 | bfd_reloc_code_real_type code) |
| 922 | { |
| 923 | int csky_code = code - BFD_RELOC_CKCORE_NONE; |
| 924 | |
| 925 | if (csky_code < 0 || csky_code >= R_CKCORE_MAX) |
| 926 | { |
| 927 | switch (code) |
| 928 | { |
| 929 | case BFD_RELOC_NONE: |
| 930 | csky_code = R_CKCORE_NONE; |
| 931 | break; |
| 932 | case BFD_RELOC_32: |
| 933 | csky_code = R_CKCORE_ADDR32; |
| 934 | break; |
| 935 | case BFD_RELOC_32_PCREL: |
| 936 | csky_code = R_CKCORE_PCREL32; |
| 937 | break; |
| 938 | case BFD_RELOC_VTABLE_INHERIT: |
| 939 | csky_code = R_CKCORE_GNU_VTINHERIT; |
| 940 | break; |
| 941 | case BFD_RELOC_VTABLE_ENTRY: |
| 942 | csky_code = R_CKCORE_GNU_VTENTRY; |
| 943 | break; |
| 944 | case BFD_RELOC_RVA: |
| 945 | csky_code = R_CKCORE_RELATIVE; |
| 946 | break; |
| 947 | default: |
| 948 | return (reloc_howto_type *)NULL; |
| 949 | } |
| 950 | } |
| 951 | /* Note: when adding csky bfd reloc types in bfd-in2.h |
| 952 | and csky elf reloc types in elf/csky.h, |
| 953 | the order of the two reloc type tables should be consistent. */ |
| 954 | return &csky_elf_howto_table[csky_code]; |
| 955 | } |
| 956 | |
| 957 | static reloc_howto_type * |
| 958 | csky_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 959 | const char *r_name) |
| 960 | { |
| 961 | unsigned int i; |
| 962 | for (i = 0; i < R_CKCORE_MAX; i++) |
| 963 | if (strcasecmp (csky_elf_howto_table[i].name, r_name) == 0) |
| 964 | return &csky_elf_howto_table[i]; |
| 965 | return NULL; |
| 966 | } |
| 967 | |
| 968 | static reloc_howto_type * |
| 969 | elf32_csky_howto_from_type (unsigned int r_type) |
| 970 | { |
| 971 | if (r_type < R_CKCORE_MAX) |
| 972 | return &csky_elf_howto_table[r_type]; |
| 973 | else |
| 974 | return NULL; |
| 975 | } |
| 976 | |
| 977 | static bfd_boolean |
| 978 | csky_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 979 | arelent *cache_ptr, |
| 980 | Elf_Internal_Rela *dst) |
| 981 | { |
| 982 | unsigned int r_type; |
| 983 | |
| 984 | r_type = ELF32_R_TYPE (dst->r_info); |
| 985 | cache_ptr->howto = elf32_csky_howto_from_type (r_type); |
| 986 | if (cache_ptr->howto == NULL) |
| 987 | { |
| 988 | /* xgettext:c-format */ |
| 989 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 990 | abfd, r_type); |
| 991 | bfd_set_error (bfd_error_bad_value); |
| 992 | return FALSE; |
| 993 | } |
| 994 | return TRUE; |
| 995 | } |
| 996 | |
| 997 | /* The Global Offset Table max size. */ |
| 998 | #define GOT_MAX_SIZE 0xFFFF8 |
| 999 | |
| 1000 | /* The name of the dynamic interpreter. This is put in the .interp |
| 1001 | section. */ |
| 1002 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 1003 | |
| 1004 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 1005 | #define PLT_ENTRY_SIZE 12 |
| 1006 | #define PLT_ENTRY_SIZE_P 16 |
| 1007 | |
| 1008 | /* The first entry in a procedure linkage table looks like |
| 1009 | this. It is set up so that any shared library function that is |
| 1010 | called before the relocation has been set up calls the dynamic |
| 1011 | linker first. */ |
| 1012 | static const bfd_vma csky_elf_plt_entry_v2[PLT_ENTRY_SIZE / 4] = |
| 1013 | { |
| 1014 | 0xd99c2002, /* ldw r12, (gb, 8) */ |
| 1015 | 0xea0d0000, /* movi r13,offset */ |
| 1016 | 0xe8cc0000 /* jmp r12 */ |
| 1017 | }; |
| 1018 | |
| 1019 | static const bfd_vma csky_elf_plt_entry_v1[PLT_ENTRY_SIZE / 2 ] = |
| 1020 | { |
| 1021 | 0x25f0, /* subi r0, 32 */ |
| 1022 | 0x9200, /* stw r2, (r0, 0) */ |
| 1023 | 0x9310, /* stw r3, (r0, 4) */ |
| 1024 | 0x822e, /* ldw r2, (gb, 8) */ |
| 1025 | 0x7301, /* lrw r3, #offset */ |
| 1026 | 0x00c2, /* jmp r2 */ |
| 1027 | }; |
| 1028 | |
| 1029 | /* Branch stub support. */ |
| 1030 | |
| 1031 | enum stub_insn_type |
| 1032 | { |
| 1033 | INSN16, |
| 1034 | INSN32, |
| 1035 | DATA_TYPE |
| 1036 | }; |
| 1037 | |
| 1038 | bfd_boolean use_branch_stub = TRUE; |
| 1039 | typedef struct |
| 1040 | { |
| 1041 | bfd_vma data; |
| 1042 | enum stub_insn_type type; |
| 1043 | unsigned int r_type; |
| 1044 | int reloc_addend; |
| 1045 | } insn_sequence; |
| 1046 | |
| 1047 | static const insn_sequence elf32_csky_stub_long_branch[] = |
| 1048 | { |
| 1049 | {0xea8d0002, INSN32, R_CKCORE_NONE, 0x0}, /* lrw t1,[pc+8] */ |
| 1050 | {0x7834, INSN16, R_CKCORE_NONE, 0x0}, /* jmp t1 */ |
| 1051 | {0x6c03, INSN16, R_CKCORE_NONE, 0x0}, /* nop */ |
| 1052 | {0x0, DATA_TYPE, R_CKCORE_ADDR32, 0x0} /* .long addr */ |
| 1053 | }; |
| 1054 | |
| 1055 | static const insn_sequence elf32_csky_stub_long_branch_jmpi[] = |
| 1056 | { |
| 1057 | {0xeac00001, INSN32, R_CKCORE_NONE, 0x0}, /* jmpi [pc+4] */ |
| 1058 | {0x0, DATA_TYPE, R_CKCORE_ADDR32, 0x0} /* .long addr */ |
| 1059 | }; |
| 1060 | |
| 1061 | /* The bsr instruction offset limit. */ |
| 1062 | #define BSR_MAX_FWD_BRANCH_OFFSET (((1 << 25) - 1) << 1) |
| 1063 | #define BSR_MAX_BWD_BRANCH_OFFSET (-(1 << 26)) |
| 1064 | |
| 1065 | #define STUB_SUFFIX ".stub" |
| 1066 | #define STUB_ENTRY_NAME "__%s_veneer" |
| 1067 | |
| 1068 | /* One entry per long/short branch stub defined above. */ |
| 1069 | #define DEF_STUBS \ |
| 1070 | DEF_STUB(long_branch) \ |
| 1071 | DEF_STUB(long_branch_jmpi) |
| 1072 | |
| 1073 | #define DEF_STUB(x) csky_stub_##x, |
| 1074 | enum elf32_csky_stub_type |
| 1075 | { |
| 1076 | csky_stub_none, |
| 1077 | DEF_STUBS |
| 1078 | }; |
| 1079 | #undef DEF_STUB |
| 1080 | |
| 1081 | typedef struct |
| 1082 | { |
| 1083 | const insn_sequence* template_sequence; |
| 1084 | int template_size; |
| 1085 | } stub_def; |
| 1086 | |
| 1087 | #define DEF_STUB(x) {elf32_csky_stub_##x, ARRAY_SIZE(elf32_csky_stub_##x)}, |
| 1088 | static const stub_def stub_definitions[] = { |
| 1089 | {NULL, 0}, |
| 1090 | DEF_STUBS |
| 1091 | }; |
| 1092 | |
| 1093 | /* The size of the thread control block. */ |
| 1094 | #define TCB_SIZE 8 |
| 1095 | |
| 1096 | struct csky_elf_obj_tdata |
| 1097 | { |
| 1098 | struct elf_obj_tdata root; |
| 1099 | |
| 1100 | /* tls_type for each local got entry. */ |
| 1101 | char *local_got_tls_type; |
| 1102 | }; |
| 1103 | |
| 1104 | #define csky_elf_local_got_tls_type(bfd) \ |
| 1105 | (csky_elf_tdata (bfd)->local_got_tls_type) |
| 1106 | |
| 1107 | #define csky_elf_tdata(bfd) \ |
| 1108 | ((struct csky_elf_obj_tdata *) (bfd)->tdata.any) |
| 1109 | |
| 1110 | struct elf32_csky_stub_hash_entry |
| 1111 | { |
| 1112 | /* Base hash table entry structure. */ |
| 1113 | struct bfd_hash_entry root; |
| 1114 | |
| 1115 | /* The stub section. */ |
| 1116 | asection *stub_sec; |
| 1117 | |
| 1118 | /* Offset within stub_sec of the beginning of this stub. */ |
| 1119 | bfd_vma stub_offset; |
| 1120 | |
| 1121 | /* Given the symbol's value and its section we can determine its final |
| 1122 | value when building the stubs (so the stub knows where to jump). */ |
| 1123 | bfd_vma target_value; |
| 1124 | asection *target_section; |
| 1125 | |
| 1126 | /* Offset to apply to relocation referencing target_value. */ |
| 1127 | bfd_vma target_addend; |
| 1128 | |
| 1129 | /* The stub type. */ |
| 1130 | enum elf32_csky_stub_type stub_type; |
| 1131 | /* Its encoding size in bytes. */ |
| 1132 | int stub_size; |
| 1133 | /* Its template. */ |
| 1134 | const insn_sequence *stub_template; |
| 1135 | /* The size of the template (number of entries). */ |
| 1136 | int stub_template_size; |
| 1137 | |
| 1138 | /* The symbol table entry, if any, that this was derived from. */ |
| 1139 | struct csky_elf_link_hash_entry *h; |
| 1140 | |
| 1141 | /* Destination symbol type. */ |
| 1142 | unsigned char st_type; |
| 1143 | |
| 1144 | /* Where this stub is being called from, or, in the case of combined |
| 1145 | stub sections, the first input section in the group. */ |
| 1146 | asection *id_sec; |
| 1147 | |
| 1148 | /* The name for the local symbol at the start of this stub. The |
| 1149 | stub name in the hash table has to be unique; this does not, so |
| 1150 | it can be friendlier. */ |
| 1151 | char *output_name; |
| 1152 | }; |
| 1153 | |
| 1154 | #define csky_stub_hash_lookup(table, string, create, copy) \ |
| 1155 | ((struct elf32_csky_stub_hash_entry *) \ |
| 1156 | bfd_hash_lookup ((table), (string), (create), (copy))) |
| 1157 | |
| 1158 | /* C-SKY ELF linker hash entry. */ |
| 1159 | struct csky_elf_link_hash_entry |
| 1160 | { |
| 1161 | struct elf_link_hash_entry elf; |
| 1162 | int plt_refcount; |
| 1163 | /* For sub jsri2bsr relocs count. */ |
| 1164 | int jsri2bsr_refcount; |
| 1165 | /* Track dynamic relocs copied for this symbol. */ |
| 1166 | struct elf_dyn_relocs *dyn_relocs; |
| 1167 | |
| 1168 | #define GOT_UNKNOWN 0 |
| 1169 | #define GOT_NORMAL 1 |
| 1170 | #define GOT_TLS_GD 2 |
| 1171 | #define GOT_TLS_IE 4 |
| 1172 | |
| 1173 | unsigned char tls_type; |
| 1174 | |
| 1175 | /* A pointer to the most recently used stub hash entry against this |
| 1176 | symbol. */ |
| 1177 | struct elf32_csky_stub_hash_entry *stub_cache; |
| 1178 | }; |
| 1179 | |
| 1180 | /* Traverse an C-SKY ELF linker hash table. */ |
| 1181 | #define csky_elf_link_hash_traverse(table, func, info) \ |
| 1182 | (elf_link_hash_traverse \ |
| 1183 | (&(table)->root, \ |
| 1184 | (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ |
| 1185 | (info))) |
| 1186 | |
| 1187 | /* Get the C-SKY ELF linker hash table from a link_info structure. */ |
| 1188 | #define csky_elf_hash_table(info) \ |
| 1189 | ((elf_hash_table_id ((struct elf_link_hash_table *) ((info)->hash)) \ |
| 1190 | == CSKY_ELF_DATA) \ |
| 1191 | ? ((struct csky_elf_link_hash_table *) ((info)->hash)) \ |
| 1192 | : NULL) |
| 1193 | |
| 1194 | #define csky_elf_hash_entry(ent) ((struct csky_elf_link_hash_entry*)(ent)) |
| 1195 | |
| 1196 | /* Array to keep track of which stub sections have been created, and |
| 1197 | information on stub grouping. */ |
| 1198 | struct map_stub |
| 1199 | { |
| 1200 | /* This is the section to which stubs in the group will be |
| 1201 | attached. */ |
| 1202 | asection *link_sec; |
| 1203 | /* The stub section. */ |
| 1204 | asection *stub_sec; |
| 1205 | }; |
| 1206 | |
| 1207 | /* C-SKY ELF linker hash table. */ |
| 1208 | struct csky_elf_link_hash_table |
| 1209 | { |
| 1210 | struct elf_link_hash_table elf; |
| 1211 | |
| 1212 | /* Small local sym cache. */ |
| 1213 | struct sym_cache sym_cache; |
| 1214 | |
| 1215 | /* Data for R_CKCORE_TLS_LDM32 relocations. */ |
| 1216 | union |
| 1217 | { |
| 1218 | bfd_signed_vma refcount; |
| 1219 | bfd_vma offset; |
| 1220 | } tls_ldm_got; |
| 1221 | |
| 1222 | /* The stub hash table. */ |
| 1223 | struct bfd_hash_table stub_hash_table; |
| 1224 | |
| 1225 | /* Linker stub bfd. */ |
| 1226 | bfd *stub_bfd; |
| 1227 | |
| 1228 | /* Linker call-backs. */ |
| 1229 | asection * (*add_stub_section) (const char *, asection *); |
| 1230 | void (*layout_sections_again) (void); |
| 1231 | |
| 1232 | /* Array to keep track of which stub sections have been created, and |
| 1233 | * information on stub grouping. */ |
| 1234 | struct map_stub *stub_group; |
| 1235 | |
| 1236 | /* Number of elements in stub_group. */ |
| 1237 | unsigned int top_id; |
| 1238 | |
| 1239 | /* Assorted information used by elf32_csky_size_stubs. */ |
| 1240 | unsigned int bfd_count; |
| 1241 | unsigned int top_index; |
| 1242 | asection **input_list; |
| 1243 | }; |
| 1244 | |
| 1245 | /* We can't change vectors in the bfd target which will apply to |
| 1246 | data sections, however we only do this to the text sections. */ |
| 1247 | |
| 1248 | static bfd_vma |
| 1249 | csky_get_insn_32 (bfd *input_bfd, |
| 1250 | bfd_byte *location) |
| 1251 | { |
| 1252 | if (bfd_big_endian (input_bfd)) |
| 1253 | return bfd_get_32 (input_bfd, location); |
| 1254 | else |
| 1255 | return (bfd_get_16 (input_bfd, location) << 16 |
| 1256 | | bfd_get_16 (input_bfd, location + 2)); |
| 1257 | } |
| 1258 | |
| 1259 | static void |
| 1260 | csky_put_insn_32 (bfd *input_bfd, |
| 1261 | bfd_vma x, |
| 1262 | bfd_byte *location) |
| 1263 | { |
| 1264 | if (bfd_big_endian (input_bfd)) |
| 1265 | bfd_put_32 (input_bfd, x, location); |
| 1266 | else |
| 1267 | { |
| 1268 | bfd_put_16 (input_bfd, x >> 16, location); |
| 1269 | bfd_put_16 (input_bfd, x & 0xffff, location + 2); |
| 1270 | } |
| 1271 | } |
| 1272 | |
| 1273 | /* Find or create a stub section. Returns a pointer to the stub section, and |
| 1274 | the section to which the stub section will be attached (in *LINK_SEC_P). |
| 1275 | LINK_SEC_P may be NULL. */ |
| 1276 | |
| 1277 | static asection * |
| 1278 | elf32_csky_create_or_find_stub_sec (asection **link_sec_p, asection *section, |
| 1279 | struct csky_elf_link_hash_table *htab) |
| 1280 | { |
| 1281 | asection *link_sec; |
| 1282 | asection *stub_sec; |
| 1283 | |
| 1284 | link_sec = htab->stub_group[section->id].link_sec; |
| 1285 | stub_sec = htab->stub_group[section->id].stub_sec; |
| 1286 | if (stub_sec == NULL) |
| 1287 | { |
| 1288 | stub_sec = htab->stub_group[link_sec->id].stub_sec; |
| 1289 | if (stub_sec == NULL) |
| 1290 | { |
| 1291 | size_t namelen; |
| 1292 | bfd_size_type len; |
| 1293 | char *s_name; |
| 1294 | |
| 1295 | namelen = strlen (link_sec->name); |
| 1296 | len = namelen + sizeof (STUB_SUFFIX); |
| 1297 | s_name = bfd_alloc (htab->stub_bfd, len); |
| 1298 | if (s_name == NULL) |
| 1299 | return NULL; |
| 1300 | |
| 1301 | memcpy (s_name, link_sec->name, namelen); |
| 1302 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| 1303 | stub_sec = (*htab->add_stub_section) (s_name, link_sec); |
| 1304 | if (stub_sec == NULL) |
| 1305 | return NULL; |
| 1306 | htab->stub_group[link_sec->id].stub_sec = stub_sec; |
| 1307 | } |
| 1308 | htab->stub_group[section->id].stub_sec = stub_sec; |
| 1309 | } |
| 1310 | |
| 1311 | if (link_sec_p) |
| 1312 | *link_sec_p = link_sec; |
| 1313 | |
| 1314 | return stub_sec; |
| 1315 | } |
| 1316 | |
| 1317 | /* Build a name for an entry in the stub hash table. */ |
| 1318 | |
| 1319 | static char * |
| 1320 | elf32_csky_stub_name (const asection *input_section, |
| 1321 | const asection *sym_sec, |
| 1322 | const struct csky_elf_link_hash_entry *hash, |
| 1323 | const Elf_Internal_Rela *rel) |
| 1324 | { |
| 1325 | char *stub_name; |
| 1326 | bfd_size_type len; |
| 1327 | |
| 1328 | if (hash) |
| 1329 | { |
| 1330 | len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1; |
| 1331 | stub_name = bfd_malloc (len); |
| 1332 | if (stub_name != NULL) |
| 1333 | sprintf (stub_name, "%08x_%s+%x", |
| 1334 | input_section->id & 0xffffffff, |
| 1335 | hash->elf.root.root.string, |
| 1336 | (int) rel->r_addend & 0xffffffff); |
| 1337 | } |
| 1338 | else |
| 1339 | { |
| 1340 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; |
| 1341 | stub_name = bfd_malloc (len); |
| 1342 | if (stub_name != NULL) |
| 1343 | sprintf (stub_name, "%08x_%x:%x+%x", |
| 1344 | input_section->id & 0xffffffff, |
| 1345 | sym_sec->id & 0xffffffff, |
| 1346 | (int) ELF32_R_SYM (rel->r_info) & 0xffffffff, |
| 1347 | (int) rel->r_addend & 0xffffffff); |
| 1348 | } |
| 1349 | |
| 1350 | return stub_name; |
| 1351 | } |
| 1352 | |
| 1353 | /* Determine the type of stub needed, if any, for a call. */ |
| 1354 | |
| 1355 | static enum elf32_csky_stub_type |
| 1356 | csky_type_of_stub (struct bfd_link_info *info, |
| 1357 | asection *input_sec, |
| 1358 | const Elf_Internal_Rela *rel, |
| 1359 | unsigned char st_type, |
| 1360 | struct csky_elf_link_hash_entry *hash, |
| 1361 | bfd_vma destination, |
| 1362 | asection *sym_sec ATTRIBUTE_UNUSED, |
| 1363 | bfd *input_bfd ATTRIBUTE_UNUSED, |
| 1364 | const char *name ATTRIBUTE_UNUSED) |
| 1365 | { |
| 1366 | bfd_vma location; |
| 1367 | bfd_signed_vma branch_offset; |
| 1368 | unsigned int r_type; |
| 1369 | enum elf32_csky_stub_type stub_type = csky_stub_none; |
| 1370 | struct elf_link_hash_entry * h = &hash->elf; |
| 1371 | |
| 1372 | /* We don't know the actual type of destination in case it is of |
| 1373 | type STT_SECTION: give up. */ |
| 1374 | if (st_type == STT_SECTION) |
| 1375 | return stub_type; |
| 1376 | |
| 1377 | location = (input_sec->output_offset |
| 1378 | + input_sec->output_section->vma |
| 1379 | + rel->r_offset); |
| 1380 | |
| 1381 | branch_offset = (bfd_signed_vma)(destination - location); |
| 1382 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1383 | if (r_type == R_CKCORE_PCREL_IMM26BY2 |
| 1384 | && ((h != NULL |
| 1385 | && ((h->def_dynamic && !h->def_regular) |
| 1386 | || (bfd_link_pic (info) |
| 1387 | && h->root.type == bfd_link_hash_defweak))) |
| 1388 | || branch_offset > BSR_MAX_FWD_BRANCH_OFFSET |
| 1389 | || branch_offset < BSR_MAX_BWD_BRANCH_OFFSET)) |
| 1390 | { |
| 1391 | if (bfd_csky_arch (info->output_bfd) == CSKY_ARCH_810 |
| 1392 | || bfd_csky_arch (info->output_bfd) == CSKY_ARCH_807) |
| 1393 | stub_type = csky_stub_long_branch_jmpi; |
| 1394 | else |
| 1395 | stub_type = csky_stub_long_branch; |
| 1396 | } |
| 1397 | |
| 1398 | return stub_type; |
| 1399 | } |
| 1400 | |
| 1401 | /* Create an entry in an C-SKY ELF linker hash table. */ |
| 1402 | |
| 1403 | static struct bfd_hash_entry * |
| 1404 | csky_elf_link_hash_newfunc (struct bfd_hash_entry * entry, |
| 1405 | struct bfd_hash_table * table, |
| 1406 | const char * string) |
| 1407 | { |
| 1408 | struct csky_elf_link_hash_entry * ret = |
| 1409 | (struct csky_elf_link_hash_entry *) entry; |
| 1410 | |
| 1411 | /* Allocate the structure if it has not already been allocated by a |
| 1412 | subclass. */ |
| 1413 | if (ret == NULL) |
| 1414 | { |
| 1415 | ret = (struct csky_elf_link_hash_entry *) |
| 1416 | bfd_hash_allocate (table, |
| 1417 | sizeof (struct csky_elf_link_hash_entry)); |
| 1418 | if (ret == NULL) |
| 1419 | return (struct bfd_hash_entry *) ret; |
| 1420 | } |
| 1421 | |
| 1422 | /* Call the allocation method of the superclass. */ |
| 1423 | ret = ((struct csky_elf_link_hash_entry *) |
| 1424 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *)ret, |
| 1425 | table, string)); |
| 1426 | if (ret != NULL) |
| 1427 | { |
| 1428 | struct csky_elf_link_hash_entry *eh; |
| 1429 | |
| 1430 | eh = (struct csky_elf_link_hash_entry *) ret; |
| 1431 | eh->dyn_relocs = NULL; |
| 1432 | eh->plt_refcount = 0; |
| 1433 | eh->jsri2bsr_refcount = 0; |
| 1434 | eh->tls_type = GOT_NORMAL; |
| 1435 | ret->stub_cache = NULL; |
| 1436 | } |
| 1437 | |
| 1438 | return (struct bfd_hash_entry *) ret; |
| 1439 | } |
| 1440 | |
| 1441 | /* Initialize an entry in the stub hash table. */ |
| 1442 | |
| 1443 | static struct bfd_hash_entry * |
| 1444 | stub_hash_newfunc (struct bfd_hash_entry *entry, |
| 1445 | struct bfd_hash_table *table, |
| 1446 | const char *string) |
| 1447 | { |
| 1448 | /* Allocate the structure if it has not already been allocated by a |
| 1449 | subclass. */ |
| 1450 | if (entry == NULL) |
| 1451 | { |
| 1452 | entry = ((struct bfd_hash_entry *) |
| 1453 | bfd_hash_allocate (table, |
| 1454 | sizeof (struct elf32_csky_stub_hash_entry))); |
| 1455 | if (entry == NULL) |
| 1456 | return entry; |
| 1457 | } |
| 1458 | |
| 1459 | /* Call the allocation method of the superclass. */ |
| 1460 | entry = bfd_hash_newfunc (entry, table, string); |
| 1461 | if (entry != NULL) |
| 1462 | { |
| 1463 | struct elf32_csky_stub_hash_entry *eh; |
| 1464 | |
| 1465 | /* Initialize the local fields. */ |
| 1466 | eh = (struct elf32_csky_stub_hash_entry *) entry; |
| 1467 | eh->stub_sec = NULL; |
| 1468 | eh->stub_offset = 0; |
| 1469 | eh->target_value = 0; |
| 1470 | eh->target_section = NULL; |
| 1471 | eh->target_addend = 0; |
| 1472 | eh->stub_type = csky_stub_none; |
| 1473 | eh->stub_size = 0; |
| 1474 | eh->stub_template = NULL; |
| 1475 | eh->stub_template_size = -1; |
| 1476 | eh->h = NULL; |
| 1477 | eh->id_sec = NULL; |
| 1478 | eh->output_name = NULL; |
| 1479 | } |
| 1480 | |
| 1481 | return entry; |
| 1482 | } |
| 1483 | |
| 1484 | /* Free the derived linker hash table. */ |
| 1485 | |
| 1486 | static void |
| 1487 | csky_elf_link_hash_table_free (bfd *obfd) |
| 1488 | { |
| 1489 | struct csky_elf_link_hash_table *ret |
| 1490 | = (struct csky_elf_link_hash_table *) obfd->link.hash; |
| 1491 | |
| 1492 | bfd_hash_table_free (&ret->stub_hash_table); |
| 1493 | _bfd_elf_link_hash_table_free (obfd); |
| 1494 | } |
| 1495 | |
| 1496 | /* Create an CSKY elf linker hash table. */ |
| 1497 | |
| 1498 | static struct bfd_link_hash_table * |
| 1499 | csky_elf_link_hash_table_create (bfd *abfd) |
| 1500 | { |
| 1501 | struct csky_elf_link_hash_table *ret; |
| 1502 | bfd_size_type amt = sizeof (struct csky_elf_link_hash_table); |
| 1503 | |
| 1504 | ret = (struct csky_elf_link_hash_table*) bfd_zmalloc (amt); |
| 1505 | if (ret == NULL) |
| 1506 | return NULL; |
| 1507 | |
| 1508 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
| 1509 | csky_elf_link_hash_newfunc, |
| 1510 | sizeof (struct csky_elf_link_hash_entry), |
| 1511 | CSKY_ELF_DATA)) |
| 1512 | { |
| 1513 | free (ret); |
| 1514 | return NULL; |
| 1515 | } |
| 1516 | |
| 1517 | if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc, |
| 1518 | sizeof (struct elf32_csky_stub_hash_entry))) |
| 1519 | { |
| 1520 | free (ret); |
| 1521 | return NULL; |
| 1522 | } |
| 1523 | ret->elf.root.hash_table_free = csky_elf_link_hash_table_free; |
| 1524 | return &ret->elf.root; |
| 1525 | } |
| 1526 | |
| 1527 | static bfd_boolean |
| 1528 | csky_elf_mkobject (bfd *abfd) |
| 1529 | { |
| 1530 | return bfd_elf_allocate_object (abfd, sizeof (struct csky_elf_obj_tdata), |
| 1531 | CSKY_ELF_DATA); |
| 1532 | } |
| 1533 | |
| 1534 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 1535 | regular object. The current definition is in some section of the |
| 1536 | dynamic object, but we're not including those sections. We have to |
| 1537 | change the definition to something the rest of the link can |
| 1538 | understand. */ |
| 1539 | |
| 1540 | static bfd_boolean |
| 1541 | csky_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| 1542 | struct elf_link_hash_entry *h) |
| 1543 | { |
| 1544 | struct csky_elf_link_hash_entry *eh; |
| 1545 | struct csky_elf_link_hash_table *htab; |
| 1546 | asection *srel; |
| 1547 | asection *s; |
| 1548 | eh = (struct csky_elf_link_hash_entry *)h; |
| 1549 | if (eh == NULL) |
| 1550 | return FALSE; |
| 1551 | |
| 1552 | htab = csky_elf_hash_table (info); |
| 1553 | if (htab == NULL) |
| 1554 | return FALSE; |
| 1555 | |
| 1556 | /* Clear jsri2bsr_refcount, if creating shared library files. */ |
| 1557 | if (bfd_link_pic (info) && eh->jsri2bsr_refcount > 0) |
| 1558 | eh->jsri2bsr_refcount = 0; |
| 1559 | |
| 1560 | /* If there is a function, put it in the procedure linkage table. We |
| 1561 | will fill in the contents of the procedure linkage table later. */ |
| 1562 | if (h->needs_plt) |
| 1563 | { |
| 1564 | /* Calls to STT_GNU_IFUNC symbols always use a PLT, even if the |
| 1565 | symbol binds locally. */ |
| 1566 | if (h->plt.refcount <= 0 |
| 1567 | || (h->type != STT_GNU_IFUNC |
| 1568 | && (SYMBOL_CALLS_LOCAL (info, h) |
| 1569 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 1570 | && h->root.type == bfd_link_hash_undefweak)))) |
| 1571 | |
| 1572 | { |
| 1573 | /* This case can occur if we saw a PLT32 reloc in an input |
| 1574 | file, but the symbol was never referred to by a dynamic |
| 1575 | object, or if all references were garbage collected. In |
| 1576 | such a case, we don't actually need to build a procedure |
| 1577 | linkage table, and we can just do a PC32 reloc instead. */ |
| 1578 | h->plt.offset = (bfd_vma) -1; |
| 1579 | h->needs_plt = 0; |
| 1580 | if (h->got.refcount == 0) |
| 1581 | h->got.refcount += 1; |
| 1582 | } |
| 1583 | else if (h->got.refcount != 0) |
| 1584 | { |
| 1585 | h->got.refcount -= eh->plt_refcount; |
| 1586 | eh->plt_refcount = 0; |
| 1587 | } |
| 1588 | return TRUE; |
| 1589 | } |
| 1590 | else |
| 1591 | /* It's possible that we incorrectly decided a .plt reloc was |
| 1592 | needed for an R_CKCORE_PC32 or similar reloc to a non-function |
| 1593 | sym in check_relocs. We can't decide accurately between function |
| 1594 | and non-function syms in check_relocs; objects loaded later in |
| 1595 | the link may change h->type. So fix it now. */ |
| 1596 | h->plt.offset = (bfd_vma) -1; |
| 1597 | |
| 1598 | /* If this is a weak symbol, and there is a real definition, the |
| 1599 | processor independent code will have arranged for us to see the |
| 1600 | real definition first, and we can just use the same value. */ |
| 1601 | if (h->is_weakalias) |
| 1602 | { |
| 1603 | struct elf_link_hash_entry *def = weakdef (h); |
| 1604 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| 1605 | h->root.u.def.section = def->root.u.def.section; |
| 1606 | h->root.u.def.value = def->root.u.def.value; |
| 1607 | return TRUE; |
| 1608 | } |
| 1609 | |
| 1610 | /* If there are no non-GOT references, we do not need a copy |
| 1611 | relocation. */ |
| 1612 | if (!h->non_got_ref) |
| 1613 | return TRUE; |
| 1614 | |
| 1615 | /* This is a reference to a symbol defined by a dynamic object which |
| 1616 | is not a function. */ |
| 1617 | |
| 1618 | /* If we are creating a shared library, we must presume that the |
| 1619 | only references to the symbol are via the global offset table. |
| 1620 | For such cases we need not do anything here; the relocations will |
| 1621 | be handled correctly by relocate_section. */ |
| 1622 | if (bfd_link_pic (info) || htab->elf.is_relocatable_executable) |
| 1623 | return TRUE; |
| 1624 | |
| 1625 | /* We must allocate the symbol in our .dynbss section, which will |
| 1626 | become part of the .bss section of the executable. There will be |
| 1627 | an entry for this symbol in the .dynsym section. The dynamic |
| 1628 | object will contain position independent code, so all references |
| 1629 | from the dynamic object to this symbol will go through the global |
| 1630 | offset table. The dynamic linker will use the .dynsym entry to |
| 1631 | determine the address it must put in the global offset table, so |
| 1632 | both the dynamic object and the regular object will refer to the |
| 1633 | same memory location for the variable. */ |
| 1634 | /* We must generate a R_CKCORE_COPY reloc to tell the dynamic linker to |
| 1635 | copy the initial value out of the dynamic object and into the |
| 1636 | runtime process image. We need to remember the offset into the |
| 1637 | .rela.bss section we are going to use. */ |
| 1638 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
| 1639 | { |
| 1640 | s = htab->elf.sdynrelro; |
| 1641 | srel = htab->elf.sreldynrelro; |
| 1642 | } |
| 1643 | else |
| 1644 | { |
| 1645 | s = htab->elf.sdynbss; |
| 1646 | srel = htab->elf.srelbss; |
| 1647 | } |
| 1648 | if (info->nocopyreloc == 0 |
| 1649 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 |
| 1650 | && h->size != 0 |
| 1651 | && srel != NULL |
| 1652 | && s != NULL) |
| 1653 | { |
| 1654 | srel->size += sizeof (Elf32_External_Rela); |
| 1655 | h->needs_copy = 1; |
| 1656 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| 1657 | } |
| 1658 | |
| 1659 | h->non_got_ref = 0; |
| 1660 | return TRUE; |
| 1661 | } |
| 1662 | |
| 1663 | /* Allocate space in .plt, .got and associated reloc sections for |
| 1664 | dynamic relocs. */ |
| 1665 | |
| 1666 | static bfd_boolean |
| 1667 | csky_allocate_dynrelocs (struct elf_link_hash_entry *h, PTR inf) |
| 1668 | { |
| 1669 | struct bfd_link_info *info; |
| 1670 | struct csky_elf_link_hash_table *htab; |
| 1671 | struct csky_elf_link_hash_entry *eh; |
| 1672 | struct elf_dyn_relocs *p; |
| 1673 | |
| 1674 | /* For indirect case, such as _ZdlPv to _ZdlPv@@GLIBCXX_3.4. */ |
| 1675 | if (h->root.type == bfd_link_hash_indirect) |
| 1676 | return TRUE; |
| 1677 | |
| 1678 | if (h->root.type == bfd_link_hash_warning) |
| 1679 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1680 | |
| 1681 | |
| 1682 | info = (struct bfd_link_info *) inf; |
| 1683 | htab = csky_elf_hash_table (info); |
| 1684 | if (htab == NULL) |
| 1685 | return FALSE; |
| 1686 | /*TODO: how to deal with weak symbol relocs. */ |
| 1687 | if ((htab->elf.dynamic_sections_created || h->type == STT_GNU_IFUNC) |
| 1688 | && h->plt.refcount > 0) |
| 1689 | { |
| 1690 | /* Make sure this symbol is output as a dynamic symbol. |
| 1691 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1692 | if (h->dynindx == -1 && !h->forced_local |
| 1693 | && h->root.type == bfd_link_hash_undefweak |
| 1694 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1695 | return FALSE; |
| 1696 | if (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
| 1697 | { |
| 1698 | asection *splt = htab->elf.splt; |
| 1699 | |
| 1700 | /* If this is the first .plt entry, make room for the special |
| 1701 | first entry. */ |
| 1702 | if (splt->size == 0) |
| 1703 | { |
| 1704 | if (bfd_csky_abi (info->output_bfd) == CSKY_ABI_V1) |
| 1705 | splt->size += PLT_ENTRY_SIZE_P; |
| 1706 | else |
| 1707 | splt->size += PLT_ENTRY_SIZE; |
| 1708 | } |
| 1709 | h->plt.offset = splt->size; |
| 1710 | |
| 1711 | /* If this symbol is not defined in a regular file, and we are |
| 1712 | not generating a shared library, then set the symbol to this |
| 1713 | location in the .plt. This is required to make function |
| 1714 | pointers compare as equal between the normal executable and |
| 1715 | the shared library. */ |
| 1716 | if (!bfd_link_pic (info) && !h->def_regular) |
| 1717 | { |
| 1718 | h->root.u.def.section = splt; |
| 1719 | h->root.u.def.value = h->plt.offset; |
| 1720 | } |
| 1721 | |
| 1722 | /* Make room for this entry. */ |
| 1723 | if (bfd_csky_abi (info->output_bfd) == CSKY_ABI_V1) |
| 1724 | splt->size += PLT_ENTRY_SIZE_P; |
| 1725 | else |
| 1726 | splt->size += PLT_ENTRY_SIZE; |
| 1727 | /* We also need to make an entry in the .rela.plt section. */ |
| 1728 | htab->elf.srelplt->size += sizeof (Elf32_External_Rela); |
| 1729 | |
| 1730 | /* We also need to make an entry in the .got.plt section, which |
| 1731 | will be placed in the .got section by the linker script. */ |
| 1732 | htab->elf.sgotplt->size += 4; |
| 1733 | } |
| 1734 | else |
| 1735 | { |
| 1736 | h->plt.offset = (bfd_vma) -1; |
| 1737 | h->needs_plt = 0; |
| 1738 | } |
| 1739 | } |
| 1740 | else |
| 1741 | { |
| 1742 | h->plt.offset = (bfd_vma) -1; |
| 1743 | h->needs_plt = 0; |
| 1744 | } |
| 1745 | |
| 1746 | if (h->got.refcount > 0) |
| 1747 | { |
| 1748 | asection *sgot; |
| 1749 | bfd_boolean dyn; |
| 1750 | int indx; |
| 1751 | |
| 1752 | int tls_type = csky_elf_hash_entry (h)->tls_type; |
| 1753 | /* Make sure this symbol is output as a dynamic symbol. |
| 1754 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1755 | if (h->dynindx == -1 && !h->forced_local |
| 1756 | && h->root.type == bfd_link_hash_undefweak |
| 1757 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1758 | return FALSE; |
| 1759 | |
| 1760 | sgot = htab->elf.sgot; |
| 1761 | h->got.offset = sgot->size; |
| 1762 | BFD_ASSERT (tls_type != GOT_UNKNOWN); |
| 1763 | if (tls_type == GOT_NORMAL) |
| 1764 | /* Non-TLS symbols need one GOT slot. */ |
| 1765 | sgot->size += 4; |
| 1766 | else |
| 1767 | { |
| 1768 | if (tls_type & GOT_TLS_GD) |
| 1769 | /* R_CKCORE_TLS_GD32 needs 2 consecutive GOT slots. */ |
| 1770 | sgot->size += 8; |
| 1771 | if (tls_type & GOT_TLS_IE) |
| 1772 | /* R_CKCORE_TLS_IE32 needs one GOT slot. */ |
| 1773 | sgot->size += 4; |
| 1774 | } |
| 1775 | dyn = htab->elf.dynamic_sections_created; |
| 1776 | indx = 0; |
| 1777 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
| 1778 | && (! bfd_link_pic (info) || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 1779 | indx = h->dynindx; |
| 1780 | |
| 1781 | if (tls_type != GOT_NORMAL |
| 1782 | && (bfd_link_pic (info) || indx != 0) |
| 1783 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 1784 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 1785 | || h->root.type != bfd_link_hash_undefweak)) |
| 1786 | { |
| 1787 | if (tls_type & GOT_TLS_IE) |
| 1788 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); |
| 1789 | if (tls_type & GOT_TLS_GD) |
| 1790 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); |
| 1791 | if ((tls_type & GOT_TLS_GD) && indx != 0) |
| 1792 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); |
| 1793 | } |
| 1794 | else if (((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 1795 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 1796 | || h->root.type != bfd_link_hash_undefweak) |
| 1797 | && (bfd_link_pic (info) |
| 1798 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h) |
| 1799 | || h->plt.offset == (bfd_vma) -1)) |
| 1800 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); |
| 1801 | } |
| 1802 | else |
| 1803 | h->got.offset = (bfd_vma) -1; |
| 1804 | |
| 1805 | eh = (struct csky_elf_link_hash_entry *) h; |
| 1806 | if (eh->dyn_relocs == NULL) |
| 1807 | return TRUE; |
| 1808 | |
| 1809 | /* In the shared -Bsymbolic case, discard space allocated for |
| 1810 | dynamic pc-relative relocs against symbols which turn out to be |
| 1811 | defined in regular objects. For the normal shared case, discard |
| 1812 | space for pc-relative relocs that have become local due to symbol |
| 1813 | visibility changes. */ |
| 1814 | |
| 1815 | if (bfd_link_pic (info)) |
| 1816 | { |
| 1817 | if (SYMBOL_CALLS_LOCAL (info, h)) |
| 1818 | { |
| 1819 | struct elf_dyn_relocs **pp; |
| 1820 | |
| 1821 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| 1822 | { |
| 1823 | p->count -= p->pc_count; |
| 1824 | p->pc_count = 0; |
| 1825 | if (p->count == 0) |
| 1826 | *pp = p->next; |
| 1827 | else |
| 1828 | pp = &p->next; |
| 1829 | } |
| 1830 | } |
| 1831 | |
| 1832 | if (eh->jsri2bsr_refcount |
| 1833 | && h->root.type == bfd_link_hash_defined |
| 1834 | && eh->dyn_relocs != NULL) |
| 1835 | eh->dyn_relocs->count -= eh->jsri2bsr_refcount; |
| 1836 | |
| 1837 | /* Also discard relocs on undefined weak syms with non-default |
| 1838 | visibility. */ |
| 1839 | if (eh->dyn_relocs != NULL |
| 1840 | && h->root.type == bfd_link_hash_undefweak) |
| 1841 | { |
| 1842 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| 1843 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 1844 | eh->dyn_relocs = NULL; |
| 1845 | |
| 1846 | /* Make sure undefined weak symbols are output as a dynamic |
| 1847 | symbol in PIEs. */ |
| 1848 | else if (h->dynindx == -1 |
| 1849 | && !h->forced_local |
| 1850 | && !bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1851 | return FALSE; |
| 1852 | } |
| 1853 | |
| 1854 | } |
| 1855 | else |
| 1856 | { |
| 1857 | /* For the non-shared case, discard space for relocs against |
| 1858 | symbols which turn out to need copy relocs or are not |
| 1859 | dynamic. */ |
| 1860 | |
| 1861 | if (!h->non_got_ref |
| 1862 | && ((h->def_dynamic && !h->def_regular) |
| 1863 | || (htab->elf.dynamic_sections_created |
| 1864 | && (h->root.type == bfd_link_hash_undefweak |
| 1865 | || h->root.type == bfd_link_hash_indirect |
| 1866 | || h->root.type == bfd_link_hash_undefined)))) |
| 1867 | { |
| 1868 | /* Make sure this symbol is output as a dynamic symbol. |
| 1869 | Undefined weak syms won't yet be marked as dynamic. */ |
| 1870 | if (h->dynindx == -1 && !h->forced_local |
| 1871 | && h->root.type == bfd_link_hash_undefweak) |
| 1872 | { |
| 1873 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| 1874 | return FALSE; |
| 1875 | } |
| 1876 | |
| 1877 | /* If that succeeded, we know we'll be keeping all the |
| 1878 | relocs. */ |
| 1879 | if (h->dynindx != -1) |
| 1880 | goto keep; |
| 1881 | } |
| 1882 | |
| 1883 | eh->dyn_relocs = NULL; |
| 1884 | |
| 1885 | keep: ; |
| 1886 | } |
| 1887 | |
| 1888 | /* Finally, allocate space. */ |
| 1889 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| 1890 | { |
| 1891 | asection *srelgot = htab->elf.srelgot; |
| 1892 | srelgot->size += p->count * sizeof (Elf32_External_Rela); |
| 1893 | } |
| 1894 | |
| 1895 | return TRUE; |
| 1896 | } |
| 1897 | |
| 1898 | static asection * |
| 1899 | readonly_dynrelocs (struct elf_link_hash_entry *h) |
| 1900 | { |
| 1901 | struct elf_dyn_relocs *p; |
| 1902 | |
| 1903 | for (p = csky_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next) |
| 1904 | { |
| 1905 | asection *s = p->sec->output_section; |
| 1906 | |
| 1907 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| 1908 | return p->sec; |
| 1909 | } |
| 1910 | return NULL; |
| 1911 | } |
| 1912 | |
| 1913 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
| 1914 | read-only sections. */ |
| 1915 | |
| 1916 | static bfd_boolean |
| 1917 | maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) |
| 1918 | { |
| 1919 | asection *sec; |
| 1920 | |
| 1921 | if (h->root.type == bfd_link_hash_indirect) |
| 1922 | return TRUE; |
| 1923 | |
| 1924 | sec = readonly_dynrelocs (h); |
| 1925 | if (sec != NULL) |
| 1926 | { |
| 1927 | struct bfd_link_info *info = (struct bfd_link_info *) info_p; |
| 1928 | |
| 1929 | info->flags |= DF_TEXTREL; |
| 1930 | info->callbacks->minfo |
| 1931 | (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"), |
| 1932 | sec->owner, h->root.root.string, sec); |
| 1933 | |
| 1934 | /* Not an error, just cut short the traversal. */ |
| 1935 | return FALSE; |
| 1936 | } |
| 1937 | return TRUE; |
| 1938 | } |
| 1939 | |
| 1940 | /* Set the sizes of the dynamic sections. */ |
| 1941 | |
| 1942 | static bfd_boolean |
| 1943 | csky_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| 1944 | struct bfd_link_info *info) |
| 1945 | { |
| 1946 | struct csky_elf_link_hash_table *htab; |
| 1947 | bfd *dynobj; |
| 1948 | asection *s; |
| 1949 | bfd_boolean relocs; |
| 1950 | bfd *ibfd; |
| 1951 | |
| 1952 | htab = csky_elf_hash_table (info); |
| 1953 | if (htab == NULL) |
| 1954 | return FALSE; |
| 1955 | dynobj = htab->elf.dynobj; |
| 1956 | if (dynobj == NULL) |
| 1957 | return FALSE; |
| 1958 | |
| 1959 | if (htab->elf.dynamic_sections_created) |
| 1960 | { |
| 1961 | /* Set the contents of the .interp section to the interpreter. */ |
| 1962 | if (!bfd_link_pic (info) && !info->nointerp) |
| 1963 | { |
| 1964 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 1965 | BFD_ASSERT (s != NULL); |
| 1966 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 1967 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 1968 | } |
| 1969 | } |
| 1970 | |
| 1971 | /* Set up .got offsets for local syms, and space for local dynamic |
| 1972 | relocs. */ |
| 1973 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| 1974 | { |
| 1975 | bfd_signed_vma *local_got_refcounts; |
| 1976 | bfd_signed_vma *end_local_got; |
| 1977 | bfd_size_type locsymcount; |
| 1978 | Elf_Internal_Shdr *symtab_hdr; |
| 1979 | asection *srelgot, *sgot; |
| 1980 | char *local_tls_type; |
| 1981 | |
| 1982 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| 1983 | continue; |
| 1984 | |
| 1985 | sgot = htab->elf.sgot; |
| 1986 | srelgot = htab->elf.srelgot; |
| 1987 | |
| 1988 | for (s = ibfd->sections; s != NULL; s = s->next) |
| 1989 | { |
| 1990 | struct elf_dyn_relocs *p; |
| 1991 | |
| 1992 | for (p = *((struct elf_dyn_relocs **) |
| 1993 | &elf_section_data (s)->local_dynrel); |
| 1994 | p != NULL; |
| 1995 | p = p->next) |
| 1996 | { |
| 1997 | if (!bfd_is_abs_section (p->sec) |
| 1998 | && bfd_is_abs_section (p->sec->output_section)) |
| 1999 | /* Input section has been discarded, either because |
| 2000 | it is a copy of a linkonce section or due to |
| 2001 | linker script /DISCARD/, so we'll be discarding |
| 2002 | the relocs too. */ |
| 2003 | ; |
| 2004 | else if (p->count != 0) |
| 2005 | { |
| 2006 | srelgot->size += p->count * sizeof (Elf32_External_Rela); |
| 2007 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| 2008 | info->flags |= DF_TEXTREL; |
| 2009 | } |
| 2010 | } |
| 2011 | } |
| 2012 | |
| 2013 | local_got_refcounts = elf_local_got_refcounts (ibfd); |
| 2014 | if (!local_got_refcounts) |
| 2015 | continue; |
| 2016 | |
| 2017 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| 2018 | locsymcount = symtab_hdr->sh_info; |
| 2019 | end_local_got = local_got_refcounts + locsymcount; |
| 2020 | local_tls_type = csky_elf_local_got_tls_type (ibfd); |
| 2021 | |
| 2022 | for (; local_got_refcounts < end_local_got; |
| 2023 | ++local_got_refcounts, ++local_tls_type) |
| 2024 | { |
| 2025 | if (*local_got_refcounts > 0) |
| 2026 | { |
| 2027 | /* GOT_TLS_GD and GOT_TLS_IE type for TLS, GOT_NORMAL type |
| 2028 | for GOT. If output file is shared library, we should output |
| 2029 | GOT_TLS_GD type relocation in .rel.got. */ |
| 2030 | *local_got_refcounts = sgot->size; |
| 2031 | if (*local_tls_type & GOT_TLS_GD) |
| 2032 | /* TLS_GD relocs need an 8-byte structure in the GOT. */ |
| 2033 | sgot->size += 8; |
| 2034 | if (*local_tls_type & GOT_TLS_IE) |
| 2035 | sgot->size += 4; |
| 2036 | if (*local_tls_type == GOT_NORMAL) |
| 2037 | sgot->size += 4; |
| 2038 | if (bfd_link_pic (info) || *local_tls_type == GOT_TLS_GD) |
| 2039 | srelgot->size += sizeof (Elf32_External_Rela); |
| 2040 | } |
| 2041 | else |
| 2042 | *local_got_refcounts = (bfd_vma) -1; |
| 2043 | } |
| 2044 | } |
| 2045 | |
| 2046 | if (htab->tls_ldm_got.refcount > 0) |
| 2047 | { |
| 2048 | /* Allocate two GOT entries and one dynamic relocation (if necessary) |
| 2049 | for R_CSKY_TLS_LDM32 relocations. */ |
| 2050 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
| 2051 | htab->elf.sgot->size += 8; |
| 2052 | if (bfd_link_pic (info)) |
| 2053 | htab->elf.srelgot->size += sizeof (Elf32_External_Rela); |
| 2054 | } |
| 2055 | else |
| 2056 | htab->tls_ldm_got.offset = -1; |
| 2057 | |
| 2058 | /* Allocate global sym .plt and .got entries, and space for global |
| 2059 | sym dynamic relocs. */ |
| 2060 | elf_link_hash_traverse (&htab->elf, csky_allocate_dynrelocs, (PTR) info); |
| 2061 | |
| 2062 | /* Check for GOT overflow. */ |
| 2063 | if (check_got_overflow == 1 |
| 2064 | && htab->elf.sgot->size + htab->elf.sgotplt->size > GOT_MAX_SIZE) |
| 2065 | { |
| 2066 | _bfd_error_handler (_("GOT table size out of range")); /* */ |
| 2067 | return FALSE; |
| 2068 | } |
| 2069 | |
| 2070 | /* We now have determined the sizes of the various dynamic sections. |
| 2071 | Allocate memory for them. */ |
| 2072 | relocs = FALSE; |
| 2073 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 2074 | { |
| 2075 | bfd_boolean strip_section = TRUE; |
| 2076 | |
| 2077 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 2078 | continue; |
| 2079 | |
| 2080 | if (s == htab->elf.splt |
| 2081 | || s == htab->elf.sgot |
| 2082 | || s == htab->elf.sgotplt |
| 2083 | || s == htab->elf.sdynrelro |
| 2084 | || s == htab->elf.sreldynrelro) |
| 2085 | { |
| 2086 | /* Strip this section if we don't need it; |
| 2087 | see the comment below. */ |
| 2088 | /* We'd like to strip these sections if they aren't needed, but if |
| 2089 | we've exported dynamic symbols from them we must leave them. |
| 2090 | It's too late to tell BFD to get rid of the symbols. */ |
| 2091 | |
| 2092 | if (htab->elf.hplt != NULL) |
| 2093 | strip_section = FALSE; |
| 2094 | } |
| 2095 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel") ) |
| 2096 | { |
| 2097 | if (s->size != 0 ) |
| 2098 | relocs = TRUE; |
| 2099 | |
| 2100 | /* We use the reloc_count field as a counter if we need |
| 2101 | to copy relocs into the output file. */ |
| 2102 | s->reloc_count = 0; |
| 2103 | } |
| 2104 | else |
| 2105 | /* It's not one of our sections, so don't allocate space. */ |
| 2106 | continue; |
| 2107 | |
| 2108 | /* Strip this section if we don't need it; see the |
| 2109 | comment below. */ |
| 2110 | if (s->size == 0) |
| 2111 | { |
| 2112 | /* If we don't need this section, strip it from the |
| 2113 | output file. This is mostly to handle .rel.bss and |
| 2114 | .rel.plt. We must create both sections in |
| 2115 | create_dynamic_sections, because they must be created |
| 2116 | before the linker maps input sections to output |
| 2117 | sections. The linker does that before |
| 2118 | adjust_dynamic_symbol is called, and it is that |
| 2119 | function which decides whether anything needs to go |
| 2120 | into these sections. */ |
| 2121 | if (strip_section) |
| 2122 | s->flags |= SEC_EXCLUDE; |
| 2123 | continue; |
| 2124 | } |
| 2125 | |
| 2126 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
| 2127 | continue; |
| 2128 | |
| 2129 | /* Allocate memory for the section contents. We use bfd_zalloc |
| 2130 | here in case unused entries are not reclaimed before the |
| 2131 | section's contents are written out. This should not happen, |
| 2132 | but this way if it does, we get a R_CKCORE_NONE reloc instead |
| 2133 | of garbage. */ |
| 2134 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
| 2135 | if (s->contents == NULL) |
| 2136 | return FALSE; |
| 2137 | } |
| 2138 | |
| 2139 | if (htab->elf.dynamic_sections_created) |
| 2140 | { |
| 2141 | /* Add some entries to the .dynamic section. We fill in the |
| 2142 | values later, in csky_elf_finish_dynamic_sections, but we |
| 2143 | must add the entries now so that we get the correct size for |
| 2144 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 2145 | dynamic linker and used by the debugger. */ |
| 2146 | #define add_dynamic_entry(TAG, VAL) \ |
| 2147 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
| 2148 | |
| 2149 | if (bfd_link_executable (info) && !add_dynamic_entry (DT_DEBUG, 0)) |
| 2150 | return FALSE; |
| 2151 | |
| 2152 | if (htab->elf.sgot->size != 0 || htab->elf.splt->size) |
| 2153 | { |
| 2154 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 2155 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 2156 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 2157 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 2158 | return FALSE; |
| 2159 | } |
| 2160 | |
| 2161 | if (relocs) |
| 2162 | { |
| 2163 | if (!add_dynamic_entry (DT_RELA, 0) |
| 2164 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 2165 | || !add_dynamic_entry (DT_RELAENT, |
| 2166 | sizeof (Elf32_External_Rela))) |
| 2167 | return FALSE; |
| 2168 | |
| 2169 | /* If any dynamic relocs apply to a read-only section, |
| 2170 | then we need a DT_TEXTREL entry. */ |
| 2171 | if ((info->flags & DF_TEXTREL) == 0) |
| 2172 | elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); |
| 2173 | |
| 2174 | if ((info->flags & DF_TEXTREL) != 0 |
| 2175 | && !add_dynamic_entry (DT_TEXTREL, 0)) |
| 2176 | return FALSE; |
| 2177 | } |
| 2178 | } |
| 2179 | #undef add_dynamic_entry |
| 2180 | |
| 2181 | return TRUE; |
| 2182 | } |
| 2183 | |
| 2184 | /* Finish up dynamic symbol handling. We set the contents of various |
| 2185 | dynamic sections here. */ |
| 2186 | |
| 2187 | static bfd_boolean |
| 2188 | csky_elf_finish_dynamic_symbol (bfd *output_bfd, |
| 2189 | struct bfd_link_info *info, |
| 2190 | struct elf_link_hash_entry *h, |
| 2191 | Elf_Internal_Sym *sym) |
| 2192 | { |
| 2193 | struct csky_elf_link_hash_table *htab; |
| 2194 | |
| 2195 | htab = csky_elf_hash_table (info); |
| 2196 | if (htab == NULL) |
| 2197 | return FALSE; |
| 2198 | |
| 2199 | /* Sanity check to make sure no unexpected symbol reaches here. |
| 2200 | This matches the test in csky_elf_relocate_section handling |
| 2201 | of GOT/PLT entries. */ |
| 2202 | BFD_ASSERT (! (h->dynindx == -1 |
| 2203 | && !h->forced_local |
| 2204 | && h->root.type != bfd_link_hash_undefweak |
| 2205 | && bfd_link_pic (info))); |
| 2206 | |
| 2207 | if (h->plt.offset != (bfd_vma) -1) |
| 2208 | { |
| 2209 | bfd_vma plt_index; |
| 2210 | bfd_vma got_offset; |
| 2211 | Elf_Internal_Rela rel; |
| 2212 | bfd_byte *loc; |
| 2213 | asection *plt, *relplt, *gotplt; |
| 2214 | |
| 2215 | plt = htab->elf.splt; |
| 2216 | relplt = htab->elf.srelplt; |
| 2217 | gotplt = htab->elf.sgotplt; |
| 2218 | |
| 2219 | /* This symbol has an entry in the procedure linkage table. Set |
| 2220 | it up. */ |
| 2221 | BFD_ASSERT (h->dynindx != -1 |
| 2222 | || ((h->forced_local || bfd_link_executable (info)) |
| 2223 | && h->def_regular)); |
| 2224 | BFD_ASSERT (plt != NULL && gotplt != NULL && relplt != NULL); |
| 2225 | if (bfd_csky_abi (output_bfd) == CSKY_ABI_V2) |
| 2226 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
| 2227 | else |
| 2228 | plt_index = h->plt.offset / PLT_ENTRY_SIZE_P - 1; |
| 2229 | got_offset = (plt_index + 3) * 4; |
| 2230 | |
| 2231 | /* Fill in the entry in the procedure linkage table. */ |
| 2232 | if (bfd_csky_abi (output_bfd) == CSKY_ABI_V2) |
| 2233 | { |
| 2234 | csky_put_insn_32 (output_bfd, csky_elf_plt_entry_v2[0], |
| 2235 | plt->contents + h->plt.offset); |
| 2236 | csky_put_insn_32 (output_bfd, |
| 2237 | (csky_elf_plt_entry_v2[1] | plt_index), |
| 2238 | plt->contents + h->plt.offset + 4); |
| 2239 | csky_put_insn_32 (output_bfd, csky_elf_plt_entry_v2[2], |
| 2240 | plt->contents + h->plt.offset + 8); |
| 2241 | } |
| 2242 | else |
| 2243 | { |
| 2244 | int i; |
| 2245 | for (i = 0; i < 6; i++) |
| 2246 | bfd_put_16 (output_bfd, csky_elf_plt_entry_v1[i], |
| 2247 | plt->contents + h->plt.offset + i * 2); |
| 2248 | bfd_put_32 (output_bfd, plt_index, |
| 2249 | plt->contents + h->plt.offset + i * 2); |
| 2250 | } |
| 2251 | |
| 2252 | /* Fill in the entry in the .rel.plt section. */ |
| 2253 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
| 2254 | + htab->elf.sgotplt->output_offset |
| 2255 | + got_offset); |
| 2256 | rel.r_info = ELF32_R_INFO (h->dynindx, R_CKCORE_JUMP_SLOT); |
| 2257 | rel.r_addend = (plt->output_section->vma |
| 2258 | + plt->output_offset |
| 2259 | + h->plt.offset); |
| 2260 | loc = (htab->elf.srelplt->contents |
| 2261 | + plt_index * sizeof (Elf32_External_Rela)); |
| 2262 | |
| 2263 | if (loc != NULL) |
| 2264 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 2265 | if (! h->def_regular) |
| 2266 | { |
| 2267 | /* Mark the symbol as undefined, rather than as defined in |
| 2268 | the .plt section. Leave the value alone. */ |
| 2269 | sym->st_shndx = SHN_UNDEF; |
| 2270 | /* If the symbol is weak, we do need to clear the value. |
| 2271 | Otherwise, the PLT entry would provide a definition for |
| 2272 | the symbol even if the symbol wasn't defined anywhere, |
| 2273 | and so the symbol would never be NULL. Leave the value if |
| 2274 | there were any relocations where pointer equality matters |
| 2275 | (this is a clue for the dynamic linker, to make function |
| 2276 | pointer comparisons work between an application and shared |
| 2277 | library). */ |
| 2278 | if (!h->ref_regular_nonweak || !h->pointer_equality_needed) |
| 2279 | sym->st_value = 0; |
| 2280 | } |
| 2281 | } |
| 2282 | |
| 2283 | /* Fill in the entry in the .got section. */ |
| 2284 | if (h->got.offset != (bfd_vma) -1 |
| 2285 | && ((csky_elf_hash_entry (h)->tls_type & GOT_TLS_GD) == 0) |
| 2286 | && ((csky_elf_hash_entry (h)->tls_type & GOT_TLS_IE) == 0)) |
| 2287 | { |
| 2288 | Elf_Internal_Rela rel; |
| 2289 | bfd_byte *loc; |
| 2290 | |
| 2291 | /* This symbol has an entry in the global offset table. |
| 2292 | Set it up. */ |
| 2293 | BFD_ASSERT (htab->elf.sgot != NULL && htab->elf.srelgot != NULL); |
| 2294 | |
| 2295 | rel.r_offset = (htab->elf.sgot->output_section->vma |
| 2296 | + htab->elf.sgot->output_offset |
| 2297 | + (h->got.offset & ~(bfd_vma) 1)); |
| 2298 | |
| 2299 | /* If this is a static link, or it is a -Bsymbolic link and the |
| 2300 | symbol is defined locally or was forced to be local because |
| 2301 | of a version file, we just want to emit a RELATIVE reloc. |
| 2302 | The entry in the global offset table will already have been |
| 2303 | initialized in the relocate_section function. */ |
| 2304 | if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 2305 | { |
| 2306 | BFD_ASSERT ((h->got.offset & 1) != 0); |
| 2307 | rel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE); |
| 2308 | rel.r_addend = (h->root.u.def.value |
| 2309 | + h->root.u.def.section->output_offset |
| 2310 | + h->root.u.def.section->output_section->vma); |
| 2311 | } |
| 2312 | else |
| 2313 | { |
| 2314 | BFD_ASSERT ((h->got.offset & 1) == 0); |
| 2315 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
| 2316 | htab->elf.sgot->contents + h->got.offset); |
| 2317 | rel.r_info = ELF32_R_INFO (h->dynindx, R_CKCORE_GLOB_DAT); |
| 2318 | rel.r_addend = 0; |
| 2319 | } |
| 2320 | |
| 2321 | loc = htab->elf.srelgot->contents; |
| 2322 | loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela); |
| 2323 | |
| 2324 | if (loc != NULL) |
| 2325 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
| 2326 | } |
| 2327 | |
| 2328 | if (h->needs_copy) |
| 2329 | { |
| 2330 | asection *s; |
| 2331 | Elf_Internal_Rela rela; |
| 2332 | bfd_byte *loc; |
| 2333 | |
| 2334 | /* This symbol needs a copy reloc. Set it up. */ |
| 2335 | BFD_ASSERT (h->dynindx != -1 |
| 2336 | && (h->root.type == bfd_link_hash_defined |
| 2337 | || h->root.type == bfd_link_hash_defweak)); |
| 2338 | |
| 2339 | rela.r_offset = (h->root.u.def.value |
| 2340 | + h->root.u.def.section->output_section->vma |
| 2341 | + h->root.u.def.section->output_offset); |
| 2342 | rela.r_info = ELF32_R_INFO (h->dynindx, R_CKCORE_COPY); |
| 2343 | rela.r_addend = 0; |
| 2344 | if (h->root.u.def.section == htab->elf.sdynrelro) |
| 2345 | s = htab->elf.sreldynrelro; |
| 2346 | else |
| 2347 | s = htab->elf.srelbss; |
| 2348 | BFD_ASSERT (s != NULL); |
| 2349 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela); |
| 2350 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| 2351 | } |
| 2352 | |
| 2353 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ |
| 2354 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 2355 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 2356 | sym->st_shndx = SHN_ABS; |
| 2357 | |
| 2358 | return TRUE; |
| 2359 | } |
| 2360 | |
| 2361 | /* Finish up the dynamic sections. */ |
| 2362 | |
| 2363 | static bfd_boolean |
| 2364 | csky_elf_finish_dynamic_sections (bfd *output_bfd, |
| 2365 | struct bfd_link_info *info) |
| 2366 | { |
| 2367 | struct csky_elf_link_hash_table *htab; |
| 2368 | bfd *dynobj; |
| 2369 | asection *sdyn; |
| 2370 | asection *got_sec; |
| 2371 | |
| 2372 | htab = csky_elf_hash_table (info); |
| 2373 | if (htab == NULL) |
| 2374 | return FALSE; |
| 2375 | |
| 2376 | dynobj = htab->elf.dynobj; |
| 2377 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 2378 | |
| 2379 | if (htab->elf.dynamic_sections_created) |
| 2380 | { |
| 2381 | Elf32_External_Dyn *dyncon, *dynconend; |
| 2382 | |
| 2383 | BFD_ASSERT (sdyn != NULL && htab->elf.sgot != NULL); |
| 2384 | |
| 2385 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 2386 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| 2387 | for (; dyncon < dynconend; dyncon++) |
| 2388 | { |
| 2389 | Elf_Internal_Dyn dyn; |
| 2390 | bfd_boolean size = FALSE; |
| 2391 | const char *name = NULL; |
| 2392 | |
| 2393 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 2394 | switch (dyn.d_tag) |
| 2395 | { |
| 2396 | default: |
| 2397 | continue; |
| 2398 | case DT_RELA: |
| 2399 | name = ".rela.dyn"; |
| 2400 | size = FALSE; |
| 2401 | break; |
| 2402 | case DT_RELASZ: |
| 2403 | name = ".rela.dyn"; |
| 2404 | size = TRUE; |
| 2405 | break; |
| 2406 | case DT_PLTRELSZ: |
| 2407 | name = ".rela.plt"; |
| 2408 | size = TRUE; |
| 2409 | break; |
| 2410 | case DT_PLTGOT: |
| 2411 | dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma; |
| 2412 | break; |
| 2413 | case DT_JMPREL: |
| 2414 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma |
| 2415 | + htab->elf.srelplt->output_offset; |
| 2416 | break; |
| 2417 | } |
| 2418 | |
| 2419 | if (name != NULL) |
| 2420 | { |
| 2421 | asection *s = bfd_get_section_by_name (output_bfd, name); |
| 2422 | |
| 2423 | if (s == NULL) |
| 2424 | dyn.d_un.d_val = 0; |
| 2425 | else if (!size) |
| 2426 | dyn.d_un.d_ptr = s->vma; |
| 2427 | else |
| 2428 | dyn.d_un.d_val = s->size; |
| 2429 | } |
| 2430 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 2431 | } |
| 2432 | } |
| 2433 | |
| 2434 | /* Fill in the first three entries in the global offset table. */ |
| 2435 | if (htab->elf.sgotplt) |
| 2436 | got_sec = htab->elf.sgotplt; |
| 2437 | else |
| 2438 | got_sec = htab->elf.sgot; |
| 2439 | if (got_sec != NULL) |
| 2440 | { |
| 2441 | if (got_sec->size > 0) |
| 2442 | { |
| 2443 | bfd_put_32 (output_bfd, |
| 2444 | (sdyn == NULL ? (bfd_vma) 0 |
| 2445 | : sdyn->output_section->vma + sdyn->output_offset), |
| 2446 | got_sec->contents); |
| 2447 | bfd_put_32 (output_bfd, (bfd_vma) 0, got_sec->contents + 4); |
| 2448 | bfd_put_32 (output_bfd, (bfd_vma) 0, got_sec->contents + 8); |
| 2449 | } |
| 2450 | elf_section_data (got_sec->output_section)->this_hdr.sh_entsize = 4; |
| 2451 | } |
| 2452 | return TRUE; |
| 2453 | } |
| 2454 | |
| 2455 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| 2456 | |
| 2457 | static void |
| 2458 | csky_elf_copy_indirect_symbol (struct bfd_link_info *info, |
| 2459 | struct elf_link_hash_entry *dir, |
| 2460 | struct elf_link_hash_entry *ind) |
| 2461 | { |
| 2462 | struct csky_elf_link_hash_entry *edir, *eind; |
| 2463 | |
| 2464 | edir = (struct csky_elf_link_hash_entry *) dir; |
| 2465 | eind = (struct csky_elf_link_hash_entry *) ind; |
| 2466 | |
| 2467 | if (eind->dyn_relocs != NULL) |
| 2468 | { |
| 2469 | if (edir->dyn_relocs != NULL) |
| 2470 | { |
| 2471 | struct elf_dyn_relocs **pp; |
| 2472 | struct elf_dyn_relocs *p; |
| 2473 | |
| 2474 | /* Add reloc counts against the indirect sym to the direct sym |
| 2475 | list. Merge any entries against the same section. */ |
| 2476 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| 2477 | { |
| 2478 | struct elf_dyn_relocs *q; |
| 2479 | |
| 2480 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| 2481 | if (q->sec == p->sec) |
| 2482 | { |
| 2483 | q->pc_count += p->pc_count; |
| 2484 | q->count += p->count; |
| 2485 | *pp = p->next; |
| 2486 | break; |
| 2487 | } |
| 2488 | if (q == NULL) |
| 2489 | pp = &p->next; |
| 2490 | } |
| 2491 | *pp = edir->dyn_relocs; |
| 2492 | } |
| 2493 | edir->dyn_relocs = eind->dyn_relocs; |
| 2494 | eind->dyn_relocs = NULL; |
| 2495 | } |
| 2496 | if (ind->root.type == bfd_link_hash_indirect |
| 2497 | && dir->got.refcount <= 0) |
| 2498 | { |
| 2499 | edir->tls_type = eind->tls_type; |
| 2500 | eind->tls_type = GOT_UNKNOWN; |
| 2501 | } |
| 2502 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
| 2503 | } |
| 2504 | |
| 2505 | /* Used to decide how to sort relocs in an optimal manner for the |
| 2506 | dynamic linker, before writing them out. */ |
| 2507 | |
| 2508 | static enum elf_reloc_type_class |
| 2509 | csky_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 2510 | const asection *rel_sec ATTRIBUTE_UNUSED, |
| 2511 | const Elf_Internal_Rela *rela) |
| 2512 | { |
| 2513 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 2514 | { |
| 2515 | case R_CKCORE_RELATIVE: |
| 2516 | return reloc_class_relative; |
| 2517 | case R_CKCORE_JUMP_SLOT: |
| 2518 | return reloc_class_plt; |
| 2519 | case R_CKCORE_COPY: |
| 2520 | return reloc_class_copy; |
| 2521 | case R_CKCORE_IRELATIVE: |
| 2522 | return reloc_class_ifunc; |
| 2523 | default: |
| 2524 | return reloc_class_normal; |
| 2525 | } |
| 2526 | } |
| 2527 | |
| 2528 | /* Return the section that should be marked against GC for a given |
| 2529 | relocation. */ |
| 2530 | |
| 2531 | static asection * |
| 2532 | csky_elf_gc_mark_hook (asection *sec, |
| 2533 | struct bfd_link_info *info, |
| 2534 | Elf_Internal_Rela *rel, |
| 2535 | struct elf_link_hash_entry *h, |
| 2536 | Elf_Internal_Sym *sym) |
| 2537 | { |
| 2538 | if (h != NULL) |
| 2539 | { |
| 2540 | switch (ELF32_R_TYPE (rel->r_info)) |
| 2541 | { |
| 2542 | case R_CKCORE_GNU_VTINHERIT: |
| 2543 | case R_CKCORE_GNU_VTENTRY: |
| 2544 | return NULL; |
| 2545 | } |
| 2546 | } |
| 2547 | |
| 2548 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| 2549 | } |
| 2550 | |
| 2551 | /* Look through the relocs for a section during the first phase. |
| 2552 | Since we don't do .gots or .plts, we just need to consider the |
| 2553 | virtual table relocs for gc. */ |
| 2554 | |
| 2555 | static bfd_boolean |
| 2556 | csky_elf_check_relocs (bfd * abfd, |
| 2557 | struct bfd_link_info * info, |
| 2558 | asection * sec, |
| 2559 | const Elf_Internal_Rela * relocs) |
| 2560 | { |
| 2561 | Elf_Internal_Shdr * symtab_hdr; |
| 2562 | struct elf_link_hash_entry ** sym_hashes; |
| 2563 | const Elf_Internal_Rela * rel; |
| 2564 | const Elf_Internal_Rela * rel_end; |
| 2565 | struct csky_elf_link_hash_table *htab; |
| 2566 | asection *sreloc; |
| 2567 | |
| 2568 | /* if output type is relocatable, return. */ |
| 2569 | if (bfd_link_relocatable (info)) |
| 2570 | return TRUE; |
| 2571 | |
| 2572 | htab = csky_elf_hash_table (info); |
| 2573 | if (htab == NULL) |
| 2574 | return FALSE; |
| 2575 | |
| 2576 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| 2577 | sym_hashes = elf_sym_hashes (abfd); |
| 2578 | |
| 2579 | rel_end = relocs + sec->reloc_count; |
| 2580 | sreloc = NULL; |
| 2581 | for (rel = relocs; rel < rel_end; rel++) |
| 2582 | { |
| 2583 | struct elf_link_hash_entry *h; |
| 2584 | unsigned long r_symndx; |
| 2585 | Elf_Internal_Sym *isym; |
| 2586 | int r_type; |
| 2587 | |
| 2588 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 2589 | r_type = ELF32_R_TYPE (rel->r_info); |
| 2590 | if (r_symndx < symtab_hdr->sh_info) |
| 2591 | { |
| 2592 | /* A local symbol. */ |
| 2593 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 2594 | abfd, r_symndx); |
| 2595 | if (isym == NULL) |
| 2596 | return FALSE; |
| 2597 | h = NULL; |
| 2598 | } |
| 2599 | else |
| 2600 | { |
| 2601 | isym = NULL; |
| 2602 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 2603 | while (h->root.type == bfd_link_hash_indirect |
| 2604 | || h->root.type == bfd_link_hash_warning) |
| 2605 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 2606 | } |
| 2607 | |
| 2608 | switch (r_type) |
| 2609 | { |
| 2610 | case R_CKCORE_PCREL_IMM26BY2: |
| 2611 | case R_CKCORE_PCREL_IMM11BY2: |
| 2612 | case R_CKCORE_PCREL_JSR_IMM11BY2: |
| 2613 | case R_CKCORE_PCREL_JSR_IMM26BY2: |
| 2614 | /* If the symbol is '*UND*', means this reloc is used for |
| 2615 | * callgraph, don't need to leave to shared object. */ |
| 2616 | if (r_symndx == 0) |
| 2617 | break; |
| 2618 | /* Else fall through. */ |
| 2619 | case R_CKCORE_ADDR32: |
| 2620 | case R_CKCORE_ADDR_HI16: |
| 2621 | case R_CKCORE_ADDR_LO16: |
| 2622 | if (h != NULL |
| 2623 | && bfd_link_executable (info) |
| 2624 | && r_type == R_CKCORE_ADDR32 |
| 2625 | && h->type == STT_OBJECT |
| 2626 | && (sec->flags & SEC_ALLOC) != 0 |
| 2627 | && (sec->flags & SEC_READONLY)) |
| 2628 | /* If this reloc is in a read-only section, we might |
| 2629 | need a copy reloc. We can't check reliably at this |
| 2630 | stage whether the section is read-only, as input |
| 2631 | sections have not yet been mapped to output sections. |
| 2632 | Tentatively set the flag for now, and correct in |
| 2633 | adjust_dynamic_symbol. */ |
| 2634 | h->non_got_ref = 1; |
| 2635 | |
| 2636 | /* If we are creating a shared library or relocatable executable, |
| 2637 | and this is a reloc against a global symbol, then we need to |
| 2638 | copy the reloc into the shared library. However, if we are |
| 2639 | linking with -Bsymbolic, we do not need to copy a reloc |
| 2640 | against a global symbol which is defined in an object we are |
| 2641 | including in the link (i.e., DEF_REGULAR is set). At |
| 2642 | this point we have not seen all the input files, so it is |
| 2643 | possible that DEF_REGULAR is not set now but will be set |
| 2644 | later (it is never cleared). We account for that possibility |
| 2645 | below by storing information in the relocs_copied field of |
| 2646 | the hash table entry. */ |
| 2647 | if ((bfd_link_pic (info) && (sec->flags & SEC_ALLOC) != 0) |
| 2648 | || (!bfd_link_pic (info) |
| 2649 | && (sec->flags & SEC_ALLOC) != 0 |
| 2650 | && h != NULL |
| 2651 | && (h->root.type == bfd_link_hash_defweak |
| 2652 | || !h->def_regular))) |
| 2653 | { |
| 2654 | struct elf_dyn_relocs *p; |
| 2655 | struct elf_dyn_relocs **head; |
| 2656 | /* We must copy these reloc types into the output file. |
| 2657 | Create a reloc section in dynobj and make room for |
| 2658 | this reloc. */ |
| 2659 | if (sreloc == NULL) |
| 2660 | { |
| 2661 | if (htab->elf.dynobj == NULL) |
| 2662 | htab->elf.dynobj = abfd; |
| 2663 | |
| 2664 | sreloc = _bfd_elf_make_dynamic_reloc_section |
| 2665 | (sec, htab->elf.dynobj, 2, abfd, TRUE); |
| 2666 | |
| 2667 | if (sreloc == NULL) |
| 2668 | return FALSE; |
| 2669 | } |
| 2670 | |
| 2671 | if (h == NULL && !use_branch_stub |
| 2672 | && ((ELF32_R_TYPE (rel->r_info) |
| 2673 | == R_CKCORE_PCREL_IMM26BY2) |
| 2674 | || (ELF32_R_TYPE (rel->r_info) |
| 2675 | == R_CKCORE_PCREL_IMM11BY2))) |
| 2676 | break; |
| 2677 | |
| 2678 | /* If this is a global symbol, we count the number of |
| 2679 | relocations we need for this symbol. */ |
| 2680 | if (h != NULL) |
| 2681 | { |
| 2682 | struct csky_elf_link_hash_entry *eh; |
| 2683 | eh = (struct csky_elf_link_hash_entry *)h; |
| 2684 | if ((ELF32_R_TYPE (rel->r_info) |
| 2685 | == R_CKCORE_PCREL_JSR_IMM26BY2) |
| 2686 | || (ELF32_R_TYPE (rel->r_info) |
| 2687 | == R_CKCORE_PCREL_JSR_IMM11BY2)) |
| 2688 | eh->jsri2bsr_refcount += 1; |
| 2689 | head = &eh->dyn_relocs; |
| 2690 | } |
| 2691 | else |
| 2692 | { |
| 2693 | /* Track dynamic relocs needed for local syms too. |
| 2694 | We really need local syms available to do this |
| 2695 | easily. Oh well. */ |
| 2696 | void **vpp; |
| 2697 | asection *s; |
| 2698 | Elf_Internal_Sym *loc_isym; |
| 2699 | |
| 2700 | loc_isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
| 2701 | abfd, r_symndx); |
| 2702 | if (loc_isym == NULL) |
| 2703 | return FALSE; |
| 2704 | s = bfd_section_from_elf_index (abfd, loc_isym->st_shndx); |
| 2705 | if (s == NULL) |
| 2706 | s = sec; |
| 2707 | vpp = &elf_section_data (s)->local_dynrel; |
| 2708 | head = (struct elf_dyn_relocs **)vpp; |
| 2709 | } |
| 2710 | |
| 2711 | p = *head; |
| 2712 | if (p == NULL || p->sec != sec) |
| 2713 | { |
| 2714 | bfd_size_type amt = sizeof *p; |
| 2715 | p = ((struct elf_dyn_relocs *) |
| 2716 | bfd_alloc (htab->elf.dynobj, amt)); |
| 2717 | if (p == NULL) |
| 2718 | return FALSE; |
| 2719 | p->next = *head; |
| 2720 | *head = p; |
| 2721 | p->sec = sec; |
| 2722 | p->count = 0; |
| 2723 | p->pc_count = 0; |
| 2724 | } |
| 2725 | |
| 2726 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_IMM26BY2 |
| 2727 | || ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_IMM11BY2) |
| 2728 | p->pc_count += 1; |
| 2729 | p->count += 1; |
| 2730 | } |
| 2731 | break; |
| 2732 | |
| 2733 | case R_CKCORE_PLT_IMM18BY4: |
| 2734 | case R_CKCORE_PLT32: |
| 2735 | /* This symbol requires a procedure linkage table entry. We |
| 2736 | actually build the entry in adjust_dynamic_symbol, |
| 2737 | because this might be a case of linking PIC code which is |
| 2738 | never referenced by a dynamic object, in which case we |
| 2739 | don't need to generate a procedure linkage table entry |
| 2740 | after all. */ |
| 2741 | |
| 2742 | /* If this is a local symbol, we resolve it directly without |
| 2743 | creating a procedure linkage table entry. */ |
| 2744 | if (h == NULL) |
| 2745 | continue; |
| 2746 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_PLT_IMM18BY4) |
| 2747 | check_got_overflow = 1; |
| 2748 | |
| 2749 | h->needs_plt = 1; |
| 2750 | h->plt.refcount += 1; |
| 2751 | h->got.refcount += 1; |
| 2752 | ((struct csky_elf_link_hash_entry *)h)->plt_refcount += 1; |
| 2753 | break; |
| 2754 | |
| 2755 | case R_CKCORE_GOT12: |
| 2756 | case R_CKCORE_PLT12: |
| 2757 | case R_CKCORE_GOT32: |
| 2758 | case R_CKCORE_GOT_HI16: |
| 2759 | case R_CKCORE_GOT_LO16: |
| 2760 | case R_CKCORE_PLT_HI16: |
| 2761 | case R_CKCORE_PLT_LO16: |
| 2762 | case R_CKCORE_GOT_IMM18BY4: |
| 2763 | case R_CKCORE_TLS_IE32: |
| 2764 | case R_CKCORE_TLS_GD32: |
| 2765 | { |
| 2766 | int tls_type, old_tls_type; |
| 2767 | |
| 2768 | if (h != NULL |
| 2769 | && bfd_link_executable (info) |
| 2770 | && r_type == R_CKCORE_GOT_IMM18BY4 |
| 2771 | && (sec->flags & SEC_ALLOC) != 0 |
| 2772 | && (sec->flags & SEC_READONLY)) |
| 2773 | /* If this reloc is in a read-only section, we might |
| 2774 | need a copy reloc. We can't check reliably at this |
| 2775 | stage whether the section is read-only, as input |
| 2776 | sections have not yet been mapped to output sections. |
| 2777 | Tentatively set the flag for now, and correct in |
| 2778 | adjust_dynamic_symbol. */ |
| 2779 | h->non_got_ref = 1; |
| 2780 | |
| 2781 | switch (ELF32_R_TYPE (rel->r_info)) |
| 2782 | { |
| 2783 | case R_CKCORE_TLS_IE32: |
| 2784 | tls_type = GOT_TLS_IE; |
| 2785 | break; |
| 2786 | case R_CKCORE_TLS_GD32: |
| 2787 | tls_type = GOT_TLS_GD; |
| 2788 | break; |
| 2789 | default: |
| 2790 | tls_type = GOT_NORMAL; |
| 2791 | break; |
| 2792 | } |
| 2793 | if (h != NULL) |
| 2794 | { |
| 2795 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_GOT_IMM18BY4) |
| 2796 | check_got_overflow = 1; |
| 2797 | h->got.refcount += 1; |
| 2798 | old_tls_type = csky_elf_hash_entry (h)->tls_type; |
| 2799 | } |
| 2800 | else |
| 2801 | { |
| 2802 | bfd_signed_vma *local_got_refcounts; |
| 2803 | |
| 2804 | /* This is a global offset table entry for a local symbol. */ |
| 2805 | /* we can write a new function named |
| 2806 | elf32_csky_allocate_local_sym_info() to replace |
| 2807 | following code. */ |
| 2808 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 2809 | if (local_got_refcounts == NULL) |
| 2810 | { |
| 2811 | bfd_size_type size; |
| 2812 | |
| 2813 | size = symtab_hdr->sh_info; |
| 2814 | size *= (sizeof (bfd_signed_vma) + sizeof (char)); |
| 2815 | local_got_refcounts = ((bfd_signed_vma *) |
| 2816 | bfd_zalloc (abfd, size)); |
| 2817 | if (local_got_refcounts == NULL) |
| 2818 | return FALSE; |
| 2819 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
| 2820 | csky_elf_local_got_tls_type (abfd) |
| 2821 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); |
| 2822 | } |
| 2823 | local_got_refcounts[r_symndx] += 1; |
| 2824 | old_tls_type = csky_elf_local_got_tls_type (abfd)[r_symndx]; |
| 2825 | } |
| 2826 | |
| 2827 | /* We will already have issued an error message if there is a |
| 2828 | TLS / non-TLS mismatch, based on the symbol type. We don't |
| 2829 | support any linker relaxations. So just combine any TLS |
| 2830 | types needed. */ |
| 2831 | if (old_tls_type != GOT_UNKNOWN && old_tls_type != GOT_NORMAL |
| 2832 | && tls_type != GOT_NORMAL) |
| 2833 | tls_type |= old_tls_type; |
| 2834 | |
| 2835 | if (old_tls_type != tls_type) |
| 2836 | { |
| 2837 | if (h != NULL) |
| 2838 | csky_elf_hash_entry (h)->tls_type = tls_type; |
| 2839 | else |
| 2840 | csky_elf_local_got_tls_type (abfd)[r_symndx] = tls_type; |
| 2841 | } |
| 2842 | } |
| 2843 | /* Fall through. */ |
| 2844 | |
| 2845 | case R_CKCORE_TLS_LDM32: |
| 2846 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_TLS_LDM32) |
| 2847 | htab->tls_ldm_got.refcount++; |
| 2848 | /* Fall through. */ |
| 2849 | |
| 2850 | case R_CKCORE_GOTOFF: |
| 2851 | case R_CKCORE_GOTPC: |
| 2852 | case R_CKCORE_GOTOFF_HI16: |
| 2853 | case R_CKCORE_GOTOFF_LO16: |
| 2854 | case R_CKCORE_GOTPC_HI16: |
| 2855 | case R_CKCORE_GOTPC_LO16: |
| 2856 | case R_CKCORE_GOTOFF_IMM18: |
| 2857 | if (htab->elf.sgot == NULL) |
| 2858 | { |
| 2859 | if (htab->elf.dynobj == NULL) |
| 2860 | htab->elf.dynobj = abfd; |
| 2861 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
| 2862 | return FALSE; |
| 2863 | } |
| 2864 | break; |
| 2865 | |
| 2866 | /* This relocation describes the C++ object vtable hierarchy. |
| 2867 | Reconstruct it for later use during GC. */ |
| 2868 | case R_CKCORE_GNU_VTINHERIT: |
| 2869 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 2870 | return FALSE; |
| 2871 | break; |
| 2872 | |
| 2873 | /* This relocation describes which C++ vtable entries are actually |
| 2874 | used. Record for later use during GC. */ |
| 2875 | case R_CKCORE_GNU_VTENTRY: |
| 2876 | BFD_ASSERT (h != NULL); |
| 2877 | if (h != NULL |
| 2878 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 2879 | return FALSE; |
| 2880 | break; |
| 2881 | } |
| 2882 | } |
| 2883 | |
| 2884 | return TRUE; |
| 2885 | } |
| 2886 | |
| 2887 | static const struct bfd_elf_special_section csky_elf_special_sections[]= |
| 2888 | { |
| 2889 | { STRING_COMMA_LEN (".ctors"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 2890 | { STRING_COMMA_LEN (".dtors"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
| 2891 | { NULL, 0, 0, 0, 0 } |
| 2892 | }; |
| 2893 | |
| 2894 | /* Function to keep CSKY specific flags in the ELF header. */ |
| 2895 | |
| 2896 | static bfd_boolean |
| 2897 | csky_elf_set_private_flags (bfd * abfd, flagword flags) |
| 2898 | { |
| 2899 | BFD_ASSERT (! elf_flags_init (abfd) |
| 2900 | || elf_elfheader (abfd)->e_flags == flags); |
| 2901 | |
| 2902 | elf_elfheader (abfd)->e_flags = flags; |
| 2903 | elf_flags_init (abfd) = TRUE; |
| 2904 | return TRUE; |
| 2905 | } |
| 2906 | |
| 2907 | static csky_arch_for_merge * |
| 2908 | csky_find_arch_with_eflag (const unsigned long arch_eflag) |
| 2909 | { |
| 2910 | csky_arch_for_merge *csky_arch = NULL; |
| 2911 | |
| 2912 | for (csky_arch = csky_archs; csky_arch->name != NULL; csky_arch++) |
| 2913 | if (csky_arch->arch_eflag == arch_eflag) |
| 2914 | break; |
| 2915 | if (csky_arch == NULL) |
| 2916 | { |
| 2917 | _bfd_error_handler (_("warning: unrecognized arch eflag '%#lx'"), |
| 2918 | arch_eflag); |
| 2919 | bfd_set_error (bfd_error_wrong_format); |
| 2920 | } |
| 2921 | return csky_arch; |
| 2922 | } |
| 2923 | |
| 2924 | /* Merge backend specific data from an object file to the output |
| 2925 | object file when linking. */ |
| 2926 | |
| 2927 | static bfd_boolean |
| 2928 | csky_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 2929 | { |
| 2930 | bfd *obfd = info->output_bfd; |
| 2931 | flagword old_flags; |
| 2932 | flagword new_flags; |
| 2933 | csky_arch_for_merge *old_arch = NULL; |
| 2934 | csky_arch_for_merge *new_arch = NULL; |
| 2935 | |
| 2936 | /* Check if we have the same endianness. */ |
| 2937 | if (! _bfd_generic_verify_endian_match (ibfd, info)) |
| 2938 | return FALSE; |
| 2939 | |
| 2940 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 2941 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 2942 | return TRUE; |
| 2943 | |
| 2944 | new_flags = elf_elfheader (ibfd)->e_flags; |
| 2945 | old_flags = elf_elfheader (obfd)->e_flags; |
| 2946 | |
| 2947 | if (! elf_flags_init (obfd)) |
| 2948 | { |
| 2949 | /* First call, no flags set. */ |
| 2950 | elf_flags_init (obfd) = TRUE; |
| 2951 | elf_elfheader (obfd)->e_flags = new_flags; |
| 2952 | } |
| 2953 | else if (new_flags == old_flags) |
| 2954 | /* Do nothing. */ |
| 2955 | ; |
| 2956 | else if (new_flags == 0 || old_flags == 0) |
| 2957 | /* When one flag is 0, assign the other one's flag. */ |
| 2958 | elf_elfheader (obfd)->e_flags = new_flags | old_flags; |
| 2959 | else |
| 2960 | { |
| 2961 | flagword newest_flag = 0; |
| 2962 | |
| 2963 | if ((new_flags & CSKY_ARCH_MASK) != 0 |
| 2964 | && (old_flags & CSKY_ARCH_MASK) != 0) |
| 2965 | { |
| 2966 | new_arch = csky_find_arch_with_eflag (new_flags & CSKY_ARCH_MASK); |
| 2967 | old_arch = csky_find_arch_with_eflag (old_flags & CSKY_ARCH_MASK); |
| 2968 | /* Collect flags like e, f, g. */ |
| 2969 | newest_flag = (old_flags & (~CSKY_ARCH_MASK)) |
| 2970 | | (new_flags & (~CSKY_ARCH_MASK)); |
| 2971 | if (new_arch != NULL && old_arch != NULL) |
| 2972 | { |
| 2973 | if (new_arch->class != old_arch->class) |
| 2974 | { |
| 2975 | _bfd_error_handler |
| 2976 | /* xgettext:c-format */ |
| 2977 | (_("%pB: machine flag conflict with target"), ibfd); |
| 2978 | bfd_set_error (bfd_error_wrong_format); |
| 2979 | return FALSE; |
| 2980 | } |
| 2981 | else if (new_arch->class_level != old_arch->class_level) |
| 2982 | { |
| 2983 | csky_arch_for_merge *newest_arch |
| 2984 | = (new_arch->class_level > old_arch->class_level |
| 2985 | ? new_arch : old_arch); |
| 2986 | if (new_arch->do_warning || old_arch->do_warning) |
| 2987 | { |
| 2988 | _bfd_error_handler |
| 2989 | /* xgettext:c-format */ |
| 2990 | (_("warning: file %pB's arch flag ck%s conflicts with " |
| 2991 | "target ck%s, using ck%s"), |
| 2992 | ibfd, new_arch->name, old_arch->name, |
| 2993 | newest_arch->name); |
| 2994 | bfd_set_error (bfd_error_wrong_format); |
| 2995 | } |
| 2996 | |
| 2997 | newest_flag |= newest_arch->arch_eflag; |
| 2998 | } |
| 2999 | else |
| 3000 | newest_flag |= ((new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)) |
| 3001 | | (old_flags |
| 3002 | & (CSKY_ARCH_MASK | CSKY_ABI_MASK))); |
| 3003 | } |
| 3004 | else |
| 3005 | newest_flag |= ((new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)) |
| 3006 | | (old_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK))); |
| 3007 | } |
| 3008 | else |
| 3009 | newest_flag |= ((new_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK)) |
| 3010 | | (old_flags & (CSKY_ARCH_MASK | CSKY_ABI_MASK))); |
| 3011 | |
| 3012 | elf_elfheader (obfd)->e_flags = newest_flag; |
| 3013 | } |
| 3014 | return TRUE; |
| 3015 | } |
| 3016 | |
| 3017 | /* Ignore the discarded relocs in special sections in link time. */ |
| 3018 | |
| 3019 | static bfd_boolean |
| 3020 | csky_elf_ignore_discarded_relocs (asection *sec) |
| 3021 | { |
| 3022 | if (strcmp (sec->name, ".csky_stack_size") == 0) |
| 3023 | return TRUE; |
| 3024 | return FALSE; |
| 3025 | } |
| 3026 | |
| 3027 | /* .csky_stack_size are not referenced directly. This pass marks all of |
| 3028 | them as required. */ |
| 3029 | |
| 3030 | static bfd_boolean |
| 3031 | elf32_csky_gc_mark_extra_sections (struct bfd_link_info *info, |
| 3032 | elf_gc_mark_hook_fn gc_mark_hook ATTRIBUTE_UNUSED) |
| 3033 | { |
| 3034 | bfd *sub; |
| 3035 | |
| 3036 | _bfd_elf_gc_mark_extra_sections (info, gc_mark_hook); |
| 3037 | |
| 3038 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
| 3039 | { |
| 3040 | asection *o; |
| 3041 | |
| 3042 | for (o = sub->sections; o != NULL; o = o->next) |
| 3043 | if (strcmp (o->name, ".csky_stack_size") == 0) |
| 3044 | o->gc_mark = 1; |
| 3045 | } |
| 3046 | |
| 3047 | return TRUE; |
| 3048 | } |
| 3049 | |
| 3050 | /* The linker repeatedly calls this function for each input section, |
| 3051 | in the order that input sections are linked into output sections. |
| 3052 | Build lists of input sections to determine groupings between which |
| 3053 | we may insert linker stubs. */ |
| 3054 | |
| 3055 | void |
| 3056 | elf32_csky_next_input_section (struct bfd_link_info *info, |
| 3057 | asection *isec) |
| 3058 | { |
| 3059 | struct csky_elf_link_hash_table *htab = csky_elf_hash_table (info); |
| 3060 | if (htab == NULL) |
| 3061 | return; |
| 3062 | if (isec->output_section->index <= htab->top_index) |
| 3063 | { |
| 3064 | asection **list = htab->input_list + isec->output_section->index; |
| 3065 | |
| 3066 | if (*list != bfd_abs_section_ptr) |
| 3067 | { |
| 3068 | /* Steal the link_sec pointer for our list. */ |
| 3069 | #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| 3070 | /* This happens to make the list in reverse order, |
| 3071 | which we reverse later in group_sections. */ |
| 3072 | PREV_SEC (isec) = *list; |
| 3073 | *list = isec; |
| 3074 | } |
| 3075 | } |
| 3076 | } |
| 3077 | |
| 3078 | /* See whether we can group stub sections together. Grouping stub |
| 3079 | sections may result in fewer stubs. More importantly, we need to |
| 3080 | put all .init* and .fini* stubs at the end of the .init or |
| 3081 | .fini output sections respectively, because glibc splits the |
| 3082 | _init and _fini functions into multiple parts. Putting a stub in |
| 3083 | the middle of a function is not a good idea. */ |
| 3084 | |
| 3085 | static void |
| 3086 | group_sections (struct csky_elf_link_hash_table *htab, |
| 3087 | bfd_size_type stub_group_size, |
| 3088 | bfd_boolean stubs_always_after_branch) |
| 3089 | { |
| 3090 | asection **list = htab->input_list; |
| 3091 | |
| 3092 | do |
| 3093 | { |
| 3094 | asection *tail = *list; |
| 3095 | asection *head; |
| 3096 | |
| 3097 | if (tail == bfd_abs_section_ptr) |
| 3098 | continue; |
| 3099 | |
| 3100 | /* Reverse the list: we must avoid placing stubs at the |
| 3101 | beginning of the section because the beginning of the text |
| 3102 | section may be required for an interrupt vector in bare metal |
| 3103 | code. */ |
| 3104 | #define NEXT_SEC PREV_SEC |
| 3105 | head = NULL; |
| 3106 | while (tail != NULL) |
| 3107 | { |
| 3108 | /* Pop from tail. */ |
| 3109 | asection *item = tail; |
| 3110 | tail = PREV_SEC (item); |
| 3111 | |
| 3112 | /* Push on head. */ |
| 3113 | NEXT_SEC (item) = head; |
| 3114 | head = item; |
| 3115 | } |
| 3116 | |
| 3117 | while (head != NULL) |
| 3118 | { |
| 3119 | asection *curr; |
| 3120 | asection *next; |
| 3121 | bfd_vma stub_group_start = head->output_offset; |
| 3122 | bfd_vma end_of_next; |
| 3123 | |
| 3124 | curr = head; |
| 3125 | while (NEXT_SEC (curr) != NULL) |
| 3126 | { |
| 3127 | next = NEXT_SEC (curr); |
| 3128 | end_of_next = next->output_offset + next->size; |
| 3129 | if (end_of_next - stub_group_start >= stub_group_size) |
| 3130 | /* End of NEXT is too far from start, so stop. */ |
| 3131 | break; |
| 3132 | curr = next; |
| 3133 | } |
| 3134 | |
| 3135 | /* OK, the size from the start to the start of CURR is less |
| 3136 | * than stub_group_size and thus can be handled by one stub |
| 3137 | * section. (Or the head section is itself larger than |
| 3138 | * stub_group_size, in which case we may be toast.) |
| 3139 | * We should really be keeping track of the total size of |
| 3140 | * stubs added here, as stubs contribute to the final output |
| 3141 | * section size. */ |
| 3142 | do |
| 3143 | { |
| 3144 | next = NEXT_SEC (head); |
| 3145 | /* Set up this stub group. */ |
| 3146 | htab->stub_group[head->id].link_sec = curr; |
| 3147 | } |
| 3148 | while (head != curr && (head = next) != NULL); |
| 3149 | |
| 3150 | /* But wait, there's more! Input sections up to stub_group_size |
| 3151 | * bytes after the stub section can be handled by it too. */ |
| 3152 | if (!stubs_always_after_branch) |
| 3153 | { |
| 3154 | stub_group_start = curr->output_offset + curr->size; |
| 3155 | |
| 3156 | while (next != NULL) |
| 3157 | { |
| 3158 | end_of_next = next->output_offset + next->size; |
| 3159 | if (end_of_next - stub_group_start >= stub_group_size) |
| 3160 | /* End of NEXT is too far from stubs, so stop. */ |
| 3161 | break; |
| 3162 | /* Add NEXT to the stub group. */ |
| 3163 | head = next; |
| 3164 | next = NEXT_SEC (head); |
| 3165 | htab->stub_group[head->id].link_sec = curr; |
| 3166 | } |
| 3167 | } |
| 3168 | head = next; |
| 3169 | } |
| 3170 | } |
| 3171 | while (list++ != htab->input_list + htab->top_index); |
| 3172 | |
| 3173 | free (htab->input_list); |
| 3174 | #undef PREV_SEC |
| 3175 | #undef NEXT_SEC |
| 3176 | } |
| 3177 | |
| 3178 | /* If the symbol referenced by bsr is defined in shared object file, |
| 3179 | or it is a weak symbol and we aim to create shared object file, |
| 3180 | we must create a stub for this bsr. */ |
| 3181 | |
| 3182 | static bfd_boolean |
| 3183 | sym_must_create_stub (struct elf_link_hash_entry *h, |
| 3184 | struct bfd_link_info *info) |
| 3185 | { |
| 3186 | if (h != NULL |
| 3187 | && ((h->def_dynamic && !h->def_regular) |
| 3188 | || (bfd_link_pic (info) && h->root.type == bfd_link_hash_defweak))) |
| 3189 | return TRUE; |
| 3190 | else |
| 3191 | return FALSE; |
| 3192 | } |
| 3193 | |
| 3194 | /* Calculate the template, template size and instruction size for a stub. |
| 3195 | Return value is the instruction size. */ |
| 3196 | |
| 3197 | static unsigned int |
| 3198 | find_stub_size_and_template (enum elf32_csky_stub_type stub_type, |
| 3199 | const insn_sequence **stub_template, |
| 3200 | int *stub_template_size) |
| 3201 | { |
| 3202 | const insn_sequence *template_sequence = NULL; |
| 3203 | int template_size = 0; |
| 3204 | int i; |
| 3205 | unsigned int size; |
| 3206 | |
| 3207 | template_sequence = stub_definitions[stub_type].template_sequence; |
| 3208 | template_size = stub_definitions[stub_type].template_size; |
| 3209 | |
| 3210 | size = 0; |
| 3211 | for (i = 0; i < template_size; i++) |
| 3212 | { |
| 3213 | switch (template_sequence[i].type) |
| 3214 | { |
| 3215 | case INSN16: |
| 3216 | size += 2; |
| 3217 | break; |
| 3218 | |
| 3219 | case INSN32: |
| 3220 | case DATA_TYPE: |
| 3221 | size += 4; |
| 3222 | break; |
| 3223 | |
| 3224 | default: |
| 3225 | BFD_FAIL (); |
| 3226 | return FALSE; |
| 3227 | } |
| 3228 | } |
| 3229 | |
| 3230 | if (stub_template) |
| 3231 | *stub_template = template_sequence; |
| 3232 | if (stub_template_size) |
| 3233 | *stub_template_size = template_size; |
| 3234 | |
| 3235 | return size; |
| 3236 | } |
| 3237 | |
| 3238 | /* As above, but don't actually build the stub. Just bump offset so |
| 3239 | we know stub section sizes. */ |
| 3240 | |
| 3241 | static bfd_boolean |
| 3242 | csky_size_one_stub (struct bfd_hash_entry *gen_entry, |
| 3243 | void * in_arg ATTRIBUTE_UNUSED) |
| 3244 | { |
| 3245 | struct elf32_csky_stub_hash_entry *stub_entry; |
| 3246 | const insn_sequence *template_sequence = NULL; |
| 3247 | int template_size = 0; |
| 3248 | int size = 0; |
| 3249 | |
| 3250 | /* Massage our args to the form they really have. */ |
| 3251 | stub_entry = (struct elf32_csky_stub_hash_entry *) gen_entry; |
| 3252 | |
| 3253 | BFD_ASSERT (stub_entry->stub_type > csky_stub_none |
| 3254 | && stub_entry->stub_type < ARRAY_SIZE (stub_definitions)); |
| 3255 | size = find_stub_size_and_template (stub_entry->stub_type, |
| 3256 | &template_sequence, &template_size); |
| 3257 | stub_entry->stub_size = size; |
| 3258 | stub_entry->stub_template = template_sequence; |
| 3259 | stub_entry->stub_template_size = template_size; |
| 3260 | |
| 3261 | size = (size + 7) & ~7; |
| 3262 | stub_entry->stub_sec->size += size; |
| 3263 | return TRUE; |
| 3264 | } |
| 3265 | |
| 3266 | /* Add a new stub entry to the stub hash. Not all fields of the new |
| 3267 | stub entry are initialised. */ |
| 3268 | |
| 3269 | static struct elf32_csky_stub_hash_entry * |
| 3270 | elf32_csky_add_stub (const char *stub_name, |
| 3271 | asection *section, |
| 3272 | struct csky_elf_link_hash_table *htab) |
| 3273 | { |
| 3274 | asection *link_sec; |
| 3275 | asection *stub_sec; |
| 3276 | struct elf32_csky_stub_hash_entry *stub_entry; |
| 3277 | |
| 3278 | stub_sec = elf32_csky_create_or_find_stub_sec (&link_sec, section, htab); |
| 3279 | if (stub_sec == NULL) |
| 3280 | return NULL; |
| 3281 | |
| 3282 | /* Enter this entry into the linker stub hash table. */ |
| 3283 | stub_entry = csky_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| 3284 | TRUE, FALSE); |
| 3285 | if (stub_entry == NULL) |
| 3286 | { |
| 3287 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), |
| 3288 | section->owner, stub_name); |
| 3289 | return NULL; |
| 3290 | } |
| 3291 | |
| 3292 | stub_entry->stub_sec = stub_sec; |
| 3293 | stub_entry->stub_offset = 0; |
| 3294 | stub_entry->id_sec = link_sec; |
| 3295 | |
| 3296 | return stub_entry; |
| 3297 | } |
| 3298 | |
| 3299 | /* Determine and set the size of the stub section for a final link. |
| 3300 | The basic idea here is to examine all the relocations looking for |
| 3301 | PC-relative calls to a target that is unreachable with a "bsr" |
| 3302 | instruction. */ |
| 3303 | |
| 3304 | bfd_boolean |
| 3305 | elf32_csky_size_stubs (bfd *output_bfd, |
| 3306 | bfd *stub_bfd, |
| 3307 | struct bfd_link_info *info, |
| 3308 | bfd_signed_vma group_size, |
| 3309 | asection *(*add_stub_section) (const char*, asection*), |
| 3310 | void (*layout_sections_again) (void)) |
| 3311 | { |
| 3312 | bfd_size_type stub_group_size; |
| 3313 | bfd_boolean stubs_always_after_branch; |
| 3314 | struct csky_elf_link_hash_table *htab = csky_elf_hash_table (info); |
| 3315 | |
| 3316 | if (htab == NULL) |
| 3317 | return FALSE; |
| 3318 | |
| 3319 | /* Propagate mach to stub bfd, because it may not have been |
| 3320 | finalized when we created stub_bfd. */ |
| 3321 | bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd), |
| 3322 | bfd_get_mach (output_bfd)); |
| 3323 | |
| 3324 | /* Stash our params away. */ |
| 3325 | htab->stub_bfd = stub_bfd; |
| 3326 | htab->add_stub_section = add_stub_section; |
| 3327 | htab->layout_sections_again = layout_sections_again; |
| 3328 | stubs_always_after_branch = group_size < 0; |
| 3329 | |
| 3330 | if (group_size < 0) |
| 3331 | stub_group_size = -group_size; |
| 3332 | else |
| 3333 | stub_group_size = group_size; |
| 3334 | |
| 3335 | if (stub_group_size == 1) |
| 3336 | /* The 'bsr' range in abiv2 is +-64MB has to be used as the |
| 3337 | default maximum size. |
| 3338 | This value is 128K less than that, which allows for 131072 |
| 3339 | byte stubs. If we exceed that, then we will fail to link. |
| 3340 | The user will have to relink with an explicit group size |
| 3341 | option. */ |
| 3342 | stub_group_size = 66977792; |
| 3343 | |
| 3344 | group_sections (htab, stub_group_size, stubs_always_after_branch); |
| 3345 | |
| 3346 | while (1) |
| 3347 | { |
| 3348 | bfd *input_bfd; |
| 3349 | unsigned int bfd_indx; |
| 3350 | asection *stub_sec; |
| 3351 | bfd_boolean stub_changed = FALSE; |
| 3352 | |
| 3353 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
| 3354 | input_bfd != NULL; |
| 3355 | input_bfd = input_bfd->link.next, bfd_indx++) |
| 3356 | { |
| 3357 | Elf_Internal_Shdr *symtab_hdr; |
| 3358 | asection *section; |
| 3359 | Elf_Internal_Sym *local_syms = NULL; |
| 3360 | |
| 3361 | /* We'll need the symbol table in a second. */ |
| 3362 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 3363 | if (symtab_hdr->sh_info == 0) |
| 3364 | continue; |
| 3365 | |
| 3366 | /* Walk over each section attached to the input bfd. */ |
| 3367 | for (section = input_bfd->sections; |
| 3368 | section != NULL; |
| 3369 | section = section->next) |
| 3370 | { |
| 3371 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| 3372 | |
| 3373 | /* If there aren't any relocs, then there's nothing more |
| 3374 | * to do. */ |
| 3375 | if ((section->flags & SEC_RELOC) == 0 |
| 3376 | || section->reloc_count == 0 |
| 3377 | || (section->flags & SEC_CODE) == 0) |
| 3378 | continue; |
| 3379 | |
| 3380 | /* If this section is a link-once section that will be |
| 3381 | discarded, then don't create any stubs. */ |
| 3382 | if (section->output_section == NULL |
| 3383 | || section->output_section->owner != output_bfd) |
| 3384 | continue; |
| 3385 | |
| 3386 | /* Get the relocs. */ |
| 3387 | internal_relocs = _bfd_elf_link_read_relocs (input_bfd, |
| 3388 | section, |
| 3389 | NULL, NULL, |
| 3390 | info->keep_memory); |
| 3391 | |
| 3392 | if (internal_relocs == NULL) |
| 3393 | goto error_ret_free_local; |
| 3394 | |
| 3395 | /* Now examine each relocation. */ |
| 3396 | irela = internal_relocs; |
| 3397 | irelaend = irela + section->reloc_count; |
| 3398 | for (; irela < irelaend; irela++) |
| 3399 | { |
| 3400 | unsigned int r_type, r_indx; |
| 3401 | enum elf32_csky_stub_type stub_type; |
| 3402 | struct elf32_csky_stub_hash_entry *stub_entry; |
| 3403 | asection *sym_sec; |
| 3404 | bfd_vma sym_value; |
| 3405 | bfd_vma destination; |
| 3406 | struct csky_elf_link_hash_entry *hash; |
| 3407 | const char *sym_name; |
| 3408 | char *stub_name; |
| 3409 | const asection *id_sec; |
| 3410 | unsigned char st_type; |
| 3411 | |
| 3412 | r_type = ELF32_R_TYPE (irela->r_info); |
| 3413 | r_indx = ELF32_R_SYM (irela->r_info); |
| 3414 | if (r_type >= (unsigned int) R_CKCORE_MAX) |
| 3415 | { |
| 3416 | bfd_set_error (bfd_error_bad_value); |
| 3417 | error_ret_free_internal: |
| 3418 | if (elf_section_data (section)->relocs == NULL) |
| 3419 | free (internal_relocs); |
| 3420 | goto error_ret_free_local; |
| 3421 | } |
| 3422 | |
| 3423 | /* Only look for stubs on branch instructions. */ |
| 3424 | if (r_type != (unsigned int) R_CKCORE_PCREL_IMM26BY2) |
| 3425 | continue; |
| 3426 | /* Now determine the call target, its name, value, |
| 3427 | section. */ |
| 3428 | sym_sec = NULL; |
| 3429 | sym_value = 0; |
| 3430 | destination = 0; |
| 3431 | hash = NULL; |
| 3432 | sym_name = NULL; |
| 3433 | if (r_indx < symtab_hdr->sh_info) |
| 3434 | { |
| 3435 | /* It's a local symbol. */ |
| 3436 | Elf_Internal_Sym *sym; |
| 3437 | Elf_Internal_Shdr *hdr; |
| 3438 | if (local_syms == NULL) |
| 3439 | local_syms = |
| 3440 | (Elf_Internal_Sym *) symtab_hdr->contents; |
| 3441 | if (local_syms == NULL) |
| 3442 | { |
| 3443 | local_syms = |
| 3444 | bfd_elf_get_elf_syms (input_bfd, |
| 3445 | symtab_hdr, |
| 3446 | symtab_hdr->sh_info, |
| 3447 | 0, NULL, NULL, NULL); |
| 3448 | if (local_syms == NULL) |
| 3449 | goto error_ret_free_internal; |
| 3450 | } |
| 3451 | sym = local_syms + r_indx; |
| 3452 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; |
| 3453 | sym_sec = hdr->bfd_section; |
| 3454 | if (!sym_sec) |
| 3455 | /* This is an undefined symbol. It can never |
| 3456 | be resolved. */ |
| 3457 | continue; |
| 3458 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| 3459 | sym_value = sym->st_value; |
| 3460 | destination = (sym_value + irela->r_addend |
| 3461 | + sym_sec->output_offset |
| 3462 | + sym_sec->output_section->vma); |
| 3463 | st_type = ELF_ST_TYPE (sym->st_info); |
| 3464 | sym_name = |
| 3465 | bfd_elf_string_from_elf_section (input_bfd, |
| 3466 | symtab_hdr->sh_link, |
| 3467 | sym->st_name); |
| 3468 | } |
| 3469 | else |
| 3470 | { |
| 3471 | /* It's an external symbol. */ |
| 3472 | int e_indx; |
| 3473 | e_indx = r_indx - symtab_hdr->sh_info; |
| 3474 | hash = ((struct csky_elf_link_hash_entry *) |
| 3475 | elf_sym_hashes (input_bfd)[e_indx]); |
| 3476 | |
| 3477 | while (hash->elf.root.type == bfd_link_hash_indirect |
| 3478 | || hash->elf.root.type == bfd_link_hash_warning) |
| 3479 | hash = ((struct csky_elf_link_hash_entry *) |
| 3480 | hash->elf.root.u.i.link); |
| 3481 | if (hash->elf.root.type == bfd_link_hash_defined |
| 3482 | || hash->elf.root.type == bfd_link_hash_defweak) |
| 3483 | { |
| 3484 | sym_sec = hash->elf.root.u.def.section; |
| 3485 | sym_value = hash->elf.root.u.def.value; |
| 3486 | |
| 3487 | struct csky_elf_link_hash_table *globals = |
| 3488 | csky_elf_hash_table (info); |
| 3489 | /* FIXME For a destination in a shared library. */ |
| 3490 | if (globals->elf.splt != NULL && hash != NULL |
| 3491 | && hash->elf.plt.offset != (bfd_vma) -1) |
| 3492 | continue; |
| 3493 | else if (sym_sec->output_section != NULL) |
| 3494 | destination = (sym_value + irela->r_addend |
| 3495 | + sym_sec->output_offset |
| 3496 | + sym_sec->output_section->vma); |
| 3497 | } |
| 3498 | else if (hash->elf.root.type == bfd_link_hash_undefined |
| 3499 | || (hash->elf.root.type |
| 3500 | == bfd_link_hash_undefweak)) |
| 3501 | /* FIXME For a destination in a shared library. */ |
| 3502 | continue; |
| 3503 | else |
| 3504 | { |
| 3505 | bfd_set_error (bfd_error_bad_value); |
| 3506 | goto error_ret_free_internal; |
| 3507 | } |
| 3508 | st_type = ELF_ST_TYPE (hash->elf.type); |
| 3509 | sym_name = hash->elf.root.root.string; |
| 3510 | } |
| 3511 | do |
| 3512 | { |
| 3513 | /* Determine what (if any) linker stub is needed. */ |
| 3514 | stub_type = csky_type_of_stub (info, section, irela, |
| 3515 | st_type, hash, |
| 3516 | destination, sym_sec, |
| 3517 | input_bfd, sym_name); |
| 3518 | if (stub_type == csky_stub_none) |
| 3519 | break; |
| 3520 | |
| 3521 | /* Support for grouping stub sections. */ |
| 3522 | id_sec = htab->stub_group[section->id].link_sec; |
| 3523 | |
| 3524 | /* Get the name of this stub. */ |
| 3525 | stub_name = elf32_csky_stub_name (id_sec, sym_sec, hash, |
| 3526 | irela); |
| 3527 | if (!stub_name) |
| 3528 | goto error_ret_free_internal; |
| 3529 | /* We've either created a stub for this reloc already, |
| 3530 | or we are about to. */ |
| 3531 | stub_entry |
| 3532 | = csky_stub_hash_lookup (&htab->stub_hash_table, |
| 3533 | stub_name, |
| 3534 | FALSE, FALSE); |
| 3535 | if (stub_entry != NULL) |
| 3536 | { |
| 3537 | /* The proper stub has already been created. */ |
| 3538 | free (stub_name); |
| 3539 | stub_entry->target_value = sym_value; |
| 3540 | break; |
| 3541 | } |
| 3542 | stub_entry = elf32_csky_add_stub (stub_name, section, |
| 3543 | htab); |
| 3544 | if (stub_entry == NULL) |
| 3545 | { |
| 3546 | free (stub_name); |
| 3547 | goto error_ret_free_internal; |
| 3548 | } |
| 3549 | stub_entry->target_value = sym_value; |
| 3550 | stub_entry->target_section = sym_sec; |
| 3551 | stub_entry->stub_type = stub_type; |
| 3552 | stub_entry->h = hash; |
| 3553 | stub_entry->st_type = st_type; |
| 3554 | |
| 3555 | if (sym_name == NULL) |
| 3556 | sym_name = "unnamed"; |
| 3557 | stub_entry->output_name = |
| 3558 | bfd_alloc (htab->stub_bfd, |
| 3559 | (sizeof (STUB_ENTRY_NAME) |
| 3560 | + strlen (sym_name))); |
| 3561 | if (stub_entry->output_name == NULL) |
| 3562 | { |
| 3563 | free (stub_name); |
| 3564 | goto error_ret_free_internal; |
| 3565 | } |
| 3566 | sprintf (stub_entry->output_name, STUB_ENTRY_NAME, |
| 3567 | sym_name); |
| 3568 | stub_changed = TRUE; |
| 3569 | } |
| 3570 | while (0); |
| 3571 | } |
| 3572 | /* We're done with the internal relocs, free them. */ |
| 3573 | if (elf_section_data (section)->relocs == NULL) |
| 3574 | free (internal_relocs); |
| 3575 | } |
| 3576 | } |
| 3577 | if (!stub_changed) |
| 3578 | break; |
| 3579 | /* OK, we've added some stubs. Find out the new size of the |
| 3580 | stub sections. */ |
| 3581 | for (stub_sec = htab->stub_bfd->sections; |
| 3582 | stub_sec != NULL; |
| 3583 | stub_sec = stub_sec->next) |
| 3584 | { |
| 3585 | /* Ignore non-stub sections. */ |
| 3586 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 3587 | continue; |
| 3588 | stub_sec->size = 0; |
| 3589 | } |
| 3590 | bfd_hash_traverse (&htab->stub_hash_table, csky_size_one_stub, htab); |
| 3591 | /* Ask the linker to do its stuff. */ |
| 3592 | (*htab->layout_sections_again) (); |
| 3593 | } |
| 3594 | |
| 3595 | return TRUE; |
| 3596 | error_ret_free_local: |
| 3597 | return FALSE; |
| 3598 | } |
| 3599 | |
| 3600 | static bfd_boolean |
| 3601 | csky_build_one_stub (struct bfd_hash_entry *gen_entry, |
| 3602 | void * in_arg) |
| 3603 | { |
| 3604 | #define MAXRELOCS 2 |
| 3605 | struct elf32_csky_stub_hash_entry *stub_entry; |
| 3606 | struct bfd_link_info *info; |
| 3607 | asection *stub_sec; |
| 3608 | bfd *stub_bfd; |
| 3609 | bfd_byte *loc; |
| 3610 | bfd_vma sym_value; |
| 3611 | int template_size; |
| 3612 | int size; |
| 3613 | const insn_sequence *template_sequence; |
| 3614 | int i; |
| 3615 | struct csky_elf_link_hash_table * globals; |
| 3616 | int stub_reloc_idx[MAXRELOCS] = {-1, -1}; |
| 3617 | int stub_reloc_offset[MAXRELOCS] = {0, 0}; |
| 3618 | int nrelocs = 0; |
| 3619 | struct elf_link_hash_entry *h = NULL; |
| 3620 | |
| 3621 | /* Massage our args to the form they really have. */ |
| 3622 | stub_entry = (struct elf32_csky_stub_hash_entry *)gen_entry; |
| 3623 | info = (struct bfd_link_info *) in_arg; |
| 3624 | |
| 3625 | globals = csky_elf_hash_table (info); |
| 3626 | if (globals == NULL) |
| 3627 | return FALSE; |
| 3628 | stub_sec = stub_entry->stub_sec; |
| 3629 | |
| 3630 | /* Make a note of the offset within the stubs for this entry. */ |
| 3631 | stub_entry->stub_offset = stub_sec->size; |
| 3632 | loc = stub_sec->contents + stub_entry->stub_offset; |
| 3633 | |
| 3634 | stub_bfd = stub_sec->owner; |
| 3635 | |
| 3636 | /* This is the address of the stub destination. */ |
| 3637 | h = &stub_entry->h->elf; |
| 3638 | if (sym_must_create_stub (h, info) |
| 3639 | && !(bfd_link_pic (info) |
| 3640 | && h->root.type == bfd_link_hash_defweak |
| 3641 | && h->def_regular |
| 3642 | && !h->def_dynamic)) |
| 3643 | sym_value = 0; |
| 3644 | else |
| 3645 | sym_value = (stub_entry->target_value |
| 3646 | + stub_entry->target_section->output_offset |
| 3647 | + stub_entry->target_section->output_section->vma); |
| 3648 | |
| 3649 | template_sequence = stub_entry->stub_template; |
| 3650 | template_size = stub_entry->stub_template_size; |
| 3651 | |
| 3652 | size = 0; |
| 3653 | for (i = 0; i < template_size; i++) |
| 3654 | switch (template_sequence[i].type) |
| 3655 | { |
| 3656 | case INSN16: |
| 3657 | bfd_put_16 (stub_bfd, (bfd_vma) template_sequence[i].data, |
| 3658 | loc + size); |
| 3659 | size += 2; |
| 3660 | break; |
| 3661 | case INSN32: |
| 3662 | csky_put_insn_32 (stub_bfd, (bfd_vma) template_sequence[i].data, |
| 3663 | loc + size); |
| 3664 | size += 4; |
| 3665 | break; |
| 3666 | case DATA_TYPE: |
| 3667 | bfd_put_32 (stub_bfd, (bfd_vma) template_sequence[i].data, |
| 3668 | loc + size); |
| 3669 | stub_reloc_idx[nrelocs] = i; |
| 3670 | stub_reloc_offset[nrelocs++] = size; |
| 3671 | size += 4; |
| 3672 | break; |
| 3673 | default: |
| 3674 | BFD_FAIL (); |
| 3675 | return FALSE; |
| 3676 | } |
| 3677 | stub_sec->size += size; |
| 3678 | |
| 3679 | /* Stub size has already been computed in csky_size_one_stub. Check |
| 3680 | consistency. */ |
| 3681 | BFD_ASSERT (size == stub_entry->stub_size); |
| 3682 | |
| 3683 | /* Assume there is at least one and at most MAXRELOCS entries to relocate |
| 3684 | in each stub. */ |
| 3685 | BFD_ASSERT (nrelocs != 0 && nrelocs <= MAXRELOCS); |
| 3686 | |
| 3687 | for (i = 0; i < nrelocs; i++) |
| 3688 | { |
| 3689 | if (sym_must_create_stub (h, info)) |
| 3690 | { |
| 3691 | Elf_Internal_Rela outrel; |
| 3692 | asection * sreloc = globals->elf.srelgot; |
| 3693 | |
| 3694 | outrel.r_offset = stub_entry->stub_offset + stub_reloc_offset[i]; |
| 3695 | outrel.r_info = |
| 3696 | ELF32_R_INFO (h->dynindx, |
| 3697 | template_sequence[stub_reloc_idx[i]].r_type); |
| 3698 | outrel.r_addend = template_sequence[stub_reloc_idx[i]].reloc_addend; |
| 3699 | |
| 3700 | loc = sreloc->contents; |
| 3701 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela); |
| 3702 | |
| 3703 | if (loc != NULL) |
| 3704 | bfd_elf32_swap_reloca_out (info->output_bfd, &outrel, loc); |
| 3705 | } |
| 3706 | _bfd_final_link_relocate (elf32_csky_howto_from_type |
| 3707 | (template_sequence[stub_reloc_idx[i]].r_type), |
| 3708 | stub_bfd, stub_sec, stub_sec->contents, |
| 3709 | stub_entry->stub_offset + stub_reloc_offset[i], |
| 3710 | sym_value + stub_entry->target_addend, |
| 3711 | template_sequence[stub_reloc_idx[i]].reloc_addend); |
| 3712 | } |
| 3713 | |
| 3714 | return TRUE; |
| 3715 | #undef MAXRELOCS |
| 3716 | } |
| 3717 | |
| 3718 | /* Build all the stubs associated with the current output file. The |
| 3719 | stubs are kept in a hash table attached to the main linker hash |
| 3720 | table. We also set up the .plt entries for statically linked PIC |
| 3721 | functions here. This function is called via arm_elf_finish in the |
| 3722 | linker. */ |
| 3723 | |
| 3724 | bfd_boolean |
| 3725 | elf32_csky_build_stubs (struct bfd_link_info *info) |
| 3726 | { |
| 3727 | asection *stub_sec; |
| 3728 | struct bfd_hash_table *table; |
| 3729 | struct csky_elf_link_hash_table *htab; |
| 3730 | |
| 3731 | htab = csky_elf_hash_table (info); |
| 3732 | |
| 3733 | if (htab == NULL) |
| 3734 | return FALSE; |
| 3735 | |
| 3736 | for (stub_sec = htab->stub_bfd->sections; |
| 3737 | stub_sec != NULL; |
| 3738 | stub_sec = stub_sec->next) |
| 3739 | { |
| 3740 | bfd_size_type size; |
| 3741 | |
| 3742 | /* Ignore non-stub sections. */ |
| 3743 | if (!strstr (stub_sec->name, STUB_SUFFIX)) |
| 3744 | continue; |
| 3745 | |
| 3746 | /* Allocate memory to hold the linker stubs. */ |
| 3747 | size = stub_sec->size; |
| 3748 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); |
| 3749 | if (stub_sec->contents == NULL && size != 0) |
| 3750 | return FALSE; |
| 3751 | stub_sec->size = 0; |
| 3752 | } |
| 3753 | |
| 3754 | /* Build the stubs as directed by the stub hash table. */ |
| 3755 | table = &htab->stub_hash_table; |
| 3756 | bfd_hash_traverse (table, csky_build_one_stub, info); |
| 3757 | |
| 3758 | return TRUE; |
| 3759 | } |
| 3760 | |
| 3761 | /* Set up various things so that we can make a list of input sections |
| 3762 | for each output section included in the link. Returns -1 on error, |
| 3763 | 0 when no stubs will be needed, and 1 on success. */ |
| 3764 | |
| 3765 | int |
| 3766 | elf32_csky_setup_section_lists (bfd *output_bfd, |
| 3767 | struct bfd_link_info *info) |
| 3768 | { |
| 3769 | bfd *input_bfd; |
| 3770 | unsigned int bfd_count; |
| 3771 | unsigned int top_id, top_index; |
| 3772 | asection *section; |
| 3773 | asection **input_list, **list; |
| 3774 | bfd_size_type amt; |
| 3775 | struct csky_elf_link_hash_table *htab = csky_elf_hash_table (info); |
| 3776 | |
| 3777 | if (!htab) |
| 3778 | return 0; |
| 3779 | if (! is_elf_hash_table (htab)) |
| 3780 | return 0; |
| 3781 | |
| 3782 | /* Count the number of input BFDs and find the top input section id. */ |
| 3783 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; |
| 3784 | input_bfd != NULL; |
| 3785 | input_bfd = input_bfd->link.next) |
| 3786 | { |
| 3787 | bfd_count += 1; |
| 3788 | for (section = input_bfd->sections; |
| 3789 | section != NULL; |
| 3790 | section = section->next) |
| 3791 | if (top_id < section->id) |
| 3792 | top_id = section->id; |
| 3793 | } |
| 3794 | htab->bfd_count = bfd_count; |
| 3795 | amt = sizeof (struct map_stub) * (top_id + 1); |
| 3796 | htab->stub_group = bfd_zmalloc (amt); |
| 3797 | if (htab->stub_group == NULL) |
| 3798 | return -1; |
| 3799 | |
| 3800 | /* We can't use output_bfd->section_count here to find the top output |
| 3801 | section index as some sections may have been removed, and |
| 3802 | _bfd_strip_section_from_output doesn't renumber the indices. */ |
| 3803 | for (section = output_bfd->sections, top_index = 0; |
| 3804 | section != NULL; |
| 3805 | section = section->next) |
| 3806 | if (top_index < section->index) |
| 3807 | top_index = section->index; |
| 3808 | htab->top_index = top_index; |
| 3809 | amt = sizeof (asection *) * (top_index + 1); |
| 3810 | input_list = bfd_malloc (amt); |
| 3811 | htab->input_list = input_list; |
| 3812 | if (input_list == NULL) |
| 3813 | return -1; |
| 3814 | /* For sections we aren't interested in, mark their entries with a |
| 3815 | value we can check later. */ |
| 3816 | list = input_list + top_index; |
| 3817 | do |
| 3818 | *list = bfd_abs_section_ptr; |
| 3819 | while (list-- != input_list); |
| 3820 | for (section = output_bfd->sections; |
| 3821 | section != NULL; |
| 3822 | section = section->next) |
| 3823 | if ((section->flags & SEC_CODE) != 0) |
| 3824 | input_list[section->index] = NULL; |
| 3825 | |
| 3826 | return 1; |
| 3827 | } |
| 3828 | |
| 3829 | static bfd_reloc_status_type |
| 3830 | csky_relocate_contents (reloc_howto_type *howto, |
| 3831 | bfd *input_bfd, |
| 3832 | long relocation, |
| 3833 | bfd_byte *location) |
| 3834 | { |
| 3835 | int size; |
| 3836 | bfd_vma x = 0; |
| 3837 | bfd_reloc_status_type flag; |
| 3838 | unsigned int rightshift = howto->rightshift; |
| 3839 | unsigned int bitpos = howto->bitpos; |
| 3840 | |
| 3841 | /* If the size is negative, negate RELOCATION. This isn't very |
| 3842 | general. */ |
| 3843 | if (howto->size < 0) |
| 3844 | relocation = -relocation; |
| 3845 | |
| 3846 | /* FIXME: these macros should be defined at file head or head file head. */ |
| 3847 | #define CSKY_INSN_ADDI_TO_SUBI 0x04000000 |
| 3848 | #define CSKY_INSN_MOV_RTB 0xc41d4820 // mov32 rx, r29, 0 |
| 3849 | #define CSKY_INSN_MOV_RDB 0xc41c4820 // mov32 rx, r28, 0 |
| 3850 | #define CSKY_INSN_GET_ADDI_RZ(x) (((x) & 0x03e00000) >> 21) |
| 3851 | #define CSKY_INSN_SET_MOV_RZ(x) ((x) & 0x0000001f) |
| 3852 | #define CSKY_INSN_JSRI_TO_LRW 0xea9a0000 |
| 3853 | #define CSKY_INSN_JSR_R26 0xe8fa0000 |
| 3854 | |
| 3855 | /* Get the value we are going to relocate. */ |
| 3856 | size = bfd_get_reloc_size (howto); |
| 3857 | switch (size) |
| 3858 | { |
| 3859 | default: |
| 3860 | case 0: |
| 3861 | abort (); |
| 3862 | case 1: |
| 3863 | x = bfd_get_8 (input_bfd, location); |
| 3864 | break; |
| 3865 | case 2: |
| 3866 | x = bfd_get_16 (input_bfd, location); |
| 3867 | break; |
| 3868 | case 4: |
| 3869 | if (need_reverse_bits) |
| 3870 | { |
| 3871 | x = csky_get_insn_32 (input_bfd, location); |
| 3872 | |
| 3873 | if (R_CKCORE_DOFFSET_LO16 == howto->type) |
| 3874 | { |
| 3875 | if ((signed) relocation < 0) |
| 3876 | { |
| 3877 | x |= CSKY_INSN_ADDI_TO_SUBI; |
| 3878 | relocation = -relocation; |
| 3879 | } |
| 3880 | else if (0 == relocation) |
| 3881 | x = (CSKY_INSN_MOV_RDB | |
| 3882 | CSKY_INSN_SET_MOV_RZ (CSKY_INSN_GET_ADDI_RZ (x))); |
| 3883 | } |
| 3884 | else if (R_CKCORE_TOFFSET_LO16 == howto->type) |
| 3885 | { |
| 3886 | if ((signed) relocation < 0) |
| 3887 | { |
| 3888 | x |= CSKY_INSN_ADDI_TO_SUBI; |
| 3889 | relocation = -relocation; |
| 3890 | } |
| 3891 | else if (0 == relocation) |
| 3892 | x = (CSKY_INSN_MOV_RTB | |
| 3893 | CSKY_INSN_SET_MOV_RZ (CSKY_INSN_GET_ADDI_RZ (x))); |
| 3894 | } |
| 3895 | } |
| 3896 | else |
| 3897 | x = bfd_get_32 (input_bfd, location); |
| 3898 | break; |
| 3899 | } |
| 3900 | /* Check for overflow. FIXME: We may drop bits during the addition |
| 3901 | which we don't check for. We must either check at every single |
| 3902 | operation, which would be tedious, or we must do the computations |
| 3903 | in a type larger than bfd_vma, which would be inefficient. */ |
| 3904 | flag = bfd_reloc_ok; |
| 3905 | if (howto->complain_on_overflow != complain_overflow_dont) |
| 3906 | { |
| 3907 | int addrmask; |
| 3908 | int fieldmask; |
| 3909 | int signmask; |
| 3910 | int ss; |
| 3911 | int a; |
| 3912 | int b; |
| 3913 | int sum; |
| 3914 | /* Get the values to be added together. For signed and unsigned |
| 3915 | relocations, we assume that all values should be truncated to |
| 3916 | the size of an address. For bitfields, all the bits matter. |
| 3917 | See also bfd_check_overflow. */ |
| 3918 | #define N_ONES(n) (((((bfd_vma) 1 << ((n) - 1)) - 1) << 1) | 1) |
| 3919 | fieldmask = N_ONES (howto->bitsize); |
| 3920 | signmask = ~fieldmask; |
| 3921 | addrmask = N_ONES (bfd_arch_bits_per_address (input_bfd)) | fieldmask; |
| 3922 | a = (relocation & addrmask) >> rightshift; |
| 3923 | if (read_content_substitute) |
| 3924 | x = read_content_substitute; |
| 3925 | b = (x & howto->src_mask & addrmask) >> bitpos; |
| 3926 | |
| 3927 | switch (howto->complain_on_overflow) |
| 3928 | { |
| 3929 | case complain_overflow_signed: |
| 3930 | /* If any sign bits are set, all sign bits must be set. |
| 3931 | That is, A must be a valid negative address after |
| 3932 | shifting. */ |
| 3933 | signmask = ~(fieldmask >> 1); |
| 3934 | /* Fall through. */ |
| 3935 | |
| 3936 | case complain_overflow_bitfield: |
| 3937 | /* Much like the signed check, but for a field one bit |
| 3938 | wider. We allow a bitfield to represent numbers in the |
| 3939 | range -2**n to 2**n-1, where n is the number of bits in the |
| 3940 | field. Note that when bfd_vma is 32 bits, a 32-bit reloc |
| 3941 | can't overflow, which is exactly what we want. */ |
| 3942 | ss = a & signmask; |
| 3943 | if (ss != 0 && ss != ((addrmask >> rightshift) & signmask)) |
| 3944 | flag = bfd_reloc_overflow; |
| 3945 | /* We only need this next bit of code if the sign bit of B |
| 3946 | is below the sign bit of A. This would only happen if |
| 3947 | SRC_MASK had fewer bits than BITSIZE. Note that if |
| 3948 | SRC_MASK has more bits than BITSIZE, we can get into |
| 3949 | trouble; we would need to verify that B is in range, as |
| 3950 | we do for A above. */ |
| 3951 | ss = ((~howto->src_mask) >> 1) & howto->src_mask; |
| 3952 | ss >>= bitpos; |
| 3953 | |
| 3954 | /* Set all the bits above the sign bit. */ |
| 3955 | b = (b ^ ss) - ss; |
| 3956 | |
| 3957 | /* Now we can do the addition. */ |
| 3958 | sum = a + b; |
| 3959 | |
| 3960 | /* See if the result has the correct sign. Bits above the |
| 3961 | sign bit are junk now; ignore them. If the sum is |
| 3962 | positive, make sure we did not have all negative inputs; |
| 3963 | if the sum is negative, make sure we did not have all |
| 3964 | positive inputs. The test below looks only at the sign |
| 3965 | bits, and it really just |
| 3966 | SIGN (A) == SIGN (B) && SIGN (A) != SIGN (SUM) |
| 3967 | |
| 3968 | We mask with addrmask here to explicitly allow an address |
| 3969 | wrap-around. The Linux kernel relies on it, and it is |
| 3970 | the only way to write assembler code which can run when |
| 3971 | loaded at a location 0x80000000 away from the location at |
| 3972 | which it is linked. */ |
| 3973 | |
| 3974 | if (((~(a ^ b)) & (a ^ sum)) & signmask & addrmask) |
| 3975 | flag = bfd_reloc_overflow; |
| 3976 | break; |
| 3977 | case complain_overflow_unsigned: |
| 3978 | /* Checking for an unsigned overflow is relatively easy: |
| 3979 | trim the addresses and add, and trim the result as well. |
| 3980 | Overflow is normally indicated when the result does not |
| 3981 | fit in the field. However, we also need to consider the |
| 3982 | case when, e.g., fieldmask is 0x7fffffff or smaller, an |
| 3983 | input is 0x80000000, and bfd_vma is only 32 bits; then we |
| 3984 | will get sum == 0, but there is an overflow, since the |
| 3985 | inputs did not fit in the field. Instead of doing a |
| 3986 | separate test, we can check for this by or-ing in the |
| 3987 | operands when testing for the sum overflowing its final |
| 3988 | field. */ |
| 3989 | sum = (a + b) & addrmask; |
| 3990 | if ((a | b | sum) & signmask) |
| 3991 | flag = bfd_reloc_overflow; |
| 3992 | break; |
| 3993 | default: |
| 3994 | abort (); |
| 3995 | } |
| 3996 | |
| 3997 | } |
| 3998 | /* Put RELOCATION in the right bits. */ |
| 3999 | relocation >>= (bfd_vma) rightshift; |
| 4000 | |
| 4001 | if ((howto->type == R_CKCORE_DOFFSET_LO16 |
| 4002 | || howto->type == R_CKCORE_TOFFSET_LO16) |
| 4003 | && relocation == 0) |
| 4004 | /* Do nothing lsli32 rx, rz, 0. */ |
| 4005 | ; |
| 4006 | else |
| 4007 | { |
| 4008 | /* Fir V1, all this relocation must be x -1. */ |
| 4009 | if (howto->type == R_CKCORE_PCREL_IMM11BY2 |
| 4010 | || howto->type == R_CKCORE_PCREL_JSR_IMM11BY2 |
| 4011 | || howto->type == R_CKCORE_DOFFSET_LO16 |
| 4012 | || howto->type == R_CKCORE_TOFFSET_LO16) |
| 4013 | relocation -= 1; |
| 4014 | else if (howto->type == R_CKCORE_PCREL_IMM7BY4) |
| 4015 | relocation = (relocation & 0x1f) + ((relocation << 3) & 0x300); |
| 4016 | else if (howto->type == R_CKCORE_PCREL_FLRW_IMM8BY4) |
| 4017 | relocation |
| 4018 | = ((relocation << 4) & 0xf0) + ((relocation << 17) & 0x1e00000); |
| 4019 | else if (howto->type == R_CKCORE_NOJSRI) |
| 4020 | { |
| 4021 | x = (x & howto->dst_mask) | CSKY_INSN_JSRI_TO_LRW; |
| 4022 | relocation = 0; |
| 4023 | csky_put_insn_32 (input_bfd, CSKY_INSN_JSR_R26, location + 4); |
| 4024 | } |
| 4025 | |
| 4026 | relocation <<= (bfd_vma) bitpos; |
| 4027 | /* Add RELOCATION to the right bits of X. */ |
| 4028 | x = ((x & ~howto->dst_mask) |
| 4029 | | (((x & howto->src_mask) + relocation) & howto->dst_mask)); |
| 4030 | } |
| 4031 | /* Put the relocated value back in the object file. */ |
| 4032 | switch (size) |
| 4033 | { |
| 4034 | default: |
| 4035 | abort (); |
| 4036 | case 1: |
| 4037 | bfd_put_8 (input_bfd, x, location); |
| 4038 | break; |
| 4039 | case 2: |
| 4040 | bfd_put_16 (input_bfd, x, location); |
| 4041 | break; |
| 4042 | case 4: |
| 4043 | if (need_reverse_bits) |
| 4044 | csky_put_insn_32 (input_bfd, x, location); |
| 4045 | else |
| 4046 | bfd_put_32 (input_bfd, x, location); |
| 4047 | break; |
| 4048 | } |
| 4049 | return flag; |
| 4050 | } |
| 4051 | |
| 4052 | /* Look up an entry in the stub hash. Stub entries are cached because |
| 4053 | creating the stub name takes a bit of time. */ |
| 4054 | |
| 4055 | static struct elf32_csky_stub_hash_entry * |
| 4056 | elf32_csky_get_stub_entry (const asection *input_section, |
| 4057 | const asection *sym_sec, |
| 4058 | struct elf_link_hash_entry *hash, |
| 4059 | const Elf_Internal_Rela *rel, |
| 4060 | struct csky_elf_link_hash_table *htab) |
| 4061 | { |
| 4062 | struct elf32_csky_stub_hash_entry *stub_entry; |
| 4063 | struct csky_elf_link_hash_entry *h |
| 4064 | = (struct csky_elf_link_hash_entry *) hash; |
| 4065 | const asection *id_sec; |
| 4066 | |
| 4067 | if ((input_section->flags & SEC_CODE) == 0) |
| 4068 | return NULL; |
| 4069 | |
| 4070 | /* If this input section is part of a group of sections sharing one |
| 4071 | stub section, then use the id of the first section in the group. |
| 4072 | Stub names need to include a section id, as there may well be |
| 4073 | more than one stub used to reach say, printf, and we need to |
| 4074 | distinguish between them. */ |
| 4075 | id_sec = htab->stub_group[input_section->id].link_sec; |
| 4076 | if (h != NULL && h->stub_cache != NULL |
| 4077 | && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec) |
| 4078 | stub_entry = h->stub_cache; |
| 4079 | else |
| 4080 | { |
| 4081 | char *stub_name; |
| 4082 | stub_name = elf32_csky_stub_name (id_sec, sym_sec, h, rel); |
| 4083 | if (stub_name == NULL) |
| 4084 | return NULL; |
| 4085 | stub_entry = csky_stub_hash_lookup (&htab->stub_hash_table, |
| 4086 | stub_name, FALSE, FALSE); |
| 4087 | if (h != NULL) |
| 4088 | h->stub_cache = stub_entry; |
| 4089 | free (stub_name); |
| 4090 | } |
| 4091 | |
| 4092 | return stub_entry; |
| 4093 | } |
| 4094 | |
| 4095 | static bfd_reloc_status_type |
| 4096 | csky_final_link_relocate (reloc_howto_type *howto, |
| 4097 | bfd *input_bfd, |
| 4098 | asection *input_section, |
| 4099 | bfd_byte *contents, |
| 4100 | bfd_vma address, |
| 4101 | bfd_vma value, |
| 4102 | bfd_vma addend) |
| 4103 | { |
| 4104 | bfd_vma relocation; |
| 4105 | |
| 4106 | /* Sanity check the address. */ |
| 4107 | if (address > bfd_get_section_limit (input_bfd, input_section)) |
| 4108 | return bfd_reloc_outofrange; |
| 4109 | |
| 4110 | /* This function assumes that we are dealing with a basic relocation |
| 4111 | against a symbol. We want to compute the value of the symbol to |
| 4112 | relocate to. This is just VALUE, the value of the symbol, |
| 4113 | plus ADDEND, any addend associated with the reloc. */ |
| 4114 | relocation = value + addend; |
| 4115 | |
| 4116 | /* If the relocation is PC relative, we want to set RELOCATION to |
| 4117 | the distance between the symbol (currently in RELOCATION) and the |
| 4118 | location we are relocating. Some targets (e.g., i386-aout) |
| 4119 | arrange for the contents of the section to be the negative of the |
| 4120 | offset of the location within the section; for such targets |
| 4121 | pcrel_offset is FALSE. Other targets (e.g., m88kbcs or ELF) |
| 4122 | simply leave the contents of the section as zero; for such |
| 4123 | targets pcrel_offset is TRUE. If pcrel_offset is FALSE we do not |
| 4124 | need to subtract out the offset of the location within the |
| 4125 | section (which is just ADDRESS). */ |
| 4126 | if (howto->pc_relative) |
| 4127 | { |
| 4128 | relocation -= (input_section->output_section->vma |
| 4129 | + input_section->output_offset); |
| 4130 | if (howto->pcrel_offset) |
| 4131 | relocation -= address; |
| 4132 | } |
| 4133 | |
| 4134 | return csky_relocate_contents (howto, input_bfd, relocation, |
| 4135 | contents + address); |
| 4136 | |
| 4137 | } |
| 4138 | |
| 4139 | /* Return the base VMA address which should be subtracted from real addresses |
| 4140 | when resolving @dtpoff relocation. |
| 4141 | This is PT_TLS segment p_vaddr. */ |
| 4142 | |
| 4143 | static bfd_vma |
| 4144 | dtpoff_base (struct bfd_link_info *info) |
| 4145 | { |
| 4146 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 4147 | if (elf_hash_table (info)->tls_sec == NULL) |
| 4148 | return 0; |
| 4149 | return elf_hash_table (info)->tls_sec->vma; |
| 4150 | } |
| 4151 | |
| 4152 | /* Return the relocation value for @tpoff relocation |
| 4153 | if STT_TLS virtual address is ADDRESS. */ |
| 4154 | |
| 4155 | static bfd_vma |
| 4156 | tpoff (struct bfd_link_info *info, bfd_vma address) |
| 4157 | { |
| 4158 | struct elf_link_hash_table *htab = elf_hash_table (info); |
| 4159 | bfd_vma base; |
| 4160 | |
| 4161 | /* If tls_sec is NULL, we should have signalled an error already. */ |
| 4162 | if (htab->tls_sec == NULL) |
| 4163 | return 0; |
| 4164 | base = align_power ((bfd_vma) TCB_SIZE, htab->tls_sec->alignment_power); |
| 4165 | return address - htab->tls_sec->vma + base; |
| 4166 | } |
| 4167 | |
| 4168 | /* Relocate a csky section. */ |
| 4169 | |
| 4170 | static bfd_boolean |
| 4171 | csky_elf_relocate_section (bfd * output_bfd, |
| 4172 | struct bfd_link_info * info, |
| 4173 | bfd * input_bfd, |
| 4174 | asection * input_section, |
| 4175 | bfd_byte * contents, |
| 4176 | Elf_Internal_Rela * relocs, |
| 4177 | Elf_Internal_Sym * local_syms, |
| 4178 | asection ** local_sections) |
| 4179 | { |
| 4180 | Elf_Internal_Shdr *symtab_hdr; |
| 4181 | struct elf_link_hash_entry **sym_hashes; |
| 4182 | Elf_Internal_Rela *rel; |
| 4183 | Elf_Internal_Rela *relend; |
| 4184 | const char *name; |
| 4185 | bfd_boolean ret = TRUE; |
| 4186 | struct csky_elf_link_hash_table * htab; |
| 4187 | bfd_vma *local_got_offsets = elf_local_got_offsets (input_bfd); |
| 4188 | |
| 4189 | htab = csky_elf_hash_table (info); |
| 4190 | if (htab == NULL) |
| 4191 | return FALSE; |
| 4192 | |
| 4193 | symtab_hdr = & elf_symtab_hdr (input_bfd); |
| 4194 | sym_hashes = elf_sym_hashes (input_bfd); |
| 4195 | |
| 4196 | rel = relocs; |
| 4197 | relend = relocs + input_section->reloc_count; |
| 4198 | for (; rel < relend; rel++) |
| 4199 | { |
| 4200 | enum elf_csky_reloc_type r_type |
| 4201 | = (enum elf_csky_reloc_type) ELF32_R_TYPE (rel->r_info); |
| 4202 | unsigned long r_symndx; |
| 4203 | reloc_howto_type * howto; |
| 4204 | Elf_Internal_Sym * sym; |
| 4205 | asection * sec; |
| 4206 | bfd_vma relocation; |
| 4207 | bfd_vma off; |
| 4208 | struct elf_link_hash_entry * h; |
| 4209 | bfd_vma addend = (bfd_vma)rel->r_addend; |
| 4210 | bfd_reloc_status_type r = bfd_reloc_ok; |
| 4211 | bfd_boolean unresolved_reloc = FALSE; |
| 4212 | int do_final_relocate = TRUE; |
| 4213 | bfd_boolean relative_reloc = FALSE; |
| 4214 | bfd_signed_vma disp; |
| 4215 | |
| 4216 | /* Ignore these relocation types: |
| 4217 | R_CKCORE_GNU_VTINHERIT, R_CKCORE_GNU_VTENTRY. */ |
| 4218 | if (r_type == R_CKCORE_GNU_VTINHERIT || r_type == R_CKCORE_GNU_VTENTRY) |
| 4219 | continue; |
| 4220 | |
| 4221 | if ((unsigned) r_type >= (unsigned) R_CKCORE_MAX) |
| 4222 | { |
| 4223 | /* The r_type is error, not support it. */ |
| 4224 | /* xgettext:c-format */ |
| 4225 | _bfd_error_handler (_("%pB: unsupported relocation type: %#x"), |
| 4226 | input_bfd, r_type); |
| 4227 | bfd_set_error (bfd_error_bad_value); |
| 4228 | ret = FALSE; |
| 4229 | continue; |
| 4230 | } |
| 4231 | |
| 4232 | howto = &csky_elf_howto_table[(int) r_type]; |
| 4233 | |
| 4234 | r_symndx = ELF32_R_SYM(rel->r_info); |
| 4235 | h = NULL; |
| 4236 | sym = NULL; |
| 4237 | sec = NULL; |
| 4238 | unresolved_reloc = FALSE; |
| 4239 | |
| 4240 | if (r_symndx < symtab_hdr->sh_info) |
| 4241 | { |
| 4242 | /* Get symbol table entry. */ |
| 4243 | sym = local_syms + r_symndx; |
| 4244 | sec = local_sections[r_symndx]; |
| 4245 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 4246 | addend = (bfd_vma)rel->r_addend; |
| 4247 | } |
| 4248 | else |
| 4249 | { |
| 4250 | bfd_boolean warned, ignored; |
| 4251 | |
| 4252 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 4253 | r_symndx, symtab_hdr, sym_hashes, |
| 4254 | h, sec, relocation, |
| 4255 | unresolved_reloc, warned, ignored); |
| 4256 | } |
| 4257 | |
| 4258 | if (sec != NULL && discarded_section (sec)) |
| 4259 | { |
| 4260 | /* For relocs against symbols from removed linkonce sections, |
| 4261 | or sections discarded by a linker script, we just want the |
| 4262 | section contents zeroed. Avoid any special processing. |
| 4263 | And if the symbol is referenced in '.csky_stack_size' section, |
| 4264 | set the address to SEC_DISCARDED(0xffffffff). */ |
| 4265 | #if 0 |
| 4266 | /* The .csky_stack_size section is just for callgraph. */ |
| 4267 | if (strcmp (input_section->name, ".csky_stack_size") == 0) |
| 4268 | { |
| 4269 | /* FIXME: it should define in head file. */ |
| 4270 | #define SEC_DISCARDED 0xffffffff |
| 4271 | bfd_put_32 (input_bfd, SEC_DISCARDED, contents + rel->r_offset); |
| 4272 | rel->r_info = 0; |
| 4273 | rel->r_addend = 0; |
| 4274 | continue; |
| 4275 | } |
| 4276 | else |
| 4277 | #endif |
| 4278 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 4279 | rel, 1, relend, howto, 0, |
| 4280 | contents); |
| 4281 | } |
| 4282 | |
| 4283 | if (bfd_link_relocatable (info)) |
| 4284 | continue; |
| 4285 | |
| 4286 | read_content_substitute = 0; |
| 4287 | |
| 4288 | /* Final link. */ |
| 4289 | disp = (relocation |
| 4290 | + (bfd_signed_vma) addend |
| 4291 | - input_section->output_section->vma |
| 4292 | - input_section->output_offset |
| 4293 | - rel->r_offset); |
| 4294 | /* It is for ck8xx. */ |
| 4295 | #define CSKY_INSN_BSR32 0xe0000000 |
| 4296 | /* It is for ck5xx/ck6xx. */ |
| 4297 | #define CSKY_INSN_BSR16 0xf800 |
| 4298 | #define within_range(x, L) (-(1 << (L - 1)) < (x) && (x) < (1 << (L -1)) - 2) |
| 4299 | switch (howto->type) |
| 4300 | { |
| 4301 | case R_CKCORE_PCREL_IMM18BY2: |
| 4302 | /* When h is NULL, means the instruction written as |
| 4303 | grs rx, imm32 |
| 4304 | if the highest bit is set, prevent the high 32bits |
| 4305 | turn to 0xffffffff when signed extern in 64bit |
| 4306 | host machine. */ |
| 4307 | if (h == NULL && (addend & 0x80000000)) |
| 4308 | addend &= 0xffffffff; |
| 4309 | break; |
| 4310 | |
| 4311 | case R_CKCORE_PCREL32: |
| 4312 | break; |
| 4313 | |
| 4314 | case R_CKCORE_GOT12: |
| 4315 | case R_CKCORE_PLT12: |
| 4316 | case R_CKCORE_GOT_HI16: |
| 4317 | case R_CKCORE_GOT_LO16: |
| 4318 | case R_CKCORE_PLT_HI16: |
| 4319 | case R_CKCORE_PLT_LO16: |
| 4320 | case R_CKCORE_GOT32: |
| 4321 | case R_CKCORE_GOT_IMM18BY4: |
| 4322 | /* Relocation is to the entry for this symbol in the global |
| 4323 | offset table. */ |
| 4324 | BFD_ASSERT (htab->elf.sgot != NULL); |
| 4325 | if (h != NULL) |
| 4326 | { |
| 4327 | /* Global symbol is defined by other modules. */ |
| 4328 | bfd_boolean dyn; |
| 4329 | off = h->got.offset; |
| 4330 | dyn = htab->elf.dynamic_sections_created; |
| 4331 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| 4332 | bfd_link_pic (info), h) |
| 4333 | || (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info,h)) |
| 4334 | || (ELF_ST_VISIBILITY(h->other) |
| 4335 | && h->root.type == bfd_link_hash_undefweak)) |
| 4336 | { |
| 4337 | /* This is actually a static link, or it is a |
| 4338 | -Bsymbolic link and the symbol is defined |
| 4339 | locally, or the symbol was forced to be local |
| 4340 | because of a version file. We must initialize |
| 4341 | this entry in the global offset table. Since the |
| 4342 | offset must always be a multiple of 4, we use the |
| 4343 | least significant bit to record whether we have |
| 4344 | initialized it already. |
| 4345 | When doing a dynamic link, we create a .rela.dyn |
| 4346 | relocation entry to initialize the value. This |
| 4347 | is done in the finish_dynamic_symbol routine. FIXME */ |
| 4348 | if (off & 1) |
| 4349 | off &= ~1; |
| 4350 | else |
| 4351 | { |
| 4352 | bfd_put_32 (output_bfd, relocation, |
| 4353 | htab->elf.sgot->contents + off); |
| 4354 | h->got.offset |= 1; |
| 4355 | |
| 4356 | /* TRUE if relative relocation should be generated. GOT reference to |
| 4357 | global symbol in PIC will lead to dynamic symbol. It becomes a |
| 4358 | problem when "time" or "times" is defined as a variable in an |
| 4359 | executable, clashing with functions of the same name in libc. If a |
| 4360 | symbol isn't undefined weak symbol, don't make it dynamic in PIC and |
| 4361 | generate relative relocation. */ |
| 4362 | #define GENERATE_RELATIVE_RELOC_P(INFO, H) \ |
| 4363 | ((H)->dynindx == -1 \ |
| 4364 | && !(H)->forced_local \ |
| 4365 | && (H)->root.type != bfd_link_hash_undefweak \ |
| 4366 | && bfd_link_pic (INFO)) |
| 4367 | |
| 4368 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
| 4369 | /* If this symbol isn't dynamic |
| 4370 | in PIC, generate R_CKCORE_RELATIVE here. */ |
| 4371 | relative_reloc = TRUE; |
| 4372 | } |
| 4373 | } |
| 4374 | else |
| 4375 | unresolved_reloc = FALSE; |
| 4376 | } /* End if h != NULL. */ |
| 4377 | else |
| 4378 | { |
| 4379 | BFD_ASSERT (local_got_offsets != NULL); |
| 4380 | off = local_got_offsets[r_symndx]; |
| 4381 | |
| 4382 | /* The offset must always be a multiple of 4. We use |
| 4383 | the least significant bit to record whether we have |
| 4384 | already generated the necessary reloc. */ |
| 4385 | if (off & 1) |
| 4386 | off &= ~1; |
| 4387 | else |
| 4388 | { |
| 4389 | bfd_put_32 (output_bfd, relocation, |
| 4390 | htab->elf.sgot->contents + off); |
| 4391 | local_got_offsets[r_symndx] |= 1; |
| 4392 | if (bfd_link_pic (info)) |
| 4393 | relative_reloc = TRUE; |
| 4394 | } |
| 4395 | } |
| 4396 | if (relative_reloc) |
| 4397 | { |
| 4398 | asection *srelgot; |
| 4399 | Elf_Internal_Rela outrel; |
| 4400 | bfd_byte *loc; |
| 4401 | |
| 4402 | srelgot = htab->elf.srelgot; |
| 4403 | BFD_ASSERT (srelgot != NULL); |
| 4404 | |
| 4405 | outrel.r_offset |
| 4406 | = (htab->elf.sgot->output_section->vma |
| 4407 | + htab->elf.sgot->output_offset + off); |
| 4408 | outrel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE); |
| 4409 | outrel.r_addend = relocation; |
| 4410 | loc = srelgot->contents; |
| 4411 | loc += (srelgot->reloc_count++ * sizeof (Elf32_External_Rela)); |
| 4412 | if (loc != NULL) |
| 4413 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 4414 | } |
| 4415 | relocation = htab->elf.sgot->output_offset + off; |
| 4416 | break; |
| 4417 | |
| 4418 | case R_CKCORE_GOTOFF_IMM18: |
| 4419 | case R_CKCORE_GOTOFF: |
| 4420 | case R_CKCORE_GOTOFF_HI16: |
| 4421 | case R_CKCORE_GOTOFF_LO16: |
| 4422 | /* Relocation is relative to the start of the global offset |
| 4423 | table. */ |
| 4424 | /* Note that sgot->output_offset is not involved in this |
| 4425 | calculation. We always want the start of .got. If we |
| 4426 | defined _GLOBAL_OFFSET_TABLE in a different way, as is |
| 4427 | permitted by the ABI, we might have to change this |
| 4428 | calculation. */ |
| 4429 | relocation -= htab->elf.sgot->output_section->vma; |
| 4430 | break; |
| 4431 | |
| 4432 | case R_CKCORE_GOTPC: |
| 4433 | case R_CKCORE_GOTPC_HI16: |
| 4434 | case R_CKCORE_GOTPC_LO16: |
| 4435 | /* Use global offset table as symbol value. */ |
| 4436 | relocation = htab->elf.sgot->output_section->vma; |
| 4437 | addend = -addend; |
| 4438 | unresolved_reloc = FALSE; |
| 4439 | break; |
| 4440 | |
| 4441 | case R_CKCORE_DOFFSET_IMM18: |
| 4442 | case R_CKCORE_DOFFSET_IMM18BY2: |
| 4443 | case R_CKCORE_DOFFSET_IMM18BY4: |
| 4444 | { |
| 4445 | asection *sdata = bfd_get_section_by_name (output_bfd, ".data"); |
| 4446 | relocation -= sdata->output_section->vma; |
| 4447 | } |
| 4448 | break; |
| 4449 | |
| 4450 | case R_CKCORE_DOFFSET_LO16: |
| 4451 | { |
| 4452 | asection *sdata = bfd_get_section_by_name (output_bfd, ".data"); |
| 4453 | relocation -= sdata->output_section->vma; |
| 4454 | } |
| 4455 | break; |
| 4456 | |
| 4457 | case R_CKCORE_TOFFSET_LO16: |
| 4458 | { |
| 4459 | asection *stext = bfd_get_section_by_name (output_bfd, ".text"); |
| 4460 | if (stext) |
| 4461 | relocation -= stext->output_section->vma; |
| 4462 | } |
| 4463 | break; |
| 4464 | |
| 4465 | case R_CKCORE_PLT_IMM18BY4: |
| 4466 | case R_CKCORE_PLT32: |
| 4467 | /* Relocation is to the entry for this symbol in the |
| 4468 | procedure linkage table. */ |
| 4469 | |
| 4470 | /* Resolve a PLT32 reloc against a local symbol directly, |
| 4471 | without using the procedure linkage table. */ |
| 4472 | if (h == NULL) |
| 4473 | break; |
| 4474 | |
| 4475 | if (h->plt.offset == (bfd_vma) -1 || htab->elf.splt == NULL) |
| 4476 | { |
| 4477 | /* We didn't make a PLT entry for this symbol. This |
| 4478 | happens when statically linking PIC code, or when |
| 4479 | using -Bsymbolic. */ |
| 4480 | if (h->got.offset != (bfd_vma) -1) |
| 4481 | { |
| 4482 | bfd_boolean dyn; |
| 4483 | |
| 4484 | off = h->got.offset; |
| 4485 | dyn = htab->elf.dynamic_sections_created; |
| 4486 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| 4487 | bfd_link_pic (info), h) |
| 4488 | || (bfd_link_pic (info) |
| 4489 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
| 4490 | || (ELF_ST_VISIBILITY (h->other) |
| 4491 | && h->root.type == bfd_link_hash_undefweak)) |
| 4492 | { |
| 4493 | /* This is actually a static link, or it is a |
| 4494 | -Bsymbolic link and the symbol is defined |
| 4495 | locally, or the symbol was forced to be local |
| 4496 | because of a version file. We must initialize |
| 4497 | this entry in the global offset table. Since the |
| 4498 | offset must always be a multiple of 4, we use the |
| 4499 | least significant bit to record whether we have |
| 4500 | initialized it already. |
| 4501 | |
| 4502 | When doing a dynamic link, we create a .rela.dyn |
| 4503 | relocation entry to initialize the value. This |
| 4504 | is done in the finish_dynamic_symbol routine. |
| 4505 | FIXME! */ |
| 4506 | if (off & 1) |
| 4507 | off &= ~1; |
| 4508 | else |
| 4509 | { |
| 4510 | h->got.offset |= 1; |
| 4511 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
| 4512 | relative_reloc = TRUE; |
| 4513 | } |
| 4514 | } |
| 4515 | bfd_put_32 (output_bfd, relocation, |
| 4516 | htab->elf.sgot->contents + off); |
| 4517 | |
| 4518 | if (relative_reloc) |
| 4519 | { |
| 4520 | asection *srelgot; |
| 4521 | Elf_Internal_Rela outrel; |
| 4522 | bfd_byte *loc; |
| 4523 | |
| 4524 | srelgot = htab->elf.srelgot; |
| 4525 | BFD_ASSERT (srelgot != NULL); |
| 4526 | |
| 4527 | outrel.r_offset |
| 4528 | = (htab->elf.sgot->output_section->vma |
| 4529 | + htab->elf.sgot->output_offset + off); |
| 4530 | outrel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE); |
| 4531 | outrel.r_addend = relocation; |
| 4532 | loc = srelgot->contents; |
| 4533 | loc += (srelgot->reloc_count++ |
| 4534 | * sizeof (Elf32_External_Rela)); |
| 4535 | if (loc != NULL) |
| 4536 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 4537 | } |
| 4538 | relocation = off + htab->elf.sgot->output_offset; |
| 4539 | } |
| 4540 | break; |
| 4541 | } |
| 4542 | /* The relocation is the got offset. */ |
| 4543 | if (bfd_csky_abi (output_bfd) == CSKY_ABI_V2) |
| 4544 | relocation = (h->plt.offset / PLT_ENTRY_SIZE + 2) * 4; |
| 4545 | else |
| 4546 | relocation = (h->plt.offset / PLT_ENTRY_SIZE_P + 2) * 4; |
| 4547 | unresolved_reloc = FALSE; |
| 4548 | break; |
| 4549 | |
| 4550 | case R_CKCORE_PCREL_IMM26BY2: |
| 4551 | case R_CKCORE_PCREL_JSR_IMM26BY2: |
| 4552 | case R_CKCORE_PCREL_JSR_IMM11BY2: |
| 4553 | case R_CKCORE_PCREL_IMM11BY2: |
| 4554 | case R_CKCORE_CALLGRAPH: |
| 4555 | /* Emit callgraph information first. */ |
| 4556 | /* TODO: deal with callgraph. */ |
| 4557 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_CALLGRAPH) |
| 4558 | break; |
| 4559 | /* Some reloc need further handling. */ |
| 4560 | /* h == NULL means the symbol is a local symbol, |
| 4561 | r_symndx == 0 means the symbol is 'ABS' and |
| 4562 | the relocation is already handled in assemble, |
| 4563 | here just use for callgraph. */ |
| 4564 | /* TODO: deal with callgraph. */ |
| 4565 | if (h == NULL && r_symndx == 0) |
| 4566 | { |
| 4567 | do_final_relocate = FALSE; |
| 4568 | break; |
| 4569 | } |
| 4570 | |
| 4571 | /* Ignore weak references to undefined symbols. */ |
| 4572 | if (h != NULL && h->root.type == bfd_link_hash_undefweak) |
| 4573 | { |
| 4574 | do_final_relocate = FALSE; |
| 4575 | break; |
| 4576 | } |
| 4577 | |
| 4578 | /* Using branch stub. */ |
| 4579 | if (use_branch_stub == TRUE |
| 4580 | && ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_IMM26BY2) |
| 4581 | { |
| 4582 | struct elf32_csky_stub_hash_entry *stub_entry = NULL; |
| 4583 | if (sym_must_create_stub (h, info)) |
| 4584 | stub_entry = elf32_csky_get_stub_entry (input_section, |
| 4585 | input_section, |
| 4586 | h, rel, htab); |
| 4587 | else if (disp > BSR_MAX_FWD_BRANCH_OFFSET |
| 4588 | || disp < BSR_MAX_BWD_BRANCH_OFFSET) |
| 4589 | stub_entry = elf32_csky_get_stub_entry (input_section, |
| 4590 | input_section, |
| 4591 | h, rel, htab); |
| 4592 | if (stub_entry != NULL) |
| 4593 | relocation |
| 4594 | = (stub_entry->stub_offset |
| 4595 | + stub_entry->stub_sec->output_offset |
| 4596 | + stub_entry->stub_sec->output_section->vma); |
| 4597 | break; |
| 4598 | } |
| 4599 | |
| 4600 | else if (h == NULL |
| 4601 | || (h->root.type == bfd_link_hash_defined |
| 4602 | && h->dynindx == -1) |
| 4603 | || ((h->def_regular && !h->def_dynamic) |
| 4604 | && (h->root.type != bfd_link_hash_defweak |
| 4605 | || ! bfd_link_pic (info)))) |
| 4606 | { |
| 4607 | if (ELF32_R_TYPE (rel->r_info) == R_CKCORE_PCREL_JSR_IMM26BY2) |
| 4608 | { |
| 4609 | if (within_range (disp, 26)) |
| 4610 | { |
| 4611 | /* In range for BSR32. */ |
| 4612 | howto = &csky_elf_howto_table[R_CKCORE_PCREL_IMM26BY2]; |
| 4613 | read_content_substitute = CSKY_INSN_BSR32; |
| 4614 | } |
| 4615 | else if (bfd_csky_arch (output_bfd) == CSKY_ARCH_810) |
| 4616 | /* if bsr32 cannot reach, generate |
| 4617 | "lrw r25, label; jsr r25" instead of |
| 4618 | jsri label. */ |
| 4619 | howto = &csky_elf_howto_table[R_CKCORE_NOJSRI]; |
| 4620 | } /* if ELF32_R_TYPE (rel->r_info)... */ |
| 4621 | else if (ELF32_R_TYPE (rel->r_info) |
| 4622 | == R_CKCORE_PCREL_JSR_IMM11BY2) |
| 4623 | { |
| 4624 | if (within_range (disp, 11)) |
| 4625 | { |
| 4626 | /* In range for BSR16. */ |
| 4627 | howto = &csky_elf_howto_table[R_CKCORE_PCREL_IMM11BY2]; |
| 4628 | read_content_substitute = CSKY_INSN_BSR16; |
| 4629 | } |
| 4630 | } |
| 4631 | break; |
| 4632 | } /* else if h == NULL... */ |
| 4633 | |
| 4634 | else if (bfd_csky_arch (output_bfd) == CSKY_ARCH_810 |
| 4635 | && (ELF32_R_TYPE (rel->r_info) |
| 4636 | == R_CKCORE_PCREL_JSR_IMM26BY2)) |
| 4637 | { |
| 4638 | howto = &csky_elf_howto_table[R_CKCORE_NOJSRI]; |
| 4639 | break; |
| 4640 | } |
| 4641 | /* Other situation, h->def_dynamic == 1, |
| 4642 | undefined_symbol when output file is shared object, etc. */ |
| 4643 | /* Else fall through. */ |
| 4644 | |
| 4645 | case R_CKCORE_ADDR_HI16: |
| 4646 | case R_CKCORE_ADDR_LO16: |
| 4647 | if (bfd_link_pic (info) |
| 4648 | || (!bfd_link_pic (info) |
| 4649 | && h != NULL |
| 4650 | && h->dynindx != -1 |
| 4651 | && !h->non_got_ref |
| 4652 | && ((h->def_dynamic && !h->def_regular) |
| 4653 | || (htab->elf.dynamic_sections_created |
| 4654 | && (h->root.type == bfd_link_hash_undefweak |
| 4655 | || h->root.type == bfd_link_hash_undefined |
| 4656 | || h->root.type == bfd_link_hash_indirect))))) |
| 4657 | { |
| 4658 | Elf_Internal_Rela outrel; |
| 4659 | bfd_boolean skip, relocate; |
| 4660 | bfd_byte *loc; |
| 4661 | |
| 4662 | /* When generating a shared object, these relocations |
| 4663 | are copied into the output file to be resolved at |
| 4664 | run time. */ |
| 4665 | skip = FALSE; |
| 4666 | relocate = FALSE; |
| 4667 | |
| 4668 | outrel.r_offset = |
| 4669 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 4670 | rel->r_offset); |
| 4671 | if (outrel.r_offset == (bfd_vma) -1) |
| 4672 | skip = TRUE; |
| 4673 | else if (outrel.r_offset == (bfd_vma) -2) |
| 4674 | { |
| 4675 | skip = TRUE; |
| 4676 | relocate = TRUE; |
| 4677 | } |
| 4678 | outrel.r_offset += (input_section->output_section->vma |
| 4679 | + input_section->output_offset); |
| 4680 | if (skip) |
| 4681 | memset (&outrel, 0, sizeof (outrel)); |
| 4682 | else if (h != NULL |
| 4683 | && h->dynindx != -1 |
| 4684 | && (!bfd_link_pic (info) |
| 4685 | || (!SYMBOLIC_BIND (info, h) |
| 4686 | && h->root.type == bfd_link_hash_defweak) |
| 4687 | || !h->def_regular)) |
| 4688 | { |
| 4689 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 4690 | outrel.r_addend = rel->r_addend; |
| 4691 | } |
| 4692 | else |
| 4693 | { |
| 4694 | /* This symbol is local, or marked to become local. */ |
| 4695 | relocate = TRUE; |
| 4696 | outrel.r_info = ELF32_R_INFO (0, r_type); |
| 4697 | outrel.r_addend = relocation + rel->r_addend; |
| 4698 | } |
| 4699 | loc = htab->elf.srelgot->contents; |
| 4700 | loc += (htab->elf.srelgot->reloc_count++ |
| 4701 | * sizeof (Elf32_External_Rela)); |
| 4702 | |
| 4703 | if (loc != NULL) |
| 4704 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 4705 | |
| 4706 | /* If this reloc is against an external symbol, we do not |
| 4707 | want to diddle with the addend. Otherwise, we need to |
| 4708 | include the symbol value so that it becomes an addend |
| 4709 | for the dynamic reloc. */ |
| 4710 | if (!relocate) |
| 4711 | continue; |
| 4712 | } /* if bfd_link_pic (info) ... */ |
| 4713 | break; |
| 4714 | |
| 4715 | case R_CKCORE_ADDR32: |
| 4716 | /* r_symndx will be zero only for relocs against symbols |
| 4717 | from removed linkonce sections, or sections discarded |
| 4718 | by a linker script. |
| 4719 | This relocation don't nedd to handle, the value will |
| 4720 | be set to SEC_DISCARDED(0xffffffff). */ |
| 4721 | if (r_symndx == 0 |
| 4722 | && strcmp (sec->name, ".csky_stack_size") == 0) |
| 4723 | { |
| 4724 | do_final_relocate = FALSE; |
| 4725 | break; |
| 4726 | } |
| 4727 | if (r_symndx >= symtab_hdr->sh_info |
| 4728 | && h->non_got_ref |
| 4729 | && bfd_link_executable (info)) |
| 4730 | break; |
| 4731 | |
| 4732 | if (r_symndx == 0 || (input_section->flags & SEC_ALLOC) == 0) |
| 4733 | break; |
| 4734 | |
| 4735 | if (bfd_link_pic (info) |
| 4736 | || (h != NULL |
| 4737 | && h->dynindx != -1 |
| 4738 | && ((h->def_dynamic && !h->def_regular) |
| 4739 | || (htab->elf.dynamic_sections_created |
| 4740 | && (h->root.type == bfd_link_hash_undefweak |
| 4741 | || h->root.type == bfd_link_hash_undefined |
| 4742 | || h->root.type == bfd_link_hash_indirect))))) |
| 4743 | { |
| 4744 | Elf_Internal_Rela outrel; |
| 4745 | bfd_boolean skip, relocate; |
| 4746 | bfd_byte *loc; |
| 4747 | |
| 4748 | /* When generating a shared object, these relocations |
| 4749 | are copied into the output file to be resolved at |
| 4750 | run time. */ |
| 4751 | skip = FALSE; |
| 4752 | relocate = FALSE; |
| 4753 | |
| 4754 | outrel.r_offset = |
| 4755 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 4756 | rel->r_offset); |
| 4757 | |
| 4758 | if (outrel.r_offset == (bfd_vma) -1) |
| 4759 | skip = TRUE; |
| 4760 | else if (outrel.r_offset == (bfd_vma) -2) |
| 4761 | { |
| 4762 | skip = TRUE; |
| 4763 | relocate = TRUE; |
| 4764 | } |
| 4765 | |
| 4766 | outrel.r_offset += (input_section->output_section->vma |
| 4767 | + input_section->output_offset); |
| 4768 | |
| 4769 | if (skip) |
| 4770 | memset (&outrel, 0, sizeof (outrel)); |
| 4771 | else if (h != NULL |
| 4772 | && h->dynindx != -1 |
| 4773 | && (!bfd_link_pic (info) |
| 4774 | || (!SYMBOLIC_BIND (info, h) |
| 4775 | && h->root.type == bfd_link_hash_defweak) |
| 4776 | || !h->def_regular)) |
| 4777 | { |
| 4778 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 4779 | outrel.r_addend = rel->r_addend; |
| 4780 | } |
| 4781 | else |
| 4782 | { |
| 4783 | /* This symbol is local, or marked to become local. */ |
| 4784 | outrel.r_info = ELF32_R_INFO (0, R_CKCORE_RELATIVE); |
| 4785 | outrel.r_addend = relocation + rel->r_addend; |
| 4786 | } |
| 4787 | |
| 4788 | loc = htab->elf.srelgot->contents; |
| 4789 | loc += (htab->elf.srelgot->reloc_count++ |
| 4790 | * sizeof (Elf32_External_Rela)); |
| 4791 | |
| 4792 | if (loc != NULL) |
| 4793 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 4794 | |
| 4795 | /* If this reloc is against an external symbol, we do |
| 4796 | want to diddle with the addend. Otherwise, we need to |
| 4797 | include the symbol value so that it becomes an addend |
| 4798 | for the dynamic reloc. */ |
| 4799 | if (! relocate) |
| 4800 | continue; |
| 4801 | } |
| 4802 | break; |
| 4803 | |
| 4804 | case R_CKCORE_TLS_LDO32: |
| 4805 | relocation = relocation - dtpoff_base (info); |
| 4806 | break; |
| 4807 | |
| 4808 | case R_CKCORE_TLS_LDM32: |
| 4809 | BFD_ASSERT (htab->elf.sgot != NULL); |
| 4810 | off = htab->tls_ldm_got.offset; |
| 4811 | if (off & 1) |
| 4812 | off &= ~1; |
| 4813 | else |
| 4814 | { |
| 4815 | /* If we don't know the module number, |
| 4816 | create a relocation for it. */ |
| 4817 | if (!bfd_link_executable (info)) |
| 4818 | { |
| 4819 | Elf_Internal_Rela outrel; |
| 4820 | bfd_byte *loc; |
| 4821 | |
| 4822 | BFD_ASSERT (htab->elf.srelgot != NULL); |
| 4823 | outrel.r_addend = 0; |
| 4824 | outrel.r_offset |
| 4825 | = (htab->elf.sgot->output_section->vma |
| 4826 | + htab->elf.sgot->output_offset + off); |
| 4827 | outrel.r_info = ELF32_R_INFO (0, R_CKCORE_TLS_DTPMOD32); |
| 4828 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 4829 | htab->elf.sgot->contents + off); |
| 4830 | |
| 4831 | loc = htab->elf.srelgot->contents; |
| 4832 | loc += (htab->elf.srelgot->reloc_count++ |
| 4833 | * sizeof (Elf32_External_Rela)); |
| 4834 | if (loc) |
| 4835 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); |
| 4836 | } |
| 4837 | else |
| 4838 | bfd_put_32 (output_bfd, 1, |
| 4839 | htab->elf.sgot->contents + off); |
| 4840 | htab->tls_ldm_got.offset |= 1; |
| 4841 | } |
| 4842 | relocation |
| 4843 | = (htab->elf.sgot->output_section->vma |
| 4844 | + htab->elf.sgot->output_offset + off |
| 4845 | - (input_section->output_section->vma |
| 4846 | + input_section->output_offset + rel->r_offset)); |
| 4847 | break; |
| 4848 | case R_CKCORE_TLS_LE32: |
| 4849 | if (bfd_link_dll (info)) |
| 4850 | { |
| 4851 | _bfd_error_handler |
| 4852 | /* xgettext:c-format */ |
| 4853 | (_("%pB(%pA+%#" PRIx64 "): %s relocation not permitted " |
| 4854 | "in shared object"), |
| 4855 | input_bfd, input_section, (uint64_t)rel->r_offset, |
| 4856 | howto->name); |
| 4857 | return FALSE; |
| 4858 | } |
| 4859 | else |
| 4860 | relocation = tpoff (info, relocation); |
| 4861 | break; |
| 4862 | case R_CKCORE_TLS_GD32: |
| 4863 | case R_CKCORE_TLS_IE32: |
| 4864 | { |
| 4865 | int indx; |
| 4866 | char tls_type; |
| 4867 | |
| 4868 | BFD_ASSERT (htab->elf.sgot != NULL); |
| 4869 | |
| 4870 | indx = 0; |
| 4871 | if (h != NULL) |
| 4872 | { |
| 4873 | bfd_boolean dyn; |
| 4874 | dyn = htab->elf.dynamic_sections_created; |
| 4875 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| 4876 | bfd_link_pic (info), h) |
| 4877 | && (!bfd_link_pic (info) |
| 4878 | || !SYMBOL_REFERENCES_LOCAL (info, h))) |
| 4879 | { |
| 4880 | unresolved_reloc = FALSE; |
| 4881 | indx = h->dynindx; |
| 4882 | } |
| 4883 | off = h->got.offset; |
| 4884 | tls_type = ((struct csky_elf_link_hash_entry *)h)->tls_type; |
| 4885 | } |
| 4886 | else |
| 4887 | { |
| 4888 | BFD_ASSERT (local_got_offsets != NULL); |
| 4889 | off = local_got_offsets[r_symndx]; |
| 4890 | tls_type = csky_elf_local_got_tls_type (input_bfd)[r_symndx]; |
| 4891 | } |
| 4892 | |
| 4893 | BFD_ASSERT (tls_type != GOT_UNKNOWN); |
| 4894 | |
| 4895 | if (off & 1) |
| 4896 | off &= ~1; |
| 4897 | else |
| 4898 | { |
| 4899 | bfd_boolean need_relocs = FALSE; |
| 4900 | Elf_Internal_Rela outrel; |
| 4901 | bfd_byte *loc = NULL; |
| 4902 | int cur_off = off; |
| 4903 | /* The GOT entries have not been initialized yet. Do it |
| 4904 | now, and emit any relocations. If both an IE GOT and a |
| 4905 | GD GOT are necessary, we emit the GD first. */ |
| 4906 | if ((!bfd_link_executable (info) || indx != 0) |
| 4907 | && (h == NULL |
| 4908 | || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| 4909 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
| 4910 | || h->root.type != bfd_link_hash_undefined)) |
| 4911 | { |
| 4912 | need_relocs = TRUE; |
| 4913 | BFD_ASSERT (htab->elf.srelgot != NULL); |
| 4914 | |
| 4915 | loc = htab->elf.srelgot->contents; |
| 4916 | loc += (htab->elf.srelgot->reloc_count |
| 4917 | * sizeof (Elf32_External_Rela)); |
| 4918 | } |
| 4919 | if (tls_type & GOT_TLS_GD) |
| 4920 | { |
| 4921 | if (need_relocs) |
| 4922 | { |
| 4923 | outrel.r_addend = 0; |
| 4924 | outrel.r_offset |
| 4925 | = (htab->elf.sgot->output_section->vma |
| 4926 | + htab->elf.sgot->output_offset |
| 4927 | + cur_off); |
| 4928 | outrel.r_info |
| 4929 | = ELF32_R_INFO (indx, R_CKCORE_TLS_DTPMOD32); |
| 4930 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 4931 | htab->elf.sgot->contents + cur_off); |
| 4932 | if (loc) |
| 4933 | bfd_elf32_swap_reloca_out (output_bfd, |
| 4934 | &outrel, loc); |
| 4935 | loc += sizeof (Elf32_External_Rela); |
| 4936 | htab->elf.srelgot->reloc_count++; |
| 4937 | if (indx == 0) |
| 4938 | bfd_put_32 (output_bfd, |
| 4939 | relocation - dtpoff_base (info), |
| 4940 | (htab->elf.sgot->contents |
| 4941 | + cur_off + 4)); |
| 4942 | else |
| 4943 | { |
| 4944 | outrel.r_addend = 0; |
| 4945 | outrel.r_info |
| 4946 | = ELF32_R_INFO (indx, R_CKCORE_TLS_DTPOFF32); |
| 4947 | outrel.r_offset += 4; |
| 4948 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 4949 | (htab->elf.sgot->contents |
| 4950 | + cur_off + 4)); |
| 4951 | outrel.r_info = |
| 4952 | ELF32_R_INFO (indx, |
| 4953 | R_CKCORE_TLS_DTPOFF32); |
| 4954 | if (loc) |
| 4955 | bfd_elf32_swap_reloca_out (output_bfd, |
| 4956 | &outrel, |
| 4957 | loc); |
| 4958 | htab->elf.srelgot->reloc_count++; |
| 4959 | loc += sizeof (Elf32_External_Rela); |
| 4960 | } |
| 4961 | |
| 4962 | } |
| 4963 | else |
| 4964 | { |
| 4965 | /* If are not emitting relocations for a |
| 4966 | general dynamic reference, then we must be in a |
| 4967 | static link or an executable link with the |
| 4968 | symbol binding locally. Mark it as belonging |
| 4969 | to module 1, the executable. */ |
| 4970 | bfd_put_32 (output_bfd, 1, |
| 4971 | htab->elf.sgot->contents + cur_off); |
| 4972 | bfd_put_32 (output_bfd, |
| 4973 | relocation - dtpoff_base (info), |
| 4974 | htab->elf.sgot->contents |
| 4975 | + cur_off + 4); |
| 4976 | } |
| 4977 | cur_off += 8; |
| 4978 | } |
| 4979 | if (tls_type & GOT_TLS_IE) |
| 4980 | { |
| 4981 | if (need_relocs) |
| 4982 | { |
| 4983 | if (indx == 0) |
| 4984 | outrel.r_addend = relocation - dtpoff_base (info); |
| 4985 | else |
| 4986 | outrel.r_addend = 0; |
| 4987 | outrel.r_offset |
| 4988 | = (htab->elf.sgot->output_section->vma |
| 4989 | + htab->elf.sgot->output_offset + cur_off); |
| 4990 | outrel.r_info |
| 4991 | = ELF32_R_INFO (indx, R_CKCORE_TLS_TPOFF32); |
| 4992 | |
| 4993 | bfd_put_32 (output_bfd, outrel.r_addend, |
| 4994 | htab->elf.sgot->contents + cur_off); |
| 4995 | if (loc) |
| 4996 | bfd_elf32_swap_reloca_out (output_bfd, |
| 4997 | &outrel, loc); |
| 4998 | htab->elf.srelgot->reloc_count++; |
| 4999 | loc += sizeof (Elf32_External_Rela); |
| 5000 | } |
| 5001 | else |
| 5002 | bfd_put_32 (output_bfd, tpoff (info, relocation), |
| 5003 | htab->elf.sgot->contents + cur_off); |
| 5004 | } |
| 5005 | if (h != NULL) |
| 5006 | h->got.offset |= 1; |
| 5007 | else |
| 5008 | local_got_offsets[r_symndx] |= 1; |
| 5009 | } |
| 5010 | if ((tls_type & GOT_TLS_GD) && howto->type != R_CKCORE_TLS_GD32) |
| 5011 | off += 8; |
| 5012 | relocation |
| 5013 | = (htab->elf.sgot->output_section->vma |
| 5014 | + htab->elf.sgot->output_offset + off |
| 5015 | - (input_section->output_section->vma |
| 5016 | + input_section->output_offset |
| 5017 | + rel->r_offset)); |
| 5018 | break; |
| 5019 | } |
| 5020 | default: |
| 5021 | /* No substitution when final linking. */ |
| 5022 | read_content_substitute = 0; |
| 5023 | break; |
| 5024 | } /* End switch (howto->type). */ |
| 5025 | |
| 5026 | /* Make sure 32-bit data in the text section will not be affected by |
| 5027 | our special endianness. |
| 5028 | However, this currently affects noting, since the ADDR32 howto type |
| 5029 | does no change with the data read. But we may need this mechanism in |
| 5030 | the future. */ |
| 5031 | |
| 5032 | if (howto->size == 2 |
| 5033 | && (howto->type == R_CKCORE_ADDR32 |
| 5034 | || howto->type == R_CKCORE_PCREL32 |
| 5035 | || howto->type == R_CKCORE_GOT32 |
| 5036 | || howto->type == R_CKCORE_GOTOFF |
| 5037 | || howto->type == R_CKCORE_GOTPC |
| 5038 | || howto->type == R_CKCORE_PLT32 |
| 5039 | || howto->type == R_CKCORE_TLS_LE32 |
| 5040 | || howto->type == R_CKCORE_TLS_IE32 |
| 5041 | || howto->type == R_CKCORE_TLS_LDM32 |
| 5042 | || howto->type == R_CKCORE_TLS_GD32 |
| 5043 | || howto->type == R_CKCORE_TLS_LDO32 |
| 5044 | || howto->type == R_CKCORE_RELATIVE)) |
| 5045 | need_reverse_bits = 0; |
| 5046 | else |
| 5047 | need_reverse_bits = 1; |
| 5048 | /* Do the final link. */ |
| 5049 | if (howto->type != R_CKCORE_PCREL_JSR_IMM11BY2 |
| 5050 | && howto->type != R_CKCORE_PCREL_JSR_IMM26BY2 |
| 5051 | && howto->type != R_CKCORE_CALLGRAPH |
| 5052 | && do_final_relocate) |
| 5053 | r = csky_final_link_relocate (howto, input_bfd, input_section, |
| 5054 | contents, rel->r_offset, |
| 5055 | relocation, addend); |
| 5056 | |
| 5057 | if (r != bfd_reloc_ok) |
| 5058 | { |
| 5059 | ret = FALSE; |
| 5060 | switch (r) |
| 5061 | { |
| 5062 | default: |
| 5063 | break; |
| 5064 | case bfd_reloc_overflow: |
| 5065 | if (h != NULL) |
| 5066 | name = NULL; |
| 5067 | else |
| 5068 | { |
| 5069 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 5070 | symtab_hdr->sh_link, |
| 5071 | sym->st_name); |
| 5072 | if (name == NULL) |
| 5073 | break; |
| 5074 | if (*name == '\0') |
| 5075 | name = bfd_section_name (input_bfd, sec); |
| 5076 | } |
| 5077 | (*info->callbacks->reloc_overflow) |
| 5078 | (info, |
| 5079 | (h ? &h->root : NULL), |
| 5080 | name, howto->name, (bfd_vma) 0, |
| 5081 | input_bfd, input_section, rel->r_offset); |
| 5082 | break; |
| 5083 | } |
| 5084 | } |
| 5085 | } /* End for (;rel < relend; rel++). */ |
| 5086 | return ret; |
| 5087 | } |
| 5088 | |
| 5089 | static bfd_boolean |
| 5090 | csky_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
| 5091 | { |
| 5092 | int offset; |
| 5093 | size_t size; |
| 5094 | |
| 5095 | switch (note->descsz) |
| 5096 | { |
| 5097 | default: |
| 5098 | return FALSE; |
| 5099 | /* Sizeof (struct elf_prstatus) on C-SKY V1 arch. */ |
| 5100 | case 148: |
| 5101 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 5102 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
| 5103 | offset = 72; |
| 5104 | size = 72; |
| 5105 | break; |
| 5106 | /* Sizeof (struct elf_prstatus) on C-SKY V1 arch. */ |
| 5107 | case 220: |
| 5108 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
| 5109 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
| 5110 | offset = 72; |
| 5111 | size = 34 * 4; |
| 5112 | break; |
| 5113 | } |
| 5114 | /* Make a ".reg/999" section. */ |
| 5115 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
| 5116 | size, note->descpos + offset); |
| 5117 | } |
| 5118 | |
| 5119 | static bfd_boolean |
| 5120 | csky_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
| 5121 | { |
| 5122 | switch (note->descsz) |
| 5123 | { |
| 5124 | default: |
| 5125 | return FALSE; |
| 5126 | |
| 5127 | /* Sizeof (struct elf_prpsinfo) on linux csky. */ |
| 5128 | case 124: |
| 5129 | elf_tdata (abfd)->core->program |
| 5130 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
| 5131 | elf_tdata (abfd)->core->command |
| 5132 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
| 5133 | } |
| 5134 | |
| 5135 | /* Note that for some reason, a spurious space is tacked |
| 5136 | onto the end of the args in some (at least one anyway) |
| 5137 | implementations, so strip it off if it exists. */ |
| 5138 | { |
| 5139 | char *command = elf_tdata (abfd)->core->command; |
| 5140 | int n = strlen (command); |
| 5141 | |
| 5142 | if (0 < n && command[n - 1] == ' ') |
| 5143 | command[n - 1] = '\0'; |
| 5144 | } |
| 5145 | |
| 5146 | return TRUE; |
| 5147 | } |
| 5148 | |
| 5149 | /* End of external entry points for sizing and building linker stubs. */ |
| 5150 | |
| 5151 | /* CPU-related basic API. */ |
| 5152 | #define TARGET_BIG_SYM csky_elf32_be_vec |
| 5153 | #define TARGET_BIG_NAME "elf32-csky-big" |
| 5154 | #define TARGET_LITTLE_SYM csky_elf32_le_vec |
| 5155 | #define TARGET_LITTLE_NAME "elf32-csky-little" |
| 5156 | #define ELF_ARCH bfd_arch_csky |
| 5157 | #define ELF_MACHINE_CODE EM_CSKY |
| 5158 | #define ELF_MACHINE_ALT1 EM_CSKY_OLD |
| 5159 | #define ELF_MAXPAGESIZE 0x1000 |
| 5160 | #define elf_info_to_howto csky_elf_info_to_howto |
| 5161 | #define elf_info_to_howto_rel NULL |
| 5162 | #define elf_backend_special_sections csky_elf_special_sections |
| 5163 | #define bfd_elf32_bfd_link_hash_table_create csky_elf_link_hash_table_create |
| 5164 | |
| 5165 | /* Target related API. */ |
| 5166 | #define bfd_elf32_mkobject csky_elf_mkobject |
| 5167 | #define bfd_elf32_bfd_merge_private_bfd_data csky_elf_merge_private_bfd_data |
| 5168 | #define bfd_elf32_bfd_set_private_flags csky_elf_set_private_flags |
| 5169 | #define elf_backend_copy_indirect_symbol csky_elf_copy_indirect_symbol |
| 5170 | |
| 5171 | /* GC section related API. */ |
| 5172 | #define elf_backend_can_gc_sections 1 |
| 5173 | #define elf_backend_gc_mark_hook csky_elf_gc_mark_hook |
| 5174 | #define elf_backend_gc_mark_extra_sections elf32_csky_gc_mark_extra_sections |
| 5175 | |
| 5176 | /* Relocation related API. */ |
| 5177 | #define elf_backend_reloc_type_class csky_elf_reloc_type_class |
| 5178 | #define bfd_elf32_bfd_reloc_type_lookup csky_elf_reloc_type_lookup |
| 5179 | #define bfd_elf32_bfd_reloc_name_lookup csky_elf_reloc_name_lookup |
| 5180 | #define elf_backend_ignore_discarded_relocs csky_elf_ignore_discarded_relocs |
| 5181 | #define elf_backend_relocate_section csky_elf_relocate_section |
| 5182 | #define elf_backend_check_relocs csky_elf_check_relocs |
| 5183 | |
| 5184 | /* Dynamic relocate related API. */ |
| 5185 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
| 5186 | #define elf_backend_adjust_dynamic_symbol csky_elf_adjust_dynamic_symbol |
| 5187 | #define elf_backend_size_dynamic_sections csky_elf_size_dynamic_sections |
| 5188 | #define elf_backend_finish_dynamic_symbol csky_elf_finish_dynamic_symbol |
| 5189 | #define elf_backend_finish_dynamic_sections csky_elf_finish_dynamic_sections |
| 5190 | #define elf_backend_rela_normal 1 |
| 5191 | #define elf_backend_can_refcount 1 |
| 5192 | #define elf_backend_plt_readonly 1 |
| 5193 | #define elf_backend_want_got_sym 1 |
| 5194 | #define elf_backend_want_dynrelro 1 |
| 5195 | #define elf_backend_got_header_size 12 |
| 5196 | #define elf_backend_want_got_plt 1 |
| 5197 | |
| 5198 | /* C-SKY coredump support. */ |
| 5199 | #define elf_backend_grok_prstatus csky_elf_grok_prstatus |
| 5200 | #define elf_backend_grok_psinfo csky_elf_grok_psinfo |
| 5201 | |
| 5202 | #include "elf32-target.h" |