| 1 | /* BFD back-end for National Semiconductor's CR16 ELF |
| 2 | Copyright 2007 Free Software Foundation, Inc. |
| 3 | Written by M R Swami Reddy. |
| 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 Foundation, |
| 19 | Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "sysdep.h" |
| 22 | #include "bfd.h" |
| 23 | #include "bfdlink.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "libiberty.h" |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/cr16.h" |
| 28 | |
| 29 | /* cr16_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */ |
| 30 | |
| 31 | struct cr16_reloc_map |
| 32 | { |
| 33 | bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */ |
| 34 | unsigned short cr16_reloc_type; /* CR16 relocation type. */ |
| 35 | }; |
| 36 | |
| 37 | static const struct cr16_reloc_map cr16_reloc_map[R_CR16_MAX] = |
| 38 | { |
| 39 | {BFD_RELOC_NONE, R_CR16_NONE}, |
| 40 | {BFD_RELOC_CR16_NUM8, R_CR16_NUM8}, |
| 41 | {BFD_RELOC_CR16_NUM16, R_CR16_NUM16}, |
| 42 | {BFD_RELOC_CR16_NUM32, R_CR16_NUM32}, |
| 43 | {BFD_RELOC_CR16_NUM32a, R_CR16_NUM32a}, |
| 44 | {BFD_RELOC_CR16_REGREL4, R_CR16_REGREL4}, |
| 45 | {BFD_RELOC_CR16_REGREL4a, R_CR16_REGREL4a}, |
| 46 | {BFD_RELOC_CR16_REGREL14, R_CR16_REGREL14}, |
| 47 | {BFD_RELOC_CR16_REGREL14a, R_CR16_REGREL14a}, |
| 48 | {BFD_RELOC_CR16_REGREL16, R_CR16_REGREL16}, |
| 49 | {BFD_RELOC_CR16_REGREL20, R_CR16_REGREL20}, |
| 50 | {BFD_RELOC_CR16_REGREL20a, R_CR16_REGREL20a}, |
| 51 | {BFD_RELOC_CR16_ABS20, R_CR16_ABS20}, |
| 52 | {BFD_RELOC_CR16_ABS24, R_CR16_ABS24}, |
| 53 | {BFD_RELOC_CR16_IMM4, R_CR16_IMM4}, |
| 54 | {BFD_RELOC_CR16_IMM8, R_CR16_IMM8}, |
| 55 | {BFD_RELOC_CR16_IMM16, R_CR16_IMM16}, |
| 56 | {BFD_RELOC_CR16_IMM20, R_CR16_IMM20}, |
| 57 | {BFD_RELOC_CR16_IMM24, R_CR16_IMM24}, |
| 58 | {BFD_RELOC_CR16_IMM32, R_CR16_IMM32}, |
| 59 | {BFD_RELOC_CR16_IMM32a, R_CR16_IMM32a}, |
| 60 | {BFD_RELOC_CR16_DISP4, R_CR16_DISP4}, |
| 61 | {BFD_RELOC_CR16_DISP8, R_CR16_DISP8}, |
| 62 | {BFD_RELOC_CR16_DISP16, R_CR16_DISP16}, |
| 63 | {BFD_RELOC_CR16_DISP24, R_CR16_DISP24}, |
| 64 | {BFD_RELOC_CR16_DISP24a, R_CR16_DISP24a}, |
| 65 | {BFD_RELOC_CR16_SWITCH8, R_CR16_SWITCH8}, |
| 66 | {BFD_RELOC_CR16_SWITCH16, R_CR16_SWITCH16}, |
| 67 | {BFD_RELOC_CR16_SWITCH32, R_CR16_SWITCH32} |
| 68 | }; |
| 69 | |
| 70 | static reloc_howto_type cr16_elf_howto_table[] = |
| 71 | { |
| 72 | HOWTO (R_CR16_NONE, /* type */ |
| 73 | 0, /* rightshift */ |
| 74 | 2, /* size */ |
| 75 | 32, /* bitsize */ |
| 76 | FALSE, /* pc_relative */ |
| 77 | 0, /* bitpos */ |
| 78 | complain_overflow_dont, /* complain_on_overflow */ |
| 79 | bfd_elf_generic_reloc, /* special_function */ |
| 80 | "R_CR16_NONE", /* name */ |
| 81 | FALSE, /* partial_inplace */ |
| 82 | 0, /* src_mask */ |
| 83 | 0, /* dst_mask */ |
| 84 | FALSE), /* pcrel_offset */ |
| 85 | |
| 86 | HOWTO (R_CR16_NUM8, /* type */ |
| 87 | 0, /* rightshift */ |
| 88 | 0, /* size */ |
| 89 | 8, /* bitsize */ |
| 90 | FALSE, /* pc_relative */ |
| 91 | 0, /* bitpos */ |
| 92 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 93 | bfd_elf_generic_reloc, /* special_function */ |
| 94 | "R_CR16_NUM8", /* name */ |
| 95 | FALSE, /* partial_inplace */ |
| 96 | 0xff, /* src_mask */ |
| 97 | 0xff, /* dst_mask */ |
| 98 | FALSE), /* pcrel_offset */ |
| 99 | |
| 100 | HOWTO (R_CR16_NUM16, /* type */ |
| 101 | 0, /* rightshift */ |
| 102 | 1, /* size */ |
| 103 | 16, /* bitsize */ |
| 104 | FALSE, /* pc_relative */ |
| 105 | 0, /* bitpos */ |
| 106 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 107 | bfd_elf_generic_reloc, /* special_function */ |
| 108 | "R_CR16_NUM16", /* name */ |
| 109 | FALSE, /* partial_inplace */ |
| 110 | 0xffff, /* src_mask */ |
| 111 | 0xffff, /* dst_mask */ |
| 112 | FALSE), /* pcrel_offset */ |
| 113 | |
| 114 | HOWTO (R_CR16_NUM32, /* type */ |
| 115 | 0, /* rightshift */ |
| 116 | 2, /* size */ |
| 117 | 32, /* bitsize */ |
| 118 | FALSE, /* pc_relative */ |
| 119 | 0, /* bitpos */ |
| 120 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 121 | bfd_elf_generic_reloc, /* special_function */ |
| 122 | "R_CR16_NUM32", /* name */ |
| 123 | FALSE, /* partial_inplace */ |
| 124 | 0xffffffff, /* src_mask */ |
| 125 | 0xffffffff, /* dst_mask */ |
| 126 | FALSE), /* pcrel_offset */ |
| 127 | |
| 128 | HOWTO (R_CR16_NUM32a, /* type */ |
| 129 | 1, /* rightshift */ |
| 130 | 2, /* size */ |
| 131 | 32, /* bitsize */ |
| 132 | FALSE, /* pc_relative */ |
| 133 | 0, /* bitpos */ |
| 134 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 135 | bfd_elf_generic_reloc, /* special_function */ |
| 136 | "R_CR16_NUM32a", /* name */ |
| 137 | FALSE, /* partial_inplace */ |
| 138 | 0xffffffff, /* src_mask */ |
| 139 | 0xffffffff, /* dst_mask */ |
| 140 | FALSE), /* pcrel_offset */ |
| 141 | |
| 142 | HOWTO (R_CR16_REGREL4, /* type */ |
| 143 | 0, /* rightshift */ |
| 144 | 0, /* size */ |
| 145 | 4, /* bitsize */ |
| 146 | FALSE, /* pc_relative */ |
| 147 | 0, /* bitpos */ |
| 148 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 149 | bfd_elf_generic_reloc, /* special_function */ |
| 150 | "R_CR16_REGREL4", /* name */ |
| 151 | FALSE, /* partial_inplace */ |
| 152 | 0xf, /* src_mask */ |
| 153 | 0xf, /* dst_mask */ |
| 154 | FALSE), /* pcrel_offset */ |
| 155 | |
| 156 | HOWTO (R_CR16_REGREL4a, /* type */ |
| 157 | 0, /* rightshift */ |
| 158 | 0, /* size */ |
| 159 | 4, /* bitsize */ |
| 160 | FALSE, /* pc_relative */ |
| 161 | 0, /* bitpos */ |
| 162 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 163 | bfd_elf_generic_reloc, /* special_function */ |
| 164 | "R_CR16_REGREL4a", /* name */ |
| 165 | FALSE, /* partial_inplace */ |
| 166 | 0xf, /* src_mask */ |
| 167 | 0xf, /* dst_mask */ |
| 168 | FALSE), /* pcrel_offset */ |
| 169 | |
| 170 | HOWTO (R_CR16_REGREL14, /* type */ |
| 171 | 0, /* rightshift */ |
| 172 | 1, /* size */ |
| 173 | 14, /* bitsize */ |
| 174 | FALSE, /* pc_relative */ |
| 175 | 0, /* bitpos */ |
| 176 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 177 | bfd_elf_generic_reloc, /* special_function */ |
| 178 | "R_CR16_REGREL14", /* name */ |
| 179 | FALSE, /* partial_inplace */ |
| 180 | 0x3fff, /* src_mask */ |
| 181 | 0x3fff, /* dst_mask */ |
| 182 | FALSE), /* pcrel_offset */ |
| 183 | |
| 184 | HOWTO (R_CR16_REGREL14a, /* type */ |
| 185 | 0, /* rightshift */ |
| 186 | 1, /* size */ |
| 187 | 14, /* bitsize */ |
| 188 | FALSE, /* pc_relative */ |
| 189 | 0, /* bitpos */ |
| 190 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 191 | bfd_elf_generic_reloc, /* special_function */ |
| 192 | "R_CR16_REGREL14a", /* name */ |
| 193 | FALSE, /* partial_inplace */ |
| 194 | 0x3fff, /* src_mask */ |
| 195 | 0x3fff, /* dst_mask */ |
| 196 | FALSE), /* pcrel_offset */ |
| 197 | |
| 198 | HOWTO (R_CR16_REGREL16, /* type */ |
| 199 | 0, /* rightshift */ |
| 200 | 1, /* size */ |
| 201 | 16, /* bitsize */ |
| 202 | FALSE, /* pc_relative */ |
| 203 | 0, /* bitpos */ |
| 204 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 205 | bfd_elf_generic_reloc, /* special_function */ |
| 206 | "R_CR16_REGREL16", /* name */ |
| 207 | FALSE, /* partial_inplace */ |
| 208 | 0xffff, /* src_mask */ |
| 209 | 0xffff, /* dst_mask */ |
| 210 | FALSE), /* pcrel_offset */ |
| 211 | |
| 212 | HOWTO (R_CR16_REGREL20, /* type */ |
| 213 | 0, /* rightshift */ |
| 214 | 2, /* size */ |
| 215 | 20, /* bitsize */ |
| 216 | FALSE, /* pc_relative */ |
| 217 | 0, /* bitpos */ |
| 218 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 219 | bfd_elf_generic_reloc, /* special_function */ |
| 220 | "R_CR16_REGREL20", /* name */ |
| 221 | FALSE, /* partial_inplace */ |
| 222 | 0xfffff, /* src_mask */ |
| 223 | 0xfffff, /* dst_mask */ |
| 224 | FALSE), /* pcrel_offset */ |
| 225 | |
| 226 | HOWTO (R_CR16_REGREL20a, /* type */ |
| 227 | 0, /* rightshift */ |
| 228 | 2, /* size */ |
| 229 | 20, /* bitsize */ |
| 230 | FALSE, /* pc_relative */ |
| 231 | 0, /* bitpos */ |
| 232 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 233 | bfd_elf_generic_reloc, /* special_function */ |
| 234 | "R_CR16_REGREL20a", /* name */ |
| 235 | FALSE, /* partial_inplace */ |
| 236 | 0xfffff, /* src_mask */ |
| 237 | 0xfffff, /* dst_mask */ |
| 238 | FALSE), /* pcrel_offset */ |
| 239 | |
| 240 | HOWTO (R_CR16_ABS20, /* type */ |
| 241 | 0, /* rightshift */ |
| 242 | 2, /* size */ |
| 243 | 20, /* bitsize */ |
| 244 | FALSE, /* pc_relative */ |
| 245 | 0, /* bitpos */ |
| 246 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 247 | bfd_elf_generic_reloc, /* special_function */ |
| 248 | "R_CR16_ABS20", /* name */ |
| 249 | FALSE, /* partial_inplace */ |
| 250 | 0xfffff, /* src_mask */ |
| 251 | 0xfffff, /* dst_mask */ |
| 252 | FALSE), /* pcrel_offset */ |
| 253 | |
| 254 | HOWTO (R_CR16_ABS24, /* type */ |
| 255 | 0, /* rightshift */ |
| 256 | 2, /* size */ |
| 257 | 24, /* bitsize */ |
| 258 | FALSE, /* pc_relative */ |
| 259 | 0, /* bitpos */ |
| 260 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 261 | bfd_elf_generic_reloc, /* special_function */ |
| 262 | "R_CR16_ABS24", /* name */ |
| 263 | FALSE, /* partial_inplace */ |
| 264 | 0xffffff, /* src_mask */ |
| 265 | 0xffffff, /* dst_mask */ |
| 266 | FALSE), /* pcrel_offset */ |
| 267 | |
| 268 | HOWTO (R_CR16_IMM4, /* type */ |
| 269 | 0, /* rightshift */ |
| 270 | 0, /* size */ |
| 271 | 4, /* bitsize */ |
| 272 | FALSE, /* pc_relative */ |
| 273 | 0, /* bitpos */ |
| 274 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 275 | bfd_elf_generic_reloc, /* special_function */ |
| 276 | "R_CR16_IMM4", /* name */ |
| 277 | FALSE, /* partial_inplace */ |
| 278 | 0xf, /* src_mask */ |
| 279 | 0xf, /* dst_mask */ |
| 280 | FALSE), /* pcrel_offset */ |
| 281 | |
| 282 | HOWTO (R_CR16_IMM8, /* type */ |
| 283 | 0, /* rightshift */ |
| 284 | 0, /* size */ |
| 285 | 8, /* bitsize */ |
| 286 | FALSE, /* pc_relative */ |
| 287 | 0, /* bitpos */ |
| 288 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 289 | bfd_elf_generic_reloc, /* special_function */ |
| 290 | "R_CR16_IMM8", /* name */ |
| 291 | FALSE, /* partial_inplace */ |
| 292 | 0xff, /* src_mask */ |
| 293 | 0xff, /* dst_mask */ |
| 294 | FALSE), /* pcrel_offset */ |
| 295 | |
| 296 | HOWTO (R_CR16_IMM16, /* type */ |
| 297 | 0, /* rightshift */ |
| 298 | 1, /* size */ |
| 299 | 16, /* bitsize */ |
| 300 | FALSE, /* pc_relative */ |
| 301 | 0, /* bitpos */ |
| 302 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 303 | bfd_elf_generic_reloc, /* special_function */ |
| 304 | "R_CR16_IMM16", /* name */ |
| 305 | FALSE, /* partial_inplace */ |
| 306 | 0xffff, /* src_mask */ |
| 307 | 0xffff, /* dst_mask */ |
| 308 | FALSE), /* pcrel_offset */ |
| 309 | |
| 310 | HOWTO (R_CR16_IMM20, /* type */ |
| 311 | 0, /* rightshift */ |
| 312 | 2, /* size */ |
| 313 | 20, /* bitsize */ |
| 314 | FALSE, /* pc_relative */ |
| 315 | 0, /* bitpos */ |
| 316 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 317 | bfd_elf_generic_reloc, /* special_function */ |
| 318 | "R_CR16_IMM20", /* name */ |
| 319 | FALSE, /* partial_inplace */ |
| 320 | 0xfffff, /* src_mask */ |
| 321 | 0xfffff, /* dst_mask */ |
| 322 | FALSE), /* pcrel_offset */ |
| 323 | |
| 324 | HOWTO (R_CR16_IMM24, /* type */ |
| 325 | 0, /* rightshift */ |
| 326 | 2, /* size */ |
| 327 | 24, /* bitsize */ |
| 328 | FALSE, /* pc_relative */ |
| 329 | 0, /* bitpos */ |
| 330 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 331 | bfd_elf_generic_reloc, /* special_function */ |
| 332 | "R_CR16_IMM24", /* name */ |
| 333 | FALSE, /* partial_inplace */ |
| 334 | 0xffffff, /* src_mask */ |
| 335 | 0xffffff, /* dst_mask */ |
| 336 | FALSE), /* pcrel_offset */ |
| 337 | |
| 338 | HOWTO (R_CR16_IMM32, /* type */ |
| 339 | 0, /* rightshift */ |
| 340 | 2, /* size */ |
| 341 | 32, /* bitsize */ |
| 342 | FALSE, /* pc_relative */ |
| 343 | 0, /* bitpos */ |
| 344 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 345 | bfd_elf_generic_reloc, /* special_function */ |
| 346 | "R_CR16_IMM32", /* name */ |
| 347 | FALSE, /* partial_inplace */ |
| 348 | 0xffffffff, /* src_mask */ |
| 349 | 0xffffffff, /* dst_mask */ |
| 350 | FALSE), /* pcrel_offset */ |
| 351 | |
| 352 | HOWTO (R_CR16_IMM32a, /* type */ |
| 353 | 1, /* rightshift */ |
| 354 | 2, /* size */ |
| 355 | 32, /* bitsize */ |
| 356 | FALSE, /* pc_relative */ |
| 357 | 0, /* bitpos */ |
| 358 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 359 | bfd_elf_generic_reloc, /* special_function */ |
| 360 | "R_CR16_IMM32a", /* name */ |
| 361 | FALSE, /* partial_inplace */ |
| 362 | 0xffffffff, /* src_mask */ |
| 363 | 0xffffffff, /* dst_mask */ |
| 364 | FALSE), /* pcrel_offset */ |
| 365 | |
| 366 | HOWTO (R_CR16_DISP4, /* type */ |
| 367 | 1, /* rightshift */ |
| 368 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 369 | 4, /* bitsize */ |
| 370 | TRUE, /* pc_relative */ |
| 371 | 0, /* bitpos */ |
| 372 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 373 | bfd_elf_generic_reloc, /* special_function */ |
| 374 | "R_CR16_DISP4", /* name */ |
| 375 | FALSE, /* partial_inplace */ |
| 376 | 0xf, /* src_mask */ |
| 377 | 0xf, /* dst_mask */ |
| 378 | FALSE), /* pcrel_offset */ |
| 379 | |
| 380 | HOWTO (R_CR16_DISP8, /* type */ |
| 381 | 1, /* rightshift */ |
| 382 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 383 | 8, /* bitsize */ |
| 384 | TRUE, /* pc_relative */ |
| 385 | 0, /* bitpos */ |
| 386 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 387 | bfd_elf_generic_reloc, /* special_function */ |
| 388 | "R_CR16_DISP8", /* name */ |
| 389 | FALSE, /* partial_inplace */ |
| 390 | 0x1ff, /* src_mask */ |
| 391 | 0x1ff, /* dst_mask */ |
| 392 | FALSE), /* pcrel_offset */ |
| 393 | |
| 394 | HOWTO (R_CR16_DISP16, /* type */ |
| 395 | 0, /* rightshift REVIITS: To sync with WinIDEA*/ |
| 396 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 397 | 16, /* bitsize */ |
| 398 | TRUE, /* pc_relative */ |
| 399 | 0, /* bitpos */ |
| 400 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 401 | bfd_elf_generic_reloc, /* special_function */ |
| 402 | "R_CR16_DISP16", /* name */ |
| 403 | FALSE, /* partial_inplace */ |
| 404 | 0x1ffff, /* src_mask */ |
| 405 | 0x1ffff, /* dst_mask */ |
| 406 | FALSE), /* pcrel_offset */ |
| 407 | /* REVISIT: DISP24 should be left-shift by 2 as per ISA doc |
| 408 | but its not done, to sync with WinIDEA and CR16 4.1 tools */ |
| 409 | HOWTO (R_CR16_DISP24, /* type */ |
| 410 | 0, /* rightshift */ |
| 411 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 412 | 24, /* bitsize */ |
| 413 | TRUE, /* pc_relative */ |
| 414 | 0, /* bitpos */ |
| 415 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 416 | bfd_elf_generic_reloc, /* special_function */ |
| 417 | "R_CR16_DISP24", /* name */ |
| 418 | FALSE, /* partial_inplace */ |
| 419 | 0x1ffffff, /* src_mask */ |
| 420 | 0x1ffffff, /* dst_mask */ |
| 421 | FALSE), /* pcrel_offset */ |
| 422 | |
| 423 | HOWTO (R_CR16_DISP24a, /* type */ |
| 424 | 0, /* rightshift */ |
| 425 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 426 | 24, /* bitsize */ |
| 427 | TRUE, /* pc_relative */ |
| 428 | 0, /* bitpos */ |
| 429 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 430 | bfd_elf_generic_reloc, /* special_function */ |
| 431 | "R_CR16_DISP24a", /* name */ |
| 432 | FALSE, /* partial_inplace */ |
| 433 | 0xffffff, /* src_mask */ |
| 434 | 0xffffff, /* dst_mask */ |
| 435 | FALSE), /* pcrel_offset */ |
| 436 | |
| 437 | /* An 8 bit switch table entry. This is generated for an expression |
| 438 | such as ``.byte L1 - L2''. The offset holds the difference |
| 439 | between the reloc address and L2. */ |
| 440 | HOWTO (R_CR16_SWITCH8, /* type */ |
| 441 | 0, /* rightshift */ |
| 442 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 443 | 8, /* bitsize */ |
| 444 | FALSE, /* pc_relative */ |
| 445 | 0, /* bitpos */ |
| 446 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 447 | bfd_elf_generic_reloc, /* special_function */ |
| 448 | "R_CR16_SWITCH8", /* name */ |
| 449 | FALSE, /* partial_inplace */ |
| 450 | 0xff, /* src_mask */ |
| 451 | 0xff, /* dst_mask */ |
| 452 | TRUE), /* pcrel_offset */ |
| 453 | |
| 454 | /* A 16 bit switch table entry. This is generated for an expression |
| 455 | such as ``.word L1 - L2''. The offset holds the difference |
| 456 | between the reloc address and L2. */ |
| 457 | HOWTO (R_CR16_SWITCH16, /* type */ |
| 458 | 0, /* rightshift */ |
| 459 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 460 | 16, /* bitsize */ |
| 461 | FALSE, /* pc_relative */ |
| 462 | 0, /* bitpos */ |
| 463 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 464 | bfd_elf_generic_reloc, /* special_function */ |
| 465 | "R_CR16_SWITCH16", /* name */ |
| 466 | FALSE, /* partial_inplace */ |
| 467 | 0xffff, /* src_mask */ |
| 468 | 0xffff, /* dst_mask */ |
| 469 | TRUE), /* pcrel_offset */ |
| 470 | |
| 471 | /* A 32 bit switch table entry. This is generated for an expression |
| 472 | such as ``.long L1 - L2''. The offset holds the difference |
| 473 | between the reloc address and L2. */ |
| 474 | HOWTO (R_CR16_SWITCH32, /* type */ |
| 475 | 0, /* rightshift */ |
| 476 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 477 | 32, /* bitsize */ |
| 478 | FALSE, /* pc_relative */ |
| 479 | 0, /* bitpos */ |
| 480 | complain_overflow_unsigned, /* complain_on_overflow */ |
| 481 | bfd_elf_generic_reloc, /* special_function */ |
| 482 | "R_CR16_SWITCH32", /* name */ |
| 483 | FALSE, /* partial_inplace */ |
| 484 | 0xffffffff, /* src_mask */ |
| 485 | 0xffffffff, /* dst_mask */ |
| 486 | TRUE) /* pcrel_offset */ |
| 487 | }; |
| 488 | |
| 489 | /* Retrieve a howto ptr using a BFD reloc_code. */ |
| 490 | |
| 491 | static reloc_howto_type * |
| 492 | elf_cr16_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 493 | bfd_reloc_code_real_type code) |
| 494 | { |
| 495 | unsigned int i; |
| 496 | |
| 497 | for (i = 0; i < R_CR16_MAX; i++) |
| 498 | if (code == cr16_reloc_map[i].bfd_reloc_enum) |
| 499 | return &cr16_elf_howto_table[cr16_reloc_map[i].cr16_reloc_type]; |
| 500 | |
| 501 | _bfd_error_handler ("Unsupported CR16 relocation type: 0x%x\n", code); |
| 502 | return NULL; |
| 503 | } |
| 504 | |
| 505 | static reloc_howto_type * |
| 506 | elf_cr16_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 507 | const char *r_name) |
| 508 | { |
| 509 | unsigned int i; |
| 510 | |
| 511 | for (i = 0; ARRAY_SIZE (cr16_elf_howto_table); i++) |
| 512 | if (cr16_elf_howto_table[i].name != NULL |
| 513 | && strcasecmp (cr16_elf_howto_table[i].name, r_name) == 0) |
| 514 | return cr16_elf_howto_table + i; |
| 515 | |
| 516 | return NULL; |
| 517 | } |
| 518 | |
| 519 | /* Retrieve a howto ptr using an internal relocation entry. */ |
| 520 | |
| 521 | static void |
| 522 | elf_cr16_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
| 523 | Elf_Internal_Rela *dst) |
| 524 | { |
| 525 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); |
| 526 | |
| 527 | BFD_ASSERT (r_type < (unsigned int) R_CR16_MAX); |
| 528 | cache_ptr->howto = &cr16_elf_howto_table[r_type]; |
| 529 | } |
| 530 | |
| 531 | /* Perform a relocation as part of a final link. */ |
| 532 | |
| 533 | static bfd_reloc_status_type |
| 534 | cr16_elf_final_link_relocate (reloc_howto_type *howto, |
| 535 | bfd *input_bfd, |
| 536 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 537 | asection *input_section, |
| 538 | bfd_byte *contents, |
| 539 | bfd_vma offset, |
| 540 | bfd_vma Rvalue, |
| 541 | bfd_vma addend, |
| 542 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 543 | asection *sec ATTRIBUTE_UNUSED, |
| 544 | int is_local ATTRIBUTE_UNUSED) |
| 545 | { |
| 546 | unsigned short r_type = howto->type; |
| 547 | bfd_byte *hit_data = contents + offset; |
| 548 | bfd_vma reloc_bits, check, Rvalue1; |
| 549 | |
| 550 | switch (r_type) |
| 551 | { |
| 552 | case R_CR16_IMM4: |
| 553 | case R_CR16_IMM20: |
| 554 | case R_CR16_ABS20: |
| 555 | break; |
| 556 | |
| 557 | case R_CR16_IMM8: |
| 558 | case R_CR16_IMM16: |
| 559 | case R_CR16_IMM32: |
| 560 | case R_CR16_IMM32a: |
| 561 | case R_CR16_REGREL4: |
| 562 | case R_CR16_REGREL4a: |
| 563 | case R_CR16_REGREL14: |
| 564 | case R_CR16_REGREL14a: |
| 565 | case R_CR16_REGREL16: |
| 566 | case R_CR16_REGREL20: |
| 567 | case R_CR16_ABS24: |
| 568 | case R_CR16_DISP16: |
| 569 | case R_CR16_DISP24: |
| 570 | /* 'hit_data' is relative to the start of the instruction, not the |
| 571 | relocation offset. Advance it to account for the exact offset. */ |
| 572 | hit_data += 2; |
| 573 | break; |
| 574 | |
| 575 | case R_CR16_NONE: |
| 576 | return bfd_reloc_ok; |
| 577 | break; |
| 578 | |
| 579 | case R_CR16_DISP4: |
| 580 | if (is_local) |
| 581 | Rvalue += -1; |
| 582 | break; |
| 583 | |
| 584 | case R_CR16_DISP8: |
| 585 | case R_CR16_DISP24a: |
| 586 | if (is_local) |
| 587 | Rvalue -= -1; |
| 588 | break; |
| 589 | |
| 590 | case R_CR16_SWITCH8: |
| 591 | case R_CR16_SWITCH16: |
| 592 | case R_CR16_SWITCH32: |
| 593 | /* We only care about the addend, where the difference between |
| 594 | expressions is kept. */ |
| 595 | Rvalue = 0; |
| 596 | |
| 597 | default: |
| 598 | break; |
| 599 | } |
| 600 | |
| 601 | if (howto->pc_relative) |
| 602 | { |
| 603 | /* Subtract the address of the section containing the location. */ |
| 604 | Rvalue -= (input_section->output_section->vma |
| 605 | + input_section->output_offset); |
| 606 | /* Subtract the position of the location within the section. */ |
| 607 | Rvalue -= offset; |
| 608 | } |
| 609 | |
| 610 | /* Add in supplied addend. */ |
| 611 | Rvalue += addend; |
| 612 | |
| 613 | /* Complain if the bitfield overflows, whether it is considered |
| 614 | as signed or unsigned. */ |
| 615 | check = Rvalue >> howto->rightshift; |
| 616 | |
| 617 | /* Assumes two's complement. This expression avoids |
| 618 | overflow if howto->bitsize is the number of bits in |
| 619 | bfd_vma. */ |
| 620 | reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1; |
| 621 | |
| 622 | if (((bfd_vma) check & ~reloc_bits) != 0 |
| 623 | && (((bfd_vma) check & ~reloc_bits) |
| 624 | != (-(bfd_vma) 1 & ~reloc_bits))) |
| 625 | { |
| 626 | /* The above right shift is incorrect for a signed |
| 627 | value. See if turning on the upper bits fixes the |
| 628 | overflow. */ |
| 629 | if (howto->rightshift && (bfd_signed_vma) Rvalue < 0) |
| 630 | { |
| 631 | check |= ((bfd_vma) - 1 |
| 632 | & ~((bfd_vma) - 1 |
| 633 | >> howto->rightshift)); |
| 634 | |
| 635 | if (((bfd_vma) check & ~reloc_bits) |
| 636 | != (-(bfd_vma) 1 & ~reloc_bits)) |
| 637 | return bfd_reloc_overflow; |
| 638 | } |
| 639 | else |
| 640 | return bfd_reloc_overflow; |
| 641 | } |
| 642 | |
| 643 | /* Drop unwanted bits from the value we are relocating to. */ |
| 644 | Rvalue >>= (bfd_vma) howto->rightshift; |
| 645 | |
| 646 | /* Apply dst_mask to select only relocatable part of the insn. */ |
| 647 | Rvalue &= howto->dst_mask; |
| 648 | |
| 649 | switch (howto->size) |
| 650 | { |
| 651 | case 0: |
| 652 | if (r_type == R_CR16_DISP8) |
| 653 | { |
| 654 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
| 655 | Rvalue = ((Rvalue1 & 0xf000) | ((Rvalue << 4) & 0xf00) |
| 656 | | (Rvalue1 & 0x00f0) | (Rvalue & 0xf)); |
| 657 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
| 658 | } |
| 659 | else if (r_type == R_CR16_IMM4) |
| 660 | { |
| 661 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
| 662 | Rvalue = (((Rvalue1 & 0xff) << 8) | ((Rvalue << 4) & 0xf0) |
| 663 | | ((Rvalue1 & 0x0f00) >> 8)); |
| 664 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
| 665 | } |
| 666 | else if (r_type == R_CR16_DISP4) |
| 667 | { |
| 668 | Rvalue1 = bfd_get_16 (input_bfd, hit_data); |
| 669 | Rvalue = (Rvalue1 | ((Rvalue & 0xf) << 4)); |
| 670 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
| 671 | } |
| 672 | else |
| 673 | { |
| 674 | bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data); |
| 675 | } |
| 676 | break; |
| 677 | |
| 678 | case 1: |
| 679 | if (r_type == R_CR16_DISP16) |
| 680 | { |
| 681 | Rvalue |= (bfd_get_16 (input_bfd, hit_data)); |
| 682 | Rvalue = ((Rvalue & 0xfffe) | ((Rvalue >> 16) & 0x1)); |
| 683 | } |
| 684 | |
| 685 | bfd_put_16 (input_bfd, Rvalue, hit_data); |
| 686 | break; |
| 687 | |
| 688 | case 2: |
| 689 | if ((r_type == R_CR16_ABS20) || (r_type == R_CR16_IMM20)) |
| 690 | { |
| 691 | bfd_put_16 (input_bfd, (bfd_get_16 (input_bfd, hit_data)) |
| 692 | | ((Rvalue >> 16) & 0xf), hit_data); |
| 693 | bfd_put_16 (input_bfd, (Rvalue) & 0xffff, hit_data + 2); |
| 694 | } |
| 695 | else |
| 696 | { |
| 697 | if (r_type == R_CR16_ABS24) |
| 698 | { |
| 699 | Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >> 16) & 0xf) << 8) |
| 700 | | (bfd_get_16 (input_bfd, hit_data))) |
| 701 | | ((Rvalue & 0xffff) << 16)); |
| 702 | } |
| 703 | if (r_type == R_CR16_DISP24) |
| 704 | { |
| 705 | Rvalue = ((((Rvalue >> 20)& 0xf) | (((Rvalue >>16) & 0xf) << 8) |
| 706 | | (bfd_get_16 (input_bfd, hit_data))) |
| 707 | | (((Rvalue & 0xfffe) |
| 708 | | ((Rvalue >> 24) & 0x1)) << 16)); |
| 709 | } |
| 710 | else if ((r_type == R_CR16_IMM32) ||(r_type == R_CR16_IMM32a)) |
| 711 | { |
| 712 | Rvalue = (((Rvalue >> 16)& 0xffff) |
| 713 | | (bfd_get_16 (input_bfd, hit_data))) |
| 714 | | ((Rvalue & 0xffff) << 16); |
| 715 | } |
| 716 | else if (r_type == R_CR16_DISP24a) |
| 717 | { |
| 718 | Rvalue = (((Rvalue & 0xfffffe) | (Rvalue >> 23))); |
| 719 | Rvalue = ((Rvalue >> 16) & 0xff) | ((Rvalue & 0xffff) << 16) |
| 720 | | (bfd_get_32 (input_bfd, hit_data)); |
| 721 | } |
| 722 | |
| 723 | bfd_put_32 (input_bfd, Rvalue, hit_data); |
| 724 | } |
| 725 | break; |
| 726 | |
| 727 | default: |
| 728 | return bfd_reloc_notsupported; |
| 729 | } |
| 730 | |
| 731 | return bfd_reloc_ok; |
| 732 | } |
| 733 | |
| 734 | /* Delete some bytes from a section while relaxing. */ |
| 735 | |
| 736 | static bfd_boolean |
| 737 | elf32_cr16_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd, |
| 738 | asection *sec, bfd_vma addr, int count) |
| 739 | { |
| 740 | Elf_Internal_Shdr *symtab_hdr; |
| 741 | unsigned int sec_shndx; |
| 742 | bfd_byte *contents; |
| 743 | Elf_Internal_Rela *irel, *irelend; |
| 744 | Elf_Internal_Rela *irelalign; |
| 745 | bfd_vma toaddr; |
| 746 | Elf_Internal_Sym *isym; |
| 747 | Elf_Internal_Sym *isymend; |
| 748 | struct elf_link_hash_entry **sym_hashes; |
| 749 | struct elf_link_hash_entry **end_hashes; |
| 750 | struct elf_link_hash_entry **start_hashes; |
| 751 | unsigned int symcount; |
| 752 | |
| 753 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 754 | |
| 755 | contents = elf_section_data (sec)->this_hdr.contents; |
| 756 | |
| 757 | /* The deletion must stop at the next ALIGN reloc for an aligment |
| 758 | power larger than the number of bytes we are deleting. */ |
| 759 | irelalign = NULL; |
| 760 | toaddr = sec->size; |
| 761 | |
| 762 | irel = elf_section_data (sec)->relocs; |
| 763 | irelend = irel + sec->reloc_count; |
| 764 | |
| 765 | /* Actually delete the bytes. */ |
| 766 | memmove (contents + addr, contents + addr + count, |
| 767 | (size_t) (toaddr - addr - count)); |
| 768 | sec->size -= count; |
| 769 | |
| 770 | /* Adjust all the relocs. */ |
| 771 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| 772 | /* Get the new reloc address. */ |
| 773 | if ((irel->r_offset > addr && irel->r_offset < toaddr)) |
| 774 | irel->r_offset -= count; |
| 775 | |
| 776 | /* Adjust the local symbols defined in this section. */ |
| 777 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 778 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 779 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| 780 | { |
| 781 | if (isym->st_shndx == sec_shndx |
| 782 | && isym->st_value > addr |
| 783 | && isym->st_value < toaddr) |
| 784 | { |
| 785 | /* Adjust the addend of SWITCH relocations in this section, |
| 786 | which reference this local symbol. */ |
| 787 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| 788 | { |
| 789 | unsigned long r_symndx; |
| 790 | Elf_Internal_Sym *rsym; |
| 791 | bfd_vma addsym, subsym; |
| 792 | |
| 793 | /* Skip if not a SWITCH relocation. */ |
| 794 | if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH8 |
| 795 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH16 |
| 796 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_SWITCH32) |
| 797 | continue; |
| 798 | |
| 799 | r_symndx = ELF32_R_SYM (irel->r_info); |
| 800 | rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx; |
| 801 | |
| 802 | /* Skip if not the local adjusted symbol. */ |
| 803 | if (rsym != isym) |
| 804 | continue; |
| 805 | |
| 806 | addsym = isym->st_value; |
| 807 | subsym = addsym - irel->r_addend; |
| 808 | |
| 809 | /* Fix the addend only when -->> (addsym > addr >= subsym). */ |
| 810 | if (subsym <= addr) |
| 811 | irel->r_addend -= count; |
| 812 | else |
| 813 | continue; |
| 814 | } |
| 815 | |
| 816 | isym->st_value -= count; |
| 817 | } |
| 818 | } |
| 819 | |
| 820 | /* Now adjust the global symbols defined in this section. */ |
| 821 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 822 | - symtab_hdr->sh_info); |
| 823 | sym_hashes = start_hashes = elf_sym_hashes (abfd); |
| 824 | end_hashes = sym_hashes + symcount; |
| 825 | |
| 826 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 827 | { |
| 828 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 829 | |
| 830 | /* The '--wrap SYMBOL' option is causing a pain when the object file, |
| 831 | containing the definition of __wrap_SYMBOL, includes a direct |
| 832 | call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference |
| 833 | the same symbol (which is __wrap_SYMBOL), but still exist as two |
| 834 | different symbols in 'sym_hashes', we don't want to adjust |
| 835 | the global symbol __wrap_SYMBOL twice. |
| 836 | This check is only relevant when symbols are being wrapped. */ |
| 837 | if (link_info->wrap_hash != NULL) |
| 838 | { |
| 839 | struct elf_link_hash_entry **cur_sym_hashes; |
| 840 | |
| 841 | /* Loop only over the symbols whom been already checked. */ |
| 842 | for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes; |
| 843 | cur_sym_hashes++) |
| 844 | /* If the current symbol is identical to 'sym_hash', that means |
| 845 | the symbol was already adjusted (or at least checked). */ |
| 846 | if (*cur_sym_hashes == sym_hash) |
| 847 | break; |
| 848 | |
| 849 | /* Don't adjust the symbol again. */ |
| 850 | if (cur_sym_hashes < sym_hashes) |
| 851 | continue; |
| 852 | } |
| 853 | |
| 854 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 855 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 856 | && sym_hash->root.u.def.section == sec |
| 857 | && sym_hash->root.u.def.value > addr |
| 858 | && sym_hash->root.u.def.value < toaddr) |
| 859 | sym_hash->root.u.def.value -= count; |
| 860 | } |
| 861 | |
| 862 | return TRUE; |
| 863 | } |
| 864 | |
| 865 | /* Relocate a CR16 ELF section. */ |
| 866 | |
| 867 | static bfd_boolean |
| 868 | elf32_cr16_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
| 869 | bfd *input_bfd, asection *input_section, |
| 870 | bfd_byte *contents, Elf_Internal_Rela *relocs, |
| 871 | Elf_Internal_Sym *local_syms, |
| 872 | asection **local_sections) |
| 873 | { |
| 874 | Elf_Internal_Shdr *symtab_hdr; |
| 875 | struct elf_link_hash_entry **sym_hashes; |
| 876 | Elf_Internal_Rela *rel, *relend; |
| 877 | |
| 878 | if (info->relocatable) |
| 879 | return TRUE; |
| 880 | |
| 881 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 882 | sym_hashes = elf_sym_hashes (input_bfd); |
| 883 | |
| 884 | rel = relocs; |
| 885 | relend = relocs + input_section->reloc_count; |
| 886 | for (; rel < relend; rel++) |
| 887 | { |
| 888 | int r_type; |
| 889 | reloc_howto_type *howto; |
| 890 | unsigned long r_symndx; |
| 891 | Elf_Internal_Sym *sym; |
| 892 | asection *sec; |
| 893 | struct elf_link_hash_entry *h; |
| 894 | bfd_vma relocation; |
| 895 | bfd_reloc_status_type r; |
| 896 | |
| 897 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 898 | r_type = ELF32_R_TYPE (rel->r_info); |
| 899 | howto = cr16_elf_howto_table + (r_type); |
| 900 | |
| 901 | h = NULL; |
| 902 | sym = NULL; |
| 903 | sec = NULL; |
| 904 | if (r_symndx < symtab_hdr->sh_info) |
| 905 | { |
| 906 | sym = local_syms + r_symndx; |
| 907 | sec = local_sections[r_symndx]; |
| 908 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 909 | } |
| 910 | else |
| 911 | { |
| 912 | bfd_boolean unresolved_reloc, warned; |
| 913 | |
| 914 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 915 | r_symndx, symtab_hdr, sym_hashes, |
| 916 | h, sec, relocation, |
| 917 | unresolved_reloc, warned); |
| 918 | } |
| 919 | |
| 920 | r = cr16_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| 921 | input_section, |
| 922 | contents, rel->r_offset, |
| 923 | relocation, rel->r_addend, |
| 924 | info, sec, h == NULL); |
| 925 | |
| 926 | if (r != bfd_reloc_ok) |
| 927 | { |
| 928 | const char *name; |
| 929 | const char *msg = NULL; |
| 930 | |
| 931 | if (h != NULL) |
| 932 | name = h->root.root.string; |
| 933 | else |
| 934 | { |
| 935 | name = (bfd_elf_string_from_elf_section |
| 936 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| 937 | if (name == NULL || *name == '\0') |
| 938 | name = bfd_section_name (input_bfd, sec); |
| 939 | } |
| 940 | |
| 941 | switch (r) |
| 942 | { |
| 943 | case bfd_reloc_overflow: |
| 944 | if (!((*info->callbacks->reloc_overflow) |
| 945 | (info, (h ? &h->root : NULL), name, howto->name, |
| 946 | (bfd_vma) 0, input_bfd, input_section, |
| 947 | rel->r_offset))) |
| 948 | return FALSE; |
| 949 | break; |
| 950 | |
| 951 | case bfd_reloc_undefined: |
| 952 | if (!((*info->callbacks->undefined_symbol) |
| 953 | (info, name, input_bfd, input_section, |
| 954 | rel->r_offset, TRUE))) |
| 955 | return FALSE; |
| 956 | break; |
| 957 | |
| 958 | case bfd_reloc_outofrange: |
| 959 | msg = _("internal error: out of range error"); |
| 960 | goto common_error; |
| 961 | |
| 962 | case bfd_reloc_notsupported: |
| 963 | msg = _("internal error: unsupported relocation error"); |
| 964 | goto common_error; |
| 965 | |
| 966 | case bfd_reloc_dangerous: |
| 967 | msg = _("internal error: dangerous error"); |
| 968 | goto common_error; |
| 969 | |
| 970 | default: |
| 971 | msg = _("internal error: unknown error"); |
| 972 | /* Fall through. */ |
| 973 | |
| 974 | common_error: |
| 975 | if (!((*info->callbacks->warning) |
| 976 | (info, msg, name, input_bfd, input_section, |
| 977 | rel->r_offset))) |
| 978 | return FALSE; |
| 979 | break; |
| 980 | } |
| 981 | } |
| 982 | } |
| 983 | |
| 984 | return TRUE; |
| 985 | } |
| 986 | |
| 987 | /* This is a version of bfd_generic_get_relocated_section_contents |
| 988 | which uses elf32_cr16_relocate_section. */ |
| 989 | |
| 990 | static bfd_byte * |
| 991 | elf32_cr16_get_relocated_section_contents (bfd *output_bfd, |
| 992 | struct bfd_link_info *link_info, |
| 993 | struct bfd_link_order *link_order, |
| 994 | bfd_byte *data, |
| 995 | bfd_boolean relocatable, |
| 996 | asymbol **symbols) |
| 997 | { |
| 998 | Elf_Internal_Shdr *symtab_hdr; |
| 999 | asection *input_section = link_order->u.indirect.section; |
| 1000 | bfd *input_bfd = input_section->owner; |
| 1001 | asection **sections = NULL; |
| 1002 | Elf_Internal_Rela *internal_relocs = NULL; |
| 1003 | Elf_Internal_Sym *isymbuf = NULL; |
| 1004 | |
| 1005 | /* We only need to handle the case of relaxing, or of having a |
| 1006 | particular set of section contents, specially. */ |
| 1007 | if (relocatable |
| 1008 | || elf_section_data (input_section)->this_hdr.contents == NULL) |
| 1009 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, |
| 1010 | link_order, data, |
| 1011 | relocatable, |
| 1012 | symbols); |
| 1013 | |
| 1014 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1015 | |
| 1016 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, |
| 1017 | (size_t) input_section->size); |
| 1018 | |
| 1019 | if ((input_section->flags & SEC_RELOC) != 0 |
| 1020 | && input_section->reloc_count > 0) |
| 1021 | { |
| 1022 | Elf_Internal_Sym *isym; |
| 1023 | Elf_Internal_Sym *isymend; |
| 1024 | asection **secpp; |
| 1025 | bfd_size_type amt; |
| 1026 | |
| 1027 | internal_relocs = _bfd_elf_link_read_relocs (input_bfd, input_section, |
| 1028 | NULL, NULL, FALSE); |
| 1029 | if (internal_relocs == NULL) |
| 1030 | goto error_return; |
| 1031 | |
| 1032 | if (symtab_hdr->sh_info != 0) |
| 1033 | { |
| 1034 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1035 | if (isymbuf == NULL) |
| 1036 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| 1037 | symtab_hdr->sh_info, 0, |
| 1038 | NULL, NULL, NULL); |
| 1039 | if (isymbuf == NULL) |
| 1040 | goto error_return; |
| 1041 | } |
| 1042 | |
| 1043 | amt = symtab_hdr->sh_info; |
| 1044 | amt *= sizeof (asection *); |
| 1045 | sections = bfd_malloc (amt); |
| 1046 | if (sections == NULL && amt != 0) |
| 1047 | goto error_return; |
| 1048 | |
| 1049 | isymend = isymbuf + symtab_hdr->sh_info; |
| 1050 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) |
| 1051 | { |
| 1052 | asection *isec; |
| 1053 | |
| 1054 | if (isym->st_shndx == SHN_UNDEF) |
| 1055 | isec = bfd_und_section_ptr; |
| 1056 | else if (isym->st_shndx == SHN_ABS) |
| 1057 | isec = bfd_abs_section_ptr; |
| 1058 | else if (isym->st_shndx == SHN_COMMON) |
| 1059 | isec = bfd_com_section_ptr; |
| 1060 | else |
| 1061 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
| 1062 | |
| 1063 | *secpp = isec; |
| 1064 | } |
| 1065 | |
| 1066 | if (! elf32_cr16_relocate_section (output_bfd, link_info, input_bfd, |
| 1067 | input_section, data, internal_relocs, |
| 1068 | isymbuf, sections)) |
| 1069 | goto error_return; |
| 1070 | |
| 1071 | if (sections != NULL) |
| 1072 | free (sections); |
| 1073 | if (isymbuf != NULL |
| 1074 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1075 | free (isymbuf); |
| 1076 | if (elf_section_data (input_section)->relocs != internal_relocs) |
| 1077 | free (internal_relocs); |
| 1078 | } |
| 1079 | |
| 1080 | return data; |
| 1081 | |
| 1082 | error_return: |
| 1083 | if (sections != NULL) |
| 1084 | free (sections); |
| 1085 | if (isymbuf != NULL |
| 1086 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1087 | free (isymbuf); |
| 1088 | if (internal_relocs != NULL |
| 1089 | && elf_section_data (input_section)->relocs != internal_relocs) |
| 1090 | free (internal_relocs); |
| 1091 | return NULL; |
| 1092 | } |
| 1093 | |
| 1094 | /* This function handles relaxing for the CR16. |
| 1095 | |
| 1096 | There's quite a few relaxing opportunites available on the CR16: |
| 1097 | |
| 1098 | * bcond:24 -> bcond:16 2 bytes |
| 1099 | * bcond:16 -> bcond:8 2 bytes |
| 1100 | * arithmetic imm32 -> arithmetic imm20/imm16 2 bytes |
| 1101 | * arithmetic imm20/imm16 -> arithmetic imm4 2 bytes |
| 1102 | |
| 1103 | Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ |
| 1104 | |
| 1105 | static bfd_boolean |
| 1106 | elf32_cr16_relax_section (bfd *abfd, asection *sec, |
| 1107 | struct bfd_link_info *link_info, bfd_boolean *again) |
| 1108 | { |
| 1109 | Elf_Internal_Shdr *symtab_hdr; |
| 1110 | Elf_Internal_Rela *internal_relocs; |
| 1111 | Elf_Internal_Rela *irel, *irelend; |
| 1112 | bfd_byte *contents = NULL; |
| 1113 | Elf_Internal_Sym *isymbuf = NULL; |
| 1114 | |
| 1115 | /* Assume nothing changes. */ |
| 1116 | *again = FALSE; |
| 1117 | |
| 1118 | /* We don't have to do anything for a relocatable link, if |
| 1119 | this section does not have relocs, or if this is not a |
| 1120 | code section. */ |
| 1121 | if (link_info->relocatable |
| 1122 | || (sec->flags & SEC_RELOC) == 0 |
| 1123 | || sec->reloc_count == 0 |
| 1124 | || (sec->flags & SEC_CODE) == 0) |
| 1125 | return TRUE; |
| 1126 | |
| 1127 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1128 | |
| 1129 | /* Get a copy of the native relocations. */ |
| 1130 | internal_relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
| 1131 | link_info->keep_memory); |
| 1132 | if (internal_relocs == NULL) |
| 1133 | goto error_return; |
| 1134 | |
| 1135 | /* Walk through them looking for relaxing opportunities. */ |
| 1136 | irelend = internal_relocs + sec->reloc_count; |
| 1137 | for (irel = internal_relocs; irel < irelend; irel++) |
| 1138 | { |
| 1139 | bfd_vma symval; |
| 1140 | |
| 1141 | /* If this isn't something that can be relaxed, then ignore |
| 1142 | this reloc. */ |
| 1143 | if (ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP16 |
| 1144 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_DISP24 |
| 1145 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM32 |
| 1146 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM20 |
| 1147 | && ELF32_R_TYPE (irel->r_info) != (int) R_CR16_IMM16) |
| 1148 | continue; |
| 1149 | |
| 1150 | /* Get the section contents if we haven't done so already. */ |
| 1151 | if (contents == NULL) |
| 1152 | { |
| 1153 | /* Get cached copy if it exists. */ |
| 1154 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 1155 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1156 | /* Go get them off disk. */ |
| 1157 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 1158 | goto error_return; |
| 1159 | } |
| 1160 | |
| 1161 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 1162 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 1163 | { |
| 1164 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1165 | if (isymbuf == NULL) |
| 1166 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 1167 | symtab_hdr->sh_info, 0, |
| 1168 | NULL, NULL, NULL); |
| 1169 | if (isymbuf == NULL) |
| 1170 | goto error_return; |
| 1171 | } |
| 1172 | |
| 1173 | /* Get the value of the symbol referred to by the reloc. */ |
| 1174 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 1175 | { |
| 1176 | /* A local symbol. */ |
| 1177 | Elf_Internal_Sym *isym; |
| 1178 | asection *sym_sec; |
| 1179 | |
| 1180 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 1181 | if (isym->st_shndx == SHN_UNDEF) |
| 1182 | sym_sec = bfd_und_section_ptr; |
| 1183 | else if (isym->st_shndx == SHN_ABS) |
| 1184 | sym_sec = bfd_abs_section_ptr; |
| 1185 | else if (isym->st_shndx == SHN_COMMON) |
| 1186 | sym_sec = bfd_com_section_ptr; |
| 1187 | else |
| 1188 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 1189 | symval = (isym->st_value |
| 1190 | + sym_sec->output_section->vma |
| 1191 | + sym_sec->output_offset); |
| 1192 | } |
| 1193 | else |
| 1194 | { |
| 1195 | unsigned long indx; |
| 1196 | struct elf_link_hash_entry *h; |
| 1197 | |
| 1198 | /* An external symbol. */ |
| 1199 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 1200 | h = elf_sym_hashes (abfd)[indx]; |
| 1201 | BFD_ASSERT (h != NULL); |
| 1202 | |
| 1203 | if (h->root.type != bfd_link_hash_defined |
| 1204 | && h->root.type != bfd_link_hash_defweak) |
| 1205 | /* This appears to be a reference to an undefined |
| 1206 | symbol. Just ignore it--it will be caught by the |
| 1207 | regular reloc processing. */ |
| 1208 | continue; |
| 1209 | |
| 1210 | symval = (h->root.u.def.value |
| 1211 | + h->root.u.def.section->output_section->vma |
| 1212 | + h->root.u.def.section->output_offset); |
| 1213 | } |
| 1214 | |
| 1215 | /* For simplicity of coding, we are going to modify the section |
| 1216 | contents, the section relocs, and the BFD symbol table. We |
| 1217 | must tell the rest of the code not to free up this |
| 1218 | information. It would be possible to instead create a table |
| 1219 | of changes which have to be made, as is done in coff-mips.c; |
| 1220 | that would be more work, but would require less memory when |
| 1221 | the linker is run. */ |
| 1222 | |
| 1223 | /* Try to turn a 24 branch/call into a 16bit relative |
| 1224 | branch/call. */ |
| 1225 | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP24) |
| 1226 | { |
| 1227 | bfd_vma value = symval; |
| 1228 | |
| 1229 | /* Deal with pc-relative gunk. */ |
| 1230 | value -= (sec->output_section->vma + sec->output_offset); |
| 1231 | value -= irel->r_offset; |
| 1232 | value += irel->r_addend; |
| 1233 | |
| 1234 | /* See if the value will fit in 16 bits, note the high value is |
| 1235 | 0xfffe + 2 as the target will be two bytes closer if we are |
| 1236 | able to relax. */ |
| 1237 | if ((long) value < 0x10000 && (long) value > -0x10002) |
| 1238 | { |
| 1239 | unsigned int code; |
| 1240 | |
| 1241 | /* Get the opcode. */ |
| 1242 | code = (unsigned int) bfd_get_32 (abfd, contents + irel->r_offset); |
| 1243 | |
| 1244 | /* Verify it's a 'bcond' and fix the opcode. */ |
| 1245 | if ((code & 0xffff) == 0x0010) |
| 1246 | { |
| 1247 | bfd_put_16 (abfd, 0x1800 | ((0xf & (code >> 20)) << 4), contents + irel->r_offset); |
| 1248 | bfd_put_16 (abfd, value, contents + irel->r_offset + 2); |
| 1249 | } |
| 1250 | else |
| 1251 | continue; |
| 1252 | |
| 1253 | /* Note that we've changed the relocs, section contents, etc. */ |
| 1254 | elf_section_data (sec)->relocs = internal_relocs; |
| 1255 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1256 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1257 | |
| 1258 | /* Fix the relocation's type. */ |
| 1259 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1260 | R_CR16_DISP16); |
| 1261 | |
| 1262 | /* Delete two bytes of data. */ |
| 1263 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
| 1264 | irel->r_offset + 2, 2)) |
| 1265 | goto error_return; |
| 1266 | |
| 1267 | /* That will change things, so, we should relax again. |
| 1268 | Note that this is not required, and it may be slow. */ |
| 1269 | *again = TRUE; |
| 1270 | } |
| 1271 | } |
| 1272 | |
| 1273 | /* Try to turn a 16-bit pc-relative branch into an |
| 1274 | 8-bit pc-relative branch. */ |
| 1275 | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_DISP16) |
| 1276 | { |
| 1277 | bfd_vma value = symval; |
| 1278 | |
| 1279 | /* Deal with pc-relative gunk. */ |
| 1280 | value -= (sec->output_section->vma + sec->output_offset); |
| 1281 | value -= irel->r_offset; |
| 1282 | value += irel->r_addend; |
| 1283 | |
| 1284 | /* See if the value will fit in 8 bits, note the high value is |
| 1285 | 0xfc + 2 as the target will be two bytes closer if we are |
| 1286 | able to relax. */ |
| 1287 | if ((long) value < 0xfe && (long) value > -0x100) |
| 1288 | { |
| 1289 | unsigned short code; |
| 1290 | |
| 1291 | /* Get the opcode. */ |
| 1292 | code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| 1293 | |
| 1294 | /* Verify it's a 'bcond' opcode. */ |
| 1295 | if ((code & 0xff00) == 0x1800) |
| 1296 | { |
| 1297 | bfd_put_8 (abfd, 0x1 | ((0xf & (code >> 4)) << 4), contents + irel->r_offset); |
| 1298 | bfd_put_8 (abfd, value, contents + irel->r_offset + 2); |
| 1299 | } |
| 1300 | else |
| 1301 | continue; |
| 1302 | |
| 1303 | /* Note that we've changed the relocs, section contents, etc. */ |
| 1304 | elf_section_data (sec)->relocs = internal_relocs; |
| 1305 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1306 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1307 | |
| 1308 | /* Fix the relocation's type. */ |
| 1309 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1310 | R_CR16_DISP8); |
| 1311 | |
| 1312 | /* Delete two bytes of data. */ |
| 1313 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
| 1314 | irel->r_offset + 2, 2)) |
| 1315 | goto error_return; |
| 1316 | |
| 1317 | /* That will change things, so, we should relax again. |
| 1318 | Note that this is not required, and it may be slow. */ |
| 1319 | *again = TRUE; |
| 1320 | } |
| 1321 | } |
| 1322 | |
| 1323 | /* Try to turn a 32bit immediate address into |
| 1324 | a 20/16bit immediate address. */ |
| 1325 | if (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM32) |
| 1326 | { |
| 1327 | bfd_vma value = symval; |
| 1328 | unsigned short is_add_mov = 0; |
| 1329 | |
| 1330 | /* See if the value will fit in 20 bits. */ |
| 1331 | if ((long) value < 0xfffff && (long) value > 0) |
| 1332 | { |
| 1333 | unsigned short code; |
| 1334 | |
| 1335 | /* Get the opcode. */ |
| 1336 | code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| 1337 | |
| 1338 | /* Verify it's a arithmetic ADDD or MOVD instruction. |
| 1339 | For ADDD and MOVD only, convert to IMM32 -> IMM20. */ |
| 1340 | if (((code & 0xfff0) == 0x0070) || ((code & 0xfff0) == 0x0020)) |
| 1341 | is_add_mov = 1; |
| 1342 | |
| 1343 | if (is_add_mov) |
| 1344 | { |
| 1345 | /* Note that we've changed the relocs, section contents, |
| 1346 | etc. */ |
| 1347 | elf_section_data (sec)->relocs = internal_relocs; |
| 1348 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1349 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1350 | |
| 1351 | /* Fix the opcode. */ |
| 1352 | if ((code & 0xfff0) == 0x0070) /* For movd. */ |
| 1353 | bfd_put_8 (abfd, 0x05, contents + irel->r_offset + 1); |
| 1354 | else /* code == 0x0020 for addd. */ |
| 1355 | bfd_put_8 (abfd, 0x04, contents + irel->r_offset + 1); |
| 1356 | |
| 1357 | bfd_put_8 (abfd, (code & 0xf) << 4, contents + irel->r_offset); |
| 1358 | |
| 1359 | |
| 1360 | /* Fix the relocation's type. */ |
| 1361 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1362 | R_CR16_IMM20); |
| 1363 | /* Delete two bytes of data. */ |
| 1364 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
| 1365 | irel->r_offset + 2, 2)) |
| 1366 | goto error_return; |
| 1367 | |
| 1368 | /* That will change things, so, we should relax again. |
| 1369 | Note that this is not required, and it may be slow. */ |
| 1370 | *again = TRUE; |
| 1371 | } |
| 1372 | } |
| 1373 | /* See if the value will fit in 16 bits. */ |
| 1374 | if ((!is_add_mov) && ((long) value < 0x7fff && (long) value > 0)) |
| 1375 | { |
| 1376 | unsigned short code; |
| 1377 | |
| 1378 | /* Get the opcode. */ |
| 1379 | code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| 1380 | |
| 1381 | /* Note that we've changed the relocs, section contents, etc. */ |
| 1382 | elf_section_data (sec)->relocs = internal_relocs; |
| 1383 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1384 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1385 | |
| 1386 | /* Fix the opcode. */ |
| 1387 | if ((code & 0xf0) == 0x70) /* For movd. */ |
| 1388 | bfd_put_8 (abfd, 0x54, contents + irel->r_offset + 1); |
| 1389 | else if ((code & 0xf0) == 0x20) /* For addd. */ |
| 1390 | bfd_put_8 (abfd, 0x60, contents + irel->r_offset + 1); |
| 1391 | else if ((code & 0xf0) == 0x90) /* For cmpd. */ |
| 1392 | bfd_put_8 (abfd, 0x56, contents + irel->r_offset + 1); |
| 1393 | else |
| 1394 | continue; |
| 1395 | |
| 1396 | bfd_put_8 (abfd, 0xb0 | (code & 0xf), contents + irel->r_offset); |
| 1397 | |
| 1398 | /* Fix the relocation's type. */ |
| 1399 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1400 | R_CR16_IMM16); |
| 1401 | |
| 1402 | /* Delete two bytes of data. */ |
| 1403 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
| 1404 | irel->r_offset + 2, 2)) |
| 1405 | goto error_return; |
| 1406 | |
| 1407 | /* That will change things, so, we should relax again. |
| 1408 | Note that this is not required, and it may be slow. */ |
| 1409 | *again = TRUE; |
| 1410 | } |
| 1411 | } |
| 1412 | |
| 1413 | /* Try to turn a 20/16bit immediate address into |
| 1414 | a 4bit immediate address. */ |
| 1415 | if ((ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM20) |
| 1416 | || (ELF32_R_TYPE (irel->r_info) == (int) R_CR16_IMM16)) |
| 1417 | { |
| 1418 | bfd_vma value = symval; |
| 1419 | |
| 1420 | /* See if the value will fit in 4 bits. */ |
| 1421 | if ((long) value < 0xf && (long) value > 0) |
| 1422 | { |
| 1423 | unsigned short code; |
| 1424 | |
| 1425 | /* Get the opcode. */ |
| 1426 | code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| 1427 | |
| 1428 | /* Note that we've changed the relocs, section contents, etc. */ |
| 1429 | elf_section_data (sec)->relocs = internal_relocs; |
| 1430 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1431 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1432 | |
| 1433 | /* Fix the opcode. */ |
| 1434 | if (((code & 0x0f00) == 0x0400) || ((code & 0x0f00) == 0x0500)) |
| 1435 | { |
| 1436 | if ((code & 0x0f00) == 0x0400) /* For movd imm20. */ |
| 1437 | bfd_put_8 (abfd, 0x60, contents + irel->r_offset); |
| 1438 | else /* For addd imm20. */ |
| 1439 | bfd_put_8 (abfd, 0x54, contents + irel->r_offset); |
| 1440 | bfd_put_8 (abfd, (code & 0xf0) >> 4, contents + irel->r_offset + 1); |
| 1441 | } |
| 1442 | else |
| 1443 | { |
| 1444 | if ((code & 0xfff0) == 0x56b0) /* For cmpd imm16. */ |
| 1445 | bfd_put_8 (abfd, 0x56, contents + irel->r_offset); |
| 1446 | else if ((code & 0xfff0) == 0x54b0) /* For movd imm16. */ |
| 1447 | bfd_put_8 (abfd, 0x54, contents + irel->r_offset); |
| 1448 | else if ((code & 0xfff0) == 0x58b0) /* For movb imm16. */ |
| 1449 | bfd_put_8 (abfd, 0x58, contents + irel->r_offset); |
| 1450 | else if ((code & 0xfff0) == 0x5Ab0) /* For movw imm16. */ |
| 1451 | bfd_put_8 (abfd, 0x5A, contents + irel->r_offset); |
| 1452 | else if ((code & 0xfff0) == 0x60b0) /* For addd imm16. */ |
| 1453 | bfd_put_8 (abfd, 0x60, contents + irel->r_offset); |
| 1454 | else if ((code & 0xfff0) == 0x30b0) /* For addb imm16. */ |
| 1455 | bfd_put_8 (abfd, 0x30, contents + irel->r_offset); |
| 1456 | else if ((code & 0xfff0) == 0x2Cb0) /* For addub imm16. */ |
| 1457 | bfd_put_8 (abfd, 0x2C, contents + irel->r_offset); |
| 1458 | else if ((code & 0xfff0) == 0x32b0) /* For adduw imm16. */ |
| 1459 | bfd_put_8 (abfd, 0x32, contents + irel->r_offset); |
| 1460 | else if ((code & 0xfff0) == 0x38b0) /* For subb imm16. */ |
| 1461 | bfd_put_8 (abfd, 0x38, contents + irel->r_offset); |
| 1462 | else if ((code & 0xfff0) == 0x3Ab0) /* For subw imm16. */ |
| 1463 | bfd_put_8 (abfd, 0x3A, contents + irel->r_offset); |
| 1464 | else if ((code & 0xfff0) == 0x50b0) /* For cmpb imm16. */ |
| 1465 | bfd_put_8 (abfd, 0x50, contents + irel->r_offset); |
| 1466 | else if ((code & 0xfff0) == 0x52b0) /* For cmpw imm16. */ |
| 1467 | bfd_put_8 (abfd, 0x52, contents + irel->r_offset); |
| 1468 | else |
| 1469 | continue; |
| 1470 | |
| 1471 | bfd_put_8 (abfd, (code & 0xf), contents + irel->r_offset + 1); |
| 1472 | } |
| 1473 | |
| 1474 | /* Fix the relocation's type. */ |
| 1475 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 1476 | R_CR16_IMM4); |
| 1477 | |
| 1478 | /* Delete two bytes of data. */ |
| 1479 | if (!elf32_cr16_relax_delete_bytes (link_info, abfd, sec, |
| 1480 | irel->r_offset + 2, 2)) |
| 1481 | goto error_return; |
| 1482 | |
| 1483 | /* That will change things, so, we should relax again. |
| 1484 | Note that this is not required, and it may be slow. */ |
| 1485 | *again = TRUE; |
| 1486 | } |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | if (isymbuf != NULL |
| 1491 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1492 | { |
| 1493 | if (! link_info->keep_memory) |
| 1494 | free (isymbuf); |
| 1495 | else |
| 1496 | /* Cache the symbols for elf_link_input_bfd. */ |
| 1497 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 1498 | } |
| 1499 | |
| 1500 | if (contents != NULL |
| 1501 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 1502 | { |
| 1503 | if (! link_info->keep_memory) |
| 1504 | free (contents); |
| 1505 | else |
| 1506 | /* Cache the section contents for elf_link_input_bfd. */ |
| 1507 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1508 | } |
| 1509 | |
| 1510 | if (internal_relocs != NULL |
| 1511 | && elf_section_data (sec)->relocs != internal_relocs) |
| 1512 | free (internal_relocs); |
| 1513 | |
| 1514 | return TRUE; |
| 1515 | |
| 1516 | error_return: |
| 1517 | if (isymbuf != NULL |
| 1518 | && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 1519 | free (isymbuf); |
| 1520 | if (contents != NULL |
| 1521 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 1522 | free (contents); |
| 1523 | if (internal_relocs != NULL |
| 1524 | && elf_section_data (sec)->relocs != internal_relocs) |
| 1525 | free (internal_relocs); |
| 1526 | |
| 1527 | return FALSE; |
| 1528 | } |
| 1529 | |
| 1530 | static asection * |
| 1531 | elf32_cr16_gc_mark_hook (asection *sec, |
| 1532 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 1533 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, |
| 1534 | struct elf_link_hash_entry *h, |
| 1535 | Elf_Internal_Sym *sym) |
| 1536 | { |
| 1537 | if (h == NULL) |
| 1538 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| 1539 | |
| 1540 | switch (h->root.type) |
| 1541 | { |
| 1542 | case bfd_link_hash_defined: |
| 1543 | case bfd_link_hash_defweak: |
| 1544 | return h->root.u.def.section; |
| 1545 | |
| 1546 | case bfd_link_hash_common: |
| 1547 | return h->root.u.c.p->section; |
| 1548 | |
| 1549 | default: |
| 1550 | return NULL; |
| 1551 | } |
| 1552 | } |
| 1553 | |
| 1554 | /* Update the got entry reference counts for the section being removed. */ |
| 1555 | |
| 1556 | static bfd_boolean |
| 1557 | elf32_cr16_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, |
| 1558 | struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 1559 | asection *sec ATTRIBUTE_UNUSED, |
| 1560 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) |
| 1561 | { |
| 1562 | /* We don't support garbage collection of GOT and PLT relocs yet. */ |
| 1563 | return TRUE; |
| 1564 | } |
| 1565 | |
| 1566 | /* Definitions for setting CR16 target vector. */ |
| 1567 | #define TARGET_LITTLE_SYM bfd_elf32_cr16_vec |
| 1568 | #define TARGET_LITTLE_NAME "elf32-cr16" |
| 1569 | #define ELF_ARCH bfd_arch_cr16 |
| 1570 | #define ELF_MACHINE_CODE EM_CR16 |
| 1571 | #define ELF_MAXPAGESIZE 0x1 |
| 1572 | #define elf_symbol_leading_char '_' |
| 1573 | |
| 1574 | #define bfd_elf32_bfd_reloc_type_lookup elf_cr16_reloc_type_lookup |
| 1575 | #define bfd_elf32_bfd_reloc_name_lookup elf_cr16_reloc_name_lookup |
| 1576 | #define elf_info_to_howto elf_cr16_info_to_howto |
| 1577 | #define elf_info_to_howto_rel 0 |
| 1578 | #define elf_backend_relocate_section elf32_cr16_relocate_section |
| 1579 | #define bfd_elf32_bfd_relax_section elf32_cr16_relax_section |
| 1580 | #define bfd_elf32_bfd_get_relocated_section_contents \ |
| 1581 | elf32_cr16_get_relocated_section_contents |
| 1582 | #define elf_backend_gc_mark_hook elf32_cr16_gc_mark_hook |
| 1583 | #define elf_backend_gc_sweep_hook elf32_cr16_gc_sweep_hook |
| 1584 | #define elf_backend_can_gc_sections 1 |
| 1585 | #define elf_backend_rela_normal 1 |
| 1586 | |
| 1587 | #include "elf32-target.h" |