| 1 | /* MSP430-specific support for 32-bit ELF |
| 2 | Copyright (C) 2002-2021 Free Software Foundation, Inc. |
| 3 | Contributed by Dmitry Diky <diwil@mail.ru> |
| 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 "libiberty.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "elf-bfd.h" |
| 27 | #include "elf/msp430.h" |
| 28 | |
| 29 | static bool debug_relocs = 0; |
| 30 | |
| 31 | /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */ |
| 32 | #define OCTETS_PER_BYTE(ABFD, SEC) 1 |
| 33 | |
| 34 | static bfd_reloc_status_type |
| 35 | rl78_sym_diff_handler (bfd * abfd, |
| 36 | arelent * reloc, |
| 37 | asymbol * sym ATTRIBUTE_UNUSED, |
| 38 | void * addr ATTRIBUTE_UNUSED, |
| 39 | asection * input_sec, |
| 40 | bfd * out_bfd ATTRIBUTE_UNUSED, |
| 41 | char ** error_message ATTRIBUTE_UNUSED) |
| 42 | { |
| 43 | bfd_size_type octets; |
| 44 | octets = reloc->address * OCTETS_PER_BYTE (abfd, input_sec); |
| 45 | |
| 46 | /* Catch the case where bfd_install_relocation would return |
| 47 | bfd_reloc_outofrange because the SYM_DIFF reloc is being used in a very |
| 48 | small section. It does not actually matter if this happens because all |
| 49 | that SYM_DIFF does is compute a (4-byte) value. A second reloc then uses |
| 50 | this value, and it is that reloc that must fit into the section. |
| 51 | |
| 52 | This happens in eg, gcc/testsuite/gcc.c-torture/compile/labels-3.c. */ |
| 53 | if ((octets + bfd_get_reloc_size (reloc->howto)) |
| 54 | > bfd_get_section_limit_octets (abfd, input_sec)) |
| 55 | return bfd_reloc_ok; |
| 56 | return bfd_reloc_continue; |
| 57 | } |
| 58 | |
| 59 | /* Special handler for relocations which don't have to be relocated. |
| 60 | This function just simply returns bfd_reloc_ok. */ |
| 61 | static bfd_reloc_status_type |
| 62 | msp430_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry, |
| 63 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 64 | void *data ATTRIBUTE_UNUSED, asection *input_section, |
| 65 | bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED) |
| 66 | { |
| 67 | if (output_bfd != NULL) |
| 68 | reloc_entry->address += input_section->output_offset; |
| 69 | |
| 70 | return bfd_reloc_ok; |
| 71 | } |
| 72 | |
| 73 | static reloc_howto_type elf_msp430_howto_table[] = |
| 74 | { |
| 75 | HOWTO (R_MSP430_NONE, /* type */ |
| 76 | 0, /* rightshift */ |
| 77 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 78 | 0, /* bitsize */ |
| 79 | false, /* pc_relative */ |
| 80 | 0, /* bitpos */ |
| 81 | complain_overflow_dont,/* complain_on_overflow */ |
| 82 | bfd_elf_generic_reloc, /* special_function */ |
| 83 | "R_MSP430_NONE", /* name */ |
| 84 | false, /* partial_inplace */ |
| 85 | 0, /* src_mask */ |
| 86 | 0, /* dst_mask */ |
| 87 | false), /* pcrel_offset */ |
| 88 | |
| 89 | HOWTO (R_MSP430_32, /* type */ |
| 90 | 0, /* rightshift */ |
| 91 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 92 | 32, /* bitsize */ |
| 93 | false, /* pc_relative */ |
| 94 | 0, /* bitpos */ |
| 95 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 96 | bfd_elf_generic_reloc, /* special_function */ |
| 97 | "R_MSP430_32", /* name */ |
| 98 | false, /* partial_inplace */ |
| 99 | 0xffffffff, /* src_mask */ |
| 100 | 0xffffffff, /* dst_mask */ |
| 101 | false), /* pcrel_offset */ |
| 102 | |
| 103 | /* A 10 bit PC relative relocation. */ |
| 104 | HOWTO (R_MSP430_10_PCREL, /* type */ |
| 105 | 1, /* rightshift */ |
| 106 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 107 | 10, /* bitsize */ |
| 108 | true, /* pc_relative */ |
| 109 | 0, /* bitpos */ |
| 110 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 111 | bfd_elf_generic_reloc, /* special_function */ |
| 112 | "R_MSP430_10_PCREL", /* name */ |
| 113 | false, /* partial_inplace */ |
| 114 | 0x3ff, /* src_mask */ |
| 115 | 0x3ff, /* dst_mask */ |
| 116 | true), /* pcrel_offset */ |
| 117 | |
| 118 | /* A 16 bit absolute relocation. */ |
| 119 | HOWTO (R_MSP430_16, /* type */ |
| 120 | 0, /* rightshift */ |
| 121 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 122 | 16, /* bitsize */ |
| 123 | false, /* pc_relative */ |
| 124 | 0, /* bitpos */ |
| 125 | complain_overflow_dont,/* complain_on_overflow */ |
| 126 | bfd_elf_generic_reloc, /* special_function */ |
| 127 | "R_MSP430_16", /* name */ |
| 128 | false, /* partial_inplace */ |
| 129 | 0, /* src_mask */ |
| 130 | 0xffff, /* dst_mask */ |
| 131 | false), /* pcrel_offset */ |
| 132 | |
| 133 | /* A 16 bit PC relative relocation for command address. */ |
| 134 | HOWTO (R_MSP430_16_PCREL, /* type */ |
| 135 | 1, /* rightshift */ |
| 136 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 137 | 16, /* bitsize */ |
| 138 | true, /* pc_relative */ |
| 139 | 0, /* bitpos */ |
| 140 | complain_overflow_dont,/* complain_on_overflow */ |
| 141 | bfd_elf_generic_reloc, /* special_function */ |
| 142 | "R_MSP430_16_PCREL", /* name */ |
| 143 | false, /* partial_inplace */ |
| 144 | 0, /* src_mask */ |
| 145 | 0xffff, /* dst_mask */ |
| 146 | true), /* pcrel_offset */ |
| 147 | |
| 148 | /* A 16 bit absolute relocation, byte operations. */ |
| 149 | HOWTO (R_MSP430_16_BYTE, /* type */ |
| 150 | 0, /* rightshift */ |
| 151 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 152 | 16, /* bitsize */ |
| 153 | false, /* pc_relative */ |
| 154 | 0, /* bitpos */ |
| 155 | complain_overflow_dont,/* complain_on_overflow */ |
| 156 | bfd_elf_generic_reloc, /* special_function */ |
| 157 | "R_MSP430_16_BYTE", /* name */ |
| 158 | false, /* partial_inplace */ |
| 159 | 0xffff, /* src_mask */ |
| 160 | 0xffff, /* dst_mask */ |
| 161 | false), /* pcrel_offset */ |
| 162 | |
| 163 | /* A 16 bit absolute relocation for command address. */ |
| 164 | HOWTO (R_MSP430_16_PCREL_BYTE,/* type */ |
| 165 | 1, /* rightshift */ |
| 166 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 167 | 16, /* bitsize */ |
| 168 | true, /* pc_relative */ |
| 169 | 0, /* bitpos */ |
| 170 | complain_overflow_dont,/* complain_on_overflow */ |
| 171 | bfd_elf_generic_reloc, /* special_function */ |
| 172 | "R_MSP430_16_PCREL_BYTE",/* name */ |
| 173 | false, /* partial_inplace */ |
| 174 | 0xffff, /* src_mask */ |
| 175 | 0xffff, /* dst_mask */ |
| 176 | true), /* pcrel_offset */ |
| 177 | |
| 178 | /* A 10 bit PC relative relocation for complicated polymorphs. */ |
| 179 | HOWTO (R_MSP430_2X_PCREL, /* type */ |
| 180 | 1, /* rightshift */ |
| 181 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 182 | 10, /* bitsize */ |
| 183 | true, /* pc_relative */ |
| 184 | 0, /* bitpos */ |
| 185 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 186 | bfd_elf_generic_reloc, /* special_function */ |
| 187 | "R_MSP430_2X_PCREL", /* name */ |
| 188 | false, /* partial_inplace */ |
| 189 | 0x3ff, /* src_mask */ |
| 190 | 0x3ff, /* dst_mask */ |
| 191 | true), /* pcrel_offset */ |
| 192 | |
| 193 | /* A 16 bit relaxable relocation for command address. */ |
| 194 | HOWTO (R_MSP430_RL_PCREL, /* type */ |
| 195 | 1, /* rightshift */ |
| 196 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 197 | 16, /* bitsize */ |
| 198 | true, /* pc_relative */ |
| 199 | 0, /* bitpos */ |
| 200 | complain_overflow_dont,/* complain_on_overflow */ |
| 201 | bfd_elf_generic_reloc, /* special_function */ |
| 202 | "R_MSP430_RL_PCREL", /* name */ |
| 203 | false, /* partial_inplace */ |
| 204 | 0, /* src_mask */ |
| 205 | 0xffff, /* dst_mask */ |
| 206 | true) /* pcrel_offset */ |
| 207 | |
| 208 | /* A 8-bit absolute relocation. */ |
| 209 | , HOWTO (R_MSP430_8, /* type */ |
| 210 | 0, /* rightshift */ |
| 211 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 212 | 8, /* bitsize */ |
| 213 | false, /* pc_relative */ |
| 214 | 0, /* bitpos */ |
| 215 | complain_overflow_dont,/* complain_on_overflow */ |
| 216 | bfd_elf_generic_reloc, /* special_function */ |
| 217 | "R_MSP430_8", /* name */ |
| 218 | false, /* partial_inplace */ |
| 219 | 0, /* src_mask */ |
| 220 | 0xffff, /* dst_mask */ |
| 221 | false), /* pcrel_offset */ |
| 222 | |
| 223 | /* Together with a following reloc, allows for the difference |
| 224 | between two symbols to be the real addend of the second reloc. */ |
| 225 | HOWTO (R_MSP430_SYM_DIFF, /* type */ |
| 226 | 0, /* rightshift */ |
| 227 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 228 | 32, /* bitsize */ |
| 229 | false, /* pc_relative */ |
| 230 | 0, /* bitpos */ |
| 231 | complain_overflow_dont,/* complain_on_overflow */ |
| 232 | rl78_sym_diff_handler, /* special handler. */ |
| 233 | "R_MSP430_SYM_DIFF", /* name */ |
| 234 | false, /* partial_inplace */ |
| 235 | 0xffffffff, /* src_mask */ |
| 236 | 0xffffffff, /* dst_mask */ |
| 237 | false), /* pcrel_offset */ |
| 238 | |
| 239 | /* The length of unsigned-leb128 is variable, just assume the |
| 240 | size is one byte here. */ |
| 241 | HOWTO (R_MSP430_GNU_SET_ULEB128, /* type */ |
| 242 | 0, /* rightshift */ |
| 243 | 0, /* size */ |
| 244 | 0, /* bitsize */ |
| 245 | false, /* pc_relative */ |
| 246 | 0, /* bitpos */ |
| 247 | complain_overflow_dont, /* complain_on_overflow */ |
| 248 | msp430_elf_ignore_reloc, /* special handler. */ |
| 249 | "R_MSP430_GNU_SET_ULEB128", /* name */ |
| 250 | false, /* partial_inplace */ |
| 251 | 0, /* src_mask */ |
| 252 | 0, /* dst_mask */ |
| 253 | false), /* pcrel_offset */ |
| 254 | |
| 255 | /* The length of unsigned-leb128 is variable, just assume the |
| 256 | size is one byte here. */ |
| 257 | HOWTO (R_MSP430_GNU_SUB_ULEB128, /* type */ |
| 258 | 0, /* rightshift */ |
| 259 | 0, /* size */ |
| 260 | 0, /* bitsize */ |
| 261 | false, /* pc_relative */ |
| 262 | 0, /* bitpos */ |
| 263 | complain_overflow_dont, /* complain_on_overflow */ |
| 264 | msp430_elf_ignore_reloc, /* special handler. */ |
| 265 | "R_MSP430_GNU_SUB_ULEB128", /* name */ |
| 266 | false, /* partial_inplace */ |
| 267 | 0, /* src_mask */ |
| 268 | 0, /* dst_mask */ |
| 269 | false), /* pcrel_offset */ |
| 270 | |
| 271 | }; |
| 272 | |
| 273 | static reloc_howto_type elf_msp430x_howto_table[] = |
| 274 | { |
| 275 | HOWTO (R_MSP430_NONE, /* type */ |
| 276 | 0, /* rightshift */ |
| 277 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 278 | 0, /* bitsize */ |
| 279 | false, /* pc_relative */ |
| 280 | 0, /* bitpos */ |
| 281 | complain_overflow_dont,/* complain_on_overflow */ |
| 282 | bfd_elf_generic_reloc, /* special_function */ |
| 283 | "R_MSP430_NONE", /* name */ |
| 284 | false, /* partial_inplace */ |
| 285 | 0, /* src_mask */ |
| 286 | 0, /* dst_mask */ |
| 287 | false), /* pcrel_offset */ |
| 288 | |
| 289 | HOWTO (R_MSP430_ABS32, /* type */ |
| 290 | 0, /* rightshift */ |
| 291 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 292 | 32, /* bitsize */ |
| 293 | false, /* pc_relative */ |
| 294 | 0, /* bitpos */ |
| 295 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 296 | bfd_elf_generic_reloc, /* special_function */ |
| 297 | "R_MSP430_ABS32", /* name */ |
| 298 | false, /* partial_inplace */ |
| 299 | 0xffffffff, /* src_mask */ |
| 300 | 0xffffffff, /* dst_mask */ |
| 301 | false), /* pcrel_offset */ |
| 302 | |
| 303 | HOWTO (R_MSP430_ABS16, /* type */ |
| 304 | 0, /* rightshift */ |
| 305 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 306 | 16, /* bitsize */ |
| 307 | false, /* pc_relative */ |
| 308 | 0, /* bitpos */ |
| 309 | complain_overflow_dont,/* complain_on_overflow */ |
| 310 | bfd_elf_generic_reloc, /* special_function */ |
| 311 | "R_MSP430_ABS16", /* name */ |
| 312 | false, /* partial_inplace */ |
| 313 | 0, /* src_mask */ |
| 314 | 0xffff, /* dst_mask */ |
| 315 | false), /* pcrel_offset */ |
| 316 | |
| 317 | HOWTO (R_MSP430_ABS8, /* type */ |
| 318 | 0, /* rightshift */ |
| 319 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 320 | 8, /* bitsize */ |
| 321 | false, /* pc_relative */ |
| 322 | 0, /* bitpos */ |
| 323 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 324 | bfd_elf_generic_reloc, /* special_function */ |
| 325 | "R_MSP430_ABS8", /* name */ |
| 326 | false, /* partial_inplace */ |
| 327 | 0xff, /* src_mask */ |
| 328 | 0xff, /* dst_mask */ |
| 329 | false), /* pcrel_offset */ |
| 330 | |
| 331 | HOWTO (R_MSP430_PCR16, /* type */ |
| 332 | 1, /* rightshift */ |
| 333 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 334 | 16, /* bitsize */ |
| 335 | true, /* pc_relative */ |
| 336 | 0, /* bitpos */ |
| 337 | complain_overflow_dont,/* complain_on_overflow */ |
| 338 | bfd_elf_generic_reloc, /* special_function */ |
| 339 | "R_MSP430_PCR16", /* name */ |
| 340 | false, /* partial_inplace */ |
| 341 | 0, /* src_mask */ |
| 342 | 0xffff, /* dst_mask */ |
| 343 | true), /* pcrel_offset */ |
| 344 | |
| 345 | HOWTO (R_MSP430X_PCR20_EXT_SRC,/* type */ |
| 346 | 0, /* rightshift */ |
| 347 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 348 | 32, /* bitsize */ |
| 349 | true, /* pc_relative */ |
| 350 | 0, /* bitpos */ |
| 351 | complain_overflow_dont,/* complain_on_overflow */ |
| 352 | bfd_elf_generic_reloc, /* special_function */ |
| 353 | "R_MSP430X_PCR20_EXT_SRC",/* name */ |
| 354 | false, /* partial_inplace */ |
| 355 | 0, /* src_mask */ |
| 356 | 0xffff, /* dst_mask */ |
| 357 | true), /* pcrel_offset */ |
| 358 | |
| 359 | HOWTO (R_MSP430X_PCR20_EXT_DST,/* type */ |
| 360 | 0, /* rightshift */ |
| 361 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 362 | 32, /* bitsize */ |
| 363 | true, /* pc_relative */ |
| 364 | 0, /* bitpos */ |
| 365 | complain_overflow_dont,/* complain_on_overflow */ |
| 366 | bfd_elf_generic_reloc, /* special_function */ |
| 367 | "R_MSP430X_PCR20_EXT_DST",/* name */ |
| 368 | false, /* partial_inplace */ |
| 369 | 0, /* src_mask */ |
| 370 | 0xffff, /* dst_mask */ |
| 371 | true), /* pcrel_offset */ |
| 372 | |
| 373 | HOWTO (R_MSP430X_PCR20_EXT_ODST,/* type */ |
| 374 | 0, /* rightshift */ |
| 375 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 376 | 32, /* bitsize */ |
| 377 | true, /* pc_relative */ |
| 378 | 0, /* bitpos */ |
| 379 | complain_overflow_dont,/* complain_on_overflow */ |
| 380 | bfd_elf_generic_reloc, /* special_function */ |
| 381 | "R_MSP430X_PCR20_EXT_ODST",/* name */ |
| 382 | false, /* partial_inplace */ |
| 383 | 0, /* src_mask */ |
| 384 | 0xffff, /* dst_mask */ |
| 385 | true), /* pcrel_offset */ |
| 386 | |
| 387 | HOWTO (R_MSP430X_ABS20_EXT_SRC,/* type */ |
| 388 | 0, /* rightshift */ |
| 389 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 390 | 32, /* bitsize */ |
| 391 | true, /* pc_relative */ |
| 392 | 0, /* bitpos */ |
| 393 | complain_overflow_dont,/* complain_on_overflow */ |
| 394 | bfd_elf_generic_reloc, /* special_function */ |
| 395 | "R_MSP430X_ABS20_EXT_SRC",/* name */ |
| 396 | false, /* partial_inplace */ |
| 397 | 0, /* src_mask */ |
| 398 | 0xffff, /* dst_mask */ |
| 399 | true), /* pcrel_offset */ |
| 400 | |
| 401 | HOWTO (R_MSP430X_ABS20_EXT_DST,/* type */ |
| 402 | 0, /* rightshift */ |
| 403 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 404 | 32, /* bitsize */ |
| 405 | true, /* pc_relative */ |
| 406 | 0, /* bitpos */ |
| 407 | complain_overflow_dont,/* complain_on_overflow */ |
| 408 | bfd_elf_generic_reloc, /* special_function */ |
| 409 | "R_MSP430X_ABS20_EXT_DST",/* name */ |
| 410 | false, /* partial_inplace */ |
| 411 | 0, /* src_mask */ |
| 412 | 0xffff, /* dst_mask */ |
| 413 | true), /* pcrel_offset */ |
| 414 | |
| 415 | HOWTO (R_MSP430X_ABS20_EXT_ODST,/* type */ |
| 416 | 0, /* rightshift */ |
| 417 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 418 | 32, /* bitsize */ |
| 419 | true, /* pc_relative */ |
| 420 | 0, /* bitpos */ |
| 421 | complain_overflow_dont,/* complain_on_overflow */ |
| 422 | bfd_elf_generic_reloc, /* special_function */ |
| 423 | "R_MSP430X_ABS20_EXT_ODST",/* name */ |
| 424 | false, /* partial_inplace */ |
| 425 | 0, /* src_mask */ |
| 426 | 0xffff, /* dst_mask */ |
| 427 | true), /* pcrel_offset */ |
| 428 | |
| 429 | HOWTO (R_MSP430X_ABS20_ADR_SRC,/* type */ |
| 430 | 0, /* rightshift */ |
| 431 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 432 | 32, /* bitsize */ |
| 433 | true, /* pc_relative */ |
| 434 | 0, /* bitpos */ |
| 435 | complain_overflow_dont,/* complain_on_overflow */ |
| 436 | bfd_elf_generic_reloc, /* special_function */ |
| 437 | "R_MSP430X_ABS20_ADR_SRC",/* name */ |
| 438 | false, /* partial_inplace */ |
| 439 | 0, /* src_mask */ |
| 440 | 0xffff, /* dst_mask */ |
| 441 | true), /* pcrel_offset */ |
| 442 | |
| 443 | HOWTO (R_MSP430X_ABS20_ADR_DST,/* type */ |
| 444 | 0, /* rightshift */ |
| 445 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 446 | 32, /* bitsize */ |
| 447 | true, /* pc_relative */ |
| 448 | 0, /* bitpos */ |
| 449 | complain_overflow_dont,/* complain_on_overflow */ |
| 450 | bfd_elf_generic_reloc, /* special_function */ |
| 451 | "R_MSP430X_ABS20_ADR_DST",/* name */ |
| 452 | false, /* partial_inplace */ |
| 453 | 0, /* src_mask */ |
| 454 | 0xffff, /* dst_mask */ |
| 455 | true), /* pcrel_offset */ |
| 456 | |
| 457 | HOWTO (R_MSP430X_PCR16, /* type */ |
| 458 | 0, /* rightshift */ |
| 459 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 460 | 32, /* bitsize */ |
| 461 | true, /* pc_relative */ |
| 462 | 0, /* bitpos */ |
| 463 | complain_overflow_dont,/* complain_on_overflow */ |
| 464 | bfd_elf_generic_reloc, /* special_function */ |
| 465 | "R_MSP430X_PCR16", /* name */ |
| 466 | false, /* partial_inplace */ |
| 467 | 0, /* src_mask */ |
| 468 | 0xffff, /* dst_mask */ |
| 469 | true), /* pcrel_offset */ |
| 470 | |
| 471 | HOWTO (R_MSP430X_PCR20_CALL, /* type */ |
| 472 | 0, /* rightshift */ |
| 473 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 474 | 32, /* bitsize */ |
| 475 | true, /* pc_relative */ |
| 476 | 0, /* bitpos */ |
| 477 | complain_overflow_dont,/* complain_on_overflow */ |
| 478 | bfd_elf_generic_reloc, /* special_function */ |
| 479 | "R_MSP430X_PCR20_CALL",/* name */ |
| 480 | false, /* partial_inplace */ |
| 481 | 0, /* src_mask */ |
| 482 | 0xffff, /* dst_mask */ |
| 483 | true), /* pcrel_offset */ |
| 484 | |
| 485 | HOWTO (R_MSP430X_ABS16, /* type */ |
| 486 | 0, /* rightshift */ |
| 487 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 488 | 32, /* bitsize */ |
| 489 | true, /* pc_relative */ |
| 490 | 0, /* bitpos */ |
| 491 | complain_overflow_dont,/* complain_on_overflow */ |
| 492 | bfd_elf_generic_reloc, /* special_function */ |
| 493 | "R_MSP430X_ABS16", /* name */ |
| 494 | false, /* partial_inplace */ |
| 495 | 0, /* src_mask */ |
| 496 | 0xffff, /* dst_mask */ |
| 497 | true), /* pcrel_offset */ |
| 498 | |
| 499 | HOWTO (R_MSP430_ABS_HI16, /* type */ |
| 500 | 0, /* rightshift */ |
| 501 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 502 | 32, /* bitsize */ |
| 503 | true, /* pc_relative */ |
| 504 | 0, /* bitpos */ |
| 505 | complain_overflow_dont,/* complain_on_overflow */ |
| 506 | bfd_elf_generic_reloc, /* special_function */ |
| 507 | "R_MSP430_ABS_HI16", /* name */ |
| 508 | false, /* partial_inplace */ |
| 509 | 0, /* src_mask */ |
| 510 | 0xffff, /* dst_mask */ |
| 511 | true), /* pcrel_offset */ |
| 512 | |
| 513 | HOWTO (R_MSP430_PREL31, /* type */ |
| 514 | 0, /* rightshift */ |
| 515 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 516 | 32, /* bitsize */ |
| 517 | true, /* pc_relative */ |
| 518 | 0, /* bitpos */ |
| 519 | complain_overflow_dont,/* complain_on_overflow */ |
| 520 | bfd_elf_generic_reloc, /* special_function */ |
| 521 | "R_MSP430_PREL31", /* name */ |
| 522 | false, /* partial_inplace */ |
| 523 | 0, /* src_mask */ |
| 524 | 0xffff, /* dst_mask */ |
| 525 | true), /* pcrel_offset */ |
| 526 | |
| 527 | EMPTY_HOWTO (R_MSP430_EHTYPE), |
| 528 | |
| 529 | /* A 10 bit PC relative relocation. */ |
| 530 | HOWTO (R_MSP430X_10_PCREL, /* type */ |
| 531 | 1, /* rightshift */ |
| 532 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 533 | 10, /* bitsize */ |
| 534 | true, /* pc_relative */ |
| 535 | 0, /* bitpos */ |
| 536 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 537 | bfd_elf_generic_reloc, /* special_function */ |
| 538 | "R_MSP430X_10_PCREL", /* name */ |
| 539 | false, /* partial_inplace */ |
| 540 | 0x3ff, /* src_mask */ |
| 541 | 0x3ff, /* dst_mask */ |
| 542 | true), /* pcrel_offset */ |
| 543 | |
| 544 | /* A 10 bit PC relative relocation for complicated polymorphs. */ |
| 545 | HOWTO (R_MSP430X_2X_PCREL, /* type */ |
| 546 | 1, /* rightshift */ |
| 547 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 548 | 10, /* bitsize */ |
| 549 | true, /* pc_relative */ |
| 550 | 0, /* bitpos */ |
| 551 | complain_overflow_bitfield,/* complain_on_overflow */ |
| 552 | bfd_elf_generic_reloc, /* special_function */ |
| 553 | "R_MSP430X_2X_PCREL", /* name */ |
| 554 | false, /* partial_inplace */ |
| 555 | 0x3ff, /* src_mask */ |
| 556 | 0x3ff, /* dst_mask */ |
| 557 | true), /* pcrel_offset */ |
| 558 | |
| 559 | /* Together with a following reloc, allows for the difference |
| 560 | between two symbols to be the real addend of the second reloc. */ |
| 561 | HOWTO (R_MSP430X_SYM_DIFF, /* type */ |
| 562 | 0, /* rightshift */ |
| 563 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 564 | 32, /* bitsize */ |
| 565 | false, /* pc_relative */ |
| 566 | 0, /* bitpos */ |
| 567 | complain_overflow_dont,/* complain_on_overflow */ |
| 568 | rl78_sym_diff_handler, /* special handler. */ |
| 569 | "R_MSP430X_SYM_DIFF", /* name */ |
| 570 | false, /* partial_inplace */ |
| 571 | 0xffffffff, /* src_mask */ |
| 572 | 0xffffffff, /* dst_mask */ |
| 573 | false), /* pcrel_offset */ |
| 574 | |
| 575 | /* The length of unsigned-leb128 is variable, just assume the |
| 576 | size is one byte here. */ |
| 577 | HOWTO (R_MSP430X_GNU_SET_ULEB128, /* type */ |
| 578 | 0, /* rightshift */ |
| 579 | 0, /* size */ |
| 580 | 0, /* bitsize */ |
| 581 | false, /* pc_relative */ |
| 582 | 0, /* bitpos */ |
| 583 | complain_overflow_dont, /* complain_on_overflow */ |
| 584 | msp430_elf_ignore_reloc, /* special handler. */ |
| 585 | "R_MSP430X_GNU_SET_ULEB128", /* name */ |
| 586 | false, /* partial_inplace */ |
| 587 | 0, /* src_mask */ |
| 588 | 0, /* dst_mask */ |
| 589 | false), /* pcrel_offset */ |
| 590 | |
| 591 | /* The length of unsigned-leb128 is variable, just assume the |
| 592 | size is one byte here. */ |
| 593 | HOWTO (R_MSP430X_GNU_SUB_ULEB128, /* type */ |
| 594 | 0, /* rightshift */ |
| 595 | 0, /* size */ |
| 596 | 0, /* bitsize */ |
| 597 | false, /* pc_relative */ |
| 598 | 0, /* bitpos */ |
| 599 | complain_overflow_dont, /* complain_on_overflow */ |
| 600 | msp430_elf_ignore_reloc, /* special handler. */ |
| 601 | "R_MSP430X_GNU_SUB_ULEB128", /* name */ |
| 602 | false, /* partial_inplace */ |
| 603 | 0, /* src_mask */ |
| 604 | 0, /* dst_mask */ |
| 605 | false), /* pcrel_offset */ |
| 606 | |
| 607 | }; |
| 608 | |
| 609 | /* Map BFD reloc types to MSP430 ELF reloc types. */ |
| 610 | |
| 611 | struct msp430_reloc_map |
| 612 | { |
| 613 | bfd_reloc_code_real_type bfd_reloc_val; |
| 614 | unsigned int elf_reloc_val; |
| 615 | }; |
| 616 | |
| 617 | static const struct msp430_reloc_map msp430_reloc_map[] = |
| 618 | { |
| 619 | {BFD_RELOC_NONE, R_MSP430_NONE}, |
| 620 | {BFD_RELOC_32, R_MSP430_32}, |
| 621 | {BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL}, |
| 622 | {BFD_RELOC_16, R_MSP430_16_BYTE}, |
| 623 | {BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL}, |
| 624 | {BFD_RELOC_MSP430_16, R_MSP430_16}, |
| 625 | {BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE}, |
| 626 | {BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE}, |
| 627 | {BFD_RELOC_MSP430_2X_PCREL, R_MSP430_2X_PCREL}, |
| 628 | {BFD_RELOC_MSP430_RL_PCREL, R_MSP430_RL_PCREL}, |
| 629 | {BFD_RELOC_8, R_MSP430_8}, |
| 630 | {BFD_RELOC_MSP430_SYM_DIFF, R_MSP430_SYM_DIFF}, |
| 631 | {BFD_RELOC_MSP430_SET_ULEB128, R_MSP430_GNU_SET_ULEB128 }, |
| 632 | {BFD_RELOC_MSP430_SUB_ULEB128, R_MSP430_GNU_SUB_ULEB128 } |
| 633 | }; |
| 634 | |
| 635 | static const struct msp430_reloc_map msp430x_reloc_map[] = |
| 636 | { |
| 637 | {BFD_RELOC_NONE, R_MSP430_NONE}, |
| 638 | {BFD_RELOC_32, R_MSP430_ABS32}, |
| 639 | {BFD_RELOC_16, R_MSP430_ABS16}, |
| 640 | {BFD_RELOC_8, R_MSP430_ABS8}, |
| 641 | {BFD_RELOC_MSP430_ABS8, R_MSP430_ABS8}, |
| 642 | {BFD_RELOC_MSP430X_PCR20_EXT_SRC, R_MSP430X_PCR20_EXT_SRC}, |
| 643 | {BFD_RELOC_MSP430X_PCR20_EXT_DST, R_MSP430X_PCR20_EXT_DST}, |
| 644 | {BFD_RELOC_MSP430X_PCR20_EXT_ODST, R_MSP430X_PCR20_EXT_ODST}, |
| 645 | {BFD_RELOC_MSP430X_ABS20_EXT_SRC, R_MSP430X_ABS20_EXT_SRC}, |
| 646 | {BFD_RELOC_MSP430X_ABS20_EXT_DST, R_MSP430X_ABS20_EXT_DST}, |
| 647 | {BFD_RELOC_MSP430X_ABS20_EXT_ODST, R_MSP430X_ABS20_EXT_ODST}, |
| 648 | {BFD_RELOC_MSP430X_ABS20_ADR_SRC, R_MSP430X_ABS20_ADR_SRC}, |
| 649 | {BFD_RELOC_MSP430X_ABS20_ADR_DST, R_MSP430X_ABS20_ADR_DST}, |
| 650 | {BFD_RELOC_MSP430X_PCR16, R_MSP430X_PCR16}, |
| 651 | {BFD_RELOC_MSP430X_PCR20_CALL, R_MSP430X_PCR20_CALL}, |
| 652 | {BFD_RELOC_MSP430X_ABS16, R_MSP430X_ABS16}, |
| 653 | {BFD_RELOC_MSP430_ABS_HI16, R_MSP430_ABS_HI16}, |
| 654 | {BFD_RELOC_MSP430_PREL31, R_MSP430_PREL31}, |
| 655 | {BFD_RELOC_MSP430_10_PCREL, R_MSP430X_10_PCREL}, |
| 656 | {BFD_RELOC_MSP430_2X_PCREL, R_MSP430X_2X_PCREL}, |
| 657 | {BFD_RELOC_MSP430_RL_PCREL, R_MSP430X_PCR16}, |
| 658 | {BFD_RELOC_MSP430_SYM_DIFF, R_MSP430X_SYM_DIFF}, |
| 659 | {BFD_RELOC_MSP430_SET_ULEB128, R_MSP430X_GNU_SET_ULEB128 }, |
| 660 | {BFD_RELOC_MSP430_SUB_ULEB128, R_MSP430X_GNU_SUB_ULEB128 } |
| 661 | }; |
| 662 | |
| 663 | static inline bool |
| 664 | uses_msp430x_relocs (bfd * abfd) |
| 665 | { |
| 666 | extern const bfd_target msp430_elf32_ti_vec; |
| 667 | |
| 668 | return bfd_get_mach (abfd) == bfd_mach_msp430x |
| 669 | || abfd->xvec == & msp430_elf32_ti_vec; |
| 670 | } |
| 671 | |
| 672 | static reloc_howto_type * |
| 673 | bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
| 674 | bfd_reloc_code_real_type code) |
| 675 | { |
| 676 | unsigned int i; |
| 677 | |
| 678 | if (uses_msp430x_relocs (abfd)) |
| 679 | { |
| 680 | for (i = ARRAY_SIZE (msp430x_reloc_map); i--;) |
| 681 | if (msp430x_reloc_map[i].bfd_reloc_val == code) |
| 682 | return elf_msp430x_howto_table + msp430x_reloc_map[i].elf_reloc_val; |
| 683 | } |
| 684 | else |
| 685 | { |
| 686 | for (i = 0; i < ARRAY_SIZE (msp430_reloc_map); i++) |
| 687 | if (msp430_reloc_map[i].bfd_reloc_val == code) |
| 688 | return &elf_msp430_howto_table[msp430_reloc_map[i].elf_reloc_val]; |
| 689 | } |
| 690 | |
| 691 | return NULL; |
| 692 | } |
| 693 | |
| 694 | static reloc_howto_type * |
| 695 | bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 696 | const char *r_name) |
| 697 | { |
| 698 | unsigned int i; |
| 699 | |
| 700 | if (uses_msp430x_relocs (abfd)) |
| 701 | { |
| 702 | for (i = ARRAY_SIZE (elf_msp430x_howto_table); i--;) |
| 703 | if (elf_msp430x_howto_table[i].name != NULL |
| 704 | && strcasecmp (elf_msp430x_howto_table[i].name, r_name) == 0) |
| 705 | return elf_msp430x_howto_table + i; |
| 706 | } |
| 707 | else |
| 708 | { |
| 709 | for (i = 0; |
| 710 | i < (sizeof (elf_msp430_howto_table) |
| 711 | / sizeof (elf_msp430_howto_table[0])); |
| 712 | i++) |
| 713 | if (elf_msp430_howto_table[i].name != NULL |
| 714 | && strcasecmp (elf_msp430_howto_table[i].name, r_name) == 0) |
| 715 | return &elf_msp430_howto_table[i]; |
| 716 | } |
| 717 | |
| 718 | return NULL; |
| 719 | } |
| 720 | |
| 721 | /* Set the howto pointer for an MSP430 ELF reloc. */ |
| 722 | |
| 723 | static bool |
| 724 | msp430_info_to_howto_rela (bfd * abfd, |
| 725 | arelent * cache_ptr, |
| 726 | Elf_Internal_Rela * dst) |
| 727 | { |
| 728 | unsigned int r_type; |
| 729 | |
| 730 | r_type = ELF32_R_TYPE (dst->r_info); |
| 731 | |
| 732 | if (uses_msp430x_relocs (abfd)) |
| 733 | { |
| 734 | if (r_type >= (unsigned int) R_MSP430x_max) |
| 735 | { |
| 736 | /* xgettext:c-format */ |
| 737 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 738 | abfd, r_type); |
| 739 | bfd_set_error (bfd_error_bad_value); |
| 740 | return false; |
| 741 | } |
| 742 | cache_ptr->howto = elf_msp430x_howto_table + r_type; |
| 743 | } |
| 744 | else if (r_type >= (unsigned int) R_MSP430_max) |
| 745 | { |
| 746 | /* xgettext:c-format */ |
| 747 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| 748 | abfd, r_type); |
| 749 | bfd_set_error (bfd_error_bad_value); |
| 750 | return false; |
| 751 | } |
| 752 | else |
| 753 | cache_ptr->howto = &elf_msp430_howto_table[r_type]; |
| 754 | |
| 755 | return true; |
| 756 | } |
| 757 | |
| 758 | /* Look through the relocs for a section during the first phase. |
| 759 | Since we don't do .gots or .plts, we just need to consider the |
| 760 | virtual table relocs for gc. */ |
| 761 | |
| 762 | static bool |
| 763 | elf32_msp430_check_relocs (bfd * abfd, struct bfd_link_info * info, |
| 764 | asection * sec, const Elf_Internal_Rela * relocs) |
| 765 | { |
| 766 | Elf_Internal_Shdr *symtab_hdr; |
| 767 | struct elf_link_hash_entry **sym_hashes; |
| 768 | const Elf_Internal_Rela *rel; |
| 769 | const Elf_Internal_Rela *rel_end; |
| 770 | |
| 771 | if (bfd_link_relocatable (info)) |
| 772 | return true; |
| 773 | |
| 774 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 775 | sym_hashes = elf_sym_hashes (abfd); |
| 776 | |
| 777 | rel_end = relocs + sec->reloc_count; |
| 778 | for (rel = relocs; rel < rel_end; rel++) |
| 779 | { |
| 780 | struct elf_link_hash_entry *h; |
| 781 | unsigned long r_symndx; |
| 782 | |
| 783 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 784 | if (r_symndx < symtab_hdr->sh_info) |
| 785 | h = NULL; |
| 786 | else |
| 787 | { |
| 788 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 789 | while (h->root.type == bfd_link_hash_indirect |
| 790 | || h->root.type == bfd_link_hash_warning) |
| 791 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 792 | } |
| 793 | } |
| 794 | |
| 795 | return true; |
| 796 | } |
| 797 | |
| 798 | /* Perform a single relocation. By default we use the standard BFD |
| 799 | routines, but a few relocs, we have to do them ourselves. */ |
| 800 | |
| 801 | static bfd_reloc_status_type |
| 802 | msp430_final_link_relocate (reloc_howto_type * howto, |
| 803 | bfd * input_bfd, |
| 804 | asection * input_section, |
| 805 | bfd_byte * contents, |
| 806 | Elf_Internal_Rela * rel, |
| 807 | bfd_vma relocation, |
| 808 | struct bfd_link_info * info) |
| 809 | { |
| 810 | static asection * sym_diff_section; |
| 811 | static bfd_vma sym_diff_value; |
| 812 | |
| 813 | struct bfd_elf_section_data * esd = elf_section_data (input_section); |
| 814 | bfd_reloc_status_type r = bfd_reloc_ok; |
| 815 | bfd_vma x; |
| 816 | bfd_signed_vma srel; |
| 817 | bool is_rel_reloc = false; |
| 818 | |
| 819 | if (uses_msp430x_relocs (input_bfd)) |
| 820 | { |
| 821 | /* See if we have a REL type relocation. */ |
| 822 | is_rel_reloc = (esd->rel.hdr != NULL); |
| 823 | /* Sanity check - only one type of relocation per section. |
| 824 | FIXME: Theoretically it is possible to have both types, |
| 825 | but if that happens how can we distinguish between the two ? */ |
| 826 | BFD_ASSERT (! is_rel_reloc || ! esd->rela.hdr); |
| 827 | /* If we are using a REL relocation then the addend should be empty. */ |
| 828 | BFD_ASSERT (! is_rel_reloc || rel->r_addend == 0); |
| 829 | } |
| 830 | |
| 831 | if (debug_relocs) |
| 832 | printf ("writing relocation (%p) at 0x%lx type: %d\n", rel, |
| 833 | (long) (input_section->output_section->vma + input_section->output_offset |
| 834 | + rel->r_offset), howto->type); |
| 835 | if (sym_diff_section != NULL) |
| 836 | { |
| 837 | BFD_ASSERT (sym_diff_section == input_section); |
| 838 | |
| 839 | if (uses_msp430x_relocs (input_bfd)) |
| 840 | switch (howto->type) |
| 841 | { |
| 842 | case R_MSP430X_GNU_SET_ULEB128: |
| 843 | relocation += (!is_rel_reloc ? rel->r_addend : 0); |
| 844 | /* Fall through. */ |
| 845 | case R_MSP430_ABS32: |
| 846 | /* If we are computing a 32-bit value for the location lists |
| 847 | and the result is 0 then we add one to the value. A zero |
| 848 | value can result because of linker relaxation deleteing |
| 849 | prologue instructions and using a value of 1 (for the begin |
| 850 | and end offsets in the location list entry) results in a |
| 851 | nul entry which does not prevent the following entries from |
| 852 | being parsed. */ |
| 853 | if (relocation == sym_diff_value |
| 854 | && strcmp (input_section->name, ".debug_loc") == 0) |
| 855 | ++ relocation; |
| 856 | /* Fall through. */ |
| 857 | case R_MSP430_ABS16: |
| 858 | case R_MSP430X_ABS16: |
| 859 | case R_MSP430_ABS8: |
| 860 | BFD_ASSERT (! is_rel_reloc); |
| 861 | relocation -= sym_diff_value; |
| 862 | break; |
| 863 | |
| 864 | default: |
| 865 | return bfd_reloc_dangerous; |
| 866 | } |
| 867 | else |
| 868 | switch (howto->type) |
| 869 | { |
| 870 | case R_MSP430_GNU_SET_ULEB128: |
| 871 | relocation += (!is_rel_reloc ? rel->r_addend : 0); |
| 872 | /* Fall through. */ |
| 873 | case R_MSP430_32: |
| 874 | case R_MSP430_16: |
| 875 | case R_MSP430_16_BYTE: |
| 876 | case R_MSP430_8: |
| 877 | relocation -= sym_diff_value; |
| 878 | break; |
| 879 | |
| 880 | default: |
| 881 | return bfd_reloc_dangerous; |
| 882 | } |
| 883 | |
| 884 | sym_diff_section = NULL; |
| 885 | } |
| 886 | |
| 887 | if ((uses_msp430x_relocs (input_bfd) |
| 888 | && howto->type == R_MSP430X_GNU_SET_ULEB128) |
| 889 | || (!uses_msp430x_relocs (input_bfd) |
| 890 | && howto->type == R_MSP430_GNU_SET_ULEB128)) |
| 891 | { |
| 892 | unsigned int len, new_len = 0; |
| 893 | bfd_byte *endp, *p; |
| 894 | unsigned int val = relocation; |
| 895 | |
| 896 | _bfd_read_unsigned_leb128 (input_bfd, contents + rel->r_offset, &len); |
| 897 | |
| 898 | /* Clean the contents value to zero. Do not reduce the length. */ |
| 899 | p = contents + rel->r_offset; |
| 900 | endp = (p + len) - 1; |
| 901 | memset (p, 0x80, len - 1); |
| 902 | *(endp) = 0; |
| 903 | |
| 904 | /* Get the length of the new uleb128 value. */ |
| 905 | do |
| 906 | { |
| 907 | new_len++; |
| 908 | val >>= 7; |
| 909 | } while (val); |
| 910 | |
| 911 | if (new_len > len) |
| 912 | { |
| 913 | _bfd_error_handler |
| 914 | (_("error: final size of uleb128 value at offset 0x%lx in %pA " |
| 915 | "from %pB exceeds available space"), |
| 916 | (long) rel->r_offset, input_section, input_bfd); |
| 917 | } |
| 918 | else |
| 919 | { |
| 920 | /* If the number of bytes required to store the new value has |
| 921 | decreased, "right align" the new value within the available space, |
| 922 | so the MSB side is padded with uleb128 zeros (0x80). */ |
| 923 | p = _bfd_write_unsigned_leb128 (p + (len - new_len), endp, |
| 924 | relocation); |
| 925 | /* We checked there is enough space for the new value above, so this |
| 926 | should never be NULL. */ |
| 927 | BFD_ASSERT (p); |
| 928 | } |
| 929 | |
| 930 | return bfd_reloc_ok; |
| 931 | } |
| 932 | else if (uses_msp430x_relocs (input_bfd)) |
| 933 | switch (howto->type) |
| 934 | { |
| 935 | case R_MSP430X_SYM_DIFF: |
| 936 | case R_MSP430X_GNU_SUB_ULEB128: |
| 937 | /* Cache the input section and value. |
| 938 | The offset is unreliable, since relaxation may |
| 939 | have reduced the following reloc's offset. */ |
| 940 | BFD_ASSERT (! is_rel_reloc); |
| 941 | sym_diff_section = input_section; |
| 942 | sym_diff_value = relocation + (howto->type == R_MSP430X_GNU_SUB_ULEB128 |
| 943 | ? rel->r_addend : 0); |
| 944 | return bfd_reloc_ok; |
| 945 | |
| 946 | case R_MSP430_ABS16: |
| 947 | contents += rel->r_offset; |
| 948 | srel = (bfd_signed_vma) relocation; |
| 949 | if (is_rel_reloc) |
| 950 | srel += bfd_get_16 (input_bfd, contents); |
| 951 | else |
| 952 | srel += rel->r_addend; |
| 953 | bfd_put_16 (input_bfd, srel & 0xffff, contents); |
| 954 | break; |
| 955 | |
| 956 | case R_MSP430X_10_PCREL: |
| 957 | contents += rel->r_offset; |
| 958 | srel = (bfd_signed_vma) relocation; |
| 959 | if (is_rel_reloc) |
| 960 | srel += bfd_get_16 (input_bfd, contents) & 0x3ff; |
| 961 | else |
| 962 | srel += rel->r_addend; |
| 963 | srel -= rel->r_offset; |
| 964 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
| 965 | srel -= (input_section->output_section->vma + |
| 966 | input_section->output_offset); |
| 967 | if (srel & 1) |
| 968 | return bfd_reloc_outofrange; |
| 969 | |
| 970 | /* MSP430 addresses commands as words. */ |
| 971 | srel >>= 1; |
| 972 | |
| 973 | /* Check for an overflow. */ |
| 974 | if (srel < -512 || srel > 511) |
| 975 | { |
| 976 | if (info->disable_target_specific_optimizations < 0) |
| 977 | { |
| 978 | static bool warned = false; |
| 979 | if (! warned) |
| 980 | { |
| 981 | info->callbacks->warning |
| 982 | (info, |
| 983 | _("try enabling relaxation to avoid relocation truncations"), |
| 984 | NULL, input_bfd, input_section, relocation); |
| 985 | warned = true; |
| 986 | } |
| 987 | } |
| 988 | return bfd_reloc_overflow; |
| 989 | } |
| 990 | |
| 991 | x = bfd_get_16 (input_bfd, contents); |
| 992 | x = (x & 0xfc00) | (srel & 0x3ff); |
| 993 | bfd_put_16 (input_bfd, x, contents); |
| 994 | break; |
| 995 | |
| 996 | case R_MSP430X_PCR20_EXT_ODST: |
| 997 | /* [0,4]+[48,16] = ---F ---- ---- FFFF */ |
| 998 | contents += rel->r_offset; |
| 999 | srel = (bfd_signed_vma) relocation; |
| 1000 | if (is_rel_reloc) |
| 1001 | { |
| 1002 | bfd_vma addend; |
| 1003 | addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16; |
| 1004 | addend |= bfd_get_16 (input_bfd, contents + 6); |
| 1005 | srel += addend; |
| 1006 | |
| 1007 | } |
| 1008 | else |
| 1009 | srel += rel->r_addend; |
| 1010 | srel -= rel->r_offset; |
| 1011 | srel -= (input_section->output_section->vma + |
| 1012 | input_section->output_offset); |
| 1013 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 6); |
| 1014 | x = bfd_get_16 (input_bfd, contents); |
| 1015 | x = (x & 0xfff0) | ((srel >> 16) & 0xf); |
| 1016 | bfd_put_16 (input_bfd, x, contents); |
| 1017 | break; |
| 1018 | |
| 1019 | case R_MSP430X_ABS20_EXT_SRC: |
| 1020 | /* [7,4]+[32,16] = -78- ---- FFFF */ |
| 1021 | contents += rel->r_offset; |
| 1022 | srel = (bfd_signed_vma) relocation; |
| 1023 | if (is_rel_reloc) |
| 1024 | { |
| 1025 | bfd_vma addend; |
| 1026 | addend = (bfd_get_16 (input_bfd, contents) & 0x0780) << 9; |
| 1027 | addend |= bfd_get_16 (input_bfd, contents + 4); |
| 1028 | srel += addend; |
| 1029 | } |
| 1030 | else |
| 1031 | srel += rel->r_addend; |
| 1032 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4); |
| 1033 | srel >>= 16; |
| 1034 | x = bfd_get_16 (input_bfd, contents); |
| 1035 | x = (x & 0xf87f) | ((srel << 7) & 0x0780); |
| 1036 | bfd_put_16 (input_bfd, x, contents); |
| 1037 | break; |
| 1038 | |
| 1039 | case R_MSP430_16_PCREL: |
| 1040 | contents += rel->r_offset; |
| 1041 | srel = (bfd_signed_vma) relocation; |
| 1042 | if (is_rel_reloc) |
| 1043 | srel += bfd_get_16 (input_bfd, contents); |
| 1044 | else |
| 1045 | srel += rel->r_addend; |
| 1046 | srel -= rel->r_offset; |
| 1047 | /* Only branch instructions add 2 to the PC... */ |
| 1048 | srel -= (input_section->output_section->vma + |
| 1049 | input_section->output_offset); |
| 1050 | if (srel & 1) |
| 1051 | return bfd_reloc_outofrange; |
| 1052 | bfd_put_16 (input_bfd, srel & 0xffff, contents); |
| 1053 | break; |
| 1054 | |
| 1055 | case R_MSP430X_PCR20_EXT_DST: |
| 1056 | /* [0,4]+[32,16] = ---F ---- FFFF */ |
| 1057 | contents += rel->r_offset; |
| 1058 | srel = (bfd_signed_vma) relocation; |
| 1059 | if (is_rel_reloc) |
| 1060 | { |
| 1061 | bfd_vma addend; |
| 1062 | addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16; |
| 1063 | addend |= bfd_get_16 (input_bfd, contents + 4); |
| 1064 | srel += addend; |
| 1065 | } |
| 1066 | else |
| 1067 | srel += rel->r_addend; |
| 1068 | srel -= rel->r_offset; |
| 1069 | srel -= (input_section->output_section->vma + |
| 1070 | input_section->output_offset); |
| 1071 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4); |
| 1072 | srel >>= 16; |
| 1073 | x = bfd_get_16 (input_bfd, contents); |
| 1074 | x = (x & 0xfff0) | (srel & 0xf); |
| 1075 | bfd_put_16 (input_bfd, x, contents); |
| 1076 | break; |
| 1077 | |
| 1078 | case R_MSP430X_PCR20_EXT_SRC: |
| 1079 | /* [7,4]+[32,16] = -78- ---- FFFF */ |
| 1080 | contents += rel->r_offset; |
| 1081 | srel = (bfd_signed_vma) relocation; |
| 1082 | if (is_rel_reloc) |
| 1083 | { |
| 1084 | bfd_vma addend; |
| 1085 | addend = ((bfd_get_16 (input_bfd, contents) & 0x0780) << 9); |
| 1086 | addend |= bfd_get_16 (input_bfd, contents + 4); |
| 1087 | srel += addend;; |
| 1088 | } |
| 1089 | else |
| 1090 | srel += rel->r_addend; |
| 1091 | srel -= rel->r_offset; |
| 1092 | /* Only branch instructions add 2 to the PC... */ |
| 1093 | srel -= (input_section->output_section->vma + |
| 1094 | input_section->output_offset); |
| 1095 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4); |
| 1096 | srel >>= 16; |
| 1097 | x = bfd_get_16 (input_bfd, contents); |
| 1098 | x = (x & 0xf87f) | ((srel << 7) & 0x0780); |
| 1099 | bfd_put_16 (input_bfd, x, contents); |
| 1100 | break; |
| 1101 | |
| 1102 | case R_MSP430_ABS8: |
| 1103 | contents += rel->r_offset; |
| 1104 | srel = (bfd_signed_vma) relocation; |
| 1105 | if (is_rel_reloc) |
| 1106 | srel += bfd_get_8 (input_bfd, contents); |
| 1107 | else |
| 1108 | srel += rel->r_addend; |
| 1109 | bfd_put_8 (input_bfd, srel & 0xff, contents); |
| 1110 | break; |
| 1111 | |
| 1112 | case R_MSP430X_ABS20_EXT_DST: |
| 1113 | /* [0,4]+[32,16] = ---F ---- FFFF */ |
| 1114 | contents += rel->r_offset; |
| 1115 | srel = (bfd_signed_vma) relocation; |
| 1116 | if (is_rel_reloc) |
| 1117 | { |
| 1118 | bfd_vma addend; |
| 1119 | addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16; |
| 1120 | addend |= bfd_get_16 (input_bfd, contents + 4); |
| 1121 | srel += addend; |
| 1122 | } |
| 1123 | else |
| 1124 | srel += rel->r_addend; |
| 1125 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4); |
| 1126 | srel >>= 16; |
| 1127 | x = bfd_get_16 (input_bfd, contents); |
| 1128 | x = (x & 0xfff0) | (srel & 0xf); |
| 1129 | bfd_put_16 (input_bfd, x, contents); |
| 1130 | break; |
| 1131 | |
| 1132 | case R_MSP430X_ABS20_EXT_ODST: |
| 1133 | /* [0,4]+[48,16] = ---F ---- ---- FFFF */ |
| 1134 | contents += rel->r_offset; |
| 1135 | srel = (bfd_signed_vma) relocation; |
| 1136 | if (is_rel_reloc) |
| 1137 | { |
| 1138 | bfd_vma addend; |
| 1139 | addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16; |
| 1140 | addend |= bfd_get_16 (input_bfd, contents + 6); |
| 1141 | srel += addend; |
| 1142 | } |
| 1143 | else |
| 1144 | srel += rel->r_addend; |
| 1145 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 6); |
| 1146 | srel >>= 16; |
| 1147 | x = bfd_get_16 (input_bfd, contents); |
| 1148 | x = (x & 0xfff0) | (srel & 0xf); |
| 1149 | bfd_put_16 (input_bfd, x, contents); |
| 1150 | break; |
| 1151 | |
| 1152 | case R_MSP430X_ABS20_ADR_SRC: |
| 1153 | /* [8,4]+[16,16] = -F-- FFFF */ |
| 1154 | contents += rel->r_offset; |
| 1155 | srel = (bfd_signed_vma) relocation; |
| 1156 | if (is_rel_reloc) |
| 1157 | { |
| 1158 | bfd_vma addend; |
| 1159 | |
| 1160 | addend = ((bfd_get_16 (input_bfd, contents) & 0xf00) << 8); |
| 1161 | addend |= bfd_get_16 (input_bfd, contents + 2); |
| 1162 | srel += addend; |
| 1163 | } |
| 1164 | else |
| 1165 | srel += rel->r_addend; |
| 1166 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 2); |
| 1167 | srel >>= 16; |
| 1168 | x = bfd_get_16 (input_bfd, contents); |
| 1169 | x = (x & 0xf0ff) | ((srel << 8) & 0x0f00); |
| 1170 | bfd_put_16 (input_bfd, x, contents); |
| 1171 | break; |
| 1172 | |
| 1173 | case R_MSP430X_ABS20_ADR_DST: |
| 1174 | /* [0,4]+[16,16] = ---F FFFF */ |
| 1175 | contents += rel->r_offset; |
| 1176 | srel = (bfd_signed_vma) relocation; |
| 1177 | if (is_rel_reloc) |
| 1178 | { |
| 1179 | bfd_vma addend; |
| 1180 | addend = ((bfd_get_16 (input_bfd, contents) & 0xf) << 16); |
| 1181 | addend |= bfd_get_16 (input_bfd, contents + 2); |
| 1182 | srel += addend; |
| 1183 | } |
| 1184 | else |
| 1185 | srel += rel->r_addend; |
| 1186 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 2); |
| 1187 | srel >>= 16; |
| 1188 | x = bfd_get_16 (input_bfd, contents); |
| 1189 | x = (x & 0xfff0) | (srel & 0xf); |
| 1190 | bfd_put_16 (input_bfd, x, contents); |
| 1191 | break; |
| 1192 | |
| 1193 | case R_MSP430X_ABS16: |
| 1194 | contents += rel->r_offset; |
| 1195 | srel = (bfd_signed_vma) relocation; |
| 1196 | if (is_rel_reloc) |
| 1197 | srel += bfd_get_16 (input_bfd, contents); |
| 1198 | else |
| 1199 | srel += rel->r_addend; |
| 1200 | x = srel; |
| 1201 | if (x > 0xffff) |
| 1202 | return bfd_reloc_overflow; |
| 1203 | bfd_put_16 (input_bfd, srel & 0xffff, contents); |
| 1204 | break; |
| 1205 | |
| 1206 | case R_MSP430_ABS_HI16: |
| 1207 | /* The EABI specifies that this must be a RELA reloc. */ |
| 1208 | BFD_ASSERT (! is_rel_reloc); |
| 1209 | contents += rel->r_offset; |
| 1210 | srel = (bfd_signed_vma) relocation; |
| 1211 | srel += rel->r_addend; |
| 1212 | bfd_put_16 (input_bfd, (srel >> 16) & 0xffff, contents); |
| 1213 | break; |
| 1214 | |
| 1215 | case R_MSP430X_PCR20_CALL: |
| 1216 | /* [0,4]+[16,16] = ---F FFFF*/ |
| 1217 | contents += rel->r_offset; |
| 1218 | srel = (bfd_signed_vma) relocation; |
| 1219 | if (is_rel_reloc) |
| 1220 | { |
| 1221 | bfd_vma addend; |
| 1222 | addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16; |
| 1223 | addend |= bfd_get_16 (input_bfd, contents + 2); |
| 1224 | srel += addend; |
| 1225 | } |
| 1226 | else |
| 1227 | srel += rel->r_addend; |
| 1228 | srel -= rel->r_offset; |
| 1229 | srel -= (input_section->output_section->vma + |
| 1230 | input_section->output_offset); |
| 1231 | bfd_put_16 (input_bfd, srel & 0xffff, contents + 2); |
| 1232 | srel >>= 16; |
| 1233 | x = bfd_get_16 (input_bfd, contents); |
| 1234 | x = (x & 0xfff0) | (srel & 0xf); |
| 1235 | bfd_put_16 (input_bfd, x, contents); |
| 1236 | break; |
| 1237 | |
| 1238 | case R_MSP430X_PCR16: |
| 1239 | contents += rel->r_offset; |
| 1240 | srel = (bfd_signed_vma) relocation; |
| 1241 | if (is_rel_reloc) |
| 1242 | srel += bfd_get_16 (input_bfd, contents); |
| 1243 | else |
| 1244 | srel += rel->r_addend; |
| 1245 | srel -= rel->r_offset; |
| 1246 | srel -= (input_section->output_section->vma + |
| 1247 | input_section->output_offset); |
| 1248 | bfd_put_16 (input_bfd, srel & 0xffff, contents); |
| 1249 | break; |
| 1250 | |
| 1251 | case R_MSP430_PREL31: |
| 1252 | contents += rel->r_offset; |
| 1253 | srel = (bfd_signed_vma) relocation; |
| 1254 | if (is_rel_reloc) |
| 1255 | srel += (bfd_get_32 (input_bfd, contents) & 0x7fffffff); |
| 1256 | else |
| 1257 | srel += rel->r_addend; |
| 1258 | srel += rel->r_addend; |
| 1259 | x = bfd_get_32 (input_bfd, contents); |
| 1260 | x = (x & 0x80000000) | ((srel >> 31) & 0x7fffffff); |
| 1261 | bfd_put_32 (input_bfd, x, contents); |
| 1262 | break; |
| 1263 | |
| 1264 | default: |
| 1265 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 1266 | contents, rel->r_offset, |
| 1267 | relocation, rel->r_addend); |
| 1268 | } |
| 1269 | else |
| 1270 | switch (howto->type) |
| 1271 | { |
| 1272 | case R_MSP430_10_PCREL: |
| 1273 | contents += rel->r_offset; |
| 1274 | srel = (bfd_signed_vma) relocation; |
| 1275 | srel += rel->r_addend; |
| 1276 | srel -= rel->r_offset; |
| 1277 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
| 1278 | srel -= (input_section->output_section->vma + |
| 1279 | input_section->output_offset); |
| 1280 | |
| 1281 | if (srel & 1) |
| 1282 | return bfd_reloc_outofrange; |
| 1283 | |
| 1284 | /* MSP430 addresses commands as words. */ |
| 1285 | srel >>= 1; |
| 1286 | |
| 1287 | /* Check for an overflow. */ |
| 1288 | if (srel < -512 || srel > 511) |
| 1289 | { |
| 1290 | if (info->disable_target_specific_optimizations < 0) |
| 1291 | { |
| 1292 | static bool warned = false; |
| 1293 | if (! warned) |
| 1294 | { |
| 1295 | info->callbacks->warning |
| 1296 | (info, |
| 1297 | _("try enabling relaxation to avoid relocation truncations"), |
| 1298 | NULL, input_bfd, input_section, relocation); |
| 1299 | warned = true; |
| 1300 | } |
| 1301 | } |
| 1302 | return bfd_reloc_overflow; |
| 1303 | } |
| 1304 | |
| 1305 | x = bfd_get_16 (input_bfd, contents); |
| 1306 | x = (x & 0xfc00) | (srel & 0x3ff); |
| 1307 | bfd_put_16 (input_bfd, x, contents); |
| 1308 | break; |
| 1309 | |
| 1310 | case R_MSP430_2X_PCREL: |
| 1311 | contents += rel->r_offset; |
| 1312 | srel = (bfd_signed_vma) relocation; |
| 1313 | srel += rel->r_addend; |
| 1314 | srel -= rel->r_offset; |
| 1315 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
| 1316 | srel -= (input_section->output_section->vma + |
| 1317 | input_section->output_offset); |
| 1318 | |
| 1319 | if (srel & 1) |
| 1320 | return bfd_reloc_outofrange; |
| 1321 | |
| 1322 | /* MSP430 addresses commands as words. */ |
| 1323 | srel >>= 1; |
| 1324 | |
| 1325 | /* Check for an overflow. */ |
| 1326 | if (srel < -512 || srel > 511) |
| 1327 | return bfd_reloc_overflow; |
| 1328 | |
| 1329 | x = bfd_get_16 (input_bfd, contents); |
| 1330 | x = (x & 0xfc00) | (srel & 0x3ff); |
| 1331 | bfd_put_16 (input_bfd, x, contents); |
| 1332 | /* Handle second jump instruction. */ |
| 1333 | x = bfd_get_16 (input_bfd, contents - 2); |
| 1334 | srel += 1; |
| 1335 | x = (x & 0xfc00) | (srel & 0x3ff); |
| 1336 | bfd_put_16 (input_bfd, x, contents - 2); |
| 1337 | break; |
| 1338 | |
| 1339 | case R_MSP430_RL_PCREL: |
| 1340 | case R_MSP430_16_PCREL: |
| 1341 | contents += rel->r_offset; |
| 1342 | srel = (bfd_signed_vma) relocation; |
| 1343 | srel += rel->r_addend; |
| 1344 | srel -= rel->r_offset; |
| 1345 | /* Only branch instructions add 2 to the PC... */ |
| 1346 | srel -= (input_section->output_section->vma + |
| 1347 | input_section->output_offset); |
| 1348 | |
| 1349 | if (srel & 1) |
| 1350 | return bfd_reloc_outofrange; |
| 1351 | |
| 1352 | bfd_put_16 (input_bfd, srel & 0xffff, contents); |
| 1353 | break; |
| 1354 | |
| 1355 | case R_MSP430_16_PCREL_BYTE: |
| 1356 | contents += rel->r_offset; |
| 1357 | srel = (bfd_signed_vma) relocation; |
| 1358 | srel += rel->r_addend; |
| 1359 | srel -= rel->r_offset; |
| 1360 | /* Only branch instructions add 2 to the PC... */ |
| 1361 | srel -= (input_section->output_section->vma + |
| 1362 | input_section->output_offset); |
| 1363 | |
| 1364 | bfd_put_16 (input_bfd, srel & 0xffff, contents); |
| 1365 | break; |
| 1366 | |
| 1367 | case R_MSP430_16_BYTE: |
| 1368 | contents += rel->r_offset; |
| 1369 | srel = (bfd_signed_vma) relocation; |
| 1370 | srel += rel->r_addend; |
| 1371 | bfd_put_16 (input_bfd, srel & 0xffff, contents); |
| 1372 | break; |
| 1373 | |
| 1374 | case R_MSP430_16: |
| 1375 | contents += rel->r_offset; |
| 1376 | srel = (bfd_signed_vma) relocation; |
| 1377 | srel += rel->r_addend; |
| 1378 | |
| 1379 | if (srel & 1) |
| 1380 | return bfd_reloc_notsupported; |
| 1381 | |
| 1382 | bfd_put_16 (input_bfd, srel & 0xffff, contents); |
| 1383 | break; |
| 1384 | |
| 1385 | case R_MSP430_8: |
| 1386 | contents += rel->r_offset; |
| 1387 | srel = (bfd_signed_vma) relocation; |
| 1388 | srel += rel->r_addend; |
| 1389 | |
| 1390 | bfd_put_8 (input_bfd, srel & 0xff, contents); |
| 1391 | break; |
| 1392 | |
| 1393 | case R_MSP430_SYM_DIFF: |
| 1394 | case R_MSP430_GNU_SUB_ULEB128: |
| 1395 | /* Cache the input section and value. |
| 1396 | The offset is unreliable, since relaxation may |
| 1397 | have reduced the following reloc's offset. */ |
| 1398 | sym_diff_section = input_section; |
| 1399 | sym_diff_value = relocation + (howto->type == R_MSP430_GNU_SUB_ULEB128 |
| 1400 | ? rel->r_addend : 0); |
| 1401 | return bfd_reloc_ok; |
| 1402 | |
| 1403 | default: |
| 1404 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 1405 | contents, rel->r_offset, |
| 1406 | relocation, rel->r_addend); |
| 1407 | } |
| 1408 | |
| 1409 | return r; |
| 1410 | } |
| 1411 | |
| 1412 | /* Relocate an MSP430 ELF section. */ |
| 1413 | |
| 1414 | static int |
| 1415 | elf32_msp430_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 1416 | struct bfd_link_info * info, |
| 1417 | bfd * input_bfd, |
| 1418 | asection * input_section, |
| 1419 | bfd_byte * contents, |
| 1420 | Elf_Internal_Rela * relocs, |
| 1421 | Elf_Internal_Sym * local_syms, |
| 1422 | asection ** local_sections) |
| 1423 | { |
| 1424 | Elf_Internal_Shdr *symtab_hdr; |
| 1425 | struct elf_link_hash_entry **sym_hashes; |
| 1426 | Elf_Internal_Rela *rel; |
| 1427 | Elf_Internal_Rela *relend; |
| 1428 | |
| 1429 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1430 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1431 | relend = relocs + input_section->reloc_count; |
| 1432 | |
| 1433 | for (rel = relocs; rel < relend; rel++) |
| 1434 | { |
| 1435 | reloc_howto_type *howto; |
| 1436 | unsigned long r_symndx; |
| 1437 | Elf_Internal_Sym *sym; |
| 1438 | asection *sec; |
| 1439 | struct elf_link_hash_entry *h; |
| 1440 | bfd_vma relocation; |
| 1441 | bfd_reloc_status_type r; |
| 1442 | const char *name = NULL; |
| 1443 | int r_type; |
| 1444 | |
| 1445 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1446 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1447 | |
| 1448 | if (uses_msp430x_relocs (input_bfd)) |
| 1449 | howto = elf_msp430x_howto_table + r_type; |
| 1450 | else |
| 1451 | howto = elf_msp430_howto_table + r_type; |
| 1452 | |
| 1453 | h = NULL; |
| 1454 | sym = NULL; |
| 1455 | sec = NULL; |
| 1456 | |
| 1457 | if (r_symndx < symtab_hdr->sh_info) |
| 1458 | { |
| 1459 | sym = local_syms + r_symndx; |
| 1460 | sec = local_sections[r_symndx]; |
| 1461 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| 1462 | |
| 1463 | name = bfd_elf_string_from_elf_section |
| 1464 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| 1465 | name = name == NULL || *name == 0 ? bfd_section_name (sec) : name; |
| 1466 | } |
| 1467 | else |
| 1468 | { |
| 1469 | bool unresolved_reloc, warned, ignored; |
| 1470 | |
| 1471 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| 1472 | r_symndx, symtab_hdr, sym_hashes, |
| 1473 | h, sec, relocation, |
| 1474 | unresolved_reloc, warned, ignored); |
| 1475 | name = h->root.root.string; |
| 1476 | } |
| 1477 | |
| 1478 | if (sec != NULL && discarded_section (sec)) |
| 1479 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| 1480 | rel, 1, relend, howto, 0, contents); |
| 1481 | |
| 1482 | if (bfd_link_relocatable (info)) |
| 1483 | continue; |
| 1484 | |
| 1485 | r = msp430_final_link_relocate (howto, input_bfd, input_section, |
| 1486 | contents, rel, relocation, info); |
| 1487 | |
| 1488 | if (r != bfd_reloc_ok) |
| 1489 | { |
| 1490 | const char *msg = (const char *) NULL; |
| 1491 | |
| 1492 | switch (r) |
| 1493 | { |
| 1494 | case bfd_reloc_overflow: |
| 1495 | (*info->callbacks->reloc_overflow) |
| 1496 | (info, (h ? &h->root : NULL), name, howto->name, |
| 1497 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| 1498 | break; |
| 1499 | |
| 1500 | case bfd_reloc_undefined: |
| 1501 | (*info->callbacks->undefined_symbol) |
| 1502 | (info, name, input_bfd, input_section, rel->r_offset, true); |
| 1503 | break; |
| 1504 | |
| 1505 | case bfd_reloc_outofrange: |
| 1506 | msg = _("internal error: branch/jump to an odd address detected"); |
| 1507 | break; |
| 1508 | |
| 1509 | case bfd_reloc_notsupported: |
| 1510 | msg = _("internal error: unsupported relocation error"); |
| 1511 | break; |
| 1512 | |
| 1513 | case bfd_reloc_dangerous: |
| 1514 | msg = _("internal error: dangerous relocation"); |
| 1515 | break; |
| 1516 | |
| 1517 | default: |
| 1518 | msg = _("internal error: unknown error"); |
| 1519 | break; |
| 1520 | } |
| 1521 | |
| 1522 | if (msg) |
| 1523 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
| 1524 | input_section, rel->r_offset); |
| 1525 | } |
| 1526 | |
| 1527 | } |
| 1528 | |
| 1529 | return true; |
| 1530 | } |
| 1531 | |
| 1532 | /* The final processing done just before writing out a MSP430 ELF object |
| 1533 | file. This gets the MSP430 architecture right based on the machine |
| 1534 | number. */ |
| 1535 | |
| 1536 | static bool |
| 1537 | bfd_elf_msp430_final_write_processing (bfd *abfd) |
| 1538 | { |
| 1539 | unsigned long val; |
| 1540 | |
| 1541 | switch (bfd_get_mach (abfd)) |
| 1542 | { |
| 1543 | default: |
| 1544 | case bfd_mach_msp110: val = E_MSP430_MACH_MSP430x11x1; break; |
| 1545 | case bfd_mach_msp11: val = E_MSP430_MACH_MSP430x11; break; |
| 1546 | case bfd_mach_msp12: val = E_MSP430_MACH_MSP430x12; break; |
| 1547 | case bfd_mach_msp13: val = E_MSP430_MACH_MSP430x13; break; |
| 1548 | case bfd_mach_msp14: val = E_MSP430_MACH_MSP430x14; break; |
| 1549 | case bfd_mach_msp15: val = E_MSP430_MACH_MSP430x15; break; |
| 1550 | case bfd_mach_msp16: val = E_MSP430_MACH_MSP430x16; break; |
| 1551 | case bfd_mach_msp31: val = E_MSP430_MACH_MSP430x31; break; |
| 1552 | case bfd_mach_msp32: val = E_MSP430_MACH_MSP430x32; break; |
| 1553 | case bfd_mach_msp33: val = E_MSP430_MACH_MSP430x33; break; |
| 1554 | case bfd_mach_msp41: val = E_MSP430_MACH_MSP430x41; break; |
| 1555 | case bfd_mach_msp42: val = E_MSP430_MACH_MSP430x42; break; |
| 1556 | case bfd_mach_msp43: val = E_MSP430_MACH_MSP430x43; break; |
| 1557 | case bfd_mach_msp44: val = E_MSP430_MACH_MSP430x44; break; |
| 1558 | case bfd_mach_msp20: val = E_MSP430_MACH_MSP430x20; break; |
| 1559 | case bfd_mach_msp22: val = E_MSP430_MACH_MSP430x22; break; |
| 1560 | case bfd_mach_msp23: val = E_MSP430_MACH_MSP430x23; break; |
| 1561 | case bfd_mach_msp24: val = E_MSP430_MACH_MSP430x24; break; |
| 1562 | case bfd_mach_msp26: val = E_MSP430_MACH_MSP430x26; break; |
| 1563 | case bfd_mach_msp46: val = E_MSP430_MACH_MSP430x46; break; |
| 1564 | case bfd_mach_msp47: val = E_MSP430_MACH_MSP430x47; break; |
| 1565 | case bfd_mach_msp54: val = E_MSP430_MACH_MSP430x54; break; |
| 1566 | case bfd_mach_msp430x: val = E_MSP430_MACH_MSP430X; break; |
| 1567 | } |
| 1568 | |
| 1569 | elf_elfheader (abfd)->e_machine = EM_MSP430; |
| 1570 | elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH; |
| 1571 | elf_elfheader (abfd)->e_flags |= val; |
| 1572 | return _bfd_elf_final_write_processing (abfd); |
| 1573 | } |
| 1574 | |
| 1575 | /* Set the right machine number. */ |
| 1576 | |
| 1577 | static bool |
| 1578 | elf32_msp430_object_p (bfd * abfd) |
| 1579 | { |
| 1580 | int e_set = bfd_mach_msp14; |
| 1581 | |
| 1582 | if (elf_elfheader (abfd)->e_machine == EM_MSP430 |
| 1583 | || elf_elfheader (abfd)->e_machine == EM_MSP430_OLD) |
| 1584 | { |
| 1585 | int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH; |
| 1586 | |
| 1587 | switch (e_mach) |
| 1588 | { |
| 1589 | default: |
| 1590 | case E_MSP430_MACH_MSP430x11: e_set = bfd_mach_msp11; break; |
| 1591 | case E_MSP430_MACH_MSP430x11x1: e_set = bfd_mach_msp110; break; |
| 1592 | case E_MSP430_MACH_MSP430x12: e_set = bfd_mach_msp12; break; |
| 1593 | case E_MSP430_MACH_MSP430x13: e_set = bfd_mach_msp13; break; |
| 1594 | case E_MSP430_MACH_MSP430x14: e_set = bfd_mach_msp14; break; |
| 1595 | case E_MSP430_MACH_MSP430x15: e_set = bfd_mach_msp15; break; |
| 1596 | case E_MSP430_MACH_MSP430x16: e_set = bfd_mach_msp16; break; |
| 1597 | case E_MSP430_MACH_MSP430x31: e_set = bfd_mach_msp31; break; |
| 1598 | case E_MSP430_MACH_MSP430x32: e_set = bfd_mach_msp32; break; |
| 1599 | case E_MSP430_MACH_MSP430x33: e_set = bfd_mach_msp33; break; |
| 1600 | case E_MSP430_MACH_MSP430x41: e_set = bfd_mach_msp41; break; |
| 1601 | case E_MSP430_MACH_MSP430x42: e_set = bfd_mach_msp42; break; |
| 1602 | case E_MSP430_MACH_MSP430x43: e_set = bfd_mach_msp43; break; |
| 1603 | case E_MSP430_MACH_MSP430x44: e_set = bfd_mach_msp44; break; |
| 1604 | case E_MSP430_MACH_MSP430x20: e_set = bfd_mach_msp20; break; |
| 1605 | case E_MSP430_MACH_MSP430x22: e_set = bfd_mach_msp22; break; |
| 1606 | case E_MSP430_MACH_MSP430x23: e_set = bfd_mach_msp23; break; |
| 1607 | case E_MSP430_MACH_MSP430x24: e_set = bfd_mach_msp24; break; |
| 1608 | case E_MSP430_MACH_MSP430x26: e_set = bfd_mach_msp26; break; |
| 1609 | case E_MSP430_MACH_MSP430x46: e_set = bfd_mach_msp46; break; |
| 1610 | case E_MSP430_MACH_MSP430x47: e_set = bfd_mach_msp47; break; |
| 1611 | case E_MSP430_MACH_MSP430x54: e_set = bfd_mach_msp54; break; |
| 1612 | case E_MSP430_MACH_MSP430X: e_set = bfd_mach_msp430x; break; |
| 1613 | } |
| 1614 | } |
| 1615 | |
| 1616 | return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set); |
| 1617 | } |
| 1618 | |
| 1619 | /* These functions handle relaxing for the msp430. |
| 1620 | Relaxation required only in two cases: |
| 1621 | - Bad hand coding like jumps from one section to another or |
| 1622 | from file to file. |
| 1623 | - Sibling calls. This will affect only 'jump label' polymorph. Without |
| 1624 | relaxing this enlarges code by 2 bytes. Sibcalls implemented but |
| 1625 | do not work in gcc's port by the reason I do not know. |
| 1626 | - To convert out of range conditional jump instructions (found inside |
| 1627 | a function) into inverted jumps over an unconditional branch instruction. |
| 1628 | Anyway, if a relaxation required, user should pass -relax option to the |
| 1629 | linker. |
| 1630 | |
| 1631 | There are quite a few relaxing opportunities available on the msp430: |
| 1632 | |
| 1633 | ================================================================ |
| 1634 | |
| 1635 | 1. 3 words -> 1 word |
| 1636 | |
| 1637 | eq == jeq label jne +4; br lab |
| 1638 | ne != jne label jeq +4; br lab |
| 1639 | lt < jl label jge +4; br lab |
| 1640 | ltu < jlo label lhs +4; br lab |
| 1641 | ge >= jge label jl +4; br lab |
| 1642 | geu >= jhs label jlo +4; br lab |
| 1643 | |
| 1644 | 2. 4 words -> 1 word |
| 1645 | |
| 1646 | ltn < jn jn +2; jmp +4; br lab |
| 1647 | |
| 1648 | 3. 4 words -> 2 words |
| 1649 | |
| 1650 | gt > jeq +2; jge label jeq +6; jl +4; br label |
| 1651 | gtu > jeq +2; jhs label jeq +6; jlo +4; br label |
| 1652 | |
| 1653 | 4. 4 words -> 2 words and 2 labels |
| 1654 | |
| 1655 | leu <= jeq label; jlo label jeq +2; jhs +4; br label |
| 1656 | le <= jeq label; jl label jeq +2; jge +4; br label |
| 1657 | ================================================================= |
| 1658 | |
| 1659 | codemap for first cases is (labels masked ): |
| 1660 | eq: 0x2002,0x4010,0x0000 -> 0x2400 |
| 1661 | ne: 0x2402,0x4010,0x0000 -> 0x2000 |
| 1662 | lt: 0x3402,0x4010,0x0000 -> 0x3800 |
| 1663 | ltu: 0x2c02,0x4010,0x0000 -> 0x2800 |
| 1664 | ge: 0x3802,0x4010,0x0000 -> 0x3400 |
| 1665 | geu: 0x2802,0x4010,0x0000 -> 0x2c00 |
| 1666 | |
| 1667 | second case: |
| 1668 | ltn: 0x3001,0x3c02,0x4010,0x0000 -> 0x3000 |
| 1669 | |
| 1670 | third case: |
| 1671 | gt: 0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400 |
| 1672 | gtu: 0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00 |
| 1673 | |
| 1674 | fourth case: |
| 1675 | leu: 0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800 |
| 1676 | le: 0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800 |
| 1677 | |
| 1678 | Unspecified case :) |
| 1679 | jump: 0x4010,0x0000 -> 0x3c00. */ |
| 1680 | |
| 1681 | #define NUMB_RELAX_CODES 12 |
| 1682 | static struct rcodes_s |
| 1683 | { |
| 1684 | int f0, f1; /* From code. */ |
| 1685 | int t0, t1; /* To code. */ |
| 1686 | int labels; /* Position of labels: 1 - one label at first |
| 1687 | word, 2 - one at second word, 3 - two |
| 1688 | labels at both. */ |
| 1689 | int cdx; /* Words to match. */ |
| 1690 | int bs; /* Shrink bytes. */ |
| 1691 | int off; /* Offset from old label for new code. */ |
| 1692 | int ncl; /* New code length. */ |
| 1693 | } rcode[] = |
| 1694 | {/* lab,cdx,bs,off,ncl */ |
| 1695 | { 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2, 2}, /* jump */ |
| 1696 | { 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4, 2}, /* eq */ |
| 1697 | { 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4, 2}, /* ne */ |
| 1698 | { 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4, 2}, /* lt */ |
| 1699 | { 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4, 2}, /* ltu */ |
| 1700 | { 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4, 2}, /* ge */ |
| 1701 | { 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4, 2}, /* geu */ |
| 1702 | { 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6, 2}, /* ltn */ |
| 1703 | { 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6, 4}, /* gt */ |
| 1704 | { 0x2403, 0x2802, 0x2401, 0x2c00, 2, 2, 4, 6, 4}, /* gtu */ |
| 1705 | { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* leu , 2 labels */ |
| 1706 | { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* le , 2 labels */ |
| 1707 | { 0, 0, 0, 0, 0, 0, 0, 0, 0} |
| 1708 | }; |
| 1709 | |
| 1710 | /* Return TRUE if a symbol exists at the given address. */ |
| 1711 | |
| 1712 | static bool |
| 1713 | msp430_elf_symbol_address_p (bfd * abfd, |
| 1714 | asection * sec, |
| 1715 | Elf_Internal_Sym * isym, |
| 1716 | bfd_vma addr) |
| 1717 | { |
| 1718 | Elf_Internal_Shdr *symtab_hdr; |
| 1719 | unsigned int sec_shndx; |
| 1720 | Elf_Internal_Sym *isymend; |
| 1721 | struct elf_link_hash_entry **sym_hashes; |
| 1722 | struct elf_link_hash_entry **end_hashes; |
| 1723 | unsigned int symcount; |
| 1724 | |
| 1725 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1726 | |
| 1727 | /* Examine all the local symbols. */ |
| 1728 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 1729 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| 1730 | if (isym->st_shndx == sec_shndx && isym->st_value == addr) |
| 1731 | return true; |
| 1732 | |
| 1733 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 1734 | - symtab_hdr->sh_info); |
| 1735 | sym_hashes = elf_sym_hashes (abfd); |
| 1736 | end_hashes = sym_hashes + symcount; |
| 1737 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 1738 | { |
| 1739 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 1740 | |
| 1741 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 1742 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 1743 | && sym_hash->root.u.def.section == sec |
| 1744 | && sym_hash->root.u.def.value == addr) |
| 1745 | return true; |
| 1746 | } |
| 1747 | |
| 1748 | return false; |
| 1749 | } |
| 1750 | |
| 1751 | /* Adjust all local symbols defined as '.section + 0xXXXX' (.section has |
| 1752 | sec_shndx) referenced from current and other sections. */ |
| 1753 | |
| 1754 | static bool |
| 1755 | msp430_elf_relax_adjust_locals (bfd * abfd, asection * sec, bfd_vma addr, |
| 1756 | int count, unsigned int sec_shndx, |
| 1757 | bfd_vma toaddr) |
| 1758 | { |
| 1759 | Elf_Internal_Shdr *symtab_hdr; |
| 1760 | Elf_Internal_Rela *irel; |
| 1761 | Elf_Internal_Rela *irelend; |
| 1762 | Elf_Internal_Sym *isym; |
| 1763 | |
| 1764 | irel = elf_section_data (sec)->relocs; |
| 1765 | if (irel == NULL) |
| 1766 | return true; |
| 1767 | |
| 1768 | irelend = irel + sec->reloc_count; |
| 1769 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| 1770 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1771 | |
| 1772 | for (;irel < irelend; irel++) |
| 1773 | { |
| 1774 | unsigned int sidx = ELF32_R_SYM(irel->r_info); |
| 1775 | Elf_Internal_Sym *lsym = isym + sidx; |
| 1776 | |
| 1777 | /* Adjust symbols referenced by .sec+0xXX. */ |
| 1778 | if (irel->r_addend > addr && irel->r_addend < toaddr |
| 1779 | && sidx < symtab_hdr->sh_info |
| 1780 | && lsym->st_shndx == sec_shndx) |
| 1781 | irel->r_addend -= count; |
| 1782 | } |
| 1783 | |
| 1784 | return true; |
| 1785 | } |
| 1786 | |
| 1787 | /* Delete some bytes from a section while relaxing. */ |
| 1788 | |
| 1789 | static bool |
| 1790 | msp430_elf_relax_delete_bytes (bfd * abfd, asection * sec, bfd_vma addr, |
| 1791 | int count) |
| 1792 | { |
| 1793 | Elf_Internal_Shdr *symtab_hdr; |
| 1794 | unsigned int sec_shndx; |
| 1795 | bfd_byte *contents; |
| 1796 | Elf_Internal_Rela *irel; |
| 1797 | Elf_Internal_Rela *irelend; |
| 1798 | bfd_vma toaddr; |
| 1799 | Elf_Internal_Sym *isym; |
| 1800 | Elf_Internal_Sym *isymend; |
| 1801 | struct elf_link_hash_entry **sym_hashes; |
| 1802 | struct elf_link_hash_entry **end_hashes; |
| 1803 | unsigned int symcount; |
| 1804 | asection *p; |
| 1805 | |
| 1806 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1807 | |
| 1808 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1809 | |
| 1810 | toaddr = sec->size; |
| 1811 | if (debug_relocs) |
| 1812 | printf (" deleting %d bytes between 0x%lx to 0x%lx\n", |
| 1813 | count, (long) addr, (long) toaddr); |
| 1814 | |
| 1815 | irel = elf_section_data (sec)->relocs; |
| 1816 | irelend = irel + sec->reloc_count; |
| 1817 | |
| 1818 | /* Actually delete the bytes. */ |
| 1819 | memmove (contents + addr, contents + addr + count, |
| 1820 | (size_t) (toaddr - addr - count)); |
| 1821 | sec->size -= count; |
| 1822 | |
| 1823 | /* Adjust all the relocs. */ |
| 1824 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| 1825 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1826 | for (; irel < irelend; irel++) |
| 1827 | { |
| 1828 | /* Get the new reloc address. */ |
| 1829 | if ((irel->r_offset > addr && irel->r_offset < toaddr)) |
| 1830 | irel->r_offset -= count; |
| 1831 | } |
| 1832 | |
| 1833 | for (p = abfd->sections; p != NULL; p = p->next) |
| 1834 | msp430_elf_relax_adjust_locals (abfd,p,addr,count,sec_shndx,toaddr); |
| 1835 | |
| 1836 | /* Adjust the local symbols defined in this section. */ |
| 1837 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| 1838 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1839 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| 1840 | { |
| 1841 | const char * name; |
| 1842 | |
| 1843 | name = bfd_elf_string_from_elf_section |
| 1844 | (abfd, symtab_hdr->sh_link, isym->st_name); |
| 1845 | name = name == NULL || *name == 0 ? bfd_section_name (sec) : name; |
| 1846 | |
| 1847 | if (isym->st_shndx != sec_shndx) |
| 1848 | continue; |
| 1849 | |
| 1850 | if (isym->st_value > addr |
| 1851 | && (isym->st_value < toaddr |
| 1852 | /* We also adjust a symbol at the end of the section if its name is |
| 1853 | on the list below. These symbols are used for debug info |
| 1854 | generation and they refer to the end of the current section, not |
| 1855 | the start of the next section. */ |
| 1856 | || (isym->st_value == toaddr |
| 1857 | && name != NULL |
| 1858 | && (startswith (name, ".Letext") |
| 1859 | || startswith (name, ".LFE"))))) |
| 1860 | { |
| 1861 | if (debug_relocs) |
| 1862 | printf (" adjusting value of local symbol %s from 0x%lx ", |
| 1863 | name, (long) isym->st_value); |
| 1864 | if (isym->st_value < addr + count) |
| 1865 | isym->st_value = addr; |
| 1866 | else |
| 1867 | isym->st_value -= count; |
| 1868 | if (debug_relocs) |
| 1869 | printf ("to 0x%lx\n", (long) isym->st_value); |
| 1870 | } |
| 1871 | /* Adjust the function symbol's size as well. */ |
| 1872 | else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC |
| 1873 | && isym->st_value + isym->st_size > addr |
| 1874 | && isym->st_value + isym->st_size < toaddr) |
| 1875 | isym->st_size -= count; |
| 1876 | } |
| 1877 | |
| 1878 | /* Now adjust the global symbols defined in this section. */ |
| 1879 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 1880 | - symtab_hdr->sh_info); |
| 1881 | sym_hashes = elf_sym_hashes (abfd); |
| 1882 | end_hashes = sym_hashes + symcount; |
| 1883 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 1884 | { |
| 1885 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 1886 | |
| 1887 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 1888 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 1889 | && sym_hash->root.u.def.section == sec |
| 1890 | && sym_hash->root.u.def.value > addr |
| 1891 | && sym_hash->root.u.def.value < toaddr) |
| 1892 | { |
| 1893 | if (sym_hash->root.u.def.value < addr + count) |
| 1894 | sym_hash->root.u.def.value = addr; |
| 1895 | else |
| 1896 | sym_hash->root.u.def.value -= count; |
| 1897 | } |
| 1898 | /* Adjust the function symbol's size as well. */ |
| 1899 | else if (sym_hash->root.type == bfd_link_hash_defined |
| 1900 | && sym_hash->root.u.def.section == sec |
| 1901 | && sym_hash->type == STT_FUNC |
| 1902 | && sym_hash->root.u.def.value + sym_hash->size > addr |
| 1903 | && sym_hash->root.u.def.value + sym_hash->size < toaddr) |
| 1904 | sym_hash->size -= count; |
| 1905 | } |
| 1906 | |
| 1907 | return true; |
| 1908 | } |
| 1909 | |
| 1910 | /* Insert one or two words into a section whilst relaxing. */ |
| 1911 | |
| 1912 | static bfd_byte * |
| 1913 | msp430_elf_relax_add_words (bfd * abfd, asection * sec, bfd_vma addr, |
| 1914 | int num_words, int word1, int word2) |
| 1915 | { |
| 1916 | Elf_Internal_Shdr *symtab_hdr; |
| 1917 | unsigned int sec_shndx; |
| 1918 | bfd_byte *contents; |
| 1919 | Elf_Internal_Rela *irel; |
| 1920 | Elf_Internal_Rela *irelend; |
| 1921 | Elf_Internal_Sym *isym; |
| 1922 | Elf_Internal_Sym *isymend; |
| 1923 | struct elf_link_hash_entry **sym_hashes; |
| 1924 | struct elf_link_hash_entry **end_hashes; |
| 1925 | unsigned int symcount; |
| 1926 | bfd_vma sec_end; |
| 1927 | asection *p; |
| 1928 | if (debug_relocs) |
| 1929 | printf (" adding %d words at 0x%lx\n", num_words, |
| 1930 | (long) (sec->output_section->vma + sec->output_offset + addr)); |
| 1931 | |
| 1932 | contents = elf_section_data (sec)->this_hdr.contents; |
| 1933 | sec_end = sec->size; |
| 1934 | int num_bytes = num_words * 2; |
| 1935 | |
| 1936 | /* Make space for the new words. */ |
| 1937 | contents = bfd_realloc (contents, sec_end + num_bytes); |
| 1938 | memmove (contents + addr + num_bytes, contents + addr, sec_end - addr); |
| 1939 | |
| 1940 | /* Insert the new words. */ |
| 1941 | bfd_put_16 (abfd, word1, contents + addr); |
| 1942 | if (num_words == 2) |
| 1943 | bfd_put_16 (abfd, word2, contents + addr + 2); |
| 1944 | |
| 1945 | /* Update the section information. */ |
| 1946 | sec->size += num_bytes; |
| 1947 | elf_section_data (sec)->this_hdr.contents = contents; |
| 1948 | |
| 1949 | /* Adjust all the relocs. */ |
| 1950 | irel = elf_section_data (sec)->relocs; |
| 1951 | irelend = irel + sec->reloc_count; |
| 1952 | |
| 1953 | for (; irel < irelend; irel++) |
| 1954 | if ((irel->r_offset >= addr && irel->r_offset < sec_end)) |
| 1955 | irel->r_offset += num_bytes; |
| 1956 | |
| 1957 | /* Adjust the local symbols defined in this section. */ |
| 1958 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| 1959 | for (p = abfd->sections; p != NULL; p = p->next) |
| 1960 | msp430_elf_relax_adjust_locals (abfd, p, addr, -num_bytes, |
| 1961 | sec_shndx, sec_end); |
| 1962 | |
| 1963 | /* Adjust the global symbols affected by the move. */ |
| 1964 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| 1965 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 1966 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| 1967 | if (isym->st_shndx == sec_shndx |
| 1968 | && isym->st_value >= addr && isym->st_value < sec_end) |
| 1969 | { |
| 1970 | if (debug_relocs) |
| 1971 | printf (" adjusting value of local symbol %s from 0x%lx to " |
| 1972 | "0x%lx\n", bfd_elf_string_from_elf_section |
| 1973 | (abfd, symtab_hdr->sh_link, isym->st_name), |
| 1974 | (long) isym->st_value, (long)(isym->st_value + num_bytes)); |
| 1975 | isym->st_value += num_bytes; |
| 1976 | } |
| 1977 | |
| 1978 | /* Now adjust the global symbols defined in this section. */ |
| 1979 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| 1980 | - symtab_hdr->sh_info); |
| 1981 | sym_hashes = elf_sym_hashes (abfd); |
| 1982 | end_hashes = sym_hashes + symcount; |
| 1983 | for (; sym_hashes < end_hashes; sym_hashes++) |
| 1984 | { |
| 1985 | struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| 1986 | |
| 1987 | if ((sym_hash->root.type == bfd_link_hash_defined |
| 1988 | || sym_hash->root.type == bfd_link_hash_defweak) |
| 1989 | && sym_hash->root.u.def.section == sec |
| 1990 | && sym_hash->root.u.def.value >= addr |
| 1991 | && sym_hash->root.u.def.value < sec_end) |
| 1992 | sym_hash->root.u.def.value += num_bytes; |
| 1993 | } |
| 1994 | |
| 1995 | return contents; |
| 1996 | } |
| 1997 | |
| 1998 | static bool |
| 1999 | msp430_elf_relax_section (bfd * abfd, asection * sec, |
| 2000 | struct bfd_link_info * link_info, |
| 2001 | bool * again) |
| 2002 | { |
| 2003 | Elf_Internal_Shdr * symtab_hdr; |
| 2004 | Elf_Internal_Rela * internal_relocs; |
| 2005 | Elf_Internal_Rela * irel; |
| 2006 | Elf_Internal_Rela * irelend; |
| 2007 | bfd_byte * contents = NULL; |
| 2008 | Elf_Internal_Sym * isymbuf = NULL; |
| 2009 | |
| 2010 | /* Assume nothing changes. */ |
| 2011 | *again = false; |
| 2012 | |
| 2013 | /* We don't have to do anything for a relocatable link, if |
| 2014 | this section does not have relocs, or if this is not a |
| 2015 | code section. */ |
| 2016 | if (bfd_link_relocatable (link_info) |
| 2017 | || (sec->flags & SEC_RELOC) == 0 |
| 2018 | || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0) |
| 2019 | return true; |
| 2020 | |
| 2021 | if (debug_relocs) |
| 2022 | printf ("Relaxing %s (%p), output_offset: 0x%lx sec size: 0x%lx\n", |
| 2023 | sec->name, sec, (long) sec->output_offset, (long) sec->size); |
| 2024 | |
| 2025 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| 2026 | |
| 2027 | /* Get a copy of the native relocations. */ |
| 2028 | internal_relocs = |
| 2029 | _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory); |
| 2030 | if (internal_relocs == NULL) |
| 2031 | goto error_return; |
| 2032 | |
| 2033 | /* Walk through them looking for relaxing opportunities. */ |
| 2034 | irelend = internal_relocs + sec->reloc_count; |
| 2035 | |
| 2036 | if (debug_relocs) |
| 2037 | printf (" trying code size growing relocs\n"); |
| 2038 | /* Do code size growing relocs first. */ |
| 2039 | for (irel = internal_relocs; irel < irelend; irel++) |
| 2040 | { |
| 2041 | bfd_vma symval; |
| 2042 | |
| 2043 | /* If this isn't something that can be relaxed, then ignore |
| 2044 | this reloc. */ |
| 2045 | if (uses_msp430x_relocs (abfd) |
| 2046 | && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430X_10_PCREL) |
| 2047 | ; |
| 2048 | else if (! uses_msp430x_relocs (abfd) |
| 2049 | && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_10_PCREL) |
| 2050 | ; |
| 2051 | else |
| 2052 | continue; |
| 2053 | |
| 2054 | /* Get the section contents if we haven't done so already. */ |
| 2055 | if (contents == NULL) |
| 2056 | { |
| 2057 | /* Get cached copy if it exists. */ |
| 2058 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 2059 | contents = elf_section_data (sec)->this_hdr.contents; |
| 2060 | else if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 2061 | goto error_return; |
| 2062 | } |
| 2063 | |
| 2064 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 2065 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 2066 | { |
| 2067 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2068 | if (isymbuf == NULL) |
| 2069 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 2070 | symtab_hdr->sh_info, 0, |
| 2071 | NULL, NULL, NULL); |
| 2072 | if (isymbuf == NULL) |
| 2073 | goto error_return; |
| 2074 | } |
| 2075 | |
| 2076 | /* Get the value of the symbol referred to by the reloc. */ |
| 2077 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 2078 | { |
| 2079 | /* A local symbol. */ |
| 2080 | Elf_Internal_Sym *isym; |
| 2081 | asection *sym_sec; |
| 2082 | |
| 2083 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 2084 | if (isym->st_shndx == SHN_UNDEF) |
| 2085 | sym_sec = bfd_und_section_ptr; |
| 2086 | else if (isym->st_shndx == SHN_ABS) |
| 2087 | sym_sec = bfd_abs_section_ptr; |
| 2088 | else if (isym->st_shndx == SHN_COMMON) |
| 2089 | sym_sec = bfd_com_section_ptr; |
| 2090 | else |
| 2091 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 2092 | symval = (isym->st_value |
| 2093 | + sym_sec->output_section->vma + sym_sec->output_offset); |
| 2094 | |
| 2095 | if (debug_relocs) |
| 2096 | printf (" processing reloc at 0x%lx for local sym: %s " |
| 2097 | "st_value: 0x%lx adj value: 0x%lx\n", |
| 2098 | (long) (sec->output_offset + sec->output_section->vma |
| 2099 | + irel->r_offset), |
| 2100 | bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link, |
| 2101 | isym->st_name), |
| 2102 | (long) isym->st_value, (long) symval); |
| 2103 | } |
| 2104 | else |
| 2105 | { |
| 2106 | unsigned long indx; |
| 2107 | struct elf_link_hash_entry *h; |
| 2108 | |
| 2109 | /* An external symbol. */ |
| 2110 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 2111 | h = elf_sym_hashes (abfd)[indx]; |
| 2112 | BFD_ASSERT (h != NULL); |
| 2113 | |
| 2114 | if (h->root.type != bfd_link_hash_defined |
| 2115 | && h->root.type != bfd_link_hash_defweak) |
| 2116 | /* This appears to be a reference to an undefined |
| 2117 | symbol. Just ignore it--it will be caught by the |
| 2118 | regular reloc processing. */ |
| 2119 | continue; |
| 2120 | |
| 2121 | symval = (h->root.u.def.value |
| 2122 | + h->root.u.def.section->output_section->vma |
| 2123 | + h->root.u.def.section->output_offset); |
| 2124 | if (debug_relocs) |
| 2125 | printf (" processing reloc at 0x%lx for global sym: %s " |
| 2126 | "st_value: 0x%lx adj value: 0x%lx\n", |
| 2127 | (long) (sec->output_offset + sec->output_section->vma |
| 2128 | + irel->r_offset), |
| 2129 | h->root.root.string, (long) h->root.u.def.value, |
| 2130 | (long) symval); |
| 2131 | } |
| 2132 | |
| 2133 | /* For simplicity of coding, we are going to modify the section |
| 2134 | contents, the section relocs, and the BFD symbol table. We |
| 2135 | must tell the rest of the code not to free up this |
| 2136 | information. It would be possible to instead create a table |
| 2137 | of changes which have to be made, as is done in coff-mips.c; |
| 2138 | that would be more work, but would require less memory when |
| 2139 | the linker is run. */ |
| 2140 | |
| 2141 | bfd_signed_vma value = symval; |
| 2142 | int opcode; |
| 2143 | |
| 2144 | /* Compute the value that will be relocated. */ |
| 2145 | value += irel->r_addend; |
| 2146 | /* Convert to PC relative. */ |
| 2147 | value -= (sec->output_section->vma + sec->output_offset); |
| 2148 | value -= irel->r_offset; |
| 2149 | value -= 2; |
| 2150 | |
| 2151 | /* Scale. */ |
| 2152 | value >>= 1; |
| 2153 | |
| 2154 | /* If it is in range then no modifications are needed. */ |
| 2155 | if (value >= -512 && value <= 511) |
| 2156 | continue; |
| 2157 | |
| 2158 | /* Get the opcode. */ |
| 2159 | opcode = bfd_get_16 (abfd, contents + irel->r_offset); |
| 2160 | |
| 2161 | /* Compute the new opcode. We are going to convert: |
| 2162 | JMP label |
| 2163 | into: |
| 2164 | BR[A] label |
| 2165 | or |
| 2166 | J<cond> label |
| 2167 | into: |
| 2168 | J<inv-cond> 1f |
| 2169 | BR[A] #label |
| 2170 | 1: */ |
| 2171 | switch (opcode & 0xfc00) |
| 2172 | { |
| 2173 | case 0x3800: opcode = 0x3402; break; /* Jl -> Jge +2 */ |
| 2174 | case 0x3400: opcode = 0x3802; break; /* Jge -> Jl +2 */ |
| 2175 | case 0x2c00: opcode = 0x2802; break; /* Jhs -> Jlo +2 */ |
| 2176 | case 0x2800: opcode = 0x2c02; break; /* Jlo -> Jhs +2 */ |
| 2177 | case 0x2400: opcode = 0x2002; break; /* Jeq -> Jne +2 */ |
| 2178 | case 0x2000: opcode = 0x2402; break; /* jne -> Jeq +2 */ |
| 2179 | case 0x3000: /* jn */ |
| 2180 | /* There is no direct inverse of the Jn insn. |
| 2181 | FIXME: we could do this as: |
| 2182 | Jn 1f |
| 2183 | br 2f |
| 2184 | 1: br label |
| 2185 | 2: */ |
| 2186 | continue; |
| 2187 | case 0x3c00: |
| 2188 | if (uses_msp430x_relocs (abfd)) |
| 2189 | opcode = 0x0080; /* JMP -> BRA */ |
| 2190 | else |
| 2191 | opcode = 0x4030; /* JMP -> BR */ |
| 2192 | break; |
| 2193 | default: |
| 2194 | /* Unhandled branch instruction. */ |
| 2195 | /* fprintf (stderr, "unrecog: %x\n", opcode); */ |
| 2196 | continue; |
| 2197 | } |
| 2198 | |
| 2199 | /* Note that we've changed the relocs, section contents, etc. */ |
| 2200 | elf_section_data (sec)->relocs = internal_relocs; |
| 2201 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2202 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2203 | |
| 2204 | /* Install the new opcode. */ |
| 2205 | bfd_put_16 (abfd, opcode, contents + irel->r_offset); |
| 2206 | |
| 2207 | /* Insert the new branch instruction. */ |
| 2208 | if (uses_msp430x_relocs (abfd)) |
| 2209 | { |
| 2210 | if (debug_relocs) |
| 2211 | printf (" R_MSP430X_10_PCREL -> R_MSP430X_ABS20_ADR_SRC " |
| 2212 | "(growing with new opcode 0x%x)\n", opcode); |
| 2213 | |
| 2214 | /* Insert an absolute branch (aka MOVA) instruction. |
| 2215 | Note that bits 19:16 of the address are stored in the first word |
| 2216 | of the insn, so this is where r_offset will point to. */ |
| 2217 | if (opcode == 0x0080) |
| 2218 | { |
| 2219 | /* If we're inserting a BRA because we are converting from a JMP, |
| 2220 | then only add one word for destination address; the BRA opcode |
| 2221 | has already been written. */ |
| 2222 | contents = msp430_elf_relax_add_words |
| 2223 | (abfd, sec, irel->r_offset + 2, 1, 0x0000, 0); |
| 2224 | } |
| 2225 | else |
| 2226 | { |
| 2227 | contents = msp430_elf_relax_add_words |
| 2228 | (abfd, sec, irel->r_offset + 2, 2, 0x0080, 0x0000); |
| 2229 | /* Update the relocation to point to the inserted branch |
| 2230 | instruction. Note - we are changing a PC-relative reloc |
| 2231 | into an absolute reloc, but this is OK because we have |
| 2232 | arranged with the assembler to have the reloc's value be |
| 2233 | a (local) symbol, not a section+offset value. */ |
| 2234 | irel->r_offset += 2; |
| 2235 | } |
| 2236 | |
| 2237 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2238 | R_MSP430X_ABS20_ADR_SRC); |
| 2239 | } |
| 2240 | else |
| 2241 | { |
| 2242 | if (debug_relocs) |
| 2243 | printf (" R_MSP430_10_PCREL -> R_MSP430_16 " |
| 2244 | "(growing with new opcode 0x%x)\n", opcode); |
| 2245 | if (opcode == 0x4030) |
| 2246 | { |
| 2247 | /* If we're inserting a BR because we are converting from a JMP, |
| 2248 | then only add one word for destination address; the BR opcode |
| 2249 | has already been written. */ |
| 2250 | contents = msp430_elf_relax_add_words |
| 2251 | (abfd, sec, irel->r_offset + 2, 1, 0x0000, 0); |
| 2252 | irel->r_offset += 2; |
| 2253 | } |
| 2254 | else |
| 2255 | { |
| 2256 | contents = msp430_elf_relax_add_words |
| 2257 | (abfd, sec, irel->r_offset + 2, 2, 0x4030, 0x0000); |
| 2258 | /* See comment above about converting a 10-bit PC-rel |
| 2259 | relocation into a 16-bit absolute relocation. */ |
| 2260 | irel->r_offset += 4; |
| 2261 | } |
| 2262 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2263 | R_MSP430_16); |
| 2264 | } |
| 2265 | |
| 2266 | /* Growing the section may mean that other |
| 2267 | conditional branches need to be fixed. */ |
| 2268 | *again = true; |
| 2269 | } |
| 2270 | |
| 2271 | if (debug_relocs) |
| 2272 | printf (" trying code size shrinking relocs\n"); |
| 2273 | |
| 2274 | for (irel = internal_relocs; irel < irelend; irel++) |
| 2275 | { |
| 2276 | bfd_vma symval; |
| 2277 | |
| 2278 | /* Get the section contents if we haven't done so already. */ |
| 2279 | if (contents == NULL) |
| 2280 | { |
| 2281 | /* Get cached copy if it exists. */ |
| 2282 | if (elf_section_data (sec)->this_hdr.contents != NULL) |
| 2283 | contents = elf_section_data (sec)->this_hdr.contents; |
| 2284 | else if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
| 2285 | goto error_return; |
| 2286 | } |
| 2287 | |
| 2288 | /* Read this BFD's local symbols if we haven't done so already. */ |
| 2289 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| 2290 | { |
| 2291 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| 2292 | if (isymbuf == NULL) |
| 2293 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| 2294 | symtab_hdr->sh_info, 0, |
| 2295 | NULL, NULL, NULL); |
| 2296 | if (isymbuf == NULL) |
| 2297 | goto error_return; |
| 2298 | } |
| 2299 | |
| 2300 | /* Get the value of the symbol referred to by the reloc. */ |
| 2301 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| 2302 | { |
| 2303 | /* A local symbol. */ |
| 2304 | Elf_Internal_Sym *isym; |
| 2305 | asection *sym_sec; |
| 2306 | |
| 2307 | isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| 2308 | if (isym->st_shndx == SHN_UNDEF) |
| 2309 | sym_sec = bfd_und_section_ptr; |
| 2310 | else if (isym->st_shndx == SHN_ABS) |
| 2311 | sym_sec = bfd_abs_section_ptr; |
| 2312 | else if (isym->st_shndx == SHN_COMMON) |
| 2313 | sym_sec = bfd_com_section_ptr; |
| 2314 | else |
| 2315 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| 2316 | symval = (isym->st_value |
| 2317 | + sym_sec->output_section->vma + sym_sec->output_offset); |
| 2318 | |
| 2319 | if (debug_relocs) |
| 2320 | printf (" processing reloc at 0x%lx for local sym: %s " |
| 2321 | "st_value: 0x%lx adj value: 0x%lx\n", |
| 2322 | (long) (sec->output_offset + sec->output_section->vma |
| 2323 | + irel->r_offset), |
| 2324 | bfd_elf_string_from_elf_section |
| 2325 | (abfd, symtab_hdr->sh_link, isym->st_name), |
| 2326 | (long) isym->st_value, (long) symval); |
| 2327 | } |
| 2328 | else |
| 2329 | { |
| 2330 | unsigned long indx; |
| 2331 | struct elf_link_hash_entry *h; |
| 2332 | |
| 2333 | /* An external symbol. */ |
| 2334 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| 2335 | h = elf_sym_hashes (abfd)[indx]; |
| 2336 | BFD_ASSERT (h != NULL); |
| 2337 | |
| 2338 | if (h->root.type != bfd_link_hash_defined |
| 2339 | && h->root.type != bfd_link_hash_defweak) |
| 2340 | /* This appears to be a reference to an undefined |
| 2341 | symbol. Just ignore it--it will be caught by the |
| 2342 | regular reloc processing. */ |
| 2343 | continue; |
| 2344 | |
| 2345 | symval = (h->root.u.def.value |
| 2346 | + h->root.u.def.section->output_section->vma |
| 2347 | + h->root.u.def.section->output_offset); |
| 2348 | if (debug_relocs) |
| 2349 | printf (" processing reloc at 0x%lx for global sym: %s " |
| 2350 | "st_value: 0x%lx adj value: 0x%lx\n", (long) |
| 2351 | (sec->output_offset + sec->output_section->vma |
| 2352 | + irel->r_offset), |
| 2353 | h->root.root.string, (long) h->root.u.def.value, |
| 2354 | (long) symval); |
| 2355 | } |
| 2356 | |
| 2357 | /* For simplicity of coding, we are going to modify the section |
| 2358 | contents, the section relocs, and the BFD symbol table. We |
| 2359 | must tell the rest of the code not to free up this |
| 2360 | information. It would be possible to instead create a table |
| 2361 | of changes which have to be made, as is done in coff-mips.c; |
| 2362 | that would be more work, but would require less memory when |
| 2363 | the linker is run. */ |
| 2364 | |
| 2365 | /* Try to turn a 16bit pc-relative branch into a 10bit pc-relative |
| 2366 | branch. */ |
| 2367 | /* Paranoia? paranoia... */ |
| 2368 | if (! uses_msp430x_relocs (abfd) |
| 2369 | && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL) |
| 2370 | { |
| 2371 | bfd_vma value = symval; |
| 2372 | |
| 2373 | /* Deal with pc-relative gunk. */ |
| 2374 | value -= (sec->output_section->vma + sec->output_offset); |
| 2375 | value -= irel->r_offset; |
| 2376 | value += irel->r_addend; |
| 2377 | |
| 2378 | /* See if the value will fit in 10 bits, note the high value is |
| 2379 | 1016 as the target will be two bytes closer if we are |
| 2380 | able to relax. */ |
| 2381 | if ((long) value < 1016 && (long) value > -1016) |
| 2382 | { |
| 2383 | int code0 = 0, code1 = 0, code2 = 0; |
| 2384 | int i; |
| 2385 | struct rcodes_s *rx; |
| 2386 | |
| 2387 | /* Get the opcode. */ |
| 2388 | if (irel->r_offset >= 6) |
| 2389 | code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6); |
| 2390 | |
| 2391 | if (irel->r_offset >= 4) |
| 2392 | code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4); |
| 2393 | |
| 2394 | code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2); |
| 2395 | |
| 2396 | if (code2 != 0x4010) |
| 2397 | continue; |
| 2398 | |
| 2399 | /* Check r4 and r3. */ |
| 2400 | for (i = NUMB_RELAX_CODES - 1; i >= 0; i--) |
| 2401 | { |
| 2402 | rx = &rcode[i]; |
| 2403 | if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1) |
| 2404 | break; |
| 2405 | else if (rx->cdx == 1 && rx->f1 == code1) |
| 2406 | break; |
| 2407 | else if (rx->cdx == 0) /* This is an unconditional jump. */ |
| 2408 | break; |
| 2409 | } |
| 2410 | |
| 2411 | /* Check labels: |
| 2412 | .Label0: ; we do not care about this label |
| 2413 | jeq +6 |
| 2414 | .Label1: ; make sure there is no label here |
| 2415 | jl +4 |
| 2416 | .Label2: ; make sure there is no label here |
| 2417 | br .Label_dst |
| 2418 | |
| 2419 | So, if there is .Label1 or .Label2 we cannot relax this code. |
| 2420 | This actually should not happen, cause for relaxable |
| 2421 | instructions we use RL_PCREL reloc instead of 16_PCREL. |
| 2422 | Will change this in the future. */ |
| 2423 | |
| 2424 | if (rx->cdx > 0 |
| 2425 | && msp430_elf_symbol_address_p (abfd, sec, isymbuf, |
| 2426 | irel->r_offset - 2)) |
| 2427 | continue; |
| 2428 | if (rx->cdx > 1 |
| 2429 | && msp430_elf_symbol_address_p (abfd, sec, isymbuf, |
| 2430 | irel->r_offset - 4)) |
| 2431 | continue; |
| 2432 | |
| 2433 | /* Note that we've changed the relocs, section contents, etc. */ |
| 2434 | elf_section_data (sec)->relocs = internal_relocs; |
| 2435 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2436 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2437 | |
| 2438 | if (debug_relocs) |
| 2439 | printf (" R_MSP430_RL_PCREL -> "); |
| 2440 | /* Fix the relocation's type. */ |
| 2441 | if (uses_msp430x_relocs (abfd)) |
| 2442 | { |
| 2443 | if (rx->labels == 3) /* Handle special cases. */ |
| 2444 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2445 | R_MSP430X_2X_PCREL); |
| 2446 | else |
| 2447 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2448 | R_MSP430X_10_PCREL); |
| 2449 | } |
| 2450 | else |
| 2451 | { |
| 2452 | if (rx->labels == 3) /* Handle special cases. */ |
| 2453 | { |
| 2454 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2455 | R_MSP430_2X_PCREL); |
| 2456 | if (debug_relocs) |
| 2457 | printf ("R_MSP430_2X_PCREL (shrinking with new opcode" |
| 2458 | " 0x%x)\n", rx->t0); |
| 2459 | } |
| 2460 | else |
| 2461 | { |
| 2462 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2463 | R_MSP430_10_PCREL); |
| 2464 | if (debug_relocs) |
| 2465 | printf ("R_MSP430_10_PCREL (shrinking with new opcode" |
| 2466 | " 0x%x)\n", rx->t0); |
| 2467 | } |
| 2468 | } |
| 2469 | |
| 2470 | /* Fix the opcode right way. */ |
| 2471 | bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off); |
| 2472 | if (rx->t1) |
| 2473 | bfd_put_16 (abfd, rx->t1, |
| 2474 | contents + irel->r_offset - rx->off + 2); |
| 2475 | |
| 2476 | /* Delete bytes. */ |
| 2477 | if (!msp430_elf_relax_delete_bytes (abfd, sec, |
| 2478 | irel->r_offset - rx->off + |
| 2479 | rx->ncl, rx->bs)) |
| 2480 | goto error_return; |
| 2481 | |
| 2482 | /* Handle unconditional jumps. */ |
| 2483 | if (rx->cdx == 0) |
| 2484 | irel->r_offset -= 2; |
| 2485 | |
| 2486 | /* That will change things, so, we should relax again. |
| 2487 | Note that this is not required, and it may be slow. */ |
| 2488 | *again = true; |
| 2489 | } |
| 2490 | } |
| 2491 | |
| 2492 | /* Try to turn a 16-bit absolute branch into a 10-bit pc-relative |
| 2493 | branch. */ |
| 2494 | if ((uses_msp430x_relocs (abfd) |
| 2495 | && ELF32_R_TYPE (irel->r_info) == R_MSP430X_ABS16) |
| 2496 | || (! uses_msp430x_relocs (abfd) |
| 2497 | && ELF32_R_TYPE (irel->r_info) == R_MSP430_16)) |
| 2498 | { |
| 2499 | bfd_vma value = symval; |
| 2500 | |
| 2501 | value -= (sec->output_section->vma + sec->output_offset); |
| 2502 | value -= irel->r_offset; |
| 2503 | value += irel->r_addend; |
| 2504 | |
| 2505 | /* See if the value will fit in 10 bits, note the high value is |
| 2506 | 1016 as the target will be two bytes closer if we are |
| 2507 | able to relax. */ |
| 2508 | if ((long) value < 1016 && (long) value > -1016) |
| 2509 | { |
| 2510 | int code1, code2, opcode; |
| 2511 | |
| 2512 | /* Get the opcode. */ |
| 2513 | code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2); |
| 2514 | if (code2 != 0x4030) /* BR -> JMP */ |
| 2515 | continue; |
| 2516 | /* FIXME: check r4 and r3 ? */ |
| 2517 | /* FIXME: Handle 0x4010 as well ? */ |
| 2518 | |
| 2519 | /* Note that we've changed the relocs, section contents, etc. */ |
| 2520 | elf_section_data (sec)->relocs = internal_relocs; |
| 2521 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2522 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2523 | |
| 2524 | /* Fix the relocation's type. */ |
| 2525 | if (uses_msp430x_relocs (abfd)) |
| 2526 | { |
| 2527 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2528 | R_MSP430X_10_PCREL); |
| 2529 | if (debug_relocs) |
| 2530 | printf (" R_MSP430X_16 -> R_MSP430X_10_PCREL "); |
| 2531 | } |
| 2532 | else |
| 2533 | { |
| 2534 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| 2535 | R_MSP430_10_PCREL); |
| 2536 | if (debug_relocs) |
| 2537 | printf (" R_MSP430_16 -> R_MSP430_10_PCREL "); |
| 2538 | } |
| 2539 | /* If we're trying to shrink a BR[A] after previously having |
| 2540 | grown a JMP for this reloc, then we have a sequence like |
| 2541 | this: |
| 2542 | J<cond> 1f |
| 2543 | BR[A] |
| 2544 | 1: |
| 2545 | The opcode for J<cond> has the target hard-coded as 2 words |
| 2546 | ahead of the insn, instead of using a reloc. |
| 2547 | This means we cannot rely on any of the helper functions to |
| 2548 | update this hard-coded jump destination if we remove the |
| 2549 | BR[A] insn, so we must explicitly update it here. |
| 2550 | This does mean that we can remove the entire branch |
| 2551 | instruction, and invert the conditional jump, saving us 4 |
| 2552 | bytes rather than only 2 if we detected this in the normal |
| 2553 | way. */ |
| 2554 | code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4); |
| 2555 | switch (code1) |
| 2556 | { |
| 2557 | case 0x3802: opcode = 0x3401; break; /* Jl +2 -> Jge +1 */ |
| 2558 | case 0x3402: opcode = 0x3801; break; /* Jge +2 -> Jl +1 */ |
| 2559 | case 0x2c02: opcode = 0x2801; break; /* Jhs +2 -> Jlo +1 */ |
| 2560 | case 0x2802: opcode = 0x2c01; break; /* Jlo +2 -> Jhs +1 */ |
| 2561 | case 0x2402: opcode = 0x2001; break; /* Jeq +2 -> Jne +1 */ |
| 2562 | case 0x2002: opcode = 0x2401; break; /* jne +2 -> Jeq +1 */ |
| 2563 | case 0x3002: /* jn +2 */ |
| 2564 | /* FIXME: There is no direct inverse of the Jn insn. */ |
| 2565 | continue; |
| 2566 | default: |
| 2567 | /* The previous opcode does not have a hard-coded jump |
| 2568 | that we added when previously relaxing, so relax the |
| 2569 | current branch as normal. */ |
| 2570 | opcode = 0x3c00; |
| 2571 | break; |
| 2572 | } |
| 2573 | if (debug_relocs) |
| 2574 | printf ("(shrinking with new opcode 0x%x)\n", opcode); |
| 2575 | |
| 2576 | if (opcode != 0x3c00) |
| 2577 | { |
| 2578 | /* Invert the opcode of the conditional jump. */ |
| 2579 | bfd_put_16 (abfd, opcode, contents + irel->r_offset - 4); |
| 2580 | irel->r_offset -= 4; |
| 2581 | |
| 2582 | /* Delete 4 bytes - the full BR insn. */ |
| 2583 | if (!msp430_elf_relax_delete_bytes (abfd, sec, |
| 2584 | irel->r_offset + 2, 4)) |
| 2585 | goto error_return; |
| 2586 | } |
| 2587 | else |
| 2588 | { |
| 2589 | /* Fix the opcode right way. */ |
| 2590 | bfd_put_16 (abfd, opcode, contents + irel->r_offset - 2); |
| 2591 | irel->r_offset -= 2; |
| 2592 | |
| 2593 | /* Delete bytes. */ |
| 2594 | if (!msp430_elf_relax_delete_bytes (abfd, sec, |
| 2595 | irel->r_offset + 2, 2)) |
| 2596 | goto error_return; |
| 2597 | } |
| 2598 | |
| 2599 | /* That will change things, so, we should relax again. |
| 2600 | Note that this is not required, and it may be slow. */ |
| 2601 | *again = true; |
| 2602 | } |
| 2603 | } |
| 2604 | } |
| 2605 | |
| 2606 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) |
| 2607 | { |
| 2608 | if (!link_info->keep_memory) |
| 2609 | free (isymbuf); |
| 2610 | else |
| 2611 | { |
| 2612 | /* Cache the symbols for elf_link_input_bfd. */ |
| 2613 | symtab_hdr->contents = (unsigned char *) isymbuf; |
| 2614 | } |
| 2615 | } |
| 2616 | |
| 2617 | if (contents != NULL |
| 2618 | && elf_section_data (sec)->this_hdr.contents != contents) |
| 2619 | { |
| 2620 | if (!link_info->keep_memory) |
| 2621 | free (contents); |
| 2622 | else |
| 2623 | { |
| 2624 | /* Cache the section contents for elf_link_input_bfd. */ |
| 2625 | elf_section_data (sec)->this_hdr.contents = contents; |
| 2626 | } |
| 2627 | } |
| 2628 | |
| 2629 | if (elf_section_data (sec)->relocs != internal_relocs) |
| 2630 | free (internal_relocs); |
| 2631 | |
| 2632 | return true; |
| 2633 | |
| 2634 | error_return: |
| 2635 | if (symtab_hdr->contents != (unsigned char *) isymbuf) |
| 2636 | free (isymbuf); |
| 2637 | if (elf_section_data (sec)->this_hdr.contents != contents) |
| 2638 | free (contents); |
| 2639 | if (elf_section_data (sec)->relocs != internal_relocs) |
| 2640 | free (internal_relocs); |
| 2641 | |
| 2642 | return false; |
| 2643 | } |
| 2644 | |
| 2645 | /* Handle an MSP430 specific section when reading an object file. |
| 2646 | This is called when bfd_section_from_shdr finds a section with |
| 2647 | an unknown type. */ |
| 2648 | |
| 2649 | static bool |
| 2650 | elf32_msp430_section_from_shdr (bfd *abfd, |
| 2651 | Elf_Internal_Shdr * hdr, |
| 2652 | const char *name, |
| 2653 | int shindex) |
| 2654 | { |
| 2655 | switch (hdr->sh_type) |
| 2656 | { |
| 2657 | case SHT_MSP430_SEC_FLAGS: |
| 2658 | case SHT_MSP430_SYM_ALIASES: |
| 2659 | case SHT_MSP430_ATTRIBUTES: |
| 2660 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex); |
| 2661 | default: |
| 2662 | return false; |
| 2663 | } |
| 2664 | } |
| 2665 | |
| 2666 | static bool |
| 2667 | elf32_msp430_obj_attrs_handle_unknown (bfd *abfd, int tag) |
| 2668 | { |
| 2669 | _bfd_error_handler |
| 2670 | /* xgettext:c-format */ |
| 2671 | (_("warning: %pB: unknown MSPABI object attribute %d"), |
| 2672 | abfd, tag); |
| 2673 | return true; |
| 2674 | } |
| 2675 | |
| 2676 | /* Determine whether an object attribute tag takes an integer, a |
| 2677 | string or both. */ |
| 2678 | |
| 2679 | static int |
| 2680 | elf32_msp430_obj_attrs_arg_type (int tag) |
| 2681 | { |
| 2682 | if (tag == Tag_compatibility) |
| 2683 | return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL; |
| 2684 | |
| 2685 | if (tag < 32) |
| 2686 | return ATTR_TYPE_FLAG_INT_VAL; |
| 2687 | |
| 2688 | return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL; |
| 2689 | } |
| 2690 | |
| 2691 | static inline const char * |
| 2692 | isa_type (int isa) |
| 2693 | { |
| 2694 | switch (isa) |
| 2695 | { |
| 2696 | case 1: return "MSP430"; |
| 2697 | case 2: return "MSP430X"; |
| 2698 | default: return "unknown"; |
| 2699 | } |
| 2700 | } |
| 2701 | |
| 2702 | static inline const char * |
| 2703 | code_model (int model) |
| 2704 | { |
| 2705 | switch (model) |
| 2706 | { |
| 2707 | case 1: return "small"; |
| 2708 | case 2: return "large"; |
| 2709 | default: return "unknown"; |
| 2710 | } |
| 2711 | } |
| 2712 | |
| 2713 | static inline const char * |
| 2714 | data_model (int model) |
| 2715 | { |
| 2716 | switch (model) |
| 2717 | { |
| 2718 | case 1: return "small"; |
| 2719 | case 2: return "large"; |
| 2720 | case 3: return "restricted large"; |
| 2721 | default: return "unknown"; |
| 2722 | } |
| 2723 | } |
| 2724 | |
| 2725 | /* Merge MSPABI and GNU object attributes from IBFD into OBFD. |
| 2726 | Raise an error if there are conflicting attributes. */ |
| 2727 | |
| 2728 | static bool |
| 2729 | elf32_msp430_merge_msp430_attributes (bfd *ibfd, struct bfd_link_info *info) |
| 2730 | { |
| 2731 | bfd *obfd = info->output_bfd; |
| 2732 | obj_attribute *in_msp_attr, *in_gnu_attr; |
| 2733 | obj_attribute *out_msp_attr, *out_gnu_attr; |
| 2734 | bool result = true; |
| 2735 | static bfd * first_input_bfd = NULL; |
| 2736 | |
| 2737 | /* Skip linker created files. */ |
| 2738 | if (ibfd->flags & BFD_LINKER_CREATED) |
| 2739 | return true; |
| 2740 | |
| 2741 | /* LTO can create temporary files for linking which may not have an attribute |
| 2742 | section. */ |
| 2743 | if (ibfd->lto_output |
| 2744 | && bfd_get_section_by_name (ibfd, ".MSP430.attributes") == NULL) |
| 2745 | return true; |
| 2746 | |
| 2747 | /* If this is the first real object just copy the attributes. */ |
| 2748 | if (!elf_known_obj_attributes_proc (obfd)[0].i) |
| 2749 | { |
| 2750 | _bfd_elf_copy_obj_attributes (ibfd, obfd); |
| 2751 | |
| 2752 | out_msp_attr = elf_known_obj_attributes_proc (obfd); |
| 2753 | |
| 2754 | /* Use the Tag_null value to indicate that |
| 2755 | the attributes have been initialized. */ |
| 2756 | out_msp_attr[0].i = 1; |
| 2757 | |
| 2758 | first_input_bfd = ibfd; |
| 2759 | return true; |
| 2760 | } |
| 2761 | |
| 2762 | in_msp_attr = elf_known_obj_attributes_proc (ibfd); |
| 2763 | out_msp_attr = elf_known_obj_attributes_proc (obfd); |
| 2764 | in_gnu_attr = elf_known_obj_attributes (ibfd) [OBJ_ATTR_GNU]; |
| 2765 | out_gnu_attr = elf_known_obj_attributes (obfd) [OBJ_ATTR_GNU]; |
| 2766 | |
| 2767 | /* The ISAs must be the same. */ |
| 2768 | if (in_msp_attr[OFBA_MSPABI_Tag_ISA].i != out_msp_attr[OFBA_MSPABI_Tag_ISA].i) |
| 2769 | { |
| 2770 | _bfd_error_handler |
| 2771 | /* xgettext:c-format */ |
| 2772 | (_("error: %pB uses %s instructions but %pB uses %s"), |
| 2773 | ibfd, isa_type (in_msp_attr[OFBA_MSPABI_Tag_ISA].i), |
| 2774 | first_input_bfd, isa_type (out_msp_attr[OFBA_MSPABI_Tag_ISA].i)); |
| 2775 | result = false; |
| 2776 | } |
| 2777 | |
| 2778 | /* The code models must be the same. */ |
| 2779 | if (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i |
| 2780 | != out_msp_attr[OFBA_MSPABI_Tag_Code_Model].i) |
| 2781 | { |
| 2782 | _bfd_error_handler |
| 2783 | /* xgettext:c-format */ |
| 2784 | (_("error: %pB uses the %s code model whereas %pB uses the %s code model"), |
| 2785 | ibfd, code_model (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i), |
| 2786 | first_input_bfd, |
| 2787 | code_model (out_msp_attr[OFBA_MSPABI_Tag_Code_Model].i)); |
| 2788 | result = false; |
| 2789 | } |
| 2790 | |
| 2791 | /* The large code model is only supported by the MSP430X. */ |
| 2792 | if (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i == 2 |
| 2793 | && out_msp_attr[OFBA_MSPABI_Tag_ISA].i != 2) |
| 2794 | { |
| 2795 | _bfd_error_handler |
| 2796 | /* xgettext:c-format */ |
| 2797 | (_("error: %pB uses the large code model but %pB uses MSP430 instructions"), |
| 2798 | ibfd, first_input_bfd); |
| 2799 | result = false; |
| 2800 | } |
| 2801 | |
| 2802 | /* The data models must be the same. */ |
| 2803 | if (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i |
| 2804 | != out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i) |
| 2805 | { |
| 2806 | _bfd_error_handler |
| 2807 | /* xgettext:c-format */ |
| 2808 | (_("error: %pB uses the %s data model whereas %pB uses the %s data model"), |
| 2809 | ibfd, data_model (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i), |
| 2810 | first_input_bfd, |
| 2811 | data_model (out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i)); |
| 2812 | result = false; |
| 2813 | } |
| 2814 | |
| 2815 | /* The small code model requires the use of the small data model. */ |
| 2816 | if (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i == 1 |
| 2817 | && out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i != 1) |
| 2818 | { |
| 2819 | _bfd_error_handler |
| 2820 | /* xgettext:c-format */ |
| 2821 | (_("error: %pB uses the small code model but %pB uses the %s data model"), |
| 2822 | ibfd, first_input_bfd, |
| 2823 | data_model (out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i)); |
| 2824 | result = false; |
| 2825 | } |
| 2826 | |
| 2827 | /* The large data models are only supported by the MSP430X. */ |
| 2828 | if (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i > 1 |
| 2829 | && out_msp_attr[OFBA_MSPABI_Tag_ISA].i != 2) |
| 2830 | { |
| 2831 | _bfd_error_handler |
| 2832 | /* xgettext:c-format */ |
| 2833 | (_("error: %pB uses the %s data model but %pB only uses MSP430 instructions"), |
| 2834 | ibfd, data_model (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i), |
| 2835 | first_input_bfd); |
| 2836 | result = false; |
| 2837 | } |
| 2838 | |
| 2839 | /* Just ignore the data region unless the large memory model is in use. |
| 2840 | We have already checked that ibfd and obfd use the same memory model. */ |
| 2841 | if ((in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i |
| 2842 | == OFBA_MSPABI_Val_Code_Model_LARGE) |
| 2843 | && (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i |
| 2844 | == OFBA_MSPABI_Val_Data_Model_LARGE)) |
| 2845 | { |
| 2846 | /* We cannot allow "lower region only" to be linked with any other |
| 2847 | values (i.e. ANY or NONE). |
| 2848 | Before this attribute existed, "ANY" region was the default. */ |
| 2849 | bool ibfd_lower_region_used |
| 2850 | = (in_gnu_attr[Tag_GNU_MSP430_Data_Region].i |
| 2851 | == Val_GNU_MSP430_Data_Region_Lower); |
| 2852 | bool obfd_lower_region_used |
| 2853 | = (out_gnu_attr[Tag_GNU_MSP430_Data_Region].i |
| 2854 | == Val_GNU_MSP430_Data_Region_Lower); |
| 2855 | if (ibfd_lower_region_used != obfd_lower_region_used) |
| 2856 | { |
| 2857 | _bfd_error_handler |
| 2858 | (_("error: %pB can use the upper region for data, " |
| 2859 | "but %pB assumes data is exclusively in lower memory"), |
| 2860 | ibfd_lower_region_used ? obfd : ibfd, |
| 2861 | ibfd_lower_region_used ? ibfd : obfd); |
| 2862 | result = false; |
| 2863 | } |
| 2864 | } |
| 2865 | |
| 2866 | return result; |
| 2867 | } |
| 2868 | |
| 2869 | /* Merge backend specific data from an object file to the output |
| 2870 | object file when linking. */ |
| 2871 | |
| 2872 | static bool |
| 2873 | elf32_msp430_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| 2874 | { |
| 2875 | bfd *obfd = info->output_bfd; |
| 2876 | /* Make sure that the machine number reflects the most |
| 2877 | advanced version of the MSP architecture required. */ |
| 2878 | #define max(a,b) ((a) > (b) ? (a) : (b)) |
| 2879 | if (bfd_get_mach (ibfd) != bfd_get_mach (obfd)) |
| 2880 | bfd_default_set_arch_mach (obfd, bfd_get_arch (obfd), |
| 2881 | max (bfd_get_mach (ibfd), bfd_get_mach (obfd))); |
| 2882 | #undef max |
| 2883 | |
| 2884 | return elf32_msp430_merge_msp430_attributes (ibfd, info); |
| 2885 | } |
| 2886 | |
| 2887 | static bool |
| 2888 | msp430_elf_is_target_special_symbol (bfd *abfd, asymbol *sym) |
| 2889 | { |
| 2890 | return _bfd_elf_is_local_label_name (abfd, sym->name); |
| 2891 | } |
| 2892 | |
| 2893 | static bool |
| 2894 | uses_large_model (bfd *abfd) |
| 2895 | { |
| 2896 | obj_attribute * attr; |
| 2897 | |
| 2898 | if (abfd->flags & BFD_LINKER_CREATED) |
| 2899 | return false; |
| 2900 | |
| 2901 | attr = elf_known_obj_attributes_proc (abfd); |
| 2902 | if (attr == NULL) |
| 2903 | return false; |
| 2904 | |
| 2905 | return attr[OFBA_MSPABI_Tag_Code_Model].i == 2; |
| 2906 | } |
| 2907 | |
| 2908 | static unsigned int |
| 2909 | elf32_msp430_eh_frame_address_size (bfd *abfd, |
| 2910 | const asection *sec ATTRIBUTE_UNUSED) |
| 2911 | { |
| 2912 | return uses_large_model (abfd) ? 4 : 2; |
| 2913 | } |
| 2914 | |
| 2915 | /* This is gross. The MSP430 EABI says that (sec 11.5): |
| 2916 | |
| 2917 | "An implementation may choose to use Rel or Rela |
| 2918 | type relocations for other relocations." |
| 2919 | |
| 2920 | But it also says that: |
| 2921 | |
| 2922 | "Certain relocations are identified as Rela only. [snip] |
| 2923 | Where Rela is specified, an implementation must honor |
| 2924 | this requirement." |
| 2925 | |
| 2926 | There is one relocation marked as requiring RELA - R_MSP430_ABS_HI16 - but |
| 2927 | to keep things simple we choose to use RELA relocations throughout. The |
| 2928 | problem is that the TI compiler generates REL relocations, so we have to |
| 2929 | be able to accept those as well. */ |
| 2930 | |
| 2931 | #define elf_backend_may_use_rel_p 1 |
| 2932 | #define elf_backend_may_use_rela_p 1 |
| 2933 | #define elf_backend_default_use_rela_p 1 |
| 2934 | |
| 2935 | #undef elf_backend_obj_attrs_vendor |
| 2936 | #define elf_backend_obj_attrs_vendor "mspabi" |
| 2937 | #undef elf_backend_obj_attrs_section |
| 2938 | #define elf_backend_obj_attrs_section ".MSP430.attributes" |
| 2939 | #undef elf_backend_obj_attrs_section_type |
| 2940 | #define elf_backend_obj_attrs_section_type SHT_MSP430_ATTRIBUTES |
| 2941 | #define elf_backend_section_from_shdr elf32_msp430_section_from_shdr |
| 2942 | #define elf_backend_obj_attrs_handle_unknown elf32_msp430_obj_attrs_handle_unknown |
| 2943 | #undef elf_backend_obj_attrs_arg_type |
| 2944 | #define elf_backend_obj_attrs_arg_type elf32_msp430_obj_attrs_arg_type |
| 2945 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_msp430_merge_private_bfd_data |
| 2946 | #define elf_backend_eh_frame_address_size elf32_msp430_eh_frame_address_size |
| 2947 | |
| 2948 | #define ELF_ARCH bfd_arch_msp430 |
| 2949 | #define ELF_MACHINE_CODE EM_MSP430 |
| 2950 | #define ELF_MACHINE_ALT1 EM_MSP430_OLD |
| 2951 | #define ELF_MAXPAGESIZE 4 |
| 2952 | #define ELF_OSABI ELFOSABI_STANDALONE |
| 2953 | |
| 2954 | #define TARGET_LITTLE_SYM msp430_elf32_vec |
| 2955 | #define TARGET_LITTLE_NAME "elf32-msp430" |
| 2956 | |
| 2957 | #define elf_info_to_howto msp430_info_to_howto_rela |
| 2958 | #define elf_info_to_howto_rel NULL |
| 2959 | #define elf_backend_relocate_section elf32_msp430_relocate_section |
| 2960 | #define elf_backend_check_relocs elf32_msp430_check_relocs |
| 2961 | #define elf_backend_can_gc_sections 1 |
| 2962 | #define elf_backend_final_write_processing bfd_elf_msp430_final_write_processing |
| 2963 | #define elf_backend_object_p elf32_msp430_object_p |
| 2964 | #define bfd_elf32_bfd_relax_section msp430_elf_relax_section |
| 2965 | #define bfd_elf32_bfd_is_target_special_symbol msp430_elf_is_target_special_symbol |
| 2966 | |
| 2967 | #undef elf32_bed |
| 2968 | #define elf32_bed elf32_msp430_bed |
| 2969 | |
| 2970 | #include "elf32-target.h" |
| 2971 | |
| 2972 | /* The TI compiler sets the OSABI field to ELFOSABI_NONE. */ |
| 2973 | #undef TARGET_LITTLE_SYM |
| 2974 | #define TARGET_LITTLE_SYM msp430_elf32_ti_vec |
| 2975 | |
| 2976 | #undef elf32_bed |
| 2977 | #define elf32_bed elf32_msp430_ti_bed |
| 2978 | |
| 2979 | #undef ELF_OSABI |
| 2980 | #define ELF_OSABI ELFOSABI_NONE |
| 2981 | |
| 2982 | static const struct bfd_elf_special_section msp430_ti_elf_special_sections[] = |
| 2983 | { |
| 2984 | /* prefix, prefix_length, suffix_len, type, attributes. */ |
| 2985 | { STRING_COMMA_LEN (".TI.symbol.alias"), 0, SHT_MSP430_SYM_ALIASES, 0 }, |
| 2986 | { STRING_COMMA_LEN (".TI.section.flags"), 0, SHT_MSP430_SEC_FLAGS, 0 }, |
| 2987 | { STRING_COMMA_LEN ("_TI_build_attrib"), 0, SHT_MSP430_ATTRIBUTES, 0 }, |
| 2988 | { NULL, 0, 0, 0, 0 } |
| 2989 | }; |
| 2990 | |
| 2991 | #undef elf_backend_special_sections |
| 2992 | #define elf_backend_special_sections msp430_ti_elf_special_sections |
| 2993 | |
| 2994 | #include "elf32-target.h" |