| 1 | /* BFD back-end for Texas Instruments TMS320C80 Multimedia Video Processor (MVP). |
| 2 | Copyright 1996, 1997, 1999, 2000, 2001 Free Software Foundation, Inc. |
| 3 | |
| 4 | Written by Fred Fish (fnf@cygnus.com) |
| 5 | |
| 6 | There is nothing new under the sun. This file draws a lot on other |
| 7 | coff files. |
| 8 | |
| 9 | This file is part of BFD, the Binary File Descriptor library. |
| 10 | |
| 11 | This program is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License as published by |
| 13 | the Free Software Foundation; either version 2 of the License, or |
| 14 | (at your option) any later version. |
| 15 | |
| 16 | This program is distributed in the hope that it will be useful, |
| 17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | GNU General Public License for more details. |
| 20 | |
| 21 | You should have received a copy of the GNU General Public License |
| 22 | along with this program; if not, write to the Free Software |
| 23 | Foundation, 59 Temple Place - Suite 330, |
| 24 | Boston, MA 02111-1307, USA. */ |
| 25 | |
| 26 | #include "bfd.h" |
| 27 | #include "bfdlink.h" |
| 28 | #include "sysdep.h" |
| 29 | #include "libbfd.h" |
| 30 | #include "coff/tic80.h" |
| 31 | #include "coff/internal.h" |
| 32 | #include "libcoff.h" |
| 33 | |
| 34 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
| 35 | #define COFF_ALIGN_IN_SECTION_HEADER 1 |
| 36 | #define COFF_ALIGN_IN_SFLAGS 1 |
| 37 | |
| 38 | #define GET_SCNHDR_FLAGS H_GET_16 |
| 39 | #define PUT_SCNHDR_FLAGS H_PUT_16 |
| 40 | |
| 41 | static void rtype2howto |
| 42 | PARAMS ((arelent *cache_ptr, struct internal_reloc *dst)); |
| 43 | static bfd_reloc_status_type ppbase_reloc |
| 44 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 45 | static bfd_reloc_status_type glob15_reloc |
| 46 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 47 | static bfd_reloc_status_type glob16_reloc |
| 48 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 49 | static bfd_reloc_status_type local16_reloc |
| 50 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 51 | static boolean coff_tic80_relocate_section |
| 52 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 53 | struct internal_reloc *, struct internal_syment *, asection **)); |
| 54 | static reloc_howto_type * coff_tic80_rtype_to_howto |
| 55 | PARAMS ((bfd *, asection *, struct internal_reloc *, |
| 56 | struct coff_link_hash_entry *, struct internal_syment *, |
| 57 | bfd_vma *)); |
| 58 | |
| 59 | static reloc_howto_type tic80_howto_table[] = |
| 60 | { |
| 61 | |
| 62 | HOWTO (R_RELLONG, /* type */ |
| 63 | 0, /* rightshift */ |
| 64 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 65 | 32, /* bitsize */ |
| 66 | false, /* pc_relative */ |
| 67 | 0, /* bitpos */ |
| 68 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 69 | NULL, /* special_function */ |
| 70 | "RELLONG", /* name */ |
| 71 | true, /* partial_inplace */ |
| 72 | 0xffffffff, /* src_mask */ |
| 73 | 0xffffffff, /* dst_mask */ |
| 74 | false), /* pcrel_offset */ |
| 75 | |
| 76 | HOWTO (R_MPPCR, /* type */ |
| 77 | 2, /* rightshift */ |
| 78 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 79 | 32, /* bitsize */ |
| 80 | true, /* pc_relative */ |
| 81 | 0, /* bitpos */ |
| 82 | complain_overflow_signed, /* complain_on_overflow */ |
| 83 | NULL, /* special_function */ |
| 84 | "MPPCR", /* name */ |
| 85 | true, /* partial_inplace */ |
| 86 | 0xffffffff, /* src_mask */ |
| 87 | 0xffffffff, /* dst_mask */ |
| 88 | true), /* pcrel_offset */ |
| 89 | |
| 90 | HOWTO (R_ABS, /* type */ |
| 91 | 0, /* rightshift */ |
| 92 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 93 | 32, /* bitsize */ |
| 94 | false, /* pc_relative */ |
| 95 | 0, /* bitpos */ |
| 96 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 97 | NULL, /* special_function */ |
| 98 | "ABS", /* name */ |
| 99 | true, /* partial_inplace */ |
| 100 | 0xffffffff, /* src_mask */ |
| 101 | 0xffffffff, /* dst_mask */ |
| 102 | false), /* pcrel_offset */ |
| 103 | |
| 104 | HOWTO (R_PPBASE, /* type */ |
| 105 | 0, /* rightshift */ |
| 106 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 107 | 32, /* bitsize */ |
| 108 | false, /* pc_relative */ |
| 109 | 0, /* bitpos */ |
| 110 | complain_overflow_dont, /* complain_on_overflow */ |
| 111 | ppbase_reloc, /* special_function */ |
| 112 | "PPBASE", /* name */ |
| 113 | true, /* partial_inplace */ |
| 114 | 0xffffffff, /* src_mask */ |
| 115 | 0xffffffff, /* dst_mask */ |
| 116 | false), /* pcrel_offset */ |
| 117 | |
| 118 | HOWTO (R_PPLBASE, /* type */ |
| 119 | 0, /* rightshift */ |
| 120 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 121 | 32, /* bitsize */ |
| 122 | false, /* pc_relative */ |
| 123 | 0, /* bitpos */ |
| 124 | complain_overflow_dont, /* complain_on_overflow */ |
| 125 | ppbase_reloc, /* special_function */ |
| 126 | "PPLBASE", /* name */ |
| 127 | true, /* partial_inplace */ |
| 128 | 0xffffffff, /* src_mask */ |
| 129 | 0xffffffff, /* dst_mask */ |
| 130 | false), /* pcrel_offset */ |
| 131 | |
| 132 | HOWTO (R_PP15, /* type */ |
| 133 | 0, /* rightshift */ |
| 134 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 135 | 15, /* bitsize */ |
| 136 | false, /* pc_relative */ |
| 137 | 6, /* bitpos */ |
| 138 | complain_overflow_dont, /* complain_on_overflow */ |
| 139 | glob15_reloc, /* special_function */ |
| 140 | "PP15", /* name */ |
| 141 | true, /* partial_inplace */ |
| 142 | 0x1ffc0, /* src_mask */ |
| 143 | 0x1ffc0, /* dst_mask */ |
| 144 | false), /* pcrel_offset */ |
| 145 | |
| 146 | HOWTO (R_PP15W, /* type */ |
| 147 | 2, /* rightshift */ |
| 148 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 149 | 15, /* bitsize */ |
| 150 | false, /* pc_relative */ |
| 151 | 6, /* bitpos */ |
| 152 | complain_overflow_dont, /* complain_on_overflow */ |
| 153 | glob15_reloc, /* special_function */ |
| 154 | "PP15W", /* name */ |
| 155 | true, /* partial_inplace */ |
| 156 | 0x1ffc0, /* src_mask */ |
| 157 | 0x1ffc0, /* dst_mask */ |
| 158 | false), /* pcrel_offset */ |
| 159 | |
| 160 | HOWTO (R_PP15H, /* type */ |
| 161 | 1, /* rightshift */ |
| 162 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 163 | 15, /* bitsize */ |
| 164 | false, /* pc_relative */ |
| 165 | 6, /* bitpos */ |
| 166 | complain_overflow_dont, /* complain_on_overflow */ |
| 167 | glob15_reloc, /* special_function */ |
| 168 | "PP15H", /* name */ |
| 169 | true, /* partial_inplace */ |
| 170 | 0x1ffc0, /* src_mask */ |
| 171 | 0x1ffc0, /* dst_mask */ |
| 172 | false), /* pcrel_offset */ |
| 173 | |
| 174 | HOWTO (R_PP16B, /* type */ |
| 175 | 0, /* rightshift */ |
| 176 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 177 | 16, /* bitsize */ |
| 178 | false, /* pc_relative */ |
| 179 | 6, /* bitpos */ |
| 180 | complain_overflow_dont, /* complain_on_overflow */ |
| 181 | glob16_reloc, /* special_function */ |
| 182 | "PP16B", /* name */ |
| 183 | true, /* partial_inplace */ |
| 184 | 0x3ffc0, /* src_mask */ |
| 185 | 0x3ffc0, /* dst_mask */ |
| 186 | false), /* pcrel_offset */ |
| 187 | |
| 188 | HOWTO (R_PPL15, /* type */ |
| 189 | 0, /* rightshift */ |
| 190 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 191 | 15, /* bitsize */ |
| 192 | false, /* pc_relative */ |
| 193 | 0, /* bitpos */ |
| 194 | complain_overflow_dont, /* complain_on_overflow */ |
| 195 | NULL, /* special_function */ |
| 196 | "PPL15", /* name */ |
| 197 | true, /* partial_inplace */ |
| 198 | 0x7fff, /* src_mask */ |
| 199 | 0x7fff, /* dst_mask */ |
| 200 | false), /* pcrel_offset */ |
| 201 | |
| 202 | HOWTO (R_PPL15W, /* type */ |
| 203 | 2, /* rightshift */ |
| 204 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 205 | 15, /* bitsize */ |
| 206 | false, /* pc_relative */ |
| 207 | 0, /* bitpos */ |
| 208 | complain_overflow_dont, /* complain_on_overflow */ |
| 209 | NULL, /* special_function */ |
| 210 | "PPL15W", /* name */ |
| 211 | true, /* partial_inplace */ |
| 212 | 0x7fff, /* src_mask */ |
| 213 | 0x7fff, /* dst_mask */ |
| 214 | false), /* pcrel_offset */ |
| 215 | |
| 216 | HOWTO (R_PPL15H, /* type */ |
| 217 | 1, /* rightshift */ |
| 218 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 219 | 15, /* bitsize */ |
| 220 | false, /* pc_relative */ |
| 221 | 0, /* bitpos */ |
| 222 | complain_overflow_dont, /* complain_on_overflow */ |
| 223 | NULL, /* special_function */ |
| 224 | "PPL15H", /* name */ |
| 225 | true, /* partial_inplace */ |
| 226 | 0x7fff, /* src_mask */ |
| 227 | 0x7fff, /* dst_mask */ |
| 228 | false), /* pcrel_offset */ |
| 229 | |
| 230 | HOWTO (R_PPL16B, /* type */ |
| 231 | 0, /* rightshift */ |
| 232 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 233 | 16, /* bitsize */ |
| 234 | false, /* pc_relative */ |
| 235 | 0, /* bitpos */ |
| 236 | complain_overflow_dont, /* complain_on_overflow */ |
| 237 | local16_reloc, /* special_function */ |
| 238 | "PPL16B", /* name */ |
| 239 | true, /* partial_inplace */ |
| 240 | 0xffff, /* src_mask */ |
| 241 | 0xffff, /* dst_mask */ |
| 242 | false), /* pcrel_offset */ |
| 243 | |
| 244 | HOWTO (R_PPN15, /* type */ |
| 245 | 0, /* rightshift */ |
| 246 | -2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 247 | 15, /* bitsize */ |
| 248 | false, /* pc_relative */ |
| 249 | 6, /* bitpos */ |
| 250 | complain_overflow_dont, /* complain_on_overflow */ |
| 251 | glob15_reloc, /* special_function */ |
| 252 | "PPN15", /* name */ |
| 253 | true, /* partial_inplace */ |
| 254 | 0x1ffc0, /* src_mask */ |
| 255 | 0x1ffc0, /* dst_mask */ |
| 256 | false), /* pcrel_offset */ |
| 257 | |
| 258 | HOWTO (R_PPN15W, /* type */ |
| 259 | 2, /* rightshift */ |
| 260 | -2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 261 | 15, /* bitsize */ |
| 262 | false, /* pc_relative */ |
| 263 | 6, /* bitpos */ |
| 264 | complain_overflow_dont, /* complain_on_overflow */ |
| 265 | glob15_reloc, /* special_function */ |
| 266 | "PPN15W", /* name */ |
| 267 | true, /* partial_inplace */ |
| 268 | 0x1ffc0, /* src_mask */ |
| 269 | 0x1ffc0, /* dst_mask */ |
| 270 | false), /* pcrel_offset */ |
| 271 | |
| 272 | HOWTO (R_PPN15H, /* type */ |
| 273 | 1, /* rightshift */ |
| 274 | -2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 275 | 15, /* bitsize */ |
| 276 | false, /* pc_relative */ |
| 277 | 6, /* bitpos */ |
| 278 | complain_overflow_dont, /* complain_on_overflow */ |
| 279 | glob15_reloc, /* special_function */ |
| 280 | "PPN15H", /* name */ |
| 281 | true, /* partial_inplace */ |
| 282 | 0x1ffc0, /* src_mask */ |
| 283 | 0x1ffc0, /* dst_mask */ |
| 284 | false), /* pcrel_offset */ |
| 285 | |
| 286 | HOWTO (R_PPN16B, /* type */ |
| 287 | 0, /* rightshift */ |
| 288 | -2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 289 | 16, /* bitsize */ |
| 290 | false, /* pc_relative */ |
| 291 | 6, /* bitpos */ |
| 292 | complain_overflow_dont, /* complain_on_overflow */ |
| 293 | glob16_reloc, /* special_function */ |
| 294 | "PPN16B", /* name */ |
| 295 | true, /* partial_inplace */ |
| 296 | 0x3ffc0, /* src_mask */ |
| 297 | 0x3ffc0, /* dst_mask */ |
| 298 | false), /* pcrel_offset */ |
| 299 | |
| 300 | HOWTO (R_PPLN15, /* type */ |
| 301 | 0, /* rightshift */ |
| 302 | -2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 303 | 15, /* bitsize */ |
| 304 | false, /* pc_relative */ |
| 305 | 0, /* bitpos */ |
| 306 | complain_overflow_dont, /* complain_on_overflow */ |
| 307 | NULL, /* special_function */ |
| 308 | "PPLN15", /* name */ |
| 309 | true, /* partial_inplace */ |
| 310 | 0x7fff, /* src_mask */ |
| 311 | 0x7fff, /* dst_mask */ |
| 312 | false), /* pcrel_offset */ |
| 313 | |
| 314 | HOWTO (R_PPLN15W, /* type */ |
| 315 | 2, /* rightshift */ |
| 316 | -2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 317 | 15, /* bitsize */ |
| 318 | false, /* pc_relative */ |
| 319 | 0, /* bitpos */ |
| 320 | complain_overflow_dont, /* complain_on_overflow */ |
| 321 | NULL, /* special_function */ |
| 322 | "PPLN15W", /* name */ |
| 323 | true, /* partial_inplace */ |
| 324 | 0x7fff, /* src_mask */ |
| 325 | 0x7fff, /* dst_mask */ |
| 326 | false), /* pcrel_offset */ |
| 327 | |
| 328 | HOWTO (R_PPLN15H, /* type */ |
| 329 | 1, /* rightshift */ |
| 330 | -2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 331 | 15, /* bitsize */ |
| 332 | false, /* pc_relative */ |
| 333 | 0, /* bitpos */ |
| 334 | complain_overflow_dont, /* complain_on_overflow */ |
| 335 | NULL, /* special_function */ |
| 336 | "PPLN15H", /* name */ |
| 337 | true, /* partial_inplace */ |
| 338 | 0x7fff, /* src_mask */ |
| 339 | 0x7fff, /* dst_mask */ |
| 340 | false), /* pcrel_offset */ |
| 341 | |
| 342 | HOWTO (R_PPLN16B, /* type */ |
| 343 | 0, /* rightshift */ |
| 344 | -2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 345 | 15, /* bitsize */ |
| 346 | false, /* pc_relative */ |
| 347 | 0, /* bitpos */ |
| 348 | complain_overflow_dont, /* complain_on_overflow */ |
| 349 | local16_reloc, /* special_function */ |
| 350 | "PPLN16B", /* name */ |
| 351 | true, /* partial_inplace */ |
| 352 | 0xffff, /* src_mask */ |
| 353 | 0xffff, /* dst_mask */ |
| 354 | false) /* pcrel_offset */ |
| 355 | }; |
| 356 | \f |
| 357 | /* Special relocation functions, used when the output file is not |
| 358 | itself a COFF TIc80 file. */ |
| 359 | |
| 360 | /* This special function is used for the base address type |
| 361 | relocations. */ |
| 362 | |
| 363 | static bfd_reloc_status_type |
| 364 | ppbase_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, |
| 365 | error_message) |
| 366 | bfd *abfd ATTRIBUTE_UNUSED; |
| 367 | arelent *reloc_entry ATTRIBUTE_UNUSED; |
| 368 | asymbol *symbol_in ATTRIBUTE_UNUSED; |
| 369 | PTR data ATTRIBUTE_UNUSED; |
| 370 | asection *input_section ATTRIBUTE_UNUSED; |
| 371 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 372 | char **error_message ATTRIBUTE_UNUSED; |
| 373 | { |
| 374 | /* FIXME. */ |
| 375 | abort (); |
| 376 | } |
| 377 | |
| 378 | /* This special function is used for the global 15 bit relocations. */ |
| 379 | |
| 380 | static bfd_reloc_status_type |
| 381 | glob15_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, |
| 382 | error_message) |
| 383 | bfd *abfd ATTRIBUTE_UNUSED; |
| 384 | arelent *reloc_entry ATTRIBUTE_UNUSED; |
| 385 | asymbol *symbol_in ATTRIBUTE_UNUSED; |
| 386 | PTR data ATTRIBUTE_UNUSED; |
| 387 | asection *input_section ATTRIBUTE_UNUSED; |
| 388 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 389 | char **error_message ATTRIBUTE_UNUSED; |
| 390 | { |
| 391 | /* FIXME. */ |
| 392 | abort (); |
| 393 | } |
| 394 | |
| 395 | /* This special function is used for the global 16 bit relocations. */ |
| 396 | |
| 397 | static bfd_reloc_status_type |
| 398 | glob16_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, |
| 399 | error_message) |
| 400 | bfd *abfd ATTRIBUTE_UNUSED; |
| 401 | arelent *reloc_entry ATTRIBUTE_UNUSED; |
| 402 | asymbol *symbol_in ATTRIBUTE_UNUSED; |
| 403 | PTR data ATTRIBUTE_UNUSED; |
| 404 | asection *input_section ATTRIBUTE_UNUSED; |
| 405 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 406 | char **error_message ATTRIBUTE_UNUSED; |
| 407 | { |
| 408 | /* FIXME. */ |
| 409 | abort (); |
| 410 | } |
| 411 | |
| 412 | /* This special function is used for the local 16 bit relocations. */ |
| 413 | |
| 414 | static bfd_reloc_status_type |
| 415 | local16_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, |
| 416 | error_message) |
| 417 | bfd *abfd ATTRIBUTE_UNUSED; |
| 418 | arelent *reloc_entry ATTRIBUTE_UNUSED; |
| 419 | asymbol *symbol_in ATTRIBUTE_UNUSED; |
| 420 | PTR data ATTRIBUTE_UNUSED; |
| 421 | asection *input_section ATTRIBUTE_UNUSED; |
| 422 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 423 | char **error_message ATTRIBUTE_UNUSED; |
| 424 | { |
| 425 | /* FIXME. */ |
| 426 | abort (); |
| 427 | } |
| 428 | \f |
| 429 | /* Code to turn an external r_type into a pointer to an entry in the howto_table. |
| 430 | If passed an r_type we don't recognize the abort rather than silently failing |
| 431 | to generate an output file. */ |
| 432 | |
| 433 | static void |
| 434 | rtype2howto (cache_ptr, dst) |
| 435 | arelent *cache_ptr; |
| 436 | struct internal_reloc *dst; |
| 437 | { |
| 438 | unsigned int i; |
| 439 | |
| 440 | for (i = 0; i < sizeof tic80_howto_table / sizeof tic80_howto_table[0]; i++) |
| 441 | { |
| 442 | if (tic80_howto_table[i].type == dst->r_type) |
| 443 | { |
| 444 | cache_ptr->howto = tic80_howto_table + i; |
| 445 | return; |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | (*_bfd_error_handler) (_("Unrecognized reloc type 0x%x"), |
| 450 | (unsigned int) dst->r_type); |
| 451 | cache_ptr->howto = tic80_howto_table + 0; |
| 452 | } |
| 453 | |
| 454 | #define RTYPE2HOWTO(cache_ptr, dst) rtype2howto (cache_ptr, dst) |
| 455 | #define coff_rtype_to_howto coff_tic80_rtype_to_howto |
| 456 | |
| 457 | static reloc_howto_type * |
| 458 | coff_tic80_rtype_to_howto (abfd, sec, rel, h, sym, addendp) |
| 459 | bfd *abfd ATTRIBUTE_UNUSED; |
| 460 | asection *sec; |
| 461 | struct internal_reloc *rel; |
| 462 | struct coff_link_hash_entry *h ATTRIBUTE_UNUSED; |
| 463 | struct internal_syment *sym ATTRIBUTE_UNUSED; |
| 464 | bfd_vma *addendp; |
| 465 | { |
| 466 | arelent genrel; |
| 467 | |
| 468 | if (rel -> r_symndx == -1 && addendp != NULL) |
| 469 | { |
| 470 | /* This is a TI "internal relocation", which means that the relocation |
| 471 | amount is the amount by which the current section is being relocated |
| 472 | in the output section. */ |
| 473 | *addendp = (sec -> output_section -> vma + sec -> output_offset) - sec -> vma; |
| 474 | } |
| 475 | RTYPE2HOWTO (&genrel, rel); |
| 476 | return genrel.howto; |
| 477 | } |
| 478 | |
| 479 | #ifndef BADMAG |
| 480 | #define BADMAG(x) TIC80BADMAG(x) |
| 481 | #endif |
| 482 | \f |
| 483 | #define coff_relocate_section coff_tic80_relocate_section |
| 484 | |
| 485 | /* We need a special relocation routine to handle the PP relocs. Most |
| 486 | of this is a copy of _bfd_coff_generic_relocate_section. */ |
| 487 | |
| 488 | static boolean |
| 489 | coff_tic80_relocate_section (output_bfd, info, input_bfd, |
| 490 | input_section, contents, relocs, syms, |
| 491 | sections) |
| 492 | bfd *output_bfd; |
| 493 | struct bfd_link_info *info; |
| 494 | bfd *input_bfd; |
| 495 | asection *input_section; |
| 496 | bfd_byte *contents; |
| 497 | struct internal_reloc *relocs; |
| 498 | struct internal_syment *syms; |
| 499 | asection **sections; |
| 500 | { |
| 501 | struct internal_reloc *rel; |
| 502 | struct internal_reloc *relend; |
| 503 | |
| 504 | rel = relocs; |
| 505 | relend = rel + input_section->reloc_count; |
| 506 | for (; rel < relend; rel++) |
| 507 | { |
| 508 | long symndx; |
| 509 | struct coff_link_hash_entry *h; |
| 510 | struct internal_syment *sym; |
| 511 | bfd_vma addend; |
| 512 | bfd_vma val; |
| 513 | reloc_howto_type *howto; |
| 514 | bfd_reloc_status_type rstat; |
| 515 | bfd_vma addr; |
| 516 | |
| 517 | symndx = rel->r_symndx; |
| 518 | |
| 519 | if (symndx == -1) |
| 520 | { |
| 521 | h = NULL; |
| 522 | sym = NULL; |
| 523 | } |
| 524 | else |
| 525 | { |
| 526 | h = obj_coff_sym_hashes (input_bfd)[symndx]; |
| 527 | sym = syms + symndx; |
| 528 | } |
| 529 | |
| 530 | /* COFF treats common symbols in one of two ways. Either the |
| 531 | size of the symbol is included in the section contents, or it |
| 532 | is not. We assume that the size is not included, and force |
| 533 | the rtype_to_howto function to adjust the addend as needed. */ |
| 534 | |
| 535 | if (sym != NULL && sym->n_scnum != 0) |
| 536 | addend = - sym->n_value; |
| 537 | else |
| 538 | addend = 0; |
| 539 | |
| 540 | howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h, |
| 541 | sym, &addend); |
| 542 | if (howto == NULL) |
| 543 | return false; |
| 544 | |
| 545 | val = 0; |
| 546 | |
| 547 | if (h == NULL) |
| 548 | { |
| 549 | asection *sec; |
| 550 | |
| 551 | if (symndx == -1) |
| 552 | { |
| 553 | sec = bfd_abs_section_ptr; |
| 554 | val = 0; |
| 555 | } |
| 556 | else |
| 557 | { |
| 558 | sec = sections[symndx]; |
| 559 | val = (sec->output_section->vma |
| 560 | + sec->output_offset |
| 561 | + sym->n_value); |
| 562 | if (! obj_pe (output_bfd)) |
| 563 | val -= sec->vma; |
| 564 | } |
| 565 | } |
| 566 | else |
| 567 | { |
| 568 | if (h->root.type == bfd_link_hash_defined |
| 569 | || h->root.type == bfd_link_hash_defweak) |
| 570 | { |
| 571 | asection *sec; |
| 572 | |
| 573 | sec = h->root.u.def.section; |
| 574 | val = (h->root.u.def.value |
| 575 | + sec->output_section->vma |
| 576 | + sec->output_offset); |
| 577 | } |
| 578 | |
| 579 | else if (! info->relocateable) |
| 580 | { |
| 581 | if (! ((*info->callbacks->undefined_symbol) |
| 582 | (info, h->root.root.string, input_bfd, input_section, |
| 583 | rel->r_vaddr - input_section->vma, true))) |
| 584 | return false; |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | addr = rel->r_vaddr - input_section->vma; |
| 589 | |
| 590 | /* FIXME: This code assumes little endian, but the PP can |
| 591 | apparently be bi-endian. I don't know if the bi-endianness |
| 592 | applies to the instruction set or just to the data. */ |
| 593 | switch (howto->type) |
| 594 | { |
| 595 | default: |
| 596 | case R_ABS: |
| 597 | case R_RELLONGX: |
| 598 | case R_PPL15: |
| 599 | case R_PPL15W: |
| 600 | case R_PPL15H: |
| 601 | case R_PPLN15: |
| 602 | case R_PPLN15W: |
| 603 | case R_PPLN15H: |
| 604 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 605 | contents, addr, val, addend); |
| 606 | break; |
| 607 | |
| 608 | case R_PP15: |
| 609 | case R_PP15W: |
| 610 | case R_PP15H: |
| 611 | case R_PPN15: |
| 612 | case R_PPN15W: |
| 613 | case R_PPN15H: |
| 614 | /* Offset the address so that we can use 4 byte relocations. */ |
| 615 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 616 | contents + 2, addr, val, addend); |
| 617 | break; |
| 618 | |
| 619 | case R_PP16B: |
| 620 | case R_PPN16B: |
| 621 | { |
| 622 | /* The most significant bit is stored in bit 6. */ |
| 623 | bfd_byte hold; |
| 624 | |
| 625 | hold = contents[addr + 4]; |
| 626 | contents[addr + 4] &=~ 0x20; |
| 627 | contents[addr + 4] |= (contents[addr] >> 1) & 0x20; |
| 628 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 629 | contents + 2, addr, |
| 630 | val, addend); |
| 631 | contents[addr] &=~ 0x40; |
| 632 | contents[addr] |= (contents[addr + 4] << 1) & 0x40; |
| 633 | contents[addr + 4] &=~ 0x20; |
| 634 | contents[addr + 4] |= hold & 0x20; |
| 635 | break; |
| 636 | } |
| 637 | |
| 638 | case R_PPL16B: |
| 639 | case R_PPLN16B: |
| 640 | { |
| 641 | /* The most significant bit is stored in bit 28. */ |
| 642 | bfd_byte hold; |
| 643 | |
| 644 | hold = contents[addr + 1]; |
| 645 | contents[addr + 1] &=~ 0x80; |
| 646 | contents[addr + 1] |= (contents[addr + 3] << 3) & 0x80; |
| 647 | rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 648 | contents, addr, |
| 649 | val, addend); |
| 650 | contents[addr + 3] &= ~0x10; |
| 651 | contents[addr + 3] |= (contents[addr + 1] >> 3) & 0x10; |
| 652 | contents[addr + 1] &=~ 0x80; |
| 653 | contents[addr + 1] |= hold & 0x80; |
| 654 | break; |
| 655 | } |
| 656 | |
| 657 | case R_PPBASE: |
| 658 | /* Parameter RAM is from 0x1000000 to 0x1000800. */ |
| 659 | contents[addr] &=~ 0x3; |
| 660 | if (val >= 0x1000000 && val < 0x1000800) |
| 661 | contents[addr] |= 0x3; |
| 662 | else |
| 663 | contents[addr] |= 0x2; |
| 664 | rstat = bfd_reloc_ok; |
| 665 | break; |
| 666 | |
| 667 | case R_PPLBASE: |
| 668 | /* Parameter RAM is from 0x1000000 to 0x1000800. */ |
| 669 | contents[addr + 2] &= ~0xc0; |
| 670 | if (val >= 0x1000000 && val < 0x1000800) |
| 671 | contents[addr + 2] |= 0xc0; |
| 672 | else |
| 673 | contents[addr + 2] |= 0x80; |
| 674 | rstat = bfd_reloc_ok; |
| 675 | break; |
| 676 | } |
| 677 | |
| 678 | switch (rstat) |
| 679 | { |
| 680 | default: |
| 681 | abort (); |
| 682 | case bfd_reloc_ok: |
| 683 | break; |
| 684 | case bfd_reloc_outofrange: |
| 685 | (*_bfd_error_handler) |
| 686 | (_("%s: bad reloc address 0x%lx in section `%s'"), |
| 687 | bfd_get_filename (input_bfd), |
| 688 | (unsigned long) rel->r_vaddr, |
| 689 | bfd_get_section_name (input_bfd, input_section)); |
| 690 | return false; |
| 691 | case bfd_reloc_overflow: |
| 692 | { |
| 693 | const char *name; |
| 694 | char buf[SYMNMLEN + 1]; |
| 695 | |
| 696 | if (symndx == -1) |
| 697 | name = "*ABS*"; |
| 698 | else if (h != NULL) |
| 699 | name = h->root.root.string; |
| 700 | else |
| 701 | { |
| 702 | name = _bfd_coff_internal_syment_name (input_bfd, sym, buf); |
| 703 | if (name == NULL) |
| 704 | return false; |
| 705 | } |
| 706 | |
| 707 | if (! ((*info->callbacks->reloc_overflow) |
| 708 | (info, name, howto->name, (bfd_vma) 0, input_bfd, |
| 709 | input_section, rel->r_vaddr - input_section->vma))) |
| 710 | return false; |
| 711 | } |
| 712 | } |
| 713 | } |
| 714 | return true; |
| 715 | } |
| 716 | \f |
| 717 | #define TIC80COFF 1 /* Customize coffcode.h */ |
| 718 | #undef C_AUTOARG /* Clashes with TIc80's C_UEXT */ |
| 719 | #undef C_LASTENT /* Clashes with TIc80's C_STATLAB */ |
| 720 | #include "coffcode.h" |
| 721 | |
| 722 | CREATE_LITTLE_COFF_TARGET_VEC (tic80coff_vec, "coff-tic80", D_PAGED, 0, '_', NULL) |