| 1 | /* tc-ft32.c -- Assemble code for ft32 |
| 2 | Copyright (C) 2008-2018 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GAS, the GNU Assembler. |
| 5 | |
| 6 | GAS is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GAS is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GAS; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
| 19 | Boston, MA 02110-1301, USA. */ |
| 20 | |
| 21 | /* Contributed by Anthony Green <green@spindazzle.org>. */ |
| 22 | |
| 23 | #include "as.h" |
| 24 | #include "safe-ctype.h" |
| 25 | #include "opcode/ft32.h" |
| 26 | |
| 27 | extern const ft32_opc_info_t ft32_opc_info[128]; |
| 28 | |
| 29 | /* See md_parse_option() for meanings of these options. */ |
| 30 | static char norelax; /* True if -norelax switch seen. */ |
| 31 | |
| 32 | const char comment_chars[] = "#"; |
| 33 | const char line_separator_chars[] = ";"; |
| 34 | const char line_comment_chars[] = "#"; |
| 35 | |
| 36 | static int pending_reloc; |
| 37 | static struct hash_control *opcode_hash_control; |
| 38 | |
| 39 | static valueT md_chars_to_number (char * buf, int n); |
| 40 | |
| 41 | const pseudo_typeS md_pseudo_table[] = |
| 42 | { |
| 43 | {0, 0, 0} |
| 44 | }; |
| 45 | |
| 46 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; |
| 47 | const char EXP_CHARS[] = "eE"; |
| 48 | |
| 49 | /* This function is called once, at assembler startup time. It sets |
| 50 | up the hash table with all the opcodes in it, and also initializes |
| 51 | some aliases for compatibility with other assemblers. */ |
| 52 | |
| 53 | void |
| 54 | md_begin (void) |
| 55 | { |
| 56 | const ft32_opc_info_t *opcode; |
| 57 | opcode_hash_control = hash_new (); |
| 58 | |
| 59 | /* Insert names into hash table. */ |
| 60 | for (opcode = ft32_opc_info; opcode->name; opcode++) |
| 61 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); |
| 62 | |
| 63 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, 0); |
| 64 | if (!norelax) |
| 65 | linkrelax = 1; |
| 66 | } |
| 67 | |
| 68 | /* Parse an expression and then restore the input line pointer. */ |
| 69 | |
| 70 | static char * |
| 71 | parse_exp_save_ilp (char *s, expressionS *op) |
| 72 | { |
| 73 | char *save = input_line_pointer; |
| 74 | |
| 75 | input_line_pointer = s; |
| 76 | expression (op); |
| 77 | s = input_line_pointer; |
| 78 | input_line_pointer = save; |
| 79 | return s; |
| 80 | } |
| 81 | |
| 82 | static int |
| 83 | parse_condition (char **ptr) |
| 84 | { |
| 85 | char *s = *ptr; |
| 86 | static const struct |
| 87 | { |
| 88 | const char *name; |
| 89 | int bits; |
| 90 | } |
| 91 | ccs[] = |
| 92 | { |
| 93 | { "gt," , (2 << FT32_FLD_CR_BIT) | (5 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, |
| 94 | { "gte," , (2 << FT32_FLD_CR_BIT) | (4 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, |
| 95 | { "lt," , (2 << FT32_FLD_CR_BIT) | (4 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, |
| 96 | { "lte," , (2 << FT32_FLD_CR_BIT) | (5 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, |
| 97 | { "a," , (2 << FT32_FLD_CR_BIT) | (6 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, |
| 98 | { "ae," , (2 << FT32_FLD_CR_BIT) | (1 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, |
| 99 | { "be," , (2 << FT32_FLD_CR_BIT) | (6 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, |
| 100 | { "b," , (2 << FT32_FLD_CR_BIT) | (1 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, |
| 101 | { "nz," , (2 << FT32_FLD_CR_BIT) | (0 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, |
| 102 | { "z," , (2 << FT32_FLD_CR_BIT) | (0 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, |
| 103 | { "nc," , (2 << FT32_FLD_CR_BIT) | (1 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, |
| 104 | { "c," , (2 << FT32_FLD_CR_BIT) | (1 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, |
| 105 | { "no," , (2 << FT32_FLD_CR_BIT) | (2 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, |
| 106 | { "o," , (2 << FT32_FLD_CR_BIT) | (2 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, |
| 107 | { "ns," , (2 << FT32_FLD_CR_BIT) | (3 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, |
| 108 | { "s," , (2 << FT32_FLD_CR_BIT) | (3 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, |
| 109 | { NULL, 0} |
| 110 | }, *pc; |
| 111 | |
| 112 | for (pc = ccs; pc->name; pc++) |
| 113 | { |
| 114 | if (memcmp(pc->name, s, strlen(pc->name)) == 0) |
| 115 | { |
| 116 | *ptr += strlen(pc->name) - 1; |
| 117 | return pc->bits; |
| 118 | } |
| 119 | } |
| 120 | return -1; |
| 121 | } |
| 122 | |
| 123 | static int |
| 124 | parse_decimal (char **ptr) |
| 125 | { |
| 126 | int r = 0; |
| 127 | char *s = *ptr; |
| 128 | |
| 129 | while (('0' <= *s) && (*s <= '9')) |
| 130 | { |
| 131 | r *= 10; |
| 132 | r += (*s++ - '0'); |
| 133 | } |
| 134 | *ptr = s; |
| 135 | return r; |
| 136 | } |
| 137 | |
| 138 | static int |
| 139 | parse_register_operand (char **ptr) |
| 140 | { |
| 141 | int reg; |
| 142 | char *s = *ptr; |
| 143 | |
| 144 | if (*s != '$') |
| 145 | { |
| 146 | as_bad (_("expecting register")); |
| 147 | ignore_rest_of_line (); |
| 148 | return -1; |
| 149 | } |
| 150 | if ((s[1] == 's') && (s[2] == 'p')) |
| 151 | { |
| 152 | reg = 31; |
| 153 | } |
| 154 | else if ((s[1] == 'c') && (s[2] == 'c')) |
| 155 | { |
| 156 | reg = 30; |
| 157 | } |
| 158 | else if ((s[1] == 'f') && (s[2] == 'p')) |
| 159 | { |
| 160 | reg = 29; |
| 161 | } |
| 162 | else if (s[1] == 'r') |
| 163 | { |
| 164 | reg = s[2] - '0'; |
| 165 | if ((reg < 0) || (reg > 9)) |
| 166 | { |
| 167 | as_bad (_("illegal register number")); |
| 168 | ignore_rest_of_line (); |
| 169 | return -1; |
| 170 | } |
| 171 | if ((reg == 1) || (reg == 2) || (reg == 3)) |
| 172 | { |
| 173 | int r2 = s[3] - '0'; |
| 174 | if ((r2 >= 0) && (r2 <= 9)) |
| 175 | { |
| 176 | reg = (reg * 10) + r2; |
| 177 | *ptr += 1; |
| 178 | } |
| 179 | } |
| 180 | } |
| 181 | else |
| 182 | { |
| 183 | as_bad (_("illegal register number")); |
| 184 | ignore_rest_of_line (); |
| 185 | return -1; |
| 186 | } |
| 187 | |
| 188 | *ptr += 3; |
| 189 | |
| 190 | return reg; |
| 191 | } |
| 192 | |
| 193 | /* This is the guts of the machine-dependent assembler. STR points to |
| 194 | a machine dependent instruction. This function is supposed to emit |
| 195 | the frags/bytes it assembles to. */ |
| 196 | |
| 197 | void |
| 198 | md_assemble (char *str) |
| 199 | { |
| 200 | char *op_start; |
| 201 | char *op_end; |
| 202 | ft32_opc_info_t *opcode; |
| 203 | char *output; |
| 204 | int idx = 0; |
| 205 | char pend; |
| 206 | int nlen = 0; |
| 207 | unsigned int b; |
| 208 | int f; |
| 209 | expressionS arg; |
| 210 | bfd_boolean fixed = FALSE; |
| 211 | unsigned int sc; |
| 212 | bfd_boolean can_sc; |
| 213 | |
| 214 | /* Drop leading whitespace. */ |
| 215 | while (*str == ' ') |
| 216 | str++; |
| 217 | |
| 218 | /* Find the op code end. */ |
| 219 | op_start = str; |
| 220 | for (op_end = str; |
| 221 | *op_end |
| 222 | && !is_end_of_line[*op_end & 0xff] |
| 223 | && *op_end != ' ' |
| 224 | && *op_end != '.'; |
| 225 | op_end++) |
| 226 | nlen++; |
| 227 | |
| 228 | pend = *op_end; |
| 229 | *op_end = 0; |
| 230 | |
| 231 | if (nlen == 0) |
| 232 | as_bad (_("can't find opcode ")); |
| 233 | |
| 234 | opcode = (ft32_opc_info_t *) hash_find (opcode_hash_control, op_start); |
| 235 | *op_end = pend; |
| 236 | |
| 237 | if (opcode == NULL) |
| 238 | { |
| 239 | as_bad (_("unknown opcode %s"), op_start); |
| 240 | return; |
| 241 | } |
| 242 | |
| 243 | b = opcode->bits; |
| 244 | f = opcode->fields; |
| 245 | |
| 246 | if (opcode->dw) |
| 247 | { |
| 248 | int dw; |
| 249 | |
| 250 | if (*op_end == '.') |
| 251 | { |
| 252 | switch (op_end[1]) |
| 253 | { |
| 254 | case 'b': |
| 255 | dw = 0; |
| 256 | break; |
| 257 | case 's': |
| 258 | dw = 1; |
| 259 | break; |
| 260 | case 'l': |
| 261 | dw = 2; |
| 262 | break; |
| 263 | default: |
| 264 | as_bad (_("unknown width specifier '.%c'"), op_end[1]); |
| 265 | return; |
| 266 | } |
| 267 | op_end += 2; |
| 268 | } |
| 269 | else |
| 270 | { |
| 271 | dw = 2; /* default is ".l" */ |
| 272 | } |
| 273 | b |= dw << FT32_FLD_DW_BIT; |
| 274 | } |
| 275 | |
| 276 | while (ISSPACE (*op_end)) |
| 277 | op_end++; |
| 278 | |
| 279 | output = frag_more (4); |
| 280 | |
| 281 | while (f) |
| 282 | { |
| 283 | int lobit = f & -f; |
| 284 | |
| 285 | if (f & lobit) |
| 286 | { |
| 287 | switch (lobit) |
| 288 | { |
| 289 | case FT32_FLD_CBCRCV: |
| 290 | b |= parse_condition( &op_end); |
| 291 | break; |
| 292 | case FT32_FLD_CB: |
| 293 | b |= parse_decimal (&op_end) << FT32_FLD_CB_BIT; |
| 294 | break; |
| 295 | case FT32_FLD_R_D: |
| 296 | b |= parse_register_operand (&op_end) << FT32_FLD_R_D_BIT; |
| 297 | break; |
| 298 | case FT32_FLD_CR: |
| 299 | b |= (parse_register_operand (&op_end) - 28) << FT32_FLD_CR_BIT; |
| 300 | break; |
| 301 | case FT32_FLD_CV: |
| 302 | b |= parse_decimal (&op_end) << FT32_FLD_CV_BIT; |
| 303 | break; |
| 304 | case FT32_FLD_R_1: |
| 305 | b |= parse_register_operand (&op_end) << FT32_FLD_R_1_BIT; |
| 306 | break; |
| 307 | case FT32_FLD_RIMM: |
| 308 | if (*op_end == '$') |
| 309 | { |
| 310 | b |= parse_register_operand (&op_end) << FT32_FLD_RIMM_BIT; |
| 311 | } |
| 312 | else |
| 313 | { |
| 314 | b |= 0x400 << FT32_FLD_RIMM_BIT; |
| 315 | op_end = parse_exp_save_ilp (op_end, &arg); |
| 316 | fixed = TRUE; |
| 317 | fix_new_exp (frag_now, |
| 318 | (output - frag_now->fr_literal), |
| 319 | 2, |
| 320 | &arg, |
| 321 | 0, |
| 322 | BFD_RELOC_FT32_10); |
| 323 | } |
| 324 | break; |
| 325 | case FT32_FLD_R_2: |
| 326 | b |= parse_register_operand (&op_end) << FT32_FLD_R_2_BIT; |
| 327 | break; |
| 328 | case FT32_FLD_K20: |
| 329 | op_end = parse_exp_save_ilp (op_end, &arg); |
| 330 | fixed = TRUE; |
| 331 | fix_new_exp (frag_now, |
| 332 | (output - frag_now->fr_literal), |
| 333 | 3, |
| 334 | &arg, |
| 335 | 0, |
| 336 | BFD_RELOC_FT32_20); |
| 337 | break; |
| 338 | case FT32_FLD_PA: |
| 339 | op_end = parse_exp_save_ilp (op_end, &arg); |
| 340 | fixed = TRUE; |
| 341 | fix_new_exp (frag_now, |
| 342 | (output - frag_now->fr_literal), |
| 343 | 3, |
| 344 | &arg, |
| 345 | 0, |
| 346 | BFD_RELOC_FT32_18); |
| 347 | break; |
| 348 | case FT32_FLD_AA: |
| 349 | op_end = parse_exp_save_ilp (op_end, &arg); |
| 350 | fixed = TRUE; |
| 351 | fix_new_exp (frag_now, |
| 352 | (output - frag_now->fr_literal), |
| 353 | 3, |
| 354 | &arg, |
| 355 | 0, |
| 356 | BFD_RELOC_FT32_17); |
| 357 | break; |
| 358 | case FT32_FLD_K16: |
| 359 | op_end = parse_exp_save_ilp (op_end, &arg); |
| 360 | fixed = TRUE; |
| 361 | fix_new_exp (frag_now, |
| 362 | (output - frag_now->fr_literal), |
| 363 | 2, |
| 364 | &arg, |
| 365 | 0, |
| 366 | BFD_RELOC_16); |
| 367 | break; |
| 368 | case FT32_FLD_K15: |
| 369 | op_end = parse_exp_save_ilp (op_end, &arg); |
| 370 | if (arg.X_add_number & 0x80) |
| 371 | arg.X_add_number ^= 0x7f00; |
| 372 | fixed = TRUE; |
| 373 | fix_new_exp (frag_now, |
| 374 | (output - frag_now->fr_literal), |
| 375 | 2, |
| 376 | &arg, |
| 377 | 0, |
| 378 | BFD_RELOC_FT32_15); |
| 379 | break; |
| 380 | case FT32_FLD_R_D_POST: |
| 381 | b |= parse_register_operand (&op_end) << FT32_FLD_R_D_BIT; |
| 382 | break; |
| 383 | case FT32_FLD_R_1_POST: |
| 384 | b |= parse_register_operand (&op_end) << FT32_FLD_R_1_BIT; |
| 385 | break; |
| 386 | default: |
| 387 | as_bad (_("internal error in argument parsing")); |
| 388 | break; |
| 389 | } |
| 390 | |
| 391 | f &= ~lobit; |
| 392 | |
| 393 | if (f) |
| 394 | { |
| 395 | while (ISSPACE (*op_end)) |
| 396 | op_end++; |
| 397 | |
| 398 | if (*op_end != ',') |
| 399 | { |
| 400 | as_bad (_("expected comma separator")); |
| 401 | ignore_rest_of_line (); |
| 402 | } |
| 403 | |
| 404 | op_end++; |
| 405 | while (ISSPACE (*op_end)) |
| 406 | op_end++; |
| 407 | } |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | if (*op_end != 0) |
| 412 | as_warn (_("extra stuff on line ignored")); |
| 413 | |
| 414 | can_sc = ft32_shortcode (b, &sc); |
| 415 | |
| 416 | if (!fixed && can_sc) |
| 417 | { |
| 418 | arg.X_op = O_constant; |
| 419 | arg.X_add_number = 0; |
| 420 | arg.X_add_symbol = NULL; |
| 421 | arg.X_op_symbol = NULL; |
| 422 | fix_new_exp (frag_now, |
| 423 | (output - frag_now->fr_literal), |
| 424 | 2, |
| 425 | &arg, |
| 426 | 0, |
| 427 | BFD_RELOC_FT32_RELAX); |
| 428 | } |
| 429 | |
| 430 | output[idx++] = 0xff & (b >> 0); |
| 431 | output[idx++] = 0xff & (b >> 8); |
| 432 | output[idx++] = 0xff & (b >> 16); |
| 433 | output[idx++] = 0xff & (b >> 24); |
| 434 | |
| 435 | dwarf2_emit_insn (4); |
| 436 | |
| 437 | while (ISSPACE (*op_end)) |
| 438 | op_end++; |
| 439 | |
| 440 | if (*op_end != 0) |
| 441 | as_warn ("extra stuff on line ignored"); |
| 442 | |
| 443 | if (pending_reloc) |
| 444 | as_bad ("Something forgot to clean up\n"); |
| 445 | } |
| 446 | |
| 447 | /* Turn a string in input_line_pointer into a floating point constant |
| 448 | of type type, and store the appropriate bytes in *LITP. The number |
| 449 | of LITTLENUMS emitted is stored in *SIZEP . An error message is |
| 450 | returned, or NULL on OK. */ |
| 451 | |
| 452 | const char * |
| 453 | md_atof (int type, char *litP, int *sizeP) |
| 454 | { |
| 455 | int prec; |
| 456 | LITTLENUM_TYPE words[4]; |
| 457 | char *t; |
| 458 | int i; |
| 459 | |
| 460 | switch (type) |
| 461 | { |
| 462 | case 'f': |
| 463 | prec = 2; |
| 464 | break; |
| 465 | |
| 466 | case 'd': |
| 467 | prec = 4; |
| 468 | break; |
| 469 | |
| 470 | default: |
| 471 | *sizeP = 0; |
| 472 | return _("bad call to md_atof"); |
| 473 | } |
| 474 | |
| 475 | t = atof_ieee (input_line_pointer, type, words); |
| 476 | if (t) |
| 477 | input_line_pointer = t; |
| 478 | |
| 479 | *sizeP = prec * 2; |
| 480 | |
| 481 | for (i = prec - 1; i >= 0; i--) |
| 482 | { |
| 483 | md_number_to_chars (litP, (valueT) words[i], 2); |
| 484 | litP += 2; |
| 485 | } |
| 486 | |
| 487 | return NULL; |
| 488 | } |
| 489 | \f |
| 490 | const char *md_shortopts = ""; |
| 491 | |
| 492 | struct option md_longopts[] = |
| 493 | { |
| 494 | #define OPTION_NORELAX (OPTION_MD_BASE) |
| 495 | {"norelax", no_argument, NULL, OPTION_NORELAX}, |
| 496 | {"no-relax", no_argument, NULL, OPTION_NORELAX}, |
| 497 | {NULL, no_argument, NULL, 0} |
| 498 | }; |
| 499 | size_t md_longopts_size = sizeof (md_longopts); |
| 500 | |
| 501 | /* We have no target specific options yet, so these next |
| 502 | two functions are empty. */ |
| 503 | int |
| 504 | md_parse_option (int c ATTRIBUTE_UNUSED, const char *arg ATTRIBUTE_UNUSED) |
| 505 | { |
| 506 | switch (c) |
| 507 | { |
| 508 | case OPTION_NORELAX: |
| 509 | norelax = 1; |
| 510 | break; |
| 511 | |
| 512 | default: |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | return 1; |
| 517 | } |
| 518 | |
| 519 | void |
| 520 | md_show_usage (FILE *stream ATTRIBUTE_UNUSED) |
| 521 | { |
| 522 | fprintf (stream, _("FT32 options:\n")); |
| 523 | fprintf (stream, _("\n\ |
| 524 | -no-relax don't relax relocations\n\ |
| 525 | \n")); |
| 526 | } |
| 527 | |
| 528 | /* Convert from target byte order to host byte order. */ |
| 529 | |
| 530 | static valueT |
| 531 | md_chars_to_number (char * buf, int n) |
| 532 | { |
| 533 | valueT result = 0; |
| 534 | unsigned char * where = (unsigned char *) buf; |
| 535 | |
| 536 | while (n--) |
| 537 | { |
| 538 | result <<= 8; |
| 539 | result |= (where[n] & 255); |
| 540 | } |
| 541 | |
| 542 | return result; |
| 543 | } |
| 544 | |
| 545 | /* Apply a fixup to the object file. */ |
| 546 | |
| 547 | void |
| 548 | md_apply_fix (fixS *fixP ATTRIBUTE_UNUSED, |
| 549 | valueT * valP ATTRIBUTE_UNUSED, segT seg ATTRIBUTE_UNUSED) |
| 550 | { |
| 551 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; |
| 552 | long val = *valP; |
| 553 | long newval; |
| 554 | |
| 555 | if (linkrelax && fixP->fx_subsy) |
| 556 | { |
| 557 | /* For a subtraction relocation expression, generate one |
| 558 | of the DIFF relocs, with the value being the difference. |
| 559 | Note that a sym1 - sym2 expression is adjusted into a |
| 560 | section_start_sym + sym4_offset_from_section_start - sym1 |
| 561 | expression. fixP->fx_addsy holds the section start symbol, |
| 562 | fixP->fx_offset holds sym2's offset, and fixP->fx_subsy |
| 563 | holds sym1. Calculate the current difference and write value, |
| 564 | but leave fx_offset as is - during relaxation, |
| 565 | fx_offset - value gives sym1's value. */ |
| 566 | |
| 567 | switch (fixP->fx_r_type) |
| 568 | { |
| 569 | case BFD_RELOC_32: |
| 570 | fixP->fx_r_type = BFD_RELOC_FT32_DIFF32; |
| 571 | break; |
| 572 | default: |
| 573 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 574 | _("expression too complex")); |
| 575 | break; |
| 576 | } |
| 577 | |
| 578 | val = S_GET_VALUE (fixP->fx_addsy) + |
| 579 | fixP->fx_offset - S_GET_VALUE (fixP->fx_subsy); |
| 580 | *valP = val; |
| 581 | |
| 582 | fixP->fx_subsy = NULL; |
| 583 | } |
| 584 | |
| 585 | /* We don't actually support subtracting a symbol. */ |
| 586 | if (fixP->fx_subsy != (symbolS *) NULL) |
| 587 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); |
| 588 | |
| 589 | switch (fixP->fx_r_type) |
| 590 | { |
| 591 | case BFD_RELOC_FT32_DIFF32: |
| 592 | case BFD_RELOC_32: |
| 593 | buf[3] = val >> 24; |
| 594 | buf[2] = val >> 16; |
| 595 | buf[1] = val >> 8; |
| 596 | buf[0] = val >> 0; |
| 597 | break; |
| 598 | |
| 599 | case BFD_RELOC_16: |
| 600 | buf[1] = val >> 8; |
| 601 | buf[0] = val >> 0; |
| 602 | break; |
| 603 | |
| 604 | case BFD_RELOC_8: |
| 605 | *buf = val; |
| 606 | break; |
| 607 | |
| 608 | case BFD_RELOC_FT32_10: |
| 609 | if (!val) |
| 610 | break; |
| 611 | newval = md_chars_to_number (buf, 2); |
| 612 | newval |= (val & ((1 << 10) - 1)) << FT32_FLD_RIMM_BIT; |
| 613 | md_number_to_chars (buf, newval, 2); |
| 614 | break; |
| 615 | |
| 616 | case BFD_RELOC_FT32_20: |
| 617 | if (!val) |
| 618 | break; |
| 619 | newval = md_chars_to_number (buf, 3); |
| 620 | newval |= val & ((1 << 20) - 1); |
| 621 | md_number_to_chars (buf, newval, 3); |
| 622 | break; |
| 623 | |
| 624 | case BFD_RELOC_FT32_15: |
| 625 | if (!val) |
| 626 | break; |
| 627 | newval = md_chars_to_number (buf, 2); |
| 628 | newval |= val & ((1 << 15) - 1); |
| 629 | md_number_to_chars (buf, newval, 2); |
| 630 | break; |
| 631 | |
| 632 | case BFD_RELOC_FT32_17: |
| 633 | if (!val) |
| 634 | break; |
| 635 | newval = md_chars_to_number (buf, 3); |
| 636 | newval |= val & ((1 << 17) - 1); |
| 637 | md_number_to_chars (buf, newval, 3); |
| 638 | break; |
| 639 | |
| 640 | case BFD_RELOC_FT32_18: |
| 641 | if (!val) |
| 642 | break; |
| 643 | newval = md_chars_to_number (buf, 4); |
| 644 | newval |= (val >> 2) & ((1 << 18) - 1); |
| 645 | md_number_to_chars (buf, newval, 4); |
| 646 | break; |
| 647 | |
| 648 | case BFD_RELOC_FT32_RELAX: |
| 649 | break; |
| 650 | |
| 651 | default: |
| 652 | abort (); |
| 653 | } |
| 654 | |
| 655 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) |
| 656 | fixP->fx_done = 1; |
| 657 | } |
| 658 | |
| 659 | void |
| 660 | md_number_to_chars (char *ptr, valueT use, int nbytes) |
| 661 | { |
| 662 | number_to_chars_littleendian (ptr, use, nbytes); |
| 663 | } |
| 664 | |
| 665 | /* Generate a machine-dependent relocation. */ |
| 666 | |
| 667 | arelent * |
| 668 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixP) |
| 669 | { |
| 670 | arelent *relP; |
| 671 | bfd_reloc_code_real_type code; |
| 672 | |
| 673 | switch (fixP->fx_r_type) |
| 674 | { |
| 675 | case BFD_RELOC_32: |
| 676 | case BFD_RELOC_16: |
| 677 | case BFD_RELOC_8: |
| 678 | case BFD_RELOC_FT32_10: |
| 679 | case BFD_RELOC_FT32_20: |
| 680 | case BFD_RELOC_FT32_15: |
| 681 | case BFD_RELOC_FT32_17: |
| 682 | case BFD_RELOC_FT32_18: |
| 683 | case BFD_RELOC_FT32_RELAX: |
| 684 | case BFD_RELOC_FT32_DIFF32: |
| 685 | code = fixP->fx_r_type; |
| 686 | break; |
| 687 | default: |
| 688 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 689 | _("Semantics error. This type of operand can not be " |
| 690 | "relocated, it must be an assembly-time constant")); |
| 691 | return NULL; |
| 692 | } |
| 693 | |
| 694 | relP = XNEW (arelent); |
| 695 | gas_assert (relP != 0); |
| 696 | relP->sym_ptr_ptr = XNEW (asymbol *); |
| 697 | *relP->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); |
| 698 | relP->address = fixP->fx_frag->fr_address + fixP->fx_where; |
| 699 | |
| 700 | relP->addend = fixP->fx_offset; |
| 701 | |
| 702 | relP->howto = bfd_reloc_type_lookup (stdoutput, code); |
| 703 | if (! relP->howto) |
| 704 | { |
| 705 | const char *name; |
| 706 | |
| 707 | name = S_GET_NAME (fixP->fx_addsy); |
| 708 | if (name == NULL) |
| 709 | name = _("<unknown>"); |
| 710 | as_fatal (_("Cannot generate relocation type for symbol %s, code %s"), |
| 711 | name, bfd_get_reloc_code_name (code)); |
| 712 | } |
| 713 | |
| 714 | return relP; |
| 715 | } |
| 716 | |
| 717 | /* TC_FORCE_RELOCATION hook */ |
| 718 | |
| 719 | static bfd_boolean |
| 720 | relaxable_section (asection *sec) |
| 721 | { |
| 722 | return ((sec->flags & SEC_DEBUGGING) == 0 |
| 723 | && (sec->flags & SEC_CODE) != 0 |
| 724 | && (sec->flags & SEC_ALLOC) != 0); |
| 725 | } |
| 726 | |
| 727 | /* Does whatever the xtensa port does. */ |
| 728 | |
| 729 | int |
| 730 | ft32_validate_fix_sub (fixS *fix) |
| 731 | { |
| 732 | segT add_symbol_segment, sub_symbol_segment; |
| 733 | |
| 734 | /* The difference of two symbols should be resolved by the assembler when |
| 735 | linkrelax is not set. If the linker may relax the section containing |
| 736 | the symbols, then an Xtensa DIFF relocation must be generated so that |
| 737 | the linker knows to adjust the difference value. */ |
| 738 | if (!linkrelax || fix->fx_addsy == NULL) |
| 739 | return 0; |
| 740 | |
| 741 | /* Make sure both symbols are in the same segment, and that segment is |
| 742 | "normal" and relaxable. If the segment is not "normal", then the |
| 743 | fix is not valid. If the segment is not "relaxable", then the fix |
| 744 | should have been handled earlier. */ |
| 745 | add_symbol_segment = S_GET_SEGMENT (fix->fx_addsy); |
| 746 | if (! SEG_NORMAL (add_symbol_segment) || |
| 747 | ! relaxable_section (add_symbol_segment)) |
| 748 | return 0; |
| 749 | |
| 750 | sub_symbol_segment = S_GET_SEGMENT (fix->fx_subsy); |
| 751 | return (sub_symbol_segment == add_symbol_segment); |
| 752 | } |
| 753 | |
| 754 | /* TC_FORCE_RELOCATION hook */ |
| 755 | |
| 756 | /* If linkrelax is turned on, and the symbol to relocate |
| 757 | against is in a relaxable segment, don't compute the value - |
| 758 | generate a relocation instead. */ |
| 759 | |
| 760 | int |
| 761 | ft32_force_relocation (fixS *fix) |
| 762 | { |
| 763 | if (linkrelax && fix->fx_addsy |
| 764 | && relaxable_section (S_GET_SEGMENT (fix->fx_addsy))) |
| 765 | { |
| 766 | return 1; |
| 767 | } |
| 768 | |
| 769 | return generic_force_reloc (fix); |
| 770 | } |
| 771 | |
| 772 | bfd_boolean |
| 773 | ft32_allow_local_subtract (expressionS * left, |
| 774 | expressionS * right, |
| 775 | segT section) |
| 776 | { |
| 777 | /* If we are not in relaxation mode, subtraction is OK. */ |
| 778 | if (!linkrelax) |
| 779 | return TRUE; |
| 780 | |
| 781 | /* If the symbols are not in a code section then they are OK. */ |
| 782 | if ((section->flags & SEC_CODE) == 0) |
| 783 | return TRUE; |
| 784 | |
| 785 | if (left->X_add_symbol == right->X_add_symbol) |
| 786 | return TRUE; |
| 787 | |
| 788 | /* We have to assume that there may be instructions between the |
| 789 | two symbols and that relaxation may increase the distance between |
| 790 | them. */ |
| 791 | return FALSE; |
| 792 | } |