| 1 | /* tc-w65.c -- Assemble code for the W65816 |
| 2 | Copyright 1995, 1998, 2000, 2001 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 2, 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 the Free |
| 18 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 19 | 02111-1307, USA. */ |
| 20 | |
| 21 | /* Written By Steve Chamberlain <sac@cygnus.com>. */ |
| 22 | |
| 23 | #include <stdio.h> |
| 24 | #include "as.h" |
| 25 | #include "bfd.h" |
| 26 | #include "subsegs.h" |
| 27 | #define DEFINE_TABLE |
| 28 | #include "../opcodes/w65-opc.h" |
| 29 | |
| 30 | const char comment_chars[] = "!"; |
| 31 | CONST char line_separator_chars[] = ";"; |
| 32 | const char line_comment_chars[] = "!#"; |
| 33 | |
| 34 | /* This table describes all the machine specific pseudo-ops the assembler |
| 35 | has to support. The fields are: |
| 36 | |
| 37 | pseudo-op name without dot |
| 38 | function to call to execute this pseudo-op |
| 39 | Integer arg to pass to the function */ |
| 40 | |
| 41 | #define OP_BCC 0x90 |
| 42 | #define OP_BCS 0xB0 |
| 43 | #define OP_BEQ 0xF0 |
| 44 | #define OP_BMI 0x30 |
| 45 | #define OP_BNE 0xD0 |
| 46 | #define OP_BPL 0x10 |
| 47 | #define OP_BRA 0x80 |
| 48 | #define OP_BRL 0x82 |
| 49 | #define OP_BVC 0x50 |
| 50 | #define OP_BVS 0x70 |
| 51 | |
| 52 | void s_longa (); |
| 53 | |
| 54 | const pseudo_typeS md_pseudo_table[] = { |
| 55 | {"int", cons, 2}, |
| 56 | {"word", cons, 2}, |
| 57 | {"longa", s_longa, 0}, |
| 58 | {"longi", s_longa, 1}, |
| 59 | {0, 0, 0} |
| 60 | }; |
| 61 | |
| 62 | void cons (); |
| 63 | void s_align_bytes (); |
| 64 | |
| 65 | #if 0 |
| 66 | int md_reloc_size; |
| 67 | #endif |
| 68 | |
| 69 | static int relax; /* set if -relax seen */ |
| 70 | |
| 71 | const char EXP_CHARS[] = "eE"; |
| 72 | |
| 73 | /* Chars that mean this number is a floating point constant. */ |
| 74 | /* As in 0f12.456 */ |
| 75 | /* or 0d1.2345e12 */ |
| 76 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; |
| 77 | |
| 78 | /* Opcode mnemonics */ |
| 79 | static struct hash_control *opcode_hash_control; |
| 80 | |
| 81 | int M; /* M flag */ |
| 82 | int X; /* X flag */ |
| 83 | |
| 84 | #define C(a,b) ENCODE_RELAX(a,b) |
| 85 | #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) |
| 86 | |
| 87 | #define GET_WHAT(x) ((x>>2)) |
| 88 | |
| 89 | #define BYTE_DISP 1 |
| 90 | #define WORD_DISP 2 |
| 91 | #define UNDEF_BYTE_DISP 0 |
| 92 | #define UNDEF_WORD_DISP 3 |
| 93 | |
| 94 | #define COND_BRANCH 1 |
| 95 | #define UNCOND_BRANCH 2 |
| 96 | #define END 3 |
| 97 | |
| 98 | #define BYTE_F 127 /* How far we can branch forwards */ |
| 99 | #define BYTE_B -126 /* How far we can branch backwards */ |
| 100 | #define WORD_F 32767 |
| 101 | #define WORD_B 32768 |
| 102 | |
| 103 | relax_typeS md_relax_table[C (END, 0)] = { |
| 104 | { 0, 0, 0, 0 }, |
| 105 | { 0, 0, 0, 0 }, |
| 106 | { 0, 0, 0, 0 }, |
| 107 | { 0, 0, 0, 0 }, |
| 108 | |
| 109 | /* COND_BRANCH */ |
| 110 | { 0, 0, 0, 0 }, /* UNDEF_BYTE_DISP */ |
| 111 | { BYTE_F, BYTE_B, 2, C (COND_BRANCH, WORD_DISP) }, /* BYTE_DISP */ |
| 112 | { WORD_F, WORD_B, 5, 0 }, /* WORD_DISP */ |
| 113 | { 0, 0, 5, 0 }, /* UNDEF_WORD_DISP */ |
| 114 | |
| 115 | /* UNCOND_BRANCH */ |
| 116 | { 0, 0, 0, 0 }, /* UNDEF_BYTE_DISP */ |
| 117 | { BYTE_F, BYTE_B, 2, C (UNCOND_BRANCH, WORD_DISP) }, /* BYTE_DISP */ |
| 118 | { WORD_F, WORD_B, 3, 0 }, /* WORD_DISP */ |
| 119 | { 0, 0, 3, 0 } /* UNDEF_WORD_DISP */ |
| 120 | |
| 121 | }; |
| 122 | |
| 123 | /* This function is called once, at assembler startup time. This |
| 124 | should set up all the tables, etc that the MD part of the assembler |
| 125 | needs. */ |
| 126 | |
| 127 | void |
| 128 | s_longa (xmode) |
| 129 | { |
| 130 | int *p = xmode ? &X : &M; |
| 131 | while (*input_line_pointer == ' ') |
| 132 | input_line_pointer++; |
| 133 | if (strncmp (input_line_pointer, "on", 2) == 0) |
| 134 | { |
| 135 | input_line_pointer += 2; |
| 136 | *p = 0; |
| 137 | } |
| 138 | else if (strncmp (input_line_pointer, "off", 3) == 0) |
| 139 | { |
| 140 | *p = 1; |
| 141 | input_line_pointer += 3; |
| 142 | } |
| 143 | else |
| 144 | as_bad (_("need on or off.")); |
| 145 | demand_empty_rest_of_line (); |
| 146 | } |
| 147 | |
| 148 | void |
| 149 | md_begin () |
| 150 | { |
| 151 | struct opinfo *opcode; |
| 152 | char *prev_name = ""; |
| 153 | |
| 154 | opcode_hash_control = hash_new (); |
| 155 | |
| 156 | /* Insert unique names into hash table. */ |
| 157 | for (opcode = optable; opcode->name; opcode++) |
| 158 | { |
| 159 | if (strcmp (prev_name, opcode->name)) |
| 160 | { |
| 161 | prev_name = opcode->name; |
| 162 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); |
| 163 | } |
| 164 | else |
| 165 | { |
| 166 | /* Make all the opcodes with the same name point to the same |
| 167 | string. */ |
| 168 | opcode->name = prev_name; |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | flag_signed_overflow_ok = 1; |
| 173 | } |
| 174 | |
| 175 | static expressionS immediate; /* absolute expression */ |
| 176 | static expressionS immediate1; /* absolute expression */ |
| 177 | |
| 178 | static symbolS * |
| 179 | dot () |
| 180 | { |
| 181 | const char *fake; |
| 182 | |
| 183 | /* JF: '.' is pseudo symbol with value of current location |
| 184 | in current segment. */ |
| 185 | fake = FAKE_LABEL_NAME; |
| 186 | return symbol_new (fake, |
| 187 | now_seg, |
| 188 | (valueT) frag_now_fix (), |
| 189 | frag_now); |
| 190 | |
| 191 | } |
| 192 | |
| 193 | int expr_size; |
| 194 | int expr_shift; |
| 195 | int tc_cons_reloc; |
| 196 | |
| 197 | void |
| 198 | w65_expression (dest, bytes) |
| 199 | expressionS *dest; |
| 200 | unsigned int bytes; |
| 201 | { |
| 202 | expr_size = 0; |
| 203 | expr_shift = 0; |
| 204 | tc_cons_reloc = 0; |
| 205 | while (*input_line_pointer == ' ') |
| 206 | input_line_pointer++; |
| 207 | |
| 208 | if (*input_line_pointer == '<') |
| 209 | { |
| 210 | expr_size = 1; |
| 211 | input_line_pointer++; |
| 212 | } |
| 213 | else if (*input_line_pointer == '>') |
| 214 | { |
| 215 | expr_shift = 1; |
| 216 | input_line_pointer++; |
| 217 | } |
| 218 | else if (*input_line_pointer == '^') |
| 219 | { |
| 220 | expr_shift = 2; |
| 221 | input_line_pointer++; |
| 222 | } |
| 223 | |
| 224 | expr (0, dest); |
| 225 | } |
| 226 | |
| 227 | int amode; |
| 228 | |
| 229 | static char * |
| 230 | parse_exp (s, bytes) |
| 231 | char *s; |
| 232 | int bytes; |
| 233 | { |
| 234 | char *save; |
| 235 | char *new; |
| 236 | |
| 237 | save = input_line_pointer; |
| 238 | input_line_pointer = s; |
| 239 | w65_expression (&immediate, bytes); |
| 240 | if (immediate.X_op == O_absent) |
| 241 | as_bad (_("missing operand")); |
| 242 | new = input_line_pointer; |
| 243 | input_line_pointer = save; |
| 244 | return new; |
| 245 | } |
| 246 | |
| 247 | static char * |
| 248 | get_operands (info, ptr) |
| 249 | struct opinfo *info; |
| 250 | char *ptr; |
| 251 | { |
| 252 | register int override_len = 0; |
| 253 | register int bytes = 0; |
| 254 | |
| 255 | while (*ptr == ' ') |
| 256 | ptr++; |
| 257 | |
| 258 | if (ptr[0] == '#') |
| 259 | { |
| 260 | ptr++; |
| 261 | switch (info->amode) |
| 262 | { |
| 263 | case ADDR_IMMTOI: |
| 264 | bytes = X ? 1 : 2; |
| 265 | amode = ADDR_IMMTOI; |
| 266 | break; |
| 267 | case ADDR_IMMTOA: |
| 268 | bytes = M ? 1 : 2; |
| 269 | amode = ADDR_IMMTOA; |
| 270 | break; |
| 271 | case ADDR_IMMCOP: |
| 272 | bytes = 1; |
| 273 | amode = ADDR_IMMCOP; |
| 274 | break; |
| 275 | case ADDR_DIR: |
| 276 | bytes = 2; |
| 277 | amode = ADDR_ABS; |
| 278 | break; |
| 279 | default: |
| 280 | abort (); |
| 281 | break; |
| 282 | } |
| 283 | ptr = parse_exp (ptr); |
| 284 | } |
| 285 | else if (ptr[0] == '!') |
| 286 | { |
| 287 | ptr = parse_exp (ptr + 1); |
| 288 | if (ptr[0] == ',') |
| 289 | { |
| 290 | if (ptr[1] == 'y') |
| 291 | { |
| 292 | amode = ADDR_ABS_IDX_Y; |
| 293 | bytes = 2; |
| 294 | ptr += 2; |
| 295 | } |
| 296 | else if (ptr[1] == 'x') |
| 297 | { |
| 298 | amode = ADDR_ABS_IDX_X; |
| 299 | bytes = 2; |
| 300 | ptr += 2; |
| 301 | } |
| 302 | else |
| 303 | { |
| 304 | as_bad (_("syntax error after <exp")); |
| 305 | } |
| 306 | } |
| 307 | else |
| 308 | { |
| 309 | amode = ADDR_ABS; |
| 310 | bytes = 2; |
| 311 | } |
| 312 | } |
| 313 | else if (ptr[0] == '>') |
| 314 | { |
| 315 | ptr = parse_exp (ptr + 1); |
| 316 | if (ptr[0] == ',' && ptr[1] == 'x') |
| 317 | { |
| 318 | amode = ADDR_ABS_LONG_IDX_X; |
| 319 | bytes = 3; |
| 320 | ptr += 2; |
| 321 | } |
| 322 | else |
| 323 | { |
| 324 | amode = ADDR_ABS_LONG; |
| 325 | bytes = 3; |
| 326 | } |
| 327 | } |
| 328 | else if (ptr[0] == '<') |
| 329 | { |
| 330 | ptr = parse_exp (ptr + 1); |
| 331 | if (ptr[0] == ',') |
| 332 | { |
| 333 | if (ptr[1] == 'y') |
| 334 | { |
| 335 | amode = ADDR_DIR_IDX_Y; |
| 336 | ptr += 2; |
| 337 | bytes = 2; |
| 338 | } |
| 339 | else if (ptr[1] == 'x') |
| 340 | { |
| 341 | amode = ADDR_DIR_IDX_X; |
| 342 | ptr += 2; |
| 343 | bytes = 2; |
| 344 | } |
| 345 | else |
| 346 | { |
| 347 | as_bad (_("syntax error after <exp")); |
| 348 | } |
| 349 | } |
| 350 | else |
| 351 | { |
| 352 | amode = ADDR_DIR; |
| 353 | bytes = 1; |
| 354 | } |
| 355 | } |
| 356 | else if (ptr[0] == 'a') |
| 357 | { |
| 358 | amode = ADDR_ACC; |
| 359 | } |
| 360 | else if (ptr[0] == '(') |
| 361 | { |
| 362 | /* Look for (exp),y |
| 363 | (<exp),y |
| 364 | (exp,x) |
| 365 | (<exp,x) |
| 366 | (exp) |
| 367 | (!exp) |
| 368 | (exp) |
| 369 | (<exp) |
| 370 | (exp,x) |
| 371 | (!exp,x) |
| 372 | (exp,s) |
| 373 | (exp,s),y */ |
| 374 | |
| 375 | ptr++; |
| 376 | if (ptr[0] == '<') |
| 377 | { |
| 378 | override_len = 1; |
| 379 | ptr++; |
| 380 | } |
| 381 | else if (ptr[0] == '!') |
| 382 | { |
| 383 | override_len = 2; |
| 384 | ptr++; |
| 385 | } |
| 386 | else if (ptr[0] == '>') |
| 387 | { |
| 388 | override_len = 3; |
| 389 | ptr++; |
| 390 | } |
| 391 | else |
| 392 | { |
| 393 | override_len = 0; |
| 394 | } |
| 395 | ptr = parse_exp (ptr); |
| 396 | |
| 397 | if (ptr[0] == ',') |
| 398 | { |
| 399 | ptr++; |
| 400 | if (ptr[0] == 'x' && ptr[1] == ')') |
| 401 | { |
| 402 | ptr += 2; |
| 403 | |
| 404 | if (override_len == 1) |
| 405 | { |
| 406 | amode = ADDR_DIR_IDX_IND_X; |
| 407 | bytes = 2; |
| 408 | } |
| 409 | else |
| 410 | { |
| 411 | amode = ADDR_ABS_IND_IDX; |
| 412 | bytes = 2; |
| 413 | } |
| 414 | } |
| 415 | else if (ptr[0] == 's' && ptr[1] == ')' |
| 416 | && ptr[2] == ',' && ptr[3] == 'y') |
| 417 | { |
| 418 | amode = ADDR_STACK_REL_INDX_IDX; |
| 419 | bytes = 1; |
| 420 | ptr += 4; |
| 421 | } |
| 422 | } |
| 423 | else if (ptr[0] == ')') |
| 424 | { |
| 425 | if (ptr[1] == ',' && ptr[2] == 'y') |
| 426 | { |
| 427 | amode = ADDR_DIR_IND_IDX_Y; |
| 428 | ptr += 3; |
| 429 | bytes = 2; |
| 430 | } |
| 431 | else |
| 432 | { |
| 433 | if (override_len == 1) |
| 434 | { |
| 435 | amode = ADDR_DIR_IND; |
| 436 | bytes = 1; |
| 437 | } |
| 438 | else |
| 439 | { |
| 440 | amode = ADDR_ABS_IND; |
| 441 | bytes = 2; |
| 442 | } |
| 443 | ptr++; |
| 444 | |
| 445 | } |
| 446 | } |
| 447 | } |
| 448 | else if (ptr[0] == '[') |
| 449 | { |
| 450 | ptr = parse_exp (ptr + 1); |
| 451 | if (ptr[0] == ']') |
| 452 | { |
| 453 | ptr++; |
| 454 | if (ptr[0] == ',' && ptr[1] == 'y') |
| 455 | { |
| 456 | bytes = 1; |
| 457 | amode = ADDR_DIR_IND_IDX_Y_LONG; |
| 458 | ptr += 2; |
| 459 | } |
| 460 | else |
| 461 | { |
| 462 | if (info->code == O_jmp) |
| 463 | { |
| 464 | bytes = 2; |
| 465 | amode = ADDR_ABS_IND_LONG; |
| 466 | } |
| 467 | else |
| 468 | { |
| 469 | bytes = 1; |
| 470 | amode = ADDR_DIR_IND_LONG; |
| 471 | } |
| 472 | } |
| 473 | } |
| 474 | } |
| 475 | else |
| 476 | { |
| 477 | ptr = parse_exp (ptr, 2); |
| 478 | if (ptr[0] == ',') |
| 479 | { |
| 480 | if (ptr[1] == 'y') |
| 481 | { |
| 482 | if (override_len == 1) |
| 483 | { |
| 484 | bytes = 1; |
| 485 | amode = ADDR_DIR_IDX_Y; |
| 486 | } |
| 487 | else |
| 488 | { |
| 489 | amode = ADDR_ABS_IDX_Y; |
| 490 | bytes = 2; |
| 491 | } |
| 492 | ptr += 2; |
| 493 | } |
| 494 | else if (ptr[1] == 'x') |
| 495 | { |
| 496 | if (override_len == 1) |
| 497 | { |
| 498 | amode = ADDR_DIR_IDX_X; |
| 499 | bytes = 1; |
| 500 | } |
| 501 | else |
| 502 | { |
| 503 | amode = ADDR_ABS_IDX_X; |
| 504 | bytes = 2; |
| 505 | } |
| 506 | ptr += 2; |
| 507 | } |
| 508 | else if (ptr[1] == 's') |
| 509 | { |
| 510 | bytes = 1; |
| 511 | amode = ADDR_STACK_REL; |
| 512 | ptr += 2; |
| 513 | } |
| 514 | else |
| 515 | { |
| 516 | bytes = 1; |
| 517 | immediate1 = immediate; |
| 518 | ptr = parse_exp (ptr + 1); |
| 519 | amode = ADDR_BLOCK_MOVE; |
| 520 | } |
| 521 | } |
| 522 | else |
| 523 | { |
| 524 | switch (info->amode) |
| 525 | { |
| 526 | case ADDR_PC_REL: |
| 527 | amode = ADDR_PC_REL; |
| 528 | bytes = 1; |
| 529 | break; |
| 530 | case ADDR_PC_REL_LONG: |
| 531 | amode = ADDR_PC_REL_LONG; |
| 532 | bytes = 2; |
| 533 | break; |
| 534 | default: |
| 535 | if (override_len == 1) |
| 536 | { |
| 537 | amode = ADDR_DIR; |
| 538 | bytes = 1; |
| 539 | } |
| 540 | else if (override_len == 3) |
| 541 | { |
| 542 | bytes = 3; |
| 543 | amode = ADDR_ABS_LONG; |
| 544 | } |
| 545 | else |
| 546 | { |
| 547 | amode = ADDR_ABS; |
| 548 | bytes = 2; |
| 549 | } |
| 550 | } |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | switch (bytes) |
| 555 | { |
| 556 | case 1: |
| 557 | switch (expr_shift) |
| 558 | { |
| 559 | case 0: |
| 560 | if (amode == ADDR_DIR) |
| 561 | tc_cons_reloc = R_W65_DP; |
| 562 | else |
| 563 | tc_cons_reloc = R_W65_ABS8; |
| 564 | break; |
| 565 | case 1: |
| 566 | tc_cons_reloc = R_W65_ABS8S8; |
| 567 | break; |
| 568 | case 2: |
| 569 | tc_cons_reloc = R_W65_ABS8S16; |
| 570 | break; |
| 571 | } |
| 572 | break; |
| 573 | case 2: |
| 574 | switch (expr_shift) |
| 575 | { |
| 576 | case 0: |
| 577 | tc_cons_reloc = R_W65_ABS16; |
| 578 | break; |
| 579 | case 1: |
| 580 | tc_cons_reloc = R_W65_ABS16S8; |
| 581 | break; |
| 582 | case 2: |
| 583 | tc_cons_reloc = R_W65_ABS16S16; |
| 584 | break; |
| 585 | } |
| 586 | } |
| 587 | return ptr; |
| 588 | } |
| 589 | |
| 590 | /* Passed a pointer to a list of opcodes which use different |
| 591 | addressing modes, return the opcode which matches the opcodes |
| 592 | provided. */ |
| 593 | |
| 594 | static struct opinfo * |
| 595 | get_specific (opcode) |
| 596 | struct opinfo *opcode; |
| 597 | { |
| 598 | int ocode = opcode->code; |
| 599 | |
| 600 | for (; opcode->code == ocode; opcode++) |
| 601 | { |
| 602 | if (opcode->amode == amode) |
| 603 | return opcode; |
| 604 | } |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | int |
| 609 | check (operand, low, high) |
| 610 | expressionS *operand; |
| 611 | int low; |
| 612 | int high; |
| 613 | { |
| 614 | if (operand->X_op != O_constant |
| 615 | || operand->X_add_number < low |
| 616 | || operand->X_add_number > high) |
| 617 | { |
| 618 | as_bad ("operand must be absolute in range %d..%d", low, high); |
| 619 | } |
| 620 | return operand->X_add_number; |
| 621 | } |
| 622 | |
| 623 | static int log2[] = { 0, 0, 1, 0, 2 }; |
| 624 | |
| 625 | /* Now we know what sort of opcodes it is, let's build the bytes. */ |
| 626 | |
| 627 | static void |
| 628 | build_Mytes (opcode) |
| 629 | struct opinfo *opcode; |
| 630 | { |
| 631 | int size; |
| 632 | int type; |
| 633 | int pcrel; |
| 634 | char *output; |
| 635 | |
| 636 | if (opcode->amode == ADDR_IMPLIED) |
| 637 | { |
| 638 | output = frag_more (1); |
| 639 | } |
| 640 | else if (opcode->amode == ADDR_PC_REL) |
| 641 | { |
| 642 | int type; |
| 643 | |
| 644 | /* This is a relaxable insn, so we do some special handling. */ |
| 645 | type = opcode->val == OP_BRA ? UNCOND_BRANCH : COND_BRANCH; |
| 646 | output = frag_var (rs_machine_dependent, |
| 647 | md_relax_table[C (type, WORD_DISP)].rlx_length, |
| 648 | md_relax_table[C (type, BYTE_DISP)].rlx_length, |
| 649 | C (type, UNDEF_BYTE_DISP), |
| 650 | immediate.X_add_symbol, |
| 651 | immediate.X_add_number, |
| 652 | 0); |
| 653 | } |
| 654 | else |
| 655 | { |
| 656 | switch (opcode->amode) |
| 657 | { |
| 658 | GETINFO (size, type, pcrel); |
| 659 | } |
| 660 | |
| 661 | /* If something special was done in the expression modify the |
| 662 | reloc type. */ |
| 663 | if (tc_cons_reloc) |
| 664 | type = tc_cons_reloc; |
| 665 | |
| 666 | /* 1 byte for the opcode + the bytes for the addrmode. */ |
| 667 | output = frag_more (size + 1); |
| 668 | |
| 669 | if (opcode->amode == ADDR_BLOCK_MOVE) |
| 670 | { |
| 671 | /* Two relocs for this one. */ |
| 672 | fix_new_exp (frag_now, |
| 673 | output + 1 - frag_now->fr_literal, |
| 674 | 1, |
| 675 | &immediate, |
| 676 | 0, |
| 677 | R_W65_ABS8S16); |
| 678 | |
| 679 | fix_new_exp (frag_now, |
| 680 | output + 2 - frag_now->fr_literal, |
| 681 | 1, |
| 682 | &immediate1, |
| 683 | 0, |
| 684 | R_W65_ABS8S16); |
| 685 | } |
| 686 | else if (type >= 0 |
| 687 | && opcode->amode != ADDR_IMPLIED |
| 688 | && opcode->amode != ADDR_ACC |
| 689 | && opcode->amode != ADDR_STACK) |
| 690 | { |
| 691 | fix_new_exp (frag_now, |
| 692 | output + 1 - frag_now->fr_literal, |
| 693 | size, |
| 694 | &immediate, |
| 695 | pcrel, |
| 696 | type); |
| 697 | } |
| 698 | } |
| 699 | output[0] = opcode->val; |
| 700 | } |
| 701 | |
| 702 | /* This is the guts of the machine-dependent assembler. STR points to |
| 703 | a machine dependent instruction. This function is supposed to emit |
| 704 | the frags/bytes it assembles to. */ |
| 705 | |
| 706 | void |
| 707 | md_assemble (str) |
| 708 | char *str; |
| 709 | { |
| 710 | unsigned char *op_start; |
| 711 | unsigned char *op_end; |
| 712 | struct opinfo *opcode; |
| 713 | char name[20]; |
| 714 | int nlen = 0; |
| 715 | char *p; |
| 716 | |
| 717 | /* Drop leading whitespace */ |
| 718 | while (*str == ' ') |
| 719 | str++; |
| 720 | |
| 721 | /* all opcodes are three letters */ |
| 722 | name[0] = str[0]; |
| 723 | name[1] = str[1]; |
| 724 | name[2] = str[2]; |
| 725 | name[3] = 0; |
| 726 | |
| 727 | tc_cons_reloc = 0; |
| 728 | str += 3; |
| 729 | opcode = (struct opinfo *) hash_find (opcode_hash_control, name); |
| 730 | |
| 731 | if (opcode == NULL) |
| 732 | { |
| 733 | as_bad (_("unknown opcode")); |
| 734 | return; |
| 735 | } |
| 736 | |
| 737 | if (opcode->amode != ADDR_IMPLIED |
| 738 | && opcode->amode != ADDR_STACK) |
| 739 | { |
| 740 | get_operands (opcode, str); |
| 741 | opcode = get_specific (opcode); |
| 742 | } |
| 743 | |
| 744 | if (opcode == 0) |
| 745 | { |
| 746 | /* Couldn't find an opcode which matched the operands. */ |
| 747 | |
| 748 | char *where = frag_more (1); |
| 749 | |
| 750 | where[0] = 0x0; |
| 751 | where[1] = 0x0; |
| 752 | as_bad (_("invalid operands for opcode")); |
| 753 | return; |
| 754 | } |
| 755 | |
| 756 | build_Mytes (opcode); |
| 757 | } |
| 758 | |
| 759 | void |
| 760 | tc_crawl_symbol_chain (headers) |
| 761 | object_headers *headers; |
| 762 | { |
| 763 | printf (_("call to tc_crawl_symbol_chain \n")); |
| 764 | } |
| 765 | |
| 766 | symbolS * |
| 767 | md_undefined_symbol (name) |
| 768 | char *name; |
| 769 | { |
| 770 | return 0; |
| 771 | } |
| 772 | |
| 773 | void |
| 774 | tc_headers_hook (headers) |
| 775 | object_headers *headers; |
| 776 | { |
| 777 | printf (_("call to tc_headers_hook \n")); |
| 778 | } |
| 779 | |
| 780 | /* Various routines to kill one day. */ |
| 781 | /* Equal to MAX_PRECISION in atof-ieee.c. */ |
| 782 | #define MAX_LITTLENUMS 6 |
| 783 | |
| 784 | /* Turn a string in input_line_pointer into a floating point constant |
| 785 | of type TYPE, and store the appropriate bytes in *LITP. The number |
| 786 | of LITTLENUMS emitted is stored in *SIZEP. An error message is |
| 787 | returned, or NULL on OK. */ |
| 788 | |
| 789 | char * |
| 790 | md_atof (type, litP, sizeP) |
| 791 | char type; |
| 792 | char *litP; |
| 793 | int *sizeP; |
| 794 | { |
| 795 | int prec; |
| 796 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; |
| 797 | LITTLENUM_TYPE *wordP; |
| 798 | char *t; |
| 799 | char *atof_ieee (); |
| 800 | |
| 801 | switch (type) |
| 802 | { |
| 803 | case 'f': |
| 804 | case 'F': |
| 805 | case 's': |
| 806 | case 'S': |
| 807 | prec = 2; |
| 808 | break; |
| 809 | |
| 810 | case 'd': |
| 811 | case 'D': |
| 812 | case 'r': |
| 813 | case 'R': |
| 814 | prec = 4; |
| 815 | break; |
| 816 | |
| 817 | case 'x': |
| 818 | case 'X': |
| 819 | prec = 6; |
| 820 | break; |
| 821 | |
| 822 | case 'p': |
| 823 | case 'P': |
| 824 | prec = 6; |
| 825 | break; |
| 826 | |
| 827 | default: |
| 828 | *sizeP = 0; |
| 829 | return _("Bad call to MD_NTOF()"); |
| 830 | } |
| 831 | t = atof_ieee (input_line_pointer, type, words); |
| 832 | if (t) |
| 833 | input_line_pointer = t; |
| 834 | |
| 835 | *sizeP = prec * sizeof (LITTLENUM_TYPE); |
| 836 | for (wordP = words + prec - 1; prec--;) |
| 837 | { |
| 838 | md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); |
| 839 | litP += sizeof (LITTLENUM_TYPE); |
| 840 | } |
| 841 | return 0; |
| 842 | } |
| 843 | |
| 844 | int |
| 845 | md_parse_option (c, a) |
| 846 | int c; |
| 847 | char *a; |
| 848 | { |
| 849 | return 1; |
| 850 | } |
| 851 | |
| 852 | void |
| 853 | tc_Nout_fix_to_chars () |
| 854 | { |
| 855 | printf (_("call to tc_Nout_fix_to_chars \n")); |
| 856 | abort (); |
| 857 | } |
| 858 | |
| 859 | /* Called after relaxing, change the frags so they know how big they |
| 860 | are. */ |
| 861 | |
| 862 | void |
| 863 | md_convert_frag (headers, seg, fragP) |
| 864 | object_headers *headers; |
| 865 | segT seg; |
| 866 | fragS *fragP; |
| 867 | { |
| 868 | int disp_size = 0; |
| 869 | int inst_size = 0; |
| 870 | unsigned char *buffer = |
| 871 | (unsigned char *) (fragP->fr_fix + fragP->fr_literal); |
| 872 | |
| 873 | switch (fragP->fr_subtype) |
| 874 | { |
| 875 | case C (COND_BRANCH, BYTE_DISP): |
| 876 | case C (UNCOND_BRANCH, BYTE_DISP): |
| 877 | disp_size = 1; |
| 878 | inst_size = 1; |
| 879 | break; |
| 880 | |
| 881 | /* Conditional branches to a known 16 bit displacement. */ |
| 882 | case C (COND_BRANCH, WORD_DISP): |
| 883 | switch (buffer[0]) |
| 884 | { |
| 885 | case OP_BCC: |
| 886 | case OP_BCS: |
| 887 | case OP_BEQ: |
| 888 | case OP_BMI: |
| 889 | case OP_BNE: |
| 890 | case OP_BPL: |
| 891 | case OP_BVS: |
| 892 | case OP_BVC: |
| 893 | /* Invert the sense of the test */ |
| 894 | buffer[0] ^= 0x20; |
| 895 | buffer[1] = 3; /* Jump over following brl */ |
| 896 | buffer[2] = OP_BRL; |
| 897 | buffer[3] = 0; |
| 898 | buffer[4] = 0; |
| 899 | disp_size = 2; |
| 900 | inst_size = 3; |
| 901 | break; |
| 902 | default: |
| 903 | abort (); |
| 904 | } |
| 905 | break; |
| 906 | case C (UNCOND_BRANCH, WORD_DISP): |
| 907 | /* Unconditional branches to a known 16 bit displacement. */ |
| 908 | |
| 909 | switch (buffer[0]) |
| 910 | { |
| 911 | case OP_BRA: |
| 912 | buffer[0] = OP_BRL; |
| 913 | disp_size = 2; |
| 914 | inst_size = 1; |
| 915 | break; |
| 916 | default: |
| 917 | abort (); |
| 918 | } |
| 919 | break; |
| 920 | /* Got to create a branch over a reloc here. */ |
| 921 | case C (COND_BRANCH, UNDEF_WORD_DISP): |
| 922 | buffer[0] ^= 0x20; /* invert test */ |
| 923 | buffer[1] = 3; |
| 924 | buffer[2] = OP_BRL; |
| 925 | buffer[3] = 0; |
| 926 | buffer[4] = 0; |
| 927 | fix_new (fragP, |
| 928 | fragP->fr_fix + 3, |
| 929 | 4, |
| 930 | fragP->fr_symbol, |
| 931 | fragP->fr_offset, |
| 932 | 0, |
| 933 | R_W65_PCR16); |
| 934 | |
| 935 | fragP->fr_fix += disp_size + inst_size; |
| 936 | fragP->fr_var = 0; |
| 937 | break; |
| 938 | case C (UNCOND_BRANCH, UNDEF_WORD_DISP): |
| 939 | buffer[0] = OP_BRL; |
| 940 | buffer[1] = 0; |
| 941 | buffer[2] = 0; |
| 942 | fix_new (fragP, |
| 943 | fragP->fr_fix + 1, |
| 944 | 4, |
| 945 | fragP->fr_symbol, |
| 946 | fragP->fr_offset, |
| 947 | 0, |
| 948 | R_W65_PCR16); |
| 949 | |
| 950 | fragP->fr_fix += disp_size + inst_size; |
| 951 | fragP->fr_var = 0; |
| 952 | break; |
| 953 | default: |
| 954 | abort (); |
| 955 | } |
| 956 | if (inst_size) |
| 957 | { |
| 958 | /* Get the address of the end of the instruction. */ |
| 959 | int next_inst = (fragP->fr_fix + fragP->fr_address |
| 960 | + disp_size + inst_size); |
| 961 | int targ_addr = (S_GET_VALUE (fragP->fr_symbol) + |
| 962 | fragP->fr_offset); |
| 963 | int disp = targ_addr - next_inst; |
| 964 | |
| 965 | md_number_to_chars (buffer + inst_size, disp, disp_size); |
| 966 | fragP->fr_fix += disp_size + inst_size; |
| 967 | fragP->fr_var = 0; |
| 968 | } |
| 969 | } |
| 970 | |
| 971 | valueT |
| 972 | md_section_align (seg, size) |
| 973 | segT seg; |
| 974 | valueT size; |
| 975 | { |
| 976 | return ((size + (1 << section_alignment[(int) seg]) - 1) |
| 977 | & (-1 << section_alignment[(int) seg])); |
| 978 | } |
| 979 | |
| 980 | void |
| 981 | md_apply_fix (fixP, val) |
| 982 | fixS *fixP; |
| 983 | long val; |
| 984 | { |
| 985 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; |
| 986 | int addr = fixP->fx_frag->fr_address + fixP->fx_where; |
| 987 | |
| 988 | if (fixP->fx_r_type == 0) |
| 989 | { |
| 990 | if (fixP->fx_size == 1) |
| 991 | fixP->fx_r_type = R_W65_ABS8; |
| 992 | else |
| 993 | fixP->fx_r_type = R_W65_ABS16; |
| 994 | } |
| 995 | |
| 996 | switch (fixP->fx_r_type) |
| 997 | { |
| 998 | case R_W65_ABS8S16: |
| 999 | val >>= 8; |
| 1000 | case R_W65_ABS8S8: |
| 1001 | val >>= 8; |
| 1002 | case R_W65_ABS8: |
| 1003 | *buf++ = val; |
| 1004 | break; |
| 1005 | case R_W65_ABS16S16: |
| 1006 | val >>= 8; |
| 1007 | case R_W65_ABS16S8: |
| 1008 | val >>= 8; |
| 1009 | case R_W65_ABS16: |
| 1010 | *buf++ = val >> 0; |
| 1011 | *buf++ = val >> 8; |
| 1012 | break; |
| 1013 | case R_W65_ABS24: |
| 1014 | *buf++ = val >> 0; |
| 1015 | *buf++ = val >> 8; |
| 1016 | *buf++ = val >> 16; |
| 1017 | break; |
| 1018 | case R_W65_PCR8: |
| 1019 | *buf++ = val - addr - 1; |
| 1020 | break; |
| 1021 | case R_W65_PCR16: |
| 1022 | val = val - addr - 1; |
| 1023 | *buf++ = val; |
| 1024 | *buf++ = val >> 8; |
| 1025 | break; |
| 1026 | case R_W65_DP: |
| 1027 | *buf++ = val; |
| 1028 | break; |
| 1029 | |
| 1030 | default: |
| 1031 | abort (); |
| 1032 | } |
| 1033 | } |
| 1034 | |
| 1035 | /* Put number into target byte order */ |
| 1036 | |
| 1037 | void |
| 1038 | md_number_to_chars (ptr, use, nbytes) |
| 1039 | char *ptr; |
| 1040 | valueT use; |
| 1041 | int nbytes; |
| 1042 | { |
| 1043 | number_to_chars_littleendian (ptr, use, nbytes); |
| 1044 | } |
| 1045 | |
| 1046 | long |
| 1047 | md_pcrel_from (fixP) |
| 1048 | fixS *fixP; |
| 1049 | { |
| 1050 | int gap = fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address - 1; |
| 1051 | return gap; |
| 1052 | } |
| 1053 | |
| 1054 | void |
| 1055 | tc_coff_symbol_emit_hook (x) |
| 1056 | symbolS *x; |
| 1057 | { |
| 1058 | } |
| 1059 | |
| 1060 | short |
| 1061 | tc_coff_fix2rtype (fix_ptr) |
| 1062 | fixS *fix_ptr; |
| 1063 | { |
| 1064 | return fix_ptr->fx_r_type; |
| 1065 | } |
| 1066 | |
| 1067 | void |
| 1068 | tc_reloc_mangle (fix_ptr, intr, base) |
| 1069 | fixS *fix_ptr; |
| 1070 | struct internal_reloc *intr; |
| 1071 | bfd_vma base; |
| 1072 | |
| 1073 | { |
| 1074 | symbolS *symbol_ptr; |
| 1075 | |
| 1076 | symbol_ptr = fix_ptr->fx_addsy; |
| 1077 | |
| 1078 | /* If this relocation is attached to a symbol then it's ok |
| 1079 | to output it */ |
| 1080 | if (fix_ptr->fx_r_type == RELOC_32) |
| 1081 | { |
| 1082 | /* cons likes to create reloc32's whatever the size of the reloc.. |
| 1083 | */ |
| 1084 | switch (fix_ptr->fx_size) |
| 1085 | { |
| 1086 | case 2: |
| 1087 | intr->r_type = R_IMM16; |
| 1088 | break; |
| 1089 | case 1: |
| 1090 | intr->r_type = R_IMM8; |
| 1091 | break; |
| 1092 | default: |
| 1093 | abort (); |
| 1094 | } |
| 1095 | } |
| 1096 | else |
| 1097 | { |
| 1098 | if (fix_ptr->fx_size == 4) |
| 1099 | intr->r_type = R_W65_ABS24; |
| 1100 | else |
| 1101 | intr->r_type = fix_ptr->fx_r_type; |
| 1102 | } |
| 1103 | |
| 1104 | intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base; |
| 1105 | intr->r_offset = fix_ptr->fx_offset; |
| 1106 | |
| 1107 | /* Turn the segment of the symbol into an offset. */ |
| 1108 | if (symbol_ptr) |
| 1109 | { |
| 1110 | symbolS *dot; |
| 1111 | |
| 1112 | dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot; |
| 1113 | if (dot) |
| 1114 | { |
| 1115 | intr->r_offset += S_GET_VALUE (symbol_ptr); |
| 1116 | intr->r_symndx = dot->sy_number; |
| 1117 | } |
| 1118 | else |
| 1119 | { |
| 1120 | intr->r_symndx = symbol_ptr->sy_number; |
| 1121 | } |
| 1122 | } |
| 1123 | else |
| 1124 | { |
| 1125 | intr->r_symndx = -1; |
| 1126 | } |
| 1127 | } |
| 1128 | |
| 1129 | int |
| 1130 | tc_coff_sizemachdep (frag) |
| 1131 | fragS *frag; |
| 1132 | { |
| 1133 | return md_relax_table[frag->fr_subtype].rlx_length; |
| 1134 | } |
| 1135 | |
| 1136 | /* Called just before address relaxation, return the length by which a |
| 1137 | fragment must grow to reach it's destination. */ |
| 1138 | |
| 1139 | int |
| 1140 | md_estimate_size_before_relax (fragP, segment_type) |
| 1141 | register fragS *fragP; |
| 1142 | register segT segment_type; |
| 1143 | { |
| 1144 | int what; |
| 1145 | |
| 1146 | switch (fragP->fr_subtype) |
| 1147 | { |
| 1148 | default: |
| 1149 | abort (); |
| 1150 | |
| 1151 | case C (COND_BRANCH, UNDEF_BYTE_DISP): |
| 1152 | case C (UNCOND_BRANCH, UNDEF_BYTE_DISP): |
| 1153 | what = GET_WHAT (fragP->fr_subtype); |
| 1154 | /* Used to be a branch to somewhere which was unknown. */ |
| 1155 | if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type) |
| 1156 | { |
| 1157 | /* Got a symbol and it's defined in this segment, become byte |
| 1158 | sized - maybe it will fix up. */ |
| 1159 | fragP->fr_subtype = C (what, BYTE_DISP); |
| 1160 | } |
| 1161 | else |
| 1162 | { |
| 1163 | /* Its got a segment, but its not ours, so it will always be |
| 1164 | long. */ |
| 1165 | fragP->fr_subtype = C (what, UNDEF_WORD_DISP); |
| 1166 | } |
| 1167 | break; |
| 1168 | |
| 1169 | case C (COND_BRANCH, BYTE_DISP): |
| 1170 | case C (COND_BRANCH, WORD_DISP): |
| 1171 | case C (COND_BRANCH, UNDEF_WORD_DISP): |
| 1172 | case C (UNCOND_BRANCH, BYTE_DISP): |
| 1173 | case C (UNCOND_BRANCH, WORD_DISP): |
| 1174 | case C (UNCOND_BRANCH, UNDEF_WORD_DISP): |
| 1175 | /* When relaxing a section for the second time, we don't need to |
| 1176 | do anything besides return the current size. */ |
| 1177 | break; |
| 1178 | } |
| 1179 | |
| 1180 | fragP->fr_var = md_relax_table[fragP->fr_subtype].rlx_length; |
| 1181 | return fragP->fr_var; |
| 1182 | } |
| 1183 | |
| 1184 | CONST char *md_shortopts = ""; |
| 1185 | struct option md_longopts[] = { |
| 1186 | #define OPTION_RELAX (OPTION_MD_BASE) |
| 1187 | {NULL, no_argument, NULL, 0} |
| 1188 | }; |
| 1189 | |
| 1190 | void |
| 1191 | md_show_usage (stream) |
| 1192 | FILE *stream; |
| 1193 | { |
| 1194 | } |
| 1195 | |
| 1196 | size_t md_longopts_size = sizeof (md_longopts); |