1 /* tc-pdp11.c - pdp11-specific - 2 Copyright (C) 2001-2020 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 #include "as.h" 22 #include "safe-ctype.h" 23 #include "opcode/pdp11.h" 24 25 extern int flonum_gen2vax (int, FLONUM_TYPE * f, LITTLENUM_TYPE *); 26 27 #define TRUE 1 28 #define FALSE 0 29 30 /* A representation for PDP-11 machine code. */ 31 struct pdp11_code 32 { 33 const char *error; 34 int code; 35 int additional; /* Is there an additional word? */ 36 int word; /* Additional word, if any. */ 37 struct 38 { 39 bfd_reloc_code_real_type type; 40 expressionS exp; 41 int pc_rel; 42 } reloc; 43 }; 44 45 /* Instruction set extensions. 46 47 If you change this from an array to something else, please update 48 the "PDP-11 instruction set extensions" comment in pdp11.h. */ 49 int pdp11_extension[PDP11_EXT_NUM]; 50 51 /* Assembly options. */ 52 53 #define ASM_OPT_PIC 1 54 #define ASM_OPT_NUM 2 55 56 int asm_option[ASM_OPT_NUM]; 57 58 /* These chars start a comment anywhere in a source file (except inside 59 another comment. */ 60 const char comment_chars[] = "#/"; 61 62 /* These chars only start a comment at the beginning of a line. */ 63 const char line_comment_chars[] = "#/"; 64 65 const char line_separator_chars[] = ";"; 66 67 /* Chars that can be used to separate mant from exp in floating point nums. */ 68 const char EXP_CHARS[] = "eE"; 69 70 /* Chars that mean this number is a floating point constant. */ 71 /* as in 0f123.456. */ 72 /* or 0H1.234E-12 (see exp chars above). */ 73 const char FLT_CHARS[] = "dDfF"; 74 75 void pseudo_even (int); 76 void pseudo_bss (int); 77 78 const pseudo_typeS md_pseudo_table[] = 79 { 80 { "bss", pseudo_bss, 0 }, 81 { "even", pseudo_even, 0 }, 82 { 0, 0, 0 }, 83 }; 84 85 static struct hash_control *insn_hash = NULL; 86 87 static int 88 set_option (const char *arg) 89 { 90 int yes = 1; 91 92 if (strcmp (arg, "all-extensions") == 0 93 || strcmp (arg, "all") == 0) 94 { 95 memset (pdp11_extension, ~0, sizeof pdp11_extension); 96 pdp11_extension[PDP11_NONE] = 0; 97 return 1; 98 } 99 else if (strcmp (arg, "no-extensions") == 0) 100 { 101 memset (pdp11_extension, 0, sizeof pdp11_extension); 102 pdp11_extension[PDP11_BASIC] = 1; 103 return 1; 104 } 105 106 if (strncmp (arg, "no-", 3) == 0) 107 { 108 yes = 0; 109 arg += 3; 110 } 111 112 /* Commercial instructions. */ 113 if (strcmp (arg, "cis") == 0) 114 pdp11_extension[PDP11_CIS] = yes; 115 /* Call supervisor mode. */ 116 else if (strcmp (arg, "csm") == 0) 117 pdp11_extension[PDP11_CSM] = yes; 118 /* Extended instruction set. */ 119 else if (strcmp (arg, "eis") == 0) 120 pdp11_extension[PDP11_EIS] = pdp11_extension[PDP11_LEIS] = yes; 121 /* KEV11 floating-point. */ 122 else if (strcmp (arg, "fis") == 0 123 || strcmp (arg, "kev11") == 0 124 || strcmp (arg, "kev-11") == 0) 125 pdp11_extension[PDP11_FIS] = yes; 126 /* FP-11 floating-point. */ 127 else if (strcmp (arg, "fpp") == 0 128 || strcmp (arg, "fpu") == 0 129 || strcmp (arg, "fp11") == 0 130 || strcmp (arg, "fp-11") == 0 131 || strcmp (arg, "fpj11") == 0 132 || strcmp (arg, "fp-j11") == 0 133 || strcmp (arg, "fpj-11") == 0) 134 pdp11_extension[PDP11_FPP] = yes; 135 /* Limited extended insns. */ 136 else if (strcmp (arg, "limited-eis") == 0) 137 { 138 pdp11_extension[PDP11_LEIS] = yes; 139 if (!pdp11_extension[PDP11_LEIS]) 140 pdp11_extension[PDP11_EIS] = 0; 141 } 142 /* Move from processor type. */ 143 else if (strcmp (arg, "mfpt") == 0) 144 pdp11_extension[PDP11_MFPT] = yes; 145 /* Multiprocessor insns: */ 146 else if (strncmp (arg, "mproc", 5) == 0 147 /* TSTSET, WRTLCK */ 148 || strncmp (arg, "multiproc", 9) == 0) 149 pdp11_extension[PDP11_MPROC] = yes; 150 /* Move from/to proc status. */ 151 else if (strcmp (arg, "mxps") == 0) 152 pdp11_extension[PDP11_MXPS] = yes; 153 /* Position-independent code. */ 154 else if (strcmp (arg, "pic") == 0) 155 asm_option[ASM_OPT_PIC] = yes; 156 /* Set priority level. */ 157 else if (strcmp (arg, "spl") == 0) 158 pdp11_extension[PDP11_SPL] = yes; 159 /* Microcode instructions: */ 160 else if (strcmp (arg, "ucode") == 0 161 /* LDUB, MED, XFC */ 162 || strcmp (arg, "microcode") == 0) 163 pdp11_extension[PDP11_UCODE] = yes; 164 else 165 return 0; 166 167 return 1; 168 } 169 170 171 static void 172 init_defaults (void) 173 { 174 static int first = 1; 175 176 if (first) 177 { 178 set_option ("all-extensions"); 179 set_option ("pic"); 180 first = 0; 181 } 182 } 183 184 void 185 md_begin (void) 186 { 187 int i; 188 189 init_defaults (); 190 191 insn_hash = hash_new (); 192 if (insn_hash == NULL) 193 as_fatal (_("Virtual memory exhausted")); 194 195 for (i = 0; i < pdp11_num_opcodes; i++) 196 hash_insert (insn_hash, pdp11_opcodes[i].name, (void *) (pdp11_opcodes + i)); 197 for (i = 0; i < pdp11_num_aliases; i++) 198 hash_insert (insn_hash, pdp11_aliases[i].name, (void *) (pdp11_aliases + i)); 199 } 200 201 void 202 md_number_to_chars (char con[], valueT value, int nbytes) 203 { 204 /* On a PDP-11, 0x1234 is stored as "\x12\x34", and 205 0x12345678 is stored as "\x56\x78\x12\x34". It's 206 anyone's guess what 0x123456 would be stored like. */ 207 208 switch (nbytes) 209 { 210 case 0: 211 break; 212 case 1: 213 con[0] = value & 0xff; 214 break; 215 case 2: 216 con[0] = value & 0xff; 217 con[1] = (value >> 8) & 0xff; 218 break; 219 case 4: 220 con[0] = (value >> 16) & 0xff; 221 con[1] = (value >> 24) & 0xff; 222 con[2] = value & 0xff; 223 con[3] = (value >> 8) & 0xff; 224 break; 225 default: 226 BAD_CASE (nbytes); 227 } 228 } 229 230 /* Fix up some data or instructions after we find out the value of a symbol 231 that they reference. Knows about order of bytes in address. */ 232 233 void 234 md_apply_fix (fixS *fixP, 235 valueT * valP, 236 segT seg ATTRIBUTE_UNUSED) 237 { 238 valueT code; 239 valueT mask; 240 valueT val = * valP; 241 char *buf; 242 int shift; 243 int size; 244 245 buf = fixP->fx_where + fixP->fx_frag->fr_literal; 246 size = fixP->fx_size; 247 code = md_chars_to_number ((unsigned char *) buf, size); 248 249 switch (fixP->fx_r_type) 250 { 251 case BFD_RELOC_8: 252 mask = 0xff; 253 shift = 0; 254 break; 255 case BFD_RELOC_16: 256 case BFD_RELOC_16_PCREL: 257 mask = 0xffff; 258 shift = 0; 259 break; 260 case BFD_RELOC_PDP11_DISP_8_PCREL: 261 mask = 0x00ff; 262 shift = 1; 263 break; 264 case BFD_RELOC_PDP11_DISP_6_PCREL: 265 mask = 0x003f; 266 shift = 1; 267 val = -val; 268 break; 269 default: 270 BAD_CASE (fixP->fx_r_type); 271 } 272 273 if (fixP->fx_addsy != NULL) 274 val += symbol_get_bfdsym (fixP->fx_addsy)->section->vma; 275 /* *value += fixP->fx_addsy->bsym->section->vma; */ 276 277 code &= ~mask; 278 code |= (val >> shift) & mask; 279 number_to_chars_littleendian (buf, code, size); 280 281 if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) 282 fixP->fx_done = 1; 283 } 284 285 long 286 md_chars_to_number (unsigned char *con, int nbytes) 287 { 288 /* On a PDP-11, 0x1234 is stored as "\x12\x34", and 289 0x12345678 is stored as "\x56\x78\x12\x34". It's 290 anyone's guess what 0x123456 would be stored like. */ 291 switch (nbytes) 292 { 293 case 0: 294 return 0; 295 case 1: 296 return con[0]; 297 case 2: 298 return (con[1] << BITS_PER_CHAR) | con[0]; 299 case 4: 300 return 301 (((con[1] << BITS_PER_CHAR) | con[0]) << (2 * BITS_PER_CHAR)) 302 |((con[3] << BITS_PER_CHAR) | con[2]); 303 default: 304 BAD_CASE (nbytes); 305 return 0; 306 } 307 } 308 309 static char * 310 skip_whitespace (char *str) 311 { 312 while (*str == ' ' || *str == '\t') 313 str++; 314 return str; 315 } 316 317 static char * 318 find_whitespace (char *str) 319 { 320 while (*str != ' ' && *str != '\t' && *str != 0) 321 str++; 322 return str; 323 } 324 325 static char * 326 parse_reg (char *str, struct pdp11_code *operand) 327 { 328 str = skip_whitespace (str); 329 if (TOLOWER (*str) == 'r') 330 { 331 str++; 332 switch (*str) 333 { 334 case '0': case '1': case '2': case '3': 335 case '4': case '5': case '6': case '7': 336 operand->code = *str - '0'; 337 str++; 338 break; 339 default: 340 operand->error = _("Bad register name"); 341 return str - 1; 342 } 343 } 344 else if (strncmp (str, "sp", 2) == 0 345 || strncmp (str, "SP", 2) == 0) 346 { 347 operand->code = 6; 348 str += 2; 349 } 350 else if (strncmp (str, "pc", 2) == 0 351 || strncmp (str, "PC", 2) == 0) 352 { 353 operand->code = 7; 354 str += 2; 355 } 356 else 357 operand->error = _("Bad register name"); 358 359 return str; 360 } 361 362 static char * 363 parse_ac5 (char *str, struct pdp11_code *operand) 364 { 365 str = skip_whitespace (str); 366 if (strncmp (str, "fr", 2) == 0 367 || strncmp (str, "FR", 2) == 0 368 || strncmp (str, "ac", 2) == 0 369 || strncmp (str, "AC", 2) == 0) 370 { 371 str += 2; 372 switch (*str) 373 { 374 case '0': case '1': case '2': case '3': 375 case '4': case '5': 376 operand->code = *str - '0'; 377 str++; 378 break; 379 default: 380 operand->error = _("Bad register name"); 381 return str - 2; 382 } 383 } 384 else 385 { 386 operand->error = _("Bad register name"); 387 return str; 388 } 389 390 return str; 391 } 392 393 static char * 394 parse_ac (char *str, struct pdp11_code *operand) 395 { 396 str = parse_ac5 (str, operand); 397 if (!operand->error && operand->code > 3) 398 { 399 operand->error = _("Bad register name"); 400 return str - 3; 401 } 402 403 return str; 404 } 405 406 static char * 407 parse_expression (char *str, struct pdp11_code *operand) 408 { 409 char *save_input_line_pointer; 410 segT seg; 411 412 save_input_line_pointer = input_line_pointer; 413 input_line_pointer = str; 414 seg = expression (&operand->reloc.exp); 415 if (seg == NULL) 416 { 417 input_line_pointer = save_input_line_pointer; 418 operand->error = _("Error in expression"); 419 return str; 420 } 421 422 str = input_line_pointer; 423 input_line_pointer = save_input_line_pointer; 424 425 operand->reloc.pc_rel = 0; 426 427 return str; 428 } 429 430 static char * 431 parse_op_no_deferred (char *str, struct pdp11_code *operand) 432 { 433 LITTLENUM_TYPE literal_float[2]; 434 435 str = skip_whitespace (str); 436 437 switch (*str) 438 { 439 case '(': /* (rn) and (rn)+ */ 440 str = parse_reg (str + 1, operand); 441 if (operand->error) 442 return str; 443 str = skip_whitespace (str); 444 if (*str != ')') 445 { 446 operand->error = _("Missing ')'"); 447 return str; 448 } 449 str++; 450 if (*str == '+') 451 { 452 operand->code |= 020; 453 str++; 454 } 455 else 456 { 457 operand->code |= 010; 458 } 459 break; 460 461 /* Immediate. */ 462 case '#': 463 case '$': 464 str = parse_expression (str + 1, operand); 465 if (operand->error) 466 return str; 467 operand->additional = TRUE; 468 operand->word = operand->reloc.exp.X_add_number; 469 switch (operand->reloc.exp.X_op) 470 { 471 case O_constant: 472 break; 473 case O_symbol: 474 case O_add: 475 case O_subtract: 476 operand->reloc.type = BFD_RELOC_16; 477 operand->reloc.pc_rel = 0; 478 break; 479 case O_big: 480 if (operand->reloc.exp.X_add_number > 0) 481 { 482 operand->error = _("Error in expression"); 483 break; 484 } 485 /* It's a floating literal... */ 486 know (operand->reloc.exp.X_add_number < 0); 487 flonum_gen2vax ('f', &generic_floating_point_number, literal_float); 488 operand->word = literal_float[0]; 489 if (literal_float[1] != 0) 490 as_warn (_("Low order bits truncated in immediate float operand")); 491 break; 492 default: 493 operand->error = _("Error in expression"); 494 break; 495 } 496 operand->code = 027; 497 break; 498 499 /* label, d(rn), -(rn) */ 500 default: 501 { 502 if (strncmp (str, "-(", 2) == 0) /* -(rn) */ 503 { 504 str = parse_reg (str + 2, operand); 505 if (operand->error) 506 return str; 507 str = skip_whitespace (str); 508 if (*str != ')') 509 { 510 operand->error = _("Missing ')'"); 511 return str; 512 } 513 operand->code |= 040; 514 str++; 515 break; 516 } 517 518 str = parse_expression (str, operand); 519 if (operand->error) 520 return str; 521 522 str = skip_whitespace (str); 523 524 if (*str != '(') 525 { 526 operand->code = 067; 527 operand->additional = 1; 528 operand->word = 0; 529 operand->reloc.type = BFD_RELOC_16_PCREL; 530 operand->reloc.pc_rel = 1; 531 break; 532 } 533 534 /* d(rn) */ 535 str++; 536 str = parse_reg (str, operand); 537 if (operand->error) 538 return str; 539 540 str = skip_whitespace (str); 541 542 if (*str != ')') 543 { 544 operand->error = _("Missing ')'"); 545 return str; 546 } 547 548 str++; 549 operand->additional = TRUE; 550 operand->code |= 060; 551 switch (operand->reloc.exp.X_op) 552 { 553 case O_symbol: 554 operand->reloc.type = BFD_RELOC_16; 555 operand->reloc.pc_rel = 0; 556 break; 557 case O_constant: 558 if ((operand->code & 7) == 7) 559 { 560 operand->reloc.pc_rel = 1; 561 operand->word = operand->reloc.exp.X_add_number; 562 } 563 else 564 operand->word = operand->reloc.exp.X_add_number; 565 566 break; 567 default: 568 BAD_CASE (operand->reloc.exp.X_op); 569 } 570 break; 571 } 572 } 573 574 return str; 575 } 576 577 static char * 578 parse_op_noreg (char *str, struct pdp11_code *operand) 579 { 580 str = skip_whitespace (str); 581 operand->error = NULL; 582 583 if (*str == '@' || *str == '*') 584 { 585 /* @(Rn) == @0(Rn): Mode 7, Indexed deferred. 586 Check for auto-increment deferred. */ 587 if (str[1] == '(' 588 && str[2] != 0 589 && str[3] != 0 590 && str[4] != 0 591 && str[5] != '+') 592 { 593 /* Change implied to explicit index deferred. */ 594 *str = '0'; 595 str = parse_op_no_deferred (str, operand); 596 } 597 else 598 { 599 /* @Rn == (Rn): Register deferred. */ 600 str = parse_reg (str + 1, operand); 601 602 /* Not @Rn */ 603 if (operand->error) 604 { 605 operand->error = NULL; 606 str = parse_op_no_deferred (str, operand); 607 } 608 } 609 610 if (operand->error) 611 return str; 612 613 operand->code |= 010; 614 } 615 else 616 str = parse_op_no_deferred (str, operand); 617 618 return str; 619 } 620 621 static char * 622 parse_op (char *str, struct pdp11_code *operand) 623 { 624 str = skip_whitespace (str); 625 626 str = parse_reg (str, operand); 627 if (!operand->error) 628 return str; 629 630 operand->error = NULL; 631 parse_ac5 (str, operand); 632 if (!operand->error) 633 { 634 operand->error = _("Float AC not legal as integer operand"); 635 return str; 636 } 637 638 return parse_op_noreg (str, operand); 639 } 640 641 static char * 642 parse_fop (char *str, struct pdp11_code *operand) 643 { 644 str = skip_whitespace (str); 645 646 str = parse_ac5 (str, operand); 647 if (!operand->error) 648 return str; 649 650 operand->error = NULL; 651 parse_reg (str, operand); 652 if (!operand->error) 653 { 654 operand->error = _("General register not legal as float operand"); 655 return str; 656 } 657 658 return parse_op_noreg (str, operand); 659 } 660 661 static char * 662 parse_separator (char *str, int *error) 663 { 664 str = skip_whitespace (str); 665 *error = (*str != ','); 666 if (!*error) 667 str++; 668 return str; 669 } 670 671 void 672 md_assemble (char *instruction_string) 673 { 674 const struct pdp11_opcode *op; 675 struct pdp11_code insn, op1, op2; 676 int error; 677 int size; 678 const char *err = NULL; 679 char *str; 680 char *p; 681 char c; 682 683 str = skip_whitespace (instruction_string); 684 p = find_whitespace (str); 685 if (p - str == 0) 686 { 687 as_bad (_("No instruction found")); 688 return; 689 } 690 691 c = *p; 692 *p = '\0'; 693 op = (struct pdp11_opcode *)hash_find (insn_hash, str); 694 *p = c; 695 if (op == 0) 696 { 697 as_bad (_("Unknown instruction '%s'"), str); 698 return; 699 } 700 701 if (!pdp11_extension[op->extension]) 702 { 703 as_warn (_("Unsupported instruction set extension: %s"), op->name); 704 return; 705 } 706 707 insn.error = NULL; 708 insn.code = op->opcode; 709 insn.reloc.type = BFD_RELOC_NONE; 710 op1.error = NULL; 711 op1.additional = FALSE; 712 op1.reloc.type = BFD_RELOC_NONE; 713 op2.error = NULL; 714 op2.additional = FALSE; 715 op2.reloc.type = BFD_RELOC_NONE; 716 717 str = p; 718 size = 2; 719 720 switch (op->type) 721 { 722 case PDP11_OPCODE_NO_OPS: 723 str = skip_whitespace (str); 724 break; 725 726 case PDP11_OPCODE_IMM3: 727 case PDP11_OPCODE_IMM6: 728 case PDP11_OPCODE_IMM8: 729 str = skip_whitespace (str); 730 if (*str == '#' || *str == '$') 731 str++; 732 str = parse_expression (str, &op1); 733 if (op1.error) 734 break; 735 if (op1.reloc.exp.X_op != O_constant || op1.reloc.type != BFD_RELOC_NONE) 736 { 737 op1.error = _("operand is not an absolute constant"); 738 break; 739 } 740 switch (op->type) 741 { 742 case PDP11_OPCODE_IMM3: 743 if (op1.reloc.exp.X_add_number & ~7) 744 { 745 op1.error = _("3-bit immediate out of range"); 746 break; 747 } 748 break; 749 case PDP11_OPCODE_IMM6: 750 if (op1.reloc.exp.X_add_number & ~0x3f) 751 { 752 op1.error = _("6-bit immediate out of range"); 753 break; 754 } 755 break; 756 case PDP11_OPCODE_IMM8: 757 if (op1.reloc.exp.X_add_number & ~0xff) 758 { 759 op1.error = _("8-bit immediate out of range"); 760 break; 761 } 762 break; 763 } 764 insn.code |= op1.reloc.exp.X_add_number; 765 break; 766 767 case PDP11_OPCODE_DISPL: 768 { 769 char *new_pointer; 770 new_pointer = parse_expression (str, &op1); 771 op1.code = 0; 772 op1.reloc.pc_rel = 1; 773 op1.reloc.type = BFD_RELOC_PDP11_DISP_8_PCREL; 774 if (op1.reloc.exp.X_op != O_symbol) 775 { 776 op1.error = _("Symbol expected"); 777 break; 778 } 779 if (op1.code & ~0xff) 780 { 781 err = _("8-bit displacement out of range"); 782 break; 783 } 784 str = new_pointer; 785 insn.code |= op1.code; 786 insn.reloc = op1.reloc; 787 } 788 break; 789 790 case PDP11_OPCODE_REG: 791 str = parse_reg (str, &op1); 792 if (op1.error) 793 break; 794 insn.code |= op1.code; 795 break; 796 797 case PDP11_OPCODE_OP: 798 str = parse_op (str, &op1); 799 if (op1.error) 800 break; 801 insn.code |= op1.code; 802 if (op1.additional) 803 size += 2; 804 break; 805 806 case PDP11_OPCODE_FOP: 807 str = parse_fop (str, &op1); 808 if (op1.error) 809 break; 810 insn.code |= op1.code; 811 if (op1.additional) 812 size += 2; 813 break; 814 815 case PDP11_OPCODE_REG_OP: 816 str = parse_reg (str, &op2); 817 if (op2.error) 818 break; 819 insn.code |= op2.code << 6; 820 str = parse_separator (str, &error); 821 if (error) 822 { 823 op2.error = _("Missing ','"); 824 break; 825 } 826 str = parse_op (str, &op1); 827 if (op1.error) 828 break; 829 insn.code |= op1.code; 830 if (op1.additional) 831 size += 2; 832 break; 833 834 case PDP11_OPCODE_REG_OP_REV: 835 str = parse_op (str, &op1); 836 if (op1.error) 837 break; 838 insn.code |= op1.code; 839 if (op1.additional) 840 size += 2; 841 str = parse_separator (str, &error); 842 if (error) 843 { 844 op2.error = _("Missing ','"); 845 break; 846 } 847 str = parse_reg (str, &op2); 848 if (op2.error) 849 break; 850 insn.code |= op2.code << 6; 851 break; 852 853 case PDP11_OPCODE_AC_FOP: 854 str = parse_ac (str, &op2); 855 if (op2.error) 856 break; 857 insn.code |= op2.code << 6; 858 str = parse_separator (str, &error); 859 if (error) 860 { 861 op1.error = _("Missing ','"); 862 break; 863 } 864 str = parse_fop (str, &op1); 865 if (op1.error) 866 break; 867 insn.code |= op1.code; 868 if (op1.additional) 869 size += 2; 870 break; 871 872 case PDP11_OPCODE_FOP_AC: 873 str = parse_fop (str, &op1); 874 if (op1.error) 875 break; 876 insn.code |= op1.code; 877 if (op1.additional) 878 size += 2; 879 str = parse_separator (str, &error); 880 if (error) 881 { 882 op1.error = _("Missing ','"); 883 break; 884 } 885 str = parse_ac (str, &op2); 886 if (op2.error) 887 break; 888 insn.code |= op2.code << 6; 889 break; 890 891 case PDP11_OPCODE_AC_OP: 892 str = parse_ac (str, &op2); 893 if (op2.error) 894 break; 895 insn.code |= op2.code << 6; 896 str = parse_separator (str, &error); 897 if (error) 898 { 899 op1.error = _("Missing ','"); 900 break; 901 } 902 str = parse_op (str, &op1); 903 if (op1.error) 904 break; 905 insn.code |= op1.code; 906 if (op1.additional) 907 size += 2; 908 break; 909 910 case PDP11_OPCODE_OP_AC: 911 str = parse_op (str, &op1); 912 if (op1.error) 913 break; 914 insn.code |= op1.code; 915 if (op1.additional) 916 size += 2; 917 str = parse_separator (str, &error); 918 if (error) 919 { 920 op1.error = _("Missing ','"); 921 break; 922 } 923 str = parse_ac (str, &op2); 924 if (op2.error) 925 break; 926 insn.code |= op2.code << 6; 927 break; 928 929 case PDP11_OPCODE_OP_OP: 930 str = parse_op (str, &op1); 931 if (op1.error) 932 break; 933 insn.code |= op1.code << 6; 934 if (op1.additional) 935 size += 2; 936 str = parse_separator (str, &error); 937 if (error) 938 { 939 op2.error = _("Missing ','"); 940 break; 941 } 942 str = parse_op (str, &op2); 943 if (op2.error) 944 break; 945 insn.code |= op2.code; 946 if (op2.additional) 947 size += 2; 948 break; 949 950 case PDP11_OPCODE_REG_DISPL: 951 { 952 char *new_pointer; 953 str = parse_reg (str, &op2); 954 if (op2.error) 955 break; 956 insn.code |= op2.code << 6; 957 str = parse_separator (str, &error); 958 if (error) 959 { 960 op1.error = _("Missing ','"); 961 break; 962 } 963 new_pointer = parse_expression (str, &op1); 964 op1.code = 0; 965 op1.reloc.pc_rel = 1; 966 op1.reloc.type = BFD_RELOC_PDP11_DISP_6_PCREL; 967 if (op1.reloc.exp.X_op != O_symbol) 968 { 969 op1.error = _("Symbol expected"); 970 break; 971 } 972 if (op1.code & ~0x3f) 973 { 974 err = _("6-bit displacement out of range"); 975 break; 976 } 977 str = new_pointer; 978 insn.code |= op1.code; 979 insn.reloc = op1.reloc; 980 } 981 break; 982 983 default: 984 BAD_CASE (op->type); 985 } 986 987 if (op1.error) 988 err = op1.error; 989 else if (op2.error) 990 err = op2.error; 991 else 992 { 993 str = skip_whitespace (str); 994 if (*str) 995 err = _("Too many operands"); 996 } 997 998 { 999 char *to = NULL; 1000 1001 if (err) 1002 { 1003 as_bad ("%s", err); 1004 return; 1005 } 1006 1007 to = frag_more (size); 1008 1009 md_number_to_chars (to, insn.code, 2); 1010 if (insn.reloc.type != BFD_RELOC_NONE) 1011 fix_new_exp (frag_now, to - frag_now->fr_literal, 2, 1012 &insn.reloc.exp, insn.reloc.pc_rel, insn.reloc.type); 1013 to += 2; 1014 1015 if (op1.additional) 1016 { 1017 md_number_to_chars (to, op1.word, 2); 1018 if (op1.reloc.type != BFD_RELOC_NONE) 1019 fix_new_exp (frag_now, to - frag_now->fr_literal, 2, 1020 &op1.reloc.exp, op1.reloc.pc_rel, op1.reloc.type); 1021 to += 2; 1022 } 1023 1024 if (op2.additional) 1025 { 1026 md_number_to_chars (to, op2.word, 2); 1027 if (op2.reloc.type != BFD_RELOC_NONE) 1028 fix_new_exp (frag_now, to - frag_now->fr_literal, 2, 1029 &op2.reloc.exp, op2.reloc.pc_rel, op2.reloc.type); 1030 } 1031 } 1032 } 1033 1034 int 1035 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED, 1036 segT segment ATTRIBUTE_UNUSED) 1037 { 1038 return 0; 1039 } 1040 1041 void 1042 md_convert_frag (bfd *headers ATTRIBUTE_UNUSED, 1043 segT seg ATTRIBUTE_UNUSED, 1044 fragS *fragP ATTRIBUTE_UNUSED) 1045 { 1046 } 1047 1048 int md_short_jump_size = 2; 1049 int md_long_jump_size = 4; 1050 1051 void 1052 md_create_short_jump (char *ptr ATTRIBUTE_UNUSED, 1053 addressT from_addr ATTRIBUTE_UNUSED, 1054 addressT to_addr ATTRIBUTE_UNUSED, 1055 fragS *frag ATTRIBUTE_UNUSED, 1056 symbolS *to_symbol ATTRIBUTE_UNUSED) 1057 { 1058 } 1059 1060 void 1061 md_create_long_jump (char *ptr ATTRIBUTE_UNUSED, 1062 addressT from_addr ATTRIBUTE_UNUSED, 1063 addressT to_addr ATTRIBUTE_UNUSED, 1064 fragS *frag ATTRIBUTE_UNUSED, 1065 symbolS *to_symbol ATTRIBUTE_UNUSED) 1066 { 1067 } 1068 1069 static int 1070 set_cpu_model (const char *arg) 1071 { 1072 char buf[4]; 1073 char *model = buf; 1074 1075 if (arg[0] == 'k') 1076 arg++; 1077 1078 *model++ = *arg++; 1079 1080 if (strchr ("abdx", model[-1]) == NULL) 1081 return 0; 1082 1083 if (model[-1] == 'd') 1084 { 1085 if (arg[0] == 'f' || arg[0] == 'j') 1086 model[-1] = *arg++; 1087 } 1088 else if (model[-1] == 'x') 1089 { 1090 if (arg[0] == 't') 1091 model[-1] = *arg++; 1092 } 1093 1094 if (arg[0] == '-') 1095 arg++; 1096 1097 if (strncmp (arg, "11", 2) != 0) 1098 return 0; 1099 arg += 2; 1100 1101 if (arg[0] == '-') 1102 { 1103 if (*++arg == 0) 1104 return 0; 1105 } 1106 1107 /* Allow up to two revision letters. */ 1108 if (arg[0] != 0) 1109 *model++ = *arg++; 1110 if (arg[0] != 0) 1111 *model++ = *arg++; 1112 1113 *model++ = 0; 1114 1115 set_option ("no-extensions"); 1116 1117 /* KA11 (11/15/20). */ 1118 if (strncmp (buf, "a", 1) == 0) 1119 return 1; /* No extensions. */ 1120 1121 /* KB11 (11/45/50/55/70). */ 1122 else if (strncmp (buf, "b", 1) == 0) 1123 return set_option ("eis") && set_option ("spl"); 1124 1125 /* KD11-A (11/35/40). */ 1126 else if (strncmp (buf, "da", 2) == 0) 1127 return set_option ("limited-eis"); 1128 1129 /* KD11-B (11/05/10). */ 1130 else if (strncmp (buf, "db", 2) == 0 1131 /* KD11-D (11/04). */ 1132 || strncmp (buf, "dd", 2) == 0) 1133 return 1; /* no extensions */ 1134 1135 /* KD11-E (11/34). */ 1136 else if (strncmp (buf, "de", 2) == 0) 1137 return set_option ("eis") && set_option ("mxps"); 1138 1139 /* KD11-F (11/03). */ 1140 else if (strncmp (buf, "df", 2) == 0 1141 /* KD11-H (11/03). */ 1142 || strncmp (buf, "dh", 2) == 0 1143 /* KD11-Q (11/03). */ 1144 || strncmp (buf, "dq", 2) == 0) 1145 return set_option ("limited-eis") && set_option ("mxps"); 1146 1147 /* KD11-K (11/60). */ 1148 else if (strncmp (buf, "dk", 2) == 0) 1149 return set_option ("eis") 1150 && set_option ("mxps") 1151 && set_option ("ucode"); 1152 1153 /* KD11-Z (11/44). */ 1154 else if (strncmp (buf, "dz", 2) == 0) 1155 return set_option ("csm") 1156 && set_option ("eis") 1157 && set_option ("mfpt") 1158 && set_option ("mxps") 1159 && set_option ("spl"); 1160 1161 /* F11 (11/23/24). */ 1162 else if (strncmp (buf, "f", 1) == 0) 1163 return set_option ("eis") 1164 && set_option ("mfpt") 1165 && set_option ("mxps"); 1166 1167 /* J11 (11/53/73/83/84/93/94). */ 1168 else if (strncmp (buf, "j", 1) == 0) 1169 return set_option ("csm") 1170 && set_option ("eis") 1171 && set_option ("mfpt") 1172 && set_option ("multiproc") 1173 && set_option ("mxps") 1174 && set_option ("spl"); 1175 1176 /* T11 (11/21). */ 1177 else if (strncmp (buf, "t", 1) == 0) 1178 return set_option ("limited-eis") 1179 && set_option ("mxps"); 1180 1181 else 1182 return 0; 1183 } 1184 1185 static int 1186 set_machine_model (const char *arg) 1187 { 1188 if (strncmp (arg, "pdp-11/", 7) != 0 1189 && strncmp (arg, "pdp11/", 6) != 0 1190 && strncmp (arg, "11/", 3) != 0) 1191 return 0; 1192 1193 if (strncmp (arg, "pdp", 3) == 0) 1194 arg += 3; 1195 if (arg[0] == '-') 1196 arg++; 1197 if (strncmp (arg, "11/", 3) == 0) 1198 arg += 3; 1199 1200 if (strcmp (arg, "03") == 0) 1201 return set_cpu_model ("kd11f"); 1202 1203 else if (strcmp (arg, "04") == 0) 1204 return set_cpu_model ("kd11d"); 1205 1206 else if (strcmp (arg, "05") == 0 1207 || strcmp (arg, "10") == 0) 1208 return set_cpu_model ("kd11b"); 1209 1210 else if (strcmp (arg, "15") == 0 1211 || strcmp (arg, "20") == 0) 1212 return set_cpu_model ("ka11"); 1213 1214 else if (strcmp (arg, "21") == 0) 1215 return set_cpu_model ("t11"); 1216 1217 else if (strcmp (arg, "23") == 0 1218 || strcmp (arg, "24") == 0) 1219 return set_cpu_model ("f11"); 1220 1221 else if (strcmp (arg, "34") == 0 1222 || strcmp (arg, "34a") == 0) 1223 return set_cpu_model ("kd11e"); 1224 1225 else if (strcmp (arg, "35") == 0 1226 || strcmp (arg, "40") == 0) 1227 return set_cpu_model ("kd11da"); 1228 1229 else if (strcmp (arg, "44") == 0) 1230 return set_cpu_model ("kd11dz"); 1231 1232 else if (strcmp (arg, "45") == 0 1233 || strcmp (arg, "50") == 0 1234 || strcmp (arg, "55") == 0 1235 || strcmp (arg, "70") == 0) 1236 return set_cpu_model ("kb11"); 1237 1238 else if (strcmp (arg, "60") == 0) 1239 return set_cpu_model ("kd11k"); 1240 1241 else if (strcmp (arg, "53") == 0 1242 || strcmp (arg, "73") == 0 1243 || strcmp (arg, "83") == 0 1244 || strcmp (arg, "84") == 0 1245 || strcmp (arg, "93") == 0 1246 || strcmp (arg, "94") == 0) 1247 return set_cpu_model ("j11") 1248 && set_option ("fpp"); 1249 1250 else 1251 return 0; 1252 } 1253 1254 const char *md_shortopts = "m:"; 1255 1256 struct option md_longopts[] = 1257 { 1258 #define OPTION_CPU 257 1259 { "cpu", required_argument, NULL, OPTION_CPU }, 1260 #define OPTION_MACHINE 258 1261 { "machine", required_argument, NULL, OPTION_MACHINE }, 1262 #define OPTION_PIC 259 1263 { "pic", no_argument, NULL, OPTION_PIC }, 1264 { NULL, no_argument, NULL, 0 } 1265 }; 1266 1267 size_t md_longopts_size = sizeof (md_longopts); 1268 1269 /* Invocation line includes a switch not recognized by the base assembler. 1270 See if it's a processor-specific option. */ 1271 1272 int 1273 md_parse_option (int c, const char *arg) 1274 { 1275 init_defaults (); 1276 1277 switch (c) 1278 { 1279 case 'm': 1280 if (set_option (arg)) 1281 return 1; 1282 if (set_cpu_model (arg)) 1283 return 1; 1284 if (set_machine_model (arg)) 1285 return 1; 1286 break; 1287 1288 case OPTION_CPU: 1289 if (set_cpu_model (arg)) 1290 return 1; 1291 break; 1292 1293 case OPTION_MACHINE: 1294 if (set_machine_model (arg)) 1295 return 1; 1296 break; 1297 1298 case OPTION_PIC: 1299 if (set_option ("pic")) 1300 return 1; 1301 break; 1302 1303 default: 1304 break; 1305 } 1306 1307 return 0; 1308 } 1309 1310 void 1311 md_show_usage (FILE *stream) 1312 { 1313 fprintf (stream, "\ 1314 \n\ 1315 PDP-11 instruction set extensions:\n\ 1316 \n\ 1317 -m(no-)cis allow (disallow) commercial instruction set\n\ 1318 -m(no-)csm allow (disallow) CSM instruction\n\ 1319 -m(no-)eis allow (disallow) full extended instruction set\n\ 1320 -m(no-)fis allow (disallow) KEV11 floating-point instructions\n\ 1321 -m(no-)fpp allow (disallow) FP-11 floating-point instructions\n\ 1322 -m(no-)fpu allow (disallow) FP-11 floating-point instructions\n\ 1323 -m(no-)limited-eis allow (disallow) limited extended instruction set\n\ 1324 -m(no-)mfpt allow (disallow) processor type instruction\n\ 1325 -m(no-)multiproc allow (disallow) multiprocessor instructions\n\ 1326 -m(no-)mxps allow (disallow) processor status instructions\n\ 1327 -m(no-)spl allow (disallow) SPL instruction\n\ 1328 -m(no-)ucode allow (disallow) microcode instructions\n\ 1329 -mall-extensions allow all instruction set extensions\n\ 1330 (this is the default)\n\ 1331 -mno-extensions disallow all instruction set extensions\n\ 1332 -pic generate position-independent code\n\ 1333 \n\ 1334 PDP-11 CPU model options:\n\ 1335 \n\ 1336 -mka11* KA11 CPU. base line instruction set only\n\ 1337 -mkb11* KB11 CPU. enable full EIS and SPL\n\ 1338 -mkd11a* KD11-A CPU. enable limited EIS\n\ 1339 -mkd11b* KD11-B CPU. base line instruction set only\n\ 1340 -mkd11d* KD11-D CPU. base line instruction set only\n\ 1341 -mkd11e* KD11-E CPU. enable full EIS, MTPS, and MFPS\n\ 1342 -mkd11f* KD11-F CPU. enable limited EIS, MTPS, and MFPS\n\ 1343 -mkd11h* KD11-H CPU. enable limited EIS, MTPS, and MFPS\n\ 1344 -mkd11q* KD11-Q CPU. enable limited EIS, MTPS, and MFPS\n\ 1345 -mkd11k* KD11-K CPU. enable full EIS, MTPS, MFPS, LDUB, MED,\n\ 1346 XFC, and MFPT\n\ 1347 -mkd11z* KD11-Z CPU. enable full EIS, MTPS, MFPS, MFPT, SPL,\n\ 1348 and CSM\n\ 1349 -mf11* F11 CPU. enable full EIS, MFPS, MTPS, and MFPT\n\ 1350 -mj11* J11 CPU. enable full EIS, MTPS, MFPS, MFPT, SPL,\n\ 1351 CSM, TSTSET, and WRTLCK\n\ 1352 -mt11* T11 CPU. enable limited EIS, MTPS, and MFPS\n\ 1353 \n\ 1354 PDP-11 machine model options:\n\ 1355 \n\ 1356 -m11/03 same as -mkd11f\n\ 1357 -m11/04 same as -mkd11d\n\ 1358 -m11/05 same as -mkd11b\n\ 1359 -m11/10 same as -mkd11b\n\ 1360 -m11/15 same as -mka11\n\ 1361 -m11/20 same as -mka11\n\ 1362 -m11/21 same as -mt11\n\ 1363 -m11/23 same as -mf11\n\ 1364 -m11/24 same as -mf11\n\ 1365 -m11/34 same as -mkd11e\n\ 1366 -m11/34a same as -mkd11e -mfpp\n\ 1367 -m11/35 same as -mkd11a\n\ 1368 -m11/40 same as -mkd11a\n\ 1369 -m11/44 same as -mkd11z\n\ 1370 -m11/45 same as -mkb11\n\ 1371 -m11/50 same as -mkb11\n\ 1372 -m11/53 same as -mj11\n\ 1373 -m11/55 same as -mkb11\n\ 1374 -m11/60 same as -mkd11k\n\ 1375 -m11/70 same as -mkb11\n\ 1376 -m11/73 same as -mj11\n\ 1377 -m11/83 same as -mj11\n\ 1378 -m11/84 same as -mj11\n\ 1379 -m11/93 same as -mj11\n\ 1380 -m11/94 same as -mj11\n\ 1381 "); 1382 } 1383 1384 symbolS * 1385 md_undefined_symbol (char *name ATTRIBUTE_UNUSED) 1386 { 1387 return 0; 1388 } 1389 1390 valueT 1391 md_section_align (segT segment ATTRIBUTE_UNUSED, 1392 valueT size) 1393 { 1394 return (size + 1) & ~1; 1395 } 1396 1397 long 1398 md_pcrel_from (fixS *fixP) 1399 { 1400 return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size; 1401 } 1402 1403 /* Translate internal representation of relocation info to BFD target 1404 format. */ 1405 1406 arelent * 1407 tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, 1408 fixS *fixp) 1409 { 1410 arelent *reloc; 1411 bfd_reloc_code_real_type code; 1412 1413 reloc = XNEW (arelent); 1414 1415 reloc->sym_ptr_ptr = XNEW (asymbol *); 1416 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); 1417 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; 1418 1419 /* This is taken account for in md_apply_fix(). */ 1420 reloc->addend = -symbol_get_bfdsym (fixp->fx_addsy)->section->vma; 1421 1422 switch (fixp->fx_r_type) 1423 { 1424 case BFD_RELOC_16: 1425 if (fixp->fx_pcrel) 1426 code = BFD_RELOC_16_PCREL; 1427 else 1428 code = BFD_RELOC_16; 1429 break; 1430 1431 case BFD_RELOC_16_PCREL: 1432 code = BFD_RELOC_16_PCREL; 1433 break; 1434 1435 default: 1436 BAD_CASE (fixp->fx_r_type); 1437 return NULL; 1438 } 1439 1440 reloc->howto = bfd_reloc_type_lookup (stdoutput, code); 1441 1442 if (reloc->howto == NULL) 1443 { 1444 as_bad_where (fixp->fx_file, fixp->fx_line, 1445 _("Can not represent %s relocation in this object file format"), 1446 bfd_get_reloc_code_name (code)); 1447 return NULL; 1448 } 1449 1450 return reloc; 1451 } 1452 1453 void 1454 pseudo_bss (int c ATTRIBUTE_UNUSED) 1455 { 1456 int temp; 1457 1458 temp = get_absolute_expression (); 1459 subseg_set (bss_section, temp); 1460 demand_empty_rest_of_line (); 1461 } 1462 1463 void 1464 pseudo_even (int c ATTRIBUTE_UNUSED) 1465 { 1466 int alignment = 1; /* 2^1 */ 1467 frag_align (alignment, 0, 1); 1468 record_alignment (now_seg, alignment); 1469 } 1470 1471 const char * 1472 md_atof (int type, char * litP, int * sizeP) 1473 { 1474 return vax_md_atof (type, litP, sizeP); 1475 } 1476