1 /* tc-pdp11.c - pdp11-specific - 2 Copyright (C) 2001-2014 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 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 89 set_option (char *arg) 90 { 91 int yes = 1; 92 93 if (strcmp (arg, "all-extensions") == 0 94 || strcmp (arg, "all") == 0) 95 { 96 memset (pdp11_extension, ~0, sizeof pdp11_extension); 97 pdp11_extension[PDP11_NONE] = 0; 98 return 1; 99 } 100 else if (strcmp (arg, "no-extensions") == 0) 101 { 102 memset (pdp11_extension, 0, sizeof pdp11_extension); 103 pdp11_extension[PDP11_BASIC] = 1; 104 return 1; 105 } 106 107 if (strncmp (arg, "no-", 3) == 0) 108 { 109 yes = 0; 110 arg += 3; 111 } 112 113 /* Commersial instructions. */ 114 if (strcmp (arg, "cis") == 0) 115 pdp11_extension[PDP11_CIS] = yes; 116 /* Call supervisor mode. */ 117 else if (strcmp (arg, "csm") == 0) 118 pdp11_extension[PDP11_CSM] = yes; 119 /* Extended instruction set. */ 120 else if (strcmp (arg, "eis") == 0) 121 pdp11_extension[PDP11_EIS] = pdp11_extension[PDP11_LEIS] = yes; 122 /* KEV11 floating-point. */ 123 else if (strcmp (arg, "fis") == 0 124 || strcmp (arg, "kev11") == 0 125 || strcmp (arg, "kev-11") == 0) 126 pdp11_extension[PDP11_FIS] = yes; 127 /* FP-11 floating-point. */ 128 else if (strcmp (arg, "fpp") == 0 129 || strcmp (arg, "fpu") == 0 130 || strcmp (arg, "fp11") == 0 131 || strcmp (arg, "fp-11") == 0 132 || strcmp (arg, "fpj11") == 0 133 || strcmp (arg, "fp-j11") == 0 134 || strcmp (arg, "fpj-11") == 0) 135 pdp11_extension[PDP11_FPP] = yes; 136 /* Limited extended insns. */ 137 else if (strcmp (arg, "limited-eis") == 0) 138 { 139 pdp11_extension[PDP11_LEIS] = yes; 140 if (!pdp11_extension[PDP11_LEIS]) 141 pdp11_extension[PDP11_EIS] = 0; 142 } 143 /* Move from processor type. */ 144 else if (strcmp (arg, "mfpt") == 0) 145 pdp11_extension[PDP11_MFPT] = yes; 146 /* Multiprocessor insns: */ 147 else if (strncmp (arg, "mproc", 5) == 0 148 /* TSTSET, WRTLCK */ 149 || strncmp (arg, "multiproc", 9) == 0) 150 pdp11_extension[PDP11_MPROC] = yes; 151 /* Move from/to proc status. */ 152 else if (strcmp (arg, "mxps") == 0) 153 pdp11_extension[PDP11_MXPS] = yes; 154 /* Position-independent code. */ 155 else if (strcmp (arg, "pic") == 0) 156 asm_option[ASM_OPT_PIC] = yes; 157 /* Set priority level. */ 158 else if (strcmp (arg, "spl") == 0) 159 pdp11_extension[PDP11_SPL] = yes; 160 /* Microcode instructions: */ 161 else if (strcmp (arg, "ucode") == 0 162 /* LDUB, MED, XFC */ 163 || strcmp (arg, "microcode") == 0) 164 pdp11_extension[PDP11_UCODE] = yes; 165 else 166 return 0; 167 168 return 1; 169 } 170 171 172 static void 173 init_defaults (void) 174 { 175 static int first = 1; 176 177 if (first) 178 { 179 set_option ("all-extensions"); 180 set_option ("pic"); 181 first = 0; 182 } 183 } 184 185 void 186 md_begin (void) 187 { 188 int i; 189 190 init_defaults (); 191 192 insn_hash = hash_new (); 193 if (insn_hash == NULL) 194 as_fatal (_("Virtual memory exhausted")); 195 196 for (i = 0; i < pdp11_num_opcodes; i++) 197 hash_insert (insn_hash, pdp11_opcodes[i].name, (void *) (pdp11_opcodes + i)); 198 for (i = 0; i < pdp11_num_aliases; i++) 199 hash_insert (insn_hash, pdp11_aliases[i].name, (void *) (pdp11_aliases + i)); 200 } 201 202 void 203 md_number_to_chars (char con[], valueT value, int nbytes) 204 { 205 /* On a PDP-11, 0x1234 is stored as "\x12\x34", and 206 0x12345678 is stored as "\x56\x78\x12\x34". It's 207 anyones guess what 0x123456 would be stored like. */ 208 209 switch (nbytes) 210 { 211 case 0: 212 break; 213 case 1: 214 con[0] = value & 0xff; 215 break; 216 case 2: 217 con[0] = value & 0xff; 218 con[1] = (value >> 8) & 0xff; 219 break; 220 case 4: 221 con[0] = (value >> 16) & 0xff; 222 con[1] = (value >> 24) & 0xff; 223 con[2] = value & 0xff; 224 con[3] = (value >> 8) & 0xff; 225 break; 226 default: 227 BAD_CASE (nbytes); 228 } 229 } 230 231 /* Fix up some data or instructions after we find out the value of a symbol 232 that they reference. Knows about order of bytes in address. */ 233 234 void 235 md_apply_fix (fixS *fixP, 236 valueT * valP, 237 segT seg ATTRIBUTE_UNUSED) 238 { 239 valueT code; 240 valueT mask; 241 valueT val = * valP; 242 char *buf; 243 int shift; 244 int size; 245 246 buf = fixP->fx_where + fixP->fx_frag->fr_literal; 247 size = fixP->fx_size; 248 code = md_chars_to_number ((unsigned char *) buf, size); 249 250 switch (fixP->fx_r_type) 251 { 252 case BFD_RELOC_16: 253 case BFD_RELOC_16_PCREL: 254 mask = 0xffff; 255 shift = 0; 256 break; 257 case BFD_RELOC_PDP11_DISP_8_PCREL: 258 mask = 0x00ff; 259 shift = 1; 260 break; 261 case BFD_RELOC_PDP11_DISP_6_PCREL: 262 mask = 0x003f; 263 shift = 1; 264 val = -val; 265 break; 266 default: 267 BAD_CASE (fixP->fx_r_type); 268 } 269 270 if (fixP->fx_addsy != NULL) 271 val += symbol_get_bfdsym (fixP->fx_addsy)->section->vma; 272 /* *value += fixP->fx_addsy->bsym->section->vma; */ 273 274 code &= ~mask; 275 code |= (val >> shift) & mask; 276 number_to_chars_littleendian (buf, code, size); 277 278 if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) 279 fixP->fx_done = 1; 280 } 281 282 long 283 md_chars_to_number (con, nbytes) 284 unsigned char con[]; /* Low order byte 1st. */ 285 int nbytes; /* Number of bytes in the input. */ 286 { 287 /* On a PDP-11, 0x1234 is stored as "\x12\x34", and 288 0x12345678 is stored as "\x56\x78\x12\x34". It's 289 anyones guess what 0x123456 would be stored like. */ 290 switch (nbytes) 291 { 292 case 0: 293 return 0; 294 case 1: 295 return con[0]; 296 case 2: 297 return (con[1] << BITS_PER_CHAR) | con[0]; 298 case 4: 299 return 300 (((con[1] << BITS_PER_CHAR) | con[0]) << (2 * BITS_PER_CHAR)) 301 |((con[3] << BITS_PER_CHAR) | con[2]); 302 default: 303 BAD_CASE (nbytes); 304 return 0; 305 } 306 } 307 308 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 { 358 operand->error = _("Bad register name"); 359 return str; 360 } 361 362 return str; 363 } 364 365 static char * 366 parse_ac5 (char *str, struct pdp11_code *operand) 367 { 368 str = skip_whitespace (str); 369 if (strncmp (str, "fr", 2) == 0 370 || strncmp (str, "FR", 2) == 0 371 || strncmp (str, "ac", 2) == 0 372 || strncmp (str, "AC", 2) == 0) 373 { 374 str += 2; 375 switch (*str) 376 { 377 case '0': case '1': case '2': case '3': 378 case '4': case '5': 379 operand->code = *str - '0'; 380 str++; 381 break; 382 default: 383 operand->error = _("Bad register name"); 384 return str - 2; 385 } 386 } 387 else 388 { 389 operand->error = _("Bad register name"); 390 return str; 391 } 392 393 return str; 394 } 395 396 static char * 397 parse_ac (char *str, struct pdp11_code *operand) 398 { 399 str = parse_ac5 (str, operand); 400 if (!operand->error && operand->code > 3) 401 { 402 operand->error = _("Bad register name"); 403 return str - 3; 404 } 405 406 return str; 407 } 408 409 static char * 410 parse_expression (char *str, struct pdp11_code *operand) 411 { 412 char *save_input_line_pointer; 413 segT seg; 414 415 save_input_line_pointer = input_line_pointer; 416 input_line_pointer = str; 417 seg = expression (&operand->reloc.exp); 418 if (seg == NULL) 419 { 420 input_line_pointer = save_input_line_pointer; 421 operand->error = _("Error in expression"); 422 return str; 423 } 424 425 str = input_line_pointer; 426 input_line_pointer = save_input_line_pointer; 427 428 operand->reloc.pc_rel = 0; 429 430 return str; 431 } 432 433 static char * 434 parse_op_no_deferred (char *str, struct pdp11_code *operand) 435 { 436 LITTLENUM_TYPE literal_float[2]; 437 438 str = skip_whitespace (str); 439 440 switch (*str) 441 { 442 case '(': /* (rn) and (rn)+ */ 443 str = parse_reg (str + 1, operand); 444 if (operand->error) 445 return str; 446 str = skip_whitespace (str); 447 if (*str != ')') 448 { 449 operand->error = _("Missing ')'"); 450 return str; 451 } 452 str++; 453 if (*str == '+') 454 { 455 operand->code |= 020; 456 str++; 457 } 458 else 459 { 460 operand->code |= 010; 461 } 462 break; 463 464 /* Immediate. */ 465 case '#': 466 case '$': 467 str = parse_expression (str + 1, operand); 468 if (operand->error) 469 return str; 470 operand->additional = TRUE; 471 operand->word = operand->reloc.exp.X_add_number; 472 switch (operand->reloc.exp.X_op) 473 { 474 case O_constant: 475 break; 476 case O_symbol: 477 case O_add: 478 case O_subtract: 479 operand->reloc.type = BFD_RELOC_16; 480 operand->reloc.pc_rel = 0; 481 break; 482 case O_big: 483 if (operand->reloc.exp.X_add_number > 0) 484 { 485 operand->error = _("Error in expression"); 486 break; 487 } 488 /* It's a floating literal... */ 489 know (operand->reloc.exp.X_add_number < 0); 490 flonum_gen2vax ('f', &generic_floating_point_number, literal_float); 491 operand->word = literal_float[0]; 492 if (literal_float[1] != 0) 493 as_warn (_("Low order bits truncated in immediate float operand")); 494 break; 495 default: 496 operand->error = _("Error in expression"); 497 break; 498 } 499 operand->code = 027; 500 break; 501 502 /* label, d(rn), -(rn) */ 503 default: 504 { 505 if (strncmp (str, "-(", 2) == 0) /* -(rn) */ 506 { 507 str = parse_reg (str + 2, operand); 508 if (operand->error) 509 return str; 510 str = skip_whitespace (str); 511 if (*str != ')') 512 { 513 operand->error = _("Missing ')'"); 514 return str; 515 } 516 operand->code |= 040; 517 str++; 518 break; 519 } 520 521 str = parse_expression (str, operand); 522 if (operand->error) 523 return str; 524 525 str = skip_whitespace (str); 526 527 if (*str != '(') 528 { 529 operand->code = 067; 530 operand->additional = 1; 531 operand->word = 0; 532 operand->reloc.type = BFD_RELOC_16_PCREL; 533 operand->reloc.pc_rel = 1; 534 break; 535 } 536 537 /* d(rn) */ 538 str++; 539 str = parse_reg (str, operand); 540 if (operand->error) 541 return str; 542 543 str = skip_whitespace (str); 544 545 if (*str != ')') 546 { 547 operand->error = _("Missing ')'"); 548 return str; 549 } 550 551 str++; 552 operand->additional = TRUE; 553 operand->code |= 060; 554 switch (operand->reloc.exp.X_op) 555 { 556 case O_symbol: 557 operand->reloc.type = BFD_RELOC_16; 558 operand->reloc.pc_rel = 0; 559 break; 560 case O_constant: 561 if ((operand->code & 7) == 7) 562 { 563 operand->reloc.pc_rel = 1; 564 operand->word = operand->reloc.exp.X_add_number; 565 } 566 else 567 operand->word = operand->reloc.exp.X_add_number; 568 569 break; 570 default: 571 BAD_CASE (operand->reloc.exp.X_op); 572 } 573 break; 574 } 575 } 576 577 return str; 578 } 579 580 static char * 581 parse_op_noreg (char *str, struct pdp11_code *operand) 582 { 583 str = skip_whitespace (str); 584 operand->error = NULL; 585 586 if (*str == '@' || *str == '*') 587 { 588 str = parse_op_no_deferred (str + 1, operand); 589 if (operand->error) 590 return str; 591 operand->code |= 010; 592 } 593 else 594 str = parse_op_no_deferred (str, operand); 595 596 return str; 597 } 598 599 static char * 600 parse_op (char *str, struct pdp11_code *operand) 601 { 602 str = skip_whitespace (str); 603 604 str = parse_reg (str, operand); 605 if (!operand->error) 606 return str; 607 608 operand->error = NULL; 609 parse_ac5 (str, operand); 610 if (!operand->error) 611 { 612 operand->error = _("Float AC not legal as integer operand"); 613 return str; 614 } 615 616 return parse_op_noreg (str, operand); 617 } 618 619 static char * 620 parse_fop (char *str, struct pdp11_code *operand) 621 { 622 str = skip_whitespace (str); 623 624 str = parse_ac5 (str, operand); 625 if (!operand->error) 626 return str; 627 628 operand->error = NULL; 629 parse_reg (str, operand); 630 if (!operand->error) 631 { 632 operand->error = _("General register not legal as float operand"); 633 return str; 634 } 635 636 return parse_op_noreg (str, operand); 637 } 638 639 static char * 640 parse_separator (char *str, int *error) 641 { 642 str = skip_whitespace (str); 643 *error = (*str != ','); 644 if (!*error) 645 str++; 646 return str; 647 } 648 649 void 650 md_assemble (char *instruction_string) 651 { 652 const struct pdp11_opcode *op; 653 struct pdp11_code insn, op1, op2; 654 int error; 655 int size; 656 char *err = NULL; 657 char *str; 658 char *p; 659 char c; 660 661 str = skip_whitespace (instruction_string); 662 p = find_whitespace (str); 663 if (p - str == 0) 664 { 665 as_bad (_("No instruction found")); 666 return; 667 } 668 669 c = *p; 670 *p = '\0'; 671 op = (struct pdp11_opcode *)hash_find (insn_hash, str); 672 *p = c; 673 if (op == 0) 674 { 675 as_bad (_("Unknown instruction '%s'"), str); 676 return; 677 } 678 679 if (!pdp11_extension[op->extension]) 680 { 681 as_warn (_("Unsupported instruction set extension: %s"), op->name); 682 return; 683 } 684 685 insn.error = NULL; 686 insn.code = op->opcode; 687 insn.reloc.type = BFD_RELOC_NONE; 688 op1.error = NULL; 689 op1.additional = FALSE; 690 op1.reloc.type = BFD_RELOC_NONE; 691 op2.error = NULL; 692 op2.additional = FALSE; 693 op2.reloc.type = BFD_RELOC_NONE; 694 695 str = p; 696 size = 2; 697 698 switch (op->type) 699 { 700 case PDP11_OPCODE_NO_OPS: 701 str = skip_whitespace (str); 702 if (*str == 0) 703 str = ""; 704 break; 705 706 case PDP11_OPCODE_IMM3: 707 case PDP11_OPCODE_IMM6: 708 case PDP11_OPCODE_IMM8: 709 str = skip_whitespace (str); 710 if (*str == '#' || *str == '$') 711 str++; 712 str = parse_expression (str, &op1); 713 if (op1.error) 714 break; 715 if (op1.reloc.exp.X_op != O_constant || op1.reloc.type != BFD_RELOC_NONE) 716 { 717 op1.error = _("operand is not an absolute constant"); 718 break; 719 } 720 switch (op->type) 721 { 722 case PDP11_OPCODE_IMM3: 723 if (op1.reloc.exp.X_add_number & ~7) 724 { 725 op1.error = _("3-bit immediate out of range"); 726 break; 727 } 728 break; 729 case PDP11_OPCODE_IMM6: 730 if (op1.reloc.exp.X_add_number & ~0x3f) 731 { 732 op1.error = _("6-bit immediate out of range"); 733 break; 734 } 735 break; 736 case PDP11_OPCODE_IMM8: 737 if (op1.reloc.exp.X_add_number & ~0xff) 738 { 739 op1.error = _("8-bit immediate out of range"); 740 break; 741 } 742 break; 743 } 744 insn.code |= op1.reloc.exp.X_add_number; 745 break; 746 747 case PDP11_OPCODE_DISPL: 748 { 749 char *new_pointer; 750 new_pointer = parse_expression (str, &op1); 751 op1.code = 0; 752 op1.reloc.pc_rel = 1; 753 op1.reloc.type = BFD_RELOC_PDP11_DISP_8_PCREL; 754 if (op1.reloc.exp.X_op != O_symbol) 755 { 756 op1.error = _("Symbol expected"); 757 break; 758 } 759 if (op1.code & ~0xff) 760 { 761 err = _("8-bit displacement out of range"); 762 break; 763 } 764 str = new_pointer; 765 insn.code |= op1.code; 766 insn.reloc = op1.reloc; 767 } 768 break; 769 770 case PDP11_OPCODE_REG: 771 str = parse_reg (str, &op1); 772 if (op1.error) 773 break; 774 insn.code |= op1.code; 775 break; 776 777 case PDP11_OPCODE_OP: 778 str = parse_op (str, &op1); 779 if (op1.error) 780 break; 781 insn.code |= op1.code; 782 if (op1.additional) 783 size += 2; 784 break; 785 786 case PDP11_OPCODE_FOP: 787 str = parse_fop (str, &op1); 788 if (op1.error) 789 break; 790 insn.code |= op1.code; 791 if (op1.additional) 792 size += 2; 793 break; 794 795 case PDP11_OPCODE_REG_OP: 796 str = parse_reg (str, &op2); 797 if (op2.error) 798 break; 799 insn.code |= op2.code << 6; 800 str = parse_separator (str, &error); 801 if (error) 802 { 803 op2.error = _("Missing ','"); 804 break; 805 } 806 str = parse_op (str, &op1); 807 if (op1.error) 808 break; 809 insn.code |= op1.code; 810 if (op1.additional) 811 size += 2; 812 break; 813 814 case PDP11_OPCODE_REG_OP_REV: 815 str = parse_op (str, &op1); 816 if (op1.error) 817 break; 818 insn.code |= op1.code; 819 if (op1.additional) 820 size += 2; 821 str = parse_separator (str, &error); 822 if (error) 823 { 824 op2.error = _("Missing ','"); 825 break; 826 } 827 str = parse_reg (str, &op2); 828 if (op2.error) 829 break; 830 insn.code |= op2.code << 6; 831 break; 832 833 case PDP11_OPCODE_AC_FOP: 834 str = parse_ac (str, &op2); 835 if (op2.error) 836 break; 837 insn.code |= op2.code << 6; 838 str = parse_separator (str, &error); 839 if (error) 840 { 841 op1.error = _("Missing ','"); 842 break; 843 } 844 str = parse_fop (str, &op1); 845 if (op1.error) 846 break; 847 insn.code |= op1.code; 848 if (op1.additional) 849 size += 2; 850 break; 851 852 case PDP11_OPCODE_FOP_AC: 853 str = parse_fop (str, &op1); 854 if (op1.error) 855 break; 856 insn.code |= op1.code; 857 if (op1.additional) 858 size += 2; 859 str = parse_separator (str, &error); 860 if (error) 861 { 862 op1.error = _("Missing ','"); 863 break; 864 } 865 str = parse_ac (str, &op2); 866 if (op2.error) 867 break; 868 insn.code |= op2.code << 6; 869 break; 870 871 case PDP11_OPCODE_AC_OP: 872 str = parse_ac (str, &op2); 873 if (op2.error) 874 break; 875 insn.code |= op2.code << 6; 876 str = parse_separator (str, &error); 877 if (error) 878 { 879 op1.error = _("Missing ','"); 880 break; 881 } 882 str = parse_op (str, &op1); 883 if (op1.error) 884 break; 885 insn.code |= op1.code; 886 if (op1.additional) 887 size += 2; 888 break; 889 890 case PDP11_OPCODE_OP_AC: 891 str = parse_op (str, &op1); 892 if (op1.error) 893 break; 894 insn.code |= op1.code; 895 if (op1.additional) 896 size += 2; 897 str = parse_separator (str, &error); 898 if (error) 899 { 900 op1.error = _("Missing ','"); 901 break; 902 } 903 str = parse_ac (str, &op2); 904 if (op2.error) 905 break; 906 insn.code |= op2.code << 6; 907 break; 908 909 case PDP11_OPCODE_OP_OP: 910 str = parse_op (str, &op1); 911 if (op1.error) 912 break; 913 insn.code |= op1.code << 6; 914 if (op1.additional) 915 size += 2; 916 str = parse_separator (str, &error); 917 if (error) 918 { 919 op2.error = _("Missing ','"); 920 break; 921 } 922 str = parse_op (str, &op2); 923 if (op2.error) 924 break; 925 insn.code |= op2.code; 926 if (op2.additional) 927 size += 2; 928 break; 929 930 case PDP11_OPCODE_REG_DISPL: 931 { 932 char *new_pointer; 933 str = parse_reg (str, &op2); 934 if (op2.error) 935 break; 936 insn.code |= op2.code << 6; 937 str = parse_separator (str, &error); 938 if (error) 939 { 940 op1.error = _("Missing ','"); 941 break; 942 } 943 new_pointer = parse_expression (str, &op1); 944 op1.code = 0; 945 op1.reloc.pc_rel = 1; 946 op1.reloc.type = BFD_RELOC_PDP11_DISP_6_PCREL; 947 if (op1.reloc.exp.X_op != O_symbol) 948 { 949 op1.error = _("Symbol expected"); 950 break; 951 } 952 if (op1.code & ~0x3f) 953 { 954 err = _("6-bit displacement out of range"); 955 break; 956 } 957 str = new_pointer; 958 insn.code |= op1.code; 959 insn.reloc = op1.reloc; 960 } 961 break; 962 963 default: 964 BAD_CASE (op->type); 965 } 966 967 if (op1.error) 968 err = op1.error; 969 else if (op2.error) 970 err = op2.error; 971 else 972 { 973 str = skip_whitespace (str); 974 if (*str) 975 err = _("Too many operands"); 976 } 977 978 { 979 char *to = NULL; 980 981 if (err) 982 { 983 as_bad ("%s", err); 984 return; 985 } 986 987 to = frag_more (size); 988 989 md_number_to_chars (to, insn.code, 2); 990 if (insn.reloc.type != BFD_RELOC_NONE) 991 fix_new_exp (frag_now, to - frag_now->fr_literal, 2, 992 &insn.reloc.exp, insn.reloc.pc_rel, insn.reloc.type); 993 to += 2; 994 995 if (op1.additional) 996 { 997 md_number_to_chars (to, op1.word, 2); 998 if (op1.reloc.type != BFD_RELOC_NONE) 999 fix_new_exp (frag_now, to - frag_now->fr_literal, 2, 1000 &op1.reloc.exp, op1.reloc.pc_rel, op1.reloc.type); 1001 to += 2; 1002 } 1003 1004 if (op2.additional) 1005 { 1006 md_number_to_chars (to, op2.word, 2); 1007 if (op2.reloc.type != BFD_RELOC_NONE) 1008 fix_new_exp (frag_now, to - frag_now->fr_literal, 2, 1009 &op2.reloc.exp, op2.reloc.pc_rel, op2.reloc.type); 1010 } 1011 } 1012 } 1013 1014 int 1015 md_estimate_size_before_relax (fragS *fragP ATTRIBUTE_UNUSED, 1016 segT segment ATTRIBUTE_UNUSED) 1017 { 1018 return 0; 1019 } 1020 1021 void 1022 md_convert_frag (bfd *headers ATTRIBUTE_UNUSED, 1023 segT seg ATTRIBUTE_UNUSED, 1024 fragS *fragP ATTRIBUTE_UNUSED) 1025 { 1026 } 1027 1028 int md_short_jump_size = 2; 1029 int md_long_jump_size = 4; 1030 1031 void 1032 md_create_short_jump (char *ptr ATTRIBUTE_UNUSED, 1033 addressT from_addr ATTRIBUTE_UNUSED, 1034 addressT to_addr ATTRIBUTE_UNUSED, 1035 fragS *frag ATTRIBUTE_UNUSED, 1036 symbolS *to_symbol ATTRIBUTE_UNUSED) 1037 { 1038 } 1039 1040 void 1041 md_create_long_jump (char *ptr ATTRIBUTE_UNUSED, 1042 addressT from_addr ATTRIBUTE_UNUSED, 1043 addressT to_addr ATTRIBUTE_UNUSED, 1044 fragS *frag ATTRIBUTE_UNUSED, 1045 symbolS *to_symbol ATTRIBUTE_UNUSED) 1046 { 1047 } 1048 1049 static int 1050 set_cpu_model (char *arg) 1051 { 1052 char buf[4]; 1053 char *model = buf; 1054 1055 if (arg[0] == 'k') 1056 arg++; 1057 1058 *model++ = *arg++; 1059 1060 if (strchr ("abdx", model[-1]) == NULL) 1061 return 0; 1062 1063 if (model[-1] == 'd') 1064 { 1065 if (arg[0] == 'f' || arg[0] == 'j') 1066 model[-1] = *arg++; 1067 } 1068 else if (model[-1] == 'x') 1069 { 1070 if (arg[0] == 't') 1071 model[-1] = *arg++; 1072 } 1073 1074 if (arg[0] == '-') 1075 arg++; 1076 1077 if (strncmp (arg, "11", 2) != 0) 1078 return 0; 1079 arg += 2; 1080 1081 if (arg[0] == '-') 1082 { 1083 if (*++arg == 0) 1084 return 0; 1085 } 1086 1087 /* Allow up to two revision letters. */ 1088 if (arg[0] != 0) 1089 *model++ = *arg++; 1090 if (arg[0] != 0) 1091 *model++ = *arg++; 1092 1093 *model++ = 0; 1094 1095 set_option ("no-extensions"); 1096 1097 /* KA11 (11/15/20). */ 1098 if (strncmp (buf, "a", 1) == 0) 1099 return 1; /* No extensions. */ 1100 1101 /* KB11 (11/45/50/55/70). */ 1102 else if (strncmp (buf, "b", 1) == 0) 1103 return set_option ("eis") && set_option ("spl"); 1104 1105 /* KD11-A (11/35/40). */ 1106 else if (strncmp (buf, "da", 2) == 0) 1107 return set_option ("limited-eis"); 1108 1109 /* KD11-B (11/05/10). */ 1110 else if (strncmp (buf, "db", 2) == 0 1111 /* KD11-D (11/04). */ 1112 || strncmp (buf, "dd", 2) == 0) 1113 return 1; /* no extensions */ 1114 1115 /* KD11-E (11/34). */ 1116 else if (strncmp (buf, "de", 2) == 0) 1117 return set_option ("eis") && set_option ("mxps"); 1118 1119 /* KD11-F (11/03). */ 1120 else if (strncmp (buf, "df", 2) == 0 1121 /* KD11-H (11/03). */ 1122 || strncmp (buf, "dh", 2) == 0 1123 /* KD11-Q (11/03). */ 1124 || strncmp (buf, "dq", 2) == 0) 1125 return set_option ("limited-eis") && set_option ("mxps"); 1126 1127 /* KD11-K (11/60). */ 1128 else if (strncmp (buf, "dk", 2) == 0) 1129 return set_option ("eis") 1130 && set_option ("mxps") 1131 && set_option ("ucode"); 1132 1133 /* KD11-Z (11/44). */ 1134 else if (strncmp (buf, "dz", 2) == 0) 1135 return set_option ("csm") 1136 && set_option ("eis") 1137 && set_option ("mfpt") 1138 && set_option ("mxps") 1139 && set_option ("spl"); 1140 1141 /* F11 (11/23/24). */ 1142 else if (strncmp (buf, "f", 1) == 0) 1143 return set_option ("eis") 1144 && set_option ("mfpt") 1145 && set_option ("mxps"); 1146 1147 /* J11 (11/53/73/83/84/93/94). */ 1148 else if (strncmp (buf, "j", 1) == 0) 1149 return set_option ("csm") 1150 && set_option ("eis") 1151 && set_option ("mfpt") 1152 && set_option ("multiproc") 1153 && set_option ("mxps") 1154 && set_option ("spl"); 1155 1156 /* T11 (11/21). */ 1157 else if (strncmp (buf, "t", 1) == 0) 1158 return set_option ("limited-eis") 1159 && set_option ("mxps"); 1160 1161 else 1162 return 0; 1163 } 1164 1165 static int 1166 set_machine_model (char *arg) 1167 { 1168 if (strncmp (arg, "pdp-11/", 7) != 0 1169 && strncmp (arg, "pdp11/", 6) != 0 1170 && strncmp (arg, "11/", 3) != 0) 1171 return 0; 1172 1173 if (strncmp (arg, "pdp", 3) == 0) 1174 arg += 3; 1175 if (arg[0] == '-') 1176 arg++; 1177 if (strncmp (arg, "11/", 3) == 0) 1178 arg += 3; 1179 1180 if (strcmp (arg, "03") == 0) 1181 return set_cpu_model ("kd11f"); 1182 1183 else if (strcmp (arg, "04") == 0) 1184 return set_cpu_model ("kd11d"); 1185 1186 else if (strcmp (arg, "05") == 0 1187 || strcmp (arg, "10") == 0) 1188 return set_cpu_model ("kd11b"); 1189 1190 else if (strcmp (arg, "15") == 0 1191 || strcmp (arg, "20") == 0) 1192 return set_cpu_model ("ka11"); 1193 1194 else if (strcmp (arg, "21") == 0) 1195 return set_cpu_model ("t11"); 1196 1197 else if (strcmp (arg, "23") == 0 1198 || strcmp (arg, "24") == 0) 1199 return set_cpu_model ("f11"); 1200 1201 else if (strcmp (arg, "34") == 0 1202 || strcmp (arg, "34a") == 0) 1203 return set_cpu_model ("kd11e"); 1204 1205 else if (strcmp (arg, "35") == 0 1206 || strcmp (arg, "40") == 0) 1207 return set_cpu_model ("kd11da"); 1208 1209 else if (strcmp (arg, "44") == 0) 1210 return set_cpu_model ("kd11dz"); 1211 1212 else if (strcmp (arg, "45") == 0 1213 || strcmp (arg, "50") == 0 1214 || strcmp (arg, "55") == 0 1215 || strcmp (arg, "70") == 0) 1216 return set_cpu_model ("kb11"); 1217 1218 else if (strcmp (arg, "60") == 0) 1219 return set_cpu_model ("kd11k"); 1220 1221 else if (strcmp (arg, "53") == 0 1222 || strcmp (arg, "73") == 0 1223 || strcmp (arg, "83") == 0 1224 || strcmp (arg, "84") == 0 1225 || strcmp (arg, "93") == 0 1226 || strcmp (arg, "94") == 0) 1227 return set_cpu_model ("j11") 1228 && set_option ("fpp"); 1229 1230 else 1231 return 0; 1232 } 1233 1234 const char *md_shortopts = "m:"; 1235 1236 struct option md_longopts[] = 1237 { 1238 #define OPTION_CPU 257 1239 { "cpu", required_argument, NULL, OPTION_CPU }, 1240 #define OPTION_MACHINE 258 1241 { "machine", required_argument, NULL, OPTION_MACHINE }, 1242 #define OPTION_PIC 259 1243 { "pic", no_argument, NULL, OPTION_PIC }, 1244 { NULL, no_argument, NULL, 0 } 1245 }; 1246 1247 size_t md_longopts_size = sizeof (md_longopts); 1248 1249 /* Invocation line includes a switch not recognized by the base assembler. 1250 See if it's a processor-specific option. */ 1251 1252 int 1253 md_parse_option (int c, char *arg) 1254 { 1255 init_defaults (); 1256 1257 switch (c) 1258 { 1259 case 'm': 1260 if (set_option (arg)) 1261 return 1; 1262 if (set_cpu_model (arg)) 1263 return 1; 1264 if (set_machine_model (arg)) 1265 return 1; 1266 break; 1267 1268 case OPTION_CPU: 1269 if (set_cpu_model (arg)) 1270 return 1; 1271 break; 1272 1273 case OPTION_MACHINE: 1274 if (set_machine_model (arg)) 1275 return 1; 1276 break; 1277 1278 case OPTION_PIC: 1279 if (set_option ("pic")) 1280 return 1; 1281 break; 1282 1283 default: 1284 break; 1285 } 1286 1287 return 0; 1288 } 1289 1290 void 1291 md_show_usage (FILE *stream) 1292 { 1293 fprintf (stream, "\ 1294 \n\ 1295 PDP-11 instruction set extentions:\n\ 1296 \n\ 1297 -m(no-)cis allow (disallow) commersial instruction set\n\ 1298 -m(no-)csm allow (disallow) CSM instruction\n\ 1299 -m(no-)eis allow (disallow) full extended instruction set\n\ 1300 -m(no-)fis allow (disallow) KEV11 floating-point instructions\n\ 1301 -m(no-)fpp allow (disallow) FP-11 floating-point instructions\n\ 1302 -m(no-)fpu allow (disallow) FP-11 floating-point instructions\n\ 1303 -m(no-)limited-eis allow (disallow) limited extended instruction set\n\ 1304 -m(no-)mfpt allow (disallow) processor type instruction\n\ 1305 -m(no-)multiproc allow (disallow) multiprocessor instructions\n\ 1306 -m(no-)mxps allow (disallow) processor status instructions\n\ 1307 -m(no-)spl allow (disallow) SPL instruction\n\ 1308 -m(no-)ucode allow (disallow) microcode instructions\n\ 1309 -mall-extensions allow all instruction set extensions\n\ 1310 (this is the default)\n\ 1311 -mno-extentions disallow all instruction set extensions\n\ 1312 -pic generate position-indepenent code\n\ 1313 \n\ 1314 PDP-11 CPU model options:\n\ 1315 \n\ 1316 -mka11* KA11 CPU. base line instruction set only\n\ 1317 -mkb11* KB11 CPU. enable full EIS and SPL\n\ 1318 -mkd11a* KD11-A CPU. enable limited EIS\n\ 1319 -mkd11b* KD11-B CPU. base line instruction set only\n\ 1320 -mkd11d* KD11-D CPU. base line instruction set only\n\ 1321 -mkd11e* KD11-E CPU. enable full EIS, MTPS, and MFPS\n\ 1322 -mkd11f* KD11-F CPU. enable limited EIS, MTPS, and MFPS\n\ 1323 -mkd11h* KD11-H CPU. enable limited EIS, MTPS, and MFPS\n\ 1324 -mkd11q* KD11-Q CPU. enable limited EIS, MTPS, and MFPS\n\ 1325 -mkd11k* KD11-K CPU. enable full EIS, MTPS, MFPS, LDUB, MED,\n\ 1326 XFC, and MFPT\n\ 1327 -mkd11z* KD11-Z CPU. enable full EIS, MTPS, MFPS, MFPT, SPL,\n\ 1328 and CSM\n\ 1329 -mf11* F11 CPU. enable full EIS, MFPS, MTPS, and MFPT\n\ 1330 -mj11* J11 CPU. enable full EIS, MTPS, MFPS, MFPT, SPL,\n\ 1331 CSM, TSTSET, and WRTLCK\n\ 1332 -mt11* T11 CPU. enable limited EIS, MTPS, and MFPS\n\ 1333 \n\ 1334 PDP-11 machine model options:\n\ 1335 \n\ 1336 -m11/03 same as -mkd11f\n\ 1337 -m11/04 same as -mkd11d\n\ 1338 -m11/05 same as -mkd11b\n\ 1339 -m11/10 same as -mkd11b\n\ 1340 -m11/15 same as -mka11\n\ 1341 -m11/20 same as -mka11\n\ 1342 -m11/21 same as -mt11\n\ 1343 -m11/23 same as -mf11\n\ 1344 -m11/24 same as -mf11\n\ 1345 -m11/34 same as -mkd11e\n\ 1346 -m11/34a same as -mkd11e -mfpp\n\ 1347 -m11/35 same as -mkd11a\n\ 1348 -m11/40 same as -mkd11a\n\ 1349 -m11/44 same as -mkd11z\n\ 1350 -m11/45 same as -mkb11\n\ 1351 -m11/50 same as -mkb11\n\ 1352 -m11/53 same as -mj11\n\ 1353 -m11/55 same as -mkb11\n\ 1354 -m11/60 same as -mkd11k\n\ 1355 -m11/70 same as -mkb11\n\ 1356 -m11/73 same as -mj11\n\ 1357 -m11/83 same as -mj11\n\ 1358 -m11/84 same as -mj11\n\ 1359 -m11/93 same as -mj11\n\ 1360 -m11/94 same as -mj11\n\ 1361 "); 1362 } 1363 1364 symbolS * 1365 md_undefined_symbol (char *name ATTRIBUTE_UNUSED) 1366 { 1367 return 0; 1368 } 1369 1370 valueT 1371 md_section_align (segT segment ATTRIBUTE_UNUSED, 1372 valueT size) 1373 { 1374 return (size + 1) & ~1; 1375 } 1376 1377 long 1378 md_pcrel_from (fixS *fixP) 1379 { 1380 return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size; 1381 } 1382 1383 /* Translate internal representation of relocation info to BFD target 1384 format. */ 1385 1386 arelent * 1387 tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, 1388 fixS *fixp) 1389 { 1390 arelent *reloc; 1391 bfd_reloc_code_real_type code; 1392 1393 reloc = xmalloc (sizeof (* reloc)); 1394 1395 reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); 1396 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); 1397 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; 1398 1399 /* This is taken account for in md_apply_fix(). */ 1400 reloc->addend = -symbol_get_bfdsym (fixp->fx_addsy)->section->vma; 1401 1402 switch (fixp->fx_r_type) 1403 { 1404 case BFD_RELOC_16: 1405 if (fixp->fx_pcrel) 1406 code = BFD_RELOC_16_PCREL; 1407 else 1408 code = BFD_RELOC_16; 1409 break; 1410 1411 case BFD_RELOC_16_PCREL: 1412 code = BFD_RELOC_16_PCREL; 1413 break; 1414 1415 default: 1416 BAD_CASE (fixp->fx_r_type); 1417 return NULL; 1418 } 1419 1420 reloc->howto = bfd_reloc_type_lookup (stdoutput, code); 1421 1422 if (reloc->howto == NULL) 1423 { 1424 as_bad_where (fixp->fx_file, fixp->fx_line, 1425 _("Can not represent %s relocation in this object file format"), 1426 bfd_get_reloc_code_name (code)); 1427 return NULL; 1428 } 1429 1430 return reloc; 1431 } 1432 1433 void 1434 pseudo_bss (int c ATTRIBUTE_UNUSED) 1435 { 1436 int temp; 1437 1438 temp = get_absolute_expression (); 1439 subseg_set (bss_section, temp); 1440 demand_empty_rest_of_line (); 1441 } 1442 1443 void 1444 pseudo_even (int c ATTRIBUTE_UNUSED) 1445 { 1446 int alignment = 1; /* 2^1 */ 1447 frag_align (alignment, 0, 1); 1448 record_alignment (now_seg, alignment); 1449 } 1450 1451 char * 1452 md_atof (int type, char * litP, int * sizeP) 1453 { 1454 return vax_md_atof (type, litP, sizeP); 1455 } 1456
