1 /* tc-i386.c -- Assemble Intel syntax code for ix86/x86-64 2 Copyright 2009, 2010 3 Free Software Foundation, Inc. 4 5 This file is part of GAS, the GNU Assembler. 6 7 GAS is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GAS is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GAS; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 static struct 23 { 24 operatorT op_modifier; /* Operand modifier. */ 25 int is_mem; /* 1 if operand is memory reference. */ 26 int is_indirect; /* 1 if operand is indirect reference. */ 27 int has_offset; /* 1 if operand has offset. */ 28 unsigned int in_offset; /* >=1 if processing operand of offset. */ 29 unsigned int in_bracket; /* >=1 if processing operand in brackets. */ 30 unsigned int in_scale; /* >=1 if processing multipication operand 31 * in brackets. */ 32 i386_operand_type reloc_types; /* Value obtained from lex_got(). */ 33 const reg_entry *base; /* Base register (if any). */ 34 const reg_entry *index; /* Index register (if any). */ 35 offsetT scale_factor; /* Accumulated scale factor. */ 36 symbolS *seg; 37 } 38 intel_state; 39 40 /* offset X_add_symbol */ 41 #define O_offset O_md32 42 /* offset X_add_symbol */ 43 #define O_short O_md31 44 /* near ptr X_add_symbol */ 45 #define O_near_ptr O_md30 46 /* far ptr X_add_symbol */ 47 #define O_far_ptr O_md29 48 /* byte ptr X_add_symbol */ 49 #define O_byte_ptr O_md28 50 /* word ptr X_add_symbol */ 51 #define O_word_ptr O_md27 52 /* dword ptr X_add_symbol */ 53 #define O_dword_ptr O_md26 54 /* qword ptr X_add_symbol */ 55 #define O_qword_ptr O_md25 56 /* oword ptr X_add_symbol */ 57 #define O_oword_ptr O_md24 58 /* fword ptr X_add_symbol */ 59 #define O_fword_ptr O_md23 60 /* tbyte ptr X_add_symbol */ 61 #define O_tbyte_ptr O_md22 62 /* xmmword ptr X_add_symbol */ 63 #define O_xmmword_ptr O_md21 64 /* ymmword ptr X_add_symbol */ 65 #define O_ymmword_ptr O_md20 66 67 static struct 68 { 69 const char *name; 70 operatorT op; 71 unsigned int operands; 72 } 73 const i386_operators[] = 74 { 75 { "and", O_bit_and, 2 }, 76 { "eq", O_eq, 2 }, 77 { "ge", O_ge, 2 }, 78 { "gt", O_gt, 2 }, 79 { "le", O_le, 2 }, 80 { "lt", O_lt, 2 }, 81 { "mod", O_modulus, 2 }, 82 { "ne", O_ne, 2 }, 83 { "not", O_bit_not, 1 }, 84 { "offset", O_offset, 1 }, 85 { "or", O_bit_inclusive_or, 2 }, 86 { "shl", O_left_shift, 2 }, 87 { "short", O_short, 1 }, 88 { "shr", O_right_shift, 2 }, 89 { "xor", O_bit_exclusive_or, 2 }, 90 { NULL, O_illegal, 0 } 91 }; 92 93 static struct 94 { 95 const char *name; 96 operatorT op; 97 unsigned short sz[3]; 98 } 99 const i386_types[] = 100 { 101 #define I386_TYPE(t, n) { #t, O_##t##_ptr, { n, n, n } } 102 I386_TYPE(byte, 1), 103 I386_TYPE(word, 2), 104 I386_TYPE(dword, 4), 105 I386_TYPE(fword, 6), 106 I386_TYPE(qword, 8), 107 I386_TYPE(tbyte, 10), 108 I386_TYPE(oword, 16), 109 I386_TYPE(xmmword, 16), 110 I386_TYPE(ymmword, 32), 111 #undef I386_TYPE 112 { "near", O_near_ptr, { 0xff04, 0xff02, 0xff08 } }, 113 { "far", O_far_ptr, { 0xff06, 0xff05, 0xff06 } }, 114 { NULL, O_illegal, { 0, 0, 0 } } 115 }; 116 117 operatorT i386_operator (const char *name, unsigned int operands, char *pc) 118 { 119 unsigned int j; 120 121 if (!intel_syntax) 122 return O_absent; 123 124 if (!name) 125 { 126 if (operands != 2) 127 return O_illegal; 128 switch (*input_line_pointer) 129 { 130 case ':': 131 ++input_line_pointer; 132 return O_full_ptr; 133 case '[': 134 ++input_line_pointer; 135 return O_index; 136 case '@': 137 if (this_operand >= 0 && i.reloc[this_operand] == NO_RELOC) 138 { 139 int adjust = 0; 140 char *gotfree_input_line = lex_got (&i.reloc[this_operand], 141 &adjust, 142 &intel_state.reloc_types); 143 144 if (!gotfree_input_line) 145 break; 146 free (gotfree_input_line); 147 *input_line_pointer++ = '+'; 148 memset (input_line_pointer, '0', adjust - 1); 149 input_line_pointer[adjust - 1] = ' '; 150 return O_add; 151 } 152 break; 153 } 154 return O_illegal; 155 } 156 157 for (j = 0; i386_operators[j].name; ++j) 158 if (strcasecmp (i386_operators[j].name, name) == 0) 159 { 160 if (i386_operators[j].operands 161 && i386_operators[j].operands != operands) 162 return O_illegal; 163 return i386_operators[j].op; 164 } 165 166 for (j = 0; i386_types[j].name; ++j) 167 if (strcasecmp (i386_types[j].name, name) == 0) 168 break; 169 if (i386_types[j].name && *pc == ' ') 170 { 171 char *pname = ++input_line_pointer; 172 char c = get_symbol_end (); 173 174 if (strcasecmp (pname, "ptr") == 0) 175 { 176 pname[-1] = *pc; 177 *pc = c; 178 if (intel_syntax > 0 || operands != 1) 179 return O_illegal; 180 return i386_types[j].op; 181 } 182 183 *input_line_pointer = c; 184 input_line_pointer = pname - 1; 185 } 186 187 return O_absent; 188 } 189 190 static int i386_intel_parse_name (const char *name, expressionS *e) 191 { 192 unsigned int j; 193 194 if (! strcmp (name, "$")) 195 { 196 current_location (e); 197 return 1; 198 } 199 200 for (j = 0; i386_types[j].name; ++j) 201 if (strcasecmp(i386_types[j].name, name) == 0) 202 { 203 e->X_op = O_constant; 204 e->X_add_number = i386_types[j].sz[flag_code]; 205 e->X_add_symbol = NULL; 206 e->X_op_symbol = NULL; 207 return 1; 208 } 209 210 return 0; 211 } 212 213 static INLINE int i386_intel_check (const reg_entry *rreg, 214 const reg_entry *base, 215 const reg_entry *iindex) 216 { 217 if ((this_operand >= 0 218 && rreg != i.op[this_operand].regs) 219 || base != intel_state.base 220 || iindex != intel_state.index) 221 { 222 as_bad (_("invalid use of register")); 223 return 0; 224 } 225 return 1; 226 } 227 228 static INLINE void i386_intel_fold (expressionS *e, symbolS *sym) 229 { 230 expressionS *exp = symbol_get_value_expression (sym); 231 if (S_GET_SEGMENT (sym) == absolute_section) 232 { 233 offsetT val = e->X_add_number; 234 235 *e = *exp; 236 e->X_add_number += val; 237 } 238 else 239 { 240 if (exp->X_op == O_symbol 241 && strcmp (S_GET_NAME (exp->X_add_symbol), 242 GLOBAL_OFFSET_TABLE_NAME) == 0) 243 sym = exp->X_add_symbol; 244 e->X_add_symbol = sym; 245 e->X_op_symbol = NULL; 246 e->X_op = O_symbol; 247 } 248 } 249 250 static int 251 i386_intel_simplify_register (expressionS *e) 252 { 253 int reg_num; 254 255 if (this_operand < 0 || intel_state.in_offset) 256 { 257 as_bad (_("invalid use of register")); 258 return 0; 259 } 260 261 if (e->X_op == O_register) 262 reg_num = e->X_add_number; 263 else 264 reg_num = e->X_md - 1; 265 266 if (!intel_state.in_bracket) 267 { 268 if (i.op[this_operand].regs) 269 { 270 as_bad (_("invalid use of register")); 271 return 0; 272 } 273 if (i386_regtab[reg_num].reg_type.bitfield.sreg3 274 && i386_regtab[reg_num].reg_num == RegFlat) 275 { 276 as_bad (_("invalid use of pseudo-register")); 277 return 0; 278 } 279 i.op[this_operand].regs = i386_regtab + reg_num; 280 } 281 else if (!intel_state.index 282 && (i386_regtab[reg_num].reg_type.bitfield.regxmm 283 || i386_regtab[reg_num].reg_type.bitfield.regymm)) 284 intel_state.index = i386_regtab + reg_num; 285 else if (!intel_state.base && !intel_state.in_scale) 286 intel_state.base = i386_regtab + reg_num; 287 else if (!intel_state.index) 288 { 289 if (intel_state.in_scale 290 || i386_regtab[reg_num].reg_type.bitfield.baseindex) 291 intel_state.index = i386_regtab + reg_num; 292 else 293 { 294 /* Convert base to index and make ESP/RSP the base. */ 295 intel_state.index = intel_state.base; 296 intel_state.base = i386_regtab + reg_num; 297 } 298 } 299 else 300 { 301 /* esp is invalid as index */ 302 intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM; 303 } 304 return 2; 305 } 306 307 static int i386_intel_simplify (expressionS *); 308 309 static INLINE int i386_intel_simplify_symbol(symbolS *sym) 310 { 311 int ret = i386_intel_simplify (symbol_get_value_expression (sym)); 312 313 if (ret == 2) 314 { 315 S_SET_SEGMENT(sym, absolute_section); 316 ret = 1; 317 } 318 return ret; 319 } 320 321 static int i386_intel_simplify (expressionS *e) 322 { 323 const reg_entry *the_reg = (this_operand >= 0 324 ? i.op[this_operand].regs : NULL); 325 const reg_entry *base = intel_state.base; 326 const reg_entry *state_index = intel_state.index; 327 int ret; 328 329 if (!intel_syntax) 330 return 1; 331 332 switch (e->X_op) 333 { 334 case O_index: 335 if (e->X_add_symbol) 336 { 337 if (!i386_intel_simplify_symbol (e->X_add_symbol) 338 || !i386_intel_check(the_reg, intel_state.base, 339 intel_state.index)) 340 return 0;; 341 } 342 if (!intel_state.in_offset) 343 ++intel_state.in_bracket; 344 ret = i386_intel_simplify_symbol (e->X_op_symbol); 345 if (!intel_state.in_offset) 346 --intel_state.in_bracket; 347 if (!ret) 348 return 0; 349 if (e->X_add_symbol) 350 e->X_op = O_add; 351 else 352 i386_intel_fold (e, e->X_op_symbol); 353 break; 354 355 case O_offset: 356 intel_state.has_offset = 1; 357 ++intel_state.in_offset; 358 ret = i386_intel_simplify_symbol (e->X_add_symbol); 359 --intel_state.in_offset; 360 if (!ret || !i386_intel_check(the_reg, base, state_index)) 361 return 0; 362 i386_intel_fold (e, e->X_add_symbol); 363 return ret; 364 365 case O_byte_ptr: 366 case O_word_ptr: 367 case O_dword_ptr: 368 case O_fword_ptr: 369 case O_qword_ptr: 370 case O_tbyte_ptr: 371 case O_oword_ptr: 372 case O_xmmword_ptr: 373 case O_ymmword_ptr: 374 case O_near_ptr: 375 case O_far_ptr: 376 if (intel_state.op_modifier == O_absent) 377 intel_state.op_modifier = e->X_op; 378 /* FALLTHROUGH */ 379 case O_short: 380 if (symbol_get_value_expression (e->X_add_symbol)->X_op 381 == O_register) 382 { 383 as_bad (_("invalid use of register")); 384 return 0; 385 } 386 if (!i386_intel_simplify_symbol (e->X_add_symbol)) 387 return 0; 388 i386_intel_fold (e, e->X_add_symbol); 389 break; 390 391 case O_full_ptr: 392 if (symbol_get_value_expression (e->X_op_symbol)->X_op 393 == O_register) 394 { 395 as_bad (_("invalid use of register")); 396 return 0; 397 } 398 if (!i386_intel_simplify_symbol (e->X_op_symbol) 399 || !i386_intel_check(the_reg, intel_state.base, 400 intel_state.index)) 401 return 0; 402 if (!intel_state.in_offset) 403 intel_state.seg = e->X_add_symbol; 404 i386_intel_fold (e, e->X_op_symbol); 405 break; 406 407 case O_multiply: 408 if (this_operand >= 0 && intel_state.in_bracket) 409 { 410 expressionS *scale = NULL; 411 412 if (intel_state.index) 413 --scale; 414 415 if (!intel_state.in_scale++) 416 intel_state.scale_factor = 1; 417 418 ret = i386_intel_simplify_symbol (e->X_add_symbol); 419 if (ret && !scale && intel_state.index) 420 scale = symbol_get_value_expression (e->X_op_symbol); 421 422 if (ret) 423 ret = i386_intel_simplify_symbol (e->X_op_symbol); 424 if (ret && !scale && intel_state.index) 425 scale = symbol_get_value_expression (e->X_add_symbol); 426 427 if (ret && scale && (scale + 1)) 428 { 429 resolve_expression (scale); 430 if (scale->X_op != O_constant 431 || intel_state.index->reg_type.bitfield.reg16) 432 scale->X_add_number = 0; 433 intel_state.scale_factor *= scale->X_add_number; 434 } 435 436 --intel_state.in_scale; 437 if (!ret) 438 return 0; 439 440 if (!intel_state.in_scale) 441 switch (intel_state.scale_factor) 442 { 443 case 1: 444 i.log2_scale_factor = 0; 445 break; 446 case 2: 447 i.log2_scale_factor = 1; 448 break; 449 case 4: 450 i.log2_scale_factor = 2; 451 break; 452 case 8: 453 i.log2_scale_factor = 3; 454 break; 455 default: 456 /* esp is invalid as index */ 457 intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM; 458 break; 459 } 460 461 break; 462 } 463 goto fallthrough; 464 465 case O_register: 466 ret = i386_intel_simplify_register (e); 467 if (ret == 2) 468 { 469 gas_assert (e->X_add_number < (unsigned short) -1); 470 e->X_md = (unsigned short) e->X_add_number + 1; 471 e->X_op = O_constant; 472 e->X_add_number = 0; 473 } 474 return ret; 475 476 case O_constant: 477 if (e->X_md) 478 return i386_intel_simplify_register (e); 479 480 /* FALLTHROUGH */ 481 default: 482 fallthrough: 483 if (e->X_add_symbol 484 && !i386_intel_simplify_symbol (e->X_add_symbol)) 485 return 0; 486 if (e->X_op == O_add || e->X_op == O_subtract) 487 { 488 base = intel_state.base; 489 state_index = intel_state.index; 490 } 491 if (!i386_intel_check (the_reg, base, state_index) 492 || (e->X_op_symbol 493 && !i386_intel_simplify_symbol (e->X_op_symbol)) 494 || !i386_intel_check (the_reg, 495 (e->X_op != O_add 496 ? base : intel_state.base), 497 (e->X_op != O_add 498 ? state_index : intel_state.index))) 499 return 0; 500 break; 501 } 502 503 if (this_operand >= 0 504 && e->X_op == O_symbol 505 && !intel_state.in_offset) 506 { 507 segT seg = S_GET_SEGMENT (e->X_add_symbol); 508 509 if (seg != absolute_section 510 && seg != reg_section 511 && seg != expr_section) 512 intel_state.is_mem |= 2 - !intel_state.in_bracket; 513 } 514 515 return 1; 516 } 517 518 int i386_need_index_operator (void) 519 { 520 return intel_syntax < 0; 521 } 522 523 static int 524 i386_intel_operand (char *operand_string, int got_a_float) 525 { 526 char *saved_input_line_pointer, *buf; 527 segT exp_seg; 528 expressionS exp, *expP; 529 char suffix = 0; 530 int ret; 531 532 /* Initialize state structure. */ 533 intel_state.op_modifier = O_absent; 534 intel_state.is_mem = 0; 535 intel_state.is_indirect = 0; 536 intel_state.has_offset = 0; 537 intel_state.base = NULL; 538 intel_state.index = NULL; 539 intel_state.seg = NULL; 540 operand_type_set (&intel_state.reloc_types, ~0); 541 gas_assert (!intel_state.in_offset); 542 gas_assert (!intel_state.in_bracket); 543 gas_assert (!intel_state.in_scale); 544 545 saved_input_line_pointer = input_line_pointer; 546 input_line_pointer = buf = xstrdup (operand_string); 547 548 intel_syntax = -1; 549 memset (&exp, 0, sizeof(exp)); 550 exp_seg = expression (&exp); 551 ret = i386_intel_simplify (&exp); 552 intel_syntax = 1; 553 554 SKIP_WHITESPACE (); 555 if (!is_end_of_line[(unsigned char) *input_line_pointer]) 556 { 557 as_bad (_("junk `%s' after expression"), input_line_pointer); 558 ret = 0; 559 } 560 else if (exp.X_op == O_illegal || exp.X_op == O_absent) 561 { 562 as_bad (_("invalid expression")); 563 ret = 0; 564 } 565 else if (!intel_state.has_offset 566 && input_line_pointer > buf 567 && *(input_line_pointer - 1) == ']') 568 { 569 intel_state.is_mem |= 1; 570 intel_state.is_indirect = 1; 571 } 572 573 input_line_pointer = saved_input_line_pointer; 574 free (buf); 575 576 gas_assert (!intel_state.in_offset); 577 gas_assert (!intel_state.in_bracket); 578 gas_assert (!intel_state.in_scale); 579 580 if (!ret) 581 return 0; 582 583 if (intel_state.op_modifier != O_absent 584 && current_templates->start->base_opcode != 0x8d /* lea */) 585 { 586 i.types[this_operand].bitfield.unspecified = 0; 587 588 switch (intel_state.op_modifier) 589 { 590 case O_byte_ptr: 591 i.types[this_operand].bitfield.byte = 1; 592 suffix = BYTE_MNEM_SUFFIX; 593 break; 594 595 case O_word_ptr: 596 i.types[this_operand].bitfield.word = 1; 597 if ((current_templates->start->name[0] == 'l' 598 && current_templates->start->name[2] == 's' 599 && current_templates->start->name[3] == 0) 600 || current_templates->start->base_opcode == 0x62 /* bound */) 601 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ 602 else if (got_a_float == 2) /* "fi..." */ 603 suffix = SHORT_MNEM_SUFFIX; 604 else 605 suffix = WORD_MNEM_SUFFIX; 606 break; 607 608 case O_dword_ptr: 609 i.types[this_operand].bitfield.dword = 1; 610 if ((current_templates->start->name[0] == 'l' 611 && current_templates->start->name[2] == 's' 612 && current_templates->start->name[3] == 0) 613 || current_templates->start->base_opcode == 0x62 /* bound */) 614 suffix = WORD_MNEM_SUFFIX; 615 else if (flag_code == CODE_16BIT 616 && (current_templates->start->opcode_modifier.jump 617 || current_templates->start->opcode_modifier.jumpdword)) 618 suffix = LONG_DOUBLE_MNEM_SUFFIX; 619 else if (got_a_float == 1) /* "f..." */ 620 suffix = SHORT_MNEM_SUFFIX; 621 else 622 suffix = LONG_MNEM_SUFFIX; 623 break; 624 625 case O_fword_ptr: 626 i.types[this_operand].bitfield.fword = 1; 627 if (current_templates->start->name[0] == 'l' 628 && current_templates->start->name[2] == 's' 629 && current_templates->start->name[3] == 0) 630 suffix = LONG_MNEM_SUFFIX; 631 else if (!got_a_float) 632 { 633 if (flag_code == CODE_16BIT) 634 add_prefix (DATA_PREFIX_OPCODE); 635 suffix = LONG_DOUBLE_MNEM_SUFFIX; 636 } 637 else 638 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ 639 break; 640 641 case O_qword_ptr: 642 i.types[this_operand].bitfield.qword = 1; 643 if (current_templates->start->base_opcode == 0x62 /* bound */ 644 || got_a_float == 1) /* "f..." */ 645 suffix = LONG_MNEM_SUFFIX; 646 else 647 suffix = QWORD_MNEM_SUFFIX; 648 break; 649 650 case O_tbyte_ptr: 651 i.types[this_operand].bitfield.tbyte = 1; 652 if (got_a_float == 1) 653 suffix = LONG_DOUBLE_MNEM_SUFFIX; 654 else 655 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ 656 break; 657 658 case O_oword_ptr: 659 case O_xmmword_ptr: 660 i.types[this_operand].bitfield.xmmword = 1; 661 suffix = XMMWORD_MNEM_SUFFIX; 662 break; 663 664 case O_ymmword_ptr: 665 i.types[this_operand].bitfield.ymmword = 1; 666 suffix = YMMWORD_MNEM_SUFFIX; 667 break; 668 669 case O_far_ptr: 670 suffix = LONG_DOUBLE_MNEM_SUFFIX; 671 /* FALLTHROUGH */ 672 case O_near_ptr: 673 if (!current_templates->start->opcode_modifier.jump 674 && !current_templates->start->opcode_modifier.jumpdword) 675 suffix = got_a_float /* so it will cause an error */ 676 ? BYTE_MNEM_SUFFIX 677 : LONG_DOUBLE_MNEM_SUFFIX; 678 break; 679 680 default: 681 BAD_CASE (intel_state.op_modifier); 682 break; 683 } 684 685 if (!i.suffix) 686 i.suffix = suffix; 687 else if (i.suffix != suffix) 688 { 689 as_bad (_("conflicting operand size modifiers")); 690 return 0; 691 } 692 } 693 694 /* Operands for jump/call need special consideration. */ 695 if (current_templates->start->opcode_modifier.jump 696 || current_templates->start->opcode_modifier.jumpdword 697 || current_templates->start->opcode_modifier.jumpintersegment) 698 { 699 if (i.op[this_operand].regs 700 || intel_state.base 701 || intel_state.index 702 || intel_state.is_mem > 1) 703 i.types[this_operand].bitfield.jumpabsolute = 1; 704 else 705 switch (intel_state.op_modifier) 706 { 707 case O_near_ptr: 708 if (intel_state.seg) 709 i.types[this_operand].bitfield.jumpabsolute = 1; 710 else 711 intel_state.is_mem = 1; 712 break; 713 case O_far_ptr: 714 case O_absent: 715 if (!intel_state.seg) 716 { 717 intel_state.is_mem = 1; 718 if (intel_state.op_modifier == O_absent) 719 { 720 if (intel_state.is_indirect == 1) 721 i.types[this_operand].bitfield.jumpabsolute = 1; 722 break; 723 } 724 as_bad (_("cannot infer the segment part of the operand")); 725 return 0; 726 } 727 else if (S_GET_SEGMENT (intel_state.seg) == reg_section) 728 i.types[this_operand].bitfield.jumpabsolute = 1; 729 else 730 { 731 i386_operand_type types; 732 733 if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS) 734 { 735 as_bad (_("at most %d immediate operands are allowed"), 736 MAX_IMMEDIATE_OPERANDS); 737 return 0; 738 } 739 expP = &im_expressions[i.imm_operands++]; 740 memset (expP, 0, sizeof(*expP)); 741 expP->X_op = O_symbol; 742 expP->X_add_symbol = intel_state.seg; 743 i.op[this_operand].imms = expP; 744 745 resolve_expression (expP); 746 operand_type_set (&types, ~0); 747 if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state.seg), 748 expP, types, operand_string)) 749 return 0; 750 if (i.operands < MAX_OPERANDS) 751 { 752 this_operand = i.operands++; 753 i.types[this_operand].bitfield.unspecified = 1; 754 } 755 if (suffix == LONG_DOUBLE_MNEM_SUFFIX) 756 i.suffix = 0; 757 intel_state.seg = NULL; 758 intel_state.is_mem = 0; 759 } 760 break; 761 default: 762 i.types[this_operand].bitfield.jumpabsolute = 1; 763 break; 764 } 765 if (i.types[this_operand].bitfield.jumpabsolute) 766 intel_state.is_mem |= 1; 767 } 768 else if (intel_state.seg) 769 intel_state.is_mem |= 1; 770 771 if (i.op[this_operand].regs) 772 { 773 i386_operand_type temp; 774 775 /* Register operand. */ 776 if (intel_state.base || intel_state.index || intel_state.seg) 777 { 778 as_bad (_("invalid operand")); 779 return 0; 780 } 781 782 temp = i.op[this_operand].regs->reg_type; 783 temp.bitfield.baseindex = 0; 784 i.types[this_operand] = operand_type_or (i.types[this_operand], 785 temp); 786 i.types[this_operand].bitfield.unspecified = 0; 787 ++i.reg_operands; 788 } 789 else if (intel_state.base 790 || intel_state.index 791 || intel_state.seg 792 || intel_state.is_mem) 793 { 794 /* Memory operand. */ 795 if (i.mem_operands 796 >= 2 - !current_templates->start->opcode_modifier.isstring) 797 { 798 /* Handle 799 800 call 0x9090,0x90909090 801 lcall 0x9090,0x90909090 802 jmp 0x9090,0x90909090 803 ljmp 0x9090,0x90909090 804 */ 805 806 if ((current_templates->start->opcode_modifier.jumpintersegment 807 || current_templates->start->opcode_modifier.jumpdword 808 || current_templates->start->opcode_modifier.jump) 809 && this_operand == 1 810 && intel_state.seg == NULL 811 && i.mem_operands == 1 812 && i.disp_operands == 1 813 && intel_state.op_modifier == O_absent) 814 { 815 /* Try to process the first operand as immediate, */ 816 this_operand = 0; 817 if (i386_finalize_immediate (exp_seg, i.op[0].imms, 818 intel_state.reloc_types, 819 NULL)) 820 { 821 this_operand = 1; 822 expP = &im_expressions[0]; 823 i.op[this_operand].imms = expP; 824 *expP = exp; 825 826 /* Try to process the second operand as immediate, */ 827 if (i386_finalize_immediate (exp_seg, expP, 828 intel_state.reloc_types, 829 NULL)) 830 { 831 i.mem_operands = 0; 832 i.disp_operands = 0; 833 i.imm_operands = 2; 834 i.types[0].bitfield.mem = 0; 835 i.types[0].bitfield.disp16 = 0; 836 i.types[0].bitfield.disp32 = 0; 837 i.types[0].bitfield.disp32s = 0; 838 return 1; 839 } 840 } 841 } 842 843 as_bad (_("too many memory references for `%s'"), 844 current_templates->start->name); 845 return 0; 846 } 847 848 expP = &disp_expressions[i.disp_operands]; 849 memcpy (expP, &exp, sizeof(exp)); 850 resolve_expression (expP); 851 852 if (expP->X_op != O_constant 853 || expP->X_add_number 854 || (!intel_state.base 855 && !intel_state.index)) 856 { 857 i.op[this_operand].disps = expP; 858 i.disp_operands++; 859 860 if (flag_code == CODE_64BIT) 861 { 862 i.types[this_operand].bitfield.disp32 = 1; 863 if (!i.prefix[ADDR_PREFIX]) 864 { 865 i.types[this_operand].bitfield.disp64 = 1; 866 i.types[this_operand].bitfield.disp32s = 1; 867 } 868 } 869 else if (!i.prefix[ADDR_PREFIX] ^ (flag_code == CODE_16BIT)) 870 i.types[this_operand].bitfield.disp32 = 1; 871 else 872 i.types[this_operand].bitfield.disp16 = 1; 873 874 #if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT) 875 /* 876 * exp_seg is used only for verification in 877 * i386_finalize_displacement, and we can end up seeing reg_section 878 * here - but we know we removed all registers from the expression 879 * (or error-ed on any remaining ones) in i386_intel_simplify. I 880 * consider the check in i386_finalize_displacement bogus anyway, in 881 * particular because it doesn't allow for expr_section, so I'd 882 * rather see that check (and the similar one in 883 * i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out 884 * expert I can't really say whether that would have other bad side 885 * effects. 886 */ 887 if (OUTPUT_FLAVOR == bfd_target_aout_flavour 888 && exp_seg == reg_section) 889 exp_seg = expP->X_op != O_constant ? undefined_section 890 : absolute_section; 891 #endif 892 893 if (!i386_finalize_displacement (exp_seg, expP, 894 intel_state.reloc_types, 895 operand_string)) 896 return 0; 897 } 898 899 if (intel_state.base || intel_state.index) 900 i.types[this_operand].bitfield.baseindex = 1; 901 902 if (intel_state.seg) 903 { 904 for (;;) 905 { 906 expP = symbol_get_value_expression (intel_state.seg); 907 if (expP->X_op != O_full_ptr) 908 break; 909 intel_state.seg = expP->X_add_symbol; 910 } 911 if (expP->X_op != O_register) 912 { 913 as_bad (_("segment register name expected")); 914 return 0; 915 } 916 if (!i386_regtab[expP->X_add_number].reg_type.bitfield.sreg2 917 && !i386_regtab[expP->X_add_number].reg_type.bitfield.sreg3) 918 { 919 as_bad (_("invalid use of register")); 920 return 0; 921 } 922 switch (i386_regtab[expP->X_add_number].reg_num) 923 { 924 case 0: i.seg[i.mem_operands] = &es; break; 925 case 1: i.seg[i.mem_operands] = &cs; break; 926 case 2: i.seg[i.mem_operands] = &ss; break; 927 case 3: i.seg[i.mem_operands] = &ds; break; 928 case 4: i.seg[i.mem_operands] = &fs; break; 929 case 5: i.seg[i.mem_operands] = &gs; break; 930 case RegFlat: i.seg[i.mem_operands] = NULL; break; 931 } 932 } 933 934 /* Swap base and index in 16-bit memory operands like 935 [si+bx]. Since i386_index_check is also used in AT&T 936 mode we have to do that here. */ 937 if (intel_state.base 938 && intel_state.index 939 && intel_state.base->reg_type.bitfield.reg16 940 && intel_state.index->reg_type.bitfield.reg16 941 && intel_state.base->reg_num >= 6 942 && intel_state.index->reg_num < 6) 943 { 944 i.base_reg = intel_state.index; 945 i.index_reg = intel_state.base; 946 } 947 else 948 { 949 i.base_reg = intel_state.base; 950 i.index_reg = intel_state.index; 951 } 952 953 if (!i386_index_check (operand_string)) 954 return 0; 955 956 i.types[this_operand].bitfield.mem = 1; 957 ++i.mem_operands; 958 } 959 else 960 { 961 /* Immediate. */ 962 if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS) 963 { 964 as_bad (_("at most %d immediate operands are allowed"), 965 MAX_IMMEDIATE_OPERANDS); 966 return 0; 967 } 968 969 expP = &im_expressions[i.imm_operands++]; 970 i.op[this_operand].imms = expP; 971 *expP = exp; 972 973 return i386_finalize_immediate (exp_seg, expP, intel_state.reloc_types, 974 operand_string); 975 } 976 977 return 1; 978 } 979