| 1 | /* tc-i386.c -- Assemble Intel syntax code for ix86/x86-64 |
| 2 | Copyright (C) 2009-2016 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 the Free |
| 18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 19 | 02110-1301, USA. */ |
| 20 | |
| 21 | static struct |
| 22 | { |
| 23 | operatorT op_modifier; /* Operand modifier. */ |
| 24 | int is_mem; /* 1 if operand is memory reference. */ |
| 25 | int is_indirect; /* 1 if operand is indirect reference. */ |
| 26 | int has_offset; /* 1 if operand has offset. */ |
| 27 | unsigned int in_offset; /* >=1 if processing operand of offset. */ |
| 28 | unsigned int in_bracket; /* >=1 if processing operand in brackets. */ |
| 29 | unsigned int in_scale; /* >=1 if processing multipication operand |
| 30 | * in brackets. */ |
| 31 | i386_operand_type reloc_types; /* Value obtained from lex_got(). */ |
| 32 | const reg_entry *base; /* Base register (if any). */ |
| 33 | const reg_entry *index; /* Index register (if any). */ |
| 34 | offsetT scale_factor; /* Accumulated scale factor. */ |
| 35 | symbolS *seg; |
| 36 | } |
| 37 | intel_state; |
| 38 | |
| 39 | /* offset X_add_symbol */ |
| 40 | #define O_offset O_md32 |
| 41 | /* offset X_add_symbol */ |
| 42 | #define O_short O_md31 |
| 43 | /* near ptr X_add_symbol */ |
| 44 | #define O_near_ptr O_md30 |
| 45 | /* far ptr X_add_symbol */ |
| 46 | #define O_far_ptr O_md29 |
| 47 | /* byte ptr X_add_symbol */ |
| 48 | #define O_byte_ptr O_md28 |
| 49 | /* word ptr X_add_symbol */ |
| 50 | #define O_word_ptr O_md27 |
| 51 | /* dword ptr X_add_symbol */ |
| 52 | #define O_dword_ptr O_md26 |
| 53 | /* qword ptr X_add_symbol */ |
| 54 | #define O_qword_ptr O_md25 |
| 55 | /* oword ptr X_add_symbol */ |
| 56 | #define O_oword_ptr O_md24 |
| 57 | /* fword ptr X_add_symbol */ |
| 58 | #define O_fword_ptr O_md23 |
| 59 | /* tbyte ptr X_add_symbol */ |
| 60 | #define O_tbyte_ptr O_md22 |
| 61 | /* xmmword ptr X_add_symbol */ |
| 62 | #define O_xmmword_ptr O_md21 |
| 63 | /* ymmword ptr X_add_symbol */ |
| 64 | #define O_ymmword_ptr O_md20 |
| 65 | /* zmmword ptr X_add_symbol */ |
| 66 | #define O_zmmword_ptr O_md19 |
| 67 | |
| 68 | static struct |
| 69 | { |
| 70 | const char *name; |
| 71 | operatorT op; |
| 72 | unsigned int operands; |
| 73 | } |
| 74 | const i386_operators[] = |
| 75 | { |
| 76 | { "and", O_bit_and, 2 }, |
| 77 | { "eq", O_eq, 2 }, |
| 78 | { "ge", O_ge, 2 }, |
| 79 | { "gt", O_gt, 2 }, |
| 80 | { "le", O_le, 2 }, |
| 81 | { "lt", O_lt, 2 }, |
| 82 | { "mod", O_modulus, 2 }, |
| 83 | { "ne", O_ne, 2 }, |
| 84 | { "not", O_bit_not, 1 }, |
| 85 | { "offset", O_offset, 1 }, |
| 86 | { "or", O_bit_inclusive_or, 2 }, |
| 87 | { "shl", O_left_shift, 2 }, |
| 88 | { "short", O_short, 1 }, |
| 89 | { "shr", O_right_shift, 2 }, |
| 90 | { "xor", O_bit_exclusive_or, 2 }, |
| 91 | { NULL, O_illegal, 0 } |
| 92 | }; |
| 93 | |
| 94 | static struct |
| 95 | { |
| 96 | const char *name; |
| 97 | operatorT op; |
| 98 | unsigned short sz[3]; |
| 99 | } |
| 100 | const i386_types[] = |
| 101 | { |
| 102 | #define I386_TYPE(t, n) { #t, O_##t##_ptr, { n, n, n } } |
| 103 | I386_TYPE(byte, 1), |
| 104 | I386_TYPE(word, 2), |
| 105 | I386_TYPE(dword, 4), |
| 106 | I386_TYPE(fword, 6), |
| 107 | I386_TYPE(qword, 8), |
| 108 | I386_TYPE(tbyte, 10), |
| 109 | I386_TYPE(oword, 16), |
| 110 | I386_TYPE(xmmword, 16), |
| 111 | I386_TYPE(ymmword, 32), |
| 112 | I386_TYPE(zmmword, 64), |
| 113 | #undef I386_TYPE |
| 114 | { "near", O_near_ptr, { 0xff04, 0xff02, 0xff08 } }, |
| 115 | { "far", O_far_ptr, { 0xff06, 0xff05, 0xff06 } }, |
| 116 | { NULL, O_illegal, { 0, 0, 0 } } |
| 117 | }; |
| 118 | |
| 119 | operatorT i386_operator (const char *name, unsigned int operands, char *pc) |
| 120 | { |
| 121 | unsigned int j; |
| 122 | |
| 123 | if (!intel_syntax) |
| 124 | return O_absent; |
| 125 | |
| 126 | if (!name) |
| 127 | { |
| 128 | if (operands != 2) |
| 129 | return O_illegal; |
| 130 | switch (*input_line_pointer) |
| 131 | { |
| 132 | case ':': |
| 133 | ++input_line_pointer; |
| 134 | return O_full_ptr; |
| 135 | case '[': |
| 136 | ++input_line_pointer; |
| 137 | return O_index; |
| 138 | case '@': |
| 139 | if (this_operand >= 0 && i.reloc[this_operand] == NO_RELOC) |
| 140 | { |
| 141 | int adjust = 0; |
| 142 | char *gotfree_input_line = lex_got (&i.reloc[this_operand], |
| 143 | &adjust, |
| 144 | &intel_state.reloc_types); |
| 145 | |
| 146 | if (!gotfree_input_line) |
| 147 | break; |
| 148 | free (gotfree_input_line); |
| 149 | *input_line_pointer++ = '+'; |
| 150 | memset (input_line_pointer, '0', adjust - 1); |
| 151 | input_line_pointer[adjust - 1] = ' '; |
| 152 | return O_add; |
| 153 | } |
| 154 | break; |
| 155 | } |
| 156 | return O_illegal; |
| 157 | } |
| 158 | |
| 159 | for (j = 0; i386_operators[j].name; ++j) |
| 160 | if (strcasecmp (i386_operators[j].name, name) == 0) |
| 161 | { |
| 162 | if (i386_operators[j].operands |
| 163 | && i386_operators[j].operands != operands) |
| 164 | return O_illegal; |
| 165 | return i386_operators[j].op; |
| 166 | } |
| 167 | |
| 168 | for (j = 0; i386_types[j].name; ++j) |
| 169 | if (strcasecmp (i386_types[j].name, name) == 0) |
| 170 | break; |
| 171 | |
| 172 | if (i386_types[j].name && *pc == ' ') |
| 173 | { |
| 174 | char *pname; |
| 175 | char c; |
| 176 | |
| 177 | ++input_line_pointer; |
| 178 | c = get_symbol_name (&pname); |
| 179 | |
| 180 | if (strcasecmp (pname, "ptr") == 0) |
| 181 | { |
| 182 | /* FIXME: What if c == '"' ? */ |
| 183 | pname[-1] = *pc; |
| 184 | *pc = c; |
| 185 | if (intel_syntax > 0 || operands != 1) |
| 186 | return O_illegal; |
| 187 | return i386_types[j].op; |
| 188 | } |
| 189 | |
| 190 | (void) restore_line_pointer (c); |
| 191 | input_line_pointer = pname - 1; |
| 192 | } |
| 193 | |
| 194 | return O_absent; |
| 195 | } |
| 196 | |
| 197 | static int i386_intel_parse_name (const char *name, expressionS *e) |
| 198 | { |
| 199 | unsigned int j; |
| 200 | |
| 201 | if (! strcmp (name, "$")) |
| 202 | { |
| 203 | current_location (e); |
| 204 | return 1; |
| 205 | } |
| 206 | |
| 207 | for (j = 0; i386_types[j].name; ++j) |
| 208 | if (strcasecmp(i386_types[j].name, name) == 0) |
| 209 | { |
| 210 | e->X_op = O_constant; |
| 211 | e->X_add_number = i386_types[j].sz[flag_code]; |
| 212 | e->X_add_symbol = NULL; |
| 213 | e->X_op_symbol = NULL; |
| 214 | return 1; |
| 215 | } |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | static INLINE int i386_intel_check (const reg_entry *rreg, |
| 221 | const reg_entry *base, |
| 222 | const reg_entry *iindex) |
| 223 | { |
| 224 | if ((this_operand >= 0 |
| 225 | && rreg != i.op[this_operand].regs) |
| 226 | || base != intel_state.base |
| 227 | || iindex != intel_state.index) |
| 228 | { |
| 229 | as_bad (_("invalid use of register")); |
| 230 | return 0; |
| 231 | } |
| 232 | return 1; |
| 233 | } |
| 234 | |
| 235 | static INLINE void i386_intel_fold (expressionS *e, symbolS *sym) |
| 236 | { |
| 237 | expressionS *exp = symbol_get_value_expression (sym); |
| 238 | if (S_GET_SEGMENT (sym) == absolute_section) |
| 239 | { |
| 240 | offsetT val = e->X_add_number; |
| 241 | |
| 242 | *e = *exp; |
| 243 | e->X_add_number += val; |
| 244 | } |
| 245 | else |
| 246 | { |
| 247 | if (exp->X_op == O_symbol |
| 248 | && strcmp (S_GET_NAME (exp->X_add_symbol), |
| 249 | GLOBAL_OFFSET_TABLE_NAME) == 0) |
| 250 | sym = exp->X_add_symbol; |
| 251 | e->X_add_symbol = sym; |
| 252 | e->X_op_symbol = NULL; |
| 253 | e->X_op = O_symbol; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | static int |
| 258 | i386_intel_simplify_register (expressionS *e) |
| 259 | { |
| 260 | int reg_num; |
| 261 | |
| 262 | if (this_operand < 0 || intel_state.in_offset) |
| 263 | { |
| 264 | as_bad (_("invalid use of register")); |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | if (e->X_op == O_register) |
| 269 | reg_num = e->X_add_number; |
| 270 | else |
| 271 | reg_num = e->X_md - 1; |
| 272 | |
| 273 | if (!intel_state.in_bracket) |
| 274 | { |
| 275 | if (i.op[this_operand].regs) |
| 276 | { |
| 277 | as_bad (_("invalid use of register")); |
| 278 | return 0; |
| 279 | } |
| 280 | if (i386_regtab[reg_num].reg_type.bitfield.sreg3 |
| 281 | && i386_regtab[reg_num].reg_num == RegFlat) |
| 282 | { |
| 283 | as_bad (_("invalid use of pseudo-register")); |
| 284 | return 0; |
| 285 | } |
| 286 | i.op[this_operand].regs = i386_regtab + reg_num; |
| 287 | } |
| 288 | else if (!intel_state.index |
| 289 | && (i386_regtab[reg_num].reg_type.bitfield.regxmm |
| 290 | || i386_regtab[reg_num].reg_type.bitfield.regymm |
| 291 | || i386_regtab[reg_num].reg_type.bitfield.regzmm)) |
| 292 | intel_state.index = i386_regtab + reg_num; |
| 293 | else if (!intel_state.base && !intel_state.in_scale) |
| 294 | intel_state.base = i386_regtab + reg_num; |
| 295 | else if (!intel_state.index) |
| 296 | { |
| 297 | if (intel_state.in_scale |
| 298 | || current_templates->start->base_opcode == 0xf30f1b /* bndmk */ |
| 299 | || (current_templates->start->base_opcode & ~1) == 0x0f1a /* bnd{ld,st}x */ |
| 300 | || i386_regtab[reg_num].reg_type.bitfield.baseindex) |
| 301 | intel_state.index = i386_regtab + reg_num; |
| 302 | else |
| 303 | { |
| 304 | /* Convert base to index and make ESP/RSP the base. */ |
| 305 | intel_state.index = intel_state.base; |
| 306 | intel_state.base = i386_regtab + reg_num; |
| 307 | } |
| 308 | } |
| 309 | else |
| 310 | { |
| 311 | /* esp is invalid as index */ |
| 312 | intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM; |
| 313 | } |
| 314 | return 2; |
| 315 | } |
| 316 | |
| 317 | static int i386_intel_simplify (expressionS *); |
| 318 | |
| 319 | static INLINE int i386_intel_simplify_symbol(symbolS *sym) |
| 320 | { |
| 321 | int ret = i386_intel_simplify (symbol_get_value_expression (sym)); |
| 322 | |
| 323 | if (ret == 2) |
| 324 | { |
| 325 | S_SET_SEGMENT(sym, absolute_section); |
| 326 | ret = 1; |
| 327 | } |
| 328 | return ret; |
| 329 | } |
| 330 | |
| 331 | static int i386_intel_simplify (expressionS *e) |
| 332 | { |
| 333 | const reg_entry *the_reg = (this_operand >= 0 |
| 334 | ? i.op[this_operand].regs : NULL); |
| 335 | const reg_entry *base = intel_state.base; |
| 336 | const reg_entry *state_index = intel_state.index; |
| 337 | int ret; |
| 338 | |
| 339 | if (!intel_syntax) |
| 340 | return 1; |
| 341 | |
| 342 | switch (e->X_op) |
| 343 | { |
| 344 | case O_index: |
| 345 | if (e->X_add_symbol) |
| 346 | { |
| 347 | if (!i386_intel_simplify_symbol (e->X_add_symbol) |
| 348 | || !i386_intel_check(the_reg, intel_state.base, |
| 349 | intel_state.index)) |
| 350 | return 0; |
| 351 | } |
| 352 | if (!intel_state.in_offset) |
| 353 | ++intel_state.in_bracket; |
| 354 | ret = i386_intel_simplify_symbol (e->X_op_symbol); |
| 355 | if (!intel_state.in_offset) |
| 356 | --intel_state.in_bracket; |
| 357 | if (!ret) |
| 358 | return 0; |
| 359 | if (e->X_add_symbol) |
| 360 | e->X_op = O_add; |
| 361 | else |
| 362 | i386_intel_fold (e, e->X_op_symbol); |
| 363 | break; |
| 364 | |
| 365 | case O_offset: |
| 366 | intel_state.has_offset = 1; |
| 367 | ++intel_state.in_offset; |
| 368 | ret = i386_intel_simplify_symbol (e->X_add_symbol); |
| 369 | --intel_state.in_offset; |
| 370 | if (!ret || !i386_intel_check(the_reg, base, state_index)) |
| 371 | return 0; |
| 372 | i386_intel_fold (e, e->X_add_symbol); |
| 373 | return ret; |
| 374 | |
| 375 | case O_byte_ptr: |
| 376 | case O_word_ptr: |
| 377 | case O_dword_ptr: |
| 378 | case O_fword_ptr: |
| 379 | case O_qword_ptr: |
| 380 | case O_tbyte_ptr: |
| 381 | case O_oword_ptr: |
| 382 | case O_xmmword_ptr: |
| 383 | case O_ymmword_ptr: |
| 384 | case O_zmmword_ptr: |
| 385 | case O_near_ptr: |
| 386 | case O_far_ptr: |
| 387 | if (intel_state.op_modifier == O_absent) |
| 388 | intel_state.op_modifier = e->X_op; |
| 389 | /* FALLTHROUGH */ |
| 390 | case O_short: |
| 391 | if (symbol_get_value_expression (e->X_add_symbol)->X_op |
| 392 | == O_register) |
| 393 | { |
| 394 | as_bad (_("invalid use of register")); |
| 395 | return 0; |
| 396 | } |
| 397 | if (!i386_intel_simplify_symbol (e->X_add_symbol)) |
| 398 | return 0; |
| 399 | i386_intel_fold (e, e->X_add_symbol); |
| 400 | break; |
| 401 | |
| 402 | case O_full_ptr: |
| 403 | if (symbol_get_value_expression (e->X_op_symbol)->X_op |
| 404 | == O_register) |
| 405 | { |
| 406 | as_bad (_("invalid use of register")); |
| 407 | return 0; |
| 408 | } |
| 409 | if (!i386_intel_simplify_symbol (e->X_op_symbol) |
| 410 | || !i386_intel_check(the_reg, intel_state.base, |
| 411 | intel_state.index)) |
| 412 | return 0; |
| 413 | if (!intel_state.in_offset) |
| 414 | intel_state.seg = e->X_add_symbol; |
| 415 | i386_intel_fold (e, e->X_op_symbol); |
| 416 | break; |
| 417 | |
| 418 | case O_multiply: |
| 419 | if (this_operand >= 0 && intel_state.in_bracket) |
| 420 | { |
| 421 | expressionS *scale = NULL; |
| 422 | int has_index = (intel_state.index != NULL); |
| 423 | |
| 424 | if (!intel_state.in_scale++) |
| 425 | intel_state.scale_factor = 1; |
| 426 | |
| 427 | ret = i386_intel_simplify_symbol (e->X_add_symbol); |
| 428 | if (ret && !has_index && intel_state.index) |
| 429 | scale = symbol_get_value_expression (e->X_op_symbol); |
| 430 | |
| 431 | if (ret) |
| 432 | ret = i386_intel_simplify_symbol (e->X_op_symbol); |
| 433 | if (ret && !scale && !has_index && intel_state.index) |
| 434 | scale = symbol_get_value_expression (e->X_add_symbol); |
| 435 | |
| 436 | if (ret && scale) |
| 437 | { |
| 438 | resolve_expression (scale); |
| 439 | if (scale->X_op != O_constant |
| 440 | || intel_state.index->reg_type.bitfield.reg16) |
| 441 | scale->X_add_number = 0; |
| 442 | intel_state.scale_factor *= scale->X_add_number; |
| 443 | } |
| 444 | |
| 445 | --intel_state.in_scale; |
| 446 | if (!ret) |
| 447 | return 0; |
| 448 | |
| 449 | if (!intel_state.in_scale) |
| 450 | switch (intel_state.scale_factor) |
| 451 | { |
| 452 | case 1: |
| 453 | i.log2_scale_factor = 0; |
| 454 | break; |
| 455 | case 2: |
| 456 | i.log2_scale_factor = 1; |
| 457 | break; |
| 458 | case 4: |
| 459 | i.log2_scale_factor = 2; |
| 460 | break; |
| 461 | case 8: |
| 462 | i.log2_scale_factor = 3; |
| 463 | break; |
| 464 | default: |
| 465 | /* esp is invalid as index */ |
| 466 | intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM; |
| 467 | break; |
| 468 | } |
| 469 | |
| 470 | break; |
| 471 | } |
| 472 | goto fallthrough; |
| 473 | |
| 474 | case O_register: |
| 475 | ret = i386_intel_simplify_register (e); |
| 476 | if (ret == 2) |
| 477 | { |
| 478 | gas_assert (e->X_add_number < (unsigned short) -1); |
| 479 | e->X_md = (unsigned short) e->X_add_number + 1; |
| 480 | e->X_op = O_constant; |
| 481 | e->X_add_number = 0; |
| 482 | } |
| 483 | return ret; |
| 484 | |
| 485 | case O_constant: |
| 486 | if (e->X_md) |
| 487 | return i386_intel_simplify_register (e); |
| 488 | |
| 489 | /* FALLTHROUGH */ |
| 490 | default: |
| 491 | fallthrough: |
| 492 | if (e->X_add_symbol |
| 493 | && !i386_intel_simplify_symbol (e->X_add_symbol)) |
| 494 | return 0; |
| 495 | if (e->X_op == O_add || e->X_op == O_subtract) |
| 496 | { |
| 497 | base = intel_state.base; |
| 498 | state_index = intel_state.index; |
| 499 | } |
| 500 | if (!i386_intel_check (the_reg, base, state_index) |
| 501 | || (e->X_op_symbol |
| 502 | && !i386_intel_simplify_symbol (e->X_op_symbol)) |
| 503 | || !i386_intel_check (the_reg, |
| 504 | (e->X_op != O_add |
| 505 | ? base : intel_state.base), |
| 506 | (e->X_op != O_add |
| 507 | ? state_index : intel_state.index))) |
| 508 | return 0; |
| 509 | break; |
| 510 | } |
| 511 | |
| 512 | if (this_operand >= 0 |
| 513 | && e->X_op == O_symbol |
| 514 | && !intel_state.in_offset) |
| 515 | { |
| 516 | segT seg = S_GET_SEGMENT (e->X_add_symbol); |
| 517 | |
| 518 | if (seg != absolute_section |
| 519 | && seg != reg_section |
| 520 | && seg != expr_section) |
| 521 | intel_state.is_mem |= 2 - !intel_state.in_bracket; |
| 522 | } |
| 523 | |
| 524 | return 1; |
| 525 | } |
| 526 | |
| 527 | int i386_need_index_operator (void) |
| 528 | { |
| 529 | return intel_syntax < 0; |
| 530 | } |
| 531 | |
| 532 | static int |
| 533 | i386_intel_operand (char *operand_string, int got_a_float) |
| 534 | { |
| 535 | char *saved_input_line_pointer, *buf; |
| 536 | segT exp_seg; |
| 537 | expressionS exp, *expP; |
| 538 | char suffix = 0; |
| 539 | int ret; |
| 540 | |
| 541 | /* Handle vector immediates. */ |
| 542 | if (RC_SAE_immediate (operand_string)) |
| 543 | return 1; |
| 544 | |
| 545 | /* Initialize state structure. */ |
| 546 | intel_state.op_modifier = O_absent; |
| 547 | intel_state.is_mem = 0; |
| 548 | intel_state.is_indirect = 0; |
| 549 | intel_state.has_offset = 0; |
| 550 | intel_state.base = NULL; |
| 551 | intel_state.index = NULL; |
| 552 | intel_state.seg = NULL; |
| 553 | operand_type_set (&intel_state.reloc_types, ~0); |
| 554 | gas_assert (!intel_state.in_offset); |
| 555 | gas_assert (!intel_state.in_bracket); |
| 556 | gas_assert (!intel_state.in_scale); |
| 557 | |
| 558 | saved_input_line_pointer = input_line_pointer; |
| 559 | input_line_pointer = buf = xstrdup (operand_string); |
| 560 | |
| 561 | intel_syntax = -1; |
| 562 | memset (&exp, 0, sizeof(exp)); |
| 563 | exp_seg = expression (&exp); |
| 564 | ret = i386_intel_simplify (&exp); |
| 565 | intel_syntax = 1; |
| 566 | |
| 567 | SKIP_WHITESPACE (); |
| 568 | |
| 569 | /* Handle vector operations. */ |
| 570 | if (*input_line_pointer == '{') |
| 571 | { |
| 572 | char *end = check_VecOperations (input_line_pointer, NULL); |
| 573 | if (end) |
| 574 | input_line_pointer = end; |
| 575 | else |
| 576 | ret = 0; |
| 577 | } |
| 578 | |
| 579 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) |
| 580 | { |
| 581 | as_bad (_("junk `%s' after expression"), input_line_pointer); |
| 582 | ret = 0; |
| 583 | } |
| 584 | else if (exp.X_op == O_illegal || exp.X_op == O_absent) |
| 585 | { |
| 586 | as_bad (_("invalid expression")); |
| 587 | ret = 0; |
| 588 | } |
| 589 | else if (!intel_state.has_offset |
| 590 | && input_line_pointer > buf |
| 591 | && *(input_line_pointer - 1) == ']') |
| 592 | { |
| 593 | intel_state.is_mem |= 1; |
| 594 | intel_state.is_indirect = 1; |
| 595 | } |
| 596 | |
| 597 | input_line_pointer = saved_input_line_pointer; |
| 598 | free (buf); |
| 599 | |
| 600 | gas_assert (!intel_state.in_offset); |
| 601 | gas_assert (!intel_state.in_bracket); |
| 602 | gas_assert (!intel_state.in_scale); |
| 603 | |
| 604 | if (!ret) |
| 605 | return 0; |
| 606 | |
| 607 | if (intel_state.op_modifier != O_absent |
| 608 | && current_templates->start->base_opcode != 0x8d /* lea */) |
| 609 | { |
| 610 | i.types[this_operand].bitfield.unspecified = 0; |
| 611 | |
| 612 | switch (intel_state.op_modifier) |
| 613 | { |
| 614 | case O_byte_ptr: |
| 615 | i.types[this_operand].bitfield.byte = 1; |
| 616 | suffix = BYTE_MNEM_SUFFIX; |
| 617 | break; |
| 618 | |
| 619 | case O_word_ptr: |
| 620 | i.types[this_operand].bitfield.word = 1; |
| 621 | if ((current_templates->start->name[0] == 'l' |
| 622 | && current_templates->start->name[2] == 's' |
| 623 | && current_templates->start->name[3] == 0) |
| 624 | || current_templates->start->base_opcode == 0x62 /* bound */) |
| 625 | suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ |
| 626 | else if (got_a_float == 2) /* "fi..." */ |
| 627 | suffix = SHORT_MNEM_SUFFIX; |
| 628 | else |
| 629 | suffix = WORD_MNEM_SUFFIX; |
| 630 | break; |
| 631 | |
| 632 | case O_dword_ptr: |
| 633 | i.types[this_operand].bitfield.dword = 1; |
| 634 | if ((current_templates->start->name[0] == 'l' |
| 635 | && current_templates->start->name[2] == 's' |
| 636 | && current_templates->start->name[3] == 0) |
| 637 | || current_templates->start->base_opcode == 0x62 /* bound */) |
| 638 | suffix = WORD_MNEM_SUFFIX; |
| 639 | else if (flag_code == CODE_16BIT |
| 640 | && (current_templates->start->opcode_modifier.jump |
| 641 | || current_templates->start->opcode_modifier.jumpdword)) |
| 642 | suffix = LONG_DOUBLE_MNEM_SUFFIX; |
| 643 | else if (got_a_float == 1) /* "f..." */ |
| 644 | suffix = SHORT_MNEM_SUFFIX; |
| 645 | else |
| 646 | suffix = LONG_MNEM_SUFFIX; |
| 647 | break; |
| 648 | |
| 649 | case O_fword_ptr: |
| 650 | i.types[this_operand].bitfield.fword = 1; |
| 651 | if (current_templates->start->name[0] == 'l' |
| 652 | && current_templates->start->name[2] == 's' |
| 653 | && current_templates->start->name[3] == 0) |
| 654 | suffix = LONG_MNEM_SUFFIX; |
| 655 | else if (!got_a_float) |
| 656 | { |
| 657 | if (flag_code == CODE_16BIT) |
| 658 | add_prefix (DATA_PREFIX_OPCODE); |
| 659 | suffix = LONG_DOUBLE_MNEM_SUFFIX; |
| 660 | } |
| 661 | else |
| 662 | suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ |
| 663 | break; |
| 664 | |
| 665 | case O_qword_ptr: |
| 666 | i.types[this_operand].bitfield.qword = 1; |
| 667 | if (current_templates->start->base_opcode == 0x62 /* bound */ |
| 668 | || got_a_float == 1) /* "f..." */ |
| 669 | suffix = LONG_MNEM_SUFFIX; |
| 670 | else |
| 671 | suffix = QWORD_MNEM_SUFFIX; |
| 672 | break; |
| 673 | |
| 674 | case O_tbyte_ptr: |
| 675 | i.types[this_operand].bitfield.tbyte = 1; |
| 676 | if (got_a_float == 1) |
| 677 | suffix = LONG_DOUBLE_MNEM_SUFFIX; |
| 678 | else |
| 679 | suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ |
| 680 | break; |
| 681 | |
| 682 | case O_oword_ptr: |
| 683 | case O_xmmword_ptr: |
| 684 | i.types[this_operand].bitfield.xmmword = 1; |
| 685 | suffix = XMMWORD_MNEM_SUFFIX; |
| 686 | break; |
| 687 | |
| 688 | case O_ymmword_ptr: |
| 689 | i.types[this_operand].bitfield.ymmword = 1; |
| 690 | suffix = YMMWORD_MNEM_SUFFIX; |
| 691 | break; |
| 692 | |
| 693 | case O_zmmword_ptr: |
| 694 | i.types[this_operand].bitfield.zmmword = 1; |
| 695 | suffix = ZMMWORD_MNEM_SUFFIX; |
| 696 | break; |
| 697 | |
| 698 | case O_far_ptr: |
| 699 | suffix = LONG_DOUBLE_MNEM_SUFFIX; |
| 700 | /* FALLTHROUGH */ |
| 701 | case O_near_ptr: |
| 702 | if (!current_templates->start->opcode_modifier.jump |
| 703 | && !current_templates->start->opcode_modifier.jumpdword) |
| 704 | suffix = got_a_float /* so it will cause an error */ |
| 705 | ? BYTE_MNEM_SUFFIX |
| 706 | : LONG_DOUBLE_MNEM_SUFFIX; |
| 707 | break; |
| 708 | |
| 709 | default: |
| 710 | BAD_CASE (intel_state.op_modifier); |
| 711 | break; |
| 712 | } |
| 713 | |
| 714 | if (!i.suffix) |
| 715 | i.suffix = suffix; |
| 716 | else if (i.suffix != suffix) |
| 717 | { |
| 718 | as_bad (_("conflicting operand size modifiers")); |
| 719 | return 0; |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | /* Operands for jump/call need special consideration. */ |
| 724 | if (current_templates->start->opcode_modifier.jump |
| 725 | || current_templates->start->opcode_modifier.jumpdword |
| 726 | || current_templates->start->opcode_modifier.jumpintersegment) |
| 727 | { |
| 728 | if (i.op[this_operand].regs |
| 729 | || intel_state.base |
| 730 | || intel_state.index |
| 731 | || intel_state.is_mem > 1) |
| 732 | i.types[this_operand].bitfield.jumpabsolute = 1; |
| 733 | else |
| 734 | switch (intel_state.op_modifier) |
| 735 | { |
| 736 | case O_near_ptr: |
| 737 | if (intel_state.seg) |
| 738 | i.types[this_operand].bitfield.jumpabsolute = 1; |
| 739 | else |
| 740 | intel_state.is_mem = 1; |
| 741 | break; |
| 742 | case O_far_ptr: |
| 743 | case O_absent: |
| 744 | if (!intel_state.seg) |
| 745 | { |
| 746 | intel_state.is_mem = 1; |
| 747 | if (intel_state.op_modifier == O_absent) |
| 748 | { |
| 749 | if (intel_state.is_indirect == 1) |
| 750 | i.types[this_operand].bitfield.jumpabsolute = 1; |
| 751 | break; |
| 752 | } |
| 753 | as_bad (_("cannot infer the segment part of the operand")); |
| 754 | return 0; |
| 755 | } |
| 756 | else if (S_GET_SEGMENT (intel_state.seg) == reg_section) |
| 757 | i.types[this_operand].bitfield.jumpabsolute = 1; |
| 758 | else |
| 759 | { |
| 760 | i386_operand_type types; |
| 761 | |
| 762 | if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS) |
| 763 | { |
| 764 | as_bad (_("at most %d immediate operands are allowed"), |
| 765 | MAX_IMMEDIATE_OPERANDS); |
| 766 | return 0; |
| 767 | } |
| 768 | expP = &im_expressions[i.imm_operands++]; |
| 769 | memset (expP, 0, sizeof(*expP)); |
| 770 | expP->X_op = O_symbol; |
| 771 | expP->X_add_symbol = intel_state.seg; |
| 772 | i.op[this_operand].imms = expP; |
| 773 | |
| 774 | resolve_expression (expP); |
| 775 | operand_type_set (&types, ~0); |
| 776 | if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state.seg), |
| 777 | expP, types, operand_string)) |
| 778 | return 0; |
| 779 | if (i.operands < MAX_OPERANDS) |
| 780 | { |
| 781 | this_operand = i.operands++; |
| 782 | i.types[this_operand].bitfield.unspecified = 1; |
| 783 | } |
| 784 | if (suffix == LONG_DOUBLE_MNEM_SUFFIX) |
| 785 | i.suffix = 0; |
| 786 | intel_state.seg = NULL; |
| 787 | intel_state.is_mem = 0; |
| 788 | } |
| 789 | break; |
| 790 | default: |
| 791 | i.types[this_operand].bitfield.jumpabsolute = 1; |
| 792 | break; |
| 793 | } |
| 794 | if (i.types[this_operand].bitfield.jumpabsolute) |
| 795 | intel_state.is_mem |= 1; |
| 796 | } |
| 797 | else if (intel_state.seg) |
| 798 | intel_state.is_mem |= 1; |
| 799 | |
| 800 | if (i.op[this_operand].regs) |
| 801 | { |
| 802 | i386_operand_type temp; |
| 803 | |
| 804 | /* Register operand. */ |
| 805 | if (intel_state.base || intel_state.index || intel_state.seg) |
| 806 | { |
| 807 | as_bad (_("invalid operand")); |
| 808 | return 0; |
| 809 | } |
| 810 | |
| 811 | temp = i.op[this_operand].regs->reg_type; |
| 812 | temp.bitfield.baseindex = 0; |
| 813 | i.types[this_operand] = operand_type_or (i.types[this_operand], |
| 814 | temp); |
| 815 | i.types[this_operand].bitfield.unspecified = 0; |
| 816 | ++i.reg_operands; |
| 817 | } |
| 818 | else if (intel_state.base |
| 819 | || intel_state.index |
| 820 | || intel_state.seg |
| 821 | || intel_state.is_mem) |
| 822 | { |
| 823 | /* Memory operand. */ |
| 824 | if ((int) i.mem_operands |
| 825 | >= 2 - !current_templates->start->opcode_modifier.isstring) |
| 826 | { |
| 827 | /* Handle |
| 828 | |
| 829 | call 0x9090,0x90909090 |
| 830 | lcall 0x9090,0x90909090 |
| 831 | jmp 0x9090,0x90909090 |
| 832 | ljmp 0x9090,0x90909090 |
| 833 | */ |
| 834 | |
| 835 | if ((current_templates->start->opcode_modifier.jumpintersegment |
| 836 | || current_templates->start->opcode_modifier.jumpdword |
| 837 | || current_templates->start->opcode_modifier.jump) |
| 838 | && this_operand == 1 |
| 839 | && intel_state.seg == NULL |
| 840 | && i.mem_operands == 1 |
| 841 | && i.disp_operands == 1 |
| 842 | && intel_state.op_modifier == O_absent) |
| 843 | { |
| 844 | /* Try to process the first operand as immediate, */ |
| 845 | this_operand = 0; |
| 846 | if (i386_finalize_immediate (exp_seg, i.op[0].imms, |
| 847 | intel_state.reloc_types, |
| 848 | NULL)) |
| 849 | { |
| 850 | this_operand = 1; |
| 851 | expP = &im_expressions[0]; |
| 852 | i.op[this_operand].imms = expP; |
| 853 | *expP = exp; |
| 854 | |
| 855 | /* Try to process the second operand as immediate, */ |
| 856 | if (i386_finalize_immediate (exp_seg, expP, |
| 857 | intel_state.reloc_types, |
| 858 | NULL)) |
| 859 | { |
| 860 | i.mem_operands = 0; |
| 861 | i.disp_operands = 0; |
| 862 | i.imm_operands = 2; |
| 863 | i.types[0].bitfield.mem = 0; |
| 864 | i.types[0].bitfield.disp16 = 0; |
| 865 | i.types[0].bitfield.disp32 = 0; |
| 866 | i.types[0].bitfield.disp32s = 0; |
| 867 | return 1; |
| 868 | } |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | as_bad (_("too many memory references for `%s'"), |
| 873 | current_templates->start->name); |
| 874 | return 0; |
| 875 | } |
| 876 | |
| 877 | expP = &disp_expressions[i.disp_operands]; |
| 878 | memcpy (expP, &exp, sizeof(exp)); |
| 879 | resolve_expression (expP); |
| 880 | |
| 881 | if (expP->X_op != O_constant |
| 882 | || expP->X_add_number |
| 883 | || (!intel_state.base |
| 884 | && !intel_state.index)) |
| 885 | { |
| 886 | i.op[this_operand].disps = expP; |
| 887 | i.disp_operands++; |
| 888 | |
| 889 | if (flag_code == CODE_64BIT) |
| 890 | { |
| 891 | i.types[this_operand].bitfield.disp32 = 1; |
| 892 | if (!i.prefix[ADDR_PREFIX]) |
| 893 | { |
| 894 | i.types[this_operand].bitfield.disp64 = 1; |
| 895 | i.types[this_operand].bitfield.disp32s = 1; |
| 896 | } |
| 897 | } |
| 898 | else if (!i.prefix[ADDR_PREFIX] ^ (flag_code == CODE_16BIT)) |
| 899 | i.types[this_operand].bitfield.disp32 = 1; |
| 900 | else |
| 901 | i.types[this_operand].bitfield.disp16 = 1; |
| 902 | |
| 903 | #if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT) |
| 904 | /* |
| 905 | * exp_seg is used only for verification in |
| 906 | * i386_finalize_displacement, and we can end up seeing reg_section |
| 907 | * here - but we know we removed all registers from the expression |
| 908 | * (or error-ed on any remaining ones) in i386_intel_simplify. I |
| 909 | * consider the check in i386_finalize_displacement bogus anyway, in |
| 910 | * particular because it doesn't allow for expr_section, so I'd |
| 911 | * rather see that check (and the similar one in |
| 912 | * i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out |
| 913 | * expert I can't really say whether that would have other bad side |
| 914 | * effects. |
| 915 | */ |
| 916 | if (OUTPUT_FLAVOR == bfd_target_aout_flavour |
| 917 | && exp_seg == reg_section) |
| 918 | exp_seg = expP->X_op != O_constant ? undefined_section |
| 919 | : absolute_section; |
| 920 | #endif |
| 921 | |
| 922 | if (!i386_finalize_displacement (exp_seg, expP, |
| 923 | intel_state.reloc_types, |
| 924 | operand_string)) |
| 925 | return 0; |
| 926 | } |
| 927 | |
| 928 | if (intel_state.base || intel_state.index) |
| 929 | i.types[this_operand].bitfield.baseindex = 1; |
| 930 | |
| 931 | if (intel_state.seg) |
| 932 | { |
| 933 | for (;;) |
| 934 | { |
| 935 | expP = symbol_get_value_expression (intel_state.seg); |
| 936 | if (expP->X_op != O_full_ptr) |
| 937 | break; |
| 938 | intel_state.seg = expP->X_add_symbol; |
| 939 | } |
| 940 | if (expP->X_op != O_register) |
| 941 | { |
| 942 | as_bad (_("segment register name expected")); |
| 943 | return 0; |
| 944 | } |
| 945 | if (!i386_regtab[expP->X_add_number].reg_type.bitfield.sreg2 |
| 946 | && !i386_regtab[expP->X_add_number].reg_type.bitfield.sreg3) |
| 947 | { |
| 948 | as_bad (_("invalid use of register")); |
| 949 | return 0; |
| 950 | } |
| 951 | switch (i386_regtab[expP->X_add_number].reg_num) |
| 952 | { |
| 953 | case 0: i.seg[i.mem_operands] = &es; break; |
| 954 | case 1: i.seg[i.mem_operands] = &cs; break; |
| 955 | case 2: i.seg[i.mem_operands] = &ss; break; |
| 956 | case 3: i.seg[i.mem_operands] = &ds; break; |
| 957 | case 4: i.seg[i.mem_operands] = &fs; break; |
| 958 | case 5: i.seg[i.mem_operands] = &gs; break; |
| 959 | case RegFlat: i.seg[i.mem_operands] = NULL; break; |
| 960 | } |
| 961 | } |
| 962 | |
| 963 | /* Swap base and index in 16-bit memory operands like |
| 964 | [si+bx]. Since i386_index_check is also used in AT&T |
| 965 | mode we have to do that here. */ |
| 966 | if (intel_state.base |
| 967 | && intel_state.index |
| 968 | && intel_state.base->reg_type.bitfield.reg16 |
| 969 | && intel_state.index->reg_type.bitfield.reg16 |
| 970 | && intel_state.base->reg_num >= 6 |
| 971 | && intel_state.index->reg_num < 6) |
| 972 | { |
| 973 | i.base_reg = intel_state.index; |
| 974 | i.index_reg = intel_state.base; |
| 975 | } |
| 976 | else |
| 977 | { |
| 978 | i.base_reg = intel_state.base; |
| 979 | i.index_reg = intel_state.index; |
| 980 | } |
| 981 | |
| 982 | if (!i386_index_check (operand_string)) |
| 983 | return 0; |
| 984 | |
| 985 | i.types[this_operand].bitfield.mem = 1; |
| 986 | ++i.mem_operands; |
| 987 | } |
| 988 | else |
| 989 | { |
| 990 | /* Immediate. */ |
| 991 | if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS) |
| 992 | { |
| 993 | as_bad (_("at most %d immediate operands are allowed"), |
| 994 | MAX_IMMEDIATE_OPERANDS); |
| 995 | return 0; |
| 996 | } |
| 997 | |
| 998 | expP = &im_expressions[i.imm_operands++]; |
| 999 | i.op[this_operand].imms = expP; |
| 1000 | *expP = exp; |
| 1001 | |
| 1002 | return i386_finalize_immediate (exp_seg, expP, intel_state.reloc_types, |
| 1003 | operand_string); |
| 1004 | } |
| 1005 | |
| 1006 | return 1; |
| 1007 | } |