1 /* tc-i386.c -- Assemble Intel syntax code for ix86/x86-64
2 Copyright (C) 2009-2014 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 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
i386_operator(const char * name,unsigned int operands,char * pc)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 (i.bnd_prefix != NULL
146 || add_bnd_prefix));
147
148 if (!gotfree_input_line)
149 break;
150 free (gotfree_input_line);
151 *input_line_pointer++ = '+';
152 memset (input_line_pointer, '0', adjust - 1);
153 input_line_pointer[adjust - 1] = ' ';
154 return O_add;
155 }
156 break;
157 }
158 return O_illegal;
159 }
160
161 for (j = 0; i386_operators[j].name; ++j)
162 if (strcasecmp (i386_operators[j].name, name) == 0)
163 {
164 if (i386_operators[j].operands
165 && i386_operators[j].operands != operands)
166 return O_illegal;
167 return i386_operators[j].op;
168 }
169
170 for (j = 0; i386_types[j].name; ++j)
171 if (strcasecmp (i386_types[j].name, name) == 0)
172 break;
173 if (i386_types[j].name && *pc == ' ')
174 {
175 char *pname = ++input_line_pointer;
176 char c = get_symbol_end ();
177
178 if (strcasecmp (pname, "ptr") == 0)
179 {
180 pname[-1] = *pc;
181 *pc = c;
182 if (intel_syntax > 0 || operands != 1)
183 return O_illegal;
184 return i386_types[j].op;
185 }
186
187 *input_line_pointer = c;
188 input_line_pointer = pname - 1;
189 }
190
191 return O_absent;
192 }
193
i386_intel_parse_name(const char * name,expressionS * e)194 static int i386_intel_parse_name (const char *name, expressionS *e)
195 {
196 unsigned int j;
197
198 if (! strcmp (name, "$"))
199 {
200 current_location (e);
201 return 1;
202 }
203
204 for (j = 0; i386_types[j].name; ++j)
205 if (strcasecmp(i386_types[j].name, name) == 0)
206 {
207 e->X_op = O_constant;
208 e->X_add_number = i386_types[j].sz[flag_code];
209 e->X_add_symbol = NULL;
210 e->X_op_symbol = NULL;
211 return 1;
212 }
213
214 return 0;
215 }
216
i386_intel_check(const reg_entry * rreg,const reg_entry * base,const reg_entry * iindex)217 static INLINE int i386_intel_check (const reg_entry *rreg,
218 const reg_entry *base,
219 const reg_entry *iindex)
220 {
221 if ((this_operand >= 0
222 && rreg != i.op[this_operand].regs)
223 || base != intel_state.base
224 || iindex != intel_state.index)
225 {
226 as_bad (_("invalid use of register"));
227 return 0;
228 }
229 return 1;
230 }
231
i386_intel_fold(expressionS * e,symbolS * sym)232 static INLINE void i386_intel_fold (expressionS *e, symbolS *sym)
233 {
234 expressionS *exp = symbol_get_value_expression (sym);
235 if (S_GET_SEGMENT (sym) == absolute_section)
236 {
237 offsetT val = e->X_add_number;
238
239 *e = *exp;
240 e->X_add_number += val;
241 }
242 else
243 {
244 if (exp->X_op == O_symbol
245 && strcmp (S_GET_NAME (exp->X_add_symbol),
246 GLOBAL_OFFSET_TABLE_NAME) == 0)
247 sym = exp->X_add_symbol;
248 e->X_add_symbol = sym;
249 e->X_op_symbol = NULL;
250 e->X_op = O_symbol;
251 }
252 }
253
254 static int
i386_intel_simplify_register(expressionS * e)255 i386_intel_simplify_register (expressionS *e)
256 {
257 int reg_num;
258
259 if (this_operand < 0 || intel_state.in_offset)
260 {
261 as_bad (_("invalid use of register"));
262 return 0;
263 }
264
265 if (e->X_op == O_register)
266 reg_num = e->X_add_number;
267 else
268 reg_num = e->X_md - 1;
269
270 if (!intel_state.in_bracket)
271 {
272 if (i.op[this_operand].regs)
273 {
274 as_bad (_("invalid use of register"));
275 return 0;
276 }
277 if (i386_regtab[reg_num].reg_type.bitfield.sreg3
278 && i386_regtab[reg_num].reg_num == RegFlat)
279 {
280 as_bad (_("invalid use of pseudo-register"));
281 return 0;
282 }
283 i.op[this_operand].regs = i386_regtab + reg_num;
284 }
285 else if (!intel_state.index
286 && (i386_regtab[reg_num].reg_type.bitfield.regxmm
287 || i386_regtab[reg_num].reg_type.bitfield.regymm
288 || i386_regtab[reg_num].reg_type.bitfield.regzmm))
289 intel_state.index = i386_regtab + reg_num;
290 else if (!intel_state.base && !intel_state.in_scale)
291 intel_state.base = i386_regtab + reg_num;
292 else if (!intel_state.index)
293 {
294 if (intel_state.in_scale
295 || current_templates->start->base_opcode == 0xf30f1b /* bndmk */
296 || (current_templates->start->base_opcode & ~1) == 0x0f1a /* bnd{ld,st}x */
297 || i386_regtab[reg_num].reg_type.bitfield.baseindex)
298 intel_state.index = i386_regtab + reg_num;
299 else
300 {
301 /* Convert base to index and make ESP/RSP the base. */
302 intel_state.index = intel_state.base;
303 intel_state.base = i386_regtab + reg_num;
304 }
305 }
306 else
307 {
308 /* esp is invalid as index */
309 intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM;
310 }
311 return 2;
312 }
313
314 static int i386_intel_simplify (expressionS *);
315
i386_intel_simplify_symbol(symbolS * sym)316 static INLINE int i386_intel_simplify_symbol(symbolS *sym)
317 {
318 int ret = i386_intel_simplify (symbol_get_value_expression (sym));
319
320 if (ret == 2)
321 {
322 S_SET_SEGMENT(sym, absolute_section);
323 ret = 1;
324 }
325 return ret;
326 }
327
i386_intel_simplify(expressionS * e)328 static int i386_intel_simplify (expressionS *e)
329 {
330 const reg_entry *the_reg = (this_operand >= 0
331 ? i.op[this_operand].regs : NULL);
332 const reg_entry *base = intel_state.base;
333 const reg_entry *state_index = intel_state.index;
334 int ret;
335
336 if (!intel_syntax)
337 return 1;
338
339 switch (e->X_op)
340 {
341 case O_index:
342 if (e->X_add_symbol)
343 {
344 if (!i386_intel_simplify_symbol (e->X_add_symbol)
345 || !i386_intel_check(the_reg, intel_state.base,
346 intel_state.index))
347 return 0;
348 }
349 if (!intel_state.in_offset)
350 ++intel_state.in_bracket;
351 ret = i386_intel_simplify_symbol (e->X_op_symbol);
352 if (!intel_state.in_offset)
353 --intel_state.in_bracket;
354 if (!ret)
355 return 0;
356 if (e->X_add_symbol)
357 e->X_op = O_add;
358 else
359 i386_intel_fold (e, e->X_op_symbol);
360 break;
361
362 case O_offset:
363 intel_state.has_offset = 1;
364 ++intel_state.in_offset;
365 ret = i386_intel_simplify_symbol (e->X_add_symbol);
366 --intel_state.in_offset;
367 if (!ret || !i386_intel_check(the_reg, base, state_index))
368 return 0;
369 i386_intel_fold (e, e->X_add_symbol);
370 return ret;
371
372 case O_byte_ptr:
373 case O_word_ptr:
374 case O_dword_ptr:
375 case O_fword_ptr:
376 case O_qword_ptr:
377 case O_tbyte_ptr:
378 case O_oword_ptr:
379 case O_xmmword_ptr:
380 case O_ymmword_ptr:
381 case O_zmmword_ptr:
382 case O_near_ptr:
383 case O_far_ptr:
384 if (intel_state.op_modifier == O_absent)
385 intel_state.op_modifier = e->X_op;
386 /* FALLTHROUGH */
387 case O_short:
388 if (symbol_get_value_expression (e->X_add_symbol)->X_op
389 == O_register)
390 {
391 as_bad (_("invalid use of register"));
392 return 0;
393 }
394 if (!i386_intel_simplify_symbol (e->X_add_symbol))
395 return 0;
396 i386_intel_fold (e, e->X_add_symbol);
397 break;
398
399 case O_full_ptr:
400 if (symbol_get_value_expression (e->X_op_symbol)->X_op
401 == O_register)
402 {
403 as_bad (_("invalid use of register"));
404 return 0;
405 }
406 if (!i386_intel_simplify_symbol (e->X_op_symbol)
407 || !i386_intel_check(the_reg, intel_state.base,
408 intel_state.index))
409 return 0;
410 if (!intel_state.in_offset)
411 intel_state.seg = e->X_add_symbol;
412 i386_intel_fold (e, e->X_op_symbol);
413 break;
414
415 case O_multiply:
416 if (this_operand >= 0 && intel_state.in_bracket)
417 {
418 expressionS *scale = NULL;
419 int has_index = (intel_state.index != NULL);
420
421 if (!intel_state.in_scale++)
422 intel_state.scale_factor = 1;
423
424 ret = i386_intel_simplify_symbol (e->X_add_symbol);
425 if (ret && !has_index && intel_state.index)
426 scale = symbol_get_value_expression (e->X_op_symbol);
427
428 if (ret)
429 ret = i386_intel_simplify_symbol (e->X_op_symbol);
430 if (ret && !scale && !has_index && intel_state.index)
431 scale = symbol_get_value_expression (e->X_add_symbol);
432
433 if (ret && scale)
434 {
435 resolve_expression (scale);
436 if (scale->X_op != O_constant
437 || intel_state.index->reg_type.bitfield.reg16)
438 scale->X_add_number = 0;
439 intel_state.scale_factor *= scale->X_add_number;
440 }
441
442 --intel_state.in_scale;
443 if (!ret)
444 return 0;
445
446 if (!intel_state.in_scale)
447 switch (intel_state.scale_factor)
448 {
449 case 1:
450 i.log2_scale_factor = 0;
451 break;
452 case 2:
453 i.log2_scale_factor = 1;
454 break;
455 case 4:
456 i.log2_scale_factor = 2;
457 break;
458 case 8:
459 i.log2_scale_factor = 3;
460 break;
461 default:
462 /* esp is invalid as index */
463 intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM;
464 break;
465 }
466
467 break;
468 }
469 goto fallthrough;
470
471 case O_register:
472 ret = i386_intel_simplify_register (e);
473 if (ret == 2)
474 {
475 gas_assert (e->X_add_number < (unsigned short) -1);
476 e->X_md = (unsigned short) e->X_add_number + 1;
477 e->X_op = O_constant;
478 e->X_add_number = 0;
479 }
480 return ret;
481
482 case O_constant:
483 if (e->X_md)
484 return i386_intel_simplify_register (e);
485
486 /* FALLTHROUGH */
487 default:
488 fallthrough:
489 if (e->X_add_symbol
490 && !i386_intel_simplify_symbol (e->X_add_symbol))
491 return 0;
492 if (e->X_op == O_add || e->X_op == O_subtract)
493 {
494 base = intel_state.base;
495 state_index = intel_state.index;
496 }
497 if (!i386_intel_check (the_reg, base, state_index)
498 || (e->X_op_symbol
499 && !i386_intel_simplify_symbol (e->X_op_symbol))
500 || !i386_intel_check (the_reg,
501 (e->X_op != O_add
502 ? base : intel_state.base),
503 (e->X_op != O_add
504 ? state_index : intel_state.index)))
505 return 0;
506 break;
507 }
508
509 if (this_operand >= 0
510 && e->X_op == O_symbol
511 && !intel_state.in_offset)
512 {
513 segT seg = S_GET_SEGMENT (e->X_add_symbol);
514
515 if (seg != absolute_section
516 && seg != reg_section
517 && seg != expr_section)
518 intel_state.is_mem |= 2 - !intel_state.in_bracket;
519 }
520
521 return 1;
522 }
523
i386_need_index_operator(void)524 int i386_need_index_operator (void)
525 {
526 return intel_syntax < 0;
527 }
528
529 static int
i386_intel_operand(char * operand_string,int got_a_float)530 i386_intel_operand (char *operand_string, int got_a_float)
531 {
532 char *saved_input_line_pointer, *buf;
533 segT exp_seg;
534 expressionS exp, *expP;
535 char suffix = 0;
536 int ret;
537
538 /* Handle vector immediates. */
539 if (RC_SAE_immediate (operand_string))
540 return 1;
541
542 /* Initialize state structure. */
543 intel_state.op_modifier = O_absent;
544 intel_state.is_mem = 0;
545 intel_state.is_indirect = 0;
546 intel_state.has_offset = 0;
547 intel_state.base = NULL;
548 intel_state.index = NULL;
549 intel_state.seg = NULL;
550 operand_type_set (&intel_state.reloc_types, ~0);
551 gas_assert (!intel_state.in_offset);
552 gas_assert (!intel_state.in_bracket);
553 gas_assert (!intel_state.in_scale);
554
555 saved_input_line_pointer = input_line_pointer;
556 input_line_pointer = buf = xstrdup (operand_string);
557
558 intel_syntax = -1;
559 memset (&exp, 0, sizeof(exp));
560 exp_seg = expression (&exp);
561 ret = i386_intel_simplify (&exp);
562 intel_syntax = 1;
563
564 SKIP_WHITESPACE ();
565
566 /* Handle vector operations. */
567 if (*input_line_pointer == '{')
568 {
569 char *end = check_VecOperations (input_line_pointer, NULL);
570 if (end)
571 input_line_pointer = end;
572 else
573 ret = 0;
574 }
575
576 if (!is_end_of_line[(unsigned char) *input_line_pointer])
577 {
578 as_bad (_("junk `%s' after expression"), input_line_pointer);
579 ret = 0;
580 }
581 else if (exp.X_op == O_illegal || exp.X_op == O_absent)
582 {
583 as_bad (_("invalid expression"));
584 ret = 0;
585 }
586 else if (!intel_state.has_offset
587 && input_line_pointer > buf
588 && *(input_line_pointer - 1) == ']')
589 {
590 intel_state.is_mem |= 1;
591 intel_state.is_indirect = 1;
592 }
593
594 input_line_pointer = saved_input_line_pointer;
595 free (buf);
596
597 gas_assert (!intel_state.in_offset);
598 gas_assert (!intel_state.in_bracket);
599 gas_assert (!intel_state.in_scale);
600
601 if (!ret)
602 return 0;
603
604 if (intel_state.op_modifier != O_absent
605 && current_templates->start->base_opcode != 0x8d /* lea */)
606 {
607 i.types[this_operand].bitfield.unspecified = 0;
608
609 switch (intel_state.op_modifier)
610 {
611 case O_byte_ptr:
612 i.types[this_operand].bitfield.byte = 1;
613 suffix = BYTE_MNEM_SUFFIX;
614 break;
615
616 case O_word_ptr:
617 i.types[this_operand].bitfield.word = 1;
618 if ((current_templates->start->name[0] == 'l'
619 && current_templates->start->name[2] == 's'
620 && current_templates->start->name[3] == 0)
621 || current_templates->start->base_opcode == 0x62 /* bound */)
622 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
623 else if (got_a_float == 2) /* "fi..." */
624 suffix = SHORT_MNEM_SUFFIX;
625 else
626 suffix = WORD_MNEM_SUFFIX;
627 break;
628
629 case O_dword_ptr:
630 i.types[this_operand].bitfield.dword = 1;
631 if ((current_templates->start->name[0] == 'l'
632 && current_templates->start->name[2] == 's'
633 && current_templates->start->name[3] == 0)
634 || current_templates->start->base_opcode == 0x62 /* bound */)
635 suffix = WORD_MNEM_SUFFIX;
636 else if (flag_code == CODE_16BIT
637 && (current_templates->start->opcode_modifier.jump
638 || current_templates->start->opcode_modifier.jumpdword))
639 suffix = LONG_DOUBLE_MNEM_SUFFIX;
640 else if (got_a_float == 1) /* "f..." */
641 suffix = SHORT_MNEM_SUFFIX;
642 else
643 suffix = LONG_MNEM_SUFFIX;
644 break;
645
646 case O_fword_ptr:
647 i.types[this_operand].bitfield.fword = 1;
648 if (current_templates->start->name[0] == 'l'
649 && current_templates->start->name[2] == 's'
650 && current_templates->start->name[3] == 0)
651 suffix = LONG_MNEM_SUFFIX;
652 else if (!got_a_float)
653 {
654 if (flag_code == CODE_16BIT)
655 add_prefix (DATA_PREFIX_OPCODE);
656 suffix = LONG_DOUBLE_MNEM_SUFFIX;
657 }
658 else
659 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
660 break;
661
662 case O_qword_ptr:
663 i.types[this_operand].bitfield.qword = 1;
664 if (current_templates->start->base_opcode == 0x62 /* bound */
665 || got_a_float == 1) /* "f..." */
666 suffix = LONG_MNEM_SUFFIX;
667 else
668 suffix = QWORD_MNEM_SUFFIX;
669 break;
670
671 case O_tbyte_ptr:
672 i.types[this_operand].bitfield.tbyte = 1;
673 if (got_a_float == 1)
674 suffix = LONG_DOUBLE_MNEM_SUFFIX;
675 else
676 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
677 break;
678
679 case O_oword_ptr:
680 case O_xmmword_ptr:
681 i.types[this_operand].bitfield.xmmword = 1;
682 suffix = XMMWORD_MNEM_SUFFIX;
683 break;
684
685 case O_ymmword_ptr:
686 i.types[this_operand].bitfield.ymmword = 1;
687 suffix = YMMWORD_MNEM_SUFFIX;
688 break;
689
690 case O_zmmword_ptr:
691 i.types[this_operand].bitfield.zmmword = 1;
692 suffix = ZMMWORD_MNEM_SUFFIX;
693 break;
694
695 case O_far_ptr:
696 suffix = LONG_DOUBLE_MNEM_SUFFIX;
697 /* FALLTHROUGH */
698 case O_near_ptr:
699 if (!current_templates->start->opcode_modifier.jump
700 && !current_templates->start->opcode_modifier.jumpdword)
701 suffix = got_a_float /* so it will cause an error */
702 ? BYTE_MNEM_SUFFIX
703 : LONG_DOUBLE_MNEM_SUFFIX;
704 break;
705
706 default:
707 BAD_CASE (intel_state.op_modifier);
708 break;
709 }
710
711 if (!i.suffix)
712 i.suffix = suffix;
713 else if (i.suffix != suffix)
714 {
715 as_bad (_("conflicting operand size modifiers"));
716 return 0;
717 }
718 }
719
720 /* Operands for jump/call need special consideration. */
721 if (current_templates->start->opcode_modifier.jump
722 || current_templates->start->opcode_modifier.jumpdword
723 || current_templates->start->opcode_modifier.jumpintersegment)
724 {
725 if (i.op[this_operand].regs
726 || intel_state.base
727 || intel_state.index
728 || intel_state.is_mem > 1)
729 i.types[this_operand].bitfield.jumpabsolute = 1;
730 else
731 switch (intel_state.op_modifier)
732 {
733 case O_near_ptr:
734 if (intel_state.seg)
735 i.types[this_operand].bitfield.jumpabsolute = 1;
736 else
737 intel_state.is_mem = 1;
738 break;
739 case O_far_ptr:
740 case O_absent:
741 if (!intel_state.seg)
742 {
743 intel_state.is_mem = 1;
744 if (intel_state.op_modifier == O_absent)
745 {
746 if (intel_state.is_indirect == 1)
747 i.types[this_operand].bitfield.jumpabsolute = 1;
748 break;
749 }
750 as_bad (_("cannot infer the segment part of the operand"));
751 return 0;
752 }
753 else if (S_GET_SEGMENT (intel_state.seg) == reg_section)
754 i.types[this_operand].bitfield.jumpabsolute = 1;
755 else
756 {
757 i386_operand_type types;
758
759 if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS)
760 {
761 as_bad (_("at most %d immediate operands are allowed"),
762 MAX_IMMEDIATE_OPERANDS);
763 return 0;
764 }
765 expP = &im_expressions[i.imm_operands++];
766 memset (expP, 0, sizeof(*expP));
767 expP->X_op = O_symbol;
768 expP->X_add_symbol = intel_state.seg;
769 i.op[this_operand].imms = expP;
770
771 resolve_expression (expP);
772 operand_type_set (&types, ~0);
773 if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state.seg),
774 expP, types, operand_string))
775 return 0;
776 if (i.operands < MAX_OPERANDS)
777 {
778 this_operand = i.operands++;
779 i.types[this_operand].bitfield.unspecified = 1;
780 }
781 if (suffix == LONG_DOUBLE_MNEM_SUFFIX)
782 i.suffix = 0;
783 intel_state.seg = NULL;
784 intel_state.is_mem = 0;
785 }
786 break;
787 default:
788 i.types[this_operand].bitfield.jumpabsolute = 1;
789 break;
790 }
791 if (i.types[this_operand].bitfield.jumpabsolute)
792 intel_state.is_mem |= 1;
793 }
794 else if (intel_state.seg)
795 intel_state.is_mem |= 1;
796
797 if (i.op[this_operand].regs)
798 {
799 i386_operand_type temp;
800
801 /* Register operand. */
802 if (intel_state.base || intel_state.index || intel_state.seg)
803 {
804 as_bad (_("invalid operand"));
805 return 0;
806 }
807
808 temp = i.op[this_operand].regs->reg_type;
809 temp.bitfield.baseindex = 0;
810 i.types[this_operand] = operand_type_or (i.types[this_operand],
811 temp);
812 i.types[this_operand].bitfield.unspecified = 0;
813 ++i.reg_operands;
814 }
815 else if (intel_state.base
816 || intel_state.index
817 || intel_state.seg
818 || intel_state.is_mem)
819 {
820 /* Memory operand. */
821 if ((int) i.mem_operands
822 >= 2 - !current_templates->start->opcode_modifier.isstring)
823 {
824 /* Handle
825
826 call 0x9090,0x90909090
827 lcall 0x9090,0x90909090
828 jmp 0x9090,0x90909090
829 ljmp 0x9090,0x90909090
830 */
831
832 if ((current_templates->start->opcode_modifier.jumpintersegment
833 || current_templates->start->opcode_modifier.jumpdword
834 || current_templates->start->opcode_modifier.jump)
835 && this_operand == 1
836 && intel_state.seg == NULL
837 && i.mem_operands == 1
838 && i.disp_operands == 1
839 && intel_state.op_modifier == O_absent)
840 {
841 /* Try to process the first operand as immediate, */
842 this_operand = 0;
843 if (i386_finalize_immediate (exp_seg, i.op[0].imms,
844 intel_state.reloc_types,
845 NULL))
846 {
847 this_operand = 1;
848 expP = &im_expressions[0];
849 i.op[this_operand].imms = expP;
850 *expP = exp;
851
852 /* Try to process the second operand as immediate, */
853 if (i386_finalize_immediate (exp_seg, expP,
854 intel_state.reloc_types,
855 NULL))
856 {
857 i.mem_operands = 0;
858 i.disp_operands = 0;
859 i.imm_operands = 2;
860 i.types[0].bitfield.mem = 0;
861 i.types[0].bitfield.disp16 = 0;
862 i.types[0].bitfield.disp32 = 0;
863 i.types[0].bitfield.disp32s = 0;
864 return 1;
865 }
866 }
867 }
868
869 as_bad (_("too many memory references for `%s'"),
870 current_templates->start->name);
871 return 0;
872 }
873
874 expP = &disp_expressions[i.disp_operands];
875 memcpy (expP, &exp, sizeof(exp));
876 resolve_expression (expP);
877
878 if (expP->X_op != O_constant
879 || expP->X_add_number
880 || (!intel_state.base
881 && !intel_state.index))
882 {
883 i.op[this_operand].disps = expP;
884 i.disp_operands++;
885
886 if (flag_code == CODE_64BIT)
887 {
888 i.types[this_operand].bitfield.disp32 = 1;
889 if (!i.prefix[ADDR_PREFIX])
890 {
891 i.types[this_operand].bitfield.disp64 = 1;
892 i.types[this_operand].bitfield.disp32s = 1;
893 }
894 }
895 else if (!i.prefix[ADDR_PREFIX] ^ (flag_code == CODE_16BIT))
896 i.types[this_operand].bitfield.disp32 = 1;
897 else
898 i.types[this_operand].bitfield.disp16 = 1;
899
900 #if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT)
901 /*
902 * exp_seg is used only for verification in
903 * i386_finalize_displacement, and we can end up seeing reg_section
904 * here - but we know we removed all registers from the expression
905 * (or error-ed on any remaining ones) in i386_intel_simplify. I
906 * consider the check in i386_finalize_displacement bogus anyway, in
907 * particular because it doesn't allow for expr_section, so I'd
908 * rather see that check (and the similar one in
909 * i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out
910 * expert I can't really say whether that would have other bad side
911 * effects.
912 */
913 if (OUTPUT_FLAVOR == bfd_target_aout_flavour
914 && exp_seg == reg_section)
915 exp_seg = expP->X_op != O_constant ? undefined_section
916 : absolute_section;
917 #endif
918
919 if (!i386_finalize_displacement (exp_seg, expP,
920 intel_state.reloc_types,
921 operand_string))
922 return 0;
923 }
924
925 if (intel_state.base || intel_state.index)
926 i.types[this_operand].bitfield.baseindex = 1;
927
928 if (intel_state.seg)
929 {
930 for (;;)
931 {
932 expP = symbol_get_value_expression (intel_state.seg);
933 if (expP->X_op != O_full_ptr)
934 break;
935 intel_state.seg = expP->X_add_symbol;
936 }
937 if (expP->X_op != O_register)
938 {
939 as_bad (_("segment register name expected"));
940 return 0;
941 }
942 if (!i386_regtab[expP->X_add_number].reg_type.bitfield.sreg2
943 && !i386_regtab[expP->X_add_number].reg_type.bitfield.sreg3)
944 {
945 as_bad (_("invalid use of register"));
946 return 0;
947 }
948 switch (i386_regtab[expP->X_add_number].reg_num)
949 {
950 case 0: i.seg[i.mem_operands] = &es; break;
951 case 1: i.seg[i.mem_operands] = &cs; break;
952 case 2: i.seg[i.mem_operands] = &ss; break;
953 case 3: i.seg[i.mem_operands] = &ds; break;
954 case 4: i.seg[i.mem_operands] = &fs; break;
955 case 5: i.seg[i.mem_operands] = &gs; break;
956 case RegFlat: i.seg[i.mem_operands] = NULL; break;
957 }
958 }
959
960 /* Swap base and index in 16-bit memory operands like
961 [si+bx]. Since i386_index_check is also used in AT&T
962 mode we have to do that here. */
963 if (intel_state.base
964 && intel_state.index
965 && intel_state.base->reg_type.bitfield.reg16
966 && intel_state.index->reg_type.bitfield.reg16
967 && intel_state.base->reg_num >= 6
968 && intel_state.index->reg_num < 6)
969 {
970 i.base_reg = intel_state.index;
971 i.index_reg = intel_state.base;
972 }
973 else
974 {
975 i.base_reg = intel_state.base;
976 i.index_reg = intel_state.index;
977 }
978
979 if (!i386_index_check (operand_string))
980 return 0;
981
982 i.types[this_operand].bitfield.mem = 1;
983 ++i.mem_operands;
984 }
985 else
986 {
987 /* Immediate. */
988 if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS)
989 {
990 as_bad (_("at most %d immediate operands are allowed"),
991 MAX_IMMEDIATE_OPERANDS);
992 return 0;
993 }
994
995 expP = &im_expressions[i.imm_operands++];
996 i.op[this_operand].imms = expP;
997 *expP = exp;
998
999 return i386_finalize_immediate (exp_seg, expP, intel_state.reloc_types,
1000 operand_string);
1001 }
1002
1003 return 1;
1004 }
1005