1 /* tc-i386.c -- Assemble Intel syntax code for ix86/x86-64
2 Copyright (C) 2009-2021 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
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)
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.
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
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 multiplication operand
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. */
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 /* mmword ptr X_add_symbol */
56 #define O_mmword_ptr O_qword_ptr
57 /* fword ptr X_add_symbol */
58 #define O_fword_ptr O_md24
59 /* tbyte ptr X_add_symbol */
60 #define O_tbyte_ptr O_md23
61 /* oword ptr X_add_symbol */
62 #define O_oword_ptr O_md22
63 /* xmmword ptr X_add_symbol */
64 #define O_xmmword_ptr O_oword_ptr
65 /* ymmword ptr X_add_symbol */
66 #define O_ymmword_ptr O_md21
67 /* zmmword ptr X_add_symbol */
68 #define O_zmmword_ptr O_md20
74 unsigned int operands
;
76 const i386_operators
[] =
78 { "and", O_bit_and
, 2 },
84 { "mod", O_modulus
, 2 },
86 { "not", O_bit_not
, 1 },
87 { "offset", O_offset
, 1 },
88 { "or", O_bit_inclusive_or
, 2 },
89 { "shl", O_left_shift
, 2 },
90 { "short", O_short
, 1 },
91 { "shr", O_right_shift
, 2 },
92 { "xor", O_bit_exclusive_or
, 2 },
93 { NULL
, O_illegal
, 0 }
100 unsigned short sz
[3];
104 #define I386_TYPE(t, n) { #t, O_##t##_ptr, { n, n, n } }
110 I386_TYPE(mmword
, 8),
111 I386_TYPE(tbyte
, 10),
112 I386_TYPE(oword
, 16),
113 I386_TYPE(xmmword
, 16),
114 I386_TYPE(ymmword
, 32),
115 I386_TYPE(zmmword
, 64),
117 { "near", O_near_ptr
, { 0xff04, 0xff02, 0xff08 } },
118 { "far", O_far_ptr
, { 0xff06, 0xff05, 0xff06 } },
119 { NULL
, O_illegal
, { 0, 0, 0 } }
122 operatorT
i386_operator (const char *name
, unsigned int operands
, char *pc
)
126 #ifdef SVR4_COMMENT_CHARS
127 if (!name
&& operands
== 2 && *input_line_pointer
== '\\')
128 switch (input_line_pointer
[1])
130 case '/': input_line_pointer
+= 2; return O_divide
;
131 case '%': input_line_pointer
+= 2; return O_modulus
;
132 case '*': input_line_pointer
+= 2; return O_multiply
;
143 switch (*input_line_pointer
)
146 ++input_line_pointer
;
149 ++input_line_pointer
;
152 if (this_operand
>= 0 && i
.reloc
[this_operand
] == NO_RELOC
)
155 char *gotfree_input_line
= lex_got (&i
.reloc
[this_operand
],
157 &intel_state
.reloc_types
);
159 if (!gotfree_input_line
)
161 free (gotfree_input_line
);
162 *input_line_pointer
++ = '+';
163 memset (input_line_pointer
, '0', adjust
- 1);
164 input_line_pointer
[adjust
- 1] = ' ';
172 for (j
= 0; i386_operators
[j
].name
; ++j
)
173 if (strcasecmp (i386_operators
[j
].name
, name
) == 0)
175 if (i386_operators
[j
].operands
176 && i386_operators
[j
].operands
!= operands
)
178 return i386_operators
[j
].op
;
181 for (j
= 0; i386_types
[j
].name
; ++j
)
182 if (strcasecmp (i386_types
[j
].name
, name
) == 0)
185 if (i386_types
[j
].name
&& *pc
== ' ')
190 ++input_line_pointer
;
191 c
= get_symbol_name (&pname
);
193 if (strcasecmp (pname
, "ptr") == 0)
195 /* FIXME: What if c == '"' ? */
198 if (intel_syntax
> 0 || operands
!= 1)
200 return i386_types
[j
].op
;
203 (void) restore_line_pointer (c
);
204 input_line_pointer
= pname
- 1;
210 static int i386_intel_parse_name (const char *name
, expressionS
*e
)
214 if (! strcmp (name
, "$"))
216 current_location (e
);
220 for (j
= 0; i386_types
[j
].name
; ++j
)
221 if (strcasecmp(i386_types
[j
].name
, name
) == 0)
223 e
->X_op
= O_constant
;
224 e
->X_add_number
= i386_types
[j
].sz
[flag_code
];
225 e
->X_add_symbol
= NULL
;
226 e
->X_op_symbol
= NULL
;
233 static INLINE
int i386_intel_check (const reg_entry
*rreg
,
234 const reg_entry
*base
,
235 const reg_entry
*iindex
)
237 if ((this_operand
>= 0
238 && rreg
!= i
.op
[this_operand
].regs
)
239 || base
!= intel_state
.base
240 || iindex
!= intel_state
.index
)
242 as_bad (_("invalid use of register"));
248 static INLINE
void i386_intel_fold (expressionS
*e
, symbolS
*sym
)
250 expressionS
*exp
= symbol_get_value_expression (sym
);
251 if (S_GET_SEGMENT (sym
) == absolute_section
)
253 offsetT val
= e
->X_add_number
;
256 e
->X_add_number
+= val
;
260 if (exp
->X_op
== O_symbol
261 && strcmp (S_GET_NAME (exp
->X_add_symbol
),
262 GLOBAL_OFFSET_TABLE_NAME
) == 0)
263 sym
= exp
->X_add_symbol
;
264 e
->X_add_symbol
= sym
;
265 e
->X_op_symbol
= NULL
;
271 i386_intel_simplify_register (expressionS
*e
)
275 if (this_operand
< 0 || intel_state
.in_offset
)
277 as_bad (_("invalid use of register"));
281 if (e
->X_op
== O_register
)
282 reg_num
= e
->X_add_number
;
284 reg_num
= e
->X_md
- 1;
286 if (reg_num
< 0 || reg_num
>= (int) i386_regtab_size
)
288 as_bad (_("invalid register number"));
292 if (!intel_state
.in_bracket
)
294 if (i
.op
[this_operand
].regs
)
296 as_bad (_("invalid use of register"));
299 if (i386_regtab
[reg_num
].reg_type
.bitfield
.class == SReg
300 && i386_regtab
[reg_num
].reg_num
== RegFlat
)
302 as_bad (_("invalid use of pseudo-register"));
305 i
.op
[this_operand
].regs
= i386_regtab
+ reg_num
;
307 else if (!intel_state
.index
308 && (i386_regtab
[reg_num
].reg_type
.bitfield
.xmmword
309 || i386_regtab
[reg_num
].reg_type
.bitfield
.ymmword
310 || i386_regtab
[reg_num
].reg_type
.bitfield
.zmmword
311 || i386_regtab
[reg_num
].reg_num
== RegIZ
))
312 intel_state
.index
= i386_regtab
+ reg_num
;
313 else if (!intel_state
.base
&& !intel_state
.in_scale
)
314 intel_state
.base
= i386_regtab
+ reg_num
;
315 else if (!intel_state
.index
)
317 const insn_template
*t
= current_templates
->start
;
319 if (intel_state
.in_scale
320 || (t
->opcode_modifier
.opcodeprefix
== PREFIX_0XF3
321 && t
->base_opcode
== 0x0f1b /* bndmk */)
322 || (t
->opcode_modifier
.opcodeprefix
== PREFIX_NONE
323 && (t
->base_opcode
& ~1) == 0x0f1a /* bnd{ld,st}x */)
324 || i386_regtab
[reg_num
].reg_type
.bitfield
.baseindex
)
325 intel_state
.index
= i386_regtab
+ reg_num
;
328 /* Convert base to index and make ESP/RSP the base. */
329 intel_state
.index
= intel_state
.base
;
330 intel_state
.base
= i386_regtab
+ reg_num
;
335 /* esp is invalid as index */
336 intel_state
.index
= i386_regtab
+ REGNAM_EAX
+ ESP_REG_NUM
;
341 static int i386_intel_simplify (expressionS
*);
343 static INLINE
int i386_intel_simplify_symbol(symbolS
*sym
)
345 int ret
= i386_intel_simplify (symbol_get_value_expression (sym
));
349 S_SET_SEGMENT(sym
, absolute_section
);
355 static int i386_intel_simplify (expressionS
*e
)
357 const reg_entry
*the_reg
= (this_operand
>= 0
358 ? i
.op
[this_operand
].regs
: NULL
);
359 const reg_entry
*base
= intel_state
.base
;
360 const reg_entry
*state_index
= intel_state
.index
;
371 if (!i386_intel_simplify_symbol (e
->X_add_symbol
)
372 || !i386_intel_check(the_reg
, intel_state
.base
,
376 if (!intel_state
.in_offset
)
377 ++intel_state
.in_bracket
;
378 ret
= i386_intel_simplify_symbol (e
->X_op_symbol
);
379 if (!intel_state
.in_offset
)
380 --intel_state
.in_bracket
;
386 i386_intel_fold (e
, e
->X_op_symbol
);
390 intel_state
.has_offset
= 1;
391 ++intel_state
.in_offset
;
392 ret
= i386_intel_simplify_symbol (e
->X_add_symbol
);
393 --intel_state
.in_offset
;
394 if (!ret
|| !i386_intel_check(the_reg
, base
, state_index
))
396 i386_intel_fold (e
, e
->X_add_symbol
);
403 case O_qword_ptr
: /* O_mmword_ptr */
405 case O_oword_ptr
: /* O_xmmword_ptr */
410 if (intel_state
.op_modifier
== O_absent
)
411 intel_state
.op_modifier
= e
->X_op
;
414 if (symbol_get_value_expression (e
->X_add_symbol
)->X_op
417 as_bad (_("invalid use of register"));
420 if (!i386_intel_simplify_symbol (e
->X_add_symbol
))
422 i386_intel_fold (e
, e
->X_add_symbol
);
426 if (symbol_get_value_expression (e
->X_op_symbol
)->X_op
429 as_bad (_("invalid use of register"));
432 if (!i386_intel_simplify_symbol (e
->X_op_symbol
)
433 || !i386_intel_check(the_reg
, intel_state
.base
,
436 if (!intel_state
.in_offset
)
438 if (!intel_state
.seg
)
439 intel_state
.seg
= e
->X_add_symbol
;
444 exp
.X_op
= O_full_ptr
;
445 exp
.X_add_symbol
= e
->X_add_symbol
;
446 exp
.X_op_symbol
= intel_state
.seg
;
447 intel_state
.seg
= make_expr_symbol (&exp
);
450 i386_intel_fold (e
, e
->X_op_symbol
);
454 if (this_operand
>= 0 && intel_state
.in_bracket
)
456 expressionS
*scale
= NULL
;
457 int has_index
= (intel_state
.index
!= NULL
);
459 if (!intel_state
.in_scale
++)
460 intel_state
.scale_factor
= 1;
462 ret
= i386_intel_simplify_symbol (e
->X_add_symbol
);
463 if (ret
&& !has_index
&& intel_state
.index
)
464 scale
= symbol_get_value_expression (e
->X_op_symbol
);
467 ret
= i386_intel_simplify_symbol (e
->X_op_symbol
);
468 if (ret
&& !scale
&& !has_index
&& intel_state
.index
)
469 scale
= symbol_get_value_expression (e
->X_add_symbol
);
473 resolve_expression (scale
);
474 if (scale
->X_op
!= O_constant
475 || intel_state
.index
->reg_type
.bitfield
.word
)
476 scale
->X_add_number
= 0;
477 intel_state
.scale_factor
*= scale
->X_add_number
;
480 --intel_state
.in_scale
;
484 if (!intel_state
.in_scale
)
485 switch (intel_state
.scale_factor
)
488 i
.log2_scale_factor
= 0;
491 i
.log2_scale_factor
= 1;
494 i
.log2_scale_factor
= 2;
497 i
.log2_scale_factor
= 3;
500 /* esp is invalid as index */
501 intel_state
.index
= i386_regtab
+ REGNAM_EAX
+ ESP_REG_NUM
;
510 ret
= i386_intel_simplify_register (e
);
513 gas_assert (e
->X_add_number
< (unsigned short) -1);
514 e
->X_md
= (unsigned short) e
->X_add_number
+ 1;
515 e
->X_op
= O_constant
;
522 return i386_intel_simplify_register (e
);
528 && !i386_intel_simplify_symbol (e
->X_add_symbol
))
530 if (e
->X_op
== O_add
|| e
->X_op
== O_subtract
)
532 base
= intel_state
.base
;
533 state_index
= intel_state
.index
;
535 if (!i386_intel_check (the_reg
, base
, state_index
)
537 && !i386_intel_simplify_symbol (e
->X_op_symbol
))
538 || !i386_intel_check (the_reg
,
540 ? base
: intel_state
.base
),
542 ? state_index
: intel_state
.index
)))
547 if (this_operand
>= 0
548 && e
->X_op
== O_symbol
549 && !intel_state
.in_offset
)
551 segT seg
= S_GET_SEGMENT (e
->X_add_symbol
);
553 if (seg
!= absolute_section
554 && seg
!= reg_section
555 && seg
!= expr_section
)
556 intel_state
.is_mem
|= 2 - !intel_state
.in_bracket
;
562 int i386_need_index_operator (void)
564 return intel_syntax
< 0;
568 i386_intel_operand (char *operand_string
, int got_a_float
)
570 char *saved_input_line_pointer
, *buf
;
572 expressionS exp
, *expP
;
576 /* Handle vector immediates. */
577 if (RC_SAE_immediate (operand_string
))
580 /* Initialize state structure. */
581 intel_state
.op_modifier
= O_absent
;
582 intel_state
.is_mem
= 0;
583 intel_state
.is_indirect
= 0;
584 intel_state
.has_offset
= 0;
585 intel_state
.base
= NULL
;
586 intel_state
.index
= NULL
;
587 intel_state
.seg
= NULL
;
588 operand_type_set (&intel_state
.reloc_types
, ~0);
589 gas_assert (!intel_state
.in_offset
);
590 gas_assert (!intel_state
.in_bracket
);
591 gas_assert (!intel_state
.in_scale
);
593 saved_input_line_pointer
= input_line_pointer
;
594 input_line_pointer
= buf
= xstrdup (operand_string
);
597 memset (&exp
, 0, sizeof(exp
));
598 exp_seg
= expression (&exp
);
599 ret
= i386_intel_simplify (&exp
);
604 /* Handle vector operations. */
605 if (*input_line_pointer
== '{')
607 char *end
= check_VecOperations (input_line_pointer
, NULL
);
609 input_line_pointer
= end
;
614 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
617 as_bad (_("junk `%s' after expression"), input_line_pointer
);
620 else if (exp
.X_op
== O_illegal
|| exp
.X_op
== O_absent
)
623 as_bad (_("invalid expression"));
626 else if (!intel_state
.has_offset
627 && input_line_pointer
> buf
628 && *(input_line_pointer
- 1) == ']')
630 intel_state
.is_mem
|= 1;
631 intel_state
.is_indirect
= 1;
634 input_line_pointer
= saved_input_line_pointer
;
637 gas_assert (!intel_state
.in_offset
);
638 gas_assert (!intel_state
.in_bracket
);
639 gas_assert (!intel_state
.in_scale
);
644 if (intel_state
.op_modifier
!= O_absent
645 && (current_templates
->start
->opcode_modifier
.opcodespace
!= SPACE_BASE
646 || current_templates
->start
->base_opcode
!= 0x8d /* lea */))
648 i
.types
[this_operand
].bitfield
.unspecified
= 0;
650 switch (intel_state
.op_modifier
)
653 i
.types
[this_operand
].bitfield
.byte
= 1;
654 suffix
= BYTE_MNEM_SUFFIX
;
658 i
.types
[this_operand
].bitfield
.word
= 1;
659 if (got_a_float
== 2) /* "fi..." */
660 suffix
= SHORT_MNEM_SUFFIX
;
662 suffix
= WORD_MNEM_SUFFIX
;
666 i
.types
[this_operand
].bitfield
.dword
= 1;
667 if ((current_templates
->start
->name
[0] == 'l'
668 && current_templates
->start
->name
[2] == 's'
669 && current_templates
->start
->name
[3] == 0)
670 || (current_templates
->start
->opcode_modifier
.opcodespace
== SPACE_BASE
671 && current_templates
->start
->base_opcode
== 0x62 /* bound */))
672 suffix
= WORD_MNEM_SUFFIX
;
673 else if (flag_code
!= CODE_32BIT
674 && (current_templates
->start
->opcode_modifier
.jump
== JUMP
675 || current_templates
->start
->opcode_modifier
.jump
677 suffix
= flag_code
== CODE_16BIT
? LONG_DOUBLE_MNEM_SUFFIX
679 else if (got_a_float
== 1) /* "f..." */
680 suffix
= SHORT_MNEM_SUFFIX
;
682 suffix
= LONG_MNEM_SUFFIX
;
686 i
.types
[this_operand
].bitfield
.fword
= 1;
687 if (current_templates
->start
->name
[0] == 'l'
688 && current_templates
->start
->name
[2] == 's'
689 && current_templates
->start
->name
[3] == 0)
690 suffix
= LONG_MNEM_SUFFIX
;
691 else if (!got_a_float
)
693 if (flag_code
== CODE_16BIT
)
694 add_prefix (DATA_PREFIX_OPCODE
);
695 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
699 case O_qword_ptr
: /* O_mmword_ptr */
700 i
.types
[this_operand
].bitfield
.qword
= 1;
701 if ((current_templates
->start
->opcode_modifier
.opcodespace
== SPACE_BASE
702 && current_templates
->start
->base_opcode
== 0x62 /* bound */)
703 || got_a_float
== 1) /* "f..." */
704 suffix
= LONG_MNEM_SUFFIX
;
706 suffix
= QWORD_MNEM_SUFFIX
;
710 i
.types
[this_operand
].bitfield
.tbyte
= 1;
711 if (got_a_float
== 1)
712 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
713 else if ((current_templates
->start
->operand_types
[0].bitfield
.fword
714 || current_templates
->start
->operand_types
[0].bitfield
.tbyte
715 || current_templates
->start
->opcode_modifier
.jump
== JUMP_DWORD
716 || current_templates
->start
->opcode_modifier
.jump
== JUMP
)
717 && flag_code
== CODE_64BIT
)
718 suffix
= QWORD_MNEM_SUFFIX
; /* l[fgs]s, [ls][gi]dt, call, jmp */
720 i
.types
[this_operand
].bitfield
.byte
= 1; /* cause an error */
723 case O_oword_ptr
: /* O_xmmword_ptr */
724 i
.types
[this_operand
].bitfield
.xmmword
= 1;
728 i
.types
[this_operand
].bitfield
.ymmword
= 1;
732 i
.types
[this_operand
].bitfield
.zmmword
= 1;
736 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
739 if (current_templates
->start
->opcode_modifier
.jump
!= JUMP
740 && current_templates
->start
->opcode_modifier
.jump
!= JUMP_DWORD
)
743 i
.types
[this_operand
].bitfield
.byte
= 1;
744 i
.types
[this_operand
].bitfield
.tbyte
= 1;
750 BAD_CASE (intel_state
.op_modifier
);
756 else if (i
.suffix
!= suffix
)
758 as_bad (_("conflicting operand size modifiers"));
763 /* Operands for jump/call need special consideration. */
764 if (current_templates
->start
->opcode_modifier
.jump
== JUMP
765 || current_templates
->start
->opcode_modifier
.jump
== JUMP_DWORD
766 || current_templates
->start
->opcode_modifier
.jump
== JUMP_INTERSEGMENT
)
768 bfd_boolean jumpabsolute
= FALSE
;
770 if (i
.op
[this_operand
].regs
773 || intel_state
.is_mem
> 1)
776 switch (intel_state
.op_modifier
)
782 intel_state
.is_mem
= 1;
786 if (!intel_state
.seg
)
788 intel_state
.is_mem
= 1;
789 if (intel_state
.op_modifier
== O_absent
)
791 if (intel_state
.is_indirect
== 1)
795 as_bad (_("cannot infer the segment part of the operand"));
798 else if (S_GET_SEGMENT (intel_state
.seg
) == reg_section
)
802 i386_operand_type types
;
804 if (i
.imm_operands
>= MAX_IMMEDIATE_OPERANDS
)
806 as_bad (_("at most %d immediate operands are allowed"),
807 MAX_IMMEDIATE_OPERANDS
);
810 expP
= &im_expressions
[i
.imm_operands
++];
811 memset (expP
, 0, sizeof(*expP
));
812 expP
->X_op
= O_symbol
;
813 expP
->X_add_symbol
= intel_state
.seg
;
814 i
.op
[this_operand
].imms
= expP
;
816 resolve_expression (expP
);
817 operand_type_set (&types
, ~0);
818 if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state
.seg
),
819 expP
, types
, operand_string
))
821 if (i
.operands
< MAX_OPERANDS
)
823 this_operand
= i
.operands
++;
824 i
.types
[this_operand
].bitfield
.unspecified
= 1;
826 if (suffix
== LONG_DOUBLE_MNEM_SUFFIX
)
828 intel_state
.seg
= NULL
;
829 intel_state
.is_mem
= 0;
838 i
.jumpabsolute
= TRUE
;
839 intel_state
.is_mem
|= 1;
842 else if (intel_state
.seg
)
843 intel_state
.is_mem
|= 1;
845 if (i
.op
[this_operand
].regs
)
847 i386_operand_type temp
;
849 /* Register operand. */
850 if (intel_state
.base
|| intel_state
.index
|| intel_state
.seg
)
852 as_bad (_("invalid operand"));
856 temp
= i
.op
[this_operand
].regs
->reg_type
;
857 temp
.bitfield
.baseindex
= 0;
858 i
.types
[this_operand
] = operand_type_or (i
.types
[this_operand
],
860 i
.types
[this_operand
].bitfield
.unspecified
= 0;
863 else if (intel_state
.base
866 || intel_state
.is_mem
)
868 /* Memory operand. */
869 if (i
.mem_operands
== 1 && !maybe_adjust_templates ())
871 if ((int) i
.mem_operands
872 >= 2 - !current_templates
->start
->opcode_modifier
.isstring
)
876 call 0x9090,0x90909090
877 lcall 0x9090,0x90909090
878 jmp 0x9090,0x90909090
879 ljmp 0x9090,0x90909090
882 if ((current_templates
->start
->opcode_modifier
.jump
== JUMP_INTERSEGMENT
883 || current_templates
->start
->opcode_modifier
.jump
== JUMP_DWORD
884 || current_templates
->start
->opcode_modifier
.jump
== JUMP
)
886 && intel_state
.seg
== NULL
887 && i
.mem_operands
== 1
888 && i
.disp_operands
== 1
889 && intel_state
.op_modifier
== O_absent
)
891 /* Try to process the first operand as immediate, */
893 if (i386_finalize_immediate (exp_seg
, i
.op
[0].imms
,
894 intel_state
.reloc_types
,
898 expP
= &im_expressions
[0];
899 i
.op
[this_operand
].imms
= expP
;
902 /* Try to process the second operand as immediate, */
903 if (i386_finalize_immediate (exp_seg
, expP
,
904 intel_state
.reloc_types
,
910 i
.flags
[0] &= ~Operand_Mem
;
911 i
.types
[0].bitfield
.disp16
= 0;
912 i
.types
[0].bitfield
.disp32
= 0;
913 i
.types
[0].bitfield
.disp32s
= 0;
919 as_bad (_("too many memory references for `%s'"),
920 current_templates
->start
->name
);
924 /* Swap base and index in 16-bit memory operands like
925 [si+bx]. Since i386_index_check is also used in AT&T
926 mode we have to do this here. */
929 && intel_state
.base
->reg_type
.bitfield
.word
930 && intel_state
.index
->reg_type
.bitfield
.word
931 && intel_state
.base
->reg_num
>= 6
932 && intel_state
.index
->reg_num
< 6)
934 i
.base_reg
= intel_state
.index
;
935 i
.index_reg
= intel_state
.base
;
939 i
.base_reg
= intel_state
.base
;
940 i
.index_reg
= intel_state
.index
;
943 if (i
.base_reg
|| i
.index_reg
)
944 i
.types
[this_operand
].bitfield
.baseindex
= 1;
946 expP
= &disp_expressions
[i
.disp_operands
];
947 memcpy (expP
, &exp
, sizeof(exp
));
948 resolve_expression (expP
);
950 if (expP
->X_op
!= O_constant
951 || expP
->X_add_number
952 || !i
.types
[this_operand
].bitfield
.baseindex
)
954 i
.op
[this_operand
].disps
= expP
;
957 i386_addressing_mode ();
959 if (flag_code
== CODE_64BIT
)
961 if (!i
.prefix
[ADDR_PREFIX
])
963 i
.types
[this_operand
].bitfield
.disp64
= 1;
964 i
.types
[this_operand
].bitfield
.disp32s
= 1;
967 i
.types
[this_operand
].bitfield
.disp32
= 1;
969 else if (!i
.prefix
[ADDR_PREFIX
] ^ (flag_code
== CODE_16BIT
))
970 i
.types
[this_operand
].bitfield
.disp32
= 1;
972 i
.types
[this_operand
].bitfield
.disp16
= 1;
974 #if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT)
976 * exp_seg is used only for verification in
977 * i386_finalize_displacement, and we can end up seeing reg_section
978 * here - but we know we removed all registers from the expression
979 * (or error-ed on any remaining ones) in i386_intel_simplify. I
980 * consider the check in i386_finalize_displacement bogus anyway, in
981 * particular because it doesn't allow for expr_section, so I'd
982 * rather see that check (and the similar one in
983 * i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out
984 * expert I can't really say whether that would have other bad side
987 if (OUTPUT_FLAVOR
== bfd_target_aout_flavour
988 && exp_seg
== reg_section
)
989 exp_seg
= expP
->X_op
!= O_constant
? undefined_section
993 if (!i386_finalize_displacement (exp_seg
, expP
,
994 intel_state
.reloc_types
,
1001 for (ret
= check_none
; ; ret
= operand_check
)
1003 expP
= symbol_get_value_expression (intel_state
.seg
);
1004 if (expP
->X_op
!= O_full_ptr
1005 || symbol_get_value_expression (expP
->X_op_symbol
)->X_op
1008 intel_state
.seg
= expP
->X_add_symbol
;
1010 if (expP
->X_op
!= O_register
)
1012 as_bad (_("segment register name expected"));
1015 if (i386_regtab
[expP
->X_add_number
].reg_type
.bitfield
.class != SReg
)
1017 as_bad (_("invalid use of register"));
1023 as_bad (_("redundant segment overrides"));
1026 as_warn (_("redundant segment overrides"));
1029 switch (i386_regtab
[expP
->X_add_number
].reg_num
)
1031 case 0: i
.seg
[i
.mem_operands
] = &es
; break;
1032 case 1: i
.seg
[i
.mem_operands
] = &cs
; break;
1033 case 2: i
.seg
[i
.mem_operands
] = &ss
; break;
1034 case 3: i
.seg
[i
.mem_operands
] = &ds
; break;
1035 case 4: i
.seg
[i
.mem_operands
] = &fs
; break;
1036 case 5: i
.seg
[i
.mem_operands
] = &gs
; break;
1037 case RegFlat
: i
.seg
[i
.mem_operands
] = NULL
; break;
1041 if (!i386_index_check (operand_string
))
1044 i
.flags
[this_operand
] |= Operand_Mem
;
1045 if (i
.mem_operands
== 0)
1046 i
.memop1_string
= xstrdup (operand_string
);
1052 if (i
.imm_operands
>= MAX_IMMEDIATE_OPERANDS
)
1054 as_bad (_("at most %d immediate operands are allowed"),
1055 MAX_IMMEDIATE_OPERANDS
);
1059 expP
= &im_expressions
[i
.imm_operands
++];
1060 i
.op
[this_operand
].imms
= expP
;
1063 return i386_finalize_immediate (exp_seg
, expP
, intel_state
.reloc_types
,