1 /* i386.c -- Assemble code for the Intel 80386
2 Copyright (C) 1989, 91, 92, 93, 94, 95, 96, 97, 98, 1999
3 Free Software Foundation.
5 This file is part of GAS, the GNU Assembler.
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 2, or (at your option)
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.
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, 59 Temple Place - Suite 330, Boston, MA
23 Intel 80386 machine specific gas.
24 Written by Eliot Dresselhaus (eliot@mgm.mit.edu).
25 Bugs & suggestions are completely welcome. This is free software.
26 Please help us make it better.
33 #include "opcode/i386.h"
36 #define TC_RELOC(X,Y) (Y)
39 #ifndef REGISTER_WARNINGS
40 #define REGISTER_WARNINGS 1
43 #ifndef SCALE1_WHEN_NO_INDEX
44 /* Specifying a scale factor besides 1 when there is no index is
45 futile. eg. `mov (%ebx,2),%al' does exactly the same as
46 `mov (%ebx),%al'. To slavishly follow what the programmer
47 specified, set SCALE1_WHEN_NO_INDEX to 0. */
48 #define SCALE1_WHEN_NO_INDEX 1
54 static unsigned int mode_from_disp_size
PARAMS ((unsigned int));
55 static int fits_in_signed_byte
PARAMS ((long));
56 static int fits_in_unsigned_byte
PARAMS ((long));
57 static int fits_in_unsigned_word
PARAMS ((long));
58 static int fits_in_signed_word
PARAMS ((long));
59 static int smallest_imm_type
PARAMS ((long));
60 static int add_prefix
PARAMS ((unsigned int));
61 static void set_16bit_code_flag
PARAMS ((int));
62 static void set_intel_syntax
PARAMS ((int));
65 static bfd_reloc_code_real_type reloc
66 PARAMS ((int, int, bfd_reloc_code_real_type
));
69 /* 'md_assemble ()' gathers together information and puts it into a
74 /* TM holds the template for the insn were currently assembling. */
77 /* SUFFIX holds the instruction mnemonic suffix if given.
78 (e.g. 'l' for 'movl') */
81 /* Operands are coded with OPERANDS, TYPES, DISPS, IMMS, and REGS. */
83 /* OPERANDS gives the number of given operands. */
84 unsigned int operands
;
86 /* REG_OPERANDS, DISP_OPERANDS, MEM_OPERANDS, IMM_OPERANDS give the number
87 of given register, displacement, memory operands and immediate
89 unsigned int reg_operands
, disp_operands
, mem_operands
, imm_operands
;
91 /* TYPES [i] is the type (see above #defines) which tells us how to
92 search through DISPS [i] & IMMS [i] & REGS [i] for the required
94 unsigned int types
[MAX_OPERANDS
];
96 /* Displacements (if given) for each operand. */
97 expressionS
*disps
[MAX_OPERANDS
];
99 /* Relocation type for operand */
101 enum bfd_reloc_code_real disp_reloc
[MAX_OPERANDS
];
103 int disp_reloc
[MAX_OPERANDS
];
106 /* Immediate operands (if given) for each operand. */
107 expressionS
*imms
[MAX_OPERANDS
];
109 /* Register operands (if given) for each operand. */
110 const reg_entry
*regs
[MAX_OPERANDS
];
112 /* BASE_REG, INDEX_REG, and LOG2_SCALE_FACTOR are used to encode
113 the base index byte below. */
114 const reg_entry
*base_reg
;
115 const reg_entry
*index_reg
;
116 unsigned int log2_scale_factor
;
118 /* SEG gives the seg_entries of this insn. They are zero unless
119 explicit segment overrides are given. */
120 const seg_entry
*seg
[2]; /* segments for memory operands (if given) */
122 /* PREFIX holds all the given prefix opcodes (usually null).
123 PREFIXES is the number of prefix opcodes. */
124 unsigned int prefixes
;
125 unsigned char prefix
[MAX_PREFIXES
];
127 /* RM and SIB are the modrm byte and the sib byte where the
128 addressing modes of this insn are encoded. */
134 typedef struct _i386_insn i386_insn
;
136 /* List of chars besides those in app.c:symbol_chars that can start an
137 operand. Used to prevent the scrubber eating vital white-space. */
139 const char extra_symbol_chars
[] = "*%-(@";
141 const char extra_symbol_chars
[] = "*%-(";
144 /* This array holds the chars that always start a comment. If the
145 pre-processor is disabled, these aren't very useful */
146 #if defined (TE_I386AIX) || ((defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && ! defined (TE_LINUX))
147 /* Putting '/' here makes it impossible to use the divide operator.
148 However, we need it for compatibility with SVR4 systems. */
149 const char comment_chars
[] = "#/";
150 #define PREFIX_SEPARATOR '\\'
152 const char comment_chars
[] = "#";
153 #define PREFIX_SEPARATOR '/'
156 /* This array holds the chars that only start a comment at the beginning of
157 a line. If the line seems to have the form '# 123 filename'
158 .line and .file directives will appear in the pre-processed output */
159 /* Note that input_file.c hand checks for '#' at the beginning of the
160 first line of the input file. This is because the compiler outputs
161 #NO_APP at the beginning of its output. */
162 /* Also note that comments started like this one will always work if
163 '/' isn't otherwise defined. */
164 #if defined (TE_I386AIX) || ((defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && ! defined (TE_LINUX))
165 const char line_comment_chars
[] = "";
167 const char line_comment_chars
[] = "/";
170 const char line_separator_chars
[] = "";
172 /* Chars that can be used to separate mant from exp in floating point nums */
173 const char EXP_CHARS
[] = "eE";
175 /* Chars that mean this number is a floating point constant */
178 const char FLT_CHARS
[] = "fFdDxX";
180 /* tables for lexical analysis */
181 static char mnemonic_chars
[256];
182 static char register_chars
[256];
183 static char operand_chars
[256];
184 static char identifier_chars
[256];
185 static char digit_chars
[256];
188 #define is_mnemonic_char(x) (mnemonic_chars[(unsigned char) x])
189 #define is_operand_char(x) (operand_chars[(unsigned char) x])
190 #define is_register_char(x) (register_chars[(unsigned char) x])
191 #define is_space_char(x) ((x) == ' ')
192 #define is_identifier_char(x) (identifier_chars[(unsigned char) x])
193 #define is_digit_char(x) (digit_chars[(unsigned char) x])
195 /* put here all non-digit non-letter charcters that may occur in an operand */
196 static char operand_special_chars
[] = "%$-+(,)*._~/<>|&^!:[@]";
198 /* md_assemble() always leaves the strings it's passed unaltered. To
199 effect this we maintain a stack of saved characters that we've smashed
200 with '\0's (indicating end of strings for various sub-fields of the
201 assembler instruction). */
202 static char save_stack
[32];
203 static char *save_stack_p
; /* stack pointer */
204 #define END_STRING_AND_SAVE(s) \
205 do { *save_stack_p++ = *(s); *(s) = '\0'; } while (0)
206 #define RESTORE_END_STRING(s) \
207 do { *(s) = *--save_stack_p; } while (0)
209 /* The instruction we're assembling. */
212 /* Possible templates for current insn. */
213 static const templates
*current_templates
;
215 /* Per instruction expressionS buffers: 2 displacements & 2 immediate max. */
216 static expressionS disp_expressions
[2], im_expressions
[2];
218 static int this_operand
; /* current operand we are working on */
220 static int flag_do_long_jump
; /* FIXME what does this do? */
222 static int flag_16bit_code
; /* 1 if we're writing 16-bit code, 0 if 32-bit */
224 static int intel_syntax
= 0; /* 1 for intel syntax, 0 if att syntax */
226 static int allow_naked_reg
= 0; /* 1 if register prefix % not required */
228 /* Interface to relax_segment.
229 There are 2 relax states for 386 jump insns: one for conditional &
230 one for unconditional jumps. This is because the these two types
231 of jumps add different sizes to frags when we're figuring out what
232 sort of jump to choose to reach a given label. */
235 #define COND_JUMP 1 /* conditional jump */
236 #define UNCOND_JUMP 2 /* unconditional jump */
240 #define SMALL16 (SMALL|CODE16)
242 #define BIG16 (BIG|CODE16)
246 #define INLINE __inline__
252 #define ENCODE_RELAX_STATE(type,size) \
253 ((relax_substateT)((type<<2) | (size)))
254 #define SIZE_FROM_RELAX_STATE(s) \
255 ( (((s) & 0x3) == BIG ? 4 : (((s) & 0x3) == BIG16 ? 2 : 1)) )
257 /* This table is used by relax_frag to promote short jumps to long
258 ones where necessary. SMALL (short) jumps may be promoted to BIG
259 (32 bit long) ones, and SMALL16 jumps to BIG16 (16 bit long). We
260 don't allow a short jump in a 32 bit code segment to be promoted to
261 a 16 bit offset jump because it's slower (requires data size
262 prefix), and doesn't work, unless the destination is in the bottom
263 64k of the code segment (The top 16 bits of eip are zeroed). */
265 const relax_typeS md_relax_table
[] =
268 1) most positive reach of this state,
269 2) most negative reach of this state,
270 3) how many bytes this mode will add to the size of the current frag
271 4) which index into the table to try if we can't fit into this one.
278 {127 + 1, -128 + 1, 0, ENCODE_RELAX_STATE (COND_JUMP
, BIG
)},
279 {127 + 1, -128 + 1, 0, ENCODE_RELAX_STATE (COND_JUMP
, BIG16
)},
280 /* dword conditionals adds 4 bytes to frag:
281 1 extra opcode byte, 3 extra displacement bytes. */
283 /* word conditionals add 2 bytes to frag:
284 1 extra opcode byte, 1 extra displacement byte. */
287 {127 + 1, -128 + 1, 0, ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG
)},
288 {127 + 1, -128 + 1, 0, ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG16
)},
289 /* dword jmp adds 3 bytes to frag:
290 0 extra opcode bytes, 3 extra displacement bytes. */
292 /* word jmp adds 1 byte to frag:
293 0 extra opcode bytes, 1 extra displacement byte. */
300 i386_align_code (fragP
, count
)
304 /* Various efficient no-op patterns for aligning code labels. */
305 /* Note: Don't try to assemble the instructions in the comments. */
306 /* 0L and 0w are not legal */
307 static const char f32_1
[] =
309 static const char f32_2
[] =
310 {0x89,0xf6}; /* movl %esi,%esi */
311 static const char f32_3
[] =
312 {0x8d,0x76,0x00}; /* leal 0(%esi),%esi */
313 static const char f32_4
[] =
314 {0x8d,0x74,0x26,0x00}; /* leal 0(%esi,1),%esi */
315 static const char f32_5
[] =
317 0x8d,0x74,0x26,0x00}; /* leal 0(%esi,1),%esi */
318 static const char f32_6
[] =
319 {0x8d,0xb6,0x00,0x00,0x00,0x00}; /* leal 0L(%esi),%esi */
320 static const char f32_7
[] =
321 {0x8d,0xb4,0x26,0x00,0x00,0x00,0x00}; /* leal 0L(%esi,1),%esi */
322 static const char f32_8
[] =
324 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00}; /* leal 0L(%esi,1),%esi */
325 static const char f32_9
[] =
326 {0x89,0xf6, /* movl %esi,%esi */
327 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
328 static const char f32_10
[] =
329 {0x8d,0x76,0x00, /* leal 0(%esi),%esi */
330 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
331 static const char f32_11
[] =
332 {0x8d,0x74,0x26,0x00, /* leal 0(%esi,1),%esi */
333 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
334 static const char f32_12
[] =
335 {0x8d,0xb6,0x00,0x00,0x00,0x00, /* leal 0L(%esi),%esi */
336 0x8d,0xbf,0x00,0x00,0x00,0x00}; /* leal 0L(%edi),%edi */
337 static const char f32_13
[] =
338 {0x8d,0xb6,0x00,0x00,0x00,0x00, /* leal 0L(%esi),%esi */
339 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
340 static const char f32_14
[] =
341 {0x8d,0xb4,0x26,0x00,0x00,0x00,0x00, /* leal 0L(%esi,1),%esi */
342 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
343 static const char f32_15
[] =
344 {0xeb,0x0d,0x90,0x90,0x90,0x90,0x90, /* jmp .+15; lotsa nops */
345 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90};
346 static const char f16_4
[] =
347 {0x8d,0xb4,0x00,0x00}; /* lea 0w(%si),%si */
348 static const char f16_5
[] =
350 0x8d,0xb4,0x00,0x00}; /* lea 0w(%si),%si */
351 static const char f16_6
[] =
352 {0x89,0xf6, /* mov %si,%si */
353 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
354 static const char f16_7
[] =
355 {0x8d,0x74,0x00, /* lea 0(%si),%si */
356 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
357 static const char f16_8
[] =
358 {0x8d,0xb4,0x00,0x00, /* lea 0w(%si),%si */
359 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
360 static const char *const f32_patt
[] = {
361 f32_1
, f32_2
, f32_3
, f32_4
, f32_5
, f32_6
, f32_7
, f32_8
,
362 f32_9
, f32_10
, f32_11
, f32_12
, f32_13
, f32_14
, f32_15
364 static const char *const f16_patt
[] = {
365 f32_1
, f32_2
, f32_3
, f16_4
, f16_5
, f16_6
, f16_7
, f16_8
,
366 f32_15
, f32_15
, f32_15
, f32_15
, f32_15
, f32_15
, f32_15
369 if (count
> 0 && count
<= 15)
373 memcpy(fragP
->fr_literal
+ fragP
->fr_fix
,
374 f16_patt
[count
- 1], count
);
375 if (count
> 8) /* adjust jump offset */
376 fragP
->fr_literal
[fragP
->fr_fix
+ 1] = count
- 2;
379 memcpy(fragP
->fr_literal
+ fragP
->fr_fix
,
380 f32_patt
[count
- 1], count
);
381 fragP
->fr_var
= count
;
385 static char *output_invalid
PARAMS ((int c
));
386 static int i386_operand
PARAMS ((char *operand_string
));
387 static int i386_intel_operand
PARAMS ((char *operand_string
, int got_a_float
));
388 static const reg_entry
*parse_register
PARAMS ((char *reg_string
,
392 static void s_bss
PARAMS ((int));
395 symbolS
*GOT_symbol
; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */
397 static INLINE
unsigned int
398 mode_from_disp_size (t
)
401 return (t
& Disp8
) ? 1 : (t
& (Disp16
|Disp32
)) ? 2 : 0;
405 fits_in_signed_byte (num
)
408 return (num
>= -128) && (num
<= 127);
409 } /* fits_in_signed_byte() */
412 fits_in_unsigned_byte (num
)
415 return (num
& 0xff) == num
;
416 } /* fits_in_unsigned_byte() */
419 fits_in_unsigned_word (num
)
422 return (num
& 0xffff) == num
;
423 } /* fits_in_unsigned_word() */
426 fits_in_signed_word (num
)
429 return (-32768 <= num
) && (num
<= 32767);
430 } /* fits_in_signed_word() */
433 smallest_imm_type (num
)
437 /* This code is disabled because all the Imm1 forms in the opcode table
438 are slower on the i486, and they're the versions with the implicitly
439 specified single-position displacement, which has another syntax if
440 you really want to use that form. If you really prefer to have the
441 one-byte-shorter Imm1 form despite these problems, re-enable this
444 return Imm1
| Imm8
| Imm8S
| Imm16
| Imm32
;
446 return (fits_in_signed_byte (num
)
447 ? (Imm8S
| Imm8
| Imm16
| Imm32
)
448 : fits_in_unsigned_byte (num
)
449 ? (Imm8
| Imm16
| Imm32
)
450 : (fits_in_signed_word (num
) || fits_in_unsigned_word (num
))
453 } /* smallest_imm_type() */
455 /* Returns 0 if attempting to add a prefix where one from the same
456 class already exists, 1 if non rep/repne added, 2 if rep/repne
470 case CS_PREFIX_OPCODE
:
471 case DS_PREFIX_OPCODE
:
472 case ES_PREFIX_OPCODE
:
473 case FS_PREFIX_OPCODE
:
474 case GS_PREFIX_OPCODE
:
475 case SS_PREFIX_OPCODE
:
479 case REPNE_PREFIX_OPCODE
:
480 case REPE_PREFIX_OPCODE
:
483 case LOCK_PREFIX_OPCODE
:
491 case ADDR_PREFIX_OPCODE
:
495 case DATA_PREFIX_OPCODE
:
502 as_bad (_("same type of prefix used twice"));
507 i
.prefix
[q
] = prefix
;
512 set_16bit_code_flag (new_16bit_code_flag
)
513 int new_16bit_code_flag
;
515 flag_16bit_code
= new_16bit_code_flag
;
519 set_intel_syntax (syntax_flag
)
522 /* Find out if register prefixing is specified. */
523 int ask_naked_reg
= 0;
526 if (! is_end_of_line
[(unsigned char) *input_line_pointer
])
528 char *string
= input_line_pointer
;
529 int e
= get_symbol_end ();
531 if (strcmp(string
, "prefix") == 0)
533 else if (strcmp(string
, "noprefix") == 0)
536 as_bad (_("Bad argument to syntax directive."));
537 *input_line_pointer
= e
;
539 demand_empty_rest_of_line ();
541 intel_syntax
= syntax_flag
;
543 if (ask_naked_reg
== 0)
546 allow_naked_reg
= (intel_syntax
547 && (bfd_get_symbol_leading_char (stdoutput
) != '\0'));
549 allow_naked_reg
= 0; /* conservative default */
553 allow_naked_reg
= (ask_naked_reg
< 0);
556 const pseudo_typeS md_pseudo_table
[] =
561 #if !defined(OBJ_AOUT) && !defined(USE_ALIGN_PTWO)
562 {"align", s_align_bytes
, 0},
564 {"align", s_align_ptwo
, 0},
566 {"ffloat", float_cons
, 'f'},
567 {"dfloat", float_cons
, 'd'},
568 {"tfloat", float_cons
, 'x'},
570 {"noopt", s_ignore
, 0},
571 {"optim", s_ignore
, 0},
572 {"code16", set_16bit_code_flag
, 1},
573 {"code32", set_16bit_code_flag
, 0},
574 {"intel_syntax", set_intel_syntax
, 1},
575 {"att_syntax", set_intel_syntax
, 0},
579 /* for interface with expression () */
580 extern char *input_line_pointer
;
582 /* hash table for instruction mnemonic lookup */
583 static struct hash_control
*op_hash
;
584 /* hash table for register lookup */
585 static struct hash_control
*reg_hash
;
591 const char *hash_err
;
593 /* initialize op_hash hash table */
594 op_hash
= hash_new ();
597 register const template *optab
;
598 register templates
*core_optab
;
600 optab
= i386_optab
; /* setup for loop */
601 core_optab
= (templates
*) xmalloc (sizeof (templates
));
602 core_optab
->start
= optab
;
607 if (optab
->name
== NULL
608 || strcmp (optab
->name
, (optab
- 1)->name
) != 0)
610 /* different name --> ship out current template list;
611 add to hash table; & begin anew */
612 core_optab
->end
= optab
;
613 hash_err
= hash_insert (op_hash
,
619 as_fatal (_("Internal Error: Can't hash %s: %s"),
623 if (optab
->name
== NULL
)
625 core_optab
= (templates
*) xmalloc (sizeof (templates
));
626 core_optab
->start
= optab
;
631 /* initialize reg_hash hash table */
632 reg_hash
= hash_new ();
634 register const reg_entry
*regtab
;
636 for (regtab
= i386_regtab
;
637 regtab
< i386_regtab
+ sizeof (i386_regtab
) / sizeof (i386_regtab
[0]);
640 hash_err
= hash_insert (reg_hash
, regtab
->reg_name
, (PTR
) regtab
);
646 /* fill in lexical tables: mnemonic_chars, operand_chars. */
651 for (c
= 0; c
< 256; c
++)
656 mnemonic_chars
[c
] = c
;
657 register_chars
[c
] = c
;
658 operand_chars
[c
] = c
;
660 else if (islower (c
))
662 mnemonic_chars
[c
] = c
;
663 register_chars
[c
] = c
;
664 operand_chars
[c
] = c
;
666 else if (isupper (c
))
668 mnemonic_chars
[c
] = tolower (c
);
669 register_chars
[c
] = mnemonic_chars
[c
];
670 operand_chars
[c
] = c
;
673 if (isalpha (c
) || isdigit (c
))
674 identifier_chars
[c
] = c
;
677 identifier_chars
[c
] = c
;
678 operand_chars
[c
] = c
;
683 identifier_chars
['@'] = '@';
685 register_chars
[')'] = ')';
686 register_chars
['('] = '(';
687 digit_chars
['-'] = '-';
688 identifier_chars
['_'] = '_';
689 identifier_chars
['.'] = '.';
691 for (p
= operand_special_chars
; *p
!= '\0'; p
++)
692 operand_chars
[(unsigned char) *p
] = *p
;
695 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
696 if (OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
698 record_alignment (text_section
, 2);
699 record_alignment (data_section
, 2);
700 record_alignment (bss_section
, 2);
706 i386_print_statistics (file
)
709 hash_print_statistics (file
, "i386 opcode", op_hash
);
710 hash_print_statistics (file
, "i386 register", reg_hash
);
716 /* debugging routines for md_assemble */
717 static void pi
PARAMS ((char *, i386_insn
*));
718 static void pte
PARAMS ((template *));
719 static void pt
PARAMS ((unsigned int));
720 static void pe
PARAMS ((expressionS
*));
721 static void ps
PARAMS ((symbolS
*));
728 register template *p
;
731 fprintf (stdout
, "%s: template ", line
);
733 fprintf (stdout
, " modrm: mode %x reg %x reg/mem %x",
734 x
->rm
.mode
, x
->rm
.reg
, x
->rm
.regmem
);
735 fprintf (stdout
, " base %x index %x scale %x\n",
736 x
->bi
.base
, x
->bi
.index
, x
->bi
.scale
);
737 for (i
= 0; i
< x
->operands
; i
++)
739 fprintf (stdout
, " #%d: ", i
+ 1);
741 fprintf (stdout
, "\n");
743 & (Reg
| SReg2
| SReg3
| Control
| Debug
| Test
| RegMMX
| RegXMM
))
744 fprintf (stdout
, "%s\n", x
->regs
[i
]->reg_name
);
745 if (x
->types
[i
] & Imm
)
747 if (x
->types
[i
] & Disp
)
757 fprintf (stdout
, " %d operands ", t
->operands
);
758 fprintf (stdout
, "opcode %x ",
760 if (t
->extension_opcode
!= None
)
761 fprintf (stdout
, "ext %x ", t
->extension_opcode
);
762 if (t
->opcode_modifier
& D
)
763 fprintf (stdout
, "D");
764 if (t
->opcode_modifier
& W
)
765 fprintf (stdout
, "W");
766 fprintf (stdout
, "\n");
767 for (i
= 0; i
< t
->operands
; i
++)
769 fprintf (stdout
, " #%d type ", i
+ 1);
770 pt (t
->operand_types
[i
]);
771 fprintf (stdout
, "\n");
779 fprintf (stdout
, " operation %d\n", e
->X_op
);
780 fprintf (stdout
, " add_number %d (%x)\n",
781 e
->X_add_number
, e
->X_add_number
);
784 fprintf (stdout
, " add_symbol ");
785 ps (e
->X_add_symbol
);
786 fprintf (stdout
, "\n");
790 fprintf (stdout
, " op_symbol ");
792 fprintf (stdout
, "\n");
800 fprintf (stdout
, "%s type %s%s",
802 S_IS_EXTERNAL (s
) ? "EXTERNAL " : "",
803 segment_name (S_GET_SEGMENT (s
)));
822 { BaseIndex
, "BaseIndex" },
826 { InOutPortReg
, "InOutPortReg" },
827 { ShiftCount
, "ShiftCount" },
828 { Control
, "control reg" },
829 { Test
, "test reg" },
830 { Debug
, "debug reg" },
831 { FloatReg
, "FReg" },
832 { FloatAcc
, "FAcc" },
836 { JumpAbsolute
, "Jump Absolute" },
847 register struct type_name
*ty
;
851 fprintf (stdout
, _("Unknown"));
855 for (ty
= type_names
; ty
->mask
; ty
++)
857 fprintf (stdout
, "%s, ", ty
->tname
);
862 #endif /* DEBUG386 */
865 tc_i386_force_relocation (fixp
)
869 if (fixp
->fx_r_type
== BFD_RELOC_VTABLE_INHERIT
870 || fixp
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)
875 return fixp
->fx_r_type
==7;
880 static bfd_reloc_code_real_type reloc
881 PARAMS ((int, int, bfd_reloc_code_real_type
));
883 static bfd_reloc_code_real_type
884 reloc (size
, pcrel
, other
)
887 bfd_reloc_code_real_type other
;
889 if (other
!= NO_RELOC
) return other
;
895 case 1: return BFD_RELOC_8_PCREL
;
896 case 2: return BFD_RELOC_16_PCREL
;
897 case 4: return BFD_RELOC_32_PCREL
;
899 as_bad (_("Can not do %d byte pc-relative relocation"), size
);
905 case 1: return BFD_RELOC_8
;
906 case 2: return BFD_RELOC_16
;
907 case 4: return BFD_RELOC_32
;
909 as_bad (_("Can not do %d byte relocation"), size
);
912 return BFD_RELOC_NONE
;
916 * Here we decide which fixups can be adjusted to make them relative to
917 * the beginning of the section instead of the symbol. Basically we need
918 * to make sure that the dynamic relocations are done correctly, so in
919 * some cases we force the original symbol to be used.
922 tc_i386_fix_adjustable(fixP
)
926 /* Prevent all adjustments to global symbols. */
927 if (S_IS_EXTERN (fixP
->fx_addsy
))
929 if (S_IS_WEAK (fixP
->fx_addsy
))
932 /* adjust_reloc_syms doesn't know about the GOT */
933 if (fixP
->fx_r_type
== BFD_RELOC_386_GOTOFF
934 || fixP
->fx_r_type
== BFD_RELOC_386_PLT32
935 || fixP
->fx_r_type
== BFD_RELOC_386_GOT32
936 || fixP
->fx_r_type
== BFD_RELOC_VTABLE_INHERIT
937 || fixP
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)
942 #define reloc(SIZE,PCREL,OTHER) 0
943 #define BFD_RELOC_16 0
944 #define BFD_RELOC_32 0
945 #define BFD_RELOC_16_PCREL 0
946 #define BFD_RELOC_32_PCREL 0
947 #define BFD_RELOC_386_PLT32 0
948 #define BFD_RELOC_386_GOT32 0
949 #define BFD_RELOC_386_GOTOFF 0
953 intel_float_operand (mnemonic
)
956 if (mnemonic
[0] == 'f' && mnemonic
[1] =='i')
959 if (mnemonic
[0] == 'f')
965 /* This is the guts of the machine-dependent assembler. LINE points to a
966 machine dependent instruction. This function is supposed to emit
967 the frags/bytes it assembles to. */
973 /* Points to template once we've found it. */
976 /* Count the size of the instruction generated. */
981 char mnemonic
[MAX_MNEM_SIZE
];
983 /* Initialize globals. */
984 memset (&i
, '\0', sizeof (i
));
985 for (j
= 0; j
< MAX_OPERANDS
; j
++)
986 i
.disp_reloc
[j
] = NO_RELOC
;
987 memset (disp_expressions
, '\0', sizeof (disp_expressions
));
988 memset (im_expressions
, '\0', sizeof (im_expressions
));
989 save_stack_p
= save_stack
; /* reset stack pointer */
991 /* First parse an instruction mnemonic & call i386_operand for the operands.
992 We assume that the scrubber has arranged it so that line[0] is the valid
993 start of a (possibly prefixed) mnemonic. */
996 char *token_start
= l
;
999 /* Non-zero if we found a prefix only acceptable with string insns. */
1000 const char *expecting_string_instruction
= NULL
;
1005 while ((*mnem_p
= mnemonic_chars
[(unsigned char) *l
]) != 0)
1008 if (mnem_p
>= mnemonic
+ sizeof (mnemonic
))
1010 as_bad (_("no such 386 instruction: `%s'"), token_start
);
1015 if (!is_space_char (*l
)
1016 && *l
!= END_OF_INSN
1017 && *l
!= PREFIX_SEPARATOR
)
1019 as_bad (_("invalid character %s in mnemonic"),
1020 output_invalid (*l
));
1023 if (token_start
== l
)
1025 if (*l
== PREFIX_SEPARATOR
)
1026 as_bad (_("expecting prefix; got nothing"));
1028 as_bad (_("expecting mnemonic; got nothing"));
1032 /* Look up instruction (or prefix) via hash table. */
1033 current_templates
= hash_find (op_hash
, mnemonic
);
1035 if (*l
!= END_OF_INSN
1036 && (! is_space_char (*l
) || l
[1] != END_OF_INSN
)
1037 && current_templates
1038 && (current_templates
->start
->opcode_modifier
& IsPrefix
))
1040 /* If we are in 16-bit mode, do not allow addr16 or data16.
1041 Similarly, in 32-bit mode, do not allow addr32 or data32. */
1042 if ((current_templates
->start
->opcode_modifier
& (Size16
| Size32
))
1043 && (((current_templates
->start
->opcode_modifier
& Size32
) != 0)
1046 as_bad (_("redundant %s prefix"),
1047 current_templates
->start
->name
);
1050 /* Add prefix, checking for repeated prefixes. */
1051 switch (add_prefix (current_templates
->start
->base_opcode
))
1056 expecting_string_instruction
=
1057 current_templates
->start
->name
;
1060 /* Skip past PREFIX_SEPARATOR and reset token_start. */
1067 if (!current_templates
)
1069 /* See if we can get a match by trimming off a suffix. */
1072 case DWORD_MNEM_SUFFIX
:
1073 case WORD_MNEM_SUFFIX
:
1074 case BYTE_MNEM_SUFFIX
:
1075 case SHORT_MNEM_SUFFIX
:
1076 #if LONG_MNEM_SUFFIX != DWORD_MNEM_SUFFIX
1077 case LONG_MNEM_SUFFIX
:
1079 i
.suffix
= mnem_p
[-1];
1081 current_templates
= hash_find (op_hash
, mnemonic
);
1085 case INTEL_DWORD_MNEM_SUFFIX
:
1088 i
.suffix
= mnem_p
[-1];
1090 current_templates
= hash_find (op_hash
, mnemonic
);
1094 if (!current_templates
)
1096 as_bad (_("no such 386 instruction: `%s'"), token_start
);
1101 /* check for rep/repne without a string instruction */
1102 if (expecting_string_instruction
1103 && !(current_templates
->start
->opcode_modifier
& IsString
))
1105 as_bad (_("expecting string instruction after `%s'"),
1106 expecting_string_instruction
);
1110 /* There may be operands to parse. */
1111 if (*l
!= END_OF_INSN
)
1113 /* parse operands */
1115 /* 1 if operand is pending after ','. */
1116 unsigned int expecting_operand
= 0;
1118 /* Non-zero if operand parens not balanced. */
1119 unsigned int paren_not_balanced
;
1123 /* skip optional white space before operand */
1124 if (is_space_char (*l
))
1126 if (!is_operand_char (*l
) && *l
!= END_OF_INSN
)
1128 as_bad (_("invalid character %s before operand %d"),
1129 output_invalid (*l
),
1133 token_start
= l
; /* after white space */
1134 paren_not_balanced
= 0;
1135 while (paren_not_balanced
|| *l
!= ',')
1137 if (*l
== END_OF_INSN
)
1139 if (paren_not_balanced
)
1142 as_bad (_("unbalanced parenthesis in operand %d."),
1145 as_bad (_("unbalanced brackets in operand %d."),
1150 break; /* we are done */
1152 else if (!is_operand_char (*l
) && !is_space_char (*l
))
1154 as_bad (_("invalid character %s in operand %d"),
1155 output_invalid (*l
),
1162 ++paren_not_balanced
;
1164 --paren_not_balanced
;
1169 ++paren_not_balanced
;
1171 --paren_not_balanced
;
1175 if (l
!= token_start
)
1176 { /* yes, we've read in another operand */
1177 unsigned int operand_ok
;
1178 this_operand
= i
.operands
++;
1179 if (i
.operands
> MAX_OPERANDS
)
1181 as_bad (_("spurious operands; (%d operands/instruction max)"),
1185 /* now parse operand adding info to 'i' as we go along */
1186 END_STRING_AND_SAVE (l
);
1189 operand_ok
= i386_intel_operand (token_start
, intel_float_operand (mnemonic
));
1191 operand_ok
= i386_operand (token_start
);
1193 RESTORE_END_STRING (l
); /* restore old contents */
1199 if (expecting_operand
)
1201 expecting_operand_after_comma
:
1202 as_bad (_("expecting operand after ','; got nothing"));
1207 as_bad (_("expecting operand before ','; got nothing"));
1212 /* now *l must be either ',' or END_OF_INSN */
1215 if (*++l
== END_OF_INSN
)
1216 { /* just skip it, if it's \n complain */
1217 goto expecting_operand_after_comma
;
1219 expecting_operand
= 1;
1222 while (*l
!= END_OF_INSN
); /* until we get end of insn */
1226 /* Now we've parsed the mnemonic into a set of templates, and have the
1229 Next, we find a template that matches the given insn,
1230 making sure the overlap of the given operands types is consistent
1231 with the template operand types. */
1233 #define MATCH(overlap, given, template) \
1235 && ((given) & BaseIndex) == ((overlap) & BaseIndex) \
1236 && ((given) & JumpAbsolute) == ((template) & JumpAbsolute))
1238 /* If given types r0 and r1 are registers they must be of the same type
1239 unless the expected operand type register overlap is null.
1240 Note that Acc in a template matches every size of reg. */
1241 #define CONSISTENT_REGISTER_MATCH(m0, g0, t0, m1, g1, t1) \
1242 ( ((g0) & Reg) == 0 || ((g1) & Reg) == 0 || \
1243 ((g0) & Reg) == ((g1) & Reg) || \
1244 ((((m0) & Acc) ? Reg : (t0)) & (((m1) & Acc) ? Reg : (t1)) & Reg) == 0 )
1247 register unsigned int overlap0
, overlap1
;
1249 unsigned int overlap2
;
1250 unsigned int found_reverse_match
;
1253 /* All intel opcodes have reversed operands except for BOUND and ENTER */
1255 && (strcmp (mnemonic
, "enter") != 0)
1256 && (strcmp (mnemonic
, "bound") != 0)
1257 && (strncmp (mnemonic
, "fsub", 4) !=0)
1258 && (strncmp (mnemonic
, "fdiv", 4) !=0))
1260 const reg_entry
*temp_reg
;
1261 expressionS
*temp_disp
;
1262 expressionS
*temp_imm
;
1263 unsigned int temp_type
;
1266 if (i
.operands
== 2)
1271 else if (i
.operands
== 3)
1279 temp_type
= i
.types
[xchg2
];
1280 if (temp_type
& (Reg
| FloatReg
))
1281 temp_reg
= i
.regs
[xchg2
];
1282 else if (temp_type
& Imm
)
1283 temp_imm
= i
.imms
[xchg2
];
1284 else if (temp_type
& Disp
)
1285 temp_disp
= i
.disps
[xchg2
];
1287 i
.types
[xchg2
] = i
.types
[xchg1
];
1289 if (i
.types
[xchg1
] & (Reg
| FloatReg
))
1291 i
.regs
[xchg2
] = i
.regs
[xchg1
];
1292 i
.regs
[xchg1
] = NULL
;
1294 else if (i
.types
[xchg2
] & Imm
)
1296 i
.imms
[xchg2
] = i
.imms
[xchg1
];
1297 i
.imms
[xchg1
] = NULL
;
1299 else if (i
.types
[xchg2
] & Disp
)
1301 i
.disps
[xchg2
] = i
.disps
[xchg1
];
1302 i
.disps
[xchg1
] = NULL
;
1305 if (temp_type
& (Reg
| FloatReg
))
1307 i
.regs
[xchg1
] = temp_reg
;
1308 if (! (i
.types
[xchg1
] & (Reg
| FloatReg
)))
1309 i
.regs
[xchg2
] = NULL
;
1311 else if (temp_type
& Imm
)
1313 i
.imms
[xchg1
] = temp_imm
;
1314 if (! (i
.types
[xchg1
] & Imm
))
1315 i
.imms
[xchg2
] = NULL
;
1317 else if (temp_type
& Disp
)
1319 i
.disps
[xchg1
] = temp_disp
;
1320 if (! (i
.types
[xchg1
] & Disp
))
1321 i
.disps
[xchg2
] = NULL
;
1324 i
.types
[xchg1
] = temp_type
;
1326 if (!strcmp(mnemonic
,"jmp")
1327 || !strcmp (mnemonic
, "call"))
1328 if ((i
.types
[0] & Reg
) || i
.types
[0] & BaseIndex
)
1329 i
.types
[0] |= JumpAbsolute
;
1335 found_reverse_match
= 0;
1336 suffix_check
= (i
.suffix
== BYTE_MNEM_SUFFIX
1338 : (i
.suffix
== WORD_MNEM_SUFFIX
1340 : (i
.suffix
== SHORT_MNEM_SUFFIX
1342 : (i
.suffix
== LONG_MNEM_SUFFIX
1344 : (i
.suffix
== INTEL_DWORD_MNEM_SUFFIX
1346 : (i
.suffix
== LONG_DOUBLE_MNEM_SUFFIX
? No_xSuf
: 0))))));
1348 for (t
= current_templates
->start
;
1349 t
< current_templates
->end
;
1352 /* Must have right number of operands. */
1353 if (i
.operands
!= t
->operands
)
1356 /* For some opcodes, don't check the suffix */
1359 if (strcmp (t
->name
, "fnstcw")
1360 && strcmp (t
->name
, "fldcw")
1361 && (t
->opcode_modifier
& suffix_check
))
1364 /* Must not have disallowed suffix. */
1365 else if ((t
->opcode_modifier
& suffix_check
))
1368 else if (!t
->operands
)
1369 break; /* 0 operands always matches */
1371 overlap0
= i
.types
[0] & t
->operand_types
[0];
1372 switch (t
->operands
)
1375 if (!MATCH (overlap0
, i
.types
[0], t
->operand_types
[0]))
1380 overlap1
= i
.types
[1] & t
->operand_types
[1];
1381 if (!MATCH (overlap0
, i
.types
[0], t
->operand_types
[0])
1382 || !MATCH (overlap1
, i
.types
[1], t
->operand_types
[1])
1383 || !CONSISTENT_REGISTER_MATCH (overlap0
, i
.types
[0],
1384 t
->operand_types
[0],
1385 overlap1
, i
.types
[1],
1386 t
->operand_types
[1]))
1389 /* check if other direction is valid ... */
1390 if ((t
->opcode_modifier
& (D
|FloatD
)) == 0)
1393 /* try reversing direction of operands */
1394 overlap0
= i
.types
[0] & t
->operand_types
[1];
1395 overlap1
= i
.types
[1] & t
->operand_types
[0];
1396 if (!MATCH (overlap0
, i
.types
[0], t
->operand_types
[1])
1397 || !MATCH (overlap1
, i
.types
[1], t
->operand_types
[0])
1398 || !CONSISTENT_REGISTER_MATCH (overlap0
, i
.types
[0],
1399 t
->operand_types
[1],
1400 overlap1
, i
.types
[1],
1401 t
->operand_types
[0]))
1403 /* does not match either direction */
1406 /* found_reverse_match holds which of D or FloatDR
1408 found_reverse_match
= t
->opcode_modifier
& (D
|FloatDR
);
1411 /* found a forward 2 operand match here */
1412 if (t
->operands
== 3)
1414 /* Here we make use of the fact that there are no
1415 reverse match 3 operand instructions, and all 3
1416 operand instructions only need to be checked for
1417 register consistency between operands 2 and 3. */
1418 overlap2
= i
.types
[2] & t
->operand_types
[2];
1419 if (!MATCH (overlap2
, i
.types
[2], t
->operand_types
[2])
1420 || !CONSISTENT_REGISTER_MATCH (overlap1
, i
.types
[1],
1421 t
->operand_types
[1],
1422 overlap2
, i
.types
[2],
1423 t
->operand_types
[2]))
1427 /* found either forward/reverse 2 or 3 operand match here:
1428 slip through to break */
1430 break; /* we've found a match; break out of loop */
1431 } /* for (t = ... */
1432 if (t
== current_templates
->end
)
1433 { /* we found no match */
1434 as_bad (_("suffix or operands invalid for `%s'"),
1435 current_templates
->start
->name
);
1439 if ((t
->opcode_modifier
& (IsPrefix
|IgnoreSize
)) == (IsPrefix
|IgnoreSize
))
1441 /* Warn them that a data or address size prefix doesn't affect
1442 assembly of the next line of code. */
1443 as_warn (_("stand-alone `%s' prefix"), t
->name
);
1446 /* Copy the template we found. */
1448 if (found_reverse_match
)
1450 i
.tm
.operand_types
[0] = t
->operand_types
[1];
1451 i
.tm
.operand_types
[1] = t
->operand_types
[0];
1455 if (i
.tm
.opcode_modifier
& FWait
)
1456 if (! add_prefix (FWAIT_OPCODE
))
1459 /* Check string instruction segment overrides */
1460 if ((i
.tm
.opcode_modifier
& IsString
) != 0 && i
.mem_operands
!= 0)
1462 int mem_op
= (i
.types
[0] & AnyMem
) ? 0 : 1;
1463 if ((i
.tm
.operand_types
[mem_op
] & EsSeg
) != 0)
1465 if (i
.seg
[0] != NULL
&& i
.seg
[0] != &es
)
1467 as_bad (_("`%s' operand %d must use `%%es' segment"),
1472 /* There's only ever one segment override allowed per instruction.
1473 This instruction possibly has a legal segment override on the
1474 second operand, so copy the segment to where non-string
1475 instructions store it, allowing common code. */
1476 i
.seg
[0] = i
.seg
[1];
1478 else if ((i
.tm
.operand_types
[mem_op
+ 1] & EsSeg
) != 0)
1480 if (i
.seg
[1] != NULL
&& i
.seg
[1] != &es
)
1482 as_bad (_("`%s' operand %d must use `%%es' segment"),
1490 /* If matched instruction specifies an explicit instruction mnemonic
1492 if (i
.tm
.opcode_modifier
& (Size16
| Size32
))
1494 if (i
.tm
.opcode_modifier
& Size16
)
1495 i
.suffix
= WORD_MNEM_SUFFIX
;
1497 i
.suffix
= DWORD_MNEM_SUFFIX
;
1499 else if (i
.reg_operands
)
1501 /* If there's no instruction mnemonic suffix we try to invent one
1502 based on register operands. */
1505 /* We take i.suffix from the last register operand specified,
1506 Destination register type is more significant than source
1509 for (op
= i
.operands
; --op
>= 0; )
1510 if (i
.types
[op
] & Reg
)
1512 i
.suffix
= ((i
.types
[op
] & Reg8
) ? BYTE_MNEM_SUFFIX
:
1513 (i
.types
[op
] & Reg16
) ? WORD_MNEM_SUFFIX
:
1518 else if (i
.suffix
== BYTE_MNEM_SUFFIX
)
1521 for (op
= i
.operands
; --op
>= 0; )
1523 /* If this is an eight bit register, it's OK. If it's
1524 the 16 or 32 bit version of an eight bit register,
1525 we will just use the low portion, and that's OK too. */
1526 if (i
.types
[op
] & Reg8
)
1529 /* movzx and movsx should not generate this warning. */
1531 && (i
.tm
.base_opcode
== 0xfb7
1532 || i
.tm
.base_opcode
== 0xfb6
1533 || i
.tm
.base_opcode
== 0xfbe
1534 || i
.tm
.base_opcode
== 0xfbf))
1537 if ((i
.types
[op
] & WordReg
) && i
.regs
[op
]->reg_num
< 4
1539 /* Check that the template allows eight bit regs
1540 This kills insns such as `orb $1,%edx', which
1541 maybe should be allowed. */
1542 && (i
.tm
.operand_types
[op
] & (Reg8
|InOutPortReg
))
1546 #if REGISTER_WARNINGS
1547 if ((i
.tm
.operand_types
[op
] & InOutPortReg
) == 0)
1548 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
1549 (i
.regs
[op
] - (i
.types
[op
] & Reg16
? 8 : 16))->reg_name
,
1550 i
.regs
[op
]->reg_name
,
1555 /* Any other register is bad */
1556 if (i
.types
[op
] & (Reg
| RegMMX
| RegXMM
1558 | Control
| Debug
| Test
1559 | FloatReg
| FloatAcc
))
1561 as_bad (_("`%%%s' not allowed with `%s%c'"),
1562 i
.regs
[op
]->reg_name
,
1569 else if (i
.suffix
== DWORD_MNEM_SUFFIX
)
1572 for (op
= i
.operands
; --op
>= 0; )
1573 /* Reject eight bit registers, except where the template
1574 requires them. (eg. movzb) */
1575 if ((i
.types
[op
] & Reg8
) != 0
1576 && (i
.tm
.operand_types
[op
] & (Reg16
|Reg32
|Acc
)) != 0)
1578 as_bad (_("`%%%s' not allowed with `%s%c'"),
1579 i
.regs
[op
]->reg_name
,
1584 #if REGISTER_WARNINGS
1585 /* Warn if the e prefix on a general reg is missing. */
1586 else if ((i
.types
[op
] & Reg16
) != 0
1587 && (i
.tm
.operand_types
[op
] & (Reg32
|Acc
)) != 0)
1589 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
1590 (i
.regs
[op
] + 8)->reg_name
,
1591 i
.regs
[op
]->reg_name
,
1596 else if (i
.suffix
== WORD_MNEM_SUFFIX
)
1599 for (op
= i
.operands
; --op
>= 0; )
1600 /* Reject eight bit registers, except where the template
1601 requires them. (eg. movzb) */
1602 if ((i
.types
[op
] & Reg8
) != 0
1603 && (i
.tm
.operand_types
[op
] & (Reg16
|Reg32
|Acc
)) != 0)
1605 as_bad (_("`%%%s' not allowed with `%s%c'"),
1606 i
.regs
[op
]->reg_name
,
1611 #if REGISTER_WARNINGS
1612 /* Warn if the e prefix on a general reg is present. */
1613 else if ((i
.types
[op
] & Reg32
) != 0
1614 && (i
.tm
.operand_types
[op
] & (Reg16
|Acc
)) != 0)
1616 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
1617 (i
.regs
[op
] - 8)->reg_name
,
1618 i
.regs
[op
]->reg_name
,
1627 /* Make still unresolved immediate matches conform to size of immediate
1628 given in i.suffix. Note: overlap2 cannot be an immediate! */
1629 if ((overlap0
& (Imm8
| Imm8S
| Imm16
| Imm32
))
1630 && overlap0
!= Imm8
&& overlap0
!= Imm8S
1631 && overlap0
!= Imm16
&& overlap0
!= Imm32
)
1635 overlap0
&= (i
.suffix
== BYTE_MNEM_SUFFIX
? (Imm8
| Imm8S
) :
1636 (i
.suffix
== WORD_MNEM_SUFFIX
? Imm16
: Imm32
));
1638 else if (overlap0
== (Imm16
| Imm32
))
1641 (flag_16bit_code
^ (i
.prefix
[DATA_PREFIX
] != 0)) ? Imm16
: Imm32
;
1645 as_bad (_("no instruction mnemonic suffix given; can't determine immediate size"));
1649 if ((overlap1
& (Imm8
| Imm8S
| Imm16
| Imm32
))
1650 && overlap1
!= Imm8
&& overlap1
!= Imm8S
1651 && overlap1
!= Imm16
&& overlap1
!= Imm32
)
1655 overlap1
&= (i
.suffix
== BYTE_MNEM_SUFFIX
? (Imm8
| Imm8S
) :
1656 (i
.suffix
== WORD_MNEM_SUFFIX
? Imm16
: Imm32
));
1658 else if (overlap1
== (Imm16
| Imm32
))
1661 (flag_16bit_code
^ (i
.prefix
[DATA_PREFIX
] != 0)) ? Imm16
: Imm32
;
1665 as_bad (_("no instruction mnemonic suffix given; can't determine immediate size"));
1669 assert ((overlap2
& Imm
) == 0);
1671 i
.types
[0] = overlap0
;
1672 if (overlap0
& ImplicitRegister
)
1674 if (overlap0
& Imm1
)
1675 i
.imm_operands
= 0; /* kludge for shift insns */
1677 i
.types
[1] = overlap1
;
1678 if (overlap1
& ImplicitRegister
)
1681 i
.types
[2] = overlap2
;
1682 if (overlap2
& ImplicitRegister
)
1685 /* Finalize opcode. First, we change the opcode based on the operand
1686 size given by i.suffix: We need not change things for byte insns. */
1688 if (!i
.suffix
&& (i
.tm
.opcode_modifier
& W
))
1690 as_bad (_("no instruction mnemonic suffix given and no register operands; can't size instruction"));
1694 /* For movzx and movsx, need to check the register type */
1696 && (i
.tm
.base_opcode
== 0xfb6 || i
.tm
.base_opcode
== 0xfbe))
1697 if (i
.suffix
&& i
.suffix
== BYTE_MNEM_SUFFIX
)
1699 unsigned int prefix
= DATA_PREFIX_OPCODE
;
1701 if ((i
.regs
[1]->reg_type
& Reg16
) != 0)
1702 if (!add_prefix (prefix
))
1706 if (i
.suffix
&& i
.suffix
!= BYTE_MNEM_SUFFIX
)
1708 /* It's not a byte, select word/dword operation. */
1709 if (i
.tm
.opcode_modifier
& W
)
1711 if (i
.tm
.opcode_modifier
& ShortForm
)
1712 i
.tm
.base_opcode
|= 8;
1714 i
.tm
.base_opcode
|= 1;
1716 /* Now select between word & dword operations via the operand
1717 size prefix, except for instructions that will ignore this
1719 if (((intel_syntax
&& (i
.suffix
== INTEL_DWORD_MNEM_SUFFIX
))
1720 || i
.suffix
== DWORD_MNEM_SUFFIX
1721 || i
.suffix
== LONG_MNEM_SUFFIX
) == flag_16bit_code
1722 && !(i
.tm
.opcode_modifier
& IgnoreSize
))
1724 unsigned int prefix
= DATA_PREFIX_OPCODE
;
1725 if (i
.tm
.opcode_modifier
& JumpByte
) /* jcxz, loop */
1726 prefix
= ADDR_PREFIX_OPCODE
;
1728 if (! add_prefix (prefix
))
1731 /* Size floating point instruction. */
1732 if (i
.suffix
== LONG_MNEM_SUFFIX
1733 || (intel_syntax
&& i
.suffix
== INTEL_DWORD_MNEM_SUFFIX
))
1735 if (i
.tm
.opcode_modifier
& FloatMF
)
1736 i
.tm
.base_opcode
^= 4;
1739 if (intel_syntax
&& i
.suffix
== LONG_DOUBLE_MNEM_SUFFIX
)
1741 if (i
.tm
.opcode_modifier
& FloatMF
)
1742 i
.tm
.base_opcode
^= 2;
1746 if (i
.tm
.opcode_modifier
& ImmExt
)
1748 /* These AMD 3DNow! and Intel Katmai New Instructions have an
1749 opcode suffix which is coded in the same place as an 8-bit
1750 immediate field would be. Here we fake an 8-bit immediate
1751 operand from the opcode suffix stored in tm.extension_opcode. */
1755 assert(i
.imm_operands
== 0 && i
.operands
<= 2);
1757 exp
= &im_expressions
[i
.imm_operands
++];
1758 i
.imms
[i
.operands
] = exp
;
1759 i
.types
[i
.operands
++] = Imm8
;
1760 exp
->X_op
= O_constant
;
1761 exp
->X_add_number
= i
.tm
.extension_opcode
;
1762 i
.tm
.extension_opcode
= None
;
1765 /* For insns with operands there are more diddles to do to the opcode. */
1768 /* Default segment register this instruction will use
1769 for memory accesses. 0 means unknown.
1770 This is only for optimizing out unnecessary segment overrides. */
1771 const seg_entry
*default_seg
= 0;
1773 /* If we found a reverse match we must alter the opcode
1774 direction bit. found_reverse_match holds bits to change
1775 (different for int & float insns). */
1777 i
.tm
.base_opcode
^= found_reverse_match
;
1779 /* The imul $imm, %reg instruction is converted into
1780 imul $imm, %reg, %reg, and the clr %reg instruction
1781 is converted into xor %reg, %reg. */
1782 if (i
.tm
.opcode_modifier
& regKludge
)
1784 unsigned int first_reg_op
= (i
.types
[0] & Reg
) ? 0 : 1;
1785 /* Pretend we saw the extra register operand. */
1786 i
.regs
[first_reg_op
+1] = i
.regs
[first_reg_op
];
1790 if (i
.tm
.opcode_modifier
& ShortForm
)
1792 /* The register or float register operand is in operand 0 or 1. */
1793 unsigned int op
= (i
.types
[0] & (Reg
| FloatReg
)) ? 0 : 1;
1794 /* Register goes in low 3 bits of opcode. */
1795 i
.tm
.base_opcode
|= i
.regs
[op
]->reg_num
;
1796 if ((i
.tm
.opcode_modifier
& Ugh
) != 0)
1798 /* Warn about some common errors, but press on regardless.
1799 The first case can be generated by gcc (<= 2.8.1). */
1800 if (i
.operands
== 2)
1802 /* reversed arguments on faddp, fsubp, etc. */
1803 as_warn (_("translating to `%s %%%s,%%%s'"), i
.tm
.name
,
1804 i
.regs
[1]->reg_name
,
1805 i
.regs
[0]->reg_name
);
1809 /* extraneous `l' suffix on fp insn */
1810 as_warn (_("translating to `%s %%%s'"), i
.tm
.name
,
1811 i
.regs
[0]->reg_name
);
1815 else if (i
.tm
.opcode_modifier
& Modrm
)
1817 /* The opcode is completed (modulo i.tm.extension_opcode which
1818 must be put into the modrm byte).
1819 Now, we make the modrm & index base bytes based on all the
1820 info we've collected. */
1822 /* i.reg_operands MUST be the number of real register operands;
1823 implicit registers do not count. */
1824 if (i
.reg_operands
== 2)
1826 unsigned int source
, dest
;
1827 source
= ((i
.types
[0]
1828 & (Reg
| RegMMX
| RegXMM
1830 | Control
| Debug
| Test
))
1835 /* One of the register operands will be encoded in the
1836 i.tm.reg field, the other in the combined i.tm.mode
1837 and i.tm.regmem fields. If no form of this
1838 instruction supports a memory destination operand,
1839 then we assume the source operand may sometimes be
1840 a memory operand and so we need to store the
1841 destination in the i.rm.reg field. */
1842 if ((i
.tm
.operand_types
[dest
] & AnyMem
) == 0)
1844 i
.rm
.reg
= i
.regs
[dest
]->reg_num
;
1845 i
.rm
.regmem
= i
.regs
[source
]->reg_num
;
1849 i
.rm
.reg
= i
.regs
[source
]->reg_num
;
1850 i
.rm
.regmem
= i
.regs
[dest
]->reg_num
;
1854 { /* if it's not 2 reg operands... */
1857 unsigned int fake_zero_displacement
= 0;
1858 unsigned int op
= ((i
.types
[0] & AnyMem
)
1860 : (i
.types
[1] & AnyMem
) ? 1 : 2);
1867 if (! i
.disp_operands
)
1868 fake_zero_displacement
= 1;
1871 /* Operand is just <disp> */
1872 if (flag_16bit_code
^ (i
.prefix
[ADDR_PREFIX
] != 0))
1874 i
.rm
.regmem
= NO_BASE_REGISTER_16
;
1875 i
.types
[op
] &= ~Disp
;
1876 i
.types
[op
] |= Disp16
;
1880 i
.rm
.regmem
= NO_BASE_REGISTER
;
1881 i
.types
[op
] &= ~Disp
;
1882 i
.types
[op
] |= Disp32
;
1885 else /* ! i.base_reg && i.index_reg */
1887 i
.sib
.index
= i
.index_reg
->reg_num
;
1888 i
.sib
.base
= NO_BASE_REGISTER
;
1889 i
.sib
.scale
= i
.log2_scale_factor
;
1890 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
1891 i
.types
[op
] &= ~Disp
;
1892 i
.types
[op
] |= Disp32
; /* Must be 32 bit */
1895 else if (i
.base_reg
->reg_type
& Reg16
)
1897 switch (i
.base_reg
->reg_num
)
1902 else /* (%bx,%si) -> 0, or (%bx,%di) -> 1 */
1903 i
.rm
.regmem
= i
.index_reg
->reg_num
- 6;
1910 if ((i
.types
[op
] & Disp
) == 0)
1912 /* fake (%bp) into 0(%bp) */
1913 i
.types
[op
] |= Disp8
;
1914 fake_zero_displacement
= 1;
1917 else /* (%bp,%si) -> 2, or (%bp,%di) -> 3 */
1918 i
.rm
.regmem
= i
.index_reg
->reg_num
- 6 + 2;
1920 default: /* (%si) -> 4 or (%di) -> 5 */
1921 i
.rm
.regmem
= i
.base_reg
->reg_num
- 6 + 4;
1923 i
.rm
.mode
= mode_from_disp_size (i
.types
[op
]);
1925 else /* i.base_reg and 32 bit mode */
1927 i
.rm
.regmem
= i
.base_reg
->reg_num
;
1928 i
.sib
.base
= i
.base_reg
->reg_num
;
1929 if (i
.base_reg
->reg_num
== EBP_REG_NUM
)
1932 if (i
.disp_operands
== 0)
1934 fake_zero_displacement
= 1;
1935 i
.types
[op
] |= Disp8
;
1938 else if (i
.base_reg
->reg_num
== ESP_REG_NUM
)
1942 i
.sib
.scale
= i
.log2_scale_factor
;
1945 /* <disp>(%esp) becomes two byte modrm
1946 with no index register. We've already
1947 stored the code for esp in i.rm.regmem
1948 ie. ESCAPE_TO_TWO_BYTE_ADDRESSING. Any
1949 base register besides %esp will not use
1950 the extra modrm byte. */
1951 i
.sib
.index
= NO_INDEX_REGISTER
;
1952 #if ! SCALE1_WHEN_NO_INDEX
1953 /* Another case where we force the second
1955 if (i
.log2_scale_factor
)
1956 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
1961 i
.sib
.index
= i
.index_reg
->reg_num
;
1962 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
1964 i
.rm
.mode
= mode_from_disp_size (i
.types
[op
]);
1967 if (fake_zero_displacement
)
1969 /* Fakes a zero displacement assuming that i.types[op]
1970 holds the correct displacement size. */
1971 exp
= &disp_expressions
[i
.disp_operands
++];
1973 exp
->X_op
= O_constant
;
1974 exp
->X_add_number
= 0;
1975 exp
->X_add_symbol
= (symbolS
*) 0;
1976 exp
->X_op_symbol
= (symbolS
*) 0;
1980 /* Fill in i.rm.reg or i.rm.regmem field with register
1981 operand (if any) based on i.tm.extension_opcode.
1982 Again, we must be careful to make sure that
1983 segment/control/debug/test/MMX registers are coded
1984 into the i.rm.reg field. */
1989 & (Reg
| RegMMX
| RegXMM
1991 | Control
| Debug
| Test
))
1994 & (Reg
| RegMMX
| RegXMM
1996 | Control
| Debug
| Test
))
1999 /* If there is an extension opcode to put here, the
2000 register number must be put into the regmem field. */
2001 if (i
.tm
.extension_opcode
!= None
)
2002 i
.rm
.regmem
= i
.regs
[op
]->reg_num
;
2004 i
.rm
.reg
= i
.regs
[op
]->reg_num
;
2006 /* Now, if no memory operand has set i.rm.mode = 0, 1, 2
2007 we must set it to 3 to indicate this is a register
2008 operand in the regmem field. */
2009 if (!i
.mem_operands
)
2013 /* Fill in i.rm.reg field with extension opcode (if any). */
2014 if (i
.tm
.extension_opcode
!= None
)
2015 i
.rm
.reg
= i
.tm
.extension_opcode
;
2018 else if (i
.tm
.opcode_modifier
& (Seg2ShortForm
| Seg3ShortForm
))
2020 if (i
.tm
.base_opcode
== POP_SEG_SHORT
&& i
.regs
[0]->reg_num
== 1)
2022 as_bad (_("you can't `pop %%cs'"));
2025 i
.tm
.base_opcode
|= (i
.regs
[0]->reg_num
<< 3);
2027 else if ((i
.tm
.base_opcode
& ~(D
|W
)) == MOV_AX_DISP32
)
2031 else if ((i
.tm
.opcode_modifier
& IsString
) != 0)
2033 /* For the string instructions that allow a segment override
2034 on one of their operands, the default segment is ds. */
2038 /* If a segment was explicitly specified,
2039 and the specified segment is not the default,
2040 use an opcode prefix to select it.
2041 If we never figured out what the default segment is,
2042 then default_seg will be zero at this point,
2043 and the specified segment prefix will always be used. */
2044 if ((i
.seg
[0]) && (i
.seg
[0] != default_seg
))
2046 if (! add_prefix (i
.seg
[0]->seg_prefix
))
2050 else if ((i
.tm
.opcode_modifier
& Ugh
) != 0)
2052 /* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc */
2053 as_warn (_("translating to `%sp'"), i
.tm
.name
);
2057 /* Handle conversion of 'int $3' --> special int3 insn. */
2058 if (i
.tm
.base_opcode
== INT_OPCODE
&& i
.imms
[0]->X_add_number
== 3)
2060 i
.tm
.base_opcode
= INT3_OPCODE
;
2064 /* We are ready to output the insn. */
2069 if (i
.tm
.opcode_modifier
& Jump
)
2071 long n
= (long) i
.disps
[0]->X_add_number
;
2072 int prefix
= (i
.prefix
[DATA_PREFIX
] != 0);
2080 if (flag_16bit_code
)
2083 if (!intel_syntax
&& (i
.prefixes
!= 0))
2084 as_warn (_("skipping prefixes on this instruction"));
2086 if (i
.disps
[0]->X_op
== O_constant
)
2088 if (fits_in_signed_byte (n
))
2092 p
[0] = i
.tm
.base_opcode
;
2097 /* Use 16-bit jumps only for 16-bit code,
2098 because text segments are limited to 64K anyway;
2099 Use 32-bit jumps for 32-bit code, because they're faster,
2100 and a 16-bit jump will clear the top 16 bits of %eip. */
2101 int jmp_size
= code16
? 2 : 4;
2102 if (code16
&& !fits_in_signed_word (n
))
2104 as_bad (_("16-bit jump out of range"));
2108 if (i
.tm
.base_opcode
== JUMP_PC_RELATIVE
)
2110 /* unconditional jump */
2111 insn_size
+= prefix
+ 1 + jmp_size
;
2112 p
= frag_more (prefix
+ 1 + jmp_size
);
2114 *p
++ = DATA_PREFIX_OPCODE
;
2116 md_number_to_chars (p
, (valueT
) n
, jmp_size
);
2120 /* conditional jump */
2121 insn_size
+= prefix
+ 2 + jmp_size
;
2122 p
= frag_more (prefix
+ 2 + jmp_size
);
2124 *p
++ = DATA_PREFIX_OPCODE
;
2125 *p
++ = TWO_BYTE_OPCODE_ESCAPE
;
2126 *p
++ = i
.tm
.base_opcode
+ 0x10;
2127 md_number_to_chars (p
, (valueT
) n
, jmp_size
);
2133 int size
= code16
? 2 : 4;
2135 /* It's a symbol; end frag & setup for relax.
2136 Make sure there are more than 6 chars left in the current frag;
2137 if not we'll have to start a new one. */
2138 frag_grow (prefix
+ 1 + 2 + size
);
2139 insn_size
+= 1 + prefix
;
2140 p
= frag_more (1 + prefix
);
2142 *p
++ = DATA_PREFIX_OPCODE
;
2143 *p
= i
.tm
.base_opcode
;
2144 frag_var (rs_machine_dependent
,
2145 prefix
+ 2 + size
, /* 2 opcode/prefix + displacement */
2147 ((unsigned char) *p
== JUMP_PC_RELATIVE
2148 ? ENCODE_RELAX_STATE (UNCOND_JUMP
, SMALL
) | code16
2149 : ENCODE_RELAX_STATE (COND_JUMP
, SMALL
) | code16
),
2150 i
.disps
[0]->X_add_symbol
,
2154 else if (i
.tm
.opcode_modifier
& (JumpByte
| JumpDword
))
2156 int size
= (i
.tm
.opcode_modifier
& JumpByte
) ? 1 : 4;
2157 long n
= (long) i
.disps
[0]->X_add_number
;
2159 if (size
== 1) /* then this is a loop or jecxz type instruction */
2161 if (i
.prefix
[ADDR_PREFIX
])
2164 FRAG_APPEND_1_CHAR (ADDR_PREFIX_OPCODE
);
2172 if (i
.prefix
[DATA_PREFIX
])
2175 FRAG_APPEND_1_CHAR (DATA_PREFIX_OPCODE
);
2179 if (flag_16bit_code
)
2186 if (!intel_syntax
&& (i
.prefixes
!= 0))
2187 as_warn (_("skipping prefixes on this instruction"));
2189 if (fits_in_unsigned_byte (i
.tm
.base_opcode
))
2191 insn_size
+= 1 + size
;
2192 p
= frag_more (1 + size
);
2196 insn_size
+= 2 + size
; /* opcode can be at most two bytes */
2197 p
= frag_more (2 + size
);
2198 *p
++ = (i
.tm
.base_opcode
>> 8) & 0xff;
2200 *p
++ = i
.tm
.base_opcode
& 0xff;
2202 if (i
.disps
[0]->X_op
== O_constant
)
2204 if (size
== 1 && !fits_in_signed_byte (n
))
2206 as_bad (_("`%s' only takes byte displacement; %ld shortened to %d"),
2209 else if (size
== 2 && !fits_in_signed_word (n
))
2211 as_bad (_("16-bit jump out of range"));
2214 md_number_to_chars (p
, (valueT
) n
, size
);
2218 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
2219 i
.disps
[0], 1, reloc (size
, 1, i
.disp_reloc
[0]));
2223 else if (i
.tm
.opcode_modifier
& JumpInterSegment
)
2227 int prefix
= i
.prefix
[DATA_PREFIX
] != 0;
2235 if (flag_16bit_code
)
2239 reloc_type
= BFD_RELOC_32
;
2243 reloc_type
= BFD_RELOC_16
;
2246 if (!intel_syntax
&& (i
.prefixes
!= 0))
2247 as_warn (_("skipping prefixes on this instruction"));
2249 insn_size
+= prefix
+ 1 + 2 + size
; /* 1 opcode; 2 segment; offset */
2250 p
= frag_more (prefix
+ 1 + 2 + size
);
2252 *p
++ = DATA_PREFIX_OPCODE
;
2253 *p
++ = i
.tm
.base_opcode
;
2254 if (i
.imms
[1]->X_op
== O_constant
)
2256 long n
= (long) i
.imms
[1]->X_add_number
;
2258 if (size
== 2 && !fits_in_unsigned_word (n
))
2260 as_bad (_("16-bit jump out of range"));
2263 md_number_to_chars (p
, (valueT
) n
, size
);
2266 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
2267 i
.imms
[1], 0, reloc_type
);
2268 if (i
.imms
[0]->X_op
!= O_constant
)
2269 as_bad (_("can't handle non absolute segment in `%s'"),
2271 md_number_to_chars (p
+ size
, (valueT
) i
.imms
[0]->X_add_number
, 2);
2275 /* Output normal instructions here. */
2278 /* The prefix bytes. */
2280 q
< i
.prefix
+ sizeof (i
.prefix
) / sizeof (i
.prefix
[0]);
2287 md_number_to_chars (p
, (valueT
) *q
, 1);
2291 /* Now the opcode; be careful about word order here! */
2292 if (fits_in_unsigned_byte (i
.tm
.base_opcode
))
2295 FRAG_APPEND_1_CHAR (i
.tm
.base_opcode
);
2297 else if (fits_in_unsigned_word (i
.tm
.base_opcode
))
2301 /* put out high byte first: can't use md_number_to_chars! */
2302 *p
++ = (i
.tm
.base_opcode
>> 8) & 0xff;
2303 *p
= i
.tm
.base_opcode
& 0xff;
2306 { /* opcode is either 3 or 4 bytes */
2307 if (i
.tm
.base_opcode
& 0xff000000)
2311 *p
++ = (i
.tm
.base_opcode
>> 24) & 0xff;
2318 *p
++ = (i
.tm
.base_opcode
>> 16) & 0xff;
2319 *p
++ = (i
.tm
.base_opcode
>> 8) & 0xff;
2320 *p
= (i
.tm
.base_opcode
) & 0xff;
2323 /* Now the modrm byte and sib byte (if present). */
2324 if (i
.tm
.opcode_modifier
& Modrm
)
2328 md_number_to_chars (p
,
2329 (valueT
) (i
.rm
.regmem
<< 0
2333 /* If i.rm.regmem == ESP (4)
2334 && i.rm.mode != (Register mode)
2336 ==> need second modrm byte. */
2337 if (i
.rm
.regmem
== ESCAPE_TO_TWO_BYTE_ADDRESSING
2339 && !(i
.base_reg
&& (i
.base_reg
->reg_type
& Reg16
) != 0))
2343 md_number_to_chars (p
,
2344 (valueT
) (i
.sib
.base
<< 0
2346 | i
.sib
.scale
<< 6),
2351 if (i
.disp_operands
)
2353 register unsigned int n
;
2355 for (n
= 0; n
< i
.operands
; n
++)
2359 if (i
.disps
[n
]->X_op
== O_constant
)
2361 if (i
.types
[n
] & Disp8
)
2365 md_number_to_chars (p
,
2366 (valueT
) i
.disps
[n
]->X_add_number
,
2369 else if (i
.types
[n
] & Disp16
)
2373 md_number_to_chars (p
,
2374 (valueT
) i
.disps
[n
]->X_add_number
,
2381 md_number_to_chars (p
,
2382 (valueT
) i
.disps
[n
]->X_add_number
,
2386 else if (i
.types
[n
] & Disp32
)
2390 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, 4,
2392 TC_RELOC (i
.disp_reloc
[n
], BFD_RELOC_32
));
2395 { /* must be Disp16 */
2398 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, 2,
2400 TC_RELOC (i
.disp_reloc
[n
], BFD_RELOC_16
));
2404 } /* end displacement output */
2406 /* output immediate */
2409 register unsigned int n
;
2411 for (n
= 0; n
< i
.operands
; n
++)
2415 if (i
.imms
[n
]->X_op
== O_constant
)
2417 if (i
.types
[n
] & (Imm8
| Imm8S
))
2421 md_number_to_chars (p
,
2422 (valueT
) i
.imms
[n
]->X_add_number
,
2425 else if (i
.types
[n
] & Imm16
)
2429 md_number_to_chars (p
,
2430 (valueT
) i
.imms
[n
]->X_add_number
,
2437 md_number_to_chars (p
,
2438 (valueT
) i
.imms
[n
]->X_add_number
,
2443 { /* not absolute_section */
2444 /* Need a 32-bit fixup (don't support 8bit
2445 non-absolute ims). Try to support other
2451 if (i
.types
[n
] & (Imm8
| Imm8S
))
2453 else if (i
.types
[n
] & Imm16
)
2458 p
= frag_more (size
);
2459 r_type
= reloc (size
, 0, i
.disp_reloc
[0]);
2460 #ifdef BFD_ASSEMBLER
2461 if (r_type
== BFD_RELOC_32
2463 && GOT_symbol
== i
.imms
[n
]->X_add_symbol
2464 && (i
.imms
[n
]->X_op
== O_symbol
2465 || (i
.imms
[n
]->X_op
== O_add
2466 && ((symbol_get_value_expression
2467 (i
.imms
[n
]->X_op_symbol
)->X_op
)
2470 r_type
= BFD_RELOC_386_GOTPC
;
2471 i
.imms
[n
]->X_add_number
+= 3;
2474 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
2475 i
.imms
[n
], pcrel
, r_type
);
2479 } /* end immediate output */
2487 #endif /* DEBUG386 */
2491 static int i386_is_reg
PARAMS ((char *));
2494 i386_is_reg (reg_string
)
2497 register char *s
= reg_string
;
2499 char reg_name_given
[MAX_REG_NAME_SIZE
+ 1];
2501 if (is_space_char (*s
))
2505 while ((*p
++ = register_chars
[(unsigned char) *s
++]) != '\0')
2506 if (p
>= reg_name_given
+ MAX_REG_NAME_SIZE
)
2509 if (!hash_find (reg_hash
, reg_name_given
))
2515 static int i386_immediate
PARAMS ((char *));
2518 i386_immediate (imm_start
)
2521 char *save_input_line_pointer
;
2525 if (i
.imm_operands
== MAX_IMMEDIATE_OPERANDS
)
2527 as_bad (_("Only 1 or 2 immediate operands are allowed"));
2531 exp
= &im_expressions
[i
.imm_operands
++];
2532 i
.imms
[this_operand
] = exp
;
2534 if (is_space_char (*imm_start
))
2537 save_input_line_pointer
= input_line_pointer
;
2538 input_line_pointer
= imm_start
;
2543 * We can have operands of the form
2544 * <symbol>@GOTOFF+<nnn>
2545 * Take the easy way out here and copy everything
2546 * into a temporary buffer...
2550 cp
= strchr (input_line_pointer
, '@');
2556 /* GOT relocations are not supported in 16 bit mode */
2557 if (flag_16bit_code
)
2558 as_bad (_("GOT relocations not supported in 16 bit mode"));
2560 if (GOT_symbol
== NULL
)
2561 GOT_symbol
= symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME
);
2563 if (strncmp (cp
+ 1, "PLT", 3) == 0)
2565 i
.disp_reloc
[this_operand
] = BFD_RELOC_386_PLT32
;
2568 else if (strncmp (cp
+ 1, "GOTOFF", 6) == 0)
2570 i
.disp_reloc
[this_operand
] = BFD_RELOC_386_GOTOFF
;
2573 else if (strncmp (cp
+ 1, "GOT", 3) == 0)
2575 i
.disp_reloc
[this_operand
] = BFD_RELOC_386_GOT32
;
2579 as_bad (_("Bad reloc specifier in expression"));
2581 /* Replace the relocation token with ' ', so that errors like
2582 foo@GOTOFF1 will be detected. */
2583 first
= cp
- input_line_pointer
;
2584 tmpbuf
= (char *) alloca (strlen(input_line_pointer
));
2585 memcpy (tmpbuf
, input_line_pointer
, first
);
2586 tmpbuf
[first
] = ' ';
2587 strcpy (tmpbuf
+ first
+ 1, cp
+ 1 + len
);
2588 input_line_pointer
= tmpbuf
;
2593 exp_seg
= expression (exp
);
2596 if (*input_line_pointer
)
2597 as_bad (_("Ignoring junk `%s' after expression"), input_line_pointer
);
2599 input_line_pointer
= save_input_line_pointer
;
2601 if (exp
->X_op
== O_absent
)
2603 /* missing or bad expr becomes absolute 0 */
2604 as_bad (_("Missing or invalid immediate expression `%s' taken as 0"),
2606 exp
->X_op
= O_constant
;
2607 exp
->X_add_number
= 0;
2608 exp
->X_add_symbol
= (symbolS
*) 0;
2609 exp
->X_op_symbol
= (symbolS
*) 0;
2610 i
.types
[this_operand
] |= Imm
;
2612 else if (exp
->X_op
== O_constant
)
2614 i
.types
[this_operand
] |=
2615 smallest_imm_type ((long) exp
->X_add_number
);
2617 /* If a suffix is given, this operand may be shortended. */
2620 case WORD_MNEM_SUFFIX
:
2621 i
.types
[this_operand
] |= Imm16
;
2623 case BYTE_MNEM_SUFFIX
:
2624 i
.types
[this_operand
] |= Imm16
| Imm8
| Imm8S
;
2629 else if (exp_seg
!= text_section
2630 && exp_seg
!= data_section
2631 && exp_seg
!= bss_section
2632 && exp_seg
!= undefined_section
2633 #ifdef BFD_ASSEMBLER
2634 && !bfd_is_com_section (exp_seg
)
2638 as_bad (_("Unimplemented segment type %d in operand"), exp_seg
);
2644 /* This is an address. The size of the address will be
2645 determined later, depending on destination register,
2646 suffix, or the default for the section. We exclude
2647 Imm8S here so that `push $foo' and other instructions
2648 with an Imm8S form will use Imm16 or Imm32. */
2649 i
.types
[this_operand
] |= (Imm8
| Imm16
| Imm32
);
2655 static int i386_scale
PARAMS ((char *));
2661 if (!isdigit (*scale
))
2668 i
.log2_scale_factor
= 0;
2671 i
.log2_scale_factor
= 1;
2674 i
.log2_scale_factor
= 2;
2677 i
.log2_scale_factor
= 3;
2681 as_bad (_("expecting scale factor of 1, 2, 4, or 8: got `%s'"),
2685 if (i
.log2_scale_factor
!= 0 && ! i
.index_reg
)
2687 as_warn (_("scale factor of %d without an index register"),
2688 1 << i
.log2_scale_factor
);
2689 #if SCALE1_WHEN_NO_INDEX
2690 i
.log2_scale_factor
= 0;
2696 static int i386_displacement
PARAMS ((char *, char *));
2699 i386_displacement (disp_start
, disp_end
)
2703 register expressionS
*exp
;
2705 char *save_input_line_pointer
;
2706 int bigdisp
= Disp32
;
2708 /* All of the pieces of the displacement expression are handled together. */
2709 if (intel_syntax
&& i
.disp_operands
!= 0)
2712 if (flag_16bit_code
^ (i
.prefix
[ADDR_PREFIX
] != 0))
2714 i
.types
[this_operand
] |= bigdisp
;
2716 exp
= &disp_expressions
[i
.disp_operands
];
2717 i
.disps
[this_operand
] = exp
;
2718 i
.disp_reloc
[this_operand
] = NO_RELOC
;
2720 save_input_line_pointer
= input_line_pointer
;
2721 input_line_pointer
= disp_start
;
2722 END_STRING_AND_SAVE (disp_end
);
2724 #ifndef GCC_ASM_O_HACK
2725 #define GCC_ASM_O_HACK 0
2728 END_STRING_AND_SAVE (disp_end
+ 1);
2729 if ((i
.types
[this_operand
] & BaseIndex
) != 0
2730 && displacement_string_end
[-1] == '+')
2732 /* This hack is to avoid a warning when using the "o"
2733 constraint within gcc asm statements.
2736 #define _set_tssldt_desc(n,addr,limit,type) \
2737 __asm__ __volatile__ ( \
2739 "movw %w1,2+%0\n\t" \
2741 "movb %b1,4+%0\n\t" \
2742 "movb %4,5+%0\n\t" \
2743 "movb $0,6+%0\n\t" \
2744 "movb %h1,7+%0\n\t" \
2746 : "=o"(*(n)) : "q" (addr), "ri"(limit), "i"(type))
2748 This works great except that the output assembler ends
2749 up looking a bit weird if it turns out that there is
2750 no offset. You end up producing code that looks like:
2763 So here we provide the missing zero.
2766 *displacement_string_end
= '0';
2772 * We can have operands of the form
2773 * <symbol>@GOTOFF+<nnn>
2774 * Take the easy way out here and copy everything
2775 * into a temporary buffer...
2779 cp
= strchr (input_line_pointer
, '@');
2785 /* GOT relocations are not supported in 16 bit mode */
2786 if (flag_16bit_code
)
2787 as_bad (_("GOT relocations not supported in 16 bit mode"));
2789 if (GOT_symbol
== NULL
)
2790 GOT_symbol
= symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME
);
2792 if (strncmp (cp
+ 1, "PLT", 3) == 0)
2794 i
.disp_reloc
[this_operand
] = BFD_RELOC_386_PLT32
;
2797 else if (strncmp (cp
+ 1, "GOTOFF", 6) == 0)
2799 i
.disp_reloc
[this_operand
] = BFD_RELOC_386_GOTOFF
;
2802 else if (strncmp (cp
+ 1, "GOT", 3) == 0)
2804 i
.disp_reloc
[this_operand
] = BFD_RELOC_386_GOT32
;
2808 as_bad (_("Bad reloc specifier in expression"));
2810 /* Replace the relocation token with ' ', so that errors like
2811 foo@GOTOFF1 will be detected. */
2812 first
= cp
- input_line_pointer
;
2813 tmpbuf
= (char *) alloca (strlen(input_line_pointer
));
2814 memcpy (tmpbuf
, input_line_pointer
, first
);
2815 tmpbuf
[first
] = ' ';
2816 strcpy (tmpbuf
+ first
+ 1, cp
+ 1 + len
);
2817 input_line_pointer
= tmpbuf
;
2822 exp_seg
= expression (exp
);
2824 #ifdef BFD_ASSEMBLER
2825 /* We do this to make sure that the section symbol is in
2826 the symbol table. We will ultimately change the relocation
2827 to be relative to the beginning of the section */
2828 if (i
.disp_reloc
[this_operand
] == BFD_RELOC_386_GOTOFF
)
2830 if (S_IS_LOCAL(exp
->X_add_symbol
)
2831 && S_GET_SEGMENT (exp
->X_add_symbol
) != undefined_section
)
2832 section_symbol (S_GET_SEGMENT (exp
->X_add_symbol
));
2833 assert (exp
->X_op
== O_symbol
);
2834 exp
->X_op
= O_subtract
;
2835 exp
->X_op_symbol
= GOT_symbol
;
2836 i
.disp_reloc
[this_operand
] = BFD_RELOC_32
;
2841 if (*input_line_pointer
)
2842 as_bad (_("Ignoring junk `%s' after expression"),
2843 input_line_pointer
);
2845 RESTORE_END_STRING (disp_end
+ 1);
2847 RESTORE_END_STRING (disp_end
);
2848 input_line_pointer
= save_input_line_pointer
;
2850 if (exp
->X_op
== O_constant
)
2852 if (fits_in_signed_byte (exp
->X_add_number
))
2853 i
.types
[this_operand
] |= Disp8
;
2856 else if (exp_seg
!= text_section
2857 && exp_seg
!= data_section
2858 && exp_seg
!= bss_section
2859 && exp_seg
!= undefined_section
)
2861 as_bad (_ ("Unimplemented segment type %d in operand"), exp_seg
);
2868 static int i386_operand_modifier
PARAMS ((char **, int));
2871 i386_operand_modifier (op_string
, got_a_float
)
2875 if (!strncasecmp (*op_string
, "BYTE PTR", 8))
2877 i
.suffix
= BYTE_MNEM_SUFFIX
;
2882 else if (!strncasecmp (*op_string
, "WORD PTR", 8))
2884 i
.suffix
= WORD_MNEM_SUFFIX
;
2889 else if (!strncasecmp (*op_string
, "DWORD PTR", 9))
2892 i
.suffix
= SHORT_MNEM_SUFFIX
;
2894 i
.suffix
= DWORD_MNEM_SUFFIX
;
2899 else if (!strncasecmp (*op_string
, "QWORD PTR", 9))
2901 i
.suffix
= INTEL_DWORD_MNEM_SUFFIX
;
2906 else if (!strncasecmp (*op_string
, "XWORD PTR", 9))
2908 i
.suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
2913 else if (!strncasecmp (*op_string
, "SHORT", 5))
2919 else if (!strncasecmp (*op_string
, "OFFSET FLAT:", 12))
2925 else if (!strncasecmp (*op_string
, "FLAT", 4))
2931 else return NONE_FOUND
;
2934 static char * build_displacement_string
PARAMS ((int, char *));
2937 build_displacement_string (initial_disp
, op_string
)
2941 char *temp_string
= (char *) malloc (strlen (op_string
) + 1);
2942 char *end_of_operand_string
;
2946 temp_string
[0] = '\0';
2947 tc
= end_of_operand_string
= strchr (op_string
, '[');
2948 if ( initial_disp
&& !end_of_operand_string
)
2950 strcpy (temp_string
, op_string
);
2951 return (temp_string
);
2954 /* Build the whole displacement string */
2957 strncpy (temp_string
, op_string
, end_of_operand_string
- op_string
);
2958 temp_string
[end_of_operand_string
- op_string
] = '\0';
2962 temp_disp
= op_string
;
2964 while (*temp_disp
!= '\0')
2966 int add_minus
= (*temp_disp
== '-');
2968 if (*temp_disp
== '+' || *temp_disp
== '-' || *temp_disp
== '[')
2971 if (is_space_char (*temp_disp
))
2974 /* Don't consider registers */
2975 if (*temp_disp
!= REGISTER_PREFIX
2976 && !(allow_naked_reg
&& i386_is_reg (temp_disp
)))
2978 char *string_start
= temp_disp
;
2980 while (*temp_disp
!= ']'
2981 && *temp_disp
!= '+'
2982 && *temp_disp
!= '-'
2983 && *temp_disp
!= '*')
2987 strcat (temp_string
, "-");
2989 strcat (temp_string
, "+");
2991 strncat (temp_string
, string_start
, temp_disp
- string_start
);
2992 if (*temp_disp
== '+' || *temp_disp
== '-')
2996 while (*temp_disp
!= '\0'
2997 && *temp_disp
!= '+'
2998 && *temp_disp
!= '-')
3005 static int i386_parse_seg
PARAMS ((char *));
3008 i386_parse_seg (op_string
)
3011 if (is_space_char (*op_string
))
3014 /* Should be one of es, cs, ss, ds fs or gs */
3015 switch (*op_string
++)
3018 i
.seg
[i
.mem_operands
] = &es
;
3021 i
.seg
[i
.mem_operands
] = &cs
;
3024 i
.seg
[i
.mem_operands
] = &ss
;
3027 i
.seg
[i
.mem_operands
] = &ds
;
3030 i
.seg
[i
.mem_operands
] = &fs
;
3033 i
.seg
[i
.mem_operands
] = &gs
;
3036 as_bad (_("bad segment name `%s'"), op_string
);
3040 if (*op_string
++ != 's')
3042 as_bad (_("bad segment name `%s'"), op_string
);
3046 if (is_space_char (*op_string
))
3049 if (*op_string
!= ':')
3051 as_bad (_("bad segment name `%s'"), op_string
);
3059 static int i386_intel_memory_operand
PARAMS ((char *));
3062 i386_intel_memory_operand (op_string
)
3066 char *end_of_operand_string
;
3068 if (is_digit_char (*op_string
)
3069 && strchr (op_string
, '[') == 0)
3071 if (!i386_immediate (op_string
))
3077 /* Look for displacement preceding open bracket */
3078 if (*op_string
!= '[')
3083 end_seg
= strchr (op_string
, ':');
3086 if (!i386_parse_seg (op_string
))
3088 op_string
= end_seg
+ 1;
3091 temp_string
= build_displacement_string (true, op_string
);
3092 if (!i386_displacement (temp_string
, temp_string
+ strlen (temp_string
)))
3095 end_of_operand_string
= strchr (op_string
, '[');
3096 if (!end_of_operand_string
)
3097 end_of_operand_string
= op_string
+ strlen (op_string
);
3099 if (is_space_char (*end_of_operand_string
))
3100 --end_of_operand_string
;
3102 op_string
= end_of_operand_string
;
3105 if (*op_string
== '[')
3109 /* Pick off each component and figure out where it belongs */
3111 end_of_operand_string
= op_string
;
3113 while (*op_string
!= ']')
3116 while (*end_of_operand_string
!= '+'
3117 && *end_of_operand_string
!= '-'
3118 && *end_of_operand_string
!= '*'
3119 && *end_of_operand_string
!= ']')
3120 end_of_operand_string
++;
3122 if (*op_string
== '+')
3124 char *temp_string
= op_string
+ 1;
3125 if (is_space_char (*temp_string
))
3127 if (*temp_string
== REGISTER_PREFIX
3128 || (allow_naked_reg
&& i386_is_reg (temp_string
)))
3132 if (*op_string
== REGISTER_PREFIX
3133 || (allow_naked_reg
&& i386_is_reg (op_string
)))
3135 const reg_entry
*temp_reg
;
3138 END_STRING_AND_SAVE (end_of_operand_string
);
3139 temp_reg
= parse_register (op_string
, &end_op
);
3140 RESTORE_END_STRING (end_of_operand_string
);
3142 if (temp_reg
== NULL
)
3145 if (i
.base_reg
== NULL
)
3146 i
.base_reg
= temp_reg
;
3148 i
.index_reg
= temp_reg
;
3150 i
.types
[this_operand
] |= BaseIndex
;
3153 else if (is_digit_char (*op_string
) || *op_string
== '+' || *op_string
== '-')
3156 char *temp_string
= build_displacement_string (false, op_string
);
3158 if (*temp_string
== '+')
3161 if (!i386_displacement (temp_string
, temp_string
+ strlen (temp_string
)))
3165 end_of_operand_string
= op_string
;
3166 while (*end_of_operand_string
!= ']'
3167 && *end_of_operand_string
!= '+'
3168 && *end_of_operand_string
!= '-'
3169 && *end_of_operand_string
!= '*')
3170 ++end_of_operand_string
;
3172 else if (*op_string
== '*')
3176 if (i
.base_reg
&& !i
.index_reg
)
3178 i
.index_reg
= i
.base_reg
;
3182 if (!i386_scale (op_string
))
3185 op_string
= end_of_operand_string
;
3186 ++end_of_operand_string
;
3193 static int i386_intel_operand
PARAMS ((char *, int));
3196 i386_intel_operand (operand_string
, got_a_float
)
3197 char *operand_string
;
3200 char *op_string
= operand_string
;
3202 int operand_modifier
= i386_operand_modifier (&op_string
, got_a_float
);
3203 if (is_space_char (*op_string
))
3206 switch (operand_modifier
)
3213 if ((i
.mem_operands
== 1
3214 && (current_templates
->start
->opcode_modifier
& IsString
) == 0)
3215 || i
.mem_operands
== 2)
3217 as_bad (_("too many memory references for `%s'"),
3218 current_templates
->start
->name
);
3222 if (!i386_intel_memory_operand (op_string
))
3231 if (!i386_immediate (op_string
))
3238 /* Should be register or immediate */
3239 if (is_digit_char (*op_string
)
3240 && strchr (op_string
, '[') == 0)
3242 if (!i386_immediate (op_string
))
3245 else if (*op_string
== REGISTER_PREFIX
3247 && i386_is_reg (op_string
)))
3250 register const reg_entry
* r
;
3253 r
= parse_register (op_string
, &end_op
);
3257 /* Check for a segment override by searching for ':' after a
3258 segment register. */
3260 if (is_space_char (*op_string
))
3262 if (*op_string
== ':' && (r
->reg_type
& (SReg2
| SReg3
)))
3267 i
.seg
[i
.mem_operands
] = &es
;
3270 i
.seg
[i
.mem_operands
] = &cs
;
3273 i
.seg
[i
.mem_operands
] = &ss
;
3276 i
.seg
[i
.mem_operands
] = &ds
;
3279 i
.seg
[i
.mem_operands
] = &fs
;
3282 i
.seg
[i
.mem_operands
] = &gs
;
3287 i
.types
[this_operand
] |= r
->reg_type
& ~BaseIndex
;
3288 i
.regs
[this_operand
] = r
;
3295 if (!i386_intel_memory_operand (op_string
))
3303 /* Special case for (%dx) while doing input/output op. */
3305 && i
.base_reg
->reg_type
== (Reg16
| InOutPortReg
)
3307 && i
.log2_scale_factor
== 0
3308 && i
.seg
[i
.mem_operands
] == 0
3309 && (i
.types
[this_operand
] & Disp
) == 0)
3311 i
.types
[this_operand
] = InOutPortReg
;
3314 /* Make sure the memory operand we've been dealt is valid. */
3315 if (flag_16bit_code
^ (i
.prefix
[ADDR_PREFIX
] != 0))
3318 && ((i
.base_reg
->reg_type
& (Reg16
|BaseIndex
))
3319 != (Reg16
|BaseIndex
)))
3321 && (((i
.index_reg
->reg_type
& (Reg16
|BaseIndex
))
3322 != (Reg16
|BaseIndex
))
3324 && i
.base_reg
->reg_num
< 6
3325 && i
.index_reg
->reg_num
>= 6
3326 && i
.log2_scale_factor
== 0))))
3328 as_bad (_("`%s' is not a valid %s bit base/index expression"),
3329 operand_string
, "16");
3336 && (i
.base_reg
->reg_type
& Reg32
) == 0)
3338 && ((i
.index_reg
->reg_type
& (Reg32
|BaseIndex
))
3339 != (Reg32
|BaseIndex
))))
3341 as_bad (_("`%s' is not a valid %s bit base/index expression"),
3342 operand_string
, "32");
3349 /* Parse OPERAND_STRING into the i386_insn structure I. Returns non-zero
3352 static int i386_operand
PARAMS ((char *));
3355 i386_operand (operand_string
)
3356 char *operand_string
;
3358 char *op_string
= operand_string
;
3360 if (is_space_char (*op_string
))
3363 /* We check for an absolute prefix (differentiating,
3364 for example, 'jmp pc_relative_label' from 'jmp *absolute_label'. */
3365 if (*op_string
== ABSOLUTE_PREFIX
)
3368 if (is_space_char (*op_string
))
3370 i
.types
[this_operand
] |= JumpAbsolute
;
3373 /* Check if operand is a register. */
3374 if (*op_string
== REGISTER_PREFIX
3375 || (allow_naked_reg
&& i386_is_reg (op_string
)))
3377 register const reg_entry
*r
;
3380 r
= parse_register (op_string
, &end_op
);
3384 /* Check for a segment override by searching for ':' after a
3385 segment register. */
3387 if (is_space_char (*op_string
))
3389 if (*op_string
== ':' && (r
->reg_type
& (SReg2
| SReg3
)))
3394 i
.seg
[i
.mem_operands
] = &es
;
3397 i
.seg
[i
.mem_operands
] = &cs
;
3400 i
.seg
[i
.mem_operands
] = &ss
;
3403 i
.seg
[i
.mem_operands
] = &ds
;
3406 i
.seg
[i
.mem_operands
] = &fs
;
3409 i
.seg
[i
.mem_operands
] = &gs
;
3413 /* Skip the ':' and whitespace. */
3415 if (is_space_char (*op_string
))
3418 /* Pretend given string starts here. */
3419 operand_string
= op_string
;
3420 if (!is_digit_char (*op_string
)
3421 && !is_identifier_char (*op_string
)
3422 && *op_string
!= '('
3423 && *op_string
!= ABSOLUTE_PREFIX
)
3425 as_bad (_("bad memory operand `%s'"), op_string
);
3428 /* Handle case of %es:*foo. */
3429 if (*op_string
== ABSOLUTE_PREFIX
)
3432 if (is_space_char (*op_string
))
3434 i
.types
[this_operand
] |= JumpAbsolute
;
3436 goto do_memory_reference
;
3440 as_bad (_("Junk `%s' after register"), op_string
);
3443 i
.types
[this_operand
] |= r
->reg_type
& ~BaseIndex
;
3444 i
.regs
[this_operand
] = r
;
3447 else if (*op_string
== IMMEDIATE_PREFIX
)
3448 { /* ... or an immediate */
3450 if (!i386_immediate (op_string
))
3453 else if (is_digit_char (*op_string
)
3454 || is_identifier_char (*op_string
)
3455 || *op_string
== '(' )
3457 /* This is a memory reference of some sort. */
3458 char *end_of_operand_string
;
3459 register char *base_string
;
3460 int found_base_index_form
;
3462 /* Start and end of displacement string expression (if found). */
3463 char *displacement_string_start
;
3464 char *displacement_string_end
;
3466 do_memory_reference
:
3468 if ((i
.mem_operands
== 1
3469 && (current_templates
->start
->opcode_modifier
& IsString
) == 0)
3470 || i
.mem_operands
== 2)
3472 as_bad (_("too many memory references for `%s'"),
3473 current_templates
->start
->name
);
3477 /* Check for base index form. We detect the base index form by
3478 looking for an ')' at the end of the operand, searching
3479 for the '(' matching it, and finding a REGISTER_PREFIX or ','
3481 found_base_index_form
= 0;
3482 end_of_operand_string
= op_string
+ strlen (op_string
);
3484 --end_of_operand_string
;
3485 if (is_space_char (*end_of_operand_string
))
3486 --end_of_operand_string
;
3488 base_string
= end_of_operand_string
;
3490 if (*base_string
== ')')
3492 unsigned int parens_balanced
= 1;
3493 /* We've already checked that the number of left & right ()'s are
3494 equal, so this loop will not be infinite. */
3498 if (*base_string
== ')')
3500 if (*base_string
== '(')
3503 while (parens_balanced
);
3505 /* If there is a displacement set-up for it to be parsed later. */
3506 displacement_string_start
= op_string
;
3507 displacement_string_end
= base_string
;
3509 /* Skip past '(' and whitespace. */
3511 if (is_space_char (*base_string
))
3514 if (*base_string
== REGISTER_PREFIX
3515 || (allow_naked_reg
&& i386_is_reg (base_string
))
3516 || *base_string
== ',')
3517 found_base_index_form
= 1;
3520 /* If we can't parse a base index register expression, we've found
3521 a pure displacement expression. We set up displacement_string_start
3522 and displacement_string_end for the code below. */
3523 if (!found_base_index_form
)
3525 displacement_string_start
= op_string
;
3526 displacement_string_end
= end_of_operand_string
+ 1;
3530 i
.types
[this_operand
] |= BaseIndex
;
3532 /* Find base register (if any). */
3533 if (*base_string
!= ',')
3537 /* Trim off the closing ')' so that parse_register won't
3539 END_STRING_AND_SAVE (end_of_operand_string
);
3540 i
.base_reg
= parse_register (base_string
, &end_op
);
3541 RESTORE_END_STRING (end_of_operand_string
);
3543 if (i
.base_reg
== NULL
)
3546 base_string
= end_op
;
3547 if (is_space_char (*base_string
))
3551 /* There may be an index reg or scale factor here. */
3552 if (*base_string
== ',')
3555 if (is_space_char (*base_string
))
3558 if (*base_string
== REGISTER_PREFIX
3559 || (allow_naked_reg
&& i386_is_reg (base_string
)))
3563 END_STRING_AND_SAVE (end_of_operand_string
);
3564 i
.index_reg
= parse_register (base_string
, &end_op
);
3565 RESTORE_END_STRING (end_of_operand_string
);
3567 if (i
.index_reg
== NULL
)
3570 base_string
= end_op
;
3571 if (is_space_char (*base_string
))
3573 if (*base_string
== ',')
3576 if (is_space_char (*base_string
))
3579 else if (*base_string
!= ')' )
3581 as_bad (_("expecting `,' or `)' after index register in `%s'"),
3587 /* Check for scale factor. */
3588 if (isdigit ((unsigned char) *base_string
))
3590 if (!i386_scale (base_string
))
3594 if (is_space_char (*base_string
))
3596 if (*base_string
!= ')')
3598 as_bad (_("expecting `)' after scale factor in `%s'"),
3603 else if (!i
.index_reg
)
3605 as_bad (_("expecting index register or scale factor after `,'; got '%c'"),
3610 else if (*base_string
!= ')')
3612 as_bad (_("expecting `,' or `)' after base register in `%s'"),
3618 /* If there's an expression beginning the operand, parse it,
3619 assuming displacement_string_start and
3620 displacement_string_end are meaningful. */
3621 if (displacement_string_start
!= displacement_string_end
)
3623 if (!i386_displacement (displacement_string_start
,
3624 displacement_string_end
))
3628 /* Special case for (%dx) while doing input/output op. */
3630 && i
.base_reg
->reg_type
== (Reg16
| InOutPortReg
)
3632 && i
.log2_scale_factor
== 0
3633 && i
.seg
[i
.mem_operands
] == 0
3634 && (i
.types
[this_operand
] & Disp
) == 0)
3636 i
.types
[this_operand
] = InOutPortReg
;
3639 /* Make sure the memory operand we've been dealt is valid. */
3640 if (flag_16bit_code
^ (i
.prefix
[ADDR_PREFIX
] != 0))
3643 && ((i
.base_reg
->reg_type
& (Reg16
|BaseIndex
))
3644 != (Reg16
|BaseIndex
)))
3646 && (((i
.index_reg
->reg_type
& (Reg16
|BaseIndex
))
3647 != (Reg16
|BaseIndex
))
3649 && i
.base_reg
->reg_num
< 6
3650 && i
.index_reg
->reg_num
>= 6
3651 && i
.log2_scale_factor
== 0))))
3653 as_bad (_("`%s' is not a valid %s bit base/index expression"),
3654 operand_string
, "16");
3661 && (i
.base_reg
->reg_type
& Reg32
) == 0)
3663 && ((i
.index_reg
->reg_type
& (Reg32
|BaseIndex
))
3664 != (Reg32
|BaseIndex
))))
3666 as_bad (_("`%s' is not a valid %s bit base/index expression"),
3667 operand_string
, "32");
3674 { /* it's not a memory operand; argh! */
3675 as_bad (_("invalid char %s beginning operand %d `%s'"),
3676 output_invalid (*op_string
),
3681 return 1; /* normal return */
3685 * md_estimate_size_before_relax()
3687 * Called just before relax().
3688 * Any symbol that is now undefined will not become defined.
3689 * Return the correct fr_subtype in the frag.
3690 * Return the initial "guess for fr_var" to caller.
3691 * The guess for fr_var is ACTUALLY the growth beyond fr_fix.
3692 * Whatever we do to grow fr_fix or fr_var contributes to our returned value.
3693 * Although it may not be explicit in the frag, pretend fr_var starts with a
3697 md_estimate_size_before_relax (fragP
, segment
)
3698 register fragS
*fragP
;
3699 register segT segment
;
3701 register unsigned char *opcode
;
3702 register int old_fr_fix
;
3704 old_fr_fix
= fragP
->fr_fix
;
3705 opcode
= (unsigned char *) fragP
->fr_opcode
;
3706 /* We've already got fragP->fr_subtype right; all we have to do is
3707 check for un-relaxable symbols. */
3708 if (S_GET_SEGMENT (fragP
->fr_symbol
) != segment
)
3710 /* symbol is undefined in this segment */
3711 int code16
= fragP
->fr_subtype
& CODE16
;
3712 int size
= code16
? 2 : 4;
3713 int pcrel_reloc
= code16
? BFD_RELOC_16_PCREL
: BFD_RELOC_32_PCREL
;
3717 case JUMP_PC_RELATIVE
: /* make jmp (0xeb) a dword displacement jump */
3718 opcode
[0] = 0xe9; /* dword disp jmp */
3719 fragP
->fr_fix
+= size
;
3720 fix_new (fragP
, old_fr_fix
, size
,
3722 fragP
->fr_offset
, 1,
3723 (GOT_symbol
&& /* Not quite right - we should switch on
3724 presence of @PLT, but I cannot see how
3725 to get to that from here. We should have
3726 done this in md_assemble to really
3727 get it right all of the time, but I
3728 think it does not matter that much, as
3729 this will be right most of the time. ERY*/
3730 S_GET_SEGMENT(fragP
->fr_symbol
) == undefined_section
)
3731 ? BFD_RELOC_386_PLT32
: pcrel_reloc
);
3735 /* This changes the byte-displacement jump 0x7N -->
3736 the dword-displacement jump 0x0f8N */
3737 opcode
[1] = opcode
[0] + 0x10;
3738 opcode
[0] = TWO_BYTE_OPCODE_ESCAPE
; /* two-byte escape */
3739 fragP
->fr_fix
+= 1 + size
; /* we've added an opcode byte */
3740 fix_new (fragP
, old_fr_fix
+ 1, size
,
3742 fragP
->fr_offset
, 1,
3743 (GOT_symbol
&& /* Not quite right - we should switch on
3744 presence of @PLT, but I cannot see how
3745 to get to that from here. ERY */
3746 S_GET_SEGMENT(fragP
->fr_symbol
) == undefined_section
)
3747 ? BFD_RELOC_386_PLT32
: pcrel_reloc
);
3752 return (fragP
->fr_var
+ fragP
->fr_fix
- old_fr_fix
);
3753 } /* md_estimate_size_before_relax() */
3756 * md_convert_frag();
3758 * Called after relax() is finished.
3759 * In: Address of frag.
3760 * fr_type == rs_machine_dependent.
3761 * fr_subtype is what the address relaxed to.
3763 * Out: Any fixSs and constants are set up.
3764 * Caller will turn frag into a ".space 0".
3766 #ifndef BFD_ASSEMBLER
3768 md_convert_frag (headers
, sec
, fragP
)
3769 object_headers
*headers
;
3771 register fragS
*fragP
;
3774 md_convert_frag (abfd
, sec
, fragP
)
3777 register fragS
*fragP
;
3780 register unsigned char *opcode
;
3781 unsigned char *where_to_put_displacement
= NULL
;
3782 unsigned int target_address
;
3783 unsigned int opcode_address
;
3784 unsigned int extension
= 0;
3785 int displacement_from_opcode_start
;
3787 opcode
= (unsigned char *) fragP
->fr_opcode
;
3789 /* Address we want to reach in file space. */
3790 target_address
= S_GET_VALUE (fragP
->fr_symbol
) + fragP
->fr_offset
;
3791 #ifdef BFD_ASSEMBLER /* not needed otherwise? */
3792 target_address
+= symbol_get_frag (fragP
->fr_symbol
)->fr_address
;
3795 /* Address opcode resides at in file space. */
3796 opcode_address
= fragP
->fr_address
+ fragP
->fr_fix
;
3798 /* Displacement from opcode start to fill into instruction. */
3799 displacement_from_opcode_start
= target_address
- opcode_address
;
3801 switch (fragP
->fr_subtype
)
3803 case ENCODE_RELAX_STATE (COND_JUMP
, SMALL
):
3804 case ENCODE_RELAX_STATE (COND_JUMP
, SMALL16
):
3805 case ENCODE_RELAX_STATE (UNCOND_JUMP
, SMALL
):
3806 case ENCODE_RELAX_STATE (UNCOND_JUMP
, SMALL16
):
3807 /* don't have to change opcode */
3808 extension
= 1; /* 1 opcode + 1 displacement */
3809 where_to_put_displacement
= &opcode
[1];
3812 case ENCODE_RELAX_STATE (COND_JUMP
, BIG
):
3813 extension
= 5; /* 2 opcode + 4 displacement */
3814 opcode
[1] = opcode
[0] + 0x10;
3815 opcode
[0] = TWO_BYTE_OPCODE_ESCAPE
;
3816 where_to_put_displacement
= &opcode
[2];
3819 case ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG
):
3820 extension
= 4; /* 1 opcode + 4 displacement */
3822 where_to_put_displacement
= &opcode
[1];
3825 case ENCODE_RELAX_STATE (COND_JUMP
, BIG16
):
3826 extension
= 3; /* 2 opcode + 2 displacement */
3827 opcode
[1] = opcode
[0] + 0x10;
3828 opcode
[0] = TWO_BYTE_OPCODE_ESCAPE
;
3829 where_to_put_displacement
= &opcode
[2];
3832 case ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG16
):
3833 extension
= 2; /* 1 opcode + 2 displacement */
3835 where_to_put_displacement
= &opcode
[1];
3839 BAD_CASE (fragP
->fr_subtype
);
3842 /* now put displacement after opcode */
3843 md_number_to_chars ((char *) where_to_put_displacement
,
3844 (valueT
) (displacement_from_opcode_start
- extension
),
3845 SIZE_FROM_RELAX_STATE (fragP
->fr_subtype
));
3846 fragP
->fr_fix
+= extension
;
3850 int md_short_jump_size
= 2; /* size of byte displacement jmp */
3851 int md_long_jump_size
= 5; /* size of dword displacement jmp */
3852 const int md_reloc_size
= 8; /* Size of relocation record */
3855 md_create_short_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
3857 addressT from_addr
, to_addr
;
3863 offset
= to_addr
- (from_addr
+ 2);
3864 md_number_to_chars (ptr
, (valueT
) 0xeb, 1); /* opcode for byte-disp jump */
3865 md_number_to_chars (ptr
+ 1, (valueT
) offset
, 1);
3869 md_create_long_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
3871 addressT from_addr
, to_addr
;
3877 if (flag_do_long_jump
)
3879 offset
= to_addr
- S_GET_VALUE (to_symbol
);
3880 md_number_to_chars (ptr
, (valueT
) 0xe9, 1);/* opcode for long jmp */
3881 md_number_to_chars (ptr
+ 1, (valueT
) offset
, 4);
3882 fix_new (frag
, (ptr
+ 1) - frag
->fr_literal
, 4,
3883 to_symbol
, (offsetT
) 0, 0, BFD_RELOC_32
);
3887 offset
= to_addr
- (from_addr
+ 5);
3888 md_number_to_chars (ptr
, (valueT
) 0xe9, 1);
3889 md_number_to_chars (ptr
+ 1, (valueT
) offset
, 4);
3893 /* Apply a fixup (fixS) to segment data, once it has been determined
3894 by our caller that we have all the info we need to fix it up.
3896 On the 386, immediates, displacements, and data pointers are all in
3897 the same (little-endian) format, so we don't need to care about which
3901 md_apply_fix3 (fixP
, valp
, seg
)
3902 fixS
*fixP
; /* The fix we're to put in. */
3903 valueT
*valp
; /* Pointer to the value of the bits. */
3904 segT seg
; /* Segment fix is from. */
3906 register char *p
= fixP
->fx_where
+ fixP
->fx_frag
->fr_literal
;
3907 valueT value
= *valp
;
3909 #if defined (BFD_ASSEMBLER) && !defined (TE_Mach)
3912 switch (fixP
->fx_r_type
)
3918 fixP
->fx_r_type
= BFD_RELOC_32_PCREL
;
3921 fixP
->fx_r_type
= BFD_RELOC_16_PCREL
;
3924 fixP
->fx_r_type
= BFD_RELOC_8_PCREL
;
3930 * This is a hack. There should be a better way to
3933 if ((fixP
->fx_r_type
== BFD_RELOC_32_PCREL
3934 || fixP
->fx_r_type
== BFD_RELOC_16_PCREL
3935 || fixP
->fx_r_type
== BFD_RELOC_8_PCREL
)
3939 if (OUTPUT_FLAVOR
== bfd_target_elf_flavour
3941 || OUTPUT_FLAVOR
== bfd_target_coff_flavour
3944 value
+= fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
3946 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3947 if (OUTPUT_FLAVOR
== bfd_target_elf_flavour
3948 && (S_GET_SEGMENT (fixP
->fx_addsy
) == seg
3949 || symbol_section_p (fixP
->fx_addsy
))
3950 && ! S_IS_EXTERNAL (fixP
->fx_addsy
)
3951 && ! S_IS_WEAK (fixP
->fx_addsy
)
3952 && S_IS_DEFINED (fixP
->fx_addsy
)
3953 && ! S_IS_COMMON (fixP
->fx_addsy
))
3955 /* Yes, we add the values in twice. This is because
3956 bfd_perform_relocation subtracts them out again. I think
3957 bfd_perform_relocation is broken, but I don't dare change
3959 value
+= fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
3962 #if defined (OBJ_COFF) && defined (TE_PE)
3963 /* For some reason, the PE format does not store a section
3964 address offset for a PC relative symbol. */
3965 if (S_GET_SEGMENT (fixP
->fx_addsy
) != seg
)
3966 value
+= md_pcrel_from (fixP
);
3970 /* Fix a few things - the dynamic linker expects certain values here,
3971 and we must not dissappoint it. */
3972 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3973 if (OUTPUT_FLAVOR
== bfd_target_elf_flavour
3975 switch (fixP
->fx_r_type
) {
3976 case BFD_RELOC_386_PLT32
:
3977 /* Make the jump instruction point to the address of the operand. At
3978 runtime we merely add the offset to the actual PLT entry. */
3981 case BFD_RELOC_386_GOTPC
:
3983 * This is tough to explain. We end up with this one if we have
3984 * operands that look like "_GLOBAL_OFFSET_TABLE_+[.-.L284]". The goal
3985 * here is to obtain the absolute address of the GOT, and it is strongly
3986 * preferable from a performance point of view to avoid using a runtime
3987 * relocation for this. The actual sequence of instructions often look
3993 * addl $_GLOBAL_OFFSET_TABLE_+[.-.L66],%ebx
3995 * The call and pop essentially return the absolute address of
3996 * the label .L66 and store it in %ebx. The linker itself will
3997 * ultimately change the first operand of the addl so that %ebx points to
3998 * the GOT, but to keep things simple, the .o file must have this operand
3999 * set so that it generates not the absolute address of .L66, but the
4000 * absolute address of itself. This allows the linker itself simply
4001 * treat a GOTPC relocation as asking for a pcrel offset to the GOT to be
4002 * added in, and the addend of the relocation is stored in the operand
4003 * field for the instruction itself.
4005 * Our job here is to fix the operand so that it would add the correct
4006 * offset so that %ebx would point to itself. The thing that is tricky is
4007 * that .-.L66 will point to the beginning of the instruction, so we need
4008 * to further modify the operand so that it will point to itself.
4009 * There are other cases where you have something like:
4011 * .long $_GLOBAL_OFFSET_TABLE_+[.-.L66]
4013 * and here no correction would be required. Internally in the assembler
4014 * we treat operands of this form as not being pcrel since the '.' is
4015 * explicitly mentioned, and I wonder whether it would simplify matters
4016 * to do it this way. Who knows. In earlier versions of the PIC patches,
4017 * the pcrel_adjust field was used to store the correction, but since the
4018 * expression is not pcrel, I felt it would be confusing to do it this way.
4022 case BFD_RELOC_386_GOT32
:
4023 value
= 0; /* Fully resolved at runtime. No addend. */
4025 case BFD_RELOC_386_GOTOFF
:
4028 case BFD_RELOC_VTABLE_INHERIT
:
4029 case BFD_RELOC_VTABLE_ENTRY
:
4036 #endif /* defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) */
4038 #endif /* defined (BFD_ASSEMBLER) && !defined (TE_Mach) */
4039 md_number_to_chars (p
, value
, fixP
->fx_size
);
4045 /* This is never used. */
4046 long /* Knows about the byte order in a word. */
4047 md_chars_to_number (con
, nbytes
)
4048 unsigned char con
[]; /* Low order byte 1st. */
4049 int nbytes
; /* Number of bytes in the input. */
4052 for (retval
= 0, con
+= nbytes
- 1; nbytes
--; con
--)
4054 retval
<<= BITS_PER_CHAR
;
4062 #define MAX_LITTLENUMS 6
4064 /* Turn the string pointed to by litP into a floating point constant of type
4065 type, and emit the appropriate bytes. The number of LITTLENUMS emitted
4066 is stored in *sizeP . An error message is returned, or NULL on OK. */
4068 md_atof (type
, litP
, sizeP
)
4074 LITTLENUM_TYPE words
[MAX_LITTLENUMS
];
4075 LITTLENUM_TYPE
*wordP
;
4097 return _("Bad call to md_atof ()");
4099 t
= atof_ieee (input_line_pointer
, type
, words
);
4101 input_line_pointer
= t
;
4103 *sizeP
= prec
* sizeof (LITTLENUM_TYPE
);
4104 /* This loops outputs the LITTLENUMs in REVERSE order; in accord with
4105 the bigendian 386. */
4106 for (wordP
= words
+ prec
- 1; prec
--;)
4108 md_number_to_chars (litP
, (valueT
) (*wordP
--), sizeof (LITTLENUM_TYPE
));
4109 litP
+= sizeof (LITTLENUM_TYPE
);
4114 char output_invalid_buf
[8];
4116 static char * output_invalid
PARAMS ((int));
4123 sprintf (output_invalid_buf
, "'%c'", c
);
4125 sprintf (output_invalid_buf
, "(0x%x)", (unsigned) c
);
4126 return output_invalid_buf
;
4129 /* REG_STRING starts *before* REGISTER_PREFIX. */
4131 static const reg_entry
* parse_register
PARAMS ((char *, char **));
4133 static const reg_entry
*
4134 parse_register (reg_string
, end_op
)
4138 register char *s
= reg_string
;
4140 char reg_name_given
[MAX_REG_NAME_SIZE
+ 1];
4143 /* Skip possible REGISTER_PREFIX and possible whitespace. */
4144 if (*s
== REGISTER_PREFIX
)
4147 if (is_space_char (*s
))
4151 while ((*p
++ = register_chars
[(unsigned char) *s
++]) != '\0')
4153 if (p
>= reg_name_given
+ MAX_REG_NAME_SIZE
)
4155 if (!allow_naked_reg
)
4158 as_bad (_("bad register name `%s'"), reg_name_given
);
4160 return (const reg_entry
*) NULL
;
4166 r
= (const reg_entry
*) hash_find (reg_hash
, reg_name_given
);
4170 if (!allow_naked_reg
)
4171 as_bad (_("bad register name `%s'"), reg_name_given
);
4172 return (const reg_entry
*) NULL
;
4179 CONST
char *md_shortopts
= "kmVQ:";
4181 CONST
char *md_shortopts
= "m";
4183 struct option md_longopts
[] = {
4184 {NULL
, no_argument
, NULL
, 0}
4186 size_t md_longopts_size
= sizeof (md_longopts
);
4189 md_parse_option (c
, arg
)
4196 flag_do_long_jump
= 1;
4199 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
4200 /* -k: Ignore for FreeBSD compatibility. */
4204 /* -V: SVR4 argument to print version ID. */
4206 print_version_id ();
4209 /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section
4210 should be emitted or not. FIXME: Not implemented. */
4222 md_show_usage (stream
)
4225 fprintf (stream
, _("\
4226 -m do long jump\n"));
4229 #ifdef BFD_ASSEMBLER
4230 #ifdef OBJ_MAYBE_ELF
4231 #ifdef OBJ_MAYBE_COFF
4233 /* Pick the target format to use. */
4236 i386_target_format ()
4238 switch (OUTPUT_FLAVOR
)
4240 case bfd_target_coff_flavour
:
4242 case bfd_target_elf_flavour
:
4243 return "elf32-i386";
4250 #endif /* OBJ_MAYBE_COFF */
4251 #endif /* OBJ_MAYBE_ELF */
4252 #endif /* BFD_ASSEMBLER */
4256 md_undefined_symbol (name
)
4259 if (*name
== '_' && *(name
+1) == 'G'
4260 && strcmp(name
, GLOBAL_OFFSET_TABLE_NAME
) == 0)
4264 if (symbol_find (name
))
4265 as_bad (_("GOT already in symbol table"));
4266 GOT_symbol
= symbol_new (name
, undefined_section
,
4267 (valueT
) 0, &zero_address_frag
);
4274 /* Round up a section size to the appropriate boundary. */
4276 md_section_align (segment
, size
)
4281 #ifdef BFD_ASSEMBLER
4282 /* For a.out, force the section size to be aligned. If we don't do
4283 this, BFD will align it for us, but it will not write out the
4284 final bytes of the section. This may be a bug in BFD, but it is
4285 easier to fix it here since that is how the other a.out targets
4289 align
= bfd_get_section_alignment (stdoutput
, segment
);
4290 size
= ((size
+ (1 << align
) - 1) & ((valueT
) -1 << align
));
4297 /* On the i386, PC-relative offsets are relative to the start of the
4298 next instruction. That is, the address of the offset, plus its
4299 size, since the offset is always the last part of the insn. */
4302 md_pcrel_from (fixP
)
4305 return fixP
->fx_size
+ fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
4316 temp
= get_absolute_expression ();
4317 subseg_set (bss_section
, (subsegT
) temp
);
4318 demand_empty_rest_of_line ();
4324 #ifdef BFD_ASSEMBLER
4327 i386_validate_fix (fixp
)
4330 if (fixp
->fx_subsy
&& fixp
->fx_subsy
== GOT_symbol
)
4332 fixp
->fx_r_type
= BFD_RELOC_386_GOTOFF
;
4338 tc_gen_reloc (section
, fixp
)
4343 bfd_reloc_code_real_type code
;
4345 switch (fixp
->fx_r_type
)
4347 case BFD_RELOC_386_PLT32
:
4348 case BFD_RELOC_386_GOT32
:
4349 case BFD_RELOC_386_GOTOFF
:
4350 case BFD_RELOC_386_GOTPC
:
4352 case BFD_RELOC_VTABLE_ENTRY
:
4353 case BFD_RELOC_VTABLE_INHERIT
:
4354 code
= fixp
->fx_r_type
;
4359 switch (fixp
->fx_size
)
4362 as_bad (_("Can not do %d byte pc-relative relocation"),
4364 code
= BFD_RELOC_32_PCREL
;
4366 case 1: code
= BFD_RELOC_8_PCREL
; break;
4367 case 2: code
= BFD_RELOC_16_PCREL
; break;
4368 case 4: code
= BFD_RELOC_32_PCREL
; break;
4373 switch (fixp
->fx_size
)
4376 as_bad (_("Can not do %d byte relocation"), fixp
->fx_size
);
4377 code
= BFD_RELOC_32
;
4379 case 1: code
= BFD_RELOC_8
; break;
4380 case 2: code
= BFD_RELOC_16
; break;
4381 case 4: code
= BFD_RELOC_32
; break;
4387 if (code
== BFD_RELOC_32
4389 && fixp
->fx_addsy
== GOT_symbol
)
4390 code
= BFD_RELOC_386_GOTPC
;
4392 rel
= (arelent
*) xmalloc (sizeof (arelent
));
4393 rel
->sym_ptr_ptr
= (asymbol
**) xmalloc (sizeof (asymbol
*));
4394 *rel
->sym_ptr_ptr
= symbol_get_bfdsym (fixp
->fx_addsy
);
4396 rel
->address
= fixp
->fx_frag
->fr_address
+ fixp
->fx_where
;
4397 /* HACK: Since i386 ELF uses Rel instead of Rela, encode the
4398 vtable entry to be used in the relocation's section offset. */
4399 if (fixp
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)
4400 rel
->address
= fixp
->fx_offset
;
4403 rel
->addend
= fixp
->fx_addnumber
;
4407 rel
->howto
= bfd_reloc_type_lookup (stdoutput
, code
);
4408 if (rel
->howto
== NULL
)
4410 as_bad_where (fixp
->fx_file
, fixp
->fx_line
,
4411 _("Cannot represent relocation type %s"),
4412 bfd_get_reloc_code_name (code
));
4413 /* Set howto to a garbage value so that we can keep going. */
4414 rel
->howto
= bfd_reloc_type_lookup (stdoutput
, BFD_RELOC_32
);
4415 assert (rel
->howto
!= NULL
);
4421 #else /* ! BFD_ASSEMBLER */
4423 #if (defined(OBJ_AOUT) | defined(OBJ_BOUT))
4425 tc_aout_fix_to_chars (where
, fixP
, segment_address_in_file
)
4428 relax_addressT segment_address_in_file
;
4431 * In: length of relocation (or of address) in chars: 1, 2 or 4.
4432 * Out: GNU LD relocation length code: 0, 1, or 2.
4435 static const unsigned char nbytes_r_length
[] = {42, 0, 1, 42, 2};
4438 know (fixP
->fx_addsy
!= NULL
);
4440 md_number_to_chars (where
,
4441 (valueT
) (fixP
->fx_frag
->fr_address
4442 + fixP
->fx_where
- segment_address_in_file
),
4445 r_symbolnum
= (S_IS_DEFINED (fixP
->fx_addsy
)
4446 ? S_GET_TYPE (fixP
->fx_addsy
)
4447 : fixP
->fx_addsy
->sy_number
);
4449 where
[6] = (r_symbolnum
>> 16) & 0x0ff;
4450 where
[5] = (r_symbolnum
>> 8) & 0x0ff;
4451 where
[4] = r_symbolnum
& 0x0ff;
4452 where
[7] = ((((!S_IS_DEFINED (fixP
->fx_addsy
)) << 3) & 0x08)
4453 | ((nbytes_r_length
[fixP
->fx_size
] << 1) & 0x06)
4454 | (((fixP
->fx_pcrel
<< 0) & 0x01) & 0x0f));
4457 #endif /* OBJ_AOUT or OBJ_BOUT */
4459 #if defined (I386COFF)
4462 tc_coff_fix2rtype (fixP
)
4465 if (fixP
->fx_r_type
== R_IMAGEBASE
)
4468 return (fixP
->fx_pcrel
?
4469 (fixP
->fx_size
== 1 ? R_PCRBYTE
:
4470 fixP
->fx_size
== 2 ? R_PCRWORD
:
4472 (fixP
->fx_size
== 1 ? R_RELBYTE
:
4473 fixP
->fx_size
== 2 ? R_RELWORD
:
4478 tc_coff_sizemachdep (frag
)
4482 return (frag
->fr_next
->fr_address
- frag
->fr_address
);
4487 #endif /* I386COFF */
4489 #endif /* ! BFD_ASSEMBLER */
4491 /* end of tc-i386.c */