1 /* tc-i386.c -- Assemble code for the Intel 80386
2 Copyright 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 /* Intel 80386 machine specific gas.
24 Written by Eliot Dresselhaus (eliot@mgm.mit.edu).
25 x86_64 support by Jan Hubicka (jh@suse.cz)
26 VIA PadLock support by Michal Ludvig (mludvig@suse.cz)
27 Bugs & suggestions are completely welcome. This is free software.
28 Please help us make it better. */
31 #include "safe-ctype.h"
33 #include "dwarf2dbg.h"
34 #include "dw2gencfi.h"
35 #include "opcode/i386.h"
36 #include "elf/x86-64.h"
38 #ifndef REGISTER_WARNINGS
39 #define REGISTER_WARNINGS 1
42 #ifndef INFER_ADDR_PREFIX
43 #define INFER_ADDR_PREFIX 1
46 #ifndef SCALE1_WHEN_NO_INDEX
47 /* Specifying a scale factor besides 1 when there is no index is
48 futile. eg. `mov (%ebx,2),%al' does exactly the same as
49 `mov (%ebx),%al'. To slavishly follow what the programmer
50 specified, set SCALE1_WHEN_NO_INDEX to 0. */
51 #define SCALE1_WHEN_NO_INDEX 1
55 #define DEFAULT_ARCH "i386"
60 #define INLINE __inline__
66 static INLINE
unsigned int mode_from_disp_size
PARAMS ((unsigned int));
67 static INLINE
int fits_in_signed_byte
PARAMS ((offsetT
));
68 static INLINE
int fits_in_unsigned_byte
PARAMS ((offsetT
));
69 static INLINE
int fits_in_unsigned_word
PARAMS ((offsetT
));
70 static INLINE
int fits_in_signed_word
PARAMS ((offsetT
));
71 static INLINE
int fits_in_unsigned_long
PARAMS ((offsetT
));
72 static INLINE
int fits_in_signed_long
PARAMS ((offsetT
));
73 static int smallest_imm_type
PARAMS ((offsetT
));
74 static offsetT offset_in_range
PARAMS ((offsetT
, int));
75 static int add_prefix
PARAMS ((unsigned int));
76 static void set_code_flag
PARAMS ((int));
77 static void set_16bit_gcc_code_flag
PARAMS ((int));
78 static void set_intel_syntax
PARAMS ((int));
79 static void set_cpu_arch
PARAMS ((int));
81 static void pe_directive_secrel
PARAMS ((int));
83 static void signed_cons
PARAMS ((int));
84 static char *output_invalid
PARAMS ((int c
));
85 static int i386_operand
PARAMS ((char *operand_string
));
86 static int i386_intel_operand
PARAMS ((char *operand_string
, int got_a_float
));
87 static const reg_entry
*parse_register
PARAMS ((char *reg_string
,
89 static char *parse_insn
PARAMS ((char *, char *));
90 static char *parse_operands
PARAMS ((char *, const char *));
91 static void swap_operands
PARAMS ((void));
92 static void swap_imm_operands
PARAMS ((void));
93 static void optimize_imm
PARAMS ((void));
94 static void optimize_disp
PARAMS ((void));
95 static int match_template
PARAMS ((void));
96 static int check_string
PARAMS ((void));
97 static int process_suffix
PARAMS ((void));
98 static int check_byte_reg
PARAMS ((void));
99 static int check_long_reg
PARAMS ((void));
100 static int check_qword_reg
PARAMS ((void));
101 static int check_word_reg
PARAMS ((void));
102 static int finalize_imm
PARAMS ((void));
103 static int process_operands
PARAMS ((void));
104 static const seg_entry
*build_modrm_byte
PARAMS ((void));
105 static void output_insn
PARAMS ((void));
106 static void output_branch
PARAMS ((void));
107 static void output_jump
PARAMS ((void));
108 static void output_interseg_jump
PARAMS ((void));
109 static void output_imm
PARAMS ((fragS
*insn_start_frag
,
110 offsetT insn_start_off
));
111 static void output_disp
PARAMS ((fragS
*insn_start_frag
,
112 offsetT insn_start_off
));
114 static void s_bss
PARAMS ((int));
116 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
117 static void handle_large_common (int small ATTRIBUTE_UNUSED
);
120 static const char *default_arch
= DEFAULT_ARCH
;
122 /* 'md_assemble ()' gathers together information and puts it into a
129 const reg_entry
*regs
;
134 /* TM holds the template for the insn were currently assembling. */
137 /* SUFFIX holds the instruction mnemonic suffix if given.
138 (e.g. 'l' for 'movl') */
141 /* OPERANDS gives the number of given operands. */
142 unsigned int operands
;
144 /* REG_OPERANDS, DISP_OPERANDS, MEM_OPERANDS, IMM_OPERANDS give the number
145 of given register, displacement, memory operands and immediate
147 unsigned int reg_operands
, disp_operands
, mem_operands
, imm_operands
;
149 /* TYPES [i] is the type (see above #defines) which tells us how to
150 use OP[i] for the corresponding operand. */
151 unsigned int types
[MAX_OPERANDS
];
153 /* Displacement expression, immediate expression, or register for each
155 union i386_op op
[MAX_OPERANDS
];
157 /* Flags for operands. */
158 unsigned int flags
[MAX_OPERANDS
];
159 #define Operand_PCrel 1
161 /* Relocation type for operand */
162 enum bfd_reloc_code_real reloc
[MAX_OPERANDS
];
164 /* BASE_REG, INDEX_REG, and LOG2_SCALE_FACTOR are used to encode
165 the base index byte below. */
166 const reg_entry
*base_reg
;
167 const reg_entry
*index_reg
;
168 unsigned int log2_scale_factor
;
170 /* SEG gives the seg_entries of this insn. They are zero unless
171 explicit segment overrides are given. */
172 const seg_entry
*seg
[2];
174 /* PREFIX holds all the given prefix opcodes (usually null).
175 PREFIXES is the number of prefix opcodes. */
176 unsigned int prefixes
;
177 unsigned char prefix
[MAX_PREFIXES
];
179 /* RM and SIB are the modrm byte and the sib byte where the
180 addressing modes of this insn are encoded. */
187 typedef struct _i386_insn i386_insn
;
189 /* List of chars besides those in app.c:symbol_chars that can start an
190 operand. Used to prevent the scrubber eating vital white-space. */
191 const char extra_symbol_chars
[] = "*%-(["
200 #if (defined (TE_I386AIX) \
201 || ((defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) \
202 && !defined (TE_GNU) \
203 && !defined (TE_LINUX) \
204 && !defined (TE_NETWARE) \
205 && !defined (TE_FreeBSD) \
206 && !defined (TE_NetBSD)))
207 /* This array holds the chars that always start a comment. If the
208 pre-processor is disabled, these aren't very useful. The option
209 --divide will remove '/' from this list. */
210 const char *i386_comment_chars
= "#/";
211 #define SVR4_COMMENT_CHARS 1
212 #define PREFIX_SEPARATOR '\\'
215 const char *i386_comment_chars
= "#";
216 #define PREFIX_SEPARATOR '/'
219 /* This array holds the chars that only start a comment at the beginning of
220 a line. If the line seems to have the form '# 123 filename'
221 .line and .file directives will appear in the pre-processed output.
222 Note that input_file.c hand checks for '#' at the beginning of the
223 first line of the input file. This is because the compiler outputs
224 #NO_APP at the beginning of its output.
225 Also note that comments started like this one will always work if
226 '/' isn't otherwise defined. */
227 const char line_comment_chars
[] = "#/";
229 const char line_separator_chars
[] = ";";
231 /* Chars that can be used to separate mant from exp in floating point
233 const char EXP_CHARS
[] = "eE";
235 /* Chars that mean this number is a floating point constant
238 const char FLT_CHARS
[] = "fFdDxX";
240 /* Tables for lexical analysis. */
241 static char mnemonic_chars
[256];
242 static char register_chars
[256];
243 static char operand_chars
[256];
244 static char identifier_chars
[256];
245 static char digit_chars
[256];
247 /* Lexical macros. */
248 #define is_mnemonic_char(x) (mnemonic_chars[(unsigned char) x])
249 #define is_operand_char(x) (operand_chars[(unsigned char) x])
250 #define is_register_char(x) (register_chars[(unsigned char) x])
251 #define is_space_char(x) ((x) == ' ')
252 #define is_identifier_char(x) (identifier_chars[(unsigned char) x])
253 #define is_digit_char(x) (digit_chars[(unsigned char) x])
255 /* All non-digit non-letter characters that may occur in an operand. */
256 static char operand_special_chars
[] = "%$-+(,)*._~/<>|&^!:[@]";
258 /* md_assemble() always leaves the strings it's passed unaltered. To
259 effect this we maintain a stack of saved characters that we've smashed
260 with '\0's (indicating end of strings for various sub-fields of the
261 assembler instruction). */
262 static char save_stack
[32];
263 static char *save_stack_p
;
264 #define END_STRING_AND_SAVE(s) \
265 do { *save_stack_p++ = *(s); *(s) = '\0'; } while (0)
266 #define RESTORE_END_STRING(s) \
267 do { *(s) = *--save_stack_p; } while (0)
269 /* The instruction we're assembling. */
272 /* Possible templates for current insn. */
273 static const templates
*current_templates
;
275 /* Per instruction expressionS buffers: max displacements & immediates. */
276 static expressionS disp_expressions
[MAX_MEMORY_OPERANDS
];
277 static expressionS im_expressions
[MAX_IMMEDIATE_OPERANDS
];
279 /* Current operand we are working on. */
280 static int this_operand
;
282 /* We support four different modes. FLAG_CODE variable is used to distinguish
289 #define NUM_FLAG_CODE ((int) CODE_64BIT + 1)
291 static enum flag_code flag_code
;
292 static unsigned int object_64bit
;
293 static int use_rela_relocations
= 0;
295 /* The names used to print error messages. */
296 static const char *flag_code_names
[] =
303 /* 1 for intel syntax,
305 static int intel_syntax
= 0;
307 /* 1 if register prefix % not required. */
308 static int allow_naked_reg
= 0;
310 /* Used in 16 bit gcc mode to add an l suffix to call, ret, enter,
311 leave, push, and pop instructions so that gcc has the same stack
312 frame as in 32 bit mode. */
313 static char stackop_size
= '\0';
315 /* Non-zero to optimize code alignment. */
316 int optimize_align_code
= 1;
318 /* Non-zero to quieten some warnings. */
319 static int quiet_warnings
= 0;
322 static const char *cpu_arch_name
= NULL
;
323 static const char *cpu_sub_arch_name
= NULL
;
325 /* CPU feature flags. */
326 static unsigned int cpu_arch_flags
= CpuUnknownFlags
| CpuNo64
;
328 /* If we have selected a cpu we are generating instructions for. */
329 static int cpu_arch_tune_set
= 0;
331 /* Cpu we are generating instructions for. */
332 static enum processor_type cpu_arch_tune
= PROCESSOR_UNKNOWN
;
334 /* CPU feature flags of cpu we are generating instructions for. */
335 static unsigned int cpu_arch_tune_flags
= 0;
337 /* CPU instruction set architecture used. */
338 static enum processor_type cpu_arch_isa
= PROCESSOR_UNKNOWN
;
340 /* CPU feature flags of instruction set architecture used. */
341 static unsigned int cpu_arch_isa_flags
= 0;
343 /* If set, conditional jumps are not automatically promoted to handle
344 larger than a byte offset. */
345 static unsigned int no_cond_jump_promotion
= 0;
347 /* Pre-defined "_GLOBAL_OFFSET_TABLE_". */
348 static symbolS
*GOT_symbol
;
350 /* The dwarf2 return column, adjusted for 32 or 64 bit. */
351 unsigned int x86_dwarf2_return_column
;
353 /* The dwarf2 data alignment, adjusted for 32 or 64 bit. */
354 int x86_cie_data_alignment
;
356 /* Interface to relax_segment.
357 There are 3 major relax states for 386 jump insns because the
358 different types of jumps add different sizes to frags when we're
359 figuring out what sort of jump to choose to reach a given label. */
362 #define UNCOND_JUMP 0
364 #define COND_JUMP86 2
369 #define SMALL16 (SMALL | CODE16)
371 #define BIG16 (BIG | CODE16)
375 #define INLINE __inline__
381 #define ENCODE_RELAX_STATE(type, size) \
382 ((relax_substateT) (((type) << 2) | (size)))
383 #define TYPE_FROM_RELAX_STATE(s) \
385 #define DISP_SIZE_FROM_RELAX_STATE(s) \
386 ((((s) & 3) == BIG ? 4 : (((s) & 3) == BIG16 ? 2 : 1)))
388 /* This table is used by relax_frag to promote short jumps to long
389 ones where necessary. SMALL (short) jumps may be promoted to BIG
390 (32 bit long) ones, and SMALL16 jumps to BIG16 (16 bit long). We
391 don't allow a short jump in a 32 bit code segment to be promoted to
392 a 16 bit offset jump because it's slower (requires data size
393 prefix), and doesn't work, unless the destination is in the bottom
394 64k of the code segment (The top 16 bits of eip are zeroed). */
396 const relax_typeS md_relax_table
[] =
399 1) most positive reach of this state,
400 2) most negative reach of this state,
401 3) how many bytes this mode will have in the variable part of the frag
402 4) which index into the table to try if we can't fit into this one. */
404 /* UNCOND_JUMP states. */
405 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG
)},
406 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG16
)},
407 /* dword jmp adds 4 bytes to frag:
408 0 extra opcode bytes, 4 displacement bytes. */
410 /* word jmp adds 2 byte2 to frag:
411 0 extra opcode bytes, 2 displacement bytes. */
414 /* COND_JUMP states. */
415 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP
, BIG
)},
416 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP
, BIG16
)},
417 /* dword conditionals adds 5 bytes to frag:
418 1 extra opcode byte, 4 displacement bytes. */
420 /* word conditionals add 3 bytes to frag:
421 1 extra opcode byte, 2 displacement bytes. */
424 /* COND_JUMP86 states. */
425 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP86
, BIG
)},
426 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP86
, BIG16
)},
427 /* dword conditionals adds 5 bytes to frag:
428 1 extra opcode byte, 4 displacement bytes. */
430 /* word conditionals add 4 bytes to frag:
431 1 displacement byte and a 3 byte long branch insn. */
435 static const arch_entry cpu_arch
[] =
437 {"generic32", PROCESSOR_GENERIC32
,
438 Cpu186
|Cpu286
|Cpu386
},
439 {"generic64", PROCESSOR_GENERIC64
,
440 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
441 |CpuMMX2
|CpuSSE
|CpuSSE2
},
442 {"i8086", PROCESSOR_UNKNOWN
,
444 {"i186", PROCESSOR_UNKNOWN
,
446 {"i286", PROCESSOR_UNKNOWN
,
448 {"i386", PROCESSOR_GENERIC32
,
449 Cpu186
|Cpu286
|Cpu386
},
450 {"i486", PROCESSOR_I486
,
451 Cpu186
|Cpu286
|Cpu386
|Cpu486
},
452 {"i586", PROCESSOR_PENTIUM
,
453 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
},
454 {"i686", PROCESSOR_PENTIUMPRO
,
455 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
},
456 {"pentium", PROCESSOR_PENTIUM
,
457 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
},
458 {"pentiumpro",PROCESSOR_PENTIUMPRO
,
459 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
},
460 {"pentiumii", PROCESSOR_PENTIUMPRO
,
461 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuMMX
},
462 {"pentiumiii",PROCESSOR_PENTIUMPRO
,
463 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuMMX
|CpuMMX2
|CpuSSE
},
464 {"pentium4", PROCESSOR_PENTIUM4
,
465 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
466 |CpuMMX2
|CpuSSE
|CpuSSE2
},
467 {"prescott", PROCESSOR_NOCONA
,
468 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
469 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
},
470 {"nocona", PROCESSOR_NOCONA
,
471 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
472 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
},
473 {"yonah", PROCESSOR_CORE
,
474 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
475 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
},
476 {"core", PROCESSOR_CORE
,
477 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
478 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
},
479 {"merom", PROCESSOR_CORE2
,
480 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
481 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
|CpuSSSE3
},
482 {"core2", PROCESSOR_CORE2
,
483 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
484 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
|CpuSSSE3
},
486 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|CpuK6
|CpuMMX
},
487 {"k6_2", PROCESSOR_K6
,
488 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|CpuK6
|CpuMMX
|Cpu3dnow
},
489 {"athlon", PROCESSOR_ATHLON
,
490 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuK6
491 |CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
},
492 {"sledgehammer", PROCESSOR_K8
,
493 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuK6
494 |CpuSledgehammer
|CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
|CpuSSE
|CpuSSE2
},
495 {"opteron", PROCESSOR_K8
,
496 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuK6
497 |CpuSledgehammer
|CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
|CpuSSE
|CpuSSE2
},
499 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuK6
500 |CpuSledgehammer
|CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
|CpuSSE
|CpuSSE2
},
501 {"amdfam10", PROCESSOR_AMDFAM10
,
502 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuK6
|CpuSledgehammer
503 |CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
|CpuSSE
|CpuSSE2
|CpuSSE3
|CpuSSE4a
505 {".mmx", PROCESSOR_UNKNOWN
,
507 {".sse", PROCESSOR_UNKNOWN
,
508 CpuMMX
|CpuMMX2
|CpuSSE
},
509 {".sse2", PROCESSOR_UNKNOWN
,
510 CpuMMX
|CpuMMX2
|CpuSSE
|CpuSSE2
},
511 {".sse3", PROCESSOR_UNKNOWN
,
512 CpuMMX
|CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
},
513 {".ssse3", PROCESSOR_UNKNOWN
,
514 CpuMMX
|CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
|CpuSSSE3
},
515 {".3dnow", PROCESSOR_UNKNOWN
,
517 {".3dnowa", PROCESSOR_UNKNOWN
,
518 CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
},
519 {".padlock", PROCESSOR_UNKNOWN
,
521 {".pacifica", PROCESSOR_UNKNOWN
,
523 {".svme", PROCESSOR_UNKNOWN
,
525 {".sse4a", PROCESSOR_UNKNOWN
,
526 CpuMMX
|CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
|CpuSSE4a
},
527 {".abm", PROCESSOR_UNKNOWN
,
531 const pseudo_typeS md_pseudo_table
[] =
533 #if !defined(OBJ_AOUT) && !defined(USE_ALIGN_PTWO)
534 {"align", s_align_bytes
, 0},
536 {"align", s_align_ptwo
, 0},
538 {"arch", set_cpu_arch
, 0},
542 {"ffloat", float_cons
, 'f'},
543 {"dfloat", float_cons
, 'd'},
544 {"tfloat", float_cons
, 'x'},
546 {"slong", signed_cons
, 4},
547 {"noopt", s_ignore
, 0},
548 {"optim", s_ignore
, 0},
549 {"code16gcc", set_16bit_gcc_code_flag
, CODE_16BIT
},
550 {"code16", set_code_flag
, CODE_16BIT
},
551 {"code32", set_code_flag
, CODE_32BIT
},
552 {"code64", set_code_flag
, CODE_64BIT
},
553 {"intel_syntax", set_intel_syntax
, 1},
554 {"att_syntax", set_intel_syntax
, 0},
555 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
556 {"largecomm", handle_large_common
, 0},
558 {"file", (void (*) PARAMS ((int))) dwarf2_directive_file
, 0},
559 {"loc", dwarf2_directive_loc
, 0},
560 {"loc_mark_labels", dwarf2_directive_loc_mark_labels
, 0},
563 {"secrel32", pe_directive_secrel
, 0},
568 /* For interface with expression (). */
569 extern char *input_line_pointer
;
571 /* Hash table for instruction mnemonic lookup. */
572 static struct hash_control
*op_hash
;
574 /* Hash table for register lookup. */
575 static struct hash_control
*reg_hash
;
578 i386_align_code (fragP
, count
)
582 /* Various efficient no-op patterns for aligning code labels.
583 Note: Don't try to assemble the instructions in the comments.
584 0L and 0w are not legal. */
585 static const char f32_1
[] =
587 static const char f32_2
[] =
588 {0x66,0x90}; /* xchg %ax,%ax */
589 static const char f32_3
[] =
590 {0x8d,0x76,0x00}; /* leal 0(%esi),%esi */
591 static const char f32_4
[] =
592 {0x8d,0x74,0x26,0x00}; /* leal 0(%esi,1),%esi */
593 static const char f32_5
[] =
595 0x8d,0x74,0x26,0x00}; /* leal 0(%esi,1),%esi */
596 static const char f32_6
[] =
597 {0x8d,0xb6,0x00,0x00,0x00,0x00}; /* leal 0L(%esi),%esi */
598 static const char f32_7
[] =
599 {0x8d,0xb4,0x26,0x00,0x00,0x00,0x00}; /* leal 0L(%esi,1),%esi */
600 static const char f32_8
[] =
602 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00}; /* leal 0L(%esi,1),%esi */
603 static const char f32_9
[] =
604 {0x89,0xf6, /* movl %esi,%esi */
605 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
606 static const char f32_10
[] =
607 {0x8d,0x76,0x00, /* leal 0(%esi),%esi */
608 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
609 static const char f32_11
[] =
610 {0x8d,0x74,0x26,0x00, /* leal 0(%esi,1),%esi */
611 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
612 static const char f32_12
[] =
613 {0x8d,0xb6,0x00,0x00,0x00,0x00, /* leal 0L(%esi),%esi */
614 0x8d,0xbf,0x00,0x00,0x00,0x00}; /* leal 0L(%edi),%edi */
615 static const char f32_13
[] =
616 {0x8d,0xb6,0x00,0x00,0x00,0x00, /* leal 0L(%esi),%esi */
617 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
618 static const char f32_14
[] =
619 {0x8d,0xb4,0x26,0x00,0x00,0x00,0x00, /* leal 0L(%esi,1),%esi */
620 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
621 static const char f32_15
[] =
622 {0xeb,0x0d,0x90,0x90,0x90,0x90,0x90, /* jmp .+15; lotsa nops */
623 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90};
624 static const char f16_3
[] =
625 {0x8d,0x74,0x00}; /* lea 0(%esi),%esi */
626 static const char f16_4
[] =
627 {0x8d,0xb4,0x00,0x00}; /* lea 0w(%si),%si */
628 static const char f16_5
[] =
630 0x8d,0xb4,0x00,0x00}; /* lea 0w(%si),%si */
631 static const char f16_6
[] =
632 {0x89,0xf6, /* mov %si,%si */
633 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
634 static const char f16_7
[] =
635 {0x8d,0x74,0x00, /* lea 0(%si),%si */
636 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
637 static const char f16_8
[] =
638 {0x8d,0xb4,0x00,0x00, /* lea 0w(%si),%si */
639 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
640 static const char *const f32_patt
[] = {
641 f32_1
, f32_2
, f32_3
, f32_4
, f32_5
, f32_6
, f32_7
, f32_8
,
642 f32_9
, f32_10
, f32_11
, f32_12
, f32_13
, f32_14
, f32_15
644 static const char *const f16_patt
[] = {
645 f32_1
, f32_2
, f16_3
, f16_4
, f16_5
, f16_6
, f16_7
, f16_8
,
646 f32_15
, f32_15
, f32_15
, f32_15
, f32_15
, f32_15
, f32_15
649 static const char alt_3
[] =
651 /* nopl 0(%[re]ax) */
652 static const char alt_4
[] =
653 {0x0f,0x1f,0x40,0x00};
654 /* nopl 0(%[re]ax,%[re]ax,1) */
655 static const char alt_5
[] =
656 {0x0f,0x1f,0x44,0x00,0x00};
657 /* nopw 0(%[re]ax,%[re]ax,1) */
658 static const char alt_6
[] =
659 {0x66,0x0f,0x1f,0x44,0x00,0x00};
660 /* nopl 0L(%[re]ax) */
661 static const char alt_7
[] =
662 {0x0f,0x1f,0x80,0x00,0x00,0x00,0x00};
663 /* nopl 0L(%[re]ax,%[re]ax,1) */
664 static const char alt_8
[] =
665 {0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
666 /* nopw 0L(%[re]ax,%[re]ax,1) */
667 static const char alt_9
[] =
668 {0x66,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
669 /* nopw %cs:0L(%[re]ax,%[re]ax,1) */
670 static const char alt_10
[] =
671 {0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
673 nopw %cs:0L(%[re]ax,%[re]ax,1) */
674 static const char alt_long_11
[] =
676 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
679 nopw %cs:0L(%[re]ax,%[re]ax,1) */
680 static const char alt_long_12
[] =
683 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
687 nopw %cs:0L(%[re]ax,%[re]ax,1) */
688 static const char alt_long_13
[] =
692 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
697 nopw %cs:0L(%[re]ax,%[re]ax,1) */
698 static const char alt_long_14
[] =
703 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
709 nopw %cs:0L(%[re]ax,%[re]ax,1) */
710 static const char alt_long_15
[] =
716 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
717 /* nopl 0(%[re]ax,%[re]ax,1)
718 nopw 0(%[re]ax,%[re]ax,1) */
719 static const char alt_short_11
[] =
720 {0x0f,0x1f,0x44,0x00,0x00,
721 0x66,0x0f,0x1f,0x44,0x00,0x00};
722 /* nopw 0(%[re]ax,%[re]ax,1)
723 nopw 0(%[re]ax,%[re]ax,1) */
724 static const char alt_short_12
[] =
725 {0x66,0x0f,0x1f,0x44,0x00,0x00,
726 0x66,0x0f,0x1f,0x44,0x00,0x00};
727 /* nopw 0(%[re]ax,%[re]ax,1)
729 static const char alt_short_13
[] =
730 {0x66,0x0f,0x1f,0x44,0x00,0x00,
731 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00};
734 static const char alt_short_14
[] =
735 {0x0f,0x1f,0x80,0x00,0x00,0x00,0x00,
736 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00};
738 nopl 0L(%[re]ax,%[re]ax,1) */
739 static const char alt_short_15
[] =
740 {0x0f,0x1f,0x80,0x00,0x00,0x00,0x00,
741 0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
742 static const char *const alt_short_patt
[] = {
743 f32_1
, f32_2
, alt_3
, alt_4
, alt_5
, alt_6
, alt_7
, alt_8
,
744 alt_9
, alt_10
, alt_short_11
, alt_short_12
, alt_short_13
,
745 alt_short_14
, alt_short_15
747 static const char *const alt_long_patt
[] = {
748 f32_1
, f32_2
, alt_3
, alt_4
, alt_5
, alt_6
, alt_7
, alt_8
,
749 alt_9
, alt_10
, alt_long_11
, alt_long_12
, alt_long_13
,
750 alt_long_14
, alt_long_15
753 if (count
<= 0 || count
> 15)
756 /* We need to decide which NOP sequence to use for 32bit and
757 64bit. When -mtune= is used:
759 1. For PROCESSOR_I486, PROCESSOR_PENTIUM and PROCESSOR_GENERIC32,
760 f32_patt will be used.
761 2. For PROCESSOR_K8 and PROCESSOR_AMDFAM10 in 64bit, NOPs with 0x66 prefix will be used.
762 3. For PROCESSOR_CORE2, alt_long_patt will be used.
763 4. For PROCESSOR_PENTIUMPRO, PROCESSOR_PENTIUM4, PROCESSOR_NOCONA,
764 PROCESSOR_CORE, PROCESSOR_CORE2, PROCESSOR_K6, PROCESSOR_ATHLON
765 and PROCESSOR_GENERIC64, alt_short_patt will be used.
767 When -mtune= isn't used, alt_short_patt will be used if
768 cpu_arch_isa_flags has Cpu686. Otherwise, f32_patt will be used.
770 When -march= or .arch is used, we can't use anything beyond
771 cpu_arch_isa_flags. */
773 if (flag_code
== CODE_16BIT
)
775 memcpy (fragP
->fr_literal
+ fragP
->fr_fix
,
776 f16_patt
[count
- 1], count
);
778 /* Adjust jump offset. */
779 fragP
->fr_literal
[fragP
->fr_fix
+ 1] = count
- 2;
781 else if (flag_code
== CODE_64BIT
&& cpu_arch_tune
== PROCESSOR_K8
)
784 int nnops
= (count
+ 3) / 4;
785 int len
= count
/ nnops
;
786 int remains
= count
- nnops
* len
;
789 /* The recommended way to pad 64bit code is to use NOPs preceded
790 by maximally four 0x66 prefixes. Balance the size of nops. */
791 for (i
= 0; i
< remains
; i
++)
793 memset (fragP
->fr_literal
+ fragP
->fr_fix
+ pos
, 0x66, len
);
794 fragP
->fr_literal
[fragP
->fr_fix
+ pos
+ len
] = 0x90;
797 for (; i
< nnops
; i
++)
799 memset (fragP
->fr_literal
+ fragP
->fr_fix
+ pos
, 0x66, len
- 1);
800 fragP
->fr_literal
[fragP
->fr_fix
+ pos
+ len
- 1] = 0x90;
806 const char *const *patt
= NULL
;
808 if (cpu_arch_isa
== PROCESSOR_UNKNOWN
)
810 /* PROCESSOR_UNKNOWN means that all ISAs may be used. */
811 switch (cpu_arch_tune
)
813 case PROCESSOR_UNKNOWN
:
814 /* We use cpu_arch_isa_flags to check if we SHOULD
815 optimize for Cpu686. */
816 if ((cpu_arch_isa_flags
& Cpu686
) != 0)
817 patt
= alt_short_patt
;
821 case PROCESSOR_CORE2
:
822 patt
= alt_long_patt
;
824 case PROCESSOR_PENTIUMPRO
:
825 case PROCESSOR_PENTIUM4
:
826 case PROCESSOR_NOCONA
:
829 case PROCESSOR_ATHLON
:
831 case PROCESSOR_GENERIC64
:
832 case PROCESSOR_AMDFAM10
:
833 patt
= alt_short_patt
;
836 case PROCESSOR_PENTIUM
:
837 case PROCESSOR_GENERIC32
:
844 switch (cpu_arch_tune
)
846 case PROCESSOR_UNKNOWN
:
847 /* When cpu_arch_isa is net, cpu_arch_tune shouldn't be
848 PROCESSOR_UNKNOWN. */
853 case PROCESSOR_PENTIUM
:
854 case PROCESSOR_PENTIUMPRO
:
855 case PROCESSOR_PENTIUM4
:
856 case PROCESSOR_NOCONA
:
859 case PROCESSOR_ATHLON
:
861 case PROCESSOR_AMDFAM10
:
862 case PROCESSOR_GENERIC32
:
863 /* We use cpu_arch_isa_flags to check if we CAN optimize
865 if ((cpu_arch_isa_flags
& Cpu686
) != 0)
866 patt
= alt_short_patt
;
870 case PROCESSOR_CORE2
:
871 if ((cpu_arch_isa_flags
& Cpu686
) != 0)
872 patt
= alt_long_patt
;
876 case PROCESSOR_GENERIC64
:
877 patt
= alt_short_patt
;
882 memcpy (fragP
->fr_literal
+ fragP
->fr_fix
,
883 patt
[count
- 1], count
);
885 fragP
->fr_var
= count
;
888 static INLINE
unsigned int
889 mode_from_disp_size (t
)
892 return (t
& Disp8
) ? 1 : (t
& (Disp16
| Disp32
| Disp32S
)) ? 2 : 0;
896 fits_in_signed_byte (num
)
899 return (num
>= -128) && (num
<= 127);
903 fits_in_unsigned_byte (num
)
906 return (num
& 0xff) == num
;
910 fits_in_unsigned_word (num
)
913 return (num
& 0xffff) == num
;
917 fits_in_signed_word (num
)
920 return (-32768 <= num
) && (num
<= 32767);
924 fits_in_signed_long (num
)
925 offsetT num ATTRIBUTE_UNUSED
;
930 return (!(((offsetT
) -1 << 31) & num
)
931 || (((offsetT
) -1 << 31) & num
) == ((offsetT
) -1 << 31));
933 } /* fits_in_signed_long() */
936 fits_in_unsigned_long (num
)
937 offsetT num ATTRIBUTE_UNUSED
;
942 return (num
& (((offsetT
) 2 << 31) - 1)) == num
;
944 } /* fits_in_unsigned_long() */
947 smallest_imm_type (num
)
950 if (cpu_arch_flags
!= (Cpu186
| Cpu286
| Cpu386
| Cpu486
| CpuNo64
))
952 /* This code is disabled on the 486 because all the Imm1 forms
953 in the opcode table are slower on the i486. They're the
954 versions with the implicitly specified single-position
955 displacement, which has another syntax if you really want to
958 return Imm1
| Imm8
| Imm8S
| Imm16
| Imm32
| Imm32S
| Imm64
;
960 return (fits_in_signed_byte (num
)
961 ? (Imm8S
| Imm8
| Imm16
| Imm32
| Imm32S
| Imm64
)
962 : fits_in_unsigned_byte (num
)
963 ? (Imm8
| Imm16
| Imm32
| Imm32S
| Imm64
)
964 : (fits_in_signed_word (num
) || fits_in_unsigned_word (num
))
965 ? (Imm16
| Imm32
| Imm32S
| Imm64
)
966 : fits_in_signed_long (num
)
967 ? (Imm32
| Imm32S
| Imm64
)
968 : fits_in_unsigned_long (num
)
974 offset_in_range (val
, size
)
982 case 1: mask
= ((addressT
) 1 << 8) - 1; break;
983 case 2: mask
= ((addressT
) 1 << 16) - 1; break;
984 case 4: mask
= ((addressT
) 2 << 31) - 1; break;
986 case 8: mask
= ((addressT
) 2 << 63) - 1; break;
991 /* If BFD64, sign extend val. */
992 if (!use_rela_relocations
)
993 if ((val
& ~(((addressT
) 2 << 31) - 1)) == 0)
994 val
= (val
^ ((addressT
) 1 << 31)) - ((addressT
) 1 << 31);
996 if ((val
& ~mask
) != 0 && (val
& ~mask
) != ~mask
)
998 char buf1
[40], buf2
[40];
1000 sprint_value (buf1
, val
);
1001 sprint_value (buf2
, val
& mask
);
1002 as_warn (_("%s shortened to %s"), buf1
, buf2
);
1007 /* Returns 0 if attempting to add a prefix where one from the same
1008 class already exists, 1 if non rep/repne added, 2 if rep/repne
1012 unsigned int prefix
;
1017 if (prefix
>= REX_OPCODE
&& prefix
< REX_OPCODE
+ 16
1018 && flag_code
== CODE_64BIT
)
1020 if ((i
.prefix
[REX_PREFIX
] & prefix
& REX_MODE64
)
1021 || ((i
.prefix
[REX_PREFIX
] & (REX_EXTX
| REX_EXTY
| REX_EXTZ
))
1022 && (prefix
& (REX_EXTX
| REX_EXTY
| REX_EXTZ
))))
1033 case CS_PREFIX_OPCODE
:
1034 case DS_PREFIX_OPCODE
:
1035 case ES_PREFIX_OPCODE
:
1036 case FS_PREFIX_OPCODE
:
1037 case GS_PREFIX_OPCODE
:
1038 case SS_PREFIX_OPCODE
:
1042 case REPNE_PREFIX_OPCODE
:
1043 case REPE_PREFIX_OPCODE
:
1046 case LOCK_PREFIX_OPCODE
:
1054 case ADDR_PREFIX_OPCODE
:
1058 case DATA_PREFIX_OPCODE
:
1062 if (i
.prefix
[q
] != 0)
1070 i
.prefix
[q
] |= prefix
;
1073 as_bad (_("same type of prefix used twice"));
1079 set_code_flag (value
)
1083 cpu_arch_flags
&= ~(Cpu64
| CpuNo64
);
1084 cpu_arch_flags
|= (flag_code
== CODE_64BIT
? Cpu64
: CpuNo64
);
1085 if (value
== CODE_64BIT
&& !(cpu_arch_flags
& CpuSledgehammer
))
1087 as_bad (_("64bit mode not supported on this CPU."));
1089 if (value
== CODE_32BIT
&& !(cpu_arch_flags
& Cpu386
))
1091 as_bad (_("32bit mode not supported on this CPU."));
1093 stackop_size
= '\0';
1097 set_16bit_gcc_code_flag (new_code_flag
)
1100 flag_code
= new_code_flag
;
1101 cpu_arch_flags
&= ~(Cpu64
| CpuNo64
);
1102 cpu_arch_flags
|= (flag_code
== CODE_64BIT
? Cpu64
: CpuNo64
);
1103 stackop_size
= LONG_MNEM_SUFFIX
;
1107 set_intel_syntax (syntax_flag
)
1110 /* Find out if register prefixing is specified. */
1111 int ask_naked_reg
= 0;
1114 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1116 char *string
= input_line_pointer
;
1117 int e
= get_symbol_end ();
1119 if (strcmp (string
, "prefix") == 0)
1121 else if (strcmp (string
, "noprefix") == 0)
1124 as_bad (_("bad argument to syntax directive."));
1125 *input_line_pointer
= e
;
1127 demand_empty_rest_of_line ();
1129 intel_syntax
= syntax_flag
;
1131 if (ask_naked_reg
== 0)
1132 allow_naked_reg
= (intel_syntax
1133 && (bfd_get_symbol_leading_char (stdoutput
) != '\0'));
1135 allow_naked_reg
= (ask_naked_reg
< 0);
1137 identifier_chars
['%'] = intel_syntax
&& allow_naked_reg
? '%' : 0;
1138 identifier_chars
['$'] = intel_syntax
? '$' : 0;
1142 set_cpu_arch (dummy
)
1143 int dummy ATTRIBUTE_UNUSED
;
1147 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1149 char *string
= input_line_pointer
;
1150 int e
= get_symbol_end ();
1153 for (i
= 0; i
< ARRAY_SIZE (cpu_arch
); i
++)
1155 if (strcmp (string
, cpu_arch
[i
].name
) == 0)
1159 cpu_arch_name
= cpu_arch
[i
].name
;
1160 cpu_sub_arch_name
= NULL
;
1161 cpu_arch_flags
= (cpu_arch
[i
].flags
1162 | (flag_code
== CODE_64BIT
? Cpu64
: CpuNo64
));
1163 cpu_arch_isa
= cpu_arch
[i
].type
;
1164 cpu_arch_isa_flags
= cpu_arch
[i
].flags
;
1165 if (!cpu_arch_tune_set
)
1167 cpu_arch_tune
= cpu_arch_isa
;
1168 cpu_arch_tune_flags
= cpu_arch_isa_flags
;
1172 if ((cpu_arch_flags
| cpu_arch
[i
].flags
) != cpu_arch_flags
)
1174 cpu_sub_arch_name
= cpu_arch
[i
].name
;
1175 cpu_arch_flags
|= cpu_arch
[i
].flags
;
1177 *input_line_pointer
= e
;
1178 demand_empty_rest_of_line ();
1182 if (i
>= ARRAY_SIZE (cpu_arch
))
1183 as_bad (_("no such architecture: `%s'"), string
);
1185 *input_line_pointer
= e
;
1188 as_bad (_("missing cpu architecture"));
1190 no_cond_jump_promotion
= 0;
1191 if (*input_line_pointer
== ','
1192 && !is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1194 char *string
= ++input_line_pointer
;
1195 int e
= get_symbol_end ();
1197 if (strcmp (string
, "nojumps") == 0)
1198 no_cond_jump_promotion
= 1;
1199 else if (strcmp (string
, "jumps") == 0)
1202 as_bad (_("no such architecture modifier: `%s'"), string
);
1204 *input_line_pointer
= e
;
1207 demand_empty_rest_of_line ();
1213 if (!strcmp (default_arch
, "x86_64"))
1214 return bfd_mach_x86_64
;
1215 else if (!strcmp (default_arch
, "i386"))
1216 return bfd_mach_i386_i386
;
1218 as_fatal (_("Unknown architecture"));
1224 const char *hash_err
;
1226 /* Initialize op_hash hash table. */
1227 op_hash
= hash_new ();
1230 const template *optab
;
1231 templates
*core_optab
;
1233 /* Setup for loop. */
1235 core_optab
= (templates
*) xmalloc (sizeof (templates
));
1236 core_optab
->start
= optab
;
1241 if (optab
->name
== NULL
1242 || strcmp (optab
->name
, (optab
- 1)->name
) != 0)
1244 /* different name --> ship out current template list;
1245 add to hash table; & begin anew. */
1246 core_optab
->end
= optab
;
1247 hash_err
= hash_insert (op_hash
,
1252 as_fatal (_("Internal Error: Can't hash %s: %s"),
1256 if (optab
->name
== NULL
)
1258 core_optab
= (templates
*) xmalloc (sizeof (templates
));
1259 core_optab
->start
= optab
;
1264 /* Initialize reg_hash hash table. */
1265 reg_hash
= hash_new ();
1267 const reg_entry
*regtab
;
1269 for (regtab
= i386_regtab
;
1270 regtab
< i386_regtab
+ sizeof (i386_regtab
) / sizeof (i386_regtab
[0]);
1273 hash_err
= hash_insert (reg_hash
, regtab
->reg_name
, (PTR
) regtab
);
1275 as_fatal (_("Internal Error: Can't hash %s: %s"),
1281 /* Fill in lexical tables: mnemonic_chars, operand_chars. */
1286 for (c
= 0; c
< 256; c
++)
1291 mnemonic_chars
[c
] = c
;
1292 register_chars
[c
] = c
;
1293 operand_chars
[c
] = c
;
1295 else if (ISLOWER (c
))
1297 mnemonic_chars
[c
] = c
;
1298 register_chars
[c
] = c
;
1299 operand_chars
[c
] = c
;
1301 else if (ISUPPER (c
))
1303 mnemonic_chars
[c
] = TOLOWER (c
);
1304 register_chars
[c
] = mnemonic_chars
[c
];
1305 operand_chars
[c
] = c
;
1308 if (ISALPHA (c
) || ISDIGIT (c
))
1309 identifier_chars
[c
] = c
;
1312 identifier_chars
[c
] = c
;
1313 operand_chars
[c
] = c
;
1318 identifier_chars
['@'] = '@';
1321 identifier_chars
['?'] = '?';
1322 operand_chars
['?'] = '?';
1324 digit_chars
['-'] = '-';
1325 mnemonic_chars
['-'] = '-';
1326 identifier_chars
['_'] = '_';
1327 identifier_chars
['.'] = '.';
1329 for (p
= operand_special_chars
; *p
!= '\0'; p
++)
1330 operand_chars
[(unsigned char) *p
] = *p
;
1333 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
1336 record_alignment (text_section
, 2);
1337 record_alignment (data_section
, 2);
1338 record_alignment (bss_section
, 2);
1342 if (flag_code
== CODE_64BIT
)
1344 x86_dwarf2_return_column
= 16;
1345 x86_cie_data_alignment
= -8;
1349 x86_dwarf2_return_column
= 8;
1350 x86_cie_data_alignment
= -4;
1355 i386_print_statistics (file
)
1358 hash_print_statistics (file
, "i386 opcode", op_hash
);
1359 hash_print_statistics (file
, "i386 register", reg_hash
);
1364 /* Debugging routines for md_assemble. */
1365 static void pi
PARAMS ((char *, i386_insn
*));
1366 static void pte
PARAMS ((template *));
1367 static void pt
PARAMS ((unsigned int));
1368 static void pe
PARAMS ((expressionS
*));
1369 static void ps
PARAMS ((symbolS
*));
1378 fprintf (stdout
, "%s: template ", line
);
1380 fprintf (stdout
, " address: base %s index %s scale %x\n",
1381 x
->base_reg
? x
->base_reg
->reg_name
: "none",
1382 x
->index_reg
? x
->index_reg
->reg_name
: "none",
1383 x
->log2_scale_factor
);
1384 fprintf (stdout
, " modrm: mode %x reg %x reg/mem %x\n",
1385 x
->rm
.mode
, x
->rm
.reg
, x
->rm
.regmem
);
1386 fprintf (stdout
, " sib: base %x index %x scale %x\n",
1387 x
->sib
.base
, x
->sib
.index
, x
->sib
.scale
);
1388 fprintf (stdout
, " rex: 64bit %x extX %x extY %x extZ %x\n",
1389 (x
->rex
& REX_MODE64
) != 0,
1390 (x
->rex
& REX_EXTX
) != 0,
1391 (x
->rex
& REX_EXTY
) != 0,
1392 (x
->rex
& REX_EXTZ
) != 0);
1393 for (i
= 0; i
< x
->operands
; i
++)
1395 fprintf (stdout
, " #%d: ", i
+ 1);
1397 fprintf (stdout
, "\n");
1399 & (Reg
| SReg2
| SReg3
| Control
| Debug
| Test
| RegMMX
| RegXMM
))
1400 fprintf (stdout
, "%s\n", x
->op
[i
].regs
->reg_name
);
1401 if (x
->types
[i
] & Imm
)
1403 if (x
->types
[i
] & Disp
)
1404 pe (x
->op
[i
].disps
);
1413 fprintf (stdout
, " %d operands ", t
->operands
);
1414 fprintf (stdout
, "opcode %x ", t
->base_opcode
);
1415 if (t
->extension_opcode
!= None
)
1416 fprintf (stdout
, "ext %x ", t
->extension_opcode
);
1417 if (t
->opcode_modifier
& D
)
1418 fprintf (stdout
, "D");
1419 if (t
->opcode_modifier
& W
)
1420 fprintf (stdout
, "W");
1421 fprintf (stdout
, "\n");
1422 for (i
= 0; i
< t
->operands
; i
++)
1424 fprintf (stdout
, " #%d type ", i
+ 1);
1425 pt (t
->operand_types
[i
]);
1426 fprintf (stdout
, "\n");
1434 fprintf (stdout
, " operation %d\n", e
->X_op
);
1435 fprintf (stdout
, " add_number %ld (%lx)\n",
1436 (long) e
->X_add_number
, (long) e
->X_add_number
);
1437 if (e
->X_add_symbol
)
1439 fprintf (stdout
, " add_symbol ");
1440 ps (e
->X_add_symbol
);
1441 fprintf (stdout
, "\n");
1445 fprintf (stdout
, " op_symbol ");
1446 ps (e
->X_op_symbol
);
1447 fprintf (stdout
, "\n");
1455 fprintf (stdout
, "%s type %s%s",
1457 S_IS_EXTERNAL (s
) ? "EXTERNAL " : "",
1458 segment_name (S_GET_SEGMENT (s
)));
1461 static struct type_name
1466 const type_names
[] =
1479 { BaseIndex
, "BaseIndex" },
1483 { Disp32S
, "d32s" },
1485 { InOutPortReg
, "InOutPortReg" },
1486 { ShiftCount
, "ShiftCount" },
1487 { Control
, "control reg" },
1488 { Test
, "test reg" },
1489 { Debug
, "debug reg" },
1490 { FloatReg
, "FReg" },
1491 { FloatAcc
, "FAcc" },
1495 { JumpAbsolute
, "Jump Absolute" },
1506 const struct type_name
*ty
;
1508 for (ty
= type_names
; ty
->mask
; ty
++)
1510 fprintf (stdout
, "%s, ", ty
->tname
);
1514 #endif /* DEBUG386 */
1516 static bfd_reloc_code_real_type
1517 reloc (unsigned int size
,
1520 bfd_reloc_code_real_type other
)
1522 if (other
!= NO_RELOC
)
1524 reloc_howto_type
*reloc
;
1529 case BFD_RELOC_X86_64_GOT32
:
1530 return BFD_RELOC_X86_64_GOT64
;
1532 case BFD_RELOC_X86_64_PLTOFF64
:
1533 return BFD_RELOC_X86_64_PLTOFF64
;
1535 case BFD_RELOC_X86_64_GOTPC32
:
1536 other
= BFD_RELOC_X86_64_GOTPC64
;
1538 case BFD_RELOC_X86_64_GOTPCREL
:
1539 other
= BFD_RELOC_X86_64_GOTPCREL64
;
1541 case BFD_RELOC_X86_64_TPOFF32
:
1542 other
= BFD_RELOC_X86_64_TPOFF64
;
1544 case BFD_RELOC_X86_64_DTPOFF32
:
1545 other
= BFD_RELOC_X86_64_DTPOFF64
;
1551 /* Sign-checking 4-byte relocations in 16-/32-bit code is pointless. */
1552 if (size
== 4 && flag_code
!= CODE_64BIT
)
1555 reloc
= bfd_reloc_type_lookup (stdoutput
, other
);
1557 as_bad (_("unknown relocation (%u)"), other
);
1558 else if (size
!= bfd_get_reloc_size (reloc
))
1559 as_bad (_("%u-byte relocation cannot be applied to %u-byte field"),
1560 bfd_get_reloc_size (reloc
),
1562 else if (pcrel
&& !reloc
->pc_relative
)
1563 as_bad (_("non-pc-relative relocation for pc-relative field"));
1564 else if ((reloc
->complain_on_overflow
== complain_overflow_signed
1566 || (reloc
->complain_on_overflow
== complain_overflow_unsigned
1568 as_bad (_("relocated field and relocation type differ in signedness"));
1577 as_bad (_("there are no unsigned pc-relative relocations"));
1580 case 1: return BFD_RELOC_8_PCREL
;
1581 case 2: return BFD_RELOC_16_PCREL
;
1582 case 4: return BFD_RELOC_32_PCREL
;
1583 case 8: return BFD_RELOC_64_PCREL
;
1585 as_bad (_("cannot do %u byte pc-relative relocation"), size
);
1592 case 4: return BFD_RELOC_X86_64_32S
;
1597 case 1: return BFD_RELOC_8
;
1598 case 2: return BFD_RELOC_16
;
1599 case 4: return BFD_RELOC_32
;
1600 case 8: return BFD_RELOC_64
;
1602 as_bad (_("cannot do %s %u byte relocation"),
1603 sign
> 0 ? "signed" : "unsigned", size
);
1607 return BFD_RELOC_NONE
;
1610 /* Here we decide which fixups can be adjusted to make them relative to
1611 the beginning of the section instead of the symbol. Basically we need
1612 to make sure that the dynamic relocations are done correctly, so in
1613 some cases we force the original symbol to be used. */
1616 tc_i386_fix_adjustable (fixP
)
1617 fixS
*fixP ATTRIBUTE_UNUSED
;
1619 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
1623 /* Don't adjust pc-relative references to merge sections in 64-bit
1625 if (use_rela_relocations
1626 && (S_GET_SEGMENT (fixP
->fx_addsy
)->flags
& SEC_MERGE
) != 0
1630 /* The x86_64 GOTPCREL are represented as 32bit PCrel relocations
1631 and changed later by validate_fix. */
1632 if (GOT_symbol
&& fixP
->fx_subsy
== GOT_symbol
1633 && fixP
->fx_r_type
== BFD_RELOC_32_PCREL
)
1636 /* adjust_reloc_syms doesn't know about the GOT. */
1637 if (fixP
->fx_r_type
== BFD_RELOC_386_GOTOFF
1638 || fixP
->fx_r_type
== BFD_RELOC_386_PLT32
1639 || fixP
->fx_r_type
== BFD_RELOC_386_GOT32
1640 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_GD
1641 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_LDM
1642 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_LDO_32
1643 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_IE_32
1644 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_IE
1645 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_GOTIE
1646 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_LE_32
1647 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_LE
1648 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_GOTDESC
1649 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_DESC_CALL
1650 || fixP
->fx_r_type
== BFD_RELOC_X86_64_PLT32
1651 || fixP
->fx_r_type
== BFD_RELOC_X86_64_GOT32
1652 || fixP
->fx_r_type
== BFD_RELOC_X86_64_GOTPCREL
1653 || fixP
->fx_r_type
== BFD_RELOC_X86_64_TLSGD
1654 || fixP
->fx_r_type
== BFD_RELOC_X86_64_TLSLD
1655 || fixP
->fx_r_type
== BFD_RELOC_X86_64_DTPOFF32
1656 || fixP
->fx_r_type
== BFD_RELOC_X86_64_DTPOFF64
1657 || fixP
->fx_r_type
== BFD_RELOC_X86_64_GOTTPOFF
1658 || fixP
->fx_r_type
== BFD_RELOC_X86_64_TPOFF32
1659 || fixP
->fx_r_type
== BFD_RELOC_X86_64_TPOFF64
1660 || fixP
->fx_r_type
== BFD_RELOC_X86_64_GOTOFF64
1661 || fixP
->fx_r_type
== BFD_RELOC_X86_64_GOTPC32_TLSDESC
1662 || fixP
->fx_r_type
== BFD_RELOC_X86_64_TLSDESC_CALL
1663 || fixP
->fx_r_type
== BFD_RELOC_VTABLE_INHERIT
1664 || fixP
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)
1670 static int intel_float_operand
PARAMS ((const char *mnemonic
));
1673 intel_float_operand (mnemonic
)
1674 const char *mnemonic
;
1676 /* Note that the value returned is meaningful only for opcodes with (memory)
1677 operands, hence the code here is free to improperly handle opcodes that
1678 have no operands (for better performance and smaller code). */
1680 if (mnemonic
[0] != 'f')
1681 return 0; /* non-math */
1683 switch (mnemonic
[1])
1685 /* fclex, fdecstp, fdisi, femms, feni, fincstp, finit, fsetpm, and
1686 the fs segment override prefix not currently handled because no
1687 call path can make opcodes without operands get here */
1689 return 2 /* integer op */;
1691 if (mnemonic
[2] == 'd' && (mnemonic
[3] == 'c' || mnemonic
[3] == 'e'))
1692 return 3; /* fldcw/fldenv */
1695 if (mnemonic
[2] != 'o' /* fnop */)
1696 return 3; /* non-waiting control op */
1699 if (mnemonic
[2] == 's')
1700 return 3; /* frstor/frstpm */
1703 if (mnemonic
[2] == 'a')
1704 return 3; /* fsave */
1705 if (mnemonic
[2] == 't')
1707 switch (mnemonic
[3])
1709 case 'c': /* fstcw */
1710 case 'd': /* fstdw */
1711 case 'e': /* fstenv */
1712 case 's': /* fsts[gw] */
1718 if (mnemonic
[2] == 'r' || mnemonic
[2] == 's')
1719 return 0; /* fxsave/fxrstor are not really math ops */
1726 /* This is the guts of the machine-dependent assembler. LINE points to a
1727 machine dependent instruction. This function is supposed to emit
1728 the frags/bytes it assembles to. */
1735 char mnemonic
[MAX_MNEM_SIZE
];
1737 /* Initialize globals. */
1738 memset (&i
, '\0', sizeof (i
));
1739 for (j
= 0; j
< MAX_OPERANDS
; j
++)
1740 i
.reloc
[j
] = NO_RELOC
;
1741 memset (disp_expressions
, '\0', sizeof (disp_expressions
));
1742 memset (im_expressions
, '\0', sizeof (im_expressions
));
1743 save_stack_p
= save_stack
;
1745 /* First parse an instruction mnemonic & call i386_operand for the operands.
1746 We assume that the scrubber has arranged it so that line[0] is the valid
1747 start of a (possibly prefixed) mnemonic. */
1749 line
= parse_insn (line
, mnemonic
);
1753 line
= parse_operands (line
, mnemonic
);
1757 /* The order of the immediates should be reversed
1758 for 2 immediates extrq and insertq instructions */
1759 if ((i
.imm_operands
== 2) &&
1760 ((strcmp (mnemonic
, "extrq") == 0)
1761 || (strcmp (mnemonic
, "insertq") == 0)))
1763 swap_imm_operands ();
1764 /* "extrq" and insertq" are the only two instructions whose operands
1765 have to be reversed even though they have two immediate operands.
1771 /* Now we've parsed the mnemonic into a set of templates, and have the
1772 operands at hand. */
1774 /* All intel opcodes have reversed operands except for "bound" and
1775 "enter". We also don't reverse intersegment "jmp" and "call"
1776 instructions with 2 immediate operands so that the immediate segment
1777 precedes the offset, as it does when in AT&T mode. */
1778 if (intel_syntax
&& i
.operands
> 1
1779 && (strcmp (mnemonic
, "bound") != 0)
1780 && (strcmp (mnemonic
, "invlpga") != 0)
1781 && !((i
.types
[0] & Imm
) && (i
.types
[1] & Imm
)))
1787 /* Don't optimize displacement for movabs since it only takes 64bit
1790 && (flag_code
!= CODE_64BIT
1791 || strcmp (mnemonic
, "movabs") != 0))
1794 /* Next, we find a template that matches the given insn,
1795 making sure the overlap of the given operands types is consistent
1796 with the template operand types. */
1798 if (!match_template ())
1803 /* Undo SYSV386_COMPAT brokenness when in Intel mode. See i386.h */
1805 && (i
.tm
.base_opcode
& 0xfffffde0) == 0xdce0)
1806 i
.tm
.base_opcode
^= FloatR
;
1808 /* Zap movzx and movsx suffix. The suffix may have been set from
1809 "word ptr" or "byte ptr" on the source operand, but we'll use
1810 the suffix later to choose the destination register. */
1811 if ((i
.tm
.base_opcode
& ~9) == 0x0fb6)
1813 if (i
.reg_operands
< 2
1815 && (~i
.tm
.opcode_modifier
1822 as_bad (_("ambiguous operand size for `%s'"), i
.tm
.name
);
1828 if (i
.tm
.opcode_modifier
& FWait
)
1829 if (!add_prefix (FWAIT_OPCODE
))
1832 /* Check string instruction segment overrides. */
1833 if ((i
.tm
.opcode_modifier
& IsString
) != 0 && i
.mem_operands
!= 0)
1835 if (!check_string ())
1839 if (!process_suffix ())
1842 /* Make still unresolved immediate matches conform to size of immediate
1843 given in i.suffix. */
1844 if (!finalize_imm ())
1847 if (i
.types
[0] & Imm1
)
1848 i
.imm_operands
= 0; /* kludge for shift insns. */
1849 if (i
.types
[0] & ImplicitRegister
)
1851 if (i
.types
[1] & ImplicitRegister
)
1853 if (i
.types
[2] & ImplicitRegister
)
1856 if (i
.tm
.opcode_modifier
& ImmExt
)
1860 if ((i
.tm
.cpu_flags
& CpuSSE3
) && i
.operands
> 0)
1862 /* Streaming SIMD extensions 3 Instructions have the fixed
1863 operands with an opcode suffix which is coded in the same
1864 place as an 8-bit immediate field would be. Here we check
1865 those operands and remove them afterwards. */
1868 for (x
= 0; x
< i
.operands
; x
++)
1869 if (i
.op
[x
].regs
->reg_num
!= x
)
1870 as_bad (_("can't use register '%%%s' as operand %d in '%s'."),
1871 i
.op
[x
].regs
->reg_name
, x
+ 1, i
.tm
.name
);
1875 /* These AMD 3DNow! and Intel Katmai New Instructions have an
1876 opcode suffix which is coded in the same place as an 8-bit
1877 immediate field would be. Here we fake an 8-bit immediate
1878 operand from the opcode suffix stored in tm.extension_opcode. */
1880 assert (i
.imm_operands
== 0 && i
.operands
<= 2 && 2 < MAX_OPERANDS
);
1882 exp
= &im_expressions
[i
.imm_operands
++];
1883 i
.op
[i
.operands
].imms
= exp
;
1884 i
.types
[i
.operands
++] = Imm8
;
1885 exp
->X_op
= O_constant
;
1886 exp
->X_add_number
= i
.tm
.extension_opcode
;
1887 i
.tm
.extension_opcode
= None
;
1890 /* For insns with operands there are more diddles to do to the opcode. */
1893 if (!process_operands ())
1896 else if (!quiet_warnings
&& (i
.tm
.opcode_modifier
& Ugh
) != 0)
1898 /* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc. */
1899 as_warn (_("translating to `%sp'"), i
.tm
.name
);
1902 /* Handle conversion of 'int $3' --> special int3 insn. */
1903 if (i
.tm
.base_opcode
== INT_OPCODE
&& i
.op
[0].imms
->X_add_number
== 3)
1905 i
.tm
.base_opcode
= INT3_OPCODE
;
1909 if ((i
.tm
.opcode_modifier
& (Jump
| JumpByte
| JumpDword
))
1910 && i
.op
[0].disps
->X_op
== O_constant
)
1912 /* Convert "jmp constant" (and "call constant") to a jump (call) to
1913 the absolute address given by the constant. Since ix86 jumps and
1914 calls are pc relative, we need to generate a reloc. */
1915 i
.op
[0].disps
->X_add_symbol
= &abs_symbol
;
1916 i
.op
[0].disps
->X_op
= O_symbol
;
1919 if ((i
.tm
.opcode_modifier
& Rex64
) != 0)
1920 i
.rex
|= REX_MODE64
;
1922 /* For 8 bit registers we need an empty rex prefix. Also if the
1923 instruction already has a prefix, we need to convert old
1924 registers to new ones. */
1926 if (((i
.types
[0] & Reg8
) != 0
1927 && (i
.op
[0].regs
->reg_flags
& RegRex64
) != 0)
1928 || ((i
.types
[1] & Reg8
) != 0
1929 && (i
.op
[1].regs
->reg_flags
& RegRex64
) != 0)
1930 || (((i
.types
[0] & Reg8
) != 0 || (i
.types
[1] & Reg8
) != 0)
1935 i
.rex
|= REX_OPCODE
;
1936 for (x
= 0; x
< 2; x
++)
1938 /* Look for 8 bit operand that uses old registers. */
1939 if ((i
.types
[x
] & Reg8
) != 0
1940 && (i
.op
[x
].regs
->reg_flags
& RegRex64
) == 0)
1942 /* In case it is "hi" register, give up. */
1943 if (i
.op
[x
].regs
->reg_num
> 3)
1944 as_bad (_("can't encode register '%%%s' in an instruction requiring REX prefix."),
1945 i
.op
[x
].regs
->reg_name
);
1947 /* Otherwise it is equivalent to the extended register.
1948 Since the encoding doesn't change this is merely
1949 cosmetic cleanup for debug output. */
1951 i
.op
[x
].regs
= i
.op
[x
].regs
+ 8;
1957 add_prefix (REX_OPCODE
| i
.rex
);
1959 /* We are ready to output the insn. */
1964 parse_insn (line
, mnemonic
)
1969 char *token_start
= l
;
1974 /* Non-zero if we found a prefix only acceptable with string insns. */
1975 const char *expecting_string_instruction
= NULL
;
1980 while ((*mnem_p
= mnemonic_chars
[(unsigned char) *l
]) != 0)
1983 if (mnem_p
>= mnemonic
+ MAX_MNEM_SIZE
)
1985 as_bad (_("no such instruction: `%s'"), token_start
);
1990 if (!is_space_char (*l
)
1991 && *l
!= END_OF_INSN
1993 || (*l
!= PREFIX_SEPARATOR
1996 as_bad (_("invalid character %s in mnemonic"),
1997 output_invalid (*l
));
2000 if (token_start
== l
)
2002 if (!intel_syntax
&& *l
== PREFIX_SEPARATOR
)
2003 as_bad (_("expecting prefix; got nothing"));
2005 as_bad (_("expecting mnemonic; got nothing"));
2009 /* Look up instruction (or prefix) via hash table. */
2010 current_templates
= hash_find (op_hash
, mnemonic
);
2012 if (*l
!= END_OF_INSN
2013 && (!is_space_char (*l
) || l
[1] != END_OF_INSN
)
2014 && current_templates
2015 && (current_templates
->start
->opcode_modifier
& IsPrefix
))
2017 if (current_templates
->start
->cpu_flags
2018 & (flag_code
!= CODE_64BIT
? Cpu64
: CpuNo64
))
2020 as_bad ((flag_code
!= CODE_64BIT
2021 ? _("`%s' is only supported in 64-bit mode")
2022 : _("`%s' is not supported in 64-bit mode")),
2023 current_templates
->start
->name
);
2026 /* If we are in 16-bit mode, do not allow addr16 or data16.
2027 Similarly, in 32-bit mode, do not allow addr32 or data32. */
2028 if ((current_templates
->start
->opcode_modifier
& (Size16
| Size32
))
2029 && flag_code
!= CODE_64BIT
2030 && (((current_templates
->start
->opcode_modifier
& Size32
) != 0)
2031 ^ (flag_code
== CODE_16BIT
)))
2033 as_bad (_("redundant %s prefix"),
2034 current_templates
->start
->name
);
2037 /* Add prefix, checking for repeated prefixes. */
2038 switch (add_prefix (current_templates
->start
->base_opcode
))
2043 expecting_string_instruction
= current_templates
->start
->name
;
2046 /* Skip past PREFIX_SEPARATOR and reset token_start. */
2053 if (!current_templates
)
2055 /* See if we can get a match by trimming off a suffix. */
2058 case WORD_MNEM_SUFFIX
:
2059 if (intel_syntax
&& (intel_float_operand (mnemonic
) & 2))
2060 i
.suffix
= SHORT_MNEM_SUFFIX
;
2062 case BYTE_MNEM_SUFFIX
:
2063 case QWORD_MNEM_SUFFIX
:
2064 i
.suffix
= mnem_p
[-1];
2066 current_templates
= hash_find (op_hash
, mnemonic
);
2068 case SHORT_MNEM_SUFFIX
:
2069 case LONG_MNEM_SUFFIX
:
2072 i
.suffix
= mnem_p
[-1];
2074 current_templates
= hash_find (op_hash
, mnemonic
);
2082 if (intel_float_operand (mnemonic
) == 1)
2083 i
.suffix
= SHORT_MNEM_SUFFIX
;
2085 i
.suffix
= LONG_MNEM_SUFFIX
;
2087 current_templates
= hash_find (op_hash
, mnemonic
);
2091 if (!current_templates
)
2093 as_bad (_("no such instruction: `%s'"), token_start
);
2098 if (current_templates
->start
->opcode_modifier
& (Jump
| JumpByte
))
2100 /* Check for a branch hint. We allow ",pt" and ",pn" for
2101 predict taken and predict not taken respectively.
2102 I'm not sure that branch hints actually do anything on loop
2103 and jcxz insns (JumpByte) for current Pentium4 chips. They
2104 may work in the future and it doesn't hurt to accept them
2106 if (l
[0] == ',' && l
[1] == 'p')
2110 if (!add_prefix (DS_PREFIX_OPCODE
))
2114 else if (l
[2] == 'n')
2116 if (!add_prefix (CS_PREFIX_OPCODE
))
2122 /* Any other comma loses. */
2125 as_bad (_("invalid character %s in mnemonic"),
2126 output_invalid (*l
));
2130 /* Check if instruction is supported on specified architecture. */
2132 for (t
= current_templates
->start
; t
< current_templates
->end
; ++t
)
2134 if (!((t
->cpu_flags
& ~(Cpu64
| CpuNo64
))
2135 & ~(cpu_arch_flags
& ~(Cpu64
| CpuNo64
))))
2137 if (!(t
->cpu_flags
& (flag_code
== CODE_64BIT
? CpuNo64
: Cpu64
)))
2140 if (!(supported
& 2))
2142 as_bad (flag_code
== CODE_64BIT
2143 ? _("`%s' is not supported in 64-bit mode")
2144 : _("`%s' is only supported in 64-bit mode"),
2145 current_templates
->start
->name
);
2148 if (!(supported
& 1))
2150 as_warn (_("`%s' is not supported on `%s%s'"),
2151 current_templates
->start
->name
,
2153 cpu_sub_arch_name
? cpu_sub_arch_name
: "");
2155 else if ((Cpu386
& ~cpu_arch_flags
) && (flag_code
!= CODE_16BIT
))
2157 as_warn (_("use .code16 to ensure correct addressing mode"));
2160 /* Check for rep/repne without a string instruction. */
2161 if (expecting_string_instruction
)
2163 static templates override
;
2165 for (t
= current_templates
->start
; t
< current_templates
->end
; ++t
)
2166 if (t
->opcode_modifier
& IsString
)
2168 if (t
>= current_templates
->end
)
2170 as_bad (_("expecting string instruction after `%s'"),
2171 expecting_string_instruction
);
2174 for (override
.start
= t
; t
< current_templates
->end
; ++t
)
2175 if (!(t
->opcode_modifier
& IsString
))
2178 current_templates
= &override
;
2185 parse_operands (l
, mnemonic
)
2187 const char *mnemonic
;
2191 /* 1 if operand is pending after ','. */
2192 unsigned int expecting_operand
= 0;
2194 /* Non-zero if operand parens not balanced. */
2195 unsigned int paren_not_balanced
;
2197 while (*l
!= END_OF_INSN
)
2199 /* Skip optional white space before operand. */
2200 if (is_space_char (*l
))
2202 if (!is_operand_char (*l
) && *l
!= END_OF_INSN
)
2204 as_bad (_("invalid character %s before operand %d"),
2205 output_invalid (*l
),
2209 token_start
= l
; /* after white space */
2210 paren_not_balanced
= 0;
2211 while (paren_not_balanced
|| *l
!= ',')
2213 if (*l
== END_OF_INSN
)
2215 if (paren_not_balanced
)
2218 as_bad (_("unbalanced parenthesis in operand %d."),
2221 as_bad (_("unbalanced brackets in operand %d."),
2226 break; /* we are done */
2228 else if (!is_operand_char (*l
) && !is_space_char (*l
))
2230 as_bad (_("invalid character %s in operand %d"),
2231 output_invalid (*l
),
2238 ++paren_not_balanced
;
2240 --paren_not_balanced
;
2245 ++paren_not_balanced
;
2247 --paren_not_balanced
;
2251 if (l
!= token_start
)
2252 { /* Yes, we've read in another operand. */
2253 unsigned int operand_ok
;
2254 this_operand
= i
.operands
++;
2255 if (i
.operands
> MAX_OPERANDS
)
2257 as_bad (_("spurious operands; (%d operands/instruction max)"),
2261 /* Now parse operand adding info to 'i' as we go along. */
2262 END_STRING_AND_SAVE (l
);
2266 i386_intel_operand (token_start
,
2267 intel_float_operand (mnemonic
));
2269 operand_ok
= i386_operand (token_start
);
2271 RESTORE_END_STRING (l
);
2277 if (expecting_operand
)
2279 expecting_operand_after_comma
:
2280 as_bad (_("expecting operand after ','; got nothing"));
2285 as_bad (_("expecting operand before ','; got nothing"));
2290 /* Now *l must be either ',' or END_OF_INSN. */
2293 if (*++l
== END_OF_INSN
)
2295 /* Just skip it, if it's \n complain. */
2296 goto expecting_operand_after_comma
;
2298 expecting_operand
= 1;
2305 swap_imm_operands ()
2307 union i386_op temp_op
;
2308 unsigned int temp_type
;
2309 enum bfd_reloc_code_real temp_reloc
;
2313 temp_type
= i
.types
[xchg2
];
2314 i
.types
[xchg2
] = i
.types
[xchg1
];
2315 i
.types
[xchg1
] = temp_type
;
2316 temp_op
= i
.op
[xchg2
];
2317 i
.op
[xchg2
] = i
.op
[xchg1
];
2318 i
.op
[xchg1
] = temp_op
;
2319 temp_reloc
= i
.reloc
[xchg2
];
2320 i
.reloc
[xchg2
] = i
.reloc
[xchg1
];
2321 i
.reloc
[xchg1
] = temp_reloc
;
2328 union i386_op temp_op
;
2329 unsigned int temp_type
;
2330 enum bfd_reloc_code_real temp_reloc
;
2334 if (i
.operands
== 4)
2335 /* There will be two exchanges in a 4 operand instruction.
2336 First exchange is the done inside this block.(1st and 4rth operand)
2337 The next exchange is done outside this block.(2nd and 3rd operand) */
2341 temp_type
= i
.types
[xchg2
];
2342 i
.types
[xchg2
] = i
.types
[xchg1
];
2343 i
.types
[xchg1
] = temp_type
;
2344 temp_op
= i
.op
[xchg2
];
2345 i
.op
[xchg2
] = i
.op
[xchg1
];
2346 i
.op
[xchg1
] = temp_op
;
2347 temp_reloc
= i
.reloc
[xchg2
];
2348 i
.reloc
[xchg2
] = i
.reloc
[xchg1
];
2349 i
.reloc
[xchg1
] = temp_reloc
;
2354 if (i
.operands
== 2)
2359 else if (i
.operands
== 3)
2364 temp_type
= i
.types
[xchg2
];
2365 i
.types
[xchg2
] = i
.types
[xchg1
];
2366 i
.types
[xchg1
] = temp_type
;
2367 temp_op
= i
.op
[xchg2
];
2368 i
.op
[xchg2
] = i
.op
[xchg1
];
2369 i
.op
[xchg1
] = temp_op
;
2370 temp_reloc
= i
.reloc
[xchg2
];
2371 i
.reloc
[xchg2
] = i
.reloc
[xchg1
];
2372 i
.reloc
[xchg1
] = temp_reloc
;
2374 if (i
.mem_operands
== 2)
2376 const seg_entry
*temp_seg
;
2377 temp_seg
= i
.seg
[0];
2378 i
.seg
[0] = i
.seg
[1];
2379 i
.seg
[1] = temp_seg
;
2383 /* Try to ensure constant immediates are represented in the smallest
2388 char guess_suffix
= 0;
2392 guess_suffix
= i
.suffix
;
2393 else if (i
.reg_operands
)
2395 /* Figure out a suffix from the last register operand specified.
2396 We can't do this properly yet, ie. excluding InOutPortReg,
2397 but the following works for instructions with immediates.
2398 In any case, we can't set i.suffix yet. */
2399 for (op
= i
.operands
; --op
>= 0;)
2400 if (i
.types
[op
] & Reg
)
2402 if (i
.types
[op
] & Reg8
)
2403 guess_suffix
= BYTE_MNEM_SUFFIX
;
2404 else if (i
.types
[op
] & Reg16
)
2405 guess_suffix
= WORD_MNEM_SUFFIX
;
2406 else if (i
.types
[op
] & Reg32
)
2407 guess_suffix
= LONG_MNEM_SUFFIX
;
2408 else if (i
.types
[op
] & Reg64
)
2409 guess_suffix
= QWORD_MNEM_SUFFIX
;
2413 else if ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[DATA_PREFIX
] != 0))
2414 guess_suffix
= WORD_MNEM_SUFFIX
;
2416 for (op
= i
.operands
; --op
>= 0;)
2417 if (i
.types
[op
] & Imm
)
2419 switch (i
.op
[op
].imms
->X_op
)
2422 /* If a suffix is given, this operand may be shortened. */
2423 switch (guess_suffix
)
2425 case LONG_MNEM_SUFFIX
:
2426 i
.types
[op
] |= Imm32
| Imm64
;
2428 case WORD_MNEM_SUFFIX
:
2429 i
.types
[op
] |= Imm16
| Imm32S
| Imm32
| Imm64
;
2431 case BYTE_MNEM_SUFFIX
:
2432 i
.types
[op
] |= Imm16
| Imm8
| Imm8S
| Imm32S
| Imm32
| Imm64
;
2436 /* If this operand is at most 16 bits, convert it
2437 to a signed 16 bit number before trying to see
2438 whether it will fit in an even smaller size.
2439 This allows a 16-bit operand such as $0xffe0 to
2440 be recognised as within Imm8S range. */
2441 if ((i
.types
[op
] & Imm16
)
2442 && (i
.op
[op
].imms
->X_add_number
& ~(offsetT
) 0xffff) == 0)
2444 i
.op
[op
].imms
->X_add_number
=
2445 (((i
.op
[op
].imms
->X_add_number
& 0xffff) ^ 0x8000) - 0x8000);
2447 if ((i
.types
[op
] & Imm32
)
2448 && ((i
.op
[op
].imms
->X_add_number
& ~(((offsetT
) 2 << 31) - 1))
2451 i
.op
[op
].imms
->X_add_number
= ((i
.op
[op
].imms
->X_add_number
2452 ^ ((offsetT
) 1 << 31))
2453 - ((offsetT
) 1 << 31));
2455 i
.types
[op
] |= smallest_imm_type (i
.op
[op
].imms
->X_add_number
);
2457 /* We must avoid matching of Imm32 templates when 64bit
2458 only immediate is available. */
2459 if (guess_suffix
== QWORD_MNEM_SUFFIX
)
2460 i
.types
[op
] &= ~Imm32
;
2467 /* Symbols and expressions. */
2469 /* Convert symbolic operand to proper sizes for matching, but don't
2470 prevent matching a set of insns that only supports sizes other
2471 than those matching the insn suffix. */
2473 unsigned int mask
, allowed
= 0;
2476 for (t
= current_templates
->start
; t
< current_templates
->end
; ++t
)
2477 allowed
|= t
->operand_types
[op
];
2478 switch (guess_suffix
)
2480 case QWORD_MNEM_SUFFIX
:
2481 mask
= Imm64
| Imm32S
;
2483 case LONG_MNEM_SUFFIX
:
2486 case WORD_MNEM_SUFFIX
:
2489 case BYTE_MNEM_SUFFIX
:
2497 i
.types
[op
] &= mask
;
2504 /* Try to use the smallest displacement type too. */
2510 for (op
= i
.operands
; --op
>= 0;)
2511 if (i
.types
[op
] & Disp
)
2513 if (i
.op
[op
].disps
->X_op
== O_constant
)
2515 offsetT disp
= i
.op
[op
].disps
->X_add_number
;
2517 if ((i
.types
[op
] & Disp16
)
2518 && (disp
& ~(offsetT
) 0xffff) == 0)
2520 /* If this operand is at most 16 bits, convert
2521 to a signed 16 bit number and don't use 64bit
2523 disp
= (((disp
& 0xffff) ^ 0x8000) - 0x8000);
2524 i
.types
[op
] &= ~Disp64
;
2526 if ((i
.types
[op
] & Disp32
)
2527 && (disp
& ~(((offsetT
) 2 << 31) - 1)) == 0)
2529 /* If this operand is at most 32 bits, convert
2530 to a signed 32 bit number and don't use 64bit
2532 disp
&= (((offsetT
) 2 << 31) - 1);
2533 disp
= (disp
^ ((offsetT
) 1 << 31)) - ((addressT
) 1 << 31);
2534 i
.types
[op
] &= ~Disp64
;
2536 if (!disp
&& (i
.types
[op
] & BaseIndex
))
2538 i
.types
[op
] &= ~Disp
;
2542 else if (flag_code
== CODE_64BIT
)
2544 if (fits_in_signed_long (disp
))
2546 i
.types
[op
] &= ~Disp64
;
2547 i
.types
[op
] |= Disp32S
;
2549 if (fits_in_unsigned_long (disp
))
2550 i
.types
[op
] |= Disp32
;
2552 if ((i
.types
[op
] & (Disp32
| Disp32S
| Disp16
))
2553 && fits_in_signed_byte (disp
))
2554 i
.types
[op
] |= Disp8
;
2556 else if (i
.reloc
[op
] == BFD_RELOC_386_TLS_DESC_CALL
2557 || i
.reloc
[op
] == BFD_RELOC_X86_64_TLSDESC_CALL
)
2559 fix_new_exp (frag_now
, frag_more (0) - frag_now
->fr_literal
, 0,
2560 i
.op
[op
].disps
, 0, i
.reloc
[op
]);
2561 i
.types
[op
] &= ~Disp
;
2564 /* We only support 64bit displacement on constants. */
2565 i
.types
[op
] &= ~Disp64
;
2572 /* Points to template once we've found it. */
2574 unsigned int overlap0
, overlap1
, overlap2
, overlap3
;
2575 unsigned int found_reverse_match
;
2577 unsigned int operand_types
[MAX_OPERANDS
];
2578 int addr_prefix_disp
;
2581 #if MAX_OPERANDS != 4
2582 # error "MAX_OPERANDS must be 4."
2585 #define MATCH(overlap, given, template) \
2586 ((overlap & ~JumpAbsolute) \
2587 && (((given) & (BaseIndex | JumpAbsolute)) \
2588 == ((overlap) & (BaseIndex | JumpAbsolute))))
2590 /* If given types r0 and r1 are registers they must be of the same type
2591 unless the expected operand type register overlap is null.
2592 Note that Acc in a template matches every size of reg. */
2593 #define CONSISTENT_REGISTER_MATCH(m0, g0, t0, m1, g1, t1) \
2594 (((g0) & Reg) == 0 || ((g1) & Reg) == 0 \
2595 || ((g0) & Reg) == ((g1) & Reg) \
2596 || ((((m0) & Acc) ? Reg : (t0)) & (((m1) & Acc) ? Reg : (t1)) & Reg) == 0 )
2602 found_reverse_match
= 0;
2603 for (j
= 0; j
< MAX_OPERANDS
; j
++)
2604 operand_types
[j
] = 0;
2605 addr_prefix_disp
= -1;
2606 suffix_check
= (i
.suffix
== BYTE_MNEM_SUFFIX
2608 : (i
.suffix
== WORD_MNEM_SUFFIX
2610 : (i
.suffix
== SHORT_MNEM_SUFFIX
2612 : (i
.suffix
== LONG_MNEM_SUFFIX
2614 : (i
.suffix
== QWORD_MNEM_SUFFIX
2616 : (i
.suffix
== LONG_DOUBLE_MNEM_SUFFIX
2617 ? No_xSuf
: 0))))));
2619 for (t
= current_templates
->start
; t
< current_templates
->end
; t
++)
2621 addr_prefix_disp
= -1;
2623 /* Must have right number of operands. */
2624 if (i
.operands
!= t
->operands
)
2627 /* Check the suffix, except for some instructions in intel mode. */
2628 if ((t
->opcode_modifier
& suffix_check
)
2630 && (t
->opcode_modifier
& IgnoreSize
)))
2633 for (j
= 0; j
< MAX_OPERANDS
; j
++)
2634 operand_types
[j
] = t
->operand_types
[j
];
2636 /* In general, don't allow 64-bit operands in 32-bit mode. */
2637 if (i
.suffix
== QWORD_MNEM_SUFFIX
2638 && flag_code
!= CODE_64BIT
2640 ? (!(t
->opcode_modifier
& IgnoreSize
)
2641 && !intel_float_operand (t
->name
))
2642 : intel_float_operand (t
->name
) != 2)
2643 && (!(operand_types
[0] & (RegMMX
| RegXMM
))
2644 || !(operand_types
[t
->operands
> 1] & (RegMMX
| RegXMM
)))
2645 && (t
->base_opcode
!= 0x0fc7
2646 || t
->extension_opcode
!= 1 /* cmpxchg8b */))
2649 /* Do not verify operands when there are none. */
2650 else if (!t
->operands
)
2652 if (t
->cpu_flags
& ~cpu_arch_flags
)
2654 /* We've found a match; break out of loop. */
2658 /* Address size prefix will turn Disp64/Disp32/Disp16 operand
2659 into Disp32/Disp16/Disp32 operand. */
2660 if (i
.prefix
[ADDR_PREFIX
] != 0)
2662 unsigned int DispOn
= 0, DispOff
= 0;
2680 for (j
= 0; j
< MAX_OPERANDS
; j
++)
2682 /* There should be only one Disp operand. */
2683 if ((operand_types
[j
] & DispOff
))
2685 addr_prefix_disp
= j
;
2686 operand_types
[j
] |= DispOn
;
2687 operand_types
[j
] &= ~DispOff
;
2693 overlap0
= i
.types
[0] & operand_types
[0];
2694 switch (t
->operands
)
2697 if (!MATCH (overlap0
, i
.types
[0], operand_types
[0]))
2703 overlap1
= i
.types
[1] & operand_types
[1];
2704 if (!MATCH (overlap0
, i
.types
[0], operand_types
[0])
2705 || !MATCH (overlap1
, i
.types
[1], operand_types
[1])
2706 /* monitor in SSE3 is a very special case. The first
2707 register and the second register may have different
2709 || !((t
->base_opcode
== 0x0f01
2710 && t
->extension_opcode
== 0xc8)
2711 || CONSISTENT_REGISTER_MATCH (overlap0
, i
.types
[0],
2713 overlap1
, i
.types
[1],
2716 /* Check if other direction is valid ... */
2717 if ((t
->opcode_modifier
& (D
| FloatD
)) == 0)
2720 /* Try reversing direction of operands. */
2721 overlap0
= i
.types
[0] & operand_types
[1];
2722 overlap1
= i
.types
[1] & operand_types
[0];
2723 if (!MATCH (overlap0
, i
.types
[0], operand_types
[1])
2724 || !MATCH (overlap1
, i
.types
[1], operand_types
[0])
2725 || !CONSISTENT_REGISTER_MATCH (overlap0
, i
.types
[0],
2727 overlap1
, i
.types
[1],
2730 /* Does not match either direction. */
2733 /* found_reverse_match holds which of D or FloatDR
2735 found_reverse_match
= t
->opcode_modifier
& (D
| FloatDR
);
2739 /* Found a forward 2 operand match here. */
2740 switch (t
->operands
)
2743 overlap3
= i
.types
[3] & operand_types
[3];
2745 overlap2
= i
.types
[2] & operand_types
[2];
2749 switch (t
->operands
)
2752 if (!MATCH (overlap3
, i
.types
[3], operand_types
[3])
2753 || !CONSISTENT_REGISTER_MATCH (overlap2
,
2761 /* Here we make use of the fact that there are no
2762 reverse match 3 operand instructions, and all 3
2763 operand instructions only need to be checked for
2764 register consistency between operands 2 and 3. */
2765 if (!MATCH (overlap2
, i
.types
[2], operand_types
[2])
2766 || !CONSISTENT_REGISTER_MATCH (overlap1
,
2776 /* Found either forward/reverse 2, 3 or 4 operand match here:
2777 slip through to break. */
2779 if (t
->cpu_flags
& ~cpu_arch_flags
)
2781 found_reverse_match
= 0;
2784 /* We've found a match; break out of loop. */
2788 if (t
== current_templates
->end
)
2790 /* We found no match. */
2791 as_bad (_("suffix or operands invalid for `%s'"),
2792 current_templates
->start
->name
);
2796 if (!quiet_warnings
)
2799 && ((i
.types
[0] & JumpAbsolute
)
2800 != (operand_types
[0] & JumpAbsolute
)))
2802 as_warn (_("indirect %s without `*'"), t
->name
);
2805 if ((t
->opcode_modifier
& (IsPrefix
| IgnoreSize
))
2806 == (IsPrefix
| IgnoreSize
))
2808 /* Warn them that a data or address size prefix doesn't
2809 affect assembly of the next line of code. */
2810 as_warn (_("stand-alone `%s' prefix"), t
->name
);
2814 /* Copy the template we found. */
2817 if (addr_prefix_disp
!= -1)
2818 i
.tm
.operand_types
[addr_prefix_disp
]
2819 = operand_types
[addr_prefix_disp
];
2821 if (found_reverse_match
)
2823 /* If we found a reverse match we must alter the opcode
2824 direction bit. found_reverse_match holds bits to change
2825 (different for int & float insns). */
2827 i
.tm
.base_opcode
^= found_reverse_match
;
2829 i
.tm
.operand_types
[0] = operand_types
[1];
2830 i
.tm
.operand_types
[1] = operand_types
[0];
2839 int mem_op
= (i
.types
[0] & AnyMem
) ? 0 : 1;
2840 if ((i
.tm
.operand_types
[mem_op
] & EsSeg
) != 0)
2842 if (i
.seg
[0] != NULL
&& i
.seg
[0] != &es
)
2844 as_bad (_("`%s' operand %d must use `%%es' segment"),
2849 /* There's only ever one segment override allowed per instruction.
2850 This instruction possibly has a legal segment override on the
2851 second operand, so copy the segment to where non-string
2852 instructions store it, allowing common code. */
2853 i
.seg
[0] = i
.seg
[1];
2855 else if ((i
.tm
.operand_types
[mem_op
+ 1] & EsSeg
) != 0)
2857 if (i
.seg
[1] != NULL
&& i
.seg
[1] != &es
)
2859 as_bad (_("`%s' operand %d must use `%%es' segment"),
2869 process_suffix (void)
2871 /* If matched instruction specifies an explicit instruction mnemonic
2873 if (i
.tm
.opcode_modifier
& (Size16
| Size32
| Size64
))
2875 if (i
.tm
.opcode_modifier
& Size16
)
2876 i
.suffix
= WORD_MNEM_SUFFIX
;
2877 else if (i
.tm
.opcode_modifier
& Size64
)
2878 i
.suffix
= QWORD_MNEM_SUFFIX
;
2880 i
.suffix
= LONG_MNEM_SUFFIX
;
2882 else if (i
.reg_operands
)
2884 /* If there's no instruction mnemonic suffix we try to invent one
2885 based on register operands. */
2888 /* We take i.suffix from the last register operand specified,
2889 Destination register type is more significant than source
2893 for (op
= i
.operands
; --op
>= 0;)
2894 if ((i
.types
[op
] & Reg
)
2895 && !(i
.tm
.operand_types
[op
] & InOutPortReg
))
2897 i
.suffix
= ((i
.types
[op
] & Reg8
) ? BYTE_MNEM_SUFFIX
:
2898 (i
.types
[op
] & Reg16
) ? WORD_MNEM_SUFFIX
:
2899 (i
.types
[op
] & Reg64
) ? QWORD_MNEM_SUFFIX
:
2904 else if (i
.suffix
== BYTE_MNEM_SUFFIX
)
2906 if (!check_byte_reg ())
2909 else if (i
.suffix
== LONG_MNEM_SUFFIX
)
2911 if (!check_long_reg ())
2914 else if (i
.suffix
== QWORD_MNEM_SUFFIX
)
2916 if (!check_qword_reg ())
2919 else if (i
.suffix
== WORD_MNEM_SUFFIX
)
2921 if (!check_word_reg ())
2924 else if (intel_syntax
&& (i
.tm
.opcode_modifier
& IgnoreSize
))
2925 /* Do nothing if the instruction is going to ignore the prefix. */
2930 else if ((i
.tm
.opcode_modifier
& DefaultSize
)
2932 /* exclude fldenv/frstor/fsave/fstenv */
2933 && (i
.tm
.opcode_modifier
& No_sSuf
))
2935 i
.suffix
= stackop_size
;
2937 else if (intel_syntax
2939 && ((i
.tm
.operand_types
[0] & JumpAbsolute
)
2940 || (i
.tm
.opcode_modifier
& (JumpByte
|JumpInterSegment
))
2941 || (i
.tm
.base_opcode
== 0x0f01 /* [ls][gi]dt */
2942 && i
.tm
.extension_opcode
<= 3)))
2947 if (!(i
.tm
.opcode_modifier
& No_qSuf
))
2949 i
.suffix
= QWORD_MNEM_SUFFIX
;
2953 if (!(i
.tm
.opcode_modifier
& No_lSuf
))
2954 i
.suffix
= LONG_MNEM_SUFFIX
;
2957 if (!(i
.tm
.opcode_modifier
& No_wSuf
))
2958 i
.suffix
= WORD_MNEM_SUFFIX
;
2967 if (i
.tm
.opcode_modifier
& W
)
2969 as_bad (_("no instruction mnemonic suffix given and no register operands; can't size instruction"));
2975 unsigned int suffixes
= (~i
.tm
.opcode_modifier
2983 if ((i
.tm
.opcode_modifier
& W
)
2984 || ((suffixes
& (suffixes
- 1))
2985 && !(i
.tm
.opcode_modifier
& (DefaultSize
| IgnoreSize
))))
2987 as_bad (_("ambiguous operand size for `%s'"), i
.tm
.name
);
2993 /* Change the opcode based on the operand size given by i.suffix;
2994 We don't need to change things for byte insns. */
2996 if (i
.suffix
&& i
.suffix
!= BYTE_MNEM_SUFFIX
)
2998 /* It's not a byte, select word/dword operation. */
2999 if (i
.tm
.opcode_modifier
& W
)
3001 if (i
.tm
.opcode_modifier
& ShortForm
)
3002 i
.tm
.base_opcode
|= 8;
3004 i
.tm
.base_opcode
|= 1;
3007 /* Now select between word & dword operations via the operand
3008 size prefix, except for instructions that will ignore this
3010 if (i
.tm
.base_opcode
== 0x0f01 && i
.tm
.extension_opcode
== 0xc8)
3012 /* monitor in SSE3 is a very special case. The default size
3013 of AX is the size of mode. The address size override
3014 prefix will change the size of AX. */
3015 if (i
.op
->regs
[0].reg_type
&
3016 (flag_code
== CODE_32BIT
? Reg16
: Reg32
))
3017 if (!add_prefix (ADDR_PREFIX_OPCODE
))
3020 else if (i
.suffix
!= QWORD_MNEM_SUFFIX
3021 && i
.suffix
!= LONG_DOUBLE_MNEM_SUFFIX
3022 && !(i
.tm
.opcode_modifier
& (IgnoreSize
| FloatMF
))
3023 && ((i
.suffix
== LONG_MNEM_SUFFIX
) == (flag_code
== CODE_16BIT
)
3024 || (flag_code
== CODE_64BIT
3025 && (i
.tm
.opcode_modifier
& JumpByte
))))
3027 unsigned int prefix
= DATA_PREFIX_OPCODE
;
3029 if (i
.tm
.opcode_modifier
& JumpByte
) /* jcxz, loop */
3030 prefix
= ADDR_PREFIX_OPCODE
;
3032 if (!add_prefix (prefix
))
3036 /* Set mode64 for an operand. */
3037 if (i
.suffix
== QWORD_MNEM_SUFFIX
3038 && flag_code
== CODE_64BIT
3039 && (i
.tm
.opcode_modifier
& NoRex64
) == 0)
3041 /* Special case for xchg %rax,%rax. It is NOP and doesn't
3044 || i
.types
[0] != (Acc
| Reg64
)
3045 || i
.types
[1] != (Acc
| Reg64
)
3046 || strcmp (i
.tm
.name
, "xchg") != 0)
3047 i
.rex
|= REX_MODE64
;
3050 /* Size floating point instruction. */
3051 if (i
.suffix
== LONG_MNEM_SUFFIX
)
3052 if (i
.tm
.opcode_modifier
& FloatMF
)
3053 i
.tm
.base_opcode
^= 4;
3060 check_byte_reg (void)
3064 for (op
= i
.operands
; --op
>= 0;)
3066 /* If this is an eight bit register, it's OK. If it's the 16 or
3067 32 bit version of an eight bit register, we will just use the
3068 low portion, and that's OK too. */
3069 if (i
.types
[op
] & Reg8
)
3072 /* movzx and movsx should not generate this warning. */
3074 && (i
.tm
.base_opcode
== 0xfb7
3075 || i
.tm
.base_opcode
== 0xfb6
3076 || i
.tm
.base_opcode
== 0x63
3077 || i
.tm
.base_opcode
== 0xfbe
3078 || i
.tm
.base_opcode
== 0xfbf))
3081 if ((i
.types
[op
] & WordReg
) && i
.op
[op
].regs
->reg_num
< 4)
3083 /* Prohibit these changes in the 64bit mode, since the
3084 lowering is more complicated. */
3085 if (flag_code
== CODE_64BIT
3086 && (i
.tm
.operand_types
[op
] & InOutPortReg
) == 0)
3088 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
3089 i
.op
[op
].regs
->reg_name
,
3093 #if REGISTER_WARNINGS
3095 && (i
.tm
.operand_types
[op
] & InOutPortReg
) == 0)
3096 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
3097 (i
.op
[op
].regs
+ (i
.types
[op
] & Reg16
3098 ? REGNAM_AL
- REGNAM_AX
3099 : REGNAM_AL
- REGNAM_EAX
))->reg_name
,
3100 i
.op
[op
].regs
->reg_name
,
3105 /* Any other register is bad. */
3106 if (i
.types
[op
] & (Reg
| RegMMX
| RegXMM
3108 | Control
| Debug
| Test
3109 | FloatReg
| FloatAcc
))
3111 as_bad (_("`%%%s' not allowed with `%s%c'"),
3112 i
.op
[op
].regs
->reg_name
,
3126 for (op
= i
.operands
; --op
>= 0;)
3127 /* Reject eight bit registers, except where the template requires
3128 them. (eg. movzb) */
3129 if ((i
.types
[op
] & Reg8
) != 0
3130 && (i
.tm
.operand_types
[op
] & (Reg16
| Reg32
| Acc
)) != 0)
3132 as_bad (_("`%%%s' not allowed with `%s%c'"),
3133 i
.op
[op
].regs
->reg_name
,
3138 /* Warn if the e prefix on a general reg is missing. */
3139 else if ((!quiet_warnings
|| flag_code
== CODE_64BIT
)
3140 && (i
.types
[op
] & Reg16
) != 0
3141 && (i
.tm
.operand_types
[op
] & (Reg32
| Acc
)) != 0)
3143 /* Prohibit these changes in the 64bit mode, since the
3144 lowering is more complicated. */
3145 if (flag_code
== CODE_64BIT
)
3147 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
3148 i
.op
[op
].regs
->reg_name
,
3152 #if REGISTER_WARNINGS
3154 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
3155 (i
.op
[op
].regs
+ REGNAM_EAX
- REGNAM_AX
)->reg_name
,
3156 i
.op
[op
].regs
->reg_name
,
3160 /* Warn if the r prefix on a general reg is missing. */
3161 else if ((i
.types
[op
] & Reg64
) != 0
3162 && (i
.tm
.operand_types
[op
] & (Reg32
| Acc
)) != 0)
3164 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
3165 i
.op
[op
].regs
->reg_name
,
3177 for (op
= i
.operands
; --op
>= 0; )
3178 /* Reject eight bit registers, except where the template requires
3179 them. (eg. movzb) */
3180 if ((i
.types
[op
] & Reg8
) != 0
3181 && (i
.tm
.operand_types
[op
] & (Reg16
| Reg32
| Acc
)) != 0)
3183 as_bad (_("`%%%s' not allowed with `%s%c'"),
3184 i
.op
[op
].regs
->reg_name
,
3189 /* Warn if the e prefix on a general reg is missing. */
3190 else if (((i
.types
[op
] & Reg16
) != 0
3191 || (i
.types
[op
] & Reg32
) != 0)
3192 && (i
.tm
.operand_types
[op
] & (Reg32
| Acc
)) != 0)
3194 /* Prohibit these changes in the 64bit mode, since the
3195 lowering is more complicated. */
3196 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
3197 i
.op
[op
].regs
->reg_name
,
3208 for (op
= i
.operands
; --op
>= 0;)
3209 /* Reject eight bit registers, except where the template requires
3210 them. (eg. movzb) */
3211 if ((i
.types
[op
] & Reg8
) != 0
3212 && (i
.tm
.operand_types
[op
] & (Reg16
| Reg32
| Acc
)) != 0)
3214 as_bad (_("`%%%s' not allowed with `%s%c'"),
3215 i
.op
[op
].regs
->reg_name
,
3220 /* Warn if the e prefix on a general reg is present. */
3221 else if ((!quiet_warnings
|| flag_code
== CODE_64BIT
)
3222 && (i
.types
[op
] & Reg32
) != 0
3223 && (i
.tm
.operand_types
[op
] & (Reg16
| Acc
)) != 0)
3225 /* Prohibit these changes in the 64bit mode, since the
3226 lowering is more complicated. */
3227 if (flag_code
== CODE_64BIT
)
3229 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
3230 i
.op
[op
].regs
->reg_name
,
3235 #if REGISTER_WARNINGS
3236 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
3237 (i
.op
[op
].regs
+ REGNAM_AX
- REGNAM_EAX
)->reg_name
,
3238 i
.op
[op
].regs
->reg_name
,
3248 unsigned int overlap0
, overlap1
, overlap2
;
3250 overlap0
= i
.types
[0] & i
.tm
.operand_types
[0];
3251 if ((overlap0
& (Imm8
| Imm8S
| Imm16
| Imm32
| Imm32S
| Imm64
))
3252 && overlap0
!= Imm8
&& overlap0
!= Imm8S
3253 && overlap0
!= Imm16
&& overlap0
!= Imm32S
3254 && overlap0
!= Imm32
&& overlap0
!= Imm64
)
3258 overlap0
&= (i
.suffix
== BYTE_MNEM_SUFFIX
3260 : (i
.suffix
== WORD_MNEM_SUFFIX
3262 : (i
.suffix
== QWORD_MNEM_SUFFIX
3266 else if (overlap0
== (Imm16
| Imm32S
| Imm32
)
3267 || overlap0
== (Imm16
| Imm32
)
3268 || overlap0
== (Imm16
| Imm32S
))
3270 overlap0
= ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[DATA_PREFIX
] != 0)
3273 if (overlap0
!= Imm8
&& overlap0
!= Imm8S
3274 && overlap0
!= Imm16
&& overlap0
!= Imm32S
3275 && overlap0
!= Imm32
&& overlap0
!= Imm64
)
3277 as_bad (_("no instruction mnemonic suffix given; can't determine immediate size"));
3281 i
.types
[0] = overlap0
;
3283 overlap1
= i
.types
[1] & i
.tm
.operand_types
[1];
3284 if ((overlap1
& (Imm8
| Imm8S
| Imm16
| Imm32S
| Imm32
| Imm64
))
3285 && overlap1
!= Imm8
&& overlap1
!= Imm8S
3286 && overlap1
!= Imm16
&& overlap1
!= Imm32S
3287 && overlap1
!= Imm32
&& overlap1
!= Imm64
)
3291 overlap1
&= (i
.suffix
== BYTE_MNEM_SUFFIX
3293 : (i
.suffix
== WORD_MNEM_SUFFIX
3295 : (i
.suffix
== QWORD_MNEM_SUFFIX
3299 else if (overlap1
== (Imm16
| Imm32
| Imm32S
)
3300 || overlap1
== (Imm16
| Imm32
)
3301 || overlap1
== (Imm16
| Imm32S
))
3303 overlap1
= ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[DATA_PREFIX
] != 0)
3306 if (overlap1
!= Imm8
&& overlap1
!= Imm8S
3307 && overlap1
!= Imm16
&& overlap1
!= Imm32S
3308 && overlap1
!= Imm32
&& overlap1
!= Imm64
)
3310 as_bad (_("no instruction mnemonic suffix given; can't determine immediate size %x %c"),overlap1
, i
.suffix
);
3314 i
.types
[1] = overlap1
;
3316 overlap2
= i
.types
[2] & i
.tm
.operand_types
[2];
3317 assert ((overlap2
& Imm
) == 0);
3318 i
.types
[2] = overlap2
;
3326 /* Default segment register this instruction will use for memory
3327 accesses. 0 means unknown. This is only for optimizing out
3328 unnecessary segment overrides. */
3329 const seg_entry
*default_seg
= 0;
3331 /* The imul $imm, %reg instruction is converted into
3332 imul $imm, %reg, %reg, and the clr %reg instruction
3333 is converted into xor %reg, %reg. */
3334 if (i
.tm
.opcode_modifier
& regKludge
)
3336 unsigned int first_reg_op
= (i
.types
[0] & Reg
) ? 0 : 1;
3337 /* Pretend we saw the extra register operand. */
3338 assert (i
.reg_operands
== 1
3339 && i
.op
[first_reg_op
+ 1].regs
== 0);
3340 i
.op
[first_reg_op
+ 1].regs
= i
.op
[first_reg_op
].regs
;
3341 i
.types
[first_reg_op
+ 1] = i
.types
[first_reg_op
];
3346 if (i
.tm
.opcode_modifier
& ShortForm
)
3348 /* The register or float register operand is in operand 0 or 1. */
3349 unsigned int op
= (i
.types
[0] & (Reg
| FloatReg
)) ? 0 : 1;
3350 /* Register goes in low 3 bits of opcode. */
3351 i
.tm
.base_opcode
|= i
.op
[op
].regs
->reg_num
;
3352 if ((i
.op
[op
].regs
->reg_flags
& RegRex
) != 0)
3354 if (!quiet_warnings
&& (i
.tm
.opcode_modifier
& Ugh
) != 0)
3356 /* Warn about some common errors, but press on regardless.
3357 The first case can be generated by gcc (<= 2.8.1). */
3358 if (i
.operands
== 2)
3360 /* Reversed arguments on faddp, fsubp, etc. */
3361 as_warn (_("translating to `%s %%%s,%%%s'"), i
.tm
.name
,
3362 i
.op
[1].regs
->reg_name
,
3363 i
.op
[0].regs
->reg_name
);
3367 /* Extraneous `l' suffix on fp insn. */
3368 as_warn (_("translating to `%s %%%s'"), i
.tm
.name
,
3369 i
.op
[0].regs
->reg_name
);
3373 else if (i
.tm
.opcode_modifier
& Modrm
)
3375 /* The opcode is completed (modulo i.tm.extension_opcode which
3376 must be put into the modrm byte). Now, we make the modrm and
3377 index base bytes based on all the info we've collected. */
3379 default_seg
= build_modrm_byte ();
3381 else if (i
.tm
.opcode_modifier
& (Seg2ShortForm
| Seg3ShortForm
))
3383 if (i
.tm
.base_opcode
== POP_SEG_SHORT
3384 && i
.op
[0].regs
->reg_num
== 1)
3386 as_bad (_("you can't `pop %%cs'"));
3389 i
.tm
.base_opcode
|= (i
.op
[0].regs
->reg_num
<< 3);
3390 if ((i
.op
[0].regs
->reg_flags
& RegRex
) != 0)
3393 else if ((i
.tm
.base_opcode
& ~(D
| W
)) == MOV_AX_DISP32
)
3397 else if ((i
.tm
.opcode_modifier
& IsString
) != 0)
3399 /* For the string instructions that allow a segment override
3400 on one of their operands, the default segment is ds. */
3404 if ((i
.tm
.base_opcode
== 0x8d /* lea */
3405 || (i
.tm
.cpu_flags
& CpuSVME
))
3406 && i
.seg
[0] && !quiet_warnings
)
3407 as_warn (_("segment override on `%s' is ineffectual"), i
.tm
.name
);
3409 /* If a segment was explicitly specified, and the specified segment
3410 is not the default, use an opcode prefix to select it. If we
3411 never figured out what the default segment is, then default_seg
3412 will be zero at this point, and the specified segment prefix will
3414 if ((i
.seg
[0]) && (i
.seg
[0] != default_seg
))
3416 if (!add_prefix (i
.seg
[0]->seg_prefix
))
3422 static const seg_entry
*
3425 const seg_entry
*default_seg
= 0;
3427 /* i.reg_operands MUST be the number of real register operands;
3428 implicit registers do not count. */
3429 if (i
.reg_operands
== 2)
3431 unsigned int source
, dest
;
3439 /* When there are 3 operands, one of them may be immediate,
3440 which may be the first or the last operand. Otherwise,
3441 the first operand must be shift count register (cl). */
3442 assert (i
.imm_operands
== 1
3443 || (i
.imm_operands
== 0
3444 && (i
.types
[0] & ShiftCount
)));
3445 source
= (i
.types
[0] & (Imm
| ShiftCount
)) ? 1 : 0;
3448 /* When there are 4 operands, the first two must be immediate
3449 operands. The source operand will be the 3rd one. */
3450 assert (i
.imm_operands
== 2
3451 && (i
.types
[0] & Imm
)
3452 && (i
.types
[1] & Imm
));
3462 /* One of the register operands will be encoded in the i.tm.reg
3463 field, the other in the combined i.tm.mode and i.tm.regmem
3464 fields. If no form of this instruction supports a memory
3465 destination operand, then we assume the source operand may
3466 sometimes be a memory operand and so we need to store the
3467 destination in the i.rm.reg field. */
3468 if ((i
.tm
.operand_types
[dest
] & AnyMem
) == 0)
3470 i
.rm
.reg
= i
.op
[dest
].regs
->reg_num
;
3471 i
.rm
.regmem
= i
.op
[source
].regs
->reg_num
;
3472 if ((i
.op
[dest
].regs
->reg_flags
& RegRex
) != 0)
3474 if ((i
.op
[source
].regs
->reg_flags
& RegRex
) != 0)
3479 i
.rm
.reg
= i
.op
[source
].regs
->reg_num
;
3480 i
.rm
.regmem
= i
.op
[dest
].regs
->reg_num
;
3481 if ((i
.op
[dest
].regs
->reg_flags
& RegRex
) != 0)
3483 if ((i
.op
[source
].regs
->reg_flags
& RegRex
) != 0)
3486 if (flag_code
!= CODE_64BIT
&& (i
.rex
& (REX_EXTX
| REX_EXTZ
)))
3488 if (!((i
.types
[0] | i
.types
[1]) & Control
))
3490 i
.rex
&= ~(REX_EXTX
| REX_EXTZ
);
3491 add_prefix (LOCK_PREFIX_OPCODE
);
3495 { /* If it's not 2 reg operands... */
3498 unsigned int fake_zero_displacement
= 0;
3499 unsigned int op
= ((i
.types
[0] & AnyMem
)
3501 : (i
.types
[1] & AnyMem
) ? 1 : 2);
3505 if (i
.base_reg
== 0)
3508 if (!i
.disp_operands
)
3509 fake_zero_displacement
= 1;
3510 if (i
.index_reg
== 0)
3512 /* Operand is just <disp> */
3513 if (flag_code
== CODE_64BIT
)
3515 /* 64bit mode overwrites the 32bit absolute
3516 addressing by RIP relative addressing and
3517 absolute addressing is encoded by one of the
3518 redundant SIB forms. */
3519 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
3520 i
.sib
.base
= NO_BASE_REGISTER
;
3521 i
.sib
.index
= NO_INDEX_REGISTER
;
3522 i
.types
[op
] = ((i
.prefix
[ADDR_PREFIX
] == 0)
3523 ? Disp32S
: Disp32
);
3525 else if ((flag_code
== CODE_16BIT
)
3526 ^ (i
.prefix
[ADDR_PREFIX
] != 0))
3528 i
.rm
.regmem
= NO_BASE_REGISTER_16
;
3529 i
.types
[op
] = Disp16
;
3533 i
.rm
.regmem
= NO_BASE_REGISTER
;
3534 i
.types
[op
] = Disp32
;
3537 else /* !i.base_reg && i.index_reg */
3539 i
.sib
.index
= i
.index_reg
->reg_num
;
3540 i
.sib
.base
= NO_BASE_REGISTER
;
3541 i
.sib
.scale
= i
.log2_scale_factor
;
3542 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
3543 i
.types
[op
] &= ~Disp
;
3544 if (flag_code
!= CODE_64BIT
)
3545 i
.types
[op
] |= Disp32
; /* Must be 32 bit */
3547 i
.types
[op
] |= Disp32S
;
3548 if ((i
.index_reg
->reg_flags
& RegRex
) != 0)
3552 /* RIP addressing for 64bit mode. */
3553 else if (i
.base_reg
->reg_type
== BaseIndex
)
3555 i
.rm
.regmem
= NO_BASE_REGISTER
;
3556 i
.types
[op
] &= ~ Disp
;
3557 i
.types
[op
] |= Disp32S
;
3558 i
.flags
[op
] |= Operand_PCrel
;
3559 if (! i
.disp_operands
)
3560 fake_zero_displacement
= 1;
3562 else if (i
.base_reg
->reg_type
& Reg16
)
3564 switch (i
.base_reg
->reg_num
)
3567 if (i
.index_reg
== 0)
3569 else /* (%bx,%si) -> 0, or (%bx,%di) -> 1 */
3570 i
.rm
.regmem
= i
.index_reg
->reg_num
- 6;
3574 if (i
.index_reg
== 0)
3577 if ((i
.types
[op
] & Disp
) == 0)
3579 /* fake (%bp) into 0(%bp) */
3580 i
.types
[op
] |= Disp8
;
3581 fake_zero_displacement
= 1;
3584 else /* (%bp,%si) -> 2, or (%bp,%di) -> 3 */
3585 i
.rm
.regmem
= i
.index_reg
->reg_num
- 6 + 2;
3587 default: /* (%si) -> 4 or (%di) -> 5 */
3588 i
.rm
.regmem
= i
.base_reg
->reg_num
- 6 + 4;
3590 i
.rm
.mode
= mode_from_disp_size (i
.types
[op
]);
3592 else /* i.base_reg and 32/64 bit mode */
3594 if (flag_code
== CODE_64BIT
3595 && (i
.types
[op
] & Disp
))
3596 i
.types
[op
] = ((i
.types
[op
] & Disp8
)
3597 | (i
.prefix
[ADDR_PREFIX
] == 0
3598 ? Disp32S
: Disp32
));
3600 i
.rm
.regmem
= i
.base_reg
->reg_num
;
3601 if ((i
.base_reg
->reg_flags
& RegRex
) != 0)
3603 i
.sib
.base
= i
.base_reg
->reg_num
;
3604 /* x86-64 ignores REX prefix bit here to avoid decoder
3606 if ((i
.base_reg
->reg_num
& 7) == EBP_REG_NUM
)
3609 if (i
.disp_operands
== 0)
3611 fake_zero_displacement
= 1;
3612 i
.types
[op
] |= Disp8
;
3615 else if (i
.base_reg
->reg_num
== ESP_REG_NUM
)
3619 i
.sib
.scale
= i
.log2_scale_factor
;
3620 if (i
.index_reg
== 0)
3622 /* <disp>(%esp) becomes two byte modrm with no index
3623 register. We've already stored the code for esp
3624 in i.rm.regmem ie. ESCAPE_TO_TWO_BYTE_ADDRESSING.
3625 Any base register besides %esp will not use the
3626 extra modrm byte. */
3627 i
.sib
.index
= NO_INDEX_REGISTER
;
3628 #if !SCALE1_WHEN_NO_INDEX
3629 /* Another case where we force the second modrm byte. */
3630 if (i
.log2_scale_factor
)
3631 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
3636 i
.sib
.index
= i
.index_reg
->reg_num
;
3637 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
3638 if ((i
.index_reg
->reg_flags
& RegRex
) != 0)
3643 && (i
.reloc
[op
] == BFD_RELOC_386_TLS_DESC_CALL
3644 || i
.reloc
[op
] == BFD_RELOC_X86_64_TLSDESC_CALL
))
3647 i
.rm
.mode
= mode_from_disp_size (i
.types
[op
]);
3650 if (fake_zero_displacement
)
3652 /* Fakes a zero displacement assuming that i.types[op]
3653 holds the correct displacement size. */
3656 assert (i
.op
[op
].disps
== 0);
3657 exp
= &disp_expressions
[i
.disp_operands
++];
3658 i
.op
[op
].disps
= exp
;
3659 exp
->X_op
= O_constant
;
3660 exp
->X_add_number
= 0;
3661 exp
->X_add_symbol
= (symbolS
*) 0;
3662 exp
->X_op_symbol
= (symbolS
*) 0;
3666 /* Fill in i.rm.reg or i.rm.regmem field with register operand
3667 (if any) based on i.tm.extension_opcode. Again, we must be
3668 careful to make sure that segment/control/debug/test/MMX
3669 registers are coded into the i.rm.reg field. */
3674 & (Reg
| RegMMX
| RegXMM
3676 | Control
| Debug
| Test
))
3679 & (Reg
| RegMMX
| RegXMM
3681 | Control
| Debug
| Test
))
3684 /* If there is an extension opcode to put here, the register
3685 number must be put into the regmem field. */
3686 if (i
.tm
.extension_opcode
!= None
)
3688 i
.rm
.regmem
= i
.op
[op
].regs
->reg_num
;
3689 if ((i
.op
[op
].regs
->reg_flags
& RegRex
) != 0)
3694 i
.rm
.reg
= i
.op
[op
].regs
->reg_num
;
3695 if ((i
.op
[op
].regs
->reg_flags
& RegRex
) != 0)
3699 /* Now, if no memory operand has set i.rm.mode = 0, 1, 2 we
3700 must set it to 3 to indicate this is a register operand
3701 in the regmem field. */
3702 if (!i
.mem_operands
)
3706 /* Fill in i.rm.reg field with extension opcode (if any). */
3707 if (i
.tm
.extension_opcode
!= None
)
3708 i
.rm
.reg
= i
.tm
.extension_opcode
;
3719 relax_substateT subtype
;
3724 if (flag_code
== CODE_16BIT
)
3728 if (i
.prefix
[DATA_PREFIX
] != 0)
3734 /* Pentium4 branch hints. */
3735 if (i
.prefix
[SEG_PREFIX
] == CS_PREFIX_OPCODE
/* not taken */
3736 || i
.prefix
[SEG_PREFIX
] == DS_PREFIX_OPCODE
/* taken */)
3741 if (i
.prefix
[REX_PREFIX
] != 0)
3747 if (i
.prefixes
!= 0 && !intel_syntax
)
3748 as_warn (_("skipping prefixes on this instruction"));
3750 /* It's always a symbol; End frag & setup for relax.
3751 Make sure there is enough room in this frag for the largest
3752 instruction we may generate in md_convert_frag. This is 2
3753 bytes for the opcode and room for the prefix and largest
3755 frag_grow (prefix
+ 2 + 4);
3756 /* Prefix and 1 opcode byte go in fr_fix. */
3757 p
= frag_more (prefix
+ 1);
3758 if (i
.prefix
[DATA_PREFIX
] != 0)
3759 *p
++ = DATA_PREFIX_OPCODE
;
3760 if (i
.prefix
[SEG_PREFIX
] == CS_PREFIX_OPCODE
3761 || i
.prefix
[SEG_PREFIX
] == DS_PREFIX_OPCODE
)
3762 *p
++ = i
.prefix
[SEG_PREFIX
];
3763 if (i
.prefix
[REX_PREFIX
] != 0)
3764 *p
++ = i
.prefix
[REX_PREFIX
];
3765 *p
= i
.tm
.base_opcode
;
3767 if ((unsigned char) *p
== JUMP_PC_RELATIVE
)
3768 subtype
= ENCODE_RELAX_STATE (UNCOND_JUMP
, SMALL
);
3769 else if ((cpu_arch_flags
& Cpu386
) != 0)
3770 subtype
= ENCODE_RELAX_STATE (COND_JUMP
, SMALL
);
3772 subtype
= ENCODE_RELAX_STATE (COND_JUMP86
, SMALL
);
3775 sym
= i
.op
[0].disps
->X_add_symbol
;
3776 off
= i
.op
[0].disps
->X_add_number
;
3778 if (i
.op
[0].disps
->X_op
!= O_constant
3779 && i
.op
[0].disps
->X_op
!= O_symbol
)
3781 /* Handle complex expressions. */
3782 sym
= make_expr_symbol (i
.op
[0].disps
);
3786 /* 1 possible extra opcode + 4 byte displacement go in var part.
3787 Pass reloc in fr_var. */
3788 frag_var (rs_machine_dependent
, 5, i
.reloc
[0], subtype
, sym
, off
, p
);
3798 if (i
.tm
.opcode_modifier
& JumpByte
)
3800 /* This is a loop or jecxz type instruction. */
3802 if (i
.prefix
[ADDR_PREFIX
] != 0)
3804 FRAG_APPEND_1_CHAR (ADDR_PREFIX_OPCODE
);
3807 /* Pentium4 branch hints. */
3808 if (i
.prefix
[SEG_PREFIX
] == CS_PREFIX_OPCODE
/* not taken */
3809 || i
.prefix
[SEG_PREFIX
] == DS_PREFIX_OPCODE
/* taken */)
3811 FRAG_APPEND_1_CHAR (i
.prefix
[SEG_PREFIX
]);
3820 if (flag_code
== CODE_16BIT
)
3823 if (i
.prefix
[DATA_PREFIX
] != 0)
3825 FRAG_APPEND_1_CHAR (DATA_PREFIX_OPCODE
);
3835 if (i
.prefix
[REX_PREFIX
] != 0)
3837 FRAG_APPEND_1_CHAR (i
.prefix
[REX_PREFIX
]);
3841 if (i
.prefixes
!= 0 && !intel_syntax
)
3842 as_warn (_("skipping prefixes on this instruction"));
3844 p
= frag_more (1 + size
);
3845 *p
++ = i
.tm
.base_opcode
;
3847 fixP
= fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
3848 i
.op
[0].disps
, 1, reloc (size
, 1, 1, i
.reloc
[0]));
3850 /* All jumps handled here are signed, but don't use a signed limit
3851 check for 32 and 16 bit jumps as we want to allow wrap around at
3852 4G and 64k respectively. */
3854 fixP
->fx_signed
= 1;
3858 output_interseg_jump ()
3866 if (flag_code
== CODE_16BIT
)
3870 if (i
.prefix
[DATA_PREFIX
] != 0)
3876 if (i
.prefix
[REX_PREFIX
] != 0)
3886 if (i
.prefixes
!= 0 && !intel_syntax
)
3887 as_warn (_("skipping prefixes on this instruction"));
3889 /* 1 opcode; 2 segment; offset */
3890 p
= frag_more (prefix
+ 1 + 2 + size
);
3892 if (i
.prefix
[DATA_PREFIX
] != 0)
3893 *p
++ = DATA_PREFIX_OPCODE
;
3895 if (i
.prefix
[REX_PREFIX
] != 0)
3896 *p
++ = i
.prefix
[REX_PREFIX
];
3898 *p
++ = i
.tm
.base_opcode
;
3899 if (i
.op
[1].imms
->X_op
== O_constant
)
3901 offsetT n
= i
.op
[1].imms
->X_add_number
;
3904 && !fits_in_unsigned_word (n
)
3905 && !fits_in_signed_word (n
))
3907 as_bad (_("16-bit jump out of range"));
3910 md_number_to_chars (p
, n
, size
);
3913 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
3914 i
.op
[1].imms
, 0, reloc (size
, 0, 0, i
.reloc
[1]));
3915 if (i
.op
[0].imms
->X_op
!= O_constant
)
3916 as_bad (_("can't handle non absolute segment in `%s'"),
3918 md_number_to_chars (p
+ size
, (valueT
) i
.op
[0].imms
->X_add_number
, 2);
3924 fragS
*insn_start_frag
;
3925 offsetT insn_start_off
;
3927 /* Tie dwarf2 debug info to the address at the start of the insn.
3928 We can't do this after the insn has been output as the current
3929 frag may have been closed off. eg. by frag_var. */
3930 dwarf2_emit_insn (0);
3932 insn_start_frag
= frag_now
;
3933 insn_start_off
= frag_now_fix ();
3936 if (i
.tm
.opcode_modifier
& Jump
)
3938 else if (i
.tm
.opcode_modifier
& (JumpByte
| JumpDword
))
3940 else if (i
.tm
.opcode_modifier
& JumpInterSegment
)
3941 output_interseg_jump ();
3944 /* Output normal instructions here. */
3947 unsigned int prefix
;
3949 /* All opcodes on i386 have either 1 or 2 bytes. Supplemental
3950 Streaming SIMD extensions 3 Instructions have 3 bytes. We may
3951 use one more higher byte to specify a prefix the instruction
3953 if ((i
.tm
.cpu_flags
& CpuSSSE3
) != 0)
3955 if (i
.tm
.base_opcode
& 0xff000000)
3957 prefix
= (i
.tm
.base_opcode
>> 24) & 0xff;
3961 else if ((i
.tm
.base_opcode
& 0xff0000) != 0)
3963 prefix
= (i
.tm
.base_opcode
>> 16) & 0xff;
3964 if ((i
.tm
.cpu_flags
& CpuPadLock
) != 0)
3967 if (prefix
!= REPE_PREFIX_OPCODE
3968 || i
.prefix
[LOCKREP_PREFIX
] != REPE_PREFIX_OPCODE
)
3969 add_prefix (prefix
);
3972 add_prefix (prefix
);
3975 /* The prefix bytes. */
3977 q
< i
.prefix
+ sizeof (i
.prefix
) / sizeof (i
.prefix
[0]);
3983 md_number_to_chars (p
, (valueT
) *q
, 1);
3987 /* Now the opcode; be careful about word order here! */
3988 if (fits_in_unsigned_byte (i
.tm
.base_opcode
))
3990 FRAG_APPEND_1_CHAR (i
.tm
.base_opcode
);
3994 if ((i
.tm
.cpu_flags
& CpuSSSE3
) != 0)
3997 *p
++ = (i
.tm
.base_opcode
>> 16) & 0xff;
4002 /* Put out high byte first: can't use md_number_to_chars! */
4003 *p
++ = (i
.tm
.base_opcode
>> 8) & 0xff;
4004 *p
= i
.tm
.base_opcode
& 0xff;
4007 /* Now the modrm byte and sib byte (if present). */
4008 if (i
.tm
.opcode_modifier
& Modrm
)
4011 md_number_to_chars (p
,
4012 (valueT
) (i
.rm
.regmem
<< 0
4016 /* If i.rm.regmem == ESP (4)
4017 && i.rm.mode != (Register mode)
4019 ==> need second modrm byte. */
4020 if (i
.rm
.regmem
== ESCAPE_TO_TWO_BYTE_ADDRESSING
4022 && !(i
.base_reg
&& (i
.base_reg
->reg_type
& Reg16
) != 0))
4025 md_number_to_chars (p
,
4026 (valueT
) (i
.sib
.base
<< 0
4028 | i
.sib
.scale
<< 6),
4033 if (i
.disp_operands
)
4034 output_disp (insn_start_frag
, insn_start_off
);
4037 output_imm (insn_start_frag
, insn_start_off
);
4043 pi ("" /*line*/, &i
);
4045 #endif /* DEBUG386 */
4049 output_disp (fragS
*insn_start_frag
, offsetT insn_start_off
)
4054 for (n
= 0; n
< i
.operands
; n
++)
4056 if (i
.types
[n
] & Disp
)
4058 if (i
.op
[n
].disps
->X_op
== O_constant
)
4064 if (i
.types
[n
] & (Disp8
| Disp16
| Disp64
))
4067 if (i
.types
[n
] & Disp8
)
4069 if (i
.types
[n
] & Disp64
)
4072 val
= offset_in_range (i
.op
[n
].disps
->X_add_number
,
4074 p
= frag_more (size
);
4075 md_number_to_chars (p
, val
, size
);
4079 enum bfd_reloc_code_real reloc_type
;
4082 int pcrel
= (i
.flags
[n
] & Operand_PCrel
) != 0;
4084 /* The PC relative address is computed relative
4085 to the instruction boundary, so in case immediate
4086 fields follows, we need to adjust the value. */
4087 if (pcrel
&& i
.imm_operands
)
4092 for (n1
= 0; n1
< i
.operands
; n1
++)
4093 if (i
.types
[n1
] & Imm
)
4095 if (i
.types
[n1
] & (Imm8
| Imm8S
| Imm16
| Imm64
))
4098 if (i
.types
[n1
] & (Imm8
| Imm8S
))
4100 if (i
.types
[n1
] & Imm64
)
4105 /* We should find the immediate. */
4106 if (n1
== i
.operands
)
4108 i
.op
[n
].disps
->X_add_number
-= imm_size
;
4111 if (i
.types
[n
] & Disp32S
)
4114 if (i
.types
[n
] & (Disp16
| Disp64
))
4117 if (i
.types
[n
] & Disp64
)
4121 p
= frag_more (size
);
4122 reloc_type
= reloc (size
, pcrel
, sign
, i
.reloc
[n
]);
4124 && GOT_symbol
== i
.op
[n
].disps
->X_add_symbol
4125 && (((reloc_type
== BFD_RELOC_32
4126 || reloc_type
== BFD_RELOC_X86_64_32S
4127 || (reloc_type
== BFD_RELOC_64
4129 && (i
.op
[n
].disps
->X_op
== O_symbol
4130 || (i
.op
[n
].disps
->X_op
== O_add
4131 && ((symbol_get_value_expression
4132 (i
.op
[n
].disps
->X_op_symbol
)->X_op
)
4134 || reloc_type
== BFD_RELOC_32_PCREL
))
4138 if (insn_start_frag
== frag_now
)
4139 add
= (p
- frag_now
->fr_literal
) - insn_start_off
;
4144 add
= insn_start_frag
->fr_fix
- insn_start_off
;
4145 for (fr
= insn_start_frag
->fr_next
;
4146 fr
&& fr
!= frag_now
; fr
= fr
->fr_next
)
4148 add
+= p
- frag_now
->fr_literal
;
4153 reloc_type
= BFD_RELOC_386_GOTPC
;
4154 i
.op
[n
].imms
->X_add_number
+= add
;
4156 else if (reloc_type
== BFD_RELOC_64
)
4157 reloc_type
= BFD_RELOC_X86_64_GOTPC64
;
4159 /* Don't do the adjustment for x86-64, as there
4160 the pcrel addressing is relative to the _next_
4161 insn, and that is taken care of in other code. */
4162 reloc_type
= BFD_RELOC_X86_64_GOTPC32
;
4164 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
4165 i
.op
[n
].disps
, pcrel
, reloc_type
);
4172 output_imm (fragS
*insn_start_frag
, offsetT insn_start_off
)
4177 for (n
= 0; n
< i
.operands
; n
++)
4179 if (i
.types
[n
] & Imm
)
4181 if (i
.op
[n
].imms
->X_op
== O_constant
)
4187 if (i
.types
[n
] & (Imm8
| Imm8S
| Imm16
| Imm64
))
4190 if (i
.types
[n
] & (Imm8
| Imm8S
))
4192 else if (i
.types
[n
] & Imm64
)
4195 val
= offset_in_range (i
.op
[n
].imms
->X_add_number
,
4197 p
= frag_more (size
);
4198 md_number_to_chars (p
, val
, size
);
4202 /* Not absolute_section.
4203 Need a 32-bit fixup (don't support 8bit
4204 non-absolute imms). Try to support other
4206 enum bfd_reloc_code_real reloc_type
;
4210 if ((i
.types
[n
] & (Imm32S
))
4211 && (i
.suffix
== QWORD_MNEM_SUFFIX
4212 || (!i
.suffix
&& (i
.tm
.opcode_modifier
& No_lSuf
))))
4214 if (i
.types
[n
] & (Imm8
| Imm8S
| Imm16
| Imm64
))
4217 if (i
.types
[n
] & (Imm8
| Imm8S
))
4219 if (i
.types
[n
] & Imm64
)
4223 p
= frag_more (size
);
4224 reloc_type
= reloc (size
, 0, sign
, i
.reloc
[n
]);
4226 /* This is tough to explain. We end up with this one if we
4227 * have operands that look like
4228 * "_GLOBAL_OFFSET_TABLE_+[.-.L284]". The goal here is to
4229 * obtain the absolute address of the GOT, and it is strongly
4230 * preferable from a performance point of view to avoid using
4231 * a runtime relocation for this. The actual sequence of
4232 * instructions often look something like:
4237 * addl $_GLOBAL_OFFSET_TABLE_+[.-.L66],%ebx
4239 * The call and pop essentially return the absolute address
4240 * of the label .L66 and store it in %ebx. The linker itself
4241 * will ultimately change the first operand of the addl so
4242 * that %ebx points to the GOT, but to keep things simple, the
4243 * .o file must have this operand set so that it generates not
4244 * the absolute address of .L66, but the absolute address of
4245 * itself. This allows the linker itself simply treat a GOTPC
4246 * relocation as asking for a pcrel offset to the GOT to be
4247 * added in, and the addend of the relocation is stored in the
4248 * operand field for the instruction itself.
4250 * Our job here is to fix the operand so that it would add
4251 * the correct offset so that %ebx would point to itself. The
4252 * thing that is tricky is that .-.L66 will point to the
4253 * beginning of the instruction, so we need to further modify
4254 * the operand so that it will point to itself. There are
4255 * other cases where you have something like:
4257 * .long $_GLOBAL_OFFSET_TABLE_+[.-.L66]
4259 * and here no correction would be required. Internally in
4260 * the assembler we treat operands of this form as not being
4261 * pcrel since the '.' is explicitly mentioned, and I wonder
4262 * whether it would simplify matters to do it this way. Who
4263 * knows. In earlier versions of the PIC patches, the
4264 * pcrel_adjust field was used to store the correction, but
4265 * since the expression is not pcrel, I felt it would be
4266 * confusing to do it this way. */
4268 if ((reloc_type
== BFD_RELOC_32
4269 || reloc_type
== BFD_RELOC_X86_64_32S
4270 || reloc_type
== BFD_RELOC_64
)
4272 && GOT_symbol
== i
.op
[n
].imms
->X_add_symbol
4273 && (i
.op
[n
].imms
->X_op
== O_symbol
4274 || (i
.op
[n
].imms
->X_op
== O_add
4275 && ((symbol_get_value_expression
4276 (i
.op
[n
].imms
->X_op_symbol
)->X_op
)
4281 if (insn_start_frag
== frag_now
)
4282 add
= (p
- frag_now
->fr_literal
) - insn_start_off
;
4287 add
= insn_start_frag
->fr_fix
- insn_start_off
;
4288 for (fr
= insn_start_frag
->fr_next
;
4289 fr
&& fr
!= frag_now
; fr
= fr
->fr_next
)
4291 add
+= p
- frag_now
->fr_literal
;
4295 reloc_type
= BFD_RELOC_386_GOTPC
;
4297 reloc_type
= BFD_RELOC_X86_64_GOTPC32
;
4299 reloc_type
= BFD_RELOC_X86_64_GOTPC64
;
4300 i
.op
[n
].imms
->X_add_number
+= add
;
4302 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
4303 i
.op
[n
].imms
, 0, reloc_type
);
4309 /* x86_cons_fix_new is called via the expression parsing code when a
4310 reloc is needed. We use this hook to get the correct .got reloc. */
4311 static enum bfd_reloc_code_real got_reloc
= NO_RELOC
;
4312 static int cons_sign
= -1;
4315 x86_cons_fix_new (fragS
*frag
,
4320 enum bfd_reloc_code_real r
= reloc (len
, 0, cons_sign
, got_reloc
);
4322 got_reloc
= NO_RELOC
;
4325 if (exp
->X_op
== O_secrel
)
4327 exp
->X_op
= O_symbol
;
4328 r
= BFD_RELOC_32_SECREL
;
4332 fix_new_exp (frag
, off
, len
, exp
, 0, r
);
4335 #if (!defined (OBJ_ELF) && !defined (OBJ_MAYBE_ELF)) || defined (LEX_AT)
4336 # define lex_got(reloc, adjust, types) NULL
4338 /* Parse operands of the form
4339 <symbol>@GOTOFF+<nnn>
4340 and similar .plt or .got references.
4342 If we find one, set up the correct relocation in RELOC and copy the
4343 input string, minus the `@GOTOFF' into a malloc'd buffer for
4344 parsing by the calling routine. Return this buffer, and if ADJUST
4345 is non-null set it to the length of the string we removed from the
4346 input line. Otherwise return NULL. */
4348 lex_got (enum bfd_reloc_code_real
*reloc
,
4350 unsigned int *types
)
4352 /* Some of the relocations depend on the size of what field is to
4353 be relocated. But in our callers i386_immediate and i386_displacement
4354 we don't yet know the operand size (this will be set by insn
4355 matching). Hence we record the word32 relocation here,
4356 and adjust the reloc according to the real size in reloc(). */
4357 static const struct {
4359 const enum bfd_reloc_code_real rel
[2];
4360 const unsigned int types64
;
4362 { "PLTOFF", { 0, BFD_RELOC_X86_64_PLTOFF64
}, Imm64
},
4363 { "PLT", { BFD_RELOC_386_PLT32
, BFD_RELOC_X86_64_PLT32
}, Imm32
|Imm32S
|Disp32
},
4364 { "GOTPLT", { 0, BFD_RELOC_X86_64_GOTPLT64
}, Imm64
|Disp64
},
4365 { "GOTOFF", { BFD_RELOC_386_GOTOFF
, BFD_RELOC_X86_64_GOTOFF64
}, Imm64
|Disp64
},
4366 { "GOTPCREL", { 0, BFD_RELOC_X86_64_GOTPCREL
}, Imm32
|Imm32S
|Disp32
},
4367 { "TLSGD", { BFD_RELOC_386_TLS_GD
, BFD_RELOC_X86_64_TLSGD
}, Imm32
|Imm32S
|Disp32
},
4368 { "TLSLDM", { BFD_RELOC_386_TLS_LDM
, 0 }, 0 },
4369 { "TLSLD", { 0, BFD_RELOC_X86_64_TLSLD
}, Imm32
|Imm32S
|Disp32
},
4370 { "GOTTPOFF", { BFD_RELOC_386_TLS_IE_32
, BFD_RELOC_X86_64_GOTTPOFF
}, Imm32
|Imm32S
|Disp32
},
4371 { "TPOFF", { BFD_RELOC_386_TLS_LE_32
, BFD_RELOC_X86_64_TPOFF32
}, Imm32
|Imm32S
|Imm64
|Disp32
|Disp64
},
4372 { "NTPOFF", { BFD_RELOC_386_TLS_LE
, 0 }, 0 },
4373 { "DTPOFF", { BFD_RELOC_386_TLS_LDO_32
, BFD_RELOC_X86_64_DTPOFF32
}, Imm32
|Imm32S
|Imm64
|Disp32
|Disp64
},
4374 { "GOTNTPOFF",{ BFD_RELOC_386_TLS_GOTIE
, 0 }, 0 },
4375 { "INDNTPOFF",{ BFD_RELOC_386_TLS_IE
, 0 }, 0 },
4376 { "GOT", { BFD_RELOC_386_GOT32
, BFD_RELOC_X86_64_GOT32
}, Imm32
|Imm32S
|Disp32
|Imm64
},
4377 { "TLSDESC", { BFD_RELOC_386_TLS_GOTDESC
, BFD_RELOC_X86_64_GOTPC32_TLSDESC
}, Imm32
|Imm32S
|Disp32
},
4378 { "TLSCALL", { BFD_RELOC_386_TLS_DESC_CALL
, BFD_RELOC_X86_64_TLSDESC_CALL
}, Imm32
|Imm32S
|Disp32
}
4386 for (cp
= input_line_pointer
; *cp
!= '@'; cp
++)
4387 if (is_end_of_line
[(unsigned char) *cp
])
4390 for (j
= 0; j
< sizeof (gotrel
) / sizeof (gotrel
[0]); j
++)
4394 len
= strlen (gotrel
[j
].str
);
4395 if (strncasecmp (cp
+ 1, gotrel
[j
].str
, len
) == 0)
4397 if (gotrel
[j
].rel
[object_64bit
] != 0)
4400 char *tmpbuf
, *past_reloc
;
4402 *reloc
= gotrel
[j
].rel
[object_64bit
];
4408 if (flag_code
!= CODE_64BIT
)
4409 *types
= Imm32
|Disp32
;
4411 *types
= gotrel
[j
].types64
;
4414 if (GOT_symbol
== NULL
)
4415 GOT_symbol
= symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME
);
4417 /* Replace the relocation token with ' ', so that
4418 errors like foo@GOTOFF1 will be detected. */
4420 /* The length of the first part of our input line. */
4421 first
= cp
- input_line_pointer
;
4423 /* The second part goes from after the reloc token until
4424 (and including) an end_of_line char. Don't use strlen
4425 here as the end_of_line char may not be a NUL. */
4426 past_reloc
= cp
+ 1 + len
;
4427 for (cp
= past_reloc
; !is_end_of_line
[(unsigned char) *cp
++]; )
4429 second
= cp
- past_reloc
;
4431 /* Allocate and copy string. The trailing NUL shouldn't
4432 be necessary, but be safe. */
4433 tmpbuf
= xmalloc (first
+ second
+ 2);
4434 memcpy (tmpbuf
, input_line_pointer
, first
);
4435 tmpbuf
[first
] = ' ';
4436 memcpy (tmpbuf
+ first
+ 1, past_reloc
, second
);
4437 tmpbuf
[first
+ second
+ 1] = '\0';
4441 as_bad (_("@%s reloc is not supported with %d-bit output format"),
4442 gotrel
[j
].str
, 1 << (5 + object_64bit
));
4447 /* Might be a symbol version string. Don't as_bad here. */
4452 x86_cons (exp
, size
)
4456 if (size
== 4 || (object_64bit
&& size
== 8))
4458 /* Handle @GOTOFF and the like in an expression. */
4460 char *gotfree_input_line
;
4463 save
= input_line_pointer
;
4464 gotfree_input_line
= lex_got (&got_reloc
, &adjust
, NULL
);
4465 if (gotfree_input_line
)
4466 input_line_pointer
= gotfree_input_line
;
4470 if (gotfree_input_line
)
4472 /* expression () has merrily parsed up to the end of line,
4473 or a comma - in the wrong buffer. Transfer how far
4474 input_line_pointer has moved to the right buffer. */
4475 input_line_pointer
= (save
4476 + (input_line_pointer
- gotfree_input_line
)
4478 free (gotfree_input_line
);
4486 static void signed_cons (int size
)
4488 if (flag_code
== CODE_64BIT
)
4496 pe_directive_secrel (dummy
)
4497 int dummy ATTRIBUTE_UNUSED
;
4504 if (exp
.X_op
== O_symbol
)
4505 exp
.X_op
= O_secrel
;
4507 emit_expr (&exp
, 4);
4509 while (*input_line_pointer
++ == ',');
4511 input_line_pointer
--;
4512 demand_empty_rest_of_line ();
4517 i386_immediate (char *imm_start
)
4519 char *save_input_line_pointer
;
4520 char *gotfree_input_line
;
4523 unsigned int types
= ~0U;
4525 if (i
.imm_operands
== MAX_IMMEDIATE_OPERANDS
)
4527 as_bad (_("at most %d immediate operands are allowed"),
4528 MAX_IMMEDIATE_OPERANDS
);
4532 exp
= &im_expressions
[i
.imm_operands
++];
4533 i
.op
[this_operand
].imms
= exp
;
4535 if (is_space_char (*imm_start
))
4538 save_input_line_pointer
= input_line_pointer
;
4539 input_line_pointer
= imm_start
;
4541 gotfree_input_line
= lex_got (&i
.reloc
[this_operand
], NULL
, &types
);
4542 if (gotfree_input_line
)
4543 input_line_pointer
= gotfree_input_line
;
4545 exp_seg
= expression (exp
);
4548 if (*input_line_pointer
)
4549 as_bad (_("junk `%s' after expression"), input_line_pointer
);
4551 input_line_pointer
= save_input_line_pointer
;
4552 if (gotfree_input_line
)
4553 free (gotfree_input_line
);
4555 if (exp
->X_op
== O_absent
|| exp
->X_op
== O_big
)
4557 /* Missing or bad expr becomes absolute 0. */
4558 as_bad (_("missing or invalid immediate expression `%s' taken as 0"),
4560 exp
->X_op
= O_constant
;
4561 exp
->X_add_number
= 0;
4562 exp
->X_add_symbol
= (symbolS
*) 0;
4563 exp
->X_op_symbol
= (symbolS
*) 0;
4565 else if (exp
->X_op
== O_constant
)
4567 /* Size it properly later. */
4568 i
.types
[this_operand
] |= Imm64
;
4569 /* If BFD64, sign extend val. */
4570 if (!use_rela_relocations
)
4571 if ((exp
->X_add_number
& ~(((addressT
) 2 << 31) - 1)) == 0)
4572 exp
->X_add_number
= (exp
->X_add_number
^ ((addressT
) 1 << 31)) - ((addressT
) 1 << 31);
4574 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
4575 else if (OUTPUT_FLAVOR
== bfd_target_aout_flavour
4576 && exp_seg
!= absolute_section
4577 && exp_seg
!= text_section
4578 && exp_seg
!= data_section
4579 && exp_seg
!= bss_section
4580 && exp_seg
!= undefined_section
4581 && !bfd_is_com_section (exp_seg
))
4583 as_bad (_("unimplemented segment %s in operand"), exp_seg
->name
);
4587 else if (!intel_syntax
&& exp
->X_op
== O_register
)
4589 as_bad (_("illegal immediate register operand %s"), imm_start
);
4594 /* This is an address. The size of the address will be
4595 determined later, depending on destination register,
4596 suffix, or the default for the section. */
4597 i
.types
[this_operand
] |= Imm8
| Imm16
| Imm32
| Imm32S
| Imm64
;
4598 i
.types
[this_operand
] &= types
;
4604 static char *i386_scale
PARAMS ((char *));
4611 char *save
= input_line_pointer
;
4613 input_line_pointer
= scale
;
4614 val
= get_absolute_expression ();
4619 i
.log2_scale_factor
= 0;
4622 i
.log2_scale_factor
= 1;
4625 i
.log2_scale_factor
= 2;
4628 i
.log2_scale_factor
= 3;
4632 char sep
= *input_line_pointer
;
4634 *input_line_pointer
= '\0';
4635 as_bad (_("expecting scale factor of 1, 2, 4, or 8: got `%s'"),
4637 *input_line_pointer
= sep
;
4638 input_line_pointer
= save
;
4642 if (i
.log2_scale_factor
!= 0 && i
.index_reg
== 0)
4644 as_warn (_("scale factor of %d without an index register"),
4645 1 << i
.log2_scale_factor
);
4646 #if SCALE1_WHEN_NO_INDEX
4647 i
.log2_scale_factor
= 0;
4650 scale
= input_line_pointer
;
4651 input_line_pointer
= save
;
4655 static int i386_displacement
PARAMS ((char *, char *));
4658 i386_displacement (disp_start
, disp_end
)
4664 char *save_input_line_pointer
;
4665 char *gotfree_input_line
;
4666 int bigdisp
, override
;
4667 unsigned int types
= Disp
;
4669 if (i
.disp_operands
== MAX_MEMORY_OPERANDS
)
4671 as_bad (_("at most %d displacement operands are allowed"),
4672 MAX_MEMORY_OPERANDS
);
4676 if ((i
.types
[this_operand
] & JumpAbsolute
)
4677 || !(current_templates
->start
->opcode_modifier
& (Jump
| JumpDword
)))
4680 override
= (i
.prefix
[ADDR_PREFIX
] != 0);
4684 /* For PC-relative branches, the width of the displacement
4685 is dependent upon data size, not address size. */
4687 override
= (i
.prefix
[DATA_PREFIX
] != 0);
4689 if (flag_code
== CODE_64BIT
)
4692 bigdisp
= ((override
|| i
.suffix
== WORD_MNEM_SUFFIX
)
4694 : Disp32S
| Disp32
);
4696 bigdisp
= Disp64
| Disp32S
| Disp32
;
4703 override
= (i
.suffix
== (flag_code
!= CODE_16BIT
4705 : LONG_MNEM_SUFFIX
));
4708 if ((flag_code
== CODE_16BIT
) ^ override
)
4711 i
.types
[this_operand
] |= bigdisp
;
4713 exp
= &disp_expressions
[i
.disp_operands
];
4714 i
.op
[this_operand
].disps
= exp
;
4716 save_input_line_pointer
= input_line_pointer
;
4717 input_line_pointer
= disp_start
;
4718 END_STRING_AND_SAVE (disp_end
);
4720 #ifndef GCC_ASM_O_HACK
4721 #define GCC_ASM_O_HACK 0
4724 END_STRING_AND_SAVE (disp_end
+ 1);
4725 if ((i
.types
[this_operand
] & BaseIndex
) != 0
4726 && displacement_string_end
[-1] == '+')
4728 /* This hack is to avoid a warning when using the "o"
4729 constraint within gcc asm statements.
4732 #define _set_tssldt_desc(n,addr,limit,type) \
4733 __asm__ __volatile__ ( \
4735 "movw %w1,2+%0\n\t" \
4737 "movb %b1,4+%0\n\t" \
4738 "movb %4,5+%0\n\t" \
4739 "movb $0,6+%0\n\t" \
4740 "movb %h1,7+%0\n\t" \
4742 : "=o"(*(n)) : "q" (addr), "ri"(limit), "i"(type))
4744 This works great except that the output assembler ends
4745 up looking a bit weird if it turns out that there is
4746 no offset. You end up producing code that looks like:
4759 So here we provide the missing zero. */
4761 *displacement_string_end
= '0';
4764 gotfree_input_line
= lex_got (&i
.reloc
[this_operand
], NULL
, &types
);
4765 if (gotfree_input_line
)
4766 input_line_pointer
= gotfree_input_line
;
4768 exp_seg
= expression (exp
);
4771 if (*input_line_pointer
)
4772 as_bad (_("junk `%s' after expression"), input_line_pointer
);
4774 RESTORE_END_STRING (disp_end
+ 1);
4776 RESTORE_END_STRING (disp_end
);
4777 input_line_pointer
= save_input_line_pointer
;
4778 if (gotfree_input_line
)
4779 free (gotfree_input_line
);
4781 /* We do this to make sure that the section symbol is in
4782 the symbol table. We will ultimately change the relocation
4783 to be relative to the beginning of the section. */
4784 if (i
.reloc
[this_operand
] == BFD_RELOC_386_GOTOFF
4785 || i
.reloc
[this_operand
] == BFD_RELOC_X86_64_GOTPCREL
4786 || i
.reloc
[this_operand
] == BFD_RELOC_X86_64_GOTOFF64
)
4788 if (exp
->X_op
!= O_symbol
)
4790 as_bad (_("bad expression used with @%s"),
4791 (i
.reloc
[this_operand
] == BFD_RELOC_X86_64_GOTPCREL
4797 if (S_IS_LOCAL (exp
->X_add_symbol
)
4798 && S_GET_SEGMENT (exp
->X_add_symbol
) != undefined_section
)
4799 section_symbol (S_GET_SEGMENT (exp
->X_add_symbol
));
4800 exp
->X_op
= O_subtract
;
4801 exp
->X_op_symbol
= GOT_symbol
;
4802 if (i
.reloc
[this_operand
] == BFD_RELOC_X86_64_GOTPCREL
)
4803 i
.reloc
[this_operand
] = BFD_RELOC_32_PCREL
;
4804 else if (i
.reloc
[this_operand
] == BFD_RELOC_X86_64_GOTOFF64
)
4805 i
.reloc
[this_operand
] = BFD_RELOC_64
;
4807 i
.reloc
[this_operand
] = BFD_RELOC_32
;
4810 if (exp
->X_op
== O_absent
|| exp
->X_op
== O_big
)
4812 /* Missing or bad expr becomes absolute 0. */
4813 as_bad (_("missing or invalid displacement expression `%s' taken as 0"),
4815 exp
->X_op
= O_constant
;
4816 exp
->X_add_number
= 0;
4817 exp
->X_add_symbol
= (symbolS
*) 0;
4818 exp
->X_op_symbol
= (symbolS
*) 0;
4821 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
4822 if (exp
->X_op
!= O_constant
4823 && OUTPUT_FLAVOR
== bfd_target_aout_flavour
4824 && exp_seg
!= absolute_section
4825 && exp_seg
!= text_section
4826 && exp_seg
!= data_section
4827 && exp_seg
!= bss_section
4828 && exp_seg
!= undefined_section
4829 && !bfd_is_com_section (exp_seg
))
4831 as_bad (_("unimplemented segment %s in operand"), exp_seg
->name
);
4836 if (!(i
.types
[this_operand
] & ~Disp
))
4837 i
.types
[this_operand
] &= types
;
4842 static int i386_index_check
PARAMS ((const char *));
4844 /* Make sure the memory operand we've been dealt is valid.
4845 Return 1 on success, 0 on a failure. */
4848 i386_index_check (operand_string
)
4849 const char *operand_string
;
4852 #if INFER_ADDR_PREFIX
4858 if ((current_templates
->start
->cpu_flags
& CpuSVME
)
4859 && current_templates
->end
[-1].operand_types
[0] == AnyMem
)
4861 /* Memory operands of SVME insns are special in that they only allow
4862 rAX as their memory address and ignore any segment override. */
4865 /* SKINIT is even more restrictive: it always requires EAX. */
4866 if (strcmp (current_templates
->start
->name
, "skinit") == 0)
4868 else if (flag_code
== CODE_64BIT
)
4869 RegXX
= i
.prefix
[ADDR_PREFIX
] == 0 ? Reg64
: Reg32
;
4871 RegXX
= ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[ADDR_PREFIX
] != 0)
4875 || !(i
.base_reg
->reg_type
& Acc
)
4876 || !(i
.base_reg
->reg_type
& RegXX
)
4878 || (i
.types
[0] & Disp
))
4881 else if (flag_code
== CODE_64BIT
)
4883 unsigned RegXX
= (i
.prefix
[ADDR_PREFIX
] == 0 ? Reg64
: Reg32
);
4886 && ((i
.base_reg
->reg_type
& RegXX
) == 0)
4887 && (i
.base_reg
->reg_type
!= BaseIndex
4890 && ((i
.index_reg
->reg_type
& (RegXX
| BaseIndex
))
4891 != (RegXX
| BaseIndex
))))
4896 if ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[ADDR_PREFIX
] != 0))
4900 && ((i
.base_reg
->reg_type
& (Reg16
| BaseIndex
| RegRex
))
4901 != (Reg16
| BaseIndex
)))
4903 && (((i
.index_reg
->reg_type
& (Reg16
| BaseIndex
))
4904 != (Reg16
| BaseIndex
))
4906 && i
.base_reg
->reg_num
< 6
4907 && i
.index_reg
->reg_num
>= 6
4908 && i
.log2_scale_factor
== 0))))
4915 && (i
.base_reg
->reg_type
& (Reg32
| RegRex
)) != Reg32
)
4917 && ((i
.index_reg
->reg_type
& (Reg32
| BaseIndex
| RegRex
))
4918 != (Reg32
| BaseIndex
))))
4924 #if INFER_ADDR_PREFIX
4925 if (i
.prefix
[ADDR_PREFIX
] == 0)
4927 i
.prefix
[ADDR_PREFIX
] = ADDR_PREFIX_OPCODE
;
4929 /* Change the size of any displacement too. At most one of
4930 Disp16 or Disp32 is set.
4931 FIXME. There doesn't seem to be any real need for separate
4932 Disp16 and Disp32 flags. The same goes for Imm16 and Imm32.
4933 Removing them would probably clean up the code quite a lot. */
4934 if (flag_code
!= CODE_64BIT
&& (i
.types
[this_operand
] & (Disp16
| Disp32
)))
4935 i
.types
[this_operand
] ^= (Disp16
| Disp32
);
4940 as_bad (_("`%s' is not a valid base/index expression"),
4944 as_bad (_("`%s' is not a valid %s bit base/index expression"),
4946 flag_code_names
[flag_code
]);
4951 /* Parse OPERAND_STRING into the i386_insn structure I. Returns non-zero
4955 i386_operand (operand_string
)
4956 char *operand_string
;
4960 char *op_string
= operand_string
;
4962 if (is_space_char (*op_string
))
4965 /* We check for an absolute prefix (differentiating,
4966 for example, 'jmp pc_relative_label' from 'jmp *absolute_label'. */
4967 if (*op_string
== ABSOLUTE_PREFIX
)
4970 if (is_space_char (*op_string
))
4972 i
.types
[this_operand
] |= JumpAbsolute
;
4975 /* Check if operand is a register. */
4976 if ((r
= parse_register (op_string
, &end_op
)) != NULL
)
4978 /* Check for a segment override by searching for ':' after a
4979 segment register. */
4981 if (is_space_char (*op_string
))
4983 if (*op_string
== ':' && (r
->reg_type
& (SReg2
| SReg3
)))
4988 i
.seg
[i
.mem_operands
] = &es
;
4991 i
.seg
[i
.mem_operands
] = &cs
;
4994 i
.seg
[i
.mem_operands
] = &ss
;
4997 i
.seg
[i
.mem_operands
] = &ds
;
5000 i
.seg
[i
.mem_operands
] = &fs
;
5003 i
.seg
[i
.mem_operands
] = &gs
;
5007 /* Skip the ':' and whitespace. */
5009 if (is_space_char (*op_string
))
5012 if (!is_digit_char (*op_string
)
5013 && !is_identifier_char (*op_string
)
5014 && *op_string
!= '('
5015 && *op_string
!= ABSOLUTE_PREFIX
)
5017 as_bad (_("bad memory operand `%s'"), op_string
);
5020 /* Handle case of %es:*foo. */
5021 if (*op_string
== ABSOLUTE_PREFIX
)
5024 if (is_space_char (*op_string
))
5026 i
.types
[this_operand
] |= JumpAbsolute
;
5028 goto do_memory_reference
;
5032 as_bad (_("junk `%s' after register"), op_string
);
5035 i
.types
[this_operand
] |= r
->reg_type
& ~BaseIndex
;
5036 i
.op
[this_operand
].regs
= r
;
5039 else if (*op_string
== REGISTER_PREFIX
)
5041 as_bad (_("bad register name `%s'"), op_string
);
5044 else if (*op_string
== IMMEDIATE_PREFIX
)
5047 if (i
.types
[this_operand
] & JumpAbsolute
)
5049 as_bad (_("immediate operand illegal with absolute jump"));
5052 if (!i386_immediate (op_string
))
5055 else if (is_digit_char (*op_string
)
5056 || is_identifier_char (*op_string
)
5057 || *op_string
== '(')
5059 /* This is a memory reference of some sort. */
5062 /* Start and end of displacement string expression (if found). */
5063 char *displacement_string_start
;
5064 char *displacement_string_end
;
5066 do_memory_reference
:
5067 if ((i
.mem_operands
== 1
5068 && (current_templates
->start
->opcode_modifier
& IsString
) == 0)
5069 || i
.mem_operands
== 2)
5071 as_bad (_("too many memory references for `%s'"),
5072 current_templates
->start
->name
);
5076 /* Check for base index form. We detect the base index form by
5077 looking for an ')' at the end of the operand, searching
5078 for the '(' matching it, and finding a REGISTER_PREFIX or ','
5080 base_string
= op_string
+ strlen (op_string
);
5083 if (is_space_char (*base_string
))
5086 /* If we only have a displacement, set-up for it to be parsed later. */
5087 displacement_string_start
= op_string
;
5088 displacement_string_end
= base_string
+ 1;
5090 if (*base_string
== ')')
5093 unsigned int parens_balanced
= 1;
5094 /* We've already checked that the number of left & right ()'s are
5095 equal, so this loop will not be infinite. */
5099 if (*base_string
== ')')
5101 if (*base_string
== '(')
5104 while (parens_balanced
);
5106 temp_string
= base_string
;
5108 /* Skip past '(' and whitespace. */
5110 if (is_space_char (*base_string
))
5113 if (*base_string
== ','
5114 || ((i
.base_reg
= parse_register (base_string
, &end_op
)) != NULL
))
5116 displacement_string_end
= temp_string
;
5118 i
.types
[this_operand
] |= BaseIndex
;
5122 base_string
= end_op
;
5123 if (is_space_char (*base_string
))
5127 /* There may be an index reg or scale factor here. */
5128 if (*base_string
== ',')
5131 if (is_space_char (*base_string
))
5134 if ((i
.index_reg
= parse_register (base_string
, &end_op
)) != NULL
)
5136 base_string
= end_op
;
5137 if (is_space_char (*base_string
))
5139 if (*base_string
== ',')
5142 if (is_space_char (*base_string
))
5145 else if (*base_string
!= ')')
5147 as_bad (_("expecting `,' or `)' after index register in `%s'"),
5152 else if (*base_string
== REGISTER_PREFIX
)
5154 as_bad (_("bad register name `%s'"), base_string
);
5158 /* Check for scale factor. */
5159 if (*base_string
!= ')')
5161 char *end_scale
= i386_scale (base_string
);
5166 base_string
= end_scale
;
5167 if (is_space_char (*base_string
))
5169 if (*base_string
!= ')')
5171 as_bad (_("expecting `)' after scale factor in `%s'"),
5176 else if (!i
.index_reg
)
5178 as_bad (_("expecting index register or scale factor after `,'; got '%c'"),
5183 else if (*base_string
!= ')')
5185 as_bad (_("expecting `,' or `)' after base register in `%s'"),
5190 else if (*base_string
== REGISTER_PREFIX
)
5192 as_bad (_("bad register name `%s'"), base_string
);
5197 /* If there's an expression beginning the operand, parse it,
5198 assuming displacement_string_start and
5199 displacement_string_end are meaningful. */
5200 if (displacement_string_start
!= displacement_string_end
)
5202 if (!i386_displacement (displacement_string_start
,
5203 displacement_string_end
))
5207 /* Special case for (%dx) while doing input/output op. */
5209 && i
.base_reg
->reg_type
== (Reg16
| InOutPortReg
)
5211 && i
.log2_scale_factor
== 0
5212 && i
.seg
[i
.mem_operands
] == 0
5213 && (i
.types
[this_operand
] & Disp
) == 0)
5215 i
.types
[this_operand
] = InOutPortReg
;
5219 if (i386_index_check (operand_string
) == 0)
5225 /* It's not a memory operand; argh! */
5226 as_bad (_("invalid char %s beginning operand %d `%s'"),
5227 output_invalid (*op_string
),
5232 return 1; /* Normal return. */
5235 /* md_estimate_size_before_relax()
5237 Called just before relax() for rs_machine_dependent frags. The x86
5238 assembler uses these frags to handle variable size jump
5241 Any symbol that is now undefined will not become defined.
5242 Return the correct fr_subtype in the frag.
5243 Return the initial "guess for variable size of frag" to caller.
5244 The guess is actually the growth beyond the fixed part. Whatever
5245 we do to grow the fixed or variable part contributes to our
5249 md_estimate_size_before_relax (fragP
, segment
)
5253 /* We've already got fragP->fr_subtype right; all we have to do is
5254 check for un-relaxable symbols. On an ELF system, we can't relax
5255 an externally visible symbol, because it may be overridden by a
5257 if (S_GET_SEGMENT (fragP
->fr_symbol
) != segment
5258 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5260 && (S_IS_EXTERNAL (fragP
->fr_symbol
)
5261 || S_IS_WEAK (fragP
->fr_symbol
)))
5265 /* Symbol is undefined in this segment, or we need to keep a
5266 reloc so that weak symbols can be overridden. */
5267 int size
= (fragP
->fr_subtype
& CODE16
) ? 2 : 4;
5268 enum bfd_reloc_code_real reloc_type
;
5269 unsigned char *opcode
;
5272 if (fragP
->fr_var
!= NO_RELOC
)
5273 reloc_type
= fragP
->fr_var
;
5275 reloc_type
= BFD_RELOC_16_PCREL
;
5277 reloc_type
= BFD_RELOC_32_PCREL
;
5279 old_fr_fix
= fragP
->fr_fix
;
5280 opcode
= (unsigned char *) fragP
->fr_opcode
;
5282 switch (TYPE_FROM_RELAX_STATE (fragP
->fr_subtype
))
5285 /* Make jmp (0xeb) a (d)word displacement jump. */
5287 fragP
->fr_fix
+= size
;
5288 fix_new (fragP
, old_fr_fix
, size
,
5290 fragP
->fr_offset
, 1,
5296 && (!no_cond_jump_promotion
|| fragP
->fr_var
!= NO_RELOC
))
5298 /* Negate the condition, and branch past an
5299 unconditional jump. */
5302 /* Insert an unconditional jump. */
5304 /* We added two extra opcode bytes, and have a two byte
5306 fragP
->fr_fix
+= 2 + 2;
5307 fix_new (fragP
, old_fr_fix
+ 2, 2,
5309 fragP
->fr_offset
, 1,
5316 if (no_cond_jump_promotion
&& fragP
->fr_var
== NO_RELOC
)
5321 fixP
= fix_new (fragP
, old_fr_fix
, 1,
5323 fragP
->fr_offset
, 1,
5325 fixP
->fx_signed
= 1;
5329 /* This changes the byte-displacement jump 0x7N
5330 to the (d)word-displacement jump 0x0f,0x8N. */
5331 opcode
[1] = opcode
[0] + 0x10;
5332 opcode
[0] = TWO_BYTE_OPCODE_ESCAPE
;
5333 /* We've added an opcode byte. */
5334 fragP
->fr_fix
+= 1 + size
;
5335 fix_new (fragP
, old_fr_fix
+ 1, size
,
5337 fragP
->fr_offset
, 1,
5342 BAD_CASE (fragP
->fr_subtype
);
5346 return fragP
->fr_fix
- old_fr_fix
;
5349 /* Guess size depending on current relax state. Initially the relax
5350 state will correspond to a short jump and we return 1, because
5351 the variable part of the frag (the branch offset) is one byte
5352 long. However, we can relax a section more than once and in that
5353 case we must either set fr_subtype back to the unrelaxed state,
5354 or return the value for the appropriate branch. */
5355 return md_relax_table
[fragP
->fr_subtype
].rlx_length
;
5358 /* Called after relax() is finished.
5360 In: Address of frag.
5361 fr_type == rs_machine_dependent.
5362 fr_subtype is what the address relaxed to.
5364 Out: Any fixSs and constants are set up.
5365 Caller will turn frag into a ".space 0". */
5368 md_convert_frag (abfd
, sec
, fragP
)
5369 bfd
*abfd ATTRIBUTE_UNUSED
;
5370 segT sec ATTRIBUTE_UNUSED
;
5373 unsigned char *opcode
;
5374 unsigned char *where_to_put_displacement
= NULL
;
5375 offsetT target_address
;
5376 offsetT opcode_address
;
5377 unsigned int extension
= 0;
5378 offsetT displacement_from_opcode_start
;
5380 opcode
= (unsigned char *) fragP
->fr_opcode
;
5382 /* Address we want to reach in file space. */
5383 target_address
= S_GET_VALUE (fragP
->fr_symbol
) + fragP
->fr_offset
;
5385 /* Address opcode resides at in file space. */
5386 opcode_address
= fragP
->fr_address
+ fragP
->fr_fix
;
5388 /* Displacement from opcode start to fill into instruction. */
5389 displacement_from_opcode_start
= target_address
- opcode_address
;
5391 if ((fragP
->fr_subtype
& BIG
) == 0)
5393 /* Don't have to change opcode. */
5394 extension
= 1; /* 1 opcode + 1 displacement */
5395 where_to_put_displacement
= &opcode
[1];
5399 if (no_cond_jump_promotion
5400 && TYPE_FROM_RELAX_STATE (fragP
->fr_subtype
) != UNCOND_JUMP
)
5401 as_warn_where (fragP
->fr_file
, fragP
->fr_line
, _("long jump required"));
5403 switch (fragP
->fr_subtype
)
5405 case ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG
):
5406 extension
= 4; /* 1 opcode + 4 displacement */
5408 where_to_put_displacement
= &opcode
[1];
5411 case ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG16
):
5412 extension
= 2; /* 1 opcode + 2 displacement */
5414 where_to_put_displacement
= &opcode
[1];
5417 case ENCODE_RELAX_STATE (COND_JUMP
, BIG
):
5418 case ENCODE_RELAX_STATE (COND_JUMP86
, BIG
):
5419 extension
= 5; /* 2 opcode + 4 displacement */
5420 opcode
[1] = opcode
[0] + 0x10;
5421 opcode
[0] = TWO_BYTE_OPCODE_ESCAPE
;
5422 where_to_put_displacement
= &opcode
[2];
5425 case ENCODE_RELAX_STATE (COND_JUMP
, BIG16
):
5426 extension
= 3; /* 2 opcode + 2 displacement */
5427 opcode
[1] = opcode
[0] + 0x10;
5428 opcode
[0] = TWO_BYTE_OPCODE_ESCAPE
;
5429 where_to_put_displacement
= &opcode
[2];
5432 case ENCODE_RELAX_STATE (COND_JUMP86
, BIG16
):
5437 where_to_put_displacement
= &opcode
[3];
5441 BAD_CASE (fragP
->fr_subtype
);
5446 /* If size if less then four we are sure that the operand fits,
5447 but if it's 4, then it could be that the displacement is larger
5449 if (DISP_SIZE_FROM_RELAX_STATE (fragP
->fr_subtype
) == 4
5451 && ((addressT
) (displacement_from_opcode_start
- extension
5452 + ((addressT
) 1 << 31))
5453 > (((addressT
) 2 << 31) - 1)))
5455 as_bad_where (fragP
->fr_file
, fragP
->fr_line
,
5456 _("jump target out of range"));
5457 /* Make us emit 0. */
5458 displacement_from_opcode_start
= extension
;
5460 /* Now put displacement after opcode. */
5461 md_number_to_chars ((char *) where_to_put_displacement
,
5462 (valueT
) (displacement_from_opcode_start
- extension
),
5463 DISP_SIZE_FROM_RELAX_STATE (fragP
->fr_subtype
));
5464 fragP
->fr_fix
+= extension
;
5467 /* Size of byte displacement jmp. */
5468 int md_short_jump_size
= 2;
5470 /* Size of dword displacement jmp. */
5471 int md_long_jump_size
= 5;
5474 md_create_short_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
5476 addressT from_addr
, to_addr
;
5477 fragS
*frag ATTRIBUTE_UNUSED
;
5478 symbolS
*to_symbol ATTRIBUTE_UNUSED
;
5482 offset
= to_addr
- (from_addr
+ 2);
5483 /* Opcode for byte-disp jump. */
5484 md_number_to_chars (ptr
, (valueT
) 0xeb, 1);
5485 md_number_to_chars (ptr
+ 1, (valueT
) offset
, 1);
5489 md_create_long_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
5491 addressT from_addr
, to_addr
;
5492 fragS
*frag ATTRIBUTE_UNUSED
;
5493 symbolS
*to_symbol ATTRIBUTE_UNUSED
;
5497 offset
= to_addr
- (from_addr
+ 5);
5498 md_number_to_chars (ptr
, (valueT
) 0xe9, 1);
5499 md_number_to_chars (ptr
+ 1, (valueT
) offset
, 4);
5502 /* Apply a fixup (fixS) to segment data, once it has been determined
5503 by our caller that we have all the info we need to fix it up.
5505 On the 386, immediates, displacements, and data pointers are all in
5506 the same (little-endian) format, so we don't need to care about which
5510 md_apply_fix (fixP
, valP
, seg
)
5511 /* The fix we're to put in. */
5513 /* Pointer to the value of the bits. */
5515 /* Segment fix is from. */
5516 segT seg ATTRIBUTE_UNUSED
;
5518 char *p
= fixP
->fx_where
+ fixP
->fx_frag
->fr_literal
;
5519 valueT value
= *valP
;
5521 #if !defined (TE_Mach)
5524 switch (fixP
->fx_r_type
)
5530 fixP
->fx_r_type
= BFD_RELOC_64_PCREL
;
5533 case BFD_RELOC_X86_64_32S
:
5534 fixP
->fx_r_type
= BFD_RELOC_32_PCREL
;
5537 fixP
->fx_r_type
= BFD_RELOC_16_PCREL
;
5540 fixP
->fx_r_type
= BFD_RELOC_8_PCREL
;
5545 if (fixP
->fx_addsy
!= NULL
5546 && (fixP
->fx_r_type
== BFD_RELOC_32_PCREL
5547 || fixP
->fx_r_type
== BFD_RELOC_64_PCREL
5548 || fixP
->fx_r_type
== BFD_RELOC_16_PCREL
5549 || fixP
->fx_r_type
== BFD_RELOC_8_PCREL
)
5550 && !use_rela_relocations
)
5552 /* This is a hack. There should be a better way to handle this.
5553 This covers for the fact that bfd_install_relocation will
5554 subtract the current location (for partial_inplace, PC relative
5555 relocations); see more below. */
5559 || OUTPUT_FLAVOR
== bfd_target_coff_flavour
5562 value
+= fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
5564 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5567 segT sym_seg
= S_GET_SEGMENT (fixP
->fx_addsy
);
5570 || (symbol_section_p (fixP
->fx_addsy
)
5571 && sym_seg
!= absolute_section
))
5572 && !generic_force_reloc (fixP
))
5574 /* Yes, we add the values in twice. This is because
5575 bfd_install_relocation subtracts them out again. I think
5576 bfd_install_relocation is broken, but I don't dare change
5578 value
+= fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
5582 #if defined (OBJ_COFF) && defined (TE_PE)
5583 /* For some reason, the PE format does not store a
5584 section address offset for a PC relative symbol. */
5585 if (S_GET_SEGMENT (fixP
->fx_addsy
) != seg
5586 || S_IS_WEAK (fixP
->fx_addsy
))
5587 value
+= md_pcrel_from (fixP
);
5591 /* Fix a few things - the dynamic linker expects certain values here,
5592 and we must not disappoint it. */
5593 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5594 if (IS_ELF
&& fixP
->fx_addsy
)
5595 switch (fixP
->fx_r_type
)
5597 case BFD_RELOC_386_PLT32
:
5598 case BFD_RELOC_X86_64_PLT32
:
5599 /* Make the jump instruction point to the address of the operand. At
5600 runtime we merely add the offset to the actual PLT entry. */
5604 case BFD_RELOC_386_TLS_GD
:
5605 case BFD_RELOC_386_TLS_LDM
:
5606 case BFD_RELOC_386_TLS_IE_32
:
5607 case BFD_RELOC_386_TLS_IE
:
5608 case BFD_RELOC_386_TLS_GOTIE
:
5609 case BFD_RELOC_386_TLS_GOTDESC
:
5610 case BFD_RELOC_X86_64_TLSGD
:
5611 case BFD_RELOC_X86_64_TLSLD
:
5612 case BFD_RELOC_X86_64_GOTTPOFF
:
5613 case BFD_RELOC_X86_64_GOTPC32_TLSDESC
:
5614 value
= 0; /* Fully resolved at runtime. No addend. */
5616 case BFD_RELOC_386_TLS_LE
:
5617 case BFD_RELOC_386_TLS_LDO_32
:
5618 case BFD_RELOC_386_TLS_LE_32
:
5619 case BFD_RELOC_X86_64_DTPOFF32
:
5620 case BFD_RELOC_X86_64_DTPOFF64
:
5621 case BFD_RELOC_X86_64_TPOFF32
:
5622 case BFD_RELOC_X86_64_TPOFF64
:
5623 S_SET_THREAD_LOCAL (fixP
->fx_addsy
);
5626 case BFD_RELOC_386_TLS_DESC_CALL
:
5627 case BFD_RELOC_X86_64_TLSDESC_CALL
:
5628 value
= 0; /* Fully resolved at runtime. No addend. */
5629 S_SET_THREAD_LOCAL (fixP
->fx_addsy
);
5633 case BFD_RELOC_386_GOT32
:
5634 case BFD_RELOC_X86_64_GOT32
:
5635 value
= 0; /* Fully resolved at runtime. No addend. */
5638 case BFD_RELOC_VTABLE_INHERIT
:
5639 case BFD_RELOC_VTABLE_ENTRY
:
5646 #endif /* defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) */
5648 #endif /* !defined (TE_Mach) */
5650 /* Are we finished with this relocation now? */
5651 if (fixP
->fx_addsy
== NULL
)
5653 else if (use_rela_relocations
)
5655 fixP
->fx_no_overflow
= 1;
5656 /* Remember value for tc_gen_reloc. */
5657 fixP
->fx_addnumber
= value
;
5661 md_number_to_chars (p
, value
, fixP
->fx_size
);
5664 #define MAX_LITTLENUMS 6
5666 /* Turn the string pointed to by litP into a floating point constant
5667 of type TYPE, and emit the appropriate bytes. The number of
5668 LITTLENUMS emitted is stored in *SIZEP. An error message is
5669 returned, or NULL on OK. */
5672 md_atof (type
, litP
, sizeP
)
5678 LITTLENUM_TYPE words
[MAX_LITTLENUMS
];
5679 LITTLENUM_TYPE
*wordP
;
5701 return _("Bad call to md_atof ()");
5703 t
= atof_ieee (input_line_pointer
, type
, words
);
5705 input_line_pointer
= t
;
5707 *sizeP
= prec
* sizeof (LITTLENUM_TYPE
);
5708 /* This loops outputs the LITTLENUMs in REVERSE order; in accord with
5709 the bigendian 386. */
5710 for (wordP
= words
+ prec
- 1; prec
--;)
5712 md_number_to_chars (litP
, (valueT
) (*wordP
--), sizeof (LITTLENUM_TYPE
));
5713 litP
+= sizeof (LITTLENUM_TYPE
);
5718 static char output_invalid_buf
[sizeof (unsigned char) * 2 + 6];
5725 snprintf (output_invalid_buf
, sizeof (output_invalid_buf
),
5728 snprintf (output_invalid_buf
, sizeof (output_invalid_buf
),
5729 "(0x%x)", (unsigned char) c
);
5730 return output_invalid_buf
;
5733 /* REG_STRING starts *before* REGISTER_PREFIX. */
5735 static const reg_entry
*
5736 parse_real_register (char *reg_string
, char **end_op
)
5738 char *s
= reg_string
;
5740 char reg_name_given
[MAX_REG_NAME_SIZE
+ 1];
5743 /* Skip possible REGISTER_PREFIX and possible whitespace. */
5744 if (*s
== REGISTER_PREFIX
)
5747 if (is_space_char (*s
))
5751 while ((*p
++ = register_chars
[(unsigned char) *s
]) != '\0')
5753 if (p
>= reg_name_given
+ MAX_REG_NAME_SIZE
)
5754 return (const reg_entry
*) NULL
;
5758 /* For naked regs, make sure that we are not dealing with an identifier.
5759 This prevents confusing an identifier like `eax_var' with register
5761 if (allow_naked_reg
&& identifier_chars
[(unsigned char) *s
])
5762 return (const reg_entry
*) NULL
;
5766 r
= (const reg_entry
*) hash_find (reg_hash
, reg_name_given
);
5768 /* Handle floating point regs, allowing spaces in the (i) part. */
5769 if (r
== i386_regtab
/* %st is first entry of table */)
5771 if (is_space_char (*s
))
5776 if (is_space_char (*s
))
5778 if (*s
>= '0' && *s
<= '7')
5780 r
= &i386_float_regtab
[*s
- '0'];
5782 if (is_space_char (*s
))
5790 /* We have "%st(" then garbage. */
5791 return (const reg_entry
*) NULL
;
5796 && ((r
->reg_flags
& (RegRex64
| RegRex
)) | (r
->reg_type
& Reg64
)) != 0
5797 && (r
->reg_type
!= Control
|| !(cpu_arch_flags
& CpuSledgehammer
))
5798 && flag_code
!= CODE_64BIT
)
5799 return (const reg_entry
*) NULL
;
5804 /* REG_STRING starts *before* REGISTER_PREFIX. */
5806 static const reg_entry
*
5807 parse_register (char *reg_string
, char **end_op
)
5811 if (*reg_string
== REGISTER_PREFIX
|| allow_naked_reg
)
5812 r
= parse_real_register (reg_string
, end_op
);
5817 char *save
= input_line_pointer
;
5821 input_line_pointer
= reg_string
;
5822 c
= get_symbol_end ();
5823 symbolP
= symbol_find (reg_string
);
5824 if (symbolP
&& S_GET_SEGMENT (symbolP
) == reg_section
)
5826 const expressionS
*e
= symbol_get_value_expression (symbolP
);
5828 know (e
->X_op
== O_register
);
5829 know (e
->X_add_number
>= 0 && (valueT
) e
->X_add_number
< ARRAY_SIZE (i386_regtab
));
5830 r
= i386_regtab
+ e
->X_add_number
;
5831 *end_op
= input_line_pointer
;
5833 *input_line_pointer
= c
;
5834 input_line_pointer
= save
;
5840 i386_parse_name (char *name
, expressionS
*e
, char *nextcharP
)
5843 char *end
= input_line_pointer
;
5846 r
= parse_register (name
, &input_line_pointer
);
5847 if (r
&& end
<= input_line_pointer
)
5849 *nextcharP
= *input_line_pointer
;
5850 *input_line_pointer
= 0;
5851 e
->X_op
= O_register
;
5852 e
->X_add_number
= r
- i386_regtab
;
5855 input_line_pointer
= end
;
5861 md_operand (expressionS
*e
)
5863 if (*input_line_pointer
== REGISTER_PREFIX
)
5866 const reg_entry
*r
= parse_real_register (input_line_pointer
, &end
);
5870 e
->X_op
= O_register
;
5871 e
->X_add_number
= r
- i386_regtab
;
5872 input_line_pointer
= end
;
5878 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5879 const char *md_shortopts
= "kVQ:sqn";
5881 const char *md_shortopts
= "qn";
5884 #define OPTION_32 (OPTION_MD_BASE + 0)
5885 #define OPTION_64 (OPTION_MD_BASE + 1)
5886 #define OPTION_DIVIDE (OPTION_MD_BASE + 2)
5887 #define OPTION_MARCH (OPTION_MD_BASE + 3)
5888 #define OPTION_MTUNE (OPTION_MD_BASE + 4)
5890 struct option md_longopts
[] =
5892 {"32", no_argument
, NULL
, OPTION_32
},
5893 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) || defined(TE_PEP)
5894 {"64", no_argument
, NULL
, OPTION_64
},
5896 {"divide", no_argument
, NULL
, OPTION_DIVIDE
},
5897 {"march", required_argument
, NULL
, OPTION_MARCH
},
5898 {"mtune", required_argument
, NULL
, OPTION_MTUNE
},
5899 {NULL
, no_argument
, NULL
, 0}
5901 size_t md_longopts_size
= sizeof (md_longopts
);
5904 md_parse_option (int c
, char *arg
)
5911 optimize_align_code
= 0;
5918 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5919 /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section
5920 should be emitted or not. FIXME: Not implemented. */
5924 /* -V: SVR4 argument to print version ID. */
5926 print_version_id ();
5929 /* -k: Ignore for FreeBSD compatibility. */
5934 /* -s: On i386 Solaris, this tells the native assembler to use
5935 .stab instead of .stab.excl. We always use .stab anyhow. */
5938 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) || defined(TE_PEP)
5941 const char **list
, **l
;
5943 list
= bfd_target_list ();
5944 for (l
= list
; *l
!= NULL
; l
++)
5945 if (CONST_STRNEQ (*l
, "elf64-x86-64")
5946 || strcmp (*l
, "coff-x86-64") == 0
5947 || strcmp (*l
, "pe-x86-64") == 0
5948 || strcmp (*l
, "pei-x86-64") == 0)
5950 default_arch
= "x86_64";
5954 as_fatal (_("No compiled in support for x86_64"));
5961 default_arch
= "i386";
5965 #ifdef SVR4_COMMENT_CHARS
5970 n
= (char *) xmalloc (strlen (i386_comment_chars
) + 1);
5972 for (s
= i386_comment_chars
; *s
!= '\0'; s
++)
5976 i386_comment_chars
= n
;
5983 as_fatal (_("Invalid -march= option: `%s'"), arg
);
5984 for (i
= 0; i
< ARRAY_SIZE (cpu_arch
); i
++)
5986 if (strcmp (arg
, cpu_arch
[i
].name
) == 0)
5988 cpu_arch_isa
= cpu_arch
[i
].type
;
5989 cpu_arch_isa_flags
= cpu_arch
[i
].flags
;
5990 if (!cpu_arch_tune_set
)
5992 cpu_arch_tune
= cpu_arch_isa
;
5993 cpu_arch_tune_flags
= cpu_arch_isa_flags
;
5998 if (i
>= ARRAY_SIZE (cpu_arch
))
5999 as_fatal (_("Invalid -march= option: `%s'"), arg
);
6004 as_fatal (_("Invalid -mtune= option: `%s'"), arg
);
6005 for (i
= 0; i
< ARRAY_SIZE (cpu_arch
); i
++)
6007 if (strcmp (arg
, cpu_arch
[i
].name
) == 0)
6009 cpu_arch_tune_set
= 1;
6010 cpu_arch_tune
= cpu_arch
[i
].type
;
6011 cpu_arch_tune_flags
= cpu_arch
[i
].flags
;
6015 if (i
>= ARRAY_SIZE (cpu_arch
))
6016 as_fatal (_("Invalid -mtune= option: `%s'"), arg
);
6026 md_show_usage (stream
)
6029 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
6030 fprintf (stream
, _("\
6032 -V print assembler version number\n\
6035 fprintf (stream
, _("\
6036 -n Do not optimize code alignment\n\
6037 -q quieten some warnings\n"));
6038 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
6039 fprintf (stream
, _("\
6042 #ifdef SVR4_COMMENT_CHARS
6043 fprintf (stream
, _("\
6044 --divide do not treat `/' as a comment character\n"));
6046 fprintf (stream
, _("\
6047 --divide ignored\n"));
6049 fprintf (stream
, _("\
6050 -march=CPU/-mtune=CPU generate code/optimize for CPU, where CPU is one of:\n\
6051 i386, i486, pentium, pentiumpro, pentium4, nocona,\n\
6052 core, core2, k6, athlon, k8, generic32, generic64\n"));
6058 x86_64_target_format (void)
6060 if (strcmp (default_arch
, "x86_64") == 0)
6062 set_code_flag (CODE_64BIT
);
6063 return COFF_TARGET_FORMAT
;
6065 else if (strcmp (default_arch
, "i386") == 0)
6067 set_code_flag (CODE_32BIT
);
6071 as_fatal (_("Unknown architecture"));
6076 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
6077 || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF))
6079 /* Pick the target format to use. */
6082 i386_target_format ()
6084 if (!strcmp (default_arch
, "x86_64"))
6086 set_code_flag (CODE_64BIT
);
6087 if (cpu_arch_isa_flags
== 0)
6088 cpu_arch_isa_flags
= Cpu186
|Cpu286
|Cpu386
|Cpu486
6089 |Cpu586
|Cpu686
|CpuP4
|CpuMMX
|CpuMMX2
6091 if (cpu_arch_tune_flags
== 0)
6092 cpu_arch_tune_flags
= Cpu186
|Cpu286
|Cpu386
|Cpu486
6093 |Cpu586
|Cpu686
|CpuP4
|CpuMMX
|CpuMMX2
6096 else if (!strcmp (default_arch
, "i386"))
6098 set_code_flag (CODE_32BIT
);
6099 if (cpu_arch_isa_flags
== 0)
6100 cpu_arch_isa_flags
= Cpu186
|Cpu286
|Cpu386
;
6101 if (cpu_arch_tune_flags
== 0)
6102 cpu_arch_tune_flags
= Cpu186
|Cpu286
|Cpu386
;
6105 as_fatal (_("Unknown architecture"));
6106 switch (OUTPUT_FLAVOR
)
6108 #ifdef OBJ_MAYBE_AOUT
6109 case bfd_target_aout_flavour
:
6110 return AOUT_TARGET_FORMAT
;
6112 #ifdef OBJ_MAYBE_COFF
6113 case bfd_target_coff_flavour
:
6116 #if defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF)
6117 case bfd_target_elf_flavour
:
6119 if (flag_code
== CODE_64BIT
)
6122 use_rela_relocations
= 1;
6124 return flag_code
== CODE_64BIT
? ELF_TARGET_FORMAT64
: ELF_TARGET_FORMAT
;
6133 #endif /* OBJ_MAYBE_ more than one */
6135 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF))
6136 void i386_elf_emit_arch_note ()
6138 if (IS_ELF
&& cpu_arch_name
!= NULL
)
6141 asection
*seg
= now_seg
;
6142 subsegT subseg
= now_subseg
;
6143 Elf_Internal_Note i_note
;
6144 Elf_External_Note e_note
;
6145 asection
*note_secp
;
6148 /* Create the .note section. */
6149 note_secp
= subseg_new (".note", 0);
6150 bfd_set_section_flags (stdoutput
,
6152 SEC_HAS_CONTENTS
| SEC_READONLY
);
6154 /* Process the arch string. */
6155 len
= strlen (cpu_arch_name
);
6157 i_note
.namesz
= len
+ 1;
6159 i_note
.type
= NT_ARCH
;
6160 p
= frag_more (sizeof (e_note
.namesz
));
6161 md_number_to_chars (p
, (valueT
) i_note
.namesz
, sizeof (e_note
.namesz
));
6162 p
= frag_more (sizeof (e_note
.descsz
));
6163 md_number_to_chars (p
, (valueT
) i_note
.descsz
, sizeof (e_note
.descsz
));
6164 p
= frag_more (sizeof (e_note
.type
));
6165 md_number_to_chars (p
, (valueT
) i_note
.type
, sizeof (e_note
.type
));
6166 p
= frag_more (len
+ 1);
6167 strcpy (p
, cpu_arch_name
);
6169 frag_align (2, 0, 0);
6171 subseg_set (seg
, subseg
);
6177 md_undefined_symbol (name
)
6180 if (name
[0] == GLOBAL_OFFSET_TABLE_NAME
[0]
6181 && name
[1] == GLOBAL_OFFSET_TABLE_NAME
[1]
6182 && name
[2] == GLOBAL_OFFSET_TABLE_NAME
[2]
6183 && strcmp (name
, GLOBAL_OFFSET_TABLE_NAME
) == 0)
6187 if (symbol_find (name
))
6188 as_bad (_("GOT already in symbol table"));
6189 GOT_symbol
= symbol_new (name
, undefined_section
,
6190 (valueT
) 0, &zero_address_frag
);
6197 /* Round up a section size to the appropriate boundary. */
6200 md_section_align (segment
, size
)
6201 segT segment ATTRIBUTE_UNUSED
;
6204 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
6205 if (OUTPUT_FLAVOR
== bfd_target_aout_flavour
)
6207 /* For a.out, force the section size to be aligned. If we don't do
6208 this, BFD will align it for us, but it will not write out the
6209 final bytes of the section. This may be a bug in BFD, but it is
6210 easier to fix it here since that is how the other a.out targets
6214 align
= bfd_get_section_alignment (stdoutput
, segment
);
6215 size
= ((size
+ (1 << align
) - 1) & ((valueT
) -1 << align
));
6222 /* On the i386, PC-relative offsets are relative to the start of the
6223 next instruction. That is, the address of the offset, plus its
6224 size, since the offset is always the last part of the insn. */
6227 md_pcrel_from (fixP
)
6230 return fixP
->fx_size
+ fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
6237 int ignore ATTRIBUTE_UNUSED
;
6241 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
6243 obj_elf_section_change_hook ();
6245 temp
= get_absolute_expression ();
6246 subseg_set (bss_section
, (subsegT
) temp
);
6247 demand_empty_rest_of_line ();
6253 i386_validate_fix (fixp
)
6256 if (fixp
->fx_subsy
&& fixp
->fx_subsy
== GOT_symbol
)
6258 if (fixp
->fx_r_type
== BFD_RELOC_32_PCREL
)
6262 fixp
->fx_r_type
= BFD_RELOC_X86_64_GOTPCREL
;
6267 fixp
->fx_r_type
= BFD_RELOC_386_GOTOFF
;
6269 fixp
->fx_r_type
= BFD_RELOC_X86_64_GOTOFF64
;
6276 tc_gen_reloc (section
, fixp
)
6277 asection
*section ATTRIBUTE_UNUSED
;
6281 bfd_reloc_code_real_type code
;
6283 switch (fixp
->fx_r_type
)
6285 case BFD_RELOC_X86_64_PLT32
:
6286 case BFD_RELOC_X86_64_GOT32
:
6287 case BFD_RELOC_X86_64_GOTPCREL
:
6288 case BFD_RELOC_386_PLT32
:
6289 case BFD_RELOC_386_GOT32
:
6290 case BFD_RELOC_386_GOTOFF
:
6291 case BFD_RELOC_386_GOTPC
:
6292 case BFD_RELOC_386_TLS_GD
:
6293 case BFD_RELOC_386_TLS_LDM
:
6294 case BFD_RELOC_386_TLS_LDO_32
:
6295 case BFD_RELOC_386_TLS_IE_32
:
6296 case BFD_RELOC_386_TLS_IE
:
6297 case BFD_RELOC_386_TLS_GOTIE
:
6298 case BFD_RELOC_386_TLS_LE_32
:
6299 case BFD_RELOC_386_TLS_LE
:
6300 case BFD_RELOC_386_TLS_GOTDESC
:
6301 case BFD_RELOC_386_TLS_DESC_CALL
:
6302 case BFD_RELOC_X86_64_TLSGD
:
6303 case BFD_RELOC_X86_64_TLSLD
:
6304 case BFD_RELOC_X86_64_DTPOFF32
:
6305 case BFD_RELOC_X86_64_DTPOFF64
:
6306 case BFD_RELOC_X86_64_GOTTPOFF
:
6307 case BFD_RELOC_X86_64_TPOFF32
:
6308 case BFD_RELOC_X86_64_TPOFF64
:
6309 case BFD_RELOC_X86_64_GOTOFF64
:
6310 case BFD_RELOC_X86_64_GOTPC32
:
6311 case BFD_RELOC_X86_64_GOT64
:
6312 case BFD_RELOC_X86_64_GOTPCREL64
:
6313 case BFD_RELOC_X86_64_GOTPC64
:
6314 case BFD_RELOC_X86_64_GOTPLT64
:
6315 case BFD_RELOC_X86_64_PLTOFF64
:
6316 case BFD_RELOC_X86_64_GOTPC32_TLSDESC
:
6317 case BFD_RELOC_X86_64_TLSDESC_CALL
:
6319 case BFD_RELOC_VTABLE_ENTRY
:
6320 case BFD_RELOC_VTABLE_INHERIT
:
6322 case BFD_RELOC_32_SECREL
:
6324 code
= fixp
->fx_r_type
;
6326 case BFD_RELOC_X86_64_32S
:
6327 if (!fixp
->fx_pcrel
)
6329 /* Don't turn BFD_RELOC_X86_64_32S into BFD_RELOC_32. */
6330 code
= fixp
->fx_r_type
;
6336 switch (fixp
->fx_size
)
6339 as_bad_where (fixp
->fx_file
, fixp
->fx_line
,
6340 _("can not do %d byte pc-relative relocation"),
6342 code
= BFD_RELOC_32_PCREL
;
6344 case 1: code
= BFD_RELOC_8_PCREL
; break;
6345 case 2: code
= BFD_RELOC_16_PCREL
; break;
6346 case 4: code
= BFD_RELOC_32_PCREL
; break;
6348 case 8: code
= BFD_RELOC_64_PCREL
; break;
6354 switch (fixp
->fx_size
)
6357 as_bad_where (fixp
->fx_file
, fixp
->fx_line
,
6358 _("can not do %d byte relocation"),
6360 code
= BFD_RELOC_32
;
6362 case 1: code
= BFD_RELOC_8
; break;
6363 case 2: code
= BFD_RELOC_16
; break;
6364 case 4: code
= BFD_RELOC_32
; break;
6366 case 8: code
= BFD_RELOC_64
; break;
6373 if ((code
== BFD_RELOC_32
6374 || code
== BFD_RELOC_32_PCREL
6375 || code
== BFD_RELOC_X86_64_32S
)
6377 && fixp
->fx_addsy
== GOT_symbol
)
6380 code
= BFD_RELOC_386_GOTPC
;
6382 code
= BFD_RELOC_X86_64_GOTPC32
;
6384 if ((code
== BFD_RELOC_64
|| code
== BFD_RELOC_64_PCREL
)
6386 && fixp
->fx_addsy
== GOT_symbol
)
6388 code
= BFD_RELOC_X86_64_GOTPC64
;
6391 rel
= (arelent
*) xmalloc (sizeof (arelent
));
6392 rel
->sym_ptr_ptr
= (asymbol
**) xmalloc (sizeof (asymbol
*));
6393 *rel
->sym_ptr_ptr
= symbol_get_bfdsym (fixp
->fx_addsy
);
6395 rel
->address
= fixp
->fx_frag
->fr_address
+ fixp
->fx_where
;
6397 if (!use_rela_relocations
)
6399 /* HACK: Since i386 ELF uses Rel instead of Rela, encode the
6400 vtable entry to be used in the relocation's section offset. */
6401 if (fixp
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)
6402 rel
->address
= fixp
->fx_offset
;
6406 /* Use the rela in 64bit mode. */
6409 if (!fixp
->fx_pcrel
)
6410 rel
->addend
= fixp
->fx_offset
;
6414 case BFD_RELOC_X86_64_PLT32
:
6415 case BFD_RELOC_X86_64_GOT32
:
6416 case BFD_RELOC_X86_64_GOTPCREL
:
6417 case BFD_RELOC_X86_64_TLSGD
:
6418 case BFD_RELOC_X86_64_TLSLD
:
6419 case BFD_RELOC_X86_64_GOTTPOFF
:
6420 case BFD_RELOC_X86_64_GOTPC32_TLSDESC
:
6421 case BFD_RELOC_X86_64_TLSDESC_CALL
:
6422 rel
->addend
= fixp
->fx_offset
- fixp
->fx_size
;
6425 rel
->addend
= (section
->vma
6427 + fixp
->fx_addnumber
6428 + md_pcrel_from (fixp
));
6433 rel
->howto
= bfd_reloc_type_lookup (stdoutput
, code
);
6434 if (rel
->howto
== NULL
)
6436 as_bad_where (fixp
->fx_file
, fixp
->fx_line
,
6437 _("cannot represent relocation type %s"),
6438 bfd_get_reloc_code_name (code
));
6439 /* Set howto to a garbage value so that we can keep going. */
6440 rel
->howto
= bfd_reloc_type_lookup (stdoutput
, BFD_RELOC_32
);
6441 assert (rel
->howto
!= NULL
);
6448 /* Parse operands using Intel syntax. This implements a recursive descent
6449 parser based on the BNF grammar published in Appendix B of the MASM 6.1
6452 FIXME: We do not recognize the full operand grammar defined in the MASM
6453 documentation. In particular, all the structure/union and
6454 high-level macro operands are missing.
6456 Uppercase words are terminals, lower case words are non-terminals.
6457 Objects surrounded by double brackets '[[' ']]' are optional. Vertical
6458 bars '|' denote choices. Most grammar productions are implemented in
6459 functions called 'intel_<production>'.
6461 Initial production is 'expr'.
6467 binOp & | AND | \| | OR | ^ | XOR
6469 byteRegister AL | AH | BL | BH | CL | CH | DL | DH
6471 constant digits [[ radixOverride ]]
6473 dataType BYTE | WORD | DWORD | FWORD | QWORD | TBYTE | OWORD | XMMWORD
6511 => expr expr cmpOp e04
6514 gpRegister AX | EAX | BX | EBX | CX | ECX | DX | EDX
6515 | BP | EBP | SP | ESP | DI | EDI | SI | ESI
6517 hexdigit a | b | c | d | e | f
6518 | A | B | C | D | E | F
6524 mulOp * | / | % | MOD | << | SHL | >> | SHR
6528 register specialRegister
6532 segmentRegister CS | DS | ES | FS | GS | SS
6534 specialRegister CR0 | CR2 | CR3 | CR4
6535 | DR0 | DR1 | DR2 | DR3 | DR6 | DR7
6536 | TR3 | TR4 | TR5 | TR6 | TR7
6538 We simplify the grammar in obvious places (e.g., register parsing is
6539 done by calling parse_register) and eliminate immediate left recursion
6540 to implement a recursive-descent parser.
6544 expr' cmpOp e04 expr'
6595 /* Parsing structure for the intel syntax parser. Used to implement the
6596 semantic actions for the operand grammar. */
6597 struct intel_parser_s
6599 char *op_string
; /* The string being parsed. */
6600 int got_a_float
; /* Whether the operand is a float. */
6601 int op_modifier
; /* Operand modifier. */
6602 int is_mem
; /* 1 if operand is memory reference. */
6603 int in_offset
; /* >=1 if parsing operand of offset. */
6604 int in_bracket
; /* >=1 if parsing operand in brackets. */
6605 const reg_entry
*reg
; /* Last register reference found. */
6606 char *disp
; /* Displacement string being built. */
6607 char *next_operand
; /* Resume point when splitting operands. */
6610 static struct intel_parser_s intel_parser
;
6612 /* Token structure for parsing intel syntax. */
6615 int code
; /* Token code. */
6616 const reg_entry
*reg
; /* Register entry for register tokens. */
6617 char *str
; /* String representation. */
6620 static struct intel_token cur_token
, prev_token
;
6622 /* Token codes for the intel parser. Since T_SHORT is already used
6623 by COFF, undefine it first to prevent a warning. */
6642 /* Prototypes for intel parser functions. */
6643 static int intel_match_token
PARAMS ((int code
));
6644 static void intel_get_token
PARAMS ((void));
6645 static void intel_putback_token
PARAMS ((void));
6646 static int intel_expr
PARAMS ((void));
6647 static int intel_e04
PARAMS ((void));
6648 static int intel_e05
PARAMS ((void));
6649 static int intel_e06
PARAMS ((void));
6650 static int intel_e09
PARAMS ((void));
6651 static int intel_bracket_expr
PARAMS ((void));
6652 static int intel_e10
PARAMS ((void));
6653 static int intel_e11
PARAMS ((void));
6656 i386_intel_operand (operand_string
, got_a_float
)
6657 char *operand_string
;
6663 p
= intel_parser
.op_string
= xstrdup (operand_string
);
6664 intel_parser
.disp
= (char *) xmalloc (strlen (operand_string
) + 1);
6668 /* Initialize token holders. */
6669 cur_token
.code
= prev_token
.code
= T_NIL
;
6670 cur_token
.reg
= prev_token
.reg
= NULL
;
6671 cur_token
.str
= prev_token
.str
= NULL
;
6673 /* Initialize parser structure. */
6674 intel_parser
.got_a_float
= got_a_float
;
6675 intel_parser
.op_modifier
= 0;
6676 intel_parser
.is_mem
= 0;
6677 intel_parser
.in_offset
= 0;
6678 intel_parser
.in_bracket
= 0;
6679 intel_parser
.reg
= NULL
;
6680 intel_parser
.disp
[0] = '\0';
6681 intel_parser
.next_operand
= NULL
;
6683 /* Read the first token and start the parser. */
6685 ret
= intel_expr ();
6690 if (cur_token
.code
!= T_NIL
)
6692 as_bad (_("invalid operand for '%s' ('%s' unexpected)"),
6693 current_templates
->start
->name
, cur_token
.str
);
6696 /* If we found a memory reference, hand it over to i386_displacement
6697 to fill in the rest of the operand fields. */
6698 else if (intel_parser
.is_mem
)
6700 if ((i
.mem_operands
== 1
6701 && (current_templates
->start
->opcode_modifier
& IsString
) == 0)
6702 || i
.mem_operands
== 2)
6704 as_bad (_("too many memory references for '%s'"),
6705 current_templates
->start
->name
);
6710 char *s
= intel_parser
.disp
;
6713 if (!quiet_warnings
&& intel_parser
.is_mem
< 0)
6714 /* See the comments in intel_bracket_expr. */
6715 as_warn (_("Treating `%s' as memory reference"), operand_string
);
6717 /* Add the displacement expression. */
6719 ret
= i386_displacement (s
, s
+ strlen (s
));
6722 /* Swap base and index in 16-bit memory operands like
6723 [si+bx]. Since i386_index_check is also used in AT&T
6724 mode we have to do that here. */
6727 && (i
.base_reg
->reg_type
& Reg16
)
6728 && (i
.index_reg
->reg_type
& Reg16
)
6729 && i
.base_reg
->reg_num
>= 6
6730 && i
.index_reg
->reg_num
< 6)
6732 const reg_entry
*base
= i
.index_reg
;
6734 i
.index_reg
= i
.base_reg
;
6737 ret
= i386_index_check (operand_string
);
6742 /* Constant and OFFSET expressions are handled by i386_immediate. */
6743 else if ((intel_parser
.op_modifier
& (1 << T_OFFSET
))
6744 || intel_parser
.reg
== NULL
)
6745 ret
= i386_immediate (intel_parser
.disp
);
6747 if (intel_parser
.next_operand
&& this_operand
>= MAX_OPERANDS
- 1)
6749 if (!ret
|| !intel_parser
.next_operand
)
6751 intel_parser
.op_string
= intel_parser
.next_operand
;
6752 this_operand
= i
.operands
++;
6756 free (intel_parser
.disp
);
6761 #define NUM_ADDRESS_REGS (!!i.base_reg + !!i.index_reg)
6765 expr' cmpOp e04 expr'
6770 /* XXX Implement the comparison operators. */
6771 return intel_e04 ();
6788 if (nregs
>= 0 && NUM_ADDRESS_REGS
> nregs
)
6789 i
.base_reg
= i386_regtab
+ REGNAM_AL
; /* al is invalid as base */
6791 if (cur_token
.code
== '+')
6793 else if (cur_token
.code
== '-')
6794 nregs
= NUM_ADDRESS_REGS
;
6798 strcat (intel_parser
.disp
, cur_token
.str
);
6799 intel_match_token (cur_token
.code
);
6810 int nregs
= ~NUM_ADDRESS_REGS
;
6817 if (cur_token
.code
== '&' || cur_token
.code
== '|' || cur_token
.code
== '^')
6821 str
[0] = cur_token
.code
;
6823 strcat (intel_parser
.disp
, str
);
6828 intel_match_token (cur_token
.code
);
6833 if (nregs
>= 0 && NUM_ADDRESS_REGS
> nregs
)
6834 i
.base_reg
= i386_regtab
+ REGNAM_AL
+ 1; /* cl is invalid as base */
6845 int nregs
= ~NUM_ADDRESS_REGS
;
6852 if (cur_token
.code
== '*' || cur_token
.code
== '/' || cur_token
.code
== '%')
6856 str
[0] = cur_token
.code
;
6858 strcat (intel_parser
.disp
, str
);
6860 else if (cur_token
.code
== T_SHL
)
6861 strcat (intel_parser
.disp
, "<<");
6862 else if (cur_token
.code
== T_SHR
)
6863 strcat (intel_parser
.disp
, ">>");
6867 intel_match_token (cur_token
.code
);
6872 if (nregs
>= 0 && NUM_ADDRESS_REGS
> nregs
)
6873 i
.base_reg
= i386_regtab
+ REGNAM_AL
+ 2; /* dl is invalid as base */
6891 int nregs
= ~NUM_ADDRESS_REGS
;
6896 /* Don't consume constants here. */
6897 if (cur_token
.code
== '+' || cur_token
.code
== '-')
6899 /* Need to look one token ahead - if the next token
6900 is a constant, the current token is its sign. */
6903 intel_match_token (cur_token
.code
);
6904 next_code
= cur_token
.code
;
6905 intel_putback_token ();
6906 if (next_code
== T_CONST
)
6910 /* e09 OFFSET e09 */
6911 if (cur_token
.code
== T_OFFSET
)
6914 ++intel_parser
.in_offset
;
6918 else if (cur_token
.code
== T_SHORT
)
6919 intel_parser
.op_modifier
|= 1 << T_SHORT
;
6922 else if (cur_token
.code
== '+')
6923 strcat (intel_parser
.disp
, "+");
6928 else if (cur_token
.code
== '-' || cur_token
.code
== '~')
6934 str
[0] = cur_token
.code
;
6936 strcat (intel_parser
.disp
, str
);
6943 intel_match_token (cur_token
.code
);
6951 /* e09' PTR e10 e09' */
6952 if (cur_token
.code
== T_PTR
)
6956 if (prev_token
.code
== T_BYTE
)
6957 suffix
= BYTE_MNEM_SUFFIX
;
6959 else if (prev_token
.code
== T_WORD
)
6961 if (current_templates
->start
->name
[0] == 'l'
6962 && current_templates
->start
->name
[2] == 's'
6963 && current_templates
->start
->name
[3] == 0)
6964 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
6965 else if (intel_parser
.got_a_float
== 2) /* "fi..." */
6966 suffix
= SHORT_MNEM_SUFFIX
;
6968 suffix
= WORD_MNEM_SUFFIX
;
6971 else if (prev_token
.code
== T_DWORD
)
6973 if (current_templates
->start
->name
[0] == 'l'
6974 && current_templates
->start
->name
[2] == 's'
6975 && current_templates
->start
->name
[3] == 0)
6976 suffix
= WORD_MNEM_SUFFIX
;
6977 else if (flag_code
== CODE_16BIT
6978 && (current_templates
->start
->opcode_modifier
6979 & (Jump
| JumpDword
)))
6980 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
6981 else if (intel_parser
.got_a_float
== 1) /* "f..." */
6982 suffix
= SHORT_MNEM_SUFFIX
;
6984 suffix
= LONG_MNEM_SUFFIX
;
6987 else if (prev_token
.code
== T_FWORD
)
6989 if (current_templates
->start
->name
[0] == 'l'
6990 && current_templates
->start
->name
[2] == 's'
6991 && current_templates
->start
->name
[3] == 0)
6992 suffix
= LONG_MNEM_SUFFIX
;
6993 else if (!intel_parser
.got_a_float
)
6995 if (flag_code
== CODE_16BIT
)
6996 add_prefix (DATA_PREFIX_OPCODE
);
6997 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
7000 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
7003 else if (prev_token
.code
== T_QWORD
)
7005 if (intel_parser
.got_a_float
== 1) /* "f..." */
7006 suffix
= LONG_MNEM_SUFFIX
;
7008 suffix
= QWORD_MNEM_SUFFIX
;
7011 else if (prev_token
.code
== T_TBYTE
)
7013 if (intel_parser
.got_a_float
== 1)
7014 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
7016 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
7019 else if (prev_token
.code
== T_XMMWORD
)
7021 /* XXX ignored for now, but accepted since gcc uses it */
7027 as_bad (_("Unknown operand modifier `%s'"), prev_token
.str
);
7031 /* Operands for jump/call using 'ptr' notation denote absolute
7033 if (current_templates
->start
->opcode_modifier
& (Jump
| JumpDword
))
7034 i
.types
[this_operand
] |= JumpAbsolute
;
7036 if (current_templates
->start
->base_opcode
== 0x8d /* lea */)
7040 else if (i
.suffix
!= suffix
)
7042 as_bad (_("Conflicting operand modifiers"));
7048 /* e09' : e10 e09' */
7049 else if (cur_token
.code
== ':')
7051 if (prev_token
.code
!= T_REG
)
7053 /* While {call,jmp} SSSS:OOOO is MASM syntax only when SSSS is a
7054 segment/group identifier (which we don't have), using comma
7055 as the operand separator there is even less consistent, since
7056 there all branches only have a single operand. */
7057 if (this_operand
!= 0
7058 || intel_parser
.in_offset
7059 || intel_parser
.in_bracket
7060 || (!(current_templates
->start
->opcode_modifier
7061 & (Jump
|JumpDword
|JumpInterSegment
))
7062 && !(current_templates
->start
->operand_types
[0]
7064 return intel_match_token (T_NIL
);
7065 /* Remember the start of the 2nd operand and terminate 1st
7067 XXX This isn't right, yet (when SSSS:OOOO is right operand of
7068 another expression), but it gets at least the simplest case
7069 (a plain number or symbol on the left side) right. */
7070 intel_parser
.next_operand
= intel_parser
.op_string
;
7071 *--intel_parser
.op_string
= '\0';
7072 return intel_match_token (':');
7080 intel_match_token (cur_token
.code
);
7086 --intel_parser
.in_offset
;
7089 if (NUM_ADDRESS_REGS
> nregs
)
7091 as_bad (_("Invalid operand to `OFFSET'"));
7094 intel_parser
.op_modifier
|= 1 << T_OFFSET
;
7097 if (nregs
>= 0 && NUM_ADDRESS_REGS
> nregs
)
7098 i
.base_reg
= i386_regtab
+ REGNAM_AL
+ 3; /* bl is invalid as base */
7103 intel_bracket_expr ()
7105 int was_offset
= intel_parser
.op_modifier
& (1 << T_OFFSET
);
7106 const char *start
= intel_parser
.op_string
;
7109 if (i
.op
[this_operand
].regs
)
7110 return intel_match_token (T_NIL
);
7112 intel_match_token ('[');
7114 /* Mark as a memory operand only if it's not already known to be an
7115 offset expression. If it's an offset expression, we need to keep
7117 if (!intel_parser
.in_offset
)
7119 ++intel_parser
.in_bracket
;
7121 /* Operands for jump/call inside brackets denote absolute addresses. */
7122 if (current_templates
->start
->opcode_modifier
& (Jump
| JumpDword
))
7123 i
.types
[this_operand
] |= JumpAbsolute
;
7125 /* Unfortunately gas always diverged from MASM in a respect that can't
7126 be easily fixed without risking to break code sequences likely to be
7127 encountered (the testsuite even check for this): MASM doesn't consider
7128 an expression inside brackets unconditionally as a memory reference.
7129 When that is e.g. a constant, an offset expression, or the sum of the
7130 two, this is still taken as a constant load. gas, however, always
7131 treated these as memory references. As a compromise, we'll try to make
7132 offset expressions inside brackets work the MASM way (since that's
7133 less likely to be found in real world code), but make constants alone
7134 continue to work the traditional gas way. In either case, issue a
7136 intel_parser
.op_modifier
&= ~was_offset
;
7139 strcat (intel_parser
.disp
, "[");
7141 /* Add a '+' to the displacement string if necessary. */
7142 if (*intel_parser
.disp
!= '\0'
7143 && *(intel_parser
.disp
+ strlen (intel_parser
.disp
) - 1) != '+')
7144 strcat (intel_parser
.disp
, "+");
7147 && (len
= intel_parser
.op_string
- start
- 1,
7148 intel_match_token (']')))
7150 /* Preserve brackets when the operand is an offset expression. */
7151 if (intel_parser
.in_offset
)
7152 strcat (intel_parser
.disp
, "]");
7155 --intel_parser
.in_bracket
;
7156 if (i
.base_reg
|| i
.index_reg
)
7157 intel_parser
.is_mem
= 1;
7158 if (!intel_parser
.is_mem
)
7160 if (!(intel_parser
.op_modifier
& (1 << T_OFFSET
)))
7161 /* Defer the warning until all of the operand was parsed. */
7162 intel_parser
.is_mem
= -1;
7163 else if (!quiet_warnings
)
7164 as_warn (_("`[%.*s]' taken to mean just `%.*s'"), len
, start
, len
, start
);
7167 intel_parser
.op_modifier
|= was_offset
;
7184 while (cur_token
.code
== '[')
7186 if (!intel_bracket_expr ())
7211 switch (cur_token
.code
)
7215 intel_match_token ('(');
7216 strcat (intel_parser
.disp
, "(");
7218 if (intel_expr () && intel_match_token (')'))
7220 strcat (intel_parser
.disp
, ")");
7227 return intel_bracket_expr ();
7232 strcat (intel_parser
.disp
, cur_token
.str
);
7233 intel_match_token (cur_token
.code
);
7235 /* Mark as a memory operand only if it's not already known to be an
7236 offset expression. */
7237 if (!intel_parser
.in_offset
)
7238 intel_parser
.is_mem
= 1;
7245 const reg_entry
*reg
= intel_parser
.reg
= cur_token
.reg
;
7247 intel_match_token (T_REG
);
7249 /* Check for segment change. */
7250 if (cur_token
.code
== ':')
7252 if (!(reg
->reg_type
& (SReg2
| SReg3
)))
7254 as_bad (_("`%s' is not a valid segment register"), reg
->reg_name
);
7257 else if (i
.seg
[i
.mem_operands
])
7258 as_warn (_("Extra segment override ignored"));
7261 if (!intel_parser
.in_offset
)
7262 intel_parser
.is_mem
= 1;
7263 switch (reg
->reg_num
)
7266 i
.seg
[i
.mem_operands
] = &es
;
7269 i
.seg
[i
.mem_operands
] = &cs
;
7272 i
.seg
[i
.mem_operands
] = &ss
;
7275 i
.seg
[i
.mem_operands
] = &ds
;
7278 i
.seg
[i
.mem_operands
] = &fs
;
7281 i
.seg
[i
.mem_operands
] = &gs
;
7287 /* Not a segment register. Check for register scaling. */
7288 else if (cur_token
.code
== '*')
7290 if (!intel_parser
.in_bracket
)
7292 as_bad (_("Register scaling only allowed in memory operands"));
7296 if (reg
->reg_type
& Reg16
) /* Disallow things like [si*1]. */
7297 reg
= i386_regtab
+ REGNAM_AX
+ 4; /* sp is invalid as index */
7298 else if (i
.index_reg
)
7299 reg
= i386_regtab
+ REGNAM_EAX
+ 4; /* esp is invalid as index */
7301 /* What follows must be a valid scale. */
7302 intel_match_token ('*');
7304 i
.types
[this_operand
] |= BaseIndex
;
7306 /* Set the scale after setting the register (otherwise,
7307 i386_scale will complain) */
7308 if (cur_token
.code
== '+' || cur_token
.code
== '-')
7310 char *str
, sign
= cur_token
.code
;
7311 intel_match_token (cur_token
.code
);
7312 if (cur_token
.code
!= T_CONST
)
7314 as_bad (_("Syntax error: Expecting a constant, got `%s'"),
7318 str
= (char *) xmalloc (strlen (cur_token
.str
) + 2);
7319 strcpy (str
+ 1, cur_token
.str
);
7321 if (!i386_scale (str
))
7325 else if (!i386_scale (cur_token
.str
))
7327 intel_match_token (cur_token
.code
);
7330 /* No scaling. If this is a memory operand, the register is either a
7331 base register (first occurrence) or an index register (second
7333 else if (intel_parser
.in_bracket
)
7338 else if (!i
.index_reg
)
7342 as_bad (_("Too many register references in memory operand"));
7346 i
.types
[this_operand
] |= BaseIndex
;
7349 /* It's neither base nor index. */
7350 else if (!intel_parser
.in_offset
&& !intel_parser
.is_mem
)
7352 i
.types
[this_operand
] |= reg
->reg_type
& ~BaseIndex
;
7353 i
.op
[this_operand
].regs
= reg
;
7358 as_bad (_("Invalid use of register"));
7362 /* Since registers are not part of the displacement string (except
7363 when we're parsing offset operands), we may need to remove any
7364 preceding '+' from the displacement string. */
7365 if (*intel_parser
.disp
!= '\0'
7366 && !intel_parser
.in_offset
)
7368 char *s
= intel_parser
.disp
;
7369 s
+= strlen (s
) - 1;
7392 intel_match_token (cur_token
.code
);
7394 if (cur_token
.code
== T_PTR
)
7397 /* It must have been an identifier. */
7398 intel_putback_token ();
7399 cur_token
.code
= T_ID
;
7405 if (!intel_parser
.in_offset
&& intel_parser
.is_mem
<= 0)
7409 /* The identifier represents a memory reference only if it's not
7410 preceded by an offset modifier and if it's not an equate. */
7411 symbolP
= symbol_find(cur_token
.str
);
7412 if (!symbolP
|| S_GET_SEGMENT(symbolP
) != absolute_section
)
7413 intel_parser
.is_mem
= 1;
7421 char *save_str
, sign
= 0;
7423 /* Allow constants that start with `+' or `-'. */
7424 if (cur_token
.code
== '-' || cur_token
.code
== '+')
7426 sign
= cur_token
.code
;
7427 intel_match_token (cur_token
.code
);
7428 if (cur_token
.code
!= T_CONST
)
7430 as_bad (_("Syntax error: Expecting a constant, got `%s'"),
7436 save_str
= (char *) xmalloc (strlen (cur_token
.str
) + 2);
7437 strcpy (save_str
+ !!sign
, cur_token
.str
);
7441 /* Get the next token to check for register scaling. */
7442 intel_match_token (cur_token
.code
);
7444 /* Check if this constant is a scaling factor for an index register. */
7445 if (cur_token
.code
== '*')
7447 if (intel_match_token ('*') && cur_token
.code
== T_REG
)
7449 const reg_entry
*reg
= cur_token
.reg
;
7451 if (!intel_parser
.in_bracket
)
7453 as_bad (_("Register scaling only allowed in memory operands"));
7457 if (reg
->reg_type
& Reg16
) /* Disallow things like [1*si]. */
7458 reg
= i386_regtab
+ REGNAM_AX
+ 4; /* sp is invalid as index */
7459 else if (i
.index_reg
)
7460 reg
= i386_regtab
+ REGNAM_EAX
+ 4; /* esp is invalid as index */
7462 /* The constant is followed by `* reg', so it must be
7465 i
.types
[this_operand
] |= BaseIndex
;
7467 /* Set the scale after setting the register (otherwise,
7468 i386_scale will complain) */
7469 if (!i386_scale (save_str
))
7471 intel_match_token (T_REG
);
7473 /* Since registers are not part of the displacement
7474 string, we may need to remove any preceding '+' from
7475 the displacement string. */
7476 if (*intel_parser
.disp
!= '\0')
7478 char *s
= intel_parser
.disp
;
7479 s
+= strlen (s
) - 1;
7489 /* The constant was not used for register scaling. Since we have
7490 already consumed the token following `*' we now need to put it
7491 back in the stream. */
7492 intel_putback_token ();
7495 /* Add the constant to the displacement string. */
7496 strcat (intel_parser
.disp
, save_str
);
7503 as_bad (_("Unrecognized token '%s'"), cur_token
.str
);
7507 /* Match the given token against cur_token. If they match, read the next
7508 token from the operand string. */
7510 intel_match_token (code
)
7513 if (cur_token
.code
== code
)
7520 as_bad (_("Unexpected token `%s'"), cur_token
.str
);
7525 /* Read a new token from intel_parser.op_string and store it in cur_token. */
7530 const reg_entry
*reg
;
7531 struct intel_token new_token
;
7533 new_token
.code
= T_NIL
;
7534 new_token
.reg
= NULL
;
7535 new_token
.str
= NULL
;
7537 /* Free the memory allocated to the previous token and move
7538 cur_token to prev_token. */
7540 free (prev_token
.str
);
7542 prev_token
= cur_token
;
7544 /* Skip whitespace. */
7545 while (is_space_char (*intel_parser
.op_string
))
7546 intel_parser
.op_string
++;
7548 /* Return an empty token if we find nothing else on the line. */
7549 if (*intel_parser
.op_string
== '\0')
7551 cur_token
= new_token
;
7555 /* The new token cannot be larger than the remainder of the operand
7557 new_token
.str
= (char *) xmalloc (strlen (intel_parser
.op_string
) + 1);
7558 new_token
.str
[0] = '\0';
7560 if (strchr ("0123456789", *intel_parser
.op_string
))
7562 char *p
= new_token
.str
;
7563 char *q
= intel_parser
.op_string
;
7564 new_token
.code
= T_CONST
;
7566 /* Allow any kind of identifier char to encompass floating point and
7567 hexadecimal numbers. */
7568 while (is_identifier_char (*q
))
7572 /* Recognize special symbol names [0-9][bf]. */
7573 if (strlen (intel_parser
.op_string
) == 2
7574 && (intel_parser
.op_string
[1] == 'b'
7575 || intel_parser
.op_string
[1] == 'f'))
7576 new_token
.code
= T_ID
;
7579 else if ((reg
= parse_register (intel_parser
.op_string
, &end_op
)) != NULL
)
7581 size_t len
= end_op
- intel_parser
.op_string
;
7583 new_token
.code
= T_REG
;
7584 new_token
.reg
= reg
;
7586 memcpy (new_token
.str
, intel_parser
.op_string
, len
);
7587 new_token
.str
[len
] = '\0';
7590 else if (is_identifier_char (*intel_parser
.op_string
))
7592 char *p
= new_token
.str
;
7593 char *q
= intel_parser
.op_string
;
7595 /* A '.' or '$' followed by an identifier char is an identifier.
7596 Otherwise, it's operator '.' followed by an expression. */
7597 if ((*q
== '.' || *q
== '$') && !is_identifier_char (*(q
+ 1)))
7599 new_token
.code
= '.';
7600 new_token
.str
[0] = '.';
7601 new_token
.str
[1] = '\0';
7605 while (is_identifier_char (*q
) || *q
== '@')
7609 if (strcasecmp (new_token
.str
, "NOT") == 0)
7610 new_token
.code
= '~';
7612 else if (strcasecmp (new_token
.str
, "MOD") == 0)
7613 new_token
.code
= '%';
7615 else if (strcasecmp (new_token
.str
, "AND") == 0)
7616 new_token
.code
= '&';
7618 else if (strcasecmp (new_token
.str
, "OR") == 0)
7619 new_token
.code
= '|';
7621 else if (strcasecmp (new_token
.str
, "XOR") == 0)
7622 new_token
.code
= '^';
7624 else if (strcasecmp (new_token
.str
, "SHL") == 0)
7625 new_token
.code
= T_SHL
;
7627 else if (strcasecmp (new_token
.str
, "SHR") == 0)
7628 new_token
.code
= T_SHR
;
7630 else if (strcasecmp (new_token
.str
, "BYTE") == 0)
7631 new_token
.code
= T_BYTE
;
7633 else if (strcasecmp (new_token
.str
, "WORD") == 0)
7634 new_token
.code
= T_WORD
;
7636 else if (strcasecmp (new_token
.str
, "DWORD") == 0)
7637 new_token
.code
= T_DWORD
;
7639 else if (strcasecmp (new_token
.str
, "FWORD") == 0)
7640 new_token
.code
= T_FWORD
;
7642 else if (strcasecmp (new_token
.str
, "QWORD") == 0)
7643 new_token
.code
= T_QWORD
;
7645 else if (strcasecmp (new_token
.str
, "TBYTE") == 0
7646 /* XXX remove (gcc still uses it) */
7647 || strcasecmp (new_token
.str
, "XWORD") == 0)
7648 new_token
.code
= T_TBYTE
;
7650 else if (strcasecmp (new_token
.str
, "XMMWORD") == 0
7651 || strcasecmp (new_token
.str
, "OWORD") == 0)
7652 new_token
.code
= T_XMMWORD
;
7654 else if (strcasecmp (new_token
.str
, "PTR") == 0)
7655 new_token
.code
= T_PTR
;
7657 else if (strcasecmp (new_token
.str
, "SHORT") == 0)
7658 new_token
.code
= T_SHORT
;
7660 else if (strcasecmp (new_token
.str
, "OFFSET") == 0)
7662 new_token
.code
= T_OFFSET
;
7664 /* ??? This is not mentioned in the MASM grammar but gcc
7665 makes use of it with -mintel-syntax. OFFSET may be
7666 followed by FLAT: */
7667 if (strncasecmp (q
, " FLAT:", 6) == 0)
7668 strcat (new_token
.str
, " FLAT:");
7671 /* ??? This is not mentioned in the MASM grammar. */
7672 else if (strcasecmp (new_token
.str
, "FLAT") == 0)
7674 new_token
.code
= T_OFFSET
;
7676 strcat (new_token
.str
, ":");
7678 as_bad (_("`:' expected"));
7682 new_token
.code
= T_ID
;
7686 else if (strchr ("+-/*%|&^:[]()~", *intel_parser
.op_string
))
7688 new_token
.code
= *intel_parser
.op_string
;
7689 new_token
.str
[0] = *intel_parser
.op_string
;
7690 new_token
.str
[1] = '\0';
7693 else if (strchr ("<>", *intel_parser
.op_string
)
7694 && *intel_parser
.op_string
== *(intel_parser
.op_string
+ 1))
7696 new_token
.code
= *intel_parser
.op_string
== '<' ? T_SHL
: T_SHR
;
7697 new_token
.str
[0] = *intel_parser
.op_string
;
7698 new_token
.str
[1] = *intel_parser
.op_string
;
7699 new_token
.str
[2] = '\0';
7703 as_bad (_("Unrecognized token `%s'"), intel_parser
.op_string
);
7705 intel_parser
.op_string
+= strlen (new_token
.str
);
7706 cur_token
= new_token
;
7709 /* Put cur_token back into the token stream and make cur_token point to
7712 intel_putback_token ()
7714 if (cur_token
.code
!= T_NIL
)
7716 intel_parser
.op_string
-= strlen (cur_token
.str
);
7717 free (cur_token
.str
);
7719 cur_token
= prev_token
;
7721 /* Forget prev_token. */
7722 prev_token
.code
= T_NIL
;
7723 prev_token
.reg
= NULL
;
7724 prev_token
.str
= NULL
;
7728 tc_x86_regname_to_dw2regnum (char *regname
)
7730 unsigned int regnum
;
7731 unsigned int regnames_count
;
7732 static const char *const regnames_32
[] =
7734 "eax", "ecx", "edx", "ebx",
7735 "esp", "ebp", "esi", "edi",
7736 "eip", "eflags", NULL
,
7737 "st0", "st1", "st2", "st3",
7738 "st4", "st5", "st6", "st7",
7740 "xmm0", "xmm1", "xmm2", "xmm3",
7741 "xmm4", "xmm5", "xmm6", "xmm7",
7742 "mm0", "mm1", "mm2", "mm3",
7743 "mm4", "mm5", "mm6", "mm7",
7744 "fcw", "fsw", "mxcsr",
7745 "es", "cs", "ss", "ds", "fs", "gs", NULL
, NULL
,
7748 static const char *const regnames_64
[] =
7750 "rax", "rdx", "rcx", "rbx",
7751 "rsi", "rdi", "rbp", "rsp",
7752 "r8", "r9", "r10", "r11",
7753 "r12", "r13", "r14", "r15",
7755 "xmm0", "xmm1", "xmm2", "xmm3",
7756 "xmm4", "xmm5", "xmm6", "xmm7",
7757 "xmm8", "xmm9", "xmm10", "xmm11",
7758 "xmm12", "xmm13", "xmm14", "xmm15",
7759 "st0", "st1", "st2", "st3",
7760 "st4", "st5", "st6", "st7",
7761 "mm0", "mm1", "mm2", "mm3",
7762 "mm4", "mm5", "mm6", "mm7",
7764 "es", "cs", "ss", "ds", "fs", "gs", NULL
, NULL
,
7765 "fs.base", "gs.base", NULL
, NULL
,
7767 "mxcsr", "fcw", "fsw"
7769 const char *const *regnames
;
7771 if (flag_code
== CODE_64BIT
)
7773 regnames
= regnames_64
;
7774 regnames_count
= ARRAY_SIZE (regnames_64
);
7778 regnames
= regnames_32
;
7779 regnames_count
= ARRAY_SIZE (regnames_32
);
7782 for (regnum
= 0; regnum
< regnames_count
; regnum
++)
7783 if (regnames
[regnum
] != NULL
7784 && strcmp (regname
, regnames
[regnum
]) == 0)
7791 tc_x86_frame_initial_instructions (void)
7793 static unsigned int sp_regno
;
7796 sp_regno
= tc_x86_regname_to_dw2regnum (flag_code
== CODE_64BIT
7799 cfi_add_CFA_def_cfa (sp_regno
, -x86_cie_data_alignment
);
7800 cfi_add_CFA_offset (x86_dwarf2_return_column
, x86_cie_data_alignment
);
7804 i386_elf_section_type (const char *str
, size_t len
)
7806 if (flag_code
== CODE_64BIT
7807 && len
== sizeof ("unwind") - 1
7808 && strncmp (str
, "unwind", 6) == 0)
7809 return SHT_X86_64_UNWIND
;
7816 tc_pe_dwarf2_emit_offset (symbolS
*symbol
, unsigned int size
)
7820 expr
.X_op
= O_secrel
;
7821 expr
.X_add_symbol
= symbol
;
7822 expr
.X_add_number
= 0;
7823 emit_expr (&expr
, size
);
7827 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
7828 /* For ELF on x86-64, add support for SHF_X86_64_LARGE. */
7831 x86_64_section_letter (int letter
, char **ptr_msg
)
7833 if (flag_code
== CODE_64BIT
)
7836 return SHF_X86_64_LARGE
;
7838 *ptr_msg
= _("Bad .section directive: want a,l,w,x,M,S,G,T in string");
7841 *ptr_msg
= _("Bad .section directive: want a,w,x,M,S,G,T in string");
7846 x86_64_section_word (char *str
, size_t len
)
7848 if (len
== 5 && flag_code
== CODE_64BIT
&& CONST_STRNEQ (str
, "large"))
7849 return SHF_X86_64_LARGE
;
7855 handle_large_common (int small ATTRIBUTE_UNUSED
)
7857 if (flag_code
!= CODE_64BIT
)
7859 s_comm_internal (0, elf_common_parse
);
7860 as_warn (_(".largecomm supported only in 64bit mode, producing .comm"));
7864 static segT lbss_section
;
7865 asection
*saved_com_section_ptr
= elf_com_section_ptr
;
7866 asection
*saved_bss_section
= bss_section
;
7868 if (lbss_section
== NULL
)
7870 flagword applicable
;
7872 subsegT subseg
= now_subseg
;
7874 /* The .lbss section is for local .largecomm symbols. */
7875 lbss_section
= subseg_new (".lbss", 0);
7876 applicable
= bfd_applicable_section_flags (stdoutput
);
7877 bfd_set_section_flags (stdoutput
, lbss_section
,
7878 applicable
& SEC_ALLOC
);
7879 seg_info (lbss_section
)->bss
= 1;
7881 subseg_set (seg
, subseg
);
7884 elf_com_section_ptr
= &_bfd_elf_large_com_section
;
7885 bss_section
= lbss_section
;
7887 s_comm_internal (0, elf_common_parse
);
7889 elf_com_section_ptr
= saved_com_section_ptr
;
7890 bss_section
= saved_bss_section
;
7893 #endif /* OBJ_ELF || OBJ_MAYBE_ELF */