1 /* 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: 2 displacements & 2 immediate max. */
276 static expressionS disp_expressions
[2], im_expressions
[2];
278 /* Current operand we are working on. */
279 static int this_operand
;
281 /* We support four different modes. FLAG_CODE variable is used to distinguish
288 #define NUM_FLAG_CODE ((int) CODE_64BIT + 1)
290 static enum flag_code flag_code
;
291 static unsigned int object_64bit
;
292 static int use_rela_relocations
= 0;
294 /* The names used to print error messages. */
295 static const char *flag_code_names
[] =
302 /* 1 for intel syntax,
304 static int intel_syntax
= 0;
306 /* 1 if register prefix % not required. */
307 static int allow_naked_reg
= 0;
309 /* Used in 16 bit gcc mode to add an l suffix to call, ret, enter,
310 leave, push, and pop instructions so that gcc has the same stack
311 frame as in 32 bit mode. */
312 static char stackop_size
= '\0';
314 /* Non-zero to optimize code alignment. */
315 int optimize_align_code
= 1;
317 /* Non-zero to quieten some warnings. */
318 static int quiet_warnings
= 0;
321 static const char *cpu_arch_name
= NULL
;
322 static const char *cpu_sub_arch_name
= NULL
;
324 /* CPU feature flags. */
325 static unsigned int cpu_arch_flags
= CpuUnknownFlags
| CpuNo64
;
327 /* If we have selected a cpu we are generating instructions for. */
328 static int cpu_arch_tune_set
= 0;
330 /* Cpu we are generating instructions for. */
331 static enum processor_type cpu_arch_tune
= PROCESSOR_UNKNOWN
;
333 /* CPU feature flags of cpu we are generating instructions for. */
334 static unsigned int cpu_arch_tune_flags
= 0;
336 /* CPU instruction set architecture used. */
337 static enum processor_type cpu_arch_isa
= PROCESSOR_UNKNOWN
;
339 /* CPU feature flags of instruction set architecture used. */
340 static unsigned int cpu_arch_isa_flags
= 0;
342 /* If set, conditional jumps are not automatically promoted to handle
343 larger than a byte offset. */
344 static unsigned int no_cond_jump_promotion
= 0;
346 /* Pre-defined "_GLOBAL_OFFSET_TABLE_". */
347 static symbolS
*GOT_symbol
;
349 /* The dwarf2 return column, adjusted for 32 or 64 bit. */
350 unsigned int x86_dwarf2_return_column
;
352 /* The dwarf2 data alignment, adjusted for 32 or 64 bit. */
353 int x86_cie_data_alignment
;
355 /* Interface to relax_segment.
356 There are 3 major relax states for 386 jump insns because the
357 different types of jumps add different sizes to frags when we're
358 figuring out what sort of jump to choose to reach a given label. */
361 #define UNCOND_JUMP 0
363 #define COND_JUMP86 2
368 #define SMALL16 (SMALL | CODE16)
370 #define BIG16 (BIG | CODE16)
374 #define INLINE __inline__
380 #define ENCODE_RELAX_STATE(type, size) \
381 ((relax_substateT) (((type) << 2) | (size)))
382 #define TYPE_FROM_RELAX_STATE(s) \
384 #define DISP_SIZE_FROM_RELAX_STATE(s) \
385 ((((s) & 3) == BIG ? 4 : (((s) & 3) == BIG16 ? 2 : 1)))
387 /* This table is used by relax_frag to promote short jumps to long
388 ones where necessary. SMALL (short) jumps may be promoted to BIG
389 (32 bit long) ones, and SMALL16 jumps to BIG16 (16 bit long). We
390 don't allow a short jump in a 32 bit code segment to be promoted to
391 a 16 bit offset jump because it's slower (requires data size
392 prefix), and doesn't work, unless the destination is in the bottom
393 64k of the code segment (The top 16 bits of eip are zeroed). */
395 const relax_typeS md_relax_table
[] =
398 1) most positive reach of this state,
399 2) most negative reach of this state,
400 3) how many bytes this mode will have in the variable part of the frag
401 4) which index into the table to try if we can't fit into this one. */
403 /* UNCOND_JUMP states. */
404 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG
)},
405 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG16
)},
406 /* dword jmp adds 4 bytes to frag:
407 0 extra opcode bytes, 4 displacement bytes. */
409 /* word jmp adds 2 byte2 to frag:
410 0 extra opcode bytes, 2 displacement bytes. */
413 /* COND_JUMP states. */
414 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP
, BIG
)},
415 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP
, BIG16
)},
416 /* dword conditionals adds 5 bytes to frag:
417 1 extra opcode byte, 4 displacement bytes. */
419 /* word conditionals add 3 bytes to frag:
420 1 extra opcode byte, 2 displacement bytes. */
423 /* COND_JUMP86 states. */
424 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP86
, BIG
)},
425 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP86
, BIG16
)},
426 /* dword conditionals adds 5 bytes to frag:
427 1 extra opcode byte, 4 displacement bytes. */
429 /* word conditionals add 4 bytes to frag:
430 1 displacement byte and a 3 byte long branch insn. */
434 static const arch_entry cpu_arch
[] =
436 {"generic32", PROCESSOR_GENERIC32
,
437 Cpu186
|Cpu286
|Cpu386
},
438 {"generic64", PROCESSOR_GENERIC64
,
439 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
440 |CpuMMX2
|CpuSSE
|CpuSSE2
},
441 {"i8086", PROCESSOR_UNKNOWN
,
443 {"i186", PROCESSOR_UNKNOWN
,
445 {"i286", PROCESSOR_UNKNOWN
,
447 {"i386", PROCESSOR_GENERIC32
,
448 Cpu186
|Cpu286
|Cpu386
},
449 {"i486", PROCESSOR_I486
,
450 Cpu186
|Cpu286
|Cpu386
|Cpu486
},
451 {"i586", PROCESSOR_PENTIUM
,
452 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
},
453 {"i686", PROCESSOR_PENTIUMPRO
,
454 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
},
455 {"pentium", PROCESSOR_PENTIUM
,
456 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
},
457 {"pentiumpro",PROCESSOR_PENTIUMPRO
,
458 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
},
459 {"pentiumii", PROCESSOR_PENTIUMPRO
,
460 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuMMX
},
461 {"pentiumiii",PROCESSOR_PENTIUMPRO
,
462 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuMMX
|CpuMMX2
|CpuSSE
},
463 {"pentium4", PROCESSOR_PENTIUM4
,
464 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
465 |CpuMMX2
|CpuSSE
|CpuSSE2
},
466 {"prescott", PROCESSOR_NOCONA
,
467 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
468 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
},
469 {"nocona", PROCESSOR_NOCONA
,
470 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
471 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
},
472 {"yonah", PROCESSOR_CORE
,
473 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
474 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
},
475 {"core", PROCESSOR_CORE
,
476 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
477 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
},
478 {"merom", PROCESSOR_CORE2
,
479 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
480 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
|CpuSSSE3
},
481 {"core2", PROCESSOR_CORE2
,
482 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuP4
|CpuMMX
483 |CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
|CpuSSSE3
},
485 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|CpuK6
|CpuMMX
},
486 {"k6_2", PROCESSOR_K6
,
487 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|CpuK6
|CpuMMX
|Cpu3dnow
},
488 {"athlon", PROCESSOR_ATHLON
,
489 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuK6
490 |CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
},
491 {"sledgehammer", PROCESSOR_K8
,
492 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuK6
493 |CpuSledgehammer
|CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
|CpuSSE
|CpuSSE2
},
494 {"opteron", PROCESSOR_K8
,
495 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuK6
496 |CpuSledgehammer
|CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
|CpuSSE
|CpuSSE2
},
498 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuK6
499 |CpuSledgehammer
|CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
|CpuSSE
|CpuSSE2
},
500 {"amdfam10", PROCESSOR_AMDFAM10
,
501 Cpu186
|Cpu286
|Cpu386
|Cpu486
|Cpu586
|Cpu686
|CpuK6
|CpuSledgehammer
502 |CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
|CpuSSE
|CpuSSE2
|CpuSSE3
|CpuSSE4a
504 {".mmx", PROCESSOR_UNKNOWN
,
506 {".sse", PROCESSOR_UNKNOWN
,
507 CpuMMX
|CpuMMX2
|CpuSSE
},
508 {".sse2", PROCESSOR_UNKNOWN
,
509 CpuMMX
|CpuMMX2
|CpuSSE
|CpuSSE2
},
510 {".sse3", PROCESSOR_UNKNOWN
,
511 CpuMMX
|CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
},
512 {".ssse3", PROCESSOR_UNKNOWN
,
513 CpuMMX
|CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
|CpuSSSE3
},
514 {".3dnow", PROCESSOR_UNKNOWN
,
516 {".3dnowa", PROCESSOR_UNKNOWN
,
517 CpuMMX
|CpuMMX2
|Cpu3dnow
|Cpu3dnowA
},
518 {".padlock", PROCESSOR_UNKNOWN
,
520 {".pacifica", PROCESSOR_UNKNOWN
,
522 {".svme", PROCESSOR_UNKNOWN
,
524 {".sse4a", PROCESSOR_UNKNOWN
,
525 CpuMMX
|CpuMMX2
|CpuSSE
|CpuSSE2
|CpuSSE3
|CpuSSE4a
},
526 {".abm", PROCESSOR_UNKNOWN
,
530 const pseudo_typeS md_pseudo_table
[] =
532 #if !defined(OBJ_AOUT) && !defined(USE_ALIGN_PTWO)
533 {"align", s_align_bytes
, 0},
535 {"align", s_align_ptwo
, 0},
537 {"arch", set_cpu_arch
, 0},
541 {"ffloat", float_cons
, 'f'},
542 {"dfloat", float_cons
, 'd'},
543 {"tfloat", float_cons
, 'x'},
545 {"slong", signed_cons
, 4},
546 {"noopt", s_ignore
, 0},
547 {"optim", s_ignore
, 0},
548 {"code16gcc", set_16bit_gcc_code_flag
, CODE_16BIT
},
549 {"code16", set_code_flag
, CODE_16BIT
},
550 {"code32", set_code_flag
, CODE_32BIT
},
551 {"code64", set_code_flag
, CODE_64BIT
},
552 {"intel_syntax", set_intel_syntax
, 1},
553 {"att_syntax", set_intel_syntax
, 0},
554 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
555 {"largecomm", handle_large_common
, 0},
557 {"file", (void (*) PARAMS ((int))) dwarf2_directive_file
, 0},
558 {"loc", dwarf2_directive_loc
, 0},
559 {"loc_mark_labels", dwarf2_directive_loc_mark_labels
, 0},
562 {"secrel32", pe_directive_secrel
, 0},
567 /* For interface with expression (). */
568 extern char *input_line_pointer
;
570 /* Hash table for instruction mnemonic lookup. */
571 static struct hash_control
*op_hash
;
573 /* Hash table for register lookup. */
574 static struct hash_control
*reg_hash
;
577 i386_align_code (fragP
, count
)
581 /* Various efficient no-op patterns for aligning code labels.
582 Note: Don't try to assemble the instructions in the comments.
583 0L and 0w are not legal. */
584 static const char f32_1
[] =
586 static const char f32_2
[] =
587 {0x66,0x90}; /* xchg %ax,%ax */
588 static const char f32_3
[] =
589 {0x8d,0x76,0x00}; /* leal 0(%esi),%esi */
590 static const char f32_4
[] =
591 {0x8d,0x74,0x26,0x00}; /* leal 0(%esi,1),%esi */
592 static const char f32_5
[] =
594 0x8d,0x74,0x26,0x00}; /* leal 0(%esi,1),%esi */
595 static const char f32_6
[] =
596 {0x8d,0xb6,0x00,0x00,0x00,0x00}; /* leal 0L(%esi),%esi */
597 static const char f32_7
[] =
598 {0x8d,0xb4,0x26,0x00,0x00,0x00,0x00}; /* leal 0L(%esi,1),%esi */
599 static const char f32_8
[] =
601 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00}; /* leal 0L(%esi,1),%esi */
602 static const char f32_9
[] =
603 {0x89,0xf6, /* movl %esi,%esi */
604 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
605 static const char f32_10
[] =
606 {0x8d,0x76,0x00, /* leal 0(%esi),%esi */
607 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
608 static const char f32_11
[] =
609 {0x8d,0x74,0x26,0x00, /* leal 0(%esi,1),%esi */
610 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
611 static const char f32_12
[] =
612 {0x8d,0xb6,0x00,0x00,0x00,0x00, /* leal 0L(%esi),%esi */
613 0x8d,0xbf,0x00,0x00,0x00,0x00}; /* leal 0L(%edi),%edi */
614 static const char f32_13
[] =
615 {0x8d,0xb6,0x00,0x00,0x00,0x00, /* leal 0L(%esi),%esi */
616 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
617 static const char f32_14
[] =
618 {0x8d,0xb4,0x26,0x00,0x00,0x00,0x00, /* leal 0L(%esi,1),%esi */
619 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
620 static const char f32_15
[] =
621 {0xeb,0x0d,0x90,0x90,0x90,0x90,0x90, /* jmp .+15; lotsa nops */
622 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90};
623 static const char f16_3
[] =
624 {0x8d,0x74,0x00}; /* lea 0(%esi),%esi */
625 static const char f16_4
[] =
626 {0x8d,0xb4,0x00,0x00}; /* lea 0w(%si),%si */
627 static const char f16_5
[] =
629 0x8d,0xb4,0x00,0x00}; /* lea 0w(%si),%si */
630 static const char f16_6
[] =
631 {0x89,0xf6, /* mov %si,%si */
632 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
633 static const char f16_7
[] =
634 {0x8d,0x74,0x00, /* lea 0(%si),%si */
635 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
636 static const char f16_8
[] =
637 {0x8d,0xb4,0x00,0x00, /* lea 0w(%si),%si */
638 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
639 static const char *const f32_patt
[] = {
640 f32_1
, f32_2
, f32_3
, f32_4
, f32_5
, f32_6
, f32_7
, f32_8
,
641 f32_9
, f32_10
, f32_11
, f32_12
, f32_13
, f32_14
, f32_15
643 static const char *const f16_patt
[] = {
644 f32_1
, f32_2
, f16_3
, f16_4
, f16_5
, f16_6
, f16_7
, f16_8
,
645 f32_15
, f32_15
, f32_15
, f32_15
, f32_15
, f32_15
, f32_15
648 static const char alt_3
[] =
650 /* nopl 0(%[re]ax) */
651 static const char alt_4
[] =
652 {0x0f,0x1f,0x40,0x00};
653 /* nopl 0(%[re]ax,%[re]ax,1) */
654 static const char alt_5
[] =
655 {0x0f,0x1f,0x44,0x00,0x00};
656 /* nopw 0(%[re]ax,%[re]ax,1) */
657 static const char alt_6
[] =
658 {0x66,0x0f,0x1f,0x44,0x00,0x00};
659 /* nopl 0L(%[re]ax) */
660 static const char alt_7
[] =
661 {0x0f,0x1f,0x80,0x00,0x00,0x00,0x00};
662 /* nopl 0L(%[re]ax,%[re]ax,1) */
663 static const char alt_8
[] =
664 {0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
665 /* nopw 0L(%[re]ax,%[re]ax,1) */
666 static const char alt_9
[] =
667 {0x66,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
668 /* nopw %cs:0L(%[re]ax,%[re]ax,1) */
669 static const char alt_10
[] =
670 {0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
672 nopw %cs:0L(%[re]ax,%[re]ax,1) */
673 static const char alt_long_11
[] =
675 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
678 nopw %cs:0L(%[re]ax,%[re]ax,1) */
679 static const char alt_long_12
[] =
682 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
686 nopw %cs:0L(%[re]ax,%[re]ax,1) */
687 static const char alt_long_13
[] =
691 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
696 nopw %cs:0L(%[re]ax,%[re]ax,1) */
697 static const char alt_long_14
[] =
702 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
708 nopw %cs:0L(%[re]ax,%[re]ax,1) */
709 static const char alt_long_15
[] =
715 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
716 /* nopl 0(%[re]ax,%[re]ax,1)
717 nopw 0(%[re]ax,%[re]ax,1) */
718 static const char alt_short_11
[] =
719 {0x0f,0x1f,0x44,0x00,0x00,
720 0x66,0x0f,0x1f,0x44,0x00,0x00};
721 /* nopw 0(%[re]ax,%[re]ax,1)
722 nopw 0(%[re]ax,%[re]ax,1) */
723 static const char alt_short_12
[] =
724 {0x66,0x0f,0x1f,0x44,0x00,0x00,
725 0x66,0x0f,0x1f,0x44,0x00,0x00};
726 /* nopw 0(%[re]ax,%[re]ax,1)
728 static const char alt_short_13
[] =
729 {0x66,0x0f,0x1f,0x44,0x00,0x00,
730 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00};
733 static const char alt_short_14
[] =
734 {0x0f,0x1f,0x80,0x00,0x00,0x00,0x00,
735 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00};
737 nopl 0L(%[re]ax,%[re]ax,1) */
738 static const char alt_short_15
[] =
739 {0x0f,0x1f,0x80,0x00,0x00,0x00,0x00,
740 0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
741 static const char *const alt_short_patt
[] = {
742 f32_1
, f32_2
, alt_3
, alt_4
, alt_5
, alt_6
, alt_7
, alt_8
,
743 alt_9
, alt_10
, alt_short_11
, alt_short_12
, alt_short_13
,
744 alt_short_14
, alt_short_15
746 static const char *const alt_long_patt
[] = {
747 f32_1
, f32_2
, alt_3
, alt_4
, alt_5
, alt_6
, alt_7
, alt_8
,
748 alt_9
, alt_10
, alt_long_11
, alt_long_12
, alt_long_13
,
749 alt_long_14
, alt_long_15
752 if (count
<= 0 || count
> 15)
755 /* We need to decide which NOP sequence to use for 32bit and
756 64bit. When -mtune= is used:
758 1. For PROCESSOR_I486, PROCESSOR_PENTIUM and PROCESSOR_GENERIC32,
759 f32_patt will be used.
760 2. For PROCESSOR_K8 and PROCESSOR_AMDFAM10 in 64bit, NOPs with 0x66 prefix will be used.
761 3. For PROCESSOR_CORE2, alt_long_patt will be used.
762 4. For PROCESSOR_PENTIUMPRO, PROCESSOR_PENTIUM4, PROCESSOR_NOCONA,
763 PROCESSOR_CORE, PROCESSOR_CORE2, PROCESSOR_K6, PROCESSOR_ATHLON
764 and PROCESSOR_GENERIC64, alt_short_patt will be used.
766 When -mtune= isn't used, alt_short_patt will be used if
767 cpu_arch_isa_flags has Cpu686. Otherwise, f32_patt will be used.
769 When -march= or .arch is used, we can't use anything beyond
770 cpu_arch_isa_flags. */
772 if (flag_code
== CODE_16BIT
)
774 memcpy (fragP
->fr_literal
+ fragP
->fr_fix
,
775 f16_patt
[count
- 1], count
);
777 /* Adjust jump offset. */
778 fragP
->fr_literal
[fragP
->fr_fix
+ 1] = count
- 2;
780 else if (flag_code
== CODE_64BIT
&& cpu_arch_tune
== PROCESSOR_K8
)
783 int nnops
= (count
+ 3) / 4;
784 int len
= count
/ nnops
;
785 int remains
= count
- nnops
* len
;
788 /* The recommended way to pad 64bit code is to use NOPs preceded
789 by maximally four 0x66 prefixes. Balance the size of nops. */
790 for (i
= 0; i
< remains
; i
++)
792 memset (fragP
->fr_literal
+ fragP
->fr_fix
+ pos
, 0x66, len
);
793 fragP
->fr_literal
[fragP
->fr_fix
+ pos
+ len
] = 0x90;
796 for (; i
< nnops
; i
++)
798 memset (fragP
->fr_literal
+ fragP
->fr_fix
+ pos
, 0x66, len
- 1);
799 fragP
->fr_literal
[fragP
->fr_fix
+ pos
+ len
- 1] = 0x90;
805 const char *const *patt
= NULL
;
807 if (cpu_arch_isa
== PROCESSOR_UNKNOWN
)
809 /* PROCESSOR_UNKNOWN means that all ISAs may be used. */
810 switch (cpu_arch_tune
)
812 case PROCESSOR_UNKNOWN
:
813 /* We use cpu_arch_isa_flags to check if we SHOULD
814 optimize for Cpu686. */
815 if ((cpu_arch_isa_flags
& Cpu686
) != 0)
816 patt
= alt_short_patt
;
820 case PROCESSOR_CORE2
:
821 patt
= alt_long_patt
;
823 case PROCESSOR_PENTIUMPRO
:
824 case PROCESSOR_PENTIUM4
:
825 case PROCESSOR_NOCONA
:
828 case PROCESSOR_ATHLON
:
830 case PROCESSOR_GENERIC64
:
831 case PROCESSOR_AMDFAM10
:
832 patt
= alt_short_patt
;
835 case PROCESSOR_PENTIUM
:
836 case PROCESSOR_GENERIC32
:
843 switch (cpu_arch_tune
)
845 case PROCESSOR_UNKNOWN
:
846 /* When cpu_arch_isa is net, cpu_arch_tune shouldn't be
847 PROCESSOR_UNKNOWN. */
852 case PROCESSOR_PENTIUM
:
853 case PROCESSOR_PENTIUMPRO
:
854 case PROCESSOR_PENTIUM4
:
855 case PROCESSOR_NOCONA
:
858 case PROCESSOR_ATHLON
:
860 case PROCESSOR_AMDFAM10
:
861 case PROCESSOR_GENERIC32
:
862 /* We use cpu_arch_isa_flags to check if we CAN optimize
864 if ((cpu_arch_isa_flags
& Cpu686
) != 0)
865 patt
= alt_short_patt
;
869 case PROCESSOR_CORE2
:
870 if ((cpu_arch_isa_flags
& Cpu686
) != 0)
871 patt
= alt_long_patt
;
875 case PROCESSOR_GENERIC64
:
876 patt
= alt_short_patt
;
881 memcpy (fragP
->fr_literal
+ fragP
->fr_fix
,
882 patt
[count
- 1], count
);
884 fragP
->fr_var
= count
;
887 static INLINE
unsigned int
888 mode_from_disp_size (t
)
891 return (t
& Disp8
) ? 1 : (t
& (Disp16
| Disp32
| Disp32S
)) ? 2 : 0;
895 fits_in_signed_byte (num
)
898 return (num
>= -128) && (num
<= 127);
902 fits_in_unsigned_byte (num
)
905 return (num
& 0xff) == num
;
909 fits_in_unsigned_word (num
)
912 return (num
& 0xffff) == num
;
916 fits_in_signed_word (num
)
919 return (-32768 <= num
) && (num
<= 32767);
922 fits_in_signed_long (num
)
923 offsetT num ATTRIBUTE_UNUSED
;
928 return (!(((offsetT
) -1 << 31) & num
)
929 || (((offsetT
) -1 << 31) & num
) == ((offsetT
) -1 << 31));
931 } /* fits_in_signed_long() */
933 fits_in_unsigned_long (num
)
934 offsetT num ATTRIBUTE_UNUSED
;
939 return (num
& (((offsetT
) 2 << 31) - 1)) == num
;
941 } /* fits_in_unsigned_long() */
944 smallest_imm_type (num
)
947 if (cpu_arch_flags
!= (Cpu186
| Cpu286
| Cpu386
| Cpu486
| CpuNo64
))
949 /* This code is disabled on the 486 because all the Imm1 forms
950 in the opcode table are slower on the i486. They're the
951 versions with the implicitly specified single-position
952 displacement, which has another syntax if you really want to
955 return Imm1
| Imm8
| Imm8S
| Imm16
| Imm32
| Imm32S
| Imm64
;
957 return (fits_in_signed_byte (num
)
958 ? (Imm8S
| Imm8
| Imm16
| Imm32
| Imm32S
| Imm64
)
959 : fits_in_unsigned_byte (num
)
960 ? (Imm8
| Imm16
| Imm32
| Imm32S
| Imm64
)
961 : (fits_in_signed_word (num
) || fits_in_unsigned_word (num
))
962 ? (Imm16
| Imm32
| Imm32S
| Imm64
)
963 : fits_in_signed_long (num
)
964 ? (Imm32
| Imm32S
| Imm64
)
965 : fits_in_unsigned_long (num
)
971 offset_in_range (val
, size
)
979 case 1: mask
= ((addressT
) 1 << 8) - 1; break;
980 case 2: mask
= ((addressT
) 1 << 16) - 1; break;
981 case 4: mask
= ((addressT
) 2 << 31) - 1; break;
983 case 8: mask
= ((addressT
) 2 << 63) - 1; break;
988 /* If BFD64, sign extend val. */
989 if (!use_rela_relocations
)
990 if ((val
& ~(((addressT
) 2 << 31) - 1)) == 0)
991 val
= (val
^ ((addressT
) 1 << 31)) - ((addressT
) 1 << 31);
993 if ((val
& ~mask
) != 0 && (val
& ~mask
) != ~mask
)
995 char buf1
[40], buf2
[40];
997 sprint_value (buf1
, val
);
998 sprint_value (buf2
, val
& mask
);
999 as_warn (_("%s shortened to %s"), buf1
, buf2
);
1004 /* Returns 0 if attempting to add a prefix where one from the same
1005 class already exists, 1 if non rep/repne added, 2 if rep/repne
1009 unsigned int prefix
;
1014 if (prefix
>= REX_OPCODE
&& prefix
< REX_OPCODE
+ 16
1015 && flag_code
== CODE_64BIT
)
1017 if ((i
.prefix
[REX_PREFIX
] & prefix
& REX_MODE64
)
1018 || ((i
.prefix
[REX_PREFIX
] & (REX_EXTX
| REX_EXTY
| REX_EXTZ
))
1019 && (prefix
& (REX_EXTX
| REX_EXTY
| REX_EXTZ
))))
1030 case CS_PREFIX_OPCODE
:
1031 case DS_PREFIX_OPCODE
:
1032 case ES_PREFIX_OPCODE
:
1033 case FS_PREFIX_OPCODE
:
1034 case GS_PREFIX_OPCODE
:
1035 case SS_PREFIX_OPCODE
:
1039 case REPNE_PREFIX_OPCODE
:
1040 case REPE_PREFIX_OPCODE
:
1043 case LOCK_PREFIX_OPCODE
:
1051 case ADDR_PREFIX_OPCODE
:
1055 case DATA_PREFIX_OPCODE
:
1059 if (i
.prefix
[q
] != 0)
1067 i
.prefix
[q
] |= prefix
;
1070 as_bad (_("same type of prefix used twice"));
1076 set_code_flag (value
)
1080 cpu_arch_flags
&= ~(Cpu64
| CpuNo64
);
1081 cpu_arch_flags
|= (flag_code
== CODE_64BIT
? Cpu64
: CpuNo64
);
1082 if (value
== CODE_64BIT
&& !(cpu_arch_flags
& CpuSledgehammer
))
1084 as_bad (_("64bit mode not supported on this CPU."));
1086 if (value
== CODE_32BIT
&& !(cpu_arch_flags
& Cpu386
))
1088 as_bad (_("32bit mode not supported on this CPU."));
1090 stackop_size
= '\0';
1094 set_16bit_gcc_code_flag (new_code_flag
)
1097 flag_code
= new_code_flag
;
1098 cpu_arch_flags
&= ~(Cpu64
| CpuNo64
);
1099 cpu_arch_flags
|= (flag_code
== CODE_64BIT
? Cpu64
: CpuNo64
);
1100 stackop_size
= LONG_MNEM_SUFFIX
;
1104 set_intel_syntax (syntax_flag
)
1107 /* Find out if register prefixing is specified. */
1108 int ask_naked_reg
= 0;
1111 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1113 char *string
= input_line_pointer
;
1114 int e
= get_symbol_end ();
1116 if (strcmp (string
, "prefix") == 0)
1118 else if (strcmp (string
, "noprefix") == 0)
1121 as_bad (_("bad argument to syntax directive."));
1122 *input_line_pointer
= e
;
1124 demand_empty_rest_of_line ();
1126 intel_syntax
= syntax_flag
;
1128 if (ask_naked_reg
== 0)
1129 allow_naked_reg
= (intel_syntax
1130 && (bfd_get_symbol_leading_char (stdoutput
) != '\0'));
1132 allow_naked_reg
= (ask_naked_reg
< 0);
1134 identifier_chars
['%'] = intel_syntax
&& allow_naked_reg
? '%' : 0;
1135 identifier_chars
['$'] = intel_syntax
? '$' : 0;
1139 set_cpu_arch (dummy
)
1140 int dummy ATTRIBUTE_UNUSED
;
1144 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1146 char *string
= input_line_pointer
;
1147 int e
= get_symbol_end ();
1150 for (i
= 0; i
< ARRAY_SIZE (cpu_arch
); i
++)
1152 if (strcmp (string
, cpu_arch
[i
].name
) == 0)
1156 cpu_arch_name
= cpu_arch
[i
].name
;
1157 cpu_sub_arch_name
= NULL
;
1158 cpu_arch_flags
= (cpu_arch
[i
].flags
1159 | (flag_code
== CODE_64BIT
? Cpu64
: CpuNo64
));
1160 cpu_arch_isa
= cpu_arch
[i
].type
;
1161 cpu_arch_isa_flags
= cpu_arch
[i
].flags
;
1162 if (!cpu_arch_tune_set
)
1164 cpu_arch_tune
= cpu_arch_isa
;
1165 cpu_arch_tune_flags
= cpu_arch_isa_flags
;
1169 if ((cpu_arch_flags
| cpu_arch
[i
].flags
) != cpu_arch_flags
)
1171 cpu_sub_arch_name
= cpu_arch
[i
].name
;
1172 cpu_arch_flags
|= cpu_arch
[i
].flags
;
1174 *input_line_pointer
= e
;
1175 demand_empty_rest_of_line ();
1179 if (i
>= ARRAY_SIZE (cpu_arch
))
1180 as_bad (_("no such architecture: `%s'"), string
);
1182 *input_line_pointer
= e
;
1185 as_bad (_("missing cpu architecture"));
1187 no_cond_jump_promotion
= 0;
1188 if (*input_line_pointer
== ','
1189 && !is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1191 char *string
= ++input_line_pointer
;
1192 int e
= get_symbol_end ();
1194 if (strcmp (string
, "nojumps") == 0)
1195 no_cond_jump_promotion
= 1;
1196 else if (strcmp (string
, "jumps") == 0)
1199 as_bad (_("no such architecture modifier: `%s'"), string
);
1201 *input_line_pointer
= e
;
1204 demand_empty_rest_of_line ();
1210 if (!strcmp (default_arch
, "x86_64"))
1211 return bfd_mach_x86_64
;
1212 else if (!strcmp (default_arch
, "i386"))
1213 return bfd_mach_i386_i386
;
1215 as_fatal (_("Unknown architecture"));
1221 const char *hash_err
;
1223 /* Initialize op_hash hash table. */
1224 op_hash
= hash_new ();
1227 const template *optab
;
1228 templates
*core_optab
;
1230 /* Setup for loop. */
1232 core_optab
= (templates
*) xmalloc (sizeof (templates
));
1233 core_optab
->start
= optab
;
1238 if (optab
->name
== NULL
1239 || strcmp (optab
->name
, (optab
- 1)->name
) != 0)
1241 /* different name --> ship out current template list;
1242 add to hash table; & begin anew. */
1243 core_optab
->end
= optab
;
1244 hash_err
= hash_insert (op_hash
,
1249 as_fatal (_("Internal Error: Can't hash %s: %s"),
1253 if (optab
->name
== NULL
)
1255 core_optab
= (templates
*) xmalloc (sizeof (templates
));
1256 core_optab
->start
= optab
;
1261 /* Initialize reg_hash hash table. */
1262 reg_hash
= hash_new ();
1264 const reg_entry
*regtab
;
1266 for (regtab
= i386_regtab
;
1267 regtab
< i386_regtab
+ sizeof (i386_regtab
) / sizeof (i386_regtab
[0]);
1270 hash_err
= hash_insert (reg_hash
, regtab
->reg_name
, (PTR
) regtab
);
1272 as_fatal (_("Internal Error: Can't hash %s: %s"),
1278 /* Fill in lexical tables: mnemonic_chars, operand_chars. */
1283 for (c
= 0; c
< 256; c
++)
1288 mnemonic_chars
[c
] = c
;
1289 register_chars
[c
] = c
;
1290 operand_chars
[c
] = c
;
1292 else if (ISLOWER (c
))
1294 mnemonic_chars
[c
] = c
;
1295 register_chars
[c
] = c
;
1296 operand_chars
[c
] = c
;
1298 else if (ISUPPER (c
))
1300 mnemonic_chars
[c
] = TOLOWER (c
);
1301 register_chars
[c
] = mnemonic_chars
[c
];
1302 operand_chars
[c
] = c
;
1305 if (ISALPHA (c
) || ISDIGIT (c
))
1306 identifier_chars
[c
] = c
;
1309 identifier_chars
[c
] = c
;
1310 operand_chars
[c
] = c
;
1315 identifier_chars
['@'] = '@';
1318 identifier_chars
['?'] = '?';
1319 operand_chars
['?'] = '?';
1321 digit_chars
['-'] = '-';
1322 mnemonic_chars
['-'] = '-';
1323 identifier_chars
['_'] = '_';
1324 identifier_chars
['.'] = '.';
1326 for (p
= operand_special_chars
; *p
!= '\0'; p
++)
1327 operand_chars
[(unsigned char) *p
] = *p
;
1330 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
1333 record_alignment (text_section
, 2);
1334 record_alignment (data_section
, 2);
1335 record_alignment (bss_section
, 2);
1339 if (flag_code
== CODE_64BIT
)
1341 x86_dwarf2_return_column
= 16;
1342 x86_cie_data_alignment
= -8;
1346 x86_dwarf2_return_column
= 8;
1347 x86_cie_data_alignment
= -4;
1352 i386_print_statistics (file
)
1355 hash_print_statistics (file
, "i386 opcode", op_hash
);
1356 hash_print_statistics (file
, "i386 register", reg_hash
);
1361 /* Debugging routines for md_assemble. */
1362 static void pi
PARAMS ((char *, i386_insn
*));
1363 static void pte
PARAMS ((template *));
1364 static void pt
PARAMS ((unsigned int));
1365 static void pe
PARAMS ((expressionS
*));
1366 static void ps
PARAMS ((symbolS
*));
1375 fprintf (stdout
, "%s: template ", line
);
1377 fprintf (stdout
, " address: base %s index %s scale %x\n",
1378 x
->base_reg
? x
->base_reg
->reg_name
: "none",
1379 x
->index_reg
? x
->index_reg
->reg_name
: "none",
1380 x
->log2_scale_factor
);
1381 fprintf (stdout
, " modrm: mode %x reg %x reg/mem %x\n",
1382 x
->rm
.mode
, x
->rm
.reg
, x
->rm
.regmem
);
1383 fprintf (stdout
, " sib: base %x index %x scale %x\n",
1384 x
->sib
.base
, x
->sib
.index
, x
->sib
.scale
);
1385 fprintf (stdout
, " rex: 64bit %x extX %x extY %x extZ %x\n",
1386 (x
->rex
& REX_MODE64
) != 0,
1387 (x
->rex
& REX_EXTX
) != 0,
1388 (x
->rex
& REX_EXTY
) != 0,
1389 (x
->rex
& REX_EXTZ
) != 0);
1390 for (i
= 0; i
< x
->operands
; i
++)
1392 fprintf (stdout
, " #%d: ", i
+ 1);
1394 fprintf (stdout
, "\n");
1396 & (Reg
| SReg2
| SReg3
| Control
| Debug
| Test
| RegMMX
| RegXMM
))
1397 fprintf (stdout
, "%s\n", x
->op
[i
].regs
->reg_name
);
1398 if (x
->types
[i
] & Imm
)
1400 if (x
->types
[i
] & Disp
)
1401 pe (x
->op
[i
].disps
);
1410 fprintf (stdout
, " %d operands ", t
->operands
);
1411 fprintf (stdout
, "opcode %x ", t
->base_opcode
);
1412 if (t
->extension_opcode
!= None
)
1413 fprintf (stdout
, "ext %x ", t
->extension_opcode
);
1414 if (t
->opcode_modifier
& D
)
1415 fprintf (stdout
, "D");
1416 if (t
->opcode_modifier
& W
)
1417 fprintf (stdout
, "W");
1418 fprintf (stdout
, "\n");
1419 for (i
= 0; i
< t
->operands
; i
++)
1421 fprintf (stdout
, " #%d type ", i
+ 1);
1422 pt (t
->operand_types
[i
]);
1423 fprintf (stdout
, "\n");
1431 fprintf (stdout
, " operation %d\n", e
->X_op
);
1432 fprintf (stdout
, " add_number %ld (%lx)\n",
1433 (long) e
->X_add_number
, (long) e
->X_add_number
);
1434 if (e
->X_add_symbol
)
1436 fprintf (stdout
, " add_symbol ");
1437 ps (e
->X_add_symbol
);
1438 fprintf (stdout
, "\n");
1442 fprintf (stdout
, " op_symbol ");
1443 ps (e
->X_op_symbol
);
1444 fprintf (stdout
, "\n");
1452 fprintf (stdout
, "%s type %s%s",
1454 S_IS_EXTERNAL (s
) ? "EXTERNAL " : "",
1455 segment_name (S_GET_SEGMENT (s
)));
1458 static struct type_name
1463 const type_names
[] =
1476 { BaseIndex
, "BaseIndex" },
1480 { Disp32S
, "d32s" },
1482 { InOutPortReg
, "InOutPortReg" },
1483 { ShiftCount
, "ShiftCount" },
1484 { Control
, "control reg" },
1485 { Test
, "test reg" },
1486 { Debug
, "debug reg" },
1487 { FloatReg
, "FReg" },
1488 { FloatAcc
, "FAcc" },
1492 { JumpAbsolute
, "Jump Absolute" },
1503 const struct type_name
*ty
;
1505 for (ty
= type_names
; ty
->mask
; ty
++)
1507 fprintf (stdout
, "%s, ", ty
->tname
);
1511 #endif /* DEBUG386 */
1513 static bfd_reloc_code_real_type
1514 reloc (unsigned int size
,
1517 bfd_reloc_code_real_type other
)
1519 if (other
!= NO_RELOC
)
1521 reloc_howto_type
*reloc
;
1526 case BFD_RELOC_X86_64_GOT32
:
1527 return BFD_RELOC_X86_64_GOT64
;
1529 case BFD_RELOC_X86_64_PLTOFF64
:
1530 return BFD_RELOC_X86_64_PLTOFF64
;
1532 case BFD_RELOC_X86_64_GOTPC32
:
1533 other
= BFD_RELOC_X86_64_GOTPC64
;
1535 case BFD_RELOC_X86_64_GOTPCREL
:
1536 other
= BFD_RELOC_X86_64_GOTPCREL64
;
1538 case BFD_RELOC_X86_64_TPOFF32
:
1539 other
= BFD_RELOC_X86_64_TPOFF64
;
1541 case BFD_RELOC_X86_64_DTPOFF32
:
1542 other
= BFD_RELOC_X86_64_DTPOFF64
;
1548 /* Sign-checking 4-byte relocations in 16-/32-bit code is pointless. */
1549 if (size
== 4 && flag_code
!= CODE_64BIT
)
1552 reloc
= bfd_reloc_type_lookup (stdoutput
, other
);
1554 as_bad (_("unknown relocation (%u)"), other
);
1555 else if (size
!= bfd_get_reloc_size (reloc
))
1556 as_bad (_("%u-byte relocation cannot be applied to %u-byte field"),
1557 bfd_get_reloc_size (reloc
),
1559 else if (pcrel
&& !reloc
->pc_relative
)
1560 as_bad (_("non-pc-relative relocation for pc-relative field"));
1561 else if ((reloc
->complain_on_overflow
== complain_overflow_signed
1563 || (reloc
->complain_on_overflow
== complain_overflow_unsigned
1565 as_bad (_("relocated field and relocation type differ in signedness"));
1574 as_bad (_("there are no unsigned pc-relative relocations"));
1577 case 1: return BFD_RELOC_8_PCREL
;
1578 case 2: return BFD_RELOC_16_PCREL
;
1579 case 4: return BFD_RELOC_32_PCREL
;
1580 case 8: return BFD_RELOC_64_PCREL
;
1582 as_bad (_("cannot do %u byte pc-relative relocation"), size
);
1589 case 4: return BFD_RELOC_X86_64_32S
;
1594 case 1: return BFD_RELOC_8
;
1595 case 2: return BFD_RELOC_16
;
1596 case 4: return BFD_RELOC_32
;
1597 case 8: return BFD_RELOC_64
;
1599 as_bad (_("cannot do %s %u byte relocation"),
1600 sign
> 0 ? "signed" : "unsigned", size
);
1604 return BFD_RELOC_NONE
;
1607 /* Here we decide which fixups can be adjusted to make them relative to
1608 the beginning of the section instead of the symbol. Basically we need
1609 to make sure that the dynamic relocations are done correctly, so in
1610 some cases we force the original symbol to be used. */
1613 tc_i386_fix_adjustable (fixP
)
1614 fixS
*fixP ATTRIBUTE_UNUSED
;
1616 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
1620 /* Don't adjust pc-relative references to merge sections in 64-bit
1622 if (use_rela_relocations
1623 && (S_GET_SEGMENT (fixP
->fx_addsy
)->flags
& SEC_MERGE
) != 0
1627 /* The x86_64 GOTPCREL are represented as 32bit PCrel relocations
1628 and changed later by validate_fix. */
1629 if (GOT_symbol
&& fixP
->fx_subsy
== GOT_symbol
1630 && fixP
->fx_r_type
== BFD_RELOC_32_PCREL
)
1633 /* adjust_reloc_syms doesn't know about the GOT. */
1634 if (fixP
->fx_r_type
== BFD_RELOC_386_GOTOFF
1635 || fixP
->fx_r_type
== BFD_RELOC_386_PLT32
1636 || fixP
->fx_r_type
== BFD_RELOC_386_GOT32
1637 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_GD
1638 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_LDM
1639 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_LDO_32
1640 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_IE_32
1641 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_IE
1642 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_GOTIE
1643 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_LE_32
1644 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_LE
1645 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_GOTDESC
1646 || fixP
->fx_r_type
== BFD_RELOC_386_TLS_DESC_CALL
1647 || fixP
->fx_r_type
== BFD_RELOC_X86_64_PLT32
1648 || fixP
->fx_r_type
== BFD_RELOC_X86_64_GOT32
1649 || fixP
->fx_r_type
== BFD_RELOC_X86_64_GOTPCREL
1650 || fixP
->fx_r_type
== BFD_RELOC_X86_64_TLSGD
1651 || fixP
->fx_r_type
== BFD_RELOC_X86_64_TLSLD
1652 || fixP
->fx_r_type
== BFD_RELOC_X86_64_DTPOFF32
1653 || fixP
->fx_r_type
== BFD_RELOC_X86_64_DTPOFF64
1654 || fixP
->fx_r_type
== BFD_RELOC_X86_64_GOTTPOFF
1655 || fixP
->fx_r_type
== BFD_RELOC_X86_64_TPOFF32
1656 || fixP
->fx_r_type
== BFD_RELOC_X86_64_TPOFF64
1657 || fixP
->fx_r_type
== BFD_RELOC_X86_64_GOTOFF64
1658 || fixP
->fx_r_type
== BFD_RELOC_X86_64_GOTPC32_TLSDESC
1659 || fixP
->fx_r_type
== BFD_RELOC_X86_64_TLSDESC_CALL
1660 || fixP
->fx_r_type
== BFD_RELOC_VTABLE_INHERIT
1661 || fixP
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)
1667 static int intel_float_operand
PARAMS ((const char *mnemonic
));
1670 intel_float_operand (mnemonic
)
1671 const char *mnemonic
;
1673 /* Note that the value returned is meaningful only for opcodes with (memory)
1674 operands, hence the code here is free to improperly handle opcodes that
1675 have no operands (for better performance and smaller code). */
1677 if (mnemonic
[0] != 'f')
1678 return 0; /* non-math */
1680 switch (mnemonic
[1])
1682 /* fclex, fdecstp, fdisi, femms, feni, fincstp, finit, fsetpm, and
1683 the fs segment override prefix not currently handled because no
1684 call path can make opcodes without operands get here */
1686 return 2 /* integer op */;
1688 if (mnemonic
[2] == 'd' && (mnemonic
[3] == 'c' || mnemonic
[3] == 'e'))
1689 return 3; /* fldcw/fldenv */
1692 if (mnemonic
[2] != 'o' /* fnop */)
1693 return 3; /* non-waiting control op */
1696 if (mnemonic
[2] == 's')
1697 return 3; /* frstor/frstpm */
1700 if (mnemonic
[2] == 'a')
1701 return 3; /* fsave */
1702 if (mnemonic
[2] == 't')
1704 switch (mnemonic
[3])
1706 case 'c': /* fstcw */
1707 case 'd': /* fstdw */
1708 case 'e': /* fstenv */
1709 case 's': /* fsts[gw] */
1715 if (mnemonic
[2] == 'r' || mnemonic
[2] == 's')
1716 return 0; /* fxsave/fxrstor are not really math ops */
1723 /* This is the guts of the machine-dependent assembler. LINE points to a
1724 machine dependent instruction. This function is supposed to emit
1725 the frags/bytes it assembles to. */
1732 char mnemonic
[MAX_MNEM_SIZE
];
1734 /* Initialize globals. */
1735 memset (&i
, '\0', sizeof (i
));
1736 for (j
= 0; j
< MAX_OPERANDS
; j
++)
1737 i
.reloc
[j
] = NO_RELOC
;
1738 memset (disp_expressions
, '\0', sizeof (disp_expressions
));
1739 memset (im_expressions
, '\0', sizeof (im_expressions
));
1740 save_stack_p
= save_stack
;
1742 /* First parse an instruction mnemonic & call i386_operand for the operands.
1743 We assume that the scrubber has arranged it so that line[0] is the valid
1744 start of a (possibly prefixed) mnemonic. */
1746 line
= parse_insn (line
, mnemonic
);
1750 line
= parse_operands (line
, mnemonic
);
1754 /* The order of the immediates should be reversed
1755 for 2 immediates extrq and insertq instructions */
1756 if ((i
.imm_operands
== 2) &&
1757 ((strcmp (mnemonic
, "extrq") == 0)
1758 || (strcmp (mnemonic
, "insertq") == 0)))
1760 swap_imm_operands ();
1761 /* "extrq" and insertq" are the only two instructions whose operands
1762 have to be reversed even though they have two immediate operands.
1768 /* Now we've parsed the mnemonic into a set of templates, and have the
1769 operands at hand. */
1771 /* All intel opcodes have reversed operands except for "bound" and
1772 "enter". We also don't reverse intersegment "jmp" and "call"
1773 instructions with 2 immediate operands so that the immediate segment
1774 precedes the offset, as it does when in AT&T mode. */
1775 if (intel_syntax
&& i
.operands
> 1
1776 && (strcmp (mnemonic
, "bound") != 0)
1777 && (strcmp (mnemonic
, "invlpga") != 0)
1778 && !((i
.types
[0] & Imm
) && (i
.types
[1] & Imm
)))
1784 /* Don't optimize displacement for movabs since it only takes 64bit
1787 && (flag_code
!= CODE_64BIT
1788 || strcmp (mnemonic
, "movabs") != 0))
1791 /* Next, we find a template that matches the given insn,
1792 making sure the overlap of the given operands types is consistent
1793 with the template operand types. */
1795 if (!match_template ())
1800 /* Undo SYSV386_COMPAT brokenness when in Intel mode. See i386.h */
1802 && (i
.tm
.base_opcode
& 0xfffffde0) == 0xdce0)
1803 i
.tm
.base_opcode
^= FloatR
;
1805 /* Zap movzx and movsx suffix. The suffix may have been set from
1806 "word ptr" or "byte ptr" on the source operand, but we'll use
1807 the suffix later to choose the destination register. */
1808 if ((i
.tm
.base_opcode
& ~9) == 0x0fb6)
1810 if (i
.reg_operands
< 2
1812 && (~i
.tm
.opcode_modifier
1819 as_bad (_("ambiguous operand size for `%s'"), i
.tm
.name
);
1825 if (i
.tm
.opcode_modifier
& FWait
)
1826 if (!add_prefix (FWAIT_OPCODE
))
1829 /* Check string instruction segment overrides. */
1830 if ((i
.tm
.opcode_modifier
& IsString
) != 0 && i
.mem_operands
!= 0)
1832 if (!check_string ())
1836 if (!process_suffix ())
1839 /* Make still unresolved immediate matches conform to size of immediate
1840 given in i.suffix. */
1841 if (!finalize_imm ())
1844 if (i
.types
[0] & Imm1
)
1845 i
.imm_operands
= 0; /* kludge for shift insns. */
1846 if (i
.types
[0] & ImplicitRegister
)
1848 if (i
.types
[1] & ImplicitRegister
)
1850 if (i
.types
[2] & ImplicitRegister
)
1853 if (i
.tm
.opcode_modifier
& ImmExt
)
1857 if ((i
.tm
.cpu_flags
& CpuSSE3
) && i
.operands
> 0)
1859 /* Streaming SIMD extensions 3 Instructions have the fixed
1860 operands with an opcode suffix which is coded in the same
1861 place as an 8-bit immediate field would be. Here we check
1862 those operands and remove them afterwards. */
1865 for (x
= 0; x
< i
.operands
; x
++)
1866 if (i
.op
[x
].regs
->reg_num
!= x
)
1867 as_bad (_("can't use register '%%%s' as operand %d in '%s'."),
1868 i
.op
[x
].regs
->reg_name
, x
+ 1, i
.tm
.name
);
1872 /* These AMD 3DNow! and Intel Katmai New Instructions have an
1873 opcode suffix which is coded in the same place as an 8-bit
1874 immediate field would be. Here we fake an 8-bit immediate
1875 operand from the opcode suffix stored in tm.extension_opcode. */
1877 assert (i
.imm_operands
== 0 && i
.operands
<= 2 && 2 < MAX_OPERANDS
);
1879 exp
= &im_expressions
[i
.imm_operands
++];
1880 i
.op
[i
.operands
].imms
= exp
;
1881 i
.types
[i
.operands
++] = Imm8
;
1882 exp
->X_op
= O_constant
;
1883 exp
->X_add_number
= i
.tm
.extension_opcode
;
1884 i
.tm
.extension_opcode
= None
;
1887 /* For insns with operands there are more diddles to do to the opcode. */
1890 if (!process_operands ())
1893 else if (!quiet_warnings
&& (i
.tm
.opcode_modifier
& Ugh
) != 0)
1895 /* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc. */
1896 as_warn (_("translating to `%sp'"), i
.tm
.name
);
1899 /* Handle conversion of 'int $3' --> special int3 insn. */
1900 if (i
.tm
.base_opcode
== INT_OPCODE
&& i
.op
[0].imms
->X_add_number
== 3)
1902 i
.tm
.base_opcode
= INT3_OPCODE
;
1906 if ((i
.tm
.opcode_modifier
& (Jump
| JumpByte
| JumpDword
))
1907 && i
.op
[0].disps
->X_op
== O_constant
)
1909 /* Convert "jmp constant" (and "call constant") to a jump (call) to
1910 the absolute address given by the constant. Since ix86 jumps and
1911 calls are pc relative, we need to generate a reloc. */
1912 i
.op
[0].disps
->X_add_symbol
= &abs_symbol
;
1913 i
.op
[0].disps
->X_op
= O_symbol
;
1916 if ((i
.tm
.opcode_modifier
& Rex64
) != 0)
1917 i
.rex
|= REX_MODE64
;
1919 /* For 8 bit registers we need an empty rex prefix. Also if the
1920 instruction already has a prefix, we need to convert old
1921 registers to new ones. */
1923 if (((i
.types
[0] & Reg8
) != 0
1924 && (i
.op
[0].regs
->reg_flags
& RegRex64
) != 0)
1925 || ((i
.types
[1] & Reg8
) != 0
1926 && (i
.op
[1].regs
->reg_flags
& RegRex64
) != 0)
1927 || (((i
.types
[0] & Reg8
) != 0 || (i
.types
[1] & Reg8
) != 0)
1932 i
.rex
|= REX_OPCODE
;
1933 for (x
= 0; x
< 2; x
++)
1935 /* Look for 8 bit operand that uses old registers. */
1936 if ((i
.types
[x
] & Reg8
) != 0
1937 && (i
.op
[x
].regs
->reg_flags
& RegRex64
) == 0)
1939 /* In case it is "hi" register, give up. */
1940 if (i
.op
[x
].regs
->reg_num
> 3)
1941 as_bad (_("can't encode register '%%%s' in an instruction requiring REX prefix."),
1942 i
.op
[x
].regs
->reg_name
);
1944 /* Otherwise it is equivalent to the extended register.
1945 Since the encoding doesn't change this is merely
1946 cosmetic cleanup for debug output. */
1948 i
.op
[x
].regs
= i
.op
[x
].regs
+ 8;
1954 add_prefix (REX_OPCODE
| i
.rex
);
1956 /* We are ready to output the insn. */
1961 parse_insn (line
, mnemonic
)
1966 char *token_start
= l
;
1971 /* Non-zero if we found a prefix only acceptable with string insns. */
1972 const char *expecting_string_instruction
= NULL
;
1977 while ((*mnem_p
= mnemonic_chars
[(unsigned char) *l
]) != 0)
1980 if (mnem_p
>= mnemonic
+ MAX_MNEM_SIZE
)
1982 as_bad (_("no such instruction: `%s'"), token_start
);
1987 if (!is_space_char (*l
)
1988 && *l
!= END_OF_INSN
1990 || (*l
!= PREFIX_SEPARATOR
1993 as_bad (_("invalid character %s in mnemonic"),
1994 output_invalid (*l
));
1997 if (token_start
== l
)
1999 if (!intel_syntax
&& *l
== PREFIX_SEPARATOR
)
2000 as_bad (_("expecting prefix; got nothing"));
2002 as_bad (_("expecting mnemonic; got nothing"));
2006 /* Look up instruction (or prefix) via hash table. */
2007 current_templates
= hash_find (op_hash
, mnemonic
);
2009 if (*l
!= END_OF_INSN
2010 && (!is_space_char (*l
) || l
[1] != END_OF_INSN
)
2011 && current_templates
2012 && (current_templates
->start
->opcode_modifier
& IsPrefix
))
2014 if (current_templates
->start
->cpu_flags
2015 & (flag_code
!= CODE_64BIT
? Cpu64
: CpuNo64
))
2017 as_bad ((flag_code
!= CODE_64BIT
2018 ? _("`%s' is only supported in 64-bit mode")
2019 : _("`%s' is not supported in 64-bit mode")),
2020 current_templates
->start
->name
);
2023 /* If we are in 16-bit mode, do not allow addr16 or data16.
2024 Similarly, in 32-bit mode, do not allow addr32 or data32. */
2025 if ((current_templates
->start
->opcode_modifier
& (Size16
| Size32
))
2026 && flag_code
!= CODE_64BIT
2027 && (((current_templates
->start
->opcode_modifier
& Size32
) != 0)
2028 ^ (flag_code
== CODE_16BIT
)))
2030 as_bad (_("redundant %s prefix"),
2031 current_templates
->start
->name
);
2034 /* Add prefix, checking for repeated prefixes. */
2035 switch (add_prefix (current_templates
->start
->base_opcode
))
2040 expecting_string_instruction
= current_templates
->start
->name
;
2043 /* Skip past PREFIX_SEPARATOR and reset token_start. */
2050 if (!current_templates
)
2052 /* See if we can get a match by trimming off a suffix. */
2055 case WORD_MNEM_SUFFIX
:
2056 if (intel_syntax
&& (intel_float_operand (mnemonic
) & 2))
2057 i
.suffix
= SHORT_MNEM_SUFFIX
;
2059 case BYTE_MNEM_SUFFIX
:
2060 case QWORD_MNEM_SUFFIX
:
2061 i
.suffix
= mnem_p
[-1];
2063 current_templates
= hash_find (op_hash
, mnemonic
);
2065 case SHORT_MNEM_SUFFIX
:
2066 case LONG_MNEM_SUFFIX
:
2069 i
.suffix
= mnem_p
[-1];
2071 current_templates
= hash_find (op_hash
, mnemonic
);
2079 if (intel_float_operand (mnemonic
) == 1)
2080 i
.suffix
= SHORT_MNEM_SUFFIX
;
2082 i
.suffix
= LONG_MNEM_SUFFIX
;
2084 current_templates
= hash_find (op_hash
, mnemonic
);
2088 if (!current_templates
)
2090 as_bad (_("no such instruction: `%s'"), token_start
);
2095 if (current_templates
->start
->opcode_modifier
& (Jump
| JumpByte
))
2097 /* Check for a branch hint. We allow ",pt" and ",pn" for
2098 predict taken and predict not taken respectively.
2099 I'm not sure that branch hints actually do anything on loop
2100 and jcxz insns (JumpByte) for current Pentium4 chips. They
2101 may work in the future and it doesn't hurt to accept them
2103 if (l
[0] == ',' && l
[1] == 'p')
2107 if (!add_prefix (DS_PREFIX_OPCODE
))
2111 else if (l
[2] == 'n')
2113 if (!add_prefix (CS_PREFIX_OPCODE
))
2119 /* Any other comma loses. */
2122 as_bad (_("invalid character %s in mnemonic"),
2123 output_invalid (*l
));
2127 /* Check if instruction is supported on specified architecture. */
2129 for (t
= current_templates
->start
; t
< current_templates
->end
; ++t
)
2131 if (!((t
->cpu_flags
& ~(Cpu64
| CpuNo64
))
2132 & ~(cpu_arch_flags
& ~(Cpu64
| CpuNo64
))))
2134 if (!(t
->cpu_flags
& (flag_code
== CODE_64BIT
? CpuNo64
: Cpu64
)))
2137 if (!(supported
& 2))
2139 as_bad (flag_code
== CODE_64BIT
2140 ? _("`%s' is not supported in 64-bit mode")
2141 : _("`%s' is only supported in 64-bit mode"),
2142 current_templates
->start
->name
);
2145 if (!(supported
& 1))
2147 as_warn (_("`%s' is not supported on `%s%s'"),
2148 current_templates
->start
->name
,
2150 cpu_sub_arch_name
? cpu_sub_arch_name
: "");
2152 else if ((Cpu386
& ~cpu_arch_flags
) && (flag_code
!= CODE_16BIT
))
2154 as_warn (_("use .code16 to ensure correct addressing mode"));
2157 /* Check for rep/repne without a string instruction. */
2158 if (expecting_string_instruction
)
2160 static templates override
;
2162 for (t
= current_templates
->start
; t
< current_templates
->end
; ++t
)
2163 if (t
->opcode_modifier
& IsString
)
2165 if (t
>= current_templates
->end
)
2167 as_bad (_("expecting string instruction after `%s'"),
2168 expecting_string_instruction
);
2171 for (override
.start
= t
; t
< current_templates
->end
; ++t
)
2172 if (!(t
->opcode_modifier
& IsString
))
2175 current_templates
= &override
;
2182 parse_operands (l
, mnemonic
)
2184 const char *mnemonic
;
2188 /* 1 if operand is pending after ','. */
2189 unsigned int expecting_operand
= 0;
2191 /* Non-zero if operand parens not balanced. */
2192 unsigned int paren_not_balanced
;
2194 while (*l
!= END_OF_INSN
)
2196 /* Skip optional white space before operand. */
2197 if (is_space_char (*l
))
2199 if (!is_operand_char (*l
) && *l
!= END_OF_INSN
)
2201 as_bad (_("invalid character %s before operand %d"),
2202 output_invalid (*l
),
2206 token_start
= l
; /* after white space */
2207 paren_not_balanced
= 0;
2208 while (paren_not_balanced
|| *l
!= ',')
2210 if (*l
== END_OF_INSN
)
2212 if (paren_not_balanced
)
2215 as_bad (_("unbalanced parenthesis in operand %d."),
2218 as_bad (_("unbalanced brackets in operand %d."),
2223 break; /* we are done */
2225 else if (!is_operand_char (*l
) && !is_space_char (*l
))
2227 as_bad (_("invalid character %s in operand %d"),
2228 output_invalid (*l
),
2235 ++paren_not_balanced
;
2237 --paren_not_balanced
;
2242 ++paren_not_balanced
;
2244 --paren_not_balanced
;
2248 if (l
!= token_start
)
2249 { /* Yes, we've read in another operand. */
2250 unsigned int operand_ok
;
2251 this_operand
= i
.operands
++;
2252 if (i
.operands
> MAX_OPERANDS
)
2254 as_bad (_("spurious operands; (%d operands/instruction max)"),
2258 /* Now parse operand adding info to 'i' as we go along. */
2259 END_STRING_AND_SAVE (l
);
2263 i386_intel_operand (token_start
,
2264 intel_float_operand (mnemonic
));
2266 operand_ok
= i386_operand (token_start
);
2268 RESTORE_END_STRING (l
);
2274 if (expecting_operand
)
2276 expecting_operand_after_comma
:
2277 as_bad (_("expecting operand after ','; got nothing"));
2282 as_bad (_("expecting operand before ','; got nothing"));
2287 /* Now *l must be either ',' or END_OF_INSN. */
2290 if (*++l
== END_OF_INSN
)
2292 /* Just skip it, if it's \n complain. */
2293 goto expecting_operand_after_comma
;
2295 expecting_operand
= 1;
2302 swap_imm_operands ()
2304 union i386_op temp_op
;
2305 unsigned int temp_type
;
2306 enum bfd_reloc_code_real temp_reloc
;
2310 temp_type
= i
.types
[xchg2
];
2311 i
.types
[xchg2
] = i
.types
[xchg1
];
2312 i
.types
[xchg1
] = temp_type
;
2313 temp_op
= i
.op
[xchg2
];
2314 i
.op
[xchg2
] = i
.op
[xchg1
];
2315 i
.op
[xchg1
] = temp_op
;
2316 temp_reloc
= i
.reloc
[xchg2
];
2317 i
.reloc
[xchg2
] = i
.reloc
[xchg1
];
2318 i
.reloc
[xchg1
] = temp_reloc
;
2325 union i386_op temp_op
;
2326 unsigned int temp_type
;
2327 enum bfd_reloc_code_real temp_reloc
;
2331 if (i
.operands
== 4)
2332 /* There will be two exchanges in a 4 operand instruction.
2333 First exchange is the done inside this block.(1st and 4rth operand)
2334 The next exchange is done outside this block.(2nd and 3rd operand) */
2338 temp_type
= i
.types
[xchg2
];
2339 i
.types
[xchg2
] = i
.types
[xchg1
];
2340 i
.types
[xchg1
] = temp_type
;
2341 temp_op
= i
.op
[xchg2
];
2342 i
.op
[xchg2
] = i
.op
[xchg1
];
2343 i
.op
[xchg1
] = temp_op
;
2344 temp_reloc
= i
.reloc
[xchg2
];
2345 i
.reloc
[xchg2
] = i
.reloc
[xchg1
];
2346 i
.reloc
[xchg1
] = temp_reloc
;
2351 if (i
.operands
== 2)
2356 else if (i
.operands
== 3)
2361 temp_type
= i
.types
[xchg2
];
2362 i
.types
[xchg2
] = i
.types
[xchg1
];
2363 i
.types
[xchg1
] = temp_type
;
2364 temp_op
= i
.op
[xchg2
];
2365 i
.op
[xchg2
] = i
.op
[xchg1
];
2366 i
.op
[xchg1
] = temp_op
;
2367 temp_reloc
= i
.reloc
[xchg2
];
2368 i
.reloc
[xchg2
] = i
.reloc
[xchg1
];
2369 i
.reloc
[xchg1
] = temp_reloc
;
2371 if (i
.mem_operands
== 2)
2373 const seg_entry
*temp_seg
;
2374 temp_seg
= i
.seg
[0];
2375 i
.seg
[0] = i
.seg
[1];
2376 i
.seg
[1] = temp_seg
;
2380 /* Try to ensure constant immediates are represented in the smallest
2385 char guess_suffix
= 0;
2389 guess_suffix
= i
.suffix
;
2390 else if (i
.reg_operands
)
2392 /* Figure out a suffix from the last register operand specified.
2393 We can't do this properly yet, ie. excluding InOutPortReg,
2394 but the following works for instructions with immediates.
2395 In any case, we can't set i.suffix yet. */
2396 for (op
= i
.operands
; --op
>= 0;)
2397 if (i
.types
[op
] & Reg
)
2399 if (i
.types
[op
] & Reg8
)
2400 guess_suffix
= BYTE_MNEM_SUFFIX
;
2401 else if (i
.types
[op
] & Reg16
)
2402 guess_suffix
= WORD_MNEM_SUFFIX
;
2403 else if (i
.types
[op
] & Reg32
)
2404 guess_suffix
= LONG_MNEM_SUFFIX
;
2405 else if (i
.types
[op
] & Reg64
)
2406 guess_suffix
= QWORD_MNEM_SUFFIX
;
2410 else if ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[DATA_PREFIX
] != 0))
2411 guess_suffix
= WORD_MNEM_SUFFIX
;
2413 for (op
= i
.operands
; --op
>= 0;)
2414 if (i
.types
[op
] & Imm
)
2416 switch (i
.op
[op
].imms
->X_op
)
2419 /* If a suffix is given, this operand may be shortened. */
2420 switch (guess_suffix
)
2422 case LONG_MNEM_SUFFIX
:
2423 i
.types
[op
] |= Imm32
| Imm64
;
2425 case WORD_MNEM_SUFFIX
:
2426 i
.types
[op
] |= Imm16
| Imm32S
| Imm32
| Imm64
;
2428 case BYTE_MNEM_SUFFIX
:
2429 i
.types
[op
] |= Imm16
| Imm8
| Imm8S
| Imm32S
| Imm32
| Imm64
;
2433 /* If this operand is at most 16 bits, convert it
2434 to a signed 16 bit number before trying to see
2435 whether it will fit in an even smaller size.
2436 This allows a 16-bit operand such as $0xffe0 to
2437 be recognised as within Imm8S range. */
2438 if ((i
.types
[op
] & Imm16
)
2439 && (i
.op
[op
].imms
->X_add_number
& ~(offsetT
) 0xffff) == 0)
2441 i
.op
[op
].imms
->X_add_number
=
2442 (((i
.op
[op
].imms
->X_add_number
& 0xffff) ^ 0x8000) - 0x8000);
2444 if ((i
.types
[op
] & Imm32
)
2445 && ((i
.op
[op
].imms
->X_add_number
& ~(((offsetT
) 2 << 31) - 1))
2448 i
.op
[op
].imms
->X_add_number
= ((i
.op
[op
].imms
->X_add_number
2449 ^ ((offsetT
) 1 << 31))
2450 - ((offsetT
) 1 << 31));
2452 i
.types
[op
] |= smallest_imm_type (i
.op
[op
].imms
->X_add_number
);
2454 /* We must avoid matching of Imm32 templates when 64bit
2455 only immediate is available. */
2456 if (guess_suffix
== QWORD_MNEM_SUFFIX
)
2457 i
.types
[op
] &= ~Imm32
;
2464 /* Symbols and expressions. */
2466 /* Convert symbolic operand to proper sizes for matching, but don't
2467 prevent matching a set of insns that only supports sizes other
2468 than those matching the insn suffix. */
2470 unsigned int mask
, allowed
= 0;
2473 for (t
= current_templates
->start
; t
< current_templates
->end
; ++t
)
2474 allowed
|= t
->operand_types
[op
];
2475 switch (guess_suffix
)
2477 case QWORD_MNEM_SUFFIX
:
2478 mask
= Imm64
| Imm32S
;
2480 case LONG_MNEM_SUFFIX
:
2483 case WORD_MNEM_SUFFIX
:
2486 case BYTE_MNEM_SUFFIX
:
2494 i
.types
[op
] &= mask
;
2501 /* Try to use the smallest displacement type too. */
2507 for (op
= i
.operands
; --op
>= 0;)
2508 if (i
.types
[op
] & Disp
)
2510 if (i
.op
[op
].disps
->X_op
== O_constant
)
2512 offsetT disp
= i
.op
[op
].disps
->X_add_number
;
2514 if ((i
.types
[op
] & Disp16
)
2515 && (disp
& ~(offsetT
) 0xffff) == 0)
2517 /* If this operand is at most 16 bits, convert
2518 to a signed 16 bit number and don't use 64bit
2520 disp
= (((disp
& 0xffff) ^ 0x8000) - 0x8000);
2521 i
.types
[op
] &= ~Disp64
;
2523 if ((i
.types
[op
] & Disp32
)
2524 && (disp
& ~(((offsetT
) 2 << 31) - 1)) == 0)
2526 /* If this operand is at most 32 bits, convert
2527 to a signed 32 bit number and don't use 64bit
2529 disp
&= (((offsetT
) 2 << 31) - 1);
2530 disp
= (disp
^ ((offsetT
) 1 << 31)) - ((addressT
) 1 << 31);
2531 i
.types
[op
] &= ~Disp64
;
2533 if (!disp
&& (i
.types
[op
] & BaseIndex
))
2535 i
.types
[op
] &= ~Disp
;
2539 else if (flag_code
== CODE_64BIT
)
2541 if (fits_in_signed_long (disp
))
2543 i
.types
[op
] &= ~Disp64
;
2544 i
.types
[op
] |= Disp32S
;
2546 if (fits_in_unsigned_long (disp
))
2547 i
.types
[op
] |= Disp32
;
2549 if ((i
.types
[op
] & (Disp32
| Disp32S
| Disp16
))
2550 && fits_in_signed_byte (disp
))
2551 i
.types
[op
] |= Disp8
;
2553 else if (i
.reloc
[op
] == BFD_RELOC_386_TLS_DESC_CALL
2554 || i
.reloc
[op
] == BFD_RELOC_X86_64_TLSDESC_CALL
)
2556 fix_new_exp (frag_now
, frag_more (0) - frag_now
->fr_literal
, 0,
2557 i
.op
[op
].disps
, 0, i
.reloc
[op
]);
2558 i
.types
[op
] &= ~Disp
;
2561 /* We only support 64bit displacement on constants. */
2562 i
.types
[op
] &= ~Disp64
;
2569 /* Points to template once we've found it. */
2571 unsigned int overlap0
, overlap1
, overlap2
, overlap3
;
2572 unsigned int found_reverse_match
;
2574 unsigned int operand_types
[MAX_OPERANDS
];
2575 int addr_prefix_disp
;
2577 #if MAX_OPERANDS != 4
2578 # error "MAX_OPERANDS must be 4."
2581 #define MATCH(overlap, given, template) \
2582 ((overlap & ~JumpAbsolute) \
2583 && (((given) & (BaseIndex | JumpAbsolute)) \
2584 == ((overlap) & (BaseIndex | JumpAbsolute))))
2586 /* If given types r0 and r1 are registers they must be of the same type
2587 unless the expected operand type register overlap is null.
2588 Note that Acc in a template matches every size of reg. */
2589 #define CONSISTENT_REGISTER_MATCH(m0, g0, t0, m1, g1, t1) \
2590 (((g0) & Reg) == 0 || ((g1) & Reg) == 0 \
2591 || ((g0) & Reg) == ((g1) & Reg) \
2592 || ((((m0) & Acc) ? Reg : (t0)) & (((m1) & Acc) ? Reg : (t1)) & Reg) == 0 )
2598 found_reverse_match
= 0;
2599 operand_types
[0] = 0;
2600 operand_types
[1] = 0;
2601 operand_types
[2] = 0;
2602 operand_types
[3] = 0;
2603 addr_prefix_disp
= -1;
2604 suffix_check
= (i
.suffix
== BYTE_MNEM_SUFFIX
2606 : (i
.suffix
== WORD_MNEM_SUFFIX
2608 : (i
.suffix
== SHORT_MNEM_SUFFIX
2610 : (i
.suffix
== LONG_MNEM_SUFFIX
2612 : (i
.suffix
== QWORD_MNEM_SUFFIX
2614 : (i
.suffix
== LONG_DOUBLE_MNEM_SUFFIX
2615 ? No_xSuf
: 0))))));
2617 for (t
= current_templates
->start
; t
< current_templates
->end
; t
++)
2619 addr_prefix_disp
= -1;
2621 /* Must have right number of operands. */
2622 if (i
.operands
!= t
->operands
)
2625 /* Check the suffix, except for some instructions in intel mode. */
2626 if ((t
->opcode_modifier
& suffix_check
)
2628 && (t
->opcode_modifier
& IgnoreSize
)))
2631 operand_types
[0] = t
->operand_types
[0];
2632 operand_types
[1] = t
->operand_types
[1];
2633 operand_types
[2] = t
->operand_types
[2];
2634 operand_types
[3] = t
->operand_types
[3];
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 j
, 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 if (t
->operands
> 2)
2741 overlap2
= i
.types
[2] & operand_types
[2];
2742 if (t
->operands
> 3)
2743 overlap3
= i
.types
[3] & operand_types
[3];
2745 switch (t
->operands
)
2748 if (!MATCH (overlap3
, i
.types
[3], operand_types
[3])
2749 || !CONSISTENT_REGISTER_MATCH (overlap2
,
2757 /* Here we make use of the fact that there are no
2758 reverse match 3 operand instructions, and all 3
2759 operand instructions only need to be checked for
2760 register consistency between operands 2 and 3. */
2761 if (!MATCH (overlap2
, i
.types
[2], operand_types
[2])
2762 || !CONSISTENT_REGISTER_MATCH (overlap1
,
2772 /* Found either forward/reverse 2, 3 or 4 operand match here:
2773 slip through to break. */
2775 if (t
->cpu_flags
& ~cpu_arch_flags
)
2777 found_reverse_match
= 0;
2780 /* We've found a match; break out of loop. */
2784 if (t
== current_templates
->end
)
2786 /* We found no match. */
2787 as_bad (_("suffix or operands invalid for `%s'"),
2788 current_templates
->start
->name
);
2792 if (!quiet_warnings
)
2795 && ((i
.types
[0] & JumpAbsolute
)
2796 != (operand_types
[0] & JumpAbsolute
)))
2798 as_warn (_("indirect %s without `*'"), t
->name
);
2801 if ((t
->opcode_modifier
& (IsPrefix
| IgnoreSize
))
2802 == (IsPrefix
| IgnoreSize
))
2804 /* Warn them that a data or address size prefix doesn't
2805 affect assembly of the next line of code. */
2806 as_warn (_("stand-alone `%s' prefix"), t
->name
);
2810 /* Copy the template we found. */
2813 if (addr_prefix_disp
!= -1)
2814 i
.tm
.operand_types
[addr_prefix_disp
]
2815 = operand_types
[addr_prefix_disp
];
2817 if (found_reverse_match
)
2819 /* If we found a reverse match we must alter the opcode
2820 direction bit. found_reverse_match holds bits to change
2821 (different for int & float insns). */
2823 i
.tm
.base_opcode
^= found_reverse_match
;
2825 i
.tm
.operand_types
[0] = operand_types
[1];
2826 i
.tm
.operand_types
[1] = operand_types
[0];
2835 int mem_op
= (i
.types
[0] & AnyMem
) ? 0 : 1;
2836 if ((i
.tm
.operand_types
[mem_op
] & EsSeg
) != 0)
2838 if (i
.seg
[0] != NULL
&& i
.seg
[0] != &es
)
2840 as_bad (_("`%s' operand %d must use `%%es' segment"),
2845 /* There's only ever one segment override allowed per instruction.
2846 This instruction possibly has a legal segment override on the
2847 second operand, so copy the segment to where non-string
2848 instructions store it, allowing common code. */
2849 i
.seg
[0] = i
.seg
[1];
2851 else if ((i
.tm
.operand_types
[mem_op
+ 1] & EsSeg
) != 0)
2853 if (i
.seg
[1] != NULL
&& i
.seg
[1] != &es
)
2855 as_bad (_("`%s' operand %d must use `%%es' segment"),
2865 process_suffix (void)
2867 /* If matched instruction specifies an explicit instruction mnemonic
2869 if (i
.tm
.opcode_modifier
& (Size16
| Size32
| Size64
))
2871 if (i
.tm
.opcode_modifier
& Size16
)
2872 i
.suffix
= WORD_MNEM_SUFFIX
;
2873 else if (i
.tm
.opcode_modifier
& Size64
)
2874 i
.suffix
= QWORD_MNEM_SUFFIX
;
2876 i
.suffix
= LONG_MNEM_SUFFIX
;
2878 else if (i
.reg_operands
)
2880 /* If there's no instruction mnemonic suffix we try to invent one
2881 based on register operands. */
2884 /* We take i.suffix from the last register operand specified,
2885 Destination register type is more significant than source
2889 for (op
= i
.operands
; --op
>= 0;)
2890 if ((i
.types
[op
] & Reg
)
2891 && !(i
.tm
.operand_types
[op
] & InOutPortReg
))
2893 i
.suffix
= ((i
.types
[op
] & Reg8
) ? BYTE_MNEM_SUFFIX
:
2894 (i
.types
[op
] & Reg16
) ? WORD_MNEM_SUFFIX
:
2895 (i
.types
[op
] & Reg64
) ? QWORD_MNEM_SUFFIX
:
2900 else if (i
.suffix
== BYTE_MNEM_SUFFIX
)
2902 if (!check_byte_reg ())
2905 else if (i
.suffix
== LONG_MNEM_SUFFIX
)
2907 if (!check_long_reg ())
2910 else if (i
.suffix
== QWORD_MNEM_SUFFIX
)
2912 if (!check_qword_reg ())
2915 else if (i
.suffix
== WORD_MNEM_SUFFIX
)
2917 if (!check_word_reg ())
2920 else if (intel_syntax
&& (i
.tm
.opcode_modifier
& IgnoreSize
))
2921 /* Do nothing if the instruction is going to ignore the prefix. */
2926 else if ((i
.tm
.opcode_modifier
& DefaultSize
)
2928 /* exclude fldenv/frstor/fsave/fstenv */
2929 && (i
.tm
.opcode_modifier
& No_sSuf
))
2931 i
.suffix
= stackop_size
;
2933 else if (intel_syntax
2935 && ((i
.tm
.operand_types
[0] & JumpAbsolute
)
2936 || (i
.tm
.opcode_modifier
& (JumpByte
|JumpInterSegment
))
2937 || (i
.tm
.base_opcode
== 0x0f01 /* [ls][gi]dt */
2938 && i
.tm
.extension_opcode
<= 3)))
2943 if (!(i
.tm
.opcode_modifier
& No_qSuf
))
2945 i
.suffix
= QWORD_MNEM_SUFFIX
;
2949 if (!(i
.tm
.opcode_modifier
& No_lSuf
))
2950 i
.suffix
= LONG_MNEM_SUFFIX
;
2953 if (!(i
.tm
.opcode_modifier
& No_wSuf
))
2954 i
.suffix
= WORD_MNEM_SUFFIX
;
2963 if (i
.tm
.opcode_modifier
& W
)
2965 as_bad (_("no instruction mnemonic suffix given and no register operands; can't size instruction"));
2971 unsigned int suffixes
= (~i
.tm
.opcode_modifier
2979 if ((i
.tm
.opcode_modifier
& W
)
2980 || ((suffixes
& (suffixes
- 1))
2981 && !(i
.tm
.opcode_modifier
& (DefaultSize
| IgnoreSize
))))
2983 as_bad (_("ambiguous operand size for `%s'"), i
.tm
.name
);
2989 /* Change the opcode based on the operand size given by i.suffix;
2990 We don't need to change things for byte insns. */
2992 if (i
.suffix
&& i
.suffix
!= BYTE_MNEM_SUFFIX
)
2994 /* It's not a byte, select word/dword operation. */
2995 if (i
.tm
.opcode_modifier
& W
)
2997 if (i
.tm
.opcode_modifier
& ShortForm
)
2998 i
.tm
.base_opcode
|= 8;
3000 i
.tm
.base_opcode
|= 1;
3003 /* Now select between word & dword operations via the operand
3004 size prefix, except for instructions that will ignore this
3006 if (i
.tm
.base_opcode
== 0x0f01 && i
.tm
.extension_opcode
== 0xc8)
3008 /* monitor in SSE3 is a very special case. The default size
3009 of AX is the size of mode. The address size override
3010 prefix will change the size of AX. */
3011 if (i
.op
->regs
[0].reg_type
&
3012 (flag_code
== CODE_32BIT
? Reg16
: Reg32
))
3013 if (!add_prefix (ADDR_PREFIX_OPCODE
))
3016 else if (i
.suffix
!= QWORD_MNEM_SUFFIX
3017 && i
.suffix
!= LONG_DOUBLE_MNEM_SUFFIX
3018 && !(i
.tm
.opcode_modifier
& (IgnoreSize
| FloatMF
))
3019 && ((i
.suffix
== LONG_MNEM_SUFFIX
) == (flag_code
== CODE_16BIT
)
3020 || (flag_code
== CODE_64BIT
3021 && (i
.tm
.opcode_modifier
& JumpByte
))))
3023 unsigned int prefix
= DATA_PREFIX_OPCODE
;
3025 if (i
.tm
.opcode_modifier
& JumpByte
) /* jcxz, loop */
3026 prefix
= ADDR_PREFIX_OPCODE
;
3028 if (!add_prefix (prefix
))
3032 /* Set mode64 for an operand. */
3033 if (i
.suffix
== QWORD_MNEM_SUFFIX
3034 && flag_code
== CODE_64BIT
3035 && (i
.tm
.opcode_modifier
& NoRex64
) == 0)
3037 /* Special case for xchg %rax,%rax. It is NOP and doesn't
3040 || i
.types
[0] != (Acc
| Reg64
)
3041 || i
.types
[1] != (Acc
| Reg64
)
3042 || strcmp (i
.tm
.name
, "xchg") != 0)
3043 i
.rex
|= REX_MODE64
;
3046 /* Size floating point instruction. */
3047 if (i
.suffix
== LONG_MNEM_SUFFIX
)
3048 if (i
.tm
.opcode_modifier
& FloatMF
)
3049 i
.tm
.base_opcode
^= 4;
3056 check_byte_reg (void)
3060 for (op
= i
.operands
; --op
>= 0;)
3062 /* If this is an eight bit register, it's OK. If it's the 16 or
3063 32 bit version of an eight bit register, we will just use the
3064 low portion, and that's OK too. */
3065 if (i
.types
[op
] & Reg8
)
3068 /* movzx and movsx should not generate this warning. */
3070 && (i
.tm
.base_opcode
== 0xfb7
3071 || i
.tm
.base_opcode
== 0xfb6
3072 || i
.tm
.base_opcode
== 0x63
3073 || i
.tm
.base_opcode
== 0xfbe
3074 || i
.tm
.base_opcode
== 0xfbf))
3077 if ((i
.types
[op
] & WordReg
) && i
.op
[op
].regs
->reg_num
< 4)
3079 /* Prohibit these changes in the 64bit mode, since the
3080 lowering is more complicated. */
3081 if (flag_code
== CODE_64BIT
3082 && (i
.tm
.operand_types
[op
] & InOutPortReg
) == 0)
3084 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
3085 i
.op
[op
].regs
->reg_name
,
3089 #if REGISTER_WARNINGS
3091 && (i
.tm
.operand_types
[op
] & InOutPortReg
) == 0)
3092 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
3093 (i
.op
[op
].regs
+ (i
.types
[op
] & Reg16
3094 ? REGNAM_AL
- REGNAM_AX
3095 : REGNAM_AL
- REGNAM_EAX
))->reg_name
,
3096 i
.op
[op
].regs
->reg_name
,
3101 /* Any other register is bad. */
3102 if (i
.types
[op
] & (Reg
| RegMMX
| RegXMM
3104 | Control
| Debug
| Test
3105 | FloatReg
| FloatAcc
))
3107 as_bad (_("`%%%s' not allowed with `%s%c'"),
3108 i
.op
[op
].regs
->reg_name
,
3122 for (op
= i
.operands
; --op
>= 0;)
3123 /* Reject eight bit registers, except where the template requires
3124 them. (eg. movzb) */
3125 if ((i
.types
[op
] & Reg8
) != 0
3126 && (i
.tm
.operand_types
[op
] & (Reg16
| Reg32
| Acc
)) != 0)
3128 as_bad (_("`%%%s' not allowed with `%s%c'"),
3129 i
.op
[op
].regs
->reg_name
,
3134 /* Warn if the e prefix on a general reg is missing. */
3135 else if ((!quiet_warnings
|| flag_code
== CODE_64BIT
)
3136 && (i
.types
[op
] & Reg16
) != 0
3137 && (i
.tm
.operand_types
[op
] & (Reg32
| Acc
)) != 0)
3139 /* Prohibit these changes in the 64bit mode, since the
3140 lowering is more complicated. */
3141 if (flag_code
== CODE_64BIT
)
3143 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
3144 i
.op
[op
].regs
->reg_name
,
3148 #if REGISTER_WARNINGS
3150 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
3151 (i
.op
[op
].regs
+ REGNAM_EAX
- REGNAM_AX
)->reg_name
,
3152 i
.op
[op
].regs
->reg_name
,
3156 /* Warn if the r prefix on a general reg is missing. */
3157 else if ((i
.types
[op
] & Reg64
) != 0
3158 && (i
.tm
.operand_types
[op
] & (Reg32
| Acc
)) != 0)
3160 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
3161 i
.op
[op
].regs
->reg_name
,
3173 for (op
= i
.operands
; --op
>= 0; )
3174 /* Reject eight bit registers, except where the template requires
3175 them. (eg. movzb) */
3176 if ((i
.types
[op
] & Reg8
) != 0
3177 && (i
.tm
.operand_types
[op
] & (Reg16
| Reg32
| Acc
)) != 0)
3179 as_bad (_("`%%%s' not allowed with `%s%c'"),
3180 i
.op
[op
].regs
->reg_name
,
3185 /* Warn if the e prefix on a general reg is missing. */
3186 else if (((i
.types
[op
] & Reg16
) != 0
3187 || (i
.types
[op
] & Reg32
) != 0)
3188 && (i
.tm
.operand_types
[op
] & (Reg32
| Acc
)) != 0)
3190 /* Prohibit these changes in the 64bit mode, since the
3191 lowering is more complicated. */
3192 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
3193 i
.op
[op
].regs
->reg_name
,
3204 for (op
= i
.operands
; --op
>= 0;)
3205 /* Reject eight bit registers, except where the template requires
3206 them. (eg. movzb) */
3207 if ((i
.types
[op
] & Reg8
) != 0
3208 && (i
.tm
.operand_types
[op
] & (Reg16
| Reg32
| Acc
)) != 0)
3210 as_bad (_("`%%%s' not allowed with `%s%c'"),
3211 i
.op
[op
].regs
->reg_name
,
3216 /* Warn if the e prefix on a general reg is present. */
3217 else if ((!quiet_warnings
|| flag_code
== CODE_64BIT
)
3218 && (i
.types
[op
] & Reg32
) != 0
3219 && (i
.tm
.operand_types
[op
] & (Reg16
| Acc
)) != 0)
3221 /* Prohibit these changes in the 64bit mode, since the
3222 lowering is more complicated. */
3223 if (flag_code
== CODE_64BIT
)
3225 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
3226 i
.op
[op
].regs
->reg_name
,
3231 #if REGISTER_WARNINGS
3232 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
3233 (i
.op
[op
].regs
+ REGNAM_AX
- REGNAM_EAX
)->reg_name
,
3234 i
.op
[op
].regs
->reg_name
,
3244 unsigned int overlap0
, overlap1
, overlap2
;
3246 overlap0
= i
.types
[0] & i
.tm
.operand_types
[0];
3247 if ((overlap0
& (Imm8
| Imm8S
| Imm16
| Imm32
| Imm32S
| Imm64
))
3248 && overlap0
!= Imm8
&& overlap0
!= Imm8S
3249 && overlap0
!= Imm16
&& overlap0
!= Imm32S
3250 && overlap0
!= Imm32
&& overlap0
!= Imm64
)
3254 overlap0
&= (i
.suffix
== BYTE_MNEM_SUFFIX
3256 : (i
.suffix
== WORD_MNEM_SUFFIX
3258 : (i
.suffix
== QWORD_MNEM_SUFFIX
3262 else if (overlap0
== (Imm16
| Imm32S
| Imm32
)
3263 || overlap0
== (Imm16
| Imm32
)
3264 || overlap0
== (Imm16
| Imm32S
))
3266 overlap0
= ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[DATA_PREFIX
] != 0)
3269 if (overlap0
!= Imm8
&& overlap0
!= Imm8S
3270 && overlap0
!= Imm16
&& overlap0
!= Imm32S
3271 && overlap0
!= Imm32
&& overlap0
!= Imm64
)
3273 as_bad (_("no instruction mnemonic suffix given; can't determine immediate size"));
3277 i
.types
[0] = overlap0
;
3279 overlap1
= i
.types
[1] & i
.tm
.operand_types
[1];
3280 if ((overlap1
& (Imm8
| Imm8S
| Imm16
| Imm32S
| Imm32
| Imm64
))
3281 && overlap1
!= Imm8
&& overlap1
!= Imm8S
3282 && overlap1
!= Imm16
&& overlap1
!= Imm32S
3283 && overlap1
!= Imm32
&& overlap1
!= Imm64
)
3287 overlap1
&= (i
.suffix
== BYTE_MNEM_SUFFIX
3289 : (i
.suffix
== WORD_MNEM_SUFFIX
3291 : (i
.suffix
== QWORD_MNEM_SUFFIX
3295 else if (overlap1
== (Imm16
| Imm32
| Imm32S
)
3296 || overlap1
== (Imm16
| Imm32
)
3297 || overlap1
== (Imm16
| Imm32S
))
3299 overlap1
= ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[DATA_PREFIX
] != 0)
3302 if (overlap1
!= Imm8
&& overlap1
!= Imm8S
3303 && overlap1
!= Imm16
&& overlap1
!= Imm32S
3304 && overlap1
!= Imm32
&& overlap1
!= Imm64
)
3306 as_bad (_("no instruction mnemonic suffix given; can't determine immediate size %x %c"),overlap1
, i
.suffix
);
3310 i
.types
[1] = overlap1
;
3312 overlap2
= i
.types
[2] & i
.tm
.operand_types
[2];
3313 assert ((overlap2
& Imm
) == 0);
3314 i
.types
[2] = overlap2
;
3322 /* Default segment register this instruction will use for memory
3323 accesses. 0 means unknown. This is only for optimizing out
3324 unnecessary segment overrides. */
3325 const seg_entry
*default_seg
= 0;
3327 /* The imul $imm, %reg instruction is converted into
3328 imul $imm, %reg, %reg, and the clr %reg instruction
3329 is converted into xor %reg, %reg. */
3330 if (i
.tm
.opcode_modifier
& regKludge
)
3332 unsigned int first_reg_op
= (i
.types
[0] & Reg
) ? 0 : 1;
3333 /* Pretend we saw the extra register operand. */
3334 assert (i
.op
[first_reg_op
+ 1].regs
== 0);
3335 i
.op
[first_reg_op
+ 1].regs
= i
.op
[first_reg_op
].regs
;
3336 i
.types
[first_reg_op
+ 1] = i
.types
[first_reg_op
];
3340 if (i
.tm
.opcode_modifier
& ShortForm
)
3342 /* The register or float register operand is in operand 0 or 1. */
3343 unsigned int op
= (i
.types
[0] & (Reg
| FloatReg
)) ? 0 : 1;
3344 /* Register goes in low 3 bits of opcode. */
3345 i
.tm
.base_opcode
|= i
.op
[op
].regs
->reg_num
;
3346 if ((i
.op
[op
].regs
->reg_flags
& RegRex
) != 0)
3348 if (!quiet_warnings
&& (i
.tm
.opcode_modifier
& Ugh
) != 0)
3350 /* Warn about some common errors, but press on regardless.
3351 The first case can be generated by gcc (<= 2.8.1). */
3352 if (i
.operands
== 2)
3354 /* Reversed arguments on faddp, fsubp, etc. */
3355 as_warn (_("translating to `%s %%%s,%%%s'"), i
.tm
.name
,
3356 i
.op
[1].regs
->reg_name
,
3357 i
.op
[0].regs
->reg_name
);
3361 /* Extraneous `l' suffix on fp insn. */
3362 as_warn (_("translating to `%s %%%s'"), i
.tm
.name
,
3363 i
.op
[0].regs
->reg_name
);
3367 else if (i
.tm
.opcode_modifier
& Modrm
)
3369 /* The opcode is completed (modulo i.tm.extension_opcode which
3370 must be put into the modrm byte). Now, we make the modrm and
3371 index base bytes based on all the info we've collected. */
3373 default_seg
= build_modrm_byte ();
3375 else if (i
.tm
.opcode_modifier
& (Seg2ShortForm
| Seg3ShortForm
))
3377 if (i
.tm
.base_opcode
== POP_SEG_SHORT
3378 && i
.op
[0].regs
->reg_num
== 1)
3380 as_bad (_("you can't `pop %%cs'"));
3383 i
.tm
.base_opcode
|= (i
.op
[0].regs
->reg_num
<< 3);
3384 if ((i
.op
[0].regs
->reg_flags
& RegRex
) != 0)
3387 else if ((i
.tm
.base_opcode
& ~(D
| W
)) == MOV_AX_DISP32
)
3391 else if ((i
.tm
.opcode_modifier
& IsString
) != 0)
3393 /* For the string instructions that allow a segment override
3394 on one of their operands, the default segment is ds. */
3398 if ((i
.tm
.base_opcode
== 0x8d /* lea */
3399 || (i
.tm
.cpu_flags
& CpuSVME
))
3400 && i
.seg
[0] && !quiet_warnings
)
3401 as_warn (_("segment override on `%s' is ineffectual"), i
.tm
.name
);
3403 /* If a segment was explicitly specified, and the specified segment
3404 is not the default, use an opcode prefix to select it. If we
3405 never figured out what the default segment is, then default_seg
3406 will be zero at this point, and the specified segment prefix will
3408 if ((i
.seg
[0]) && (i
.seg
[0] != default_seg
))
3410 if (!add_prefix (i
.seg
[0]->seg_prefix
))
3416 static const seg_entry
*
3419 const seg_entry
*default_seg
= 0;
3421 /* i.reg_operands MUST be the number of real register operands;
3422 implicit registers do not count. */
3423 if (i
.reg_operands
== 2)
3425 unsigned int source
, dest
;
3426 source
= ((i
.types
[0]
3427 & (Reg
| RegMMX
| RegXMM
3429 | Control
| Debug
| Test
))
3432 /* In 4 operands instructions with 2 immediate operands, the first two are immediate
3433 bytes and hence source operand will be in the next byte after the immediates */
3434 if ((i
.operands
== 4)&&(i
.imm_operands
=2)) source
++;
3438 /* One of the register operands will be encoded in the i.tm.reg
3439 field, the other in the combined i.tm.mode and i.tm.regmem
3440 fields. If no form of this instruction supports a memory
3441 destination operand, then we assume the source operand may
3442 sometimes be a memory operand and so we need to store the
3443 destination in the i.rm.reg field. */
3444 if ((i
.tm
.operand_types
[dest
] & AnyMem
) == 0)
3446 i
.rm
.reg
= i
.op
[dest
].regs
->reg_num
;
3447 i
.rm
.regmem
= i
.op
[source
].regs
->reg_num
;
3448 if ((i
.op
[dest
].regs
->reg_flags
& RegRex
) != 0)
3450 if ((i
.op
[source
].regs
->reg_flags
& RegRex
) != 0)
3455 i
.rm
.reg
= i
.op
[source
].regs
->reg_num
;
3456 i
.rm
.regmem
= i
.op
[dest
].regs
->reg_num
;
3457 if ((i
.op
[dest
].regs
->reg_flags
& RegRex
) != 0)
3459 if ((i
.op
[source
].regs
->reg_flags
& RegRex
) != 0)
3462 if (flag_code
!= CODE_64BIT
&& (i
.rex
& (REX_EXTX
| REX_EXTZ
)))
3464 if (!((i
.types
[0] | i
.types
[1]) & Control
))
3466 i
.rex
&= ~(REX_EXTX
| REX_EXTZ
);
3467 add_prefix (LOCK_PREFIX_OPCODE
);
3471 { /* If it's not 2 reg operands... */
3474 unsigned int fake_zero_displacement
= 0;
3475 unsigned int op
= ((i
.types
[0] & AnyMem
)
3477 : (i
.types
[1] & AnyMem
) ? 1 : 2);
3481 if (i
.base_reg
== 0)
3484 if (!i
.disp_operands
)
3485 fake_zero_displacement
= 1;
3486 if (i
.index_reg
== 0)
3488 /* Operand is just <disp> */
3489 if (flag_code
== CODE_64BIT
)
3491 /* 64bit mode overwrites the 32bit absolute
3492 addressing by RIP relative addressing and
3493 absolute addressing is encoded by one of the
3494 redundant SIB forms. */
3495 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
3496 i
.sib
.base
= NO_BASE_REGISTER
;
3497 i
.sib
.index
= NO_INDEX_REGISTER
;
3498 i
.types
[op
] = ((i
.prefix
[ADDR_PREFIX
] == 0) ? Disp32S
: Disp32
);
3500 else if ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[ADDR_PREFIX
] != 0))
3502 i
.rm
.regmem
= NO_BASE_REGISTER_16
;
3503 i
.types
[op
] = Disp16
;
3507 i
.rm
.regmem
= NO_BASE_REGISTER
;
3508 i
.types
[op
] = Disp32
;
3511 else /* !i.base_reg && i.index_reg */
3513 i
.sib
.index
= i
.index_reg
->reg_num
;
3514 i
.sib
.base
= NO_BASE_REGISTER
;
3515 i
.sib
.scale
= i
.log2_scale_factor
;
3516 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
3517 i
.types
[op
] &= ~Disp
;
3518 if (flag_code
!= CODE_64BIT
)
3519 i
.types
[op
] |= Disp32
; /* Must be 32 bit */
3521 i
.types
[op
] |= Disp32S
;
3522 if ((i
.index_reg
->reg_flags
& RegRex
) != 0)
3526 /* RIP addressing for 64bit mode. */
3527 else if (i
.base_reg
->reg_type
== BaseIndex
)
3529 i
.rm
.regmem
= NO_BASE_REGISTER
;
3530 i
.types
[op
] &= ~ Disp
;
3531 i
.types
[op
] |= Disp32S
;
3532 i
.flags
[op
] = Operand_PCrel
;
3533 if (! i
.disp_operands
)
3534 fake_zero_displacement
= 1;
3536 else if (i
.base_reg
->reg_type
& Reg16
)
3538 switch (i
.base_reg
->reg_num
)
3541 if (i
.index_reg
== 0)
3543 else /* (%bx,%si) -> 0, or (%bx,%di) -> 1 */
3544 i
.rm
.regmem
= i
.index_reg
->reg_num
- 6;
3548 if (i
.index_reg
== 0)
3551 if ((i
.types
[op
] & Disp
) == 0)
3553 /* fake (%bp) into 0(%bp) */
3554 i
.types
[op
] |= Disp8
;
3555 fake_zero_displacement
= 1;
3558 else /* (%bp,%si) -> 2, or (%bp,%di) -> 3 */
3559 i
.rm
.regmem
= i
.index_reg
->reg_num
- 6 + 2;
3561 default: /* (%si) -> 4 or (%di) -> 5 */
3562 i
.rm
.regmem
= i
.base_reg
->reg_num
- 6 + 4;
3564 i
.rm
.mode
= mode_from_disp_size (i
.types
[op
]);
3566 else /* i.base_reg and 32/64 bit mode */
3568 if (flag_code
== CODE_64BIT
3569 && (i
.types
[op
] & Disp
))
3570 i
.types
[op
] = (i
.types
[op
] & Disp8
) | (i
.prefix
[ADDR_PREFIX
] == 0 ? Disp32S
: Disp32
);
3572 i
.rm
.regmem
= i
.base_reg
->reg_num
;
3573 if ((i
.base_reg
->reg_flags
& RegRex
) != 0)
3575 i
.sib
.base
= i
.base_reg
->reg_num
;
3576 /* x86-64 ignores REX prefix bit here to avoid decoder
3578 if ((i
.base_reg
->reg_num
& 7) == EBP_REG_NUM
)
3581 if (i
.disp_operands
== 0)
3583 fake_zero_displacement
= 1;
3584 i
.types
[op
] |= Disp8
;
3587 else if (i
.base_reg
->reg_num
== ESP_REG_NUM
)
3591 i
.sib
.scale
= i
.log2_scale_factor
;
3592 if (i
.index_reg
== 0)
3594 /* <disp>(%esp) becomes two byte modrm with no index
3595 register. We've already stored the code for esp
3596 in i.rm.regmem ie. ESCAPE_TO_TWO_BYTE_ADDRESSING.
3597 Any base register besides %esp will not use the
3598 extra modrm byte. */
3599 i
.sib
.index
= NO_INDEX_REGISTER
;
3600 #if !SCALE1_WHEN_NO_INDEX
3601 /* Another case where we force the second modrm byte. */
3602 if (i
.log2_scale_factor
)
3603 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
3608 i
.sib
.index
= i
.index_reg
->reg_num
;
3609 i
.rm
.regmem
= ESCAPE_TO_TWO_BYTE_ADDRESSING
;
3610 if ((i
.index_reg
->reg_flags
& RegRex
) != 0)
3615 && (i
.reloc
[op
] == BFD_RELOC_386_TLS_DESC_CALL
3616 || i
.reloc
[op
] == BFD_RELOC_X86_64_TLSDESC_CALL
))
3619 i
.rm
.mode
= mode_from_disp_size (i
.types
[op
]);
3622 if (fake_zero_displacement
)
3624 /* Fakes a zero displacement assuming that i.types[op]
3625 holds the correct displacement size. */
3628 assert (i
.op
[op
].disps
== 0);
3629 exp
= &disp_expressions
[i
.disp_operands
++];
3630 i
.op
[op
].disps
= exp
;
3631 exp
->X_op
= O_constant
;
3632 exp
->X_add_number
= 0;
3633 exp
->X_add_symbol
= (symbolS
*) 0;
3634 exp
->X_op_symbol
= (symbolS
*) 0;
3638 /* Fill in i.rm.reg or i.rm.regmem field with register operand
3639 (if any) based on i.tm.extension_opcode. Again, we must be
3640 careful to make sure that segment/control/debug/test/MMX
3641 registers are coded into the i.rm.reg field. */
3646 & (Reg
| RegMMX
| RegXMM
3648 | Control
| Debug
| Test
))
3651 & (Reg
| RegMMX
| RegXMM
3653 | Control
| Debug
| Test
))
3656 /* If there is an extension opcode to put here, the register
3657 number must be put into the regmem field. */
3658 if (i
.tm
.extension_opcode
!= None
)
3660 i
.rm
.regmem
= i
.op
[op
].regs
->reg_num
;
3661 if ((i
.op
[op
].regs
->reg_flags
& RegRex
) != 0)
3666 i
.rm
.reg
= i
.op
[op
].regs
->reg_num
;
3667 if ((i
.op
[op
].regs
->reg_flags
& RegRex
) != 0)
3671 /* Now, if no memory operand has set i.rm.mode = 0, 1, 2 we
3672 must set it to 3 to indicate this is a register operand
3673 in the regmem field. */
3674 if (!i
.mem_operands
)
3678 /* Fill in i.rm.reg field with extension opcode (if any). */
3679 if (i
.tm
.extension_opcode
!= None
)
3680 i
.rm
.reg
= i
.tm
.extension_opcode
;
3691 relax_substateT subtype
;
3696 if (flag_code
== CODE_16BIT
)
3700 if (i
.prefix
[DATA_PREFIX
] != 0)
3706 /* Pentium4 branch hints. */
3707 if (i
.prefix
[SEG_PREFIX
] == CS_PREFIX_OPCODE
/* not taken */
3708 || i
.prefix
[SEG_PREFIX
] == DS_PREFIX_OPCODE
/* taken */)
3713 if (i
.prefix
[REX_PREFIX
] != 0)
3719 if (i
.prefixes
!= 0 && !intel_syntax
)
3720 as_warn (_("skipping prefixes on this instruction"));
3722 /* It's always a symbol; End frag & setup for relax.
3723 Make sure there is enough room in this frag for the largest
3724 instruction we may generate in md_convert_frag. This is 2
3725 bytes for the opcode and room for the prefix and largest
3727 frag_grow (prefix
+ 2 + 4);
3728 /* Prefix and 1 opcode byte go in fr_fix. */
3729 p
= frag_more (prefix
+ 1);
3730 if (i
.prefix
[DATA_PREFIX
] != 0)
3731 *p
++ = DATA_PREFIX_OPCODE
;
3732 if (i
.prefix
[SEG_PREFIX
] == CS_PREFIX_OPCODE
3733 || i
.prefix
[SEG_PREFIX
] == DS_PREFIX_OPCODE
)
3734 *p
++ = i
.prefix
[SEG_PREFIX
];
3735 if (i
.prefix
[REX_PREFIX
] != 0)
3736 *p
++ = i
.prefix
[REX_PREFIX
];
3737 *p
= i
.tm
.base_opcode
;
3739 if ((unsigned char) *p
== JUMP_PC_RELATIVE
)
3740 subtype
= ENCODE_RELAX_STATE (UNCOND_JUMP
, SMALL
);
3741 else if ((cpu_arch_flags
& Cpu386
) != 0)
3742 subtype
= ENCODE_RELAX_STATE (COND_JUMP
, SMALL
);
3744 subtype
= ENCODE_RELAX_STATE (COND_JUMP86
, SMALL
);
3747 sym
= i
.op
[0].disps
->X_add_symbol
;
3748 off
= i
.op
[0].disps
->X_add_number
;
3750 if (i
.op
[0].disps
->X_op
!= O_constant
3751 && i
.op
[0].disps
->X_op
!= O_symbol
)
3753 /* Handle complex expressions. */
3754 sym
= make_expr_symbol (i
.op
[0].disps
);
3758 /* 1 possible extra opcode + 4 byte displacement go in var part.
3759 Pass reloc in fr_var. */
3760 frag_var (rs_machine_dependent
, 5, i
.reloc
[0], subtype
, sym
, off
, p
);
3770 if (i
.tm
.opcode_modifier
& JumpByte
)
3772 /* This is a loop or jecxz type instruction. */
3774 if (i
.prefix
[ADDR_PREFIX
] != 0)
3776 FRAG_APPEND_1_CHAR (ADDR_PREFIX_OPCODE
);
3779 /* Pentium4 branch hints. */
3780 if (i
.prefix
[SEG_PREFIX
] == CS_PREFIX_OPCODE
/* not taken */
3781 || i
.prefix
[SEG_PREFIX
] == DS_PREFIX_OPCODE
/* taken */)
3783 FRAG_APPEND_1_CHAR (i
.prefix
[SEG_PREFIX
]);
3792 if (flag_code
== CODE_16BIT
)
3795 if (i
.prefix
[DATA_PREFIX
] != 0)
3797 FRAG_APPEND_1_CHAR (DATA_PREFIX_OPCODE
);
3807 if (i
.prefix
[REX_PREFIX
] != 0)
3809 FRAG_APPEND_1_CHAR (i
.prefix
[REX_PREFIX
]);
3813 if (i
.prefixes
!= 0 && !intel_syntax
)
3814 as_warn (_("skipping prefixes on this instruction"));
3816 p
= frag_more (1 + size
);
3817 *p
++ = i
.tm
.base_opcode
;
3819 fixP
= fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
3820 i
.op
[0].disps
, 1, reloc (size
, 1, 1, i
.reloc
[0]));
3822 /* All jumps handled here are signed, but don't use a signed limit
3823 check for 32 and 16 bit jumps as we want to allow wrap around at
3824 4G and 64k respectively. */
3826 fixP
->fx_signed
= 1;
3830 output_interseg_jump ()
3838 if (flag_code
== CODE_16BIT
)
3842 if (i
.prefix
[DATA_PREFIX
] != 0)
3848 if (i
.prefix
[REX_PREFIX
] != 0)
3858 if (i
.prefixes
!= 0 && !intel_syntax
)
3859 as_warn (_("skipping prefixes on this instruction"));
3861 /* 1 opcode; 2 segment; offset */
3862 p
= frag_more (prefix
+ 1 + 2 + size
);
3864 if (i
.prefix
[DATA_PREFIX
] != 0)
3865 *p
++ = DATA_PREFIX_OPCODE
;
3867 if (i
.prefix
[REX_PREFIX
] != 0)
3868 *p
++ = i
.prefix
[REX_PREFIX
];
3870 *p
++ = i
.tm
.base_opcode
;
3871 if (i
.op
[1].imms
->X_op
== O_constant
)
3873 offsetT n
= i
.op
[1].imms
->X_add_number
;
3876 && !fits_in_unsigned_word (n
)
3877 && !fits_in_signed_word (n
))
3879 as_bad (_("16-bit jump out of range"));
3882 md_number_to_chars (p
, n
, size
);
3885 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
3886 i
.op
[1].imms
, 0, reloc (size
, 0, 0, i
.reloc
[1]));
3887 if (i
.op
[0].imms
->X_op
!= O_constant
)
3888 as_bad (_("can't handle non absolute segment in `%s'"),
3890 md_number_to_chars (p
+ size
, (valueT
) i
.op
[0].imms
->X_add_number
, 2);
3896 fragS
*insn_start_frag
;
3897 offsetT insn_start_off
;
3899 /* Tie dwarf2 debug info to the address at the start of the insn.
3900 We can't do this after the insn has been output as the current
3901 frag may have been closed off. eg. by frag_var. */
3902 dwarf2_emit_insn (0);
3904 insn_start_frag
= frag_now
;
3905 insn_start_off
= frag_now_fix ();
3908 if (i
.tm
.opcode_modifier
& Jump
)
3910 else if (i
.tm
.opcode_modifier
& (JumpByte
| JumpDword
))
3912 else if (i
.tm
.opcode_modifier
& JumpInterSegment
)
3913 output_interseg_jump ();
3916 /* Output normal instructions here. */
3919 unsigned int prefix
;
3921 /* All opcodes on i386 have either 1 or 2 bytes. Supplemental
3922 Streaming SIMD extensions 3 Instructions have 3 bytes. We may
3923 use one more higher byte to specify a prefix the instruction
3925 if ((i
.tm
.cpu_flags
& CpuSSSE3
) != 0)
3927 if (i
.tm
.base_opcode
& 0xff000000)
3929 prefix
= (i
.tm
.base_opcode
>> 24) & 0xff;
3933 else if ((i
.tm
.base_opcode
& 0xff0000) != 0)
3935 prefix
= (i
.tm
.base_opcode
>> 16) & 0xff;
3936 if ((i
.tm
.cpu_flags
& CpuPadLock
) != 0)
3939 if (prefix
!= REPE_PREFIX_OPCODE
3940 || i
.prefix
[LOCKREP_PREFIX
] != REPE_PREFIX_OPCODE
)
3941 add_prefix (prefix
);
3944 add_prefix (prefix
);
3947 /* The prefix bytes. */
3949 q
< i
.prefix
+ sizeof (i
.prefix
) / sizeof (i
.prefix
[0]);
3955 md_number_to_chars (p
, (valueT
) *q
, 1);
3959 /* Now the opcode; be careful about word order here! */
3960 if (fits_in_unsigned_byte (i
.tm
.base_opcode
))
3962 FRAG_APPEND_1_CHAR (i
.tm
.base_opcode
);
3966 if ((i
.tm
.cpu_flags
& CpuSSSE3
) != 0)
3969 *p
++ = (i
.tm
.base_opcode
>> 16) & 0xff;
3974 /* Put out high byte first: can't use md_number_to_chars! */
3975 *p
++ = (i
.tm
.base_opcode
>> 8) & 0xff;
3976 *p
= i
.tm
.base_opcode
& 0xff;
3979 /* Now the modrm byte and sib byte (if present). */
3980 if (i
.tm
.opcode_modifier
& Modrm
)
3983 md_number_to_chars (p
,
3984 (valueT
) (i
.rm
.regmem
<< 0
3988 /* If i.rm.regmem == ESP (4)
3989 && i.rm.mode != (Register mode)
3991 ==> need second modrm byte. */
3992 if (i
.rm
.regmem
== ESCAPE_TO_TWO_BYTE_ADDRESSING
3994 && !(i
.base_reg
&& (i
.base_reg
->reg_type
& Reg16
) != 0))
3997 md_number_to_chars (p
,
3998 (valueT
) (i
.sib
.base
<< 0
4000 | i
.sib
.scale
<< 6),
4005 if (i
.disp_operands
)
4006 output_disp (insn_start_frag
, insn_start_off
);
4009 output_imm (insn_start_frag
, insn_start_off
);
4015 pi ("" /*line*/, &i
);
4017 #endif /* DEBUG386 */
4021 output_disp (fragS
*insn_start_frag
, offsetT insn_start_off
)
4026 for (n
= 0; n
< i
.operands
; n
++)
4028 if (i
.types
[n
] & Disp
)
4030 if (i
.op
[n
].disps
->X_op
== O_constant
)
4036 if (i
.types
[n
] & (Disp8
| Disp16
| Disp64
))
4039 if (i
.types
[n
] & Disp8
)
4041 if (i
.types
[n
] & Disp64
)
4044 val
= offset_in_range (i
.op
[n
].disps
->X_add_number
,
4046 p
= frag_more (size
);
4047 md_number_to_chars (p
, val
, size
);
4051 enum bfd_reloc_code_real reloc_type
;
4054 int pcrel
= (i
.flags
[n
] & Operand_PCrel
) != 0;
4056 /* The PC relative address is computed relative
4057 to the instruction boundary, so in case immediate
4058 fields follows, we need to adjust the value. */
4059 if (pcrel
&& i
.imm_operands
)
4064 for (n1
= 0; n1
< i
.operands
; n1
++)
4065 if (i
.types
[n1
] & Imm
)
4067 if (i
.types
[n1
] & (Imm8
| Imm8S
| Imm16
| Imm64
))
4070 if (i
.types
[n1
] & (Imm8
| Imm8S
))
4072 if (i
.types
[n1
] & Imm64
)
4077 /* We should find the immediate. */
4078 if (n1
== i
.operands
)
4080 i
.op
[n
].disps
->X_add_number
-= imm_size
;
4083 if (i
.types
[n
] & Disp32S
)
4086 if (i
.types
[n
] & (Disp16
| Disp64
))
4089 if (i
.types
[n
] & Disp64
)
4093 p
= frag_more (size
);
4094 reloc_type
= reloc (size
, pcrel
, sign
, i
.reloc
[n
]);
4096 && GOT_symbol
== i
.op
[n
].disps
->X_add_symbol
4097 && (((reloc_type
== BFD_RELOC_32
4098 || reloc_type
== BFD_RELOC_X86_64_32S
4099 || (reloc_type
== BFD_RELOC_64
4101 && (i
.op
[n
].disps
->X_op
== O_symbol
4102 || (i
.op
[n
].disps
->X_op
== O_add
4103 && ((symbol_get_value_expression
4104 (i
.op
[n
].disps
->X_op_symbol
)->X_op
)
4106 || reloc_type
== BFD_RELOC_32_PCREL
))
4110 if (insn_start_frag
== frag_now
)
4111 add
= (p
- frag_now
->fr_literal
) - insn_start_off
;
4116 add
= insn_start_frag
->fr_fix
- insn_start_off
;
4117 for (fr
= insn_start_frag
->fr_next
;
4118 fr
&& fr
!= frag_now
; fr
= fr
->fr_next
)
4120 add
+= p
- frag_now
->fr_literal
;
4125 reloc_type
= BFD_RELOC_386_GOTPC
;
4126 i
.op
[n
].imms
->X_add_number
+= add
;
4128 else if (reloc_type
== BFD_RELOC_64
)
4129 reloc_type
= BFD_RELOC_X86_64_GOTPC64
;
4131 /* Don't do the adjustment for x86-64, as there
4132 the pcrel addressing is relative to the _next_
4133 insn, and that is taken care of in other code. */
4134 reloc_type
= BFD_RELOC_X86_64_GOTPC32
;
4136 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
4137 i
.op
[n
].disps
, pcrel
, reloc_type
);
4144 output_imm (fragS
*insn_start_frag
, offsetT insn_start_off
)
4149 for (n
= 0; n
< i
.operands
; n
++)
4151 if (i
.types
[n
] & Imm
)
4153 if (i
.op
[n
].imms
->X_op
== O_constant
)
4159 if (i
.types
[n
] & (Imm8
| Imm8S
| Imm16
| Imm64
))
4162 if (i
.types
[n
] & (Imm8
| Imm8S
))
4164 else if (i
.types
[n
] & Imm64
)
4167 val
= offset_in_range (i
.op
[n
].imms
->X_add_number
,
4169 p
= frag_more (size
);
4170 md_number_to_chars (p
, val
, size
);
4174 /* Not absolute_section.
4175 Need a 32-bit fixup (don't support 8bit
4176 non-absolute imms). Try to support other
4178 enum bfd_reloc_code_real reloc_type
;
4182 if ((i
.types
[n
] & (Imm32S
))
4183 && (i
.suffix
== QWORD_MNEM_SUFFIX
4184 || (!i
.suffix
&& (i
.tm
.opcode_modifier
& No_lSuf
))))
4186 if (i
.types
[n
] & (Imm8
| Imm8S
| Imm16
| Imm64
))
4189 if (i
.types
[n
] & (Imm8
| Imm8S
))
4191 if (i
.types
[n
] & Imm64
)
4195 p
= frag_more (size
);
4196 reloc_type
= reloc (size
, 0, sign
, i
.reloc
[n
]);
4198 /* This is tough to explain. We end up with this one if we
4199 * have operands that look like
4200 * "_GLOBAL_OFFSET_TABLE_+[.-.L284]". The goal here is to
4201 * obtain the absolute address of the GOT, and it is strongly
4202 * preferable from a performance point of view to avoid using
4203 * a runtime relocation for this. The actual sequence of
4204 * instructions often look something like:
4209 * addl $_GLOBAL_OFFSET_TABLE_+[.-.L66],%ebx
4211 * The call and pop essentially return the absolute address
4212 * of the label .L66 and store it in %ebx. The linker itself
4213 * will ultimately change the first operand of the addl so
4214 * that %ebx points to the GOT, but to keep things simple, the
4215 * .o file must have this operand set so that it generates not
4216 * the absolute address of .L66, but the absolute address of
4217 * itself. This allows the linker itself simply treat a GOTPC
4218 * relocation as asking for a pcrel offset to the GOT to be
4219 * added in, and the addend of the relocation is stored in the
4220 * operand field for the instruction itself.
4222 * Our job here is to fix the operand so that it would add
4223 * the correct offset so that %ebx would point to itself. The
4224 * thing that is tricky is that .-.L66 will point to the
4225 * beginning of the instruction, so we need to further modify
4226 * the operand so that it will point to itself. There are
4227 * other cases where you have something like:
4229 * .long $_GLOBAL_OFFSET_TABLE_+[.-.L66]
4231 * and here no correction would be required. Internally in
4232 * the assembler we treat operands of this form as not being
4233 * pcrel since the '.' is explicitly mentioned, and I wonder
4234 * whether it would simplify matters to do it this way. Who
4235 * knows. In earlier versions of the PIC patches, the
4236 * pcrel_adjust field was used to store the correction, but
4237 * since the expression is not pcrel, I felt it would be
4238 * confusing to do it this way. */
4240 if ((reloc_type
== BFD_RELOC_32
4241 || reloc_type
== BFD_RELOC_X86_64_32S
4242 || reloc_type
== BFD_RELOC_64
)
4244 && GOT_symbol
== i
.op
[n
].imms
->X_add_symbol
4245 && (i
.op
[n
].imms
->X_op
== O_symbol
4246 || (i
.op
[n
].imms
->X_op
== O_add
4247 && ((symbol_get_value_expression
4248 (i
.op
[n
].imms
->X_op_symbol
)->X_op
)
4253 if (insn_start_frag
== frag_now
)
4254 add
= (p
- frag_now
->fr_literal
) - insn_start_off
;
4259 add
= insn_start_frag
->fr_fix
- insn_start_off
;
4260 for (fr
= insn_start_frag
->fr_next
;
4261 fr
&& fr
!= frag_now
; fr
= fr
->fr_next
)
4263 add
+= p
- frag_now
->fr_literal
;
4267 reloc_type
= BFD_RELOC_386_GOTPC
;
4269 reloc_type
= BFD_RELOC_X86_64_GOTPC32
;
4271 reloc_type
= BFD_RELOC_X86_64_GOTPC64
;
4272 i
.op
[n
].imms
->X_add_number
+= add
;
4274 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, size
,
4275 i
.op
[n
].imms
, 0, reloc_type
);
4281 /* x86_cons_fix_new is called via the expression parsing code when a
4282 reloc is needed. We use this hook to get the correct .got reloc. */
4283 static enum bfd_reloc_code_real got_reloc
= NO_RELOC
;
4284 static int cons_sign
= -1;
4287 x86_cons_fix_new (fragS
*frag
,
4292 enum bfd_reloc_code_real r
= reloc (len
, 0, cons_sign
, got_reloc
);
4294 got_reloc
= NO_RELOC
;
4297 if (exp
->X_op
== O_secrel
)
4299 exp
->X_op
= O_symbol
;
4300 r
= BFD_RELOC_32_SECREL
;
4304 fix_new_exp (frag
, off
, len
, exp
, 0, r
);
4307 #if (!defined (OBJ_ELF) && !defined (OBJ_MAYBE_ELF)) || defined (LEX_AT)
4308 # define lex_got(reloc, adjust, types) NULL
4310 /* Parse operands of the form
4311 <symbol>@GOTOFF+<nnn>
4312 and similar .plt or .got references.
4314 If we find one, set up the correct relocation in RELOC and copy the
4315 input string, minus the `@GOTOFF' into a malloc'd buffer for
4316 parsing by the calling routine. Return this buffer, and if ADJUST
4317 is non-null set it to the length of the string we removed from the
4318 input line. Otherwise return NULL. */
4320 lex_got (enum bfd_reloc_code_real
*reloc
,
4322 unsigned int *types
)
4324 /* Some of the relocations depend on the size of what field is to
4325 be relocated. But in our callers i386_immediate and i386_displacement
4326 we don't yet know the operand size (this will be set by insn
4327 matching). Hence we record the word32 relocation here,
4328 and adjust the reloc according to the real size in reloc(). */
4329 static const struct {
4331 const enum bfd_reloc_code_real rel
[2];
4332 const unsigned int types64
;
4334 { "PLTOFF", { 0, BFD_RELOC_X86_64_PLTOFF64
}, Imm64
},
4335 { "PLT", { BFD_RELOC_386_PLT32
, BFD_RELOC_X86_64_PLT32
}, Imm32
|Imm32S
|Disp32
},
4336 { "GOTPLT", { 0, BFD_RELOC_X86_64_GOTPLT64
}, Imm64
|Disp64
},
4337 { "GOTOFF", { BFD_RELOC_386_GOTOFF
, BFD_RELOC_X86_64_GOTOFF64
}, Imm64
|Disp64
},
4338 { "GOTPCREL", { 0, BFD_RELOC_X86_64_GOTPCREL
}, Imm32
|Imm32S
|Disp32
},
4339 { "TLSGD", { BFD_RELOC_386_TLS_GD
, BFD_RELOC_X86_64_TLSGD
}, Imm32
|Imm32S
|Disp32
},
4340 { "TLSLDM", { BFD_RELOC_386_TLS_LDM
, 0 }, 0 },
4341 { "TLSLD", { 0, BFD_RELOC_X86_64_TLSLD
}, Imm32
|Imm32S
|Disp32
},
4342 { "GOTTPOFF", { BFD_RELOC_386_TLS_IE_32
, BFD_RELOC_X86_64_GOTTPOFF
}, Imm32
|Imm32S
|Disp32
},
4343 { "TPOFF", { BFD_RELOC_386_TLS_LE_32
, BFD_RELOC_X86_64_TPOFF32
}, Imm32
|Imm32S
|Imm64
|Disp32
|Disp64
},
4344 { "NTPOFF", { BFD_RELOC_386_TLS_LE
, 0 }, 0 },
4345 { "DTPOFF", { BFD_RELOC_386_TLS_LDO_32
, BFD_RELOC_X86_64_DTPOFF32
}, Imm32
|Imm32S
|Imm64
|Disp32
|Disp64
},
4346 { "GOTNTPOFF",{ BFD_RELOC_386_TLS_GOTIE
, 0 }, 0 },
4347 { "INDNTPOFF",{ BFD_RELOC_386_TLS_IE
, 0 }, 0 },
4348 { "GOT", { BFD_RELOC_386_GOT32
, BFD_RELOC_X86_64_GOT32
}, Imm32
|Imm32S
|Disp32
|Imm64
},
4349 { "TLSDESC", { BFD_RELOC_386_TLS_GOTDESC
, BFD_RELOC_X86_64_GOTPC32_TLSDESC
}, Imm32
|Imm32S
|Disp32
},
4350 { "TLSCALL", { BFD_RELOC_386_TLS_DESC_CALL
, BFD_RELOC_X86_64_TLSDESC_CALL
}, Imm32
|Imm32S
|Disp32
}
4358 for (cp
= input_line_pointer
; *cp
!= '@'; cp
++)
4359 if (is_end_of_line
[(unsigned char) *cp
])
4362 for (j
= 0; j
< sizeof (gotrel
) / sizeof (gotrel
[0]); j
++)
4366 len
= strlen (gotrel
[j
].str
);
4367 if (strncasecmp (cp
+ 1, gotrel
[j
].str
, len
) == 0)
4369 if (gotrel
[j
].rel
[object_64bit
] != 0)
4372 char *tmpbuf
, *past_reloc
;
4374 *reloc
= gotrel
[j
].rel
[object_64bit
];
4380 if (flag_code
!= CODE_64BIT
)
4381 *types
= Imm32
|Disp32
;
4383 *types
= gotrel
[j
].types64
;
4386 if (GOT_symbol
== NULL
)
4387 GOT_symbol
= symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME
);
4389 /* Replace the relocation token with ' ', so that
4390 errors like foo@GOTOFF1 will be detected. */
4392 /* The length of the first part of our input line. */
4393 first
= cp
- input_line_pointer
;
4395 /* The second part goes from after the reloc token until
4396 (and including) an end_of_line char. Don't use strlen
4397 here as the end_of_line char may not be a NUL. */
4398 past_reloc
= cp
+ 1 + len
;
4399 for (cp
= past_reloc
; !is_end_of_line
[(unsigned char) *cp
++]; )
4401 second
= cp
- past_reloc
;
4403 /* Allocate and copy string. The trailing NUL shouldn't
4404 be necessary, but be safe. */
4405 tmpbuf
= xmalloc (first
+ second
+ 2);
4406 memcpy (tmpbuf
, input_line_pointer
, first
);
4407 tmpbuf
[first
] = ' ';
4408 memcpy (tmpbuf
+ first
+ 1, past_reloc
, second
);
4409 tmpbuf
[first
+ second
+ 1] = '\0';
4413 as_bad (_("@%s reloc is not supported with %d-bit output format"),
4414 gotrel
[j
].str
, 1 << (5 + object_64bit
));
4419 /* Might be a symbol version string. Don't as_bad here. */
4424 x86_cons (exp
, size
)
4428 if (size
== 4 || (object_64bit
&& size
== 8))
4430 /* Handle @GOTOFF and the like in an expression. */
4432 char *gotfree_input_line
;
4435 save
= input_line_pointer
;
4436 gotfree_input_line
= lex_got (&got_reloc
, &adjust
, NULL
);
4437 if (gotfree_input_line
)
4438 input_line_pointer
= gotfree_input_line
;
4442 if (gotfree_input_line
)
4444 /* expression () has merrily parsed up to the end of line,
4445 or a comma - in the wrong buffer. Transfer how far
4446 input_line_pointer has moved to the right buffer. */
4447 input_line_pointer
= (save
4448 + (input_line_pointer
- gotfree_input_line
)
4450 free (gotfree_input_line
);
4458 static void signed_cons (int size
)
4460 if (flag_code
== CODE_64BIT
)
4468 pe_directive_secrel (dummy
)
4469 int dummy ATTRIBUTE_UNUSED
;
4476 if (exp
.X_op
== O_symbol
)
4477 exp
.X_op
= O_secrel
;
4479 emit_expr (&exp
, 4);
4481 while (*input_line_pointer
++ == ',');
4483 input_line_pointer
--;
4484 demand_empty_rest_of_line ();
4488 static int i386_immediate
PARAMS ((char *));
4491 i386_immediate (imm_start
)
4494 char *save_input_line_pointer
;
4495 char *gotfree_input_line
;
4498 unsigned int types
= ~0U;
4500 if (i
.imm_operands
== MAX_IMMEDIATE_OPERANDS
)
4502 as_bad (_("only 1 or 2 immediate operands are allowed"));
4506 exp
= &im_expressions
[i
.imm_operands
++];
4507 i
.op
[this_operand
].imms
= exp
;
4509 if (is_space_char (*imm_start
))
4512 save_input_line_pointer
= input_line_pointer
;
4513 input_line_pointer
= imm_start
;
4515 gotfree_input_line
= lex_got (&i
.reloc
[this_operand
], NULL
, &types
);
4516 if (gotfree_input_line
)
4517 input_line_pointer
= gotfree_input_line
;
4519 exp_seg
= expression (exp
);
4522 if (*input_line_pointer
)
4523 as_bad (_("junk `%s' after expression"), input_line_pointer
);
4525 input_line_pointer
= save_input_line_pointer
;
4526 if (gotfree_input_line
)
4527 free (gotfree_input_line
);
4529 if (exp
->X_op
== O_absent
|| exp
->X_op
== O_big
)
4531 /* Missing or bad expr becomes absolute 0. */
4532 as_bad (_("missing or invalid immediate expression `%s' taken as 0"),
4534 exp
->X_op
= O_constant
;
4535 exp
->X_add_number
= 0;
4536 exp
->X_add_symbol
= (symbolS
*) 0;
4537 exp
->X_op_symbol
= (symbolS
*) 0;
4539 else if (exp
->X_op
== O_constant
)
4541 /* Size it properly later. */
4542 i
.types
[this_operand
] |= Imm64
;
4543 /* If BFD64, sign extend val. */
4544 if (!use_rela_relocations
)
4545 if ((exp
->X_add_number
& ~(((addressT
) 2 << 31) - 1)) == 0)
4546 exp
->X_add_number
= (exp
->X_add_number
^ ((addressT
) 1 << 31)) - ((addressT
) 1 << 31);
4548 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
4549 else if (OUTPUT_FLAVOR
== bfd_target_aout_flavour
4550 && exp_seg
!= absolute_section
4551 && exp_seg
!= text_section
4552 && exp_seg
!= data_section
4553 && exp_seg
!= bss_section
4554 && exp_seg
!= undefined_section
4555 && !bfd_is_com_section (exp_seg
))
4557 as_bad (_("unimplemented segment %s in operand"), exp_seg
->name
);
4561 else if (!intel_syntax
&& exp
->X_op
== O_register
)
4563 as_bad (_("illegal immediate register operand %s"), imm_start
);
4568 /* This is an address. The size of the address will be
4569 determined later, depending on destination register,
4570 suffix, or the default for the section. */
4571 i
.types
[this_operand
] |= Imm8
| Imm16
| Imm32
| Imm32S
| Imm64
;
4572 i
.types
[this_operand
] &= types
;
4578 static char *i386_scale
PARAMS ((char *));
4585 char *save
= input_line_pointer
;
4587 input_line_pointer
= scale
;
4588 val
= get_absolute_expression ();
4593 i
.log2_scale_factor
= 0;
4596 i
.log2_scale_factor
= 1;
4599 i
.log2_scale_factor
= 2;
4602 i
.log2_scale_factor
= 3;
4606 char sep
= *input_line_pointer
;
4608 *input_line_pointer
= '\0';
4609 as_bad (_("expecting scale factor of 1, 2, 4, or 8: got `%s'"),
4611 *input_line_pointer
= sep
;
4612 input_line_pointer
= save
;
4616 if (i
.log2_scale_factor
!= 0 && i
.index_reg
== 0)
4618 as_warn (_("scale factor of %d without an index register"),
4619 1 << i
.log2_scale_factor
);
4620 #if SCALE1_WHEN_NO_INDEX
4621 i
.log2_scale_factor
= 0;
4624 scale
= input_line_pointer
;
4625 input_line_pointer
= save
;
4629 static int i386_displacement
PARAMS ((char *, char *));
4632 i386_displacement (disp_start
, disp_end
)
4638 char *save_input_line_pointer
;
4639 char *gotfree_input_line
;
4640 int bigdisp
, override
;
4641 unsigned int types
= Disp
;
4643 if ((i
.types
[this_operand
] & JumpAbsolute
)
4644 || !(current_templates
->start
->opcode_modifier
& (Jump
| JumpDword
)))
4647 override
= (i
.prefix
[ADDR_PREFIX
] != 0);
4651 /* For PC-relative branches, the width of the displacement
4652 is dependent upon data size, not address size. */
4654 override
= (i
.prefix
[DATA_PREFIX
] != 0);
4656 if (flag_code
== CODE_64BIT
)
4659 bigdisp
= ((override
|| i
.suffix
== WORD_MNEM_SUFFIX
)
4661 : Disp32S
| Disp32
);
4663 bigdisp
= Disp64
| Disp32S
| Disp32
;
4670 override
= (i
.suffix
== (flag_code
!= CODE_16BIT
4672 : LONG_MNEM_SUFFIX
));
4675 if ((flag_code
== CODE_16BIT
) ^ override
)
4678 i
.types
[this_operand
] |= bigdisp
;
4680 exp
= &disp_expressions
[i
.disp_operands
];
4681 i
.op
[this_operand
].disps
= exp
;
4683 save_input_line_pointer
= input_line_pointer
;
4684 input_line_pointer
= disp_start
;
4685 END_STRING_AND_SAVE (disp_end
);
4687 #ifndef GCC_ASM_O_HACK
4688 #define GCC_ASM_O_HACK 0
4691 END_STRING_AND_SAVE (disp_end
+ 1);
4692 if ((i
.types
[this_operand
] & BaseIndex
) != 0
4693 && displacement_string_end
[-1] == '+')
4695 /* This hack is to avoid a warning when using the "o"
4696 constraint within gcc asm statements.
4699 #define _set_tssldt_desc(n,addr,limit,type) \
4700 __asm__ __volatile__ ( \
4702 "movw %w1,2+%0\n\t" \
4704 "movb %b1,4+%0\n\t" \
4705 "movb %4,5+%0\n\t" \
4706 "movb $0,6+%0\n\t" \
4707 "movb %h1,7+%0\n\t" \
4709 : "=o"(*(n)) : "q" (addr), "ri"(limit), "i"(type))
4711 This works great except that the output assembler ends
4712 up looking a bit weird if it turns out that there is
4713 no offset. You end up producing code that looks like:
4726 So here we provide the missing zero. */
4728 *displacement_string_end
= '0';
4731 gotfree_input_line
= lex_got (&i
.reloc
[this_operand
], NULL
, &types
);
4732 if (gotfree_input_line
)
4733 input_line_pointer
= gotfree_input_line
;
4735 exp_seg
= expression (exp
);
4738 if (*input_line_pointer
)
4739 as_bad (_("junk `%s' after expression"), input_line_pointer
);
4741 RESTORE_END_STRING (disp_end
+ 1);
4743 RESTORE_END_STRING (disp_end
);
4744 input_line_pointer
= save_input_line_pointer
;
4745 if (gotfree_input_line
)
4746 free (gotfree_input_line
);
4748 /* We do this to make sure that the section symbol is in
4749 the symbol table. We will ultimately change the relocation
4750 to be relative to the beginning of the section. */
4751 if (i
.reloc
[this_operand
] == BFD_RELOC_386_GOTOFF
4752 || i
.reloc
[this_operand
] == BFD_RELOC_X86_64_GOTPCREL
4753 || i
.reloc
[this_operand
] == BFD_RELOC_X86_64_GOTOFF64
)
4755 if (exp
->X_op
!= O_symbol
)
4757 as_bad (_("bad expression used with @%s"),
4758 (i
.reloc
[this_operand
] == BFD_RELOC_X86_64_GOTPCREL
4764 if (S_IS_LOCAL (exp
->X_add_symbol
)
4765 && S_GET_SEGMENT (exp
->X_add_symbol
) != undefined_section
)
4766 section_symbol (S_GET_SEGMENT (exp
->X_add_symbol
));
4767 exp
->X_op
= O_subtract
;
4768 exp
->X_op_symbol
= GOT_symbol
;
4769 if (i
.reloc
[this_operand
] == BFD_RELOC_X86_64_GOTPCREL
)
4770 i
.reloc
[this_operand
] = BFD_RELOC_32_PCREL
;
4771 else if (i
.reloc
[this_operand
] == BFD_RELOC_X86_64_GOTOFF64
)
4772 i
.reloc
[this_operand
] = BFD_RELOC_64
;
4774 i
.reloc
[this_operand
] = BFD_RELOC_32
;
4777 if (exp
->X_op
== O_absent
|| exp
->X_op
== O_big
)
4779 /* Missing or bad expr becomes absolute 0. */
4780 as_bad (_("missing or invalid displacement expression `%s' taken as 0"),
4782 exp
->X_op
= O_constant
;
4783 exp
->X_add_number
= 0;
4784 exp
->X_add_symbol
= (symbolS
*) 0;
4785 exp
->X_op_symbol
= (symbolS
*) 0;
4788 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
4789 if (exp
->X_op
!= O_constant
4790 && OUTPUT_FLAVOR
== bfd_target_aout_flavour
4791 && exp_seg
!= absolute_section
4792 && exp_seg
!= text_section
4793 && exp_seg
!= data_section
4794 && exp_seg
!= bss_section
4795 && exp_seg
!= undefined_section
4796 && !bfd_is_com_section (exp_seg
))
4798 as_bad (_("unimplemented segment %s in operand"), exp_seg
->name
);
4803 if (!(i
.types
[this_operand
] & ~Disp
))
4804 i
.types
[this_operand
] &= types
;
4809 static int i386_index_check
PARAMS ((const char *));
4811 /* Make sure the memory operand we've been dealt is valid.
4812 Return 1 on success, 0 on a failure. */
4815 i386_index_check (operand_string
)
4816 const char *operand_string
;
4819 #if INFER_ADDR_PREFIX
4825 if ((current_templates
->start
->cpu_flags
& CpuSVME
)
4826 && current_templates
->end
[-1].operand_types
[0] == AnyMem
)
4828 /* Memory operands of SVME insns are special in that they only allow
4829 rAX as their memory address and ignore any segment override. */
4832 /* SKINIT is even more restrictive: it always requires EAX. */
4833 if (strcmp (current_templates
->start
->name
, "skinit") == 0)
4835 else if (flag_code
== CODE_64BIT
)
4836 RegXX
= i
.prefix
[ADDR_PREFIX
] == 0 ? Reg64
: Reg32
;
4838 RegXX
= ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[ADDR_PREFIX
] != 0)
4842 || !(i
.base_reg
->reg_type
& Acc
)
4843 || !(i
.base_reg
->reg_type
& RegXX
)
4845 || (i
.types
[0] & Disp
))
4848 else if (flag_code
== CODE_64BIT
)
4850 unsigned RegXX
= (i
.prefix
[ADDR_PREFIX
] == 0 ? Reg64
: Reg32
);
4853 && ((i
.base_reg
->reg_type
& RegXX
) == 0)
4854 && (i
.base_reg
->reg_type
!= BaseIndex
4857 && ((i
.index_reg
->reg_type
& (RegXX
| BaseIndex
))
4858 != (RegXX
| BaseIndex
))))
4863 if ((flag_code
== CODE_16BIT
) ^ (i
.prefix
[ADDR_PREFIX
] != 0))
4867 && ((i
.base_reg
->reg_type
& (Reg16
| BaseIndex
| RegRex
))
4868 != (Reg16
| BaseIndex
)))
4870 && (((i
.index_reg
->reg_type
& (Reg16
| BaseIndex
))
4871 != (Reg16
| BaseIndex
))
4873 && i
.base_reg
->reg_num
< 6
4874 && i
.index_reg
->reg_num
>= 6
4875 && i
.log2_scale_factor
== 0))))
4882 && (i
.base_reg
->reg_type
& (Reg32
| RegRex
)) != Reg32
)
4884 && ((i
.index_reg
->reg_type
& (Reg32
| BaseIndex
| RegRex
))
4885 != (Reg32
| BaseIndex
))))
4891 #if INFER_ADDR_PREFIX
4892 if (i
.prefix
[ADDR_PREFIX
] == 0)
4894 i
.prefix
[ADDR_PREFIX
] = ADDR_PREFIX_OPCODE
;
4896 /* Change the size of any displacement too. At most one of
4897 Disp16 or Disp32 is set.
4898 FIXME. There doesn't seem to be any real need for separate
4899 Disp16 and Disp32 flags. The same goes for Imm16 and Imm32.
4900 Removing them would probably clean up the code quite a lot. */
4901 if (flag_code
!= CODE_64BIT
&& (i
.types
[this_operand
] & (Disp16
| Disp32
)))
4902 i
.types
[this_operand
] ^= (Disp16
| Disp32
);
4907 as_bad (_("`%s' is not a valid base/index expression"),
4911 as_bad (_("`%s' is not a valid %s bit base/index expression"),
4913 flag_code_names
[flag_code
]);
4918 /* Parse OPERAND_STRING into the i386_insn structure I. Returns non-zero
4922 i386_operand (operand_string
)
4923 char *operand_string
;
4927 char *op_string
= operand_string
;
4929 if (is_space_char (*op_string
))
4932 /* We check for an absolute prefix (differentiating,
4933 for example, 'jmp pc_relative_label' from 'jmp *absolute_label'. */
4934 if (*op_string
== ABSOLUTE_PREFIX
)
4937 if (is_space_char (*op_string
))
4939 i
.types
[this_operand
] |= JumpAbsolute
;
4942 /* Check if operand is a register. */
4943 if ((r
= parse_register (op_string
, &end_op
)) != NULL
)
4945 /* Check for a segment override by searching for ':' after a
4946 segment register. */
4948 if (is_space_char (*op_string
))
4950 if (*op_string
== ':' && (r
->reg_type
& (SReg2
| SReg3
)))
4955 i
.seg
[i
.mem_operands
] = &es
;
4958 i
.seg
[i
.mem_operands
] = &cs
;
4961 i
.seg
[i
.mem_operands
] = &ss
;
4964 i
.seg
[i
.mem_operands
] = &ds
;
4967 i
.seg
[i
.mem_operands
] = &fs
;
4970 i
.seg
[i
.mem_operands
] = &gs
;
4974 /* Skip the ':' and whitespace. */
4976 if (is_space_char (*op_string
))
4979 if (!is_digit_char (*op_string
)
4980 && !is_identifier_char (*op_string
)
4981 && *op_string
!= '('
4982 && *op_string
!= ABSOLUTE_PREFIX
)
4984 as_bad (_("bad memory operand `%s'"), op_string
);
4987 /* Handle case of %es:*foo. */
4988 if (*op_string
== ABSOLUTE_PREFIX
)
4991 if (is_space_char (*op_string
))
4993 i
.types
[this_operand
] |= JumpAbsolute
;
4995 goto do_memory_reference
;
4999 as_bad (_("junk `%s' after register"), op_string
);
5002 i
.types
[this_operand
] |= r
->reg_type
& ~BaseIndex
;
5003 i
.op
[this_operand
].regs
= r
;
5006 else if (*op_string
== REGISTER_PREFIX
)
5008 as_bad (_("bad register name `%s'"), op_string
);
5011 else if (*op_string
== IMMEDIATE_PREFIX
)
5014 if (i
.types
[this_operand
] & JumpAbsolute
)
5016 as_bad (_("immediate operand illegal with absolute jump"));
5019 if (!i386_immediate (op_string
))
5022 else if (is_digit_char (*op_string
)
5023 || is_identifier_char (*op_string
)
5024 || *op_string
== '(')
5026 /* This is a memory reference of some sort. */
5029 /* Start and end of displacement string expression (if found). */
5030 char *displacement_string_start
;
5031 char *displacement_string_end
;
5033 do_memory_reference
:
5034 if ((i
.mem_operands
== 1
5035 && (current_templates
->start
->opcode_modifier
& IsString
) == 0)
5036 || i
.mem_operands
== 2)
5038 as_bad (_("too many memory references for `%s'"),
5039 current_templates
->start
->name
);
5043 /* Check for base index form. We detect the base index form by
5044 looking for an ')' at the end of the operand, searching
5045 for the '(' matching it, and finding a REGISTER_PREFIX or ','
5047 base_string
= op_string
+ strlen (op_string
);
5050 if (is_space_char (*base_string
))
5053 /* If we only have a displacement, set-up for it to be parsed later. */
5054 displacement_string_start
= op_string
;
5055 displacement_string_end
= base_string
+ 1;
5057 if (*base_string
== ')')
5060 unsigned int parens_balanced
= 1;
5061 /* We've already checked that the number of left & right ()'s are
5062 equal, so this loop will not be infinite. */
5066 if (*base_string
== ')')
5068 if (*base_string
== '(')
5071 while (parens_balanced
);
5073 temp_string
= base_string
;
5075 /* Skip past '(' and whitespace. */
5077 if (is_space_char (*base_string
))
5080 if (*base_string
== ','
5081 || ((i
.base_reg
= parse_register (base_string
, &end_op
)) != NULL
))
5083 displacement_string_end
= temp_string
;
5085 i
.types
[this_operand
] |= BaseIndex
;
5089 base_string
= end_op
;
5090 if (is_space_char (*base_string
))
5094 /* There may be an index reg or scale factor here. */
5095 if (*base_string
== ',')
5098 if (is_space_char (*base_string
))
5101 if ((i
.index_reg
= parse_register (base_string
, &end_op
)) != NULL
)
5103 base_string
= end_op
;
5104 if (is_space_char (*base_string
))
5106 if (*base_string
== ',')
5109 if (is_space_char (*base_string
))
5112 else if (*base_string
!= ')')
5114 as_bad (_("expecting `,' or `)' after index register in `%s'"),
5119 else if (*base_string
== REGISTER_PREFIX
)
5121 as_bad (_("bad register name `%s'"), base_string
);
5125 /* Check for scale factor. */
5126 if (*base_string
!= ')')
5128 char *end_scale
= i386_scale (base_string
);
5133 base_string
= end_scale
;
5134 if (is_space_char (*base_string
))
5136 if (*base_string
!= ')')
5138 as_bad (_("expecting `)' after scale factor in `%s'"),
5143 else if (!i
.index_reg
)
5145 as_bad (_("expecting index register or scale factor after `,'; got '%c'"),
5150 else if (*base_string
!= ')')
5152 as_bad (_("expecting `,' or `)' after base register in `%s'"),
5157 else if (*base_string
== REGISTER_PREFIX
)
5159 as_bad (_("bad register name `%s'"), base_string
);
5164 /* If there's an expression beginning the operand, parse it,
5165 assuming displacement_string_start and
5166 displacement_string_end are meaningful. */
5167 if (displacement_string_start
!= displacement_string_end
)
5169 if (!i386_displacement (displacement_string_start
,
5170 displacement_string_end
))
5174 /* Special case for (%dx) while doing input/output op. */
5176 && i
.base_reg
->reg_type
== (Reg16
| InOutPortReg
)
5178 && i
.log2_scale_factor
== 0
5179 && i
.seg
[i
.mem_operands
] == 0
5180 && (i
.types
[this_operand
] & Disp
) == 0)
5182 i
.types
[this_operand
] = InOutPortReg
;
5186 if (i386_index_check (operand_string
) == 0)
5192 /* It's not a memory operand; argh! */
5193 as_bad (_("invalid char %s beginning operand %d `%s'"),
5194 output_invalid (*op_string
),
5199 return 1; /* Normal return. */
5202 /* md_estimate_size_before_relax()
5204 Called just before relax() for rs_machine_dependent frags. The x86
5205 assembler uses these frags to handle variable size jump
5208 Any symbol that is now undefined will not become defined.
5209 Return the correct fr_subtype in the frag.
5210 Return the initial "guess for variable size of frag" to caller.
5211 The guess is actually the growth beyond the fixed part. Whatever
5212 we do to grow the fixed or variable part contributes to our
5216 md_estimate_size_before_relax (fragP
, segment
)
5220 /* We've already got fragP->fr_subtype right; all we have to do is
5221 check for un-relaxable symbols. On an ELF system, we can't relax
5222 an externally visible symbol, because it may be overridden by a
5224 if (S_GET_SEGMENT (fragP
->fr_symbol
) != segment
5225 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5227 && (S_IS_EXTERNAL (fragP
->fr_symbol
)
5228 || S_IS_WEAK (fragP
->fr_symbol
)))
5232 /* Symbol is undefined in this segment, or we need to keep a
5233 reloc so that weak symbols can be overridden. */
5234 int size
= (fragP
->fr_subtype
& CODE16
) ? 2 : 4;
5235 enum bfd_reloc_code_real reloc_type
;
5236 unsigned char *opcode
;
5239 if (fragP
->fr_var
!= NO_RELOC
)
5240 reloc_type
= fragP
->fr_var
;
5242 reloc_type
= BFD_RELOC_16_PCREL
;
5244 reloc_type
= BFD_RELOC_32_PCREL
;
5246 old_fr_fix
= fragP
->fr_fix
;
5247 opcode
= (unsigned char *) fragP
->fr_opcode
;
5249 switch (TYPE_FROM_RELAX_STATE (fragP
->fr_subtype
))
5252 /* Make jmp (0xeb) a (d)word displacement jump. */
5254 fragP
->fr_fix
+= size
;
5255 fix_new (fragP
, old_fr_fix
, size
,
5257 fragP
->fr_offset
, 1,
5263 && (!no_cond_jump_promotion
|| fragP
->fr_var
!= NO_RELOC
))
5265 /* Negate the condition, and branch past an
5266 unconditional jump. */
5269 /* Insert an unconditional jump. */
5271 /* We added two extra opcode bytes, and have a two byte
5273 fragP
->fr_fix
+= 2 + 2;
5274 fix_new (fragP
, old_fr_fix
+ 2, 2,
5276 fragP
->fr_offset
, 1,
5283 if (no_cond_jump_promotion
&& fragP
->fr_var
== NO_RELOC
)
5288 fixP
= fix_new (fragP
, old_fr_fix
, 1,
5290 fragP
->fr_offset
, 1,
5292 fixP
->fx_signed
= 1;
5296 /* This changes the byte-displacement jump 0x7N
5297 to the (d)word-displacement jump 0x0f,0x8N. */
5298 opcode
[1] = opcode
[0] + 0x10;
5299 opcode
[0] = TWO_BYTE_OPCODE_ESCAPE
;
5300 /* We've added an opcode byte. */
5301 fragP
->fr_fix
+= 1 + size
;
5302 fix_new (fragP
, old_fr_fix
+ 1, size
,
5304 fragP
->fr_offset
, 1,
5309 BAD_CASE (fragP
->fr_subtype
);
5313 return fragP
->fr_fix
- old_fr_fix
;
5316 /* Guess size depending on current relax state. Initially the relax
5317 state will correspond to a short jump and we return 1, because
5318 the variable part of the frag (the branch offset) is one byte
5319 long. However, we can relax a section more than once and in that
5320 case we must either set fr_subtype back to the unrelaxed state,
5321 or return the value for the appropriate branch. */
5322 return md_relax_table
[fragP
->fr_subtype
].rlx_length
;
5325 /* Called after relax() is finished.
5327 In: Address of frag.
5328 fr_type == rs_machine_dependent.
5329 fr_subtype is what the address relaxed to.
5331 Out: Any fixSs and constants are set up.
5332 Caller will turn frag into a ".space 0". */
5335 md_convert_frag (abfd
, sec
, fragP
)
5336 bfd
*abfd ATTRIBUTE_UNUSED
;
5337 segT sec ATTRIBUTE_UNUSED
;
5340 unsigned char *opcode
;
5341 unsigned char *where_to_put_displacement
= NULL
;
5342 offsetT target_address
;
5343 offsetT opcode_address
;
5344 unsigned int extension
= 0;
5345 offsetT displacement_from_opcode_start
;
5347 opcode
= (unsigned char *) fragP
->fr_opcode
;
5349 /* Address we want to reach in file space. */
5350 target_address
= S_GET_VALUE (fragP
->fr_symbol
) + fragP
->fr_offset
;
5352 /* Address opcode resides at in file space. */
5353 opcode_address
= fragP
->fr_address
+ fragP
->fr_fix
;
5355 /* Displacement from opcode start to fill into instruction. */
5356 displacement_from_opcode_start
= target_address
- opcode_address
;
5358 if ((fragP
->fr_subtype
& BIG
) == 0)
5360 /* Don't have to change opcode. */
5361 extension
= 1; /* 1 opcode + 1 displacement */
5362 where_to_put_displacement
= &opcode
[1];
5366 if (no_cond_jump_promotion
5367 && TYPE_FROM_RELAX_STATE (fragP
->fr_subtype
) != UNCOND_JUMP
)
5368 as_warn_where (fragP
->fr_file
, fragP
->fr_line
, _("long jump required"));
5370 switch (fragP
->fr_subtype
)
5372 case ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG
):
5373 extension
= 4; /* 1 opcode + 4 displacement */
5375 where_to_put_displacement
= &opcode
[1];
5378 case ENCODE_RELAX_STATE (UNCOND_JUMP
, BIG16
):
5379 extension
= 2; /* 1 opcode + 2 displacement */
5381 where_to_put_displacement
= &opcode
[1];
5384 case ENCODE_RELAX_STATE (COND_JUMP
, BIG
):
5385 case ENCODE_RELAX_STATE (COND_JUMP86
, BIG
):
5386 extension
= 5; /* 2 opcode + 4 displacement */
5387 opcode
[1] = opcode
[0] + 0x10;
5388 opcode
[0] = TWO_BYTE_OPCODE_ESCAPE
;
5389 where_to_put_displacement
= &opcode
[2];
5392 case ENCODE_RELAX_STATE (COND_JUMP
, BIG16
):
5393 extension
= 3; /* 2 opcode + 2 displacement */
5394 opcode
[1] = opcode
[0] + 0x10;
5395 opcode
[0] = TWO_BYTE_OPCODE_ESCAPE
;
5396 where_to_put_displacement
= &opcode
[2];
5399 case ENCODE_RELAX_STATE (COND_JUMP86
, BIG16
):
5404 where_to_put_displacement
= &opcode
[3];
5408 BAD_CASE (fragP
->fr_subtype
);
5413 /* If size if less then four we are sure that the operand fits,
5414 but if it's 4, then it could be that the displacement is larger
5416 if (DISP_SIZE_FROM_RELAX_STATE (fragP
->fr_subtype
) == 4
5418 && ((addressT
) (displacement_from_opcode_start
- extension
5419 + ((addressT
) 1 << 31))
5420 > (((addressT
) 2 << 31) - 1)))
5422 as_bad_where (fragP
->fr_file
, fragP
->fr_line
,
5423 _("jump target out of range"));
5424 /* Make us emit 0. */
5425 displacement_from_opcode_start
= extension
;
5427 /* Now put displacement after opcode. */
5428 md_number_to_chars ((char *) where_to_put_displacement
,
5429 (valueT
) (displacement_from_opcode_start
- extension
),
5430 DISP_SIZE_FROM_RELAX_STATE (fragP
->fr_subtype
));
5431 fragP
->fr_fix
+= extension
;
5434 /* Size of byte displacement jmp. */
5435 int md_short_jump_size
= 2;
5437 /* Size of dword displacement jmp. */
5438 int md_long_jump_size
= 5;
5441 md_create_short_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
5443 addressT from_addr
, to_addr
;
5444 fragS
*frag ATTRIBUTE_UNUSED
;
5445 symbolS
*to_symbol ATTRIBUTE_UNUSED
;
5449 offset
= to_addr
- (from_addr
+ 2);
5450 /* Opcode for byte-disp jump. */
5451 md_number_to_chars (ptr
, (valueT
) 0xeb, 1);
5452 md_number_to_chars (ptr
+ 1, (valueT
) offset
, 1);
5456 md_create_long_jump (ptr
, from_addr
, to_addr
, frag
, to_symbol
)
5458 addressT from_addr
, to_addr
;
5459 fragS
*frag ATTRIBUTE_UNUSED
;
5460 symbolS
*to_symbol ATTRIBUTE_UNUSED
;
5464 offset
= to_addr
- (from_addr
+ 5);
5465 md_number_to_chars (ptr
, (valueT
) 0xe9, 1);
5466 md_number_to_chars (ptr
+ 1, (valueT
) offset
, 4);
5469 /* Apply a fixup (fixS) to segment data, once it has been determined
5470 by our caller that we have all the info we need to fix it up.
5472 On the 386, immediates, displacements, and data pointers are all in
5473 the same (little-endian) format, so we don't need to care about which
5477 md_apply_fix (fixP
, valP
, seg
)
5478 /* The fix we're to put in. */
5480 /* Pointer to the value of the bits. */
5482 /* Segment fix is from. */
5483 segT seg ATTRIBUTE_UNUSED
;
5485 char *p
= fixP
->fx_where
+ fixP
->fx_frag
->fr_literal
;
5486 valueT value
= *valP
;
5488 #if !defined (TE_Mach)
5491 switch (fixP
->fx_r_type
)
5497 fixP
->fx_r_type
= BFD_RELOC_64_PCREL
;
5500 case BFD_RELOC_X86_64_32S
:
5501 fixP
->fx_r_type
= BFD_RELOC_32_PCREL
;
5504 fixP
->fx_r_type
= BFD_RELOC_16_PCREL
;
5507 fixP
->fx_r_type
= BFD_RELOC_8_PCREL
;
5512 if (fixP
->fx_addsy
!= NULL
5513 && (fixP
->fx_r_type
== BFD_RELOC_32_PCREL
5514 || fixP
->fx_r_type
== BFD_RELOC_64_PCREL
5515 || fixP
->fx_r_type
== BFD_RELOC_16_PCREL
5516 || fixP
->fx_r_type
== BFD_RELOC_8_PCREL
)
5517 && !use_rela_relocations
)
5519 /* This is a hack. There should be a better way to handle this.
5520 This covers for the fact that bfd_install_relocation will
5521 subtract the current location (for partial_inplace, PC relative
5522 relocations); see more below. */
5526 || OUTPUT_FLAVOR
== bfd_target_coff_flavour
5529 value
+= fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
5531 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5534 segT sym_seg
= S_GET_SEGMENT (fixP
->fx_addsy
);
5537 || (symbol_section_p (fixP
->fx_addsy
)
5538 && sym_seg
!= absolute_section
))
5539 && !generic_force_reloc (fixP
))
5541 /* Yes, we add the values in twice. This is because
5542 bfd_install_relocation subtracts them out again. I think
5543 bfd_install_relocation is broken, but I don't dare change
5545 value
+= fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
5549 #if defined (OBJ_COFF) && defined (TE_PE)
5550 /* For some reason, the PE format does not store a
5551 section address offset for a PC relative symbol. */
5552 if (S_GET_SEGMENT (fixP
->fx_addsy
) != seg
5553 || S_IS_WEAK (fixP
->fx_addsy
))
5554 value
+= md_pcrel_from (fixP
);
5558 /* Fix a few things - the dynamic linker expects certain values here,
5559 and we must not disappoint it. */
5560 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5561 if (IS_ELF
&& fixP
->fx_addsy
)
5562 switch (fixP
->fx_r_type
)
5564 case BFD_RELOC_386_PLT32
:
5565 case BFD_RELOC_X86_64_PLT32
:
5566 /* Make the jump instruction point to the address of the operand. At
5567 runtime we merely add the offset to the actual PLT entry. */
5571 case BFD_RELOC_386_TLS_GD
:
5572 case BFD_RELOC_386_TLS_LDM
:
5573 case BFD_RELOC_386_TLS_IE_32
:
5574 case BFD_RELOC_386_TLS_IE
:
5575 case BFD_RELOC_386_TLS_GOTIE
:
5576 case BFD_RELOC_386_TLS_GOTDESC
:
5577 case BFD_RELOC_X86_64_TLSGD
:
5578 case BFD_RELOC_X86_64_TLSLD
:
5579 case BFD_RELOC_X86_64_GOTTPOFF
:
5580 case BFD_RELOC_X86_64_GOTPC32_TLSDESC
:
5581 value
= 0; /* Fully resolved at runtime. No addend. */
5583 case BFD_RELOC_386_TLS_LE
:
5584 case BFD_RELOC_386_TLS_LDO_32
:
5585 case BFD_RELOC_386_TLS_LE_32
:
5586 case BFD_RELOC_X86_64_DTPOFF32
:
5587 case BFD_RELOC_X86_64_DTPOFF64
:
5588 case BFD_RELOC_X86_64_TPOFF32
:
5589 case BFD_RELOC_X86_64_TPOFF64
:
5590 S_SET_THREAD_LOCAL (fixP
->fx_addsy
);
5593 case BFD_RELOC_386_TLS_DESC_CALL
:
5594 case BFD_RELOC_X86_64_TLSDESC_CALL
:
5595 value
= 0; /* Fully resolved at runtime. No addend. */
5596 S_SET_THREAD_LOCAL (fixP
->fx_addsy
);
5600 case BFD_RELOC_386_GOT32
:
5601 case BFD_RELOC_X86_64_GOT32
:
5602 value
= 0; /* Fully resolved at runtime. No addend. */
5605 case BFD_RELOC_VTABLE_INHERIT
:
5606 case BFD_RELOC_VTABLE_ENTRY
:
5613 #endif /* defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) */
5615 #endif /* !defined (TE_Mach) */
5617 /* Are we finished with this relocation now? */
5618 if (fixP
->fx_addsy
== NULL
)
5620 else if (use_rela_relocations
)
5622 fixP
->fx_no_overflow
= 1;
5623 /* Remember value for tc_gen_reloc. */
5624 fixP
->fx_addnumber
= value
;
5628 md_number_to_chars (p
, value
, fixP
->fx_size
);
5631 #define MAX_LITTLENUMS 6
5633 /* Turn the string pointed to by litP into a floating point constant
5634 of type TYPE, and emit the appropriate bytes. The number of
5635 LITTLENUMS emitted is stored in *SIZEP. An error message is
5636 returned, or NULL on OK. */
5639 md_atof (type
, litP
, sizeP
)
5645 LITTLENUM_TYPE words
[MAX_LITTLENUMS
];
5646 LITTLENUM_TYPE
*wordP
;
5668 return _("Bad call to md_atof ()");
5670 t
= atof_ieee (input_line_pointer
, type
, words
);
5672 input_line_pointer
= t
;
5674 *sizeP
= prec
* sizeof (LITTLENUM_TYPE
);
5675 /* This loops outputs the LITTLENUMs in REVERSE order; in accord with
5676 the bigendian 386. */
5677 for (wordP
= words
+ prec
- 1; prec
--;)
5679 md_number_to_chars (litP
, (valueT
) (*wordP
--), sizeof (LITTLENUM_TYPE
));
5680 litP
+= sizeof (LITTLENUM_TYPE
);
5685 static char output_invalid_buf
[sizeof (unsigned char) * 2 + 6];
5692 snprintf (output_invalid_buf
, sizeof (output_invalid_buf
),
5695 snprintf (output_invalid_buf
, sizeof (output_invalid_buf
),
5696 "(0x%x)", (unsigned char) c
);
5697 return output_invalid_buf
;
5700 /* REG_STRING starts *before* REGISTER_PREFIX. */
5702 static const reg_entry
*
5703 parse_real_register (char *reg_string
, char **end_op
)
5705 char *s
= reg_string
;
5707 char reg_name_given
[MAX_REG_NAME_SIZE
+ 1];
5710 /* Skip possible REGISTER_PREFIX and possible whitespace. */
5711 if (*s
== REGISTER_PREFIX
)
5714 if (is_space_char (*s
))
5718 while ((*p
++ = register_chars
[(unsigned char) *s
]) != '\0')
5720 if (p
>= reg_name_given
+ MAX_REG_NAME_SIZE
)
5721 return (const reg_entry
*) NULL
;
5725 /* For naked regs, make sure that we are not dealing with an identifier.
5726 This prevents confusing an identifier like `eax_var' with register
5728 if (allow_naked_reg
&& identifier_chars
[(unsigned char) *s
])
5729 return (const reg_entry
*) NULL
;
5733 r
= (const reg_entry
*) hash_find (reg_hash
, reg_name_given
);
5735 /* Handle floating point regs, allowing spaces in the (i) part. */
5736 if (r
== i386_regtab
/* %st is first entry of table */)
5738 if (is_space_char (*s
))
5743 if (is_space_char (*s
))
5745 if (*s
>= '0' && *s
<= '7')
5747 r
= &i386_float_regtab
[*s
- '0'];
5749 if (is_space_char (*s
))
5757 /* We have "%st(" then garbage. */
5758 return (const reg_entry
*) NULL
;
5763 && ((r
->reg_flags
& (RegRex64
| RegRex
)) | (r
->reg_type
& Reg64
)) != 0
5764 && (r
->reg_type
!= Control
|| !(cpu_arch_flags
& CpuSledgehammer
))
5765 && flag_code
!= CODE_64BIT
)
5766 return (const reg_entry
*) NULL
;
5771 /* REG_STRING starts *before* REGISTER_PREFIX. */
5773 static const reg_entry
*
5774 parse_register (char *reg_string
, char **end_op
)
5778 if (*reg_string
== REGISTER_PREFIX
|| allow_naked_reg
)
5779 r
= parse_real_register (reg_string
, end_op
);
5784 char *save
= input_line_pointer
;
5788 input_line_pointer
= reg_string
;
5789 c
= get_symbol_end ();
5790 symbolP
= symbol_find (reg_string
);
5791 if (symbolP
&& S_GET_SEGMENT (symbolP
) == reg_section
)
5793 const expressionS
*e
= symbol_get_value_expression (symbolP
);
5795 know (e
->X_op
== O_register
);
5796 know (e
->X_add_number
>= 0 && (valueT
) e
->X_add_number
< ARRAY_SIZE (i386_regtab
));
5797 r
= i386_regtab
+ e
->X_add_number
;
5798 *end_op
= input_line_pointer
;
5800 *input_line_pointer
= c
;
5801 input_line_pointer
= save
;
5807 i386_parse_name (char *name
, expressionS
*e
, char *nextcharP
)
5810 char *end
= input_line_pointer
;
5813 r
= parse_register (name
, &input_line_pointer
);
5814 if (r
&& end
<= input_line_pointer
)
5816 *nextcharP
= *input_line_pointer
;
5817 *input_line_pointer
= 0;
5818 e
->X_op
= O_register
;
5819 e
->X_add_number
= r
- i386_regtab
;
5822 input_line_pointer
= end
;
5828 md_operand (expressionS
*e
)
5830 if (*input_line_pointer
== REGISTER_PREFIX
)
5833 const reg_entry
*r
= parse_real_register (input_line_pointer
, &end
);
5837 e
->X_op
= O_register
;
5838 e
->X_add_number
= r
- i386_regtab
;
5839 input_line_pointer
= end
;
5845 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5846 const char *md_shortopts
= "kVQ:sqn";
5848 const char *md_shortopts
= "qn";
5851 #define OPTION_32 (OPTION_MD_BASE + 0)
5852 #define OPTION_64 (OPTION_MD_BASE + 1)
5853 #define OPTION_DIVIDE (OPTION_MD_BASE + 2)
5854 #define OPTION_MARCH (OPTION_MD_BASE + 3)
5855 #define OPTION_MTUNE (OPTION_MD_BASE + 4)
5857 struct option md_longopts
[] =
5859 {"32", no_argument
, NULL
, OPTION_32
},
5860 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) || defined(TE_PEP)
5861 {"64", no_argument
, NULL
, OPTION_64
},
5863 {"divide", no_argument
, NULL
, OPTION_DIVIDE
},
5864 {"march", required_argument
, NULL
, OPTION_MARCH
},
5865 {"mtune", required_argument
, NULL
, OPTION_MTUNE
},
5866 {NULL
, no_argument
, NULL
, 0}
5868 size_t md_longopts_size
= sizeof (md_longopts
);
5871 md_parse_option (int c
, char *arg
)
5878 optimize_align_code
= 0;
5885 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5886 /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section
5887 should be emitted or not. FIXME: Not implemented. */
5891 /* -V: SVR4 argument to print version ID. */
5893 print_version_id ();
5896 /* -k: Ignore for FreeBSD compatibility. */
5901 /* -s: On i386 Solaris, this tells the native assembler to use
5902 .stab instead of .stab.excl. We always use .stab anyhow. */
5905 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) || defined(TE_PEP)
5908 const char **list
, **l
;
5910 list
= bfd_target_list ();
5911 for (l
= list
; *l
!= NULL
; l
++)
5912 if (CONST_STRNEQ (*l
, "elf64-x86-64")
5913 || strcmp (*l
, "coff-x86-64") == 0
5914 || strcmp (*l
, "pe-x86-64") == 0
5915 || strcmp (*l
, "pei-x86-64") == 0)
5917 default_arch
= "x86_64";
5921 as_fatal (_("No compiled in support for x86_64"));
5928 default_arch
= "i386";
5932 #ifdef SVR4_COMMENT_CHARS
5937 n
= (char *) xmalloc (strlen (i386_comment_chars
) + 1);
5939 for (s
= i386_comment_chars
; *s
!= '\0'; s
++)
5943 i386_comment_chars
= n
;
5950 as_fatal (_("Invalid -march= option: `%s'"), arg
);
5951 for (i
= 0; i
< ARRAY_SIZE (cpu_arch
); i
++)
5953 if (strcmp (arg
, cpu_arch
[i
].name
) == 0)
5955 cpu_arch_isa
= cpu_arch
[i
].type
;
5956 cpu_arch_isa_flags
= cpu_arch
[i
].flags
;
5957 if (!cpu_arch_tune_set
)
5959 cpu_arch_tune
= cpu_arch_isa
;
5960 cpu_arch_tune_flags
= cpu_arch_isa_flags
;
5965 if (i
>= ARRAY_SIZE (cpu_arch
))
5966 as_fatal (_("Invalid -march= option: `%s'"), arg
);
5971 as_fatal (_("Invalid -mtune= option: `%s'"), arg
);
5972 for (i
= 0; i
< ARRAY_SIZE (cpu_arch
); i
++)
5974 if (strcmp (arg
, cpu_arch
[i
].name
) == 0)
5976 cpu_arch_tune_set
= 1;
5977 cpu_arch_tune
= cpu_arch
[i
].type
;
5978 cpu_arch_tune_flags
= cpu_arch
[i
].flags
;
5982 if (i
>= ARRAY_SIZE (cpu_arch
))
5983 as_fatal (_("Invalid -mtune= option: `%s'"), arg
);
5993 md_show_usage (stream
)
5996 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5997 fprintf (stream
, _("\
5999 -V print assembler version number\n\
6002 fprintf (stream
, _("\
6003 -n Do not optimize code alignment\n\
6004 -q quieten some warnings\n"));
6005 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
6006 fprintf (stream
, _("\
6009 #ifdef SVR4_COMMENT_CHARS
6010 fprintf (stream
, _("\
6011 --divide do not treat `/' as a comment character\n"));
6013 fprintf (stream
, _("\
6014 --divide ignored\n"));
6016 fprintf (stream
, _("\
6017 -march=CPU/-mtune=CPU generate code/optimize for CPU, where CPU is one of:\n\
6018 i386, i486, pentium, pentiumpro, pentium4, nocona,\n\
6019 core, core2, k6, athlon, k8, generic32, generic64\n"));
6025 x86_64_target_format (void)
6027 if (strcmp (default_arch
, "x86_64") == 0)
6029 set_code_flag (CODE_64BIT
);
6030 return COFF_TARGET_FORMAT
;
6032 else if (strcmp (default_arch
, "i386") == 0)
6034 set_code_flag (CODE_32BIT
);
6038 as_fatal (_("Unknown architecture"));
6043 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
6044 || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF))
6046 /* Pick the target format to use. */
6049 i386_target_format ()
6051 if (!strcmp (default_arch
, "x86_64"))
6053 set_code_flag (CODE_64BIT
);
6054 if (cpu_arch_isa_flags
== 0)
6055 cpu_arch_isa_flags
= Cpu186
|Cpu286
|Cpu386
|Cpu486
6056 |Cpu586
|Cpu686
|CpuP4
|CpuMMX
|CpuMMX2
6058 if (cpu_arch_tune_flags
== 0)
6059 cpu_arch_tune_flags
= Cpu186
|Cpu286
|Cpu386
|Cpu486
6060 |Cpu586
|Cpu686
|CpuP4
|CpuMMX
|CpuMMX2
6063 else if (!strcmp (default_arch
, "i386"))
6065 set_code_flag (CODE_32BIT
);
6066 if (cpu_arch_isa_flags
== 0)
6067 cpu_arch_isa_flags
= Cpu186
|Cpu286
|Cpu386
;
6068 if (cpu_arch_tune_flags
== 0)
6069 cpu_arch_tune_flags
= Cpu186
|Cpu286
|Cpu386
;
6072 as_fatal (_("Unknown architecture"));
6073 switch (OUTPUT_FLAVOR
)
6075 #ifdef OBJ_MAYBE_AOUT
6076 case bfd_target_aout_flavour
:
6077 return AOUT_TARGET_FORMAT
;
6079 #ifdef OBJ_MAYBE_COFF
6080 case bfd_target_coff_flavour
:
6083 #if defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF)
6084 case bfd_target_elf_flavour
:
6086 if (flag_code
== CODE_64BIT
)
6089 use_rela_relocations
= 1;
6091 return flag_code
== CODE_64BIT
? ELF_TARGET_FORMAT64
: ELF_TARGET_FORMAT
;
6100 #endif /* OBJ_MAYBE_ more than one */
6102 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF))
6103 void i386_elf_emit_arch_note ()
6105 if (IS_ELF
&& cpu_arch_name
!= NULL
)
6108 asection
*seg
= now_seg
;
6109 subsegT subseg
= now_subseg
;
6110 Elf_Internal_Note i_note
;
6111 Elf_External_Note e_note
;
6112 asection
*note_secp
;
6115 /* Create the .note section. */
6116 note_secp
= subseg_new (".note", 0);
6117 bfd_set_section_flags (stdoutput
,
6119 SEC_HAS_CONTENTS
| SEC_READONLY
);
6121 /* Process the arch string. */
6122 len
= strlen (cpu_arch_name
);
6124 i_note
.namesz
= len
+ 1;
6126 i_note
.type
= NT_ARCH
;
6127 p
= frag_more (sizeof (e_note
.namesz
));
6128 md_number_to_chars (p
, (valueT
) i_note
.namesz
, sizeof (e_note
.namesz
));
6129 p
= frag_more (sizeof (e_note
.descsz
));
6130 md_number_to_chars (p
, (valueT
) i_note
.descsz
, sizeof (e_note
.descsz
));
6131 p
= frag_more (sizeof (e_note
.type
));
6132 md_number_to_chars (p
, (valueT
) i_note
.type
, sizeof (e_note
.type
));
6133 p
= frag_more (len
+ 1);
6134 strcpy (p
, cpu_arch_name
);
6136 frag_align (2, 0, 0);
6138 subseg_set (seg
, subseg
);
6144 md_undefined_symbol (name
)
6147 if (name
[0] == GLOBAL_OFFSET_TABLE_NAME
[0]
6148 && name
[1] == GLOBAL_OFFSET_TABLE_NAME
[1]
6149 && name
[2] == GLOBAL_OFFSET_TABLE_NAME
[2]
6150 && strcmp (name
, GLOBAL_OFFSET_TABLE_NAME
) == 0)
6154 if (symbol_find (name
))
6155 as_bad (_("GOT already in symbol table"));
6156 GOT_symbol
= symbol_new (name
, undefined_section
,
6157 (valueT
) 0, &zero_address_frag
);
6164 /* Round up a section size to the appropriate boundary. */
6167 md_section_align (segment
, size
)
6168 segT segment ATTRIBUTE_UNUSED
;
6171 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
6172 if (OUTPUT_FLAVOR
== bfd_target_aout_flavour
)
6174 /* For a.out, force the section size to be aligned. If we don't do
6175 this, BFD will align it for us, but it will not write out the
6176 final bytes of the section. This may be a bug in BFD, but it is
6177 easier to fix it here since that is how the other a.out targets
6181 align
= bfd_get_section_alignment (stdoutput
, segment
);
6182 size
= ((size
+ (1 << align
) - 1) & ((valueT
) -1 << align
));
6189 /* On the i386, PC-relative offsets are relative to the start of the
6190 next instruction. That is, the address of the offset, plus its
6191 size, since the offset is always the last part of the insn. */
6194 md_pcrel_from (fixP
)
6197 return fixP
->fx_size
+ fixP
->fx_where
+ fixP
->fx_frag
->fr_address
;
6204 int ignore ATTRIBUTE_UNUSED
;
6208 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
6210 obj_elf_section_change_hook ();
6212 temp
= get_absolute_expression ();
6213 subseg_set (bss_section
, (subsegT
) temp
);
6214 demand_empty_rest_of_line ();
6220 i386_validate_fix (fixp
)
6223 if (fixp
->fx_subsy
&& fixp
->fx_subsy
== GOT_symbol
)
6225 if (fixp
->fx_r_type
== BFD_RELOC_32_PCREL
)
6229 fixp
->fx_r_type
= BFD_RELOC_X86_64_GOTPCREL
;
6234 fixp
->fx_r_type
= BFD_RELOC_386_GOTOFF
;
6236 fixp
->fx_r_type
= BFD_RELOC_X86_64_GOTOFF64
;
6243 tc_gen_reloc (section
, fixp
)
6244 asection
*section ATTRIBUTE_UNUSED
;
6248 bfd_reloc_code_real_type code
;
6250 switch (fixp
->fx_r_type
)
6252 case BFD_RELOC_X86_64_PLT32
:
6253 case BFD_RELOC_X86_64_GOT32
:
6254 case BFD_RELOC_X86_64_GOTPCREL
:
6255 case BFD_RELOC_386_PLT32
:
6256 case BFD_RELOC_386_GOT32
:
6257 case BFD_RELOC_386_GOTOFF
:
6258 case BFD_RELOC_386_GOTPC
:
6259 case BFD_RELOC_386_TLS_GD
:
6260 case BFD_RELOC_386_TLS_LDM
:
6261 case BFD_RELOC_386_TLS_LDO_32
:
6262 case BFD_RELOC_386_TLS_IE_32
:
6263 case BFD_RELOC_386_TLS_IE
:
6264 case BFD_RELOC_386_TLS_GOTIE
:
6265 case BFD_RELOC_386_TLS_LE_32
:
6266 case BFD_RELOC_386_TLS_LE
:
6267 case BFD_RELOC_386_TLS_GOTDESC
:
6268 case BFD_RELOC_386_TLS_DESC_CALL
:
6269 case BFD_RELOC_X86_64_TLSGD
:
6270 case BFD_RELOC_X86_64_TLSLD
:
6271 case BFD_RELOC_X86_64_DTPOFF32
:
6272 case BFD_RELOC_X86_64_DTPOFF64
:
6273 case BFD_RELOC_X86_64_GOTTPOFF
:
6274 case BFD_RELOC_X86_64_TPOFF32
:
6275 case BFD_RELOC_X86_64_TPOFF64
:
6276 case BFD_RELOC_X86_64_GOTOFF64
:
6277 case BFD_RELOC_X86_64_GOTPC32
:
6278 case BFD_RELOC_X86_64_GOT64
:
6279 case BFD_RELOC_X86_64_GOTPCREL64
:
6280 case BFD_RELOC_X86_64_GOTPC64
:
6281 case BFD_RELOC_X86_64_GOTPLT64
:
6282 case BFD_RELOC_X86_64_PLTOFF64
:
6283 case BFD_RELOC_X86_64_GOTPC32_TLSDESC
:
6284 case BFD_RELOC_X86_64_TLSDESC_CALL
:
6286 case BFD_RELOC_VTABLE_ENTRY
:
6287 case BFD_RELOC_VTABLE_INHERIT
:
6289 case BFD_RELOC_32_SECREL
:
6291 code
= fixp
->fx_r_type
;
6293 case BFD_RELOC_X86_64_32S
:
6294 if (!fixp
->fx_pcrel
)
6296 /* Don't turn BFD_RELOC_X86_64_32S into BFD_RELOC_32. */
6297 code
= fixp
->fx_r_type
;
6303 switch (fixp
->fx_size
)
6306 as_bad_where (fixp
->fx_file
, fixp
->fx_line
,
6307 _("can not do %d byte pc-relative relocation"),
6309 code
= BFD_RELOC_32_PCREL
;
6311 case 1: code
= BFD_RELOC_8_PCREL
; break;
6312 case 2: code
= BFD_RELOC_16_PCREL
; break;
6313 case 4: code
= BFD_RELOC_32_PCREL
; break;
6315 case 8: code
= BFD_RELOC_64_PCREL
; break;
6321 switch (fixp
->fx_size
)
6324 as_bad_where (fixp
->fx_file
, fixp
->fx_line
,
6325 _("can not do %d byte relocation"),
6327 code
= BFD_RELOC_32
;
6329 case 1: code
= BFD_RELOC_8
; break;
6330 case 2: code
= BFD_RELOC_16
; break;
6331 case 4: code
= BFD_RELOC_32
; break;
6333 case 8: code
= BFD_RELOC_64
; break;
6340 if ((code
== BFD_RELOC_32
6341 || code
== BFD_RELOC_32_PCREL
6342 || code
== BFD_RELOC_X86_64_32S
)
6344 && fixp
->fx_addsy
== GOT_symbol
)
6347 code
= BFD_RELOC_386_GOTPC
;
6349 code
= BFD_RELOC_X86_64_GOTPC32
;
6351 if ((code
== BFD_RELOC_64
|| code
== BFD_RELOC_64_PCREL
)
6353 && fixp
->fx_addsy
== GOT_symbol
)
6355 code
= BFD_RELOC_X86_64_GOTPC64
;
6358 rel
= (arelent
*) xmalloc (sizeof (arelent
));
6359 rel
->sym_ptr_ptr
= (asymbol
**) xmalloc (sizeof (asymbol
*));
6360 *rel
->sym_ptr_ptr
= symbol_get_bfdsym (fixp
->fx_addsy
);
6362 rel
->address
= fixp
->fx_frag
->fr_address
+ fixp
->fx_where
;
6364 if (!use_rela_relocations
)
6366 /* HACK: Since i386 ELF uses Rel instead of Rela, encode the
6367 vtable entry to be used in the relocation's section offset. */
6368 if (fixp
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)
6369 rel
->address
= fixp
->fx_offset
;
6373 /* Use the rela in 64bit mode. */
6376 if (!fixp
->fx_pcrel
)
6377 rel
->addend
= fixp
->fx_offset
;
6381 case BFD_RELOC_X86_64_PLT32
:
6382 case BFD_RELOC_X86_64_GOT32
:
6383 case BFD_RELOC_X86_64_GOTPCREL
:
6384 case BFD_RELOC_X86_64_TLSGD
:
6385 case BFD_RELOC_X86_64_TLSLD
:
6386 case BFD_RELOC_X86_64_GOTTPOFF
:
6387 case BFD_RELOC_X86_64_GOTPC32_TLSDESC
:
6388 case BFD_RELOC_X86_64_TLSDESC_CALL
:
6389 rel
->addend
= fixp
->fx_offset
- fixp
->fx_size
;
6392 rel
->addend
= (section
->vma
6394 + fixp
->fx_addnumber
6395 + md_pcrel_from (fixp
));
6400 rel
->howto
= bfd_reloc_type_lookup (stdoutput
, code
);
6401 if (rel
->howto
== NULL
)
6403 as_bad_where (fixp
->fx_file
, fixp
->fx_line
,
6404 _("cannot represent relocation type %s"),
6405 bfd_get_reloc_code_name (code
));
6406 /* Set howto to a garbage value so that we can keep going. */
6407 rel
->howto
= bfd_reloc_type_lookup (stdoutput
, BFD_RELOC_32
);
6408 assert (rel
->howto
!= NULL
);
6415 /* Parse operands using Intel syntax. This implements a recursive descent
6416 parser based on the BNF grammar published in Appendix B of the MASM 6.1
6419 FIXME: We do not recognize the full operand grammar defined in the MASM
6420 documentation. In particular, all the structure/union and
6421 high-level macro operands are missing.
6423 Uppercase words are terminals, lower case words are non-terminals.
6424 Objects surrounded by double brackets '[[' ']]' are optional. Vertical
6425 bars '|' denote choices. Most grammar productions are implemented in
6426 functions called 'intel_<production>'.
6428 Initial production is 'expr'.
6434 binOp & | AND | \| | OR | ^ | XOR
6436 byteRegister AL | AH | BL | BH | CL | CH | DL | DH
6438 constant digits [[ radixOverride ]]
6440 dataType BYTE | WORD | DWORD | FWORD | QWORD | TBYTE | OWORD | XMMWORD
6478 => expr expr cmpOp e04
6481 gpRegister AX | EAX | BX | EBX | CX | ECX | DX | EDX
6482 | BP | EBP | SP | ESP | DI | EDI | SI | ESI
6484 hexdigit a | b | c | d | e | f
6485 | A | B | C | D | E | F
6491 mulOp * | / | % | MOD | << | SHL | >> | SHR
6495 register specialRegister
6499 segmentRegister CS | DS | ES | FS | GS | SS
6501 specialRegister CR0 | CR2 | CR3 | CR4
6502 | DR0 | DR1 | DR2 | DR3 | DR6 | DR7
6503 | TR3 | TR4 | TR5 | TR6 | TR7
6505 We simplify the grammar in obvious places (e.g., register parsing is
6506 done by calling parse_register) and eliminate immediate left recursion
6507 to implement a recursive-descent parser.
6511 expr' cmpOp e04 expr'
6562 /* Parsing structure for the intel syntax parser. Used to implement the
6563 semantic actions for the operand grammar. */
6564 struct intel_parser_s
6566 char *op_string
; /* The string being parsed. */
6567 int got_a_float
; /* Whether the operand is a float. */
6568 int op_modifier
; /* Operand modifier. */
6569 int is_mem
; /* 1 if operand is memory reference. */
6570 int in_offset
; /* >=1 if parsing operand of offset. */
6571 int in_bracket
; /* >=1 if parsing operand in brackets. */
6572 const reg_entry
*reg
; /* Last register reference found. */
6573 char *disp
; /* Displacement string being built. */
6574 char *next_operand
; /* Resume point when splitting operands. */
6577 static struct intel_parser_s intel_parser
;
6579 /* Token structure for parsing intel syntax. */
6582 int code
; /* Token code. */
6583 const reg_entry
*reg
; /* Register entry for register tokens. */
6584 char *str
; /* String representation. */
6587 static struct intel_token cur_token
, prev_token
;
6589 /* Token codes for the intel parser. Since T_SHORT is already used
6590 by COFF, undefine it first to prevent a warning. */
6609 /* Prototypes for intel parser functions. */
6610 static int intel_match_token
PARAMS ((int code
));
6611 static void intel_get_token
PARAMS ((void));
6612 static void intel_putback_token
PARAMS ((void));
6613 static int intel_expr
PARAMS ((void));
6614 static int intel_e04
PARAMS ((void));
6615 static int intel_e05
PARAMS ((void));
6616 static int intel_e06
PARAMS ((void));
6617 static int intel_e09
PARAMS ((void));
6618 static int intel_bracket_expr
PARAMS ((void));
6619 static int intel_e10
PARAMS ((void));
6620 static int intel_e11
PARAMS ((void));
6623 i386_intel_operand (operand_string
, got_a_float
)
6624 char *operand_string
;
6630 p
= intel_parser
.op_string
= xstrdup (operand_string
);
6631 intel_parser
.disp
= (char *) xmalloc (strlen (operand_string
) + 1);
6635 /* Initialize token holders. */
6636 cur_token
.code
= prev_token
.code
= T_NIL
;
6637 cur_token
.reg
= prev_token
.reg
= NULL
;
6638 cur_token
.str
= prev_token
.str
= NULL
;
6640 /* Initialize parser structure. */
6641 intel_parser
.got_a_float
= got_a_float
;
6642 intel_parser
.op_modifier
= 0;
6643 intel_parser
.is_mem
= 0;
6644 intel_parser
.in_offset
= 0;
6645 intel_parser
.in_bracket
= 0;
6646 intel_parser
.reg
= NULL
;
6647 intel_parser
.disp
[0] = '\0';
6648 intel_parser
.next_operand
= NULL
;
6650 /* Read the first token and start the parser. */
6652 ret
= intel_expr ();
6657 if (cur_token
.code
!= T_NIL
)
6659 as_bad (_("invalid operand for '%s' ('%s' unexpected)"),
6660 current_templates
->start
->name
, cur_token
.str
);
6663 /* If we found a memory reference, hand it over to i386_displacement
6664 to fill in the rest of the operand fields. */
6665 else if (intel_parser
.is_mem
)
6667 if ((i
.mem_operands
== 1
6668 && (current_templates
->start
->opcode_modifier
& IsString
) == 0)
6669 || i
.mem_operands
== 2)
6671 as_bad (_("too many memory references for '%s'"),
6672 current_templates
->start
->name
);
6677 char *s
= intel_parser
.disp
;
6680 if (!quiet_warnings
&& intel_parser
.is_mem
< 0)
6681 /* See the comments in intel_bracket_expr. */
6682 as_warn (_("Treating `%s' as memory reference"), operand_string
);
6684 /* Add the displacement expression. */
6686 ret
= i386_displacement (s
, s
+ strlen (s
));
6689 /* Swap base and index in 16-bit memory operands like
6690 [si+bx]. Since i386_index_check is also used in AT&T
6691 mode we have to do that here. */
6694 && (i
.base_reg
->reg_type
& Reg16
)
6695 && (i
.index_reg
->reg_type
& Reg16
)
6696 && i
.base_reg
->reg_num
>= 6
6697 && i
.index_reg
->reg_num
< 6)
6699 const reg_entry
*base
= i
.index_reg
;
6701 i
.index_reg
= i
.base_reg
;
6704 ret
= i386_index_check (operand_string
);
6709 /* Constant and OFFSET expressions are handled by i386_immediate. */
6710 else if ((intel_parser
.op_modifier
& (1 << T_OFFSET
))
6711 || intel_parser
.reg
== NULL
)
6712 ret
= i386_immediate (intel_parser
.disp
);
6714 if (intel_parser
.next_operand
&& this_operand
>= MAX_OPERANDS
- 1)
6716 if (!ret
|| !intel_parser
.next_operand
)
6718 intel_parser
.op_string
= intel_parser
.next_operand
;
6719 this_operand
= i
.operands
++;
6723 free (intel_parser
.disp
);
6728 #define NUM_ADDRESS_REGS (!!i.base_reg + !!i.index_reg)
6732 expr' cmpOp e04 expr'
6737 /* XXX Implement the comparison operators. */
6738 return intel_e04 ();
6755 if (nregs
>= 0 && NUM_ADDRESS_REGS
> nregs
)
6756 i
.base_reg
= i386_regtab
+ REGNAM_AL
; /* al is invalid as base */
6758 if (cur_token
.code
== '+')
6760 else if (cur_token
.code
== '-')
6761 nregs
= NUM_ADDRESS_REGS
;
6765 strcat (intel_parser
.disp
, cur_token
.str
);
6766 intel_match_token (cur_token
.code
);
6777 int nregs
= ~NUM_ADDRESS_REGS
;
6784 if (cur_token
.code
== '&' || cur_token
.code
== '|' || cur_token
.code
== '^')
6788 str
[0] = cur_token
.code
;
6790 strcat (intel_parser
.disp
, str
);
6795 intel_match_token (cur_token
.code
);
6800 if (nregs
>= 0 && NUM_ADDRESS_REGS
> nregs
)
6801 i
.base_reg
= i386_regtab
+ REGNAM_AL
+ 1; /* cl is invalid as base */
6812 int nregs
= ~NUM_ADDRESS_REGS
;
6819 if (cur_token
.code
== '*' || cur_token
.code
== '/' || cur_token
.code
== '%')
6823 str
[0] = cur_token
.code
;
6825 strcat (intel_parser
.disp
, str
);
6827 else if (cur_token
.code
== T_SHL
)
6828 strcat (intel_parser
.disp
, "<<");
6829 else if (cur_token
.code
== T_SHR
)
6830 strcat (intel_parser
.disp
, ">>");
6834 intel_match_token (cur_token
.code
);
6839 if (nregs
>= 0 && NUM_ADDRESS_REGS
> nregs
)
6840 i
.base_reg
= i386_regtab
+ REGNAM_AL
+ 2; /* dl is invalid as base */
6858 int nregs
= ~NUM_ADDRESS_REGS
;
6863 /* Don't consume constants here. */
6864 if (cur_token
.code
== '+' || cur_token
.code
== '-')
6866 /* Need to look one token ahead - if the next token
6867 is a constant, the current token is its sign. */
6870 intel_match_token (cur_token
.code
);
6871 next_code
= cur_token
.code
;
6872 intel_putback_token ();
6873 if (next_code
== T_CONST
)
6877 /* e09 OFFSET e09 */
6878 if (cur_token
.code
== T_OFFSET
)
6881 ++intel_parser
.in_offset
;
6885 else if (cur_token
.code
== T_SHORT
)
6886 intel_parser
.op_modifier
|= 1 << T_SHORT
;
6889 else if (cur_token
.code
== '+')
6890 strcat (intel_parser
.disp
, "+");
6895 else if (cur_token
.code
== '-' || cur_token
.code
== '~')
6901 str
[0] = cur_token
.code
;
6903 strcat (intel_parser
.disp
, str
);
6910 intel_match_token (cur_token
.code
);
6918 /* e09' PTR e10 e09' */
6919 if (cur_token
.code
== T_PTR
)
6923 if (prev_token
.code
== T_BYTE
)
6924 suffix
= BYTE_MNEM_SUFFIX
;
6926 else if (prev_token
.code
== T_WORD
)
6928 if (current_templates
->start
->name
[0] == 'l'
6929 && current_templates
->start
->name
[2] == 's'
6930 && current_templates
->start
->name
[3] == 0)
6931 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
6932 else if (intel_parser
.got_a_float
== 2) /* "fi..." */
6933 suffix
= SHORT_MNEM_SUFFIX
;
6935 suffix
= WORD_MNEM_SUFFIX
;
6938 else if (prev_token
.code
== T_DWORD
)
6940 if (current_templates
->start
->name
[0] == 'l'
6941 && current_templates
->start
->name
[2] == 's'
6942 && current_templates
->start
->name
[3] == 0)
6943 suffix
= WORD_MNEM_SUFFIX
;
6944 else if (flag_code
== CODE_16BIT
6945 && (current_templates
->start
->opcode_modifier
6946 & (Jump
| JumpDword
)))
6947 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
6948 else if (intel_parser
.got_a_float
== 1) /* "f..." */
6949 suffix
= SHORT_MNEM_SUFFIX
;
6951 suffix
= LONG_MNEM_SUFFIX
;
6954 else if (prev_token
.code
== T_FWORD
)
6956 if (current_templates
->start
->name
[0] == 'l'
6957 && current_templates
->start
->name
[2] == 's'
6958 && current_templates
->start
->name
[3] == 0)
6959 suffix
= LONG_MNEM_SUFFIX
;
6960 else if (!intel_parser
.got_a_float
)
6962 if (flag_code
== CODE_16BIT
)
6963 add_prefix (DATA_PREFIX_OPCODE
);
6964 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
6967 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
6970 else if (prev_token
.code
== T_QWORD
)
6972 if (intel_parser
.got_a_float
== 1) /* "f..." */
6973 suffix
= LONG_MNEM_SUFFIX
;
6975 suffix
= QWORD_MNEM_SUFFIX
;
6978 else if (prev_token
.code
== T_TBYTE
)
6980 if (intel_parser
.got_a_float
== 1)
6981 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
6983 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
6986 else if (prev_token
.code
== T_XMMWORD
)
6988 /* XXX ignored for now, but accepted since gcc uses it */
6994 as_bad (_("Unknown operand modifier `%s'"), prev_token
.str
);
6998 /* Operands for jump/call using 'ptr' notation denote absolute
7000 if (current_templates
->start
->opcode_modifier
& (Jump
| JumpDword
))
7001 i
.types
[this_operand
] |= JumpAbsolute
;
7003 if (current_templates
->start
->base_opcode
== 0x8d /* lea */)
7007 else if (i
.suffix
!= suffix
)
7009 as_bad (_("Conflicting operand modifiers"));
7015 /* e09' : e10 e09' */
7016 else if (cur_token
.code
== ':')
7018 if (prev_token
.code
!= T_REG
)
7020 /* While {call,jmp} SSSS:OOOO is MASM syntax only when SSSS is a
7021 segment/group identifier (which we don't have), using comma
7022 as the operand separator there is even less consistent, since
7023 there all branches only have a single operand. */
7024 if (this_operand
!= 0
7025 || intel_parser
.in_offset
7026 || intel_parser
.in_bracket
7027 || (!(current_templates
->start
->opcode_modifier
7028 & (Jump
|JumpDword
|JumpInterSegment
))
7029 && !(current_templates
->start
->operand_types
[0]
7031 return intel_match_token (T_NIL
);
7032 /* Remember the start of the 2nd operand and terminate 1st
7034 XXX This isn't right, yet (when SSSS:OOOO is right operand of
7035 another expression), but it gets at least the simplest case
7036 (a plain number or symbol on the left side) right. */
7037 intel_parser
.next_operand
= intel_parser
.op_string
;
7038 *--intel_parser
.op_string
= '\0';
7039 return intel_match_token (':');
7047 intel_match_token (cur_token
.code
);
7053 --intel_parser
.in_offset
;
7056 if (NUM_ADDRESS_REGS
> nregs
)
7058 as_bad (_("Invalid operand to `OFFSET'"));
7061 intel_parser
.op_modifier
|= 1 << T_OFFSET
;
7064 if (nregs
>= 0 && NUM_ADDRESS_REGS
> nregs
)
7065 i
.base_reg
= i386_regtab
+ REGNAM_AL
+ 3; /* bl is invalid as base */
7070 intel_bracket_expr ()
7072 int was_offset
= intel_parser
.op_modifier
& (1 << T_OFFSET
);
7073 const char *start
= intel_parser
.op_string
;
7076 if (i
.op
[this_operand
].regs
)
7077 return intel_match_token (T_NIL
);
7079 intel_match_token ('[');
7081 /* Mark as a memory operand only if it's not already known to be an
7082 offset expression. If it's an offset expression, we need to keep
7084 if (!intel_parser
.in_offset
)
7086 ++intel_parser
.in_bracket
;
7088 /* Operands for jump/call inside brackets denote absolute addresses. */
7089 if (current_templates
->start
->opcode_modifier
& (Jump
| JumpDword
))
7090 i
.types
[this_operand
] |= JumpAbsolute
;
7092 /* Unfortunately gas always diverged from MASM in a respect that can't
7093 be easily fixed without risking to break code sequences likely to be
7094 encountered (the testsuite even check for this): MASM doesn't consider
7095 an expression inside brackets unconditionally as a memory reference.
7096 When that is e.g. a constant, an offset expression, or the sum of the
7097 two, this is still taken as a constant load. gas, however, always
7098 treated these as memory references. As a compromise, we'll try to make
7099 offset expressions inside brackets work the MASM way (since that's
7100 less likely to be found in real world code), but make constants alone
7101 continue to work the traditional gas way. In either case, issue a
7103 intel_parser
.op_modifier
&= ~was_offset
;
7106 strcat (intel_parser
.disp
, "[");
7108 /* Add a '+' to the displacement string if necessary. */
7109 if (*intel_parser
.disp
!= '\0'
7110 && *(intel_parser
.disp
+ strlen (intel_parser
.disp
) - 1) != '+')
7111 strcat (intel_parser
.disp
, "+");
7114 && (len
= intel_parser
.op_string
- start
- 1,
7115 intel_match_token (']')))
7117 /* Preserve brackets when the operand is an offset expression. */
7118 if (intel_parser
.in_offset
)
7119 strcat (intel_parser
.disp
, "]");
7122 --intel_parser
.in_bracket
;
7123 if (i
.base_reg
|| i
.index_reg
)
7124 intel_parser
.is_mem
= 1;
7125 if (!intel_parser
.is_mem
)
7127 if (!(intel_parser
.op_modifier
& (1 << T_OFFSET
)))
7128 /* Defer the warning until all of the operand was parsed. */
7129 intel_parser
.is_mem
= -1;
7130 else if (!quiet_warnings
)
7131 as_warn (_("`[%.*s]' taken to mean just `%.*s'"), len
, start
, len
, start
);
7134 intel_parser
.op_modifier
|= was_offset
;
7151 while (cur_token
.code
== '[')
7153 if (!intel_bracket_expr ())
7178 switch (cur_token
.code
)
7182 intel_match_token ('(');
7183 strcat (intel_parser
.disp
, "(");
7185 if (intel_expr () && intel_match_token (')'))
7187 strcat (intel_parser
.disp
, ")");
7194 return intel_bracket_expr ();
7199 strcat (intel_parser
.disp
, cur_token
.str
);
7200 intel_match_token (cur_token
.code
);
7202 /* Mark as a memory operand only if it's not already known to be an
7203 offset expression. */
7204 if (!intel_parser
.in_offset
)
7205 intel_parser
.is_mem
= 1;
7212 const reg_entry
*reg
= intel_parser
.reg
= cur_token
.reg
;
7214 intel_match_token (T_REG
);
7216 /* Check for segment change. */
7217 if (cur_token
.code
== ':')
7219 if (!(reg
->reg_type
& (SReg2
| SReg3
)))
7221 as_bad (_("`%s' is not a valid segment register"), reg
->reg_name
);
7224 else if (i
.seg
[i
.mem_operands
])
7225 as_warn (_("Extra segment override ignored"));
7228 if (!intel_parser
.in_offset
)
7229 intel_parser
.is_mem
= 1;
7230 switch (reg
->reg_num
)
7233 i
.seg
[i
.mem_operands
] = &es
;
7236 i
.seg
[i
.mem_operands
] = &cs
;
7239 i
.seg
[i
.mem_operands
] = &ss
;
7242 i
.seg
[i
.mem_operands
] = &ds
;
7245 i
.seg
[i
.mem_operands
] = &fs
;
7248 i
.seg
[i
.mem_operands
] = &gs
;
7254 /* Not a segment register. Check for register scaling. */
7255 else if (cur_token
.code
== '*')
7257 if (!intel_parser
.in_bracket
)
7259 as_bad (_("Register scaling only allowed in memory operands"));
7263 if (reg
->reg_type
& Reg16
) /* Disallow things like [si*1]. */
7264 reg
= i386_regtab
+ REGNAM_AX
+ 4; /* sp is invalid as index */
7265 else if (i
.index_reg
)
7266 reg
= i386_regtab
+ REGNAM_EAX
+ 4; /* esp is invalid as index */
7268 /* What follows must be a valid scale. */
7269 intel_match_token ('*');
7271 i
.types
[this_operand
] |= BaseIndex
;
7273 /* Set the scale after setting the register (otherwise,
7274 i386_scale will complain) */
7275 if (cur_token
.code
== '+' || cur_token
.code
== '-')
7277 char *str
, sign
= cur_token
.code
;
7278 intel_match_token (cur_token
.code
);
7279 if (cur_token
.code
!= T_CONST
)
7281 as_bad (_("Syntax error: Expecting a constant, got `%s'"),
7285 str
= (char *) xmalloc (strlen (cur_token
.str
) + 2);
7286 strcpy (str
+ 1, cur_token
.str
);
7288 if (!i386_scale (str
))
7292 else if (!i386_scale (cur_token
.str
))
7294 intel_match_token (cur_token
.code
);
7297 /* No scaling. If this is a memory operand, the register is either a
7298 base register (first occurrence) or an index register (second
7300 else if (intel_parser
.in_bracket
)
7305 else if (!i
.index_reg
)
7309 as_bad (_("Too many register references in memory operand"));
7313 i
.types
[this_operand
] |= BaseIndex
;
7316 /* It's neither base nor index. */
7317 else if (!intel_parser
.in_offset
&& !intel_parser
.is_mem
)
7319 i
.types
[this_operand
] |= reg
->reg_type
& ~BaseIndex
;
7320 i
.op
[this_operand
].regs
= reg
;
7325 as_bad (_("Invalid use of register"));
7329 /* Since registers are not part of the displacement string (except
7330 when we're parsing offset operands), we may need to remove any
7331 preceding '+' from the displacement string. */
7332 if (*intel_parser
.disp
!= '\0'
7333 && !intel_parser
.in_offset
)
7335 char *s
= intel_parser
.disp
;
7336 s
+= strlen (s
) - 1;
7359 intel_match_token (cur_token
.code
);
7361 if (cur_token
.code
== T_PTR
)
7364 /* It must have been an identifier. */
7365 intel_putback_token ();
7366 cur_token
.code
= T_ID
;
7372 if (!intel_parser
.in_offset
&& intel_parser
.is_mem
<= 0)
7376 /* The identifier represents a memory reference only if it's not
7377 preceded by an offset modifier and if it's not an equate. */
7378 symbolP
= symbol_find(cur_token
.str
);
7379 if (!symbolP
|| S_GET_SEGMENT(symbolP
) != absolute_section
)
7380 intel_parser
.is_mem
= 1;
7388 char *save_str
, sign
= 0;
7390 /* Allow constants that start with `+' or `-'. */
7391 if (cur_token
.code
== '-' || cur_token
.code
== '+')
7393 sign
= cur_token
.code
;
7394 intel_match_token (cur_token
.code
);
7395 if (cur_token
.code
!= T_CONST
)
7397 as_bad (_("Syntax error: Expecting a constant, got `%s'"),
7403 save_str
= (char *) xmalloc (strlen (cur_token
.str
) + 2);
7404 strcpy (save_str
+ !!sign
, cur_token
.str
);
7408 /* Get the next token to check for register scaling. */
7409 intel_match_token (cur_token
.code
);
7411 /* Check if this constant is a scaling factor for an index register. */
7412 if (cur_token
.code
== '*')
7414 if (intel_match_token ('*') && cur_token
.code
== T_REG
)
7416 const reg_entry
*reg
= cur_token
.reg
;
7418 if (!intel_parser
.in_bracket
)
7420 as_bad (_("Register scaling only allowed in memory operands"));
7424 if (reg
->reg_type
& Reg16
) /* Disallow things like [1*si]. */
7425 reg
= i386_regtab
+ REGNAM_AX
+ 4; /* sp is invalid as index */
7426 else if (i
.index_reg
)
7427 reg
= i386_regtab
+ REGNAM_EAX
+ 4; /* esp is invalid as index */
7429 /* The constant is followed by `* reg', so it must be
7432 i
.types
[this_operand
] |= BaseIndex
;
7434 /* Set the scale after setting the register (otherwise,
7435 i386_scale will complain) */
7436 if (!i386_scale (save_str
))
7438 intel_match_token (T_REG
);
7440 /* Since registers are not part of the displacement
7441 string, we may need to remove any preceding '+' from
7442 the displacement string. */
7443 if (*intel_parser
.disp
!= '\0')
7445 char *s
= intel_parser
.disp
;
7446 s
+= strlen (s
) - 1;
7456 /* The constant was not used for register scaling. Since we have
7457 already consumed the token following `*' we now need to put it
7458 back in the stream. */
7459 intel_putback_token ();
7462 /* Add the constant to the displacement string. */
7463 strcat (intel_parser
.disp
, save_str
);
7470 as_bad (_("Unrecognized token '%s'"), cur_token
.str
);
7474 /* Match the given token against cur_token. If they match, read the next
7475 token from the operand string. */
7477 intel_match_token (code
)
7480 if (cur_token
.code
== code
)
7487 as_bad (_("Unexpected token `%s'"), cur_token
.str
);
7492 /* Read a new token from intel_parser.op_string and store it in cur_token. */
7497 const reg_entry
*reg
;
7498 struct intel_token new_token
;
7500 new_token
.code
= T_NIL
;
7501 new_token
.reg
= NULL
;
7502 new_token
.str
= NULL
;
7504 /* Free the memory allocated to the previous token and move
7505 cur_token to prev_token. */
7507 free (prev_token
.str
);
7509 prev_token
= cur_token
;
7511 /* Skip whitespace. */
7512 while (is_space_char (*intel_parser
.op_string
))
7513 intel_parser
.op_string
++;
7515 /* Return an empty token if we find nothing else on the line. */
7516 if (*intel_parser
.op_string
== '\0')
7518 cur_token
= new_token
;
7522 /* The new token cannot be larger than the remainder of the operand
7524 new_token
.str
= (char *) xmalloc (strlen (intel_parser
.op_string
) + 1);
7525 new_token
.str
[0] = '\0';
7527 if (strchr ("0123456789", *intel_parser
.op_string
))
7529 char *p
= new_token
.str
;
7530 char *q
= intel_parser
.op_string
;
7531 new_token
.code
= T_CONST
;
7533 /* Allow any kind of identifier char to encompass floating point and
7534 hexadecimal numbers. */
7535 while (is_identifier_char (*q
))
7539 /* Recognize special symbol names [0-9][bf]. */
7540 if (strlen (intel_parser
.op_string
) == 2
7541 && (intel_parser
.op_string
[1] == 'b'
7542 || intel_parser
.op_string
[1] == 'f'))
7543 new_token
.code
= T_ID
;
7546 else if ((reg
= parse_register (intel_parser
.op_string
, &end_op
)) != NULL
)
7548 size_t len
= end_op
- intel_parser
.op_string
;
7550 new_token
.code
= T_REG
;
7551 new_token
.reg
= reg
;
7553 memcpy (new_token
.str
, intel_parser
.op_string
, len
);
7554 new_token
.str
[len
] = '\0';
7557 else if (is_identifier_char (*intel_parser
.op_string
))
7559 char *p
= new_token
.str
;
7560 char *q
= intel_parser
.op_string
;
7562 /* A '.' or '$' followed by an identifier char is an identifier.
7563 Otherwise, it's operator '.' followed by an expression. */
7564 if ((*q
== '.' || *q
== '$') && !is_identifier_char (*(q
+ 1)))
7566 new_token
.code
= '.';
7567 new_token
.str
[0] = '.';
7568 new_token
.str
[1] = '\0';
7572 while (is_identifier_char (*q
) || *q
== '@')
7576 if (strcasecmp (new_token
.str
, "NOT") == 0)
7577 new_token
.code
= '~';
7579 else if (strcasecmp (new_token
.str
, "MOD") == 0)
7580 new_token
.code
= '%';
7582 else if (strcasecmp (new_token
.str
, "AND") == 0)
7583 new_token
.code
= '&';
7585 else if (strcasecmp (new_token
.str
, "OR") == 0)
7586 new_token
.code
= '|';
7588 else if (strcasecmp (new_token
.str
, "XOR") == 0)
7589 new_token
.code
= '^';
7591 else if (strcasecmp (new_token
.str
, "SHL") == 0)
7592 new_token
.code
= T_SHL
;
7594 else if (strcasecmp (new_token
.str
, "SHR") == 0)
7595 new_token
.code
= T_SHR
;
7597 else if (strcasecmp (new_token
.str
, "BYTE") == 0)
7598 new_token
.code
= T_BYTE
;
7600 else if (strcasecmp (new_token
.str
, "WORD") == 0)
7601 new_token
.code
= T_WORD
;
7603 else if (strcasecmp (new_token
.str
, "DWORD") == 0)
7604 new_token
.code
= T_DWORD
;
7606 else if (strcasecmp (new_token
.str
, "FWORD") == 0)
7607 new_token
.code
= T_FWORD
;
7609 else if (strcasecmp (new_token
.str
, "QWORD") == 0)
7610 new_token
.code
= T_QWORD
;
7612 else if (strcasecmp (new_token
.str
, "TBYTE") == 0
7613 /* XXX remove (gcc still uses it) */
7614 || strcasecmp (new_token
.str
, "XWORD") == 0)
7615 new_token
.code
= T_TBYTE
;
7617 else if (strcasecmp (new_token
.str
, "XMMWORD") == 0
7618 || strcasecmp (new_token
.str
, "OWORD") == 0)
7619 new_token
.code
= T_XMMWORD
;
7621 else if (strcasecmp (new_token
.str
, "PTR") == 0)
7622 new_token
.code
= T_PTR
;
7624 else if (strcasecmp (new_token
.str
, "SHORT") == 0)
7625 new_token
.code
= T_SHORT
;
7627 else if (strcasecmp (new_token
.str
, "OFFSET") == 0)
7629 new_token
.code
= T_OFFSET
;
7631 /* ??? This is not mentioned in the MASM grammar but gcc
7632 makes use of it with -mintel-syntax. OFFSET may be
7633 followed by FLAT: */
7634 if (strncasecmp (q
, " FLAT:", 6) == 0)
7635 strcat (new_token
.str
, " FLAT:");
7638 /* ??? This is not mentioned in the MASM grammar. */
7639 else if (strcasecmp (new_token
.str
, "FLAT") == 0)
7641 new_token
.code
= T_OFFSET
;
7643 strcat (new_token
.str
, ":");
7645 as_bad (_("`:' expected"));
7649 new_token
.code
= T_ID
;
7653 else if (strchr ("+-/*%|&^:[]()~", *intel_parser
.op_string
))
7655 new_token
.code
= *intel_parser
.op_string
;
7656 new_token
.str
[0] = *intel_parser
.op_string
;
7657 new_token
.str
[1] = '\0';
7660 else if (strchr ("<>", *intel_parser
.op_string
)
7661 && *intel_parser
.op_string
== *(intel_parser
.op_string
+ 1))
7663 new_token
.code
= *intel_parser
.op_string
== '<' ? T_SHL
: T_SHR
;
7664 new_token
.str
[0] = *intel_parser
.op_string
;
7665 new_token
.str
[1] = *intel_parser
.op_string
;
7666 new_token
.str
[2] = '\0';
7670 as_bad (_("Unrecognized token `%s'"), intel_parser
.op_string
);
7672 intel_parser
.op_string
+= strlen (new_token
.str
);
7673 cur_token
= new_token
;
7676 /* Put cur_token back into the token stream and make cur_token point to
7679 intel_putback_token ()
7681 if (cur_token
.code
!= T_NIL
)
7683 intel_parser
.op_string
-= strlen (cur_token
.str
);
7684 free (cur_token
.str
);
7686 cur_token
= prev_token
;
7688 /* Forget prev_token. */
7689 prev_token
.code
= T_NIL
;
7690 prev_token
.reg
= NULL
;
7691 prev_token
.str
= NULL
;
7695 tc_x86_regname_to_dw2regnum (char *regname
)
7697 unsigned int regnum
;
7698 unsigned int regnames_count
;
7699 static const char *const regnames_32
[] =
7701 "eax", "ecx", "edx", "ebx",
7702 "esp", "ebp", "esi", "edi",
7703 "eip", "eflags", NULL
,
7704 "st0", "st1", "st2", "st3",
7705 "st4", "st5", "st6", "st7",
7707 "xmm0", "xmm1", "xmm2", "xmm3",
7708 "xmm4", "xmm5", "xmm6", "xmm7",
7709 "mm0", "mm1", "mm2", "mm3",
7710 "mm4", "mm5", "mm6", "mm7",
7711 "fcw", "fsw", "mxcsr",
7712 "es", "cs", "ss", "ds", "fs", "gs", NULL
, NULL
,
7715 static const char *const regnames_64
[] =
7717 "rax", "rdx", "rcx", "rbx",
7718 "rsi", "rdi", "rbp", "rsp",
7719 "r8", "r9", "r10", "r11",
7720 "r12", "r13", "r14", "r15",
7722 "xmm0", "xmm1", "xmm2", "xmm3",
7723 "xmm4", "xmm5", "xmm6", "xmm7",
7724 "xmm8", "xmm9", "xmm10", "xmm11",
7725 "xmm12", "xmm13", "xmm14", "xmm15",
7726 "st0", "st1", "st2", "st3",
7727 "st4", "st5", "st6", "st7",
7728 "mm0", "mm1", "mm2", "mm3",
7729 "mm4", "mm5", "mm6", "mm7",
7731 "es", "cs", "ss", "ds", "fs", "gs", NULL
, NULL
,
7732 "fs.base", "gs.base", NULL
, NULL
,
7734 "mxcsr", "fcw", "fsw"
7736 const char *const *regnames
;
7738 if (flag_code
== CODE_64BIT
)
7740 regnames
= regnames_64
;
7741 regnames_count
= ARRAY_SIZE (regnames_64
);
7745 regnames
= regnames_32
;
7746 regnames_count
= ARRAY_SIZE (regnames_32
);
7749 for (regnum
= 0; regnum
< regnames_count
; regnum
++)
7750 if (regnames
[regnum
] != NULL
7751 && strcmp (regname
, regnames
[regnum
]) == 0)
7758 tc_x86_frame_initial_instructions (void)
7760 static unsigned int sp_regno
;
7763 sp_regno
= tc_x86_regname_to_dw2regnum (flag_code
== CODE_64BIT
7766 cfi_add_CFA_def_cfa (sp_regno
, -x86_cie_data_alignment
);
7767 cfi_add_CFA_offset (x86_dwarf2_return_column
, x86_cie_data_alignment
);
7771 i386_elf_section_type (const char *str
, size_t len
)
7773 if (flag_code
== CODE_64BIT
7774 && len
== sizeof ("unwind") - 1
7775 && strncmp (str
, "unwind", 6) == 0)
7776 return SHT_X86_64_UNWIND
;
7783 tc_pe_dwarf2_emit_offset (symbolS
*symbol
, unsigned int size
)
7787 expr
.X_op
= O_secrel
;
7788 expr
.X_add_symbol
= symbol
;
7789 expr
.X_add_number
= 0;
7790 emit_expr (&expr
, size
);
7794 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
7795 /* For ELF on x86-64, add support for SHF_X86_64_LARGE. */
7798 x86_64_section_letter (int letter
, char **ptr_msg
)
7800 if (flag_code
== CODE_64BIT
)
7803 return SHF_X86_64_LARGE
;
7805 *ptr_msg
= _("Bad .section directive: want a,l,w,x,M,S,G,T in string");
7808 *ptr_msg
= _("Bad .section directive: want a,w,x,M,S,G,T in string");
7813 x86_64_section_word (char *str
, size_t len
)
7815 if (len
== 5 && flag_code
== CODE_64BIT
&& CONST_STRNEQ (str
, "large"))
7816 return SHF_X86_64_LARGE
;
7822 handle_large_common (int small ATTRIBUTE_UNUSED
)
7824 if (flag_code
!= CODE_64BIT
)
7826 s_comm_internal (0, elf_common_parse
);
7827 as_warn (_(".largecomm supported only in 64bit mode, producing .comm"));
7831 static segT lbss_section
;
7832 asection
*saved_com_section_ptr
= elf_com_section_ptr
;
7833 asection
*saved_bss_section
= bss_section
;
7835 if (lbss_section
== NULL
)
7837 flagword applicable
;
7839 subsegT subseg
= now_subseg
;
7841 /* The .lbss section is for local .largecomm symbols. */
7842 lbss_section
= subseg_new (".lbss", 0);
7843 applicable
= bfd_applicable_section_flags (stdoutput
);
7844 bfd_set_section_flags (stdoutput
, lbss_section
,
7845 applicable
& SEC_ALLOC
);
7846 seg_info (lbss_section
)->bss
= 1;
7848 subseg_set (seg
, subseg
);
7851 elf_com_section_ptr
= &_bfd_elf_large_com_section
;
7852 bss_section
= lbss_section
;
7854 s_comm_internal (0, elf_common_parse
);
7856 elf_com_section_ptr
= saved_com_section_ptr
;
7857 bss_section
= saved_bss_section
;
7860 #endif /* OBJ_ELF || OBJ_MAYBE_ELF */