1 /* tc-i386.c -- Assemble code for the Intel 80386
2 Copyright 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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 "elf/x86-64.h"
37 #ifndef REGISTER_WARNINGS
38 #define REGISTER_WARNINGS 1
41 #ifndef INFER_ADDR_PREFIX
42 #define INFER_ADDR_PREFIX 1
45 #ifndef SCALE1_WHEN_NO_INDEX
46 /* Specifying a scale factor besides 1 when there is no index is
47 futile. eg. `mov (%ebx,2),%al' does exactly the same as
48 `mov (%ebx),%al'. To slavishly follow what the programmer
49 specified, set SCALE1_WHEN_NO_INDEX to 0. */
50 #define SCALE1_WHEN_NO_INDEX 1
54 #define DEFAULT_ARCH "i386"
59 #define INLINE __inline__
65 static void set_code_flag (int);
66 static void set_16bit_gcc_code_flag (int);
67 static void set_intel_syntax (int);
68 static void set_cpu_arch (int);
70 static void pe_directive_secrel (int);
72 static void signed_cons (int);
73 static char *output_invalid (int c);
74 static int i386_operand (char *);
75 static int i386_intel_operand (char *, int);
76 static const reg_entry *parse_register (char *, char **);
77 static char *parse_insn (char *, char *);
78 static char *parse_operands (char *, const char *);
79 static void swap_operands (void);
80 static void swap_2_operands (int, int);
81 static void optimize_imm (void);
82 static void optimize_disp (void);
83 static int match_template (void);
84 static int check_string (void);
85 static int process_suffix (void);
86 static int check_byte_reg (void);
87 static int check_long_reg (void);
88 static int check_qword_reg (void);
89 static int check_word_reg (void);
90 static int finalize_imm (void);
91 static int process_operands (void);
92 static const seg_entry *build_modrm_byte (void);
93 static void output_insn (void);
94 static void output_imm (fragS *, offsetT);
95 static void output_disp (fragS *, offsetT);
97 static void s_bss (int);
99 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
100 static void handle_large_common (int small ATTRIBUTE_UNUSED);
103 static const char *default_arch = DEFAULT_ARCH;
105 /* 'md_assemble ()' gathers together information and puts it into a
112 const reg_entry *regs;
117 /* TM holds the template for the insn were currently assembling. */
120 /* SUFFIX holds the instruction mnemonic suffix if given.
121 (e.g. 'l' for 'movl') */
124 /* OPERANDS gives the number of given operands. */
125 unsigned int operands;
127 /* REG_OPERANDS, DISP_OPERANDS, MEM_OPERANDS, IMM_OPERANDS give the number
128 of given register, displacement, memory operands and immediate
130 unsigned int reg_operands, disp_operands, mem_operands, imm_operands;
132 /* TYPES [i] is the type (see above #defines) which tells us how to
133 use OP[i] for the corresponding operand. */
134 unsigned int types[MAX_OPERANDS];
136 /* Displacement expression, immediate expression, or register for each
138 union i386_op op[MAX_OPERANDS];
140 /* Flags for operands. */
141 unsigned int flags[MAX_OPERANDS];
142 #define Operand_PCrel 1
144 /* Relocation type for operand */
145 enum bfd_reloc_code_real reloc[MAX_OPERANDS];
147 /* BASE_REG, INDEX_REG, and LOG2_SCALE_FACTOR are used to encode
148 the base index byte below. */
149 const reg_entry *base_reg;
150 const reg_entry *index_reg;
151 unsigned int log2_scale_factor;
153 /* SEG gives the seg_entries of this insn. They are zero unless
154 explicit segment overrides are given. */
155 const seg_entry *seg[2];
157 /* PREFIX holds all the given prefix opcodes (usually null).
158 PREFIXES is the number of prefix opcodes. */
159 unsigned int prefixes;
160 unsigned char prefix[MAX_PREFIXES];
162 /* RM and SIB are the modrm byte and the sib byte where the
163 addressing modes of this insn are encoded. */
170 typedef struct _i386_insn i386_insn;
172 /* List of chars besides those in app.c:symbol_chars that can start an
173 operand. Used to prevent the scrubber eating vital white-space. */
174 const char extra_symbol_chars[] = "*%-(["
183 #if (defined (TE_I386AIX) \
184 || ((defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) \
185 && !defined (TE_GNU) \
186 && !defined (TE_LINUX) \
187 && !defined (TE_NETWARE) \
188 && !defined (TE_FreeBSD) \
189 && !defined (TE_NetBSD)))
190 /* This array holds the chars that always start a comment. If the
191 pre-processor is disabled, these aren't very useful. The option
192 --divide will remove '/' from this list. */
193 const char *i386_comment_chars = "#/";
194 #define SVR4_COMMENT_CHARS 1
195 #define PREFIX_SEPARATOR '\\'
198 const char *i386_comment_chars = "#";
199 #define PREFIX_SEPARATOR '/'
202 /* This array holds the chars that only start a comment at the beginning of
203 a line. If the line seems to have the form '# 123 filename'
204 .line and .file directives will appear in the pre-processed output.
205 Note that input_file.c hand checks for '#' at the beginning of the
206 first line of the input file. This is because the compiler outputs
207 #NO_APP at the beginning of its output.
208 Also note that comments started like this one will always work if
209 '/' isn't otherwise defined. */
210 const char line_comment_chars[] = "#/";
212 const char line_separator_chars[] = ";";
214 /* Chars that can be used to separate mant from exp in floating point
216 const char EXP_CHARS[] = "eE";
218 /* Chars that mean this number is a floating point constant
221 const char FLT_CHARS[] = "fFdDxX";
223 /* Tables for lexical analysis. */
224 static char mnemonic_chars[256];
225 static char register_chars[256];
226 static char operand_chars[256];
227 static char identifier_chars[256];
228 static char digit_chars[256];
230 /* Lexical macros. */
231 #define is_mnemonic_char(x) (mnemonic_chars[(unsigned char) x])
232 #define is_operand_char(x) (operand_chars[(unsigned char) x])
233 #define is_register_char(x) (register_chars[(unsigned char) x])
234 #define is_space_char(x) ((x) == ' ')
235 #define is_identifier_char(x) (identifier_chars[(unsigned char) x])
236 #define is_digit_char(x) (digit_chars[(unsigned char) x])
238 /* All non-digit non-letter characters that may occur in an operand. */
239 static char operand_special_chars[] = "%$-+(,)*._~/<>|&^!:[@]";
241 /* md_assemble() always leaves the strings it's passed unaltered. To
242 effect this we maintain a stack of saved characters that we've smashed
243 with '\0's (indicating end of strings for various sub-fields of the
244 assembler instruction). */
245 static char save_stack[32];
246 static char *save_stack_p;
247 #define END_STRING_AND_SAVE(s) \
248 do { *save_stack_p++ = *(s); *(s) = '\0'; } while (0)
249 #define RESTORE_END_STRING(s) \
250 do { *(s) = *--save_stack_p; } while (0)
252 /* The instruction we're assembling. */
255 /* Possible templates for current insn. */
256 static const templates *current_templates;
258 /* Per instruction expressionS buffers: max displacements & immediates. */
259 static expressionS disp_expressions[MAX_MEMORY_OPERANDS];
260 static expressionS im_expressions[MAX_IMMEDIATE_OPERANDS];
262 /* Current operand we are working on. */
263 static int this_operand;
265 /* We support four different modes. FLAG_CODE variable is used to distinguish
272 #define NUM_FLAG_CODE ((int) CODE_64BIT + 1)
274 static enum flag_code flag_code;
275 static unsigned int object_64bit;
276 static int use_rela_relocations = 0;
278 /* The names used to print error messages. */
279 static const char *flag_code_names[] =
286 /* 1 for intel syntax,
288 static int intel_syntax = 0;
290 /* 1 if register prefix % not required. */
291 static int allow_naked_reg = 0;
293 /* Register prefix used for error message. */
294 static const char *register_prefix = "%";
296 /* Used in 16 bit gcc mode to add an l suffix to call, ret, enter,
297 leave, push, and pop instructions so that gcc has the same stack
298 frame as in 32 bit mode. */
299 static char stackop_size = '\0';
301 /* Non-zero to optimize code alignment. */
302 int optimize_align_code = 1;
304 /* Non-zero to quieten some warnings. */
305 static int quiet_warnings = 0;
308 static const char *cpu_arch_name = NULL;
309 static const char *cpu_sub_arch_name = NULL;
311 /* CPU feature flags. */
312 static unsigned int cpu_arch_flags = CpuUnknownFlags | CpuNo64;
314 /* If we have selected a cpu we are generating instructions for. */
315 static int cpu_arch_tune_set = 0;
317 /* Cpu we are generating instructions for. */
318 static enum processor_type cpu_arch_tune = PROCESSOR_UNKNOWN;
320 /* CPU feature flags of cpu we are generating instructions for. */
321 static unsigned int cpu_arch_tune_flags = 0;
323 /* CPU instruction set architecture used. */
324 static enum processor_type cpu_arch_isa = PROCESSOR_UNKNOWN;
326 /* CPU feature flags of instruction set architecture used. */
327 static unsigned int cpu_arch_isa_flags = 0;
329 /* If set, conditional jumps are not automatically promoted to handle
330 larger than a byte offset. */
331 static unsigned int no_cond_jump_promotion = 0;
333 /* Pre-defined "_GLOBAL_OFFSET_TABLE_". */
334 static symbolS *GOT_symbol;
336 /* The dwarf2 return column, adjusted for 32 or 64 bit. */
337 unsigned int x86_dwarf2_return_column;
339 /* The dwarf2 data alignment, adjusted for 32 or 64 bit. */
340 int x86_cie_data_alignment;
342 /* Interface to relax_segment.
343 There are 3 major relax states for 386 jump insns because the
344 different types of jumps add different sizes to frags when we're
345 figuring out what sort of jump to choose to reach a given label. */
348 #define UNCOND_JUMP 0
350 #define COND_JUMP86 2
355 #define SMALL16 (SMALL | CODE16)
357 #define BIG16 (BIG | CODE16)
361 #define INLINE __inline__
367 #define ENCODE_RELAX_STATE(type, size) \
368 ((relax_substateT) (((type) << 2) | (size)))
369 #define TYPE_FROM_RELAX_STATE(s) \
371 #define DISP_SIZE_FROM_RELAX_STATE(s) \
372 ((((s) & 3) == BIG ? 4 : (((s) & 3) == BIG16 ? 2 : 1)))
374 /* This table is used by relax_frag to promote short jumps to long
375 ones where necessary. SMALL (short) jumps may be promoted to BIG
376 (32 bit long) ones, and SMALL16 jumps to BIG16 (16 bit long). We
377 don't allow a short jump in a 32 bit code segment to be promoted to
378 a 16 bit offset jump because it's slower (requires data size
379 prefix), and doesn't work, unless the destination is in the bottom
380 64k of the code segment (The top 16 bits of eip are zeroed). */
382 const relax_typeS md_relax_table[] =
385 1) most positive reach of this state,
386 2) most negative reach of this state,
387 3) how many bytes this mode will have in the variable part of the frag
388 4) which index into the table to try if we can't fit into this one. */
390 /* UNCOND_JUMP states. */
391 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (UNCOND_JUMP, BIG)},
392 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (UNCOND_JUMP, BIG16)},
393 /* dword jmp adds 4 bytes to frag:
394 0 extra opcode bytes, 4 displacement bytes. */
396 /* word jmp adds 2 byte2 to frag:
397 0 extra opcode bytes, 2 displacement bytes. */
400 /* COND_JUMP states. */
401 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP, BIG)},
402 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP, BIG16)},
403 /* dword conditionals adds 5 bytes to frag:
404 1 extra opcode byte, 4 displacement bytes. */
406 /* word conditionals add 3 bytes to frag:
407 1 extra opcode byte, 2 displacement bytes. */
410 /* COND_JUMP86 states. */
411 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP86, BIG)},
412 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP86, BIG16)},
413 /* dword conditionals adds 5 bytes to frag:
414 1 extra opcode byte, 4 displacement bytes. */
416 /* word conditionals add 4 bytes to frag:
417 1 displacement byte and a 3 byte long branch insn. */
421 static const arch_entry cpu_arch[] =
423 {"generic32", PROCESSOR_GENERIC32,
424 Cpu186|Cpu286|Cpu386},
425 {"generic64", PROCESSOR_GENERIC64,
426 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
427 |CpuMMX2|CpuSSE|CpuSSE2},
428 {"i8086", PROCESSOR_UNKNOWN,
430 {"i186", PROCESSOR_UNKNOWN,
432 {"i286", PROCESSOR_UNKNOWN,
434 {"i386", PROCESSOR_GENERIC32,
435 Cpu186|Cpu286|Cpu386},
436 {"i486", PROCESSOR_I486,
437 Cpu186|Cpu286|Cpu386|Cpu486},
438 {"i586", PROCESSOR_PENTIUM,
439 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586},
440 {"i686", PROCESSOR_PENTIUMPRO,
441 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686},
442 {"pentium", PROCESSOR_PENTIUM,
443 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586},
444 {"pentiumpro",PROCESSOR_PENTIUMPRO,
445 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686},
446 {"pentiumii", PROCESSOR_PENTIUMPRO,
447 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuMMX},
448 {"pentiumiii",PROCESSOR_PENTIUMPRO,
449 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuMMX|CpuMMX2|CpuSSE},
450 {"pentium4", PROCESSOR_PENTIUM4,
451 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
452 |CpuMMX2|CpuSSE|CpuSSE2},
453 {"prescott", PROCESSOR_NOCONA,
454 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
455 |CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3},
456 {"nocona", PROCESSOR_NOCONA,
457 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
458 |CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3},
459 {"yonah", PROCESSOR_CORE,
460 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
461 |CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3},
462 {"core", PROCESSOR_CORE,
463 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
464 |CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3},
465 {"merom", PROCESSOR_CORE2,
466 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
467 |CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3|CpuSSSE3},
468 {"core2", PROCESSOR_CORE2,
469 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
470 |CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3|CpuSSSE3},
472 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|CpuK6|CpuMMX},
473 {"k6_2", PROCESSOR_K6,
474 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|CpuK6|CpuMMX|Cpu3dnow},
475 {"athlon", PROCESSOR_ATHLON,
476 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuK6
477 |CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA},
478 {"sledgehammer", PROCESSOR_K8,
479 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuK6
480 |CpuSledgehammer|CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA|CpuSSE|CpuSSE2},
481 {"opteron", PROCESSOR_K8,
482 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuK6
483 |CpuSledgehammer|CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA|CpuSSE|CpuSSE2},
485 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuK6
486 |CpuSledgehammer|CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA|CpuSSE|CpuSSE2},
487 {"amdfam10", PROCESSOR_AMDFAM10,
488 Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuK6|CpuSledgehammer
489 |CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA|CpuSSE|CpuSSE2|CpuSSE3|CpuSSE4a
491 {".mmx", PROCESSOR_UNKNOWN,
493 {".sse", PROCESSOR_UNKNOWN,
494 CpuMMX|CpuMMX2|CpuSSE},
495 {".sse2", PROCESSOR_UNKNOWN,
496 CpuMMX|CpuMMX2|CpuSSE|CpuSSE2},
497 {".sse3", PROCESSOR_UNKNOWN,
498 CpuMMX|CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3},
499 {".ssse3", PROCESSOR_UNKNOWN,
500 CpuMMX|CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3|CpuSSSE3},
501 {".sse4.1", PROCESSOR_UNKNOWN,
502 CpuMMX|CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3|CpuSSSE3|CpuSSE4_1},
503 {".sse4.2", PROCESSOR_UNKNOWN,
504 CpuMMX|CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3|CpuSSSE3|CpuSSE4},
505 {".sse4", PROCESSOR_UNKNOWN,
506 CpuMMX|CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3|CpuSSSE3|CpuSSE4},
507 {".3dnow", PROCESSOR_UNKNOWN,
509 {".3dnowa", PROCESSOR_UNKNOWN,
510 CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA},
511 {".padlock", PROCESSOR_UNKNOWN,
513 {".pacifica", PROCESSOR_UNKNOWN,
515 {".svme", PROCESSOR_UNKNOWN,
517 {".sse4a", PROCESSOR_UNKNOWN,
518 CpuMMX|CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3|CpuSSE4a},
519 {".abm", PROCESSOR_UNKNOWN,
523 const pseudo_typeS md_pseudo_table[] =
525 #if !defined(OBJ_AOUT) && !defined(USE_ALIGN_PTWO)
526 {"align", s_align_bytes, 0},
528 {"align", s_align_ptwo, 0},
530 {"arch", set_cpu_arch, 0},
534 {"ffloat", float_cons, 'f'},
535 {"dfloat", float_cons, 'd'},
536 {"tfloat", float_cons, 'x'},
538 {"slong", signed_cons, 4},
539 {"noopt", s_ignore, 0},
540 {"optim", s_ignore, 0},
541 {"code16gcc", set_16bit_gcc_code_flag, CODE_16BIT},
542 {"code16", set_code_flag, CODE_16BIT},
543 {"code32", set_code_flag, CODE_32BIT},
544 {"code64", set_code_flag, CODE_64BIT},
545 {"intel_syntax", set_intel_syntax, 1},
546 {"att_syntax", set_intel_syntax, 0},
547 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
548 {"largecomm", handle_large_common, 0},
550 {"file", (void (*) (int)) dwarf2_directive_file, 0},
551 {"loc", dwarf2_directive_loc, 0},
552 {"loc_mark_labels", dwarf2_directive_loc_mark_labels, 0},
555 {"secrel32", pe_directive_secrel, 0},
560 /* For interface with expression (). */
561 extern char *input_line_pointer;
563 /* Hash table for instruction mnemonic lookup. */
564 static struct hash_control *op_hash;
566 /* Hash table for register lookup. */
567 static struct hash_control *reg_hash;
570 i386_align_code (fragS *fragP, int count)
572 /* Various efficient no-op patterns for aligning code labels.
573 Note: Don't try to assemble the instructions in the comments.
574 0L and 0w are not legal. */
575 static const char f32_1[] =
577 static const char f32_2[] =
578 {0x66,0x90}; /* xchg %ax,%ax */
579 static const char f32_3[] =
580 {0x8d,0x76,0x00}; /* leal 0(%esi),%esi */
581 static const char f32_4[] =
582 {0x8d,0x74,0x26,0x00}; /* leal 0(%esi,1),%esi */
583 static const char f32_5[] =
585 0x8d,0x74,0x26,0x00}; /* leal 0(%esi,1),%esi */
586 static const char f32_6[] =
587 {0x8d,0xb6,0x00,0x00,0x00,0x00}; /* leal 0L(%esi),%esi */
588 static const char f32_7[] =
589 {0x8d,0xb4,0x26,0x00,0x00,0x00,0x00}; /* leal 0L(%esi,1),%esi */
590 static const char f32_8[] =
592 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00}; /* leal 0L(%esi,1),%esi */
593 static const char f32_9[] =
594 {0x89,0xf6, /* movl %esi,%esi */
595 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
596 static const char f32_10[] =
597 {0x8d,0x76,0x00, /* leal 0(%esi),%esi */
598 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
599 static const char f32_11[] =
600 {0x8d,0x74,0x26,0x00, /* leal 0(%esi,1),%esi */
601 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
602 static const char f32_12[] =
603 {0x8d,0xb6,0x00,0x00,0x00,0x00, /* leal 0L(%esi),%esi */
604 0x8d,0xbf,0x00,0x00,0x00,0x00}; /* leal 0L(%edi),%edi */
605 static const char f32_13[] =
606 {0x8d,0xb6,0x00,0x00,0x00,0x00, /* leal 0L(%esi),%esi */
607 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
608 static const char f32_14[] =
609 {0x8d,0xb4,0x26,0x00,0x00,0x00,0x00, /* leal 0L(%esi,1),%esi */
610 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
611 static const char f32_15[] =
612 {0xeb,0x0d,0x90,0x90,0x90,0x90,0x90, /* jmp .+15; lotsa nops */
613 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90};
614 static const char f16_3[] =
615 {0x8d,0x74,0x00}; /* lea 0(%esi),%esi */
616 static const char f16_4[] =
617 {0x8d,0xb4,0x00,0x00}; /* lea 0w(%si),%si */
618 static const char f16_5[] =
620 0x8d,0xb4,0x00,0x00}; /* lea 0w(%si),%si */
621 static const char f16_6[] =
622 {0x89,0xf6, /* mov %si,%si */
623 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
624 static const char f16_7[] =
625 {0x8d,0x74,0x00, /* lea 0(%si),%si */
626 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
627 static const char f16_8[] =
628 {0x8d,0xb4,0x00,0x00, /* lea 0w(%si),%si */
629 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
630 static const char *const f32_patt[] = {
631 f32_1, f32_2, f32_3, f32_4, f32_5, f32_6, f32_7, f32_8,
632 f32_9, f32_10, f32_11, f32_12, f32_13, f32_14, f32_15
634 static const char *const f16_patt[] = {
635 f32_1, f32_2, f16_3, f16_4, f16_5, f16_6, f16_7, f16_8,
636 f32_15, f32_15, f32_15, f32_15, f32_15, f32_15, f32_15
639 static const char alt_3[] =
641 /* nopl 0(%[re]ax) */
642 static const char alt_4[] =
643 {0x0f,0x1f,0x40,0x00};
644 /* nopl 0(%[re]ax,%[re]ax,1) */
645 static const char alt_5[] =
646 {0x0f,0x1f,0x44,0x00,0x00};
647 /* nopw 0(%[re]ax,%[re]ax,1) */
648 static const char alt_6[] =
649 {0x66,0x0f,0x1f,0x44,0x00,0x00};
650 /* nopl 0L(%[re]ax) */
651 static const char alt_7[] =
652 {0x0f,0x1f,0x80,0x00,0x00,0x00,0x00};
653 /* nopl 0L(%[re]ax,%[re]ax,1) */
654 static const char alt_8[] =
655 {0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
656 /* nopw 0L(%[re]ax,%[re]ax,1) */
657 static const char alt_9[] =
658 {0x66,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
659 /* nopw %cs:0L(%[re]ax,%[re]ax,1) */
660 static const char alt_10[] =
661 {0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
663 nopw %cs:0L(%[re]ax,%[re]ax,1) */
664 static const char alt_long_11[] =
666 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
669 nopw %cs:0L(%[re]ax,%[re]ax,1) */
670 static const char alt_long_12[] =
673 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
677 nopw %cs:0L(%[re]ax,%[re]ax,1) */
678 static const char alt_long_13[] =
682 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
687 nopw %cs:0L(%[re]ax,%[re]ax,1) */
688 static const char alt_long_14[] =
693 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
699 nopw %cs:0L(%[re]ax,%[re]ax,1) */
700 static const char alt_long_15[] =
706 0x66,0x2e,0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
707 /* nopl 0(%[re]ax,%[re]ax,1)
708 nopw 0(%[re]ax,%[re]ax,1) */
709 static const char alt_short_11[] =
710 {0x0f,0x1f,0x44,0x00,0x00,
711 0x66,0x0f,0x1f,0x44,0x00,0x00};
712 /* nopw 0(%[re]ax,%[re]ax,1)
713 nopw 0(%[re]ax,%[re]ax,1) */
714 static const char alt_short_12[] =
715 {0x66,0x0f,0x1f,0x44,0x00,0x00,
716 0x66,0x0f,0x1f,0x44,0x00,0x00};
717 /* nopw 0(%[re]ax,%[re]ax,1)
719 static const char alt_short_13[] =
720 {0x66,0x0f,0x1f,0x44,0x00,0x00,
721 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00};
724 static const char alt_short_14[] =
725 {0x0f,0x1f,0x80,0x00,0x00,0x00,0x00,
726 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00};
728 nopl 0L(%[re]ax,%[re]ax,1) */
729 static const char alt_short_15[] =
730 {0x0f,0x1f,0x80,0x00,0x00,0x00,0x00,
731 0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
732 static const char *const alt_short_patt[] = {
733 f32_1, f32_2, alt_3, alt_4, alt_5, alt_6, alt_7, alt_8,
734 alt_9, alt_10, alt_short_11, alt_short_12, alt_short_13,
735 alt_short_14, alt_short_15
737 static const char *const alt_long_patt[] = {
738 f32_1, f32_2, alt_3, alt_4, alt_5, alt_6, alt_7, alt_8,
739 alt_9, alt_10, alt_long_11, alt_long_12, alt_long_13,
740 alt_long_14, alt_long_15
743 if (count <= 0 || count > 15)
746 /* We need to decide which NOP sequence to use for 32bit and
747 64bit. When -mtune= is used:
749 1. For PROCESSOR_I486, PROCESSOR_PENTIUM and PROCESSOR_GENERIC32,
750 f32_patt will be used.
751 2. For PROCESSOR_K8 and PROCESSOR_AMDFAM10 in 64bit, NOPs with
752 0x66 prefix will be used.
753 3. For PROCESSOR_CORE2, alt_long_patt will be used.
754 4. For PROCESSOR_PENTIUMPRO, PROCESSOR_PENTIUM4, PROCESSOR_NOCONA,
755 PROCESSOR_CORE, PROCESSOR_CORE2, PROCESSOR_K6, PROCESSOR_ATHLON
756 and PROCESSOR_GENERIC64, alt_short_patt will be used.
758 When -mtune= isn't used, alt_short_patt will be used if
759 cpu_arch_isa_flags has Cpu686. Otherwise, f32_patt will be used.
761 When -march= or .arch is used, we can't use anything beyond
762 cpu_arch_isa_flags. */
764 if (flag_code == CODE_16BIT)
766 memcpy (fragP->fr_literal + fragP->fr_fix,
767 f16_patt[count - 1], count);
769 /* Adjust jump offset. */
770 fragP->fr_literal[fragP->fr_fix + 1] = count - 2;
772 else if (flag_code == CODE_64BIT && cpu_arch_tune == PROCESSOR_K8)
775 int nnops = (count + 3) / 4;
776 int len = count / nnops;
777 int remains = count - nnops * len;
780 /* The recommended way to pad 64bit code is to use NOPs preceded
781 by maximally four 0x66 prefixes. Balance the size of nops. */
782 for (i = 0; i < remains; i++)
784 memset (fragP->fr_literal + fragP->fr_fix + pos, 0x66, len);
785 fragP->fr_literal[fragP->fr_fix + pos + len] = 0x90;
788 for (; i < nnops; i++)
790 memset (fragP->fr_literal + fragP->fr_fix + pos, 0x66, len - 1);
791 fragP->fr_literal[fragP->fr_fix + pos + len - 1] = 0x90;
797 const char *const *patt = NULL;
799 if (cpu_arch_isa == PROCESSOR_UNKNOWN)
801 /* PROCESSOR_UNKNOWN means that all ISAs may be used. */
802 switch (cpu_arch_tune)
804 case PROCESSOR_UNKNOWN:
805 /* We use cpu_arch_isa_flags to check if we SHOULD
806 optimize for Cpu686. */
807 if ((cpu_arch_isa_flags & Cpu686) != 0)
808 patt = alt_short_patt;
812 case PROCESSOR_CORE2:
813 patt = alt_long_patt;
815 case PROCESSOR_PENTIUMPRO:
816 case PROCESSOR_PENTIUM4:
817 case PROCESSOR_NOCONA:
820 case PROCESSOR_ATHLON:
822 case PROCESSOR_GENERIC64:
823 case PROCESSOR_AMDFAM10:
824 patt = alt_short_patt;
827 case PROCESSOR_PENTIUM:
828 case PROCESSOR_GENERIC32:
835 switch (cpu_arch_tune)
837 case PROCESSOR_UNKNOWN:
838 /* When cpu_arch_isa is net, cpu_arch_tune shouldn't be
839 PROCESSOR_UNKNOWN. */
844 case PROCESSOR_PENTIUM:
845 case PROCESSOR_PENTIUMPRO:
846 case PROCESSOR_PENTIUM4:
847 case PROCESSOR_NOCONA:
850 case PROCESSOR_ATHLON:
852 case PROCESSOR_AMDFAM10:
853 case PROCESSOR_GENERIC32:
854 /* We use cpu_arch_isa_flags to check if we CAN optimize
856 if ((cpu_arch_isa_flags & Cpu686) != 0)
857 patt = alt_short_patt;
861 case PROCESSOR_CORE2:
862 if ((cpu_arch_isa_flags & Cpu686) != 0)
863 patt = alt_long_patt;
867 case PROCESSOR_GENERIC64:
868 patt = alt_short_patt;
873 memcpy (fragP->fr_literal + fragP->fr_fix,
874 patt[count - 1], count);
876 fragP->fr_var = count;
879 static INLINE unsigned int
880 mode_from_disp_size (unsigned int t)
882 return (t & Disp8) ? 1 : (t & (Disp16 | Disp32 | Disp32S)) ? 2 : 0;
886 fits_in_signed_byte (offsetT num)
888 return (num >= -128) && (num <= 127);
892 fits_in_unsigned_byte (offsetT num)
894 return (num & 0xff) == num;
898 fits_in_unsigned_word (offsetT num)
900 return (num & 0xffff) == num;
904 fits_in_signed_word (offsetT num)
906 return (-32768 <= num) && (num <= 32767);
910 fits_in_signed_long (offsetT num ATTRIBUTE_UNUSED)
915 return (!(((offsetT) -1 << 31) & num)
916 || (((offsetT) -1 << 31) & num) == ((offsetT) -1 << 31));
918 } /* fits_in_signed_long() */
921 fits_in_unsigned_long (offsetT num ATTRIBUTE_UNUSED)
926 return (num & (((offsetT) 2 << 31) - 1)) == num;
928 } /* fits_in_unsigned_long() */
931 smallest_imm_type (offsetT num)
933 if (cpu_arch_flags != (Cpu186 | Cpu286 | Cpu386 | Cpu486 | CpuNo64))
935 /* This code is disabled on the 486 because all the Imm1 forms
936 in the opcode table are slower on the i486. They're the
937 versions with the implicitly specified single-position
938 displacement, which has another syntax if you really want to
941 return Imm1 | Imm8 | Imm8S | Imm16 | Imm32 | Imm32S | Imm64;
943 return (fits_in_signed_byte (num)
944 ? (Imm8S | Imm8 | Imm16 | Imm32 | Imm32S | Imm64)
945 : fits_in_unsigned_byte (num)
946 ? (Imm8 | Imm16 | Imm32 | Imm32S | Imm64)
947 : (fits_in_signed_word (num) || fits_in_unsigned_word (num))
948 ? (Imm16 | Imm32 | Imm32S | Imm64)
949 : fits_in_signed_long (num)
950 ? (Imm32 | Imm32S | Imm64)
951 : fits_in_unsigned_long (num)
957 offset_in_range (offsetT val, int size)
963 case 1: mask = ((addressT) 1 << 8) - 1; break;
964 case 2: mask = ((addressT) 1 << 16) - 1; break;
965 case 4: mask = ((addressT) 2 << 31) - 1; break;
967 case 8: mask = ((addressT) 2 << 63) - 1; break;
972 /* If BFD64, sign extend val. */
973 if (!use_rela_relocations)
974 if ((val & ~(((addressT) 2 << 31) - 1)) == 0)
975 val = (val ^ ((addressT) 1 << 31)) - ((addressT) 1 << 31);
977 if ((val & ~mask) != 0 && (val & ~mask) != ~mask)
979 char buf1[40], buf2[40];
981 sprint_value (buf1, val);
982 sprint_value (buf2, val & mask);
983 as_warn (_("%s shortened to %s"), buf1, buf2);
988 /* Returns 0 if attempting to add a prefix where one from the same
989 class already exists, 1 if non rep/repne added, 2 if rep/repne
992 add_prefix (unsigned int prefix)
997 if (prefix >= REX_OPCODE && prefix < REX_OPCODE + 16
998 && flag_code == CODE_64BIT)
1000 if ((i.prefix[REX_PREFIX] & prefix & REX_W)
1001 || ((i.prefix[REX_PREFIX] & (REX_R | REX_X | REX_B))
1002 && (prefix & (REX_R | REX_X | REX_B))))
1013 case CS_PREFIX_OPCODE:
1014 case DS_PREFIX_OPCODE:
1015 case ES_PREFIX_OPCODE:
1016 case FS_PREFIX_OPCODE:
1017 case GS_PREFIX_OPCODE:
1018 case SS_PREFIX_OPCODE:
1022 case REPNE_PREFIX_OPCODE:
1023 case REPE_PREFIX_OPCODE:
1026 case LOCK_PREFIX_OPCODE:
1034 case ADDR_PREFIX_OPCODE:
1038 case DATA_PREFIX_OPCODE:
1042 if (i.prefix[q] != 0)
1050 i.prefix[q] |= prefix;
1053 as_bad (_("same type of prefix used twice"));
1059 set_code_flag (int value)
1062 cpu_arch_flags &= ~(Cpu64 | CpuNo64);
1063 cpu_arch_flags |= (flag_code == CODE_64BIT ? Cpu64 : CpuNo64);
1064 if (value == CODE_64BIT && !(cpu_arch_flags & CpuSledgehammer))
1066 as_bad (_("64bit mode not supported on this CPU."));
1068 if (value == CODE_32BIT && !(cpu_arch_flags & Cpu386))
1070 as_bad (_("32bit mode not supported on this CPU."));
1072 stackop_size = '\0';
1076 set_16bit_gcc_code_flag (int new_code_flag)
1078 flag_code = new_code_flag;
1079 cpu_arch_flags &= ~(Cpu64 | CpuNo64);
1080 cpu_arch_flags |= (flag_code == CODE_64BIT ? Cpu64 : CpuNo64);
1081 stackop_size = LONG_MNEM_SUFFIX;
1085 set_intel_syntax (int syntax_flag)
1087 /* Find out if register prefixing is specified. */
1088 int ask_naked_reg = 0;
1091 if (!is_end_of_line[(unsigned char) *input_line_pointer])
1093 char *string = input_line_pointer;
1094 int e = get_symbol_end ();
1096 if (strcmp (string, "prefix") == 0)
1098 else if (strcmp (string, "noprefix") == 0)
1101 as_bad (_("bad argument to syntax directive."));
1102 *input_line_pointer = e;
1104 demand_empty_rest_of_line ();
1106 intel_syntax = syntax_flag;
1108 if (ask_naked_reg == 0)
1109 allow_naked_reg = (intel_syntax
1110 && (bfd_get_symbol_leading_char (stdoutput) != '\0'));
1112 allow_naked_reg = (ask_naked_reg < 0);
1114 identifier_chars['%'] = intel_syntax && allow_naked_reg ? '%' : 0;
1115 identifier_chars['$'] = intel_syntax ? '$' : 0;
1116 register_prefix = allow_naked_reg ? "" : "%";
1120 set_cpu_arch (int dummy ATTRIBUTE_UNUSED)
1124 if (!is_end_of_line[(unsigned char) *input_line_pointer])
1126 char *string = input_line_pointer;
1127 int e = get_symbol_end ();
1130 for (i = 0; i < ARRAY_SIZE (cpu_arch); i++)
1132 if (strcmp (string, cpu_arch[i].name) == 0)
1136 cpu_arch_name = cpu_arch[i].name;
1137 cpu_sub_arch_name = NULL;
1138 cpu_arch_flags = (cpu_arch[i].flags
1139 | (flag_code == CODE_64BIT
1140 ? Cpu64 : CpuNo64));
1141 cpu_arch_isa = cpu_arch[i].type;
1142 cpu_arch_isa_flags = cpu_arch[i].flags;
1143 if (!cpu_arch_tune_set)
1145 cpu_arch_tune = cpu_arch_isa;
1146 cpu_arch_tune_flags = cpu_arch_isa_flags;
1150 if ((cpu_arch_flags | cpu_arch[i].flags) != cpu_arch_flags)
1152 cpu_sub_arch_name = cpu_arch[i].name;
1153 cpu_arch_flags |= cpu_arch[i].flags;
1155 *input_line_pointer = e;
1156 demand_empty_rest_of_line ();
1160 if (i >= ARRAY_SIZE (cpu_arch))
1161 as_bad (_("no such architecture: `%s'"), string);
1163 *input_line_pointer = e;
1166 as_bad (_("missing cpu architecture"));
1168 no_cond_jump_promotion = 0;
1169 if (*input_line_pointer == ','
1170 && !is_end_of_line[(unsigned char) input_line_pointer[1]])
1172 char *string = ++input_line_pointer;
1173 int e = get_symbol_end ();
1175 if (strcmp (string, "nojumps") == 0)
1176 no_cond_jump_promotion = 1;
1177 else if (strcmp (string, "jumps") == 0)
1180 as_bad (_("no such architecture modifier: `%s'"), string);
1182 *input_line_pointer = e;
1185 demand_empty_rest_of_line ();
1191 if (!strcmp (default_arch, "x86_64"))
1192 return bfd_mach_x86_64;
1193 else if (!strcmp (default_arch, "i386"))
1194 return bfd_mach_i386_i386;
1196 as_fatal (_("Unknown architecture"));
1202 const char *hash_err;
1204 /* Initialize op_hash hash table. */
1205 op_hash = hash_new ();
1208 const template *optab;
1209 templates *core_optab;
1211 /* Setup for loop. */
1213 core_optab = (templates *) xmalloc (sizeof (templates));
1214 core_optab->start = optab;
1219 if (optab->name == NULL
1220 || strcmp (optab->name, (optab - 1)->name) != 0)
1222 /* different name --> ship out current template list;
1223 add to hash table; & begin anew. */
1224 core_optab->end = optab;
1225 hash_err = hash_insert (op_hash,
1230 as_fatal (_("Internal Error: Can't hash %s: %s"),
1234 if (optab->name == NULL)
1236 core_optab = (templates *) xmalloc (sizeof (templates));
1237 core_optab->start = optab;
1242 /* Initialize reg_hash hash table. */
1243 reg_hash = hash_new ();
1245 const reg_entry *regtab;
1246 unsigned int regtab_size = i386_regtab_size;
1248 for (regtab = i386_regtab; regtab_size--; regtab++)
1250 hash_err = hash_insert (reg_hash, regtab->reg_name, (PTR) regtab);
1252 as_fatal (_("Internal Error: Can't hash %s: %s"),
1258 /* Fill in lexical tables: mnemonic_chars, operand_chars. */
1263 for (c = 0; c < 256; c++)
1268 mnemonic_chars[c] = c;
1269 register_chars[c] = c;
1270 operand_chars[c] = c;
1272 else if (ISLOWER (c))
1274 mnemonic_chars[c] = c;
1275 register_chars[c] = c;
1276 operand_chars[c] = c;
1278 else if (ISUPPER (c))
1280 mnemonic_chars[c] = TOLOWER (c);
1281 register_chars[c] = mnemonic_chars[c];
1282 operand_chars[c] = c;
1285 if (ISALPHA (c) || ISDIGIT (c))
1286 identifier_chars[c] = c;
1289 identifier_chars[c] = c;
1290 operand_chars[c] = c;
1295 identifier_chars['@'] = '@';
1298 identifier_chars['?'] = '?';
1299 operand_chars['?'] = '?';
1301 digit_chars['-'] = '-';
1302 mnemonic_chars['-'] = '-';
1303 mnemonic_chars['.'] = '.';
1304 identifier_chars['_'] = '_';
1305 identifier_chars['.'] = '.';
1307 for (p = operand_special_chars; *p != '\0'; p++)
1308 operand_chars[(unsigned char) *p] = *p;
1311 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
1314 record_alignment (text_section, 2);
1315 record_alignment (data_section, 2);
1316 record_alignment (bss_section, 2);
1320 if (flag_code == CODE_64BIT)
1322 x86_dwarf2_return_column = 16;
1323 x86_cie_data_alignment = -8;
1327 x86_dwarf2_return_column = 8;
1328 x86_cie_data_alignment = -4;
1333 i386_print_statistics (FILE *file)
1335 hash_print_statistics (file, "i386 opcode", op_hash);
1336 hash_print_statistics (file, "i386 register", reg_hash);
1341 /* Debugging routines for md_assemble. */
1342 static void pte (template *);
1343 static void pt (unsigned int);
1344 static void pe (expressionS *);
1345 static void ps (symbolS *);
1348 pi (char *line, i386_insn *x)
1352 fprintf (stdout, "%s: template ", line);
1354 fprintf (stdout, " address: base %s index %s scale %x\n",
1355 x->base_reg ? x->base_reg->reg_name : "none",
1356 x->index_reg ? x->index_reg->reg_name : "none",
1357 x->log2_scale_factor);
1358 fprintf (stdout, " modrm: mode %x reg %x reg/mem %x\n",
1359 x->rm.mode, x->rm.reg, x->rm.regmem);
1360 fprintf (stdout, " sib: base %x index %x scale %x\n",
1361 x->sib.base, x->sib.index, x->sib.scale);
1362 fprintf (stdout, " rex: 64bit %x extX %x extY %x extZ %x\n",
1363 (x->rex & REX_W) != 0,
1364 (x->rex & REX_R) != 0,
1365 (x->rex & REX_X) != 0,
1366 (x->rex & REX_B) != 0);
1367 for (i = 0; i < x->operands; i++)
1369 fprintf (stdout, " #%d: ", i + 1);
1371 fprintf (stdout, "\n");
1373 & (Reg | SReg2 | SReg3 | Control | Debug | Test | RegMMX | RegXMM))
1374 fprintf (stdout, "%s\n", x->op[i].regs->reg_name);
1375 if (x->types[i] & Imm)
1377 if (x->types[i] & Disp)
1378 pe (x->op[i].disps);
1386 fprintf (stdout, " %d operands ", t->operands);
1387 fprintf (stdout, "opcode %x ", t->base_opcode);
1388 if (t->extension_opcode != None)
1389 fprintf (stdout, "ext %x ", t->extension_opcode);
1390 if (t->opcode_modifier & D)
1391 fprintf (stdout, "D");
1392 if (t->opcode_modifier & W)
1393 fprintf (stdout, "W");
1394 fprintf (stdout, "\n");
1395 for (i = 0; i < t->operands; i++)
1397 fprintf (stdout, " #%d type ", i + 1);
1398 pt (t->operand_types[i]);
1399 fprintf (stdout, "\n");
1406 fprintf (stdout, " operation %d\n", e->X_op);
1407 fprintf (stdout, " add_number %ld (%lx)\n",
1408 (long) e->X_add_number, (long) e->X_add_number);
1409 if (e->X_add_symbol)
1411 fprintf (stdout, " add_symbol ");
1412 ps (e->X_add_symbol);
1413 fprintf (stdout, "\n");
1417 fprintf (stdout, " op_symbol ");
1418 ps (e->X_op_symbol);
1419 fprintf (stdout, "\n");
1426 fprintf (stdout, "%s type %s%s",
1428 S_IS_EXTERNAL (s) ? "EXTERNAL " : "",
1429 segment_name (S_GET_SEGMENT (s)));
1432 static struct type_name
1437 const type_names[] =
1450 { BaseIndex, "BaseIndex" },
1454 { Disp32S, "d32s" },
1456 { InOutPortReg, "InOutPortReg" },
1457 { ShiftCount, "ShiftCount" },
1458 { Control, "control reg" },
1459 { Test, "test reg" },
1460 { Debug, "debug reg" },
1461 { FloatReg, "FReg" },
1462 { FloatAcc, "FAcc" },
1466 { JumpAbsolute, "Jump Absolute" },
1477 const struct type_name *ty;
1479 for (ty = type_names; ty->mask; ty++)
1481 fprintf (stdout, "%s, ", ty->tname);
1485 #endif /* DEBUG386 */
1487 static bfd_reloc_code_real_type
1488 reloc (unsigned int size,
1491 bfd_reloc_code_real_type other)
1493 if (other != NO_RELOC)
1495 reloc_howto_type *reloc;
1500 case BFD_RELOC_X86_64_GOT32:
1501 return BFD_RELOC_X86_64_GOT64;
1503 case BFD_RELOC_X86_64_PLTOFF64:
1504 return BFD_RELOC_X86_64_PLTOFF64;
1506 case BFD_RELOC_X86_64_GOTPC32:
1507 other = BFD_RELOC_X86_64_GOTPC64;
1509 case BFD_RELOC_X86_64_GOTPCREL:
1510 other = BFD_RELOC_X86_64_GOTPCREL64;
1512 case BFD_RELOC_X86_64_TPOFF32:
1513 other = BFD_RELOC_X86_64_TPOFF64;
1515 case BFD_RELOC_X86_64_DTPOFF32:
1516 other = BFD_RELOC_X86_64_DTPOFF64;
1522 /* Sign-checking 4-byte relocations in 16-/32-bit code is pointless. */
1523 if (size == 4 && flag_code != CODE_64BIT)
1526 reloc = bfd_reloc_type_lookup (stdoutput, other);
1528 as_bad (_("unknown relocation (%u)"), other);
1529 else if (size != bfd_get_reloc_size (reloc))
1530 as_bad (_("%u-byte relocation cannot be applied to %u-byte field"),
1531 bfd_get_reloc_size (reloc),
1533 else if (pcrel && !reloc->pc_relative)
1534 as_bad (_("non-pc-relative relocation for pc-relative field"));
1535 else if ((reloc->complain_on_overflow == complain_overflow_signed
1537 || (reloc->complain_on_overflow == complain_overflow_unsigned
1539 as_bad (_("relocated field and relocation type differ in signedness"));
1548 as_bad (_("there are no unsigned pc-relative relocations"));
1551 case 1: return BFD_RELOC_8_PCREL;
1552 case 2: return BFD_RELOC_16_PCREL;
1553 case 4: return BFD_RELOC_32_PCREL;
1554 case 8: return BFD_RELOC_64_PCREL;
1556 as_bad (_("cannot do %u byte pc-relative relocation"), size);
1563 case 4: return BFD_RELOC_X86_64_32S;
1568 case 1: return BFD_RELOC_8;
1569 case 2: return BFD_RELOC_16;
1570 case 4: return BFD_RELOC_32;
1571 case 8: return BFD_RELOC_64;
1573 as_bad (_("cannot do %s %u byte relocation"),
1574 sign > 0 ? "signed" : "unsigned", size);
1578 return BFD_RELOC_NONE;
1581 /* Here we decide which fixups can be adjusted to make them relative to
1582 the beginning of the section instead of the symbol. Basically we need
1583 to make sure that the dynamic relocations are done correctly, so in
1584 some cases we force the original symbol to be used. */
1587 tc_i386_fix_adjustable (fixS *fixP ATTRIBUTE_UNUSED)
1589 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
1593 /* Don't adjust pc-relative references to merge sections in 64-bit
1595 if (use_rela_relocations
1596 && (S_GET_SEGMENT (fixP->fx_addsy)->flags & SEC_MERGE) != 0
1600 /* The x86_64 GOTPCREL are represented as 32bit PCrel relocations
1601 and changed later by validate_fix. */
1602 if (GOT_symbol && fixP->fx_subsy == GOT_symbol
1603 && fixP->fx_r_type == BFD_RELOC_32_PCREL)
1606 /* adjust_reloc_syms doesn't know about the GOT. */
1607 if (fixP->fx_r_type == BFD_RELOC_386_GOTOFF
1608 || fixP->fx_r_type == BFD_RELOC_386_PLT32
1609 || fixP->fx_r_type == BFD_RELOC_386_GOT32
1610 || fixP->fx_r_type == BFD_RELOC_386_TLS_GD
1611 || fixP->fx_r_type == BFD_RELOC_386_TLS_LDM
1612 || fixP->fx_r_type == BFD_RELOC_386_TLS_LDO_32
1613 || fixP->fx_r_type == BFD_RELOC_386_TLS_IE_32
1614 || fixP->fx_r_type == BFD_RELOC_386_TLS_IE
1615 || fixP->fx_r_type == BFD_RELOC_386_TLS_GOTIE
1616 || fixP->fx_r_type == BFD_RELOC_386_TLS_LE_32
1617 || fixP->fx_r_type == BFD_RELOC_386_TLS_LE
1618 || fixP->fx_r_type == BFD_RELOC_386_TLS_GOTDESC
1619 || fixP->fx_r_type == BFD_RELOC_386_TLS_DESC_CALL
1620 || fixP->fx_r_type == BFD_RELOC_X86_64_PLT32
1621 || fixP->fx_r_type == BFD_RELOC_X86_64_GOT32
1622 || fixP->fx_r_type == BFD_RELOC_X86_64_GOTPCREL
1623 || fixP->fx_r_type == BFD_RELOC_X86_64_TLSGD
1624 || fixP->fx_r_type == BFD_RELOC_X86_64_TLSLD
1625 || fixP->fx_r_type == BFD_RELOC_X86_64_DTPOFF32
1626 || fixP->fx_r_type == BFD_RELOC_X86_64_DTPOFF64
1627 || fixP->fx_r_type == BFD_RELOC_X86_64_GOTTPOFF
1628 || fixP->fx_r_type == BFD_RELOC_X86_64_TPOFF32
1629 || fixP->fx_r_type == BFD_RELOC_X86_64_TPOFF64
1630 || fixP->fx_r_type == BFD_RELOC_X86_64_GOTOFF64
1631 || fixP->fx_r_type == BFD_RELOC_X86_64_GOTPC32_TLSDESC
1632 || fixP->fx_r_type == BFD_RELOC_X86_64_TLSDESC_CALL
1633 || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
1634 || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
1641 intel_float_operand (const char *mnemonic)
1643 /* Note that the value returned is meaningful only for opcodes with (memory)
1644 operands, hence the code here is free to improperly handle opcodes that
1645 have no operands (for better performance and smaller code). */
1647 if (mnemonic[0] != 'f')
1648 return 0; /* non-math */
1650 switch (mnemonic[1])
1652 /* fclex, fdecstp, fdisi, femms, feni, fincstp, finit, fsetpm, and
1653 the fs segment override prefix not currently handled because no
1654 call path can make opcodes without operands get here */
1656 return 2 /* integer op */;
1658 if (mnemonic[2] == 'd' && (mnemonic[3] == 'c' || mnemonic[3] == 'e'))
1659 return 3; /* fldcw/fldenv */
1662 if (mnemonic[2] != 'o' /* fnop */)
1663 return 3; /* non-waiting control op */
1666 if (mnemonic[2] == 's')
1667 return 3; /* frstor/frstpm */
1670 if (mnemonic[2] == 'a')
1671 return 3; /* fsave */
1672 if (mnemonic[2] == 't')
1674 switch (mnemonic[3])
1676 case 'c': /* fstcw */
1677 case 'd': /* fstdw */
1678 case 'e': /* fstenv */
1679 case 's': /* fsts[gw] */
1685 if (mnemonic[2] == 'r' || mnemonic[2] == 's')
1686 return 0; /* fxsave/fxrstor are not really math ops */
1693 /* This is the guts of the machine-dependent assembler. LINE points to a
1694 machine dependent instruction. This function is supposed to emit
1695 the frags/bytes it assembles to. */
1702 char mnemonic[MAX_MNEM_SIZE];
1704 /* Initialize globals. */
1705 memset (&i, '\0', sizeof (i));
1706 for (j = 0; j < MAX_OPERANDS; j++)
1707 i.reloc[j] = NO_RELOC;
1708 memset (disp_expressions, '\0', sizeof (disp_expressions));
1709 memset (im_expressions, '\0', sizeof (im_expressions));
1710 save_stack_p = save_stack;
1712 /* First parse an instruction mnemonic & call i386_operand for the operands.
1713 We assume that the scrubber has arranged it so that line[0] is the valid
1714 start of a (possibly prefixed) mnemonic. */
1716 line = parse_insn (line, mnemonic);
1720 line = parse_operands (line, mnemonic);
1724 /* The order of the immediates should be reversed
1725 for 2 immediates extrq and insertq instructions */
1726 if ((i.imm_operands == 2)
1727 && ((strcmp (mnemonic, "extrq") == 0)
1728 || (strcmp (mnemonic, "insertq") == 0)))
1730 swap_2_operands (0, 1);
1731 /* "extrq" and insertq" are the only two instructions whose operands
1732 have to be reversed even though they have two immediate operands.
1738 /* Now we've parsed the mnemonic into a set of templates, and have the
1739 operands at hand. */
1741 /* All intel opcodes have reversed operands except for "bound" and
1742 "enter". We also don't reverse intersegment "jmp" and "call"
1743 instructions with 2 immediate operands so that the immediate segment
1744 precedes the offset, as it does when in AT&T mode. */
1747 && (strcmp (mnemonic, "bound") != 0)
1748 && (strcmp (mnemonic, "invlpga") != 0)
1749 && !((i.types[0] & Imm) && (i.types[1] & Imm)))
1755 /* Don't optimize displacement for movabs since it only takes 64bit
1758 && (flag_code != CODE_64BIT
1759 || strcmp (mnemonic, "movabs") != 0))
1762 /* Next, we find a template that matches the given insn,
1763 making sure the overlap of the given operands types is consistent
1764 with the template operand types. */
1766 if (!match_template ())
1771 /* Undo SYSV386_COMPAT brokenness when in Intel mode. See i386.h */
1773 && (i.tm.base_opcode & 0xfffffde0) == 0xdce0)
1774 i.tm.base_opcode ^= Opcode_FloatR;
1776 /* Zap movzx and movsx suffix. The suffix may have been set from
1777 "word ptr" or "byte ptr" on the source operand, but we'll use
1778 the suffix later to choose the destination register. */
1779 if ((i.tm.base_opcode & ~9) == 0x0fb6)
1781 if (i.reg_operands < 2
1783 && (~i.tm.opcode_modifier
1790 as_bad (_("ambiguous operand size for `%s'"), i.tm.name);
1796 if (i.tm.opcode_modifier & FWait)
1797 if (!add_prefix (FWAIT_OPCODE))
1800 /* Check string instruction segment overrides. */
1801 if ((i.tm.opcode_modifier & IsString) != 0 && i.mem_operands != 0)
1803 if (!check_string ())
1807 if (!process_suffix ())
1810 /* Make still unresolved immediate matches conform to size of immediate
1811 given in i.suffix. */
1812 if (!finalize_imm ())
1815 if (i.types[0] & Imm1)
1816 i.imm_operands = 0; /* kludge for shift insns. */
1817 if (i.types[0] & ImplicitRegister)
1819 if (i.types[1] & ImplicitRegister)
1821 if (i.types[2] & ImplicitRegister)
1824 if (i.tm.opcode_modifier & ImmExt)
1828 if ((i.tm.cpu_flags & CpuSSE3) && i.operands > 0)
1830 /* Streaming SIMD extensions 3 Instructions have the fixed
1831 operands with an opcode suffix which is coded in the same
1832 place as an 8-bit immediate field would be. Here we check
1833 those operands and remove them afterwards. */
1836 for (x = 0; x < i.operands; x++)
1837 if (i.op[x].regs->reg_num != x)
1838 as_bad (_("can't use register '%s%s' as operand %d in '%s'."),
1840 i.op[x].regs->reg_name,
1846 /* These AMD 3DNow! and Intel Katmai New Instructions have an
1847 opcode suffix which is coded in the same place as an 8-bit
1848 immediate field would be. Here we fake an 8-bit immediate
1849 operand from the opcode suffix stored in tm.extension_opcode. */
1851 assert (i.imm_operands == 0 && i.operands <= 2 && 2 < MAX_OPERANDS);
1853 exp = &im_expressions[i.imm_operands++];
1854 i.op[i.operands].imms = exp;
1855 i.types[i.operands++] = Imm8;
1856 exp->X_op = O_constant;
1857 exp->X_add_number = i.tm.extension_opcode;
1858 i.tm.extension_opcode = None;
1861 /* For insns with operands there are more diddles to do to the opcode. */
1864 if (!process_operands ())
1867 else if (!quiet_warnings && (i.tm.opcode_modifier & Ugh) != 0)
1869 /* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc. */
1870 as_warn (_("translating to `%sp'"), i.tm.name);
1873 /* Handle conversion of 'int $3' --> special int3 insn. */
1874 if (i.tm.base_opcode == INT_OPCODE && i.op[0].imms->X_add_number == 3)
1876 i.tm.base_opcode = INT3_OPCODE;
1880 if ((i.tm.opcode_modifier & (Jump | JumpByte | JumpDword))
1881 && i.op[0].disps->X_op == O_constant)
1883 /* Convert "jmp constant" (and "call constant") to a jump (call) to
1884 the absolute address given by the constant. Since ix86 jumps and
1885 calls are pc relative, we need to generate a reloc. */
1886 i.op[0].disps->X_add_symbol = &abs_symbol;
1887 i.op[0].disps->X_op = O_symbol;
1890 if ((i.tm.opcode_modifier & Rex64) != 0)
1893 /* For 8 bit registers we need an empty rex prefix. Also if the
1894 instruction already has a prefix, we need to convert old
1895 registers to new ones. */
1897 if (((i.types[0] & Reg8) != 0
1898 && (i.op[0].regs->reg_flags & RegRex64) != 0)
1899 || ((i.types[1] & Reg8) != 0
1900 && (i.op[1].regs->reg_flags & RegRex64) != 0)
1901 || (((i.types[0] & Reg8) != 0 || (i.types[1] & Reg8) != 0)
1906 i.rex |= REX_OPCODE;
1907 for (x = 0; x < 2; x++)
1909 /* Look for 8 bit operand that uses old registers. */
1910 if ((i.types[x] & Reg8) != 0
1911 && (i.op[x].regs->reg_flags & RegRex64) == 0)
1913 /* In case it is "hi" register, give up. */
1914 if (i.op[x].regs->reg_num > 3)
1915 as_bad (_("can't encode register '%s%s' in an "
1916 "instruction requiring REX prefix."),
1917 register_prefix, i.op[x].regs->reg_name);
1919 /* Otherwise it is equivalent to the extended register.
1920 Since the encoding doesn't change this is merely
1921 cosmetic cleanup for debug output. */
1923 i.op[x].regs = i.op[x].regs + 8;
1929 add_prefix (REX_OPCODE | i.rex);
1931 /* We are ready to output the insn. */
1936 parse_insn (char *line, char *mnemonic)
1939 char *token_start = l;
1944 /* Non-zero if we found a prefix only acceptable with string insns. */
1945 const char *expecting_string_instruction = NULL;
1950 while ((*mnem_p = mnemonic_chars[(unsigned char) *l]) != 0)
1953 if (mnem_p >= mnemonic + MAX_MNEM_SIZE)
1955 as_bad (_("no such instruction: `%s'"), token_start);
1960 if (!is_space_char (*l)
1961 && *l != END_OF_INSN
1963 || (*l != PREFIX_SEPARATOR
1966 as_bad (_("invalid character %s in mnemonic"),
1967 output_invalid (*l));
1970 if (token_start == l)
1972 if (!intel_syntax && *l == PREFIX_SEPARATOR)
1973 as_bad (_("expecting prefix; got nothing"));
1975 as_bad (_("expecting mnemonic; got nothing"));
1979 /* Look up instruction (or prefix) via hash table. */
1980 current_templates = hash_find (op_hash, mnemonic);
1982 if (*l != END_OF_INSN
1983 && (!is_space_char (*l) || l[1] != END_OF_INSN)
1984 && current_templates
1985 && (current_templates->start->opcode_modifier & IsPrefix))
1987 if (current_templates->start->cpu_flags
1988 & (flag_code != CODE_64BIT ? Cpu64 : CpuNo64))
1990 as_bad ((flag_code != CODE_64BIT
1991 ? _("`%s' is only supported in 64-bit mode")
1992 : _("`%s' is not supported in 64-bit mode")),
1993 current_templates->start->name);
1996 /* If we are in 16-bit mode, do not allow addr16 or data16.
1997 Similarly, in 32-bit mode, do not allow addr32 or data32. */
1998 if ((current_templates->start->opcode_modifier & (Size16 | Size32))
1999 && flag_code != CODE_64BIT
2000 && (((current_templates->start->opcode_modifier & Size32) != 0)
2001 ^ (flag_code == CODE_16BIT)))
2003 as_bad (_("redundant %s prefix"),
2004 current_templates->start->name);
2007 /* Add prefix, checking for repeated prefixes. */
2008 switch (add_prefix (current_templates->start->base_opcode))
2013 expecting_string_instruction = current_templates->start->name;
2016 /* Skip past PREFIX_SEPARATOR and reset token_start. */
2023 if (!current_templates)
2025 /* See if we can get a match by trimming off a suffix. */
2028 case WORD_MNEM_SUFFIX:
2029 if (intel_syntax && (intel_float_operand (mnemonic) & 2))
2030 i.suffix = SHORT_MNEM_SUFFIX;
2032 case BYTE_MNEM_SUFFIX:
2033 case QWORD_MNEM_SUFFIX:
2034 i.suffix = mnem_p[-1];
2036 current_templates = hash_find (op_hash, mnemonic);
2038 case SHORT_MNEM_SUFFIX:
2039 case LONG_MNEM_SUFFIX:
2042 i.suffix = mnem_p[-1];
2044 current_templates = hash_find (op_hash, mnemonic);
2052 if (intel_float_operand (mnemonic) == 1)
2053 i.suffix = SHORT_MNEM_SUFFIX;
2055 i.suffix = LONG_MNEM_SUFFIX;
2057 current_templates = hash_find (op_hash, mnemonic);
2061 if (!current_templates)
2063 as_bad (_("no such instruction: `%s'"), token_start);
2068 if (current_templates->start->opcode_modifier & (Jump | JumpByte))
2070 /* Check for a branch hint. We allow ",pt" and ",pn" for
2071 predict taken and predict not taken respectively.
2072 I'm not sure that branch hints actually do anything on loop
2073 and jcxz insns (JumpByte) for current Pentium4 chips. They
2074 may work in the future and it doesn't hurt to accept them
2076 if (l[0] == ',' && l[1] == 'p')
2080 if (!add_prefix (DS_PREFIX_OPCODE))
2084 else if (l[2] == 'n')
2086 if (!add_prefix (CS_PREFIX_OPCODE))
2092 /* Any other comma loses. */
2095 as_bad (_("invalid character %s in mnemonic"),
2096 output_invalid (*l));
2100 /* Check if instruction is supported on specified architecture. */
2102 for (t = current_templates->start; t < current_templates->end; ++t)
2104 if (!((t->cpu_flags & ~(Cpu64 | CpuNo64))
2105 & ~(cpu_arch_flags & ~(Cpu64 | CpuNo64))))
2107 if (!(t->cpu_flags & (flag_code == CODE_64BIT ? CpuNo64 : Cpu64)))
2110 if (!(supported & 2))
2112 as_bad (flag_code == CODE_64BIT
2113 ? _("`%s' is not supported in 64-bit mode")
2114 : _("`%s' is only supported in 64-bit mode"),
2115 current_templates->start->name);
2118 if (!(supported & 1))
2120 as_warn (_("`%s' is not supported on `%s%s'"),
2121 current_templates->start->name,
2123 cpu_sub_arch_name ? cpu_sub_arch_name : "");
2125 else if ((Cpu386 & ~cpu_arch_flags) && (flag_code != CODE_16BIT))
2127 as_warn (_("use .code16 to ensure correct addressing mode"));
2130 /* Check for rep/repne without a string instruction. */
2131 if (expecting_string_instruction)
2133 static templates override;
2135 for (t = current_templates->start; t < current_templates->end; ++t)
2136 if (t->opcode_modifier & IsString)
2138 if (t >= current_templates->end)
2140 as_bad (_("expecting string instruction after `%s'"),
2141 expecting_string_instruction);
2144 for (override.start = t; t < current_templates->end; ++t)
2145 if (!(t->opcode_modifier & IsString))
2148 current_templates = &override;
2155 parse_operands (char *l, const char *mnemonic)
2159 /* 1 if operand is pending after ','. */
2160 unsigned int expecting_operand = 0;
2162 /* Non-zero if operand parens not balanced. */
2163 unsigned int paren_not_balanced;
2165 while (*l != END_OF_INSN)
2167 /* Skip optional white space before operand. */
2168 if (is_space_char (*l))
2170 if (!is_operand_char (*l) && *l != END_OF_INSN)
2172 as_bad (_("invalid character %s before operand %d"),
2173 output_invalid (*l),
2177 token_start = l; /* after white space */
2178 paren_not_balanced = 0;
2179 while (paren_not_balanced || *l != ',')
2181 if (*l == END_OF_INSN)
2183 if (paren_not_balanced)
2186 as_bad (_("unbalanced parenthesis in operand %d."),
2189 as_bad (_("unbalanced brackets in operand %d."),
2194 break; /* we are done */
2196 else if (!is_operand_char (*l) && !is_space_char (*l))
2198 as_bad (_("invalid character %s in operand %d"),
2199 output_invalid (*l),
2206 ++paren_not_balanced;
2208 --paren_not_balanced;
2213 ++paren_not_balanced;
2215 --paren_not_balanced;
2219 if (l != token_start)
2220 { /* Yes, we've read in another operand. */
2221 unsigned int operand_ok;
2222 this_operand = i.operands++;
2223 if (i.operands > MAX_OPERANDS)
2225 as_bad (_("spurious operands; (%d operands/instruction max)"),
2229 /* Now parse operand adding info to 'i' as we go along. */
2230 END_STRING_AND_SAVE (l);
2234 i386_intel_operand (token_start,
2235 intel_float_operand (mnemonic));
2237 operand_ok = i386_operand (token_start);
2239 RESTORE_END_STRING (l);
2245 if (expecting_operand)
2247 expecting_operand_after_comma:
2248 as_bad (_("expecting operand after ','; got nothing"));
2253 as_bad (_("expecting operand before ','; got nothing"));
2258 /* Now *l must be either ',' or END_OF_INSN. */
2261 if (*++l == END_OF_INSN)
2263 /* Just skip it, if it's \n complain. */
2264 goto expecting_operand_after_comma;
2266 expecting_operand = 1;
2273 swap_2_operands (int xchg1, int xchg2)
2275 union i386_op temp_op;
2276 unsigned int temp_type;
2277 enum bfd_reloc_code_real temp_reloc;
2279 temp_type = i.types[xchg2];
2280 i.types[xchg2] = i.types[xchg1];
2281 i.types[xchg1] = temp_type;
2282 temp_op = i.op[xchg2];
2283 i.op[xchg2] = i.op[xchg1];
2284 i.op[xchg1] = temp_op;
2285 temp_reloc = i.reloc[xchg2];
2286 i.reloc[xchg2] = i.reloc[xchg1];
2287 i.reloc[xchg1] = temp_reloc;
2291 swap_operands (void)
2296 swap_2_operands (1, i.operands - 2);
2299 swap_2_operands (0, i.operands - 1);
2305 if (i.mem_operands == 2)
2307 const seg_entry *temp_seg;
2308 temp_seg = i.seg[0];
2309 i.seg[0] = i.seg[1];
2310 i.seg[1] = temp_seg;
2314 /* Try to ensure constant immediates are represented in the smallest
2319 char guess_suffix = 0;
2323 guess_suffix = i.suffix;
2324 else if (i.reg_operands)
2326 /* Figure out a suffix from the last register operand specified.
2327 We can't do this properly yet, ie. excluding InOutPortReg,
2328 but the following works for instructions with immediates.
2329 In any case, we can't set i.suffix yet. */
2330 for (op = i.operands; --op >= 0;)
2331 if (i.types[op] & Reg)
2333 if (i.types[op] & Reg8)
2334 guess_suffix = BYTE_MNEM_SUFFIX;
2335 else if (i.types[op] & Reg16)
2336 guess_suffix = WORD_MNEM_SUFFIX;
2337 else if (i.types[op] & Reg32)
2338 guess_suffix = LONG_MNEM_SUFFIX;
2339 else if (i.types[op] & Reg64)
2340 guess_suffix = QWORD_MNEM_SUFFIX;
2344 else if ((flag_code == CODE_16BIT) ^ (i.prefix[DATA_PREFIX] != 0))
2345 guess_suffix = WORD_MNEM_SUFFIX;
2347 for (op = i.operands; --op >= 0;)
2348 if (i.types[op] & Imm)
2350 switch (i.op[op].imms->X_op)
2353 /* If a suffix is given, this operand may be shortened. */
2354 switch (guess_suffix)
2356 case LONG_MNEM_SUFFIX:
2357 i.types[op] |= Imm32 | Imm64;
2359 case WORD_MNEM_SUFFIX:
2360 i.types[op] |= Imm16 | Imm32S | Imm32 | Imm64;
2362 case BYTE_MNEM_SUFFIX:
2363 i.types[op] |= Imm16 | Imm8 | Imm8S | Imm32S | Imm32 | Imm64;
2367 /* If this operand is at most 16 bits, convert it
2368 to a signed 16 bit number before trying to see
2369 whether it will fit in an even smaller size.
2370 This allows a 16-bit operand such as $0xffe0 to
2371 be recognised as within Imm8S range. */
2372 if ((i.types[op] & Imm16)
2373 && (i.op[op].imms->X_add_number & ~(offsetT) 0xffff) == 0)
2375 i.op[op].imms->X_add_number =
2376 (((i.op[op].imms->X_add_number & 0xffff) ^ 0x8000) - 0x8000);
2378 if ((i.types[op] & Imm32)
2379 && ((i.op[op].imms->X_add_number & ~(((offsetT) 2 << 31) - 1))
2382 i.op[op].imms->X_add_number = ((i.op[op].imms->X_add_number
2383 ^ ((offsetT) 1 << 31))
2384 - ((offsetT) 1 << 31));
2386 i.types[op] |= smallest_imm_type (i.op[op].imms->X_add_number);
2388 /* We must avoid matching of Imm32 templates when 64bit
2389 only immediate is available. */
2390 if (guess_suffix == QWORD_MNEM_SUFFIX)
2391 i.types[op] &= ~Imm32;
2398 /* Symbols and expressions. */
2400 /* Convert symbolic operand to proper sizes for matching, but don't
2401 prevent matching a set of insns that only supports sizes other
2402 than those matching the insn suffix. */
2404 unsigned int mask, allowed = 0;
2407 for (t = current_templates->start;
2408 t < current_templates->end;
2410 allowed |= t->operand_types[op];
2411 switch (guess_suffix)
2413 case QWORD_MNEM_SUFFIX:
2414 mask = Imm64 | Imm32S;
2416 case LONG_MNEM_SUFFIX:
2419 case WORD_MNEM_SUFFIX:
2422 case BYTE_MNEM_SUFFIX:
2430 i.types[op] &= mask;
2437 /* Try to use the smallest displacement type too. */
2439 optimize_disp (void)
2443 for (op = i.operands; --op >= 0;)
2444 if (i.types[op] & Disp)
2446 if (i.op[op].disps->X_op == O_constant)
2448 offsetT disp = i.op[op].disps->X_add_number;
2450 if ((i.types[op] & Disp16)
2451 && (disp & ~(offsetT) 0xffff) == 0)
2453 /* If this operand is at most 16 bits, convert
2454 to a signed 16 bit number and don't use 64bit
2456 disp = (((disp & 0xffff) ^ 0x8000) - 0x8000);
2457 i.types[op] &= ~Disp64;
2459 if ((i.types[op] & Disp32)
2460 && (disp & ~(((offsetT) 2 << 31) - 1)) == 0)
2462 /* If this operand is at most 32 bits, convert
2463 to a signed 32 bit number and don't use 64bit
2465 disp &= (((offsetT) 2 << 31) - 1);
2466 disp = (disp ^ ((offsetT) 1 << 31)) - ((addressT) 1 << 31);
2467 i.types[op] &= ~Disp64;
2469 if (!disp && (i.types[op] & BaseIndex))
2471 i.types[op] &= ~Disp;
2475 else if (flag_code == CODE_64BIT)
2477 if (fits_in_signed_long (disp))
2479 i.types[op] &= ~Disp64;
2480 i.types[op] |= Disp32S;
2482 if (fits_in_unsigned_long (disp))
2483 i.types[op] |= Disp32;
2485 if ((i.types[op] & (Disp32 | Disp32S | Disp16))
2486 && fits_in_signed_byte (disp))
2487 i.types[op] |= Disp8;
2489 else if (i.reloc[op] == BFD_RELOC_386_TLS_DESC_CALL
2490 || i.reloc[op] == BFD_RELOC_X86_64_TLSDESC_CALL)
2492 fix_new_exp (frag_now, frag_more (0) - frag_now->fr_literal, 0,
2493 i.op[op].disps, 0, i.reloc[op]);
2494 i.types[op] &= ~Disp;
2497 /* We only support 64bit displacement on constants. */
2498 i.types[op] &= ~Disp64;
2503 match_template (void)
2505 /* Points to template once we've found it. */
2507 unsigned int overlap0, overlap1, overlap2, overlap3;
2508 unsigned int found_reverse_match;
2510 unsigned int operand_types [MAX_OPERANDS];
2511 int addr_prefix_disp;
2514 #if MAX_OPERANDS != 4
2515 # error "MAX_OPERANDS must be 4."
2518 #define MATCH(overlap, given, template) \
2519 ((overlap & ~JumpAbsolute) \
2520 && (((given) & (BaseIndex | JumpAbsolute)) \
2521 == ((overlap) & (BaseIndex | JumpAbsolute))))
2523 /* If given types r0 and r1 are registers they must be of the same type
2524 unless the expected operand type register overlap is null.
2525 Note that Acc in a template matches every size of reg. */
2526 #define CONSISTENT_REGISTER_MATCH(m0, g0, t0, m1, g1, t1) \
2527 (((g0) & Reg) == 0 || ((g1) & Reg) == 0 \
2528 || ((g0) & Reg) == ((g1) & Reg) \
2529 || ((((m0) & Acc) ? Reg : (t0)) & (((m1) & Acc) ? Reg : (t1)) & Reg) == 0 )
2535 found_reverse_match = 0;
2536 for (j = 0; j < MAX_OPERANDS; j++)
2537 operand_types [j] = 0;
2538 addr_prefix_disp = -1;
2539 suffix_check = (i.suffix == BYTE_MNEM_SUFFIX
2541 : (i.suffix == WORD_MNEM_SUFFIX
2543 : (i.suffix == SHORT_MNEM_SUFFIX
2545 : (i.suffix == LONG_MNEM_SUFFIX
2547 : (i.suffix == QWORD_MNEM_SUFFIX
2549 : (i.suffix == LONG_DOUBLE_MNEM_SUFFIX
2550 ? No_xSuf : 0))))));
2552 for (t = current_templates->start; t < current_templates->end; t++)
2554 addr_prefix_disp = -1;
2556 /* Must have right number of operands. */
2557 if (i.operands != t->operands)
2560 /* Check the suffix, except for some instructions in intel mode. */
2561 if ((t->opcode_modifier & suffix_check)
2563 && (t->opcode_modifier & IgnoreSize)))
2566 for (j = 0; j < MAX_OPERANDS; j++)
2567 operand_types [j] = t->operand_types [j];
2569 /* In general, don't allow 64-bit operands in 32-bit mode. */
2570 if (i.suffix == QWORD_MNEM_SUFFIX
2571 && flag_code != CODE_64BIT
2573 ? (!(t->opcode_modifier & IgnoreSize)
2574 && !intel_float_operand (t->name))
2575 : intel_float_operand (t->name) != 2)
2576 && (!(operand_types[0] & (RegMMX | RegXMM))
2577 || !(operand_types[t->operands > 1] & (RegMMX | RegXMM)))
2578 && (t->base_opcode != 0x0fc7
2579 || t->extension_opcode != 1 /* cmpxchg8b */))
2582 /* Do not verify operands when there are none. */
2583 else if (!t->operands)
2585 if (t->cpu_flags & ~cpu_arch_flags)
2587 /* We've found a match; break out of loop. */
2591 /* Address size prefix will turn Disp64/Disp32/Disp16 operand
2592 into Disp32/Disp16/Disp32 operand. */
2593 if (i.prefix[ADDR_PREFIX] != 0)
2595 unsigned int DispOn = 0, DispOff = 0;
2613 for (j = 0; j < MAX_OPERANDS; j++)
2615 /* There should be only one Disp operand. */
2616 if ((operand_types[j] & DispOff))
2618 addr_prefix_disp = j;
2619 operand_types[j] |= DispOn;
2620 operand_types[j] &= ~DispOff;
2626 overlap0 = i.types[0] & operand_types[0];
2627 switch (t->operands)
2630 if (!MATCH (overlap0, i.types[0], operand_types[0]))
2634 /* xchg %eax, %eax is a special case. It is an aliase for nop
2635 only in 32bit mode and we can use opcode 0x90. In 64bit
2636 mode, we can't use 0x90 for xchg %eax, %eax since it should
2637 zero-extend %eax to %rax. */
2638 if (flag_code == CODE_64BIT
2639 && t->base_opcode == 0x90
2640 && i.types [0] == (Acc | Reg32)
2641 && i.types [1] == (Acc | Reg32))
2645 overlap1 = i.types[1] & operand_types[1];
2646 if (!MATCH (overlap0, i.types[0], operand_types[0])
2647 || !MATCH (overlap1, i.types[1], operand_types[1])
2648 /* monitor in SSE3 is a very special case. The first
2649 register and the second register may have different
2650 sizes. The same applies to crc32 in SSE4.2. */
2651 || !((t->base_opcode == 0x0f01
2652 && t->extension_opcode == 0xc8)
2653 || t->base_opcode == 0xf20f38f1
2654 || CONSISTENT_REGISTER_MATCH (overlap0, i.types[0],
2656 overlap1, i.types[1],
2659 /* Check if other direction is valid ... */
2660 if ((t->opcode_modifier & (D | FloatD)) == 0)
2663 /* Try reversing direction of operands. */
2664 overlap0 = i.types[0] & operand_types[1];
2665 overlap1 = i.types[1] & operand_types[0];
2666 if (!MATCH (overlap0, i.types[0], operand_types[1])
2667 || !MATCH (overlap1, i.types[1], operand_types[0])
2668 || !CONSISTENT_REGISTER_MATCH (overlap0, i.types[0],
2670 overlap1, i.types[1],
2673 /* Does not match either direction. */
2676 /* found_reverse_match holds which of D or FloatDR
2678 if ((t->opcode_modifier & D))
2679 found_reverse_match = Opcode_D;
2680 else if ((t->opcode_modifier & FloatD))
2681 found_reverse_match = Opcode_FloatD;
2683 found_reverse_match = 0;
2684 if ((t->opcode_modifier & FloatR))
2685 found_reverse_match |= Opcode_FloatR;
2689 /* Found a forward 2 operand match here. */
2690 switch (t->operands)
2693 overlap3 = i.types[3] & operand_types[3];
2695 overlap2 = i.types[2] & operand_types[2];
2699 switch (t->operands)
2702 if (!MATCH (overlap3, i.types[3], operand_types[3])
2703 || !CONSISTENT_REGISTER_MATCH (overlap2,
2711 /* Here we make use of the fact that there are no
2712 reverse match 3 operand instructions, and all 3
2713 operand instructions only need to be checked for
2714 register consistency between operands 2 and 3. */
2715 if (!MATCH (overlap2, i.types[2], operand_types[2])
2716 || !CONSISTENT_REGISTER_MATCH (overlap1,
2726 /* Found either forward/reverse 2, 3 or 4 operand match here:
2727 slip through to break. */
2729 if (t->cpu_flags & ~cpu_arch_flags)
2731 found_reverse_match = 0;
2734 /* We've found a match; break out of loop. */
2738 if (t == current_templates->end)
2740 /* We found no match. */
2741 as_bad (_("suffix or operands invalid for `%s'"),
2742 current_templates->start->name);
2746 if (!quiet_warnings)
2749 && ((i.types[0] & JumpAbsolute)
2750 != (operand_types[0] & JumpAbsolute)))
2752 as_warn (_("indirect %s without `*'"), t->name);
2755 if ((t->opcode_modifier & (IsPrefix | IgnoreSize))
2756 == (IsPrefix | IgnoreSize))
2758 /* Warn them that a data or address size prefix doesn't
2759 affect assembly of the next line of code. */
2760 as_warn (_("stand-alone `%s' prefix"), t->name);
2764 /* Copy the template we found. */
2767 if (addr_prefix_disp != -1)
2768 i.tm.operand_types[addr_prefix_disp]
2769 = operand_types[addr_prefix_disp];
2771 if (found_reverse_match)
2773 /* If we found a reverse match we must alter the opcode
2774 direction bit. found_reverse_match holds bits to change
2775 (different for int & float insns). */
2777 i.tm.base_opcode ^= found_reverse_match;
2779 i.tm.operand_types[0] = operand_types[1];
2780 i.tm.operand_types[1] = operand_types[0];
2789 int mem_op = (i.types[0] & AnyMem) ? 0 : 1;
2790 if ((i.tm.operand_types[mem_op] & EsSeg) != 0)
2792 if (i.seg[0] != NULL && i.seg[0] != &es)
2794 as_bad (_("`%s' operand %d must use `%%es' segment"),
2799 /* There's only ever one segment override allowed per instruction.
2800 This instruction possibly has a legal segment override on the
2801 second operand, so copy the segment to where non-string
2802 instructions store it, allowing common code. */
2803 i.seg[0] = i.seg[1];
2805 else if ((i.tm.operand_types[mem_op + 1] & EsSeg) != 0)
2807 if (i.seg[1] != NULL && i.seg[1] != &es)
2809 as_bad (_("`%s' operand %d must use `%%es' segment"),
2819 process_suffix (void)
2821 /* If matched instruction specifies an explicit instruction mnemonic
2823 if (i.tm.opcode_modifier & (Size16 | Size32 | Size64))
2825 if (i.tm.opcode_modifier & Size16)
2826 i.suffix = WORD_MNEM_SUFFIX;
2827 else if (i.tm.opcode_modifier & Size64)
2828 i.suffix = QWORD_MNEM_SUFFIX;
2830 i.suffix = LONG_MNEM_SUFFIX;
2832 else if (i.reg_operands)
2834 /* If there's no instruction mnemonic suffix we try to invent one
2835 based on register operands. */
2838 /* We take i.suffix from the last register operand specified,
2839 Destination register type is more significant than source
2840 register type. crc32 in SSE4.2 prefers source register
2842 if (i.tm.base_opcode == 0xf20f38f1)
2844 if ((i.types[0] & Reg))
2845 i.suffix = ((i.types[0] & Reg16) ? WORD_MNEM_SUFFIX :
2848 else if (i.tm.base_opcode == 0xf20f38f0)
2850 if ((i.types[0] & Reg8))
2851 i.suffix = BYTE_MNEM_SUFFIX;
2858 if (i.tm.base_opcode == 0xf20f38f1
2859 || i.tm.base_opcode == 0xf20f38f0)
2861 /* We have to know the operand size for crc32. */
2862 as_bad (_("ambiguous memory operand size for `%s`"),
2867 for (op = i.operands; --op >= 0;)
2868 if ((i.types[op] & Reg)
2869 && !(i.tm.operand_types[op] & InOutPortReg))
2871 i.suffix = ((i.types[op] & Reg8) ? BYTE_MNEM_SUFFIX :
2872 (i.types[op] & Reg16) ? WORD_MNEM_SUFFIX :
2873 (i.types[op] & Reg64) ? QWORD_MNEM_SUFFIX :
2879 else if (i.suffix == BYTE_MNEM_SUFFIX)
2881 if (!check_byte_reg ())
2884 else if (i.suffix == LONG_MNEM_SUFFIX)
2886 if (!check_long_reg ())
2889 else if (i.suffix == QWORD_MNEM_SUFFIX)
2891 if (!check_qword_reg ())
2894 else if (i.suffix == WORD_MNEM_SUFFIX)
2896 if (!check_word_reg ())
2899 else if (intel_syntax && (i.tm.opcode_modifier & IgnoreSize))
2900 /* Do nothing if the instruction is going to ignore the prefix. */
2905 else if ((i.tm.opcode_modifier & DefaultSize)
2907 /* exclude fldenv/frstor/fsave/fstenv */
2908 && (i.tm.opcode_modifier & No_sSuf))
2910 i.suffix = stackop_size;
2912 else if (intel_syntax
2914 && ((i.tm.operand_types[0] & JumpAbsolute)
2915 || (i.tm.opcode_modifier & (JumpByte|JumpInterSegment))
2916 || (i.tm.base_opcode == 0x0f01 /* [ls][gi]dt */
2917 && i.tm.extension_opcode <= 3)))
2922 if (!(i.tm.opcode_modifier & No_qSuf))
2924 i.suffix = QWORD_MNEM_SUFFIX;
2928 if (!(i.tm.opcode_modifier & No_lSuf))
2929 i.suffix = LONG_MNEM_SUFFIX;
2932 if (!(i.tm.opcode_modifier & No_wSuf))
2933 i.suffix = WORD_MNEM_SUFFIX;
2942 if (i.tm.opcode_modifier & W)
2944 as_bad (_("no instruction mnemonic suffix given and "
2945 "no register operands; can't size instruction"));
2951 unsigned int suffixes = (~i.tm.opcode_modifier
2959 if ((i.tm.opcode_modifier & W)
2960 || ((suffixes & (suffixes - 1))
2961 && !(i.tm.opcode_modifier & (DefaultSize | IgnoreSize))))
2963 as_bad (_("ambiguous operand size for `%s'"), i.tm.name);
2969 /* Change the opcode based on the operand size given by i.suffix;
2970 We don't need to change things for byte insns. */
2972 if (i.suffix && i.suffix != BYTE_MNEM_SUFFIX)
2974 /* It's not a byte, select word/dword operation. */
2975 if (i.tm.opcode_modifier & W)
2977 if (i.tm.opcode_modifier & ShortForm)
2978 i.tm.base_opcode |= 8;
2980 i.tm.base_opcode |= 1;
2983 /* Now select between word & dword operations via the operand
2984 size prefix, except for instructions that will ignore this
2986 if (i.tm.base_opcode == 0x0f01 && i.tm.extension_opcode == 0xc8)
2988 /* monitor in SSE3 is a very special case. The default size
2989 of AX is the size of mode. The address size override
2990 prefix will change the size of AX. */
2991 if (i.op->regs[0].reg_type &
2992 (flag_code == CODE_32BIT ? Reg16 : Reg32))
2993 if (!add_prefix (ADDR_PREFIX_OPCODE))
2996 else if (i.suffix != QWORD_MNEM_SUFFIX
2997 && i.suffix != LONG_DOUBLE_MNEM_SUFFIX
2998 && !(i.tm.opcode_modifier & (IgnoreSize | FloatMF))
2999 && ((i.suffix == LONG_MNEM_SUFFIX) == (flag_code == CODE_16BIT)
3000 || (flag_code == CODE_64BIT
3001 && (i.tm.opcode_modifier & JumpByte))))
3003 unsigned int prefix = DATA_PREFIX_OPCODE;
3005 if (i.tm.opcode_modifier & JumpByte) /* jcxz, loop */
3006 prefix = ADDR_PREFIX_OPCODE;
3008 if (!add_prefix (prefix))
3012 /* Set mode64 for an operand. */
3013 if (i.suffix == QWORD_MNEM_SUFFIX
3014 && flag_code == CODE_64BIT
3015 && (i.tm.opcode_modifier & NoRex64) == 0)
3017 /* Special case for xchg %rax,%rax. It is NOP and doesn't
3020 || i.types [0] != (Acc | Reg64)
3021 || i.types [1] != (Acc | Reg64)
3022 || i.tm.base_opcode != 0x90)
3026 /* Size floating point instruction. */
3027 if (i.suffix == LONG_MNEM_SUFFIX)
3028 if (i.tm.opcode_modifier & FloatMF)
3029 i.tm.base_opcode ^= 4;
3036 check_byte_reg (void)
3040 for (op = i.operands; --op >= 0;)
3042 /* If this is an eight bit register, it's OK. If it's the 16 or
3043 32 bit version of an eight bit register, we will just use the
3044 low portion, and that's OK too. */
3045 if (i.types[op] & Reg8)
3048 /* movzx and movsx should not generate this warning. */
3050 && (i.tm.base_opcode == 0xfb7
3051 || i.tm.base_opcode == 0xfb6
3052 || i.tm.base_opcode == 0x63
3053 || i.tm.base_opcode == 0xfbe
3054 || i.tm.base_opcode == 0xfbf))
3057 /* crc32 doesn't generate this warning. */
3058 if (i.tm.base_opcode == 0xf20f38f0)
3061 if ((i.types[op] & WordReg) && i.op[op].regs->reg_num < 4)
3063 /* Prohibit these changes in the 64bit mode, since the
3064 lowering is more complicated. */
3065 if (flag_code == CODE_64BIT
3066 && (i.tm.operand_types[op] & InOutPortReg) == 0)
3068 as_bad (_("Incorrect register `%s%s' used with `%c' suffix"),
3069 register_prefix, i.op[op].regs->reg_name,
3073 #if REGISTER_WARNINGS
3075 && (i.tm.operand_types[op] & InOutPortReg) == 0)
3076 as_warn (_("using `%s%s' instead of `%s%s' due to `%c' suffix"),
3078 (i.op[op].regs + (i.types[op] & Reg16
3079 ? REGNAM_AL - REGNAM_AX
3080 : REGNAM_AL - REGNAM_EAX))->reg_name,
3082 i.op[op].regs->reg_name,
3087 /* Any other register is bad. */
3088 if (i.types[op] & (Reg | RegMMX | RegXMM
3090 | Control | Debug | Test
3091 | FloatReg | FloatAcc))
3093 as_bad (_("`%s%s' not allowed with `%s%c'"),
3095 i.op[op].regs->reg_name,
3105 check_long_reg (void)
3109 for (op = i.operands; --op >= 0;)
3110 /* Reject eight bit registers, except where the template requires
3111 them. (eg. movzb) */
3112 if ((i.types[op] & Reg8) != 0
3113 && (i.tm.operand_types[op] & (Reg16 | Reg32 | Acc)) != 0)
3115 as_bad (_("`%s%s' not allowed with `%s%c'"),
3117 i.op[op].regs->reg_name,
3122 /* Warn if the e prefix on a general reg is missing. */
3123 else if ((!quiet_warnings || flag_code == CODE_64BIT)
3124 && (i.types[op] & Reg16) != 0
3125 && (i.tm.operand_types[op] & (Reg32 | Acc)) != 0)
3127 /* Prohibit these changes in the 64bit mode, since the
3128 lowering is more complicated. */
3129 if (flag_code == CODE_64BIT)
3131 as_bad (_("Incorrect register `%s%s' used with `%c' suffix"),
3132 register_prefix, i.op[op].regs->reg_name,
3136 #if REGISTER_WARNINGS
3138 as_warn (_("using `%s%s' instead of `%s%s' due to `%c' suffix"),
3140 (i.op[op].regs + REGNAM_EAX - REGNAM_AX)->reg_name,
3142 i.op[op].regs->reg_name,
3146 /* Warn if the r prefix on a general reg is missing. */
3147 else if ((i.types[op] & Reg64) != 0
3148 && (i.tm.operand_types[op] & (Reg32 | Acc)) != 0)
3150 as_bad (_("Incorrect register `%s%s' used with `%c' suffix"),
3151 register_prefix, i.op[op].regs->reg_name,
3159 check_qword_reg (void)
3163 for (op = i.operands; --op >= 0; )
3164 /* Reject eight bit registers, except where the template requires
3165 them. (eg. movzb) */
3166 if ((i.types[op] & Reg8) != 0
3167 && (i.tm.operand_types[op] & (Reg16 | Reg32 | Acc)) != 0)
3169 as_bad (_("`%s%s' not allowed with `%s%c'"),
3171 i.op[op].regs->reg_name,
3176 /* Warn if the e prefix on a general reg is missing. */
3177 else if (((i.types[op] & Reg16) != 0
3178 || (i.types[op] & Reg32) != 0)
3179 && (i.tm.operand_types[op] & (Reg32 | Acc)) != 0)
3181 /* Prohibit these changes in the 64bit mode, since the
3182 lowering is more complicated. */
3183 as_bad (_("Incorrect register `%s%s' used with `%c' suffix"),
3184 register_prefix, i.op[op].regs->reg_name,
3192 check_word_reg (void)
3195 for (op = i.operands; --op >= 0;)
3196 /* Reject eight bit registers, except where the template requires
3197 them. (eg. movzb) */
3198 if ((i.types[op] & Reg8) != 0
3199 && (i.tm.operand_types[op] & (Reg16 | Reg32 | Acc)) != 0)
3201 as_bad (_("`%s%s' not allowed with `%s%c'"),
3203 i.op[op].regs->reg_name,
3208 /* Warn if the e prefix on a general reg is present. */
3209 else if ((!quiet_warnings || flag_code == CODE_64BIT)
3210 && (i.types[op] & Reg32) != 0
3211 && (i.tm.operand_types[op] & (Reg16 | Acc)) != 0)
3213 /* Prohibit these changes in the 64bit mode, since the
3214 lowering is more complicated. */
3215 if (flag_code == CODE_64BIT)
3217 as_bad (_("Incorrect register `%s%s' used with `%c' suffix"),
3218 register_prefix, i.op[op].regs->reg_name,
3223 #if REGISTER_WARNINGS
3224 as_warn (_("using `%s%s' instead of `%s%s' due to `%c' suffix"),
3226 (i.op[op].regs + REGNAM_AX - REGNAM_EAX)->reg_name,
3228 i.op[op].regs->reg_name,
3238 unsigned int overlap0, overlap1, overlap2;
3240 overlap0 = i.types[0] & i.tm.operand_types[0];
3241 if ((overlap0 & (Imm8 | Imm8S | Imm16 | Imm32 | Imm32S | Imm64))
3242 && overlap0 != Imm8 && overlap0 != Imm8S
3243 && overlap0 != Imm16 && overlap0 != Imm32S
3244 && overlap0 != Imm32 && overlap0 != Imm64)
3248 overlap0 &= (i.suffix == BYTE_MNEM_SUFFIX
3250 : (i.suffix == WORD_MNEM_SUFFIX
3252 : (i.suffix == QWORD_MNEM_SUFFIX
3256 else if (overlap0 == (Imm16 | Imm32S | Imm32)
3257 || overlap0 == (Imm16 | Imm32)
3258 || overlap0 == (Imm16 | Imm32S))
3260 overlap0 = ((flag_code == CODE_16BIT) ^ (i.prefix[DATA_PREFIX] != 0)
3263 if (overlap0 != Imm8 && overlap0 != Imm8S
3264 && overlap0 != Imm16 && overlap0 != Imm32S
3265 && overlap0 != Imm32 && overlap0 != Imm64)
3267 as_bad (_("no instruction mnemonic suffix given; "
3268 "can't determine immediate size"));
3272 i.types[0] = overlap0;
3274 overlap1 = i.types[1] & i.tm.operand_types[1];
3275 if ((overlap1 & (Imm8 | Imm8S | Imm16 | Imm32S | Imm32 | Imm64))
3276 && overlap1 != Imm8 && overlap1 != Imm8S
3277 && overlap1 != Imm16 && overlap1 != Imm32S
3278 && overlap1 != Imm32 && overlap1 != Imm64)
3282 overlap1 &= (i.suffix == BYTE_MNEM_SUFFIX
3284 : (i.suffix == WORD_MNEM_SUFFIX
3286 : (i.suffix == QWORD_MNEM_SUFFIX
3290 else if (overlap1 == (Imm16 | Imm32 | Imm32S)
3291 || overlap1 == (Imm16 | Imm32)
3292 || overlap1 == (Imm16 | Imm32S))
3294 overlap1 = ((flag_code == CODE_16BIT) ^ (i.prefix[DATA_PREFIX] != 0)
3297 if (overlap1 != Imm8 && overlap1 != Imm8S
3298 && overlap1 != Imm16 && overlap1 != Imm32S
3299 && overlap1 != Imm32 && overlap1 != Imm64)
3301 as_bad (_("no instruction mnemonic suffix given; "
3302 "can't determine immediate size %x %c"),
3303 overlap1, i.suffix);
3307 i.types[1] = overlap1;
3309 overlap2 = i.types[2] & i.tm.operand_types[2];
3310 assert ((overlap2 & Imm) == 0);
3311 i.types[2] = overlap2;
3317 process_operands (void)
3319 /* Default segment register this instruction will use for memory
3320 accesses. 0 means unknown. This is only for optimizing out
3321 unnecessary segment overrides. */
3322 const seg_entry *default_seg = 0;
3324 /* The imul $imm, %reg instruction is converted into
3325 imul $imm, %reg, %reg, and the clr %reg instruction
3326 is converted into xor %reg, %reg. */
3327 if (i.tm.opcode_modifier & regKludge)
3329 if ((i.tm.cpu_flags & CpuSSE4_1))
3331 /* The first operand in instruction blendvpd, blendvps and
3332 pblendvb in SSE4.1 is implicit and must be xmm0. */
3333 assert (i.operands == 3
3334 && i.reg_operands >= 2
3335 && i.types[0] == RegXMM);
3336 if (i.op[0].regs->reg_num != 0)
3339 as_bad (_("the last operand of `%s' must be `%sxmm0'"),
3340 i.tm.name, register_prefix);
3342 as_bad (_("the first operand of `%s' must be `%sxmm0'"),
3343 i.tm.name, register_prefix);
3348 i.types[0] = i.types[1];
3349 i.types[1] = i.types[2];
3353 /* We need to adjust fields in i.tm since they are used by
3354 build_modrm_byte. */
3355 i.tm.operand_types [0] = i.tm.operand_types [1];
3356 i.tm.operand_types [1] = i.tm.operand_types [2];
3361 unsigned int first_reg_op = (i.types[0] & Reg) ? 0 : 1;
3362 /* Pretend we saw the extra register operand. */
3363 assert (i.reg_operands == 1
3364 && i.op[first_reg_op + 1].regs == 0);
3365 i.op[first_reg_op + 1].regs = i.op[first_reg_op].regs;
3366 i.types[first_reg_op + 1] = i.types[first_reg_op];
3372 if (i.tm.opcode_modifier & ShortForm)
3374 if (i.types[0] & (SReg2 | SReg3))
3376 if (i.tm.base_opcode == POP_SEG_SHORT
3377 && i.op[0].regs->reg_num == 1)
3379 as_bad (_("you can't `pop %%cs'"));
3382 i.tm.base_opcode |= (i.op[0].regs->reg_num << 3);
3383 if ((i.op[0].regs->reg_flags & RegRex) != 0)
3388 /* The register or float register operand is in operand 0 or 1. */
3389 unsigned int op = (i.types[0] & (Reg | FloatReg)) ? 0 : 1;
3390 /* Register goes in low 3 bits of opcode. */
3391 i.tm.base_opcode |= i.op[op].regs->reg_num;
3392 if ((i.op[op].regs->reg_flags & RegRex) != 0)
3394 if (!quiet_warnings && (i.tm.opcode_modifier & Ugh) != 0)
3396 /* Warn about some common errors, but press on regardless.
3397 The first case can be generated by gcc (<= 2.8.1). */
3398 if (i.operands == 2)
3400 /* Reversed arguments on faddp, fsubp, etc. */
3401 as_warn (_("translating to `%s %s%s,%s%s'"), i.tm.name,
3402 register_prefix, i.op[1].regs->reg_name,
3403 register_prefix, i.op[0].regs->reg_name);
3407 /* Extraneous `l' suffix on fp insn. */
3408 as_warn (_("translating to `%s %s%s'"), i.tm.name,
3409 register_prefix, i.op[0].regs->reg_name);
3414 else if (i.tm.opcode_modifier & Modrm)
3416 /* The opcode is completed (modulo i.tm.extension_opcode which
3417 must be put into the modrm byte). Now, we make the modrm and
3418 index base bytes based on all the info we've collected. */
3420 default_seg = build_modrm_byte ();
3422 else if ((i.tm.base_opcode & ~0x3) == MOV_AX_DISP32)
3426 else if ((i.tm.opcode_modifier & IsString) != 0)
3428 /* For the string instructions that allow a segment override
3429 on one of their operands, the default segment is ds. */
3433 if ((i.tm.base_opcode == 0x8d /* lea */
3434 || (i.tm.cpu_flags & CpuSVME))
3435 && i.seg[0] && !quiet_warnings)
3436 as_warn (_("segment override on `%s' is ineffectual"), i.tm.name);
3438 /* If a segment was explicitly specified, and the specified segment
3439 is not the default, use an opcode prefix to select it. If we
3440 never figured out what the default segment is, then default_seg
3441 will be zero at this point, and the specified segment prefix will
3443 if ((i.seg[0]) && (i.seg[0] != default_seg))
3445 if (!add_prefix (i.seg[0]->seg_prefix))
3451 static const seg_entry *
3452 build_modrm_byte (void)
3454 const seg_entry *default_seg = 0;
3456 /* i.reg_operands MUST be the number of real register operands;
3457 implicit registers do not count. */
3458 if (i.reg_operands == 2)
3460 unsigned int source, dest;
3468 /* When there are 3 operands, one of them may be immediate,
3469 which may be the first or the last operand. Otherwise,
3470 the first operand must be shift count register (cl). */
3471 assert (i.imm_operands == 1
3472 || (i.imm_operands == 0
3473 && (i.types[0] & ShiftCount)));
3474 source = (i.types[0] & (Imm | ShiftCount)) ? 1 : 0;
3477 /* When there are 4 operands, the first two must be immediate
3478 operands. The source operand will be the 3rd one. */
3479 assert (i.imm_operands == 2
3480 && (i.types[0] & Imm)
3481 && (i.types[1] & Imm));
3491 /* One of the register operands will be encoded in the i.tm.reg
3492 field, the other in the combined i.tm.mode and i.tm.regmem
3493 fields. If no form of this instruction supports a memory
3494 destination operand, then we assume the source operand may
3495 sometimes be a memory operand and so we need to store the
3496 destination in the i.rm.reg field. */
3497 if ((i.tm.operand_types[dest] & (AnyMem | RegMem)) == 0)
3499 i.rm.reg = i.op[dest].regs->reg_num;
3500 i.rm.regmem = i.op[source].regs->reg_num;
3501 if ((i.op[dest].regs->reg_flags & RegRex) != 0)
3503 if ((i.op[source].regs->reg_flags & RegRex) != 0)
3508 i.rm.reg = i.op[source].regs->reg_num;
3509 i.rm.regmem = i.op[dest].regs->reg_num;
3510 if ((i.op[dest].regs->reg_flags & RegRex) != 0)
3512 if ((i.op[source].regs->reg_flags & RegRex) != 0)
3515 if (flag_code != CODE_64BIT && (i.rex & (REX_R | REX_B)))
3517 if (!((i.types[0] | i.types[1]) & Control))
3519 i.rex &= ~(REX_R | REX_B);
3520 add_prefix (LOCK_PREFIX_OPCODE);
3524 { /* If it's not 2 reg operands... */
3527 unsigned int fake_zero_displacement = 0;
3530 for (op = 0; op < i.operands; op++)
3531 if ((i.types[op] & AnyMem))
3533 assert (op < i.operands);
3537 if (i.base_reg == 0)
3540 if (!i.disp_operands)
3541 fake_zero_displacement = 1;
3542 if (i.index_reg == 0)
3544 /* Operand is just <disp> */
3545 if (flag_code == CODE_64BIT)
3547 /* 64bit mode overwrites the 32bit absolute
3548 addressing by RIP relative addressing and
3549 absolute addressing is encoded by one of the
3550 redundant SIB forms. */
3551 i.rm.regmem = ESCAPE_TO_TWO_BYTE_ADDRESSING;
3552 i.sib.base = NO_BASE_REGISTER;
3553 i.sib.index = NO_INDEX_REGISTER;
3554 i.types[op] = ((i.prefix[ADDR_PREFIX] == 0)
3555 ? Disp32S : Disp32);
3557 else if ((flag_code == CODE_16BIT)
3558 ^ (i.prefix[ADDR_PREFIX] != 0))
3560 i.rm.regmem = NO_BASE_REGISTER_16;
3561 i.types[op] = Disp16;
3565 i.rm.regmem = NO_BASE_REGISTER;
3566 i.types[op] = Disp32;
3569 else /* !i.base_reg && i.index_reg */
3571 i.sib.index = i.index_reg->reg_num;
3572 i.sib.base = NO_BASE_REGISTER;
3573 i.sib.scale = i.log2_scale_factor;
3574 i.rm.regmem = ESCAPE_TO_TWO_BYTE_ADDRESSING;
3575 i.types[op] &= ~Disp;
3576 if (flag_code != CODE_64BIT)
3577 i.types[op] |= Disp32; /* Must be 32 bit */
3579 i.types[op] |= Disp32S;
3580 if ((i.index_reg->reg_flags & RegRex) != 0)
3584 /* RIP addressing for 64bit mode. */
3585 else if (i.base_reg->reg_type == BaseIndex)
3587 i.rm.regmem = NO_BASE_REGISTER;
3588 i.types[op] &= ~ Disp;
3589 i.types[op] |= Disp32S;
3590 i.flags[op] |= Operand_PCrel;
3591 if (! i.disp_operands)
3592 fake_zero_displacement = 1;
3594 else if (i.base_reg->reg_type & Reg16)
3596 switch (i.base_reg->reg_num)
3599 if (i.index_reg == 0)
3601 else /* (%bx,%si) -> 0, or (%bx,%di) -> 1 */
3602 i.rm.regmem = i.index_reg->reg_num - 6;
3606 if (i.index_reg == 0)
3609 if ((i.types[op] & Disp) == 0)
3611 /* fake (%bp) into 0(%bp) */
3612 i.types[op] |= Disp8;
3613 fake_zero_displacement = 1;
3616 else /* (%bp,%si) -> 2, or (%bp,%di) -> 3 */
3617 i.rm.regmem = i.index_reg->reg_num - 6 + 2;
3619 default: /* (%si) -> 4 or (%di) -> 5 */
3620 i.rm.regmem = i.base_reg->reg_num - 6 + 4;
3622 i.rm.mode = mode_from_disp_size (i.types[op]);
3624 else /* i.base_reg and 32/64 bit mode */
3626 if (flag_code == CODE_64BIT
3627 && (i.types[op] & Disp))
3628 i.types[op] = ((i.types[op] & Disp8)
3629 | (i.prefix[ADDR_PREFIX] == 0
3630 ? Disp32S : Disp32));
3632 i.rm.regmem = i.base_reg->reg_num;
3633 if ((i.base_reg->reg_flags & RegRex) != 0)
3635 i.sib.base = i.base_reg->reg_num;
3636 /* x86-64 ignores REX prefix bit here to avoid decoder
3638 if ((i.base_reg->reg_num & 7) == EBP_REG_NUM)
3641 if (i.disp_operands == 0)
3643 fake_zero_displacement = 1;
3644 i.types[op] |= Disp8;
3647 else if (i.base_reg->reg_num == ESP_REG_NUM)
3651 i.sib.scale = i.log2_scale_factor;
3652 if (i.index_reg == 0)
3654 /* <disp>(%esp) becomes two byte modrm with no index
3655 register. We've already stored the code for esp
3656 in i.rm.regmem ie. ESCAPE_TO_TWO_BYTE_ADDRESSING.
3657 Any base register besides %esp will not use the
3658 extra modrm byte. */
3659 i.sib.index = NO_INDEX_REGISTER;
3660 #if !SCALE1_WHEN_NO_INDEX
3661 /* Another case where we force the second modrm byte. */
3662 if (i.log2_scale_factor)
3663 i.rm.regmem = ESCAPE_TO_TWO_BYTE_ADDRESSING;
3668 i.sib.index = i.index_reg->reg_num;
3669 i.rm.regmem = ESCAPE_TO_TWO_BYTE_ADDRESSING;
3670 if ((i.index_reg->reg_flags & RegRex) != 0)
3675 && (i.reloc[op] == BFD_RELOC_386_TLS_DESC_CALL
3676 || i.reloc[op] == BFD_RELOC_X86_64_TLSDESC_CALL))
3679 i.rm.mode = mode_from_disp_size (i.types[op]);
3682 if (fake_zero_displacement)
3684 /* Fakes a zero displacement assuming that i.types[op]
3685 holds the correct displacement size. */
3688 assert (i.op[op].disps == 0);
3689 exp = &disp_expressions[i.disp_operands++];
3690 i.op[op].disps = exp;
3691 exp->X_op = O_constant;
3692 exp->X_add_number = 0;
3693 exp->X_add_symbol = (symbolS *) 0;
3694 exp->X_op_symbol = (symbolS *) 0;
3698 /* Fill in i.rm.reg or i.rm.regmem field with register operand
3699 (if any) based on i.tm.extension_opcode. Again, we must be
3700 careful to make sure that segment/control/debug/test/MMX
3701 registers are coded into the i.rm.reg field. */
3706 for (op = 0; op < i.operands; op++)
3707 if ((i.types[op] & (Reg | RegMMX | RegXMM
3709 | Control | Debug | Test)))
3711 assert (op < i.operands);
3713 /* If there is an extension opcode to put here, the register
3714 number must be put into the regmem field. */
3715 if (i.tm.extension_opcode != None)
3717 i.rm.regmem = i.op[op].regs->reg_num;
3718 if ((i.op[op].regs->reg_flags & RegRex) != 0)
3723 i.rm.reg = i.op[op].regs->reg_num;
3724 if ((i.op[op].regs->reg_flags & RegRex) != 0)
3728 /* Now, if no memory operand has set i.rm.mode = 0, 1, 2 we
3729 must set it to 3 to indicate this is a register operand
3730 in the regmem field. */
3731 if (!i.mem_operands)
3735 /* Fill in i.rm.reg field with extension opcode (if any). */
3736 if (i.tm.extension_opcode != None)
3737 i.rm.reg = i.tm.extension_opcode;
3743 output_branch (void)
3748 relax_substateT subtype;
3753 if (flag_code == CODE_16BIT)
3757 if (i.prefix[DATA_PREFIX] != 0)
3763 /* Pentium4 branch hints. */
3764 if (i.prefix[SEG_PREFIX] == CS_PREFIX_OPCODE /* not taken */
3765 || i.prefix[SEG_PREFIX] == DS_PREFIX_OPCODE /* taken */)
3770 if (i.prefix[REX_PREFIX] != 0)
3776 if (i.prefixes != 0 && !intel_syntax)
3777 as_warn (_("skipping prefixes on this instruction"));
3779 /* It's always a symbol; End frag & setup for relax.
3780 Make sure there is enough room in this frag for the largest
3781 instruction we may generate in md_convert_frag. This is 2
3782 bytes for the opcode and room for the prefix and largest
3784 frag_grow (prefix + 2 + 4);
3785 /* Prefix and 1 opcode byte go in fr_fix. */
3786 p = frag_more (prefix + 1);
3787 if (i.prefix[DATA_PREFIX] != 0)
3788 *p++ = DATA_PREFIX_OPCODE;
3789 if (i.prefix[SEG_PREFIX] == CS_PREFIX_OPCODE
3790 || i.prefix[SEG_PREFIX] == DS_PREFIX_OPCODE)
3791 *p++ = i.prefix[SEG_PREFIX];
3792 if (i.prefix[REX_PREFIX] != 0)
3793 *p++ = i.prefix[REX_PREFIX];
3794 *p = i.tm.base_opcode;
3796 if ((unsigned char) *p == JUMP_PC_RELATIVE)
3797 subtype = ENCODE_RELAX_STATE (UNCOND_JUMP, SMALL);
3798 else if ((cpu_arch_flags & Cpu386) != 0)
3799 subtype = ENCODE_RELAX_STATE (COND_JUMP, SMALL);
3801 subtype = ENCODE_RELAX_STATE (COND_JUMP86, SMALL);
3804 sym = i.op[0].disps->X_add_symbol;
3805 off = i.op[0].disps->X_add_number;
3807 if (i.op[0].disps->X_op != O_constant
3808 && i.op[0].disps->X_op != O_symbol)
3810 /* Handle complex expressions. */
3811 sym = make_expr_symbol (i.op[0].disps);
3815 /* 1 possible extra opcode + 4 byte displacement go in var part.
3816 Pass reloc in fr_var. */
3817 frag_var (rs_machine_dependent, 5, i.reloc[0], subtype, sym, off, p);
3827 if (i.tm.opcode_modifier & JumpByte)
3829 /* This is a loop or jecxz type instruction. */
3831 if (i.prefix[ADDR_PREFIX] != 0)
3833 FRAG_APPEND_1_CHAR (ADDR_PREFIX_OPCODE);
3836 /* Pentium4 branch hints. */
3837 if (i.prefix[SEG_PREFIX] == CS_PREFIX_OPCODE /* not taken */
3838 || i.prefix[SEG_PREFIX] == DS_PREFIX_OPCODE /* taken */)
3840 FRAG_APPEND_1_CHAR (i.prefix[SEG_PREFIX]);
3849 if (flag_code == CODE_16BIT)
3852 if (i.prefix[DATA_PREFIX] != 0)
3854 FRAG_APPEND_1_CHAR (DATA_PREFIX_OPCODE);
3864 if (i.prefix[REX_PREFIX] != 0)
3866 FRAG_APPEND_1_CHAR (i.prefix[REX_PREFIX]);
3870 if (i.prefixes != 0 && !intel_syntax)
3871 as_warn (_("skipping prefixes on this instruction"));
3873 p = frag_more (1 + size);
3874 *p++ = i.tm.base_opcode;
3876 fixP = fix_new_exp (frag_now, p - frag_now->fr_literal, size,
3877 i.op[0].disps, 1, reloc (size, 1, 1, i.reloc[0]));
3879 /* All jumps handled here are signed, but don't use a signed limit
3880 check for 32 and 16 bit jumps as we want to allow wrap around at
3881 4G and 64k respectively. */
3883 fixP->fx_signed = 1;
3887 output_interseg_jump (void)
3895 if (flag_code == CODE_16BIT)
3899 if (i.prefix[DATA_PREFIX] != 0)
3905 if (i.prefix[REX_PREFIX] != 0)
3915 if (i.prefixes != 0 && !intel_syntax)
3916 as_warn (_("skipping prefixes on this instruction"));
3918 /* 1 opcode; 2 segment; offset */
3919 p = frag_more (prefix + 1 + 2 + size);
3921 if (i.prefix[DATA_PREFIX] != 0)
3922 *p++ = DATA_PREFIX_OPCODE;
3924 if (i.prefix[REX_PREFIX] != 0)
3925 *p++ = i.prefix[REX_PREFIX];
3927 *p++ = i.tm.base_opcode;
3928 if (i.op[1].imms->X_op == O_constant)
3930 offsetT n = i.op[1].imms->X_add_number;
3933 && !fits_in_unsigned_word (n)
3934 && !fits_in_signed_word (n))
3936 as_bad (_("16-bit jump out of range"));
3939 md_number_to_chars (p, n, size);
3942 fix_new_exp (frag_now, p - frag_now->fr_literal, size,
3943 i.op[1].imms, 0, reloc (size, 0, 0, i.reloc[1]));
3944 if (i.op[0].imms->X_op != O_constant)
3945 as_bad (_("can't handle non absolute segment in `%s'"),
3947 md_number_to_chars (p + size, (valueT) i.op[0].imms->X_add_number, 2);
3953 fragS *insn_start_frag;
3954 offsetT insn_start_off;
3956 /* Tie dwarf2 debug info to the address at the start of the insn.
3957 We can't do this after the insn has been output as the current
3958 frag may have been closed off. eg. by frag_var. */
3959 dwarf2_emit_insn (0);
3961 insn_start_frag = frag_now;
3962 insn_start_off = frag_now_fix ();
3965 if (i.tm.opcode_modifier & Jump)
3967 else if (i.tm.opcode_modifier & (JumpByte | JumpDword))
3969 else if (i.tm.opcode_modifier & JumpInterSegment)
3970 output_interseg_jump ();
3973 /* Output normal instructions here. */
3976 unsigned int prefix;
3978 /* All opcodes on i386 have either 1 or 2 bytes. SSSE3 and
3979 SSE4 instructions have 3 bytes. We may use one more higher
3980 byte to specify a prefix the instruction requires. Exclude
3981 instructions which are in both SSE4 and ABM. */
3982 if ((i.tm.cpu_flags & (CpuSSSE3 | CpuSSE4)) != 0
3983 && (i.tm.cpu_flags & CpuABM) == 0)
3985 if (i.tm.base_opcode & 0xff000000)
3987 prefix = (i.tm.base_opcode >> 24) & 0xff;
3991 else if ((i.tm.base_opcode & 0xff0000) != 0)
3993 prefix = (i.tm.base_opcode >> 16) & 0xff;
3994 if ((i.tm.cpu_flags & CpuPadLock) != 0)
3997 if (prefix != REPE_PREFIX_OPCODE
3998 || i.prefix[LOCKREP_PREFIX] != REPE_PREFIX_OPCODE)
3999 add_prefix (prefix);
4002 add_prefix (prefix);
4005 /* The prefix bytes. */
4007 q < i.prefix + sizeof (i.prefix) / sizeof (i.prefix[0]);
4013 md_number_to_chars (p, (valueT) *q, 1);
4017 /* Now the opcode; be careful about word order here! */
4018 if (fits_in_unsigned_byte (i.tm.base_opcode))
4020 FRAG_APPEND_1_CHAR (i.tm.base_opcode);
4024 if ((i.tm.cpu_flags & (CpuSSSE3 | CpuSSE4)) != 0
4025 && (i.tm.cpu_flags & CpuABM) == 0)
4028 *p++ = (i.tm.base_opcode >> 16) & 0xff;
4033 /* Put out high byte first: can't use md_number_to_chars! */
4034 *p++ = (i.tm.base_opcode >> 8) & 0xff;
4035 *p = i.tm.base_opcode & 0xff;
4038 /* Now the modrm byte and sib byte (if present). */
4039 if (i.tm.opcode_modifier & Modrm)
4042 md_number_to_chars (p,
4043 (valueT) (i.rm.regmem << 0
4047 /* If i.rm.regmem == ESP (4)
4048 && i.rm.mode != (Register mode)
4050 ==> need second modrm byte. */
4051 if (i.rm.regmem == ESCAPE_TO_TWO_BYTE_ADDRESSING
4053 && !(i.base_reg && (i.base_reg->reg_type & Reg16) != 0))
4056 md_number_to_chars (p,
4057 (valueT) (i.sib.base << 0
4059 | i.sib.scale << 6),
4064 if (i.disp_operands)
4065 output_disp (insn_start_frag, insn_start_off);
4068 output_imm (insn_start_frag, insn_start_off);
4074 pi ("" /*line*/, &i);
4076 #endif /* DEBUG386 */
4080 output_disp (fragS *insn_start_frag, offsetT insn_start_off)
4085 for (n = 0; n < i.operands; n++)
4087 if (i.types[n] & Disp)
4089 if (i.op[n].disps->X_op == O_constant)
4095 if (i.types[n] & (Disp8 | Disp16 | Disp64))
4098 if (i.types[n] & Disp8)
4100 if (i.types[n] & Disp64)
4103 val = offset_in_range (i.op[n].disps->X_add_number,
4105 p = frag_more (size);
4106 md_number_to_chars (p, val, size);
4110 enum bfd_reloc_code_real reloc_type;
4113 int pcrel = (i.flags[n] & Operand_PCrel) != 0;
4115 /* The PC relative address is computed relative
4116 to the instruction boundary, so in case immediate
4117 fields follows, we need to adjust the value. */
4118 if (pcrel && i.imm_operands)
4123 for (n1 = 0; n1 < i.operands; n1++)
4124 if (i.types[n1] & Imm)
4126 if (i.types[n1] & (Imm8 | Imm8S | Imm16 | Imm64))
4129 if (i.types[n1] & (Imm8 | Imm8S))
4131 if (i.types[n1] & Imm64)
4136 /* We should find the immediate. */
4137 if (n1 == i.operands)
4139 i.op[n].disps->X_add_number -= imm_size;
4142 if (i.types[n] & Disp32S)
4145 if (i.types[n] & (Disp16 | Disp64))
4148 if (i.types[n] & Disp64)
4152 p = frag_more (size);
4153 reloc_type = reloc (size, pcrel, sign, i.reloc[n]);
4155 && GOT_symbol == i.op[n].disps->X_add_symbol
4156 && (((reloc_type == BFD_RELOC_32
4157 || reloc_type == BFD_RELOC_X86_64_32S
4158 || (reloc_type == BFD_RELOC_64
4160 && (i.op[n].disps->X_op == O_symbol
4161 || (i.op[n].disps->X_op == O_add
4162 && ((symbol_get_value_expression
4163 (i.op[n].disps->X_op_symbol)->X_op)
4165 || reloc_type == BFD_RELOC_32_PCREL))
4169 if (insn_start_frag == frag_now)
4170 add = (p - frag_now->fr_literal) - insn_start_off;
4175 add = insn_start_frag->fr_fix - insn_start_off;
4176 for (fr = insn_start_frag->fr_next;
4177 fr && fr != frag_now; fr = fr->fr_next)
4179 add += p - frag_now->fr_literal;
4184 reloc_type = BFD_RELOC_386_GOTPC;
4185 i.op[n].imms->X_add_number += add;
4187 else if (reloc_type == BFD_RELOC_64)
4188 reloc_type = BFD_RELOC_X86_64_GOTPC64;
4190 /* Don't do the adjustment for x86-64, as there
4191 the pcrel addressing is relative to the _next_
4192 insn, and that is taken care of in other code. */
4193 reloc_type = BFD_RELOC_X86_64_GOTPC32;
4195 fix_new_exp (frag_now, p - frag_now->fr_literal, size,
4196 i.op[n].disps, pcrel, reloc_type);
4203 output_imm (fragS *insn_start_frag, offsetT insn_start_off)
4208 for (n = 0; n < i.operands; n++)
4210 if (i.types[n] & Imm)
4212 if (i.op[n].imms->X_op == O_constant)
4218 if (i.types[n] & (Imm8 | Imm8S | Imm16 | Imm64))
4221 if (i.types[n] & (Imm8 | Imm8S))
4223 else if (i.types[n] & Imm64)
4226 val = offset_in_range (i.op[n].imms->X_add_number,
4228 p = frag_more (size);
4229 md_number_to_chars (p, val, size);
4233 /* Not absolute_section.
4234 Need a 32-bit fixup (don't support 8bit
4235 non-absolute imms). Try to support other
4237 enum bfd_reloc_code_real reloc_type;
4241 if ((i.types[n] & (Imm32S))
4242 && (i.suffix == QWORD_MNEM_SUFFIX
4243 || (!i.suffix && (i.tm.opcode_modifier & No_lSuf))))
4245 if (i.types[n] & (Imm8 | Imm8S | Imm16 | Imm64))
4248 if (i.types[n] & (Imm8 | Imm8S))
4250 if (i.types[n] & Imm64)
4254 p = frag_more (size);
4255 reloc_type = reloc (size, 0, sign, i.reloc[n]);
4257 /* This is tough to explain. We end up with this one if we
4258 * have operands that look like
4259 * "_GLOBAL_OFFSET_TABLE_+[.-.L284]". The goal here is to
4260 * obtain the absolute address of the GOT, and it is strongly
4261 * preferable from a performance point of view to avoid using
4262 * a runtime relocation for this. The actual sequence of
4263 * instructions often look something like:
4268 * addl $_GLOBAL_OFFSET_TABLE_+[.-.L66],%ebx
4270 * The call and pop essentially return the absolute address
4271 * of the label .L66 and store it in %ebx. The linker itself
4272 * will ultimately change the first operand of the addl so
4273 * that %ebx points to the GOT, but to keep things simple, the
4274 * .o file must have this operand set so that it generates not
4275 * the absolute address of .L66, but the absolute address of
4276 * itself. This allows the linker itself simply treat a GOTPC
4277 * relocation as asking for a pcrel offset to the GOT to be
4278 * added in, and the addend of the relocation is stored in the
4279 * operand field for the instruction itself.
4281 * Our job here is to fix the operand so that it would add
4282 * the correct offset so that %ebx would point to itself. The
4283 * thing that is tricky is that .-.L66 will point to the
4284 * beginning of the instruction, so we need to further modify
4285 * the operand so that it will point to itself. There are
4286 * other cases where you have something like:
4288 * .long $_GLOBAL_OFFSET_TABLE_+[.-.L66]
4290 * and here no correction would be required. Internally in
4291 * the assembler we treat operands of this form as not being
4292 * pcrel since the '.' is explicitly mentioned, and I wonder
4293 * whether it would simplify matters to do it this way. Who
4294 * knows. In earlier versions of the PIC patches, the
4295 * pcrel_adjust field was used to store the correction, but
4296 * since the expression is not pcrel, I felt it would be
4297 * confusing to do it this way. */
4299 if ((reloc_type == BFD_RELOC_32
4300 || reloc_type == BFD_RELOC_X86_64_32S
4301 || reloc_type == BFD_RELOC_64)
4303 && GOT_symbol == i.op[n].imms->X_add_symbol
4304 && (i.op[n].imms->X_op == O_symbol
4305 || (i.op[n].imms->X_op == O_add
4306 && ((symbol_get_value_expression
4307 (i.op[n].imms->X_op_symbol)->X_op)
4312 if (insn_start_frag == frag_now)
4313 add = (p - frag_now->fr_literal) - insn_start_off;
4318 add = insn_start_frag->fr_fix - insn_start_off;
4319 for (fr = insn_start_frag->fr_next;
4320 fr && fr != frag_now; fr = fr->fr_next)
4322 add += p - frag_now->fr_literal;
4326 reloc_type = BFD_RELOC_386_GOTPC;
4328 reloc_type = BFD_RELOC_X86_64_GOTPC32;
4330 reloc_type = BFD_RELOC_X86_64_GOTPC64;
4331 i.op[n].imms->X_add_number += add;
4333 fix_new_exp (frag_now, p - frag_now->fr_literal, size,
4334 i.op[n].imms, 0, reloc_type);
4340 /* x86_cons_fix_new is called via the expression parsing code when a
4341 reloc is needed. We use this hook to get the correct .got reloc. */
4342 static enum bfd_reloc_code_real got_reloc = NO_RELOC;
4343 static int cons_sign = -1;
4346 x86_cons_fix_new (fragS *frag, unsigned int off, unsigned int len,
4349 enum bfd_reloc_code_real r = reloc (len, 0, cons_sign, got_reloc);
4351 got_reloc = NO_RELOC;
4354 if (exp->X_op == O_secrel)
4356 exp->X_op = O_symbol;
4357 r = BFD_RELOC_32_SECREL;
4361 fix_new_exp (frag, off, len, exp, 0, r);
4364 #if (!defined (OBJ_ELF) && !defined (OBJ_MAYBE_ELF)) || defined (LEX_AT)
4365 # define lex_got(reloc, adjust, types) NULL
4367 /* Parse operands of the form
4368 <symbol>@GOTOFF+<nnn>
4369 and similar .plt or .got references.
4371 If we find one, set up the correct relocation in RELOC and copy the
4372 input string, minus the `@GOTOFF' into a malloc'd buffer for
4373 parsing by the calling routine. Return this buffer, and if ADJUST
4374 is non-null set it to the length of the string we removed from the
4375 input line. Otherwise return NULL. */
4377 lex_got (enum bfd_reloc_code_real *reloc,
4379 unsigned int *types)
4381 /* Some of the relocations depend on the size of what field is to
4382 be relocated. But in our callers i386_immediate and i386_displacement
4383 we don't yet know the operand size (this will be set by insn
4384 matching). Hence we record the word32 relocation here,
4385 and adjust the reloc according to the real size in reloc(). */
4386 static const struct {
4388 const enum bfd_reloc_code_real rel[2];
4389 const unsigned int types64;
4392 BFD_RELOC_X86_64_PLTOFF64 },
4394 { "PLT", { BFD_RELOC_386_PLT32,
4395 BFD_RELOC_X86_64_PLT32 },
4396 Imm32 | Imm32S | Disp32 },
4398 BFD_RELOC_X86_64_GOTPLT64 },
4400 { "GOTOFF", { BFD_RELOC_386_GOTOFF,
4401 BFD_RELOC_X86_64_GOTOFF64 },
4404 BFD_RELOC_X86_64_GOTPCREL },
4405 Imm32 | Imm32S | Disp32 },
4406 { "TLSGD", { BFD_RELOC_386_TLS_GD,
4407 BFD_RELOC_X86_64_TLSGD },
4408 Imm32 | Imm32S | Disp32 },
4409 { "TLSLDM", { BFD_RELOC_386_TLS_LDM,
4413 BFD_RELOC_X86_64_TLSLD },
4414 Imm32 | Imm32S | Disp32 },
4415 { "GOTTPOFF", { BFD_RELOC_386_TLS_IE_32,
4416 BFD_RELOC_X86_64_GOTTPOFF },
4417 Imm32 | Imm32S | Disp32 },
4418 { "TPOFF", { BFD_RELOC_386_TLS_LE_32,
4419 BFD_RELOC_X86_64_TPOFF32 },
4420 Imm32 | Imm32S | Imm64 | Disp32 | Disp64 },
4421 { "NTPOFF", { BFD_RELOC_386_TLS_LE,
4424 { "DTPOFF", { BFD_RELOC_386_TLS_LDO_32,
4425 BFD_RELOC_X86_64_DTPOFF32 },
4426 Imm32 | Imm32S | Imm64 | Disp32 | Disp64 },
4427 { "GOTNTPOFF",{ BFD_RELOC_386_TLS_GOTIE,
4430 { "INDNTPOFF",{ BFD_RELOC_386_TLS_IE,
4433 { "GOT", { BFD_RELOC_386_GOT32,
4434 BFD_RELOC_X86_64_GOT32 },
4435 Imm32 | Imm32S | Disp32 | Imm64 },
4436 { "TLSDESC", { BFD_RELOC_386_TLS_GOTDESC,
4437 BFD_RELOC_X86_64_GOTPC32_TLSDESC },
4438 Imm32 | Imm32S | Disp32 },
4439 { "TLSCALL", { BFD_RELOC_386_TLS_DESC_CALL,
4440 BFD_RELOC_X86_64_TLSDESC_CALL },
4441 Imm32 | Imm32S | Disp32 }
4449 for (cp = input_line_pointer; *cp != '@'; cp++)
4450 if (is_end_of_line[(unsigned char) *cp])
4453 for (j = 0; j < sizeof (gotrel) / sizeof (gotrel[0]); j++)
4457 len = strlen (gotrel[j].str);
4458 if (strncasecmp (cp + 1, gotrel[j].str, len) == 0)
4460 if (gotrel[j].rel[object_64bit] != 0)
4463 char *tmpbuf, *past_reloc;
4465 *reloc = gotrel[j].rel[object_64bit];
4471 if (flag_code != CODE_64BIT)
4472 *types = Imm32 | Disp32;
4474 *types = gotrel[j].types64;
4477 if (GOT_symbol == NULL)
4478 GOT_symbol = symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME);
4480 /* The length of the first part of our input line. */
4481 first = cp - input_line_pointer;
4483 /* The second part goes from after the reloc token until
4484 (and including) an end_of_line char. Don't use strlen
4485 here as the end_of_line char may not be a NUL. */
4486 past_reloc = cp + 1 + len;
4487 for (cp = past_reloc; !is_end_of_line[(unsigned char) *cp++]; )
4489 second = cp - past_reloc;
4491 /* Allocate and copy string. The trailing NUL shouldn't
4492 be necessary, but be safe. */
4493 tmpbuf = xmalloc (first + second + 2);
4494 memcpy (tmpbuf, input_line_pointer, first);
4495 if (second != 0 && *past_reloc != ' ')
4496 /* Replace the relocation token with ' ', so that
4497 errors like foo@GOTOFF1 will be detected. */
4498 tmpbuf[first++] = ' ';
4499 memcpy (tmpbuf + first, past_reloc, second);
4500 tmpbuf[first + second] = '\0';
4504 as_bad (_("@%s reloc is not supported with %d-bit output format"),
4505 gotrel[j].str, 1 << (5 + object_64bit));
4510 /* Might be a symbol version string. Don't as_bad here. */
4515 x86_cons (expressionS *exp, int size)
4517 if (size == 4 || (object_64bit && size == 8))
4519 /* Handle @GOTOFF and the like in an expression. */
4521 char *gotfree_input_line;
4524 save = input_line_pointer;
4525 gotfree_input_line = lex_got (&got_reloc, &adjust, NULL);
4526 if (gotfree_input_line)
4527 input_line_pointer = gotfree_input_line;
4531 if (gotfree_input_line)
4533 /* expression () has merrily parsed up to the end of line,
4534 or a comma - in the wrong buffer. Transfer how far
4535 input_line_pointer has moved to the right buffer. */
4536 input_line_pointer = (save
4537 + (input_line_pointer - gotfree_input_line)
4539 free (gotfree_input_line);
4547 static void signed_cons (int size)
4549 if (flag_code == CODE_64BIT)
4557 pe_directive_secrel (dummy)
4558 int dummy ATTRIBUTE_UNUSED;
4565 if (exp.X_op == O_symbol)
4566 exp.X_op = O_secrel;
4568 emit_expr (&exp, 4);
4570 while (*input_line_pointer++ == ',');
4572 input_line_pointer--;
4573 demand_empty_rest_of_line ();
4578 i386_immediate (char *imm_start)
4580 char *save_input_line_pointer;
4581 char *gotfree_input_line;
4584 unsigned int types = ~0U;
4586 if (i.imm_operands == MAX_IMMEDIATE_OPERANDS)
4588 as_bad (_("at most %d immediate operands are allowed"),
4589 MAX_IMMEDIATE_OPERANDS);
4593 exp = &im_expressions[i.imm_operands++];
4594 i.op[this_operand].imms = exp;
4596 if (is_space_char (*imm_start))
4599 save_input_line_pointer = input_line_pointer;
4600 input_line_pointer = imm_start;
4602 gotfree_input_line = lex_got (&i.reloc[this_operand], NULL, &types);
4603 if (gotfree_input_line)
4604 input_line_pointer = gotfree_input_line;
4606 exp_seg = expression (exp);
4609 if (*input_line_pointer)
4610 as_bad (_("junk `%s' after expression"), input_line_pointer);
4612 input_line_pointer = save_input_line_pointer;
4613 if (gotfree_input_line)
4614 free (gotfree_input_line);
4616 if (exp->X_op == O_absent || exp->X_op == O_big)
4618 /* Missing or bad expr becomes absolute 0. */
4619 as_bad (_("missing or invalid immediate expression `%s' taken as 0"),
4621 exp->X_op = O_constant;
4622 exp->X_add_number = 0;
4623 exp->X_add_symbol = (symbolS *) 0;
4624 exp->X_op_symbol = (symbolS *) 0;
4626 else if (exp->X_op == O_constant)
4628 /* Size it properly later. */
4629 i.types[this_operand] |= Imm64;
4630 /* If BFD64, sign extend val. */
4631 if (!use_rela_relocations
4632 && (exp->X_add_number & ~(((addressT) 2 << 31) - 1)) == 0)
4634 = (exp->X_add_number ^ ((addressT) 1 << 31)) - ((addressT) 1 << 31);
4636 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
4637 else if (OUTPUT_FLAVOR == bfd_target_aout_flavour
4638 && exp_seg != absolute_section
4639 && exp_seg != text_section
4640 && exp_seg != data_section
4641 && exp_seg != bss_section
4642 && exp_seg != undefined_section
4643 && !bfd_is_com_section (exp_seg))
4645 as_bad (_("unimplemented segment %s in operand"), exp_seg->name);
4649 else if (!intel_syntax && exp->X_op == O_register)
4651 as_bad (_("illegal immediate register operand %s"), imm_start);
4656 /* This is an address. The size of the address will be
4657 determined later, depending on destination register,
4658 suffix, or the default for the section. */
4659 i.types[this_operand] |= Imm8 | Imm16 | Imm32 | Imm32S | Imm64;
4660 i.types[this_operand] &= types;
4667 i386_scale (char *scale)
4670 char *save = input_line_pointer;
4672 input_line_pointer = scale;
4673 val = get_absolute_expression ();
4678 i.log2_scale_factor = 0;
4681 i.log2_scale_factor = 1;
4684 i.log2_scale_factor = 2;
4687 i.log2_scale_factor = 3;
4691 char sep = *input_line_pointer;
4693 *input_line_pointer = '\0';
4694 as_bad (_("expecting scale factor of 1, 2, 4, or 8: got `%s'"),
4696 *input_line_pointer = sep;
4697 input_line_pointer = save;
4701 if (i.log2_scale_factor != 0 && i.index_reg == 0)
4703 as_warn (_("scale factor of %d without an index register"),
4704 1 << i.log2_scale_factor);
4705 #if SCALE1_WHEN_NO_INDEX
4706 i.log2_scale_factor = 0;
4709 scale = input_line_pointer;
4710 input_line_pointer = save;
4715 i386_displacement (char *disp_start, char *disp_end)
4719 char *save_input_line_pointer;
4720 char *gotfree_input_line;
4721 int bigdisp, override;
4722 unsigned int types = Disp;
4724 if (i.disp_operands == MAX_MEMORY_OPERANDS)
4726 as_bad (_("at most %d displacement operands are allowed"),
4727 MAX_MEMORY_OPERANDS);
4731 if ((i.types[this_operand] & JumpAbsolute)
4732 || !(current_templates->start->opcode_modifier & (Jump | JumpDword)))
4735 override = (i.prefix[ADDR_PREFIX] != 0);
4739 /* For PC-relative branches, the width of the displacement
4740 is dependent upon data size, not address size. */
4742 override = (i.prefix[DATA_PREFIX] != 0);
4744 if (flag_code == CODE_64BIT)
4747 bigdisp = ((override || i.suffix == WORD_MNEM_SUFFIX)
4749 : Disp32S | Disp32);
4751 bigdisp = Disp64 | Disp32S | Disp32;
4758 override = (i.suffix == (flag_code != CODE_16BIT
4760 : LONG_MNEM_SUFFIX));
4763 if ((flag_code == CODE_16BIT) ^ override)
4766 i.types[this_operand] |= bigdisp;
4768 exp = &disp_expressions[i.disp_operands];
4769 i.op[this_operand].disps = exp;
4771 save_input_line_pointer = input_line_pointer;
4772 input_line_pointer = disp_start;
4773 END_STRING_AND_SAVE (disp_end);
4775 #ifndef GCC_ASM_O_HACK
4776 #define GCC_ASM_O_HACK 0
4779 END_STRING_AND_SAVE (disp_end + 1);
4780 if ((i.types[this_operand] & BaseIndex) != 0
4781 && displacement_string_end[-1] == '+')
4783 /* This hack is to avoid a warning when using the "o"
4784 constraint within gcc asm statements.
4787 #define _set_tssldt_desc(n,addr,limit,type) \
4788 __asm__ __volatile__ ( \
4790 "movw %w1,2+%0\n\t" \
4792 "movb %b1,4+%0\n\t" \
4793 "movb %4,5+%0\n\t" \
4794 "movb $0,6+%0\n\t" \
4795 "movb %h1,7+%0\n\t" \
4797 : "=o"(*(n)) : "q" (addr), "ri"(limit), "i"(type))
4799 This works great except that the output assembler ends
4800 up looking a bit weird if it turns out that there is
4801 no offset. You end up producing code that looks like:
4814 So here we provide the missing zero. */
4816 *displacement_string_end = '0';
4819 gotfree_input_line = lex_got (&i.reloc[this_operand], NULL, &types);
4820 if (gotfree_input_line)
4821 input_line_pointer = gotfree_input_line;
4823 exp_seg = expression (exp);
4826 if (*input_line_pointer)
4827 as_bad (_("junk `%s' after expression"), input_line_pointer);
4829 RESTORE_END_STRING (disp_end + 1);
4831 RESTORE_END_STRING (disp_end);
4832 input_line_pointer = save_input_line_pointer;
4833 if (gotfree_input_line)
4834 free (gotfree_input_line);
4836 /* We do this to make sure that the section symbol is in
4837 the symbol table. We will ultimately change the relocation
4838 to be relative to the beginning of the section. */
4839 if (i.reloc[this_operand] == BFD_RELOC_386_GOTOFF
4840 || i.reloc[this_operand] == BFD_RELOC_X86_64_GOTPCREL
4841 || i.reloc[this_operand] == BFD_RELOC_X86_64_GOTOFF64)
4843 if (exp->X_op != O_symbol)
4845 as_bad (_("bad expression used with @%s"),
4846 (i.reloc[this_operand] == BFD_RELOC_X86_64_GOTPCREL
4852 if (S_IS_LOCAL (exp->X_add_symbol)
4853 && S_GET_SEGMENT (exp->X_add_symbol) != undefined_section)
4854 section_symbol (S_GET_SEGMENT (exp->X_add_symbol));
4855 exp->X_op = O_subtract;
4856 exp->X_op_symbol = GOT_symbol;
4857 if (i.reloc[this_operand] == BFD_RELOC_X86_64_GOTPCREL)
4858 i.reloc[this_operand] = BFD_RELOC_32_PCREL;
4859 else if (i.reloc[this_operand] == BFD_RELOC_X86_64_GOTOFF64)
4860 i.reloc[this_operand] = BFD_RELOC_64;
4862 i.reloc[this_operand] = BFD_RELOC_32;
4865 if (exp->X_op == O_absent || exp->X_op == O_big)
4867 /* Missing or bad expr becomes absolute 0. */
4868 as_bad (_("missing or invalid displacement expression `%s' taken as 0"),
4870 exp->X_op = O_constant;
4871 exp->X_add_number = 0;
4872 exp->X_add_symbol = (symbolS *) 0;
4873 exp->X_op_symbol = (symbolS *) 0;
4876 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
4877 if (exp->X_op != O_constant
4878 && OUTPUT_FLAVOR == bfd_target_aout_flavour
4879 && exp_seg != absolute_section
4880 && exp_seg != text_section
4881 && exp_seg != data_section
4882 && exp_seg != bss_section
4883 && exp_seg != undefined_section
4884 && !bfd_is_com_section (exp_seg))
4886 as_bad (_("unimplemented segment %s in operand"), exp_seg->name);
4891 if (!(i.types[this_operand] & ~Disp))
4892 i.types[this_operand] &= types;
4897 /* Make sure the memory operand we've been dealt is valid.
4898 Return 1 on success, 0 on a failure. */
4901 i386_index_check (const char *operand_string)
4904 #if INFER_ADDR_PREFIX
4910 if ((current_templates->start->cpu_flags & CpuSVME)
4911 && current_templates->end[-1].operand_types[0] == AnyMem)
4913 /* Memory operands of SVME insns are special in that they only allow
4914 rAX as their memory address and ignore any segment override. */
4917 /* SKINIT is even more restrictive: it always requires EAX. */
4918 if (strcmp (current_templates->start->name, "skinit") == 0)
4920 else if (flag_code == CODE_64BIT)
4921 RegXX = i.prefix[ADDR_PREFIX] == 0 ? Reg64 : Reg32;
4923 RegXX = ((flag_code == CODE_16BIT) ^ (i.prefix[ADDR_PREFIX] != 0)
4927 || !(i.base_reg->reg_type & Acc)
4928 || !(i.base_reg->reg_type & RegXX)
4930 || (i.types[0] & Disp))
4933 else if (flag_code == CODE_64BIT)
4935 unsigned RegXX = (i.prefix[ADDR_PREFIX] == 0 ? Reg64 : Reg32);
4938 && ((i.base_reg->reg_type & RegXX) == 0)
4939 && (i.base_reg->reg_type != BaseIndex
4942 && ((i.index_reg->reg_type & (RegXX | BaseIndex))
4943 != (RegXX | BaseIndex))))
4948 if ((flag_code == CODE_16BIT) ^ (i.prefix[ADDR_PREFIX] != 0))
4952 && ((i.base_reg->reg_type & (Reg16 | BaseIndex | RegRex))
4953 != (Reg16 | BaseIndex)))
4955 && (((i.index_reg->reg_type & (Reg16 | BaseIndex))
4956 != (Reg16 | BaseIndex))
4958 && i.base_reg->reg_num < 6
4959 && i.index_reg->reg_num >= 6
4960 && i.log2_scale_factor == 0))))
4967 && (i.base_reg->reg_type & (Reg32 | RegRex)) != Reg32)
4969 && ((i.index_reg->reg_type & (Reg32 | BaseIndex | RegRex))
4970 != (Reg32 | BaseIndex))))
4976 #if INFER_ADDR_PREFIX
4977 if (i.prefix[ADDR_PREFIX] == 0)
4979 i.prefix[ADDR_PREFIX] = ADDR_PREFIX_OPCODE;
4981 /* Change the size of any displacement too. At most one of
4982 Disp16 or Disp32 is set.
4983 FIXME. There doesn't seem to be any real need for separate
4984 Disp16 and Disp32 flags. The same goes for Imm16 and Imm32.
4985 Removing them would probably clean up the code quite a lot. */
4986 if (flag_code != CODE_64BIT
4987 && (i.types[this_operand] & (Disp16 | Disp32)))
4988 i.types[this_operand] ^= (Disp16 | Disp32);
4993 as_bad (_("`%s' is not a valid base/index expression"),
4997 as_bad (_("`%s' is not a valid %s bit base/index expression"),
4999 flag_code_names[flag_code]);
5004 /* Parse OPERAND_STRING into the i386_insn structure I. Returns non-zero
5008 i386_operand (char *operand_string)
5012 char *op_string = operand_string;
5014 if (is_space_char (*op_string))
5017 /* We check for an absolute prefix (differentiating,
5018 for example, 'jmp pc_relative_label' from 'jmp *absolute_label'. */
5019 if (*op_string == ABSOLUTE_PREFIX)
5022 if (is_space_char (*op_string))
5024 i.types[this_operand] |= JumpAbsolute;
5027 /* Check if operand is a register. */
5028 if ((r = parse_register (op_string, &end_op)) != NULL)
5030 /* Check for a segment override by searching for ':' after a
5031 segment register. */
5033 if (is_space_char (*op_string))
5035 if (*op_string == ':' && (r->reg_type & (SReg2 | SReg3)))
5040 i.seg[i.mem_operands] = &es;
5043 i.seg[i.mem_operands] = &cs;
5046 i.seg[i.mem_operands] = &ss;
5049 i.seg[i.mem_operands] = &ds;
5052 i.seg[i.mem_operands] = &fs;
5055 i.seg[i.mem_operands] = &gs;
5059 /* Skip the ':' and whitespace. */
5061 if (is_space_char (*op_string))
5064 if (!is_digit_char (*op_string)
5065 && !is_identifier_char (*op_string)
5066 && *op_string != '('
5067 && *op_string != ABSOLUTE_PREFIX)
5069 as_bad (_("bad memory operand `%s'"), op_string);
5072 /* Handle case of %es:*foo. */
5073 if (*op_string == ABSOLUTE_PREFIX)
5076 if (is_space_char (*op_string))
5078 i.types[this_operand] |= JumpAbsolute;
5080 goto do_memory_reference;
5084 as_bad (_("junk `%s' after register"), op_string);
5087 i.types[this_operand] |= r->reg_type & ~BaseIndex;
5088 i.op[this_operand].regs = r;
5091 else if (*op_string == REGISTER_PREFIX)
5093 as_bad (_("bad register name `%s'"), op_string);
5096 else if (*op_string == IMMEDIATE_PREFIX)
5099 if (i.types[this_operand] & JumpAbsolute)
5101 as_bad (_("immediate operand illegal with absolute jump"));
5104 if (!i386_immediate (op_string))
5107 else if (is_digit_char (*op_string)
5108 || is_identifier_char (*op_string)
5109 || *op_string == '(')
5111 /* This is a memory reference of some sort. */
5114 /* Start and end of displacement string expression (if found). */
5115 char *displacement_string_start;
5116 char *displacement_string_end;
5118 do_memory_reference:
5119 if ((i.mem_operands == 1
5120 && (current_templates->start->opcode_modifier & IsString) == 0)
5121 || i.mem_operands == 2)
5123 as_bad (_("too many memory references for `%s'"),
5124 current_templates->start->name);
5128 /* Check for base index form. We detect the base index form by
5129 looking for an ')' at the end of the operand, searching
5130 for the '(' matching it, and finding a REGISTER_PREFIX or ','
5132 base_string = op_string + strlen (op_string);
5135 if (is_space_char (*base_string))
5138 /* If we only have a displacement, set-up for it to be parsed later. */
5139 displacement_string_start = op_string;
5140 displacement_string_end = base_string + 1;
5142 if (*base_string == ')')
5145 unsigned int parens_balanced = 1;
5146 /* We've already checked that the number of left & right ()'s are
5147 equal, so this loop will not be infinite. */
5151 if (*base_string == ')')
5153 if (*base_string == '(')
5156 while (parens_balanced);
5158 temp_string = base_string;
5160 /* Skip past '(' and whitespace. */
5162 if (is_space_char (*base_string))
5165 if (*base_string == ','
5166 || ((i.base_reg = parse_register (base_string, &end_op))
5169 displacement_string_end = temp_string;
5171 i.types[this_operand] |= BaseIndex;
5175 base_string = end_op;
5176 if (is_space_char (*base_string))
5180 /* There may be an index reg or scale factor here. */
5181 if (*base_string == ',')
5184 if (is_space_char (*base_string))
5187 if ((i.index_reg = parse_register (base_string, &end_op))
5190 base_string = end_op;
5191 if (is_space_char (*base_string))
5193 if (*base_string == ',')
5196 if (is_space_char (*base_string))
5199 else if (*base_string != ')')
5201 as_bad (_("expecting `,' or `)' "
5202 "after index register in `%s'"),
5207 else if (*base_string == REGISTER_PREFIX)
5209 as_bad (_("bad register name `%s'"), base_string);
5213 /* Check for scale factor. */
5214 if (*base_string != ')')
5216 char *end_scale = i386_scale (base_string);
5221 base_string = end_scale;
5222 if (is_space_char (*base_string))
5224 if (*base_string != ')')
5226 as_bad (_("expecting `)' "
5227 "after scale factor in `%s'"),
5232 else if (!i.index_reg)
5234 as_bad (_("expecting index register or scale factor "
5235 "after `,'; got '%c'"),
5240 else if (*base_string != ')')
5242 as_bad (_("expecting `,' or `)' "
5243 "after base register in `%s'"),
5248 else if (*base_string == REGISTER_PREFIX)
5250 as_bad (_("bad register name `%s'"), base_string);
5255 /* If there's an expression beginning the operand, parse it,
5256 assuming displacement_string_start and
5257 displacement_string_end are meaningful. */
5258 if (displacement_string_start != displacement_string_end)
5260 if (!i386_displacement (displacement_string_start,
5261 displacement_string_end))
5265 /* Special case for (%dx) while doing input/output op. */
5267 && i.base_reg->reg_type == (Reg16 | InOutPortReg)
5269 && i.log2_scale_factor == 0
5270 && i.seg[i.mem_operands] == 0
5271 && (i.types[this_operand] & Disp) == 0)
5273 i.types[this_operand] = InOutPortReg;
5277 if (i386_index_check (operand_string) == 0)
5283 /* It's not a memory operand; argh! */
5284 as_bad (_("invalid char %s beginning operand %d `%s'"),
5285 output_invalid (*op_string),
5290 return 1; /* Normal return. */
5293 /* md_estimate_size_before_relax()
5295 Called just before relax() for rs_machine_dependent frags. The x86
5296 assembler uses these frags to handle variable size jump
5299 Any symbol that is now undefined will not become defined.
5300 Return the correct fr_subtype in the frag.
5301 Return the initial "guess for variable size of frag" to caller.
5302 The guess is actually the growth beyond the fixed part. Whatever
5303 we do to grow the fixed or variable part contributes to our
5307 md_estimate_size_before_relax (fragP, segment)
5311 /* We've already got fragP->fr_subtype right; all we have to do is
5312 check for un-relaxable symbols. On an ELF system, we can't relax
5313 an externally visible symbol, because it may be overridden by a
5315 if (S_GET_SEGMENT (fragP->fr_symbol) != segment
5316 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5318 && (S_IS_EXTERNAL (fragP->fr_symbol)
5319 || S_IS_WEAK (fragP->fr_symbol)))
5323 /* Symbol is undefined in this segment, or we need to keep a
5324 reloc so that weak symbols can be overridden. */
5325 int size = (fragP->fr_subtype & CODE16) ? 2 : 4;
5326 enum bfd_reloc_code_real reloc_type;
5327 unsigned char *opcode;
5330 if (fragP->fr_var != NO_RELOC)
5331 reloc_type = fragP->fr_var;
5333 reloc_type = BFD_RELOC_16_PCREL;
5335 reloc_type = BFD_RELOC_32_PCREL;
5337 old_fr_fix = fragP->fr_fix;
5338 opcode = (unsigned char *) fragP->fr_opcode;
5340 switch (TYPE_FROM_RELAX_STATE (fragP->fr_subtype))
5343 /* Make jmp (0xeb) a (d)word displacement jump. */
5345 fragP->fr_fix += size;
5346 fix_new (fragP, old_fr_fix, size,
5348 fragP->fr_offset, 1,
5354 && (!no_cond_jump_promotion || fragP->fr_var != NO_RELOC))
5356 /* Negate the condition, and branch past an
5357 unconditional jump. */
5360 /* Insert an unconditional jump. */
5362 /* We added two extra opcode bytes, and have a two byte
5364 fragP->fr_fix += 2 + 2;
5365 fix_new (fragP, old_fr_fix + 2, 2,
5367 fragP->fr_offset, 1,
5374 if (no_cond_jump_promotion && fragP->fr_var == NO_RELOC)
5379 fixP = fix_new (fragP, old_fr_fix, 1,
5381 fragP->fr_offset, 1,
5383 fixP->fx_signed = 1;
5387 /* This changes the byte-displacement jump 0x7N
5388 to the (d)word-displacement jump 0x0f,0x8N. */
5389 opcode[1] = opcode[0] + 0x10;
5390 opcode[0] = TWO_BYTE_OPCODE_ESCAPE;
5391 /* We've added an opcode byte. */
5392 fragP->fr_fix += 1 + size;
5393 fix_new (fragP, old_fr_fix + 1, size,
5395 fragP->fr_offset, 1,
5400 BAD_CASE (fragP->fr_subtype);
5404 return fragP->fr_fix - old_fr_fix;
5407 /* Guess size depending on current relax state. Initially the relax
5408 state will correspond to a short jump and we return 1, because
5409 the variable part of the frag (the branch offset) is one byte
5410 long. However, we can relax a section more than once and in that
5411 case we must either set fr_subtype back to the unrelaxed state,
5412 or return the value for the appropriate branch. */
5413 return md_relax_table[fragP->fr_subtype].rlx_length;
5416 /* Called after relax() is finished.
5418 In: Address of frag.
5419 fr_type == rs_machine_dependent.
5420 fr_subtype is what the address relaxed to.
5422 Out: Any fixSs and constants are set up.
5423 Caller will turn frag into a ".space 0". */
5426 md_convert_frag (abfd, sec, fragP)
5427 bfd *abfd ATTRIBUTE_UNUSED;
5428 segT sec ATTRIBUTE_UNUSED;
5431 unsigned char *opcode;
5432 unsigned char *where_to_put_displacement = NULL;
5433 offsetT target_address;
5434 offsetT opcode_address;
5435 unsigned int extension = 0;
5436 offsetT displacement_from_opcode_start;
5438 opcode = (unsigned char *) fragP->fr_opcode;
5440 /* Address we want to reach in file space. */
5441 target_address = S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset;
5443 /* Address opcode resides at in file space. */
5444 opcode_address = fragP->fr_address + fragP->fr_fix;
5446 /* Displacement from opcode start to fill into instruction. */
5447 displacement_from_opcode_start = target_address - opcode_address;
5449 if ((fragP->fr_subtype & BIG) == 0)
5451 /* Don't have to change opcode. */
5452 extension = 1; /* 1 opcode + 1 displacement */
5453 where_to_put_displacement = &opcode[1];
5457 if (no_cond_jump_promotion
5458 && TYPE_FROM_RELAX_STATE (fragP->fr_subtype) != UNCOND_JUMP)
5459 as_warn_where (fragP->fr_file, fragP->fr_line,
5460 _("long jump required"));
5462 switch (fragP->fr_subtype)
5464 case ENCODE_RELAX_STATE (UNCOND_JUMP, BIG):
5465 extension = 4; /* 1 opcode + 4 displacement */
5467 where_to_put_displacement = &opcode[1];
5470 case ENCODE_RELAX_STATE (UNCOND_JUMP, BIG16):
5471 extension = 2; /* 1 opcode + 2 displacement */
5473 where_to_put_displacement = &opcode[1];
5476 case ENCODE_RELAX_STATE (COND_JUMP, BIG):
5477 case ENCODE_RELAX_STATE (COND_JUMP86, BIG):
5478 extension = 5; /* 2 opcode + 4 displacement */
5479 opcode[1] = opcode[0] + 0x10;
5480 opcode[0] = TWO_BYTE_OPCODE_ESCAPE;
5481 where_to_put_displacement = &opcode[2];
5484 case ENCODE_RELAX_STATE (COND_JUMP, BIG16):
5485 extension = 3; /* 2 opcode + 2 displacement */
5486 opcode[1] = opcode[0] + 0x10;
5487 opcode[0] = TWO_BYTE_OPCODE_ESCAPE;
5488 where_to_put_displacement = &opcode[2];
5491 case ENCODE_RELAX_STATE (COND_JUMP86, BIG16):
5496 where_to_put_displacement = &opcode[3];
5500 BAD_CASE (fragP->fr_subtype);
5505 /* If size if less then four we are sure that the operand fits,
5506 but if it's 4, then it could be that the displacement is larger
5508 if (DISP_SIZE_FROM_RELAX_STATE (fragP->fr_subtype) == 4
5510 && ((addressT) (displacement_from_opcode_start - extension
5511 + ((addressT) 1 << 31))
5512 > (((addressT) 2 << 31) - 1)))
5514 as_bad_where (fragP->fr_file, fragP->fr_line,
5515 _("jump target out of range"));
5516 /* Make us emit 0. */
5517 displacement_from_opcode_start = extension;
5519 /* Now put displacement after opcode. */
5520 md_number_to_chars ((char *) where_to_put_displacement,
5521 (valueT) (displacement_from_opcode_start - extension),
5522 DISP_SIZE_FROM_RELAX_STATE (fragP->fr_subtype));
5523 fragP->fr_fix += extension;
5526 /* Size of byte displacement jmp. */
5527 int md_short_jump_size = 2;
5529 /* Size of dword displacement jmp. */
5530 int md_long_jump_size = 5;
5533 md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
5535 addressT from_addr, to_addr;
5536 fragS *frag ATTRIBUTE_UNUSED;
5537 symbolS *to_symbol ATTRIBUTE_UNUSED;
5541 offset = to_addr - (from_addr + 2);
5542 /* Opcode for byte-disp jump. */
5543 md_number_to_chars (ptr, (valueT) 0xeb, 1);
5544 md_number_to_chars (ptr + 1, (valueT) offset, 1);
5548 md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
5550 addressT from_addr, to_addr;
5551 fragS *frag ATTRIBUTE_UNUSED;
5552 symbolS *to_symbol ATTRIBUTE_UNUSED;
5556 offset = to_addr - (from_addr + 5);
5557 md_number_to_chars (ptr, (valueT) 0xe9, 1);
5558 md_number_to_chars (ptr + 1, (valueT) offset, 4);
5561 /* Apply a fixup (fixS) to segment data, once it has been determined
5562 by our caller that we have all the info we need to fix it up.
5564 On the 386, immediates, displacements, and data pointers are all in
5565 the same (little-endian) format, so we don't need to care about which
5569 md_apply_fix (fixP, valP, seg)
5570 /* The fix we're to put in. */
5572 /* Pointer to the value of the bits. */
5574 /* Segment fix is from. */
5575 segT seg ATTRIBUTE_UNUSED;
5577 char *p = fixP->fx_where + fixP->fx_frag->fr_literal;
5578 valueT value = *valP;
5580 #if !defined (TE_Mach)
5583 switch (fixP->fx_r_type)
5589 fixP->fx_r_type = BFD_RELOC_64_PCREL;
5592 case BFD_RELOC_X86_64_32S:
5593 fixP->fx_r_type = BFD_RELOC_32_PCREL;
5596 fixP->fx_r_type = BFD_RELOC_16_PCREL;
5599 fixP->fx_r_type = BFD_RELOC_8_PCREL;
5604 if (fixP->fx_addsy != NULL
5605 && (fixP->fx_r_type == BFD_RELOC_32_PCREL
5606 || fixP->fx_r_type == BFD_RELOC_64_PCREL
5607 || fixP->fx_r_type == BFD_RELOC_16_PCREL
5608 || fixP->fx_r_type == BFD_RELOC_8_PCREL)
5609 && !use_rela_relocations)
5611 /* This is a hack. There should be a better way to handle this.
5612 This covers for the fact that bfd_install_relocation will
5613 subtract the current location (for partial_inplace, PC relative
5614 relocations); see more below. */
5618 || OUTPUT_FLAVOR == bfd_target_coff_flavour
5621 value += fixP->fx_where + fixP->fx_frag->fr_address;
5623 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5626 segT sym_seg = S_GET_SEGMENT (fixP->fx_addsy);
5629 || (symbol_section_p (fixP->fx_addsy)
5630 && sym_seg != absolute_section))
5631 && !generic_force_reloc (fixP))
5633 /* Yes, we add the values in twice. This is because
5634 bfd_install_relocation subtracts them out again. I think
5635 bfd_install_relocation is broken, but I don't dare change
5637 value += fixP->fx_where + fixP->fx_frag->fr_address;
5641 #if defined (OBJ_COFF) && defined (TE_PE)
5642 /* For some reason, the PE format does not store a
5643 section address offset for a PC relative symbol. */
5644 if (S_GET_SEGMENT (fixP->fx_addsy) != seg
5645 || S_IS_WEAK (fixP->fx_addsy))
5646 value += md_pcrel_from (fixP);
5650 /* Fix a few things - the dynamic linker expects certain values here,
5651 and we must not disappoint it. */
5652 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5653 if (IS_ELF && fixP->fx_addsy)
5654 switch (fixP->fx_r_type)
5656 case BFD_RELOC_386_PLT32:
5657 case BFD_RELOC_X86_64_PLT32:
5658 /* Make the jump instruction point to the address of the operand. At
5659 runtime we merely add the offset to the actual PLT entry. */
5663 case BFD_RELOC_386_TLS_GD:
5664 case BFD_RELOC_386_TLS_LDM:
5665 case BFD_RELOC_386_TLS_IE_32:
5666 case BFD_RELOC_386_TLS_IE:
5667 case BFD_RELOC_386_TLS_GOTIE:
5668 case BFD_RELOC_386_TLS_GOTDESC:
5669 case BFD_RELOC_X86_64_TLSGD:
5670 case BFD_RELOC_X86_64_TLSLD:
5671 case BFD_RELOC_X86_64_GOTTPOFF:
5672 case BFD_RELOC_X86_64_GOTPC32_TLSDESC:
5673 value = 0; /* Fully resolved at runtime. No addend. */
5675 case BFD_RELOC_386_TLS_LE:
5676 case BFD_RELOC_386_TLS_LDO_32:
5677 case BFD_RELOC_386_TLS_LE_32:
5678 case BFD_RELOC_X86_64_DTPOFF32:
5679 case BFD_RELOC_X86_64_DTPOFF64:
5680 case BFD_RELOC_X86_64_TPOFF32:
5681 case BFD_RELOC_X86_64_TPOFF64:
5682 S_SET_THREAD_LOCAL (fixP->fx_addsy);
5685 case BFD_RELOC_386_TLS_DESC_CALL:
5686 case BFD_RELOC_X86_64_TLSDESC_CALL:
5687 value = 0; /* Fully resolved at runtime. No addend. */
5688 S_SET_THREAD_LOCAL (fixP->fx_addsy);
5692 case BFD_RELOC_386_GOT32:
5693 case BFD_RELOC_X86_64_GOT32:
5694 value = 0; /* Fully resolved at runtime. No addend. */
5697 case BFD_RELOC_VTABLE_INHERIT:
5698 case BFD_RELOC_VTABLE_ENTRY:
5705 #endif /* defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) */
5707 #endif /* !defined (TE_Mach) */
5709 /* Are we finished with this relocation now? */
5710 if (fixP->fx_addsy == NULL)
5712 else if (use_rela_relocations)
5714 fixP->fx_no_overflow = 1;
5715 /* Remember value for tc_gen_reloc. */
5716 fixP->fx_addnumber = value;
5720 md_number_to_chars (p, value, fixP->fx_size);
5723 #define MAX_LITTLENUMS 6
5725 /* Turn the string pointed to by litP into a floating point constant
5726 of type TYPE, and emit the appropriate bytes. The number of
5727 LITTLENUMS emitted is stored in *SIZEP. An error message is
5728 returned, or NULL on OK. */
5731 md_atof (type, litP, sizeP)
5737 LITTLENUM_TYPE words[MAX_LITTLENUMS];
5738 LITTLENUM_TYPE *wordP;
5760 return _("Bad call to md_atof ()");
5762 t = atof_ieee (input_line_pointer, type, words);
5764 input_line_pointer = t;
5766 *sizeP = prec * sizeof (LITTLENUM_TYPE);
5767 /* This loops outputs the LITTLENUMs in REVERSE order; in accord with
5768 the bigendian 386. */
5769 for (wordP = words + prec - 1; prec--;)
5771 md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
5772 litP += sizeof (LITTLENUM_TYPE);
5777 static char output_invalid_buf[sizeof (unsigned char) * 2 + 6];
5780 output_invalid (int c)
5783 snprintf (output_invalid_buf, sizeof (output_invalid_buf),
5786 snprintf (output_invalid_buf, sizeof (output_invalid_buf),
5787 "(0x%x)", (unsigned char) c);
5788 return output_invalid_buf;
5791 /* REG_STRING starts *before* REGISTER_PREFIX. */
5793 static const reg_entry *
5794 parse_real_register (char *reg_string, char **end_op)
5796 char *s = reg_string;
5798 char reg_name_given[MAX_REG_NAME_SIZE + 1];
5801 /* Skip possible REGISTER_PREFIX and possible whitespace. */
5802 if (*s == REGISTER_PREFIX)
5805 if (is_space_char (*s))
5809 while ((*p++ = register_chars[(unsigned char) *s]) != '\0')
5811 if (p >= reg_name_given + MAX_REG_NAME_SIZE)
5812 return (const reg_entry *) NULL;
5816 /* For naked regs, make sure that we are not dealing with an identifier.
5817 This prevents confusing an identifier like `eax_var' with register
5819 if (allow_naked_reg && identifier_chars[(unsigned char) *s])
5820 return (const reg_entry *) NULL;
5824 r = (const reg_entry *) hash_find (reg_hash, reg_name_given);
5826 /* Handle floating point regs, allowing spaces in the (i) part. */
5827 if (r == i386_regtab /* %st is first entry of table */)
5829 if (is_space_char (*s))
5834 if (is_space_char (*s))
5836 if (*s >= '0' && *s <= '7')
5840 if (is_space_char (*s))
5845 r = hash_find (reg_hash, "st(0)");
5850 /* We have "%st(" then garbage. */
5851 return (const reg_entry *) NULL;
5856 && ((r->reg_flags & (RegRex64 | RegRex)) | (r->reg_type & Reg64)) != 0
5857 && (r->reg_type != Control || !(cpu_arch_flags & CpuSledgehammer))
5858 && flag_code != CODE_64BIT)
5859 return (const reg_entry *) NULL;
5864 /* REG_STRING starts *before* REGISTER_PREFIX. */
5866 static const reg_entry *
5867 parse_register (char *reg_string, char **end_op)
5871 if (*reg_string == REGISTER_PREFIX || allow_naked_reg)
5872 r = parse_real_register (reg_string, end_op);
5877 char *save = input_line_pointer;
5881 input_line_pointer = reg_string;
5882 c = get_symbol_end ();
5883 symbolP = symbol_find (reg_string);
5884 if (symbolP && S_GET_SEGMENT (symbolP) == reg_section)
5886 const expressionS *e = symbol_get_value_expression (symbolP);
5888 know (e->X_op == O_register);
5889 know (e->X_add_number >= 0
5890 && (valueT) e->X_add_number < i386_regtab_size);
5891 r = i386_regtab + e->X_add_number;
5892 *end_op = input_line_pointer;
5894 *input_line_pointer = c;
5895 input_line_pointer = save;
5901 i386_parse_name (char *name, expressionS *e, char *nextcharP)
5904 char *end = input_line_pointer;
5907 r = parse_register (name, &input_line_pointer);
5908 if (r && end <= input_line_pointer)
5910 *nextcharP = *input_line_pointer;
5911 *input_line_pointer = 0;
5912 e->X_op = O_register;
5913 e->X_add_number = r - i386_regtab;
5916 input_line_pointer = end;
5922 md_operand (expressionS *e)
5924 if (*input_line_pointer == REGISTER_PREFIX)
5927 const reg_entry *r = parse_real_register (input_line_pointer, &end);
5931 e->X_op = O_register;
5932 e->X_add_number = r - i386_regtab;
5933 input_line_pointer = end;
5939 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5940 const char *md_shortopts = "kVQ:sqn";
5942 const char *md_shortopts = "qn";
5945 #define OPTION_32 (OPTION_MD_BASE + 0)
5946 #define OPTION_64 (OPTION_MD_BASE + 1)
5947 #define OPTION_DIVIDE (OPTION_MD_BASE + 2)
5948 #define OPTION_MARCH (OPTION_MD_BASE + 3)
5949 #define OPTION_MTUNE (OPTION_MD_BASE + 4)
5951 struct option md_longopts[] =
5953 {"32", no_argument, NULL, OPTION_32},
5954 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) || defined(TE_PEP)
5955 {"64", no_argument, NULL, OPTION_64},
5957 {"divide", no_argument, NULL, OPTION_DIVIDE},
5958 {"march", required_argument, NULL, OPTION_MARCH},
5959 {"mtune", required_argument, NULL, OPTION_MTUNE},
5960 {NULL, no_argument, NULL, 0}
5962 size_t md_longopts_size = sizeof (md_longopts);
5965 md_parse_option (int c, char *arg)
5972 optimize_align_code = 0;
5979 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5980 /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section
5981 should be emitted or not. FIXME: Not implemented. */
5985 /* -V: SVR4 argument to print version ID. */
5987 print_version_id ();
5990 /* -k: Ignore for FreeBSD compatibility. */
5995 /* -s: On i386 Solaris, this tells the native assembler to use
5996 .stab instead of .stab.excl. We always use .stab anyhow. */
5999 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) || defined(TE_PEP)
6002 const char **list, **l;
6004 list = bfd_target_list ();
6005 for (l = list; *l != NULL; l++)
6006 if (CONST_STRNEQ (*l, "elf64-x86-64")
6007 || strcmp (*l, "coff-x86-64") == 0
6008 || strcmp (*l, "pe-x86-64") == 0
6009 || strcmp (*l, "pei-x86-64") == 0)
6011 default_arch = "x86_64";
6015 as_fatal (_("No compiled in support for x86_64"));
6022 default_arch = "i386";
6026 #ifdef SVR4_COMMENT_CHARS
6031 n = (char *) xmalloc (strlen (i386_comment_chars) + 1);
6033 for (s = i386_comment_chars; *s != '\0'; s++)
6037 i386_comment_chars = n;
6044 as_fatal (_("Invalid -march= option: `%s'"), arg);
6045 for (i = 0; i < ARRAY_SIZE (cpu_arch); i++)
6047 if (strcmp (arg, cpu_arch [i].name) == 0)
6049 cpu_arch_isa = cpu_arch[i].type;
6050 cpu_arch_isa_flags = cpu_arch[i].flags;
6051 if (!cpu_arch_tune_set)
6053 cpu_arch_tune = cpu_arch_isa;
6054 cpu_arch_tune_flags = cpu_arch_isa_flags;
6059 if (i >= ARRAY_SIZE (cpu_arch))
6060 as_fatal (_("Invalid -march= option: `%s'"), arg);
6065 as_fatal (_("Invalid -mtune= option: `%s'"), arg);
6066 for (i = 0; i < ARRAY_SIZE (cpu_arch); i++)
6068 if (strcmp (arg, cpu_arch [i].name) == 0)
6070 cpu_arch_tune_set = 1;
6071 cpu_arch_tune = cpu_arch [i].type;
6072 cpu_arch_tune_flags = cpu_arch[i].flags;
6076 if (i >= ARRAY_SIZE (cpu_arch))
6077 as_fatal (_("Invalid -mtune= option: `%s'"), arg);
6087 md_show_usage (stream)
6090 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
6091 fprintf (stream, _("\
6093 -V print assembler version number\n\
6096 fprintf (stream, _("\
6097 -n Do not optimize code alignment\n\
6098 -q quieten some warnings\n"));
6099 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
6100 fprintf (stream, _("\
6103 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) || defined(TE_PEP)
6104 fprintf (stream, _("\
6105 --32/--64 generate 32bit/64bit code\n"));
6107 #ifdef SVR4_COMMENT_CHARS
6108 fprintf (stream, _("\
6109 --divide do not treat `/' as a comment character\n"));
6111 fprintf (stream, _("\
6112 --divide ignored\n"));
6114 fprintf (stream, _("\
6115 -march=CPU/-mtune=CPU generate code/optimize for CPU, where CPU is one of:\n\
6116 i386, i486, pentium, pentiumpro, pentium4, nocona,\n\
6117 core, core2, k6, athlon, k8, generic32, generic64\n"));
6123 x86_64_target_format (void)
6125 if (strcmp (default_arch, "x86_64") == 0)
6127 set_code_flag (CODE_64BIT);
6128 return COFF_TARGET_FORMAT;
6130 else if (strcmp (default_arch, "i386") == 0)
6132 set_code_flag (CODE_32BIT);
6136 as_fatal (_("Unknown architecture"));
6141 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
6142 || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF))
6144 /* Pick the target format to use. */
6147 i386_target_format (void)
6149 if (!strcmp (default_arch, "x86_64"))
6151 set_code_flag (CODE_64BIT);
6152 if (cpu_arch_isa_flags == 0)
6153 cpu_arch_isa_flags = Cpu186|Cpu286|Cpu386|Cpu486
6154 |Cpu586|Cpu686|CpuP4|CpuMMX|CpuMMX2
6156 if (cpu_arch_tune_flags == 0)
6157 cpu_arch_tune_flags = Cpu186|Cpu286|Cpu386|Cpu486
6158 |Cpu586|Cpu686|CpuP4|CpuMMX|CpuMMX2
6161 else if (!strcmp (default_arch, "i386"))
6163 set_code_flag (CODE_32BIT);
6164 if (cpu_arch_isa_flags == 0)
6165 cpu_arch_isa_flags = Cpu186|Cpu286|Cpu386;
6166 if (cpu_arch_tune_flags == 0)
6167 cpu_arch_tune_flags = Cpu186|Cpu286|Cpu386;
6170 as_fatal (_("Unknown architecture"));
6171 switch (OUTPUT_FLAVOR)
6173 #ifdef OBJ_MAYBE_AOUT
6174 case bfd_target_aout_flavour:
6175 return AOUT_TARGET_FORMAT;
6177 #ifdef OBJ_MAYBE_COFF
6178 case bfd_target_coff_flavour:
6181 #if defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF)
6182 case bfd_target_elf_flavour:
6184 if (flag_code == CODE_64BIT)
6187 use_rela_relocations = 1;
6189 return flag_code == CODE_64BIT ? ELF_TARGET_FORMAT64 : ELF_TARGET_FORMAT;
6198 #endif /* OBJ_MAYBE_ more than one */
6200 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF))
6202 i386_elf_emit_arch_note (void)
6204 if (IS_ELF && cpu_arch_name != NULL)
6207 asection *seg = now_seg;
6208 subsegT subseg = now_subseg;
6209 Elf_Internal_Note i_note;
6210 Elf_External_Note e_note;
6211 asection *note_secp;
6214 /* Create the .note section. */
6215 note_secp = subseg_new (".note", 0);
6216 bfd_set_section_flags (stdoutput,
6218 SEC_HAS_CONTENTS | SEC_READONLY);
6220 /* Process the arch string. */
6221 len = strlen (cpu_arch_name);
6223 i_note.namesz = len + 1;
6225 i_note.type = NT_ARCH;
6226 p = frag_more (sizeof (e_note.namesz));
6227 md_number_to_chars (p, (valueT) i_note.namesz, sizeof (e_note.namesz));
6228 p = frag_more (sizeof (e_note.descsz));
6229 md_number_to_chars (p, (valueT) i_note.descsz, sizeof (e_note.descsz));
6230 p = frag_more (sizeof (e_note.type));
6231 md_number_to_chars (p, (valueT) i_note.type, sizeof (e_note.type));
6232 p = frag_more (len + 1);
6233 strcpy (p, cpu_arch_name);
6235 frag_align (2, 0, 0);
6237 subseg_set (seg, subseg);
6243 md_undefined_symbol (name)
6246 if (name[0] == GLOBAL_OFFSET_TABLE_NAME[0]
6247 && name[1] == GLOBAL_OFFSET_TABLE_NAME[1]
6248 && name[2] == GLOBAL_OFFSET_TABLE_NAME[2]
6249 && strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0)
6253 if (symbol_find (name))
6254 as_bad (_("GOT already in symbol table"));
6255 GOT_symbol = symbol_new (name, undefined_section,
6256 (valueT) 0, &zero_address_frag);
6263 /* Round up a section size to the appropriate boundary. */
6266 md_section_align (segment, size)
6267 segT segment ATTRIBUTE_UNUSED;
6270 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
6271 if (OUTPUT_FLAVOR == bfd_target_aout_flavour)
6273 /* For a.out, force the section size to be aligned. If we don't do
6274 this, BFD will align it for us, but it will not write out the
6275 final bytes of the section. This may be a bug in BFD, but it is
6276 easier to fix it here since that is how the other a.out targets
6280 align = bfd_get_section_alignment (stdoutput, segment);
6281 size = ((size + (1 << align) - 1) & ((valueT) -1 << align));
6288 /* On the i386, PC-relative offsets are relative to the start of the
6289 next instruction. That is, the address of the offset, plus its
6290 size, since the offset is always the last part of the insn. */
6293 md_pcrel_from (fixS *fixP)
6295 return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
6301 s_bss (int ignore ATTRIBUTE_UNUSED)
6305 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
6307 obj_elf_section_change_hook ();
6309 temp = get_absolute_expression ();
6310 subseg_set (bss_section, (subsegT) temp);
6311 demand_empty_rest_of_line ();
6317 i386_validate_fix (fixS *fixp)
6319 if (fixp->fx_subsy && fixp->fx_subsy == GOT_symbol)
6321 if (fixp->fx_r_type == BFD_RELOC_32_PCREL)
6325 fixp->fx_r_type = BFD_RELOC_X86_64_GOTPCREL;
6330 fixp->fx_r_type = BFD_RELOC_386_GOTOFF;
6332 fixp->fx_r_type = BFD_RELOC_X86_64_GOTOFF64;
6339 tc_gen_reloc (section, fixp)
6340 asection *section ATTRIBUTE_UNUSED;
6344 bfd_reloc_code_real_type code;
6346 switch (fixp->fx_r_type)
6348 case BFD_RELOC_X86_64_PLT32:
6349 case BFD_RELOC_X86_64_GOT32:
6350 case BFD_RELOC_X86_64_GOTPCREL:
6351 case BFD_RELOC_386_PLT32:
6352 case BFD_RELOC_386_GOT32:
6353 case BFD_RELOC_386_GOTOFF:
6354 case BFD_RELOC_386_GOTPC:
6355 case BFD_RELOC_386_TLS_GD:
6356 case BFD_RELOC_386_TLS_LDM:
6357 case BFD_RELOC_386_TLS_LDO_32:
6358 case BFD_RELOC_386_TLS_IE_32:
6359 case BFD_RELOC_386_TLS_IE:
6360 case BFD_RELOC_386_TLS_GOTIE:
6361 case BFD_RELOC_386_TLS_LE_32:
6362 case BFD_RELOC_386_TLS_LE:
6363 case BFD_RELOC_386_TLS_GOTDESC:
6364 case BFD_RELOC_386_TLS_DESC_CALL:
6365 case BFD_RELOC_X86_64_TLSGD:
6366 case BFD_RELOC_X86_64_TLSLD:
6367 case BFD_RELOC_X86_64_DTPOFF32:
6368 case BFD_RELOC_X86_64_DTPOFF64:
6369 case BFD_RELOC_X86_64_GOTTPOFF:
6370 case BFD_RELOC_X86_64_TPOFF32:
6371 case BFD_RELOC_X86_64_TPOFF64:
6372 case BFD_RELOC_X86_64_GOTOFF64:
6373 case BFD_RELOC_X86_64_GOTPC32:
6374 case BFD_RELOC_X86_64_GOT64:
6375 case BFD_RELOC_X86_64_GOTPCREL64:
6376 case BFD_RELOC_X86_64_GOTPC64:
6377 case BFD_RELOC_X86_64_GOTPLT64:
6378 case BFD_RELOC_X86_64_PLTOFF64:
6379 case BFD_RELOC_X86_64_GOTPC32_TLSDESC:
6380 case BFD_RELOC_X86_64_TLSDESC_CALL:
6382 case BFD_RELOC_VTABLE_ENTRY:
6383 case BFD_RELOC_VTABLE_INHERIT:
6385 case BFD_RELOC_32_SECREL:
6387 code = fixp->fx_r_type;
6389 case BFD_RELOC_X86_64_32S:
6390 if (!fixp->fx_pcrel)
6392 /* Don't turn BFD_RELOC_X86_64_32S into BFD_RELOC_32. */
6393 code = fixp->fx_r_type;
6399 switch (fixp->fx_size)
6402 as_bad_where (fixp->fx_file, fixp->fx_line,
6403 _("can not do %d byte pc-relative relocation"),
6405 code = BFD_RELOC_32_PCREL;
6407 case 1: code = BFD_RELOC_8_PCREL; break;
6408 case 2: code = BFD_RELOC_16_PCREL; break;
6409 case 4: code = BFD_RELOC_32_PCREL; break;
6411 case 8: code = BFD_RELOC_64_PCREL; break;
6417 switch (fixp->fx_size)
6420 as_bad_where (fixp->fx_file, fixp->fx_line,
6421 _("can not do %d byte relocation"),
6423 code = BFD_RELOC_32;
6425 case 1: code = BFD_RELOC_8; break;
6426 case 2: code = BFD_RELOC_16; break;
6427 case 4: code = BFD_RELOC_32; break;
6429 case 8: code = BFD_RELOC_64; break;
6436 if ((code == BFD_RELOC_32
6437 || code == BFD_RELOC_32_PCREL
6438 || code == BFD_RELOC_X86_64_32S)
6440 && fixp->fx_addsy == GOT_symbol)
6443 code = BFD_RELOC_386_GOTPC;
6445 code = BFD_RELOC_X86_64_GOTPC32;
6447 if ((code == BFD_RELOC_64 || code == BFD_RELOC_64_PCREL)
6449 && fixp->fx_addsy == GOT_symbol)
6451 code = BFD_RELOC_X86_64_GOTPC64;
6454 rel = (arelent *) xmalloc (sizeof (arelent));
6455 rel->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
6456 *rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
6458 rel->address = fixp->fx_frag->fr_address + fixp->fx_where;
6460 if (!use_rela_relocations)
6462 /* HACK: Since i386 ELF uses Rel instead of Rela, encode the
6463 vtable entry to be used in the relocation's section offset. */
6464 if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
6465 rel->address = fixp->fx_offset;
6469 /* Use the rela in 64bit mode. */
6472 if (!fixp->fx_pcrel)
6473 rel->addend = fixp->fx_offset;
6477 case BFD_RELOC_X86_64_PLT32:
6478 case BFD_RELOC_X86_64_GOT32:
6479 case BFD_RELOC_X86_64_GOTPCREL:
6480 case BFD_RELOC_X86_64_TLSGD:
6481 case BFD_RELOC_X86_64_TLSLD:
6482 case BFD_RELOC_X86_64_GOTTPOFF:
6483 case BFD_RELOC_X86_64_GOTPC32_TLSDESC:
6484 case BFD_RELOC_X86_64_TLSDESC_CALL:
6485 rel->addend = fixp->fx_offset - fixp->fx_size;
6488 rel->addend = (section->vma
6490 + fixp->fx_addnumber
6491 + md_pcrel_from (fixp));
6496 rel->howto = bfd_reloc_type_lookup (stdoutput, code);
6497 if (rel->howto == NULL)
6499 as_bad_where (fixp->fx_file, fixp->fx_line,
6500 _("cannot represent relocation type %s"),
6501 bfd_get_reloc_code_name (code));
6502 /* Set howto to a garbage value so that we can keep going. */
6503 rel->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32);
6504 assert (rel->howto != NULL);
6511 /* Parse operands using Intel syntax. This implements a recursive descent
6512 parser based on the BNF grammar published in Appendix B of the MASM 6.1
6515 FIXME: We do not recognize the full operand grammar defined in the MASM
6516 documentation. In particular, all the structure/union and
6517 high-level macro operands are missing.
6519 Uppercase words are terminals, lower case words are non-terminals.
6520 Objects surrounded by double brackets '[[' ']]' are optional. Vertical
6521 bars '|' denote choices. Most grammar productions are implemented in
6522 functions called 'intel_<production>'.
6524 Initial production is 'expr'.
6530 binOp & | AND | \| | OR | ^ | XOR
6532 byteRegister AL | AH | BL | BH | CL | CH | DL | DH
6534 constant digits [[ radixOverride ]]
6536 dataType BYTE | WORD | DWORD | FWORD | QWORD | TBYTE | OWORD | XMMWORD
6574 => expr expr cmpOp e04
6577 gpRegister AX | EAX | BX | EBX | CX | ECX | DX | EDX
6578 | BP | EBP | SP | ESP | DI | EDI | SI | ESI
6580 hexdigit a | b | c | d | e | f
6581 | A | B | C | D | E | F
6587 mulOp * | / | % | MOD | << | SHL | >> | SHR
6591 register specialRegister
6595 segmentRegister CS | DS | ES | FS | GS | SS
6597 specialRegister CR0 | CR2 | CR3 | CR4
6598 | DR0 | DR1 | DR2 | DR3 | DR6 | DR7
6599 | TR3 | TR4 | TR5 | TR6 | TR7
6601 We simplify the grammar in obvious places (e.g., register parsing is
6602 done by calling parse_register) and eliminate immediate left recursion
6603 to implement a recursive-descent parser.
6607 expr' cmpOp e04 expr'
6658 /* Parsing structure for the intel syntax parser. Used to implement the
6659 semantic actions for the operand grammar. */
6660 struct intel_parser_s
6662 char *op_string; /* The string being parsed. */
6663 int got_a_float; /* Whether the operand is a float. */
6664 int op_modifier; /* Operand modifier. */
6665 int is_mem; /* 1 if operand is memory reference. */
6666 int in_offset; /* >=1 if parsing operand of offset. */
6667 int in_bracket; /* >=1 if parsing operand in brackets. */
6668 const reg_entry *reg; /* Last register reference found. */
6669 char *disp; /* Displacement string being built. */
6670 char *next_operand; /* Resume point when splitting operands. */
6673 static struct intel_parser_s intel_parser;
6675 /* Token structure for parsing intel syntax. */
6678 int code; /* Token code. */
6679 const reg_entry *reg; /* Register entry for register tokens. */
6680 char *str; /* String representation. */
6683 static struct intel_token cur_token, prev_token;
6685 /* Token codes for the intel parser. Since T_SHORT is already used
6686 by COFF, undefine it first to prevent a warning. */
6705 /* Prototypes for intel parser functions. */
6706 static int intel_match_token (int);
6707 static void intel_putback_token (void);
6708 static void intel_get_token (void);
6709 static int intel_expr (void);
6710 static int intel_e04 (void);
6711 static int intel_e05 (void);
6712 static int intel_e06 (void);
6713 static int intel_e09 (void);
6714 static int intel_e10 (void);
6715 static int intel_e11 (void);
6718 i386_intel_operand (char *operand_string, int got_a_float)
6723 p = intel_parser.op_string = xstrdup (operand_string);
6724 intel_parser.disp = (char *) xmalloc (strlen (operand_string) + 1);
6728 /* Initialize token holders. */
6729 cur_token.code = prev_token.code = T_NIL;
6730 cur_token.reg = prev_token.reg = NULL;
6731 cur_token.str = prev_token.str = NULL;
6733 /* Initialize parser structure. */
6734 intel_parser.got_a_float = got_a_float;
6735 intel_parser.op_modifier = 0;
6736 intel_parser.is_mem = 0;
6737 intel_parser.in_offset = 0;
6738 intel_parser.in_bracket = 0;
6739 intel_parser.reg = NULL;
6740 intel_parser.disp[0] = '\0';
6741 intel_parser.next_operand = NULL;
6743 /* Read the first token and start the parser. */
6745 ret = intel_expr ();
6750 if (cur_token.code != T_NIL)
6752 as_bad (_("invalid operand for '%s' ('%s' unexpected)"),
6753 current_templates->start->name, cur_token.str);
6756 /* If we found a memory reference, hand it over to i386_displacement
6757 to fill in the rest of the operand fields. */
6758 else if (intel_parser.is_mem)
6760 if ((i.mem_operands == 1
6761 && (current_templates->start->opcode_modifier & IsString) == 0)
6762 || i.mem_operands == 2)
6764 as_bad (_("too many memory references for '%s'"),
6765 current_templates->start->name);
6770 char *s = intel_parser.disp;
6773 if (!quiet_warnings && intel_parser.is_mem < 0)
6774 /* See the comments in intel_bracket_expr. */
6775 as_warn (_("Treating `%s' as memory reference"), operand_string);
6777 /* Add the displacement expression. */
6779 ret = i386_displacement (s, s + strlen (s));
6782 /* Swap base and index in 16-bit memory operands like
6783 [si+bx]. Since i386_index_check is also used in AT&T
6784 mode we have to do that here. */
6787 && (i.base_reg->reg_type & Reg16)
6788 && (i.index_reg->reg_type & Reg16)
6789 && i.base_reg->reg_num >= 6
6790 && i.index_reg->reg_num < 6)
6792 const reg_entry *base = i.index_reg;
6794 i.index_reg = i.base_reg;
6797 ret = i386_index_check (operand_string);
6802 /* Constant and OFFSET expressions are handled by i386_immediate. */
6803 else if ((intel_parser.op_modifier & (1 << T_OFFSET))
6804 || intel_parser.reg == NULL)
6805 ret = i386_immediate (intel_parser.disp);
6807 if (intel_parser.next_operand && this_operand >= MAX_OPERANDS - 1)
6809 if (!ret || !intel_parser.next_operand)
6811 intel_parser.op_string = intel_parser.next_operand;
6812 this_operand = i.operands++;
6816 free (intel_parser.disp);
6821 #define NUM_ADDRESS_REGS (!!i.base_reg + !!i.index_reg)
6825 expr' cmpOp e04 expr'
6830 /* XXX Implement the comparison operators. */
6831 return intel_e04 ();
6848 if (nregs >= 0 && NUM_ADDRESS_REGS > nregs)
6849 i.base_reg = i386_regtab + REGNAM_AL; /* al is invalid as base */
6851 if (cur_token.code == '+')
6853 else if (cur_token.code == '-')
6854 nregs = NUM_ADDRESS_REGS;
6858 strcat (intel_parser.disp, cur_token.str);
6859 intel_match_token (cur_token.code);
6870 int nregs = ~NUM_ADDRESS_REGS;
6877 if (cur_token.code == '&'
6878 || cur_token.code == '|'
6879 || cur_token.code == '^')
6883 str[0] = cur_token.code;
6885 strcat (intel_parser.disp, str);
6890 intel_match_token (cur_token.code);
6895 if (nregs >= 0 && NUM_ADDRESS_REGS > nregs)
6896 i.base_reg = i386_regtab + REGNAM_AL + 1; /* cl is invalid as base */
6907 int nregs = ~NUM_ADDRESS_REGS;
6914 if (cur_token.code == '*'
6915 || cur_token.code == '/'
6916 || cur_token.code == '%')
6920 str[0] = cur_token.code;
6922 strcat (intel_parser.disp, str);
6924 else if (cur_token.code == T_SHL)
6925 strcat (intel_parser.disp, "<<");
6926 else if (cur_token.code == T_SHR)
6927 strcat (intel_parser.disp, ">>");
6931 intel_match_token (cur_token.code);
6936 if (nregs >= 0 && NUM_ADDRESS_REGS > nregs)
6937 i.base_reg = i386_regtab + REGNAM_AL + 2; /* dl is invalid as base */
6955 int nregs = ~NUM_ADDRESS_REGS;
6960 /* Don't consume constants here. */
6961 if (cur_token.code == '+' || cur_token.code == '-')
6963 /* Need to look one token ahead - if the next token
6964 is a constant, the current token is its sign. */
6967 intel_match_token (cur_token.code);
6968 next_code = cur_token.code;
6969 intel_putback_token ();
6970 if (next_code == T_CONST)
6974 /* e09 OFFSET e09 */
6975 if (cur_token.code == T_OFFSET)
6978 ++intel_parser.in_offset;
6982 else if (cur_token.code == T_SHORT)
6983 intel_parser.op_modifier |= 1 << T_SHORT;
6986 else if (cur_token.code == '+')
6987 strcat (intel_parser.disp, "+");
6992 else if (cur_token.code == '-' || cur_token.code == '~')
6998 str[0] = cur_token.code;
7000 strcat (intel_parser.disp, str);
7007 intel_match_token (cur_token.code);
7015 /* e09' PTR e10 e09' */
7016 if (cur_token.code == T_PTR)
7020 if (prev_token.code == T_BYTE)
7021 suffix = BYTE_MNEM_SUFFIX;
7023 else if (prev_token.code == T_WORD)
7025 if (current_templates->start->name[0] == 'l'
7026 && current_templates->start->name[2] == 's'
7027 && current_templates->start->name[3] == 0)
7028 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
7029 else if (intel_parser.got_a_float == 2) /* "fi..." */
7030 suffix = SHORT_MNEM_SUFFIX;
7032 suffix = WORD_MNEM_SUFFIX;
7035 else if (prev_token.code == T_DWORD)
7037 if (current_templates->start->name[0] == 'l'
7038 && current_templates->start->name[2] == 's'
7039 && current_templates->start->name[3] == 0)
7040 suffix = WORD_MNEM_SUFFIX;
7041 else if (flag_code == CODE_16BIT
7042 && (current_templates->start->opcode_modifier
7043 & (Jump | JumpDword)))
7044 suffix = LONG_DOUBLE_MNEM_SUFFIX;
7045 else if (intel_parser.got_a_float == 1) /* "f..." */
7046 suffix = SHORT_MNEM_SUFFIX;
7048 suffix = LONG_MNEM_SUFFIX;
7051 else if (prev_token.code == T_FWORD)
7053 if (current_templates->start->name[0] == 'l'
7054 && current_templates->start->name[2] == 's'
7055 && current_templates->start->name[3] == 0)
7056 suffix = LONG_MNEM_SUFFIX;
7057 else if (!intel_parser.got_a_float)
7059 if (flag_code == CODE_16BIT)
7060 add_prefix (DATA_PREFIX_OPCODE);
7061 suffix = LONG_DOUBLE_MNEM_SUFFIX;
7064 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
7067 else if (prev_token.code == T_QWORD)
7069 if (intel_parser.got_a_float == 1) /* "f..." */
7070 suffix = LONG_MNEM_SUFFIX;
7072 suffix = QWORD_MNEM_SUFFIX;
7075 else if (prev_token.code == T_TBYTE)
7077 if (intel_parser.got_a_float == 1)
7078 suffix = LONG_DOUBLE_MNEM_SUFFIX;
7080 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
7083 else if (prev_token.code == T_XMMWORD)
7085 /* XXX ignored for now, but accepted since gcc uses it */
7091 as_bad (_("Unknown operand modifier `%s'"), prev_token.str);
7095 /* Operands for jump/call using 'ptr' notation denote absolute
7097 if (current_templates->start->opcode_modifier & (Jump | JumpDword))
7098 i.types[this_operand] |= JumpAbsolute;
7100 if (current_templates->start->base_opcode == 0x8d /* lea */)
7104 else if (i.suffix != suffix)
7106 as_bad (_("Conflicting operand modifiers"));
7112 /* e09' : e10 e09' */
7113 else if (cur_token.code == ':')
7115 if (prev_token.code != T_REG)
7117 /* While {call,jmp} SSSS:OOOO is MASM syntax only when SSSS is a
7118 segment/group identifier (which we don't have), using comma
7119 as the operand separator there is even less consistent, since
7120 there all branches only have a single operand. */
7121 if (this_operand != 0
7122 || intel_parser.in_offset
7123 || intel_parser.in_bracket
7124 || (!(current_templates->start->opcode_modifier
7125 & (Jump|JumpDword|JumpInterSegment))
7126 && !(current_templates->start->operand_types[0]
7128 return intel_match_token (T_NIL);
7129 /* Remember the start of the 2nd operand and terminate 1st
7131 XXX This isn't right, yet (when SSSS:OOOO is right operand of
7132 another expression), but it gets at least the simplest case
7133 (a plain number or symbol on the left side) right. */
7134 intel_parser.next_operand = intel_parser.op_string;
7135 *--intel_parser.op_string = '\0';
7136 return intel_match_token (':');
7144 intel_match_token (cur_token.code);
7150 --intel_parser.in_offset;
7153 if (NUM_ADDRESS_REGS > nregs)
7155 as_bad (_("Invalid operand to `OFFSET'"));
7158 intel_parser.op_modifier |= 1 << T_OFFSET;
7161 if (nregs >= 0 && NUM_ADDRESS_REGS > nregs)
7162 i.base_reg = i386_regtab + REGNAM_AL + 3; /* bl is invalid as base */
7167 intel_bracket_expr (void)
7169 int was_offset = intel_parser.op_modifier & (1 << T_OFFSET);
7170 const char *start = intel_parser.op_string;
7173 if (i.op[this_operand].regs)
7174 return intel_match_token (T_NIL);
7176 intel_match_token ('[');
7178 /* Mark as a memory operand only if it's not already known to be an
7179 offset expression. If it's an offset expression, we need to keep
7181 if (!intel_parser.in_offset)
7183 ++intel_parser.in_bracket;
7185 /* Operands for jump/call inside brackets denote absolute addresses. */
7186 if (current_templates->start->opcode_modifier & (Jump | JumpDword))
7187 i.types[this_operand] |= JumpAbsolute;
7189 /* Unfortunately gas always diverged from MASM in a respect that can't
7190 be easily fixed without risking to break code sequences likely to be
7191 encountered (the testsuite even check for this): MASM doesn't consider
7192 an expression inside brackets unconditionally as a memory reference.
7193 When that is e.g. a constant, an offset expression, or the sum of the
7194 two, this is still taken as a constant load. gas, however, always
7195 treated these as memory references. As a compromise, we'll try to make
7196 offset expressions inside brackets work the MASM way (since that's
7197 less likely to be found in real world code), but make constants alone
7198 continue to work the traditional gas way. In either case, issue a
7200 intel_parser.op_modifier &= ~was_offset;
7203 strcat (intel_parser.disp, "[");
7205 /* Add a '+' to the displacement string if necessary. */
7206 if (*intel_parser.disp != '\0'
7207 && *(intel_parser.disp + strlen (intel_parser.disp) - 1) != '+')
7208 strcat (intel_parser.disp, "+");
7211 && (len = intel_parser.op_string - start - 1,
7212 intel_match_token (']')))
7214 /* Preserve brackets when the operand is an offset expression. */
7215 if (intel_parser.in_offset)
7216 strcat (intel_parser.disp, "]");
7219 --intel_parser.in_bracket;
7220 if (i.base_reg || i.index_reg)
7221 intel_parser.is_mem = 1;
7222 if (!intel_parser.is_mem)
7224 if (!(intel_parser.op_modifier & (1 << T_OFFSET)))
7225 /* Defer the warning until all of the operand was parsed. */
7226 intel_parser.is_mem = -1;
7227 else if (!quiet_warnings)
7228 as_warn (_("`[%.*s]' taken to mean just `%.*s'"),
7229 len, start, len, start);
7232 intel_parser.op_modifier |= was_offset;
7249 while (cur_token.code == '[')
7251 if (!intel_bracket_expr ())
7276 switch (cur_token.code)
7280 intel_match_token ('(');
7281 strcat (intel_parser.disp, "(");
7283 if (intel_expr () && intel_match_token (')'))
7285 strcat (intel_parser.disp, ")");
7292 return intel_bracket_expr ();
7297 strcat (intel_parser.disp, cur_token.str);
7298 intel_match_token (cur_token.code);
7300 /* Mark as a memory operand only if it's not already known to be an
7301 offset expression. */
7302 if (!intel_parser.in_offset)
7303 intel_parser.is_mem = 1;
7310 const reg_entry *reg = intel_parser.reg = cur_token.reg;
7312 intel_match_token (T_REG);
7314 /* Check for segment change. */
7315 if (cur_token.code == ':')
7317 if (!(reg->reg_type & (SReg2 | SReg3)))
7319 as_bad (_("`%s' is not a valid segment register"),
7323 else if (i.seg[i.mem_operands])
7324 as_warn (_("Extra segment override ignored"));
7327 if (!intel_parser.in_offset)
7328 intel_parser.is_mem = 1;
7329 switch (reg->reg_num)
7332 i.seg[i.mem_operands] = &es;
7335 i.seg[i.mem_operands] = &cs;
7338 i.seg[i.mem_operands] = &ss;
7341 i.seg[i.mem_operands] = &ds;
7344 i.seg[i.mem_operands] = &fs;
7347 i.seg[i.mem_operands] = &gs;
7353 /* Not a segment register. Check for register scaling. */
7354 else if (cur_token.code == '*')
7356 if (!intel_parser.in_bracket)
7358 as_bad (_("Register scaling only allowed in memory operands"));
7362 if (reg->reg_type & Reg16) /* Disallow things like [si*1]. */
7363 reg = i386_regtab + REGNAM_AX + 4; /* sp is invalid as index */
7364 else if (i.index_reg)
7365 reg = i386_regtab + REGNAM_EAX + 4; /* esp is invalid as index */
7367 /* What follows must be a valid scale. */
7368 intel_match_token ('*');
7370 i.types[this_operand] |= BaseIndex;
7372 /* Set the scale after setting the register (otherwise,
7373 i386_scale will complain) */
7374 if (cur_token.code == '+' || cur_token.code == '-')
7376 char *str, sign = cur_token.code;
7377 intel_match_token (cur_token.code);
7378 if (cur_token.code != T_CONST)
7380 as_bad (_("Syntax error: Expecting a constant, got `%s'"),
7384 str = (char *) xmalloc (strlen (cur_token.str) + 2);
7385 strcpy (str + 1, cur_token.str);
7387 if (!i386_scale (str))
7391 else if (!i386_scale (cur_token.str))
7393 intel_match_token (cur_token.code);
7396 /* No scaling. If this is a memory operand, the register is either a
7397 base register (first occurrence) or an index register (second
7399 else if (intel_parser.in_bracket)
7404 else if (!i.index_reg)
7408 as_bad (_("Too many register references in memory operand"));
7412 i.types[this_operand] |= BaseIndex;
7415 /* It's neither base nor index. */
7416 else if (!intel_parser.in_offset && !intel_parser.is_mem)
7418 i.types[this_operand] |= reg->reg_type & ~BaseIndex;
7419 i.op[this_operand].regs = reg;
7424 as_bad (_("Invalid use of register"));
7428 /* Since registers are not part of the displacement string (except
7429 when we're parsing offset operands), we may need to remove any
7430 preceding '+' from the displacement string. */
7431 if (*intel_parser.disp != '\0'
7432 && !intel_parser.in_offset)
7434 char *s = intel_parser.disp;
7435 s += strlen (s) - 1;
7458 intel_match_token (cur_token.code);
7460 if (cur_token.code == T_PTR)
7463 /* It must have been an identifier. */
7464 intel_putback_token ();
7465 cur_token.code = T_ID;
7471 if (!intel_parser.in_offset && intel_parser.is_mem <= 0)
7475 /* The identifier represents a memory reference only if it's not
7476 preceded by an offset modifier and if it's not an equate. */
7477 symbolP = symbol_find(cur_token.str);
7478 if (!symbolP || S_GET_SEGMENT(symbolP) != absolute_section)
7479 intel_parser.is_mem = 1;
7487 char *save_str, sign = 0;
7489 /* Allow constants that start with `+' or `-'. */
7490 if (cur_token.code == '-' || cur_token.code == '+')
7492 sign = cur_token.code;
7493 intel_match_token (cur_token.code);
7494 if (cur_token.code != T_CONST)
7496 as_bad (_("Syntax error: Expecting a constant, got `%s'"),
7502 save_str = (char *) xmalloc (strlen (cur_token.str) + 2);
7503 strcpy (save_str + !!sign, cur_token.str);
7507 /* Get the next token to check for register scaling. */
7508 intel_match_token (cur_token.code);
7510 /* Check if this constant is a scaling factor for an
7512 if (cur_token.code == '*')
7514 if (intel_match_token ('*') && cur_token.code == T_REG)
7516 const reg_entry *reg = cur_token.reg;
7518 if (!intel_parser.in_bracket)
7520 as_bad (_("Register scaling only allowed "
7521 "in memory operands"));
7525 /* Disallow things like [1*si].
7526 sp and esp are invalid as index. */
7527 if (reg->reg_type & Reg16)
7528 reg = i386_regtab + REGNAM_AX + 4;
7529 else if (i.index_reg)
7530 reg = i386_regtab + REGNAM_EAX + 4;
7532 /* The constant is followed by `* reg', so it must be
7535 i.types[this_operand] |= BaseIndex;
7537 /* Set the scale after setting the register (otherwise,
7538 i386_scale will complain) */
7539 if (!i386_scale (save_str))
7541 intel_match_token (T_REG);
7543 /* Since registers are not part of the displacement
7544 string, we may need to remove any preceding '+' from
7545 the displacement string. */
7546 if (*intel_parser.disp != '\0')
7548 char *s = intel_parser.disp;
7549 s += strlen (s) - 1;
7559 /* The constant was not used for register scaling. Since we have
7560 already consumed the token following `*' we now need to put it
7561 back in the stream. */
7562 intel_putback_token ();
7565 /* Add the constant to the displacement string. */
7566 strcat (intel_parser.disp, save_str);
7573 as_bad (_("Unrecognized token '%s'"), cur_token.str);
7577 /* Match the given token against cur_token. If they match, read the next
7578 token from the operand string. */
7580 intel_match_token (int code)
7582 if (cur_token.code == code)
7589 as_bad (_("Unexpected token `%s'"), cur_token.str);
7594 /* Read a new token from intel_parser.op_string and store it in cur_token. */
7596 intel_get_token (void)
7599 const reg_entry *reg;
7600 struct intel_token new_token;
7602 new_token.code = T_NIL;
7603 new_token.reg = NULL;
7604 new_token.str = NULL;
7606 /* Free the memory allocated to the previous token and move
7607 cur_token to prev_token. */
7609 free (prev_token.str);
7611 prev_token = cur_token;
7613 /* Skip whitespace. */
7614 while (is_space_char (*intel_parser.op_string))
7615 intel_parser.op_string++;
7617 /* Return an empty token if we find nothing else on the line. */
7618 if (*intel_parser.op_string == '\0')
7620 cur_token = new_token;
7624 /* The new token cannot be larger than the remainder of the operand
7626 new_token.str = (char *) xmalloc (strlen (intel_parser.op_string) + 1);
7627 new_token.str[0] = '\0';
7629 if (strchr ("0123456789", *intel_parser.op_string))
7631 char *p = new_token.str;
7632 char *q = intel_parser.op_string;
7633 new_token.code = T_CONST;
7635 /* Allow any kind of identifier char to encompass floating point and
7636 hexadecimal numbers. */
7637 while (is_identifier_char (*q))
7641 /* Recognize special symbol names [0-9][bf]. */
7642 if (strlen (intel_parser.op_string) == 2
7643 && (intel_parser.op_string[1] == 'b'
7644 || intel_parser.op_string[1] == 'f'))
7645 new_token.code = T_ID;
7648 else if ((reg = parse_register (intel_parser.op_string, &end_op)) != NULL)
7650 size_t len = end_op - intel_parser.op_string;
7652 new_token.code = T_REG;
7653 new_token.reg = reg;
7655 memcpy (new_token.str, intel_parser.op_string, len);
7656 new_token.str[len] = '\0';
7659 else if (is_identifier_char (*intel_parser.op_string))
7661 char *p = new_token.str;
7662 char *q = intel_parser.op_string;
7664 /* A '.' or '$' followed by an identifier char is an identifier.
7665 Otherwise, it's operator '.' followed by an expression. */
7666 if ((*q == '.' || *q == '$') && !is_identifier_char (*(q + 1)))
7668 new_token.code = '.';
7669 new_token.str[0] = '.';
7670 new_token.str[1] = '\0';
7674 while (is_identifier_char (*q) || *q == '@')
7678 if (strcasecmp (new_token.str, "NOT") == 0)
7679 new_token.code = '~';
7681 else if (strcasecmp (new_token.str, "MOD") == 0)
7682 new_token.code = '%';
7684 else if (strcasecmp (new_token.str, "AND") == 0)
7685 new_token.code = '&';
7687 else if (strcasecmp (new_token.str, "OR") == 0)
7688 new_token.code = '|';
7690 else if (strcasecmp (new_token.str, "XOR") == 0)
7691 new_token.code = '^';
7693 else if (strcasecmp (new_token.str, "SHL") == 0)
7694 new_token.code = T_SHL;
7696 else if (strcasecmp (new_token.str, "SHR") == 0)
7697 new_token.code = T_SHR;
7699 else if (strcasecmp (new_token.str, "BYTE") == 0)
7700 new_token.code = T_BYTE;
7702 else if (strcasecmp (new_token.str, "WORD") == 0)
7703 new_token.code = T_WORD;
7705 else if (strcasecmp (new_token.str, "DWORD") == 0)
7706 new_token.code = T_DWORD;
7708 else if (strcasecmp (new_token.str, "FWORD") == 0)
7709 new_token.code = T_FWORD;
7711 else if (strcasecmp (new_token.str, "QWORD") == 0)
7712 new_token.code = T_QWORD;
7714 else if (strcasecmp (new_token.str, "TBYTE") == 0
7715 /* XXX remove (gcc still uses it) */
7716 || strcasecmp (new_token.str, "XWORD") == 0)
7717 new_token.code = T_TBYTE;
7719 else if (strcasecmp (new_token.str, "XMMWORD") == 0
7720 || strcasecmp (new_token.str, "OWORD") == 0)
7721 new_token.code = T_XMMWORD;
7723 else if (strcasecmp (new_token.str, "PTR") == 0)
7724 new_token.code = T_PTR;
7726 else if (strcasecmp (new_token.str, "SHORT") == 0)
7727 new_token.code = T_SHORT;
7729 else if (strcasecmp (new_token.str, "OFFSET") == 0)
7731 new_token.code = T_OFFSET;
7733 /* ??? This is not mentioned in the MASM grammar but gcc
7734 makes use of it with -mintel-syntax. OFFSET may be
7735 followed by FLAT: */
7736 if (strncasecmp (q, " FLAT:", 6) == 0)
7737 strcat (new_token.str, " FLAT:");
7740 /* ??? This is not mentioned in the MASM grammar. */
7741 else if (strcasecmp (new_token.str, "FLAT") == 0)
7743 new_token.code = T_OFFSET;
7745 strcat (new_token.str, ":");
7747 as_bad (_("`:' expected"));
7751 new_token.code = T_ID;
7755 else if (strchr ("+-/*%|&^:[]()~", *intel_parser.op_string))
7757 new_token.code = *intel_parser.op_string;
7758 new_token.str[0] = *intel_parser.op_string;
7759 new_token.str[1] = '\0';
7762 else if (strchr ("<>", *intel_parser.op_string)
7763 && *intel_parser.op_string == *(intel_parser.op_string + 1))
7765 new_token.code = *intel_parser.op_string == '<' ? T_SHL : T_SHR;
7766 new_token.str[0] = *intel_parser.op_string;
7767 new_token.str[1] = *intel_parser.op_string;
7768 new_token.str[2] = '\0';
7772 as_bad (_("Unrecognized token `%s'"), intel_parser.op_string);
7774 intel_parser.op_string += strlen (new_token.str);
7775 cur_token = new_token;
7778 /* Put cur_token back into the token stream and make cur_token point to
7781 intel_putback_token (void)
7783 if (cur_token.code != T_NIL)
7785 intel_parser.op_string -= strlen (cur_token.str);
7786 free (cur_token.str);
7788 cur_token = prev_token;
7790 /* Forget prev_token. */
7791 prev_token.code = T_NIL;
7792 prev_token.reg = NULL;
7793 prev_token.str = NULL;
7797 tc_x86_regname_to_dw2regnum (char *regname)
7799 unsigned int regnum;
7800 unsigned int regnames_count;
7801 static const char *const regnames_32[] =
7803 "eax", "ecx", "edx", "ebx",
7804 "esp", "ebp", "esi", "edi",
7805 "eip", "eflags", NULL,
7806 "st0", "st1", "st2", "st3",
7807 "st4", "st5", "st6", "st7",
7809 "xmm0", "xmm1", "xmm2", "xmm3",
7810 "xmm4", "xmm5", "xmm6", "xmm7",
7811 "mm0", "mm1", "mm2", "mm3",
7812 "mm4", "mm5", "mm6", "mm7",
7813 "fcw", "fsw", "mxcsr",
7814 "es", "cs", "ss", "ds", "fs", "gs", NULL, NULL,
7817 static const char *const regnames_64[] =
7819 "rax", "rdx", "rcx", "rbx",
7820 "rsi", "rdi", "rbp", "rsp",
7821 "r8", "r9", "r10", "r11",
7822 "r12", "r13", "r14", "r15",
7824 "xmm0", "xmm1", "xmm2", "xmm3",
7825 "xmm4", "xmm5", "xmm6", "xmm7",
7826 "xmm8", "xmm9", "xmm10", "xmm11",
7827 "xmm12", "xmm13", "xmm14", "xmm15",
7828 "st0", "st1", "st2", "st3",
7829 "st4", "st5", "st6", "st7",
7830 "mm0", "mm1", "mm2", "mm3",
7831 "mm4", "mm5", "mm6", "mm7",
7833 "es", "cs", "ss", "ds", "fs", "gs", NULL, NULL,
7834 "fs.base", "gs.base", NULL, NULL,
7836 "mxcsr", "fcw", "fsw"
7838 const char *const *regnames;
7840 if (flag_code == CODE_64BIT)
7842 regnames = regnames_64;
7843 regnames_count = ARRAY_SIZE (regnames_64);
7847 regnames = regnames_32;
7848 regnames_count = ARRAY_SIZE (regnames_32);
7851 for (regnum = 0; regnum < regnames_count; regnum++)
7852 if (regnames[regnum] != NULL
7853 && strcmp (regname, regnames[regnum]) == 0)
7860 tc_x86_frame_initial_instructions (void)
7862 static unsigned int sp_regno;
7865 sp_regno = tc_x86_regname_to_dw2regnum (flag_code == CODE_64BIT
7868 cfi_add_CFA_def_cfa (sp_regno, -x86_cie_data_alignment);
7869 cfi_add_CFA_offset (x86_dwarf2_return_column, x86_cie_data_alignment);
7873 i386_elf_section_type (const char *str, size_t len)
7875 if (flag_code == CODE_64BIT
7876 && len == sizeof ("unwind") - 1
7877 && strncmp (str, "unwind", 6) == 0)
7878 return SHT_X86_64_UNWIND;
7885 tc_pe_dwarf2_emit_offset (symbolS *symbol, unsigned int size)
7889 expr.X_op = O_secrel;
7890 expr.X_add_symbol = symbol;
7891 expr.X_add_number = 0;
7892 emit_expr (&expr, size);
7896 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
7897 /* For ELF on x86-64, add support for SHF_X86_64_LARGE. */
7900 x86_64_section_letter (int letter, char **ptr_msg)
7902 if (flag_code == CODE_64BIT)
7905 return SHF_X86_64_LARGE;
7907 *ptr_msg = _("Bad .section directive: want a,l,w,x,M,S,G,T in string");
7910 *ptr_msg = _("Bad .section directive: want a,w,x,M,S,G,T in string");
7915 x86_64_section_word (char *str, size_t len)
7917 if (len == 5 && flag_code == CODE_64BIT && CONST_STRNEQ (str, "large"))
7918 return SHF_X86_64_LARGE;
7924 handle_large_common (int small ATTRIBUTE_UNUSED)
7926 if (flag_code != CODE_64BIT)
7928 s_comm_internal (0, elf_common_parse);
7929 as_warn (_(".largecomm supported only in 64bit mode, producing .comm"));
7933 static segT lbss_section;
7934 asection *saved_com_section_ptr = elf_com_section_ptr;
7935 asection *saved_bss_section = bss_section;
7937 if (lbss_section == NULL)
7939 flagword applicable;
7941 subsegT subseg = now_subseg;
7943 /* The .lbss section is for local .largecomm symbols. */
7944 lbss_section = subseg_new (".lbss", 0);
7945 applicable = bfd_applicable_section_flags (stdoutput);
7946 bfd_set_section_flags (stdoutput, lbss_section,
7947 applicable & SEC_ALLOC);
7948 seg_info (lbss_section)->bss = 1;
7950 subseg_set (seg, subseg);
7953 elf_com_section_ptr = &_bfd_elf_large_com_section;
7954 bss_section = lbss_section;
7956 s_comm_internal (0, elf_common_parse);
7958 elf_com_section_ptr = saved_com_section_ptr;
7959 bss_section = saved_bss_section;
7962 #endif /* OBJ_ELF || OBJ_MAYBE_ELF */