1 /* i386.c -- Assemble code for the Intel 80386
2 Copyright 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004, 2005, 2006
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 /* Intel 80386 machine specific gas.
24 Written by Eliot Dresselhaus (eliot@mgm.mit.edu).
25 x86_64 support by Jan Hubicka (jh@suse.cz)
26 VIA PadLock support by Michal Ludvig (mludvig@suse.cz)
27 Bugs & suggestions are completely welcome. This is free software.
28 Please help us make it better. */
31 #include "safe-ctype.h"
33 #include "dwarf2dbg.h"
34 #include "dw2gencfi.h"
35 #include "opcode/i386.h"
36 #include "elf/x86-64.h"
38 #ifndef REGISTER_WARNINGS
39 #define REGISTER_WARNINGS 1
42 #ifndef INFER_ADDR_PREFIX
43 #define INFER_ADDR_PREFIX 1
46 #ifndef SCALE1_WHEN_NO_INDEX
47 /* Specifying a scale factor besides 1 when there is no index is
48 futile. eg. `mov (%ebx,2),%al' does exactly the same as
49 `mov (%ebx),%al'. To slavishly follow what the programmer
50 specified, set SCALE1_WHEN_NO_INDEX to 0. */
51 #define SCALE1_WHEN_NO_INDEX 1
55 #define DEFAULT_ARCH "i386"
60 #define INLINE __inline__
66 static INLINE unsigned int mode_from_disp_size PARAMS ((unsigned int));
67 static INLINE int fits_in_signed_byte PARAMS ((offsetT));
68 static INLINE int fits_in_unsigned_byte PARAMS ((offsetT));
69 static INLINE int fits_in_unsigned_word PARAMS ((offsetT));
70 static INLINE int fits_in_signed_word PARAMS ((offsetT));
71 static INLINE int fits_in_unsigned_long PARAMS ((offsetT));
72 static INLINE int fits_in_signed_long PARAMS ((offsetT));
73 static int smallest_imm_type PARAMS ((offsetT));
74 static offsetT offset_in_range PARAMS ((offsetT, int));
75 static int add_prefix PARAMS ((unsigned int));
76 static void set_code_flag PARAMS ((int));
77 static void set_16bit_gcc_code_flag PARAMS ((int));
78 static void set_intel_syntax PARAMS ((int));
79 static void set_cpu_arch PARAMS ((int));
81 static void pe_directive_secrel PARAMS ((int));
83 static void signed_cons PARAMS ((int));
84 static char *output_invalid PARAMS ((int c));
85 static int i386_operand PARAMS ((char *operand_string));
86 static int i386_intel_operand PARAMS ((char *operand_string, int got_a_float));
87 static const reg_entry *parse_register PARAMS ((char *reg_string,
89 static char *parse_insn PARAMS ((char *, char *));
90 static char *parse_operands PARAMS ((char *, const char *));
91 static void swap_operands PARAMS ((void));
92 static void optimize_imm PARAMS ((void));
93 static void optimize_disp PARAMS ((void));
94 static int match_template PARAMS ((void));
95 static int check_string PARAMS ((void));
96 static int process_suffix PARAMS ((void));
97 static int check_byte_reg PARAMS ((void));
98 static int check_long_reg PARAMS ((void));
99 static int check_qword_reg PARAMS ((void));
100 static int check_word_reg PARAMS ((void));
101 static int finalize_imm PARAMS ((void));
102 static int process_operands PARAMS ((void));
103 static const seg_entry *build_modrm_byte PARAMS ((void));
104 static void output_insn PARAMS ((void));
105 static void output_branch PARAMS ((void));
106 static void output_jump PARAMS ((void));
107 static void output_interseg_jump PARAMS ((void));
108 static void output_imm PARAMS ((fragS *insn_start_frag,
109 offsetT insn_start_off));
110 static void output_disp PARAMS ((fragS *insn_start_frag,
111 offsetT insn_start_off));
113 static void s_bss PARAMS ((int));
115 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
116 static void handle_large_common (int small ATTRIBUTE_UNUSED);
119 static const char *default_arch = DEFAULT_ARCH;
121 /* 'md_assemble ()' gathers together information and puts it into a
128 const reg_entry *regs;
133 /* TM holds the template for the insn were currently assembling. */
136 /* SUFFIX holds the instruction mnemonic suffix if given.
137 (e.g. 'l' for 'movl') */
140 /* OPERANDS gives the number of given operands. */
141 unsigned int operands;
143 /* REG_OPERANDS, DISP_OPERANDS, MEM_OPERANDS, IMM_OPERANDS give the number
144 of given register, displacement, memory operands and immediate
146 unsigned int reg_operands, disp_operands, mem_operands, imm_operands;
148 /* TYPES [i] is the type (see above #defines) which tells us how to
149 use OP[i] for the corresponding operand. */
150 unsigned int types[MAX_OPERANDS];
152 /* Displacement expression, immediate expression, or register for each
154 union i386_op op[MAX_OPERANDS];
156 /* Flags for operands. */
157 unsigned int flags[MAX_OPERANDS];
158 #define Operand_PCrel 1
160 /* Relocation type for operand */
161 enum bfd_reloc_code_real reloc[MAX_OPERANDS];
163 /* BASE_REG, INDEX_REG, and LOG2_SCALE_FACTOR are used to encode
164 the base index byte below. */
165 const reg_entry *base_reg;
166 const reg_entry *index_reg;
167 unsigned int log2_scale_factor;
169 /* SEG gives the seg_entries of this insn. They are zero unless
170 explicit segment overrides are given. */
171 const seg_entry *seg[2];
173 /* PREFIX holds all the given prefix opcodes (usually null).
174 PREFIXES is the number of prefix opcodes. */
175 unsigned int prefixes;
176 unsigned char prefix[MAX_PREFIXES];
178 /* RM and SIB are the modrm byte and the sib byte where the
179 addressing modes of this insn are encoded. */
186 typedef struct _i386_insn i386_insn;
188 /* List of chars besides those in app.c:symbol_chars that can start an
189 operand. Used to prevent the scrubber eating vital white-space. */
190 const char extra_symbol_chars[] = "*%-(["
199 #if (defined (TE_I386AIX) \
200 || ((defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) \
201 && !defined (TE_GNU) \
202 && !defined (TE_LINUX) \
203 && !defined (TE_NETWARE) \
204 && !defined (TE_FreeBSD) \
205 && !defined (TE_NetBSD)))
206 /* This array holds the chars that always start a comment. If the
207 pre-processor is disabled, these aren't very useful. The option
208 --divide will remove '/' from this list. */
209 const char *i386_comment_chars = "#/";
210 #define SVR4_COMMENT_CHARS 1
211 #define PREFIX_SEPARATOR '\\'
214 const char *i386_comment_chars = "#";
215 #define PREFIX_SEPARATOR '/'
218 /* This array holds the chars that only start a comment at the beginning of
219 a line. If the line seems to have the form '# 123 filename'
220 .line and .file directives will appear in the pre-processed output.
221 Note that input_file.c hand checks for '#' at the beginning of the
222 first line of the input file. This is because the compiler outputs
223 #NO_APP at the beginning of its output.
224 Also note that comments started like this one will always work if
225 '/' isn't otherwise defined. */
226 const char line_comment_chars[] = "#/";
228 const char line_separator_chars[] = ";";
230 /* Chars that can be used to separate mant from exp in floating point
232 const char EXP_CHARS[] = "eE";
234 /* Chars that mean this number is a floating point constant
237 const char FLT_CHARS[] = "fFdDxX";
239 /* Tables for lexical analysis. */
240 static char mnemonic_chars[256];
241 static char register_chars[256];
242 static char operand_chars[256];
243 static char identifier_chars[256];
244 static char digit_chars[256];
246 /* Lexical macros. */
247 #define is_mnemonic_char(x) (mnemonic_chars[(unsigned char) x])
248 #define is_operand_char(x) (operand_chars[(unsigned char) x])
249 #define is_register_char(x) (register_chars[(unsigned char) x])
250 #define is_space_char(x) ((x) == ' ')
251 #define is_identifier_char(x) (identifier_chars[(unsigned char) x])
252 #define is_digit_char(x) (digit_chars[(unsigned char) x])
254 /* All non-digit non-letter characters that may occur in an operand. */
255 static char operand_special_chars[] = "%$-+(,)*._~/<>|&^!:[@]";
257 /* md_assemble() always leaves the strings it's passed unaltered. To
258 effect this we maintain a stack of saved characters that we've smashed
259 with '\0's (indicating end of strings for various sub-fields of the
260 assembler instruction). */
261 static char save_stack[32];
262 static char *save_stack_p;
263 #define END_STRING_AND_SAVE(s) \
264 do { *save_stack_p++ = *(s); *(s) = '\0'; } while (0)
265 #define RESTORE_END_STRING(s) \
266 do { *(s) = *--save_stack_p; } while (0)
268 /* The instruction we're assembling. */
271 /* Possible templates for current insn. */
272 static const templates *current_templates;
274 /* Per instruction expressionS buffers: 2 displacements & 2 immediate max. */
275 static expressionS disp_expressions[2], im_expressions[2];
277 /* Current operand we are working on. */
278 static int this_operand;
280 /* We support four different modes. FLAG_CODE variable is used to distinguish
287 #define NUM_FLAG_CODE ((int) CODE_64BIT + 1)
289 static enum flag_code flag_code;
290 static unsigned int object_64bit;
291 static int use_rela_relocations = 0;
293 /* The names used to print error messages. */
294 static const char *flag_code_names[] =
301 /* 1 for intel syntax,
303 static int intel_syntax = 0;
305 /* 1 if register prefix % not required. */
306 static int allow_naked_reg = 0;
308 /* Used in 16 bit gcc mode to add an l suffix to call, ret, enter,
309 leave, push, and pop instructions so that gcc has the same stack
310 frame as in 32 bit mode. */
311 static char stackop_size = '\0';
313 /* Non-zero to optimize code alignment. */
314 int optimize_align_code = 1;
316 /* Non-zero to quieten some warnings. */
317 static int quiet_warnings = 0;
320 static const char *cpu_arch_name = NULL;
321 static const char *cpu_sub_arch_name = NULL;
323 /* CPU feature flags. */
324 static unsigned int cpu_arch_flags = CpuUnknownFlags | CpuNo64;
326 /* Cpu we are generating instructions for. */
327 static enum processor_type cpu_arch_tune = PROCESSOR_UNKNOWN;
329 /* CPU feature flags of cpu we are generating instructions for. */
330 static unsigned int cpu_arch_tune_flags = 0;
332 /* CPU feature flags of instruction set architecture used. */
333 static unsigned int cpu_arch_isa_flags = 0;
335 /* If set, conditional jumps are not automatically promoted to handle
336 larger than a byte offset. */
337 static unsigned int no_cond_jump_promotion = 0;
339 /* Pre-defined "_GLOBAL_OFFSET_TABLE_". */
340 static symbolS *GOT_symbol;
342 /* The dwarf2 return column, adjusted for 32 or 64 bit. */
343 unsigned int x86_dwarf2_return_column;
345 /* The dwarf2 data alignment, adjusted for 32 or 64 bit. */
346 int x86_cie_data_alignment;
348 /* Interface to relax_segment.
349 There are 3 major relax states for 386 jump insns because the
350 different types of jumps add different sizes to frags when we're
351 figuring out what sort of jump to choose to reach a given label. */
354 #define UNCOND_JUMP 0
356 #define COND_JUMP86 2
361 #define SMALL16 (SMALL | CODE16)
363 #define BIG16 (BIG | CODE16)
367 #define INLINE __inline__
373 #define ENCODE_RELAX_STATE(type, size) \
374 ((relax_substateT) (((type) << 2) | (size)))
375 #define TYPE_FROM_RELAX_STATE(s) \
377 #define DISP_SIZE_FROM_RELAX_STATE(s) \
378 ((((s) & 3) == BIG ? 4 : (((s) & 3) == BIG16 ? 2 : 1)))
380 /* This table is used by relax_frag to promote short jumps to long
381 ones where necessary. SMALL (short) jumps may be promoted to BIG
382 (32 bit long) ones, and SMALL16 jumps to BIG16 (16 bit long). We
383 don't allow a short jump in a 32 bit code segment to be promoted to
384 a 16 bit offset jump because it's slower (requires data size
385 prefix), and doesn't work, unless the destination is in the bottom
386 64k of the code segment (The top 16 bits of eip are zeroed). */
388 const relax_typeS md_relax_table[] =
391 1) most positive reach of this state,
392 2) most negative reach of this state,
393 3) how many bytes this mode will have in the variable part of the frag
394 4) which index into the table to try if we can't fit into this one. */
396 /* UNCOND_JUMP states. */
397 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (UNCOND_JUMP, BIG)},
398 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (UNCOND_JUMP, BIG16)},
399 /* dword jmp adds 4 bytes to frag:
400 0 extra opcode bytes, 4 displacement bytes. */
402 /* word jmp adds 2 byte2 to frag:
403 0 extra opcode bytes, 2 displacement bytes. */
406 /* COND_JUMP states. */
407 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP, BIG)},
408 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP, BIG16)},
409 /* dword conditionals adds 5 bytes to frag:
410 1 extra opcode byte, 4 displacement bytes. */
412 /* word conditionals add 3 bytes to frag:
413 1 extra opcode byte, 2 displacement bytes. */
416 /* COND_JUMP86 states. */
417 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP86, BIG)},
418 {127 + 1, -128 + 1, 1, ENCODE_RELAX_STATE (COND_JUMP86, BIG16)},
419 /* dword conditionals adds 5 bytes to frag:
420 1 extra opcode byte, 4 displacement bytes. */
422 /* word conditionals add 4 bytes to frag:
423 1 displacement byte and a 3 byte long branch insn. */
427 static const arch_entry cpu_arch[] =
429 {"generic32", PROCESSOR_GENERIC32,
430 Cpu086|Cpu186|Cpu286|Cpu386},
431 {"generic64", PROCESSOR_GENERIC64,
432 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
433 |CpuMMX2|CpuSSE|CpuSSE2},
434 {"i8086", PROCESSOR_UNKNOWN,
436 {"i186", PROCESSOR_UNKNOWN,
438 {"i286", PROCESSOR_UNKNOWN,
439 Cpu086|Cpu186|Cpu286},
440 {"i386", PROCESSOR_GENERIC32,
441 Cpu086|Cpu186|Cpu286|Cpu386},
442 {"i486", PROCESSOR_I486,
443 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486},
444 {"i586", PROCESSOR_PENTIUM,
445 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586},
446 {"i686", PROCESSOR_PENTIUMPRO,
447 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686},
448 {"pentium", PROCESSOR_PENTIUM,
449 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586},
450 {"pentiumpro",PROCESSOR_PENTIUMPRO,
451 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686},
452 {"pentiumii", PROCESSOR_PENTIUMPRO,
453 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuMMX},
454 {"pentiumiii",PROCESSOR_PENTIUMPRO,
455 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuMMX|CpuMMX2
457 {"pentium4", PROCESSOR_PENTIUM4,
458 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
459 |CpuMMX2|CpuSSE|CpuSSE2},
460 {"prescott", PROCESSOR_NOCONA,
461 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
462 |CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3},
463 {"nocona", PROCESSOR_NOCONA,
464 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
465 |CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3},
466 {"yonah", PROCESSOR_YONAH,
467 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
468 |CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3},
469 {"merom", PROCESSOR_MEROM,
470 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuP4|CpuMMX
471 |CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3|CpuMNI},
473 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|CpuK6|CpuMMX},
474 {"k6_2", PROCESSOR_K6,
475 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|CpuK6|CpuMMX|Cpu3dnow},
476 {"athlon", PROCESSOR_ATHLON,
477 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuK6|CpuAthlon
478 |CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA},
479 {"sledgehammer", PROCESSOR_K8,
480 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuK6|CpuAthlon
481 |CpuSledgehammer|CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA|CpuSSE|CpuSSE2},
482 {"opteron", PROCESSOR_K8,
483 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuK6|CpuAthlon
484 |CpuSledgehammer|CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA|CpuSSE|CpuSSE2},
486 Cpu086|Cpu186|Cpu286|Cpu386|Cpu486|Cpu586|Cpu686|CpuK6|CpuAthlon
487 |CpuSledgehammer|CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA|CpuSSE|CpuSSE2},
488 {".mmx", PROCESSOR_UNKNOWN,
490 {".sse", PROCESSOR_UNKNOWN,
491 CpuMMX|CpuMMX2|CpuSSE},
492 {".sse2", PROCESSOR_UNKNOWN,
493 CpuMMX|CpuMMX2|CpuSSE|CpuSSE2},
494 {".sse3", PROCESSOR_UNKNOWN,
495 CpuMMX|CpuMMX2|CpuSSE|CpuSSE2|CpuSSE3},
496 {".3dnow", PROCESSOR_UNKNOWN,
498 {".3dnowa", PROCESSOR_UNKNOWN,
499 CpuMMX|CpuMMX2|Cpu3dnow|Cpu3dnowA},
500 {".padlock", PROCESSOR_UNKNOWN,
502 {".pacifica", PROCESSOR_UNKNOWN,
504 {".svme", PROCESSOR_UNKNOWN,
508 const pseudo_typeS md_pseudo_table[] =
510 #if !defined(OBJ_AOUT) && !defined(USE_ALIGN_PTWO)
511 {"align", s_align_bytes, 0},
513 {"align", s_align_ptwo, 0},
515 {"arch", set_cpu_arch, 0},
519 {"ffloat", float_cons, 'f'},
520 {"dfloat", float_cons, 'd'},
521 {"tfloat", float_cons, 'x'},
523 {"slong", signed_cons, 4},
524 {"noopt", s_ignore, 0},
525 {"optim", s_ignore, 0},
526 {"code16gcc", set_16bit_gcc_code_flag, CODE_16BIT},
527 {"code16", set_code_flag, CODE_16BIT},
528 {"code32", set_code_flag, CODE_32BIT},
529 {"code64", set_code_flag, CODE_64BIT},
530 {"intel_syntax", set_intel_syntax, 1},
531 {"att_syntax", set_intel_syntax, 0},
532 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
533 {"largecomm", handle_large_common, 0},
535 {"file", (void (*) PARAMS ((int))) dwarf2_directive_file, 0},
536 {"loc", dwarf2_directive_loc, 0},
537 {"loc_mark_labels", dwarf2_directive_loc_mark_labels, 0},
540 {"secrel32", pe_directive_secrel, 0},
545 /* For interface with expression (). */
546 extern char *input_line_pointer;
548 /* Hash table for instruction mnemonic lookup. */
549 static struct hash_control *op_hash;
551 /* Hash table for register lookup. */
552 static struct hash_control *reg_hash;
555 i386_align_code (fragP, count)
559 /* Various efficient no-op patterns for aligning code labels.
560 Note: Don't try to assemble the instructions in the comments.
561 0L and 0w are not legal. */
562 static const char f32_1[] =
564 static const char f32_2[] =
565 {0x89,0xf6}; /* movl %esi,%esi */
566 static const char f32_3[] =
567 {0x8d,0x76,0x00}; /* leal 0(%esi),%esi */
568 static const char f32_4[] =
569 {0x8d,0x74,0x26,0x00}; /* leal 0(%esi,1),%esi */
570 static const char f32_5[] =
572 0x8d,0x74,0x26,0x00}; /* leal 0(%esi,1),%esi */
573 static const char f32_6[] =
574 {0x8d,0xb6,0x00,0x00,0x00,0x00}; /* leal 0L(%esi),%esi */
575 static const char f32_7[] =
576 {0x8d,0xb4,0x26,0x00,0x00,0x00,0x00}; /* leal 0L(%esi,1),%esi */
577 static const char f32_8[] =
579 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00}; /* leal 0L(%esi,1),%esi */
580 static const char f32_9[] =
581 {0x89,0xf6, /* movl %esi,%esi */
582 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
583 static const char f32_10[] =
584 {0x8d,0x76,0x00, /* leal 0(%esi),%esi */
585 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
586 static const char f32_11[] =
587 {0x8d,0x74,0x26,0x00, /* leal 0(%esi,1),%esi */
588 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
589 static const char f32_12[] =
590 {0x8d,0xb6,0x00,0x00,0x00,0x00, /* leal 0L(%esi),%esi */
591 0x8d,0xbf,0x00,0x00,0x00,0x00}; /* leal 0L(%edi),%edi */
592 static const char f32_13[] =
593 {0x8d,0xb6,0x00,0x00,0x00,0x00, /* leal 0L(%esi),%esi */
594 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
595 static const char f32_14[] =
596 {0x8d,0xb4,0x26,0x00,0x00,0x00,0x00, /* leal 0L(%esi,1),%esi */
597 0x8d,0xbc,0x27,0x00,0x00,0x00,0x00}; /* leal 0L(%edi,1),%edi */
598 static const char f32_15[] =
599 {0xeb,0x0d,0x90,0x90,0x90,0x90,0x90, /* jmp .+15; lotsa nops */
600 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90};
601 static const char f16_3[] =
602 {0x8d,0x74,0x00}; /* lea 0(%esi),%esi */
603 static const char f16_4[] =
604 {0x8d,0xb4,0x00,0x00}; /* lea 0w(%si),%si */
605 static const char f16_5[] =
607 0x8d,0xb4,0x00,0x00}; /* lea 0w(%si),%si */
608 static const char f16_6[] =
609 {0x89,0xf6, /* mov %si,%si */
610 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
611 static const char f16_7[] =
612 {0x8d,0x74,0x00, /* lea 0(%si),%si */
613 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
614 static const char f16_8[] =
615 {0x8d,0xb4,0x00,0x00, /* lea 0w(%si),%si */
616 0x8d,0xbd,0x00,0x00}; /* lea 0w(%di),%di */
617 static const char *const f32_patt[] = {
618 f32_1, f32_2, f32_3, f32_4, f32_5, f32_6, f32_7, f32_8,
619 f32_9, f32_10, f32_11, f32_12, f32_13, f32_14, f32_15
621 static const char *const f16_patt[] = {
622 f32_1, f32_2, f16_3, f16_4, f16_5, f16_6, f16_7, f16_8,
623 f32_15, f32_15, f32_15, f32_15, f32_15, f32_15, f32_15
626 if (count <= 0 || count > 15)
629 /* The recommended way to pad 64bit code is to use NOPs preceded by
630 maximally four 0x66 prefixes. Balance the size of nops. */
631 if (flag_code == CODE_64BIT)
634 int nnops = (count + 3) / 4;
635 int len = count / nnops;
636 int remains = count - nnops * len;
639 for (i = 0; i < remains; i++)
641 memset (fragP->fr_literal + fragP->fr_fix + pos, 0x66, len);
642 fragP->fr_literal[fragP->fr_fix + pos + len] = 0x90;
645 for (; i < nnops; i++)
647 memset (fragP->fr_literal + fragP->fr_fix + pos, 0x66, len - 1);
648 fragP->fr_literal[fragP->fr_fix + pos + len - 1] = 0x90;
653 if (flag_code == CODE_16BIT)
655 memcpy (fragP->fr_literal + fragP->fr_fix,
656 f16_patt[count - 1], count);
658 /* Adjust jump offset. */
659 fragP->fr_literal[fragP->fr_fix + 1] = count - 2;
662 memcpy (fragP->fr_literal + fragP->fr_fix,
663 f32_patt[count - 1], count);
664 fragP->fr_var = count;
667 static INLINE unsigned int
668 mode_from_disp_size (t)
671 return (t & Disp8) ? 1 : (t & (Disp16 | Disp32 | Disp32S)) ? 2 : 0;
675 fits_in_signed_byte (num)
678 return (num >= -128) && (num <= 127);
682 fits_in_unsigned_byte (num)
685 return (num & 0xff) == num;
689 fits_in_unsigned_word (num)
692 return (num & 0xffff) == num;
696 fits_in_signed_word (num)
699 return (-32768 <= num) && (num <= 32767);
702 fits_in_signed_long (num)
703 offsetT num ATTRIBUTE_UNUSED;
708 return (!(((offsetT) -1 << 31) & num)
709 || (((offsetT) -1 << 31) & num) == ((offsetT) -1 << 31));
711 } /* fits_in_signed_long() */
713 fits_in_unsigned_long (num)
714 offsetT num ATTRIBUTE_UNUSED;
719 return (num & (((offsetT) 2 << 31) - 1)) == num;
721 } /* fits_in_unsigned_long() */
724 smallest_imm_type (num)
727 if (cpu_arch_flags != (Cpu086 | Cpu186 | Cpu286 | Cpu386 | Cpu486 | CpuNo64))
729 /* This code is disabled on the 486 because all the Imm1 forms
730 in the opcode table are slower on the i486. They're the
731 versions with the implicitly specified single-position
732 displacement, which has another syntax if you really want to
735 return Imm1 | Imm8 | Imm8S | Imm16 | Imm32 | Imm32S | Imm64;
737 return (fits_in_signed_byte (num)
738 ? (Imm8S | Imm8 | Imm16 | Imm32 | Imm32S | Imm64)
739 : fits_in_unsigned_byte (num)
740 ? (Imm8 | Imm16 | Imm32 | Imm32S | Imm64)
741 : (fits_in_signed_word (num) || fits_in_unsigned_word (num))
742 ? (Imm16 | Imm32 | Imm32S | Imm64)
743 : fits_in_signed_long (num)
744 ? (Imm32 | Imm32S | Imm64)
745 : fits_in_unsigned_long (num)
751 offset_in_range (val, size)
759 case 1: mask = ((addressT) 1 << 8) - 1; break;
760 case 2: mask = ((addressT) 1 << 16) - 1; break;
761 case 4: mask = ((addressT) 2 << 31) - 1; break;
763 case 8: mask = ((addressT) 2 << 63) - 1; break;
768 /* If BFD64, sign extend val. */
769 if (!use_rela_relocations)
770 if ((val & ~(((addressT) 2 << 31) - 1)) == 0)
771 val = (val ^ ((addressT) 1 << 31)) - ((addressT) 1 << 31);
773 if ((val & ~mask) != 0 && (val & ~mask) != ~mask)
775 char buf1[40], buf2[40];
777 sprint_value (buf1, val);
778 sprint_value (buf2, val & mask);
779 as_warn (_("%s shortened to %s"), buf1, buf2);
784 /* Returns 0 if attempting to add a prefix where one from the same
785 class already exists, 1 if non rep/repne added, 2 if rep/repne
794 if (prefix >= REX_OPCODE && prefix < REX_OPCODE + 16
795 && flag_code == CODE_64BIT)
797 if ((i.prefix[REX_PREFIX] & prefix & REX_MODE64)
798 || ((i.prefix[REX_PREFIX] & (REX_EXTX | REX_EXTY | REX_EXTZ))
799 && (prefix & (REX_EXTX | REX_EXTY | REX_EXTZ))))
810 case CS_PREFIX_OPCODE:
811 case DS_PREFIX_OPCODE:
812 case ES_PREFIX_OPCODE:
813 case FS_PREFIX_OPCODE:
814 case GS_PREFIX_OPCODE:
815 case SS_PREFIX_OPCODE:
819 case REPNE_PREFIX_OPCODE:
820 case REPE_PREFIX_OPCODE:
823 case LOCK_PREFIX_OPCODE:
831 case ADDR_PREFIX_OPCODE:
835 case DATA_PREFIX_OPCODE:
839 if (i.prefix[q] != 0)
847 i.prefix[q] |= prefix;
850 as_bad (_("same type of prefix used twice"));
856 set_code_flag (value)
860 cpu_arch_flags &= ~(Cpu64 | CpuNo64);
861 cpu_arch_flags |= (flag_code == CODE_64BIT ? Cpu64 : CpuNo64);
862 if (value == CODE_64BIT && !(cpu_arch_flags & CpuSledgehammer))
864 as_bad (_("64bit mode not supported on this CPU."));
866 if (value == CODE_32BIT && !(cpu_arch_flags & Cpu386))
868 as_bad (_("32bit mode not supported on this CPU."));
874 set_16bit_gcc_code_flag (new_code_flag)
877 flag_code = new_code_flag;
878 cpu_arch_flags &= ~(Cpu64 | CpuNo64);
879 cpu_arch_flags |= (flag_code == CODE_64BIT ? Cpu64 : CpuNo64);
880 stackop_size = LONG_MNEM_SUFFIX;
884 set_intel_syntax (syntax_flag)
887 /* Find out if register prefixing is specified. */
888 int ask_naked_reg = 0;
891 if (!is_end_of_line[(unsigned char) *input_line_pointer])
893 char *string = input_line_pointer;
894 int e = get_symbol_end ();
896 if (strcmp (string, "prefix") == 0)
898 else if (strcmp (string, "noprefix") == 0)
901 as_bad (_("bad argument to syntax directive."));
902 *input_line_pointer = e;
904 demand_empty_rest_of_line ();
906 intel_syntax = syntax_flag;
908 if (ask_naked_reg == 0)
909 allow_naked_reg = (intel_syntax
910 && (bfd_get_symbol_leading_char (stdoutput) != '\0'));
912 allow_naked_reg = (ask_naked_reg < 0);
914 identifier_chars['%'] = intel_syntax && allow_naked_reg ? '%' : 0;
915 identifier_chars['$'] = intel_syntax ? '$' : 0;
920 int dummy ATTRIBUTE_UNUSED;
924 if (!is_end_of_line[(unsigned char) *input_line_pointer])
926 char *string = input_line_pointer;
927 int e = get_symbol_end ();
930 for (i = 0; i < ARRAY_SIZE (cpu_arch); i++)
932 if (strcmp (string, cpu_arch[i].name) == 0)
936 cpu_arch_name = cpu_arch[i].name;
937 cpu_sub_arch_name = NULL;
938 cpu_arch_flags = (cpu_arch[i].flags
939 | (flag_code == CODE_64BIT ? Cpu64 : CpuNo64));
940 cpu_arch_isa_flags = cpu_arch[i].flags;
943 if ((cpu_arch_flags | cpu_arch[i].flags) != cpu_arch_flags)
945 cpu_sub_arch_name = cpu_arch[i].name;
946 cpu_arch_flags |= cpu_arch[i].flags;
948 *input_line_pointer = e;
949 demand_empty_rest_of_line ();
953 if (i >= ARRAY_SIZE (cpu_arch))
954 as_bad (_("no such architecture: `%s'"), string);
956 *input_line_pointer = e;
959 as_bad (_("missing cpu architecture"));
961 no_cond_jump_promotion = 0;
962 if (*input_line_pointer == ','
963 && !is_end_of_line[(unsigned char) input_line_pointer[1]])
965 char *string = ++input_line_pointer;
966 int e = get_symbol_end ();
968 if (strcmp (string, "nojumps") == 0)
969 no_cond_jump_promotion = 1;
970 else if (strcmp (string, "jumps") == 0)
973 as_bad (_("no such architecture modifier: `%s'"), string);
975 *input_line_pointer = e;
978 demand_empty_rest_of_line ();
984 if (!strcmp (default_arch, "x86_64"))
985 return bfd_mach_x86_64;
986 else if (!strcmp (default_arch, "i386"))
987 return bfd_mach_i386_i386;
989 as_fatal (_("Unknown architecture"));
995 const char *hash_err;
997 /* Initialize op_hash hash table. */
998 op_hash = hash_new ();
1001 const template *optab;
1002 templates *core_optab;
1004 /* Setup for loop. */
1006 core_optab = (templates *) xmalloc (sizeof (templates));
1007 core_optab->start = optab;
1012 if (optab->name == NULL
1013 || strcmp (optab->name, (optab - 1)->name) != 0)
1015 /* different name --> ship out current template list;
1016 add to hash table; & begin anew. */
1017 core_optab->end = optab;
1018 hash_err = hash_insert (op_hash,
1023 as_fatal (_("Internal Error: Can't hash %s: %s"),
1027 if (optab->name == NULL)
1029 core_optab = (templates *) xmalloc (sizeof (templates));
1030 core_optab->start = optab;
1035 /* Initialize reg_hash hash table. */
1036 reg_hash = hash_new ();
1038 const reg_entry *regtab;
1040 for (regtab = i386_regtab;
1041 regtab < i386_regtab + sizeof (i386_regtab) / sizeof (i386_regtab[0]);
1044 hash_err = hash_insert (reg_hash, regtab->reg_name, (PTR) regtab);
1046 as_fatal (_("Internal Error: Can't hash %s: %s"),
1052 /* Fill in lexical tables: mnemonic_chars, operand_chars. */
1057 for (c = 0; c < 256; c++)
1062 mnemonic_chars[c] = c;
1063 register_chars[c] = c;
1064 operand_chars[c] = c;
1066 else if (ISLOWER (c))
1068 mnemonic_chars[c] = c;
1069 register_chars[c] = c;
1070 operand_chars[c] = c;
1072 else if (ISUPPER (c))
1074 mnemonic_chars[c] = TOLOWER (c);
1075 register_chars[c] = mnemonic_chars[c];
1076 operand_chars[c] = c;
1079 if (ISALPHA (c) || ISDIGIT (c))
1080 identifier_chars[c] = c;
1083 identifier_chars[c] = c;
1084 operand_chars[c] = c;
1089 identifier_chars['@'] = '@';
1092 identifier_chars['?'] = '?';
1093 operand_chars['?'] = '?';
1095 digit_chars['-'] = '-';
1096 mnemonic_chars['-'] = '-';
1097 identifier_chars['_'] = '_';
1098 identifier_chars['.'] = '.';
1100 for (p = operand_special_chars; *p != '\0'; p++)
1101 operand_chars[(unsigned char) *p] = *p;
1104 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
1107 record_alignment (text_section, 2);
1108 record_alignment (data_section, 2);
1109 record_alignment (bss_section, 2);
1113 if (flag_code == CODE_64BIT)
1115 x86_dwarf2_return_column = 16;
1116 x86_cie_data_alignment = -8;
1120 x86_dwarf2_return_column = 8;
1121 x86_cie_data_alignment = -4;
1126 i386_print_statistics (file)
1129 hash_print_statistics (file, "i386 opcode", op_hash);
1130 hash_print_statistics (file, "i386 register", reg_hash);
1135 /* Debugging routines for md_assemble. */
1136 static void pi PARAMS ((char *, i386_insn *));
1137 static void pte PARAMS ((template *));
1138 static void pt PARAMS ((unsigned int));
1139 static void pe PARAMS ((expressionS *));
1140 static void ps PARAMS ((symbolS *));
1149 fprintf (stdout, "%s: template ", line);
1151 fprintf (stdout, " address: base %s index %s scale %x\n",
1152 x->base_reg ? x->base_reg->reg_name : "none",
1153 x->index_reg ? x->index_reg->reg_name : "none",
1154 x->log2_scale_factor);
1155 fprintf (stdout, " modrm: mode %x reg %x reg/mem %x\n",
1156 x->rm.mode, x->rm.reg, x->rm.regmem);
1157 fprintf (stdout, " sib: base %x index %x scale %x\n",
1158 x->sib.base, x->sib.index, x->sib.scale);
1159 fprintf (stdout, " rex: 64bit %x extX %x extY %x extZ %x\n",
1160 (x->rex & REX_MODE64) != 0,
1161 (x->rex & REX_EXTX) != 0,
1162 (x->rex & REX_EXTY) != 0,
1163 (x->rex & REX_EXTZ) != 0);
1164 for (i = 0; i < x->operands; i++)
1166 fprintf (stdout, " #%d: ", i + 1);
1168 fprintf (stdout, "\n");
1170 & (Reg | SReg2 | SReg3 | Control | Debug | Test | RegMMX | RegXMM))
1171 fprintf (stdout, "%s\n", x->op[i].regs->reg_name);
1172 if (x->types[i] & Imm)
1174 if (x->types[i] & Disp)
1175 pe (x->op[i].disps);
1184 fprintf (stdout, " %d operands ", t->operands);
1185 fprintf (stdout, "opcode %x ", t->base_opcode);
1186 if (t->extension_opcode != None)
1187 fprintf (stdout, "ext %x ", t->extension_opcode);
1188 if (t->opcode_modifier & D)
1189 fprintf (stdout, "D");
1190 if (t->opcode_modifier & W)
1191 fprintf (stdout, "W");
1192 fprintf (stdout, "\n");
1193 for (i = 0; i < t->operands; i++)
1195 fprintf (stdout, " #%d type ", i + 1);
1196 pt (t->operand_types[i]);
1197 fprintf (stdout, "\n");
1205 fprintf (stdout, " operation %d\n", e->X_op);
1206 fprintf (stdout, " add_number %ld (%lx)\n",
1207 (long) e->X_add_number, (long) e->X_add_number);
1208 if (e->X_add_symbol)
1210 fprintf (stdout, " add_symbol ");
1211 ps (e->X_add_symbol);
1212 fprintf (stdout, "\n");
1216 fprintf (stdout, " op_symbol ");
1217 ps (e->X_op_symbol);
1218 fprintf (stdout, "\n");
1226 fprintf (stdout, "%s type %s%s",
1228 S_IS_EXTERNAL (s) ? "EXTERNAL " : "",
1229 segment_name (S_GET_SEGMENT (s)));
1232 static struct type_name
1237 const type_names[] =
1250 { BaseIndex, "BaseIndex" },
1254 { Disp32S, "d32s" },
1256 { InOutPortReg, "InOutPortReg" },
1257 { ShiftCount, "ShiftCount" },
1258 { Control, "control reg" },
1259 { Test, "test reg" },
1260 { Debug, "debug reg" },
1261 { FloatReg, "FReg" },
1262 { FloatAcc, "FAcc" },
1266 { JumpAbsolute, "Jump Absolute" },
1277 const struct type_name *ty;
1279 for (ty = type_names; ty->mask; ty++)
1281 fprintf (stdout, "%s, ", ty->tname);
1285 #endif /* DEBUG386 */
1287 static bfd_reloc_code_real_type
1288 reloc (unsigned int size,
1291 bfd_reloc_code_real_type other)
1293 if (other != NO_RELOC)
1295 reloc_howto_type *reloc;
1300 case BFD_RELOC_X86_64_GOT32:
1301 return BFD_RELOC_X86_64_GOT64;
1303 case BFD_RELOC_X86_64_PLTOFF64:
1304 return BFD_RELOC_X86_64_PLTOFF64;
1306 case BFD_RELOC_X86_64_GOTPC32:
1307 other = BFD_RELOC_X86_64_GOTPC64;
1309 case BFD_RELOC_X86_64_GOTPCREL:
1310 other = BFD_RELOC_X86_64_GOTPCREL64;
1312 case BFD_RELOC_X86_64_TPOFF32:
1313 other = BFD_RELOC_X86_64_TPOFF64;
1315 case BFD_RELOC_X86_64_DTPOFF32:
1316 other = BFD_RELOC_X86_64_DTPOFF64;
1322 /* Sign-checking 4-byte relocations in 16-/32-bit code is pointless. */
1323 if (size == 4 && flag_code != CODE_64BIT)
1326 reloc = bfd_reloc_type_lookup (stdoutput, other);
1328 as_bad (_("unknown relocation (%u)"), other);
1329 else if (size != bfd_get_reloc_size (reloc))
1330 as_bad (_("%u-byte relocation cannot be applied to %u-byte field"),
1331 bfd_get_reloc_size (reloc),
1333 else if (pcrel && !reloc->pc_relative)
1334 as_bad (_("non-pc-relative relocation for pc-relative field"));
1335 else if ((reloc->complain_on_overflow == complain_overflow_signed
1337 || (reloc->complain_on_overflow == complain_overflow_unsigned
1339 as_bad (_("relocated field and relocation type differ in signedness"));
1348 as_bad (_("there are no unsigned pc-relative relocations"));
1351 case 1: return BFD_RELOC_8_PCREL;
1352 case 2: return BFD_RELOC_16_PCREL;
1353 case 4: return BFD_RELOC_32_PCREL;
1354 case 8: return BFD_RELOC_64_PCREL;
1356 as_bad (_("cannot do %u byte pc-relative relocation"), size);
1363 case 4: return BFD_RELOC_X86_64_32S;
1368 case 1: return BFD_RELOC_8;
1369 case 2: return BFD_RELOC_16;
1370 case 4: return BFD_RELOC_32;
1371 case 8: return BFD_RELOC_64;
1373 as_bad (_("cannot do %s %u byte relocation"),
1374 sign > 0 ? "signed" : "unsigned", size);
1378 return BFD_RELOC_NONE;
1381 /* Here we decide which fixups can be adjusted to make them relative to
1382 the beginning of the section instead of the symbol. Basically we need
1383 to make sure that the dynamic relocations are done correctly, so in
1384 some cases we force the original symbol to be used. */
1387 tc_i386_fix_adjustable (fixP)
1388 fixS *fixP ATTRIBUTE_UNUSED;
1390 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
1394 /* Don't adjust pc-relative references to merge sections in 64-bit
1396 if (use_rela_relocations
1397 && (S_GET_SEGMENT (fixP->fx_addsy)->flags & SEC_MERGE) != 0
1401 /* The x86_64 GOTPCREL are represented as 32bit PCrel relocations
1402 and changed later by validate_fix. */
1403 if (GOT_symbol && fixP->fx_subsy == GOT_symbol
1404 && fixP->fx_r_type == BFD_RELOC_32_PCREL)
1407 /* adjust_reloc_syms doesn't know about the GOT. */
1408 if (fixP->fx_r_type == BFD_RELOC_386_GOTOFF
1409 || fixP->fx_r_type == BFD_RELOC_386_PLT32
1410 || fixP->fx_r_type == BFD_RELOC_386_GOT32
1411 || fixP->fx_r_type == BFD_RELOC_386_TLS_GD
1412 || fixP->fx_r_type == BFD_RELOC_386_TLS_LDM
1413 || fixP->fx_r_type == BFD_RELOC_386_TLS_LDO_32
1414 || fixP->fx_r_type == BFD_RELOC_386_TLS_IE_32
1415 || fixP->fx_r_type == BFD_RELOC_386_TLS_IE
1416 || fixP->fx_r_type == BFD_RELOC_386_TLS_GOTIE
1417 || fixP->fx_r_type == BFD_RELOC_386_TLS_LE_32
1418 || fixP->fx_r_type == BFD_RELOC_386_TLS_LE
1419 || fixP->fx_r_type == BFD_RELOC_386_TLS_GOTDESC
1420 || fixP->fx_r_type == BFD_RELOC_386_TLS_DESC_CALL
1421 || fixP->fx_r_type == BFD_RELOC_X86_64_PLT32
1422 || fixP->fx_r_type == BFD_RELOC_X86_64_GOT32
1423 || fixP->fx_r_type == BFD_RELOC_X86_64_GOTPCREL
1424 || fixP->fx_r_type == BFD_RELOC_X86_64_TLSGD
1425 || fixP->fx_r_type == BFD_RELOC_X86_64_TLSLD
1426 || fixP->fx_r_type == BFD_RELOC_X86_64_DTPOFF32
1427 || fixP->fx_r_type == BFD_RELOC_X86_64_DTPOFF64
1428 || fixP->fx_r_type == BFD_RELOC_X86_64_GOTTPOFF
1429 || fixP->fx_r_type == BFD_RELOC_X86_64_TPOFF32
1430 || fixP->fx_r_type == BFD_RELOC_X86_64_TPOFF64
1431 || fixP->fx_r_type == BFD_RELOC_X86_64_GOTOFF64
1432 || fixP->fx_r_type == BFD_RELOC_X86_64_GOTPC32_TLSDESC
1433 || fixP->fx_r_type == BFD_RELOC_X86_64_TLSDESC_CALL
1434 || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
1435 || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
1441 static int intel_float_operand PARAMS ((const char *mnemonic));
1444 intel_float_operand (mnemonic)
1445 const char *mnemonic;
1447 /* Note that the value returned is meaningful only for opcodes with (memory)
1448 operands, hence the code here is free to improperly handle opcodes that
1449 have no operands (for better performance and smaller code). */
1451 if (mnemonic[0] != 'f')
1452 return 0; /* non-math */
1454 switch (mnemonic[1])
1456 /* fclex, fdecstp, fdisi, femms, feni, fincstp, finit, fsetpm, and
1457 the fs segment override prefix not currently handled because no
1458 call path can make opcodes without operands get here */
1460 return 2 /* integer op */;
1462 if (mnemonic[2] == 'd' && (mnemonic[3] == 'c' || mnemonic[3] == 'e'))
1463 return 3; /* fldcw/fldenv */
1466 if (mnemonic[2] != 'o' /* fnop */)
1467 return 3; /* non-waiting control op */
1470 if (mnemonic[2] == 's')
1471 return 3; /* frstor/frstpm */
1474 if (mnemonic[2] == 'a')
1475 return 3; /* fsave */
1476 if (mnemonic[2] == 't')
1478 switch (mnemonic[3])
1480 case 'c': /* fstcw */
1481 case 'd': /* fstdw */
1482 case 'e': /* fstenv */
1483 case 's': /* fsts[gw] */
1489 if (mnemonic[2] == 'r' || mnemonic[2] == 's')
1490 return 0; /* fxsave/fxrstor are not really math ops */
1497 /* This is the guts of the machine-dependent assembler. LINE points to a
1498 machine dependent instruction. This function is supposed to emit
1499 the frags/bytes it assembles to. */
1506 char mnemonic[MAX_MNEM_SIZE];
1508 /* Initialize globals. */
1509 memset (&i, '\0', sizeof (i));
1510 for (j = 0; j < MAX_OPERANDS; j++)
1511 i.reloc[j] = NO_RELOC;
1512 memset (disp_expressions, '\0', sizeof (disp_expressions));
1513 memset (im_expressions, '\0', sizeof (im_expressions));
1514 save_stack_p = save_stack;
1516 /* First parse an instruction mnemonic & call i386_operand for the operands.
1517 We assume that the scrubber has arranged it so that line[0] is the valid
1518 start of a (possibly prefixed) mnemonic. */
1520 line = parse_insn (line, mnemonic);
1524 line = parse_operands (line, mnemonic);
1528 /* Now we've parsed the mnemonic into a set of templates, and have the
1529 operands at hand. */
1531 /* All intel opcodes have reversed operands except for "bound" and
1532 "enter". We also don't reverse intersegment "jmp" and "call"
1533 instructions with 2 immediate operands so that the immediate segment
1534 precedes the offset, as it does when in AT&T mode. "enter" and the
1535 intersegment "jmp" and "call" instructions are the only ones that
1536 have two immediate operands. */
1537 if (intel_syntax && i.operands > 1
1538 && (strcmp (mnemonic, "bound") != 0)
1539 && (strcmp (mnemonic, "invlpga") != 0)
1540 && !((i.types[0] & Imm) && (i.types[1] & Imm)))
1546 /* Don't optimize displacement for movabs since it only takes 64bit
1549 && (flag_code != CODE_64BIT
1550 || strcmp (mnemonic, "movabs") != 0))
1553 /* Next, we find a template that matches the given insn,
1554 making sure the overlap of the given operands types is consistent
1555 with the template operand types. */
1557 if (!match_template ())
1562 /* Undo SYSV386_COMPAT brokenness when in Intel mode. See i386.h */
1564 && (i.tm.base_opcode & 0xfffffde0) == 0xdce0)
1565 i.tm.base_opcode ^= FloatR;
1567 /* Zap movzx and movsx suffix. The suffix may have been set from
1568 "word ptr" or "byte ptr" on the source operand, but we'll use
1569 the suffix later to choose the destination register. */
1570 if ((i.tm.base_opcode & ~9) == 0x0fb6)
1572 if (i.reg_operands < 2
1574 && (~i.tm.opcode_modifier
1581 as_bad (_("ambiguous operand size for `%s'"), i.tm.name);
1587 if (i.tm.opcode_modifier & FWait)
1588 if (!add_prefix (FWAIT_OPCODE))
1591 /* Check string instruction segment overrides. */
1592 if ((i.tm.opcode_modifier & IsString) != 0 && i.mem_operands != 0)
1594 if (!check_string ())
1598 if (!process_suffix ())
1601 /* Make still unresolved immediate matches conform to size of immediate
1602 given in i.suffix. */
1603 if (!finalize_imm ())
1606 if (i.types[0] & Imm1)
1607 i.imm_operands = 0; /* kludge for shift insns. */
1608 if (i.types[0] & ImplicitRegister)
1610 if (i.types[1] & ImplicitRegister)
1612 if (i.types[2] & ImplicitRegister)
1615 if (i.tm.opcode_modifier & ImmExt)
1619 if ((i.tm.cpu_flags & CpuPNI) && i.operands > 0)
1621 /* These Intel Prescott New Instructions have the fixed
1622 operands with an opcode suffix which is coded in the same
1623 place as an 8-bit immediate field would be. Here we check
1624 those operands and remove them afterwards. */
1627 for (x = 0; x < i.operands; x++)
1628 if (i.op[x].regs->reg_num != x)
1629 as_bad (_("can't use register '%%%s' as operand %d in '%s'."),
1630 i.op[x].regs->reg_name, x + 1, i.tm.name);
1634 /* These AMD 3DNow! and Intel Katmai New Instructions have an
1635 opcode suffix which is coded in the same place as an 8-bit
1636 immediate field would be. Here we fake an 8-bit immediate
1637 operand from the opcode suffix stored in tm.extension_opcode. */
1639 assert (i.imm_operands == 0 && i.operands <= 2 && 2 < MAX_OPERANDS);
1641 exp = &im_expressions[i.imm_operands++];
1642 i.op[i.operands].imms = exp;
1643 i.types[i.operands++] = Imm8;
1644 exp->X_op = O_constant;
1645 exp->X_add_number = i.tm.extension_opcode;
1646 i.tm.extension_opcode = None;
1649 /* For insns with operands there are more diddles to do to the opcode. */
1652 if (!process_operands ())
1655 else if (!quiet_warnings && (i.tm.opcode_modifier & Ugh) != 0)
1657 /* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc. */
1658 as_warn (_("translating to `%sp'"), i.tm.name);
1661 /* Handle conversion of 'int $3' --> special int3 insn. */
1662 if (i.tm.base_opcode == INT_OPCODE && i.op[0].imms->X_add_number == 3)
1664 i.tm.base_opcode = INT3_OPCODE;
1668 if ((i.tm.opcode_modifier & (Jump | JumpByte | JumpDword))
1669 && i.op[0].disps->X_op == O_constant)
1671 /* Convert "jmp constant" (and "call constant") to a jump (call) to
1672 the absolute address given by the constant. Since ix86 jumps and
1673 calls are pc relative, we need to generate a reloc. */
1674 i.op[0].disps->X_add_symbol = &abs_symbol;
1675 i.op[0].disps->X_op = O_symbol;
1678 if ((i.tm.opcode_modifier & Rex64) != 0)
1679 i.rex |= REX_MODE64;
1681 /* For 8 bit registers we need an empty rex prefix. Also if the
1682 instruction already has a prefix, we need to convert old
1683 registers to new ones. */
1685 if (((i.types[0] & Reg8) != 0
1686 && (i.op[0].regs->reg_flags & RegRex64) != 0)
1687 || ((i.types[1] & Reg8) != 0
1688 && (i.op[1].regs->reg_flags & RegRex64) != 0)
1689 || (((i.types[0] & Reg8) != 0 || (i.types[1] & Reg8) != 0)
1694 i.rex |= REX_OPCODE;
1695 for (x = 0; x < 2; x++)
1697 /* Look for 8 bit operand that uses old registers. */
1698 if ((i.types[x] & Reg8) != 0
1699 && (i.op[x].regs->reg_flags & RegRex64) == 0)
1701 /* In case it is "hi" register, give up. */
1702 if (i.op[x].regs->reg_num > 3)
1703 as_bad (_("can't encode register '%%%s' in an instruction requiring REX prefix."),
1704 i.op[x].regs->reg_name);
1706 /* Otherwise it is equivalent to the extended register.
1707 Since the encoding doesn't change this is merely
1708 cosmetic cleanup for debug output. */
1710 i.op[x].regs = i.op[x].regs + 8;
1716 add_prefix (REX_OPCODE | i.rex);
1718 /* Record what ISA we have generated so far. */
1719 cpu_arch_isa_flags |= i.tm.cpu_flags;
1721 /* We are ready to output the insn. */
1726 parse_insn (line, mnemonic)
1731 char *token_start = l;
1736 /* Non-zero if we found a prefix only acceptable with string insns. */
1737 const char *expecting_string_instruction = NULL;
1742 while ((*mnem_p = mnemonic_chars[(unsigned char) *l]) != 0)
1745 if (mnem_p >= mnemonic + MAX_MNEM_SIZE)
1747 as_bad (_("no such instruction: `%s'"), token_start);
1752 if (!is_space_char (*l)
1753 && *l != END_OF_INSN
1755 || (*l != PREFIX_SEPARATOR
1758 as_bad (_("invalid character %s in mnemonic"),
1759 output_invalid (*l));
1762 if (token_start == l)
1764 if (!intel_syntax && *l == PREFIX_SEPARATOR)
1765 as_bad (_("expecting prefix; got nothing"));
1767 as_bad (_("expecting mnemonic; got nothing"));
1771 /* Look up instruction (or prefix) via hash table. */
1772 current_templates = hash_find (op_hash, mnemonic);
1774 if (*l != END_OF_INSN
1775 && (!is_space_char (*l) || l[1] != END_OF_INSN)
1776 && current_templates
1777 && (current_templates->start->opcode_modifier & IsPrefix))
1779 if (current_templates->start->cpu_flags
1780 & (flag_code != CODE_64BIT ? Cpu64 : CpuNo64))
1782 as_bad ((flag_code != CODE_64BIT
1783 ? _("`%s' is only supported in 64-bit mode")
1784 : _("`%s' is not supported in 64-bit mode")),
1785 current_templates->start->name);
1788 /* If we are in 16-bit mode, do not allow addr16 or data16.
1789 Similarly, in 32-bit mode, do not allow addr32 or data32. */
1790 if ((current_templates->start->opcode_modifier & (Size16 | Size32))
1791 && flag_code != CODE_64BIT
1792 && (((current_templates->start->opcode_modifier & Size32) != 0)
1793 ^ (flag_code == CODE_16BIT)))
1795 as_bad (_("redundant %s prefix"),
1796 current_templates->start->name);
1799 /* Add prefix, checking for repeated prefixes. */
1800 switch (add_prefix (current_templates->start->base_opcode))
1805 expecting_string_instruction = current_templates->start->name;
1808 /* Skip past PREFIX_SEPARATOR and reset token_start. */
1815 if (!current_templates)
1817 /* See if we can get a match by trimming off a suffix. */
1820 case WORD_MNEM_SUFFIX:
1821 if (intel_syntax && (intel_float_operand (mnemonic) & 2))
1822 i.suffix = SHORT_MNEM_SUFFIX;
1824 case BYTE_MNEM_SUFFIX:
1825 case QWORD_MNEM_SUFFIX:
1826 i.suffix = mnem_p[-1];
1828 current_templates = hash_find (op_hash, mnemonic);
1830 case SHORT_MNEM_SUFFIX:
1831 case LONG_MNEM_SUFFIX:
1834 i.suffix = mnem_p[-1];
1836 current_templates = hash_find (op_hash, mnemonic);
1844 if (intel_float_operand (mnemonic) == 1)
1845 i.suffix = SHORT_MNEM_SUFFIX;
1847 i.suffix = LONG_MNEM_SUFFIX;
1849 current_templates = hash_find (op_hash, mnemonic);
1853 if (!current_templates)
1855 as_bad (_("no such instruction: `%s'"), token_start);
1860 if (current_templates->start->opcode_modifier & (Jump | JumpByte))
1862 /* Check for a branch hint. We allow ",pt" and ",pn" for
1863 predict taken and predict not taken respectively.
1864 I'm not sure that branch hints actually do anything on loop
1865 and jcxz insns (JumpByte) for current Pentium4 chips. They
1866 may work in the future and it doesn't hurt to accept them
1868 if (l[0] == ',' && l[1] == 'p')
1872 if (!add_prefix (DS_PREFIX_OPCODE))
1876 else if (l[2] == 'n')
1878 if (!add_prefix (CS_PREFIX_OPCODE))
1884 /* Any other comma loses. */
1887 as_bad (_("invalid character %s in mnemonic"),
1888 output_invalid (*l));
1892 /* Check if instruction is supported on specified architecture. */
1894 for (t = current_templates->start; t < current_templates->end; ++t)
1896 if (!((t->cpu_flags & ~(Cpu64 | CpuNo64))
1897 & ~(cpu_arch_flags & ~(Cpu64 | CpuNo64))))
1899 if (!(t->cpu_flags & (flag_code == CODE_64BIT ? CpuNo64 : Cpu64)))
1902 if (!(supported & 2))
1904 as_bad (flag_code == CODE_64BIT
1905 ? _("`%s' is not supported in 64-bit mode")
1906 : _("`%s' is only supported in 64-bit mode"),
1907 current_templates->start->name);
1910 if (!(supported & 1))
1912 as_warn (_("`%s' is not supported on `%s%s'"),
1913 current_templates->start->name,
1915 cpu_sub_arch_name ? cpu_sub_arch_name : "");
1917 else if ((Cpu386 & ~cpu_arch_flags) && (flag_code != CODE_16BIT))
1919 as_warn (_("use .code16 to ensure correct addressing mode"));
1922 /* Check for rep/repne without a string instruction. */
1923 if (expecting_string_instruction)
1925 static templates override;
1927 for (t = current_templates->start; t < current_templates->end; ++t)
1928 if (t->opcode_modifier & IsString)
1930 if (t >= current_templates->end)
1932 as_bad (_("expecting string instruction after `%s'"),
1933 expecting_string_instruction);
1936 for (override.start = t; t < current_templates->end; ++t)
1937 if (!(t->opcode_modifier & IsString))
1940 current_templates = &override;
1947 parse_operands (l, mnemonic)
1949 const char *mnemonic;
1953 /* 1 if operand is pending after ','. */
1954 unsigned int expecting_operand = 0;
1956 /* Non-zero if operand parens not balanced. */
1957 unsigned int paren_not_balanced;
1959 while (*l != END_OF_INSN)
1961 /* Skip optional white space before operand. */
1962 if (is_space_char (*l))
1964 if (!is_operand_char (*l) && *l != END_OF_INSN)
1966 as_bad (_("invalid character %s before operand %d"),
1967 output_invalid (*l),
1971 token_start = l; /* after white space */
1972 paren_not_balanced = 0;
1973 while (paren_not_balanced || *l != ',')
1975 if (*l == END_OF_INSN)
1977 if (paren_not_balanced)
1980 as_bad (_("unbalanced parenthesis in operand %d."),
1983 as_bad (_("unbalanced brackets in operand %d."),
1988 break; /* we are done */
1990 else if (!is_operand_char (*l) && !is_space_char (*l))
1992 as_bad (_("invalid character %s in operand %d"),
1993 output_invalid (*l),
2000 ++paren_not_balanced;
2002 --paren_not_balanced;
2007 ++paren_not_balanced;
2009 --paren_not_balanced;
2013 if (l != token_start)
2014 { /* Yes, we've read in another operand. */
2015 unsigned int operand_ok;
2016 this_operand = i.operands++;
2017 if (i.operands > MAX_OPERANDS)
2019 as_bad (_("spurious operands; (%d operands/instruction max)"),
2023 /* Now parse operand adding info to 'i' as we go along. */
2024 END_STRING_AND_SAVE (l);
2028 i386_intel_operand (token_start,
2029 intel_float_operand (mnemonic));
2031 operand_ok = i386_operand (token_start);
2033 RESTORE_END_STRING (l);
2039 if (expecting_operand)
2041 expecting_operand_after_comma:
2042 as_bad (_("expecting operand after ','; got nothing"));
2047 as_bad (_("expecting operand before ','; got nothing"));
2052 /* Now *l must be either ',' or END_OF_INSN. */
2055 if (*++l == END_OF_INSN)
2057 /* Just skip it, if it's \n complain. */
2058 goto expecting_operand_after_comma;
2060 expecting_operand = 1;
2069 union i386_op temp_op;
2070 unsigned int temp_type;
2071 enum bfd_reloc_code_real temp_reloc;
2075 if (i.operands == 2)
2080 else if (i.operands == 3)
2085 temp_type = i.types[xchg2];
2086 i.types[xchg2] = i.types[xchg1];
2087 i.types[xchg1] = temp_type;
2088 temp_op = i.op[xchg2];
2089 i.op[xchg2] = i.op[xchg1];
2090 i.op[xchg1] = temp_op;
2091 temp_reloc = i.reloc[xchg2];
2092 i.reloc[xchg2] = i.reloc[xchg1];
2093 i.reloc[xchg1] = temp_reloc;
2095 if (i.mem_operands == 2)
2097 const seg_entry *temp_seg;
2098 temp_seg = i.seg[0];
2099 i.seg[0] = i.seg[1];
2100 i.seg[1] = temp_seg;
2104 /* Try to ensure constant immediates are represented in the smallest
2109 char guess_suffix = 0;
2113 guess_suffix = i.suffix;
2114 else if (i.reg_operands)
2116 /* Figure out a suffix from the last register operand specified.
2117 We can't do this properly yet, ie. excluding InOutPortReg,
2118 but the following works for instructions with immediates.
2119 In any case, we can't set i.suffix yet. */
2120 for (op = i.operands; --op >= 0;)
2121 if (i.types[op] & Reg)
2123 if (i.types[op] & Reg8)
2124 guess_suffix = BYTE_MNEM_SUFFIX;
2125 else if (i.types[op] & Reg16)
2126 guess_suffix = WORD_MNEM_SUFFIX;
2127 else if (i.types[op] & Reg32)
2128 guess_suffix = LONG_MNEM_SUFFIX;
2129 else if (i.types[op] & Reg64)
2130 guess_suffix = QWORD_MNEM_SUFFIX;
2134 else if ((flag_code == CODE_16BIT) ^ (i.prefix[DATA_PREFIX] != 0))
2135 guess_suffix = WORD_MNEM_SUFFIX;
2137 for (op = i.operands; --op >= 0;)
2138 if (i.types[op] & Imm)
2140 switch (i.op[op].imms->X_op)
2143 /* If a suffix is given, this operand may be shortened. */
2144 switch (guess_suffix)
2146 case LONG_MNEM_SUFFIX:
2147 i.types[op] |= Imm32 | Imm64;
2149 case WORD_MNEM_SUFFIX:
2150 i.types[op] |= Imm16 | Imm32S | Imm32 | Imm64;
2152 case BYTE_MNEM_SUFFIX:
2153 i.types[op] |= Imm16 | Imm8 | Imm8S | Imm32S | Imm32 | Imm64;
2157 /* If this operand is at most 16 bits, convert it
2158 to a signed 16 bit number before trying to see
2159 whether it will fit in an even smaller size.
2160 This allows a 16-bit operand such as $0xffe0 to
2161 be recognised as within Imm8S range. */
2162 if ((i.types[op] & Imm16)
2163 && (i.op[op].imms->X_add_number & ~(offsetT) 0xffff) == 0)
2165 i.op[op].imms->X_add_number =
2166 (((i.op[op].imms->X_add_number & 0xffff) ^ 0x8000) - 0x8000);
2168 if ((i.types[op] & Imm32)
2169 && ((i.op[op].imms->X_add_number & ~(((offsetT) 2 << 31) - 1))
2172 i.op[op].imms->X_add_number = ((i.op[op].imms->X_add_number
2173 ^ ((offsetT) 1 << 31))
2174 - ((offsetT) 1 << 31));
2176 i.types[op] |= smallest_imm_type (i.op[op].imms->X_add_number);
2178 /* We must avoid matching of Imm32 templates when 64bit
2179 only immediate is available. */
2180 if (guess_suffix == QWORD_MNEM_SUFFIX)
2181 i.types[op] &= ~Imm32;
2188 /* Symbols and expressions. */
2190 /* Convert symbolic operand to proper sizes for matching, but don't
2191 prevent matching a set of insns that only supports sizes other
2192 than those matching the insn suffix. */
2194 unsigned int mask, allowed = 0;
2197 for (t = current_templates->start; t < current_templates->end; ++t)
2198 allowed |= t->operand_types[op];
2199 switch (guess_suffix)
2201 case QWORD_MNEM_SUFFIX:
2202 mask = Imm64 | Imm32S;
2204 case LONG_MNEM_SUFFIX:
2207 case WORD_MNEM_SUFFIX:
2210 case BYTE_MNEM_SUFFIX:
2218 i.types[op] &= mask;
2225 /* Try to use the smallest displacement type too. */
2231 for (op = i.operands; --op >= 0;)
2232 if (i.types[op] & Disp)
2234 if (i.op[op].disps->X_op == O_constant)
2236 offsetT disp = i.op[op].disps->X_add_number;
2238 if ((i.types[op] & Disp16)
2239 && (disp & ~(offsetT) 0xffff) == 0)
2241 /* If this operand is at most 16 bits, convert
2242 to a signed 16 bit number and don't use 64bit
2244 disp = (((disp & 0xffff) ^ 0x8000) - 0x8000);
2245 i.types[op] &= ~Disp64;
2247 if ((i.types[op] & Disp32)
2248 && (disp & ~(((offsetT) 2 << 31) - 1)) == 0)
2250 /* If this operand is at most 32 bits, convert
2251 to a signed 32 bit number and don't use 64bit
2253 disp &= (((offsetT) 2 << 31) - 1);
2254 disp = (disp ^ ((offsetT) 1 << 31)) - ((addressT) 1 << 31);
2255 i.types[op] &= ~Disp64;
2257 if (!disp && (i.types[op] & BaseIndex))
2259 i.types[op] &= ~Disp;
2263 else if (flag_code == CODE_64BIT)
2265 if (fits_in_signed_long (disp))
2267 i.types[op] &= ~Disp64;
2268 i.types[op] |= Disp32S;
2270 if (fits_in_unsigned_long (disp))
2271 i.types[op] |= Disp32;
2273 if ((i.types[op] & (Disp32 | Disp32S | Disp16))
2274 && fits_in_signed_byte (disp))
2275 i.types[op] |= Disp8;
2277 else if (i.reloc[op] == BFD_RELOC_386_TLS_DESC_CALL
2278 || i.reloc[op] == BFD_RELOC_X86_64_TLSDESC_CALL)
2280 fix_new_exp (frag_now, frag_more (0) - frag_now->fr_literal, 0,
2281 i.op[op].disps, 0, i.reloc[op]);
2282 i.types[op] &= ~Disp;
2285 /* We only support 64bit displacement on constants. */
2286 i.types[op] &= ~Disp64;
2293 /* Points to template once we've found it. */
2295 unsigned int overlap0, overlap1, overlap2;
2296 unsigned int found_reverse_match;
2299 #define MATCH(overlap, given, template) \
2300 ((overlap & ~JumpAbsolute) \
2301 && (((given) & (BaseIndex | JumpAbsolute)) \
2302 == ((overlap) & (BaseIndex | JumpAbsolute))))
2304 /* If given types r0 and r1 are registers they must be of the same type
2305 unless the expected operand type register overlap is null.
2306 Note that Acc in a template matches every size of reg. */
2307 #define CONSISTENT_REGISTER_MATCH(m0, g0, t0, m1, g1, t1) \
2308 (((g0) & Reg) == 0 || ((g1) & Reg) == 0 \
2309 || ((g0) & Reg) == ((g1) & Reg) \
2310 || ((((m0) & Acc) ? Reg : (t0)) & (((m1) & Acc) ? Reg : (t1)) & Reg) == 0 )
2315 found_reverse_match = 0;
2316 suffix_check = (i.suffix == BYTE_MNEM_SUFFIX
2318 : (i.suffix == WORD_MNEM_SUFFIX
2320 : (i.suffix == SHORT_MNEM_SUFFIX
2322 : (i.suffix == LONG_MNEM_SUFFIX
2324 : (i.suffix == QWORD_MNEM_SUFFIX
2326 : (i.suffix == LONG_DOUBLE_MNEM_SUFFIX
2327 ? No_xSuf : 0))))));
2329 for (t = current_templates->start; t < current_templates->end; t++)
2331 /* Must have right number of operands. */
2332 if (i.operands != t->operands)
2335 /* Check the suffix, except for some instructions in intel mode. */
2336 if ((t->opcode_modifier & suffix_check)
2338 && (t->opcode_modifier & IgnoreSize)))
2341 /* In general, don't allow 64-bit operands in 32-bit mode. */
2342 if (i.suffix == QWORD_MNEM_SUFFIX
2343 && flag_code != CODE_64BIT
2345 ? (!(t->opcode_modifier & IgnoreSize)
2346 && !intel_float_operand (t->name))
2347 : intel_float_operand (t->name) != 2)
2348 && (!(t->operand_types[0] & (RegMMX | RegXMM))
2349 || !(t->operand_types[t->operands > 1] & (RegMMX | RegXMM)))
2350 && (t->base_opcode != 0x0fc7
2351 || t->extension_opcode != 1 /* cmpxchg8b */))
2354 /* Do not verify operands when there are none. */
2355 else if (!t->operands)
2357 if (t->cpu_flags & ~cpu_arch_flags)
2359 /* We've found a match; break out of loop. */
2363 overlap0 = i.types[0] & t->operand_types[0];
2364 switch (t->operands)
2367 if (!MATCH (overlap0, i.types[0], t->operand_types[0]))
2372 overlap1 = i.types[1] & t->operand_types[1];
2373 if (!MATCH (overlap0, i.types[0], t->operand_types[0])
2374 || !MATCH (overlap1, i.types[1], t->operand_types[1])
2375 /* monitor in SSE3 is a very special case. The first
2376 register and the second register may have different
2378 || !((t->base_opcode == 0x0f01
2379 && t->extension_opcode == 0xc8)
2380 || CONSISTENT_REGISTER_MATCH (overlap0, i.types[0],
2381 t->operand_types[0],
2382 overlap1, i.types[1],
2383 t->operand_types[1])))
2385 /* Check if other direction is valid ... */
2386 if ((t->opcode_modifier & (D | FloatD)) == 0)
2389 /* Try reversing direction of operands. */
2390 overlap0 = i.types[0] & t->operand_types[1];
2391 overlap1 = i.types[1] & t->operand_types[0];
2392 if (!MATCH (overlap0, i.types[0], t->operand_types[1])
2393 || !MATCH (overlap1, i.types[1], t->operand_types[0])
2394 || !CONSISTENT_REGISTER_MATCH (overlap0, i.types[0],
2395 t->operand_types[1],
2396 overlap1, i.types[1],
2397 t->operand_types[0]))
2399 /* Does not match either direction. */
2402 /* found_reverse_match holds which of D or FloatDR
2404 found_reverse_match = t->opcode_modifier & (D | FloatDR);
2406 /* Found a forward 2 operand match here. */
2407 else if (t->operands == 3)
2409 /* Here we make use of the fact that there are no
2410 reverse match 3 operand instructions, and all 3
2411 operand instructions only need to be checked for
2412 register consistency between operands 2 and 3. */
2413 overlap2 = i.types[2] & t->operand_types[2];
2414 if (!MATCH (overlap2, i.types[2], t->operand_types[2])
2415 || !CONSISTENT_REGISTER_MATCH (overlap1, i.types[1],
2416 t->operand_types[1],
2417 overlap2, i.types[2],
2418 t->operand_types[2]))
2422 /* Found either forward/reverse 2 or 3 operand match here:
2423 slip through to break. */
2425 if (t->cpu_flags & ~cpu_arch_flags)
2427 found_reverse_match = 0;
2430 /* We've found a match; break out of loop. */
2434 if (t == current_templates->end)
2436 /* We found no match. */
2437 as_bad (_("suffix or operands invalid for `%s'"),
2438 current_templates->start->name);
2442 if (!quiet_warnings)
2445 && ((i.types[0] & JumpAbsolute)
2446 != (t->operand_types[0] & JumpAbsolute)))
2448 as_warn (_("indirect %s without `*'"), t->name);
2451 if ((t->opcode_modifier & (IsPrefix | IgnoreSize))
2452 == (IsPrefix | IgnoreSize))
2454 /* Warn them that a data or address size prefix doesn't
2455 affect assembly of the next line of code. */
2456 as_warn (_("stand-alone `%s' prefix"), t->name);
2460 /* Copy the template we found. */
2462 if (found_reverse_match)
2464 /* If we found a reverse match we must alter the opcode
2465 direction bit. found_reverse_match holds bits to change
2466 (different for int & float insns). */
2468 i.tm.base_opcode ^= found_reverse_match;
2470 i.tm.operand_types[0] = t->operand_types[1];
2471 i.tm.operand_types[1] = t->operand_types[0];
2480 int mem_op = (i.types[0] & AnyMem) ? 0 : 1;
2481 if ((i.tm.operand_types[mem_op] & EsSeg) != 0)
2483 if (i.seg[0] != NULL && i.seg[0] != &es)
2485 as_bad (_("`%s' operand %d must use `%%es' segment"),
2490 /* There's only ever one segment override allowed per instruction.
2491 This instruction possibly has a legal segment override on the
2492 second operand, so copy the segment to where non-string
2493 instructions store it, allowing common code. */
2494 i.seg[0] = i.seg[1];
2496 else if ((i.tm.operand_types[mem_op + 1] & EsSeg) != 0)
2498 if (i.seg[1] != NULL && i.seg[1] != &es)
2500 as_bad (_("`%s' operand %d must use `%%es' segment"),
2510 process_suffix (void)
2512 /* If matched instruction specifies an explicit instruction mnemonic
2514 if (i.tm.opcode_modifier & (Size16 | Size32 | Size64))
2516 if (i.tm.opcode_modifier & Size16)
2517 i.suffix = WORD_MNEM_SUFFIX;
2518 else if (i.tm.opcode_modifier & Size64)
2519 i.suffix = QWORD_MNEM_SUFFIX;
2521 i.suffix = LONG_MNEM_SUFFIX;
2523 else if (i.reg_operands)
2525 /* If there's no instruction mnemonic suffix we try to invent one
2526 based on register operands. */
2529 /* We take i.suffix from the last register operand specified,
2530 Destination register type is more significant than source
2534 for (op = i.operands; --op >= 0;)
2535 if ((i.types[op] & Reg)
2536 && !(i.tm.operand_types[op] & InOutPortReg))
2538 i.suffix = ((i.types[op] & Reg8) ? BYTE_MNEM_SUFFIX :
2539 (i.types[op] & Reg16) ? WORD_MNEM_SUFFIX :
2540 (i.types[op] & Reg64) ? QWORD_MNEM_SUFFIX :
2545 else if (i.suffix == BYTE_MNEM_SUFFIX)
2547 if (!check_byte_reg ())
2550 else if (i.suffix == LONG_MNEM_SUFFIX)
2552 if (!check_long_reg ())
2555 else if (i.suffix == QWORD_MNEM_SUFFIX)
2557 if (!check_qword_reg ())
2560 else if (i.suffix == WORD_MNEM_SUFFIX)
2562 if (!check_word_reg ())
2565 else if (intel_syntax && (i.tm.opcode_modifier & IgnoreSize))
2566 /* Do nothing if the instruction is going to ignore the prefix. */
2571 else if ((i.tm.opcode_modifier & DefaultSize)
2573 /* exclude fldenv/frstor/fsave/fstenv */
2574 && (i.tm.opcode_modifier & No_sSuf))
2576 i.suffix = stackop_size;
2578 else if (intel_syntax
2580 && ((i.tm.operand_types[0] & JumpAbsolute)
2581 || (i.tm.opcode_modifier & (JumpByte|JumpInterSegment))
2582 || (i.tm.base_opcode == 0x0f01 /* [ls][gi]dt */
2583 && i.tm.extension_opcode <= 3)))
2588 if (!(i.tm.opcode_modifier & No_qSuf))
2590 i.suffix = QWORD_MNEM_SUFFIX;
2594 if (!(i.tm.opcode_modifier & No_lSuf))
2595 i.suffix = LONG_MNEM_SUFFIX;
2598 if (!(i.tm.opcode_modifier & No_wSuf))
2599 i.suffix = WORD_MNEM_SUFFIX;
2608 if (i.tm.opcode_modifier & W)
2610 as_bad (_("no instruction mnemonic suffix given and no register operands; can't size instruction"));
2616 unsigned int suffixes = (~i.tm.opcode_modifier
2624 if ((i.tm.opcode_modifier & W)
2625 || ((suffixes & (suffixes - 1))
2626 && !(i.tm.opcode_modifier & (DefaultSize | IgnoreSize))))
2628 as_bad (_("ambiguous operand size for `%s'"), i.tm.name);
2634 /* Change the opcode based on the operand size given by i.suffix;
2635 We don't need to change things for byte insns. */
2637 if (i.suffix && i.suffix != BYTE_MNEM_SUFFIX)
2639 /* It's not a byte, select word/dword operation. */
2640 if (i.tm.opcode_modifier & W)
2642 if (i.tm.opcode_modifier & ShortForm)
2643 i.tm.base_opcode |= 8;
2645 i.tm.base_opcode |= 1;
2648 /* Now select between word & dword operations via the operand
2649 size prefix, except for instructions that will ignore this
2651 if (i.tm.base_opcode == 0x0f01 && i.tm.extension_opcode == 0xc8)
2653 /* monitor in SSE3 is a very special case. The default size
2654 of AX is the size of mode. The address size override
2655 prefix will change the size of AX. */
2656 if (i.op->regs[0].reg_type &
2657 (flag_code == CODE_32BIT ? Reg16 : Reg32))
2658 if (!add_prefix (ADDR_PREFIX_OPCODE))
2661 else if (i.suffix != QWORD_MNEM_SUFFIX
2662 && i.suffix != LONG_DOUBLE_MNEM_SUFFIX
2663 && !(i.tm.opcode_modifier & (IgnoreSize | FloatMF))
2664 && ((i.suffix == LONG_MNEM_SUFFIX) == (flag_code == CODE_16BIT)
2665 || (flag_code == CODE_64BIT
2666 && (i.tm.opcode_modifier & JumpByte))))
2668 unsigned int prefix = DATA_PREFIX_OPCODE;
2670 if (i.tm.opcode_modifier & JumpByte) /* jcxz, loop */
2671 prefix = ADDR_PREFIX_OPCODE;
2673 if (!add_prefix (prefix))
2677 /* Set mode64 for an operand. */
2678 if (i.suffix == QWORD_MNEM_SUFFIX
2679 && flag_code == CODE_64BIT
2680 && (i.tm.opcode_modifier & NoRex64) == 0)
2682 /* Special case for xchg %rax,%rax. It is NOP and doesn't
2685 || i.types [0] != (Acc | Reg64)
2686 || i.types [1] != (Acc | Reg64)
2687 || strcmp (i.tm.name, "xchg") != 0)
2688 i.rex |= REX_MODE64;
2691 /* Size floating point instruction. */
2692 if (i.suffix == LONG_MNEM_SUFFIX)
2693 if (i.tm.opcode_modifier & FloatMF)
2694 i.tm.base_opcode ^= 4;
2701 check_byte_reg (void)
2705 for (op = i.operands; --op >= 0;)
2707 /* If this is an eight bit register, it's OK. If it's the 16 or
2708 32 bit version of an eight bit register, we will just use the
2709 low portion, and that's OK too. */
2710 if (i.types[op] & Reg8)
2713 /* movzx and movsx should not generate this warning. */
2715 && (i.tm.base_opcode == 0xfb7
2716 || i.tm.base_opcode == 0xfb6
2717 || i.tm.base_opcode == 0x63
2718 || i.tm.base_opcode == 0xfbe
2719 || i.tm.base_opcode == 0xfbf))
2722 if ((i.types[op] & WordReg) && i.op[op].regs->reg_num < 4)
2724 /* Prohibit these changes in the 64bit mode, since the
2725 lowering is more complicated. */
2726 if (flag_code == CODE_64BIT
2727 && (i.tm.operand_types[op] & InOutPortReg) == 0)
2729 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
2730 i.op[op].regs->reg_name,
2734 #if REGISTER_WARNINGS
2736 && (i.tm.operand_types[op] & InOutPortReg) == 0)
2737 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
2738 (i.op[op].regs + (i.types[op] & Reg16
2739 ? REGNAM_AL - REGNAM_AX
2740 : REGNAM_AL - REGNAM_EAX))->reg_name,
2741 i.op[op].regs->reg_name,
2746 /* Any other register is bad. */
2747 if (i.types[op] & (Reg | RegMMX | RegXMM
2749 | Control | Debug | Test
2750 | FloatReg | FloatAcc))
2752 as_bad (_("`%%%s' not allowed with `%s%c'"),
2753 i.op[op].regs->reg_name,
2767 for (op = i.operands; --op >= 0;)
2768 /* Reject eight bit registers, except where the template requires
2769 them. (eg. movzb) */
2770 if ((i.types[op] & Reg8) != 0
2771 && (i.tm.operand_types[op] & (Reg16 | Reg32 | Acc)) != 0)
2773 as_bad (_("`%%%s' not allowed with `%s%c'"),
2774 i.op[op].regs->reg_name,
2779 /* Warn if the e prefix on a general reg is missing. */
2780 else if ((!quiet_warnings || flag_code == CODE_64BIT)
2781 && (i.types[op] & Reg16) != 0
2782 && (i.tm.operand_types[op] & (Reg32 | Acc)) != 0)
2784 /* Prohibit these changes in the 64bit mode, since the
2785 lowering is more complicated. */
2786 if (flag_code == CODE_64BIT)
2788 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
2789 i.op[op].regs->reg_name,
2793 #if REGISTER_WARNINGS
2795 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
2796 (i.op[op].regs + REGNAM_EAX - REGNAM_AX)->reg_name,
2797 i.op[op].regs->reg_name,
2801 /* Warn if the r prefix on a general reg is missing. */
2802 else if ((i.types[op] & Reg64) != 0
2803 && (i.tm.operand_types[op] & (Reg32 | Acc)) != 0)
2805 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
2806 i.op[op].regs->reg_name,
2818 for (op = i.operands; --op >= 0; )
2819 /* Reject eight bit registers, except where the template requires
2820 them. (eg. movzb) */
2821 if ((i.types[op] & Reg8) != 0
2822 && (i.tm.operand_types[op] & (Reg16 | Reg32 | Acc)) != 0)
2824 as_bad (_("`%%%s' not allowed with `%s%c'"),
2825 i.op[op].regs->reg_name,
2830 /* Warn if the e prefix on a general reg is missing. */
2831 else if (((i.types[op] & Reg16) != 0
2832 || (i.types[op] & Reg32) != 0)
2833 && (i.tm.operand_types[op] & (Reg32 | Acc)) != 0)
2835 /* Prohibit these changes in the 64bit mode, since the
2836 lowering is more complicated. */
2837 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
2838 i.op[op].regs->reg_name,
2849 for (op = i.operands; --op >= 0;)
2850 /* Reject eight bit registers, except where the template requires
2851 them. (eg. movzb) */
2852 if ((i.types[op] & Reg8) != 0
2853 && (i.tm.operand_types[op] & (Reg16 | Reg32 | Acc)) != 0)
2855 as_bad (_("`%%%s' not allowed with `%s%c'"),
2856 i.op[op].regs->reg_name,
2861 /* Warn if the e prefix on a general reg is present. */
2862 else if ((!quiet_warnings || flag_code == CODE_64BIT)
2863 && (i.types[op] & Reg32) != 0
2864 && (i.tm.operand_types[op] & (Reg16 | Acc)) != 0)
2866 /* Prohibit these changes in the 64bit mode, since the
2867 lowering is more complicated. */
2868 if (flag_code == CODE_64BIT)
2870 as_bad (_("Incorrect register `%%%s' used with `%c' suffix"),
2871 i.op[op].regs->reg_name,
2876 #if REGISTER_WARNINGS
2877 as_warn (_("using `%%%s' instead of `%%%s' due to `%c' suffix"),
2878 (i.op[op].regs + REGNAM_AX - REGNAM_EAX)->reg_name,
2879 i.op[op].regs->reg_name,
2889 unsigned int overlap0, overlap1, overlap2;
2891 overlap0 = i.types[0] & i.tm.operand_types[0];
2892 if ((overlap0 & (Imm8 | Imm8S | Imm16 | Imm32 | Imm32S | Imm64))
2893 && overlap0 != Imm8 && overlap0 != Imm8S
2894 && overlap0 != Imm16 && overlap0 != Imm32S
2895 && overlap0 != Imm32 && overlap0 != Imm64)
2899 overlap0 &= (i.suffix == BYTE_MNEM_SUFFIX
2901 : (i.suffix == WORD_MNEM_SUFFIX
2903 : (i.suffix == QWORD_MNEM_SUFFIX
2907 else if (overlap0 == (Imm16 | Imm32S | Imm32)
2908 || overlap0 == (Imm16 | Imm32)
2909 || overlap0 == (Imm16 | Imm32S))
2911 overlap0 = ((flag_code == CODE_16BIT) ^ (i.prefix[DATA_PREFIX] != 0)
2914 if (overlap0 != Imm8 && overlap0 != Imm8S
2915 && overlap0 != Imm16 && overlap0 != Imm32S
2916 && overlap0 != Imm32 && overlap0 != Imm64)
2918 as_bad (_("no instruction mnemonic suffix given; can't determine immediate size"));
2922 i.types[0] = overlap0;
2924 overlap1 = i.types[1] & i.tm.operand_types[1];
2925 if ((overlap1 & (Imm8 | Imm8S | Imm16 | Imm32S | Imm32 | Imm64))
2926 && overlap1 != Imm8 && overlap1 != Imm8S
2927 && overlap1 != Imm16 && overlap1 != Imm32S
2928 && overlap1 != Imm32 && overlap1 != Imm64)
2932 overlap1 &= (i.suffix == BYTE_MNEM_SUFFIX
2934 : (i.suffix == WORD_MNEM_SUFFIX
2936 : (i.suffix == QWORD_MNEM_SUFFIX
2940 else if (overlap1 == (Imm16 | Imm32 | Imm32S)
2941 || overlap1 == (Imm16 | Imm32)
2942 || overlap1 == (Imm16 | Imm32S))
2944 overlap1 = ((flag_code == CODE_16BIT) ^ (i.prefix[DATA_PREFIX] != 0)
2947 if (overlap1 != Imm8 && overlap1 != Imm8S
2948 && overlap1 != Imm16 && overlap1 != Imm32S
2949 && overlap1 != Imm32 && overlap1 != Imm64)
2951 as_bad (_("no instruction mnemonic suffix given; can't determine immediate size %x %c"),overlap1, i.suffix);
2955 i.types[1] = overlap1;
2957 overlap2 = i.types[2] & i.tm.operand_types[2];
2958 assert ((overlap2 & Imm) == 0);
2959 i.types[2] = overlap2;
2967 /* Default segment register this instruction will use for memory
2968 accesses. 0 means unknown. This is only for optimizing out
2969 unnecessary segment overrides. */
2970 const seg_entry *default_seg = 0;
2972 /* The imul $imm, %reg instruction is converted into
2973 imul $imm, %reg, %reg, and the clr %reg instruction
2974 is converted into xor %reg, %reg. */
2975 if (i.tm.opcode_modifier & regKludge)
2977 unsigned int first_reg_op = (i.types[0] & Reg) ? 0 : 1;
2978 /* Pretend we saw the extra register operand. */
2979 assert (i.op[first_reg_op + 1].regs == 0);
2980 i.op[first_reg_op + 1].regs = i.op[first_reg_op].regs;
2981 i.types[first_reg_op + 1] = i.types[first_reg_op];
2985 if (i.tm.opcode_modifier & ShortForm)
2987 /* The register or float register operand is in operand 0 or 1. */
2988 unsigned int op = (i.types[0] & (Reg | FloatReg)) ? 0 : 1;
2989 /* Register goes in low 3 bits of opcode. */
2990 i.tm.base_opcode |= i.op[op].regs->reg_num;
2991 if ((i.op[op].regs->reg_flags & RegRex) != 0)
2993 if (!quiet_warnings && (i.tm.opcode_modifier & Ugh) != 0)
2995 /* Warn about some common errors, but press on regardless.
2996 The first case can be generated by gcc (<= 2.8.1). */
2997 if (i.operands == 2)
2999 /* Reversed arguments on faddp, fsubp, etc. */
3000 as_warn (_("translating to `%s %%%s,%%%s'"), i.tm.name,
3001 i.op[1].regs->reg_name,
3002 i.op[0].regs->reg_name);
3006 /* Extraneous `l' suffix on fp insn. */
3007 as_warn (_("translating to `%s %%%s'"), i.tm.name,
3008 i.op[0].regs->reg_name);
3012 else if (i.tm.opcode_modifier & Modrm)
3014 /* The opcode is completed (modulo i.tm.extension_opcode which
3015 must be put into the modrm byte). Now, we make the modrm and
3016 index base bytes based on all the info we've collected. */
3018 default_seg = build_modrm_byte ();
3020 else if (i.tm.opcode_modifier & (Seg2ShortForm | Seg3ShortForm))
3022 if (i.tm.base_opcode == POP_SEG_SHORT
3023 && i.op[0].regs->reg_num == 1)
3025 as_bad (_("you can't `pop %%cs'"));
3028 i.tm.base_opcode |= (i.op[0].regs->reg_num << 3);
3029 if ((i.op[0].regs->reg_flags & RegRex) != 0)
3032 else if ((i.tm.base_opcode & ~(D | W)) == MOV_AX_DISP32)
3036 else if ((i.tm.opcode_modifier & IsString) != 0)
3038 /* For the string instructions that allow a segment override
3039 on one of their operands, the default segment is ds. */
3043 if ((i.tm.base_opcode == 0x8d /* lea */
3044 || (i.tm.cpu_flags & CpuSVME))
3045 && i.seg[0] && !quiet_warnings)
3046 as_warn (_("segment override on `%s' is ineffectual"), i.tm.name);
3048 /* If a segment was explicitly specified, and the specified segment
3049 is not the default, use an opcode prefix to select it. If we
3050 never figured out what the default segment is, then default_seg
3051 will be zero at this point, and the specified segment prefix will
3053 if ((i.seg[0]) && (i.seg[0] != default_seg))
3055 if (!add_prefix (i.seg[0]->seg_prefix))
3061 static const seg_entry *
3064 const seg_entry *default_seg = 0;
3066 /* i.reg_operands MUST be the number of real register operands;
3067 implicit registers do not count. */
3068 if (i.reg_operands == 2)
3070 unsigned int source, dest;
3071 source = ((i.types[0]
3072 & (Reg | RegMMX | RegXMM
3074 | Control | Debug | Test))
3079 /* One of the register operands will be encoded in the i.tm.reg
3080 field, the other in the combined i.tm.mode and i.tm.regmem
3081 fields. If no form of this instruction supports a memory
3082 destination operand, then we assume the source operand may
3083 sometimes be a memory operand and so we need to store the
3084 destination in the i.rm.reg field. */
3085 if ((i.tm.operand_types[dest] & AnyMem) == 0)
3087 i.rm.reg = i.op[dest].regs->reg_num;
3088 i.rm.regmem = i.op[source].regs->reg_num;
3089 if ((i.op[dest].regs->reg_flags & RegRex) != 0)
3091 if ((i.op[source].regs->reg_flags & RegRex) != 0)
3096 i.rm.reg = i.op[source].regs->reg_num;
3097 i.rm.regmem = i.op[dest].regs->reg_num;
3098 if ((i.op[dest].regs->reg_flags & RegRex) != 0)
3100 if ((i.op[source].regs->reg_flags & RegRex) != 0)
3103 if (flag_code != CODE_64BIT && (i.rex & (REX_EXTX | REX_EXTZ)))
3105 if (!((i.types[0] | i.types[1]) & Control))
3107 i.rex &= ~(REX_EXTX | REX_EXTZ);
3108 add_prefix (LOCK_PREFIX_OPCODE);
3112 { /* If it's not 2 reg operands... */
3115 unsigned int fake_zero_displacement = 0;
3116 unsigned int op = ((i.types[0] & AnyMem)
3118 : (i.types[1] & AnyMem) ? 1 : 2);
3122 if (i.base_reg == 0)
3125 if (!i.disp_operands)
3126 fake_zero_displacement = 1;
3127 if (i.index_reg == 0)
3129 /* Operand is just <disp> */
3130 if (flag_code == CODE_64BIT)
3132 /* 64bit mode overwrites the 32bit absolute
3133 addressing by RIP relative addressing and
3134 absolute addressing is encoded by one of the
3135 redundant SIB forms. */
3136 i.rm.regmem = ESCAPE_TO_TWO_BYTE_ADDRESSING;
3137 i.sib.base = NO_BASE_REGISTER;
3138 i.sib.index = NO_INDEX_REGISTER;
3139 i.types[op] = ((i.prefix[ADDR_PREFIX] == 0) ? Disp32S : Disp32);
3141 else if ((flag_code == CODE_16BIT) ^ (i.prefix[ADDR_PREFIX] != 0))
3143 i.rm.regmem = NO_BASE_REGISTER_16;
3144 i.types[op] = Disp16;
3148 i.rm.regmem = NO_BASE_REGISTER;
3149 i.types[op] = Disp32;
3152 else /* !i.base_reg && i.index_reg */
3154 i.sib.index = i.index_reg->reg_num;
3155 i.sib.base = NO_BASE_REGISTER;
3156 i.sib.scale = i.log2_scale_factor;
3157 i.rm.regmem = ESCAPE_TO_TWO_BYTE_ADDRESSING;
3158 i.types[op] &= ~Disp;
3159 if (flag_code != CODE_64BIT)
3160 i.types[op] |= Disp32; /* Must be 32 bit */
3162 i.types[op] |= Disp32S;
3163 if ((i.index_reg->reg_flags & RegRex) != 0)
3167 /* RIP addressing for 64bit mode. */
3168 else if (i.base_reg->reg_type == BaseIndex)
3170 i.rm.regmem = NO_BASE_REGISTER;
3171 i.types[op] &= ~ Disp;
3172 i.types[op] |= Disp32S;
3173 i.flags[op] = Operand_PCrel;
3174 if (! i.disp_operands)
3175 fake_zero_displacement = 1;
3177 else if (i.base_reg->reg_type & Reg16)
3179 switch (i.base_reg->reg_num)
3182 if (i.index_reg == 0)
3184 else /* (%bx,%si) -> 0, or (%bx,%di) -> 1 */
3185 i.rm.regmem = i.index_reg->reg_num - 6;
3189 if (i.index_reg == 0)
3192 if ((i.types[op] & Disp) == 0)
3194 /* fake (%bp) into 0(%bp) */
3195 i.types[op] |= Disp8;
3196 fake_zero_displacement = 1;
3199 else /* (%bp,%si) -> 2, or (%bp,%di) -> 3 */
3200 i.rm.regmem = i.index_reg->reg_num - 6 + 2;
3202 default: /* (%si) -> 4 or (%di) -> 5 */
3203 i.rm.regmem = i.base_reg->reg_num - 6 + 4;
3205 i.rm.mode = mode_from_disp_size (i.types[op]);
3207 else /* i.base_reg and 32/64 bit mode */
3209 if (flag_code == CODE_64BIT
3210 && (i.types[op] & Disp))
3211 i.types[op] = (i.types[op] & Disp8) | (i.prefix[ADDR_PREFIX] == 0 ? Disp32S : Disp32);
3213 i.rm.regmem = i.base_reg->reg_num;
3214 if ((i.base_reg->reg_flags & RegRex) != 0)
3216 i.sib.base = i.base_reg->reg_num;
3217 /* x86-64 ignores REX prefix bit here to avoid decoder
3219 if ((i.base_reg->reg_num & 7) == EBP_REG_NUM)
3222 if (i.disp_operands == 0)
3224 fake_zero_displacement = 1;
3225 i.types[op] |= Disp8;
3228 else if (i.base_reg->reg_num == ESP_REG_NUM)
3232 i.sib.scale = i.log2_scale_factor;
3233 if (i.index_reg == 0)
3235 /* <disp>(%esp) becomes two byte modrm with no index
3236 register. We've already stored the code for esp
3237 in i.rm.regmem ie. ESCAPE_TO_TWO_BYTE_ADDRESSING.
3238 Any base register besides %esp will not use the
3239 extra modrm byte. */
3240 i.sib.index = NO_INDEX_REGISTER;
3241 #if !SCALE1_WHEN_NO_INDEX
3242 /* Another case where we force the second modrm byte. */
3243 if (i.log2_scale_factor)
3244 i.rm.regmem = ESCAPE_TO_TWO_BYTE_ADDRESSING;
3249 i.sib.index = i.index_reg->reg_num;
3250 i.rm.regmem = ESCAPE_TO_TWO_BYTE_ADDRESSING;
3251 if ((i.index_reg->reg_flags & RegRex) != 0)
3256 && (i.reloc[op] == BFD_RELOC_386_TLS_DESC_CALL
3257 || i.reloc[op] == BFD_RELOC_X86_64_TLSDESC_CALL))
3260 i.rm.mode = mode_from_disp_size (i.types[op]);
3263 if (fake_zero_displacement)
3265 /* Fakes a zero displacement assuming that i.types[op]
3266 holds the correct displacement size. */
3269 assert (i.op[op].disps == 0);
3270 exp = &disp_expressions[i.disp_operands++];
3271 i.op[op].disps = exp;
3272 exp->X_op = O_constant;
3273 exp->X_add_number = 0;
3274 exp->X_add_symbol = (symbolS *) 0;
3275 exp->X_op_symbol = (symbolS *) 0;
3279 /* Fill in i.rm.reg or i.rm.regmem field with register operand
3280 (if any) based on i.tm.extension_opcode. Again, we must be
3281 careful to make sure that segment/control/debug/test/MMX
3282 registers are coded into the i.rm.reg field. */
3287 & (Reg | RegMMX | RegXMM
3289 | Control | Debug | Test))
3292 & (Reg | RegMMX | RegXMM
3294 | Control | Debug | Test))
3297 /* If there is an extension opcode to put here, the register
3298 number must be put into the regmem field. */
3299 if (i.tm.extension_opcode != None)
3301 i.rm.regmem = i.op[op].regs->reg_num;
3302 if ((i.op[op].regs->reg_flags & RegRex) != 0)
3307 i.rm.reg = i.op[op].regs->reg_num;
3308 if ((i.op[op].regs->reg_flags & RegRex) != 0)
3312 /* Now, if no memory operand has set i.rm.mode = 0, 1, 2 we
3313 must set it to 3 to indicate this is a register operand
3314 in the regmem field. */
3315 if (!i.mem_operands)
3319 /* Fill in i.rm.reg field with extension opcode (if any). */
3320 if (i.tm.extension_opcode != None)
3321 i.rm.reg = i.tm.extension_opcode;
3332 relax_substateT subtype;
3337 if (flag_code == CODE_16BIT)
3341 if (i.prefix[DATA_PREFIX] != 0)
3347 /* Pentium4 branch hints. */
3348 if (i.prefix[SEG_PREFIX] == CS_PREFIX_OPCODE /* not taken */
3349 || i.prefix[SEG_PREFIX] == DS_PREFIX_OPCODE /* taken */)
3354 if (i.prefix[REX_PREFIX] != 0)
3360 if (i.prefixes != 0 && !intel_syntax)
3361 as_warn (_("skipping prefixes on this instruction"));
3363 /* It's always a symbol; End frag & setup for relax.
3364 Make sure there is enough room in this frag for the largest
3365 instruction we may generate in md_convert_frag. This is 2
3366 bytes for the opcode and room for the prefix and largest
3368 frag_grow (prefix + 2 + 4);
3369 /* Prefix and 1 opcode byte go in fr_fix. */
3370 p = frag_more (prefix + 1);
3371 if (i.prefix[DATA_PREFIX] != 0)
3372 *p++ = DATA_PREFIX_OPCODE;
3373 if (i.prefix[SEG_PREFIX] == CS_PREFIX_OPCODE
3374 || i.prefix[SEG_PREFIX] == DS_PREFIX_OPCODE)
3375 *p++ = i.prefix[SEG_PREFIX];
3376 if (i.prefix[REX_PREFIX] != 0)
3377 *p++ = i.prefix[REX_PREFIX];
3378 *p = i.tm.base_opcode;
3380 if ((unsigned char) *p == JUMP_PC_RELATIVE)
3381 subtype = ENCODE_RELAX_STATE (UNCOND_JUMP, SMALL);
3382 else if ((cpu_arch_flags & Cpu386) != 0)
3383 subtype = ENCODE_RELAX_STATE (COND_JUMP, SMALL);
3385 subtype = ENCODE_RELAX_STATE (COND_JUMP86, SMALL);
3388 sym = i.op[0].disps->X_add_symbol;
3389 off = i.op[0].disps->X_add_number;
3391 if (i.op[0].disps->X_op != O_constant
3392 && i.op[0].disps->X_op != O_symbol)
3394 /* Handle complex expressions. */
3395 sym = make_expr_symbol (i.op[0].disps);
3399 /* 1 possible extra opcode + 4 byte displacement go in var part.
3400 Pass reloc in fr_var. */
3401 frag_var (rs_machine_dependent, 5, i.reloc[0], subtype, sym, off, p);
3411 if (i.tm.opcode_modifier & JumpByte)
3413 /* This is a loop or jecxz type instruction. */
3415 if (i.prefix[ADDR_PREFIX] != 0)
3417 FRAG_APPEND_1_CHAR (ADDR_PREFIX_OPCODE);
3420 /* Pentium4 branch hints. */
3421 if (i.prefix[SEG_PREFIX] == CS_PREFIX_OPCODE /* not taken */
3422 || i.prefix[SEG_PREFIX] == DS_PREFIX_OPCODE /* taken */)
3424 FRAG_APPEND_1_CHAR (i.prefix[SEG_PREFIX]);
3433 if (flag_code == CODE_16BIT)
3436 if (i.prefix[DATA_PREFIX] != 0)
3438 FRAG_APPEND_1_CHAR (DATA_PREFIX_OPCODE);
3448 if (i.prefix[REX_PREFIX] != 0)
3450 FRAG_APPEND_1_CHAR (i.prefix[REX_PREFIX]);
3454 if (i.prefixes != 0 && !intel_syntax)
3455 as_warn (_("skipping prefixes on this instruction"));
3457 p = frag_more (1 + size);
3458 *p++ = i.tm.base_opcode;
3460 fixP = fix_new_exp (frag_now, p - frag_now->fr_literal, size,
3461 i.op[0].disps, 1, reloc (size, 1, 1, i.reloc[0]));
3463 /* All jumps handled here are signed, but don't use a signed limit
3464 check for 32 and 16 bit jumps as we want to allow wrap around at
3465 4G and 64k respectively. */
3467 fixP->fx_signed = 1;
3471 output_interseg_jump ()
3479 if (flag_code == CODE_16BIT)
3483 if (i.prefix[DATA_PREFIX] != 0)
3489 if (i.prefix[REX_PREFIX] != 0)
3499 if (i.prefixes != 0 && !intel_syntax)
3500 as_warn (_("skipping prefixes on this instruction"));
3502 /* 1 opcode; 2 segment; offset */
3503 p = frag_more (prefix + 1 + 2 + size);
3505 if (i.prefix[DATA_PREFIX] != 0)
3506 *p++ = DATA_PREFIX_OPCODE;
3508 if (i.prefix[REX_PREFIX] != 0)
3509 *p++ = i.prefix[REX_PREFIX];
3511 *p++ = i.tm.base_opcode;
3512 if (i.op[1].imms->X_op == O_constant)
3514 offsetT n = i.op[1].imms->X_add_number;
3517 && !fits_in_unsigned_word (n)
3518 && !fits_in_signed_word (n))
3520 as_bad (_("16-bit jump out of range"));
3523 md_number_to_chars (p, n, size);
3526 fix_new_exp (frag_now, p - frag_now->fr_literal, size,
3527 i.op[1].imms, 0, reloc (size, 0, 0, i.reloc[1]));
3528 if (i.op[0].imms->X_op != O_constant)
3529 as_bad (_("can't handle non absolute segment in `%s'"),
3531 md_number_to_chars (p + size, (valueT) i.op[0].imms->X_add_number, 2);
3537 fragS *insn_start_frag;
3538 offsetT insn_start_off;
3540 /* Tie dwarf2 debug info to the address at the start of the insn.
3541 We can't do this after the insn has been output as the current
3542 frag may have been closed off. eg. by frag_var. */
3543 dwarf2_emit_insn (0);
3545 insn_start_frag = frag_now;
3546 insn_start_off = frag_now_fix ();
3549 if (i.tm.opcode_modifier & Jump)
3551 else if (i.tm.opcode_modifier & (JumpByte | JumpDword))
3553 else if (i.tm.opcode_modifier & JumpInterSegment)
3554 output_interseg_jump ();
3557 /* Output normal instructions here. */
3560 unsigned int prefix;
3562 /* All opcodes on i386 have either 1 or 2 bytes. Merom New
3563 Instructions have 3 bytes. We may use one more higher byte
3564 to specify a prefix the instruction requires. */
3565 if ((i.tm.cpu_flags & CpuMNI) != 0)
3567 if (i.tm.base_opcode & 0xff000000)
3569 prefix = (i.tm.base_opcode >> 24) & 0xff;
3573 else if ((i.tm.base_opcode & 0xff0000) != 0)
3575 prefix = (i.tm.base_opcode >> 16) & 0xff;
3576 if ((i.tm.cpu_flags & CpuPadLock) != 0)
3579 if (prefix != REPE_PREFIX_OPCODE
3580 || i.prefix[LOCKREP_PREFIX] != REPE_PREFIX_OPCODE)
3581 add_prefix (prefix);
3584 add_prefix (prefix);
3587 /* The prefix bytes. */
3589 q < i.prefix + sizeof (i.prefix) / sizeof (i.prefix[0]);
3595 md_number_to_chars (p, (valueT) *q, 1);
3599 /* Now the opcode; be careful about word order here! */
3600 if (fits_in_unsigned_byte (i.tm.base_opcode))
3602 FRAG_APPEND_1_CHAR (i.tm.base_opcode);
3606 if ((i.tm.cpu_flags & CpuMNI) != 0)
3609 *p++ = (i.tm.base_opcode >> 16) & 0xff;
3614 /* Put out high byte first: can't use md_number_to_chars! */
3615 *p++ = (i.tm.base_opcode >> 8) & 0xff;
3616 *p = i.tm.base_opcode & 0xff;
3619 /* Now the modrm byte and sib byte (if present). */
3620 if (i.tm.opcode_modifier & Modrm)
3623 md_number_to_chars (p,
3624 (valueT) (i.rm.regmem << 0
3628 /* If i.rm.regmem == ESP (4)
3629 && i.rm.mode != (Register mode)
3631 ==> need second modrm byte. */
3632 if (i.rm.regmem == ESCAPE_TO_TWO_BYTE_ADDRESSING
3634 && !(i.base_reg && (i.base_reg->reg_type & Reg16) != 0))
3637 md_number_to_chars (p,
3638 (valueT) (i.sib.base << 0
3640 | i.sib.scale << 6),
3645 if (i.disp_operands)
3646 output_disp (insn_start_frag, insn_start_off);
3649 output_imm (insn_start_frag, insn_start_off);
3655 pi ("" /*line*/, &i);
3657 #endif /* DEBUG386 */
3661 output_disp (fragS *insn_start_frag, offsetT insn_start_off)
3666 for (n = 0; n < i.operands; n++)
3668 if (i.types[n] & Disp)
3670 if (i.op[n].disps->X_op == O_constant)
3676 if (i.types[n] & (Disp8 | Disp16 | Disp64))
3679 if (i.types[n] & Disp8)
3681 if (i.types[n] & Disp64)
3684 val = offset_in_range (i.op[n].disps->X_add_number,
3686 p = frag_more (size);
3687 md_number_to_chars (p, val, size);
3691 enum bfd_reloc_code_real reloc_type;
3694 int pcrel = (i.flags[n] & Operand_PCrel) != 0;
3696 /* The PC relative address is computed relative
3697 to the instruction boundary, so in case immediate
3698 fields follows, we need to adjust the value. */
3699 if (pcrel && i.imm_operands)
3704 for (n1 = 0; n1 < i.operands; n1++)
3705 if (i.types[n1] & Imm)
3707 if (i.types[n1] & (Imm8 | Imm8S | Imm16 | Imm64))
3710 if (i.types[n1] & (Imm8 | Imm8S))
3712 if (i.types[n1] & Imm64)
3717 /* We should find the immediate. */
3718 if (n1 == i.operands)
3720 i.op[n].disps->X_add_number -= imm_size;
3723 if (i.types[n] & Disp32S)
3726 if (i.types[n] & (Disp16 | Disp64))
3729 if (i.types[n] & Disp64)
3733 p = frag_more (size);
3734 reloc_type = reloc (size, pcrel, sign, i.reloc[n]);
3736 && GOT_symbol == i.op[n].disps->X_add_symbol
3737 && (((reloc_type == BFD_RELOC_32
3738 || reloc_type == BFD_RELOC_X86_64_32S
3739 || (reloc_type == BFD_RELOC_64
3741 && (i.op[n].disps->X_op == O_symbol
3742 || (i.op[n].disps->X_op == O_add
3743 && ((symbol_get_value_expression
3744 (i.op[n].disps->X_op_symbol)->X_op)
3746 || reloc_type == BFD_RELOC_32_PCREL))
3750 if (insn_start_frag == frag_now)
3751 add = (p - frag_now->fr_literal) - insn_start_off;
3756 add = insn_start_frag->fr_fix - insn_start_off;
3757 for (fr = insn_start_frag->fr_next;
3758 fr && fr != frag_now; fr = fr->fr_next)
3760 add += p - frag_now->fr_literal;
3765 reloc_type = BFD_RELOC_386_GOTPC;
3766 i.op[n].imms->X_add_number += add;
3768 else if (reloc_type == BFD_RELOC_64)
3769 reloc_type = BFD_RELOC_X86_64_GOTPC64;
3771 /* Don't do the adjustment for x86-64, as there
3772 the pcrel addressing is relative to the _next_
3773 insn, and that is taken care of in other code. */
3774 reloc_type = BFD_RELOC_X86_64_GOTPC32;
3776 fix_new_exp (frag_now, p - frag_now->fr_literal, size,
3777 i.op[n].disps, pcrel, reloc_type);
3784 output_imm (fragS *insn_start_frag, offsetT insn_start_off)
3789 for (n = 0; n < i.operands; n++)
3791 if (i.types[n] & Imm)
3793 if (i.op[n].imms->X_op == O_constant)
3799 if (i.types[n] & (Imm8 | Imm8S | Imm16 | Imm64))
3802 if (i.types[n] & (Imm8 | Imm8S))
3804 else if (i.types[n] & Imm64)
3807 val = offset_in_range (i.op[n].imms->X_add_number,
3809 p = frag_more (size);
3810 md_number_to_chars (p, val, size);
3814 /* Not absolute_section.
3815 Need a 32-bit fixup (don't support 8bit
3816 non-absolute imms). Try to support other
3818 enum bfd_reloc_code_real reloc_type;
3822 if ((i.types[n] & (Imm32S))
3823 && (i.suffix == QWORD_MNEM_SUFFIX
3824 || (!i.suffix && (i.tm.opcode_modifier & No_lSuf))))
3826 if (i.types[n] & (Imm8 | Imm8S | Imm16 | Imm64))
3829 if (i.types[n] & (Imm8 | Imm8S))
3831 if (i.types[n] & Imm64)
3835 p = frag_more (size);
3836 reloc_type = reloc (size, 0, sign, i.reloc[n]);
3838 /* This is tough to explain. We end up with this one if we
3839 * have operands that look like
3840 * "_GLOBAL_OFFSET_TABLE_+[.-.L284]". The goal here is to
3841 * obtain the absolute address of the GOT, and it is strongly
3842 * preferable from a performance point of view to avoid using
3843 * a runtime relocation for this. The actual sequence of
3844 * instructions often look something like:
3849 * addl $_GLOBAL_OFFSET_TABLE_+[.-.L66],%ebx
3851 * The call and pop essentially return the absolute address
3852 * of the label .L66 and store it in %ebx. The linker itself
3853 * will ultimately change the first operand of the addl so
3854 * that %ebx points to the GOT, but to keep things simple, the
3855 * .o file must have this operand set so that it generates not
3856 * the absolute address of .L66, but the absolute address of
3857 * itself. This allows the linker itself simply treat a GOTPC
3858 * relocation as asking for a pcrel offset to the GOT to be
3859 * added in, and the addend of the relocation is stored in the
3860 * operand field for the instruction itself.
3862 * Our job here is to fix the operand so that it would add
3863 * the correct offset so that %ebx would point to itself. The
3864 * thing that is tricky is that .-.L66 will point to the
3865 * beginning of the instruction, so we need to further modify
3866 * the operand so that it will point to itself. There are
3867 * other cases where you have something like:
3869 * .long $_GLOBAL_OFFSET_TABLE_+[.-.L66]
3871 * and here no correction would be required. Internally in
3872 * the assembler we treat operands of this form as not being
3873 * pcrel since the '.' is explicitly mentioned, and I wonder
3874 * whether it would simplify matters to do it this way. Who
3875 * knows. In earlier versions of the PIC patches, the
3876 * pcrel_adjust field was used to store the correction, but
3877 * since the expression is not pcrel, I felt it would be
3878 * confusing to do it this way. */
3880 if ((reloc_type == BFD_RELOC_32
3881 || reloc_type == BFD_RELOC_X86_64_32S
3882 || reloc_type == BFD_RELOC_64)
3884 && GOT_symbol == i.op[n].imms->X_add_symbol
3885 && (i.op[n].imms->X_op == O_symbol
3886 || (i.op[n].imms->X_op == O_add
3887 && ((symbol_get_value_expression
3888 (i.op[n].imms->X_op_symbol)->X_op)
3893 if (insn_start_frag == frag_now)
3894 add = (p - frag_now->fr_literal) - insn_start_off;
3899 add = insn_start_frag->fr_fix - insn_start_off;
3900 for (fr = insn_start_frag->fr_next;
3901 fr && fr != frag_now; fr = fr->fr_next)
3903 add += p - frag_now->fr_literal;
3907 reloc_type = BFD_RELOC_386_GOTPC;
3909 reloc_type = BFD_RELOC_X86_64_GOTPC32;
3911 reloc_type = BFD_RELOC_X86_64_GOTPC64;
3912 i.op[n].imms->X_add_number += add;
3914 fix_new_exp (frag_now, p - frag_now->fr_literal, size,
3915 i.op[n].imms, 0, reloc_type);
3921 /* x86_cons_fix_new is called via the expression parsing code when a
3922 reloc is needed. We use this hook to get the correct .got reloc. */
3923 static enum bfd_reloc_code_real got_reloc = NO_RELOC;
3924 static int cons_sign = -1;
3927 x86_cons_fix_new (fragS *frag,
3932 enum bfd_reloc_code_real r = reloc (len, 0, cons_sign, got_reloc);
3934 got_reloc = NO_RELOC;
3937 if (exp->X_op == O_secrel)
3939 exp->X_op = O_symbol;
3940 r = BFD_RELOC_32_SECREL;
3944 fix_new_exp (frag, off, len, exp, 0, r);
3947 #if (!defined (OBJ_ELF) && !defined (OBJ_MAYBE_ELF)) || defined (LEX_AT)
3948 # define lex_got(reloc, adjust, types) NULL
3950 /* Parse operands of the form
3951 <symbol>@GOTOFF+<nnn>
3952 and similar .plt or .got references.
3954 If we find one, set up the correct relocation in RELOC and copy the
3955 input string, minus the `@GOTOFF' into a malloc'd buffer for
3956 parsing by the calling routine. Return this buffer, and if ADJUST
3957 is non-null set it to the length of the string we removed from the
3958 input line. Otherwise return NULL. */
3960 lex_got (enum bfd_reloc_code_real *reloc,
3962 unsigned int *types)
3964 /* Some of the relocations depend on the size of what field is to
3965 be relocated. But in our callers i386_immediate and i386_displacement
3966 we don't yet know the operand size (this will be set by insn
3967 matching). Hence we record the word32 relocation here,
3968 and adjust the reloc according to the real size in reloc(). */
3969 static const struct {
3971 const enum bfd_reloc_code_real rel[2];
3972 const unsigned int types64;
3974 { "PLTOFF", { 0, BFD_RELOC_X86_64_PLTOFF64 }, Imm64 },
3975 { "PLT", { BFD_RELOC_386_PLT32, BFD_RELOC_X86_64_PLT32 }, Imm32|Imm32S|Disp32 },
3976 { "GOTPLT", { 0, BFD_RELOC_X86_64_GOTPLT64 }, Imm64|Disp64 },
3977 { "GOTOFF", { BFD_RELOC_386_GOTOFF, BFD_RELOC_X86_64_GOTOFF64 }, Imm64|Disp64 },
3978 { "GOTPCREL", { 0, BFD_RELOC_X86_64_GOTPCREL }, Imm32|Imm32S|Disp32 },
3979 { "TLSGD", { BFD_RELOC_386_TLS_GD, BFD_RELOC_X86_64_TLSGD }, Imm32|Imm32S|Disp32 },
3980 { "TLSLDM", { BFD_RELOC_386_TLS_LDM, 0 }, 0 },
3981 { "TLSLD", { 0, BFD_RELOC_X86_64_TLSLD }, Imm32|Imm32S|Disp32 },
3982 { "GOTTPOFF", { BFD_RELOC_386_TLS_IE_32, BFD_RELOC_X86_64_GOTTPOFF }, Imm32|Imm32S|Disp32 },
3983 { "TPOFF", { BFD_RELOC_386_TLS_LE_32, BFD_RELOC_X86_64_TPOFF32 }, Imm32|Imm32S|Imm64|Disp32|Disp64 },
3984 { "NTPOFF", { BFD_RELOC_386_TLS_LE, 0 }, 0 },
3985 { "DTPOFF", { BFD_RELOC_386_TLS_LDO_32, BFD_RELOC_X86_64_DTPOFF32 }, Imm32|Imm32S|Imm64|Disp32|Disp64 },
3986 { "GOTNTPOFF",{ BFD_RELOC_386_TLS_GOTIE, 0 }, 0 },
3987 { "INDNTPOFF",{ BFD_RELOC_386_TLS_IE, 0 }, 0 },
3988 { "GOT", { BFD_RELOC_386_GOT32, BFD_RELOC_X86_64_GOT32 }, Imm32|Imm32S|Disp32|Imm64 },
3989 { "TLSDESC", { BFD_RELOC_386_TLS_GOTDESC, BFD_RELOC_X86_64_GOTPC32_TLSDESC }, Imm32|Imm32S|Disp32 },
3990 { "TLSCALL", { BFD_RELOC_386_TLS_DESC_CALL, BFD_RELOC_X86_64_TLSDESC_CALL }, Imm32|Imm32S|Disp32 }
3998 for (cp = input_line_pointer; *cp != '@'; cp++)
3999 if (is_end_of_line[(unsigned char) *cp])
4002 for (j = 0; j < sizeof (gotrel) / sizeof (gotrel[0]); j++)
4006 len = strlen (gotrel[j].str);
4007 if (strncasecmp (cp + 1, gotrel[j].str, len) == 0)
4009 if (gotrel[j].rel[object_64bit] != 0)
4012 char *tmpbuf, *past_reloc;
4014 *reloc = gotrel[j].rel[object_64bit];
4020 if (flag_code != CODE_64BIT)
4021 *types = Imm32|Disp32;
4023 *types = gotrel[j].types64;
4026 if (GOT_symbol == NULL)
4027 GOT_symbol = symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME);
4029 /* Replace the relocation token with ' ', so that
4030 errors like foo@GOTOFF1 will be detected. */
4032 /* The length of the first part of our input line. */
4033 first = cp - input_line_pointer;
4035 /* The second part goes from after the reloc token until
4036 (and including) an end_of_line char. Don't use strlen
4037 here as the end_of_line char may not be a NUL. */
4038 past_reloc = cp + 1 + len;
4039 for (cp = past_reloc; !is_end_of_line[(unsigned char) *cp++]; )
4041 second = cp - past_reloc;
4043 /* Allocate and copy string. The trailing NUL shouldn't
4044 be necessary, but be safe. */
4045 tmpbuf = xmalloc (first + second + 2);
4046 memcpy (tmpbuf, input_line_pointer, first);
4047 tmpbuf[first] = ' ';
4048 memcpy (tmpbuf + first + 1, past_reloc, second);
4049 tmpbuf[first + second + 1] = '\0';
4053 as_bad (_("@%s reloc is not supported with %d-bit output format"),
4054 gotrel[j].str, 1 << (5 + object_64bit));
4059 /* Might be a symbol version string. Don't as_bad here. */
4064 x86_cons (exp, size)
4068 if (size == 4 || (object_64bit && size == 8))
4070 /* Handle @GOTOFF and the like in an expression. */
4072 char *gotfree_input_line;
4075 save = input_line_pointer;
4076 gotfree_input_line = lex_got (&got_reloc, &adjust, NULL);
4077 if (gotfree_input_line)
4078 input_line_pointer = gotfree_input_line;
4082 if (gotfree_input_line)
4084 /* expression () has merrily parsed up to the end of line,
4085 or a comma - in the wrong buffer. Transfer how far
4086 input_line_pointer has moved to the right buffer. */
4087 input_line_pointer = (save
4088 + (input_line_pointer - gotfree_input_line)
4090 free (gotfree_input_line);
4098 static void signed_cons (int size)
4100 if (flag_code == CODE_64BIT)
4108 pe_directive_secrel (dummy)
4109 int dummy ATTRIBUTE_UNUSED;
4116 if (exp.X_op == O_symbol)
4117 exp.X_op = O_secrel;
4119 emit_expr (&exp, 4);
4121 while (*input_line_pointer++ == ',');
4123 input_line_pointer--;
4124 demand_empty_rest_of_line ();
4128 static int i386_immediate PARAMS ((char *));
4131 i386_immediate (imm_start)
4134 char *save_input_line_pointer;
4135 char *gotfree_input_line;
4138 unsigned int types = ~0U;
4140 if (i.imm_operands == MAX_IMMEDIATE_OPERANDS)
4142 as_bad (_("only 1 or 2 immediate operands are allowed"));
4146 exp = &im_expressions[i.imm_operands++];
4147 i.op[this_operand].imms = exp;
4149 if (is_space_char (*imm_start))
4152 save_input_line_pointer = input_line_pointer;
4153 input_line_pointer = imm_start;
4155 gotfree_input_line = lex_got (&i.reloc[this_operand], NULL, &types);
4156 if (gotfree_input_line)
4157 input_line_pointer = gotfree_input_line;
4159 exp_seg = expression (exp);
4162 if (*input_line_pointer)
4163 as_bad (_("junk `%s' after expression"), input_line_pointer);
4165 input_line_pointer = save_input_line_pointer;
4166 if (gotfree_input_line)
4167 free (gotfree_input_line);
4169 if (exp->X_op == O_absent || exp->X_op == O_big)
4171 /* Missing or bad expr becomes absolute 0. */
4172 as_bad (_("missing or invalid immediate expression `%s' taken as 0"),
4174 exp->X_op = O_constant;
4175 exp->X_add_number = 0;
4176 exp->X_add_symbol = (symbolS *) 0;
4177 exp->X_op_symbol = (symbolS *) 0;
4179 else if (exp->X_op == O_constant)
4181 /* Size it properly later. */
4182 i.types[this_operand] |= Imm64;
4183 /* If BFD64, sign extend val. */
4184 if (!use_rela_relocations)
4185 if ((exp->X_add_number & ~(((addressT) 2 << 31) - 1)) == 0)
4186 exp->X_add_number = (exp->X_add_number ^ ((addressT) 1 << 31)) - ((addressT) 1 << 31);
4188 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
4189 else if (OUTPUT_FLAVOR == bfd_target_aout_flavour
4190 && exp_seg != absolute_section
4191 && exp_seg != text_section
4192 && exp_seg != data_section
4193 && exp_seg != bss_section
4194 && exp_seg != undefined_section
4195 && !bfd_is_com_section (exp_seg))
4197 as_bad (_("unimplemented segment %s in operand"), exp_seg->name);
4201 else if (!intel_syntax && exp->X_op == O_register)
4203 as_bad (_("illegal immediate register operand %s"), imm_start);
4208 /* This is an address. The size of the address will be
4209 determined later, depending on destination register,
4210 suffix, or the default for the section. */
4211 i.types[this_operand] |= Imm8 | Imm16 | Imm32 | Imm32S | Imm64;
4212 i.types[this_operand] &= types;
4218 static char *i386_scale PARAMS ((char *));
4225 char *save = input_line_pointer;
4227 input_line_pointer = scale;
4228 val = get_absolute_expression ();
4233 i.log2_scale_factor = 0;
4236 i.log2_scale_factor = 1;
4239 i.log2_scale_factor = 2;
4242 i.log2_scale_factor = 3;
4246 char sep = *input_line_pointer;
4248 *input_line_pointer = '\0';
4249 as_bad (_("expecting scale factor of 1, 2, 4, or 8: got `%s'"),
4251 *input_line_pointer = sep;
4252 input_line_pointer = save;
4256 if (i.log2_scale_factor != 0 && i.index_reg == 0)
4258 as_warn (_("scale factor of %d without an index register"),
4259 1 << i.log2_scale_factor);
4260 #if SCALE1_WHEN_NO_INDEX
4261 i.log2_scale_factor = 0;
4264 scale = input_line_pointer;
4265 input_line_pointer = save;
4269 static int i386_displacement PARAMS ((char *, char *));
4272 i386_displacement (disp_start, disp_end)
4278 char *save_input_line_pointer;
4279 char *gotfree_input_line;
4280 int bigdisp, override;
4281 unsigned int types = Disp;
4283 if ((i.types[this_operand] & JumpAbsolute)
4284 || !(current_templates->start->opcode_modifier & (Jump | JumpDword)))
4287 override = (i.prefix[ADDR_PREFIX] != 0);
4291 /* For PC-relative branches, the width of the displacement
4292 is dependent upon data size, not address size. */
4294 override = (i.prefix[DATA_PREFIX] != 0);
4296 if (flag_code == CODE_64BIT)
4299 bigdisp = ((override || i.suffix == WORD_MNEM_SUFFIX)
4301 : Disp32S | Disp32);
4303 bigdisp = Disp64 | Disp32S | Disp32;
4310 override = (i.suffix == (flag_code != CODE_16BIT
4312 : LONG_MNEM_SUFFIX));
4315 if ((flag_code == CODE_16BIT) ^ override)
4318 i.types[this_operand] |= bigdisp;
4320 exp = &disp_expressions[i.disp_operands];
4321 i.op[this_operand].disps = exp;
4323 save_input_line_pointer = input_line_pointer;
4324 input_line_pointer = disp_start;
4325 END_STRING_AND_SAVE (disp_end);
4327 #ifndef GCC_ASM_O_HACK
4328 #define GCC_ASM_O_HACK 0
4331 END_STRING_AND_SAVE (disp_end + 1);
4332 if ((i.types[this_operand] & BaseIndex) != 0
4333 && displacement_string_end[-1] == '+')
4335 /* This hack is to avoid a warning when using the "o"
4336 constraint within gcc asm statements.
4339 #define _set_tssldt_desc(n,addr,limit,type) \
4340 __asm__ __volatile__ ( \
4342 "movw %w1,2+%0\n\t" \
4344 "movb %b1,4+%0\n\t" \
4345 "movb %4,5+%0\n\t" \
4346 "movb $0,6+%0\n\t" \
4347 "movb %h1,7+%0\n\t" \
4349 : "=o"(*(n)) : "q" (addr), "ri"(limit), "i"(type))
4351 This works great except that the output assembler ends
4352 up looking a bit weird if it turns out that there is
4353 no offset. You end up producing code that looks like:
4366 So here we provide the missing zero. */
4368 *displacement_string_end = '0';
4371 gotfree_input_line = lex_got (&i.reloc[this_operand], NULL, &types);
4372 if (gotfree_input_line)
4373 input_line_pointer = gotfree_input_line;
4375 exp_seg = expression (exp);
4378 if (*input_line_pointer)
4379 as_bad (_("junk `%s' after expression"), input_line_pointer);
4381 RESTORE_END_STRING (disp_end + 1);
4383 RESTORE_END_STRING (disp_end);
4384 input_line_pointer = save_input_line_pointer;
4385 if (gotfree_input_line)
4386 free (gotfree_input_line);
4388 /* We do this to make sure that the section symbol is in
4389 the symbol table. We will ultimately change the relocation
4390 to be relative to the beginning of the section. */
4391 if (i.reloc[this_operand] == BFD_RELOC_386_GOTOFF
4392 || i.reloc[this_operand] == BFD_RELOC_X86_64_GOTPCREL
4393 || i.reloc[this_operand] == BFD_RELOC_X86_64_GOTOFF64)
4395 if (exp->X_op != O_symbol)
4397 as_bad (_("bad expression used with @%s"),
4398 (i.reloc[this_operand] == BFD_RELOC_X86_64_GOTPCREL
4404 if (S_IS_LOCAL (exp->X_add_symbol)
4405 && S_GET_SEGMENT (exp->X_add_symbol) != undefined_section)
4406 section_symbol (S_GET_SEGMENT (exp->X_add_symbol));
4407 exp->X_op = O_subtract;
4408 exp->X_op_symbol = GOT_symbol;
4409 if (i.reloc[this_operand] == BFD_RELOC_X86_64_GOTPCREL)
4410 i.reloc[this_operand] = BFD_RELOC_32_PCREL;
4411 else if (i.reloc[this_operand] == BFD_RELOC_X86_64_GOTOFF64)
4412 i.reloc[this_operand] = BFD_RELOC_64;
4414 i.reloc[this_operand] = BFD_RELOC_32;
4417 if (exp->X_op == O_absent || exp->X_op == O_big)
4419 /* Missing or bad expr becomes absolute 0. */
4420 as_bad (_("missing or invalid displacement expression `%s' taken as 0"),
4422 exp->X_op = O_constant;
4423 exp->X_add_number = 0;
4424 exp->X_add_symbol = (symbolS *) 0;
4425 exp->X_op_symbol = (symbolS *) 0;
4428 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
4429 if (exp->X_op != O_constant
4430 && OUTPUT_FLAVOR == bfd_target_aout_flavour
4431 && exp_seg != absolute_section
4432 && exp_seg != text_section
4433 && exp_seg != data_section
4434 && exp_seg != bss_section
4435 && exp_seg != undefined_section
4436 && !bfd_is_com_section (exp_seg))
4438 as_bad (_("unimplemented segment %s in operand"), exp_seg->name);
4443 if (!(i.types[this_operand] & ~Disp))
4444 i.types[this_operand] &= types;
4449 static int i386_index_check PARAMS ((const char *));
4451 /* Make sure the memory operand we've been dealt is valid.
4452 Return 1 on success, 0 on a failure. */
4455 i386_index_check (operand_string)
4456 const char *operand_string;
4459 #if INFER_ADDR_PREFIX
4465 if ((current_templates->start->cpu_flags & CpuSVME)
4466 && current_templates->end[-1].operand_types[0] == AnyMem)
4468 /* Memory operands of SVME insns are special in that they only allow
4469 rAX as their memory address and ignore any segment override. */
4472 /* SKINIT is even more restrictive: it always requires EAX. */
4473 if (strcmp (current_templates->start->name, "skinit") == 0)
4475 else if (flag_code == CODE_64BIT)
4476 RegXX = i.prefix[ADDR_PREFIX] == 0 ? Reg64 : Reg32;
4478 RegXX = ((flag_code == CODE_16BIT) ^ (i.prefix[ADDR_PREFIX] != 0)
4482 || !(i.base_reg->reg_type & Acc)
4483 || !(i.base_reg->reg_type & RegXX)
4485 || (i.types[0] & Disp))
4488 else if (flag_code == CODE_64BIT)
4490 unsigned RegXX = (i.prefix[ADDR_PREFIX] == 0 ? Reg64 : Reg32);
4493 && ((i.base_reg->reg_type & RegXX) == 0)
4494 && (i.base_reg->reg_type != BaseIndex
4497 && ((i.index_reg->reg_type & (RegXX | BaseIndex))
4498 != (RegXX | BaseIndex))))
4503 if ((flag_code == CODE_16BIT) ^ (i.prefix[ADDR_PREFIX] != 0))
4507 && ((i.base_reg->reg_type & (Reg16 | BaseIndex | RegRex))
4508 != (Reg16 | BaseIndex)))
4510 && (((i.index_reg->reg_type & (Reg16 | BaseIndex))
4511 != (Reg16 | BaseIndex))
4513 && i.base_reg->reg_num < 6
4514 && i.index_reg->reg_num >= 6
4515 && i.log2_scale_factor == 0))))
4522 && (i.base_reg->reg_type & (Reg32 | RegRex)) != Reg32)
4524 && ((i.index_reg->reg_type & (Reg32 | BaseIndex | RegRex))
4525 != (Reg32 | BaseIndex))))
4531 #if INFER_ADDR_PREFIX
4532 if (i.prefix[ADDR_PREFIX] == 0)
4534 i.prefix[ADDR_PREFIX] = ADDR_PREFIX_OPCODE;
4536 /* Change the size of any displacement too. At most one of
4537 Disp16 or Disp32 is set.
4538 FIXME. There doesn't seem to be any real need for separate
4539 Disp16 and Disp32 flags. The same goes for Imm16 and Imm32.
4540 Removing them would probably clean up the code quite a lot. */
4541 if (flag_code != CODE_64BIT && (i.types[this_operand] & (Disp16 | Disp32)))
4542 i.types[this_operand] ^= (Disp16 | Disp32);
4547 as_bad (_("`%s' is not a valid base/index expression"),
4551 as_bad (_("`%s' is not a valid %s bit base/index expression"),
4553 flag_code_names[flag_code]);
4558 /* Parse OPERAND_STRING into the i386_insn structure I. Returns non-zero
4562 i386_operand (operand_string)
4563 char *operand_string;
4567 char *op_string = operand_string;
4569 if (is_space_char (*op_string))
4572 /* We check for an absolute prefix (differentiating,
4573 for example, 'jmp pc_relative_label' from 'jmp *absolute_label'. */
4574 if (*op_string == ABSOLUTE_PREFIX)
4577 if (is_space_char (*op_string))
4579 i.types[this_operand] |= JumpAbsolute;
4582 /* Check if operand is a register. */
4583 if ((r = parse_register (op_string, &end_op)) != NULL)
4585 /* Check for a segment override by searching for ':' after a
4586 segment register. */
4588 if (is_space_char (*op_string))
4590 if (*op_string == ':' && (r->reg_type & (SReg2 | SReg3)))
4595 i.seg[i.mem_operands] = &es;
4598 i.seg[i.mem_operands] = &cs;
4601 i.seg[i.mem_operands] = &ss;
4604 i.seg[i.mem_operands] = &ds;
4607 i.seg[i.mem_operands] = &fs;
4610 i.seg[i.mem_operands] = &gs;
4614 /* Skip the ':' and whitespace. */
4616 if (is_space_char (*op_string))
4619 if (!is_digit_char (*op_string)
4620 && !is_identifier_char (*op_string)
4621 && *op_string != '('
4622 && *op_string != ABSOLUTE_PREFIX)
4624 as_bad (_("bad memory operand `%s'"), op_string);
4627 /* Handle case of %es:*foo. */
4628 if (*op_string == ABSOLUTE_PREFIX)
4631 if (is_space_char (*op_string))
4633 i.types[this_operand] |= JumpAbsolute;
4635 goto do_memory_reference;
4639 as_bad (_("junk `%s' after register"), op_string);
4642 i.types[this_operand] |= r->reg_type & ~BaseIndex;
4643 i.op[this_operand].regs = r;
4646 else if (*op_string == REGISTER_PREFIX)
4648 as_bad (_("bad register name `%s'"), op_string);
4651 else if (*op_string == IMMEDIATE_PREFIX)
4654 if (i.types[this_operand] & JumpAbsolute)
4656 as_bad (_("immediate operand illegal with absolute jump"));
4659 if (!i386_immediate (op_string))
4662 else if (is_digit_char (*op_string)
4663 || is_identifier_char (*op_string)
4664 || *op_string == '(')
4666 /* This is a memory reference of some sort. */
4669 /* Start and end of displacement string expression (if found). */
4670 char *displacement_string_start;
4671 char *displacement_string_end;
4673 do_memory_reference:
4674 if ((i.mem_operands == 1
4675 && (current_templates->start->opcode_modifier & IsString) == 0)
4676 || i.mem_operands == 2)
4678 as_bad (_("too many memory references for `%s'"),
4679 current_templates->start->name);
4683 /* Check for base index form. We detect the base index form by
4684 looking for an ')' at the end of the operand, searching
4685 for the '(' matching it, and finding a REGISTER_PREFIX or ','
4687 base_string = op_string + strlen (op_string);
4690 if (is_space_char (*base_string))
4693 /* If we only have a displacement, set-up for it to be parsed later. */
4694 displacement_string_start = op_string;
4695 displacement_string_end = base_string + 1;
4697 if (*base_string == ')')
4700 unsigned int parens_balanced = 1;
4701 /* We've already checked that the number of left & right ()'s are
4702 equal, so this loop will not be infinite. */
4706 if (*base_string == ')')
4708 if (*base_string == '(')
4711 while (parens_balanced);
4713 temp_string = base_string;
4715 /* Skip past '(' and whitespace. */
4717 if (is_space_char (*base_string))
4720 if (*base_string == ','
4721 || ((i.base_reg = parse_register (base_string, &end_op)) != NULL))
4723 displacement_string_end = temp_string;
4725 i.types[this_operand] |= BaseIndex;
4729 base_string = end_op;
4730 if (is_space_char (*base_string))
4734 /* There may be an index reg or scale factor here. */
4735 if (*base_string == ',')
4738 if (is_space_char (*base_string))
4741 if ((i.index_reg = parse_register (base_string, &end_op)) != NULL)
4743 base_string = end_op;
4744 if (is_space_char (*base_string))
4746 if (*base_string == ',')
4749 if (is_space_char (*base_string))
4752 else if (*base_string != ')')
4754 as_bad (_("expecting `,' or `)' after index register in `%s'"),
4759 else if (*base_string == REGISTER_PREFIX)
4761 as_bad (_("bad register name `%s'"), base_string);
4765 /* Check for scale factor. */
4766 if (*base_string != ')')
4768 char *end_scale = i386_scale (base_string);
4773 base_string = end_scale;
4774 if (is_space_char (*base_string))
4776 if (*base_string != ')')
4778 as_bad (_("expecting `)' after scale factor in `%s'"),
4783 else if (!i.index_reg)
4785 as_bad (_("expecting index register or scale factor after `,'; got '%c'"),
4790 else if (*base_string != ')')
4792 as_bad (_("expecting `,' or `)' after base register in `%s'"),
4797 else if (*base_string == REGISTER_PREFIX)
4799 as_bad (_("bad register name `%s'"), base_string);
4804 /* If there's an expression beginning the operand, parse it,
4805 assuming displacement_string_start and
4806 displacement_string_end are meaningful. */
4807 if (displacement_string_start != displacement_string_end)
4809 if (!i386_displacement (displacement_string_start,
4810 displacement_string_end))
4814 /* Special case for (%dx) while doing input/output op. */
4816 && i.base_reg->reg_type == (Reg16 | InOutPortReg)
4818 && i.log2_scale_factor == 0
4819 && i.seg[i.mem_operands] == 0
4820 && (i.types[this_operand] & Disp) == 0)
4822 i.types[this_operand] = InOutPortReg;
4826 if (i386_index_check (operand_string) == 0)
4832 /* It's not a memory operand; argh! */
4833 as_bad (_("invalid char %s beginning operand %d `%s'"),
4834 output_invalid (*op_string),
4839 return 1; /* Normal return. */
4842 /* md_estimate_size_before_relax()
4844 Called just before relax() for rs_machine_dependent frags. The x86
4845 assembler uses these frags to handle variable size jump
4848 Any symbol that is now undefined will not become defined.
4849 Return the correct fr_subtype in the frag.
4850 Return the initial "guess for variable size of frag" to caller.
4851 The guess is actually the growth beyond the fixed part. Whatever
4852 we do to grow the fixed or variable part contributes to our
4856 md_estimate_size_before_relax (fragP, segment)
4860 /* We've already got fragP->fr_subtype right; all we have to do is
4861 check for un-relaxable symbols. On an ELF system, we can't relax
4862 an externally visible symbol, because it may be overridden by a
4864 if (S_GET_SEGMENT (fragP->fr_symbol) != segment
4865 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
4867 && (S_IS_EXTERNAL (fragP->fr_symbol)
4868 || S_IS_WEAK (fragP->fr_symbol)))
4872 /* Symbol is undefined in this segment, or we need to keep a
4873 reloc so that weak symbols can be overridden. */
4874 int size = (fragP->fr_subtype & CODE16) ? 2 : 4;
4875 enum bfd_reloc_code_real reloc_type;
4876 unsigned char *opcode;
4879 if (fragP->fr_var != NO_RELOC)
4880 reloc_type = fragP->fr_var;
4882 reloc_type = BFD_RELOC_16_PCREL;
4884 reloc_type = BFD_RELOC_32_PCREL;
4886 old_fr_fix = fragP->fr_fix;
4887 opcode = (unsigned char *) fragP->fr_opcode;
4889 switch (TYPE_FROM_RELAX_STATE (fragP->fr_subtype))
4892 /* Make jmp (0xeb) a (d)word displacement jump. */
4894 fragP->fr_fix += size;
4895 fix_new (fragP, old_fr_fix, size,
4897 fragP->fr_offset, 1,
4903 && (!no_cond_jump_promotion || fragP->fr_var != NO_RELOC))
4905 /* Negate the condition, and branch past an
4906 unconditional jump. */
4909 /* Insert an unconditional jump. */
4911 /* We added two extra opcode bytes, and have a two byte
4913 fragP->fr_fix += 2 + 2;
4914 fix_new (fragP, old_fr_fix + 2, 2,
4916 fragP->fr_offset, 1,
4923 if (no_cond_jump_promotion && fragP->fr_var == NO_RELOC)
4928 fixP = fix_new (fragP, old_fr_fix, 1,
4930 fragP->fr_offset, 1,
4932 fixP->fx_signed = 1;
4936 /* This changes the byte-displacement jump 0x7N
4937 to the (d)word-displacement jump 0x0f,0x8N. */
4938 opcode[1] = opcode[0] + 0x10;
4939 opcode[0] = TWO_BYTE_OPCODE_ESCAPE;
4940 /* We've added an opcode byte. */
4941 fragP->fr_fix += 1 + size;
4942 fix_new (fragP, old_fr_fix + 1, size,
4944 fragP->fr_offset, 1,
4949 BAD_CASE (fragP->fr_subtype);
4953 return fragP->fr_fix - old_fr_fix;
4956 /* Guess size depending on current relax state. Initially the relax
4957 state will correspond to a short jump and we return 1, because
4958 the variable part of the frag (the branch offset) is one byte
4959 long. However, we can relax a section more than once and in that
4960 case we must either set fr_subtype back to the unrelaxed state,
4961 or return the value for the appropriate branch. */
4962 return md_relax_table[fragP->fr_subtype].rlx_length;
4965 /* Called after relax() is finished.
4967 In: Address of frag.
4968 fr_type == rs_machine_dependent.
4969 fr_subtype is what the address relaxed to.
4971 Out: Any fixSs and constants are set up.
4972 Caller will turn frag into a ".space 0". */
4975 md_convert_frag (abfd, sec, fragP)
4976 bfd *abfd ATTRIBUTE_UNUSED;
4977 segT sec ATTRIBUTE_UNUSED;
4980 unsigned char *opcode;
4981 unsigned char *where_to_put_displacement = NULL;
4982 offsetT target_address;
4983 offsetT opcode_address;
4984 unsigned int extension = 0;
4985 offsetT displacement_from_opcode_start;
4987 opcode = (unsigned char *) fragP->fr_opcode;
4989 /* Address we want to reach in file space. */
4990 target_address = S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset;
4992 /* Address opcode resides at in file space. */
4993 opcode_address = fragP->fr_address + fragP->fr_fix;
4995 /* Displacement from opcode start to fill into instruction. */
4996 displacement_from_opcode_start = target_address - opcode_address;
4998 if ((fragP->fr_subtype & BIG) == 0)
5000 /* Don't have to change opcode. */
5001 extension = 1; /* 1 opcode + 1 displacement */
5002 where_to_put_displacement = &opcode[1];
5006 if (no_cond_jump_promotion
5007 && TYPE_FROM_RELAX_STATE (fragP->fr_subtype) != UNCOND_JUMP)
5008 as_warn_where (fragP->fr_file, fragP->fr_line, _("long jump required"));
5010 switch (fragP->fr_subtype)
5012 case ENCODE_RELAX_STATE (UNCOND_JUMP, BIG):
5013 extension = 4; /* 1 opcode + 4 displacement */
5015 where_to_put_displacement = &opcode[1];
5018 case ENCODE_RELAX_STATE (UNCOND_JUMP, BIG16):
5019 extension = 2; /* 1 opcode + 2 displacement */
5021 where_to_put_displacement = &opcode[1];
5024 case ENCODE_RELAX_STATE (COND_JUMP, BIG):
5025 case ENCODE_RELAX_STATE (COND_JUMP86, BIG):
5026 extension = 5; /* 2 opcode + 4 displacement */
5027 opcode[1] = opcode[0] + 0x10;
5028 opcode[0] = TWO_BYTE_OPCODE_ESCAPE;
5029 where_to_put_displacement = &opcode[2];
5032 case ENCODE_RELAX_STATE (COND_JUMP, BIG16):
5033 extension = 3; /* 2 opcode + 2 displacement */
5034 opcode[1] = opcode[0] + 0x10;
5035 opcode[0] = TWO_BYTE_OPCODE_ESCAPE;
5036 where_to_put_displacement = &opcode[2];
5039 case ENCODE_RELAX_STATE (COND_JUMP86, BIG16):
5044 where_to_put_displacement = &opcode[3];
5048 BAD_CASE (fragP->fr_subtype);
5053 /* If size if less then four we are sure that the operand fits,
5054 but if it's 4, then it could be that the displacement is larger
5056 if (DISP_SIZE_FROM_RELAX_STATE (fragP->fr_subtype) == 4
5058 && ((addressT) (displacement_from_opcode_start - extension
5059 + ((addressT) 1 << 31))
5060 > (((addressT) 2 << 31) - 1)))
5062 as_bad_where (fragP->fr_file, fragP->fr_line,
5063 _("jump target out of range"));
5064 /* Make us emit 0. */
5065 displacement_from_opcode_start = extension;
5067 /* Now put displacement after opcode. */
5068 md_number_to_chars ((char *) where_to_put_displacement,
5069 (valueT) (displacement_from_opcode_start - extension),
5070 DISP_SIZE_FROM_RELAX_STATE (fragP->fr_subtype));
5071 fragP->fr_fix += extension;
5074 /* Size of byte displacement jmp. */
5075 int md_short_jump_size = 2;
5077 /* Size of dword displacement jmp. */
5078 int md_long_jump_size = 5;
5081 md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
5083 addressT from_addr, to_addr;
5084 fragS *frag ATTRIBUTE_UNUSED;
5085 symbolS *to_symbol ATTRIBUTE_UNUSED;
5089 offset = to_addr - (from_addr + 2);
5090 /* Opcode for byte-disp jump. */
5091 md_number_to_chars (ptr, (valueT) 0xeb, 1);
5092 md_number_to_chars (ptr + 1, (valueT) offset, 1);
5096 md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
5098 addressT from_addr, to_addr;
5099 fragS *frag ATTRIBUTE_UNUSED;
5100 symbolS *to_symbol ATTRIBUTE_UNUSED;
5104 offset = to_addr - (from_addr + 5);
5105 md_number_to_chars (ptr, (valueT) 0xe9, 1);
5106 md_number_to_chars (ptr + 1, (valueT) offset, 4);
5109 /* Apply a fixup (fixS) to segment data, once it has been determined
5110 by our caller that we have all the info we need to fix it up.
5112 On the 386, immediates, displacements, and data pointers are all in
5113 the same (little-endian) format, so we don't need to care about which
5117 md_apply_fix (fixP, valP, seg)
5118 /* The fix we're to put in. */
5120 /* Pointer to the value of the bits. */
5122 /* Segment fix is from. */
5123 segT seg ATTRIBUTE_UNUSED;
5125 char *p = fixP->fx_where + fixP->fx_frag->fr_literal;
5126 valueT value = *valP;
5128 #if !defined (TE_Mach)
5131 switch (fixP->fx_r_type)
5137 fixP->fx_r_type = BFD_RELOC_64_PCREL;
5140 case BFD_RELOC_X86_64_32S:
5141 fixP->fx_r_type = BFD_RELOC_32_PCREL;
5144 fixP->fx_r_type = BFD_RELOC_16_PCREL;
5147 fixP->fx_r_type = BFD_RELOC_8_PCREL;
5152 if (fixP->fx_addsy != NULL
5153 && (fixP->fx_r_type == BFD_RELOC_32_PCREL
5154 || fixP->fx_r_type == BFD_RELOC_64_PCREL
5155 || fixP->fx_r_type == BFD_RELOC_16_PCREL
5156 || fixP->fx_r_type == BFD_RELOC_8_PCREL)
5157 && !use_rela_relocations)
5159 /* This is a hack. There should be a better way to handle this.
5160 This covers for the fact that bfd_install_relocation will
5161 subtract the current location (for partial_inplace, PC relative
5162 relocations); see more below. */
5166 || OUTPUT_FLAVOR == bfd_target_coff_flavour
5169 value += fixP->fx_where + fixP->fx_frag->fr_address;
5171 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5174 segT sym_seg = S_GET_SEGMENT (fixP->fx_addsy);
5177 || (symbol_section_p (fixP->fx_addsy)
5178 && sym_seg != absolute_section))
5179 && !generic_force_reloc (fixP))
5181 /* Yes, we add the values in twice. This is because
5182 bfd_install_relocation subtracts them out again. I think
5183 bfd_install_relocation is broken, but I don't dare change
5185 value += fixP->fx_where + fixP->fx_frag->fr_address;
5189 #if defined (OBJ_COFF) && defined (TE_PE)
5190 /* For some reason, the PE format does not store a
5191 section address offset for a PC relative symbol. */
5192 if (S_GET_SEGMENT (fixP->fx_addsy) != seg
5193 || S_IS_WEAK (fixP->fx_addsy))
5194 value += md_pcrel_from (fixP);
5198 /* Fix a few things - the dynamic linker expects certain values here,
5199 and we must not disappoint it. */
5200 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5201 if (IS_ELF && fixP->fx_addsy)
5202 switch (fixP->fx_r_type)
5204 case BFD_RELOC_386_PLT32:
5205 case BFD_RELOC_X86_64_PLT32:
5206 /* Make the jump instruction point to the address of the operand. At
5207 runtime we merely add the offset to the actual PLT entry. */
5211 case BFD_RELOC_386_TLS_GD:
5212 case BFD_RELOC_386_TLS_LDM:
5213 case BFD_RELOC_386_TLS_IE_32:
5214 case BFD_RELOC_386_TLS_IE:
5215 case BFD_RELOC_386_TLS_GOTIE:
5216 case BFD_RELOC_386_TLS_GOTDESC:
5217 case BFD_RELOC_X86_64_TLSGD:
5218 case BFD_RELOC_X86_64_TLSLD:
5219 case BFD_RELOC_X86_64_GOTTPOFF:
5220 case BFD_RELOC_X86_64_GOTPC32_TLSDESC:
5221 value = 0; /* Fully resolved at runtime. No addend. */
5223 case BFD_RELOC_386_TLS_LE:
5224 case BFD_RELOC_386_TLS_LDO_32:
5225 case BFD_RELOC_386_TLS_LE_32:
5226 case BFD_RELOC_X86_64_DTPOFF32:
5227 case BFD_RELOC_X86_64_DTPOFF64:
5228 case BFD_RELOC_X86_64_TPOFF32:
5229 case BFD_RELOC_X86_64_TPOFF64:
5230 S_SET_THREAD_LOCAL (fixP->fx_addsy);
5233 case BFD_RELOC_386_TLS_DESC_CALL:
5234 case BFD_RELOC_X86_64_TLSDESC_CALL:
5235 value = 0; /* Fully resolved at runtime. No addend. */
5236 S_SET_THREAD_LOCAL (fixP->fx_addsy);
5240 case BFD_RELOC_386_GOT32:
5241 case BFD_RELOC_X86_64_GOT32:
5242 value = 0; /* Fully resolved at runtime. No addend. */
5245 case BFD_RELOC_VTABLE_INHERIT:
5246 case BFD_RELOC_VTABLE_ENTRY:
5253 #endif /* defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) */
5255 #endif /* !defined (TE_Mach) */
5257 /* Are we finished with this relocation now? */
5258 if (fixP->fx_addsy == NULL)
5260 else if (use_rela_relocations)
5262 fixP->fx_no_overflow = 1;
5263 /* Remember value for tc_gen_reloc. */
5264 fixP->fx_addnumber = value;
5268 md_number_to_chars (p, value, fixP->fx_size);
5271 #define MAX_LITTLENUMS 6
5273 /* Turn the string pointed to by litP into a floating point constant
5274 of type TYPE, and emit the appropriate bytes. The number of
5275 LITTLENUMS emitted is stored in *SIZEP. An error message is
5276 returned, or NULL on OK. */
5279 md_atof (type, litP, sizeP)
5285 LITTLENUM_TYPE words[MAX_LITTLENUMS];
5286 LITTLENUM_TYPE *wordP;
5308 return _("Bad call to md_atof ()");
5310 t = atof_ieee (input_line_pointer, type, words);
5312 input_line_pointer = t;
5314 *sizeP = prec * sizeof (LITTLENUM_TYPE);
5315 /* This loops outputs the LITTLENUMs in REVERSE order; in accord with
5316 the bigendian 386. */
5317 for (wordP = words + prec - 1; prec--;)
5319 md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
5320 litP += sizeof (LITTLENUM_TYPE);
5325 static char output_invalid_buf[sizeof (unsigned char) * 2 + 6];
5332 snprintf (output_invalid_buf, sizeof (output_invalid_buf),
5335 snprintf (output_invalid_buf, sizeof (output_invalid_buf),
5336 "(0x%x)", (unsigned char) c);
5337 return output_invalid_buf;
5340 /* REG_STRING starts *before* REGISTER_PREFIX. */
5342 static const reg_entry *
5343 parse_real_register (char *reg_string, char **end_op)
5345 char *s = reg_string;
5347 char reg_name_given[MAX_REG_NAME_SIZE + 1];
5350 /* Skip possible REGISTER_PREFIX and possible whitespace. */
5351 if (*s == REGISTER_PREFIX)
5354 if (is_space_char (*s))
5358 while ((*p++ = register_chars[(unsigned char) *s]) != '\0')
5360 if (p >= reg_name_given + MAX_REG_NAME_SIZE)
5361 return (const reg_entry *) NULL;
5365 /* For naked regs, make sure that we are not dealing with an identifier.
5366 This prevents confusing an identifier like `eax_var' with register
5368 if (allow_naked_reg && identifier_chars[(unsigned char) *s])
5369 return (const reg_entry *) NULL;
5373 r = (const reg_entry *) hash_find (reg_hash, reg_name_given);
5375 /* Handle floating point regs, allowing spaces in the (i) part. */
5376 if (r == i386_regtab /* %st is first entry of table */)
5378 if (is_space_char (*s))
5383 if (is_space_char (*s))
5385 if (*s >= '0' && *s <= '7')
5387 r = &i386_float_regtab[*s - '0'];
5389 if (is_space_char (*s))
5397 /* We have "%st(" then garbage. */
5398 return (const reg_entry *) NULL;
5403 && ((r->reg_flags & (RegRex64 | RegRex)) | (r->reg_type & Reg64)) != 0
5404 && (r->reg_type != Control || !(cpu_arch_flags & CpuSledgehammer))
5405 && flag_code != CODE_64BIT)
5406 return (const reg_entry *) NULL;
5411 /* REG_STRING starts *before* REGISTER_PREFIX. */
5413 static const reg_entry *
5414 parse_register (char *reg_string, char **end_op)
5418 if (*reg_string == REGISTER_PREFIX || allow_naked_reg)
5419 r = parse_real_register (reg_string, end_op);
5424 char *save = input_line_pointer;
5428 input_line_pointer = reg_string;
5429 c = get_symbol_end ();
5430 symbolP = symbol_find (reg_string);
5431 if (symbolP && S_GET_SEGMENT (symbolP) == reg_section)
5433 const expressionS *e = symbol_get_value_expression (symbolP);
5435 know (e->X_op == O_register);
5436 know (e->X_add_number >= 0 && (valueT) e->X_add_number < ARRAY_SIZE (i386_regtab));
5437 r = i386_regtab + e->X_add_number;
5438 *end_op = input_line_pointer;
5440 *input_line_pointer = c;
5441 input_line_pointer = save;
5447 i386_parse_name (char *name, expressionS *e, char *nextcharP)
5450 char *end = input_line_pointer;
5453 r = parse_register (name, &input_line_pointer);
5454 if (r && end <= input_line_pointer)
5456 *nextcharP = *input_line_pointer;
5457 *input_line_pointer = 0;
5458 e->X_op = O_register;
5459 e->X_add_number = r - i386_regtab;
5462 input_line_pointer = end;
5468 md_operand (expressionS *e)
5470 if (*input_line_pointer == REGISTER_PREFIX)
5473 const reg_entry *r = parse_real_register (input_line_pointer, &end);
5477 e->X_op = O_register;
5478 e->X_add_number = r - i386_regtab;
5479 input_line_pointer = end;
5485 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5486 const char *md_shortopts = "kVQ:sqn";
5488 const char *md_shortopts = "qn";
5491 #define OPTION_32 (OPTION_MD_BASE + 0)
5492 #define OPTION_64 (OPTION_MD_BASE + 1)
5493 #define OPTION_DIVIDE (OPTION_MD_BASE + 2)
5494 #define OPTION_MARCH (OPTION_MD_BASE + 3)
5495 #define OPTION_MTUNE (OPTION_MD_BASE + 4)
5497 struct option md_longopts[] = {
5498 {"32", no_argument, NULL, OPTION_32},
5499 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5500 {"64", no_argument, NULL, OPTION_64},
5502 {"divide", no_argument, NULL, OPTION_DIVIDE},
5503 {"march", required_argument, NULL, OPTION_MARCH},
5504 {"mtune", required_argument, NULL, OPTION_MTUNE},
5505 {NULL, no_argument, NULL, 0}
5507 size_t md_longopts_size = sizeof (md_longopts);
5510 md_parse_option (int c, char *arg)
5517 optimize_align_code = 0;
5524 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5525 /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section
5526 should be emitted or not. FIXME: Not implemented. */
5530 /* -V: SVR4 argument to print version ID. */
5532 print_version_id ();
5535 /* -k: Ignore for FreeBSD compatibility. */
5540 /* -s: On i386 Solaris, this tells the native assembler to use
5541 .stab instead of .stab.excl. We always use .stab anyhow. */
5546 const char **list, **l;
5548 list = bfd_target_list ();
5549 for (l = list; *l != NULL; l++)
5550 if (strcmp (*l, "elf64-x86-64") == 0)
5552 default_arch = "x86_64";
5556 as_fatal (_("No compiled in support for x86_64"));
5563 default_arch = "i386";
5567 #ifdef SVR4_COMMENT_CHARS
5572 n = (char *) xmalloc (strlen (i386_comment_chars) + 1);
5574 for (s = i386_comment_chars; *s != '\0'; s++)
5578 i386_comment_chars = n;
5585 as_fatal (_("Invalid -march= option: `%s'"), arg);
5586 for (i = 0; i < ARRAY_SIZE (cpu_arch); i++)
5588 if (strcmp (arg, cpu_arch [i].name) == 0)
5590 cpu_arch_isa_flags = cpu_arch[i].flags;
5594 if (i >= ARRAY_SIZE (cpu_arch))
5595 as_fatal (_("Invalid -march= option: `%s'"), arg);
5600 as_fatal (_("Invalid -mtune= option: `%s'"), arg);
5601 for (i = 0; i < ARRAY_SIZE (cpu_arch); i++)
5603 if (strcmp (arg, cpu_arch [i].name) == 0)
5605 cpu_arch_tune = cpu_arch [i].type;
5606 cpu_arch_tune_flags = cpu_arch[i].flags;
5610 if (i >= ARRAY_SIZE (cpu_arch))
5611 as_fatal (_("Invalid -mtune= option: `%s'"), arg);
5621 md_show_usage (stream)
5624 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5625 fprintf (stream, _("\
5627 -V print assembler version number\n\
5630 fprintf (stream, _("\
5631 -n Do not optimize code alignment\n\
5632 -q quieten some warnings\n"));
5633 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5634 fprintf (stream, _("\
5637 #ifdef SVR4_COMMENT_CHARS
5638 fprintf (stream, _("\
5639 --divide do not treat `/' as a comment character\n"));
5641 fprintf (stream, _("\
5642 --divide ignored\n"));
5644 fprintf (stream, _("\
5645 -march=CPU/-mtune=CPU generate code/optimize for CPU, where CPU is one of:\n\
5646 i386, i486, pentium, pentiumpro, pentium4, nocona,\n\
5647 yonah, merom, k6, athlon, k8, generic32, generic64\n"));
5651 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
5652 || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF))
5654 /* Pick the target format to use. */
5657 i386_target_format ()
5659 if (!strcmp (default_arch, "x86_64"))
5661 set_code_flag (CODE_64BIT);
5662 if (cpu_arch_isa_flags == 0)
5663 cpu_arch_isa_flags = Cpu086|Cpu186|Cpu286|Cpu386|Cpu486
5664 |Cpu586|Cpu686|CpuP4|CpuMMX|CpuMMX2
5666 if (cpu_arch_tune == PROCESSOR_UNKNOWN)
5668 cpu_arch_tune = PROCESSOR_GENERIC64;
5669 cpu_arch_tune_flags = Cpu086|Cpu186|Cpu286|Cpu386|Cpu486
5670 |Cpu586|Cpu686|CpuP4|CpuMMX|CpuMMX2
5674 else if (!strcmp (default_arch, "i386"))
5676 set_code_flag (CODE_32BIT);
5677 if (cpu_arch_isa_flags == 0)
5678 cpu_arch_isa_flags = Cpu086|Cpu186|Cpu286|Cpu386;
5679 if (cpu_arch_tune == PROCESSOR_UNKNOWN)
5681 cpu_arch_tune = PROCESSOR_GENERIC32;
5682 cpu_arch_tune_flags = Cpu086|Cpu186|Cpu286|Cpu386;
5686 as_fatal (_("Unknown architecture"));
5687 switch (OUTPUT_FLAVOR)
5689 #ifdef OBJ_MAYBE_AOUT
5690 case bfd_target_aout_flavour:
5691 return AOUT_TARGET_FORMAT;
5693 #ifdef OBJ_MAYBE_COFF
5694 case bfd_target_coff_flavour:
5697 #if defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF)
5698 case bfd_target_elf_flavour:
5700 if (flag_code == CODE_64BIT)
5703 use_rela_relocations = 1;
5705 return flag_code == CODE_64BIT ? "elf64-x86-64" : ELF_TARGET_FORMAT;
5714 #endif /* OBJ_MAYBE_ more than one */
5716 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF))
5717 void i386_elf_emit_arch_note ()
5719 if (IS_ELF && cpu_arch_name != NULL)
5722 asection *seg = now_seg;
5723 subsegT subseg = now_subseg;
5724 Elf_Internal_Note i_note;
5725 Elf_External_Note e_note;
5726 asection *note_secp;
5729 /* Create the .note section. */
5730 note_secp = subseg_new (".note", 0);
5731 bfd_set_section_flags (stdoutput,
5733 SEC_HAS_CONTENTS | SEC_READONLY);
5735 /* Process the arch string. */
5736 len = strlen (cpu_arch_name);
5738 i_note.namesz = len + 1;
5740 i_note.type = NT_ARCH;
5741 p = frag_more (sizeof (e_note.namesz));
5742 md_number_to_chars (p, (valueT) i_note.namesz, sizeof (e_note.namesz));
5743 p = frag_more (sizeof (e_note.descsz));
5744 md_number_to_chars (p, (valueT) i_note.descsz, sizeof (e_note.descsz));
5745 p = frag_more (sizeof (e_note.type));
5746 md_number_to_chars (p, (valueT) i_note.type, sizeof (e_note.type));
5747 p = frag_more (len + 1);
5748 strcpy (p, cpu_arch_name);
5750 frag_align (2, 0, 0);
5752 subseg_set (seg, subseg);
5758 md_undefined_symbol (name)
5761 if (name[0] == GLOBAL_OFFSET_TABLE_NAME[0]
5762 && name[1] == GLOBAL_OFFSET_TABLE_NAME[1]
5763 && name[2] == GLOBAL_OFFSET_TABLE_NAME[2]
5764 && strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0)
5768 if (symbol_find (name))
5769 as_bad (_("GOT already in symbol table"));
5770 GOT_symbol = symbol_new (name, undefined_section,
5771 (valueT) 0, &zero_address_frag);
5778 /* Round up a section size to the appropriate boundary. */
5781 md_section_align (segment, size)
5782 segT segment ATTRIBUTE_UNUSED;
5785 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
5786 if (OUTPUT_FLAVOR == bfd_target_aout_flavour)
5788 /* For a.out, force the section size to be aligned. If we don't do
5789 this, BFD will align it for us, but it will not write out the
5790 final bytes of the section. This may be a bug in BFD, but it is
5791 easier to fix it here since that is how the other a.out targets
5795 align = bfd_get_section_alignment (stdoutput, segment);
5796 size = ((size + (1 << align) - 1) & ((valueT) -1 << align));
5803 /* On the i386, PC-relative offsets are relative to the start of the
5804 next instruction. That is, the address of the offset, plus its
5805 size, since the offset is always the last part of the insn. */
5808 md_pcrel_from (fixP)
5811 return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
5818 int ignore ATTRIBUTE_UNUSED;
5822 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
5824 obj_elf_section_change_hook ();
5826 temp = get_absolute_expression ();
5827 subseg_set (bss_section, (subsegT) temp);
5828 demand_empty_rest_of_line ();
5834 i386_validate_fix (fixp)
5837 if (fixp->fx_subsy && fixp->fx_subsy == GOT_symbol)
5839 if (fixp->fx_r_type == BFD_RELOC_32_PCREL)
5843 fixp->fx_r_type = BFD_RELOC_X86_64_GOTPCREL;
5848 fixp->fx_r_type = BFD_RELOC_386_GOTOFF;
5850 fixp->fx_r_type = BFD_RELOC_X86_64_GOTOFF64;
5857 tc_gen_reloc (section, fixp)
5858 asection *section ATTRIBUTE_UNUSED;
5862 bfd_reloc_code_real_type code;
5864 switch (fixp->fx_r_type)
5866 case BFD_RELOC_X86_64_PLT32:
5867 case BFD_RELOC_X86_64_GOT32:
5868 case BFD_RELOC_X86_64_GOTPCREL:
5869 case BFD_RELOC_386_PLT32:
5870 case BFD_RELOC_386_GOT32:
5871 case BFD_RELOC_386_GOTOFF:
5872 case BFD_RELOC_386_GOTPC:
5873 case BFD_RELOC_386_TLS_GD:
5874 case BFD_RELOC_386_TLS_LDM:
5875 case BFD_RELOC_386_TLS_LDO_32:
5876 case BFD_RELOC_386_TLS_IE_32:
5877 case BFD_RELOC_386_TLS_IE:
5878 case BFD_RELOC_386_TLS_GOTIE:
5879 case BFD_RELOC_386_TLS_LE_32:
5880 case BFD_RELOC_386_TLS_LE:
5881 case BFD_RELOC_386_TLS_GOTDESC:
5882 case BFD_RELOC_386_TLS_DESC_CALL:
5883 case BFD_RELOC_X86_64_TLSGD:
5884 case BFD_RELOC_X86_64_TLSLD:
5885 case BFD_RELOC_X86_64_DTPOFF32:
5886 case BFD_RELOC_X86_64_DTPOFF64:
5887 case BFD_RELOC_X86_64_GOTTPOFF:
5888 case BFD_RELOC_X86_64_TPOFF32:
5889 case BFD_RELOC_X86_64_TPOFF64:
5890 case BFD_RELOC_X86_64_GOTOFF64:
5891 case BFD_RELOC_X86_64_GOTPC32:
5892 case BFD_RELOC_X86_64_GOT64:
5893 case BFD_RELOC_X86_64_GOTPCREL64:
5894 case BFD_RELOC_X86_64_GOTPC64:
5895 case BFD_RELOC_X86_64_GOTPLT64:
5896 case BFD_RELOC_X86_64_PLTOFF64:
5897 case BFD_RELOC_X86_64_GOTPC32_TLSDESC:
5898 case BFD_RELOC_X86_64_TLSDESC_CALL:
5900 case BFD_RELOC_VTABLE_ENTRY:
5901 case BFD_RELOC_VTABLE_INHERIT:
5903 case BFD_RELOC_32_SECREL:
5905 code = fixp->fx_r_type;
5907 case BFD_RELOC_X86_64_32S:
5908 if (!fixp->fx_pcrel)
5910 /* Don't turn BFD_RELOC_X86_64_32S into BFD_RELOC_32. */
5911 code = fixp->fx_r_type;
5917 switch (fixp->fx_size)
5920 as_bad_where (fixp->fx_file, fixp->fx_line,
5921 _("can not do %d byte pc-relative relocation"),
5923 code = BFD_RELOC_32_PCREL;
5925 case 1: code = BFD_RELOC_8_PCREL; break;
5926 case 2: code = BFD_RELOC_16_PCREL; break;
5927 case 4: code = BFD_RELOC_32_PCREL; break;
5929 case 8: code = BFD_RELOC_64_PCREL; break;
5935 switch (fixp->fx_size)
5938 as_bad_where (fixp->fx_file, fixp->fx_line,
5939 _("can not do %d byte relocation"),
5941 code = BFD_RELOC_32;
5943 case 1: code = BFD_RELOC_8; break;
5944 case 2: code = BFD_RELOC_16; break;
5945 case 4: code = BFD_RELOC_32; break;
5947 case 8: code = BFD_RELOC_64; break;
5954 if ((code == BFD_RELOC_32
5955 || code == BFD_RELOC_32_PCREL
5956 || code == BFD_RELOC_X86_64_32S)
5958 && fixp->fx_addsy == GOT_symbol)
5961 code = BFD_RELOC_386_GOTPC;
5963 code = BFD_RELOC_X86_64_GOTPC32;
5965 if ((code == BFD_RELOC_64 || code == BFD_RELOC_64_PCREL)
5967 && fixp->fx_addsy == GOT_symbol)
5969 code = BFD_RELOC_X86_64_GOTPC64;
5972 rel = (arelent *) xmalloc (sizeof (arelent));
5973 rel->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
5974 *rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
5976 rel->address = fixp->fx_frag->fr_address + fixp->fx_where;
5978 if (!use_rela_relocations)
5980 /* HACK: Since i386 ELF uses Rel instead of Rela, encode the
5981 vtable entry to be used in the relocation's section offset. */
5982 if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
5983 rel->address = fixp->fx_offset;
5987 /* Use the rela in 64bit mode. */
5990 if (!fixp->fx_pcrel)
5991 rel->addend = fixp->fx_offset;
5995 case BFD_RELOC_X86_64_PLT32:
5996 case BFD_RELOC_X86_64_GOT32:
5997 case BFD_RELOC_X86_64_GOTPCREL:
5998 case BFD_RELOC_X86_64_TLSGD:
5999 case BFD_RELOC_X86_64_TLSLD:
6000 case BFD_RELOC_X86_64_GOTTPOFF:
6001 case BFD_RELOC_X86_64_GOTPC32_TLSDESC:
6002 case BFD_RELOC_X86_64_TLSDESC_CALL:
6003 rel->addend = fixp->fx_offset - fixp->fx_size;
6006 rel->addend = (section->vma
6008 + fixp->fx_addnumber
6009 + md_pcrel_from (fixp));
6014 rel->howto = bfd_reloc_type_lookup (stdoutput, code);
6015 if (rel->howto == NULL)
6017 as_bad_where (fixp->fx_file, fixp->fx_line,
6018 _("cannot represent relocation type %s"),
6019 bfd_get_reloc_code_name (code));
6020 /* Set howto to a garbage value so that we can keep going. */
6021 rel->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32);
6022 assert (rel->howto != NULL);
6029 /* Parse operands using Intel syntax. This implements a recursive descent
6030 parser based on the BNF grammar published in Appendix B of the MASM 6.1
6033 FIXME: We do not recognize the full operand grammar defined in the MASM
6034 documentation. In particular, all the structure/union and
6035 high-level macro operands are missing.
6037 Uppercase words are terminals, lower case words are non-terminals.
6038 Objects surrounded by double brackets '[[' ']]' are optional. Vertical
6039 bars '|' denote choices. Most grammar productions are implemented in
6040 functions called 'intel_<production>'.
6042 Initial production is 'expr'.
6048 binOp & | AND | \| | OR | ^ | XOR
6050 byteRegister AL | AH | BL | BH | CL | CH | DL | DH
6052 constant digits [[ radixOverride ]]
6054 dataType BYTE | WORD | DWORD | FWORD | QWORD | TBYTE | OWORD | XMMWORD
6092 => expr expr cmpOp e04
6095 gpRegister AX | EAX | BX | EBX | CX | ECX | DX | EDX
6096 | BP | EBP | SP | ESP | DI | EDI | SI | ESI
6098 hexdigit a | b | c | d | e | f
6099 | A | B | C | D | E | F
6105 mulOp * | / | % | MOD | << | SHL | >> | SHR
6109 register specialRegister
6113 segmentRegister CS | DS | ES | FS | GS | SS
6115 specialRegister CR0 | CR2 | CR3 | CR4
6116 | DR0 | DR1 | DR2 | DR3 | DR6 | DR7
6117 | TR3 | TR4 | TR5 | TR6 | TR7
6119 We simplify the grammar in obvious places (e.g., register parsing is
6120 done by calling parse_register) and eliminate immediate left recursion
6121 to implement a recursive-descent parser.
6125 expr' cmpOp e04 expr'
6176 /* Parsing structure for the intel syntax parser. Used to implement the
6177 semantic actions for the operand grammar. */
6178 struct intel_parser_s
6180 char *op_string; /* The string being parsed. */
6181 int got_a_float; /* Whether the operand is a float. */
6182 int op_modifier; /* Operand modifier. */
6183 int is_mem; /* 1 if operand is memory reference. */
6184 int in_offset; /* >=1 if parsing operand of offset. */
6185 int in_bracket; /* >=1 if parsing operand in brackets. */
6186 const reg_entry *reg; /* Last register reference found. */
6187 char *disp; /* Displacement string being built. */
6188 char *next_operand; /* Resume point when splitting operands. */
6191 static struct intel_parser_s intel_parser;
6193 /* Token structure for parsing intel syntax. */
6196 int code; /* Token code. */
6197 const reg_entry *reg; /* Register entry for register tokens. */
6198 char *str; /* String representation. */
6201 static struct intel_token cur_token, prev_token;
6203 /* Token codes for the intel parser. Since T_SHORT is already used
6204 by COFF, undefine it first to prevent a warning. */
6223 /* Prototypes for intel parser functions. */
6224 static int intel_match_token PARAMS ((int code));
6225 static void intel_get_token PARAMS ((void));
6226 static void intel_putback_token PARAMS ((void));
6227 static int intel_expr PARAMS ((void));
6228 static int intel_e04 PARAMS ((void));
6229 static int intel_e05 PARAMS ((void));
6230 static int intel_e06 PARAMS ((void));
6231 static int intel_e09 PARAMS ((void));
6232 static int intel_bracket_expr PARAMS ((void));
6233 static int intel_e10 PARAMS ((void));
6234 static int intel_e11 PARAMS ((void));
6237 i386_intel_operand (operand_string, got_a_float)
6238 char *operand_string;
6244 p = intel_parser.op_string = xstrdup (operand_string);
6245 intel_parser.disp = (char *) xmalloc (strlen (operand_string) + 1);
6249 /* Initialize token holders. */
6250 cur_token.code = prev_token.code = T_NIL;
6251 cur_token.reg = prev_token.reg = NULL;
6252 cur_token.str = prev_token.str = NULL;
6254 /* Initialize parser structure. */
6255 intel_parser.got_a_float = got_a_float;
6256 intel_parser.op_modifier = 0;
6257 intel_parser.is_mem = 0;
6258 intel_parser.in_offset = 0;
6259 intel_parser.in_bracket = 0;
6260 intel_parser.reg = NULL;
6261 intel_parser.disp[0] = '\0';
6262 intel_parser.next_operand = NULL;
6264 /* Read the first token and start the parser. */
6266 ret = intel_expr ();
6271 if (cur_token.code != T_NIL)
6273 as_bad (_("invalid operand for '%s' ('%s' unexpected)"),
6274 current_templates->start->name, cur_token.str);
6277 /* If we found a memory reference, hand it over to i386_displacement
6278 to fill in the rest of the operand fields. */
6279 else if (intel_parser.is_mem)
6281 if ((i.mem_operands == 1
6282 && (current_templates->start->opcode_modifier & IsString) == 0)
6283 || i.mem_operands == 2)
6285 as_bad (_("too many memory references for '%s'"),
6286 current_templates->start->name);
6291 char *s = intel_parser.disp;
6294 if (!quiet_warnings && intel_parser.is_mem < 0)
6295 /* See the comments in intel_bracket_expr. */
6296 as_warn (_("Treating `%s' as memory reference"), operand_string);
6298 /* Add the displacement expression. */
6300 ret = i386_displacement (s, s + strlen (s));
6303 /* Swap base and index in 16-bit memory operands like
6304 [si+bx]. Since i386_index_check is also used in AT&T
6305 mode we have to do that here. */
6308 && (i.base_reg->reg_type & Reg16)
6309 && (i.index_reg->reg_type & Reg16)
6310 && i.base_reg->reg_num >= 6
6311 && i.index_reg->reg_num < 6)
6313 const reg_entry *base = i.index_reg;
6315 i.index_reg = i.base_reg;
6318 ret = i386_index_check (operand_string);
6323 /* Constant and OFFSET expressions are handled by i386_immediate. */
6324 else if ((intel_parser.op_modifier & (1 << T_OFFSET))
6325 || intel_parser.reg == NULL)
6326 ret = i386_immediate (intel_parser.disp);
6328 if (intel_parser.next_operand && this_operand >= MAX_OPERANDS - 1)
6330 if (!ret || !intel_parser.next_operand)
6332 intel_parser.op_string = intel_parser.next_operand;
6333 this_operand = i.operands++;
6337 free (intel_parser.disp);
6342 #define NUM_ADDRESS_REGS (!!i.base_reg + !!i.index_reg)
6346 expr' cmpOp e04 expr'
6351 /* XXX Implement the comparison operators. */
6352 return intel_e04 ();
6369 if (nregs >= 0 && NUM_ADDRESS_REGS > nregs)
6370 i.base_reg = i386_regtab + REGNAM_AL; /* al is invalid as base */
6372 if (cur_token.code == '+')
6374 else if (cur_token.code == '-')
6375 nregs = NUM_ADDRESS_REGS;
6379 strcat (intel_parser.disp, cur_token.str);
6380 intel_match_token (cur_token.code);
6391 int nregs = ~NUM_ADDRESS_REGS;
6398 if (cur_token.code == '&' || cur_token.code == '|' || cur_token.code == '^')
6402 str[0] = cur_token.code;
6404 strcat (intel_parser.disp, str);
6409 intel_match_token (cur_token.code);
6414 if (nregs >= 0 && NUM_ADDRESS_REGS > nregs)
6415 i.base_reg = i386_regtab + REGNAM_AL + 1; /* cl is invalid as base */
6426 int nregs = ~NUM_ADDRESS_REGS;
6433 if (cur_token.code == '*' || cur_token.code == '/' || cur_token.code == '%')
6437 str[0] = cur_token.code;
6439 strcat (intel_parser.disp, str);
6441 else if (cur_token.code == T_SHL)
6442 strcat (intel_parser.disp, "<<");
6443 else if (cur_token.code == T_SHR)
6444 strcat (intel_parser.disp, ">>");
6448 intel_match_token (cur_token.code);
6453 if (nregs >= 0 && NUM_ADDRESS_REGS > nregs)
6454 i.base_reg = i386_regtab + REGNAM_AL + 2; /* dl is invalid as base */
6472 int nregs = ~NUM_ADDRESS_REGS;
6477 /* Don't consume constants here. */
6478 if (cur_token.code == '+' || cur_token.code == '-')
6480 /* Need to look one token ahead - if the next token
6481 is a constant, the current token is its sign. */
6484 intel_match_token (cur_token.code);
6485 next_code = cur_token.code;
6486 intel_putback_token ();
6487 if (next_code == T_CONST)
6491 /* e09 OFFSET e09 */
6492 if (cur_token.code == T_OFFSET)
6495 ++intel_parser.in_offset;
6499 else if (cur_token.code == T_SHORT)
6500 intel_parser.op_modifier |= 1 << T_SHORT;
6503 else if (cur_token.code == '+')
6504 strcat (intel_parser.disp, "+");
6509 else if (cur_token.code == '-' || cur_token.code == '~')
6515 str[0] = cur_token.code;
6517 strcat (intel_parser.disp, str);
6524 intel_match_token (cur_token.code);
6532 /* e09' PTR e10 e09' */
6533 if (cur_token.code == T_PTR)
6537 if (prev_token.code == T_BYTE)
6538 suffix = BYTE_MNEM_SUFFIX;
6540 else if (prev_token.code == T_WORD)
6542 if (current_templates->start->name[0] == 'l'
6543 && current_templates->start->name[2] == 's'
6544 && current_templates->start->name[3] == 0)
6545 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
6546 else if (intel_parser.got_a_float == 2) /* "fi..." */
6547 suffix = SHORT_MNEM_SUFFIX;
6549 suffix = WORD_MNEM_SUFFIX;
6552 else if (prev_token.code == T_DWORD)
6554 if (current_templates->start->name[0] == 'l'
6555 && current_templates->start->name[2] == 's'
6556 && current_templates->start->name[3] == 0)
6557 suffix = WORD_MNEM_SUFFIX;
6558 else if (flag_code == CODE_16BIT
6559 && (current_templates->start->opcode_modifier
6560 & (Jump | JumpDword)))
6561 suffix = LONG_DOUBLE_MNEM_SUFFIX;
6562 else if (intel_parser.got_a_float == 1) /* "f..." */
6563 suffix = SHORT_MNEM_SUFFIX;
6565 suffix = LONG_MNEM_SUFFIX;
6568 else if (prev_token.code == T_FWORD)
6570 if (current_templates->start->name[0] == 'l'
6571 && current_templates->start->name[2] == 's'
6572 && current_templates->start->name[3] == 0)
6573 suffix = LONG_MNEM_SUFFIX;
6574 else if (!intel_parser.got_a_float)
6576 if (flag_code == CODE_16BIT)
6577 add_prefix (DATA_PREFIX_OPCODE);
6578 suffix = LONG_DOUBLE_MNEM_SUFFIX;
6581 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
6584 else if (prev_token.code == T_QWORD)
6586 if (intel_parser.got_a_float == 1) /* "f..." */
6587 suffix = LONG_MNEM_SUFFIX;
6589 suffix = QWORD_MNEM_SUFFIX;
6592 else if (prev_token.code == T_TBYTE)
6594 if (intel_parser.got_a_float == 1)
6595 suffix = LONG_DOUBLE_MNEM_SUFFIX;
6597 suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */
6600 else if (prev_token.code == T_XMMWORD)
6602 /* XXX ignored for now, but accepted since gcc uses it */
6608 as_bad (_("Unknown operand modifier `%s'"), prev_token.str);
6612 /* Operands for jump/call using 'ptr' notation denote absolute
6614 if (current_templates->start->opcode_modifier & (Jump | JumpDword))
6615 i.types[this_operand] |= JumpAbsolute;
6617 if (current_templates->start->base_opcode == 0x8d /* lea */)
6621 else if (i.suffix != suffix)
6623 as_bad (_("Conflicting operand modifiers"));
6629 /* e09' : e10 e09' */
6630 else if (cur_token.code == ':')
6632 if (prev_token.code != T_REG)
6634 /* While {call,jmp} SSSS:OOOO is MASM syntax only when SSSS is a
6635 segment/group identifier (which we don't have), using comma
6636 as the operand separator there is even less consistent, since
6637 there all branches only have a single operand. */
6638 if (this_operand != 0
6639 || intel_parser.in_offset
6640 || intel_parser.in_bracket
6641 || (!(current_templates->start->opcode_modifier
6642 & (Jump|JumpDword|JumpInterSegment))
6643 && !(current_templates->start->operand_types[0]
6645 return intel_match_token (T_NIL);
6646 /* Remember the start of the 2nd operand and terminate 1st
6648 XXX This isn't right, yet (when SSSS:OOOO is right operand of
6649 another expression), but it gets at least the simplest case
6650 (a plain number or symbol on the left side) right. */
6651 intel_parser.next_operand = intel_parser.op_string;
6652 *--intel_parser.op_string = '\0';
6653 return intel_match_token (':');
6661 intel_match_token (cur_token.code);
6667 --intel_parser.in_offset;
6670 if (NUM_ADDRESS_REGS > nregs)
6672 as_bad (_("Invalid operand to `OFFSET'"));
6675 intel_parser.op_modifier |= 1 << T_OFFSET;
6678 if (nregs >= 0 && NUM_ADDRESS_REGS > nregs)
6679 i.base_reg = i386_regtab + REGNAM_AL + 3; /* bl is invalid as base */
6684 intel_bracket_expr ()
6686 int was_offset = intel_parser.op_modifier & (1 << T_OFFSET);
6687 const char *start = intel_parser.op_string;
6690 if (i.op[this_operand].regs)
6691 return intel_match_token (T_NIL);
6693 intel_match_token ('[');
6695 /* Mark as a memory operand only if it's not already known to be an
6696 offset expression. If it's an offset expression, we need to keep
6698 if (!intel_parser.in_offset)
6700 ++intel_parser.in_bracket;
6702 /* Operands for jump/call inside brackets denote absolute addresses. */
6703 if (current_templates->start->opcode_modifier & (Jump | JumpDword))
6704 i.types[this_operand] |= JumpAbsolute;
6706 /* Unfortunately gas always diverged from MASM in a respect that can't
6707 be easily fixed without risking to break code sequences likely to be
6708 encountered (the testsuite even check for this): MASM doesn't consider
6709 an expression inside brackets unconditionally as a memory reference.
6710 When that is e.g. a constant, an offset expression, or the sum of the
6711 two, this is still taken as a constant load. gas, however, always
6712 treated these as memory references. As a compromise, we'll try to make
6713 offset expressions inside brackets work the MASM way (since that's
6714 less likely to be found in real world code), but make constants alone
6715 continue to work the traditional gas way. In either case, issue a
6717 intel_parser.op_modifier &= ~was_offset;
6720 strcat (intel_parser.disp, "[");
6722 /* Add a '+' to the displacement string if necessary. */
6723 if (*intel_parser.disp != '\0'
6724 && *(intel_parser.disp + strlen (intel_parser.disp) - 1) != '+')
6725 strcat (intel_parser.disp, "+");
6728 && (len = intel_parser.op_string - start - 1,
6729 intel_match_token (']')))
6731 /* Preserve brackets when the operand is an offset expression. */
6732 if (intel_parser.in_offset)
6733 strcat (intel_parser.disp, "]");
6736 --intel_parser.in_bracket;
6737 if (i.base_reg || i.index_reg)
6738 intel_parser.is_mem = 1;
6739 if (!intel_parser.is_mem)
6741 if (!(intel_parser.op_modifier & (1 << T_OFFSET)))
6742 /* Defer the warning until all of the operand was parsed. */
6743 intel_parser.is_mem = -1;
6744 else if (!quiet_warnings)
6745 as_warn (_("`[%.*s]' taken to mean just `%.*s'"), len, start, len, start);
6748 intel_parser.op_modifier |= was_offset;
6765 while (cur_token.code == '[')
6767 if (!intel_bracket_expr ())
6792 switch (cur_token.code)
6796 intel_match_token ('(');
6797 strcat (intel_parser.disp, "(");
6799 if (intel_expr () && intel_match_token (')'))
6801 strcat (intel_parser.disp, ")");
6808 return intel_bracket_expr ();
6813 strcat (intel_parser.disp, cur_token.str);
6814 intel_match_token (cur_token.code);
6816 /* Mark as a memory operand only if it's not already known to be an
6817 offset expression. */
6818 if (!intel_parser.in_offset)
6819 intel_parser.is_mem = 1;
6826 const reg_entry *reg = intel_parser.reg = cur_token.reg;
6828 intel_match_token (T_REG);
6830 /* Check for segment change. */
6831 if (cur_token.code == ':')
6833 if (!(reg->reg_type & (SReg2 | SReg3)))
6835 as_bad (_("`%s' is not a valid segment register"), reg->reg_name);
6838 else if (i.seg[i.mem_operands])
6839 as_warn (_("Extra segment override ignored"));
6842 if (!intel_parser.in_offset)
6843 intel_parser.is_mem = 1;
6844 switch (reg->reg_num)
6847 i.seg[i.mem_operands] = &es;
6850 i.seg[i.mem_operands] = &cs;
6853 i.seg[i.mem_operands] = &ss;
6856 i.seg[i.mem_operands] = &ds;
6859 i.seg[i.mem_operands] = &fs;
6862 i.seg[i.mem_operands] = &gs;
6868 /* Not a segment register. Check for register scaling. */
6869 else if (cur_token.code == '*')
6871 if (!intel_parser.in_bracket)
6873 as_bad (_("Register scaling only allowed in memory operands"));
6877 if (reg->reg_type & Reg16) /* Disallow things like [si*1]. */
6878 reg = i386_regtab + REGNAM_AX + 4; /* sp is invalid as index */
6879 else if (i.index_reg)
6880 reg = i386_regtab + REGNAM_EAX + 4; /* esp is invalid as index */
6882 /* What follows must be a valid scale. */
6883 intel_match_token ('*');
6885 i.types[this_operand] |= BaseIndex;
6887 /* Set the scale after setting the register (otherwise,
6888 i386_scale will complain) */
6889 if (cur_token.code == '+' || cur_token.code == '-')
6891 char *str, sign = cur_token.code;
6892 intel_match_token (cur_token.code);
6893 if (cur_token.code != T_CONST)
6895 as_bad (_("Syntax error: Expecting a constant, got `%s'"),
6899 str = (char *) xmalloc (strlen (cur_token.str) + 2);
6900 strcpy (str + 1, cur_token.str);
6902 if (!i386_scale (str))
6906 else if (!i386_scale (cur_token.str))
6908 intel_match_token (cur_token.code);
6911 /* No scaling. If this is a memory operand, the register is either a
6912 base register (first occurrence) or an index register (second
6914 else if (intel_parser.in_bracket)
6919 else if (!i.index_reg)
6923 as_bad (_("Too many register references in memory operand"));
6927 i.types[this_operand] |= BaseIndex;
6930 /* It's neither base nor index. */
6931 else if (!intel_parser.in_offset && !intel_parser.is_mem)
6933 i.types[this_operand] |= reg->reg_type & ~BaseIndex;
6934 i.op[this_operand].regs = reg;
6939 as_bad (_("Invalid use of register"));
6943 /* Since registers are not part of the displacement string (except
6944 when we're parsing offset operands), we may need to remove any
6945 preceding '+' from the displacement string. */
6946 if (*intel_parser.disp != '\0'
6947 && !intel_parser.in_offset)
6949 char *s = intel_parser.disp;
6950 s += strlen (s) - 1;
6973 intel_match_token (cur_token.code);
6975 if (cur_token.code == T_PTR)
6978 /* It must have been an identifier. */
6979 intel_putback_token ();
6980 cur_token.code = T_ID;
6986 if (!intel_parser.in_offset && intel_parser.is_mem <= 0)
6990 /* The identifier represents a memory reference only if it's not
6991 preceded by an offset modifier and if it's not an equate. */
6992 symbolP = symbol_find(cur_token.str);
6993 if (!symbolP || S_GET_SEGMENT(symbolP) != absolute_section)
6994 intel_parser.is_mem = 1;
7002 char *save_str, sign = 0;
7004 /* Allow constants that start with `+' or `-'. */
7005 if (cur_token.code == '-' || cur_token.code == '+')
7007 sign = cur_token.code;
7008 intel_match_token (cur_token.code);
7009 if (cur_token.code != T_CONST)
7011 as_bad (_("Syntax error: Expecting a constant, got `%s'"),
7017 save_str = (char *) xmalloc (strlen (cur_token.str) + 2);
7018 strcpy (save_str + !!sign, cur_token.str);
7022 /* Get the next token to check for register scaling. */
7023 intel_match_token (cur_token.code);
7025 /* Check if this constant is a scaling factor for an index register. */
7026 if (cur_token.code == '*')
7028 if (intel_match_token ('*') && cur_token.code == T_REG)
7030 const reg_entry *reg = cur_token.reg;
7032 if (!intel_parser.in_bracket)
7034 as_bad (_("Register scaling only allowed in memory operands"));
7038 if (reg->reg_type & Reg16) /* Disallow things like [1*si]. */
7039 reg = i386_regtab + REGNAM_AX + 4; /* sp is invalid as index */
7040 else if (i.index_reg)
7041 reg = i386_regtab + REGNAM_EAX + 4; /* esp is invalid as index */
7043 /* The constant is followed by `* reg', so it must be
7046 i.types[this_operand] |= BaseIndex;
7048 /* Set the scale after setting the register (otherwise,
7049 i386_scale will complain) */
7050 if (!i386_scale (save_str))
7052 intel_match_token (T_REG);
7054 /* Since registers are not part of the displacement
7055 string, we may need to remove any preceding '+' from
7056 the displacement string. */
7057 if (*intel_parser.disp != '\0')
7059 char *s = intel_parser.disp;
7060 s += strlen (s) - 1;
7070 /* The constant was not used for register scaling. Since we have
7071 already consumed the token following `*' we now need to put it
7072 back in the stream. */
7073 intel_putback_token ();
7076 /* Add the constant to the displacement string. */
7077 strcat (intel_parser.disp, save_str);
7084 as_bad (_("Unrecognized token '%s'"), cur_token.str);
7088 /* Match the given token against cur_token. If they match, read the next
7089 token from the operand string. */
7091 intel_match_token (code)
7094 if (cur_token.code == code)
7101 as_bad (_("Unexpected token `%s'"), cur_token.str);
7106 /* Read a new token from intel_parser.op_string and store it in cur_token. */
7111 const reg_entry *reg;
7112 struct intel_token new_token;
7114 new_token.code = T_NIL;
7115 new_token.reg = NULL;
7116 new_token.str = NULL;
7118 /* Free the memory allocated to the previous token and move
7119 cur_token to prev_token. */
7121 free (prev_token.str);
7123 prev_token = cur_token;
7125 /* Skip whitespace. */
7126 while (is_space_char (*intel_parser.op_string))
7127 intel_parser.op_string++;
7129 /* Return an empty token if we find nothing else on the line. */
7130 if (*intel_parser.op_string == '\0')
7132 cur_token = new_token;
7136 /* The new token cannot be larger than the remainder of the operand
7138 new_token.str = (char *) xmalloc (strlen (intel_parser.op_string) + 1);
7139 new_token.str[0] = '\0';
7141 if (strchr ("0123456789", *intel_parser.op_string))
7143 char *p = new_token.str;
7144 char *q = intel_parser.op_string;
7145 new_token.code = T_CONST;
7147 /* Allow any kind of identifier char to encompass floating point and
7148 hexadecimal numbers. */
7149 while (is_identifier_char (*q))
7153 /* Recognize special symbol names [0-9][bf]. */
7154 if (strlen (intel_parser.op_string) == 2
7155 && (intel_parser.op_string[1] == 'b'
7156 || intel_parser.op_string[1] == 'f'))
7157 new_token.code = T_ID;
7160 else if ((reg = parse_register (intel_parser.op_string, &end_op)) != NULL)
7162 size_t len = end_op - intel_parser.op_string;
7164 new_token.code = T_REG;
7165 new_token.reg = reg;
7167 memcpy (new_token.str, intel_parser.op_string, len);
7168 new_token.str[len] = '\0';
7171 else if (is_identifier_char (*intel_parser.op_string))
7173 char *p = new_token.str;
7174 char *q = intel_parser.op_string;
7176 /* A '.' or '$' followed by an identifier char is an identifier.
7177 Otherwise, it's operator '.' followed by an expression. */
7178 if ((*q == '.' || *q == '$') && !is_identifier_char (*(q + 1)))
7180 new_token.code = '.';
7181 new_token.str[0] = '.';
7182 new_token.str[1] = '\0';
7186 while (is_identifier_char (*q) || *q == '@')
7190 if (strcasecmp (new_token.str, "NOT") == 0)
7191 new_token.code = '~';
7193 else if (strcasecmp (new_token.str, "MOD") == 0)
7194 new_token.code = '%';
7196 else if (strcasecmp (new_token.str, "AND") == 0)
7197 new_token.code = '&';
7199 else if (strcasecmp (new_token.str, "OR") == 0)
7200 new_token.code = '|';
7202 else if (strcasecmp (new_token.str, "XOR") == 0)
7203 new_token.code = '^';
7205 else if (strcasecmp (new_token.str, "SHL") == 0)
7206 new_token.code = T_SHL;
7208 else if (strcasecmp (new_token.str, "SHR") == 0)
7209 new_token.code = T_SHR;
7211 else if (strcasecmp (new_token.str, "BYTE") == 0)
7212 new_token.code = T_BYTE;
7214 else if (strcasecmp (new_token.str, "WORD") == 0)
7215 new_token.code = T_WORD;
7217 else if (strcasecmp (new_token.str, "DWORD") == 0)
7218 new_token.code = T_DWORD;
7220 else if (strcasecmp (new_token.str, "FWORD") == 0)
7221 new_token.code = T_FWORD;
7223 else if (strcasecmp (new_token.str, "QWORD") == 0)
7224 new_token.code = T_QWORD;
7226 else if (strcasecmp (new_token.str, "TBYTE") == 0
7227 /* XXX remove (gcc still uses it) */
7228 || strcasecmp (new_token.str, "XWORD") == 0)
7229 new_token.code = T_TBYTE;
7231 else if (strcasecmp (new_token.str, "XMMWORD") == 0
7232 || strcasecmp (new_token.str, "OWORD") == 0)
7233 new_token.code = T_XMMWORD;
7235 else if (strcasecmp (new_token.str, "PTR") == 0)
7236 new_token.code = T_PTR;
7238 else if (strcasecmp (new_token.str, "SHORT") == 0)
7239 new_token.code = T_SHORT;
7241 else if (strcasecmp (new_token.str, "OFFSET") == 0)
7243 new_token.code = T_OFFSET;
7245 /* ??? This is not mentioned in the MASM grammar but gcc
7246 makes use of it with -mintel-syntax. OFFSET may be
7247 followed by FLAT: */
7248 if (strncasecmp (q, " FLAT:", 6) == 0)
7249 strcat (new_token.str, " FLAT:");
7252 /* ??? This is not mentioned in the MASM grammar. */
7253 else if (strcasecmp (new_token.str, "FLAT") == 0)
7255 new_token.code = T_OFFSET;
7257 strcat (new_token.str, ":");
7259 as_bad (_("`:' expected"));
7263 new_token.code = T_ID;
7267 else if (strchr ("+-/*%|&^:[]()~", *intel_parser.op_string))
7269 new_token.code = *intel_parser.op_string;
7270 new_token.str[0] = *intel_parser.op_string;
7271 new_token.str[1] = '\0';
7274 else if (strchr ("<>", *intel_parser.op_string)
7275 && *intel_parser.op_string == *(intel_parser.op_string + 1))
7277 new_token.code = *intel_parser.op_string == '<' ? T_SHL : T_SHR;
7278 new_token.str[0] = *intel_parser.op_string;
7279 new_token.str[1] = *intel_parser.op_string;
7280 new_token.str[2] = '\0';
7284 as_bad (_("Unrecognized token `%s'"), intel_parser.op_string);
7286 intel_parser.op_string += strlen (new_token.str);
7287 cur_token = new_token;
7290 /* Put cur_token back into the token stream and make cur_token point to
7293 intel_putback_token ()
7295 if (cur_token.code != T_NIL)
7297 intel_parser.op_string -= strlen (cur_token.str);
7298 free (cur_token.str);
7300 cur_token = prev_token;
7302 /* Forget prev_token. */
7303 prev_token.code = T_NIL;
7304 prev_token.reg = NULL;
7305 prev_token.str = NULL;
7309 tc_x86_regname_to_dw2regnum (char *regname)
7311 unsigned int regnum;
7312 unsigned int regnames_count;
7313 static const char *const regnames_32[] =
7315 "eax", "ecx", "edx", "ebx",
7316 "esp", "ebp", "esi", "edi",
7317 "eip", "eflags", NULL,
7318 "st0", "st1", "st2", "st3",
7319 "st4", "st5", "st6", "st7",
7321 "xmm0", "xmm1", "xmm2", "xmm3",
7322 "xmm4", "xmm5", "xmm6", "xmm7",
7323 "mm0", "mm1", "mm2", "mm3",
7324 "mm4", "mm5", "mm6", "mm7",
7325 "fcw", "fsw", "mxcsr",
7326 "es", "cs", "ss", "ds", "fs", "gs", NULL, NULL,
7329 static const char *const regnames_64[] =
7331 "rax", "rdx", "rcx", "rbx",
7332 "rsi", "rdi", "rbp", "rsp",
7333 "r8", "r9", "r10", "r11",
7334 "r12", "r13", "r14", "r15",
7336 "xmm0", "xmm1", "xmm2", "xmm3",
7337 "xmm4", "xmm5", "xmm6", "xmm7",
7338 "xmm8", "xmm9", "xmm10", "xmm11",
7339 "xmm12", "xmm13", "xmm14", "xmm15",
7340 "st0", "st1", "st2", "st3",
7341 "st4", "st5", "st6", "st7",
7342 "mm0", "mm1", "mm2", "mm3",
7343 "mm4", "mm5", "mm6", "mm7",
7345 "es", "cs", "ss", "ds", "fs", "gs", NULL, NULL,
7346 "fs.base", "gs.base", NULL, NULL,
7348 "mxcsr", "fcw", "fsw"
7350 const char *const *regnames;
7352 if (flag_code == CODE_64BIT)
7354 regnames = regnames_64;
7355 regnames_count = ARRAY_SIZE (regnames_64);
7359 regnames = regnames_32;
7360 regnames_count = ARRAY_SIZE (regnames_32);
7363 for (regnum = 0; regnum < regnames_count; regnum++)
7364 if (regnames[regnum] != NULL
7365 && strcmp (regname, regnames[regnum]) == 0)
7372 tc_x86_frame_initial_instructions (void)
7374 static unsigned int sp_regno;
7377 sp_regno = tc_x86_regname_to_dw2regnum (flag_code == CODE_64BIT
7380 cfi_add_CFA_def_cfa (sp_regno, -x86_cie_data_alignment);
7381 cfi_add_CFA_offset (x86_dwarf2_return_column, x86_cie_data_alignment);
7385 i386_elf_section_type (const char *str, size_t len)
7387 if (flag_code == CODE_64BIT
7388 && len == sizeof ("unwind") - 1
7389 && strncmp (str, "unwind", 6) == 0)
7390 return SHT_X86_64_UNWIND;
7397 tc_pe_dwarf2_emit_offset (symbolS *symbol, unsigned int size)
7401 expr.X_op = O_secrel;
7402 expr.X_add_symbol = symbol;
7403 expr.X_add_number = 0;
7404 emit_expr (&expr, size);
7408 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
7409 /* For ELF on x86-64, add support for SHF_X86_64_LARGE. */
7412 x86_64_section_letter (int letter, char **ptr_msg)
7414 if (flag_code == CODE_64BIT)
7417 return SHF_X86_64_LARGE;
7419 *ptr_msg = _("Bad .section directive: want a,l,w,x,M,S,G,T in string");
7422 *ptr_msg = _("Bad .section directive: want a,w,x,M,S,G,T in string");
7427 x86_64_section_word (char *str, size_t len)
7429 if (len == 5 && flag_code == CODE_64BIT && strncmp (str, "large", 5) == 0)
7430 return SHF_X86_64_LARGE;
7436 handle_large_common (int small ATTRIBUTE_UNUSED)
7438 if (flag_code != CODE_64BIT)
7440 s_comm_internal (0, elf_common_parse);
7441 as_warn (_(".largecomm supported only in 64bit mode, producing .comm"));
7445 static segT lbss_section;
7446 asection *saved_com_section_ptr = elf_com_section_ptr;
7447 asection *saved_bss_section = bss_section;
7449 if (lbss_section == NULL)
7451 flagword applicable;
7453 subsegT subseg = now_subseg;
7455 /* The .lbss section is for local .largecomm symbols. */
7456 lbss_section = subseg_new (".lbss", 0);
7457 applicable = bfd_applicable_section_flags (stdoutput);
7458 bfd_set_section_flags (stdoutput, lbss_section,
7459 applicable & SEC_ALLOC);
7460 seg_info (lbss_section)->bss = 1;
7462 subseg_set (seg, subseg);
7465 elf_com_section_ptr = &_bfd_elf_large_com_section;
7466 bss_section = lbss_section;
7468 s_comm_internal (0, elf_common_parse);
7470 elf_com_section_ptr = saved_com_section_ptr;
7471 bss_section = saved_bss_section;
7474 #endif /* OBJ_ELF || OBJ_MAYBE_ELF */