gas/config/tc-i386.h

   1 /* tc-i386.h -- Header file for tc-i386.c
   2    Copyright 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2004, 2005, 2006, 2007
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GAS, the GNU Assembler.
   7
   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)
  11    any later version.
  12
  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.
  17
  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
  21    02110-1301, USA.  */
  22
  23 #ifndef TC_I386
  24 #define TC_I386 1
  25
  26 struct fix;
  27
  28 #define TARGET_BYTES_BIG_ENDIAN 0
  29
  30 #define TARGET_ARCH             bfd_arch_i386
  31 #define TARGET_MACH             (i386_mach ())
  32 extern unsigned long i386_mach (void);
  33
  34 #ifdef TE_FreeBSD
  35 #define AOUT_TARGET_FORMAT      "a.out-i386-freebsd"
  36 #endif
  37 #ifdef TE_NetBSD
  38 #define AOUT_TARGET_FORMAT      "a.out-i386-netbsd"
  39 #endif
  40 #ifdef TE_386BSD
  41 #define AOUT_TARGET_FORMAT      "a.out-i386-bsd"
  42 #endif
  43 #ifdef TE_LINUX
  44 #define AOUT_TARGET_FORMAT      "a.out-i386-linux"
  45 #endif
  46 #ifdef TE_Mach
  47 #define AOUT_TARGET_FORMAT      "a.out-mach3"
  48 #endif
  49 #ifdef TE_DYNIX
  50 #define AOUT_TARGET_FORMAT      "a.out-i386-dynix"
  51 #endif
  52 #ifndef AOUT_TARGET_FORMAT
  53 #define AOUT_TARGET_FORMAT      "a.out-i386"
  54 #endif
  55
  56 #ifdef TE_FreeBSD
  57 #define ELF_TARGET_FORMAT       "elf32-i386-freebsd"
  58 #define ELF_TARGET_FORMAT64     "elf64-x86-64-freebsd"
  59 #elif defined (TE_VXWORKS)
  60 #define ELF_TARGET_FORMAT       "elf32-i386-vxworks"
  61 #endif
  62
  63 #ifndef ELF_TARGET_FORMAT
  64 #define ELF_TARGET_FORMAT       "elf32-i386"
  65 #endif
  66
  67 #ifndef ELF_TARGET_FORMAT64
  68 #define ELF_TARGET_FORMAT64     "elf64-x86-64"
  69 #endif
  70
  71 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
  72      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF))
  73 extern const char *i386_target_format (void);
  74 #define TARGET_FORMAT i386_target_format ()
  75 #else
  76 #ifdef OBJ_ELF
  77 #define TARGET_FORMAT           ELF_TARGET_FORMAT
  78 #endif
  79 #ifdef OBJ_AOUT
  80 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
  81 #endif
  82 #endif
  83
  84 #if (defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF))
  85 #define md_end i386_elf_emit_arch_note
  86 extern void i386_elf_emit_arch_note (void);
  87 #endif
  88
  89 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
  90
  91 #define LOCAL_LABELS_FB 1
  92
  93 extern const char extra_symbol_chars[];
  94 #define tc_symbol_chars extra_symbol_chars
  95
  96 extern const char *i386_comment_chars;
  97 #define tc_comment_chars i386_comment_chars
  98
  99 /* Prefixes will be emitted in the order defined below.
 100    WAIT_PREFIX must be the first prefix since FWAIT is really is an
 101    instruction, and so must come before any prefixes.
 102    The preferred prefix order is SEG_PREFIX, ADDR_PREFIX, DATA_PREFIX,
 103    LOCKREP_PREFIX.  */
 104 #define WAIT_PREFIX     0
 105 #define SEG_PREFIX      1
 106 #define ADDR_PREFIX     2
 107 #define DATA_PREFIX     3
 108 #define LOCKREP_PREFIX  4
 109 #define REX_PREFIX      5       /* must come last.  */
 110 #define MAX_PREFIXES    6       /* max prefixes per opcode */
 111
 112 /* we define the syntax here (modulo base,index,scale syntax) */
 113 #define REGISTER_PREFIX '%'
 114 #define IMMEDIATE_PREFIX '$'
 115 #define ABSOLUTE_PREFIX '*'
 116
 117 /* Byte to use for filling in frag_align_code.  */
 118 #define NOP_OPCODE (char) 0x90
 119
 120 /* these are the instruction mnemonic suffixes.  */
 121 #define WORD_MNEM_SUFFIX  'w'
 122 #define BYTE_MNEM_SUFFIX  'b'
 123 #define SHORT_MNEM_SUFFIX 's'
 124 #define LONG_MNEM_SUFFIX  'l'
 125 #define QWORD_MNEM_SUFFIX  'q'
 126 /* Intel Syntax */
 127 #define LONG_DOUBLE_MNEM_SUFFIX 'x'
 128
 129 #define END_OF_INSN '\0'
 130
 131 /*
 132   'templates' is for grouping together 'template' structures for opcodes
 133   of the same name.  This is only used for storing the insns in the grand
 134   ole hash table of insns.
 135   The templates themselves start at START and range up to (but not including)
 136   END.
 137   */
 138 struct template;
 139
 140 typedef struct
 141 {
 142   const struct template *start;
 143   const struct template *end;
 144 }
 145 templates;
 146
 147 /* 386 operand encoding bytes:  see 386 book for details of this.  */
 148 typedef struct
 149 {
 150   unsigned int regmem;  /* codes register or memory operand */
 151   unsigned int reg;     /* codes register operand (or extended opcode) */
 152   unsigned int mode;    /* how to interpret regmem & reg */
 153 }
 154 modrm_byte;
 155
 156 /* x86-64 extension prefix.  */
 157 typedef int rex_byte;
 158
 159 /* 386 opcode byte to code indirect addressing.  */
 160 typedef struct
 161 {
 162   unsigned base;
 163   unsigned index;
 164   unsigned scale;
 165 }
 166 sib_byte;
 167
 168 enum processor_type
 169 {
 170   PROCESSOR_UNKNOWN,
 171   PROCESSOR_I486,
 172   PROCESSOR_PENTIUM,
 173   PROCESSOR_PENTIUMPRO,
 174   PROCESSOR_PENTIUM4,
 175   PROCESSOR_NOCONA,
 176   PROCESSOR_CORE,
 177   PROCESSOR_CORE2,
 178   PROCESSOR_K6,
 179   PROCESSOR_ATHLON,
 180   PROCESSOR_K8,
 181   PROCESSOR_GENERIC32,
 182   PROCESSOR_GENERIC64,
 183   PROCESSOR_AMDFAM10
 184 };
 185
 186 /* x86 arch names, types and features */
 187 typedef struct
 188 {
 189   const char *name;             /* arch name */
 190   enum processor_type type;     /* arch type */
 191   unsigned int flags;           /* cpu feature flags */
 192 }
 193 arch_entry;
 194
 195 /* The name of the global offset table generated by the compiler. Allow
 196    this to be overridden if need be.  */
 197 #ifndef GLOBAL_OFFSET_TABLE_NAME
 198 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 199 #endif
 200
 201 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 202 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 203 extern void x86_cons (expressionS *, int);
 204 #endif
 205
 206 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) x86_cons_fix_new(FRAG, OFF, LEN, EXP)
 207 extern void x86_cons_fix_new
 208   (fragS *, unsigned int, unsigned int, expressionS *);
 209
 210 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 211
 212 #define NO_RELOC BFD_RELOC_NONE
 213
 214 void i386_validate_fix (struct fix *);
 215 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 216
 217 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 218 extern int tc_i386_fix_adjustable (struct fix *);
 219
 220 /* Values passed to md_apply_fix don't include the symbol value.  */
 221 #define MD_APPLY_SYM_VALUE(FIX) 0
 222
 223 /* ELF wants external syms kept, as does PE COFF.  */
 224 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 225 #define EXTERN_FORCE_RELOC                              \
 226   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 227    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 228 #else
 229 #define EXTERN_FORCE_RELOC                              \
 230   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 231 #endif
 232
 233 /* This expression evaluates to true if the relocation is for a local
 234    object for which we still want to do the relocation at runtime.
 235    False if we are willing to perform this relocation while building
 236    the .o file.  GOTOFF does not need to be checked here because it is
 237    not pcrel.  I am not sure if some of the others are ever used with
 238    pcrel, but it is easier to be safe than sorry.  */
 239
 240 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 241   (!(FIX)->fx_pcrel                                     \
 242    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32           \
 243    || (FIX)->fx_r_type == BFD_RELOC_386_GOT32           \
 244    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC           \
 245    || TC_FORCE_RELOCATION (FIX))
 246
 247 extern int i386_parse_name (char *, expressionS *, char *);
 248 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 249
 250 extern const struct relax_type md_relax_table[];
 251 #define TC_GENERIC_RELAX_TABLE md_relax_table
 252
 253 extern int optimize_align_code;
 254
 255 #define md_do_align(n, fill, len, max, around)                          \
 256 if ((n)                                                                 \
 257     && !need_pass_2                                                     \
 258     && optimize_align_code                                              \
 259     && (!(fill)                                                         \
 260         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 261     && subseg_text_p (now_seg))                                         \
 262   {                                                                     \
 263     frag_align_code ((n), (max));                                       \
 264     goto around;                                                        \
 265   }
 266
 267 #define MAX_MEM_FOR_RS_ALIGN_CODE  15
 268
 269 extern void i386_align_code (fragS *, int);
 270
 271 #define HANDLE_ALIGN(fragP)                                             \
 272 if (fragP->fr_type == rs_align_code)                                    \
 273   i386_align_code (fragP, (fragP->fr_next->fr_address                   \
 274                            - fragP->fr_address                          \
 275                            - fragP->fr_fix));
 276
 277 void i386_print_statistics (FILE *);
 278 #define tc_print_statistics i386_print_statistics
 279
 280 #define md_number_to_chars number_to_chars_littleendian
 281
 282 #ifdef SCO_ELF
 283 #define tc_init_after_args() sco_id ()
 284 extern void sco_id (void);
 285 #endif
 286
 287 #define WORKING_DOT_WORD 1
 288
 289 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 290 #define TARGET_USE_CFIPOP 1
 291
 292 extern unsigned int x86_dwarf2_return_column;
 293 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 294
 295 extern int x86_cie_data_alignment;
 296 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 297
 298 #define tc_regname_to_dw2regnum tc_x86_regname_to_dw2regnum
 299 extern int tc_x86_regname_to_dw2regnum (char *);
 300
 301 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 302 extern void tc_x86_frame_initial_instructions (void);
 303
 304 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 305 extern int i386_elf_section_type (const char *, size_t);
 306
 307 /* Support for SHF_X86_64_LARGE */
 308 extern int x86_64_section_word (char *, size_t);
 309 extern int x86_64_section_letter (int, char **);
 310 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 311 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 312
 313 #ifdef TE_PE
 314
 315 #define O_secrel O_md1
 316
 317 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 318 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 319
 320 #endif /* TE_PE */
 321
 322 #endif /* TC_I386 */