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, 2008, 2009
   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 3, 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 #include "opcodes/i386-opc.h"
  27
  28 struct fix;
  29
  30 #define TARGET_BYTES_BIG_ENDIAN 0
  31
  32 #define TARGET_ARCH             (i386_arch ())
  33 #define TARGET_MACH             (i386_mach ())
  34 extern enum bfd_architecture i386_arch (void);
  35 extern unsigned long i386_mach (void);
  36
  37 #ifdef TE_FreeBSD
  38 #define AOUT_TARGET_FORMAT      "a.out-i386-freebsd"
  39 #endif
  40 #ifdef TE_NetBSD
  41 #define AOUT_TARGET_FORMAT      "a.out-i386-netbsd"
  42 #endif
  43 #ifdef TE_386BSD
  44 #define AOUT_TARGET_FORMAT      "a.out-i386-bsd"
  45 #endif
  46 #ifdef TE_LINUX
  47 #define AOUT_TARGET_FORMAT      "a.out-i386-linux"
  48 #endif
  49 #ifdef TE_Mach
  50 #define AOUT_TARGET_FORMAT      "a.out-mach3"
  51 #endif
  52 #ifdef TE_DYNIX
  53 #define AOUT_TARGET_FORMAT      "a.out-i386-dynix"
  54 #endif
  55 #ifndef AOUT_TARGET_FORMAT
  56 #define AOUT_TARGET_FORMAT      "a.out-i386"
  57 #endif
  58
  59 #ifdef TE_FreeBSD
  60 #define ELF_TARGET_FORMAT       "elf32-i386-freebsd"
  61 #define ELF_TARGET_FORMAT64     "elf64-x86-64-freebsd"
  62 #elif defined (TE_VXWORKS)
  63 #define ELF_TARGET_FORMAT       "elf32-i386-vxworks"
  64 #endif
  65
  66 #ifndef ELF_TARGET_FORMAT
  67 #define ELF_TARGET_FORMAT       "elf32-i386"
  68 #endif
  69
  70 #ifndef ELF_TARGET_FORMAT64
  71 #define ELF_TARGET_FORMAT64     "elf64-x86-64"
  72 #endif
  73
  74 #ifndef ELF_TARGET_L1OM_FORMAT
  75 #define ELF_TARGET_L1OM_FORMAT  "elf64-l1om"
  76 #endif
  77
  78 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
  79      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
  80      || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
  81 extern const char *i386_target_format (void);
  82 #define TARGET_FORMAT i386_target_format ()
  83 #else
  84 #ifdef TE_GO32
  85 #define TARGET_FORMAT           "coff-go32"
  86 #endif
  87 #ifdef OBJ_AOUT
  88 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
  89 #endif
  90 #endif
  91
  92 #if (defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF))
  93 #define md_end i386_elf_emit_arch_note
  94 extern void i386_elf_emit_arch_note (void);
  95 #endif
  96
  97 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
  98
  99 /* '$' may be used as immediate prefix.  */
 100 #undef LOCAL_LABELS_DOLLAR
 101 #define LOCAL_LABELS_DOLLAR 0
 102 #undef LOCAL_LABELS_FB
 103 #define LOCAL_LABELS_FB 1
 104
 105 extern const char extra_symbol_chars[];
 106 #define tc_symbol_chars extra_symbol_chars
 107
 108 extern const char *i386_comment_chars;
 109 #define tc_comment_chars i386_comment_chars
 110
 111 /* The name of the global offset table generated by the compiler. Allow
 112    this to be overridden if need be.  */
 113 #ifndef GLOBAL_OFFSET_TABLE_NAME
 114 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 115 #endif
 116
 117 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 118 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 119 extern void x86_cons (expressionS *, int);
 120 #endif
 121
 122 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) x86_cons_fix_new(FRAG, OFF, LEN, EXP)
 123 extern void x86_cons_fix_new
 124   (fragS *, unsigned int, unsigned int, expressionS *);
 125
 126 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 127
 128 #define NO_RELOC BFD_RELOC_NONE
 129
 130 void i386_validate_fix (struct fix *);
 131 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 132
 133 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 134 extern int tc_i386_fix_adjustable (struct fix *);
 135
 136 /* Values passed to md_apply_fix don't include the symbol value.  */
 137 #define MD_APPLY_SYM_VALUE(FIX) 0
 138
 139 /* ELF wants external syms kept, as does PE COFF.  */
 140 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 141 #define EXTERN_FORCE_RELOC                              \
 142   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 143    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 144 #else
 145 #define EXTERN_FORCE_RELOC                              \
 146   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 147 #endif
 148
 149 /* This expression evaluates to true if the relocation is for a local
 150    object for which we still want to do the relocation at runtime.
 151    False if we are willing to perform this relocation while building
 152    the .o file.  GOTOFF and GOT32 do not need to be checked here because
 153    they are not pcrel.  .*/
 154
 155 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 156   (!(FIX)->fx_pcrel                                     \
 157    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32           \
 158    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC           \
 159    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL     \
 160    || TC_FORCE_RELOCATION (FIX))
 161
 162 extern int i386_parse_name (char *, expressionS *, char *);
 163 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 164
 165 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 166 #define md_operator i386_operator
 167
 168 extern int i386_need_index_operator (void);
 169 #define md_need_index_operator i386_need_index_operator
 170
 171 #define md_register_arithmetic 0
 172
 173 extern const struct relax_type md_relax_table[];
 174 #define TC_GENERIC_RELAX_TABLE md_relax_table
 175
 176 extern int optimize_align_code;
 177
 178 #define md_do_align(n, fill, len, max, around)                          \
 179 if ((n)                                                                 \
 180     && !need_pass_2                                                     \
 181     && optimize_align_code                                              \
 182     && (!(fill)                                                         \
 183         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 184     && subseg_text_p (now_seg))                                         \
 185   {                                                                     \
 186     frag_align_code ((n), (max));                                       \
 187     goto around;                                                        \
 188   }
 189
 190 #define MAX_MEM_FOR_RS_ALIGN_CODE  31
 191
 192 extern void i386_align_code (fragS *, int);
 193
 194 #define HANDLE_ALIGN(fragP)                                             \
 195 if (fragP->fr_type == rs_align_code)                                    \
 196   i386_align_code (fragP, (fragP->fr_next->fr_address                   \
 197                            - fragP->fr_address                          \
 198                            - fragP->fr_fix));
 199
 200 void i386_print_statistics (FILE *);
 201 #define tc_print_statistics i386_print_statistics
 202
 203 #define md_number_to_chars number_to_chars_littleendian
 204
 205 enum processor_type
 206 {
 207   PROCESSOR_UNKNOWN,
 208   PROCESSOR_I386,
 209   PROCESSOR_I486,
 210   PROCESSOR_PENTIUM,
 211   PROCESSOR_PENTIUMPRO,
 212   PROCESSOR_PENTIUM4,
 213   PROCESSOR_NOCONA,
 214   PROCESSOR_CORE,
 215   PROCESSOR_CORE2,
 216   PROCESSOR_COREI7,
 217   PROCESSOR_L1OM,
 218   PROCESSOR_K6,
 219   PROCESSOR_ATHLON,
 220   PROCESSOR_K8,
 221   PROCESSOR_GENERIC32,
 222   PROCESSOR_GENERIC64,
 223   PROCESSOR_AMDFAM10,
 224   PROCESSOR_BDVER1
 225 };
 226
 227 extern enum processor_type cpu_arch_tune;
 228 extern enum processor_type cpu_arch_isa;
 229 extern i386_cpu_flags cpu_arch_isa_flags;
 230
 231 struct i386_tc_frag_data
 232 {
 233   enum processor_type isa;
 234   i386_cpu_flags isa_flags;
 235   enum processor_type tune;
 236 };
 237
 238 /* We need to emit the right NOP pattern in .align frags.  This is
 239    done after the text-to-bits assembly pass, so we need to mark it with
 240    the isa/tune settings at the time the .align was assembled.  */
 241 #define TC_FRAG_TYPE struct i386_tc_frag_data
 242
 243 #define TC_FRAG_INIT(FRAGP)                                     \
 244  do                                                             \
 245    {                                                            \
 246      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 247      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 248      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 249    }                                                            \
 250  while (0)
 251
 252 #ifdef SCO_ELF
 253 #define tc_init_after_args() sco_id ()
 254 extern void sco_id (void);
 255 #endif
 256
 257 #define WORKING_DOT_WORD 1
 258
 259 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 260 #define TARGET_USE_CFIPOP 1
 261
 262 extern unsigned int x86_dwarf2_return_column;
 263 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 264
 265 extern int x86_cie_data_alignment;
 266 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 267
 268 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 269 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 270
 271 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 272 extern void tc_x86_frame_initial_instructions (void);
 273
 274 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 275 extern int i386_elf_section_type (const char *, size_t);
 276
 277 #ifdef TE_SOLARIS
 278 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 279 extern void i386_solaris_fix_up_eh_frame (segT);
 280 #endif
 281
 282 /* Support for SHF_X86_64_LARGE */
 283 extern bfd_vma x86_64_section_word (char *, size_t);
 284 extern bfd_vma x86_64_section_letter (int, char **);
 285 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 286 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 287
 288 #ifdef TE_PE
 289
 290 #define O_secrel O_md1
 291
 292 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 293 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 294
 295 #endif /* TE_PE */
 296
 297 /* X_add_symbol:X_op_symbol (Intel mode only) */
 298 #define O_full_ptr O_md2
 299
 300 #endif /* TC_I386 */