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
   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 OBJ_AOUT
  85 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
  86 #endif
  87 #endif
  88
  89 #if (defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF))
  90 #define md_end i386_elf_emit_arch_note
  91 extern void i386_elf_emit_arch_note (void);
  92 #endif
  93
  94 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
  95
  96 /* '$' may be used as immediate prefix.  */
  97 #undef LOCAL_LABELS_DOLLAR
  98 #define LOCAL_LABELS_DOLLAR 0
  99 #undef LOCAL_LABELS_FB
 100 #define LOCAL_LABELS_FB 1
 101
 102 extern const char extra_symbol_chars[];
 103 #define tc_symbol_chars extra_symbol_chars
 104
 105 extern const char *i386_comment_chars;
 106 #define tc_comment_chars i386_comment_chars
 107
 108 /* The name of the global offset table generated by the compiler. Allow
 109    this to be overridden if need be.  */
 110 #ifndef GLOBAL_OFFSET_TABLE_NAME
 111 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 112 #endif
 113
 114 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 115 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 116 extern void x86_cons (expressionS *, int);
 117 #endif
 118
 119 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) x86_cons_fix_new(FRAG, OFF, LEN, EXP)
 120 extern void x86_cons_fix_new
 121   (fragS *, unsigned int, unsigned int, expressionS *);
 122
 123 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 124
 125 #define NO_RELOC BFD_RELOC_NONE
 126
 127 void i386_validate_fix (struct fix *);
 128 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 129
 130 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 131 extern int tc_i386_fix_adjustable (struct fix *);
 132
 133 /* Values passed to md_apply_fix don't include the symbol value.  */
 134 #define MD_APPLY_SYM_VALUE(FIX) 0
 135
 136 /* ELF wants external syms kept, as does PE COFF.  */
 137 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 138 #define EXTERN_FORCE_RELOC                              \
 139   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 140    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 141 #else
 142 #define EXTERN_FORCE_RELOC                              \
 143   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 144 #endif
 145
 146 /* This expression evaluates to true if the relocation is for a local
 147    object for which we still want to do the relocation at runtime.
 148    False if we are willing to perform this relocation while building
 149    the .o file.  GOTOFF does not need to be checked here because it is
 150    not pcrel.  I am not sure if some of the others are ever used with
 151    pcrel, but it is easier to be safe than sorry.  */
 152
 153 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 154   (!(FIX)->fx_pcrel                                     \
 155    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32           \
 156    || (FIX)->fx_r_type == BFD_RELOC_386_GOT32           \
 157    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC           \
 158    || TC_FORCE_RELOCATION (FIX))
 159
 160 extern int i386_parse_name (char *, expressionS *, char *);
 161 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 162
 163 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 164 #define md_operator i386_operator
 165
 166 extern int i386_need_index_operator (void);
 167 #define md_need_index_operator i386_need_index_operator
 168
 169 #define md_register_arithmetic 0
 170
 171 extern const struct relax_type md_relax_table[];
 172 #define TC_GENERIC_RELAX_TABLE md_relax_table
 173
 174 extern int optimize_align_code;
 175
 176 #define md_do_align(n, fill, len, max, around)                          \
 177 if ((n)                                                                 \
 178     && !need_pass_2                                                     \
 179     && optimize_align_code                                              \
 180     && (!(fill)                                                         \
 181         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 182     && subseg_text_p (now_seg))                                         \
 183   {                                                                     \
 184     frag_align_code ((n), (max));                                       \
 185     goto around;                                                        \
 186   }
 187
 188 #define MAX_MEM_FOR_RS_ALIGN_CODE  31
 189
 190 extern void i386_align_code (fragS *, int);
 191
 192 #define HANDLE_ALIGN(fragP)                                             \
 193 if (fragP->fr_type == rs_align_code)                                    \
 194   i386_align_code (fragP, (fragP->fr_next->fr_address                   \
 195                            - fragP->fr_address                          \
 196                            - fragP->fr_fix));
 197
 198 void i386_print_statistics (FILE *);
 199 #define tc_print_statistics i386_print_statistics
 200
 201 #define md_number_to_chars number_to_chars_littleendian
 202
 203 enum processor_type
 204 {
 205   PROCESSOR_UNKNOWN,
 206   PROCESSOR_I386,
 207   PROCESSOR_I486,
 208   PROCESSOR_PENTIUM,
 209   PROCESSOR_PENTIUMPRO,
 210   PROCESSOR_PENTIUM4,
 211   PROCESSOR_NOCONA,
 212   PROCESSOR_CORE,
 213   PROCESSOR_CORE2,
 214   PROCESSOR_COREI7,
 215   PROCESSOR_K6,
 216   PROCESSOR_ATHLON,
 217   PROCESSOR_K8,
 218   PROCESSOR_GENERIC32,
 219   PROCESSOR_GENERIC64,
 220   PROCESSOR_AMDFAM10
 221 };
 222
 223 extern enum processor_type cpu_arch_tune;
 224 extern enum processor_type cpu_arch_isa;
 225 extern i386_cpu_flags cpu_arch_isa_flags;
 226
 227 struct i386_tc_frag_data
 228 {
 229   enum processor_type isa;
 230   i386_cpu_flags isa_flags;
 231   enum processor_type tune;
 232 };
 233
 234 /* We need to emit the right NOP pattern in .align frags.  This is
 235    done after the text-to-bits assembly pass, so we need to mark it with
 236    the isa/tune settings at the time the .align was assembled.  */
 237 #define TC_FRAG_TYPE struct i386_tc_frag_data
 238
 239 #define TC_FRAG_INIT(FRAGP)                                     \
 240  do                                                             \
 241    {                                                            \
 242      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 243      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 244      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 245    }                                                            \
 246  while (0)
 247
 248 #ifdef SCO_ELF
 249 #define tc_init_after_args() sco_id ()
 250 extern void sco_id (void);
 251 #endif
 252
 253 #define WORKING_DOT_WORD 1
 254
 255 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 256 #define TARGET_USE_CFIPOP 1
 257
 258 extern unsigned int x86_dwarf2_return_column;
 259 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 260
 261 extern int x86_cie_data_alignment;
 262 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 263
 264 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 265 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 266
 267 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 268 extern void tc_x86_frame_initial_instructions (void);
 269
 270 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 271 extern int i386_elf_section_type (const char *, size_t);
 272
 273 #ifdef TE_SOLARIS
 274 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 275 extern void i386_solaris_fix_up_eh_frame (segT);
 276 #endif
 277
 278 /* Support for SHF_X86_64_LARGE */
 279 extern bfd_vma x86_64_section_word (char *, size_t);
 280 extern bfd_vma x86_64_section_letter (int, char **);
 281 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 282 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 283
 284 #ifdef TE_PE
 285
 286 #define O_secrel O_md1
 287
 288 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 289 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 290
 291 #endif /* TE_PE */
 292
 293 /* X_add_symbol:X_op_symbol (Intel mode only) */
 294 #define O_full_ptr O_md2
 295
 296 #endif /* TC_I386 */