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             bfd_arch_i386
  33 #define TARGET_MACH             (i386_mach ())
  34 extern unsigned long i386_mach (void);
  35
  36 #ifdef TE_FreeBSD
  37 #define AOUT_TARGET_FORMAT      "a.out-i386-freebsd"
  38 #endif
  39 #ifdef TE_NetBSD
  40 #define AOUT_TARGET_FORMAT      "a.out-i386-netbsd"
  41 #endif
  42 #ifdef TE_386BSD
  43 #define AOUT_TARGET_FORMAT      "a.out-i386-bsd"
  44 #endif
  45 #ifdef TE_LINUX
  46 #define AOUT_TARGET_FORMAT      "a.out-i386-linux"
  47 #endif
  48 #ifdef TE_Mach
  49 #define AOUT_TARGET_FORMAT      "a.out-mach3"
  50 #endif
  51 #ifdef TE_DYNIX
  52 #define AOUT_TARGET_FORMAT      "a.out-i386-dynix"
  53 #endif
  54 #ifndef AOUT_TARGET_FORMAT
  55 #define AOUT_TARGET_FORMAT      "a.out-i386"
  56 #endif
  57
  58 #ifdef TE_FreeBSD
  59 #define ELF_TARGET_FORMAT       "elf32-i386-freebsd"
  60 #define ELF_TARGET_FORMAT64     "elf64-x86-64-freebsd"
  61 #elif defined (TE_VXWORKS)
  62 #define ELF_TARGET_FORMAT       "elf32-i386-vxworks"
  63 #endif
  64
  65 #ifndef ELF_TARGET_FORMAT
  66 #define ELF_TARGET_FORMAT       "elf32-i386"
  67 #endif
  68
  69 #ifndef ELF_TARGET_FORMAT64
  70 #define ELF_TARGET_FORMAT64     "elf64-x86-64"
  71 #endif
  72
  73 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
  74      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
  75      || defined (TE_PE) || defined (TE_PEP))
  76 extern const char *i386_target_format (void);
  77 #define TARGET_FORMAT i386_target_format ()
  78 #else
  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 /* '$' may be used as immediate prefix.  */
  92 #undef LOCAL_LABELS_DOLLAR
  93 #define LOCAL_LABELS_DOLLAR 0
  94 #undef LOCAL_LABELS_FB
  95 #define LOCAL_LABELS_FB 1
  96
  97 extern const char extra_symbol_chars[];
  98 #define tc_symbol_chars extra_symbol_chars
  99
 100 extern const char *i386_comment_chars;
 101 #define tc_comment_chars i386_comment_chars
 102
 103 /* The name of the global offset table generated by the compiler. Allow
 104    this to be overridden if need be.  */
 105 #ifndef GLOBAL_OFFSET_TABLE_NAME
 106 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 107 #endif
 108
 109 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 110 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 111 extern void x86_cons (expressionS *, int);
 112 #endif
 113
 114 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) x86_cons_fix_new(FRAG, OFF, LEN, EXP)
 115 extern void x86_cons_fix_new
 116   (fragS *, unsigned int, unsigned int, expressionS *);
 117
 118 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 119
 120 #define NO_RELOC BFD_RELOC_NONE
 121
 122 void i386_validate_fix (struct fix *);
 123 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 124
 125 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 126 extern int tc_i386_fix_adjustable (struct fix *);
 127
 128 /* Values passed to md_apply_fix don't include the symbol value.  */
 129 #define MD_APPLY_SYM_VALUE(FIX) 0
 130
 131 /* ELF wants external syms kept, as does PE COFF.  */
 132 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 133 #define EXTERN_FORCE_RELOC                              \
 134   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 135    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 136 #else
 137 #define EXTERN_FORCE_RELOC                              \
 138   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 139 #endif
 140
 141 /* This expression evaluates to true if the relocation is for a local
 142    object for which we still want to do the relocation at runtime.
 143    False if we are willing to perform this relocation while building
 144    the .o file.  GOTOFF does not need to be checked here because it is
 145    not pcrel.  I am not sure if some of the others are ever used with
 146    pcrel, but it is easier to be safe than sorry.  */
 147
 148 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 149   (!(FIX)->fx_pcrel                                     \
 150    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32           \
 151    || (FIX)->fx_r_type == BFD_RELOC_386_GOT32           \
 152    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC           \
 153    || TC_FORCE_RELOCATION (FIX))
 154
 155 extern int i386_parse_name (char *, expressionS *, char *);
 156 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 157
 158 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 159 #define md_operator i386_operator
 160
 161 extern int i386_need_index_operator (void);
 162 #define md_need_index_operator i386_need_index_operator
 163
 164 #define md_register_arithmetic 0
 165
 166 extern const struct relax_type md_relax_table[];
 167 #define TC_GENERIC_RELAX_TABLE md_relax_table
 168
 169 extern int optimize_align_code;
 170
 171 #define md_do_align(n, fill, len, max, around)                          \
 172 if ((n)                                                                 \
 173     && !need_pass_2                                                     \
 174     && optimize_align_code                                              \
 175     && (!(fill)                                                         \
 176         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 177     && subseg_text_p (now_seg))                                         \
 178   {                                                                     \
 179     frag_align_code ((n), (max));                                       \
 180     goto around;                                                        \
 181   }
 182
 183 #define MAX_MEM_FOR_RS_ALIGN_CODE  31
 184
 185 extern void i386_align_code (fragS *, int);
 186
 187 #define HANDLE_ALIGN(fragP)                                             \
 188 if (fragP->fr_type == rs_align_code)                                    \
 189   i386_align_code (fragP, (fragP->fr_next->fr_address                   \
 190                            - fragP->fr_address                          \
 191                            - fragP->fr_fix));
 192
 193 void i386_print_statistics (FILE *);
 194 #define tc_print_statistics i386_print_statistics
 195
 196 #define md_number_to_chars number_to_chars_littleendian
 197
 198 enum processor_type
 199 {
 200   PROCESSOR_UNKNOWN,
 201   PROCESSOR_I386,
 202   PROCESSOR_I486,
 203   PROCESSOR_PENTIUM,
 204   PROCESSOR_PENTIUMPRO,
 205   PROCESSOR_PENTIUM4,
 206   PROCESSOR_NOCONA,
 207   PROCESSOR_CORE,
 208   PROCESSOR_CORE2,
 209   PROCESSOR_COREI7,
 210   PROCESSOR_K6,
 211   PROCESSOR_ATHLON,
 212   PROCESSOR_K8,
 213   PROCESSOR_GENERIC32,
 214   PROCESSOR_GENERIC64,
 215   PROCESSOR_AMDFAM10
 216 };
 217
 218 extern enum processor_type cpu_arch_tune;
 219 extern enum processor_type cpu_arch_isa;
 220 extern i386_cpu_flags cpu_arch_isa_flags;
 221
 222 struct i386_tc_frag_data
 223 {
 224   enum processor_type isa;
 225   i386_cpu_flags isa_flags;
 226   enum processor_type tune;
 227 };
 228
 229 /* We need to emit the right NOP pattern in .align frags.  This is
 230    done after the text-to-bits assembly pass, so we need to mark it with
 231    the isa/tune settings at the time the .align was assembled.  */
 232 #define TC_FRAG_TYPE struct i386_tc_frag_data
 233
 234 #define TC_FRAG_INIT(FRAGP)                                     \
 235  do                                                             \
 236    {                                                            \
 237      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 238      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 239      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 240    }                                                            \
 241  while (0)
 242
 243 #ifdef SCO_ELF
 244 #define tc_init_after_args() sco_id ()
 245 extern void sco_id (void);
 246 #endif
 247
 248 #define WORKING_DOT_WORD 1
 249
 250 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 251 #define TARGET_USE_CFIPOP 1
 252
 253 extern unsigned int x86_dwarf2_return_column;
 254 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 255
 256 extern int x86_cie_data_alignment;
 257 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 258
 259 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 260 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 261
 262 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 263 extern void tc_x86_frame_initial_instructions (void);
 264
 265 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 266 extern int i386_elf_section_type (const char *, size_t);
 267
 268 #ifdef TE_SOLARIS
 269 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 270 extern void i386_solaris_fix_up_eh_frame (segT);
 271 #endif
 272
 273 /* Support for SHF_X86_64_LARGE */
 274 extern bfd_vma x86_64_section_word (char *, size_t);
 275 extern bfd_vma x86_64_section_letter (int, char **);
 276 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 277 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 278
 279 #ifdef TE_PE
 280
 281 #define O_secrel O_md1
 282
 283 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 284 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 285
 286 #endif /* TE_PE */
 287
 288 /* X_add_symbol:X_op_symbol (Intel mode only) */
 289 #define O_full_ptr O_md2
 290
 291 #endif /* TC_I386 */