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 /* BSF_GNU_INDIRECT_FUNCTION symbols always need relocatoon.  */
 147 #define TC_FORCE_RELOCATION(FIX)                        \
 148   ((symbol_get_bfdsym ((FIX)->fx_addsy)->flags          \
 149     & BSF_GNU_INDIRECT_FUNCTION)                        \
 150    || generic_force_reloc (FIX))
 151
 152 /* This expression evaluates to true if the relocation is for a local
 153    object for which we still want to do the relocation at runtime.
 154    False if we are willing to perform this relocation while building
 155    the .o file.  GOTOFF does not need to be checked here because it is
 156    not pcrel.  I am not sure if some of the others are ever used with
 157    pcrel, but it is easier to be safe than sorry.  */
 158
 159 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 160   (!(FIX)->fx_pcrel                                     \
 161    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32           \
 162    || (FIX)->fx_r_type == BFD_RELOC_386_GOT32           \
 163    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC           \
 164    || TC_FORCE_RELOCATION (FIX))
 165
 166 extern int i386_parse_name (char *, expressionS *, char *);
 167 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 168
 169 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 170 #define md_operator i386_operator
 171
 172 extern int i386_need_index_operator (void);
 173 #define md_need_index_operator i386_need_index_operator
 174
 175 #define md_register_arithmetic 0
 176
 177 extern const struct relax_type md_relax_table[];
 178 #define TC_GENERIC_RELAX_TABLE md_relax_table
 179
 180 extern int optimize_align_code;
 181
 182 #define md_do_align(n, fill, len, max, around)                          \
 183 if ((n)                                                                 \
 184     && !need_pass_2                                                     \
 185     && optimize_align_code                                              \
 186     && (!(fill)                                                         \
 187         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 188     && subseg_text_p (now_seg))                                         \
 189   {                                                                     \
 190     frag_align_code ((n), (max));                                       \
 191     goto around;                                                        \
 192   }
 193
 194 #define MAX_MEM_FOR_RS_ALIGN_CODE  31
 195
 196 extern void i386_align_code (fragS *, int);
 197
 198 #define HANDLE_ALIGN(fragP)                                             \
 199 if (fragP->fr_type == rs_align_code)                                    \
 200   i386_align_code (fragP, (fragP->fr_next->fr_address                   \
 201                            - fragP->fr_address                          \
 202                            - fragP->fr_fix));
 203
 204 void i386_print_statistics (FILE *);
 205 #define tc_print_statistics i386_print_statistics
 206
 207 #define md_number_to_chars number_to_chars_littleendian
 208
 209 enum processor_type
 210 {
 211   PROCESSOR_UNKNOWN,
 212   PROCESSOR_I386,
 213   PROCESSOR_I486,
 214   PROCESSOR_PENTIUM,
 215   PROCESSOR_PENTIUMPRO,
 216   PROCESSOR_PENTIUM4,
 217   PROCESSOR_NOCONA,
 218   PROCESSOR_CORE,
 219   PROCESSOR_CORE2,
 220   PROCESSOR_COREI7,
 221   PROCESSOR_K6,
 222   PROCESSOR_ATHLON,
 223   PROCESSOR_K8,
 224   PROCESSOR_GENERIC32,
 225   PROCESSOR_GENERIC64,
 226   PROCESSOR_AMDFAM10
 227 };
 228
 229 extern enum processor_type cpu_arch_tune;
 230 extern enum processor_type cpu_arch_isa;
 231 extern i386_cpu_flags cpu_arch_isa_flags;
 232
 233 struct i386_tc_frag_data
 234 {
 235   enum processor_type isa;
 236   i386_cpu_flags isa_flags;
 237   enum processor_type tune;
 238 };
 239
 240 /* We need to emit the right NOP pattern in .align frags.  This is
 241    done after the text-to-bits assembly pass, so we need to mark it with
 242    the isa/tune settings at the time the .align was assembled.  */
 243 #define TC_FRAG_TYPE struct i386_tc_frag_data
 244
 245 #define TC_FRAG_INIT(FRAGP)                                     \
 246  do                                                             \
 247    {                                                            \
 248      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 249      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 250      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 251    }                                                            \
 252  while (0)
 253
 254 #ifdef SCO_ELF
 255 #define tc_init_after_args() sco_id ()
 256 extern void sco_id (void);
 257 #endif
 258
 259 #define WORKING_DOT_WORD 1
 260
 261 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 262 #define TARGET_USE_CFIPOP 1
 263
 264 extern unsigned int x86_dwarf2_return_column;
 265 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 266
 267 extern int x86_cie_data_alignment;
 268 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 269
 270 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 271 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 272
 273 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 274 extern void tc_x86_frame_initial_instructions (void);
 275
 276 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 277 extern int i386_elf_section_type (const char *, size_t);
 278
 279 #ifdef TE_SOLARIS
 280 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 281 extern void i386_solaris_fix_up_eh_frame (segT);
 282 #endif
 283
 284 /* Support for SHF_X86_64_LARGE */
 285 extern bfd_vma x86_64_section_word (char *, size_t);
 286 extern bfd_vma x86_64_section_letter (int, char **);
 287 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 288 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 289
 290 #ifdef TE_PE
 291
 292 #define O_secrel O_md1
 293
 294 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 295 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 296
 297 #endif /* TE_PE */
 298
 299 /* X_add_symbol:X_op_symbol (Intel mode only) */
 300 #define O_full_ptr O_md2
 301
 302 #endif /* TC_I386 */