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, 2010
   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 #ifdef TE_SOLARIS
  67 #define ELF_TARGET_FORMAT       "elf32-i386-sol2"
  68 #define ELF_TARGET_FORMAT64     "elf64-x86-64-sol2"
  69 #endif
  70
  71 #ifndef ELF_TARGET_FORMAT
  72 #define ELF_TARGET_FORMAT       "elf32-i386"
  73 #endif
  74
  75 #ifndef ELF_TARGET_FORMAT64
  76 #define ELF_TARGET_FORMAT64     "elf64-x86-64"
  77 #endif
  78
  79 #ifndef ELF_TARGET_L1OM_FORMAT
  80 #define ELF_TARGET_L1OM_FORMAT  "elf64-l1om"
  81 #endif
  82
  83 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
  84      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
  85      || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
  86 extern const char *i386_target_format (void);
  87 #define TARGET_FORMAT i386_target_format ()
  88 #else
  89 #ifdef TE_GO32
  90 #define TARGET_FORMAT           "coff-go32"
  91 #endif
  92 #ifdef OBJ_AOUT
  93 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
  94 #endif
  95 #endif
  96
  97 #if (defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF))
  98 #define md_end i386_elf_emit_arch_note
  99 extern void i386_elf_emit_arch_note (void);
 100 #endif
 101
 102 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
 103
 104 /* '$' may be used as immediate prefix.  */
 105 #undef LOCAL_LABELS_DOLLAR
 106 #define LOCAL_LABELS_DOLLAR 0
 107 #undef LOCAL_LABELS_FB
 108 #define LOCAL_LABELS_FB 1
 109
 110 extern const char extra_symbol_chars[];
 111 #define tc_symbol_chars extra_symbol_chars
 112
 113 extern const char *i386_comment_chars;
 114 #define tc_comment_chars i386_comment_chars
 115
 116 /* The name of the global offset table generated by the compiler. Allow
 117    this to be overridden if need be.  */
 118 #ifndef GLOBAL_OFFSET_TABLE_NAME
 119 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 120 #endif
 121
 122 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 123 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 124 extern void x86_cons (expressionS *, int);
 125 #endif
 126
 127 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) x86_cons_fix_new(FRAG, OFF, LEN, EXP)
 128 extern void x86_cons_fix_new
 129   (fragS *, unsigned int, unsigned int, expressionS *);
 130
 131 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 132
 133 #define NO_RELOC BFD_RELOC_NONE
 134
 135 void i386_validate_fix (struct fix *);
 136 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 137
 138 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 139 extern int tc_i386_fix_adjustable (struct fix *);
 140
 141 /* Values passed to md_apply_fix don't include the symbol value.  */
 142 #define MD_APPLY_SYM_VALUE(FIX) 0
 143
 144 /* ELF wants external syms kept, as does PE COFF.  */
 145 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 146 #define EXTERN_FORCE_RELOC                              \
 147   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 148    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 149 #else
 150 #define EXTERN_FORCE_RELOC                              \
 151   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 152 #endif
 153
 154 /* This expression evaluates to true if the relocation is for a local
 155    object for which we still want to do the relocation at runtime.
 156    False if we are willing to perform this relocation while building
 157    the .o file.  GOTOFF and GOT32 do not need to be checked here because
 158    they are not pcrel.  .*/
 159
 160 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 161   (!(FIX)->fx_pcrel                                     \
 162    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32           \
 163    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC           \
 164    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL     \
 165    || TC_FORCE_RELOCATION (FIX))
 166
 167 extern int i386_parse_name (char *, expressionS *, char *);
 168 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 169
 170 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 171 #define md_operator i386_operator
 172
 173 extern int i386_need_index_operator (void);
 174 #define md_need_index_operator i386_need_index_operator
 175
 176 #define md_register_arithmetic 0
 177
 178 extern const struct relax_type md_relax_table[];
 179 #define TC_GENERIC_RELAX_TABLE md_relax_table
 180
 181 extern int optimize_align_code;
 182
 183 #define md_do_align(n, fill, len, max, around)                          \
 184 if ((n)                                                                 \
 185     && !need_pass_2                                                     \
 186     && optimize_align_code                                              \
 187     && (!(fill)                                                         \
 188         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 189     && subseg_text_p (now_seg))                                         \
 190   {                                                                     \
 191     frag_align_code ((n), (max));                                       \
 192     goto around;                                                        \
 193   }
 194
 195 #define MAX_MEM_FOR_RS_ALIGN_CODE  31
 196
 197 extern void i386_align_code (fragS *, int);
 198
 199 #define HANDLE_ALIGN(fragP)                                             \
 200 if (fragP->fr_type == rs_align_code)                                    \
 201   i386_align_code (fragP, (fragP->fr_next->fr_address                   \
 202                            - fragP->fr_address                          \
 203                            - fragP->fr_fix));
 204
 205 void i386_print_statistics (FILE *);
 206 #define tc_print_statistics i386_print_statistics
 207
 208 #define md_number_to_chars number_to_chars_littleendian
 209
 210 enum processor_type
 211 {
 212   PROCESSOR_UNKNOWN,
 213   PROCESSOR_I386,
 214   PROCESSOR_I486,
 215   PROCESSOR_PENTIUM,
 216   PROCESSOR_PENTIUMPRO,
 217   PROCESSOR_PENTIUM4,
 218   PROCESSOR_NOCONA,
 219   PROCESSOR_CORE,
 220   PROCESSOR_CORE2,
 221   PROCESSOR_COREI7,
 222   PROCESSOR_L1OM,
 223   PROCESSOR_K6,
 224   PROCESSOR_ATHLON,
 225   PROCESSOR_K8,
 226   PROCESSOR_GENERIC32,
 227   PROCESSOR_GENERIC64,
 228   PROCESSOR_AMDFAM10,
 229   PROCESSOR_BDVER1
 230 };
 231
 232 extern enum processor_type cpu_arch_tune;
 233 extern enum processor_type cpu_arch_isa;
 234 extern i386_cpu_flags cpu_arch_isa_flags;
 235
 236 struct i386_tc_frag_data
 237 {
 238   enum processor_type isa;
 239   i386_cpu_flags isa_flags;
 240   enum processor_type tune;
 241 };
 242
 243 /* We need to emit the right NOP pattern in .align frags.  This is
 244    done after the text-to-bits assembly pass, so we need to mark it with
 245    the isa/tune settings at the time the .align was assembled.  */
 246 #define TC_FRAG_TYPE struct i386_tc_frag_data
 247
 248 #define TC_FRAG_INIT(FRAGP)                                     \
 249  do                                                             \
 250    {                                                            \
 251      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 252      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 253      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 254    }                                                            \
 255  while (0)
 256
 257 #ifdef SCO_ELF
 258 #define tc_init_after_args() sco_id ()
 259 extern void sco_id (void);
 260 #endif
 261
 262 #define WORKING_DOT_WORD 1
 263
 264 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 265 #define TARGET_USE_CFIPOP 1
 266
 267 extern unsigned int x86_dwarf2_return_column;
 268 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 269
 270 extern int x86_cie_data_alignment;
 271 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 272
 273 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 274 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 275
 276 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 277 extern void tc_x86_frame_initial_instructions (void);
 278
 279 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 280 extern int i386_elf_section_type (const char *, size_t);
 281
 282 #ifdef TE_SOLARIS
 283 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 284 extern void i386_solaris_fix_up_eh_frame (segT);
 285 #endif
 286
 287 /* Support for SHF_X86_64_LARGE */
 288 extern bfd_vma x86_64_section_word (char *, size_t);
 289 extern bfd_vma x86_64_section_letter (int, char **);
 290 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 291 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 292
 293 #ifdef TE_PE
 294
 295 #define O_secrel O_md1
 296
 297 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 298 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 299
 300 #endif /* TE_PE */
 301
 302 /* X_add_symbol:X_op_symbol (Intel mode only) */
 303 #define O_full_ptr O_md2
 304
 305 #endif /* TC_I386 */