gas/config/tc-i386.h

   1 /* tc-i386.h -- Header file for tc-i386.c
   2    Copyright (C) 1989-2015 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    GAS is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  19    02110-1301, USA.  */
  20
  21 #ifndef TC_I386
  22 #define TC_I386 1
  23
  24 #include "opcodes/i386-opc.h"
  25
  26 struct fix;
  27
  28 #define TARGET_BYTES_BIG_ENDIAN 0
  29
  30 #define TARGET_ARCH             (i386_arch ())
  31 #define TARGET_MACH             (i386_mach ())
  32 extern enum bfd_architecture i386_arch (void);
  33 extern unsigned long i386_mach (void);
  34
  35 #ifdef TE_FreeBSD
  36 #define AOUT_TARGET_FORMAT      "a.out-i386-freebsd"
  37 #endif
  38 #ifdef TE_NetBSD
  39 #define AOUT_TARGET_FORMAT      "a.out-i386-netbsd"
  40 #endif
  41 #ifdef TE_386BSD
  42 #define AOUT_TARGET_FORMAT      "a.out-i386-bsd"
  43 #endif
  44 #ifdef TE_LINUX
  45 #define AOUT_TARGET_FORMAT      "a.out-i386-linux"
  46 #endif
  47 #ifdef TE_Mach
  48 #define AOUT_TARGET_FORMAT      "a.out-mach3"
  49 #endif
  50 #ifdef TE_DYNIX
  51 #define AOUT_TARGET_FORMAT      "a.out-i386-dynix"
  52 #endif
  53 #ifndef AOUT_TARGET_FORMAT
  54 #define AOUT_TARGET_FORMAT      "a.out-i386"
  55 #endif
  56
  57 #ifdef TE_FreeBSD
  58 #define ELF_TARGET_FORMAT       "elf32-i386-freebsd"
  59 #define ELF_TARGET_FORMAT64     "elf64-x86-64-freebsd"
  60 #elif defined (TE_VXWORKS)
  61 #define ELF_TARGET_FORMAT       "elf32-i386-vxworks"
  62 #elif defined (TE_NACL)
  63 #define ELF_TARGET_FORMAT       "elf32-i386-nacl"
  64 #define ELF_TARGET_FORMAT32     "elf32-x86-64-nacl"
  65 #define ELF_TARGET_FORMAT64     "elf64-x86-64-nacl"
  66 #endif
  67
  68 #ifdef TE_SOLARIS
  69 #define ELF_TARGET_FORMAT       "elf32-i386-sol2"
  70 #define ELF_TARGET_FORMAT64     "elf64-x86-64-sol2"
  71 #endif
  72
  73 #ifndef ELF_TARGET_FORMAT
  74 #define ELF_TARGET_FORMAT       "elf32-i386"
  75 #endif
  76
  77 #ifndef ELF_TARGET_FORMAT64
  78 #define ELF_TARGET_FORMAT64     "elf64-x86-64"
  79 #endif
  80
  81 #ifndef ELF_TARGET_FORMAT32
  82 #define ELF_TARGET_FORMAT32     "elf32-x86-64"
  83 #endif
  84
  85 #ifndef ELF_TARGET_L1OM_FORMAT
  86 #define ELF_TARGET_L1OM_FORMAT  "elf64-l1om"
  87 #endif
  88
  89 #ifndef ELF_TARGET_K1OM_FORMAT
  90 #define ELF_TARGET_K1OM_FORMAT  "elf64-k1om"
  91 #endif
  92
  93 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
  94      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
  95      || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
  96 extern const char *i386_target_format (void);
  97 #define TARGET_FORMAT i386_target_format ()
  98 #else
  99 #ifdef TE_GO32
 100 #define TARGET_FORMAT           "coff-go32"
 101 #endif
 102 #ifdef OBJ_AOUT
 103 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
 104 #endif
 105 #endif
 106
 107 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
 108
 109 /* '$' may be used as immediate prefix.  */
 110 #undef LOCAL_LABELS_DOLLAR
 111 #define LOCAL_LABELS_DOLLAR 0
 112 #undef LOCAL_LABELS_FB
 113 #define LOCAL_LABELS_FB 1
 114
 115 extern const char extra_symbol_chars[];
 116 #define tc_symbol_chars extra_symbol_chars
 117
 118 extern const char *i386_comment_chars;
 119 #define tc_comment_chars i386_comment_chars
 120
 121 /* The name of the global offset table generated by the compiler. Allow
 122    this to be overridden if need be.  */
 123 #ifndef GLOBAL_OFFSET_TABLE_NAME
 124 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 125 #endif
 126
 127 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 128 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 129 #endif
 130 extern bfd_reloc_code_real_type x86_cons (expressionS *, int);
 131
 132 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC)     \
 133   x86_cons_fix_new(FRAG, OFF, LEN, EXP, RELOC)
 134 extern void x86_cons_fix_new
 135 (fragS *, unsigned int, unsigned int, expressionS *, bfd_reloc_code_real_type);
 136
 137 #define TC_ADDRESS_BYTES x86_address_bytes
 138 extern int x86_address_bytes (void);
 139
 140 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 141
 142 #define NO_RELOC BFD_RELOC_NONE
 143
 144 void i386_validate_fix (struct fix *);
 145 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 146
 147 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 148 extern int tc_i386_fix_adjustable (struct fix *);
 149
 150 /* Values passed to md_apply_fix don't include the symbol value.  */
 151 #define MD_APPLY_SYM_VALUE(FIX) 0
 152
 153 /* ELF wants external syms kept, as does PE COFF.  */
 154 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 155 #define EXTERN_FORCE_RELOC                              \
 156   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 157    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 158 #else
 159 #define EXTERN_FORCE_RELOC                              \
 160   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 161 #endif
 162
 163 /* This expression evaluates to true if the relocation is for a local
 164    object for which we still want to do the relocation at runtime.
 165    False if we are willing to perform this relocation while building
 166    the .o file.  GOTOFF and GOT32 do not need to be checked here because
 167    they are not pcrel.  .*/
 168
 169 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 170   (!(FIX)->fx_pcrel                                     \
 171    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32           \
 172    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC           \
 173    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL     \
 174    || TC_FORCE_RELOCATION (FIX))
 175
 176 extern int i386_parse_name (char *, expressionS *, char *);
 177 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 178
 179 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 180 #define md_operator i386_operator
 181
 182 extern int i386_need_index_operator (void);
 183 #define md_need_index_operator i386_need_index_operator
 184
 185 #define md_register_arithmetic 0
 186
 187 extern const struct relax_type md_relax_table[];
 188 #define TC_GENERIC_RELAX_TABLE md_relax_table
 189
 190 extern int optimize_align_code;
 191
 192 #define md_do_align(n, fill, len, max, around)                          \
 193 if ((n)                                                                 \
 194     && !need_pass_2                                                     \
 195     && optimize_align_code                                              \
 196     && (!(fill)                                                         \
 197         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 198     && subseg_text_p (now_seg))                                         \
 199   {                                                                     \
 200     frag_align_code ((n), (max));                                       \
 201     goto around;                                                        \
 202   }
 203
 204 #define MAX_MEM_FOR_RS_ALIGN_CODE  31
 205
 206 extern void i386_align_code (fragS *, int);
 207
 208 #define HANDLE_ALIGN(fragP)                                             \
 209 if (fragP->fr_type == rs_align_code)                                    \
 210   i386_align_code (fragP, (fragP->fr_next->fr_address                   \
 211                            - fragP->fr_address                          \
 212                            - fragP->fr_fix));
 213
 214 void i386_print_statistics (FILE *);
 215 #define tc_print_statistics i386_print_statistics
 216
 217 extern unsigned int i386_frag_max_var (fragS *);
 218 #define md_frag_max_var i386_frag_max_var
 219
 220 #define md_number_to_chars number_to_chars_littleendian
 221
 222 enum processor_type
 223 {
 224   PROCESSOR_UNKNOWN,
 225   PROCESSOR_I386,
 226   PROCESSOR_I486,
 227   PROCESSOR_PENTIUM,
 228   PROCESSOR_PENTIUMPRO,
 229   PROCESSOR_PENTIUM4,
 230   PROCESSOR_NOCONA,
 231   PROCESSOR_CORE,
 232   PROCESSOR_CORE2,
 233   PROCESSOR_COREI7,
 234   PROCESSOR_L1OM,
 235   PROCESSOR_K1OM,
 236   PROCESSOR_K6,
 237   PROCESSOR_ATHLON,
 238   PROCESSOR_K8,
 239   PROCESSOR_GENERIC32,
 240   PROCESSOR_GENERIC64,
 241   PROCESSOR_AMDFAM10,
 242   PROCESSOR_BD,
 243   PROCESSOR_ZNVER,
 244   PROCESSOR_BT
 245 };
 246
 247 extern enum processor_type cpu_arch_tune;
 248 extern enum processor_type cpu_arch_isa;
 249 extern i386_cpu_flags cpu_arch_isa_flags;
 250
 251 struct i386_tc_frag_data
 252 {
 253   enum processor_type isa;
 254   i386_cpu_flags isa_flags;
 255   enum processor_type tune;
 256 };
 257
 258 /* We need to emit the right NOP pattern in .align frags.  This is
 259    done after the text-to-bits assembly pass, so we need to mark it with
 260    the isa/tune settings at the time the .align was assembled.  */
 261 #define TC_FRAG_TYPE struct i386_tc_frag_data
 262
 263 #define TC_FRAG_INIT(FRAGP)                                     \
 264  do                                                             \
 265    {                                                            \
 266      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 267      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 268      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 269    }                                                            \
 270  while (0)
 271
 272 #ifdef SCO_ELF
 273 #define tc_init_after_args() sco_id ()
 274 extern void sco_id (void);
 275 #endif
 276
 277 #define WORKING_DOT_WORD 1
 278
 279 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 280 #define TARGET_USE_CFIPOP 1
 281
 282 extern unsigned int x86_dwarf2_return_column;
 283 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 284
 285 extern int x86_cie_data_alignment;
 286 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 287
 288 extern int x86_dwarf2_addr_size (void);
 289 #define DWARF2_ADDR_SIZE(bfd) x86_dwarf2_addr_size ()
 290
 291 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 292 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 293
 294 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 295 extern void tc_x86_frame_initial_instructions (void);
 296
 297 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 298 extern int i386_elf_section_type (const char *, size_t);
 299
 300 #ifdef TE_SOLARIS
 301 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 302 extern void i386_solaris_fix_up_eh_frame (segT);
 303 #endif
 304
 305 /* Support for SHF_X86_64_LARGE */
 306 extern bfd_vma x86_64_section_word (char *, size_t);
 307 extern bfd_vma x86_64_section_letter (int, char **);
 308 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 309 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 310
 311 #ifdef TE_PE
 312
 313 #define O_secrel O_md1
 314
 315 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 316 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 317
 318 #endif /* TE_PE */
 319
 320 /* X_add_symbol:X_op_symbol (Intel mode only) */
 321 #define O_full_ptr O_md2
 322
 323 #ifdef OBJ_MACH_O
 324
 325 #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX))
 326
 327 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \
 328           (obj_mach_o_force_reloc_sub_same (FIX, SEG))
 329
 330 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \
 331         (obj_mach_o_force_reloc_sub_local (FIX, SEG))
 332
 333 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
 334
 335 #endif /* OBJ_MACH_O */
 336
 337 #endif /* TC_I386 */