gas/config/tc-i386.h

   1 /* tc-i386.h -- Header file for tc-i386.c
   2    Copyright (C) 1989-2018 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 #ifndef ELF_TARGET_IAMCU_FORMAT
  94 #define ELF_TARGET_IAMCU_FORMAT "elf32-iamcu"
  95 #endif
  96
  97 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
  98      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
  99      || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
 100 extern const char *i386_target_format (void);
 101 #define TARGET_FORMAT i386_target_format ()
 102 #else
 103 #ifdef TE_GO32
 104 #define TARGET_FORMAT           "coff-go32"
 105 #endif
 106 #ifdef OBJ_AOUT
 107 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
 108 #endif
 109 #endif
 110
 111 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
 112
 113 /* '$' may be used as immediate prefix.  */
 114 #undef LOCAL_LABELS_DOLLAR
 115 #define LOCAL_LABELS_DOLLAR 0
 116 #undef LOCAL_LABELS_FB
 117 #define LOCAL_LABELS_FB 1
 118
 119 extern const char extra_symbol_chars[];
 120 #define tc_symbol_chars extra_symbol_chars
 121
 122 extern const char *i386_comment_chars;
 123 #define tc_comment_chars i386_comment_chars
 124
 125 /* The name of the global offset table generated by the compiler. Allow
 126    this to be overridden if need be.  */
 127 #ifndef GLOBAL_OFFSET_TABLE_NAME
 128 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 129 #endif
 130
 131 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 132 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 133 #endif
 134 extern bfd_reloc_code_real_type x86_cons (expressionS *, int);
 135
 136 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC)     \
 137   x86_cons_fix_new(FRAG, OFF, LEN, EXP, RELOC)
 138 extern void x86_cons_fix_new
 139 (fragS *, unsigned int, unsigned int, expressionS *, bfd_reloc_code_real_type);
 140
 141 #define TC_ADDRESS_BYTES x86_address_bytes
 142 extern int x86_address_bytes (void);
 143
 144 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 145
 146 #define NO_RELOC BFD_RELOC_NONE
 147
 148 void i386_validate_fix (struct fix *);
 149 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 150
 151 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 152 extern int tc_i386_fix_adjustable (struct fix *);
 153
 154 /* Values passed to md_apply_fix don't include the symbol value.  */
 155 #define MD_APPLY_SYM_VALUE(FIX) 0
 156
 157 /* ELF wants external syms kept, as does PE COFF.  */
 158 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 159 #define EXTERN_FORCE_RELOC                              \
 160   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 161    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 162 #else
 163 #define EXTERN_FORCE_RELOC                              \
 164   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 165 #endif
 166
 167 /* This expression evaluates to true if the relocation is for a local
 168    object for which we still want to do the relocation at runtime.
 169    False if we are willing to perform this relocation while building
 170    the .o file.  GOTOFF and GOT32 do not need to be checked here because
 171    they are not pcrel.  .*/
 172
 173 #define TC_FORCE_RELOCATION_LOCAL(FIX)                          \
 174   (GENERIC_FORCE_RELOCATION_LOCAL (FIX)                         \
 175    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32                   \
 176    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC                   \
 177    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX            \
 178    || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX)
 179
 180 extern int i386_parse_name (char *, expressionS *, char *);
 181 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 182
 183 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 184 #define md_operator i386_operator
 185
 186 extern int i386_need_index_operator (void);
 187 #define md_need_index_operator i386_need_index_operator
 188
 189 #define md_register_arithmetic 0
 190
 191 extern const struct relax_type md_relax_table[];
 192 #define TC_GENERIC_RELAX_TABLE md_relax_table
 193
 194 extern int optimize_align_code;
 195
 196 #define md_do_align(n, fill, len, max, around)                          \
 197 if ((n)                                                                 \
 198     && !need_pass_2                                                     \
 199     && optimize_align_code                                              \
 200     && (!(fill)                                                         \
 201         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 202     && subseg_text_p (now_seg))                                         \
 203   {                                                                     \
 204     frag_align_code ((n), (max));                                       \
 205     goto around;                                                        \
 206   }
 207
 208 #define MAX_MEM_FOR_RS_ALIGN_CODE 4095
 209
 210 void i386_print_statistics (FILE *);
 211 #define tc_print_statistics i386_print_statistics
 212
 213 extern unsigned int i386_frag_max_var (fragS *);
 214 #define md_frag_max_var i386_frag_max_var
 215
 216 #define md_number_to_chars number_to_chars_littleendian
 217
 218 enum processor_type
 219 {
 220   PROCESSOR_UNKNOWN,
 221   PROCESSOR_I386,
 222   PROCESSOR_I486,
 223   PROCESSOR_PENTIUM,
 224   PROCESSOR_PENTIUMPRO,
 225   PROCESSOR_PENTIUM4,
 226   PROCESSOR_NOCONA,
 227   PROCESSOR_CORE,
 228   PROCESSOR_CORE2,
 229   PROCESSOR_COREI7,
 230   PROCESSOR_L1OM,
 231   PROCESSOR_K1OM,
 232   PROCESSOR_IAMCU,
 233   PROCESSOR_K6,
 234   PROCESSOR_ATHLON,
 235   PROCESSOR_K8,
 236   PROCESSOR_GENERIC32,
 237   PROCESSOR_GENERIC64,
 238   PROCESSOR_AMDFAM10,
 239   PROCESSOR_BD,
 240   PROCESSOR_ZNVER,
 241   PROCESSOR_BT
 242 };
 243
 244 extern enum processor_type cpu_arch_tune;
 245 extern enum processor_type cpu_arch_isa;
 246 extern i386_cpu_flags cpu_arch_isa_flags;
 247
 248 struct i386_tc_frag_data
 249 {
 250   enum processor_type isa;
 251   i386_cpu_flags isa_flags;
 252   enum processor_type tune;
 253 };
 254
 255 /* We need to emit the right NOP pattern in .align frags.  This is
 256    done after the text-to-bits assembly pass, so we need to mark it with
 257    the isa/tune settings at the time the .align was assembled.  */
 258 #define TC_FRAG_TYPE struct i386_tc_frag_data
 259
 260 #define TC_FRAG_INIT(FRAGP)                                     \
 261  do                                                             \
 262    {                                                            \
 263      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 264      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 265      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 266    }                                                            \
 267  while (0)
 268
 269 #define WORKING_DOT_WORD 1
 270
 271 /* How to generate NOPs for .nop direct directive.  */
 272 extern void i386_generate_nops (fragS *, char *, offsetT, int);
 273 #define md_generate_nops(frag, where, amount, control) \
 274   i386_generate_nops ((frag), (where), (amount), (control))
 275
 276 #define HANDLE_ALIGN(fragP)                                             \
 277 if (fragP->fr_type == rs_align_code)                                    \
 278   {                                                                     \
 279     offsetT __count = (fragP->fr_next->fr_address                       \
 280                        - fragP->fr_address                              \
 281                        - fragP->fr_fix);                                \
 282     if (__count > 0 && __count <= MAX_MEM_FOR_RS_ALIGN_CODE)            \
 283       md_generate_nops (fragP, fragP->fr_literal + fragP->fr_fix,       \
 284                         __count, 0);                                    \
 285   }
 286
 287 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 288 #define TARGET_USE_CFIPOP 1
 289
 290 extern unsigned int x86_dwarf2_return_column;
 291 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 292
 293 extern int x86_cie_data_alignment;
 294 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 295
 296 extern int x86_dwarf2_addr_size (void);
 297 #define DWARF2_ADDR_SIZE(bfd) x86_dwarf2_addr_size ()
 298
 299 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 300 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 301
 302 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 303 extern void tc_x86_frame_initial_instructions (void);
 304
 305 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 306 extern int i386_elf_section_type (const char *, size_t);
 307
 308 #ifdef TE_SOLARIS
 309 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 310 extern void i386_solaris_fix_up_eh_frame (segT);
 311 #endif
 312
 313 /* Support for SHF_X86_64_LARGE */
 314 extern bfd_vma x86_64_section_word (char *, size_t);
 315 extern bfd_vma x86_64_section_letter (int, const char **);
 316 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 317 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 318
 319 #ifdef TE_PE
 320
 321 #define O_secrel O_md1
 322
 323 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 324 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 325
 326 #endif /* TE_PE */
 327
 328 /* X_add_symbol:X_op_symbol (Intel mode only) */
 329 #define O_full_ptr O_md2
 330
 331 #ifdef OBJ_MACH_O
 332
 333 #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX))
 334
 335 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \
 336           (obj_mach_o_force_reloc_sub_same (FIX, SEG))
 337
 338 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \
 339         (obj_mach_o_force_reloc_sub_local (FIX, SEG))
 340
 341 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
 342
 343 #endif /* OBJ_MACH_O */
 344
 345 #endif /* TC_I386 */