gas/config/tc-i386.h

   1 /* tc-i386.h -- Header file for tc-i386.c
   2    Copyright (C) 1989-2019 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 #elif defined TE_CLOUDABI
  67 #define ELF_TARGET_FORMAT64     "elf64-x86-64-cloudabi"
  68 #endif
  69
  70 #ifdef TE_SOLARIS
  71 #define ELF_TARGET_FORMAT       "elf32-i386-sol2"
  72 #define ELF_TARGET_FORMAT64     "elf64-x86-64-sol2"
  73 #endif
  74
  75 #ifndef ELF_TARGET_FORMAT
  76 #define ELF_TARGET_FORMAT       "elf32-i386"
  77 #endif
  78
  79 #ifndef ELF_TARGET_FORMAT64
  80 #define ELF_TARGET_FORMAT64     "elf64-x86-64"
  81 #endif
  82
  83 #ifndef ELF_TARGET_FORMAT32
  84 #define ELF_TARGET_FORMAT32     "elf32-x86-64"
  85 #endif
  86
  87 #ifndef ELF_TARGET_L1OM_FORMAT
  88 #define ELF_TARGET_L1OM_FORMAT  "elf64-l1om"
  89 #endif
  90
  91 #ifndef ELF_TARGET_K1OM_FORMAT
  92 #define ELF_TARGET_K1OM_FORMAT  "elf64-k1om"
  93 #endif
  94
  95 #ifndef ELF_TARGET_IAMCU_FORMAT
  96 #define ELF_TARGET_IAMCU_FORMAT "elf32-iamcu"
  97 #endif
  98
  99 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
 100      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
 101      || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
 102 extern const char *i386_target_format (void);
 103 #define TARGET_FORMAT i386_target_format ()
 104 #else
 105 #ifdef TE_GO32
 106 #define TARGET_FORMAT           "coff-go32"
 107 #endif
 108 #ifdef OBJ_AOUT
 109 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
 110 #endif
 111 #endif
 112
 113 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
 114
 115 /* '$' may be used as immediate prefix.  */
 116 #undef LOCAL_LABELS_DOLLAR
 117 #define LOCAL_LABELS_DOLLAR 0
 118 #undef LOCAL_LABELS_FB
 119 #define LOCAL_LABELS_FB 1
 120
 121 extern const char extra_symbol_chars[];
 122 #define tc_symbol_chars extra_symbol_chars
 123
 124 extern const char *i386_comment_chars;
 125 #define tc_comment_chars i386_comment_chars
 126
 127 /* The name of the global offset table generated by the compiler. Allow
 128    this to be overridden if need be.  */
 129 #ifndef GLOBAL_OFFSET_TABLE_NAME
 130 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 131 #endif
 132
 133 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 134 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 135 #endif
 136 extern bfd_reloc_code_real_type x86_cons (expressionS *, int);
 137
 138 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC)     \
 139   x86_cons_fix_new(FRAG, OFF, LEN, EXP, RELOC)
 140 extern void x86_cons_fix_new
 141 (fragS *, unsigned int, unsigned int, expressionS *, bfd_reloc_code_real_type);
 142
 143 #define TC_ADDRESS_BYTES x86_address_bytes
 144 extern int x86_address_bytes (void);
 145
 146 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 147
 148 #define NO_RELOC BFD_RELOC_NONE
 149
 150 void i386_validate_fix (struct fix *);
 151 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 152
 153 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 154 extern int tc_i386_fix_adjustable (struct fix *);
 155
 156 /* Values passed to md_apply_fix don't include the symbol value.  */
 157 #define MD_APPLY_SYM_VALUE(FIX) 0
 158
 159 /* ELF wants external syms kept, as does PE COFF.  */
 160 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 161 #define EXTERN_FORCE_RELOC                              \
 162   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 163    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 164 #else
 165 #define EXTERN_FORCE_RELOC                              \
 166   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 167 #endif
 168
 169 /* This expression evaluates to true if the relocation is for a local
 170    object for which we still want to do the relocation at runtime.
 171    False if we are willing to perform this relocation while building
 172    the .o file.  GOTOFF and GOT32 do not need to be checked here because
 173    they are not pcrel.  .*/
 174
 175 #define TC_FORCE_RELOCATION_LOCAL(FIX)                          \
 176   (GENERIC_FORCE_RELOCATION_LOCAL (FIX)                         \
 177    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32                   \
 178    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC                   \
 179    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL             \
 180    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX            \
 181    || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX)
 182
 183 extern int i386_parse_name (char *, expressionS *, char *);
 184 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 185
 186 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 187 #define md_operator i386_operator
 188
 189 extern int i386_need_index_operator (void);
 190 #define md_need_index_operator i386_need_index_operator
 191
 192 #define md_register_arithmetic 0
 193
 194 extern const struct relax_type md_relax_table[];
 195 #define TC_GENERIC_RELAX_TABLE md_relax_table
 196
 197 extern int optimize_align_code;
 198
 199 #define md_do_align(n, fill, len, max, around)                          \
 200 if ((n)                                                                 \
 201     && !need_pass_2                                                     \
 202     && optimize_align_code                                              \
 203     && (!(fill)                                                         \
 204         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 205     && subseg_text_p (now_seg))                                         \
 206   {                                                                     \
 207     frag_align_code ((n), (max));                                       \
 208     goto around;                                                        \
 209   }
 210
 211 #define MAX_MEM_FOR_RS_ALIGN_CODE  (alignment ? ((1 << alignment) - 1) : 1)
 212
 213 void i386_print_statistics (FILE *);
 214 #define tc_print_statistics i386_print_statistics
 215
 216 extern unsigned int i386_frag_max_var (fragS *);
 217 #define md_frag_max_var i386_frag_max_var
 218
 219 #define md_number_to_chars number_to_chars_littleendian
 220
 221 enum processor_type
 222 {
 223   PROCESSOR_UNKNOWN,
 224   PROCESSOR_I386,
 225   PROCESSOR_I486,
 226   PROCESSOR_PENTIUM,
 227   PROCESSOR_PENTIUMPRO,
 228   PROCESSOR_PENTIUM4,
 229   PROCESSOR_NOCONA,
 230   PROCESSOR_CORE,
 231   PROCESSOR_CORE2,
 232   PROCESSOR_COREI7,
 233   PROCESSOR_L1OM,
 234   PROCESSOR_K1OM,
 235   PROCESSOR_IAMCU,
 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   unsigned int max_bytes;
 257 };
 258
 259 /* We need to emit the right NOP pattern in .align frags.  This is
 260    done after the text-to-bits assembly pass, so we need to mark it with
 261    the isa/tune settings at the time the .align was assembled.  */
 262 #define TC_FRAG_TYPE struct i386_tc_frag_data
 263
 264 #define TC_FRAG_INIT(FRAGP, MAX_BYTES)                          \
 265  do                                                             \
 266    {                                                            \
 267      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 268      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 269      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 270      (FRAGP)->tc_frag_data.max_bytes = (MAX_BYTES);             \
 271    }                                                            \
 272  while (0)
 273
 274 #define WORKING_DOT_WORD 1
 275
 276 /* How to generate NOPs for .nop direct directive.  */
 277 extern void i386_generate_nops (fragS *, char *, offsetT, int);
 278 #define md_generate_nops(frag, where, amount, control) \
 279   i386_generate_nops ((frag), (where), (amount), (control))
 280
 281 #define HANDLE_ALIGN(fragP)                                             \
 282 if (fragP->fr_type == rs_align_code)                                    \
 283   {                                                                     \
 284     offsetT __count = (fragP->fr_next->fr_address                       \
 285                        - fragP->fr_address                              \
 286                        - fragP->fr_fix);                                \
 287     if (__count > 0                                                     \
 288         && (unsigned int) __count <= fragP->tc_frag_data.max_bytes)     \
 289       md_generate_nops (fragP, fragP->fr_literal + fragP->fr_fix,       \
 290                         __count, 0);                                    \
 291   }
 292
 293 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 294 #define TARGET_USE_CFIPOP 1
 295
 296 extern unsigned int x86_dwarf2_return_column;
 297 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 298
 299 extern int x86_cie_data_alignment;
 300 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 301
 302 extern int x86_dwarf2_addr_size (void);
 303 #define DWARF2_ADDR_SIZE(bfd) x86_dwarf2_addr_size ()
 304
 305 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 306 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 307
 308 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 309 extern void tc_x86_frame_initial_instructions (void);
 310
 311 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 312 extern int i386_elf_section_type (const char *, size_t);
 313
 314 #ifdef TE_SOLARIS
 315 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 316 extern void i386_solaris_fix_up_eh_frame (segT);
 317 #endif
 318
 319 /* Support for SHF_X86_64_LARGE */
 320 extern bfd_vma x86_64_section_word (char *, size_t);
 321 extern bfd_vma x86_64_section_letter (int, const char **);
 322 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 323 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 324
 325 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
 326 extern void x86_cleanup (void);
 327 #define md_cleanup() x86_cleanup ()
 328 #endif
 329
 330 #ifdef TE_PE
 331
 332 #define O_secrel O_md1
 333
 334 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 335 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 336
 337 #endif /* TE_PE */
 338
 339 /* X_add_symbol:X_op_symbol (Intel mode only) */
 340 #define O_full_ptr O_md2
 341
 342 #ifdef OBJ_MACH_O
 343
 344 #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX))
 345
 346 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \
 347           (obj_mach_o_force_reloc_sub_same (FIX, SEG))
 348
 349 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \
 350         (obj_mach_o_force_reloc_sub_local (FIX, SEG))
 351
 352 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
 353
 354 #endif /* OBJ_MACH_O */
 355
 356 #endif /* TC_I386 */