gas/config/tc-i386.h

   1 /* tc-i386.h -- Header file for tc-i386.c
   2    Copyright (C) 1989-2021 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_CLOUDABI
  63 #define ELF_TARGET_FORMAT64     "elf64-x86-64-cloudabi"
  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_FORMAT32
  80 #define ELF_TARGET_FORMAT32     "elf32-x86-64"
  81 #endif
  82
  83 #ifndef ELF_TARGET_L1OM_FORMAT
  84 #define ELF_TARGET_L1OM_FORMAT  "elf64-l1om"
  85 #endif
  86
  87 #ifndef ELF_TARGET_K1OM_FORMAT
  88 #define ELF_TARGET_K1OM_FORMAT  "elf64-k1om"
  89 #endif
  90
  91 #ifndef ELF_TARGET_IAMCU_FORMAT
  92 #define ELF_TARGET_IAMCU_FORMAT "elf32-iamcu"
  93 #endif
  94
  95 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
  96      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
  97      || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
  98 extern const char *i386_target_format (void);
  99 #define TARGET_FORMAT i386_target_format ()
 100 #else
 101 #ifdef TE_GO32
 102 #define TARGET_FORMAT           "coff-go32"
 103 #endif
 104 #ifdef OBJ_AOUT
 105 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
 106 #endif
 107 #endif
 108
 109 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
 110
 111 /* '$' may be used as immediate prefix.  */
 112 #undef LOCAL_LABELS_DOLLAR
 113 #define LOCAL_LABELS_DOLLAR 0
 114 #undef LOCAL_LABELS_FB
 115 #define LOCAL_LABELS_FB 1
 116
 117 extern const char extra_symbol_chars[];
 118 #define tc_symbol_chars extra_symbol_chars
 119
 120 extern const char *i386_comment_chars;
 121 #define tc_comment_chars i386_comment_chars
 122
 123 /* The name of the global offset table generated by the compiler. Allow
 124    this to be overridden if need be.  */
 125 #ifndef GLOBAL_OFFSET_TABLE_NAME
 126 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 127 #endif
 128
 129 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 130 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 131 #endif
 132 extern bfd_reloc_code_real_type x86_cons (expressionS *, int);
 133
 134 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC)     \
 135   x86_cons_fix_new(FRAG, OFF, LEN, EXP, RELOC)
 136 extern void x86_cons_fix_new
 137 (fragS *, unsigned int, unsigned int, expressionS *, bfd_reloc_code_real_type);
 138
 139 #define TC_ADDRESS_BYTES x86_address_bytes
 140 extern int x86_address_bytes (void);
 141
 142 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 143
 144 #define NO_RELOC BFD_RELOC_NONE
 145
 146 void i386_validate_fix (struct fix *);
 147 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 148
 149 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 150 extern int tc_i386_fix_adjustable (struct fix *);
 151
 152 /* Values passed to md_apply_fix don't include the symbol value.  */
 153 #define MD_APPLY_SYM_VALUE(FIX) 0
 154
 155 /* ELF wants external syms kept, as does PE COFF.  */
 156 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 157 #define EXTERN_FORCE_RELOC                              \
 158   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 159    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 160 #else
 161 #define EXTERN_FORCE_RELOC                              \
 162   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 163 #endif
 164
 165 /* This expression evaluates to true if the relocation is for a local
 166    object for which we still want to do the relocation at runtime.
 167    False if we are willing to perform this relocation while building
 168    the .o file.  GOTOFF and GOT32 do not need to be checked here because
 169    they are not pcrel.  .*/
 170
 171 #define TC_FORCE_RELOCATION_LOCAL(FIX)                          \
 172   (GENERIC_FORCE_RELOCATION_LOCAL (FIX)                         \
 173    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32                   \
 174    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC                   \
 175    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL             \
 176    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX            \
 177    || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX)
 178
 179 #define TC_FORCE_RELOCATION_ABS(FIX)                            \
 180   (TC_FORCE_RELOCATION (FIX)                                    \
 181    || (FIX)->fx_r_type == BFD_RELOC_386_GOT32                   \
 182    || (FIX)->fx_r_type == BFD_RELOC_386_GOT32X                  \
 183    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL             \
 184    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX            \
 185    || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX)
 186
 187 extern int i386_parse_name (char *, expressionS *, char *);
 188 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 189
 190 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 191 #define md_operator i386_operator
 192
 193 extern int i386_need_index_operator (void);
 194 #define md_need_index_operator i386_need_index_operator
 195
 196 #define md_register_arithmetic 0
 197
 198 extern const struct relax_type md_relax_table[];
 199 #define TC_GENERIC_RELAX_TABLE md_relax_table
 200
 201 extern int optimize_align_code;
 202
 203 #define md_do_align(n, fill, len, max, around)                          \
 204 if ((n)                                                                 \
 205     && !need_pass_2                                                     \
 206     && optimize_align_code                                              \
 207     && (!(fill)                                                         \
 208         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 209     && subseg_text_p (now_seg))                                         \
 210   {                                                                     \
 211     frag_align_code ((n), (max));                                       \
 212     goto around;                                                        \
 213   }
 214
 215 #define MAX_MEM_FOR_RS_ALIGN_CODE  (alignment ? ((1 << alignment) - 1) : 1)
 216
 217 extern void i386_cons_align (int);
 218 #define md_cons_align(nbytes) i386_cons_align (nbytes)
 219
 220 void i386_print_statistics (FILE *);
 221 #define tc_print_statistics i386_print_statistics
 222
 223 extern unsigned int i386_frag_max_var (fragS *);
 224 #define md_frag_max_var i386_frag_max_var
 225
 226 extern long i386_generic_table_relax_frag (segT, fragS *, long);
 227 #define md_generic_table_relax_frag(segment, fragP, stretch) \
 228   i386_generic_table_relax_frag (segment, fragP, stretch)
 229
 230 #define md_number_to_chars number_to_chars_littleendian
 231
 232 enum processor_type
 233 {
 234   PROCESSOR_UNKNOWN,
 235   PROCESSOR_I386,
 236   PROCESSOR_I486,
 237   PROCESSOR_PENTIUM,
 238   PROCESSOR_PENTIUMPRO,
 239   PROCESSOR_PENTIUM4,
 240   PROCESSOR_NOCONA,
 241   PROCESSOR_CORE,
 242   PROCESSOR_CORE2,
 243   PROCESSOR_COREI7,
 244   PROCESSOR_L1OM,
 245   PROCESSOR_K1OM,
 246   PROCESSOR_IAMCU,
 247   PROCESSOR_K6,
 248   PROCESSOR_ATHLON,
 249   PROCESSOR_K8,
 250   PROCESSOR_GENERIC32,
 251   PROCESSOR_GENERIC64,
 252   PROCESSOR_AMDFAM10,
 253   PROCESSOR_BD,
 254   PROCESSOR_ZNVER,
 255   PROCESSOR_BT
 256 };
 257
 258 extern enum processor_type cpu_arch_tune;
 259 extern enum processor_type cpu_arch_isa;
 260 extern i386_cpu_flags cpu_arch_isa_flags;
 261
 262 struct i386_tc_frag_data
 263 {
 264   union
 265     {
 266       fragS *padding_fragP;
 267       fragS *branch_fragP;
 268     } u;
 269   addressT padding_address;
 270   enum processor_type isa;
 271   i386_cpu_flags isa_flags;
 272   enum processor_type tune;
 273   unsigned int max_bytes;
 274   unsigned char length;
 275   unsigned char last_length;
 276   unsigned char max_prefix_length;
 277   unsigned char prefix_length;
 278   unsigned char default_prefix;
 279   unsigned char cmp_size;
 280   unsigned int mf_type : 3;
 281   unsigned int classified : 1;
 282   unsigned int branch_type : 3;
 283 };
 284
 285 /* We need to emit the right NOP pattern in .align frags.  This is
 286    done after the text-to-bits assembly pass, so we need to mark it with
 287    the isa/tune settings at the time the .align was assembled.  */
 288 #define TC_FRAG_TYPE struct i386_tc_frag_data
 289
 290 #define TC_FRAG_INIT(FRAGP, MAX_BYTES)                          \
 291  do                                                             \
 292    {                                                            \
 293      (FRAGP)->tc_frag_data.u.padding_fragP = NULL;              \
 294      (FRAGP)->tc_frag_data.padding_address = 0;                 \
 295      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 296      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 297      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 298      (FRAGP)->tc_frag_data.max_bytes = (MAX_BYTES);             \
 299      (FRAGP)->tc_frag_data.length = 0;                          \
 300      (FRAGP)->tc_frag_data.last_length = 0;                     \
 301      (FRAGP)->tc_frag_data.max_prefix_length = 0;               \
 302      (FRAGP)->tc_frag_data.prefix_length = 0;                   \
 303      (FRAGP)->tc_frag_data.default_prefix = 0;                  \
 304      (FRAGP)->tc_frag_data.cmp_size = 0;                        \
 305      (FRAGP)->tc_frag_data.classified = 0;                      \
 306      (FRAGP)->tc_frag_data.branch_type = 0;                     \
 307      (FRAGP)->tc_frag_data.mf_type = 0;                 \
 308    }                                                            \
 309  while (0)
 310
 311 #define WORKING_DOT_WORD 1
 312
 313 /* How to generate NOPs for .nop direct directive.  */
 314 extern void i386_generate_nops (fragS *, char *, offsetT, int);
 315 #define md_generate_nops(frag, where, amount, control) \
 316   i386_generate_nops ((frag), (where), (amount), (control))
 317
 318 #define HANDLE_ALIGN(fragP)                                             \
 319 if (fragP->fr_type == rs_align_code)                                    \
 320   {                                                                     \
 321     offsetT __count = (fragP->fr_next->fr_address                       \
 322                        - fragP->fr_address                              \
 323                        - fragP->fr_fix);                                \
 324     if (__count > 0                                                     \
 325         && (unsigned int) __count <= fragP->tc_frag_data.max_bytes)     \
 326       md_generate_nops (fragP, fragP->fr_literal + fragP->fr_fix,       \
 327                         __count, 0);                                    \
 328   }
 329
 330 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 331 #define TARGET_USE_CFIPOP 1
 332
 333 extern unsigned int x86_dwarf2_return_column;
 334 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 335
 336 extern int x86_cie_data_alignment;
 337 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 338
 339 extern int x86_dwarf2_addr_size (void);
 340 #define DWARF2_ADDR_SIZE(bfd) x86_dwarf2_addr_size ()
 341
 342 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 343 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 344
 345 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 346 extern void tc_x86_frame_initial_instructions (void);
 347
 348 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 349 extern int i386_elf_section_type (const char *, size_t);
 350
 351 #ifdef TE_SOLARIS
 352 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 353 extern void i386_solaris_fix_up_eh_frame (segT);
 354 #endif
 355
 356 /* Support for SHF_X86_64_LARGE */
 357 extern bfd_vma x86_64_section_word (char *, size_t);
 358 extern bfd_vma x86_64_section_letter (int, const char **);
 359 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 360 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 361
 362 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
 363 extern void x86_cleanup (void);
 364 #define md_cleanup() x86_cleanup ()
 365 #endif
 366
 367 #ifdef TE_PE
 368
 369 #define O_secrel O_md1
 370
 371 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 372 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 373
 374 #endif /* TE_PE */
 375
 376 /* X_add_symbol:X_op_symbol (Intel mode only) */
 377 #define O_full_ptr O_md2
 378
 379 #ifdef OBJ_MACH_O
 380
 381 #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX))
 382
 383 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \
 384           (obj_mach_o_force_reloc_sub_same (FIX, SEG))
 385
 386 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \
 387         (obj_mach_o_force_reloc_sub_local (FIX, SEG))
 388
 389 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
 390
 391 #endif /* OBJ_MACH_O */
 392
 393 #endif /* TC_I386 */