gas/config/tc-i386.h

   1 /* tc-i386.h -- Header file for tc-i386.c
   2    Copyright (C) 1989-2022 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_IAMCU_FORMAT
  84 #define ELF_TARGET_IAMCU_FORMAT "elf32-iamcu"
  85 #endif
  86
  87 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
  88      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
  89      || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
  90 extern const char *i386_target_format (void);
  91 #define TARGET_FORMAT i386_target_format ()
  92 #else
  93 #ifdef TE_GO32
  94 #define TARGET_FORMAT           "coff-go32"
  95 #endif
  96 #ifdef OBJ_AOUT
  97 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
  98 #endif
  99 #endif
 100
 101 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
 102
 103 /* '$' may be used as immediate prefix.  */
 104 #undef LOCAL_LABELS_DOLLAR
 105 #define LOCAL_LABELS_DOLLAR 0
 106 #undef LOCAL_LABELS_FB
 107 #define LOCAL_LABELS_FB 1
 108
 109 extern const char extra_symbol_chars[];
 110 #define tc_symbol_chars extra_symbol_chars
 111
 112 extern const char *i386_comment_chars;
 113 #define tc_comment_chars i386_comment_chars
 114
 115 /* The name of the global offset table generated by the compiler. Allow
 116    this to be overridden if need be.  */
 117 #ifndef GLOBAL_OFFSET_TABLE_NAME
 118 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 119 #endif
 120
 121 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 122 extern bfd_reloc_code_real_type x86_cons (expressionS *, int);
 123
 124 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC)     \
 125   x86_cons_fix_new(FRAG, OFF, LEN, EXP, RELOC)
 126 extern void x86_cons_fix_new
 127 (fragS *, unsigned int, unsigned int, expressionS *, bfd_reloc_code_real_type);
 128
 129 #define X_PRECISION     5
 130 #define X_PRECISION_PAD 0
 131
 132 #define TC_ADDRESS_BYTES x86_address_bytes
 133 extern int x86_address_bytes (void);
 134
 135 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 136
 137 #define NO_RELOC BFD_RELOC_NONE
 138
 139 int i386_validate_fix (struct fix *);
 140 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) do { \
 141     if (!i386_validate_fix(FIX)) goto SKIP;      \
 142   } while (0)
 143
 144 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 145 extern int tc_i386_fix_adjustable (struct fix *);
 146
 147 /* Values passed to md_apply_fix don't include the symbol value.  */
 148 #define MD_APPLY_SYM_VALUE(FIX) 0
 149
 150 /* ELF wants external syms kept, as does PE COFF.  */
 151 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 152 #define EXTERN_FORCE_RELOC                              \
 153   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 154    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 155 #else
 156 #define EXTERN_FORCE_RELOC                              \
 157   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 158 #endif
 159
 160 /* This expression evaluates to true if the relocation is for a local
 161    object for which we still want to do the relocation at runtime.
 162    False if we are willing to perform this relocation while building
 163    the .o file.  GOTOFF and GOT32 do not need to be checked here because
 164    they are not pcrel.  .*/
 165
 166 #define TC_FORCE_RELOCATION_LOCAL(FIX)                          \
 167   (GENERIC_FORCE_RELOCATION_LOCAL (FIX)                         \
 168    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32                   \
 169    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC                   \
 170    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL             \
 171    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX            \
 172    || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX)
 173
 174 #define TC_FORCE_RELOCATION_ABS(FIX)                            \
 175   (TC_FORCE_RELOCATION (FIX)                                    \
 176    || (FIX)->fx_r_type == BFD_RELOC_386_GOT32                   \
 177    || (FIX)->fx_r_type == BFD_RELOC_386_GOT32X                  \
 178    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL             \
 179    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX            \
 180    || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX)
 181
 182 extern int i386_parse_name (char *, expressionS *, char *);
 183 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 184
 185 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 186 #define md_operator i386_operator
 187
 188 extern int i386_need_index_operator (void);
 189 #define md_need_index_operator i386_need_index_operator
 190
 191 #define md_register_arithmetic 0
 192
 193 extern const struct relax_type md_relax_table[];
 194 #define TC_GENERIC_RELAX_TABLE md_relax_table
 195
 196 extern int optimize_align_code;
 197
 198 #define md_do_align(n, fill, len, max, around)                          \
 199 if ((n)                                                                 \
 200     && !need_pass_2                                                     \
 201     && optimize_align_code                                              \
 202     && (!(fill)                                                         \
 203         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 204     && subseg_text_p (now_seg))                                         \
 205   {                                                                     \
 206     frag_align_code ((n), (max));                                       \
 207     goto around;                                                        \
 208   }
 209
 210 #define MAX_MEM_FOR_RS_ALIGN_CODE \
 211   (alignment ? ((size_t) 1 << alignment) - 1 : (size_t) 1)
 212
 213 extern void i386_cons_align (int);
 214 #define md_cons_align(nbytes) i386_cons_align (nbytes)
 215
 216 void i386_print_statistics (FILE *);
 217 #define tc_print_statistics i386_print_statistics
 218
 219 void i386_md_end (void);
 220 #define md_end i386_md_end
 221
 222 extern unsigned int i386_frag_max_var (fragS *);
 223 #define md_frag_max_var i386_frag_max_var
 224
 225 extern long i386_generic_table_relax_frag (segT, fragS *, long);
 226 #define md_generic_table_relax_frag(segment, fragP, stretch) \
 227   i386_generic_table_relax_frag (segment, fragP, stretch)
 228
 229 #define md_number_to_chars number_to_chars_littleendian
 230
 231 enum processor_type
 232 {
 233   PROCESSOR_UNKNOWN,
 234   PROCESSOR_GENERIC32,
 235   PROCESSOR_GENERIC64,
 236   PROCESSOR_I386,
 237   PROCESSOR_I486,
 238   PROCESSOR_PENTIUM,
 239   PROCESSOR_PENTIUMPRO,
 240   PROCESSOR_PENTIUM4,
 241   PROCESSOR_NOCONA,
 242   PROCESSOR_CORE,
 243   PROCESSOR_CORE2,
 244   PROCESSOR_COREI7,
 245   PROCESSOR_IAMCU,
 246   PROCESSOR_K6,
 247   PROCESSOR_ATHLON,
 248   PROCESSOR_K8,
 249   PROCESSOR_AMDFAM10,
 250   PROCESSOR_BD,
 251   PROCESSOR_ZNVER,
 252   PROCESSOR_BT,
 253   /* Keep this last.  */
 254   PROCESSOR_NONE
 255 };
 256
 257 extern enum processor_type cpu_arch_tune;
 258 extern enum processor_type cpu_arch_isa;
 259 extern i386_cpu_flags cpu_arch_isa_flags;
 260
 261 struct i386_tc_frag_data
 262 {
 263   union
 264     {
 265       fragS *padding_fragP;
 266       fragS *branch_fragP;
 267     } u;
 268   addressT padding_address;
 269   enum processor_type isa;
 270   i386_cpu_flags isa_flags;
 271   enum processor_type tune;
 272   unsigned int max_bytes;
 273   unsigned char length;
 274   unsigned char last_length;
 275   unsigned char max_prefix_length;
 276   unsigned char prefix_length;
 277   unsigned char default_prefix;
 278   unsigned char cmp_size;
 279   unsigned int mf_type : 3;
 280   unsigned int classified : 1;
 281   unsigned int branch_type : 3;
 282   unsigned int code64 : 1; /* Only set by output_branch for now.  */
 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
 366 /* Whether SFrame unwind info is supported.  */
 367 extern bool x86_support_sframe_p (void);
 368 #define support_sframe_p x86_support_sframe_p
 369
 370 /* The stack-pointer register number for SFrame unwind info.  */
 371 extern unsigned int x86_sframe_cfa_sp_reg;
 372 #define SFRAME_CFA_SP_REG x86_sframe_cfa_sp_reg
 373
 374 /* The frame-pointer register number for CFA unwind info.  */
 375 extern unsigned int x86_sframe_cfa_fp_reg;
 376 #define SFRAME_CFA_FP_REG x86_sframe_cfa_fp_reg
 377
 378 /* Specify if RA tracking is needed.  */
 379 extern bool x86_sframe_ra_tracking_p (void);
 380 #define sframe_ra_tracking_p x86_sframe_ra_tracking_p
 381
 382 /* Specify the fixed offset to recover RA from CFA.
 383    (useful only when RA tracking is not needed).  */
 384 extern offsetT x86_sframe_cfa_ra_offset (void);
 385 #define sframe_cfa_ra_offset x86_sframe_cfa_ra_offset
 386
 387 /* The abi/arch indentifier for SFrame.  */
 388 extern unsigned char x86_sframe_get_abi_arch (void);
 389 #define sframe_get_abi_arch x86_sframe_get_abi_arch
 390
 391 #endif
 392
 393 #ifdef TE_PE
 394
 395 #define O_secrel O_md1
 396
 397 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 398 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 399
 400 #endif /* TE_PE */
 401
 402 /* X_add_symbol:X_op_symbol (Intel mode only) */
 403 #define O_full_ptr O_md2
 404
 405 #ifdef OBJ_MACH_O
 406
 407 #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX))
 408
 409 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \
 410           (obj_mach_o_force_reloc_sub_same (FIX, SEG))
 411
 412 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \
 413         (obj_mach_o_force_reloc_sub_local (FIX, SEG))
 414
 415 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
 416
 417 #endif /* OBJ_MACH_O */
 418
 419 #endif /* TC_I386 */