gas/config/tc-i386.h

   1 /* tc-i386.h -- Header file for tc-i386.c
   2    Copyright 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GAS, the GNU Assembler.
   7
   8    GAS is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3, or (at your option)
  11    any later version.
  12
  13    GAS is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GAS; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #ifndef TC_I386
  24 #define TC_I386 1
  25
  26 #include "opcodes/i386-opc.h"
  27
  28 struct fix;
  29
  30 #define TARGET_BYTES_BIG_ENDIAN 0
  31
  32 #define TARGET_ARCH             bfd_arch_i386
  33 #define TARGET_MACH             (i386_mach ())
  34 extern unsigned long i386_mach (void);
  35
  36 #ifdef TE_FreeBSD
  37 #define AOUT_TARGET_FORMAT      "a.out-i386-freebsd"
  38 #endif
  39 #ifdef TE_NetBSD
  40 #define AOUT_TARGET_FORMAT      "a.out-i386-netbsd"
  41 #endif
  42 #ifdef TE_386BSD
  43 #define AOUT_TARGET_FORMAT      "a.out-i386-bsd"
  44 #endif
  45 #ifdef TE_LINUX
  46 #define AOUT_TARGET_FORMAT      "a.out-i386-linux"
  47 #endif
  48 #ifdef TE_Mach
  49 #define AOUT_TARGET_FORMAT      "a.out-mach3"
  50 #endif
  51 #ifdef TE_DYNIX
  52 #define AOUT_TARGET_FORMAT      "a.out-i386-dynix"
  53 #endif
  54 #ifndef AOUT_TARGET_FORMAT
  55 #define AOUT_TARGET_FORMAT      "a.out-i386"
  56 #endif
  57
  58 #ifdef TE_FreeBSD
  59 #define ELF_TARGET_FORMAT       "elf32-i386-freebsd"
  60 #define ELF_TARGET_FORMAT64     "elf64-x86-64-freebsd"
  61 #elif defined (TE_VXWORKS)
  62 #define ELF_TARGET_FORMAT       "elf32-i386-vxworks"
  63 #endif
  64
  65 #ifndef ELF_TARGET_FORMAT
  66 #define ELF_TARGET_FORMAT       "elf32-i386"
  67 #endif
  68
  69 #ifndef ELF_TARGET_FORMAT64
  70 #define ELF_TARGET_FORMAT64     "elf64-x86-64"
  71 #endif
  72
  73 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
  74      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF))
  75 extern const char *i386_target_format (void);
  76 #define TARGET_FORMAT i386_target_format ()
  77 #else
  78 #ifdef OBJ_ELF
  79 #define TARGET_FORMAT           ELF_TARGET_FORMAT
  80 #endif
  81 #ifdef OBJ_AOUT
  82 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
  83 #endif
  84 #endif
  85
  86 #if (defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF))
  87 #define md_end i386_elf_emit_arch_note
  88 extern void i386_elf_emit_arch_note (void);
  89 #endif
  90
  91 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
  92
  93 /* '$' may be used as immediate prefix.  */
  94 #undef LOCAL_LABELS_DOLLAR
  95 #define LOCAL_LABELS_DOLLAR 0
  96 #undef LOCAL_LABELS_FB
  97 #define LOCAL_LABELS_FB 1
  98
  99 extern const char extra_symbol_chars[];
 100 #define tc_symbol_chars extra_symbol_chars
 101
 102 extern const char *i386_comment_chars;
 103 #define tc_comment_chars i386_comment_chars
 104
 105 /* The name of the global offset table generated by the compiler. Allow
 106    this to be overridden if need be.  */
 107 #ifndef GLOBAL_OFFSET_TABLE_NAME
 108 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 109 #endif
 110
 111 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 112 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 113 extern void x86_cons (expressionS *, int);
 114 #endif
 115
 116 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) x86_cons_fix_new(FRAG, OFF, LEN, EXP)
 117 extern void x86_cons_fix_new
 118   (fragS *, unsigned int, unsigned int, expressionS *);
 119
 120 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 121
 122 #define NO_RELOC BFD_RELOC_NONE
 123
 124 void i386_validate_fix (struct fix *);
 125 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 126
 127 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 128 extern int tc_i386_fix_adjustable (struct fix *);
 129
 130 /* Values passed to md_apply_fix don't include the symbol value.  */
 131 #define MD_APPLY_SYM_VALUE(FIX) 0
 132
 133 /* ELF wants external syms kept, as does PE COFF.  */
 134 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 135 #define EXTERN_FORCE_RELOC                              \
 136   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 137    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 138 #else
 139 #define EXTERN_FORCE_RELOC                              \
 140   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 141 #endif
 142
 143 /* This expression evaluates to true if the relocation is for a local
 144    object for which we still want to do the relocation at runtime.
 145    False if we are willing to perform this relocation while building
 146    the .o file.  GOTOFF does not need to be checked here because it is
 147    not pcrel.  I am not sure if some of the others are ever used with
 148    pcrel, but it is easier to be safe than sorry.  */
 149
 150 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 151   (!(FIX)->fx_pcrel                                     \
 152    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32           \
 153    || (FIX)->fx_r_type == BFD_RELOC_386_GOT32           \
 154    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC           \
 155    || TC_FORCE_RELOCATION (FIX))
 156
 157 extern int i386_parse_name (char *, expressionS *, char *);
 158 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 159
 160 #define md_register_arithmetic 0
 161
 162 extern const struct relax_type md_relax_table[];
 163 #define TC_GENERIC_RELAX_TABLE md_relax_table
 164
 165 extern int optimize_align_code;
 166
 167 #define md_do_align(n, fill, len, max, around)                          \
 168 if ((n)                                                                 \
 169     && !need_pass_2                                                     \
 170     && optimize_align_code                                              \
 171     && (!(fill)                                                         \
 172         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 173     && subseg_text_p (now_seg))                                         \
 174   {                                                                     \
 175     frag_align_code ((n), (max));                                       \
 176     goto around;                                                        \
 177   }
 178
 179 #define MAX_MEM_FOR_RS_ALIGN_CODE  31
 180
 181 extern void i386_align_code (fragS *, int);
 182
 183 #define HANDLE_ALIGN(fragP)                                             \
 184 if (fragP->fr_type == rs_align_code)                                    \
 185   i386_align_code (fragP, (fragP->fr_next->fr_address                   \
 186                            - fragP->fr_address                          \
 187                            - fragP->fr_fix));
 188
 189 void i386_print_statistics (FILE *);
 190 #define tc_print_statistics i386_print_statistics
 191
 192 #define md_number_to_chars number_to_chars_littleendian
 193
 194 enum processor_type
 195 {
 196   PROCESSOR_UNKNOWN,
 197   PROCESSOR_I386,
 198   PROCESSOR_I486,
 199   PROCESSOR_PENTIUM,
 200   PROCESSOR_PENTIUMPRO,
 201   PROCESSOR_PENTIUM4,
 202   PROCESSOR_NOCONA,
 203   PROCESSOR_CORE,
 204   PROCESSOR_CORE2,
 205   PROCESSOR_COREI7,
 206   PROCESSOR_K6,
 207   PROCESSOR_ATHLON,
 208   PROCESSOR_K8,
 209   PROCESSOR_GENERIC32,
 210   PROCESSOR_GENERIC64,
 211   PROCESSOR_AMDFAM10
 212 };
 213
 214 extern enum processor_type cpu_arch_tune;
 215 extern enum processor_type cpu_arch_isa;
 216 extern i386_cpu_flags cpu_arch_isa_flags;
 217
 218 struct i386_tc_frag_data
 219 {
 220   enum processor_type isa;
 221   i386_cpu_flags isa_flags;
 222   enum processor_type tune;
 223 };
 224
 225 /* We need to emit the right NOP pattern in .align frags.  This is
 226    done after the text-to-bits assembly pass, so we need to mark it with
 227    the isa/tune settings at the time the .align was assembled.  */
 228 #define TC_FRAG_TYPE struct i386_tc_frag_data
 229
 230 #define TC_FRAG_INIT(FRAGP)                                     \
 231  do                                                             \
 232    {                                                            \
 233      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 234      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 235      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 236    }                                                            \
 237  while (0)
 238
 239 #ifdef SCO_ELF
 240 #define tc_init_after_args() sco_id ()
 241 extern void sco_id (void);
 242 #endif
 243
 244 #define WORKING_DOT_WORD 1
 245
 246 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 247 #define TARGET_USE_CFIPOP 1
 248
 249 extern unsigned int x86_dwarf2_return_column;
 250 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 251
 252 extern int x86_cie_data_alignment;
 253 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 254
 255 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 256 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 257
 258 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 259 extern void tc_x86_frame_initial_instructions (void);
 260
 261 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 262 extern int i386_elf_section_type (const char *, size_t);
 263
 264 #ifdef TE_SOLARIS
 265 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 266 extern void i386_solaris_fix_up_eh_frame (segT);
 267 #endif
 268
 269 /* Support for SHF_X86_64_LARGE */
 270 extern bfd_vma x86_64_section_word (char *, size_t);
 271 extern bfd_vma x86_64_section_letter (int, char **);
 272 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 273 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 274
 275 #ifdef TE_PE
 276
 277 #define O_secrel O_md1
 278
 279 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 280 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 281
 282 #endif /* TE_PE */
 283
 284 #endif /* TC_I386 */