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      || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
  76 extern const char *i386_target_format (void);
  77 #define TARGET_FORMAT i386_target_format ()
  78 #else
  79 #ifdef OBJ_AOUT
  80 #define TARGET_FORMAT           AOUT_TARGET_FORMAT
  81 #endif
  82 #endif
  83
  84 #if (defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF))
  85 #define md_end i386_elf_emit_arch_note
  86 extern void i386_elf_emit_arch_note (void);
  87 #endif
  88
  89 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
  90
  91 /* '$' may be used as immediate prefix.  */
  92 #undef LOCAL_LABELS_DOLLAR
  93 #define LOCAL_LABELS_DOLLAR 0
  94 #undef LOCAL_LABELS_FB
  95 #define LOCAL_LABELS_FB 1
  96
  97 extern const char extra_symbol_chars[];
  98 #define tc_symbol_chars extra_symbol_chars
  99
 100 extern const char *i386_comment_chars;
 101 #define tc_comment_chars i386_comment_chars
 102
 103 /* The name of the global offset table generated by the compiler. Allow
 104    this to be overridden if need be.  */
 105 #ifndef GLOBAL_OFFSET_TABLE_NAME
 106 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 107 #endif
 108
 109 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
 110 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
 111 extern void x86_cons (expressionS *, int);
 112 #endif
 113
 114 #define TC_CONS_FIX_NEW(FRAG,OFF,LEN,EXP) x86_cons_fix_new(FRAG, OFF, LEN, EXP)
 115 extern void x86_cons_fix_new
 116   (fragS *, unsigned int, unsigned int, expressionS *);
 117
 118 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
 119
 120 #define NO_RELOC BFD_RELOC_NONE
 121
 122 void i386_validate_fix (struct fix *);
 123 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
 124
 125 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
 126 extern int tc_i386_fix_adjustable (struct fix *);
 127
 128 /* Values passed to md_apply_fix don't include the symbol value.  */
 129 #define MD_APPLY_SYM_VALUE(FIX) 0
 130
 131 /* ELF wants external syms kept, as does PE COFF.  */
 132 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
 133 #define EXTERN_FORCE_RELOC                              \
 134   (OUTPUT_FLAVOR == bfd_target_elf_flavour              \
 135    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
 136 #else
 137 #define EXTERN_FORCE_RELOC                              \
 138   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
 139 #endif
 140
 141 /* BSF_GNU_INDIRECT_FUNCTION symbols always need relocatoon.  */
 142 #define TC_FORCE_RELOCATION(FIX)                        \
 143   ((symbol_get_bfdsym ((FIX)->fx_addsy)->flags          \
 144     & BSF_GNU_INDIRECT_FUNCTION)                        \
 145    || generic_force_reloc (FIX))
 146
 147 /* This expression evaluates to true if the relocation is for a local
 148    object for which we still want to do the relocation at runtime.
 149    False if we are willing to perform this relocation while building
 150    the .o file.  GOTOFF does not need to be checked here because it is
 151    not pcrel.  I am not sure if some of the others are ever used with
 152    pcrel, but it is easier to be safe than sorry.  */
 153
 154 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 155   (!(FIX)->fx_pcrel                                     \
 156    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32           \
 157    || (FIX)->fx_r_type == BFD_RELOC_386_GOT32           \
 158    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC           \
 159    || TC_FORCE_RELOCATION (FIX))
 160
 161 extern int i386_parse_name (char *, expressionS *, char *);
 162 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
 163
 164 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
 165 #define md_operator i386_operator
 166
 167 extern int i386_need_index_operator (void);
 168 #define md_need_index_operator i386_need_index_operator
 169
 170 #define md_register_arithmetic 0
 171
 172 extern const struct relax_type md_relax_table[];
 173 #define TC_GENERIC_RELAX_TABLE md_relax_table
 174
 175 extern int optimize_align_code;
 176
 177 #define md_do_align(n, fill, len, max, around)                          \
 178 if ((n)                                                                 \
 179     && !need_pass_2                                                     \
 180     && optimize_align_code                                              \
 181     && (!(fill)                                                         \
 182         || ((char)*(fill) == (char)0x90 && (len) == 1))                 \
 183     && subseg_text_p (now_seg))                                         \
 184   {                                                                     \
 185     frag_align_code ((n), (max));                                       \
 186     goto around;                                                        \
 187   }
 188
 189 #define MAX_MEM_FOR_RS_ALIGN_CODE  31
 190
 191 extern void i386_align_code (fragS *, int);
 192
 193 #define HANDLE_ALIGN(fragP)                                             \
 194 if (fragP->fr_type == rs_align_code)                                    \
 195   i386_align_code (fragP, (fragP->fr_next->fr_address                   \
 196                            - fragP->fr_address                          \
 197                            - fragP->fr_fix));
 198
 199 void i386_print_statistics (FILE *);
 200 #define tc_print_statistics i386_print_statistics
 201
 202 #define md_number_to_chars number_to_chars_littleendian
 203
 204 enum processor_type
 205 {
 206   PROCESSOR_UNKNOWN,
 207   PROCESSOR_I386,
 208   PROCESSOR_I486,
 209   PROCESSOR_PENTIUM,
 210   PROCESSOR_PENTIUMPRO,
 211   PROCESSOR_PENTIUM4,
 212   PROCESSOR_NOCONA,
 213   PROCESSOR_CORE,
 214   PROCESSOR_CORE2,
 215   PROCESSOR_COREI7,
 216   PROCESSOR_K6,
 217   PROCESSOR_ATHLON,
 218   PROCESSOR_K8,
 219   PROCESSOR_GENERIC32,
 220   PROCESSOR_GENERIC64,
 221   PROCESSOR_AMDFAM10
 222 };
 223
 224 extern enum processor_type cpu_arch_tune;
 225 extern enum processor_type cpu_arch_isa;
 226 extern i386_cpu_flags cpu_arch_isa_flags;
 227
 228 struct i386_tc_frag_data
 229 {
 230   enum processor_type isa;
 231   i386_cpu_flags isa_flags;
 232   enum processor_type tune;
 233 };
 234
 235 /* We need to emit the right NOP pattern in .align frags.  This is
 236    done after the text-to-bits assembly pass, so we need to mark it with
 237    the isa/tune settings at the time the .align was assembled.  */
 238 #define TC_FRAG_TYPE struct i386_tc_frag_data
 239
 240 #define TC_FRAG_INIT(FRAGP)                                     \
 241  do                                                             \
 242    {                                                            \
 243      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;                  \
 244      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;      \
 245      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;                \
 246    }                                                            \
 247  while (0)
 248
 249 #ifdef SCO_ELF
 250 #define tc_init_after_args() sco_id ()
 251 extern void sco_id (void);
 252 #endif
 253
 254 #define WORKING_DOT_WORD 1
 255
 256 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 257 #define TARGET_USE_CFIPOP 1
 258
 259 extern unsigned int x86_dwarf2_return_column;
 260 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
 261
 262 extern int x86_cie_data_alignment;
 263 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
 264
 265 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
 266 extern void tc_x86_parse_to_dw2regnum (expressionS *);
 267
 268 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
 269 extern void tc_x86_frame_initial_instructions (void);
 270
 271 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
 272 extern int i386_elf_section_type (const char *, size_t);
 273
 274 #ifdef TE_SOLARIS
 275 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
 276 extern void i386_solaris_fix_up_eh_frame (segT);
 277 #endif
 278
 279 /* Support for SHF_X86_64_LARGE */
 280 extern bfd_vma x86_64_section_word (char *, size_t);
 281 extern bfd_vma x86_64_section_letter (int, char **);
 282 #define md_elf_section_letter(LETTER, PTR_MSG)  x86_64_section_letter (LETTER, PTR_MSG)
 283 #define md_elf_section_word(STR, LEN)           x86_64_section_word (STR, LEN)
 284
 285 #ifdef TE_PE
 286
 287 #define O_secrel O_md1
 288
 289 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 290 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 291
 292 #endif /* TE_PE */
 293
 294 /* X_add_symbol:X_op_symbol (Intel mode only) */
 295 #define O_full_ptr O_md2
 296
 297 #endif /* TC_I386 */