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