gas/config/tc-m68k.h

   1 /* This file is tc-m68k.h
   2    Copyright 1987, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
   3    1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
   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 2, 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 #define TC_M68K 1
  24
  25 struct fix;
  26
  27 #define TARGET_BYTES_BIG_ENDIAN 1
  28
  29 #ifdef OBJ_AOUT
  30 #ifdef TE_SUN3
  31 #define TARGET_FORMAT "a.out-sunos-big"
  32 #endif
  33 #ifdef TE_NetBSD
  34 #define TARGET_FORMAT "a.out-m68k-netbsd"
  35 #endif
  36 #ifdef TE_LINUX
  37 #define TARGET_FORMAT "a.out-m68k-linux"
  38 #endif
  39 #ifndef TARGET_FORMAT
  40 #define TARGET_FORMAT "a.out-zero-big"
  41 #endif
  42 #endif
  43
  44 #ifdef OBJ_ELF
  45 #define TARGET_FORMAT "elf32-m68k"
  46 #endif
  47
  48 #ifdef TE_APOLLO
  49 #define COFF_MAGIC              APOLLOM68KMAGIC
  50 #define COFF_AOUTHDR_MAGIC      APOLLO_COFF_VERSION_NUMBER
  51 #undef OBJ_COFF_OMIT_OPTIONAL_HEADER
  52 #endif
  53
  54 #ifdef TE_LYNX
  55 #define TARGET_FORMAT           "coff-m68k-lynx"
  56 #endif
  57 #ifdef TE_AUX
  58 #define TARGET_FORMAT           "coff-m68k-aux"
  59 #endif
  60 #ifdef TE_DELTA
  61 #define TARGET_FORMAT           "coff-m68k-sysv"
  62 #endif
  63
  64 #ifndef COFF_MAGIC
  65 #define COFF_MAGIC MC68MAGIC
  66 #endif
  67 #define BFD_ARCH bfd_arch_m68k /* for non-BFD_ASSEMBLER */
  68 #define TARGET_ARCH bfd_arch_m68k /* BFD_ASSEMBLER */
  69 #define COFF_FLAGS F_AR32W
  70 #define TC_COUNT_RELOC(x) ((x)->fx_addsy||(x)->fx_subsy)
  71
  72 #define TC_COFF_FIX2RTYPE(FIX) tc_coff_fix2rtype(FIX)
  73 #define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag)
  74 extern int tc_coff_sizemachdep (struct frag *);
  75 #ifdef TE_SUN3
  76 /* This variable contains the value to write out at the beginning of
  77    the a.out file.  The 2<<16 means that this is a 68020 file instead
  78    of an old-style 68000 file */
  79
  80 #define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE (2<<16|OMAGIC);    /* Magic byte for file header */
  81 #endif /* TE_SUN3 */
  82
  83 #ifndef AOUT_MACHTYPE
  84 #define AOUT_MACHTYPE m68k_aout_machtype
  85 extern int m68k_aout_machtype;
  86 #endif
  87
  88 #define tc_comment_chars m68k_comment_chars
  89 extern const char *m68k_comment_chars;
  90
  91 #define tc_crawl_symbol_chain(a)        {;}     /* not used */
  92 #define tc_headers_hook(a)              {;}     /* not used */
  93 #define tc_aout_pre_write_hook(x)       {;}     /* not used */
  94
  95 #define LISTING_WORD_SIZE 2     /* A word is 2 bytes */
  96 #define LISTING_LHS_WIDTH 2     /* One word on the first line */
  97 #define LISTING_LHS_WIDTH_SECOND 2      /* One word on the second line */
  98 #define LISTING_LHS_CONT_LINES 4/* And 4 lines max */
  99 #define LISTING_HEADER "68K GAS "
 100
 101 #ifndef REGISTER_PREFIX
 102 #define REGISTER_PREFIX '%'
 103 #endif
 104
 105 #if !defined (REGISTER_PREFIX_OPTIONAL)
 106 #if defined (M68KCOFF) || defined (OBJ_ELF)
 107 #ifndef BFD_ASSEMBLER
 108 #define LOCAL_LABEL(name) (name[0] == '.' \
 109                            && (name[1] == 'L' || name[1] == '.'))
 110 #endif /* ! BFD_ASSEMBLER */
 111 #define REGISTER_PREFIX_OPTIONAL 0
 112 #else /* ! (COFF || ELF) */
 113 #define REGISTER_PREFIX_OPTIONAL 1
 114 #endif /* ! (COFF || ELF) */
 115 #endif /* not def REGISTER_PREFIX and not def OPTIONAL_REGISTER_PREFIX */
 116
 117 #ifdef TE_DELTA
 118 /* On the Delta, `%' can occur within a label name, but not as the
 119    initial character.  */
 120 #define LEX_PCT LEX_NAME
 121 /* On the Delta, `~' can start a label name, but is converted to '.'.  */
 122 #define LEX_TILDE LEX_BEGIN_NAME
 123 #define tc_canonicalize_symbol_name(s) ((*(s) == '~' ? *(s) = '.' : '.'), s)
 124 /* On the Delta, dots are not required before pseudo-ops.  */
 125 #define NO_PSEUDO_DOT 1
 126 #ifndef BFD_ASSEMBLER
 127 #undef LOCAL_LABEL
 128 #define LOCAL_LABEL(name) \
 129   (name[0] == '.' || (name[0] == 'L' && name[1] == '%'))
 130 #endif
 131 #endif
 132
 133 extern void m68k_mri_mode_change (int);
 134 #define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)
 135
 136 extern int m68k_conditional_pseudoop (pseudo_typeS *);
 137 #define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)
 138
 139 extern void m68k_frob_label (symbolS *);
 140 #define tc_frob_label(sym) m68k_frob_label (sym)
 141
 142 extern void m68k_flush_pending_output (void);
 143 #define md_flush_pending_output() m68k_flush_pending_output ()
 144
 145 extern void m68k_frob_symbol (symbolS *);
 146
 147 #ifdef BFD_ASSEMBLER
 148
 149 #define tc_frob_symbol(sym,punt)                                \
 150 do                                                              \
 151   {                                                             \
 152     if (S_GET_SEGMENT (sym) == reg_section)                     \
 153       punt = 1;                                                 \
 154     m68k_frob_symbol (sym);                                     \
 155   }                                                             \
 156 while (0)
 157
 158 #define NO_RELOC BFD_RELOC_NONE
 159 #define RELAX_RELOC_ABS8  BFD_RELOC_8
 160 #define RELAX_RELOC_ABS16 BFD_RELOC_16
 161 #define RELAX_RELOC_ABS32 BFD_RELOC_32
 162 #define RELAX_RELOC_PC8   BFD_RELOC_8_PCREL
 163 #define RELAX_RELOC_PC16  BFD_RELOC_16_PCREL
 164 #define RELAX_RELOC_PC32  BFD_RELOC_32_PCREL
 165
 166 #ifdef OBJ_ELF
 167 #define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
 168 extern int tc_m68k_fix_adjustable (struct fix *);
 169
 170 /* Target *-*-elf implies an embedded target.  No shared libs.
 171    *-*-uclinux also requires special casing to prevent GAS from
 172    generating unsupported R_68K_PC16 relocs.  */
 173 #define EXTERN_FORCE_RELOC \
 174   ((strcmp (TARGET_OS, "elf") != 0) && (strcmp (TARGET_OS, "uclinux") != 0))
 175
 176 /* Values passed to md_apply_fix don't include symbol values.  */
 177 #define MD_APPLY_SYM_VALUE(FIX) 0
 178
 179 #define elf_tc_final_processing m68k_elf_final_processing
 180 extern void m68k_elf_final_processing (void);
 181 #endif
 182
 183 #else /* ! BFD_ASSEMBLER */
 184
 185 #define tc_frob_coff_symbol(sym) m68k_frob_symbol (sym)
 186
 187 #define NO_RELOC          0
 188 #define RELAX_RELOC_ABS8  0
 189 #define RELAX_RELOC_ABS16 0
 190 #define RELAX_RELOC_ABS32 0
 191 #define RELAX_RELOC_PC8   0
 192 #define RELAX_RELOC_PC16  0
 193 #define RELAX_RELOC_PC32  0
 194
 195 #endif /* ! BFD_ASSEMBLER */
 196
 197 #define DIFF_EXPR_OK
 198
 199 extern void m68k_init_after_args (void);
 200 #define tc_init_after_args m68k_init_after_args
 201
 202 extern int m68k_parse_long_option (char *);
 203 #define md_parse_long_option m68k_parse_long_option
 204
 205 #define md_operand(x)
 206
 207 #define TARGET_ARCH bfd_arch_m68k
 208
 209 extern struct relax_type md_relax_table[];
 210 #define TC_GENERIC_RELAX_TABLE md_relax_table
 211
 212 /* We can't do a byte jump to the next instruction, so in that case
 213    force word mode by faking AIM.  */
 214 #define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
 215   do                                                                      \
 216     {                                                                     \
 217       if (aim == 0 && this_type->rlx_forward == 127)                      \
 218         aim = 128;                                                        \
 219     }                                                                     \
 220   while (0)
 221
 222 #define DWARF2_LINE_MIN_INSN_LENGTH 2
 223
 224 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 225 #define TARGET_USE_CFIPOP 1
 226
 227 #define DWARF2_DEFAULT_RETURN_COLUMN 24
 228 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
 229
 230 #define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum
 231 extern int tc_m68k_regname_to_dw2regnum (const char *regname);
 232
 233 #define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions
 234 extern void tc_m68k_frame_initial_instructions (void);