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
   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, 59 Temple Place - Suite 330, Boston, MA
  21    02111-1307, USA.  */
  22
  23 #define TC_M68K 1
  24
  25 #ifdef ANSI_PROTOTYPES
  26 struct fix;
  27 #endif
  28
  29 #define TARGET_BYTES_BIG_ENDIAN 1
  30
  31 #ifdef OBJ_AOUT
  32 #ifdef TE_SUN3
  33 #define TARGET_FORMAT "a.out-sunos-big"
  34 #endif
  35 #ifdef TE_NetBSD
  36 #define TARGET_FORMAT "a.out-m68k-netbsd"
  37 #endif
  38 #ifdef TE_LINUX
  39 #define TARGET_FORMAT "a.out-m68k-linux"
  40 #endif
  41 #ifndef TARGET_FORMAT
  42 #define TARGET_FORMAT "a.out-zero-big"
  43 #endif
  44 #endif
  45
  46 #ifdef OBJ_ELF
  47 #define TARGET_FORMAT "elf32-m68k"
  48 #endif
  49
  50 #ifdef TE_APOLLO
  51 #define COFF_MAGIC              APOLLOM68KMAGIC
  52 #define COFF_AOUTHDR_MAGIC      APOLLO_COFF_VERSION_NUMBER
  53 #undef OBJ_COFF_OMIT_OPTIONAL_HEADER
  54 #endif
  55
  56 #ifdef TE_LYNX
  57 #define TARGET_FORMAT           "coff-m68k-lynx"
  58 #endif
  59 #ifdef TE_AUX
  60 #define TARGET_FORMAT           "coff-m68k-aux"
  61 #endif
  62 #ifdef TE_DELTA
  63 #define TARGET_FORMAT           "coff-m68k-sysv"
  64 #endif
  65
  66 #ifndef COFF_MAGIC
  67 #define COFF_MAGIC MC68MAGIC
  68 #endif
  69 #define BFD_ARCH bfd_arch_m68k /* for non-BFD_ASSEMBLER */
  70 #define TARGET_ARCH bfd_arch_m68k /* BFD_ASSEMBLER */
  71 #define COFF_FLAGS F_AR32W
  72 #define TC_COUNT_RELOC(x) ((x)->fx_addsy||(x)->fx_subsy)
  73
  74 #define TC_COFF_FIX2RTYPE(fixP) tc_coff_fix2rtype(fixP)
  75 #define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag)
  76 extern int tc_coff_sizemachdep PARAMS ((struct frag *));
  77 #ifdef TE_SUN3
  78 /* This variable contains the value to write out at the beginning of
  79    the a.out file.  The 2<<16 means that this is a 68020 file instead
  80    of an old-style 68000 file */
  81
  82 #define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE (2<<16|OMAGIC);    /* Magic byte for file header */
  83 #endif /* TE_SUN3 */
  84
  85 #ifndef AOUT_MACHTYPE
  86 #define AOUT_MACHTYPE m68k_aout_machtype
  87 extern int m68k_aout_machtype;
  88 #endif
  89
  90 #define tc_comment_chars m68k_comment_chars
  91 extern const char *m68k_comment_chars;
  92
  93 #define tc_crawl_symbol_chain(a)        {;}     /* not used */
  94 #define tc_headers_hook(a)              {;}     /* not used */
  95 #define tc_aout_pre_write_hook(x)       {;}     /* not used */
  96
  97 #define LISTING_WORD_SIZE 2     /* A word is 2 bytes */
  98 #define LISTING_LHS_WIDTH 2     /* One word on the first line */
  99 #define LISTING_LHS_WIDTH_SECOND 2      /* One word on the second line */
 100 #define LISTING_LHS_CONT_LINES 4/* And 4 lines max */
 101 #define LISTING_HEADER "68K GAS "
 102
 103 #ifndef REGISTER_PREFIX
 104 #define REGISTER_PREFIX '%'
 105 #endif
 106
 107 #if !defined (REGISTER_PREFIX_OPTIONAL)
 108 #if defined (M68KCOFF) || defined (OBJ_ELF)
 109 #ifndef BFD_ASSEMBLER
 110 #define LOCAL_LABEL(name) (name[0] == '.' \
 111                            && (name[1] == 'L' || name[1] == '.'))
 112 #endif /* ! BFD_ASSEMBLER */
 113 #define REGISTER_PREFIX_OPTIONAL 0
 114 #else /* ! (COFF || ELF) */
 115 #define REGISTER_PREFIX_OPTIONAL 1
 116 #endif /* ! (COFF || ELF) */
 117 #endif /* not def REGISTER_PREFIX and not def OPTIONAL_REGISTER_PREFIX */
 118
 119 #ifdef TE_DELTA
 120 /* On the Delta, `%' can occur within a label name, but not as the
 121    initial character.  */
 122 #define LEX_PCT LEX_NAME
 123 /* On the Delta, `~' can start a label name, but is converted to '.'.  */
 124 #define LEX_TILDE LEX_BEGIN_NAME
 125 #define tc_canonicalize_symbol_name(s) ((*(s) == '~' ? *(s) = '.' : '.'), s)
 126 /* On the Delta, dots are not required before pseudo-ops.  */
 127 #define NO_PSEUDO_DOT 1
 128 #ifndef BFD_ASSEMBLER
 129 #undef LOCAL_LABEL
 130 #define LOCAL_LABEL(name) \
 131   (name[0] == '.' || (name[0] == 'L' && name[1] == '%'))
 132 #endif
 133 #endif
 134
 135 extern void m68k_mri_mode_change PARAMS ((int));
 136 #define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)
 137
 138 extern int m68k_conditional_pseudoop PARAMS ((pseudo_typeS *));
 139 #define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)
 140
 141 extern void m68k_frob_label PARAMS ((symbolS *));
 142 #define tc_frob_label(sym) m68k_frob_label (sym)
 143
 144 extern void m68k_flush_pending_output PARAMS ((void));
 145 #define md_flush_pending_output() m68k_flush_pending_output ()
 146
 147 extern void m68k_frob_symbol PARAMS ((symbolS *));
 148
 149 #ifdef BFD_ASSEMBLER
 150
 151 #define tc_frob_symbol(sym,punt)                                \
 152 do                                                              \
 153   {                                                             \
 154     if (S_GET_SEGMENT (sym) == reg_section)                     \
 155       punt = 1;                                                 \
 156     m68k_frob_symbol (sym);                                     \
 157   }                                                             \
 158 while (0)
 159
 160 #define NO_RELOC BFD_RELOC_NONE
 161 #define RELAX_RELOC_ABS8  BFD_RELOC_8
 162 #define RELAX_RELOC_ABS16 BFD_RELOC_16
 163 #define RELAX_RELOC_ABS32 BFD_RELOC_32
 164 #define RELAX_RELOC_PC8   BFD_RELOC_8_PCREL
 165 #define RELAX_RELOC_PC16  BFD_RELOC_16_PCREL
 166 #define RELAX_RELOC_PC32  BFD_RELOC_32_PCREL
 167
 168 #ifdef OBJ_ELF
 169
 170 /* This expression evaluates to false if the relocation is for a local object
 171    for which we still want to do the relocation at runtime.  True if we
 172    are willing to perform this relocation while building the .o file.  If
 173    the reloc is against an externally visible symbol, then the assembler
 174    should never do the relocation.  */
 175
 176 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)                   \
 177         ((FIX)->fx_addsy == NULL                        \
 178          || (! S_IS_EXTERNAL ((FIX)->fx_addsy)          \
 179              && ! S_IS_WEAK ((FIX)->fx_addsy)           \
 180              && S_IS_DEFINED ((FIX)->fx_addsy)          \
 181              && ! S_IS_COMMON ((FIX)->fx_addsy)))
 182
 183 #define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
 184 extern int tc_m68k_fix_adjustable PARAMS ((struct fix *));
 185
 186 #ifdef OBJ_ELF
 187 /* This arranges for gas/write.c to not apply a relocation if
 188    tc_fix_adjustable() says it is not adjustable.  */
 189 #define TC_FIX_ADJUSTABLE(fixP) tc_fix_adjustable (fixP)
 190 #endif
 191
 192 #define elf_tc_final_processing m68k_elf_final_processing
 193 extern void m68k_elf_final_processing PARAMS ((void));
 194 #endif
 195
 196 #define TC_FORCE_RELOCATION(FIX)                        \
 197         ((FIX)->fx_r_type == BFD_RELOC_VTABLE_INHERIT   \
 198          || (FIX)->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
 199
 200 #else /* ! BFD_ASSEMBLER */
 201
 202 #define tc_frob_coff_symbol(sym) m68k_frob_symbol (sym)
 203
 204 #define NO_RELOC          0
 205 #define RELAX_RELOC_ABS8  0
 206 #define RELAX_RELOC_ABS16 0
 207 #define RELAX_RELOC_ABS32 0
 208 #define RELAX_RELOC_PC8   0
 209 #define RELAX_RELOC_PC16  0
 210 #define RELAX_RELOC_PC32  0
 211
 212 #endif /* ! BFD_ASSEMBLER */
 213
 214 #define DIFF_EXPR_OK
 215
 216 extern void m68k_init_after_args PARAMS ((void));
 217 #define tc_init_after_args m68k_init_after_args
 218
 219 extern int m68k_parse_long_option PARAMS ((char *));
 220 #define md_parse_long_option m68k_parse_long_option
 221
 222 #define md_operand(x)
 223
 224 #define TARGET_WORD_SIZE 32
 225 #define TARGET_ARCH bfd_arch_m68k
 226
 227 extern struct relax_type md_relax_table[];
 228 #define TC_GENERIC_RELAX_TABLE md_relax_table
 229
 230 /* Copied from write.c */
 231 /* This was formerly called M68K_AIM_KLUDGE.  */
 232 #define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
 233   if (aim==0 && this_state== 4) { /* hard encoded from tc-m68k.c */ \
 234     aim=this_type->rlx_forward+1; /* Force relaxation into word mode */ \
 235   }