gas/config/tc-m68k.h

   1 /* This file is tc-m68k.h
   2    Copyright (C) 1987, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20    02111-1307, USA.  */
  21
  22 #define TC_M68K 1
  23
  24 #ifdef ANSI_PROTOTYPES
  25 struct fix;
  26 #endif
  27
  28 #define TARGET_BYTES_BIG_ENDIAN 1
  29
  30 #ifdef OBJ_AOUT
  31 #ifdef TE_SUN3
  32 #define TARGET_FORMAT "a.out-sunos-big"
  33 #endif
  34 #ifdef TE_NetBSD
  35 #define TARGET_FORMAT "a.out-m68k-netbsd"
  36 #endif
  37 #ifdef TE_LINUX
  38 #define TARGET_FORMAT "a.out-m68k-linux"
  39 #endif
  40 #ifndef TARGET_FORMAT
  41 #define TARGET_FORMAT "a.out-zero-big"
  42 #endif
  43 #endif
  44
  45 #ifdef OBJ_ELF
  46 #define TARGET_FORMAT "elf32-m68k"
  47 #endif
  48
  49 #ifdef TE_APOLLO
  50 #define COFF_MAGIC              APOLLOM68KMAGIC
  51 #define COFF_AOUTHDR_MAGIC      APOLLO_COFF_VERSION_NUMBER
  52 #undef OBJ_COFF_OMIT_OPTIONAL_HEADER
  53 #endif
  54
  55 #ifdef TE_LYNX
  56 #define TARGET_FORMAT           "coff-m68k-lynx"
  57 #endif
  58 #ifdef TE_AUX
  59 #define TARGET_FORMAT           "coff-m68k-aux"
  60 #endif
  61 #ifdef TE_DELTA
  62 #define TARGET_FORMAT           "coff-m68k-sysv"
  63 #endif
  64
  65 #ifndef COFF_MAGIC
  66 #define COFF_MAGIC MC68MAGIC
  67 #endif
  68 #define BFD_ARCH bfd_arch_m68k /* for non-BFD_ASSEMBLER */
  69 #define TARGET_ARCH bfd_arch_m68k /* BFD_ASSEMBLER */
  70 #define COFF_FLAGS F_AR32W
  71 #define TC_COUNT_RELOC(x) ((x)->fx_addsy||(x)->fx_subsy)
  72
  73 #define TC_COFF_FIX2RTYPE(fixP) tc_coff_fix2rtype(fixP)
  74 #define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag)
  75 extern int tc_coff_sizemachdep PARAMS ((struct frag *));
  76 #ifdef TE_SUN3
  77 /* This variable contains the value to write out at the beginning of
  78    the a.out file.  The 2<<16 means that this is a 68020 file instead
  79    of an old-style 68000 file */
  80
  81 #define DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE (2<<16|OMAGIC);    /* Magic byte for file header */
  82 #endif /* TE_SUN3 */
  83
  84 #ifndef AOUT_MACHTYPE
  85 #define AOUT_MACHTYPE m68k_aout_machtype
  86 extern int m68k_aout_machtype;
  87 #endif
  88
  89 #define tc_comment_chars m68k_comment_chars
  90 extern const char *m68k_comment_chars;
  91
  92 #define tc_crawl_symbol_chain(a)        {;}     /* not used */
  93 #define tc_headers_hook(a)              {;}     /* not used */
  94 #define tc_aout_pre_write_hook(x)       {;}     /* not used */
  95
  96 #define LISTING_WORD_SIZE 2     /* A word is 2 bytes */
  97 #define LISTING_LHS_WIDTH 2     /* One word on the first line */
  98 #define LISTING_LHS_WIDTH_SECOND 2      /* One word on the second line */
  99 #define LISTING_LHS_CONT_LINES 4/* And 4 lines max */
 100 #define LISTING_HEADER "68K GAS "
 101
 102 #ifndef REGISTER_PREFIX
 103 #define REGISTER_PREFIX '%'
 104 #endif
 105
 106 #if !defined (REGISTER_PREFIX_OPTIONAL)
 107 #if defined (M68KCOFF) || defined (OBJ_ELF)
 108 #ifndef BFD_ASSEMBLER
 109 #define LOCAL_LABEL(name) (name[0] == '.' \
 110                            && (name[1] == 'L' || name[1] == '.'))
 111 #endif /* ! BFD_ASSEMBLER */
 112 #define REGISTER_PREFIX_OPTIONAL 0
 113 #else /* ! (COFF || ELF) */
 114 #define REGISTER_PREFIX_OPTIONAL 1
 115 #endif /* ! (COFF || ELF) */
 116 #endif /* not def REGISTER_PREFIX and not def OPTIONAL_REGISTER_PREFIX */
 117
 118 #ifdef TE_DELTA
 119 /* On the Delta, `%' can occur within a label name, but not as the
 120    initial character.  */
 121 #define LEX_PCT LEX_NAME
 122 /* On the Delta, `~' can start a label name, but is converted to '.'.  */
 123 #define LEX_TILDE LEX_BEGIN_NAME
 124 #define tc_canonicalize_symbol_name(s) ((*(s) == '~' ? *(s) = '.' : '.'), s)
 125 /* On the Delta, dots are not required before pseudo-ops.  */
 126 #define NO_PSEUDO_DOT 1
 127 #ifndef BFD_ASSEMBLER
 128 #undef LOCAL_LABEL
 129 #define LOCAL_LABEL(name) \
 130   (name[0] == '.' || (name[0] == 'L' && name[1] == '%'))
 131 #endif
 132 #endif
 133
 134 extern void m68k_mri_mode_change PARAMS ((int));
 135 #define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)
 136
 137 extern int m68k_conditional_pseudoop PARAMS ((pseudo_typeS *));
 138 #define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)
 139
 140 extern void m68k_frob_label PARAMS ((symbolS *));
 141 #define tc_frob_label(sym) m68k_frob_label (sym)
 142
 143 extern void m68k_flush_pending_output PARAMS ((void));
 144 #define md_flush_pending_output() m68k_flush_pending_output ()
 145
 146 extern void m68k_frob_symbol PARAMS ((symbolS *));
 147
 148 #ifdef BFD_ASSEMBLER
 149
 150 #define tc_frob_symbol(sym,punt)                                \
 151 do                                                              \
 152   {                                                             \
 153     if (S_GET_SEGMENT (sym) == reg_section)                     \
 154       punt = 1;                                                 \
 155     m68k_frob_symbol (sym);                                     \
 156   }                                                             \
 157 while (0)
 158
 159 #define NO_RELOC BFD_RELOC_NONE
 160 #define RELAX_RELOC_ABS8  BFD_RELOC_8
 161 #define RELAX_RELOC_ABS16 BFD_RELOC_16
 162 #define RELAX_RELOC_ABS32 BFD_RELOC_32
 163 #define RELAX_RELOC_PC8   BFD_RELOC_8_PCREL
 164 #define RELAX_RELOC_PC16  BFD_RELOC_16_PCREL
 165 #define RELAX_RELOC_PC32  BFD_RELOC_32_PCREL
 166
 167 #ifdef OBJ_ELF
 168
 169 /* This expression evaluates to false if the relocation is for a local object
 170    for which we still want to do the relocation at runtime.  True if we
 171    are willing to perform this relocation while building the .o file.  If
 172    the reloc is against an externally visible symbol, then the assembler
 173    should never do the relocation.  */
 174
 175 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX)                   \
 176         ((FIX)->fx_addsy == NULL                        \
 177          || (! S_IS_EXTERNAL ((FIX)->fx_addsy)          \
 178              && ! S_IS_WEAK ((FIX)->fx_addsy)           \
 179              && S_IS_DEFINED ((FIX)->fx_addsy)          \
 180              && ! S_IS_COMMON ((FIX)->fx_addsy)))
 181
 182 #define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
 183 extern int tc_m68k_fix_adjustable PARAMS ((struct fix *));
 184
 185 #ifdef OBJ_ELF
 186 /* This arranges for gas/write.c to not apply a relocation if
 187    tc_fix_adjustable() says it is not adjustable.  */
 188 #define TC_FIX_ADJUSTABLE(fixP) tc_fix_adjustable (fixP)
 189 #endif
 190
 191 #define elf_tc_final_processing m68k_elf_final_processing
 192 extern void m68k_elf_final_processing PARAMS ((void));
 193 #endif
 194
 195 #define TC_FORCE_RELOCATION(FIX)                        \
 196         ((FIX)->fx_r_type == BFD_RELOC_VTABLE_INHERIT   \
 197          || (FIX)->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
 198
 199 #else /* ! BFD_ASSEMBLER */
 200
 201 #define tc_frob_coff_symbol(sym) m68k_frob_symbol (sym)
 202
 203 #define NO_RELOC          0
 204 #define RELAX_RELOC_ABS8  0
 205 #define RELAX_RELOC_ABS16 0
 206 #define RELAX_RELOC_ABS32 0
 207 #define RELAX_RELOC_PC8   0
 208 #define RELAX_RELOC_PC16  0
 209 #define RELAX_RELOC_PC32  0
 210
 211 #endif /* ! BFD_ASSEMBLER */
 212
 213 #define DIFF_EXPR_OK
 214
 215 extern void m68k_init_after_args PARAMS ((void));
 216 #define tc_init_after_args m68k_init_after_args
 217
 218 extern int m68k_parse_long_option PARAMS ((char *));
 219 #define md_parse_long_option m68k_parse_long_option
 220
 221 #define md_operand(x)
 222
 223 #define TARGET_WORD_SIZE 32
 224 #define TARGET_ARCH bfd_arch_m68k
 225
 226 extern struct relax_type md_relax_table[];
 227 #define TC_GENERIC_RELAX_TABLE md_relax_table
 228
 229 /* Copied from write.c */
 230 /* This was formerly called M68K_AIM_KLUDGE.  */
 231 #define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
 232   if (aim==0 && this_state== 4) { /* hard encoded from tc-m68k.c */ \
 233     aim=this_type->rlx_forward+1; /* Force relaxation into word mode */ \
 234   }