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 #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(FIX) tc_coff_fix2rtype(FIX)
  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 #define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
 170 extern int tc_m68k_fix_adjustable PARAMS ((struct fix *));
 171
 172 /* Target *-*-elf implies an embedded target.  No shared libs.
 173    *-*-uclinux also requires special casing to prevent GAS from
 174    generating unsupported R_68K_PC16 relocs.  */
 175 #define EXTERN_FORCE_RELOC \
 176   ((strcmp (TARGET_OS, "elf") != 0) && (strcmp (TARGET_OS, "uclinux") != 0))
 177
 178 /* Values passed to md_apply_fix3 don't include symbol values.  */
 179 #define MD_APPLY_SYM_VALUE(FIX) 0
 180
 181 #define elf_tc_final_processing m68k_elf_final_processing
 182 extern void m68k_elf_final_processing PARAMS ((void));
 183 #endif
 184
 185 #else /* ! BFD_ASSEMBLER */
 186
 187 #define tc_frob_coff_symbol(sym) m68k_frob_symbol (sym)
 188
 189 #define NO_RELOC          0
 190 #define RELAX_RELOC_ABS8  0
 191 #define RELAX_RELOC_ABS16 0
 192 #define RELAX_RELOC_ABS32 0
 193 #define RELAX_RELOC_PC8   0
 194 #define RELAX_RELOC_PC16  0
 195 #define RELAX_RELOC_PC32  0
 196
 197 #endif /* ! BFD_ASSEMBLER */
 198
 199 #define DIFF_EXPR_OK
 200
 201 extern void m68k_init_after_args PARAMS ((void));
 202 #define tc_init_after_args m68k_init_after_args
 203
 204 extern int m68k_parse_long_option PARAMS ((char *));
 205 #define md_parse_long_option m68k_parse_long_option
 206
 207 #define md_operand(x)
 208
 209 #define TARGET_ARCH bfd_arch_m68k
 210
 211 extern struct relax_type md_relax_table[];
 212 #define TC_GENERIC_RELAX_TABLE md_relax_table
 213
 214 /* We can't do a byte jump to the next instruction, so in that case
 215    force word mode by faking AIM.  */
 216 #define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
 217   do                                                                      \
 218     {                                                                     \
 219       if (aim == 0 && this_type->rlx_forward == 127)                      \
 220         aim = 128;                                                        \
 221     }                                                                     \
 222   while (0)
 223
 224 #define DWARF2_LINE_MIN_INSN_LENGTH 2
 225
 226 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 227 #define TARGET_USE_CFIPOP 1
 228
 229 #define DWARF2_DEFAULT_RETURN_COLUMN 24
 230 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
 231
 232 #define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum
 233 extern int tc_m68k_regname_to_dw2regnum (const char *regname);
 234
 235 #define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions
 236 extern void tc_m68k_frame_initial_instructions (void);