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, 2006, 2007
   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 #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_AUX
  55 #define TARGET_FORMAT           "coff-m68k-aux"
  56 #endif
  57 #ifdef TE_DELTA
  58 #define TARGET_FORMAT           "coff-m68k-sysv"
  59 #endif
  60
  61 #ifndef COFF_MAGIC
  62 #define COFF_MAGIC MC68MAGIC
  63 #endif
  64 #define TARGET_ARCH bfd_arch_m68k
  65
  66 #define tc_comment_chars m68k_comment_chars
  67 extern const char *m68k_comment_chars;
  68
  69 #define LISTING_WORD_SIZE 2     /* A word is 2 bytes */
  70 #define LISTING_LHS_WIDTH 2     /* One word on the first line */
  71 #define LISTING_LHS_WIDTH_SECOND 2      /* One word on the second line */
  72 #define LISTING_LHS_CONT_LINES 4/* And 4 lines max */
  73 #define LISTING_HEADER "68K GAS "
  74
  75 #ifndef REGISTER_PREFIX
  76 #define REGISTER_PREFIX '%'
  77 #endif
  78
  79 #if !defined (REGISTER_PREFIX_OPTIONAL)
  80 #if defined (M68KCOFF) || defined (OBJ_ELF)
  81 #define REGISTER_PREFIX_OPTIONAL 0
  82 #else /* ! (COFF || ELF) */
  83 #define REGISTER_PREFIX_OPTIONAL 1
  84 #endif /* ! (COFF || ELF) */
  85 #endif /* not def REGISTER_PREFIX and not def OPTIONAL_REGISTER_PREFIX */
  86
  87 #ifdef TE_DELTA
  88 /* On the Delta, `%' can occur within a label name, but not as the
  89    initial character.  */
  90 #define LEX_PCT LEX_NAME
  91 /* On the Delta, `~' can start a label name, but is converted to '.'.  */
  92 #define LEX_TILDE LEX_BEGIN_NAME
  93 #define tc_canonicalize_symbol_name(s) ((*(s) == '~' ? *(s) = '.' : '.'), s)
  94 /* On the Delta, dots are not required before pseudo-ops.  */
  95 #define NO_PSEUDO_DOT 1
  96 #endif
  97
  98 extern void m68k_mri_mode_change (int);
  99 #define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)
 100
 101 extern int m68k_conditional_pseudoop (pseudo_typeS *);
 102 #define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)
 103
 104 extern void m68k_frob_label (symbolS *);
 105 #define tc_frob_label(sym) m68k_frob_label (sym)
 106
 107 extern void m68k_flush_pending_output (void);
 108 #define md_flush_pending_output() m68k_flush_pending_output ()
 109
 110 extern void m68k_frob_symbol (symbolS *);
 111
 112 #define tc_frob_symbol(sym,punt)                                \
 113 do                                                              \
 114   {                                                             \
 115     if (S_GET_SEGMENT (sym) == reg_section)                     \
 116       punt = 1;                                                 \
 117     m68k_frob_symbol (sym);                                     \
 118   }                                                             \
 119 while (0)
 120
 121 #define NO_RELOC BFD_RELOC_NONE
 122 #define RELAX_RELOC_ABS8  BFD_RELOC_8
 123 #define RELAX_RELOC_ABS16 BFD_RELOC_16
 124 #define RELAX_RELOC_ABS32 BFD_RELOC_32
 125 #define RELAX_RELOC_PC8   BFD_RELOC_8_PCREL
 126 #define RELAX_RELOC_PC16  BFD_RELOC_16_PCREL
 127 #define RELAX_RELOC_PC32  BFD_RELOC_32_PCREL
 128
 129 #ifdef OBJ_ELF
 130 #define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
 131 extern int tc_m68k_fix_adjustable (struct fix *);
 132
 133 /* Target *-*-elf implies an embedded target.  No shared libs.
 134    *-*-uclinux also requires special casing to prevent GAS from
 135    generating unsupported R_68K_PC16 relocs.  */
 136 #define EXTERN_FORCE_RELOC \
 137   ((strcmp (TARGET_OS, "elf") != 0) && (strcmp (TARGET_OS, "uclinux") != 0))
 138
 139 /* Values passed to md_apply_fix don't include symbol values.  */
 140 #define MD_APPLY_SYM_VALUE(FIX) 0
 141
 142 #define elf_tc_final_processing m68k_elf_final_processing
 143 extern void m68k_elf_final_processing (void);
 144 #endif
 145
 146 #define DIFF_EXPR_OK
 147
 148 extern int m68k_parse_long_option (char *);
 149 #define md_parse_long_option m68k_parse_long_option
 150
 151 #define md_operand(x)
 152
 153 #define TARGET_ARCH bfd_arch_m68k
 154
 155 extern struct relax_type md_relax_table[];
 156 #define TC_GENERIC_RELAX_TABLE md_relax_table
 157
 158 /* We can't do a byte jump to the next instruction, so in that case
 159    force word mode by faking AIM.  */
 160 #define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
 161   do                                                                      \
 162     {                                                                     \
 163       if (aim == 0 && this_type->rlx_forward == 127)                      \
 164         aim = 128;                                                        \
 165     }                                                                     \
 166   while (0)
 167
 168 #define DWARF2_LINE_MIN_INSN_LENGTH 2
 169
 170 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 171 #define TARGET_USE_CFIPOP 1
 172
 173 #define DWARF2_DEFAULT_RETURN_COLUMN 24
 174 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
 175
 176 #define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum
 177 extern int tc_m68k_regname_to_dw2regnum (char *regname);
 178
 179 #define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions
 180 extern void tc_m68k_frame_initial_instructions (void);
 181
 182 #ifdef TE_UCLINUX
 183 /* elf2flt does not honor PT_LOAD's from the executable.
 184    .text and .eh_frame sections will not end up in the same segment and so
 185    we cannot use PC-relative encoding for CFI.  */
 186 # define CFI_DIFF_EXPR_OK 0
 187
 188 /* However, follow compiler's guidance when it specifies encoding for LSDA.  */
 189 # define CFI_DIFF_LSDA_OK 1
 190 #endif