gas/config/tc-m68k.h

   1 /* This file is tc-m68k.h
   2    Copyright (C) 1987-2015 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    GAS is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  19    02110-1301, USA.  */
  20
  21 #define TC_M68K 1
  22
  23 struct fix;
  24
  25 #define TARGET_BYTES_BIG_ENDIAN 1
  26
  27 #ifdef OBJ_AOUT
  28 #ifdef TE_SUN3
  29 #define TARGET_FORMAT "a.out-sunos-big"
  30 #endif
  31 #ifdef TE_NetBSD
  32 #define TARGET_FORMAT "a.out-m68k-netbsd"
  33 #endif
  34 #ifdef TE_LINUX
  35 #define TARGET_FORMAT "a.out-m68k-linux"
  36 #endif
  37 #ifndef TARGET_FORMAT
  38 #define TARGET_FORMAT "a.out-zero-big"
  39 #endif
  40 #endif
  41
  42 #ifdef OBJ_ELF
  43 #define TARGET_FORMAT "elf32-m68k"
  44 #endif
  45
  46 #ifdef TE_APOLLO
  47 #define COFF_MAGIC              APOLLOM68KMAGIC
  48 #define COFF_AOUTHDR_MAGIC      APOLLO_COFF_VERSION_NUMBER
  49 #undef OBJ_COFF_OMIT_OPTIONAL_HEADER
  50 #endif
  51
  52 #ifdef TE_AUX
  53 #define TARGET_FORMAT           "coff-m68k-aux"
  54 #endif
  55 #ifdef TE_DELTA
  56 #define TARGET_FORMAT           "coff-m68k-sysv"
  57 #endif
  58
  59 #ifndef COFF_MAGIC
  60 #define COFF_MAGIC MC68MAGIC
  61 #endif
  62 #define TARGET_ARCH bfd_arch_m68k
  63
  64 #define tc_comment_chars m68k_comment_chars
  65 extern const char *m68k_comment_chars;
  66
  67 #define LISTING_WORD_SIZE 2     /* A word is 2 bytes */
  68 #define LISTING_LHS_WIDTH 2     /* One word on the first line */
  69 #define LISTING_LHS_WIDTH_SECOND 2      /* One word on the second line */
  70 #define LISTING_LHS_CONT_LINES 4/* And 4 lines max */
  71 #define LISTING_HEADER "68K GAS "
  72
  73 #ifndef REGISTER_PREFIX
  74 #define REGISTER_PREFIX '%'
  75 #endif
  76
  77 #if !defined (REGISTER_PREFIX_OPTIONAL)
  78 #if defined (M68KCOFF) || defined (OBJ_ELF)
  79 #define REGISTER_PREFIX_OPTIONAL 0
  80 #else /* ! (COFF || ELF) */
  81 #define REGISTER_PREFIX_OPTIONAL 1
  82 #endif /* ! (COFF || ELF) */
  83 #endif /* not def REGISTER_PREFIX and not def OPTIONAL_REGISTER_PREFIX */
  84
  85 #ifdef TE_DELTA
  86 /* On the Delta, `%' can occur within a label name, but not as the
  87    initial character.  */
  88 #define LEX_PCT LEX_NAME
  89 /* On the Delta, `~' can start a label name, but is converted to '.'.  */
  90 #define LEX_TILDE LEX_BEGIN_NAME
  91 #define tc_canonicalize_symbol_name(s) ((*(s) == '~' ? *(s) = '.' : '.'), s)
  92 /* On the Delta, dots are not required before pseudo-ops.  */
  93 #define NO_PSEUDO_DOT 1
  94 #endif
  95
  96 extern void m68k_mri_mode_change (int);
  97 #define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)
  98
  99 extern int m68k_conditional_pseudoop (pseudo_typeS *);
 100 #define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)
 101
 102 extern void m68k_frob_label (symbolS *);
 103 #define tc_frob_label(sym) m68k_frob_label (sym)
 104
 105 extern void m68k_flush_pending_output (void);
 106 #define md_flush_pending_output() m68k_flush_pending_output ()
 107
 108 extern void m68k_frob_symbol (symbolS *);
 109
 110 #define tc_frob_symbol(sym,punt)                                \
 111 do                                                              \
 112   {                                                             \
 113     if (S_GET_SEGMENT (sym) == reg_section)                     \
 114       punt = 1;                                                 \
 115     m68k_frob_symbol (sym);                                     \
 116   }                                                             \
 117 while (0)
 118
 119 #define NO_RELOC BFD_RELOC_NONE
 120 #define RELAX_RELOC_ABS8  BFD_RELOC_8
 121 #define RELAX_RELOC_ABS16 BFD_RELOC_16
 122 #define RELAX_RELOC_ABS32 BFD_RELOC_32
 123 #define RELAX_RELOC_PC8   BFD_RELOC_8_PCREL
 124 #define RELAX_RELOC_PC16  BFD_RELOC_16_PCREL
 125 #define RELAX_RELOC_PC32  BFD_RELOC_32_PCREL
 126
 127 #ifdef OBJ_ELF
 128 #define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
 129 extern int tc_m68k_fix_adjustable (struct fix *);
 130
 131 /* Target *-*-elf implies an embedded target.  No shared libs.
 132    *-*-uclinux also requires special casing to prevent GAS from
 133    generating unsupported R_68K_PC16 relocs.  */
 134 #define EXTERN_FORCE_RELOC \
 135   ((strcmp (TARGET_OS, "elf") != 0) && (strcmp (TARGET_OS, "uclinux") != 0))
 136
 137 /* Values passed to md_apply_fix don't include symbol values.  */
 138 #define MD_APPLY_SYM_VALUE(FIX) 0
 139
 140 #define elf_tc_final_processing m68k_elf_final_processing
 141 extern void m68k_elf_final_processing (void);
 142 #endif
 143
 144 #define DIFF_EXPR_OK
 145
 146 extern int m68k_parse_long_option (char *);
 147 #define md_parse_long_option m68k_parse_long_option
 148
 149 #define md_operand(x)
 150
 151 #define TARGET_ARCH bfd_arch_m68k
 152
 153 extern struct relax_type md_relax_table[];
 154 #define TC_GENERIC_RELAX_TABLE md_relax_table
 155
 156 /* We can't do a byte jump to the next instruction, so in that case
 157    force word mode by faking AIM.  */
 158 #define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
 159   do                                                                      \
 160     {                                                                     \
 161       if (aim == 0 && this_type->rlx_forward == 127)                      \
 162         aim = 128;                                                        \
 163     }                                                                     \
 164   while (0)
 165
 166 #define DWARF2_LINE_MIN_INSN_LENGTH 2
 167
 168 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 169 #define TARGET_USE_CFIPOP 1
 170
 171 #define DWARF2_DEFAULT_RETURN_COLUMN 24
 172 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
 173
 174 #define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum
 175 extern int tc_m68k_regname_to_dw2regnum (char *regname);
 176
 177 #define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions
 178 extern void tc_m68k_frame_initial_instructions (void);
 179
 180 #ifdef TE_UCLINUX
 181 /* elf2flt does not honor PT_LOAD's from the executable.
 182    .text and .eh_frame sections will not end up in the same segment and so
 183    we cannot use PC-relative encoding for CFI.  */
 184 # define CFI_DIFF_EXPR_OK 0
 185
 186 /* However, follow compiler's guidance when it specifies encoding for LSDA.  */
 187 # define CFI_DIFF_LSDA_OK 1
 188 #endif
 189
 190 struct broken_word;
 191 #define TC_CHECK_ADJUSTED_BROKEN_DOT_WORD(new_offset, brokw) \
 192   tc_m68k_check_adjusted_broken_word ((offsetT) (new_offset), (brokw))
 193 extern void tc_m68k_check_adjusted_broken_word (offsetT,
 194                                                 struct broken_word *);