gas/config/tc-m68k.h

   1 /* This file is tc-m68k.h
   2    Copyright (C) 1987-2024 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 #ifndef TC_M68K_H
  22 #define TC_M68K_H
  23
  24 #define TC_M68K 1
  25
  26 struct fix;
  27
  28 #define TARGET_BYTES_BIG_ENDIAN 1
  29
  30 #define TARGET_FORMAT "elf32-m68k"
  31 #define TARGET_ARCH bfd_arch_m68k
  32
  33 #define tc_comment_chars m68k_comment_chars
  34 extern const char *m68k_comment_chars;
  35
  36 #define LISTING_WORD_SIZE 2     /* A word is 2 bytes */
  37 #define LISTING_LHS_WIDTH 2     /* One word on the first line */
  38 #define LISTING_LHS_WIDTH_SECOND 2      /* One word on the second line */
  39 #define LISTING_LHS_CONT_LINES 4/* And 4 lines max */
  40 #define LISTING_HEADER "68K GAS "
  41
  42 #ifndef REGISTER_PREFIX
  43 #define REGISTER_PREFIX '%'
  44 #endif
  45
  46 #ifndef REGISTER_PREFIX_OPTIONAL
  47 #define REGISTER_PREFIX_OPTIONAL 0
  48 #endif
  49
  50 extern void m68k_mri_mode_change (int);
  51 #define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i)
  52
  53 extern int m68k_conditional_pseudoop (const pseudo_typeS *);
  54 #define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop)
  55
  56 extern void m68k_frob_label (symbolS *);
  57 #define tc_frob_label(sym) m68k_frob_label (sym)
  58
  59 extern void m68k_flush_pending_output (void);
  60 #define md_flush_pending_output() m68k_flush_pending_output ()
  61
  62 extern void m68k_frob_symbol (symbolS *);
  63
  64 #define tc_frob_symbol(sym,punt)                                \
  65 do                                                              \
  66   {                                                             \
  67     if (S_GET_SEGMENT (sym) == reg_section)                     \
  68       punt = 1;                                                 \
  69     m68k_frob_symbol (sym);                                     \
  70   }                                                             \
  71 while (0)
  72
  73 #define NO_RELOC BFD_RELOC_NONE
  74 #define RELAX_RELOC_ABS8  BFD_RELOC_8
  75 #define RELAX_RELOC_ABS16 BFD_RELOC_16
  76 #define RELAX_RELOC_ABS32 BFD_RELOC_32
  77 #define RELAX_RELOC_PC8   BFD_RELOC_8_PCREL
  78 #define RELAX_RELOC_PC16  BFD_RELOC_16_PCREL
  79 #define RELAX_RELOC_PC32  BFD_RELOC_32_PCREL
  80
  81 #define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X)
  82 extern int tc_m68k_fix_adjustable (struct fix *);
  83
  84 /* Target *-*-elf implies an embedded target.  No shared libs.
  85    *-*-uclinux also requires special casing to prevent GAS from
  86    generating unsupported R_68K_PC16 relocs.  */
  87 #define EXTERN_FORCE_RELOC \
  88   ((strcmp (TARGET_OS, "elf") != 0) && (strcmp (TARGET_OS, "uclinux") != 0))
  89
  90 /* Values passed to md_apply_fix don't include symbol values.  */
  91 #define MD_APPLY_SYM_VALUE(FIX) 0
  92
  93 #define elf_tc_final_processing m68k_elf_final_processing
  94 extern void m68k_elf_final_processing (void);
  95
  96 #define DIFF_EXPR_OK
  97
  98 extern int m68k_parse_long_option (char *);
  99 #define md_parse_long_option m68k_parse_long_option
 100
 101 #define md_operand(x)
 102
 103 extern struct relax_type md_relax_table[];
 104 #define TC_GENERIC_RELAX_TABLE md_relax_table
 105
 106 /* We can't do a byte jump to the next instruction, so in that case
 107    force word mode by faking AIM.  */
 108 #define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \
 109   do                                                                      \
 110     {                                                                     \
 111       if (aim == 0 && this_type->rlx_forward == 127)                      \
 112         aim = 128;                                                        \
 113     }                                                                     \
 114   while (0)
 115
 116 #define DWARF2_LINE_MIN_INSN_LENGTH 2
 117
 118 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 119 #define TARGET_USE_CFIPOP 1
 120
 121 #define DWARF2_DEFAULT_RETURN_COLUMN 24
 122 #define DWARF2_CIE_DATA_ALIGNMENT (-4)
 123
 124 #define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum
 125 extern int tc_m68k_regname_to_dw2regnum (const char *regname);
 126
 127 #define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions
 128 extern void tc_m68k_frame_initial_instructions (void);
 129
 130 #ifdef TE_UCLINUX
 131 /* elf2flt does not honor PT_LOAD's from the executable.
 132    .text and .eh_frame sections will not end up in the same segment and so
 133    we cannot use PC-relative encoding for CFI.  */
 134 # define CFI_DIFF_EXPR_OK 0
 135
 136 /* However, follow compiler's guidance when it specifies encoding for LSDA.  */
 137 # define CFI_DIFF_LSDA_OK 1
 138 #endif
 139
 140 struct broken_word;
 141 #define TC_CHECK_ADJUSTED_BROKEN_DOT_WORD(new_offset, brokw) \
 142   tc_m68k_check_adjusted_broken_word ((offsetT) (new_offset), (brokw))
 143 extern void tc_m68k_check_adjusted_broken_word (offsetT,
 144                                                 struct broken_word *);
 145
 146 /* We want to warn if any text labels are misaligned.  In order to get
 147    the right line number, we need to record the line number for each
 148    label.  */
 149 struct m68k_tc_sy
 150 {
 151   const char *file;
 152   unsigned int line;
 153   int text;
 154 };
 155
 156 #define TC_SYMFIELD_TYPE struct m68k_tc_sy
 157
 158 #endif /* TC_M68K_H */