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 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 (const 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