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 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, 59 Temple Place - Suite 330, Boston, MA 21 02111-1307, USA. */ 22 23#define TC_M68K 1 24 25#ifdef ANSI_PROTOTYPES 26struct 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#if defined(TE_NetBSD) || defined(TE_OpenBSD) 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) 76extern 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 87extern int m68k_aout_machtype; 88#endif 89 90#define tc_comment_chars m68k_comment_chars 91extern 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 135extern void m68k_mri_mode_change PARAMS ((int)); 136#define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i) 137 138extern int m68k_conditional_pseudoop PARAMS ((pseudo_typeS *)); 139#define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop) 140 141extern void m68k_frob_label PARAMS ((symbolS *)); 142#define tc_frob_label(sym) m68k_frob_label (sym) 143 144extern void m68k_flush_pending_output PARAMS ((void)); 145#define md_flush_pending_output() m68k_flush_pending_output () 146 147extern void m68k_frob_symbol PARAMS ((symbolS *)); 148 149#ifdef BFD_ASSEMBLER 150 151#define tc_frob_symbol(sym,punt) \ 152do \ 153 { \ 154 if (S_GET_SEGMENT (sym) == reg_section) \ 155 punt = 1; \ 156 m68k_frob_symbol (sym); \ 157 } \ 158while (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) 170extern 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 182extern 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 201extern void m68k_init_after_args PARAMS ((void)); 202#define tc_init_after_args m68k_init_after_args 203 204extern 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_WORD_SIZE 32 210#define TARGET_ARCH bfd_arch_m68k 211 212extern struct relax_type md_relax_table[]; 213#define TC_GENERIC_RELAX_TABLE md_relax_table 214 215/* We can't do a byte jump to the next instruction, so in that case 216 force word mode by faking AIM. */ 217#define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \ 218 do \ 219 { \ 220 if (aim == 0 && this_type->rlx_forward == 127) \ 221 aim = 128; \ 222 } \ 223 while (0) 224 225#define DWARF2_LINE_MIN_INSN_LENGTH 2 226 227/* We want .cfi_* pseudo-ops for generating unwind info. */ 228#define TARGET_USE_CFIPOP 1 229 230#define DWARF2_DEFAULT_RETURN_COLUMN 24 231#define DWARF2_CIE_DATA_ALIGNMENT (-4) 232 233#define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum 234extern int tc_m68k_regname_to_dw2regnum (const char *regname); 235 236#define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions 237extern void tc_m68k_frame_initial_instructions (void); 238