1/* This file is tc-m68k.h 2 Copyright (C) 1987-2017 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 23struct 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 65extern 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 96extern void m68k_mri_mode_change (int); 97#define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i) 98 99extern int m68k_conditional_pseudoop (pseudo_typeS *); 100#define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop) 101 102extern void m68k_frob_label (symbolS *); 103#define tc_frob_label(sym) m68k_frob_label (sym) 104 105extern void m68k_flush_pending_output (void); 106#define md_flush_pending_output() m68k_flush_pending_output () 107 108extern void m68k_frob_symbol (symbolS *); 109 110#define tc_frob_symbol(sym,punt) \ 111do \ 112 { \ 113 if (S_GET_SEGMENT (sym) == reg_section) \ 114 punt = 1; \ 115 m68k_frob_symbol (sym); \ 116 } \ 117while (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) 129extern 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 141extern void m68k_elf_final_processing (void); 142#endif 143 144#define DIFF_EXPR_OK 145 146extern 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 153extern 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 175extern int tc_m68k_regname_to_dw2regnum (const char *regname); 176 177#define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions 178extern 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 190struct broken_word; 191#define TC_CHECK_ADJUSTED_BROKEN_DOT_WORD(new_offset, brokw) \ 192 tc_m68k_check_adjusted_broken_word ((offsetT) (new_offset), (brokw)) 193extern void tc_m68k_check_adjusted_broken_word (offsetT, 194 struct broken_word *); 195