1/* This file is tc-m68k.h 2 Copyright (C) 1987-2020 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#define TARGET_FORMAT "elf32-m68k" 28#define TARGET_ARCH bfd_arch_m68k 29 30#define tc_comment_chars m68k_comment_chars 31extern const char *m68k_comment_chars; 32 33#define LISTING_WORD_SIZE 2 /* A word is 2 bytes */ 34#define LISTING_LHS_WIDTH 2 /* One word on the first line */ 35#define LISTING_LHS_WIDTH_SECOND 2 /* One word on the second line */ 36#define LISTING_LHS_CONT_LINES 4/* And 4 lines max */ 37#define LISTING_HEADER "68K GAS " 38 39#ifndef REGISTER_PREFIX 40#define REGISTER_PREFIX '%' 41#endif 42 43#ifndef REGISTER_PREFIX_OPTIONAL 44#define REGISTER_PREFIX_OPTIONAL 0 45#endif 46 47extern void m68k_mri_mode_change (int); 48#define MRI_MODE_CHANGE(i) m68k_mri_mode_change (i) 49 50extern int m68k_conditional_pseudoop (const pseudo_typeS *); 51#define tc_conditional_pseudoop(pop) m68k_conditional_pseudoop (pop) 52 53extern void m68k_frob_label (symbolS *); 54#define tc_frob_label(sym) m68k_frob_label (sym) 55 56extern void m68k_flush_pending_output (void); 57#define md_flush_pending_output() m68k_flush_pending_output () 58 59extern void m68k_frob_symbol (symbolS *); 60 61#define tc_frob_symbol(sym,punt) \ 62do \ 63 { \ 64 if (S_GET_SEGMENT (sym) == reg_section) \ 65 punt = 1; \ 66 m68k_frob_symbol (sym); \ 67 } \ 68while (0) 69 70#define NO_RELOC BFD_RELOC_NONE 71#define RELAX_RELOC_ABS8 BFD_RELOC_8 72#define RELAX_RELOC_ABS16 BFD_RELOC_16 73#define RELAX_RELOC_ABS32 BFD_RELOC_32 74#define RELAX_RELOC_PC8 BFD_RELOC_8_PCREL 75#define RELAX_RELOC_PC16 BFD_RELOC_16_PCREL 76#define RELAX_RELOC_PC32 BFD_RELOC_32_PCREL 77 78#define tc_fix_adjustable(X) tc_m68k_fix_adjustable(X) 79extern int tc_m68k_fix_adjustable (struct fix *); 80 81/* Target *-*-elf implies an embedded target. No shared libs. 82 *-*-uclinux also requires special casing to prevent GAS from 83 generating unsupported R_68K_PC16 relocs. */ 84#define EXTERN_FORCE_RELOC \ 85 ((strcmp (TARGET_OS, "elf") != 0) && (strcmp (TARGET_OS, "uclinux") != 0)) 86 87/* Values passed to md_apply_fix don't include symbol values. */ 88#define MD_APPLY_SYM_VALUE(FIX) 0 89 90#define elf_tc_final_processing m68k_elf_final_processing 91extern void m68k_elf_final_processing (void); 92 93#define DIFF_EXPR_OK 94 95extern int m68k_parse_long_option (char *); 96#define md_parse_long_option m68k_parse_long_option 97 98#define md_operand(x) 99 100extern struct relax_type md_relax_table[]; 101#define TC_GENERIC_RELAX_TABLE md_relax_table 102 103/* We can't do a byte jump to the next instruction, so in that case 104 force word mode by faking AIM. */ 105#define md_prepare_relax_scan(fragP, address, aim, this_state, this_type) \ 106 do \ 107 { \ 108 if (aim == 0 && this_type->rlx_forward == 127) \ 109 aim = 128; \ 110 } \ 111 while (0) 112 113#define DWARF2_LINE_MIN_INSN_LENGTH 2 114 115/* We want .cfi_* pseudo-ops for generating unwind info. */ 116#define TARGET_USE_CFIPOP 1 117 118#define DWARF2_DEFAULT_RETURN_COLUMN 24 119#define DWARF2_CIE_DATA_ALIGNMENT (-4) 120 121#define tc_regname_to_dw2regnum tc_m68k_regname_to_dw2regnum 122extern int tc_m68k_regname_to_dw2regnum (const char *regname); 123 124#define tc_cfi_frame_initial_instructions tc_m68k_frame_initial_instructions 125extern void tc_m68k_frame_initial_instructions (void); 126 127#ifdef TE_UCLINUX 128/* elf2flt does not honor PT_LOAD's from the executable. 129 .text and .eh_frame sections will not end up in the same segment and so 130 we cannot use PC-relative encoding for CFI. */ 131# define CFI_DIFF_EXPR_OK 0 132 133/* However, follow compiler's guidance when it specifies encoding for LSDA. */ 134# define CFI_DIFF_LSDA_OK 1 135#endif 136 137struct broken_word; 138#define TC_CHECK_ADJUSTED_BROKEN_DOT_WORD(new_offset, brokw) \ 139 tc_m68k_check_adjusted_broken_word ((offsetT) (new_offset), (brokw)) 140extern void tc_m68k_check_adjusted_broken_word (offsetT, 141 struct broken_word *); 142