1 /* tc-aarch64.h -- Header file for tc-aarch64.c. 2 Copyright (C) 2009-2016 Free Software Foundation, Inc. 3 Contributed by ARM Ltd. 4 5 This file is part of GAS. 6 7 GAS is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the license, or 10 (at your option) any later version. 11 12 GAS is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; see the file COPYING3. If not, 19 see <http://www.gnu.org/licenses/>. */ 20 21 #ifndef TC_AARCH64 22 #define TC_AARCH64 1 23 24 #include "opcode/aarch64.h" 25 26 #ifndef TARGET_BYTES_BIG_ENDIAN 27 #define TARGET_BYTES_BIG_ENDIAN 0 28 #endif 29 30 #define WORKING_DOT_WORD 31 32 #define TARGET_ARCH bfd_arch_aarch64 33 34 #define DIFF_EXPR_OK 35 36 /* Permit // comments. */ 37 #define DOUBLESLASH_LINE_COMMENTS 38 39 #ifdef LITTLE_ENDIAN 40 #undef LITTLE_ENDIAN 41 #endif 42 43 #ifdef BIG_ENDIAN 44 #undef BIG_ENDIAN 45 #endif 46 47 #define LITTLE_ENDIAN 1234 48 #define BIG_ENDIAN 4321 49 50 #define SWAP_32(n) \ 51 ((((n) & 0xff) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) \ 52 | (((n) >> 24) & 0xff)) 53 54 struct fix; 55 56 struct aarch64_fix 57 { 58 struct aarch64_inst *inst; 59 enum aarch64_opnd opnd; 60 }; 61 62 #if defined OBJ_ELF 63 # define AARCH64_BI_ENDIAN 64 # define TARGET_FORMAT elf64_aarch64_target_format () 65 #endif 66 67 #define TC_FORCE_RELOCATION(FIX) aarch64_force_relocation (FIX) 68 69 /* Currently there is no machine specific frags generated. */ 70 #define md_convert_frag(b,s,f) as_fatal ("aarch64 convert_frag called\n") 71 72 #define md_cleanup() aarch64_cleanup () 73 74 #define md_start_line_hook() aarch64_start_line_hook () 75 76 #define tc_frob_label(S) aarch64_frob_label (S) 77 78 /* We also need to mark assembler created symbols: */ 79 #define tc_frob_fake_label(S) aarch64_frob_label (S) 80 81 #define TC_FIX_TYPE struct aarch64_fix 82 #define TC_INIT_FIX_DATA(FIX) { (FIX)->tc_fix_data.inst = NULL; \ 83 (FIX)->tc_fix_data.opnd = AARCH64_OPND_NIL; } 84 85 #define TC_SYMFIELD_TYPE unsigned int 86 #define AARCH64_GET_FLAG(s) (*symbol_get_tc (s)) 87 88 void aarch64_copy_symbol_attributes (symbolS *, symbolS *); 89 #ifndef TC_COPY_SYMBOL_ATTRIBUTES 90 #define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \ 91 (aarch64_copy_symbol_attributes (DEST, SRC)) 92 #endif 93 94 #define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) \ 95 (NEXT_CHAR == ':' || (NEXT_CHAR == '/' && aarch64_data_in_code ())) 96 #define tc_canonicalize_symbol_name(str) aarch64_canonicalize_symbol_name (str); 97 #define obj_adjust_symtab() aarch64_adjust_symtab () 98 99 #define LISTING_HEADER "AARCH64 GAS " 100 101 #define LOCAL_LABEL(name) (name[0] == '.' && name[1] == 'L') 102 #define LOCAL_LABELS_FB 1 103 104 /* This expression evaluates to true if the relocation is for a local 105 object for which we still want to do the relocation at runtime. 106 False if we are willing to perform this relocation while building 107 the .o file. GOTOFF does not need to be checked here because it is 108 not pcrel. I am not sure if some of the others are ever used with 109 pcrel, but it is easier to be safe than sorry. */ 110 111 #define TC_FORCE_RELOCATION_LOCAL(FIX) \ 112 (!(FIX)->fx_pcrel \ 113 || (FIX)->fx_r_type == BFD_RELOC_64 \ 114 || (FIX)->fx_r_type == BFD_RELOC_32 \ 115 || TC_FORCE_RELOCATION (FIX)) 116 117 #define TC_CONS_FIX_NEW(f,w,s,e,r) cons_fix_new_aarch64 ((f), (w), (s), (e)) 118 119 /* Max space for a rs_align_code fragment is 3 unaligned bytes 120 (fr_fix) plus 4 bytes to contain the repeating NOP (fr_var). */ 121 #define MAX_MEM_FOR_RS_ALIGN_CODE 7 122 123 /* For frags in code sections we need to record whether they contain 124 code or data. */ 125 struct aarch64_frag_type 126 { 127 int recorded; 128 #ifdef OBJ_ELF 129 /* If there is a mapping symbol at offset 0 in this frag, 130 it will be saved in FIRST_MAP. If there are any mapping 131 symbols in this frag, the last one will be saved in 132 LAST_MAP. */ 133 symbolS *first_map, *last_map; 134 #endif 135 }; 136 137 #define TC_FRAG_TYPE struct aarch64_frag_type 138 /* NOTE: max_chars is a local variable from frag_var / frag_variant. */ 139 #define TC_FRAG_INIT(fragp) aarch64_init_frag (fragp, max_chars) 140 #define HANDLE_ALIGN(fragp) aarch64_handle_align (fragp) 141 142 #define md_do_align(N, FILL, LEN, MAX, LABEL) \ 143 if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg)) \ 144 { \ 145 frag_align_code (N, MAX); \ 146 goto LABEL; \ 147 } 148 149 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 150 151 #define DWARF2_LINE_MIN_INSN_LENGTH 4 152 153 /* The lr register is r30. */ 154 #define DWARF2_DEFAULT_RETURN_COLUMN 30 155 156 /* Registers are generally saved at negative offsets to the CFA. */ 157 #define DWARF2_CIE_DATA_ALIGNMENT (-8) 158 159 extern int aarch64_dwarf2_addr_size (void); 160 #define DWARF2_ADDR_SIZE(bfd) aarch64_dwarf2_addr_size () 161 162 #ifdef OBJ_ELF 163 # define obj_frob_symbol(sym, punt) aarch64elf_frob_symbol ((sym), & (punt)) 164 165 # define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" 166 # define TC_SEGMENT_INFO_TYPE struct aarch64_segment_info_type 167 168 /* This is not really an alignment operation, but it's something we 169 need to do at the same time: whenever we are figuring out the 170 alignment for data, we should check whether a $d symbol is 171 necessary. */ 172 # define md_cons_align(nbytes) mapping_state (MAP_DATA) 173 174 enum mstate 175 { 176 MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */ 177 MAP_DATA, 178 MAP_INSN, 179 }; 180 181 void mapping_state (enum mstate); 182 183 struct aarch64_segment_info_type 184 { 185 enum mstate mapstate; 186 unsigned int marked_pr_dependency; 187 }; 188 189 /* We want .cfi_* pseudo-ops for generating unwind info. */ 190 #define TARGET_USE_CFIPOP 1 191 192 /* CFI hooks. */ 193 #define tc_regname_to_dw2regnum tc_aarch64_regname_to_dw2regnum 194 #define tc_cfi_frame_initial_instructions tc_aarch64_frame_initial_instructions 195 196 #else /* Not OBJ_ELF. */ 197 #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_" 198 #endif 199 200 #if defined OBJ_ELF || defined OBJ_COFF 201 202 # define EXTERN_FORCE_RELOC 1 203 # define tc_fix_adjustable(FIX) 1 204 /* Values passed to md_apply_fix don't include the symbol value. */ 205 # define MD_APPLY_SYM_VALUE(FIX) 0 206 207 #endif 208 209 #define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S) 210 211 extern long md_pcrel_from_section (struct fix *, segT); 212 extern void aarch64_frag_align_code (int, int); 213 extern const char * elf64_aarch64_target_format (void); 214 extern int aarch64_force_relocation (struct fix *); 215 extern void aarch64_cleanup (void); 216 extern void aarch64_start_line_hook (void); 217 extern void aarch64_frob_label (symbolS *); 218 extern int aarch64_data_in_code (void); 219 extern char * aarch64_canonicalize_symbol_name (char *); 220 extern void aarch64_adjust_symtab (void); 221 extern void aarch64elf_frob_symbol (symbolS *, int *); 222 extern void cons_fix_new_aarch64 (fragS *, int, int, expressionS *); 223 extern void aarch64_init_frag (struct frag *, int); 224 extern void aarch64_handle_align (struct frag *); 225 extern int tc_aarch64_regname_to_dw2regnum (char *regname); 226 extern void tc_aarch64_frame_initial_instructions (void); 227 228 #ifdef TE_PE 229 230 #define O_secrel O_md1 231 232 #define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset 233 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int); 234 235 #endif /* TE_PE */ 236 237 #endif /* TC_AARCH64 */ 238