gas/config/tc-aarch64.h

   1 /* tc-aarch64.h -- Header file for tc-aarch64.c.
   2    Copyright (C) 2009-2018 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_frob_section(S) aarch64_frob_section (S)
  82
  83 #define TC_FIX_TYPE struct aarch64_fix
  84 #define TC_INIT_FIX_DATA(FIX) { (FIX)->tc_fix_data.inst = NULL; \
  85     (FIX)->tc_fix_data.opnd = AARCH64_OPND_NIL; }
  86
  87 #define TC_SYMFIELD_TYPE        unsigned int
  88 #define AARCH64_GET_FLAG(s)     (*symbol_get_tc (s))
  89
  90 void aarch64_copy_symbol_attributes (symbolS *, symbolS *);
  91 #ifndef TC_COPY_SYMBOL_ATTRIBUTES
  92 #define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
  93   (aarch64_copy_symbol_attributes (DEST, SRC))
  94 #endif
  95
  96 #define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR)                        \
  97   (NEXT_CHAR == ':' || (NEXT_CHAR == '/' && aarch64_data_in_code ()))
  98 #define tc_canonicalize_symbol_name(str) aarch64_canonicalize_symbol_name (str);
  99 #define obj_adjust_symtab()              aarch64_adjust_symtab ()
 100
 101 #define LISTING_HEADER "AARCH64 GAS "
 102
 103 #define LOCAL_LABEL(name)  (name[0] == '.' && name[1] == 'L')
 104 #define LOCAL_LABELS_FB    1
 105
 106 /* This expression evaluates to true if the relocation is for a local
 107    object for which we still want to do the relocation at runtime.
 108    False if we are willing to perform this relocation while building
 109    the .o file.  GOTOFF does not need to be checked here because it is
 110    not pcrel.  I am not sure if some of the others are ever used with
 111    pcrel, but it is easier to be safe than sorry.  */
 112
 113 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 114   (GENERIC_FORCE_RELOCATION_LOCAL (FIX)                 \
 115    || (FIX)->fx_r_type == BFD_RELOC_64                  \
 116    || (FIX)->fx_r_type == BFD_RELOC_32)
 117
 118 #define TC_CONS_FIX_NEW(f,w,s,e,r) cons_fix_new_aarch64 ((f), (w), (s), (e))
 119
 120 /* Max space for a rs_align_code fragment is 3 unaligned bytes
 121    (fr_fix) plus 4 bytes to contain the repeating NOP (fr_var).  */
 122 #define MAX_MEM_FOR_RS_ALIGN_CODE 7
 123
 124 /* For frags in code sections we need to record whether they contain
 125    code or data.  */
 126 struct aarch64_frag_type
 127 {
 128   int recorded;
 129 #ifdef OBJ_ELF
 130   /* If there is a mapping symbol at offset 0 in this frag,
 131      it will be saved in FIRST_MAP.  If there are any mapping
 132      symbols in this frag, the last one will be saved in
 133      LAST_MAP.  */
 134   symbolS *first_map, *last_map;
 135 #endif
 136 };
 137
 138 #define TC_FRAG_TYPE            struct aarch64_frag_type
 139 /* NOTE: max_chars is a local variable from frag_var / frag_variant.  */
 140 #define TC_FRAG_INIT(fragp)     aarch64_init_frag (fragp, max_chars)
 141 #define HANDLE_ALIGN(fragp)     aarch64_handle_align (fragp)
 142
 143 #define md_do_align(N, FILL, LEN, MAX, LABEL)                                   \
 144   if (FILL == NULL && (N) != 0 && ! need_pass_2 && subseg_text_p (now_seg))     \
 145     {                                                                           \
 146       frag_align_code (N, MAX);                                                 \
 147       goto LABEL;                                                               \
 148     }
 149
 150 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
 151
 152 #define DWARF2_LINE_MIN_INSN_LENGTH     4
 153
 154 /* The lr register is r30.  */
 155 #define DWARF2_DEFAULT_RETURN_COLUMN  30
 156
 157 /* Registers are generally saved at negative offsets to the CFA.  */
 158 #define DWARF2_CIE_DATA_ALIGNMENT     (-8)
 159
 160 extern int aarch64_dwarf2_addr_size (void);
 161 #define DWARF2_ADDR_SIZE(bfd) aarch64_dwarf2_addr_size ()
 162
 163 #ifdef OBJ_ELF
 164 # define obj_frob_symbol(sym, punt)     aarch64elf_frob_symbol ((sym), & (punt))
 165
 166 # define GLOBAL_OFFSET_TABLE_NAME       "_GLOBAL_OFFSET_TABLE_"
 167 # define TC_SEGMENT_INFO_TYPE           struct aarch64_segment_info_type
 168
 169 /* This is not really an alignment operation, but it's something we
 170    need to do at the same time: whenever we are figuring out the
 171    alignment for data, we should check whether a $d symbol is
 172    necessary.  */
 173 # define md_cons_align(nbytes)          mapping_state (MAP_DATA)
 174
 175 enum mstate
 176 {
 177   MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections.  */
 178   MAP_DATA,
 179   MAP_INSN,
 180 };
 181
 182 void mapping_state (enum mstate);
 183
 184 struct aarch64_segment_info_type
 185 {
 186   enum mstate mapstate;
 187   unsigned int marked_pr_dependency;
 188   aarch64_instr_sequence insn_sequence;
 189 };
 190
 191 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 192 #define TARGET_USE_CFIPOP              1
 193
 194 /* CFI hooks.  */
 195 #define tc_regname_to_dw2regnum            tc_aarch64_regname_to_dw2regnum
 196 #define tc_cfi_frame_initial_instructions  tc_aarch64_frame_initial_instructions
 197
 198 extern void aarch64_after_parse_args (void);
 199 #define md_after_parse_args() aarch64_after_parse_args ()
 200
 201 #else /* Not OBJ_ELF.  */
 202 #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
 203 #endif
 204
 205 #if defined OBJ_ELF || defined OBJ_COFF
 206
 207 # define EXTERN_FORCE_RELOC                     1
 208 # define tc_fix_adjustable(FIX)                 1
 209 /* Values passed to md_apply_fix don't include the symbol value.  */
 210 # define MD_APPLY_SYM_VALUE(FIX)                0
 211
 212 #endif
 213
 214 #define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)
 215
 216 extern long md_pcrel_from_section (struct fix *, segT);
 217 extern void aarch64_frag_align_code (int, int);
 218 extern const char * elf64_aarch64_target_format (void);
 219 extern int aarch64_force_relocation (struct fix *);
 220 extern void aarch64_cleanup (void);
 221 extern void aarch64_start_line_hook (void);
 222 extern void aarch64_frob_label (symbolS *);
 223 extern void aarch64_frob_section (asection *sec);
 224 extern int aarch64_data_in_code (void);
 225 extern char * aarch64_canonicalize_symbol_name (char *);
 226 extern void aarch64_adjust_symtab (void);
 227 extern void aarch64elf_frob_symbol (symbolS *, int *);
 228 extern void cons_fix_new_aarch64 (fragS *, int, int, expressionS *);
 229 extern void aarch64_init_frag (struct frag *, int);
 230 extern void aarch64_handle_align (struct frag *);
 231 extern int tc_aarch64_regname_to_dw2regnum (char *regname);
 232 extern void tc_aarch64_frame_initial_instructions (void);
 233
 234 #ifdef TE_PE
 235
 236 #define O_secrel O_md1
 237
 238 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 239 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 240
 241 #endif /* TE_PE */
 242
 243 #endif /* TC_AARCH64 */