gas/config/tc-aarch64.h

   1 /* tc-aarch64.h -- Header file for tc-aarch64.c.
   2    Copyright (C) 2009-2014 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(C,S,STR)           ((C) == ':' \
  95                                            || ((C) == '/' && 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 DWARF2_LINE_MIN_INSN_LENGTH     4
 150
 151 /* The lr register is r30.  */
 152 #define DWARF2_DEFAULT_RETURN_COLUMN  30
 153
 154 /* Registers are generally saved at negative offsets to the CFA.  */
 155 #define DWARF2_CIE_DATA_ALIGNMENT     (-8)
 156
 157 extern int aarch64_dwarf2_addr_size (void);
 158 #define DWARF2_ADDR_SIZE(bfd) aarch64_dwarf2_addr_size ()
 159
 160 #ifdef OBJ_ELF
 161 # define obj_frob_symbol(sym, punt)     aarch64elf_frob_symbol ((sym), & (punt))
 162
 163 # define GLOBAL_OFFSET_TABLE_NAME       "_GLOBAL_OFFSET_TABLE_"
 164 # define TC_SEGMENT_INFO_TYPE           struct aarch64_segment_info_type
 165
 166 /* This is not really an alignment operation, but it's something we
 167    need to do at the same time: whenever we are figuring out the
 168    alignment for data, we should check whether a $d symbol is
 169    necessary.  */
 170 # define md_cons_align(nbytes)          mapping_state (MAP_DATA)
 171
 172 enum mstate
 173 {
 174   MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections.  */
 175   MAP_DATA,
 176   MAP_INSN,
 177 };
 178
 179 void mapping_state (enum mstate);
 180
 181 struct aarch64_segment_info_type
 182 {
 183   enum mstate mapstate;
 184   unsigned int marked_pr_dependency;
 185 };
 186
 187 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 188 #define TARGET_USE_CFIPOP              1
 189
 190 /* CFI hooks.  */
 191 #define tc_regname_to_dw2regnum            tc_aarch64_regname_to_dw2regnum
 192 #define tc_cfi_frame_initial_instructions  tc_aarch64_frame_initial_instructions
 193
 194 #else /* Not OBJ_ELF.  */
 195 #define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
 196 #endif
 197
 198 #if defined OBJ_ELF || defined OBJ_COFF
 199
 200 # define EXTERN_FORCE_RELOC                     1
 201 # define tc_fix_adjustable(FIX)                 1
 202 /* Values passed to md_apply_fix don't include the symbol value.  */
 203 # define MD_APPLY_SYM_VALUE(FIX)                0
 204
 205 #endif
 206
 207 #define MD_PCREL_FROM_SECTION(F,S) md_pcrel_from_section(F,S)
 208
 209 extern long md_pcrel_from_section (struct fix *, segT);
 210 extern void aarch64_frag_align_code (int, int);
 211 extern const char * elf64_aarch64_target_format (void);
 212 extern int aarch64_force_relocation (struct fix *);
 213 extern void aarch64_cleanup (void);
 214 extern void aarch64_start_line_hook (void);
 215 extern void aarch64_frob_label (symbolS *);
 216 extern int aarch64_data_in_code (void);
 217 extern char * aarch64_canonicalize_symbol_name (char *);
 218 extern void aarch64_adjust_symtab (void);
 219 extern void aarch64elf_frob_symbol (symbolS *, int *);
 220 extern void cons_fix_new_aarch64 (fragS *, int, int, expressionS *);
 221 extern void aarch64_init_frag (struct frag *, int);
 222 extern void aarch64_handle_align (struct frag *);
 223 extern int tc_aarch64_regname_to_dw2regnum (char *regname);
 224 extern void tc_aarch64_frame_initial_instructions (void);
 225
 226 #ifdef TE_PE
 227
 228 #define O_secrel O_md1
 229
 230 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
 231 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
 232
 233 #endif /* TE_PE */
 234
 235 #endif /* TC_AARCH64 */