gas/config/tc-arc.h

   1 /* tc-arc.h - Macros and type defines for the ARC.
   2    Copyright (C) 2014-2020 Free Software Foundation, Inc.
   3
   4    Contributed by Claudiu Zissulescu (claziss@synopsys.com)
   5
   6    This file is part of GAS, the GNU Assembler.
   7
   8    GAS is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as
  10    published by the Free Software Foundation; either version 3,
  11    or (at your option) any later version.
  12
  13    GAS is distributed in the hope that it will be useful, but
  14    WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  16    the GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GAS; see the file COPYING.  If not, write to the Free
  20    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 #ifndef TC_ARC
  24 /* By convention, you should define this macro in the `.h' file.  For
  25    example, `tc-m68k.h' defines `TC_M68K'.  You might have to use this
  26    if it is necessary to add CPU specific code to the object format
  27    file.  */
  28 #define TC_ARC
  29
  30 #include "opcode/arc.h"
  31
  32 /* We want local label support.  */
  33 #define LOCAL_LABELS_FB 1
  34
  35 /* This macro is the BFD architecture to pass to
  36    `bfd_set_arch_mach'.  */
  37 #define TARGET_ARCH bfd_arch_arc
  38
  39 /* The `extsym - .' expressions can be emitted using PC-relative
  40    relocs.  */
  41 #define DIFF_EXPR_OK
  42
  43 #define REGISTER_PREFIX '%'
  44
  45 #undef  LITTLE_ENDIAN
  46 #define LITTLE_ENDIAN   1234
  47
  48 #undef  BIG_ENDIAN
  49 #define BIG_ENDIAN      4321
  50
  51 #ifdef TARGET_BYTES_BIG_ENDIAN
  52
  53 # define DEFAULT_TARGET_FORMAT  "elf32-bigarc"
  54 # define DEFAULT_BYTE_ORDER     BIG_ENDIAN
  55
  56 #else
  57 /* You should define this macro to be non-zero if the target is big
  58    endian, and zero if the target is little endian.  */
  59 # define TARGET_BYTES_BIG_ENDIAN 0
  60
  61 # define DEFAULT_TARGET_FORMAT  "elf32-littlearc"
  62 # define DEFAULT_BYTE_ORDER     LITTLE_ENDIAN
  63
  64 #endif /* TARGET_BYTES_BIG_ENDIAN.  */
  65
  66 /* The endianness of the target format may change based on command
  67    line arguments.  */
  68 extern const char *arc_target_format;
  69
  70 /* This macro is the BFD target name to use when creating the output
  71    file.  This will normally depend upon the `OBJ_FMT' macro.  */
  72 #define TARGET_FORMAT arc_target_format
  73
  74 /* `md_short_jump_size'
  75    `md_long_jump_size'
  76    `md_create_short_jump'
  77    `md_create_long_jump'
  78
  79    If `WORKING_DOT_WORD' is defined, GAS will not do broken word
  80    processing (*note Broken words::.).  Otherwise, you should set
  81    `md_short_jump_size' to the size of a short jump (a jump that is
  82    just long enough to jump around a long jmp) and `md_long_jump_size'
  83    to the size of a long jump (a jump that can go anywhere in the
  84    function).  You should define `md_create_short_jump' to create a
  85    short jump around a long jump, and define `md_create_long_jump' to
  86    create a long jump.  */
  87 #define WORKING_DOT_WORD
  88
  89 #define LISTING_HEADER "ARC GAS "
  90
  91 /* The number of bytes to put into a word in a listing.  This affects
  92    the way the bytes are clumped together in the listing.  For
  93    example, a value of 2 might print `1234 5678' where a value of 1
  94    would print `12 34 56 78'.  The default value is 4.  */
  95 #define LISTING_WORD_SIZE 2
  96
  97 /* If you define this macro, it should return the position from which
  98    the PC relative adjustment for a PC relative fixup should be made.
  99    On many processors, the base of a PC relative instruction is the
 100    next instruction, so this macro would return the length of an
 101    instruction, plus the address of the PC relative fixup.  The latter
 102    can be calculated as fixp->fx_where +
 103    fixp->fx_frag->fr_address.  */
 104 extern long md_pcrel_from_section (struct fix *, segT);
 105 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC)
 106
 107 /* [ ] is index operator.  */
 108 #define NEED_INDEX_OPERATOR
 109
 110 #define MAX_MEM_FOR_RS_ALIGN_CODE (1+2)
 111
 112 /* HANDLE_ALIGN called after all the assembly has been done,
 113    so we can fill in all the rs_align_code type frags with
 114    nop instructions.  */
 115 #define HANDLE_ALIGN(FRAGP)      arc_handle_align (FRAGP)
 116
 117 /* Values passed to md_apply_fix3 don't include the symbol value.  */
 118 #define MD_APPLY_SYM_VALUE(FIX) 0
 119
 120 /* No shared lib support, so we don't need to ensure externally
 121    visible symbols can be overridden.  */
 122 #define EXTERN_FORCE_RELOC 0
 123
 124 /* You may define this macro to generate a fixup for a data allocation
 125    pseudo-op.  */
 126 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC)     \
 127   arc_cons_fix_new ((FRAG), (OFF), (LEN), (EXP), (RELOC))
 128
 129 /* We don't want gas to fixup the following program memory related
 130    relocations.  Check also that fx_addsy is not NULL, in order to
 131    make sure that the fixup refers to some sort of label.  */
 132 #define TC_VALIDATE_FIX(FIXP,SEG,SKIP)                               \
 133   if ((FIXP->fx_r_type == BFD_RELOC_ARC_GOTPC32                      \
 134        || FIXP->fx_r_type == BFD_RELOC_ARC_PLT32                     \
 135        || FIXP->fx_r_type == BFD_RELOC_ARC_S25W_PCREL_PLT            \
 136        || FIXP->fx_r_type == BFD_RELOC_ARC_S25H_PCREL_PLT            \
 137        || FIXP->fx_r_type == BFD_RELOC_ARC_S21W_PCREL_PLT            \
 138        || FIXP->fx_r_type == BFD_RELOC_ARC_S21H_PCREL_PLT)           \
 139       && FIXP->fx_addsy != NULL                                      \
 140       && FIXP->fx_subsy == NULL)                                     \
 141     {                                                                \
 142       symbol_mark_used_in_reloc (FIXP->fx_addsy);                    \
 143       goto SKIP;                                                     \
 144     }
 145
 146 /* BFD_RELOC_ARC_TLS_GD_LD may use fx_subsy to store a label that is
 147    later turned into fx_offset.  */
 148 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
 149   ((FIX)->fx_r_type == BFD_RELOC_ARC_TLS_GD_LD)
 150
 151 #define TC_VALIDATE_FIX_SUB(FIX, SEG) \
 152   ((md_register_arithmetic || (SEG) != reg_section) \
 153    && ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \
 154        || (FIX)->fx_r_type == BFD_RELOC_GPREL16 \
 155        || (FIX)->fx_r_type == BFD_RELOC_ARC_TLS_DTPOFF \
 156        || (FIX)->fx_r_type == BFD_RELOC_ARC_TLS_DTPOFF_S9 \
 157        || TC_FORCE_RELOCATION_SUB_LOCAL (FIX, SEG)))
 158
 159 /* We use this to mark the end-loop label.  We use this mark for ZOL
 160    validity checks.  */
 161 #define TC_SYMFIELD_TYPE   unsigned int
 162 #define ARC_GET_FLAG(s)   (*symbol_get_tc (s))
 163 #define ARC_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v))
 164
 165 /* The symbol is a ZOL's end loop label.  */
 166 #define ARC_FLAG_ZOL      (1 << 0)
 167 /* The symbol is an AUX register.  */
 168 #define ARC_FLAG_AUX      (1 << 1)
 169
 170 /* We use this hook to check the validity of the last to instructions
 171    of a ZOL.  */
 172 #define tc_frob_label(S)  arc_frob_label (S)
 173
 174 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
 175
 176 /* We need to take care of not having section relative fixups for the
 177    fixups with respect to Position Independent Code.  */
 178 #define tc_fix_adjustable(FIX)  tc_arc_fix_adjustable(FIX)
 179
 180 /* This hook is required to parse register names as operands.  */
 181 #define md_parse_name(name, exp, m, c) arc_parse_name (name, exp)
 182
 183 /* Used within frags to pass some information to some relaxation
 184    machine dependent values.  */
 185 #define TC_FRAG_TYPE struct arc_relax_type
 186
 187 /* Adjust non PC-rel values at relaxation time.  */
 188 #define TC_PCREL_ADJUST(F) arc_pcrel_adjust (F)
 189
 190 /* Adjust symbol table.  */
 191 #define obj_adjust_symtab() arc_adjust_symtab ()
 192
 193 /* Object attribute hooks.  */
 194 #define md_end arc_md_end
 195 #define CONVERT_SYMBOLIC_ATTRIBUTE(name) arc_convert_symbolic_attribute (name)
 196 #ifndef TC_COPY_SYMBOL_ATTRIBUTES
 197 #define TC_COPY_SYMBOL_ATTRIBUTES(DEST, SRC) \
 198   (arc_copy_symbol_attributes (DEST, SRC))
 199 #endif
 200
 201 extern void arc_copy_symbol_attributes (symbolS *, symbolS *);
 202 extern int arc_convert_symbolic_attribute (const char *);
 203 extern void arc_md_end (void);
 204 extern void arc_adjust_symtab (void);
 205 extern int arc_pcrel_adjust (fragS *);
 206 extern bfd_boolean arc_parse_name (const char *, struct expressionS *);
 207 extern int tc_arc_fix_adjustable (struct fix *);
 208 extern void arc_handle_align (fragS *);
 209 extern void arc_cons_fix_new (fragS *, int, int, expressionS *,
 210                               bfd_reloc_code_real_type);
 211 extern void arc_frob_label (symbolS *);
 212 extern void tc_arc_frame_initial_instructions (void);
 213 extern int tc_arc_regname_to_dw2regnum (char *regname);
 214
 215 /* The blink register is r31.  */
 216 #define DWARF2_DEFAULT_RETURN_COLUMN    31
 217 /* Registers are generally saved at negative offsets to the CFA.  */
 218 #define DWARF2_CIE_DATA_ALIGNMENT       (-4)
 219
 220 /* We want .cfi_* pseudo-ops for generating unwind info.  */
 221 #define TARGET_USE_CFIPOP 1
 222
 223 /* CFI hooks.  */
 224 #define tc_cfi_frame_initial_instructions  tc_arc_frame_initial_instructions
 225 #define tc_regname_to_dw2regnum tc_arc_regname_to_dw2regnum
 226
 227 /* Define the NOPs.  */
 228 #define NOP_OPCODE_S   0x000078E0
 229 #define NOP_OPCODE_L   0x264A7000 /* mov 0,0.  */
 230
 231 #define MAX_FLAG_NAME_LENGTH 7
 232
 233 struct arc_flags
 234 {
 235   /* Name of the parsed flag.  */
 236   char name[MAX_FLAG_NAME_LENGTH + 1];
 237
 238   /* Pointer to arc flags.  */
 239   const struct arc_flag_operand *flgp;
 240 };
 241
 242 extern const relax_typeS md_relax_table[];
 243 #define TC_GENERIC_RELAX_TABLE md_relax_table
 244
 245 /* Used to construct instructions at md_convert_frag stage of
 246    relaxation.  */
 247 struct arc_relax_type
 248 {
 249   /* Dictates whether the pc-relativity should be kept in mind when
 250      relax_frag is called or whether the pc-relativity should be
 251      solved outside of relaxation.  For clarification: BL(_S) and
 252      B(_S) use pcrel == 1 and ADD with a solvable expression as 3rd
 253      operand use pcrel == 0.  */
 254   unsigned char pcrel;
 255
 256   /* Expressions that dictate the operands.  Used for re-assembling in
 257      md_convert_frag.  */
 258   expressionS tok[MAX_INSN_ARGS];
 259
 260   /* Number of tok (i.e. number of operands).  Used for re-assembling
 261      in md_convert_frag.  */
 262   int ntok;
 263
 264   /* Flags of instruction.  Used for re-assembling in
 265      md_convert_frag.  */
 266   struct arc_flags pflags[MAX_INSN_FLGS];
 267
 268   /* Number of flags.  Used for re-assembling in md_convert_frag.  */
 269   int nflg;
 270 };
 271
 272 #endif