| 1 | /* tc-arc.h - Macros and type defines for the ARC. |
| 2 | Copyright (C) 2014-2016 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 | |
| 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 | /* We want local label support. */ |
| 31 | #define LOCAL_LABELS_FB 1 |
| 32 | |
| 33 | /* This macro is the BFD architecture to pass to |
| 34 | `bfd_set_arch_mach'. */ |
| 35 | #define TARGET_ARCH bfd_arch_arc |
| 36 | |
| 37 | /* The `extsym - .' expressions can be emitted using PC-relative |
| 38 | relocs. */ |
| 39 | #define DIFF_EXPR_OK |
| 40 | |
| 41 | #define REGISTER_PREFIX '%' |
| 42 | |
| 43 | #undef LITTLE_ENDIAN |
| 44 | #define LITTLE_ENDIAN 1234 |
| 45 | |
| 46 | #undef BIG_ENDIAN |
| 47 | #define BIG_ENDIAN 4321 |
| 48 | |
| 49 | #ifdef TARGET_BYTES_BIG_ENDIAN |
| 50 | |
| 51 | # define DEFAULT_TARGET_FORMAT "elf32-bigarc" |
| 52 | # define DEFAULT_BYTE_ORDER BIG_ENDIAN |
| 53 | |
| 54 | #else |
| 55 | /* You should define this macro to be non-zero if the target is big |
| 56 | endian, and zero if the target is little endian. */ |
| 57 | # define TARGET_BYTES_BIG_ENDIAN 0 |
| 58 | |
| 59 | # define DEFAULT_TARGET_FORMAT "elf32-littlearc" |
| 60 | # define DEFAULT_BYTE_ORDER LITTLE_ENDIAN |
| 61 | |
| 62 | #endif /* TARGET_BYTES_BIG_ENDIAN. */ |
| 63 | |
| 64 | /* The endianness of the target format may change based on command |
| 65 | line arguments. */ |
| 66 | extern const char *arc_target_format; |
| 67 | |
| 68 | /* This macro is the BFD target name to use when creating the output |
| 69 | file. This will normally depend upon the `OBJ_FMT' macro. */ |
| 70 | #define TARGET_FORMAT arc_target_format |
| 71 | |
| 72 | /* `md_short_jump_size' |
| 73 | `md_long_jump_size' |
| 74 | `md_create_short_jump' |
| 75 | `md_create_long_jump' |
| 76 | |
| 77 | If `WORKING_DOT_WORD' is defined, GAS will not do broken word |
| 78 | processing (*note Broken words::.). Otherwise, you should set |
| 79 | `md_short_jump_size' to the size of a short jump (a jump that is |
| 80 | just long enough to jump around a long jmp) and `md_long_jump_size' |
| 81 | to the size of a long jump (a jump that can go anywhere in the |
| 82 | function). You should define `md_create_short_jump' to create a |
| 83 | short jump around a long jump, and define `md_create_long_jump' to |
| 84 | create a long jump. */ |
| 85 | #define WORKING_DOT_WORD |
| 86 | |
| 87 | #define LISTING_HEADER "ARC GAS " |
| 88 | |
| 89 | /* The number of bytes to put into a word in a listing. This affects |
| 90 | the way the bytes are clumped together in the listing. For |
| 91 | example, a value of 2 might print `1234 5678' where a value of 1 |
| 92 | would print `12 34 56 78'. The default value is 4. */ |
| 93 | #define LISTING_WORD_SIZE 2 |
| 94 | |
| 95 | /* If you define this macro, it should return the position from which |
| 96 | the PC relative adjustment for a PC relative fixup should be made. |
| 97 | On many processors, the base of a PC relative instruction is the |
| 98 | next instruction, so this macro would return the length of an |
| 99 | instruction, plus the address of the PC relative fixup. The latter |
| 100 | can be calculated as fixp->fx_where + |
| 101 | fixp->fx_frag->fr_address. */ |
| 102 | extern long md_pcrel_from_section (struct fix *, segT); |
| 103 | #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section (FIX, SEC) |
| 104 | |
| 105 | /* [ ] is index operator. */ |
| 106 | #define NEED_INDEX_OPERATOR |
| 107 | |
| 108 | #define MAX_MEM_FOR_RS_ALIGN_CODE (1+2) |
| 109 | |
| 110 | /* HANDLE_ALIGN called after all the assembly has been done, |
| 111 | so we can fill in all the rs_align_code type frags with |
| 112 | nop instructions. */ |
| 113 | #define HANDLE_ALIGN(FRAGP) arc_handle_align (FRAGP) |
| 114 | |
| 115 | /* Values passed to md_apply_fix3 don't include the symbol value. */ |
| 116 | #define MD_APPLY_SYM_VALUE(FIX) 0 |
| 117 | |
| 118 | /* No shared lib support, so we don't need to ensure externally |
| 119 | visible symbols can be overridden. */ |
| 120 | #define EXTERN_FORCE_RELOC 0 |
| 121 | |
| 122 | /* You may define this macro to generate a fixup for a data allocation |
| 123 | pseudo-op. */ |
| 124 | #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC) \ |
| 125 | arc_cons_fix_new ((FRAG), (OFF), (LEN), (EXP), (RELOC)) |
| 126 | |
| 127 | /* We don't want gas to fixup the following program memory related |
| 128 | relocations. Check also that fx_addsy is not NULL, in order to |
| 129 | make sure that the fixup refers to some sort of label. */ |
| 130 | #define TC_VALIDATE_FIX(FIXP,SEG,SKIP) \ |
| 131 | if ((FIXP->fx_r_type == BFD_RELOC_ARC_GOTPC32 \ |
| 132 | || FIXP->fx_r_type == BFD_RELOC_ARC_PLT32 \ |
| 133 | || FIXP->fx_r_type == BFD_RELOC_ARC_S25W_PCREL_PLT \ |
| 134 | || FIXP->fx_r_type == BFD_RELOC_ARC_S25H_PCREL_PLT \ |
| 135 | || FIXP->fx_r_type == BFD_RELOC_ARC_S21W_PCREL_PLT \ |
| 136 | || FIXP->fx_r_type == BFD_RELOC_ARC_S21H_PCREL_PLT) \ |
| 137 | && FIXP->fx_addsy != NULL \ |
| 138 | && FIXP->fx_subsy == NULL) \ |
| 139 | { \ |
| 140 | symbol_mark_used_in_reloc (FIXP->fx_addsy); \ |
| 141 | goto SKIP; \ |
| 142 | } |
| 143 | |
| 144 | /* BFD_RELOC_ARC_TLS_GD_LD may use fx_subsy to store a label that is |
| 145 | later turned into fx_offset. */ |
| 146 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \ |
| 147 | ((FIX)->fx_r_type == BFD_RELOC_ARC_TLS_GD_LD) |
| 148 | |
| 149 | #define TC_VALIDATE_FIX_SUB(FIX, SEG) \ |
| 150 | ((md_register_arithmetic || (SEG) != reg_section) \ |
| 151 | && ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \ |
| 152 | || (FIX)->fx_r_type == BFD_RELOC_GPREL16 \ |
| 153 | || (FIX)->fx_r_type == BFD_RELOC_ARC_TLS_DTPOFF \ |
| 154 | || (FIX)->fx_r_type == BFD_RELOC_ARC_TLS_DTPOFF_S9 \ |
| 155 | || TC_FORCE_RELOCATION_SUB_LOCAL (FIX, SEG))) |
| 156 | |
| 157 | /* We use this to mark the end-loop label. We use this mark for ZOL |
| 158 | validity checks. */ |
| 159 | #define TC_SYMFIELD_TYPE unsigned int |
| 160 | #define ARC_GET_FLAG(s) (*symbol_get_tc (s)) |
| 161 | #define ARC_SET_FLAG(s,v) (*symbol_get_tc (s) |= (v)) |
| 162 | |
| 163 | /* The symbol is a ZOL's end loop label. */ |
| 164 | #define ARC_FLAG_ZOL (1 << 0) |
| 165 | |
| 166 | /* We use this hook to check the validity of the last to instructions |
| 167 | of a ZOL. */ |
| 168 | #define tc_frob_label(S) arc_frob_label (S) |
| 169 | |
| 170 | #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" |
| 171 | #define DYNAMIC_STRUCT_NAME "_DYNAMIC" |
| 172 | |
| 173 | /* We need to take care of not having section relative fixups for the |
| 174 | fixups with respect to Position Independent Code. */ |
| 175 | #define tc_fix_adjustable(FIX) tc_arc_fix_adjustable(FIX) |
| 176 | |
| 177 | /* This hook is required to parse register names as operands. */ |
| 178 | #define md_parse_name(name, exp, m, c) arc_parse_name (name, exp) |
| 179 | |
| 180 | /* Used within frags to pass some information to some relaxation |
| 181 | machine dependent values. */ |
| 182 | #define TC_FRAG_TYPE struct arc_relax_type |
| 183 | |
| 184 | /* Adjust non PC-rel values at relaxation time. */ |
| 185 | #define TC_PCREL_ADJUST(F) arc_pcrel_adjust (F) |
| 186 | |
| 187 | extern int arc_pcrel_adjust (fragS *); |
| 188 | extern bfd_boolean arc_parse_name (const char *, struct expressionS *); |
| 189 | extern int tc_arc_fix_adjustable (struct fix *); |
| 190 | extern void arc_handle_align (fragS *); |
| 191 | extern void arc_cons_fix_new (fragS *, int, int, expressionS *, |
| 192 | bfd_reloc_code_real_type); |
| 193 | extern void arc_frob_label (symbolS *); |
| 194 | extern void tc_arc_frame_initial_instructions (void); |
| 195 | extern int tc_arc_regname_to_dw2regnum (char *regname); |
| 196 | |
| 197 | /* The blink register is r31. */ |
| 198 | #define DWARF2_DEFAULT_RETURN_COLUMN 31 |
| 199 | /* Registers are generally saved at negative offsets to the CFA. */ |
| 200 | #define DWARF2_CIE_DATA_ALIGNMENT (-4) |
| 201 | |
| 202 | /* We want .cfi_* pseudo-ops for generating unwind info. */ |
| 203 | #define TARGET_USE_CFIPOP 1 |
| 204 | |
| 205 | /* CFI hooks. */ |
| 206 | #define tc_cfi_frame_initial_instructions tc_arc_frame_initial_instructions |
| 207 | #define tc_regname_to_dw2regnum tc_arc_regname_to_dw2regnum |
| 208 | |
| 209 | /* Define the NOPs. */ |
| 210 | #define NOP_OPCODE_S 0x000078E0 |
| 211 | #define NOP_OPCODE_L 0x264A7000 /* mov 0,0. */ |
| 212 | |
| 213 | #define MAX_FLAG_NAME_LENGTH 3 |
| 214 | |
| 215 | struct arc_flags |
| 216 | { |
| 217 | /* Name of the parsed flag. */ |
| 218 | char name[MAX_FLAG_NAME_LENGTH + 1]; |
| 219 | |
| 220 | /* The code of the parsed flag. Valid when is not zero. */ |
| 221 | unsigned char code; |
| 222 | }; |
| 223 | |
| 224 | #ifndef MAX_INSN_ARGS |
| 225 | #define MAX_INSN_ARGS 6 |
| 226 | #endif |
| 227 | |
| 228 | #ifndef MAX_INSN_FLGS |
| 229 | #define MAX_INSN_FLGS 3 |
| 230 | #endif |
| 231 | |
| 232 | extern const relax_typeS md_relax_table[]; |
| 233 | #define TC_GENERIC_RELAX_TABLE md_relax_table |
| 234 | |
| 235 | /* Used to construct instructions at md_convert_frag stage of |
| 236 | relaxation. */ |
| 237 | struct arc_relax_type |
| 238 | { |
| 239 | /* Dictates whether the pc-relativity should be kept in mind when |
| 240 | relax_frag is called or whether the pc-relativity should be |
| 241 | solved outside of relaxation. For clarification: BL(_S) and |
| 242 | B(_S) use pcrel == 1 and ADD with a solvable expression as 3rd |
| 243 | operand use pcrel == 0. */ |
| 244 | unsigned char pcrel; |
| 245 | |
| 246 | /* Expressions that dictate the operands. Used for re-assembling in |
| 247 | md_convert_frag. */ |
| 248 | expressionS tok[MAX_INSN_ARGS]; |
| 249 | |
| 250 | /* Number of tok (i.e. number of operands). Used for re-assembling |
| 251 | in md_convert_frag. */ |
| 252 | int ntok; |
| 253 | |
| 254 | /* Flags of instruction. Used for re-assembling in |
| 255 | md_convert_frag. */ |
| 256 | struct arc_flags pflags[MAX_INSN_FLGS]; |
| 257 | |
| 258 | /* Number of flags. Used for re-assembling in md_convert_frag. */ |
| 259 | int nflg; |
| 260 | }; |