1 /* tc-nds32.h -- Header file for tc-nds32.c. 2 Copyright (C) 2012-2021 Free Software Foundation, Inc. 3 Contributed by Andes Technology Corporation. 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, or (at your option) 10 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 GAS; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 #ifndef TC_NDS32 23 #define TC_NDS32 24 25 #include <stdint.h> 26 27 /* Enum mapping symbol. */ 28 enum mstate 29 { 30 MAP_UNDEFINED = 0, /* Must be zero, for seginfo in new sections. */ 31 MAP_DATA, 32 MAP_CODE, 33 }; 34 #define TC_SEGMENT_INFO_TYPE struct nds32_segment_info_type 35 36 /* For mapping symbol. */ 37 struct nds32_segment_info_type 38 { 39 enum mstate mapstate; 40 }; 41 42 #define LISTING_HEADER \ 43 (target_big_endian ? "NDS32 GAS" : "NDS32 GAS Little Endian") 44 45 /* The target BFD architecture. */ 46 #define TARGET_ARCH bfd_arch_nds32 47 48 /* mapping to mach_table[5] */ 49 #define ISA_V1 bfd_mach_n1h 50 #define ISA_V2 bfd_mach_n1h_v2 51 #define ISA_V3 bfd_mach_n1h_v3 52 #define ISA_V3M bfd_mach_n1h_v3m 53 54 /* Default to big endian. Please note that for Andes architecture, 55 instructions are always in big-endian format. */ 56 #ifndef TARGET_BYTES_BIG_ENDIAN 57 #define TARGET_BYTES_BIG_ENDIAN 1 58 #endif 59 60 /* as.c. */ 61 /* Extend GAS command line option handling capability. */ 62 extern int nds32_parse_option (int, const char *); 63 extern void nds32_after_parse_args (void); 64 /* The endianness of the target format may change based on command 65 line arguments. */ 66 extern const char * nds32_target_format (void); 67 68 #define md_parse_option(optc, optarg) nds32_parse_option (optc, optarg) 69 #define md_after_parse_args() nds32_after_parse_args () 70 #define TARGET_FORMAT nds32_target_format() 71 72 /* expr.c */ 73 extern int nds32_parse_name (char const *, expressionS *, enum expr_mode, char *); 74 extern bool nds32_allow_local_subtract (expressionS *, expressionS *, segT); 75 #define md_parse_name(name, exprP, mode, nextcharP) \ 76 nds32_parse_name (name, exprP, mode, nextcharP) 77 #define md_allow_local_subtract(lhs,rhs,sect) nds32_allow_local_subtract (lhs, rhs, sect) 78 79 /* dwarf2dbg.c. */ 80 #define DWARF2_USE_FIXED_ADVANCE_PC 1 81 82 /* write.c. */ 83 extern long nds32_pcrel_from_section (struct fix *, segT); 84 extern bool nds32_fix_adjustable (struct fix *); 85 extern void nds32_frob_file (void); 86 extern void nds32_post_relax_hook (void); 87 extern void nds32_frob_file_before_fix (void); 88 extern void elf_nds32_final_processing (void); 89 extern int nds32_validate_fix_sub (struct fix *, segT); 90 extern int nds32_force_relocation (struct fix *); 91 extern void nds32_set_section_relocs (asection *, arelent ** , unsigned int); 92 93 /* Fill in rs_align_code fragments. TODO: Review this. */ 94 extern void nds32_handle_align (fragS *); 95 extern int nds32_relax_frag (segT, fragS *, long); 96 extern int tc_nds32_regname_to_dw2regnum (char *); 97 extern void tc_nds32_frame_initial_instructions (void); 98 99 #define MD_PCREL_FROM_SECTION(fix, sect) nds32_pcrel_from_section (fix, sect) 100 #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 0 101 #define tc_fix_adjustable(FIX) nds32_fix_adjustable (FIX) 102 #define md_apply_fix(fixP, addn, seg) nds32_apply_fix (fixP, addn, seg) 103 #define md_post_relax_hook nds32_post_relax_hook () 104 #define tc_frob_file_before_fix() nds32_frob_file_before_fix () 105 #define elf_tc_final_processing() elf_nds32_final_processing () 106 /* For DIFF relocations. The default behavior is inconsistent with the 107 asm internal document. */ 108 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \ 109 (GENERIC_FORCE_RELOCATION_SUB_SAME (FIX, SEC) \ 110 || TC_FORCE_RELOCATION (FIX)) 111 #define TC_FORCE_RELOCATION(fix) nds32_force_relocation (fix) 112 #define TC_VALIDATE_FIX_SUB(FIX,SEG) nds32_validate_fix_sub (FIX,SEG) 113 #define SET_SECTION_RELOCS(sec, relocs, n) nds32_set_section_relocs (sec, relocs, n) 114 /* Values passed to md_apply_fix don't include the symbol value. */ 115 #define MD_APPLY_SYM_VALUE(FIX) 0 116 #define HANDLE_ALIGN(f) nds32_handle_align (f) 117 #undef DIFF_EXPR_OK /* They should be fixed in linker. */ 118 #define md_relax_frag(segment, fragP, stretch) nds32_relax_frag (segment, fragP, stretch) 119 #define WORKING_DOT_WORD /* We don't need to handle .word strangely. */ 120 /* Using to chain fixup with previous fixup. */ 121 #define TC_FIX_TYPE struct fix * 122 #define TC_INIT_FIX_DATA(fixP) \ 123 do \ 124 { \ 125 fixP->tc_fix_data = NULL; \ 126 } \ 127 while (0) 128 129 /* read.c. */ 130 /* Extend GAS macro handling capability. */ 131 extern void nds32_macro_start (void); 132 extern void nds32_macro_end (void); 133 extern void nds32_macro_info (void *); 134 extern void nds32_start_line_hook (void); 135 extern void nds32_elf_section_change_hook (void); 136 extern void md_begin (void); 137 extern void md_end (void); 138 extern int nds32_start_label (int, int); 139 extern void nds32_cleanup (void); 140 extern void nds32_flush_pending_output (void); 141 extern void nds32_cons_align (int); 142 extern void nds32_check_label (symbolS *); 143 extern void nds32_frob_label (symbolS *); 144 extern void nds32_pre_do_align (int, char *, int, int); 145 extern void nds32_do_align (int); 146 147 #define md_macro_start() nds32_macro_start () 148 #define md_macro_end() nds32_macro_end () 149 #define md_macro_info(args) nds32_macro_info (args) 150 #define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) \ 151 (NEXT_CHAR == ':' && nds32_start_label (0, 0)) 152 #define tc_check_label(label) nds32_check_label (label) 153 #define tc_frob_label(label) nds32_frob_label (label) 154 #define md_end md_end 155 #define md_start_line_hook() nds32_start_line_hook () 156 #define md_cons_align(n) nds32_cons_align (n) 157 /* COLE: TODO: Review md_do_align. */ 158 #define md_do_align(N, FILL, LEN, MAX, LABEL) \ 159 nds32_pre_do_align (N, FILL, LEN, MAX); \ 160 if ((N) > 1 && (subseg_text_p (now_seg) \ 161 || startswith (now_seg->name, ".gcc_except_table"))) \ 162 nds32_do_align (N); \ 163 goto LABEL; 164 #define md_elf_section_change_hook() nds32_elf_section_change_hook () 165 #define md_flush_pending_output() nds32_flush_pending_output () 166 #define md_cleanup() nds32_cleanup () 167 #define LOCAL_LABELS_FB 1 /* Permit temporary numeric labels. */ 168 169 /* frags.c. */ 170 171 enum FRAG_ATTR 172 { 173 NDS32_FRAG_RELAXABLE = 0x1, 174 NDS32_FRAG_RELAXED = 0x2, 175 NDS32_FRAG_BRANCH = 0x4, 176 NDS32_FRAG_LABEL = 0x8, 177 NDS32_FRAG_FINAL = 0x10, 178 NDS32_FRAG_RELAXABLE_BRANCH = 0x20, 179 NDS32_FRAG_ALIGN = 0x40 180 }; 181 182 struct nds32_frag_type 183 { 184 relax_substateT flag; 185 struct nds32_opcode *opcode; 186 uint32_t insn; 187 /* To Save previous label fixup if existence. */ 188 struct fix *fixup; 189 }; 190 191 extern void nds32_frag_init (fragS *); 192 193 #define TC_FRAG_TYPE struct nds32_frag_type 194 #define TC_FRAG_INIT(fragP, max_bytes) nds32_frag_init (fragP) 195 196 /* CFI directive. */ 197 extern void nds32_elf_frame_initial_instructions (void); 198 extern int tc_nds32_regname_to_dw2regnum (char *); 199 200 #define TARGET_USE_CFIPOP 1 201 #define DWARF2_DEFAULT_RETURN_COLUMN 30 202 #define DWARF2_CIE_DATA_ALIGNMENT -4 203 #define DWARF2_LINE_MIN_INSN_LENGTH 2 204 205 #define tc_regname_to_dw2regnum tc_nds32_regname_to_dw2regnum 206 #define tc_cfi_frame_initial_instructions tc_nds32_frame_initial_instructions 207 208 /* COLE: TODO: Review These. They seem to be obsoleted. */ 209 #if 1 210 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ 211 ((FIX)->fx_addsy == NULL \ 212 || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \ 213 && ! S_IS_WEAK ((FIX)->fx_addsy) \ 214 && S_IS_DEFINED ((FIX)->fx_addsy) \ 215 && ! S_IS_COMMON ((FIX)->fx_addsy))) 216 #define TC_HANDLES_FX_DONE 217 #endif 218 219 /* Because linker may relax the code, assemble-time expression 220 optimization is not allowed. */ 221 #define md_allow_eh_opt 0 222 223 /* For nds32 relax. */ 224 enum nds32_br_range 225 { 226 BR_RANGE_S256 = 0, 227 BR_RANGE_S16K, 228 BR_RANGE_S64K, 229 BR_RANGE_S16M, 230 BR_RANGE_U4G, 231 BR_RANGE_NUM 232 }; 233 234 enum nds32_ramp 235 { 236 NDS32_CREATE_LABEL = 1, 237 NDS32_RELAX = (1 << 1), /* Obsolete in the future. */ 238 NDS32_ORIGIN = (1 << 2), 239 NDS32_INSN16 = (1 << 3), 240 NDS32_PTR = (1 << 4), 241 NDS32_ABS = (1 << 5), 242 NDS32_HINT = (1 << 6), 243 NDS32_FIX = (1 << 7), 244 NDS32_ADDEND = (1 << 8), 245 NDS32_SYM = (1 << 9), 246 NDS32_PCREL = (1 << 10), 247 NDS32_PTR_PATTERN = (1 << 11), 248 NDS32_PTR_MULTIPLE = (1 << 12), 249 NDS32_GROUP = (1 << 13), 250 NDS32_SYM_DESC_MEM = (1 << 14) 251 }; 252 253 typedef struct nds32_relax_fixup_info 254 { 255 int offset; 256 int size; 257 /* Reverse branch has to jump to the end of instruction pattern. */ 258 int ramp; 259 enum bfd_reloc_code_real r_type; 260 } nds32_relax_fixup_info_t; 261 262 typedef struct nds32_cond_field 263 { 264 int offset; 265 int bitpos; /* Register position. */ 266 int bitmask; /* Number of register bits. */ 267 bool signed_extend; 268 } nds32_cond_field_t; 269 270 /* The max relaxation pattern is 20-bytes including the nop. */ 271 #define NDS32_MAXCHAR 20 272 /* In current, the max extended number of instruction for one pseudo instruction 273 is 6, but its number of relocation may be 12. */ 274 #define MAX_RELAX_NUM 6 275 #define MAX_RELAX_FIX 12 276 277 typedef struct nds32_relax_info 278 { 279 /* Opcode for the instruction. */ 280 const char *opcode; 281 enum nds32_br_range br_range; 282 nds32_cond_field_t cond_field[MAX_RELAX_NUM]; /* TODO: Reuse nds32_field? */ 283 /* Code sequences for different branch range. */ 284 uint32_t relax_code_seq[BR_RANGE_NUM][MAX_RELAX_NUM]; 285 nds32_cond_field_t relax_code_condition[BR_RANGE_NUM][MAX_RELAX_NUM]; 286 unsigned int relax_code_size[BR_RANGE_NUM]; 287 int relax_branch_isize[BR_RANGE_NUM]; 288 nds32_relax_fixup_info_t relax_fixup[BR_RANGE_NUM][MAX_RELAX_FIX]; 289 } relax_info_t; 290 291 enum nds32_relax_hint_type 292 { 293 NDS32_RELAX_HINT_NONE = 0, 294 NDS32_RELAX_HINT_LA_FLSI, 295 NDS32_RELAX_HINT_LALS, 296 NDS32_RELAX_HINT_LA_PLT, 297 NDS32_RELAX_HINT_LA_GOT, 298 NDS32_RELAX_HINT_LA_GOTOFF, 299 NDS32_RELAX_HINT_TLS_START = 0x100, 300 NDS32_RELAX_HINT_TLS_LE_LS, 301 NDS32_RELAX_HINT_TLS_IE_LS, 302 NDS32_RELAX_HINT_TLS_IE_LA, 303 NDS32_RELAX_HINT_TLS_IEGP_LA, 304 NDS32_RELAX_HINT_TLS_DESC_LS, 305 }; 306 307 struct nds32_relax_hint_table 308 { 309 enum nds32_relax_hint_type main_type; 310 unsigned int relax_code_size; 311 uint32_t relax_code_seq[MAX_RELAX_NUM]; 312 nds32_relax_fixup_info_t relax_fixup[MAX_RELAX_FIX]; 313 }; 314 315 #endif /* TC_NDS32 */ 316