1 /* tc-nds32.h -- Header file for tc-nds32.c. 2 Copyright (C) 2012-2014 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 "bfd_stdint.h" 26 27 #define LISTING_HEADER \ 28 (target_big_endian ? "NDS32 GAS" : "NDS32 GAS Little Endian") 29 30 /* The target BFD architecture. */ 31 #define TARGET_ARCH bfd_arch_nds32 32 33 /* mapping to mach_table[5] */ 34 #define ISA_V1 bfd_mach_n1h 35 #define ISA_V2 bfd_mach_n1h_v2 36 #define ISA_V3 bfd_mach_n1h_v3 37 #define ISA_V3M bfd_mach_n1h_v3m 38 39 /* Default to big endian. Please note that for Andes architecture, 40 instructions are always in big-endian format. */ 41 #ifndef TARGET_BYTES_BIG_ENDIAN 42 #define TARGET_BYTES_BIG_ENDIAN 1 43 #endif 44 45 /* as.c. */ 46 /* Extend GAS command line option handling capability. */ 47 extern int nds32_parse_option (int, char *); 48 extern void nds32_after_parse_args (void); 49 /* The endianness of the target format may change based on command 50 line arguments. */ 51 extern const char * nds32_target_format (void); 52 53 #define md_parse_option(optc, optarg) nds32_parse_option (optc, optarg) 54 #define md_after_parse_args() nds32_after_parse_args () 55 #define TARGET_FORMAT nds32_target_format() 56 57 /* expr.c */ 58 extern int nds32_parse_name (char const *, expressionS *, enum expr_mode, char *); 59 extern bfd_boolean nds32_allow_local_subtract (expressionS *, expressionS *, segT); 60 #define md_parse_name(name, exprP, mode, nextcharP) \ 61 nds32_parse_name (name, exprP, mode, nextcharP) 62 #define md_allow_local_subtract(lhs,rhs,sect) nds32_allow_local_subtract (lhs, rhs, sect) 63 64 /* dwarf2dbg.c. */ 65 #define DWARF2_USE_FIXED_ADVANCE_PC 1 66 67 /* write.c. */ 68 extern long nds32_pcrel_from_section (struct fix *, segT); 69 extern bfd_boolean nds32_fix_adjustable (struct fix *); 70 extern void nds32_frob_file (void); 71 extern void nds32_post_relax_hook (void); 72 extern void nds32_frob_file_before_fix (void); 73 extern void elf_nds32_final_processing (void); 74 extern int nds32_validate_fix_sub (struct fix *, segT); 75 extern int nds32_force_relocation (struct fix *); 76 extern void nds32_set_section_relocs (asection *, arelent ** , unsigned int); 77 78 /* Fill in rs_align_code fragments. TODO: Review this. */ 79 extern void nds32_handle_align (fragS *); 80 extern int nds32_relax_frag (segT, fragS *, long); 81 extern int tc_nds32_regname_to_dw2regnum (char *); 82 extern void tc_nds32_frame_initial_instructions (void); 83 84 #define MD_PCREL_FROM_SECTION(fix, sect) nds32_pcrel_from_section (fix, sect) 85 #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 0 86 #define tc_fix_adjustable(FIX) nds32_fix_adjustable (FIX) 87 #define md_apply_fix(fixP, addn, seg) nds32_apply_fix (fixP, addn, seg) 88 #define md_post_relax_hook nds32_post_relax_hook () 89 #define tc_frob_file_before_fix() nds32_frob_file_before_fix () 90 #define elf_tc_final_processing() elf_nds32_final_processing () 91 /* For DIFF relocations. The default behavior is inconsistent with the 92 asm internal document. */ 93 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEC) \ 94 (! SEG_NORMAL (SEC) || TC_FORCE_RELOCATION (FIX)) 95 #define TC_FORCE_RELOCATION(fix) nds32_force_relocation (fix) 96 #define TC_VALIDATE_FIX_SUB(FIX,SEG) nds32_validate_fix_sub (FIX,SEG) 97 #define SET_SECTION_RELOCS(sec, relocs, n) nds32_set_section_relocs (sec, relocs, n) 98 /* Values passed to md_apply_fix don't include the symbol value. */ 99 #define MD_APPLY_SYM_VALUE(FIX) 0 100 #define HANDLE_ALIGN(f) nds32_handle_align (f) 101 #undef DIFF_EXPR_OK /* They should be fixed in linker. */ 102 #define md_relax_frag(segment, fragP, stretch) nds32_relax_frag (segment, fragP, stretch) 103 #define WORKING_DOT_WORD /* We don't need to handle .word strangely. */ 104 /* Using to chain fixup with previous fixup. */ 105 #define TC_FIX_TYPE struct fix * 106 #define TC_INIT_FIX_DATA(fixP) \ 107 do \ 108 { \ 109 fixP->tc_fix_data = NULL; \ 110 } \ 111 while (0) 112 113 /* read.c. */ 114 /* Extend GAS macro handling capability. */ 115 extern void nds32_macro_start (void); 116 extern void nds32_macro_end (void); 117 extern void nds32_macro_info (void *); 118 extern void nds32_start_line_hook (void); 119 extern void nds32_elf_section_change_hook (void); 120 extern void md_begin (void); 121 extern void md_end (void); 122 extern int nds32_start_label (int, int); 123 extern void nds32_cleanup (void); 124 extern void nds32_flush_pending_output (void); 125 extern void nds32_cons_align (int); 126 extern void nds32_check_label (symbolS *); 127 extern void nds32_frob_label (symbolS *); 128 extern void nds32_pre_do_align (int, char *, int, int); 129 extern void nds32_do_align (int); 130 131 #define md_macro_start() nds32_macro_start () 132 #define md_macro_end() nds32_macro_end () 133 #define md_macro_info(args) nds32_macro_info (args) 134 #define TC_START_LABEL(C, S, STR) (C == ':' && nds32_start_label (0, 0)) 135 #define tc_check_label(label) nds32_check_label (label) 136 #define tc_frob_label(label) nds32_frob_label (label) 137 #define md_end md_end 138 #define md_start_line_hook() nds32_start_line_hook () 139 #define md_cons_align(n) nds32_cons_align (n) 140 /* COLE: TODO: Review md_do_align. */ 141 #define md_do_align(N, FILL, LEN, MAX, LABEL) \ 142 nds32_pre_do_align (N, FILL, LEN, MAX); \ 143 if ((N) > 1 && (subseg_text_p (now_seg) \ 144 || strncmp (now_seg->name, ".gcc_except_table", sizeof(".gcc_except_table") - 1) == 0)) \ 145 nds32_do_align (N); \ 146 goto LABEL; 147 #define md_elf_section_change_hook() nds32_elf_section_change_hook () 148 #define md_flush_pending_output() nds32_flush_pending_output () 149 #define md_cleanup() nds32_cleanup () 150 #define LOCAL_LABELS_FB 1 /* Permit temporary numeric labels. */ 151 152 /* frags.c. */ 153 154 #define NDS32_FRAG_RELAXABLE 0x1 155 #define NDS32_FRAG_RELAXED 0x2 156 #define NDS32_FRAG_BRANCH 0x4 157 #define NDS32_FRAG_LABEL 0x8 158 159 struct nds32_frag_type 160 { 161 relax_substateT flag; 162 struct nds32_opcode *opcode; 163 uint32_t insn; 164 /* To Save previos label fixup if existence. */ 165 struct fix *fixup; 166 }; 167 168 extern void nds32_frag_init (fragS *); 169 170 #define TC_FRAG_TYPE struct nds32_frag_type 171 #define TC_FRAG_INIT(fragP) nds32_frag_init (fragP) 172 173 /* CFI directive. */ 174 extern void nds32_elf_frame_initial_instructions (void); 175 extern int tc_nds32_regname_to_dw2regnum (char *); 176 177 #define TARGET_USE_CFIPOP 1 178 #define DWARF2_DEFAULT_RETURN_COLUMN 30 179 #define DWARF2_CIE_DATA_ALIGNMENT -4 180 #define DWARF2_LINE_MIN_INSN_LENGTH 2 181 182 #define tc_regname_to_dw2regnum tc_nds32_regname_to_dw2regnum 183 #define tc_cfi_frame_initial_instructions tc_nds32_frame_initial_instructions 184 185 /* COLE: TODO: Review These. They seem to be obsoleted. */ 186 #if 1 187 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ 188 ((FIX)->fx_addsy == NULL \ 189 || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \ 190 && ! S_IS_WEAK ((FIX)->fx_addsy) \ 191 && S_IS_DEFINED ((FIX)->fx_addsy) \ 192 && ! S_IS_COMMON ((FIX)->fx_addsy))) 193 #define TC_HANDLES_FX_DONE 194 /* This arranges for gas/write.c to not apply a relocation if 195 obj_fix_adjustable() says it is not adjustable. */ 196 #define TC_FIX_ADJUSTABLE(fixP) obj_fix_adjustable (fixP) 197 #endif 198 199 /* Because linker may relax the code, assemble-time expression 200 optimization is not allowed. */ 201 #define md_allow_eh_opt 0 202 203 /* For nds32 relax. */ 204 enum nds32_br_range 205 { 206 BR_RANGE_S256 = 0, 207 BR_RANGE_S16K, 208 BR_RANGE_S64K, 209 BR_RANGE_S16M, 210 BR_RANGE_U4G, 211 BR_RANGE_NUM 212 }; 213 214 enum nds32_ramp 215 { 216 NDS32_CREATE_LABEL = 1, 217 NDS32_RELAX = (1 << 1), /* Obsolete in the future. */ 218 NDS32_ORIGIN = (1 << 2), 219 NDS32_INSN16 = (1 << 3), 220 NDS32_PTR = (1 << 4), 221 NDS32_ABS = (1 << 5), 222 NDS32_HINT = (1 << 6), 223 NDS32_FIX = (1 << 7), 224 NDS32_ADDEND = (1 << 8), 225 NDS32_SYM = (1 << 9) 226 }; 227 228 typedef struct nds32_relax_fixup_info 229 { 230 int offset; 231 int size; 232 /* Reverse branch has to jump to the end of instruction pattern. */ 233 int ramp; 234 enum bfd_reloc_code_real r_type; 235 } nds32_relax_fixup_info_t; 236 237 typedef struct nds32_cond_field 238 { 239 int offset; 240 int bitpos; /* Register position. */ 241 int bitmask; /* Number of register bits. */ 242 bfd_boolean signed_extend; 243 } nds32_cond_field_t; 244 245 /* The max relaxation pattern is 20-bytes including the nop. */ 246 #define NDS32_MAXCHAR 20 247 /* In current, the max entend number of instruction for one pseudo instruction 248 is 4, but its number of relocation may be 12. */ 249 #define MAX_RELAX_NUM 4 250 #define MAX_RELAX_FIX 12 251 252 typedef struct nds32_relax_info 253 { 254 /* Opcode for the instruction. */ 255 const char *opcode; 256 enum nds32_br_range br_range; 257 nds32_cond_field_t cond_field[MAX_RELAX_NUM]; /* TODO: Reuse nds32_field? */ 258 /* Code sequences for different branch range. */ 259 uint32_t relax_code_seq[BR_RANGE_NUM][MAX_RELAX_NUM]; 260 nds32_cond_field_t relax_code_condition[BR_RANGE_NUM][MAX_RELAX_NUM]; 261 unsigned int relax_code_size[BR_RANGE_NUM]; 262 int relax_branch_isize[BR_RANGE_NUM]; 263 nds32_relax_fixup_info_t relax_fixup[BR_RANGE_NUM][MAX_RELAX_FIX]; 264 } relax_info_t; 265 266 enum nds32_relax_hint_type 267 { 268 NDS32_RELAX_HINT_NONE = 0, 269 NDS32_RELAX_HINT_LA, 270 NDS32_RELAX_HINT_LS 271 }; 272 273 struct nds32_relax_hint_table 274 { 275 enum nds32_relax_hint_type main_type; 276 unsigned int relax_code_size; 277 uint32_t relax_code_seq[MAX_RELAX_NUM]; 278 nds32_relax_fixup_info_t relax_fixup[MAX_RELAX_FIX]; 279 }; 280 281 #endif /* TC_NDS32 */ 282