1 # This shell script emits a C file. -*- C -*- 2 # Copyright (C) 2012-2014 Free Software Foundation, Inc. 3 # Contributed by Andes Technology Corporation. 4 # 5 # This file is part of the GNU Binutils. 6 # 7 # This program 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 # This program 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; if not, write to the Free Software 19 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 # MA 02110-1301, USA. 21 # 22 23 fragment <<EOF 24 25 #include "libbfd.h" 26 #include "elf-bfd.h" 27 #include "elf/nds32.h" 28 #include "bfd_stdint.h" 29 #include "elf32-nds32.h" 30 31 static int relax_fp_as_gp = 1; /* --mrelax-omit-fp */ 32 static int eliminate_gc_relocs = 0; /* --meliminate-gc-relocs */ 33 static FILE *sym_ld_script = NULL; /* --mgen-symbol-ld-script=<file> */ 34 /* Disable if linking a dynamically linked executable. */ 35 static int load_store_relax = 1; 36 static int target_optimize = 0; /* Switch optimization. */ 37 static int relax_status = 0; /* Finished optimization. */ 38 static int relax_round = 0; /* Going optimization. */ 39 static FILE *ex9_export_file = NULL; /* --mexport-ex9=<file> */ 40 static FILE *ex9_import_file = NULL; /* --mimport-ex9=<file> */ 41 static int update_ex9_table = 0; /* --mupdate-ex9. */ 42 static int ex9_limit = 511; 43 static bfd_boolean ex9_loop_aware = FALSE; /* Ignore ex9 if inside a loop. */ 44 static bfd_boolean ifc_loop_aware = FALSE; /* Ignore ifc if inside a loop. */ 45 46 /* Save the target options into output bfd to avoid using to many global 47 variables. Do this after the output has been created, but before 48 inputs are read. */ 49 static void 50 nds32_elf_create_output_section_statements (void) 51 { 52 if (strstr (bfd_get_target (link_info.output_bfd), "nds32") == NULL) 53 { 54 /* Check the output target is nds32. */ 55 einfo ("%F%X%P: error: Cannot change output format whilst " 56 "linking NDS32 binaries.\n"); 57 return; 58 } 59 60 bfd_elf32_nds32_set_target_option (&link_info, relax_fp_as_gp, 61 eliminate_gc_relocs, 62 sym_ld_script, 63 load_store_relax, 64 target_optimize, relax_status, relax_round, 65 ex9_export_file, ex9_import_file, 66 update_ex9_table, ex9_limit, 67 ex9_loop_aware, ifc_loop_aware); 68 } 69 70 static void 71 nds32_elf_after_parse (void) 72 { 73 if (link_info.relocatable) 74 DISABLE_RELAXATION; 75 76 if (!RELAXATION_ENABLED) 77 { 78 target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON); 79 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); 80 relax_fp_as_gp = 0; 81 } 82 83 if (ex9_import_file != NULL) 84 { 85 ex9_export_file = NULL; 86 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); 87 } 88 else 89 update_ex9_table = 0; 90 91 if (link_info.shared) 92 { 93 target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON); 94 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); 95 } 96 97 after_parse_default (); 98 } 99 100 static void 101 nds32_elf_after_open (void) 102 { 103 unsigned int arch_ver = (unsigned int)-1; 104 unsigned int abi_ver = (unsigned int)-1; 105 bfd *abfd; 106 107 /* For now, make sure all object files are of the same architecture. 108 We may try to merge object files with different architecture together. */ 109 for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) 110 { 111 if (arch_ver == (unsigned int)-1 && E_N1_ARCH != (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH)) 112 arch_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ARCH ; 113 114 if (abi_ver == (unsigned int)-1) 115 { 116 /* Initialize ABI version, if not ABI0. 117 (OS uses empty file to create empty ELF with ABI0). */ 118 if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0) 119 abi_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ABI ; 120 } 121 else if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0 122 && abi_ver != (elf_elfheader (abfd)->e_flags & EF_NDS_ABI)) 123 { 124 /* Incompatible objects. */ 125 einfo (_("%F%B: ABI version of object files mismatched\n"), abfd); 126 } 127 128 #if defined NDS32_EX9_EXT 129 /* Append .ex9.itable section in the last input object file. */ 130 if (abfd->link_next == NULL && (target_optimize & NDS32_RELAX_EX9_ON)) 131 { 132 asection *itable; 133 struct bfd_link_hash_entry *h; 134 itable = bfd_make_section_with_flags (abfd, ".ex9.itable", 135 SEC_CODE | SEC_ALLOC | SEC_LOAD 136 | SEC_HAS_CONTENTS | SEC_READONLY 137 | SEC_IN_MEMORY | SEC_KEEP); 138 if (itable) 139 { 140 itable->gc_mark = 1; 141 itable->alignment_power = 2; 142 itable->size = 0x1000; 143 itable->contents = bfd_zalloc (abfd, itable->size); 144 145 /* Add a symbol in the head of ex9.itable to objdump clearly. */ 146 h = bfd_link_hash_lookup (link_info.hash, "_EX9_BASE_", 147 FALSE, FALSE, FALSE); 148 _bfd_generic_link_add_one_symbol 149 (&link_info, link_info.output_bfd, "_EX9_BASE_", 150 BSF_GLOBAL | BSF_WEAK, itable, 0, (const char *) NULL, FALSE, 151 get_elf_backend_data (link_info.output_bfd)->collect, &h); 152 } 153 } 154 #endif 155 } 156 157 /* Check object files if the target is dynamic linked executable 158 or shared object. */ 159 if (elf_hash_table (&link_info)->dynamic_sections_created 160 || link_info.shared || link_info.pie) 161 { 162 for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) 163 { 164 if (!(elf_elfheader (abfd)->e_flags & E_NDS32_HAS_PIC)) 165 { 166 /* Non-PIC object file is used. */ 167 if (link_info.shared || link_info.pie) 168 { 169 /* For PIE or shared object, all input must be PIC. */ 170 einfo (_("%B: must use -fpic to compile this file " 171 "for shared object or PIE\n"), abfd); 172 } 173 else 174 { 175 /* Dynamic linked executable with SDA and non-PIC. 176 Turn off load/store relaxtion. */ 177 /* TODO: This may support in the future. */ 178 load_store_relax = 0 ; 179 relax_fp_as_gp = 0; 180 } 181 } 182 } 183 /* Turn off relax when building shared object or PIE 184 until we can support their relaxation. */ 185 } 186 187 /* Call the standard elf routine. */ 188 gld${EMULATION_NAME}_after_open (); 189 } 190 191 static void 192 nds32_elf_after_allocation (void) 193 { 194 if (target_optimize & NDS32_RELAX_EX9_ON 195 || (ex9_import_file != NULL && update_ex9_table == 1)) 196 { 197 /* Initialize ex9 hash table. */ 198 if (!nds32_elf_ex9_init ()) 199 return; 200 } 201 202 /* Call default after allocation callback. 203 1. This is where relaxation is done. 204 2. It calls gld${EMULATION_NAME}_map_segments to build ELF segment table. 205 3. Any relaxation requires relax being done must be called after it. */ 206 gld${EMULATION_NAME}_after_allocation (); 207 } 208 209 EOF 210 # Define some shell vars to insert bits of code into the standard elf 211 # parse_args and list_options functions. 212 # 213 PARSE_AND_LIST_PROLOGUE=' 214 #define OPTION_BASELINE 301 215 #define OPTION_ELIM_GC_RELOCS (OPTION_BASELINE + 1) 216 #define OPTION_FP_AS_GP (OPTION_BASELINE + 2) 217 #define OPTION_NO_FP_AS_GP (OPTION_BASELINE + 3) 218 #define OPTION_REDUCE_FP_UPDATE (OPTION_BASELINE + 4) 219 #define OPTION_NO_REDUCE_FP_UPDATE (OPTION_BASELINE + 5) 220 #define OPTION_EXPORT_SYMBOLS (OPTION_BASELINE + 6) 221 222 /* These are only available to ex9. */ 223 #if defined NDS32_EX9_EXT 224 #define OPTION_EX9_BASELINE 320 225 #define OPTION_EX9_TABLE (OPTION_EX9_BASELINE + 1) 226 #define OPTION_NO_EX9_TABLE (OPTION_EX9_BASELINE + 2) 227 #define OPTION_EXPORT_EX9 (OPTION_EX9_BASELINE + 3) 228 #define OPTION_IMPORT_EX9 (OPTION_EX9_BASELINE + 4) 229 #define OPTION_UPDATE_EX9 (OPTION_EX9_BASELINE + 5) 230 #define OPTION_EX9_LIMIT (OPTION_EX9_BASELINE + 6) 231 #define OPTION_EX9_LOOP (OPTION_EX9_BASELINE + 7) 232 #endif 233 234 /* These are only available to link-time ifc. */ 235 #if defined NDS32_IFC_EXT 236 #define OPTION_IFC_BASELINE 340 237 #define OPTION_JUMP_IFC (OPTION_IFC_BASELINE + 1) 238 #define OPTION_NO_JUMP_IFC (OPTION_IFC_BASELINE + 2) 239 #define OPTION_IFC_LOOP (OPTION_IFC_BASELINE + 3) 240 #endif 241 ' 242 PARSE_AND_LIST_LONGOPTS=' 243 { "mfp-as-gp", no_argument, NULL, OPTION_FP_AS_GP}, 244 { "mno-fp-as-gp", no_argument, NULL, OPTION_NO_FP_AS_GP}, 245 { "mexport-symbols", required_argument, NULL, OPTION_EXPORT_SYMBOLS}, 246 /* These are deprecated options. Remove them in the future. */ 247 { "mrelax-reduce-fp-update", no_argument, NULL, OPTION_REDUCE_FP_UPDATE}, 248 { "mrelax-no-reduce-fp-update", no_argument, NULL, OPTION_NO_REDUCE_FP_UPDATE}, 249 { "mbaseline", required_argument, NULL, OPTION_BASELINE}, 250 { "meliminate-gc-relocs", no_argument, NULL, OPTION_ELIM_GC_RELOCS}, 251 { "mrelax-omit-fp", no_argument, NULL, OPTION_FP_AS_GP}, 252 { "mrelax-no-omit-fp", no_argument, NULL, OPTION_NO_FP_AS_GP}, 253 { "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS}, 254 /* These are specific optioins for ex9-ext support. */ 255 #if defined NDS32_EX9_EXT 256 { "mex9", no_argument, NULL, OPTION_EX9_TABLE}, 257 { "mno-ex9", no_argument, NULL, OPTION_NO_EX9_TABLE}, 258 { "mexport-ex9", required_argument, NULL, OPTION_EXPORT_EX9}, 259 { "mimport-ex9", required_argument, NULL, OPTION_IMPORT_EX9}, 260 { "mupdate-ex9", no_argument, NULL, OPTION_UPDATE_EX9}, 261 { "mex9-limit", required_argument, NULL, OPTION_EX9_LIMIT}, 262 { "mex9-loop-aware", no_argument, NULL, OPTION_EX9_LOOP}, 263 #endif 264 /* These are specific optioins for ifc-ext support. */ 265 #if defined NDS32_IFC_EXT 266 { "mifc", no_argument, NULL, OPTION_JUMP_IFC}, 267 { "mno-ifc", no_argument, NULL, OPTION_NO_JUMP_IFC}, 268 { "mifc-loop-aware", no_argument, NULL, OPTION_IFC_LOOP}, 269 #endif 270 ' 271 PARSE_AND_LIST_OPTIONS=' 272 fprintf (file, _("\ 273 --m[no-]fp-as-gp Disable/enable fp-as-gp relaxation\n\ 274 --mexport-symbols=FILE Exporting symbols in linker script\n\ 275 ")); 276 277 #if defined NDS32_EX9_EXT 278 fprintf (file, _("\ 279 --m[no-]ex9 Disable/enable link-time EX9 relaxation\n\ 280 --mexport-ex9=FILE Export EX9 table after linking\n\ 281 --mimport-ex9=FILE Import Ex9 table for EX9 relaxation\n\ 282 --mupdate-ex9 Update existing EX9 table\n\ 283 --mex9-limit=NUM Maximum number of entries in ex9 table\n\ 284 --mex9-loop-aware Avoid generate EX9 instruction inside loop\n\ 285 ")); 286 #endif 287 288 #if defined NDS32_IFC_EXT 289 fprintf (file, _("\ 290 --m[no-]ifc Disable/enable link-time IFC optimization\n\ 291 --mifc-loop-aware Avoid generate IFC instruction inside loop\n\ 292 ")); 293 #endif 294 ' 295 PARSE_AND_LIST_ARGS_CASES=' 296 case OPTION_BASELINE: 297 einfo ("%P: --mbaseline is not used anymore.\n"); 298 break; 299 case OPTION_ELIM_GC_RELOCS: 300 eliminate_gc_relocs = 1; 301 break; 302 case OPTION_FP_AS_GP: 303 case OPTION_NO_FP_AS_GP: 304 relax_fp_as_gp = (optc == OPTION_FP_AS_GP); 305 break; 306 case OPTION_REDUCE_FP_UPDATE: 307 case OPTION_NO_REDUCE_FP_UPDATE: 308 einfo ("%P: --relax-[no-]reduce-fp-updat is not used anymore.\n"); 309 break; 310 case OPTION_EXPORT_SYMBOLS: 311 if (!optarg) 312 einfo (_("Missing file for --mexport-symbols.\n"), optarg); 313 314 if(strcmp (optarg, "-") == 0) 315 sym_ld_script = stdout; 316 else 317 { 318 sym_ld_script = fopen (optarg, FOPEN_WT); 319 if(sym_ld_script == NULL) 320 einfo (_("%P%F: cannot open map file %s: %E.\n"), optarg); 321 } 322 break; 323 #if defined NDS32_EX9_EXT 324 case OPTION_EX9_TABLE: 325 target_optimize = target_optimize | NDS32_RELAX_EX9_ON; 326 break; 327 case OPTION_NO_EX9_TABLE: 328 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); 329 break; 330 case OPTION_EXPORT_EX9: 331 if (!optarg) 332 einfo (_("Missing file for --mexport-ex9=<file>.\n")); 333 334 if(strcmp (optarg, "-") == 0) 335 ex9_export_file = stdout; 336 else 337 { 338 ex9_export_file = fopen (optarg, "wb"); 339 if(ex9_export_file == NULL) 340 einfo (_("ERROR %P%F: cannot open ex9 export file %s.\n"), optarg); 341 } 342 break; 343 case OPTION_IMPORT_EX9: 344 if (!optarg) 345 einfo (_("Missing file for --mimport-ex9=<file>.\n")); 346 347 ex9_import_file = fopen (optarg, "rb+"); 348 if(ex9_import_file == NULL) 349 einfo (_("ERROR %P%F: cannot open ex9 import file %s.\n"), optarg); 350 break; 351 case OPTION_UPDATE_EX9: 352 update_ex9_table = 1; 353 break; 354 case OPTION_EX9_LIMIT: 355 if (optarg) 356 { 357 ex9_limit = atoi (optarg); 358 if (ex9_limit > 511 || ex9_limit < 1) 359 { 360 einfo (_("ERROR: the range of ex9_limit must between 1 and 511\n")); 361 exit (1); 362 } 363 } 364 break; 365 case OPTION_EX9_LOOP: 366 target_optimize = target_optimize | NDS32_RELAX_EX9_ON; 367 ex9_loop_aware = 1; 368 break; 369 #endif 370 #if defined NDS32_IFC_EXT 371 case OPTION_JUMP_IFC: 372 target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON; 373 break; 374 case OPTION_NO_JUMP_IFC: 375 target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON); 376 break; 377 case OPTION_IFC_LOOP: 378 target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON; 379 ifc_loop_aware = 1; 380 break; 381 #endif 382 ' 383 LDEMUL_AFTER_OPEN=nds32_elf_after_open 384 LDEMUL_AFTER_PARSE=nds32_elf_after_parse 385 LDEMUL_AFTER_ALLOCATION=nds32_elf_after_allocation 386 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=nds32_elf_create_output_section_statements 387
