1 /* Generate kernel symbol version hashes. 2 Copyright 1996, 1997 Linux International. 3 4 New implementation contributed by Richard Henderson <rth@tamu.edu> 5 Based on original work by Bjorn Ekwall <bj0rn@blox.se> 6 7 This file was part of the Linux modutils 2.4.22: moved back into the 8 kernel sources by Rusty Russell/Kai Germaschewski. 9 10 This program is free software; you can redistribute it and/or modify it 11 under the terms of the GNU General Public License as published by the 12 Free Software Foundation; either version 2 of the License, or (at your 13 option) any later version. 14 15 This program is distributed in the hope that it will be useful, but 16 WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program; if not, write to the Free Software Foundation, 22 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 23 24 #include <stdio.h> 25 #include <string.h> 26 #include <stdlib.h> 27 #include <unistd.h> 28 #include <assert.h> 29 #include <stdarg.h> 30 #ifdef __GNU_LIBRARY__ 31 #include <getopt.h> 32 #endif /* __GNU_LIBRARY__ */ 33 34 #include "genksyms.h" 35 /*----------------------------------------------------------------------*/ 36 37 #define HASH_BUCKETS 4096 38 39 static struct symbol *symtab[HASH_BUCKETS]; 40 static FILE *debugfile; 41 42 int cur_line = 1; 43 char *cur_filename, *source_file; 44 int in_source_file; 45 46 static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types, 47 flag_preserve, flag_warnings; 48 static const char *arch = ""; 49 static const char *mod_prefix = ""; 50 51 static int errors; 52 static int nsyms; 53 54 static struct symbol *expansion_trail; 55 static struct symbol *visited_symbols; 56 57 static const struct { 58 int n; 59 const char *name; 60 } symbol_types[] = { 61 [SYM_NORMAL] = { 0, NULL}, 62 [SYM_TYPEDEF] = {'t', "typedef"}, 63 [SYM_ENUM] = {'e', "enum"}, 64 [SYM_STRUCT] = {'s', "struct"}, 65 [SYM_UNION] = {'u', "union"}, 66 [SYM_ENUM_CONST] = {'E', "enum constant"}, 67 }; 68 69 static int equal_list(struct string_list *a, struct string_list *b); 70 static void print_list(FILE * f, struct string_list *list); 71 static struct string_list *concat_list(struct string_list *start, ...); 72 static struct string_list *mk_node(const char *string); 73 static void print_location(void); 74 static void print_type_name(enum symbol_type type, const char *name); 75 76 /*----------------------------------------------------------------------*/ 77 78 static const unsigned int crctab32[] = { 79 0x00000000U, 0x77073096U, 0xee0e612cU, 0x990951baU, 0x076dc419U, 80 0x706af48fU, 0xe963a535U, 0x9e6495a3U, 0x0edb8832U, 0x79dcb8a4U, 81 0xe0d5e91eU, 0x97d2d988U, 0x09b64c2bU, 0x7eb17cbdU, 0xe7b82d07U, 82 0x90bf1d91U, 0x1db71064U, 0x6ab020f2U, 0xf3b97148U, 0x84be41deU, 83 0x1adad47dU, 0x6ddde4ebU, 0xf4d4b551U, 0x83d385c7U, 0x136c9856U, 84 0x646ba8c0U, 0xfd62f97aU, 0x8a65c9ecU, 0x14015c4fU, 0x63066cd9U, 85 0xfa0f3d63U, 0x8d080df5U, 0x3b6e20c8U, 0x4c69105eU, 0xd56041e4U, 86 0xa2677172U, 0x3c03e4d1U, 0x4b04d447U, 0xd20d85fdU, 0xa50ab56bU, 87 0x35b5a8faU, 0x42b2986cU, 0xdbbbc9d6U, 0xacbcf940U, 0x32d86ce3U, 88 0x45df5c75U, 0xdcd60dcfU, 0xabd13d59U, 0x26d930acU, 0x51de003aU, 89 0xc8d75180U, 0xbfd06116U, 0x21b4f4b5U, 0x56b3c423U, 0xcfba9599U, 90 0xb8bda50fU, 0x2802b89eU, 0x5f058808U, 0xc60cd9b2U, 0xb10be924U, 91 0x2f6f7c87U, 0x58684c11U, 0xc1611dabU, 0xb6662d3dU, 0x76dc4190U, 92 0x01db7106U, 0x98d220bcU, 0xefd5102aU, 0x71b18589U, 0x06b6b51fU, 93 0x9fbfe4a5U, 0xe8b8d433U, 0x7807c9a2U, 0x0f00f934U, 0x9609a88eU, 94 0xe10e9818U, 0x7f6a0dbbU, 0x086d3d2dU, 0x91646c97U, 0xe6635c01U, 95 0x6b6b51f4U, 0x1c6c6162U, 0x856530d8U, 0xf262004eU, 0x6c0695edU, 96 0x1b01a57bU, 0x8208f4c1U, 0xf50fc457U, 0x65b0d9c6U, 0x12b7e950U, 97 0x8bbeb8eaU, 0xfcb9887cU, 0x62dd1ddfU, 0x15da2d49U, 0x8cd37cf3U, 98 0xfbd44c65U, 0x4db26158U, 0x3ab551ceU, 0xa3bc0074U, 0xd4bb30e2U, 99 0x4adfa541U, 0x3dd895d7U, 0xa4d1c46dU, 0xd3d6f4fbU, 0x4369e96aU, 100 0x346ed9fcU, 0xad678846U, 0xda60b8d0U, 0x44042d73U, 0x33031de5U, 101 0xaa0a4c5fU, 0xdd0d7cc9U, 0x5005713cU, 0x270241aaU, 0xbe0b1010U, 102 0xc90c2086U, 0x5768b525U, 0x206f85b3U, 0xb966d409U, 0xce61e49fU, 103 0x5edef90eU, 0x29d9c998U, 0xb0d09822U, 0xc7d7a8b4U, 0x59b33d17U, 104 0x2eb40d81U, 0xb7bd5c3bU, 0xc0ba6cadU, 0xedb88320U, 0x9abfb3b6U, 105 0x03b6e20cU, 0x74b1d29aU, 0xead54739U, 0x9dd277afU, 0x04db2615U, 106 0x73dc1683U, 0xe3630b12U, 0x94643b84U, 0x0d6d6a3eU, 0x7a6a5aa8U, 107 0xe40ecf0bU, 0x9309ff9dU, 0x0a00ae27U, 0x7d079eb1U, 0xf00f9344U, 108 0x8708a3d2U, 0x1e01f268U, 0x6906c2feU, 0xf762575dU, 0x806567cbU, 109 0x196c3671U, 0x6e6b06e7U, 0xfed41b76U, 0x89d32be0U, 0x10da7a5aU, 110 0x67dd4accU, 0xf9b9df6fU, 0x8ebeeff9U, 0x17b7be43U, 0x60b08ed5U, 111 0xd6d6a3e8U, 0xa1d1937eU, 0x38d8c2c4U, 0x4fdff252U, 0xd1bb67f1U, 112 0xa6bc5767U, 0x3fb506ddU, 0x48b2364bU, 0xd80d2bdaU, 0xaf0a1b4cU, 113 0x36034af6U, 0x41047a60U, 0xdf60efc3U, 0xa867df55U, 0x316e8eefU, 114 0x4669be79U, 0xcb61b38cU, 0xbc66831aU, 0x256fd2a0U, 0x5268e236U, 115 0xcc0c7795U, 0xbb0b4703U, 0x220216b9U, 0x5505262fU, 0xc5ba3bbeU, 116 0xb2bd0b28U, 0x2bb45a92U, 0x5cb36a04U, 0xc2d7ffa7U, 0xb5d0cf31U, 117 0x2cd99e8bU, 0x5bdeae1dU, 0x9b64c2b0U, 0xec63f226U, 0x756aa39cU, 118 0x026d930aU, 0x9c0906a9U, 0xeb0e363fU, 0x72076785U, 0x05005713U, 119 0x95bf4a82U, 0xe2b87a14U, 0x7bb12baeU, 0x0cb61b38U, 0x92d28e9bU, 120 0xe5d5be0dU, 0x7cdcefb7U, 0x0bdbdf21U, 0x86d3d2d4U, 0xf1d4e242U, 121 0x68ddb3f8U, 0x1fda836eU, 0x81be16cdU, 0xf6b9265bU, 0x6fb077e1U, 122 0x18b74777U, 0x88085ae6U, 0xff0f6a70U, 0x66063bcaU, 0x11010b5cU, 123 0x8f659effU, 0xf862ae69U, 0x616bffd3U, 0x166ccf45U, 0xa00ae278U, 124 0xd70dd2eeU, 0x4e048354U, 0x3903b3c2U, 0xa7672661U, 0xd06016f7U, 125 0x4969474dU, 0x3e6e77dbU, 0xaed16a4aU, 0xd9d65adcU, 0x40df0b66U, 126 0x37d83bf0U, 0xa9bcae53U, 0xdebb9ec5U, 0x47b2cf7fU, 0x30b5ffe9U, 127 0xbdbdf21cU, 0xcabac28aU, 0x53b39330U, 0x24b4a3a6U, 0xbad03605U, 128 0xcdd70693U, 0x54de5729U, 0x23d967bfU, 0xb3667a2eU, 0xc4614ab8U, 129 0x5d681b02U, 0x2a6f2b94U, 0xb40bbe37U, 0xc30c8ea1U, 0x5a05df1bU, 130 0x2d02ef8dU 131 }; 132 133 static unsigned long partial_crc32_one(unsigned char c, unsigned long crc) 134 { 135 return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8); 136 } 137 138 static unsigned long partial_crc32(const char *s, unsigned long crc) 139 { 140 while (*s) 141 crc = partial_crc32_one(*s++, crc); 142 return crc; 143 } 144 145 static unsigned long crc32(const char *s) 146 { 147 return partial_crc32(s, 0xffffffff) ^ 0xffffffff; 148 } 149 150 /*----------------------------------------------------------------------*/ 151 152 static enum symbol_type map_to_ns(enum symbol_type t) 153 { 154 switch (t) { 155 case SYM_ENUM_CONST: 156 case SYM_NORMAL: 157 case SYM_TYPEDEF: 158 return SYM_NORMAL; 159 case SYM_ENUM: 160 case SYM_STRUCT: 161 case SYM_UNION: 162 return SYM_STRUCT; 163 } 164 return t; 165 } 166 167 struct symbol *find_symbol(const char *name, enum symbol_type ns, int exact) 168 { 169 unsigned long h = crc32(name) % HASH_BUCKETS; 170 struct symbol *sym; 171 172 for (sym = symtab[h]; sym; sym = sym->hash_next) 173 if (map_to_ns(sym->type) == map_to_ns(ns) && 174 strcmp(name, sym->name) == 0 && 175 sym->is_declared) 176 break; 177 178 if (exact && sym && sym->type != ns) 179 return NULL; 180 return sym; 181 } 182 183 static int is_unknown_symbol(struct symbol *sym) 184 { 185 struct string_list *defn; 186 187 return ((sym->type == SYM_STRUCT || 188 sym->type == SYM_UNION || 189 sym->type == SYM_ENUM) && 190 (defn = sym->defn) && defn->tag == SYM_NORMAL && 191 strcmp(defn->string, "}") == 0 && 192 (defn = defn->next) && defn->tag == SYM_NORMAL && 193 strcmp(defn->string, "UNKNOWN") == 0 && 194 (defn = defn->next) && defn->tag == SYM_NORMAL && 195 strcmp(defn->string, "{") == 0); 196 } 197 198 static struct symbol *__add_symbol(const char *name, enum symbol_type type, 199 struct string_list *defn, int is_extern, 200 int is_reference) 201 { 202 unsigned long h; 203 struct symbol *sym; 204 enum symbol_status status = STATUS_UNCHANGED; 205 /* The parser adds symbols in the order their declaration completes, 206 * so it is safe to store the value of the previous enum constant in 207 * a static variable. 208 */ 209 static int enum_counter; 210 static struct string_list *last_enum_expr; 211 212 if (type == SYM_ENUM_CONST) { 213 if (defn) { 214 free_list(last_enum_expr, NULL); 215 last_enum_expr = copy_list_range(defn, NULL); 216 enum_counter = 1; 217 } else { 218 struct string_list *expr; 219 char buf[20]; 220 221 snprintf(buf, sizeof(buf), "%d", enum_counter++); 222 if (last_enum_expr) { 223 expr = copy_list_range(last_enum_expr, NULL); 224 defn = concat_list(mk_node("("), 225 expr, 226 mk_node(")"), 227 mk_node("+"), 228 mk_node(buf), NULL); 229 } else { 230 defn = mk_node(buf); 231 } 232 } 233 } else if (type == SYM_ENUM) { 234 free_list(last_enum_expr, NULL); 235 last_enum_expr = NULL; 236 enum_counter = 0; 237 if (!name) 238 /* Anonymous enum definition, nothing more to do */ 239 return NULL; 240 } 241 242 h = crc32(name) % HASH_BUCKETS; 243 for (sym = symtab[h]; sym; sym = sym->hash_next) { 244 if (map_to_ns(sym->type) == map_to_ns(type) && 245 strcmp(name, sym->name) == 0) { 246 if (is_reference) 247 /* fall through */ ; 248 else if (sym->type == type && 249 equal_list(sym->defn, defn)) { 250 if (!sym->is_declared && sym->is_override) { 251 print_location(); 252 print_type_name(type, name); 253 fprintf(stderr, " modversion is " 254 "unchanged\n"); 255 } 256 sym->is_declared = 1; 257 return sym; 258 } else if (!sym->is_declared) { 259 if (sym->is_override && flag_preserve) { 260 print_location(); 261 fprintf(stderr, "ignoring "); 262 print_type_name(type, name); 263 fprintf(stderr, " modversion change\n"); 264 sym->is_declared = 1; 265 return sym; 266 } else { 267 status = is_unknown_symbol(sym) ? 268 STATUS_DEFINED : STATUS_MODIFIED; 269 } 270 } else { 271 error_with_pos("redefinition of %s", name); 272 return sym; 273 } 274 break; 275 } 276 } 277 278 if (sym) { 279 struct symbol **psym; 280 281 for (psym = &symtab[h]; *psym; psym = &(*psym)->hash_next) { 282 if (*psym == sym) { 283 *psym = sym->hash_next; 284 break; 285 } 286 } 287 --nsyms; 288 } 289 290 sym = xmalloc(sizeof(*sym)); 291 sym->name = name; 292 sym->type = type; 293 sym->defn = defn; 294 sym->expansion_trail = NULL; 295 sym->visited = NULL; 296 sym->is_extern = is_extern; 297 298 sym->hash_next = symtab[h]; 299 symtab[h] = sym; 300 301 sym->is_declared = !is_reference; 302 sym->status = status; 303 sym->is_override = 0; 304 305 if (flag_debug) { 306 if (symbol_types[type].name) 307 fprintf(debugfile, "Defn for %s %s == <", 308 symbol_types[type].name, name); 309 else 310 fprintf(debugfile, "Defn for type%d %s == <", 311 type, name); 312 if (is_extern) 313 fputs("extern ", debugfile); 314 print_list(debugfile, defn); 315 fputs(">\n", debugfile); 316 } 317 318 ++nsyms; 319 return sym; 320 } 321 322 struct symbol *add_symbol(const char *name, enum symbol_type type, 323 struct string_list *defn, int is_extern) 324 { 325 return __add_symbol(name, type, defn, is_extern, 0); 326 } 327 328 static struct symbol *add_reference_symbol(const char *name, enum symbol_type type, 329 struct string_list *defn, int is_extern) 330 { 331 return __add_symbol(name, type, defn, is_extern, 1); 332 } 333 334 /*----------------------------------------------------------------------*/ 335 336 void free_node(struct string_list *node) 337 { 338 free(node->string); 339 free(node); 340 } 341 342 void free_list(struct string_list *s, struct string_list *e) 343 { 344 while (s != e) { 345 struct string_list *next = s->next; 346 free_node(s); 347 s = next; 348 } 349 } 350 351 static struct string_list *mk_node(const char *string) 352 { 353 struct string_list *newnode; 354 355 newnode = xmalloc(sizeof(*newnode)); 356 newnode->string = xstrdup(string); 357 newnode->tag = SYM_NORMAL; 358 newnode->next = NULL; 359 360 return newnode; 361 } 362 363 static struct string_list *concat_list(struct string_list *start, ...) 364 { 365 va_list ap; 366 struct string_list *n, *n2; 367 368 if (!start) 369 return NULL; 370 for (va_start(ap, start); (n = va_arg(ap, struct string_list *));) { 371 for (n2 = n; n2->next; n2 = n2->next) 372 ; 373 n2->next = start; 374 start = n; 375 } 376 va_end(ap); 377 return start; 378 } 379 380 struct string_list *copy_node(struct string_list *node) 381 { 382 struct string_list *newnode; 383 384 newnode = xmalloc(sizeof(*newnode)); 385 newnode->string = xstrdup(node->string); 386 newnode->tag = node->tag; 387 388 return newnode; 389 } 390 391 struct string_list *copy_list_range(struct string_list *start, 392 struct string_list *end) 393 { 394 struct string_list *res, *n; 395 396 if (start == end) 397 return NULL; 398 n = res = copy_node(start); 399 for (start = start->next; start != end; start = start->next) { 400 n->next = copy_node(start); 401 n = n->next; 402 } 403 n->next = NULL; 404 return res; 405 } 406 407 static int equal_list(struct string_list *a, struct string_list *b) 408 { 409 while (a && b) { 410 if (a->tag != b->tag || strcmp(a->string, b->string)) 411 return 0; 412 a = a->next; 413 b = b->next; 414 } 415 416 return !a && !b; 417 } 418 419 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) 420 421 static struct string_list *read_node(FILE *f) 422 { 423 char buffer[256]; 424 struct string_list node = { 425 .string = buffer, 426 .tag = SYM_NORMAL }; 427 int c; 428 429 while ((c = fgetc(f)) != EOF) { 430 if (c == ' ') { 431 if (node.string == buffer) 432 continue; 433 break; 434 } else if (c == '\n') { 435 if (node.string == buffer) 436 return NULL; 437 ungetc(c, f); 438 break; 439 } 440 if (node.string >= buffer + sizeof(buffer) - 1) { 441 fprintf(stderr, "Token too long\n"); 442 exit(1); 443 } 444 *node.string++ = c; 445 } 446 if (node.string == buffer) 447 return NULL; 448 *node.string = 0; 449 node.string = buffer; 450 451 if (node.string[1] == '#') { 452 size_t n; 453 454 for (n = 0; n < ARRAY_SIZE(symbol_types); n++) { 455 if (node.string[0] == symbol_types[n].n) { 456 node.tag = n; 457 node.string += 2; 458 return copy_node(&node); 459 } 460 } 461 fprintf(stderr, "Unknown type %c\n", node.string[0]); 462 exit(1); 463 } 464 return copy_node(&node); 465 } 466 467 static void read_reference(FILE *f) 468 { 469 while (!feof(f)) { 470 struct string_list *defn = NULL; 471 struct string_list *sym, *def; 472 int is_extern = 0, is_override = 0; 473 struct symbol *subsym; 474 475 sym = read_node(f); 476 if (sym && sym->tag == SYM_NORMAL && 477 !strcmp(sym->string, "override")) { 478 is_override = 1; 479 free_node(sym); 480 sym = read_node(f); 481 } 482 if (!sym) 483 continue; 484 def = read_node(f); 485 if (def && def->tag == SYM_NORMAL && 486 !strcmp(def->string, "extern")) { 487 is_extern = 1; 488 free_node(def); 489 def = read_node(f); 490 } 491 while (def) { 492 def->next = defn; 493 defn = def; 494 def = read_node(f); 495 } 496 subsym = add_reference_symbol(xstrdup(sym->string), sym->tag, 497 defn, is_extern); 498 subsym->is_override = is_override; 499 free_node(sym); 500 } 501 } 502 503 static void print_node(FILE * f, struct string_list *list) 504 { 505 if (symbol_types[list->tag].n) { 506 putc(symbol_types[list->tag].n, f); 507 putc('#', f); 508 } 509 fputs(list->string, f); 510 } 511 512 static void print_list(FILE * f, struct string_list *list) 513 { 514 struct string_list **e, **b; 515 struct string_list *tmp, **tmp2; 516 int elem = 1; 517 518 if (list == NULL) { 519 fputs("(nil)", f); 520 return; 521 } 522 523 tmp = list; 524 while ((tmp = tmp->next) != NULL) 525 elem++; 526 527 b = alloca(elem * sizeof(*e)); 528 e = b + elem; 529 tmp2 = e - 1; 530 531 (*tmp2--) = list; 532 while ((list = list->next) != NULL) 533 *(tmp2--) = list; 534 535 while (b != e) { 536 print_node(f, *b++); 537 putc(' ', f); 538 } 539 } 540 541 static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc) 542 { 543 struct string_list *list = sym->defn; 544 struct string_list **e, **b; 545 struct string_list *tmp, **tmp2; 546 int elem = 1; 547 548 if (!list) 549 return crc; 550 551 tmp = list; 552 while ((tmp = tmp->next) != NULL) 553 elem++; 554 555 b = alloca(elem * sizeof(*e)); 556 e = b + elem; 557 tmp2 = e - 1; 558 559 *(tmp2--) = list; 560 while ((list = list->next) != NULL) 561 *(tmp2--) = list; 562 563 while (b != e) { 564 struct string_list *cur; 565 struct symbol *subsym; 566 567 cur = *(b++); 568 switch (cur->tag) { 569 case SYM_NORMAL: 570 if (flag_dump_defs) 571 fprintf(debugfile, "%s ", cur->string); 572 crc = partial_crc32(cur->string, crc); 573 crc = partial_crc32_one(' ', crc); 574 break; 575 576 case SYM_ENUM_CONST: 577 case SYM_TYPEDEF: 578 subsym = find_symbol(cur->string, cur->tag, 0); 579 /* FIXME: Bad reference files can segfault here. */ 580 if (subsym->expansion_trail) { 581 if (flag_dump_defs) 582 fprintf(debugfile, "%s ", cur->string); 583 crc = partial_crc32(cur->string, crc); 584 crc = partial_crc32_one(' ', crc); 585 } else { 586 subsym->expansion_trail = expansion_trail; 587 expansion_trail = subsym; 588 crc = expand_and_crc_sym(subsym, crc); 589 } 590 break; 591 592 case SYM_STRUCT: 593 case SYM_UNION: 594 case SYM_ENUM: 595 subsym = find_symbol(cur->string, cur->tag, 0); 596 if (!subsym) { 597 struct string_list *n; 598 599 error_with_pos("expand undefined %s %s", 600 symbol_types[cur->tag].name, 601 cur->string); 602 n = concat_list(mk_node 603 (symbol_types[cur->tag].name), 604 mk_node(cur->string), 605 mk_node("{"), 606 mk_node("UNKNOWN"), 607 mk_node("}"), NULL); 608 subsym = 609 add_symbol(cur->string, cur->tag, n, 0); 610 } 611 if (subsym->expansion_trail) { 612 if (flag_dump_defs) { 613 fprintf(debugfile, "%s %s ", 614 symbol_types[cur->tag].name, 615 cur->string); 616 } 617 618 crc = partial_crc32(symbol_types[cur->tag].name, 619 crc); 620 crc = partial_crc32_one(' ', crc); 621 crc = partial_crc32(cur->string, crc); 622 crc = partial_crc32_one(' ', crc); 623 } else { 624 subsym->expansion_trail = expansion_trail; 625 expansion_trail = subsym; 626 crc = expand_and_crc_sym(subsym, crc); 627 } 628 break; 629 } 630 } 631 632 { 633 static struct symbol **end = &visited_symbols; 634 635 if (!sym->visited) { 636 *end = sym; 637 end = &sym->visited; 638 sym->visited = (struct symbol *)-1L; 639 } 640 } 641 642 return crc; 643 } 644 645 void export_symbol(const char *name) 646 { 647 struct symbol *sym; 648 649 sym = find_symbol(name, SYM_NORMAL, 0); 650 if (!sym) 651 error_with_pos("export undefined symbol %s", name); 652 else { 653 unsigned long crc; 654 int has_changed = 0; 655 656 if (flag_dump_defs) 657 fprintf(debugfile, "Export %s == <", name); 658 659 expansion_trail = (struct symbol *)-1L; 660 661 sym->expansion_trail = expansion_trail; 662 expansion_trail = sym; 663 crc = expand_and_crc_sym(sym, 0xffffffff) ^ 0xffffffff; 664 665 sym = expansion_trail; 666 while (sym != (struct symbol *)-1L) { 667 struct symbol *n = sym->expansion_trail; 668 669 if (sym->status != STATUS_UNCHANGED) { 670 if (!has_changed) { 671 print_location(); 672 fprintf(stderr, "%s: %s: modversion " 673 "changed because of changes " 674 "in ", flag_preserve ? "error" : 675 "warning", name); 676 } else 677 fprintf(stderr, ", "); 678 print_type_name(sym->type, sym->name); 679 if (sym->status == STATUS_DEFINED) 680 fprintf(stderr, " (became defined)"); 681 has_changed = 1; 682 if (flag_preserve) 683 errors++; 684 } 685 sym->expansion_trail = 0; 686 sym = n; 687 } 688 if (has_changed) 689 fprintf(stderr, "\n"); 690 691 if (flag_dump_defs) 692 fputs(">\n", debugfile); 693 694 /* Used as a linker script. */ 695 printf("%s__crc_%s = 0x%08lx ;\n", mod_prefix, name, crc); 696 } 697 } 698 699 /*----------------------------------------------------------------------*/ 700 701 static void print_location(void) 702 { 703 fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>", cur_line); 704 } 705 706 static void print_type_name(enum symbol_type type, const char *name) 707 { 708 if (symbol_types[type].name) 709 fprintf(stderr, "%s %s", symbol_types[type].name, name); 710 else 711 fprintf(stderr, "%s", name); 712 } 713 714 void error_with_pos(const char *fmt, ...) 715 { 716 va_list args; 717 718 if (flag_warnings) { 719 print_location(); 720 721 va_start(args, fmt); 722 vfprintf(stderr, fmt, args); 723 va_end(args); 724 putc('\n', stderr); 725 726 errors++; 727 } 728 } 729 730 static void genksyms_usage(void) 731 { 732 fputs("Usage:\n" "genksyms [-adDTwqhV] > /path/to/.tmp_obj.ver\n" "\n" 733 #ifdef __GNU_LIBRARY__ 734 " -a, --arch Select architecture\n" 735 " -d, --debug Increment the debug level (repeatable)\n" 736 " -D, --dump Dump expanded symbol defs (for debugging only)\n" 737 " -r, --reference file Read reference symbols from a file\n" 738 " -T, --dump-types file Dump expanded types into file\n" 739 " -p, --preserve Preserve reference modversions or fail\n" 740 " -w, --warnings Enable warnings\n" 741 " -q, --quiet Disable warnings (default)\n" 742 " -h, --help Print this message\n" 743 " -V, --version Print the release version\n" 744 #else /* __GNU_LIBRARY__ */ 745 " -a Select architecture\n" 746 " -d Increment the debug level (repeatable)\n" 747 " -D Dump expanded symbol defs (for debugging only)\n" 748 " -r file Read reference symbols from a file\n" 749 " -T file Dump expanded types into file\n" 750 " -p Preserve reference modversions or fail\n" 751 " -w Enable warnings\n" 752 " -q Disable warnings (default)\n" 753 " -h Print this message\n" 754 " -V Print the release version\n" 755 #endif /* __GNU_LIBRARY__ */ 756 , stderr); 757 } 758 759 int main(int argc, char **argv) 760 { 761 FILE *dumpfile = NULL, *ref_file = NULL; 762 int o; 763 764 #ifdef __GNU_LIBRARY__ 765 struct option long_opts[] = { 766 {"arch", 1, 0, 'a'}, 767 {"debug", 0, 0, 'd'}, 768 {"warnings", 0, 0, 'w'}, 769 {"quiet", 0, 0, 'q'}, 770 {"dump", 0, 0, 'D'}, 771 {"reference", 1, 0, 'r'}, 772 {"dump-types", 1, 0, 'T'}, 773 {"preserve", 0, 0, 'p'}, 774 {"version", 0, 0, 'V'}, 775 {"help", 0, 0, 'h'}, 776 {0, 0, 0, 0} 777 }; 778 779 while ((o = getopt_long(argc, argv, "a:dwqVDr:T:ph", 780 &long_opts[0], NULL)) != EOF) 781 #else /* __GNU_LIBRARY__ */ 782 while ((o = getopt(argc, argv, "a:dwqVDr:T:ph")) != EOF) 783 #endif /* __GNU_LIBRARY__ */ 784 switch (o) { 785 case 'a': 786 arch = optarg; 787 break; 788 case 'd': 789 flag_debug++; 790 break; 791 case 'w': 792 flag_warnings = 1; 793 break; 794 case 'q': 795 flag_warnings = 0; 796 break; 797 case 'V': 798 fputs("genksyms version 2.5.60\n", stderr); 799 break; 800 case 'D': 801 flag_dump_defs = 1; 802 break; 803 case 'r': 804 flag_reference = 1; 805 ref_file = fopen(optarg, "r"); 806 if (!ref_file) { 807 perror(optarg); 808 return 1; 809 } 810 break; 811 case 'T': 812 flag_dump_types = 1; 813 dumpfile = fopen(optarg, "w"); 814 if (!dumpfile) { 815 perror(optarg); 816 return 1; 817 } 818 break; 819 case 'p': 820 flag_preserve = 1; 821 break; 822 case 'h': 823 genksyms_usage(); 824 return 0; 825 default: 826 genksyms_usage(); 827 return 1; 828 } 829 if ((strcmp(arch, "h8300") == 0) || (strcmp(arch, "blackfin") == 0)) 830 mod_prefix = "_"; 831 { 832 extern int yydebug; 833 extern int yy_flex_debug; 834 835 yydebug = (flag_debug > 1); 836 yy_flex_debug = (flag_debug > 2); 837 838 debugfile = stderr; 839 /* setlinebuf(debugfile); */ 840 } 841 842 if (flag_reference) { 843 read_reference(ref_file); 844 fclose(ref_file); 845 } 846 847 yyparse(); 848 849 if (flag_dump_types && visited_symbols) { 850 while (visited_symbols != (struct symbol *)-1L) { 851 struct symbol *sym = visited_symbols; 852 853 if (sym->is_override) 854 fputs("override ", dumpfile); 855 if (symbol_types[sym->type].n) { 856 putc(symbol_types[sym->type].n, dumpfile); 857 putc('#', dumpfile); 858 } 859 fputs(sym->name, dumpfile); 860 putc(' ', dumpfile); 861 if (sym->is_extern) 862 fputs("extern ", dumpfile); 863 print_list(dumpfile, sym->defn); 864 putc('\n', dumpfile); 865 866 visited_symbols = sym->visited; 867 sym->visited = NULL; 868 } 869 } 870 871 if (flag_debug) { 872 fprintf(debugfile, "Hash table occupancy %d/%d = %g\n", 873 nsyms, HASH_BUCKETS, 874 (double)nsyms / (double)HASH_BUCKETS); 875 } 876 877 return errors != 0; 878 } 879