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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
33
34#include "genksyms.h"
35
36
37#define HASH_BUCKETS 4096
38
39static struct symbol *symtab[HASH_BUCKETS];
40static FILE *debugfile;
41
42int cur_line = 1;
43char *cur_filename, *source_file;
44int in_source_file;
45
46static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types,
47 flag_preserve, flag_warnings, flag_rel_crcs;
48static const char *mod_prefix = "";
49
50static int errors;
51static int nsyms;
52
53static struct symbol *expansion_trail;
54static struct symbol *visited_symbols;
55
56static const struct {
57 int n;
58 const char *name;
59} symbol_types[] = {
60 [SYM_NORMAL] = { 0, NULL},
61 [SYM_TYPEDEF] = {'t', "typedef"},
62 [SYM_ENUM] = {'e', "enum"},
63 [SYM_STRUCT] = {'s', "struct"},
64 [SYM_UNION] = {'u', "union"},
65 [SYM_ENUM_CONST] = {'E', "enum constant"},
66};
67
68static int equal_list(struct string_list *a, struct string_list *b);
69static void print_list(FILE * f, struct string_list *list);
70static struct string_list *concat_list(struct string_list *start, ...);
71static struct string_list *mk_node(const char *string);
72static void print_location(void);
73static void print_type_name(enum symbol_type type, const char *name);
74
75
76
77static const unsigned int crctab32[] = {
78 0x00000000U, 0x77073096U, 0xee0e612cU, 0x990951baU, 0x076dc419U,
79 0x706af48fU, 0xe963a535U, 0x9e6495a3U, 0x0edb8832U, 0x79dcb8a4U,
80 0xe0d5e91eU, 0x97d2d988U, 0x09b64c2bU, 0x7eb17cbdU, 0xe7b82d07U,
81 0x90bf1d91U, 0x1db71064U, 0x6ab020f2U, 0xf3b97148U, 0x84be41deU,
82 0x1adad47dU, 0x6ddde4ebU, 0xf4d4b551U, 0x83d385c7U, 0x136c9856U,
83 0x646ba8c0U, 0xfd62f97aU, 0x8a65c9ecU, 0x14015c4fU, 0x63066cd9U,
84 0xfa0f3d63U, 0x8d080df5U, 0x3b6e20c8U, 0x4c69105eU, 0xd56041e4U,
85 0xa2677172U, 0x3c03e4d1U, 0x4b04d447U, 0xd20d85fdU, 0xa50ab56bU,
86 0x35b5a8faU, 0x42b2986cU, 0xdbbbc9d6U, 0xacbcf940U, 0x32d86ce3U,
87 0x45df5c75U, 0xdcd60dcfU, 0xabd13d59U, 0x26d930acU, 0x51de003aU,
88 0xc8d75180U, 0xbfd06116U, 0x21b4f4b5U, 0x56b3c423U, 0xcfba9599U,
89 0xb8bda50fU, 0x2802b89eU, 0x5f058808U, 0xc60cd9b2U, 0xb10be924U,
90 0x2f6f7c87U, 0x58684c11U, 0xc1611dabU, 0xb6662d3dU, 0x76dc4190U,
91 0x01db7106U, 0x98d220bcU, 0xefd5102aU, 0x71b18589U, 0x06b6b51fU,
92 0x9fbfe4a5U, 0xe8b8d433U, 0x7807c9a2U, 0x0f00f934U, 0x9609a88eU,
93 0xe10e9818U, 0x7f6a0dbbU, 0x086d3d2dU, 0x91646c97U, 0xe6635c01U,
94 0x6b6b51f4U, 0x1c6c6162U, 0x856530d8U, 0xf262004eU, 0x6c0695edU,
95 0x1b01a57bU, 0x8208f4c1U, 0xf50fc457U, 0x65b0d9c6U, 0x12b7e950U,
96 0x8bbeb8eaU, 0xfcb9887cU, 0x62dd1ddfU, 0x15da2d49U, 0x8cd37cf3U,
97 0xfbd44c65U, 0x4db26158U, 0x3ab551ceU, 0xa3bc0074U, 0xd4bb30e2U,
98 0x4adfa541U, 0x3dd895d7U, 0xa4d1c46dU, 0xd3d6f4fbU, 0x4369e96aU,
99 0x346ed9fcU, 0xad678846U, 0xda60b8d0U, 0x44042d73U, 0x33031de5U,
100 0xaa0a4c5fU, 0xdd0d7cc9U, 0x5005713cU, 0x270241aaU, 0xbe0b1010U,
101 0xc90c2086U, 0x5768b525U, 0x206f85b3U, 0xb966d409U, 0xce61e49fU,
102 0x5edef90eU, 0x29d9c998U, 0xb0d09822U, 0xc7d7a8b4U, 0x59b33d17U,
103 0x2eb40d81U, 0xb7bd5c3bU, 0xc0ba6cadU, 0xedb88320U, 0x9abfb3b6U,
104 0x03b6e20cU, 0x74b1d29aU, 0xead54739U, 0x9dd277afU, 0x04db2615U,
105 0x73dc1683U, 0xe3630b12U, 0x94643b84U, 0x0d6d6a3eU, 0x7a6a5aa8U,
106 0xe40ecf0bU, 0x9309ff9dU, 0x0a00ae27U, 0x7d079eb1U, 0xf00f9344U,
107 0x8708a3d2U, 0x1e01f268U, 0x6906c2feU, 0xf762575dU, 0x806567cbU,
108 0x196c3671U, 0x6e6b06e7U, 0xfed41b76U, 0x89d32be0U, 0x10da7a5aU,
109 0x67dd4accU, 0xf9b9df6fU, 0x8ebeeff9U, 0x17b7be43U, 0x60b08ed5U,
110 0xd6d6a3e8U, 0xa1d1937eU, 0x38d8c2c4U, 0x4fdff252U, 0xd1bb67f1U,
111 0xa6bc5767U, 0x3fb506ddU, 0x48b2364bU, 0xd80d2bdaU, 0xaf0a1b4cU,
112 0x36034af6U, 0x41047a60U, 0xdf60efc3U, 0xa867df55U, 0x316e8eefU,
113 0x4669be79U, 0xcb61b38cU, 0xbc66831aU, 0x256fd2a0U, 0x5268e236U,
114 0xcc0c7795U, 0xbb0b4703U, 0x220216b9U, 0x5505262fU, 0xc5ba3bbeU,
115 0xb2bd0b28U, 0x2bb45a92U, 0x5cb36a04U, 0xc2d7ffa7U, 0xb5d0cf31U,
116 0x2cd99e8bU, 0x5bdeae1dU, 0x9b64c2b0U, 0xec63f226U, 0x756aa39cU,
117 0x026d930aU, 0x9c0906a9U, 0xeb0e363fU, 0x72076785U, 0x05005713U,
118 0x95bf4a82U, 0xe2b87a14U, 0x7bb12baeU, 0x0cb61b38U, 0x92d28e9bU,
119 0xe5d5be0dU, 0x7cdcefb7U, 0x0bdbdf21U, 0x86d3d2d4U, 0xf1d4e242U,
120 0x68ddb3f8U, 0x1fda836eU, 0x81be16cdU, 0xf6b9265bU, 0x6fb077e1U,
121 0x18b74777U, 0x88085ae6U, 0xff0f6a70U, 0x66063bcaU, 0x11010b5cU,
122 0x8f659effU, 0xf862ae69U, 0x616bffd3U, 0x166ccf45U, 0xa00ae278U,
123 0xd70dd2eeU, 0x4e048354U, 0x3903b3c2U, 0xa7672661U, 0xd06016f7U,
124 0x4969474dU, 0x3e6e77dbU, 0xaed16a4aU, 0xd9d65adcU, 0x40df0b66U,
125 0x37d83bf0U, 0xa9bcae53U, 0xdebb9ec5U, 0x47b2cf7fU, 0x30b5ffe9U,
126 0xbdbdf21cU, 0xcabac28aU, 0x53b39330U, 0x24b4a3a6U, 0xbad03605U,
127 0xcdd70693U, 0x54de5729U, 0x23d967bfU, 0xb3667a2eU, 0xc4614ab8U,
128 0x5d681b02U, 0x2a6f2b94U, 0xb40bbe37U, 0xc30c8ea1U, 0x5a05df1bU,
129 0x2d02ef8dU
130};
131
132static unsigned long partial_crc32_one(unsigned char c, unsigned long crc)
133{
134 return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8);
135}
136
137static unsigned long partial_crc32(const char *s, unsigned long crc)
138{
139 while (*s)
140 crc = partial_crc32_one(*s++, crc);
141 return crc;
142}
143
144static unsigned long crc32(const char *s)
145{
146 return partial_crc32(s, 0xffffffff) ^ 0xffffffff;
147}
148
149
150
151static enum symbol_type map_to_ns(enum symbol_type t)
152{
153 switch (t) {
154 case SYM_ENUM_CONST:
155 case SYM_NORMAL:
156 case SYM_TYPEDEF:
157 return SYM_NORMAL;
158 case SYM_ENUM:
159 case SYM_STRUCT:
160 case SYM_UNION:
161 return SYM_STRUCT;
162 }
163 return t;
164}
165
166struct symbol *find_symbol(const char *name, enum symbol_type ns, int exact)
167{
168 unsigned long h = crc32(name) % HASH_BUCKETS;
169 struct symbol *sym;
170
171 for (sym = symtab[h]; sym; sym = sym->hash_next)
172 if (map_to_ns(sym->type) == map_to_ns(ns) &&
173 strcmp(name, sym->name) == 0 &&
174 sym->is_declared)
175 break;
176
177 if (exact && sym && sym->type != ns)
178 return NULL;
179 return sym;
180}
181
182static int is_unknown_symbol(struct symbol *sym)
183{
184 struct string_list *defn;
185
186 return ((sym->type == SYM_STRUCT ||
187 sym->type == SYM_UNION ||
188 sym->type == SYM_ENUM) &&
189 (defn = sym->defn) && defn->tag == SYM_NORMAL &&
190 strcmp(defn->string, "}") == 0 &&
191 (defn = defn->next) && defn->tag == SYM_NORMAL &&
192 strcmp(defn->string, "UNKNOWN") == 0 &&
193 (defn = defn->next) && defn->tag == SYM_NORMAL &&
194 strcmp(defn->string, "{") == 0);
195}
196
197static struct symbol *__add_symbol(const char *name, enum symbol_type type,
198 struct string_list *defn, int is_extern,
199 int is_reference)
200{
201 unsigned long h;
202 struct symbol *sym;
203 enum symbol_status status = STATUS_UNCHANGED;
204
205
206
207
208 static int enum_counter;
209 static struct string_list *last_enum_expr;
210
211 if (type == SYM_ENUM_CONST) {
212 if (defn) {
213 free_list(last_enum_expr, NULL);
214 last_enum_expr = copy_list_range(defn, NULL);
215 enum_counter = 1;
216 } else {
217 struct string_list *expr;
218 char buf[20];
219
220 snprintf(buf, sizeof(buf), "%d", enum_counter++);
221 if (last_enum_expr) {
222 expr = copy_list_range(last_enum_expr, NULL);
223 defn = concat_list(mk_node("("),
224 expr,
225 mk_node(")"),
226 mk_node("+"),
227 mk_node(buf), NULL);
228 } else {
229 defn = mk_node(buf);
230 }
231 }
232 } else if (type == SYM_ENUM) {
233 free_list(last_enum_expr, NULL);
234 last_enum_expr = NULL;
235 enum_counter = 0;
236 if (!name)
237
238 return NULL;
239 }
240
241 h = crc32(name) % HASH_BUCKETS;
242 for (sym = symtab[h]; sym; sym = sym->hash_next) {
243 if (map_to_ns(sym->type) == map_to_ns(type) &&
244 strcmp(name, sym->name) == 0) {
245 if (is_reference)
246 ;
247 else if (sym->type == type &&
248 equal_list(sym->defn, defn)) {
249 if (!sym->is_declared && sym->is_override) {
250 print_location();
251 print_type_name(type, name);
252 fprintf(stderr, " modversion is "
253 "unchanged\n");
254 }
255 sym->is_declared = 1;
256 return sym;
257 } else if (!sym->is_declared) {
258 if (sym->is_override && flag_preserve) {
259 print_location();
260 fprintf(stderr, "ignoring ");
261 print_type_name(type, name);
262 fprintf(stderr, " modversion change\n");
263 sym->is_declared = 1;
264 return sym;
265 } else {
266 status = is_unknown_symbol(sym) ?
267 STATUS_DEFINED : STATUS_MODIFIED;
268 }
269 } else {
270 error_with_pos("redefinition of %s", name);
271 return sym;
272 }
273 break;
274 }
275 }
276
277 if (sym) {
278 struct symbol **psym;
279
280 for (psym = &symtab[h]; *psym; psym = &(*psym)->hash_next) {
281 if (*psym == sym) {
282 *psym = sym->hash_next;
283 break;
284 }
285 }
286 --nsyms;
287 }
288
289 sym = xmalloc(sizeof(*sym));
290 sym->name = name;
291 sym->type = type;
292 sym->defn = defn;
293 sym->expansion_trail = NULL;
294 sym->visited = NULL;
295 sym->is_extern = is_extern;
296
297 sym->hash_next = symtab[h];
298 symtab[h] = sym;
299
300 sym->is_declared = !is_reference;
301 sym->status = status;
302 sym->is_override = 0;
303
304 if (flag_debug) {
305 if (symbol_types[type].name)
306 fprintf(debugfile, "Defn for %s %s == <",
307 symbol_types[type].name, name);
308 else
309 fprintf(debugfile, "Defn for type%d %s == <",
310 type, name);
311 if (is_extern)
312 fputs("extern ", debugfile);
313 print_list(debugfile, defn);
314 fputs(">\n", debugfile);
315 }
316
317 ++nsyms;
318 return sym;
319}
320
321struct symbol *add_symbol(const char *name, enum symbol_type type,
322 struct string_list *defn, int is_extern)
323{
324 return __add_symbol(name, type, defn, is_extern, 0);
325}
326
327static struct symbol *add_reference_symbol(const char *name, enum symbol_type type,
328 struct string_list *defn, int is_extern)
329{
330 return __add_symbol(name, type, defn, is_extern, 1);
331}
332
333
334
335void free_node(struct string_list *node)
336{
337 free(node->string);
338 free(node);
339}
340
341void free_list(struct string_list *s, struct string_list *e)
342{
343 while (s != e) {
344 struct string_list *next = s->next;
345 free_node(s);
346 s = next;
347 }
348}
349
350static struct string_list *mk_node(const char *string)
351{
352 struct string_list *newnode;
353
354 newnode = xmalloc(sizeof(*newnode));
355 newnode->string = xstrdup(string);
356 newnode->tag = SYM_NORMAL;
357 newnode->next = NULL;
358
359 return newnode;
360}
361
362static struct string_list *concat_list(struct string_list *start, ...)
363{
364 va_list ap;
365 struct string_list *n, *n2;
366
367 if (!start)
368 return NULL;
369 for (va_start(ap, start); (n = va_arg(ap, struct string_list *));) {
370 for (n2 = n; n2->next; n2 = n2->next)
371 ;
372 n2->next = start;
373 start = n;
374 }
375 va_end(ap);
376 return start;
377}
378
379struct string_list *copy_node(struct string_list *node)
380{
381 struct string_list *newnode;
382
383 newnode = xmalloc(sizeof(*newnode));
384 newnode->string = xstrdup(node->string);
385 newnode->tag = node->tag;
386
387 return newnode;
388}
389
390struct string_list *copy_list_range(struct string_list *start,
391 struct string_list *end)
392{
393 struct string_list *res, *n;
394
395 if (start == end)
396 return NULL;
397 n = res = copy_node(start);
398 for (start = start->next; start != end; start = start->next) {
399 n->next = copy_node(start);
400 n = n->next;
401 }
402 n->next = NULL;
403 return res;
404}
405
406static int equal_list(struct string_list *a, struct string_list *b)
407{
408 while (a && b) {
409 if (a->tag != b->tag || strcmp(a->string, b->string))
410 return 0;
411 a = a->next;
412 b = b->next;
413 }
414
415 return !a && !b;
416}
417
418#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
419
420static struct string_list *read_node(FILE *f)
421{
422 char buffer[256];
423 struct string_list node = {
424 .string = buffer,
425 .tag = SYM_NORMAL };
426 int c, in_string = 0;
427
428 while ((c = fgetc(f)) != EOF) {
429 if (!in_string && c == ' ') {
430 if (node.string == buffer)
431 continue;
432 break;
433 } else if (c == '"') {
434 in_string = !in_string;
435 } else if (c == '\n') {
436 if (node.string == buffer)
437 return NULL;
438 ungetc(c, f);
439 break;
440 }
441 if (node.string >= buffer + sizeof(buffer) - 1) {
442 fprintf(stderr, "Token too long\n");
443 exit(1);
444 }
445 *node.string++ = c;
446 }
447 if (node.string == buffer)
448 return NULL;
449 *node.string = 0;
450 node.string = buffer;
451
452 if (node.string[1] == '#') {
453 size_t n;
454
455 for (n = 0; n < ARRAY_SIZE(symbol_types); n++) {
456 if (node.string[0] == symbol_types[n].n) {
457 node.tag = n;
458 node.string += 2;
459 return copy_node(&node);
460 }
461 }
462 fprintf(stderr, "Unknown type %c\n", node.string[0]);
463 exit(1);
464 }
465 return copy_node(&node);
466}
467
468static void read_reference(FILE *f)
469{
470 while (!feof(f)) {
471 struct string_list *defn = NULL;
472 struct string_list *sym, *def;
473 int is_extern = 0, is_override = 0;
474 struct symbol *subsym;
475
476 sym = read_node(f);
477 if (sym && sym->tag == SYM_NORMAL &&
478 !strcmp(sym->string, "override")) {
479 is_override = 1;
480 free_node(sym);
481 sym = read_node(f);
482 }
483 if (!sym)
484 continue;
485 def = read_node(f);
486 if (def && def->tag == SYM_NORMAL &&
487 !strcmp(def->string, "extern")) {
488 is_extern = 1;
489 free_node(def);
490 def = read_node(f);
491 }
492 while (def) {
493 def->next = defn;
494 defn = def;
495 def = read_node(f);
496 }
497 subsym = add_reference_symbol(xstrdup(sym->string), sym->tag,
498 defn, is_extern);
499 subsym->is_override = is_override;
500 free_node(sym);
501 }
502}
503
504static void print_node(FILE * f, struct string_list *list)
505{
506 if (symbol_types[list->tag].n) {
507 putc(symbol_types[list->tag].n, f);
508 putc('#', f);
509 }
510 fputs(list->string, f);
511}
512
513static void print_list(FILE * f, struct string_list *list)
514{
515 struct string_list **e, **b;
516 struct string_list *tmp, **tmp2;
517 int elem = 1;
518
519 if (list == NULL) {
520 fputs("(nil)", f);
521 return;
522 }
523
524 tmp = list;
525 while ((tmp = tmp->next) != NULL)
526 elem++;
527
528 b = alloca(elem * sizeof(*e));
529 e = b + elem;
530 tmp2 = e - 1;
531
532 (*tmp2--) = list;
533 while ((list = list->next) != NULL)
534 *(tmp2--) = list;
535
536 while (b != e) {
537 print_node(f, *b++);
538 putc(' ', f);
539 }
540}
541
542static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc)
543{
544 struct string_list *list = sym->defn;
545 struct string_list **e, **b;
546 struct string_list *tmp, **tmp2;
547 int elem = 1;
548
549 if (!list)
550 return crc;
551
552 tmp = list;
553 while ((tmp = tmp->next) != NULL)
554 elem++;
555
556 b = alloca(elem * sizeof(*e));
557 e = b + elem;
558 tmp2 = e - 1;
559
560 *(tmp2--) = list;
561 while ((list = list->next) != NULL)
562 *(tmp2--) = list;
563
564 while (b != e) {
565 struct string_list *cur;
566 struct symbol *subsym;
567
568 cur = *(b++);
569 switch (cur->tag) {
570 case SYM_NORMAL:
571 if (flag_dump_defs)
572 fprintf(debugfile, "%s ", cur->string);
573 crc = partial_crc32(cur->string, crc);
574 crc = partial_crc32_one(' ', crc);
575 break;
576
577 case SYM_ENUM_CONST:
578 case SYM_TYPEDEF:
579 subsym = find_symbol(cur->string, cur->tag, 0);
580
581 if (subsym->expansion_trail) {
582 if (flag_dump_defs)
583 fprintf(debugfile, "%s ", cur->string);
584 crc = partial_crc32(cur->string, crc);
585 crc = partial_crc32_one(' ', crc);
586 } else {
587 subsym->expansion_trail = expansion_trail;
588 expansion_trail = subsym;
589 crc = expand_and_crc_sym(subsym, crc);
590 }
591 break;
592
593 case SYM_STRUCT:
594 case SYM_UNION:
595 case SYM_ENUM:
596 subsym = find_symbol(cur->string, cur->tag, 0);
597 if (!subsym) {
598 struct string_list *n;
599
600 error_with_pos("expand undefined %s %s",
601 symbol_types[cur->tag].name,
602 cur->string);
603 n = concat_list(mk_node
604 (symbol_types[cur->tag].name),
605 mk_node(cur->string),
606 mk_node("{"),
607 mk_node("UNKNOWN"),
608 mk_node("}"), NULL);
609 subsym =
610 add_symbol(cur->string, cur->tag, n, 0);
611 }
612 if (subsym->expansion_trail) {
613 if (flag_dump_defs) {
614 fprintf(debugfile, "%s %s ",
615 symbol_types[cur->tag].name,
616 cur->string);
617 }
618
619 crc = partial_crc32(symbol_types[cur->tag].name,
620 crc);
621 crc = partial_crc32_one(' ', crc);
622 crc = partial_crc32(cur->string, crc);
623 crc = partial_crc32_one(' ', crc);
624 } else {
625 subsym->expansion_trail = expansion_trail;
626 expansion_trail = subsym;
627 crc = expand_and_crc_sym(subsym, crc);
628 }
629 break;
630 }
631 }
632
633 {
634 static struct symbol **end = &visited_symbols;
635
636 if (!sym->visited) {
637 *end = sym;
638 end = &sym->visited;
639 sym->visited = (struct symbol *)-1L;
640 }
641 }
642
643 return crc;
644}
645
646void export_symbol(const char *name)
647{
648 struct symbol *sym;
649
650 sym = find_symbol(name, SYM_NORMAL, 0);
651 if (!sym)
652 error_with_pos("export undefined symbol %s", name);
653 else {
654 unsigned long crc;
655 int has_changed = 0;
656
657 if (flag_dump_defs)
658 fprintf(debugfile, "Export %s == <", name);
659
660 expansion_trail = (struct symbol *)-1L;
661
662 sym->expansion_trail = expansion_trail;
663 expansion_trail = sym;
664 crc = expand_and_crc_sym(sym, 0xffffffff) ^ 0xffffffff;
665
666 sym = expansion_trail;
667 while (sym != (struct symbol *)-1L) {
668 struct symbol *n = sym->expansion_trail;
669
670 if (sym->status != STATUS_UNCHANGED) {
671 if (!has_changed) {
672 print_location();
673 fprintf(stderr, "%s: %s: modversion "
674 "changed because of changes "
675 "in ", flag_preserve ? "error" :
676 "warning", name);
677 } else
678 fprintf(stderr, ", ");
679 print_type_name(sym->type, sym->name);
680 if (sym->status == STATUS_DEFINED)
681 fprintf(stderr, " (became defined)");
682 has_changed = 1;
683 if (flag_preserve)
684 errors++;
685 }
686 sym->expansion_trail = 0;
687 sym = n;
688 }
689 if (has_changed)
690 fprintf(stderr, "\n");
691
692 if (flag_dump_defs)
693 fputs(">\n", debugfile);
694
695
696 printf(!flag_rel_crcs ? "%s__crc_%s = 0x%08lx;\n" :
697 "SECTIONS { .rodata : ALIGN(4) { "
698 "%s__crc_%s = .; LONG(0x%08lx); } }\n",
699 mod_prefix, name, crc);
700 }
701}
702
703
704
705static void print_location(void)
706{
707 fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>", cur_line);
708}
709
710static void print_type_name(enum symbol_type type, const char *name)
711{
712 if (symbol_types[type].name)
713 fprintf(stderr, "%s %s", symbol_types[type].name, name);
714 else
715 fprintf(stderr, "%s", name);
716}
717
718void error_with_pos(const char *fmt, ...)
719{
720 va_list args;
721
722 if (flag_warnings) {
723 print_location();
724
725 va_start(args, fmt);
726 vfprintf(stderr, fmt, args);
727 va_end(args);
728 putc('\n', stderr);
729
730 errors++;
731 }
732}
733
734static void genksyms_usage(void)
735{
736 fputs("Usage:\n" "genksyms [-adDTwqhVR] > /path/to/.tmp_obj.ver\n" "\n"
737#ifdef __GNU_LIBRARY__
738 " -s, --symbol-prefix Select symbol prefix\n"
739 " -d, --debug Increment the debug level (repeatable)\n"
740 " -D, --dump Dump expanded symbol defs (for debugging only)\n"
741 " -r, --reference file Read reference symbols from a file\n"
742 " -T, --dump-types file Dump expanded types into file\n"
743 " -p, --preserve Preserve reference modversions or fail\n"
744 " -w, --warnings Enable warnings\n"
745 " -q, --quiet Disable warnings (default)\n"
746 " -h, --help Print this message\n"
747 " -V, --version Print the release version\n"
748 " -R, --relative-crc Emit section relative symbol CRCs\n"
749#else
750 " -s Select symbol prefix\n"
751 " -d Increment the debug level (repeatable)\n"
752 " -D Dump expanded symbol defs (for debugging only)\n"
753 " -r file Read reference symbols from a file\n"
754 " -T file Dump expanded types into file\n"
755 " -p Preserve reference modversions or fail\n"
756 " -w Enable warnings\n"
757 " -q Disable warnings (default)\n"
758 " -h Print this message\n"
759 " -V Print the release version\n"
760 " -R Emit section relative symbol CRCs\n"
761#endif
762 , stderr);
763}
764
765int main(int argc, char **argv)
766{
767 FILE *dumpfile = NULL, *ref_file = NULL;
768 int o;
769
770#ifdef __GNU_LIBRARY__
771 struct option long_opts[] = {
772 {"symbol-prefix", 1, 0, 's'},
773 {"debug", 0, 0, 'd'},
774 {"warnings", 0, 0, 'w'},
775 {"quiet", 0, 0, 'q'},
776 {"dump", 0, 0, 'D'},
777 {"reference", 1, 0, 'r'},
778 {"dump-types", 1, 0, 'T'},
779 {"preserve", 0, 0, 'p'},
780 {"version", 0, 0, 'V'},
781 {"help", 0, 0, 'h'},
782 {"relative-crc", 0, 0, 'R'},
783 {0, 0, 0, 0}
784 };
785
786 while ((o = getopt_long(argc, argv, "s:dwqVDr:T:phR",
787 &long_opts[0], NULL)) != EOF)
788#else
789 while ((o = getopt(argc, argv, "s:dwqVDr:T:phR")) != EOF)
790#endif
791 switch (o) {
792 case 's':
793 mod_prefix = optarg;
794 break;
795 case 'd':
796 flag_debug++;
797 break;
798 case 'w':
799 flag_warnings = 1;
800 break;
801 case 'q':
802 flag_warnings = 0;
803 break;
804 case 'V':
805 fputs("genksyms version 2.5.60\n", stderr);
806 break;
807 case 'D':
808 flag_dump_defs = 1;
809 break;
810 case 'r':
811 flag_reference = 1;
812 ref_file = fopen(optarg, "r");
813 if (!ref_file) {
814 perror(optarg);
815 return 1;
816 }
817 break;
818 case 'T':
819 flag_dump_types = 1;
820 dumpfile = fopen(optarg, "w");
821 if (!dumpfile) {
822 perror(optarg);
823 return 1;
824 }
825 break;
826 case 'p':
827 flag_preserve = 1;
828 break;
829 case 'h':
830 genksyms_usage();
831 return 0;
832 case 'R':
833 flag_rel_crcs = 1;
834 break;
835 default:
836 genksyms_usage();
837 return 1;
838 }
839 {
840 extern int yydebug;
841 extern int yy_flex_debug;
842
843 yydebug = (flag_debug > 1);
844 yy_flex_debug = (flag_debug > 2);
845
846 debugfile = stderr;
847
848 }
849
850 if (flag_reference) {
851 read_reference(ref_file);
852 fclose(ref_file);
853 }
854
855 yyparse();
856
857 if (flag_dump_types && visited_symbols) {
858 while (visited_symbols != (struct symbol *)-1L) {
859 struct symbol *sym = visited_symbols;
860
861 if (sym->is_override)
862 fputs("override ", dumpfile);
863 if (symbol_types[sym->type].n) {
864 putc(symbol_types[sym->type].n, dumpfile);
865 putc('#', dumpfile);
866 }
867 fputs(sym->name, dumpfile);
868 putc(' ', dumpfile);
869 if (sym->is_extern)
870 fputs("extern ", dumpfile);
871 print_list(dumpfile, sym->defn);
872 putc('\n', dumpfile);
873
874 visited_symbols = sym->visited;
875 sym->visited = NULL;
876 }
877 }
878
879 if (flag_debug) {
880 fprintf(debugfile, "Hash table occupancy %d/%d = %g\n",
881 nsyms, HASH_BUCKETS,
882 (double)nsyms / (double)HASH_BUCKETS);
883 }
884
885 if (dumpfile)
886 fclose(dumpfile);
887
888 return errors != 0;
889}
890
