1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* Generate kernel symbol version hashes. |
3 | Copyright 1996, 1997 Linux International. |
4 | |
5 | New implementation contributed by Richard Henderson <rth@tamu.edu> |
6 | Based on original work by Bjorn Ekwall <bj0rn@blox.se> |
7 | |
8 | This file was part of the Linux modutils 2.4.22: moved back into the |
9 | kernel sources by Rusty Russell/Kai Germaschewski. |
10 | |
11 | */ |
12 | |
13 | #include <stdio.h> |
14 | #include <string.h> |
15 | #include <stdlib.h> |
16 | #include <unistd.h> |
17 | #include <assert.h> |
18 | #include <stdarg.h> |
19 | #ifdef __GNU_LIBRARY__ |
20 | #include <getopt.h> |
21 | #endif /* __GNU_LIBRARY__ */ |
22 | |
23 | #include "genksyms.h" |
24 | /*----------------------------------------------------------------------*/ |
25 | |
26 | #define HASH_BUCKETS 4096 |
27 | |
28 | static struct symbol *symtab[HASH_BUCKETS]; |
29 | static FILE *debugfile; |
30 | |
31 | int cur_line = 1; |
32 | char *cur_filename; |
33 | int in_source_file; |
34 | |
35 | static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types, |
36 | flag_preserve, flag_warnings; |
37 | |
38 | static int errors; |
39 | static int nsyms; |
40 | |
41 | static struct symbol *expansion_trail; |
42 | static struct symbol *visited_symbols; |
43 | |
44 | static const struct { |
45 | int n; |
46 | const char *name; |
47 | } symbol_types[] = { |
48 | [SYM_NORMAL] = { 0, NULL}, |
49 | [SYM_TYPEDEF] = {.n: 't', .name: "typedef" }, |
50 | [SYM_ENUM] = {.n: 'e', .name: "enum" }, |
51 | [SYM_STRUCT] = {.n: 's', .name: "struct" }, |
52 | [SYM_UNION] = {.n: 'u', .name: "union" }, |
53 | [SYM_ENUM_CONST] = {.n: 'E', .name: "enum constant" }, |
54 | }; |
55 | |
56 | static int equal_list(struct string_list *a, struct string_list *b); |
57 | static void print_list(FILE * f, struct string_list *list); |
58 | static struct string_list *concat_list(struct string_list *start, ...); |
59 | static struct string_list *mk_node(const char *string); |
60 | static void print_location(void); |
61 | static void print_type_name(enum symbol_type type, const char *name); |
62 | |
63 | /*----------------------------------------------------------------------*/ |
64 | |
65 | static const unsigned int crctab32[] = { |
66 | 0x00000000U, 0x77073096U, 0xee0e612cU, 0x990951baU, 0x076dc419U, |
67 | 0x706af48fU, 0xe963a535U, 0x9e6495a3U, 0x0edb8832U, 0x79dcb8a4U, |
68 | 0xe0d5e91eU, 0x97d2d988U, 0x09b64c2bU, 0x7eb17cbdU, 0xe7b82d07U, |
69 | 0x90bf1d91U, 0x1db71064U, 0x6ab020f2U, 0xf3b97148U, 0x84be41deU, |
70 | 0x1adad47dU, 0x6ddde4ebU, 0xf4d4b551U, 0x83d385c7U, 0x136c9856U, |
71 | 0x646ba8c0U, 0xfd62f97aU, 0x8a65c9ecU, 0x14015c4fU, 0x63066cd9U, |
72 | 0xfa0f3d63U, 0x8d080df5U, 0x3b6e20c8U, 0x4c69105eU, 0xd56041e4U, |
73 | 0xa2677172U, 0x3c03e4d1U, 0x4b04d447U, 0xd20d85fdU, 0xa50ab56bU, |
74 | 0x35b5a8faU, 0x42b2986cU, 0xdbbbc9d6U, 0xacbcf940U, 0x32d86ce3U, |
75 | 0x45df5c75U, 0xdcd60dcfU, 0xabd13d59U, 0x26d930acU, 0x51de003aU, |
76 | 0xc8d75180U, 0xbfd06116U, 0x21b4f4b5U, 0x56b3c423U, 0xcfba9599U, |
77 | 0xb8bda50fU, 0x2802b89eU, 0x5f058808U, 0xc60cd9b2U, 0xb10be924U, |
78 | 0x2f6f7c87U, 0x58684c11U, 0xc1611dabU, 0xb6662d3dU, 0x76dc4190U, |
79 | 0x01db7106U, 0x98d220bcU, 0xefd5102aU, 0x71b18589U, 0x06b6b51fU, |
80 | 0x9fbfe4a5U, 0xe8b8d433U, 0x7807c9a2U, 0x0f00f934U, 0x9609a88eU, |
81 | 0xe10e9818U, 0x7f6a0dbbU, 0x086d3d2dU, 0x91646c97U, 0xe6635c01U, |
82 | 0x6b6b51f4U, 0x1c6c6162U, 0x856530d8U, 0xf262004eU, 0x6c0695edU, |
83 | 0x1b01a57bU, 0x8208f4c1U, 0xf50fc457U, 0x65b0d9c6U, 0x12b7e950U, |
84 | 0x8bbeb8eaU, 0xfcb9887cU, 0x62dd1ddfU, 0x15da2d49U, 0x8cd37cf3U, |
85 | 0xfbd44c65U, 0x4db26158U, 0x3ab551ceU, 0xa3bc0074U, 0xd4bb30e2U, |
86 | 0x4adfa541U, 0x3dd895d7U, 0xa4d1c46dU, 0xd3d6f4fbU, 0x4369e96aU, |
87 | 0x346ed9fcU, 0xad678846U, 0xda60b8d0U, 0x44042d73U, 0x33031de5U, |
88 | 0xaa0a4c5fU, 0xdd0d7cc9U, 0x5005713cU, 0x270241aaU, 0xbe0b1010U, |
89 | 0xc90c2086U, 0x5768b525U, 0x206f85b3U, 0xb966d409U, 0xce61e49fU, |
90 | 0x5edef90eU, 0x29d9c998U, 0xb0d09822U, 0xc7d7a8b4U, 0x59b33d17U, |
91 | 0x2eb40d81U, 0xb7bd5c3bU, 0xc0ba6cadU, 0xedb88320U, 0x9abfb3b6U, |
92 | 0x03b6e20cU, 0x74b1d29aU, 0xead54739U, 0x9dd277afU, 0x04db2615U, |
93 | 0x73dc1683U, 0xe3630b12U, 0x94643b84U, 0x0d6d6a3eU, 0x7a6a5aa8U, |
94 | 0xe40ecf0bU, 0x9309ff9dU, 0x0a00ae27U, 0x7d079eb1U, 0xf00f9344U, |
95 | 0x8708a3d2U, 0x1e01f268U, 0x6906c2feU, 0xf762575dU, 0x806567cbU, |
96 | 0x196c3671U, 0x6e6b06e7U, 0xfed41b76U, 0x89d32be0U, 0x10da7a5aU, |
97 | 0x67dd4accU, 0xf9b9df6fU, 0x8ebeeff9U, 0x17b7be43U, 0x60b08ed5U, |
98 | 0xd6d6a3e8U, 0xa1d1937eU, 0x38d8c2c4U, 0x4fdff252U, 0xd1bb67f1U, |
99 | 0xa6bc5767U, 0x3fb506ddU, 0x48b2364bU, 0xd80d2bdaU, 0xaf0a1b4cU, |
100 | 0x36034af6U, 0x41047a60U, 0xdf60efc3U, 0xa867df55U, 0x316e8eefU, |
101 | 0x4669be79U, 0xcb61b38cU, 0xbc66831aU, 0x256fd2a0U, 0x5268e236U, |
102 | 0xcc0c7795U, 0xbb0b4703U, 0x220216b9U, 0x5505262fU, 0xc5ba3bbeU, |
103 | 0xb2bd0b28U, 0x2bb45a92U, 0x5cb36a04U, 0xc2d7ffa7U, 0xb5d0cf31U, |
104 | 0x2cd99e8bU, 0x5bdeae1dU, 0x9b64c2b0U, 0xec63f226U, 0x756aa39cU, |
105 | 0x026d930aU, 0x9c0906a9U, 0xeb0e363fU, 0x72076785U, 0x05005713U, |
106 | 0x95bf4a82U, 0xe2b87a14U, 0x7bb12baeU, 0x0cb61b38U, 0x92d28e9bU, |
107 | 0xe5d5be0dU, 0x7cdcefb7U, 0x0bdbdf21U, 0x86d3d2d4U, 0xf1d4e242U, |
108 | 0x68ddb3f8U, 0x1fda836eU, 0x81be16cdU, 0xf6b9265bU, 0x6fb077e1U, |
109 | 0x18b74777U, 0x88085ae6U, 0xff0f6a70U, 0x66063bcaU, 0x11010b5cU, |
110 | 0x8f659effU, 0xf862ae69U, 0x616bffd3U, 0x166ccf45U, 0xa00ae278U, |
111 | 0xd70dd2eeU, 0x4e048354U, 0x3903b3c2U, 0xa7672661U, 0xd06016f7U, |
112 | 0x4969474dU, 0x3e6e77dbU, 0xaed16a4aU, 0xd9d65adcU, 0x40df0b66U, |
113 | 0x37d83bf0U, 0xa9bcae53U, 0xdebb9ec5U, 0x47b2cf7fU, 0x30b5ffe9U, |
114 | 0xbdbdf21cU, 0xcabac28aU, 0x53b39330U, 0x24b4a3a6U, 0xbad03605U, |
115 | 0xcdd70693U, 0x54de5729U, 0x23d967bfU, 0xb3667a2eU, 0xc4614ab8U, |
116 | 0x5d681b02U, 0x2a6f2b94U, 0xb40bbe37U, 0xc30c8ea1U, 0x5a05df1bU, |
117 | 0x2d02ef8dU |
118 | }; |
119 | |
120 | static unsigned long partial_crc32_one(unsigned char c, unsigned long crc) |
121 | { |
122 | return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8); |
123 | } |
124 | |
125 | static unsigned long partial_crc32(const char *s, unsigned long crc) |
126 | { |
127 | while (*s) |
128 | crc = partial_crc32_one(c: *s++, crc); |
129 | return crc; |
130 | } |
131 | |
132 | static unsigned long crc32(const char *s) |
133 | { |
134 | return partial_crc32(s, crc: 0xffffffff) ^ 0xffffffff; |
135 | } |
136 | |
137 | /*----------------------------------------------------------------------*/ |
138 | |
139 | static enum symbol_type map_to_ns(enum symbol_type t) |
140 | { |
141 | switch (t) { |
142 | case SYM_ENUM_CONST: |
143 | case SYM_NORMAL: |
144 | case SYM_TYPEDEF: |
145 | return SYM_NORMAL; |
146 | case SYM_ENUM: |
147 | case SYM_STRUCT: |
148 | case SYM_UNION: |
149 | return SYM_STRUCT; |
150 | } |
151 | return t; |
152 | } |
153 | |
154 | struct symbol *find_symbol(const char *name, enum symbol_type ns, int exact) |
155 | { |
156 | unsigned long h = crc32(s: name) % HASH_BUCKETS; |
157 | struct symbol *sym; |
158 | |
159 | for (sym = symtab[h]; sym; sym = sym->hash_next) |
160 | if (map_to_ns(t: sym->type) == map_to_ns(t: ns) && |
161 | strcmp(s1: name, s2: sym->name) == 0 && |
162 | sym->is_declared) |
163 | break; |
164 | |
165 | if (exact && sym && sym->type != ns) |
166 | return NULL; |
167 | return sym; |
168 | } |
169 | |
170 | static int is_unknown_symbol(struct symbol *sym) |
171 | { |
172 | struct string_list *defn; |
173 | |
174 | return ((sym->type == SYM_STRUCT || |
175 | sym->type == SYM_UNION || |
176 | sym->type == SYM_ENUM) && |
177 | (defn = sym->defn) && defn->tag == SYM_NORMAL && |
178 | strcmp(s1: defn->string, s2: "}" ) == 0 && |
179 | (defn = defn->next) && defn->tag == SYM_NORMAL && |
180 | strcmp(s1: defn->string, s2: "UNKNOWN" ) == 0 && |
181 | (defn = defn->next) && defn->tag == SYM_NORMAL && |
182 | strcmp(s1: defn->string, s2: "{" ) == 0); |
183 | } |
184 | |
185 | static struct symbol *__add_symbol(const char *name, enum symbol_type type, |
186 | struct string_list *defn, int is_extern, |
187 | int is_reference) |
188 | { |
189 | unsigned long h; |
190 | struct symbol *sym; |
191 | enum symbol_status status = STATUS_UNCHANGED; |
192 | /* The parser adds symbols in the order their declaration completes, |
193 | * so it is safe to store the value of the previous enum constant in |
194 | * a static variable. |
195 | */ |
196 | static int enum_counter; |
197 | static struct string_list *last_enum_expr; |
198 | |
199 | if (type == SYM_ENUM_CONST) { |
200 | if (defn) { |
201 | free_list(s: last_enum_expr, NULL); |
202 | last_enum_expr = copy_list_range(start: defn, NULL); |
203 | enum_counter = 1; |
204 | } else { |
205 | struct string_list *expr; |
206 | char buf[20]; |
207 | |
208 | snprintf(s: buf, maxlen: sizeof(buf), format: "%d" , enum_counter++); |
209 | if (last_enum_expr) { |
210 | expr = copy_list_range(start: last_enum_expr, NULL); |
211 | defn = concat_list(start: mk_node(string: "(" ), |
212 | expr, |
213 | mk_node(string: ")" ), |
214 | mk_node(string: "+" ), |
215 | mk_node(string: buf), NULL); |
216 | } else { |
217 | defn = mk_node(string: buf); |
218 | } |
219 | } |
220 | } else if (type == SYM_ENUM) { |
221 | free_list(s: last_enum_expr, NULL); |
222 | last_enum_expr = NULL; |
223 | enum_counter = 0; |
224 | if (!name) |
225 | /* Anonymous enum definition, nothing more to do */ |
226 | return NULL; |
227 | } |
228 | |
229 | h = crc32(s: name) % HASH_BUCKETS; |
230 | for (sym = symtab[h]; sym; sym = sym->hash_next) { |
231 | if (map_to_ns(t: sym->type) == map_to_ns(t: type) && |
232 | strcmp(s1: name, s2: sym->name) == 0) { |
233 | if (is_reference) |
234 | /* fall through */ ; |
235 | else if (sym->type == type && |
236 | equal_list(a: sym->defn, b: defn)) { |
237 | if (!sym->is_declared && sym->is_override) { |
238 | print_location(); |
239 | print_type_name(type, name); |
240 | fprintf(stderr, format: " modversion is " |
241 | "unchanged\n" ); |
242 | } |
243 | sym->is_declared = 1; |
244 | return sym; |
245 | } else if (!sym->is_declared) { |
246 | if (sym->is_override && flag_preserve) { |
247 | print_location(); |
248 | fprintf(stderr, format: "ignoring " ); |
249 | print_type_name(type, name); |
250 | fprintf(stderr, format: " modversion change\n" ); |
251 | sym->is_declared = 1; |
252 | return sym; |
253 | } else { |
254 | status = is_unknown_symbol(sym) ? |
255 | STATUS_DEFINED : STATUS_MODIFIED; |
256 | } |
257 | } else { |
258 | error_with_pos("redefinition of %s" , name); |
259 | return sym; |
260 | } |
261 | break; |
262 | } |
263 | } |
264 | |
265 | if (sym) { |
266 | struct symbol **psym; |
267 | |
268 | for (psym = &symtab[h]; *psym; psym = &(*psym)->hash_next) { |
269 | if (*psym == sym) { |
270 | *psym = sym->hash_next; |
271 | break; |
272 | } |
273 | } |
274 | --nsyms; |
275 | } |
276 | |
277 | sym = xmalloc(sizeof(*sym)); |
278 | sym->name = name; |
279 | sym->type = type; |
280 | sym->defn = defn; |
281 | sym->expansion_trail = NULL; |
282 | sym->visited = NULL; |
283 | sym->is_extern = is_extern; |
284 | |
285 | sym->hash_next = symtab[h]; |
286 | symtab[h] = sym; |
287 | |
288 | sym->is_declared = !is_reference; |
289 | sym->status = status; |
290 | sym->is_override = 0; |
291 | |
292 | if (flag_debug) { |
293 | if (symbol_types[type].name) |
294 | fprintf(stream: debugfile, format: "Defn for %s %s == <" , |
295 | symbol_types[type].name, name); |
296 | else |
297 | fprintf(stream: debugfile, format: "Defn for type%d %s == <" , |
298 | type, name); |
299 | if (is_extern) |
300 | fputs(s: "extern " , stream: debugfile); |
301 | print_list(f: debugfile, list: defn); |
302 | fputs(s: ">\n" , stream: debugfile); |
303 | } |
304 | |
305 | ++nsyms; |
306 | return sym; |
307 | } |
308 | |
309 | struct symbol *add_symbol(const char *name, enum symbol_type type, |
310 | struct string_list *defn, int is_extern) |
311 | { |
312 | return __add_symbol(name, type, defn, is_extern, is_reference: 0); |
313 | } |
314 | |
315 | static struct symbol *add_reference_symbol(const char *name, enum symbol_type type, |
316 | struct string_list *defn, int is_extern) |
317 | { |
318 | return __add_symbol(name, type, defn, is_extern, is_reference: 1); |
319 | } |
320 | |
321 | /*----------------------------------------------------------------------*/ |
322 | |
323 | void free_node(struct string_list *node) |
324 | { |
325 | free(ptr: node->string); |
326 | free(ptr: node); |
327 | } |
328 | |
329 | void free_list(struct string_list *s, struct string_list *e) |
330 | { |
331 | while (s != e) { |
332 | struct string_list *next = s->next; |
333 | free_node(node: s); |
334 | s = next; |
335 | } |
336 | } |
337 | |
338 | static struct string_list *mk_node(const char *string) |
339 | { |
340 | struct string_list *newnode; |
341 | |
342 | newnode = xmalloc(sizeof(*newnode)); |
343 | newnode->string = xstrdup(string); |
344 | newnode->tag = SYM_NORMAL; |
345 | newnode->next = NULL; |
346 | |
347 | return newnode; |
348 | } |
349 | |
350 | static struct string_list *concat_list(struct string_list *start, ...) |
351 | { |
352 | va_list ap; |
353 | struct string_list *n, *n2; |
354 | |
355 | if (!start) |
356 | return NULL; |
357 | for (va_start(ap, start); (n = va_arg(ap, struct string_list *));) { |
358 | for (n2 = n; n2->next; n2 = n2->next) |
359 | ; |
360 | n2->next = start; |
361 | start = n; |
362 | } |
363 | va_end(ap); |
364 | return start; |
365 | } |
366 | |
367 | struct string_list *copy_node(struct string_list *node) |
368 | { |
369 | struct string_list *newnode; |
370 | |
371 | newnode = xmalloc(sizeof(*newnode)); |
372 | newnode->string = xstrdup(node->string); |
373 | newnode->tag = node->tag; |
374 | |
375 | return newnode; |
376 | } |
377 | |
378 | struct string_list *copy_list_range(struct string_list *start, |
379 | struct string_list *end) |
380 | { |
381 | struct string_list *res, *n; |
382 | |
383 | if (start == end) |
384 | return NULL; |
385 | n = res = copy_node(node: start); |
386 | for (start = start->next; start != end; start = start->next) { |
387 | n->next = copy_node(node: start); |
388 | n = n->next; |
389 | } |
390 | n->next = NULL; |
391 | return res; |
392 | } |
393 | |
394 | static int equal_list(struct string_list *a, struct string_list *b) |
395 | { |
396 | while (a && b) { |
397 | if (a->tag != b->tag || strcmp(s1: a->string, s2: b->string)) |
398 | return 0; |
399 | a = a->next; |
400 | b = b->next; |
401 | } |
402 | |
403 | return !a && !b; |
404 | } |
405 | |
406 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) |
407 | |
408 | static struct string_list *read_node(FILE *f) |
409 | { |
410 | char buffer[256]; |
411 | struct string_list node = { |
412 | .string = buffer, |
413 | .tag = SYM_NORMAL }; |
414 | int c, in_string = 0; |
415 | |
416 | while ((c = fgetc(stream: f)) != EOF) { |
417 | if (!in_string && c == ' ') { |
418 | if (node.string == buffer) |
419 | continue; |
420 | break; |
421 | } else if (c == '"') { |
422 | in_string = !in_string; |
423 | } else if (c == '\n') { |
424 | if (node.string == buffer) |
425 | return NULL; |
426 | ungetc(c: c, stream: f); |
427 | break; |
428 | } |
429 | if (node.string >= buffer + sizeof(buffer) - 1) { |
430 | fprintf(stderr, format: "Token too long\n" ); |
431 | exit(status: 1); |
432 | } |
433 | *node.string++ = c; |
434 | } |
435 | if (node.string == buffer) |
436 | return NULL; |
437 | *node.string = 0; |
438 | node.string = buffer; |
439 | |
440 | if (node.string[1] == '#') { |
441 | size_t n; |
442 | |
443 | for (n = 0; n < ARRAY_SIZE(symbol_types); n++) { |
444 | if (node.string[0] == symbol_types[n].n) { |
445 | node.tag = n; |
446 | node.string += 2; |
447 | return copy_node(node: &node); |
448 | } |
449 | } |
450 | fprintf(stderr, format: "Unknown type %c\n" , node.string[0]); |
451 | exit(status: 1); |
452 | } |
453 | return copy_node(node: &node); |
454 | } |
455 | |
456 | static void read_reference(FILE *f) |
457 | { |
458 | while (!feof(stream: f)) { |
459 | struct string_list *defn = NULL; |
460 | struct string_list *sym, *def; |
461 | int is_extern = 0, is_override = 0; |
462 | struct symbol *subsym; |
463 | |
464 | sym = read_node(f); |
465 | if (sym && sym->tag == SYM_NORMAL && |
466 | !strcmp(s1: sym->string, s2: "override" )) { |
467 | is_override = 1; |
468 | free_node(node: sym); |
469 | sym = read_node(f); |
470 | } |
471 | if (!sym) |
472 | continue; |
473 | def = read_node(f); |
474 | if (def && def->tag == SYM_NORMAL && |
475 | !strcmp(s1: def->string, s2: "extern" )) { |
476 | is_extern = 1; |
477 | free_node(node: def); |
478 | def = read_node(f); |
479 | } |
480 | while (def) { |
481 | def->next = defn; |
482 | defn = def; |
483 | def = read_node(f); |
484 | } |
485 | subsym = add_reference_symbol(xstrdup(sym->string), type: sym->tag, |
486 | defn, is_extern); |
487 | subsym->is_override = is_override; |
488 | free_node(node: sym); |
489 | } |
490 | } |
491 | |
492 | static void print_node(FILE * f, struct string_list *list) |
493 | { |
494 | if (symbol_types[list->tag].n) { |
495 | putc(c: symbol_types[list->tag].n, stream: f); |
496 | putc(c: '#', stream: f); |
497 | } |
498 | fputs(s: list->string, stream: f); |
499 | } |
500 | |
501 | static void print_list(FILE * f, struct string_list *list) |
502 | { |
503 | struct string_list **e, **b; |
504 | struct string_list *tmp, **tmp2; |
505 | int elem = 1; |
506 | |
507 | if (list == NULL) { |
508 | fputs(s: "(nil)" , stream: f); |
509 | return; |
510 | } |
511 | |
512 | tmp = list; |
513 | while ((tmp = tmp->next) != NULL) |
514 | elem++; |
515 | |
516 | b = alloca(elem * sizeof(*e)); |
517 | e = b + elem; |
518 | tmp2 = e - 1; |
519 | |
520 | (*tmp2--) = list; |
521 | while ((list = list->next) != NULL) |
522 | *(tmp2--) = list; |
523 | |
524 | while (b != e) { |
525 | print_node(f, list: *b++); |
526 | putc(c: ' ', stream: f); |
527 | } |
528 | } |
529 | |
530 | static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc) |
531 | { |
532 | struct string_list *list = sym->defn; |
533 | struct string_list **e, **b; |
534 | struct string_list *tmp, **tmp2; |
535 | int elem = 1; |
536 | |
537 | if (!list) |
538 | return crc; |
539 | |
540 | tmp = list; |
541 | while ((tmp = tmp->next) != NULL) |
542 | elem++; |
543 | |
544 | b = alloca(elem * sizeof(*e)); |
545 | e = b + elem; |
546 | tmp2 = e - 1; |
547 | |
548 | *(tmp2--) = list; |
549 | while ((list = list->next) != NULL) |
550 | *(tmp2--) = list; |
551 | |
552 | while (b != e) { |
553 | struct string_list *cur; |
554 | struct symbol *subsym; |
555 | |
556 | cur = *(b++); |
557 | switch (cur->tag) { |
558 | case SYM_NORMAL: |
559 | if (flag_dump_defs) |
560 | fprintf(stream: debugfile, format: "%s " , cur->string); |
561 | crc = partial_crc32(s: cur->string, crc); |
562 | crc = partial_crc32_one(c: ' ', crc); |
563 | break; |
564 | |
565 | case SYM_ENUM_CONST: |
566 | case SYM_TYPEDEF: |
567 | subsym = find_symbol(name: cur->string, ns: cur->tag, exact: 0); |
568 | /* FIXME: Bad reference files can segfault here. */ |
569 | if (subsym->expansion_trail) { |
570 | if (flag_dump_defs) |
571 | fprintf(stream: debugfile, format: "%s " , cur->string); |
572 | crc = partial_crc32(s: cur->string, crc); |
573 | crc = partial_crc32_one(c: ' ', crc); |
574 | } else { |
575 | subsym->expansion_trail = expansion_trail; |
576 | expansion_trail = subsym; |
577 | crc = expand_and_crc_sym(sym: subsym, crc); |
578 | } |
579 | break; |
580 | |
581 | case SYM_STRUCT: |
582 | case SYM_UNION: |
583 | case SYM_ENUM: |
584 | subsym = find_symbol(name: cur->string, ns: cur->tag, exact: 0); |
585 | if (!subsym) { |
586 | struct string_list *n; |
587 | |
588 | error_with_pos("expand undefined %s %s" , |
589 | symbol_types[cur->tag].name, |
590 | cur->string); |
591 | n = concat_list(start: mk_node |
592 | (string: symbol_types[cur->tag].name), |
593 | mk_node(string: cur->string), |
594 | mk_node(string: "{" ), |
595 | mk_node(string: "UNKNOWN" ), |
596 | mk_node(string: "}" ), NULL); |
597 | subsym = |
598 | add_symbol(name: cur->string, type: cur->tag, defn: n, is_extern: 0); |
599 | } |
600 | if (subsym->expansion_trail) { |
601 | if (flag_dump_defs) { |
602 | fprintf(stream: debugfile, format: "%s %s " , |
603 | symbol_types[cur->tag].name, |
604 | cur->string); |
605 | } |
606 | |
607 | crc = partial_crc32(s: symbol_types[cur->tag].name, |
608 | crc); |
609 | crc = partial_crc32_one(c: ' ', crc); |
610 | crc = partial_crc32(s: cur->string, crc); |
611 | crc = partial_crc32_one(c: ' ', crc); |
612 | } else { |
613 | subsym->expansion_trail = expansion_trail; |
614 | expansion_trail = subsym; |
615 | crc = expand_and_crc_sym(sym: subsym, crc); |
616 | } |
617 | break; |
618 | } |
619 | } |
620 | |
621 | { |
622 | static struct symbol **end = &visited_symbols; |
623 | |
624 | if (!sym->visited) { |
625 | *end = sym; |
626 | end = &sym->visited; |
627 | sym->visited = (struct symbol *)-1L; |
628 | } |
629 | } |
630 | |
631 | return crc; |
632 | } |
633 | |
634 | void export_symbol(const char *name) |
635 | { |
636 | struct symbol *sym; |
637 | |
638 | sym = find_symbol(name, ns: SYM_NORMAL, exact: 0); |
639 | if (!sym) |
640 | error_with_pos("export undefined symbol %s" , name); |
641 | else { |
642 | unsigned long crc; |
643 | int has_changed = 0; |
644 | |
645 | if (flag_dump_defs) |
646 | fprintf(stream: debugfile, format: "Export %s == <" , name); |
647 | |
648 | expansion_trail = (struct symbol *)-1L; |
649 | |
650 | sym->expansion_trail = expansion_trail; |
651 | expansion_trail = sym; |
652 | crc = expand_and_crc_sym(sym, crc: 0xffffffff) ^ 0xffffffff; |
653 | |
654 | sym = expansion_trail; |
655 | while (sym != (struct symbol *)-1L) { |
656 | struct symbol *n = sym->expansion_trail; |
657 | |
658 | if (sym->status != STATUS_UNCHANGED) { |
659 | if (!has_changed) { |
660 | print_location(); |
661 | fprintf(stderr, format: "%s: %s: modversion " |
662 | "changed because of changes " |
663 | "in " , flag_preserve ? "error" : |
664 | "warning" , name); |
665 | } else |
666 | fprintf(stderr, format: ", " ); |
667 | print_type_name(type: sym->type, name: sym->name); |
668 | if (sym->status == STATUS_DEFINED) |
669 | fprintf(stderr, format: " (became defined)" ); |
670 | has_changed = 1; |
671 | if (flag_preserve) |
672 | errors++; |
673 | } |
674 | sym->expansion_trail = 0; |
675 | sym = n; |
676 | } |
677 | if (has_changed) |
678 | fprintf(stderr, format: "\n" ); |
679 | |
680 | if (flag_dump_defs) |
681 | fputs(s: ">\n" , stream: debugfile); |
682 | |
683 | printf(format: "#SYMVER %s 0x%08lx\n" , name, crc); |
684 | } |
685 | } |
686 | |
687 | /*----------------------------------------------------------------------*/ |
688 | |
689 | static void print_location(void) |
690 | { |
691 | fprintf(stderr, format: "%s:%d: " , cur_filename ? : "<stdin>" , cur_line); |
692 | } |
693 | |
694 | static void print_type_name(enum symbol_type type, const char *name) |
695 | { |
696 | if (symbol_types[type].name) |
697 | fprintf(stderr, format: "%s %s" , symbol_types[type].name, name); |
698 | else |
699 | fprintf(stderr, format: "%s" , name); |
700 | } |
701 | |
702 | void error_with_pos(const char *fmt, ...) |
703 | { |
704 | va_list args; |
705 | |
706 | if (flag_warnings) { |
707 | print_location(); |
708 | |
709 | va_start(args, fmt); |
710 | vfprintf(stderr, format: fmt, arg: args); |
711 | va_end(args); |
712 | putc(c: '\n', stderr); |
713 | |
714 | errors++; |
715 | } |
716 | } |
717 | |
718 | static void genksyms_usage(void) |
719 | { |
720 | fputs(s: "Usage:\n" "genksyms [-adDTwqhVR] > /path/to/.tmp_obj.ver\n" "\n" |
721 | #ifdef __GNU_LIBRARY__ |
722 | " -s, --symbol-prefix Select symbol prefix\n" |
723 | " -d, --debug Increment the debug level (repeatable)\n" |
724 | " -D, --dump Dump expanded symbol defs (for debugging only)\n" |
725 | " -r, --reference file Read reference symbols from a file\n" |
726 | " -T, --dump-types file Dump expanded types into file\n" |
727 | " -p, --preserve Preserve reference modversions or fail\n" |
728 | " -w, --warnings Enable warnings\n" |
729 | " -q, --quiet Disable warnings (default)\n" |
730 | " -h, --help Print this message\n" |
731 | " -V, --version Print the release version\n" |
732 | #else /* __GNU_LIBRARY__ */ |
733 | " -s Select symbol prefix\n" |
734 | " -d Increment the debug level (repeatable)\n" |
735 | " -D Dump expanded symbol defs (for debugging only)\n" |
736 | " -r file Read reference symbols from a file\n" |
737 | " -T file Dump expanded types into file\n" |
738 | " -p Preserve reference modversions or fail\n" |
739 | " -w Enable warnings\n" |
740 | " -q Disable warnings (default)\n" |
741 | " -h Print this message\n" |
742 | " -V Print the release version\n" |
743 | #endif /* __GNU_LIBRARY__ */ |
744 | , stderr); |
745 | } |
746 | |
747 | int main(int argc, char **argv) |
748 | { |
749 | FILE *dumpfile = NULL, *ref_file = NULL; |
750 | int o; |
751 | |
752 | #ifdef __GNU_LIBRARY__ |
753 | struct option long_opts[] = { |
754 | {"debug" , 0, 0, 'd'}, |
755 | {"warnings" , 0, 0, 'w'}, |
756 | {"quiet" , 0, 0, 'q'}, |
757 | {"dump" , 0, 0, 'D'}, |
758 | {"reference" , 1, 0, 'r'}, |
759 | {"dump-types" , 1, 0, 'T'}, |
760 | {"preserve" , 0, 0, 'p'}, |
761 | {"version" , 0, 0, 'V'}, |
762 | {"help" , 0, 0, 'h'}, |
763 | {0, 0, 0, 0} |
764 | }; |
765 | |
766 | while ((o = getopt_long(argc: argc, argv: argv, shortopts: "s:dwqVDr:T:ph" , |
767 | longopts: &long_opts[0], NULL)) != EOF) |
768 | #else /* __GNU_LIBRARY__ */ |
769 | while ((o = getopt(argc, argv, "s:dwqVDr:T:ph" )) != EOF) |
770 | #endif /* __GNU_LIBRARY__ */ |
771 | switch (o) { |
772 | case 'd': |
773 | flag_debug++; |
774 | break; |
775 | case 'w': |
776 | flag_warnings = 1; |
777 | break; |
778 | case 'q': |
779 | flag_warnings = 0; |
780 | break; |
781 | case 'V': |
782 | fputs(s: "genksyms version 2.5.60\n" , stderr); |
783 | break; |
784 | case 'D': |
785 | flag_dump_defs = 1; |
786 | break; |
787 | case 'r': |
788 | flag_reference = 1; |
789 | ref_file = fopen(filename: optarg, modes: "r" ); |
790 | if (!ref_file) { |
791 | perror(s: optarg); |
792 | return 1; |
793 | } |
794 | break; |
795 | case 'T': |
796 | flag_dump_types = 1; |
797 | dumpfile = fopen(filename: optarg, modes: "w" ); |
798 | if (!dumpfile) { |
799 | perror(s: optarg); |
800 | return 1; |
801 | } |
802 | break; |
803 | case 'p': |
804 | flag_preserve = 1; |
805 | break; |
806 | case 'h': |
807 | genksyms_usage(); |
808 | return 0; |
809 | default: |
810 | genksyms_usage(); |
811 | return 1; |
812 | } |
813 | { |
814 | extern int yydebug; |
815 | extern int yy_flex_debug; |
816 | |
817 | yydebug = (flag_debug > 1); |
818 | yy_flex_debug = (flag_debug > 2); |
819 | |
820 | debugfile = stderr; |
821 | /* setlinebuf(debugfile); */ |
822 | } |
823 | |
824 | if (flag_reference) { |
825 | read_reference(f: ref_file); |
826 | fclose(stream: ref_file); |
827 | } |
828 | |
829 | yyparse(); |
830 | |
831 | if (flag_dump_types && visited_symbols) { |
832 | while (visited_symbols != (struct symbol *)-1L) { |
833 | struct symbol *sym = visited_symbols; |
834 | |
835 | if (sym->is_override) |
836 | fputs(s: "override " , stream: dumpfile); |
837 | if (symbol_types[sym->type].n) { |
838 | putc(c: symbol_types[sym->type].n, stream: dumpfile); |
839 | putc(c: '#', stream: dumpfile); |
840 | } |
841 | fputs(s: sym->name, stream: dumpfile); |
842 | putc(c: ' ', stream: dumpfile); |
843 | if (sym->is_extern) |
844 | fputs(s: "extern " , stream: dumpfile); |
845 | print_list(f: dumpfile, list: sym->defn); |
846 | putc(c: '\n', stream: dumpfile); |
847 | |
848 | visited_symbols = sym->visited; |
849 | sym->visited = NULL; |
850 | } |
851 | } |
852 | |
853 | if (flag_debug) { |
854 | fprintf(stream: debugfile, format: "Hash table occupancy %d/%d = %g\n" , |
855 | nsyms, HASH_BUCKETS, |
856 | (double)nsyms / (double)HASH_BUCKETS); |
857 | } |
858 | |
859 | if (dumpfile) |
860 | fclose(stream: dumpfile); |
861 | |
862 | return errors != 0; |
863 | } |
864 | |