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