Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
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 | ||
1a59d1b8 | 11 | */ |
1da177e4 LT |
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> | |
78c04153 | 21 | #endif /* __GNU_LIBRARY__ */ |
1da177e4 LT |
22 | |
23 | #include "genksyms.h" | |
1da177e4 LT |
24 | /*----------------------------------------------------------------------*/ |
25 | ||
26 | #define HASH_BUCKETS 4096 | |
27 | ||
28 | static struct symbol *symtab[HASH_BUCKETS]; | |
ce560686 | 29 | static FILE *debugfile; |
1da177e4 LT |
30 | |
31 | int cur_line = 1; | |
ab37d5a4 | 32 | char *cur_filename; |
2c5925d6 | 33 | int in_source_file; |
1da177e4 | 34 | |
64e6c1e1 | 35 | static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types, |
7b453719 | 36 | flag_preserve, flag_warnings; |
1da177e4 LT |
37 | |
38 | static int errors; | |
39 | static int nsyms; | |
40 | ||
41 | static struct symbol *expansion_trail; | |
15fde675 | 42 | static struct symbol *visited_symbols; |
1da177e4 | 43 | |
7ec8eda1 MM |
44 | static const struct { |
45 | int n; | |
46 | const char *name; | |
47 | } symbol_types[] = { | |
48 | [SYM_NORMAL] = { 0, NULL}, | |
49 | [SYM_TYPEDEF] = {'t', "typedef"}, | |
50 | [SYM_ENUM] = {'e', "enum"}, | |
51 | [SYM_STRUCT] = {'s', "struct"}, | |
52 | [SYM_UNION] = {'u', "union"}, | |
e37ddb82 | 53 | [SYM_ENUM_CONST] = {'E', "enum constant"}, |
1da177e4 LT |
54 | }; |
55 | ||
ce560686 SR |
56 | static int equal_list(struct string_list *a, struct string_list *b); |
57 | static void print_list(FILE * f, struct string_list *list); | |
68eb8563 MM |
58 | static struct string_list *concat_list(struct string_list *start, ...); |
59 | static struct string_list *mk_node(const char *string); | |
64e6c1e1 AG |
60 | static void print_location(void); |
61 | static void print_type_name(enum symbol_type type, const char *name); | |
ce560686 | 62 | |
1da177e4 LT |
63 | /*----------------------------------------------------------------------*/ |
64 | ||
78c04153 SR |
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 | |
1da177e4 LT |
118 | }; |
119 | ||
ce560686 | 120 | static unsigned long partial_crc32_one(unsigned char c, unsigned long crc) |
1da177e4 | 121 | { |
78c04153 | 122 | return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8); |
1da177e4 LT |
123 | } |
124 | ||
ce560686 | 125 | static unsigned long partial_crc32(const char *s, unsigned long crc) |
1da177e4 | 126 | { |
78c04153 SR |
127 | while (*s) |
128 | crc = partial_crc32_one(*s++, crc); | |
129 | return crc; | |
1da177e4 LT |
130 | } |
131 | ||
ce560686 | 132 | static unsigned long crc32(const char *s) |
1da177e4 | 133 | { |
78c04153 | 134 | return partial_crc32(s, 0xffffffff) ^ 0xffffffff; |
1da177e4 LT |
135 | } |
136 | ||
1da177e4 LT |
137 | /*----------------------------------------------------------------------*/ |
138 | ||
ce560686 | 139 | static enum symbol_type map_to_ns(enum symbol_type t) |
1da177e4 | 140 | { |
e37ddb82 MM |
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 | } | |
78c04153 | 151 | return t; |
1da177e4 LT |
152 | } |
153 | ||
01762c4e | 154 | struct symbol *find_symbol(const char *name, enum symbol_type ns, int exact) |
1da177e4 | 155 | { |
78c04153 SR |
156 | unsigned long h = crc32(name) % HASH_BUCKETS; |
157 | struct symbol *sym; | |
1da177e4 | 158 | |
78c04153 | 159 | for (sym = symtab[h]; sym; sym = sym->hash_next) |
ce560686 | 160 | if (map_to_ns(sym->type) == map_to_ns(ns) && |
64e6c1e1 AG |
161 | strcmp(name, sym->name) == 0 && |
162 | sym->is_declared) | |
78c04153 | 163 | break; |
1da177e4 | 164 | |
01762c4e MM |
165 | if (exact && sym && sym->type != ns) |
166 | return NULL; | |
78c04153 | 167 | return sym; |
1da177e4 LT |
168 | } |
169 | ||
64e6c1e1 AG |
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(defn->string, "}") == 0 && | |
179 | (defn = defn->next) && defn->tag == SYM_NORMAL && | |
180 | strcmp(defn->string, "UNKNOWN") == 0 && | |
181 | (defn = defn->next) && defn->tag == SYM_NORMAL && | |
182 | strcmp(defn->string, "{") == 0); | |
183 | } | |
184 | ||
b7ed698c | 185 | static struct symbol *__add_symbol(const char *name, enum symbol_type type, |
64e6c1e1 AG |
186 | struct string_list *defn, int is_extern, |
187 | int is_reference) | |
1da177e4 | 188 | { |
e37ddb82 | 189 | unsigned long h; |
78c04153 | 190 | struct symbol *sym; |
64e6c1e1 | 191 | enum symbol_status status = STATUS_UNCHANGED; |
e37ddb82 MM |
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(last_enum_expr, NULL); | |
202 | last_enum_expr = copy_list_range(defn, NULL); | |
203 | enum_counter = 1; | |
204 | } else { | |
205 | struct string_list *expr; | |
206 | char buf[20]; | |
207 | ||
208 | snprintf(buf, sizeof(buf), "%d", enum_counter++); | |
209 | if (last_enum_expr) { | |
210 | expr = copy_list_range(last_enum_expr, NULL); | |
211 | defn = concat_list(mk_node("("), | |
212 | expr, | |
213 | mk_node(")"), | |
214 | mk_node("+"), | |
215 | mk_node(buf), NULL); | |
216 | } else { | |
217 | defn = mk_node(buf); | |
218 | } | |
219 | } | |
220 | } else if (type == SYM_ENUM) { | |
221 | free_list(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 | } | |
78c04153 | 228 | |
e37ddb82 | 229 | h = crc32(name) % HASH_BUCKETS; |
ce560686 | 230 | for (sym = symtab[h]; sym; sym = sym->hash_next) { |
64e6c1e1 AG |
231 | if (map_to_ns(sym->type) == map_to_ns(type) && |
232 | strcmp(name, sym->name) == 0) { | |
233 | if (is_reference) | |
234 | /* fall through */ ; | |
235 | else if (sym->type == type && | |
236 | equal_list(sym->defn, defn)) { | |
5dae9a55 AG |
237 | if (!sym->is_declared && sym->is_override) { |
238 | print_location(); | |
239 | print_type_name(type, name); | |
240 | fprintf(stderr, " modversion is " | |
241 | "unchanged\n"); | |
242 | } | |
64e6c1e1 AG |
243 | sym->is_declared = 1; |
244 | return sym; | |
245 | } else if (!sym->is_declared) { | |
5dae9a55 AG |
246 | if (sym->is_override && flag_preserve) { |
247 | print_location(); | |
248 | fprintf(stderr, "ignoring "); | |
249 | print_type_name(type, name); | |
250 | fprintf(stderr, " 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 | } | |
64e6c1e1 | 257 | } else { |
78c04153 | 258 | error_with_pos("redefinition of %s", name); |
64e6c1e1 AG |
259 | return sym; |
260 | } | |
261 | break; | |
78c04153 | 262 | } |
ce560686 | 263 | } |
78c04153 | 264 | |
64e6c1e1 AG |
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 | ||
78c04153 SR |
277 | sym = xmalloc(sizeof(*sym)); |
278 | sym->name = name; | |
279 | sym->type = type; | |
280 | sym->defn = defn; | |
281 | sym->expansion_trail = NULL; | |
15fde675 | 282 | sym->visited = NULL; |
78c04153 SR |
283 | sym->is_extern = is_extern; |
284 | ||
285 | sym->hash_next = symtab[h]; | |
286 | symtab[h] = sym; | |
287 | ||
64e6c1e1 AG |
288 | sym->is_declared = !is_reference; |
289 | sym->status = status; | |
5dae9a55 | 290 | sym->is_override = 0; |
64e6c1e1 | 291 | |
78c04153 | 292 | if (flag_debug) { |
7ec8eda1 MM |
293 | if (symbol_types[type].name) |
294 | fprintf(debugfile, "Defn for %s %s == <", | |
295 | symbol_types[type].name, name); | |
296 | else | |
297 | fprintf(debugfile, "Defn for type%d %s == <", | |
298 | type, name); | |
78c04153 SR |
299 | if (is_extern) |
300 | fputs("extern ", debugfile); | |
301 | print_list(debugfile, defn); | |
302 | fputs(">\n", debugfile); | |
303 | } | |
304 | ||
305 | ++nsyms; | |
1da177e4 | 306 | return sym; |
1da177e4 LT |
307 | } |
308 | ||
64e6c1e1 AG |
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, 0); | |
313 | } | |
314 | ||
b7ed698c | 315 | static struct symbol *add_reference_symbol(const char *name, enum symbol_type type, |
64e6c1e1 AG |
316 | struct string_list *defn, int is_extern) |
317 | { | |
318 | return __add_symbol(name, type, defn, is_extern, 1); | |
319 | } | |
320 | ||
1da177e4 LT |
321 | /*----------------------------------------------------------------------*/ |
322 | ||
ce560686 | 323 | void free_node(struct string_list *node) |
1da177e4 | 324 | { |
78c04153 SR |
325 | free(node->string); |
326 | free(node); | |
1da177e4 LT |
327 | } |
328 | ||
78c04153 | 329 | void free_list(struct string_list *s, struct string_list *e) |
1da177e4 | 330 | { |
78c04153 SR |
331 | while (s != e) { |
332 | struct string_list *next = s->next; | |
333 | free_node(s); | |
334 | s = next; | |
335 | } | |
1da177e4 LT |
336 | } |
337 | ||
68eb8563 MM |
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 | ||
ce560686 | 367 | struct string_list *copy_node(struct string_list *node) |
1da177e4 | 368 | { |
78c04153 | 369 | struct string_list *newnode; |
1da177e4 | 370 | |
78c04153 SR |
371 | newnode = xmalloc(sizeof(*newnode)); |
372 | newnode->string = xstrdup(node->string); | |
373 | newnode->tag = node->tag; | |
1da177e4 | 374 | |
78c04153 | 375 | return newnode; |
1da177e4 LT |
376 | } |
377 | ||
e37ddb82 MM |
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(start); | |
386 | for (start = start->next; start != end; start = start->next) { | |
387 | n->next = copy_node(start); | |
388 | n = n->next; | |
389 | } | |
390 | n->next = NULL; | |
391 | return res; | |
392 | } | |
393 | ||
ce560686 | 394 | static int equal_list(struct string_list *a, struct string_list *b) |
1da177e4 | 395 | { |
78c04153 SR |
396 | while (a && b) { |
397 | if (a->tag != b->tag || strcmp(a->string, b->string)) | |
398 | return 0; | |
399 | a = a->next; | |
400 | b = b->next; | |
401 | } | |
1da177e4 | 402 | |
78c04153 | 403 | return !a && !b; |
1da177e4 LT |
404 | } |
405 | ||
64e6c1e1 AG |
406 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) |
407 | ||
b7ed698c | 408 | static struct string_list *read_node(FILE *f) |
64e6c1e1 AG |
409 | { |
410 | char buffer[256]; | |
411 | struct string_list node = { | |
412 | .string = buffer, | |
413 | .tag = SYM_NORMAL }; | |
a78f70e8 | 414 | int c, in_string = 0; |
64e6c1e1 AG |
415 | |
416 | while ((c = fgetc(f)) != EOF) { | |
a78f70e8 | 417 | if (!in_string && c == ' ') { |
64e6c1e1 AG |
418 | if (node.string == buffer) |
419 | continue; | |
420 | break; | |
a78f70e8 MM |
421 | } else if (c == '"') { |
422 | in_string = !in_string; | |
64e6c1e1 AG |
423 | } else if (c == '\n') { |
424 | if (node.string == buffer) | |
425 | return NULL; | |
426 | ungetc(c, f); | |
427 | break; | |
428 | } | |
429 | if (node.string >= buffer + sizeof(buffer) - 1) { | |
430 | fprintf(stderr, "Token too long\n"); | |
431 | exit(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] == '#') { | |
1ae14703 | 441 | size_t n; |
64e6c1e1 | 442 | |
7ec8eda1 MM |
443 | for (n = 0; n < ARRAY_SIZE(symbol_types); n++) { |
444 | if (node.string[0] == symbol_types[n].n) { | |
64e6c1e1 AG |
445 | node.tag = n; |
446 | node.string += 2; | |
447 | return copy_node(&node); | |
448 | } | |
449 | } | |
450 | fprintf(stderr, "Unknown type %c\n", node.string[0]); | |
451 | exit(1); | |
452 | } | |
453 | return copy_node(&node); | |
454 | } | |
455 | ||
456 | static void read_reference(FILE *f) | |
457 | { | |
458 | while (!feof(f)) { | |
459 | struct string_list *defn = NULL; | |
460 | struct string_list *sym, *def; | |
5dae9a55 AG |
461 | int is_extern = 0, is_override = 0; |
462 | struct symbol *subsym; | |
64e6c1e1 AG |
463 | |
464 | sym = read_node(f); | |
5dae9a55 AG |
465 | if (sym && sym->tag == SYM_NORMAL && |
466 | !strcmp(sym->string, "override")) { | |
467 | is_override = 1; | |
468 | free_node(sym); | |
469 | sym = read_node(f); | |
470 | } | |
64e6c1e1 AG |
471 | if (!sym) |
472 | continue; | |
473 | def = read_node(f); | |
474 | if (def && def->tag == SYM_NORMAL && | |
475 | !strcmp(def->string, "extern")) { | |
476 | is_extern = 1; | |
477 | free_node(def); | |
478 | def = read_node(f); | |
479 | } | |
480 | while (def) { | |
481 | def->next = defn; | |
482 | defn = def; | |
483 | def = read_node(f); | |
484 | } | |
5dae9a55 | 485 | subsym = add_reference_symbol(xstrdup(sym->string), sym->tag, |
64e6c1e1 | 486 | defn, is_extern); |
5dae9a55 | 487 | subsym->is_override = is_override; |
64e6c1e1 AG |
488 | free_node(sym); |
489 | } | |
490 | } | |
491 | ||
ce560686 | 492 | static void print_node(FILE * f, struct string_list *list) |
1da177e4 | 493 | { |
7ec8eda1 MM |
494 | if (symbol_types[list->tag].n) { |
495 | putc(symbol_types[list->tag].n, f); | |
78c04153 | 496 | putc('#', f); |
78c04153 | 497 | } |
15fde675 | 498 | fputs(list->string, f); |
1da177e4 LT |
499 | } |
500 | ||
ce560686 | 501 | static void print_list(FILE * f, struct string_list *list) |
1da177e4 | 502 | { |
78c04153 SR |
503 | struct string_list **e, **b; |
504 | struct string_list *tmp, **tmp2; | |
505 | int elem = 1; | |
1da177e4 | 506 | |
78c04153 SR |
507 | if (list == NULL) { |
508 | fputs("(nil)", f); | |
509 | return; | |
510 | } | |
1da177e4 | 511 | |
78c04153 SR |
512 | tmp = list; |
513 | while ((tmp = tmp->next) != NULL) | |
514 | elem++; | |
1da177e4 | 515 | |
78c04153 SR |
516 | b = alloca(elem * sizeof(*e)); |
517 | e = b + elem; | |
518 | tmp2 = e - 1; | |
1da177e4 | 519 | |
78c04153 SR |
520 | (*tmp2--) = list; |
521 | while ((list = list->next) != NULL) | |
522 | *(tmp2--) = list; | |
1da177e4 | 523 | |
78c04153 SR |
524 | while (b != e) { |
525 | print_node(f, *b++); | |
526 | putc(' ', f); | |
527 | } | |
528 | } | |
1da177e4 | 529 | |
15fde675 | 530 | static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc) |
78c04153 | 531 | { |
15fde675 | 532 | struct string_list *list = sym->defn; |
78c04153 SR |
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(debugfile, "%s ", cur->string); | |
561 | crc = partial_crc32(cur->string, crc); | |
562 | crc = partial_crc32_one(' ', crc); | |
563 | break; | |
564 | ||
e37ddb82 | 565 | case SYM_ENUM_CONST: |
78c04153 | 566 | case SYM_TYPEDEF: |
01762c4e | 567 | subsym = find_symbol(cur->string, cur->tag, 0); |
64e6c1e1 | 568 | /* FIXME: Bad reference files can segfault here. */ |
78c04153 SR |
569 | if (subsym->expansion_trail) { |
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 | } else { | |
575 | subsym->expansion_trail = expansion_trail; | |
576 | expansion_trail = subsym; | |
15fde675 | 577 | crc = expand_and_crc_sym(subsym, crc); |
78c04153 SR |
578 | } |
579 | break; | |
580 | ||
581 | case SYM_STRUCT: | |
582 | case SYM_UNION: | |
583 | case SYM_ENUM: | |
01762c4e | 584 | subsym = find_symbol(cur->string, cur->tag, 0); |
78c04153 | 585 | if (!subsym) { |
68eb8563 | 586 | struct string_list *n; |
78c04153 SR |
587 | |
588 | error_with_pos("expand undefined %s %s", | |
7ec8eda1 | 589 | symbol_types[cur->tag].name, |
78c04153 | 590 | cur->string); |
68eb8563 MM |
591 | n = concat_list(mk_node |
592 | (symbol_types[cur->tag].name), | |
593 | mk_node(cur->string), | |
594 | mk_node("{"), | |
595 | mk_node("UNKNOWN"), | |
596 | mk_node("}"), NULL); | |
78c04153 SR |
597 | subsym = |
598 | add_symbol(cur->string, cur->tag, n, 0); | |
599 | } | |
600 | if (subsym->expansion_trail) { | |
601 | if (flag_dump_defs) { | |
602 | fprintf(debugfile, "%s %s ", | |
7ec8eda1 | 603 | symbol_types[cur->tag].name, |
78c04153 SR |
604 | cur->string); |
605 | } | |
606 | ||
7ec8eda1 | 607 | crc = partial_crc32(symbol_types[cur->tag].name, |
ce560686 | 608 | crc); |
78c04153 SR |
609 | crc = partial_crc32_one(' ', crc); |
610 | crc = partial_crc32(cur->string, crc); | |
611 | crc = partial_crc32_one(' ', crc); | |
612 | } else { | |
613 | subsym->expansion_trail = expansion_trail; | |
614 | expansion_trail = subsym; | |
15fde675 | 615 | crc = expand_and_crc_sym(subsym, crc); |
78c04153 SR |
616 | } |
617 | break; | |
1da177e4 | 618 | } |
1da177e4 | 619 | } |
1da177e4 | 620 | |
15fde675 AG |
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 | ||
78c04153 | 631 | return crc; |
1da177e4 LT |
632 | } |
633 | ||
78c04153 | 634 | void export_symbol(const char *name) |
1da177e4 | 635 | { |
78c04153 | 636 | struct symbol *sym; |
1da177e4 | 637 | |
01762c4e | 638 | sym = find_symbol(name, SYM_NORMAL, 0); |
78c04153 SR |
639 | if (!sym) |
640 | error_with_pos("export undefined symbol %s", name); | |
641 | else { | |
642 | unsigned long crc; | |
64e6c1e1 | 643 | int has_changed = 0; |
1da177e4 | 644 | |
78c04153 SR |
645 | if (flag_dump_defs) |
646 | fprintf(debugfile, "Export %s == <", name); | |
1da177e4 | 647 | |
78c04153 | 648 | expansion_trail = (struct symbol *)-1L; |
1da177e4 | 649 | |
64e6c1e1 AG |
650 | sym->expansion_trail = expansion_trail; |
651 | expansion_trail = sym; | |
15fde675 | 652 | crc = expand_and_crc_sym(sym, 0xffffffff) ^ 0xffffffff; |
1da177e4 | 653 | |
78c04153 SR |
654 | sym = expansion_trail; |
655 | while (sym != (struct symbol *)-1L) { | |
656 | struct symbol *n = sym->expansion_trail; | |
64e6c1e1 AG |
657 | |
658 | if (sym->status != STATUS_UNCHANGED) { | |
659 | if (!has_changed) { | |
660 | print_location(); | |
661 | fprintf(stderr, "%s: %s: modversion " | |
662 | "changed because of changes " | |
663 | "in ", flag_preserve ? "error" : | |
664 | "warning", name); | |
665 | } else | |
666 | fprintf(stderr, ", "); | |
667 | print_type_name(sym->type, sym->name); | |
668 | if (sym->status == STATUS_DEFINED) | |
669 | fprintf(stderr, " (became defined)"); | |
670 | has_changed = 1; | |
671 | if (flag_preserve) | |
672 | errors++; | |
673 | } | |
78c04153 SR |
674 | sym->expansion_trail = 0; |
675 | sym = n; | |
676 | } | |
64e6c1e1 AG |
677 | if (has_changed) |
678 | fprintf(stderr, "\n"); | |
1da177e4 | 679 | |
78c04153 SR |
680 | if (flag_dump_defs) |
681 | fputs(">\n", debugfile); | |
1da177e4 | 682 | |
7b453719 | 683 | printf("__crc_%s = 0x%08lx;\n", name, crc); |
78c04153 | 684 | } |
1da177e4 LT |
685 | } |
686 | ||
687 | /*----------------------------------------------------------------------*/ | |
64e6c1e1 AG |
688 | |
689 | static void print_location(void) | |
690 | { | |
691 | fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>", cur_line); | |
692 | } | |
693 | ||
694 | static void print_type_name(enum symbol_type type, const char *name) | |
695 | { | |
7ec8eda1 MM |
696 | if (symbol_types[type].name) |
697 | fprintf(stderr, "%s %s", symbol_types[type].name, name); | |
64e6c1e1 AG |
698 | else |
699 | fprintf(stderr, "%s", name); | |
700 | } | |
701 | ||
78c04153 | 702 | void error_with_pos(const char *fmt, ...) |
1da177e4 | 703 | { |
78c04153 | 704 | va_list args; |
1da177e4 | 705 | |
78c04153 | 706 | if (flag_warnings) { |
64e6c1e1 | 707 | print_location(); |
1da177e4 | 708 | |
78c04153 SR |
709 | va_start(args, fmt); |
710 | vfprintf(stderr, fmt, args); | |
711 | va_end(args); | |
712 | putc('\n', stderr); | |
1da177e4 | 713 | |
78c04153 SR |
714 | errors++; |
715 | } | |
1da177e4 LT |
716 | } |
717 | ||
ce560686 | 718 | static void genksyms_usage(void) |
1da177e4 | 719 | { |
56067812 | 720 | fputs("Usage:\n" "genksyms [-adDTwqhVR] > /path/to/.tmp_obj.ver\n" "\n" |
1da177e4 | 721 | #ifdef __GNU_LIBRARY__ |
d70f82ac | 722 | " -s, --symbol-prefix Select symbol prefix\n" |
1da177e4 LT |
723 | " -d, --debug Increment the debug level (repeatable)\n" |
724 | " -D, --dump Dump expanded symbol defs (for debugging only)\n" | |
64e6c1e1 AG |
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" | |
1da177e4 LT |
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" | |
78c04153 | 732 | #else /* __GNU_LIBRARY__ */ |
d70f82ac | 733 | " -s Select symbol prefix\n" |
78c04153 SR |
734 | " -d Increment the debug level (repeatable)\n" |
735 | " -D Dump expanded symbol defs (for debugging only)\n" | |
64e6c1e1 AG |
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" | |
78c04153 SR |
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__ */ | |
1da177e4 LT |
744 | , stderr); |
745 | } | |
746 | ||
78c04153 | 747 | int main(int argc, char **argv) |
1da177e4 | 748 | { |
64e6c1e1 | 749 | FILE *dumpfile = NULL, *ref_file = NULL; |
78c04153 | 750 | int o; |
1da177e4 LT |
751 | |
752 | #ifdef __GNU_LIBRARY__ | |
78c04153 | 753 | struct option long_opts[] = { |
78c04153 SR |
754 | {"debug", 0, 0, 'd'}, |
755 | {"warnings", 0, 0, 'w'}, | |
756 | {"quiet", 0, 0, 'q'}, | |
757 | {"dump", 0, 0, 'D'}, | |
64e6c1e1 | 758 | {"reference", 1, 0, 'r'}, |
15fde675 | 759 | {"dump-types", 1, 0, 'T'}, |
64e6c1e1 | 760 | {"preserve", 0, 0, 'p'}, |
78c04153 SR |
761 | {"version", 0, 0, 'V'}, |
762 | {"help", 0, 0, 'h'}, | |
763 | {0, 0, 0, 0} | |
764 | }; | |
765 | ||
7b453719 | 766 | while ((o = getopt_long(argc, argv, "s:dwqVDr:T:ph", |
78c04153 SR |
767 | &long_opts[0], NULL)) != EOF) |
768 | #else /* __GNU_LIBRARY__ */ | |
7b453719 | 769 | while ((o = getopt(argc, argv, "s:dwqVDr:T:ph")) != EOF) |
78c04153 SR |
770 | #endif /* __GNU_LIBRARY__ */ |
771 | switch (o) { | |
78c04153 SR |
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("genksyms version 2.5.60\n", stderr); | |
783 | break; | |
784 | case 'D': | |
785 | flag_dump_defs = 1; | |
786 | break; | |
64e6c1e1 AG |
787 | case 'r': |
788 | flag_reference = 1; | |
789 | ref_file = fopen(optarg, "r"); | |
790 | if (!ref_file) { | |
791 | perror(optarg); | |
792 | return 1; | |
793 | } | |
794 | break; | |
15fde675 AG |
795 | case 'T': |
796 | flag_dump_types = 1; | |
797 | dumpfile = fopen(optarg, "w"); | |
798 | if (!dumpfile) { | |
799 | perror(optarg); | |
800 | return 1; | |
801 | } | |
802 | break; | |
64e6c1e1 AG |
803 | case 'p': |
804 | flag_preserve = 1; | |
805 | break; | |
78c04153 SR |
806 | case 'h': |
807 | genksyms_usage(); | |
808 | return 0; | |
809 | default: | |
810 | genksyms_usage(); | |
811 | return 1; | |
812 | } | |
78c04153 SR |
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 | ||
c64152bf | 824 | if (flag_reference) { |
64e6c1e1 | 825 | read_reference(ref_file); |
c64152bf AB |
826 | fclose(ref_file); |
827 | } | |
64e6c1e1 | 828 | |
78c04153 SR |
829 | yyparse(); |
830 | ||
15fde675 AG |
831 | if (flag_dump_types && visited_symbols) { |
832 | while (visited_symbols != (struct symbol *)-1L) { | |
833 | struct symbol *sym = visited_symbols; | |
834 | ||
5dae9a55 AG |
835 | if (sym->is_override) |
836 | fputs("override ", dumpfile); | |
7ec8eda1 MM |
837 | if (symbol_types[sym->type].n) { |
838 | putc(symbol_types[sym->type].n, dumpfile); | |
15fde675 AG |
839 | putc('#', dumpfile); |
840 | } | |
841 | fputs(sym->name, dumpfile); | |
842 | putc(' ', dumpfile); | |
3b40d381 AG |
843 | if (sym->is_extern) |
844 | fputs("extern ", dumpfile); | |
15fde675 AG |
845 | print_list(dumpfile, sym->defn); |
846 | putc('\n', dumpfile); | |
847 | ||
848 | visited_symbols = sym->visited; | |
849 | sym->visited = NULL; | |
850 | } | |
851 | } | |
852 | ||
78c04153 SR |
853 | if (flag_debug) { |
854 | fprintf(debugfile, "Hash table occupancy %d/%d = %g\n", | |
855 | nsyms, HASH_BUCKETS, | |
856 | (double)nsyms / (double)HASH_BUCKETS); | |
857 | } | |
858 | ||
4deaaa4d MZ |
859 | if (dumpfile) |
860 | fclose(dumpfile); | |
861 | ||
78c04153 | 862 | return errors != 0; |
1da177e4 | 863 | } |