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Commit | Line | Data |
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1da177e4 LT |
1 | /* Generate kernel symbol version hashes. |
2 | Copyright 1996, 1997 Linux International. | |
3 | ||
4 | New implementation contributed by Richard Henderson <rth@tamu.edu> | |
5 | Based on original work by Bjorn Ekwall <bj0rn@blox.se> | |
6 | ||
7 | This file was part of the Linux modutils 2.4.22: moved back into the | |
8 | kernel sources by Rusty Russell/Kai Germaschewski. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify it | |
11 | under the terms of the GNU General Public License as published by the | |
12 | Free Software Foundation; either version 2 of the License, or (at your | |
13 | option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software Foundation, | |
22 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
23 | ||
24 | #include <stdio.h> | |
25 | #include <string.h> | |
26 | #include <stdlib.h> | |
27 | #include <unistd.h> | |
28 | #include <assert.h> | |
29 | #include <stdarg.h> | |
30 | #ifdef __GNU_LIBRARY__ | |
31 | #include <getopt.h> | |
78c04153 | 32 | #endif /* __GNU_LIBRARY__ */ |
1da177e4 LT |
33 | |
34 | #include "genksyms.h" | |
1da177e4 LT |
35 | /*----------------------------------------------------------------------*/ |
36 | ||
37 | #define HASH_BUCKETS 4096 | |
38 | ||
39 | static struct symbol *symtab[HASH_BUCKETS]; | |
ce560686 | 40 | static FILE *debugfile; |
1da177e4 LT |
41 | |
42 | int cur_line = 1; | |
ce560686 | 43 | char *cur_filename; |
1da177e4 | 44 | |
64e6c1e1 | 45 | static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types, |
2ea03891 | 46 | flag_preserve, flag_warnings; |
ce560686 SR |
47 | static const char *arch = ""; |
48 | static const char *mod_prefix = ""; | |
1da177e4 LT |
49 | |
50 | static int errors; | |
51 | static int nsyms; | |
52 | ||
53 | static struct symbol *expansion_trail; | |
15fde675 | 54 | static struct symbol *visited_symbols; |
1da177e4 | 55 | |
7ec8eda1 MM |
56 | static 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"}, | |
1da177e4 LT |
65 | }; |
66 | ||
ce560686 SR |
67 | static int equal_list(struct string_list *a, struct string_list *b); |
68 | static void print_list(FILE * f, struct string_list *list); | |
64e6c1e1 AG |
69 | static void print_location(void); |
70 | static void print_type_name(enum symbol_type type, const char *name); | |
ce560686 | 71 | |
1da177e4 LT |
72 | /*----------------------------------------------------------------------*/ |
73 | ||
78c04153 SR |
74 | static const unsigned int crctab32[] = { |
75 | 0x00000000U, 0x77073096U, 0xee0e612cU, 0x990951baU, 0x076dc419U, | |
76 | 0x706af48fU, 0xe963a535U, 0x9e6495a3U, 0x0edb8832U, 0x79dcb8a4U, | |
77 | 0xe0d5e91eU, 0x97d2d988U, 0x09b64c2bU, 0x7eb17cbdU, 0xe7b82d07U, | |
78 | 0x90bf1d91U, 0x1db71064U, 0x6ab020f2U, 0xf3b97148U, 0x84be41deU, | |
79 | 0x1adad47dU, 0x6ddde4ebU, 0xf4d4b551U, 0x83d385c7U, 0x136c9856U, | |
80 | 0x646ba8c0U, 0xfd62f97aU, 0x8a65c9ecU, 0x14015c4fU, 0x63066cd9U, | |
81 | 0xfa0f3d63U, 0x8d080df5U, 0x3b6e20c8U, 0x4c69105eU, 0xd56041e4U, | |
82 | 0xa2677172U, 0x3c03e4d1U, 0x4b04d447U, 0xd20d85fdU, 0xa50ab56bU, | |
83 | 0x35b5a8faU, 0x42b2986cU, 0xdbbbc9d6U, 0xacbcf940U, 0x32d86ce3U, | |
84 | 0x45df5c75U, 0xdcd60dcfU, 0xabd13d59U, 0x26d930acU, 0x51de003aU, | |
85 | 0xc8d75180U, 0xbfd06116U, 0x21b4f4b5U, 0x56b3c423U, 0xcfba9599U, | |
86 | 0xb8bda50fU, 0x2802b89eU, 0x5f058808U, 0xc60cd9b2U, 0xb10be924U, | |
87 | 0x2f6f7c87U, 0x58684c11U, 0xc1611dabU, 0xb6662d3dU, 0x76dc4190U, | |
88 | 0x01db7106U, 0x98d220bcU, 0xefd5102aU, 0x71b18589U, 0x06b6b51fU, | |
89 | 0x9fbfe4a5U, 0xe8b8d433U, 0x7807c9a2U, 0x0f00f934U, 0x9609a88eU, | |
90 | 0xe10e9818U, 0x7f6a0dbbU, 0x086d3d2dU, 0x91646c97U, 0xe6635c01U, | |
91 | 0x6b6b51f4U, 0x1c6c6162U, 0x856530d8U, 0xf262004eU, 0x6c0695edU, | |
92 | 0x1b01a57bU, 0x8208f4c1U, 0xf50fc457U, 0x65b0d9c6U, 0x12b7e950U, | |
93 | 0x8bbeb8eaU, 0xfcb9887cU, 0x62dd1ddfU, 0x15da2d49U, 0x8cd37cf3U, | |
94 | 0xfbd44c65U, 0x4db26158U, 0x3ab551ceU, 0xa3bc0074U, 0xd4bb30e2U, | |
95 | 0x4adfa541U, 0x3dd895d7U, 0xa4d1c46dU, 0xd3d6f4fbU, 0x4369e96aU, | |
96 | 0x346ed9fcU, 0xad678846U, 0xda60b8d0U, 0x44042d73U, 0x33031de5U, | |
97 | 0xaa0a4c5fU, 0xdd0d7cc9U, 0x5005713cU, 0x270241aaU, 0xbe0b1010U, | |
98 | 0xc90c2086U, 0x5768b525U, 0x206f85b3U, 0xb966d409U, 0xce61e49fU, | |
99 | 0x5edef90eU, 0x29d9c998U, 0xb0d09822U, 0xc7d7a8b4U, 0x59b33d17U, | |
100 | 0x2eb40d81U, 0xb7bd5c3bU, 0xc0ba6cadU, 0xedb88320U, 0x9abfb3b6U, | |
101 | 0x03b6e20cU, 0x74b1d29aU, 0xead54739U, 0x9dd277afU, 0x04db2615U, | |
102 | 0x73dc1683U, 0xe3630b12U, 0x94643b84U, 0x0d6d6a3eU, 0x7a6a5aa8U, | |
103 | 0xe40ecf0bU, 0x9309ff9dU, 0x0a00ae27U, 0x7d079eb1U, 0xf00f9344U, | |
104 | 0x8708a3d2U, 0x1e01f268U, 0x6906c2feU, 0xf762575dU, 0x806567cbU, | |
105 | 0x196c3671U, 0x6e6b06e7U, 0xfed41b76U, 0x89d32be0U, 0x10da7a5aU, | |
106 | 0x67dd4accU, 0xf9b9df6fU, 0x8ebeeff9U, 0x17b7be43U, 0x60b08ed5U, | |
107 | 0xd6d6a3e8U, 0xa1d1937eU, 0x38d8c2c4U, 0x4fdff252U, 0xd1bb67f1U, | |
108 | 0xa6bc5767U, 0x3fb506ddU, 0x48b2364bU, 0xd80d2bdaU, 0xaf0a1b4cU, | |
109 | 0x36034af6U, 0x41047a60U, 0xdf60efc3U, 0xa867df55U, 0x316e8eefU, | |
110 | 0x4669be79U, 0xcb61b38cU, 0xbc66831aU, 0x256fd2a0U, 0x5268e236U, | |
111 | 0xcc0c7795U, 0xbb0b4703U, 0x220216b9U, 0x5505262fU, 0xc5ba3bbeU, | |
112 | 0xb2bd0b28U, 0x2bb45a92U, 0x5cb36a04U, 0xc2d7ffa7U, 0xb5d0cf31U, | |
113 | 0x2cd99e8bU, 0x5bdeae1dU, 0x9b64c2b0U, 0xec63f226U, 0x756aa39cU, | |
114 | 0x026d930aU, 0x9c0906a9U, 0xeb0e363fU, 0x72076785U, 0x05005713U, | |
115 | 0x95bf4a82U, 0xe2b87a14U, 0x7bb12baeU, 0x0cb61b38U, 0x92d28e9bU, | |
116 | 0xe5d5be0dU, 0x7cdcefb7U, 0x0bdbdf21U, 0x86d3d2d4U, 0xf1d4e242U, | |
117 | 0x68ddb3f8U, 0x1fda836eU, 0x81be16cdU, 0xf6b9265bU, 0x6fb077e1U, | |
118 | 0x18b74777U, 0x88085ae6U, 0xff0f6a70U, 0x66063bcaU, 0x11010b5cU, | |
119 | 0x8f659effU, 0xf862ae69U, 0x616bffd3U, 0x166ccf45U, 0xa00ae278U, | |
120 | 0xd70dd2eeU, 0x4e048354U, 0x3903b3c2U, 0xa7672661U, 0xd06016f7U, | |
121 | 0x4969474dU, 0x3e6e77dbU, 0xaed16a4aU, 0xd9d65adcU, 0x40df0b66U, | |
122 | 0x37d83bf0U, 0xa9bcae53U, 0xdebb9ec5U, 0x47b2cf7fU, 0x30b5ffe9U, | |
123 | 0xbdbdf21cU, 0xcabac28aU, 0x53b39330U, 0x24b4a3a6U, 0xbad03605U, | |
124 | 0xcdd70693U, 0x54de5729U, 0x23d967bfU, 0xb3667a2eU, 0xc4614ab8U, | |
125 | 0x5d681b02U, 0x2a6f2b94U, 0xb40bbe37U, 0xc30c8ea1U, 0x5a05df1bU, | |
126 | 0x2d02ef8dU | |
1da177e4 LT |
127 | }; |
128 | ||
ce560686 | 129 | static unsigned long partial_crc32_one(unsigned char c, unsigned long crc) |
1da177e4 | 130 | { |
78c04153 | 131 | return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8); |
1da177e4 LT |
132 | } |
133 | ||
ce560686 | 134 | static unsigned long partial_crc32(const char *s, unsigned long crc) |
1da177e4 | 135 | { |
78c04153 SR |
136 | while (*s) |
137 | crc = partial_crc32_one(*s++, crc); | |
138 | return crc; | |
1da177e4 LT |
139 | } |
140 | ||
ce560686 | 141 | static unsigned long crc32(const char *s) |
1da177e4 | 142 | { |
78c04153 | 143 | return partial_crc32(s, 0xffffffff) ^ 0xffffffff; |
1da177e4 LT |
144 | } |
145 | ||
1da177e4 LT |
146 | /*----------------------------------------------------------------------*/ |
147 | ||
ce560686 | 148 | static enum symbol_type map_to_ns(enum symbol_type t) |
1da177e4 | 149 | { |
78c04153 SR |
150 | if (t == SYM_TYPEDEF) |
151 | t = SYM_NORMAL; | |
152 | else if (t == SYM_UNION) | |
153 | t = SYM_STRUCT; | |
154 | return t; | |
1da177e4 LT |
155 | } |
156 | ||
78c04153 | 157 | struct symbol *find_symbol(const char *name, enum symbol_type ns) |
1da177e4 | 158 | { |
78c04153 SR |
159 | unsigned long h = crc32(name) % HASH_BUCKETS; |
160 | struct symbol *sym; | |
1da177e4 | 161 | |
78c04153 | 162 | for (sym = symtab[h]; sym; sym = sym->hash_next) |
ce560686 | 163 | if (map_to_ns(sym->type) == map_to_ns(ns) && |
64e6c1e1 AG |
164 | strcmp(name, sym->name) == 0 && |
165 | sym->is_declared) | |
78c04153 | 166 | break; |
1da177e4 | 167 | |
78c04153 | 168 | return sym; |
1da177e4 LT |
169 | } |
170 | ||
64e6c1e1 AG |
171 | static int is_unknown_symbol(struct symbol *sym) |
172 | { | |
173 | struct string_list *defn; | |
174 | ||
175 | return ((sym->type == SYM_STRUCT || | |
176 | sym->type == SYM_UNION || | |
177 | sym->type == SYM_ENUM) && | |
178 | (defn = sym->defn) && defn->tag == SYM_NORMAL && | |
179 | strcmp(defn->string, "}") == 0 && | |
180 | (defn = defn->next) && defn->tag == SYM_NORMAL && | |
181 | strcmp(defn->string, "UNKNOWN") == 0 && | |
182 | (defn = defn->next) && defn->tag == SYM_NORMAL && | |
183 | strcmp(defn->string, "{") == 0); | |
184 | } | |
185 | ||
b7ed698c | 186 | static struct symbol *__add_symbol(const char *name, enum symbol_type type, |
64e6c1e1 AG |
187 | struct string_list *defn, int is_extern, |
188 | int is_reference) | |
1da177e4 | 189 | { |
78c04153 SR |
190 | unsigned long h = crc32(name) % HASH_BUCKETS; |
191 | struct symbol *sym; | |
64e6c1e1 | 192 | enum symbol_status status = STATUS_UNCHANGED; |
78c04153 | 193 | |
ce560686 | 194 | for (sym = symtab[h]; sym; sym = sym->hash_next) { |
64e6c1e1 AG |
195 | if (map_to_ns(sym->type) == map_to_ns(type) && |
196 | strcmp(name, sym->name) == 0) { | |
197 | if (is_reference) | |
198 | /* fall through */ ; | |
199 | else if (sym->type == type && | |
200 | equal_list(sym->defn, defn)) { | |
5dae9a55 AG |
201 | if (!sym->is_declared && sym->is_override) { |
202 | print_location(); | |
203 | print_type_name(type, name); | |
204 | fprintf(stderr, " modversion is " | |
205 | "unchanged\n"); | |
206 | } | |
64e6c1e1 AG |
207 | sym->is_declared = 1; |
208 | return sym; | |
209 | } else if (!sym->is_declared) { | |
5dae9a55 AG |
210 | if (sym->is_override && flag_preserve) { |
211 | print_location(); | |
212 | fprintf(stderr, "ignoring "); | |
213 | print_type_name(type, name); | |
214 | fprintf(stderr, " modversion change\n"); | |
215 | sym->is_declared = 1; | |
216 | return sym; | |
217 | } else { | |
218 | status = is_unknown_symbol(sym) ? | |
219 | STATUS_DEFINED : STATUS_MODIFIED; | |
220 | } | |
64e6c1e1 | 221 | } else { |
78c04153 | 222 | error_with_pos("redefinition of %s", name); |
64e6c1e1 AG |
223 | return sym; |
224 | } | |
225 | break; | |
78c04153 | 226 | } |
ce560686 | 227 | } |
78c04153 | 228 | |
64e6c1e1 AG |
229 | if (sym) { |
230 | struct symbol **psym; | |
231 | ||
232 | for (psym = &symtab[h]; *psym; psym = &(*psym)->hash_next) { | |
233 | if (*psym == sym) { | |
234 | *psym = sym->hash_next; | |
235 | break; | |
236 | } | |
237 | } | |
238 | --nsyms; | |
239 | } | |
240 | ||
78c04153 SR |
241 | sym = xmalloc(sizeof(*sym)); |
242 | sym->name = name; | |
243 | sym->type = type; | |
244 | sym->defn = defn; | |
245 | sym->expansion_trail = NULL; | |
15fde675 | 246 | sym->visited = NULL; |
78c04153 SR |
247 | sym->is_extern = is_extern; |
248 | ||
249 | sym->hash_next = symtab[h]; | |
250 | symtab[h] = sym; | |
251 | ||
64e6c1e1 AG |
252 | sym->is_declared = !is_reference; |
253 | sym->status = status; | |
5dae9a55 | 254 | sym->is_override = 0; |
64e6c1e1 | 255 | |
78c04153 | 256 | if (flag_debug) { |
7ec8eda1 MM |
257 | if (symbol_types[type].name) |
258 | fprintf(debugfile, "Defn for %s %s == <", | |
259 | symbol_types[type].name, name); | |
260 | else | |
261 | fprintf(debugfile, "Defn for type%d %s == <", | |
262 | type, name); | |
78c04153 SR |
263 | if (is_extern) |
264 | fputs("extern ", debugfile); | |
265 | print_list(debugfile, defn); | |
266 | fputs(">\n", debugfile); | |
267 | } | |
268 | ||
269 | ++nsyms; | |
1da177e4 | 270 | return sym; |
1da177e4 LT |
271 | } |
272 | ||
64e6c1e1 AG |
273 | struct symbol *add_symbol(const char *name, enum symbol_type type, |
274 | struct string_list *defn, int is_extern) | |
275 | { | |
276 | return __add_symbol(name, type, defn, is_extern, 0); | |
277 | } | |
278 | ||
b7ed698c | 279 | static struct symbol *add_reference_symbol(const char *name, enum symbol_type type, |
64e6c1e1 AG |
280 | struct string_list *defn, int is_extern) |
281 | { | |
282 | return __add_symbol(name, type, defn, is_extern, 1); | |
283 | } | |
284 | ||
1da177e4 LT |
285 | /*----------------------------------------------------------------------*/ |
286 | ||
ce560686 | 287 | void free_node(struct string_list *node) |
1da177e4 | 288 | { |
78c04153 SR |
289 | free(node->string); |
290 | free(node); | |
1da177e4 LT |
291 | } |
292 | ||
78c04153 | 293 | void free_list(struct string_list *s, struct string_list *e) |
1da177e4 | 294 | { |
78c04153 SR |
295 | while (s != e) { |
296 | struct string_list *next = s->next; | |
297 | free_node(s); | |
298 | s = next; | |
299 | } | |
1da177e4 LT |
300 | } |
301 | ||
ce560686 | 302 | struct string_list *copy_node(struct string_list *node) |
1da177e4 | 303 | { |
78c04153 | 304 | struct string_list *newnode; |
1da177e4 | 305 | |
78c04153 SR |
306 | newnode = xmalloc(sizeof(*newnode)); |
307 | newnode->string = xstrdup(node->string); | |
308 | newnode->tag = node->tag; | |
1da177e4 | 309 | |
78c04153 | 310 | return newnode; |
1da177e4 LT |
311 | } |
312 | ||
ce560686 | 313 | static int equal_list(struct string_list *a, struct string_list *b) |
1da177e4 | 314 | { |
78c04153 SR |
315 | while (a && b) { |
316 | if (a->tag != b->tag || strcmp(a->string, b->string)) | |
317 | return 0; | |
318 | a = a->next; | |
319 | b = b->next; | |
320 | } | |
1da177e4 | 321 | |
78c04153 | 322 | return !a && !b; |
1da177e4 LT |
323 | } |
324 | ||
64e6c1e1 AG |
325 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) |
326 | ||
b7ed698c | 327 | static struct string_list *read_node(FILE *f) |
64e6c1e1 AG |
328 | { |
329 | char buffer[256]; | |
330 | struct string_list node = { | |
331 | .string = buffer, | |
332 | .tag = SYM_NORMAL }; | |
333 | int c; | |
334 | ||
335 | while ((c = fgetc(f)) != EOF) { | |
336 | if (c == ' ') { | |
337 | if (node.string == buffer) | |
338 | continue; | |
339 | break; | |
340 | } else if (c == '\n') { | |
341 | if (node.string == buffer) | |
342 | return NULL; | |
343 | ungetc(c, f); | |
344 | break; | |
345 | } | |
346 | if (node.string >= buffer + sizeof(buffer) - 1) { | |
347 | fprintf(stderr, "Token too long\n"); | |
348 | exit(1); | |
349 | } | |
350 | *node.string++ = c; | |
351 | } | |
352 | if (node.string == buffer) | |
353 | return NULL; | |
354 | *node.string = 0; | |
355 | node.string = buffer; | |
356 | ||
357 | if (node.string[1] == '#') { | |
358 | int n; | |
359 | ||
7ec8eda1 MM |
360 | for (n = 0; n < ARRAY_SIZE(symbol_types); n++) { |
361 | if (node.string[0] == symbol_types[n].n) { | |
64e6c1e1 AG |
362 | node.tag = n; |
363 | node.string += 2; | |
364 | return copy_node(&node); | |
365 | } | |
366 | } | |
367 | fprintf(stderr, "Unknown type %c\n", node.string[0]); | |
368 | exit(1); | |
369 | } | |
370 | return copy_node(&node); | |
371 | } | |
372 | ||
373 | static void read_reference(FILE *f) | |
374 | { | |
375 | while (!feof(f)) { | |
376 | struct string_list *defn = NULL; | |
377 | struct string_list *sym, *def; | |
5dae9a55 AG |
378 | int is_extern = 0, is_override = 0; |
379 | struct symbol *subsym; | |
64e6c1e1 AG |
380 | |
381 | sym = read_node(f); | |
5dae9a55 AG |
382 | if (sym && sym->tag == SYM_NORMAL && |
383 | !strcmp(sym->string, "override")) { | |
384 | is_override = 1; | |
385 | free_node(sym); | |
386 | sym = read_node(f); | |
387 | } | |
64e6c1e1 AG |
388 | if (!sym) |
389 | continue; | |
390 | def = read_node(f); | |
391 | if (def && def->tag == SYM_NORMAL && | |
392 | !strcmp(def->string, "extern")) { | |
393 | is_extern = 1; | |
394 | free_node(def); | |
395 | def = read_node(f); | |
396 | } | |
397 | while (def) { | |
398 | def->next = defn; | |
399 | defn = def; | |
400 | def = read_node(f); | |
401 | } | |
5dae9a55 | 402 | subsym = add_reference_symbol(xstrdup(sym->string), sym->tag, |
64e6c1e1 | 403 | defn, is_extern); |
5dae9a55 | 404 | subsym->is_override = is_override; |
64e6c1e1 AG |
405 | free_node(sym); |
406 | } | |
407 | } | |
408 | ||
ce560686 | 409 | static void print_node(FILE * f, struct string_list *list) |
1da177e4 | 410 | { |
7ec8eda1 MM |
411 | if (symbol_types[list->tag].n) { |
412 | putc(symbol_types[list->tag].n, f); | |
78c04153 | 413 | putc('#', f); |
78c04153 | 414 | } |
15fde675 | 415 | fputs(list->string, f); |
1da177e4 LT |
416 | } |
417 | ||
ce560686 | 418 | static void print_list(FILE * f, struct string_list *list) |
1da177e4 | 419 | { |
78c04153 SR |
420 | struct string_list **e, **b; |
421 | struct string_list *tmp, **tmp2; | |
422 | int elem = 1; | |
1da177e4 | 423 | |
78c04153 SR |
424 | if (list == NULL) { |
425 | fputs("(nil)", f); | |
426 | return; | |
427 | } | |
1da177e4 | 428 | |
78c04153 SR |
429 | tmp = list; |
430 | while ((tmp = tmp->next) != NULL) | |
431 | elem++; | |
1da177e4 | 432 | |
78c04153 SR |
433 | b = alloca(elem * sizeof(*e)); |
434 | e = b + elem; | |
435 | tmp2 = e - 1; | |
1da177e4 | 436 | |
78c04153 SR |
437 | (*tmp2--) = list; |
438 | while ((list = list->next) != NULL) | |
439 | *(tmp2--) = list; | |
1da177e4 | 440 | |
78c04153 SR |
441 | while (b != e) { |
442 | print_node(f, *b++); | |
443 | putc(' ', f); | |
444 | } | |
445 | } | |
1da177e4 | 446 | |
15fde675 | 447 | static unsigned long expand_and_crc_sym(struct symbol *sym, unsigned long crc) |
78c04153 | 448 | { |
15fde675 | 449 | struct string_list *list = sym->defn; |
78c04153 SR |
450 | struct string_list **e, **b; |
451 | struct string_list *tmp, **tmp2; | |
452 | int elem = 1; | |
453 | ||
454 | if (!list) | |
455 | return crc; | |
456 | ||
457 | tmp = list; | |
458 | while ((tmp = tmp->next) != NULL) | |
459 | elem++; | |
460 | ||
461 | b = alloca(elem * sizeof(*e)); | |
462 | e = b + elem; | |
463 | tmp2 = e - 1; | |
464 | ||
465 | *(tmp2--) = list; | |
466 | while ((list = list->next) != NULL) | |
467 | *(tmp2--) = list; | |
468 | ||
469 | while (b != e) { | |
470 | struct string_list *cur; | |
471 | struct symbol *subsym; | |
472 | ||
473 | cur = *(b++); | |
474 | switch (cur->tag) { | |
475 | case SYM_NORMAL: | |
476 | if (flag_dump_defs) | |
477 | fprintf(debugfile, "%s ", cur->string); | |
478 | crc = partial_crc32(cur->string, crc); | |
479 | crc = partial_crc32_one(' ', crc); | |
480 | break; | |
481 | ||
482 | case SYM_TYPEDEF: | |
483 | subsym = find_symbol(cur->string, cur->tag); | |
64e6c1e1 | 484 | /* FIXME: Bad reference files can segfault here. */ |
78c04153 SR |
485 | if (subsym->expansion_trail) { |
486 | if (flag_dump_defs) | |
487 | fprintf(debugfile, "%s ", cur->string); | |
488 | crc = partial_crc32(cur->string, crc); | |
489 | crc = partial_crc32_one(' ', crc); | |
490 | } else { | |
491 | subsym->expansion_trail = expansion_trail; | |
492 | expansion_trail = subsym; | |
15fde675 | 493 | crc = expand_and_crc_sym(subsym, crc); |
78c04153 SR |
494 | } |
495 | break; | |
496 | ||
497 | case SYM_STRUCT: | |
498 | case SYM_UNION: | |
499 | case SYM_ENUM: | |
500 | subsym = find_symbol(cur->string, cur->tag); | |
501 | if (!subsym) { | |
502 | struct string_list *n, *t = NULL; | |
503 | ||
504 | error_with_pos("expand undefined %s %s", | |
7ec8eda1 | 505 | symbol_types[cur->tag].name, |
78c04153 SR |
506 | cur->string); |
507 | ||
508 | n = xmalloc(sizeof(*n)); | |
7ec8eda1 | 509 | n->string = xstrdup(symbol_types[cur->tag].name); |
78c04153 SR |
510 | n->tag = SYM_NORMAL; |
511 | n->next = t; | |
512 | t = n; | |
513 | ||
514 | n = xmalloc(sizeof(*n)); | |
515 | n->string = xstrdup(cur->string); | |
516 | n->tag = SYM_NORMAL; | |
517 | n->next = t; | |
518 | t = n; | |
519 | ||
520 | n = xmalloc(sizeof(*n)); | |
64e6c1e1 | 521 | n->string = xstrdup("{"); |
78c04153 SR |
522 | n->tag = SYM_NORMAL; |
523 | n->next = t; | |
64e6c1e1 AG |
524 | t = n; |
525 | ||
526 | n = xmalloc(sizeof(*n)); | |
527 | n->string = xstrdup("UNKNOWN"); | |
528 | n->tag = SYM_NORMAL; | |
529 | n->next = t; | |
530 | t = n; | |
531 | ||
532 | n = xmalloc(sizeof(*n)); | |
533 | n->string = xstrdup("}"); | |
534 | n->tag = SYM_NORMAL; | |
535 | n->next = t; | |
536 | t = n; | |
78c04153 SR |
537 | |
538 | subsym = | |
539 | add_symbol(cur->string, cur->tag, n, 0); | |
540 | } | |
541 | if (subsym->expansion_trail) { | |
542 | if (flag_dump_defs) { | |
543 | fprintf(debugfile, "%s %s ", | |
7ec8eda1 | 544 | symbol_types[cur->tag].name, |
78c04153 SR |
545 | cur->string); |
546 | } | |
547 | ||
7ec8eda1 | 548 | crc = partial_crc32(symbol_types[cur->tag].name, |
ce560686 | 549 | crc); |
78c04153 SR |
550 | crc = partial_crc32_one(' ', crc); |
551 | crc = partial_crc32(cur->string, crc); | |
552 | crc = partial_crc32_one(' ', crc); | |
553 | } else { | |
554 | subsym->expansion_trail = expansion_trail; | |
555 | expansion_trail = subsym; | |
15fde675 | 556 | crc = expand_and_crc_sym(subsym, crc); |
78c04153 SR |
557 | } |
558 | break; | |
1da177e4 | 559 | } |
1da177e4 | 560 | } |
1da177e4 | 561 | |
15fde675 AG |
562 | { |
563 | static struct symbol **end = &visited_symbols; | |
564 | ||
565 | if (!sym->visited) { | |
566 | *end = sym; | |
567 | end = &sym->visited; | |
568 | sym->visited = (struct symbol *)-1L; | |
569 | } | |
570 | } | |
571 | ||
78c04153 | 572 | return crc; |
1da177e4 LT |
573 | } |
574 | ||
78c04153 | 575 | void export_symbol(const char *name) |
1da177e4 | 576 | { |
78c04153 | 577 | struct symbol *sym; |
1da177e4 | 578 | |
78c04153 SR |
579 | sym = find_symbol(name, SYM_NORMAL); |
580 | if (!sym) | |
581 | error_with_pos("export undefined symbol %s", name); | |
582 | else { | |
583 | unsigned long crc; | |
64e6c1e1 | 584 | int has_changed = 0; |
1da177e4 | 585 | |
78c04153 SR |
586 | if (flag_dump_defs) |
587 | fprintf(debugfile, "Export %s == <", name); | |
1da177e4 | 588 | |
78c04153 | 589 | expansion_trail = (struct symbol *)-1L; |
1da177e4 | 590 | |
64e6c1e1 AG |
591 | sym->expansion_trail = expansion_trail; |
592 | expansion_trail = sym; | |
15fde675 | 593 | crc = expand_and_crc_sym(sym, 0xffffffff) ^ 0xffffffff; |
1da177e4 | 594 | |
78c04153 SR |
595 | sym = expansion_trail; |
596 | while (sym != (struct symbol *)-1L) { | |
597 | struct symbol *n = sym->expansion_trail; | |
64e6c1e1 AG |
598 | |
599 | if (sym->status != STATUS_UNCHANGED) { | |
600 | if (!has_changed) { | |
601 | print_location(); | |
602 | fprintf(stderr, "%s: %s: modversion " | |
603 | "changed because of changes " | |
604 | "in ", flag_preserve ? "error" : | |
605 | "warning", name); | |
606 | } else | |
607 | fprintf(stderr, ", "); | |
608 | print_type_name(sym->type, sym->name); | |
609 | if (sym->status == STATUS_DEFINED) | |
610 | fprintf(stderr, " (became defined)"); | |
611 | has_changed = 1; | |
612 | if (flag_preserve) | |
613 | errors++; | |
614 | } | |
78c04153 SR |
615 | sym->expansion_trail = 0; |
616 | sym = n; | |
617 | } | |
64e6c1e1 AG |
618 | if (has_changed) |
619 | fprintf(stderr, "\n"); | |
1da177e4 | 620 | |
78c04153 SR |
621 | if (flag_dump_defs) |
622 | fputs(">\n", debugfile); | |
1da177e4 | 623 | |
2ea03891 SR |
624 | /* Used as a linker script. */ |
625 | printf("%s__crc_%s = 0x%08lx ;\n", mod_prefix, name, crc); | |
78c04153 | 626 | } |
1da177e4 LT |
627 | } |
628 | ||
629 | /*----------------------------------------------------------------------*/ | |
64e6c1e1 AG |
630 | |
631 | static void print_location(void) | |
632 | { | |
633 | fprintf(stderr, "%s:%d: ", cur_filename ? : "<stdin>", cur_line); | |
634 | } | |
635 | ||
636 | static void print_type_name(enum symbol_type type, const char *name) | |
637 | { | |
7ec8eda1 MM |
638 | if (symbol_types[type].name) |
639 | fprintf(stderr, "%s %s", symbol_types[type].name, name); | |
64e6c1e1 AG |
640 | else |
641 | fprintf(stderr, "%s", name); | |
642 | } | |
643 | ||
78c04153 | 644 | void error_with_pos(const char *fmt, ...) |
1da177e4 | 645 | { |
78c04153 | 646 | va_list args; |
1da177e4 | 647 | |
78c04153 | 648 | if (flag_warnings) { |
64e6c1e1 | 649 | print_location(); |
1da177e4 | 650 | |
78c04153 SR |
651 | va_start(args, fmt); |
652 | vfprintf(stderr, fmt, args); | |
653 | va_end(args); | |
654 | putc('\n', stderr); | |
1da177e4 | 655 | |
78c04153 SR |
656 | errors++; |
657 | } | |
1da177e4 LT |
658 | } |
659 | ||
ce560686 | 660 | static void genksyms_usage(void) |
1da177e4 | 661 | { |
2ea03891 | 662 | fputs("Usage:\n" "genksyms [-adDTwqhV] > /path/to/.tmp_obj.ver\n" "\n" |
1da177e4 | 663 | #ifdef __GNU_LIBRARY__ |
36091fd3 | 664 | " -a, --arch Select architecture\n" |
1da177e4 LT |
665 | " -d, --debug Increment the debug level (repeatable)\n" |
666 | " -D, --dump Dump expanded symbol defs (for debugging only)\n" | |
64e6c1e1 AG |
667 | " -r, --reference file Read reference symbols from a file\n" |
668 | " -T, --dump-types file Dump expanded types into file\n" | |
669 | " -p, --preserve Preserve reference modversions or fail\n" | |
1da177e4 LT |
670 | " -w, --warnings Enable warnings\n" |
671 | " -q, --quiet Disable warnings (default)\n" | |
672 | " -h, --help Print this message\n" | |
673 | " -V, --version Print the release version\n" | |
78c04153 | 674 | #else /* __GNU_LIBRARY__ */ |
36091fd3 | 675 | " -a Select architecture\n" |
78c04153 SR |
676 | " -d Increment the debug level (repeatable)\n" |
677 | " -D Dump expanded symbol defs (for debugging only)\n" | |
64e6c1e1 AG |
678 | " -r file Read reference symbols from a file\n" |
679 | " -T file Dump expanded types into file\n" | |
680 | " -p Preserve reference modversions or fail\n" | |
78c04153 SR |
681 | " -w Enable warnings\n" |
682 | " -q Disable warnings (default)\n" | |
683 | " -h Print this message\n" | |
684 | " -V Print the release version\n" | |
685 | #endif /* __GNU_LIBRARY__ */ | |
1da177e4 LT |
686 | , stderr); |
687 | } | |
688 | ||
78c04153 | 689 | int main(int argc, char **argv) |
1da177e4 | 690 | { |
64e6c1e1 | 691 | FILE *dumpfile = NULL, *ref_file = NULL; |
78c04153 | 692 | int o; |
1da177e4 LT |
693 | |
694 | #ifdef __GNU_LIBRARY__ | |
78c04153 SR |
695 | struct option long_opts[] = { |
696 | {"arch", 1, 0, 'a'}, | |
697 | {"debug", 0, 0, 'd'}, | |
698 | {"warnings", 0, 0, 'w'}, | |
699 | {"quiet", 0, 0, 'q'}, | |
700 | {"dump", 0, 0, 'D'}, | |
64e6c1e1 | 701 | {"reference", 1, 0, 'r'}, |
15fde675 | 702 | {"dump-types", 1, 0, 'T'}, |
64e6c1e1 | 703 | {"preserve", 0, 0, 'p'}, |
78c04153 SR |
704 | {"version", 0, 0, 'V'}, |
705 | {"help", 0, 0, 'h'}, | |
706 | {0, 0, 0, 0} | |
707 | }; | |
708 | ||
2ea03891 | 709 | while ((o = getopt_long(argc, argv, "a:dwqVDr:T:ph", |
78c04153 SR |
710 | &long_opts[0], NULL)) != EOF) |
711 | #else /* __GNU_LIBRARY__ */ | |
2ea03891 | 712 | while ((o = getopt(argc, argv, "a:dwqVDr:T:ph")) != EOF) |
78c04153 SR |
713 | #endif /* __GNU_LIBRARY__ */ |
714 | switch (o) { | |
715 | case 'a': | |
716 | arch = optarg; | |
717 | break; | |
718 | case 'd': | |
719 | flag_debug++; | |
720 | break; | |
721 | case 'w': | |
722 | flag_warnings = 1; | |
723 | break; | |
724 | case 'q': | |
725 | flag_warnings = 0; | |
726 | break; | |
727 | case 'V': | |
728 | fputs("genksyms version 2.5.60\n", stderr); | |
729 | break; | |
730 | case 'D': | |
731 | flag_dump_defs = 1; | |
732 | break; | |
64e6c1e1 AG |
733 | case 'r': |
734 | flag_reference = 1; | |
735 | ref_file = fopen(optarg, "r"); | |
736 | if (!ref_file) { | |
737 | perror(optarg); | |
738 | return 1; | |
739 | } | |
740 | break; | |
15fde675 AG |
741 | case 'T': |
742 | flag_dump_types = 1; | |
743 | dumpfile = fopen(optarg, "w"); | |
744 | if (!dumpfile) { | |
745 | perror(optarg); | |
746 | return 1; | |
747 | } | |
748 | break; | |
64e6c1e1 AG |
749 | case 'p': |
750 | flag_preserve = 1; | |
751 | break; | |
78c04153 SR |
752 | case 'h': |
753 | genksyms_usage(); | |
754 | return 0; | |
755 | default: | |
756 | genksyms_usage(); | |
757 | return 1; | |
758 | } | |
f606ddf4 | 759 | if ((strcmp(arch, "h8300") == 0) || (strcmp(arch, "blackfin") == 0)) |
78c04153 SR |
760 | mod_prefix = "_"; |
761 | { | |
762 | extern int yydebug; | |
763 | extern int yy_flex_debug; | |
764 | ||
765 | yydebug = (flag_debug > 1); | |
766 | yy_flex_debug = (flag_debug > 2); | |
767 | ||
768 | debugfile = stderr; | |
769 | /* setlinebuf(debugfile); */ | |
770 | } | |
771 | ||
c64152bf | 772 | if (flag_reference) { |
64e6c1e1 | 773 | read_reference(ref_file); |
c64152bf AB |
774 | fclose(ref_file); |
775 | } | |
64e6c1e1 | 776 | |
78c04153 SR |
777 | yyparse(); |
778 | ||
15fde675 AG |
779 | if (flag_dump_types && visited_symbols) { |
780 | while (visited_symbols != (struct symbol *)-1L) { | |
781 | struct symbol *sym = visited_symbols; | |
782 | ||
5dae9a55 AG |
783 | if (sym->is_override) |
784 | fputs("override ", dumpfile); | |
7ec8eda1 MM |
785 | if (symbol_types[sym->type].n) { |
786 | putc(symbol_types[sym->type].n, dumpfile); | |
15fde675 AG |
787 | putc('#', dumpfile); |
788 | } | |
789 | fputs(sym->name, dumpfile); | |
790 | putc(' ', dumpfile); | |
3b40d381 AG |
791 | if (sym->is_extern) |
792 | fputs("extern ", dumpfile); | |
15fde675 AG |
793 | print_list(dumpfile, sym->defn); |
794 | putc('\n', dumpfile); | |
795 | ||
796 | visited_symbols = sym->visited; | |
797 | sym->visited = NULL; | |
798 | } | |
799 | } | |
800 | ||
78c04153 SR |
801 | if (flag_debug) { |
802 | fprintf(debugfile, "Hash table occupancy %d/%d = %g\n", | |
803 | nsyms, HASH_BUCKETS, | |
804 | (double)nsyms / (double)HASH_BUCKETS); | |
805 | } | |
806 | ||
807 | return errors != 0; | |
1da177e4 | 808 | } |