Commit | Line | Data |
---|---|---|
3284fe0c | 1 | /* elfcomm.c -- common code for ELF format file. |
4b95cf5c | 2 | Copyright (C) 2010-2014 Free Software Foundation, Inc. |
3284fe0c L |
3 | |
4 | Originally developed by Eric Youngdale <eric@andante.jic.com> | |
5 | Modifications by Nick Clifton <nickc@redhat.com> | |
6 | ||
7 | This file is part of GNU Binutils. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA | |
22 | 02110-1301, USA. */ | |
23 | ||
24 | #include "sysdep.h" | |
25 | #include "libiberty.h" | |
26 | #include "filenames.h" | |
27 | #include "bfd.h" | |
28 | #include "aout/ar.h" | |
29 | #include "bucomm.h" | |
30 | #include "elfcomm.h" | |
c2a7d3f5 | 31 | #include <assert.h> |
3284fe0c L |
32 | |
33 | void | |
34 | error (const char *message, ...) | |
35 | { | |
36 | va_list args; | |
37 | ||
fafd911d NC |
38 | /* Try to keep error messages in sync with the program's normal output. */ |
39 | fflush (stdout); | |
40 | ||
3284fe0c L |
41 | va_start (args, message); |
42 | fprintf (stderr, _("%s: Error: "), program_name); | |
43 | vfprintf (stderr, message, args); | |
44 | va_end (args); | |
45 | } | |
46 | ||
47 | void | |
48 | warn (const char *message, ...) | |
49 | { | |
50 | va_list args; | |
51 | ||
fafd911d NC |
52 | /* Try to keep warning messages in sync with the program's normal output. */ |
53 | fflush (stdout); | |
54 | ||
3284fe0c L |
55 | va_start (args, message); |
56 | fprintf (stderr, _("%s: Warning: "), program_name); | |
57 | vfprintf (stderr, message, args); | |
58 | va_end (args); | |
59 | } | |
60 | ||
61 | void (*byte_put) (unsigned char *, elf_vma, int); | |
62 | ||
63 | void | |
64 | byte_put_little_endian (unsigned char * field, elf_vma value, int size) | |
65 | { | |
66 | switch (size) | |
67 | { | |
68 | case 8: | |
69 | field[7] = (((value >> 24) >> 24) >> 8) & 0xff; | |
70 | field[6] = ((value >> 24) >> 24) & 0xff; | |
71 | field[5] = ((value >> 24) >> 16) & 0xff; | |
72 | field[4] = ((value >> 24) >> 8) & 0xff; | |
73 | /* Fall through. */ | |
74 | case 4: | |
75 | field[3] = (value >> 24) & 0xff; | |
76 | /* Fall through. */ | |
77 | case 3: | |
78 | field[2] = (value >> 16) & 0xff; | |
79 | /* Fall through. */ | |
80 | case 2: | |
81 | field[1] = (value >> 8) & 0xff; | |
82 | /* Fall through. */ | |
83 | case 1: | |
84 | field[0] = value & 0xff; | |
85 | break; | |
86 | ||
87 | default: | |
88 | error (_("Unhandled data length: %d\n"), size); | |
89 | abort (); | |
90 | } | |
91 | } | |
92 | ||
93 | void | |
94 | byte_put_big_endian (unsigned char * field, elf_vma value, int size) | |
95 | { | |
96 | switch (size) | |
97 | { | |
98 | case 8: | |
99 | field[7] = value & 0xff; | |
100 | field[6] = (value >> 8) & 0xff; | |
101 | field[5] = (value >> 16) & 0xff; | |
102 | field[4] = (value >> 24) & 0xff; | |
103 | value >>= 16; | |
104 | value >>= 16; | |
105 | /* Fall through. */ | |
106 | case 4: | |
107 | field[3] = value & 0xff; | |
108 | value >>= 8; | |
109 | /* Fall through. */ | |
110 | case 3: | |
111 | field[2] = value & 0xff; | |
112 | value >>= 8; | |
113 | /* Fall through. */ | |
114 | case 2: | |
115 | field[1] = value & 0xff; | |
116 | value >>= 8; | |
117 | /* Fall through. */ | |
118 | case 1: | |
119 | field[0] = value & 0xff; | |
120 | break; | |
121 | ||
122 | default: | |
123 | error (_("Unhandled data length: %d\n"), size); | |
124 | abort (); | |
125 | } | |
126 | } | |
127 | ||
128 | elf_vma (*byte_get) (unsigned char *, int); | |
129 | ||
130 | elf_vma | |
131 | byte_get_little_endian (unsigned char *field, int size) | |
132 | { | |
133 | switch (size) | |
134 | { | |
135 | case 1: | |
136 | return *field; | |
137 | ||
138 | case 2: | |
139 | return ((unsigned int) (field[0])) | |
140 | | (((unsigned int) (field[1])) << 8); | |
141 | ||
142 | case 3: | |
143 | return ((unsigned long) (field[0])) | |
144 | | (((unsigned long) (field[1])) << 8) | |
145 | | (((unsigned long) (field[2])) << 16); | |
146 | ||
147 | case 4: | |
148 | return ((unsigned long) (field[0])) | |
149 | | (((unsigned long) (field[1])) << 8) | |
150 | | (((unsigned long) (field[2])) << 16) | |
151 | | (((unsigned long) (field[3])) << 24); | |
152 | ||
87bc83b3 CC |
153 | case 5: |
154 | if (sizeof (elf_vma) == 8) | |
155 | return ((elf_vma) (field[0])) | |
156 | | (((elf_vma) (field[1])) << 8) | |
157 | | (((elf_vma) (field[2])) << 16) | |
158 | | (((elf_vma) (field[3])) << 24) | |
159 | | (((elf_vma) (field[4])) << 32); | |
160 | else if (sizeof (elf_vma) == 4) | |
161 | /* We want to extract data from an 8 byte wide field and | |
162 | place it into a 4 byte wide field. Since this is a little | |
163 | endian source we can just use the 4 byte extraction code. */ | |
164 | return ((unsigned long) (field[0])) | |
165 | | (((unsigned long) (field[1])) << 8) | |
166 | | (((unsigned long) (field[2])) << 16) | |
167 | | (((unsigned long) (field[3])) << 24); | |
168 | ||
169 | case 6: | |
170 | if (sizeof (elf_vma) == 8) | |
171 | return ((elf_vma) (field[0])) | |
172 | | (((elf_vma) (field[1])) << 8) | |
173 | | (((elf_vma) (field[2])) << 16) | |
174 | | (((elf_vma) (field[3])) << 24) | |
175 | | (((elf_vma) (field[4])) << 32) | |
176 | | (((elf_vma) (field[5])) << 40); | |
177 | else if (sizeof (elf_vma) == 4) | |
178 | /* We want to extract data from an 8 byte wide field and | |
179 | place it into a 4 byte wide field. Since this is a little | |
180 | endian source we can just use the 4 byte extraction code. */ | |
181 | return ((unsigned long) (field[0])) | |
182 | | (((unsigned long) (field[1])) << 8) | |
183 | | (((unsigned long) (field[2])) << 16) | |
184 | | (((unsigned long) (field[3])) << 24); | |
185 | ||
186 | case 7: | |
187 | if (sizeof (elf_vma) == 8) | |
188 | return ((elf_vma) (field[0])) | |
189 | | (((elf_vma) (field[1])) << 8) | |
190 | | (((elf_vma) (field[2])) << 16) | |
191 | | (((elf_vma) (field[3])) << 24) | |
192 | | (((elf_vma) (field[4])) << 32) | |
193 | | (((elf_vma) (field[5])) << 40) | |
194 | | (((elf_vma) (field[6])) << 48); | |
195 | else if (sizeof (elf_vma) == 4) | |
196 | /* We want to extract data from an 8 byte wide field and | |
197 | place it into a 4 byte wide field. Since this is a little | |
198 | endian source we can just use the 4 byte extraction code. */ | |
199 | return ((unsigned long) (field[0])) | |
200 | | (((unsigned long) (field[1])) << 8) | |
201 | | (((unsigned long) (field[2])) << 16) | |
202 | | (((unsigned long) (field[3])) << 24); | |
203 | ||
3284fe0c L |
204 | case 8: |
205 | if (sizeof (elf_vma) == 8) | |
206 | return ((elf_vma) (field[0])) | |
207 | | (((elf_vma) (field[1])) << 8) | |
208 | | (((elf_vma) (field[2])) << 16) | |
209 | | (((elf_vma) (field[3])) << 24) | |
210 | | (((elf_vma) (field[4])) << 32) | |
211 | | (((elf_vma) (field[5])) << 40) | |
212 | | (((elf_vma) (field[6])) << 48) | |
213 | | (((elf_vma) (field[7])) << 56); | |
214 | else if (sizeof (elf_vma) == 4) | |
215 | /* We want to extract data from an 8 byte wide field and | |
216 | place it into a 4 byte wide field. Since this is a little | |
217 | endian source we can just use the 4 byte extraction code. */ | |
218 | return ((unsigned long) (field[0])) | |
219 | | (((unsigned long) (field[1])) << 8) | |
220 | | (((unsigned long) (field[2])) << 16) | |
221 | | (((unsigned long) (field[3])) << 24); | |
222 | ||
223 | default: | |
224 | error (_("Unhandled data length: %d\n"), size); | |
225 | abort (); | |
226 | } | |
227 | } | |
228 | ||
229 | elf_vma | |
230 | byte_get_big_endian (unsigned char *field, int size) | |
231 | { | |
232 | switch (size) | |
233 | { | |
234 | case 1: | |
235 | return *field; | |
236 | ||
237 | case 2: | |
238 | return ((unsigned int) (field[1])) | (((int) (field[0])) << 8); | |
239 | ||
240 | case 3: | |
241 | return ((unsigned long) (field[2])) | |
242 | | (((unsigned long) (field[1])) << 8) | |
243 | | (((unsigned long) (field[0])) << 16); | |
244 | ||
245 | case 4: | |
246 | return ((unsigned long) (field[3])) | |
247 | | (((unsigned long) (field[2])) << 8) | |
248 | | (((unsigned long) (field[1])) << 16) | |
249 | | (((unsigned long) (field[0])) << 24); | |
250 | ||
87bc83b3 CC |
251 | case 5: |
252 | if (sizeof (elf_vma) == 8) | |
253 | return ((elf_vma) (field[4])) | |
254 | | (((elf_vma) (field[3])) << 8) | |
255 | | (((elf_vma) (field[2])) << 16) | |
256 | | (((elf_vma) (field[1])) << 24) | |
257 | | (((elf_vma) (field[0])) << 32); | |
258 | else if (sizeof (elf_vma) == 4) | |
259 | { | |
260 | /* Although we are extracting data from an 8 byte wide field, | |
261 | we are returning only 4 bytes of data. */ | |
262 | field += 1; | |
263 | return ((unsigned long) (field[3])) | |
264 | | (((unsigned long) (field[2])) << 8) | |
265 | | (((unsigned long) (field[1])) << 16) | |
266 | | (((unsigned long) (field[0])) << 24); | |
267 | } | |
268 | ||
269 | case 6: | |
270 | if (sizeof (elf_vma) == 8) | |
271 | return ((elf_vma) (field[5])) | |
272 | | (((elf_vma) (field[4])) << 8) | |
273 | | (((elf_vma) (field[3])) << 16) | |
274 | | (((elf_vma) (field[2])) << 24) | |
275 | | (((elf_vma) (field[1])) << 32) | |
276 | | (((elf_vma) (field[0])) << 40); | |
277 | else if (sizeof (elf_vma) == 4) | |
278 | { | |
279 | /* Although we are extracting data from an 8 byte wide field, | |
280 | we are returning only 4 bytes of data. */ | |
281 | field += 2; | |
282 | return ((unsigned long) (field[3])) | |
283 | | (((unsigned long) (field[2])) << 8) | |
284 | | (((unsigned long) (field[1])) << 16) | |
285 | | (((unsigned long) (field[0])) << 24); | |
286 | } | |
287 | ||
288 | case 7: | |
289 | if (sizeof (elf_vma) == 8) | |
290 | return ((elf_vma) (field[6])) | |
291 | | (((elf_vma) (field[5])) << 8) | |
292 | | (((elf_vma) (field[4])) << 16) | |
293 | | (((elf_vma) (field[3])) << 24) | |
294 | | (((elf_vma) (field[2])) << 32) | |
295 | | (((elf_vma) (field[1])) << 40) | |
296 | | (((elf_vma) (field[0])) << 48); | |
297 | else if (sizeof (elf_vma) == 4) | |
298 | { | |
299 | /* Although we are extracting data from an 8 byte wide field, | |
300 | we are returning only 4 bytes of data. */ | |
301 | field += 3; | |
302 | return ((unsigned long) (field[3])) | |
303 | | (((unsigned long) (field[2])) << 8) | |
304 | | (((unsigned long) (field[1])) << 16) | |
305 | | (((unsigned long) (field[0])) << 24); | |
306 | } | |
307 | ||
3284fe0c L |
308 | case 8: |
309 | if (sizeof (elf_vma) == 8) | |
310 | return ((elf_vma) (field[7])) | |
311 | | (((elf_vma) (field[6])) << 8) | |
312 | | (((elf_vma) (field[5])) << 16) | |
313 | | (((elf_vma) (field[4])) << 24) | |
314 | | (((elf_vma) (field[3])) << 32) | |
315 | | (((elf_vma) (field[2])) << 40) | |
316 | | (((elf_vma) (field[1])) << 48) | |
317 | | (((elf_vma) (field[0])) << 56); | |
318 | else if (sizeof (elf_vma) == 4) | |
319 | { | |
87bc83b3 | 320 | /* Although we are extracting data from an 8 byte wide field, |
3284fe0c L |
321 | we are returning only 4 bytes of data. */ |
322 | field += 4; | |
323 | return ((unsigned long) (field[3])) | |
324 | | (((unsigned long) (field[2])) << 8) | |
325 | | (((unsigned long) (field[1])) << 16) | |
326 | | (((unsigned long) (field[0])) << 24); | |
327 | } | |
328 | ||
329 | default: | |
330 | error (_("Unhandled data length: %d\n"), size); | |
331 | abort (); | |
332 | } | |
333 | } | |
334 | ||
335 | elf_vma | |
336 | byte_get_signed (unsigned char *field, int size) | |
337 | { | |
338 | elf_vma x = byte_get (field, size); | |
339 | ||
340 | switch (size) | |
341 | { | |
342 | case 1: | |
343 | return (x ^ 0x80) - 0x80; | |
344 | case 2: | |
345 | return (x ^ 0x8000) - 0x8000; | |
87bc83b3 CC |
346 | case 3: |
347 | return (x ^ 0x800000) - 0x800000; | |
3284fe0c L |
348 | case 4: |
349 | return (x ^ 0x80000000) - 0x80000000; | |
87bc83b3 CC |
350 | case 5: |
351 | case 6: | |
352 | case 7: | |
3284fe0c | 353 | case 8: |
87bc83b3 CC |
354 | /* Reads of 5-, 6-, and 7-byte numbers are the result of |
355 | trying to read past the end of a buffer, and will therefore | |
356 | not have meaningful values, so we don't try to deal with | |
357 | the sign in these cases. */ | |
3284fe0c L |
358 | return x; |
359 | default: | |
360 | abort (); | |
361 | } | |
362 | } | |
363 | ||
74bc6052 CC |
364 | /* Return the high-order 32-bits and the low-order 32-bits |
365 | of an 8-byte value separately. */ | |
366 | ||
367 | void | |
368 | byte_get_64 (unsigned char *field, elf_vma *high, elf_vma *low) | |
369 | { | |
370 | if (byte_get == byte_get_big_endian) | |
371 | { | |
372 | *high = byte_get_big_endian (field, 4); | |
373 | *low = byte_get_big_endian (field + 4, 4); | |
374 | } | |
375 | else | |
376 | { | |
377 | *high = byte_get_little_endian (field + 4, 4); | |
378 | *low = byte_get_little_endian (field, 4); | |
379 | } | |
380 | return; | |
381 | } | |
382 | ||
3284fe0c L |
383 | /* Return the path name for a proxy entry in a thin archive, adjusted |
384 | relative to the path name of the thin archive itself if necessary. | |
385 | Always returns a pointer to malloc'ed memory. */ | |
386 | ||
387 | char * | |
388 | adjust_relative_path (const char *file_name, const char *name, | |
389 | int name_len) | |
390 | { | |
391 | char * member_file_name; | |
392 | const char * base_name = lbasename (file_name); | |
393 | ||
394 | /* This is a proxy entry for a thin archive member. | |
395 | If the extended name table contains an absolute path | |
396 | name, or if the archive is in the current directory, | |
397 | use the path name as given. Otherwise, we need to | |
398 | find the member relative to the directory where the | |
399 | archive is located. */ | |
400 | if (IS_ABSOLUTE_PATH (name) || base_name == file_name) | |
401 | { | |
402 | member_file_name = (char *) malloc (name_len + 1); | |
403 | if (member_file_name == NULL) | |
404 | { | |
405 | error (_("Out of memory\n")); | |
406 | return NULL; | |
407 | } | |
408 | memcpy (member_file_name, name, name_len); | |
409 | member_file_name[name_len] = '\0'; | |
410 | } | |
411 | else | |
412 | { | |
413 | /* Concatenate the path components of the archive file name | |
414 | to the relative path name from the extended name table. */ | |
415 | size_t prefix_len = base_name - file_name; | |
416 | member_file_name = (char *) malloc (prefix_len + name_len + 1); | |
417 | if (member_file_name == NULL) | |
418 | { | |
419 | error (_("Out of memory\n")); | |
420 | return NULL; | |
421 | } | |
422 | memcpy (member_file_name, file_name, prefix_len); | |
423 | memcpy (member_file_name + prefix_len, name, name_len); | |
424 | member_file_name[prefix_len + name_len] = '\0'; | |
425 | } | |
426 | return member_file_name; | |
427 | } | |
428 | ||
c2a7d3f5 NC |
429 | /* Processes the archive index table and symbol table in ARCH. |
430 | Entries in the index table are SIZEOF_AR_INDEX bytes long. | |
431 | Fills in ARCH->next_arhdr_offset and ARCH->arhdr. | |
432 | If READ_SYMBOLS is true then fills in ARCH->index_num, ARCH->index_array, | |
433 | ARCH->sym_size and ARCH->sym_table. | |
434 | It is the caller's responsibility to free ARCH->index_array and | |
435 | ARCH->sym_table. | |
436 | Returns TRUE upon success, FALSE otherwise. | |
437 | If failure occurs an error message is printed. */ | |
438 | ||
439 | static bfd_boolean | |
440 | process_archive_index_and_symbols (struct archive_info * arch, | |
441 | unsigned int sizeof_ar_index, | |
442 | bfd_boolean read_symbols) | |
443 | { | |
444 | size_t got; | |
445 | unsigned long size; | |
446 | ||
447 | size = strtoul (arch->arhdr.ar_size, NULL, 10); | |
448 | size = size + (size & 1); | |
449 | ||
450 | arch->next_arhdr_offset += sizeof arch->arhdr + size; | |
451 | ||
452 | if (! read_symbols) | |
453 | { | |
454 | if (fseek (arch->file, size, SEEK_CUR) != 0) | |
455 | { | |
456 | error (_("%s: failed to skip archive symbol table\n"), | |
457 | arch->file_name); | |
458 | return FALSE; | |
459 | } | |
460 | } | |
461 | else | |
462 | { | |
463 | unsigned long i; | |
464 | /* A buffer used to hold numbers read in from an archive index. | |
465 | These are always SIZEOF_AR_INDEX bytes long and stored in | |
466 | big-endian format. */ | |
467 | unsigned char integer_buffer[sizeof arch->index_num]; | |
468 | unsigned char * index_buffer; | |
469 | ||
470 | assert (sizeof_ar_index <= sizeof integer_buffer); | |
471 | ||
472 | /* Check the size of the archive index. */ | |
473 | if (size < sizeof_ar_index) | |
474 | { | |
475 | error (_("%s: the archive index is empty\n"), arch->file_name); | |
476 | return FALSE; | |
477 | } | |
478 | ||
479 | /* Read the number of entries in the archive index. */ | |
480 | got = fread (integer_buffer, 1, sizeof_ar_index, arch->file); | |
481 | if (got != sizeof_ar_index) | |
482 | { | |
483 | error (_("%s: failed to read archive index\n"), arch->file_name); | |
484 | return FALSE; | |
485 | } | |
486 | ||
487 | arch->index_num = byte_get_big_endian (integer_buffer, sizeof_ar_index); | |
488 | size -= sizeof_ar_index; | |
489 | ||
490 | if (size < arch->index_num * sizeof_ar_index) | |
491 | { | |
492 | error (_("%s: the archive index is supposed to have %ld entries of %d bytes, but the size is only %ld\n"), | |
493 | arch->file_name, (long) arch->index_num, sizeof_ar_index, size); | |
494 | return FALSE; | |
495 | } | |
496 | ||
497 | /* Read in the archive index. */ | |
498 | index_buffer = (unsigned char *) | |
499 | malloc (arch->index_num * sizeof_ar_index); | |
500 | if (index_buffer == NULL) | |
501 | { | |
502 | error (_("Out of memory whilst trying to read archive symbol index\n")); | |
503 | return FALSE; | |
504 | } | |
505 | ||
506 | got = fread (index_buffer, sizeof_ar_index, arch->index_num, arch->file); | |
507 | if (got != arch->index_num) | |
508 | { | |
509 | free (index_buffer); | |
510 | error (_("%s: failed to read archive index\n"), arch->file_name); | |
511 | return FALSE; | |
512 | } | |
513 | ||
514 | size -= arch->index_num * sizeof_ar_index; | |
515 | ||
516 | /* Convert the index numbers into the host's numeric format. */ | |
517 | arch->index_array = (elf_vma *) | |
518 | malloc (arch->index_num * sizeof (* arch->index_array)); | |
519 | if (arch->index_array == NULL) | |
520 | { | |
521 | free (index_buffer); | |
522 | error (_("Out of memory whilst trying to convert the archive symbol index\n")); | |
523 | return FALSE; | |
524 | } | |
525 | ||
526 | for (i = 0; i < arch->index_num; i++) | |
527 | arch->index_array[i] = | |
528 | byte_get_big_endian ((unsigned char *) (index_buffer + (i * sizeof_ar_index)), | |
529 | sizeof_ar_index); | |
530 | free (index_buffer); | |
531 | ||
532 | /* The remaining space in the header is taken up by the symbol table. */ | |
533 | if (size < 1) | |
534 | { | |
535 | error (_("%s: the archive has an index but no symbols\n"), | |
536 | arch->file_name); | |
537 | return FALSE; | |
538 | } | |
539 | ||
540 | arch->sym_table = (char *) malloc (size); | |
541 | if (arch->sym_table == NULL) | |
542 | { | |
543 | error (_("Out of memory whilst trying to read archive index symbol table\n")); | |
544 | return FALSE; | |
545 | } | |
546 | ||
547 | arch->sym_size = size; | |
548 | got = fread (arch->sym_table, 1, size, arch->file); | |
549 | if (got != size) | |
550 | { | |
551 | error (_("%s: failed to read archive index symbol table\n"), | |
552 | arch->file_name); | |
553 | return FALSE; | |
554 | } | |
555 | } | |
556 | ||
557 | /* Read the next archive header. */ | |
558 | got = fread (&arch->arhdr, 1, sizeof arch->arhdr, arch->file); | |
559 | if (got != sizeof arch->arhdr && got != 0) | |
560 | { | |
561 | error (_("%s: failed to read archive header following archive index\n"), | |
562 | arch->file_name); | |
563 | return FALSE; | |
564 | } | |
565 | ||
566 | return TRUE; | |
567 | } | |
568 | ||
3284fe0c L |
569 | /* Read the symbol table and long-name table from an archive. */ |
570 | ||
571 | int | |
572 | setup_archive (struct archive_info *arch, const char *file_name, | |
573 | FILE *file, bfd_boolean is_thin_archive, | |
574 | bfd_boolean read_symbols) | |
575 | { | |
576 | size_t got; | |
3284fe0c L |
577 | |
578 | arch->file_name = strdup (file_name); | |
579 | arch->file = file; | |
580 | arch->index_num = 0; | |
581 | arch->index_array = NULL; | |
582 | arch->sym_table = NULL; | |
583 | arch->sym_size = 0; | |
584 | arch->longnames = NULL; | |
585 | arch->longnames_size = 0; | |
586 | arch->nested_member_origin = 0; | |
587 | arch->is_thin_archive = is_thin_archive; | |
c2a7d3f5 | 588 | arch->uses_64bit_indicies = FALSE; |
3284fe0c L |
589 | arch->next_arhdr_offset = SARMAG; |
590 | ||
591 | /* Read the first archive member header. */ | |
592 | if (fseek (file, SARMAG, SEEK_SET) != 0) | |
593 | { | |
594 | error (_("%s: failed to seek to first archive header\n"), file_name); | |
595 | return 1; | |
596 | } | |
597 | got = fread (&arch->arhdr, 1, sizeof arch->arhdr, file); | |
598 | if (got != sizeof arch->arhdr) | |
599 | { | |
600 | if (got == 0) | |
601 | return 0; | |
602 | ||
603 | error (_("%s: failed to read archive header\n"), file_name); | |
604 | return 1; | |
605 | } | |
606 | ||
607 | /* See if this is the archive symbol table. */ | |
c2a7d3f5 | 608 | if (const_strneq (arch->arhdr.ar_name, "/ ")) |
3284fe0c | 609 | { |
c2a7d3f5 NC |
610 | if (! process_archive_index_and_symbols (arch, 4, read_symbols)) |
611 | return 1; | |
612 | } | |
613 | else if (const_strneq (arch->arhdr.ar_name, "/SYM64/ ")) | |
614 | { | |
615 | arch->uses_64bit_indicies = TRUE; | |
616 | if (! process_archive_index_and_symbols (arch, 8, read_symbols)) | |
617 | return 1; | |
3284fe0c L |
618 | } |
619 | else if (read_symbols) | |
620 | printf (_("%s has no archive index\n"), file_name); | |
621 | ||
622 | if (const_strneq (arch->arhdr.ar_name, "// ")) | |
623 | { | |
624 | /* This is the archive string table holding long member names. */ | |
625 | arch->longnames_size = strtoul (arch->arhdr.ar_size, NULL, 10); | |
626 | arch->next_arhdr_offset += sizeof arch->arhdr + arch->longnames_size; | |
627 | ||
628 | arch->longnames = (char *) malloc (arch->longnames_size); | |
629 | if (arch->longnames == NULL) | |
630 | { | |
631 | error (_("Out of memory reading long symbol names in archive\n")); | |
632 | return 1; | |
633 | } | |
634 | ||
635 | if (fread (arch->longnames, arch->longnames_size, 1, file) != 1) | |
636 | { | |
637 | free (arch->longnames); | |
638 | arch->longnames = NULL; | |
639 | error (_("%s: failed to read long symbol name string table\n"), | |
640 | file_name); | |
641 | return 1; | |
642 | } | |
643 | ||
644 | if ((arch->longnames_size & 1) != 0) | |
645 | getc (file); | |
646 | } | |
647 | ||
648 | return 0; | |
649 | } | |
650 | ||
651 | /* Open and setup a nested archive, if not already open. */ | |
652 | ||
653 | int | |
654 | setup_nested_archive (struct archive_info *nested_arch, | |
655 | const char *member_file_name) | |
656 | { | |
657 | FILE * member_file; | |
658 | ||
659 | /* Have we already setup this archive? */ | |
660 | if (nested_arch->file_name != NULL | |
661 | && streq (nested_arch->file_name, member_file_name)) | |
662 | return 0; | |
663 | ||
664 | /* Close previous file and discard cached information. */ | |
665 | if (nested_arch->file != NULL) | |
666 | fclose (nested_arch->file); | |
667 | release_archive (nested_arch); | |
668 | ||
669 | member_file = fopen (member_file_name, "rb"); | |
670 | if (member_file == NULL) | |
671 | return 1; | |
672 | return setup_archive (nested_arch, member_file_name, member_file, | |
673 | FALSE, FALSE); | |
674 | } | |
675 | ||
676 | /* Release the memory used for the archive information. */ | |
677 | ||
678 | void | |
679 | release_archive (struct archive_info * arch) | |
680 | { | |
681 | if (arch->file_name != NULL) | |
682 | free (arch->file_name); | |
683 | if (arch->index_array != NULL) | |
684 | free (arch->index_array); | |
685 | if (arch->sym_table != NULL) | |
686 | free (arch->sym_table); | |
687 | if (arch->longnames != NULL) | |
688 | free (arch->longnames); | |
689 | } | |
690 | ||
691 | /* Get the name of an archive member from the current archive header. | |
692 | For simple names, this will modify the ar_name field of the current | |
693 | archive header. For long names, it will return a pointer to the | |
694 | longnames table. For nested archives, it will open the nested archive | |
695 | and get the name recursively. NESTED_ARCH is a single-entry cache so | |
696 | we don't keep rereading the same information from a nested archive. */ | |
697 | ||
698 | char * | |
699 | get_archive_member_name (struct archive_info *arch, | |
700 | struct archive_info *nested_arch) | |
701 | { | |
702 | unsigned long j, k; | |
703 | ||
704 | if (arch->arhdr.ar_name[0] == '/') | |
705 | { | |
706 | /* We have a long name. */ | |
707 | char *endp; | |
708 | char *member_file_name; | |
709 | char *member_name; | |
710 | ||
907b01b7 NC |
711 | if (arch->longnames == NULL || arch->longnames_size == 0) |
712 | { | |
713 | error (_("Archive member uses long names, but no longname table found\n")); | |
714 | return NULL; | |
715 | } | |
716 | ||
3284fe0c L |
717 | arch->nested_member_origin = 0; |
718 | k = j = strtoul (arch->arhdr.ar_name + 1, &endp, 10); | |
719 | if (arch->is_thin_archive && endp != NULL && * endp == ':') | |
720 | arch->nested_member_origin = strtoul (endp + 1, NULL, 10); | |
721 | ||
722 | while ((j < arch->longnames_size) | |
723 | && (arch->longnames[j] != '\n') | |
724 | && (arch->longnames[j] != '\0')) | |
725 | j++; | |
726 | if (arch->longnames[j-1] == '/') | |
727 | j--; | |
728 | arch->longnames[j] = '\0'; | |
729 | ||
730 | if (!arch->is_thin_archive || arch->nested_member_origin == 0) | |
731 | return arch->longnames + k; | |
732 | ||
733 | /* This is a proxy for a member of a nested archive. | |
734 | Find the name of the member in that archive. */ | |
735 | member_file_name = adjust_relative_path (arch->file_name, | |
736 | arch->longnames + k, j - k); | |
737 | if (member_file_name != NULL | |
738 | && setup_nested_archive (nested_arch, member_file_name) == 0) | |
739 | { | |
740 | member_name = get_archive_member_name_at (nested_arch, | |
741 | arch->nested_member_origin, | |
742 | NULL); | |
743 | if (member_name != NULL) | |
744 | { | |
745 | free (member_file_name); | |
746 | return member_name; | |
747 | } | |
748 | } | |
749 | free (member_file_name); | |
750 | ||
751 | /* Last resort: just return the name of the nested archive. */ | |
752 | return arch->longnames + k; | |
753 | } | |
754 | ||
755 | /* We have a normal (short) name. */ | |
756 | for (j = 0; j < sizeof (arch->arhdr.ar_name); j++) | |
757 | if (arch->arhdr.ar_name[j] == '/') | |
758 | { | |
759 | arch->arhdr.ar_name[j] = '\0'; | |
760 | return arch->arhdr.ar_name; | |
761 | } | |
762 | ||
763 | /* The full ar_name field is used. Don't rely on ar_date starting | |
764 | with a zero byte. */ | |
765 | { | |
766 | char *name = xmalloc (sizeof (arch->arhdr.ar_name) + 1); | |
767 | memcpy (name, arch->arhdr.ar_name, sizeof (arch->arhdr.ar_name)); | |
768 | name[sizeof (arch->arhdr.ar_name)] = '\0'; | |
769 | return name; | |
770 | } | |
771 | } | |
772 | ||
773 | /* Get the name of an archive member at a given OFFSET within an archive | |
774 | ARCH. */ | |
775 | ||
776 | char * | |
777 | get_archive_member_name_at (struct archive_info *arch, | |
778 | unsigned long offset, | |
779 | struct archive_info *nested_arch) | |
780 | { | |
781 | size_t got; | |
782 | ||
783 | if (fseek (arch->file, offset, SEEK_SET) != 0) | |
784 | { | |
785 | error (_("%s: failed to seek to next file name\n"), arch->file_name); | |
786 | return NULL; | |
787 | } | |
788 | got = fread (&arch->arhdr, 1, sizeof arch->arhdr, arch->file); | |
789 | if (got != sizeof arch->arhdr) | |
790 | { | |
791 | error (_("%s: failed to read archive header\n"), arch->file_name); | |
792 | return NULL; | |
793 | } | |
794 | if (memcmp (arch->arhdr.ar_fmag, ARFMAG, 2) != 0) | |
795 | { | |
796 | error (_("%s: did not find a valid archive header\n"), | |
797 | arch->file_name); | |
798 | return NULL; | |
799 | } | |
800 | ||
801 | return get_archive_member_name (arch, nested_arch); | |
802 | } | |
803 | ||
804 | /* Construct a string showing the name of the archive member, qualified | |
805 | with the name of the containing archive file. For thin archives, we | |
806 | use square brackets to denote the indirection. For nested archives, | |
807 | we show the qualified name of the external member inside the square | |
808 | brackets (e.g., "thin.a[normal.a(foo.o)]"). */ | |
809 | ||
810 | char * | |
811 | make_qualified_name (struct archive_info * arch, | |
812 | struct archive_info * nested_arch, | |
813 | const char *member_name) | |
814 | { | |
a043396b | 815 | const char * error_name = _("<corrupt>"); |
3284fe0c L |
816 | size_t len; |
817 | char * name; | |
818 | ||
819 | len = strlen (arch->file_name) + strlen (member_name) + 3; | |
a043396b NC |
820 | if (arch->is_thin_archive |
821 | && arch->nested_member_origin != 0) | |
822 | { | |
823 | /* PR 15140: Allow for corrupt thin archives. */ | |
824 | if (nested_arch->file_name) | |
825 | len += strlen (nested_arch->file_name) + 2; | |
826 | else | |
827 | len += strlen (error_name) + 2; | |
828 | } | |
3284fe0c L |
829 | |
830 | name = (char *) malloc (len); | |
831 | if (name == NULL) | |
832 | { | |
833 | error (_("Out of memory\n")); | |
834 | return NULL; | |
835 | } | |
836 | ||
a043396b NC |
837 | if (arch->is_thin_archive |
838 | && arch->nested_member_origin != 0) | |
839 | { | |
840 | if (nested_arch->file_name) | |
841 | snprintf (name, len, "%s[%s(%s)]", arch->file_name, | |
842 | nested_arch->file_name, member_name); | |
843 | else | |
844 | snprintf (name, len, "%s[%s(%s)]", arch->file_name, | |
845 | error_name, member_name); | |
846 | } | |
3284fe0c L |
847 | else if (arch->is_thin_archive) |
848 | snprintf (name, len, "%s[%s]", arch->file_name, member_name); | |
849 | else | |
850 | snprintf (name, len, "%s(%s)", arch->file_name, member_name); | |
851 | ||
852 | return name; | |
853 | } |