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3284fe0c | 1 | /* elfcomm.c -- common code for ELF format file. |
fd67aa11 | 2 | Copyright (C) 2010-2024 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 | ||
81a65eb3 AM |
24 | /* Do not include bfd.h in this file. Functions in this file are used |
25 | by readelf.c and elfedit.c which define BFD64, and by objdump.c | |
26 | which doesn't. */ | |
645ba681 | 27 | |
3284fe0c L |
28 | #include "sysdep.h" |
29 | #include "libiberty.h" | |
24d127aa | 30 | #include "bfd.h" |
3284fe0c | 31 | #include "filenames.h" |
3284fe0c | 32 | #include "aout/ar.h" |
3284fe0c | 33 | #include "elfcomm.h" |
c2a7d3f5 | 34 | #include <assert.h> |
3284fe0c | 35 | |
81a65eb3 AM |
36 | extern char *program_name; |
37 | ||
3284fe0c L |
38 | void |
39 | error (const char *message, ...) | |
40 | { | |
41 | va_list args; | |
42 | ||
fafd911d NC |
43 | /* Try to keep error messages in sync with the program's normal output. */ |
44 | fflush (stdout); | |
45 | ||
3284fe0c L |
46 | va_start (args, message); |
47 | fprintf (stderr, _("%s: Error: "), program_name); | |
48 | vfprintf (stderr, message, args); | |
49 | va_end (args); | |
50 | } | |
51 | ||
52 | void | |
53 | warn (const char *message, ...) | |
54 | { | |
55 | va_list args; | |
56 | ||
fafd911d NC |
57 | /* Try to keep warning messages in sync with the program's normal output. */ |
58 | fflush (stdout); | |
3aade688 | 59 | |
3284fe0c L |
60 | va_start (args, message); |
61 | fprintf (stderr, _("%s: Warning: "), program_name); | |
62 | vfprintf (stderr, message, args); | |
63 | va_end (args); | |
64 | } | |
65 | ||
8e8d0b63 NC |
66 | void |
67 | inform (const char *message, ...) | |
68 | { | |
69 | va_list args; | |
70 | ||
71 | /* Try to keep info messages in sync with the program's normal output. */ | |
72 | fflush (stdout); | |
73 | ||
74 | va_start (args, message); | |
75 | fprintf (stderr, _("%s: Info: "), program_name); | |
76 | vfprintf (stderr, message, args); | |
77 | va_end (args); | |
78 | } | |
79 | ||
928c411d | 80 | void (*byte_put) (unsigned char *, uint64_t, unsigned int); |
3284fe0c L |
81 | |
82 | void | |
928c411d | 83 | byte_put_little_endian (unsigned char *field, uint64_t value, unsigned int size) |
3284fe0c | 84 | { |
928c411d | 85 | if (size > sizeof (uint64_t)) |
3284fe0c | 86 | { |
3284fe0c L |
87 | error (_("Unhandled data length: %d\n"), size); |
88 | abort (); | |
89 | } | |
5a805384 AM |
90 | while (size--) |
91 | { | |
92 | *field++ = value & 0xff; | |
93 | value >>= 8; | |
94 | } | |
3284fe0c L |
95 | } |
96 | ||
97 | void | |
928c411d | 98 | byte_put_big_endian (unsigned char *field, uint64_t value, unsigned int size) |
3284fe0c | 99 | { |
928c411d | 100 | if (size > sizeof (uint64_t)) |
3284fe0c | 101 | { |
3284fe0c L |
102 | error (_("Unhandled data length: %d\n"), size); |
103 | abort (); | |
104 | } | |
5a805384 AM |
105 | while (size--) |
106 | { | |
107 | field[size] = value & 0xff; | |
108 | value >>= 8; | |
109 | } | |
3284fe0c L |
110 | } |
111 | ||
928c411d | 112 | uint64_t (*byte_get) (const unsigned char *, unsigned int); |
3284fe0c | 113 | |
928c411d | 114 | uint64_t |
af2ddf69 | 115 | byte_get_little_endian (const unsigned char *field, unsigned int size) |
3284fe0c L |
116 | { |
117 | switch (size) | |
118 | { | |
119 | case 1: | |
120 | return *field; | |
121 | ||
122 | case 2: | |
928c411d AM |
123 | return ((uint64_t) field[0] |
124 | | ((uint64_t) field[1] << 8)); | |
3284fe0c L |
125 | |
126 | case 3: | |
928c411d AM |
127 | return ((uint64_t) field[0] |
128 | | ((uint64_t) field[1] << 8) | |
129 | | ((uint64_t) field[2] << 16)); | |
3284fe0c L |
130 | |
131 | case 4: | |
928c411d AM |
132 | return ((uint64_t) field[0] |
133 | | ((uint64_t) field[1] << 8) | |
134 | | ((uint64_t) field[2] << 16) | |
135 | | ((uint64_t) field[3] << 24)); | |
3284fe0c | 136 | |
87bc83b3 | 137 | case 5: |
928c411d AM |
138 | return ((uint64_t) field[0] |
139 | | ((uint64_t) field[1] << 8) | |
140 | | ((uint64_t) field[2] << 16) | |
141 | | ((uint64_t) field[3] << 24) | |
142 | | ((uint64_t) field[4] << 32)); | |
87bc83b3 CC |
143 | |
144 | case 6: | |
928c411d AM |
145 | return ((uint64_t) field[0] |
146 | | ((uint64_t) field[1] << 8) | |
147 | | ((uint64_t) field[2] << 16) | |
148 | | ((uint64_t) field[3] << 24) | |
149 | | ((uint64_t) field[4] << 32) | |
150 | | ((uint64_t) field[5] << 40)); | |
87bc83b3 CC |
151 | |
152 | case 7: | |
928c411d AM |
153 | return ((uint64_t) field[0] |
154 | | ((uint64_t) field[1] << 8) | |
155 | | ((uint64_t) field[2] << 16) | |
156 | | ((uint64_t) field[3] << 24) | |
157 | | ((uint64_t) field[4] << 32) | |
158 | | ((uint64_t) field[5] << 40) | |
159 | | ((uint64_t) field[6] << 48)); | |
87bc83b3 | 160 | |
3284fe0c | 161 | case 8: |
928c411d AM |
162 | return ((uint64_t) field[0] |
163 | | ((uint64_t) field[1] << 8) | |
164 | | ((uint64_t) field[2] << 16) | |
165 | | ((uint64_t) field[3] << 24) | |
166 | | ((uint64_t) field[4] << 32) | |
167 | | ((uint64_t) field[5] << 40) | |
168 | | ((uint64_t) field[6] << 48) | |
169 | | ((uint64_t) field[7] << 56)); | |
3284fe0c L |
170 | |
171 | default: | |
172 | error (_("Unhandled data length: %d\n"), size); | |
173 | abort (); | |
174 | } | |
175 | } | |
176 | ||
928c411d | 177 | uint64_t |
af2ddf69 | 178 | byte_get_big_endian (const unsigned char *field, unsigned int size) |
3284fe0c L |
179 | { |
180 | switch (size) | |
181 | { | |
182 | case 1: | |
183 | return *field; | |
184 | ||
185 | case 2: | |
928c411d AM |
186 | return ((uint64_t) field[1] |
187 | | ((uint64_t) field[0] << 8)); | |
3284fe0c L |
188 | |
189 | case 3: | |
928c411d AM |
190 | return ((uint64_t) field[2] |
191 | | ((uint64_t) field[1] << 8) | |
192 | | ((uint64_t) field[0] << 16)); | |
3284fe0c L |
193 | |
194 | case 4: | |
928c411d AM |
195 | return ((uint64_t) field[3] |
196 | | ((uint64_t) field[2] << 8) | |
197 | | ((uint64_t) field[1] << 16) | |
198 | | ((uint64_t) field[0] << 24)); | |
3284fe0c | 199 | |
87bc83b3 | 200 | case 5: |
928c411d AM |
201 | return ((uint64_t) field[4] |
202 | | ((uint64_t) field[3] << 8) | |
203 | | ((uint64_t) field[2] << 16) | |
204 | | ((uint64_t) field[1] << 24) | |
205 | | ((uint64_t) field[0] << 32)); | |
87bc83b3 CC |
206 | |
207 | case 6: | |
928c411d AM |
208 | return ((uint64_t) field[5] |
209 | | ((uint64_t) field[4] << 8) | |
210 | | ((uint64_t) field[3] << 16) | |
211 | | ((uint64_t) field[2] << 24) | |
212 | | ((uint64_t) field[1] << 32) | |
213 | | ((uint64_t) field[0] << 40)); | |
87bc83b3 CC |
214 | |
215 | case 7: | |
928c411d AM |
216 | return ((uint64_t) field[6] |
217 | | ((uint64_t) field[5] << 8) | |
218 | | ((uint64_t) field[4] << 16) | |
219 | | ((uint64_t) field[3] << 24) | |
220 | | ((uint64_t) field[2] << 32) | |
221 | | ((uint64_t) field[1] << 40) | |
222 | | ((uint64_t) field[0] << 48)); | |
87bc83b3 | 223 | |
3284fe0c | 224 | case 8: |
928c411d AM |
225 | return ((uint64_t) field[7] |
226 | | ((uint64_t) field[6] << 8) | |
227 | | ((uint64_t) field[5] << 16) | |
228 | | ((uint64_t) field[4] << 24) | |
229 | | ((uint64_t) field[3] << 32) | |
230 | | ((uint64_t) field[2] << 40) | |
231 | | ((uint64_t) field[1] << 48) | |
232 | | ((uint64_t) field[0] << 56)); | |
3284fe0c L |
233 | |
234 | default: | |
235 | error (_("Unhandled data length: %d\n"), size); | |
236 | abort (); | |
237 | } | |
238 | } | |
239 | ||
928c411d | 240 | uint64_t |
af2ddf69 | 241 | byte_get_signed (const unsigned char *field, unsigned int size) |
3284fe0c | 242 | { |
928c411d | 243 | uint64_t x = byte_get (field, size); |
3284fe0c L |
244 | |
245 | switch (size) | |
246 | { | |
247 | case 1: | |
248 | return (x ^ 0x80) - 0x80; | |
249 | case 2: | |
250 | return (x ^ 0x8000) - 0x8000; | |
87bc83b3 CC |
251 | case 3: |
252 | return (x ^ 0x800000) - 0x800000; | |
3284fe0c L |
253 | case 4: |
254 | return (x ^ 0x80000000) - 0x80000000; | |
87bc83b3 CC |
255 | case 5: |
256 | case 6: | |
257 | case 7: | |
3284fe0c | 258 | case 8: |
87bc83b3 CC |
259 | /* Reads of 5-, 6-, and 7-byte numbers are the result of |
260 | trying to read past the end of a buffer, and will therefore | |
261 | not have meaningful values, so we don't try to deal with | |
262 | the sign in these cases. */ | |
3284fe0c L |
263 | return x; |
264 | default: | |
265 | abort (); | |
266 | } | |
267 | } | |
268 | ||
269 | /* Return the path name for a proxy entry in a thin archive, adjusted | |
270 | relative to the path name of the thin archive itself if necessary. | |
271 | Always returns a pointer to malloc'ed memory. */ | |
272 | ||
273 | char * | |
274 | adjust_relative_path (const char *file_name, const char *name, | |
591f7597 | 275 | unsigned long name_len) |
3284fe0c L |
276 | { |
277 | char * member_file_name; | |
278 | const char * base_name = lbasename (file_name); | |
591f7597 | 279 | size_t amt; |
3284fe0c L |
280 | |
281 | /* This is a proxy entry for a thin archive member. | |
282 | If the extended name table contains an absolute path | |
283 | name, or if the archive is in the current directory, | |
284 | use the path name as given. Otherwise, we need to | |
285 | find the member relative to the directory where the | |
286 | archive is located. */ | |
287 | if (IS_ABSOLUTE_PATH (name) || base_name == file_name) | |
288 | { | |
591f7597 NC |
289 | amt = name_len + 1; |
290 | if (amt == 0) | |
291 | return NULL; | |
292 | member_file_name = (char *) malloc (amt); | |
3284fe0c L |
293 | if (member_file_name == NULL) |
294 | { | |
295 | error (_("Out of memory\n")); | |
296 | return NULL; | |
297 | } | |
298 | memcpy (member_file_name, name, name_len); | |
299 | member_file_name[name_len] = '\0'; | |
300 | } | |
301 | else | |
302 | { | |
303 | /* Concatenate the path components of the archive file name | |
304 | to the relative path name from the extended name table. */ | |
305 | size_t prefix_len = base_name - file_name; | |
591f7597 NC |
306 | |
307 | amt = prefix_len + name_len + 1; | |
308 | /* PR 17531: file: 2896dc8b | |
309 | Catch wraparound. */ | |
310 | if (amt < prefix_len || amt < name_len) | |
311 | { | |
312 | error (_("Abnormal length of thin archive member name: %lx\n"), | |
313 | name_len); | |
314 | return NULL; | |
315 | } | |
3aade688 | 316 | |
591f7597 | 317 | member_file_name = (char *) malloc (amt); |
3284fe0c L |
318 | if (member_file_name == NULL) |
319 | { | |
320 | error (_("Out of memory\n")); | |
321 | return NULL; | |
322 | } | |
323 | memcpy (member_file_name, file_name, prefix_len); | |
324 | memcpy (member_file_name + prefix_len, name, name_len); | |
325 | member_file_name[prefix_len + name_len] = '\0'; | |
326 | } | |
327 | return member_file_name; | |
328 | } | |
329 | ||
c2a7d3f5 NC |
330 | /* Processes the archive index table and symbol table in ARCH. |
331 | Entries in the index table are SIZEOF_AR_INDEX bytes long. | |
332 | Fills in ARCH->next_arhdr_offset and ARCH->arhdr. | |
333 | If READ_SYMBOLS is true then fills in ARCH->index_num, ARCH->index_array, | |
334 | ARCH->sym_size and ARCH->sym_table. | |
335 | It is the caller's responsibility to free ARCH->index_array and | |
336 | ARCH->sym_table. | |
81a65eb3 | 337 | Returns 1 upon success, 0 otherwise. |
c2a7d3f5 NC |
338 | If failure occurs an error message is printed. */ |
339 | ||
81a65eb3 AM |
340 | static int |
341 | process_archive_index_and_symbols (struct archive_info *arch, | |
342 | unsigned int sizeof_ar_index, | |
343 | int read_symbols) | |
c2a7d3f5 NC |
344 | { |
345 | size_t got; | |
346 | unsigned long size; | |
d91f0b20 | 347 | char fmag_save; |
c2a7d3f5 | 348 | |
d91f0b20 AM |
349 | fmag_save = arch->arhdr.ar_fmag[0]; |
350 | arch->arhdr.ar_fmag[0] = 0; | |
c2a7d3f5 | 351 | size = strtoul (arch->arhdr.ar_size, NULL, 10); |
d91f0b20 | 352 | arch->arhdr.ar_fmag[0] = fmag_save; |
591f7597 NC |
353 | /* PR 17531: file: 912bd7de. */ |
354 | if ((signed long) size < 0) | |
355 | { | |
356 | error (_("%s: invalid archive header size: %ld\n"), | |
357 | arch->file_name, size); | |
81a65eb3 | 358 | return 0; |
591f7597 NC |
359 | } |
360 | ||
c2a7d3f5 NC |
361 | size = size + (size & 1); |
362 | ||
363 | arch->next_arhdr_offset += sizeof arch->arhdr + size; | |
364 | ||
365 | if (! read_symbols) | |
366 | { | |
367 | if (fseek (arch->file, size, SEEK_CUR) != 0) | |
368 | { | |
369 | error (_("%s: failed to skip archive symbol table\n"), | |
370 | arch->file_name); | |
81a65eb3 | 371 | return 0; |
c2a7d3f5 NC |
372 | } |
373 | } | |
374 | else | |
375 | { | |
376 | unsigned long i; | |
377 | /* A buffer used to hold numbers read in from an archive index. | |
378 | These are always SIZEOF_AR_INDEX bytes long and stored in | |
379 | big-endian format. */ | |
380 | unsigned char integer_buffer[sizeof arch->index_num]; | |
381 | unsigned char * index_buffer; | |
382 | ||
383 | assert (sizeof_ar_index <= sizeof integer_buffer); | |
3aade688 | 384 | |
c2a7d3f5 NC |
385 | /* Check the size of the archive index. */ |
386 | if (size < sizeof_ar_index) | |
387 | { | |
388 | error (_("%s: the archive index is empty\n"), arch->file_name); | |
81a65eb3 | 389 | return 0; |
c2a7d3f5 NC |
390 | } |
391 | ||
392 | /* Read the number of entries in the archive index. */ | |
393 | got = fread (integer_buffer, 1, sizeof_ar_index, arch->file); | |
394 | if (got != sizeof_ar_index) | |
395 | { | |
396 | error (_("%s: failed to read archive index\n"), arch->file_name); | |
81a65eb3 | 397 | return 0; |
c2a7d3f5 NC |
398 | } |
399 | ||
400 | arch->index_num = byte_get_big_endian (integer_buffer, sizeof_ar_index); | |
401 | size -= sizeof_ar_index; | |
402 | ||
53774b7e NC |
403 | if (size < arch->index_num * sizeof_ar_index |
404 | /* PR 17531: file: 585515d1. */ | |
405 | || size < arch->index_num) | |
c2a7d3f5 | 406 | { |
53774b7e | 407 | error (_("%s: the archive index is supposed to have 0x%lx entries of %d bytes, but the size is only 0x%lx\n"), |
c2a7d3f5 | 408 | arch->file_name, (long) arch->index_num, sizeof_ar_index, size); |
81a65eb3 | 409 | return 0; |
c2a7d3f5 NC |
410 | } |
411 | ||
412 | /* Read in the archive index. */ | |
413 | index_buffer = (unsigned char *) | |
414 | malloc (arch->index_num * sizeof_ar_index); | |
415 | if (index_buffer == NULL) | |
416 | { | |
417 | error (_("Out of memory whilst trying to read archive symbol index\n")); | |
81a65eb3 | 418 | return 0; |
c2a7d3f5 NC |
419 | } |
420 | ||
421 | got = fread (index_buffer, sizeof_ar_index, arch->index_num, arch->file); | |
422 | if (got != arch->index_num) | |
423 | { | |
424 | free (index_buffer); | |
425 | error (_("%s: failed to read archive index\n"), arch->file_name); | |
81a65eb3 | 426 | return 0; |
c2a7d3f5 NC |
427 | } |
428 | ||
429 | size -= arch->index_num * sizeof_ar_index; | |
430 | ||
431 | /* Convert the index numbers into the host's numeric format. */ | |
928c411d AM |
432 | arch->index_array = (uint64_t *) |
433 | malloc (arch->index_num * sizeof (*arch->index_array)); | |
c2a7d3f5 NC |
434 | if (arch->index_array == NULL) |
435 | { | |
436 | free (index_buffer); | |
437 | error (_("Out of memory whilst trying to convert the archive symbol index\n")); | |
81a65eb3 | 438 | return 0; |
c2a7d3f5 NC |
439 | } |
440 | ||
441 | for (i = 0; i < arch->index_num; i++) | |
442 | arch->index_array[i] = | |
443 | byte_get_big_endian ((unsigned char *) (index_buffer + (i * sizeof_ar_index)), | |
444 | sizeof_ar_index); | |
445 | free (index_buffer); | |
446 | ||
447 | /* The remaining space in the header is taken up by the symbol table. */ | |
448 | if (size < 1) | |
449 | { | |
450 | error (_("%s: the archive has an index but no symbols\n"), | |
451 | arch->file_name); | |
81a65eb3 | 452 | return 0; |
c2a7d3f5 NC |
453 | } |
454 | ||
455 | arch->sym_table = (char *) malloc (size); | |
456 | if (arch->sym_table == NULL) | |
457 | { | |
458 | error (_("Out of memory whilst trying to read archive index symbol table\n")); | |
81a65eb3 | 459 | return 0; |
c2a7d3f5 NC |
460 | } |
461 | ||
462 | arch->sym_size = size; | |
463 | got = fread (arch->sym_table, 1, size, arch->file); | |
464 | if (got != size) | |
465 | { | |
466 | error (_("%s: failed to read archive index symbol table\n"), | |
467 | arch->file_name); | |
81a65eb3 | 468 | return 0; |
c2a7d3f5 NC |
469 | } |
470 | } | |
471 | ||
472 | /* Read the next archive header. */ | |
473 | got = fread (&arch->arhdr, 1, sizeof arch->arhdr, arch->file); | |
474 | if (got != sizeof arch->arhdr && got != 0) | |
475 | { | |
476 | error (_("%s: failed to read archive header following archive index\n"), | |
477 | arch->file_name); | |
81a65eb3 | 478 | return 0; |
c2a7d3f5 NC |
479 | } |
480 | ||
81a65eb3 | 481 | return 1; |
c2a7d3f5 NC |
482 | } |
483 | ||
3284fe0c L |
484 | /* Read the symbol table and long-name table from an archive. */ |
485 | ||
486 | int | |
487 | setup_archive (struct archive_info *arch, const char *file_name, | |
645ba681 | 488 | FILE *file, off_t file_size, |
81a65eb3 | 489 | int is_thin_archive, int read_symbols) |
3284fe0c L |
490 | { |
491 | size_t got; | |
3284fe0c L |
492 | |
493 | arch->file_name = strdup (file_name); | |
494 | arch->file = file; | |
495 | arch->index_num = 0; | |
496 | arch->index_array = NULL; | |
497 | arch->sym_table = NULL; | |
498 | arch->sym_size = 0; | |
499 | arch->longnames = NULL; | |
500 | arch->longnames_size = 0; | |
501 | arch->nested_member_origin = 0; | |
502 | arch->is_thin_archive = is_thin_archive; | |
81a65eb3 | 503 | arch->uses_64bit_indices = 0; |
3284fe0c L |
504 | arch->next_arhdr_offset = SARMAG; |
505 | ||
506 | /* Read the first archive member header. */ | |
507 | if (fseek (file, SARMAG, SEEK_SET) != 0) | |
508 | { | |
509 | error (_("%s: failed to seek to first archive header\n"), file_name); | |
510 | return 1; | |
511 | } | |
512 | got = fread (&arch->arhdr, 1, sizeof arch->arhdr, file); | |
513 | if (got != sizeof arch->arhdr) | |
514 | { | |
515 | if (got == 0) | |
516 | return 0; | |
517 | ||
518 | error (_("%s: failed to read archive header\n"), file_name); | |
519 | return 1; | |
520 | } | |
521 | ||
522 | /* See if this is the archive symbol table. */ | |
24d127aa | 523 | if (startswith (arch->arhdr.ar_name, "/ ")) |
3284fe0c | 524 | { |
c2a7d3f5 NC |
525 | if (! process_archive_index_and_symbols (arch, 4, read_symbols)) |
526 | return 1; | |
527 | } | |
24d127aa | 528 | else if (startswith (arch->arhdr.ar_name, "/SYM64/ ")) |
c2a7d3f5 | 529 | { |
81a65eb3 | 530 | arch->uses_64bit_indices = 1; |
c2a7d3f5 NC |
531 | if (! process_archive_index_and_symbols (arch, 8, read_symbols)) |
532 | return 1; | |
3284fe0c L |
533 | } |
534 | else if (read_symbols) | |
535 | printf (_("%s has no archive index\n"), file_name); | |
536 | ||
24d127aa | 537 | if (startswith (arch->arhdr.ar_name, "// ")) |
3284fe0c L |
538 | { |
539 | /* This is the archive string table holding long member names. */ | |
d91f0b20 AM |
540 | char fmag_save = arch->arhdr.ar_fmag[0]; |
541 | arch->arhdr.ar_fmag[0] = 0; | |
3284fe0c | 542 | arch->longnames_size = strtoul (arch->arhdr.ar_size, NULL, 10); |
d91f0b20 | 543 | arch->arhdr.ar_fmag[0] = fmag_save; |
591f7597 NC |
544 | /* PR 17531: file: 01068045. */ |
545 | if (arch->longnames_size < 8) | |
546 | { | |
26c527e6 | 547 | error (_("%s: long name table is too small, (size = %" PRId64 ")\n"), |
591f7597 NC |
548 | file_name, arch->longnames_size); |
549 | return 1; | |
550 | } | |
058037d3 | 551 | /* PR 17531: file: 639d6a26. */ |
645ba681 | 552 | if ((off_t) arch->longnames_size > file_size |
780f96ae | 553 | || (signed long) arch->longnames_size < 0) |
058037d3 | 554 | { |
26c527e6 | 555 | error (_("%s: long name table is too big, (size = %#" PRIx64 ")\n"), |
058037d3 NC |
556 | file_name, arch->longnames_size); |
557 | return 1; | |
558 | } | |
559 | ||
3284fe0c L |
560 | arch->next_arhdr_offset += sizeof arch->arhdr + arch->longnames_size; |
561 | ||
591f7597 NC |
562 | /* Plus one to allow for a string terminator. */ |
563 | arch->longnames = (char *) malloc (arch->longnames_size + 1); | |
3284fe0c L |
564 | if (arch->longnames == NULL) |
565 | { | |
566 | error (_("Out of memory reading long symbol names in archive\n")); | |
567 | return 1; | |
568 | } | |
569 | ||
570 | if (fread (arch->longnames, arch->longnames_size, 1, file) != 1) | |
571 | { | |
572 | free (arch->longnames); | |
573 | arch->longnames = NULL; | |
574 | error (_("%s: failed to read long symbol name string table\n"), | |
575 | file_name); | |
576 | return 1; | |
577 | } | |
578 | ||
579 | if ((arch->longnames_size & 1) != 0) | |
580 | getc (file); | |
058037d3 NC |
581 | |
582 | arch->longnames[arch->longnames_size] = 0; | |
3284fe0c L |
583 | } |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
588 | /* Open and setup a nested archive, if not already open. */ | |
589 | ||
590 | int | |
591 | setup_nested_archive (struct archive_info *nested_arch, | |
592 | const char *member_file_name) | |
593 | { | |
594 | FILE * member_file; | |
780f96ae | 595 | struct stat statbuf; |
3284fe0c L |
596 | |
597 | /* Have we already setup this archive? */ | |
598 | if (nested_arch->file_name != NULL | |
599 | && streq (nested_arch->file_name, member_file_name)) | |
600 | return 0; | |
601 | ||
602 | /* Close previous file and discard cached information. */ | |
603 | if (nested_arch->file != NULL) | |
cfc16775 AM |
604 | { |
605 | fclose (nested_arch->file); | |
606 | nested_arch->file = NULL; | |
607 | } | |
3284fe0c L |
608 | release_archive (nested_arch); |
609 | ||
610 | member_file = fopen (member_file_name, "rb"); | |
611 | if (member_file == NULL) | |
612 | return 1; | |
780f96ae AM |
613 | if (fstat (fileno (member_file), &statbuf) < 0) |
614 | return 1; | |
3284fe0c | 615 | return setup_archive (nested_arch, member_file_name, member_file, |
81a65eb3 | 616 | statbuf.st_size, 0, 0); |
3284fe0c L |
617 | } |
618 | ||
619 | /* Release the memory used for the archive information. */ | |
620 | ||
621 | void | |
622 | release_archive (struct archive_info * arch) | |
623 | { | |
9db70fc3 AM |
624 | free (arch->file_name); |
625 | free (arch->index_array); | |
626 | free (arch->sym_table); | |
627 | free (arch->longnames); | |
cfc16775 AM |
628 | arch->file_name = NULL; |
629 | arch->index_array = NULL; | |
630 | arch->sym_table = NULL; | |
631 | arch->longnames = NULL; | |
3284fe0c L |
632 | } |
633 | ||
634 | /* Get the name of an archive member from the current archive header. | |
635 | For simple names, this will modify the ar_name field of the current | |
636 | archive header. For long names, it will return a pointer to the | |
637 | longnames table. For nested archives, it will open the nested archive | |
638 | and get the name recursively. NESTED_ARCH is a single-entry cache so | |
639 | we don't keep rereading the same information from a nested archive. */ | |
640 | ||
641 | char * | |
642 | get_archive_member_name (struct archive_info *arch, | |
643 | struct archive_info *nested_arch) | |
644 | { | |
645 | unsigned long j, k; | |
646 | ||
647 | if (arch->arhdr.ar_name[0] == '/') | |
648 | { | |
649 | /* We have a long name. */ | |
650 | char *endp; | |
651 | char *member_file_name; | |
652 | char *member_name; | |
d91f0b20 | 653 | char fmag_save; |
3284fe0c | 654 | |
907b01b7 NC |
655 | if (arch->longnames == NULL || arch->longnames_size == 0) |
656 | { | |
657 | error (_("Archive member uses long names, but no longname table found\n")); | |
658 | return NULL; | |
659 | } | |
3aade688 | 660 | |
3284fe0c | 661 | arch->nested_member_origin = 0; |
d91f0b20 AM |
662 | fmag_save = arch->arhdr.ar_fmag[0]; |
663 | arch->arhdr.ar_fmag[0] = 0; | |
3284fe0c L |
664 | k = j = strtoul (arch->arhdr.ar_name + 1, &endp, 10); |
665 | if (arch->is_thin_archive && endp != NULL && * endp == ':') | |
666 | arch->nested_member_origin = strtoul (endp + 1, NULL, 10); | |
d91f0b20 | 667 | arch->arhdr.ar_fmag[0] = fmag_save; |
3284fe0c | 668 | |
591f7597 NC |
669 | if (j > arch->longnames_size) |
670 | { | |
671 | error (_("Found long name index (%ld) beyond end of long name table\n"),j); | |
672 | return NULL; | |
673 | } | |
3284fe0c L |
674 | while ((j < arch->longnames_size) |
675 | && (arch->longnames[j] != '\n') | |
676 | && (arch->longnames[j] != '\0')) | |
677 | j++; | |
591f7597 | 678 | if (j > 0 && arch->longnames[j-1] == '/') |
3284fe0c | 679 | j--; |
591f7597 NC |
680 | if (j > arch->longnames_size) |
681 | j = arch->longnames_size; | |
3284fe0c L |
682 | arch->longnames[j] = '\0'; |
683 | ||
684 | if (!arch->is_thin_archive || arch->nested_member_origin == 0) | |
fd486f32 | 685 | return xstrdup (arch->longnames + k); |
3284fe0c | 686 | |
591f7597 NC |
687 | /* PR 17531: file: 2896dc8b. */ |
688 | if (k >= j) | |
689 | { | |
690 | error (_("Invalid Thin archive member name\n")); | |
691 | return NULL; | |
692 | } | |
3aade688 | 693 | |
3284fe0c L |
694 | /* This is a proxy for a member of a nested archive. |
695 | Find the name of the member in that archive. */ | |
696 | member_file_name = adjust_relative_path (arch->file_name, | |
697 | arch->longnames + k, j - k); | |
698 | if (member_file_name != NULL | |
699 | && setup_nested_archive (nested_arch, member_file_name) == 0) | |
700 | { | |
fd486f32 | 701 | member_name = get_archive_member_name_at (nested_arch, |
3284fe0c L |
702 | arch->nested_member_origin, |
703 | NULL); | |
704 | if (member_name != NULL) | |
705 | { | |
706 | free (member_file_name); | |
707 | return member_name; | |
708 | } | |
709 | } | |
710 | free (member_file_name); | |
711 | ||
712 | /* Last resort: just return the name of the nested archive. */ | |
fd486f32 | 713 | return xstrdup (arch->longnames + k); |
3284fe0c L |
714 | } |
715 | ||
716 | /* We have a normal (short) name. */ | |
717 | for (j = 0; j < sizeof (arch->arhdr.ar_name); j++) | |
718 | if (arch->arhdr.ar_name[j] == '/') | |
719 | { | |
720 | arch->arhdr.ar_name[j] = '\0'; | |
fd486f32 | 721 | return xstrdup (arch->arhdr.ar_name); |
3284fe0c L |
722 | } |
723 | ||
724 | /* The full ar_name field is used. Don't rely on ar_date starting | |
725 | with a zero byte. */ | |
726 | { | |
727 | char *name = xmalloc (sizeof (arch->arhdr.ar_name) + 1); | |
728 | memcpy (name, arch->arhdr.ar_name, sizeof (arch->arhdr.ar_name)); | |
729 | name[sizeof (arch->arhdr.ar_name)] = '\0'; | |
730 | return name; | |
731 | } | |
732 | } | |
733 | ||
734 | /* Get the name of an archive member at a given OFFSET within an archive | |
735 | ARCH. */ | |
736 | ||
737 | char * | |
738 | get_archive_member_name_at (struct archive_info *arch, | |
739 | unsigned long offset, | |
740 | struct archive_info *nested_arch) | |
741 | { | |
742 | size_t got; | |
743 | ||
744 | if (fseek (arch->file, offset, SEEK_SET) != 0) | |
745 | { | |
746 | error (_("%s: failed to seek to next file name\n"), arch->file_name); | |
747 | return NULL; | |
748 | } | |
749 | got = fread (&arch->arhdr, 1, sizeof arch->arhdr, arch->file); | |
750 | if (got != sizeof arch->arhdr) | |
751 | { | |
752 | error (_("%s: failed to read archive header\n"), arch->file_name); | |
753 | return NULL; | |
754 | } | |
755 | if (memcmp (arch->arhdr.ar_fmag, ARFMAG, 2) != 0) | |
756 | { | |
757 | error (_("%s: did not find a valid archive header\n"), | |
758 | arch->file_name); | |
759 | return NULL; | |
760 | } | |
761 | ||
762 | return get_archive_member_name (arch, nested_arch); | |
763 | } | |
764 | ||
765 | /* Construct a string showing the name of the archive member, qualified | |
766 | with the name of the containing archive file. For thin archives, we | |
767 | use square brackets to denote the indirection. For nested archives, | |
768 | we show the qualified name of the external member inside the square | |
769 | brackets (e.g., "thin.a[normal.a(foo.o)]"). */ | |
770 | ||
771 | char * | |
772 | make_qualified_name (struct archive_info * arch, | |
773 | struct archive_info * nested_arch, | |
774 | const char *member_name) | |
775 | { | |
a043396b | 776 | const char * error_name = _("<corrupt>"); |
3284fe0c L |
777 | size_t len; |
778 | char * name; | |
779 | ||
780 | len = strlen (arch->file_name) + strlen (member_name) + 3; | |
a043396b NC |
781 | if (arch->is_thin_archive |
782 | && arch->nested_member_origin != 0) | |
783 | { | |
784 | /* PR 15140: Allow for corrupt thin archives. */ | |
785 | if (nested_arch->file_name) | |
786 | len += strlen (nested_arch->file_name) + 2; | |
787 | else | |
788 | len += strlen (error_name) + 2; | |
789 | } | |
3284fe0c L |
790 | |
791 | name = (char *) malloc (len); | |
792 | if (name == NULL) | |
793 | { | |
794 | error (_("Out of memory\n")); | |
795 | return NULL; | |
796 | } | |
797 | ||
a043396b NC |
798 | if (arch->is_thin_archive |
799 | && arch->nested_member_origin != 0) | |
800 | { | |
801 | if (nested_arch->file_name) | |
802 | snprintf (name, len, "%s[%s(%s)]", arch->file_name, | |
803 | nested_arch->file_name, member_name); | |
804 | else | |
805 | snprintf (name, len, "%s[%s(%s)]", arch->file_name, | |
3aade688 | 806 | error_name, member_name); |
a043396b | 807 | } |
3284fe0c L |
808 | else if (arch->is_thin_archive) |
809 | snprintf (name, len, "%s[%s]", arch->file_name, member_name); | |
810 | else | |
811 | snprintf (name, len, "%s(%s)", arch->file_name, member_name); | |
812 | ||
813 | return name; | |
814 | } |