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30fd33bb L |
1 | /* elfedit.c -- Update the ELF header of an ELF format file |
2 | Copyright 2010 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Binutils. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA | |
20 | 02110-1301, USA. */ | |
21 | \f | |
22 | #include "config.h" | |
23 | #include "sysdep.h" | |
24 | #include <assert.h> | |
25 | #include <sys/stat.h> | |
26 | ||
27 | #if __GNUC__ >= 2 | |
28 | /* Define BFD64 here, even if our default architecture is 32 bit ELF | |
29 | as this will allow us to read in and parse 64bit and 32bit ELF files. | |
30 | Only do this if we believe that the compiler can support a 64 bit | |
31 | data type. For now we only rely on GCC being able to do this. */ | |
32 | #define BFD64 | |
33 | #endif | |
34 | ||
35 | #include "bfd.h" | |
36 | #include "bucomm.h" | |
37 | ||
38 | #include "elf/common.h" | |
39 | #include "elf/external.h" | |
40 | #include "elf/internal.h" | |
41 | ||
42 | ||
43 | #include "aout/ar.h" | |
44 | ||
45 | #include "getopt.h" | |
46 | #include "libiberty.h" | |
47 | #include "safe-ctype.h" | |
48 | #include "filenames.h" | |
49 | ||
50 | char * program_name = "elfedit"; | |
51 | static long archive_file_offset; | |
52 | static unsigned long archive_file_size; | |
53 | static Elf_Internal_Ehdr elf_header; | |
54 | static Elf32_External_Ehdr ehdr32; | |
55 | static Elf64_External_Ehdr ehdr64; | |
56 | static int input_elf_machine = -1; | |
57 | static int output_elf_machine = -1; | |
dd35de74 L |
58 | static int input_elf_type = -1; |
59 | static int output_elf_type = -1; | |
30fd33bb L |
60 | static int input_elf_class = -1; |
61 | ||
62 | #define streq(a,b) (strcmp ((a), (b)) == 0) | |
63 | #define strneq(a,b,n) (strncmp ((a), (b), (n)) == 0) | |
64 | #define const_strneq(a,b) (strncmp ((a), (b), sizeof (b) - 1) == 0) | |
65 | ||
66 | void | |
67 | non_fatal (const char *message, ...) | |
68 | { | |
69 | va_list args; | |
70 | ||
71 | va_start (args, message); | |
72 | fprintf (stderr, _("%s: Error: "), program_name); | |
73 | vfprintf (stderr, message, args); | |
74 | va_end (args); | |
75 | } | |
76 | ||
77 | #define BYTE_GET(field) byte_get (field, sizeof (field)) | |
78 | #define BYTE_PUT(field, val) byte_put (field, val, sizeof (field)) | |
79 | ||
80 | static bfd_vma (*byte_get) (unsigned char *, int); | |
81 | static void (*byte_put) (unsigned char *, bfd_vma, int); | |
82 | ||
83 | static bfd_vma | |
84 | byte_get_little_endian (unsigned char *field, int size) | |
85 | { | |
86 | switch (size) | |
87 | { | |
88 | case 1: | |
89 | return *field; | |
90 | ||
91 | case 2: | |
92 | return ((unsigned int) (field[0])) | |
93 | | (((unsigned int) (field[1])) << 8); | |
94 | ||
95 | case 4: | |
96 | return ((unsigned long) (field[0])) | |
97 | | (((unsigned long) (field[1])) << 8) | |
98 | | (((unsigned long) (field[2])) << 16) | |
99 | | (((unsigned long) (field[3])) << 24); | |
100 | ||
101 | case 8: | |
102 | if (sizeof (bfd_vma) == 8) | |
103 | return ((bfd_vma) (field[0])) | |
104 | | (((bfd_vma) (field[1])) << 8) | |
105 | | (((bfd_vma) (field[2])) << 16) | |
106 | | (((bfd_vma) (field[3])) << 24) | |
107 | | (((bfd_vma) (field[4])) << 32) | |
108 | | (((bfd_vma) (field[5])) << 40) | |
109 | | (((bfd_vma) (field[6])) << 48) | |
110 | | (((bfd_vma) (field[7])) << 56); | |
111 | else if (sizeof (bfd_vma) == 4) | |
112 | /* We want to extract data from an 8 byte wide field and | |
113 | place it into a 4 byte wide field. Since this is a little | |
114 | endian source we can just use the 4 byte extraction code. */ | |
115 | return ((unsigned long) (field[0])) | |
116 | | (((unsigned long) (field[1])) << 8) | |
117 | | (((unsigned long) (field[2])) << 16) | |
118 | | (((unsigned long) (field[3])) << 24); | |
119 | ||
120 | default: | |
121 | non_fatal (_("Unhandled data length: %d\n"), size); | |
122 | abort (); | |
123 | } | |
124 | } | |
125 | ||
126 | static bfd_vma | |
127 | byte_get_big_endian (unsigned char *field, int size) | |
128 | { | |
129 | switch (size) | |
130 | { | |
131 | case 1: | |
132 | return *field; | |
133 | ||
134 | case 2: | |
135 | return ((unsigned int) (field[1])) | (((int) (field[0])) << 8); | |
136 | ||
137 | case 4: | |
138 | return ((unsigned long) (field[3])) | |
139 | | (((unsigned long) (field[2])) << 8) | |
140 | | (((unsigned long) (field[1])) << 16) | |
141 | | (((unsigned long) (field[0])) << 24); | |
142 | ||
143 | case 8: | |
144 | if (sizeof (bfd_vma) == 8) | |
145 | return ((bfd_vma) (field[7])) | |
146 | | (((bfd_vma) (field[6])) << 8) | |
147 | | (((bfd_vma) (field[5])) << 16) | |
148 | | (((bfd_vma) (field[4])) << 24) | |
149 | | (((bfd_vma) (field[3])) << 32) | |
150 | | (((bfd_vma) (field[2])) << 40) | |
151 | | (((bfd_vma) (field[1])) << 48) | |
152 | | (((bfd_vma) (field[0])) << 56); | |
153 | else if (sizeof (bfd_vma) == 4) | |
154 | { | |
155 | /* Although we are extracing data from an 8 byte wide field, | |
156 | we are returning only 4 bytes of data. */ | |
157 | field += 4; | |
158 | return ((unsigned long) (field[3])) | |
159 | | (((unsigned long) (field[2])) << 8) | |
160 | | (((unsigned long) (field[1])) << 16) | |
161 | | (((unsigned long) (field[0])) << 24); | |
162 | } | |
163 | ||
164 | default: | |
165 | non_fatal (_("Unhandled data length: %d\n"), size); | |
166 | abort (); | |
167 | } | |
168 | } | |
169 | ||
170 | static void | |
171 | byte_put_little_endian (unsigned char * field, bfd_vma value, int size) | |
172 | { | |
173 | switch (size) | |
174 | { | |
175 | case 8: | |
176 | field[7] = (((value >> 24) >> 24) >> 8) & 0xff; | |
177 | field[6] = ((value >> 24) >> 24) & 0xff; | |
178 | field[5] = ((value >> 24) >> 16) & 0xff; | |
179 | field[4] = ((value >> 24) >> 8) & 0xff; | |
180 | /* Fall through. */ | |
181 | case 4: | |
182 | field[3] = (value >> 24) & 0xff; | |
183 | field[2] = (value >> 16) & 0xff; | |
184 | /* Fall through. */ | |
185 | case 2: | |
186 | field[1] = (value >> 8) & 0xff; | |
187 | /* Fall through. */ | |
188 | case 1: | |
189 | field[0] = value & 0xff; | |
190 | break; | |
191 | ||
192 | default: | |
193 | non_fatal (_("Unhandled data length: %d\n"), size); | |
194 | abort (); | |
195 | } | |
196 | } | |
197 | ||
198 | static void | |
199 | byte_put_big_endian (unsigned char * field, bfd_vma value, int size) | |
200 | { | |
201 | switch (size) | |
202 | { | |
203 | case 8: | |
204 | field[7] = value & 0xff; | |
205 | field[6] = (value >> 8) & 0xff; | |
206 | field[5] = (value >> 16) & 0xff; | |
207 | field[4] = (value >> 24) & 0xff; | |
208 | value >>= 16; | |
209 | value >>= 16; | |
210 | /* Fall through. */ | |
211 | case 4: | |
212 | field[3] = value & 0xff; | |
213 | field[2] = (value >> 8) & 0xff; | |
214 | value >>= 16; | |
215 | /* Fall through. */ | |
216 | case 2: | |
217 | field[1] = value & 0xff; | |
218 | value >>= 8; | |
219 | /* Fall through. */ | |
220 | case 1: | |
221 | field[0] = value & 0xff; | |
222 | break; | |
223 | ||
224 | default: | |
225 | non_fatal (_("Unhandled data length: %d\n"), size); | |
226 | abort (); | |
227 | } | |
228 | } | |
229 | ||
230 | static int | |
231 | update_elf_header (const char *file_name, FILE *file) | |
232 | { | |
dd35de74 | 233 | int class, machine, type, status; |
30fd33bb L |
234 | |
235 | if (elf_header.e_ident[EI_MAG0] != ELFMAG0 | |
236 | || elf_header.e_ident[EI_MAG1] != ELFMAG1 | |
237 | || elf_header.e_ident[EI_MAG2] != ELFMAG2 | |
238 | || elf_header.e_ident[EI_MAG3] != ELFMAG3) | |
239 | { | |
240 | non_fatal | |
241 | (_("%s: Not an ELF file - wrong magic bytes at the start\n"), | |
242 | file_name); | |
243 | return 0; | |
244 | } | |
245 | ||
246 | if (elf_header.e_ident[EI_VERSION] != EV_CURRENT) | |
247 | { | |
248 | non_fatal | |
249 | (_("%s: Unsupported EI_VERSION: %d is not %d\n"), | |
250 | file_name, elf_header.e_ident[EI_VERSION], | |
251 | EV_CURRENT); | |
252 | return 0; | |
253 | } | |
254 | ||
2dc654c3 L |
255 | /* Return if e_machine is the same as output_elf_machine. */ |
256 | if (output_elf_machine == elf_header.e_machine) | |
257 | return 1; | |
258 | ||
259 | class = elf_header.e_ident[EI_CLASS]; | |
260 | ||
30fd33bb | 261 | /* Skip if class doesn't match. */ |
2dc654c3 | 262 | if (input_elf_class != -1 && class != input_elf_class) |
30fd33bb L |
263 | { |
264 | non_fatal | |
265 | (_("%s: Unmatched EI_CLASS: %d is not %d\n"), | |
2dc654c3 | 266 | file_name, class, input_elf_class); |
30fd33bb L |
267 | return 0; |
268 | } | |
269 | ||
2dc654c3 | 270 | machine = elf_header.e_machine; |
30fd33bb L |
271 | |
272 | /* Skip if e_machine doesn't match. */ | |
2dc654c3 | 273 | if (input_elf_machine != -1 && machine != input_elf_machine) |
30fd33bb L |
274 | { |
275 | non_fatal | |
276 | (_("%s: Unmatched e_machine: %d is not %d\n"), | |
2dc654c3 | 277 | file_name, machine, input_elf_machine); |
30fd33bb L |
278 | return 0; |
279 | } | |
280 | ||
dd35de74 L |
281 | type = elf_header.e_type; |
282 | ||
283 | /* Skip if e_type doesn't match. */ | |
284 | if (input_elf_type != -1 && type != input_elf_type) | |
285 | { | |
286 | non_fatal | |
287 | (_("%s: Unmatched e_type: %d is not %d\n"), | |
288 | file_name, type, input_elf_type); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | /* Update e_machine and e_type. */ | |
2dc654c3 | 293 | switch (class) |
30fd33bb L |
294 | { |
295 | default: | |
296 | /* We should never get here. */ | |
297 | abort (); | |
298 | break; | |
299 | case ELFCLASS32: | |
dd35de74 L |
300 | if (output_elf_machine != -1) |
301 | BYTE_PUT (ehdr32.e_machine, output_elf_machine); | |
302 | if (output_elf_type != -1) | |
303 | BYTE_PUT (ehdr32.e_type, output_elf_type); | |
30fd33bb L |
304 | status = fwrite (&ehdr32, sizeof (ehdr32), 1, file) == 1; |
305 | break; | |
306 | case ELFCLASS64: | |
dd35de74 L |
307 | if (output_elf_machine != -1) |
308 | BYTE_PUT (ehdr64.e_machine, output_elf_machine); | |
309 | if (output_elf_type != -1) | |
310 | BYTE_PUT (ehdr64.e_type, output_elf_type); | |
30fd33bb L |
311 | status = fwrite (&ehdr64, sizeof (ehdr64), 1, file) == 1; |
312 | break; | |
313 | } | |
314 | ||
315 | if (status != 1) | |
316 | non_fatal (_("%s: Failed to update ELF header: %s\n"), | |
317 | file_name, strerror (errno)); | |
318 | ||
319 | return status; | |
320 | } | |
321 | ||
322 | static int | |
323 | get_file_header (FILE * file) | |
324 | { | |
325 | /* Read in the identity array. */ | |
326 | if (fread (elf_header.e_ident, EI_NIDENT, 1, file) != 1) | |
327 | return 0; | |
328 | ||
329 | /* Determine how to read the rest of the header. */ | |
330 | switch (elf_header.e_ident[EI_DATA]) | |
331 | { | |
332 | default: /* fall through */ | |
333 | case ELFDATANONE: /* fall through */ | |
334 | case ELFDATA2LSB: | |
335 | byte_get = byte_get_little_endian; | |
336 | byte_put = byte_put_little_endian; | |
337 | break; | |
338 | case ELFDATA2MSB: | |
339 | byte_get = byte_get_big_endian; | |
340 | byte_put = byte_put_big_endian; | |
341 | break; | |
342 | } | |
343 | ||
344 | /* Read in the rest of the header. For now we only support 32 bit | |
345 | and 64 bit ELF files. */ | |
346 | switch (elf_header.e_ident[EI_CLASS]) | |
347 | { | |
348 | default: | |
349 | non_fatal (_("Unsupported EI_CLASS: %d\n"), | |
350 | elf_header.e_ident[EI_CLASS]); | |
351 | return 0; | |
352 | ||
353 | case ELFCLASS32: | |
354 | if (fread (ehdr32.e_type, sizeof (ehdr32) - EI_NIDENT, | |
355 | 1, file) != 1) | |
356 | return 0; | |
357 | ||
358 | elf_header.e_type = BYTE_GET (ehdr32.e_type); | |
359 | elf_header.e_machine = BYTE_GET (ehdr32.e_machine); | |
360 | elf_header.e_version = BYTE_GET (ehdr32.e_version); | |
361 | elf_header.e_entry = BYTE_GET (ehdr32.e_entry); | |
362 | elf_header.e_phoff = BYTE_GET (ehdr32.e_phoff); | |
363 | elf_header.e_shoff = BYTE_GET (ehdr32.e_shoff); | |
364 | elf_header.e_flags = BYTE_GET (ehdr32.e_flags); | |
365 | elf_header.e_ehsize = BYTE_GET (ehdr32.e_ehsize); | |
366 | elf_header.e_phentsize = BYTE_GET (ehdr32.e_phentsize); | |
367 | elf_header.e_phnum = BYTE_GET (ehdr32.e_phnum); | |
368 | elf_header.e_shentsize = BYTE_GET (ehdr32.e_shentsize); | |
369 | elf_header.e_shnum = BYTE_GET (ehdr32.e_shnum); | |
370 | elf_header.e_shstrndx = BYTE_GET (ehdr32.e_shstrndx); | |
371 | ||
372 | memcpy (&ehdr32, &elf_header, EI_NIDENT); | |
373 | break; | |
374 | ||
375 | case ELFCLASS64: | |
376 | /* If we have been compiled with sizeof (bfd_vma) == 4, then | |
377 | we will not be able to cope with the 64bit data found in | |
378 | 64 ELF files. Detect this now and abort before we start | |
379 | overwriting things. */ | |
380 | if (sizeof (bfd_vma) < 8) | |
381 | { | |
382 | non_fatal (_("This executable has been built without support for a\n\ | |
383 | 64 bit data type and so it cannot process 64 bit ELF files.\n")); | |
384 | return 0; | |
385 | } | |
386 | ||
387 | if (fread (ehdr64.e_type, sizeof (ehdr64) - EI_NIDENT, | |
388 | 1, file) != 1) | |
389 | return 0; | |
390 | ||
391 | elf_header.e_type = BYTE_GET (ehdr64.e_type); | |
392 | elf_header.e_machine = BYTE_GET (ehdr64.e_machine); | |
393 | elf_header.e_version = BYTE_GET (ehdr64.e_version); | |
394 | elf_header.e_entry = BYTE_GET (ehdr64.e_entry); | |
395 | elf_header.e_phoff = BYTE_GET (ehdr64.e_phoff); | |
396 | elf_header.e_shoff = BYTE_GET (ehdr64.e_shoff); | |
397 | elf_header.e_flags = BYTE_GET (ehdr64.e_flags); | |
398 | elf_header.e_ehsize = BYTE_GET (ehdr64.e_ehsize); | |
399 | elf_header.e_phentsize = BYTE_GET (ehdr64.e_phentsize); | |
400 | elf_header.e_phnum = BYTE_GET (ehdr64.e_phnum); | |
401 | elf_header.e_shentsize = BYTE_GET (ehdr64.e_shentsize); | |
402 | elf_header.e_shnum = BYTE_GET (ehdr64.e_shnum); | |
403 | elf_header.e_shstrndx = BYTE_GET (ehdr64.e_shstrndx); | |
404 | ||
405 | memcpy (&ehdr64, &elf_header, EI_NIDENT); | |
406 | break; | |
407 | } | |
408 | return 1; | |
409 | } | |
410 | ||
411 | /* Process one ELF object file according to the command line options. | |
412 | This file may actually be stored in an archive. The file is | |
413 | positioned at the start of the ELF object. */ | |
414 | ||
415 | static int | |
416 | process_object (const char *file_name, FILE *file) | |
417 | { | |
418 | /* Rememeber where we are. */ | |
419 | long offset = ftell (file); | |
420 | ||
421 | if (! get_file_header (file)) | |
422 | { | |
423 | non_fatal (_("%s: Failed to read ELF header\n"), file_name); | |
424 | return 1; | |
425 | } | |
426 | ||
427 | /* Go to the position of the ELF header. */ | |
428 | if (fseek (file, offset, SEEK_SET) != 0) | |
429 | { | |
430 | non_fatal (_("%s: Failed to seek to ELF header\n"), file_name); | |
431 | } | |
432 | ||
433 | if (! update_elf_header (file_name, file)) | |
434 | return 1; | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | /* Return the path name for a proxy entry in a thin archive, adjusted relative | |
440 | to the path name of the thin archive itself if necessary. Always returns | |
441 | a pointer to malloc'ed memory. */ | |
442 | ||
443 | static char * | |
444 | adjust_relative_path (const char *file_name, char * name, int name_len) | |
445 | { | |
446 | char * member_file_name; | |
447 | const char * base_name = lbasename (file_name); | |
448 | ||
449 | /* This is a proxy entry for a thin archive member. | |
450 | If the extended name table contains an absolute path | |
451 | name, or if the archive is in the current directory, | |
452 | use the path name as given. Otherwise, we need to | |
453 | find the member relative to the directory where the | |
454 | archive is located. */ | |
455 | if (IS_ABSOLUTE_PATH (name) || base_name == file_name) | |
456 | { | |
457 | member_file_name = malloc (name_len + 1); | |
458 | if (member_file_name == NULL) | |
459 | { | |
460 | non_fatal (_("Out of memory\n")); | |
461 | return NULL; | |
462 | } | |
463 | memcpy (member_file_name, name, name_len); | |
464 | member_file_name[name_len] = '\0'; | |
465 | } | |
466 | else | |
467 | { | |
468 | /* Concatenate the path components of the archive file name | |
469 | to the relative path name from the extended name table. */ | |
470 | size_t prefix_len = base_name - file_name; | |
471 | member_file_name = malloc (prefix_len + name_len + 1); | |
472 | if (member_file_name == NULL) | |
473 | { | |
474 | non_fatal (_("Out of memory\n")); | |
475 | return NULL; | |
476 | } | |
477 | memcpy (member_file_name, file_name, prefix_len); | |
478 | memcpy (member_file_name + prefix_len, name, name_len); | |
479 | member_file_name[prefix_len + name_len] = '\0'; | |
480 | } | |
481 | return member_file_name; | |
482 | } | |
483 | ||
484 | /* Structure to hold information about an archive file. */ | |
485 | ||
486 | struct archive_info | |
487 | { | |
488 | char * file_name; /* Archive file name. */ | |
489 | FILE * file; /* Open file descriptor. */ | |
490 | unsigned long index_num; /* Number of symbols in table. */ | |
491 | unsigned long * index_array; /* The array of member offsets. */ | |
492 | char * sym_table; /* The symbol table. */ | |
493 | unsigned long sym_size; /* Size of the symbol table. */ | |
494 | char * longnames; /* The long file names table. */ | |
495 | unsigned long longnames_size; /* Size of the long file names table. */ | |
496 | unsigned long nested_member_origin; /* Origin in the nested archive of the current member. */ | |
497 | unsigned long next_arhdr_offset; /* Offset of the next archive header. */ | |
498 | bfd_boolean is_thin_archive; /* TRUE if this is a thin archive. */ | |
499 | struct ar_hdr arhdr; /* Current archive header. */ | |
500 | }; | |
501 | ||
502 | /* Read the symbol table and long-name table from an archive. */ | |
503 | ||
504 | static int | |
505 | setup_archive (struct archive_info * arch, const char * file_name, | |
506 | FILE * file, bfd_boolean is_thin_archive) | |
507 | { | |
508 | size_t got; | |
509 | unsigned long size; | |
510 | ||
511 | arch->file_name = strdup (file_name); | |
512 | arch->file = file; | |
513 | arch->index_num = 0; | |
514 | arch->index_array = NULL; | |
515 | arch->sym_table = NULL; | |
516 | arch->sym_size = 0; | |
517 | arch->longnames = NULL; | |
518 | arch->longnames_size = 0; | |
519 | arch->nested_member_origin = 0; | |
520 | arch->is_thin_archive = is_thin_archive; | |
521 | arch->next_arhdr_offset = SARMAG; | |
522 | ||
523 | /* Read the first archive member header. */ | |
524 | if (fseek (file, SARMAG, SEEK_SET) != 0) | |
525 | { | |
526 | non_fatal (_("%s: failed to seek to first archive header\n"), | |
527 | file_name); | |
528 | return 1; | |
529 | } | |
530 | got = fread (&arch->arhdr, 1, sizeof arch->arhdr, file); | |
531 | if (got != sizeof arch->arhdr) | |
532 | { | |
533 | if (got == 0) | |
534 | return 0; | |
535 | ||
536 | non_fatal (_("%s: failed to read archive header\n"), file_name); | |
537 | return 1; | |
538 | } | |
539 | ||
540 | /* See if this is the archive symbol table. */ | |
541 | if (const_strneq (arch->arhdr.ar_name, "/ ") | |
542 | || const_strneq (arch->arhdr.ar_name, "/SYM64/ ")) | |
543 | { | |
544 | size = strtoul (arch->arhdr.ar_size, NULL, 10); | |
545 | size = size + (size & 1); | |
546 | ||
547 | arch->next_arhdr_offset += sizeof arch->arhdr + size; | |
548 | ||
549 | if (fseek (file, size, SEEK_CUR) != 0) | |
550 | { | |
551 | non_fatal (_("%s: failed to skip archive symbol table\n"), | |
552 | file_name); | |
553 | return 1; | |
554 | } | |
555 | ||
556 | /* Read the next archive header. */ | |
557 | got = fread (&arch->arhdr, 1, sizeof arch->arhdr, file); | |
558 | if (got != sizeof arch->arhdr) | |
559 | { | |
560 | if (got == 0) | |
561 | return 0; | |
562 | non_fatal (_("%s: failed to read archive header following archive index\n"), | |
563 | file_name); | |
564 | return 1; | |
565 | } | |
566 | } | |
567 | ||
568 | if (const_strneq (arch->arhdr.ar_name, "// ")) | |
569 | { | |
570 | /* This is the archive string table holding long member names. */ | |
571 | arch->longnames_size = strtoul (arch->arhdr.ar_size, NULL, 10); | |
572 | arch->next_arhdr_offset += sizeof arch->arhdr + arch->longnames_size; | |
573 | ||
574 | arch->longnames = malloc (arch->longnames_size); | |
575 | if (arch->longnames == NULL) | |
576 | { | |
577 | non_fatal (_("Out of memory reading long symbol names in archive\n")); | |
578 | return 1; | |
579 | } | |
580 | ||
581 | if (fread (arch->longnames, arch->longnames_size, 1, file) != 1) | |
582 | { | |
583 | free (arch->longnames); | |
584 | arch->longnames = NULL; | |
585 | non_fatal (_("%s: failed to read long symbol name string table\n") | |
586 | , file_name); | |
587 | return 1; | |
588 | } | |
589 | ||
590 | if ((arch->longnames_size & 1) != 0) | |
591 | getc (file); | |
592 | } | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | /* Release the memory used for the archive information. */ | |
598 | ||
599 | static void | |
600 | release_archive (struct archive_info * arch) | |
601 | { | |
602 | if (arch->file_name != NULL) | |
603 | free (arch->file_name); | |
604 | if (arch->index_array != NULL) | |
605 | free (arch->index_array); | |
606 | if (arch->sym_table != NULL) | |
607 | free (arch->sym_table); | |
608 | if (arch->longnames != NULL) | |
609 | free (arch->longnames); | |
610 | } | |
611 | ||
612 | /* Open and setup a nested archive, if not already open. */ | |
613 | ||
614 | static int | |
615 | setup_nested_archive (struct archive_info * nested_arch, char * member_file_name) | |
616 | { | |
617 | FILE * member_file; | |
618 | ||
619 | /* Have we already setup this archive? */ | |
620 | if (nested_arch->file_name != NULL | |
621 | && streq (nested_arch->file_name, member_file_name)) | |
622 | return 0; | |
623 | ||
624 | /* Close previous file and discard cached information. */ | |
625 | if (nested_arch->file != NULL) | |
626 | fclose (nested_arch->file); | |
627 | release_archive (nested_arch); | |
628 | ||
629 | member_file = fopen (member_file_name, "r+b"); | |
630 | if (member_file == NULL) | |
631 | return 1; | |
632 | return setup_archive (nested_arch, member_file_name, member_file, | |
633 | FALSE); | |
634 | } | |
635 | ||
636 | static char * | |
637 | get_archive_member_name_at (struct archive_info * arch, | |
638 | unsigned long offset, | |
639 | struct archive_info * nested_arch); | |
640 | ||
641 | /* Get the name of an archive member from the current archive header. | |
642 | For simple names, this will modify the ar_name field of the current | |
643 | archive header. For long names, it will return a pointer to the | |
644 | longnames table. For nested archives, it will open the nested archive | |
645 | and get the name recursively. NESTED_ARCH is a single-entry cache so | |
646 | we don't keep rereading the same information from a nested archive. */ | |
647 | ||
648 | static char * | |
649 | get_archive_member_name (struct archive_info * arch, | |
650 | struct archive_info * nested_arch) | |
651 | { | |
652 | unsigned long j, k; | |
653 | ||
654 | if (arch->arhdr.ar_name[0] == '/') | |
655 | { | |
656 | /* We have a long name. */ | |
657 | char * endp; | |
658 | char * member_file_name; | |
659 | char * member_name; | |
660 | ||
661 | arch->nested_member_origin = 0; | |
662 | k = j = strtoul (arch->arhdr.ar_name + 1, &endp, 10); | |
663 | if (arch->is_thin_archive && endp != NULL && * endp == ':') | |
664 | arch->nested_member_origin = strtoul (endp + 1, NULL, 10); | |
665 | ||
666 | while ((j < arch->longnames_size) | |
667 | && (arch->longnames[j] != '\n') | |
668 | && (arch->longnames[j] != '\0')) | |
669 | j++; | |
670 | if (arch->longnames[j-1] == '/') | |
671 | j--; | |
672 | arch->longnames[j] = '\0'; | |
673 | ||
674 | if (!arch->is_thin_archive || arch->nested_member_origin == 0) | |
675 | return arch->longnames + k; | |
676 | ||
677 | /* This is a proxy for a member of a nested archive. | |
678 | Find the name of the member in that archive. */ | |
679 | member_file_name = adjust_relative_path (arch->file_name, | |
680 | arch->longnames + k, | |
681 | j - k); | |
682 | if (member_file_name != NULL | |
683 | && setup_nested_archive (nested_arch, member_file_name) == 0 | |
684 | && (member_name = get_archive_member_name_at (nested_arch, | |
685 | arch->nested_member_origin, | |
686 | NULL)) != NULL) | |
687 | { | |
688 | free (member_file_name); | |
689 | return member_name; | |
690 | } | |
691 | free (member_file_name); | |
692 | ||
693 | /* Last resort: just return the name of the nested archive. */ | |
694 | return arch->longnames + k; | |
695 | } | |
696 | ||
697 | /* We have a normal (short) name. */ | |
698 | j = 0; | |
699 | while ((arch->arhdr.ar_name[j] != '/') && (j < 16)) | |
700 | j++; | |
701 | arch->arhdr.ar_name[j] = '\0'; | |
702 | return arch->arhdr.ar_name; | |
703 | } | |
704 | ||
705 | /* Get the name of an archive member at a given OFFSET within an | |
706 | archive ARCH. */ | |
707 | ||
708 | static char * | |
709 | get_archive_member_name_at (struct archive_info * arch, | |
710 | unsigned long offset, | |
711 | struct archive_info * nested_arch) | |
712 | { | |
713 | size_t got; | |
714 | ||
715 | if (fseek (arch->file, offset, SEEK_SET) != 0) | |
716 | { | |
717 | non_fatal (_("%s: failed to seek to next file name\n"), | |
718 | arch->file_name); | |
719 | return NULL; | |
720 | } | |
721 | got = fread (&arch->arhdr, 1, sizeof arch->arhdr, arch->file); | |
722 | if (got != sizeof arch->arhdr) | |
723 | { | |
724 | non_fatal (_("%s: failed to read archive header\n"), | |
725 | arch->file_name); | |
726 | return NULL; | |
727 | } | |
728 | if (memcmp (arch->arhdr.ar_fmag, ARFMAG, 2) != 0) | |
729 | { | |
730 | non_fatal (_("%s: did not find a valid archive header\n"), | |
731 | arch->file_name); | |
732 | return NULL; | |
733 | } | |
734 | ||
735 | return get_archive_member_name (arch, nested_arch); | |
736 | } | |
737 | ||
738 | /* Construct a string showing the name of the archive member, qualified | |
739 | with the name of the containing archive file. For thin archives, we | |
740 | use square brackets to denote the indirection. For nested archives, | |
741 | we show the qualified name of the external member inside the square | |
742 | brackets (e.g., "thin.a[normal.a(foo.o)]"). */ | |
743 | ||
744 | static char * | |
745 | make_qualified_name (struct archive_info * arch, | |
746 | struct archive_info * nested_arch, | |
747 | char * member_name) | |
748 | { | |
749 | size_t len; | |
750 | char * name; | |
751 | ||
752 | len = strlen (arch->file_name) + strlen (member_name) + 3; | |
753 | if (arch->is_thin_archive && arch->nested_member_origin != 0) | |
754 | len += strlen (nested_arch->file_name) + 2; | |
755 | ||
756 | name = malloc (len); | |
757 | if (name == NULL) | |
758 | { | |
759 | non_fatal (_("Out of memory\n")); | |
760 | return NULL; | |
761 | } | |
762 | ||
763 | if (arch->is_thin_archive && arch->nested_member_origin != 0) | |
764 | snprintf (name, len, "%s[%s(%s)]", arch->file_name, nested_arch->file_name, member_name); | |
765 | else if (arch->is_thin_archive) | |
766 | snprintf (name, len, "%s[%s]", arch->file_name, member_name); | |
767 | else | |
768 | snprintf (name, len, "%s(%s)", arch->file_name, member_name); | |
769 | ||
770 | return name; | |
771 | } | |
772 | ||
773 | /* Process an ELF archive. | |
774 | On entry the file is positioned just after the ARMAG string. */ | |
775 | ||
776 | static int | |
777 | process_archive (const char * file_name, FILE * file, | |
778 | bfd_boolean is_thin_archive) | |
779 | { | |
780 | struct archive_info arch; | |
781 | struct archive_info nested_arch; | |
782 | size_t got; | |
30fd33bb L |
783 | int ret; |
784 | ||
785 | /* The ARCH structure is used to hold information about this archive. */ | |
786 | arch.file_name = NULL; | |
787 | arch.file = NULL; | |
788 | arch.index_array = NULL; | |
789 | arch.sym_table = NULL; | |
790 | arch.longnames = NULL; | |
791 | ||
792 | /* The NESTED_ARCH structure is used as a single-item cache of information | |
793 | about a nested archive (when members of a thin archive reside within | |
794 | another regular archive file). */ | |
795 | nested_arch.file_name = NULL; | |
796 | nested_arch.file = NULL; | |
797 | nested_arch.index_array = NULL; | |
798 | nested_arch.sym_table = NULL; | |
799 | nested_arch.longnames = NULL; | |
800 | ||
801 | if (setup_archive (&arch, file_name, file, is_thin_archive) != 0) | |
802 | { | |
803 | ret = 1; | |
804 | goto out; | |
805 | } | |
806 | ||
30fd33bb L |
807 | ret = 0; |
808 | ||
809 | while (1) | |
810 | { | |
811 | char * name; | |
812 | size_t namelen; | |
813 | char * qualified_name; | |
814 | ||
815 | /* Read the next archive header. */ | |
816 | if (fseek (file, arch.next_arhdr_offset, SEEK_SET) != 0) | |
817 | { | |
818 | non_fatal (_("%s: failed to seek to next archive header\n"), | |
819 | file_name); | |
820 | return 1; | |
821 | } | |
822 | got = fread (&arch.arhdr, 1, sizeof arch.arhdr, file); | |
823 | if (got != sizeof arch.arhdr) | |
824 | { | |
825 | if (got == 0) | |
826 | break; | |
827 | non_fatal (_("%s: failed to read archive header\n"), | |
828 | file_name); | |
829 | ret = 1; | |
830 | break; | |
831 | } | |
832 | if (memcmp (arch.arhdr.ar_fmag, ARFMAG, 2) != 0) | |
833 | { | |
834 | non_fatal (_("%s: did not find a valid archive header\n"), | |
835 | arch.file_name); | |
836 | ret = 1; | |
837 | break; | |
838 | } | |
839 | ||
840 | arch.next_arhdr_offset += sizeof arch.arhdr; | |
841 | ||
842 | archive_file_size = strtoul (arch.arhdr.ar_size, NULL, 10); | |
843 | if (archive_file_size & 01) | |
844 | ++archive_file_size; | |
845 | ||
846 | name = get_archive_member_name (&arch, &nested_arch); | |
847 | if (name == NULL) | |
848 | { | |
849 | non_fatal (_("%s: bad archive file name\n"), file_name); | |
850 | ret = 1; | |
851 | break; | |
852 | } | |
853 | namelen = strlen (name); | |
854 | ||
855 | qualified_name = make_qualified_name (&arch, &nested_arch, name); | |
856 | if (qualified_name == NULL) | |
857 | { | |
858 | non_fatal (_("%s: bad archive file name\n"), file_name); | |
859 | ret = 1; | |
860 | break; | |
861 | } | |
862 | ||
863 | if (is_thin_archive && arch.nested_member_origin == 0) | |
864 | { | |
865 | /* This is a proxy for an external member of a thin archive. */ | |
866 | FILE *member_file; | |
867 | char *member_file_name = adjust_relative_path (file_name, | |
868 | name, namelen); | |
869 | if (member_file_name == NULL) | |
870 | { | |
871 | ret = 1; | |
872 | break; | |
873 | } | |
874 | ||
875 | member_file = fopen (member_file_name, "r+b"); | |
876 | if (member_file == NULL) | |
877 | { | |
878 | non_fatal (_("Input file '%s' is not readable\n"), | |
879 | member_file_name); | |
880 | free (member_file_name); | |
881 | ret = 1; | |
882 | break; | |
883 | } | |
884 | ||
885 | archive_file_offset = arch.nested_member_origin; | |
886 | ||
887 | ret |= process_object (qualified_name, member_file); | |
888 | ||
889 | fclose (member_file); | |
890 | free (member_file_name); | |
891 | } | |
892 | else if (is_thin_archive) | |
893 | { | |
894 | /* This is a proxy for a member of a nested archive. */ | |
895 | archive_file_offset = arch.nested_member_origin + sizeof arch.arhdr; | |
896 | ||
897 | /* The nested archive file will have been opened and setup by | |
898 | get_archive_member_name. */ | |
899 | if (fseek (nested_arch.file, archive_file_offset, | |
900 | SEEK_SET) != 0) | |
901 | { | |
902 | non_fatal (_("%s: failed to seek to archive member\n"), | |
903 | nested_arch.file_name); | |
904 | ret = 1; | |
905 | break; | |
906 | } | |
907 | ||
908 | ret |= process_object (qualified_name, nested_arch.file); | |
909 | } | |
910 | else | |
911 | { | |
912 | archive_file_offset = arch.next_arhdr_offset; | |
913 | arch.next_arhdr_offset += archive_file_size; | |
914 | ||
915 | ret |= process_object (qualified_name, file); | |
916 | } | |
917 | ||
918 | free (qualified_name); | |
919 | } | |
920 | ||
921 | out: | |
922 | if (nested_arch.file != NULL) | |
923 | fclose (nested_arch.file); | |
924 | release_archive (&nested_arch); | |
925 | release_archive (&arch); | |
926 | ||
927 | return ret; | |
928 | } | |
929 | ||
930 | static int | |
931 | check_file (const char *file_name, struct stat *statbuf_p) | |
932 | { | |
933 | struct stat statbuf; | |
934 | ||
935 | if (statbuf_p == NULL) | |
936 | statbuf_p = &statbuf; | |
937 | ||
938 | if (stat (file_name, statbuf_p) < 0) | |
939 | { | |
940 | if (errno == ENOENT) | |
941 | non_fatal (_("'%s': No such file\n"), file_name); | |
942 | else | |
943 | non_fatal (_("Could not locate '%s'. System error message: %s\n"), | |
944 | file_name, strerror (errno)); | |
945 | return 1; | |
946 | } | |
947 | ||
948 | if (! S_ISREG (statbuf_p->st_mode)) | |
949 | { | |
950 | non_fatal (_("'%s' is not an ordinary file\n"), file_name); | |
951 | return 1; | |
952 | } | |
953 | ||
954 | return 0; | |
955 | } | |
956 | ||
957 | static int | |
958 | process_file (const char *file_name) | |
959 | { | |
960 | FILE * file; | |
961 | char armag[SARMAG]; | |
962 | int ret; | |
963 | ||
964 | if (check_file (file_name, NULL)) | |
965 | return 1; | |
966 | ||
967 | file = fopen (file_name, "r+b"); | |
968 | if (file == NULL) | |
969 | { | |
970 | non_fatal (_("Input file '%s' is not readable\n"), file_name); | |
971 | return 1; | |
972 | } | |
973 | ||
974 | if (fread (armag, SARMAG, 1, file) != 1) | |
975 | { | |
976 | non_fatal (_("%s: Failed to read file's magic number\n"), | |
977 | file_name); | |
978 | fclose (file); | |
979 | return 1; | |
980 | } | |
981 | ||
982 | if (memcmp (armag, ARMAG, SARMAG) == 0) | |
983 | ret = process_archive (file_name, file, FALSE); | |
984 | else if (memcmp (armag, ARMAGT, SARMAG) == 0) | |
985 | ret = process_archive (file_name, file, TRUE); | |
986 | else | |
987 | { | |
988 | rewind (file); | |
989 | archive_file_size = archive_file_offset = 0; | |
990 | ret = process_object (file_name, file); | |
991 | } | |
992 | ||
993 | fclose (file); | |
994 | ||
995 | return ret; | |
996 | } | |
997 | ||
998 | /* Return EM_XXX for a machine string, MACH. */ | |
999 | ||
1000 | static int | |
1001 | elf_machine (const char *mach) | |
1002 | { | |
1003 | if (strcasecmp (mach, "l1om") == 0) | |
1004 | return EM_L1OM; | |
1005 | if (strcasecmp (mach, "x86_64") == 0) | |
1006 | return EM_X86_64; | |
1007 | if (strcasecmp (mach, "x86-64") == 0) | |
1008 | return EM_X86_64; | |
1009 | if (strcasecmp (mach, "none") == 0) | |
1010 | return EM_NONE; | |
1011 | ||
1012 | non_fatal (_("Unknown machine type: %s\n"), mach); | |
1013 | ||
1014 | return -1; | |
1015 | } | |
1016 | ||
1017 | /* Return ELF class for a machine type, MACH. */ | |
1018 | ||
1019 | static int | |
1020 | elf_class (int mach) | |
1021 | { | |
1022 | switch (mach) | |
1023 | { | |
1024 | case EM_L1OM: | |
1025 | case EM_X86_64: | |
1026 | return ELFCLASS64; | |
1027 | case EM_NONE: | |
1028 | return ELFCLASSNONE; | |
1029 | default: | |
1030 | non_fatal (_("Unknown machine type: %d\n"), mach); | |
1031 | return -1; | |
1032 | } | |
1033 | } | |
1034 | ||
dd35de74 L |
1035 | /* Return ET_XXX for a type string, TYPE. */ |
1036 | ||
1037 | static int | |
1038 | elf_type (const char *type) | |
1039 | { | |
1040 | if (strcasecmp (type, "rel") == 0) | |
1041 | return ET_REL; | |
1042 | if (strcasecmp (type, "exec") == 0) | |
1043 | return ET_EXEC; | |
1044 | if (strcasecmp (type, "dyn") == 0) | |
1045 | return ET_DYN; | |
1046 | if (strcasecmp (type, "none") == 0) | |
1047 | return ET_NONE; | |
1048 | ||
1049 | non_fatal (_("Unknown type: %s\n"), type); | |
1050 | ||
1051 | return -1; | |
1052 | } | |
1053 | ||
30fd33bb L |
1054 | enum command_line_switch |
1055 | { | |
1056 | OPTION_INPUT_MACH = 150, | |
dd35de74 L |
1057 | OPTION_OUTPUT_MACH, |
1058 | OPTION_INPUT_TYPE, | |
1059 | OPTION_OUTPUT_TYPE | |
30fd33bb L |
1060 | }; |
1061 | ||
1062 | static struct option options[] = | |
1063 | { | |
1064 | {"input-mach", required_argument, 0, OPTION_INPUT_MACH}, | |
1065 | {"output-mach", required_argument, 0, OPTION_OUTPUT_MACH}, | |
dd35de74 L |
1066 | {"input-type", required_argument, 0, OPTION_INPUT_TYPE}, |
1067 | {"output-type", required_argument, 0, OPTION_OUTPUT_TYPE}, | |
30fd33bb L |
1068 | {"version", no_argument, 0, 'v'}, |
1069 | {"help", no_argument, 0, 'h'}, | |
1070 | {0, no_argument, 0, 0} | |
1071 | }; | |
1072 | ||
1073 | static void | |
1074 | usage (FILE *stream, int exit_status) | |
1075 | { | |
dd35de74 | 1076 | fprintf (stream, _("Usage: %s [option(s)] {--output-mach <machine>|--output-type <type>} elffile(s)\n"), |
30fd33bb L |
1077 | program_name); |
1078 | fprintf (stream, _(" Update the ELF header of ELF files\n")); | |
1079 | fprintf (stream, _(" The options are:\n")); | |
1080 | fprintf (stream, _("\ | |
1081 | --input-mach <machine> Set input machine type to <machine>\n\ | |
1082 | --output-mach <machine> Set output machine type to <machine>\n\ | |
dd35de74 L |
1083 | --input-type <type> Set input file type to <type>\n\ |
1084 | --output-type <type> Set output file type to <type>\n\ | |
30fd33bb L |
1085 | -h --help Display this information\n\ |
1086 | -v --version Display the version number of %s\n\ | |
1087 | "), | |
1088 | program_name); | |
1089 | if (REPORT_BUGS_TO[0] && exit_status == 0) | |
1090 | fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); | |
1091 | exit (exit_status); | |
1092 | } | |
1093 | ||
1094 | int | |
1095 | main (int argc, char ** argv) | |
1096 | { | |
1097 | int c, status; | |
1098 | ||
1099 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
1100 | setlocale (LC_MESSAGES, ""); | |
1101 | #endif | |
1102 | #if defined (HAVE_SETLOCALE) | |
1103 | setlocale (LC_CTYPE, ""); | |
1104 | #endif | |
1105 | bindtextdomain (PACKAGE, LOCALEDIR); | |
1106 | textdomain (PACKAGE); | |
1107 | ||
1108 | expandargv (&argc, &argv); | |
1109 | ||
1110 | while ((c = getopt_long (argc, argv, "hv", | |
1111 | options, (int *) 0)) != EOF) | |
1112 | { | |
1113 | switch (c) | |
1114 | { | |
1115 | case OPTION_INPUT_MACH: | |
1116 | input_elf_machine = elf_machine (optarg); | |
1117 | if (input_elf_machine < 0) | |
1118 | return 1; | |
1119 | input_elf_class = elf_class (input_elf_machine); | |
1120 | if (input_elf_class < 0) | |
1121 | return 1; | |
1122 | break; | |
1123 | ||
1124 | case OPTION_OUTPUT_MACH: | |
1125 | output_elf_machine = elf_machine (optarg); | |
1126 | if (output_elf_machine < 0) | |
1127 | return 1; | |
1128 | break; | |
1129 | ||
dd35de74 L |
1130 | case OPTION_INPUT_TYPE: |
1131 | input_elf_type = elf_type (optarg); | |
1132 | if (input_elf_type < 0) | |
1133 | return 1; | |
1134 | break; | |
1135 | ||
1136 | case OPTION_OUTPUT_TYPE: | |
1137 | output_elf_type = elf_type (optarg); | |
1138 | if (output_elf_type < 0) | |
1139 | return 1; | |
1140 | break; | |
1141 | ||
30fd33bb L |
1142 | case 'h': |
1143 | usage (stdout, 0); | |
1144 | ||
1145 | case 'v': | |
1146 | print_version (program_name); | |
1147 | break; | |
1148 | ||
1149 | default: | |
1150 | usage (stderr, 1); | |
1151 | } | |
1152 | } | |
1153 | ||
dd35de74 L |
1154 | if (optind == argc |
1155 | || (output_elf_machine == -1 | |
1156 | && output_elf_type == -1)) | |
30fd33bb L |
1157 | usage (stderr, 1); |
1158 | ||
1159 | status = 0; | |
1160 | while (optind < argc) | |
1161 | status |= process_file (argv[optind++]); | |
1162 | ||
1163 | return status; | |
1164 | } |