Commit | Line | Data |
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30fd33bb | 1 | /* elfedit.c -- Update the ELF header of an ELF format file |
82704155 | 2 | Copyright (C) 2010-2019 Free Software Foundation, Inc. |
30fd33bb L |
3 | |
4 | This file is part of GNU Binutils. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA | |
19 | 02110-1301, USA. */ | |
20 | \f | |
8a6b075b | 21 | #include "config.h" |
30fd33bb L |
22 | #include "sysdep.h" |
23 | #include <assert.h> | |
30fd33bb L |
24 | |
25 | #if __GNUC__ >= 2 | |
26 | /* Define BFD64 here, even if our default architecture is 32 bit ELF | |
27 | as this will allow us to read in and parse 64bit and 32bit ELF files. | |
28 | Only do this if we believe that the compiler can support a 64 bit | |
29 | data type. For now we only rely on GCC being able to do this. */ | |
30 | #define BFD64 | |
31 | #endif | |
32 | ||
33 | #include "bfd.h" | |
3284fe0c | 34 | #include "elfcomm.h" |
30fd33bb L |
35 | #include "bucomm.h" |
36 | ||
37 | #include "elf/common.h" | |
38 | #include "elf/external.h" | |
39 | #include "elf/internal.h" | |
40 | ||
30fd33bb L |
41 | #include "getopt.h" |
42 | #include "libiberty.h" | |
43 | #include "safe-ctype.h" | |
44 | #include "filenames.h" | |
45 | ||
46 | char * program_name = "elfedit"; | |
47 | static long archive_file_offset; | |
48 | static unsigned long archive_file_size; | |
49 | static Elf_Internal_Ehdr elf_header; | |
50 | static Elf32_External_Ehdr ehdr32; | |
51 | static Elf64_External_Ehdr ehdr64; | |
52 | static int input_elf_machine = -1; | |
53 | static int output_elf_machine = -1; | |
dd35de74 L |
54 | static int input_elf_type = -1; |
55 | static int output_elf_type = -1; | |
d0514c49 L |
56 | static int input_elf_osabi = -1; |
57 | static int output_elf_osabi = -1; | |
6c14750f L |
58 | enum elfclass |
59 | { | |
60 | ELF_CLASS_UNKNOWN = -1, | |
61 | ELF_CLASS_NONE = ELFCLASSNONE, | |
62 | ELF_CLASS_32 = ELFCLASS32, | |
63 | ELF_CLASS_64 = ELFCLASS64, | |
64 | ELF_CLASS_BOTH | |
65 | }; | |
66 | static enum elfclass input_elf_class = ELF_CLASS_UNKNOWN; | |
67 | static enum elfclass output_elf_class = ELF_CLASS_BOTH; | |
68 | ||
8a6b075b L |
69 | #ifdef HAVE_MMAP |
70 | #include <sys/mman.h> | |
71 | ||
72 | static unsigned int enable_x86_features; | |
73 | static unsigned int disable_x86_features; | |
74 | ||
75 | static int | |
76 | update_gnu_property (const char *file_name, FILE *file) | |
77 | { | |
78 | char *map; | |
79 | Elf_Internal_Phdr *phdrs; | |
80 | struct stat st_buf; | |
81 | unsigned int i; | |
82 | int ret; | |
83 | ||
84 | if (!enable_x86_features && !disable_x86_features) | |
85 | return 0; | |
86 | ||
87 | if (elf_header.e_machine != EM_386 | |
88 | && elf_header.e_machine != EM_X86_64) | |
89 | { | |
90 | error (_("%s: Not an i386 nor x86-64 ELF file\n"), file_name); | |
91 | return 0; | |
92 | } | |
93 | ||
94 | if (fstat (fileno (file), &st_buf) < 0) | |
95 | { | |
96 | error (_("%s: stat () failed\n"), file_name); | |
97 | return 1; | |
98 | } | |
99 | ||
100 | map = mmap (NULL, st_buf.st_size, PROT_READ | PROT_WRITE, | |
101 | MAP_SHARED, fileno (file), 0); | |
102 | if (map == MAP_FAILED) | |
103 | { | |
104 | error (_("%s: mmap () failed\n"), file_name); | |
105 | return 0; | |
106 | } | |
107 | ||
108 | phdrs = xmalloc (elf_header.e_phnum * sizeof (*phdrs)); | |
109 | ||
110 | if (elf_header.e_ident[EI_CLASS] == ELFCLASS32) | |
111 | { | |
112 | Elf32_External_Phdr *phdrs32 | |
113 | = (Elf32_External_Phdr *) (map + elf_header.e_phoff); | |
114 | for (i = 0; i < elf_header.e_phnum; i++) | |
115 | { | |
116 | phdrs[i].p_type = BYTE_GET (phdrs32[i].p_type); | |
117 | phdrs[i].p_offset = BYTE_GET (phdrs32[i].p_offset); | |
118 | phdrs[i].p_vaddr = BYTE_GET (phdrs32[i].p_vaddr); | |
119 | phdrs[i].p_paddr = BYTE_GET (phdrs32[i].p_paddr); | |
120 | phdrs[i].p_filesz = BYTE_GET (phdrs32[i].p_filesz); | |
121 | phdrs[i].p_memsz = BYTE_GET (phdrs32[i].p_memsz); | |
122 | phdrs[i].p_flags = BYTE_GET (phdrs32[i].p_flags); | |
123 | phdrs[i].p_align = BYTE_GET (phdrs32[i].p_align); | |
124 | } | |
125 | } | |
126 | else | |
127 | { | |
128 | Elf64_External_Phdr *phdrs64 | |
129 | = (Elf64_External_Phdr *) (map + elf_header.e_phoff); | |
130 | for (i = 0; i < elf_header.e_phnum; i++) | |
131 | { | |
132 | phdrs[i].p_type = BYTE_GET (phdrs64[i].p_type); | |
133 | phdrs[i].p_offset = BYTE_GET (phdrs64[i].p_offset); | |
134 | phdrs[i].p_vaddr = BYTE_GET (phdrs64[i].p_vaddr); | |
135 | phdrs[i].p_paddr = BYTE_GET (phdrs64[i].p_paddr); | |
136 | phdrs[i].p_filesz = BYTE_GET (phdrs64[i].p_filesz); | |
137 | phdrs[i].p_memsz = BYTE_GET (phdrs64[i].p_memsz); | |
138 | phdrs[i].p_flags = BYTE_GET (phdrs64[i].p_flags); | |
139 | phdrs[i].p_align = BYTE_GET (phdrs64[i].p_align); | |
140 | } | |
141 | } | |
142 | ||
143 | ret = 0; | |
144 | for (i = 0; i < elf_header.e_phnum; i++) | |
145 | if (phdrs[i].p_type == PT_NOTE) | |
146 | { | |
147 | size_t offset = phdrs[i].p_offset; | |
148 | size_t size = phdrs[i].p_filesz; | |
149 | size_t align = phdrs[i].p_align; | |
150 | char *buf = map + offset; | |
151 | char *p = buf; | |
152 | ||
153 | while (p < buf + size) | |
154 | { | |
155 | Elf_External_Note *xnp = (Elf_External_Note *) p; | |
156 | Elf_Internal_Note in; | |
157 | ||
158 | if (offsetof (Elf_External_Note, name) > buf - p + size) | |
159 | { | |
160 | ret = 1; | |
161 | goto out; | |
162 | } | |
163 | ||
164 | in.type = BYTE_GET (xnp->type); | |
165 | in.namesz = BYTE_GET (xnp->namesz); | |
166 | in.namedata = xnp->name; | |
167 | if (in.namesz > buf - in.namedata + size) | |
168 | { | |
169 | ret = 1; | |
170 | goto out; | |
171 | } | |
172 | ||
173 | in.descsz = BYTE_GET (xnp->descsz); | |
174 | in.descdata = p + ELF_NOTE_DESC_OFFSET (in.namesz, align); | |
175 | in.descpos = offset + (in.descdata - buf); | |
176 | if (in.descsz != 0 | |
177 | && (in.descdata >= buf + size | |
178 | || in.descsz > buf - in.descdata + size)) | |
179 | { | |
180 | ret = 1; | |
181 | goto out; | |
182 | } | |
183 | ||
184 | if (in.namesz == sizeof "GNU" | |
185 | && strcmp (in.namedata, "GNU") == 0 | |
186 | && in.type == NT_GNU_PROPERTY_TYPE_0) | |
187 | { | |
188 | unsigned char *ptr; | |
189 | unsigned char *ptr_end; | |
190 | ||
191 | if (in.descsz < 8 || (in.descsz % align) != 0) | |
192 | { | |
193 | ret = 1; | |
194 | goto out; | |
195 | } | |
196 | ||
197 | ptr = (unsigned char *) in.descdata; | |
198 | ptr_end = ptr + in.descsz; | |
199 | ||
200 | do | |
201 | { | |
202 | unsigned int type = byte_get (ptr, 4); | |
203 | unsigned int datasz = byte_get (ptr + 4, 4); | |
204 | unsigned int bitmask, old_bitmask; | |
205 | ||
206 | ptr += 8; | |
207 | if ((ptr + datasz) > ptr_end) | |
208 | { | |
209 | ret = 1; | |
210 | goto out; | |
211 | } | |
212 | ||
213 | if (type == GNU_PROPERTY_X86_FEATURE_1_AND) | |
214 | { | |
215 | if (datasz != 4) | |
216 | { | |
217 | ret = 1; | |
218 | goto out; | |
219 | } | |
220 | ||
221 | old_bitmask = byte_get (ptr, 4); | |
222 | bitmask = old_bitmask; | |
223 | if (enable_x86_features) | |
224 | bitmask |= enable_x86_features; | |
225 | if (disable_x86_features) | |
226 | bitmask &= ~disable_x86_features; | |
227 | if (old_bitmask != bitmask) | |
256878f3 | 228 | byte_put (ptr, bitmask, 4); |
8a6b075b L |
229 | goto out; |
230 | } | |
231 | ||
232 | ptr += ELF_ALIGN_UP (datasz, align); | |
233 | } | |
234 | while ((ptr_end - ptr) >= 8); | |
235 | } | |
236 | ||
237 | p += ELF_NOTE_NEXT_OFFSET (in.namesz, in.descsz, align); | |
238 | } | |
239 | } | |
240 | ||
241 | out: | |
242 | if (ret != 0) | |
243 | error (_("%s: Invalid PT_NOTE segment\n"), file_name); | |
244 | ||
245 | free (phdrs); | |
246 | munmap (map, st_buf.st_size); | |
247 | ||
248 | return ret; | |
249 | } | |
250 | ||
251 | /* Set enable_x86_features and disable_x86_features for a feature | |
252 | string, FEATURE. */ | |
253 | ||
254 | static int | |
255 | elf_x86_feature (const char *feature, int enable) | |
256 | { | |
257 | unsigned int x86_feature; | |
258 | if (strcasecmp (feature, "ibt") == 0) | |
259 | x86_feature = GNU_PROPERTY_X86_FEATURE_1_IBT; | |
260 | else if (strcasecmp (feature, "shstk") == 0) | |
261 | x86_feature = GNU_PROPERTY_X86_FEATURE_1_SHSTK; | |
262 | else | |
760ddef4 L |
263 | { |
264 | error (_("Unknown x86 feature: %s\n"), feature); | |
265 | return -1; | |
266 | } | |
8a6b075b L |
267 | |
268 | if (enable) | |
269 | { | |
270 | enable_x86_features |= x86_feature; | |
271 | disable_x86_features &= ~x86_feature; | |
272 | } | |
273 | else | |
274 | { | |
275 | disable_x86_features |= x86_feature; | |
276 | enable_x86_features &= ~x86_feature; | |
277 | } | |
278 | ||
279 | return 0; | |
280 | } | |
281 | #endif | |
282 | ||
6c14750f L |
283 | /* Return ELF class for a machine type, MACH. */ |
284 | ||
285 | static enum elfclass | |
286 | elf_class (int mach) | |
287 | { | |
288 | switch (mach) | |
289 | { | |
290 | case EM_386: | |
291 | case EM_IAMCU: | |
292 | return ELF_CLASS_32; | |
293 | case EM_L1OM: | |
294 | case EM_K1OM: | |
295 | return ELF_CLASS_64; | |
296 | case EM_X86_64: | |
297 | case EM_NONE: | |
298 | return ELF_CLASS_BOTH; | |
299 | default: | |
aa9f7286 | 300 | return ELF_CLASS_BOTH; |
6c14750f L |
301 | } |
302 | } | |
30fd33bb | 303 | |
30fd33bb L |
304 | static int |
305 | update_elf_header (const char *file_name, FILE *file) | |
306 | { | |
d0514c49 | 307 | int class, machine, type, status, osabi; |
30fd33bb | 308 | |
30fd33bb L |
309 | if (elf_header.e_ident[EI_VERSION] != EV_CURRENT) |
310 | { | |
3284fe0c | 311 | error |
30fd33bb L |
312 | (_("%s: Unsupported EI_VERSION: %d is not %d\n"), |
313 | file_name, elf_header.e_ident[EI_VERSION], | |
314 | EV_CURRENT); | |
315 | return 0; | |
316 | } | |
317 | ||
2dc654c3 L |
318 | /* Return if e_machine is the same as output_elf_machine. */ |
319 | if (output_elf_machine == elf_header.e_machine) | |
320 | return 1; | |
321 | ||
322 | class = elf_header.e_ident[EI_CLASS]; | |
6c14750f | 323 | machine = elf_header.e_machine; |
2dc654c3 | 324 | |
30fd33bb | 325 | /* Skip if class doesn't match. */ |
6c14750f L |
326 | if (input_elf_class == ELF_CLASS_UNKNOWN) |
327 | input_elf_class = elf_class (machine); | |
328 | ||
329 | if (input_elf_class != ELF_CLASS_BOTH | |
330 | && (int) input_elf_class != class) | |
30fd33bb | 331 | { |
3284fe0c | 332 | error |
6c14750f | 333 | (_("%s: Unmatched input EI_CLASS: %d is not %d\n"), |
2dc654c3 | 334 | file_name, class, input_elf_class); |
30fd33bb L |
335 | return 0; |
336 | } | |
337 | ||
6c14750f L |
338 | if (output_elf_class != ELF_CLASS_BOTH |
339 | && (int) output_elf_class != class) | |
340 | { | |
341 | error | |
342 | (_("%s: Unmatched output EI_CLASS: %d is not %d\n"), | |
343 | file_name, class, output_elf_class); | |
344 | return 0; | |
345 | } | |
30fd33bb L |
346 | |
347 | /* Skip if e_machine doesn't match. */ | |
2dc654c3 | 348 | if (input_elf_machine != -1 && machine != input_elf_machine) |
30fd33bb | 349 | { |
3284fe0c | 350 | error |
30fd33bb | 351 | (_("%s: Unmatched e_machine: %d is not %d\n"), |
2dc654c3 | 352 | file_name, machine, input_elf_machine); |
30fd33bb L |
353 | return 0; |
354 | } | |
355 | ||
dd35de74 L |
356 | type = elf_header.e_type; |
357 | ||
358 | /* Skip if e_type doesn't match. */ | |
359 | if (input_elf_type != -1 && type != input_elf_type) | |
360 | { | |
3284fe0c | 361 | error |
dd35de74 L |
362 | (_("%s: Unmatched e_type: %d is not %d\n"), |
363 | file_name, type, input_elf_type); | |
364 | return 0; | |
365 | } | |
366 | ||
d0514c49 L |
367 | osabi = elf_header.e_ident[EI_OSABI]; |
368 | ||
369 | /* Skip if OSABI doesn't match. */ | |
370 | if (input_elf_osabi != -1 && osabi != input_elf_osabi) | |
371 | { | |
3284fe0c | 372 | error |
d0514c49 L |
373 | (_("%s: Unmatched EI_OSABI: %d is not %d\n"), |
374 | file_name, osabi, input_elf_osabi); | |
375 | return 0; | |
376 | } | |
377 | ||
378 | /* Update e_machine, e_type and EI_OSABI. */ | |
2dc654c3 | 379 | switch (class) |
30fd33bb L |
380 | { |
381 | default: | |
382 | /* We should never get here. */ | |
383 | abort (); | |
384 | break; | |
385 | case ELFCLASS32: | |
dd35de74 L |
386 | if (output_elf_machine != -1) |
387 | BYTE_PUT (ehdr32.e_machine, output_elf_machine); | |
388 | if (output_elf_type != -1) | |
389 | BYTE_PUT (ehdr32.e_type, output_elf_type); | |
d0514c49 L |
390 | if (output_elf_osabi != -1) |
391 | ehdr32.e_ident[EI_OSABI] = output_elf_osabi; | |
30fd33bb L |
392 | status = fwrite (&ehdr32, sizeof (ehdr32), 1, file) == 1; |
393 | break; | |
394 | case ELFCLASS64: | |
dd35de74 L |
395 | if (output_elf_machine != -1) |
396 | BYTE_PUT (ehdr64.e_machine, output_elf_machine); | |
397 | if (output_elf_type != -1) | |
398 | BYTE_PUT (ehdr64.e_type, output_elf_type); | |
d0514c49 L |
399 | if (output_elf_osabi != -1) |
400 | ehdr64.e_ident[EI_OSABI] = output_elf_osabi; | |
30fd33bb L |
401 | status = fwrite (&ehdr64, sizeof (ehdr64), 1, file) == 1; |
402 | break; | |
403 | } | |
404 | ||
405 | if (status != 1) | |
3284fe0c | 406 | error (_("%s: Failed to update ELF header: %s\n"), |
30fd33bb L |
407 | file_name, strerror (errno)); |
408 | ||
409 | return status; | |
410 | } | |
411 | ||
412 | static int | |
413 | get_file_header (FILE * file) | |
414 | { | |
415 | /* Read in the identity array. */ | |
416 | if (fread (elf_header.e_ident, EI_NIDENT, 1, file) != 1) | |
417 | return 0; | |
418 | ||
675accbd L |
419 | if (elf_header.e_ident[EI_MAG0] != ELFMAG0 |
420 | || elf_header.e_ident[EI_MAG1] != ELFMAG1 | |
421 | || elf_header.e_ident[EI_MAG2] != ELFMAG2 | |
422 | || elf_header.e_ident[EI_MAG3] != ELFMAG3) | |
423 | return 0; | |
424 | ||
30fd33bb L |
425 | /* Determine how to read the rest of the header. */ |
426 | switch (elf_header.e_ident[EI_DATA]) | |
427 | { | |
428 | default: /* fall through */ | |
429 | case ELFDATANONE: /* fall through */ | |
430 | case ELFDATA2LSB: | |
431 | byte_get = byte_get_little_endian; | |
432 | byte_put = byte_put_little_endian; | |
433 | break; | |
434 | case ELFDATA2MSB: | |
435 | byte_get = byte_get_big_endian; | |
436 | byte_put = byte_put_big_endian; | |
437 | break; | |
438 | } | |
439 | ||
440 | /* Read in the rest of the header. For now we only support 32 bit | |
441 | and 64 bit ELF files. */ | |
442 | switch (elf_header.e_ident[EI_CLASS]) | |
443 | { | |
444 | default: | |
30fd33bb L |
445 | return 0; |
446 | ||
447 | case ELFCLASS32: | |
448 | if (fread (ehdr32.e_type, sizeof (ehdr32) - EI_NIDENT, | |
449 | 1, file) != 1) | |
450 | return 0; | |
451 | ||
452 | elf_header.e_type = BYTE_GET (ehdr32.e_type); | |
453 | elf_header.e_machine = BYTE_GET (ehdr32.e_machine); | |
454 | elf_header.e_version = BYTE_GET (ehdr32.e_version); | |
455 | elf_header.e_entry = BYTE_GET (ehdr32.e_entry); | |
456 | elf_header.e_phoff = BYTE_GET (ehdr32.e_phoff); | |
457 | elf_header.e_shoff = BYTE_GET (ehdr32.e_shoff); | |
458 | elf_header.e_flags = BYTE_GET (ehdr32.e_flags); | |
459 | elf_header.e_ehsize = BYTE_GET (ehdr32.e_ehsize); | |
460 | elf_header.e_phentsize = BYTE_GET (ehdr32.e_phentsize); | |
461 | elf_header.e_phnum = BYTE_GET (ehdr32.e_phnum); | |
462 | elf_header.e_shentsize = BYTE_GET (ehdr32.e_shentsize); | |
463 | elf_header.e_shnum = BYTE_GET (ehdr32.e_shnum); | |
464 | elf_header.e_shstrndx = BYTE_GET (ehdr32.e_shstrndx); | |
465 | ||
466 | memcpy (&ehdr32, &elf_header, EI_NIDENT); | |
467 | break; | |
468 | ||
469 | case ELFCLASS64: | |
470 | /* If we have been compiled with sizeof (bfd_vma) == 4, then | |
471 | we will not be able to cope with the 64bit data found in | |
472 | 64 ELF files. Detect this now and abort before we start | |
473 | overwriting things. */ | |
474 | if (sizeof (bfd_vma) < 8) | |
475 | { | |
3284fe0c | 476 | error (_("This executable has been built without support for a\n\ |
30fd33bb L |
477 | 64 bit data type and so it cannot process 64 bit ELF files.\n")); |
478 | return 0; | |
479 | } | |
480 | ||
481 | if (fread (ehdr64.e_type, sizeof (ehdr64) - EI_NIDENT, | |
482 | 1, file) != 1) | |
483 | return 0; | |
484 | ||
485 | elf_header.e_type = BYTE_GET (ehdr64.e_type); | |
486 | elf_header.e_machine = BYTE_GET (ehdr64.e_machine); | |
487 | elf_header.e_version = BYTE_GET (ehdr64.e_version); | |
488 | elf_header.e_entry = BYTE_GET (ehdr64.e_entry); | |
489 | elf_header.e_phoff = BYTE_GET (ehdr64.e_phoff); | |
490 | elf_header.e_shoff = BYTE_GET (ehdr64.e_shoff); | |
491 | elf_header.e_flags = BYTE_GET (ehdr64.e_flags); | |
492 | elf_header.e_ehsize = BYTE_GET (ehdr64.e_ehsize); | |
493 | elf_header.e_phentsize = BYTE_GET (ehdr64.e_phentsize); | |
494 | elf_header.e_phnum = BYTE_GET (ehdr64.e_phnum); | |
495 | elf_header.e_shentsize = BYTE_GET (ehdr64.e_shentsize); | |
496 | elf_header.e_shnum = BYTE_GET (ehdr64.e_shnum); | |
497 | elf_header.e_shstrndx = BYTE_GET (ehdr64.e_shstrndx); | |
498 | ||
499 | memcpy (&ehdr64, &elf_header, EI_NIDENT); | |
500 | break; | |
501 | } | |
502 | return 1; | |
503 | } | |
504 | ||
505 | /* Process one ELF object file according to the command line options. | |
506 | This file may actually be stored in an archive. The file is | |
507 | positioned at the start of the ELF object. */ | |
508 | ||
509 | static int | |
510 | process_object (const char *file_name, FILE *file) | |
511 | { | |
512 | /* Rememeber where we are. */ | |
513 | long offset = ftell (file); | |
514 | ||
515 | if (! get_file_header (file)) | |
516 | { | |
3284fe0c | 517 | error (_("%s: Failed to read ELF header\n"), file_name); |
30fd33bb L |
518 | return 1; |
519 | } | |
520 | ||
521 | /* Go to the position of the ELF header. */ | |
522 | if (fseek (file, offset, SEEK_SET) != 0) | |
523 | { | |
3284fe0c | 524 | error (_("%s: Failed to seek to ELF header\n"), file_name); |
30fd33bb L |
525 | } |
526 | ||
527 | if (! update_elf_header (file_name, file)) | |
528 | return 1; | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
30fd33bb L |
533 | /* Process an ELF archive. |
534 | On entry the file is positioned just after the ARMAG string. */ | |
535 | ||
536 | static int | |
537 | process_archive (const char * file_name, FILE * file, | |
538 | bfd_boolean is_thin_archive) | |
539 | { | |
540 | struct archive_info arch; | |
541 | struct archive_info nested_arch; | |
542 | size_t got; | |
30fd33bb L |
543 | int ret; |
544 | ||
545 | /* The ARCH structure is used to hold information about this archive. */ | |
546 | arch.file_name = NULL; | |
547 | arch.file = NULL; | |
548 | arch.index_array = NULL; | |
549 | arch.sym_table = NULL; | |
550 | arch.longnames = NULL; | |
551 | ||
552 | /* The NESTED_ARCH structure is used as a single-item cache of information | |
553 | about a nested archive (when members of a thin archive reside within | |
554 | another regular archive file). */ | |
555 | nested_arch.file_name = NULL; | |
556 | nested_arch.file = NULL; | |
557 | nested_arch.index_array = NULL; | |
558 | nested_arch.sym_table = NULL; | |
559 | nested_arch.longnames = NULL; | |
560 | ||
3284fe0c | 561 | if (setup_archive (&arch, file_name, file, is_thin_archive, FALSE) != 0) |
30fd33bb L |
562 | { |
563 | ret = 1; | |
564 | goto out; | |
565 | } | |
566 | ||
30fd33bb L |
567 | ret = 0; |
568 | ||
569 | while (1) | |
570 | { | |
571 | char * name; | |
572 | size_t namelen; | |
573 | char * qualified_name; | |
574 | ||
575 | /* Read the next archive header. */ | |
576 | if (fseek (file, arch.next_arhdr_offset, SEEK_SET) != 0) | |
577 | { | |
3284fe0c | 578 | error (_("%s: failed to seek to next archive header\n"), |
30fd33bb L |
579 | file_name); |
580 | return 1; | |
581 | } | |
582 | got = fread (&arch.arhdr, 1, sizeof arch.arhdr, file); | |
583 | if (got != sizeof arch.arhdr) | |
584 | { | |
585 | if (got == 0) | |
586 | break; | |
3284fe0c | 587 | error (_("%s: failed to read archive header\n"), |
30fd33bb L |
588 | file_name); |
589 | ret = 1; | |
590 | break; | |
591 | } | |
592 | if (memcmp (arch.arhdr.ar_fmag, ARFMAG, 2) != 0) | |
593 | { | |
3284fe0c | 594 | error (_("%s: did not find a valid archive header\n"), |
30fd33bb L |
595 | arch.file_name); |
596 | ret = 1; | |
597 | break; | |
598 | } | |
599 | ||
600 | arch.next_arhdr_offset += sizeof arch.arhdr; | |
601 | ||
602 | archive_file_size = strtoul (arch.arhdr.ar_size, NULL, 10); | |
603 | if (archive_file_size & 01) | |
604 | ++archive_file_size; | |
605 | ||
606 | name = get_archive_member_name (&arch, &nested_arch); | |
607 | if (name == NULL) | |
608 | { | |
3284fe0c | 609 | error (_("%s: bad archive file name\n"), file_name); |
30fd33bb L |
610 | ret = 1; |
611 | break; | |
612 | } | |
613 | namelen = strlen (name); | |
614 | ||
615 | qualified_name = make_qualified_name (&arch, &nested_arch, name); | |
616 | if (qualified_name == NULL) | |
617 | { | |
3284fe0c | 618 | error (_("%s: bad archive file name\n"), file_name); |
30fd33bb L |
619 | ret = 1; |
620 | break; | |
621 | } | |
622 | ||
623 | if (is_thin_archive && arch.nested_member_origin == 0) | |
624 | { | |
625 | /* This is a proxy for an external member of a thin archive. */ | |
626 | FILE *member_file; | |
627 | char *member_file_name = adjust_relative_path (file_name, | |
628 | name, namelen); | |
629 | if (member_file_name == NULL) | |
630 | { | |
631 | ret = 1; | |
632 | break; | |
633 | } | |
634 | ||
635 | member_file = fopen (member_file_name, "r+b"); | |
636 | if (member_file == NULL) | |
637 | { | |
3284fe0c | 638 | error (_("Input file '%s' is not readable\n"), |
30fd33bb L |
639 | member_file_name); |
640 | free (member_file_name); | |
641 | ret = 1; | |
642 | break; | |
643 | } | |
644 | ||
645 | archive_file_offset = arch.nested_member_origin; | |
646 | ||
647 | ret |= process_object (qualified_name, member_file); | |
648 | ||
649 | fclose (member_file); | |
650 | free (member_file_name); | |
651 | } | |
652 | else if (is_thin_archive) | |
653 | { | |
654 | /* This is a proxy for a member of a nested archive. */ | |
655 | archive_file_offset = arch.nested_member_origin + sizeof arch.arhdr; | |
656 | ||
657 | /* The nested archive file will have been opened and setup by | |
658 | get_archive_member_name. */ | |
659 | if (fseek (nested_arch.file, archive_file_offset, | |
660 | SEEK_SET) != 0) | |
661 | { | |
3284fe0c | 662 | error (_("%s: failed to seek to archive member\n"), |
30fd33bb L |
663 | nested_arch.file_name); |
664 | ret = 1; | |
665 | break; | |
666 | } | |
667 | ||
668 | ret |= process_object (qualified_name, nested_arch.file); | |
669 | } | |
670 | else | |
671 | { | |
672 | archive_file_offset = arch.next_arhdr_offset; | |
673 | arch.next_arhdr_offset += archive_file_size; | |
674 | ||
675 | ret |= process_object (qualified_name, file); | |
676 | } | |
677 | ||
678 | free (qualified_name); | |
679 | } | |
680 | ||
681 | out: | |
682 | if (nested_arch.file != NULL) | |
683 | fclose (nested_arch.file); | |
684 | release_archive (&nested_arch); | |
685 | release_archive (&arch); | |
686 | ||
687 | return ret; | |
688 | } | |
689 | ||
690 | static int | |
691 | check_file (const char *file_name, struct stat *statbuf_p) | |
692 | { | |
693 | struct stat statbuf; | |
694 | ||
695 | if (statbuf_p == NULL) | |
696 | statbuf_p = &statbuf; | |
697 | ||
698 | if (stat (file_name, statbuf_p) < 0) | |
699 | { | |
700 | if (errno == ENOENT) | |
3284fe0c | 701 | error (_("'%s': No such file\n"), file_name); |
30fd33bb | 702 | else |
3284fe0c | 703 | error (_("Could not locate '%s'. System error message: %s\n"), |
30fd33bb L |
704 | file_name, strerror (errno)); |
705 | return 1; | |
706 | } | |
707 | ||
708 | if (! S_ISREG (statbuf_p->st_mode)) | |
709 | { | |
3284fe0c | 710 | error (_("'%s' is not an ordinary file\n"), file_name); |
30fd33bb L |
711 | return 1; |
712 | } | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
717 | static int | |
718 | process_file (const char *file_name) | |
719 | { | |
720 | FILE * file; | |
721 | char armag[SARMAG]; | |
722 | int ret; | |
723 | ||
724 | if (check_file (file_name, NULL)) | |
725 | return 1; | |
726 | ||
727 | file = fopen (file_name, "r+b"); | |
728 | if (file == NULL) | |
729 | { | |
3284fe0c | 730 | error (_("Input file '%s' is not readable\n"), file_name); |
30fd33bb L |
731 | return 1; |
732 | } | |
733 | ||
734 | if (fread (armag, SARMAG, 1, file) != 1) | |
735 | { | |
3284fe0c | 736 | error (_("%s: Failed to read file's magic number\n"), |
30fd33bb L |
737 | file_name); |
738 | fclose (file); | |
739 | return 1; | |
740 | } | |
741 | ||
742 | if (memcmp (armag, ARMAG, SARMAG) == 0) | |
743 | ret = process_archive (file_name, file, FALSE); | |
744 | else if (memcmp (armag, ARMAGT, SARMAG) == 0) | |
745 | ret = process_archive (file_name, file, TRUE); | |
746 | else | |
747 | { | |
748 | rewind (file); | |
749 | archive_file_size = archive_file_offset = 0; | |
750 | ret = process_object (file_name, file); | |
8a6b075b L |
751 | #ifdef HAVE_MMAP |
752 | if (!ret | |
753 | && (elf_header.e_type == ET_EXEC | |
754 | || elf_header.e_type == ET_DYN)) | |
755 | ret = update_gnu_property (file_name, file); | |
756 | #endif | |
30fd33bb L |
757 | } |
758 | ||
759 | fclose (file); | |
760 | ||
761 | return ret; | |
762 | } | |
763 | ||
d0514c49 L |
764 | static const struct |
765 | { | |
766 | int osabi; | |
767 | const char *name; | |
768 | } | |
769 | osabis[] = | |
770 | { | |
771 | { ELFOSABI_NONE, "none" }, | |
772 | { ELFOSABI_HPUX, "HPUX" }, | |
773 | { ELFOSABI_NETBSD, "NetBSD" }, | |
9c55345c TS |
774 | { ELFOSABI_GNU, "GNU" }, |
775 | { ELFOSABI_GNU, "Linux" }, | |
d0514c49 L |
776 | { ELFOSABI_SOLARIS, "Solaris" }, |
777 | { ELFOSABI_AIX, "AIX" }, | |
778 | { ELFOSABI_IRIX, "Irix" }, | |
779 | { ELFOSABI_FREEBSD, "FreeBSD" }, | |
780 | { ELFOSABI_TRU64, "TRU64" }, | |
781 | { ELFOSABI_MODESTO, "Modesto" }, | |
782 | { ELFOSABI_OPENBSD, "OpenBSD" }, | |
783 | { ELFOSABI_OPENVMS, "OpenVMS" }, | |
784 | { ELFOSABI_NSK, "NSK" }, | |
785 | { ELFOSABI_AROS, "AROS" }, | |
786 | { ELFOSABI_FENIXOS, "FenixOS" } | |
787 | }; | |
788 | ||
789 | /* Return ELFOSABI_XXX for an OSABI string, OSABI. */ | |
790 | ||
791 | static int | |
792 | elf_osabi (const char *osabi) | |
793 | { | |
794 | unsigned int i; | |
795 | ||
796 | for (i = 0; i < ARRAY_SIZE (osabis); i++) | |
797 | if (strcasecmp (osabi, osabis[i].name) == 0) | |
798 | return osabis[i].osabi; | |
799 | ||
3284fe0c | 800 | error (_("Unknown OSABI: %s\n"), osabi); |
d0514c49 L |
801 | |
802 | return -1; | |
803 | } | |
804 | ||
30fd33bb L |
805 | /* Return EM_XXX for a machine string, MACH. */ |
806 | ||
807 | static int | |
808 | elf_machine (const char *mach) | |
809 | { | |
6c14750f L |
810 | if (strcasecmp (mach, "i386") == 0) |
811 | return EM_386; | |
812 | if (strcasecmp (mach, "iamcu") == 0) | |
813 | return EM_IAMCU; | |
30fd33bb L |
814 | if (strcasecmp (mach, "l1om") == 0) |
815 | return EM_L1OM; | |
7a9068fe L |
816 | if (strcasecmp (mach, "k1om") == 0) |
817 | return EM_K1OM; | |
30fd33bb L |
818 | if (strcasecmp (mach, "x86_64") == 0) |
819 | return EM_X86_64; | |
820 | if (strcasecmp (mach, "x86-64") == 0) | |
821 | return EM_X86_64; | |
822 | if (strcasecmp (mach, "none") == 0) | |
823 | return EM_NONE; | |
824 | ||
3284fe0c | 825 | error (_("Unknown machine type: %s\n"), mach); |
30fd33bb L |
826 | |
827 | return -1; | |
828 | } | |
829 | ||
dd35de74 L |
830 | /* Return ET_XXX for a type string, TYPE. */ |
831 | ||
832 | static int | |
833 | elf_type (const char *type) | |
834 | { | |
835 | if (strcasecmp (type, "rel") == 0) | |
836 | return ET_REL; | |
837 | if (strcasecmp (type, "exec") == 0) | |
838 | return ET_EXEC; | |
839 | if (strcasecmp (type, "dyn") == 0) | |
840 | return ET_DYN; | |
841 | if (strcasecmp (type, "none") == 0) | |
842 | return ET_NONE; | |
843 | ||
3284fe0c | 844 | error (_("Unknown type: %s\n"), type); |
dd35de74 L |
845 | |
846 | return -1; | |
847 | } | |
848 | ||
30fd33bb L |
849 | enum command_line_switch |
850 | { | |
851 | OPTION_INPUT_MACH = 150, | |
dd35de74 L |
852 | OPTION_OUTPUT_MACH, |
853 | OPTION_INPUT_TYPE, | |
d0514c49 L |
854 | OPTION_OUTPUT_TYPE, |
855 | OPTION_INPUT_OSABI, | |
8a6b075b L |
856 | OPTION_OUTPUT_OSABI, |
857 | #ifdef HAVE_MMAP | |
858 | OPTION_ENABLE_X86_FEATURE, | |
859 | OPTION_DISABLE_X86_FEATURE, | |
860 | #endif | |
30fd33bb L |
861 | }; |
862 | ||
863 | static struct option options[] = | |
864 | { | |
865 | {"input-mach", required_argument, 0, OPTION_INPUT_MACH}, | |
866 | {"output-mach", required_argument, 0, OPTION_OUTPUT_MACH}, | |
dd35de74 L |
867 | {"input-type", required_argument, 0, OPTION_INPUT_TYPE}, |
868 | {"output-type", required_argument, 0, OPTION_OUTPUT_TYPE}, | |
d0514c49 L |
869 | {"input-osabi", required_argument, 0, OPTION_INPUT_OSABI}, |
870 | {"output-osabi", required_argument, 0, OPTION_OUTPUT_OSABI}, | |
8a6b075b L |
871 | #ifdef HAVE_MMAP |
872 | {"enable-x86-feature", | |
873 | required_argument, 0, OPTION_ENABLE_X86_FEATURE}, | |
874 | {"disable-x86-feature", | |
875 | required_argument, 0, OPTION_DISABLE_X86_FEATURE}, | |
876 | #endif | |
30fd33bb L |
877 | {"version", no_argument, 0, 'v'}, |
878 | {"help", no_argument, 0, 'h'}, | |
879 | {0, no_argument, 0, 0} | |
880 | }; | |
881 | ||
1e0f0b4d | 882 | ATTRIBUTE_NORETURN static void |
30fd33bb L |
883 | usage (FILE *stream, int exit_status) |
884 | { | |
d0514c49 | 885 | fprintf (stream, _("Usage: %s <option(s)> elffile(s)\n"), |
30fd33bb L |
886 | program_name); |
887 | fprintf (stream, _(" Update the ELF header of ELF files\n")); | |
888 | fprintf (stream, _(" The options are:\n")); | |
889 | fprintf (stream, _("\ | |
890 | --input-mach <machine> Set input machine type to <machine>\n\ | |
891 | --output-mach <machine> Set output machine type to <machine>\n\ | |
dd35de74 L |
892 | --input-type <type> Set input file type to <type>\n\ |
893 | --output-type <type> Set output file type to <type>\n\ | |
d0514c49 | 894 | --input-osabi <osabi> Set input OSABI to <osabi>\n\ |
8a6b075b L |
895 | --output-osabi <osabi> Set output OSABI to <osabi>\n")); |
896 | #ifdef HAVE_MMAP | |
897 | fprintf (stream, _("\ | |
898 | --enable-x86-feature <feature>\n\ | |
899 | Enable x86 feature <feature>\n\ | |
900 | --disable-x86-feature <feature>\n\ | |
901 | Disable x86 feature <feature>\n")); | |
902 | #endif | |
903 | fprintf (stream, _("\ | |
30fd33bb L |
904 | -h --help Display this information\n\ |
905 | -v --version Display the version number of %s\n\ | |
906 | "), | |
907 | program_name); | |
908 | if (REPORT_BUGS_TO[0] && exit_status == 0) | |
909 | fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); | |
910 | exit (exit_status); | |
911 | } | |
912 | ||
913 | int | |
914 | main (int argc, char ** argv) | |
915 | { | |
916 | int c, status; | |
917 | ||
918 | #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) | |
919 | setlocale (LC_MESSAGES, ""); | |
920 | #endif | |
921 | #if defined (HAVE_SETLOCALE) | |
922 | setlocale (LC_CTYPE, ""); | |
923 | #endif | |
924 | bindtextdomain (PACKAGE, LOCALEDIR); | |
925 | textdomain (PACKAGE); | |
926 | ||
927 | expandargv (&argc, &argv); | |
928 | ||
929 | while ((c = getopt_long (argc, argv, "hv", | |
930 | options, (int *) 0)) != EOF) | |
931 | { | |
932 | switch (c) | |
933 | { | |
934 | case OPTION_INPUT_MACH: | |
935 | input_elf_machine = elf_machine (optarg); | |
936 | if (input_elf_machine < 0) | |
937 | return 1; | |
938 | input_elf_class = elf_class (input_elf_machine); | |
6c14750f | 939 | if (input_elf_class == ELF_CLASS_UNKNOWN) |
30fd33bb L |
940 | return 1; |
941 | break; | |
942 | ||
943 | case OPTION_OUTPUT_MACH: | |
944 | output_elf_machine = elf_machine (optarg); | |
945 | if (output_elf_machine < 0) | |
946 | return 1; | |
6c14750f L |
947 | output_elf_class = elf_class (output_elf_machine); |
948 | if (output_elf_class == ELF_CLASS_UNKNOWN) | |
949 | return 1; | |
30fd33bb L |
950 | break; |
951 | ||
dd35de74 L |
952 | case OPTION_INPUT_TYPE: |
953 | input_elf_type = elf_type (optarg); | |
954 | if (input_elf_type < 0) | |
955 | return 1; | |
956 | break; | |
957 | ||
958 | case OPTION_OUTPUT_TYPE: | |
959 | output_elf_type = elf_type (optarg); | |
960 | if (output_elf_type < 0) | |
961 | return 1; | |
962 | break; | |
963 | ||
d0514c49 L |
964 | case OPTION_INPUT_OSABI: |
965 | input_elf_osabi = elf_osabi (optarg); | |
966 | if (input_elf_osabi < 0) | |
967 | return 1; | |
968 | break; | |
969 | ||
970 | case OPTION_OUTPUT_OSABI: | |
971 | output_elf_osabi = elf_osabi (optarg); | |
972 | if (output_elf_osabi < 0) | |
973 | return 1; | |
974 | break; | |
975 | ||
8a6b075b L |
976 | #ifdef HAVE_MMAP |
977 | case OPTION_ENABLE_X86_FEATURE: | |
978 | if (elf_x86_feature (optarg, 1) < 0) | |
979 | return 1; | |
980 | break; | |
981 | ||
982 | case OPTION_DISABLE_X86_FEATURE: | |
983 | if (elf_x86_feature (optarg, 0) < 0) | |
984 | return 1; | |
985 | break; | |
986 | #endif | |
987 | ||
30fd33bb L |
988 | case 'h': |
989 | usage (stdout, 0); | |
990 | ||
991 | case 'v': | |
992 | print_version (program_name); | |
993 | break; | |
994 | ||
995 | default: | |
996 | usage (stderr, 1); | |
997 | } | |
998 | } | |
999 | ||
dd35de74 L |
1000 | if (optind == argc |
1001 | || (output_elf_machine == -1 | |
8a6b075b L |
1002 | #ifdef HAVE_MMAP |
1003 | && ! enable_x86_features | |
1004 | && ! disable_x86_features | |
1005 | #endif | |
d0514c49 L |
1006 | && output_elf_type == -1 |
1007 | && output_elf_osabi == -1)) | |
30fd33bb L |
1008 | usage (stderr, 1); |
1009 | ||
1010 | status = 0; | |
1011 | while (optind < argc) | |
1012 | status |= process_file (argv[optind++]); | |
1013 | ||
1014 | return status; | |
1015 | } |