Line data Source code
1 : /* Discard section not used at runtime from object files.
2 : Copyright (C) 2000-2012, 2014, 2015, 2016 Red Hat, Inc.
3 : This file is part of elfutils.
4 : Written by Ulrich Drepper <drepper@redhat.com>, 2000.
5 :
6 : This file 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 : elfutils is distributed in the hope that it will be useful, but
12 : 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, see <http://www.gnu.org/licenses/>. */
18 :
19 : #ifdef HAVE_CONFIG_H
20 : # include <config.h>
21 : #endif
22 :
23 : #include <argp.h>
24 : #include <assert.h>
25 : #include <byteswap.h>
26 : #include <endian.h>
27 : #include <error.h>
28 : #include <fcntl.h>
29 : #include <gelf.h>
30 : #include <libelf.h>
31 : #include <libintl.h>
32 : #include <locale.h>
33 : #include <stdbool.h>
34 : #include <stdio.h>
35 : #include <stdio_ext.h>
36 : #include <stdlib.h>
37 : #include <string.h>
38 : #include <unistd.h>
39 : #include <sys/stat.h>
40 : #include <sys/time.h>
41 :
42 : #include <elf-knowledge.h>
43 : #include <libebl.h>
44 : #include "libdwelf.h"
45 : #include <libeu.h>
46 : #include <system.h>
47 : #include <printversion.h>
48 :
49 : typedef uint8_t GElf_Byte;
50 :
51 : /* Name and version of program. */
52 : ARGP_PROGRAM_VERSION_HOOK_DEF = print_version;
53 :
54 : /* Bug report address. */
55 : ARGP_PROGRAM_BUG_ADDRESS_DEF = PACKAGE_BUGREPORT;
56 :
57 :
58 : /* Values for the parameters which have no short form. */
59 : #define OPT_REMOVE_COMMENT 0x100
60 : #define OPT_PERMISSIVE 0x101
61 : #define OPT_STRIP_SECTIONS 0x102
62 : #define OPT_RELOC_DEBUG 0x103
63 :
64 :
65 : /* Definitions of arguments for argp functions. */
66 : static const struct argp_option options[] =
67 : {
68 : { NULL, 0, NULL, 0, N_("Output selection:"), 0 },
69 : { "output", 'o', "FILE", 0, N_("Place stripped output into FILE"), 0 },
70 : { NULL, 'f', "FILE", 0, N_("Extract the removed sections into FILE"), 0 },
71 : { NULL, 'F', "FILE", 0, N_("Embed name FILE instead of -f argument"), 0 },
72 :
73 : { NULL, 0, NULL, 0, N_("Output options:"), 0 },
74 : { "strip-all", 's', NULL, OPTION_HIDDEN, NULL, 0 },
75 : { "strip-debug", 'g', NULL, 0, N_("Remove all debugging symbols"), 0 },
76 : { NULL, 'd', NULL, OPTION_ALIAS, NULL, 0 },
77 : { NULL, 'S', NULL, OPTION_ALIAS, NULL, 0 },
78 : { "strip-sections", OPT_STRIP_SECTIONS, NULL, 0,
79 : N_("Remove section headers (not recommended)"), 0 },
80 : { "preserve-dates", 'p', NULL, 0,
81 : N_("Copy modified/access timestamps to the output"), 0 },
82 : { "reloc-debug-sections", OPT_RELOC_DEBUG, NULL, 0,
83 : N_("Resolve all trivial relocations between debug sections if the removed sections are placed in a debug file (only relevant for ET_REL files, operation is not reversable, needs -f)"), 0 },
84 : { "remove-comment", OPT_REMOVE_COMMENT, NULL, 0,
85 : N_("Remove .comment section"), 0 },
86 : { "remove-section", 'R', "SECTION", OPTION_HIDDEN, NULL, 0 },
87 : { "permissive", OPT_PERMISSIVE, NULL, 0,
88 : N_("Relax a few rules to handle slightly broken ELF files"), 0 },
89 : { NULL, 0, NULL, 0, NULL, 0 }
90 : };
91 :
92 : /* Short description of program. */
93 : static const char doc[] = N_("Discard symbols from object files.");
94 :
95 : /* Strings for arguments in help texts. */
96 : static const char args_doc[] = N_("[FILE...]");
97 :
98 : /* Prototype for option handler. */
99 : static error_t parse_opt (int key, char *arg, struct argp_state *state);
100 :
101 : /* Data structure to communicate with argp functions. */
102 : static struct argp argp =
103 : {
104 : options, parse_opt, args_doc, doc, NULL, NULL, NULL
105 : };
106 :
107 :
108 : /* Print symbols in file named FNAME. */
109 : static int process_file (const char *fname);
110 :
111 : /* Handle one ELF file. */
112 : static int handle_elf (int fd, Elf *elf, const char *prefix,
113 : const char *fname, mode_t mode, struct timespec tvp[2]);
114 :
115 : /* Handle all files contained in the archive. */
116 : static int handle_ar (int fd, Elf *elf, const char *prefix, const char *fname,
117 : struct timespec tvp[2]) __attribute__ ((unused));
118 :
119 : static int debug_fd = -1;
120 : static char *tmp_debug_fname = NULL;
121 :
122 : /* Close debug file descriptor, if opened. And remove temporary debug file. */
123 : static void cleanup_debug (void);
124 :
125 : #define INTERNAL_ERROR(fname) \
126 : do { \
127 : cleanup_debug (); \
128 : error (EXIT_FAILURE, 0, gettext ("%s: INTERNAL ERROR %d (%s): %s"), \
129 : fname, __LINE__, PACKAGE_VERSION, elf_errmsg (-1)); \
130 : } while (0)
131 :
132 :
133 : /* Name of the output file. */
134 : static const char *output_fname;
135 :
136 : /* Name of the debug output file. */
137 : static const char *debug_fname;
138 :
139 : /* Name to pretend the debug output file has. */
140 : static const char *debug_fname_embed;
141 :
142 : /* If true output files shall have same date as the input file. */
143 : static bool preserve_dates;
144 :
145 : /* If true .comment sections will be removed. */
146 : static bool remove_comment;
147 :
148 : /* If true remove all debug sections. */
149 : static bool remove_debug;
150 :
151 : /* If true remove all section headers. */
152 : static bool remove_shdrs;
153 :
154 : /* If true relax some ELF rules for input files. */
155 : static bool permissive;
156 :
157 : /* If true perform relocations between debug sections. */
158 : static bool reloc_debug;
159 :
160 :
161 : int
162 48 : main (int argc, char *argv[])
163 : {
164 : int remaining;
165 48 : int result = 0;
166 :
167 : /* We use no threads here which can interfere with handling a stream. */
168 48 : __fsetlocking (stdin, FSETLOCKING_BYCALLER);
169 48 : __fsetlocking (stdout, FSETLOCKING_BYCALLER);
170 48 : __fsetlocking (stderr, FSETLOCKING_BYCALLER);
171 :
172 : /* Set locale. */
173 48 : setlocale (LC_ALL, "");
174 :
175 : /* Make sure the message catalog can be found. */
176 48 : bindtextdomain (PACKAGE_TARNAME, LOCALEDIR);
177 :
178 : /* Initialize the message catalog. */
179 48 : textdomain (PACKAGE_TARNAME);
180 :
181 : /* Parse and process arguments. */
182 48 : if (argp_parse (&argp, argc, argv, 0, &remaining, NULL) != 0)
183 : return EXIT_FAILURE;
184 :
185 48 : if (reloc_debug && debug_fname == NULL)
186 : error (EXIT_FAILURE, 0,
187 0 : gettext ("--reloc-debug-sections used without -f"));
188 :
189 : /* Tell the library which version we are expecting. */
190 48 : elf_version (EV_CURRENT);
191 :
192 48 : if (remaining == argc)
193 : /* The user didn't specify a name so we use a.out. */
194 0 : result = process_file ("a.out");
195 : else
196 : {
197 : /* If we have seen the '-o' or '-f' option there must be exactly one
198 : input file. */
199 48 : if ((output_fname != NULL || debug_fname != NULL)
200 36 : && remaining + 1 < argc)
201 0 : error (EXIT_FAILURE, 0, gettext ("\
202 : Only one input file allowed together with '-o' and '-f'"));
203 :
204 : /* Process all the remaining files. */
205 : do
206 48 : result |= process_file (argv[remaining]);
207 48 : while (++remaining < argc);
208 : }
209 :
210 : return result;
211 : }
212 :
213 :
214 : /* Handle program arguments. */
215 : static error_t
216 322 : parse_opt (int key, char *arg, struct argp_state *state)
217 : {
218 322 : switch (key)
219 : {
220 : case 'f':
221 30 : if (debug_fname != NULL)
222 : {
223 0 : error (0, 0, gettext ("-f option specified twice"));
224 0 : return EINVAL;
225 : }
226 30 : debug_fname = arg;
227 30 : break;
228 :
229 : case 'F':
230 6 : if (debug_fname_embed != NULL)
231 : {
232 0 : error (0, 0, gettext ("-F option specified twice"));
233 0 : return EINVAL;
234 : }
235 6 : debug_fname_embed = arg;
236 6 : break;
237 :
238 : case 'o':
239 36 : if (output_fname != NULL)
240 : {
241 0 : error (0, 0, gettext ("-o option specified twice"));
242 0 : return EINVAL;
243 : }
244 36 : output_fname = arg;
245 36 : break;
246 :
247 : case 'p':
248 0 : preserve_dates = true;
249 0 : break;
250 :
251 : case OPT_RELOC_DEBUG:
252 10 : reloc_debug = true;
253 10 : break;
254 :
255 : case OPT_REMOVE_COMMENT:
256 0 : remove_comment = true;
257 0 : break;
258 :
259 : case 'R':
260 0 : if (!strcmp (arg, ".comment"))
261 0 : remove_comment = true;
262 : else
263 : {
264 0 : argp_error (state,
265 0 : gettext ("-R option supports only .comment section"));
266 0 : return EINVAL;
267 : }
268 0 : break;
269 :
270 : case 'g':
271 : case 'd':
272 : case 'S':
273 0 : remove_debug = true;
274 0 : break;
275 :
276 : case OPT_STRIP_SECTIONS:
277 0 : remove_shdrs = true;
278 0 : break;
279 :
280 : case OPT_PERMISSIVE:
281 0 : permissive = true;
282 0 : break;
283 :
284 : case 's': /* Ignored for compatibility. */
285 : break;
286 :
287 : default:
288 : return ARGP_ERR_UNKNOWN;
289 : }
290 : return 0;
291 : }
292 :
293 :
294 : static int
295 48 : process_file (const char *fname)
296 : {
297 : /* If we have to preserve the modify and access timestamps get them
298 : now. We cannot use fstat() after opening the file since the open
299 : would change the access time. */
300 : struct stat pre_st;
301 : struct timespec tv[2];
302 : again:
303 48 : if (preserve_dates)
304 : {
305 0 : if (stat (fname, &pre_st) != 0)
306 : {
307 0 : error (0, errno, gettext ("cannot stat input file '%s'"), fname);
308 0 : return 1;
309 : }
310 :
311 : /* If we have to preserve the timestamp, we need it in the
312 : format utimes() understands. */
313 0 : tv[0] = pre_st.st_atim;
314 0 : tv[1] = pre_st.st_mtim;
315 : }
316 :
317 : /* Open the file. */
318 96 : int fd = open (fname, output_fname == NULL ? O_RDWR : O_RDONLY);
319 48 : if (fd == -1)
320 : {
321 0 : error (0, errno, gettext ("while opening '%s'"), fname);
322 0 : return 1;
323 : }
324 :
325 : /* We always use fstat() even if we called stat() before. This is
326 : done to make sure the information returned by stat() is for the
327 : same file. */
328 : struct stat st;
329 48 : if (fstat (fd, &st) != 0)
330 : {
331 0 : error (0, errno, gettext ("cannot stat input file '%s'"), fname);
332 0 : return 1;
333 : }
334 : /* Paranoid mode on. */
335 48 : if (preserve_dates
336 0 : && (st.st_ino != pre_st.st_ino || st.st_dev != pre_st.st_dev))
337 : {
338 : /* We detected a race. Try again. */
339 0 : close (fd);
340 0 : goto again;
341 : }
342 :
343 : /* Now get the ELF descriptor. */
344 48 : Elf *elf = elf_begin (fd, output_fname == NULL ? ELF_C_RDWR : ELF_C_READ,
345 : NULL);
346 : int result;
347 48 : switch (elf_kind (elf))
348 : {
349 : case ELF_K_ELF:
350 48 : result = handle_elf (fd, elf, NULL, fname, st.st_mode & ACCESSPERMS,
351 48 : preserve_dates ? tv : NULL);
352 48 : break;
353 :
354 : case ELF_K_AR:
355 : /* It is not possible to strip the content of an archive direct
356 : the output to a specific file. */
357 0 : if (unlikely (output_fname != NULL || debug_fname != NULL))
358 : {
359 0 : error (0, 0, gettext ("%s: cannot use -o or -f when stripping archive"),
360 : fname);
361 0 : result = 1;
362 : }
363 : else
364 : {
365 : /* We would like to support ar archives, but currently it just
366 : doesn't work at all since we call elf_clone on the members
367 : which doesn't really support ar members.
368 : result = handle_ar (fd, elf, NULL, fname,
369 : preserve_dates ? tv : NULL);
370 : */
371 0 : error (0, 0, gettext ("%s: no support for stripping archive"),
372 : fname);
373 0 : result = 1;
374 : }
375 : break;
376 :
377 : default:
378 0 : error (0, 0, gettext ("%s: File format not recognized"), fname);
379 0 : result = 1;
380 0 : break;
381 : }
382 :
383 48 : if (unlikely (elf_end (elf) != 0))
384 0 : INTERNAL_ERROR (fname);
385 :
386 48 : close (fd);
387 :
388 48 : return result;
389 : }
390 :
391 :
392 : /* Maximum size of array allocated on stack. */
393 : #define MAX_STACK_ALLOC (400 * 1024)
394 :
395 : static int
396 48 : handle_elf (int fd, Elf *elf, const char *prefix, const char *fname,
397 : mode_t mode, struct timespec tvp[2])
398 : {
399 48 : size_t prefix_len = prefix == NULL ? 0 : strlen (prefix);
400 48 : size_t fname_len = strlen (fname) + 1;
401 48 : char *fullname = alloca (prefix_len + 1 + fname_len);
402 48 : char *cp = fullname;
403 48 : Elf *debugelf = NULL;
404 48 : tmp_debug_fname = NULL;
405 48 : int result = 0;
406 48 : size_t shdridx = 0;
407 : size_t shstrndx;
408 : struct shdr_info
409 : {
410 : Elf_Scn *scn;
411 : GElf_Shdr shdr;
412 : Elf_Data *data;
413 : Elf_Data *debug_data;
414 : const char *name;
415 : Elf32_Word idx; /* Index in new file. */
416 : Elf32_Word old_sh_link; /* Original value of shdr.sh_link. */
417 : Elf32_Word symtab_idx;
418 : Elf32_Word version_idx;
419 : Elf32_Word group_idx;
420 : Elf32_Word group_cnt;
421 : Elf_Scn *newscn;
422 : Dwelf_Strent *se;
423 : Elf32_Word *newsymidx;
424 48 : } *shdr_info = NULL;
425 : Elf_Scn *scn;
426 : size_t cnt;
427 : size_t idx;
428 : bool changes;
429 : GElf_Ehdr newehdr_mem;
430 : GElf_Ehdr *newehdr;
431 : GElf_Ehdr debugehdr_mem;
432 : GElf_Ehdr *debugehdr;
433 48 : Dwelf_Strtab *shst = NULL;
434 : Elf_Data debuglink_crc_data;
435 48 : bool any_symtab_changes = false;
436 48 : Elf_Data *shstrtab_data = NULL;
437 48 : void *debuglink_buf = NULL;
438 :
439 : /* Create the full name of the file. */
440 48 : if (prefix != NULL)
441 : {
442 0 : cp = mempcpy (cp, prefix, prefix_len);
443 0 : *cp++ = ':';
444 : }
445 96 : memcpy (cp, fname, fname_len);
446 :
447 : /* If we are not replacing the input file open a new file here. */
448 48 : if (output_fname != NULL)
449 : {
450 72 : fd = open (output_fname, O_RDWR | O_CREAT, mode);
451 36 : if (unlikely (fd == -1))
452 : {
453 0 : error (0, errno, gettext ("cannot open '%s'"), output_fname);
454 0 : return 1;
455 : }
456 : }
457 :
458 48 : debug_fd = -1;
459 :
460 : /* Get the EBL handling. Removing all debugging symbols with the -g
461 : option or resolving all relocations between debug sections with
462 : the --reloc-debug-sections option are currently the only reasons
463 : we need EBL so don't open the backend unless necessary. */
464 48 : Ebl *ebl = NULL;
465 48 : if (remove_debug || reloc_debug)
466 : {
467 10 : ebl = ebl_openbackend (elf);
468 10 : if (ebl == NULL)
469 : {
470 0 : error (0, errno, gettext ("cannot open EBL backend"));
471 0 : result = 1;
472 0 : goto fail;
473 : }
474 : }
475 :
476 : /* Open the additional file the debug information will be stored in. */
477 48 : if (debug_fname != NULL)
478 : {
479 : /* Create a temporary file name. We do not want to overwrite
480 : the debug file if the file would not contain any
481 : information. */
482 30 : size_t debug_fname_len = strlen (debug_fname);
483 30 : tmp_debug_fname = (char *) xmalloc (debug_fname_len + sizeof (".XXXXXX"));
484 90 : strcpy (mempcpy (tmp_debug_fname, debug_fname, debug_fname_len),
485 : ".XXXXXX");
486 :
487 30 : debug_fd = mkstemp (tmp_debug_fname);
488 30 : if (unlikely (debug_fd == -1))
489 : {
490 0 : error (0, errno, gettext ("cannot open '%s'"), debug_fname);
491 0 : result = 1;
492 0 : goto fail;
493 : }
494 : }
495 :
496 : /* Get the information from the old file. */
497 : GElf_Ehdr ehdr_mem;
498 48 : GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem);
499 48 : if (ehdr == NULL)
500 0 : INTERNAL_ERROR (fname);
501 :
502 : /* Get the section header string table index. */
503 48 : if (unlikely (elf_getshdrstrndx (elf, &shstrndx) < 0))
504 : {
505 0 : cleanup_debug ();
506 : error (EXIT_FAILURE, 0,
507 0 : gettext ("cannot get section header string table index"));
508 : }
509 :
510 : /* Get the number of phdrs in the old file. */
511 : size_t phnum;
512 48 : if (elf_getphdrnum (elf, &phnum) != 0)
513 : {
514 0 : cleanup_debug ();
515 0 : error (EXIT_FAILURE, 0, gettext ("cannot get number of phdrs"));
516 : }
517 :
518 : /* We now create a new ELF descriptor for the same file. We
519 : construct it almost exactly in the same way with some information
520 : dropped. */
521 : Elf *newelf;
522 48 : if (output_fname != NULL)
523 36 : newelf = elf_begin (fd, ELF_C_WRITE_MMAP, NULL);
524 : else
525 12 : newelf = elf_clone (elf, ELF_C_EMPTY);
526 :
527 48 : if (unlikely (gelf_newehdr (newelf, gelf_getclass (elf)) == 0)
528 48 : || (ehdr->e_type != ET_REL
529 22 : && unlikely (gelf_newphdr (newelf, phnum) == 0)))
530 : {
531 0 : error (0, 0, gettext ("cannot create new file '%s': %s"),
532 0 : output_fname ?: fname, elf_errmsg (-1));
533 : goto fail;
534 : }
535 :
536 : /* Copy over the old program header if needed. */
537 48 : if (ehdr->e_type != ET_REL)
538 180 : for (cnt = 0; cnt < phnum; ++cnt)
539 : {
540 : GElf_Phdr phdr_mem;
541 158 : GElf_Phdr *phdr = gelf_getphdr (elf, cnt, &phdr_mem);
542 158 : if (phdr == NULL
543 158 : || unlikely (gelf_update_phdr (newelf, cnt, phdr) == 0))
544 0 : INTERNAL_ERROR (fname);
545 : }
546 :
547 48 : if (debug_fname != NULL)
548 : {
549 : /* Also create an ELF descriptor for the debug file */
550 30 : debugelf = elf_begin (debug_fd, ELF_C_WRITE_MMAP, NULL);
551 30 : if (unlikely (gelf_newehdr (debugelf, gelf_getclass (elf)) == 0)
552 30 : || (ehdr->e_type != ET_REL
553 8 : && unlikely (gelf_newphdr (debugelf, phnum) == 0)))
554 : {
555 0 : error (0, 0, gettext ("cannot create new file '%s': %s"),
556 : debug_fname, elf_errmsg (-1));
557 : goto fail_close;
558 : }
559 :
560 : /* Copy over the old program header if needed. */
561 30 : if (ehdr->e_type != ET_REL)
562 68 : for (cnt = 0; cnt < phnum; ++cnt)
563 : {
564 : GElf_Phdr phdr_mem;
565 60 : GElf_Phdr *phdr = gelf_getphdr (elf, cnt, &phdr_mem);
566 60 : if (phdr == NULL
567 60 : || unlikely (gelf_update_phdr (debugelf, cnt, phdr) == 0))
568 0 : INTERNAL_ERROR (fname);
569 : }
570 : }
571 :
572 : /* Number of sections. */
573 : size_t shnum;
574 48 : if (unlikely (elf_getshdrnum (elf, &shnum) < 0))
575 : {
576 0 : error (0, 0, gettext ("cannot determine number of sections: %s"),
577 : elf_errmsg (-1));
578 : goto fail_close;
579 : }
580 :
581 48 : if (shstrndx >= shnum)
582 : goto illformed;
583 :
584 : #define elf_assert(test) do { if (!(test)) goto illformed; } while (0)
585 :
586 : /* Storage for section information. We leave room for two more
587 : entries since we unconditionally create a section header string
588 : table. Maybe some weird tool created an ELF file without one.
589 : The other one is used for the debug link section. */
590 48 : if ((shnum + 2) * sizeof (struct shdr_info) > MAX_STACK_ALLOC)
591 0 : shdr_info = (struct shdr_info *) xcalloc (shnum + 2,
592 : sizeof (struct shdr_info));
593 : else
594 : {
595 48 : shdr_info = (struct shdr_info *) alloca ((shnum + 2)
596 : * sizeof (struct shdr_info));
597 48 : memset (shdr_info, '\0', (shnum + 2) * sizeof (struct shdr_info));
598 : }
599 :
600 : /* Prepare section information data structure. */
601 48 : scn = NULL;
602 48 : cnt = 1;
603 1622 : while ((scn = elf_nextscn (elf, scn)) != NULL)
604 : {
605 : /* This should always be true (i.e., there should not be any
606 : holes in the numbering). */
607 1526 : elf_assert (elf_ndxscn (scn) == cnt);
608 :
609 1526 : shdr_info[cnt].scn = scn;
610 :
611 : /* Get the header. */
612 1526 : if (gelf_getshdr (scn, &shdr_info[cnt].shdr) == NULL)
613 0 : INTERNAL_ERROR (fname);
614 :
615 : /* Get the name of the section. */
616 3052 : shdr_info[cnt].name = elf_strptr (elf, shstrndx,
617 1526 : shdr_info[cnt].shdr.sh_name);
618 1526 : if (shdr_info[cnt].name == NULL)
619 : {
620 : illformed:
621 0 : error (0, 0, gettext ("illformed file '%s'"), fname);
622 : goto fail_close;
623 : }
624 :
625 : /* Mark them as present but not yet investigated. */
626 1526 : shdr_info[cnt].idx = 1;
627 :
628 : /* Remember the shdr.sh_link value. */
629 1526 : shdr_info[cnt].old_sh_link = shdr_info[cnt].shdr.sh_link;
630 1526 : if (shdr_info[cnt].old_sh_link >= shnum)
631 : goto illformed;
632 :
633 : /* Sections in files other than relocatable object files which
634 : not loaded can be freely moved by us. In theory we can also
635 : freely move around allocated nobits sections. But we don't
636 : to keep the layout of all allocated sections as similar as
637 : possible to the original file. In relocatable object files
638 : everything can be moved. */
639 1526 : if (ehdr->e_type == ET_REL
640 763 : || (shdr_info[cnt].shdr.sh_flags & SHF_ALLOC) == 0)
641 1009 : shdr_info[cnt].shdr.sh_offset = 0;
642 :
643 : /* If this is an extended section index table store an
644 : appropriate reference. */
645 1526 : if (unlikely (shdr_info[cnt].shdr.sh_type == SHT_SYMTAB_SHNDX))
646 : {
647 0 : elf_assert (shdr_info[shdr_info[cnt].shdr.sh_link].symtab_idx == 0);
648 0 : shdr_info[shdr_info[cnt].shdr.sh_link].symtab_idx = cnt;
649 : }
650 1526 : else if (unlikely (shdr_info[cnt].shdr.sh_type == SHT_GROUP))
651 : {
652 : /* Cross-reference the sections contained in the section
653 : group. */
654 3 : shdr_info[cnt].data = elf_getdata (shdr_info[cnt].scn, NULL);
655 3 : if (shdr_info[cnt].data == NULL
656 3 : || shdr_info[cnt].data->d_size < sizeof (Elf32_Word))
657 0 : INTERNAL_ERROR (fname);
658 :
659 : /* XXX Fix for unaligned access. */
660 3 : Elf32_Word *grpref = (Elf32_Word *) shdr_info[cnt].data->d_buf;
661 : size_t inner;
662 9 : for (inner = 1;
663 6 : inner < shdr_info[cnt].data->d_size / sizeof (Elf32_Word);
664 3 : ++inner)
665 : {
666 3 : if (grpref[inner] < shnum)
667 3 : shdr_info[grpref[inner]].group_idx = cnt;
668 : else
669 : goto illformed;
670 : }
671 :
672 3 : if (inner == 1 || (inner == 2 && (grpref[0] & GRP_COMDAT) == 0))
673 : /* If the section group contains only one element and this
674 : is n COMDAT section we can drop it right away. */
675 0 : shdr_info[cnt].idx = 0;
676 : else
677 3 : shdr_info[cnt].group_cnt = inner - 1;
678 : }
679 1523 : else if (unlikely (shdr_info[cnt].shdr.sh_type == SHT_GNU_versym))
680 : {
681 22 : elf_assert (shdr_info[shdr_info[cnt].shdr.sh_link].version_idx == 0);
682 22 : shdr_info[shdr_info[cnt].shdr.sh_link].version_idx = cnt;
683 : }
684 :
685 : /* If this section is part of a group make sure it is not
686 : discarded right away. */
687 1526 : if ((shdr_info[cnt].shdr.sh_flags & SHF_GROUP) != 0)
688 : {
689 3 : elf_assert (shdr_info[cnt].group_idx != 0);
690 :
691 3 : if (shdr_info[shdr_info[cnt].group_idx].idx == 0)
692 : {
693 : /* The section group section will be removed. */
694 0 : shdr_info[cnt].group_idx = 0;
695 0 : shdr_info[cnt].shdr.sh_flags &= ~SHF_GROUP;
696 : }
697 : }
698 :
699 : /* Increment the counter. */
700 1526 : ++cnt;
701 : }
702 :
703 : /* Now determine which sections can go away. The general rule is that
704 : all sections which are not used at runtime are stripped out. But
705 : there are a few exceptions:
706 :
707 : - special sections named ".comment" and ".note" are kept
708 : - OS or architecture specific sections are kept since we might not
709 : know how to handle them
710 : - if a section is referred to from a section which is not removed
711 : in the sh_link or sh_info element it cannot be removed either
712 : */
713 1574 : for (cnt = 1; cnt < shnum; ++cnt)
714 : /* Check whether the section can be removed. */
715 3052 : if (remove_shdrs ? !(shdr_info[cnt].shdr.sh_flags & SHF_ALLOC)
716 3052 : : ebl_section_strip_p (ebl, ehdr, &shdr_info[cnt].shdr,
717 1526 : shdr_info[cnt].name, remove_comment,
718 : remove_debug))
719 : {
720 : /* For now assume this section will be removed. */
721 744 : shdr_info[cnt].idx = 0;
722 :
723 744 : idx = shdr_info[cnt].group_idx;
724 1489 : while (idx != 0)
725 : {
726 : /* The section group data is already loaded. */
727 1 : elf_assert (shdr_info[idx].data != NULL
728 : && shdr_info[idx].data->d_buf != NULL
729 : && shdr_info[idx].data->d_size >= sizeof (Elf32_Word));
730 :
731 : /* If the references section group is a normal section
732 : group and has one element remaining, or if it is an
733 : empty COMDAT section group it is removed. */
734 2 : bool is_comdat = (((Elf32_Word *) shdr_info[idx].data->d_buf)[0]
735 1 : & GRP_COMDAT) != 0;
736 :
737 1 : --shdr_info[idx].group_cnt;
738 1 : if ((!is_comdat && shdr_info[idx].group_cnt == 1)
739 1 : || (is_comdat && shdr_info[idx].group_cnt == 0))
740 : {
741 1 : shdr_info[idx].idx = 0;
742 : /* Continue recursively. */
743 1 : idx = shdr_info[idx].group_idx;
744 : }
745 : else
746 : break;
747 : }
748 : }
749 :
750 : /* Mark the SHT_NULL section as handled. */
751 48 : shdr_info[0].idx = 2;
752 :
753 :
754 : /* Handle exceptions: section groups and cross-references. We might
755 : have to repeat this a few times since the resetting of the flag
756 : might propagate. */
757 : do
758 : {
759 48 : changes = false;
760 :
761 1574 : for (cnt = 1; cnt < shnum; ++cnt)
762 : {
763 1526 : if (shdr_info[cnt].idx == 0)
764 : {
765 : /* If a relocation section is marked as being removed make
766 : sure the section it is relocating is removed, too. */
767 1384 : if (shdr_info[cnt].shdr.sh_type == SHT_REL
768 692 : || shdr_info[cnt].shdr.sh_type == SHT_RELA)
769 : {
770 234 : if (shdr_info[cnt].shdr.sh_info >= shnum)
771 : goto illformed;
772 234 : else if (shdr_info[shdr_info[cnt].shdr.sh_info].idx != 0)
773 104 : shdr_info[cnt].idx = 1;
774 : }
775 :
776 : /* If a group section is marked as being removed make
777 : sure all the sections it contains are being removed, too. */
778 692 : if (shdr_info[cnt].shdr.sh_type == SHT_GROUP)
779 : {
780 : Elf32_Word *grpref;
781 3 : grpref = (Elf32_Word *) shdr_info[cnt].data->d_buf;
782 7 : for (size_t in = 1;
783 4 : in < shdr_info[cnt].data->d_size / sizeof (Elf32_Word);
784 1 : ++in)
785 3 : if (grpref[in] < shnum)
786 : {
787 3 : if (shdr_info[grpref[in]].idx != 0)
788 : {
789 2 : shdr_info[cnt].idx = 1;
790 2 : break;
791 : }
792 : }
793 : else
794 : goto illformed;
795 : }
796 : }
797 :
798 1526 : if (shdr_info[cnt].idx == 1)
799 : {
800 : /* The content of symbol tables we don't remove must not
801 : reference any section which we do remove. Otherwise
802 : we cannot remove the section. */
803 940 : if (debug_fname != NULL
804 554 : && shdr_info[cnt].debug_data == NULL
805 1020 : && (shdr_info[cnt].shdr.sh_type == SHT_DYNSYM
806 510 : || shdr_info[cnt].shdr.sh_type == SHT_SYMTAB))
807 : {
808 : /* Make sure the data is loaded. */
809 8 : if (shdr_info[cnt].data == NULL)
810 : {
811 : shdr_info[cnt].data
812 8 : = elf_getdata (shdr_info[cnt].scn, NULL);
813 8 : if (shdr_info[cnt].data == NULL)
814 0 : INTERNAL_ERROR (fname);
815 : }
816 8 : Elf_Data *symdata = shdr_info[cnt].data;
817 :
818 : /* If there is an extended section index table load it
819 : as well. */
820 8 : if (shdr_info[cnt].symtab_idx != 0
821 0 : && shdr_info[shdr_info[cnt].symtab_idx].data == NULL)
822 : {
823 0 : elf_assert (shdr_info[cnt].shdr.sh_type == SHT_SYMTAB);
824 :
825 : shdr_info[shdr_info[cnt].symtab_idx].data
826 0 : = elf_getdata (shdr_info[shdr_info[cnt].symtab_idx].scn,
827 : NULL);
828 0 : if (shdr_info[shdr_info[cnt].symtab_idx].data == NULL)
829 0 : INTERNAL_ERROR (fname);
830 : }
831 8 : Elf_Data *xndxdata
832 8 : = shdr_info[shdr_info[cnt].symtab_idx].data;
833 :
834 : /* Go through all symbols and make sure the section they
835 : reference is not removed. */
836 8 : size_t elsize = gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT);
837 :
838 378 : for (size_t inner = 0;
839 370 : inner < shdr_info[cnt].data->d_size / elsize;
840 362 : ++inner)
841 : {
842 : GElf_Sym sym_mem;
843 : Elf32_Word xndx;
844 362 : GElf_Sym *sym = gelf_getsymshndx (symdata, xndxdata,
845 : inner, &sym_mem,
846 : &xndx);
847 362 : if (sym == NULL)
848 0 : INTERNAL_ERROR (fname);
849 :
850 362 : size_t scnidx = sym->st_shndx;
851 362 : if (scnidx == SHN_UNDEF || scnidx >= shnum
852 82 : || (scnidx >= SHN_LORESERVE
853 : && scnidx <= SHN_HIRESERVE
854 82 : && scnidx != SHN_XINDEX)
855 : /* Don't count in the section symbols. */
856 82 : || GELF_ST_TYPE (sym->st_info) == STT_SECTION)
857 : /* This is no section index, leave it alone. */
858 312 : continue;
859 50 : else if (scnidx == SHN_XINDEX)
860 0 : scnidx = xndx;
861 :
862 50 : if (scnidx >= shnum)
863 : goto illformed;
864 :
865 50 : if (shdr_info[scnidx].idx == 0)
866 : /* This symbol table has a real symbol in
867 : a discarded section. So preserve the
868 : original table in the debug file. */
869 0 : shdr_info[cnt].debug_data = symdata;
870 : }
871 : }
872 :
873 : /* Cross referencing happens:
874 : - for the cases the ELF specification says. That are
875 : + SHT_DYNAMIC in sh_link to string table
876 : + SHT_HASH in sh_link to symbol table
877 : + SHT_REL and SHT_RELA in sh_link to symbol table
878 : + SHT_SYMTAB and SHT_DYNSYM in sh_link to string table
879 : + SHT_GROUP in sh_link to symbol table
880 : + SHT_SYMTAB_SHNDX in sh_link to symbol table
881 : Other (OS or architecture-specific) sections might as
882 : well use this field so we process it unconditionally.
883 : - references inside section groups
884 : - specially marked references in sh_info if the SHF_INFO_LINK
885 : flag is set
886 : */
887 :
888 940 : if (shdr_info[shdr_info[cnt].shdr.sh_link].idx == 0)
889 : {
890 52 : shdr_info[shdr_info[cnt].shdr.sh_link].idx = 1;
891 52 : changes |= shdr_info[cnt].shdr.sh_link < cnt;
892 : }
893 :
894 : /* Handle references through sh_info. */
895 940 : if (SH_INFO_LINK_P (&shdr_info[cnt].shdr))
896 : {
897 146 : if (shdr_info[cnt].shdr.sh_info >= shnum)
898 : goto illformed;
899 146 : else if ( shdr_info[shdr_info[cnt].shdr.sh_info].idx == 0)
900 : {
901 0 : shdr_info[shdr_info[cnt].shdr.sh_info].idx = 1;
902 0 : changes |= shdr_info[cnt].shdr.sh_info < cnt;
903 : }
904 : }
905 :
906 : /* Mark the section as investigated. */
907 940 : shdr_info[cnt].idx = 2;
908 : }
909 :
910 1526 : if (debug_fname != NULL
911 940 : && (shdr_info[cnt].idx == 0 || shdr_info[cnt].debug_data != NULL))
912 : {
913 : /* This section is being preserved in the debug file.
914 : Sections it refers to must be preserved there too.
915 :
916 : In this pass we mark sections to be preserved in both
917 : files by setting the .debug_data pointer to the original
918 : file's .data pointer. Below, we'll copy the section
919 : contents. */
920 :
921 540 : inline void check_preserved (size_t i)
922 : {
923 540 : if (i != 0 && i < shnum + 2 && shdr_info[i].idx != 0
924 133 : && shdr_info[i].debug_data == NULL)
925 : {
926 44 : if (shdr_info[i].data == NULL)
927 44 : shdr_info[i].data = elf_getdata (shdr_info[i].scn, NULL);
928 44 : if (shdr_info[i].data == NULL)
929 0 : INTERNAL_ERROR (fname);
930 :
931 44 : shdr_info[i].debug_data = shdr_info[i].data;
932 44 : changes |= i < cnt;
933 : }
934 540 : }
935 :
936 430 : check_preserved (shdr_info[cnt].shdr.sh_link);
937 430 : if (SH_INFO_LINK_P (&shdr_info[cnt].shdr))
938 110 : check_preserved (shdr_info[cnt].shdr.sh_info);
939 : }
940 : }
941 : }
942 48 : while (changes);
943 :
944 : /* Copy the removed sections to the debug output file.
945 : The ones that are not removed in the stripped file are SHT_NOBITS. */
946 48 : if (debug_fname != NULL)
947 : {
948 970 : for (cnt = 1; cnt < shnum; ++cnt)
949 : {
950 940 : scn = elf_newscn (debugelf);
951 940 : if (scn == NULL)
952 : {
953 0 : cleanup_debug ();
954 0 : error (EXIT_FAILURE, 0,
955 0 : gettext ("while generating output file: %s"),
956 : elf_errmsg (-1));
957 : }
958 :
959 1880 : bool discard_section = (shdr_info[cnt].idx > 0
960 554 : && shdr_info[cnt].debug_data == NULL
961 510 : && shdr_info[cnt].shdr.sh_type != SHT_NOTE
962 486 : && shdr_info[cnt].shdr.sh_type != SHT_GROUP
963 1424 : && cnt != ehdr->e_shstrndx);
964 :
965 : /* Set the section header in the new file. */
966 940 : GElf_Shdr debugshdr = shdr_info[cnt].shdr;
967 940 : if (discard_section)
968 484 : debugshdr.sh_type = SHT_NOBITS;
969 :
970 940 : if (unlikely (gelf_update_shdr (scn, &debugshdr) == 0))
971 : /* There cannot be any overflows. */
972 0 : INTERNAL_ERROR (fname);
973 :
974 : /* Get the data from the old file if necessary. */
975 940 : if (shdr_info[cnt].data == NULL)
976 : {
977 885 : shdr_info[cnt].data = elf_getdata (shdr_info[cnt].scn, NULL);
978 885 : if (shdr_info[cnt].data == NULL)
979 0 : INTERNAL_ERROR (fname);
980 : }
981 :
982 : /* Set the data. This is done by copying from the old file. */
983 940 : Elf_Data *debugdata = elf_newdata (scn);
984 940 : if (debugdata == NULL)
985 0 : INTERNAL_ERROR (fname);
986 :
987 : /* Copy the structure. This data may be modified in place
988 : before we write out the file. */
989 940 : *debugdata = *shdr_info[cnt].data;
990 940 : if (discard_section)
991 484 : debugdata->d_buf = NULL;
992 456 : else if (shdr_info[cnt].debug_data != NULL
993 412 : || shdr_info[cnt].shdr.sh_type == SHT_GROUP)
994 : {
995 : /* Copy the original data before it gets modified. */
996 47 : shdr_info[cnt].debug_data = debugdata;
997 47 : if (debugdata->d_buf == NULL)
998 0 : INTERNAL_ERROR (fname);
999 94 : debugdata->d_buf = memcpy (xmalloc (debugdata->d_size),
1000 : debugdata->d_buf, debugdata->d_size);
1001 : }
1002 : }
1003 :
1004 : /* Finish the ELF header. Fill in the fields not handled by
1005 : libelf from the old file. */
1006 30 : debugehdr = gelf_getehdr (debugelf, &debugehdr_mem);
1007 30 : if (debugehdr == NULL)
1008 0 : INTERNAL_ERROR (fname);
1009 :
1010 60 : memcpy (debugehdr->e_ident, ehdr->e_ident, EI_NIDENT);
1011 30 : debugehdr->e_type = ehdr->e_type;
1012 30 : debugehdr->e_machine = ehdr->e_machine;
1013 30 : debugehdr->e_version = ehdr->e_version;
1014 30 : debugehdr->e_entry = ehdr->e_entry;
1015 30 : debugehdr->e_flags = ehdr->e_flags;
1016 30 : debugehdr->e_shstrndx = ehdr->e_shstrndx;
1017 :
1018 30 : if (unlikely (gelf_update_ehdr (debugelf, debugehdr) == 0))
1019 : {
1020 0 : error (0, 0, gettext ("%s: error while creating ELF header: %s"),
1021 : debug_fname, elf_errmsg (-1));
1022 0 : result = 1;
1023 0 : goto fail_close;
1024 : }
1025 : }
1026 :
1027 : /* Although we always create a new section header string table we
1028 : don't explicitly mark the existing one as unused. It can still
1029 : be used through a symbol table section we are keeping. If not it
1030 : will already be marked as unused. */
1031 :
1032 : /* We need a string table for the section headers. */
1033 48 : shst = dwelf_strtab_init (true);
1034 48 : if (shst == NULL)
1035 : {
1036 0 : cleanup_debug ();
1037 0 : error (EXIT_FAILURE, errno, gettext ("while preparing output for '%s'"),
1038 0 : output_fname ?: fname);
1039 : }
1040 :
1041 : /* Assign new section numbers. */
1042 48 : shdr_info[0].idx = 0;
1043 1574 : for (cnt = idx = 1; cnt < shnum; ++cnt)
1044 1526 : if (shdr_info[cnt].idx > 0)
1045 : {
1046 940 : shdr_info[cnt].idx = idx++;
1047 :
1048 : /* Create a new section. */
1049 940 : shdr_info[cnt].newscn = elf_newscn (newelf);
1050 940 : if (shdr_info[cnt].newscn == NULL)
1051 : {
1052 0 : cleanup_debug ();
1053 0 : error (EXIT_FAILURE, 0,
1054 0 : gettext ("while generating output file: %s"),
1055 : elf_errmsg (-1));
1056 : }
1057 :
1058 940 : elf_assert (elf_ndxscn (shdr_info[cnt].newscn) == shdr_info[cnt].idx);
1059 :
1060 : /* Add this name to the section header string table. */
1061 940 : shdr_info[cnt].se = dwelf_strtab_add (shst, shdr_info[cnt].name);
1062 : }
1063 :
1064 : /* Test whether we are doing anything at all. */
1065 48 : if (cnt == idx)
1066 : /* Nope, all removable sections are already gone. */
1067 : goto fail_close;
1068 :
1069 : /* Create the reference to the file with the debug info. */
1070 48 : if (debug_fname != NULL && !remove_shdrs)
1071 : {
1072 : /* Add the section header string table section name. */
1073 30 : shdr_info[cnt].se = dwelf_strtab_add_len (shst, ".gnu_debuglink", 15);
1074 30 : shdr_info[cnt].idx = idx++;
1075 :
1076 : /* Create the section header. */
1077 30 : shdr_info[cnt].shdr.sh_type = SHT_PROGBITS;
1078 30 : shdr_info[cnt].shdr.sh_flags = 0;
1079 30 : shdr_info[cnt].shdr.sh_addr = 0;
1080 30 : shdr_info[cnt].shdr.sh_link = SHN_UNDEF;
1081 30 : shdr_info[cnt].shdr.sh_info = SHN_UNDEF;
1082 30 : shdr_info[cnt].shdr.sh_entsize = 0;
1083 30 : shdr_info[cnt].shdr.sh_addralign = 4;
1084 : /* We set the offset to zero here. Before we write the ELF file the
1085 : field must have the correct value. This is done in the final
1086 : loop over all section. Then we have all the information needed. */
1087 30 : shdr_info[cnt].shdr.sh_offset = 0;
1088 :
1089 : /* Create the section. */
1090 30 : shdr_info[cnt].newscn = elf_newscn (newelf);
1091 30 : if (shdr_info[cnt].newscn == NULL)
1092 : {
1093 0 : cleanup_debug ();
1094 0 : error (EXIT_FAILURE, 0,
1095 0 : gettext ("while create section header section: %s"),
1096 : elf_errmsg (-1));
1097 : }
1098 30 : elf_assert (elf_ndxscn (shdr_info[cnt].newscn) == shdr_info[cnt].idx);
1099 :
1100 30 : shdr_info[cnt].data = elf_newdata (shdr_info[cnt].newscn);
1101 30 : if (shdr_info[cnt].data == NULL)
1102 : {
1103 0 : cleanup_debug ();
1104 0 : error (EXIT_FAILURE, 0, gettext ("cannot allocate section data: %s"),
1105 : elf_errmsg (-1));
1106 : }
1107 :
1108 30 : char *debug_basename = basename (debug_fname_embed ?: debug_fname);
1109 30 : off_t crc_offset = strlen (debug_basename) + 1;
1110 : /* Align to 4 byte boundary */
1111 30 : crc_offset = ((crc_offset - 1) & ~3) + 4;
1112 :
1113 30 : shdr_info[cnt].data->d_align = 4;
1114 30 : shdr_info[cnt].shdr.sh_size = shdr_info[cnt].data->d_size
1115 30 : = crc_offset + 4;
1116 30 : debuglink_buf = xcalloc (1, shdr_info[cnt].data->d_size);
1117 30 : shdr_info[cnt].data->d_buf = debuglink_buf;
1118 :
1119 60 : strcpy (shdr_info[cnt].data->d_buf, debug_basename);
1120 :
1121 : /* Cache this Elf_Data describing the CRC32 word in the section.
1122 : We'll fill this in when we have written the debug file. */
1123 30 : debuglink_crc_data = *shdr_info[cnt].data;
1124 60 : debuglink_crc_data.d_buf = ((char *) debuglink_crc_data.d_buf
1125 30 : + crc_offset);
1126 30 : debuglink_crc_data.d_size = 4;
1127 :
1128 : /* One more section done. */
1129 30 : ++cnt;
1130 : }
1131 :
1132 : /* Index of the section header table in the shdr_info array. */
1133 48 : shdridx = cnt;
1134 :
1135 : /* Add the section header string table section name. */
1136 48 : shdr_info[cnt].se = dwelf_strtab_add_len (shst, ".shstrtab", 10);
1137 48 : shdr_info[cnt].idx = idx;
1138 :
1139 : /* Create the section header. */
1140 48 : shdr_info[cnt].shdr.sh_type = SHT_STRTAB;
1141 48 : shdr_info[cnt].shdr.sh_flags = 0;
1142 48 : shdr_info[cnt].shdr.sh_addr = 0;
1143 48 : shdr_info[cnt].shdr.sh_link = SHN_UNDEF;
1144 48 : shdr_info[cnt].shdr.sh_info = SHN_UNDEF;
1145 48 : shdr_info[cnt].shdr.sh_entsize = 0;
1146 : /* We set the offset to zero here. Before we write the ELF file the
1147 : field must have the correct value. This is done in the final
1148 : loop over all section. Then we have all the information needed. */
1149 48 : shdr_info[cnt].shdr.sh_offset = 0;
1150 48 : shdr_info[cnt].shdr.sh_addralign = 1;
1151 :
1152 : /* Create the section. */
1153 48 : shdr_info[cnt].newscn = elf_newscn (newelf);
1154 48 : if (shdr_info[cnt].newscn == NULL)
1155 : {
1156 0 : cleanup_debug ();
1157 0 : error (EXIT_FAILURE, 0,
1158 0 : gettext ("while create section header section: %s"),
1159 : elf_errmsg (-1));
1160 : }
1161 48 : elf_assert (elf_ndxscn (shdr_info[cnt].newscn) == idx);
1162 :
1163 : /* Finalize the string table and fill in the correct indices in the
1164 : section headers. */
1165 48 : shstrtab_data = elf_newdata (shdr_info[cnt].newscn);
1166 48 : if (shstrtab_data == NULL)
1167 : {
1168 0 : cleanup_debug ();
1169 0 : error (EXIT_FAILURE, 0,
1170 0 : gettext ("while create section header string table: %s"),
1171 : elf_errmsg (-1));
1172 : }
1173 48 : if (dwelf_strtab_finalize (shst, shstrtab_data) == NULL)
1174 : {
1175 0 : cleanup_debug ();
1176 : error (EXIT_FAILURE, 0,
1177 0 : gettext ("no memory to create section header string table"));
1178 : }
1179 :
1180 : /* We have to set the section size. */
1181 48 : shdr_info[cnt].shdr.sh_size = shstrtab_data->d_size;
1182 :
1183 : /* Update the section information. */
1184 48 : GElf_Off lastoffset = 0;
1185 1652 : for (cnt = 1; cnt <= shdridx; ++cnt)
1186 1604 : if (shdr_info[cnt].idx > 0)
1187 : {
1188 : Elf_Data *newdata;
1189 :
1190 1018 : scn = elf_getscn (newelf, shdr_info[cnt].idx);
1191 1018 : elf_assert (scn != NULL);
1192 :
1193 : /* Update the name. */
1194 1018 : shdr_info[cnt].shdr.sh_name = dwelf_strent_off (shdr_info[cnt].se);
1195 :
1196 : /* Update the section header from the input file. Some fields
1197 : might be section indeces which now have to be adjusted. */
1198 1018 : if (shdr_info[cnt].shdr.sh_link != 0)
1199 286 : shdr_info[cnt].shdr.sh_link =
1200 286 : shdr_info[shdr_info[cnt].shdr.sh_link].idx;
1201 :
1202 1018 : if (shdr_info[cnt].shdr.sh_type == SHT_GROUP)
1203 : {
1204 2 : elf_assert (shdr_info[cnt].data != NULL
1205 : && shdr_info[cnt].data->d_buf != NULL);
1206 :
1207 : Elf32_Word *grpref = (Elf32_Word *) shdr_info[cnt].data->d_buf;
1208 6 : for (size_t inner = 0;
1209 6 : inner < shdr_info[cnt].data->d_size / sizeof (Elf32_Word);
1210 4 : ++inner)
1211 4 : if (grpref[inner] < shnum)
1212 4 : grpref[inner] = shdr_info[grpref[inner]].idx;
1213 : else
1214 : goto illformed;
1215 : }
1216 :
1217 : /* Handle the SHT_REL, SHT_RELA, and SHF_INFO_LINK flag. */
1218 1018 : if (SH_INFO_LINK_P (&shdr_info[cnt].shdr))
1219 146 : shdr_info[cnt].shdr.sh_info =
1220 146 : shdr_info[shdr_info[cnt].shdr.sh_info].idx;
1221 :
1222 : /* Get the data from the old file if necessary. We already
1223 : created the data for the section header string table. */
1224 1018 : if (cnt < shnum)
1225 : {
1226 940 : if (shdr_info[cnt].data == NULL)
1227 : {
1228 386 : shdr_info[cnt].data = elf_getdata (shdr_info[cnt].scn, NULL);
1229 386 : if (shdr_info[cnt].data == NULL)
1230 0 : INTERNAL_ERROR (fname);
1231 : }
1232 :
1233 : /* Set the data. This is done by copying from the old file. */
1234 940 : newdata = elf_newdata (scn);
1235 940 : if (newdata == NULL)
1236 0 : INTERNAL_ERROR (fname);
1237 :
1238 : /* Copy the structure. */
1239 940 : *newdata = *shdr_info[cnt].data;
1240 :
1241 : /* We know the size. */
1242 940 : shdr_info[cnt].shdr.sh_size = shdr_info[cnt].data->d_size;
1243 :
1244 : /* We have to adjust symbol tables. The st_shndx member might
1245 : have to be updated. */
1246 1880 : if (shdr_info[cnt].shdr.sh_type == SHT_DYNSYM
1247 940 : || shdr_info[cnt].shdr.sh_type == SHT_SYMTAB)
1248 : {
1249 48 : Elf_Data *versiondata = NULL;
1250 48 : Elf_Data *shndxdata = NULL;
1251 :
1252 48 : size_t elsize = gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT);
1253 :
1254 48 : if (shdr_info[cnt].symtab_idx != 0)
1255 : {
1256 0 : elf_assert (shdr_info[cnt].shdr.sh_type == SHT_SYMTAB_SHNDX);
1257 : /* This section has extended section information.
1258 : We have to modify that information, too. */
1259 0 : shndxdata = elf_getdata (shdr_info[shdr_info[cnt].symtab_idx].scn,
1260 : NULL);
1261 :
1262 0 : elf_assert (shndxdata != NULL
1263 : && shndxdata->d_buf != NULL
1264 : && ((shndxdata->d_size / sizeof (Elf32_Word))
1265 : >= shdr_info[cnt].data->d_size / elsize));
1266 : }
1267 :
1268 48 : if (shdr_info[cnt].version_idx != 0)
1269 : {
1270 22 : elf_assert (shdr_info[cnt].shdr.sh_type == SHT_DYNSYM);
1271 : /* This section has associated version
1272 : information. We have to modify that
1273 : information, too. */
1274 22 : versiondata = elf_getdata (shdr_info[shdr_info[cnt].version_idx].scn,
1275 : NULL);
1276 :
1277 22 : elf_assert (versiondata != NULL
1278 : && versiondata->d_buf != NULL
1279 : && ((versiondata->d_size / sizeof (GElf_Versym))
1280 : >= shdr_info[cnt].data->d_size / elsize));
1281 : }
1282 :
1283 48 : shdr_info[cnt].newsymidx
1284 48 : = (Elf32_Word *) xcalloc (shdr_info[cnt].data->d_size
1285 : / elsize, sizeof (Elf32_Word));
1286 :
1287 48 : bool last_was_local = true;
1288 : size_t destidx;
1289 : size_t inner;
1290 12802 : for (destidx = inner = 1;
1291 12754 : inner < shdr_info[cnt].data->d_size / elsize;
1292 12706 : ++inner)
1293 : {
1294 : Elf32_Word sec;
1295 : GElf_Sym sym_mem;
1296 : Elf32_Word xshndx;
1297 12706 : GElf_Sym *sym = gelf_getsymshndx (shdr_info[cnt].data,
1298 : shndxdata, inner,
1299 : &sym_mem, &xshndx);
1300 12706 : if (sym == NULL)
1301 0 : INTERNAL_ERROR (fname);
1302 :
1303 12706 : if (sym->st_shndx == SHN_UNDEF
1304 11492 : || (sym->st_shndx >= shnum
1305 79 : && sym->st_shndx != SHN_XINDEX))
1306 : {
1307 : /* This is no section index, leave it alone
1308 : unless it is moved. */
1309 1293 : if (destidx != inner
1310 949 : && gelf_update_symshndx (shdr_info[cnt].data,
1311 : shndxdata,
1312 : destidx, sym,
1313 : xshndx) == 0)
1314 0 : INTERNAL_ERROR (fname);
1315 :
1316 1293 : shdr_info[cnt].newsymidx[inner] = destidx++;
1317 :
1318 1293 : if (last_was_local
1319 81 : && GELF_ST_BIND (sym->st_info) != STB_LOCAL)
1320 : {
1321 27 : last_was_local = false;
1322 27 : shdr_info[cnt].shdr.sh_info = destidx - 1;
1323 : }
1324 :
1325 1293 : continue;
1326 : }
1327 :
1328 : /* Get the full section index, if necessary from the
1329 : XINDEX table. */
1330 11413 : if (sym->st_shndx == SHN_XINDEX)
1331 0 : elf_assert (shndxdata != NULL
1332 : && shndxdata->d_buf != NULL);
1333 11413 : size_t sidx = (sym->st_shndx != SHN_XINDEX
1334 11413 : ? sym->st_shndx : xshndx);
1335 11413 : sec = shdr_info[sidx].idx;
1336 :
1337 11413 : if (sec != 0)
1338 : {
1339 : GElf_Section nshndx;
1340 : Elf32_Word nxshndx;
1341 :
1342 907 : if (sec < SHN_LORESERVE)
1343 : {
1344 907 : nshndx = sec;
1345 907 : nxshndx = 0;
1346 : }
1347 : else
1348 : {
1349 : nshndx = SHN_XINDEX;
1350 : nxshndx = sec;
1351 : }
1352 :
1353 907 : elf_assert (sec < SHN_LORESERVE || shndxdata != NULL);
1354 :
1355 907 : if ((inner != destidx || nshndx != sym->st_shndx
1356 666 : || (shndxdata != NULL && nxshndx != xshndx))
1357 482 : && (sym->st_shndx = nshndx,
1358 241 : gelf_update_symshndx (shdr_info[cnt].data,
1359 : shndxdata,
1360 : destidx, sym,
1361 : nxshndx) == 0))
1362 0 : INTERNAL_ERROR (fname);
1363 :
1364 907 : shdr_info[cnt].newsymidx[inner] = destidx++;
1365 :
1366 907 : if (last_was_local
1367 756 : && GELF_ST_BIND (sym->st_info) != STB_LOCAL)
1368 : {
1369 21 : last_was_local = false;
1370 21 : shdr_info[cnt].shdr.sh_info = destidx - 1;
1371 : }
1372 : }
1373 10506 : else if ((shdr_info[cnt].shdr.sh_flags & SHF_ALLOC) != 0
1374 32 : && GELF_ST_TYPE (sym->st_info) != STT_SECTION
1375 0 : && shdr_info[sidx].shdr.sh_type != SHT_GROUP)
1376 : {
1377 : /* Removing a real symbol from an allocated
1378 : symbol table is hard and probably a
1379 : mistake. Really removing it means
1380 : rewriting the dynamic segment and hash
1381 : sections. Just warn and set the symbol
1382 : section to UNDEF. */
1383 0 : error (0, 0,
1384 0 : gettext ("Cannot remove symbol [%zd] from allocated symbol table [%zd]"), inner, cnt);
1385 0 : sym->st_shndx = SHN_UNDEF;
1386 0 : if (gelf_update_sym (shdr_info[cnt].data, destidx,
1387 : sym) == 0)
1388 0 : INTERNAL_ERROR (fname);
1389 0 : shdr_info[cnt].newsymidx[inner] = destidx++;
1390 : }
1391 10506 : else if (debug_fname != NULL
1392 10446 : && shdr_info[cnt].debug_data == NULL)
1393 : /* The symbol points to a section that is discarded
1394 : but isn't preserved in the debug file. Check that
1395 : this is a section or group signature symbol
1396 : for a section which has been removed. */
1397 : {
1398 8 : elf_assert (GELF_ST_TYPE (sym->st_info) == STT_SECTION
1399 : || ((shdr_info[sidx].shdr.sh_type
1400 : == SHT_GROUP)
1401 : && (shdr_info[sidx].shdr.sh_info
1402 : == inner)));
1403 : }
1404 : }
1405 :
1406 48 : if (destidx != inner)
1407 : {
1408 : /* The size of the symbol table changed. */
1409 30 : shdr_info[cnt].shdr.sh_size = newdata->d_size
1410 30 : = destidx * elsize;
1411 30 : any_symtab_changes = true;
1412 : }
1413 : else
1414 : {
1415 : /* The symbol table didn't really change. */
1416 18 : free (shdr_info[cnt].newsymidx);
1417 18 : shdr_info[cnt].newsymidx = NULL;
1418 : }
1419 : }
1420 : }
1421 :
1422 : /* If we have to, compute the offset of the section. */
1423 1018 : if (shdr_info[cnt].shdr.sh_offset == 0)
1424 : shdr_info[cnt].shdr.sh_offset
1425 1002 : = ((lastoffset + shdr_info[cnt].shdr.sh_addralign - 1)
1426 501 : & ~((GElf_Off) (shdr_info[cnt].shdr.sh_addralign - 1)));
1427 :
1428 : /* Set the section header in the new file. */
1429 1018 : if (unlikely (gelf_update_shdr (scn, &shdr_info[cnt].shdr) == 0))
1430 : /* There cannot be any overflows. */
1431 0 : INTERNAL_ERROR (fname);
1432 :
1433 : /* Remember the last section written so far. */
1434 2036 : GElf_Off filesz = (shdr_info[cnt].shdr.sh_type != SHT_NOBITS
1435 1018 : ? shdr_info[cnt].shdr.sh_size : 0);
1436 1018 : if (lastoffset < shdr_info[cnt].shdr.sh_offset + filesz)
1437 967 : lastoffset = shdr_info[cnt].shdr.sh_offset + filesz;
1438 : }
1439 :
1440 : /* Adjust symbol references if symbol tables changed. */
1441 48 : if (any_symtab_changes)
1442 : /* Find all relocation sections which use this symbol table. */
1443 978 : for (cnt = 1; cnt <= shdridx; ++cnt)
1444 : {
1445 : /* Update section headers when the data size has changed.
1446 : We also update the SHT_NOBITS section in the debug
1447 : file so that the section headers match in sh_size. */
1448 8 : inline void update_section_size (const Elf_Data *newdata)
1449 : {
1450 : GElf_Shdr shdr_mem;
1451 8 : GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
1452 8 : shdr->sh_size = newdata->d_size;
1453 8 : (void) gelf_update_shdr (scn, shdr);
1454 8 : if (debugelf != NULL)
1455 : {
1456 : /* libelf will use d_size to set sh_size. */
1457 2 : Elf_Data *debugdata = elf_getdata (elf_getscn (debugelf,
1458 : cnt), NULL);
1459 2 : if (debugdata == NULL)
1460 0 : INTERNAL_ERROR (fname);
1461 2 : debugdata->d_size = newdata->d_size;
1462 : }
1463 8 : }
1464 :
1465 948 : if (shdr_info[cnt].idx == 0 && debug_fname == NULL)
1466 : /* Ignore sections which are discarded. When we are saving a
1467 : relocation section in a separate debug file, we must fix up
1468 : the symbol table references. */
1469 89 : continue;
1470 :
1471 859 : const Elf32_Word symtabidx = shdr_info[cnt].old_sh_link;
1472 859 : elf_assert (symtabidx < shnum + 2);
1473 859 : const Elf32_Word *const newsymidx = shdr_info[symtabidx].newsymidx;
1474 859 : switch (shdr_info[cnt].shdr.sh_type)
1475 : {
1476 : inline bool no_symtab_updates (void)
1477 : {
1478 : /* If the symbol table hasn't changed, do not do anything. */
1479 233 : if (shdr_info[symtabidx].newsymidx == NULL)
1480 : return true;
1481 :
1482 : /* If the symbol table is not discarded, but additionally
1483 : duplicated in the separate debug file and this section
1484 : is discarded, don't adjust anything. */
1485 : return (shdr_info[cnt].idx == 0
1486 233 : && shdr_info[symtabidx].debug_data != NULL);
1487 : }
1488 :
1489 : case SHT_REL:
1490 : case SHT_RELA:
1491 222 : if (no_symtab_updates ())
1492 : break;
1493 :
1494 224 : Elf_Data *d = elf_getdata (shdr_info[cnt].idx == 0
1495 : ? elf_getscn (debugelf, cnt)
1496 112 : : elf_getscn (newelf,
1497 : shdr_info[cnt].idx),
1498 : NULL);
1499 112 : elf_assert (d != NULL && d->d_buf != NULL
1500 : && shdr_info[cnt].shdr.sh_entsize != 0);
1501 112 : size_t nrels = (shdr_info[cnt].shdr.sh_size
1502 : / shdr_info[cnt].shdr.sh_entsize);
1503 :
1504 112 : size_t symsize = gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT);
1505 224 : const Elf32_Word symidxn = (shdr_info[symtabidx].data->d_size
1506 112 : / symsize);
1507 112 : if (shdr_info[cnt].shdr.sh_type == SHT_REL)
1508 1608 : for (size_t relidx = 0; relidx < nrels; ++relidx)
1509 : {
1510 : GElf_Rel rel_mem;
1511 1608 : if (gelf_getrel (d, relidx, &rel_mem) == NULL)
1512 0 : INTERNAL_ERROR (fname);
1513 :
1514 1608 : size_t symidx = GELF_R_SYM (rel_mem.r_info);
1515 1608 : elf_assert (symidx < symidxn);
1516 1608 : if (newsymidx[symidx] != symidx)
1517 : {
1518 : rel_mem.r_info
1519 1472 : = GELF_R_INFO (newsymidx[symidx],
1520 : GELF_R_TYPE (rel_mem.r_info));
1521 :
1522 1472 : if (gelf_update_rel (d, relidx, &rel_mem) == 0)
1523 0 : INTERNAL_ERROR (fname);
1524 : }
1525 : }
1526 : else
1527 10185 : for (size_t relidx = 0; relidx < nrels; ++relidx)
1528 : {
1529 : GElf_Rela rel_mem;
1530 10185 : if (gelf_getrela (d, relidx, &rel_mem) == NULL)
1531 0 : INTERNAL_ERROR (fname);
1532 :
1533 10185 : size_t symidx = GELF_R_SYM (rel_mem.r_info);
1534 10185 : elf_assert (symidx < symidxn);
1535 10185 : if (newsymidx[symidx] != symidx)
1536 : {
1537 : rel_mem.r_info
1538 2449 : = GELF_R_INFO (newsymidx[symidx],
1539 : GELF_R_TYPE (rel_mem.r_info));
1540 :
1541 2449 : if (gelf_update_rela (d, relidx, &rel_mem) == 0)
1542 0 : INTERNAL_ERROR (fname);
1543 : }
1544 : }
1545 : break;
1546 :
1547 : case SHT_HASH:
1548 4 : if (no_symtab_updates ())
1549 : break;
1550 :
1551 : /* We have to recompute the hash table. */
1552 :
1553 4 : elf_assert (shdr_info[cnt].idx > 0);
1554 :
1555 : /* The hash section in the new file. */
1556 4 : scn = elf_getscn (newelf, shdr_info[cnt].idx);
1557 :
1558 : /* The symbol table data. */
1559 4 : Elf_Data *symd = elf_getdata (elf_getscn (newelf,
1560 4 : shdr_info[symtabidx].idx),
1561 : NULL);
1562 4 : elf_assert (symd != NULL && symd->d_buf != NULL);
1563 :
1564 : /* The hash table data. */
1565 4 : Elf_Data *hashd = elf_getdata (scn, NULL);
1566 4 : elf_assert (hashd != NULL && hashd->d_buf != NULL);
1567 :
1568 4 : if (shdr_info[cnt].shdr.sh_entsize == sizeof (Elf32_Word))
1569 : {
1570 : /* Sane arches first. */
1571 4 : elf_assert (hashd->d_size >= 2 * sizeof (Elf32_Word));
1572 4 : Elf32_Word *bucket = (Elf32_Word *) hashd->d_buf;
1573 :
1574 4 : size_t strshndx = shdr_info[symtabidx].old_sh_link;
1575 4 : size_t elsize = gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT);
1576 :
1577 4 : Elf32_Word nchain = bucket[1];
1578 4 : Elf32_Word nbucket = bucket[0];
1579 8 : uint64_t used_buf = ((2ULL + nchain + nbucket)
1580 4 : * sizeof (Elf32_Word));
1581 4 : elf_assert (used_buf <= hashd->d_size);
1582 :
1583 : /* Adjust the nchain value. The symbol table size
1584 : changed. We keep the same size for the bucket array. */
1585 4 : bucket[1] = symd->d_size / elsize;
1586 4 : bucket += 2;
1587 4 : Elf32_Word *chain = bucket + nbucket;
1588 :
1589 : /* New size of the section. */
1590 8 : size_t n_size = ((2 + symd->d_size / elsize + nbucket)
1591 4 : * sizeof (Elf32_Word));
1592 4 : elf_assert (n_size <= hashd->d_size);
1593 4 : hashd->d_size = n_size;
1594 4 : update_section_size (hashd);
1595 :
1596 : /* Clear the arrays. */
1597 8 : memset (bucket, '\0',
1598 4 : (symd->d_size / elsize + nbucket)
1599 : * sizeof (Elf32_Word));
1600 :
1601 56 : for (size_t inner = shdr_info[symtabidx].shdr.sh_info;
1602 48 : inner < symd->d_size / elsize; ++inner)
1603 : {
1604 : GElf_Sym sym_mem;
1605 48 : GElf_Sym *sym = gelf_getsym (symd, inner, &sym_mem);
1606 48 : elf_assert (sym != NULL);
1607 :
1608 48 : const char *name = elf_strptr (elf, strshndx,
1609 48 : sym->st_name);
1610 48 : elf_assert (name != NULL && nbucket != 0);
1611 48 : size_t hidx = elf_hash (name) % nbucket;
1612 :
1613 48 : if (bucket[hidx] == 0)
1614 40 : bucket[hidx] = inner;
1615 : else
1616 : {
1617 8 : hidx = bucket[hidx];
1618 :
1619 16 : while (chain[hidx] != 0 && chain[hidx] < nchain)
1620 0 : hidx = chain[hidx];
1621 :
1622 8 : chain[hidx] = inner;
1623 : }
1624 : }
1625 : }
1626 : else
1627 : {
1628 : /* Alpha and S390 64-bit use 64-bit SHT_HASH entries. */
1629 0 : elf_assert (shdr_info[cnt].shdr.sh_entsize
1630 : == sizeof (Elf64_Xword));
1631 :
1632 0 : Elf64_Xword *bucket = (Elf64_Xword *) hashd->d_buf;
1633 :
1634 0 : size_t strshndx = shdr_info[symtabidx].old_sh_link;
1635 0 : size_t elsize = gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT);
1636 :
1637 0 : elf_assert (symd->d_size >= 2 * sizeof (Elf64_Xword));
1638 0 : Elf64_Xword nbucket = bucket[0];
1639 0 : Elf64_Xword nchain = bucket[1];
1640 0 : uint64_t maxwords = hashd->d_size / sizeof (Elf64_Xword);
1641 0 : elf_assert (maxwords >= 2
1642 : && maxwords - 2 >= nbucket
1643 : && maxwords - 2 - nbucket >= nchain);
1644 :
1645 : /* Adjust the nchain value. The symbol table size
1646 : changed. We keep the same size for the bucket array. */
1647 0 : bucket[1] = symd->d_size / elsize;
1648 0 : bucket += 2;
1649 0 : Elf64_Xword *chain = bucket + nbucket;
1650 :
1651 : /* New size of the section. */
1652 0 : size_t n_size = ((2 + symd->d_size / elsize + nbucket)
1653 0 : * sizeof (Elf64_Xword));
1654 0 : elf_assert (n_size <= hashd->d_size);
1655 0 : hashd->d_size = n_size;
1656 0 : update_section_size (hashd);
1657 :
1658 : /* Clear the arrays. */
1659 0 : memset (bucket, '\0',
1660 0 : (symd->d_size / elsize + nbucket)
1661 : * sizeof (Elf64_Xword));
1662 :
1663 0 : for (size_t inner = shdr_info[symtabidx].shdr.sh_info;
1664 0 : inner < symd->d_size / elsize; ++inner)
1665 : {
1666 : GElf_Sym sym_mem;
1667 0 : GElf_Sym *sym = gelf_getsym (symd, inner, &sym_mem);
1668 0 : elf_assert (sym != NULL);
1669 :
1670 0 : const char *name = elf_strptr (elf, strshndx,
1671 0 : sym->st_name);
1672 0 : elf_assert (name != NULL && nbucket != 0);
1673 0 : size_t hidx = elf_hash (name) % nbucket;
1674 :
1675 0 : if (bucket[hidx] == 0)
1676 0 : bucket[hidx] = inner;
1677 : else
1678 : {
1679 : hidx = bucket[hidx];
1680 :
1681 0 : while (chain[hidx] != 0 && chain[hidx] < nchain)
1682 : hidx = chain[hidx];
1683 :
1684 0 : chain[hidx] = inner;
1685 : }
1686 : }
1687 : }
1688 : break;
1689 :
1690 : case SHT_GNU_versym:
1691 : /* If the symbol table changed we have to adjust the entries. */
1692 4 : if (no_symtab_updates ())
1693 : break;
1694 :
1695 4 : elf_assert (shdr_info[cnt].idx > 0);
1696 :
1697 : /* The symbol version section in the new file. */
1698 4 : scn = elf_getscn (newelf, shdr_info[cnt].idx);
1699 :
1700 : /* The symbol table data. */
1701 4 : symd = elf_getdata (elf_getscn (newelf, shdr_info[symtabidx].idx),
1702 : NULL);
1703 4 : elf_assert (symd != NULL && symd->d_buf != NULL);
1704 4 : size_t symz = gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT);
1705 4 : const Elf32_Word syms = (shdr_info[symtabidx].data->d_size / symz);
1706 :
1707 : /* The version symbol data. */
1708 4 : Elf_Data *verd = elf_getdata (scn, NULL);
1709 4 : elf_assert (verd != NULL && verd->d_buf != NULL);
1710 :
1711 : /* The symbol version array. */
1712 4 : GElf_Half *verstab = (GElf_Half *) verd->d_buf;
1713 :
1714 : /* Walk through the list and */
1715 4 : size_t elsize = gelf_fsize (elf, verd->d_type, 1, EV_CURRENT);
1716 4 : Elf32_Word vers = verd->d_size / elsize;
1717 172 : for (size_t inner = 1; inner < vers && inner < syms; ++inner)
1718 168 : if (newsymidx[inner] != 0 && newsymidx[inner] < vers)
1719 : /* Overwriting the same array works since the
1720 : reordering can only move entries to lower indices
1721 : in the array. */
1722 136 : verstab[newsymidx[inner]] = verstab[inner];
1723 :
1724 : /* New size of the section. */
1725 4 : verd->d_size = gelf_fsize (newelf, verd->d_type,
1726 4 : symd->d_size
1727 4 : / gelf_fsize (elf, symd->d_type, 1,
1728 : EV_CURRENT),
1729 : EV_CURRENT);
1730 4 : update_section_size (verd);
1731 4 : break;
1732 :
1733 : case SHT_GROUP:
1734 3 : if (no_symtab_updates ())
1735 : break;
1736 :
1737 : /* Yes, the symbol table changed.
1738 : Update the section header of the section group. */
1739 2 : scn = elf_getscn (newelf, shdr_info[cnt].idx);
1740 : GElf_Shdr shdr_mem;
1741 2 : GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
1742 2 : elf_assert (shdr != NULL);
1743 :
1744 2 : size_t symsz = gelf_fsize (elf, ELF_T_SYM, 1, EV_CURRENT);
1745 4 : const Elf32_Word symn = (shdr_info[symtabidx].data->d_size
1746 2 : / symsz);
1747 2 : elf_assert (shdr->sh_info < symn);
1748 2 : shdr->sh_info = newsymidx[shdr->sh_info];
1749 :
1750 2 : (void) gelf_update_shdr (scn, shdr);
1751 2 : break;
1752 : }
1753 : }
1754 :
1755 : /* Remove any relocations between debug sections in ET_REL
1756 : for the debug file when requested. These relocations are always
1757 : zero based between the unallocated sections. */
1758 48 : if (debug_fname != NULL && reloc_debug && ehdr->e_type == ET_REL)
1759 : {
1760 9 : scn = NULL;
1761 9 : cnt = 0;
1762 294 : while ((scn = elf_nextscn (debugelf, scn)) != NULL)
1763 : {
1764 276 : cnt++;
1765 : /* We need the actual section and header from the debugelf
1766 : not just the cached original in shdr_info because we
1767 : might want to change the size. */
1768 : GElf_Shdr shdr_mem;
1769 276 : GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
1770 276 : if (shdr->sh_type == SHT_REL || shdr->sh_type == SHT_RELA)
1771 : {
1772 : /* Make sure that this relocation section points to a
1773 : section to relocate with contents, that isn't
1774 : allocated and that is a debug section. */
1775 44 : Elf_Scn *tscn = elf_getscn (debugelf, shdr->sh_info);
1776 : GElf_Shdr tshdr_mem;
1777 44 : GElf_Shdr *tshdr = gelf_getshdr (tscn, &tshdr_mem);
1778 44 : if (tshdr->sh_type == SHT_NOBITS
1779 44 : || tshdr->sh_size == 0
1780 44 : || (tshdr->sh_flags & SHF_ALLOC) != 0)
1781 0 : continue;
1782 :
1783 44 : const char *tname = elf_strptr (debugelf, shstrndx,
1784 44 : tshdr->sh_name);
1785 44 : if (! tname || ! ebl_debugscn_p (ebl, tname))
1786 0 : continue;
1787 :
1788 : /* OK, lets relocate all trivial cross debug section
1789 : relocations. */
1790 44 : Elf_Data *reldata = elf_getdata (scn, NULL);
1791 44 : if (reldata == NULL || reldata->d_buf == NULL)
1792 0 : INTERNAL_ERROR (fname);
1793 :
1794 : /* Make sure we adjust the uncompressed debug data
1795 : (and recompress if necessary at the end). */
1796 : GElf_Chdr tchdr;
1797 44 : int tcompress_type = 0;
1798 44 : if (gelf_getchdr (tscn, &tchdr) != NULL)
1799 : {
1800 5 : tcompress_type = tchdr.ch_type;
1801 5 : if (elf_compress (tscn, 0, 0) != 1)
1802 0 : INTERNAL_ERROR (fname);
1803 : }
1804 :
1805 44 : Elf_Data *tdata = elf_getdata (tscn, NULL);
1806 44 : if (tdata == NULL || tdata->d_buf == NULL
1807 44 : || tdata->d_type != ELF_T_BYTE)
1808 0 : INTERNAL_ERROR (fname);
1809 :
1810 : /* Pick up the symbol table and shndx table to
1811 : resolve relocation symbol indexes. */
1812 44 : Elf64_Word symt = shdr->sh_link;
1813 : Elf_Data *symdata, *xndxdata;
1814 44 : elf_assert (symt < shnum + 2);
1815 44 : elf_assert (shdr_info[symt].symtab_idx < shnum + 2);
1816 88 : symdata = (shdr_info[symt].debug_data
1817 44 : ?: shdr_info[symt].data);
1818 88 : xndxdata = (shdr_info[shdr_info[symt].symtab_idx].debug_data
1819 44 : ?: shdr_info[shdr_info[symt].symtab_idx].data);
1820 :
1821 : /* Apply one relocation. Returns true when trivial
1822 : relocation actually done. */
1823 31007 : bool relocate (GElf_Addr offset, const GElf_Sxword addend,
1824 : bool is_rela, int rtype, int symndx)
1825 : {
1826 : /* R_*_NONE relocs can always just be removed. */
1827 31007 : if (rtype == 0)
1828 : return true;
1829 :
1830 : /* We only do simple absolute relocations. */
1831 31007 : Elf_Type type = ebl_reloc_simple_type (ebl, rtype);
1832 31007 : if (type == ELF_T_NUM)
1833 : return false;
1834 :
1835 : /* These are the types we can relocate. */
1836 : #define TYPES DO_TYPE (BYTE, Byte); DO_TYPE (HALF, Half); \
1837 : DO_TYPE (WORD, Word); DO_TYPE (SWORD, Sword); \
1838 : DO_TYPE (XWORD, Xword); DO_TYPE (SXWORD, Sxword)
1839 :
1840 : /* And only for relocations against other debug sections. */
1841 : GElf_Sym sym_mem;
1842 : Elf32_Word xndx;
1843 31007 : GElf_Sym *sym = gelf_getsymshndx (symdata, xndxdata,
1844 : symndx, &sym_mem,
1845 : &xndx);
1846 62014 : Elf32_Word sec = (sym->st_shndx == SHN_XINDEX
1847 31007 : ? xndx : sym->st_shndx);
1848 31007 : if (sec >= shnum + 2)
1849 0 : INTERNAL_ERROR (fname);
1850 :
1851 31007 : if (ebl_debugscn_p (ebl, shdr_info[sec].name))
1852 : {
1853 : size_t size;
1854 :
1855 : #define DO_TYPE(NAME, Name) GElf_##Name Name;
1856 : union { TYPES; } tmpbuf;
1857 : #undef DO_TYPE
1858 :
1859 21792 : switch (type)
1860 : {
1861 : #define DO_TYPE(NAME, Name) \
1862 : case ELF_T_##NAME: \
1863 : size = sizeof (GElf_##Name); \
1864 : tmpbuf.Name = 0; \
1865 : break;
1866 0 : TYPES;
1867 : #undef DO_TYPE
1868 : default:
1869 : return false;
1870 : }
1871 :
1872 21792 : if (offset > tdata->d_size
1873 21792 : || tdata->d_size - offset < size)
1874 : {
1875 0 : cleanup_debug ();
1876 0 : error (EXIT_FAILURE, 0, gettext ("bad relocation"));
1877 : }
1878 :
1879 : /* When the symbol value is zero then for SHT_REL
1880 : sections this is all that needs to be checked.
1881 : The addend is contained in the original data at
1882 : the offset already. So if the (section) symbol
1883 : address is zero and the given addend is zero
1884 : just remove the relocation, it isn't needed
1885 : anymore. */
1886 21792 : if (addend == 0 && sym->st_value == 0)
1887 : return true;
1888 :
1889 18550 : Elf_Data tmpdata =
1890 : {
1891 : .d_type = type,
1892 : .d_buf = &tmpbuf,
1893 : .d_size = size,
1894 : .d_version = EV_CURRENT,
1895 : };
1896 37100 : Elf_Data rdata =
1897 : {
1898 : .d_type = type,
1899 18550 : .d_buf = tdata->d_buf + offset,
1900 : .d_size = size,
1901 : .d_version = EV_CURRENT,
1902 : };
1903 :
1904 18550 : GElf_Addr value = sym->st_value;
1905 18550 : if (is_rela)
1906 : {
1907 : /* For SHT_RELA sections we just take the
1908 : given addend and add it to the value. */
1909 18550 : value += addend;
1910 : }
1911 : else
1912 : {
1913 : /* For SHT_REL sections we have to peek at
1914 : what is already in the section at the given
1915 : offset to get the addend. */
1916 0 : Elf_Data *d = gelf_xlatetom (debugelf, &tmpdata,
1917 : &rdata,
1918 0 : ehdr->e_ident[EI_DATA]);
1919 0 : if (d == NULL)
1920 0 : INTERNAL_ERROR (fname);
1921 0 : assert (d == &tmpdata);
1922 : }
1923 :
1924 18550 : switch (type)
1925 : {
1926 : #define DO_TYPE(NAME, Name) \
1927 : case ELF_T_##NAME: \
1928 : tmpbuf.Name += (GElf_##Name) value; \
1929 : break;
1930 0 : TYPES;
1931 : #undef DO_TYPE
1932 : default:
1933 0 : abort ();
1934 : }
1935 :
1936 : /* Now finally put in the new value. */
1937 18550 : Elf_Data *s = gelf_xlatetof (debugelf, &rdata,
1938 : &tmpdata,
1939 18550 : ehdr->e_ident[EI_DATA]);
1940 18550 : if (s == NULL)
1941 0 : INTERNAL_ERROR (fname);
1942 18550 : assert (s == &rdata);
1943 :
1944 : return true;
1945 : }
1946 : return false;
1947 : }
1948 :
1949 44 : if (shdr->sh_entsize == 0)
1950 0 : INTERNAL_ERROR (fname);
1951 :
1952 44 : size_t nrels = shdr->sh_size / shdr->sh_entsize;
1953 44 : size_t next = 0;
1954 44 : if (shdr->sh_type == SHT_REL)
1955 3212 : for (size_t relidx = 0; relidx < nrels; ++relidx)
1956 : {
1957 : GElf_Rel rel_mem;
1958 3212 : GElf_Rel *r = gelf_getrel (reldata, relidx, &rel_mem);
1959 3212 : if (! relocate (r->r_offset, 0, false,
1960 : GELF_R_TYPE (r->r_info),
1961 3212 : GELF_R_SYM (r->r_info)))
1962 : {
1963 18 : if (relidx != next)
1964 16 : gelf_update_rel (reldata, next, r);
1965 18 : ++next;
1966 : }
1967 : }
1968 : else
1969 27795 : for (size_t relidx = 0; relidx < nrels; ++relidx)
1970 : {
1971 : GElf_Rela rela_mem;
1972 27795 : GElf_Rela *r = gelf_getrela (reldata, relidx, &rela_mem);
1973 27795 : if (! relocate (r->r_offset, r->r_addend, true,
1974 : GELF_R_TYPE (r->r_info),
1975 27795 : GELF_R_SYM (r->r_info)))
1976 : {
1977 9197 : if (relidx != next)
1978 5177 : gelf_update_rela (reldata, next, r);
1979 9197 : ++next;
1980 : }
1981 : }
1982 :
1983 44 : nrels = next;
1984 44 : shdr->sh_size = reldata->d_size = nrels * shdr->sh_entsize;
1985 44 : gelf_update_shdr (scn, shdr);
1986 :
1987 44 : if (tcompress_type != 0)
1988 5 : if (elf_compress (tscn, tcompress_type, ELF_CHF_FORCE) != 1)
1989 0 : INTERNAL_ERROR (fname);
1990 : }
1991 : }
1992 : }
1993 :
1994 : /* Now that we have done all adjustments to the data,
1995 : we can actually write out the debug file. */
1996 48 : if (debug_fname != NULL)
1997 : {
1998 : /* Finally write the file. */
1999 30 : if (unlikely (elf_update (debugelf, ELF_C_WRITE) == -1))
2000 : {
2001 0 : error (0, 0, gettext ("while writing '%s': %s"),
2002 : tmp_debug_fname, elf_errmsg (-1));
2003 0 : result = 1;
2004 0 : goto fail_close;
2005 : }
2006 :
2007 : /* Create the real output file. First rename, then change the
2008 : mode. */
2009 30 : if (rename (tmp_debug_fname, debug_fname) != 0
2010 30 : || fchmod (debug_fd, mode) != 0)
2011 : {
2012 0 : error (0, errno, gettext ("while creating '%s'"), debug_fname);
2013 0 : result = 1;
2014 0 : goto fail_close;
2015 : }
2016 :
2017 : /* The temporary file does not exist anymore. */
2018 30 : free (tmp_debug_fname);
2019 30 : tmp_debug_fname = NULL;
2020 :
2021 30 : if (!remove_shdrs)
2022 : {
2023 : uint32_t debug_crc;
2024 30 : Elf_Data debug_crc_data =
2025 : {
2026 : .d_type = ELF_T_WORD,
2027 : .d_buf = &debug_crc,
2028 : .d_size = sizeof (debug_crc),
2029 : .d_version = EV_CURRENT
2030 : };
2031 :
2032 : /* Compute the checksum which we will add to the executable. */
2033 30 : if (crc32_file (debug_fd, &debug_crc) != 0)
2034 : {
2035 0 : error (0, errno, gettext ("\
2036 : while computing checksum for debug information"));
2037 0 : unlink (debug_fname);
2038 0 : result = 1;
2039 0 : goto fail_close;
2040 : }
2041 :
2042 : /* Store it in the debuglink section data. */
2043 30 : if (unlikely (gelf_xlatetof (newelf, &debuglink_crc_data,
2044 : &debug_crc_data, ehdr->e_ident[EI_DATA])
2045 : != &debuglink_crc_data))
2046 0 : INTERNAL_ERROR (fname);
2047 : }
2048 : }
2049 :
2050 : /* Finally finish the ELF header. Fill in the fields not handled by
2051 : libelf from the old file. */
2052 48 : newehdr = gelf_getehdr (newelf, &newehdr_mem);
2053 48 : if (newehdr == NULL)
2054 0 : INTERNAL_ERROR (fname);
2055 :
2056 96 : memcpy (newehdr->e_ident, ehdr->e_ident, EI_NIDENT);
2057 48 : newehdr->e_type = ehdr->e_type;
2058 48 : newehdr->e_machine = ehdr->e_machine;
2059 48 : newehdr->e_version = ehdr->e_version;
2060 48 : newehdr->e_entry = ehdr->e_entry;
2061 48 : newehdr->e_flags = ehdr->e_flags;
2062 48 : newehdr->e_phoff = ehdr->e_phoff;
2063 :
2064 : /* We need to position the section header table. */
2065 48 : const size_t offsize = gelf_fsize (elf, ELF_T_OFF, 1, EV_CURRENT);
2066 96 : newehdr->e_shoff = ((shdr_info[shdridx].shdr.sh_offset
2067 48 : + shdr_info[shdridx].shdr.sh_size + offsize - 1)
2068 48 : & ~((GElf_Off) (offsize - 1)));
2069 48 : newehdr->e_shentsize = gelf_fsize (elf, ELF_T_SHDR, 1, EV_CURRENT);
2070 :
2071 : /* The new section header string table index. */
2072 48 : if (likely (idx < SHN_HIRESERVE) && likely (idx != SHN_XINDEX))
2073 48 : newehdr->e_shstrndx = idx;
2074 : else
2075 : {
2076 : /* The index does not fit in the ELF header field. */
2077 0 : shdr_info[0].scn = elf_getscn (elf, 0);
2078 :
2079 0 : if (gelf_getshdr (shdr_info[0].scn, &shdr_info[0].shdr) == NULL)
2080 0 : INTERNAL_ERROR (fname);
2081 :
2082 0 : shdr_info[0].shdr.sh_link = idx;
2083 0 : (void) gelf_update_shdr (shdr_info[0].scn, &shdr_info[0].shdr);
2084 :
2085 0 : newehdr->e_shstrndx = SHN_XINDEX;
2086 : }
2087 :
2088 48 : if (gelf_update_ehdr (newelf, newehdr) == 0)
2089 : {
2090 0 : error (0, 0, gettext ("%s: error while creating ELF header: %s"),
2091 0 : output_fname ?: fname, elf_errmsg (-1));
2092 0 : cleanup_debug ();
2093 0 : return 1;
2094 : }
2095 :
2096 : /* We have everything from the old file. */
2097 48 : if (elf_cntl (elf, ELF_C_FDDONE) != 0)
2098 : {
2099 0 : error (0, 0, gettext ("%s: error while reading the file: %s"),
2100 : fname, elf_errmsg (-1));
2101 0 : cleanup_debug ();
2102 0 : return 1;
2103 : }
2104 :
2105 : /* The ELF library better follows our layout when this is not a
2106 : relocatable object file. */
2107 48 : elf_flagelf (newelf, ELF_C_SET,
2108 48 : (ehdr->e_type != ET_REL ? ELF_F_LAYOUT : 0)
2109 48 : | (permissive ? ELF_F_PERMISSIVE : 0));
2110 :
2111 : /* Finally write the file. */
2112 48 : if (elf_update (newelf, ELF_C_WRITE) == -1)
2113 : {
2114 0 : error (0, 0, gettext ("while writing '%s': %s"),
2115 0 : output_fname ?: fname, elf_errmsg (-1));
2116 0 : result = 1;
2117 : }
2118 :
2119 48 : if (remove_shdrs)
2120 : {
2121 : /* libelf can't cope without the section headers being properly intact.
2122 : So we just let it write them normally, and then we nuke them later. */
2123 :
2124 0 : if (newehdr->e_ident[EI_CLASS] == ELFCLASS32)
2125 : {
2126 : assert (offsetof (Elf32_Ehdr, e_shentsize) + sizeof (Elf32_Half)
2127 : == offsetof (Elf32_Ehdr, e_shnum));
2128 : assert (offsetof (Elf32_Ehdr, e_shnum) + sizeof (Elf32_Half)
2129 : == offsetof (Elf32_Ehdr, e_shstrndx));
2130 0 : const Elf32_Off zero_off = 0;
2131 0 : const Elf32_Half zero[3] = { 0, 0, SHN_UNDEF };
2132 0 : if (pwrite_retry (fd, &zero_off, sizeof zero_off,
2133 : offsetof (Elf32_Ehdr, e_shoff)) != sizeof zero_off
2134 0 : || (pwrite_retry (fd, zero, sizeof zero,
2135 : offsetof (Elf32_Ehdr, e_shentsize))
2136 : != sizeof zero)
2137 0 : || ftruncate (fd, shdr_info[shdridx].shdr.sh_offset) < 0)
2138 : {
2139 0 : error (0, errno, gettext ("while writing '%s'"),
2140 0 : output_fname ?: fname);
2141 0 : result = 1;
2142 : }
2143 : }
2144 : else
2145 : {
2146 : assert (offsetof (Elf64_Ehdr, e_shentsize) + sizeof (Elf64_Half)
2147 : == offsetof (Elf64_Ehdr, e_shnum));
2148 : assert (offsetof (Elf64_Ehdr, e_shnum) + sizeof (Elf64_Half)
2149 : == offsetof (Elf64_Ehdr, e_shstrndx));
2150 0 : const Elf64_Off zero_off = 0;
2151 0 : const Elf64_Half zero[3] = { 0, 0, SHN_UNDEF };
2152 0 : if (pwrite_retry (fd, &zero_off, sizeof zero_off,
2153 : offsetof (Elf64_Ehdr, e_shoff)) != sizeof zero_off
2154 0 : || (pwrite_retry (fd, zero, sizeof zero,
2155 : offsetof (Elf64_Ehdr, e_shentsize))
2156 : != sizeof zero)
2157 0 : || ftruncate (fd, shdr_info[shdridx].shdr.sh_offset) < 0)
2158 : {
2159 0 : error (0, errno, gettext ("while writing '%s'"),
2160 0 : output_fname ?: fname);
2161 0 : result = 1;
2162 : }
2163 : }
2164 : }
2165 :
2166 : fail_close:
2167 48 : if (shdr_info != NULL)
2168 : {
2169 : /* For some sections we might have created an table to map symbol
2170 : table indices. */
2171 48 : if (any_symtab_changes)
2172 978 : for (cnt = 1; cnt <= shdridx; ++cnt)
2173 : {
2174 948 : free (shdr_info[cnt].newsymidx);
2175 948 : if (shdr_info[cnt].debug_data != NULL)
2176 47 : free (shdr_info[cnt].debug_data->d_buf);
2177 : }
2178 :
2179 : /* Free data we allocated for the .gnu_debuglink section. */
2180 48 : free (debuglink_buf);
2181 :
2182 : /* Free the memory. */
2183 48 : if ((shnum + 2) * sizeof (struct shdr_info) > MAX_STACK_ALLOC)
2184 0 : free (shdr_info);
2185 : }
2186 :
2187 : /* Free other resources. */
2188 48 : if (shstrtab_data != NULL)
2189 48 : free (shstrtab_data->d_buf);
2190 48 : if (shst != NULL)
2191 48 : dwelf_strtab_free (shst);
2192 :
2193 : /* That was it. Close the descriptors. */
2194 48 : if (elf_end (newelf) != 0)
2195 : {
2196 0 : error (0, 0, gettext ("error while finishing '%s': %s"),
2197 0 : output_fname ?: fname, elf_errmsg (-1));
2198 0 : result = 1;
2199 : }
2200 :
2201 48 : if (debugelf != NULL && elf_end (debugelf) != 0)
2202 : {
2203 0 : error (0, 0, gettext ("error while finishing '%s': %s"), debug_fname,
2204 : elf_errmsg (-1));
2205 0 : result = 1;
2206 : }
2207 :
2208 : fail:
2209 : /* Close the EBL backend. */
2210 48 : if (ebl != NULL)
2211 10 : ebl_closebackend (ebl);
2212 :
2213 48 : cleanup_debug ();
2214 :
2215 : /* If requested, preserve the timestamp. */
2216 48 : if (tvp != NULL)
2217 : {
2218 0 : if (futimens (fd, tvp) != 0)
2219 : {
2220 0 : error (0, errno, gettext ("\
2221 : cannot set access and modification date of '%s'"),
2222 0 : output_fname ?: fname);
2223 0 : result = 1;
2224 : }
2225 : }
2226 :
2227 : /* Close the file descriptor if we created a new file. */
2228 48 : if (output_fname != NULL)
2229 36 : close (fd);
2230 :
2231 : return result;
2232 : }
2233 :
2234 : static void
2235 48 : cleanup_debug (void)
2236 : {
2237 48 : if (debug_fd >= 0)
2238 : {
2239 30 : if (tmp_debug_fname != NULL)
2240 : {
2241 0 : unlink (tmp_debug_fname);
2242 0 : free (tmp_debug_fname);
2243 0 : tmp_debug_fname = NULL;
2244 : }
2245 30 : close (debug_fd);
2246 30 : debug_fd = -1;
2247 : }
2248 48 : }
2249 :
2250 : static int
2251 : handle_ar (int fd, Elf *elf, const char *prefix, const char *fname,
2252 : struct timespec tvp[2])
2253 : {
2254 : size_t prefix_len = prefix == NULL ? 0 : strlen (prefix);
2255 : size_t fname_len = strlen (fname) + 1;
2256 : char new_prefix[prefix_len + 1 + fname_len];
2257 : char *cp = new_prefix;
2258 :
2259 : /* Create the full name of the file. */
2260 : if (prefix != NULL)
2261 : {
2262 : cp = mempcpy (cp, prefix, prefix_len);
2263 : *cp++ = ':';
2264 : }
2265 : memcpy (cp, fname, fname_len);
2266 :
2267 :
2268 : /* Process all the files contained in the archive. */
2269 : Elf *subelf;
2270 : Elf_Cmd cmd = ELF_C_RDWR;
2271 : int result = 0;
2272 : while ((subelf = elf_begin (fd, cmd, elf)) != NULL)
2273 : {
2274 : /* The the header for this element. */
2275 : Elf_Arhdr *arhdr = elf_getarhdr (subelf);
2276 :
2277 : if (elf_kind (subelf) == ELF_K_ELF)
2278 : result |= handle_elf (fd, subelf, new_prefix, arhdr->ar_name, 0, NULL);
2279 : else if (elf_kind (subelf) == ELF_K_AR)
2280 : result |= handle_ar (fd, subelf, new_prefix, arhdr->ar_name, NULL);
2281 :
2282 : /* Get next archive element. */
2283 : cmd = elf_next (subelf);
2284 : if (unlikely (elf_end (subelf) != 0))
2285 : INTERNAL_ERROR (fname);
2286 : }
2287 :
2288 : if (tvp != NULL)
2289 : {
2290 : if (unlikely (futimens (fd, tvp) != 0))
2291 : {
2292 : error (0, errno, gettext ("\
2293 : cannot set access and modification date of '%s'"), fname);
2294 : result = 1;
2295 : }
2296 : }
2297 :
2298 : if (unlikely (close (fd) != 0))
2299 : error (EXIT_FAILURE, errno, gettext ("while closing '%s'"), fname);
2300 :
2301 : return result;
2302 : }
2303 :
2304 :
2305 : #include "debugpred.h"
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