1 /*
2 * Copyright (c) Christos Zoulas 2003.
3 * All Rights Reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice immediately at the beginning of the file, without modification,
10 * this list of conditions, and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
19 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27 #include "file.h"
28
29 #ifndef lint
30 FILE_RCSID("@(#)$File: readelf.c,v 1.206 2026/04/24 19:14:02 christos Exp $")
31 #endif
32
33 #ifdef BUILTIN_ELF
34 #include <string.h>
35 #include <ctype.h>
36 #include <stdlib.h>
37 #include <stdarg.h>
38 #ifdef HAVE_UNISTD_H
39 #include <unistd.h>
40 #endif
41
42 #include "readelf.h"
43 #include "magic.h"
44
45 #ifdef ELFCORE
46 file_private int dophn_core(struct magic_set *, int, int, int, off_t, int,
47 size_t, off_t, int *, uint16_t *);
48 #endif
49 file_private int dophn_exec(struct magic_set *, int, int, int, off_t, int,
50 size_t, off_t, int, int *, uint16_t *);
51 file_private int doshn(struct magic_set *, int, int, int, off_t, int, size_t,
52 off_t, int, int, int *, uint16_t *);
53 file_private size_t donote(struct magic_set *, void *, size_t, size_t, int,
54 int, size_t, int *, uint16_t *, int, off_t, int, off_t);
55
56 #define ELF_ALIGN(a) ((((a) + align - 1) / align) * align)
57
58 #define isquote(c) (strchr("'\"`", (c)) != NULL)
59
60 file_private uint16_t getu16(int, uint16_t);
61 file_private uint32_t getu32(int, uint32_t);
62 file_private uint64_t getu64(int, uint64_t);
63
64 #define NBUFSIZE 2024
65 #define SIZE_UNKNOWN CAST(off_t, -1)
66 #define NAMEEQUALS(n, v) \
67 (namesz == sizeof(v) && memcmp(n, v, namesz) == 0)
68
69 __attribute__((__format__(__printf__, 2, 3)))
70 file_private int
elf_printf(struct magic_set * ms,const char * fmt,...)71 elf_printf(struct magic_set *ms, const char *fmt, ...)
72 {
73 va_list ap;
74 int rv;
75
76 if (ms->flags & MAGIC_MIME)
77 return 1;
78
79 va_start(ap, fmt);
80 rv = file_vprintf(ms, fmt, ap);
81 va_end(ap);
82 return rv;
83 }
84 file_private int
toomany(struct magic_set * ms,const char * name,uint16_t num)85 toomany(struct magic_set *ms, const char *name, uint16_t num)
86 {
87 if (elf_printf(ms, ", too many %s (%u)", name, num) == -1)
88 return -1;
89 return 1;
90 }
91
92 file_private uint16_t
getu16(int swap,uint16_t value)93 getu16(int swap, uint16_t value)
94 {
95 union {
96 uint16_t ui;
97 char c[2];
98 } retval, tmpval;
99
100 if (swap) {
101 tmpval.ui = value;
102
103 retval.c[0] = tmpval.c[1];
104 retval.c[1] = tmpval.c[0];
105
106 return retval.ui;
107 } else
108 return value;
109 }
110
111 file_private uint32_t
getu32(int swap,uint32_t value)112 getu32(int swap, uint32_t value)
113 {
114 union {
115 uint32_t ui;
116 char c[4];
117 } retval, tmpval;
118
119 if (swap) {
120 tmpval.ui = value;
121
122 retval.c[0] = tmpval.c[3];
123 retval.c[1] = tmpval.c[2];
124 retval.c[2] = tmpval.c[1];
125 retval.c[3] = tmpval.c[0];
126
127 return retval.ui;
128 } else
129 return value;
130 }
131
132 file_private uint64_t
getu64(int swap,uint64_t value)133 getu64(int swap, uint64_t value)
134 {
135 union {
136 uint64_t ui;
137 char c[8];
138 } retval, tmpval;
139
140 if (swap) {
141 tmpval.ui = value;
142
143 retval.c[0] = tmpval.c[7];
144 retval.c[1] = tmpval.c[6];
145 retval.c[2] = tmpval.c[5];
146 retval.c[3] = tmpval.c[4];
147 retval.c[4] = tmpval.c[3];
148 retval.c[5] = tmpval.c[2];
149 retval.c[6] = tmpval.c[1];
150 retval.c[7] = tmpval.c[0];
151
152 return retval.ui;
153 } else
154 return value;
155 }
156
157 #define elf_getu16(swap, value) getu16(swap, value)
158 #define elf_getu32(swap, value) getu32(swap, value)
159 #define elf_getu64(swap, value) getu64(swap, value)
160
161 #define xsh_addr (clazz == ELFCLASS32 \
162 ? CAST(void *, &sh32) \
163 : CAST(void *, &sh64))
164 #define xsh_sizeof (clazz == ELFCLASS32 \
165 ? sizeof(sh32) \
166 : sizeof(sh64))
167 #define xsh_size CAST(size_t, (clazz == ELFCLASS32 \
168 ? elf_getu32(swap, sh32.sh_size) \
169 : elf_getu64(swap, sh64.sh_size)))
170 #define xsh_offset CAST(off_t, (clazz == ELFCLASS32 \
171 ? elf_getu32(swap, sh32.sh_offset) \
172 : elf_getu64(swap, sh64.sh_offset)))
173 #define xsh_type (clazz == ELFCLASS32 \
174 ? elf_getu32(swap, sh32.sh_type) \
175 : elf_getu32(swap, sh64.sh_type))
176 #define xsh_name (clazz == ELFCLASS32 \
177 ? elf_getu32(swap, sh32.sh_name) \
178 : elf_getu32(swap, sh64.sh_name))
179
180 #define xph_addr (clazz == ELFCLASS32 \
181 ? CAST(void *, &ph32) \
182 : CAST(void *, &ph64))
183 #define xph_sizeof (clazz == ELFCLASS32 \
184 ? sizeof(ph32) \
185 : sizeof(ph64))
186 #define xph_type (clazz == ELFCLASS32 \
187 ? elf_getu32(swap, ph32.p_type) \
188 : elf_getu32(swap, ph64.p_type))
189 #define xph_offset CAST(off_t, (clazz == ELFCLASS32 \
190 ? elf_getu32(swap, ph32.p_offset) \
191 : elf_getu64(swap, ph64.p_offset)))
192 #define xph_align CAST(size_t, (clazz == ELFCLASS32 \
193 ? CAST(off_t, (ph32.p_align ? \
194 elf_getu32(swap, ph32.p_align) : 4))\
195 : CAST(off_t, (ph64.p_align ? \
196 elf_getu64(swap, ph64.p_align) : 4))))
197 #define xph_vaddr CAST(size_t, (clazz == ELFCLASS32 \
198 ? CAST(off_t, (ph32.p_vaddr ? \
199 elf_getu32(swap, ph32.p_vaddr) : 4))\
200 : CAST(off_t, (ph64.p_vaddr ? \
201 elf_getu64(swap, ph64.p_vaddr) : 4))))
202 #define xph_filesz CAST(size_t, (clazz == ELFCLASS32 \
203 ? elf_getu32(swap, ph32.p_filesz) \
204 : elf_getu64(swap, ph64.p_filesz)))
205 #define xph_memsz CAST(size_t, ((clazz == ELFCLASS32 \
206 ? elf_getu32(swap, ph32.p_memsz) \
207 : elf_getu64(swap, ph64.p_memsz))))
208 #define xnh_addr (clazz == ELFCLASS32 \
209 ? CAST(void *, &nh32) \
210 : CAST(void *, &nh64))
211 #define xnh_sizeof (clazz == ELFCLASS32 \
212 ? sizeof(nh32) \
213 : sizeof(nh64))
214 #define xnh_type (clazz == ELFCLASS32 \
215 ? elf_getu32(swap, nh32.n_type) \
216 : elf_getu32(swap, nh64.n_type))
217 #define xnh_namesz (clazz == ELFCLASS32 \
218 ? elf_getu32(swap, nh32.n_namesz) \
219 : elf_getu32(swap, nh64.n_namesz))
220 #define xnh_descsz (clazz == ELFCLASS32 \
221 ? elf_getu32(swap, nh32.n_descsz) \
222 : elf_getu32(swap, nh64.n_descsz))
223
224 #define xdh_addr (clazz == ELFCLASS32 \
225 ? CAST(void *, &dh32) \
226 : CAST(void *, &dh64))
227 #define xdh_sizeof (clazz == ELFCLASS32 \
228 ? sizeof(dh32) \
229 : sizeof(dh64))
230 #define xdh_tag (clazz == ELFCLASS32 \
231 ? elf_getu32(swap, dh32.d_tag) \
232 : elf_getu64(swap, dh64.d_tag))
233 #define xdh_val (clazz == ELFCLASS32 \
234 ? elf_getu32(swap, dh32.d_un.d_val) \
235 : elf_getu64(swap, dh64.d_un.d_val))
236
237 #define xcap_addr (clazz == ELFCLASS32 \
238 ? CAST(void *, &cap32) \
239 : CAST(void *, &cap64))
240 #define xcap_sizeof (clazz == ELFCLASS32 \
241 ? sizeof(cap32) \
242 : sizeof(cap64))
243 #define xcap_tag (clazz == ELFCLASS32 \
244 ? elf_getu32(swap, cap32.c_tag) \
245 : elf_getu64(swap, cap64.c_tag))
246 #define xcap_val (clazz == ELFCLASS32 \
247 ? elf_getu32(swap, cap32.c_un.c_val) \
248 : elf_getu64(swap, cap64.c_un.c_val))
249
250 #define xauxv_addr (clazz == ELFCLASS32 \
251 ? CAST(void *, &auxv32) \
252 : CAST(void *, &auxv64))
253 #define xauxv_sizeof (clazz == ELFCLASS32 \
254 ? sizeof(auxv32) \
255 : sizeof(auxv64))
256 #define xauxv_type (clazz == ELFCLASS32 \
257 ? elf_getu32(swap, auxv32.a_type) \
258 : elf_getu64(swap, auxv64.a_type))
259 #define xauxv_val (clazz == ELFCLASS32 \
260 ? elf_getu32(swap, auxv32.a_v) \
261 : elf_getu64(swap, auxv64.a_v))
262
263 #define prpsoffsets(i) (clazz == ELFCLASS32 \
264 ? prpsoffsets32[i] \
265 : prpsoffsets64[i])
266
267 #ifdef ELFCORE
268 /*
269 * Try larger offsets first to avoid false matches
270 * from earlier data that happen to look like strings.
271 */
272 static const size_t prpsoffsets32[] = {
273 #ifdef USE_NT_PSINFO
274 104, /* SunOS 5.x (command line) */
275 88, /* SunOS 5.x (short name) */
276 #endif /* USE_NT_PSINFO */
277
278 100, /* SunOS 5.x (command line) */
279 84, /* SunOS 5.x (short name) */
280
281 44, /* Linux (command line) */
282 28, /* Linux (short name) */
283
284 48, /* Linux PowerPC (command line) */
285 32, /* Linux PowerPC (short name) */
286
287 8, /* FreeBSD */
288 };
289
290 static const size_t prpsoffsets64[] = {
291 #ifdef USE_NT_PSINFO
292 152, /* SunOS 5.x (command line) */
293 136, /* SunOS 5.x (short name) */
294 #endif /* USE_NT_PSINFO */
295
296 136, /* SunOS 5.x, 64-bit (command line) */
297 120, /* SunOS 5.x, 64-bit (short name) */
298
299 56, /* Linux (command line) */
300 40, /* Linux (tested on core from 2.4.x, short name) */
301
302 16, /* FreeBSD, 64-bit */
303 };
304
305 #define NOFFSETS32 __arraycount(prpsoffsets32)
306 #define NOFFSETS64 __arraycount(prpsoffsets64)
307
308 #define NOFFSETS (clazz == ELFCLASS32 ? NOFFSETS32 : NOFFSETS64)
309
310 /*
311 * Look through the program headers of an executable image, searching
312 * for a PT_NOTE section of type NT_PRPSINFO, with a name "CORE" or
313 * "FreeBSD"; if one is found, try looking in various places in its
314 * contents for a 16-character string containing only printable
315 * characters - if found, that string should be the name of the program
316 * that dropped core. Note: right after that 16-character string is,
317 * at least in SunOS 5.x (and possibly other SVR4-flavored systems) and
318 * Linux, a longer string (80 characters, in 5.x, probably other
319 * SVR4-flavored systems, and Linux) containing the start of the
320 * command line for that program.
321 *
322 * SunOS 5.x core files contain two PT_NOTE sections, with the types
323 * NT_PRPSINFO (old) and NT_PSINFO (new). These structs contain the
324 * same info about the command name and command line, so it probably
325 * isn't worthwhile to look for NT_PSINFO, but the offsets are provided
326 * above (see USE_NT_PSINFO), in case we ever decide to do so. The
327 * NT_PRPSINFO and NT_PSINFO sections are always in order and adjacent;
328 * the SunOS 5.x file command relies on this (and prefers the latter).
329 *
330 * The signal number probably appears in a section of type NT_PRSTATUS,
331 * but that's also rather OS-dependent, in ways that are harder to
332 * dissect with heuristics, so I'm not bothering with the signal number.
333 * (I suppose the signal number could be of interest in situations where
334 * you don't have the binary of the program that dropped core; if you
335 * *do* have that binary, the debugger will probably tell you what
336 * signal it was.)
337 */
338
339 #define OS_STYLE_SVR4 0
340 #define OS_STYLE_FREEBSD 1
341 #define OS_STYLE_NETBSD 2
342
343 file_private const char os_style_names[][8] = {
344 "SVR4",
345 "FreeBSD",
346 "NetBSD",
347 };
348
349 #define FLAGS_CORE_STYLE 0x0003
350
351 #define FLAGS_DID_CORE 0x0004
352 #define FLAGS_DID_OS_NOTE 0x0008
353 #define FLAGS_DID_BUILD_ID 0x0010
354 #define FLAGS_DID_CORE_STYLE 0x0020
355 #define FLAGS_DID_NETBSD_PAX 0x0040
356 #define FLAGS_DID_NETBSD_MARCH 0x0080
357 #define FLAGS_DID_NETBSD_CMODEL 0x0100
358 #define FLAGS_DID_NETBSD_EMULATION 0x0200
359 #define FLAGS_DID_NETBSD_UNKNOWN 0x0400
360 #define FLAGS_DID_ANDROID_MEMTAG 0x0800
361 #define FLAGS_IS_CORE 0x1000
362 #define FLAGS_DID_AUXV 0x2000
363
364 file_private int
dophn_core(struct magic_set * ms,int clazz,int swap,int fd,off_t off,int num,size_t size,off_t fsize,int * flags,uint16_t * notecount)365 dophn_core(struct magic_set *ms, int clazz, int swap, int fd, off_t off,
366 int num, size_t size, off_t fsize, int *flags, uint16_t *notecount)
367 {
368 Elf32_Phdr ph32;
369 Elf64_Phdr ph64;
370 size_t offset, len;
371 unsigned char nbuf[NBUFSIZE];
372 ssize_t bufsize;
373 off_t ph_off = off, offs;
374 int ph_num = num;
375
376 if (ms->flags & MAGIC_MIME)
377 return 0;
378
379 if (num == 0) {
380 if (elf_printf(ms, ", no program header") == -1)
381 return -1;
382 return 0;
383 }
384 if (size != xph_sizeof) {
385 if (elf_printf(ms, ", corrupted program header size") == -1)
386 return -1;
387 return 0;
388 }
389
390 /*
391 * Loop through all the program headers.
392 */
393 for ( ; num; num--) {
394 if (pread(fd, xph_addr, xph_sizeof, off) <
395 CAST(ssize_t, xph_sizeof)) {
396 if (elf_printf(ms,
397 ", can't read elf program headers at %jd",
398 (intmax_t)off) == -1)
399 return -1;
400 return 0;
401 }
402 off += size;
403
404 if (fsize != SIZE_UNKNOWN && xph_offset > fsize) {
405 /* Perhaps warn here */
406 continue;
407 }
408
409 if (xph_type != PT_NOTE)
410 continue;
411
412 /*
413 * This is a PT_NOTE section; loop through all the notes
414 * in the section.
415 */
416 len = xph_filesz < sizeof(nbuf) ? xph_filesz : sizeof(nbuf);
417 offs = xph_offset;
418 if ((bufsize = pread(fd, nbuf, len, offs)) == -1) {
419 if (elf_printf(ms, " can't read note section at %jd",
420 (intmax_t)offs) == -1)
421 return -1;
422 return 0;
423 }
424 offset = 0;
425 for (;;) {
426 if (offset >= CAST(size_t, bufsize))
427 break;
428 offset = donote(ms, nbuf, offset, CAST(size_t, bufsize),
429 clazz, swap, 4, flags, notecount, fd, ph_off,
430 ph_num, fsize);
431 if (offset == 0)
432 break;
433
434 }
435 }
436 return 0;
437 }
438 #endif
439
440 static int
do_note_netbsd_version(struct magic_set * ms,int swap,void * v)441 do_note_netbsd_version(struct magic_set *ms, int swap, void *v)
442 {
443 uint32_t desc;
444 memcpy(&desc, v, sizeof(desc));
445 desc = elf_getu32(swap, desc);
446
447 if (elf_printf(ms, ", for NetBSD") == -1)
448 return -1;
449 /*
450 * The version number used to be stuck as 199905, and was thus
451 * basically content-free. Newer versions of NetBSD have fixed
452 * this and now use the encoding of __NetBSD_Version__:
453 *
454 * MMmmrrpp00
455 *
456 * M = major version
457 * m = minor version
458 * r = release ["",A-Z,Z[A-Z] but numeric]
459 * p = patchlevel
460 */
461 if (desc > 100000000U) {
462 uint32_t ver_patch = (desc / 100) % 100;
463 uint32_t ver_rel = (desc / 10000) % 100;
464 uint32_t ver_min = (desc / 1000000) % 100;
465 uint32_t ver_maj = desc / 100000000;
466
467 if (elf_printf(ms, " %u.%u", ver_maj, ver_min) == -1)
468 return -1;
469 if (ver_maj >= 9) {
470 ver_patch += 100 * ver_rel;
471 ver_rel = 0;
472 }
473 if (ver_rel == 0 && ver_patch != 0) {
474 if (elf_printf(ms, ".%u", ver_patch) == -1)
475 return -1;
476 } else if (ver_rel != 0) {
477 while (ver_rel > 26) {
478 if (elf_printf(ms, "Z") == -1)
479 return -1;
480 ver_rel -= 26;
481 }
482 if (elf_printf(ms, "%c", 'A' + ver_rel - 1) == -1)
483 return -1;
484 }
485 }
486 return 0;
487 }
488
489 static int
do_note_freebsd_version(struct magic_set * ms,int swap,void * v)490 do_note_freebsd_version(struct magic_set *ms, int swap, void *v)
491 {
492 uint32_t desc;
493
494 memcpy(&desc, v, sizeof(desc));
495 desc = elf_getu32(swap, desc);
496 if (elf_printf(ms, ", for FreeBSD") == -1)
497 return -1;
498
499 /*
500 * Contents is __FreeBSD_version, whose relation to OS
501 * versions is defined by a huge table in the Porter's
502 * Handbook. This is the general scheme:
503 *
504 * Releases:
505 * Mmp000 (before 4.10)
506 * Mmi0p0 (before 5.0)
507 * Mmm0p0
508 *
509 * Development branches:
510 * Mmpxxx (before 4.6)
511 * Mmp1xx (before 4.10)
512 * Mmi1xx (before 5.0)
513 * M000xx (pre-M.0)
514 * Mmm1xx
515 *
516 * M = major version
517 * m = minor version
518 * i = minor version increment (491000 -> 4.10)
519 * p = patchlevel
520 * x = revision
521 *
522 * The first release of FreeBSD to use ELF by default
523 * was version 3.0.
524 */
525 if (desc == 460002) {
526 if (elf_printf(ms, " 4.6.2") == -1)
527 return -1;
528 } else if (desc < 460100) {
529 if (elf_printf(ms, " %d.%d", desc / 100000,
530 desc / 10000 % 10) == -1)
531 return -1;
532 if (desc / 1000 % 10 > 0)
533 if (elf_printf(ms, ".%d", desc / 1000 % 10) == -1)
534 return -1;
535 if ((desc % 1000 > 0) || (desc % 100000 == 0))
536 if (elf_printf(ms, " (%d)", desc) == -1)
537 return -1;
538 } else if (desc < 500000) {
539 if (elf_printf(ms, " %d.%d", desc / 100000,
540 desc / 10000 % 10 + desc / 1000 % 10) == -1)
541 return -1;
542 if (desc / 100 % 10 > 0) {
543 if (elf_printf(ms, " (%d)", desc) == -1)
544 return -1;
545 } else if (desc / 10 % 10 > 0) {
546 if (elf_printf(ms, ".%d", desc / 10 % 10) == -1)
547 return -1;
548 }
549 } else {
550 if (elf_printf(ms, " %d.%d", desc / 100000,
551 desc / 1000 % 100) == -1)
552 return -1;
553 if ((desc / 100 % 10 > 0) ||
554 (desc % 100000 / 100 == 0)) {
555 if (elf_printf(ms, " (%d)", desc) == -1)
556 return -1;
557 } else if (desc / 10 % 10 > 0) {
558 if (elf_printf(ms, ".%d", desc / 10 % 10) == -1)
559 return -1;
560 }
561 }
562 return 0;
563 }
564
565 file_private int
566 /*ARGSUSED*/
do_bid_note(struct magic_set * ms,unsigned char * nbuf,uint32_t type,int swap,uint32_t namesz,uint32_t descsz,size_t noff,size_t doff,int * flags)567 do_bid_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type,
568 int swap __attribute__((__unused__)), uint32_t namesz, uint32_t descsz,
569 size_t noff, size_t doff, int *flags)
570 {
571 if (NAMEEQUALS(RCAST(char *, &nbuf[noff]), "GNU") &&
572 type == NT_GNU_BUILD_ID && (descsz >= 4 && descsz <= 20)) {
573 uint8_t desc[20];
574 const char *btype;
575 uint32_t i;
576 *flags |= FLAGS_DID_BUILD_ID;
577 switch (descsz) {
578 case 8:
579 btype = "xxHash";
580 break;
581 case 16:
582 btype = "md5/uuid";
583 break;
584 case 20:
585 btype = "sha1";
586 break;
587 default:
588 btype = "unknown";
589 break;
590 }
591 if (elf_printf(ms, ", BuildID[%s]=", btype) == -1)
592 return -1;
593 memcpy(desc, &nbuf[doff], descsz);
594 for (i = 0; i < descsz; i++)
595 if (elf_printf(ms, "%02x", desc[i]) == -1)
596 return -1;
597 return 1;
598 }
599 if (namesz == 4 && memcmp(RCAST(char *, &nbuf[noff]), "Go", 3) == 0 &&
600 type == NT_GO_BUILD_ID && descsz < 128) {
601 char buf[256];
602 if (elf_printf(ms, ", Go BuildID=%s",
603 file_copystr(buf, sizeof(buf), descsz,
604 RCAST(const char *, &nbuf[doff]))) == -1)
605 return -1;
606 return 1;
607 }
608 return 0;
609 }
610
611 file_private int
do_os_note(struct magic_set * ms,unsigned char * nbuf,uint32_t type,int swap,uint32_t namesz,uint32_t descsz,size_t noff,size_t doff,int * flags)612 do_os_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type,
613 int swap, uint32_t namesz, uint32_t descsz,
614 size_t noff, size_t doff, int *flags)
615 {
616 const char *name = RCAST(const char *, &nbuf[noff]);
617
618 if (NAMEEQUALS(name, "SuSE") && type == NT_GNU_VERSION && descsz == 2) {
619 *flags |= FLAGS_DID_OS_NOTE;
620 if (elf_printf(ms, ", for SuSE %d.%d", nbuf[doff],
621 nbuf[doff + 1]) == -1)
622 return -1;
623 return 1;
624 }
625
626 if (NAMEEQUALS(name, "GNU") && type == NT_GNU_VERSION && descsz == 16) {
627 uint32_t desc[4];
628 memcpy(desc, &nbuf[doff], sizeof(desc));
629
630 *flags |= FLAGS_DID_OS_NOTE;
631 if (elf_printf(ms, ", for GNU/") == -1)
632 return -1;
633 switch (elf_getu32(swap, desc[0])) {
634 case GNU_OS_LINUX:
635 if (elf_printf(ms, "Linux") == -1)
636 return -1;
637 break;
638 case GNU_OS_HURD:
639 if (elf_printf(ms, "Hurd") == -1)
640 return -1;
641 break;
642 case GNU_OS_SOLARIS:
643 if (elf_printf(ms, "Solaris") == -1)
644 return -1;
645 break;
646 case GNU_OS_KFREEBSD:
647 if (elf_printf(ms, "kFreeBSD") == -1)
648 return -1;
649 break;
650 case GNU_OS_KNETBSD:
651 if (elf_printf(ms, "kNetBSD") == -1)
652 return -1;
653 break;
654 default:
655 if (elf_printf(ms, "<unknown>") == -1)
656 return -1;
657 }
658 if (elf_printf(ms, " %d.%d.%d", elf_getu32(swap, desc[1]),
659 elf_getu32(swap, desc[2]), elf_getu32(swap, desc[3])) == -1)
660 return -1;
661 return 1;
662 }
663
664 if (NAMEEQUALS(name, "NetBSD") &&
665 type == NT_NETBSD_VERSION && descsz == 4) {
666 *flags |= FLAGS_DID_OS_NOTE;
667 if (do_note_netbsd_version(ms, swap, &nbuf[doff]) == -1)
668 return -1;
669 return 1;
670 }
671
672 if (NAMEEQUALS(name, "FreeBSD") &&
673 type == NT_FREEBSD_VERSION && descsz == 4) {
674 *flags |= FLAGS_DID_OS_NOTE;
675 if (do_note_freebsd_version(ms, swap, &nbuf[doff])
676 == -1)
677 return -1;
678 return 1;
679 }
680
681 if (NAMEEQUALS(name, "OpenBSD") &&
682 type == NT_OPENBSD_VERSION && descsz == 4) {
683 *flags |= FLAGS_DID_OS_NOTE;
684 if (elf_printf(ms, ", for OpenBSD") == -1)
685 return -1;
686 /* Content of note is always 0 */
687 return 1;
688 }
689
690 if (NAMEEQUALS(name, "DragonFly") &&
691 type == NT_DRAGONFLY_VERSION && descsz == 4) {
692 uint32_t desc;
693 *flags |= FLAGS_DID_OS_NOTE;
694 if (elf_printf(ms, ", for DragonFly") == -1)
695 return -1;
696 memcpy(&desc, &nbuf[doff], sizeof(desc));
697 desc = elf_getu32(swap, desc);
698 if (elf_printf(ms, " %d.%d.%d", desc / 100000,
699 desc / 10000 % 10, desc % 10000) == -1)
700 return -1;
701 return 1;
702 }
703
704 if (NAMEEQUALS(name, "Android") &&
705 type == NT_ANDROID_VERSION && descsz >= 4) {
706 uint32_t api_level;
707 *flags |= FLAGS_DID_OS_NOTE;
708 memcpy(&api_level, &nbuf[doff], sizeof(api_level));
709 api_level = elf_getu32(swap, api_level);
710 if (elf_printf(ms, ", for Android %d", api_level) == -1)
711 return -1;
712 /*
713 * NDK r14 and later also include details of the NDK that
714 * built the binary. OS binaries (or binaries built by older
715 * NDKs) don't have this. The NDK release and build number
716 * are both 64-byte strings.
717 */
718 if (descsz >= 4 + 64 + 64) {
719 if (elf_printf(ms, ", built by NDK %.64s (%.64s)",
720 &nbuf[doff + 4], &nbuf[doff + 4 + 64]) == -1)
721 return -1;
722 }
723 }
724
725 return 0;
726 }
727
728 file_private int
do_pax_note(struct magic_set * ms,unsigned char * nbuf,uint32_t type,int swap,uint32_t namesz,uint32_t descsz,size_t noff,size_t doff,int * flags)729 do_pax_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type,
730 int swap, uint32_t namesz, uint32_t descsz,
731 size_t noff, size_t doff, int *flags)
732 {
733 const char *name = RCAST(const char *, &nbuf[noff]);
734
735 if (NAMEEQUALS(name, "PaX") && type == NT_NETBSD_PAX && descsz == 4) {
736 static const char *pax[] = {
737 "+mprotect",
738 "-mprotect",
739 "+segvguard",
740 "-segvguard",
741 "+ASLR",
742 "-ASLR",
743 };
744 uint32_t desc;
745 size_t i;
746 int did = 0;
747
748 *flags |= FLAGS_DID_NETBSD_PAX;
749 memcpy(&desc, &nbuf[doff], sizeof(desc));
750 desc = elf_getu32(swap, desc);
751
752 if (desc && elf_printf(ms, ", PaX: ") == -1)
753 return -1;
754
755 for (i = 0; i < __arraycount(pax); i++) {
756 if (((1 << CAST(int, i)) & desc) == 0)
757 continue;
758 if (elf_printf(ms, "%s%s", did++ ? "," : "",
759 pax[i]) == -1)
760 return -1;
761 }
762 return 1;
763 }
764 return 0;
765 }
766
767 file_private int
do_memtag_note(struct magic_set * ms,unsigned char * nbuf,uint32_t type,int swap,uint32_t namesz,uint32_t descsz,size_t noff,size_t doff,int * flags)768 do_memtag_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type,
769 int swap, uint32_t namesz, uint32_t descsz,
770 size_t noff, size_t doff, int *flags)
771 {
772 const char *name = RCAST(const char *, &nbuf[noff]);
773
774 if (NAMEEQUALS(name, "Android") &&
775 type == NT_ANDROID_MEMTAG && descsz == 4) {
776 static const char *memtag[] = {
777 "none",
778 "async",
779 "sync",
780 "heap",
781 "stack",
782 };
783 uint32_t desc;
784 size_t i;
785 int did = 0;
786
787 *flags |= FLAGS_DID_ANDROID_MEMTAG;
788 memcpy(&desc, &nbuf[doff], sizeof(desc));
789 desc = elf_getu32(swap, desc);
790
791 if (desc && elf_printf(ms, ", Android Memtag: ") == -1)
792 return -1;
793
794 for (i = 0; i < __arraycount(memtag); i++) {
795 if (((1 << CAST(int, i)) & desc) == 0)
796 continue;
797 if (elf_printf(ms, "%s%s", did++ ? "," : "",
798 memtag[i]) == -1)
799 return -1;
800 }
801 return 1;
802 }
803 return 0;
804 }
805
806 file_private int
do_core_note(struct magic_set * ms,unsigned char * nbuf,uint32_t type,int swap,uint32_t namesz,uint32_t descsz,size_t noff,size_t doff,int * flags,size_t size,int clazz)807 do_core_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type,
808 int swap, uint32_t namesz, uint32_t descsz,
809 size_t noff, size_t doff, int *flags, size_t size, int clazz)
810 {
811 #ifdef ELFCORE
812 char buf[256];
813 const char *name = RCAST(const char *, &nbuf[noff]);
814
815 int os_style = -1;
816 /*
817 * Sigh. The 2.0.36 kernel in Debian 2.1, at
818 * least, doesn't correctly implement name
819 * sections, in core dumps, as specified by
820 * the "Program Linking" section of "UNIX(R) System
821 * V Release 4 Programmer's Guide: ANSI C and
822 * Programming Support Tools", because my copy
823 * clearly says "The first 'namesz' bytes in 'name'
824 * contain a *null-terminated* [emphasis mine]
825 * character representation of the entry's owner
826 * or originator", but the 2.0.36 kernel code
827 * doesn't include the terminating null in the
828 * name....
829 */
830 if ((namesz == 4 && memcmp(name, "CORE", 4) == 0) ||
831 NAMEEQUALS(name, "CORE")) {
832 os_style = OS_STYLE_SVR4;
833 }
834
835 if (NAMEEQUALS(name, "FreeBSD")) {
836 os_style = OS_STYLE_FREEBSD;
837 }
838
839 if ((namesz >= 11 && memcmp(name, "NetBSD-CORE", 11) == 0)) {
840 os_style = OS_STYLE_NETBSD;
841 }
842
843 if (os_style != -1 && (*flags & FLAGS_DID_CORE_STYLE) == 0) {
844 if (elf_printf(ms, ", %s-style", os_style_names[os_style])
845 == -1)
846 return -1;
847 *flags |= FLAGS_DID_CORE_STYLE;
848 *flags |= os_style;
849 }
850
851 switch (os_style) {
852 case OS_STYLE_NETBSD:
853 if (type == NT_NETBSD_CORE_PROCINFO) {
854 char sbuf[512];
855 struct NetBSD_elfcore_procinfo pi;
856 memset(&pi, 0, sizeof(pi));
857 memcpy(&pi, nbuf + doff, MIN(descsz, sizeof(pi)));
858
859 if (elf_printf(ms, ", from '%.31s', pid=%u, uid=%u, "
860 "gid=%u, nlwps=%u, lwp=%u (signal %u/code %u)",
861 file_printable(ms, sbuf, sizeof(sbuf),
862 RCAST(char *, pi.cpi_name), sizeof(pi.cpi_name)),
863 elf_getu32(swap, CAST(uint32_t, pi.cpi_pid)),
864 elf_getu32(swap, pi.cpi_euid),
865 elf_getu32(swap, pi.cpi_egid),
866 elf_getu32(swap, pi.cpi_nlwps),
867 elf_getu32(swap, CAST(uint32_t, pi.cpi_siglwp)),
868 elf_getu32(swap, pi.cpi_signo),
869 elf_getu32(swap, pi.cpi_sigcode)) == -1)
870 return -1;
871
872 *flags |= FLAGS_DID_CORE;
873 return 1;
874 }
875 break;
876
877 case OS_STYLE_FREEBSD:
878 if (type == NT_PRPSINFO && *flags & FLAGS_IS_CORE) {
879 size_t argoff, pidoff;
880
881 if (clazz == ELFCLASS32)
882 argoff = 4 + 4 + 17;
883 else
884 argoff = 4 + 4 + 8 + 17;
885 if (doff + argoff + 81 <= size) {
886 if (elf_printf(ms, ", from '%.80s'",
887 nbuf + doff + argoff) == -1)
888 return -1;
889 }
890 pidoff = argoff + 81 + 2;
891 if (doff + pidoff + 4 <= size) {
892 if (elf_printf(ms, ", pid=%u",
893 elf_getu32(swap, *RCAST(uint32_t *, (nbuf +
894 doff + pidoff)))) == -1)
895 return -1;
896 }
897 *flags |= FLAGS_DID_CORE;
898 }
899 break;
900
901 default:
902 if (type == NT_PRPSINFO && *flags & FLAGS_IS_CORE) {
903 size_t i, j;
904 unsigned char c;
905 /*
906 * Extract the program name. We assume
907 * it to be 16 characters (that's what it
908 * is in SunOS 5.x and Linux).
909 *
910 * Unfortunately, it's at a different offset
911 * in various OSes, so try multiple offsets.
912 * If the characters aren't all printable,
913 * reject it.
914 */
915 for (i = 0; i < NOFFSETS; i++) {
916 unsigned char *cname, *cp;
917 size_t reloffset = prpsoffsets(i);
918 size_t noffset = doff + reloffset;
919 size_t k;
920 for (j = 0; j < 16; j++, noffset++,
921 reloffset++) {
922 /*
923 * Make sure we're not past
924 * the end of the buffer; if
925 * we are, just give up.
926 */
927 if (noffset >= size)
928 goto tryanother;
929
930 /*
931 * Make sure we're not past
932 * the end of the contents;
933 * if we are, this obviously
934 * isn't the right offset.
935 */
936 if (reloffset >= descsz)
937 goto tryanother;
938
939 c = nbuf[noffset];
940 if (c == '\0') {
941 /*
942 * A '\0' at the
943 * beginning is
944 * obviously wrong.
945 * Any other '\0'
946 * means we're done.
947 */
948 if (j == 0)
949 goto tryanother;
950 else
951 break;
952 } else {
953 /*
954 * A nonprintable
955 * character is also
956 * wrong.
957 */
958 if (!isprint(c) || isquote(c))
959 goto tryanother;
960 }
961 }
962 /*
963 * Well, that worked.
964 */
965
966 /*
967 * Try next offsets, in case this match is
968 * in the middle of a string.
969 */
970 for (k = i + 1 ; k < NOFFSETS; k++) {
971 size_t no;
972 int adjust = 1;
973 if (prpsoffsets(k) >= prpsoffsets(i))
974 continue;
975 /*
976 * pr_fname == pr_psargs - 16 &&
977 * non-nul-terminated fname (qemu)
978 */
979 if (prpsoffsets(k) ==
980 prpsoffsets(i) - 16 && j == 16)
981 continue;
982 for (no = doff + prpsoffsets(k);
983 no < doff + prpsoffsets(i); no++)
984 adjust = adjust
985 && isprint(nbuf[no]);
986 if (adjust)
987 i = k;
988 }
989
990 cname = CAST(unsigned char *,
991 &nbuf[doff + prpsoffsets(i)]);
992 for (cp = cname; cp < nbuf + size && *cp
993 && isprint(*cp); cp++)
994 continue;
995 /*
996 * Linux apparently appends a space at the end
997 * of the command line: remove it.
998 */
999 while (cp > cname && isspace(cp[-1]))
1000 cp--;
1001 if (elf_printf(ms, ", from '%s'",
1002 file_copystr(buf, sizeof(buf),
1003 CAST(size_t, cp - cname),
1004 RCAST(char *, cname))) == -1)
1005 return -1;
1006 *flags |= FLAGS_DID_CORE;
1007 return 1;
1008
1009 tryanother:
1010 ;
1011 }
1012 }
1013 break;
1014 }
1015 #endif
1016 return 0;
1017 }
1018
1019 file_private off_t
get_offset_from_virtaddr(struct magic_set * ms,int swap,int clazz,int fd,off_t off,int num,off_t fsize,uint64_t virtaddr)1020 get_offset_from_virtaddr(struct magic_set *ms, int swap, int clazz, int fd,
1021 off_t off, int num, off_t fsize, uint64_t virtaddr)
1022 {
1023 Elf32_Phdr ph32;
1024 Elf64_Phdr ph64;
1025
1026 /*
1027 * Loop through all the program headers and find the header with
1028 * virtual address in which the "virtaddr" belongs to.
1029 */
1030 for ( ; num; num--) {
1031 if (pread(fd, xph_addr, xph_sizeof, off) <
1032 CAST(ssize_t, xph_sizeof)) {
1033 if (elf_printf(ms,
1034 ", can't read elf program header at %jd",
1035 (intmax_t)off) == -1)
1036 return -1;
1037 return 0;
1038
1039 }
1040 off += xph_sizeof;
1041
1042 if (fsize != SIZE_UNKNOWN && xph_offset > fsize) {
1043 /* Perhaps warn here */
1044 continue;
1045 }
1046
1047 if (virtaddr >= xph_vaddr && virtaddr < xph_vaddr + xph_filesz)
1048 return xph_offset + (virtaddr - xph_vaddr);
1049 }
1050 return 0;
1051 }
1052
1053 file_private size_t
get_string_on_virtaddr(struct magic_set * ms,int swap,int clazz,int fd,off_t ph_off,int ph_num,off_t fsize,uint64_t virtaddr,char * buf,ssize_t buflen)1054 get_string_on_virtaddr(struct magic_set *ms,
1055 int swap, int clazz, int fd, off_t ph_off, int ph_num,
1056 off_t fsize, uint64_t virtaddr, char *buf, ssize_t buflen)
1057 {
1058 char *bptr;
1059 off_t offset;
1060
1061 if (buflen == 0)
1062 return 0;
1063
1064 offset = get_offset_from_virtaddr(ms, swap, clazz, fd, ph_off, ph_num,
1065 fsize, virtaddr);
1066 if (offset < 0 ||
1067 (buflen = pread(fd, buf, CAST(size_t, buflen), offset)) <= 0) {
1068 (void)elf_printf(ms, ", can't read elf string at %jd",
1069 (intmax_t)offset);
1070 return 0;
1071 }
1072
1073 buf[buflen - 1] = '\0';
1074
1075 /* We expect only printable characters, so return if buffer contains
1076 * non-printable character before the '\0' or just '\0'. */
1077 for (bptr = buf; *bptr && isprint(CAST(unsigned char, *bptr)); bptr++)
1078 continue;
1079 if (*bptr != '\0')
1080 return 0;
1081
1082 return bptr - buf;
1083 }
1084
1085
1086 /*ARGSUSED*/
1087 file_private int
do_auxv_note(struct magic_set * ms,unsigned char * nbuf,uint32_t type,int swap,uint32_t namesz,uint32_t descsz,size_t noff,size_t doff,int * flags,size_t size,int clazz,int fd,off_t ph_off,int ph_num,off_t fsize)1088 do_auxv_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type,
1089 int swap, uint32_t namesz __attribute__((__unused__)),
1090 uint32_t descsz __attribute__((__unused__)),
1091 size_t noff __attribute__((__unused__)), size_t doff,
1092 int *flags, size_t size __attribute__((__unused__)), int clazz,
1093 int fd, off_t ph_off, int ph_num, off_t fsize)
1094 {
1095 #ifdef ELFCORE
1096 Aux32Info auxv32;
1097 Aux64Info auxv64;
1098 size_t elsize = xauxv_sizeof;
1099 const char *tag;
1100 int is_string;
1101 size_t nval, off;
1102
1103 if ((*flags & (FLAGS_IS_CORE|FLAGS_DID_CORE_STYLE)) !=
1104 (FLAGS_IS_CORE|FLAGS_DID_CORE_STYLE))
1105 return 0;
1106
1107 switch (*flags & FLAGS_CORE_STYLE) {
1108 case OS_STYLE_SVR4:
1109 if (type != NT_AUXV)
1110 return 0;
1111 break;
1112 #ifdef notyet
1113 case OS_STYLE_NETBSD:
1114 if (type != NT_NETBSD_CORE_AUXV)
1115 return 0;
1116 break;
1117 case OS_STYLE_FREEBSD:
1118 if (type != NT_FREEBSD_PROCSTAT_AUXV)
1119 return 0;
1120 break;
1121 #endif
1122 default:
1123 return 0;
1124 }
1125
1126 *flags |= FLAGS_DID_AUXV;
1127
1128 nval = 0;
1129 for (off = 0; off + elsize <= descsz; off += elsize) {
1130 memcpy(xauxv_addr, &nbuf[doff + off], xauxv_sizeof);
1131 /* Limit processing to 50 vector entries to prevent DoS */
1132 if (nval++ >= 50) {
1133 file_error(ms, 0, "Too many ELF Auxv elements");
1134 return 1;
1135 }
1136
1137 switch(xauxv_type) {
1138 case AT_LINUX_EXECFN:
1139 is_string = 1;
1140 tag = "execfn";
1141 break;
1142 case AT_LINUX_PLATFORM:
1143 is_string = 1;
1144 tag = "platform";
1145 break;
1146 case AT_LINUX_UID:
1147 is_string = 0;
1148 tag = "real uid";
1149 break;
1150 case AT_LINUX_GID:
1151 is_string = 0;
1152 tag = "real gid";
1153 break;
1154 case AT_LINUX_EUID:
1155 is_string = 0;
1156 tag = "effective uid";
1157 break;
1158 case AT_LINUX_EGID:
1159 is_string = 0;
1160 tag = "effective gid";
1161 break;
1162 default:
1163 is_string = 0;
1164 tag = NULL;
1165 break;
1166 }
1167
1168 if (tag == NULL)
1169 continue;
1170
1171 if (is_string) {
1172 char buf[256];
1173 ssize_t buflen;
1174 buflen = get_string_on_virtaddr(ms, swap, clazz, fd,
1175 ph_off, ph_num, fsize, xauxv_val, buf, sizeof(buf));
1176
1177 if (buflen == 0)
1178 continue;
1179
1180 if (elf_printf(ms, ", %s: '%s'", tag, buf) == -1)
1181 return -1;
1182 } else {
1183 if (elf_printf(ms, ", %s: %d", tag,
1184 CAST(int, xauxv_val)) == -1)
1185 return -1;
1186 }
1187 }
1188 return 1;
1189 #else
1190 return 0;
1191 #endif
1192 }
1193
1194 file_private size_t
dodynamic(struct magic_set * ms,void * vbuf,size_t offset,size_t size,int clazz,int swap,int * pie,size_t * need)1195 dodynamic(struct magic_set *ms, void *vbuf, size_t offset, size_t size,
1196 int clazz, int swap, int *pie, size_t *need)
1197 {
1198 Elf32_Dyn dh32;
1199 Elf64_Dyn dh64;
1200 unsigned char *dbuf = CAST(unsigned char *, vbuf);
1201
1202 if (xdh_sizeof + offset > size) {
1203 /*
1204 * We're out of note headers.
1205 */
1206 return xdh_sizeof + offset;
1207 }
1208
1209 memcpy(xdh_addr, &dbuf[offset], xdh_sizeof);
1210 offset += xdh_sizeof;
1211
1212 switch (xdh_tag) {
1213 case DT_FLAGS_1:
1214 if (xdh_val & DF_1_PIE) {
1215 *pie = 1;
1216 ms->mode |= 0111;
1217 } else
1218 ms->mode &= ~0111;
1219 break;
1220 case DT_NEEDED:
1221 (*need)++;
1222 break;
1223 default:
1224 break;
1225 }
1226 return offset;
1227 }
1228
1229
1230 file_private size_t
donote(struct magic_set * ms,void * vbuf,size_t offset,size_t size,int clazz,int swap,size_t align,int * flags,uint16_t * notecount,int fd,off_t ph_off,int ph_num,off_t fsize)1231 donote(struct magic_set *ms, void *vbuf, size_t offset, size_t size,
1232 int clazz, int swap, size_t align, int *flags, uint16_t *notecount,
1233 int fd, off_t ph_off, int ph_num, off_t fsize)
1234 {
1235 Elf32_Nhdr nh32;
1236 Elf64_Nhdr nh64;
1237 size_t noff, doff;
1238 uint32_t namesz, descsz;
1239 char buf[256];
1240 unsigned char *nbuf = CAST(unsigned char *, vbuf);
1241
1242 if (*notecount == 0)
1243 return 0;
1244 --*notecount;
1245
1246 if (xnh_sizeof + offset > size) {
1247 /*
1248 * We're out of note headers.
1249 */
1250 return xnh_sizeof + offset;
1251 }
1252 /*XXX: GCC */
1253 memset(&nh32, 0, sizeof(nh32));
1254 memset(&nh64, 0, sizeof(nh64));
1255
1256 memcpy(xnh_addr, &nbuf[offset], xnh_sizeof);
1257 offset += xnh_sizeof;
1258
1259 namesz = xnh_namesz;
1260 descsz = xnh_descsz;
1261
1262 if ((namesz == 0) && (descsz == 0)) {
1263 /*
1264 * We're out of note headers.
1265 */
1266 return (offset >= size) ? offset : size;
1267 }
1268
1269 if (namesz & 0x80000000) {
1270 (void)elf_printf(ms, ", bad note name size %#lx",
1271 CAST(unsigned long, namesz));
1272 return 0;
1273 }
1274
1275 if (descsz & 0x80000000) {
1276 (void)elf_printf(ms, ", bad note description size %#lx",
1277 CAST(unsigned long, descsz));
1278 return 0;
1279 }
1280
1281 noff = offset;
1282 doff = ELF_ALIGN(offset + namesz);
1283
1284 if (offset + namesz > size) {
1285 /*
1286 * We're past the end of the buffer.
1287 */
1288 return doff;
1289 }
1290
1291 offset = ELF_ALIGN(doff + descsz);
1292 if (doff + descsz > size) {
1293 /*
1294 * We're past the end of the buffer.
1295 */
1296 return (offset >= size) ? offset : size;
1297 }
1298
1299
1300 if ((*flags & FLAGS_DID_OS_NOTE) == 0) {
1301 if (do_os_note(ms, nbuf, xnh_type, swap,
1302 namesz, descsz, noff, doff, flags))
1303 return offset;
1304 }
1305
1306 if ((*flags & FLAGS_DID_BUILD_ID) == 0) {
1307 if (do_bid_note(ms, nbuf, xnh_type, swap,
1308 namesz, descsz, noff, doff, flags))
1309 return offset;
1310 }
1311
1312 if ((*flags & FLAGS_DID_NETBSD_PAX) == 0) {
1313 if (do_pax_note(ms, nbuf, xnh_type, swap,
1314 namesz, descsz, noff, doff, flags))
1315 return offset;
1316 }
1317 if ((*flags & FLAGS_DID_ANDROID_MEMTAG) == 0) {
1318 if (do_memtag_note(ms, nbuf, xnh_type, swap,
1319 namesz, descsz, noff, doff, flags))
1320 return offset;
1321 }
1322
1323 if ((*flags & FLAGS_DID_CORE) == 0) {
1324 if (do_core_note(ms, nbuf, xnh_type, swap,
1325 namesz, descsz, noff, doff, flags, size, clazz))
1326 return offset;
1327 }
1328
1329 if ((*flags & FLAGS_DID_AUXV) == 0) {
1330 if (do_auxv_note(ms, nbuf, xnh_type, swap,
1331 namesz, descsz, noff, doff, flags, size, clazz,
1332 fd, ph_off, ph_num, fsize))
1333 return offset;
1334 }
1335
1336 if (NAMEEQUALS(RCAST(char *, &nbuf[noff]), "NetBSD")) {
1337 int descw, flag;
1338 const char *str, *tag;
1339 if (descsz > 100)
1340 descsz = 100;
1341 switch (xnh_type) {
1342 case NT_NETBSD_VERSION:
1343 return offset;
1344 case NT_NETBSD_MARCH:
1345 flag = FLAGS_DID_NETBSD_MARCH;
1346 tag = "compiled for";
1347 break;
1348 case NT_NETBSD_CMODEL:
1349 flag = FLAGS_DID_NETBSD_CMODEL;
1350 tag = "compiler model";
1351 break;
1352 case NT_NETBSD_EMULATION:
1353 flag = FLAGS_DID_NETBSD_EMULATION;
1354 tag = "emulation:";
1355 break;
1356 default:
1357 if (*flags & FLAGS_DID_NETBSD_UNKNOWN)
1358 return offset;
1359 *flags |= FLAGS_DID_NETBSD_UNKNOWN;
1360 if (elf_printf(ms, ", note=%u", xnh_type) == -1)
1361 return offset;
1362 return offset;
1363 }
1364
1365 if (*flags & flag)
1366 return offset;
1367 str = RCAST(const char *, &nbuf[doff]);
1368 descw = CAST(int, descsz);
1369 *flags |= flag;
1370 elf_printf(ms, ", %s: %s", tag,
1371 file_copystr(buf, sizeof(buf), descw, str));
1372 return offset;
1373 }
1374
1375 return offset;
1376 }
1377
1378 /* SunOS 5.x hardware capability descriptions */
1379 typedef struct cap_desc {
1380 uint64_t cd_mask;
1381 const char *cd_name;
1382 } cap_desc_t;
1383
1384 static const cap_desc_t cap_desc_sparc[] = {
1385 { AV_SPARC_MUL32, "MUL32" },
1386 { AV_SPARC_DIV32, "DIV32" },
1387 { AV_SPARC_FSMULD, "FSMULD" },
1388 { AV_SPARC_V8PLUS, "V8PLUS" },
1389 { AV_SPARC_POPC, "POPC" },
1390 { AV_SPARC_VIS, "VIS" },
1391 { AV_SPARC_VIS2, "VIS2" },
1392 { AV_SPARC_ASI_BLK_INIT, "ASI_BLK_INIT" },
1393 { AV_SPARC_FMAF, "FMAF" },
1394 { AV_SPARC_FJFMAU, "FJFMAU" },
1395 { AV_SPARC_IMA, "IMA" },
1396 { 0, NULL }
1397 };
1398
1399 static const cap_desc_t cap_desc_386[] = {
1400 { AV_386_FPU, "FPU" },
1401 { AV_386_TSC, "TSC" },
1402 { AV_386_CX8, "CX8" },
1403 { AV_386_SEP, "SEP" },
1404 { AV_386_AMD_SYSC, "AMD_SYSC" },
1405 { AV_386_CMOV, "CMOV" },
1406 { AV_386_MMX, "MMX" },
1407 { AV_386_AMD_MMX, "AMD_MMX" },
1408 { AV_386_AMD_3DNow, "AMD_3DNow" },
1409 { AV_386_AMD_3DNowx, "AMD_3DNowx" },
1410 { AV_386_FXSR, "FXSR" },
1411 { AV_386_SSE, "SSE" },
1412 { AV_386_SSE2, "SSE2" },
1413 { AV_386_PAUSE, "PAUSE" },
1414 { AV_386_SSE3, "SSE3" },
1415 { AV_386_MON, "MON" },
1416 { AV_386_CX16, "CX16" },
1417 { AV_386_AHF, "AHF" },
1418 { AV_386_TSCP, "TSCP" },
1419 { AV_386_AMD_SSE4A, "AMD_SSE4A" },
1420 { AV_386_POPCNT, "POPCNT" },
1421 { AV_386_AMD_LZCNT, "AMD_LZCNT" },
1422 { AV_386_SSSE3, "SSSE3" },
1423 { AV_386_SSE4_1, "SSE4.1" },
1424 { AV_386_SSE4_2, "SSE4.2" },
1425 { 0, NULL }
1426 };
1427
1428 file_private int
doshn(struct magic_set * ms,int clazz,int swap,int fd,off_t off,int num,size_t size,off_t fsize,int mach,int strtab,int * flags,uint16_t * notecount)1429 doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num,
1430 size_t size, off_t fsize, int mach, int strtab, int *flags,
1431 uint16_t *notecount)
1432 {
1433 Elf32_Shdr sh32;
1434 Elf64_Shdr sh64;
1435 int stripped = 1, has_debug_info = 0;
1436 size_t nbadcap = 0;
1437 void *nbuf;
1438 off_t noff, coff, name_off, offs;
1439 uint64_t cap_hw1 = 0; /* SunOS 5.x hardware capabilities */
1440 uint64_t cap_sf1 = 0; /* SunOS 5.x software capabilities */
1441 char name[50];
1442 ssize_t namesize;
1443
1444 if (ms->flags & MAGIC_MIME)
1445 return 0;
1446
1447 if (num == 0) {
1448 if (elf_printf(ms, ", no section header") == -1)
1449 return -1;
1450 return 0;
1451 }
1452 if (size != xsh_sizeof) {
1453 if (elf_printf(ms, ", corrupted section header size") == -1)
1454 return -1;
1455 return 0;
1456 }
1457
1458 /* Read offset of name section to be able to read section names later */
1459 offs = CAST(off_t, (off + size * strtab));
1460 if (pread(fd, xsh_addr, xsh_sizeof, offs) < CAST(ssize_t, xsh_sizeof)) {
1461 if (elf_printf(ms, ", missing section headers at %jd",
1462 (intmax_t)offs) == -1)
1463 return -1;
1464 return 0;
1465 }
1466 name_off = xsh_offset;
1467
1468 if (fsize != SIZE_UNKNOWN && fsize < name_off) {
1469 if (elf_printf(ms, ", too large section header offset %jd",
1470 (intmax_t)name_off) == -1)
1471 return -1;
1472 return 0;
1473 }
1474
1475 for ( ; num; num--) {
1476 /* Read the name of this section. */
1477 offs = name_off + xsh_name;
1478 if ((namesize = pread(fd, name, sizeof(name) - 1, offs))
1479 == -1) {
1480 if (elf_printf(ms,
1481 ", can't read name of elf section at %jd",
1482 (intmax_t)offs) == -1)
1483 return -1;
1484 return 0;
1485 }
1486 name[namesize] = '\0';
1487 if (strcmp(name, ".debug_info") == 0) {
1488 has_debug_info = 1;
1489 stripped = 0;
1490 }
1491
1492 if (pread(fd, xsh_addr, xsh_sizeof, off) <
1493 CAST(ssize_t, xsh_sizeof)) {
1494 if (elf_printf(ms, ", can't read elf section at %jd",
1495 (intmax_t)off) == -1)
1496 return -1;
1497 return 0;
1498 }
1499 off += size;
1500
1501 /* Things we can determine before we seek */
1502 switch (xsh_type) {
1503 case SHT_SYMTAB:
1504 #if 0
1505 case SHT_DYNSYM:
1506 #endif
1507 stripped = 0;
1508 break;
1509 default:
1510 if (fsize != SIZE_UNKNOWN && xsh_offset > fsize) {
1511 /* Perhaps warn here */
1512 continue;
1513 }
1514 break;
1515 }
1516
1517
1518 /* Things we can determine when we seek */
1519 switch (xsh_type) {
1520 case SHT_NOTE:
1521 if (CAST(uintmax_t, (xsh_size + xsh_offset)) >
1522 CAST(uintmax_t, fsize)) {
1523 if (elf_printf(ms,
1524 ", note offset/size %#" INTMAX_T_FORMAT
1525 "x+%#" INTMAX_T_FORMAT "x exceeds"
1526 " file size %#" INTMAX_T_FORMAT "x",
1527 CAST(uintmax_t, xsh_offset),
1528 CAST(uintmax_t, xsh_size),
1529 CAST(uintmax_t, fsize)) == -1)
1530 return -1;
1531 return 0;
1532 }
1533 if (xsh_size > ms->elf_shsize_max) {
1534 file_error(ms, errno, "Note section size too "
1535 "big (%ju > %zu)", (uintmax_t)xsh_size,
1536 ms->elf_shsize_max);
1537 return -1;
1538 }
1539 if ((nbuf = malloc(xsh_size)) == NULL) {
1540 file_error(ms, errno, "Cannot allocate memory"
1541 " for note");
1542 return -1;
1543 }
1544 offs = xsh_offset;
1545 if (pread(fd, nbuf, xsh_size, offs) <
1546 CAST(ssize_t, xsh_size)) {
1547 free(nbuf);
1548 if (elf_printf(ms,
1549 ", can't read elf note at %jd",
1550 (intmax_t)offs) == -1)
1551 return -1;
1552 return 0;
1553 }
1554
1555 noff = 0;
1556 for (;;) {
1557 if (noff >= CAST(off_t, xsh_size))
1558 break;
1559 noff = donote(ms, nbuf, CAST(size_t, noff),
1560 xsh_size, clazz, swap, 4, flags, notecount,
1561 fd, 0, 0, 0);
1562 if (noff == 0)
1563 break;
1564 }
1565 free(nbuf);
1566 break;
1567 case SHT_SUNW_cap:
1568 switch (mach) {
1569 case EM_SPARC:
1570 case EM_SPARCV9:
1571 case EM_IA_64:
1572 case EM_386:
1573 case EM_AMD64:
1574 break;
1575 default:
1576 goto skip;
1577 }
1578
1579 if (nbadcap > 5)
1580 break;
1581 if (lseek(fd, xsh_offset, SEEK_SET)
1582 == CAST(off_t, -1)) {
1583 file_badseek(ms);
1584 return -1;
1585 }
1586 coff = 0;
1587 for (;;) {
1588 Elf32_Cap cap32;
1589 Elf64_Cap cap64;
1590 cap32.c_un.c_val = 0;
1591 cap64.c_un.c_val = 0;
1592 char cbuf[/*CONSTCOND*/
1593 MAX(sizeof(cap32), sizeof(cap64))];
1594 if ((coff += xcap_sizeof) >
1595 CAST(off_t, xsh_size))
1596 break;
1597 if (read(fd, cbuf, CAST(size_t, xcap_sizeof)) !=
1598 CAST(ssize_t, xcap_sizeof)) {
1599 file_badread(ms);
1600 return -1;
1601 }
1602 if (cbuf[0] == 'A') {
1603 #ifdef notyet
1604 char *p = cbuf + 1;
1605 uint32_t len, tag;
1606 memcpy(&len, p, sizeof(len));
1607 p += 4;
1608 len = getu32(swap, len);
1609 if (memcmp("gnu", p, 3) != 0) {
1610 if (elf_printf(ms,
1611 ", unknown capability %.3s", p)
1612 == -1)
1613 return -1;
1614 break;
1615 }
1616 p += strlen(p) + 1;
1617 tag = *p++;
1618 memcpy(&len, p, sizeof(len));
1619 p += 4;
1620 len = getu32(swap, len);
1621 if (tag != 1) {
1622 if (elf_printf(ms, ", unknown gnu"
1623 " capability tag %d", tag)
1624 == -1)
1625 return -1;
1626 break;
1627 }
1628 // gnu attributes
1629 #endif
1630 break;
1631 }
1632 memcpy(xcap_addr, cbuf, xcap_sizeof);
1633 switch (xcap_tag) {
1634 case CA_SUNW_NULL:
1635 break;
1636 case CA_SUNW_HW_1:
1637 cap_hw1 |= xcap_val;
1638 break;
1639 case CA_SUNW_SF_1:
1640 cap_sf1 |= xcap_val;
1641 break;
1642 default:
1643 if (elf_printf(ms,
1644 ", with unknown capability "
1645 "%#" INT64_T_FORMAT "x = %#"
1646 INT64_T_FORMAT "x",
1647 CAST(unsigned long long, xcap_tag),
1648 CAST(unsigned long long, xcap_val))
1649 == -1)
1650 return -1;
1651 if (nbadcap++ > 2)
1652 goto skip;
1653 break;
1654 }
1655 }
1656 /*FALLTHROUGH*/
1657 skip:
1658 default:
1659 break;
1660 }
1661 }
1662
1663 if (has_debug_info) {
1664 if (elf_printf(ms, ", with debug_info") == -1)
1665 return -1;
1666 }
1667 if (elf_printf(ms, ", %sstripped", stripped ? "" : "not ") == -1)
1668 return -1;
1669 if (cap_hw1) {
1670 const cap_desc_t *cdp;
1671 switch (mach) {
1672 case EM_SPARC:
1673 case EM_SPARC32PLUS:
1674 case EM_SPARCV9:
1675 cdp = cap_desc_sparc;
1676 break;
1677 case EM_386:
1678 case EM_IA_64:
1679 case EM_AMD64:
1680 cdp = cap_desc_386;
1681 break;
1682 default:
1683 cdp = NULL;
1684 break;
1685 }
1686 if (elf_printf(ms, ", uses") == -1)
1687 return -1;
1688 if (cdp) {
1689 while (cdp->cd_name) {
1690 if (cap_hw1 & cdp->cd_mask) {
1691 if (elf_printf(ms,
1692 " %s", cdp->cd_name) == -1)
1693 return -1;
1694 cap_hw1 &= ~cdp->cd_mask;
1695 }
1696 ++cdp;
1697 }
1698 if (cap_hw1)
1699 if (elf_printf(ms,
1700 " unknown hardware capability %#"
1701 INT64_T_FORMAT "x",
1702 CAST(unsigned long long, cap_hw1)) == -1)
1703 return -1;
1704 } else {
1705 if (elf_printf(ms,
1706 " hardware capability %#" INT64_T_FORMAT "x",
1707 CAST(unsigned long long, cap_hw1)) == -1)
1708 return -1;
1709 }
1710 }
1711 if (cap_sf1) {
1712 if (cap_sf1 & SF1_SUNW_FPUSED) {
1713 if (elf_printf(ms,
1714 (cap_sf1 & SF1_SUNW_FPKNWN)
1715 ? ", uses frame pointer"
1716 : ", not known to use frame pointer") == -1)
1717 return -1;
1718 }
1719 cap_sf1 &= ~SF1_SUNW_MASK;
1720 if (cap_sf1)
1721 if (elf_printf(ms,
1722 ", with unknown software capability %#"
1723 INT64_T_FORMAT "x",
1724 CAST(unsigned long long, cap_sf1)) == -1)
1725 return -1;
1726 }
1727 return 0;
1728 }
1729
1730 /*
1731 * Look through the program headers of an executable image, to determine
1732 * if it is statically or dynamically linked. If it has a dynamic section,
1733 * it is pie, and does not have an interpreter or needed libraries, we
1734 * call it static pie.
1735 */
1736 file_private int
dophn_exec(struct magic_set * ms,int clazz,int swap,int fd,off_t off,int num,size_t size,off_t fsize,int sh_num,int * flags,uint16_t * notecount)1737 dophn_exec(struct magic_set *ms, int clazz, int swap, int fd, off_t off,
1738 int num, size_t size, off_t fsize, int sh_num, int *flags,
1739 uint16_t *notecount)
1740 {
1741 Elf32_Phdr ph32;
1742 Elf64_Phdr ph64;
1743 const char *str;
1744 unsigned char nbuf[NBUFSIZE];
1745 char interp[NBUFSIZE];
1746 ssize_t bufsize;
1747 size_t offset, align, need = 0;
1748 int pie = 0, dynamic = 0;
1749
1750 if (num == 0) {
1751 if (elf_printf(ms, ", no program header") == -1)
1752 return -1;
1753 return 0;
1754 }
1755 if (size != xph_sizeof) {
1756 if (elf_printf(ms, ", corrupted program header size") == -1)
1757 return -1;
1758 return 0;
1759 }
1760
1761 interp[0] = '\0';
1762 for ( ; num; num--) {
1763 int doread;
1764 if (pread(fd, xph_addr, xph_sizeof, off) <
1765 CAST(ssize_t, xph_sizeof)) {
1766 if (elf_printf(ms,
1767 ", can't read elf program headers at %jd",
1768 (intmax_t)off) == -1)
1769 return -1;
1770 return 0;
1771 }
1772
1773 off += size;
1774 bufsize = 0;
1775 align = 4;
1776
1777 /* Things we can determine before we seek */
1778 switch (xph_type) {
1779 case PT_DYNAMIC:
1780 doread = 1;
1781 break;
1782 case PT_NOTE:
1783 if (sh_num) /* Did this through section headers */
1784 continue;
1785 if (((align = xph_align) & 0x80000000UL) != 0 ||
1786 align < 4) {
1787 if (elf_printf(ms,
1788 ", invalid note alignment %#lx",
1789 CAST(unsigned long, align)) == -1)
1790 return -1;
1791 align = 4;
1792 }
1793 /*FALLTHROUGH*/
1794 case PT_INTERP:
1795 doread = 1;
1796 break;
1797 default:
1798 doread = 0;
1799 if (fsize != SIZE_UNKNOWN && xph_offset > fsize) {
1800 /* Maybe warn here? */
1801 continue;
1802 }
1803 break;
1804 }
1805
1806 if (doread) {
1807 size_t len = xph_filesz < sizeof(nbuf) ? xph_filesz
1808 : sizeof(nbuf);
1809 off_t offs = xph_offset;
1810 bufsize = pread(fd, nbuf, len, offs);
1811 if (bufsize == -1) {
1812 if (elf_printf(ms,
1813 ", can't read section at %jd",
1814 (intmax_t)offs) == -1)
1815 return -1;
1816 return 0;
1817 }
1818 }
1819
1820 /* Things we can determine when we seek */
1821 switch (xph_type) {
1822 case PT_DYNAMIC:
1823 dynamic = 1;
1824 offset = 0;
1825 // Let DF_1 determine if we are PIE or not.
1826 ms->mode &= ~0111;
1827 for (;;) {
1828 if (offset >= CAST(size_t, bufsize))
1829 break;
1830 offset = dodynamic(ms, nbuf, offset,
1831 CAST(size_t, bufsize), clazz, swap,
1832 &pie, &need);
1833 if (offset == 0)
1834 break;
1835 }
1836 break;
1837
1838 case PT_INTERP:
1839 need++;
1840 if (ms->flags & MAGIC_MIME)
1841 continue;
1842 if (bufsize && nbuf[0]) {
1843 nbuf[bufsize - 1] = '\0';
1844 str = RCAST(const char *, nbuf);
1845 } else
1846 str = "*empty*";
1847 strlcpy(interp, str, sizeof(interp));
1848 break;
1849 case PT_NOTE:
1850 if (ms->flags & MAGIC_MIME)
1851 return 0;
1852 /*
1853 * This is a PT_NOTE section; loop through all the notes
1854 * in the section.
1855 */
1856 offset = 0;
1857 for (;;) {
1858 if (offset >= CAST(size_t, bufsize))
1859 break;
1860 offset = donote(ms, nbuf, offset,
1861 CAST(size_t, bufsize), clazz, swap, align,
1862 flags, notecount, fd, 0, 0, 0);
1863 if (offset == 0)
1864 break;
1865 }
1866 break;
1867 default:
1868 if (ms->flags & MAGIC_MIME)
1869 continue;
1870 break;
1871 }
1872 }
1873 if (ms->flags & MAGIC_MIME)
1874 return 0;
1875 if (dynamic) {
1876 if (pie && need == 0)
1877 str = "static-pie";
1878 else
1879 str = "dynamically";
1880 } else {
1881 str = "statically";
1882 }
1883 if (elf_printf(ms, ", %s linked", str) == -1)
1884 return -1;
1885 if (interp[0])
1886 if (elf_printf(ms, ", interpreter %s", file_printable(ms,
1887 RCAST(char *, nbuf), sizeof(nbuf),
1888 interp, sizeof(interp))) == -1)
1889 return -1;
1890 return 0;
1891 }
1892
1893
1894 file_protected int
file_tryelf(struct magic_set * ms,const struct buffer * b)1895 file_tryelf(struct magic_set *ms, const struct buffer *b)
1896 {
1897 int fd = b->fd;
1898 const unsigned char *buf = CAST(const unsigned char *, b->fbuf);
1899 size_t nbytes = b->flen;
1900 union {
1901 int32_t l;
1902 char c[sizeof(int32_t)];
1903 } u;
1904 int clazz;
1905 int swap;
1906 struct stat st;
1907 const struct stat *stp;
1908 off_t fsize;
1909 int flags = 0;
1910 Elf32_Ehdr elf32hdr;
1911 Elf64_Ehdr elf64hdr;
1912 uint16_t type, phnum, shnum, notecount;
1913
1914 if (ms->flags & (MAGIC_APPLE|MAGIC_EXTENSION))
1915 return 0;
1916 /*
1917 * ELF executables have multiple section headers in arbitrary
1918 * file locations and thus file(1) cannot determine it from easily.
1919 * Instead we traverse thru all section headers until a symbol table
1920 * one is found or else the binary is stripped.
1921 * Return immediately if it's not ELF (so we avoid pipe2file unless
1922 * needed).
1923 */
1924 if (buf[EI_MAG0] != ELFMAG0
1925 || (buf[EI_MAG1] != ELFMAG1 && buf[EI_MAG1] != OLFMAG1)
1926 || buf[EI_MAG2] != ELFMAG2 || buf[EI_MAG3] != ELFMAG3)
1927 return 0;
1928
1929 /*
1930 * If we cannot seek, it must be a pipe, socket or fifo.
1931 */
1932 if((lseek(fd, CAST(off_t, 0), SEEK_SET) == CAST(off_t, -1))
1933 && (errno == ESPIPE))
1934 fd = file_pipe2file(ms, fd, buf, nbytes);
1935
1936 if (fd == -1) {
1937 file_badread(ms);
1938 return -1;
1939 }
1940
1941 stp = &b->st;
1942 /*
1943 * b->st.st_size != 0 if previous fstat() succeeded,
1944 * which is likely, we can avoid extra stat() call.
1945 */
1946 if (b->st.st_size == 0) {
1947 stp = &st;
1948 if (fstat(fd, &st) == -1) {
1949 file_badread(ms);
1950 return -1;
1951 }
1952 }
1953 if (S_ISREG(stp->st_mode) || stp->st_size != 0)
1954 fsize = stp->st_size;
1955 else
1956 fsize = SIZE_UNKNOWN;
1957
1958 clazz = buf[EI_CLASS];
1959
1960 switch (clazz) {
1961 case ELFCLASS32:
1962 #undef elf_getu
1963 #define elf_getu(a, b) elf_getu32(a, b)
1964 #undef elfhdr
1965 #define elfhdr elf32hdr
1966 #include "elfclass.h"
1967 case ELFCLASS64:
1968 #undef elf_getu
1969 #define elf_getu(a, b) elf_getu64(a, b)
1970 #undef elfhdr
1971 #define elfhdr elf64hdr
1972 #include "elfclass.h"
1973 default:
1974 if (elf_printf(ms, ", unknown class %d", clazz) == -1)
1975 return -1;
1976 break;
1977 }
1978 return 0;
1979 }
1980 #endif
1981