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readelf.c (276415) readelf.c (277592)
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

--- 13 unchanged lines hidden (view full) ---

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
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

--- 13 unchanged lines hidden (view full) ---

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
30FILE_RCSID("@(#)$File: readelf.c,v 1.111 2014/12/09 02:47:45 christos Exp $")
30FILE_RCSID("@(#)$File: readelf.c,v 1.117 2014/12/16 23:29:42 christos Exp $")
31#endif
32
33#ifdef BUILTIN_ELF
34#include <string.h>
35#include <ctype.h>
36#include <stdlib.h>
37#ifdef HAVE_UNISTD_H
38#include <unistd.h>
39#endif
40
41#include "readelf.h"
42#include "magic.h"
43
44#ifdef ELFCORE
45private int dophn_core(struct magic_set *, int, int, int, off_t, int, size_t,
31#endif
32
33#ifdef BUILTIN_ELF
34#include <string.h>
35#include <ctype.h>
36#include <stdlib.h>
37#ifdef HAVE_UNISTD_H
38#include <unistd.h>
39#endif
40
41#include "readelf.h"
42#include "magic.h"
43
44#ifdef ELFCORE
45private int dophn_core(struct magic_set *, int, int, int, off_t, int, size_t,
46 off_t, int *);
46 off_t, int *, uint16_t *);
47#endif
48private int dophn_exec(struct magic_set *, int, int, int, off_t, int, size_t,
47#endif
48private int dophn_exec(struct magic_set *, int, int, int, off_t, int, size_t,
49 off_t, int *, int);
49 off_t, int, int *, uint16_t *);
50private int doshn(struct magic_set *, int, int, int, off_t, int, size_t,
50private int doshn(struct magic_set *, int, int, int, off_t, int, size_t,
51 off_t, int *, int, int);
51 off_t, int, int, int *, uint16_t *);
52private size_t donote(struct magic_set *, void *, size_t, size_t, int,
52private size_t donote(struct magic_set *, void *, size_t, size_t, int,
53 int, size_t, int *);
53 int, size_t, int *, uint16_t *);
54
55#define ELF_ALIGN(a) ((((a) + align - 1) / align) * align)
56
57#define isquote(c) (strchr("'\"`", (c)) != NULL)
58
59private uint16_t getu16(int, uint16_t);
60private uint32_t getu32(int, uint32_t);
61private uint64_t getu64(int, uint64_t);
62
63#define MAX_PHNUM 128
64#define MAX_SHNUM 32768
65#define SIZE_UNKNOWN ((off_t)-1)
66
67private int
68toomany(struct magic_set *ms, const char *name, uint16_t num)
69{
54
55#define ELF_ALIGN(a) ((((a) + align - 1) / align) * align)
56
57#define isquote(c) (strchr("'\"`", (c)) != NULL)
58
59private uint16_t getu16(int, uint16_t);
60private uint32_t getu32(int, uint32_t);
61private uint64_t getu64(int, uint64_t);
62
63#define MAX_PHNUM 128
64#define MAX_SHNUM 32768
65#define SIZE_UNKNOWN ((off_t)-1)
66
67private int
68toomany(struct magic_set *ms, const char *name, uint16_t num)
69{
70 if (file_printf(ms, ", too many %s header sections (%u)", name, num
70 if (file_printf(ms, ", too many %s (%u)", name, num
71 ) == -1)
72 return -1;
73 return 0;
74}
75
76private uint16_t
77getu16(int swap, uint16_t value)
78{

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288#define OS_STYLE_NETBSD 2
289
290private const char os_style_names[][8] = {
291 "SVR4",
292 "FreeBSD",
293 "NetBSD",
294};
295
71 ) == -1)
72 return -1;
73 return 0;
74}
75
76private uint16_t
77getu16(int swap, uint16_t value)
78{

--- 209 unchanged lines hidden (view full) ---

288#define OS_STYLE_NETBSD 2
289
290private const char os_style_names[][8] = {
291 "SVR4",
292 "FreeBSD",
293 "NetBSD",
294};
295
296#define FLAGS_DID_CORE 0x01
297#define FLAGS_DID_NOTE 0x02
298#define FLAGS_DID_BUILD_ID 0x04
299#define FLAGS_DID_CORE_STYLE 0x08
300#define FLAGS_IS_CORE 0x10
296#define FLAGS_DID_CORE 0x001
297#define FLAGS_DID_OS_NOTE 0x002
298#define FLAGS_DID_BUILD_ID 0x004
299#define FLAGS_DID_CORE_STYLE 0x008
300#define FLAGS_DID_NETBSD_PAX 0x010
301#define FLAGS_DID_NETBSD_MARCH 0x020
302#define FLAGS_DID_NETBSD_CMODEL 0x040
303#define FLAGS_DID_NETBSD_UNKNOWN 0x080
304#define FLAGS_IS_CORE 0x100
301
302private int
303dophn_core(struct magic_set *ms, int clazz, int swap, int fd, off_t off,
305
306private int
307dophn_core(struct magic_set *ms, int clazz, int swap, int fd, off_t off,
304 int num, size_t size, off_t fsize, int *flags)
308 int num, size_t size, off_t fsize, int *flags, uint16_t *notecount)
305{
306 Elf32_Phdr ph32;
307 Elf64_Phdr ph64;
308 size_t offset, len;
309 unsigned char nbuf[BUFSIZ];
310 ssize_t bufsize;
311
312 if (size != xph_sizeof) {
313 if (file_printf(ms, ", corrupted program header size") == -1)
314 return -1;
315 return 0;
316 }
317
318 /*
319 * Loop through all the program headers.
320 */
321 for ( ; num; num--) {
309{
310 Elf32_Phdr ph32;
311 Elf64_Phdr ph64;
312 size_t offset, len;
313 unsigned char nbuf[BUFSIZ];
314 ssize_t bufsize;
315
316 if (size != xph_sizeof) {
317 if (file_printf(ms, ", corrupted program header size") == -1)
318 return -1;
319 return 0;
320 }
321
322 /*
323 * Loop through all the program headers.
324 */
325 for ( ; num; num--) {
322 if (pread(fd, xph_addr, xph_sizeof, off) == -1) {
326 if (pread(fd, xph_addr, xph_sizeof, off) < (ssize_t)xph_sizeof) {
323 file_badread(ms);
324 return -1;
325 }
326 off += size;
327
328 if (fsize != SIZE_UNKNOWN && xph_offset > fsize) {
329 /* Perhaps warn here */
330 continue;

--- 11 unchanged lines hidden (view full) ---

342 file_badread(ms);
343 return -1;
344 }
345 offset = 0;
346 for (;;) {
347 if (offset >= (size_t)bufsize)
348 break;
349 offset = donote(ms, nbuf, offset, (size_t)bufsize,
327 file_badread(ms);
328 return -1;
329 }
330 off += size;
331
332 if (fsize != SIZE_UNKNOWN && xph_offset > fsize) {
333 /* Perhaps warn here */
334 continue;

--- 11 unchanged lines hidden (view full) ---

346 file_badread(ms);
347 return -1;
348 }
349 offset = 0;
350 for (;;) {
351 if (offset >= (size_t)bufsize)
352 break;
353 offset = donote(ms, nbuf, offset, (size_t)bufsize,
350 clazz, swap, 4, flags);
354 clazz, swap, 4, flags, notecount);
351 if (offset == 0)
352 break;
353
354 }
355 }
356 return 0;
357}
358#endif

--- 113 unchanged lines hidden (view full) ---

472 return;
473 } else if (desc / 10 % 10 > 0) {
474 if (file_printf(ms, ".%d", desc / 10 % 10) == -1)
475 return;
476 }
477 }
478}
479
355 if (offset == 0)
356 break;
357
358 }
359 }
360 return 0;
361}
362#endif

--- 113 unchanged lines hidden (view full) ---

476 return;
477 } else if (desc / 10 % 10 > 0) {
478 if (file_printf(ms, ".%d", desc / 10 % 10) == -1)
479 return;
480 }
481 }
482}
483
480private size_t
481donote(struct magic_set *ms, void *vbuf, size_t offset, size_t size,
482 int clazz, int swap, size_t align, int *flags)
484private int
485do_bid_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type,
486 int swap __attribute__((__unused__)), uint32_t namesz, uint32_t descsz,
487 size_t noff, size_t doff, int *flags)
483{
488{
484 Elf32_Nhdr nh32;
485 Elf64_Nhdr nh64;
486 size_t noff, doff;
487#ifdef ELFCORE
488 int os_style = -1;
489#endif
490 uint32_t namesz, descsz;
491 unsigned char *nbuf = CAST(unsigned char *, vbuf);
492
493 if (xnh_sizeof + offset > size) {
494 /*
495 * We're out of note headers.
496 */
497 return xnh_sizeof + offset;
489 if (namesz == 4 && strcmp((char *)&nbuf[noff], "GNU") == 0 &&
490 type == NT_GNU_BUILD_ID && (descsz == 16 || descsz == 20)) {
491 uint8_t desc[20];
492 uint32_t i;
493 *flags |= FLAGS_DID_BUILD_ID;
494 if (file_printf(ms, ", BuildID[%s]=", descsz == 16 ? "md5/uuid" :
495 "sha1") == -1)
496 return 1;
497 (void)memcpy(desc, &nbuf[doff], descsz);
498 for (i = 0; i < descsz; i++)
499 if (file_printf(ms, "%02x", desc[i]) == -1)
500 return 1;
501 return 1;
498 }
502 }
503 return 0;
504}
499
505
500 (void)memcpy(xnh_addr, &nbuf[offset], xnh_sizeof);
501 offset += xnh_sizeof;
502
503 namesz = xnh_namesz;
504 descsz = xnh_descsz;
505 if ((namesz == 0) && (descsz == 0)) {
506 /*
507 * We're out of note headers.
508 */
509 return (offset >= size) ? offset : size;
510 }
511
512 if (namesz & 0x80000000) {
513 (void)file_printf(ms, ", bad note name size 0x%lx",
514 (unsigned long)namesz);
515 return 0;
516 }
517
518 if (descsz & 0x80000000) {
519 (void)file_printf(ms, ", bad note description size 0x%lx",
520 (unsigned long)descsz);
521 return 0;
522 }
523
524
525 noff = offset;
526 doff = ELF_ALIGN(offset + namesz);
527
528 if (offset + namesz > size) {
529 /*
530 * We're past the end of the buffer.
531 */
532 return doff;
533 }
534
535 offset = ELF_ALIGN(doff + descsz);
536 if (doff + descsz > size) {
537 /*
538 * We're past the end of the buffer.
539 */
540 return (offset >= size) ? offset : size;
541 }
542
543 if ((*flags & (FLAGS_DID_NOTE|FLAGS_DID_BUILD_ID)) ==
544 (FLAGS_DID_NOTE|FLAGS_DID_BUILD_ID))
545 goto core;
546
506private int
507do_os_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type,
508 int swap, uint32_t namesz, uint32_t descsz,
509 size_t noff, size_t doff, int *flags)
510{
547 if (namesz == 5 && strcmp((char *)&nbuf[noff], "SuSE") == 0 &&
511 if (namesz == 5 && strcmp((char *)&nbuf[noff], "SuSE") == 0 &&
548 xnh_type == NT_GNU_VERSION && descsz == 2) {
512 type == NT_GNU_VERSION && descsz == 2) {
513 *flags |= FLAGS_DID_OS_NOTE;
549 file_printf(ms, ", for SuSE %d.%d", nbuf[doff], nbuf[doff + 1]);
514 file_printf(ms, ", for SuSE %d.%d", nbuf[doff], nbuf[doff + 1]);
515 return 1;
550 }
516 }
517
551 if (namesz == 4 && strcmp((char *)&nbuf[noff], "GNU") == 0 &&
518 if (namesz == 4 && strcmp((char *)&nbuf[noff], "GNU") == 0 &&
552 xnh_type == NT_GNU_VERSION && descsz == 16) {
519 type == NT_GNU_VERSION && descsz == 16) {
553 uint32_t desc[4];
554 (void)memcpy(desc, &nbuf[doff], sizeof(desc));
555
520 uint32_t desc[4];
521 (void)memcpy(desc, &nbuf[doff], sizeof(desc));
522
523 *flags |= FLAGS_DID_OS_NOTE;
556 if (file_printf(ms, ", for GNU/") == -1)
524 if (file_printf(ms, ", for GNU/") == -1)
557 return size;
525 return 1;
558 switch (elf_getu32(swap, desc[0])) {
559 case GNU_OS_LINUX:
560 if (file_printf(ms, "Linux") == -1)
526 switch (elf_getu32(swap, desc[0])) {
527 case GNU_OS_LINUX:
528 if (file_printf(ms, "Linux") == -1)
561 return size;
529 return 1;
562 break;
563 case GNU_OS_HURD:
564 if (file_printf(ms, "Hurd") == -1)
530 break;
531 case GNU_OS_HURD:
532 if (file_printf(ms, "Hurd") == -1)
565 return size;
533 return 1;
566 break;
567 case GNU_OS_SOLARIS:
568 if (file_printf(ms, "Solaris") == -1)
534 break;
535 case GNU_OS_SOLARIS:
536 if (file_printf(ms, "Solaris") == -1)
569 return size;
537 return 1;
570 break;
571 case GNU_OS_KFREEBSD:
572 if (file_printf(ms, "kFreeBSD") == -1)
538 break;
539 case GNU_OS_KFREEBSD:
540 if (file_printf(ms, "kFreeBSD") == -1)
573 return size;
541 return 1;
574 break;
575 case GNU_OS_KNETBSD:
576 if (file_printf(ms, "kNetBSD") == -1)
542 break;
543 case GNU_OS_KNETBSD:
544 if (file_printf(ms, "kNetBSD") == -1)
577 return size;
545 return 1;
578 break;
579 default:
580 if (file_printf(ms, "<unknown>") == -1)
546 break;
547 default:
548 if (file_printf(ms, "<unknown>") == -1)
581 return size;
549 return 1;
582 }
583 if (file_printf(ms, " %d.%d.%d", elf_getu32(swap, desc[1]),
584 elf_getu32(swap, desc[2]), elf_getu32(swap, desc[3])) == -1)
550 }
551 if (file_printf(ms, " %d.%d.%d", elf_getu32(swap, desc[1]),
552 elf_getu32(swap, desc[2]), elf_getu32(swap, desc[3])) == -1)
585 return size;
586 *flags |= FLAGS_DID_NOTE;
587 return size;
553 return 1;
554 return 1;
588 }
589
555 }
556
590 if (namesz == 4 && strcmp((char *)&nbuf[noff], "GNU") == 0 &&
591 xnh_type == NT_GNU_BUILD_ID && (descsz == 16 || descsz == 20)) {
592 uint8_t desc[20];
593 uint32_t i;
594 if (file_printf(ms, ", BuildID[%s]=", descsz == 16 ? "md5/uuid" :
595 "sha1") == -1)
596 return size;
597 (void)memcpy(desc, &nbuf[doff], descsz);
598 for (i = 0; i < descsz; i++)
599 if (file_printf(ms, "%02x", desc[i]) == -1)
600 return size;
601 *flags |= FLAGS_DID_BUILD_ID;
557 if (namesz == 7 && strcmp((char *)&nbuf[noff], "NetBSD") == 0) {
558 if (type == NT_NETBSD_VERSION && descsz == 4) {
559 *flags |= FLAGS_DID_OS_NOTE;
560 do_note_netbsd_version(ms, swap, &nbuf[doff]);
561 return 1;
562 }
602 }
603
563 }
564
565 if (namesz == 8 && strcmp((char *)&nbuf[noff], "FreeBSD") == 0) {
566 if (type == NT_FREEBSD_VERSION && descsz == 4) {
567 *flags |= FLAGS_DID_OS_NOTE;
568 do_note_freebsd_version(ms, swap, &nbuf[doff]);
569 return 1;
570 }
571 }
572
573 if (namesz == 8 && strcmp((char *)&nbuf[noff], "OpenBSD") == 0 &&
574 type == NT_OPENBSD_VERSION && descsz == 4) {
575 *flags |= FLAGS_DID_OS_NOTE;
576 if (file_printf(ms, ", for OpenBSD") == -1)
577 return 1;
578 /* Content of note is always 0 */
579 return 1;
580 }
581
582 if (namesz == 10 && strcmp((char *)&nbuf[noff], "DragonFly") == 0 &&
583 type == NT_DRAGONFLY_VERSION && descsz == 4) {
584 uint32_t desc;
585 *flags |= FLAGS_DID_OS_NOTE;
586 if (file_printf(ms, ", for DragonFly") == -1)
587 return 1;
588 (void)memcpy(&desc, &nbuf[doff], sizeof(desc));
589 desc = elf_getu32(swap, desc);
590 if (file_printf(ms, " %d.%d.%d", desc / 100000,
591 desc / 10000 % 10, desc % 10000) == -1)
592 return 1;
593 return 1;
594 }
595 return 0;
596}
597
598private int
599do_pax_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type,
600 int swap, uint32_t namesz, uint32_t descsz,
601 size_t noff, size_t doff, int *flags)
602{
604 if (namesz == 4 && strcmp((char *)&nbuf[noff], "PaX") == 0 &&
603 if (namesz == 4 && strcmp((char *)&nbuf[noff], "PaX") == 0 &&
605 xnh_type == NT_NETBSD_PAX && descsz == 4) {
604 type == NT_NETBSD_PAX && descsz == 4) {
606 static const char *pax[] = {
607 "+mprotect",
608 "-mprotect",
609 "+segvguard",
610 "-segvguard",
611 "+ASLR",
612 "-ASLR",
613 };
614 uint32_t desc;
615 size_t i;
616 int did = 0;
617
605 static const char *pax[] = {
606 "+mprotect",
607 "-mprotect",
608 "+segvguard",
609 "-segvguard",
610 "+ASLR",
611 "-ASLR",
612 };
613 uint32_t desc;
614 size_t i;
615 int did = 0;
616
617 *flags |= FLAGS_DID_NETBSD_PAX;
618 (void)memcpy(&desc, &nbuf[doff], sizeof(desc));
619 desc = elf_getu32(swap, desc);
620
621 if (desc && file_printf(ms, ", PaX: ") == -1)
618 (void)memcpy(&desc, &nbuf[doff], sizeof(desc));
619 desc = elf_getu32(swap, desc);
620
621 if (desc && file_printf(ms, ", PaX: ") == -1)
622 return size;
622 return 1;
623
624 for (i = 0; i < __arraycount(pax); i++) {
625 if (((1 << i) & desc) == 0)
626 continue;
627 if (file_printf(ms, "%s%s", did++ ? "," : "",
628 pax[i]) == -1)
623
624 for (i = 0; i < __arraycount(pax); i++) {
625 if (((1 << i) & desc) == 0)
626 continue;
627 if (file_printf(ms, "%s%s", did++ ? "," : "",
628 pax[i]) == -1)
629 return size;
629 return 1;
630 }
630 }
631 return 1;
631 }
632 }
633 return 0;
634}
632
635
633 if (namesz == 7 && strcmp((char *)&nbuf[noff], "NetBSD") == 0) {
634 switch (xnh_type) {
635 case NT_NETBSD_VERSION:
636 if (descsz == 4) {
637 do_note_netbsd_version(ms, swap, &nbuf[doff]);
638 *flags |= FLAGS_DID_NOTE;
639 return size;
640 }
641 break;
642 case NT_NETBSD_MARCH:
643 if (file_printf(ms, ", compiled for: %.*s", (int)descsz,
644 (const char *)&nbuf[doff]) == -1)
645 return size;
646 break;
647 case NT_NETBSD_CMODEL:
648 if (file_printf(ms, ", compiler model: %.*s",
649 (int)descsz, (const char *)&nbuf[doff]) == -1)
650 return size;
651 break;
652 default:
653 if (file_printf(ms, ", note=%u", xnh_type) == -1)
654 return size;
655 break;
656 }
657 return size;
658 }
659
660 if (namesz == 8 && strcmp((char *)&nbuf[noff], "FreeBSD") == 0) {
661 if (xnh_type == NT_FREEBSD_VERSION && descsz == 4) {
662 do_note_freebsd_version(ms, swap, &nbuf[doff]);
663 *flags |= FLAGS_DID_NOTE;
664 return size;
665 }
666 }
667
668 if (namesz == 8 && strcmp((char *)&nbuf[noff], "OpenBSD") == 0 &&
669 xnh_type == NT_OPENBSD_VERSION && descsz == 4) {
670 if (file_printf(ms, ", for OpenBSD") == -1)
671 return size;
672 /* Content of note is always 0 */
673 *flags |= FLAGS_DID_NOTE;
674 return size;
675 }
676
677 if (namesz == 10 && strcmp((char *)&nbuf[noff], "DragonFly") == 0 &&
678 xnh_type == NT_DRAGONFLY_VERSION && descsz == 4) {
679 uint32_t desc;
680 if (file_printf(ms, ", for DragonFly") == -1)
681 return size;
682 (void)memcpy(&desc, &nbuf[doff], sizeof(desc));
683 desc = elf_getu32(swap, desc);
684 if (file_printf(ms, " %d.%d.%d", desc / 100000,
685 desc / 10000 % 10, desc % 10000) == -1)
686 return size;
687 *flags |= FLAGS_DID_NOTE;
688 return size;
689 }
690
691core:
636private int
637do_core_note(struct magic_set *ms, unsigned char *nbuf, uint32_t type,
638 int swap, uint32_t namesz, uint32_t descsz,
639 size_t noff, size_t doff, int *flags, size_t size, int clazz)
640{
641#ifdef ELFCORE
642 int os_style = -1;
692 /*
693 * Sigh. The 2.0.36 kernel in Debian 2.1, at
694 * least, doesn't correctly implement name
695 * sections, in core dumps, as specified by
696 * the "Program Linking" section of "UNIX(R) System
697 * V Release 4 Programmer's Guide: ANSI C and
698 * Programming Support Tools", because my copy
699 * clearly says "The first 'namesz' bytes in 'name'

--- 12 unchanged lines hidden (view full) ---

712 os_style = OS_STYLE_FREEBSD;
713 }
714
715 if ((namesz >= 11 && strncmp((char *)&nbuf[noff], "NetBSD-CORE", 11)
716 == 0)) {
717 os_style = OS_STYLE_NETBSD;
718 }
719
643 /*
644 * Sigh. The 2.0.36 kernel in Debian 2.1, at
645 * least, doesn't correctly implement name
646 * sections, in core dumps, as specified by
647 * the "Program Linking" section of "UNIX(R) System
648 * V Release 4 Programmer's Guide: ANSI C and
649 * Programming Support Tools", because my copy
650 * clearly says "The first 'namesz' bytes in 'name'

--- 12 unchanged lines hidden (view full) ---

663 os_style = OS_STYLE_FREEBSD;
664 }
665
666 if ((namesz >= 11 && strncmp((char *)&nbuf[noff], "NetBSD-CORE", 11)
667 == 0)) {
668 os_style = OS_STYLE_NETBSD;
669 }
670
720#ifdef ELFCORE
721 if ((*flags & FLAGS_DID_CORE) != 0)
722 return size;
723
724 if (os_style != -1 && (*flags & FLAGS_DID_CORE_STYLE) == 0) {
725 if (file_printf(ms, ", %s-style", os_style_names[os_style])
726 == -1)
671 if (os_style != -1 && (*flags & FLAGS_DID_CORE_STYLE) == 0) {
672 if (file_printf(ms, ", %s-style", os_style_names[os_style])
673 == -1)
727 return size;
674 return 1;
728 *flags |= FLAGS_DID_CORE_STYLE;
729 }
730
731 switch (os_style) {
732 case OS_STYLE_NETBSD:
675 *flags |= FLAGS_DID_CORE_STYLE;
676 }
677
678 switch (os_style) {
679 case OS_STYLE_NETBSD:
733 if (xnh_type == NT_NETBSD_CORE_PROCINFO) {
680 if (type == NT_NETBSD_CORE_PROCINFO) {
681 char sbuf[512];
734 uint32_t signo;
735 /*
736 * Extract the program name. It is at
737 * offset 0x7c, and is up to 32-bytes,
738 * including the terminating NUL.
739 */
740 if (file_printf(ms, ", from '%.31s'",
682 uint32_t signo;
683 /*
684 * Extract the program name. It is at
685 * offset 0x7c, and is up to 32-bytes,
686 * including the terminating NUL.
687 */
688 if (file_printf(ms, ", from '%.31s'",
741 &nbuf[doff + 0x7c]) == -1)
742 return size;
689 file_printable(sbuf, sizeof(sbuf),
690 (const char *)&nbuf[doff + 0x7c])) == -1)
691 return 1;
743
744 /*
745 * Extract the signal number. It is at
746 * offset 0x08.
747 */
748 (void)memcpy(&signo, &nbuf[doff + 0x08],
749 sizeof(signo));
750 if (file_printf(ms, " (signal %u)",
751 elf_getu32(swap, signo)) == -1)
692
693 /*
694 * Extract the signal number. It is at
695 * offset 0x08.
696 */
697 (void)memcpy(&signo, &nbuf[doff + 0x08],
698 sizeof(signo));
699 if (file_printf(ms, " (signal %u)",
700 elf_getu32(swap, signo)) == -1)
752 return size;
701 return 1;
753 *flags |= FLAGS_DID_CORE;
702 *flags |= FLAGS_DID_CORE;
754 return size;
703 return 1;
755 }
756 break;
757
758 default:
704 }
705 break;
706
707 default:
759 if (xnh_type == NT_PRPSINFO && *flags & FLAGS_IS_CORE) {
708 if (type == NT_PRPSINFO && *flags & FLAGS_IS_CORE) {
760 size_t i, j;
761 unsigned char c;
762 /*
763 * Extract the program name. We assume
764 * it to be 16 characters (that's what it
765 * is in SunOS 5.x and Linux).
766 *
767 * Unfortunately, it's at a different offset

--- 51 unchanged lines hidden (view full) ---

819 /*
820 * Well, that worked.
821 */
822
823 /*
824 * Try next offsets, in case this match is
825 * in the middle of a string.
826 */
709 size_t i, j;
710 unsigned char c;
711 /*
712 * Extract the program name. We assume
713 * it to be 16 characters (that's what it
714 * is in SunOS 5.x and Linux).
715 *
716 * Unfortunately, it's at a different offset

--- 51 unchanged lines hidden (view full) ---

768 /*
769 * Well, that worked.
770 */
771
772 /*
773 * Try next offsets, in case this match is
774 * in the middle of a string.
775 */
827 for (k = i + 1 ; k < NOFFSETS ; k++) {
776 for (k = i + 1 ; k < NOFFSETS; k++) {
828 size_t no;
829 int adjust = 1;
830 if (prpsoffsets(k) >= prpsoffsets(i))
831 continue;
832 for (no = doff + prpsoffsets(k);
833 no < doff + prpsoffsets(i); no++)
834 adjust = adjust
835 && isprint(nbuf[no]);

--- 8 unchanged lines hidden (view full) ---

844 /*
845 * Linux apparently appends a space at the end
846 * of the command line: remove it.
847 */
848 while (cp > cname && isspace(cp[-1]))
849 cp--;
850 if (file_printf(ms, ", from '%.*s'",
851 (int)(cp - cname), cname) == -1)
777 size_t no;
778 int adjust = 1;
779 if (prpsoffsets(k) >= prpsoffsets(i))
780 continue;
781 for (no = doff + prpsoffsets(k);
782 no < doff + prpsoffsets(i); no++)
783 adjust = adjust
784 && isprint(nbuf[no]);

--- 8 unchanged lines hidden (view full) ---

793 /*
794 * Linux apparently appends a space at the end
795 * of the command line: remove it.
796 */
797 while (cp > cname && isspace(cp[-1]))
798 cp--;
799 if (file_printf(ms, ", from '%.*s'",
800 (int)(cp - cname), cname) == -1)
852 return size;
801 return 1;
853 *flags |= FLAGS_DID_CORE;
802 *flags |= FLAGS_DID_CORE;
854 return size;
803 return 1;
855
856 tryanother:
857 ;
858 }
859 }
860 break;
861 }
862#endif
804
805 tryanother:
806 ;
807 }
808 }
809 break;
810 }
811#endif
812 return 0;
813}
814
815private size_t
816donote(struct magic_set *ms, void *vbuf, size_t offset, size_t size,
817 int clazz, int swap, size_t align, int *flags, uint16_t *notecount)
818{
819 Elf32_Nhdr nh32;
820 Elf64_Nhdr nh64;
821 size_t noff, doff;
822 uint32_t namesz, descsz;
823 unsigned char *nbuf = CAST(unsigned char *, vbuf);
824
825 if (*notecount == 0)
826 return 0;
827 --*notecount;
828
829 if (xnh_sizeof + offset > size) {
830 /*
831 * We're out of note headers.
832 */
833 return xnh_sizeof + offset;
834 }
835
836 (void)memcpy(xnh_addr, &nbuf[offset], xnh_sizeof);
837 offset += xnh_sizeof;
838
839 namesz = xnh_namesz;
840 descsz = xnh_descsz;
841 if ((namesz == 0) && (descsz == 0)) {
842 /*
843 * We're out of note headers.
844 */
845 return (offset >= size) ? offset : size;
846 }
847
848 if (namesz & 0x80000000) {
849 (void)file_printf(ms, ", bad note name size 0x%lx",
850 (unsigned long)namesz);
851 return 0;
852 }
853
854 if (descsz & 0x80000000) {
855 (void)file_printf(ms, ", bad note description size 0x%lx",
856 (unsigned long)descsz);
857 return 0;
858 }
859
860 noff = offset;
861 doff = ELF_ALIGN(offset + namesz);
862
863 if (offset + namesz > size) {
864 /*
865 * We're past the end of the buffer.
866 */
867 return doff;
868 }
869
870 offset = ELF_ALIGN(doff + descsz);
871 if (doff + descsz > size) {
872 /*
873 * We're past the end of the buffer.
874 */
875 return (offset >= size) ? offset : size;
876 }
877
878 if ((*flags & FLAGS_DID_OS_NOTE) == 0) {
879 if (do_os_note(ms, nbuf, xnh_type, swap,
880 namesz, descsz, noff, doff, flags))
881 return size;
882 }
883
884 if ((*flags & FLAGS_DID_BUILD_ID) == 0) {
885 if (do_bid_note(ms, nbuf, xnh_type, swap,
886 namesz, descsz, noff, doff, flags))
887 return size;
888 }
889
890 if ((*flags & FLAGS_DID_NETBSD_PAX) == 0) {
891 if (do_pax_note(ms, nbuf, xnh_type, swap,
892 namesz, descsz, noff, doff, flags))
893 return size;
894 }
895
896 if ((*flags & FLAGS_DID_CORE) == 0) {
897 if (do_core_note(ms, nbuf, xnh_type, swap,
898 namesz, descsz, noff, doff, flags, size, clazz))
899 return size;
900 }
901
902 if (namesz == 7 && strcmp((char *)&nbuf[noff], "NetBSD") == 0) {
903 if (descsz > 100)
904 descsz = 100;
905 switch (xnh_type) {
906 case NT_NETBSD_VERSION:
907 return size;
908 case NT_NETBSD_MARCH:
909 if (*flags & FLAGS_DID_NETBSD_MARCH)
910 return size;
911 *flags |= FLAGS_DID_NETBSD_MARCH;
912 if (file_printf(ms, ", compiled for: %.*s",
913 (int)descsz, (const char *)&nbuf[doff]) == -1)
914 return size;
915 break;
916 case NT_NETBSD_CMODEL:
917 if (*flags & FLAGS_DID_NETBSD_CMODEL)
918 return size;
919 *flags |= FLAGS_DID_NETBSD_CMODEL;
920 if (file_printf(ms, ", compiler model: %.*s",
921 (int)descsz, (const char *)&nbuf[doff]) == -1)
922 return size;
923 break;
924 default:
925 if (*flags & FLAGS_DID_NETBSD_UNKNOWN)
926 return size;
927 *flags |= FLAGS_DID_NETBSD_UNKNOWN;
928 if (file_printf(ms, ", note=%u", xnh_type) == -1)
929 return size;
930 break;
931 }
932 return size;
933 }
934
863 return offset;
864}
865
866/* SunOS 5.x hardware capability descriptions */
867typedef struct cap_desc {
868 uint64_t cd_mask;
869 const char *cd_name;
870} cap_desc_t;

--- 39 unchanged lines hidden (view full) ---

910 { AV_386_SSSE3, "SSSE3" },
911 { AV_386_SSE4_1, "SSE4.1" },
912 { AV_386_SSE4_2, "SSE4.2" },
913 { 0, NULL }
914};
915
916private int
917doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num,
935 return offset;
936}
937
938/* SunOS 5.x hardware capability descriptions */
939typedef struct cap_desc {
940 uint64_t cd_mask;
941 const char *cd_name;
942} cap_desc_t;

--- 39 unchanged lines hidden (view full) ---

982 { AV_386_SSSE3, "SSSE3" },
983 { AV_386_SSE4_1, "SSE4.1" },
984 { AV_386_SSE4_2, "SSE4.2" },
985 { 0, NULL }
986};
987
988private int
989doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num,
918 size_t size, off_t fsize, int *flags, int mach, int strtab)
990 size_t size, off_t fsize, int mach, int strtab, int *flags,
991 uint16_t *notecount)
919{
920 Elf32_Shdr sh32;
921 Elf64_Shdr sh64;
922 int stripped = 1;
923 size_t nbadcap = 0;
924 void *nbuf;
925 off_t noff, coff, name_off;
926 uint64_t cap_hw1 = 0; /* SunOS 5.x hardware capabilites */
927 uint64_t cap_sf1 = 0; /* SunOS 5.x software capabilites */
928 char name[50];
992{
993 Elf32_Shdr sh32;
994 Elf64_Shdr sh64;
995 int stripped = 1;
996 size_t nbadcap = 0;
997 void *nbuf;
998 off_t noff, coff, name_off;
999 uint64_t cap_hw1 = 0; /* SunOS 5.x hardware capabilites */
1000 uint64_t cap_sf1 = 0; /* SunOS 5.x software capabilites */
1001 char name[50];
1002 ssize_t namesize;
929
930 if (size != xsh_sizeof) {
931 if (file_printf(ms, ", corrupted section header size") == -1)
932 return -1;
933 return 0;
934 }
935
936 /* Read offset of name section to be able to read section names later */
1003
1004 if (size != xsh_sizeof) {
1005 if (file_printf(ms, ", corrupted section header size") == -1)
1006 return -1;
1007 return 0;
1008 }
1009
1010 /* Read offset of name section to be able to read section names later */
937 if (pread(fd, xsh_addr, xsh_sizeof, off + size * strtab) == -1) {
1011 if (pread(fd, xsh_addr, xsh_sizeof, off + size * strtab) < (ssize_t)xsh_sizeof) {
938 file_badread(ms);
939 return -1;
940 }
941 name_off = xsh_offset;
942
943 for ( ; num; num--) {
944 /* Read the name of this section. */
1012 file_badread(ms);
1013 return -1;
1014 }
1015 name_off = xsh_offset;
1016
1017 for ( ; num; num--) {
1018 /* Read the name of this section. */
945 if (pread(fd, name, sizeof(name), name_off + xsh_name) == -1) {
1019 if ((namesize = pread(fd, name, sizeof(name) - 1, name_off + xsh_name)) == -1) {
946 file_badread(ms);
947 return -1;
948 }
1020 file_badread(ms);
1021 return -1;
1022 }
949 name[sizeof(name) - 1] = '\0';
1023 name[namesize] = '\0';
950 if (strcmp(name, ".debug_info") == 0)
951 stripped = 0;
952
1024 if (strcmp(name, ".debug_info") == 0)
1025 stripped = 0;
1026
953 if (pread(fd, xsh_addr, xsh_sizeof, off) == -1) {
1027 if (pread(fd, xsh_addr, xsh_sizeof, off) < (ssize_t)xsh_sizeof) {
954 file_badread(ms);
955 return -1;
956 }
957 off += size;
958
959 /* Things we can determine before we seek */
960 switch (xsh_type) {
961 case SHT_SYMTAB:

--- 13 unchanged lines hidden (view full) ---

975 /* Things we can determine when we seek */
976 switch (xsh_type) {
977 case SHT_NOTE:
978 if ((nbuf = malloc(xsh_size)) == NULL) {
979 file_error(ms, errno, "Cannot allocate memory"
980 " for note");
981 return -1;
982 }
1028 file_badread(ms);
1029 return -1;
1030 }
1031 off += size;
1032
1033 /* Things we can determine before we seek */
1034 switch (xsh_type) {
1035 case SHT_SYMTAB:

--- 13 unchanged lines hidden (view full) ---

1049 /* Things we can determine when we seek */
1050 switch (xsh_type) {
1051 case SHT_NOTE:
1052 if ((nbuf = malloc(xsh_size)) == NULL) {
1053 file_error(ms, errno, "Cannot allocate memory"
1054 " for note");
1055 return -1;
1056 }
983 if (pread(fd, nbuf, xsh_size, xsh_offset) == -1) {
1057 if (pread(fd, nbuf, xsh_size, xsh_offset) < (ssize_t)xsh_size) {
984 file_badread(ms);
985 free(nbuf);
986 return -1;
987 }
988
989 noff = 0;
990 for (;;) {
991 if (noff >= (off_t)xsh_size)
992 break;
993 noff = donote(ms, nbuf, (size_t)noff,
1058 file_badread(ms);
1059 free(nbuf);
1060 return -1;
1061 }
1062
1063 noff = 0;
1064 for (;;) {
1065 if (noff >= (off_t)xsh_size)
1066 break;
1067 noff = donote(ms, nbuf, (size_t)noff,
994 xsh_size, clazz, swap, 4, flags);
1068 xsh_size, clazz, swap, 4, flags, notecount);
995 if (noff == 0)
996 break;
997 }
998 free(nbuf);
999 break;
1000 case SHT_SUNW_cap:
1001 switch (mach) {
1002 case EM_SPARC:

--- 150 unchanged lines hidden (view full) ---

1153
1154/*
1155 * Look through the program headers of an executable image, searching
1156 * for a PT_INTERP section; if one is found, it's dynamically linked,
1157 * otherwise it's statically linked.
1158 */
1159private int
1160dophn_exec(struct magic_set *ms, int clazz, int swap, int fd, off_t off,
1069 if (noff == 0)
1070 break;
1071 }
1072 free(nbuf);
1073 break;
1074 case SHT_SUNW_cap:
1075 switch (mach) {
1076 case EM_SPARC:

--- 150 unchanged lines hidden (view full) ---

1227
1228/*
1229 * Look through the program headers of an executable image, searching
1230 * for a PT_INTERP section; if one is found, it's dynamically linked,
1231 * otherwise it's statically linked.
1232 */
1233private int
1234dophn_exec(struct magic_set *ms, int clazz, int swap, int fd, off_t off,
1161 int num, size_t size, off_t fsize, int *flags, int sh_num)
1235 int num, size_t size, off_t fsize, int sh_num, int *flags,
1236 uint16_t *notecount)
1162{
1163 Elf32_Phdr ph32;
1164 Elf64_Phdr ph64;
1165 const char *linking_style = "statically";
1237{
1238 Elf32_Phdr ph32;
1239 Elf64_Phdr ph64;
1240 const char *linking_style = "statically";
1166 const char *shared_libraries = "";
1241 const char *interp = "";
1167 unsigned char nbuf[BUFSIZ];
1242 unsigned char nbuf[BUFSIZ];
1243 char ibuf[BUFSIZ];
1168 ssize_t bufsize;
1169 size_t offset, align, len;
1170
1171 if (size != xph_sizeof) {
1172 if (file_printf(ms, ", corrupted program header size") == -1)
1173 return -1;
1174 return 0;
1175 }
1176
1177 for ( ; num; num--) {
1244 ssize_t bufsize;
1245 size_t offset, align, len;
1246
1247 if (size != xph_sizeof) {
1248 if (file_printf(ms, ", corrupted program header size") == -1)
1249 return -1;
1250 return 0;
1251 }
1252
1253 for ( ; num; num--) {
1178 if (pread(fd, xph_addr, xph_sizeof, off) == -1) {
1254 if (pread(fd, xph_addr, xph_sizeof, off) < (ssize_t)xph_sizeof) {
1179 file_badread(ms);
1180 return -1;
1181 }
1182
1183 off += size;
1255 file_badread(ms);
1256 return -1;
1257 }
1258
1259 off += size;
1260 bufsize = 0;
1261 align = 4;
1184
1185 /* Things we can determine before we seek */
1186 switch (xph_type) {
1187 case PT_DYNAMIC:
1188 linking_style = "dynamically";
1189 break;
1262
1263 /* Things we can determine before we seek */
1264 switch (xph_type) {
1265 case PT_DYNAMIC:
1266 linking_style = "dynamically";
1267 break;
1268 case PT_NOTE:
1269 if (sh_num) /* Did this through section headers */
1270 continue;
1271 if (((align = xph_align) & 0x80000000UL) != 0 ||
1272 align < 4) {
1273 if (file_printf(ms,
1274 ", invalid note alignment 0x%lx",
1275 (unsigned long)align) == -1)
1276 return -1;
1277 align = 4;
1278 }
1279 /*FALLTHROUGH*/
1190 case PT_INTERP:
1280 case PT_INTERP:
1191 shared_libraries = " (uses shared libs)";
1281 len = xph_filesz < sizeof(nbuf) ? xph_filesz
1282 : sizeof(nbuf);
1283 bufsize = pread(fd, nbuf, len, xph_offset);
1284 if (bufsize == -1) {
1285 file_badread(ms);
1286 return -1;
1287 }
1192 break;
1193 default:
1194 if (fsize != SIZE_UNKNOWN && xph_offset > fsize) {
1195 /* Maybe warn here? */
1196 continue;
1197 }
1198 break;
1199 }
1200
1201 /* Things we can determine when we seek */
1202 switch (xph_type) {
1288 break;
1289 default:
1290 if (fsize != SIZE_UNKNOWN && xph_offset > fsize) {
1291 /* Maybe warn here? */
1292 continue;
1293 }
1294 break;
1295 }
1296
1297 /* Things we can determine when we seek */
1298 switch (xph_type) {
1299 case PT_INTERP:
1300 if (bufsize && nbuf[0]) {
1301 nbuf[bufsize - 1] = '\0';
1302 interp = (const char *)nbuf;
1303 } else
1304 interp = "*empty*";
1305 break;
1203 case PT_NOTE:
1306 case PT_NOTE:
1204 if (((align = xph_align) & 0x80000000UL) != 0 ||
1205 align < 4) {
1206 if (file_printf(ms,
1207 ", invalid note alignment 0x%lx",
1208 (unsigned long)align) == -1)
1209 return -1;
1210 align = 4;
1211 }
1212 if (sh_num)
1213 break;
1214 /*
1215 * This is a PT_NOTE section; loop through all the notes
1216 * in the section.
1217 */
1307 /*
1308 * This is a PT_NOTE section; loop through all the notes
1309 * in the section.
1310 */
1218 len = xph_filesz < sizeof(nbuf) ? xph_filesz
1219 : sizeof(nbuf);
1220 bufsize = pread(fd, nbuf, len, xph_offset);
1221 if (bufsize == -1) {
1222 file_badread(ms);
1223 return -1;
1224 }
1225 offset = 0;
1226 for (;;) {
1227 if (offset >= (size_t)bufsize)
1228 break;
1229 offset = donote(ms, nbuf, offset,
1230 (size_t)bufsize, clazz, swap, align,
1311 offset = 0;
1312 for (;;) {
1313 if (offset >= (size_t)bufsize)
1314 break;
1315 offset = donote(ms, nbuf, offset,
1316 (size_t)bufsize, clazz, swap, align,
1231 flags);
1317 flags, notecount);
1232 if (offset == 0)
1233 break;
1234 }
1235 break;
1236 default:
1237 break;
1238 }
1239 }
1318 if (offset == 0)
1319 break;
1320 }
1321 break;
1322 default:
1323 break;
1324 }
1325 }
1240 if (file_printf(ms, ", %s linked%s", linking_style, shared_libraries)
1326 if (file_printf(ms, ", %s linked", linking_style)
1241 == -1)
1327 == -1)
1242 return -1;
1328 return -1;
1329 if (interp[0])
1330 if (file_printf(ms, ", interpreter %s",
1331 file_printable(ibuf, sizeof(ibuf), interp)) == -1)
1332 return -1;
1243 return 0;
1244}
1245
1246
1247protected int
1248file_tryelf(struct magic_set *ms, int fd, const unsigned char *buf,
1249 size_t nbytes)
1250{
1251 union {
1252 int32_t l;
1253 char c[sizeof (int32_t)];
1254 } u;
1255 int clazz;
1256 int swap;
1257 struct stat st;
1258 off_t fsize;
1259 int flags = 0;
1260 Elf32_Ehdr elf32hdr;
1261 Elf64_Ehdr elf64hdr;
1333 return 0;
1334}
1335
1336
1337protected int
1338file_tryelf(struct magic_set *ms, int fd, const unsigned char *buf,
1339 size_t nbytes)
1340{
1341 union {
1342 int32_t l;
1343 char c[sizeof (int32_t)];
1344 } u;
1345 int clazz;
1346 int swap;
1347 struct stat st;
1348 off_t fsize;
1349 int flags = 0;
1350 Elf32_Ehdr elf32hdr;
1351 Elf64_Ehdr elf64hdr;
1262 uint16_t type, phnum, shnum;
1352 uint16_t type, phnum, shnum, notecount;
1263
1264 if (ms->flags & (MAGIC_MIME|MAGIC_APPLE))
1265 return 0;
1266 /*
1267 * ELF executables have multiple section headers in arbitrary
1268 * file locations and thus file(1) cannot determine it from easily.
1269 * Instead we traverse thru all section headers until a symbol table
1270 * one is found or else the binary is stripped.

--- 45 unchanged lines hidden --- 		1353
1354 if (ms->flags & (MAGIC_MIME|MAGIC_APPLE))
1355 return 0;
1356 /*
1357 * ELF executables have multiple section headers in arbitrary
1358 * file locations and thus file(1) cannot determine it from easily.
1359 * Instead we traverse thru all section headers until a symbol table
1360 * one is found or else the binary is stripped.

--- 45 unchanged lines hidden ---