2 * Copyright (c) Christos Zoulas 2003.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
30 FILE_RCSID("@(#)$File: readelf.c,v 1.81 2008/11/04 16:38:28 christos Exp $")
45 private int dophn_core(struct magic_set *, int, int, int, off_t, int, size_t,
48 private int dophn_exec(struct magic_set *, int, int, int, off_t, int, size_t,
50 private int doshn(struct magic_set *, int, int, int, off_t, int, size_t, int *,
52 private size_t donote(struct magic_set *, void *, size_t, size_t, int,
55 #define ELF_ALIGN(a) ((((a) + align - 1) / align) * align)
57 #define isquote(c) (strchr("'\"`", (c)) != NULL)
59 private uint16_t getu16(int, uint16_t);
60 private uint32_t getu32(int, uint32_t);
61 private uint64_t getu64(int, uint64_t);
64 getu16(int swap, uint16_t value)
74 retval.c[0] = tmpval.c[1];
75 retval.c[1] = tmpval.c[0];
83 getu32(int swap, uint32_t value)
93 retval.c[0] = tmpval.c[3];
94 retval.c[1] = tmpval.c[2];
95 retval.c[2] = tmpval.c[1];
96 retval.c[3] = tmpval.c[0];
104 getu64(int swap, uint64_t value)
114 retval.c[0] = tmpval.c[7];
115 retval.c[1] = tmpval.c[6];
116 retval.c[2] = tmpval.c[5];
117 retval.c[3] = tmpval.c[4];
118 retval.c[4] = tmpval.c[3];
119 retval.c[5] = tmpval.c[2];
120 retval.c[6] = tmpval.c[1];
121 retval.c[7] = tmpval.c[0];
128 #define elf_getu16(swap, value) getu16(swap, value)
129 #define elf_getu32(swap, value) getu32(swap, value)
130 #ifdef USE_ARRAY_FOR_64BIT_TYPES
131 # define elf_getu64(swap, array) \
132 ((swap ? ((uint64_t)elf_getu32(swap, array[0])) << 32 : elf_getu32(swap, array[0])) + \
133 (swap ? elf_getu32(swap, array[1]) : ((uint64_t)elf_getu32(swap, array[1]) << 32)))
135 # define elf_getu64(swap, value) getu64(swap, value)
138 #define xsh_addr (clazz == ELFCLASS32 \
141 #define xsh_sizeof (clazz == ELFCLASS32 \
144 #define xsh_size (clazz == ELFCLASS32 \
145 ? elf_getu32(swap, sh32.sh_size) \
146 : elf_getu64(swap, sh64.sh_size))
147 #define xsh_offset (clazz == ELFCLASS32 \
148 ? elf_getu32(swap, sh32.sh_offset) \
149 : elf_getu64(swap, sh64.sh_offset))
150 #define xsh_type (clazz == ELFCLASS32 \
151 ? elf_getu32(swap, sh32.sh_type) \
152 : elf_getu32(swap, sh64.sh_type))
153 #define xph_addr (clazz == ELFCLASS32 \
156 #define xph_sizeof (clazz == ELFCLASS32 \
159 #define xph_type (clazz == ELFCLASS32 \
160 ? elf_getu32(swap, ph32.p_type) \
161 : elf_getu32(swap, ph64.p_type))
162 #define xph_offset (off_t)(clazz == ELFCLASS32 \
163 ? elf_getu32(swap, ph32.p_offset) \
164 : elf_getu64(swap, ph64.p_offset))
165 #define xph_align (size_t)((clazz == ELFCLASS32 \
166 ? (off_t) (ph32.p_align ? \
167 elf_getu32(swap, ph32.p_align) : 4) \
168 : (off_t) (ph64.p_align ? \
169 elf_getu64(swap, ph64.p_align) : 4)))
170 #define xph_filesz (size_t)((clazz == ELFCLASS32 \
171 ? elf_getu32(swap, ph32.p_filesz) \
172 : elf_getu64(swap, ph64.p_filesz)))
173 #define xnh_addr (clazz == ELFCLASS32 \
176 #define xph_memsz (size_t)((clazz == ELFCLASS32 \
177 ? elf_getu32(swap, ph32.p_memsz) \
178 : elf_getu64(swap, ph64.p_memsz)))
179 #define xnh_sizeof (clazz == ELFCLASS32 \
182 #define xnh_type (clazz == ELFCLASS32 \
183 ? elf_getu32(swap, nh32.n_type) \
184 : elf_getu32(swap, nh64.n_type))
185 #define xnh_namesz (clazz == ELFCLASS32 \
186 ? elf_getu32(swap, nh32.n_namesz) \
187 : elf_getu32(swap, nh64.n_namesz))
188 #define xnh_descsz (clazz == ELFCLASS32 \
189 ? elf_getu32(swap, nh32.n_descsz) \
190 : elf_getu32(swap, nh64.n_descsz))
191 #define prpsoffsets(i) (clazz == ELFCLASS32 \
194 #define xcap_addr (clazz == ELFCLASS32 \
197 #define xcap_sizeof (clazz == ELFCLASS32 \
200 #define xcap_tag (clazz == ELFCLASS32 \
201 ? elf_getu32(swap, cap32.c_tag) \
202 : elf_getu64(swap, cap64.c_tag))
203 #define xcap_val (clazz == ELFCLASS32 \
204 ? elf_getu32(swap, cap32.c_un.c_val) \
205 : elf_getu64(swap, cap64.c_un.c_val))
209 * Try larger offsets first to avoid false matches
210 * from earlier data that happen to look like strings.
212 static const size_t prpsoffsets32[] = {
214 104, /* SunOS 5.x (command line) */
215 88, /* SunOS 5.x (short name) */
216 #endif /* USE_NT_PSINFO */
218 100, /* SunOS 5.x (command line) */
219 84, /* SunOS 5.x (short name) */
221 44, /* Linux (command line) */
222 28, /* Linux 2.0.36 (short name) */
227 static const size_t prpsoffsets64[] = {
229 152, /* SunOS 5.x (command line) */
230 136, /* SunOS 5.x (short name) */
231 #endif /* USE_NT_PSINFO */
233 136, /* SunOS 5.x, 64-bit (command line) */
234 120, /* SunOS 5.x, 64-bit (short name) */
236 56, /* Linux (command line) */
237 40, /* Linux (tested on core from 2.4.x, short name) */
239 16, /* FreeBSD, 64-bit */
242 #define NOFFSETS32 (sizeof prpsoffsets32 / sizeof prpsoffsets32[0])
243 #define NOFFSETS64 (sizeof prpsoffsets64 / sizeof prpsoffsets64[0])
245 #define NOFFSETS (clazz == ELFCLASS32 ? NOFFSETS32 : NOFFSETS64)
248 * Look through the program headers of an executable image, searching
249 * for a PT_NOTE section of type NT_PRPSINFO, with a name "CORE" or
250 * "FreeBSD"; if one is found, try looking in various places in its
251 * contents for a 16-character string containing only printable
252 * characters - if found, that string should be the name of the program
253 * that dropped core. Note: right after that 16-character string is,
254 * at least in SunOS 5.x (and possibly other SVR4-flavored systems) and
255 * Linux, a longer string (80 characters, in 5.x, probably other
256 * SVR4-flavored systems, and Linux) containing the start of the
257 * command line for that program.
259 * SunOS 5.x core files contain two PT_NOTE sections, with the types
260 * NT_PRPSINFO (old) and NT_PSINFO (new). These structs contain the
261 * same info about the command name and command line, so it probably
262 * isn't worthwhile to look for NT_PSINFO, but the offsets are provided
263 * above (see USE_NT_PSINFO), in case we ever decide to do so. The
264 * NT_PRPSINFO and NT_PSINFO sections are always in order and adjacent;
265 * the SunOS 5.x file command relies on this (and prefers the latter).
267 * The signal number probably appears in a section of type NT_PRSTATUS,
268 * but that's also rather OS-dependent, in ways that are harder to
269 * dissect with heuristics, so I'm not bothering with the signal number.
270 * (I suppose the signal number could be of interest in situations where
271 * you don't have the binary of the program that dropped core; if you
272 * *do* have that binary, the debugger will probably tell you what
276 #define OS_STYLE_SVR4 0
277 #define OS_STYLE_FREEBSD 1
278 #define OS_STYLE_NETBSD 2
280 private const char os_style_names[][8] = {
286 #define FLAGS_DID_CORE 1
287 #define FLAGS_DID_NOTE 2
288 #define FLAGS_DID_CORE_STYLE 4
291 dophn_core(struct magic_set *ms, int clazz, int swap, int fd, off_t off,
292 int num, size_t size, off_t fsize, int *flags)
297 unsigned char nbuf[BUFSIZ];
302 if (fstat(fd, &st) < 0) {
307 if (size != xph_sizeof) {
308 if (file_printf(ms, ", corrupted program header size") == -1)
314 * Loop through all the program headers.
316 for ( ; num; num--) {
317 if ((savedoffset = lseek(fd, off, SEEK_SET)) == (off_t)-1) {
321 if (read(fd, xph_addr, xph_sizeof) == -1) {
325 if (xph_offset > fsize) {
326 if (lseek(fd, savedoffset, SEEK_SET) == (off_t)-1) {
334 if (xph_type != PT_NOTE)
338 * This is a PT_NOTE section; loop through all the notes
341 if (lseek(fd, xph_offset, SEEK_SET) == (off_t)-1) {
345 bufsize = read(fd, nbuf,
346 ((xph_filesz < sizeof(nbuf)) ? xph_filesz : sizeof(nbuf)));
353 if (offset >= (size_t)bufsize)
355 offset = donote(ms, nbuf, offset, (size_t)bufsize,
356 clazz, swap, 4, flags);
367 donote(struct magic_set *ms, void *vbuf, size_t offset, size_t size,
368 int clazz, int swap, size_t align, int *flags)
376 uint32_t namesz, descsz;
377 unsigned char *nbuf = CAST(unsigned char *, vbuf);
379 (void)memcpy(xnh_addr, &nbuf[offset], xnh_sizeof);
380 offset += xnh_sizeof;
384 if ((namesz == 0) && (descsz == 0)) {
386 * We're out of note headers.
388 return (offset >= size) ? offset : size;
391 if (namesz & 0x80000000) {
392 (void)file_printf(ms, ", bad note name size 0x%lx",
393 (unsigned long)namesz);
397 if (descsz & 0x80000000) {
398 (void)file_printf(ms, ", bad note description size 0x%lx",
399 (unsigned long)descsz);
405 doff = ELF_ALIGN(offset + namesz);
407 if (offset + namesz > size) {
409 * We're past the end of the buffer.
414 offset = ELF_ALIGN(doff + descsz);
415 if (doff + descsz > size) {
417 * We're past the end of the buffer.
419 return (offset >= size) ? offset : size;
422 if (*flags & FLAGS_DID_NOTE)
425 if (namesz == 4 && strcmp((char *)&nbuf[noff], "GNU") == 0 &&
426 xnh_type == NT_GNU_VERSION && descsz == 16) {
428 (void)memcpy(desc, &nbuf[doff], sizeof(desc));
430 if (file_printf(ms, ", for GNU/") == -1)
432 switch (elf_getu32(swap, desc[0])) {
434 if (file_printf(ms, "Linux") == -1)
438 if (file_printf(ms, "Hurd") == -1)
442 if (file_printf(ms, "Solaris") == -1)
445 case GNU_OS_KFREEBSD:
446 if (file_printf(ms, "kFreeBSD") == -1)
450 if (file_printf(ms, "kNetBSD") == -1)
454 if (file_printf(ms, "<unknown>") == -1)
457 if (file_printf(ms, " %d.%d.%d", elf_getu32(swap, desc[1]),
458 elf_getu32(swap, desc[2]), elf_getu32(swap, desc[3])) == -1)
460 *flags |= FLAGS_DID_NOTE;
464 if (namesz == 7 && strcmp((char *)&nbuf[noff], "NetBSD") == 0 &&
465 xnh_type == NT_NETBSD_VERSION && descsz == 4) {
467 (void)memcpy(&desc, &nbuf[doff], sizeof(desc));
468 desc = elf_getu32(swap, desc);
470 if (file_printf(ms, ", for NetBSD") == -1)
473 * The version number used to be stuck as 199905, and was thus
474 * basically content-free. Newer versions of NetBSD have fixed
475 * this and now use the encoding of __NetBSD_Version__:
481 * r = release ["",A-Z,Z[A-Z] but numeric]
484 if (desc > 100000000U) {
485 uint32_t ver_patch = (desc / 100) % 100;
486 uint32_t ver_rel = (desc / 10000) % 100;
487 uint32_t ver_min = (desc / 1000000) % 100;
488 uint32_t ver_maj = desc / 100000000;
490 if (file_printf(ms, " %u.%u", ver_maj, ver_min) == -1)
492 if (ver_rel == 0 && ver_patch != 0) {
493 if (file_printf(ms, ".%u", ver_patch) == -1)
495 } else if (ver_rel != 0) {
496 while (ver_rel > 26) {
497 if (file_printf(ms, "Z") == -1)
501 if (file_printf(ms, "%c", 'A' + ver_rel - 1)
506 *flags |= FLAGS_DID_NOTE;
510 if (namesz == 8 && strcmp((char *)&nbuf[noff], "FreeBSD") == 0 &&
511 xnh_type == NT_FREEBSD_VERSION && descsz == 4) {
513 (void)memcpy(&desc, &nbuf[doff], sizeof(desc));
514 desc = elf_getu32(swap, desc);
515 if (file_printf(ms, ", for FreeBSD") == -1)
519 * Contents is __FreeBSD_version, whose relation to OS
520 * versions is defined by a huge table in the Porter's
521 * Handbook. This is the general scheme:
524 * Mmp000 (before 4.10)
525 * Mmi0p0 (before 5.0)
528 * Development branches:
529 * Mmpxxx (before 4.6)
530 * Mmp1xx (before 4.10)
531 * Mmi1xx (before 5.0)
537 * i = minor version increment (491000 -> 4.10)
541 * The first release of FreeBSD to use ELF by default
544 if (desc == 460002) {
545 if (file_printf(ms, " 4.6.2") == -1)
547 } else if (desc < 460100) {
548 if (file_printf(ms, " %d.%d", desc / 100000,
549 desc / 10000 % 10) == -1)
551 if (desc / 1000 % 10 > 0)
552 if (file_printf(ms, ".%d", desc / 1000 % 10)
555 if ((desc % 1000 > 0) || (desc % 100000 == 0))
556 if (file_printf(ms, " (%d)", desc) == -1)
558 } else if (desc < 500000) {
559 if (file_printf(ms, " %d.%d", desc / 100000,
560 desc / 10000 % 10 + desc / 1000 % 10) == -1)
562 if (desc / 100 % 10 > 0) {
563 if (file_printf(ms, " (%d)", desc) == -1)
565 } else if (desc / 10 % 10 > 0) {
566 if (file_printf(ms, ".%d", desc / 10 % 10)
571 if (file_printf(ms, " %d.%d", desc / 100000,
572 desc / 1000 % 100) == -1)
574 if ((desc / 100 % 10 > 0) ||
575 (desc % 100000 / 100 == 0)) {
576 if (file_printf(ms, " (%d)", desc) == -1)
578 } else if (desc / 10 % 10 > 0) {
579 if (file_printf(ms, ".%d", desc / 10 % 10)
584 *flags |= FLAGS_DID_NOTE;
588 if (namesz == 8 && strcmp((char *)&nbuf[noff], "OpenBSD") == 0 &&
589 xnh_type == NT_OPENBSD_VERSION && descsz == 4) {
590 if (file_printf(ms, ", for OpenBSD") == -1)
592 /* Content of note is always 0 */
593 *flags |= FLAGS_DID_NOTE;
597 if (namesz == 10 && strcmp((char *)&nbuf[noff], "DragonFly") == 0 &&
598 xnh_type == NT_DRAGONFLY_VERSION && descsz == 4) {
600 if (file_printf(ms, ", for DragonFly") == -1)
602 (void)memcpy(&desc, &nbuf[doff], sizeof(desc));
603 desc = elf_getu32(swap, desc);
604 if (file_printf(ms, " %d.%d.%d", desc / 100000,
605 desc / 10000 % 10, desc % 10000) == -1)
607 *flags |= FLAGS_DID_NOTE;
613 * Sigh. The 2.0.36 kernel in Debian 2.1, at
614 * least, doesn't correctly implement name
615 * sections, in core dumps, as specified by
616 * the "Program Linking" section of "UNIX(R) System
617 * V Release 4 Programmer's Guide: ANSI C and
618 * Programming Support Tools", because my copy
619 * clearly says "The first 'namesz' bytes in 'name'
620 * contain a *null-terminated* [emphasis mine]
621 * character representation of the entry's owner
622 * or originator", but the 2.0.36 kernel code
623 * doesn't include the terminating null in the
626 if ((namesz == 4 && strncmp((char *)&nbuf[noff], "CORE", 4) == 0) ||
627 (namesz == 5 && strcmp((char *)&nbuf[noff], "CORE") == 0)) {
628 os_style = OS_STYLE_SVR4;
631 if ((namesz == 8 && strcmp((char *)&nbuf[noff], "FreeBSD") == 0)) {
632 os_style = OS_STYLE_FREEBSD;
635 if ((namesz >= 11 && strncmp((char *)&nbuf[noff], "NetBSD-CORE", 11)
637 os_style = OS_STYLE_NETBSD;
641 if ((*flags & FLAGS_DID_CORE) != 0)
644 if (os_style != -1 && (*flags & FLAGS_DID_CORE_STYLE) == 0) {
645 if (file_printf(ms, ", %s-style", os_style_names[os_style])
648 *flags |= FLAGS_DID_CORE_STYLE;
652 case OS_STYLE_NETBSD:
653 if (xnh_type == NT_NETBSD_CORE_PROCINFO) {
656 * Extract the program name. It is at
657 * offset 0x7c, and is up to 32-bytes,
658 * including the terminating NUL.
660 if (file_printf(ms, ", from '%.31s'",
661 &nbuf[doff + 0x7c]) == -1)
665 * Extract the signal number. It is at
668 (void)memcpy(&signo, &nbuf[doff + 0x08],
670 if (file_printf(ms, " (signal %u)",
671 elf_getu32(swap, signo)) == -1)
673 *flags |= FLAGS_DID_CORE;
679 if (xnh_type == NT_PRPSINFO) {
683 * Extract the program name. We assume
684 * it to be 16 characters (that's what it
685 * is in SunOS 5.x and Linux).
687 * Unfortunately, it's at a different offset
688 * in various OSes, so try multiple offsets.
689 * If the characters aren't all printable,
692 for (i = 0; i < NOFFSETS; i++) {
693 unsigned char *cname, *cp;
694 size_t reloffset = prpsoffsets(i);
695 size_t noffset = doff + reloffset;
696 for (j = 0; j < 16; j++, noffset++,
699 * Make sure we're not past
700 * the end of the buffer; if
701 * we are, just give up.
707 * Make sure we're not past
708 * the end of the contents;
709 * if we are, this obviously
710 * isn't the right offset.
712 if (reloffset >= descsz)
734 if (!isprint(c) || isquote(c))
741 cname = (unsigned char *)
742 &nbuf[doff + prpsoffsets(i)];
743 for (cp = cname; *cp && isprint(*cp); cp++)
746 * Linux apparently appends a space at the end
747 * of the command line: remove it.
749 while (cp > cname && isspace(cp[-1]))
751 if (file_printf(ms, ", from '%.*s'",
752 (int)(cp - cname), cname) == -1)
754 *flags |= FLAGS_DID_CORE;
767 /* SunOS 5.x hardware capability descriptions */
768 typedef struct cap_desc {
773 static const cap_desc_t cap_desc_sparc[] = {
774 { AV_SPARC_MUL32, "MUL32" },
775 { AV_SPARC_DIV32, "DIV32" },
776 { AV_SPARC_FSMULD, "FSMULD" },
777 { AV_SPARC_V8PLUS, "V8PLUS" },
778 { AV_SPARC_POPC, "POPC" },
779 { AV_SPARC_VIS, "VIS" },
780 { AV_SPARC_VIS2, "VIS2" },
781 { AV_SPARC_ASI_BLK_INIT, "ASI_BLK_INIT" },
782 { AV_SPARC_FMAF, "FMAF" },
783 { AV_SPARC_FJFMAU, "FJFMAU" },
784 { AV_SPARC_IMA, "IMA" },
788 static const cap_desc_t cap_desc_386[] = {
789 { AV_386_FPU, "FPU" },
790 { AV_386_TSC, "TSC" },
791 { AV_386_CX8, "CX8" },
792 { AV_386_SEP, "SEP" },
793 { AV_386_AMD_SYSC, "AMD_SYSC" },
794 { AV_386_CMOV, "CMOV" },
795 { AV_386_MMX, "MMX" },
796 { AV_386_AMD_MMX, "AMD_MMX" },
797 { AV_386_AMD_3DNow, "AMD_3DNow" },
798 { AV_386_AMD_3DNowx, "AMD_3DNowx" },
799 { AV_386_FXSR, "FXSR" },
800 { AV_386_SSE, "SSE" },
801 { AV_386_SSE2, "SSE2" },
802 { AV_386_PAUSE, "PAUSE" },
803 { AV_386_SSE3, "SSE3" },
804 { AV_386_MON, "MON" },
805 { AV_386_CX16, "CX16" },
806 { AV_386_AHF, "AHF" },
807 { AV_386_TSCP, "TSCP" },
808 { AV_386_AMD_SSE4A, "AMD_SSE4A" },
809 { AV_386_POPCNT, "POPCNT" },
810 { AV_386_AMD_LZCNT, "AMD_LZCNT" },
811 { AV_386_SSSE3, "SSSE3" },
812 { AV_386_SSE4_1, "SSE4.1" },
813 { AV_386_SSE4_2, "SSE4.2" },
818 doshn(struct magic_set *ms, int clazz, int swap, int fd, off_t off, int num,
819 size_t size, int *flags, int mach)
826 uint64_t cap_hw1 = 0; /* SunOS 5.x hardware capabilites */
827 uint64_t cap_sf1 = 0; /* SunOS 5.x software capabilites */
829 if (size != xsh_sizeof) {
830 if (file_printf(ms, ", corrupted section header size") == -1)
835 if (lseek(fd, off, SEEK_SET) == (off_t)-1) {
840 for ( ; num; num--) {
841 if (read(fd, xsh_addr, xsh_sizeof) == -1) {
853 if ((off = lseek(fd, (off_t)0, SEEK_CUR)) ==
858 if ((nbuf = malloc((size_t)xsh_size)) == NULL) {
859 file_error(ms, errno, "Cannot allocate memory"
863 if ((noff = lseek(fd, (off_t)xsh_offset, SEEK_SET)) ==
869 if (read(fd, nbuf, (size_t)xsh_size) !=
878 if (noff >= (off_t)xsh_size)
880 noff = donote(ms, nbuf, (size_t)noff,
881 (size_t)xsh_size, clazz, swap, 4,
886 if ((lseek(fd, off, SEEK_SET)) == (off_t)-1) {
896 if ((off = lseek(fd, (off_t)0, SEEK_CUR)) ==
901 if (lseek(fd, (off_t)xsh_offset, SEEK_SET) ==
910 char cbuf[/*CONSTCOND*/
911 MAX(sizeof cap32, sizeof cap64)];
912 if ((coff += xcap_sizeof) >= (off_t)xsh_size)
914 if (read(fd, cbuf, (size_t)xcap_sizeof) !=
915 (ssize_t)xcap_sizeof) {
919 (void)memcpy(xcap_addr, cbuf, xcap_sizeof);
931 ", with unknown capability "
933 (unsigned long long)xcap_tag,
934 (unsigned long long)xcap_val) == -1)
939 if (lseek(fd, off, SEEK_SET) == (off_t)-1) {
947 if (file_printf(ms, ", %sstripped", stripped ? "" : "not ") == -1)
950 const cap_desc_t *cdp;
955 cdp = cap_desc_sparc;
966 if (file_printf(ms, ", uses") == -1)
969 while (cdp->cd_name) {
970 if (cap_hw1 & cdp->cd_mask) {
972 " %s", cdp->cd_name) == -1)
974 cap_hw1 &= ~cdp->cd_mask;
980 " unknown hardware capability 0x%llx",
981 (unsigned long long)cap_hw1) == -1)
985 " hardware capability 0x%llx",
986 (unsigned long long)cap_hw1) == -1)
991 if (cap_sf1 & SF1_SUNW_FPUSED) {
993 (cap_sf1 & SF1_SUNW_FPKNWN)
994 ? ", uses frame pointer"
995 : ", not known to use frame pointer") == -1)
998 cap_sf1 &= ~SF1_SUNW_MASK;
1001 ", with unknown software capability 0x%llx",
1002 (unsigned long long)cap_sf1) == -1)
1009 * Look through the program headers of an executable image, searching
1010 * for a PT_INTERP section; if one is found, it's dynamically linked,
1011 * otherwise it's statically linked.
1014 dophn_exec(struct magic_set *ms, int clazz, int swap, int fd, off_t off,
1015 int num, size_t size, off_t fsize, int *flags, int sh_num)
1019 const char *linking_style = "statically";
1020 const char *shared_libraries = "";
1021 unsigned char nbuf[BUFSIZ];
1023 size_t offset, align;
1024 off_t savedoffset = (off_t)-1;
1027 if (fstat(fd, &st) < 0) {
1032 if (size != xph_sizeof) {
1033 if (file_printf(ms, ", corrupted program header size") == -1)
1038 if (lseek(fd, off, SEEK_SET) == (off_t)-1) {
1043 for ( ; num; num--) {
1044 if (read(fd, xph_addr, xph_sizeof) == -1) {
1048 if (xph_offset > st.st_size && savedoffset != (off_t)-1) {
1049 if (lseek(fd, savedoffset, SEEK_SET) == (off_t)-1) {
1056 if ((savedoffset = lseek(fd, (off_t)0, SEEK_CUR)) == (off_t)-1) {
1061 if (xph_offset > fsize) {
1062 if (lseek(fd, savedoffset, SEEK_SET) == (off_t)-1) {
1071 linking_style = "dynamically";
1074 shared_libraries = " (uses shared libs)";
1077 if ((align = xph_align) & 0x80000000) {
1079 ", invalid note alignment 0x%lx",
1080 (unsigned long)align) == -1)
1087 * This is a PT_NOTE section; loop through all the notes
1090 if (lseek(fd, xph_offset, SEEK_SET)
1095 bufsize = read(fd, nbuf, ((xph_filesz < sizeof(nbuf)) ?
1096 xph_filesz : sizeof(nbuf)));
1097 if (bufsize == -1) {
1103 if (offset >= (size_t)bufsize)
1105 offset = donote(ms, nbuf, offset,
1106 (size_t)bufsize, clazz, swap, align,
1111 if (lseek(fd, savedoffset, SEEK_SET) == (off_t)-1) {
1120 if (file_printf(ms, ", %s linked%s", linking_style, shared_libraries)
1128 file_tryelf(struct magic_set *ms, int fd, const unsigned char *buf,
1133 char c[sizeof (int32_t)];
1140 Elf32_Ehdr elf32hdr;
1141 Elf64_Ehdr elf64hdr;
1144 if (ms->flags & (MAGIC_MIME|MAGIC_APPLE))
1147 * ELF executables have multiple section headers in arbitrary
1148 * file locations and thus file(1) cannot determine it from easily.
1149 * Instead we traverse thru all section headers until a symbol table
1150 * one is found or else the binary is stripped.
1151 * Return immediately if it's not ELF (so we avoid pipe2file unless needed).
1153 if (buf[EI_MAG0] != ELFMAG0
1154 || (buf[EI_MAG1] != ELFMAG1 && buf[EI_MAG1] != OLFMAG1)
1155 || buf[EI_MAG2] != ELFMAG2 || buf[EI_MAG3] != ELFMAG3)
1159 * If we cannot seek, it must be a pipe, socket or fifo.
1161 if((lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) && (errno == ESPIPE))
1162 fd = file_pipe2file(ms, fd, buf, nbytes);
1164 if (fstat(fd, &st) == -1) {
1170 clazz = buf[EI_CLASS];
1175 #define elf_getu(a, b) elf_getu32(a, b)
1177 #define elfhdr elf32hdr
1178 #include "elfclass.h"
1181 #define elf_getu(a, b) elf_getu64(a, b)
1183 #define elfhdr elf64hdr
1184 #include "elfclass.h"
1186 if (file_printf(ms, ", unknown class %d", clazz) == -1)