1 /* Copyright (C) 2015 Red Hat, Inc.
2 This file is part of elfutils.
3
4 This file is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
8
9 elfutils is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
16
17 #ifdef HAVE_CONFIG_H
18 # include <config.h>
19 #endif
20
21 #include <assert.h>
22 #include <sys/types.h>
23 #include <sys/stat.h>
24 #include <fcntl.h>
25 #include <inttypes.h>
26
27 #include ELFUTILS_HEADER(elf)
28 #include ELFUTILS_HEADER(dwelf)
29 #include <gelf.h>
30
31 #include <stdio.h>
32 #include <unistd.h>
33 #include <string.h>
34
35 int
main(int argc,char * argv[])36 main (int argc, char *argv[])
37 {
38 int result = 0;
39 int cnt;
40
41 elf_version (EV_CURRENT);
42
43 for (cnt = 1; cnt < argc; ++cnt)
44 {
45 int fd = open (argv[cnt], O_RDONLY);
46
47 Elf *elf = elf_begin (fd, ELF_C_READ, NULL);
48 if (elf == NULL)
49 {
50 printf ("%s not usable %s\n", argv[cnt], elf_errmsg (-1));
51 result = 1;
52 close (fd);
53 continue;
54 }
55
56 size_t shdrstrndx;
57 if (elf_getshdrstrndx (elf, &shdrstrndx) == -1)
58 {
59 printf ("elf_getshdrstrnd failed %s\n", elf_errmsg (-1));
60 result = 1;
61 close (fd);
62 continue;
63 }
64
65 Elf_Scn *scn = NULL;
66 while ((scn = elf_nextscn (elf, scn)) != NULL)
67 {
68 int idx = elf_ndxscn (scn);
69 GElf_Shdr shdr;
70 if (gelf_getshdr (scn, &shdr) == NULL)
71 {
72 printf ("gelf_getshdr failed: %s\n", elf_errmsg (-1));
73 result = 1;
74 break;
75 }
76
77 const char *sname = elf_strptr (elf, shdrstrndx, shdr.sh_name);
78 if (sname == NULL)
79 {
80 printf ("couldn't get section name: %s\n", elf_errmsg (-1));
81 result = 1;
82 break;
83 }
84
85 if (strncmp(".zdebug", sname, strlen (".zdebug")) == 0)
86 {
87 ssize_t size;
88 if ((size = dwelf_scn_gnu_compressed_size (scn)) == -1)
89 {
90 printf ("dwelf_scn_gnu_compressed_size failed: %s\n",
91 elf_errmsg (-1));
92 result = 1;
93 break;
94 }
95 printf ("section %d: GNU Compressed size: %zx\n", idx, size);
96 }
97 }
98
99 elf_end (elf);
100 close (fd);
101 }
102
103 return result;
104 }
105