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 <system.h>
22
23#include <assert.h>
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <fcntl.h>
27#include <inttypes.h>
28
29#include ELFUTILS_HEADER(elf)
30#include ELFUTILS_HEADER(dwelf)
31#include <gelf.h>
32
33#include <stdio.h>
34#include <unistd.h>
35#include <string.h>
36
37int
38main (int argc, char *argv[])
39{
40  int result = 0;
41  int cnt;
42
43  elf_version (EV_CURRENT);
44
45  for (cnt = 1; cnt < argc; ++cnt)
46    {
47      int fd = open (argv[cnt], O_RDONLY);
48
49      Elf *elf = elf_begin (fd, ELF_C_READ, NULL);
50      if (elf == NULL)
51	{
52	  printf ("%s not usable %s\n", argv[cnt], elf_errmsg (-1));
53	  result = 1;
54	  close (fd);
55	  continue;
56	}
57
58      size_t shdrstrndx;
59      if (elf_getshdrstrndx (elf, &shdrstrndx) == -1)
60	{
61	  printf ("elf_getshdrstrnd failed %s\n", elf_errmsg (-1));
62	  result = 1;
63	  close (fd);
64	  continue;
65	}
66
67      Elf_Scn *scn = NULL;
68      while ((scn = elf_nextscn (elf, scn)) != NULL)
69	{
70	  int idx = elf_ndxscn (scn);
71	  GElf_Shdr shdr;
72	  if (gelf_getshdr (scn, &shdr) == NULL)
73	    {
74	      printf ("gelf_getshdr failed: %s\n", elf_errmsg (-1));
75	      result = 1;
76	      break;
77	    }
78
79	  const char *sname = elf_strptr (elf, shdrstrndx, shdr.sh_name);
80	  if (sname == NULL)
81	    {
82	      printf ("couldn't get section name: %s\n", elf_errmsg (-1));
83	      result = 1;
84	      break;
85	    }
86
87	  if (startswith (sname, ".zdebug"))
88	    {
89	      ssize_t size;
90	      if ((size = dwelf_scn_gnu_compressed_size (scn)) == -1)
91		{
92		  printf ("dwelf_scn_gnu_compressed_size failed: %s\n",
93			  elf_errmsg (-1));
94		  result = 1;
95		  break;
96		}
97	      printf ("section %d: GNU Compressed size: %zx\n", idx, size);
98	    }
99	}
100
101      elf_end (elf);
102      close (fd);
103    }
104
105  return result;
106}
107