1/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005 Red Hat, Inc.
2   This file is part of Red Hat elfutils.
3   Written by Ulrich Drepper <drepper@redhat.com>, 1998.
4
5   Red Hat elfutils is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by the
7   Free Software Foundation; version 2 of the License.
8
9   Red Hat 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 GNU
12   General Public License for more details.
13
14   You should have received a copy of the GNU General Public License along
15   with Red Hat elfutils; if not, write to the Free Software Foundation,
16   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
17
18   Red Hat elfutils is an included package of the Open Invention Network.
19   An included package of the Open Invention Network is a package for which
20   Open Invention Network licensees cross-license their patents.  No patent
21   license is granted, either expressly or impliedly, by designation as an
22   included package.  Should you wish to participate in the Open Invention
23   Network licensing program, please visit www.openinventionnetwork.com
24   <http://www.openinventionnetwork.com>.  */
25
26#include <config.h>
27
28#include <errno.h>
29#include <fcntl.h>
30#include <gelf.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <string.h>
34
35int
36main (int argc, char *argv[])
37{
38  Elf *elf;
39  int fd;
40  GElf_Ehdr ehdr;
41  int cnt;
42
43  if (argc < 2)
44    {
45      puts ("missing parameter");
46      exit (1);
47    }
48
49  fd = open (argv[1], O_RDONLY);
50  if (fd == -1)
51    {
52      printf ("cannot open \"%s\": %s\n", argv[1], strerror (errno));
53      exit (1);
54    }
55
56  elf_version (EV_CURRENT);
57
58  elf = elf_begin (fd, ELF_C_READ, NULL);
59  if (elf == NULL)
60    {
61      printf ("cannot open ELF file: %s\n", elf_errmsg (-1));
62      exit (1);
63    }
64
65  if (elf_kind (elf) != ELF_K_ELF)
66    {
67      printf ("\"%s\" is not an ELF file\n", argv[1]);
68      exit (1);
69    }
70
71  if (gelf_getehdr (elf, &ehdr) == NULL)
72    {
73      printf ("cannot get the ELF header: %s\n", elf_errmsg (-1));
74      exit (1);
75    }
76
77  printf ("idx type    %*s %*s %*s %*s %*s  align flags\n",
78	  gelf_getclass (elf) == ELFCLASS32 ? 9 : 17, "offset",
79	  gelf_getclass (elf) == ELFCLASS32 ? 10 : 18, "vaddr",
80	  gelf_getclass (elf) == ELFCLASS32 ? 10 : 18, "paddr",
81	  gelf_getclass (elf) == ELFCLASS32 ? 9 : 12, "filesz",
82	  gelf_getclass (elf) == ELFCLASS32 ? 9 : 12, "memsz");
83
84  for (cnt = 0; cnt < ehdr.e_phnum; ++cnt)
85    {
86      static const char *typenames[] =
87      {
88	[PT_NULL] = "NULL",
89	[PT_LOAD] = "LOAD",
90	[PT_DYNAMIC] = "DYNAMIC",
91	[PT_INTERP] = "INTERP",
92	[PT_NOTE] = "NOTE",
93	[PT_SHLIB] = "SHLIB",
94	[PT_PHDR] = "PHDR"
95      };
96      GElf_Phdr mem;
97      GElf_Phdr *phdr = gelf_getphdr (elf, cnt, &mem);
98      char buf[19];
99      const char *p_type = typenames[phdr->p_type];
100
101      /* If we don't know the name of the type we use the number value.  */
102      if (phdr->p_type >= PT_NUM)
103	{
104	  snprintf (buf, sizeof (buf), "%x", phdr->p_type);
105	  p_type = buf;
106	}
107
108      printf ("%3d %-7s %#0*llx %#0*llx %#0*llx %#0*llx %#0*llx %#6llx ",
109	      cnt, p_type,
110	      gelf_getclass (elf) == ELFCLASS32 ? 9 : 17,
111	      (unsigned long long int) phdr->p_offset,
112	      gelf_getclass (elf) == ELFCLASS32 ? 10 : 18,
113	      (unsigned long long int) phdr->p_vaddr,
114	      gelf_getclass (elf) == ELFCLASS32 ? 10 : 18,
115	      (unsigned long long int) phdr->p_paddr,
116	      gelf_getclass (elf) == ELFCLASS32 ? 9 : 12,
117	      (unsigned long long int) phdr->p_filesz,
118	      gelf_getclass (elf) == ELFCLASS32 ? 9 : 12,
119	      (unsigned long long int) phdr->p_memsz,
120	      (unsigned long long int) phdr->p_align);
121
122      putc_unlocked ((phdr->p_flags & PF_X) ? 'X' : ' ', stdout);
123      putc_unlocked ((phdr->p_flags & PF_W) ? 'W' : ' ', stdout);
124      putc_unlocked ((phdr->p_flags & PF_R) ? 'R' : ' ', stdout);
125
126      putc_unlocked ('\n', stdout);
127
128      if (phdr->p_type == PT_INTERP)
129	{
130	  /* We can show the user the name of the interpreter.  */
131	  size_t maxsize;
132	  char *filedata = elf_rawfile (elf, &maxsize);
133
134	  if (filedata != NULL && phdr->p_offset < maxsize)
135	    printf ("\t[Requesting program interpreter: %s]\n",
136		    filedata + phdr->p_offset);
137	}
138    }
139
140  if (elf_end (elf) != 0)
141    {
142      printf ("error while freeing ELF descriptor: %s\n", elf_errmsg (-1));
143      exit (1);
144    }
145
146  return 0;
147}
148