contrib/binutils-2.24/bfd/corefile.c

   1 /* Core file generic interface routines for BFD.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 2000, 2001, 2002, 2003, 2005,
   3    2007 Free Software Foundation, Inc.
   4    Written by Cygnus Support.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 /*
  24 SECTION
  25         Core files
  26
  27 SUBSECTION
  28         Core file functions
  29
  30 DESCRIPTION
  31         These are functions pertaining to core files.
  32 */
  33
  34 #include "sysdep.h"
  35 #include "bfd.h"
  36 #include "libbfd.h"
  37
  38 /*
  39 FUNCTION
  40         bfd_core_file_failing_command
  41
  42 SYNOPSIS
  43         const char *bfd_core_file_failing_command (bfd *abfd);
  44
  45 DESCRIPTION
  46         Return a read-only string explaining which program was running
  47         when it failed and produced the core file @var{abfd}.
  48
  49 */
  50
  51 const char *
  52 bfd_core_file_failing_command (bfd *abfd)
  53 {
  54   if (abfd->format != bfd_core)
  55     {
  56       bfd_set_error (bfd_error_invalid_operation);
  57       return NULL;
  58     }
  59   return BFD_SEND (abfd, _core_file_failing_command, (abfd));
  60 }
  61
  62 /*
  63 FUNCTION
  64         bfd_core_file_failing_signal
  65
  66 SYNOPSIS
  67         int bfd_core_file_failing_signal (bfd *abfd);
  68
  69 DESCRIPTION
  70         Returns the signal number which caused the core dump which
  71         generated the file the BFD @var{abfd} is attached to.
  72 */
  73
  74 int
  75 bfd_core_file_failing_signal (bfd *abfd)
  76 {
  77   if (abfd->format != bfd_core)
  78     {
  79       bfd_set_error (bfd_error_invalid_operation);
  80       return 0;
  81     }
  82   return BFD_SEND (abfd, _core_file_failing_signal, (abfd));
  83 }
  84
  85 /*
  86 FUNCTION
  87         bfd_core_file_pid
  88
  89 SYNOPSIS
  90         int bfd_core_file_pid (bfd *abfd);
  91
  92 DESCRIPTION
  93
  94         Returns the PID of the process the core dump the BFD
  95         @var{abfd} is attached to was generated from.
  96 */
  97
  98 int
  99 bfd_core_file_pid (bfd *abfd)
 100 {
 101   if (abfd->format != bfd_core)
 102     {
 103       bfd_set_error (bfd_error_invalid_operation);
 104       return 0;
 105     }
 106   return BFD_SEND (abfd, _core_file_pid, (abfd));
 107 }
 108
 109
 110 /*
 111 FUNCTION
 112         core_file_matches_executable_p
 113
 114 SYNOPSIS
 115         bfd_boolean core_file_matches_executable_p
 116           (bfd *core_bfd, bfd *exec_bfd);
 117
 118 DESCRIPTION
 119         Return <<TRUE>> if the core file attached to @var{core_bfd}
 120         was generated by a run of the executable file attached to
 121         @var{exec_bfd}, <<FALSE>> otherwise.
 122 */
 123
 124 bfd_boolean
 125 core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
 126 {
 127   if (core_bfd->format != bfd_core || exec_bfd->format != bfd_object)
 128     {
 129       bfd_set_error (bfd_error_wrong_format);
 130       return FALSE;
 131     }
 132
 133   return BFD_SEND (core_bfd, _core_file_matches_executable_p,
 134                    (core_bfd, exec_bfd));
 135 }
 136
 137 /*
 138 FUNCTION
 139         generic_core_file_matches_executable_p
 140
 141 SYNOPSIS
 142         bfd_boolean generic_core_file_matches_executable_p
 143           (bfd *core_bfd, bfd *exec_bfd);
 144
 145 DESCRIPTION
 146         Return TRUE if the core file attached to @var{core_bfd}
 147         was generated by a run of the executable file attached
 148         to @var{exec_bfd}.  The match is based on executable
 149         basenames only.
 150
 151         Note: When not able to determine the core file failing
 152         command or the executable name, we still return TRUE even
 153         though we're not sure that core file and executable match.
 154         This is to avoid generating a false warning in situations
 155         where we really don't know whether they match or not.
 156 */
 157
 158 bfd_boolean
 159 generic_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
 160 {
 161   char *exec;
 162   char *core;
 163   char *last_slash;
 164
 165   if (exec_bfd == NULL || core_bfd == NULL)
 166     return TRUE;
 167
 168   /* The cast below is to avoid a compiler warning due to the assignment
 169      of the const char * returned by bfd_core_file_failing_command to a
 170      non-const char *.  In this case, the assignement does not lead to
 171      breaking the const, as we're only reading the string.  */
 172
 173   core = (char *) bfd_core_file_failing_command (core_bfd);
 174   if (core == NULL)
 175     return TRUE;
 176
 177   exec = bfd_get_filename (exec_bfd);
 178   if (exec == NULL)
 179     return TRUE;
 180
 181   last_slash = strrchr (core, '/');
 182   if (last_slash != NULL)
 183     core = last_slash + 1;
 184
 185   last_slash = strrchr (exec, '/');
 186   if (last_slash != NULL)
 187     exec = last_slash + 1;
 188
 189   return filename_cmp (exec, core) == 0;
 190 }
 191