| 1 | /* Core file generic interface routines for BFD. |
| 2 | Copyright (C) 1990-2020 Free Software Foundation, Inc. |
| 3 | Written by Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | /* |
| 23 | SECTION |
| 24 | Core files |
| 25 | |
| 26 | SUBSECTION |
| 27 | Core file functions |
| 28 | |
| 29 | DESCRIPTION |
| 30 | These are functions pertaining to core files. |
| 31 | */ |
| 32 | |
| 33 | #include "sysdep.h" |
| 34 | #include "bfd.h" |
| 35 | #include "libbfd.h" |
| 36 | |
| 37 | /* |
| 38 | FUNCTION |
| 39 | bfd_core_file_failing_command |
| 40 | |
| 41 | SYNOPSIS |
| 42 | const char *bfd_core_file_failing_command (bfd *abfd); |
| 43 | |
| 44 | DESCRIPTION |
| 45 | Return a read-only string explaining which program was running |
| 46 | when it failed and produced the core file @var{abfd}. |
| 47 | |
| 48 | */ |
| 49 | |
| 50 | const char * |
| 51 | bfd_core_file_failing_command (bfd *abfd) |
| 52 | { |
| 53 | if (abfd->format != bfd_core) |
| 54 | { |
| 55 | bfd_set_error (bfd_error_invalid_operation); |
| 56 | return NULL; |
| 57 | } |
| 58 | return BFD_SEND (abfd, _core_file_failing_command, (abfd)); |
| 59 | } |
| 60 | |
| 61 | /* |
| 62 | FUNCTION |
| 63 | bfd_core_file_failing_signal |
| 64 | |
| 65 | SYNOPSIS |
| 66 | int bfd_core_file_failing_signal (bfd *abfd); |
| 67 | |
| 68 | DESCRIPTION |
| 69 | Returns the signal number which caused the core dump which |
| 70 | generated the file the BFD @var{abfd} is attached to. |
| 71 | */ |
| 72 | |
| 73 | int |
| 74 | bfd_core_file_failing_signal (bfd *abfd) |
| 75 | { |
| 76 | if (abfd->format != bfd_core) |
| 77 | { |
| 78 | bfd_set_error (bfd_error_invalid_operation); |
| 79 | return 0; |
| 80 | } |
| 81 | return BFD_SEND (abfd, _core_file_failing_signal, (abfd)); |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | FUNCTION |
| 86 | bfd_core_file_pid |
| 87 | |
| 88 | SYNOPSIS |
| 89 | int bfd_core_file_pid (bfd *abfd); |
| 90 | |
| 91 | DESCRIPTION |
| 92 | |
| 93 | Returns the PID of the process the core dump the BFD |
| 94 | @var{abfd} is attached to was generated from. |
| 95 | */ |
| 96 | |
| 97 | int |
| 98 | bfd_core_file_pid (bfd *abfd) |
| 99 | { |
| 100 | if (abfd->format != bfd_core) |
| 101 | { |
| 102 | bfd_set_error (bfd_error_invalid_operation); |
| 103 | return 0; |
| 104 | } |
| 105 | return BFD_SEND (abfd, _core_file_pid, (abfd)); |
| 106 | } |
| 107 | |
| 108 | |
| 109 | /* |
| 110 | FUNCTION |
| 111 | core_file_matches_executable_p |
| 112 | |
| 113 | SYNOPSIS |
| 114 | bfd_boolean core_file_matches_executable_p |
| 115 | (bfd *core_bfd, bfd *exec_bfd); |
| 116 | |
| 117 | DESCRIPTION |
| 118 | Return <<TRUE>> if the core file attached to @var{core_bfd} |
| 119 | was generated by a run of the executable file attached to |
| 120 | @var{exec_bfd}, <<FALSE>> otherwise. |
| 121 | */ |
| 122 | |
| 123 | bfd_boolean |
| 124 | core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd) |
| 125 | { |
| 126 | if (core_bfd->format != bfd_core || exec_bfd->format != bfd_object) |
| 127 | { |
| 128 | bfd_set_error (bfd_error_wrong_format); |
| 129 | return FALSE; |
| 130 | } |
| 131 | |
| 132 | return BFD_SEND (core_bfd, _core_file_matches_executable_p, |
| 133 | (core_bfd, exec_bfd)); |
| 134 | } |
| 135 | |
| 136 | /* |
| 137 | FUNCTION |
| 138 | generic_core_file_matches_executable_p |
| 139 | |
| 140 | SYNOPSIS |
| 141 | bfd_boolean generic_core_file_matches_executable_p |
| 142 | (bfd *core_bfd, bfd *exec_bfd); |
| 143 | |
| 144 | DESCRIPTION |
| 145 | Return TRUE if the core file attached to @var{core_bfd} |
| 146 | was generated by a run of the executable file attached |
| 147 | to @var{exec_bfd}. The match is based on executable |
| 148 | basenames only. |
| 149 | |
| 150 | Note: When not able to determine the core file failing |
| 151 | command or the executable name, we still return TRUE even |
| 152 | though we're not sure that core file and executable match. |
| 153 | This is to avoid generating a false warning in situations |
| 154 | where we really don't know whether they match or not. |
| 155 | */ |
| 156 | |
| 157 | bfd_boolean |
| 158 | generic_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd) |
| 159 | { |
| 160 | const char *exec; |
| 161 | const char *core; |
| 162 | const char *last_slash; |
| 163 | |
| 164 | if (exec_bfd == NULL || core_bfd == NULL) |
| 165 | return TRUE; |
| 166 | |
| 167 | /* The cast below is to avoid a compiler warning due to the assignment |
| 168 | of the const char * returned by bfd_core_file_failing_command to a |
| 169 | non-const char *. In this case, the assignement does not lead to |
| 170 | breaking the const, as we're only reading the string. */ |
| 171 | |
| 172 | core = bfd_core_file_failing_command (core_bfd); |
| 173 | if (core == NULL) |
| 174 | return TRUE; |
| 175 | |
| 176 | exec = bfd_get_filename (exec_bfd); |
| 177 | if (exec == NULL) |
| 178 | return TRUE; |
| 179 | |
| 180 | last_slash = strrchr (core, '/'); |
| 181 | if (last_slash != NULL) |
| 182 | core = last_slash + 1; |
| 183 | |
| 184 | last_slash = strrchr (exec, '/'); |
| 185 | if (last_slash != NULL) |
| 186 | exec = last_slash + 1; |
| 187 | |
| 188 | return filename_cmp (exec, core) == 0; |
| 189 | } |
| 190 | |