Commit | Line | Data |
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8cc73a39 SDJ |
1 | /* Disable address space randomization based on inferior personality. |
2 | ||
3666a048 | 3 | Copyright (C) 2008-2021 Free Software Foundation, Inc. |
8cc73a39 SDJ |
4 | |
5 | This file is part of GDB. | |
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, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
268a13a5 | 20 | #include "gdbsupport/common-defs.h" |
8cc73a39 SDJ |
21 | #include "nat/linux-personality.h" |
22 | ||
4655f850 | 23 | #include <sys/personality.h> |
8cc73a39 | 24 | |
8cc73a39 SDJ |
25 | /* See comment on nat/linux-personality.h. */ |
26 | ||
41272101 | 27 | maybe_disable_address_space_randomization:: |
8cc73a39 | 28 | maybe_disable_address_space_randomization (int disable_randomization) |
41272101 TT |
29 | : m_personality_set (false), |
30 | m_personality_orig (0) | |
8cc73a39 | 31 | { |
8cc73a39 SDJ |
32 | if (disable_randomization) |
33 | { | |
34 | errno = 0; | |
41272101 TT |
35 | m_personality_orig = personality (0xffffffff); |
36 | if (errno == 0 && !(m_personality_orig & ADDR_NO_RANDOMIZE)) | |
8cc73a39 | 37 | { |
41272101 TT |
38 | m_personality_set = true; |
39 | personality (m_personality_orig | ADDR_NO_RANDOMIZE); | |
8cc73a39 | 40 | } |
41272101 | 41 | if (errno != 0 || (m_personality_set |
8cc73a39 SDJ |
42 | && !(personality (0xffffffff) & ADDR_NO_RANDOMIZE))) |
43 | warning (_("Error disabling address space randomization: %s"), | |
44 | safe_strerror (errno)); | |
45 | } | |
41272101 TT |
46 | } |
47 | ||
48 | maybe_disable_address_space_randomization:: | |
49 | ~maybe_disable_address_space_randomization () | |
50 | { | |
41272101 TT |
51 | if (m_personality_set) |
52 | { | |
53 | errno = 0; | |
54 | personality (m_personality_orig); | |
55 | if (errno != 0) | |
56 | warning (_("Error restoring address space randomization: %s"), | |
57 | safe_strerror (errno)); | |
58 | } | |
8cc73a39 | 59 | } |