Commit | Line | Data |
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8cc73a39 SDJ |
1 | /* Disable address space randomization based on inferior personality. |
2 | ||
e2882c85 | 3 | Copyright (C) 2008-2018 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 | ||
20 | #include "common-defs.h" | |
21 | #include "nat/linux-personality.h" | |
22 | ||
23 | #ifdef HAVE_PERSONALITY | |
24 | # include <sys/personality.h> | |
4c347be6 | 25 | # if !HAVE_DECL_ADDR_NO_RANDOMIZE |
8cc73a39 SDJ |
26 | # define ADDR_NO_RANDOMIZE 0x0040000 |
27 | # endif /* ! HAVE_DECL_ADDR_NO_RANDOMIZE */ | |
28 | #endif /* HAVE_PERSONALITY */ | |
29 | ||
8cc73a39 SDJ |
30 | /* See comment on nat/linux-personality.h. */ |
31 | ||
41272101 | 32 | maybe_disable_address_space_randomization:: |
8cc73a39 | 33 | maybe_disable_address_space_randomization (int disable_randomization) |
41272101 TT |
34 | : m_personality_set (false), |
35 | m_personality_orig (0) | |
8cc73a39 | 36 | { |
8cc73a39 SDJ |
37 | #ifdef HAVE_PERSONALITY |
38 | if (disable_randomization) | |
39 | { | |
40 | errno = 0; | |
41272101 TT |
41 | m_personality_orig = personality (0xffffffff); |
42 | if (errno == 0 && !(m_personality_orig & ADDR_NO_RANDOMIZE)) | |
8cc73a39 | 43 | { |
41272101 TT |
44 | m_personality_set = true; |
45 | personality (m_personality_orig | ADDR_NO_RANDOMIZE); | |
8cc73a39 | 46 | } |
41272101 | 47 | if (errno != 0 || (m_personality_set |
8cc73a39 SDJ |
48 | && !(personality (0xffffffff) & ADDR_NO_RANDOMIZE))) |
49 | warning (_("Error disabling address space randomization: %s"), | |
50 | safe_strerror (errno)); | |
51 | } | |
52 | #endif /* HAVE_PERSONALITY */ | |
41272101 TT |
53 | } |
54 | ||
55 | maybe_disable_address_space_randomization:: | |
56 | ~maybe_disable_address_space_randomization () | |
57 | { | |
58 | #ifdef HAVE_PERSONALITY | |
8cc73a39 | 59 | |
41272101 TT |
60 | if (m_personality_set) |
61 | { | |
62 | errno = 0; | |
63 | personality (m_personality_orig); | |
64 | if (errno != 0) | |
65 | warning (_("Error restoring address space randomization: %s"), | |
66 | safe_strerror (errno)); | |
67 | } | |
68 | #endif /* HAVE_PERSONALITY */ | |
8cc73a39 | 69 | } |