projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 8cc73a39 SDJ |
1 | /* Disable address space randomization based on inferior personality. |
| 2 | ||
| b811d2c2 | 3 | Copyright (C) 2008-2020 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 | ||
| 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 | } |