GDBserver
Loading...
Searching...
No Matches
linux-personality.c
Go to the documentation of this file.
1/* Disable address space randomization based on inferior personality.
2
3 Copyright (C) 2008-2023 Free Software Foundation, Inc.
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 "gdbsupport/common-defs.h"
22
23#include <sys/personality.h>
24
25# if !HAVE_DECL_ADDR_NO_RANDOMIZE
26# define ADDR_NO_RANDOMIZE 0x0040000
27# endif /* ! HAVE_DECL_ADDR_NO_RANDOMIZE */
28
29/* See comment on nat/linux-personality.h. */
30
32maybe_disable_address_space_randomization (int disable_randomization)
33 : m_personality_set (false),
34 m_personality_orig (0)
35{
36 if (disable_randomization)
37 {
38 errno = 0;
39 m_personality_orig = personality (0xffffffff);
40 if (errno == 0 && !(m_personality_orig & ADDR_NO_RANDOMIZE))
41 {
42 m_personality_set = true;
44 }
45 if (errno != 0 || (m_personality_set
46 && !(personality (0xffffffff) & ADDR_NO_RANDOMIZE)))
47 warning (_("Error disabling address space randomization: %s"),
48 safe_strerror (errno));
49 }
50}
51
54{
56 {
57 errno = 0;
58 personality (m_personality_orig);
59 if (errno != 0)
60 warning (_("Error restoring address space randomization: %s"),
61 safe_strerror (errno));
62 }
63}
maybe_disable_address_space_randomization(int disable_randomization)
#define ADDR_NO_RANDOMIZE