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70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/* Disable address space randomization based on inferior personality.
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Copyright (C) 2008-2020 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "gdbsupport/common-defs.h"
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#include "nat/linux-personality.h"
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#ifdef HAVE_PERSONALITY
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# include <sys/personality.h>
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# if !HAVE_DECL_ADDR_NO_RANDOMIZE
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# define ADDR_NO_RANDOMIZE 0x0040000
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# endif /* ! HAVE_DECL_ADDR_NO_RANDOMIZE */
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#endif /* HAVE_PERSONALITY */
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/* See comment on nat/linux-personality.h. */
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maybe_disable_address_space_randomization::
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maybe_disable_address_space_randomization (int disable_randomization)
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: m_personality_set (false),
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m_personality_orig (0)
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{
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#ifdef HAVE_PERSONALITY
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if (disable_randomization)
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{
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errno = 0;
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m_personality_orig = personality (0xffffffff);
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if (errno == 0 && !(m_personality_orig & ADDR_NO_RANDOMIZE))
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{
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m_personality_set = true;
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personality (m_personality_orig | ADDR_NO_RANDOMIZE);
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}
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if (errno != 0 || (m_personality_set
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&& !(personality (0xffffffff) & ADDR_NO_RANDOMIZE)))
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warning (_("Error disabling address space randomization: %s"),
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safe_strerror (errno));
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}
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#endif /* HAVE_PERSONALITY */
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}
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maybe_disable_address_space_randomization::
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~maybe_disable_address_space_randomization ()
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{
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#ifdef HAVE_PERSONALITY
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if (m_personality_set)
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{
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errno = 0;
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personality (m_personality_orig);
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if (errno != 0)
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warning (_("Error restoring address space randomization: %s"),
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safe_strerror (errno));
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}
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#endif /* HAVE_PERSONALITY */
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}
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