7309177235
Revert submission 1954983-master-I3030c47be9d02a27505bd4775c1982a20755758c Reason for revert: PAC has shipped with S, and we're going with app compat outreach rather than regressing security. Reverted Changes: I3030c47be:Disable pointer authentication in app processes. I3030c47be:Disable pointer authentication in app processes. Change-Id: I8761f08ddbd9077ff98b1a9a0c323de968792778
42 lines
1.6 KiB
C
42 lines
1.6 KiB
C
/*
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* Copyright (C) 2020 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#pragma once
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#include <stddef.h>
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inline uintptr_t __bionic_clear_pac_bits(uintptr_t ptr) {
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#if defined(__aarch64__)
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register uintptr_t x30 __asm("x30") = ptr;
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// This is a NOP on pre-Armv8.3-A architectures.
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asm("xpaclri" : "+r"(x30));
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return x30;
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#else
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return ptr;
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#endif
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}
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