45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
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// Copyright 2023 The Crashpad Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "util/linux/pac_helper.h"
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#if defined(__has_feature)
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#define CRASHPAD_HAS_FEATURE(x) __has_feature(x)
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#else
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#define CRASHPAD_HAS_FEATURE(x) 0
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#endif
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#if CRASHPAD_HAS_FEATURE(ptrauth_intrinsics)
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#include <ptrauth.h>
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#endif
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#include "util/misc/address_types.h"
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namespace crashpad {
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VMAddress StripPACBits(VMAddress address) {
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#if CRASHPAD_HAS_FEATURE(ptrauth_intrinsics)
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address = ptrauth_strip(address, ptrauth_key_function_pointer);
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#elif defined(ARCH_CPU_ARM64)
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// Strip any pointer authentication bits that are assigned to the address.
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register uintptr_t x30 __asm("x30") = address;
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asm("xpaclri" : "+r"(x30));
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address = x30;
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#endif
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return address;
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}
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} // namespace crashpad
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