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