[AArch64] Unwinding support for return address signing
- When return address signing is enabled, the LR may be signed on function entry
- When an exception is thrown the return address is inspected used to unwind the call stack
- Before this happens, the return address must be correctly authenticated to avoid causing an abort by dereferencing the signed pointer
Differential Revision: https://reviews.llvm.org/D51432
git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@342895 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed