================
@@ -1823,9 +1823,48 @@ extern "C" void *__libunwind_cet_get_jump_target() {
#endif
class _LIBUNWIND_HIDDEN Registers_arm64 {
+protected:
+ /// The program counter is used effectively as a return address
+ /// when the context is restored therefore protect it with PAC.
+ /// The base address of the context is used with the A key for
+ /// authentication and signing. Return address authentication is
+ /// still managed according to the unwind info.
+ inline uint64_t getAuthSalt() const {
+ return reinterpret_cast<uint64_t>(this);
+ }
+#if defined(_LIBUNWIND_IS_NATIVE_ONLY)
+ // Authenticate the given pointer and return with the raw value
+ // if the authentication is succeeded.
+ inline uint64_t auth(uint64_t ptr, uint64_t salt) const {
+ register uint64_t x17 __asm("x17") = ptr;
+ register uint64_t x16 __asm("x16") = salt;
+ asm volatile("hint 0xc" // autia1716
----------------
john-brawn-arm wrote:
This would be better on one line, same as the pacia1716 below.
https://github.com/llvm/llvm-project/pull/113368
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
