1 files changed, 13 insertions, 5 deletions

diff --git a/src/lj_err.c b/src/lj_err.c
index 9652ef35..a0a28692 100644
--- a/src/lj_err.c
+++ b/src/lj_err.c
@@ -444,10 +444,10 @@ LJ_FUNCA int lj_err_unwind_dwarf(int version, int actions,
     if ((actions & _UA_FORCE_UNWIND)) {
       return _URC_CONTINUE_UNWIND;
     } else if (cf) {
+      ASMFunction ip;
       _Unwind_SetGR(ctx, LJ_TARGET_EHRETREG, errcode);
-      _Unwind_SetIP(ctx, (uintptr_t)(cframe_unwind_ff(cf) ?
-                                     lj_vm_unwind_ff_eh :
-                                     lj_vm_unwind_c_eh));
+      ip = cframe_unwind_ff(cf) ? lj_vm_unwind_ff_eh : lj_vm_unwind_c_eh;
+      _Unwind_SetIP(ctx, (uintptr_t)lj_ptr_strip(ip));
       return _URC_INSTALL_CONTEXT;
     }
 #if LJ_TARGET_X86ORX64
@@ -580,9 +580,17 @@ extern void __deregister_frame(const void *);
 
 uint8_t *lj_err_register_mcode(void *base, size_t sz, uint8_t *info)
 {
-  void **handler;
+  ASMFunction handler = (ASMFunction)err_unwind_jit;
   memcpy(info, err_frame_jit_template, sizeof(err_frame_jit_template));
-  handler = (void *)err_unwind_jit;
+#if LJ_ABI_PAUTH
+#if LJ_TARGET_ARM64
+  handler = ptrauth_auth_and_resign(handler,
+    ptrauth_key_function_pointer, 0,
+    ptrauth_key_process_independent_code, info + ERR_FRAME_JIT_OFS_HANDLER);
+#else
+#error "missing pointer authentication support for this architecture"
+#endif
+#endif
   memcpy(info + ERR_FRAME_JIT_OFS_HANDLER, &handler, sizeof(handler));
   *(uint32_t *)(info + ERR_FRAME_JIT_OFS_CODE_SIZE) =
     (uint32_t)(sz - sizeof(err_frame_jit_template) - (info - (uint8_t *)base));