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394a46fdbaa..7210161c7ad 100644\n--- a/gcc/doc/tm.texi\n+++ b/gcc/doc/tm.texi\n@@ -3661,6 +3661,12 @@ for the abi and context in the @code{.unwabi} directive. If the\n be updated in @var{fs}.\n @end defmac\n \n+@defmac MD_CLEAN_MEMTAG_RANGE (@var{old_cfa}, @var{new_cfa})\n+This macro allows the target to add specific code to the call-frame\n+unwinding to clean the memory tags between addresses @var{new_cfa} and\n+@var{old_cfa}.\n+@end defmac\n+\n @defmac TARGET_USES_WEAK_UNWIND_INFO\n A C expression that evaluates to true if the target requires unwind\n info to be given comdat linkage. Define it to be @code{1} if comdat\ndiff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in\nindex 274bb899d0c..bd641f1ef76 100644\n--- a/gcc/doc/tm.texi.in\n+++ b/gcc/doc/tm.texi.in\n@@ -2887,6 +2887,12 @@ for the abi and context in the @code{.unwabi} directive. If the\n be updated in @var{fs}.\n @end defmac\n \n+@defmac MD_CLEAN_MEMTAG_RANGE (@var{old_cfa}, @var{new_cfa})\n+This macro allows the target to add specific code to the call-frame\n+unwinding to clean the memory tags between addresses @var{new_cfa} and\n+@var{old_cfa}.\n+@end defmac\n+\n @defmac TARGET_USES_WEAK_UNWIND_INFO\n A C expression that evaluates to true if the target requires unwind\n info to be given comdat linkage. Define it to be @code{1} if comdat\ndiff --git a/libgcc/unwind-dw2.c b/libgcc/unwind-dw2.c\nindex 14b08d01a3f..b2b45f1166e 100644\n--- a/libgcc/unwind-dw2.c\n+++ b/libgcc/unwind-dw2.c\n@@ -1413,6 +1413,11 @@ uw_install_context_1 (struct _Unwind_Context *current,\n long i;\n _Unwind_SpTmp sp_slot;\n \n+ /* We want to clean any residual memory tags before anything else. */\n+#ifdef MD_CLEAN_MEMTAG_RANGE\n+ MD_CLEAN_MEMTAG_RANGE (current->cfa, target->cfa);\n+#endif\n+\n /* If the target frame does not have a saved stack pointer,\n then set up the target's CFA. */\n if (!_Unwind_GetGRPtr (target, __builtin_dwarf_sp_column ()))\n","prefixes":["1/2"]}