Add an indication for an outermost frame to the unwind user frame
structure and stop unwinding when reaching an outermost frame.
This will be used by unwind user sframe, as SFrame may represent an
undefined return address as indication for an outermost frame.
Reviewed-by: Indu Bhagat <redacted>
Signed-off-by: Jens Remus <redacted>
Sashiko has reviewed this patch and found no issues. It looks great!
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Sashiko AI review · https://sashiko.dev/#/patchset/20260821195259.2688377-1-jremus@linux.ibm.com?part=2