Hi (sorry I was on a trip)

>> This patch is needed for us in AARCH64 - Restore "x0" and "x1" registers
>> because they contain exception pointer and selector.

According to the unw_resume() description for local unwinding,
restoring the machine state when no signal is involved only restore
the callee-saved registers (r19..r28 for AArch64 + the link register
r30).

Can you give me more input here why it is needed ?

Thanks,
Yvan

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