[PATCH 07/10] arm64: stacktrace: report source of unwind data

[Mark Brown]

On Thu, Oct 10, 2024 at 11:15:07AM +0100, Mark Rutland wrote:

> When analysing a stacktrace it can be useful to know where an unwound PC
> came from, as in some situations certain sources may be suspect or known
> to be unreliable. In future it would also be useful to track this so
> that certain unwind steps can be performed in a stateful manner. For
> example when unwinding across an exception boundary, we'd ideally unwind
> pt_regs::pc, then pt_regs::lr, then the next frame record.

Reviewed-by: Mark Brown <broonie at kernel.org>
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