[PATCH 10/10] arm64: stacktrace: unwind exception boundaries

[Mark Brown]

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

> When a PC is unwound from pt_regs::lr, dump_backtrace() will log this
> with an "L" marker so that it can be identified easily. For example,
> an unwind across an exception boundary will appear as follows:

> |  el1h_64_irq+0x6c/0x70
> |  _raw_spin_unlock_irqrestore+0x10/0x60 (P)
> |  __aarch64_insn_write+0x6c/0x90 (L)
> |  aarch64_insn_patch_text_nosync+0x28/0x80

> ... with a (P) entry for pt_regs::pc, and an (L) entry for pt_regs:lr.

This will be super useful.

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

modulo the stray file Miroslav mentioned.
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