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[Libunwind-devel] Strange behaviour on ARM

From: Ben Pye
Subject: [Libunwind-devel] Strange behaviour on ARM
Date: Mon, 07 Dec 2015 00:04:33 +0000

I am attempting to use libunwind as part of CoreCLR, it is used to unwind the native frames back to the first managed frame. I am running with UNW_ARM_UNWIND_METHOD=4 as leaving it to default to DWARF symbols results in unw_step failing and returning -UNW_EUNSPEC after being stuck on the first new frame from unw_step. Using UNW_ARM_UNWIND_METHOD=4 results in the first frame returned by unw_step having a PC that is meaningless. Any suggestions as to what could be causing this behaviour?

Many thanks,
Ben Pye.

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