tree 1e9479533c17385f8ea8665b15582388ab048e0f
parent 30b371667d7d7e16bda70a2e95a3e1c012c1176f
author Dimitry Andric <dimitry@andric.com> 1562699683 +0000
committer Dimitry Andric <dimitry@andric.com> 1562699683 +0000

Revert merge of r360861:

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r360861 | mstorsjo | 2019-05-15 23:49:13 -0700 (Wed, 15 May 2019) | 13 lines

[PPC64][libunwind] Fix r2 not properly restored

This change makes each unwind step inspect the instruction at the
return address and, if needed, read r2 from its saved location and
modify the context appropriately.

The unwind logic is able to handle both ELFv1 and ELFv2 stacks.

Reported by Bug 41050

Patch by Leandro Lupori!

Differential Revision: https://reviews.llvm.org/D59694
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git-svn-id: https://llvm.org/svn/llvm-project/libunwind/branches/release_80@365539 91177308-0d34-0410-b5e6-96231b3b80d8