tree 4e4d9ded0c357b4ed52462e8d0b4a2e27a87e8e6
parent 85081c6b3c0b26129893c1bff6bfa42bc3ba2d2c
author David Benjamin <davidben@google.com> 1693338271 -0400
committer Boringssl LUCI CQ <boringssl-scoped@luci-project-accounts.iam.gserviceaccount.com> 1693342571 +0000

Explicitly mark saved registers with .cfi_restore

Although it works without these (we just refer the unwinder to the red
zone), older versions of libunwind seem to have a bug that cause it to
flakily fail to restore rbx without this. I've attempted to bisect the
problem, but the issue is very flaky and I've failed to find the culprit
four times now, so just give up and work around it. Explicit restores
match what we do in other files.

Hopefully this will clear some issues tha fiat-crypto's CI are running
into.

Change-Id: I6a19679a37cad8e93e6dee554b6a9b3b9b4bbe4a
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/62865
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
Auto-Submit: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>